Abstract
A lift drive for a rail-guided cantilever construction device. The cantilever construction device comprises a main frame guided by at least one rail for receiving at least one formwork. The lift drive comprises a lift device, a first end of the lift device is designed to be connected to the main frame, and a second lift device end opposite the first end can be moved relative to the main frame when the first end of the lift device is connected to the main frame; a first fixing device connected to the first end of the lift device and designed to fix the first end of the lift device with respect to the at least one rail; and a second fixing device connected to the second end of the lift device and designed to fix the second end of the lift device with respect to the at least one rail.
Claims
1. A lift drive for a rail-guided cantilever construction device, the cantilever construction device comprising a main frame guided by at least one rail for receiving at least one formwork, the main frame being configured to move, along the at least one rail, horizontally forward in a first direction or horizontally backward in a second direction opposite the first direction, comprising: a lift device, wherein a first end of the lift device is configured to be connected to the main frame, and a second end of the lift device opposite the first end is movable relative to the main frame when the first end of the lift device is connected to the main frame; a first fixing device connected to the first end of the lift device and configured to fix the first end of the lift device with respect to the at least one rail; and a second fixing device connected to the second end of the lift device and configured to fix the second end of the lift device with respect to the at least one rail, wherein the first and second fixing devices can each be releasably fixed with respect to the at least one rail in a reversible manner, wherein the lift device is configured to be fixed or attached by the first fixing device and/or the second fixing device with respect to the at least one rail, and, when the rail-guided cantilever construction device is connected to the first end of the lift device, the rail-guided cantilever construction device is safely movable in a direction of travel while independent movement of the rail-guided cantilever construction device in or against the direction of travel is prevented.
2. The lift drive, according to claim 1, in which the lift device is fixed with respect to the at least one rail in such a way that: during a lifting movement of the first end of the lift device in a direction relative to the at least one rail, the second fixing device is fixed with respect to the at least one rail for the displacement of the main frame relative to the at least one rail, and during a lifting movement of the second end of the lift device in the one direction relative to the at least one rail, the first fixing device is fixed with respect to the at least one rail.
3. The lift drive according to claim 1, in which the main frame is guided by the at least one rail via a roller or antifriction bearing, and the first and second fixing devices are configured in a corresponding or identical form.
4. The lift drive according to claim 1, in which the first and second fixing devices can each be fixable with respect to the at least one rail by a positive and/or non-positive fit.
5. The lift drive according to claim 4, in which at least one of the fixing devices comprises at least one fixing layer or one fixing element to be applied to the at least one rail or the at least one fixing rail that is connected to the rail in the fixed state and in which an unlocking lift device is configured to interact with the fixing layer or the fixing element and an elastic means in such a way that the fixing layer or the fixing element rests against the at least one rail or the at least one fixing rail connected to the rail due to the elastic means in order to fix the fixing device when the unlocking lift device is retracted and/or is out of order.
6. The lift drive according to claim 4, in which at least one of the fixing devices comprises at least one latching/snap-in element in the form of a pawl or foldable latching lug, wherein the at least one rail or the at least one fixing rail comprises recesses and/or depressions in a longitudinal direction, into which the at least one latching/snap-in element can engage in order to fix the fixing device with respect to the at least one rail.
7. The lift drive, according to claim 6, in which a displacement length of the lift device is selected to be greater than or equal to a distance from the recesses and/or depressions located next to one another in the longitudinal direction of the at least one rail or the at least one fixing rail so that, when the fixing device is fixed with respect to the at least one rail, the displacement length is sufficient to move the main frame by the distance between the recesses and/or depressions located next to one another.
8. The lift drive according to claim 6, in which at least one of the first fixing device or the second fixing device comprises at least one manual, hydraulic, pneumatic or electromotive lift device for executing a linear translational movement, which is configured to ensure a reversible engagement of the at least one latching/snap-in element in the recess or the depression of the at least one rail or the at least one fixing rail.
9. The lift drive according to claim 8, in which the cantilever construction device is guided by two or four rails arranged parallel to one another and the first and second fixing devices each comprise one pawl per rail so that a total of two pawls of the first and second fixing devices is assigned each rail, and the lift drive of the cantilever construction device as a whole either comprises two rails and four pawls or four rails and eight pawls.
10. The lift drive, according to claim 9, in which the pawls of the respective first and/or second fixing devices of both rails, which are opposite one another in a direction perpendicular to the longitudinal direction of each rail are connected to one another via a web.
11. The lift drive according to claim 10, in which the at least one manual lift device comprises a rotatable toggle lever, in the form of a rod, shaft or a bar, one lever arm end of which is rotatably coupled to the web approximately centrally between the pawls that are opposite each other and perpendicular to the longitudinal direction of each rail, said lever arm end being formed to move the pawls of the first fixing devices of the two rails and/or of the second fixing devices of the two rails that are connected via the web in concert with each other.
12. The lift drive according to claim 10, in which at least one hydraulic, pneumatic or electromotive lift device is coupled to the web and formed to move the pawls of the first fixing devices of both rails and/or of the second fixing devices of both rails, which are connected via the web in concert.
13. The lift drive according to claim 8, comprising a controller configured such that the hydraulic or pneumatic lift device with an existing hydraulic or pneumatic assembly can be controlled in order to move the main frame by the lift device or to move an upper and/or lower support arrangement attached to the main frame relative to the main frame, or a hydraulic or pneumatic assembly that is separate from the existing hydraulic or pneumatic assembly.
14. The lift drive, according to claim 13, in which the controller is configured such that each latching/snap-in element can be controlled individually or a plurality of latching/snap-in elements of the first or second fixing devices can be controlled jointly via a hydraulic or pneumatic assembly.
15. The lift drive, according to claim 13, in which the controller is configured such that the locking/snap-in elements can be released from the at least one rail or the at least one fixing rail by the one or more hydraulic, pneumatic or electromotive lift device(s), and the locking/snap-in elements can be released independently by gravity and/or another force, thereby avoiding the actuation of the one or more hydraulic, pneumatic or electromotive lift device(s), into which the recesses and/or depressions of the at least one rail or the at least one fixing rail can engage.
16. The lift drive, according to claim 1, in which the lift device is configured as a hydraulic cylinder, spindle drive or rack and pinion drive, with the spindle or rack and pinion drive being driven, by an electric motor, actuator or linear drive.
