Belt-shaped components for rehabilitating existing pipes

Abstract

To provide a strip-shaped member in which an outer peripheral surface of a regeneration pipe is made as smooth as possible while avoiding difficulty of producing the regeneration pipe, and suppressing depression of a ground surface.SOLUTION: There is provided a strip-shaped member 10 for an existing pipe regeneration, in which a lid plate portion 12 constituting a pipe wall portion 9b on an outer peripheral side of a regeneration pipe 9 is covered on an outer peripheral side of a bottom plate portion 11 constituting a pipe wall portion 9a on an inner peripheral side of the regeneration pipe 9. A first fitting portion 13 is provided at one end of the bottom plate portion 11 in a width direction, and at another end of the bottom plate portion 11 in the width direction, a second fitting portion 14 that is unevenly fitted with the first fitting portion 13 is provided. The bottom plate portion 11 or the first fitting portion 13 and the lid plate portion 12 are connected by a plurality of vertical plate portions 15 arranged at intervals in the width direction. A plurality of hollow portions 19 separated by the vertical plate portions 15 are formed side by side in the width direction.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a strip-shaped member for rehabilitating deteriorated existing pipes, and more particularly to a strip-shaped member made of synthetic resin that constitutes a spiral rehabilitation pipe that is lined on the inner periphery of an existing pipe. [Background technology]

[0002] There is a known method of rehabilitating an existing pipe such as an aged sewer pipe by lining the inner circumference of the existing pipe with a rehabilitation pipe. The rehabilitation pipe is made of, for example, a strip-shaped member made of synthetic resin (see, for example, Patent Documents 1 to 5, etc.).

[0003] This type of belt-shaped member includes a flat belt portion, male and female mating portions, and reinforcing ribs. The female mating portion has a mating groove that opens to the inner periphery and is raised from one end of the width direction of the belt portion toward the outer periphery. The male mating portion has a mating protrusion that protrudes from the other end of the width direction of the belt portion toward the outer periphery. Here, the inner periphery side refers to the side that faces radially inward when made into a rehabilitated pipe. The outer periphery side refers to the side that faces radially outward when made into a rehabilitated pipe.

[0004] A reinforcing rib is provided at the widthwise intermediate portion of the band plate portion so as to protrude toward the outer periphery. In general, the reinforcing rib is formed in an I-shaped or T-shaped cross section. A plurality of reinforcing ribs are arranged at intervals in the width direction of the band-shaped member (see Patent Documents 1 to 3, etc.). The reinforcing rib in Patent Document 4 is formed with a U-shaped cross section and is filled with a filler. The strip-shaped member in Patent Document 5 is formed with a single reinforcing protrusion having a hollow rectangular or circular cross section. The strip-shaped member in Patent Document 6 is formed with a single reinforcing protrusion having an H-shaped cross section.

[0005] The belt-shaped member is wound in a spiral shape by a pipe-making machine and is pinched by a pair of pinch rollers of the pipe-making machine so that the fitting grooves and fitting protrusions of adjacent male and female fitting parts are fitted together, thereby forming a helical rehabilitated pipe from the belt-shaped member (see Patent Document 1, etc.). [Prior art documents] [Patent documents]

[0006] [Patent Document 1] International Publication WO2016 / 175243 (Figures 3 and 4) [Patent Document 2] JP 2020-143710 A (Figs. 2 and 11) [Patent Document 3] International Publication WO02 / 048594 (Figures 16 and 25) [Patent Document 4] JP 06-143420 A (Fig. 1) [Patent Document 5] JP 2018-155280 A (Fig. 3) [Patent Document 6] JP 11-105134 A (Fig. 1) Summary of the Invention [Problem to be solved by the invention]

[0007] In the conventional belt-shaped members for rehabilitating existing pipes disclosed in the above-mentioned patent documents, the male and female fitting parts and the reinforcing ribs are protruded toward the outer periphery, so that the outer periphery of the rehabilitated pipe made of the belt-shaped member has multiple spiral irregularities. Therefore, if backfilling between the existing pipe and the rehabilitated pipe is omitted, groundwater and earth and sand may get into the concave parts on the outer periphery of the rehabilitated pipe, causing it to collapse. On the other hand, if the band-shaped member is made into a simple thick-walled flat plate shape without any irregularities, it is not easy to align the fitting using a pipe making machine when making a spiral pipe, and it is also not easy to bend and deform the pipe, which causes problems during pipe making. In view of the above circumstances, the present invention has an object to make the outer surface of a rehabilitated pipe as smooth as possible while not interfering with the manufacturing of the rehabilitated pipe, thereby suppressing the collapse of the ground surface. [Means for solving the problem]

[0008] In order to solve the above problems, the present invention provides a belt-shaped member for rehabilitating an existing pipe, which is made of a synthetic resin and constitutes a spiral-shaped rehabilitation pipe that is lined on the inner circumference of an existing pipe, a bottom plate portion constituting a pipe wall portion on an inner periphery side of the rehabilitating pipe; a cover plate portion that covers an outer circumferential side of the bottom plate portion and constitutes a pipe wall portion on an outer circumferential side of the rehabilitating pipe; A first fitting portion provided at one end in a width direction of the bottom plate portion; a second fitting portion provided at the other end in the width direction of the bottom plate portion and fitted into the first fitting portion in the rehabilitation pipe; a plurality of vertical plate portions that connect the bottom plate portion or the first fitting portion and the cover plate portion and are arranged at intervals in the width direction; The present invention is characterized in that a plurality of hollow portions separated by the vertical plate portions are formed side by side in the width direction.

