FR2792964A1 - ELECTRICALLY OR MECHANICALLY MANEUVERABLE LOCK - Google Patents

Abstract

Transmission mechanism (20) comprises shaft (25) having actuating lever (26), and two maneuvering arms (30, 31), each placed one end of shaft, and perpendicularly to it. Maneuvering arm (30) is linked to shaft (14a) via clutch mechanism (35). Element forming clutch release fork (40) is placed between clutch mechanism and web mechanism (15).

Description

"Electrically or mechanically operable lock" The invention is

  relates to an electrically or mechanically operable lock, more particularly of the type comprising a bolt capable of being moved, either by an electric motor, or by the bit of a manually operated mechanism, comprising for example a safety block, actuated by a key. The invention relates more particularly to an arrangement ensuring compatibility between these two types of control, at any point in the travel of the bolt. There are several types of lock, also called electric locks, comprising at least one bolt capable of being operated by an electric motor controlled remotely by a suitable electronic management and control system. Some of these locks are electrically operable in both directions, that is to say on opening and closing. In normal use, the lock is controlled by the electric motor. Advantageously, the lock may further comprise a mechanism with

  bit, for possible manual actuation, via a key.

  For example, a known lock of this type comprises a transmission of the screw / nut type arranged between the motor and the bolt slidably mounted in a support. An additional transmission is provided between the bolt and said bit mechanism so that the lock can be operated

  manually, typically using a key.

  However, said bit mechanism can only engage properly with this additional transmission if the bolt is fully retracted or completely extended. This peculiarity can be the cause of a malfunction if, for one reason or another, the bolt is in the intermediate position. In this case, the lock is impossible to maneuver from the key. The invention overcomes this drawback. The invention ensures perfect compatibility of movement between the part of the transmission mechanism arranged between the motor and the bolt, on the one hand, and the other part of the transmission mechanism arranged between the bit and the bolt, on the other hand , the bit mechanism can take over from the

  motor at any time and for any position of the bolt.

  More particularly, the invention relates first of all to an electrically or mechanically operable lock, of the type comprising a bolt, an electric motor and a bit mechanism, said bolt being associated with both said motor and said bit mechanism via a transmission mechanism, characterized in that said transmission mechanism comprises a shaft provided with an actuating lever coupled to said bolt and two operating arms respectively coupled to said motor and to a rack capable of being driven by said bit, in that a clutch mechanism is interposed between the motor shaft and one of the operating arms and in that a disengaging fork element is movably mounted between said clutch mechanism and said mechanism with bit, part of said fork member cooperating with said bit on a portion of the path thereof corresponding substantially during its engagement race with said rack to maintain said clutch in the disengaged position when said bit is in position to effectively drive said rack. Typically, the above-mentioned bit mechanism can be a locking block with a safety barrel, also called a safety block, operable by a key and incorporating such a bit. We can for example use a block

  safety standard, called "European".

  According to a preferred embodiment, the bolt is slidably mounted, following a rectilinear path, in a guide block and the latter is installed between said bit mechanism, on the one hand and the engine and its clutch mechanism, somewhere else. The aforementioned shaft of the transmission mechanism is perpendicular to the direction of movement of the bolt; it crosses the guide block and is guided in rotation therein. Said actuating lever is located inside the guide block to cooperate directly with the bolt while the two operating arms are fixed to the ends of the shaft, perpendicular to it and on both sides of the guide block. One of the operating arms is connected to the clutch, while the other is connected to a

  sliding moving element carrying said rack.

  The actuation lever can be a simple rod fixed to the shaft perpendicular to the latter and coupled to said bolt. For example, this rod can be engaged in a recess made in the bolt and retained in it

  by a stop passing through said recess.

