PINCHING MECHANISM AND PILE PRESS-IN AND PULL-OUT MACHINE USING THE SAME

摘要

PROBLEM TO BE SOLVED: To solve the problem of a pinching claw of a current pinching mechanism that the pinching claw is easy to slip due to a lack of the pinching force and that efficiency in the pile pulling-out work is not good and easy to generate uneven abrasion in the only upper part of a surface of a movable claw due to repetition of the pile pulling-out operation and easy to generate a breakdown of the upper part of the pile at a part to be pushed by a large pushing force. SOLUTION: A surface of at least one of the movable claw 13 and a fixed claw 12 forming the pinching mechanism 11 of an on-pile working device for pinching a pile with the movable claw and the fixed claw is tilted in relation to a surface of a material 10 to be pinched so that a space between both the pinching claws 13 and 12 gradually becomes narrow downward.