Drawer pull-out guide
The drawer pull-out guide addresses curvature and material inefficiencies by symmetrical reduction in thickness for end and strip sections, enabling efficient, stable, and damage-free mounting with countersunk holes.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- JULIUS BLUM GMBH
- Filing Date
- 2025-11-14
- Publication Date
- 2026-06-11
Smart Images
Figure AT2025060422_11062026_PF_FP_ABST
Abstract
Description
[0001] Drawer pull-out guide
[0002] The present invention relates to a drawer pull-out guide for moving a drawer relative to a furniture body, comprising:
[0003] - at least one cabinet rail,
[0004] - at least one guide rail that can be moved relative to the body rail,
[0005] - wherein the at least one cabinet rail has a support section for supporting the at least one guide rail and at least one fastening section for fastening the at least one cabinet rail to the furniture cabinet,
[0006] - wherein the at least one fastening section has at least one strip-shaped section with a reduced material thickness compared to the material thickness of the supporting section and at least one end section for contact with the furniture body, wherein the at least one end section runs substantially parallel to the strip-shaped section.
[0007] Furthermore, the invention relates to a piece of furniture comprising a furniture body, at least one drawer movable relative to the furniture body, and at least one drawer pull-out guide of the type to be described.
[0008] Finally, the invention relates to a method for manufacturing a body rail of a drawer slide guide of the type in question.
[0009] WO 2010 / 129974 of the applicant discloses a drawer slide with a cabinet rail to be attached to a furniture carcass, which has a support section for the movable mounting of a pull-out guide rail and a fastening section for attaching the cabinet rail to a furniture carcass. Within the fastening section, a strip-shaped section with a reduced material thickness compared to the support section is arranged, with rows of holes for screws passing through. The advantage of the strip-shaped section with reduced material thickness is that it reduces the material consumption for manufacturing the cabinet rail, thus making the cabinet rail more resource-efficient and cost-effective to produce.Furthermore, the strip-shaped section with reduced material thickness creates a gap between the cabinet rail and the furniture carcass, allowing any shavings produced by the screw to be collected when the screw is inserted. Adjacent to the strip-shaped section, the cabinet rail has an end section with no reduced material thickness, designed for stable contact with the furniture carcass.
[0010] One disadvantage of the aforementioned state of the art is that, due to the reduced material thickness of the strip-shaped section, special screws with a smaller screw head must be used to attach the cabinet rail to the furniture body in order to prevent the drawer side wall from rubbing against the screw heads and thus damaging the drawer side wall when moving a drawer between a closed and an open position.
[0011] The production of the strip-shaped section with reduced material thickness is usually carried out using a rolling mill, in which a flat sheet of metal is passed under pressure between several rollers. If the pressure on the sheet is sufficiently high, plastic deformation, i.e., permanent deformation, occurs. During the rolling process, sheet material is displaced to the end section of the cabinet rail, which can result in an uneven ridge at the end. This ridge must be cut off to create a clean edge, requiring an additional work step and resulting in the loss of valuable sheet metal.
[0012] The thicker end section adjacent to the strip-shaped portion results in asymmetrical processing of a flat sheet during the rolling process. This means that the cabinet rail may acquire an undesirable curvature during the rolling process. Any curvature of the cabinet rail also negatively affects the support of the guide rail, because the extendable guide rail can unintentionally move towards the open position when the cabinet rail is mounted, due to the curvature. Furthermore, material consumption is increased for a cabinet rail with a thicker end section.
[0013] The object of the present invention is therefore to propose a drawer pull-out guide of the type mentioned at the outset, in which at least one of the above disadvantages is eliminated.
[0014] This is achieved according to the invention by the features of claim 1. Further advantageous embodiments of the present invention are defined in the dependent claims.
[0015] According to the invention, it is provided that the at least one end section has a reduced material thickness compared to the material thickness of the supporting section.
[0016] In other words, the highly stressed support section for the at least one guide rail can still be built to be robust, whereas the strip-shaped section and the end section of the mounting section are made with a reduced material thickness compared to the support section. This results in significant material savings in the serial production of the cabinet rail.
