Pipe making machine

Abstract

To provide a pipe making machine capable of obtaining a renovated pipe with high strength in a renovated pipe in which a lining member is spirally wound and side edges of adjacent lining members are connected with a connecting member.SOLUTION: The pipe making machine main body 100 includes a spiral winding unit 1, a connecting unit 3 for connecting adjacent side edges of a lining member 91 with a connecting member 92, and a reinforcing unit 200 for attaching reinforcing member 93 to connecting member 92 before connecting adjacent side edges of lining member 91 by connecting member 92.SELECTED DRAWING: Figure 8

Description

Technical Field

[0001] The present invention relates to a pipe manufacturing machine.

Background Art

[0002] Patent Document 1 discloses an example of a conventional pipe manufacturing machine. The pipe manufacturing apparatus described in Patent Document 1 is an apparatus for manufacturing a tubular body from a strip-shaped member in an existing pipeline (for example, a sewer pipe channel, etc.). The strip-shaped member has a joint portion. The pipe manufacturing apparatus manufactures a tubular body by spirally winding the strip-shaped member and connecting adjacent strip-shaped members with the joint portion.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in the pipe manufacturing apparatus described in Patent Document 1, when the strip-shaped member is spirally wound, it is configured to be connected to an adjacent strip-shaped member by a joint portion. However, if the rigidity of the joint portion is low, the joint portion may be deformed by, for example, an external force from the inside to the outside of the tubular body, an external force from the outside to the inside of the tubular body, a stress generated in the tubular body, etc.

[0005] In view of the above circumstances, the present invention provides a pipe manufacturing machine that can manufacture a rehabilitation pipe with high strength, in which a lining member is spirally wound and side edge portions of adjacent lining members are connected by a connecting member.

Means for Solving the Problems

[0006] One aspect of the pipe manufacturing machine according to the present invention includes a spiral winding device that spirally winds a strip-shaped lining member around a first axis, a connecting device that connects adjacent side edges of the lining member with a connecting member, and a reinforcing device that attaches a reinforcing member to the connecting member before connecting the adjacent side edges of the lining member with the connecting member.

Advantages of the Invention

[0007] The pipe manufacturing machine according to the above aspect of the present invention has an advantage that it can manufacture a rehabilitation pipe with high strength in a rehabilitation pipe that spirally winds a lining member and connects adjacent side edges of the lining member with a connecting member.

Brief Description of the Drawings

[0008]

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Mode for Carrying Out the Invention

[0009] Hereinafter, the pipe manufacturing machine 1000 according to the present embodiment will be described in detail. In this specification, as shown in FIG. 1, the direction parallel to the central axis of the existing pipe K1 in the ground is defined as the "front-rear direction", and in particular, the direction in which the regenerated pipe 9 manufactured by the pipe manufacturing machine 1000 is sent out is defined as the "front direction". In the present embodiment, the front-rear direction will be described as being parallel to the horizontal plane, but it does not necessarily have to be parallel to the horizontal plane.

[0010] The "central axis of the existing pipe K1" as used in this specification means the centroid of the flow path in the cross section orthogonal to the longitudinal direction of the existing pipe K1. Also, in this specification, "parallel" includes not only the case where two straight lines, sides, surfaces, etc. do not intersect even when extended, but also the case where the angle formed by two straight lines, sides, surfaces, etc. intersects within a range of 10° or less.

[0011] Also, in this specification, the direction orthogonal to the front-rear direction may be referred to as the "radial direction of the regenerated pipe 9" or the "radial direction". The "orthogonal" as used in this specification includes both the case where two straight lines, sides, surfaces, etc. intersect and the case where they intersect when extended. "Orthogonal" does not only mean that the angle formed by two straight lines, sides, surfaces, etc. is exactly 90°, but also includes the case where they are substantially orthogonal. "Substantially orthogonal" includes the case where the angle formed by two straight lines, sides, surfaces, etc. intersects within a range of, for example, ±10° or less.

[0012] Also, the direction toward the outside in the radial direction of the regenerated pipe 9 is referred to as the "outer direction". The direction toward the inside in the radial direction of the regenerated pipe 9 is referred to as the "inner direction".

[0013] <Embodiment> The pipe manufacturing machine 1000 according to the present embodiment is a device for manufacturing the regenerated pipe 9 for regenerating the existing pipe K1. While manufacturing the regenerated pipe 9, the pipe manufacturing machine 1000 feeds the manufactured regenerated pipe 9 forward. That is, the pipe manufacturing machine 1000 according to the present embodiment is a push-type pipe manufacturing machine.

[0014] As shown in Fig. 2, the pipe manufacturing machine 1000 spirally winds the strip-shaped lining member 91 around an axis parallel to the front-rear direction (hereinafter referred to as "the first axis X1"), and connects adjacent side edges of the spirally wound lining member 91 with the connecting member 92. While forming the rehabilitated pipe 9 in this way, the pipe manufacturing machine main body 100 feeds the rehabilitated pipe 9 into the existing pipe K1 by rotating the rehabilitated pipe 9 around the first axis X1.

[0015] As shown in Fig. 1, the pipe manufacturing machine main body 100 according to the present embodiment includes a pipe manufacturing machine main body 100 installed in the manhole M1 and a reinforcing device 200. The pipe manufacturing machine main body 100 forms the rehabilitated pipe 9. Before pipe manufacturing by the pipe manufacturing machine main body 100, the reinforcing device 200 attaches a reinforcing member 93 to the connecting member 92 to form a connected body 920. In this specification, the "connected body 920" means the one to which the reinforcing member 93 is attached to the connecting member 92.

[0016] The existing pipe K1 is an underground pipe to be rehabilitated. The existing pipe K1 is buried underground. Examples of the existing pipe K1 include sewer pipes, water supply pipes, wiring pipes, gas pipes, agricultural water pipes, etc. Examples of the cross-sectional shape of the existing pipe K1 include circular, rectangular, horseshoe-shaped, etc. Here, as an example, the existing pipe K1 with a circular cross-section will be illustrated and described.

[0017] Examples of the material of the existing pipe K1 include those made of reinforced concrete, synthetic resin, metal, etc. Examples of the inner diameter of the existing pipe K1 are, for example, 300 mm or more and 2000 mm or less, and more specifically, 600 mm or more and 1500 mm or less. When the existing pipe K1 has an inner diameter of 300 mm or more and 1000 mm or less, it is difficult for an operator to enter and work inside, so pipe rehabilitation using the pipe manufacturing machine main body 100 is suitable. However, as the pipe manufacturing machine main body 100, pipe rehabilitation can also be performed on the existing pipe K1 with an inner diameter exceeding 2000 mm.

[0018] (Pipe rehabilitation member) The pipe rehabilitation member is a member for forming the rehabilitation pipe 9. As described above, the pipe rehabilitation member includes a lining member 91, a connecting member 92, and a reinforcing member 93. The lining member 91, the connecting member 92, and the reinforcing member 93 are each wound around a drum before manufacturing, as shown in FIG. 1. The installation position of the drum during manufacturing is not particularly limited. For example, it may be installed on the loading platform of a truck or on the ground.

[0019] (Lining member 91) The lining member 91 is a belt-shaped member that constitutes the main body of the rehabilitation pipe 9. The lining member 91 is formed in a long shape. The lining member 91 has flexibility that allows it to bend along the longitudinal direction. As shown in FIG. 3(A), the lining member 91 includes a lining base 911, a pair of first fitting portions 912, and a displacement absorbing portion 913. In the lining member 91, the surface that constitutes the inner surface of the rehabilitation pipe 9 may be referred to as the "inner peripheral surface of the lining member 91". The surface opposite to the inner peripheral surface of the lining member 91 may be referred to as the "outer peripheral surface of the lining member 91". The "outer peripheral surface of the lining member 91" is the surface of the lining member 91 that faces outward, and specifically, it is composed of a part of the outer main surface of the lining base 911, a part of the first fitting portion 912, and a part of the displacement absorbing portion 913.

[0020] The lining base 911 constitutes the main body of the lining member 91. The lining base 911 is formed in a plate shape. One main surface of the lining base 911 may be referred to as the "first inner surface 9111". The first inner surface 9111 is a smooth surface and constitutes the inner surface of the rehabilitation pipe 9 (in other words, the "first inner surface 9111" is the "inner peripheral surface of the lining member 91"). Also, the surface opposite to the first inner surface 9111 of the lining base 911 may be referred to as the "first outer surface 9112".

