Abstract: A pipe lining material is wound in a roll on a rotary body using an electric motor, and stored in a storage container. Wen everting, compressed air is applied within the storage container to pull the lining material from the storage container and evert it via an eversion nozzle attached to the storage container. At this time, the electric motor functions as an electric generator and brakes the pullout of the pipe lining material. With such a constitution, the pullout speed of the pipe lining material is substantially constant and the pipe lining material can be smoothly everted with little pullout resistance.

Abstract: A lateral pipe lining material comprises a tubular resin absorbing material impregnated with a setting resin, which has a flange at one end thereof and whose outer surface is coated with a highly airtight film. A sealing tube is detachably attached to the outer circumferential surface of the tubular resin absorbing material. The lateral pipe lining material is introduced inside a main pipe and its flange is brought into tight contact with the lateral pipe opening. The lateral pipe lining material including the sealing tube is then everted and inserted by fluid pressure inside a lateral pipe toward the ground level. After the setting resin is cured, the sealing tube is removed from the lateral pipe lining material. This enables the lining of a lateral pipe to always be performed reliably, regardless of the aboveground circumstances.

Abstract: A block unit for repairing flow passage facilities is provided for permitting a desired repair operation. A method of repairing flow passage facilities using the block unit is also provided. The block unit includes an inner plate defining an inner surface, an outer plate disposed along a peripheral edge of the inner plate, and a plurality of reinforcing ribs for reinforcing the inner plate and the outer plate. The block units adjoining in a circumferential direction are joined together with bolts inserted through both circumferential end faces of each the block unit and nuts fitted on the bolts to form a short tube within a flow passage. The short tubes are connected in a longitudinal direction to form a continuous tubular assembly having an outer diameter smaller than an inner diameter of the flow passage. A grout material is injected into a clearance space formed between the tubular assembly and the flow passage.

Abstract: A pipe liner bag everting nozzle is provided for allowing an operator to freely access a manhole during a lining operation. A pipe liner bag everting nozzle comprises a guide tube fixing end for fixing one end of a guide tube, and a pipe liner bag fixing end for fixing a folded end of an uneverted pipe liner bag passed through the guide tube, wherein the guide tube fixing end has a diameter smaller than a diameter of the pipe liner bag fixing end. Since a guide tube having a smaller diameter than that of a pipe line to be repaired (or the pipe liner bag) can be used, a sufficient gap is formed between the guide tube and the manhole, thereby allowing the operator to freely access the manhole during the lining operation for inspection and confirmation of a lining situation.

Abstract: A rehabilitating pipe having a flange at one end thereof is laid inside a first existing pipe so that the flange contacts an inner circumferential surface portion of a second existing pipe surrounding a portion where the first and second existing pipes intersect. A flange part of a flanged tubular member is adhesively fixed to the inner circumferential surface of the second existing pipe so that the flange part covers the flange of the rehabilitating pipe and the inner circumferential surface portion of the second existing pipe. A tubular part of the flanged tubular member is adhered to the rehabilitating pipe to thereby seal a gap between an inner circumference of the first existing pipe and an outer circumference of the rehabilitating pipe.

Abstract: A segment is coupled to additional segments to constitute a rehabilitating pipe for repairing an existing pipe. The segment comprises an inner plate that defines the inner circumferential surface of the rehabilitating pipe and has an opening therein for performing the work of mutually coupling the segments in the circumferential direction of the rehabilitating pipe, and a cover that is fitted into the opening from the bottom surface side of the inner plate. To fix the cover to the inner plate, the cover is provided with a projection and with an engaging member that is movable between non-engaging and engaging positions. The cover is fitted into the opening with the projection into engagement with the inner plate on one side edge of the opening and the engaging member is then brought into engagement with the inner plate on the other side edge thereof, thereby fixing the cover to the inner plate to plug the opening thereof.

Abstract: A tubular lining material for an existing pipe is comprised of a flexible resin absorber impregnated with a liquid setting resin and is radially spread out at one end part to form a plurality of cut pieces. A flange of a flexible resin absorber impregnated with a liquid setting resin is stacked on the cut pieces and brought into pressure contact with a surface surrounding the pipe opening of the existing pipe before the lining material is evertedly inserted into the existing pipe. The liquid setting resin in the flange and the cut pieces is cured and fixed to the surrounding surface of the pipe opening of the existing pipe. Such an arrangement enables the complete sealing of a gap between the inner circumference of the existing pipe and the outer circumference of the lining material at the circumferential edge part of the pipe opening of the existing pipe because the flange is cured in conformation to t the surrounding surface of the pipe opening of the existing pipe.

