| 摘要 |
PURPOSE:To easily remove a support bed from a shaft provided coaxially with a spring by removing one end of the torsion coil spring coupled with the support bed from the support bed. CONSTITUTION:When a shaft 12 is to be fitted to a support bed 10, the shaft 12 is brought into contact with the bottom of a U-shaped groove 19 on a wall section 11, one end of a torsion coil spring 15 provided coaxially with the shaft 12 is coupled with one of grooves 22 of a stop member 13 and the other end is coupled with the wall section 11, and the shaft 12 is fitted to the support bed 10. On the contrary, when the support bed 10 is to be removed from the shaft 12, one end of the torsion coil spring 15 coupled with the wall section 11 of the support bed 10 is released from its coupling to release the rotating force of this coil spring 15, thereby the support bed 10 can be simply removed from the shaft 12. |
