FR2888602A1 - Door lock for e.g. room, has case with limiter movable between active and inactive positions, where limiter is displaced towards active position, when cylinder does not retain fixation screw in its normal position - Google Patents

Abstract

The lock has a case (1) with a limiter (55) movable between active and inactive positions. The limiter blocks the displacement of a dead bolt (7) from its locking position to its release position and is re-pushed to the active position by a spring (63). The limiter cooperates with a cylinder fixation screw so as to be maintained in the inactive position, when a cylinder is engaged in a cylinder housing (10), by the screw engaged in a cylinder fixation passage (93). The limiter is displaced towards the active position, when the cylinder does not retain the screw in its normal position.

Description

The present invention relates to a door lock to be embedded in

  a door leaf having a flush-mounted housing provided with a front faceplate, said housing having a dead bolt having a dead bolt head and a dead bolt tail, said dead bolt

  being able to move in said housing between a release position in which said dead bolt head is fully retracted into said housing and at least one locking position in which said dead bolt head protrudes from said housing through an opening provided in said housing headrest, said housing having a cylinder housing for receiving a cylinder provided with a bit adapted to cooperate with said dead bolt tail to move said dead bolt between said release position and said at least one locking position.

  The cylinder, which locks and unlocks the bolt by means of a key, is one of the main elements of a lock. However, the cylinder is also a complex and relatively fragile mechanical part, it is often the preferred target during an attempt to break the lock.

  The present invention aims to provide a lock that avoids any intrusion in a room whose door is equipped with the lock, even when a burglar attacks the cylinder of the lock. Another object of the invention is to provide a lock that can be used in site conditions, in which the key cylinders are not yet installed in the door locks and the workers have a universal removable building cylinder which they insert into the cylinder housing to open or close a door and then remove.

  For this purpose, the subject of the invention is a lock of the aforementioned type in which the housing comprises a cylinder fixing passage intended to receive a fastening means adapted to be fixed to said cylinder in a normal position for securing said cylinder. in said cylinder housing, characterized in that: said housing comprises a movable locking member between an inactive position in which said locking member allows the displacement of said dead bolt between said release position and said at least one locking position and at at least one active position in which said locking member is able to block the displacement of said deadbolt from said at least one locking position to said release position, said locking member being pushed towards said at least one active position by an elastic means , said locking member cooperating with said cylinder fixing means so as to being held in the inactive position, when a cylinder is engaged in said cylinder housing, by said fastening means engaged in said cylinder fixing passage, said locking member being able to move towards said active position when said cylinder retains not said fixing means in its normal position.

  Advantageously, said cylinder attachment passage includes an opening in said headrest and a portion of the interior space of the housing between said opening and said cylinder housing, said locking member being movable substantially transversely to said cylinder attachment passage and having a a bearing portion arranged such that, when said securing means is engaged in said fixing passage and fixed to a cylinder in said normal position, said bearing portion is in contact with said securing means for holding said locking member in said inactive position against said elastic means.

  According to one embodiment of the invention, the fastening means comprises a substantially straight rod and that said bearing portion of the locking member has an oblique orientation with respect to said rod, in the normal position of the fastening means. so that said rod can tilt under the bias of said locking member when said fastening means is not held by a cylinder in its normal position.

  Preferably, said fixing means comprises a screw, said cylinder housing being intended to receive a cylinder having a suitable threaded opening.

  According to one embodiment of the invention, said dead bolt is able to move in said casing under the control of a cylinder, on the one hand between said release position and a first locking position, and on the other hand between said first locking position and a second locking position, said locking member being adapted to be placed in a first active position bearing against said dead bolt when said locking member is not held in said inactive position by said means and that said dead bolt is in said first locking position, said dead bolt having a first stop portion adapted to abut against said locking member in said first active position, so as to prevent movement of said dead bolt from said first locking position to said second locking position but allowing the movement of said bolt sleeping from said first locking position to said release position, said locking member being adapted to be placed in a second active position bearing against said dead bolt when said locking member is not held in said inactive position by said means and that said dead bolt is in said second locking position, said dead bolt having a second stop portion adapted to abut against said locking member in said second active position, so as to prevent movement of said dead bolt from said second locking position to said first locking position.

  Advantageously, the lock comprises a locking means, movable between a rest position, in which it allows the displacement of said locking means between said inactive position and said at least one active position, and a locking position, wherein said means for locking is able to prevent the displacement of said locking member relative to said lock housing, said locking means being maintained in the rest position as the locking member is in the inactive position, said locking means being adapted to take automatically its locking position when said deadbolt is in said second locking position and said locking member reaches said second active position to prevent further movement of said locking member.

  Preferably, in said rest position, said locking means allows the displacement of said locking means between said inactive position and said first and second active positions, said locking means being held in the rest position as long as the locking member is in said first active position, said locking means being adapted to automatically assume its locking position when said dead bolt is in said second locking position and said locking member reaches said second active position.

  According to one embodiment of the invention, said locking means comprises a pin, one end of which is housed in a recess of said locking member, said pin being resiliently biased against a key of said casing, said funcet having an opening arranged so that said pin is able to engage in said opening when said dead bolt is in said second locking position and said locking member reaches said active position.

  Advantageously, said housing comprises a guiding means adapted to cooperate with said locking member to guide it in translation, so that the displacement of said locking member is substantially transverse to the displacement of said dead bolt.

  Preferably, said guide means comprises a guide groove, said locking member comprising a projecting stud adapted to slide in said guide groove.

