Pull-out guide, and method for mounting a pull-out guide

Abstract

The invention relates to a pull-out guide (1) comprising: a stationary guide rail (2) that can be fixed to a body; a middle rail (3) that is held on the guide rail (2) such that it can be moved via first rolling elements (5); a running rail (4) that is held on the middle rail (3) such that it can be moved via second rolling elements (6); and a bearing block (10, 20) that is fixed to the middle rail (3) and has a rotatable support roller (11) for supporting the running rail (4) at least over part of the movement path of the running rail (4) on the guide rail (2), wherein the support roller (11) extends through an opening at an upper portion of the middle rail (3), wherein the middle rail (3) has, at a substantially vertical bridging element (32), a recess (14) which is open towards an end face and at which the bearing block (10, 20) is secured by a holding portion (12, 22). The invention also relates to a method for mounting a pull-out guide (1) by means of which the bearing block (10, 20) can be effectively fixed to the middle rail (3).

Description

[0001] Drawer guide and method for mounting a drawer guide

[0002] The present invention relates to a pull-out guide with a stationary guide rail that can be fixed to a body, a middle rail that is held on the guide rail so that it can move via first rolling elements, a running rail that is held on the middle rail so that it can move via second rolling elements and a bearing block that is fixed to the middle rail and has a rotatable support roller for supporting the running rail at least over part of the travel path of the running rail on the guide rail, wherein the support roller passes through an opening in an upper section of the middle rail, and a method for assembling a pull-out guide.

[0003] DE 10 2019 124 732 A1 discloses a pullout guide with a stationary guide rail, a center rail, and a running rail, which are movable relative to one another via rolling elements. To align the running rail in the retracted position, a support element with a roller is fixed to the center rail, which can roll along a groove on the running rail. This enables the running rail to be supported on the guide rail via the roller. For the vertically movable mounting of the roller, a U-shaped bearing block is inserted into an upper recess in the center rail and secured by webs. Due to the delicate webs, the bearing block can be installed with high precision, while the holding forces of the webs are low.

[0004] It is therefore an object of the present invention to provide a pull-out guide and a method for assembling a pull-out guide which enable an improved assembly of a bearing block on the center rail.

[0005] This object is achieved with a pull-out guide having the features of claim 1 and a method having the features of claim 10.

[0006] In the drawer guide according to the invention, a bearing block with a rotatable support roller for supporting the guide rail is fixed to the center rail. In the mounted position, the center rail has a recess on a substantially vertical web that is open toward one end, to which the bearing block is secured with a holding section. This allows the holding section on the bearing block to be inserted into the recess that is open toward the end. This ensures, on the one hand, a stable fixation of the bearing block and, on the other hand, simplifies assembly because the insertion of the holding section can also be carried out automatically, or at least with minimal effort.

[0007] Preferably, the holding section is secured to an edge of the recess in a clamping or locking manner. Optionally, the recess and / or the holding section can be tapered or wedge-shaped to enable clamping during insertion. For high stability of the connection in the lateral direction perpendicular to the longitudinal direction, at least one groove can be provided on the holding section, into which an edge of the recess is inserted. Preferably, grooves are provided on a top side and a bottom side of the holding section for inserting the edge of the recess, so that the holding section is also held in the recess in a rotationally secure manner.

[0008] The recess is preferably designed as a slot or oblong hole that is open towards the front of the center rail, with the slot being aligned at an incline to the longitudinal direction of the center rail. The longitudinal direction of the slot is preferably designed to rise from the front so that when the holding section is pushed in, the bearing block with the support roller is also lifted and the support roller can be arranged on or in the opening on the upper section of the center rail. This allows the support roller to be brought into its end position with a single assembly movement. In addition, the forces acting on the bearing block in the extension direction can be diverted into the center rail.

[0009] For a compact design, the support roller is arranged on one side, positioned at a distance from a vertical center plane of the center rail. The bearing block is attached to one side via the holding section and can be fixed to the center rail without support on the opposite side.

[0010] For stable fixation, the edge of the recess or slot can be provided with a profile. The profile can, for example, comprise teeth that dig into the material of the holding section when the holding section is inserted, so that it is securely fixed to the recess. Instead of the profile or in addition to it, the holding section can also comprise a spring bar that can be locked into the recess or slot. For this purpose, a locking receptacle or locking projection can be formed on the recess to lock the spring bar and prevent the holding section from moving loose. With these fixation methods, the holding forces act in the plane of the vertical bar of the center rail.

