VERTICALITY RETAINER FOR UNDERGROUND CUTOFF PLATE PENETRATION FRAME

摘要

PROBLEM TO BE SOLVED: To provide a verticality retainer for an underground cutoff plate penetration frame stably retaining the vertical attitude of an penetrating underground cutoff plate and to prevent the damage of the underground cutoff plate provided on the penetration frame. SOLUTION: This verticality retainer 4 for the underground cutoff plate penetration frame vertically moved along a leader 14 erected and supported by a base machine is provided with a horizontal member 41 movably supported along the leader 14 and having roller support bases 42 on both sides and a pair of upper rollers 43 and lower rollers 43 installed on the upper face and the lower face of the roller support bases 42 respectively and slidably supporting the flange sections 63 extended to the outside from the rear faces of both side ends of the penetration frame 6 as references to retain the vertical attitude of the penetration frame 6 at four points from both sides.