FR2728612A1 - LOCKING AND KEY CONTROL DEVICE - Google Patents

Abstract

The box (1), designed (16) for flush panel mounting, carries a standard cylinder (2) accepting the key to be secured, whose rotation turns a key-bit in a horizontal slot (13) in a sleeve (12). The sleeve end (5) operates (6) rotary indication contacts (4). A solenoid (7) operated plunger (8), penetrating a hole (9) in the box top and entering recesses (10,11) in the sleeve, defines two sleeve positions 90 deg. apart. In one, the key is trapped. To free it for use, the authorised user satisfies e.g. a card or key-pad check. The plunger then rises, the key is rotated and withdrawn. All operations are centrally monitored, using signals from the rotary (4) and solenoid (21) contacts.

Description

The present invention relates to the security of living quarters or

  professional premises, for example commercial

  or an object locking device such as a key or similar object, in order to control its use.

  The protection of premises, especially industrial premises, is generally ensured by limiting access to all or part of the premises, for example by equipping the openings with appropriate locks. However, the persons authorized to enter the premises must be able to have keys and it is then necessary to make at least as many keys as there are persons authorized to enter the premises. A solution to limit the number of keys giving access

  protected premises may consist of using magnetic cards, each user having a card containing

  both a code controlling access to certain premises selectively. this solution can not be suitable for premises already equipped with conventional locks, unless they are replaced or

  complete them with card readers, or specially adapted coded keyboards.

  Another solution is to put a temporary key-

  available to an authorized user, using

  a device of the type described in the French patent application

  94.03580, according to which each key is provided with identification means and is placed on a specific support for each key, inside a protective housing. Thus, each user has a key (for example a simple password) that allows him only to access the box, which contains several keys specifically giving access to certain premises; he can not withdraw either of these

  specific keys only in a controlled way, and he can only

  the premises only after replacing the specific key

and picked up the first key.

  The present invention relates to a device

  adaptable in an installation of the type

  above or supplement it to improve performance.

  More specifically, the subject of the invention is an object locking device, in particular a lock key,

  to control its use.

  The object of the invention is also an object locking and control device, easily adaptable to existing systems for securing and controlling access to

various premises.

  The object locking and control device according to the present invention is of the type comprising a cylinder movable by rotation on its axis, receiving the object and being able to pivot from at least one free position to at least one position

  locked, and is distinguished in that it comprises, in combination

  naison: - said cylinder receiving the object, carrying a bit having a branch protruding from the cylinder, pivotable at a given rotation angle;

  - a cylindrical piece of revolution, mounted pivotally

  aunt following the same axis of rotation as the bit,

  both a slot receiving the end of the bit opposite the pivot axis, and at least one stop limiting the angle of rotation; - a contactor for locating the position

angular of the cylindrical piece.

  According to a preferred embodiment of the invention, the device is completed by an electromagnet acting on a rod sliding in a fixed direction and engaging in at least one hole provided in the cylindrical part of revolution. It is possible to provide a single hole, for example corresponding to the locking position

  of the key, or to provide two, spaced from a corre-

  the angular displacement of the key to move from the

  free position at the lock position.

  The rod of the electromagnet can thus occupy two positions, a high position and a low position. In the low position, the rod is engaged in the hole or holes provided in the cylindrical piece and prevents any rotation thereof. The electromagnet is adjusted so that the rod

  engages in the hole or holes when they are in correspondence

  dance. The release of the stem, causing the release of the

  cylinder, can be controlled remotely by acting on the electromagnet. Advantageously, a contactor is connected to the electromagnet to detect the position of the rod and to supplement the information transmitted by the contactor locating the angular position of the cylindrical part.

  The cylindrical pivoting piece may comprise a wall having a cutout whose edges form stops limiting the angle of rotation while bearing against the cylinder receiving the object. The arc corresponding to this cut is substantially equal to the angle of rotation between the free position of the locked position. The slot provided in the wall of the cylindrical piece of revolution is of a width substantially equal to or slightly greater than the thickness of the bit, while its depth is greater than the width of the blade, so that it is engaged more or less deeply in the slot, according to his position. The slot is thus adapted to receive bobs mounted on cylinders of variable length, the variation in length corresponding substantially to the

depth of the slot.