[0009] When producing a rehabilitating pipe from the band-shaped member, a pipe-making machine (see Patent Documents 1 to 3, etc.) is used to spirally wind the band-shaped member and engage the adjacent first and second fitting portions. At this time, for example, by making the fins of the pinch rollers of the pipe-making machine be applied to the edge of the cover plate portion of the band-shaped member or the side of the second fitting portion, the band-shaped member can be positioned in the width direction relative to the pipe-making machine, and the first and second fitting portions can be accurately aligned and fitted to each other. In addition, it is easier to bend and deform compared to a simple thick-walled flat band-shaped member. Therefore, even if the outer periphery of the band-shaped member is composed of a flat cover plate portion, pipe production can be prevented from being hindered. In the rehabilitation pipe made of the belt-shaped member, at least a part of the outer periphery is formed by the cover plate, so that the volume of the recessed portion on the outer periphery of the rehabilitation pipe can be reduced. Therefore, even in a backfill-less construction method that omits backfilling between the existing pipe and the rehabilitation pipe, the amount of groundwater and soil flowing into the recessed portion can be reduced, and the collapse of the ground surface can be suppressed. Furthermore, the belt-shaped member has a plurality of hollow portions, which increases the rigidity and suppresses cross-sectional deformation.

[0010] The other end of the bottom plate portion in the width direction extends beyond the cover plate portion, It is preferable that the cover plate portion covers 80% or more of the width of the bottom plate portion excluding the other end portion from the outer periphery side. This makes it possible to make most of the outer circumferential surface of the rehabilitated pipe smooth, further preventing collapse.

[0011] It is preferable that the cover plate portion continuously spans the plurality of vertical plate portions, whereby most of the outer circumferential surface of the rehabilitating pipe can be made smooth, and collapse can be further suppressed. The cover plate is preferably disposed at a height within ±10% of the design height along the thickness direction of the band-shaped member. The cover plate may be disposed at a height equal to or higher than the design height and elastically pressed toward the bottom plate. This makes it possible to minimize the gap between the existing pipe and the rehabilitated pipe, even if a recess has formed on the inner peripheral surface of the existing pipe due to deterioration. The first fitting portion or the vertical plate portion may protrude outward from the cover plate portion.

[0012] The intermediate vertical plate portion in the width direction may have two adjacent vertical plate portions, and a recessed groove opening into the outer circumferential surface of the cover plate portion may be formed between these vertical plate portions. In this way, during pipe making, the belt-shaped member can be reliably positioned in the width direction relative to the pipe making machine by inserting the fins of the pinch rollers of the pipe making machine into the grooves. In this case, the total width of the portion of the cover plate portion facing the bottom plate portion excluding one end portion in the width direction is preferably larger than the total width of the groove, and more preferably sufficiently larger than the total width of the groove.

[0013] It is preferable that a filler is provided in the groove, which can prevent groundwater and earth and sand from flowing into the groove and suppress collapse. Preferably, the filler is filled into the entire groove of the belt-shaped member before the member is made into a pipe, and more preferably, the filler is filled into the groove in parallel with the formation of the belt-shaped member.

[0014] It is preferable that the filler is elastically compressible toward the inner circumference. This allows the filler to be inserted into the groove and positioned while being compressed by the pinch roller fins of the pipe making machine during pipe making. When the fins are then removed from the groove, the filler elastically returns to the outer circumference, preventing groundwater and earth and sand from flowing into the groove and suppressing collapse. The filler may be a simple filling material that fills the recessed grooves, and may not have elastic compressibility.

[0015] It is preferable that a positioning protrusion is provided on the extended portion (the other end in the width direction) of the bottom plate portion so as to protrude outwardly. As a result, during pipe production, the fins of the pinch rollers of the pipe production machine are placed against the positioning protrusions, allowing the belt-shaped member to be accurately positioned in the width direction relative to the pipe production machine. Therefore, the first fitting portion and the second fitting portion can be accurately aligned with each other and reliably fitted together. Effect of the Invention