[0017] Furthermore, the production of the strip-shaped section and the end section can be simplified because symmetrical processing and uniform pressure loading of the flat sheet during the rolling process are possible.
[0018] For example, the strip-shaped section and the end section are formed at a first edge of the flat sheet. At a second edge of the flat sheet, preferably mirror-symmetrical to a central plane of the flat sheet, at least one further strip-shaped section with a material thickness reduced compared to the material thickness of the sheet and at least one further end section with a material thickness reduced compared to the material thickness of the sheet are formed.
[0019] Thus, both edges of the flat sheet, extending to the outer longitudinal edges, can be simultaneously provided with areas of reduced material thickness during the rolling process, with these areas forming the strip-shaped section and the end section. Symmetrical processing of the flat sheet also prevents unwanted curvature.
[0020] Subsequently, the flat sheet metal is divided at a central plane into at least two separate sections before being formed into the load-bearing section, so that at least two cabinet rails can be obtained from one width of the flat sheet metal. According to one embodiment, the reduced material thickness of the end section and the reduced material thickness of the strip-shaped section can be identical. However, identical material thickness of the strip-shaped section and the end section is not strictly necessary. Nevertheless, this method makes the production of these sections particularly simple because no additional adjustments or height settings of the rolling device are required.
[0021] According to one exemplary embodiment, the material thickness of the strip-shaped section and / or the material thickness of the end section is reduced by between 10% and 60% compared to the material thickness of the supporting section.
[0022] According to one embodiment, the material thickness of the supporting section can be between 1.5 mm and 2.0 mm and can preferably be 1.8 mm. The material thickness of the strip-shaped section and / or the material thickness of the end section can be between 1.0 mm and 1.5 mm and can preferably be 1.2 mm.
[0023] According to one embodiment, fastening means, for example at least one hole or several holes, are arranged in the strip-shaped section for fastening the cabinet rail to the furniture body.
[0024] The fastening means can also include at least one dowel or at least one locking device by which the body rail can be locked to at least one locking part that can be pre-mounted on the furniture body, preferably detachably.
[0025] At least one hole can be countersunk, so that the screw head is flush with the mounting surface or can be countersunk into it. This ensures a smooth surface without any protruding parts. In this way, a flat surface can be created between the screw head and the mounting surface, without protruding screw heads posing an obstacle or a risk of injury.
[0026] According to a further embodiment, at least two rows of holes spaced apart vertically are arranged in the strip-shaped section. Preferably, the strip-shaped section between the at least two rows of holes has a reduced material thickness compared to the supporting section. In this way, the fastening section can be designed without steps, and sheet metal material can also be saved.
[0027] According to a further embodiment, the support section and the end section each have a contact surface for resting against the furniture body, wherein the contact surface of the support section and the contact surface of the end section are arranged in a common plane. This enables convenient and tilt-free mounting of the cabinet rail to the furniture body.
[0028] The furniture according to the invention comprises a furniture body, at least one drawer movable relative to the furniture body and at least one drawer pull-out guide of the type in question.
[0029] Further details and advantages of the present invention will become apparent from the following description of the figures.
[0030] Figures 1a and 1b show a perspective view of a piece of furniture with movable drawers and a perspective view of a
[0031] Drawer pull-out guide, Figs. 2a, 2b show the cabinet rail of the
[0032] Drawer pull-out guide in a perspective view and in a cross-sectional view,
[0033] Figures 3a and 3b show cross-sectional views of a cabinet rail in two different embodiments.
[0034] Figures 4a-4d schematically show the production of a cabinet rail in chronological sequences.
[0035] Fig. 1a shows a perspective view of a piece of furniture 1 with a furniture body 2 and drawers 3 movable relative to the furniture body 2. The drawers 3 have two opposing drawer side walls 4a, 4b, a drawer front panel 6, a drawer back panel 7 and a drawer bottom 8.
[0036] To increase the storage volume of drawer 3, railing struts 5a, 5b can be provided, each of which is arranged at a predetermined distance above the drawer side walls 4a, 4b .
