| 摘要 |
A pull-in device for a string includes a tubular cylinder, a piston adapted to move inside the cylinder, an urging spring for elastically urging the piston inside the cylinder in the direction of one terminal part of the cylinder, and a string to be pulled in or pulled out with the movement of the piston. The device is characterized by a plurality of hooking parts, each capable of slidably hooking the string, that are formed on the piston as mutually opposed across the center of the piston, a hooking part capable of slidably hooking the string that is formed on a cap adapted to close the other terminal opening part of the cylinder, one terminal part of the string pulled out of the cylinder, intervening points of the whole length of the string hooked serially on the hooking parts and as folded back, and the other terminal part of the string fixed on the cylinder or piston.
|
