FR2678017A1 - Slaved device for barring and unbarring doors - Google Patents

Abstract

The present invention relates to the field of the protection of safety enclosures, and it relates more particularly to the locking and unlocking of doorlock mechanisms, via a motorised bolt mechanism which is slaved via management electronics, particularly those of strongboxes, doors of strongrooms, doors or automatic ticket-dispensers, and other enclosures to be protected. This device also finds its application in the systems for controlling access to buildings or premises which are monitored (under surveillance), for which the doors are to be equipped with unlocking systems.

Description

 The present invention relates to the field of protection of security enclosures and it relates, more particularly, to the locking and unlocking of door locks, in particular those of safes, vaults, automatic teller machines, or other protected enclosure.

 At present, the generalization of equipment for opening retarders or time locks with opening retarders is effective.

 These systems have been purely mechanical in the past, and over the past few years have given way to electro-mechanical, or even electronic, systems.

 Various systems have thus used mechanisms with impulse or permanent electromagnets. Others have operated a small electric motor.

 In the latter case, random operating cases have been observed. The electromagnets do not offer any guarantee of operation, in particular in view of their consumption, especially in operation on batteries or on back-up batteries, in the event of a power failure, voluntary or not.

These various observations led us to the study, the realization and the development of a controlled motorized mechanism, which can be coupled to various electronic systems.
The description which follows, the invention is explained with the aid of an example which specifically relates to a safe.

 However, this example is by no means limiting. The invention can be applied whenever it is a question of controlling the opening and closing of a door of a security enclosure.

 The figurel represents, seen from above, the details of the mechanical part.

 Figure 3 shows in. section following A-A mechanical details.

 Figure 4 shows in section along B-B the mechanical details.

 Figure 5 shows in section along C-C the mechanical details.

 Figure 2 shows the rod (13).

 Figure 6 shows the electronic part of the motor-lock.

 In Figure 1, the lower body appears, seen from above, where there are the three mechanical fixing lugs (2) of the motor-lock inside the trunk.

 In (1), the two vertical spacers for screwing the upper cover, in (12), by two M4 screws. These two screws are drilled at their head, to allow a cable to pass through them, the two ends of which can be cold crimped with lead bearing a badge, serving as the manufacturer 's guarantee.

 In (20), 3 inserts where the electronic printed circuit is fixed.

 In (4), the drive micro-motor. This is equipped with a gear ratio of 1/243 turns and a consumption of less than 25 mA. This motor is screwed together on the motor support (9), by two screws (10). To ensure that the screws are locked, the threads of the gear motor have been treated with thread locker beforehand.

 A cam (5) is mounted on the axis of the gear motor. This is machined from two diametrically opposite slots or slots (19), intended for the light barrier.

 This cam has a crimped tenon (6), perpendicular to the two lights. On the post is stamped a plastic ring, ensuring a good coefficient of friction on the slide (7) that the motor must drive.

 The slide (7) is made of aluminum of the "AU 4G" type treated on the surface by anodization in black.

 This slide has a crimped rod (8), used to actuate a microswitch (23).

 In its front face, under a shoulder, is housed a return spring (22) resting around a stud stamped with the press (24).

 In (21), a folded lug makes it possible to consolidate the connection cord to the electronics for managing the motor-lock.

 In Figure 2, a machined rod (13) slides in the lock. Its position is determined by the notch (15).

 The rod operating stops are determined by the two shoulders, noted (15), when opening, and (18) when closing. The notch (16) receives the slide in the closed position. The shoulder (17) is used to actuate the microswitch (25), determining "think closed" or "think open".

 Figure 6 shows the printed circuit of the motor-lock. This is fixed by three screws (20) on the inserts of the motor-lock. In (1) appear two through holes for the cover fixing spacers.

 I1 supports two micro-switches: (23) and (25), a connector for the connection cord (6), the connection points (+ and -) of the motor (7), those of an external micro-switch ( 8), and a set of electronic components in (9), (10), (2) and (3).

 The microswitch (23) is closed only when the slide is in the closed position.

As for the operation of the motor-lock, it takes place as follows:
For any electronic time lock, with or without microprocessor, or microcontroller, or opening retarder, and when the entire initial process has taken place, the motor-lock is tele-unlocked.

 The management electronics, via the connection cord, sends a DC voltage polarity to the connector (6). The tracks of the printed circuit convey this voltage on the connection terminals (7) from which two colored wires leave towards the motor terminals. It starts to turn in the desired direction.

 In parallel, the tracks of the printed circuit supply the assembly (9) and (10). In (9) is a ceramic anti-interference capacitor of the motor In (10), a set of 4 diodes has the role of rectifying the voltage supplying the motor, whatever its polarity. A capacitor once again filters out any interference, and an electrochemical or tantalum capacitor integrates the rectified voltage and whose role is more particularly to maintain a positive voltage a few hundredths of a second, after the engine has stopped.

This voltage thus obtained supplies a photo-emitting diode (3) in the infrared wavelength, using a resistor (4) of
current limitation, in series with it.

 This emitting diode radiates on a photo-transistor (2), placed in its axis, operating on the same wavelength as the diode.

