EP1030011B1 - Clutch device for a lock exterior handle and its movable bolt - Google Patents

Abstract

Two rings (2b) are placed in same casing (1) and are drilled with square hole (10) receiving internal and external rods. Two rings are coupled with ball (3) placed in slot (13) in casing. Externally controlled magnetic system (4) moves ball within cell (12), shared between rings, and lock them together.

Description

The invention relates to a device making it possible to completely protect a door lock from vandalism, and more specifically relates to a device for clutching an outside stand with its movable bolt.

In conventional locks, the outside stand and the bolt are directly connected, also, to limit acts of vandalism, we have imagined and implemented systems that condemn the stand by blocking it. But that does not prevent that one can force it and destroy it.

A device making it possible to separate the outside stand from the lock bolt, and thus to condemn access to a room to any person who does not have an appropriate badge, is known from document FR-A-2 552 809.

This known device comprises two crutches pivoting about the same axis, which can be engaged by a magnetic system, one of which is in direct contact with the bolt.

The object of the present invention is to provide a simple and reliable device for clutching an external lock handle with its bolt.

This object is achieved by a device for clutching an external lock stand according to claim 1.

According to an advantageous characteristic of the invention, the magnetic system consists of a movable frame carrying a lug disposed at the base of the housing and capable of moving the ball towards the cell, the movable frame enveloping a fixed electromagnet whose movable core is anchored to the base of the frame.

According to another particular characteristic of the invention, the optional additional protection means consists of a rotating pad mounted opposite the key cylinder and locked by a locking pin linked to the movement of the movable frame.

• Figure 1, une vue en coupe verticale du boîtier renfermant le mécanisme,
• Figure 2, une vue en coupe selon II-II de la figure 1,
• Figure 3, une vue du dessus selon III-III de la figure 2,
• Figure 4 et 5, des vues analogues aux figures 1 et 2 montrant le mécanisme en position activée.
• Figure 6, une vue analogue à la figure 1 montrant le mécanisme avec son moyen optionnel de protection de la serrure.
• Figure 7, une vue en coupe selon VII-VII de la figure 6.
• Figure 8, une vue analogue à la figure 7 montrant le mécanisme en position activée.

Other characteristics and advantages of the invention will emerge from the description which follows from the following description of nonlimiting exemplary embodiments in which reference will be made to the appended drawings which represent:

• FIG. 1, a view in vertical section of the box containing the mechanism,
• FIG. 2, a sectional view along II-II of FIG. 1,
• FIG. 3, a top view along III-III of FIG. 2,
• Figure 4 and 5, views similar to Figures 1 and 2 showing the mechanism in the activated position.
• Figure 6, a view similar to Figure 1 showing the mechanism with its optional means of protecting the lock.
• Figure 7, a sectional view along VII-VII of Figure 6.
• Figure 8, a view similar to Figure 7 showing the mechanism in the activated position.

Figures 1 to 3 show the stand clutch device in the rest position for which the outside stand is uncoupled from the lock bolt.

The entire mechanism is included in a housing 1 in two parts joined together by a set of screws 11. At the upper part of the housing, there are two crowns 2a and 2b mounted coaxially and each pierced with a nut 10 intended for receive on the outside side a stand not shown, and on the other side an inside stand in direct contact with the movable bolt. The two crowns pivot relative to each other by means of friction washers 7, and they are hollowed out at their base from a common cell 12 directly above a housing 13 provided in the housing 1, serving as a receptacle for a ball 3. Inside the housing, under the crowns, is disposed a movable frame 4 the upper face of which carries a lug 14 which can penetrate the base of the housing 13 and move the ball 3. The frame 4 of antimagnetic material envelops a fixed electromagnet 6 and its movable core 5 anchored on the base of the frame. Lights 8 are provided in the housing for the output of the supply wires.

Installed in a vertical position in a lock, the system will be controlled by any electronic access control process such as a magnetic card, a transponder, a radio or infrared control, etc.

