FI108310B - Door lock - Google Patents

Abstract

A door lock having a casing-shaped lock housing 1 provided with a front plate 3, which lock housing incorporates a hooked bolt 4; 5, 6, displaceable between a locking and a free position by means of the key 9 or other transmission member of the lock, comprises a linearly displaceable, separate guide part 5 and at the end thereof, rotatably supported, a separate hook part 6, and is arranged to interact with a striking plate 14 in the door frame 13 such that, in its locking position, the hook part 6 of the hooked bolt 4; 5, 6 is inserted through an opening 14a in the striking plate and is turned towards an inner face 14b of the striking plate. The hooked bolt 4; 5, 6 comprises an articulated device, the hook part 6 of which is displaceable in the longitudinal direction of the front plate 3 compared with the guide part 5. To this end, the lock housing 1 contains a guide track 8; 8a, 8b for guiding the fulcrum of the hook part 6 both in the longitudinal direction of the front plate 3 and in the motional direction of the guide part 5. <IMAGE>

Description

108310

'DOOR LOCK - DÖRRLÄS

I, 5 The invention relates to a door lock with a hook saw according to the preamble of claim 1.

Finnish patent 104199 discloses one of the above-mentioned door locks, in which a separate hook part of the hitch axle is pivotally supported on the guide member 10 moving in the lock body. It is an object of the invention to further develop locking solutions for door or other swing blades with a hook axle so as to expand the possibilities of installing such locks and further improve their anti-theft properties. It is a further object of the invention that the lock be reliable and inexpensive.

15

The objects of the invention are achieved in the manner set forth in claim 1 and in the other claims. According to the invention, the hook axle comprises an articulation arrangement in which the hook portion is displaceable longitudinally of the breast plate relative to the guide portion. In addition, the lock body has a guide groove for guiding the hinge-20 pivot point both longitudinally of the breast plate and in the direction of motion of the guide member. This allows the hook member to be moved inside the counter plate so that the hook member can rotate into its locking position in a smaller space. Thus, the need for space in the direction of movement of the guide member and thus the output length of the bolt can be substantially reduced, whereby the possibilities for mounting the lock to various targets can be expanded accordingly.

In practice, the pivoting arrangement of the hook portion is preferably provided by a pivot pin which is displaceably supported in a guide groove extending mainly in the direction of the breast plate in the guide portion.

30 2 108310

The shape of the guide groove of the lock body is preferably selected such that at the initial stage of the outward displacement of the hook axle, the pivot point of the hook part is simultaneously displaced with respect to the breast plate. When the hook member has moved out of the chest plate opening, the guide groove extends mainly in the direction of movement of the guide member.

5

In order to ensure rotation of the hook member in the locking position, the lock body has a guide surface which, after the hook member has moved from the locking aperture of the counter plate, is arranged to guide the hook member to its pivot position in its locked position.

10

In order to improve the breakage properties of the lock, and especially when an entire locked door is attempted to be lifted out of its hinges by utilizing a hitch, a locking guide guide groove at a position corresponding to the locked position of the hook member is separated from the guide groove by a connecting piece. This connecting piece is preferably secured to the lock body by means of taper portions which can be broken by said pivot pin. Correspondingly, the upper surface of the hook member comprises a recess arranged in cooperation with the upper edge of the tongue opening of the breast plate to prevent the hook axle from being moved into the lock body 20 after said connecting piece has been broken by said pivot pin. As a result of these arrangements, the hacker will be completely stuck as a result of the burglary and thus effectively terminate the burglary with this technique.

In addition, to ensure the abovementioned preventive measures, the hook member is dimensioned so that, in its fully protruding locking position, it fills the head; a portion of the bolt plate opening in the longitudinal direction of the breast plate. This in itself · · - prevents the door from being removed from its hinges.

The construction of the axle can be considered simple and reliable if the guide part of the hooks is continuously located inside the lock body.

• ·.

3, 108310

The invention will now be described, by way of example, with reference to the accompanying drawing, in which Fig. 1 shows a known door lock arrangement mounted on a door, viewed from the side and the lock body open; Figures 2-9 illustrate an embodiment of a door lock according to the invention;

The known door lock shown in Fig. 1 comprises a lock body 1 provided with a breast plate 3 by means of which it is secured to a door 2 or the like. The high school size includes a hook axle 4, which comprises a linearly movable guide part 5 inside the lock body, to which the hook part 6 of the hook axle is pivotally pivoted. The lock body also comprises a guide groove 8 which controls the pin 7 and thus the movement movements of the hook axle. The locking axle 4 is moved directly by the lock key 9. In addition, the lock comprises a plurality of lock-displaceable spring-loaded baffle plates 10 having a baffle channel 11 for the locking pin 12 fixed to the hook axle guide portion 5. The operation of the lock is per se quite conventional and is evident from, for example, the aforementioned Finnish patent 104199, so it is not described further here. Figure 1 also shows a lock counter plate 14 with a tentacle 15 attached to the door frame 13 or the like. the hook portion 6 extends some distance parallel to the inner surface 14b of the counter plate.

