EP0312654B1 - Safety lock - Google Patents

Description

The present invention relates to a security lock for a door, opening window or the like, comprising at least one bolt throwing, at least one deadbolt, control means making it possible to bring these bolts into an open position and a position for closing in a keeper formed in a frame and means for blocking the bolt throwing in its closed position according to the preamble of claim 1.

A security lock of this kind is known from document US-A-3,242,706. This lock has the disadvantage of being able to receive only one handle on one of its sides, otherwise the locking member would not offer additional protection.

The present invention aims to provide a lock of the aforementioned type having a very high reliability from the security point of view while being of a very simple construction which, in particular because of this, opens up a large number of very diverse applications to it. It is more particularly a lock on which can be adapted very sophisticated command and control means, for example, by using computer and remote control.

To achieve this objective, the invention proposes a lock of the aforementioned type with the characteristics set out in claim 1.

According to an advantageous embodiment of the lock according to the invention, it comprises at least two separate throwing bolts situated at a certain distance from each other and cooperating with each other by means of '' a mechanical or electrical transmission, so that they can be actuated simultaneously.

Other features are the subject of the subclaims.

Other details and particularities of the invention will emerge from the description given below, by way of of nonlimiting examples, of two particular embodiments of the invention, and in which the reference numbers refer to the appended figures.

Figure 1 shows an elevational view, partially broken, of a first embodiment of a lock according to the invention mounted in a door, the door being closed and the deadbolt and the latching bolt being engaged in their strike respective.

Figure 2 is a view similar to Figure 1 in which, however, the deadbolt is in its open position.

Figure 3 is a view similar to the preceding figures with the bolt also launching in its open position under the action of the control means of this bolt.

Figure 4 is a view similar to that of Figures 1 to 3, in which the door is brought into an open position by maneuvering the door handle.

FIG. 5 is another view similar to that of the preceding figures in which the opening of the door took place by means of the control means of the deadbolt, such as a key.

Figure 6 is an elevational view, partially broken, on the side opposite to that shown in Figures 1 to 5, with the door and the lock in the position shown in Figure 1.

FIG. 7 is a view similar to that of FIG. 6, showing the position of the door and of the lock, as shown in FIG. 4.

Figure 8 is an elevational view, partially broken, of a second embodiment of the lock according to the invention, in which, as in Figure 1, the bolts launching and standing are in their closed position.

FIG. 9 shows the lock according to this second embodiment in the same position as in FIG. 2.

FIG. 10 shows this second embodiment of the lock in the same position as that shown in FIG. 3.

FIG. 11 shows the lock according to this second embodiment in the same position as in FIG. 4.

FIG. 12 shows the lock according to this second embodiment in the same position as in FIG. 5.

In the various figures, the same reference numbers relate to identical or analogous elements.

In the context of the present invention, the term "throwing bolt" should be understood to mean a bolt which is brought, from its open position, into its closed position under the action of a spring. Such a bolt can also be called a "U-bolt".

The lock according to the invention is in particular intended for burglar-resistant doors, although it can, of course, also be applied to all doors or windows for which a certain security from the point of view of closure is required.

In this regard, according to the invention, FIGS. 1 to 7 show a first embodiment of such a lock embedded in a door leaf which, for its part, is mounted in a frame 2.

The lock 1 comprises a throwing bolt 3, a dead bolt 4, control means making it possible to bring these bolts 3 and 4 in an open position and a closed position in a keeper 5 respectively 27, formed in the frame 2, and means for locking the bolt throwing 4 in its closed position.

More particularly, according to the invention, the aforementioned control means of the throwing bolt 3 comprise a lever 6 which can be actuated, for example by a handle 20 wedged on a pivot 29 of square section engaging in a housing of corresponding section 30 d 'a ring 31 which is integral with the lever 6. The latter and this ring 31 form the lock follower which is a part swiveling around a fixed point 7 between the plaster and the lock of the lock, so that the lever 6 can rotate in a plane substantially parallel to that in which the throwing bolt 3 moves, that is to say in the plane of the door leaf itself. The follower cooperates with a return spring 39 which thus allows the handle 20, when released, to its rest position, which corresponds to that shown in FIG. 1.

