FR2583093A1 - DEVICE FOR CONTROLLING A DOOR LOCKING MECHANISM - Google Patents

Abstract

THE CONTROL DEVICE OF A DOOR LOCKING MECHANISM ACCORDING TO THE INVENTION INCLUDES TWO CONTROL UNITS 1, 2 PROVIDED ON EACH OTHER OF THE DOOR AND MEANS 6-9 FOR CONNECTING THE CONTROL UNITS TO THE LOCKING MECHANISM 21, IT IS CHARACTERIZED IN THAT IT INCLUDES RELEASABLE MEANS 7, 8 TO CONNECT THE CONTROLS 1, 2 BETWEEN THEM.

Description

The present invention relates to a device for controlling a

  door lock, especially for

a door from a Faraday cage.

  Door locking mechanisms are known which can only be controlled from the outside by authorized persons provided with a key or a magnetic card, and which comprise on the inside of the door a security handle allowing any nobody

  locked in the enclosure closed by the door to leave freely.

  In order to allow the door to be unlocked, either from the outside or from the inside, the door locking mechanism generally comprises separate control means acting on the locking mechanism independently of one another. This independence involves relatively complex mechanisms. In addition, to meet the space constraints, the independent control mechanisms are produced by means of small parts which are therefore liable to break after prolonged use or under conditions

  of use involving high constraints.

  In certain applications, in particular when the door is intended to close an enclosure for military use, the constraints

  mentioned above are incompatible with the functional requirements-

  ment. Locking mechanisms are also known in which two handles arranged on either side of the door are

  rigidly connected together and used to operate the mechanism.

  These structures are solid but if one of the handles is blocked,

  the other is also, so there is no possibility of a

  security rusting An object of the present invention is to provide a device for controlling a door locking mechanism which is of simple and resistant structure while ensuring the functions of selective unlocking from outside the door and unlocking in all

  circumstances from inside the door.

  Another object of the present invention is to provide a device for controlling a door unlocking mechanism which is particularly suitable for controlling a door closing a door.

Faraday cage.

  In order to achieve these goals, there is provided according to the invention a control device for a door locking mechanism comprising two control members arranged on either side of the door and means for connecting control to the locking mechanism characterized in that it comprises disengageable means for connecting the control members to one another. Thus, when the external control member is blocked, the unlocking of the mechanism continues to be ensured from the inside by acting on the disengageable means for

  disconnect the control elements.

  According to an advantageous version of the invention, the disengageable means comprise an intermediate sleeve crossed by control rods integral with the control members, one of the control rods being movable

  in translation along the axis of the intermediate sleeve.

  Thus, when the external control member is blocked, the other control member is detached from the member

  blocked by moving the movable control rod in transla-

  tion until it is detached from the intermediate sleeve. According to a preferred embodiment of the invention, the control device comprises means for retaining the disengageable means in the engaged position. Thus, when the door is closed, the control members remain properly connected to each other and can be operated

  on either side of the door.

  According to another aspect of the invention, more particularly

  intended for a door closing a Faraday cage, the intermediate sleeve has two metal sleeve parts separated by an electrically insulating body

  ensuring a mechanical connection between the sleeve parts.

  Thus, the mechanical resistance of the assembly is ensured by the metal sleeve parts while the electrically insulating body avoids an antenna effect between

the control elements.

  According to an advantageous version of this aspect of the invention, the electrically insulating body has a polygonal section and cooperates with housings of corresponding section made in the sleeve parts. Thus, the mechanical connection between the metal sleeve parts is ensured by simple fitting of the insulating body between

the sleeve parts.

  According to an embodiment particularly suitable for a door having two spaced walls, the intermediate sleeve is surrounded by an insulating housing fixed to each of the walls. Thus, the insulating box is used as an additional spacer between the walls

  of the door at the locking mechanism all -

  maintaining electrical insulation between these walls.

