Pipe manufacturing machine

Abstract

To suppress an increase in size of a pipe-manufacturing machine and reduce a number of parts, while allowing a reinforcing member to be attached by a device different from a device for connecting side edge portions of a lining member to each other when manufacturing a helical pipe.SOLUTION: A pipe manufacturing machine 100 comprises: a helical pipe forming device 1 for forming a helical pipe 10a; a reinforcing device 4 for attaching a reinforcing member 9 to an outer peripheral surface of the helical pipe 10a; and an overall rotating device 5. The reinforcing device 4 includes a plurality of rollers for bending the reinforcing member 9 and attaching the resulting member to an outer circumferential surface of the helical pipe 10a. The plurality of rollers include: two driving rollers that press the reinforcing member 9 to the outer circumferential surface of the helical pipe 10a; and a driven roller arranged between the two driving rollers on an inner circumferential surface of the helical pipe 10a. The overall rotating device 5 includes: a first roller that is one of two driving rollers; and a second roller that is located diametrically inside the helical pipe 10a relative to the first roller. The overall rotating device 5 applies rotational force to the helical pipe 10a by sandwiching the helical pipe 10a between the first roller and the second roller.SELECTED DRAWING: Figure 18

Description

[Technical field]

[0001] The present invention relates to a pipe making machine. [Background technology]

[0002] An example of a conventional pipe making machine is disclosed in Patent Document 1. The pipe making machine described in Patent Document 1 includes a spiral winding guide device that spirally winds a lining member, a fitting device that connects adjacent side edges of the wound lining member with a connecting member, and a total rotation device that applies a rotational force to the helical pipe to push the helical pipe into an existing pipe.

[0003] The spiral winding guide device has a cylindrical frame member on which is mounted a fitting device and a general rotation device spaced from the fitting device. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2023-33747 A Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, in the pipe making machine described in Patent Document 1, a plate-shaped reinforcing member is attached to the outer circumferential surface of the connecting member. However, this reinforcing member is attached to the connecting member in advance, and it is necessary to suppress the rigidity to a level that does not interfere with the fitting of the connecting member by the fitting device.

[0006] In response to this, the inventors came up with the idea of ​​forming a helical pipe from a lining member, and then attaching the reinforcing member while bending the reinforcing member to match the radius of curvature of the helical pipe. This allows the reinforcing member to be attached separately from the fitting of adjacent side edges of the lining member, and is expected to provide stronger reinforcement by the reinforcing member.

[0007] However, in this case, the device for fitting the side edges of the lining members together to form the helical pipe, the reinforcing device for attaching the reinforcing member, and the overall rotation device must be installed separately. Installing these devices separately requires the pipe making machine to be larger, and there is a problem in that the number of parts, such as the drive source and drive mechanism, increases.

[0008] The present invention has been made in consideration of the above-mentioned circumstances, and aims to provide a pipe making machine that can, when manufacturing a helical pipe, attach a reinforcing member using a device separate from the device that connects the side edges of the lining member, while preventing the machine from becoming larger and reducing the number of parts. [Means for solving the problem]

[0009] A pipe making machine according to one aspect of the present invention comprises: a spiral pipe forming device for winding a strip-shaped lining member in a spiral shape around a first axis and connecting adjacent side edge portions of the lining member to form a spiral pipe; a reinforcing device for attaching a metallic reinforcing member to an outer peripheral surface of the spiral tube; a rotation device for applying a rotational force around the first axis to the helical tube, the reinforcing device includes a plurality of rollers that bend the reinforcing member so that a radius of curvature of the reinforcing member coincides with a radius of curvature of the helical tube, and attach the reinforcing member to an outer peripheral surface of the helical tube; The plurality of rollers include Two drive rollers, each of which includes a rotation axis extending in a direction along the first axis, is disposed along the outer peripheral surface of the helical tube, and presses the reinforcing member against the outer peripheral surface of the helical tube, and is driven by receiving power from a drive source; a driven roller disposed along an inner circumferential surface of the helical tube and between the two drive rollers in the circumferential direction of the helical tube, the driven roller being rotatable about a rotation axis parallel to the rotation axis of the drive roller; The whole rotating device is a first roller which is one of the two drive rollers in the reinforcement device; a second roller located inside the spiral tube in a diametrical direction with respect to the first roller and rotatable about a rotation axis parallel to the rotation axis of the first roller; The entire rotation device is configured to apply a rotational force to the helical tube by sandwiching the helical tube and the reinforcing member between the first roller and the second roller. Effect of the Invention