Abstract: A segment for a rehabilitating pipe is coupled to another segment in the circumferential and longitudinal directions of a rehabilitating pipe to rehabilitate an existing pipe. The segment has on one coupling surface a protruding part and a recessed part continuous with the protruding part and on another coupling surface a recessed part and a protruding part whose shapes respectively conform to the protruding part and the recessed part of one coupling surface. The protruding part and the recessed part of one coupling surface of one segment is brought into tight surface contact with the recessed part and protruding part of another coupling surface of another segment and interfitted thereto when one and another segments are mutually coupled in the circumferential and longitudinal directions of the rehabilitating pipe.

Abstract: A segment comprises an inner plate having an inner circumferential surface that is planar or curved at a prescribed curvature, two side plates provided upright on each side edge of the inner plate, and two end plates provided upright on each end edge of the inner plate. The inner plate and the side and end plates are integrally formed of plastic and an outer circumferential part facing the existing pipe or the inner circumferential surface of the inner plate or both thereof is covered by a rehabilitating plate made of a resin sheet. The segments are coupled in the circumferential direction and in the pipe longitudinal direction and a filler material is poured into each segment to constitute a rehabilitating pipe. The segments provided with the rigid resin sheets thereon make the rehabilitating pipe strongly resistant to external shock and corrosion. The rehabilitating pipe thus functions not merely as a repairing pipe, but rather also as a self supporting pipe.

Abstract: A rehabilitating pipe is laid inside a main pipe that intersects with a manhole. A flanged tubular member is provided which comprises a tubular part and a flange part each comprising a flexible resin absorber impregnated with liquid setting resin. With the resin in an unhardened state, the flange part is brought into pressure contact with the inner circumferential surface of the manhole for adhesion thereto by curing the resin. The tubular part is then inserted in the rehabilitating pipe for adhesion to the inner circumferential surface thereof. This makes it possible to seal the gap between the inner circumference of the main pipe and the outer circumference of the rehabilitating pipe thereof.

Abstract: Segments are successively coupled in the circumferential direction and the vertical direction to provide a rehabilitating pipe that rehabilitates an exiting pipe such as a manhole extending in the vertical direction. The segments are coupled in the vertical direction by stacking segments on previously assembled segments. A gap between the existing pipe and the rehabilitating pipe is filled with a filler after completion of the assembly as a rehabilitating pipe. The filler is hardened to integrate the rehabilitating pipe with the existing pipe as a compound pipe. With such an arrangement, the rehabilitating pipe can be laid by a simple method because the segments can be stacked on previously assembled segments using the segments' own weight.

Abstract: Segments are mutually coupled in the circumferential and longitudinal directions to assemble a rehabilitating pipe for rehabilitating an existing pipe. Rod-shaped coupling members are used to couple the segments in the longitudinal direction. Before assembly, an anchor ring, having a hole through which the coupling members are inserted, is fixed beforehand to an inner wall surface of the existing pipe. The coupling members are inserted through the segments in the longitudinal direction and through the hole of the anchor ring. This allows the assembled rehabilitating pipe to be supported by the anchors inside the existing pipe.

Abstract: A spacer is constituted by overlapping on a first wedge-shaped member, whose upper surface is inclined at a prescribed angle, a second wedge-shaped member, whose lower surface is inclined at the same angle. This spacer is inserted in the gap between a inner wall surface of an existing pipe and the outer periphery of a rehabilitating pipe. Latching teeth are formed in the inclined surfaces of the first and second wedge-shaped members so that, when pressing the second wedge-shaped member to move it toward the first wedge-shaped member in the insertion direction, it cannot move in the direction the reverse of the insertion direction. Upon moving the second wedge-shaped member to the respective latch positions, the overall height of the spacer is successively increased in steps at a fine pitch, thus enabling the adjustment of the position of the rehabilitating pipe with respect to the existing pipe to be performed simply.

