DE9202751U1 - Central locking system for drawers arranged in a cabinet - Google Patents

Description

Utility model application ■ '.'« * ■ · . ,. -,,29/ February 1992 Note: Dipl.-Ing. Rupprecht Gr,a£ , ^: .."■,-5020 Frechen-Königsdorf

Central locking system for drawers arranged in a cabinet

Description

The invention relates to a central locking system for drawer pulls arranged in a cabinet according to the preamble of claim 1.

Locking systems of the type mentioned above are known. One such system has, for example, a vertical push rod with stoppers arranged at vertical intervals corresponding to the drawer spacing. Guides are provided on the side of each drawer, in whose guide grooves the stoppers engage and are blocked by them when locked. After unlocking the associated central lock and pulling out a drawer, the push rod is moved into such a position that the remaining drawers that have not been pulled out cannot be pulled out but are locked. Only after the first drawer has been pushed in can one of the other drawers be pulled out.

This well-known device requires extremely precise positioning of the stoppers on the push rod in the vertical direction and extremely precise guidance of all interacting elements of the system.

In practice, this results in very complex assembly and adjustment of these parts with comparatively expensive manual work and a relatively high susceptibility to failure of this device.

From DE-OS 40 01 547, an operating device for moving a drawer which can be pulled out and pushed in horizontally is housed in a drawer cabinet at a certain height, characterized in that a

A vertical drive device is provided which is arranged on a column-like vertical support, that a horizontal drive device is provided which is arranged on a horizontal support which is mounted vertically movably at right angles to the vertical support, and that the horizontal drive device moves the drawer by means of a driver after the vertical drive device has positioned the horizontal support at the height of the drawer so that the driver can engage the drawer.

This device is extremely complex and expensive. It also requires a relatively large amount of installation space in the cabinet and is therefore very disadvantageous.

The invention is based on the object of specifying an improved central locking system of the type characterized in the preamble of claim, which avoids the aforementioned disadvantages and in particular significantly reduces the assembly and adjustment work required for installation in a cabinet and significantly increases puncture safety.

The invention achieves the object by designing the device according to the features in the characterizing part of claim 1.

The design of the central locking system according to the invention advantageously creates a very simple, well-functioning, easy-to-assemble and adjust system, the individual parts of which can be manufactured very inexpensively. The ease of assembly is mainly due to the fact that the height of the drawers and the curve templates attached to them relative to the vertical extension of the

The rocker arm does not require any precise adjustment. Therefore, no height or installation tolerances need to be observed when inserting the drawers and the curve templates to be arranged on them.

Further expedient embodiments are provided in accordance with the subclaims.

The invention is shown in schematic drawings in a preferred embodiment, wherein further details, features and advantages of the invention emerge from the explanation of the example shown.

The figures show in detail:

Figure 1 is a perspective view of the locking system;

Figure 2 shows a top view of a curve template on a drawer back wall;

Figures 2a to 2c different engagement positions of curve templates and shift rocker;

Figure 3 shows a vertical section through a drawer cabinet with built-in locking system;

Figure 4 is a plan view of a spring-loaded end stop for limiting the movement of the shift arm.

Figure shows a central locking system according to the invention <:

with two schematically indicated drawers (10a) and (10b). !

In the area of the rear wall (1) of the cabinet interior, a

a vertical axis (x-x) between defined end positions j

(A) or (B) pivoting shift arm (2) arranged. j

At the rear of each drawer (10a,10b) there is a &igr;

over the rear wall (11a,lib) to the rear to protrude ^ j

horizontal curve guide plate (3a,3b) in form |

a template (4a,4b). This interacts with the ' shift rocker (2) engaging therein in such a way that

the lock (5) (Fig. 3) is first pivoted from the locking position (A) to the unlocking position (B)

When any drawer (10a) is pulled out, the rocker arm (2) is pivoted into the locking position (A) and remains there, locking the other drawers (10b to 10x), whereas when the drawer (10a) is pushed in, the rocker arm (2) is pivoted back into the unlocking position (B) when it passes through the template (4), allowing another drawer (10) to be pulled out. (jc^rtiA 2 Ot b<& 2.^) Figure 1 also shows that the rocker arm (2) is composed of two parallel rods (6,7) which are spaced apart and connected to form a rigid unit by spacer and stiffening elements (22).

The longer rod (6) adjacent to the rear wall (1) of the cabinet (23) is pivotally mounted in bores (8) and (9) at the top and bottom. The relatively shorter rod (7), which interacts with the curved guides (3a, 3b) as a locking rod, has a horizontally bent switching cam (11) at the upper end which interacts with a rotary latch (12) which can be actuated by the lock (5). The lower, free end (13) of the locking rod (7) interacts ^with an over-center rocker (16) between two stops (14, 15) (Fig. 4) defining an angular range (OC) within the end positions (A) and (B). This holds the switching rocker (2) in a defined position in the respective end position (A) or (B) with a comparatively low holding force.

According to Figure 4, the stops (14, 15) are formed on a molded part (17) made of sheet metal or plastic, on the one hand, and on the other hand the over-center swing arm (16) is articulated transversely to these with the spring (25).

This device makes assembly extremely easy because the molded part (17) is held in position with two fixing points on the cabinet floor (18).

of which one through a hole (24) in the molded part

(17) which is penetrated by the rod (6) mounted in the underlying hole (9) in the cabinet base (18), whereas the other fixed point is formed by a screw connection (19) between the molded part (17) and the cabinet base

(18) is formed.

