Drawer pull-out guide
Patent Information
- Application Number
- EP2024719045
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2023-05-22
- Filing Date
- 2024-04-08
- Publication Date
- 2026-02-11
- Estimated Expiration
- 2044-04-08
AI Technical Summary
Existing drawer pull-out guides can cause damage to wooden drawers due to excessive force concentration at the engagement section, leading to slitting or detachment when the drawer is opened too quickly, particularly with inexpensive materials like chipboard.
The engagement section of the driver has a widened contact surface, which distributes forces over a larger area, and can be convexly curved to adapt to cylindrical bores, preventing point contacts and ensuring secure attachment without damaging the drawer.
This design prevents the drawer from being slit open and maintains secure coupling with the pull-out rail, even when made from breakable materials like chipboard, ensuring reliable operation and safety.
Smart Images
Figure AT2024060123_28112024_PF_FP_ABST
Abstract
Description
[0001] Drawer pull-out guide
[0002] The present invention relates to a drawer pull-out guide for the movable storage of a drawer relative to a furniture body, comprising:
[0003] - at least one carcass rail to be attached to a furniture carcass,
[0004] - at least one pull-out rail which is mounted so as to be movable relative to the body rail,
[0005] - at least one fastening device for releasably fastening a drawer to the at least one pull-out rail, wherein the at least one fastening device has at least one driver,
[0006] - wherein the at least one driver has an engagement section which can be inserted into a recess in the drawer, wherein the engagement section is arranged on a fastening web via at least one connecting section, wherein the fastening web is fixed in a non-releasable and stationary manner to the pull-out rail,
[0007] - wherein the engagement portion, the connecting portion and the fastening web are formed integrally with one another,
[0008] - wherein the engagement portion has at least one contact surface for contact with an inner wall of the recess of the drawer,
[0009] - wherein the engagement portion has a center plane parallel to a longitudinal direction of the at least one pull-out rail, wherein the connecting portion is arranged in the center plane of the engagement portion.
[0010] Furthermore, the invention relates to an arrangement with at least one drawer pull-out guide of the type to be described and with a drawer which is releasably fastened to the at least one pull-out rail of the drawer pull-out guide via the at least one fastening device.
[0011] Such a drawer pull-out guide is designed to detachably connect a drawer made of wood to a movable pull-out rail of the drawer pull-out guide. For this purpose, a fastening device with a driver is usually provided in the front end region of the pull-out rail, wherein the driver has an engagement section that can be inserted into a recess, for example a cylindrical bore, in the drawer. On the one hand, the driver couples the drawer to a movement of the pull-out rail, and on the other hand, the driver restricts or prevents a horizontal relative movement between the drawer and the pull-out rail.
[0012] Tests by the applicant have shown that problems can arise from the engagement section of the driver engaging in the recess of the drawer. If, for example, the drawer is opened at excessive speed, the engagement section of the driver engaging in the drawer side wall or drawer base may cut through the wooden material of the drawer, causing a slit in the drawer side wall or drawer base in a direction running lengthwise along the extension rail. This may ultimately result in the coupling between the driver and the extension rail no longer being maintained and the drawer could fall out of the furniture body when operated.
[0013] The object of the present invention is to provide a drawer pull-out guide of the type mentioned at the outset while avoiding the disadvantages discussed above.
[0014] This is achieved according to the invention by the features of patent claim 1. Advantageous embodiments of the present invention are specified in the dependent claims.
[0015] According to the invention, it is provided that the at least one contact surface of the engagement section has a greater width in a direction transverse to the longitudinal direction of the at least one pull-out rail than a material thickness of the fastening web.
[0016] In other words, a thickness greater than the material thickness of the
[0017] A widened contact surface of the driver is created by means of the fastening web, whereby the forces occurring between the contact surface of the driver and an inner wall of the recess can be distributed over a larger area.
[0018] This avoids point contact with high pressure forces, preventing the drawer from being ripped open by the engaging portion of the driver. This is particularly advantageous when the drawer is made of inexpensive chipboard, which is prone to breakage.
