Tube making machine

Abstract

To provide a pipe making machine capable of appropriately fitting a reinforcing member.SOLUTION: A pipe making machine comprises a spiral-winding guide device, a connecting device, and a fitting device 72. The fitting device comprises: a reinforcing member forwarding roller 120, a first reaction-force receiving roller 122, a reinforcing member bending roller 124, and a second reaction-force receiving roller 126, and curves a reinforcing member at a predetermined curvature by pressing the reinforcing member with the reinforcing member bending roller with the second reaction-force receiving roller as a bending fulcrum while fixing a radial direction position of the reinforcing member with the reinforcing member forwarding roller and the first reaction-force receiving roller.SELECTED DRAWING: Figure 27

Description

[Technical Field]

[0001] This invention relates to a pipe making machine that forms a helical pipe by spirally winding a lining member and connecting adjacent side edges of the lining member, and then sequentially feeding the formed helical pipe into an existing pipe. [Background technology]

[0002] An example of a conventional pipe-making machine is disclosed in Patent Document 1. The pipe-making machine of Patent Document 1 includes a rigid mounting box that holds a gear mechanism and to which a drive motor that applies a rotational driving force to the gear mechanism is attached, an outer roller and an inner roller that are arranged at the joining portion between the tubular body (helical tube) to be formed and a newly supplied strip-shaped member (lining member) and that clamp and drive the strip-shaped member, with at least the outer roller having a joining roller section that operates in conjunction with the gear mechanism, a rigid surrounding box that straddles the outer roller and is fixed to the mounting box, and an outer periphery restriction frame that has a spiral-annular frame structure that holds multiple rollers arranged in parallel with each other and is fixed via the surrounding box and is arranged to make substantially one spiral revolution along the newly supplied strip-shaped member to the first joining portion of the strip-shaped member. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-104777 Summary of the Invention [Problem to be solved by the invention]

[0004] Spiral pipes used to rehabilitate existing pipes are required to have a certain level of strength (rigidity). One way to increase the strength of a spiral pipe is to attach a reinforcing member to the spirally wound lining material. However, it is difficult to bend a high-strength reinforcing member to the specified curvature, and there is a risk of problems such as reverse bending deformation of the reinforcing member.

[0005] SUMMARY OF THE INVENTION It is therefore a primary object of the present invention to provide a novel pipe making machine.

[0006] Another object of the present invention is to provide a pipe manufacturing machine that can properly attach reinforcing members. [Means for solving the problem]

[0007] The first invention is a pipe making machine that forms a helical pipe by spirally winding a lining member and connecting adjacent side edge portions of the lining member, and then sequentially feeds the formed helical pipe into an existing pipe. The machine includes a spiral winding guide device that guides the lining member to be wound helically, a connecting device that connects adjacent side edge portions of the helically wound lining member, and a reinforcing member that is attached to the outer surface of the helically wound lining member. spirally the reinforcing member feed roller that applies a rotational force to the helical tube by pressing the reinforcing member from the outer surface side to attach the reinforcing member to the outer surface side of the lining member; a motor that drives the reinforcing member feed roller to rotate; a first reaction force receiving roller that is arranged circumferentially opposite the reinforcing member feed roller and presses the inner surface side of the lining member so as to sandwich the lining member between it and the reinforcing member feed roller; a reinforcing member bending roller that is arranged circumferentially downstream of the reinforcing member feed roller in the rotation direction of the helical tube and at a predetermined distance from the reinforcing member feed roller, and presses the reinforcing member from the outer surface side to curve the reinforcing member so as to fit the outer surface of the lining member; and a second reaction force receiving roller that is arranged circumferentially between the reinforcing member feed roller and the reinforcing member bending roller and presses the inner surface side of the lining member.

[0008] In the first invention, the pipe making machine is a push-type pipe making machine that sequentially feeds the formed spiral pipe into an existing pipe, and is equipped with a spiral winding guide device, a connecting device, and an attachment device. The spiral winding guide device is a device that guides the lining member so that it is wound spirally. The connecting device is a device that connects adjacent side edge portions of the spirally wound lining member. The attachment device is a device that attaches a reinforcing member from the outer surface side of the spirally wound lining member. spirally The attachment device includes a reinforcing member feed roller, a first reaction force receiving roller, a reinforcing member bending roller, and a second reaction force receiving roller. This attachment device attaches a reinforcing member using the reinforcing member feed roller and the first reaction force receiving roller, and while fixing the radial position of the reinforcing member with the reinforcing member feed roller and the first reaction force receiving roller, the reinforcing member bending roller presses the reinforcing member from the outside with the second reaction force receiving roller as a bending fulcrum, thereby bending the reinforcing member to a predetermined curvature.

[0009] According to the first aspect of the present invention, the mounting device includes a reinforcing member bending roller and a second reaction force receiving roller, so that the reinforcing member can be appropriately bent to a predetermined curvature, thereby enabling the reinforcing member to be appropriately mounted and a high-strength spiral tube to be appropriately formed.

[0010] A second invention is dependent on the first invention, and the reinforcing member bending roller is provided so as to be movable in the radial direction of the helical tube, and the amount of bending of the reinforcing member is adjustable.

[0011] According to the second invention, the mounting device can be used in other pipe making machines that form helical pipes of different diameters.

[0012] A third invention is dependent on the second invention, and the reinforcing member bending roller is supported by a frame provided so as to be swingable about a swing shaft arranged parallel to the shaft of the reinforcing member bending roller as a fulcrum.

[0013] According to the third aspect of the present invention, the radial position of the reinforcing member bending roller can be easily adjusted.

[0014] A fourth invention is according to the first or second invention, and the motor that rotates the reinforcing-member feeding roller is also used as the motor that rotates the reinforcing-member bending roller.

[0015] A fifth invention is according to the first or second invention, and the mounting device mounts the reinforcing member to the lining member.

[0016] A sixth invention is according to the first or second invention, and the attachment device attaches the reinforcing member to the lining member so as to straddle and cover the connecting portion of the lining member.

[0017] According to the sixth aspect of the present invention, the reinforcing member is attached so as to straddle and cover the connecting portion of the lining member, so that deformation of the connecting portion of the lining member can be suppressed, and a helical pipe with excellent earthquake resistance can be formed.

[0018] The seventh invention is dependent on the sixth invention, and the connecting device connects adjacent side edge portions of the lining member to each other by attaching a connecting member to the lining member from the outer surface side, and the mounting device attaches a reinforcing member to the lining member so as to cover the connecting member.

[0019] According to the seventh aspect of the present invention, by using a connecting member to connect the lining members, it becomes easier to align the circumferential lengths of adjacent lining members when forming a helical pipe, and it is possible to form a helical pipe with a uniform diameter along its entire axial length. In addition, the connecting member is protected by the reinforcing member, so it is possible to prevent the connecting member from rubbing against the inner surface of the existing pipe and being damaged.

[0020] The eighth invention is dependent on the first or second invention, and the connecting device attaches a connecting member to the lining member from the outer surface side, thereby connecting adjacent side edge portions of the lining member with the connecting member, and the mounting device attaches the reinforcing member to the connecting member.

[0021] According to the eighth aspect of the present invention, by using a connecting member to connect the lining members, it becomes easier to align the circumferential lengths of adjacent lining members when forming a helical pipe, and it is possible to form a helical pipe with a uniform diameter along its entire axial length. In addition, by attaching a reinforcing member to the connecting member, it is possible to suppress deformation of the connecting portions of the lining members, and it is possible to form a helical pipe with excellent earthquake resistance. [Effects of the Invention]

[0022] According to this invention, the attachment device includes a reinforcing member bending roller and a second reaction force receiving roller, so that the reinforcing member can be appropriately bent to a predetermined curvature, thereby enabling the reinforcing member to be appropriately attached and a high-strength spiral tube to be appropriately formed.