  Other features and advantages of the invention

  tion will result from the following description of a

  nonlimiting example with reference to the accompanying drawings

among which: -

  - Figure 1 is a partial sectional view

  of the control device according to the invention in a position

  tion o the control members are integral, - Figure 2 is a sectional view similar to that of Figure 1 in which one of the control members is blocked and the other control member is disconnected, - Figure 3 is a front view of an embodiment of retaining key, - Figure 4 is a sectional view along the plane

IV-IV of figure 1.

  With reference to the figures, the control device according to the invention comprises two control members 1, 2 formed by handles arranged on either side of a door generally designated at 3 and comprising two walls 4, 5 spaced apart. the other. The control handles 1, 2 are interconnected by disengageable means comprising a control rod 6 secured to the control handle i and a control rod 7 secured to the control handle 2, connected to each other by an intermediate sleeve generally designated at 8 and comprising a metal sleeve part 8.1 associated with the control rod 6 and a metal sleeve part 8.2 associated with the control rod 7, the sleeve parts 8.1 and 8.2 being themselves mechanically connected to one another the other by an electrically insulating body 9. In order to allow the sleeve parts to be driven by

  the respective control rods, each control rod- -

  has a square section end engaging a square opening 10 in the corresponding sleeve part (Figure 4). Likewise, in order to ensure a mechanical connection between the sleeve parts, the electrically insulating body 9 preferably has a polygonal section, for example a square section and cooperates with housings 11 of corresponding section made in the sleeve parts 8.1, 8.2. In order to ensure better cohesion of the assembly, the insulating body 9 is preferably

  fixed to the sleeve part 8.1 by screws 12.

  The intermediate sleeve 8 is surrounded by an insulating housing 13 having one end fixed to the wall 4 by bolts 14 whose head is supported on an external plywood 15 and the other end of the insulating housing 13 is fixed to a plywood 16, it - even fixed to the wall 5 by rivets 17, by means of screws 18 engaging in tapped holes of a crown 19 bearing on an external rim 20 of the insulating housing 13. The control rod 7 associated with the handle 2 also passes through a locking mechanism

  21, for example a cremone bolt comprising bars of ver-

  rusting 22. The locking mechanism has a structure known per se and it is useless to give one

  detailed description. The locking mechanism 21

  is fixed by appropriate means (not shown) to the counterplate 16. The control rod 7 is movable in translation along the axis of the intermediate sleeve 8 and its position is determined by pulling or pushing the control member 2. In order that the control rod 7 is normally retained inserted into the opening 10 of the part of the sleeve 8.2, this control rod 7 comprises a flange 23 extending in a socket 24 fixed to the locking mechanism 21. An annular groove 25 is made in the flange 23 and a key 26 in the shape of a U (Figure 3) has its wings 27 engaged transversely in the sleeve 24 and extending in the groove 25 on either side of the axis of the control rod 7. The key 26 is itself held in place by a pin 28 engaged in a hole 29 in the key 26 and held by a projection

integral with the socket 24.

  The end of the control rod 7 opposite to that which is engaged in the sleeve part 8.2 comprises a square section head 31 on which is engaged the control handle 2 held in place by a washer 32 and a screw 33; At its end opposite to the control rod 6, the control handle 1 has a spout 34 pierced with an opening 35 opposite an opening 36 formed in a projection 37 secured to the wall 4 of the door 3,

  for locked position of the door.

  The operation of the device according to the invention is as follows: in the normal operating position, illustrated by FIG. 1, the control rod 7 is pressed into the opening 10 of the sleeve part 8.2 and the control handles I and 2 are connected to each other by the intermediate sleeve 8 enclosing the body 9. In this position, a force exerted on one or the other of the control handles 1 and 2 causes the locking mechanism 21 to operate. When closing the door from the inside, traction is exerted on the control handle 2 to maintain the

  door closed during locking. When this trac-

  tion is exerted, the control rod 7 is retained engaged in the opening 10 of the sleeve portion 8.2 by the key 26 engaged in the groove 25 of the flange

23.

