Pipe manufacturing device that renovates existing pipe and existing pipe renovation method

Abstract

The present invention pertains to a self-propelled pipe manufacturing device comprising a brake mechanism, wherein it is possible to smoothly manufacture a renovated pipe by mitigating the interference between the brake mechanism and an existing pipe.　The device longitudinal direction (LD) of a pipe manufacturing device (20) for renovating an existing pipe (1) is oriented toward the spiral winding direction of a spiral-shaped renovated pipe (9) comprising an elongated belt-like member (10) such that the pipe manufacturing device is disposed on the inner circumferential side of a stretched front end (9e) of the renovated pipe (9). A device body (21) is provided with a drive unit (30), which includes at least a pair of drive rollers (31, 32), and a tension type brake mechanism (40). As a result of a successive belt part (19) of an unfinished pipe of the belt-like member (10) being clamped by the drive rollers (31, 32) and being obliquely extruded toward the stretched front end (9e), the mutually facing edges of the successive belt part (19) and the stretched front end part (9e) are joined by recess-projection fitting, and the pipe manufacturing device (20) is propelled in a spiral winding direction. The pipe manufacture involves the diameter of the renovated pipe (9) being increased by causing braking force to be exerted with respect to propulsion as a result of the tension of the tension-type brake mechanism (40). The tension-type brake mechanism (40) includes: a brake shoe (41) that is pressed against the renovated pipe (9); a tension reaction force receiving part (62b) provided to the device main body (21); a tension receiving part (44) provided to the brake shoe (41); and a tension member (50) stretched between the tension reaction force receiving part (62b) and the tension receiving part (44) so as to be capable of being tensioned. The tension reaction force receiving part (62b) and the tension receiving part (44) are disposed so as to be separated from each othe

