FR2845718A1 - Lock for high security sliding door, comprises bolt which is spring loaded towards a locked position, an operating plate with articulated latch to engage with fixed lug and door detecting finger - Google Patents

Abstract

The lock (2) may be mounted on the door or door frame of sliding doors and has a bolt (24) which is spring loaded (34) towards a locked position. When the door is not closed the bolt may move because a detecting finger (102) trips the latch (42,44) on the operating plate (40). When the door is closed the spring loaded latch is operative and the door may only be opened by an electromagnet (78) striking a latch plate (72). An Independent claim is also included for : A door frame on a railway carriage which uses the lock

Description

The present invention relates to a lock intended to be mounted on a

  door leaf or on a door frame, of the type comprising a locking bolt adapted to cooperate with a retaining member mounted on the door frame or on the door leaf, the locking bolt being mo5 bile between a blocking position in which it retains the lock relative to the retaining member and a release position in which the lock is free

  to move relative to the retainer.

  The invention applies in particular to compartment locks of

controller on a train.

  Locks are known which serve to lock the door of a compartment of a controller in a train. Such locks are fixed to the door leaf and generally include a hook-shaped locking bolt, which is articulated between a low door locking position and a position

door release lift.

  The locking bolt is connected to a nut which can be operated by

a square key.

  When the door closes, the locking bolt engages

  in an undercut of a recess in the door frame.

  In order to open the door, the square key is inserted into a corresponding recess 20 in the follower and the bolt is raised by rotation of the key.

  These known locks no longer meet the increased need for security in trains. Indeed, in the closed state of the door, the locking bolt can easily be lifted by introducing an object, such as for example a blade,

  in the gap between the frame and the door.

  This is why the invention aims to provide a lock which allows reliable locking of a door of a compartment of a train controller. To this end, the subject of the invention is a lock of the aforementioned type, characterized in that it further comprises releasable locking means of the locking bolt in its locking position, these locking means having a locking configuration in which the locking bolt is locked away from its release position and an unlocking configuration, in which the locking bolt is free to move to its release position, in that it comprises automatic means for supplying the locking means in their locking configuration after the supply of the locking bolt in cooperation with the retaining member, and in that the lock comprises

  means for releasing the locking means.

  According to particular embodiments of the lock according to the invention, the latter comprises one or more of the following characteristics: - the locking means are urged towards their unlocking configuration when the locking bolt is out of cooperation with the retainer; the locking means comprise a locking member connected to the locking bolt and a complementary locking member, the locking means comprise an actuating member of the locking member, and this actuating member is arranged in such a way that a bias of this member, when the locking member is in its unlocking position, biases the locking bolt towards its release position; the locking means comprise a sliding sliding drawer, in particular in a rectilinear direction, this drawer being adapted to bring the locking bolt from its locking position to its release position, and the locking member is a rocker articulated on the drawer around a second axis; - The lock comprises a support, the locking bolt is articulated around a first axis with respect to the support, and the locking bolt comprises a snap-fit spout adapted to cooperate with the retaining member; - The lock comprises first and second actuation means adapted to bring the locking means into their unlocking configuration, and said first and second actuation means can be actuated independently of one another; - At least one of the two actuating means is adapted to bring, during actuation, the locking means into their unlocking configuration and then to bring the locking bolt into its release position; the first actuation means comprise a safety cylinder having a bit and can be actuated by a key, and the second actuation means comprise an electric drive device, in particular an electromagnet; - The first and second actuation means are adapted to act on the actuation member of the locking means; the automatic means for supplying the locking means to the locking configuration comprise means for detecting the position of the lock with respect to the retaining member, adapted to bring the locking means into their unlocking configuration when the the retaining member is out of cooperation with the locking bolt, and to allow the locking means to assume their locking configuration when the locking bolt cooperates with the retaining member; and the detection means comprise a finger movable relative to the

  support and adapted to rest on the door frame or on the door leaf, the finger holding the locking lever in its unlocking position when the door is open.

  The invention further relates to a door frame for a rail vehicle comprising a lock as defined above.

  The invention will be better understood on reading the description which will

  follow, given only by way of example, and made with reference to the appended drawings 20, in which: - Figure 1 is a perspective view of three quarters before a lock according to the invention, - Figure 2 is a rear quarter view of the lock of Figure 1, - Figures 3 to 6 are side views of the lock of Figures 1 and 2 in different operating phases, - Figures 3A to 6A show the details IIIA to VIA in figures 3 to 6, to

larger scale.

  FIGS. 1 and 2 show a lock according to the invention, designated by the general reference 2.