17. A rail-guided cantilever construction device comprising a lift drive, according to claim 1.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
(1) In these,
(2) FIG. 1 is a cantilever construction device for use in bridge construction with a main frame guided by four rails, said frame being attached to a lift drive according to the invention;
(3) FIG. 2a, b is a detail of FIG. 1, showing the lift drive according to the invention with a lift device and fixing devices (a) and an enlarged detail thereof (b), each in a three-dimensional external view in a first embodiment;
(4) FIG. 3a, b is a fixing device with a positive fixation at one end of the lift device to which the main frame is attached in a lateral cross-sectional view in the unlocked (a) and the locked (b) state relative to the rail according to a first embodiment of the invention;
(5) FIG. 4a, b is the fixing device shown in FIG. 3b as a combination of two fixing components with a shared manual lift device in the locked state in a front view (a) and in a spatial external view (b) according to a second embodiment of the invention;
(6) FIG. 5a, b is the fixing device shown in FIG. 3b as a combination of two fixing components with a shared hydraulic lift device in the locked state in a front view (a) and in a spatial external view (b) according to a third embodiment of the invention,
(7) FIG. 6a-c is the lift drive according to the invention shown in FIG. 2b in a lateral cross-sectional view with a retracted lift device and locked fixing devices (a) with a partially extended lift device and unlocked fixing device at the end of the lift device to which the main frame is attached (b) and with an extended lift device and locked fixing devices (c);
(8) FIG. 7a-c are the lift drives, according to the invention, shown in FIG. 6a-c each in a spatial external view with the difference that the fixing device is unlocked in FIG. 7a at the end of the lift device to which the main frame is attached;
(9) FIG. 7d-f is the lift drive, according to the invention, shown in FIG. 2b in a spatial external view with a locked fixing device at the end of the lift device, to which the main frame is attached, and an extended lift device (a) and a partially retracted lift device (b), and with a retracted lift device and locked fixing devices (c);
(10) FIG. 8a, b is a fixing device with a positive fixation at one end of the lift device in a lateral cross-sectional view in the unlocked (a) and the locked (b) state relative to the rail according to a first embodiment of the invention;
(11) FIG. 9 is the lift drive, according to the invention, with a lift device and fixing devices according to the fixing apparatus shown in FIG. 8a, b in a second embodiment;
(12) FIG. 10 is a fixing device which can be fixed on a fixing rail with a positive fixation in a plan view in the cross section according to a second embodiment of the invention; and
(13) FIG. 11 is the lift drive according to the invention with a lift device and fixing devices according to the fixing apparatus shown in FIG. 10 in a second embodiment.
DETAILED DESCRIPTION
(14) FIG. 1 is a cantilever construction device 2 which is used to concrete a portion to be concreted at the end of an outer portion of a bridge 1. The cantilever construction device 2 comprises a base frame with two main frames 3, 3. For concreting the next portion of the bridge, the cantilever construction device 2 can be moved in the direction R1 in the Z direction. The main frame 3 comprises a plurality of struts 3a-3c, which are connected to one another. At the end of the strut 3a facing the bridge 1, the main frame 3 comprises a frame base 3d, which rests on two mutually parallel rails 4a, 4b, which are each attached to a surface 1a of the bridge via a roller bearing (not shown). The main frame 3 is connected to the further main frame 3 via cross struts Q1-Q3 and comprises struts 3a-3c which are connected to one another. The further main frame 3 is guided over a further frame base 3d by means of two rails 4a, 4b, which are aligned parallel to one another, so that the main frames 3, 3 can be moved together in the forward direction (Z direction) and/or in the reverse direction (negative Z-direction). For this purpose, the main frame 3 with a further frame base 3d rests on rails 4a, 4b. The rails 4a, 4b, 4a, 4b lie parallel to one another on the surface 1a and are connected to said surface so that the rails cannot lift off in the Y direction. The frame bases 3d, 3d comprise brackets, which engage under the rails 4a-4b and are secured against lifting off in the Y direction.
(15) To brace the bridge 1, a hollow box 1b is provided below the surface 1a in the negative Y direction as part of the bridge 1. In addition to the main frames 3, 3, the cantilever construction device 2 comprises an upper support arrangement 3 and a lower support arrangement 3. A formwork (not shown in FIG. 1) is attached to each of the support arrangements 3, 3 for concreting the next bridge portion.
(16) The frame bases 5, 5 are each attached to lift devices 5, 5 which adjoin the frame base 5, 5 in the negative Z direction. The detail A shows the region of the lift device 5, and the detail A shows the region of the lift device 5. The main frames 3, 3 are each connected to the lift drive, according to the invention, wherein the lift drive comprises the lift device 5 for driving the main frame 3, and the lift comprises the lift device 5 for driving the main frame 3.
(17) FIG. 2a shows a detail from FIG. 1 with the main frame 3 and the lift device 5, wherein the lift device 5 is attached to the frame base 3d of the main frame 3 in the Z direction. At an end of the frame base 3d that is not attached to the lift device 5, the frame base is connected to the struts 3a, 3b, which, in turn, are connected to one another via the strut 3c. In the negative Z direction, further struts adjoin the strut 3a, said further struts being connected to one another to form a further frame base which can be attached to the rails 4a, 4b, and is designed to form a counterweight to the upper support arrangement 3 and the lower support arrangement 3. The rails 4a, 4b extend in the Z direction and are aligned in parallel to one another in such a way that the frame base 3d can roll on both rails 4a, 4b to allow for a forward travel in the Z direction or a reverse travel in the negative Z direction. A support of the frame base 3d via a slide bearing on the rails 4, 4b or on just one of these rails is also possible.
(18) In FIG. 2b, an enlarged detail of FIG. 2a is shown in a spatial external view, wherein the lift drive according to the invention comprises, in addition to the lift device 5, a first fixing device 6 with first fixing components 6a, 6b and a second fixing device 7 with second fixing components 7a, 7b on opposite first and second ends of the lift device 5. The two first fixing components 6a, 6b are both connected to the first end of the lift device 5 to which the frame base 3d is attached. The first fixing component 6a is designed to fix the first end of the lift device 5 on the rail 4a, and the further first fixing component 6b is designed to fix the first end of the lift device 5 on the rail 4b. One fixing component 6a or 6b each would be sufficient for the first fixing device 6, but the main frame 3 is more securely fixed to the rails 4a, 4b via the frame base 3d if both first fixing components 6a, 6b are fixed together on the rails.
(19) At the second end of the lift device 5, which is opposite the first end of the lift device 5 to which the frame base 3d is attached, a second fixing device 7 with second fixing components 7a, 7b is connected to the lift device 5. The second fixing components 7a, 7b are each connected to the second end of the lift device. The second fixing components 7a are designed to fix the second end of the lift device to the rail 4a, and the second fixing components 7b are designed to fix the second end of the lift device to the rail 4b. One fixing component 7a or 7b each would be sufficient for the second fixing device 7, but the main frame 3 is more securely fixed to the rails 4a, 4b via the frame base 3d, the lift device 5 and the second fixing device 7 if both second fixing components 7a, 7b are fixed together on the rails.