[0010] The pipe making machine of the above-mentioned aspect of the present invention has the advantage that when producing a spiral pipe in which a lining member is wound in a spiral shape and the side edges of adjacent lining members are connected, a reinforcing member can be attached using a device separate from the device used for connecting the lining members, while preventing the pipe making machine from becoming larger and reducing the number of parts. [Brief description of the drawings]

[0011] [Figure 1] 1 is a schematic diagram of a pipe making machine according to an embodiment installed in a manhole. FIG. [Diagram 2] 1 is a perspective view of a rehabilitating pipe produced by a pipe producing machine according to an embodiment of the present invention. FIG. [Diagram 3] 1A is a front view of a lining member according to an embodiment, and FIG. 1B is a perspective view of the lining member according to an embodiment. [Figure 4] 10 is a schematic diagram showing how side edge portions of adjacent lining members in a rehabilitating pipe according to an embodiment are connected by a connecting member. FIG. [Diagram 5] 1A is a front view of a reinforcing member according to an embodiment, and FIG. 1B is a perspective view of the reinforcing member according to an embodiment. [Figure 6] 4 is a schematic diagram showing a state in which a reinforcing member is attached to a lining member in a rehabilitating pipe according to an embodiment. FIG. [Figure 7] This is a front view of a pipe making machine installed in a manhole in an embodiment, viewed from front to rear in the first axial direction. [Figure 8] FIG. 2 is a front view of the pipe making machine according to the embodiment. [Figure 9]FIG. 4 is a front view of a frame member according to the embodiment. [Figure 10] FIG. 4 is a development view of a cylindrical portion according to the embodiment. [Figure 11] 1 is a front view of a lining member feeding device according to an embodiment. FIG. [Figure 12] 12(A) is a plan view of an introduction device of a lining member feeding device according to an embodiment, (B) is a cross-sectional view taken along line AA in FIG. 12(A), and (C) is a cross-sectional view taken along line BB in FIG. [Figure 13] 1 is a side view of a lining member feeding device according to an embodiment. FIG. [Figure 14] FIG. 2 is a front view of the reinforcing member guide device according to the embodiment. [Figure 15] 15(A) is an enlarged view of a reinforcing member guide device according to an embodiment, and (B) is a cross-sectional view taken along line DD in FIG. [Figure 16] FIG. 2 is a front view of the connecting device according to the embodiment. [Figure 17] FIG. 2 is a side cross-sectional view of a connecting device according to an embodiment. [Figure 18] FIG. 2 is a front view of the reinforcement device and the entire rotation device according to the embodiment. [Figure 19] FIG. 2 is a side cross-sectional view of the entire rotating device according to the embodiment. [Figure 20] 1A is a cross-sectional view of a reinforcing member according to a modified example, and FIG. 1B is a cross-sectional view of a reinforcing member according to a further modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] <Embodiment> The pipe making machine 100 according to this embodiment will be described in detail below. In this specification, as shown in FIG. 1, a direction parallel to the central axis of an existing pipe K1 underground is defined as the "front-rear direction", and in particular, a direction in which a rehabilitated pipe 10 made by the pipe making machine 100 is sent out is defined as the "forward direction". In this embodiment, the front-rear direction is described as being parallel to a horizontal plane, but it does not necessarily have to be parallel to a horizontal plane. In addition, the "central axis of the existing pipe K1" means the center of gravity of the flow path in a cross section perpendicular to the longitudinal direction of the existing pipe K1. In addition, in this specification, "parallel" includes not only a case where two straight lines, sides, faces, etc. (hereinafter, straight lines, etc.) do not intersect even when extended, but also a case where the angle between the two straight lines, sides, faces, etc. is within a range of 10°.

[0013] In addition, in this specification, the direction perpendicular to the front-to-rear direction may be referred to as the "radial direction of the rehabilitating pipe 10" or "radial direction". In this specification, "perpendicular" includes both the case where two straight lines intersect and the case where two straight lines intersect when extended. "Perpendicular" does not only mean that the angle between two straight lines is strictly 90°, but also includes the case where the angle between two straight lines intersects within a range of ±10°. In addition, the direction toward the outside of the radial direction of the rehabilitating pipe 10 is referred to as the "outward direction". The direction toward the inside of the radial direction of the rehabilitating pipe 10 is referred to as the "inward direction".

[0014] The pipe making machine 100 according to this embodiment is an apparatus for making a rehabilitating pipe 10 for rehabilitating an existing pipe K1. The pipe making machine 100 can send the rehabilitating pipe 10 forward while making the rehabilitating pipe 10. In other words, the pipe making machine 100 according to this embodiment is a front push type pipe making machine.