  The invention also relates to a door lock to be embedded in a door leaf, comprising a recessed housing provided with a front faceplate, said housing comprising a dead bolt provided with a dead bolt head and a tail deadbolt, said deadbolt being adapted to move in said housing between a release position in which said deadbolt head is fully retracted into said housing and at least one locking position in which said deadbolt head protrudes from said deadbolt head; housing by an opening provided in said headrest, said housing having a cylinder housing for receiving a cylinder provided with a bit adapted to cooperate with said deadbolt tail to move said deadbolt between said release position and said at least one locking position, characterized in that: said housing comprises a locking member adapted to move in said housing enters at least one inactive position in which said locking member is adapted to cooperate with a cylinder arranged in said cylinder housing so as to allow the displacement of said dead bolt between said release position and said at least one locking position under the control of said cylinder and an active position in which said locking member is adapted to block the movement of said dead bolt from a corresponding locking position, said locking member being adjacent to said cylinder housing and having a bearing portion adapted to cooperate with a cylinder housed in said cylinder housing so as to be retained in the inactive position by said cylinder, said locking member being biased towards said active position, so that said locking member is able to move up to said active position when no cylinder holds said locking member in the inactive position and said dead bolt is in said corresponding locking position.

  Advantageously, said dead bolt has at least one abutment portion capable of abutting against said locking member in said at least one inactive position, so as to prevent the displacement of said deadbolt from said at least one locking position to said release position when the displacement is not controlled by a cylinder, said locking member having a cam surface arranged so as to be able to move said locking member to an open position, against a resilient means by cooperation of said surface camming with the bit of a cylinder housed in said cylinder housing during a rotation of said bit, said locking member in said disengaged position being arranged to allow the free movement of said dead bolt between said release position and said at least one locking position.

  According to one embodiment of the invention, the lock comprises a locking means of the locking member, movable between a rest position, wherein said locking means allows movement of said locking member relative to said lock housing and a locking position, wherein said locking means prevents movement of said locking member with respect to said lock housing, said locking means being adapted to automatically assume its locking position when said dead bolt is in said at least one locking position and that said locking member is moved in said housing, against said elastic means, beyond said disengaged position.

  Preferably, said deadbolt is able to move in said housing under the control of a cylinder, on the one hand between said release position and a first locking position, and on the other hand between said first position of locking and a second locking position, said locking member being biased by said elastic means so as to be placed in a first inactive position bearing against said dead bolt when said dead bolt is in said first locking position, said dead bolt having a first abutment portion adapted to abut against said locking member in said first inactive position, so as to prevent movement of said deadbolt from said first locking position to said second locking position and movement of said deadbolt from said first position locking to said release position, when the displacement is not controlled by a cylinder, said locking member being biased by said elastic means so as to be placed in a second inactive position with said bearing portion bearing against a cylinder housed in said cylinder housing when said dead bolt is in said second locking position, said dead bolt having a second abutment portion adapted to abut against said locking member in said second inactive position, so as to prevent the displacement of said dead bolt from said second locking position to said first locking position when the movement is not controlled by a cylinder.

  Advantageously, said dead bolt comprises a first surface located in line with a projecting piece of said locking member in the direction of the elastic biasing of the locking member, when said dead bolt is in said first locking position, said first surface being able to cooperate with said projecting piece to stop said locking member in said first inactive position, said dead bolt having a second surface located in line with said projecting piece in the direction of the elastic biasing of the locking member, when said dead bolt is in said second locking position, said second surface being set back from said first surface in the direction of the elastic biasing of the locking member and being able to cooperate with said projecting piece to stop said locking member in said active position in the absence of cylinder in ledi t cylinder housing.

  According to one embodiment of the invention, the lock includes a bolt stroke limiter movable in said casing transversely to said bolt between an inactive position, wherein said limiter allows the displacement of said dead bolt between said release position and said first and second locking positions and an active position in which said limiter is adapted to block the movement of said deadbolt from said first locking position to said second locking position, said limiter cooperating with a cylinder fixing passage for receiving a locking means; a cylinder mount adapted to attach to a cylinder in a normal position for securing said cylinder in said cylinder housing, such that said limiter is held in an inoperative position when a cylinder attaching means is engaged in said cylinder attachment passage; cylinder in said normal position, said limit r being elastically biased towards said active position so as to move towards said active position when said limiter is not retained by said fixing means in its normal position, said limiter in said active position bearing against an edge of said dead bolt when said deadbolt is in said first locking position, said edge of the deadbolt bearing a projection adapted to cooperate with said limiter to prevent movement of said deadbolt from said first locking position to said second locking position, said edge of the bolt the frame being able to slide against said limiter to permit movement of said deadbolt from said first locking position to said release position.

  Advantageously, the lock comprises a locking means of the locking member, movable between a rest position, wherein said locking means allows the movements of said locking member relative to said lock housing, and a locking position, in which said locking means prevents the displacement of said locking member with respect to said lock housing, said locking means being adapted to automatically assume its locking position when said locking member reaches said active position and said dead bolt is in said corresponding locking position.

  Preferably, said locking means comprise a pin, one end of which is housed in a recess of said dead bolt, said pin being resiliently biased against a surface of said locking member facing said dead bolt, said locking member having an aperture arranged so that said pin is able to engage in said opening when said locking member reaches said active position and said dead bolt is in said corresponding locking position.

  Advantageously, said housing comprises a guiding means adapted to cooperate with said locking member to guide it in translation, so that the displacement of said locking member is substantially transverse to the displacement of said dead bolt.

  The invention will be better understood, and other objects, details, features and advantages thereof will become more clearly apparent in the following detailed explanatory description of an embodiment of the invention given as a purely illustrative and non-limiting example, with reference to the accompanying schematic drawings.

