Abstract
A method and a climbing device for lowering a climbing rail, i.e. for climbing downwards. The climbing rail, which is placed on a climbing head by means of an upper protrusion, is lowered in that a climbing cylinder is retracted. The climbing cylinder can be spaced from the climbing rail by completely retracting the climbing cylinder at the upper end by means of a distancing device prior to extending the climbing cylinder again. Thus, the climbing cylinder can be extended again without the climbing rail engaging or hooking below the climbing head at the now central protrusion in that the distancing device moves the climbing head around the central protrusion.
Claims
1. A climbing device for lowering a climbing rail, the climbing device comprising the following: a) a climbing cylinder, which can be supported at a lower end on an anchoring point, b) a climbing head, which is arranged or formed on an upper end of the climbing cylinder, an upper projection of the climbing rail capable of being supported on the climbing head; wherein the climbing device comprises the following: c) a spacer device, which i. is activated when the climbing cylinder is retracted in order to move the climbing head away from the climbing rail when the climbing cylinder is extended such that the climbing head can fit to a central projection of the climbing rail and ii. is deactivated when the climbing cylinder is extended such that the climbing head can engage under the upper projection when the climbing cylinder is extended, wherein the spacer device is designed to be pushed away from the central projection of the climbing rail when the climbing cylinder is extended.
2. The climbing device according to claim 1, wherein the spacer device is designed to be activated when the climbing cylinder is retracted, in order to move the climbing head away from the central projection when the climbing cylinder is subsequently extended.
3. The climbing device according to claim 1, wherein the spacer device is arranged on the climbing head.
4. The climbing device according to claim 1, wherein the spacer device comprises a pivotable rocker.
5. The climbing device according to claim 4, wherein the rocker can pivot outwards at a lower end when the climbing cylinder retracts by the rocker pivoting from an inwardly pivoted position into an outwardly pivoted position and the spacer device being activated thereby.
6. The climbing device according to claim 1, wherein the climbing device comprises a climbing shoe that can be mounted on a solid wall to guide the climbing rail, the climbing shoe comprising a detent on which a lower projection of the climbing rail can be supported, the detent being movable from an extended position in which the lower projection can be supported on the detent into a retracted position in which the lower projection cannot be supported on the detent, the climbing device comprising a blocking device designed to hold the detent in the retracted position.
7. The climbing device according to claim 6, wherein the climbing device comprises a mechanical actuating means that is longer than 1 m in order to adjust the blocking device.
8. The climbing device according to claim 6, wherein the climbing cylinder is pivotally arranged at the lower end on the anchoring point.
9. The climbing device according to claim 7, wherein the mechanical actuating means is in the form of a mechanical traction means.
10. The climbing device according to claim 6, wherein the climbing shoe comprises a tongue and a deflected portion, the tongue being extended and retracted by means of the deflected portion when the detent retracts and extends, the blocking device being designed to block the movement of the tongue.
11. The climbing device according to claim 6, wherein the blocking device is in the form of an eccentric, the eccentric capable of being releasably locked in a blocking position and the detent being prevented from extending in the blocking position.
12. The climbing device according to claim 6, wherein, for unlocking the blocking device, the blocking device comprises a lever that is arranged on the climbing shoe below the contact surface of the detent for the projections of the climbing rail.
13. The climbing device according to claim 12, wherein the blocking device comprises a toggle joint that is blocked in a compressed position when the detent is almost fully extended in order to hold the detent in the almost fully extended position, it being possible to release the blocking of the toggle joint by loading when the climbing rail comes to rest on the detent by means of a projection of the climbing rail by the toggle joint being moved into its elongated position, and it being possible to bring about the blocking of the toggle joint by actuating the lever by means of a projection of the climbing rail.
14. The climbing device according to claim 13, wherein an articulated arm of the toggle joint comprises a slot in which a blocking projection on an additional articulated arm of the toggle joint is guided.
15. The climbing device according to claim 13, wherein an articulated arm of the toggle joint is in the form of a rocker, which comprises a lever at one end and is connected to an additional articulated arm of the toggle joint at the other end.
16. The climbing device according to claim 13, wherein an articulated arm is arranged such that its longitudinal axis (L) deviates from the vertical and/or is spring-loaded, in order to move into the released position of the toggle joint when the detent is fully extended.
17. The climbing device according to claim 6, wherein the blocking device comprises a push-push mechanism that is connected to the detent, holds the detent in an almost fully retracted position during a first retraction, and is released into the fully retracted position by a lever during a second retraction, such that the detent extends.
