EP0386731A2 - Retractable device - Google Patents

Abstract

In order to provide a retraction device, which is as simple as possible in design, for an insert which is displaceable in the pulling-out direction from a unit by means of a pulling-out guide mounted in a roller bearing, in which device retraction of the insert into the end position of the insert takes place over a predetermined retraction path without additional operating elements, it is proposed that a connecting part is provided, which is displaceable between a first and a second position in the pulling-out direction and on which an elastic energy store engages, that the storage of the energy is effected by a catch element which engages on the connecting part when the insert is pulled out and moves said connecting part from the first position into the second position, that the connecting part can be fixed in the second position and the catch element as well as the connecting part can be disengaged when the insert is pulled out beyond the retraction path, and that, when the insert reaches the second position while being pushed in, the connecting part can be released and brought into engagement with the catch element for retraction of the insert. <IMAGE>

Description

The invention relates to a pull-in device for a slide-in device that can be moved from a body in the pull-out direction by means of a rolling-element-mounted pull-out guide, comprising an elastic energy store, with the stored elastic energy of which the slide-in device can be moved into a slide-in end position via a pull-in path.

Such a draw-in device is known, for example, from DE-AS 10 17 351, with this draw-in device storing energy in the elastic energy store by means of a motor drive in order to move the drawer into the drawer end position via the draw-in path.

Such a feed device is very complex and expensive to manufacture.

In addition, operation of the known pull-in device also requires operation via separate operating elements in order to release the energy for pulling in the insert.

The invention has for its object to provide a construction that is as simple as possible in terms of construction, in which the slide-in takes place into the slide-in end position without additional operating elements via a predetermined feed path.

This object is achieved according to the invention in a pull-in device of the type described at the outset in that the pull-in path is a fixed fraction of the maximum pull-out path of the insert, in that a connecting part which is movable in the pull-out direction between a first and a second position and on which the energy store acts is provided the storage of the energy takes place by a locking element acting upon pulling out the insert and moving it from the first into the second position, that when the insert is pulled out beyond the pull-in path in the second position the connecting part can be fixed and the locking element and the connecting part except Can be brought into engagement that when the insert is pushed in when the second position is reached, the connecting part is detachable and can be brought into engagement with the latching element for the insertion of the insert, and that the connecting part and the energy store are provided on the body side it is arranged on the insert side and the locking element on the insert side or body side.

The essence of the present invention is thus to be seen in the fact that the catch element takes the connecting element from the first to the second position when the insert is pulled out, in particular when the insert is pulled out manually, thereby storing energy in the energy store that when the insert is pulled out further the Detent element is uncoupled from the connecting element and the connecting element remains fixed in the second position and that when the plug is subsequently reinserted when the connecting element reaches the second position, the detent element releases this again and now the connecting element via the locking element retracts into the inserted end position under the influence of Withdraws energy storage.

Thus, the solution according to the invention is structurally simple to manufacture and, in particular, no further drive and operating elements are required to store energy in the energy store and then to set the energy for the insertion of the insert.

The connecting part could be designed in the most varied of ways. A particularly simple and suitable constructive solution provides for the connecting part to be displaceably guided with a guide part in the pull-out direction.

It is particularly expedient if the connecting part can be snapped onto the guide part in the second position, so that the guide part also assumes the latching function in addition to guiding the connecting part.

A structurally very simple and expedient solution provides that the connecting part engages with a track follower in a slide track of the guide part. By providing the slide track, there is a very simple possibility to implement the guiding and locking of the connecting part.

In particular, the locking of the connecting part in the second position can be realized favorably in that the slide track has a locking surface for the track follower.

So far it has not been specified how the backdrop track should be designed in detail. It is particularly expedient if the slide track runs parallel to the pull-out direction with a guide track in which the track follower is then guided.

In such a configuration of the slide track, it is structurally simplest to provide the latching surface if the slide track has a latching recess lying to the side of the guide track for a latched position of the track follower.

In order to ensure that the track follower arrives in the latching position, the slide track is expediently designed such that it has a deflection slope which displaces the track follower of the guideway into the latching position, so that when the track follower is guided along the guideway shortly before reaching the latching position, it deflects in the locking position, in particular the locking recess.

In the exemplary embodiments of the pull-in device according to the invention described so far, there may still be the problem that the connecting element, triggered by events not provided for, comes loose from its defined second position and moves back into the first position under the influence of the energy store. For this reason, it is useful if the backdrop track for an alternative position lying next to the guideway provides an escape recess for the track follower when the connecting element is in the first position in order to be able to bring the latching element back into engagement with the track follower, so that the latter is in turn able to extract energy in the energy store when the insert is pulled out to save.