  In these drawings: FIG. 1 is a simplified side view of the lock according to one embodiment of the invention, the lid or key of the lock housing having been removed to show the internal mechanism of the lock, showing the bolt; dormant in its release position, no key cylinder being present; - Figure 2 is a sectional view along the line II-II of the lock of Figure 1; - Figure 3 is a partial sectional view along line III-III III of the lock of Figure 1; FIG. 4 is a partial simplified side view of the lock of FIG. 1 showing the dead bolt in its single latch locking position, with no key cylinder being present; - Figure 5 is a sectional view along line V-V of the lock of Figure 4; Figure 6 is a partial sectional view along the line VI-VI of the lock of Figure 4; FIG. 7 is a partial simplified side view of the lock of FIG. 1 showing the deadbolt in its double latch locking position, the lock being equipped with a key cylinder; - Figure 8 is a sectional view along the line VIII-VIII of the lock of Figure 7; - Figure 9 is a partial sectional view along the line IX-IX of the lock of Figure 7; - Figure 10 is a view similar to Figure 9 showing the displacement of the wafer during a rotation of the bit - Figure 11 is a simplified side view of the lock of Figure 1 showing the dead bolt in its position of locking double turn, the cylinder having been removed from the cylinder housing; - Figure 12 is a sectional view along the line XII-XII of the lock of Figure 10; - Figure 13 is a sectional view along the line XIII-XIII of the lock of Figure 10; FIG. 14 is a partial simplified side view of the lock of FIG. 1 showing the deadbolt in its double latch locking position, the cylinder having been removed from the cylinder housing, the plate having been forced above its unobstructed position. ; - Figure 15 is a sectional view along the line XV-XV of the lock of Figure 14; FIG. 16 is a perspective view of the deadbolt of the lock; FIG. 17 is a perspective view of the plate of the lock; - Figure 18 is a perspective view of the limiter of the lock; FIG. 19 is another perspective view of the limiter of the lock 2888602 Referring to FIG. 1, there is shown a lock comprising a casing 1 designed to be embedded in a mortise dug in the edge of the leaf of a door (not shown) The casing 1 comprises, in a conventional manner, a casement 2, which forms one of the two large vertical faces of the casing 1, a headrest 3, which is integral with the casement 2 or rigidly fixed thereto, and which has orifices for, in use, to be secured by screws (not shown) in a shallow notch or groove formed in the edge of the door leaf, and a cover or feature 4 (Figure 2) in the form of a plate, which is extends parallel to the paddle 2 and is detachably attached thereto.

  The lock further comprises, inside the housing 1, a half-turn bolt 5, a follower 6, which is intended to be actuated by a door handle (not shown), for example of the button-type or of the stand type, for the manual actuation of the latch bolt 5, a dead bolt 7 and a cylinder housing 10 for receiving a cylinder 8 (Figure 7) adapted to be actuated by means of a suitable key.

  The latch bolt 5 conventionally comprises a head 11 and a tail 12. The head 11, for example of prismatic shape, passes through an opening 13, of substantially rectangular shape, which is formed in the headrest 3 and in which the head 11 is guided and movable in horizontal translation. The head 11 has a vertical side face which is located in a plane parallel to the paddle 2, and an opposite vertical side face which is inclined.

  The tail 12 is constituted by a cylindrical rod whose one end is fixed rigidly to the head 11 and which is slidably mounted in a bearing 14 formed by a cutout of the pallet 2. The other end of the tail 12 carries a tip 15 which is rigidly attached to said shank 12. The tip 15 in the form of a square or a rectangle whose horizontal sides have a dimension corresponding substantially to the spacing between the palet 2 and the funcet 4, in order to preventing or limiting the rotation along the longitudinal axis of the bolt shank 12, when the head 11 is fully retracted into the casing 1.

  A spring 17 is provided in the casing 1 to urge the latch bolt 5 into a rest position in which the head 11 projects partially out of the casing 1, as shown in FIG. 1. The spring 17 may be, for example, example, consisting of a compression spring, one end bears against the end piece 15 and the other end bears against a flange 2a of the flap 2. The spring 17 is held in position on the one hand by the free end of the rod 12 around which is mounted the spring 17 and secondly by a stud 18 projecting from said flange 2a around which the other end of the spring 17 is mounted.

  The follower 6 is rotatably mounted in the housing 1, so as to be rotatable about an axis of rotation B perpendicular to the plane of the pallet 2. Said follower 6 has a hole 21 non-circular, for example square, to be traversed by a driving rod or a cross-sectional leg stand controlled by a door handle (not shown). Starting from its rest position, the follower 6 can be turned clockwise about its axis of rotation by means of said drive rod, at least one of whose ends is connected to a door handle so as to rotate the follower 6 clockwise. A rocker 22 is mounted on the central hub of said follower 5. Said follower 6 comprises two fingers 6a and 6b, diametrically opposed, housed with a clearance inside two notches 28a and 28b provided in the rocker 22. The fingers 6a and 6b can drive the rocker 22 cooperating with one end of the notches 28a and 28b. The spring 17 maintains at rest, the notch 28a abuts against the finger 6a to allow the follower 6 to drive the latch 22 in rotation in the clockwise direction.

  The rocker 22 has, on its upper part, an upper lug 22a which is able to act on the tip 15 to bring the head 11 into a retracted position inside the casing 1 in a manner to be described in more detail. far. Said tab 22a bears on the end piece 15 on the side opposite the spring 17. Said toggle 22 has, on its lower part, a lower tab 22b provided with a central hole for receiving an end tab of a control lever 23. The control lever 23 consists of an elongated metal strip which cooperates with the bit 8a to cause the opening of the latch bolt 5 under the action of the cylinder 8. Thanks to the clearance of the notches 28a and 28b, the The rocker can thus rotate under the action of the control lever 23 to retract the latch bolt 5 without driving the follower 6.

  The latch 22, in the rest position of the latch 22, which also corresponds to the rest position of the latch bolt 5, is supported on an abutment means 24, at an outgrowth 22c provided on the latch 22 .