[0016] The belt-shaped member for rehabilitating existing pipes of the present invention makes it possible to make the outer surface of the rehabilitated pipe as smooth as possible while not interfering with the production of the rehabilitated pipe, thereby suppressing collapse of the ground surface. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is a cross-sectional view of an existing pipe that has been rehabilitated with a rehabilitation pipe made of a strip-shaped member according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is a cross-sectional view perpendicular to the longitudinal direction of the belt-shaped member. [Diagram 3] FIG. 3 is a cross-sectional view showing the engagement state between the pinch rollers of the pipe making machine and the belt-shaped member during pipe making. [Figure 4] FIG. 4 is an enlarged cross-sectional view of the circle IV in FIG. [Diagram 5] FIG. 5 is a cross-sectional view perpendicular to the longitudinal direction of a belt-shaped member according to a second embodiment of the present invention. [Figure 6]FIG. 6 is an enlarged cross-sectional view showing a portion of an existing pipe that has been rehabilitated with a rehabilitation pipe made of a band-shaped member according to the second embodiment. [Figure 7] FIG. 7 is a cross-sectional view perpendicular to the longitudinal direction of a belt-shaped member according to a third embodiment of the present invention. [Figure 8] FIG. 8 is a cross-sectional view showing an engagement state between the pinch rollers of the pipe making machine and the belt-shaped member during pipe making in the third embodiment. [Figure 9] FIG. 9 is a cross-sectional view perpendicular to the longitudinal direction of a belt-shaped member according to a fourth embodiment of the present invention. [Figure 10] FIG. 10 is an enlarged cross-sectional view showing a part of an existing pipe that has been rehabilitated with a rehabilitation pipe made of a band-shaped member according to the fourth embodiment. [Figure 11] FIG. 11 is a cross-sectional view perpendicular to the longitudinal direction of a belt-shaped member according to a fifth embodiment of the present invention. [Figure 12] FIG. 12 is a cross-sectional view showing an engagement state between a pinch roller of a pipe making machine and a belt-shaped member during pipe making in the fifth embodiment. [Figure 13] FIG. 13 is an enlarged cross-sectional view showing a part of an existing pipe that has been rehabilitated with a rehabilitation pipe made of a band-shaped member according to the fifth embodiment. [Figure 14] FIG. 14 is a cross-sectional view perpendicular to the longitudinal direction of a belt-shaped member according to a sixth embodiment of the present invention. [Figure 15] FIG. 15 is a cross-sectional view showing an engagement state between the pinch rollers of the pipe making machine and the belt-shaped member during pipe making in the sixth embodiment. [Figure 16] FIG. 16 is an enlarged cross-sectional view showing a part of an existing pipe that has been rehabilitated with a rehabilitation pipe made of a band-shaped member according to the sixth embodiment. [Figure 17] FIG. 17 is a sectional perspective view of a portion of a belt-shaped member according to a seventh embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. First Embodiment As shown in Fig. 1, a spiral rehabilitation pipe 9 is lined on the inner circumference of an aged existing pipe 1. This rehabilitates the existing pipe 1. The existing pipe 1 is, for example, a sewer pipe buried underground. A rehabilitation pipe 9 is installed for each sewer pipe between two manholes 4. The existing pipe 1 to be rehabilitated is not limited to a sewer pipe, but may be a water supply pipe, an agricultural water pipe, a water pipe for hydroelectric power generation, a gas pipe, a tunnel, or the like.

[0019] Preferably, the rehabilitation pipe 9 is a self-supporting pipe that provides the required strength by itself without relying on the strength of the existing pipe 1. No backfilling material is filled between the inner circumference of the existing pipe 1 and the rehabilitation pipe 9 to structurally integrate the two. The rehabilitation pipe 9 is constructed using a backfill-less construction method. Preferably, the rehabilitation pipe 9 is attached to the inner circumference of the existing pipe 1 over its entire circumference, and there is almost no gap between the outer circumference of the rehabilitation pipe 9 and the inner circumference of the existing pipe 1. At the pipe mouth connected to the manhole 4, it is preferable that a water-stopping material (not shown) be provided between the inner periphery of the existing pipe 1 and the outer periphery of the rehabilitation pipe 9.

[0020] The rehabilitation pipe 9 is composed of a strip-shaped member 10 (profile) for rehabilitating an existing pipe. The strip-shaped member 10 is wound in a spiral shape to form the helical rehabilitation pipe 9. The material of the strip-shaped member 10 is a synthetic resin such as polyvinyl chloride. The strip-shaped member 10 is formed by extrusion molding of the synthetic resin. The strip-shaped member 10 has sufficient rigidity to make the rehabilitation pipe 9 a self-supporting pipe.

[0021] As shown in Fig. 2, the belt-shaped member 10 includes a bottom plate portion 11, a cover plate portion 12, fitting portions 13 and 14, and a plurality of vertical plate portions 15, and extends in a direction perpendicular to the plane of the paper in Fig. 2. The cross section perpendicular to the longitudinal direction of the belt-shaped member 10 is formed to have a constant shape. In other words, the cross-sectional shape is the same at any position in the longitudinal direction of the belt-shaped member 10.

