ADAPTOR APPARATUS

PROBLEM TO BE SOLVED: To prevent dropout of an adaptor in the case that an external force has acted without having to impair workability when mounted to a tube body or sealability. SOLUTION: An adaptor apparatus is provided with an tubular adaptor having a base end part having an internal diameter larger than that of a large diameter part of the tube body; a tightening member passed through a base part of the tube body closer to the base end side than the large diameter part and mounted to a base end external circumferential part of the adaptor via tightening means constituted inbetween with an external circumferential part of the adaptor; and a packing member interposed among the internal circumferential surface of the tightening member, the external circumferential surface of the base part of the tube body, the base face of the adaptor, the internal circumferential surface of the adaptor, and the large diameter part of the tube body and elastically deformed and sealed by the external circumferential surface of the base part of the tube body, the base face of the adaptor, and the inner circumferential surface of the adaptor in the case that the adaptor is tightened to the tightening member. COPYRIGHT: (C)2010,JPO&INPIT