Cylinder acceleration mechanism

A cylinder acceleration mechanism for an actuating cylinder including a bottom-side chamber and a rod-side chamber each of which has a variable capacity achieved by a piston moving back and forth inside of a tube, a length by which an actuating rod provided to the piston projects from the tube being increased and decreased,

• the cylinder acceleration mechanism comprising:
• a buffer tank that supplies and discharges oil to and from a bottom-side line that is connected to the bottom-side chamber of the actuating cylinder, and
• an inversion lever having an intermediate fulcrum as a rotation axis, wherein
• the buffer tank includes a buffer chamber with a variable capacity achieved by a seal lid moving back and forth inside of a case, and is configured to extend and to reduce a length by which a coupling rod provided to the seal lid projects from the case, a bottom-side branching line that is branched from the bottom-side line is connected to the buffer chamber,
• the actuating rod of the actuating cylinder and the coupling rod of the buffer tank are coupled to respective ends of the inversion lever, and
• the actuating rod and the coupling rod extend and retract alternately with respect to each other as the inversion lever turns.