[0037] The drawer side walls 4a, 4b can be designed as hollow chamber profiles, preferably made of metal, which can each be detachably coupled to a pull-out guide rail 12 of a drawer pull-out guide 9 (Fig. 1b). Of course, the drawer side walls 4a, 4b can also be made of wood.
[0038] Fig. 1b shows a perspective view of a drawer slide 9 for the movable mounting of a drawer 3 relative to the furniture carcass 2. The drawer slide 9 comprises a carcass rail 10 for attachment to the furniture carcass 2 and at least one guide rail 12, which is mounted to be movable relative to the carcass rail 10 in the longitudinal direction L. The drawer side panel 4a, 4b is designed to be connected to the movable guide rail 12 of the drawer slide 9.
[0039] At the rear end of the movable guide rail 11 a hook element 13 is arranged, which in a mounted state of the drawer 3 engages in a recess of the drawer 3 and thus stabilizes the rear end area of the drawer 3 in a direction perpendicular to the longitudinal direction L.
[0040] To increase the extension range of the drawer slide 9, a third guide rail can be provided, which is movably mounted between the cabinet rail 10 and the guide rail 12.
[0041] The cabinet rail 10 has a support section 11 for supporting the at least one guide rail 12 and at least one fastening section 14 for fastening the at least one cabinet rail 10 to the furniture cabinet 2.
[0042] The at least one fastening section 14 has at least one strip-shaped section 15 with a material thickness XI reduced compared to the material thickness X (Fig. 2b) of the support section 11 and at least one end section 16 for abutting the furniture body 2. The at least one end section 16 runs substantially parallel to the strip-shaped section 15.
[0043] In the strip-shaped section 15, fastening means 17, preferably at least one hole 17a or several holes 17a, can be arranged for the passage of screws through which the body rail 10 can be fastened to the furniture body 2.
[0044] Fig. 2a shows the body rail 10 of the drawer slide 9 in a perspective view. The support section 11 for
[0045] The support of the at least one guide rail 12 can have at least one walkway 20, wherein at least one rolling element arranged between the body rail 10 and the guide rail 12 is movable along the at least one walkway 20.
[0046] Preferably, several rolling elements are arranged between the body rail 10 and the guide rail 12, which are jointly mounted in a carriage which is movable along the at least one walkway 20.
[0047] To limit the travel path of the carriage, the support section 11 can have at least one stop 18, which is designed as an integral part of the body rail 10.
[0048] The support section 11 for supporting the guide rail 12 can have a C-shaped section on which at least one walkway 20 is arranged.
[0049] The support section 11 can have at least two stiffening beads 19, which are spaced apart from each other along the longitudinal direction L of the body rail 10 and / or wherein the longitudinal directions of the at least two stiffening beads 19 each run transversely to the longitudinal direction L of the body rail 10.
[0050] Fig. 2b shows the cabinet rail 10 according to Fig. 2a in a cross-sectional view.
[0051] In the illustrated embodiment, the support section 11 has in a cross-section two spaced-apart vertical webs 21a, 21b and a horizontal web 22 connecting the two vertical webs 21a, 21b.
[0052] The support section 11 has a material thickness X, wherein the at least one fastening section 14 comprises at least one strip-shaped section 15 with a reduced material thickness XI compared to the material thickness X of the support section 11 and at least one end section 16 for abutting the furniture body 2. The at least one end section 16 runs substantially parallel to the strip-shaped section 15.
[0053] According to the invention, it is provided that the at least one end section 16 has a material thickness X2 that is reduced compared to the material thickness X of the support section 11.
[0054] Preferably, the reduced material thickness X2 of the end section 16 and the reduced material thickness XI of the strip-shaped section 15 are identical. In this way, a very simple manufacturing of the fastening section 14 with reduced material consumption is possible.
[0055] The load-bearing section 11 is connected to the strip-shaped section 15 via a first bend 23a and the strip-shaped section 15 is connected to the end section 16 via a second bend 23b.
