Ejecting device for a folding door

Abstract

An ejecting device for a folding door is movably arranged on a furniture body. First and second door leaves of the folding door are interconnected in an articulated manner. The ejecting device has an ejecting element for folding open the folding door from a closed position, in which the door leaves are in a common closed plane, into an open position, in which the door leaves form an angle not equal to 180°. The ejecting device has a first fitting part for mounting the ejecting device on the first door leaf. The ejecting element can move the second door leaf from the closed position into the open position by a scissor mechanism having at least two scissor levers, and is mounted between the first and second door leaves by an articulated connection formed by an intermediate lever connected in an articulated manner to the first and/or second scissor lever.

Claims

1. An ejecting device for a folding door arranged moveably on a furniture carcass, wherein the folding door includes a first door leaf and a second door leaf that are hingedly connected together, the ejecting device comprising: an ejecting element for unfolding the folding door from a closed position, in which the first and second door leaves are arranged in a common closing plane, into an open position in which the first and second door leaves include an angle not equal to 180° relative to each other; and a first fitment for mounting the ejecting device to the first door leaf, the ejecting element being supported at the first fitment, wherein the ejecting element is adapted to move the second door leaf from the closed position into the open position by a scissor mechanism, wherein the scissor mechanism has a first scissor lever and a second scissor lever, and is mounted by way of a hinged connection such that the scissor mechanism can be folded together between the first and second door leaves, wherein the hinged connection is formed by an intermediate lever hingedly connected to the first scissor lever and the second scissor lever, wherein a force storage means is arranged at the scissor mechanism and is configured to assist movement of the scissor mechanism as soon as the folding door is moved out of the closed position into the open position, and wherein the second scissor lever has a contact portion which can be pressed against a control cam arranged on the first fitment by action of the force storage means, the contact portion being displaceable along the control cam.

2. The ejecting device as set forth in claim 1, wherein the first and the second scissor levers are connected together in a central region by way of the hinged connection.

3. The ejecting device as set forth in claim 1, wherein the first scissor lever is mounted at a first end displaceably along a guide device on the first fitment, and a second end of the first scissor lever is hingedly connected to a second fitment.

4. The ejecting device as set forth in claim 1, wherein a pivotal movement of the second scissor lever can be produced by contact between the contact portion and the control cam, wherein by virtue of the pivotal movement of the second scissor lever, the first scissor lever can also be displaced based on the hinged connection between the first and second scissor levers.

5. The ejecting device as set forth in claim 1, wherein the force storage means is arranged between the first and second scissor levers, or between the intermediate lever and one of the first and second scissor levers, in working relationship on the first fitment.

6. The ejecting device as set forth in claim 1, wherein the force storage means is formed by a spring.

7. The ejecting device as set forth in claim 6, wherein the spring is a compression spring.

8. The ejecting device as set forth in claim 1, wherein the force storage means is mounted to an end portion of the second scissor lever and urges the contact portion mounted moveably on the second scissor lever in a direction opposite to the end portion.

9. The ejecting device as set forth in claim 8, wherein the contact portion is mounted slidably on the second scissor lever.

10. An article of furniture comprising: a furniture carcass; a folding door which includes first and second door leaves hingedly connected together, wherein the folding door can assume a closed position in which the first and second door leaves are arranged in a common closing plane and an open position in which the first and second door leaves include an angle not equal to 180° relative to each other; and the ejecting device as set forth in claim 1.

11. The article of furniture as set forth in claim 10, wherein the ejecting device is arranged at a side, towards the furniture carcass, of one of the first and second door leaves.

12. The article of furniture as set forth in claim 10, wherein the furniture carcass has a retraction compartment provided by a cavity for receiving the folding door in a folded-together retraction position.

13. An ejecting device for a folding door arranged moveably on a furniture carcass, wherein the folding door includes a first door leaf and a second door leaf that are hingedly connected together, the ejecting device comprising: an ejecting element for unfolding the folding door from a closed position, in which the first and second door leaves are arranged in a common closing plane, into an open position in which the first and second door leaves include an angle not equal to 180° relative to each other, and a first fitment for mounting the ejecting device to the first door leaf, the ejecting element being supported at the first fitment, wherein the ejecting element is adapted to move the second door leaf from the closed position into the open position by a scissor mechanism, wherein the scissor mechanism has a first scissor lever and a second scissor lever, and is mounted by way of a hinged connection such that the scissor mechanism can be folded together between the first and second door leaves, wherein the hinged connection is formed by an intermediate lever hingedly connected to the first scissor lever and the second scissor lever, wherein the second scissor lever has a contact portion which can be brought into contact with a control cam arranged on the first fitment, wherein the control cam has an opening portion and a stressing portion, and wherein the contact portion is displaceable along the opening portion and the stressing portion of the control cam.

