DRAWER PULL-OUT VERSION

Description

[0001] The present invention according to claim 1 relates to a drawer extension guide for the movable mounting of a drawer on a furniture body, comprising: a cabinet rail to be attached to the furniture carcass, at least one drawer rail to be connected to the drawer, which is mounted to be displaceable in a longitudinal direction relative to the cabinet rail, and optionally at least one intermediate rail arranged between the cabinet rail and the drawer rail, wherein at least one of the rails, preferably the cabinet rail, the intermediate rail and / or the at least one drawer rail, has in a cross-section normal to the longitudinal direction at least one profile formed from at least one flat sheet metal with two longitudinal edges running parallel to each other.

[0002] Furthermore, the invention relates to a drawer side wall with a drawer extension guide of the type to be described and with a hollow chamber profile which is connected or connectable to the at least one drawer rail of the drawer extension guide.

[0003] The rails of a drawer slide are often made from a flat sheet of metal, which is then bent and / or formed into a profiled rail. The finished profiles absorb the loads on the drawer slide in both horizontal and vertical directions, ensuring stable movement of the drawer.

[0004] A general problem is the amount of metal required for manufacturing drawer slides. Excessive material usage leads to increased weight and higher costs in mass production. Therefore, it is desirable to use as little metal as possible, especially since resource-efficient use of raw materials offers both ecological and economic advantages.

[0005] EP 0 363 583 A1 discloses a drawer slide guide in which a center rail is movably mounted between the cabinet rail and the extension rail. The center rail has two lateral guides in cross-section for the movement of rollers. Each of the lateral guides of the center rail is formed by a fold with double the material thickness. A disadvantage of this design is that the bending process for manufacturing the center rail is relatively complex. Relevant prior art can be found in particular in the following documents: DE202009003459U1, US2006 / 214548A1, US2011 / 188788A1, EP2168454A1, CN202820340U, US2003 / 071548A1, US2011 / 241515A1, and US2010 / 026154A1.

[0006] The object of the present invention is to provide a drawer extension guide of the type mentioned above while avoiding the disadvantages mentioned above.

[0007] This is achieved according to the invention by the features of claim 1. Further advantageous embodiments of the invention are specified in the dependent claims.

[0008] According to the invention, the profile of the at least one rail has at least one fold with at least twice the material thickness on at least one longitudinal edge, preferably on both longitudinal edges.

[0009] In other words, the profile of the cabinet rail and / or the drawer rail and / or the center rail has a fold with a wall thickness of at least twice the thickness on at least one longitudinal edge, preferably on both longitudinal edges. This allows for a simple bending process of the sheet metal and increases the stiffness of the profile in the fold area. Furthermore, the fold creates a rounded edge, reducing the risk of injury from an otherwise sharp longitudinal edge.

[0010] A particular advantage of the invention lies in the fact that thinner sheet metal than usual can be used for manufacturing the drawer slide guide (for example, sheets with a thickness of 0.7 mm instead of sheets with a thickness of 1.5 mm). The at least one fold increases the stiffness of the highly stressed areas of the cabinet rail and / or the drawer rail and / or the center rail. These highly stressed areas include, in particular, the raceways of the cabinet rail and / or the drawer rail and / or the center rail, on which rolling elements (especially rolling elements of a carriage) can roll.

[0011] Assuming, for example, that a thinner sheet metal of 0.7 mm thickness is used, the highly stressed areas will have a thickness of 1.4 mm due to the overlay. The robust raceways ensure optimal guidance of the rolling elements along the rails. The remaining areas of the rails, which are not subject to heavy loads, can be manufactured with a simple, reduced material thickness (i.e., 0.7 mm). These measures significantly reduce material usage, weight, and manufacturing costs for the drawer slide.

[0012] According to one embodiment, the drawer extension guide may have at least one rolling element which is movable at least section by section in the longitudinal direction along the at least one fold.

[0013] Preferably, it can be provided that at least one carriage arranged between the body rail and the at least one drawer rail is provided, in which at least one rolling element is arranged, and / or at least one rolling element rotatably mounted about an axis of rotation is provided, wherein the axis of rotation of the rolling element is aligned transversely to a longitudinal edge.

[0014] Further details and advantages of the present invention will become apparent from the following description of the figures. Figs. 1a, 1b show a piece of furniture with drawers and a drawer slide in perspective views, and Figs. 2a, 2b show a cross-section of the drawer slide with unloaded and loaded rolling elements, Figs. 3a, 3b the body rail of the drawer slide in a perspective view and in a cross-sectional view.

[0015] Fig. 1a Figure 1 shows a perspective view of a piece of furniture 1 with a furniture carcass 2, in which drawers 3 are mounted on drawer slides 4 so that they can move relative to the furniture carcass 2. For clarity, the topmost drawer 3 is not shown. Each drawer 3 has a front panel 5, a drawer bottom 6, drawer side panels 7, and a back panel 8.