By pressing the handle 20, the lever 6 returns the bolt throwing 3 from its closed position, as shown in Figure 1, to its open position, as shown in Figure 3, against of the aforementioned return spring 33 and of a spring 8 acting directly on the free end of the tail 34 of the launching bolt 3.

The above-mentioned locking means comprise, on the one hand, a locking member 9 pivoting around a second fixed point 10, between a locking position, as shown for example in FIG. 1, making it possible to lock the bolt throwing 3 under the action of a second spring 11 in its closed position, and an unlocking position, against this second spring 11, as shown for example in FIG. 3, so as to allow the bolt throwing 3 to pass from its closed position to its open position and vice versa and, on the other hand, an auxiliary throwing bolt 12 which, when the throwing bolt 3 is in its closed position in its keeper 5, occupies a retracted position, as shown in Figures 1 to 3, and keeps the locking member 9 in its locking position.

A transmission member 15 pivots around a fourth fixed point 16 which, in this embodiment, coincides with the fixed point 7, and cooperates with the locking member 9 and the lever 6.

Drive means 17, 18 are provided between the lever 6 and the transmission member 5, on the one hand, and between the latter and the locking member 9, on the other hand, making it possible to bring this member 9 in an unlocked position when bringing the latch bolt 3 into its open position, therefore acting on the handle 20, as shown in FIG. 3.

A connecting rod 19 is articulated by one of its ends on the deadbolt 4 and by its other end on the transmission member 15.

According to the invention, this connecting rod can, in addition, cooperate with the control means 26 of the deadbolt 4 and bring, by acting on the transmission member 15, the locking member 9 in its unlocked position and the latch bolt 3 in its open position. This has been illustrated in Figure 5.

More particularly, the auxiliary throwing bolt 12 cooperates with a tilting part 13 which, when the throwing bolt 3 is in its closed position in the keeper 5, occupies a retracted position while maintaining this part 13, against a third spring 14, in a sufficiently free position relative to the locking member 9 so that the latter can, under the effect of the second spring 11, be maintained in its locking position. The auxiliary launching bolt 12 is automatically held in its retracted position when the door is closed by the fact that the frame 2 does not have a strike facing this auxiliary bolt. Thus, when the door is closed, the auxiliary bolt 12 is automatically forced into its retracted position by tilting the part 13 around a rod 36 fixed to the base plate 32 or poncet of the lock.

The aforementioned connecting rod 19 is articulated by one of its ends on a stud 21 fixed on the transmission part 15, the other end being guided on a lug 22 fixed to the tail 50 of the deadbolt 4 and extending through a slot guide 23 formed in the connecting rod 19, substantially in the longitudinal direction of the latter.

The lock according to this first embodiment constitutes the main lock of a multiple bolt lock. Such a multiple bolt lock comprises the bolts throwing 3 and standing 4 of this main lock and, in general, a high bolt located in the upper part of the door and a low bolt located in the lower part thereof. These top and bottom bolts, which have not been shown in the figures, are controlled by a rod 28 connected to the transmission member 9, through a buttonhole 37 formed in the base plate 32 of the lock box, as represented in FIGS. 6 and 7. The rod 28 is articulated on a pin 38 fixed on the back of the transmission member 15 and passing through said buttonhole 37.

Given that the above-mentioned auxiliary locks for the top and bottom bolts constitute locks known per se, it has not been considered useful to represent them in the figures.

Below will be given a description of the operation of the lock according to this first embodiment, in which, at the same time, certain parts of the mechanism of this lock will be described in more detail.

The lock 1, as shown in Figures 1 to 7, is a lock embedded in a housing formed in the thickness of the opening part of a door 2ʹ, in particular of a burglar-proof door, so that only the headrest 39 of the lock appears and is flush with the edge of this opening part.

When the door is completely locked, the bolts throwing 3 and dormant 4 protrude outside the headrest 39 while being engaged in their respective keepers 5 and 27. This position of the bolts is called the closed position and has been shown in FIG. 1. In this case, the aforementioned top and bottom bolts are therefore also in this closed position.