  According to a preferred embodiment, the clutch mechanism comprises a disc coaxial with the motor shaft and mounted with the possibility of sliding relative to the latter. A finger protrudes from this disc parallel and at a distance from the axis of the motor. It is engaged in a cutout of the corresponding neighboring operating arm. In addition, rotational securing means are arranged between the shaft and the disc and urged to cooperate by a spring pushing the disc in the direction of the guide block. The disengaging fork element is a slide guided in translation parallel to the direction of the axis of rotation of the motor and extending on either side of the guide block in order to be able to cooperate with the

  clutch mechanism on the one hand, and with the bit on the other hand.

  For example, this slide can be maintained and guided by the guide block. One end of the slide is engaged in an annular groove formed at the periphery of the disc. In this way, said slide can actuate the clutch mechanism and more particularly place it in the disengaged position when it is pushed back by the bit. To do this, the slider forms or comprises a stop extending transversely to its

  own direction of movement in the vicinity of part of the bit path.

  The rack is also secured to a movable assembly mounted to slide parallel to the direction of movement of the bolt and coupled to the arm of

corresponding neighbor maneuver.

  The invention will be better understood and other advantages thereof

  will appear more clearly in the light of the description which follows given

  by way of example only and with reference to the accompanying drawings in which: - Figure 1 is an elevational view of the lock, the mechanism being in a position such that it can be operated by a motor; - Figure 2 is a view along arrow II of Figure 1; Figure 3 is an exploded perspective view of the transmission mechanism; - Figure 4 is a view similar to Figure 1, the mechanism being shown at the start of an operation of the lock via the bit; and - Figure 5 is a partial view similar to Figure 4, the mechanism being shown at the end of an operation of the lock by means of the bit. The lock 11 shown consists of a bolt 12 slidably mounted in a guide block 13, an electric motor 14, here of the geared motor type and a bit mechanism 15. This mechanism recognizes a locking block with Security barrel of standard type called "European" maneuverable by a key. The aforementioned bit 16 is that of said locking block. The lock further comprises a transmission mechanism 20 arranged between the motor 14, the bolt 12 and said bit mechanism 15, and the different elements of which are arranged, as will be seen below, on either side of the block

guide 13 of said bolt 12.

  In the example described, the axis of rotation of the motor shaft, the axis of sliding of the bolt and the axis of rotation of the barrel of the locking block are

  are located in three orthogonal directions between them.

  The subsets defined above are all installed on the same

base 22.

  The transmission mechanism 20 comprises a shaft 25 provided with an actuating lever 26. The shaft passes through the guide block 13 of the bolt and it is guided in rotation therein. The actuating lever 26 is housed in a cavity of the guide block. This lever 26 is here a simple rod fixed by one end to the shaft, perpendicular to its axis. The free end of the actuating lever is engaged in a recess 27 of said bolt, the rod 26 is retained in this recess by means of a pin 28 forming a rear stop. In this way, the actuating lever 26 pivoting with the shaft 25 is coupled with clearance to said bolt 12; it is therefore likely to cause the latter in one or other of the possible sliding directions, inside said guide block. So this is the rotation

  of the shaft 25 which controls the movement in or out of the bolt.

  The shaft is also provided with two operating arms 30, 31 each being located at one end of the shaft 25 and perpendicular thereto. In the example, the two operating arms are in the same plane as the actuation lever. The operating arm 30 is coupled to the shaft 14a of the engine by means of a clutch mechanism 35, while the operating arm 31 is coupled to a rack 37 capable of being driven by the bit 16. The clutch and the rack are located on either side of the guide block 13 of the bolt. More specifically, the guide block is installed between the bit mechanism, on the one hand, and said motor and its mechanism

clutch, on the other hand.

  According to a remarkable characteristic, a disengaging fork element 40 is mounted to move between the clutch mechanism 35 and the bit mechanism 15. On the side of the latter, part of the fork element cooperates with the bit on a portion the path 16a thereof (FIG. 1) corresponding substantially to its stroke of engagement with the rack 37. The element forming the clutch release fork is therefore pushed back by the bit 16 at the same time as the latter actuates the rack 37, to keep the clutch in the disengaged position when the bit is in position

  to actually drive the rack.