[0011] If only a spring bar and a locking receptacle are provided for fastening the bearing block, the bearing block can be reversibly attached to the center rail.

[0012] Optionally, the support roller is mounted on the bearing block so that it can move vertically. This allows the support roller to be slightly lifted upon impact with the guide rail when the drawer slide moves into the closed position, allowing the support roller to roll along a track of the guide rail and support the running rail, as also disclosed in DE 10 2019 124 732.

[0013] The pull-out guide preferably comprises a center rail, an upper section of which is aligned substantially perpendicular to the vertical web, so that the center rail comprises a plurality of webs at right angles to one another. Preferably, two substantially vertical webs are provided, on which rolling elements roll and which encompass a cavity in which a portion of the guide rail is arranged.

[0014] Due to this arrangement, the support roller rests on the guide rail at the front end when the pull-out guide is pushed in, thus supporting the running rail.

[0015] The manufacturing processes for such rails generally consist of punching, bending, or roll-forming processes. In the method according to the invention, a recess open towards one end is punched out on a web that is essentially vertical in the later assembled position on a center rail, and an opening is also punched out in an upper section of the center rail. The order of these method steps is unimportant, as is the execution of these steps during the manufacturing process of the center rail. During the assembly process, a bearing block, on which a rotatable support roller is arranged, is pushed into the recess with a holding section, and the bearing block is fixed to the recess via the holding section. This allows the support roller to be installed effectively by pushing it in. Further fastening steps using fasteners or a welding process can be unnecessary.The holding section can only be fixed by sliding it onto the center rail.

[0016] Preferably, the recess is formed inclined to a longitudinal direction of the center rail, so that when the holding section is inserted into the recess, the support roller is raised and positioned on or in the opening on the upper section of the center rail.

[0017] The invention will be explained in more detail below using several exemplary embodiments with reference to the accompanying drawings. They show:

[0018] Figures 1 A to 1 D show several views of a pull-out guide according to the invention;

[0019] Figures 2A and 2B show two detailed views of a section of the center rail before assembly of the bearing block of a first embodiment;

[0020] Figures 3A to 3E show further detailed views of a section of the center rail after assembly of the bearing block;

[0021] Figures 4A and 4B show two views of a section of the center rail before mounting a bearing block of a second embodiment;

[0022] Figures 5A to 5D show several views of the center rail of Figure 4 with the mounted bearing block;

[0023] Figures 6A to 6C show several views of the mounting of the bearing block of Figure 4 on the middle rail, and

[0024] Figures 7A to 7E show several views of the bearing block of the second embodiment for mounting on the center rail according to Fig. A pull-out guide 1 comprises a guide rail 2 that can be secured to the body of a piece of furniture or a household appliance, on which a center rail 3 is movably mounted via first rolling elements 5. A running rail 4, to which a drawer or other sliding element can be fixed, is movably held on the center rail 3 via second rolling elements 6. A hook 7 for fixing a sliding element is provided on the rear area of ​​the running rail 4. The rolling elements 5 and 6 can be cylindrical, spherical, or concave and roll on flat tracks. Alternatively, the tracks can also have a different geometry, whereby the rolling elements 5 and 6 can also be designed as barrels or balls.

[0025] On the guide rail 4, a downwardly projecting strip-shaped embossing 8 is provided at a front section in the extension direction. In the retracted position of the pull-out guide 1, this strip-shaped embossing is supported on a support roller 11 in order to support the guide rail 4 in the retracted position on the guide rail 2. The support roller 11 is rotatably mounted on a bearing block 10, which is fixed to the center rail 3. In the retracted position, the support roller 11 is supported on its underside on a track on the guide rail 2.

[0026] Figures 2A and 2B show a front end section of the center rail 3, to which the bearing block 10 is mounted. The center rail 3 comprises an upper horizontal section 30, from which two essentially vertical webs 31 and 32 extend downward. On the essentially vertical web 32, an angled portion 33 is provided in the lower region, which can optionally also be omitted. On the essentially vertical web 32, a recess 14 is formed which is open towards the end face of the center rail 3 and, as a slot, has a greater longitudinal extent than width. An edge of the recess 14 is formed with a profiling 15 in the form of teeth, although the profiling can also have a different shape. In the upper section 30 of the center rail 3, an opening 13 is recessed which is circumferentially surrounded by material of the center rail 3.