To open the door, it is first necessary to disengage the deadbolt 4 from its keeper 27. This is obtained by turning a key, not shown, in the barrel 40 of the lock, in the direction of the arrow 41 , until a projection 42 of the barrel 40, rotating with the key, raises a groove 43, sliding on two pillars 44 and 45, against a spring 46, pushing against the lower edge 49 of this throat. The spring 46 presses on a chin 47 which, in the lowered position of the groove 43, engages between slots 48, provided on the upper longitudinal edge of the tail 50 of the deadbolt 4, and thus immobilizes the latter in a well-determined position.

As soon as the groove 43 is raised and the key is continued to rotate and therefore the projection 42 in the direction of the arrow 41, the latter successively abuts against a tooth 51, arranged at the free end of the lower edge of the tail 50 of the deadbolt 4, and against a second tooth 52 situated at a well-determined distance on this same lower edge, driving the deadbolt 4 in the direction of the arrow 53.

For this purpose, this tail has a slot 54, extending in the direction of this arrow, in which also engages the pillar 45 and the length of which determines the total stroke of the deadbolt 4 between its fully retracted position, corresponding to its open position, and its fully extended position, corresponding to its closed position.

Thus, by performing a first turn with the key, the projection 42 abuts against the first tooth 51 by moving the bolt 4 in the direction of the arrow 53 over half of its travel and, then performing a second turn, in the same sense, the projection 42 abuts against the second tooth 52, by moving the bolt 4 over the other half of its travel, that is to say into its fully retracted position.

The connecting rod 19 is driven by the lug 22 and simply undergoes an angular displacement around the pin 21, in the direction of the arrow 53, without the transmission member 9, on which it is articulated, moving. As soon as the projection 42 departs from the lower edge 43ʹ of the groove 43, the latter returns to its lowered position under the action of the spring 46. The position of the various parts of the lock mechanism, when the deadbolt 4 is in its open position has been clearly illustrated in Figure 2.

The following operation to open the door consists in bringing the bolt throwing 3 into its open position by turning the handle 20 downwards, as shown in FIG. 3.

The follower, constituted by the ring 31 and the lever 6, which is fixed on the latter, thus undergoes, under the action of the pivot 29, a rotation movement similar to that of the handle 20, as shown by the arrow 35 The lever 6, having a lug 34 engaging in a slot 55 formed in the transmission member 15, which is freely rotatable relative to this ring 31, drives this member also according to this same rotational movement, as indicated by the arrow 56.

A roller stop 57, mounted on this transmission member 15 and constituting the drive means 17, thus pushes against the locking member 9 and rotates the latter around the pin 10 against the spring 11 by bringing this member in its unlocked position and at the same time lifting the connecting rod 19, thanks to the presence of the slot 23 in which the lug 22 can slide freely.

Meanwhile, the free end of the lever 6 meets the free end 58, in the form of a hook, of the tail 34 of the bolt 3 and moves the latter, in the direction of the arrow 62, against the spring. 8 of the throwing bolt, until the latter reaches its fully open position.

By the fact that the rod 28 cooperates with the transmission member 15, if the top and bottom bolts, which it actuates, are throwing bolts, the latter are brought into their open position at the same time as the throwing bolt 3, by turning the handle 20 downwards.

It is, however, possible to conceive that the top and bottom bolts are dead bolts which, in this case, cooperate with the dead bolt 4 of the main lock by means of an appropriate linkage.

Once all the bolts are retracted, the door can be opened. This has the result that the auxiliary launching bolt 12 comes out of the headrest 39 under the action of the spring 14, which pushes the tilting part 13 against this bolt 12. This part is formed by a slightly curved strip which pivots by one of its ends. around the rod 36 and which has, at its other end, a stop 59 which bears against a hook-shaped part 60 of the locking member 9, against the spring 11. The spring 14, having greater force than the spring 11, keeps the locking member 9 in its unlocked position after the handle 20 has taken its initial position, as illustrated in FIG. 1. This therefore makes it possible to close the door without the need to operate the handle.

An important characteristic of the lock according to the present invention is that it is possible to bring the latch bolt 3 into its open position at the same time as the dead bolt 4 by the control means 26 of the latter, for example by turning the key in the barrel 40.

As already mentioned above, to completely open the deadbolt 4, it is necessary to act by means of the projection 42 of the barrel 40, successively on the tooth 51 and on the tooth 52, giving two turns of the key.