[0056] According to one possible embodiment, the second bend 23b can be arranged as a fold 26 (Fig. 3b) or parallel to the strip-shaped section 15.
[0057] The first bend 23a and the second bend 23b can run in different directions.
[0058] The support section 11 has a contact surface 24a for contact with the furniture body 2, while the end section 16 is provided with a contact surface 24b for contact with the furniture body 2.
[0059] Preferably, the contact surface 24a of the support section 11 and the contact surface 24b of the end section 16 are arranged in a common plane. This results in a tilt-proof and stable arrangement of the cabinet rail 10 on a furniture cabinet 2 with a vertical orientation of the strip-shaped section 15 in the mounting position.
[0060] Fig. 3a shows a cross-sectional view of a cabinet rail 10 of a drawer slide 9. In the strip-shaped section 15 of the fastening section 14, two fastening means 17 spaced apart vertically from each other are arranged in the form of holes 17a, for example in the form of rows of holes.
[0061] It can be seen that the strip-shaped section 15 in a region 25 between the at least two holes 17a has a reduced material thickness XI compared to the material thickness X of the supporting section 11.
[0062] According to a further embodiment, the at least one hole 17a is designed as a countersunk hole, wherein the countersunk hole is recessed relative to a contact surface 24a of the support section 11 to be applied to the furniture body 2 and / or relative to a contact surface 24b of the end section 16 to be applied to the furniture body 2, preferably by about 0.3 mm. This has the advantage that any sharp-edged burrs of the countersunk hole cannot rub against the furniture body 2 and thus cannot cause damage to objects or injury to persons.
[0063] The support section 11 for supporting the guide rail 12 can have at least one tread 20 for rolling a rolling element and / or at least one stop 18 for limiting a travel path of a carriage that can be stored between the body rail 10 and the guide rail 12 and / or at least one stiffening rib 19.
[0064] Fig. 3b shows a cabinet rail 10 of a drawer pull-out guide.
[0065] 9 in a further embodiment. It can be seen that the strip-shaped section 15 is connected to the end section 16 via the first bend 23a with the supporting section 11 and that the end section 16 has a fold 26 for attachment to the furniture body 2.
[0066] The envelope 26 thus has a total material thickness that corresponds to twice the reduced material thickness X2 of the end section 16. In this way, the end section 16 can be provided with an increased section modulus and a stable contact surface 24b of the end section 16 on the furniture body 2 can be ensured.
[0067] It can be seen that the contact surface 24b of the cover 26, which is to be placed on the furniture body 2, and the contact surface 24a of the support section 11, which is to be placed on the furniture body 2, are arranged in a common plane. In this way, a tilt-proof arrangement of the body rail 10 on the furniture body 2 is again achieved, with a vertical orientation of the strip-shaped section 15 in the mounting position.
[0068] Figs. 4a-4d schematically show the production of a cabinet rail 10 in chronological sequences.
[0069] Fig. 4a shows a perspective view of a flat sheet 27, from which two cabinet rails 10 can be manufactured.
[0070] The cabinet rails 10 each comprise a support section 11 for supporting a guide rail 12 which is movable relative to the cabinet rail 10 and at least one fastening section 14 for fastening the cabinet rail 10 to the furniture cabinet 2 .
[0071] The fastening section 14 has at least one strip-shaped section 15 with a [missing information] opposite a
[0072] Material thickness X of the supporting section 11 reduced material thickness XI and at least one end section 16 for attachment to the furniture body 2.
[0073] Fig. 4b shows the flat sheet 27 according to Fig. 4a in a cross-section, wherein the flat sheet 27 has a material thickness X.
[0074] Fig. 4c shows that the flat sheet 27 is processed in the area of its two longitudinal edges by means of a rolling device 28 with rollers 28a, 28b such that the flat sheet 27 has a reduced material thickness XI at its two outer ends compared to the material thickness X.
[0075] The flat sheet 27 thus receives a supporting section 11 with a material thickness X and an area adjacent to the supporting section 11 with a reduced material thickness XI, from which the fastening section 14 with the strip-shaped section 15 and the end section 16 are formed.