[0027] The bearing block 10 comprises a laterally arranged holding section 12 which has an upper groove 17 and a lower groove 17. A support roller 11 is rotatably mounted on the bearing block 10, wherein the support roller 11 can have protruding axes on opposite sides which are held in receptacles or slots in the bearing block 10. To assemble the bearing block 10, the holding section 12 is inserted into the recess 14, as shown by the arrow in Figure 2B. The assembly direction is aligned at an angle to the longitudinal direction of the center rail 3, for example at an angle between 10° and 40°, so that when the holding section 12 is inserted into the recess 14, the support roller 11 performs a vertical movement and can be positioned on or in the opening 13.

[0028] A stop 18 limits the maximum insertion position of the bearing block 10, in which the stop 18 can rest against an end of the recess 13 facing away from the front side of the center rail 3. In the maximum insertion position, the stop 18 ensures that the support roller 11 can continue to rotate freely.

[0029] Figures 3A to 3E show the assembled position of the bearing block 10. An edge of the recess 14 is inserted into the upper groove 17 and the lower groove 17 on the holding section 12, so that the holding section 12 is held immovably on the essentially vertical web 32 in a direction perpendicular to the longitudinal direction. Furthermore, when the holding section 12 is inserted, the profiling 15 ensures fixation, as the teeth of the profiling 15 dig into the material of the holding section 12 and secure it against withdrawal. A front end of the bearing block 10 is essentially flush with an end face of the center rail 3, so that no protruding component is provided. The support roller 11 is arranged on one side on the side of the essentially vertical web 32, i.e., offset from a vertical center plane of the center rail 3.

[0030] This allows the support roller 11 to be positioned in a compact design adjacent to the vertical web 32. The required installation space of the bearing block 10 is preferably less than 70% of the width of the center rail 3.

[0031] Figures 4A and 4B show a second embodiment in which the center rail 3 has a recess 14 on the essentially vertical web 32. This recess 14 does not have a profile with teeth, but only a locking receptacle 16, and otherwise a smooth edge around the recess 14. A modified bearing block 20, on which a support roller 11 is rotatably mounted, is mounted on the center rail 3. The bearing block 20 has a lateral holding section 22 which comprises a spring bar 23 with a locking projection 24. For assembly, the holding section 22 with the spring bar 23 is pushed into the recess 14. Figures 5A to 5D show the bearing block 20 in the assembled position. The holding section 22 is located with the spring bar 23 in the recess 14, with the locking projection 24 being inserted into the locking receptacle 16.The support roller 11 passes through the upper section 30 of the center rail, which is otherwise designed as in the previous embodiment.

[0032] Figures 6A to 6C show the individual steps of assembling the bearing block 20. In Figure 6A, the retaining section 22 is located in front of the recess 14 and is inserted into it. In Figure 6B, the locking projection 24 is arranged on the end face of the center rail 3 and is now pressed inward due to its shape, so that the spring bar 23 is bent. By further inserting the retaining section 22, the locking projection 24 reaches the area of ​​the locking receptacle 16 and can lock there, so that the retaining section 22 is secured against removal from the recess 14.

[0033] Figures 7A to 7E show the bearing block 20 in detail. The bearing block 20 comprises the holding section 22 arranged on one side with the spring bar 23. The holding section 22 has a groove 25 on an upper side into which an edge of the recess 14 can be inserted. The groove 25 surrounds the edge of the recess 14 on the upper side. To prevent rotation, the bar 29 rests against an inner side of the essentially vertical bar 32. Optionally, a further groove can also be provided on the underside of the holding section 22.

