SCREW BACK TWIST ABSORBING DEVICE

摘要

The invention consists of a device for the receiving of the momentum of reaction by screw-fastening, which can be adapted to a portable screwing head executing the continuous powered clamping in installations by screwing, as for example the mounting of route poles.According to the invention, the device is composed of a cylindrical extension stiffened to the cage of a portable screwing head, whose dimensions permit the development of the maximum torque, complying also with the maximum dimension of the screw with the above screwing head; the extension ends with a frontal teething which engages with a counterpiece internal gearing of the aperture of a simple or double arm, which rests on screws, ribs or neighbouring walls belonging to the pieces or to the metallic structure to be mounted by screw-fastening, where the double arm is built up of two parts which can be mounted under various angles.