(20) The frame base 3d is attached in the Z direction to the first end of the lift device 5 to which the first fixing device 6 is connected in such a way that the frame base is attached to the first end of the lift device 5 via the first fixing components 6a, 6b of the first fixing device 6. The frame base 3d does not have to be attached in the Z direction to the lift drive with the lift device 5 and the first fixing device 6 and the second fixing device 7, according to the invention, but the frame base 3d and thus the cantilever construction device can also be attached to the first end of the lift device 5 in the negative Z direction. The frame 3 can also be arranged between the first end of the lift device 5 and the first fixing device 6 via the frame base 3d as long as the main frame 3 is attached to the first end of the lift device 5, and the first fixing device is thus connected to the first end of the lift device 5 in such a way that the first fixing device can fix the first end of the lift device 5 to at least one of the rails 4a or 4b.
(21) Although the main frame 3 rests on the surface 1a of the bridge 1 via the two rails 4a, 4b, it is also possible for the main frame 3 to rest on only one of the two rails 4a, 4b. In this case, only a first fixing component 6a or 6b is connected as a first fixing device 6 to the first end of the lift device 5, and only one of the second fixing components 7a or 7b is connected to the lift device 5 as a second fixing device 7 at the second end of the lift device 5. Two rails 4a, 4b allow for a higher load capacity than just one rail 4a or 4b. A comparison of the lift drives, according to the invention, as shown in the details A, A in FIG. 1 with the lift devices 5, 5 and the main frames 3, 3 attached to lift devices via the frame bases 3d, 3d, shows that the explanations in FIG. 2a, 2b relating to the lift drive with the lift device 5 according to the invention and relating to the main frame 3 with the frame base 3d apply correspondingly to the lift drive with the lift device 5 and to the main frame 3 with the frame base 3d, according to the invention, as shown in detail A of FIG. 1.
(22) FIG. 3a shows the first fixing device 6 with the first fixing component 6a at the first end of the lift device 5 with which the main frame 3 is connectable and connected in a lateral cross-sectional view in the unlocked state relative to the rail 4b as a positively fixing device. The fixing components 6a, 6b have a corresponding structure and identical parts, which lowers the costs of producing the lift drive, according to the invention, but is not essential to the invention. The first fixing component 6b comprises a base plate 6b1 on which a first guide plate 6b3 is attached in the Y direction. In the negative Z direction, a holding plate 6b2 is attached to the base plate 6b 1 such that the holding plate 6b1 can engage below the rail 4b in the negative Y direction. The holding plate 6b2 is designed so that the first fixing component 6b and thus the first fixing device 6 are not lifted off the rail 4b in the Y direction. In order to ensure a forward or backward movement of the fixing component 6b, a distance between the holding plate 6b1 and the base plate 6b3 is selected to be greater than the height of the rail 4b.
(23) The first guide plate 6b3 comprises an elongated hole in the Y direction, as shown in FIG. 3b, in which a web 8 is guided, wherein a latching/snap-in element is attached to the end of the web 8 at one end of the web 8 in the X direction (out of the plane of the sheet) in the form of a pawl 6b5. The pawl 6b5 is guided next to the elongated hole by a recess 6b in the base plate 6b1 such that a width 6b of the blade 6b5 is selected to be equal to or smaller than a width 6b of a recess in the base plate 6b1. In FIG. 3a, the pawl 6b5 is in a position facing away from the rail 4b at the end, in particular, at the stop of the elongated hole in the Y direction, such that the fixing component 6b is unlocked relative to the rail 4b. In relation to the rail 4b and/or the guide plate 6b3, the pawl 6b5 is therefore in an unlocking position PE. A width 6b of a recess in the holding plate 6b2 is greater than the width 6b of the pawl 6b5 such that when the pawl 6b5 is moved in the negative Y direction, the end of the pawl 6b5 facing the rail 4b (in the negative Y direction) can pass through the recess in the holding plate 6b2 in addition to the recess in the base plate 6b1. In the unlocking position PE, the end of the pawl 6b5 facing the rail 4b is located in a region of the rail 4b facing away from the surface 1a (above the rail 4b) such that the fixing component 6b can be moved in the forward or backward direction of the main frame 3. The first fixing device 6 has a first connecting element 9 in the Z direction for fixing the first fixing device 6 to the frame base 3d and thus to the main frame 3. The first fixing device 6 is connected in the negative Z direction to the lift device 5 in such a way that the first fixing device can fix the first end of the lift device 5 on the rail 4b in the Z direction.
(24) FIG. 3b shows the first fixing component 6b in a lateral cross-sectional view in the locked state relative to the rail 4b. The elongated hole present in the first guide plate 6b3 has a width which is equal to or less than a width of the web 8. The pawl 6b5 is in a position facing the rail 4b at the end, in particular at the stop, of the elongated hole in the negative Y direction such that the fixing component 6b and thus the lift device 5, which is connected to the first fixing component 6b at its first end, is fixed. Therefore, the pawl 6b5 is in a locking position PV. In the locking position, the pawl 6b5 passes through a recess 4b1 made in the rail 4b having a width 4b which is equal to or greater than the width 6b of the pawl 6b5. A distance PA between the unlocking position PE and the locking position PV is chosen such that the pawl 6b5 passes through the recess in the base plate 6b1 with the width 6b, the recess in the rail 4b with the width 4b and at least part of the recess in the holding plate 6b2 with the width 6b. Since, in the locked position, the pawl 6b5 attached to the web 8 is guided through the elongated hole in the first guide plate 6b3 as well as the recess in the base plate 6b1 and the recess in the holding plate 6b2, a stable and reliable locking of the first fixing component 6b of the first fixing device 6 and thus the first end of the lift device 5 and the main frame 3 attached to it on the rail 4b is achieved.
(25) FIG. 4a shows the first fixing device 6 shown in FIG. 3a, b with the first fixing component 6b and a further combined first fixing component 6a with a shared manual lift device in the locking position PV in a front view and, in FIG. 4b, in an enlarged spatial external view. The further first fixing component 6b is designed in accordance with the first fixing component 6b and comprises a base plate 6a1 with a holding plate 6a2 attached to said first fixing component in the direction facing the rail 4a, i.e., in the negative Y direction, and with a first guide plate 6a3 and a second guide plate 6a3 attached to said first fixing component in the direction facing away from the rail 4a, i.e., the Y direction. Between the first and second guide plates 6a3, 6a3, which are substantially parallel to one another, a pawl 6a5 is guided, which extends in the Y direction and, in terms of the geometrical dimensions of the pawl 6b5, substantially corresponds to the first fixing component 6b, which is guided between the first guide plate 6b3 and a second guide plate 6b4, which are guided substantially parallel to said first guide plate. Both first fixing components 6a, 6b are connected to one another via a first connecting plate 10. The base plates 6a1, 6b1 are designed as a common plate, which simplifies the design of both fixing components, but can also be present in different plates that can be connected to one another.