  A spring 20 is provided in the housing 1 to bias the follower into a rest position in which the follower 6 bears on the stop means 24, which corresponds to a position in which the handle is released, as shown in FIG. 1. One end of the spring 20 is in abutment against the flange 2a of the paddle 2, the other end is mounted on a pusher 19. The spring 20 is held in position on the one hand by the pusher 19 and secondly by a stud 29 projecting from the flange 2a around which the other end of the spring 20 is mounted. The pusher 19 is constituted by a metal rod T-shaped whose leg is housed in the spring 20 and whose bar 19a is supported on the one hand in a housing 6c provided in the follower 6 and on the other hand on the 20. The housing 6c allows tilting of the rod 19 relative to the follower 6. The housing 6c has a depth approximately equal to the diameter of the spring 20 so as to prevent the ejection of the rod 19. Said bar 19a has a size greater than the diameter of the spring 20 so as to allow the compression of the spring 20 when the follower 5 rotates clockwise. The rod of the pusher 19 guides the spring 20 during its compression and extension movements. The free end of the pusher 19 is able to abut against the housing 1, to limit, in cooperation with said follower spring 20, the angular displacement of said follower 6 in the clockwise direction and, consequently, to also limit the movement of retraction of the latch bolt 5 inside the housing 1, for example when the front edge of the latch bolt head 11 arrives flush with the outer face of the faceplate 3. To facilitate the assembly of components in the the lock casing, a form of stamping 27 is provided in inner projecting into the pallet 2. Said shaped form 27 being able to serve as a stop to the pusher 19, when the pusher 19 is placed in the housing with its spring 20 before mounting the follower 6, which prevents the ejection of the spring 20. Then the pusher 19 is housed in the housing 6c of the follower 5.

  The dead bolt 7, also visible in FIG. 16, comprises a bolt head 31 and a bolt tail 32. The bolt head 31 has the shape of a rectangular parallelepiped whose upper and lower sides are rounded and can slide horizontally in a corresponding opening 39 formed in the headrest 3.

  The bolt tail 32, which is integral with the bolt head 31, in particular in one piece with it, has a substantially parallelepipedal overall shape and extends in a direction transverse to the casing 1.

  If necessary, in use, a key cylinder 8 can be fixed in the housing 1 by a fixing screw 35 (FIG. 7) passing through an opening 36 of the headrest 3 and whose free end 35a is screwed into a tapped opening 9 cylinder 8. The cylinder 8 has a bit 8a adapted to act on the tail 32 and on a plate 37 interposed between the bottom of the pallet 2 and the tail 32.

  Two slots 33 are formed on the lower edge of the shank 32, so that the bit 8a can control the movement of the bolt 7 between a release position (FIG. 1), a single latch locking position (FIG. 4) and a position double latch lock (Figure 7), as will be described in detail below.

  The plate 37, also visible in FIG. 17, is arranged against the bolt tail 32 and can move transversely to the direction of translation of the dead bolt 7, in a plane parallel to the plane of the pallet 2, which corresponds to FIGS. to a vertical translation.

  The plate 37 is guided in vertical translation by stampings (not shown) provided in the housing 1 and cooperating with grooves 38 of the plate 37.

  The lower portion 99 of the wafer 37 has a triangular shape and is positioned to overlap the path of the bit 8a 30 in order to be displaced by it.

  The plate 37 has a protruding rib 37a in the thickness direction towards the bolt 7. The tab 37a has two teeth 40 of the same height. The teeth 40 are intended to cooperate with crenellations 41, 42, 43 and 44 formed on the upper face of the bolt tail 32.

  The crenels 41 and 42 have an equal depth, the slots 43 and 44 have a depth equal to each other and greater than the depth of the slots 41, 42. The depth of the slots 41 and 42 is chosen so that, when the teeth 40 cooperate with the slots 41, 42, which corresponds to the release position of the bolt 7 (Figure 1), the end 45 of the plate 37 is adjacent to the cylinder housing 10 or outside thereof, and when the teeth cooperate with the crenellations 43 and 44, which corresponds to the latch locking position of the latch 7 (FIG. 11), the end 45 being able to overlap the cylinder housing 10.

  The plate 37 is urged by a helical spring 46 towards the cylinder housing 10.

  A locking pawl 48 (FIG. 3) is disposed on the bolt shank 32, so that, when the bolt 7 is in the double latch locking position, the locking pawl 48 is aligned with the vertical axis of the cylinder housing. A. The locking pawl 48 comprises a cylindrical orifice 49 in which is housed a spring 50. The free end of the spring is engaged in a locking pin 51. The locking pin 51, biased by the spring 50, bears against the rear face of the plate 37. Two orifices 52 and 53 adapted to receive the pin 51 when aligned with it are provided on the rear face of the plate 37, along the axis A. We will now describe the operation of the lock shown in the figures. When a user rotates the door handle clockwise, the follower 6 rotates about the axis B in a clockwise direction and compresses the spring 20, the rotation being limited by the pusher 19. The finger 6a of the follower 6 causes, by cooperation with one end of the notch 28a provided in the latch 22, the latch 22 which rotates about the axis B, in the same direction. The upper lug 22a of the rocker 22 acts on the tip 15, the latter then making a horizontal translation to the opposite side to the headrest 3. This results in a translation in the same direction and the same distance from the tail 12 and 11 of the head 11. The head 11 is then in the retracted position in the housing 1.

  When the user releases the handle, the spring 20 relaxes, which causes a rotation of said follower 6 in the counterclockwise direction, to the rest position of the follower in which it bears against the stop means 24 Simultaneously, the spring 17 relaxes by pushing the tip 15 towards its rest position. The tip 15 drives the rocker 22 which rotates in the counterclockwise direction until the projection 22c of the rocker 22 is locked against the stop means 24. The upper leg 22a of the rocker 22 retains then the tip 15, such that the latch bolt 5 is in its rest position.

