DE102023130086A1 - drawer - Google Patents

Abstract

A drawer (1) comprises two double-walled side frames (5) and a rear wall (3) connecting the side frames (5), wherein the rear wall (3) has a laterally angled web (32) on the edge facing the double-walled side frame, wherein the angled web (32) bears at least partially against the outer wall of the inner wall (51) of the double-walled side frame (5), wherein each side frame (5) is fixed to the rear wall (3) via a locking mechanism (20) which has a spring element (21) which is fixed to a holder (22) in the side frame (5) and at least one locking pin (26) formed on the spring element (21) is movable along a curved guide on an insertion part (15) in order to lock the insertion part (15) arranged on the rear wall (3) to the spring element (21). An insertion aid (28, 30) is arranged on the holder (22) and is oriented obliquely to the insertion direction. This aid allows the insertion part (15) to be inserted into a receptacle of the side frame (5) for locking. This allows the rear panel (3) to be easily secured via the locking mechanism (20).

Description

The present invention relates to a drawer with two double-walled side frames and a rear wall connecting the side frames, wherein the rear wall has a laterally angled web on the edge pointing towards the double-walled side frame, wherein the angled web rests at least partially on the outer wall of the inner wall of the double-walled side frame, wherein each side frame is fixed to the rear wall via a locking mechanism which has a spring element which is fixed to a holder in the side frame and at least one locking pin formed on the spring element can be moved along a curved guide on an insertion part in order to lock the insertion part arranged on the rear wall to the spring element.

For attaching a drawer back panel to two side frames, the EP 2 592 965 B1 A locking mechanism in which a spring element arranged in the side frame has locking pins that can be locked onto an edge web of the rear panel. This fastening mechanism has proven itself and enables effective installation of the rear panel by snapping it into place. The rear panel is inserted into the frame, and the frame casing forms a stop for the inserted back panel. However, problems can arise during installation if the lateral edge web on the rear panel is not inserted into the side frame precisely aligned perpendicular to the insertion direction. The precision requirements are particularly high with narrow side frames.

It is therefore an object of the present invention to provide a drawer which enables an effective fastening of a rear wall to the side frames with high precision.

This object is achieved with a drawer having the features of claim 1.

In the drawer according to the invention, an insert part with a curved guide can be inserted into a side frame in an insertion direction in order to be fixed to a locking mechanism with a spring element, wherein an insertion aid is arranged on the holder and is aligned obliquely to the insertion direction. By means of this insertion aid, the insert part can be inserted into a receptacle of the side frame for locking. Thus, exact positioning of the insert part in a lateral direction can be achieved via the insertion aid, which enables reliable installation of the insert part on the holder even in confined spaces. In addition, the rear wall rests against the inner wall of the frame, so that the insertion aid keeps the gap between the inner wall and the rear wall as small as possible and prevents any gap from occurring.

The angle of inclination of the insertion aid to the insertion direction is preferably between 20° and 60°, so that in the event of an inaccurate positioning of the insertion part relative to the holder, the insertion aid can provide appropriate correction when the insertion part is moved along a sliding surface on the insertion aid at an angle to the insertion direction. The insertion aid preferably protrudes rearward from the holder so that, in the insertion direction, the insertion part can first come into contact with the insertion aid, provided the positioning is appropriate, before the insertion part then comes into contact with the locking mechanism.

The insertion part preferably has an angled tab in the front edge area. The tab serves as additional guidance during assembly and reduces play in the assembled position. Preferably, a holder with a spring element is arranged on each side frame, and each holder comprises an insertion aid aligned at an angle to the insertion direction. The two insertion aids are preferably inclined in different directions. This allows a rear wall to be centered during assembly using the two insertion aids, so that one insertion aid enables a corrective movement in one lateral direction and the opposite insertion aid enables a corrective movement in the opposite lateral direction.

For a compact design, the holder is made of a bent metal sheet, with the insertion aid being integrally formed.

For a stable attachment of the back panel, the insert can be integrally formed with a support that is secured to the back panel via a retaining section. This creates a pre-assembled unit, which is then secured to the two locking mechanisms in the side frames.

To ensure reliable fixation of the rear panel to the locking mechanism, the curved guide in the plug-in part is preferably substantially V-shaped, so that a deformation of the spring element is caused via a first leg, which is then at least partially reshaped by a movement on the second leg, resulting in reliable locking. The spring element can be made as a shaped spring, in particular an omega spring, from a wire with two locking pins, with each locking pin being movable in a guide on the plug-in part. This also results in easy centering of the plug-in part in the vertical direction.