(26) Both fixing components 6a, 6b share the web 8, at one end of which the pawl 6b5 is attached in the X direction and the pawl 6a5 is attached to the other end in the negative X direction. Approximately in the middle of the web 8, one end of a toggle lever 20 is rotatably coupled to the web via a clamp 18. The approximately central position 18 of the clamp 18 relative to the web 8 allows for a movement of the web 8 in a direction facing away from the rails 4a, b, i.e., in the Y direction, or a movement in a direction facing the rails 4a, b, i.e., in the negative Y direction, with approximately the same masses on both sides of the clamp 18. The clamp 18 comprises a recess 19 such that the end of the toggle lever 20 coupled to the web 8 can be rotatably connected to the clamp 18, for example, via a screw connection. The toggle lever 20 rests in a recess 6a3 of the first guide plate 6a3 and is connected to the toggle lever 20 via guide means 19, 19, which are on opposite sides of the first guide plate 6a3, which is guided relative to the first base plate 6a3 when the toggle lever 20 is guided by the recess 6a3. The guide means 19, 19 can each be realized by a screw connection in which a screw is guided through a through hole in the toggle lever 20 in the Z direction and is secured by a nut. In this simple way, the toggle lever 20 is guided through the head of the screw and the nut opposite said head on the other side of the toggle lever when the toggle lever is arranged or offset in the recess 6a3. The first guide plate 6b3 also has a recess at its end facing away from the rails 4a, 4b, i.e., in the Y direction, in such a way that the toggle lever 20 can be guided or offset not only in the recess 6a3 of the first fixing component 6a but also alternatively in the recess at the end of the first guide plate 6b3 of the first fixing component 6b.
(27) The clamp 18 can be fastened to the web 8 or movably attached to it, as is the case with the first fixing device 6 in FIG. 4a, b. The clamp is arranged on the web such that it can be moved along the web 8, that is to say, in the X direction and in the negative X direction. This way, when the toggle lever 20 is lifted out of the recess 6a3 in a direction facing away from the rails 4a, 4b, i.e., in the Y direction, said lever can be aligned substantially parallel to the web 8 in a space-saving manner. If the clamp 18 is at a minimal distance from the first guide plate 6a3 or the further first guide plate 6b3 or rests against said guide plate, the space requirement of the toggle lever 20 is minimized, which serves to improve work safety.
(28) Second connecting plates 11 are attached to first connecting plate 10 and are connected to one another via a bolt 12 with a locking pin 13 in order to be attached, for example, to the first end of the lift device 5. The first connecting element 9 for attaching, for example, the frame base 3d of the main frame 3 is also attached to the connecting plates 11 and thus to the first connecting plate 10 and thus to the first fixing components 6a, 6b and thus to the first fixing device 6. Third connecting plates 14 and a second connecting element 15 with a through hole 16 for attaching the frame base 3d are connected to the first connecting element 9.
(29) The structures of the first fixing components 6a, 6b are designed axially symmetrically in the Y/Z direction with respect to a plane formed centrally between the fixing components, which simplifies the common structure. Due to the shared use of the web 8 and the toggle lever 20 for moving toward and away from the rails 4a, 4b, i.e., the lifting and lowering of both pawls 6a5, 6b5, the common structure of the first fixing device 6 is additionally simplified. By locking the pawls in a direction facing the rails 4a, 4b, i.e., the negative Y direction, it is possible that a movement has to occur only in order to unlock the toggle lever 20 at the end that is opposite the end connected to the web 8 in the direction facing the rails 4a, 4b, i.e., the negative Y direction. As soon as the recesses 4a1 and 4b1 are present in the rails 4a, 4b, which are opposite one another in a direction perpendicular to the longitudinal direction of each of the rails 4a, 4b, i.e., in the X direction, as shown in FIG. 3b in such a way that the pawls 6a5, 6b5 can engage in these recesses, each of the pawls 6a5, 6b5 falls into the respective recess 4a1, 4b1 of each of the rails 4a, 4b due to the force of gravity. Alternatively, or in addition to gravity, another force, e.g., a spring force of a spring or some other elastic means, can be applied in such a way that each of the pawls 6a5, 6b5 falls into the respective recess 4a1, 4b1 of each of the rails 4a, 4b. This way, a semi-automatic manual operation of the first fixing device 6 can take place in a particularly advantageous embodiment of the lift drive, according to the invention. By means of the web 8 and the toggle lever 20, the first fixing component 6b can be releasably attached to the rail 4a in a reversible manner, and the further first fixing component 6a can be releasably attached to the rail 4b in a reversible manner. In the unlocking position PE, the first fixing component 6a is released from the rail 4a and, at the same time, the further first fixing component 6b is released from the rail 4b in this position. In the locking position PV, the fixing component 6a is attached to the rail 4a and the fixing component 6b is attached to the rail 4b. The first fixing component 6a and the further first fixing component 6b can be locked and unlocked together with the web 8 and the toggle lever 20, according to a particularly advantageous embodiment of the first fixing device, and thus according to the lift drive according to the invention. It is advantageous if the second fixing device 7 with the second fixing components 7a, 7b has a structure that corresponds to or is the same as that of the first fixing device 6. This simplifies the overall structure of the lift drive, according to the invention, and ensures a high reliability of the lift drive. It is also possible that the first and second fixing devices 6, 7 each comprise only one pawl which can engage in one of the rails 4a, 4b or in both rails 4a, 4b. The first fixing device 6 and/or the second fixing device 7 can also comprise more than two pawls which can be actuated individually, partially together or completely together.
(30) The first fixing device 6 shown in FIG. 3b is shown as a combination of the two fixing components 6a, 6b with a common hydraulic lift device in the locked state in the locking position PV in FIG. 5a in a front view and in FIG. 5b in a spatial external view. Because of the large number of identical parts/components, only the parts/components that are different or additional to the first fixing device 6 shown in FIG. 4a, 4b are discussed. The first fixing component 6a of the first fixing device 6 is assigned a first hydraulic lift device 21a-24a, which is arranged between the web 8 and the base plate 6a1. A lifting cylinder 21a with the retracted piston (not shown) is connected to the base plate 6a1 via a first flange 24a, which engages in a mount 22a of the base plate 6a1, and the piston is connected to the web 8 via a second flange 23a. FIG. 5b shows a through hole 25a in the mount 22a, which is designed to transition into a corresponding through hole in the first flange 24a in order to attach the lifting cylinder 21a to the base plate 6a1, for example, by means of a screw connection. The lifting cylinder 21a is designed to extend the piston in a direction facing away from the rail 4a, i.e., in the Y direction, and to retract said piston in a direction facing the rail 4a, i.e., in the negative Y direction. In the extended state of the lift device, the first fixing component 6a is in the unlocking position PE, and in the retracted state of the lift device, the first fixing component 6a is in the locking position PV.