18. The climbing device according to claim 17, wherein the blocking device comprises a spring-loaded freewheel, by means of which the lever is connected to the detent, the freewheel not transferring actuation of the lever downwards to the detent by means of a projection of the climbing rail, but transferring actuation of the lever upwards to the detent.
19. The climbing device according to claim 1, wherein the climbing device comprises the climbing rail.
20. A method for lowering a climbing rail using a climbing device according to claim 1, wherein the method further comprises: B) extending the climbing cylinder and, in the process, moving the climbing head away from the climbing rail by means of the activated spacer device.
21. The method according to claim 20, wherein the method comprises: A) supporting the climbing rail on a detent of the climbing shoe by means of its lower projection; B) extending the climbing cylinder and, in the process, moving the climbing head away from the central projection of the climbing rail by means of the activated spacer device; C) deactivating the spacer device and raising the climbing rail by engagement under the upper projection of the climbing rail; D) retracting the detent; E) retracting the climbing cylinder and thereby lowering the climbing rail; F) extending the detent and lowering the climbing rail by means of the lower projection on the detent.
22. The method according to claim 21, wherein the retraction of the detent during one of retraction of the detent during step D), and/or the extension of the detent during step F) is carried out by actuating an actuating means.
23. The method according to claim 21, wherein the detent is extended by actuating a lever.
24. The method according to claim 23, wherein the detent is held in an almost fully extended position by a toggle joint and lowering the climbing rail onto the detent releases the toggle joint.
25. The method according to claim 23, wherein the detent is held in an almost fully retracted position by a push-push mechanism during retraction, and the detent being actuated again by the lever releases a blocking of the push-push mechanism and fully extends the detent.
26. A climbing device for lowering a climbing rail, the climbing device comprising: a climbing cylinder having an upper end and a lower end, the climbing cylinder configured to be supported at the lower end by an anchoring point; a climbing head arranged or formed on the upper and of the climbing cylinder, the climbing head configured to support an upper projection of the climbing rail; a spacer device configured to be: activated when the climbing cylinder is retracted in order to move the climbing head away from the climbing rail when the climbing cylinder is extended such that the climbing head can engage with a central projection of the climbing rail, and deactivated and pushed away from the central projection when the climbing cylinder is extended such that the climbing head can engage the upper projection when the climbing cylinder is extended.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
(1) In the drawings:
(2) FIG. 1 is a sectional view of a climbing device with an extended climbing cylinder;
(3) FIG. 2 is a sectional view of the climbing device according to FIG. 1 with a climbing shoe comprising a retracted detent;
(4) FIG. 3 is a sectional view of the climbing device according to FIG. 2 with a partially retracted climbing cylinder and an extended latch;
(5) FIG. 4 is a sectional view of the climbing device according to FIG. 3 with a retracted climbing cylinder;
(6) FIG. 5 is an isometric view of the upper part of the climbing cylinder with a climbing head fastened thereto and a deactivated spacer device;
(7) FIG. 6 is a partial side view of the climbing device during extension of the climbing cylinder, with an activated spacer device;
(8) FIG. 7 is a partial side view of the climbing device according to FIG. 6 with a climbing cylinder extended further;
(9) FIG. 8 is a partial side view of the climbing device according to FIG. 7 with a climbing cylinder extended further;
(10) FIG. 9 is a sectional view of the climbing device according to FIG. 8 with a climbing cylinder extended further;
(11) FIG. 10 is a side view of the climbing device with a fully extended climbing cylinder corresponding to FIG. 1;
(12) FIG. 11 is a partial side view of the climbing device in a special mode, before the climbing rail is raised;
(13) FIG. 12 is a partial side view of the climbing device in a special mode according to FIG. 11, while the climbing rail is being raised;
(14) FIG. 13 is an isometric view of the climbing shoe with an extended detent and a blocking device in the released position;
(15) FIG. 14 is an isometric view of the climbing shoe according to FIG. 13 with a retracted detent and the blocking device in the blocking position;
(16) FIG. 15 is an isometric view of the climbing shoe according to FIG. 14 with a retracted detent and the blocking device in the blocking position;
(17) FIG. 16 is an isometric view of the individual parts of the blocking device according to FIGS. 13 and 14;
(18) FIG. 17a is a partial sectional side view of another climbing shoe with a detent in the almost fully extended position;
(19) FIG. 17b is a partial sectional side view of the climbing shoe according to FIG. 17a with the detent in the fully extended position;
(20) FIG. 17c is a partial sectional side view of the climbing shoe according to FIG. 17b with the detent in the fully retracted position;
(21) FIG. 17d is a partial sectional side view of the climbing shoe according to FIG. 17c once the detent has been extended again into the almost fully extended position;
(22) FIG. 18a is an isometric view of another climbing shoe;
(23) FIG. 18b is a partial sectional side view of the climbing shoe according to FIG. 18a with a detent in the fully extended position;
(24) FIG. 18c is a partial sectional side view of the climbing shoe according to FIG. 18b with a detent in the almost fully retracted position; and
(25) FIG. 18d is a partial sectional side view of the climbing shoe according to FIG. 18c with the detent in the fully retracted position.