Abstract: A segment is coupled to another segment in the circumferential and longitudinal directions to assemble a rehabilitating pipe for rehabilitating an existing pipe. The segment is provided with a recessed part in a coupling surface in the longitudinal direction at a portion that is brought into contact with the bottom surface of the existing pipe when the rehabilitating pipe is laid inside the existing pipe. When the segments are coupled in the longitudinal direction of the rehabilitating pipe, the recessed part forms a gap between the coupling surfaces to provide a space for accommodating waste existing on the bottom surface of the existing pipe, thus enabling the coupling work in the longitudinal direction to be performed simply and in a short period of time because it is unnecessary to remove the waste.

Abstract: A rehabilitating pipe is assembled inside an existing pipe using segments to repair the existing pipe. A coupling member is inserted through a segment when it is coupled in the longitudinal direction to another segment coupled already, and the coupling member is joined to the coupling member of another segment already coupled. During joining the segment is clamped against another segment and both the segments are coupled in the longitudinal direction. Such steps are repeated to couple other segments to segments already coupled until the rehabilitating pipe is laid to a predetermined length.

Abstract: A segment is coupled to additional segments to constitute a rehabilitating pipe for repairing an existing pipe. The segment comprises an inner plate that defines the inner circumferential surface of the rehabilitating pipe and has an opening therein for performing the work of mutually coupling the segments in the circumferential direction of the rehabilitating pipe, and a cover that is fitted into the opening from the bottom surface side of the inner plate. To fix the cover to the inner plate, the cover is provided with a projection and with an engaging member that is movable between non-engaging and engaging positions. The cover is fitted into the opening with the projection into engagement with the inner plate on one side edge of the opening and the engaging member is then brought into engagement with the inner plate on the other side edge thereof, thereby fixing the cover to the inner plate to plug the opening thereof.

Abstract: A method of repairing a flow passage is provided that allows prevention of deformation of a tubular assembly after hardening of grout material, to maintain the tubular assembly in a desired cylindrical shape. The method comprises the steps of forming a tubular assembly in a pipe, the tubular assembly having an outer diameter smaller than an inner diameter of the pipe; filling a grout material in a clearance between the tubular assembly and the inner wall of the pipe; disposing a tubular expansible and contractile pressure bag within the clearance between the tubular assembly and the inner wall of the pipe in a longitudinal direction of the pipe; filling the pressure bag with a fluid to expand the pressure bag; and supporting the tubular assembly with the expanded pressure bag.

Abstract: A pipe liner bag everting nozzle is provided for allowing an operator to freely access a manhole during a lining operation. A pipe liner bag everting nozzle comprises a guide tube fixing end for fixing one end of a guide tube, and a pipe liner bag fixing end for fixing a folded end of an uneverted pipe liner bag passed through the guide tube, wherein the guide tube fixing end has a diameter smaller than a diameter of the pipe liner bag fixing end. Since a guide tube having a smaller diameter than that of a pipe line to be repaired (or the pipe liner bag) can be used, a sufficient gap is formed between the guide tube and the manhole, thereby allowing the operator to freely access the manhole during the lining operation for inspection and confirmation of a lining situation.

Abstract: A pressure bag is used to line a branch pipe, wherein a heat medium hose can be securely pulled with an everting force of a branch pipe liner bag to stably line the branch pipe. The pressure bag has one end closed by an end collar for containing the branch pipe liner bag. The end collar is formed with a hot water supply port and a hot water discharge port, as well as a sealing member for slidably supporting a pull rope or a belt extending therethrough in an air-tight seal. A hot water supply pipe in communication with the hot water supply port is disposed within the end collar, and a flexible hot water hose is attached to the hot water supply pipe. The hot water hose is folded and contained in the pressure bag. A head collar comprising a head collar push-up lever is attached to the end of the pressure bag opposite to the end to which the end collar is attached.

Abstract: A pipe liner bag everting nozzle is provided for allowing an operator to freely access a manhole during a lining operation. A pipe liner bag everting nozzle comprises a guide tube fixing end for fixing one end of a guide tube, and a pipe liner bag fixing end for fixing a folded end of an uneverted pipe liner bag passed through the guide tube, wherein the guide tube fixing end has a diameter smaller than a diameter of the pipe liner bag fixing end. Since a guide tube having a smaller diameter than that of a pipe line to be repaired (or the pipe liner bag) can be used, a sufficient gap is formed between the guide tube and the manhole, thereby allowing the operator to freely access the manhole during the lining operation for inspection and confirmation of a lining situation.