Preferably, a guide groove for moving the at least one locking pin is formed on the holder. Preferably, two guide grooves for two locking pins are provided on the holder, which extend in particular in the vertical direction. This allows the locking pin to move vertically, but is blocked in the insertion direction. The holder essentially has its own curved guide. First, the pin is fixed horizontally. As soon as the insertion part pushes the pin downwards, the shaped spring can also be moved horizontally and then deflected vertically again.

For a stable fixation of the rear panel, the insert part on the support can be made of a bent metal sheet. The insert part is preferably connected via a U-shaped bend to a holding section to which the rear panel is attached.

For reliable assembly, at least one stop can be formed on the plug-in part to limit the insertion depth, which stop preferably rests against the holder.

For precise positioning, the holder preferably forms a receiving channel with the insertion aid, in which the plug-in part is at least partially enclosed laterally. The free ends of the locking pins can be longer than the width of the receiving channel.

Preferably, the holder has a guide groove for guiding the locking pins, wherein the locking pins are supported on a shoulder of guide grooves in a non-assembly position and are secured in such a non-assembly position or transport position against being able to accidentally enter the guide grooves.

In one embodiment, the holder is provided with an angled step in the lower area, which is supported on a lateral end wall of a plate-shaped drawer base. The holder can also be attached to the base via fasteners for stable attachment of the side frame and the rear wall to the step.

• 1 eine Explosionsdarstellung eines erfindungsgemäßen Schubkastens;
• 2A und 2B zwei Ansichten des Schubkastens der 1 bei der Montage der Rückwand;
• 3A bis 3C mehrere Ansichten eines Trägers zur Fixierung der Rückwand;
• 4A bis 4D mehrere Ansichten der Rastmechanik ohne das Einsteckteil;
• 5 eine perspektivische Ansicht der Rastmechanik;
• 6A bis 6D mehrere Ansichten der Rastmechanik bei der Montage;
• 7 eine perspektivische Ansicht eines modifizierten Trägers, und
• 8A bis 8D mehrere Ansichten der Rastmechanik des Trägers der 7 bei der Montage.

The invention will be explained in more detail below using an exemplary embodiment with reference to the accompanying drawings.

• 1 an exploded view of a drawer according to the invention;
• 2A and 2B two views of the drawer of the 1 when assembling the rear wall;
• 3A to 3C several views of a support for fixing the rear wall;
• 4A to 4D several views of the locking mechanism without the plug-in part;
• 5 a perspective view of the locking mechanism;
• 6A to 6D several views of the locking mechanism during assembly;
• 7 a perspective view of a modified carrier, and
• 8A to 8D several views of the locking mechanism of the carrier of the 7 during assembly.

A drawer 1 comprises a plate-shaped base 2, to which a rear wall 3 and a front panel 4 are mounted. The rear wall 3 and the front panel 4 are connected to each other via two side frames 5. Above each side frame 5, a rail 6 is provided, which connects the rear wall 3 and the front panel 4. The rail 6 can also be omitted, particularly if the drawer 1 has a lower overall height.

The side frame 5 is hollow and comprises an inner wall element 7 and an outer wall element 9, which surround a cavity. A fastening device 8 for the front panel 4 is provided in the cavity, adjacent to the front panel 4. A locking mechanism 20 is arranged in the rear area of the side frame 5, by means of which the rear wall 3 is fixed to the side frame 5.

Furthermore, an adjustment device for adjusting the inclination of the drawer 1 is provided on the rear wall 3. This adjustment device comprises a housing 11 and a support element 12, which is slidably arranged on the housing 11. To adjust the support element 12, a rotating part 13 is rotatably mounted on the housing 11. This rotating part can comprise an eccentric, an involute, or a worm to displace the support element 12. The adjustment device is arranged on a support 10, which is fixed to the rear of the rear wall 3 and serves to fix the rear wall 3 to the side frame 5. The support 10 is made of bent sheet steel and comprises a U-shaped bend 14 on each outer side with an insertion part 15 on the longer leg of the U-shaped bend 14.

In the 2A and 2B The drawer 1 is shown in a pre-assembled position, with the rear wall 3 positioned just before the assembled position. The outer wall element 9 has been omitted from the side frame 5.

At the rear end of the side frame 5, the locking mechanism 20 is arranged, which comprises a plate-shaped holder 22 to which a spring element element 21 is arranged. The spring element 21 is made of a bent wire and has two spring legs, each of which has a locking pin 26 for movement in a guide groove 27 as a curved guide. The two legs of the spring element 21 are movably held on bent tabs 23.