[0021] The width of the lining base 911 (dimension in the direction orthogonal to the longitudinal direction) is, for example, 50 mm or more and 100 mm or less, more specifically, 70 mm or more and 80 mm or less, and 75 mm is cited as an example. The thickness of the lining base 911 is, for example, 2 mm or more and 5 mm or less, more specifically, 2 mm or more and 3 mm or less, and 2.5 mm is cited as an example.

[0022] The first fitting portion 912 is a portion for coupling the connecting member 92 to the lining member 91. The first fitting portion 912 is formed integrally with the lining base 911. The first fitting portion 912 is formed at both ends in the width direction of the first outer surface 9112 of the lining base 911. Each first fitting portion 912 includes, in this embodiment, a first engaging portion 9121 and a third engaging portion 9122.

[0023] The first engaging portion 9121 protrudes outward from the end in the width direction of the first outer surface 9112 of the lining base 911. The first engaging portion 9121 engages with the second engaging portion 9221 of the connecting member 92 described later. A locking claw 9121a that protrudes toward the center in the width direction of the lining member 91 is formed at the tip of the first engaging portion 9121. The first engaging portion 9121 is formed over the entire length in the longitudinal direction of the lining base 911.

[0024] The third engaging portion 9122 is located closer to the center in the width direction than the first engaging portion 9121 on the first outer surface 9112 of the lining base 911. The third engaging portion 9122 protrudes outward in the same manner as the first engaging portion 9121. The third engaging portion 9122 engages with the fourth engaging portion 9222 of the connecting member 92 described later. A locking claw 9122a that protrudes toward the center in the width direction of the lining member 91 is formed at the tip of the third engaging portion 9122. The third engaging portion 9122 is formed over the entire length in the longitudinal direction of the lining base 911.

[0025] The displacement absorbing portion 913 deforms when the regeneration pipe 9 receives a force in the direction of the first axis X1, and relaxes the stress generated in the regeneration pipe 9. Examples of the "force" mentioned here include, for example, an external force applied to the regeneration pipe 9 in the direction of the first axis X1, an external force applied to the regeneration pipe 9 from the inside to the outside, an external force applied to the regeneration pipe 9 from the outside to the inside, the stress (shearing stress, compressive stress) generated in the regeneration pipe 9, and the like. The displacement absorbing portion 913 is formed between the pair of first fitting portions 912 in the width direction of the lining member 91. The displacement absorbing portion 913 protrudes outward from the first outer surface 9112 of the lining base 911.

[0026] A slit-shaped gap along the longitudinal direction is formed between the pair of first fitting portions 912 in the lining base 911, and it is divided in the width direction. The displacement absorbing portion 913 connects the opposing end portions of the lining base 911 via the gap. The displacement absorbing portion 913 includes a pair of side wall portions 9131 provided at the end portions of each of the divided portions of the lining base 911, and a connecting portion 9132 that connects the tip portions of the pair of side wall portions 9131. Each side wall portion 9131 faces each other, and the distance between the opposing sides increases as it progresses outward. The displacement absorbing portion 913 is formed over the entire longitudinal length of the lining base 911. In the present embodiment, the protruding height of the displacement absorbing portion 913 from the first outer surface 9112 is higher than that of the first engaging portion 9121 and the third engaging portion 9122. Note that the displacement absorbing portion 913 according to the present embodiment is formed in a substantially triangular cross-sectional shape, but may be formed in a substantially U-shaped cross-section or a substantially C-shaped cross-section.

[0027] Examples of the material of the lining member 91 include synthetic resins such as polyethylene resin, polypropylene resin, nylon resin, fluororesin, and rigid vinyl chloride resin. The lining member 91 is integrally formed, for example, by extrusion molding. The lining member 91 according to the present embodiment is formed of high-density polyethylene resin.

[0028] (Connecting member 92) The connecting member 92 connects the adjacent side edges of the lining member 91 wound spirally around the first axis X1. The connecting member 92 is attached to the lining member 91 along the outer peripheral surface of the lining member 91. The connecting member 92 is formed in a long shape. The connecting member 92 has flexibility that allows it to bend along the longitudinal direction. As shown in FIG. 4, the connecting member 92 includes a connecting base 921, a pair of second fitting portions 922, a pair of hanging receiving portions 923, and a pushing portion 924. In the connecting member 92, the surface facing the lining member 91 may be referred to as the "inner peripheral surface of the connecting member 92". The surface on the opposite side of the inner peripheral surface of the connecting member 92 may be referred to as the "outer peripheral surface of the connecting member 92". The "inner peripheral surface of the connecting member 92" means the surface facing inward in the connecting member 92. The "outer peripheral surface of the connecting member 92" means the surface facing outward in the connecting member 92.

[0029] The connecting base 921 constitutes the main body of the connecting member 92. The connecting base 921 is formed in a plate shape. The inner main surface among the main surfaces of the connecting base 921 may be referred to as the "second inner surface 9211". Also, the surface on the opposite side of the second inner surface 9211 of the connecting base 921 may be referred to as the "second outer surface 9212". The width of the connecting base 921 (dimension in the direction orthogonal to the longitudinal direction) is, for example, 30 mm or more and 50 mm or less, more specifically, 30 mm or more and 40 mm or less, and an example is 37 mm. The thickness of the connecting base 921 is, for example, 2 mm or more and 5 mm or less, more specifically, 2 mm or more and 4 mm or less, and an example is 3 mm.

[0030] The second fitting portion 922 is a portion that couples to the first fitting portion 912 of the lining member 91. The second fitting portion 922 is formed integrally with the connecting base 921. The second fitting portions 922 are formed at both ends in the width direction of the second inner surface 9211 of the connecting base 921. In this embodiment, each second fitting portion 922 includes a second engaging portion 9221 and a fourth engaging portion 9222.

[0031] The second engaging portion 9221 engages with the first engaging portion 9121 of the lining member 91. The second engaging portion 9221 is located on the central side in the width direction rather than the fourth engaging portion 9222 on the second inner surface 9211 of the connecting base 921. The second engaging portion 9221 protrudes inward. At the tip of the second engaging portion 9221, a locking claw 9221a protruding toward the central side in the width direction of the connecting member 92 is formed. The second engaging portion 9221 is formed over the entire longitudinal length of the connecting base 921.

[0032] The fourth engaging portion 9222 engages with the third engaging portion 9122 of the lining member 91. The fourth engaging portion 9222 protrudes inward from both ends in the width direction of the second inner surface 9211 of the connecting base 921. At the tip of the fourth engaging portion 9222, a locking claw 9222a protruding toward the central side in the width direction of the connecting member 92 is formed. The fourth engaging portion 9222 is formed over the entire longitudinal length of the connecting base 921.

[0033] Also, a waterstop material 925 is provided on the second inner surface 9211 of the connecting base 921. The waterstop material 925 is provided between the second engaging portion 9221 and the fourth engaging portion 9222 on the second inner surface 9211. Examples of the waterstop material 925 include silicone rubber, nitrile rubber, chloroprene rubber, tetrafluoroethylene resin, etc. When the first fitting portion 912 of the lining member 91 and the second fitting portion 922 of the connecting member 92 are joined, the waterstop material 925 is compressed between the connecting base 921 and the tip of the third engaging portion 9122 of the lining member 91. Thereby, the watertightness at the connecting portion of the side edge portion of the lining member 91 is ensured.

[0034] As shown in FIG. 6, the engaging receiving portion 923 is a portion that engages with the reinforcing member 93. According to the engaging receiving portion 923, the connecting member 92 is prevented from moving inward with respect to the reinforcing member 93. As shown in FIG. 4(A), the engaging receiving portion 923 protrudes outward from both ends in the width direction of the second outer surface 9212 of the connecting base 921. A locking protrusion 9231 that protrudes outward in the width direction of the connecting member 92 is formed at the tip of the engaging receiving portion 923. The engaging receiving portion 923 is formed over the entire length of the connecting base 921 in the longitudinal direction.

[0035] The pushing portion 924 is a portion for transmitting the force by which the reinforcing member 93 is pushed when the connecting body 920 is fitted into the lining member 91 to the central portion in the width direction of the connecting base 921. The pushing portion 924 stands up from the center in the width direction of the connecting base 921. The surface of the pushing portion 924 facing outward is located on the same plane as the surface of the engaging receiving portion 923 facing outward. In the present embodiment, the pushing portion 924 is formed in a substantially T-shaped cross section, but is not limited thereto, and may be, for example, an inverted L-shaped, I-shaped, inverted U-shaped, or the like.

[0036] Examples of the material of the connecting member 92 include rigid vinyl chloride resin, nylon resin, fluororesin, polyethylene resin, polypropylene resin, and the like. The connecting member 92 is integrally formed, for example, by extrusion molding. The connecting member 92 according to the present embodiment is formed of rigid vinyl chloride resin.