[0019] According to one embodiment, the at least one contact surface of the engagement portion can be convexly curved. A convex contact surface allows the engagement portion to be better adapted to a recess in the form of a cylindrical bore, whereby the tolerances can be compensated and the forces generated are distributed over a larger area.
[0020] The arrangement according to the invention comprises a drawer pull-out guide of the type in question and a drawer, wherein the drawer is releasably fastened to the at least one pull-out rail of the drawer pull-out guide via the at least one fastening device.
[0021] Further details and advantages of the present invention are explained with reference to the following description of the figures.
[0022] Fig . la , 1b show perspective views of a piece of furniture with a
[0023] Furniture body and with a drawer that is movable relative to the furniture body and a drawer pull-out guide with a drawer arranged on it,
[0024] Fig. 2a, 2b show the drawer in a cross-sectional view and the drawer pull-out guide in a perspective view,
[0025] Fig . 3a-3c show the drawer guide and the
[0026] Fastening device for releasably fastening the drawer in various views, Fig. 4a-4c show various designs of a driver for releasably coupling a drawer to a pull-out rail of a drawer pull-out guide.
[0027] Fig . la shows a perspective view of a piece of furniture 1 with a furniture body 2 , wherein drawers 3 are mounted so as to be movable relative to the furniture body 2 via drawer pull-out guides 4 .
[0028] For reasons of clarity, the top drawer 3 is not shown.
[0029] The drawer pull-out guides 4 for moving the drawer 3 relative to the furniture body 2 each comprise a body rail 9 to be fastened to the furniture body 2 and at least one pull-out rail 10 which is mounted so as to be movable in the longitudinal direction L relative to the body rail 9.
[0030] If appropriate, an additional center rail can be arranged between the carcass rail 9 and the pull-out rail 10 so that the drawer 3 can be fully extended relative to the furniture carcass 2.
[0031] At the front end of the pull-out rail 10, at least one fastening device 12 for releasably fastening the drawer 3 is arranged.
[0032] Fig. 1b shows a drawer pull-out guide 4 with the
[0033] Drawer 3 in a perspective view.
[0034] The drawers 3 each comprise a front panel 5, drawer side walls 6a, 6b, a rear wall 7 and a drawer bottom 8. The drawers 3 are preferably each made of a wooden material, for example of real wood or of a chipboard material.
[0035] Fig. 2a shows the drawer arranged on the drawer guide 4
[0036] 3 according to Fig. 1b in a cross-sectional view from the rear. The drawer pull-out guide 4 comprises a body rail 9 to be fastened to the furniture body 2 and at least one pull-out rail 10 movable relative to the body rail 9, wherein the drawer 3 can be detachably connected to the movable pull-out rail 10 of the drawer pull-out guide 4 via at least one fastening device 12.
[0037] The at least one fastening device 12 is arranged at the front end of the pull-out rail 10 and comprises at least one driver 13 which can be detachably coupled to the drawer 3.
[0038] The driver 13 enables the drawer 3 to be coupled to a movement of the pull-out rail 10, whereby a relative movement between the drawer 3 and the pull-out rail 10 can be prevented or limited by the driver 13.
[0039] The driver 13 has an engagement section 14 which can be inserted into a recess 15 of the drawer 3, wherein the engagement section 14 is arranged on a fastening web 23 via at least one connecting section 16.
[0040] The fastening web 23 is permanently and stationary attached to the pull-out rail 10. The fastening web 23 can, for example, be integrally connected to the pull-out rail 10, for example, by welding. Alternatively or additionally, the fastening web 23 can be positively and / or non-positively connected to the pull-out rail 10.
[0041] The engagement portion 14, the connecting portion 16, and the fastening web 23 are formed integrally with one another. This enables cost-effective production, while preventing faulty connection points and thus undesirable relative movement between these components.