  The device of the invention is particularly advantageous in that it makes it possible to supplement existing systems.

  comprising the locks which retain the cylinder, preferably the European standard, the length of which can vary within certain limits. Thus, for example, it is possible to use the device of the invention with cylinders of length varying between about 28 and 35 mm, without

  that it is necessary to modify or adapt it.

  The device of the invention can thus be integrated into a control system for the use of one or more keys. The key reserved for an authorized user is in place in the cylinder, in the locked position, that is to say that it can not be extracted from the cylinder, otherwise in the

  rotating a certain angle. The user presents himself

  both in front of the device of the invention to remove the key (it may be for example the key opening access to a reserved room) must first identify by usual means, manual or automated, for that the electromagnet be

  activated and unblocks the cylindrical piece, thus allowing its rotation. After turning the key, it can be removed from the cylinder. The contactor then recorded the angular position and this information is communicated to a central monitoring station, or any system of recording or recording.

  registration, together with the identification of the user and the date of the transaction. When the authorized user puts the key back in place, the reverse operations are performed, and the switch registers the return of the key to the lock position, and communicates

  this information to the central monitoring station, or to the recording or registration system, together with the date of this second operation. The features and advantages of the present invention will appear in more detail in the following description.

  relating to a preferred and nonlimiting embodiment, with reference to the appended drawings, which represent: FIG. 1: an exploded perspective view showing the main elements of the device of the invention, offset

along their axis.

  Figure 2: a longitudinal sectional view, along the axis

  of rotation, of the device of Figure 1.

  Figure 3: a cross-sectional view along A-A of the

device of Figure 2.

  The locking and control device shown

  Figure 1 is particularly suitable for locking

  lock and check a lock key, in order to control

  the use of the key by authorized users.

  The device comprises a support block (1) in which is inserted the cylinder (2) of the lock, to the standard

  European, destined to receive the key.

  At the back of the block (1), is adapted a cylindrical piece

  drique of revolution (3) as well as a switch (4), the cylinder

  dre (2), the cylindrical part (3) and the contactor (4) being

arranged on the same axis.

  The cylindrical part of revolution (3) has on its rear part a sleeve (5) which fits on the axis (6)

  contactor drive (4). The pivoting of the cylindrical part (3) causes the rotation of the axis (6) of the contactor at a given angle, which makes it possible to raise the angular position, according to a conventional technique, for example

  by mechanical, electromechanical or magnetic contact. The indication of the angular position of the contactor axis can be processed by appropriate means such as a microcomputer (not shown).

  The locking and control device is completed by an electromagnet (7) acting on a moving rod (8).

  vertically, engaging in the through-hole (9) which passes through the block (1) into one or both of the two blind holes (10) and (11) provided in the wall of the cylindrical piece ( 3). Thus, the rod (8) of the electromagnet (7) can come block the cylindrical part (3) in one or other of the two positions. The wall of the cylindrical casing (12) of the cylindrical piece (3) comprises a slit (13) of elongate shape, of sufficient width to accommodate the bit integral with the cylinder (2) of the lock, shown in the following figures. This wall (12) is discontinuous and has a break on an arc of about 90 so as to form two opposite stops (14) and (15) which limit the angle of rotation of the cylindrical piece (3) while bearing

against the cylinder (2) key.

  The block (1) is preferably inserted into a fixed wall

  (not shown) which he remains inseparable. Both chan-

  brakes (16) formed in opposite corners of the front face of the

  block (1) enable the block to be inserted into a wall

  singing any possibility of extraction to the front, the part

  rear of the device being protected by the wall.

  Figure 2 shows a longitudinal section of the arrangement

  1 of the three elements constituted by the block (1) carrying the cylinder (2), the cylindrical part (3) and

  the contactor (4) are put in place and assembled.