  The lock 2 is intended to be mounted on a door 4 of a vehicle

  railway, in particular of a door of a compartment of a train controller. The door consists of a frame 6, fixed to the chassis of the car and a van

  door tail 8 movable in sliding with respect to the frame 6 according to a

horizontal direction C.

  The lock 2 is mounted on the frame 6 of the door 4.

  The door leaf 8 comprises a member 10 for retaining the lock. The lock 2 comprises a support formed by a housing 12. This housing 12 comprises a side plate 14, as well as a front plate 16 and a rear plate 18, formed by a metal profile having a U-shaped cross section. Two openings 20, 22 are formed in the front plate 16. In the assembled state of the lock, the front plate 16 is directed towards the door leaf 8.

  In the assembled state of the lock, the plates 14, 16, 18 extend vertically. The side plate 14 extends substantially parallel to the door leaf 8 while the other two plates 16, 18 extend perpendicular to the door leaf 8.

  The lock 2 further comprises a blocking bolt 24, lever-shaped, articulated to the side plate 14 about a first axis XX extending perpendicularly relative to this side plate 14. The blocking bolt 24 extends through the opening 20 and ends with a latching spout 26 20 provided with a cam surface 28 and a retaining surface 30. The cam surface 28 is directed towards the door leaf 8, while the retaining surface 30 extends substantially parallel to the front plate 16. The locking bolt 24 is movable in rotation about the axis XX between a low locking position, in which the retaining surface 30 cooperates with the member 25 retaining 10 of the door leaf 8 (see Figure 4) when the door is closed, and a high release position, in which the retaining surface 30 is offset from the retaining member 10 so that the member retainer 10 can be

  move relative to lock 2 (see figure 6).

  Furthermore, the locking bolt 24 is provided with a support projection 32 30 extending on the opposite side of the latching spout 26 relative to the axis XX. A first spring 34 is supported on the support projection 32 and on a support plate 36 secured to the side plate 14. It biases the locking bolt 24 towards its

blocking position.

  The lock 2 further comprises releasable locking means 38 of the locking bolt 24 in its locking position.

  These locking means 38 comprise a drawer 40, a rocker

  42 and a locking lug 44.

  The drawer 40 is movable in rectilinear sliding in a direction D, which extends parallel to the side plate 14 and perpendicular to the axis X-X. The drawer 40 includes a first end 46, forming a connection part to the locking bolt 24, as well as a second end 48 forming a connection part to the locking lever 42. The end 46 is provided with an oblong hole 50 which extends perpendicular to direction D, and into which engages a lug 52 secured to the locking bolt 24. The locking bolt 24

  is thus articulated to the drawer 40 around an axis Y-Y.

  The locking lever 42 is articulated to the drawer 40, at the end

  48, around an axis Z-Z, extending parallel to the axis X-X.

  The locking lug 44 protrudes from the side plate 14 perpendicular thereto, and extends to the level of the locking latch 42. The locking lug 44 is located between the two ends 46, 48 of the drawer in direction D.

  The locking lever 42 comprises a first articulation end 54, a central part 56 and a second locking end 58.

  The second end 58 is stepped and forms a stop surface 60

  extending parallel to the Z-Z axis.

  This locking lever 42 is movable between a locking position, in which the stepped part 58 bears against the locking lug 25 lage 44, and an unlocking position, in which the lever 42 is aligned.

  with the drawer 40 and in which the abutment surface 60 releases the lug 44 (see FIG. 3). The unlocking position of the locking lever 42 is defined by a lug 62 secured to the rear plate 14.

  Thus, when the locking lever 42 is in its unlocking position 30, the locking bolt 24 and the slide 40 can be moved in the direction D between the locking and release positions.

  Furthermore, a spring 64, visible in FIG. 4A, interposed between the slide 40 and the locking lever 42 urges the locking lever 42 towards

its locking position.

  The lock 2 further comprises actuating means 70 of the locking bolt 24 and locking means 38, adapted to bring the locking bolt 24 to its release position and to bring the means of

  locking 38 towards their unlocking position.

  The actuation means 70 comprise an actuation plate 72 integral with the locking lever 42 and extending appreciably perpendicularly to the direction of movement D. The actuation means 70 further comprise a safety cylinder 74 , provided with a bit 76 adapted to be applied against the actuating plate 72. The bit 76 can be rotated around a

  axis A-A by means of a key (not shown).

  The actuating means 70 further comprise an electromagnet 78 which is fixed to the side plate 14 and which is provided with an armature integral with an actuating rod 80. The actuating rod 80 is movable in the direction D and ends with a pusher 82. The pusher 82 is placed opposite the actuating plate 72 of the locking lever 42. When the electromagnet 78 is without current, the pusher 82 is out of contact with the plate actuator 72. By cons, when the electromagnet 78 is traversed by a current, the actuator rod 80 is driven towards the actuator plate 72 so that the pusher 82 is pressed against the actuator plate

  72 and switches the locking lever 42 to its unlocking position.