[0037] (Reinforcing member 93) As shown in Fig. 6, the reinforcing member 93 reinforces the connecting member 92. The reinforcing member 93 is attached so as to cover the connecting member 92. According to the reinforcing member 93, the bending of the connecting member 92 in the outer direction and the inner direction is reduced. Further, according to the reinforcing member 93, when a force is applied to the rehabilitation pipe 9 in the direction of the first axis X1, it is possible to reduce the deformation of the connecting member 92 and the opening between adjacent lining members 91. As shown in Fig. 5, the reinforcing member 93 includes a top surface portion 931, a pair of rib portions 932, and a pair of engaging portions 933. The top surface portion 931, the rib portions 932, and the engaging portions 933 are integrally formed. Similar to the connecting member 92, the reinforcing member 93 is preferably wound in a spiral shape around the first axis X1 and has a length equivalent to the entire length of the connecting member 92. However, a plurality of reinforcing members 93 may be sequentially joined and do not necessarily have to be continuous.

[0038] The top surface portion 931 is a portion facing the outer peripheral surface of the connecting member 92. The top surface portion 931 connects the pair of rib portions 932 to each other. The width of the top surface portion 931 is longer than the width of the connecting member 92. As shown in Fig. 7, the width of the top surface portion 931 is shorter than the dimension between the displacement absorbing portions 913 of the adjacent lining members 91. The top surface portion 931 can reduce the bending of the connecting member 92 in the outer direction.

[0039] The rib portion 932 protrudes inward from the end portion in the width direction of the top surface portion 931. The rib portion 932 faces both side surfaces in the width direction of the connecting member 92 with respect to the connecting member 92. By positioning the pair of rib portions 932 on both sides in the width direction of the connecting member 92, it is possible to suppress the opening between the adjacent lining members 91.

[0040] The engaging portion 933 is provided at the inner end of each rib portion 932 (that is, the tip portion on the side opposite to the top surface portion 931 of the rib portion 932). The engaging portion 933 extends from the tip portion of the rib portion 932 toward the outer side (the outer side in the radial direction) than the tip portion. The engaging portion 933 according to the present embodiment includes a base portion 9331 extending parallel to the top surface portion 931 from the tip of the rib portion 932, and an inclined portion 9332. The inclined portion 9332 is inclined with respect to the base portion 9331 so as to go toward the center side in the width direction as it goes outward from the base portion 9331. At the tip of the inclined portion 9332, the engaging receiving portion 923 of the connecting member 92 abuts. By the engaging portion 933 abutting against the engaging receiving portion 923 of the connecting member 92, it is possible to reduce the inward deflection of the connecting member 92.

[0041] Examples of the material of the reinforcing member 93 include metal, synthetic resin, carbon, etc., but from the viewpoint of high rigidity and the like, it is preferably metal. Examples of the metal include stainless steel, steel, titanium, aluminum alloy, etc. The plate thickness of the reinforcing member 93 is, for example, 1 mm or more and 4 mm or less, more specifically, 1.2 mm or more and 3 mm or less, and 1.6 mm is cited as an example.

[0042] (Recycled pipe 9) The recycled pipe 9 is a pipe manufactured by the pipe manufacturing machine main body 100 using the above-described pipe recycling member. As shown in FIG. 2, the recycled pipe 9 is configured by connecting adjacent side edges of a lining member 91 wound in a spiral shape with a constant radius around the first axis X1 by a connecting body 920. When the lining member 91 is wound in a spiral shape around the first axis X1, as shown in FIG. 7, in a cross section in a plane including the first axis X1, the lining members 91 are adjacent to each other (actually, the adjacent lining members 91 are the same lining member 91).

[0043] At this time, the lining members 91 adjacent to each other are abutted against each other so that the inner peripheral surfaces (first inner surfaces 9111) are flush with each other. After that, the connecting body 920 is arranged so as to straddle the adjacent lining members 91, and the connecting body 920 is pushed into the lining member 91 so that the second fitting portion 922 of the connecting member 92 is coupled to the first fitting portion 912 of the lining member 91. This is sequentially performed along the longitudinal direction of the lining member 91 and the connecting body 920.

[0044] Since the reinforcing member 93 according to the present embodiment is made of metal, when the connecting body 920 is attached to the lining member 91, it is necessary to attach the connecting body 920 while bending it in a spiral shape. In the present embodiment, the connecting body 920 can be coupled to the lining member 91 by using the pipe manufacturing machine main body 100 described below.

[0045] (Pipe manufacturing machine 1000) The pipe manufacturing machine 1000 is a device that manufactures the regenerated pipe 9 by using the above-described pipe regeneration member. As shown in FIG. 8, the pipe manufacturing machine 1000 includes a pipe manufacturing machine main body 100 and a reinforcing device 200. In the pipe manufacturing machine 1000 according to the present embodiment, the pipe manufacturing machine main body 100 is installed in the manhole M1, and the reinforcing device 200 is installed on the ground. However, the reinforcing device 200 may also be installed in the manhole M1 together with the pipe manufacturing machine main body 100. In this case, the reinforcing device 200 may be attached to the pipe manufacturing machine main body 100.

[0046] Hereinafter, when explaining the pipe manufacturing machine 1000, the path along which the lining member 91 moves is referred to as the "moving path of the lining member 91". Similarly, the path along which the connecting member 92 moves is referred to as the "moving path of the connecting member 92", the path along which the reinforcing member 93 moves is referred to as the "moving path of the reinforcing member 93", and the path along which the connecting body 920 moves is referred to as the "moving path of the connecting body 920". These moving paths do not have to be partitioned from other spaces.

[0047] (Reinforcing device 200) The reinforcing device 200 is a device for attaching the reinforcing member 93 to the connecting member 92. The reinforcing device 200 is located upstream of the pipe manufacturing machine body 100 in the moving path of the connecting member 92. That is, the reinforcing device 200 attaches the reinforcing member 93 to the connecting member 92 and forms the connecting body 920 before the connecting member 92 connects the adjacent side edges of the lining member 91. As shown in FIG. 9, the reinforcing device 200 includes a pair of clamping rollers 210 and a support 220.

[0048] The clamping rollers 210 sandwich the connecting member 92 and the reinforcing member 93 in the thickness direction and fit the connecting member 92 into the reinforcing member 93. Each clamping roller 210 is rotatably attached to the support 220. The rotation axis of the clamping roller 210 is orthogonal to the moving path of the connecting member 92 and the moving path of the reinforcing member 93. The clamping roller 210 according to the present embodiment is a roller with a flange whose both sides in the rotation axis direction are raised in a flange shape. However, the clamping roller 210 may be formed with the same outer diameter over the entire length in the rotation axis direction. The rotation axes of the pair of clamping rollers 210 are arranged parallel to each other.

[0049] The support 220 rotatably supports the clamping roller 210. The support 220 includes a pair of support plates 221 and a pair of shafts 222 bridged over the pair of support plates. The support plate 221 constitutes the main body of the support 220. The lower end of the support plate 221 is fixed to the ground in the present embodiment. However, the support plate 221 may be fixed to the frame member 11 described later. The shaft 222 is a component that forms the rotation axis of the clamping roller 210. The shaft 222 is fixed to the support plate 221. A bearing is interposed between the shaft 222 and the clamping roller 210. Examples of the bearing include a ball bearing, a roller bearing, a needle bearing, and a slide bearing.

[0050] When the connecting member 92 and the reinforcing member 93 enter between the pair of clamping rollers 210, the connecting member 92 is fitted onto the reinforcing member 93. Then, the connecting member 92 and the reinforcing member 93 that have exited the reinforcing device 200 are sent to the pipe manufacturing machine main body 100 in a state where they are fitted together. The reinforcing device 200 can perform this continuously.

[0051] (Pipe manufacturing machine main body 100) The pipe manufacturing machine main body 100 is a device that manufactures the rehabilitation pipe 9 using the lining member 91 and the connecting body 920 (the connecting member 92 and the reinforcing member 93). As shown in FIG. 10, the pipe manufacturing machine main body 100 includes a spiral winding device 1, a connecting device 3, an overall rotation device 4, a lining member feeding device 5, and a connecting body guiding device 7.

[0052] In the following description, as shown in FIG. 10, when the pipe manufacturing machine main body 100 is viewed from the front to the back along the first axis X1, when the central angle at the 0 o'clock position (hereinafter referred to as the "0 o'clock position") is set to 0°, every 90° central angle, it is defined as the 3 o'clock position (hereinafter referred to as the "3 o'clock position"), the 6 o'clock position (hereinafter referred to as the "6 o'clock position"), and the 9 o'clock position (hereinafter referred to as the "9 o'clock position"). In this embodiment, the 0 o'clock position is the upper end, the 3 o'clock position is the right end, the 6 o'clock position is the lower end, and the 9 o'clock position is the left end, but this is merely an example. For example, the 0 o'clock position may be the left end, the 3 o'clock position may be the upper end, the 6 o'clock position may be the right end, and the 9 o'clock position may be the lower end.

