ES2218076T3 - FAILURE-LOCK UNDERSTANDING A SAFE LOCK HOOK LATCH. - Google Patents

Abstract

Failure-lock comprising a hook latch (1) (2) swivel mounted inside a box (3) between an unlocked position and a locked locked position, this latch (1) cooperating with a support (4) connected, in turn, with a breaker bar (5), through actuating means and locking means of the latch (1) in locked locked position that prevent its return to the unlocked position during a direct action on this latch (1), the actuation means allowing the rotation of the latch (1) from the translation of the support (4) actuated by the bar (5), and comprising gear means, characterized in that the actuating means comprise first and second gear means, the first means (7, 8) comprising a toothed sector (7) integral with the latch (1) and substantially centered with respect to the axis of rotation (X, X¿) of the latter, engaging this toothed sector (7 ) on the teeth of a cre rack (8) supportive of the support (4) to a position corresponding to a locking position of the latch (1), taking said second gear means (8, 9), integral, as well as the first, on the one hand with the latch (1), on the other hand with the support (4) then the relay of said first gear means, to continue the rotation of the latch to a locked locked position of the latch (1) in which the last tooth (12c ) of the toothed sector (7), released from the gear in the teeth (11b, 11c) of the rack (8), is in opposition to a tooth (11c) of the rack (8).

Description

False-lock that comprises a secure locking hook latch.

The present invention relates to a fail-lock comprising a hook mounted latch swivel inside a box between a position of unlocking and a locking position in which the latch is locked, meaning that your return to the unlocked position is prevented during a direct action on the end of the latch, according to the preamble of claim 1.

A fail-lock of this type is described in particular in French patent no. 2,587 752

Another fail-lock of this type is known from the document EP-A-0 679 786.

This patent FR-A-2 587 752 describes indeed a fail-lock in which the latch of hook cooperates with a support connected, in turn, with a bar failed, by means of actuation and by means of blocking the latch in locked position that prevents its return to a position of unlocking during a direct action on this latch, exercised, for example, during an attempted effraction. The drive means allow the rotation of the latch from the translation of the support operated by the bar.

The objective of the present invention is to propose a fail-lock that involves a latch locked in locked position through means improved compared to those of the prior art.

The invention thus relates to a latch of swivel mounted hook inside a box between a unlocked position and locked locked position, cooperating this latch with a support connected, in turn, with a  Demolition bar, through drive means and means of latch lock in a locked lock position that prevent its return to the unlocked position during an action direct on this latch, allowing the means of drive the rotation of the latch from the translation of the support operated by the bar, and comprising means of gear.

According to the invention, this fail-lock is characterized by the means actuators comprise first and second means of gear, the first means with a jagged sector integral with the latch and substantially centered with respect to the axis of rotation of the latter, engaging this toothed sector in the teeth of a supportive zipper of the support up to a position corresponding to a latch lock position, taking said second gear means, integral, like that the first, on the one hand with the latch, on the other hand with the then support the relay of said first gear means, to continue the rotation of the latch to a position of locked latch lock in which the last tooth of the toothed sector, released from the gear in the teeth of the zipper, is in opposition to a tooth of the zipper.

Preferred forms of the invention constitute the Subject of the dependent claims.

Thanks to the blocking means above mentioned, constituted by the drive means themselves, more precisely by the first gear means that behave, any return of the latch to the unlocking position, for example during an attempt to effraction when an effort is exerted on the end of the latch.

In a preferred embodiment, said second gear means comprise a button carried by the latch, this mobile button being during the translation of the support and the rotation of the latch between a position in which this button it is free with respect to the support and a position in which it is inserted in a notch provided on the support, relieving said first means gear to ensure the rotation of the latch to the locked position locked.

Other particularities and advantages of the invention they will also appear upon reading the description that follows.

In the attached designs, given as non-limiting examples:

- Figure 1 is a view of a fail-lock according to the invention in position unlocked

- Figure 2 is a view of a fail-lock according to the invention in position blocked up ;

- Figures 3, 4 and 5 illustrate, respectively, a position of the fail-lock that precedes the blocking position, the blocking position itself and a position corresponding to the unlocking principle.

In the embodiment of Figures 1 and 2, the fail-lock comprises a secondary box 3 inside which is rotatably mounted around an axis X - X 'a hook latch 1.