The solution according to the invention illustrated in Figs. This is how the hooks of the hatching axle can be. , reduces the space required for turning the part and substantially shortens the exit length of the axle * 4 108310 without compromising the locking or operational reliability of the solution.

f In practice this is achieved so that in this case also the hook part 6 of the hook axle is pivotally connected to the guide part 5 by the pin 7, but the pivot pin 7 can move in the longitudinal guide groove 5a of the breast plate 3 arranged in the guide part. Further, the guide frame 8 of the lock body has two legs 8a and 8b in different directions. The first leg 8a is inclined with respect to both the direction of movement of the guide portion 5 of the hook axle and the breast plate 3. As a result, when moving-10, the hook bar 6 outwardly from the lock body is rotated slightly clockwise relative to the guide portion 5 (Fig. 3). The second leg 8b is parallel to the movement of the guide member 5, so that when the hook bar is moved further, the hook portion 6 moves through both the chest plate opening 3a and the counter plate opening 14a (not shown; Fig. 4). The hook member 6 can now be rotated by the pin 7 in its counter-clockwise locking position with respect to the guide member 5, partly due to gravity and partly due to the guide surface 17 in the lock body (Figures 5 and 6).

According to the invention, the guide groove 8 of the lock body further comprises an extension part 8c, which extends upwardly parallel to the breast plate 3 and which is normally separated from the leg 8b by a connecting piece 16 secured to the lock body via relief elements 16a. The lightening members 16a are dimensioned such that if a lifting force is applied to the lower edge of the hook member 6, for example to lift the door from its hinges, the pivot pin 7 of the hook member 6 breaks the lighter members 16a along the figures upwards. This is illustrated in Figures 7 and 8.

Movement of the door by its hinges is not possible per se because the hook portion 6 is dimensioned with respect to the locking plate opening 14a of the counter plate so that the structure does not allow sufficient length. . turn upward motion. As a result of this movement, however, the entire hooking shaft 5 108310 gets stuck due to a recess 6a in the hook part 6 which cooperates with the upper edge of the chest plate opening 3a. The oblique surface of the recess 6a wedges the hook portion 6 together via the pivot pin 7, the broken connecting piece 16 and the guide grooves 5a and 8c, thus effectively preventing further action in this regard * 5 (Fig. 9). This also prevents damage to the other internal members of the lock by means of a bolt, whereby the strength requirements placed on them can be kept correspondingly lower and thus the manufacturing cost of the lock body itself is lower.

It is to be noted that the hookset solution of the invention can be applied to 10 different lock bodies, whether moving the axle directly by the key, through a separate key-operated locking mechanism or, for example, through an electrical signal and solenoid or similar electrical or electromagnetic arrangement. In addition to the door, the lock can also be mounted on other similar lockable objects such as hatches, swing blades 15, etc. The invention is therefore not limited to the embodiment shown, but several variations are conceivable within the scope of the appended claims.

*

Claims (9)

A door lock comprising a housing-like lock body (1) provided with a chest plate (3), comprising a hitching axle (4; 5,6) movable between a locking and a 5 free position by a lock key (9) or other transmission element, comprising a linearly movable 5) and a separate hinge part (6) rotatably supported at its end and arranged to cooperate with a counter plate (14) in the door frame (13) such that, in its locking position, the hinge part (6) of the hooks (4; 5,6) from the opening (14a) of the counter plate and is rotated towards the inner surface (14b) of the counter plate, characterized in that the hook axis (4; 5,6) comprises an articulation arrangement whereby the hook part (6) is movable longitudinally in the chest plate (3). and that the lock body (1) has a guide groove (8; 8a, 8b) for controlling the pivot point of the hook part (6) both longitudinally of the breast plate (3) and in the direction of movement of the guide part (5). 15 Door lock according to Claim 1, characterized in that the pivoting arrangement of the hook part (6) is provided by a pivot pin (7) which is movably supported in a guide groove (5a) extending mainly in the longitudinal direction of the breast plate (5). 20 The door lock according to claim 1 or 2, characterized in that the shape of the guide frame guide groove (8; 8a, 8b) is selected such that at the initial stage of the ejection movement of the hook axle (4) the joint (7) of the hook part (6) 3) relationship down. 25th Door lock according to one of the preceding claims, characterized in that the shape of the guide groove (8; 8a, 8b) of the lock body is chosen such that the guide groove (8; 8a, 8b) in the direction of movement of the guide member (5). 30 • «7 108310 A door lock according to any one of the preceding claims, characterized in that the lock body has a guide surface (17) which, after the hinge part (6) has moved from the counter plate opening (14a), is arranged to guide the hinge part (6) (14) in the locked position 5a. Door lock according to one of the preceding claims, characterized in that the guide groove (8; 8a, 8b) on the side of the chest plate (3) at a position corresponding to the locked position of the hook part (6) has an upwardly extending guide groove portion 10. (8c) which is separated from the guide groove (8; 8a, 8b) by a connecting piece (16), and that said connecting piece (16) is secured to the lock body (1) by means of lightening parts (16a) which can be broken by said pivot pin (7). 6 108310 7. The door lock according to claim 6, characterized in that the upper surface of the hook part (6) comprises a recess (6a) arranged in cooperation with the upper edge of the chest plate opening (3a) to prevent the hook bolt (4) from moving into the lock body. ) is broken by said pivot pin (7). 20 Door lock according to one of the preceding claims, characterized in that, in its fully protruding locking position, the hook portion (6) fills the main portion of the counter plate opening (14a) in the longitudinal direction of the chest plate (3). 25 .. Door lock according to one of the preceding claims, characterized in that the guide part (5) of the hook axle is continuously located within the lock body (1). 8 108310