[0022] The bottom plate portion 11 constitutes the pipe wall portion 9a (FIG. 1) on the inner periphery side of the rehabilitating pipe 9, and is formed in a flat band shape with a constant thickness. The cover plate portion 12 constitutes the pipe wall portion 9b (FIG. 1) on the outer periphery side of the rehabilitating pipe 9, and is formed in a flat band shape with a constant thickness, and covers the outer periphery side (upper side in FIG. 2) of the bottom plate portion 11. The thickness of the cover plate portion 12 is preferably about the same as the thickness of the bottom plate portion 11. The cover plate portion 12 and the bottom plate portion 11 face each other apart in the thickness direction of the band-shaped member 10 (up and down in FIG. 2). In addition, the cover plate portion 12 is arranged shifted toward one end side in the width direction (left side in FIG. 2) with respect to the bottom plate portion 11. Therefore, one end portion 12f in the width direction of the cover plate portion 12 extends toward one end side (left side in FIG. 2) beyond the bottom plate portion 11. The other end 11e in the width direction of the bottom plate portion 11 extends toward the other end side (the right side in FIG. 2) beyond the cover plate portion 12. The cover plate portion 12 covers preferably 80% or more of the width direction of the bottom plate portion 11 excluding the other end 11e from the outer periphery side (the upper side in FIG. 2), and more preferably covers the entirety (100%) of the bottom plate portion 11 excluding the other end 11e from the outer periphery side (the upper side in FIG. 2) as in this embodiment.

[0023] A first fitting portion 13 is provided at one end (the left side in FIG. 2) of the plate portions 11 and 12 and thus the strip-shaped member 10 in the width direction. The first fitting portion 13 opens to the inner circumferential side (the lower side in FIG. 2). No. 1 The first fitting portion 13 is formed in a generally triangular cross-sectional shape having a fitting groove 13a. The first fitting portion 13 protrudes from the bottom plate portion 11 toward one end side in the width direction (to the left in FIG. 2) and is raised from the bottom plate portion 11 toward the outer periphery (upward in FIG. 2).

[0024] One end 12f in the width direction of the cover plate portion 12 covers the outer periphery side (upper side in FIG. 2) of the first fitting portion 13. In other words, the first fitting portion 13 is covered from the outer periphery side by one end 12f in the width direction of the cover plate portion 12. The first fitting portion 13 is supported by and connected to both the bottom plate portion 11 and the cover plate portion 12. It is sufficient that the first fitting portion 13 is connected to at least one of the bottom plate portion 11 and the cover plate portion 12.

[0025] As shown in FIG. 2, a second fitting portion 14 is provided on a portion 11e of the bottom plate portion 11 that extends beyond the cover plate portion 12 toward the other end side in the width direction (the right side in FIG. 2). (Second fitting protrusion) is formed in a generally arrow-shaped cross section and protrudes from bottom plate portion 11 towards the outer periphery.

[0026] As shown in Fig. 2, a plurality of vertical plate portions 15 are provided between the bottom plate portion 11 and the cover plate portion 12. Each vertical plate portion 15 is erected in the thickness direction of the belt-shaped member 10. The plurality of vertical plate portions 15 are arranged at intervals in the width direction of the belt-shaped member 10. Of these vertical plate portions 15, a vertical plate portion 15A at one end side in the width direction connects the top of the first fitting portion 13 and the cover plate portion 12. The vertical plate portions 15 other than the vertical plate portion 15A connect the bottom plate portion 11 and the cover plate portion 12.

[0027] The cover plate portion 12 is continuous across these vertical plate portions 15. One widthwise end portion 12f of the cover plate portion 12 extends further toward one end side (left side in FIG. 2) than the vertical plate portion 15A. The other widthwise end portion of the cover plate portion 12 intersects with the outer peripheral end portion (upper end portion in FIG. 2) of the vertical plate portion 15B closest to the other end side (right end portion in FIG. 2).

[0028] As shown in Fig. 2, a plurality of hollow portions 19 are formed between the bottom plate portion 11 and the cover plate portion 12 of the belt-shaped member 10. Each hollow portion 19 is defined by the bottom plate portion 11, the cover plate portion 12, and a vertical plate portion 15 adjacent thereto in the width direction. A portion of a hollow portion 19A at one end side (the left end in Fig. 2) of the belt-shaped member 10 in the width direction is defined by a first fitting portion 13. These hollow portions 19 are arranged side by side in the width direction of the belt-shaped member 10. Adjacent hollow portions 19 are separated from each other by the vertical plate portion 15.

[0029] As shown in Figs. 1 and 4, in the helical rehabilitating pipe 9, adjacent fitting portions 13, 14 of the helically wound belt-shaped member 10 are fitted together. That is, the convex second fitting portion 14 is fitted into the fitting groove 13a of the first fitting portion 13. The parts of both ends of the bottom plate portion 11 in the width direction that are offset by one turn are butted against each other to form a helical seam 9c, and the parts of both ends of the cover plate portion 12 in the width direction that are offset by one turn are butted against each other to form a helical seam 9d. The seam 9c appears on the inner peripheral surface of the rehabilitating pipe 9. The seam 9d appears on the outer peripheral surface of the rehabilitating pipe 9. As shown by the two-dot chain line in Fig. 4, the seams 9c, 9d may be provided with a water-stopping material (not shown).

