Patent Application
20240180327
The present invention relates to a drawer pull-out guide for movably supporting a drawer on a furniture carcass. The drawer pull-out guide includes a carcass rail configured to be fixed to the furniture carcass, and at least one drawer rail configured to be connected to the drawer. The at least one drawer rail is displaceably supported relative to the carcass rail in a longitudinal direction, and optionally at least one central rail is arranged between the carcass rail and the drawer rail. At least one of the rails, preferably the carcass rail, the central rail, and/or the at least one drawer rail, in a cross-section extending perpendicular to the longitudinal direction, includes at least one profile formed by at least one flat sheet metal having two longitudinal edges extending parallel to each other.
Moreover, the invention relates to a drawer sidewall with a drawer pull-out guide of the type to be described, and with a hollow-chamber profile which is connected or which is configured to be connected to the at least one drawer rail of the drawer pull-out guide.
The rails of a drawer pull-out guide are frequently produced by a flat sheet metal which is processed to a profiled rail by a subsequent bending operation and/or sheet forming operation. By virtue of the finished profiles, the loads of the drawer pull-out guide can be absorbed in a horizontal and in a vertical direction. As a result, the drawer connected to the drawer pull-out guide can be stably guided.
A general problem is the requirement for metal which is necessary for producing a drawer pull-out guide. A high material usage leads to a high weight and to increased costs in serial production. Therefore, it is desirable to employ metal as few as possible, particularly because a resource-saving use of raw materials creates both ecological and economic benefits.
EP 0 363 583 A1 discloses a drawer-pull out guide in which a central rail is displaceably supported between the carcass rail and the extension rail. The central rail, in a cross-section, includes two lateral running limbs for the rolling support of running rollers. Each of the lateral running limbs of the central rail is formed by a foldover having a doubled material thickness. A drawback is the fact that the bending operation for producing the central rail is relatively elaborate.
It is an object of the present invention to propose a drawer pull-out guide of the type mentioned in the introductory part, thereby avoiding the drawbacks as discussed above. According to the invention, the profile of the at least one rail, on at least one longitudinal edge, preferably on both longitudinal edges, includes at least one foldover having at least a doubled material thickness.
In other words, the profile of the carcass rail and/or the profile of the drawer rail and/or the profile of the central rail, on at least one longitudinal edge, preferably on both longitudinal edges, includes or include a foldover having at least a doubled material thickness. As a result, a simple bending operation of the sheet metal can be made possible on the one hand. On the other hand, the stiffness of the profile can be increased in a region of the foldover. Moreover, a rounded edge is formed by the foldover, and the rounded edge reduces the risk of injury instead of having a sharp longitudinal edge.
A particular advantage of the invention lies in the fact that thinner sheet metals than usual can be used for producing the drawer pull-out guide (thus, for example, sheet metals having a thickness of 0.7 mm instead of sheet metals having a thickness of 1.5 mm). By virtue of the at least one foldover, the stiffness of the carcass rail and/or of the drawer rail and/or of the central rail can be increased in the areas which are subjected to high stresses. The areas that are subjected to high stresses are, in particular, the running tracks of the carcass rail and/or of the drawer rail and/or of the central rail on which rolling bodies (in particular rolling bodies of the running carriage) can roll along.
Under the exemplary assumption that a thinner sheet metal with 0.7 mm is used, the areas which are subjected to high stresses thus receive a thickness of 1.4 mm due to the foldover. Due to the durable running tracks, the rolling bodies can be optimally guided along the rails. On the contrary, the remaining areas of the rails which are not subjected to large loads can be formed with a single, reduced material thickness (thus with a thickness of 0.7 mm). By these measures, the material usage, the weight and the costs for producing the drawer pull-out guide can be significantly reduced.
According to an embodiment, the drawer pull-out guide includes at least one rolling body which is displaceable at least over a region in the longitudinal direction along the at least one foldover.
Preferably, it can be provided that:
Further details and advantages of the present invention result from the following description of figures, in which:
The drawer pull-out guides 4 include a carcass rail 9 configured to be fixed to the furniture carcass 2 via a fastening portion 11. Further, at least one drawer rail 10 is provided, the at least one drawer rail 10 being configured to be connected to the drawer 3 and being displaceably supported relative to the stationary carcass rail 9.
If appropriate, the drawer pull-out guide 4 can also include a central rail which is displaceable between the carcass rail 9 and the drawer rail 10, thereby allowing the drawer 3 to be fully extended relative to the furniture carcass 2.
Each of the drawer sidewalls 7 can include 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.
The fastening portion 11 can include at least one, preferably circular, opening 12 for the passage of a screw so as to screw the fastening portion 11 to the furniture carcass 2.
Each of the fastening portion 11, the carcass rail 9 and the drawer rail 10 can have at least one reinforcement bead 13. At least one opening 12 for the passage of a screw can be arranged between two reinforcement beads 13. As a result, the resistance moment can be increased in this area.
The fastening portion 11 of the carcass rail 9 has a fastening side 19 configured to at least partially bear against the furniture carcass 2 when the carcass rail 9 is mounted to the furniture carcass 2.
