Abstract: A safety device for quick-fastening a tool to the end of an arm including two portions (1 and 2), one of which is attached to the arm of the machine and the other of which is attached to the tool. The first portion (1) includes a cradle (3) that is insertable under the arm of the other portion (2) having an extension (5) in the form of a hook, having at least one side lug (10) that can pass through notched openings (8, 9) in the first portion (1) and in a locking plate (6). The locking plate (6) is capable of sliding on the middle portion of the first portion (1) so as to be inserted under the hook extension (5) by springs (7). The locking plate (6) is provided with an abutment member (12) that limits the return movement of the plate (6) in order to prevent the notched openings (8, 9) from coinciding.

Abstract: The invention relates to a safety device for quick-fastening, comprising two portions (1 and 2), one of which is attached to the arm of the machine and the other of which is attached to the tool, wherein the first portion (1) comprises a cradle that is insertable under the arm of the other portion (2) having an extension (5) in the form of a hook, provided with at least one side lug (10) that can pass through notched openings in the first portion (1) and in a locking plate (6) sliding on the middle portion of said first portion so as to be inserted under the hook (5) by springs, characterized in that the locking plate is provided with an abutment member that limits the return movement of said plate in order to prevent the abovementioned notched openings from coinciding.