This latch 1 is movable between a position unlocking release (figure 1) and an exit position of blockage (figure 2) by the translation of the bar 5 that is shifts in the direction F 1, to the left in the figures, behind a guard 6, from a control mechanism located in the main lock-lock box. East mechanism can be controlled either by a key, or by a handle (not shown).

Bar 5 is in solidarity with a support 4.

Latch 1 has a toothed sector 7, substantially centered with respect to the axis of rotation X-X 'and comprising, in the embodiment example represented, three teeth 12a, 12b, 12c that engage in the teeth 11 a, 11b, 11c of a rack 8 integral with the support 4. Therefore, the translation of the support 4 controls through these first gear means, the rotation of the latch of hook 1.

Second gear means complement the toothed sector 7 and rack 8.

Thus, latch 1 carries a mobile button, during the translation of the support 4 and the rotation of the latch 1, between a position in which this button 9 is free with respect to the support 4 and a position in which it is inserted in a notch 10 provided in the support 4, relieving said first gear means 7, 8 for secure the rotation of latch 1 to the locked position blocked up.

More precisely, with reference to Figure 2, the button 9, which is inserted in the notch 10 provided in the support 4, rests against a rear edge 10b of said notch and is pushed in the F1 direction by this edge. It is observed that, in this position of button 9 which substantially corresponds to the end of the rotation of latch 1 relative to its axis X-X 'and, therefore, with respect to its locked position, the last tooth 11c of rack 8 and the last tooth 12c of the toothed sector 7 they are in opposition, preventing any rotation movement reverse of latch 1 during direct action on the end 2, in the direction of arrow F.

The notch 10 has a certain width in the direction of travel of the support greater than the section of the button 9, which allows a certain free run between the button 9 and support 4.

This notch 10, planned near the last tooth 11c of rack 8, has a leading edge 10a that directly extends the last tooth 11c of the rack 8 and a rear edge 10b, opposite this last tooth 11c, and against the which button 9 is supported in locked position. In the mode of represented embodiment, the rear edge 10b is constituted by a internal edge to the bias of the U4-shaped support.

Zip 8 can be made directly on the inner edge of the support 4.

This zipper 8 can also be made in a piece applied on the support 4.

The operation of the fail-lock that was described above.

In unlocked position, latch 1 is in position retracted inside the box 3, as it comes indicated in figure 1.

To bring latch 1 in the locked position, a handle or a cylinder key control is rotated or similar to a main box (not shown) to move the bar 5 and support 4 in the F1 direction.

During this operation, the support 4 that is moves in the direction of arrow F1 of figure 1, by means of the zipper 8 will ensure the rotation of the hook latch 1 with respect to its axis X-X 'in the direction F2, the direction of the hands of a clock in the figures.

Towards the end of the rotation run of the latch 1 (see figure 3), it protrudes out of the box Four.

The last tooth 12c of sector 7 is also located between the last two teeth 11b, 11c of the rack 8, when button 9 reaches the bottom of the notch 10.

At the end of the race (see figure 4), the support 4, driven by bar 5 in the F1 direction, has pushed, by the rear edge 10b, the button 9 in said direction F1, for continue to turn latch 1 to its starting position, in the direction F2, the clockwise direction in the figure. In this last rotation, the last tooth 12c of sector 7 has left its position geared and the space between teeth 11b and 11c of the rack 8 that have moved in the F1 direction, which has allowed to reach the position represented in figure 2, in opposition to each other of teeth 11c and 12c. Thus, button 9 has taken over from this last tooth 12c to ensure the continuation of the rotation of latch 1 under the action of support movement 4.

Opposition of the teeth up constitutes a spherical joint taken, in the final phase, to a break of balance that locks the rotation of the latch 1.

Indeed, in the position represented in the Figure 4, it is impossible to rotate latch 1 towards the position of unlocking applying an effort in the direction of the arrow F.

An effort at the end of the latch that tends to make it enter again, it will then directly transmit a effort essentially directed towards the bottom of the box. The latch is secure in the locked position.

The residual efforts that result and that tend to raise the rack again, starting with the support, are inhibited by the condemnation of the bar in the box main control of the fail-lock, being the bar for example raised directly during the condemnation of The main lock by the key. There is thus a double security against effraction.