DETAILED DESCRIPTION
(26) FIGS. 1 to 10 show a climbing rail being lowered, FIGS. 11 and 12 show the climbing rail being manual raised in a special mode, and FIGS. 13 to 16 show details for actuating a climbing shoe.
(27) FIG. 1 shows a climbing device 10 comprising a climbing shoe 12, which is mounted on a solid wall 14. The climbing device 10 comprises a climbing rail 16. A platform and/or a protective wall (neither are shown) may be arranged or formed on the climbing rail 16.
(28) Once the solid wall 14 has been demolished above the portion of the climbing rail 16 shown, the climbing rail 16 is intended to be lowered in a simple manner, i.e. to climb downwards.
(29) FIG. 2 shows the climbing device 10, and it is clear from FIG. 2 that the weight of the climbing rail 16 is borne by a climbing head 18 that is mounted on a climbing cylinder 20. Said climbing head 18 comprises a hook 22, which engages under an upper projection 24 of the climbing rail 16. The climbing rail 16 comprises a plurality of projections, with an upper projection 24, a central projection 26, a lower projection 28 and an additional projection 29 (see also FIG. 1) being provided with a reference sign in FIG. 2. The projections 24, 26, 28, 29 are preferably identical. The projections 24, 26, 28, 29 are in particular arranged or formed so as to be equidistant from one another. The projections 24, 26, 28, 29 may each be in the form of a supporting pin. A hook-shaped detent 30 of the climbing shoe 12 is retracted to allow the climbing cylinder 20 to be retracted without the projections 24, 26, 28, 29 resting on the detent 30. During the work, the climbing rail 16 has been supported on the wall 14 by the detent 30 of the climbing shoe 12 by means of the additional projection 29. The detent 30 can only be retracted if, as shown in FIG. 2, the detent 30 is positioned so as to be free of any load, i.e. the projection 24, 26, 28, 29 has to be far enough away from the detent 30 that it can be pivoted from the extended position into the retracted position without any disturbance or contact.
(30) FIG. 3 shows the climbing device 10 with the climbing cylinder 20 partially retracted. The detent 30 has been extended such that lower projection 28 can rest on the detent 30 when the climbing cylinder 20 is retracted further and the climbing rail 16 is lowered further as a result.
(31) FIG. 4 shows the climbing device 10 with the climbing cylinder 20 retracted. The weight of the climbing rail 16 is borne by the lower projection 28 on the detent 30, such that the climbing head 18 can move transversely to the longitudinal axis of the climbing rail 16. The climbing head 18 is no longer hooked under the upper projection 24 or the now central projection 26.
(32) FIG. 5 shows the climbing device 10 with the climbing cylinder 20 and the climbing head 18. The hook 22 for engaging under a projection 24, 26, 28, 29 (see FIG. 2) is formed on the climbing head 18. A guide portion 32, which is in the form of a metal guide sheet here, prevents the climbing head 18 from becoming inserted too deep into the climbing rail 16 (see FIG. 4). The climbing head 18 also comprises a guide piece 33 (see also FIG. 4), which centers the climbing head 18 in the climbing rail 16 (see FIG. 4), in particular by means of sloping side faces.