[0034] A flexible spring element 27 is integrally formed on the bearing block 20 adjacent to the support roller 11 and is arranged adjacent to a circumference of the support roller 11 on a frame around the support roller 11. The spring element 27 is preferably attached to a stop 26 on the side of the support roller 11 facing away from the end face of the center rail 3. The spring element 27 rests with a free end 28 on the outer circumference of the support roller 11 and holds it in a raised position on the bearing block 20. As a result, the support roller 11 can be held essentially at the same height as in the retracted position when this is arranged between the running rail 4 and the guide rail 2, even when the support roller 11 moves away from the guide rail 2. Optionally, this spring element 27 can also be omitted; in this case, the support roller 11 is raised when it hits the guide rail 2 during a closing movement.The bearing blocks 10 and 20 can be fixed to the center rail 3 without welding, gluing, or other fastening means. For mounting the support roller, the holding section 12 or 22 is inserted diagonally into the recess 14 so that the support roller 11 is lifted during mounting of the bearing block 10 or 20 and positioned at or in the opening 13.

[0035] List of reference symbols

[0036] 1 drawer guide

[0037] 2 guide rails

[0038] 3 middle rail

[0039] 4 guide rail

[0040] 5 rolling elements

[0041] 6 rolling elements

[0042] 7 hooks

[0043] 8 Embossing

[0044] 10 bearing block

[0045] 11 Support roller

[0046] 12 stopping section

[0047] 13 Opening

[0048] 14 Recess

[0049] 15 Profiling

[0050] 16 locking mount

[0051] 17 grooves

[0052] 18 stops

[0053] 20 bearing block

[0054] 22 stopping section

[0055] 23 spring bar

[0056] 24 locking projection

[0057] 25 grooves

[0058] 26 stop

[0059] 27 Spring element

[0060] 28 End

[0061] 29 jetty

[0062] 30 upper section

[0063] 31 vertical bridge

[0064] 32 vertical bridge

[0065] 33 Bending

[0066] 34 Axis

Claims

Claims 1. Pull-out guide (1), comprising: a) a stationary guide rail (2) which can be fixed to a body; b) a central rail (3) which is held on the guide rail (2) so as to be movable via first rolling elements (5); c) a running rail (4) which is held on the central rail (3) so as to be movable via second rolling elements (6), and d) a bearing block (10, 20) which is fixed to the central rail (3) and has a rotatable support roller (11) for supporting the running rail (4) on the guide rail (2) at least over part of the travel path of the running rail (4), the support roller (11) passing through an opening in an upper section of the central rail (3), characterized in that the central rail (3) has a recess (14) on a substantially vertical web (32) which is open towards one end and to which the bearing block (10, 20) is fixed by means of a holding section (12, 22).

2. Pull-out guide according to claim 1, characterized in that the holding section (12, 22) is clamped or latched to an edge of the recess (14).

3. Pull-out guide according to claim 1 or 2, characterized in that the holding section (12, 22) has a groove (17, 25) in which an edge is inserted at the recess (14).

4. Pull-out guide according to one of the preceding claims, characterized in that the recess (14) is slot-shaped and is aligned in the longitudinal direction inclined to a longitudinal direction of the central rail (3).

5. Pull-out guide according to one of the preceding claims, characterized in that the support roller (11) is arranged at a distance from a vertical center plane of the center rail (3).

6. Pull-out guide according to one of the preceding claims, characterized in that an edge of the recess (14) has a profiling (15).

7. Pull-out guide according to one of the preceding claims, characterized in that the holding section (22) has a spring bar (23) which is fixed to the recess (14).

8. Pull-out guide according to one of the preceding claims, characterized in that the support roller (11) is held on the bearing block (10, 20) so as to be displaceable in the vertical direction.

9. Pull-out guide according to one of the preceding claims, characterized in that the upper section (30) of the central rail (3) is aligned substantially perpendicular to the substantially vertical web (32).

10. Method for assembling a pull-out guide (1) with a stationary guide rail (2) that can be fixed to a body, a central rail (3) that is held on the guide rail (2) so that it can move via first rolling elements (5), and a running rail (4) that is held on the central rail (3) so that it can move via second rolling elements (6), with the following steps: - punching out a recess (14) open towards one end face on a web (32) of the central rail (3) which is essentially vertical in the mounted position; - punching out an opening (13) in an upper section (30) of the central rail (3), characterized by inserting a bearing block (10, 20) with a rotatable support roller (11) with a holding section (12, 22) into the recess (14) and fixing the bearing block (10, 20) via the holding section (12, 22) to the recess (14).

11. Method according to claim 10, characterized in that the insertion into the recess (14) is carried out inclined to a longitudinal direction of the central rail (3), so that the support roller (11) is moved vertically during insertion and is positioned at the opening (13) on the upper section (30).

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