[0042] The one-piece component, consisting of the engagement portion 14, the connecting portion 16, and the fastening web 23, can be manufactured, for example, by milling, deep drawing, or by a casting process. The engagement portion 14 of the driver 13 has at least one contact surface 17 for contacting an inner wall 15a of the recess 15 of the drawer 3. The at least one contact surface 17 can extend transversely to the longitudinal direction L of the pull-out rail 10.
[0043] The engagement section 14 of the driver 13 has a center plane ME parallel to a longitudinal direction L of the at least one pull-out rail 10, wherein the connecting section 16 is arranged in the center plane ME of the engagement section 14.
[0044] The arrangement of the engaging portion 14 and the connecting portion
[0045] 16 in a common central plane ME has the advantage that lateral tilting moments between these components are avoided and a central load distribution is ensured .
[0046] According to the invention it is provided that the at least one contact surface
[0047] 17 of the engagement portion 14 of the driver 13 has a greater width in a direction transverse to the longitudinal direction L of the at least one pull-out rail 10 than a material thickness 18 of the fastening web 23.
[0048] Due to the increased width of the contact surface 17 of the engagement section 14, the forces occurring when moving the drawer 3 can be distributed over an enlarged area, whereby the contact surface 17 of the engagement section 14 of the driver 13 is prevented from cutting into the wood material of the drawer 3.
[0049] The arrangement according to the invention comprises at least one drawer pull-out guide 4 and one drawer 3, wherein the drawer 3 is releasably fastened to the at least one pull-out rail 10 of the drawer pull-out guide 4 via the at least one fastening device 12.
[0050] The drawer 3 has at least one recess 15 with an inner wall 15a, wherein the at least one engagement section 14 of the driver 13 of the fastening device 12 is immersed in the at least one recess 15, wherein the at least one contact surface 17 bears against the at least one inner wall 15a of the recess 15. According to a preferred exemplary embodiment, it can be provided that the engagement section 14 of the driver 13 is immersed in the recess 15 without play in the longitudinal direction L of the at least one pull-out rail 10, and / or is immersed in the recess 15 with play in a direction transverse to the longitudinal direction L of the at least one pull-out rail 10.
[0051] According to a further embodiment, it can be provided that the drawer 3 has at least one drawer side wall 6a, 6b, wherein the at least one recess 15 is formed in the at least one drawer side wall 6a, 6b.
[0052] It is preferably provided that the at least one recess 15 of the drawer 3 is open towards a bottom side of the drawer 3.
[0053] Alternatively, the at least one recess 15 can also be arranged in the drawer bottom 8.
[0054] Fig. 2b shows the drawer guide 4 in a perspective view. The pull-out rail 10 to be connected to the drawer 3 is mounted so as to be movable in the longitudinal direction L relative to the stationary cabinet rail 9.
[0055] By means of a damping device 19, for example with a piston-cylinder unit, a spring-supported retraction movement of the pull-out rail 10 into the closed end position relative to the body rail 9 can be dampened.
[0056] At least one stop element 20 is arranged at the rear end of the pull-out rail 10. When the drawer 3 is mounted on the pull-out rail 10, the stop element 20 engages in a rear opening of the drawer 3, for example, in the rear wall 7 or in the drawer side wall 6a, 6b. In this way, the rear end region of the drawer 3 can be stabilized relative to the pull-out rail 10. To prevent unwanted cutting, the stop element 20 at the rear region of the pull-out rail 10 can be designed identically to the driver 13 of the fastening device 12.
[0057] At the front end region of the pull-out rail 10, at least one fastening device 12 with a driver 13 for releasably fastening the drawer 3 to the pull-out rail 10 is arranged, wherein the front region of the pull-out rail 10 is arranged adjacent to a front panel 5 of the drawer 3 in an assembled state of the drawer pull-out guide 4.
[0058] At least one adjustment device 11 with a movable, preferably rotatably mounted adjustment element 11a is arranged at the front end of the pull-out rail 10. By actuating, preferably by rotating, the adjustment element 11a, the position of the drawer 3 relative to the pull-out rail 10 can be adjusted.
