Pull-out guide device with a front adapter for locking a push-pull element

Abstract

The present invention relates to a pulling and pushing element (20), in particular a drawer, a tray or a drawer frame, a pulling and guiding device (1), which has: a body rail (2) that can be fixed to the body; a pulling rail (3) that can be fixed to the pulling and pushing element (20), the pulling rail is movably guided relative to the body rail (2) and has an upper rail leg (3a) in the assembled position, and its upper side (8) forms a support for the pulling and pushing element (20); a front adapter (10), which is fixed to the front end of the pulling rail (3) along the pulling direction (7) of the pulling rail and has a locking projection (14), the locking projection protrudes upward from the notch (15) of the upper rail leg (3a) above the upper side (8) in the initial position and can be deflected downward from the initial position against the action of the restoring force to a position flush with the upper side (8). The locking projection (14) is arranged to be deflectable only linearly in a direction (16) perpendicular to the upper side (8) of the upper rail leg (3a).

Description

Field of the Invention

[0001] The present invention relates to a pull-out guiding device for a pulling and pushing element, in particular a drawer, a tray or a drawer frame, having: a body rail that can be fixed to a body; a pull-out rail that can be fixed to the pulling and pushing element, the pull-out rail being guided movably relative to the body rail and having a rail leg that is in an upper position in the assembled position, the upper side of the rail leg forming a support for the pulling and pushing element; and a front adapter that is fixed to the front end of the pull-out rail along the pulling-out direction of the pull-out rail and has a locking projection that projects upward through a notch in the upper rail leg above the upper side in an initial attitude and can be deflected downward from the initial attitude against the action of a restoring force to a position flush with the upper side. Background Art

[0002] Such a pull-out guiding device is disclosed, for example, in WO 2019 / 191793 A1. In the disclosed pull-out guiding device, the locking projection can be deflected from an initial attitude about an axis extending horizontally in the installed position to a position flush with the upper side. The locking projection is preloaded to the initial attitude by means of a separate leaf spring. The locking projection is provided at the free end of a separate tab, the other end of the tab being in the front adapter. Summary of the Invention

[0003] In contrast, the object of the present invention is to provide an alternative locking type in a pull-out guiding device of the type described at the beginning of this text.

[0004] According to the present invention, the object is solved in that the locking projection is mounted so as to be deflectable only linearly in a direction perpendicular to the upper side of the upper rail leg.

[0005] In a particularly preferred embodiment of the present invention, the locking projection is arranged on the upper side at the middle of a leaf spring that can be elastically deflected linearly downward in the front adapter, the leaf spring being arranged below the upper rail leg and parallel to the upper rail leg and being exposed in the front adapter by means of two notches arranged on both sides of the leaf spring. Since the leaf spring is arranged in the middle, it is ensured that the locking projection can be deflected only linearly downward in a direction perpendicular to the upper side of the upper rail leg. By connecting the two leaf ends to the front adapter on both sides, a high elastic restoring force is obtained.

[0006] In a further particularly preferred embodiment of the invention, the locking projection is eccentrically arranged on the upper side on a resilient tab of the front adapter which can be linearly elastically deflected downwards, which tab is arranged below the upper rail leg and parallel to it and is exposed or cut out in the front adapter by means of two notches which are arranged on both sides of the tab, wherein the tab has a cross-section reduction on the shorter tab side relative to the longer tab side with respect to the locking projection. As a result, by deliberately weakening the shorter tab side, these two tab sides of the tab (although of different lengths) are constructed to have the same elasticity.

[0007] Advantageously, the resilient tab extends in the longitudinal direction of the drawer rail so that the tab can be made long enough to achieve the desired deflection.

[0008] The front adapter can for example have a plate section which is arranged below the upper rail leg and parallel to it, in which plate section the resilient tab is exposed by means of the two notches.

[0009] Preferably, the two notches are constructed to be mirror-symmetrical with respect to the central plane of the tab and are formed by two longitudinally closed slots which define the tab therebetween. Advantageously, the two longitudinal slots extend at least predominantly parallel to one another.