The carcass rail 9 and/or the drawer rail 10 is or are bent to a profile 9a, 10a from a flat sheet metal having two longitudinal edges 14a, 14b (drawer rail 10) and 15a, 15b (carcass rail 9). The flat sheet metal has a material thickness (X).
The flat sheet metal, from which the profile 9a, 10a is formed, can have, for example, a material thickness (X) of between 0.5 mm and 1.0 mm, preferably a material thickness (X) of 0.7 mm.
The profile 9a of the carcass rail 9 and/or the profile 10a of the drawer rail 10 includes or include at least one foldover 16, 17 having at least a doubled material thickness (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 foldover 16, 17 has precisely a doubled material thickness (2X).
If appropriate, the foldover 16, 17 can also be folded three times or multiple times so as to obtain a triple or a multiple material thickness (X).
At least one foldover 16, 17 can be arranged on a longitudinal edge 15b of the carcass rail 9, and this foldover 16, 17 is configured to bear against the furniture carcass 2 when the carcass rail 9 is mounted to the furniture carcass 2.
According to an embodiment, the at least one foldover 16, 17, on the at least one longitudinal edge 14a, 14b, 15a, 15b, includes at least two sheet metal portions 24a, 24b bearing at least partially against each other.
The at least one drawer rail 10, on both longitudinal edges 14a, 14b, can have at least one foldover 16, 17 having at least a doubled material thickness (2X). The two foldovers 16, 17 are aligned transversely, preferably substantially perpendicular, to each other, and/or one of the two foldovers 16, 17 faces towards the inside and the other of the two foldovers 16, 17 faces towards the outside.
At least one foldover 16, 17, on the at least one longitudinal edge 14a, 14b, 15a, 15b and in a cross-section extending perpendicular to the longitudinal direction (L), includes at least one kink 18 extending in the longitudinal direction (L). Preferably, the at least one foldover 16, 17 is formed on the at least one longitudinal edge 15a of the carcass rail 9.
The carcass rail 9 can include at least one fastening portion 11 having a fastening side 19, the fastening side 19 being configured to at least partially bear against the furniture carcass 2 when the carcass rail 9 is mounted to the furniture carcass 2.
The at least one fastening portion 11 can have at least one, preferably circular, opening 12 for the passage of a fastener, preferably of a screw.
According to an embodiment, 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 a bulge 21, the bulge 21 projecting transversely from the second side 20.
By virtue of the bulge 21 surrounding the opening 12, the stiffness of the fastening portion 11 can be significantly increased in a region of the opening 12. This is, in particular, advantageous when sheet metals with a thinner material thickness (X) are employed.
At least one reinforcement bead 13 can have a longitudinal direction extending transversely to the longitudinal direction (L) of the carcass rail 9. At least one reinforcement bead 13 or a plurality of reinforcement beads 13 can be arranged on the vertical limb of the fastening portion 11 and/or on the transverse limb of the fastening portion 11.
Preferably, the rolling bodies 23a, 23b, 23c are supported in a common running carriage 22, the running carriage 22 being displaceably supported between the carcass rail 9 and the at least one drawer rail 10.
According to possible embodiments, at least one rolling body 23a is rotatable about a horizontal axis in the mounted position and is displaceable along the foldover 16 of the drawer rail 10.
At least one further rolling body 23b is rotatable about a horizontal axis in the mounted position and is displaceable along the foldover 17 of the carcass rail 9.
At least one further rolling body 23c is rotatable about a vertical axis in the mounted position and is displaceable along a portion of the carcass rail 9 having a doubled material thickness (2X).
The at least one opening 12, on a second side 20 spaced apart from the fastening side 19 by a material thickness (X), is surrounded by a bulge 21, the bulge 21 projecting transversely from the second side 20 of the fastening portion 11. The head of a screw for fixing the fastening portion 11 to the furniture carcass 2 is at least partially, preferably substantially entirely, received within the annular bulge 21 in a mounted condition.
The sheet metal portions 24a, 24b of the foldover 16, 17 bearing against each other are connected to each other by at least one common punch 25, 26. In this way, the foldover 16, 17 can be additionally stabilized.
According to an embodiment, two punches 25, 26 are provided, the punches 25, 26 being spaced apart from each other in the longitudinal direction (L).
According to preferred embodiments, it can be provided that
The at least one punch 25, 26 can thus perform a dual function. On the one hand, the punch 25, 26 serves for stabilizing the sheet metal portions 24a, 24b of the foldover 16, 17 bearing against each other. On the other hand, the laterally projecting punch 25, 26 is provided for limiting a travel path of the running carriage 22 in the longitudinal direction (L). By virtue of the punch 25, 26, the running carriage 22 receives a defined end position and can thus not ride beyond an end of the carcass rail 9 and/or of the at least drawer rail 10.
| Number | Date | Country | Kind |
|---|---|---|---|
| A 50610/2021 | Jul 2021 | AT | national |
The present application is a continuation of International Application PCT/AT2022/060252, filed Jul. 15, 2022. Thus, all of the subject matter of International Application PCT/AT2022/060252 is incorporated herein by reference.
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/AT22/60252 | Jul 2022 | WO |
| Child | 18417435 | US |
