U.S. patent application number 16/923307 was filed with the patent office on 2020-10-29 for guide rail for a pull-out guide for a drawer.
The applicant listed for this patent is Julius Blum GmbH. Invention is credited to Pascal BERCHTOLD, Marc MEUSBURGER, Martin SCHNEIDER, Helmut SCHOENFELDER.
Application Number | 20200337457 16/923307 |
Document ID | / |
Family ID | 1000004955732 |
Filed Date | 2020-10-29 |
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United States Patent
Application |
20200337457 |
Kind Code |
A1 |
MEUSBURGER; Marc ; et
al. |
October 29, 2020 |
GUIDE RAIL FOR A PULL-OUT GUIDE FOR A DRAWER
Abstract
A drawer pull-out guide includes at least one guide rail. The
guide rail includes a longitudinally extending first limb and at
least one longitudinally extending second limb angled from the
first limb, the first limb and the second limb being connected to
one another along their longitudinal direction by an angled region.
The angled region includes at least one material diminution
extending along the angled region and being formed by a recess.
Inventors: |
MEUSBURGER; Marc; (Egg,
AT) ; SCHNEIDER; Martin; (Hard, AT) ;
BERCHTOLD; Pascal; (Alberschwende, AT) ;
SCHOENFELDER; Helmut; (Altach, AT) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Julius Blum GmbH |
Hoechst |
|
AT |
|
|
Family ID: |
1000004955732 |
Appl. No.: |
16/923307 |
Filed: |
July 8, 2020 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
PCT/AT2018/060289 |
Dec 7, 2018 |
|
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|
16923307 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
A47B 88/493 20170101;
A47B 2210/004 20130101 |
International
Class: |
A47B 88/493 20060101
A47B088/493 |
Foreign Application Data
Date |
Code |
Application Number |
Jan 12, 2018 |
AT |
A 50019/2018 |
Claims
1. A drawer pull-out guide comprising at least one guide rail, the
guide rail including a longitudinally extending first limb and at
least one longitudinally extending second limb angled from the
first limb, the first limb and the second limb being connected to
one another along their longitudinal direction by an angled region,
wherein the angled region includes at least one material diminution
extending along the angled region and being formed by a recess.
2. The drawer pull-out guide according to claim 1, wherein the
first limb and/or the second limb has or have a predetermined first
material thickness, wherein the material diminution of the angled
region formed by the recess has a reduced second material thickness
in relation to the first material thickness.
3. The drawer pull-out guide according to claim 1, wherein the at
least one recess extends substantially over an entire length of the
guide rail.
4. The drawer pull-out guide according to claim 1, wherein the at
least one recess is configured as a groove.
5. The drawer pull-out guide according to claim 1, wherein the at
least one recess, in a cross-section perpendicular to a
longitudinal direction of the guide rail, includes at least one
concave portion.
6. The drawer pull-out guide according to claim 1, wherein the
first limb and the second limb are angled to one another by an
angle of approximately 90.degree. or approximately 180.degree..
7. The drawer pull-out guide according to claim 1, wherein the
first limb and the second limb, in a region outside the at least
one recess, at least partially bear against one another.
8. The drawer pull-out guide according to claim 1, wherein at least
one rolling body is configured to run along the first limb and at
least one rolling body is configured to run along the second limb
of the guide rail.
9. The drawer pull-out guide according to claim 1, wherein the
guide rail includes a plurality of angled regions having material
diminutions formed by recesses.
10. The drawer pull-out guide according to claim 1, wherein the
drawer pull-out guide includes a first guide rail configured to be
fixed to a furniture carcass, and at least one second guide rail
displaceably supported relative to the first guide rail.
11. The drawer pull-out guide according to claim 10, wherein a
plurality of rolling bodies is arranged between the first guide
rail and the second guide rail, the rolling bodies being supported
in or on a common running carriage.
12. The drawer pull-out guide according to claim 11, wherein the
rolling bodies have a vertically extending rotational axis in the
mounted position and/or a horizontally extending rotational axis in
the mounted position.
13. The drawer pull-out guide according to claim 1, wherein the at
least one guide rail includes a substantially vertically extending
portion in a mounted position of the drawer pull-out guide, the
first limb protruding transversely in a first direction from the
vertically extending portion of the guide rail, and the second limb
protruding transversely in a second direction, opposing the first
direction, from the vertically extending portion of the guide
rail.
14. The drawer pull-out guide according to claim 1, wherein the
first limb and the second limb of the at least one guide rail are
configured so as to have a different length, wherein it is
preferably provided that the second limb has a length being at
least three times as long as a length of the first limb.