(33) In order to further lower the climbing rail 16 from the position shown in FIG. 4 in a subsequent cycle, the climbing cylinder 20 has to be extended again. Here, the climbing head 18 would, however, engage under the central projection 26 (see FIG. 4) again. To prevent this, the climbing head 18 comprises a spacer device 34. The spacer device 34 comprises a first bracket 36a and a second bracket 36b, which is not fully visible in FIG. 5. The brackets 36a, 36b form a rocker 37 of the spacer device 34. The brackets 36a, 36b are identical and are arranged on a rotary pin 38 (see also FIG. 4) of the spacer device 34 for conjoint rotation. The brackets 36a, 36b are angled, i.e. they have an L-shaped basic form. The brackets 36a, 36b comprise a contact surface 40 for the projections 24, 26, 28, 29 (see FIG. 2) at one end and a protrusion 42 at the other end. The contact surface 40 is in particular in the form of a quadrant-shaped indentation.
(34) When the climbing cylinder 20 is retracted, the protrusion 42 abuts an upper face 44 of the cylinder tube of the climbing cylinder 20 when viewed in the vertical direction. As a result, the brackets 36a, 36b are pivoted when the climbing cylinder 20 is retracted (in the view according to FIG. 5, in the clockwise direction). This pivoting action takes place about the rotary pin 38 against the resistance of a spring element 46. By means of this pivoting action, the spacer device 34 is moved from the deactivated position, as shown in FIG. 5, into the activated position.
(35) FIG. 6 shows the climbing head 18 of the climbing device 10 having been spaced from the climbing rail 16 by the distance A1 when the climbing cylinder 20 is retracted. The spacer device 34 is in the activated position.
(36) The rotary pin 38 is spaced from the now central projection 26 on the lever arm 47 by the lever length L1. Since the lever length L1 perpendicular to the longitudinal axis of the climbing rail 16 is greater than 0, the climbing head 18 bypasses the central projection 26 when the climbing cylinder 20 is extended.
(37) FIG. 7 shows the climbing device 10 with the climbing cylinder 20 extended further. A tab 48 prevents the spacer device 34 from prematurely pivoting back into the deactivated position. The tab 48 rests on the central projection 26 and blocks the lever arm 47 from pivoting back until the rotary pin 38 has definitely passed by the central projection 26 vertically, such that the hook 22 (see also FIG. 5) has also safely passed by the central projection 26. While the climbing cylinder 20 is being extended, the surface pressure between the contact surface 40 (see FIG. 5) and the projection 24, 26, 28, 29 is sufficient to prevent movement of the spacer device 34, in particular to prevent the spacer device 34 from pivoting back. The tab 48 is therefore not strictly necessary in the embodiment shown.
(38) FIG. 8 shows the climbing device 10 when the climbing cylinder 20 is extended further, the spacer device 34 spacing the climbing head 18 further and further from the climbing rail 16 until the rotary pin 38, as shown in FIG. 8, is substantially at the level of the central projection 26.
(39) FIG. 9 shows the climbing device 10 with the climbing cylinder 20 extended further. A climbing-cylinder spring element 49 which pivots the climbing cylinder 20 towards the climbing rail 16 is arranged between the climbing cylinder 20 and the climbing shoe 12. When FIGS. 4, 6 to 8 and 9 are considered together, it is clear that the climbing head 18 can bypass the central projection 26 in an arc-shaped manner when the climbing cylinder 20 is extended.
(40) Reference sign 49 in FIG. 9 also denotes an anchoring point of the climbing cylinder 20. In the present case, the anchoring point is formed in the climbing shoe 12, in particular on an upper face of the climbing shoe 12.
(41) FIG. 10 shows the climbing device 10 with the climbing cylinder 20 extended. The spacer device 34 is in the deactivated position. An outer end 50 of the rocker 37 is positioned on the side of the rotary pin 38 that is remote from the upper projection 24. An inner end 52 of the rocker 37 or the protrusion 42 no longer rests on the upper face 44 of the cylinder tube. As a result, the hook 22 of the climbing head 18 can engage under the upper projection 24 in an unimpeded manner. If the climbing cylinder 20 is retracted again following deactivation and subsequent activation of the detent 30 (see FIGS. 2 and 3) of the climbing shoe 12, the climbing rail 16 can be lowered again in another cycle (see FIG. 1 et seq.).
(42) FIGS. 11 and 12 show how the climbing rail 16 can be made to climb upwards manually.
(43) FIG. 11 shows the climbing device 10, with the spacer device 34 being manually pivoted far enough that the outer end 50 of the rocker 37 can engage under the central projection 26. Here, the inner end 52 is spaced from the cylinder head 44 despite the climbing cylinder 20 being retracted. According to the position in FIG. 11, the spacer device 34 has thus been manually deactivated for the climbing rail 16 to be able to climb upwards in an exceptional situation.