[0016] The drawer slides 4 comprise a cabinet rail 9, which is to be attached to the furniture carcass 2 via a mounting section 11. Furthermore, at least one drawer rail 10 is provided, which is to be connected to the drawer 3 and which is mounted to be movable relative to the stationary cabinet rail 9.

[0017] If necessary, the drawer slide 4 may also have a center rail which is movable between the body rail 9 and the drawer rail 10 and through which a full extension of the drawer 3 in relation to the furniture body 2 is possible.

[0018] The drawer side walls 7 can each have a hollow chamber profile 7a, which is connected or connectable to at least one drawer rail 10 of the drawer extension guide 4.

[0019] Fig. 1b Figure 4 shows the drawer slide 4 in a perspective view, showing the cabinet rail 9, which is to be attached to the furniture carcass 2, and the drawer rail 10, which is movable in the longitudinal direction (L). The cabinet rail 9 is to be attached to the furniture carcass 2 via a mounting section 11.

[0020] The fastening section 11 can have at least one, preferably circular, opening 12 for the passage of a screw, through which the fastening section 11 can be screwed to the furniture body 2.

[0021] The fastening section 11, the body rail 9 and the drawer rail 10 can each have at least one stiffening bead 13.

[0022] At least one opening 12 for the passage of a screw can be arranged between two stiffening beads 13, thereby increasing the section modulus in this area.

[0023] Fig. 2a The drawer slide 4 is shown in a cross-section perpendicular to the longitudinal direction (L). Visible are the cabinet rail 9, which is to be attached to the furniture carcass 2, and the drawer rail 10, which is movable relative to the cabinet rail 9.

[0024] The fastening section 11 of the cabinet rail 9 has a fastening side 19 which, when the cabinet rail 9 is fastened to the furniture carcass 2, can be applied to the furniture carcass 2 at least section by section.

[0025] The cabinet rail 9 and / or the drawer rail 10 is / are bent from a flat sheet metal with two longitudinal edges 14a, 14b (drawer rail 10) and 15a, 15b (cabinet rail 9) into a profile 9a, 10a. The flat sheet metal has a material thickness (X).

[0026] The flat sheet metal from which the profile is formed can, for example, have a material thickness (X) between 0.5 mm and 1.0 mm, preferably a material thickness (X) of 0.7 mm.

[0027] The profile 9a of the cabinet rail 9 and / or the profile 10a of the drawer rail 10 has at least one fold 16, 17 with a material thickness of at least twice (2X) on at least one longitudinal edge 14a, 14b, 15a, 15b, preferably on both longitudinal edges 14a, 14b, 15a, 15b. Preferably, the at least one fold 16, 17 has exactly twice the material thickness (2X).

[0028] If appropriate, the envelope 16, 17 can also be folded three or more times, resulting in a material thickness (X) that is three or more times greater.

[0029] At least one fold 16, 17 can be arranged on a longitudinal edge 15b of the cabinet rail 9, wherein this fold 16, 17 can be attached to the cabinet rail 9 when it is fastened to the furniture carcass 2.

[0030] According to one embodiment, it can be provided that the at least one fold 16, 17 has at least two sheet metal sections 24a, 24b that abut each other at least partially on the at least one longitudinal edge 14a, 14b, 15a, 15b.

[0031] The at least one loading rail 10 can have at least one cover 16, 17 with at least twice the material thickness (2X) on both longitudinal edges 14a, 14b, wherein the two covers 16, 17 are oriented transversely, preferably substantially at right angles, to each other and / or wherein one of the two covers 16, 17 faces inwards and the other of the two covers 16, 17 faces outwards.

[0032] At least one fold 16, 17 has at least one bend 18 extending in the longitudinal direction (L) at the at least one longitudinal edge 14a, 14b, 15a, 15b in a cross-section normal to the longitudinal direction (L), preferably wherein the at least one fold 16, 17 is formed at at least one longitudinal edge 15a of the body rail 9.

[0033] The cabinet rail 9 can have at least one fastening section 11 with a fastening side 19, which, when the cabinet rail 9 is fastened to the furniture cabinet 2, can be applied to the furniture cabinet 2 at least section by section.

[0034] The at least one fastening section 11 can have at least one, preferably circular, opening 12 for the passage of a fastening means, preferably a screw.

[0035] According to one embodiment, it can be provided that the at least one opening 12 on one of the fastening sides 19, which is spaced apart from the second side 20 by a material thickness (X) of the fastening section 11, is surrounded by a bead 21 which projects transversely from the second side 20.