[0059] In the present case, an inclination of the drawer 3 relative to the pull-out rail 10 can be adjusted by means of the at least one adjusting device 11.
[0060] An undesired lifting movement of the drawer 3 relative to the pull-out rail 10 can be prevented or limited by a lifting protection device 21.
[0061] In the exemplary embodiment shown, the lifting protection device 21 comprises at least one slider which is movable transversely to the longitudinal direction of the pull-out rail 10 and which, when the drawer 3 is in the assembled state, engages in a corresponding opening of the drawer 3 and thus prevents the drawer 3 from being lifted relative to the pull-out rail 10.
[0062] The at least one pull-out rail 10 has at least one support web 26 for a drawer bottom 8 of the drawer 3, wherein the at least one fastening web 23 (Fig. 2a) of the driver 13 is arranged in a plane parallel to the at least one support web 26, and / or wherein the at least one engagement section 14 is arranged transversely to the at least one support web 26. Fig. 3a shows the drawer pull-out guide 4 with the body rail 9 and the at least one pull-out rail 10 in a plan view.
[0063] By means of a spring device 22, preferably with at least one tension spring, the pull-out rail 10 can be retracted into a closed end position relative to the body rail 9.
[0064] By means of the damping device 19, preferably with a piston-cylinder unit, a movement of the pull-out rail 10 which can be retracted by means of the spring device 22 can be dampened.
[0065] The fastening device 12 with the driver 13 is arranged between the pull-out rail 10 and the mounting flange 25 of the carcass rail 9, wherein the driver 13 has an engagement section 14 which can be inserted into the recess 15 of the drawer 3.
[0066] Fig. 3b shows the area "A" framed in Fig. 3a in an enlarged view. The fastening web 23 is firmly connected to the pull-out rail 10, for example, welded to the pull-out rail 10.
[0067] The engagement section 14 of the driver 13 has at least one, preferably convex, contact surface 17, 17a for contact with an inner wall 15a of the recess 15 of the drawer 3.
[0068] According to one embodiment, it can be provided that the engagement section 14 of the driver 13 has at least two contact surfaces 17, 17a spaced apart from one another in the longitudinal direction L of the at least one pull-out rail 10.
[0069] Preferably, it can be provided that the at least two contact surfaces 17, 17a are formed substantially mirror-symmetrically to one another and / or are connected to one another via at least one central web 24. The engagement section 14 of the driver 13 can be formed in a substantially I-shaped, H-shaped, rectangular, or circular cross-section.
[0070] Fig. 3c shows the drawer pull-out guide 4 in a cross-sectional view.
[0071] The carcass rail 9 has at least one mounting flange 25, via which the carcass rail 9 is to be fastened to a furniture carcass 2.
[0072] The engaging portion 14 of the driver 13, which can be inserted into the recess 15 of the drawer 3, is arranged on the fastening web 23 via at least one connecting portion 16, the fastening web 23 being non-releasably and stationary fastened to the pull-out rail 10.
[0073] The engagement portion 14, the connecting portion 16 and the fastening web 23 are formed integrally with one another.
[0074] The engagement section 14 of the driver 13 has a center plane ME parallel to a longitudinal direction L of the at least one pull-out rail 10, wherein the connecting section 16 is arranged in the center plane ME of the engagement section 14.
[0075] The at least one contact surface 17, 17a of the engagement section 14 has a greater width in a direction transverse to the longitudinal direction L of the at least one pull-out rail 10 than a material thickness 18 of the fastening web 23.
[0076] According to possible embodiments, it can be provided that
[0077] - the engagement section 14 is formed symmetrically to the center plane ME, and / or
[0078] - the connecting section 16 is formed symmetrically to the center plane ME, and / or
[0079] - the connecting section 16 has a center plane ME parallel to a longitudinal direction L of the at least one pull-out rail 10, wherein the center plane ME of the connecting section 16 is arranged substantially congruent with the center plane ME of the engagement section 14.