Description

Pipe manufacturing apparatus and method for rehabilitating existing pipes 【0001】 The present invention relates to a pipe manufacturing apparatus and an existing pipe rehabilitation method for rehabilitating existing pipes by manufacturing a spiral-shaped rehabilitation pipe along the inner circumference of the existing pipe, and more particularly to a so-called self-propelled pipe manufacturing apparatus that is propelled (self-propelled) along the spiral winding direction of the rehabilitation pipe during pipe manufacturing, and to an existing pipe rehabilitation method using the pipe manufacturing apparatus. 【0002】 A pipe rehabilitation method is known for rehabilitating aging sewer pipes and other existing pipes by using a pipe-making device to spirally wind a long strip-shaped member along the inner circumference of the existing pipe to produce a spiral-shaped rehabilitation pipe (see Patent Document 1, etc.). For example, Patent Document 1 discloses a small, self-propelled pipe-making device that is small relative to the diameter of the rehabilitation pipe. The pipe-making device comprises a device body positioned at the leading end of the extension of the rehabilitation pipe during pipe making, and at least one pair of drive rollers provided on the device body. The pair of drive rollers grip the trailing strip portion connected to the leading end of the extension of the strip-shaped member and push it toward the leading end of the extension, thereby extending the rehabilitation pipe during pipe making. The reaction force of the pushing propels the pipe-making device in the spiral winding direction (self-propelled). 【0003】 The pipe-making apparatus described in Patent Document 1 further includes a braking mechanism. The braking mechanism includes a brake shoe that generates braking force by rubbing against the inner circumferential surface of the extended leading end of the rehabilitated pipe, and a brake guide that receives braking force from the outer circumferential side (existing pipe side) of the extended leading end. By using the braking force provided by this braking mechanism to reduce the amount of propulsion of the pipe-making apparatus relative to the amount of material fed into the rehabilitated pipe from the trailing belt, the rehabilitated pipe can be manufactured in a way that expands its diameter and adheres it to the inner circumferential surface of the existing pipe. 【0004】 Japanese Patent Publication No. 2023-71364 【0005】In this type of pipe-making apparatus, the brake guide of the brake mechanism is inserted between the extended front end of the rehabilitated pipe and the existing pipe, and is inserted from the outer circumference into a locking groove, which is one of the outer grooves of the strip-shaped member constituting the rehabilitated pipe, and locked in place (see Figure 3 of the aforementioned Patent Document 1). Therefore, depending on the cross-sectional shape of the strip-shaped member, the brake guide may be positioned to protrude beyond the outer surface of the extended front end of the rehabilitated pipe towards the existing pipe, causing interference between the brake guide and the existing pipe, which can make pipe-making difficult. In view of these circumstances, the present invention aims to alleviate interference between the brake mechanism and the existing pipe in a self-propelled pipe-making apparatus equipped with a brake mechanism, thereby enabling smooth pipe-making of rehabilitated pipes. 【0006】 To solve the aforementioned problems, the present invention provides a pipe-making device for rehabilitating an existing pipe, which is positioned at the extended front end in the pipe axis direction of a spiral-shaped rehabilitation pipe formed by spirally winding a long strip-shaped member along the inner circumference of an existing pipe, and which joins the opposing edges of the trailing strip portion of the strip-shaped member connected to the rehabilitation pipe and the extended front end in a concave-concave fitting and propels in the spiral winding direction, comprising: a device body positioned on the inner circumference side of the extended front end with the device's longitudinal direction aligned with the spiral winding direction, the device's width direction aligned with the pipe axis direction, and the device's height direction aligned with the pipe diameter direction; and a drive unit provided on the device body having at least one pair of drive rollers, which grips the trailing strip portion with the drive rollers and pushes it diagonally toward the extended front end toward the rear side in the longitudinal direction of the device and toward the bottom side in the height direction of the device, thereby obtaining a pushing force for the joining and propulsion; The device comprises a bracing-type brake mechanism that generates a braking force against the propulsion by bracing, the bracing-type brake mechanism includes a brake shoe having a pressing portion that can be pressed against the inner circumferential surface of the portion to be pressed at the extended front end, a bracing reaction force receiving portion provided on the main body of the device, a bracing receiving portion provided on the brake shoe, and a bracing member that is braced between the bracing reaction force receiving portion and the bracing receiving portion, wherein the bracing reaction force receiving portion and the bracing receiving portion are spaced apart in the longitudinal direction of the device or in the spiral winding direction. 【0007】The bracing of the aforementioned bracing member causes the brake shoe to press against the inner circumferential surface of the extended leading end of the rehabilitated pipe. This generates a braking force against the propulsion of the pipe-making device, making the propulsion amount of the pipe-making device smaller than the amount of material fed into the rehabilitated pipe from the trailing section. As a result, the rehabilitated pipe can be manufactured in an expanded diameter so that it adheres to the inner circumferential surface of the existing pipe. The reaction force of the bracing is directly received by the bracing reaction force receiving section. Furthermore, the reaction force of the bracing is transmitted to the rehabilitated pipe or existing pipe by means of the pipe-making device, on the opposite side of the longitudinal direction from the bracing receiving section. Therefore, the rehabilitated pipe or existing pipe bears the reaction force of the bracing. This ensures that the braking force is reliably generated. Therefore, the brake guide that receives the pressed portion from the outer circumference can be omitted, or the brake guide can be positioned offset from the pressing portion of the brake shoe. This reduces interference between the brake mechanism and the existing pipe. Furthermore, the intermediate portion of the pipe-making apparatus in the longitudinal direction is slightly raised inward in the pipe diameter direction due to the bracing. Alternatively, the weight of the pipe-making apparatus is supported by the bracing. This reliably reduces interference between the brake mechanism and the existing pipe. As a result, the rehabilitated pipe can be manufactured smoothly. 【0008】 Preferably, the brake shoe is a single-acting brake shoe that presses against the object to be pressed against without any support other than the existing pipe on the outer circumference side of the object to be pressed against. In a bracing brake mechanism including the single-acting brake shoe, the brake guide is omitted, or the brake guide is positioned offset from the object to be pressed against the brake shoe in the longitudinal direction of the device. This makes it possible to avoid or mitigate interference between the brake mechanism and the existing pipe. By omitting the brake guide, interference between the brake mechanism and the existing pipe can be reliably prevented regardless of the cross-sectional shape of the strip member, and the rehabilitated pipe can be manufactured smoothly. 【0009】Preferably, the bracing brake mechanism further includes a brake guide that is locked from the outer circumference to a portion near the pressing portion at the extended front end. More preferably, the brake guide is positioned offset in the longitudinal direction of the device from the pressing portion of the brake shoe. This prevents only a specific portion (e.g., the tip) of the pressing portion of the brake shoe from making contact with the rehabilitating pipe. If a portion of the pressing portion of the brake shoe other than the specific portion tries to float inward in the diameter direction of the pipe, the portion of the extended front end of the rehabilitating pipe facing the portion other than the specific portion is deflected inward in the diameter direction by the brake guide, so that the rehabilitating pipe is pressed against the entire pressing portion of the brake shoe. As a result, braking force can be stably generated. 【0010】 Preferably, the bracing brake mechanism further includes a lifting roller that protrudes from the brake guide toward the forward extension in the width direction of the device and toward the bottom in the height direction of the device, and is capable of rolling on the inner circumference of the existing pipe. This allows the brake guide to be separated from the inner surface of the existing pipe. Therefore, interference between the brake guide and the existing pipe can be prevented. 【0011】 Preferably, the bracing member extends diagonally with respect to the longitudinal direction and the height direction of the device. This allows for a larger component of the bracing force applied to the pressed portion in the direction of the pipe diameter, thereby increasing the braking force. Furthermore, shortening the length of the brake shoe allows for a more compact and lightweight pipe-making device. 【0012】 Preferably, the width dimension of the pressing portion along the width direction of the device is equal to or greater than the helical pitch of the rehabilitation pipe, and the pressing portion straddles the winding portion at the foremost extension end of the rehabilitation pipe and the adjacent winding portion behind that extension. This allows for a more stable application of braking force. 【0013】Preferably, the pressing portion is made of a rubber pad. This increases the frictional resistance between the pressing portion and the portion being pressed against, thereby increasing the braking force. Therefore, even with a single-piston brake shoe that does not have a support on the outer circumference side of the portion being pressed against, the required braking force can be sufficiently obtained. 【0014】 Preferably, the pressing portion is made of an adhesive material. Examples of materials for the adhesive material include butyl rubber, silicone-based adhesives, acrylic-based adhesives, urethane-based adhesives, and other pressure-sensitive adhesives. This increases the frictional resistance between the pressing portion and the portion being pressed, thereby increasing the braking force. Therefore, even with a single-sided brake shoe that does not have a support on the outer circumference side of the portion being pressed, the required braking force can be sufficiently obtained. 【0015】 Preferably, irregularities are formed on the contact surface between the pressing portion and the portion being pressed. This increases the frictional resistance between the pressing portion and the portion being pressed, thereby increasing the braking force. Therefore, even with a single-piston brake shoe that does not have a support on the outer circumference side of the portion being pressed, the required braking force can be sufficiently obtained. 【0016】 Preferably, the bracing member extends along the longitudinal direction of the device. This makes it possible to reduce the height dimension of the pipe-making device in the height direction of the device. In this configuration, the direction of extension of the bracing member along the longitudinal direction of the device does not need to be strictly parallel to the longitudinal direction of the device, and may be slightly (for example, within about 30°) oblique to the longitudinal direction of the device. 【0017】 Preferably, the bracing member extends forward from the drive unit along the longitudinal direction of the device, and the brake shoe is provided at the forward-facing tip of the bracing member. This directs the bracing force of the bracing member to push the brake shoe forward. The reaction force of the bracing is directed opposite to the direction of propulsion of the pipe-making device. 【0018】Preferably, the device body includes a brake connecting portion that rotatably connects the brake shoe around a connecting shaft along the width direction of the device, and the brake shoe includes a brake plate that cantileverably extends from the brake connecting portion toward the forward propulsion side in the longitudinal direction of the device. Preferably, the brake plate is provided with the pressing portion. The bracing of the bracing member causes the brake plate to rotate around the connecting shaft. When braced, the device body and the brake plate can be restrained so that the device body does not separate from the brake plate. Therefore, the reaction force of the bracing can be reliably obtained. In addition, the amount of bracing of the bracing member and the amount of rotational displacement of the brake plate are correlated so that the brake plate does not rotate freely. 【0019】 Preferably, the brake plate is curved in an arc shape with a curvature corresponding to the diameter of the rehabilitated pipe. More preferably, the radius of curvature of the brake plate is equal to the radius of the rehabilitated pipe. This ensures that the brake plate makes surface contact with a wide area of ​​the inner surface of the rehabilitated pipe, thereby reliably generating braking force. 【0020】 Preferably, the bracing member includes a turnbuckle. By tightening or loosening the turnbuckle to extend or retract it, the bracing force of the brake shoe and thus the braking force can be adjusted. Using a turnbuckle improves the workability of adjusting the braking force. Preferably, the turnbuckle is equipped with a torque wrench for managing the tightening torque for bracing. Preferably, the torque wrench is a ratchet-type torque wrench that regulates the tightening torque so that it does not exceed a certain level. 【0021】 Preferably, the bracing brake mechanism includes one or more regulating guides that are positioned at the outermost edge of the extended front end. By regulating the deviation of the bracing brake mechanism with the regulating guides, the orientation and posture of the pipe-making device can be maintained. In particular, it is possible to prevent the pipe-making device from derailing towards the rear of the extension due to tension from the trailing belt or the like. 【0022】Preferably, the regulating guide includes a rotating body that can rotate around a rotation axis along the device width direction perpendicular to the device longitudinal direction, with the rear side of the rotating body facing the outermost edge. The rotating body contacts the outermost edge of the extended front end of the rehabilitated pipe, preventing the pipe-making device from derailing towards the extended rear. Furthermore, if there is an obstacle such as a step on the inner surface of the existing pipe, the rotating body can roll over the obstacle, preventing any hindrance to the advancement of the pipe-making device. 【0023】 Preferably, a regulating guide is provided on the side of the brake plate that extends forward in the width direction of the device, and is positioned against the outermost edge of the extended front end. This makes it possible to more reliably prevent derailment of the pipe-making device. 【0024】 Generally, existing pipes such as sewer pipes have a structure in which multiple pipe bodies, such as Hume pipes, are connected in a line. In aging existing pipes, the pipe axes of adjacent pipe bodies may be misaligned, and steps may be formed at the joints between these pipe bodies. When manufacturing a rehabilitated pipe along the inner circumference of such an existing pipe, it is necessary to change the braking force of the pipe manufacturing device before and after the joint to reduce or increase the diameter of the rehabilitated pipe in order to avoid interference between the pipe manufacturing device and the steps at the joint. However, conventional brake adjustments were complicated and time-consuming. Specifically, a tool such as a wrench had to be taken out of the toolbox, fitted onto the brake adjustment nut of the brake mechanism, and the nut turned by operating the tool to change the braking force. After that, the tool had to be removed from the nut and put back in the toolbox. This procedure had to be repeated every time the brake force setting needed to be changed. In addition, actual work sites are often narrow or dark, making it difficult to work, and each brake adjustment took several minutes. A large number of joints in existing pipes meant that changing the braking force settings took more time, which led to a decrease in the efficiency of rehabilitation work. 