[0030] As shown in Figs. 1 and 3, when producing a rehabilitating pipe 9 from a strip-shaped member 10, a pipe-making machine (see Patent Documents 1 to 3) is used to spirally wind the strip-shaped member 10 and engage the first and second fitting portions 13 and 14 adjacent to each other. At this time, a pair of pinch rollers 31 and 32 of the pipe-making machine pinch the strip-shaped member 10 and apply a driving force. In addition, of the pinch rollers 31 and 32, the fins 33A to 33C of the outer pinch roller 31 facing the cover plate portion 12 are engaged with the strip-shaped member 10. In detail, the fin 33A is applied to the edge of one end 12f of the cover plate portion 12 in the width direction, and the fin 33B is applied to the outer surface of the vertical plate portion 15B on the other end side in the width direction. In addition, the pair of fins 33C are applied to both side surfaces of the second fitting portion 14. As a result, even though the outer periphery of the belt-shaped member 10 is formed by the flat cover plate portion 12, the belt-shaped member 10 can be positioned in the width direction relative to the pipe making machine, and the first and second fitting portions 13, 14 can be accurately aligned and fitted together reliably. Furthermore, the belt-shaped member 10 is easier to bend and deform than a belt-shaped member having a simple thick-walled flat plate shape. As a result, pipe making can be performed easily.

[0031] Preferably, the rehabilitating pipe 9 is attached to the entire circumference of the existing pipe 1. As a method of attachment, for example, as described in Patent Document 2, the rehabilitating pipe 9 may be twisted in the diameter expansion direction to slide the fitting parts 13, 14 against each other along the winding direction, and an expansion pipe may be attached by utilizing the elasticity of the belt-shaped member 10 using the pipe-making machine of Patent Document 3. The pipe-making machine of Patent Document 1 may be used to overfeed the belt-shaped member 10 while applying the brakes to the pipe-making machine, thereby making an expanded diameter pipe. This makes it possible to prevent almost no gap from being formed between the inner peripheral surface of the existing pipe 1 and the outer peripheral surface of the rehabilitating pipe 9. Therefore, a backfill-less construction method that omits the backfilling material between the existing pipe 1 and the rehabilitating pipe 9 can be adopted.

[0032] In the rehabilitated pipe 9 manufactured in this manner, the outer pipe wall portion 9a is formed of a smooth cover plate portion 12. This makes it possible to prevent the formation of recesses on the outer periphery of the rehabilitated pipe 9. Therefore, even if no backfilling material is filled between the existing pipe 1 and the rehabilitated pipe 9, it is possible to prevent groundwater and earth and sand from flowing into the recesses on the outer periphery of the rehabilitated pipe 9, and to prevent the ground surface from collapsing. Furthermore, the belt-shaped member 10 and thus the rehabilitation pipe 9 have a plurality of hollow portions 19, which increases the rigidity, suppresses cross-sectional deformation, and ensures the strength of the pipe when it stands by itself.

[0033] Next, another embodiment of the present invention will be described. In the following embodiments, the same components as those in the above-described embodiment will be denoted by the same reference numerals in the drawings, and the description thereof will be omitted as appropriate. <Second embodiment (FIGS. 5 and 6)> As shown in FIG. 5, in the belt-shaped member 10B of the second embodiment, the first fitting portion 13 is formed of two (plural) No. 1 Fitting groove 13b and No. 1 The fitting protrusions 13d are formed alternately to have a concave-convex cross-sectional shape. No. 1 The fitting groove 13b is open to the inner circumferential side (the lower side in FIG. 5 ). No. 1The fitting protrusion 13d protrudes toward the inner periphery (the lower side in FIG. 5). The first fitting portion 13 protrudes toward one end in the width direction (the left side in FIG. 5) from the bottom plate portion 11. One end portion 12f in the width direction of the cover plate portion 12 extends beyond the bottom plate portion 11 and covers the first fitting portion 13 from the outer periphery.

[0034] In the belt-shaped member 10B, all of the four (plural) vertical plate portions 15, including the vertical plate portion at one end in the width direction, connect the cover plate portion 12 and the bottom plate portion 11. The belt-shaped member 10B does not have a vertical plate portion 15A (FIG. 2) that connects the cover plate portion 12 and the first fitting portion 13. The first fitting portion 13 is connected only to the bottom plate portion 11.

[0035] The second fitting portion 14 at the other end 11e in the width direction of the bottom plate portion 11 of the belt-shaped member 10B is formed of two (plural) Second Fitting protrusion 14b and Second The first fitting portion 13 has alternate fitting grooves 14d and is formed with a concave-convex cross-sectional shape that is complementary to the first fitting portion 13. Second The fitting protrusion 14b protrudes toward the outer periphery (upward in FIG. 5), Second The fitting groove 14d opens toward the outer periphery (upper side in FIG. 5).