14. The ejecting device as set forth in claim 13, wherein the contact portion is provided by a rolling body mounted rotatably on the second scissor lever.

15. An ejecting device for a folding door arranged moveably on a furniture carcass, wherein the folding door includes a first door leaf and a second door leaf that are hingedly connected together, the ejecting device comprising: an ejecting element for unfolding the folding door from a closed position, in which the first and second door leaves are arranged in a common closing plane, into an open position in which the first and second door leaves include an angle not equal to 180° relative to each other; and a first fitment for mounting the ejecting device to the first door leaf, the ejecting element being supported at the first fitment, wherein the ejecting element is adapted to move the second door leaf from the closed position into the open position by a scissor mechanism, wherein the scissor mechanism has a first scissor lever and a second scissor lever, and is mounted by way of a hinged connection such that the scissor mechanism can be folded together between the first and second door leaves, wherein the hinged connection is formed by an intermediate lever hingedly connected to the first scissor lever and the second scissor lever, wherein a force storage means is arranged at the scissor mechanism and is configured to assist movement of the scissor mechanism as soon as the folding door is moved out of the closed position into the open position, wherein the second scissor lever has a contact portion which can be brought into contact with a control cam arranged on the first fitment, wherein the ejecting device further comprises a locking device for locking the force storage means, and wherein the force storage means can be loaded by cooperation of the control cam and the contact portion, and the force storage means can be locked in a loaded state by the locking device, whereby unloading of the force storage means can be prevented.

16. The ejecting device as set forth in claim 15, further comprising a release device which in a release position unlocks the locking device so that the force storage means can be changed from the loaded state to an unloaded state.

17. The ejecting device as set forth in claim 16, wherein the release device, upon pressing of the release device, is moveable from a substantially coplanar position of the first and second door leaves into the release position.

18. The ejecting device as set forth in claim 17, wherein the release device, upon pressing of the release device against the furniture carcass, is moveable into the release position.

19. The ejecting device as set forth in claim 15, wherein when the ejecting device is mounted to the first door leaf, the locking device is unlockable by application of pressure to the folding door.

20. The ejecting device as set forth in claim 19, wherein when the ejecting device is mounted to the first door leaf, the locking device is unlockable by application of pressure to the folding door in a region in which the first and second door leaves are hingedly connected together.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Further details and advantages of the present invention are described more fully hereinafter by means of the specific description with reference to the embodiments by way of example illustrated in the drawings in which:

(2) FIG. 1a shows an article of furniture with a retraction compartment and a folding door,

(3) FIG. 1b shows an ejecting device on the folding door,

(4) FIG. 2 is an exploded view of the ejecting device,

(5) FIGS. 3a and 3b show the closed position of the folding door,

(6) FIGS. 4-7 show different views and positions of the ejecting device upon unloading of the at least one force storage means and displacement in the direction of the open position,

(7) FIGS. 8-11 show different views and positions of the ejecting device upon loading of the at least one force storage means and displacement in the direction of the open position, and

(8) FIGS. 12-15 show different views and positions of the ejecting device in the return movement in the direction of the closed position.

DETAILED DESCRIPTION OF THE INVENTION

(9) FIG. 1a shows the article of furniture 100 with a retraction compartment 33 which is arranged laterally on the article of furniture 100 and in which the folding door 3 can be stowed by being pushed therein with the door leaves 3a, 3b in the folded-together state. FIG. 1a shows the closed position of the folding door 3. The folding door 3 can also be in the form of a folding-sliding door, as shown in FIG. 1a. For that purpose it is fastened at the upper edge and/or the lower edge of the folding door 3 by a longitudinal guide (not visible in FIG. 1a). Besides the ejecting device 1 at the door gap between the door leaves 3a, 3b hinges 50 are also arranged at the gap in order to permit pivotal movement of the door leaves 3a, 3b between an open position and a closed position. The retraction compartment 33 is provided by the furniture carcass 40 or is arranged thereon. A part which is not visible of the furniture carcass 40 extends parallel to the ejecting device 1 in order if necessary to make contact with respect to the ejecting device 1. That component part of the furniture carcass 40 can be for example a shelf, a cover panel or another component part of the furniture carcass 40.