【0025】Preferably, in a pipe-making apparatus equipped with a tension-type brake mechanism according to the present invention, the tension-type brake mechanism further includes a permanent adjustment tool that is detachably attached to the tension member and adjusts the tensioning force of the tension member. Detachability means that in order to attach or detach the adjustment tool from the tension member, at least a part of the pipe-making apparatus including the tension member must be disassembled or taken apart, and the adjustment tool cannot be attached or detached independently. With a pipe-making apparatus equipped with such a permanent adjustment tool, for example, before and after joints in existing pipes, the tensioning force of the tension member can be adjusted with the adjustment tool to change the braking force of the brake shoe, thereby expanding or contracting the pipe diameter of the rehabilitated pipe and avoiding interference between the pipe-making apparatus and the steps of the joints. Since the adjustment tool is permanently attached to the tension member, the braking force can be changed quickly, and the working time can be shortened compared to using a temporary tool such as a wrench. Therefore, the work efficiency of adjusting the brakes to expand or contract the diameter of the rehabilitated pipe before and after joints in the existing pipe can be improved. Since the work time can be reduced by the number of joints in the existing pipe, the cumulative work time for adjusting the braking force of the entire existing pipe can be significantly reduced. As a result, the rehabilitation construction time for the rehabilitated pipe can be sufficiently reduced, and the work rate for rehabilitation construction can be improved. 【0026】 Preferably, the bracing member includes a shaft extending to connect the device body and the brake shoe, and a bracing part provided on the shaft that generates the bracing force by rotational torque, and the adjustment tool includes an engagement part that is irremovably engaged with the bracing part, and an operating lever that inputs rotational torque to the bracing part via the engagement part. The adjustment tool is irremovably attached to the bracing member by the engagement part of the adjustment tool being irremovably engaged with the bracing part. The brake force can be adjusted by adjusting the bracing force by operating the operating lever. 【0027】Preferably, the shaft includes a male threaded portion, the bracing portion includes a bracing nut screwed onto the male threaded portion, and the engaging portion includes a cylindrical socket through which the shaft is inserted so as to be rotatable relative to the bracing nut and fitted to the outer circumference of the bracing nut so as not to be rotatable relative to the shaft. To attach or detach the adjustment tool, it is necessary, for example, to separate the shaft of the bracing member from the main body of the device, making it impossible to attach or detach the adjustment tool. 【0028】 Preferably, a detachable extension lever is provided at the tip of the operating lever. By connecting the extension lever to the operating lever, the rotational torque applied to the bracing part can be increased. Alternatively, the operating lever can be shortened to prevent the adjustment tool from interfering with other parts of the pipe-making apparatus or the trailing band portion of the strip member when not in use. 【0029】 Preferably, the adjustment tool includes a switching mechanism that allows input of rotational torque to the bracing part in the effective direction selected from the rotational direction that braces the bracing member and the rotational direction that releases the bracing, and allows the operating lever to rotate freely in the free-spinning direction of the two rotational directions that were not selected. When changing the setting of the braking force, the effective direction is selected by the switching mechanism, and then the operating lever is moved back and forth in the effective direction and the free-spinning direction. The braking force can be increased or decreased by operating in the effective direction. The operating lever can be returned to the starting point of the rotational stroke in the effective direction by operating in the free-spinning direction. 【0030】 Preferably, the switching mechanism is used to select the operating lever so that the direction of the rotational moment due to the operating lever's own weight is in the effective direction, depending on the position of the pipe-making device in the circumferential direction of the pipe end. In particular, when the pipe-making device is located at the top of the pipe, the direction of the rotational moment due to the operating lever's own weight is in the effective direction. This prevents the operating lever from spinning freely and sagging due to its own weight. Normally, the rotational moment due to the operating lever's own weight is smaller than the rotational torque required to rotate the bracing part, so the bracing part does not rotate in the effective direction due to the operating lever's own weight and the braking force does not change. 【0031】Furthermore, the pipe manufacturing apparatus according to the present invention further comprises a bracing reaction force receiving connecting arm extending from the apparatus body to the pipe portion opposite in the circumferential direction of the rehabilitated pipe, the tip of the bracing reaction force receiving connecting arm is provided so as to be able to press against the pipe portion opposite, and the bracing member extends substantially along the pipe diameter direction so as to connect the bracing reaction force receiving portion and the bracing receiving portion. With this structure, the bracing reaction force can be reliably obtained by bracing the bracing member substantially in the pipe diameter direction, which causes the bracing reaction force receiving portion to press against the pipe portion opposite in the rehabilitated pipe. This ensures that braking force is reliably generated. Therefore, a brake guide can be omitted, and interference between the brake mechanism and the existing pipe can be mitigated. 【0032】 According to the present invention, in a self-propelled pipe-making apparatus equipped with a braking mechanism, interference between the braking mechanism and the existing pipe can be mitigated. This enables the smooth production of rehabilitated pipes. 【0033】FIG. 1 is a cross-sectional view along the pipe axis of an existing pipe during rehabilitation work by the pipe manufacturing apparatus according to the first embodiment of the present invention. FIG. 2 is a front cross-sectional view taken along line II-II of FIG. 1. FIG. 3 is a plan explanatory view of the pipe manufacturing apparatus taken along line III-III of FIG. 2. FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 2. FIG. 5 is a front view explanatorily showing the floating displacement due to the tension of the pipe manufacturing apparatus. FIG. 6 is a cross-sectional view along the pipe axis of an existing pipe during rehabilitation work by the pipe manufacturing apparatus according to the second embodiment of the present invention. FIG. 7 is a front view of the pipe manufacturing apparatus taken along line VII-VII of FIG. 6. FIG. 8 is a plan view of the pipe manufacturing apparatus taken along line VIII-VIII of FIG. 7. FIG. 9 is a cross-sectional view taken along line IX-IX of FIG. 7. FIG. 10 is a front view showing the state where the pipe manufacturing apparatus according to the second embodiment is located at the pipe top. FIG. 11(a) is a cross-sectional view taken along line XI-XI of FIG. 10. FIG. 11(b) is a cross-sectional view in a state where the operation lever is directed to the opposite side by 180 degrees. FIGS. 12(a) to 12(c) are cross-sectional views sequentially showing the state of manufacturing a pipe while adjusting the diameter of the rehabilitation pipe so that the pipe manufacturing apparatus according to the second embodiment passes through the step of the existing pipe. FIG. 13 is a front view of the pipe manufacturing apparatus according to the third embodiment of the present invention. FIG. 14 is a plan view of the pipe manufacturing apparatus according to the third embodiment. FIG. 15 is a front view of the tension type brake mechanism of the pipe manufacturing apparatus according to the third embodiment. FIG. 16 is a cross-sectional view taken along line XVI-XVI of FIG. 15. FIG. 17 is a cross-sectional view taken along line XVII-XVII of FIG. 15. FIG. 18 is a cross-sectional view showing a modified example of the pressing portion of the brake shoe of the tension type brake mechanism according to the third embodiment. FIG. 19(a) is a front view showing the tension state by the tension type brake mechanism in the third embodiment. FIG. 19(b) is a front view showing the tension state in the case where it is assumed that there is no brake guide of the tension type brake mechanism in FIG. 19(a). FIG. 20 is an explanatory front view of the pipe manufacturing apparatus according to the fourth embodiment of the present invention. FIG. 21 is a cross-sectional view along the pipe axis of an existing pipe during rehabilitation work by the pipe manufacturing apparatus according to the fifth embodiment of the present invention. 【0034】Hereinafter, embodiments of the present invention will be described with reference to the drawings. <First Embodiment (Figs. 1 to 4)> As shown in Fig. 1, an existing pipe 1 is rehabilitated by lining a rehabilitation pipe 9 along the inner circumference of the aged existing pipe 1. The existing pipe 1 to be rehabilitated is, for example, a sewer pipe buried underground, but the present invention is not limited to this, and it may be a water supply pipe, an agricultural water pipe, a gas pipe, a water conduit for hydroelectric power generation, a tunnel, or the like. 【0035】 As shown in Figs. 1 and 2, the rehabilitation pipe 9 is, for example, a spiral pipe formed by spirally winding a long strip-shaped member 10 (profile) made of a synthetic resin such as polyvinyl chloride. As shown in Fig. 4, the strip-shaped member 10 integrally has a flat strip-shaped base portion 11, a plurality of ribs 12, and male and female fitting portions 13, 14, and extends long in the strip length direction. A plurality of ribs 12 are provided on the strip base portion 11 at intervals in the strip width direction (the left-right direction in Fig. 4). The ribs 12 project from the strip base portion 11 toward the outer peripheral side (the outer side in the pipe diameter direction of the rehabilitation pipe 9, the lower side in Fig. 4). Inside the rib 12, a reinforcing strip plate 16 made of metal such as steel is embedded. The cross-sectional shape of the strip-shaped member 10 is not limited to the illustrated one, and various modifications can be made. The reinforcing strip plate 16 may be omitted. The metal reinforcing strip plate may be formed in a deformed cross-section and fitted to the outer peripheral portion of the synthetic resin strip-shaped member 10. 【0036】 As shown in Fig. 4, a female fitting portion 13 is continuous with one end portion (the left side portion in Fig. 4) in the strip width direction of the strip base portion 11. The female fitting portion 13 has a substantially V-shaped cross-sectional shape having a fitting groove 13a and bulges to the outer peripheral side (the lower side in Fig. 4) to substantially the same height as the rib 12. The raised end 13e of the female fitting portion 13 to the outer peripheral side and the protruding end 12e of the rib 12 to the outer peripheral side are arranged at substantially the same height along the strip thickness direction (the up-down direction in Fig. 4) of the strip-shaped member 10. The fitting groove 13a is opened to the inner peripheral side (the upper side in Fig. 4) of the strip-shaped member 10. 【0037】 As shown in Fig. 4, a male fitting portion 14 is formed at the other end portion (the right side portion in Fig. 4) in the strip width direction of the strip base portion 11. The male fitting portion 14 is in a protruding shape that protrudes from the strip base portion 11 toward the outer peripheral side. 【0038】As shown in Figure 4, an outer circumferential groove 15 is formed between adjacent ribs 12 and between the female fitting portion 13 and the rib 12A immediately adjacent to it. The outer circumferential groove 15 opens outwards (downwards in Figure 4). The outer circumferential groove between the female fitting portion 13 and the rib 12A constitutes a locking groove 15A. The outer circumferential opening 15e of the locking groove 15A is formed by the outer circumferential raised end 13e of the female fitting portion 13 and the outer circumferential protruding end 12e of the rib 12A. 【0039】 As shown in Figures 1 and 4, in the rehabilitation pipe 9, the strip-shaped member 10 is wound in a spiral shape, and adjacent fitting portions 13 and 14 that are one full turn apart are joined by a concave-concave fitting. The male fitting portion 14 is fitted into the fitting groove 13a. 【0040】 As shown in Figures 1 and 2, the pipe axis L of the rehabilitated pipe 9 (the pipe portion manufactured prior to the strip-shaped member 10) during the pipe manufacturing process. ９ A pipe-making device 20 for rehabilitating an existing pipe is positioned in a portion 9e (hereinafter referred to as the "extended front end portion 9e") of approximately one to two turns along the pipe axis direction (the direction perpendicular to the plane of the paper in Figure 2) on the extended front end side. The pipe-making device 20 is a self-propelled pipe-making device that propels itself along the inner circumference of the existing pipe 1 in a counterclockwise spiral winding direction in Figure 2 while manufacturing the rehabilitated pipe 9. 【0041】As shown in Figures 2 and 3, the pipe-making apparatus 20 comprises an apparatus body 21, a drive unit 30, and a brake mechanism 40. The apparatus body 21 has a housing 22, an inner circumference guide arm 23, an outer circumference guide plate 24, and a brake connecting part 60, and is positioned to be movable in the spiral winding direction on the inner circumference side (the front side of the paper in Figure 3) of the extended front end 9e of the rehabilitated pipe 9. The longitudinal direction of the apparatus body 21 and thus the longitudinal direction of the pipe-making apparatus 20 (hereinafter referred to as "apparatus longitudinal direction LD") is oriented in the spiral winding direction. The length of the apparatus body 21 along the apparatus longitudinal direction LD is about a fraction to a tens of percent of the circumference of the rehabilitated pipe 9. The pipe-making apparatus 20 has a non-inner circumference restricting structure that does not have an inner circumference restricting body such as a link roller that restricts the pipe end 9e from the inner circumference side, and the pipe end 9e other than the part where the pipe-making apparatus 20 is positioned is open to the inner circumference side (inward in the pipe diameter direction). In Figure 3, for illustrative purposes, the spiral winding direction of the rehabilitated pipe 9 and the longitudinal direction LD of the pipe-making device 20 are shown to be perpendicular to the pipe axis direction (up and down direction in the figure). However, in reality, they are tilted downward to the right in Figure 3 by the lead angle of the spiral relative to the pipe axis direction. 【0042】 As shown in Figures 2 and 3, the housing 22 is positioned approximately in the center of the longitudinal direction LD of the device body 21. A drive unit 30 is provided in the housing 22. The drive unit 30 has at least one pair of drive rollers 31 and 32 and a drive motor 33. The drive rollers 31 and 32 are housed in the housing 22. The drive motor 33 is mounted on the side of the housing 22. 