  The bit (18) of the cylinder (2), seen at the end, is engaged in the housing constituted by the slot (13). As shown in Figure 2, the depth of the slot (13) is sufficient to accommodate bins occupying positions variable longitudinally, that is to say corresponding to cylinders (2) of variable length. Thus, in the case of the cylinder shown in FIG. 2, it is possible to use a cylinder of variable length, between approximately 28 and 35 mm. As shown in Figure 3, the cylinder (2) is locked in its position, in the block (1) by the groove (19) in which it is engaged, while the casing (12) of the

  cylindrical piece can rotate on its axis under the action of the angular displacement of the bit (18) which rotates with the key (20) engaged in the cylinder and pushes the cylindrical envelope

  drique (12) bearing on the edges of the slot (13) in which it is engaged. The angle of rotation is limited, as shown in Figure 3, by the stops (14) and (15) which bear against one or the other of the faces of the base

of the cylinder (2).

  Thus, if in the position of the key shown in FIG. 3, the key can be extracted from the cylinder (2), a rotation

  90 clockwise movement causes the abutment (14) to bear against the base of the cylinder (2), and this position corresponds to the locking of the key which can no longer be extracted from the cylinder. Moreover, in one or the other of the two extreme angular positions of the key, a pressure

  the key in the direction of the blockage has the effect of

  to push one or the other of the abutments (14) and (15) against the base of the cylinder (2) via the bit (18), but no excessive pressure is exerted on the contactor (4) which is the most fragile element, and therefore

  the indication of the position he gives is not distorted.

  In addition, the locking of the cylindrical piece (3) is completed by the rod (8) of the electromagnet (7), which engages, as shown in Figures 1 and 2, in the holes provided

on the cylindrical piece.

  Finally, when the key is in the locking position, the abutment (14) bearing against the base of the cylinder (2), the end of the rod (8) engages in the hole (10) provided on the sleeve (5), and this lower position of the rod (8) is detected by a contactor (21) connected to the electromagnet

  (7). This contactor provides additional information

  the position of the rod (8), and consequently the key locking position, which completes the information provided by the switch (6). The unlocking, to enable the key to be operated, is controlled remotely by acting on

  the electromagnet (7) for raising the rod (8).

  The engagement of the rod (8) in the second hole (11), when the key is in the other extreme position and the stop (15) is against the base of the cylinder (2), is effected by

the same way.

Claims (6)

  1. An object locking and control device such as a key or similar object, of the type comprising a cylinder movable by rotation on its axis, receiving the object and being able to pivot from at least one free position to at least one locked position , characterized in that it comprises, in combination: - said cylinder (2) receiving the object, carrying a bit (18) having a branch protruding from the cylinder, pivotable at a given rotation angle; - A cylindrical piece of revolution (3), pivotally mounted along the same axis of rotation as the bit (18), having a slot (13) receiving the end of the bit opposite the pivot axis, and at least one stop (14, 15) limiting the angle of rotation; - a contactor (4) for locating the position   angular of the cylindrical piece (3).   2. Device according to claim 1, characterized in that it further comprises an electromagnet (7) acting on a rod (8) sliding in a fixed direction and engaging in at least one hole (10, 11) provided in the room cylindrical of revolution (3).   3. Device according to claim 2, characterized in that the electromagnet (7) is connected to a contactor (21)   detecting the position of the rod of the electromagnet.   4. Device according to any one of the claims   1 and 2, characterized in that the cylindrical piece (3) pivoting comprises a wall (12) having a cutout whose edges form stops (14, 15) limiting the angle of rotation while bearing against the cylinder (2 ) receiving the object. 5. Device according to claim 4, characterized in that the arc corresponding to the cutout is substantially equal to the angle of rotation between the position free from the locked position.   6. Device according to any one of the claims   previous, characterized in that the depth of the slot (13) formed in the cylindrical part of revolution (3) is greater than the width of the bit (18), so that it is engaged more or less deeply in the slot, according to his position.