Kit to assist in the manual change of a tool from a rotary tool holder

A method of using a kit to assist in the manual change of a tool from a tool holder, the latter comprising a rotary tool gripper and a non-rotary part presenting a flat front wall, the rotary tool gripper projecting from the flat front wall and comprising a shaft segment that is provided with two shaft flats and defines an axial direction, the kit comprising a forked holding element provided with two fingers, each of which has an inside surface and an outside surface, so that the two respective inside surfaces face each other and each outside surface has an orientation substantially opposite to that of its corresponding inside surface, each finger being suitable to be fitted by its inside surface on one shaft flat, and a locking plate that comprises a recess and is suitable to be fixedly mounted on the flat front wall with the recess facing it, said recess being configured to house the two fingers fitted on the two shaft flats when the locking plate is mounted on the flat front wall, the recess extending across the locking plate and being delimited by two steps against which the two fingers can be fitted by their outside surfaces, the method comprising the following steps to be performed by an operator:

• with the locking plate mounted on the front wall, fitting the fingers onto the shaft flats, whereby the holding element is made rotatably integral with the tool gripper and the latter is prevented from rotating beyond the positions in which the fingers engage the steps in the recess;
• using two hands to dismount the tool from the tool gripper, as the latter is locked for rotation and does not need to be held;
• using two hands to mount the same or another tool on the tool gripper;
• extracting the holding element from the locking plate, thus releasing the tool gripper.