(10) FIG. 1b shows the ejecting device 1 of FIG. 1a in detail. The release device 17 which is arranged moveably on the ejecting device 1 comes into contact if required with a component part of the furniture carcass 40. For reasons of simplification the furniture carcass 40 has not been shown in FIG. 1b. The release device 17 is in the form of a contact member which, upon overpressing of the door leaves 3a, 3b from the coplanar position shown in FIG. 1b towards a component part of the furniture carcass, comes into contact with the furniture carcass 40 and thereupon releases same. Accordingly the ejecting device is set in operation and the movement of the door leaves 3a, 3b relative to each other begins. In that case the ejecting device 1 has a first fitment la and a second fitment 1b. The scissor mechanism 10 connects the first and the second fitments 1a, 1b. Upon release by the release device 17 the scissor mechanism 10 is set in motion by at least one force storage means 14, and this results in opening of the door leaves 3a, 3b.

(11) FIG. 2 shows an exploded view of the ejecting device 1 comprising a first fitment 1a and a second fitment 1b. The majority of the individual component parts are disposed on the first fitment 1a. That includes a base element 52 which is connected to the first door leaf 3a by way of fixing portions. It can be connected to the first door leaf 3a for example by way of screws or similar fixing means. For simplification reasons that is not shown in FIG. 2.

(12) Disposed on the base element 52 is at least one guide device 12 for receiving the guide elements 12b which are disposed on the first scissor lever 10a and which are arranged at a first end E1 of the first scissor lever 10a. The second end E2 of that first scissor lever 10a is connected to the second fitment 1b. The guide elements 12b are rotatably connected to the first scissor lever by way of a pin 12a and are displaceable along the guide device 12 on the base element 52.

(13) The first scissor lever 10a is connected to the second scissor lever 10b by way of at least one intermediate lever 11. The second scissor lever has a contact portion 15 which can be brought into contact with the control cam 13 on the base element 52. Accordingly the contact portion 15—in the form of a rolling body—is supported at least at times at the control cam 13. Disposed at the opposite end of the second scissor lever 10b is the mounting 53a which is mounted by way of a bolt 53b at at least one force storage means 14 on the second scissor lever 10b. The force storage means 14 act by way of a displacement device 54 against a carriage 55. The carriage 55 additionally serves to receive the contact portion 15. When the contact portion 15 is moved by the control cam 13 those movements are transmitted by the carriage 55 to the force storage means 14 and vice-versa. The locking device 16 is provided for locking the carriage 55. The device 16 is mounted rotatably to the second scissor lever 10b by way of the bolt 53b. Release or triggering of the locking device 16 is effected by way of the release device 17 which is also mounted moveably to the second scissor lever 10b. In this case a corresponding recess 55b on the locking device 16 is connected by way of a projection 55a.

(14) A push-through prevention arrangement 60 which is operatively connected to a control device 61 prevents premature triggering of the ejecting device 1 occurring. If for example the opening process for opening the door from the closed position to the open position is interrupted by the user and the folding door is pushed back into the coplanar position renewed ejection of the folding door 3 could occur. That is prevented by the arrangement 60 and the control device 61. The prevention arrangement in that case is connected to the carriage 55 and then releases it only as soon as regular opening of the door was intended to take place.

(15) FIG. 3a shows the closed position of the folding door, with the door leaves 3a, 3b being in a coplanar position with respect to each other. The force storage means 14 disposed behind the locking device 16 is stressed. The release device 17 is spaced relative to the furniture carcass 40. The locking device 16 is thus also in the locked state. The force storage means 14 cannot be unloaded. Accordingly the contact portion 15 of the second scissor lever 10b is also at the beginning of the control cam 13. The position of the contact portion 15 relative to the control cam 13 is maintained by virtue of the locked force storage means 14 at the beginning of the opening portion OA. The opening portion OA extends over at least half the travel distance of the control cam 13 and goes into the stressing portion SA.

