| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve durability of a seal member of a valve mechanism. <P>SOLUTION: A gas spring device 10 includes: a cylindrical tube 20 with a bottom; a piston 30; a pushrod 40; and a valve mechanism 50. A valve part 42 for constituting the valve mechanism 50 is provided in the pushrod 40. The valve mechanism 50 includes: a through-hole 32 for penetrating inside the piston 30; a guide member 100 provided in the through-hole 32; and the valve part 42 which is slidably inserted into a center hole of the guide member 100. In the guide member 100, a lubricant holding part 104 for holding lubricant is formed at inner periphery of the center hole. Seal members 110A and 110B are provided on each of both ends of the guide members 100. According to sliding in a shaft direction of the valve part 42 of the pushrod 40, the lubricant held in the lubricant holding part 104 adheres to a bottom large-diameter part 44 of the valve part 42 little by little, and is supplied to a pair of seal members 110A and 110B. <P>COPYRIGHT: (C)2012,JPO&INPIT |
