DRIVING JOINT CONSTRUCTION OF SMALL CALIBER PIPE EMBEDDING MACHINE

PROBLEM TO BE SOLVED: To make it possible to easily connect joint axes formed of a rigid body even if the axes are slipped from each other. SOLUTION: A driving shaft 101 of a small caliber pipe embedding machine is connected to the axial end of a screw conveyer, at the same time, it is equipped with a fitting section 107 having a joint fixed section for transferring torque to the screw conveyer and a fitting pivoted section extended from the joint fixed section and a rotary bearing section 106 driven and rotated by a driving motor 114 through a power transfer mechanism of a driving device 100 while fitting and bearing the fitting section 107 and transferring torque to the fitting section 107, part of the fitting pivoted section is formed in a spherical shape, at the same time, a cross section is formed in a polygonal shape, the fitting pivoted secion is fitted to a cylindrical hol low section of the rotary bearing section 106, and the fitting pivoted section is so constituted that it can be pivoted at a specific angle inside the rotary bearing section 106. Accordingly, even if the axial end of the screw conveyer is slipped from the driving shaft 101, joint can be easily made by pivoting the fitting pivoted section.