  In the example described, the element forming the clutch release fork 40 is a slide guided in translation parallel to the direction of the axis of rotation of the motor and extending on either side of the guide block. On the side of the bit 16, the slide 40 has a folded end portion 44 which therefore constitutes a stop extending transversely to its own direction of movement. The stop therefore extends in the vicinity of the part concerned with the

path of the bit.

  As seen in Figure 3, the slider is actually guided in a double groove 45 formed on the mounting face of the guide block. Thus, the simple mounting of the guide block on the base 22 is sufficient to retain the slide between the guide block and said base, the latter being subject to move in a direction parallel to the axis of the motor 14, for the operation of the clutch mechanism. The latter comprises a disc 47 coaxial with the shaft 14a of the motor and slidably mounted on a cylindrical support 48 itself fixed to said shaft 14a. The support 48 has a shoulder 49 and a helical spring 50 is mounted in compression between this shoulder and a face of the disc 47. A finger 52 is carried by the disc; he is

  oriented parallel to the axis of rotation of the disc which is also that of the motor.

  The finger 52 is engaged in a cutout 53 of the maneuvering arm 30. Rotational securing means are arranged between the motor shaft (more particularly the support 48 fixed thereon) and the disc. These rotational securing means are urged to cooperate, that is to say urged towards an effective securing position, in rotation, between the disc 47 and the support 48, by the spring which pushes said disc 47 in the direction of the bolt. . In the example, the rotational securing means consist of a diametrical groove 55 (made on the face of the disc opposite to that against which the spring 50 bears) and a pin 56 fixed transversely to the end of the support 48. The groove 55 is of such dimensions that the pin can engage in it and, in this case, the disc 47 and the support 48 are integral in rotation, this attachment being confirmed by the force of the spring. On the other hand, the declutching fork element 40 is capable of acting on the disc and, by compressing the spring, of axially separating the disc and the support 48. In this case, said clutch mechanism 35 is disengaged. To do this, the slide constituting the element forming the release fork 40 is engaged by one end in an annular groove 59 formed at the periphery of the disc. Thus, when the slide is pushed back by the bit 16, it drives the disc 47 against the force of the spring 50, which releases the pin 56 from the

  diametral groove 55 and separates the shaft 25 from the motor.

  As can be clearly seen in FIG. 3, the end of the slide located on the side of the clutch mechanism is folded back at 90 and has a notch 60, so that the folded part of the slide is engaged in

the annular groove 59 of the disc.

  On the other side of the guide block, the rack 37 is integral with a movable assembly 63 slides slidingly parallel to the direction of movement of the bolt. This moving element is coupled to the neighboring operating arm 31, fixed at the other end of the shaft 25. The moving element is mounted along

  guide block 13 and slides in a groove thereof, of suitable profile.

  The operating arm 31 carries a rod 64 parallel to the axis of the engaged motor

  in two parallel lights 65 of the moving assembly.

  Inside the recess 27 formed in the bolt, an overhanging recess 68 has been formed such that the end of the rod constituting the actuating lever 26 bears on said recess when said recess rod occupies an extreme position for which the bolt 12 has extended as far as possible from the guide block 13. This bracing prevents the bolt from turning back under the effect of an external stress. Under these conditions, the bolt can only retract in the guide block under the effective action of the motor 14 or the bit 16 of the locking block. Position sensors, not shown, are used to control a management and control system

  electronic ensuring the operation of the lock via the motor.

  In normal situation, the lock is controlled as a priority by means of this motor. However, the bit mechanism, in this case the locking block, controlled by key, makes it possible to take over at any time, whatever the position of the bolt, in particular in the event of failure of the electrical control. In this case, as can be seen in FIGS. 4 and 5, the bit 16 meets the transverse stop and pushes the element forming the clutch release fork 40 at the same time as it begins to cooperate with the rack. This situation is illustrated in FIG. 4 and it can be seen that the displacement of the fork-forming element leads to the disengagement in rotation between the disc 47 and the pin 56 and consequently, the disengagement and the deactivation of the engine 14. The rotation bit over a little more than one turn, causes the bolt to run for the whole of its travel, both at the opening and at the

closing.