  In the position illustrated in FIG. 2, the control handle is locked by a padlock 38, and in the case where a person has inadvertently been locked inside an enclosure delimited by the door 3, it is necessary that this no one can

  actuate the locking mechanism 21 to free itself.

  However, in the initial position, the control handle 2 is also blocked due to its solidarity with

the control handle 1.

  To allow the operation of the locking mechanism 21, the control handle 2 must therefore be detached from the control handle 1. For this, the pin 28 is torn off and the key 26 is removed from its housing, which releases the flange 23 and allows an axial displacement of the control rod 7, as illustrated by the arrows in FIG. 2. During its displacement in translation, the control rod 7 leaves the housing in the sleeve part 8.2, but nevertheless continues

  to extend through the locking mechanism-21.

  Being released from the sleeve part 8.2, the control rod 7 can be freely maneuvered by means of

  the control handle 2 to open the door.

  In the two illustrated operating positions, it can be seen that the body 9 and the insulating box 13 provide electrical insulation between the two walls 4 and 5 of the door 3, so that no antenna effect exists between the handles. 1 and 2 and, if the door is part of a faraday cage, the insulation

  of internal volume against penetration of electro- waves

  magnetic is suitably insured.

  Of course, the invention is not limited to the embodiments described above and can be brought to it

execution variants.

  In particular, the control rods 7 and 9 of square section can be replaced by rods generally having a polygonal section, or even a circular section with drive pins cooperating with grooves in the sleeve parts

8.1 and 8.2.

Claims (10)

  1. Device for controlling a ver-   door rust comprising two control members (1, 2) arranged on either side of the door (3) and means (6-9) for connecting the control members to the locking mechanism (21), characterized in what it includes disengageable means (7, 8) for connecting between them the control members (1, 2).   2.Lock mechanism control device   door strip according to claim 1, characterized in that the disengageable means comprise an intermediate sleeve (8) traversed by control rods (6, 7) integral with the control members (1, 2), one (7 ) control rods being movable in translation   along the axis of the intermediate sleeve (8).   3. Device for controlling a locking mechanism   door strip according to claim 1 or to resale   dication 2, characterized in that it includes means   retaining (26) disengageable means in the engaged position.   4. Device for controlling a locking mechanism   door strip according to claim 3, taken in connection with claim 2, characterized in that the retaining means take a socket (24) integral with the door surrounding a portion (23) of the control rod (7) movable in translation, and a key (26) passing through the sleeve (24) and extending in a   groove (25) formed in the portion (23) of the connecting rod mande (7) surrounded by the socket.   5. Device for controlling a locking mechanism   door lage according to claim 4, characterized in that the groove (25) is annular and in that the key (26) has a U shape.   6. Device for controlling a locking mechanism   door strip according to claim 4 or to resale   dication 5, characterized in that it comprises a pin (28) carried by a projection (30) of the sleeve (24) and passing through the key (26) to hold the latter in place.   7. Device for controlling a locking mechanism   door strip according to one of claims 1 to   6, characterized in that the intermediate sleeve (8) comprises two metal sleeve parts (8.1, 8.2) separated by an electrically insulating body (9) ensuring a mechanical connection between the sleeve parts (8.1, 1O 8.2).   8. Device for controlling a locking mechanism   door according to claim 7, characterized in that the electrically insulating body (9) has a polygonal section which cooperates with housings (11) of corresponding section made in the parts of sleeves (8.1, 8.2).   9. Device for controlling a locking mechanism   door strip according to claim 7 or to resale   dication 8, characterized in that the intermediate sleeve   (8) is surrounded by an insulating box (13).   10. Control device for a door locking mechanism according to claim 9 disposed in a door (3) having two walls (4, 5) spaced apart, characterized in that the insulating housing (13) is fixed to each of the walls (4, 5).