[0023] The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the preferred embodiments, which proceeds with reference to the accompanying drawings. [Brief explanation of the drawings]

[0024] [Figure 1] 1 is a diagrammatic illustration showing the process of rehabilitating an existing pipe using a pipe making machine according to an embodiment of the present invention. [Figure 2] FIG. 2 is a perspective view showing a spiral pipe formed by a pipe making machine. [Figure 3] FIG. 2 is a perspective view showing an example of a lining member provided in a pipe rehabilitation member. [Figure 4] FIG. 4 is a cross-sectional view showing the lining member of FIG. 3. [Figure 5] FIG. 2 is a perspective view showing an example of a connecting member provided in a pipe rehabilitation member. [Figure 6] FIG. 6 is a cross-sectional view showing the connecting member of FIG. 5. [Figure 7] FIG. 2 is a perspective view showing an example of a reinforcing member provided in a pipe rehabilitation member. [Figure 8] FIG. 8 is a cross-sectional view showing the reinforcing member of FIG. 7. [Figure 9] 10A and 10B are diagrams showing how a spiral pipe is formed using a pipe rehabilitation member. [Figure 10]FIG. 2 is an enlarged view showing the periphery of a reinforcing member of a spiral tube. [Figure 11] 1 is a front view showing a pipe making machine according to an embodiment of the present invention. [Figure 12] FIG. 12 is a plan view showing the pipe making machine of FIG. [Figure 13] FIG. 12 is a left side view showing the pipe making machine of FIG. [Figure 14] FIG. 12 is a right side view showing the pipe making machine of FIG. [Figure 15] 12 is a front view showing a spiral winding guide device provided in the pipe making machine of FIG. 11. [Figure 16] FIG. 16 is a development view showing the spiral winding guide device of FIG. 15. [Figure 17] 12 is a front view showing a lining member feeding device provided in the pipe making machine of FIG. 11. [Figure 18] FIG. 18 is a left side view showing the lining member feeding device of FIG. [Figure 19] 18 is a cross-sectional view showing the periphery of a lining member feeding roller of the lining member feeding device of FIG. 17. FIG. [Figure 20] 18 is a plan view showing a four-way guide roller provided in the lining member feeding device of FIG. 17. FIG. [Figure 21] 18 is a cross-sectional view showing the periphery of a group of buckling prevention guide rollers of the lining member feeding device of FIG. 17. FIG. [Figure 22] 12 is a front view showing a connecting member guide device provided in the pipe making machine of FIG. 11. [Figure 23] 12 is a front view showing a reinforcing-member feed bending device provided in the pipe making machine of FIG. 11. [Figure 24] 12 is a front view showing a connecting device provided in the pipe making machine of FIG. 11. [Figure 25] FIG. 25 is a right side view showing the coupling device of FIG. 24. [Figure 26] 25 is a cross-sectional view showing the peripheral portion of a fitting roller and a reaction force receiving roller of the connecting device of FIG. 24. FIG. [Figure 27] 12 is a front view showing an attachment device provided in the pipe making machine of FIG. 11. [Figure 28] FIG. 28 is a plan view showing the mounting device of FIG. 27. [Figure 29] FIG. 28 is a cross-sectional view showing the mounting device of FIG. 27. [Figure 30] 28 is a diagram showing the positional relationship of each roller in the mounting device of FIG. 27. [Figure 31] FIG. 12 is a diagram showing the pipe making machine of FIG. 11 installed inside a manhole. [Figure 32] FIG. 10 is a diagram showing another example of a pipe rehabilitation member. [Figure 33] FIG. 10 is a diagram showing yet another example of a pipe rehabilitation member. DETAILED DESCRIPTION OF THE INVENTION

[0025] 1 and 2, a pipe manufacturing machine 60 according to one embodiment of the present invention is a pipe manufacturing machine of a head-pushing type that forms (manufactures) a helical pipe 202 (rehabilitation pipe) for rehabilitating an existing pipe 200 within a manhole 210 and extrudes it into the existing pipe 200. As will be described in detail below, the pipe manufacturing machine 60 spirally winds a lining member 12 and connects adjacent side edges of the helically wound lining member 12 with a connecting member 14. The helical pipe 202 is then formed by attaching a reinforcing member 16 to the lining member 12 so as to straddle and cover the connected portions of the lining member 12. The formed helical pipe 202 is then laid within the existing pipe 200 by sequentially feeding the formed helical pipe 202 into the existing pipe 200.

[0026] The pipe manufacturing machine 60 according to the present invention can be used to rehabilitate various existing pipes 200, such as those made of reinforced concrete, synthetic resin, and metal. The pipe manufacturing machine 60 is particularly suitable for rehabilitating sewer pipes having a diameter of 300 mm or more and 1000 mm or less, and is particularly suitable for rehabilitating sewer pipes having a diameter of 800 mm or more and 1000 mm or less. However, the pipe manufacturing machine 60 can also be used to rehabilitate existing pipes 200 having a diameter of 1000 mm or more.

[0027] Furthermore, the helical pipe 202 formed by this pipe making machine 60 is reinforced by the reinforcing member 16, so it is basically used as a self-supporting pipe that maintains its strength independently from the existing pipe 200. However, the helical pipe 202 can also be used as a composite pipe that is integrated with the existing pipe 200 using a filler material.

[0028] First, before describing the pipe making machine 60 in detail, we will explain an example of the pipe rehabilitation member 10 used in this embodiment. However, the specific configuration and shape of the pipe rehabilitation member 10 described below are merely examples and are not limited to these.

[0029] As shown in FIGS. 1 and 2 , the pipe rehabilitation member 10 is a member for forming a helical pipe 202 and includes a lining member 12, a connecting member 14 for connecting the side edges of the lining member 12, and a reinforcing member 16 for reinforcing the connecting portion of the lining member 12. In this embodiment, the lining member 12 has fitting portions (first fitting portion 22, protrusions 34) for fitting with the connecting member 14 and the reinforcing member 16 on its outer surface when wound in a spiral shape. The connecting member 14 is attached to the lining member 12 from the outer surface side of the spirally wound lining member 12. The reinforcing member 16 is attached to the lining member 12 from the outer surface side of the lining member 12 so as to straddle and cover the connecting portion of the lining members 12 connected by the connecting member 14. The configurations of the lining member 12, the connecting member 14, and the reinforcing member 16 will be described below.

[0030] 3 and 4, the lining member 12 is a long member that serves as the main constituent element of the helical pipe 202, and includes a strip-shaped substrate 20 (lining substrate). One main surface 20a of the substrate 20 is a smooth surface that forms the inner surface of the helical pipe 202. The width of the substrate 20 is, for example, 75 mm, and the thickness (wall thickness) of the substrate 20 is, for example, 2.5 mm.

[0031] On the other main surface 20b of the base 20, i.e., on both sides of the outer surface when the lining member 12 is spirally wound, first fitting portions 22 are formed to fit with second fitting portions 42 of the connecting member 14, which will be described later. The first fitting portions 22 are groove-shaped and include first ridges 24 and second ridges 26 extending in the longitudinal direction of the base 20. The first ridges 24 are formed on both side edges of the other main surface 20b of the base 20, and the second ridges 26 are formed more inward in the width direction of the base 20 than the first ridges 24. A first locking piece 24a that protrudes inward in the width direction of the base 20 is formed at the tip of one side surface of the first ridge 24 (the inner surface in the width direction of the base 20). This first locking piece 24a is engaged with a second locking piece 42a of a second fitting portion 42 of the connecting member 14. Additionally, the second ridges 26 cooperate with the first ridges 24 to clamp the second fitting portions 42 of the connecting member 14 .

[0032] A water-stopping member 28 formed in the shape of a long round rod from an elastic material such as elastomer is provided inside the first fitting portion 22, i.e., on the other main surface 20b side of the base 20 between the first ridges 24 and the second ridges 26. When the first fitting portion 22 of the lining member 12 and the second fitting portion 42 of the connecting member 14 are fitted together, the water-stopping member 28 is sandwiched between the other main surface 20b of the base 20, one side of the first ridges 24, and the tip of the second fitting portion 42, and is thereby compressed (see FIG. 10 ). This water-stopping member 28 ensures water-tightness (watertightness) at the connecting portion of the lining member 12.

[0033] Furthermore, a displacement absorbing section 30 is formed in the widthwise center of the base 20, with a portion of the base 20 loosened in the width direction so as to protrude toward the other main surface 20b. The displacement absorbing section 30 has a pair of side walls 30a that widen in the width direction as they move away from the one main surface 20a, and a connecting section 30b that connects the tip ends of the side walls 30a. A gap 32 is formed between the base ends of the displacement absorbing section 30. The protrusion height of the displacement absorbing section 30 from the other main surface 20b is, for example, 12 mm, and the width of the gap 32 is, for example, 1 mm. By including such a displacement absorbing section 30 in the base 20, the helical pipe 202 formed using the lining member 12 is easily deformed in the axial and bending directions at the displacement absorbing section 30. Therefore, when the helical pipe 202 is fed into the existing pipe 200, the helical pipe 202 can follow the curves, bends, and steps of the existing pipe 200. Furthermore, when an earthquake occurs after the helical pipe 202 is installed, the displacement absorbing portion 30 expands to absorb the axial displacement, thereby suppressing deformation of the connecting portion of the lining member 12.

[0034] Furthermore, protrusions 34 (third protrusions) extending in the longitudinal direction of the base 20 are formed on both side edges of the other main surface 20b of the base 20, on the inside in the width direction of the base 20 of the second protrusions 26. At the tip of one side surface (the inner surface in the width direction of the base 20) of this protrusion 34, claw portions 34a are formed that protrude toward the inside in the width direction of the base 20. These claw portions 34a function as locking portions that lock onto the locked portions (tips of the extension portions 56) of the reinforcing member 16, which will be described later. The protrusion height of the protrusions 34 from the other main surface 20b is, for example, 14 mm, and the width (thickness) of the protrusions 34 is, for example, 3 mm. The protrusion height of the claw portions 34a from one side surface of the protrusions 34 is, for example, 2 mm.