The evasive recess is advantageously designed in such a way that it has an insertion bevel which, after the latch element, in particular a nose thereof, has been moved past, leads the track follower back into alignment with the guide track.

With regard to the design of the locking element itself, no further details have so far been given. An advantageous embodiment provides that the locking element has a driving surface for the web follower. With this driving surface, the path follower of the connecting part is carried along from the first to the second position with the storage of energy in the energy store and, on the other hand, the locking element is carried along by the path follower from the second into the first position with the insertion.

Furthermore, a structurally expedient solution provides that the latching element has a sliding bevel running transversely to the pull-out direction for shifting the track follower from the latched position into the guide track. With this sliding bevel it is possible to release the path follower from its rest position and align it again with the guideway so that the path follower is below Attack on the driving surface of the latching element with the latching element moves the insert via the feed path into the end position of the insert.

Preferably, the sliding bevel is arranged at a distance from the driving surface, so that when the insert is pushed in after the driving surface has moved past the web follower, the sliding bevel comes into effect and releases the web follower from the rest position, so that it in turn engages the driving surface.

In order to create the possibility in the solution according to the invention in the first position of the connecting element to in turn bring a connecting element undesirably from the second position into the first position into engagement with the driving surface, there is a displacement slope on the locking element for moving the web follower into the evasive position provided with which the path follower can be moved into the alternative recess.

As an alternative to this, however, an escape recess can also be dispensed with if the displacement bevel is arranged on a spring element carrying the driving surface and the spring element together with the driving surface is able to move transversely to the direction of extension by the action of the displacement bevel and there is therefore the possibility of the driving surface in the case of a locking element which moves in the inserted position and the connecting element which is in the first position, to bring it back into engagement with the web follower, ie for reaching behind the web follower.

No details have so far been given regarding the design of the elastic energy store. A preferred exemplary embodiment provides that the elastic energy store is a variable-length elastic element.

It is particularly expedient if the element is guided over a deflection roller and extends with a first section leading to the connecting element essentially in the pull-out direction.

With regard to the arrangement of the second section of the element, it is provided that the element extends with a second section substantially parallel to the direction of extraction.

A preferred solution provides that the energy store is a highly elastic rubber band.

Alternatively, it is also conceivable that the energy store is a spring.

In the previously described embodiments of the solution according to the invention, it was not specified in detail how the pull-in device should be arranged relative to the pull-out guide. A particularly preferred exemplary embodiment provides that the latching part is arranged on a first guide rail of the pull-out guide which has the first and therefore second guide rail.

In addition, it is also advantageous, particularly for reasons of space, if the connecting part is mounted on a second guide rail of the pull-out guide comprising the second and a first guide rail.

Finally, it has also proven to be advantageous if the guide part is arranged on the second guide rail of the pull-out guide.

A preferred embodiment of the solution according to the invention, in which the connecting part and the latching part are arranged in an intermediate space formed between two C-shaped guide rails of the pull-out guide, is particularly space-saving. The guide part is also expediently arranged in this intermediate space.

Especially in connection with a pull-out guide, which represents a ball guide, it has proven to be useful if the connecting part and the locking part are arranged in a rear half of the guide rails facing away from a front of the body, since when inserting such a pull-out guide in the inserted end position, the ball cage migrates to the center of the two guide rails and thus offers in the rear half the guide rail space for receiving the feed device according to the invention.

The fact that the ball cage only moves to the center of the guide rail still offers the possibility, particularly in the case of a ball guide, of the elastic element through an opening in the rear part of the guide rail holding the connecting element to move back inside this guide rail in order to achieve the greatest possible length of the energy store, for example a spring or elastic band, without having to put up with the fact that such an arrangement is bulky.

Furthermore, it is particularly advantageous if the pull-in device according to the invention is integrated in the body-side guide rail and is constructed in particular in one piece with it.

• Fig. 1 einen Querschnitt durch einen hinteren Teil einer Auszugführung mit einer erfindungs­gemäßen Einzugeinrichtung;
• Fig. 2 eine seitliche Ansicht der Auszugführung mit in einer ersten Stellung stehendem Ver­bindungselement;
• Fig. 3 eine Seitenansicht ähnlich Fig. 2 mit in einer zweiten Stellung stehendem Ver­bindungselement;
• Fig. 4 eine Draufsicht auf ein Rastelement in Richtung des Pfeils A in Fig. 1;
• Fig. 5 eine Draufsicht auf ein Rastelement eines zweiten Ausführungsbeispiels;
• Fig. 6 eine Ansicht ähnlich Fig. 2 eines dritten Ausführungsbeispiels.