[0053] The description of "… o'clock position" in this specification is intended to include ±15° of the position of the corresponding short hand. For example, the description of "3 o'clock position" includes the positions from the position corresponding to 2:30 to the position corresponding to 3:30 of the short hand of the clock.

[0054] As the pipe manufacturing machine main body 100, the overall rotation device 4 is arranged at the 0 o'clock position, and it is preferably arranged at the upper end. At this time, the connecting device 3 is arranged between the 3 o'clock position and the 0 o'clock position. In this embodiment, the connecting device 3 is arranged at the 2 o'clock position.

[0055] Further, the lining member feeder 5 is preferably disposed between the 0 o'clock position and the 9 o'clock position. In the present embodiment, the lining member feeder 5 is disposed at the 10 o'clock position. Also, the connector guide device 7 is disposed at the 10 o'clock position.

[0056] (Spiral winding device 1) The spiral winding device 1 is a device that spirally winds the lining member 91 around the first axis X1. As shown in FIG. 11, the spiral winding device includes a frame member 11 and a plurality of outer guide rollers 12.

[0057] The frame member 11 is a frame that holds a plurality of outer guide rollers 12. The frame member 11 is formed in a cylindrical shape. The frame member 11 has a cylindrical portion 111 having a central axis parallel to the first axis X1, a first annular plate portion 112 protruding outward from the front end of the cylindrical portion 111, and a second annular plate portion 113 protruding inward from the rear end of the cylindrical portion 111.

[0058] Examples of the material of the frame member 11 include stainless steel, steel, titanium, and aluminum alloy.

[0059] The outer guide roller 12 is rotatably attached to the cylindrical portion 111. The lining member 91 moves according to the rotation of the outer guide roller 12. Therefore, the outer guide roller 12 forms the movement path of the lining member 91 in the spiral winding device 1. According to the outer guide roller 12, the lining member 91 can be smoothly moved along the inner peripheral surface of the cylindrical portion 111 so as to draw a spiral around the first axis X1. The plurality of outer guide rollers 12 are arranged at regular intervals along the inner peripheral surface of the cylindrical portion 111.

[0060] Each outer guide roller 12 includes a bearing and a pair of rollers rotatably supported by the bearing. Examples of the bearing include a ball bearing, a roller bearing, a needle bearing, a slide bearing, and the like. The roller may be either spherical or cylindrical, but in this embodiment, it is cylindrical. The roller may be made of metal or resin, but in this embodiment, it is made of metal.

[0061] Here, FIG. 12 shows a developed view of the cylindrical portion 111 of the spiral winding device 1. In FIG. 12, the movement path R1 of the lining member 91 is indicated by an imaginary line. As shown in FIG. 12, the rotation axis of the outer guide roller 12 is along the inner surface of the cylindrical portion 111 and orthogonal to the movement path R1 of the lining member 91. Therefore, the rotation direction of the outer guide roller 12 is parallel to the movement path R1 of the lining member 91. Thereby, in the spiral winding device 1, the lining member 91 can be moved in a spiral shape.

[0062] The plurality of outer guide rollers 12 are preferably arranged such that the lining member 91 can rotate two or more turns (720 degrees or more) within the cylindrical portion 111. In this embodiment, the outer guide rollers 12 are arranged to correspond to the rotation of the lining member 91 by 2.75 turns (990 degrees).

[0063] The interval W1 between the outer guide rollers 12 adjacent in the first axis X1 direction is set to be substantially the same size as the width of the lining member 91. This makes it easier to abut the side edge portions of the lining member 91 wound in a spiral shape against each other. Further, the interval W2 in the rotation axis direction of the pair of rollers in the outer guide roller 12 is set to a length such that each of the pair of rollers enters between the first fitting portion 912 and the displacement absorbing portion 913 in the lining member 91 and contacts the first outer surface 9112.

[0064] When the outer guide roller 12 interferes with other devices such as the connecting device 3 or the overall rotating device 4, for example, at the interfering location, the outer guide roller 12 can be appropriately omitted, one of the pair of rollers can be omitted, or the distance between the pair of rollers can be changed.

[0065] The plurality of outer guide rollers 12 guide the lining member 91 so as to be wound spirally while abutting the side edges of adjacent lining members 91 against each other. At this time, since each of the pair of rollers of the outer guide roller 12 enters between the first fitting portion 912 and the displacement absorbing portion 913 of the lining member 91, the positioning of the lining member 91 in the first axis X1 direction of the rehabilitation pipe 9 can be performed.

[0066] Also, since the plurality of outer guide rollers 12 abut against the outer peripheral surface of the spirally wound lining member 91, the outer diameter of the rehabilitation pipe 9 is defined. Thereby, the rehabilitation pipe 9 can be formed with a constant outer diameter based on the outer diameter of the rehabilitation pipe 9. Further, for each of the plurality of outer guide rollers 12, the front side surface of the pair of rollers abuts against the first fitting portion 912 of the lining member 91 or the rear side surface of the connecting body 920. For this reason, the formed rehabilitation pipe 9 can be sent forward.

[0067] The connecting device 3, the overall rotating device 4, the lining member feeding device 5, and the connecting body guiding device 7 are attached to the frame member 11. As shown in FIG. 12, in the cylindrical portion 111 of the frame member 11, there are formed a first opening 114 for inserting the lining member 91 into the cylindrical portion 111, a second opening 115 for inserting the connecting body 920 into the cylindrical portion 111, a third opening 116 to which the connecting device 3 is attached, and a fourth opening 117 to which the overall rotating device 4 is attached.

[0068] The first opening 114 is an opening into which a part of the lining member feeder 5 described later is inserted. The lining member 91 is taken into the inside of the cylindrical portion 111 from the outside of the cylindrical portion 111 through the first opening 114. Specifically, the lining member 91 enters the lining member feeder 5 described later, is guided by the lining member feeder 5, and is introduced into the inside of the cylindrical portion 111. The first opening 114 is formed at the 10 o'clock position in the cylindrical portion 111. The first opening 114 is located on the most upstream side of the movement path of the lining member 91 in the cylindrical portion 111.

[0069] The second opening 115 is an opening for introducing the connecting body 920 guided by the connecting body guide device 7 into the inside of the cylindrical portion 111. Specifically, the connecting body 920 is guided by the connecting body guide device 7 described later and is introduced from the outside to the inside of the cylindrical portion 111. The second opening 115 is formed at the 2 o'clock position in the cylindrical portion 111.

[0070] The third opening 116 is an opening into which a part of the connecting device 3 is inserted. The third opening 116 is formed at the 1 o'clock position in the cylindrical portion 111.

[0071] The fourth opening 117 is an opening into which a part of the overall rotation device 4 is inserted. The fourth opening 117 is formed at the 0 o'clock position in the cylindrical portion 111. Also, the fourth opening 117 is formed on the downstream side of the fifth opening 118 in the movement path of the lining member 91 in the cylindrical portion 111.

[0072] (Lining member feeder 5) The lining member feeder 5 is a device that feeds the lining member 91 into the spiral winding device 1. The lining member feeder 5 has a movement path for the lining member 91, and the movement path is connected from the outside of the spiral winding device 1 to the movement path inside the spiral winding device 1. As shown in FIG. 13, the lining member feeder 5 includes a feeder main body 51 and a buckling prevention guide roller group 52.

[0073] The lining member feeding device 5 is fixed to the frame member 11 by a fastening member such as a bolt. When the lining member feeding device 5 is attached to the frame member 11, a part of the buckling prevention guide roller group 52 enters the first opening 114 of the frame member 11 of the spiral winding device 1.

[0074] The feeding device main body 51 constitutes the main body of the lining member feeding device 5. As shown in FIGS. 13 and 14, the feeding device main body 51 includes a bracket 511, a lining member feeding roller 512, a reaction force receiving roller 513, and a motor (hereinafter referred to as "first motor 514").

[0075] The bracket 511 is a member that fixes the lining member feeding device 5 to the frame member 11 of the spiral winding device 1. The lining member feeding roller 512 and the reaction force receiving roller 513 are rotatably attached to the bracket 511.