[0035] Such a lining member 12 is integrally formed by extrusion molding of a synthetic resin such as polyethylene resin, polypropylene resin, nylon resin, fluororesin, or rigid polyvinyl chloride resin. The first fitting portions 22 (first ridges 24 and second ridges 26), displacement absorbing portions 30, and ridges 34 are formed over the entire longitudinal length of the base body 20. The lining member 12 of this embodiment is formed from high-density polyethylene resin. The water-stopping member 28 is provided over the entire longitudinal length of the base body 20 by co-extrusion.

[0036] 5 and 6, the connecting member 14 is a long member for connecting the side edges of the lining member 12, and includes a strip-shaped base body 40 (connecting base body). The width of the base body 40 is, for example, 22 mm, and the thickness of the base body 40 is, for example, 3 mm.

[0037] One main surface 40a of the base 40 is the surface facing the other main surface 20b of the base 20 of the lining member 12, and second fitting portions 42 are formed on both sides of the one main surface 40a of the base 40 to fit into the first fitting portions 22 of the lining member 12. The second fitting portions 42 are protrusions extending in the longitudinal direction of the base 40, and a second locking piece 42a to engage with the first locking piece 24a of the lining member 12 is formed at the tip of one side surface of the second fitting portion 42 (the inner surface in the width direction of the base 40).

[0038] Such a connecting member 14 is integrally formed by extrusion molding of a synthetic resin such as polyethylene resin, polypropylene resin, nylon resin, fluororesin, or hard vinyl chloride resin. The connecting member 14 of this embodiment is formed of high-density polyethylene resin, and the second fitting portion 42 is formed over the entire length of the base body 40 in the longitudinal direction.

[0039] 7 and 8, the reinforcing member 16 is a long member for reinforcing the connecting portion of the lining member 12, i.e., the portion where the side edges of the lining member 12 are connected by the connecting member 14, and includes a reinforcing base 50. The reinforcing base 50 is formed in a groove shape (half-rectangular cylindrical shape) including a strip-shaped top wall 52 and a pair of strip-shaped side walls 54 extending from both side edges of the top wall 52. One main surface 52a of the top wall 52 faces the other main surface 20b of the base 20 of the lining member 12, and each of the side walls 54 extends in a direction perpendicular to the top wall 52 from both side edges of the top wall 52 toward the lining member 12 side. In other words, the reinforcing base 50 is formed in a groove shape that opens toward the lining member 12 side.

[0040] Furthermore, an extension portion 56 that fits with the lining member 12 is formed at the tip of each side wall 54, i.e., at each edge of the opening of the reinforcing base 50. In this embodiment, the extension portion 56 extends from the tip of the side wall 54 toward the inside in the width direction of the reinforcing base 50. The extension portion 56 includes a first piece 56a that bends from the tip of the side wall 54 and extends parallel to the top wall 52, and a second piece 56b that bends from the tip of the first piece 56a and extends diagonally toward the top wall 52. The tip of the second piece 56b of this extension portion 56 functions as a locked portion that is locked by a locking portion (claw portion 34a) of the lining member 12.

[0041] The material of the reinforcing member 16 is not particularly limited, but is preferably a metal such as steel, stainless steel, titanium, or aluminum alloy from the viewpoint of high rigidity. In this embodiment, the reinforcing member 16 is formed by bending a strip-shaped steel material (steel plate) into the above-mentioned shape. The thickness of the reinforcing member 16 is, for example, 1.6 mm. The width of the reinforcing member 16 (the width of the top wall 52) is set larger than the width of the connecting member 14 (the width of the base 40), for example, 50 mm. The height of the reinforcing member 16 (the height of the side wall 54) is set larger than the height of the connecting member 14, for example, 20 mm. Such a reinforcing member 16 is attached over the entire length of the connecting portion of the lining member 12.

[0042] Referring to Figures 9 and 10 as well as Figure 2, when forming a spiral pipe 202 using the above-mentioned pipe rehabilitation member 10, adjacent side edge portions of the spirally wound lining member 12 are connected by a connecting member 14, and a reinforcing member 16 is attached to the lining member 12 so as to straddle and cover the connecting portion of the lining member 12 including the connecting member 14.

[0043] Briefly, when connecting the side edges of the lining members 12 with the connecting members 14, the side edges of the bases 20 of the lining members 12 are butted together so that the first main surfaces 20a of the bases 20 are flush with each other. Then, the connecting members 14 are pushed in from the outer surface side of the spirally wound lining member 12, and the second fitting portions 42 of the connecting members 14 are fitted sequentially into the first fitting portions 22 of the lining members 12 in the longitudinal direction (spiral direction). As a result, the second fitting portions 42 are sandwiched between the first ridges 24 and the second ridges 26 of the first fitting portions 22, and the first locking pieces 24a of the first ridges 24 engage with the second locking pieces 42a of the second fitting portions 42, and the side edges of the lining members 12 are connected by the connecting members 14.

[0044] Furthermore, when attaching the reinforcing member 16 to the connecting portion of the lining member 12, the reinforcing member 16 is pushed in from the outer surface side of the lining member 12 so as to bridge between adjacent side edge portions of the lining member 12, and the extending portion 56 of the reinforcing member 16 is successively fitted in the longitudinal direction (spiral direction) onto the protruding strips 34 of the lining member 12. Then, the tip end of the extending portion 56 of the reinforcing member 16 is locked by the claw portion 34a of the lining member 12, and the reinforcing member 16 is attached to the lining member 12 so as to straddle and cover the connecting portion of the lining member 12 including the connecting member 14.

[0045] Next, the configuration of the pipe making machine 60 will be described in detail. In this specification, the axial direction of the existing pipe 200 to be rehabilitated is defined as the front-to-rear direction, and the direction in which the spiral pipe 202 formed by the pipe making machine 60 is pushed out is defined as the front direction, and the front-to-rear direction of the pipe making machine 60 is defined as the direction in which the pipe making machine 60 is viewed from the side of the existing pipe 200 to be rehabilitated (i.e., the front side). Furthermore, the left-to-right direction of the pipe making machine 60 is defined based on the state when the pipe making machine 60 is viewed from the side of the existing pipe 200 to be rehabilitated (i.e., the front side).

[0046] 11 to 14, the pipe making machine 60 is equipped with a spiral winding guide device 62 that guides the lining member 12 so that it is wound spirally. Attached to this spiral winding guide device 62 are a lining member feeding device 64, a connecting member guide device 66, a reinforcing member feeding and bending device 68, a connecting device 70, an attachment device 72, and legs 74.

[0047] The arrangement (circumferential position) of each device 64, 66, 68, 70, 72 relative to the spiral winding guide device 62 is not particularly limited, but it is preferable that the attachment device 72 be arranged at the top of the spiral winding guide device 62 (pipe making machine 60). Furthermore, it is preferable that the introduction portions (entrances) of each member 12, 14, 16 in the lining member feeding device 64, the connecting member guide device 66, and the reinforcing member feeding and bending device 68 be arranged together in the upper half of the pipe making machine 60, on either the left or right side (i.e., one side) of the attachment device 72. Furthermore, it is preferable that the connecting device 70 be arranged in the upper half of the pipe making machine 60, on the other side of the attachment device 72, i.e., on the opposite side from the introduction portions of each device 64, 66, 68 sandwiching the attachment device 72. This allows the width of the pipe making machine 60 as a whole to be reduced, making it possible to suitably install the pipe making machine 60 even in a narrow manhole 210.

[0048] In this embodiment, the attachment device 72 is disposed near the top (i.e., the 0 o'clock direction) of the spiral winding guide device 62. Furthermore, when viewing the pipe making machine 60 from the side of the existing pipe 200 to be rehabilitated, the introduction points of each of the lining member feeding device 64, connecting member guide device 66, and reinforcing member feeding and bending device 68 are disposed near a circumferential position 45 degrees counterclockwise from the top of the spiral winding guide device 62 (i.e., the 10:30 direction). Furthermore, the connecting device 70 is disposed near a circumferential position 45 degrees clockwise from the top of the spiral winding guide device 62 (i.e., the 1:30 direction).

[0049] 15 and 16, the spiral winding guide device 62 includes a plurality of outer guide rollers 80 that guide the lining member 12 so as to wind it spirally, and a cylindrical frame member 82 that holds the plurality of outer guide rollers 80. The frame member 82 is formed from a metal such as stainless steel, and has a cylindrical portion 82a, a first annular plate portion 82b that protrudes outward from the front end edge of the cylindrical portion 82a, and a second annular plate portion 82c that protrudes inward from the rear end edge of the cylindrical portion 82a.