[0015] As shown in Fig. 2, the pipe making machine 100 can form a helical pipe 10a by spirally winding a strip-shaped lining member 8 around an axis (hereinafter referred to as the "first axis C1") parallel to the front-to-rear direction and connecting adjacent side edge portions of the helically wound lining member 8. The pipe making machine 100 can then form a rehabilitating pipe 10 by attaching a reinforcing member 9 to the helical pipe 10a. In this case, the pipe making machine 100 can send the rehabilitating pipe 10 forward within the existing pipe K1 by rotating it around the first axis C1.

[0016] As shown in FIG. 1, an existing pipe K1 is an underground pipe to be rehabilitated. The existing pipe K1 is buried underground. Examples of the existing pipe K1 include a sewer pipe, a water supply pipe, a wiring pipe, a gas pipe, and an agricultural water pipe. Examples of the cross-sectional shape of the existing pipe K1 include a circular shape, a rectangular shape, and a horseshoe shape. Here, an existing pipe K1 having a circular cross-sectional shape will be described as an example.

[0017] Examples of the material of the existing pipe K1 include reinforced concrete, synthetic resin, and metal. Examples of the inner diameter of the existing pipe K1 include 300 mm or more and 2000 mm or less, and more specifically, 600 mm or more and 1500 mm or less. If the inner diameter of the existing pipe K1 is 300 mm or more and 1000 mm or less, it is difficult for a worker to enter the inside of the existing pipe K1 to perform work, so rehabilitation using the pipe making machine 100 is more appropriate. However, rehabilitation using the pipe making machine 100 can also be performed on an existing pipe K1 with an inner diameter exceeding 2000 mm.

[0018] [Rehabilitation pipe 10] The rehabilitating pipe 10 is a pipe produced by a pipe producing machine 100 using a pipe rehabilitation member. The pipe rehabilitation member comprises a lining member 8 and a reinforcing member 9. As shown in Fig. 1, before the rehabilitating pipe 10 is produced, the lining member 8 and the reinforcing member 9 are each wound around a drum. There are no particular limitations on the position of the drum during production, and the drum may be placed on the bed of a truck, for example, or on the ground.

[0019] (Lining material 8) The lining member 8 is a band-shaped member that constitutes the helical pipe 10a. As shown in FIG. 2, a reinforcing member 9 is attached to the helical pipe 10a to form a rehabilitated pipe 10. The lining member 8 is formed long and has flexibility that allows it to be bent so that its longitudinal direction is along the circumferential direction of the helical pipe 10a. As shown in FIG. 3(A), the lining member 8 includes a base (hereinafter referred to as a lining base 81), a fitting protrusion 82, a fitting recess 84, a stopper portion 85, and abutment portion 86. The lining base 81, the fitting protrusion 82, the fitting recess 84, the stopper portion 85, and the abutment portion 86 are integrally molded, for example, by resin molding.

[0020] In the lining member 8, the surface that constitutes the inner surface of the rehabilitation pipe 10 may be referred to as the "inner circumferential surface of the lining member 8." The inner circumferential surface of the lining member 8 is synonymous with the inner circumferential surface of the lining base 81. In addition, in the lining member 8, the surface opposite the inner circumferential surface may be referred to as the "outer circumferential surface of the lining member 8." The "outer circumferential surface of the lining member 8" is the surface of the lining member 8 that faces outward. In addition, one end of the lining member 8 in the width direction may be referred to as the "first end 87," and the other end may be referred to as the "second end 88."

[0021] The lining base 81 constitutes the main body of the lining member 8. The lining base 81 is formed in a plate shape. One of the main surfaces of the lining base 81 may be referred to as the "first inner surface 811." The first inner surface 811 is a smooth surface, and constitutes the inner surface of the rehabilitation pipe 10 (in other words, the "first inner surface 811" is the "inner circumferential surface of the lining member 8"). The surface of the lining base 81 opposite the first inner surface 811 may be referred to as the "first outer surface 812."

[0022] The width of the lining base 81 (the dimension in the direction perpendicular to the longitudinal direction) is, for example, 50 mm to 100 mm, more specifically, 70 mm to 80 mm, and one example is 75 mm. The thickness of the lining base 81 is, for example, 2 mm to 5 mm, and more specifically, 2 mm to 3 mm, and one example is 2.5 mm.

[0023] The fitting convex portion 82 protrudes outward from a first end 87 in the width direction of the lining base 81. The fitting convex portion 82 is connected to a fitting recess 84 of an adjacent lining member 8. The fitting convex portion 82 is formed over the entire length of the lining base 81 in the longitudinal direction. A retaining portion 821 is formed at the tip of the fitting convex portion 82, the retaining portion 821 being longer in the width direction than the portion of the fitting convex portion 82 other than the tip. The retaining portion 821 is preferably formed over the entire length of the lining base 81 in the longitudinal direction.

