| 摘要 |
A clamp rod (5) is vertically movably inserted into a housing (3), and a detection hole (58) is formed in a lower end wall (3b) of the housing (3), substantially concentrically with an axis of the clamp rod (5). An inlet hole (71, 72) for supplying compressed air is opened in a peripheral surface of the detection hole (58). Into the detection hole (58), a detection member (62) is fitted vertically movably, the detection member (62) having a closing surface (68) which closes an opening portion (71a, 72a) of the inlet hole (71, 72), and a recessed portion (69) through which the opening portion (71a, 72a) is communicatively connected to outside air. The detection member (62) is connected to a downward projecting portion (5a) of the clamp rod (5). The detection member (62) is urged by an elastic member (91) toward the opening portion (71a, 72a). |