[0036] As shown in Fig. 6, in a rehabilitating pipe 9 made of a belt-shaped member 10B, the fitting protrusion 14b fits into the fitting groove 13b in the fitting portions 13, 14 adjacent to each other but one turn apart in the spirally wound belt-shaped member 10, and the fitting protrusion 13d fits into the fitting groove 14d. This increases the strength of the fitting. The cover plate 12 constituting the outer circumferential pipe wall portion 9b covers the outer circumferential sides (upper side in Fig. 6) of these fitting portions 13, 14. In the second embodiment, similarly to the first embodiment, the recessed portion on the outer circumferential surface of the rehabilitation pipe 9 is almost completely eliminated, thereby preventing collapse.

[0037] <Third embodiment (FIGS. 7 and 8)> As shown in Fig. 7, a belt-shaped member 10C of the third embodiment is provided with a positioning protrusion 17. The positioning protrusion 17 protrudes toward the outer periphery (upward in Fig. 7) from a portion between the vertical plate portion 15B and the second fitting portion 14 at the other end portion 11f in the width direction of the bottom plate portion 11. The height of the positioning protrusion 17 is higher than the second fitting portion 14 and lower than the vertical plate portion 15.

[0038] As shown in FIG. 8, in the pipe making machine of the third embodiment, the fins 33A, 33D, and 33E of the outer pinch roller 31 are engaged with the belt-shaped member 10C. The thickness of the fin 33D is approximately equal to the distance between the vertical plate portion 15B and the positioning protrusion 17. The fin 33D is inserted between the vertical plate portion 15B and the positioning protrusion 17. The fin 33E is placed on the side of the positioning protrusion 17 on the second fitting portion 4 side. The positioning protrusion 17 is sandwiched between the fins 33D and 33E from both sides. This allows the belt-shaped member 10 to be accurately positioned in the width direction (left and right in FIG. 8) relative to the pipe making machine during pipe making. Therefore, the first and second fitting portions 13 and 14 can be accurately aligned and reliably fitted to each other.

[0039] <Fourth embodiment (FIGS. 9 and 10)> As shown in Fig. 9, the belt-shaped member 10D of the fourth embodiment has a double first fitting portion 13 and a double second fitting portion 14. More specifically, two first fitting portions 13 are provided side by side at one end portion in the width direction of the belt-shaped member 10D (the left end portion in Fig. 9). The bottom portions of these first fitting portions 13 are directly connected to each other, and the bottom portion of the first fitting portion 13 on the bottom plate portion 11 side is connected to the bottom plate portion 11. In addition, the top portion of each first fitting portion 13 is connected to one end portion 12f in the width direction of the cover plate portion 12 via the vertical plate portion 15A. At the other end 11e of the bottom plate portion 11 in the width direction, two second fitting portions 14 are provided side by side.

[0040] 10, during pipe manufacturing in the fourth embodiment, each second fitting portion 14 is fitted into the corresponding first fitting portion 13. The belt-shaped member 10D is manufactured so that the entire circumference of the belt-shaped member 10D is attached to the inner peripheral surface of the existing pipe 1. Therefore, almost no gap is formed between the inner peripheral surface of the existing pipe 1 and the rehabilitating pipe 9.

[0041] As a method of attaching, preferably, an expansion pipe is made (see Patent Document 2). That is, after making the rehabilitating pipe 9 to a diameter smaller than the inner diameter of the existing pipe 1, the rehabilitating pipe 9 is twisted in the diameter expansion direction and attached to the inner peripheral surface of the existing pipe 1. When making the pipe to the small diameter, the two second fitting parts 14 are fitted into the corresponding first fitting parts 13. By using a double fitting structure, the pipe can be made reliably. After that, the base of one of the second fitting parts 14C is cut and separated from the bottom plate part 11. Preferably, the second fitting part 14C has an easy-to-cut part 14e such as a constricted groove formed therein. This makes it easier for the remaining fitting parts 13 and 14D in the fitted state to slide along the winding direction, making it easier to twist and expand the diameter of the rehabilitating pipe 9. In the case where one of the second fitting portions 14C can slide without being cut, the rehabilitation pipe 9 may be twisted to expand (enlarge) its diameter without being cut.

[0042] <Fifth embodiment (FIGS. 11 to 13) As shown in Fig. 11, in the belt-shaped member 10E of the fifth embodiment, a vertical plate portion 15E in the middle in the width direction has two adjacent vertical plate portions 15d. A groove 15c is formed between these vertical plate portions 15d. The groove 15c opens to the outer peripheral surface (upper surface in Fig. 11) of the cover plate portion 12 and thus the belt-shaped member 10E. Therefore, the cover plate portion 12 is divided in the width direction by the groove 15c. The total width of the portion of the cover plate portion 12 facing the bottom plate portion 11 (excluding one end portion 12f in the width direction) is larger than the total width of the groove 15c, preferably sufficiently larger than the total width of the groove 15c, for example, several times or more the total width of the groove 15c.