15. A method for producing a guide rail of the drawer pull-out
guide according to claim 1, comprising the following steps:
providing a longitudinally extending material strand, inserting at
least one recess in the form of a material diminution in the
material strand, preferably by a roll forming operation, the at
least one recess extending in the longitudinal extension of the
material strand, deforming or bending the material strand in a
region of the recess, whereby a first limb and a second limb angled
from the first limb are formed, and the recess is arranged in an
angled region enclosed by the first limb and the second limb.
Description
BACKGROUND OF THE INVENTION
[0001] The present invention relates to a drawer pull-out guide
comprising at least one guide rail. The guide rail includes a
longitudinally extending first limb and at least one longitudinally
extending second limb angled from the first limb, and the first
limb and the second limb are connected to one another along their
longitudinal direction by an angled region.
[0002] Moreover, the invention concerns a drawer pull-out guide
comprising at least one guide rail of the type to be described, and
a method for producing a guide rail for a drawer pull-out
guide.
[0003] Such guide rails are used for drawer pull-out guides, so
that a drawer can be supported so as to be extendable relative to a
furniture carcass in a mounted position. The drawer pull-out guides
usually include a first guide rail configured to be fixed to a
furniture carcass, and at least one second guide rail configured to
be displaceable relative to the first guide rail. In order to
enable the drawer to be fully extended relative to the furniture
carcass, a displaceably supported third guide rail may be arranged.
For supporting the displaceable guide rails, rolling bodies are
provided, the rolling bodies being supported in a running carriage
or also in a plurality of displaceable running carriages. By
specially formed guide rails, the stability and the loading
capacity of the drawer pull-out guide can be improved. When using
large material thicknesses for the guide rails, the guide rails
form a round angled region, whereby an increased installation space
has to be provided.
SUMMARY OF THE INVENTION
[0004] It is an object of the invention to propose a more compact
guide rail of a drawer pull-out guide, thereby avoiding the
above-discussed drawbacks.
[0005] According to the invention, the angled region includes at
least one material diminution extending along the angled region and
formed by a recess.
[0006] In other words, in an angled region enclosed by the two
limbs of the guide rail (that is to say, on an inner side or on an
inner radius of the angled region between the two limbs), at least
one material diminution, formed by a recess, having a reduced
material thickness is provided. The two limbs are angled to one
another about a notional axis extending in a longitudinal direction
of the recess. By the material diminution formed by the recess, a
compression caused by compressive stress on the inside of the
angled region can be prevented when the guide rail is produced by a
bending or roll forming operation. As a result, the limbs can be
angled to one another to a larger extent, for example in such a way
that the two limbs adopt not only an angle of 90.degree., but also
an angle of 180.degree. relative to one another. In this way, the
angled region can be configured so as to be more sharp-edged, and
the guide rail can be produced with a more compact design.
[0007] A particular advantage of the invention lies in the fact
that by the proposed measure, the flat running surfaces of the
guide rails provided for the contact with the rolling bodies can be
enlarged. Therefore, while maintaining the size of the guide rail,
wider rolling bodies can be utilized and, as a result, the
occurring forces can be distributed over a larger area. In this
way, the stability and the loading capacity of the drawer pull-out
guide can be additionally improved.
[0008] Thereby, the first limb and/or the second limb has or have a
predetermined first material thickness, and the material diminution
formed by the recess of the angled region has a reduced second
material thickness in relation to the first material thickness. The
definition "first material thickness" relates to the thickness of
the raw material of the guide rail, without considering possible
embossments or bends of the guide rail.
[0009] The at least one recess can extend at least over a region,
preferably over substantially an entire length of the guide rail,
in the longitudinal direction of the guide rail. Thereby, the
recess is configured as a groove.
[0010] According to an embodiment, the first limb and the second
limb, in a region outside the recess, bear against one another at
least over a region. This is, in particular, the case when the two
limbs are angled relative to one another by 180.degree..
[0011] The drawer pull-out guide according to the invention is
characterized by at least one guide rail of the described type. The
drawer pull-out guide includes a first guide rail configured to be
fixed to a furniture carcass, and at least one second guide rail
displaceably supported relative to the first guide rail. At least
one rolling body is arranged between the first guide rail and the
second guide rail, and the at least one rolling body is configured
to run along the first limb or on the second limb of a guide
rail.
[0012] The method according to the invention for producing a guide
rail for a drawer pull-out guide is characterized by the following
steps: [0013] a longitudinally extending material strand is
provided, [0014] at least one recess in the form of a material
diminution is inserted in the material strand, preferably by a roll
forming operation, the at least one recess extending in the
longitudinal extension of the material strand, [0015] the material
strand is deformed or bent in the region of the recess, whereby a
first limb and a second limb angled from the first limb are formed,
and the recess is arranged in an angled region enclosed by the
first limb and by the second limb.
BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Further details and advantages of the invention will be
explained in the following description of figures, in which:
[0017] FIG. 1 is a perspective view of an item of furniture
comprising a furniture carcass and drawers displaceably supported
relative thereto,
[0018] FIG. 2a, 2b show the drawer pull-out guide in an exploded
view and in a cross-sectional view,
[0019] FIG. 3a, 3b show a comparison between a guide rail according
to the prior art and a guide rail according to the invention,
[0020] FIG. 4a, 4b show a flat material strand with inserted
recesses and the guide rail as a finished product.
DETAILED DESCRIPTION OF THE INVENTION
[0021] FIG. 1 shows an item of furniture 1 having a cupboard-shaped
furniture carcass 2, and drawers 3 are displaceably supported
relative to the furniture carcass 2 by drawer pull-out guides 4.
Each of the drawers 3 includes a front panel 5, a drawer bottom 6,
drawer sidewalls 7 and a rear wall 8. Each of the drawer pull-out
guides 4 includes a first guide rail 9 (carcass rail) configured to
be fixed to the furniture carcass 2 by fastening portions 12a, 12b,
and a third guide rail 11 (drawer rail) displaceably supported
relative to the first guide rail 9, the third guide rail 11 being
connected or being configured to be connected to the drawer
sidewall 7. Optionally, a second guide rail 10 (central rail) may
be provided, the second rail 10 being displaceably supported
between the first guide rail 9 and the third guide rail 11 so as to
allow the drawer 3 to be fully extended.
[0022] FIG. 2a shows an exploded view of the drawer pull-out guide
4 with the first guide rail 9 (carcass rail) to be fixed to the
furniture carcass 2, the third guide rail 11 (drawer rail) to be
connected to the drawer 3, and with the second guide rail 10
(central rail) displaceably supported between the first guide rail
9 and the third guide rail 11. The first guide rail 9 includes two
fastening portions 12a, 12b spaced from each other in the
longitudinal direction (L), the first guide rail 9 being configured
to be mounted to the furniture carcass 2 by the fastening portions
12a, 12b. At least one first running carriage 13 having a plurality
of rolling bodies 14, 15 is displaceably supported between the
first guide rail 9 and the second guide rail 10. The rolling bodies
14 are spaced from each other in the longitudinal direction (L),
and each of the rolling bodies 14 has a rotational axis extending
horizontally in the mounted position. On the contrary, each of the
rolling bodies 15 has a vertically extending rotational axis in the
mounted position. By a spring-assisted retraction device 16, the
third guide rail 11 can be retracted into the closed end position
at the end of the closing movement, and the spring-assisted closing
movement can be decelerated by a damping device 17, for example in
the form of a hydraulic piston-cylinder-unit.
[0023] FIG. 2b shows the drawer pull-out guide 4 in a
cross-sectional view, in which the first running carriage 13 with
the rolling bodies 14, 15 is supported between the first guide rail
9 and the second guide rail 10. At least one second running
carriage 18 having rolling bodies 14a, 15a is displaceably
supported between the second guide rail 10 and the third guide rail
11. Each of the rolling bodies 14a has a rotational axis extending
horizontally in the mounted position, whereas the rolling bodies
15a are configured to be rotated about a vertically extending
rotational axis in the mounted position.
[0024] Taking the example of the second guide rail 10, the
invention will now be explained in greater detail. The second guide
rail 10 includes a first limb 10a and at least one second limb 10b,
the first limb 10a and the second limb 10b being connected to one
another by an angled region 23. The angled region 23 includes a
material diminution formed by a recess 21 extending along the
angled region 23. Each of the first limb 10a and/or the second limb
10b can have a predetermined first material thickness, whereas the
angled region 23 enclosed by the two limbs 10a, 10b is provided
with at least one recess 21, so that the angled region 23 has a
reduced second material thickness in relation to the limbs 10a,
10b. As shown in FIG. 2b, the limbs 10a, 10b, due to the presence
of the recess 21, can be angled to one another to a larger extent,
without substantial compressive stress occurring on the inside of
the angled region 23 when the second guide rail 10 is machined. In
the shown figure, the limbs 10a, 10b are angled to one another by
180.degree.. In a region outside the recess 21, the two limbs 10a,
10b at least partially bear against one another, preferably without
the formation of a gap 19 (FIG. 3a). In this way, the
constructional height of the second guide rail 10, in particular
when a plurality of limbs 10a, 10b are arranged above one another,
can be reduced. The guide rail 10 can also include two or more
material diminutions formed by recesses 21, 21a, 21b. In the shown
embodiment, the limbs arranged adjacent to the recesses 21a, 21b
each adopt an angle of approximately 90.degree. to one another.