[0076] The lining member feeding roller 512 is a driving roller that contacts the inner peripheral surface of the lining member 91. As shown in FIG. 14(B), the lining member feeding roller 512 extends along the rotation axis. The rotation axis of the lining member feeding roller 512 is orthogonal to the movement path of the lining member 91. That is, the angle formed by the rotation axis of the lining member feeding roller 512 and the plane orthogonal to the first axis X1 is an angle obtained by adding 90° to the lead angle of the lining member 91.

[0077] As shown in FIG. 14(B), the lining member feeding roller 512 has an anti-slip portion 512a formed on the outer peripheral surface. The anti-slip portion 512a is set such that the friction coefficient with respect to the lining member 91 is higher than the friction coefficient of the reaction force receiving roller 513 with respect to the lining member 91. Examples of the anti-slip portion 512a include a soft material provided on the outer peripheral surface of a core material, and uneven processing (for example, knurling processing, etc.) on the outer peripheral surface of a metal core material. Examples of the core material include metal and resin. Examples of the soft material include synthetic rubber (urethane rubber) and natural rubber.

[0078] As shown in FIG. 14(B), power from the first motor 514 is transmitted to the lining member feed roller 512. The first motor 514 is, for example, a hydraulic motor. The lining member feed roller 512 rotates by the power from the first motor 514. The lining member feed roller 512 rotates while contacting the inner peripheral surface of the lining member 91, thereby applying a propulsive force toward the spiral winding device 1 to the lining member 91.

[0079] The reaction force receiving roller 513 is a driven roller that contacts the outer peripheral surface of the lining member 91. The reaction force receiving roller 513 is rotatably attached to the bracket 511 via a bearing at a position facing the lining member feed roller 512. The rotation axis of the reaction force receiving roller 513 is parallel to the rotation axis of the lining member feed roller 512. The reaction force receiving roller 513 is made of metal. The outer peripheral surface of the reaction force receiving roller 513 is appropriately set according to the shape of the outer peripheral surface of the lining member 91. In the present embodiment, since the displacement absorbing portion 913 protrudes more than the first fitting portion 912 on the outer peripheral surface of the lining member 91, an annular groove 5131 in which the tip of the displacement absorbing portion 913 fits is formed at the central portion in the rotation axis direction of the outer peripheral surface of the reaction force receiving roller 513 as shown in FIG. 14(B).

[0080] The reaction force receiving roller 513 presses the lining member 91 with an appropriate force. Therefore, when the lining member feed roller 512 rotates, the reaction force receiving roller 513 also rotates as the lining member 91 moves. At this time, since the tip of the displacement absorbing portion 913 fits into the annular groove 5131, the movement of the lining member 91 in the width direction is restricted. In the present embodiment, the lining member feed roller 512 is a driving roller, but the reaction force receiving roller 513 may be a driving roller and the lining member feed roller 512 may be a driven roller. Also, both the lining member feed roller 512 and the reaction force receiving roller 513 may be driving rollers. In this case, an anti-slip portion 512a may be provided on the driving roller.

[0081] The buckling prevention guide roller group 52 guides the lining member 91 sent by the feeding device main body 51 into the spiral winding device 1. The buckling prevention guide roller group 52 is provided on the downstream side of the feeding device main body 51 in the moving path of the lining member 91. The longitudinal direction of the buckling prevention guide roller group 52 is parallel to the moving path of the lining member 91. As shown in FIG. 13, the buckling prevention guide roller group 52 includes a plurality of rollers 521 arranged at positions corresponding to both sides in the thickness direction of the lining member 91 in the moving path of the lining member 91. Therefore, the lining member 91 moves along the moving path by the rollers 521 that contact both the inner peripheral surface and the outer peripheral surface.

[0082] The lining member 91 moved by the buckling prevention guide roller group 52 passes through the buckling prevention guide roller group 52 and is smoothly introduced into the spiral winding device 1. The buckling prevention guide roller group 52 guides the lining member 91 into the spiral winding device 1 while restricting the movement of the lining member 91 in the thickness direction by the plurality of rollers 521.

[0083] (Connector guide device 7) As shown in FIG. 15, the connector guide device 7 is a device that feeds a connecting member 92 (that is, a connector 920) to which a reinforcing member 93 is attached into the spiral winding device 1. The connector guide device 7 forms a moving path of the connector 920 from the outside of the spiral winding device 1 to the inside of the spiral winding device 1. As shown in FIG. 15, the connector guide device 7 includes a connector feeding device 71, a bending roller group 72, and a pushing roller 73.

[0084] The connector guide device 7 is fixed to the frame member 11 by a fastening member such as a bolt. When the connector guide device 7 is attached to the frame member 11, the bending roller group 72 is arranged along the outer periphery of the cylindrical portion 111 of the frame member 11 of the spiral winding device 1.

[0085] The connecting body feeder 71 is a device that feeds the connecting body 920 toward the bending roller group 72. As shown in Fig. 16, the connecting body feeder 71 includes a case 711, a connecting body feed roller 712, a reaction force receiving roller 713, and a motor (hereinafter referred to as "second motor 714").

[0086] The case 711 rotatably holds the connecting body feed roller 712 and the reaction force receiving roller 713. The case 711 includes a first case 7111 that rotatably supports the connecting body feed roller 712, a second case 7112 that rotatably supports the reaction force receiving roller 713, and a pair of guide rails 7113.

[0087] The first case 7111 is fixed to the frame member 11. A pair of guide rails 7113 extending in the thickness direction of the connecting body 920 are provided on the first case 7111. The second case 7112 is movably attached along the longitudinal direction of the guide rail 7113. The second case 7112 can be fixed to the guide rail 7113 at an arbitrary position in the longitudinal direction of the guide rail 7113. Thereby, the second case 7112 can move in a direction approaching and a direction away from the first case 7111 (which may be referred to as the "approach and separation direction") in the thickness direction of the connecting body 920.

[0088] The connecting body feed roller 712 is a drive roller that contacts the inner peripheral surface of the connecting body 920. The connecting body feed roller 712 extends along the rotation axis. The rotation axis of the connecting body feed roller 712 is orthogonal to the movement path of the connecting body 920. The connecting body feed roller 712 has an anti-slip portion 712a formed on the outer peripheral surface. The anti-slip portion 712a is set such that the friction coefficient with respect to the connecting body 920 is higher than the friction coefficient of the reaction force receiving roller 713 with respect to the connecting body 920. Examples of the anti-slip portion 712a include a soft material provided on the outer peripheral surface of a core material, uneven processing (e.g., knurling processing, etc.) of the outer peripheral surface of a metal core material, etc. Examples of the core material include metal, resin, etc. Examples of the soft material include synthetic rubber (urethane rubber), natural rubber, etc.

[0089] As shown in Fig. 16(B), the output shaft of the second motor 714 is connected to the connecting body feed roller 712, and the power from the second motor 714 is transmitted. The connecting body feed roller 712 rotates by the power from the second motor 714. The output shaft of the second motor 714 and the steel material feed roller may be directly connected, or may be indirectly connected via a power transmission body such as a speed reducer or a drive belt. The second motor 714 is, for example, a hydraulic motor. The connecting body feed roller 712 rotates while contacting the inner peripheral surface of the connecting body 920 (that is, the inner peripheral surface of the connecting member 92), thereby applying a propulsive force to the connecting body 920 toward the bending roller group 72.

[0090] The reaction force receiving roller 713 is a driven roller that contacts the outer peripheral surface of the reinforcing member 93. The reaction force receiving roller 713 is rotatably attached to the second case 7112 via a bearing at a position facing the connecting body feed roller 712. The rotation axis of the reaction force receiving roller 713 is parallel to the rotation axis of the connecting body feed roller 712. The reaction force receiving roller 713 is made of, for example, metal, resin, or the like.

[0091] The reaction force receiving roller 713 presses the connecting body 920 with an appropriate force. Therefore, when the connecting body feed roller 712 rotates, the reaction force receiving roller 713 also rotates as the connecting body 920 moves. In the present embodiment, the reaction force receiving roller 713 is a driven roller, but the reaction force receiving roller 713 may also be a driving roller together with the connecting body feed roller 712.

[0092] The bending roller group 72 bends the connector 920 sent by the connector feeding device 71 in an arc shape while moving it. The bending roller group 72 is provided on the downstream side of the connector feeding device 71 in the moving path of the connector 920. As shown in FIG. 15, the bending roller group 72 includes a straight portion 721 that moves the connector 920 along a straight line, and an arc portion 722 that moves the connector 920 along an arc while bending it in an arc shape. The straight portion 721 and the arc portion 722 include a plurality of rollers 7211, 7212, 7221, 7222 arranged so as to sandwich the connector 920 in the thickness direction, and the moving path of the connector 920 is formed by this plurality of rollers.