The angle range (OC) between the locking position (A) and the unlocking position (B) of the rocker arm (2) is between 25 and 45°, and preferably 35°. The curve template (4) is preferably a sheet metal part (20) (Fig. 2) produced by stamping, with a recess in the form of the guide curve (21) that defines the switching path of the rocker arm (2) and essentially corresponds in its width (b) to the diameter of the rod (7). One embodiment provides that the locking rod (7) is pivoted by the angle (OC) with a radius (R) around the rod (6) designed as the axis (x-x) of the rocker arm (2) when it passes through the guide curve (21) of the template (4), whereby the radius (R) is defined by the parallel distance between the rods (6, 7) and the angle (OC) is defined by the stops (14, 15).

Figure 3 shows an installation situation of a drawer cabinet (23) with five drawers (10a to 10e). In the area of the rear walls (11a to 11e) the curved guides (3a to 3e) can be seen, through which the locking rod (7) of the switching rocker (2) passes. On the front of the cabinet (23) in the upper area there is the locking lock (5) with the rotary bolt (12) connected to it, which engages in the switching cam (11) of the locking rod (7) via the driver (26) and thus interacts with it in a gimbal-like manner.

The central locking system according to the invention is very practical, uncomplicated, functionally reliable and can be produced economically and thus ideally fulfills the task set out at the beginning.

&ogr;er

1 . Back wall _S_cabinet 25. Spring

2. Shifting arm 26. M

3· Curve guidance 27.

4 . Curve template 28.

5- Castle 29.

6. longer_rod_d_._shift_stroke_30.

7. shorter_length_of_the_shift lever ·

8. Borehole_qben 32.

9- Hole _bottom_33.

10. Drawer 34.

11. Switch cam 35-

12. Turn latch 36.

13. free _end__(yon_7^ 37.

14. Attack 38.

15. Attack 39·

16. Overtot£u^kJ;^featherwing 40.

17. molded part 41.

18. Cabinet floors__ 42.

19. Verschjcajuiiung ^3·

20. Sheet metal part 44.

21. F^rungs_k_urye 45.

22. spacing element 46.

23. Cabinet 47.

24. Bore 48.

Claims (1)

Dipl.-Ing. Rupprecht Graf
5020 Frechen-Königsdorf A ₌ N ₌ S ₌ P ₌ R ₌ Ü ₌ C ₌₌ H ₌ E 1. Central locking system for drawer pull-outs arranged in a cupboard with means provided in cooperation with a lock for selectively locking all drawers or optionally for unlocking and releasing only one of them at a time, which then activates the locking system in the pulled-out state in such a way that the remaining drawers are automatically locked, characterized in that in the area of the rear wall (l) of the cupboard interior there is a switching rocker (2) which can be pivoted about a vertical axis (xx) between defined end positions (A) or (B) and in the rear area of each drawer (10a, 10b, 10c etc.) there is a curve template (4) which projects backwards over its rear wall (11) and defines a horizontal curve guide (3), which cooperates with the switching rocker (2) engaging therein in such a way that the switching rocker (2) which has initially been pivoted with the lock (5) from the locking position (A) into the unlocking position (B) when When any drawer (e.g. 10a) is pulled out, the switch arm (2) is swung into the locking position (A) and all other drawers (10b, 10c, etc.) are thereby locked, whereas when the drawer (10a) is pushed in, the switch arm (2) is swung back into the unlocking position (B) when crossing the curve template (4) and allows any other drawer (10) to be pulled out. 2. Locking system according to claim 1, characterized in that the switching rocker (2) is formed from two parallel rods (6, 7) at a distance from one another and these are connected, preferably welded, to form a rigid unit with spacer elements (22), the longer rod (6) adjacent to the rear wall (1) of the cabinet (23) being pivotably mounted in bores (8, 9) at the top and bottom and the relatively shorter rod (7) cooperating with the curved guides (3a, 3b, 3c etc.) as a locking rod having a horizontally bent switching cam (11) at the upper end which cooperates with a rotary latch (12) which can be actuated by the lock (5), and the lower free end (13) of the locking rod (7) is provided between two stops (14, 15) defining an angular range (OC) within the end positions (A) or (B) with a Over-center spring rocker (16) which holds the shift rocker (2) in the respective position (A) or (B) with a comparatively low holding force. 4. Locking system according to one or more of claims 1 to 3, characterized in that the molded part (17) is held in position by two fixed points on the cabinet floor (18), one of which is formed by a bore (24) in the molded part (17) which extends from the 3. Closure system according to one of claims 1 or 2, ; characterized in that on the one hand the stops (14, 15) are molded onto a molded part (17) made of sheet metal or plastic and on the other hand the over-center swing arm (16) is articulated with the spring (25) transversely to these. - 3 -■■ penetrates the rod (8) mounted in the bore (9) underneath, whereas the other fixed point is formed by a screw connection (19) between the molded part (17) and the cabinet base (18). 5. Closure system according to one or more of claims 1 to 4, characterized in that the angle range (OC) is between 25° and 45° and preferably approximately 35°. 6. Locking system according to one or more of claims 1 to 5, characterized in that the curve template (4) is a sheet metal part (20) preferably produced by stamping technology with a recess in the form of the guide curve (21) defining the switching path of the switching rocker (2) and essentially corresponding in its width (b) to the diameter of the rod (7) of the switching rocker (2). 7. Locking system according to one or more of claims 1 to 6, characterized in that the locking rod (7) of the rocker arm (2) is pivoted about the rod (6) designed as the axis (x-x) of the rocker arm (2) with a radius (R) by the angular amount (OC) when passing through the guide curve (21) of the curve template (4), where on the one hand the radius (R) is defined by the parallel distance between the rods (6, 7) and the angle (OC) is defined by the stops (14, 15).