To assemble the rear panel, the support 10 with the insert part 15 is positioned on the holder 22 and then pushed into the side frame 5 so that the locking pins 26 can be locked along a curved guide on the insert part. This locking mechanism can be designed as shown in the EP 2 592 965 B1 is revealed.

In detail, the locking means consist of spring-loaded locking pins 26 arranged in pairs on the side frames 5 and running parallel to the rear wall 3, as well as of locking sections 17 which are provided in plug-in parts 15 of the rear wall 3 running parallel to the side frames 5.

The locking pins 26 are spring-loaded transversely to the longitudinal axis of the drawer 1 and pointing away from each other. The insert parts 15 are provided with guide sections 16 facing the front of the drawer 1, through which the spring-loaded locking pins 26 can be compressed against the spring action when the rear wall 3 is moved toward the front of the drawer 1 and can be transferred into the locking sections 17.

In the 3A to 3C 1 shows the support 10 in detail, which is made from a bent metal sheet. The support 10 comprises an upper bevel 18, on which an upper bend of the rear wall 3 can be supported. In the upper region, the support 10 has a U-shaped bend with a forward-projecting web 19, to which a railing 6 can be fixed. In the lower region, a plate-shaped insert part 15 is integrally formed via a U-shaped bend 14, on which a curved guide with two guide sections 16 with insertion bevels and two locking sections 17 for locking the locking pins 26 are formed. The curved guide is thus essentially V-shaped with the two angled sections 16 and 17 in order to be able to lock the locking pins 26 of the spring element 21 to the insert part 15. Laterally protruding stops 31 are integrally formed on the insert part 15 to limit the insertion depth. In the final position, these stops abut against a front side of the holder 22. The inclined shape of the locking sections 17, designed as locking notches, allows for good tolerance compensation when tightening the insert parts 15 toward the side frames 5, ensuring a play-free fit of the insert parts 15 in the fastening position in virtually every case.

In the 4A to 4D The locking mechanism 20 in the side frame 5 is shown in detail. The locking mechanism 20 comprises the holder 22, to which the spring element 21 is fixed via tabs 23, with two locking pins 26 at the end of the legs of the spring element 21 engaging in a guide groove 27. This guide groove 27 has a widening in which the locking pins 26 are located in a pre-assembled position. This widening locks the spring element 21 in the insertion direction, and to release this locking, the locking pins 26 must be moved vertically. In this case, the two locking pins 26 must be pressed together to release them from the pre-assembled position. Each locking pin 26 can then be moved along a U-shaped section of the guide groove 27, with the rear leg of the U in the insertion direction being significantly longer in the vertical direction, thus allowing the locking pin 26 to move vertically. A further section of the guide groove 27 extends from this U-shaped leg essentially in the insertion direction toward the front panel.

How 4B As is particularly clearly shown, the locking pins 26 are supported in a non-assembly position on a shoulder 33 of guide grooves 27 and are secured in such a non-assembly or transport position against being able to inadvertently enter the guide grooves 27. Only through the contact of the locking pins 26 with the guide sections 16 of the plug-in parts 15 are the locking pins 26 further pressed together and transferred into the locking sections 17.

A particularly advantageous embodiment of the invention provides that the locking pins 26 are arranged at the free ends of a shaped spring 21, wherein this shaped spring 21 has an approximately omega-shaped configuration, which 4A shows particularly clearly.

The plate-shaped holder 22 is made of a bent steel sheet and comprises in the lower region a substantially horizontal web 24 which is directed outwards and a step 25. The step 25 is connected to the inner wall element 7 in the region of a floor channel of the side frame 5.

An insertion aid 30 is integrally formed at the rear end of the holder 22. The insertion aid 30 is formed by an obliquely bent projection with a sliding surface. The insertion aid 30 protrudes at an angle between 20° and 60° to the insertion direction and ensures guidance of the plug-in part 15 when it is moved in the insertion direction. Furthermore, a hook-shaped guide 28 is formed integrally from the plate 22 in the direction of the inner wall 7 of the side frame 5 and opposite the insertion aid 30. The guide 28 thus forms a further insertion aid. This guide 28 accommodates one end face of the plug-in part 15 and forms a lateral stop for the plug-in part 15 in the direction of the inner wall 7.

At the upper end of the holder 22, a bevel 29 is formed, which serves to fasten the holder 22 at an upper end within the side frame 5, preferably on the inner wall 7.

As in particular 4D As can be seen, the free ends of the locking pins 26 protrude beyond the receiving channel 32 formed by the guide 28, so that the insertion tab 15 cannot slip laterally from the locking pins 26.