Further features and advantages of the solution according to the invention are the subject of the following description and the drawing of an exemplary embodiment; show in the drawing:

• Figure 1 shows a cross section through a rear part of a pull-out guide with a feed device according to the invention.
• 2 shows a side view of the pull-out guide with the connecting element in a first position;
• 3 shows a side view similar to FIG. 2 with the connecting element in a second position;
• Figure 4 is a plan view of a locking element in the direction of arrow A in Fig. 1.
• 5 shows a plan view of a latching element of a second exemplary embodiment;
• Fig. 6 is a view similar to Fig. 2 of a third embodiment.

A first embodiment of a pull-in device according to the invention - shown in FIGS. 1 to 5 - comprises a pull-out guide designated as a whole as 10, which comprises a slide-in guide rail 12 and a body-side guide rail 14, both of which are essentially C-shaped and with their open sides are arranged facing one another, the body-side guide rail 14 being held on a body 16, while the insert-side guide rail 12 is held on an insert 18 and is guided on the body-side guide rail 14 by means of rolling elements 20 which are between the mutually facing legs of the guide rails 12 and 14 are arranged. The pull-out guide 10 is preferably a ball pull-out guide.

On the body-side guide rail 14, namely at a distance from a middle leg 22 thereof, a guide part 24 is arranged on a rear area facing away from a front side of the body, which extends in the form of a plate parallel to the middle leg 22 in the pull-out direction between the side legs 26.

Between the guide part 24 and the middle leg 22, a connection part, designated as a whole with 28, is guided with a foot plate 30, which is connected with a web Follower serving and rising from the base plate 30 engages bolt 32 in a slide track designated as a whole with 34 of the guide member 24, the slide track 34 being formed in the form of a recess in the plate-shaped guide member 24.

The sliding track 34 comprises a guide track 40 which extends with its longitudinal axis 36 parallel to the pull-out direction 38 and which, at its front end facing the front of the body 16, has a latching recess 42 which is offset laterally to the longitudinal axis 36 and which is essentially perpendicular to the longitudinal axis 36 extending locking surface 44 includes. Furthermore, a deflection slope 46, which runs obliquely to the longitudinal axis 36, leads from the guide track 40 to the latching recess 42.

Furthermore, the slide track 34 comprises an alternative recess 48 which adjoins the guide track 40 at its end opposite the latching recess 42 and which leads into the guide track 40 with an insertion bevel 50.

The bolt 32 which is displaceable in the guide track 34 is thus guided by the guide track 40 in the direction of its longitudinal axis 36, and in the region of the latching recess 42 on the deflection bevel 46 is displaced transversely to the longitudinal axis 36 into the latching recess 42 so that it rests on the latching surface 44 can come to the plant.

At the opposite end of the guideway 40, the bolt 32 has the possibility, also transversely to the longitudinal axis 36, and preferably in the same direction as in the Dodge recess 42 in the escape recess 48. A return of the bolt 32 to a position aligned with the guideway 40 takes place via the insertion slope 50.

On the connecting part 28, in particular on the base plate 30, a highly elastic rubber band 52 acts as an elastic energy store, which is guided over a deflection roller 56 arranged at a rear end 54 of the body-side guide rail 14 and, starting from this deflection roller 56, parallel to one of the side legs 26 runs along the body-side guide rail, through an opening 58 in this side leg 26 back into an interior of the body-side guide rail 40, ie is guided between the two side legs 26 and is connected there by a holding element 60 to the body-side guide rail 14.

The rubber band 52 thus strives to pull the connecting part 28 opposite to the pull-out direction 38.

On the insert-side guide rail 12, in particular on the middle leg 62 thereof, a latching element, shown enlarged in FIG. 4 and designated as a whole by 64, is held, which has a U-shaped inlet channel 66 facing the connecting part 28, in which the passage channel via the guide part 24 Bolt 32 projecting in the direction of the insertion-side guide rail 12 can be inserted. The inlet channel 66 is aligned with the guideway 40 and comprises an open end 68 pointing in the pull-out direction 38 and a closed end, which is completed by a driving surface 70, which preferably extends perpendicular to the longitudinal axis 36 of the guideway 40.

The inlet channel 66 further comprises a lateral opening 72 which is delimited on the one hand by the driving surface 70 and on the other hand by a sliding bevel 74. Through this lateral opening 72, the bolt, for example bearing against the driving surface 70, has the possibility of sliding back into the locking recess 42 or the escape recess 48 or from these into the inlet channel 66 transversely to the longitudinal axis 36 of the guide track 40.

Furthermore, a nose 76 carrying the driving surface 70 is provided on its side opposite the driving surface 70 in the direction of the longitudinal axis 36 with a displacement bevel 78.