  We will now describe a locking operation of the dead bolt 7. To perform this locking operation, starting from the position in which the dead bolt 7 is fully retracted into the housing 1, which corresponds to a release state of the bolt 7, shown in Figure 1, the user enters his key in the cylinder 8 of the lock barrel and rotates the cylinder 8, by means of the key, in the trigonometric direction. The bit 8a slides against the inclined edge 98 of the lower portion 99 of the plate 37 in the manner of a cam, which has the effect of translating it upwards of the housing 1 to a normal open position and therefore to the release slots 39 and 41 in which the teeth 40 of the wafer 37 were engaged (Figure 10). At the same time, the bit 8a engages in a first slot 33 of the shank 32. The shank 32 translates horizontally towards the headrest 3 by a distance equivalent to the distance between the two slots 33 of the shank 32. When the user continues to turn the key counterclockwise, the blade 8a disengages the slot 33 of the tail 32 and the plate 37 whose teeth 40 are re-engaged in the slots 42 and 43. The bolt 7 is then in a latching state simple turn, shown in Figures 4 and 6. In this state, one of the teeth 40 is supported on the bottom of the crenel 42 and the end 45 is therefore outside or at least substantially adjacent to the cylinder housing 10 without touching the cylinder (not shown). The second tooth 40 is not in contact with the bottom of the slot 43 because of the greater depth of this slot. Note that to move from the unlocked state to the state of single-turn closure, the cylinder 8 has a rotation of 360 about its axis of rotation.

  When starting from this state of simple locking, a user enters his key into the cylinder 8 and turns the rotor of the cylinder 8, by means of the key, in the counter-clockwise direction, the bolt 7 passes 2888602 16 in a double latch lock state in a similar manner to the transition from the release state to the latch simple latch state. In this state, the end 45 of the plate 37 bears on the top of the cylinder 8, a gap J remains between the teeth 40 and the bottom of the crenellations 43 and 44. This state is shown in FIGS. 7 and 9.

  An unlocking operation of the dead bolt 7 is performed in a similar manner. In the continuity of this operation, the bit 8a acts on the control lever 23, which has the effect of translating it to the top of the housing 1. The translation of the control lever 23 causes a rotation of axis B of the rocker 22 in a clockwise direction, which has the effect of translating the latch bolt 5 horizontally in the opposite direction to the headrest 3 until the head 11 is retracted into the housing 1. The notches 28a and 28b allow a rotation of the rocker 22 clockwise without driving the follower 6.

  We will now describe a locking of the lock during an attempted break-in, the bolt 7 being in the double latch locking position, as shown in FIG. 7. When a burglar tries to force the lock, and reaches removing the cylinder 8 from the housing 10, nothing holds the plate 37 in the position of FIG. 7.

  In this case, the plate 37, biased by the spring 46, makes a vertical downward translation of the housing 1 to a locking position, that is to say until the teeth 40 are in position. bearing on the bottom of the slots 43 and 44, as shown in FIG. 11. In this position, the pin 51 is located at the orifice 52. The pin 51 is biased by the spring 50 towards the plate 37, it engages in the orifice 52 (Figure 13). This has the effect of securing the bolt 7 and the plate 37 permanently. The lock is then in a locked state. In this state, when the burglar acts on the bolt 7 to enter the housing 7, the plate 37 opposes this movement because projecting portions of the housing 1 are engaged in the grooves 38 and the anterior surfaces 96 of the slots 43 and 44 abut against the teeth 40. The burglar can also not disengage the teeth 40 of the plate 37 from the bolt shank 32 because the pin 51, housed in the orifice 52, prevents the vertical displacement of the plate 37. The thickness of the bolt 7 and the thickness of the plate 37 being substantially equal to the total thickness of the housing 1, the pin 51 can not be released from the orifice 52 without removing the lock. The burglar can not force the lock.

  To prevent the case where the burglar still succeeds in moving the wafer upwards, for example if the pin 51 has not engaged in the orifice 52, a second blocking orifice 53 is provided on the wafer 37. In this case, the burglar must, after having withdrawn the cylinder 8, manually reassemble the plate 37 so that the teeth 40 disengage from the bolt shank 32 (FIG. 14). In this case, however, it is difficult to precisely control the stroke of the wafer 37.

  The orifice 53 is positioned just below the point of the plate 37 located at the right of the pin 51 in the normal open position of the wafer. Thus, as soon as the plate 37 is raised beyond its normal open position and the pin 51 engages in the orifice 53 (Figure 15). The lock is then in a locked state, similar to what has been described above, making it impossible to move the bolt 7.

  We will now describe the case where the cylinder 8 is removed when the bolt 7 is in the release position or in the latch single latch position, as shown in Figures 1 and 4. In this case, one of the teeth 40, in resting on the bottom of the slot 42, prevents the displacement of the plate 37 towards the cylinder housing 10. In addition, when the bolt 7 is in the release position or in the latch single locking position, the orifices 52, 53 are offset laterally relative to the pin 51. In this respect, it should be noted that the locking pawl 48 is not in the same plane of section as the orifices 52 and 53 in FIGS. 3 and 6. The lock can not therefore be place in a secure state. The bolt 7 can then be moved between its release position and its latch single latch position without risk of locking the lock. This is of interest for example on a building site, especially when no cylinder 8 has not yet been housed in the cylinder housing 10. In this case, the workers use a key acting as a bit to actuate the lock. This key, also called a construction cylinder, does not remain permanently in the cylinder housing 10.

  However, if a worker inadvertently closes the double-turn lock and removes the work cylinder from the cylinder housing 10, the wafer 37 is no longer held by the slot 42 and the lock takes up its abovementioned locked position. It is therefore interesting to provide a system to prevent the lock from being closed to double turn, for example when on a construction site.

  For this, a limiter 55, also shown in Figures 18 and 19, can be provided. The limiter 55 is generally in the form of an L-shaped block. The portion 56 forming the large bar of the L has a substantially parallelepipedal shape and extends vertically from the lower edge of the case 1. The top of the bar 56 comprises a recess 57, one of the edges 58, substantially vertical, forms an abutment zone capable of abutting against an outgrowth 59 of the bolt 7 when the latter is in the latch-locking position (FIG. 4), as will be described in detail below.

