| 摘要 |
A synthetic resin-made fastening-limiting device employed for limiting a fastening force of a fastening member in case of fastening a connection portion between a pipe receiving port of the joint and a pipe by means of the fastening member. In the fastening-limiting device, an appropriate sealing property of the pipe connection portion and a screw amount of the fastening member required in trying to preventing the pipe from slipping off can be surely determined. Furthermore, the operator can recognize easily the appropriate screw amount of the fastening member by a sound and a touch. This fastening-limiting device has a ring portion fittable onto the pipe receiving port of the joint A and a protrusion disposed on the ring portion. On a side of one end in an axial direction of the ring portion, a first abutting portion is formed. On a side of the other end in an axial direction of the ring portion, a second abutting portion is formed. A gap a between the first abutting portion and the second abutting portion is equal to a distance between a reference face and a confronting portion in a state wherein the fastening member exhibits functions such as sealing property and prevention of slipping-off. On either side of the protrusion, recessed portions and are formed, and projections are disposed on a side of the joint.
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