【0043】 The axes of the drive rollers 31 and 32 are oriented in the width direction of the pipe-making apparatus 20 (hereinafter referred to as "apparatus width direction WD"). The apparatus width direction WD is perpendicular to the apparatus longitudinal direction LD and is substantially aligned with the pipe axis or extension direction ED (Figure 1) of the rehabilitated pipe 9. More precisely, the apparatus width direction WD is inclined by the helical lead angle of the rehabilitated pipe 9 with respect to the pipe axis or the extension direction ED parallel thereto. The pair of drive rollers 31 and 32 face each other in the height direction of the pipe-making apparatus 20 (hereinafter referred to as "apparatus height direction HD"). The apparatus height direction HD is oriented in the pipe diameter direction of the rehabilitated pipe 9. 【0044】As shown in Figure 2, the trailing strip portion 19 of the strip-shaped member 10, which is connected to the extended front end 9e of the rehabilitated pipe 9, is introduced between a pair of drive rollers 31 and 32 and is clamped between these drive rollers 31 and 32. The drive unit 30 provides a pushing force that pushes the trailing strip portion 19 diagonally toward the joining action portion 9c on the extended front end 9e. The pushing force is directed from the drive unit 30 toward the rear of the device in the longitudinal direction LD (clockwise in Figure 2) and toward the bottom of the device in the height direction HD (outer circumference in the pipe diameter direction). This pushing force causes the joining of the fitting portions 13 and 14 between the trailing strip portion 19 and the extended front end 9e, and the pipe-making device 20 to be pushed toward the front of the device in the longitudinal direction LD (counterclockwise in Figure 2). 【0045】 A pipe end guide 25 is provided at the bottom of the housing 22. Although detailed illustrations are omitted, the locking claws of the pipe end guide 25 are slidably fitted into the locking groove 15 of the extended front end 9e of the rehabilitation pipe 9 in the spiral winding direction. 【0046】 As shown in Figure 2, the inner circumference guide arm 23 and the outer circumference guide plate 24 extend from the housing 22 toward the rearward direction (clockwise in Figure 2) along the longitudinal direction LD of the device. The inner circumference guide arm 23 has a double-arm structure that runs along the inner circumference side of the trailing belt portion 19a from the housing 22 to the joining portion 9c in the trailing belt portion 19. 【0047】 The outer peripheral guide plate 24 is formed in a roughly arc shape and supports the trailing band portion 19a and the extended front end portion 9e from the outer peripheral side in the diameter direction of the pipe. Although detailed illustrations are omitted, the inner peripheral side of the outer peripheral guide plate 24 has protrusions that fit into the outer peripheral grooves 15 of the trailing band portion 19a and the extended front end portion 9e so as to be slidable in the spiral winding direction. 【0048】As shown in Figures 2 and 3, a brake coupling portion 60 is provided on the forward side of the housing 22 (counterclockwise side in Figure 2). The brake coupling portion 60 includes a bottom arm 61, a coupling plate 62, and a coupling frame 63. The bottom arm 61 is fixed to the center of the bottom (lower side in Figure 2) of the housing 22 in the device height direction HD, and extends from there toward the forward side of the propulsion. As shown in Figure 3, a bifurcated clamping portion 61a is formed at the tip of the bottom arm 61 that faces toward the forward side of the propulsion. 【0049】 As shown in Figure 2, the connecting plate 62 includes a mounting portion 62a, a bracing reaction force receiving portion 62b, and a mounting portion 62c. The mounting portion 62a is connected to and fixed to the housing 22. The bracing reaction force receiving portion 62b protrudes from the housing 22 toward the forward side (right side in Figure 2). The mounting portion 62c protrudes from the mounting portion 62a toward the bottom side (downward side in Figure 2) in the device height direction HD. 【0050】 As shown in Figure 2, the connecting frame 63 extends from the bottom arm 61 and the connecting plate 62 toward the forward side of the device in the longitudinal direction LD (right side in Figure 2). As shown in Figure 3, the connecting frame 63 is formed in a roughly rectangular frame shape when viewed from the device height direction HD. The side plate portion 63a on the extended forward side (lower side in Figure 3) of the connecting frame 63 is connected to the mounting portion 62c of the connecting plate 62. Furthermore, the L-shaped end portion 63b on the rearward side of the side plate portion 63a (left side in Figure 3) is sandwiched between the clamping portion 61a of the bottom arm 61. In this way, the connecting frame 63 is fixed and reinforced so as to be constrained by the device height direction HD and the device longitudinal direction LD relative to the bottom arm 61 and the connecting plate 62. 【0051】 As shown in Figures 2 and 3, a connecting shaft 63c is provided at the tip of the connecting frame 63 facing forward (right end in Figure 2). The axis of the connecting shaft 63c is oriented in the device width direction WD. 【0052】As shown in Figures 2 and 3, the pipe body 21 is provided with a tension-type brake mechanism 40. Preferably, the tension-type brake mechanism 40 is located on the forward side of the pipe body 21 in the longitudinal direction LD of the device (right side in Figure 3). The brake mechanism 40 includes a brake shoe 41 and a tension member 50. 【0053】 As shown in Figures 2 and 3, a brake shoe 41 is provided on the forward side of the pipe-making apparatus 20 (right side in Figure 3). The brake shoe 41 is positioned away from the drive rollers 31 and 32 of the drive unit 30 towards the forward side of the apparatus in the longitudinal direction LD (right side in Figure 2). The brake shoe 41 has a brake plate 42 and a longitudinal rib plate 43. 【0054】 As shown in Figure 2, the brake plate 42 is formed as a long plate that extends in the longitudinal direction LD of the device and is curved in an arc. The curvature of the brake plate 42 corresponds to the diameter of the rehabilitated pipe 9. Preferably, the radius of curvature of the brake plate 42 is about the same as the radius of the extended front end 9e. The longitudinal dimension of the brake plate 42 along the longitudinal direction LD of the device is preferably one-tenth to one-several-tenths of the circumference of the rehabilitated pipe 9. As shown in Figure 3, the width dimension of the brake plate 42 along the width direction WD of the device is preferably the helical pitch P of the helical pipe 9. ９ The size is approximately equal to or greater than the effective width dimension of the strip-shaped member 10, or it spans two adjacent winding portions 9a and 9b of the rehabilitated pipe 9. This prevents the balance of the pipe manufacturing device 20 from being disrupted. As shown in Figure 4, preferably, the brake plate 42 spans the first winding portion 9a (the foremost extension end) at the extended front end 9e of the rehabilitated pipe 9 and the second winding portion 9b adjacent to it behind the extension. The second winding portion 9b is more stable than the first winding portion 9a and is less likely to deform even when subjected to external forces. 【0055】As shown in Figures 2 and 4, the brake plate 42 of the brake shoe 41 is in contact with or close to the inner circumferential surface of a portion 9eb (hereinafter appropriately referred to as "the part to be pressed against 9eb") of the extended front end 9e of the rehabilitation pipe 9, so as to be able to press against it. The outer circumferential surface of the brake plate 42 constitutes the pressing portion against the part to be pressed against 9eb. A rubber pad may be provided on the outer circumferential surface (pressing portion) of the brake plate 42 (see Figure 17). Irregularities may be formed on the outer circumferential surface (pressing portion) of the brake plate 42 (see Figure 18). The outer circumferential surface (pressing portion) of the brake plate 42 may be made of an adhesive material. The brake plate 42 is a single-acting brake shoe that is pressed against the inner circumferential surface of the part to be pressed against 9eb without any support other than the existing pipe 1 from the outer circumferential side of the part to be pressed against 9eb. The pipe manufacturing apparatus 20 is not provided with a brake receiver with a locking claw (see Patent Document 1) that faces the brake shoe 41 and receives the extended front end 9e from the outer circumferential side. 【0056】 As shown in Figures 2 and 3, a pair of vertical rib plates 43 are provided on the front surface of the brake plate 42 facing the inner circumference of the rehabilitation pipe 9 (the surface on the near side of the paper in Figure 3), arranged in the width direction WD of the device. Each vertical rib plate 43 extends in the longitudinal direction LD of the device. 【0057】 As shown in Figures 2 and 3, a base-shaped bracing support portion 44 is provided in the middle of the brake shoe 41. The bracing support portion 44 is spanned across a pair of vertical rib plates 43. The bracing support portion 44 is separated from the bracing reaction force support portion 62b toward the forward propulsion side (right side in Figure 2) in the longitudinal direction LD (helical winding direction) of the device. Therefore, the bracing support portion 44 and the bracing reaction force support portion 62b are spaced apart in the longitudinal direction LD of the device. 【0058】 As shown in Figures 2 and 3, the bracing member 50 is stretched between the bracing reaction force receiving portion 62b and the bracing receiving portion 44 so as to be able to brace itself. Consequently, the bracing member 50 is stretched between the device body 21 and the brake shoe 41. The bracing member 50 extends forward from the drive unit 30 (to the right in Figure 2) along the longitudinal direction LD of the device and is connected to the brake shoe 41. 【0059】The forward-facing tip of the bracing member 50 (the rightmost end in Figure 2) is connected to the bracing support portion 44. The bracing member 50 is rotatable around an axis along the device width direction WD relative to the bracing support portion 44. 【0060】 The rear end of the bracing member 50 (the left end in Figure 3) is connected to the bracing reaction force receiving portion 62b. The bracing member 50 is rotatable around an axis along the device width direction WD relative to the bracing reaction force receiving portion 62b. 【0061】 As shown in Figures 2 and 3, preferably, the tensioning member 50 includes one or more (in this case, two) turnbuckles 51. The multiple (two) turnbuckles 51 are arranged parallel to the device width direction WD. By tightening the turnbuckles 51 in the extension direction, the tensioning member 50 is expanded (extended). By loosening the turnbuckles 51 in the contraction direction, the tensioning member 50 is contracted. Preferably, the turnbuckles 51 are equipped with a ratchet-type torque wrench 52 (adjustment tool) for tightening / loosening (extension / contraction) operations and tightening torque management. 【0062】 As shown in Figures 2 and 3, the rearward end (left end in Figure 2) of the pair of longitudinal rib plates 43 of the brake shoe 41 is rotatably connected to the connecting shaft 63c. This allows the brake shoe 41 to rotate so as to be tilted up and down about the connecting shaft 63c. As shown in Figure 2, the brake plate 42 of the brake shoe 41 extends cantilevered from the connecting frame 63 toward the forward side of the device in the longitudinal direction LD (right side in Figure 2). 【0063】 As shown in Figure 3, the connecting frame 63 and brake shoe 41 are positioned offset to the rearward side (upward in Figure 3) relative to the housing 22 and drive rollers 31 and 32. The amount of offset is equal to the helical pitch P of the helical tube 9. ９ This corresponds to: 【0064】As shown in Figures 2 and 3, preferably, the bracing brake mechanism 40 further includes one or more (in this case, two) restricting guides 71, 72. The restricting guide 71 is provided on the brake shoe 41. Preferably, the restricting guide 71 is positioned on the brake shoe 41 on the forward side of the device in the longitudinal direction LD (right side in Figure 3) and on the extended forward side of the device in the width direction WD (lower side in Figure 3) from the bracing receiving portion 44. More preferably, the restricting guide 71 is positioned on the tip portion (right end in Figure 3) or the edge portion on the extended forward side (lower side in Figure 3) near the tip portion (right end in Figure 3) of the brake plate 42 facing the forward side of the device. 【0065】 The regulating guide 72 is provided on the connecting frame 63 of the brake coupling portion 60. Preferably, the regulating guide 72 is located near the connecting shaft 63c (the coupling portion with the brake shoe 41) on the connecting frame 63. The regulating guide 72 may also be provided on the rearward side of the brake shoe 41 (the left side in Figure 3). Two (or more) regulating guides 71, 72 are arranged side by side, spaced apart from each other in the longitudinal direction LD of the device. 【0066】 As shown in Figures 2 and 3, each regulating guide 71, 72 includes a rotating body 73 that is rotatable about a rotation axis along the width direction WD of the device. The rotating body 73 includes a cylindrical portion 73a and a tapered portion 73b. The tapered portion 73b protrudes from the cylindrical portion 73a, becoming smaller in diameter toward the forward extension side. The rotating body 73 of the regulating guide 71 on the forward propulsion side is larger than the rotating body 74 of the regulating guide 72 on the rearward propulsion side. 【0067】 As shown in Figures 3 and 4, each regulating guide 71, 72 is positioned against the outermost edge 9ea created by the female fitting portion 13 of the extended front end 9e of the rehabilitation pipe 9. Preferably, the back surface 73d of the extended rear side (right side in Figure 4) of the rotating body 73 of each regulating guide 71, 72 is positioned against the outermost edge 9ea. 【0068】The rehabilitated pipe 9 is manufactured by the aforementioned pipe manufacturing apparatus 20 in the following manner. As shown in Figure 1, the trailing strip portion 19 of the unmanufactured pipe of the strip-shaped member 10 is unfed from the discharge drum 6 on the ground, passes through the manhole 4, is passed inside the manufactured rehabilitated pipe 9 inside the existing pipe 1, and is sent to the pipe manufacturing apparatus 20 at the extended leading end 9e. 【0069】 As shown in Figure 2, the trailing strip portion 19 is introduced between the drive rollers 31 and 32 of the drive unit 30, and is pushed out diagonally toward the jointing action portion 9c toward the rearward side in the longitudinal direction LD of the device and toward the bottom side in the height direction HD of the device (outward in the diameter direction of the rehabilitated pipe 9) by the rotational drive of the drive rollers 31 and 32. The male fitting portion 14 of the extruded portion 19a of the trailing strip portion 19 is pressed into the fitting groove 13a of the female fitting portion 13 in the jointing action portion 9c of the extended front end portion 9e, and a recessed-protrusion fitting is performed (see the dashed-dotted arrow a in Figure 4). As a result, the opposing edges of the trailing strip portion 19 and the extended front end portion 9e are joined together. As a result, the trailing strip portion 19 is incorporated into the rehabilitated pipe 9, the pipe manufacturing of the rehabilitated pipe 9 progresses, and the rehabilitated pipe 9 is extended toward the forward side in the extension direction ED (pipe axis direction) (to the right in Figure 1). Furthermore, a propulsion reaction force is generated against the extrusion of the trailing belt section 19 by the drive unit 30, causing the pipe-making device 20 to be propelled (self-propelled) forward (counterclockwise in Figure 2). 【0070】 This type of strip-shaped member 10 for rehabilitated pipes has a diameter reduction characteristic, which decreases in diameter as it is formed into a spiral tube. Therefore, preferably, during pipe formation, a braking mechanism 40 is used to apply a predetermined braking force to the propulsion of the pipe-forming device 20. Specifically, the turnbuckle 51 is tightened in the extension direction to brace the bracing member 50. Then, the component of the bracing force of the bracing member 50 in the pipe diameter direction causes the brake shoe 41 to press against the inner circumferential surface of the rehabilitated pipe 9. More specifically, the brake plate 42 is pressed against the inner circumferential surface of the extended front end 9e such that it is rotated outward in the pipe diameter direction of the rehabilitated pipe 9 around the connecting shaft 6. Since the brake plate 42 is curved to a curvature corresponding to the pipe diameter of the rehabilitated pipe 9, it makes surface contact with a wide area of ​​the inner circumferential surface of the rehabilitated pipe 9. 