[0076] On the opposite longitudinal edge of the flat sheet 27, a further support section 11a with a material thickness X and an area adjacent to the further support section 11a with a reduced material thickness XI are produced symmetrically to the central plane ME, from which a further fastening section 14a with a further strip-shaped section 15a and a further end section 16a are formed.
[0077] In a subsequent step, the flat sheet 27 is divided at the central plane ME into at least two separate subsections before being formed into the support section 11, 11a, so that at least two cabinet rails 10 can be formed from one width of the flat sheet 27. The symmetrical structure of the flat sheet 27 with the two fastening sections 14, 14a with reduced
[0078] Material thickness XI, X2. The rolling device 28 with the two rollers 28a, 28b also loads the flat sheet 27 symmetrically, thereby reducing the risk of undesirable curvature of the body rail 10.
[0079] Fig. 4d shows that in the strip-shaped section 15 at least one hole 17a, preferably several holes 17a and / or rows of holes, are provided for the passage of a screw.
[0080] Starting from Fig. 4c, the flat sheet 27 is formed into a cabinet rail 10, wherein the support section 11 receives two vertical webs 21a, 21b connected to each other by a horizontal web 22, and wherein the strip-shaped section 15 is bent relative to the support section 11 via a first bend 23a. The end section 16 is bent relative to the strip-shaped section 15 via a second bend 23b.
[0081] The method for manufacturing a cabinet rail 10 of a drawer slide guide 9 is characterized by the following process steps, preferably in the specified chronological order:
[0082] - a flat sheet metal 27 with a material thickness X is provided ,
[0083] - at least one strip-shaped section 15 with a material thickness XI reduced compared to the material thickness X of the sheet 27 is formed in the flat sheet 27 ,
[0084] - in the flat sheet 27 adjacent to at least one strip-shaped section 15, an end section 16 with a material thickness XI reduced compared to the material thickness X of the sheet 27 is formed, wherein the end section 16 runs essentially parallel to the strip-shaped section 15 ,
[0085] - the flat sheet metal 27 becomes, at least in some areas, a
[0086] Support section 11 is reshaped to support at least one guide rail.
[0087] According to a preferred embodiment of the method, the strip-shaped section 15 and the end section 16 are formed at a first edge of the flat sheet 27. At a second edge of the flat sheet 27, preferably mirror-symmetrical to a central plane ME of the flat sheet 27, at least one further strip-shaped section 15a with a material thickness XI reduced compared to the material thickness X of the sheet 27 and at least one further end section 16a with a material thickness X2 reduced compared to the material thickness X of the sheet 27 are formed, preferably wherein the flat sheet 27 is divided into at least two separate subsections at a central plane ME before being formed into the supporting section 11, 11a.
[0088] In a further step, the end section 16, 16a is bent relative to the strip-shaped section 15, 15a.
Claims
Patent claims 1. Drawer extension guide (9) for moving a drawer (3) relative to a furniture body (2) , comprising: - at least one cabinet rail (10) , - at least one guide rail (12) that is movable relative to the body rail (10) , - wherein the at least one cabinet rail (10) has a support section (11) for supporting the at least one guide rail (12) and at least one fastening section (14) for fastening the at least one cabinet rail (10) to the furniture cabinet (2), - wherein the at least one fastening section (14) has at least one strip-shaped section (15) with a material thickness (XI) reduced compared to the material thickness (X) of the support section (11) and at least one end section (16) for contact with the furniture body (2), wherein the at least one end section (16) runs substantially parallel to the strip-shaped section (15), characterized in that the at least one end section (16) has a material thickness (X2) reduced compared to the material thickness (X) of the support section (11).
2. Drawer extension guide (9) according to claim 1, wherein the reduced material thickness (X2) of the end section (16) and the reduced material thickness (XI) of the strip-shaped section (15) are identical.