The first exemplary embodiment, shown in FIGS. 1 to 4, now functions in such a way that, when the insert 18 is in the inserted end position, the bolt 32 is arranged in alignment with the guideway 40 at a rear end thereof at the level of the escape recess 48. Furthermore, the locking element 64 is arranged on the insertion-side guide rail 12 in the insertion end position such that its inlet channel 66 is aligned with the guide track 40 and the bolt 32 bears against the driving surface 70 or is at a short distance therefrom. As a result, the insert 18 is held in its inserted end position by the bolt 32, which is acted upon by the rubber band 52 in the direction opposite to the pull-out direction 38.

If the insert 18 is now moved in the pull-out direction 38, the bolt 32 and thus the entire connecting part 28, guided by the foot plate 30 between the guide part 24 and the middle leg 22 of the body-side guide rail 14, is moved along the insertion path by means of the driving surface 70 of the guideway 40 moves until the bolt 32 on the front end of the guideway 40 facing a front of the body 16 is displaced through the deflection bevel 46 of the link path 34 transversely to the longitudinal axis 36 of the guideway 40 into the latching recess 42. The driving surface 70 is dimensioned such that when the bolt 32 is in the latching recess 42, the nose 76 can slide freely past the bolt 32, so that the insert 18 can be pulled out further without further tensioning the rubber band 52.

Due to the action of the rubber band 52, the connecting part 28 and thus the bolt 32 is pulled in the opposite direction to the pull-out direction 38 and comes to rest in the latching recess 42 on the latching surface 44, which thus the connecting part 28 arrives in this second position by the application of the bolt 32 the latching surface 44 locked, so that the rubber band is held taut, as shown in Fig. 3.

When the insert 18 is inserted again opposite to the pull-out direction 38, the bolt 32 comes to rest with the sliding bevel 74 of the locking element 64 approaching the bolt 32, the sliding bevel 74 being inclined so that it in turn transversely to the longitudinal axis 36 in an aligned manner Position with the guide track 40 and the inlet channel 66 pushes, so that now the stored energy is released and by the Effect of the rubber band 52 of the insert 18 is moved by the pin 32 resting on the driving surface 70 into the end position of the insert, in which the connecting part 28 is again in its first position and the pin 32 rests against the locking recess 42 at the opposite end.

In order to create the possibility in all cases that the bolt 32 comes to rest against the driving surface 70, the nose 76 is provided with the displacement slope 78. In conjunction with the evacuation recess 48, this has the task of ensuring that the pin 32 engages behind again through the driving surface 70 in all the cases in which the connecting part 28 has been moved from the second position to the first, for example without the action of the latching element 64.

If, for example, in the first position of the connecting part 28, the bolt 32 is located at the rear end of the sliding track 34 and the insert 18 is inserted, the displacement surface 78 leading the driving surface 70 has the task of inserting the bolt 32 into the alternative recess 48 transversely to the longitudinal axis 36 of the guideway 40 to insert so that the nose 36 can be moved past the bolt 32, and the bolt 32 comes to rest after passing the nose 76 in front of the driving surface 70. Through the insertion bevel 50 is further achieved that the bolt 32 moved into the escape recess 48 due to the pull of the rubber band 52 again in alignment with the guide track 40, this movement of the bolt 32 is additionally supported by the fact that the rubber band with a small force component directed away from the escape recess 48 on the Connecting part 28 acts and thus always strives to keep the bolt 32 in alignment with the guideway 40, as shown in FIG. 2.

In a second exemplary embodiment of a pull-in device according to the invention, the catch element, as shown in FIG. 5, is designed such that the displacement bevel 78 is arranged on a spring clip 80, which in turn bears the driving surface 70 opposite the displacement bevel 78, with the spring clip 80 having the possibility to dodge transversely to the longitudinal axis 36 by a resilient movement in the direction of arrow 82. This makes it unnecessary to provide the escape recess 48 with the insertion bevel 50, since in the case in which the bolt 32 is in the position corresponding to the first position of the connecting part 28 and the insert 18 is pushed in, the displacement bevel 78 runs counter to the bolt 32 a sideways movement of the spring clip 80 causes it to be moved past the bolt 32 to such an extent that the driving surface 70 in turn engages behind the bolt 32 by springing back and is able to pull it along the guideway 40 and Take escapes with you.

In a third embodiment of the solution according to the invention, shown in FIG. 6, a spiral compression spring 84 is provided instead of the rubber band 52, which is also supported on the one hand on the connecting part 28 and on the other hand is held on the body-side guide rail 14 by means of a holding element 86. This spiral compression spring 84 also acts on the connecting part 28 in the direction of its first position and is able to store energy when moving the connecting part 28 from the first to the second position, which energy is available for the insertion of the insert 18 via the insertion path.