[0036] The bead 21 surrounding the opening 12 significantly improves the stiffness of the fastening section 11 in the area of ​​the opening 12, which is particularly advantageous when used with sheets of thin material thickness (X).

[0037] At least one stiffening rib 13 can have a longitudinal direction extending transversely to the longitudinal direction (L) of the cabinet rail 9. At least one or more stiffening ribs 13 can be arranged on the vertical leg of the fastening section 11 and / or on the transverse leg of the fastening section 11.

[0038] Fig. 2b The drawer slide 4 shows according to Fig. 2a in a cross-section with equipped rolling elements 23a, 23b, 23c.

[0039] Preferably, the rolling elements 23a, 23b, 23c are mounted in a common carriage 22, wherein the carriage 22 is mounted so as to be movable between the body rail 9 and the at least one drawer rail 10.

[0040] According to possible embodiments, it can be provided that at least one rolling element 23a is rotatable about a horizontal axis in the mounting position and can be moved along the rebate 16 of the loading rail 10.

[0041] At least one further rolling element 23a is rotatable about a horizontal axis in the mounting position and is movable along the rebate 17 of the body rail 9.

[0042] At least one further rolling element 23c is rotatable about a vertical axis in the mounting position and is movable along a section of the body rail 9 with a double wall thickness (2X).

[0043] Fig. 3a Figure 9a shows the profile 9a of the cabinet rail 9 in a perspective view. The fastening section 11 for attaching the cabinet rail 9 has a fastening side 19 for contact with the furniture carcass 2. The fastening section 11 has at least one opening 12 for the passage of a fastening element, in particular a screw, through which the cabinet rail 9 is to be fastened to the furniture carcass 2.

[0044] The at least one opening 12 is surrounded on one of the fastening sides 19 by a second side 20, spaced apart by a material thickness (X), by a bead 21 which projects transversely from the second side 20 of the fastening section 11. The screw head of a screw for fastening the fastening section 11 to the furniture part 2 is, in an assembled state, at least partially, preferably substantially completely, received within the annular bead 21.

[0045] The adjacent sheet metal sections 24a, 24b of the cover 16, 17 are joined together by at least one common punch 25, 26. In this way, the cover 16, 17 can be further stabilized.

[0046] According to one embodiment, two punched holes 25, 26 are provided spaced apart from each other in the longitudinal direction (L).

[0047] According to preferred embodiments, it may be provided that the at least one punching 25, 26 is arranged at one end of the profile 9a of the body rail 9 and / or of the profile 10a of the at least one drawer rail 10, and / or at least two common punchings 25, 26 are provided, preferably wherein the at least two punchings 25, 26 are mirror images of each other, and / or at least one carriage 22 ( Fig. 2b ) is provided and the at least one punching 25, 26 forms a stop to limit a travel path of the at least one carriage 22, and / or the at least one punching 25, 26 is designed as an angled tab.

[0048] The at least one punching 25, 26 can therefore perform a dual function. On the one hand, the punching 25, 26 serves to stabilize the adjacent sheet metal sections 24a, 24b of the cover 16, 17. On the other hand, the laterally projecting punching 25, 26 is designed to limit the longitudinal (L) travel path of the carriage 22. The carriage 11 is given a defined end position by the punching 25, 26 and consequently cannot travel beyond one end of the cabinet rail 9 and / or the at least one drawer rail 10.

[0049] Fig. 3b The drawer slide 4 shows according to Fig. 3ain a cross-section. On the fastening side 19 of the fastening section 11 and adjacent to the at least one opening 12, at least one recess 27 is arranged for the partial collection of any chipping material that may accumulate. In this way, when the fastening section 11 is screwed in, unwanted lifting of the fastening section 11 from the furniture part 2 can be prevented.

Claims

1. A drawer pull-out guide (4) for movably supporting a drawer (3) on a furniture carcass (2), comprising: - a carcass rail (9) configured to be fixed to the furniture carcass (2), - at least one drawer rail (10) configured to be connected to the drawer (3), the at least one drawer rail (10) being displaceably supported relative to the carcass rail (9) in a longitudinal direction (L), and optionally at least one central rail arranged between the carcass rail (9) and the drawer rail (10), - wherein at least one of the rails, preferably the carcass rail (9), the central rail and / or the at least one drawer rail (10), in a cross-section extending perpendicular to the longitudinal direction (L), includes at least one profile (9a, 10a) formed by at least one flat sheet metal having two longitudinal edges (14a, 14b, 15a, 15b) extending parallel to each other, - wherein the profile (9a, 10a) of the at least one rail (9, 10), on at least one longitudinal edge (14a, 14b, 15a, 15b), preferably on both longitudinal edges (14a, 14b, 15a, 15b), includes at least one foldover (16, 17) having at least a doubled material thickness (2X), characterized in that the at least one foldover (16, 17), on the at least one longitudinal edge (14a, 14b, 15a, 15b), in a cross-section extending perpendicular to the longitudinal direction (L), includes at least one kink (18) extending in the longitudinal direction (L), wherein the carcass rail (9) includes at least one fastening portion (11) having a fastening side (19) configured to bear at least partially against the furniture carcass (2) when the carcass rail (9) is mounted to the furniture carcass (2), wherein the at least one fastening portion (11) of the carcass rail (9) includes a foldover (16, 17) arranged on a longitudinal edge (14a, 14b, 15a, 15b) to bear against the furniture carcass (2).

