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A device for locking and unlocking, with a key, a cover on a frame. The rotor of the lock for this device has a cylindrical barrel mounted for rotation in the cover and being interdependent in rotation with the slide bolt and a cylindrical axle with head mounted loosely in the barrel. The device is

A device for locking and unlocking, with a key, a cover on a frame. The rotor of the lock for this device has a cylindrical barrel mounted for rotation in the cover and being interdependent in rotation with the slide bolt and a cylindrical axle with head mounted loosely in the barrel. The device is used in the area of road works.

대표청구항 ▼

The invention claimed is: 1. Locking and unlocking device with a key for a cover on a frame, comprising: a lock that is interdependent with the cover and the lock has an access opening for the key, the lock comprising; an arm having a bushing on an end of the arm that makes it possible to manipulat

The invention claimed is: 1. Locking and unlocking device with a key for a cover on a frame, comprising: a lock that is interdependent with the cover and the lock has an access opening for the key, the lock comprising; an arm having a bushing on an end of the arm that makes it possible to manipulate the lock when the key is introduced into the opening of the cover from a locking position, in which a slide bolt of the lock is held captive by a catch of the frame, to an unlocking position for which the slide bolt is released from the catch and the key is held captive in the opening of the cover, a rotor mounted for rotation in the cover, the rotor being accessible through the opening and coupled with the slide bolt, and the rotor being disposed perpendicular with the slide bolt in such a way as to allow the pivoting of the slide bolt around a longitudinal axis of the rotor due to the action of the key, between the locking and unlocking positions when the rotor is captive in and released from the catch, wherein the rotor of the lock comprises a generally cylindrical barrel mounted for rotation in the cover and being interdependent in rotation with the slide bolt and a cylindrical axle mounted loosely in the barrel, the cylindrical axle comprising: a cylindrical head in contact on the barrel and lodged in a cavity of the cover that is accessible from the outside through the opening of the cover and wherein means are provided for elastically and axially holding, in the cover, the barrel and the cylindrical axle, wherein the cylindrical head engages axially in the bushing of the key at the time of introduction of the cylindrical head into the cavity of the cover. 2. Device according to claim 1, wherein the slide bolt is made of a flat rigid plate having, in the area of one end of the plate, a hole in which two diametrically opposed radial arc-shaped notches are arranged and a third radial arc-shaped notch is pointed toward an opposite active free end of the plate of the slide bolt, wherein the barrel crosses the bottom wall of the cavity of the cover and comprises a circular head with radial pin engaged in the third notch of the slide bolt, the cylindrical head of the loose axle being in contact with the circular head of the barrel and engageably axially in the bushing of the key at the time of introduction of the cylindrical head into the cavity of the cover, wherein the bushing of the key comprises two diametrically opposed parallel external pegs that are able to engage, respectively, in the two opposing notches of the slide bolt in the locked position of the cover in the frame across from two diametrilcally opposed grooves of the lateral wall of cavity overhanging the two opposing notches of slide bolt and making it possible to bring into rotation of about one-quarter revolution the assembly with the loose axle, barrel and plate of the slide bolt by turning the key in a direction to move the slide bolt to an unlocking position, at which point the key is captive in the cover by the two pegs held axially, respectively, in two longitudinal recesses of the lateral wall of the cavity. 3. Device according to claim 2, wherein the length of each passage groove for a peg of the bushing of the key is smaller than the length of the notch that overhangs the plate of the slide bolt in a locked position of the cover in the frame in such a way that the notch would be inaccessible to a tool introduced into the opening of the cover and the groove to prevent any fraudulent manipulation of the slide bolt using the tool. 4. Device according to claim 2, wherein each peg of the bushing of the key has the shape of a reversed L, of which a small branch of the reversed L is interdependent radially with the bushing, and the other branch parallel to the arm of the key projects beyond the opening part of the bushing. 5. Device according to claim 1, wherein the plate of the slide bolt and the circular head of the barrel are in contact on the internal face of the bottom wall of cavity of the cover, and the means that elastically hold the head of the barrel in contact with the bottom wall and the cylindrical head of the loose axle on the head of the barrel comprise an elastic element mounted coaxially to a part of the barrel located on the outside of the bottom wall, the elastic element being prestressed between the external face of the bottom wall and a contact washer held axially with respect to the barrel by a pin crossing the free end of the loose axle projecting from the barrel. 6. Device according to claim 5, wherein the elastic element is in contact on the external face of the bottom wall by way of a wavy washer that is interdependent in rotation with the barrel and cooperates with four recesses made in this external face and spaced regularly around the passage hole of the barrel across from the bottom wall, at the time of rotation of the barrel, to position the slide bolt at one or the other of the locking and unlocking positions of the stopper on the frame. 7. Device according to claim 6, wherein the barrel comprises a flattened surface that works together with a flattened surface of the wavy washer to start the wavy washer in rotation when the slide bolt pivots. 8. Device according to claim 1, wherein the slide bolt projects to the outside of the lateral wall of the cavity of stopper the cover through a slot making it possible for the slide bolt to pivot around one-quarter revolution. 9. Locking and unlocking device with a key for a cover on a frame, comprising: a lock that is interdependent with the cover and the lock has an access opening for the key, the lock comprising: an arm having a bushing on an end of the arm that makes it possible to manipulate the lock when the key is introduced in to the opening of the cover from a locking position, in which a slide bolt of the lock is held captive by a catch of the frame, to an unlocking position for which the slide bolt is released from the catch and the key is held captive in the opening of the cover, a rotor mounted for rotation in the cover, the rotor being accessible through the opening and coupled with the slide bolt, and the rotor being disposed perpendicular with the slide bolt in such a way as to allow the pivoting of the slide bolt around a longitudinal axis of the rotor due to the action of the key, between the locking and unlocking positions when the rotor is captive in and released from the catch, wherein the rotor of the lock comprises a generally cylindrical barrel mounted for rotation in the cover and being interdependent in rotation with the slide bolt and a cylindrical axle mounted loosely in the barrel, the cylindrical axle comprising: a cylindrical head in contact on the barrel and lodged in a cavity of the cover that is accessible from the outside through the opening of the cover and wherein means are provided for elastically and axially holding, in the cover, the barrel and the cylindrical axle, wherein the slide bolt is made of a flat rigid plate having. in the area of one end of the plate, a hole in which two diametrically opposed radial arc-shaped notches are arranged and a third radial arc-shaped notch is pointed toward an opposite active free end of the plate of the slide bolt, wherein the barrel crosses the bottom wall of the cavity of the cover and comprises a circular head with radial pin engaged in the third notch of the slide bolt, the cylindrical head of the loose axle being in contact with the circular head of the barrel and engageable axially in the bushing of the key at the time of introduction of the cylindrical head into the cavity of the cover, wherein the bushing of the key comprises two diametrically opposed parallel external pegs that are able to engage, respectively, in the two opposing notches of the slide bolt in the locked position of the cover in the frame across from two diametrically opposed grooves of the lateral wall of cavity overhanging the two opposing notches of slide bolt and making it possible to bring into rotation of about one-quarter revolution the assembly with the loose axle, barrel and plate of the slide bolt by turning the key in a direction to move the slide bolt to the unlocking position, at which point the key is captive in the cover by the two pegs held axially. respectively, in two longitudinal recesses of the lateral wall of the cavity.