[0050] Each of the outer guide rollers 80 includes a pair of rollers spaced apart in the front-to-rear direction (i.e., the width direction of the lining member 12) and rotatably mounted on a rotating shaft attached to the inner surface of the cylindrical portion 82a via a bearing such as a deep groove ball bearing. The pair of rollers is made of metal, and their outer peripheral surfaces are smooth cylindrical surfaces with no irregularities in the circumferential direction. The outer guide rollers 80 are arranged spirally at intervals in the circumferential direction of the cylindrical portion 82a (and thus in the circumferential direction of the existing pipe 200 and the helical pipe 202), and the axial direction of each outer guide roller 80 is inclined at a predetermined angle with respect to the axial direction of the frame member 82. The outer guide rollers 80 are preferably arranged over at least two revolutions (720 degrees) of the spirally wound lining member 12; in this embodiment, they are arranged over approximately 3.4 revolutions (approximately 1200 degrees) of the lining member 12.

[0051] The distance W1 between the outer guide rollers 80 in the front-to-rear direction is set to be the same as the width of the base body 20 of the lining member 12 so that the side edges of the base body 20 of the spirally wound lining member 12 can abut against each other. The distance W2 between the pair of rollers provided in each outer guide roller 80 in the front-to-rear direction is set to be a distance that allows each of the pair of rollers to enter between the protrusion 34 of the lining member 12 and the displacement absorbing section 30 and abut against the other main surface 20b of the base body 20. However, at positions where there is interference with the connecting device 70, the mounting device 72, etc., or in the front portion of the spiral winding guide device 62, one of the pair of rollers provided in the outer guide rollers 80 may be omitted, or the circumferential distance between the outer guide rollers 80 may be changed.

[0052] Such a plurality of outer guide rollers 80 guide the lining member 12 so that it winds in a spiral while the side edges of adjacent base bodies 20 abut against each other. By arranging the outer guide rollers 80 in a spiral arrangement, the lining member 12 can be appropriately guided in a spiral manner, and each of the pair of rollers constituting the outer guide rollers 80 can be inserted between the protrusions 34 of the lining member 12 and the displacement absorbing section 30, thereby automatically positioning the lining member 12 in the axial direction of the helical pipe 202. In particular, by abutting the side edges of adjacent base bodies 20 against each other, the lining member 12 can be more appropriately positioned in the axial direction of the helical pipe 202.

[0053] Furthermore, the outer guide rollers 80 abut against the other main surface 20b of the base body 20 of the spirally wound lining member 12 (i.e., the outer surface of the lining member 12), thereby defining the outer diameter of the helical pipe 202. This allows the helical pipe 202 to be formed to a constant size based on the outer diameter. Furthermore, each of the outer guide rollers 80 pushes the formed helical pipe 202 forward (toward the existing pipe 200) by the front side surfaces of the pair of rollers abutting against the first fitting portion 22 of the lining member 12 or the rear side surface of the connecting member 14. By each of the outer guide rollers 80 pushing the helical pipe 202, the pushing force can be increased, and the helical pipe 202 can be appropriately pushed into the existing pipe 200.

[0054] 16, openings are formed in the cylindrical portion 82a of the frame member 82 for attaching the devices 64, 66, 68, and 70 and for guiding the components 12, 14, and 16 into the cylindrical portion 82a (into the spiral winding guide device 62). Specifically, a first opening 82d into which the lining member feeding device 64 is fitted is formed upstream of the outer guide roller 80 located at the most upstream side, near the 10 o'clock direction when viewing the pipe making machine 60 from the existing pipe 200 side. This first opening 82d serves as the entrance for the lining member 12 into the spiral winding guide device 62. A second opening 82e into which the downstream end of the connecting member guide device 66 is fitted is formed between the outer guide rollers 80 located approximately one-half revolution and one-and-a-half revolutions from the most upstream side, near the 2:30 o'clock direction when viewing the pipe making machine 60 from the existing pipe 200 side. This second opening 82e serves as an entrance for the connecting member 14 into the spiral winding guide device 62. Furthermore, a third opening 82f is formed downstream of the second opening 82e, near the 1:30 direction when looking at the pipe making machine 60 from the existing pipe 200 side, into which the connecting device 70 is fitted. Furthermore, a fourth opening 82g is formed near the 3 o'clock direction when looking at the pipe making machine 60 from the existing pipe 200 side, in front of the outer guide roller 80, which is located approximately two and a half revolutions behind the most upstream side. This fourth opening 82g serves as an entrance for the reinforcing member 16 into the spiral winding guide device 62, and into which the push-in roller 94 of the reinforcing member feed and bending device 68 is fitted. Furthermore, a fifth opening 82h is formed downstream of the fourth opening 82g, near the 0 o'clock direction when looking at the pipe making machine 60 from the existing pipe 200 side, into which the attachment device 72 is fitted.

[0055] 17 to 21, the lining member feed device 64 is a device that feeds the lining member 12 supplied from the ground into the spiral winding guide device 62, and includes a feed device main body 84, a four-way guide roller 86, and a group of buckling prevention guide rollers 88. The lining member feed device 64 is fixed to the frame member 82 of the spiral winding guide device 62 using fastening members such as bolts. At this time, the group of buckling prevention guide rollers 88 is fitted into a first opening 82d of the frame member 82.

[0056] The feed device main body 84 includes a pair of rollers, i.e., a lining member feed roller 84a and a reaction force receiving roller 84b, which are arranged to sandwich the lining member 12 in the thickness direction. The lining member feed roller 84a is arranged on the inner surface side (one main surface 20a side) of the lining member 12, and the reaction force receiving roller 84b is arranged on the outer surface side (the other main surface 20b side) of the lining member 12.

[0057] The lining member feed roller 84a is rotatably mounted via a bearing so as to extend in the front-rear direction. The lining member feed roller 84a has a cylindrical metal base body and an outer circumferential portion (surface layer) formed of a soft material such as urethane rubber and provided to cover the base body, and the outer circumferential surface is a smooth cylindrical surface without any irregularities in the circumferential direction. A motor 84c such as a hydraulic motor is connected to the lining member feed roller 84a. The lining member feed roller 84a is driven to rotate by receiving a driving force from the motor 84c, and rotates while pressing against the inner surface of the lining member 12 (specifically, one main surface 20a of the base body 20), thereby applying a propulsive force to the lining member 12 toward the spiral winding guide device 62.

[0058] On the other hand, the reaction force receiving roller 84b is rotatably mounted via a bearing at a position opposite the lining member feed roller 84a. The reaction force receiving roller 84b is made of metal, and its outer circumferential surface is formed to match the shape of the outer surface side of the lining member 12. In this embodiment, the outer surface side of the lining member 12 is formed so that the protrusions 34 protrude most, and therefore an annular groove is formed on the outer circumferential surface of the reaction force receiving roller 84b, into which the tip ends of the protrusions 34 can be fitted. The reaction force receiving roller 84b is rotated while pressing against the outer surface side of the lining member 12 as the lining member feed roller 84a is rotated (transporting the lining member 12). Furthermore, fitting the tip ends of the protrusions 34 into the annular groove restricts movement of the lining member 12 in the width direction. The lining member feed roller 84a and the reaction force receiving roller 84b may be arranged in reverse, so that the lining member feed roller 84a, which is the drive roller, presses the outer surface side of the lining member 12.

[0059] The four-way guide roller 86 is an introduction portion of the lining member 12 in the lining member feeding device 64 and is provided upstream of the feeding device main body 84 in the feeding direction of the lining member 12. The four-way guide roller 86 has at least four regulating rollers rotatably provided to surround the inner and outer surfaces and both side surfaces of the lining member 12. In this embodiment, the four-way guide roller 86 is made of metal and includes two pairs of rollers 86a for regulating the lining member 12 in the thickness direction, spaced apart in the feeding direction, and a pair of rollers 86b for regulating the lining member 12 in the width direction, provided between the roller pairs 86a. The four-way guide roller 86 guides the lining member 12 between the lining member feeding roller 84a and the reaction force receiving roller 84b while restricting movement of the lining member 12 in the thickness direction and width direction. The provision of the four-way guide roller 86 allows the lining member 12 to be smoothly guided between the lining member feeding roller 84a and the reaction force receiving roller 84b.

[0060] The buckling prevention guide roller group 88 is provided downstream of the feed device main body 84 in the feed direction of the lining member 12. The buckling prevention guide roller group 88 includes multiple roller pairs 88a rotatably arranged to sandwich the lining member 12 from the outer and inner sides. In this embodiment, each roller pair 88a is made of metal and includes a pair of rollers 88b arranged at positions corresponding to both widthwise ends of the lining member 12. That is, the roller pair 88a includes four rollers 88b arranged to sandwich both widthwise ends of the lining member 12 from the outer and inner sides. These multiple roller pairs 88a are arranged linearly along the feed direction of the lining member 12, connecting the lining member feed roller 84a and the outer guide roller 80, which is arranged most upstream of the spiral winding guide device 62. In addition, a rectangular restriction frame 88c is provided at the downstream end of the buckling prevention guide roller group 88 so as to surround the roller pairs 88a. The buckling prevention guide roller group 88 guides the lining member 12 into the spiral winding guide device 62 while restricting movement of the lining member 12 in the thickness direction by the multiple roller pairs 88a. Movement of the lining member 12 in the width direction is restricted by the restricting frame 88c. By providing the buckling prevention guide roller group 88, the lining member 12 can be smoothly guided into the spiral winding guide device 62 while preventing buckling of the lining member 12.

