Abstract: A repair joint device capable of joining by welding divided housings and of facilitating the welding operation; and includes a plurality of circumferentially divided housings, wherein each divided housing has a divided sleeve, a pair of end plates provided on both end portions of the divided sleeve, and a seal accommodation projection provided on each end plate. A projection-free area is formed between the seal accommodation projections. An auxiliary projection device is provided on the projection-free area.

Abstract: An eccentric universal joint mechanism, even when there is a lateral displacement between a first pipe and a second pipe, can absorb the displacement and connect the first pipe and the second pipe. The eccentric universal joint mechanism includes: a first sleeve; a second sleeve; and an eccentric universal joint connecting the first sleeve and the second sleeve. The eccentric universal joint includes a first eccentric pipe, and a second eccentric pipe rotatably joined to the first eccentric pipe. A displacement between the center line of the first eccentric pipe and the center line of the second eccentric pipe is determined by the rotational position of the second eccentric pipe.

Abstract: An elbow-equipped expansion joint, even when there is an axial and lateral displacement between a first pipe and a second pipe, can absorb the displacement and connect the first pipe and the second pipe. The elbow-equipped expansion joint includes: an expandable joint including a first sleeve and a second sleeve; and a pair of rotatable elbows joined to both ends of the expandable joint. The elbows each include one elbow pipe, and the other elbow pipe rotatably joined to the one elbow pipe. The bend angle of each elbow can be changed by rotating the other elbow pipe.

Abstract: An eccentric universal joint mechanism, even when there is a lateral displacement between a first pipe and a second pipe, can absorb the displacement and connect the first pipe and the second pipe. The eccentric universal joint mechanism includes: a first sleeve; a second sleeve; and an eccentric universal joint connecting the first sleeve and the second sleeve. The eccentric universal joint includes a first eccentric pipe, and a second eccentric pipe rotatably joined to the first eccentric pipe. A displacement between the center line of the first eccentric pipe and the center line of the second eccentric pipe is determined by the rotational position of the second eccentric pipe.

Abstract: An elbow-equipped expansion joint, even when there is an axial and lateral displacement between a first pipe and a second pipe, can absorb the displacement and connect the first pipe and the second pipe. The elbow-equipped expansion joint includes: an expandable joint including a first sleeve and a second sleeve; and a pair of rotatable elbows joined to both ends of the expandable joint. The elbows each include one elbow pipe, and the other elbow pipe rotatably joined to the one elbow pipe. The bend angle of each elbow can be changed by rotating the other elbow pipe.

Abstract: A behavior inspection apparatus includes: a first measurement tool group including a set of first measurement tools each of which measures a first distance change amount that is a change amount of a distance between a first pipe position in the first pipe and a first reference position of a sleeve of the extensible flexible pipe joint; and a second measurement tool group including a set of second measurement tools each of which measures a second distance change amount that is a change amount of a distance between a second pipe poison in the second pipe and a second reference position of the sleeve. The first and second measurement tools are arranged at different positions in a circumferential direction of the sleeve. Displacement positions of the first and second pipes with respect to the joint are computed based on the measurement data by the first and second measurement tool groups.

Abstract: A behavior inspection apparatus includes: a first measurement tool group including a set of first measurement tools each of which measures a first distance change amount that is a change amount of a distance between a first pipe position in the first pipe and a first reference position of a sleeve of the extensible flexible pipe joint; and a second measurement tool group including a set of second measurement tools each of which measures a second distance change amount that is a change amount of a distance between a second pipe poison in the second pipe and a second reference position of the sleeve. The first and second measurement tools are arranged at different positions in a circumferential direction of the sleeve. Displacement positions of the first and second pipes with respect to the joint are computed based on the measurement data by the first and second measurement tool groups.

Abstract: A slip-out preventing apparatus for sliding type joint mechanisms, wherein packing members having lip portions in an opposed state and adapted to seal a clearance between a housing, which is fitted around outer surfaces of end portions of two tubular bodies to be joined together, and the same tubular bodies by utilizing a fluid pressure in the tubular bodies are provided on inner surfaces of both end portions of the housing, locking projections are formed on outer surfaces of both end portions of the housing with locking portions provided on the outer surfaces of the two tubular bodies, slip-out preventing covers being fitted fixedly around the tubular bodies so as to bestride and engage these locking portions and locking projections. In a joint mechanism having a housing which is provided with packing members therein, and which is in a slidable condition with respect to tubular bodies to be joined together, a slip-out of the housing from the end portions of the tubular bodies can be reliably prevented.

Abstract: Hollow spherical portions 3 and 4 respectively formed on both tubes 1 and 2 so provided as to face to each other are fitted to each other inside and outside and the faced tubes 1 and 2 are coupled so that they can mutually bend. Packings 5 and 5a in which a recessed portion is formed from the side in section are provided between the open ends 4a of the hollow spherical portions 3 and 4 fitted outside and the outside face of the hollow spherical portion 3 fitted inside. A lip portion 7 formed at least on one side of the recessed portion is joined to the open end face of the hollow spherical portion 4 fitted outside. And a holding member 9 provided to the open end face 4a of the hollow spherical portion 4 fitted outside is joined to the packings 5 and 5a.

Abstract: A general segment 20 which is propelled and set in an excavated hole by a propulsion excavating machine, and a flexible segment where flexible members 4 and rigid ring members are alternately installed and connected inside the skin-plate 7 provided on the outer periphery side of the side rings 5 having the same thickness as the general segment and a thrust-receiving member 9 is provided inside the flexible portion, are propelled and set by the propulsion excavating machine and then secondary coating concrete 30 including a secondary watertight band 15 is applied to said side ring. As a segment for a shield tunneling method, the flexible segment appropriately provides flexibility to quickly cope with earthquakes and uneven settlement. The flexible segment may be handled in the same manner as a standard general segment during excavation work, providing excellent application potential.

Abstract: A pipe coupling for repair, includes separate housings and seal rings to be accommodated in the receiving portions formed in the housings, a holding portion being formed on the internal diameter side of the separate end face in the individual housing to receive the projecting seals formed at the separate ends of the above seal rings and the seal rings forming multiple string-shaped ring seals as a single unit between both ends of the above projecting seals by surrounding the portion to be repaired, and having a blocking plug in the above housing for a hole to test the sealing conditions after fixing to a pipe.