(31) The further first fixing component 6b of the fixing device 6 comprises a further lift device 21b-24b, wherein the further lifting cylinder 21b is designed with the piston retracted (not shown) corresponding to the lifting cylinder 21a. Attached to the base plate 6b1 is a further mount 22b in which a further first flange 24b of the lifting cylinder 21b is connected to the base plate 6b1. At the end of the piston facing away from the rail 4b, there is a further second flange 23b via which the further lifting cylinder 21b is connected to the web 8. The further lifting cylinder 21b is designed to extend the piston in the direction facing away from the rail 4b, i.e., in the Y direction, and to unlock the fixing device 6 and to retract the web 8 in the direction facing the rail 4b, i.e., in the negative Y direction, into the piston in order to lock the fixing device 6. The design of the lift devices 21a-24a and 21b-24b is the same, which results in a simple design of the fixing device 6. Both lift devices are controlled together in order to ensure that both lift devices run synchronously.
(32) It is only possible to control the two lift devices when the first fixing device 6 is to be unlocked. As soon as the pawls 6a5 and 6b5 of the first fixing device 6 can engage in the recesses 4a1, 4b1 of the rails 4a, 4b, the pawls 6a5, 6b5 can, if the lift apparatuses or the lifting cylinders 21a, 21b run freely, engage in the recesses 4a1, 4b1 of the rails 4a, 4b without an actuation of the lifting cylinders 21, 21b. This way, the energy required to operate the first fixing device 6 can be reduced compared to a control in the unlocking position PE and the locking position PV of the first fixing device 6.
(33) The first fixing device 6 shown in FIG. 5a, 5b can also be designed and used as a second fixing device 7. It is advantageous if the first and the second fixing devices 6, 7 are designed in a corresponding or the same form in order to implement a simple and reliable lift drive, according to the invention. In the first fixing device 6 shown in FIG. 5a, 5b, the second connecting element 15 is used to attach the fixing device to the frame base 3d, and the first connecting plates 11 are used to attach the fixing device to the first end of the lift device 5. The first fixing device 6 can be used as a second fixing device 7, wherein both fixing devices then are aligned with each other rotated by 180 in the X/Z plane.
(34) FIG. 6a shows the lift drive according to the invention shown in FIG. 2b in a lateral cross-sectional view with the lift device 5 retracted and the fixing devices 6, 7 locked. The cross-sectional view corresponds to the cross-sectional view in FIG. 3a, 3b, and in addition to the pawl 6b5 of the further first fixing component 6b of the first fixing device 6, the pawl 765 of the further second fixing component 7b of the second fixing device 7 is shown. Both pawls are in the negative Y direction in the locking position PV, which causes both ends of the lift device 5 to be fixed on the lifting cylinder 5b on the rail 4b. Since, via the web 8, the pawl 6a5 of the first fixing component 6a of the first fixing device 6 and the pawl 7a5 of the second fixing component 7a of the second fixing device 7 are also in the locked position, the lift device 5 is fixed to the rails 4a and 4b via four pawls, with the first and second fixing devices 6, 7 each being releasably attached to the rails 4a, 4b with two pawls in a reversible manner. The rail 4b comprises the recesses 4b1-4b4, with the pawl 6b5 of the first fixing device 6 engaging in the recess 4b3 and the pawl 7b5 of the second fixing device 7 engaging in the recess 4b1 in the locked or attached state. Via the first fixing device 6, the main frame 3 is connectable and connected to the first end of the lift device 5 via its frame base 3d. The first fixing device 6 is connected to the first end of the lift device 5 in such a way that the first end of the lift device 5 can be fixed to the rail 4b via the first fixing device 6, and, in the Z direction, a position 6P of the first fixing device 6 relative to the rail 4a, 4b corresponds to a position of the first end of the lift device 5. For this purpose, it is defined below that the first end of the lift device 5 is located in an X/Y plane at the level of the position 6P of the web 8 in the Z direction. This definition is supported, for example, by FIGS. 4b and 5b, in each of which it is shown that the bolt 12 for connecting the first end of the lift device 5 in the X/Y plane is approximately at the level of the web 8 in the Z direction. A corresponding definition applies to a position 7P, 7P2, 7P3 of the second fixing device. In another embodiment, the first end of the lift device 5 can be offset from the web 8 in the longitudinal direction of the rail 4a, 4b and/or in the direction transversely to the longitudinal direction facing away from the rail 4a, 4b. The frame base 3d and thus the main frame 3 can be connected to the first fixing device 6 in the Z direction. In the starting position 6P, there is no displacement 6A of the first fixing device 6, and thus also no displacement of the first end of the lift device 5, and no movement of the main frame 3 relative to the rails 4a, 4b in their longitudinal direction.
(35) In FIG. 6b, the lift drive from FIG. 6a is shown at a later point in time compared to the state of the lift drive in FIG. 6a. A piston 5a of the lift device 5 is partially extended relative to the lifting cylinder 5b with a displacement of the length 5aA1. Since the first fixing device 6 is in the unlocked state relative to the rails 4a, 4b according to the unlocking position PE of the pawl 6b5 and the second fixing device 7 is still in a locked state according to the locking position PV of the pawl 765, the lifting movement of the lift device 5 with the displacement length 5aA1 leads to a displacement 6A1 of the first fixing device 6. The displacement length 5aA1 therefore corresponds to the movement 6A1 of the first end of the lift device 5 and the main frame 3 and thus the cantilever construction device 2 in the longitudinal direction of the rails 4a, 4b in the Z direction. The position of the first fixing device 6 has therefore shifted from the position 6P to the new position 6P1 in the Z direction. A distance 4bA between the adjacent recesses 4b2, 4b3 in the rail 4b is greater than the displacement length 5aA1, and the pawl 6b5 cannot engage in a further recess in the rail 4b that is spaced by the distance 4bA from the recess 4b3 into which the pawl 6b5 in the initial state has engaged in position 6P. By extending the lift device 5 with the displacement length 5aA1, the main frame 3 attached to the first end of the lift device 5 is moved in the Z direction relative to the rail 4b in its longitudinal direction by the displacement 6A1.
(36) In FIG. 6c, the lift drive according to the invention with a substantially completely extended lift device 5 and locked fixing devices 6, 7 is shown at a later point in time compared to the state of the lift drive in FIG. 6b. The substantially complete displacement length 5aA2 corresponds at least to the distance 4bA between adjacent recesses 4b2, 4b3 in the rail 4b, and due to the engagement of the pawl 6b5 in the recess 4b4 adjacent to the recess 4b3, the first fixing device 6 is displaced by the distance 4bA to the starting position 6P which corresponds to a displacement 6A2 of the first fixing device 6. The position 6P2 of the first fixing device 6 is consequently in the X/Y plane, in which the center of the recess 4b4 in the rail 4b lies, in which the pawl 6b5 engages. The pawl 6b5 is in the locking position PV, and the first fixing device 6 is, like the second fixing device 7, attached to the rail 4b. Compared to the initial state of the lift drive in FIG. 6a, the first end of the lift device 5 and thus the main frame 3 and thus the cantilever construction device 2 is moved by the displacement 6A2 in the longitudinal direction of the rail 4a, 4b, i.e., in the Z direction. According to the locking position PV of the pawl 7b5, the position of the second fixing device 7 has remained unchanged relative to the rail 4b during the displacement of the first fixing device 6 from position 6P to 6P2.