【0071】As a result, as the pipe-making device 20 is advanced, the brake shoe 41 rubs against the inner surface of the rehabilitated pipe 9, generating sliding friction and applying a braking force to the pipe-making device 20. This braking force causes the amount of feed of the trailing strip 19 by the drive unit 30 to become greater than the amount of advancement by the pipe-making device 20, suppressing the reduction in diameter of the rehabilitated pipe 9 and further expanding its diameter during manufacturing. This allows the rehabilitated pipe 9 to be manufactured so that it fits snugly around the entire inner circumference of the existing pipe 1. By adjusting the tightening amount of the turnbuckle 51, the tensioning force of the bracing member 50 and thus the braking force can be increased or decreased. The ratchet-type torque wrench 52 can be used to control the tightening torque of the turnbuckle 51 so that it does not become excessive. By loosening the turnbuckle 51 and reducing the tensioning force of the bracing member 50, the braking force decreases, and the rehabilitated pipe 9 is manufactured with a reduced diameter. In this way, the pipe diameter can be controlled. 【0072】 The portion 9eb that is pressed against the existing pipe 1 at the extended front end 9e of the rehabilitated pipe 9 is deformed to bulge outward in the radial direction of the pipe (downward in Figure 4) and pressed against the existing pipe 1. There is no outer peripheral support other than the existing pipe 1 that receives the pressed portion 9eb from the outer peripheral side. In the pipe manufacturing apparatus 20, brake guides and other outer peripheral supports that receive the brake shoe 41 from the outer peripheral side (downward in Figure 4) of the rehabilitated pipe 9 are omitted. Therefore, regardless of the cross-sectional shape of the strip-shaped member 10, interference between the brake mechanism 40 and the existing pipe 1 can be avoided. Specifically, as shown in Figure 4, even if the raised end 13e of the female fitting portion 13 is raised to approximately the same height as the protruding end 12e of the rib 12A, there is no brake guide G (outer peripheral support) that passes between the raised end 13e and the existing pipe 1 and fits into the locking groove 15A, as shown by the dashed line in the figure, so interference between the brake guide G and the existing pipe 1 cannot occur. This allows for the smooth manufacture of rehabilitated pipes. 【0073】The reaction force of the bracing member 50 is directly received by the device body 21, including the connecting plate 62. Furthermore, the reaction force of the bracing is transferred from the tip 24d of the outer peripheral guide plate 24 to the existing pipe 1. Therefore, the existing pipe 1 bears the reaction force of the bracing. Alternatively, the reaction force may be transferred from the tip of the inner peripheral guide arm 23 to the rehabilitated pipe 9, so that the rehabilitated pipe 9 bears the reaction force of the bracing. This ensures that the reaction force of the bracing is reliably obtained. The bracing force from the bracing member 50 is directed to push the brake shoe 41 forward (to the right in Figure 2) along the longitudinal direction LD of the device, so that the reaction force of the bracing can be taken opposite to the propulsion direction of the pipe manufacturing device 20. Therefore, the braking force due to the bracing can be reliably generated. As a result, the brake guide that receives the pressed portion 9eb from the outer peripheral side can be omitted. In other words, the required braking force can be obtained even without a brake guide. 【0074】 Furthermore, as shown by the solid line in Figure 5, the pipe-making device 20 is slightly lifted inward in the pipe diameter direction by the tension along the longitudinal direction LD of the device, compared to when the device body 21 is not tensioned (dotted line in Figure 5). Consequently, the pipe end guide 25 floats together with the device body 21, elastically bending the locked portion 9f of the rehabilitated pipe 9 inward in the pipe diameter direction. This reduces interference between the pipe end guide 25 and the existing pipe 1. Note that in Figure 5, the amount of floating displacement of the pipe-making device 20 and the amount of bending deformation of the locked portion 9f are exaggerated. The locked portion 9f moves in the spiral winding direction as the pipe-making device 20 is propelled. After the pipe end guide 25 passes, the rehabilitated pipe 9 elastically returns to its pre-deformation state. 【0075】If the bracing member were positioned so as to extend in the height direction HD of the device, either in the center of the device's longitudinal direction or near the drive unit 30, the bracing force along the height direction HD could cause the device's body 21 to float significantly upwards in the height direction HD, potentially preventing the bracing reaction force from being obtained. Furthermore, when the pipe-making device 20 is located at the top of the existing pipe 1, the pipe-making device 20 tends to descend under its own weight, and if the bracing direction is directed towards the height direction HD (inward in the pipe diameter direction), there is a risk that the bracing reaction force will not be obtained. 【0076】 Furthermore, by pressing the brake plate 42 across the first winding portion 9a and the second winding portion 9b (Figure 4), a stable braking force can be applied. 【0077】 Furthermore, in the pipe-making apparatus 20, the brake shoe 41 is rotatably connected to the apparatus body 21 via the brake coupling portion 60, thereby restricting the free rotation of the bracing member 50 and the brake shoe 41. The amount of tension applied by the bracing member 50 correlates with the rotational displacement of the bracing member 50 and the brake shoe 41. When tension is applied, the brake coupling portion 60 can restrain the apparatus body 21 and the brake shoe 41 to prevent the apparatus body 21 from moving away from the brake shoe 41. Therefore, a reliable reaction force for tension can be obtained. 【0078】 Furthermore, the rotating bodies 73 of the regulating guides 71 and 72 strike the outermost edge 9ea of ​​the extended front end 9e of the rehabilitated pipe 9, thereby restricting the deviation of the bracing brake mechanism 40 and, consequently, the pipe-making device 20. This prevents the pipe-making device 20 from tilting or shifting direction. In particular, it prevents the pipe-making device 20 from derailing towards the rear extension side (towards the back of the page in Figure 2) due to tension from the trailing belt section 19. By restricting the forward-facing end of the brake plate 41 (the right end in Figure 2) from shifting towards the rear extension side (towards the back of the page in Figure 2) using the regulating guide 71, derailment of the pipe-making device 20 can be prevented more reliably. Also, if there are obstacles such as steps on the inner surface of the existing pipe 1, the rotating body 3 can roll over the obstacles, allowing for smooth pipe-making. 【0079】Next, other embodiments of the present invention will be described. In the following embodiments, components that overlap with those described above will be denoted by the same reference numerals in the drawings and their descriptions will be omitted as appropriate. <Second Embodiment (Figures 6 to 12)> As shown in Figure 6, the existing pipe 1 of the second embodiment is constructed by arranging a plurality of pipe bodies 1a, such as concrete pipes, in a line. 【0080】 As shown in Figures 7 and 8, in the pipe-making apparatus 20B of the second embodiment, the brake mechanism 40B of the pipe-making apparatus 20B includes a connecting frame 64, a brake shoe 41, a bracing member 53, and a permanent adjustment tool 80. The connecting frame 64 extends from the bottom of the housing 22 of the apparatus body 21 toward the rear side (upward side in Figure 8). A pedestal-shaped bracing reaction force receiving portion 65 is provided in the middle of the connecting frame 64. A reaction force receiving shaft 66 is provided on the bracing reaction force receiving portion 65. The axis of the reaction force receiving shaft 66 is directed toward the width direction WD of the apparatus. 【0081】 A brake shoe 41 extends cantileveredly forward (to the right in Figure 7) from the forward end (right side in Figure 7) of the connecting frame 64. The brake shoe 41 has an arc-shaped brake plate 42 (pressing portion) and a vertical rib plate 43. The rear end (left end in Figure 7) of the vertical rib plate 43 is rotatably connected to the connecting frame 64 via a connecting shaft 63c. This allows the brake shoe 41 to be raised and lowered about the connecting shaft 63c as its central axis. 【0082】 The brake shoe 41 can be pressed against the inner surface of the pipe end 9e from the outer circumference side of the pipe end 9e without any support other than the existing pipe 1. The pipe manufacturing device 20B is the same as in the first embodiment (Figures 2 to 4) in that it is not provided with a brake guide that receives braking force from the outer circumference side of the pipe end 9e, with the brake shoe 41 and the pipe end 9e in between. 【0083】 As shown in Figures 7 and 8, a base-shaped bracing support portion 44 is provided in the middle of the brake shoe 41. The bracing support portion 44 is spanned across a pair of vertical rib plates 43. The bracing support portion 44 and the bracing reaction force support portion 65 are separated and facing each other in the longitudinal direction LD of the device. 【0084】 The bracing member 53 has a shaft 54 ​​and nuts 55 and 56. The shaft 54 ​​is made of a threaded member with a male threaded portion 54a formed around its entire circumference. The shaft 54 ​​is positioned with its axis substantially aligned along the longitudinal direction LD of the device, and is spanned between the bracing receiving portion 44 and the bracing reaction force receiving portion 65 so as to connect the device body 21 and the brake shoe 41. Thus, the bracing member 53 is spanned in a way that allows it to be braced. The rear end of the shaft 54 ​​(left end in Figure 8) is rotatably connected to the reaction force receiving shaft 66 of the bracing reaction force receiving portion 65. The front end of the shaft 54 ​​(right end in Figure 8) is supported by the bracing receiving portion 44 so as to be slidable back and forth. A regulating nut 55 (regulating portion) is provided on the portion of the shaft 54 ​​that protrudes forward (to the right in Figure 7) from the bracing receiving portion 44 to prevent the shaft 54 ​​from coming off or to define the maximum bracing force. 【0085】 As shown in Figures 8 and 9, a bracing nut 56 is screwed onto the rear portion of the bracing support portion 44 on the shaft 54. The bracing nut 56 is a bracing part that generates bracing force through rotational torque. 【0086】 As shown in Figure 8, the tensioning member 53 is equipped with an adjustment tool 80. The tensioning force of the tensioning member 53 is adjusted by the adjustment tool 80. The adjustment tool 80 includes a socket 81 (engaging part), an operating lever 82, and a switching mechanism 83. 【0087】As shown in Figures 8 and 9, the socket 81 is formed in a cylindrical shape. The shaft 54 ​​is inserted into the inside of the socket 81 so as to be rotatable relative to it. Furthermore, the inner circumference of the hexagonal cross-section of the socket 81 is fitted to the outer circumference of the hexagonal cross-section of the tensioning nut 56 so as to be non-rotatable relative to it. In this way, the socket 81 (engaging part) is engaged with the tensioning nut 56 (tensioning part) in a way that prevents it from being attached or detached. Furthermore, the adjustment tool 80 is attached to the tensioning member 53 in a way that prevents it from being attached or detached. In order to remove the adjustment tool 80, it is necessary to disassemble the brake mechanism 40B, such as by removing the tensioning member 53 from the tensioning receiving part 44 and the tensioning reaction force receiving part 65, and it is not possible to remove only the adjustment tool 80 without disassembling the other components of the pipe-making device 20B. The socket 81 may be integrally formed with the tensioning nut 56. 【0088】 The operating lever 82 is formed in the shape of a rod that extends in a direction perpendicular (intersecting) to the direction of extension of the shaft 54. The base end of the operating lever 82 is connected to the socket 81. By rotating the operating lever 82 around the axis of the socket 81 and the shaft 54, rotational torque is input to the bracing nut 56 (bracing action part) via the socket 81 (engaging part). 【0089】 As shown in Figure 8, the tip of the operating lever 82 is provided with a detachable part 84, which is, for example, a vertical hole with a female thread. By screwing the male thread 85b of the extension lever 85 into the female thread of the detachable part 84, the extension lever 85 can be added to the operating lever 82. This increases the rotational torque applied to the tensioning nut 56. Alternatively, the operating lever 82 can be shortened to prevent the adjustment tool 80 from interfering with other parts of the pipe-making device 20B or the trailing belt 19 when not in use. 【0090】As shown in Figure 9, a switching mechanism 83 is provided between the base end of the operating lever 82 and the socket 81. The switching mechanism 83 is composed of a known ratchet mechanism. The switching mechanism 83 allows a rotational torque in one of the two selected directions (hereinafter referred to as the "effective direction"), which is rotational direction a that tensions the tensioning member 53 and rotational direction b that releases tension, to be input from the operating lever 82 to the socket 81, and allows the operating lever 82 to rotate freely in the other direction (hereinafter referred to as the "free-rotating direction") that was not selected from the two rotational directions a and b. 【0091】 The switching mechanism 83 has a switching knob 83a that can be switched between a tensioning position and a tension release position. When the switching knob 83a is set to the tensioning position, the rotation direction a that tensions the tensioning member 53 is selected as the effective direction, and the rotation direction b that releases the tension becomes the free-spinning direction. At this time, when the operating lever 82 is turned to the effective direction, rotation direction a, the socket 81 rotates in rotation direction a together with the operating lever 82, causing the tensioning nut 56 to advance along the shaft 54 ​​and firmly strike the tensioning receiving part 44, thereby generating or increasing the tensioning force. On the other hand, when the switching knob 83a is set to the tensioning position, and the operating lever 82 is turned to the free-spinning direction b, the operating lever 82 spins freely, and the tensioning nut 56 does not move forward or backward. 【0092】 When the selector knob 83a is set to the release position, the rotation direction b on the release side is selected as the effective direction, and the rotation direction a on the tension side becomes the free-spinning direction. At this time, when the operating lever 82 is turned to the effective direction of rotation b, the socket 81 rotates in the rotation direction b together with the operating lever 82, causing the tensioning nut 56 to retract along the shaft 54, thereby reducing or releasing the tensioning force. On the other hand, when the selector knob 83a is set to the release position, and the operating lever 82 is turned to the free-spinning direction a, the operating lever 82 spins freely, and the tensioning nut 56 does not move forward or backward. 