[0080] According to a further embodiment, it can be provided that the at least one contact surface 17, 17a has a width transverse to the longitudinal direction L of the at least one pull-out rail 10, wherein the width of the contact surface 17, 17a is at least twice, preferably at least three times, as large as the material thickness 18 of the fastening web 23.
[0081] The fastening web 23 can be welded to the at least one pull-out rail 10, preferably to a side web 10a of the at least one pull-out rail 10.
[0082] The material thickness 18 of the fastening web 23 can be less than or equal to 2 mm, preferably 1.5 mm.
[0083] Fig. 4a-4c show various embodiments of a driver 13 for releasably coupling the drawer 3 with the pull-out rail 10 of a drawer pull-out guide 4.
[0084] Fig. 4a shows a driver 13 with an engagement portion 14, which can be substantially I-shaped or substantially H-shaped.
[0085] The engagement portion 14, the connecting portion 16 and the fastening web 23 are formed integrally with one another.
[0086] The engagement section 14 can have two contact surfaces 17, 17a spaced apart from one another in the longitudinal direction L of the pull-out rail 10.
[0087] The at least two contact surfaces 17, 17a are formed substantially mirror-symmetrically to one another and / or are connected to one another via at least one central web 24.
[0088] The connecting section 16 is in the embodiment shown the
[0089] Fig . 4a in the form of a tapered neck , wherein the center plane ME of the connecting portion 16 is arranged substantially congruent with the center plane ME of the engagement portion 14 .
[0090] Fig. 4b shows a driver 13 with an engagement portion 14 which is substantially rotationally symmetrical.
[0091] In the figure shown, the engagement portion 14 is cylindrical, preferably circular cylindrical.
[0092] In the embodiment shown in Fig. 4b, the connecting section 16 is designed in the form of a widening base, wherein the center plane ME of the connecting section 16 is arranged substantially congruent with the center plane ME of the engagement section 14.
[0093] Fig. 4c shows a driver 13 with an engagement portion 14 which is substantially cuboid-shaped.
[0094] In the embodiment shown in Fig. 4c, the connecting portion 16 is designed in the form of a tapered neck, wherein the center plane ME of the connecting portion 16 is arranged substantially congruent with the center plane ME of the engagement portion 14.
Claims
Patent claims 1. Drawer pull-out guide (4) for the movable storage of a drawer (3) relative to a furniture body (2), comprising: - at least one carcass rail (9) to be attached to a furniture carcass (2), - at least one pull-out rail (10) which is mounted so as to be movable relative to the body rail (9), - at least one fastening device (12) for releasably fastening a drawer (3) to the at least one pull-out rail (10), wherein the at least one fastening device (12) has at least one driver (13), - wherein the at least one driver (13) has an engagement section (14) which can be inserted into a recess (15) of the drawer (3), wherein the engagement section (14) is arranged on a fastening web (23) via at least one connecting section (16), wherein the fastening web (23) is permanently and stationary fastened to the pull-out rail (10), - wherein the engagement portion (14), the connecting portion (16) and the fastening web (23) are formed integrally with one another, - wherein the engagement portion (14) has at least one contact surface (17, 17a) for contact with an inner wall (15a) of the recess (15) of the drawer (3), - wherein the engagement section (14) has a center plane (ME) parallel to a longitudinal direction (L) of the at least one pull-out rail (10), wherein the connecting section (16) is arranged in the center plane (ME) of the engagement section (14), characterized in that the at least one contact surface (17) of the engagement section (14) has a greater width in a direction transverse to the longitudinal direction (L) of the at least one pull-out rail (10) than a material thickness (18) of the fastening web (23).
2. Drawer pull-out guide (4) according to claim 1, wherein the at least one contact surface (17, 17a) of the engagement portion (14) is convexly curved.
3. Drawer pull-out guide (4) according to claim 1 or 2, wherein - the engagement section (14) is formed symmetrically to the center plane (ME), and / or - the connecting section (16) is formed symmetrically to the center plane (ME), and / or - the connecting section (16) has a center plane (ME) parallel to a longitudinal direction (L) of the at least one pull-out rail (10), wherein the center plane (ME) of the connecting section (16) is arranged substantially congruent with the center plane (ME) of the engagement section (14).