(37) In FIGS. 7a to 7c, the states of the lift drive according to the invention shown in FIG. 6a-6c are each represented in a spatial external view. A difference between the state of the lift drive in FIGS. 6a and 7a is that, in contrast to the locked state of the first fixing device 6 in FIG. 6a, the first fixing device 6 in FIG. 7a is unlocked and is in the unlocking position PE. The frame base 3d adjoins the first fixing device 6 in the Z direction and is attached to the same. The first and second fixing devices 6, 7 each include the toggle lever 20 for a manual locking and unlocking of the respective fixing device 6, 7. FIG. 7a shows the starting positions 6P without the displacement 6A of the first fixing device 6 when the lift device 5 is retracted and without the displacement length 5aA. The frame base 3d is spaced from an edge of the marking 4bP of the rail 4b by the frame base distance 4bP in the longitudinal direction of the rail 4b. The starting position 6P of the first fixing device 6 is spaced from the edge of the marking 4bP in the longitudinal direction of the rail 4b by the distance 6P.
(38) In FIG. 7b, the lift device 5 is extended by the displacement length 5aA1 with the second fixing device 7 fixed on each of the rails 4a, 4b. In FIG. 7c, the first fixing device 6 is displaced from the starting position 6P into the new position 6P2 by the displacement 6A2 in the longitudinal direction of the rails 4a, 4b in the Z direction. While the position 6P of the first fixing device 6 of the lift drive in FIG. 7a has shifted by the displacement 6A2 into the new position 6P2 in the longitudinal direction of the rails 4a, 4b, i.e., in the direction R1, the position 7P2 of the second fixing device 7, which is spaced apart by the distance 7a2 from the edge of the marking 4bP in the longitudinal direction of the rail 4b in the negative Z direction, has remained unchanged in FIG. 7c with respect to the retracted state of the lift device 5 in FIG. 7a. While the toggle lever 20 of the first fixing device 6 is guided onto the first guide plate 6b3 in the X direction, the toggle lever 20 of the second fixing device 7 is guided onto the first guide plate 7a3 in the negative X direction. As an alternative to the lift drive according to the invention as shown in FIGS. 7a to 7c, the toggle lever 20 for both fixing devices 6, 7 can be located in the X direction or in the negative X direction.
(39) In contrast to the states of the lift drive according to the invention shown in FIGS. 7a to 7c, the first fixing device 6 in each of FIGS. 7d to 7f is at rest relative to the rails 4a, 4b and the second fixing device 7 is displaced in the Z direction relative to the rails 4a, 4b in the longitudinal direction of the rails 4a, 4b. In FIG. 7d, the lift device 5 is fully extended by a displacement length 5aA2 so that the first fixing device 6 is in the position 6P2. The first fixing device 6 is locked and attached to the rail 4b so that the first fixing device 6, the first end of the lift device 5 and the frame base 3d and thus the cantilever construction device 2 remain at rest relative to the rails 4a, 4b. The second fixing device 7 is unlocked and therefore movable in the R1 direction in the Z direction.
(40) In FIG. 7e, with the position 6P2 of the first fixing device 6 being unchanged, the lift device 5 is partially retracted so that a shorter displacement length 5aA3 results with respect to the displacement length 5aA2 when the lift device 5 is fully extended. The partially retracted lift device, which is fixed at the first end of the lift device on the rail 4b, leads to a position 7P3 of the second fixing device which is shifted relative to the position 7P2 when the lift device 5 is fully extended in the direction R1, i.e., in the Z direction.
(41) In FIG. 7f, the lift device 5 is completely retracted without a lift, as can be seen from the non-existent displacement length 5aA. The second fixing device 7 is spaced apart from the edge of the marking 4bP by the distance 7Aa in the longitudinal direction of the rail 4b in the negative Z direction. Relative to the lifting cylinder 5a, the piston 5b is moved in the negative Z direction during the extension movement of the lift device 5 (see FIG. 7b). In contrast to this, the piston 5b is moved in the Z direction relative to the lifting cylinder 5a when the lift device 5 is retracted (see FIG. 7e). While the second fixing device 7 is resting relative to each of the rails 4a, 4b, an extension of the lift device 5 leads to a displacement of the frame base 3d and thus the cantilever construction device 2. During the retraction of the lift device 5, the first fixing device and thus the frame base 3d and the cantilever construction device 2 are fixed relative to each of the rails 4a, 4b, and the lift device can be fully retracted in order to be able to start the next extension process.
(42) A comparison between the states of the lift drive in FIGS. 7a and 7f shows that the frame base 3d and thus the cantilever construction device 2 is displaced by a difference 3dA1-3dA in the longitudinal direction of the rail 4a, 4b, i.e., in the Z direction, with this difference corresponding to the displacement 6A2 of the first fixing device 6 and the substantially entire displacement length 5aA2. The extension and retraction cycle of the lift drive, according to the invention, with the lift device 5 and the first and second fixing devices 6, 7 shown in FIG. 7a-f is repeated until a predetermined displacement of the cantilever construction device in the forward or backward direction is achieved. Instead of an extension that is performed when the first fixing device 6 is fixed, a displacement of the cantilever construction device 2 can also be achieved by a retraction of the lift device when the second fixing device 7 is fixed.
(43) FIG. 8a shows a fixing device 6 with a positive fixing achieved by means of a fixing layer 26 at one end of the lift device 5 (not shown) in a lateral cross-sectional view in the unlocked state in the unlocking position PE. An elastic means 28 in the form of several leaf or disk springs is arranged in an elastic means housing 27. The elastic means has a spring force of 300 kN, for example. The elastic means housing 27 is connected to a guide housing 34 which engages around an upper part of the double-T-shaped rail 4b and is moveable relative to the rail 4b in the Z direction (out of the plane of the sheet). In the lower region of the guide housing 34, counter-pressure fixing layers 33 are arranged which, when the fixing layer 26 rests in the negative X direction on the rail 4b, provide counterpressure in the positive Y direction to fix the fixing device 6 on the rail 4b.
(44) To increase the stability and thus the counterpressure of the counterpressure fixing layers 33, the counterpressure fixing layers and/or the guide housing are connected to the elastic means housing 27 via counterpressure arms 32. The elastic means 28 is connected to the fixing layer 26 in the form of a brake lining via a pretensioning means 29 and a pretensioning fixing means 29S. An unlocking lift device 30, which comprises an unlocking lift device piston 30a and an unlocking lift device cylinder 30b, is arranged between the pretensioning fixing means 29S and an upper side of the elastic means housing 27. The unlocking lift device comprises an unlocking lift device connection 31 on the lifting cylinder 30b for a connection to a hydraulic line. In the unlocking position PE, a depth 28a of the elastic means 28 is, for example, 85.6 mm, which leads to an air gap 26L1 between an underside of the fixing layer 26 and an upper side of the rail 4b of, for example, 7 mm. In FIG. 8a, the piston 30a of the unlocking lift device 30 is extended in such a way that the elastic means 28 is compressed in the Y direction, and the fixing layer 26 is thereby lifted off the rail 4b so that the air gap 26L1 is formed. In the unlocked position, the fixing device 6 can therefore be displaced with respect to the rail 4b in the Z direction or in the negative Z direction.