[0010] Preferably, the front adapter has two laterally outwardly projecting stop tabs on both sides, which stop tabs are laterally inwardly exposed respectively by notches and can be elastically deflected laterally inwards into the notches. The front adapter is plugged or inserted onto the front end of the drawer rail, whereby these stop tabs are elastically deflected inwards until they can snap into notches of the drawer rail and thereby lock the front adapter onto the drawer rail.

[0011] Particularly preferably, the locking projection is formed on the resilient tab and the front adapter is formed of plastic, for example as an injection molded part.

[0012] The body rail and the drawer rail are either movably supported directly on one another or are supported so as to be relatively movable with respect to one another by means of an intermediate rail arranged between them.

[0013] The invention also relates to a piece of furniture which has two pull-out guide devices constructed as described above and a push-pull element which is arranged between the two pull-out guide devices and is respectively supported on two horizontal upper rail legs of two pull-out rails, wherein the push-pull element is moved against the pull-out direction into a locking position on the upper rail legs, in which locking position the locking projections of two front adapters respectively engage upwards into notches on the lower side of the push-pull element in order to couple the push-pull element to the two pull-out rails in the pull-out direction and against the pull-out direction.

[0014] Further advantages of the present invention result from the description, the claims and the drawings. Similarly, the features mentioned above and those yet to be further elaborated can be used individually or in any combination of multiple ones. The illustrated and described embodiments should not be understood as exhaustive, but rather have exemplary features for illustrating the present invention. Description of the Drawings

[0015] In the drawings:

[0016] Figure 1a , 1b shows the pull-out guide device of the present invention in the moved-in terminal position, with a drawer rail ( Figure 1a ) and without a drawer rail ( Figure 1b );

[0017] Figure 2 shows the detail view according to II in Figure 1b ;

[0018] Figures 3a - 3c shows the front adapter of the drawer rail in perspective view ( Figure 3a ), in top view (3b) and in side view ( Figure 3c );

[0019] Figure 4a , 4b shows the longitudinal sectional view of the front adapter shown in FIG. 3, which has a locking projection centrally arranged on the spring plate, and this locking projection is in the undeflected initial position in Figure 4a and in the downwardly deflected terminal position in Figure 4b ;

[0020] Figures 5a - 5c shows the assembly of the drawer on the pull-out guide device of the present invention; and

[0021] Figure 6 shows the top view of the modified front adapter, which has a locking projection eccentrically arranged on the spring plate. Detailed Description of the Embodiment

[0022] In Figure 1a , 1b , the pull-out guide device 1 shown includes a body rail 2 that can be fixed to the furniture body, a drawer rail (pull-out rail) 3 that can be fixed to the drawer, and an intermediate rail 4 that is movably supported on the body rail 2 and the drawer rail 3. These rails 2, 3, 4 are guided relative to each other in the longitudinal direction by rolling elements 5. Two body legs 6 for fixing to the furniture body are provided on the body rail 2.

[0023] The drawer cabinet 3 can be pulled out along the pull-out direction 7 relative to the body rail 2 from Figure 1a , 1bThe moved-in terminal position shown in the figure is pulled out into a moved-out terminal position (not shown), wherein the intermediate rail 4 enables the drawer rail 3 to be fully pulled out relative to the body rail 2. If full pull-out is not desired, the intermediate rail is not required and the drawer rail 3 is movably supported directly on the body rail 2.

[0024] The drawer rail 3 has a (horizontal) upper rail leg 3a and two (vertical) side rail legs 3b extending parallel to each other. The flat outer side or upper side 8 of the upper rail leg forms a support for the drawer. The side rail legs are connected to each other at the upper part by the upper rail leg 3a. Instead of the downward-opening U-shaped rail profile shown here, the drawer rail 3 can also be a side-opening U-shaped rail profile or have other profile geometries, but always has a (horizontal) upper rail leg 3a with a flat upper side 8.

[0025] As shown in Figure 2 in the detail view, a front adapter 10 is fixed to the front end portion of the drawer rail 3 along the pulling-out direction 7. The front adapter 10 is preferably plugged or inserted onto the front end portion of the drawer rail 3 and has a flat plate section 11, which is arranged below the upper rail leg 3a, here arranged in the inner space of the drawer rail 3 and extends parallel to the upper rail leg 3a.