[0061] As shown in FIG. 22 , the connecting member guide device 66 is a device that guides the connecting members 14 supplied from the ground into the connecting device 70, and is formed in a cylindrical shape from metal such as stainless steel. The connecting member guide device 66 has an introduction section 66a (upstream end) that receives the connecting members 14, which is provided near the 10:30 o'clock direction. The connecting member guide device 66 passes outside the lower half of the cylindrical section 82a of the frame member 82 included in the spiral winding guide device 62 and extends to a position near the connecting device 70, and its outlet section 66b (downstream end) is fitted into a second opening 82e of the frame member 82. Furthermore, a bulge section 66c that bulges radially outward from the frame member 82 is formed upstream of the outlet section 66b, and the outlet section 66b extends linearly along a tangential direction at the fitting position of the lining member 12.

[0062] By providing such a connecting member guide device 66, the connecting member 14 can be smoothly guided to the connecting device 70, and the side edge portions of the lining member 12 can be properly connected to each other by the connecting member 14 at the connecting device 70. Furthermore, by forming the connecting member guide device 66 into a cylindrical shape, the connecting member 14 is prevented from coming into contact with water inside the manhole 210 and becoming dirty, and from being covered with debris such as shavings.

[0063] As shown in Figure 23, the reinforcing member feeding and bending device 68 is a device that guides and transports the reinforcing member 16 supplied from the ground to the mounting device 72 while preliminarily bending the reinforcing member 16. The reinforcing member feeding and bending device 68 includes a reinforcing member feeding device 90, a group of bending rollers 92, and a push-in roller 94. The reinforcing member feeding and bending device 68 is fixed to the frame member 82 of the spiral winding guide device 62 using fastening members such as bolts. In this case, the group of bending rollers 92 is arranged so as to follow the outer peripheral surface of the lower half of the cylindrical portion 82a of the frame member 82.

[0064] The reinforcing member feeding device 90 is a device that feeds the reinforcing member 16 into the bending roller group 92 (and thus the mounting device 72), and includes a pair of rollers, namely, a reinforcing member feeding roller 90a and a reaction force receiving roller 90b, that are arranged to sandwich the reinforcing member 16 in the thickness direction. The reinforcing member feeding roller 90a is arranged on the outer surface side of the reinforcing member 16, and the reaction force receiving roller 90b is arranged on the inner surface side of the reinforcing member.

[0065] The reinforcing member feed roller 90a is rotatably mounted via bearings so as to extend in the front-rear direction. The reinforcing member feed roller 90a is made of metal, and flange-shaped restricting portions that restrict movement of the reinforcing member 16 in the width direction are formed on the outer peripheral surface at both ends of the reinforcing member feed roller 90a. Meanwhile, the reaction force receiving roller 90b is rotatably mounted via bearings at a position facing the reinforcing member feed roller 90a. A motor 90c (see FIG. 13 ), such as a hydraulic motor, is connected to the reaction force receiving roller 90b. The reinforcing member feed roller 90a is connected to the reaction force receiving roller 90b via a gear train 90d, and the reinforcing member feed roller 90a and the reaction force receiving roller 90b are rotated by receiving a driving force from the motor 90c. The reinforcing member feed roller 90a and the reaction force receiving roller 90b rotate while pressing against the inner and outer surfaces of the reinforcing member 16, thereby applying a propulsive force to the reinforcing member 16 toward the mounting device 72. The reinforcing member feed roller 90a is provided so as to be movable in a direction in which it approaches and separates from the reaction force receiving roller 90b, and the distance between the reinforcing member feed roller 90a and the reaction force receiving roller 90b can be adjusted.

[0066] The bending roller group 92 is provided downstream of the reinforcing member feed device 90 in the feed direction of the reinforcing member 16 and bends the reinforcing member 16 into an arc while guiding it to the push roller 94. The bending roller group 92 forms a movement path for the reinforcing member 16 along the outer peripheral surface of the cylindrical portion 82a of the frame member 82. The bending roller group 92 includes a plurality of inner rollers 92a that contact the inner surface of the reinforcing member 16 and a plurality of outer rollers 92b that contact the outer surface of the reinforcing member 16. The inner rollers 92a and the outer rollers 92b are made of metal, and their axial directions are the same as (parallel to) the axial direction of the outer guide roller 80. The arrangement range of the bending roller group 92 is not particularly limited, but in this embodiment, the bending roller group 92 is arranged over a range covering approximately half the circumference of the cylindrical portion 82a, from the 10 o'clock direction to the 4:30 direction when viewing the pipe making machine 60 from the existing pipe 200 side. In this case, in the central portion of the arrangement range of the bending roller group 92, the arrangement intervals between the inner rollers 92a and the outer rollers 92b may be set large.

[0067] The push-in roller 94 is a roller that pushes the reinforcing member 16, which has been fed along the outer peripheral surface of the cylindrical portion 82a of the frame member 82, into the cylindrical portion 82a. The axial direction of the push-in roller 94 is the same direction as (parallel to) the axial direction of the outer guide roller 80. The push-in roller 94 is fitted into a fourth opening 82g of the frame member 82 of the spiral winding guide device 62, and a portion of the push-in roller 94 protrudes into the cylindrical portion 82a of the frame member 82. The push-in roller 94 is provided so as to be movable in the radial direction of the cylindrical portion 82a (i.e., the helical tube 202), making it possible to adjust the amount by which the reinforcing member 16 is pushed in.

[0068] By providing such a reinforcing member feeding device 90, the reinforcing member 16 can be smoothly guided to the attachment device 72 and can be preliminarily bent and formed. Therefore, the reinforcing member 16 can be appropriately attached to the lining member 12 in the attachment device 72.

[0069] 24 to 26, the connecting device 70 is a device that connects adjacent side edge portions of the spirally wound lining member 12. In this embodiment, the connecting device 70 connects adjacent side edge portions of the lining member 12 by abutting the adjacent side edge portions of the lining member 12 against each other and fitting the connecting member 14 from the outer surface side of the lining member 12.

[0070] Specifically, the connecting device 70 includes a pair of rollers, namely, an engaging roller 100 and a reaction force receiving roller 102, which are arranged to sandwich the connecting portion of the lining member 12 including the connecting member 14 in the thickness direction. The connecting device 70 is fixed to the frame member 82 of the spiral winding guide device 62 using fastening members such as bolts. At this time, the engaging roller 100 is fitted into the third opening 82f of the frame member 82 of the spiral winding guide device 62, and a portion of the engaging roller 100 protrudes into the cylindrical portion 82a of the frame member 82.

[0071] The axial direction of the fitting roller 100 and the reaction force receiving roller 102 is the same direction (parallel) as the axial direction of the outer guide roller 80. The fitting roller 100 and the reaction force receiving roller 102 are provided at axial positions spanning a position approximately 0.65 revolutions (approximately 225 degrees) and a position approximately 1.65 revolutions (approximately 585 degrees) after the lining member 12 is conveyed into the frame member 82 of the spiral winding guide device 62. One of the outer guide rollers 80 is provided behind the circumferential position at which the fitting roller 100 is provided. This outer guide roller 80 abuts against the outer surface of the lining member 12 to be newly fitted. By providing the outer guide roller 80 at the same circumferential position as the fitting roller 100, the stability of the fitting between the lining member 12 and the connecting member 14 can be improved.

[0072] The engaging roller 100 is made of metal and is rotatably mounted via a bearing so as to abut against the outer surface of the connecting member 14. The outer peripheral surface of the engaging roller 100 is also treated with an anti-slip coating. In this embodiment, the outer peripheral surface of the engaging roller 100 is formed into a rough surface with a plurality of fine irregularities. This anti-slip coating prevents slippage between the engaging roller 100 and the connecting member 14, and ensures that the rotational driving force of the engaging roller 100 is appropriately transmitted to the connecting member 14 (and ultimately the helical tube 202). However, if the engaging roller 100 is made of a material that does not cause slippage between the engaging roller 100 and the connecting member 14, it is not necessarily necessary to treat the outer peripheral surface of the engaging roller 100 with an anti-slip coating.

[0073] A motor 106, such as a hydraulic motor, is connected to the engaging roller 100 via a gear section 104. The engaging roller 100, gear section 104, and motor 106 are integrally held by a support frame 108. This support frame 108 is biased toward the reaction force receiving roller 102 by a compression coil spring 110, which enables the engaging roller 100 to press the outer surface of the connecting member 14 with a predetermined pressing force (for example, 100 kgf). The pressing force of the engaging roller 100 against the connecting member 14 can also be changed by changing the amount of pressing of the bolt 112.