In the rest position, the ball 3 by its own weight rests at the bottom of the housing 13; the two rings 2a and 2b are therefore separated from one another and free to rotate. Weighing on the "crazy" outside stand therefore has no effect. On the other hand, from the inside, the interior stand being in permanent engagement with the bolt will trigger its recoil movement and will release the door.

When an electrical excitation is supplied to the electromagnet 6 by means of a control system mentioned above, the core 5 is moved upwards and carries with it the frame 4 (FIGS. 4 and 5). The lug 14 then raises the ball 3 which is positioned in the cell 12 common to the crowns (2a, 2b). Throughout the duration of the excitation of the solenoid coil 6, the ball will be held in the high position. Being made of high strength steel, the ball thus secures the two crowns (2a, 2b) while resisting shear forces. As a result, the "crazy" outside handle is connected with the bolt of the lock, which allows the door to be opened from the outside.

At the end of excitation of the coil, the movable core 5 falls by its own weight with the frame 4 which is associated with it. The ball 3 released by the lug 14 may fall back in the housing 13 as soon as the crutches have returned to their rest position. The two crowns are again uncoupled.

The crutch clutch device described above is advantageously combined with an optional lockable protective nose as seen in FIGS. 6 and 7.

Below the housing 1 and in front of the key cylinder, is mounted a pellet 15 capable of turning on its axis inside its housing 16. The pellet is hollowed out at its upper part with a notch 17 located just below a locking lug 18. The latter is mounted at the end of a rod 19 extending the movable frame 4 downwards.

In the position shown in Figure 7, which corresponds to the rest position of the crutch clutch device of Figure 1, the frame 4 is in the low position and therefore the lug 18 at the end of the rod 19 is engaged in the notch 17 of the patch 15, blocking the rotation of the latter. The key can be inserted into the slot 20 of the tablet, but it cannot therefore be turned.

When the user wants to access the premises and uses his control system, to excite the electromagnet 6, he causes the crutch and the bolt to engage, as indicated previously with reference to FIGS. 4 and 5. The rise of the frame 4 causes that of the rod 19 and thus the locking pin 18 escapes the notch 17 of the pad 15 which becomes free to rotate again, as can be seen in FIG. 8. Thus the person having a key can actuate the lock.

This combined device for locking both the stand clutch and access to the lock cylinder therefore provides double security against vandalism.

Claims (4)

1. A clutch device for engaging an exterior lever handle for a lock with a movable lock bolt, comprising, in the same casing (1), two rings (2a, 2b) mounted coaxially and each pierced with a follower (10), one of the followers receiving, on one side of the rings, an exterior lever handle and the other follower receiving, on the other side of the rings, an interior lever handle in direct engagement with a movable lock bolt, a mechanism for coupling the rings being actuated by a magnetic system controlled from the outside, the two rings (2a, 2b) being hollowed out at their base with a common cavity (12) vertically aligned with a housing (13) made in the casing (1), the mechanism actuated by the magnetic system consisting of a ball (3) which rests under its own weight in the bottom of the said housing provided in the casing, the said ball being able to move upwards, by virtue of the action of the magnetic system (4, 5, 6) and position itself in the cavity (12) common to the two rings (2a, 2b) to secure them together, and optionally comprising additional means (15, 18) for protecting the lock, connected directly to the mechanism for coupling the two rings.
2. A clutch engagement device according to claim 1, characterized in that the magnetic system consists of a moving frame (4) bearing a stud (14) arranged at the base of the housing (13) and able to move the ball (3) towards the cavity (12), the moving frame surrounding a fixed electromagnet (6) the moving core plunger (5) of which is anchored to the base of the frame.
3. A clutch engagement device according to claims 1 and 2, characterized in that the optional additional protecting means consists of a rotary disc (15) mounted facing the key cylinder and blocked by a locking stud (18) associated with the movement of the moving frame (4).
4. A clutch engagement device according to claim 3, characterized in that the locking stud (18) is mounted at the end of a rod (19) extending the moving frame (4) and enters a cutout (17) of the disc (15).