LOCKING AND UNLOCKING DEVICE USING A KEY OF A BUFFER ON A FRAME WITH THE POSSIBILITY OF AUTOMATIC KEYLESS LOCKING OF THIS BUFFER ON THE FRAME

摘要

The present invention relates to a device for locking and unlocking using a key of a buffer on a frame with possibility of automatic locking without key of this stamp on the frame. According to the invention, the device is characterized in that the bolt (11) of the latch (5) comprises a rod (11a) biased to its captive position of the striker (12) by an elastic return member (14) and the driving mechanism (10, 25) cooperates with the bolt (11) to enable the automatic locking of buffer (1) to the frame (2) when the key is removed from the buffer (1) in its disengaged position from the opening of the frame (2) and the buffer (1) comprises a cap cap (34) closing the opening opening (4) of the buffer (1). The invention finds application in the field of manholes.