  The electromagnet 78 is connected to control means, such as a badge reader (not shown) by means of two electric wires 84, 86. The lock 2 also comprises detection means 100 of the

  position of the lock 2 with respect to the door leaf 8. These detection means 100 comprise a detection finger 102 housed in the housing in a movable manner in sliding parallel to the direction C of sliding.

  The detection finger 102 is movable between a rest or extended position (FIG. 3), in which one end 104 of the finger 102 extends through the opening 22 of the front plate 16 and projects from the surface of this plate 16, and a detection or depressed position, in which the end 104 of this finger presses against the door leaf 8 and is substantially flush with the surface of

the front plate 16 (FIG. 5).

  The detection finger 102 is biased towards its rest position by a helical spring 106 disposed coaxially around the finger 102. This spring 106 is supported on a flange 108 of the finger 102 and on a support plate

  secured to the side plate 14.

  A middle part of the detection finger 102 comprises a recess 10 112 forming a surface 114 which is directed towards the locking latch 42.

  This surface 114 is applied to the locking lever 42 when the detection finger 102 is in its rest position and keeps the locking lever 42 in its unlocking position, while it releases the locking lever 42 when the finger detection 102 is in its detection position, so that the locking lever 42 is movable between its two

  locking and unlocking positions.

  It should be noted that the stiffnesses of the springs 34 and 64 are chosen to

  such that when the actuating plate 72 is pressed and when the locking lever 42 is simultaneously in its locking position, the locking lever 42 initially switches to its unlocking position without the locking lever 24 moves to its release position.

  The stiffness of the spring 106 is chosen so that it can overcome the force exerted by the spring 64 on the locking lever 42 between its locking and unlocking positions.

  The lock according to the invention operates in the manner described below

with reference to Figures 3 to 6.

  Initially, lock 2 is in the configuration shown in the

figure 3.

  The door is open, that is to say the lock 2 is released from the door leaf 8. The locking bolt 24 is in its locking position. The detection finger 102 is in its rest position, and maintains the locking lever 42 in its unlocking position. The electromagnet 78 is not

  traversed by current, so that the pusher 82 is out of contact with the actuating plate 72. The bit 76 of the safety cylinder 74 is also out of contact with the actuating plate 72.

  When the controller closes the door by sliding, the surface forming the cam 28 of the latching spout 26 is applied to the retaining member 10 and brings the locking bolt 26 to its release position. Firstly, the blocking bolt 26 is raised and drives the slide 40 upwards, until the stepped part 58 of the locking lever 42 has passed the locking pin 44. During the continuation of the closing, the detection finger 102 10 is applied to the door leaf 8 and is pushed into its detection position,

  so that the surface 114 releases the locking lever 42.

  The middle part 56 of the rocker 42 then applies against the locking lug 44, allowing movement of the locking bolt 24 in its

release position.

  When the snap-fit spout 26 has passed the retaining member 10, it snaps with its retaining surface 30 behind this retaining member. The drawer 40 moves simultaneously downwards and the locking lever 42 is

  brought into its locking position under the force of the spring 64.

  In this configuration, when an object is inserted into the gap 20 remaining between the door leaf 8 and the front plate 16, the locking bolt

  24 cannot be brought into its release position, since the abutment surface 60 of the rocker 42 comes to bear against the locking lug 44, thus locking the bolt 24 in its locking position.

  It can be seen that the lock 2 according to the invention locks automatically after closing the door.

  In order to open the door, the controller actuates the electromagnet 78, for example by means of a control device actuated by a badge (not shown). The pusher 82 then moves towards the actuating plate 72, in the direction D, and is applied to this plate (Figures 4; 4A and 6; 6A). During the movement of the pusher 82, the locking lever 42 is brought initially into its unlocking position, without the

  locking bolt 24 is driven out of its locking position.

  Once its unlocked position has been reached, the locking lever 42 is applied against the lug 62.

  Continued movement of the pusher 82 upwards moves the

  locking lever 42 and the drawer 40 integrally in the direction of displacement D5, and brings the locking bolt 24 in its release position.

The door can be opened.

  In the event of an emergency, or during a power failure, the bolt 24 can also be brought into its unlocked position by means of the safety cylinder 74. The key is then introduced into the safety cylinder 74 and a rota10 tion of the key brings the bit 76 into contact with the actuating plate 72, on the same side as the pusher 82. When the rotation continues, the locking lever 42 is brought into its release position, then the bolt locking device 24 is brought to its unlocking position, in a similar manner

  in the case of actuation by electromagnet 78.

