Fastening method and accessory for carrying out said method
Patent Information
- Application Number
- EP2023837946
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2023-01-31
- Filing Date
- 2023-11-27
- Publication Date
- 2025-12-10
AI Technical Summary
Existing fastening methods for body rails on furniture, which use mushroom head dowels locking in keyhole recesses, face issues with the dowels becoming loose when moved longitudinally, particularly in applications like drawer guides where keyhole recesses are aligned parallel to the pull-out direction.
The method involves installing longitudinal pull-out locks in keyhole recesses with locking or clamping lugs on the body rail that protrude and lock into the pull-out locks, allowing for tool-free assembly and disassembly, and using a one-piece design with elongated hole-like punchings and 90-degree bendable lugs to ensure secure fixation, along with cross-slot-like locking recesses for added stability.
This solution provides a secure, cost-effective, and tool-free fastening system that prevents the body rail from moving longitudinally within the keyhole recesses, ensuring a firm lock and increased resilience against forces parallel to the wall, suitable for various orientations of keyhole recesses and materials like fiberboard.
Smart Images
Figure DE2023000151_08082024_PF_FP
Abstract
Description
[0001]08-12-2023-35811901—HauPtPmst -0015 PCT / DE2023 / 000151 BW 412 / 23 PCT Fastening method and aids for carrying out the method Description: The invention relates to a fastening method for a cabinet rail to a wall of a furniture carcass and to aids for carrying out the method. Fastening methods in which mushroom-head dowels lock into keyhole recesses are known and proven in a wide variety of embodiments. The keyhole recesses, for example, made in a wall, engage with undercuts over the mushroom heads of the inserted dowels and reliably prevent the dowels from being pulled out perpendicular to the wall. The possibility of such a mushroom-head dowel shifting in the longitudinal extent of the keyhole recess is problematic. Such shifting can certainly lead to the connection becoming loose.This applies, for example, to the fastening of a cabinet rail to a guide for a drawer when the cabinet rail is fastened in keyhole recesses that are arranged in a row and with the same longitudinal extent parallel to the pull-out direction of the drawer. In this regard, a method for fastening a cabinet rail to a wall of a furniture carcass and associated aids for carrying out the method provide a remedy, in which the claim initially states that pull-out safety devices are inserted into keyhole recesses in the wall with the same 08-12-2 23-3S811901-HauPtPost-0016 PCT / DE2023 / 000151 longitudinal extent and that locking or clamping lugs protruding from the cabinet rail are locked into the pull-out safety devices on the carcass side. A particular advantage of the fastening method according to the invention is the possibility of tool-free assembly and disassembly of the cabinet rail on the wall.The insertion of the keyhole recesses and the pull-out protection devices incorporated therein, as well as the dimensions of the cabinet rail to be secured therein, must naturally be coordinated with one another. Smaller tolerances can be compensated for if, according to claim 2, the locking or clamping lugs, which are preferably arranged in a line, are made of a flat material, in particular are formed integrally with the cabinet rail. For this purpose, for example, oblong hole-like cutouts can be provided in the cabinet rail, with a locking or clamping lug, which is preferably bent by 90°, remaining at one end. Such a locking or clamping lug can be extended by cutting into the front of the cutout in the cabinet rail. Since a locking connection is usually superior to a clamping connection, it is further provided that a locking lug has two opposing locking receptacles.08-12-2023-35811,901-HauPtPost-0017 PCT / DE2023 / 000151 Such a cabinet rail can be manufactured in a simple, cost-effective manner and yet securely lock into the pull-out safety device. Such a pull-out safety device is designed as a single piece according to the claim and has a section similar to a mushroom-head dowel, to which a shoulder is connected, whereby the pull-out safety device has at least the length of the keyhole recess. The single-piece design and the associated use of a single material allow for cost-effective production and separate disposal of the pull-out safety devices. These additional measures ensure that the pull-out safety device cannot shift along the length of the keyhole recess.This applies in particular if the pull-out protection is tensioned lengthwise in the keyhole recess, for example by a small upper length. Furthermore, it is provided that the section is at least partially flush with the top of the wall after being inserted into a keyhole recess and that the section has a locking or clamping recess for receiving the locking or clamping nose of the carcass rail. This ensures that the carcass rail lies flat on the top of the wall when locking. 0 - 12-2023-3581 901- - tPast-0018 PCT / DE2023 / 000151 In a further development of the pull-out protection, it is provided that the locking or clamping recess is designed like a cross-slot, with two slots crossing in the middle at an angle of 90. This makes it possible to secure a carcass rail both lengthwise of the keyhole recesses and transversely to them.In contrast to the section being flush with the top of the wall, the shoulder can, in a side view, have a wedge engaging in the cutout. Such a wedge increases the load-bearing capacity of the connection in forces acting parallel to the top of the wall. If the wall is made of fiberboard, as is common with furniture, for example, the shoulder can further be provided with a longitudinally protruding nose on the underside. Such a nose will press into the fiber material of the wall, whereby the pull-out safety device is securely held in the keyhole recess. The fastening of a cabinet rail to a wall of a furniture carcass is further explained with reference to the drawing, which merely illustrates exemplary embodiments. The drawing shows: Fig. 1: a view of a carcass wall with a carcass rail, Fig. 2: a section along line II, II in Fig. 1, Fig. 3: a front view, partially in section, Fig.4: an enlarged