(45) In FIG. 8b, the fixing device 6 from FIG. 8a is shown in the locking position PV. The air gap 26L2 is 0 mm, which leads to an expansion of the depth 28A of, for example, 92.6 mm compared to the depth 28A in FIG. 8a of, for example, 85.6 mm.
(46) FIG. 9 shows a lift drive, according to the invention, with two of the fixing devices 6, 7 shown in FIG. 8a, 8b, which are each arranged at one of the two ends of the lift device 5 with the piston 5a and the lifting cylinder 5b. The first fixing device 6 is in the locking position PV, and the second fixing device 7 is in the unlocking position PE (see PE in FIG. 8a and PV in FIG. 8b). The lift device 5 is designed as a double-acting lift device in such a way that the lift device 5 can both be extended via a hydraulic line and retracted via a further hydraulic line.
(47) For this purpose, the lifting cylinder 5b of the lift device 5 is connected via a first port A and via a second port B of the lift device 5 to a pressure source 35 in the form of a hydraulic pressure source. In addition to the first and second ports A, B, a directional valve 36 in the form of a 4/3-way valve includes the further ports P and T in the form of a pressure port P and a tank port T. The directional control valve has three mechanically actuatable positions with port P being connected to port A in a first position and port T being connected to port B. Independently of this, there is, in a middle position between P and T, pressureless circulation such that that A and B are relieved toward a tank and, in addition to the unpressurized circulation, a floating position is assumed so that the directional control valve 36 can easily be actuated by an external force. In the third position, port P is connected to port B and port A is connected to port T independently of this. The port A is connected to a changeover valve 37 via a first connecting line 36a and a first changeover valve line 36A1. Port B is connected to the changeover valve 37 via a second connecting line 36b and a second changeover valve line 36B1. Via the changeover valve 37, the first changeover valve line 36A1 and the second changeover valve line 36B1 are connected with a line 37A to the first fixing device 6 and with a line 37b to the second fixing device 7, each by connecting to the port 31 of the unlocking lift devices 30 of the first and second fixing devices 6, 7.
(48) Between the first connecting line 36a and the first changeover valve line 36A1, there is a first branch point V1 such that port A is not only connected to the changeover valve 37 but also to a first port of the lifting cylinder 5b via a first lift device line 36A2 for extending the piston of the lift device 5. Port B is connected via a second branch point V2 via the second connecting line 36b and the second line 36B2 of the lift device 5 to a second port of the lifting cylinder 5b of the lift device 5 for retracting the piston 5a of the lift device 5.
(49) Depending on whether the cantilever construction device 2 is to be moved or fixed, the first fixing device 6 is unlocked, and the second fixing device 7 is locked, or vice versa. The locking and unlocking of the fixing devices 6, 7 takes place alternately in such a way that ports A and B on the lifting cylinder 5b are controlled such that the fixing device 6, 7 that must be locked for the displacement of the cantilever construction device 2 (not shown) is used for the extension or retraction of the piston 5a. Instead of moving forward in the forward direction R1 of the cantilever construction device 2, ports A and B of the fixing devices 6, 7 can be interchanged via the changeover valve 37 for a reverse travel in the negative R1 direction. This way, a shifting of the cantilever construction device 2 in the forward or reverse direction, i.e., in the positive or negative Z direction, is made possible in a simple manner while observing the existing safety requirements.
(50) FIG. 10 shows, in a cross-sectional plan view, a fixing device 6 with an axis 40A that can be fixed to a fixing rail 40 with a positive fixation by means of an application of one or more fixing elements 46 on a surface of the fixing rail 40. The fixing device 6, which can be fixed in a positive manner, comprises an elastic means frame 47 with an elastic means 28 in the form of one or more leaf or disc springs being arranged in the elastic means frame 47. The elastic means 28 can consist, for example, of eight disc springs with a spring force of 14 kN. Between the elastic means 28 and an unlocking lift device piston 30a, which is guided in an unlocking lift device lifting cylinder 30b of an unlocking lift device 30, a counter-pressure element 48 in the form of a conically shaped hollow cylinder, which is connected to the piston 30a of the unlocking lift device 30 via at least one connecting web 44, is arranged. In FIG. 10, the counterpressure element is connected to the piston 30a of the unlocking lift device 30 via two connecting webs 44 for the introduction of the corresponding forces by the piston of the unlocking lift device 30.
(51) When the piston 30a is extended via a port 31 of the unlocking lift device upon the actuation of the unlocking lift device 30, the connecting webs 44 press the counterpressure element against the elastic means 28, thus releasing at least one fixing element 46, which is arranged between the counterpressure element 48 and the fixing rail 40. For this purpose, a fixing element 46 shown in FIG. 10 above the fixing rail 40 in the form of a wedge can be moved in the positive X direction, and a further fixing element, which is different from the upper fixing element 46 and shown in FIG. 10 below the fixing rail 40, can be moved in the negative X direction when the piston 30a of the unlocking lift device 30 is extended. Here, compared to the retracted state of the piston 30a, a gap 48A between the counterpressure element 46 and the elastic means frame 47 increases. The fixing element 46 is guided by a projection 47V in the elastic means frame 47, which creates a recess in the elastic means frame 47, into which a projection 46V of the fixing element 46 can engage in such a way that, when the fixing device 6 is unlocked, the fixing element 46 cannot divert in the negative Z direction and can wedge itself between the fixing rail 40 and the counterpressure element 48.
(52) For a better detachment of the fixing element 46 when the piston 30A is extended to unlock the fixing device 6, release elements 45 are arranged on the piston 30A next to the connecting webs 44, which engage between the respective fixing element 46 and a surface of the fixing rail 40 in order to detach the fixing element from the surface of the fixing rail 40 and to unlock the fixing device 6. Instead of a conically shaped hollow cylinder, the counterpressure element 48 can also consist of a plurality of wedge-shaped elements that are not directly connected to one another. The elastic means frame 47 has bases 43 on opposite sides of the fixing rail 40 in order to connect to one end of the lift device 5. The lifting cylinder 30b of the unlocking lift device 30 is connected to the elastic means frame 47 in such a way that when the piston 30A is extended, the piston 30A can move relative to the elastic means frame 47 (in the negative Z direction). In order to generate a fixing force with a fixing force direction 46F of, for example, 40 kN, a fixing force in the direction 46F, which is generated by the fixing element 46 due to its contact with the fixing rail 40 of, for example, 133 kN, can be generated with the arrangement of the fixing device 6 shown in FIG. 10. The gap between the counterpressure element 48 and the elastic means frame 47 can have a width of, for example, 20 mm. For example, the fixing element 46 can consist of three separate elements, in particular, arranged in an X/Y plane at angles of 120 to one another. When the unlocking lift device 30 is controlled hydraulically, a pressure of 180 bar can be applied to the port 31 of the unlocking lift device, for example. A fixing rail 40 with a round cross section can have a diameter of 60 mm, for example.