[0074] The fitting roller 100 is driven to rotate by receiving a driving force from a motor 106, and rotates while pressing the connecting portion of the lining member 12 (specifically, the base body 40 of the connecting member 14) from the outer surface side, thereby fitting the second fitting portion 42 of the connecting member 14 into the first fitting portion 22 of the lining member 12 and applying a rotational force to the formed spiral tube 202. Furthermore, by rotating while pressing the connecting member 14 from the outer surface side, the fitting roller 100 sequentially draws the connecting member 14 into the connecting device 70 without providing a drive unit to the connecting member guide device 66. Furthermore, by rotating while pressing the connecting member 14 from the outer surface side, the fitting roller 100 additionally applies a propulsive force to the lining member 12 to draw the lining member 12 into the spiral winding guide device 62. That is, in this embodiment, the lining member 12 is fed by the driving forces of both the connecting device 70 and the lining member feeding device 64, while the connecting members 14 are fitted successively onto adjacent side edges of the lining member 12.

[0075] On the other hand, the reaction force receiving roller 102 is rotatably mounted via a bearing at a position facing the engaging roller 100. The reaction force receiving roller 102 has a cylindrical metal base body and an outer periphery formed of a soft material such as urethane rubber and covering the base body. The outer periphery is a smooth cylindrical surface without any irregularities in the circumferential direction. A motor 114, such as a hydraulic motor, is connected to the reaction force receiving roller 102. The reaction force receiving roller 102 is driven to rotate by the driving force from the motor 114 and presses the inner side of the connecting portion of the lining member 12 (specifically, a position straddling one main surface 20a of the adjacent base bodies 20) so as to sandwich the connecting portion of the lining member 12 between the engaging roller 100 and the reaction force receiving roller 102. In addition to receiving the reaction force from the engaging roller 100, the reaction force receiving roller 102 also functions as a shape correcting roller that adjusts the shape of the helical tube 202 into a cylindrical shape by rotating while pressing the inner side of the lining member 12. Furthermore, the reaction force receiving roller 102 rotates while pressing the inner surface of the lining member 12 , thereby providing the lining member 12 with an auxiliary propulsive force that draws the lining member 12 into the spiral winding guide device 62 .

[0076] 27 to 30, the attachment device 72 is a device for attaching the reinforcing member 16 to the lining member 12 from the outer surface side of the lining member 12 so as to straddle and cover the connecting portion of the lining member 12. In this embodiment, the reinforcing member 16 is attached to the lining member 12 so as to cover the entire connecting member 14. The attachment device 72 of this embodiment is also a device for bending the reinforcing member 16 attached to the lining member 12 to a predetermined curvature so as to fit along the outer surface of the lining member 12.

[0077] Specifically, the mounting device 72 includes a pair of mounting rollers arranged to sandwich the connecting portion of the lining member 12 including the reinforcing member 16 in the thickness direction, that is, a reinforcing member feed roller 120 and a first reaction force receiving roller 122. The mounting device 72 also includes a pair of bending rollers arranged to sandwich the connecting portion of the lining member 12 including the reinforcing member 16 in the thickness direction, that is, a reinforcing member bending roller 124 and a second reaction force receiving roller 126, downstream of the reinforcing member feed roller 120 and the first reaction force receiving roller 122 in the rotation direction of the helical tube 202 (the feeding direction of the lining member 12, etc.).

[0078] The mounting device 72 is fixed to the frame member 82 of the spiral winding guide device 62 using fastening members such as bolts. At this time, the reinforcing member feed roller 120 and the reinforcing member bending roller 124 are fitted into a fifth opening 82h of the frame member 82 of the spiral winding guide device 62, and portions of the reinforcing member feed roller 120 and the reinforcing member bending roller 124 protrude into the cylindrical portion 82a of the frame member 82. The axial direction of each of the rollers 120, 122, 124, 126 is the same direction as (parallel to) the axial direction of the outer guide roller 80.

[0079] The reinforcing member feed roller 120 is rotatably mounted via a bearing so as to abut against the outer surface of the spiral tube 202 (specifically, the top wall 52 of the reinforcing member 16). The reinforcing member feed roller 120 is mounted at an axial position spanning between a position approximately 2.68 revolutions (approximately 965 degrees) and a position approximately 3.68 revolutions (approximately 1325 degrees) after the lining member 12 is transported into the frame member 82 of the spiral winding guide device 62. The reinforcing member feed roller 120 is made of metal, and is provided with flange-shaped restricting portions 120a on the outer circumferential surface at both ends thereof to restrict movement of the reinforcing member 16 in the width direction.

[0080] On the other hand, the first reaction force receiving roller 122 is rotatably mounted via a bearing at a position opposite the reinforcing member feed roller 120 so as to abut against the inner surface of the helical tube 202 (specifically, one main surface 20a of the base body 20 of the lining member 12). The first reaction force receiving roller 122 is mounted so as to straddle positions of approximately 0.68 revolutions (approximately 245 degrees), approximately 1.68 revolutions (approximately 605 degrees), approximately 2.68 revolutions (approximately 965 degrees), and approximately 3.68 revolutions (approximately 1325 degrees) after the lining member 12 is transported into the frame member 82 of the spiral winding guide device 62, i.e., straddles four windings of the lining member 12. The first reaction force receiving roller 122 has a cylindrical metal base body and an outer circumferential portion formed of a soft material such as urethane rubber and provided so as to cover the base body, and the outer circumferential surface is a smooth cylindrical surface without any irregularities in the circumferential direction.

[0081] The reinforcing member bending roller 124 is a roller that cooperates with a pair of mounting rollers (the reinforcing member feed roller 120 and the first reaction force receiving roller 122) to curve the reinforcing member 16 so that it fits the outer surface of the lining member 12. The reinforcing member bending roller 124 is made of metal, and has flange-shaped restricting portions 124a formed on the outer peripheral surfaces of both ends thereof to restrict movement of the reinforcing member 16 in the width direction. The reinforcing member bending roller 124 is rotatably provided via a bearing so as to abut against the outer surface of the helical tube 202 (the top wall 52 of the reinforcing member 16) at a circumferential position downstream of the reinforcing member feed roller 120 in the rotation direction of the helical tube 202.

[0082] In this case, the reinforcing member bending roller 124 is provided at a predetermined distance from the reinforcing member feed roller 120. This is because if the distance between the reinforcing member feed roller 120 and the reinforcing member bending roller 124 is too close, reverse bending deformation (deformation causing an inward recess) may occur in the reinforcing member 16 that has been previously bent, which may result in an unnecessary load being placed on the reinforcing member 16. The distance between the reinforcing member feed roller 120 and the reinforcing member bending roller 124 is preferably, for example, 15 to 30 degrees in terms of the central angle θ of the helical tube 202, and is 24 degrees in this embodiment. That is, the reinforcing member bending roller 124 in this embodiment is provided at an axial position spanning between a position approximately 2.75 revolutions (approximately 990 degrees) and a position approximately 3.75 revolutions (approximately 1350 degrees) after the lining member 12 is conveyed into the frame member 82 of the spiral winding guide device 62.

[0083] On the other hand, the second reaction force receiving roller 126 is rotatably mounted via a bearing at a circumferential position between the reinforcing member feed roller 120 and the reinforcing member bending roller 124 so as to abut against the inner surface of the helical tube 202 (one main surface 20a of the base body 20). The second reaction force receiving roller 126 is mounted so as to straddle positions of approximately 0.72 revolutions (approximately 258 degrees), approximately 1.72 revolutions (approximately 618 degrees), approximately 2.72 revolutions (approximately 978 degrees), and approximately 3.72 revolutions (approximately 1338 degrees) after the lining member 12 is transported into the frame member 82 of the spiral winding guide device 62, i.e., so as to straddle four windings of the lining member 12. The second reaction force receiving roller 126 has a cylindrical metal base body and an outer circumferential portion formed of a soft material such as urethane rubber and provided so as to cover the base body, and the outer circumferential surface is a smooth cylindrical surface without any irregularities in the circumferential direction.

[0084] The mounting device 72 also includes a motor 128, such as a hydraulic motor, that rotates the reinforcing member feed roller 120. In this embodiment, the motor 128 is connected to the reinforcing member feed roller 120 and the reinforcing member bending roller 124 via a gear train 130, and the reinforcing member feed roller 120 and the reinforcing member bending roller 124 are driven to rotate by the driving force from the motor 128. In other words, the motor 128 that rotates the reinforcing member feed roller 120 also serves as the motor that rotates the reinforcing member bending roller 124. However, separate motors may be provided for the reinforcing member feed roller 120 and the reinforcing member bending roller 124, or the reinforcing member bending roller 124 may be rotated by the motor.