In 5 A locking position of the insert part 15 on the locking mechanism 20 is shown. The two locking pins 26 are located in the central vertical section of the guide groove 27 and can thus only be moved in the vertical direction, while movement in the longitudinal direction of the side frame 5 is blocked. This allows the rear wall 3 to be held on the side frame 5 via the insert part 15 and the integrally formed support 10.

In the 6A to 6D the assembly of the plug-in part 15 on the locking mechanism 20 with the holder 22 is shown.

In 6A The insertion part 15 is spaced apart from the holder 22 and the insertion aid 30, which protrudes obliquely from the plate-shaped holder 22. If the insertion part 15 is now moved towards the side frame 5, the insertion aid 30 can ensure lateral alignment or centering of the rear wall 3 with the two insertion parts 15, wherein the insertion aid 30 on the opposite side is preferably inclined in the opposite direction, so that the rear wall 3 is centered via the two insertion aids 30 if necessary.

In 6B The front portion of the insert part 15 has passed the insertion aid 30 and is now moved along the plate-shaped holder 22, from which the two locking pins 26 protrude toward the inside of the drawer 1. These two locking pins 26 are now inserted into the open area of the V-shaped curved guide with the sections 16 and 17. A length X of the locking pins 26 is greater than a width Y of a receiving channel 32.

In 6C the plug-in part 15 is still in front of the locking pins 26, but has passed the slope of the guide 28, so that the plug-in part 15 reaches a defined position that enables the rear wall 3 to rest without a gap on the outer wall of the inner wall of the side frame 5. The first locking pin 26 is inserted into the guide section 16 of the curved guide on the plug-in part 15, so that the two locking pins 26 of the spring element 21 are pressed together and the spring element 21 is released from the widened portion on the guide groove 27 and is moved along the guide groove 27 in the insertion direction until a vertical section of the guide groove 27 is reached.

Upon further movement of the plug-in part 15 in the insertion direction, the locking pins 26 now move from the guide section 16 to the locking section 17 on the plug-in part 15, so that the spring element 21 can spread open and the locking pins 26 can be moved away from each other along the guide groove 27. The locking pins 26 ensure a certain preload of the rear wall 3 towards the side frames 5. The rear wall 3 is now fixed to the locking mechanism 20 and cannot be pulled off against the insertion direction, since the locking pins engage through the vertical section of the guide groove 27 and the locking section 17 on the plug-in part 15. For disassembly, the legs of the spring element 21 must be moved so that the locking pins 26 can be moved along the section of the guide groove 27 in the insertion direction.

As the 6A to 6D show, the rear wall 3 is connected to the side frames 5 of the drawer 1 by locking means, wherein the connection between the rear wall 3 and the side frames 5 of the drawer 1 is only possible by a displacement in the direction of the longitudinal axis of the drawer 1.

In the illustrated embodiment, the spring element 21 is formed by a bent wire. It is also possible to use other spring elements 21 for the locking mechanism, with only one locking pin 26 optionally being used for locking. Furthermore, the spring element 21 can also be constructed in multiple parts. For tall frames, more than one insert part 15 and one locking mechanism 20 can be used. These would then be arranged one above the other.

In the statements after the 1 to 8D the shaped spring 21 is designed in such a way that the locking pins 26 are subjected to forces pointing away from each other.

The rear wall 3 can also be made up of several parts. It is important that the parts of the The rear wall 3 may have an insert part 15 in the area of the side frames 5. The middle area of the rear wall 3 may then be made of a different material, e.g., a piece of wood or glass.

In 7 A modified carrier 10 is shown, on which a U-shaped bend 14 with the plate-shaped plug-in part 15 is formed, wherein an angled tab 34 formed with respect to the plate-shaped plug-in part 15 is provided on the edge facing away from the bend 14. Otherwise, the carrier is designed with the two guide sections 16 with insertion bevels and the two locking sections 17 for locking the locking pins 26 as in the previous embodiment.

In the 8A to 8D is the assembly of the support 10 of the 7 with the plug-in part 15 on the locking mechanism 20 with the holder 22. In 8A the carrier 10 is arranged adjacent to the holder 22 with the spring element 21.

The tab 34 arranged at the front in the insertion direction is now 8B inserted into the holder 22 with the receiving channel 32, wherein the tab 34 is guided in the receiving channel 32 in the insertion direction.

