Plants for immersion of bodyworks

A plant for immersion treatment of vehicle bodies, the plant comprising:

• at least one skid configured to support a body;
• at least one process liquid tank;
• and
• a conveyor line configured to convey the at least one skid above the at least one process liquid tank;
• wherein the at least one skid comprises a base part, for support and movement along the conveyor line, and a support part, for supporting the body,
• wherein the support part is supported on the base part using a rotatable shaft with axis arranged transverse to a direction of movement of the at least one skid on the conveyor line, so that the support part is rotatable between a first position, in which the body is not immersed in the at least one process liquid tank, and a second position for immersing the body in the at least one process liquid tank,
• wherein the at least one skid comprises a toothed wheel connected kinematically to the rotatable shaft for controlled rotation,
• wherein alongside the at least one process liquid tank, there is provided at least one rotation actuating device which comprises a rack configured to engage the toothed wheel in order to actuate the rotation of the support part using the movement of the at least one skid along the conveyor line,
• wherein the at least one skid comprises a controllable locking/unlocking device configured to lock/unlock free rotation of the rotatable shaft,
• wherein the controllable locking/unlocking device is set to an unlocking position using interference between an actuating shoe of the controllable locking/unlocking device and at least one actuating surface alongside the at least one process liquid tank, and
• wherein in a locking position, the controllable locking/unlocking device locks the toothed wheel in a prefixed angular position of a tooth of the toothed wheel with respect to an engaging element of the controllable locking/unlocking device.