[0025] FIG. 3a and FIG. 3b show a direct comparison between a guide
rail 10 according to the prior art (FIG. 3a) and a guide rail 10
according to the invention (FIG. 3b). The guide rail 10 according
to the prior art depicted in FIG. 3a has a constant material
thickness M1, and the limbs 10a, 10b--due to the lacking recess
21--are spaced from each other in a height direction under the
formation of a gap 19. This also leads to an increase in the height
(H) of the guide rail 10. In FIG. 3a, the angled region 23 has
round-shaped configuration. Moreover, only running surfaces B, C
having a relatively small width are available for the rolling
bodies 14, 15, 14a, 15a.
[0026] FIG. 3b, on the contrary, shows an embodiment of the guide
rail 10 according to the invention. Due to the recesses 21, 21a,
21b, the material thickness M2 is reduced in comparison to the
material thickness M1, so that the limbs 10a, 10b can be angled to
one another to a stronger extent. This leads to the fact that the
height H1 according to FIG. 3b is smaller than the height H
according to FIG. 3a. The smaller height H1 thus leads to a
(desired) reduced constructional height of the guide rail 10.
Moreover, it is visible that the flat running surfaces B1, C1 for
the rolling bodies 14, 15, 14a, 15a, in comparison with the flat
surfaces B, C according to FIG. 3a, are significantly enlarged. In
this way, rolling bodies 14, 15, 14a, 15a with an increased nominal
width can be utilized, so that an improved support of the guide
rails 10, 11 can be provided and the forces can be distributed over
a larger area. The recesses 21, 21a, 21b, in a cross-section
perpendicular to the longitudinal direction (L), can each include
at least one concave portion 22. The sharp-edged angled regions 23
can be preferably produced by a roll forming operation. Roll
forming (also known as roll profiling or cold rolling) is a
continuous bending method in which a material strand 20 (FIG. 4a)
of metal runs into a profiling machine, and the material strand 20
is reshaped in the profiling machine by numerous subsequent bending
operations until the desired shape of cross-section is
produced.
[0027] According to an embodiment, it can be provided that the at
least one guide rail 10, in a mounted position of the drawer
pull-out guide 4, includes a substantially vertically extending
portion 24, and the first limb 10a protrudes transversely,
preferably at a right angle, in a first direction from the
vertically extending portion 24 of the guide rail 10. The second
limb 10b protrudes transversely, preferably substantially at a
right angle, from the vertically extending portion 24 in a second
direction, opposing the first direction. Moreover, it can be
provided that the first limb 10a and the second limb 10b of the at
least one guide rail 10 are configured so as to have a different
length. It can be preferably provided that the second limb 10b has
a length being at least three times as long as a length of the
first limb 10a.
[0028] Exemplary embodiments: [0029] the material thickness M1 lies
between 0.5 mm and 3 mm, preferably between 1 mm and 2 mm, [0030]
the reduced material thickness M2 lies between 0.3 mm and 2 mm,
preferably between 0.7 mm and 1.5 mm, [0031] the reduced material
thickness M2 is smaller than 0.75, preferably smaller than 0.5,
multiplied with the material thickness M1, [0032] the width of the
running surface B1 lies between 4 mm and 7 mm, preferably between 5
mm and 6 mm, [0033] the width of the running surface C1 lies
between 2 mm and 5 mm, preferably between 3 mm and 4 mm.
[0034] FIG. 4a shows a longitudinally extending material strand 20,
in which recesses 21, 21a, 21b are introduced in a first step,
preferably by roll forming. Subsequently, the material strand 20 is
deformed or bent in a region of the recesses 21, 21a, 21b, whereby
at least one first limb 10a and at least one second limb 10b are
formed, and the recesses 21, 21a, 21b are arranged in an angled
region 23 enclosed by the first limb 10a and by the second limb
10b. In a further step, the limbs 10a, 10b can be profiled in a
height direction such that the limbs 10a, 10b, in a region outside
the recesses 21, 21a, 21b, at least partially bear against one
another, until the guide rail 10 is eventually present as a
finished product. If appropriate, each angled region 23 can also
include two or more recesses 21, 21a, 21b.
[0035] The guide rail 10 can include a third limb 10c and a fourth
limb 10d which are connected to one another by a second angled
region 23a. The second angled region 23a can have a second material
diminution formed by a second recess 21b. Likewise, the guide rail
10 can have a fifth limb 10e and a sixth limb 10f which are
connected to one another by a third angled region 23b. The third
angled region 23b can have a third material diminution formed by a
third recess 21a. The limbs 10a, 10b, 10c, 10d, 10e, 10f arranged
adjacent to one another can each be angled to one another by an
angle of approximately 45.degree., 90.degree. or 180.degree..
* * * * *