[0024] The fitting recess 84 is provided at the second end 88 of the lining base 81, i.e., it is located closer to the second end 88 than the central portion in the width direction of the lining member 8. The fitting recess 84 has an opening surface facing inward, and the fitting protrusion 82 of the adjacent lining member 8 is fitted through the opening surface. A receiving portion 842 that receives the retaining portion 821 of the fitting protrusion 82 is formed at the back of the fitting recess 84. The retaining portion 821 fits into the receiving portion 842, so that the fitting protrusion 82 fits firmly into the fitting recess 84.

[0025] The stopper portion 85 protrudes outward from the lining base 81 between the fitting convex portion 82 and the fitting concave portion 84. More preferably, the stopper portion 85 is disposed between the center portion and the fitting convex portion 82 in the width direction of the lining member 8. A pair of protrusions 851, 852 protruding on both sides in the width direction are formed at the tip portion of the stopper portion 85. Of the pair of protrusions, the protrusion on the fitting convex portion 82 side may be referred to as the "first protrusion 851," and the protrusion on the opposite side may be referred to as the "second protrusion 852."

[0026] Further, a protrusion (hereinafter referred to as a third protrusion 841) that protrudes in the width direction toward the fitting protrusion 82 is formed at the upper end of the fitting recess 84. As shown in FIG. 6, the inclined portion 932 of the reinforcing member 9 is caught by the third protrusion.

[0027] The contact portion 86 protrudes from the fitting recess 84 in a direction from a first end 87 toward a second end 88 in the width direction. The contact portion 86 is composed of a horizontal piece 861 extending in the width direction from the fitting recess 84 and an inclined piece 862 continuing to the horizontal piece 861. The inclined piece 862 is inclined with respect to the horizontal piece 861 so as to progress outward from the end of the horizontal piece 861 toward the outer edge side of the lining member 8. As shown in FIG. 4, when the fitting recess 84 of the adjacent lining member 8 is fitted into the fitting protrusion 82, the inclined piece 862 comes into contact with the first protrusion 851 of the stopper portion 85 and elastically deforms, and the tip of the contact portion 86 engages with the first protrusion 851 of the stopper portion 85. In this manner, in the lining member 8 of this embodiment, when the mating convex portion 82 fits into the mating recess 84, in addition to the anti-slip portion 821 fitting into the receiving portion 842, the tip of the contact portion 86 gets caught on the first protrusion 851 of the stopper portion 85, so that the connection between the mating convex portion 82 and the mating recess 84 is maintained firmly.

[0028] As shown in FIG. 3, the lining base 81 preferably has a displacement absorbing portion 83. The displacement absorbing portion 83 deforms when the rehabilitating pipe 10 receives a force, and relieves the stress generated in the rehabilitating pipe 10. Examples of the "force" include an external force applied to the rehabilitating pipe 10 in the first axis C1 direction, an external force applied to the rehabilitating pipe 10 from the inside toward the outside, an external force applied to the rehabilitating pipe 10 from the outside toward the inside, and a stress (shear stress, compressive stress) generated in the rehabilitating pipe 10. The displacement absorbing portion 83 is formed between the fitting convex portion 82 and the fitting concave portion 84 in the width direction of the lining member 8, and is preferably disposed between the stopper portion 85 and the fitting concave portion 84. In this embodiment, the displacement absorbing portion 83 is formed in the center of the lining member 8 in the width direction.

[0029] The lining base 81 is divided in the width direction by a slit-shaped gap formed between the fitting recess 84 and the fitting protrusion 82 along the longitudinal direction. The displacement absorbing portion 83 connects the opposing ends of the lining base 81 via the gap. The displacement absorbing portion 83 is composed of a pair of side wall portions 831 provided at each end of the divided portion of the lining base 81, and a connecting portion 832 connecting the tip ends of the pair of side wall portions 831. The side wall portions 831 face each other, and the distance between the opposing portions increases as they move outward. The displacement absorbing portion 83 is preferably formed over the entire length of the lining member 8 in the longitudinal direction. The displacement absorbing portion 83 according to this embodiment is formed in a substantially triangular cross section, but may be formed in a substantially U-shaped or C-shaped cross section.

[0030] Examples of the material of the lining member 8 include synthetic resins such as polyethylene resin, polypropylene resin, nylon resin, fluororesin, and hard polyvinyl chloride resin. The lining member 8 is integrally molded by extrusion molding, for example. The lining member 8 according to this embodiment is formed of high-density polyethylene resin.