For unlocking, only one rotation of the handle or key control of cylinder or similar box principal in the reverse F4 direction of that (F2) used for the blocking, that is to say in the figures in the opposite direction of the hands of a watch, it allows to take back latch 1 in its retracted position illustrated in figure 1.

With reference to figure 5, the displacement of the bar 5 and of the support 4 in the direction of the arrow F3 drives the rotation of latch 1 in the direction F4 towards the inside of the box 3, as follows:

Under the effect of the translation of the support 4, the button 9 reaches the bottom of the notch 10, passing from a support against the rear edge 10b (see figure 4) to a support against the leading edge 10a of the latter, which constitutes a race in a vacuum that facilitates the abandonment of the position in opposition to the  teeth 11c and 12. Under the thrust of this leading edge 10a, the latch 1 begins its rotation movement so that the tooth 12c of the toothed sector come progressively to engage in the teeth 11c and 11b of rack 8, starting the gear of the toothed sector 7 with rack 8 to the position of unlocking illustrated in figure 1, in which the tooth 12a of the Toothed sector is inserted into the corresponding space of the zipper 8, and button 9, released from notch 10, returns to its free position, substantially applied against bar 5.

Of course, the invention is not limited to example described above and numerous modifications they can be provided without leaving the scope of the invention.

Thus, the second gear means could be constituted by any means of complementary forms equivalent to the described button and notch, as long as your interaction leads to the opposition of the last tooth of the Toothed sector with a zipper tooth.

On the other hand, the invention is not limited to the realization of a secondary box. The invention can be applied to direct control of a hook latch by insurance associated with the X-X axis' in the case of a main box and in this case the hook-latch lock will control other latches located outside the perimeter of this box.

Claims (8)

1. Failure-lock comprising a hook latch (1) (2) swivel mounted inside a box (3) between an unlocked position and a locked locked position, cooperating this latch (1) with a support ( 4) connected, in turn, with a breaker bar (5), through actuating means and locking means of the latch (1) in locked locked position that prevent its return to the unlocked position during a direct action on this latch (1), the actuating means allowing the rotation of the latch (1) from the translation of the support (4) actuated by the bar (5), and comprising gear means, characterized in that the actuating means comprise first and second gear means, the first means (7, 8) comprising a toothed sector (7) integral with the latch (1) and substantially centered with respect to the axis of rotation (X, X ') of the latter, engaging this toothed sector (7) on the teeth of a c rivet (8) supportive of the support (4) to a position corresponding to a locking position of the latch (1), taking said second gear means (8, 9), integral, as well as the first, on the one hand with the latch (1), on the other hand with the support (4) then the relay of said first gear means, to continue the rotation of the latch to a locked locked position of the latch (1) in which the last tooth (12c ) of the toothed sector (7), released from the gear in the teeth (11b, 11c) of the rack (8), is in opposition to a tooth (11c) of the rack (8). 2. Failure-lock according to claim 1, characterized in that said tooth (11c) of the rack (8) and said tooth (12c) of the toothed sector (7) are constituted, respectively, by the last tooth of the rack (8) and the last tooth of the dentate sector (7). 3. Failure-lock according to claim 1 or 2, characterized in that said second gear means comprise a button (9) carried by the latch (1), this button being movable during the translation of the support (4) and the rotation of the latch (1) between a position in which this button (9) is free with respect to the support (4) and a position in which it is inserted in a notch (10) provided in the support (4), relieving said first gear means (7, 8) to ensure the rotation of the latch (1) to the locked locked position. 4. Failure-lock according to claim 3, characterized in that said notch (10) is provided near the last tooth (11) of the rack (8). 5. Failure-lock according to any of claims 3 or 4, characterized in that the notch (10) has a certain width in the direction of travel of the support (4) greater than the section of the button (9). 6. Failure-lock according to any of claims 3 to 5, characterized in that, in said locking position of the latch (1), the button rests against an edge of the notch (10) opposite the last tooth (11) of the zipper (8). 7. Failure-lock according to any one of claims 1 to 6, characterized in that the rack (8) is made directly on the support (4). 8. Failure-lock according to any of claims 1 to 6, characterized in that the zipper (8) is made in a piece applied on the support (4).