Fluiid pressure striking device

A fluid pressure hitting device, comprising:

• a cylinder having a cylindrical shape;
• a piston inserted in the cylinder and configured to slide in an axial direction of the cylinder;
• a chisel having a bar shape and fitted in the cylinder such that a part of the chisel projects from one axial end of the cylinder, the chisel being configured to further project from the one axial end due to being hit by the piston as the piston slides toward the one axial end;
• and
• a first chamber, a second chamber, and a third chamber partitioned by an inner peripheral surface of the cylinder and an outer peripheral surface of the piston, the first, second, and third chambers being arranged in the axial direction in order from the one axial end of the cylinder to another axial end of the cylinder, wherein:
• the piston is configured to slide between the one axial end and the other axial end of the cylinder when a fluid pressure in the first chamber is shifted between a high fluid pressure and a low fluid pressure,
• a flow path is configured to supply fluid from a fluid supply portion to the first chamber, and
• the fluid supply portion has a fluid pressure higher than a fluid pressure of the first chamber when the piston hits the chisel.