[0031] (Reinforcing member 9) The reinforcing member 9 reinforces the helical pipe 10a. The reinforcing member 9 is attached to the outer circumferential surface of the helical pipe 10a. The reinforcing member 9 reduces the bending of the lining member 8 in the outward and inward directions. In addition, the reinforcing member 9 can reduce the gap between adjacent lining members 8 caused by the deformation of the lining members 8 when a force is applied to the rehabilitation pipe 10 in the first axis C1 direction. As shown in FIG. 5, the reinforcing member 9 includes a top surface portion 91, a pair of rib portions 92, and a pair of hook portions 93. The top surface portion 91, the rib portions 92, and the hook portions 93 are integrally formed. The reinforcing member 9 is preferably wound in a spiral shape around the first axis C1 and has a length equal to the entire length of the lining member 8, but a plurality of reinforcing members 9 may be joined in sequence and are not necessarily continuous.

[0032] The top surface portion 91 connects a pair of rib portions 92. In the reinforcing member 9 attached to the lining member 8, the top surface portion 91 is disposed across adjacent lining members 8 as shown in FIG.

[0033] The rib portions 92 protrude inward from the widthwise ends of the top surface portion 91. The pair of rib portions 92 sandwich the stopper portions 85 and the fitting recesses 84, thereby preventing the stopper portions 85 from moving away from the contact portions 86 in the adjacent lining members 8.

[0034] The hook portion 93 is provided on the inner end of each rib portion 92 (i.e., the tip portion of the rib portion 92 opposite the top surface portion 91). The hook portion 93 extends from the tip portion of the rib portion 92 in a direction outward (diametrically outward) from the tip portion. The hook portion 93 according to this embodiment includes a base portion 931 extending parallel to the top surface portion 91 from the tip portion of the rib portion 92, and an inclined portion 932. The inclined portion 932 is inclined with respect to the base portion 931 so as to move toward the center in the width direction as it moves outward from the base portion 931.

[0035] 6, the tip of the inclined portion 932 abuts against the second protrusion 852 of the stopper portion 85 and the third protrusion 841 of the fitting recess 84. The hook portion 93 abuts against the second protrusion 852 of one lining member 8 and the third protrusion 841 of the other lining member 8 in adjacent lining members 8, whereby the reinforcing member 9 is attached to the lining members 8.

[0036] Examples of the material of the reinforcing member 9 include metal, synthetic resin, carbon, etc., but metal is preferable in terms of high rigidity, etc. Examples of the metal include stainless steel, steel, titanium, aluminum alloy, etc. The plate thickness of the reinforcing member 9 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 one example is 1.6 mm.

[0037] (Rehabilitation pipe 10) The rehabilitating pipe 10 is a pipe manufactured by a pipe-making machine 100 using the above-mentioned pipe rehabilitation member. As shown in Fig. 2, the rehabilitating pipe 10 is constructed by attaching a reinforcing member 9 to a helical pipe 10a formed by connecting adjacent side edge portions of a lining member 8 wound in a spiral shape with a constant radius around a first axis C1. When the lining member 8 is wound in a spiral shape around the first axis C1, the lining members 8 are adjacent to each other in a cross section on a plane parallel to the first axis C1, as shown in Fig. 6 (in reality, adjacent lining members 8 are the same lining member 8).

[0038] 4, the fitting recess 84 of the adjacent lining member 8 on the front side is fitted into the fitting protrusion 82 of the rear lining member 8 so that the inner circumferential surfaces (first inner surfaces 811) of the adjacent lining members 8 are flush with each other. This is performed sequentially along the longitudinal direction of the lining members 8.

[0039] Thereafter, as shown in Fig. 6, the reinforcing member 9 is arranged so as to straddle the side edge portions of the adjacent lining members 8. Specifically, the reinforcing member 9 is pushed inward so as to sandwich the stopper portion 85 of one of the adjacent lining members 8 and the fitting recess 84 of the other lining member 8. Then, the reinforcing member 9 engages with the second protrusion 852 and the third protrusion 841, and the reinforcing member 9 is attached to the helical tube 10a. This is performed sequentially along the longitudinal direction of the reinforcing member 9.

[0040] Since the reinforcing member 9 in this embodiment is made of metal, when attaching the reinforcing member 9 to the lining member 8, the reinforcing member 9 needs to be bent into a spiral shape while being attached. In this embodiment, a pipe making machine 100 described below can be used to make the helical pipe 10a using the lining member 8 and to attach the reinforcing member 9 to the helical pipe 10a. The overall configuration of the pipe making machine 100 will be described in detail below.