3. Drawer extension guide (9) according to claim 1 or 2, wherein the support section (11) is connected via a first bend (23a) to the strip-shaped section (15) and the strip-shaped Section (15) via a second bend (23b) with the End section (16) is connected.
4. Drawer extension guide (9) according to one of claims 1 to 3, wherein the second bend (23b) is arranged as a fold (26) or parallel offset to the strip-shaped section (15) and / or wherein the first bend (23a) and the second bend (23b) run in different directions.
5. Drawer extension guide (9) according to one of claims 1 to 4, wherein fastening means (17) , preferably at least one hole (17a) or several holes (17a) , are arranged in the strip-shaped section (15) for fastening the cabinet rail (10) to the furniture cabinet (2).
6. Drawer extension guide (9) according to one of claims 1 to 5, wherein at least two rows of holes spaced apart from each other in the vertical direction are arranged in the strip-shaped section (15), preferably wherein the strip-shaped section (15) has a material thickness (XI) reduced in a region (25) between the at least two rows of holes compared to the material thickness (X) of the support section (11).
7. Drawer extension guide (9) according to one of claims 1 to 6, wherein the support section (11) has in a cross-section two spaced-apart vertical webs (21a, 21b) and a horizontal web (22) connecting the two vertical webs (21a, 21b) together.
8. Drawer extension guide (9) according to one of claims 1 to 7, wherein the support section (11) and the end section (16) each have a contact surface (24a, 24b) for contact with the furniture body (2), wherein the contact surface (24a) of the support section (11) and the installation area (24b) of the end section (16) are arranged in a common plane.
9. Drawer extension guide (9) according to one of claims 1 to 8, wherein at least one hole (17a) , preferably several holes (17a) , is or are arranged in the strip-shaped section (15) for the passage of a screw for fastening the body rail (10) to the furniture body (2).
10. Drawer extension guide (9) according to claim 9, wherein the at least one hole (17a) is designed as a countersunk bore, wherein the countersunk bore (17a) is set back relative to a contact surface (24a) of the support section (11) to be applied to the furniture body (2) and / or relative to a contact surface (24b) of the end section (16) to be applied to the furniture body (2), preferably by about 0.3 mm.
11. Furniture (1) with a furniture body (2), at least one drawer (3) movable relative to the furniture body (2) and with at least one drawer extension guide (9) according to one of claims 1 to 10, wherein the body rail (10) of the drawer extension guide (9) is attached to the furniture body (2) via the at least one fastening section (14).
12. Method for manufacturing a body rail (10) of a drawer slide guide (9), in particular according to one of claims 1 to 10, characterized by the following process steps, preferably in the specified chronological order: - a flat sheet (27) with a material thickness (X) is provided, - at least one strip-shaped section (15) is formed in the flat sheet (27) with a surface opposite to the Material thickness (X) of the sheet (27) reduced material thickness (XI) formed, - in the flat sheet (27) adjacent to at least one strip-shaped section (15) an end section (16) with a material thickness (X2) reduced compared to the material thickness (X) of the sheet (27) is formed, wherein the end section (16) runs essentially parallel to the strip-shaped section (15), - the flat sheet (27) is formed, at least in some areas, into a support section (11) for supporting at least one guide rail (12).
13. Method according to claim 12, wherein the strip-shaped section (15) and the end section (16) are formed at a first edge of the flat sheet (27) and wherein at a second edge of the flat sheet (27), preferably mirror-symmetric to a median plane (ME) of the flat sheet (27), at least one further strip-shaped section (15a) with a material thickness (XI) reduced compared to the material thickness (X) of the sheet (27) and at least one further end section (16a) with a material thickness (X2) reduced compared to the material thickness (X) of the sheet (27) are formed, preferably wherein the flat sheet (27) is separated into at least two separate subsections at a median plane (ME) before being formed into the support section (11).
14. Method according to claim 12 or 13, wherein at least one hole (17a), preferably several holes (17a) and / or rows of holes, is or are provided in the strip-shaped section (15) for the passage of a screw.
15. Method according to any one of claims 12 to 14, wherein the end section (16) is bent relative to the strip-shaped section (15).