[0043] The filler 20 is provided in the entire area of ​​the recessed groove 15c. Preferably, the surface of the filler 20 exposed on the outer periphery side is flush with the outer periphery surface of the cover plate portion 12. The filler 20 is made of an elastic material and can be elastically compressed toward the inner periphery side (the lower side in FIG. 11). Examples of the elastic material include elastomer, rubber, urethane, sponge, semi-cured filler, and slow foaming and expanding material.

[0044] An elastic material 22 is attached to the outer surface of the vertical plate portion 15B at the other end side in the width direction of the belt-shaped member 10E (the right side in FIG. 11). The material of the elastic material 22 may be the same as that of the filler 20, or may be different. The filling of the filler 20 and the attachment of the elastic material 22 are preferably carried out before the pipe is made, and more preferably, are carried out in parallel with the extrusion molding of the belt-shaped member 10E.

[0045] 12, during pipe making in the fifth embodiment, the fins 33F of the outer pinch rollers 31 of the pipe making machine are inserted into the recessed grooves 15c. This allows the belt-shaped member 10E to be accurately positioned in the width direction relative to the pipe making machine, and allows the fitting portions 13, 14 to be reliably fitted together. The fins 33B of the outer pinch roller 31 are attached to the vertical plate portion 15B via an elastic member 22.

[0046] As the fins 33F are inserted into the recessed grooves 15c, the filler 20 is elastically compressed toward the inner periphery. When the fins 33F are then removed from the recessed grooves 15c, the filler 20 elastically returns to the outer periphery. This makes it possible to prevent the recessed grooves 15c from becoming voids in the rehabilitating pipe 9 made of the strip-shaped member 10E as shown in Fig. 13. This makes it possible to prevent groundwater and earth and sand from flowing into the recessed grooves 15c, thereby preventing the occurrence of subsidence. In the rehabilitation pipe 9, one end 12f in the width direction of the cover plate portion 12 of the spirally wound belt-shaped member 10E abuts against the vertical plate portion 15B with the elastic member 22 interposed therebetween.

[0047] Sixth embodiment (FIGS. 14 to 16) As shown in FIG. 14, the belt-shaped member 10F in the sixth embodiment has a groove 15c and a filler 20 similar to the fifth embodiment (FIG. 11), and has double first and second fitting portions 13 and 14 similar to the fourth embodiment (FIG. 9).

[0048] As shown in Fig. 15, during pipe making in the sixth embodiment, the fins 33F of the outer pinch rollers 31 of the pipe making machine are inserted into the recessed grooves 15c, as in the fifth embodiment (Fig. 12). This allows the belt-shaped member 10F to be accurately positioned in the width direction relative to the pipe making machine, and allows the fitting portions 13, 14 to be fitted together reliably. As shown in FIG. 16, a rehabilitating pipe 9 can be attached to the inner peripheral surface of the existing pipe 1 by further performing expansion pipe making or the like.

[0049] <Seventh embodiment (FIG. 17)> As shown in Fig. 17, the belt-shaped member 10G in the seventh embodiment is similar to the sixth embodiment (Fig. 14) in that it has a recessed groove 15c and has a double first fitting portion 13 and a double second fitting portion 14C, 14D. Meanwhile, the recessed groove 15c is hollow, and the filler 20 (Fig. 14) is omitted. In addition, a dividing groove 12g is formed between the portions of the cover plate portion 12 that are connected to the tops of the two first fitting portions 13 to separate them. The hollow portion 13g between the two first fitting portions 13 opens to the outer circumferential surface of the belt-shaped member 10G via the dividing groove 12g. In the rehabilitation pipe 9 made of the strip-shaped member 10G, groundwater and earth and sand may flow into the recessed groove 15c and the hollow portion 13g, but the amount of the inflow can be reduced by narrowing the opening width of the recessed groove 15c and the dividing groove 12g, thereby preventing the ground surface from collapsing.

[0050] The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, the cover plate portion 12 only needs to cover the outer circumferential side of the bottom plate portion 11, and one widthwise end portion 12f of the cover plate portion 12 does not necessarily need to extend beyond the bottom plate portion 11 toward the one widthwise end side, and the cover plate portion 12 does not necessarily need to cover the outer circumferential side of the first fitting portion 13. The first fitting portion may be convex and protrude toward the inner periphery, and the second fitting portion may be concave and open toward the outer periphery. The number of vertical plate portions 15 is not limited to four or five as in the embodiment, but may be two or three, or may be six or more. A plurality of embodiments may be combined with each other. For example, in the fourth and sixth embodiments, similar to the first embodiment, etc., it is not limited to expansion pipe making, but pasting pipe making may be performed using a pipe making machine such as those in Patent Documents 1 and 3. The positioning protrusion 17 of the third embodiment (FIGS. 7 to 8) may be provided on a strip-shaped member of an embodiment other than the third embodiment. To further increase the rigidity of the strip, the hollow portion 19 may be provided with a brace. The vertical plate portion 16d may be formed to have an arc-shaped cross section. A pair of adjacent vertical plate portions 16d may be formed to have a generally circular cross section as a whole. The cover plate portion 12 may be divided into a plurality of cover plate portions in the width direction, each cover plate portion being connected to the bottom plate portion 11 via a vertical plate portion 15, and a slit may be formed between the opposing ends of adjacent cover plate portions, the slit communicating with the hollow portion 19. In this case, it is preferable to provide a filler material in the slit to prevent the inflow of groundwater or soil. [Industrial Applicability]