[0041] [Pipe making machine 100] As shown in Fig. 7, the pipe making machine 100 is installed, for example, in a manhole M1, and performs pipe making within the manhole M1. In the following, unless otherwise specified, the pipe making machine 100 will be described based on the position and orientation at which it is installed in the manhole M1. As shown in Fig. 8, the pipe making machine 100 includes a helical pipe forming device 1 that forms a helical pipe 10a, a reinforcing device 4 that attaches a reinforcing member 9 to the helical pipe 10a, and an overall rotation device 5 that applies a rotational force to the helical pipe 10a. The pipe making machine 100 also includes a lining member feeding device 6 that feeds a lining member 8 to the helical pipe forming device 1, and a reinforcing member guide device 7 that feeds a reinforcing member 9 to the reinforcing device 4.

[0042] In the following description, as shown in FIG. 8, when the pipe making machine 100 is viewed from the front to the back along the first axis C1, the central angle of the 0 o'clock position (hereinafter "0 o'clock position") is set to 0°, and the 3 o'clock position (hereinafter "3 o'clock position"), 6 o'clock position (hereinafter "6 o'clock position"), and 9 o'clock position (hereinafter "9 o'clock position") are defined for every 90° of the central angle. In this embodiment, the 0 o'clock position is the top end, the 3 o'clock position is the right end, the 6 o'clock position is the bottom end, and the 9 o'clock position is the left end, but this is merely an example, and for example, the 0 o'clock position may be the left end, the 3 o'clock position is the top end, the 6 o'clock position is the right end, and the 9 o'clock position is the bottom end. In this specification, the term "... o'clock position" includes ±15° of the position of the corresponding short hand. For example, the term "3 o'clock position" includes the position of the short hand of a clock from the position corresponding to 2:30 to the position corresponding to 3:30.

[0043] The reinforcing device 4 is preferably disposed at the 0 o'clock position. At this time, the connecting device 3 described below is disposed between the 3 o'clock position and the 0 o'clock position. The whole rotation device 5 is disposed between the reinforcing device 4 and the connecting device 3. In this embodiment, the whole rotation device 5 is disposed at the 1 o'clock position. Also, the lining member feeding device 6 is preferably disposed between the 0 o'clock position and the 9 o'clock position. In this embodiment, the lining member feeding device 6 and the reinforcing member guide device 7 are disposed at the 10 o'clock position.

[0044] Hereinafter, in explaining the pipe making machine 100, the path along which the lining member 8 moves in the pipe making machine 100 will be referred to as the "movement path of the lining member 8." Similarly, the path along which the reinforcing member 9 moves in the pipe making machine 100 will be referred to as the "movement path of the reinforcing member 9." These movement paths describe a spiral shape centered on the first axis C1, but as paths, they do not have to be separated from other spaces.

[0045] (Spiral tube forming device 1) The helical pipe forming apparatus 1 is an apparatus for forming a helical pipe 10a by winding a strip-shaped lining member 8 in a helical shape around a first axis C1 and connecting adjacent side edge portions of the lining member 8. The helical pipe forming apparatus 1 includes a helical winding device 2 and a connecting device 3.

[0046] (Spiral winding device 2) The spiral winding device 2 is a device that spirally winds the lining member 8 around a first axis C1. The spiral winding device 2 includes a frame member 21 and a plurality of outer guide rollers 22, as shown in FIG.

[0047] The frame member 21 is a frame that holds a plurality of outer guide rollers 22. The frame member 21 is formed in a cylindrical shape. The frame member 21 has a cylindrical portion 211 having a central axis parallel to the first axis C1, and a pair of annular plate portions 212 that protrude outward from both ends in the front-rear direction of the cylindrical portion 211. Examples of materials for the frame member 21 include stainless steel, steel, titanium, and aluminum alloy.

[0048] The outer guide roller 22 is rotatably attached to the cylindrical portion 211. The lining member 8 moves in accordance with the rotation of the outer guide roller 22. Therefore, the outer guide roller 22 forms a moving path of the lining member 8 in the spiral winding device 2. The outer guide roller 22 allows the lining member 8 to move smoothly along the inner circumferential surface of the cylindrical portion 211 so as to draw a spiral shape around the first axis C1. The multiple outer guide rollers 22 are arranged at regular intervals along the inner circumferential surface of the cylindrical portion 211.

[0049] Each outer guide roller 22 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, and a slide bearing. The rollers may be either spherical or cylindrical, but are cylindrical in this embodiment. The rollers may be made of either metal or resin, but are made of metal in this embodiment.

[0050] Here, Fig. 10 shows an expanded view of the cylindrical portion 211 of the spiral winding device 2. In Fig. 10, the movement path R1 of the lining member 8 is shown by an imaginary line. As shown in Fig. 10, the rotation axis of the outer guide roller 22 is along the inner surface of the cylindrical portion 211 and perpendicular to the movement path R1 of the lining member 8. Therefore, the rotation direction of the outer guide roller 22 is parallel to the movement path R1 of the lining member 8. This allows the spiral winding device 2 to move the lining member 8 in a spiral shape.