[0093] The straight portion 721 is a portion that forms the moving path of the connector 920 extending along the vertical direction. The straight portion 721 includes a plurality of inner rollers 7211 that contact the inner peripheral surface of the connector 920 and a plurality of outer rollers 7212 that contact the outer peripheral surface of the connector 920. The rotation axes of the inner rollers 7211 and the rotation axes of the outer rollers 7212 are parallel to the rotation axis of the connector feeding roller 712. The connector 920 can move smoothly along the moving path of the connector 920 by being sandwiched between the inner rollers 7211 and the outer rollers 7212.

[0094] The arc portion 722 is a portion that forms the arc-shaped moving path of the connector 920. The arc portion 722 includes a plurality of inner rollers 7221 that contact the inner peripheral surface of the connector 920 and a plurality of outer rollers 7222 that contact the outer peripheral surface of the connector 920. The rotation axes of the inner rollers 7221 and the rotation axes of the outer rollers 7222 are parallel to the rotation axis of the connector feeding roller 712. The inner rollers 7221 are arranged along the arc-shaped moving path and are arranged at positions that contact the inner peripheral surface of the connector 920. The outer rollers 7222 are arranged along the arc-shaped moving path and are arranged at positions that contact the outer peripheral surface of the connector 920.

[0095] As shown in FIG. 15, in the arc portion 722, among the plurality of inner rollers 7221, the downstream roller can be omitted. That is, in the bending roller group 72, in at least the upstream portion of the arc portion 722 (for example, the portion corresponding to 1 / 6 of the arc), by providing the inner roller 7221 and the outer roller 7222, the arc-shaped bending of the connecting body 920 can be realized. However, the inner roller 7221 and the outer roller 7222 may be provided over the entire length of the arc portion 722.

[0096] The connecting body 920 sent by the connecting body feeding device 71 is bent into an arc shape through the moving path of the bending roller group 72.

[0097] The pushing roller 73 is provided on the moving path of the connecting body 920 and forms a moving path for introducing the arc-shaped connecting body 920 into the cylindrical portion 111. The rotation axis of the pushing roller 73 is orthogonal to the moving path of the connecting body 920. According to the pushing roller 73, the radius of curvature of the arc-shaped connecting body 920 can be made smaller. As a result, the connecting body 920 is introduced into the inside of the cylindrical portion 111 through the second opening 115.

[0098] (Connecting device 3) As shown in FIGS. 17 and 18, the connecting device 3 is a device that connects adjacent side edges of the lining member 91 wound by the spiral winding device 1 with the connecting body 920. In the present embodiment, the connecting device 3 connects the adjacent side edges of the lining member 91 by butting the adjacent side edges of the lining member 91 against each other and joining the connecting body 920 so as to straddle the adjacent side edges.

[0099] Specifically, the connecting device 3 includes a fitting roller 31 and an inner roller 32 provided so as to sandwich the connecting body 920 and the lining member 91 in the thickness direction. The connecting device 3 is fixed to the frame member 11 of the spiral winding device 1 using a fastening member such as a bolt. At this time, the fitting roller 31 is fitted into the third opening 116 of the frame member 11 of the spiral winding device 1, and a part of the fitting roller 31 enters the cylindrical portion 111 of the frame member 11.

[0100] The rotation axes of the fitting roller 31 and the inner roller 32 are parallel to the rotation axis of the outer guide roller 12. Further, the fitting roller 31 and the inner roller 32 are provided at axial positions corresponding to positions between 0.65 turns (225 degrees) and 1.65 turns (585 degrees) after the lining member 91 is conveyed into the frame member 11 of the spiral winding device 1.

[0101] The fitting roller 31 is rotatably attached via a bearing so as to contact the outer peripheral surface of the connecting body 920. The fitting roller 31 is made of metal. The fitting roller 31 includes a plurality (here, two) of outer rollers 310. As shown in FIG. 17, the plurality of outer rollers 310 are arranged at regular intervals along the movement path of the connecting body 920. That is, the plurality of outer rollers 310 are arranged along an arc centered on the first axis X1. The rotation axes of the plurality of outer rollers 310 are orthogonal to the movement path of the connecting body 920 and parallel to each other. Each of the outer rollers 310 is fixed to the first gear 311 as shown in FIG. 18.

[0102] The first gear 311 is fixed to the end portion of each outer roller 310 in the rotation axis direction. A pair of adjacent first gears 311 mesh with the second gear 35a, and the second gear 35a meshes with the third gear 35b. The third gear 35b is connected to the output shaft of a motor (hereinafter, the third motor 33). Therefore, when the third gear 35b rotates in one direction by the fifth motor 43, accordingly, the adjacent first gears 311 rotate in the same direction and at the same angular velocity.

[0103] The third motor 33 is, for example, a hydraulic motor. The third motor 33 supplies power to the third gear 35b and rotates the outer roller 310 via the second gear 35a and the first gear 311. The output shaft of the third motor 33 is directly connected to the third gear 35b, but may be indirectly connected via a power transmission body. Further, the output shaft of the third motor 33 may be connected to the second gear 35a or may be connected to each outer roller 310.

[0104] The fitting roller 31, the second gear 35a, the third gear 35b, and the third motor 33 are integrally held by the support frame 26. This support frame 26 is biased toward the inner roller 32 side by a compression coil spring, whereby the fitting roller 31 can press the outer surface of the connecting body 920 (i.e., the outer surface of the reinforcing member 93) with a predetermined pressing force (e.g., 1 kN). Also, by changing the pushing-in amount of the bolt, it is possible to change the pressing force of the fitting roller 31 against the connecting body 920.

[0105] The fitting roller 31 rotates under the driving force of the third motor 33, and rotates while pressing the outer peripheral surface of the connecting body 920 in a state where the connecting body 920 is disposed on the lining member 91. Thereby, the second fitting portion 922 of the connecting member 92 is coupled to the first fitting portion 912 of the lining member 91, and a rotational force is applied to the formed regenerative pipe 9.

[0106] Also, the fitting roller 31 gives the connecting body 920 a propulsive force to draw the lining member 91 into the spiral winding device 1 by rotating while pressing the outer peripheral surface of the connecting body 920. That is, in the present embodiment, by the driving forces of both the connecting device 3 and the lining member feeding device 5, while feeding the lining member 91, the connecting bodies 920 can be sequentially fitted to the adjacent side edges of the lining member 91.

[0107] The inner roller 32 is rotatably provided via a bearing at a position facing the pair of outer rollers 310. An anti-slip portion is formed on the outer peripheral surface of the inner roller 32. This anti-slip portion has an anti-slip function with respect to the lining member 91. Examples of the anti-slip portion include a soft material provided on the outer peripheral surface of a core material, uneven processing (e.g., knurling) of the outer peripheral surface of a metal core material, etc. Examples of the core material include metal, resin, etc. Examples of the soft material include synthetic rubber (urethane rubber), natural rubber, etc.

[0108] The inner roller 32 contacts the inner peripheral surface of the lining member 91. The rotation axis of the inner roller 32 is orthogonal to the movement path of the connecting body 920. The inner roller 32 is disposed on the side opposite to the outer roller 310 with respect to the connecting body 920. As shown in FIG. 17, when viewing the inner roller 32 along its rotation axis, the center of the inner roller 32 is orthogonal to the line segment L1 connecting the centers of adjacent outer rollers 310 and is located on a straight line L2 passing through the midpoint of the line segment L1. Here, the "straight line L2 passing through the midpoint of the line segment L1" includes not only the case where the straight line L2 passes through the midpoint of the line segment L1 but also the case where the straight line L2 substantially passes through the midpoint of the line segment L1. "Substantially passing through the midpoint of the line segment L1" includes a deviation within 10% of the length of the line segment with respect to the midpoint.

[0109] Further, the outer roller 310 is configured to be movable relative to the inner roller 32 in a direction of approaching and separating (sometimes referred to as the "approach-separation direction"). The outer roller 310 according to the present embodiment is movable in the approach-separation direction with respect to the fixed inner roller 32. More specifically, the outer roller 310, the first gear 311, the second gear 35a, the third gear 35b, and the third motor 33 are attached to the frame 36. The frame 36 is configured to be movable in the radial direction with respect to the frame member 11 of the spiral winding device 1. Therefore, the outer roller 310 can move in the approach-separation direction with respect to the inner roller 32. Thereby, the force for sandwiching the reinforcing member 93 between the outer roller 310 and the inner roller 32 can be adjusted, and the curvature of the connecting body 920 when bending the connecting body 920 can be adjusted.