Insofar as the reference numerals of the first exemplary embodiment are used in the second and third exemplary embodiments, the identical parts are used as in the first exemplary embodiment, so that reference can be made to the explanations for this in the first exemplary embodiment.

Claims (23)

1. A pull-in device for a slide-in device that can be moved from a body in the pull-out direction by means of a roller guide-mounted pull-out guide, comprising an elastic energy store, with the stored elastic energy of which the slide-in device can be moved into a slide-in end position via a pull-in path.
characterized,
that the pull-in path is a fixed fraction of the maximum pull-out path of the slide-in unit, that a connecting part (28) is provided in the pull-out direction that can be displaced between a first and a second position, on which the energy store (52) acts, that the storage of the energy by pulling out of the insert (18) engaging on the connecting part (28) and moving this from the first into the second position latching element (64) that the connecting part (28) can be fixed in the second position when the insert (18) is pulled out beyond the feed path and the latching element and the connecting part can be disengaged so that when the insert (18) is pushed in when the second position is reached, the connecting part (28) is detachable and can be engaged with the latching element (64) for the insertion of the insert (18) and that the connecting part (28) and the energy store (52) on the body side or on the insertion side and the latching element (64) on the insertion side are arranged on the body side. 2. Feeding device according to claim 1, characterized in that the connecting part (28) in a guide part (24) in the pull-out direction (38) is displaceably guided. 3. Feeding device according to claim 2, characterized in that the connecting part (28) on the guide part (24) can be latched in the second position. 4. Feeding device according to claim 3, characterized in that the connecting part (28) engages with a track follower (32) in a slide track (34) of the guide part (28). 5. Feeding device according to claim 4, characterized in that the slide track (34) has a latching surface (44) for the web follower (32). 6. Feeding device according to claim 4 or 5, characterized in that the slide track (34) with a guide track (40) runs parallel to the pull-out direction (38). 7. Feeding device according to claim 5 or 6, characterized in that the sliding track (34) has a laterally the guide track (40) lying recess (42) for a rest position of the web follower (32). 8. Feeding device according to claim 7, characterized in that the slide track has a track follower (32) from the guide track (40) in the locking recess (42) displacing deflection slope (46). 9. Feeding device according to one of claims 4 to 8, characterized in that the slide track (34) for an adjacent position next to the guide track (40), an escape recess (48) for the track follower (32) with the connecting element (28 ) provides. 10. Feeding device according to one of the preceding claims, characterized in that the latching element (64) has a driving surface (70) for the web follower (32). 11. Feeding device according to claim 10, characterized in that the locking element (64) has a transverse to the pull-out direction (38) sliding bevel (74) for moving the track follower (32) from the locking position in the guide track (40). 12. Feeding device according to claim 10 or 11, characterized in that the latching element (64) has a displacement slope (78) for displacing the web follower (32) in the escape recess (48). 13. Feeding device according to claim 12, characterized in that the displacement bevel (78) is arranged on a spring element (80) carrying the driving surface (70). 14. Feeding device according to one of the preceding claims, characterized in that the elastic energy store (52) is a variable-length elastic element. 15. Feeding device according to claim 14, characterized in that the element (52) is guided over a deflecting roller (56) and extends with a first section leading to the connecting element (28) essentially in the pull-out direction (38). 16. Feed device according to claim 15, characterized in that the element (52) extends with a second section substantially parallel to the direction of extraction (38). 17. Feed device according to one of claims 14 to 16, characterized in that the energy store is a highly elastic rubber band (52). 18. Feeding device according to one of claims 1 to 16, characterized in that the energy store is a spring (82). 19. Feed device according to one of the preceding claims, characterized in that the latching part on a first guide rail (12) of the first and a second guide rail having pull-out guide (10) is arranged. 20. Feeding device according to one of the preceding claims, characterized in that the connecting part is mounted on a second guide rail (14) of the pull-out guide (10) comprising the second and a first guide rail. 21. Feeder device according to claim 20, characterized in that the guide part (24) on the second guide rail (14) of the pull-out guide (10) is arranged. 22. Feed device according to one of claims 19 to 21, characterized in that the connecting part (28) and the latching part (64) are arranged in a space formed between two C-shaped guide rails (12, 14) of the pull-out guide (10). 23. Feeding device according to one of claims 19 to 22, characterized in that the connecting part and the latching part are arranged in a rear half of the guide rails (12, 14) facing away from a front side of the body (16).

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