[0051] The multiple outer guide rollers 22 are preferably arranged so that the lining member 8 can rotate two revolutions (720 degrees) or more inside the cylindrical portion 211. In this embodiment, the outer guide rollers 22 are arranged so that the lining member 8 can rotate 2.75 revolutions (990 degrees).

[0052] The interval W1 between the adjacent outer guide rollers 22 in the first axis C1 direction is set to be approximately the same as the width of the lining member 8. This allows the outer guide rollers 22 to contact each lining member 8 at the same position. Specifically, it is preferable that each outer guide roller 22 contacts a portion of the lining base 81 between the stopper portion 85 and the displacement absorbing portion 83.

[0053] In addition, when the outer guide roller 22 interferes with equipment such as the connecting device 3 or the overall rotation device 5, for example, the outer guide roller 22 can be appropriately omitted at the interfering point, one of the pair of rollers can be omitted, or the spacing between the pair of rollers can be changed.

[0054] The multiple outer guide rollers 22 guide the lining member 8 so as to spirally wind the lining member 8 while overlapping the side edge portions of adjacent lining members 8. At this time, the outer guide rollers 22 enter between the stopper portion 85 and the displacement absorbing portion 83 of the lining member 8, so that the lining member 8 can be positioned in the direction of the first axis C1 of the rehabilitating pipe 10.

[0055] In addition, the outer guide rollers 22 contact the outer peripheral surface of the spirally wound lining member 8, thereby defining the outer diameter of the helical tube 10a. This allows the helical tube 10a to be formed with a constant outer diameter based on the outer diameter of the helical tube 10a.

[0056] Various devices (a connecting device 3, a reinforcing device 4, an overall rotating device 5, a lining member feeding device 6, and a reinforcing member guiding device 7) are attached to the frame member 21. As shown in Fig. 10, a cylindrical portion 211 of the frame member 21 is formed with a first opening 214, a second opening 215, a third opening 216, and a fourth opening 217.

[0057] A part of the lining material feed device 6 is inserted into the first opening 214. The lining material 8 enters the lining material feed device 6, and is guided by the lining material feed device 6 to be introduced into the cylindrical portion 211. The first opening 214 is located at the most upstream side of the movement path of the lining material 8 inside the cylindrical portion 211.

[0058] The reinforcing device 4 and the whole rotation device 5 are inserted into the second opening 215. The reinforcing member 9 is guided by the reinforcing member guide device 7 to move along the outer circumferential surface of the cylindrical portion 211, and is taken into the inside of the cylindrical portion 211 through the fourth opening 217. Then, the reinforcing member 9 is attached to the outer circumferential surface of the spiral tube by the reinforcing device 4.

[0059] A part of the connecting device 3 is inserted into the third opening 216. The connecting device 3 is attached to the cylindrical portion 211 in a state where it is passed through the third opening 216.

[0060] The fourth opening 217 introduces the reinforcing member 9 into the inside of the cylindrical portion 211. As described above, the reinforcing member 9 guided by the reinforcing member guiding device 7 is taken into the inside of the cylindrical portion 211 through the fourth opening 217.

[0061] (Lining material feed device 6) The lining member feeding device 6 is a device that feeds the lining member 8 into the spiral winding device 2. The lining member feeding device 6 has a movement path for the lining member 8, and the movement path is connected from the outside of the spiral winding device 2 to the movement path inside the spiral winding device 2. As shown in Fig. 11, the lining member feeding device 6 includes an introduction device 63, a feeding device main body 61, and a group of buckling prevention guide rollers 62.

[0062] The lining material feed device 6 is fixed to the frame member 21 by fastening members such as bolts. When the lining material feed device 6 is attached to the frame member 21, a part of the buckling prevention guide roller group 62 enters the first opening 214 of the frame member 21 of the spiral winding device 2.

[0063] The introduction device 63 introduces the lining member 8 supplied from outside the pipe making machine 100 into the feeder body 61. As shown in FIG. 11, the introduction device 63 includes a bracket 633 attached to the feeder body 61, and four first guide rollers 631 and two second guide rollers 632 rotatably supported by the bracket 633. The four first guide rollers 631 are arranged to sandwich the lining member 8 in the inward and outward directions, as shown in FIG. 12(A). The rotation axis of the first guide roller 631 is parallel to the width direction of the lining member 8. The two second guide rollers 632 are arranged to sandwich the lining member 8 in the width direction, as shown in FIG. 12(B). The rotation axis of the second guide rollers 632 is parallel to the inward and outward directions of the lining member 8.