In 8C The first locking pin 26 is inserted into the guide section 16 of the curved guide on the plug-in part 15. The spring element 21 is released from the widened portion on the guide groove 27 and is moved along the guide groove 27 in the insertion direction. During the further movement of the plug-in part 15 in the insertion direction, the locking pins 26 now move from the guide section 16 to the locking section 17 on the plug-in part 15, as shown in 8D is shown.

All embodiments according to the invention offer the advantage of convenient and easy assembly when connecting a rear panel to the side frames 5 of a drawer, whereby the assembly can be carried out both manually and mechanically. In the case of mechanical assembly, extremely short cycle times can be achieved, which has a positive effect on the cost-effectiveness of the overall assembly.

A modification of the constructions described above can consist in that the locking pins 26 can each be loaded by a separate spring.

List of reference symbols

1

drawer

2

Floor

3

back wall

4

Front panel

5

side frame

6

railing

7

inner wall element

8

Fastening device

9

outer wall element

10

carrier

11

Housing

12

Support element

13

Turned part

14

bend

15

Insert part

16

Guide section

17

Rest area

18

Bending

19

web

20

locking mechanism

21

spring element

22

holder

23

tab

24

web

25

Level

26

locking pin

27

guide groove

28

guide

29

Bending

30

Insertion aid

31

stop

32

Recording channel

33

Paragraph

34

tab

X

length

Y

Width of the recording channel

QUOTES CONTAINED IN THE DESCRIPTION

This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 2 592 965 B1 [0002, 0023]

Claims (16)

Drawer (1) with two double-walled side frames (5) and a rear wall (3) connecting the side frames (5), wherein the rear wall (3) has a laterally angled web (32) on the edge facing the double-walled side frame, wherein the angled web (32) rests at least partially on the outer wall of the inner wall (51) of the double-walled side frame (5), wherein each side frame (5) is fixed to the rear wall (3) via a locking mechanism (20) which has a spring element (21) which is fixed to a holder (22) in the side frame (5) and at least one locking pin (26) formed on the spring element (21) is movable along a curved guide on an insertion part (15) in order to lock the insertion part (15) arranged on the rear wall (3) to the spring element (21), characterized in that on the holder (22) a An insertion aid (28, 30) aligned in the insertion direction is arranged, by means of which the insertion part (15) can be inserted into a receptacle of the side frame (5) for locking. Drawer after Claim 1 , characterized in that the angle of inclination of the insertion aid (28, 30) to the insertion direction is between 20° and 60°. Drawer after Claim 1 or 2 , characterized in that the insertion aid (28, 30) projects rearward from the holder (22). Drawer according to one of the preceding claims, characterized in that a holder (22) with a spring element (21) is arranged on each side frame (5) and each holder (22) has an insertion aid (28, 30) aligned obliquely to the insertion direction. Drawer after Claim 4 , characterized in that the two insertion aids (28, 30) are inclined in different directions. Drawer according to one of the preceding claims, characterized in that the holder (22) is made of a bent metal sheet and the insertion aid (28, 30) is integrally formed. Drawer according to one of the preceding claims, characterized in that the insert part (15) is formed integrally with a support (10) which is fixed to the rear wall (3) via a holding section. Drawer according to one of the preceding claims, characterized in that the curved guide in the insertion part (15) is substantially V-shaped. Drawer according to one of the preceding claims, characterized in that the spring element (21) is designed as a shaped spring made of a wire with two locking pins (26), each of which can be moved in a curved guide on the plug-in part (15). Drawer according to one of the preceding claims, characterized in that a guide groove (16) for moving the at least one locking pin (26) on the spring element (21) is formed on the holder (22). Drawer according to one of the preceding claims, characterized in that at least one stop (31) for limiting the insertion depth is formed on the insertion part (15), wherein the stop (31) bears against the holder (22). Drawer according to one of the preceding claims, characterized in that the holder (22) has an angled step (25) in the lower region, which is supported on a lateral end wall of a plate-shaped base (2) of the drawer (1). Drawer according to one of the preceding claims, characterized in that the holder (22) with the insertion aid (28) forms a receiving channel (32) in which the insertion part (15) is at least partially enclosed laterally. Drawer after Claim 13 , characterized in that the free ends of the locking pins (26) have a greater length (x) than a width (y) of the receiving channel (32). Drawer according to one of the preceding claims, characterized in that the holder has a guide groove (27) for guiding the locking pins (26), wherein the locking pins (26) are supported in a non-assembled position on a shoulder (33) of guide grooves (27) and are secured in such a non-assembled position or transport position against being able to accidentally enter the guide grooves (27). Drawer according to one of the preceding claims, characterized in that the insert part (15) has an angled tab (34) in the front edge region.

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