[0026] As especially shown in Figures 3a - 3c in the figure, a spring plate 13 is exposed in the plate section 11 by means of two notches here exemplarily configured as longitudinal slots 12. The spring plate is connected to the plate section 11 at its two plate end portions and the spring plate (and the longitudinally closed longitudinal slots 12 on both sides) extends in the longitudinal direction of the drawer rail 2. The two longitudinal slots 12 are arranged on both sides of the spring plate 13 to define the spring plate 13 therebetween. As Figure 3b shown in the figure, these longitudinal slots 12 are formed symmetrically mirror-image to each other with respect to the middle plane of the plate of the spring plate 13 and extend mostly parallel to each other. The two longitudinal slots 12 are only reduced to a small spacing at their rear slot ends along the pulling-out direction 7 for spatial reasons.

[0027] The spring plate 13 has a locking projection 14 on its plate middle on the upper side, which projects above the upper side 8 through a notch 15 of the upper rail leg 3a in the initial position ( Figure 4b ). The locking projection 14 can be deflected from the initial position against the action of an elastic restoring force in a direction 16 perpendicular to the plate plane of the plate section 11 or to the upper side 8 into a terminal position ( Figure 4b ) flush with the upper side 8. Since it is arranged in the middle of the spring plate 13, the locking projection 14 is only linearly deflected downward in the direction 16 perpendicular to the upper side 8.

[0028] On a rear end portion that is behind in the pulling-out direction 7, the plate section 11 has two laterally outwardly protruding stop tabs 17 on both sides. These stop tabs are respectively exposed inwardly through longitudinal slots 12 and can be elastically deflected inwardly from the sides into the longitudinal slots 12. The front adapter 10 is inserted onto the front end portion of the drawer rail 3, whereby the stop tabs 17 are elastically deflected inwardly from the side legs 3b of the drawer rail 3 until they can snap into the notches 18 of the side legs 3b and thereby lock the front adapter 10 onto the drawer rail 3.

[0029] The front adapter 10 is preferably an injection-molded part made of plastic, wherein the locking projection 14 is integrally formed on the elastic piece 13.

[0030] In Figures 5a - 5c the assembly of the drawer 20 is shown, which drawer has a flat drawer underside 21, on which the pulling-out guiding device 1 is shown.

[0031] The drawer 20 is supported at its rear end portion on the front end portion of the horizontal drawer rail 3 that is in front in the pulling-out direction 7 and is thereby also supported on the locking projection 14. Thereby, the locking projection 14 is pressed down by the drawer 20 into a position flush with the upper rail side 8, and the drawer 20 is supported on the horizontal upper rail side 8 of the drawer rail 3 with its drawer underside 21 ( Figure 5a ). That is, the elastic restoring force of the locking projection 14 is less than the gravity of the drawer 20.

[0032] Then, the drawer 20 is further moved on the horizontal upper rail side 8 against the pulling-out direction 7, wherein the locking projection 14 is still held pressed down by the drawer 20 into a position flush with the upper rail side 8 ( Figure 5b ).

[0033] The drawer 20 is moved on the drawer rail 3 against the pulling-out direction 7 until it reaches the locked position ( Figure 5c ), in which the locking projection 14 fits upwardly into the lower-side notch 22 of the drawer underside 21 and thereby returns to its initial position. When viewed in the longitudinal direction of the drawer rail 3, the locking projection 14 fits into the notch 22 with a minimum clearance, whereby the drawer 20 is kinematically coupled to the drawer rail 3 along and against the pulling-out direction 7, i.e., in the horizontal direction.

[0034] In Figure 6In the front adapter 10 shown in the figure, the locking projection 14 is eccentrically arranged on the spring plate 13, specifically closer to the front sheet end in the pulling direction. In order to still be able to generate a linear deflection movement of the locking projection 14 in the direction 16 perpendicular to the plate plane of the plate section 11 or the upper side 8, the spring plate 13 has a cross-section reduction on the sheet side shorter with respect to the locking projection 14 compared to the longer sheet side, here a reduced sheet width. As a result, by purposefully weakening the shorter sheet side, these two sheet sides of the spring plate 13 (although of different lengths) are constructed to have the same elasticity.