(53) FIG. 11 shows a further embodiment of the lift drive, according to the invention, with the lift device 5 and fixing devices according to the fixing device 6 shown in FIG. 10 as fixing devices 6, 7. The hydraulic control of the fixing devices 6, 7 and the lifting cylinder 5b of the lift device 5 for extending or retracting the piston 5a corresponds to the hydraulic circuit shown in FIG. 9. Reference is therefore made to the description of the hydraulic circuit in FIG. 9 to explain the hydraulic circuit in FIG. 11.
(54) In contrast to the arrangement shown in FIG. 9, the rail 4b, on which the lifting cylinder 5 and a latching head 49 are guided at one end of the lift device 5 and the frame base 3d is guided at an opposite end of the lift device 5, is connected to the fixing rail 40 via at least one connecting component 41. An axis 40A of the fixing rail 40 runs parallel to the rail 4b with the fixing rail 40 being connected to the rail 4b via the connecting component 41 in such a way that a fixing effect of one or both of the fixing devices 6, 7 leads to a fixing of the one and/or the other end of the lift device 5 with respect to the rail 4b. An additional fixing rail 40 attached to the rail allows the use of conventional lift drives for moving the rail-guided cantilever construction device 2 in which, on one end, the latching head 49, which is arranged relative to a latching device 42, is attached in such a way that, when the latching head 49 rests on the latching device 42, the cantilever construction device can be moved in the Z direction when the piston 5a is extended. Alternatively according to the invention, as shown in FIG. 10, the fixing device 7 can be fixed on the fixing rail 40 in the locking position PV when the piston 30a of the unlocking lift device 30 is retracted, and the fixing device 7 can pass its position, which is fixed with respect to the rail 4b, via a first coupling element 50 and a second coupling element 51 to the latching head 49 and thus to the one end of the lift device 5. For this purpose, one end of the first coupling element 50 is connected with the latching head and another end of the first coupling element 50 opposite the one end to the bases 43 of the fixing device 7. The lifting cylinder 30b of the fixing device 7 is connected to one end of a second coupling element 51, the other end of which is connected to the latching head 49. Correspondingly, the bases 43 of the fixing device 6 are connected to one end of the third coupling element 52 with another end opposite the one end being connected to the frame base 3d. One end of a fourth coupling element 53 is also connected to the frame base 3d with another end of the fourth coupling element lying opposite the one end being connected to the lifting cylinder 30B of the unlocking lift device 30 of the fixing device 6. As an alternative to this, each of the fixing devices 6, 7 can also be connected to one or the other end of the lift device 5 via just one coupling element. The two fixing devices 6, 7 each unlock and lock in order to move or brake or fix the cantilever construction device 2 (not shown). Via the fixing rail 40, which is connected to the rail 4b by means of the connecting component 41 or a plurality of connecting components 41, the fixing apparatuses 6, 7 can each develop their fixing/braking/or supporting effect at each of the two ends of the lift device 5 relative to the rail 4b.
(55) The features of the invention described with reference to the illustrated embodiment, such as the manual lift device of the first fixing device 6 in FIG. 4a, 4b, can also be present in other embodiments of the invention, such as the hydraulic lift device of the first fixing device 6 in FIG. 5a, 5b, in such a way that the first fixing device comprises both a manual and a hydraulic lift device unless otherwise stated or impossible for technical reasons.
LIST OF REFERENCE SIGNS
(56) 1 Bridge 1a Bridge surface 1b Bridge hollow box 2 Cantilever construction device 3, 3 Main frame 3 Upper support arrangement 3 Lower support arrangement 3a-3c, 3a-3c Strut 3d, 3d Frame base 3dA, 3dA1 Displacement of the cantilever construction device Q1, Q2, Q3 Cross strut 4a, 4b, 4a, 4b Rail 4a1, 4b1-4b4 Rail recess 4b Wide rail recess 4bP Rail marking 5, 5 Lift device 5a Piston 5b Lifting cylinder 6 First fixing device 6a, 6b First fixing component 6a1, 6b1 Base plate 6a2, 6b2 Holding plate 6a3, 6b3, 7a3 First guide plate 6a4, 6b4 Second guide plate 6a5, 6b5, 7b5 Latching/snap-in element 6b Wide pawl 6b Wide base plate recess 6b Wide holding plate recess 6a3 First guide plate recess 6P, 6P1, 6P2 Position of the first fixing device relative to the rail 6A, 6A1, 6A2 Displacement position of the first fixing device relative to the rail 7 Second fixing device 7a, 7b Second fixing component 7a3 First guide plate 7P, P2, 7P3 Position of the second fixing device relative to the rail 7A, 7A2, 7A3 Displacement position of the second fixing device relative to the rail 8 Web 9 First connecting element 10 First connecting plate1 11 Second connecting plates 12 Bolt 13 Locking pin 14 Third connecting plates 15 Second connecting element 16 Through hole 18 Clamp 18 Position of the clamp relative to the web 19 Clamp recess 19, 19 Guide means 20 Toggle lever 21a, 21b Lifting cylinder of the lift device 22a, 22b Base plate mount 23a, 23b Second flange of the lift device 24a, 24b First flange of the lift device 25a Through hole of the base plate mount 26 Fixing layer 26L1 Air gap in the unlocking position 26L2 Air gap in the locking position 27 Elastic means housing 28 Elastic means 28A Elastic means depth 29 Pretensioning means 29S Pretensioning fixing means 30 Unlocking lift device 30a Piston of the unlocking lift device 30b Lifting cylinder of the unlocking lift device 31 Unlocking lift device port 32 Counterpressure arm 33 Counterpressure fixing layer 34 Guide housing 35 Pressure source 36 Directional control valve 36A First connecting line 36B Second connecting line 36A1 First changeover valve line 36B1 Second changeover valve line 36A2 First lift device line 36B2 Second lift device line 37 Shuttle valve 37A First lift device line 37B Second lift device line 40 Fixing rail 40A Fixing rail axis 40F Braking force direction 41 Connecting component 42 Latching device 43 Base 44 Connecting web 45 Release element 46 Fixing element 46F Direction of the fixing force 46V Fixing element projection 47 Elastic means frame 47V Elastic means frame projection 48 Counterpressure element 48A Gap between the counterpressure element and the elastic means frame 49 Latching head 50 First coupling element 51 Second coupling element 52 Third coupling element 53 Fourth coupling element A First lift device port B Second lift device port P Pressure port PE Unlocking position PV Locking position PA Distance between unlocking and locking position R1 Forward direction of the cantilever construction device T Tank port V1 First branch point V2 Second branch point