 This light field is cut by the cam (5). By the rotation of the motor, this cam rotates, and makes one of the two machined slots (19) pass through the light field, which it comprises. As a result, the light beam can reach the photo transistor, which returns the change of state to the management electronics, which in turn stops the engine.

 Despite the large gear reduction, the engine is electrically braked, in the sense that the management electronics send the motor a short pulse in reverse polarity due to the previous operation, which guarantees a clean stop. With the engine stopped, the capacitor ends up discharging in the emitting diode, to extinguish after a few hundredths of a second.

 This movement thus described of the motor will have made it possible to move the slide (7) backwards, in the "open" position, by virtue of the tenon (6) of the cam (5), which has come to push it.

 Therefore, you can introduce the key, turn it, the rod (13) released from its blocking, mechanically connected to the linkage of the door opening mechanism, can slide freely.

 The latter thus moved, actuates the micro-switch (25) and the management electronics is informed of the opening of the pens.

 For safety reasons, in the event of a power failure, the management electronics restart the motor in the opposite direction, which advances the slide. It will collide with the rod, which bars its passage, and therefore remains under pressure against it, by the pressure of the spring.

 The motor continues to run until the slot (19) of the cam allows the photo-diode to illuminate the photo-transistor, which will stop the motor, obviously with a reverse voltage pulse. , for electric braking, as for opening.

 As soon as the trunk door is closed, and therefore also thinks, this movement of the trunk linkage will activate the return of the motor-lock rod in the closed position. This movement will release the microswitch which will signal1, closed thoughts ", by the micro-switch (25), in series with an external micro-switch (or ILS tab) placed on the rebate, and thus indicating:" closed thoughts "and" door closed "to management electronics.

 This same rod movement in the closed position, now allows the slide to be housed in the notch (16) of the rod, under the action of the return spring (22).

 The blocking position of the slide causes the action of the pin (8) at the rear of the slide on the second microswitch (23), which confirms the correct positioning of the slide in the housing of the rod, therefore of the guarantee of blocking it.

When the system is first powered up, drunk during power up, after an after-sales service, this latter micro-switch finds all its meaning and interest, since it is thanks to it that can be defines and differentiates the opening and closing position of the
slide, without having to use an additional signal.

Claims (10)

 1) The present invention relates to the locking and unlocking of the door lock mechanisms, by means of a motor lock mechanism controlled by electronic management, characterized in that it comprises in a sheet metal housing steel (12), capped with a cover, a motorized mechanism, comprising a motor (4), fixed on a support (9), actuating a cam (5), provided with a lug (6), covered with a plastic ring, driving a slide (7), blocker (13) which is connected to the mechanism of a door by one of the fixing holes (14), the slide has a rod (8) operating a switch (23), the assembly controlled by an electronic circuit board supporting a connection connector (6), two connection points (7) for the rebate switch, the rod switch (23), The rod switch (25), a photo-transistor (2), a transmitting photodiode (3), a current limiting resistor (4 ), a rectification cell (10) composed of 4 diodes, a filtering capacitor and an integration capacitor, a motor anti-interference capacitor (9), and 2 motor connection points (11 ).  2) Device according to claim I characterized in that this motor lock locks the mechanism of the linkage of the different doors, thus preventing any unauthorized opening.  3) Device according to claim 1 characterized in that the door mechanism is connected to a rod (13), mechanically connected to the door mechanism by one of the three fixing holes (14), sliding in the motor-lock.  4) Device according to claim 1 characterized in that this rod is blocked or released by the movement of a slide (7).  5) Device according to claim 1 characterized in that this slide moved by the tenon (6) capped with a plastic ring taken on a circuiaire cam (5), fixedly attached to the axis of a geared micro-motor ( 4), itself mounted on a support (9).  6) Device according to claim 1 characterized in that the motor is controlled by management electronics, and controlled in its rotational movements, by a light barrier, in infrared, composed of a photo-emitting diode (3) , and a photo transistor (2), which determines the angular displacement of the motor cam (5).  7) Device according to claim 1 characterized in that the motor rotations, in opening or closing, are differentiated by a micro-switch (23), which is actuated by the rod (8) in the closing movement. This rod is used to energize the system, as well as to check the correct locking of the slide (7) in the notch (16) of the rod (13).  8) Device according to claim 1 characterized in that the rod (13) is mechanically limited in its movement by two shoulders serving as stops, opening (18) and closing (15).  9) Device according to claim 1 characterized in that the motor is actuated by a direct current source of a polarity defining its direction of rotation. A motor interference filtering capacitor (9) wired to its terminals supplies a rectifier cell by diode bridge, two filtering and integration capacitors (10), supplying electrical energy to the light emitting diode (3) by its current limiting resistor (4), this, during the engine rotation time, This solution reduces the number of wires to be connected to the motor lock.  10) Device according to claim 1 characterized in that the motor (4) is greatly reduced, guaranteeing a low speed of rotation, therefore a higher motor torque, reducing the angular inertia thereof when the engine stops, . This low residual inertia being completely eliminated by electric braking of the motor, in the sense that a reverse voltage is applied to it for a short period. This type of motor management makes it possible to effectively control its position, whatever the movement and its desired position.