[0110] However, the inner roller 32 may be movable in the approach-separation direction with respect to the fixed outer roller 310. When the inner roller 32 is movable in the approach-separation direction, the inner roller 32 moves parallel along a straight line L2 that is orthogonal to the line segment L1 connecting the centers of adjacent outer rollers 310 and passes through the midpoint of the line segment L1.

[0111] A motor (hereinafter referred to as "fourth motor 34") is connected to the inner roller 32. The fourth motor 34 is, for example, a hydraulic motor. The inner roller 32 rotates upon receiving the driving force from the fourth motor 34, and presses the inner peripheral surface of the connecting portion of the lining member 91 so as to sandwich the connecting portion of the lining member 91 between the inner roller 32 and the fitting roller 31. Further, the inner roller 32 not only receives the reaction force from the fitting roller 31, but also functions as a shape correction roller that aligns the shape of the rehabilitation tube 9 into a cylindrical shape by rotating while pressing the inner peripheral surface of the lining member 91. Furthermore, the inner roller 32 rotates while pressing the inner peripheral surface of the lining member 91, thereby applying a propulsive force to the lining member 91 to draw the lining member 91 into the spiral winding device 1.

[0112] (Overall rotation device 4) The overall rotation device 4 is a device for rotating the entire formed rehabilitation tube 9. As shown in FIGS. 19 and 20, the overall rotation device 4 includes a rehabilitation tube feed roller 41 and a reaction force receiving roller 42. The rehabilitation tube feed roller 41 and the reaction force receiving roller 42 are arranged so as to sandwich the rehabilitation tube 9 from the outer surface side and the inner surface side. The overall rotation device 4 is fixed to the frame member 11 of the spiral winding device 1 using fastening members such as bolts. At this time, the rehabilitation tube feed roller 41 is fitted into the fourth opening 117 of the frame member 11 of the spiral winding device 1, and a part of the rehabilitation tube feed roller 41 enters into the cylindrical portion 111 of the frame member 11.

[0113] The rotation axis of the rehabilitation tube feed roller 41 and the rotation axis of the reaction force receiving roller 42 are parallel to the rotation axis of the outer guide roller 12. Further, the rehabilitation tube feed roller 41 is provided at an axial position corresponding to a position 1.75 turns (630 degrees) after the lining member 91 is conveyed into the frame member 11 of the spiral winding device 1.

[0114] The reaction force receiving roller 42 is provided so as to straddle the positions of 0.75 turns (270 degrees), 1.75 turns (630 degrees), and 2.75 turns (990 degrees) after the lining member 91 is conveyed into the frame member 11 of the spiral winding device 1, that is, so as to straddle the lining member 91 for three turns.

[0115] The regenerated tube feed roller 41 is rotatably attached via a bearing so as to contact the outer surface of the regenerated tube 9. In the present embodiment, the regenerated tube feed roller 41 includes two rollers provided at intervals in the front-rear direction. Further, the regenerated tube feed roller 41 is made of metal, and its outer peripheral surface is provided with an anti-slip process. A plurality of ridges extending along the axial direction and arranged at predetermined intervals in the circumferential direction are formed on the outer peripheral surface of the regenerated tube feed roller 41. By this anti-slip process, the rotational driving force of the regenerated tube feed roller 41 is appropriately transmitted to the lining member 91 without slippage occurring between the regenerated tube feed roller 41 and the lining member 91. However, when the regenerated tube feed roller 41 is formed of a material that does not slip with the lining member 91, it is not always necessary to perform an anti-slip process on the outer peripheral surface of the regenerated tube feed roller 41.

[0116] Further, a motor (fifth motor 43) is connected to the regenerated tube feed roller 41 via a gear portion. The fifth motor 43 is, for example, a hydraulic motor. The regenerated tube feed roller 41, the gear portion, and the fifth motor 43 are integrally held by a support frame. This support frame is biased toward the reaction force receiving roller 42 side by a compression coil spring, whereby the regenerated tube feed roller 41 can press the outer surface of the lining member 91 with a predetermined pressing force. Also, it is possible to change the pressing force of the regenerated tube feed roller 41 against the lining member 91 by changing the pushing-in amount of the bolt.

[0117] Such a regenerated tube feed roller 41 is rotationally driven by receiving a driving force from the fifth motor 43, and gives a rotational force to the regenerated tube 9 by rotating while pressing the regenerated tube 9 from the outer surface side. Further, the regenerated tube feed roller 41 gives a propulsive force (drawing-in force into the spiral winding device 1) to the lining member 91 and the connecting body 920 by rotating while pressing the regenerated tube 9 from the outer surface side.

[0118] The reaction receiving roller 42 is rotatably provided via a bearing at a position facing the regenerated pipe feed roller 41. An anti-slip portion is formed on the outer peripheral surface of the reaction receiving roller 42. This anti-slip portion has an anti-slip function with respect to the lining member 91. Examples of the anti-slip portion include a soft material provided on the outer peripheral surface of a core material, uneven processing (such as knurling) on the outer peripheral surface of a metal core material, etc. Examples of the core material include metal, resin, etc. Examples of the soft material include synthetic rubber (urethane rubber), natural rubber, etc.

[0119] The reaction receiving roller 42 is driven to rotate passively along with the rotational drive of the regenerated pipe feed roller 41 (rotation of the regenerated pipe 9), and presses the inner surface of the regenerated pipe 9 so as to sandwich the regenerated pipe 9 between the reaction receiving roller 42 and the regenerated pipe feed roller 41. Further, this reaction receiving roller 42 not only receives the reaction force from the regenerated pipe feed roller 41, but also functions as a shape correction roller 13 that adjusts the shape of the regenerated pipe 9 to a cylindrical shape by rotating while pressing the inner surface side of the regenerated pipe 9.

[0120] (Leg portion 8) As shown in FIG. 10, the pipe making machine main body 100 has leg portions 8. The leg portions 8 include a connecting frame 81 and a plurality of support portions 82. The connecting frame 81 is made of metal such as stainless steel and is fixed to both side portions of the frame member 11. The support portions 82 penetrate the connecting frame 81 in the vertical direction. A male screw portion that engages with a female screw portion provided on the connecting frame 81 is formed on the outer peripheral surface of the support portion 82, and the installation height of the spiral winding device 1 can be adjusted by this screw mechanism.

[0121] (Operation) In the pipe manufacturing machine main body 100, the regenerated pipe 9 is formed by connecting adjacent side edges of the spirally wound lining member 91 with a connecting body 920. When forming the regenerated pipe 9 by the pipe manufacturing machine main body 100, first, the leading portion of the lining member 91 is set inside the frame member 11 of the spiral winding device 1. At this time, the lining member 91 is fed into the frame member 11 through the lining member feeding device 5, and the lining member 91 is wound spirally for 1.65 turns (that is, up to the fitting position of the connecting device 3).

[0122] In this state, the feeding of the lining member 91 is temporarily stopped, and the lining member 91 is positioned. That is, the circumference (caliber) and the axial position of the lining member 91 are adjusted. Thereby, the pipe manufacturing of the regenerated pipe 9 can be started with the leading portion of the lining member 91 being accurately positioned.

[0123] Next, the connecting member 92 and the reinforcing member 93 are passed between the pressing rollers 210 of the reinforcing device 200, and the connecting member 92 and the reinforcing member 93 are fitted together. Then, the leading portion of the connecting body 920 is set on the pipe manufacturing machine main body 100. At this time, the lining member 91 is passed through the lining member feeding device 5, and the lining member 91 is fed to the fitting position of the connecting device 3 arranged inside the frame member 11. Thereafter, the motors of the lining member feeding roller 512, the connecting device 3, and the overall rotating device 4 are driven.

[0124] Thereby, the lining member feeding roller 512, the fitting roller 31, the inner roller 32, the outer roller 310, and the regenerated pipe feeding roller 41 rotate, and the lining member 91 and the connecting body 920 are continuously supplied into the pipe manufacturing machine main body 100. Then, the adjacent side edges of the lining member 91 are connected by the connecting body 920, and the regenerated pipe 9 is sequentially manufactured. The regenerated pipe 9 manufactured in the pipe manufacturing machine main body 100 is sent forward from the pipe manufacturing machine main body 100 in order from the manufactured portion, and is fed into the existing pipe K1 while rotating.

[0125] (Pipeline regeneration method) An example of a pipeline rehabilitation method for rehabilitating an existing pipe K1 using the rehabilitated pipe 9 manufactured by the pipe manufacturing machine 1000 according to this embodiment will be described. In this embodiment, it is assumed that the existing pipe K1 between the manhole M1 on the starting side and the manhole M1 on the arrival side is rehabilitated.

