| 摘要 |
PROBLEM TO BE SOLVED: To provide a fluid pressure cylinder capable of securing sealability of a plug for closing a rod internal passage of a piston rod, and preventing the plug from slipping off to the inside of a cylinder tube.SOLUTION: A hydraulic cylinder 1 includes a rod internal passage 21 formed in a piston rod 30 along the axial direction and communicating a fluid pressure source with the inside of a cylinder tube 10, a plug 40 inserted from an opening end 16 opened in the cylinder tube 10 of the rod internal passage 21, a lateral hole formed on the piston rod 30 along the radial direction while intersecting the rod internal passage 21, and a pin 57 inserted to the lateral hole. The piston rod 30 is provided with an inner peripheral screw portion formed on an inner periphery of the rod internal passage 21 of the piston rod 30, and the plug 40 is provided with an outer peripheral screw portion screwed into the inner peripheral screw portion, and an engagement portion 43 engaged with the pin 57 for stopping the rotation of the plug 40. |