Claims

1. A pull-out guiding device (1) for a push-pull element (20), having: - A body rail (2) that can be fixed to the body; - A pull-out rail (3) that can be fixed to the push-pull element (20), which is guided movably relative to the body rail (2) and has an upper rail leg (3a) that is in the upper part in the assembled position, and the upper side (8) of the upper rail leg forms a support for the push-pull element (20); and - A front adapter (10) that is fixed to the front end portion of the pull-out rail (3) that is in front along the pull-out direction (7) of the pull-out rail (3) and has a locking projection (14), which projects upward through a first notch (15) of the upper rail leg (3a) above the upper side (8) in the initial position and can be deflected downward from this initial position against the action of a restoring force to a position flush with the upper side (8), wherein the locking projection (14) is arranged to be deflectable only linearly in a direction (16) perpendicular to the upper side (8) of the upper rail leg (3a), characterized in that the locking projection (14) is arranged on the upper side at the middle of a leaf spring (13) of the front adapter (10) that can be elastically deflected linearly downward, the leaf spring is arranged below the upper rail leg (3a) and parallel to the upper rail leg (3a) and is exposed in the front adapter (10) by means of two second notches (12), and these second notches are arranged on both sides of the leaf spring (13), or, the locking projection (14) is arranged eccentrically on the upper side on a leaf spring (13) of the front adapter (10) that can be elastically deflected linearly downward, the leaf spring is arranged below the upper rail leg (3a) and parallel to the upper rail leg (3a) and is exposed in the front adapter (10) by means of two second notches (12), and these second notches are arranged on both sides of the leaf spring (13), wherein the leaf spring (13) has a cross-section reduction portion on the shorter leaf side with respect to the locking projection (14) relative to the longer leaf side.

2. The pull-out guiding device according to claim 1, wherein The leaf spring (13) extends in the longitudinal direction of the pull-out rail (3).

3. The pull-out guiding device according to claim 1 or 2, characterized in that, The front adapter (10) has a plate section (11) that is arranged below the upper rail leg (3a) and parallel to the upper rail leg (3a), and in this plate section, the leaf spring (13) is exposed by means of the two second notches (12).

4. The pull-out guiding device according to claim 1 or 2, characterized in that, The two second notches (12) are configured to be mirror-symmetrical to each other with respect to the middle plane of the leaf spring (13).

5. The pull-out guiding device according to claim 1 or 2, characterized in that, The two second notches are formed by two longitudinally closed longitudinal slots, and these longitudinal slots define the leaf spring (13) between them.

6. The pull-out guiding device according to claim 5, characterized in that, The two longitudinal slots extend at least mostly parallel to each other.

7. The pull-out guiding device according to claim 1 or 2, characterized in that, The front adapter (10) has two laterally outwardly projecting limit pieces (17) on both sides, and these limit pieces are laterally inwardly exposed through the second notches (12) respectively and can be elastically deflected laterally inward into the second notches (12).

8. The pull-out guiding device according to claim 1 or 2, characterized in that, The locking projection (14) is formed on the leaf spring (13).

9. The pull-out guiding device according to claim 1 or 2, characterized in that, The front adapter (10) is formed of plastic.

10. The pull-out guiding device according to claim 1 or 2, characterized in that, The body rail (2) and the pull-out rail (3) are movably supported on one another.

11. The pull-out guiding device according to claim 1 or 2, characterized in that, The body rail (2) and the pull-out rail (3) are movably supported respectively on an intermediate rail (4) arranged therebetween.

12. The pull-out guiding device according to claim 1 or 2, characterized in that, The push-pull element (20) is a drawer, a tray or a drawer frame.

13. A piece of furniture having two pull-out guide devices (1) according to one of the preceding claims 1 to 12 and a push-pull element (20) which is arranged between the two pull-out guide devices (1) and is supported respectively on two horizontal upper rail legs (3a) of the two pull-out rails (3), wherein the push-pull element (20) is moved into a locked position against the pull-out direction (7) on the upper rail legs (3a), in which locked position the locking projections (14) of the two front adapters (10) engage respectively upwards into third notches (22) on the underside of the push-pull element (20) in order to couple the push-pull element (20) to the two pull-out rails (3) for movement in the pull-out direction (7) and against the pull-out direction (7).

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