[0126] As shown in FIG. 1, when rehabilitating the existing pipe K1, first, the pipe manufacturing machine main body 100 is installed in the manhole M1 on the starting side. At this time, the lower part of the spiral winding device 1 is fitted into the invert part of the manhole M1, and the pipe manufacturing machine main body 100 is supported and fixed by the legs 8. Further, for example, the reinforcing device 200 is installed on the ground. Furthermore, a pipe rehabilitation member including a lining member 91, a connecting member 92, and a reinforcing member 93 is arranged on the ground near the manhole M1. It is preferable that the lining member 91, the connecting member 92, and the reinforcing member 93 are each prepared and installed by individually winding them in a roll shape. In addition, the inside of the existing pipe K1 is previously cleaned using a high-pressure washer or the like.

[0127] Next, the rehabilitated pipe 9 is constructed inside the existing pipe K1. That is, the connecting member 92 and the reinforcing member 93 are supplied to the reinforcing device 200 to generate the connecting body 920, and the connecting body 920 and the lining member 91 are supplied from the ground to the pipe manufacturing machine main body 100 installed in the manhole M1, and the rehabilitated pipe 9 formed using the pipe manufacturing machine main body 100 is sequentially fed from inside the manhole M1 on the starting side into the existing pipe K1. The rehabilitated pipe 9 manufactured by the pipe manufacturing machine main body 100 is sequentially fed from the pipe manufacturing machine main body 100 in order from the manufactured part, and is sequentially fed into the existing pipe K1 while rotating toward the manhole M1 on the arrival side.

[0128] When the rehabilitated pipe 9 is constructed over the entire length of the rehabilitation section of the existing pipe K1, subsequently, a filling material is injected between the inner surface of the existing pipe K1 and the outer surface of the rehabilitated pipe 9. In the rehabilitated pipe 9 according to this embodiment, since the connecting member 92 is reinforced by the reinforcing member 93, the rehabilitated pipe 9 itself functions as a self-supporting pipe. That is, in the conventional pipeline rehabilitation method, it was designed to obtain a desired strength by the rehabilitated pipe, the solidified filling, and the existing pipe K1, but in the pipeline configuration method according to this embodiment, a desired strength can be obtained by the rehabilitated pipe 9 alone.

[0129] (Effect) As described above, the pipe manufacturing machine main body 100 according to the present embodiment includes a spiral winding device 1, a connecting device 3 that connects adjacent side edges of the lining member 91 with a connecting member 92, and a reinforcing device 200 that attaches a reinforcing member 93 to the connecting member 92 before connecting the adjacent side edges of the lining member 91 by the connecting member 92.

[0130] According to the pipe manufacturing machine main body 100 according to the present embodiment, since the regenerated pipe 9 with the reinforcing member 93 attached to the connecting member 92 can be manufactured, the strength of the regenerated pipe 9 can be increased. Further, since the lining member 91 and the reinforcing member 93 are combined immediately before forming the regenerated pipe 9, the regenerated pipe 9 is easy to manufacture. For example, if the reinforcing member 93 and the connecting member 92 are connected at the time of factory shipment, when plastically deformed spirally by the pipe manufacturing machine 1000, the longitudinal positional relationship of the reinforcing member 93 with respect to the connecting member 92 cannot be changed, resulting in a difference between the inner peripheral length and the outer peripheral length and making forming difficult. In contrast, according to the pipe manufacturing machine 1000 according to the present embodiment, since the reinforcing member 93 and the connecting member 92 are combined immediately before manufacturing the regenerated pipe 9, even if a difference occurs between the inner peripheral length and the outer peripheral length, the excess can be absorbed before combination, so the manufacturability of the regenerated pipe 9 is good.

[0131] Further, since the reinforcing member 93 has a pair of rib portions 932 facing both side surfaces in the width direction with respect to the connecting member 92 and a top surface portion 931 facing the outer peripheral surface of the connecting member 92 and connecting the pair of rib portions 932, even when an outward stress on the regenerated pipe 9 or a stress in the first axis X1 direction on the regenerated pipe 9 occurs, deformation of the connecting member 92 can be suppressed.

[0132] Further, since the reinforcing member 93 has a pair of hook portions 933 that are hooked on the connecting member 92, deformation of the connecting member 92 inward can be suppressed.

[0133] When the connecting device 3 attaches the connecting body 920 to the lining member 91, the reinforcing member 93 is plastically deformed along an arc centered on the first axis X1. Therefore, even if the reinforcing member 93 is made of metal, a reinforcing member 93 corresponding to the diameter of the rehabilitation pipe 9 can be formed, and a rehabilitation pipe 9 with high strength can be manufactured.

[0134] In addition, since the connecting device 3 includes a plurality of outer rollers 310, an inner roller 32, and a motor that rotates each of the plurality of outer rollers 310 at the same angular velocity, the reinforcing member 93 can be plastically deformed along an arc.

[0135] <Modification example> The above embodiment is merely one of various embodiments of the present invention. The embodiment can be variously modified according to design and the like as long as the object of the present invention can be achieved. Hereinafter, modification examples of the embodiment will be listed. The modification examples described below can be applied in appropriate combinations.

[0136] In the connecting device 3 according to the above embodiment, not only the outer roller 310 but also a motor (fourth motor 34) is connected to the inner roller 32, and both the outer roller 310 and the inner roller 32 are drive rollers. However, the inner roller 32 may be a driven roller that is not driven by a motor. Also, although the pair of outer rollers 310 are driven by one motor (third motor 33), they may be driven by individual motors controlled to be synchronized by a control device.

[0137] The reinforcing member 93 may have a shape as shown in FIG. 21(A). In the reinforcing member 93 according to the above embodiment, the pair of rib portions 932 extend perpendicular to the top surface portion 931, but in this modification example, the pair of rib portions 932 are inclined with respect to the top surface portion 931 so as to expand inward.

[0138] Further, the reinforcing member 93 may have a shape as shown in FIG. 21(B). In the reinforcing member 93 according to the above embodiment, the engaging portion 933 has the base portion 9331 and the inclined portion 9332 bent, but in this modification, the base portion 9331 and the inclined portion 9332 are curved. In particular, the base portion 9331 is formed of a curved surface.

[0139] In the pipe manufacturing machine 1000 according to the above embodiment, the overall rotation device 4 is provided, but if the connecting device 3 and the reinforcing device 200 can apply sufficient rotational force to the regenerated pipe 9, the overall rotation device 4 may not be provided.

[0140] In this specification, expressions with "substantially" such as "substantially the same" may be used. For example, "substantially the same" means substantially "the same", and includes not only a strictly "identical" state but also a state including an error of about several percent of the whole. The same applies to other expressions with "substantially".

[0141] Also, in this specification, expressions distinguished by the presence or absence of "... part" such as "end portion" and "end" are used. For example, "end" means the end part of an object, but "end portion" means a region having a certain range including the "end". Any point within a certain range including the end is regarded as an "end portion". The same applies to other expressions with "... part".

Explanation of Reference Numerals

[0142] 1000 Pipe manufacturing machine 200 Reinforcing device 1 Spiral winding device 3 Connecting device 310 Outer roller 32 Inner roller 33 Third motor (motor) X1 First axis 91 Lining member 92 Connecting member 93 Reinforcing member 931 Top surface portion 932 Rib portion 933 Engaging portion

Claims

1. A pipe manufacturing machine comprising: a spiral winding device for spirally winding a strip-shaped lining member around a first axis; a connecting device for connecting adjacent side edges of the lining member with a connecting member; a reinforcing device for attaching a reinforcing member to the connecting member before connecting the adjacent side edges of the lining member with the connecting member.

2. The reinforcing member has: a pair of rib portions facing both side surfaces in the width direction with respect to the connecting member; a top surface portion facing the outer peripheral surface of the connecting member and connecting the pair of rib portions. The pipe manufacturing machine according to Claim 1.

3. The reinforcing member has: a hooking portion provided at a tip portion of the pair of rib portions opposite to the top surface portion and hooked on the connecting member. The pipe manufacturing machine according to Claim 2.

4. The reinforcing member is made of metal, and when connecting adjacent side edges of the lining member, the connecting device plastically deforms the reinforcing member along an arc centered on the first axis. The pipe manufacturing machine according to any one of Claims 1 to 3.

5. The connecting device has: a plurality of outer rollers arranged along an arc centered on the first axis, including a rotation axis orthogonal to the movement path of the connecting member and in contact with the outer peripheral surface of the reinforcing member; inner rollers arranged on the side opposite to the plurality of outer rollers with respect to the reinforcing member, including a rotation axis parallel to the rotation axis and in contact with the inner peripheral surface of the lining member; a motor for rotating each of the plurality of outer rollers at the same angular velocity. The pipe manufacturing machine according to claim 4.

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