| 摘要 |
PROBLEM TO BE SOLVED: To form the parts of a safety device with a low strength material by arranging the safety member near a fixed portion and stretching a projection member in the groove of the fixed portion through the opening of the safety member at the locking position time of a piston cylinder assembly. SOLUTION: A fixed portion 6 is arranged near a safety member 1 and at the stretching time of a piston rod, the safety member 1 slides under a projection member 8 and bracket 7 and the projection member 8 is pushed into the opening 2 by a twist spring pressure and into the groove 13 of the fixed portion 6 during passing the opening 2 of the safety member 1. When the piston rod is further stretched, the projection member 8 is pushed up to the rear side of the opening 2 and inclined on the safety member 1. When the piston rod is pulled in, the projection member 8 is pushed in the groove 13 through the opening 2 and when the piston rod is further pulled in, the surface 14 of the safety member 1 is contacted to the projection member 8 and run and the safety member 1 is fixed to the fixed portion 6. By above constitution, even an inexpensive material with a low strength can work as the safety device surely. |