By performing a third turn of the key, the projection 42 bears against the lower end 49 of the connecting rod 19 and lifts it. Because this connecting rod 19 is articulated on the transmission member 15, around the pin 21 which is eccentric relative to the axis of rotation of this member, the latter will be rotated around the point of rotation 7 of the follower (6 , 31), corresponding to that obtained by pressing the handle 20.

Consequently, the roller stop 57 will also push against the locking member 9 to bring it into its unlocked position.

In addition, the transmission member 15 also has a finger 61 which acts on the hook-shaped end 58 of the tail 34 of the launching bolt 3 and which makes it possible to bring the latter into its open position. This was illustrated in Figure 5.

In certain cases, it could be useful to provide means, not shown in the figures, for putting the connecting rod 19 out of service. These means could, for example, be constituted by a declutching system cooperating with a telescopic rod.

Figures 8 to 12 relate to a second embodiment of the lock according to the invention which differs essentially from the first embodiment by the shape and the arrangement of the constituent parts of the mechanism of the lock.

Thus, the locking member 9 has a finger 62, which is located below the tail of the throwing bolt 3 and which is, when the latter is brought into its locking position, such as shown in FIGS. 8 and 9, raised up to the path of movement of the throwing bolt, whereas, in the first embodiment, this finger 62 is located above the throwing bolt, so that it is lowered to bring the member 9 in its locked position.

Another difference lies in the shape and, in a way, also in the function of the connecting rod 19.

Indeed, in this second embodiment, the connecting rod 19 cooperates with the locking member 9 via a guide 24, which is formed by a lug fixed on the lower end of this member 9 and which moves in a recess 25, forming a guide path, formed in the connecting rod between the slot 23 and the point of articulation 21.

The arrangement of this recess 25 relative to this guide 24 and the shape thereof are such that they can rotate the locking member 9 around its point of rotation 10, from its locking position to its position of unlocking, by acting on the connecting rod 19 via the control means 26 of the deadbolt 4.

In fact, the guide 24 with the recess 25 replace the roller stop 57 provided on the transmission member 15 of the first embodiment.

In addition, the arrangement and the shape of the guide path 25 and of the guide 24 relative to each other are such that the connecting rod 19 can maintain the locking member 9 in its locking position when the dead bolt 4 is in its closed position.

Thus, as can be seen in FIGS. 8 to 12, the recess 25 has substantially the shape of an L, one of the branches 25a of which extends in the longitudinal direction of the connecting rod and the other branch of which 25b extends transversely thereto. A characteristic of the branch 25b is that its lower edge 25c slopes towards the branch 25a.

In FIG. 8, the guide 24 is locked in the corner formed by the two branches 25a and 25b, so that the locking member 9 is immobilized in its locking position. This results in it is not possible to bring the bolt throwing 3 from its position closing in its open position by means of the handle 20 as long as the deadbolt is in its closed position.

If, on the other hand, the deadbolt 4 is brought into its open position, as shown in FIG. 9, the connecting rod 19 is driven by this bolt 4 and undergoes pivoting around the pin 21, in the direction of the arrow 53 This has the result that the guide 24 is housed in the free end of the branch 25b of the recess 25 and that the locking member 9 can swing around the point 10 when the handle 20 is acted on, as shown in Figure 10.

The guide 24 is then brought into the free end of the branch 25b of the recess because the transmission member 15 lifts the connecting rod 19, as can be seen in FIGS. 10 and 11.

The shape of the tilting part 13 also somewhat different from that of the lock according to FIGS. 1 to 5. It also has a stop 59, the latter being able to cooperate with the edge 60 of the locking member 9 and maintain the latter in its unlocked position, when the auxiliary bolt 12 is out, and thus allow the tilting of this member 9 in its locked position, when the auxiliary bolt 12 is retracted.

It is understood that the invention is in no way limited to the two embodiments described above and shown in the appended figures and that many variants can be envisaged without departing from the scope of the present invention as defined in the claims.

Thus, other mechanical means could be provided to immobilize the locking member in its locking position when the deadbolt is in its closed position.

Furthermore, both the handle 20 and the barrel 40 could be actuated electronically, for example by means of a suitable miniature motor, which can be controlled remotely or not.