  Two studs 60 protruding rectangular shape are provided on the face of the bar 56 facing the paddle 2, the pads 60 being intended to be inserted into a groove 61 of the paddle 2, visible in Figure 2, to allow vertical guidance the limiter 55 in the housing 1, that is to say transversely to the bolt 7.

  As can be seen in FIG. 1, on its lower face, the bar 56 comprises an orifice 62 in which a spring 63 is housed, the other end of the spring 63 being fixed to the casing 1. The limiter 55 is thus resiliently biased by the spring 63 to the bolt 7.

  A lateral face 64 of the limiter 55 comprises an orifice 65 of substantially cylindrical shape in which is housed a spring 66. The free end of the spring 66 is engaged in a locking pin 67.

  The locking pin 67 is biased by the spring 66 against the funcet 4 and constitutes a locking pawl 88 of the limiter. The function 4 comprises an orifice 68 adapted to receive the pin 67, when it is at the right of the orifice 68.

  The portion 69 of the limiter forming the small bar of the L extends substantially horizontally in the housing 1, in the opposite direction to the headrest 3. The bar 69 has a bore 94. The opening 36 and the bore 94 constitute a passage screw 93 for receiving a fixing screw 35 for securing a key cylinder in the cylinder housing 10.

  An inclined ramp 70 extends along the bar 69, a portion of the ramp 70 being defined by the lower part of the bore 94.

  The inclination makes it possible more particularly to introduce a screw into the bore 94 when the limiter 55 is initially in the active position, as will be described in detail below. When the screw 35 is retained by the cylinder 8 in a normal position, which corresponds to a position in which the screw 35 is screwed perpendicularly into the cylinder 8 housed in the cylinder housing 10, the end 71 of the ramp is in contact with the screw 35, which keeps the limiter 55 in an inactive position in which the edge 58 does not cut the trajectory of the protrusion 59.

  We will now describe the operation of the limiter 55, the bolt 7 being initially in the release position. When no screw is disposed in the screw passage 93 or at least held in the normal position by a cylinder 8, the limiter 55, which is not retained in the inactive position and is biased by the spring 63 towards the 7, is in an active position, in which the upper face 92 of the limiter 55 is supported on the lower face 91 of the bolt 7. This state is shown in FIG. 1. When a worker places the bolt 7 in the single latch locking position, the protrusion 59 abuts against the stop 58 (Figures 4 and 5). In this case, the limiter 55 opposes the movement of the bolt 7 beyond the latch single latch position, that is to say to the double latch lock position. The limiter 55 thus provides a limitation and safety function, particularly when the lock is used on a construction site and does not yet have a cylinder 8, to limit the movement of the bolt 7 between the release position and the locking position simple turn, which allows in particular to prevent the lock from taking its locked position.

  When a cylinder is put into place in the cylinder housing 10, a screw 35 is inserted into the opening 36 to secure the cylinder in the cylinder housing 10. Initially, the limiter 55 is in the active position (FIG. 4). In this position, the end 100 of the ramp 70 is substantially in line with the opening 36, which facilitates the insertion of the screw 35 into the bore 94. The inclination of the ramp 70 allows the limiter 55 to be moved progressively to the inactive position when the screw is inserted into the bore 94. When the screw 35 has passed through the bore 94, it is fixed in the cylinder, so as to maintain on the one hand the cylinder in the housing 10 and on the other hand the limiter 55 in the inactive position. This state is shown in Figures 7 and 8.

  During an attempted break-in, for example when the cylinder 8 is torn off the cylinder housing 10, it no longer holds the fastening screw 35 in its normal position, and the limiter 55 is no longer retained in its inactive position. In this case, when the limiter 55 takes its active position, it can also provide a protection function against an attempted break-in.

  The protection function of the limiter 55 will now be described during an attempted break-in, starting from a state shown in FIG. 7 in which the bolt 7 is in the double latch locking position. Note that as the screw 35 is held in the normal position, the limiter 55 does not cut the path of the bolt 7 (Figure 8) which can be moved between the release position and the double latch lock position. When the fixing screw 35 is broken or bent or is no longer held by the cylinder 8 in the normal position, for example if a burglar breaks the cylinder in the middle, the limiter 55 is moved by the spring 63 towards the bolt 7. The bolt 7 being in the double latch lock position, it does not hold the limiter 55 and it moves to an active position in which the limiter 55 engages behind the bolt head 31 so that the face front 89 of the limiter forms a stop against which the rear face 90 of the bolt head is stopped, thus preventing the bolt 7 to return to the inside of the lock housing. In this position, the screw is substantially parallel to the ramp 70. The inclination of the ramp 70 limits the necessary inclination of the screw 35 to obtain a given stroke of the limiter 55. In addition, the pin 67 is located then at the right of the orifice 68 and engages in the orifice 68 (Figures 11 and 12). Due to the presence of the pin 67 in the orifice 68, the limiter 55 can not be returned to its inactive position even if the burglar tries to act on him by urging him down. In this position the limiter 55 opposes a movement of the bolt 7 to the release position. The lock is blocked. The limiter 55 has in this case a function of blocking member.

  The plate 37 cooperating with the locking pawl 48 and the limiter 55 provided with the locking pawl 88 thus have functions of complementary locking members and make it possible to protect the lock against attacks of different types. Thus, depending on the type of attack, one or other of these locking members is triggered. For example, if the screw 35 remains in place but you touch the cylinder or the bit, the plate 37 falls, and if the screw 35 moves, for example when the screw is broken in the middle, the limiter 55 is blocked. These means can be used in combination or separately, so as to protect the lock against all attempts of burglary.