【0093】In the pipe manufacturing process of the pipe manufacturing apparatus 20B of the second embodiment, a predetermined braking force is preferably applied to the propulsion of the pipe manufacturing apparatus 20B by the brake mechanism 40B. Specifically, the bracing nut 56 is abutted against the bracing receiving portion 44 by the adjustment tool 80. This causes the bracing member 53 to be braced, and the brake shoe 41 is pressed against the inner circumferential surface of the pipe end 9e. As a result, as the pipe manufacturing apparatus 20B is propelled, the brake shoe 41 rubs against the inner circumferential surface of the pipe manufacturing apparatus 9, generating sliding friction and applying a braking force to the pipe manufacturing apparatus 20B. This braking force makes the amount of the trailing belt portion 19 fed by the drive unit 30 greater than the amount of propulsion of the pipe manufacturing apparatus 20, thereby suppressing the reduction in diameter of the pipe manufacturing apparatus 9 and enabling the manufacture of an expanded diameter pipe. By setting the tightening amount of the bracing nut 56 to a predetermined size, the bracing force of the bracing member 53 and thus the braking force can be set to a predetermined size, and the degree of diameter expansion (degree of diameter reduction suppression) of the rehabilitated pipe 9 can be set to a predetermined size. As a result, the rehabilitated pipe 9 can be manufactured to fit snugly around the entire inner circumference of the existing pipe 1, and the existing pipe 1 can be rehabilitated. 【0094】 Preferably, the effective direction of torque transmission is switched by the switching mechanism 83 according to the position of the pipe-making device 20B in the circumferential direction of the pipe end 9e, so that the direction of the rotational moment due to the weight of the operating lever 82 becomes the effective direction of torque transmission. In particular, as shown in Figure 10, when the pipe-making device 20B is located at the top of the pipe, the switching knob 83a is operated so that the direction of the rotational moment M due to the weight of the operating lever 82 becomes the effective direction of torque transmission. 【0095】 For example, as shown in Figure 11(a), when viewed from the forward side of the propulsion (the side closer to the viewer in the figure), the rotation moment M due to the weight of the operating lever 82 acts clockwise, the position of the switching knob 83a is selected such that the clockwise rotation direction b, which is the release side, becomes the effective direction e, and the rotation direction a, which is the tension side, becomes the free-spinning direction f. This prevents the operating lever 82 from spinning freely due to its own weight and sagging down, as shown by the dashed line in the figure. 【0096】As shown in Figure 11(b), when viewed from the forward side of the propulsion (the side closest to the viewer in the figure), the rotation moment M due to the weight of the operating lever 82 acts counterclockwise, the position of the switching knob 83a is selected such that the counterclockwise bracing rotation direction a becomes the effective direction e, and the bracing release rotation direction b becomes the free-spinning direction f. This prevents the operating lever 82 from free-spinning due to its own weight and sagging down as shown by the dashed line in the figure. 【0097】 The rotational moment M due to the weight of the operating lever 82 is sufficiently smaller than the rotational torque required to turn the tension nut 56. Therefore, the tension nut 56 does not rotate in the effective direction due to the weight of the operating lever 82, and the tension force and thus the braking force do not change. 【0098】 As shown in Figure 12(a), in aging existing pipes 1, the pipe axes of adjacent pipe bodies 1a may be misaligned, and a step 1d may be formed at the joint 1c between these pipe bodies 1a. Therefore, the braking force of the pipe-making device 20 is changed before and after the step 1d. That is, as shown by the solid line in Figure 12(a), when the position of the pipe-making device 20 and the pipe end 9e (pipe-making position) reaches a predetermined position before the step 1d, the braking force is weakened. Specifically, the switching knob 83a of the permanent adjustment tool 80 is set to the tension release side position, the rotation direction b on the tension release side is set to the effective direction e, and the operating lever 82 is rotated back and forth within the range of motion. As a result, the rotational torque on the tension release side when rotating in the rotation direction b (effective direction) is transmitted from the socket 81 to the tension nut 56. Furthermore, by rotating the lever 82 in the free-spinning direction a (free-spinning direction), the operating lever 82 can be returned to the starting point of the rotation stroke in the effective direction b (effective direction). Therefore, the reciprocating rotation of the operating lever 82 causes the tensioning nut 56 to retract along the shaft 54, reducing or releasing the tensioning force. As a result, the braking force from the brake shoe 41 is reduced or released. Consequently, as shown by the dashed line in Figure 12(a), the rehabilitated pipe 9 is reduced in diameter as it is formed toward the step 1d, allowing it to pass through the step 1d without hindrance. 【0099】Here, since the adjustment tool 80 is permanently attached to the bracing member 53, the brake force can be quickly reduced or released at a predetermined position before the step 1d. At the predetermined position, there is no need to take out, for example, an emergency tool such as a wrench from a toolbox and fit the emergency tool onto the bracing nut 56, nor is there any need to remove the tool from the bracing nut 56 and put it back in the toolbox after reducing or releasing the brake force with the emergency tool. 【0100】 As shown by the solid line in Figure 12(b), the braking force is increased after the pipe end 9e of the rehabilitated pipe 9 and the pipe-making device 20B pass the step 1d. Preferably, the braking force is increased compared to normal pipe-making. Specifically, the switching knob 83a of the permanent adjustment tool 80 is set to the bracing side position, the rotation direction a on the bracing side is set to the effective direction e, and the operating lever 82 is rotated back and forth. This transmits the rotational torque on the bracing side during rotation in rotation direction a (effective direction) from the socket 81 to the bracing nut 56. In addition, the operating lever 82 can be returned to the starting point of the rotation stroke in rotation direction a (effective direction) by rotating it in rotation direction b (free rotation direction). Therefore, the reciprocating rotation of the operating lever 82 causes the bracing nut 56 to advance along the shaft 54 ​​and abut firmly against the bracing receiving part 44. As a result, the bracing member 53 is braced, and the brake shoe 41 is pressed firmly against the inner circumferential surface of the pipe end 9e. Consequently, as shown by the dashed line in Figure 12(b), the braking force is increased, and the rehabilitated pipe 9 is expanded in diameter until it adheres to the inner circumference of the existing pipe 1. 【0101】 Here, since the adjustment tool 80 is permanently attached to the bracing member 53 in a way that prevents it from being detached, the braking force can be increased quickly after the pipe is moved past the step 1d. After passing the step 1d, there is no need to take out a spare tool such as a wrench from the toolbox and fit the spare tool onto the bracing nut 56, nor is there any need to remove the tool from the bracing nut 56 and put it back in the toolbox after increasing the braking force with the spare tool. 【0102】As shown by the solid line in Figure 12(c), when the rehabilitated pipe 9 has been manufactured with an expanded diameter until it adheres to the inner circumference of the existing pipe 1, the braking force is returned to the predetermined size during normal adhesion manufacturing. Specifically, the switching knob 83a of the permanently installed adjustment tool 80 is switched to the release side position, for example, and then the operating lever 82 is turned to return the tension of the tension member 53 to the predetermined size. Since the adjustment tool 80 is permanently installed on the tension member 53, the braking force after the rehabilitated pipe 9 has been manufactured with an expanded diameter until it adheres to the existing pipe 1 can be adjusted quickly. As a result, as shown by the dashed line in Figure 12(c), the rehabilitated pipe 9 can be manufactured so that it adheres to the inner circumference of the existing pipe 1. 【0103】 In this way, the braking force is adjusted each time the pipe manufacturing position passes over a step 1d in the existing pipe 1, preferably each time it passes over a joint 1c. The braking force can be quickly adjusted each time using the permanent adjustment tool 80, which reduces working time compared to using a non-permanent tool such as a wrench. Since the working time can be reduced by the number of steps 1d or joints 1c, the cumulative working time for adjusting the braking force of the entire existing pipe 1 can be significantly reduced. Although not shown in the diagram, the rehabilitation pipe 9 may also be expanded or contracted by changing the braking force setting using the adjustment tool 80 before and after the curved section where the pipe axis of the existing pipe 1 curves. As a result, the rehabilitation construction time of the existing pipe 1 can be sufficiently reduced, and the work rate of the rehabilitation construction can be improved. 【0104】<Third Embodiment (Figures 13-19)> As shown in Figure 13, in the pipe-making apparatus 20C according to the third embodiment of the present invention, the bracing member 57 of the bracing brake mechanism 40C is installed at an angle. More specifically, as shown in Figures 13 and 14, the brake shoe 41 of the bracing brake mechanism 40C includes an arc-shaped curved brake plate 42, a pair of vertical rib plates 43, and a pair of lateral wing plates 46. At the rearward end of the brake shoe 41 (left side in Figure 14), two bifurcated rotating connecting parts 47 and 48 are provided side by side in the width direction WD of the apparatus. The rotating connecting part 47 on the forward extension side (lower side in Figure 14) is rotatably connected to the bottom arm 61 of the apparatus body 21. The rotating connecting part 48 on the rear extension side (upper side in Figure 14) is rotatably connected to the connecting plate 62 of the apparatus body 21. The rotation axes of the rotating coupling section 47 and the rotating coupling section 48 are aligned in a straight line with each other and extend in the width direction WD of the device. This allows the brake shoe 41 to rotate upward and downward relative to the device body 21 around the rotation axes of the rotating coupling sections 47 and 48. 【0105】 As shown in Figure 13, the connecting plate 62 is formed in a roughly triangular shape when viewed from the front. The connecting plate 62 protrudes from the rear end 41b of the brake shoe 41 toward the top side (upward side in Figure 13) in the device height direction HD. A bracing reaction force receiving portion 67 is provided at the top end of the connecting plate 62. As shown in Figure 14, the bracing reaction force receiving portion 67 includes a reaction force receiving shaft 68 whose axis is oriented toward the device width direction WD. 【0106】 As shown in Figure 13, a base-shaped bracing support portion 44 is provided in the middle of the brake shoe 41. The bracing support portion 44 and the bracing reaction force support portion 67 are spaced apart in the longitudinal direction LD of the device and the height direction HD of the device. 【0107】As shown in Figure 13, the bracing member 57 is stretched between the bracing reaction force receiving portion 67 and the bracing receiving portion 44 so as to be able to brace itself. The bracing member 57 extends diagonally with respect to the longitudinal direction LD of the device and the height direction HD of the device. Preferably, the bracing member 57 is provided with a permanent adjustment tool 80 similar to that of the second embodiment (Figure 7). The bracing force of the bracing member 57 is increased or decreased by the permanent adjustment tool 80. Alternatively, the bracing force of the bracing member 57 may be adjusted by a detachable adjustment tool 52 (Figure 2) similar to that of the first embodiment. 【0108】 Preferably, the diameter of the shaft 58 of the bracing member 57 in the third embodiment (Figure 13) is, for example, about 15 mm to 30 mm, which is thicker than the diameter of the shaft 54 ​​in the first embodiment (Figure 2) and the second embodiment (Figure 7) (for example, about 10 mm to 15 mm). The top end of the shaft 58 is rotatably connected to the reaction force receiving shaft 68 of the bracing reaction force receiving part 67. The bottom end of the shaft 58 is slidably connected to the bracing receiving part 44. 【0109】 As shown in Figures 15 and 17, a pressing portion 45 is provided on the bottom surface (bottom surface in Figure 13) of the brake shoe 41, extending from the longitudinal middle portion to the front end (right end in Figure 13) on the propulsion side. The pressing portion 45 is made of a material with a high coefficient of friction against the rehabilitating pipe 9. Preferably, the pressing portion 45 is made of a rubber pad. The pressing portion 45 may also be made of an adhesive material such as butyl rubber, silicone adhesive, acrylic adhesive, urethane adhesive, or other pressure-sensitive adhesive. 【0110】 The pressing portion 45 can be pressed against the inner circumferential surface of the pressed portion 9eb of the extended front end 9e of the rehabilitation pipe 9. The brake shoe 41 is a single-sided brake shoe that is pressed against the pressed portion 9eb from the outer circumferential side of the pressed portion 9eb without any support other than the existing pipe 1. 【0111】 As shown in Figure 18, the contact surface 45a of the pressing portion 45 with the portion to be pressed 9eb may have irregularities 45b formed on it. 【0112】As shown in FIG. 14, the width dimension W along the device width direction WD of the pressing portion 45 of the brake shoe 41 ４５ is approximately the same as the spiral pitch P of the regeneration pipe 9 ９ (effective width of the belt-like member 10) (W ４５ ≈ P ９ ), or greater than that (W ４５ ≥ P ９ ). By "approximately the same", it means that the width dimension W ４５ is preferably in the range of 0.8 times to 1.2 times the spiral pitch P (0.8 × P ９ ≤ W ９ ≤ 1.2 × P ４５ ). Preferably, the pressing portion 45 straddles the winding portion 9a at the outermost front end (first turn) of the regeneration pipe 9 and the winding portion 9b at the second turn adjacent to the rear of its extension. ９ 【0113】 As shown in FIGS. 15 and 16, a brake guide mechanism 90 is added to the tension type brake mechanism 40C of the third embodiment. The brake guide mechanism 90 includes a guide frame 91, a brake guide 92, and a lifting roller 93. As shown in FIG. 16, the guide frame 91 is fixed to the side portion on the front side of the extension (left side in FIG. 16) of the brake shoe 41 with a fixing bolt 94. A brake guide 92 is provided at the bottom end portion (lower end portion in FIG. 16) of the guide frame 91. 【0114】 As shown in FIG. 15, the brake guide 92 is arranged in the vicinity of the device longitudinal direction LD with respect to the pressing portion 45. Preferably, the brake guide 92 is arranged offset to the rear side in the advancing direction of the device longitudinal direction LD (left side in FIG. 13) from the pressing portion 45. 【0115】 As shown in FIG. 16, the brake guide 92 has a locking claw 92a with an L-shaped cross-sectional shape. The locking claw 92a is locked from the outer peripheral side (downward in FIG. 16) to the locking groove 15A in the vicinity of the pressed portion 9eb at the extension front end portion 9e. The brake guide 92 is slidable along the extension front end portion 9e in the spiral winding direction (direction perpendicular to the paper surface in FIG. 16). [[ID=3(2]] 【0116】 ​As shown in Figure 15, the length L of the locking claw 92a along the longitudinal direction LD of the device. ９２ The length L of the pressing portion 45 is ４５ Shorter. Preferably, the length L of the locking claw 92a. ９２ The length L of the pressing portion 45 is ４５ It is approximately 0.1 to 0.9 times (0.1 × L) ４５ ≤ L ９２ ≤0.9 × L ４５ ). 【0117】 As shown in Figures 15 and 16, a lifting plate 95 is supported on the guide frame 91 so as to be able to move up and down. The lifting plate 95 can be raised and lowered in the device height direction HD by height adjustment bolts 96. The lifting plate 95 has an elongated hole 95b formed therein, with its longitudinal direction facing the device height direction HD. Furthermore, the position of the lifting plate 95 in the device height direction HD is fixed by a retaining bolt 97. The retaining bolt 97 is screwed into the guide frame 91 through the elongated hole 95b of the lifting plate 95. 