Claims (8)

1. Safety lock (1) for a door, opening window or the like, comprising at least one sprung bolt (3), at least one deadlock bolt (4), control means (20, 6, 26) serving to bring these bolts (3, 4) into an opening position and a closing position in a striking box (5, 27) made in a door frame (2) and means (9, 11, 12, 13) for blocking the sprung bolt (3) in its closing position, the means for controlling the sprung bolt (3) comprising a lever (6) capable of being actuated about a first fixed point (7) of the lock in a plane substantially parallel to that in which the sprung bolt (3) moves and serving to bring the latter from its closing position into its opening position in opposition to a first spring (8), the blocking means comprising, on the one hand, a locking member (9) pivoting about a second fixed point (10) between a locking position, serving to block the sprung bolt (3) under the action of a second spring (11) in its closing position, and an unlocking position, in opposition to this second spring (11), permitting the sprung bolt (3) to pass from its closing position to its opening position and vice versa and, on the other hand, an auxiliary sprung bolt (12), which, when the sprung bolt (3) is in its closing position in the striking box (5), occupies a retracted position and serves to maintain the locking member (9) in its locking position, a transmission member (15) pivoting about a fourth fixed point (16) and interacting with the locking member (9) and the said lever (6), driving means (17, 18) being provided between this lever and the transmission member (15) and between the latter and the locking member (9) serving to bring this member (9) into an unlocked position at the moment at which the sprung bolt (3), under the action of the same lever (6), is brought into its opening position, a link member (19) being articulated on the deadlock bolt (4), this member (19) being capable of interacting with the means (26) for controlling the deadlock bolt (4) when the latter is in its opening position, in such a manner as to be capable of bringing the locking member (9) into its unlocked position and the sprung bolt (3) into its opening position, characterised in that the link member is formed by a linking rod (19) which is articulated both on the deadlock bolt (4) and on the transmission member (15), this rod (19) being capable of interacting with the means (26) for controlling the deadlock bolt (4) when the latter is in its opening position, in such a manner as to be capable of bringing, by acting upon this transmission member (15), the sprung bolt (3) into its opening position, which rod (19) interacts with the locking member (9) via a guide (24) provided on one of these two parts (9 or 19) moving in a guiding path (25) provided on the other part (9 or 19), the disposition and the shape of the guiding path (25) and of the guide (24) with respect to one another being such that the rod (19) can block the locking member (9) in its locking position when the deadlock bolt is in its closing position and such that it is possible to cause the locking member to pivot about the second fixed point (10) from its locking position to its unlocking position by acting upon the rod (19) via the means (26) for controlling the deadlock bolt (4) when the latter is in its opening position.
2. Lock according to Claim 1, characterised in that the abovementioned first and fourth fixed points (7, 16) have a common axis of rotation, a driving member (17) being provided between the transmission member (15) and the lever (6), so as to permit this member (15) to be caused to pivot with the lever (6) while unlocking the locking member (9), when this lever (6) brings the sprung bolt (3) into its opening position.
3. Lock according to either of Claims 1 and 2, characterised in that the auxiliary sprung bolt (12) interacts with a rocking part (13) which, when the sprung bolt (3) is in its closing position in the abovementioned striking box (5), occupies a retracted position while maintaining this rocking part (13), in opposition to a third spring (14), in a position sufficiently free with respect to the locking member (9) for the latter to be capable, under the effect of the second spring (11), of being maintained in its locking position.
4. Lock according to any of Claims 1 to 3, characterised in that the abovementioned rod (19) is articulated by one of its ends on the transmission part (15) and, by its other end, on a fixed pin (22) of the deadlock bolt (4) extending through a guiding slot (23) made in this rod (19) substantially along the longitudinal direction of the latter.
5. Lock according to any of Claims 1 to 4, characterised in that means are provided for blocking the locking member (9) in its locking position when the deadlock bolt (4) is in its closing position.
6. Lock according to any of Claims 1 to 5, characterised in that the rod (19) is capable of disengagement so as to make it possible to actuate the sprung bolt (3) and deadlock bolt (4) completely independently of one another.
7. Lock according to any of Claims 1 to 6, characterised in that it comprises at least two separate sprung bolts (3) situated at some distance from one another and interacting with one another via a mechanical or electrical transmission (28), so as to be capable of being actuated simultaneously.
8. Lock according to Claim 6, characterised in that the transmission comprises a linkage (28) actuated by the transmission member (9).

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