  These locking members may be adapted to locks comprising kinematic members of all types. In particular, the lock can be a single latch lock, in this case the limiter 55 ensures only its function of locking member.

  The pin 51 can be mounted indifferently on the bolt 7 or on the plate 37. The pin 67 can be mounted indifferently on the limiter 55 or on the funcet 4.

  The wafer, which ensures on the one hand the function of holding the bolt in the first and second locking positions and on the other hand the locking member function, could be replaced by two separate parts, for example two plates arranged in parallel. on both sides of the bolt.

  Although the invention has been described in connection with several particular embodiments, it is obvious that it is not limited thereto and that it includes all the technical equivalents of the means described and their combinations if they are within the scope of the invention.

Claims (19)

  1. A door lock to be mounted in a door leaf, comprising a housing (1) to be fitted with a front faceplate (3), said housing comprising a deadbolt (7) provided with a deadbolt head (31). ) and a dead bolt tail (32), said dead bolt being able to move in said housing between a release position in which said bolt head is fully retracted into said housing and at least one locking position in wherein said deadbolt head protrudes from said housing through an opening (39) provided in said headrest, said housing having a cylinder housing (10) for receiving a cylinder (8) provided with a bit (8a) adapted to cooperate with said dead bolt tail for moving said dead bolt between said release position and said at least one locking position, said housing having a cylinder attachment passage (93) for receiving a bolt fastener (35) adapted to be fixed to said cylinder in a normal position to fix said cylinder in said cylinder housing, characterized in that: said housing comprises a locking member (55) movable between an inactive position in which said member blocking device allows the displacement of said deadbolt between said release position and said at least one locking position and at least one active position in which said locking member is able to block the displacement of said deadbolt from said at least one locking position towards said release position, said locking member being pushed towards said at least one active position by an elastic means (63), said locking member cooperating with said cylinder fixing means so as to be held in the inactive position, when a cylinder is engaged in said cylinder housing, by said fastening means engaged in said fixing passage cylinder, said locking member being adapted to move to said active position when said cylinder does not retain said fixing means in its normal position.   2. Lock according to claim 1, characterized in that said cylinder fixing passage (93) comprises an opening (36) in said headrest (3) and a portion of the interior space of the housing (1) between said opening and said cylinder housing (10), said locking member (55) being movable substantially transversely to said cylinder attachment passage and having a bearing portion (71) disposed so that when said securing means (35) is engaged in said fixing passage and fixed to a cylinder in said normal position, said bearing portion is in contact with said securing means for holding said locking member in said inactive position against said elastic means (63).   3. Lock according to claim 2, characterized in that the fastening means (35) comprises a substantially straight rod and that said bearing portion (71) of the locking member (55) has an oblique orientation with respect to said rod, in the normal position of the fixing means, so that said rod can tilt under the load of said locking member when said fixing means is not retained by a cylinder in its normal position.   4. Lock according to claim 3, characterized in that said fixing means (35) comprises a screw, said cylinder housing (10) being adapted to receive a cylinder having a suitable threaded opening (9).   5. Lock according to any one of claims 1 to 4, characterized in that said dead bolt (7) is adapted to move in said housing (1) under the control of a cylinder (8), on the one hand between said release position and a first locking position, and secondly between said first locking position and a second locking position, said locking member (55) being adapted to be placed in a first active position bearing against said dead bolt when said locking member is not held in said inactive position by said fixing means (35) and said dead bolt is in said first locking position, said dead bolt having a first stop portion (59) able to abut against said locking member in said first active position, so as to prevent the displacement of said dead bolt from said first locking position to said second position locking but allow the displacement of said dead bolt from said first locking position to said release position, said locking member (55) being adapted to be placed in a second active position bearing against said dead bolt (7) when said locking member is not held in said inactive position by said fixing means (35) and said dead bolt is in said second locking position, said dead bolt having a second stop portion (59) adapted to abut against said locking member in said second operative position, so as to prevent movement of said deadbolt from said second locking position to said first locking position.   6. Lock according to one of claims 1 to 5, characterized in that it comprises a locking means (67) movable between a rest position, wherein it allows the displacement of said locking means (55) between said inactive position and said at least one active position, and a locking position, wherein said locking means is adapted to prevent movement of said locking member relative to said lock housing, said locking means being held in the rest position as the locking member is in the inactive position, said locking means being adapted to automatically take its locking position when said dead bolt (7) is in said second locking position and said locking member reaches said second position active to prevent further movement of said locking member.   7. Lock according to claims 5 and 6 taken in combination, characterized in that in said rest position, said locking means (67) allows the displacement of said locking means (55) between said inactive position and said first and second positions. active, said locking means being maintained in the rest position as the locking member is in said first active position, said locking means being adapted to automatically take its locking position when said dead bolt is in said second position of locking and that said locking member reaches said second active position.   8. Lock according to claim 7, characterized in that said locking means comprises a pin (67), one end is housed in a recess (65) of said locking member (55), said pin being biased resiliently against a funcet (4). ) of said housing, said funcet having an opening (68) arranged in such a way that said pin is able to engage in said opening when said dead bolt (7) is in said second locking position and that said locking member (55) reached said active position.   9. Lock according to any one of claims 1 to 8, characterized in that said housing comprises a guide means (60, 61) adapted to cooperate with said locking member (55) to guide it in translation, so that the displacement of said locking member is substantially transverse to the movement of said dead bolt (7).   10. Lock according to claim 9, characterized in that said guide means comprises a guide groove (61), said locking member (55) having a projecting stud (60) slidable in said guide groove.   