Abstract: An apparatus including: a sealing case 20 having a branch-shaped branch hole 23 formed in a first separate case 21 and extending in the radial direction C of an existing pipe 1; and a rubber packing 30 for sealing a gap between the sealing case 20 and the existing pipe 1, wherein: the first separate case 21 is provided with a flange 28 for allowing for attachment and removal of a boring machine 3; the sealing case 20 is capable of reciprocating in the pipe axis direction L; and the rubber packing 30 forms: a first sealed area S1 surrounding a portion of the sealing case 20 where the branch hole 23 is provided for shutting the branch hole 23; and a second sealed area S2 being adjacent to the first sealed area S1, sealed against the first sealed area S1, displaced from the first sealed area S1 in the pipe axis direction L, and sized so as to be able to shut the opening bored by a cutter 3a.

Abstract: A gear case part (70), which has an upper aperture that opens upward and which forms a recess that houses a portion of a drive gear device (63) and for which the drive gear device (63) can be inserted from the upper aperture and assembled, is provided integrally on the upper part of a first or second divided case (21, 22); a cover (66) that blocks the upper aperture of the gear case part (70) is fastened to the gear case part (70); an operating part (67) protrudes upward from a through-hole (66a) that vertically penetrates the cover (66); and by removing the cover (66) from the gear case part (70), the drive gear device (63) can be extracted from the gear case part (70) through the upper aperture.

Abstract: An object is to provide a pipe joint that enables claw portions 21, which have been biting into the outer circumference of the second pipe 120, to pull out from the outer circumference when locking members 20 are stopped from being pressed by press bolts 30, prevents the locking members 30 from being lost during transportation, and assures the locking members 30 to be sufficiently inclined when an external force in such a direction as to cause the first pipe 110 to be pulled out from the second pipe 120 has been acted on the pipe joint. The pipe joint includes an annular press ring 10 that is mounted around the insertion port 121 of the second pipe 120, the locking members 20 that have claw portions to bite into the outer circumference of the second pipe 120, the press bolts 30 that make the locking members 20 project outward from the inner circumference of the press ring 10, and the elastic members 40 that hold the locking members 20.

Abstract: An apparatus including a sealing case 20 having a branch-shaped branch hole 23 formed in a first separate case 21 and extending in the radial direction C of an existing pipe 1; and a rubber packing 30 for sealing a gap between the sealing case 20 and the existing pipe 1, wherein: the first separate case 21 is provided with a flange 28 for allowing for attachment and removal of a boring machine 3; the sealing case 20 is capable of reciprocating in the pipe axis direction L; and the rubber packing 30 forms: a first sealed area S1 surrounding a portion of the sealing case 20 where the branch hole 23 is provided for shutting the branch hole 23; and a second sealed area S2 being adjacent to the first sealed area S1, sealed against the first sealed area S1, displaced from the first sealed area S1 in the pipe axis direction L, and sized so as to be able to shut the opening bored by a cutter 3a.

Abstract: A branching unit for boring without stopping passage of fluid, which is suitable for forming an opening 11 at a pipe wall 12 by boring a part of the pipe wall 12 of an existing pipe 1 using a drill machine 3 having a hole saw 4 to connect a branch pipe to the existing pipe, comprising: a sealing case 20 having plurality of separate casing 21, 22 separated in a circumferential direction R and a branch pipe portion 27 protruding and branching off in the radial direction C; a valve body 5 rotating between an inner circumferential surface 29 of the separate casing 21, 22 and an outer circumferential surface 13 of the existing pipe 1 to open and close a branch hole 28; and a rotation mechanism 50 rotating the valve body 5.

Abstract: A non-bolt joint structure comprising; a packing ring sealing between a receiving opening section and an insertion opening section; an engaging means provided with an inner circumference of the receiving opening section preventing a polyethylene pipe from disengaging from the receiving opening section by engaging with an outer circumferential surface of the polyethylene pipe; and a tubular metallic inner core fitting an inner circumference of the insertion opening section of the polyethylene pipe, wherein the inner core is plastically deformed to include a first bulge portion that its cross-sectional shape bulges toward an outward radial direction, a second bulge portion is formed so that the insertion opening section of the polyethylene pipe bulges toward the outward radial direction along the first bulge portion of the inner core, and the polyethylene pipe is prevented from disengaging by the engaging means engaging with the outer circumferential surface of the second bulge portion.

Abstract: A gear case part (70), which has an upper aperture that opens upward and which forms a recess that houses a portion of a drive gear device (63) and for which the drive gear device (63) can be inserted from the upper aperture and assembled, is provided integrally on the upper part of a first or second divided case (21, 22); a cover (66) that blocks the upper aperture of the gear case part (70) is fastened to the gear case part (70); an operating part (67) protrudes upward from a through-hole (66a) that vertically penetrates the cover (66); and by removing the cover (66) from the gear case part (70), the drive gear device (63) can be extracted from the gear case part (70) through the upper aperture.

Abstract: A branching unit for boring without stopping passage of fluid, which is suitable for forming an opening 11 at a pipe wall 12 by boring a part of the pipe wall 12 of an existing pipe 1 using a drill machine 3 having a hole saw 4 to connect a branch pipe to the existing pipe, comprising: a sealing case 20 having plurality of separate casing 21, 22 separated in a circumferential direction R and a branch pipe portion 27 protruding and branching off in the radial direction C; a valve body 5 rotating between an inner circumferential surface 29 of the separate casing 21, 22 and an outer circumferential surface 13 of the existing pipe 1 to open and close a branch hole 28; and a rotation mechanism 50 rotating the valve body 5.

Abstract: A non-bolt joint structure comprising; a packing ring sealing between a receiving opening section and an insertion opening section; an engaging means provided with an inner circumference of the receiving opening section preventing a polyethylene pipe from disengaging from the receiving opening section by engaging with an outer circumferential surface of the polyethylene pipe; and a tubular metallic inner core fitting an inner circumference of the insertion opening section of the polyethylene pipe, wherein the inner core is plastically deformed to include a first bulge portion that its cross-sectional shape bulges toward an outward radial direction, a second bulge portion is formed so that the insertion opening section of the polyethylene pipe bulges toward the outward radial direction along the first bulge portion of the inner core, and the polyethylene pipe is prevented from disengaging by the engaging means engaging with the outer circumferential surface of the second bulge portion.