Abstract: A cable chain having a number of chain unit members made of synthetic resin, wherein each of the chain unit members includes a supporting plate for mutually connecting together a pair of side plates opposite each other at an appointed interval and side plates opposite each other at both ends of the supporting plate at a lower portion thereof. A covering member made of synthetic resin covers an upper opening of the respective chain unit members, and a hinge member is provided which is made of synthetic resin having an integral hinge property. The hinge member is molded in advance to be a plate-like member having an engaging portion to be engaged in an attaching hole secured at the respective supporting plates of adjacent chain unit members, or is welded to and linked with the respective supporting plates of adjacent chain unit members by injection.

Abstract: A tubular joint including at least a pair of connection ports having an inner diameter substantially equivalent to an outer diameter of tubes to be connected, and a tubular connection part connecting the connection ports to each other. The connection ports each have a sealing member formed integrally thereon by extruding elastomer resin into a first recess formed around an axial line on an inner circumferential face of the connection ports, and the connection ports each have a fall-out preventing member coupled to an end part of the connection ports. The fall-out preventing member includes a ring-like member having an outer diameter sized for insertion into the connection ports, and a number of claws having leading edges located in a second recess formed around the axial line on the inner circumferential face of the connection ports and extending toward a center of the connection ports.