11. Door lock to be mounted in a door leaf, comprising a casing (1) to be fitted with a front end (3), said casing comprising a dead bolt (7) provided with a dead bolt head (31). ) and a dead bolt tail (32), said dead bolt being able to move in said housing between a release position in which said bolt head is fully retracted into said housing and at least one locking position in wherein said deadbolt head protrudes from said housing through an opening (39) provided in said headrest, said housing having a cylinder housing (10) for receiving a cylinder (8) provided with a bit (8a) adapted to cooperate with said deadbolt tail for moving said deadbolt between said release position and said at least one locking position, characterized in that: said housing comprises a locking member (37) adapted to be displaced acer in said housing between at least one inactive position in which said locking member is adapted to cooperate with a cylinder arranged in said cylinder housing so as to allow the displacement of said dead bolt between said release position and said at least one position of locking under the control of said cylinder and an active position in which said locking member is able to block the movement of said deadbolt from a corresponding locking position, said locking member being adjacent to said cylinder housing and having a bearing portion ( 99) adapted to cooperate with a cylinder housed in said cylinder housing so as to be retained in the inactive position by said cylinder, said locking member being biased toward said active position, so that said locking member is adapted to move to said active position when no cylinder holds said organ blocking in the inactive position and that said dead bolt is in said corresponding locking position.   12. Lock according to claim 11, characterized in that said dead bolt (7) has at least one abutment portion (96) adapted to abut against said locking member (37) in said at least one inactive position, so as to preventing movement of said deadbolt from said at least one locking position to said release position when the motion is not controlled by a cylinder (8), said locking member having a cam surface (99) arranged to able to move said locking member to an unlocked position, against an elastic means (46) by cooperation of said cam surface with the bit (8a) of a cylinder housed in said cylinder housing in the course of a rotation of said bit, said locking member in said disengaged position being arranged to allow the free movement of said dead bolt (7) between said release position and said at least one position lock ion 13. Lock according to claim 12, characterized in that it comprises a locking means (48) of the locking member (37) movable between a rest position, wherein said locking means allows the movement of said organ blocking means with respect to said lock housing, and a locking position, wherein said locking means prevents movement of said locking member with respect to said lock housing, said locking means being adapted to automatically assume its locking position when said deadbolt (7) is in said at least one locking position and that said locking member is moved in said housing, against said resilient means (46), beyond said disengaged position.   Lock according to claim 12 or 13, characterized in that said dead bolt (7) is able to move in said casing (1) under the control of a cylinder (8), on the one hand between said position release and a first locking position, and secondly between said first locking position and a second locking position, said locking member (37) being biased by said resilient means (46) so as to place itself in a first inactive position in support against said dead bolt when said dead bolt is in said first locking position, said dead bolt having a first stop portion (42) able to abut against said locking member in said first inactive position, so as to preventing movement of said deadbolt from said first lock position to said second lock position and movement of said deadbolt from said lock position e first locking position to said release position, when the displacement is not controlled by a cylinder, said locking member being biased by said elastic means (46) so as to be placed in a second inactive position with said portion of said support (99) bearing against a cylinder housed in said cylinder housing (10) when said dead bolt is in said second locking position, said dead bolt having a second abutment portion (43, 44) adapted to abut against said locking member in said second inactive position, so as to prevent movement of said deadbolt from said second locking position to said first locking position when the motion is not controlled by a cylinder.   15. Lock according to claim 14, characterized in that said dead bolt (7) has a first surface (42) located in line with a projecting piece (37a) of said locking member (37) in the direction of the solicitation elastic of the locking member, when said dead bolt is in said first locking position, said first surface being adapted to cooperate with said projecting piece to stop said locking member in said first inactive position, said dead bolt having a second surface (43, 44) being in line with said projecting piece in the direction of the elastic biasing of the locking member, when said dead bolt is in said second locking position, said second surface (43, 44) being recessed said first surface (42) in the direction of the elastic biasing of the locking member and being adapted to cooperate with said protruding piece for arr b said locking member in said operative position in the absence of cylinder in said cylinder housing.   16. Lock according to claim 14 or 15, characterized in that it comprises a limiter (55) of travel of bolt movable in said housing (1) transversely to said bolt between an inactive position, wherein said limiter allows the movement of said bolt frame (7) between said release position and said first and second locking positions and an active position in which said limiter is adapted to block the movement of said deadbolt from said first locking position to said second locking position, said cooperating limiter with a cylinder attachment passage (93) for receiving a cylinder attachment means (35) adapted to attach to a cylinder (8) in a normal position for securing said cylinder in said cylinder housing (10), whereby said limiter is held in the inoperative position when a cylinder attachment means is engaged in said cylinder attachment passage in said normal position, said limiter being urged elastically towards said active position so as to move towards said active position when said limiter is not retained by said fixing means in its normal position, said limiter in said active position being in bearing against an edge of said deadbolt when said deadbolt is in said first locking position, said edge of the deadbolt bearing a projection (59) adapted to cooperate with said limiter to prevent movement of said deadbolt from said first locking position to said second locking position, said edge of the deadbolt being adapted to slide against said limiter to permit movement of said deadbolt from said first locking position to said release position.   17. Lock according to any one of claims 11 to 16, characterized in that it comprises a locking means (48) of the locking member (37) movable between a rest position, wherein said means of condemnation authorizes the movements of said locking member relative to said lock housing, and a locking position, wherein said locking means prevents movement of said locking member relative to said lock housing, said locking means being adapted to take automatically its locking position when said locking member reaches said active position and said deadbolt is in said corresponding locking position.   18. Lock according to claim 17, characterized in that said locking means comprises a pin (51) whose end is housed in a recess (49) of said dead bolt (7), said pin being elastically biased against a surface of said member of blocking (37) facing said dead bolt, said locking member having an opening (52, 53) arranged in such a way that said pin is able to engage in said opening when said locking member reaches said active position and said bolt frame is in said corresponding locking position.   19. Lock according to any one of claims 11 to 18, characterized in that said housing comprises a guide means adapted to cooperate with said locking member to guide it in translation, so that the displacement of said locking member is substantially transverse to the movement of said dead bolt.