(16) FIG. 3b shows a view from below of the release device 17 which is in engagement by way of the projection 55b with the corresponding recess 55a. The recess 55a is disposed on the locking device 16. The locking device 16 holds the force storage means 14 in the stressed position.

(17) FIG. 4 shows release of the release device 17. The force FB applied by the user acts against the door leaves 3a, 3b (not shown in FIG. 4). By virtue of overstretching from the coplanar position the release device 17 is pressed against a component part of the furniture carcass 40. A counteracting force FG is produced at the release device 17 by the force of the user FB. Accordingly the extension portion 55b of the release device is pulled out of the recess 55a of the locking device 16. The locking device 16 is now in the unlocked state. As shown in FIG. 4 that can be effected by a component part of the furniture carcass 40.

(18) Also however by for example a direct or indirect connection between the release device 17 and for example the second door leaf 3b or the second fitment 1b. That connection can be for example a tensioned Bowden cable or a similar device which upon overpressing of the door leaves out of the coplanar position effects release of the release device 17. Thus it is not always necessary to implement a direct contact in relation to the furniture carcass 40 to ensure release of the release device 17. There is also the option of effecting release by way of a connection of the release device 17 to a region of the ejecting device 1, that is moveable relative thereto.

(19) FIG. 5 shows an unlocked locking device 16. The force storage means 14 now acts against the contact portion 15, wherein the latter is moved along the opening portion OA of the control cam 13 and the scissor mechanism 10 is also set in motion by the connection in relation to the intermediate lever 11. In that case the second scissor lever 10b moves the first scissor lever 10a by way of the intermediate lever 11 which is fixed at the hinge point G1 on the second scissor lever 10b. The first scissor lever 10a is connected to the guide device 12 at the first fitment 1a by way of a guide element 12b. Accordingly the ejecting device 1 is moved out of the coplanar position in the direction of the open position by way of the force storage means 14, the hinge point G1, the intermediate lever 11 and the first scissor lever 10a. The movement takes place about the axis of rotation 51.

(20) FIG. 6 shows a further position between the closed position and the open position of the ejecting device 1. The force storage means 14 is further unloaded, the second scissor lever 10b moves the first scissor lever 10a along the guide device 12 by way of the first hinge point G1 and the second hinge point G2 and the intermediate lever arranged therebetween. In that case the contact portion 15 moves along the control cam 13. The scissor mechanism 10 is thus supported by the base body 6.

(21) FIG. 7 shows an opening angle of about 90° of the ejecting device 1. For reasons of simplification the first and second door leaves 3a and 3b have not been shown, the angle of these would now also correspond to about 90° relative to each other. The force storage means 14 is further unloaded until the contact portion 15 has arrived at the end of the opening portion OA of the control cam 13. When the contact portion 15 is at the end of the opening portion OA and thus at the transition of the stressing portion SA the force storage means 14 is completely unloaded.

(22) The scissor mechanism 10 thereupon no longer moves further automatically by virtue of the force influence of the force storage means 14. A further movement out of that position into the completely open position of the ejecting device 1 can be effected for example by way of a furniture drive or now also manually by the user.

(23) FIG. 8 shows how the scissor mechanism 10 behaves when the second fitment 1b is further pivoted to load the force storage means 14. Loading of the force storage means 14 is effected by way of the contact portion 15 which is now in the stressing portion SA. The angle between the first fitment 1a and the second fitment 1b is further reduced by a furniture drive or manual actuation by the user. The contact portion 15 is moved along the stressing portion SA at the control cam 13 in positively guided relationship, which leads to stressing of the force storage means 14. In parallel therewith the scissor mechanism 10 can be further displaced in order to move the door leaves 3a, 3b (not shown in FIG. 8 for reasons of simplification) into their open position (parallel position). In that case stressing of the force storage means 14 is effected by way of the carriage 55 connected to the contact portion 15. By virtue of the contact of the contact portion with the control cam 13 the carriage now moves against the adjusting force of the force storage means 14. It is also apparent how the locking device 16 approaches the corresponding locking portion 16b, with the locking portion 16a of the device 16. In this case the locking portion 16a and the corresponding locking portion 16b are afforded by a positively locking connection, for example by a notch with a pin.