section IV in Fig. 3, 08-12-2023-358111301-HauPtPost-0019 PCT / DE2023 / 000151 Fig. 5: an enlarged view of the left side in Fig. 2, Fig. a view of a carcass strip, Fig. 7: a view according to arrow VII in Fig. Fig. 8: in an enlarged view of a punched out section, Fig. 9: an enlarged front view of a carcass rail; Fig. 10: an isometric view of a pull-out safety device, Fig. 11: a side view, Fig. 12: a front view, Fig. 13: a top view, Fig. 14: a plan view of a variant of the attachment of a cabinet rail to a wall, Fig. 15: a section along the line XV,XV in Fig. 14, Fig. 16: an enlarged view of the left side of the cabinet rail in Fig. 14 and Fig. 17: a front view of the cabinet rail according to Fig. 14.The figure shows a wall of a furniture carcass (not shown in detail) with two rows 2, 3 of keyhole cutouts 08-12-2023-35811901-HauPtPost-0020 PCT / DE2023 / 000151 4, 5. The lower row of keyhole cutouts is used to secure a carcass rail. For example, the carcass rail supports a guide rail for a roller-mounted cage for pulling out a drawer. Pull-out locks are inserted into the keyhole cutouts of the lower row 3, to which the carcass rail is secured. For this purpose, the carcass rail has locking lugs 10 on the carcass side. The locking lugs 10 are formed integrally with the carcass rail. They are manufactured by means of a slot-like punching out 11 in the carcass rail, with a locking lug 10 that can be bent through 90° remaining at one end. The locking lug 10 is extended by two front-side incisions 12, 13, thus resulting in an exact bending line 14.The locking lug 10 is further provided with two locking recesses 15, 16. In the locking recesses 15, 16, locking lugs 20, 21 engage in a locking recess 22 of the pull-out safety device, thus securely locking the cabinet rail. A variant of a pull-out safety device 25 is further explained with reference to Figures 10-13. The pull-out safety device 25 has a section 26 similar to a mushroom-head dowel. The cap 27 engages under the undercuts of the keyhole recesses 5 in a conventional manner. A shoulder 28 adjoins the section 25. In the exemplary embodiment of the pull-out protection device 25, a lug 29 protrudes longitudinally from the underside of the projection 28. If the pull-out protection device 25 completely fills the keyhole recess, at least longitudinally, this lug 29 will press into, for example, the fiber material of the wall.In addition, the pull-out protection device 25 can also have a certain excess length so that the pull-out protection device 25 is tensioned longitudinally within a keyhole recess. The pull-out protection device 25 is provided with a Phillips-shaped locking recess 35 for receiving a locking lug 10 of the cabinet rail. To ensure that the cabinet rail can end flush with the top of the wall, one side 36 of the section 26 ends in a plane with the top of the wall. In contrast, the shoulder 28 forms two wedges 37, 38 that engage in the punched-out section 11 in the cabinet rail. Forces parallel to the top of the wall are optimally absorbed by this measure. A variant of the attachment of a cabinet rail 40 to a wall 41 is explained in more detail with reference to Figures 14 to 17. Two rows 42, 43 of keyhole recesses 44, 45 are made in the wall 41.Due to the cross-slot-like locking recess, identically constructed pull-out locks 46, 47 can be used to secure the cabinet rail 40 with the pull-out lock 25 explained with reference to Figures 10 to 13, even if the longitudinal orientations of the keyhole recesses 44, 45 and the 08-12-2023-358 1901-Hauptpost-0022 PCT / DE2023 / 000151 of the cabinet rail 40 run transversely to one another. The locking lugs 48 of the cabinet rail 40 are formed by L-shaped punched-out portions 49 on the edges and by bending the resulting tabs by 90°. Locking lugs engaging in the provided locking recesses 50, 51 in the locking recesses of the pull-out locks 46, 47 secure the locking lugs 48 of the cabinet rail 40.
Claims
08-12-2023-35811901-HauPtPost-0024 PCT / DE2023 / 000151 EW 412 / 23 PCT Fastening method and aids for carrying out the claims:
1. Fastening method of a carcass rail ( to a wall ( of a furniture carcass, characterized in that pull-out safeguards ( are introduced into keyhole recesses ( in the wall ( with the same longitudinal extent and that locking ( 10) or clamping lugs protruding from the carcass side of the carcass rail are locked in the pull-out safeguards ( .
2. Carcass rail, in particular for carrying out the method according to claim 1, characterized by locking ( 10) or clamping lugs made of a flat material.
3. Carcass rail according to claim 2, characterized by punched out portions ( 11) in which a locking ( 10) or clamping lug to be bent remains at one end.Carcass rail according to claim 1 or 3, characterized by two end-face incisions (12, 13) on the punched-out portion (11) in the carcass rail (6) that extend the locking lug (10) or clamping lug.
5. Carcass rail according to one or more of claims 2 to 4, characterized in that a locking lug (10) has two opposing locking recesses (15, 16).
6. Pull-out protection, in particular for carrying out the method according to claim 1, characterized by a one-piece design with a section (26) according to Art. 08-12-2023-3S811S01-HauPtPost-002S PCT / DE2023 / 000151 a mushroom head dowel, to which a shoulder (28) is connected, wherein the pull-out protection (25) has at least the length of the keyhole recess (.
7. Pull-out protection according to claim 1, characterized in that it is braced in the keyhole recess ( in its longitudinal extension).
8. Pull-out protection according to claim 1 or 7, characterized in that the section (26) after being introduced into a keyhole recess ( is at least partially flush with the top of the wall and that the section (26) has a locking (25) or clamping recess for receiving the locking (10) or clamping nose of the carcass rail (.
9. Pull-out protection according to claim 8, characterized in that the locking (25) or The clamping recess is designed like a cross slot. 10.Pull-out protection device according to one or more of claims 1 to 10, characterized in that the projection (28) has, in a side view, a wedge (37, 38) engaging in the cutout (11).
11. Pull-out protection device according to one or more of claims 1 to 10, characterized in that the projection (28) has a nose (29) projecting longitudinally on its underside.