  The shape of the rack 37 is such that several spans a, b, c, d are defined, with which the bit 16 is likely to come into contact, upon opening and / or closing. These ranges are significantly

  parallel and result from the overall U shape of the rack.

  The shapes and locations of these spans are such that the bit can cooperate with one of them regardless of the position in which the

  rack is immobilized.

Claims (12)

  1- Electrically or mechanically operable lock, of the type comprising a bolt (12), an electric motor (14) and a bit mechanism (15), said bolt being associated with both said motor and said bit mechanism via a transmission mechanism, characterized in that said transmission mechanism comprises a shaft (25) provided with an actuating lever (26) coupled to said bolt and two operating arms (30, 31) respectively coupled to said motor and to a rack (37) capable of being driven by said bit, in that a clutch mechanism (35) is interposed between the motor shaft and one of the operating arms and in that a clutch release member (40) is movably mounted between said clutch mechanism (35) and said bit mechanism (15), a part of said clutch release member cooperating with said bit on a portion thereof correspondent substantially at its engagement stroke with said rack to maintain said clutch in the disengaged position when said bit is in position to effectively drive said rack. 2- Lock according to claim 1, characterized in that said bolt (12) is slidably mounted, along a rectilinear path, in a guide block (13) and in that said guide block is installed between the bit mechanism,   on the one hand, and said engine and its clutch mechanism, on the other hand.   3- Lock according to claim 2, characterized in that said shaft (25) passes through said guide block (13) and is guided in rotation therein, in that said actuation lever (26) is housed in said guide block and in that the two operating arms (30, 31) are fixed to the ends of said shaft   perpendicular thereto, on either side of said guide block.   4- Lock according to one of the preceding claims, characterized in that   that said actuating lever (26) is a rod fixed to the shaft (25) perpendicular thereto and coupled to said bolt, for example by being   engaged in a recess of it.   5- Lock according to claim 4, characterized in that said recess (27) comprises a bracing arch (68) on which bears the end of said rod in the position that the latter   occupies when said bolt (12) is extended as far as possible from said guide block.   6- Lock according to one of the preceding claims, characterized in that   that said clutch mechanism (35) comprises a disc (47) coaxial with the shaft (14a) of said engine, mounted with the possibility of sliding relative to this drive shaft, in that a finger (52) is worn by this disc and oriented parallel to its axis of rotation, in that said finger is engaged in a cutout of the neighboring operating arm (30) and in that rotationally fastening means (55, 56) are arranged between said shaft motor and said disc and urged to cooperate by a spring (50) pushing said disc towards said bolt.   7- Lock according to one of claims 2 to 6, characterized in that   said disengaging fork element (40) is a slide guided in translation parallel to the direction of the axis of rotation of said motor and extending on either side of said guide block (13) to cooperate with said   clutch mechanism (35) and with said bit (16).   8- Lock according to all of claims 6 and 7, characterized in that   that one end of said slide is engaged in an annular groove (59) formed at the periphery of said disc, so that said slide can   actuate said clutch mechanism.   9- Lock according to claim 8, characterized in that the other end of said slide forms or comprises a stop (44) extending transversely to its direction of movement, in the vicinity of a part of the path (16a) of said bit.   10- Lock according to one of the preceding claims, characterized in   that said rack (37) is integral with a movable assembly (63) slidably mounted parallel to the direction of movement of said bolt and coupled to the neighboring operating arm (31).   11- Lock according to all of claims 2 and 10, characterized in   that said moving element (63) is mounted along said guide block (13).   12- Lock according to one of the preceding claims, characterized in   that said bit mechanism comprises a locking block with   key control, driving said bit.