[0051] The present invention can be applied to a technology for rehabilitating existing buried pipes, such as aged sewer pipes. [Explanation of symbols]

[0052] 1 Existing pipes 9 Rehabilitation pipe 9a Inner wall of pipe 9b Pipe wall on the outer periphery 9c Inner circumference seam 9d Outer circumference seam 10 Belt-shaped member 10B~10G Belt-shaped members 11 Bottom plate part 11e Other end in width direction 12 Lid plate part 12f One end in the width direction 12g split groove 13 First fitting part 13a First fitting groove 13b First fitting groove 13d First fitting protrusion 14 Second fitting part 14b Second fitting protrusion 14d 2nd fitting groove 15 Vertical plate section 15c groove 15d Vertical plate part 17 Positioning protrusion 19 Hollow part 20 Filling material 31 Outer pinch roller 33A~33F Fins

Claims

1. A belt-shaped member for rehabilitating an existing pipe, made of synthetic resin, constituting a spiral-shaped rehabilitation pipe that is lined on the inner circumference of an existing pipe, a bottom plate portion constituting a pipe wall portion on an inner periphery side of the rehabilitating pipe; a cover plate portion that covers an outer circumferential side of the bottom plate portion and constitutes a pipe wall portion on an outer circumferential side of the rehabilitating pipe; a first fitting portion provided at one end in a width direction of the bottom plate portion, the first fitting portion having a first fitting groove opening to an inner circumferential side or a first fitting protrusion protruding to an inner circumferential side; a second fitting portion having a second fitting protrusion protruding toward the outer periphery side or a second fitting groove opening toward the outer periphery side, which is provided at the other end in the width direction of the bottom plate portion, and in the rehabilitating pipe, the second fitting protrusion is fitted into the first fitting groove in a pipe diameter direction connecting the inner periphery side and the outer periphery side, or the second fitting groove is fitted into the first fitting protrusion in the pipe diameter direction, thereby fitting in a concave-convex manner with the first fitting portion; a plurality of vertical plate portions that connect the bottom plate portion or the first fitting portion and the cover plate portion and are arranged at intervals in the width direction; a plurality of hollow portions separated by the vertical plate portions are formed side by side in the width direction.

2. The other end of the bottom plate portion in the width direction extends beyond the cover plate portion, 2. The belt-shaped member according to claim 1, wherein the cover plate portion covers 80% or more of the width of the bottom plate portion excluding the other end portion from the outer periphery side.

3. 3. The belt-shaped member according to claim 1, wherein the cover plate portion is continuous across a plurality of vertical plate portions.

4. A belt-shaped member as described in claim 1 or 2, characterized in that the vertical plate portion in the middle of the width direction has two adjacent vertical plate portions, and a groove opening into the outer peripheral surface of the cover plate portion is formed between these vertical plate portions.

5. A belt-shaped member for rehabilitating an existing pipe, made of synthetic resin constituting a spiral tubular rehabilitation pipe that is lined on the inner circumference of an existing pipe, a bottom plate portion constituting a pipe wall portion on an inner periphery side of the rehabilitating pipe; a cover plate portion that covers an outer circumferential side of the bottom plate portion and constitutes a pipe wall portion on an outer circumferential side of the rehabilitating pipe; A first fitting portion provided at one end in a width direction of the bottom plate portion; a second fitting portion provided at the other end in the width direction of the bottom plate portion and fitted into the first fitting portion in the rehabilitation pipe; a plurality of vertical plate portions that connect the bottom plate portion or the first fitting portion and the cover plate portion and are arranged at intervals in the width direction; A plurality of hollow portions separated by the vertical plate portion are formed side by side in the width direction, A band-shaped member characterized in that the vertical plate portion in the middle of the width direction has two adjacent vertical plate portions, a groove opening onto the outer peripheral surface of the cover plate portion is formed between these vertical plate portions, and a filler is provided in the groove.

6. 6. The belt-shaped member according to claim 5, wherein the filler is elastically compressible toward the inner periphery.

7. A belt-shaped member described in any one of claims 1 to 6, characterized in that the other end portion in the width direction of the bottom plate portion extends from the cover plate portion, and a positioning protrusion is provided at the other end portion so as to protrude toward the outer periphery.

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