  The lock according to the invention has good security, since the locking bolt 24 is locked automatically after the closing of

the door.

  Furthermore, the lock according to the invention is easy to manufacture and to

  assemble since it has only one actuator 20 for unlocking the locking means and unlocking the bolt.

  The fact of providing two independent means of actuation of the actuation member leads to significant safety, since when one of these means is defective, the lock can still be opened by

the other way.

  As a variant, the lock 2 is mounted on the door leaf 8. However, mounting the lock on the frame 6 is advantageous since, in this case, the supply wires 84, 86 of the electromagnet 78 are motionless

  compared to the rest of the car and are therefore subject to low wear.

  Instead of a locking bolt articulated around the axis XX, the lock 30 according to the invention can also be provided with a movable half-turn bolt sliding in the direction C. Alternatively, the electromagnet can be replaced by another device

  electric drive, for example by an electric motor.

Claims (12)

  1. Lock intended to be mounted on a leaf (8) of a door or on a frame (6) of a door, of the type comprising a locking bolt (24) adapted to cooperate with a retaining member (10) mounted on the door frame (6) 5 or on the door leaf (8), the locking bolt (24) being movable between a locking position in which it retains the lock (2) relative to the retaining member (10) and a release position in which the lock (2) is free to move relative to the retaining member (10), characterized in that it further comprises locking means (38) releasable from the locking bolt (24) in its locking position, these locking means (38) having a locking configuration in which the locking bolt is locked away from its release position and a configuration of unlocking, in which the locking bolt is free to move to its release position, that it comprises automatic means for supplying the locking means (38) in their locking configuration after the supply of the locking bolt (24) in cooperation with the retaining member (10), and in that the lock (2) comprises release means (70) locking means (38).   2. Lock according to claim 1, characterized in that the means   locking (38) are biased towards their unlocking configuration when the locking bolt (24) is out of cooperation with the retaining member (10).   3. Lock according to claim 1 or 2, characterized in that the locking means (38) comprise a locking member (42) connected to the locking bolt (24) and a complementary locking member (44), in that that the locking means (38) comprise an actuating member (72) of the locking member (42), and in that this actuating member (72) is arranged such that a biasing of this member (74), when the locking member (42) is in its unlocked position, biases the locking bolt (24) toward his liberation position.   he 4. Lock according to claim 3, characterized in that the locking means (38) comprise a drawer (40) movable in sliding, in particular in a rectilinear direction (D), this drawer (40) being adapted to bring the latch locking (24) from its locking position to its release position, 5 and in that the locking member is a rocker (42) articulated on the drawer (40) around a second axis (Z-Z).   5. Lock according to one of claims 1 to 4, characterized   in that it comprises a support (12), in that the locking bolt (24) is articulated around a first axis 10 (XX) relative to the support (12), and in that the locking bolt (24), includes a snap-on spout   (26) adapted to cooperate with the retaining member (10).   6. Lock according to one of claims 1 to 5, characterized in that   that it comprises first and second actuation means (74, 78) adapted to bring the locking means (38) into their unlocking configuration, and in that said first and second actuation means   can be operated independently of each other.   7. Lock according to claim 6, characterized in that at least one of the two actuating means is adapted to bring, during actuation, the locking means (38) into their unlocking configuration and for then bring the locking bolt (24) to its release position. 8. Lock according to claim 6 or 7, characterized in that the first actuation means comprise a safety cylinder (74) having a bit (76) and which can be actuated by a key, and in that the second means actuators include an electric drive, in particular an electromagnet (78).   9. Lock according to claim 3 and any one of claims 6 to 8 taken together, characterized in that the first and second actuating means are adapted to act on the actuating member (72) locking means (38).   10. Lock according to any one of the preceding claims,   characterized in that the automatic means for supplying the means of   rusting towards the locking configuration comprises means (100) for detecting the position of the lock (2) relative to the retaining member (10), adapted to bring the locking means (38) into their unlocking configuration when the retaining member (10) is out of cooperation with the locking bolt (24), and to allow the locking means (38) to assume their locking configuration when the locking bolt cooperates with the retaining member (10).   11. Lock according to claim 4 and claim 10 taken together, characterized in that the detection means comprise a finger 10 (102) movable relative to the support (12) and adapted to rest on the frame   (6) or on the door leaf (8), the finger (102) holding the locking lever (42) in its unlocked position when the door is open.   12. Door frame for a rail vehicle comprising a lock according to any one of the preceding claims.