(24) FIG. 9 shows how the folding door 3 (not visible in FIG. 9) is moved further in the direction of the open position. The contact portion 15 is shortly before the most strongly pronounced region of the control cam 13 in the stressing portion. The force storage means 14 is thus shortly before its most heavily stressed position. The locking device 16 is shortly before the locking point. The scissor mechanism 10 is further folded together and takes its place between the door leaves 3a, 3b (not visible in the Figure). A small spring 59 in the pivotal region of the locking device 16 urges same as a primary matter into the locking position in order to ensure secure latching as soon as the locking portions 16a, 16b bear over or into each other in positively locking relationship.

(25) FIG. 10 shows the ejecting device 1 shortly before the open position which substantially corresponds to the parallel position of the folding door 3 (not visible in FIG. 10). The contact portion has arrived shortly before the end of the stressing portion SA of the control cam 13. The force storage means 14 is almost completely stressed. By virtue of the fact that the locking device 16 has moved away from the release device 17 along the longitudinal axis of the force storage means no release can now take place in the parallel position of the door leaves 3a, 3b. Accordingly there is no contact of the release device 17 with the locking device 16 in the parallel position of the door leaves 3a, 3b as unlocking of the force storage means 14 in the open position is not wanted.

(26) FIG. 11 shows the parallel position of the folding door 3. The parallel position corresponds to the open position of the folding door 3 in which the first door leaf 3a is disposed relative to the second door leaf 3b substantially in a parallel position. The ejecting device 1 is now disposed in the folded-together state between the door leaves 3a, 3b. In this case the force storage means 14 is completely stressed. The locking device 16 is closed by virtue of the corresponding locking portions 16a, 16b.

(27) By virtue of the removal of the release device 17 in relation to the locking device 16 release is not possible in the open position of the folding door 3. The contact portion 15 is disposed in the end position on the control cam 13. In that open position the folding door can be inserted into the retraction compartment 33 shown in FIG. 1. Such insertion into the retraction compartment 33 can be effected by way of a drive or also by the force of the user. Removal from the retraction compartment 33 can also be effected by way of a drive. Accordingly the folding door 3 moved into the open position is ejected from the retraction compartment 33 and can be moved into the closed position again by way of an additional drive or also manually by the user.

(28) In the movement from the open position into the closed position the ejecting device 1 is virtually in an idle mode and is moved in the stressed state from the open position into the closed position to be able to ensure renewed release. In the entirely folded-together state of the ejecting device 1 the guide element 12b is disposed at the end of the guide device 12.

(29) FIG. 12 shows the ejecting device 1 on pivoting back from the open position into the closed position. In this case the guide element 12b of the first scissor lever 10a is moved along the guide device 12. The scissor mechanism 10 then remains in the folded-together state as it is latched by the locking device 16. The locking device 16 remains closed by way of the locking portions 16a, 16b. The force storage means 14 remains loaded. The contact portion 15 moves away from the control cam 13. There is no contact between the contact portion 15 and the control cam 13.

(30) FIG. 13 shows the ejecting device 1 shortly before the coplanar position (closed position) of the door leaves 3a, 3b. In this case the scissor mechanism 10 is still in the folded-together state. It will be seen that the release device 17 moves closer to the locking device 16 in order to be able to ensure release again in the coplanar position. The contact portion 15 is moved away in spaced relationship with the control cam 13 and does not come into engagement therewith.

(31) FIG. 14 shows the ejecting device 1 in the coplanar position of the folding door 3. It is striking that the release device 17 is not yet in engagement with the locking device 16. Renewed release is therefore not yet possible. That is effected by virtue of the push-through protection arrangement which intended to prevent the door being immediately opened again by the closing movement and by moving beyond the coplanar position. A time delay in respect of engagement of the release device 17 into the locking device 16 is therefore to occur. That is effected by way of the control device 61 which causes time-delayed adjustment of the release device 17. The control device 61 can be for example in the form of a damper, rotary damper or the like. For re-adjustment of the release device 17 that requires longer than the closing movement of the door leaf 3.

(32) FIG. 15 shows how the push-through protection arrangement has been canceled by way of the control device 61. The release device 17 was correspondingly brought into engagement with the locking device 16 in order to be able to ensure fresh release of the ejecting device. Fresh release begins as soon as pushing through beyond the coplanar position of the door leaves 3a, 3b is effected, as shown in FIG. 4.