4. Drawer pull-out guide (4) according to one of claims 1 to 3, wherein the engagement section (14) of the driver (13) has at least two contact surfaces (17, 17a) spaced apart from one another in the longitudinal direction (L) of the at least one pull-out rail (10), preferably wherein the at least two contact surfaces (17a, 17a) are designed substantially mirror-symmetrically to one another and / or are connected to one another via at least one central web (24).
5. Drawer pull-out guide (4) according to one of claims 1 to 4, wherein the at least one contact surface (17, 17a) of the engagement section (14) has a width transverse to the longitudinal direction (L) of the at least one pull-out rail (10), wherein the width of the contact surface (17, 17a) is at least twice, preferably at least three times, as large as the material thickness (18) of the fastening web (23).
6. Drawer pull-out guide (4) according to one of claims 1 to 5, wherein the engagement portion (14) of the driver (13) is formed in a cross-section substantially I-shaped, H-shaped, rectangular or circular.
7. Drawer pull-out guide (4) according to one of claims 1 to 6, wherein the at least one pull-out rail (10) has at least one support web (26) for a drawer bottom (8) of the drawer (3), wherein the at least one fastening web (23) of the driver (13) is arranged in a plane parallel to the at least one support web (26), and / or wherein the at least one engagement section (14) of the driver (13) is arranged transversely to the at least one support web (26) of the pull-out rail (10).
8. Drawer pull-out guide (4) according to one of claims 1 to 7, wherein the fastening web (23) is welded to the at least one pull-out rail (10), preferably to a side web (10a) of the at least one pull-out rail (10).
9. Drawer pull-out guide (4) according to one of claims 1 to 8, wherein the material thickness (18) of the fastening web (23) is less than or equal to 2 mm, preferably 1.5 mm.
10. Drawer pull-out guide (4) according to one of claims 1 to 9, wherein the driver (13) of the fastening device (12) is arranged in a front region of the at least one pull-out rail (10), wherein the front region of the pull-out rail (10) is arranged adjacent to a front panel (5) of the drawer (3) in an assembled state of the drawer pull-out guide (4).
11. Drawer pull-out guide (4) according to one of claims 1 to 10, wherein the drawer pull-out guide (4) - at least one spring device (22) for retracting the at least one pull-out rail (10) into a closed end position relative to the body rail (9), and / or - at least one damping device (19) for damping a movement of the at least one pull-out rail (10), and / or - at least one stop element (20) arranged on the at least one pull-out rail (10) and immersible into a recess of the drawer (3) for stabilising a rear end region of the drawer (3) relative to at least one pull-out rail (10).
12. Arrangement with at least one drawer pull-out guide (4) according to one of claims 1 to 11 and with a drawer (3), wherein the drawer (3) is detachably fastened to the at least one pull-out rail (10) of the drawer pull-out guide (4) via the at least one fastening device (12), wherein the drawer (3) has at least one recess (15) with an inner wall (15a), wherein the at least one engagement section (14) of the driver (13) of the fastening device (12) is immersed in the at least one recess (15) of the drawer (3), wherein the at least one contact surface (17, 17a) of the engagement section (14) rests against the at least one inner wall (15a) of the recess (15) of the drawer (3).
13. Arrangement according to claim 12, wherein the engagement section (14) of the driver (13) is immersed in the recess (15) of the drawer (3) without play in the longitudinal direction (L) of the at least one pull-out rail (10), and / or is immersed in the recess (15) of the drawer (3) with play in a direction transverse to the longitudinal direction (L) of the at least one pull-out rail (10).
14. Arrangement according to claim 12 or 13, wherein the drawer (3) has at least one drawer side wall (6a, 6b), wherein the at least one recess (15) is formed in the at least one drawer side wall (6a, 6b), preferably wherein the at least one recess (15) is open towards an underside of the drawer (3).