[0085] Furthermore, the reinforcing member feed roller 120, the reinforcing member bending roller 124, the motor 128, etc. are integrally supported by a support frame 132. The support frame 132 is provided so as to be movable in the radial direction of the helical tube 202 (the direction of moving toward and away from the helical tube 202) relative to a fixed frame 134 fixed to the frame member 82 of the spiral winding guide device 62. In other words, the reinforcing member feed roller 120, the reinforcing member bending roller 124, and the motor 128 are provided so as to be movable in the radial direction of the helical tube 202 while maintaining their positional relationship. Therefore, it is possible to change the pressing force of the reinforcing member feed roller 120 and the reinforcing member bending roller 124 against the helical tube 202 (reinforcing member 16).

[0086] Furthermore, the reinforcing member bending roller 124 is provided so as to be movable in the radial direction of the helical tube 202 independently of the reinforcing member feed roller 120. The bending amount (curvature) of the reinforcing member 16 can be adjusted by adjusting the relative position of the reinforcing member bending roller 124 with respect to the reinforcing member feed roller 120. In this embodiment, the support frame 132 includes a first frame 132a that supports the reinforcing member feed roller 120 and other components, and a second frame 132b (an example of a frame) that supports the reinforcing member bending roller 124, the motor 128, and other components. The second frame 132b is provided so as to be able to swing relative to the first frame 132a, with a swing shaft 132c that is arranged parallel to the axis of the reinforcing member bending roller 124 as a fulcrum. The swing shaft 132c is provided at a circumferential position corresponding to the second reaction force receiving roller 126, which serves as a bending fulcrum for the reinforcing member 16. The reinforcing member bending roller 124 can be moved in the radial direction of the helical tube 202 by swinging the second frame 132b. This allows for easy adjustment of the radial position of the reinforcing member bending roller. Also, since the amount of bending (curvature) of the reinforcing member 16 can be adjusted, the mounting device 72 can be used for other pipe making machines 60 that form helical pipes 202 with different diameters.

[0087] In such an attachment device 72, the reinforcing member feed roller 120 is driven to rotate by receiving a driving force from the motor 128, and presses the reinforcing member 16 from the outer surface side to engage the tip end of the extension portion 56 of the reinforcing member 16 with the claw portion 34a of the lining member 12, while also applying a rotational force to the helical tube 202. In addition, by rotating while pressing the helical tube 202 from the outer surface side, the reinforcing member feed roller 120 additionally applies a propulsive force (a pulling force into the spiral winding guide device 62) to the lining member 12, the connecting member 14, and the reinforcing member 16.

[0088] The first reaction force receiving roller 122 rotates following the rotation of the helical tube 202, and presses the inner surface of the helical tube 202 so as to sandwich the connecting portion of the lining member 12 between itself and the reinforcing member feed roller 120. In addition to receiving the reaction force from the reinforcing member feed roller 120, the first reaction force receiving roller 122 also functions as a shape correcting roller that adjusts the shape of the helical tube 202 into a cylindrical shape by rotating while pressing the inner surface of the helical tube 202.

[0089] The reinforcing member bending roller 124 is driven to rotate by receiving a driving force from a motor 128, and presses the reinforcing member 16 from the outer surface side, thereby bending the reinforcing member 16 to fit the outer surface of the lining member 12. In addition, the reinforcing member bending roller 124 rotates while pressing the helical tube 202 from the outer surface side, thereby applying a rotational force to the helical tube 202 and also applying an auxiliary propulsive force to the lining member 12, the connecting member 14, and the reinforcing member 16.

[0090] The second reaction force receiving roller 126 rotates in response to the rotation of the helical tube 202, and presses the inner surface of the helical tube 202, including the connecting portion of the lining member 12, at a circumferential position between the reinforcing member feed roller 120 and the reinforcing member bending roller 124. In addition to receiving the reaction force from the reinforcing member bending roller 124, the second reaction force receiving roller 126 also functions as a shape correcting roller that adjusts the shape of the helical tube 202 into a cylindrical shape by rotating while pressing the inner surface of the helical tube 202.

[0091] Here, in the mounting device 72, while the radial position of the reinforcing member 16 is fixed by a pair of mounting rollers (the reinforcing member feed roller 120 and the first reaction force receiving roller 122), the reinforcing member 16 is pressed from the outside by the reinforcing member bending roller 124, which is provided at a predetermined circumferential distance from the reinforcing member feed roller 120, with the second reaction force receiving roller 126 as a bending fulcrum, thereby curving the reinforcing member 16. In other words, the reinforcing member 16 is bent by pressing at four points: the reinforcing member feed roller 120, the first reaction force receiving roller 122, the reinforcing member bending roller 124, and the second reaction force receiving roller 126. Therefore, the reinforcing member 16 can be properly mounted to the lining member 12 so as to fit along the outer surface of the lining member 12 without causing reverse bending deformation in the reinforcing member 16.

[0092] 11 to 14, the leg 74 is made of metal such as stainless steel, and includes a connecting frame 140 fixed to both sides of the frame member 82, and four support columns 142 provided so as to penetrate the connecting frame 140 in the vertical direction. Male threads are formed on the outer circumferential surface of the support columns 142 to thread into female threads provided on the connecting frame 140, and this screw mechanism makes it possible to adjust the installation height of the spiral winding guide device 62.

[0093] 11, two tension rods 144 extending in the vertical direction are provided on the inner surface of the spiral winding guide device 62. These tension rods 144 prevent the spiral winding guide device 62 (and therefore the spiral tube 202) from flattening. The direction (arrangement angle) of the tension rods 144 can be changed depending on the arrangement position (angle) of the mounting device 72, etc.

[0094] 1 and 31, an example of a pipeline rehabilitation method for rehabilitating an existing pipe 200 with a spiral pipe 202 formed using the above-described pipe making machine 60 will be described. In this example, the existing pipe 200 between the starting manhole 210 and the arrival manhole 212 is to be rehabilitated.

[0095] As shown in Figures 1 and 31, when rehabilitating an existing pipe 200, first, a pipe manufacturing machine 60 is installed inside the starting manhole 210. At this time, the lower part of the spiral winding guide device 62 is fitted into the inverted portion of the starting manhole 210, and the pipe manufacturing machine 60 is supported and fixed by the legs 74. Next, a pipe rehabilitation member 10 including a lining member 12, connecting member 14, and reinforcing member 16 is installed on the ground near the starting manhole 210. It is advisable to prepare and install the lining member 12, connecting member 14, and reinforcing member 16 individually wound into rolls. The inside of the existing pipe 200 is cleaned in advance using a high-pressure washer or the like.

[0096] Next, the lining member 12, connecting member 14 and reinforcing member 16 are supplied from the ground to a pipe making machine 60 installed inside the starting manhole 210, and the spiral pipe 202 formed using this pipe making machine 60 is sequentially fed from inside the starting manhole 210 into the existing pipe 200.

[0097] In the pipe making machine 60, the lining member 12 is wound spirally so that the side edges of the base 20 of the lining member 12 butt against each other, and a connecting member 14 is attached to the outer surface of the lining member 12, thereby connecting adjacent side edges of the lining member 12. Furthermore, a reinforcing member 16 is attached to the outer surface of the lining member 12 so that the reinforcing member 16 straddles and covers the connecting portion of the lining member 12, including the connecting member 14, thereby forming a helical pipe 202. The outer diameter of the helical pipe 202 (the outer diameter of the top wall 52 of the reinforcing member 16) is set to be slightly smaller than the inner diameter of the existing pipe 200. The helical pipe 202 produced in the pipe making machine 60 is extruded from the pipe making machine 60, starting with the produced portion, and fed into the existing pipe 200 toward the destination manhole 212 while rotating.

[0098] Here, by using the connecting members 14 to connect the lining members 12, after the lining members 12 have been rotated and positioned, the side edge portions of the lining members 12 can be connected and fixed together by the connecting members 14. Therefore, when forming the helical pipe 202, it is easy to match the circumferential lengths (diameters) of adjacent lining members 12, and it is possible to form a helical pipe 202 with a uniform diameter over the entire axial length.

[0099] Furthermore, by attaching the reinforcing member 16 so as to straddle and cover the connecting portions of the lining members 12, the resistance force in the tensile direction (the direction in which the lining members 12 move apart) at the connecting portions of the lining members 12 increases. Therefore, even if a tensile force acts on the helical pipe 202 during an earthquake or the like, the reinforcing member 16 can suppress deformation of the connecting portions of the lining members 12 (particularly the first fitting portion 22 and the second fitting portion 42), thereby ensuring watertightness by the watertight member 28. Note that axial displacement of the helical pipe 202 can be absorbed by the displacement absorbing portion 30, and therefore, having the lining member 12 with the displacement absorbing portion 30 more reliably suppresses deformation of the connecting portions of the lining members 12.