2. The drawer pull-out guide (4) according to claim 1, characterized in that the drawer pull-out guide (4) includes at least one rolling body (23a, 23b, 23c) which is displaceable at least over a region along the at least one foldover (16, 17) in the longitudinal direction (L).

3. The drawer pull-out guide (4) according to claim 1 or 2, characterized in that - at least one running carriage (22) is provided, the at least one running carriage (22) being arranged between the carcass rail (9) and the at least one drawer rail (10), and at least one rolling body (23a, 23b, 23c) is arranged in the at least one running carriage (22), and / or - at least one rolling body (23a, 23b, 23c) is provided, the at least one rolling body (23a, 23b, 23c) being rotatably supported about a rotational axis aligned transversely to a longitudinal edge (14a, 14b, 15a, 15b).

4. The drawer pull-out guide (4) according to one of the claims 1 to 3, characterized in that the at least one foldover (16, 17) is arranged on at least one longitudinal edge (14a, 14b, 15a, 15b) of the carcass rail (9), wherein the foldover (16, 17) is configured to bear against the furniture carcass (2) when the carcass rail (9) is mounted.

5. The drawer pull-out guide (4) according to one of the claims 1 to 4, characterized in that the at least one foldover (16, 17) is formed on the at least one longitudinal edge (14a, 14b, 15a, 15b) by edging or by bending.

6. The drawer pull-out guide (4) according to one of the claims 1 to 5, characterized in that the at least one foldover (16, 17), on the least one longitudinal edge (14a, 14b, 15a, 15b), includes at least two sheet metal portions (24a, 24b) bearing at least partially against each other.

7. The drawer pull-out guide (4) according to claim 6, characterized in that the at least two sheet metal portions (24a, 24b) include at least one common punch (25, 26).

8. The drawer pull-out guide (4) according to claim 7, characterized in that - the at least one punch (25, 26) is arranged on an end of the profile (9a) of the carcass rail (9) and / or of the profile (10a) of the at least one drawer rail (10), and / or - at least two common punches (25, 26) are provided, preferably wherein the at least two punches (25, 26) are configured to be mirror inverted to each other, and / or - at least one running carriage (22) is provided, and the at least one punch (25, 26) forms an abutment configured to limit a travel path of the at least one running carriage (22), and / or - the at least one punch (25, 26) is configured as an angled tab.

9. The drawer pull-out guide (4) according to one of the claims 1 to 8, characterized in that the flat sheet metal, from which the profile (9a, 10a) is formed, has a material thickness (X) of between 0.5 mm and 1.0 mm, preferably a material thickness (X) of 0.7 mm.

10. The drawer pull-out guide (4) according to one of the claims 1 to 9, characterized in that the at least one drawer rail (10), on both longitudinal edges (14a, 14b), includes at least one foldover (16, 17) having at least a doubled material thickness (2X), wherein the two foldovers (16, 17) are aligned transversely, preferably substantially perpendicularly, to each other, and / or wherein one of the two foldovers (16, 17) faces towards the inside and the other of the two foldovers (16, 17) faces towards the outside.

11. The drawer pull-out guide (4) according to one of the claims 1 to 10, characterized in that the at least one foldover (16, 17) is formed on the at least one longitudinal edge (15a, 15b) of the carcass rail (9).

12. The drawer pull-out guide (4) according to one of the claims 1 to 11, characterized in that the carcass rail (9) includes at least one fastening portion (11) having a fastening side (19) configured to bear at least partially against the furniture carcass (2) when the carcass rail (9) is mounted to the furniture carcass (2), wherein the at least one fastening portion (11) includes at least one, preferably circular, opening (12) for the passage of a fastener, preferably of a screw.

13. The drawer pull-out guide (4) according to claim 12, characterized in that the at least one opening (12), on a second side (20) spaced apart from the fastening side (19) by a material thickness (X) of the fastening portion (11), is surrounded by bulge (21) projecting transversely from the second side (20).

14. A drawer sidewall (7) with a drawer pull-out guide (4) according to one of the claims 1 to 13, and with a hollow chamber profile (7a) which is connected or which is configured to be connected to the at least one drawer rail (10) of the drawer pull-out guide (4).