【0118】 A lifting roller 93 is rotatably mounted on the bottom side (lower side in Figure 15) of the lifting plate 95, relative to the elongated hole 95b. The lifting roller 93 is height-adjustable in the device height direction HD by a height adjustment bolt 96, integral with the lifting plate 95. The rotation axis of the lifting roller 93 is oriented in the device width direction WD. 【0119】 As shown in Figure 16, the lifting roller 93 includes a cylindrical portion 93a and a conical portion 93b. By adjusting the height of the lifting roller 93, a portion of the cylindrical portion 93a protrudes below the brake guide 92 in the device height direction HD (outer circumference side, downward in Figure 16). The cylindrical portion 93a is in contact with the inner circumferential surface of the existing pipe 1. The conical portion 93b is reduced in diameter as it protrudes from the cylindrical portion 93a toward the forward extension in the device width direction WD (left side in Figure 16). The lifting roller 93 is capable of rolling on the inner circumference of the existing pipe 1. The lifting roller 93 may consist only of the cylindrical portion 93a, or it may consist only of the conical portion 93b. 【0120】In the rehabilitation work of the existing pipe 1 using the pipe-making device 20C, the trailing belt portion 19 is pushed out diagonally by the drive unit 30, and the trailing belt portion 19 is incorporated into the rehabilitated pipe 9 at the joining action portion 9c. Furthermore, the propulsion reaction force caused by the pushing propels the pipe-making device 20C along the spiral winding direction that is counterclockwise and toward the front of the paper in Figure 13. As a result, the pipe-making of the rehabilitated pipe 9 progresses, and the rehabilitated pipe 9 is extended toward the front of the paper in Figure 13. 【0121】 When the rehabilitated pipe 9 is manufactured, the bracing member 57 is braced with the permanently installed adjustment tool 80. The component of the bracing force in the pipe diameter direction causes the brake shoe 41 to press against the inner circumferential surface of the rehabilitated pipe 9. This generates a braking force, causing the rehabilitated pipe 9 to expand in diameter and adhere to the inner circumference of the existing pipe 1. With the pipe manufacturing device 20C, because the bracing member 57 is angled, the component of the bracing force in the pipe diameter direction can be increased, thereby increasing the braking force. 【0122】 Furthermore, by having the pressing portion 45 straddle the first and second winding portions 9a and 9b of the rehabilitation pipe 9, the braking force can be applied more stably. In addition, by making the pressing portion 45 out of rubber, forming irregularities 45b on the contact surface 45a, or making the pressing portion 45 adhesive, the frictional resistance between the pressing portion 45 and the pressed portion 9eb can be increased, thereby further increasing the braking force. 【0123】 Furthermore, by increasing the thickness of the shaft 58 of the bracing member 57, the resistance to tightening torque can be increased, and the braking force can be further enhanced. As a result, even with a single-piston brake shoe that does not have support from the outer circumference side of the pressed portion 9eb, the required braking force can be sufficiently obtained. 【0124】The reaction force of the bracing is directly received by the bracing reaction force receiving part 67. Furthermore, the reaction force of the bracing is transferred from the tip 24d on the propulsion rear side of the outer peripheral guide plate 24 of the device body 21 to the existing pipe 1. Therefore, the existing pipe 1 bears the bracing reaction force. Alternatively, the reaction force may be transferred from the tip of the inner peripheral guide arm 23 to the rehabilitated pipe 9, so that the rehabilitated pipe 9 bears the bracing reaction force. This ensures that the bracing reaction force is reliably obtained. Therefore, braking force can be reliably generated. 【0125】 When the pipe-making device 20C is braced, the middle portion of the device's longitudinal direction LD tends to float inward in the pipe diameter direction (see Figure 5). This prevents the brake guide 92 and pipe end guide 25 from coming into strong contact with the existing pipe 1, thereby mitigating interference between the brake guide 92 and pipe end guide 25 and the existing pipe 1. 【0126】 Furthermore, the lifting roller 93 allows the brake guide 92 to be separated from the inner circumferential surface of the existing pipe 1. Therefore, interference between the brake guide 92 and, consequently, the brake mechanism 40C with the existing pipe 1 can be reliably avoided. 【0127】 As shown in Figure 19, during tensioning, the tip portion 45e (specific location) of the brake shoe 41's pressing portion 45 strongly contacts the pressed portion 9eb of the rehabilitated pipe 9, generating tension. As a result, the rear end portion 45d of the pressing portion 45 floats inward in the pipe diameter direction (upward in the device height direction HD) and tries to move away from the pressed portion 9eb of the rehabilitated pipe 9 (Figure 19(b)). In contrast, as shown in Figure 19(a), the pipe manufacturing apparatus 20C can bend the rehabilitated pipe 9 near the pressed portion 9eb inward in the pipe diameter direction by the brake guide 9. This prevents uneven contact of the tip portion 45e (Figure 19(b)) and allows the entire surface of the pressing portion 45 to be pressed evenly against the pressed portion 9eb of the rehabilitated pipe 9 (Figure 19(a)). Therefore, braking force can be stably generated. 【0128】Although detailed illustrations are omitted, when the pipe-making device 20C is positioned at the top of the rehabilitated pipe 9, the locking of the brake guide 92 and the pipe end guide 25 prevents the pipe-making device 20 from descending under its own weight. Consequently, the pressing portion 45 is prevented from moving downward from the top of the rehabilitated pipe 9. Therefore, a stable braking force can be applied regardless of the position of the pipe-making device 20C in the circumferential direction of the pipe. 【0129】 According to the pipe-making apparatus 20C, by angling the bracing member 57, the length of the brake plate 42 along the longitudinal direction LD of the apparatus can be made shorter than in the first embodiment (Figure 2) and the second embodiment (Figure 7). Therefore, the pipe-making apparatus 20C can be made more compact and lighter. As a result, the downward force due to the weight of the pipe-making apparatus 20C when it is positioned at the top of the rehabilitated pipe 9 can be reduced. 【0130】 <Fourth Embodiment (Figure 20)> As shown in Figure 20, in the pipe-making apparatus 20D of the fourth embodiment of the present invention, the bracing member 59 is rotatable so as to move up and down relative to the apparatus body 21. As shown by the dashed line in Figure 20, when it is not necessary to apply the brakes, the bracing member 59 is rotated in the upward direction to separate the contact portion 45 of the brake shoe 41 from the rehabilitated pipe 9. This prevents the brake force from being applied. 【0131】 The fourth embodiment is particularly effective when the coefficient of friction between the pressing portion 45 and the rehabilitation pipe 9 is high. For example, the fourth embodiment is effective when the pressing portion 45 is made of rubber or an adhesive material (Figure 17), or when the contact surface 45a has irregularities 45b (Figure 18). 【0132】 <Fifth Embodiment (Figure 21)> As shown in Figure 21, in the pipe manufacturing apparatus 20E of the fifth embodiment of the present invention, the bracing member 101 of the bracing brake mechanism 100 extends substantially along the diameter of the pipe so as to connect two points on the inner circumferential surface of the rehabilitated pipe 9 that are opposite each other in the diameter of the pipe. 【0133】A brake arm 102 extends from the main body 21 of the pipe-making apparatus 20E toward the forward side (left side in Figure 21). The brake arm 102 is formed in an arc shape along the circumferential direction of the pipe or the spiral winding direction. A brake shoe 41 is provided at the tip of the brake arm 102. A bracing support portion 103 is provided on the top surface (inner circumferential surface) of the brake shoe 41. Multiple rollers 104 are provided at intervals in the direction of extension of the brake arm 102. Each roller 104 is capable of rolling on the inner circumferential surface of the rehabilitated pipe 9. The brake arm 102 may also be in a straight line extending straight from the main body 21 to the brake shoe 41. 【0134】 A bracing reaction force receiving connecting arm 110 extends from the main body 21 of the pipe-making device 20E toward the rearward side of the propulsion (right side in Figure 21). The bracing reaction force receiving connecting arm 110 is formed in an arc shape along the circumferential direction or spiral winding direction of the rehabilitated pipe 9. The length of the bracing reaction force receiving connecting arm 110 is greater than the length of the brake arm 102. The bracing reaction force receiving connecting arm 110 extends to the pipe portion 9r on the opposite side of the placement of the main body 21 in the circumferential direction of the rehabilitated pipe 9. 【0135】 Multiple rollers 114 are provided at intervals in the extension direction of the bracing reaction force receiving connecting arm 110. Each roller 114 is capable of rolling on the inner circumferential surface of the rehabilitation pipe 9. 【0136】 A tension reaction force receiving portion 120 is provided at the tip of the tension reaction force receiving connecting arm 110. The tension reaction force receiving connecting arm 110 may also be in a straight line extending from the device body 21 to the tension reaction force receiving portion 120. 【0137】 The bracing reaction force receiving portion 120 is positioned opposite the bracing receiving portion 103 of the brake shoe 41 in the direction of the approximate diameter of the rehabilitation pipe 9. In other words, the bracing receiving portion 103 and the bracing reaction force receiving portion 120 are spaced apart in the direction of the spiral winding of the rehabilitation pipe 9. The bracing reaction force receiving portion 120 can be pressed against the inner circumferential surface of the pipe portion 9r on the opposite side of the rehabilitation pipe 9. 【0138】A bracing support portion 103 is connected to one end of the bracing member 101. A bracing reaction force receiving portion 120 is connected to the other end of the bracing member 101. Preferably, the bracing member 101 is provided with a permanent adjustment tool 80 similar to that of the second embodiment. The bracing member 101 may also be configured so that the bracing force can be adjusted by a detachable adjustment tool 52 (Figure 2) similar to that of the first embodiment. 【0139】 In the rehabilitation work of the existing pipe 1 using the pipe-making device 20E, the trailing belt portion 19 is pushed out diagonally by the drive unit 30, and the trailing belt portion 19 is incorporated into the rehabilitated pipe 9 at the joining action portion 9c. Furthermore, the entire pipe-making device 20E, including the bracing brake mechanism 100, is propelled by the propulsion reaction force from the pushing, along the spiral winding direction clockwise and toward the back of the page in Figure 21. As a result, the pipe-making of the rehabilitated pipe 9 progresses, and the rehabilitated pipe 9 is extended toward the back of the page in Figure 21. 【0140】 When the rehabilitated pipe 9 is manufactured by the pipe manufacturing device 20E, the bracing member 101 is braced with the adjustment tool 80, causing the contact portion 45 of the brake shoe 41 to press against the inner circumferential surface of the rehabilitated pipe 9. This generates a braking force, causing the rehabilitated pipe 9 to expand in diameter and adhere to the inner circumference of the existing pipe 1. Since the bracing direction of the bracing member 101 is roughly aligned with the pipe diameter direction, a large braking force can be obtained. 【0141】 The reaction force from the bracing is transmitted from the bracing reaction force receiving section 120 to the opposite pipe section 9r of the rehabilitated pipe 9. Furthermore, the opposite pipe section 1r of the existing pipe 1 receives the reaction force from the bracing. This ensures that braking force is reliably generated. Therefore, a brake guide can be omitted in the bracing type brake mechanism 100. This reduces interference between the brake mechanism 100 and the existing pipe 1. 【0142】The present invention is not limited to the embodiments described above, and various modifications can be made without departing from its spirit. For example, the brake shoe 41 of the bracing brake mechanism may be located in the center of the device body 21 in the longitudinal direction LD of the device or on the rear side of the propulsion (left side in Figure 2). The bracing member 50 of the first embodiment (Figures 2 to 4) may be composed of a bolt and nut instead of a turnbuckle 51. The brake shoe 41 may be connected to the device body 21 only via the bracing member 50, and the brake connection part 60 may be omitted. The brake plate 42 may be flat. The number of regulating guides 71, 72 is not limited to two, but may be one or three or more. The regulating guide may have a block or plate-shaped non-rotating guide member instead of a rotating body 73. The bracing brake mechanism may have a brake guide that is locked to the pressed part 9eb from the outer circumference. In the third embodiment (Figure 13), the brake guide 92 may be positioned to face the pressing portion 45 with the pressed portion 9eb in between. Multiple embodiments may be combined with each other. For example, the outer circumferential surface (pressing portion) of the brake plate 42 in the second embodiment (Figure 7) may be made of a rubber pad (Figure 17) or a viscous material, or may have irregularities 45b (Figure 18). 【0143】 This invention can be applied, for example, to the rehabilitation technology of aging sewer pipes. 【0144】 1 Existing pipe 1r Opposite pipe section 9 Rehabilitated pipe L ９ Tube shaft P ９9a Helical pitch 9a First turn (foremost end of extension) 9b Second turn adjacent to the rear of extension 9c Joining part 9e Front end of extension 9ea Outer edge 9eb Pressed part 9r Opposite pipe section 10 Strip-shaped member (profile) 13 Female fitting part 13a Fitting groove 13e Raised end 14 Male fitting part 15 Outer circumference groove 15A Locking groove (outer circumference groove) 19 Successor strip section 20 Pipe making device 20B-20E Pipe making device 21 Device body 22 Housing 23 Inner circumference guide arm 24 Outer circumference guide plate 25 Pipe end guide 30 Drive unit 31 Drive roller 32 Drive roller 33 Drive motor 40 Bounce type brake mechanism 40B Bounce type brake mechanism 40C Brace-type brake mechanism 41 Brake shoe 42 Brake plate 43 Vertical rib plate 44 Brace receiving part 45 Pressing part 45a Contact surface 45b Uneven surface 45e Tip part (specific location) 50 Brace member 51 Turnbuckle 52 Ratchet type torque wrench (adjustment tool) 53 Brace member 54 Shaft 54a Male screw 55 Regulating nut (regulating part) 56 Brace nut (brace action part) 57 Brace member 58 Shaft 59 Brace member 60 Brake connecting part 61 Bottom arm 62 Connecting plate 62b Brace reaction force receiving part 63 Connecting frame 63c Connecting shaft 65 Brace reaction force receiving part 66 Reaction force receiving shaft 67 Brace reaction force receiving part 68 Reaction force receiving shaft 71 Restriction guide 72 Restriction guide 73 Rotating body 73d Rear side of extension 80 Permanent adjustment tool 81 Socket (engaging part) 82 Operating lever 83 Switching mechanism 83a Switching knob 84 Detachable part 85 Extension lever 85b Male screw a Rotation direction on the tensioned side b Rotation direction on the tension-released side e Effective direction f Free-spinning direction 90 Brake guide mechanism 91 Guide frame 92 Brake guide 92a Locking claw 93 Lifting roller95 Lifting plate 96 Height adjustment bolt 100 Brake mechanism 101 Brake member 102 Brake arm 103 Brake support part 110 Brake reaction force receiving connecting arm 120 Brake reaction force receiving part