(44) FIG. 12 shows how the climbing cylinder 20 of the climbing device 10 is then pivoted towards the climbing rail 16 by the climbing-cylinder spring element 49 (see FIG. 9) while the spacer device 34 is manually held in the position shown, such that the hook 22 engages under the central projection 26 and the extension of the climbing cylinder 20 can cause the climbing rail 16 to be raised.
(45) FIG. 13 shows the lower part of the climbing device 10 with the climbing shoe 12. The climbing shoe 12 comprises arms 54a, 54b for guiding the climbing rail 16 (see FIG. 10). FIG. 13 also shows the extended detent 30, which is in two parts here. A blocking device 56 in the released position allows the detent 30 to extend. The detent 30 is automatically extended by a detent spring element (not shown). This position of the detent 30 is also shown in FIG. 1.
(46) FIG. 14 shows the climbing device 10 with the detent 30 retracted. The blocking device 56 has been moved into the blocking position in this figure. In this blocking position, the detent 30 is blocked from extending. This position of the detent 30 is also shown in FIG. 2. The spring force of the detent spring element (not shown), which is attempting to push the detent 30 outwards, ensures that the blocking device 56 cannot be released by itself, e.g. by vibrations.
(47) FIG. 15 shows the climbing shoe 12 from the side that is remote from the climbing rail 16 (see FIG. 1). The climbing shoe 12 comprises a deflected portion 58, which connects the detent 30 (see FIG. 13) to a tongue 60. A movement of the tongue 60 causes a movement of the detent 30, by means of the deflected portion 58. The tongue 60 comprises a tongue cut-out 62.
(48) FIG. 16 shows the blocking device 56. It is clear from FIG. 16 that the blocking device 56 is formed in two parts and is eccentric-shaped. The blocking device 56 is pivotally arranged on the tongue 60 (see FIG. 15) by means of a screw 64, a rivet, a pin or the like. In order for it to be possible to use the existing tongue cut-out 62, a reducer 66 is provided. The inserted reducer 66 is shown in FIG. 15.
(49) An actuating means 68 in the form of two cables 70, 72 is provided on the blocking device 56. The mechanical actuating means 68 makes it possible to remotely actuate the blocking device 56. The cables 70, 72 for controlling the blocking device 56 are accordingly shown in FIGS. 13 and 14.
(50) For reasons of clarity, the blocking device 56 and the actuating means 68 are not shown in FIGS. 1 to 4 and 9.
(51) FIG. 17a shows a climbing device 10 comprising a climbing shoe 12 for guiding a climbing rail 16. The climbing shoe 12 is mounted on a solid wall (not shown) on the side thereof that is remote from the climbing rail 16. A lower projection 28 of the climbing rail 16 is positioned above a detent 30. The detent 30 is urged to retract by a detent spring element 74 under spring force. In FIG. 17a, the detent 30 is in the almost fully extended position. A blocking device 56 prevents the detent 30 from retracting. The blocking device 56 comprises a toggle joint 76 comprising articulated arms 78a, 78b. In the position shown in FIG. 17a, the toggle joint 76 is in its compressed position, in which it blocks the detent 30 from extending.
(52) FIG. 17b shows the climbing device 10, the weight of the climbing rail 16 being borne by the lower projection 28 on the detent 30. In this position, the detent 30 prevents the climbing rail 16 from being lowered further. By means of the pivoting of the detent 30 into the fully extended position that is shown, the toggle joint 76 is guided out of its blocking compressed position. Here, the articulated arm 78a comprises a slot 80, in which a blocking projection 82 of the articulated arm 78b is guided with play. The play of the blocking projection 82 is in particular in the longitudinal direction L of the articulated arm 78a in this case. The longitudinal direction L of the articulated arm 78a extends at an angle or obliquely to the vertical, such that the lower end of the articulated arm 78a is urged to move towards the vertical. This is not possible in the compressed position according to FIG. 17a. Once the detent 30 is fully extended, as shown in FIG. 17b, the lower end of the (upper) articulated arm 78a can move towards the vertical and the blocking by the blocking device 56 can be released. The detent 30 could now retract in principle, but is prevented therefrom by the weight of the climbing rail 16.