[0100] Furthermore, by attaching the reinforcing member 16, the strength (rigidity) of the connecting portion of the lining member 12 can be increased, and thus the strength of the helical tube 202 can be increased. Therefore, flattening of the helical tube 202, i.e., bending of the helical tube 202 inward and outward in the radial direction, can be prevented or reduced. In addition, because the reinforcing member 16 ensures the connecting strength of the lining member 12, there is no need to increase the thickness of the first fitting portion 22 (first ridges 24 and second ridges 26) or the second fitting portion 42 to increase the connecting strength, and the thickness can be made uniform with other portions. In other words, the lining member 12 and the connecting member 14 can be made uniform in thickness throughout, making it easier to mold the lining member 12 and the connecting member 14.

[0101] Furthermore, since the reinforcing member 16 protects the connecting portions of the lining member 12, it is possible to prevent the connecting portions of the lining member 12 (particularly the connecting member 14) from rubbing against the inner surface of the existing pipe 200 and being damaged when the formed helical pipe 202 is fed into the existing pipe 200. In particular, in this embodiment, when the reinforcing member 16 is attached to the helically wound lining member 12 to form the helical pipe 202, the top wall 52 of the reinforcing base 50 is located at the outermost radial position of the helical pipe 202. In other words, the outer surface of the top wall 52 of the reinforcing base 50 is located radially outward of the outer surfaces of the connecting portions 30b of the displacement absorbing portions 30 of the lining member 12 and the tips of the protrusions 34. Therefore, when the spiral pipe 202 is fed into the existing pipe 200, the top wall 52 of the reinforcing base 50 comes into sliding contact with the inner surface of the existing pipe 200, and the lining member 12 does not or hardly comes into sliding contact with the inner surface of the existing pipe 200, so that the entire lining member 12 can be properly protected.

[0102] In particular, since the mounting device 72 is provided with the reinforcing member bending roller 124 and the second reaction force receiving roller 126, the reinforcing member 16 can be appropriately curved at a predetermined curvature so as to fit the outer surface of the lining member 12. Therefore, the reinforcing member 16 can be appropriately mounted on the lining member 12.

[0103] Once the spiral pipe 202 has been installed over the entire length of the rehabilitation section of the existing pipe 200, the rehabilitation work for the existing pipe 200 is completed by carrying out cleanup work and the like as appropriate.

[0104] As described above, according to this embodiment, the attachment device 72 is equipped with the reinforcing member bending roller 124 and the second reaction force receiving roller 126, so that the reinforcing member 16 can be properly bent to a predetermined curvature within the pipe making machine 60. Therefore, the reinforcing member 16 can be properly attached to the connecting portion of the lining member 12, and a high-strength spiral pipe 202 can be properly formed.

[0105] As described above, the specific configuration and shape of the pipe rehabilitation member 10 (lining member 12, connecting member 14, and reinforcing member 16) can be changed as appropriate. The pipe rehabilitation member 10 may be configured so that the reinforcing member 16 can be attached from the outer surface side of the lining member 12.

[0106] For example, as shown in Figure 32, the configuration of the fitting portion between the lining member 12, the connecting member 14, and the reinforcing member 16 can be changed. Briefly, in this embodiment, the first fitting portion 22 of the lining member 12 is a protrusion extending in the longitudinal direction of the base 20, and a locking piece 22a protruding toward the inside in the width direction of the base 20 is formed at the tip of one side of this first fitting portion 22. In addition, a protrusion 34, which is a fitting portion with the reinforcing member 16, is formed on each of both sides of the other main surface 20b of the base 20. A claw portion 34a protruding toward the inside in the width direction of the base 20 is formed at the tip of the other side of this protrusion 34. Meanwhile, the second fitting portion 42 of the connecting member 14 is formed in a groove shape including a first protrusion 42b and a second protrusion 42c extending in the longitudinal direction of the base 40. Furthermore, the extending portion 56 of the reinforcing member 16 extends from the tip of the side wall 54 toward the outside in the width direction of the reinforcing base 50, and bends from the tip of the side wall 54 to extend obliquely toward the top wall 52 (radially outward). The first fitting portion 22 is sandwiched between the two protrusions 42b, 42c of the second fitting portion 42, and the locking piece 22a of the first fitting portion 22 and the locking piece 42d of the protrusion 42b are engaged with each other, thereby connecting the side edge portions of the lining member 12 to each other by the connecting member 14. The tip of the extending portion 56 of the reinforcing member 16 is locked by the claw portion 34a of the lining member 12, and the reinforcing member 16 is attached to the lining member 12 so as to straddle and cover the connecting portion of the lining member 12, including the connecting member 14.

[0107] 33, the pipe rehabilitating member 10 may have a configuration in which a reinforcing member 16 is attached to a connecting member 14. In other words, the attachment device 72 may be configured to attach the reinforcing member 16 to the connecting member 14. Furthermore, although not shown, the reinforcing member 16 does not necessarily have to be attached to the connecting portion of the lining member 12, but may be attached to the center of the lining member 12 in the width direction. In other words, the attachment device 72 may be configured to attach the reinforcing member 16 to the center of the lining member 12 in the width direction.

[0108] Furthermore, in the above-described embodiment, the side edges of the lining member 12 are connected to each other using the connecting member 14, but the side edges of the lining member 12 do not necessarily have to be connected to each other using the connecting member 14. It is also possible to form mating portions that can fit into each other on both side edges of the lining member 12, so that the side edges of the lining member 12 are directly connected to each other. In other words, the connecting portion of the lining member 12 may or may not include the connecting member 14.

[0109] Furthermore, it is possible to appropriately change the specific configuration and arrangement of each part of the pipe making machine 60. For example, the reinforcing member bending roller 124 does not necessarily have to be provided so as to be movable in the radial direction of the helical pipe 202.

[0110] The specific values ​​of the dimensions and the specific shapes of the components given above are merely examples and can be changed as needed depending on the product specifications and other requirements. [Explanation of symbols]

[0111] 10...Pipe rehabilitation material 12...Lining material 14...Connecting member 16...Reinforcing member 60…Pipe making machine 62...Spiral winding guide device 64...Lining material feed device 66 ...Connecting member guide device 68...Reinforcing member feed bending device 70...coupling device 72...Mounting device 120 ... Reinforcement member feed roller 122...First reaction force receiving roller 124 ... Reinforcement member bending roller 126...Second reaction force receiving roller 128...Motor 132b...2nd frame (frame) 200...Existing pipe 202 …Spiral tube 210,212 ... manholes

Claims

1. A pipe making machine that forms a helical pipe by spirally winding a lining member and connecting adjacent side edge portions of the lining member, and then sequentially feeds the formed helical pipe into an existing pipe, a spiral winding guide device that guides the lining member so as to wind it spirally; a connecting device for connecting adjacent side edges of the spirally wound lining member; and an attachment device for attaching a reinforcing member in a spiral shape from the outer surface side of the spirally wound lining member; The mounting device comprises: a reinforcing member feed roller that presses the reinforcing member from the outer surface side to attach the reinforcing member to the outer surface side of the lining member and applies a rotational force to the helical tube; a motor that rotates the reinforcing member feed roller; a first reaction force receiving roller provided at a circumferential position opposite to the reinforcing member feed roller and pressing an inner surface side of the lining member so as to sandwich the lining member between the reinforcing member feed roller and the first reaction force receiving roller; a reinforcing member bending roller that is provided at a circumferential position downstream of the reinforcing member feed roller in the rotation direction of the helical tube at a predetermined distance from the reinforcing member feed roller, and that presses the reinforcing member from an outer surface side to curve the reinforcing member so as to fit the outer surface of the lining member; and A pipe making machine comprising a second reaction force receiving roller provided at a circumferential position between the reinforcing member feed roller and the reinforcing member bending roller, and pressing the inner surface side of the lining member.

2. the reinforcing member bending roller is provided so as to be movable in a radial direction of the helical tube, 2. The pipe manufacturing machine according to claim 1, wherein the amount of bending of the reinforcing member is adjustable.

3. 3. A pipe manufacturing machine according to claim 2, wherein the reinforcing member bending roller is supported by a frame that is provided so as to be swingable about a swing shaft that is disposed parallel to the axis of the reinforcing member bending roller as a fulcrum.

4. 3. The pipe manufacturing machine according to claim 1, wherein the motor also serves as a motor for rotating the reinforcing member bending roller.

5. 3. The pipe manufacturing machine according to claim 1, wherein the mounting device mounts the reinforcing member to the lining member.

6. 3. The pipe manufacturing machine according to claim 1, wherein the attachment device attaches the reinforcing member to the lining member so as to straddle and cover the connecting portion of the lining member.

7. the connecting device attaches a connecting member to the lining member from the outer surface side, thereby connecting adjacent side edge portions of the lining member with the connecting member; The pipe manufacturing machine according to claim 6 , wherein the attachment device attaches the reinforcing member to the lining member so as to cover the connecting member.

8. the connecting device attaches a connecting member to the lining member from the outer surface side, thereby connecting adjacent side edge portions of the lining member with the connecting member; The pipe manufacturing machine according to claim 1 or 2, wherein the mounting device mounts the reinforcing member to the connecting member.

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