| 摘要 |
PROBLEM TO BE SOLVED: To provide a pull-in device which relaxes an impact force generated when a unit is pulled in and enables improvement of the workability when the unit is pulled out.SOLUTION: A pulled-in device includes: a coil spring which biases a unit in a direction of a device body; and an air damper 43. The air damper 43 includes: a cylinder 61 in which a through hole 66 is formed at a bottom part 61a; a piston 62 which forms an air chamber 67 between itself and the bottom part 61a; and a sheet-like elastic member 64 having an air hole 68 having a diameter smaller than the through hole 66. The sheet-like elastic member 64 is disposed between the bottom part 61a and the piston 62. When the air chamber 67 is in a positive pressure state, the sheet-like elastic member 64 closely contacts with the bottom part 61a, the air hole 68 overlaps with the through hole 66, and the air chamber 67 communicates with the exterior through the air hole 68. On the other hand, when the air chamber 67 is in a negative pressure state, the sheet-like elastic member 64 is separated from the bottom part 61a to form a gap G between itself and an inner wall 61b of the cylinder 61 and allow the air chamber 67 to communicate with the exterior through the through hole 66.SELECTED DRAWING: Figure 6 |
