WO1995008686A1

WO1995008686A1 - Locking device for double sliding doors

Info

Publication number: WO1995008686A1
Application number: PCT/SE1994/000838
Authority: WO
Inventors: Jan Stendal
Original assignee: Stendals Elektriska Ab
Priority date: 1993-09-20
Filing date: 1994-09-12
Publication date: 1995-03-30
Also published as: SE9303054D0; SE9303054L

Abstract

The present invention relates to a locking device for double doors and the like, comprising a bolt follower (15) applied on one of the doors, cooperating with a lock on the other door. The invention is characterized in that the lock comprises a lock case (1) having a laterally directed notch (2), and a pivotably journalled (5) cam (4) in which a notch or recess (4A) is also provided, so that the bolt follower (15) is pressed against one side of the cam notch (4A) during a closing movement and thereby rotates the cam (4) which thus, via levers and/or a link mechanism, forces a dead-bolt (11) into the lock. Opposite movement presses the bolt follower (15) against another side of the cam notch and opposite movement results.

Description

LOCKING DEVICE FOR DOUBLE SLIDING DOORS.

Technical field:

The present invention relates to a locking device for double doors and the like, comprising a bolt follower applied on one of the doors, cooperating with a lock on the other door.

Background art:

Conventional locking devices for double doors often have latch-bolts with oblique end surfaces which, upon influence from the active door, are pushed in and influence the dead-bolt to its locking position. This has often entailed friction problems, resulting in poor function.

Another problem with such known designs is to be able to keep the dimensions and space requirement of the lock within certain limits, and also to be able to ensure locking against external manipulation as long as the door is closed.

Summary of the invention:

The object of the invention is a lock that is characterized in that it comprises a lock case having a laterally directed notch (recess), and a pivotably journalled cam in which a notch or recess is also provided so that the bolt follower is arranged, upon closing of the doors, to be inserted into the notch in the lock case and also into the notch in the cam, the bolt follower thus pressing against one side of the cam notch during a closing movement and thereby rotating the cam which thus, via levers and /or a link mechanism, forces a dead-bolt into the lock, and that the opposite movement occurs upon opening of the doors by the bolt follower pressing against another side of the cam notch, the notches of the cam and the lock case at least partially overlapping each other.

Such locking devices are not previously known and need no spring force to return the dead-bolt to its initial position after opening of the active door, which was liable to cause a problem in previous designs in the form of unfavourable friction forces. In the present case the lock is forcibly controlled both at opening and closing of the bolt follower, without said drawback.

Brief description of the drawings:

The invention is exemplified in the accompanying drawings in which

Figures 1-3 show the application area and Figures 4, 5 and 6 the lock according to the invention. Figure 7 is a view A-A according to Figure 5 and, together with Figures 8 and 9, also shows the lock movements upon closing.

Preferred embodiment:

Figure 1 shows closing of the double doors A and B. Figure 2 shows how door A is restrained until door B has passed the closing position. Figure 3 shows how door B triggers a coordinator for the lock and the doors are closed in the correct order. This is thus the principle of how the lock functions.

Figure 5 shows the lock seen from the side and provided with a dead-bolt (11). (3) is an assembly wall and (4) a pivotably journalled cam. (5) is a pivot shaft for the latter and (6) is a pin applied thereon. (7) is a lever, pivotable about a shaft (8). (9) is a link attached to the lever and (10, see Figure 8) is a pin joining lever and link. (11) is the dead-bolt of the lock and (12) a pin joining link and dead-bolt. (13) is a guide cylinder for the dead-bolt (11) and at (14) the distance is shown between assembly wall and front side. See also Figure 4.

Figure 6 shows the lock, seen from above, with dead-bolt (11) and attachment holes.

Figure 7 shows the lock according to the invention in a view A-A in Figure 5. The bolt follower (15), consisting of a pin or some other influencing means, is secured to the other door and, upon closing, is inserted in the notch (2) and in the cam notch (4 A), laterally influencing the cam (4) which is pivotably journalled at (5) on the opposite side of the lock case, into locked position. A pin (6) arranged at one end of the cam, runs in a closed slot in a lever (7) journalled at (8) on the same side of the lock case (5) as the cam (4). At (10) the lever (7) is connected to a link (9) which at (12) is connected to the dead-bolt (11). The lever-link arrangement (7-9) may be replaced with other transmissions means such as a sprocket.

Figure 8 shows the dead-bolt half way to its locking position, and Figure 9 shows it in fully locked position. The dead-bolt is guided by a guide cylinder (13). The cam is thus forcibly controlled by the bolt follower (15) in the other door and upon opening, the movement occurs in opposite direction (Fig. 9-8-7) by forced control of the cam (4) by the bolt follower (15) towards a surface (4 B) in the cam notch (4 A). The notches (2, 4 A) in the lock case and in the cam (4) overlap each other at least partially. (See Figure 4 and Figures 7-9.)

The slot (15 A) in the lever (7) is inclined and shaped for cooperating with the cam (4) and pin (6). It is so situated as to reinforce the movement of the dead-bolt (11) upwards or downwards.

The relatively small dimensions required for the present invention are thus clear. The invention can be varied in many ways within the scope of the following claims.

Claims

1. A locking device for double doors and the like, comprising a bolt follower (15) applied on one of the doors, cooperating with a lock on the other door, characterized in that the lock comprises a lock case

(1) having a laterally directed notch (2) or recess, and a pivotably journalled (5) cam (4) in which a notch or recess (4 A) is also provided so that the bolt follower is arranged, upon closing of the doors, to be inserted into the notch

(2) in the lock case and also into the notch (4 A) in the cam, the bolt follower (15) thus pressing against one side of the cam notch (4 A) during a closing movement and thereby rotating the cam (4) which thus, via levers and /or a link mechanism, forces a dead-bolt (11) into the lock, and that the opposite movement occurs upon opening of the doors by the bolt follower pressing against another side (4 B) of the cam notch (4 A), the notches (2, 4 A) of the lock case and of the cam at least partially overlapping each other.

2. A locking device as claimed in claim 1, characterized in that the cam (4) is journalled (5) at the opposite side of the lock case from the notch (2) of the lock case.

3. A locking device as claimed in claims 1-2, characterized in that a pin (6) is arranged at one end of the cam, beside the notch and directed towards the bolt, said pin being designed to run in a closed slot in a lever (7) connected to a link mechanism (9) for the dead-bolt (11) and pivotably journalled (8) on the same side of the lock case as the cam (4), the dead-bolt (11) being pushed out upon closing of the doors and rotation of the cam.

4. A locking device as claimed in any of the preceding claims, characterized in that the dead-bolt (11) is displaceable in a guide cylinder (13) arranged in the lock case.