Claims

1. A pipe-making device for rehabilitating an existing pipe, which is positioned at the extended front end in the pipe axis direction of a spiral-shaped rehabilitation pipe formed by spirally winding a long strip-shaped member along the inner circumference of an existing pipe, and which joins the opposing edges of the trailing strip portion of the strip-shaped member connected to the rehabilitation pipe and the extended front end in a concave-concave fitting and propels in the spiral winding direction, comprising: a device body positioned on the inner circumference side of the extended front end with the device's longitudinal direction aligned with the spiral winding direction, the device's width direction aligned with the pipe axis direction, and the device's height direction aligned with the pipe diameter direction; and a drive unit provided on the device body having at least one pair of drive rollers, which grips the trailing strip portion with the drive rollers and pushes it diagonally toward the extended front end toward the rear side in the longitudinal direction of the device and toward the bottom side in the height direction of the device, thereby obtaining a pushing force for the joining and propulsion; A pipe-making apparatus comprising a bracing-type brake mechanism that generates a braking force against the propulsion by bracing, wherein the bracing-type brake mechanism includes: a brake shoe having a pressing portion that can be pressed against the inner circumferential surface of the portion to be pressed at the extended front end; a bracing reaction force receiving portion provided on the main body of the apparatus; a bracing receiving portion provided on the brake shoe; and a bracing member that is braced between the bracing reaction force receiving portion and the bracing receiving portion, wherein the bracing reaction force receiving portion and the bracing receiving portion are spaced apart in the longitudinal direction of the apparatus or in the spiral winding direction.

2. The pipe manufacturing apparatus according to claim 1, characterized in that the brake shoe is a single-sided brake shoe that is pressed against the object to be pressed without any support other than the existing pipe from the outer circumference side of the object to be pressed.

3. The pipe-making apparatus according to claim 1, characterized in that the bracing brake mechanism further includes a brake guide that is locked from the outer circumference to a portion near the pressed portion at the extended front end.

4. The pipe-making apparatus according to claim 3, characterized in that the bracing brake mechanism further includes a lifting roller that protrudes from the brake guide toward the forward extension in the width direction of the apparatus and toward the bottom in the height direction of the apparatus and is capable of rolling on the inner circumference of the existing pipe.

5. The pipe-making apparatus according to claim 1, characterized in that the bracing member extends diagonally with respect to the longitudinal direction of the apparatus and the height direction of the apparatus.

6. The pipe-making apparatus according to claim 1, characterized in that the width dimension of the pressing portion along the width direction of the apparatus is equal to or greater than the helical pitch of the rehabilitated pipe, and the pressing portion straddles the winding portion at the foremost extended end of the rehabilitated pipe and the winding portion adjacent to the rear of that extension.

7. The pipe-making apparatus according to claim 1, characterized in that the bracing member extends along the longitudinal direction of the apparatus.

8. The pipe-making apparatus according to claim 1, characterized in that the bracing member extends forward from the drive unit along the longitudinal direction of the apparatus, and the brake shoe is provided at the forward end of the bracing member.

9. The pipe-making apparatus according to claim 8, wherein the apparatus body includes a brake coupling portion that rotatably connects the brake shoe around a connecting shaft along the width direction of the apparatus, and the brake shoe includes a brake plate that extends cantilevered from the brake coupling portion toward the forward propulsion side in the longitudinal direction of the apparatus.

10. The pipe manufacturing apparatus according to claim 9, characterized in that the brake plate is curved in an arc shape with a curvature corresponding to the pipe manufacturing diameter of the rehabilitated pipe.

11. The pipe-making apparatus according to claim 1, characterized in that the bracing member includes a turnbuckle.

12. The pipe-making apparatus according to claim 1, characterized in that the bracing brake mechanism includes one or more regulating guides that are applied to the outermost edge of the extended front end.

13. The pipe-making apparatus according to 12, wherein the regulating guide includes a rotating body that is rotatable about a rotation axis along the width direction of the apparatus, and the extended rear side of the rotating body is brought into contact with the outermost edge.

14. The pipe-making apparatus according to claim 9, characterized in that a regulating guide is provided on the side of the brake plate on the extension forward side in the width direction of the apparatus, which is applied to the outermost edge of the extension front end.

15. The pipe-making apparatus according to claim 1, further comprising a permanent adjustment tool for adjusting the tensioning force of the tensioning member, wherein the tensioning brake mechanism is detachably attached to the tensioning member.

16. The pipe-making apparatus according to 15, wherein the bracing member includes a shaft extending so as to connect the main body of the apparatus and the brake shoe, and a bracing part provided on the shaft that generates the bracing force by rotational torque, and the adjustment tool includes an engaging part that is detachably engaged with the bracing part, and an operating lever that inputs rotational torque to the bracing part via the engaging part.

17. The pipe manufacturing apparatus according to claim 1, further comprising a bracing reaction force receiving connecting arm extending from the main body of the apparatus to the pipe portion opposite in the circumferential direction of the rehabilitated pipe, wherein the tip of the bracing reaction force receiving connecting arm is provided so as to be able to press against the pipe portion on the opposite side, and the bracing member extends substantially along the diameter direction of the pipe so as to connect the bracing reaction force receiving portion and the bracing receiving portion.

18. A method for rehabilitating an existing pipe using a pipe-making apparatus as described in claim 16, wherein the adjustment tool includes a switching mechanism that allows input of rotational torque in an effective direction selected from among the rotational direction for bracing the bracing member and the rotational direction for releasing the bracing to the bracing action part, and causes the operating lever to rotate freely in the free-spinning direction of the two rotational directions that was not selected, and the switching mechanism makes the selection so that the direction of the rotational moment due to the weight of the operating lever becomes the effective direction, depending on the position of the pipe-making apparatus in the circumferential direction of the pipe end.

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