| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a heat-proof piston/cylinder device that in forming a cooling medium flow passage, eliminates formation of a spiral groove on the outer peripheral surface of a cylinder by cutting or the like and eliminates a cutting program corresponding to a necessary length.SOLUTION: In a heat-proof piston/cylinder device A, a piston 30 including a piston rod 34 is internally inserted into a cylinder 10 so as to be movable forward and backward, and a cooling medium flow passage 50 is installed in the cylinder 10. The cooling medium flow passage 50 is formed by externally inserting a spiral member 51 into the outer wall surface of the cylinder 10 and externally inserting a cover cylinder body 52 into the outer wall surface of the cylinder 10 so as to cover the spiral member 51.</p> |