(53) FIG. 17c shows the climbing device 10, with the climbing rail 16 having been slightly raised and then lowered such that the detent 30 was able to retract. The climbing rail 16 can thus be made to climb downwards. In the process, the detent 30 is prevented from becoming stuck in the retracted position by means of a lever 84. The lever 84 in particular forms a rocker 86 together with the articulated arm 78b. If the lever 84 is actuated downwards by means of the lower projection 28, the detent 30, which is connected to the lever 84, extends again.
(54) FIG. 17d shows the climbing device 10 with the detent 30 in the extended position. The toggle joint 76 is once again in the compressed position that blocks the detent 30. The method can then continued again analogously to FIGS. 17a to 17d in order to further lower the climbing rail 16.
(55) The embodiment of the climbing shoe 12 according to FIG. 17a-17d thus makes it possible to lower the climbing rail 16 projection by projection, without the climbing shoe 12 needing to be actuated itself.
(56) FIG. 18a shows another embodiment of a climbing device 10 comprising a climbing shoe 12. The climbing shoe 12 comprises a retractable and extendable detent 30. The climbing rail is not shown. This is designed as in the embodiment in FIG. 17a-17d.
(57) FIG. 18b shows the climbing device 10 with the detent 30 extended. The detent 30 is connected to a push-push mechanism 88 for controlling the detent 30. a detent spring element 74 urges the detent 30 under spring force in order to extend said detent 30. In the position shown in FIG. 18b, the detent 30 thus prevents the climbing rail from being lowered, since the projections of the climbing rail would rest on the detent 30. In order to retract the detent 30, the climbing rail is raised such that a projection of the climbing rail pushes the detent 30 inwards.
(58) FIG. 18c shows the fully retracted detent 30 of the climbing device 10. The push-push mechanism 88 holds the detent 30 in the almost fully retracted position. The push-push mechanism 88 thus forms part of a blocking device 56. With the detent 30 almost fully retracted, the climbing rail can be lowered as far as desired. In the process, the projections of the climbing rail pass by a lever 84. The lever 84 is connected to the detent 30 by a freewheel 90, which allows the lever 84 to spring downwards without actuating the detent 30. If the detent 30 is intended to be extended again, the lever 84 can be actuated upwards. This movement is not unblocked by the freewheel 90.
(59) FIG. 18d shows the climbing device 10 when the lever 84 is actuated upwards. The push-push mechanism 88 is unlatched by the in particular fully retracted detent 30 and the detent 30 can extend again.
(60) The embodiment of the climbing shoe 12 shown in FIG. 18a-18d allows a climbing rail to be lowered as far as desired when the detent 30 is being held in the almost fully retracted position by the push-push mechanism 88. Moving the detent spring element 74 from a position in which the detent spring element 74 is attempting to move the detent 30 for the purpose of extension into a position in which the detent spring element 74 is attempting to move the detent 30 for the purpose of retraction does not need to be carried out. Instead, the detent spring element 74 can constantly move the detent 30 for the purpose of extension, meaning that the safety and ease of use of the climbing shoe 12 is increased.
(61) When considering all the figures of the drawings together, in summary the invention relates to a method and to a climbing device 10 for lowering a climbing rail 16, i.e. for making said rail climb downwards. In the method, the climbing rail 16 that rests on a climbing head 18 by an upper projection 24 is lowered by a climbing cylinder 20 being retracted. In particular, before the climbing cylinder 20 is extended again, it can be spaced from the climbing rail 16 at the upper end by means of a spacer device 34 by the climbing cylinder 20 being fully retracted. As a result, the climbing cylinder 20 can be extended again without the climbing rail 16, together with the climbing head 18, engaging or hooking under the now central projection 26, by the spacer device 34 moving the climbing head 18 around the central projection 26. In this process, the spacer device 34 is activated in the retracted position of the climbing cylinder 20 in order to bypass a projection 24, 26, 28, 29 of the climbing rail 16 and is deactivated in the extended position of the climbing cylinder 20 in order to engage under a projection 24, 26, 28, 29 of the climbing rail 16 by means of a hook 22 of the climbing head 18. The climbing cylinder 20 preferably projects at the lower end from a climbing shoe 12, the detent 30 of which can be indirectly or directly released and blocked by means of a mechanical actuating means 68. The detent 30 of the climbing shoe 12 may alternatively or additionally be reversibly detachably held by a blocking device 56 in the form of a toggle joint 76 and/or a push-push mechanism 88. Preferably, lever 84 that can be actuated by a projection 24, 26, 28, 29 is provided in order for the detent 30 to be extended again in a manner actuated by a projection 24, 26, 28, 29.
