Thin cylinder with load possible of dense forest preventing

摘要

A thin cylinder capable of preventing the swinging of the operating rod according to the present invention is characterized in that the operating rod is forwardly and backwardly inserted so as to be forwardly and rearwardly displaced, a first flow passage for introducing a first hydraulic pressure for advancing the operating rod to the rear, A first check valve provided in the first flow path, a second check valve provided in the second flow path, and a second check valve provided in the first flow path, A position sensor that is operated only when the first check valve is opened to sense the movement of the operating rod, and a position sensor that detects the movement of the operating rod when the position sensor detects a predetermined forward distance , The first check valve is closed so that the backward movement due to the swinging motion of the operating rod is blocked, Wherein the cylinder body is provided with a support member for supporting the first plunger of the first check valve and the second plunger of the second check valve provided in the communication path formed between the first flow path and the second flow path, .