[0064] The feeder body 61 applies a propulsive force to the lining member 8 to move the lining member 8. As shown in Fig. 11 and Fig. 12(C), the feeder body 61 includes a bracket 611, a lining member feed roller 612, a reaction force receiving roller 613, and a motor (hereinafter referred to as "first motor 615").

[0065] The bracket 611 fixes the lining member feeding device 6 to the frame member 21 of the spiral winding device 2. The lining member feeding roller 612 and the reaction force receiving roller 613 are attached to the bracket 611 so as to be rotatable.

[0066] The lining member feed roller 612 is a drive roller that contacts the outer circumferential surface of the lining member 8. The rotation axis of the lining member feed roller 612 is perpendicular to the moving path of the lining member 8. That is, the rotation axis of the lining member feed roller 612 is parallel to the width direction of the lining member 8. It is preferable that an anti-slip portion is formed on the outer circumferential surface of the lining member feed roller 612. The friction coefficient of the anti-slip portion with respect to the lining member 8 is set to be equal to or greater than the friction coefficient of the reaction force receiving roller 613 with respect to the lining member 8. Examples of the anti-slip portion include a soft material provided on the outer circumferential surface of a core material, uneven processing (e.g., knurling, etc.) on the outer circumferential surface of a metal core material, and the like. Examples of the core material include metal, resin, and the like. Examples of the soft material include synthetic rubber (urethane rubber), natural rubber, and the like.

[0067] 12(C), power is transmitted to the lining member feed roller 612 from a first motor 615. The first motor 615 is, for example, a hydraulic motor. The lining member feed roller 612 rotates by the power from the first motor 615. The lining member feed roller 612 rotates while contacting the inner circumferential surface of the lining member 8, thereby applying a propulsive force toward the spiral winding device 2 to the lining member 8.

[0068] The reaction force receiving roller 613 is a driven roller that contacts the inner peripheral surface of the lining member 8. The reaction force receiving roller 613 is rotatably attached to the bracket 611 via a bearing at a position facing the lining member feed roller 612. The rotation axis of the reaction force receiving roller 613 is parallel to the rotation axis of the lining member feed roller 612. The reaction force receiving roller 613 is made of, for example, metal.

[0069] The reaction force receiving roller 613 applies an appropriate force to press the lining member 8. Therefore, when the lining member feeding roller 612 rotates, the reaction force receiving roller 613 also rotates as the lining member 8 moves.

[0070] In this embodiment, the lining member feed roller 612 is a drive roller, but the reaction force receiving roller 613 may be a drive roller and the lining member feed roller 612 may be a driven roller. Also, both the lining member feed roller 612 and the reaction force receiving roller 613 may be drive rollers.

[0071] The buckling prevention guide roller group 62 guides the lining member 8 fed by the feed device main body 61 into the spiral winding device 2. The buckling prevention guide roller group 62 is provided downstream of the feed device main body 61 in the movement path of the lining member 8. The longitudinal direction of the buckling prevention guide roller group 62 is parallel to the movement path of the lining member 8. As shown in FIG. 11, the buckling prevention guide roller group 62 includes a plurality of rollers 621 arranged at positions corresponding to both sides of the lining member 8 in the thickness direction in the movement path of the lining member 8. Therefore, the lining member 8 moves along the movement path by the rollers 621 that contact both the inner and outer circumferential surfaces.

[0072] The lining member 8 moved by the buckling prevention guide roller group 62 passes through the buckling prevention guide roller group 62 and is smoothly introduced into the spiral winding device 2. The buckling prevention guide roller group 62 guides the lining member 8 into the spiral winding device 2 while restricting the movement of the lining member 8 in the thickness direction with a plurality of rollers 621.

[0073] (Reinforcing member guide device 7) As shown in Fig. 14, the reinforcing member guide device 7 is a device that feeds the reinforcing member 9 into the spiral winding device 2. The reinforcing member guide device 7 forms a movement path for the reinforcing member 9 from the outside of the spiral winding device 2 to the inside of the spiral winding device 2. As shown in Fig. 14, the reinforcing member guide device 7 includes a reinforcing member feed device 71, a reinforcing member bending roller group 72, and a push-in roller 75.

[0074] The reinforcing member guide device 7 is fixed to the frame member 21 by fastening members such as bolts. When the reinforcing member guide device 7 is attached to the frame member 21, the reinforcing member bending roller group 72 is disposed along the outer periphery of the cylindrical portion 211 of the spiral winding device 2.

[0075] The reinforcing member feed device 71 is a device that feeds the reinforcing member 9 toward the reinforcing member bending roller group 72. As shown in Fig. 15(A), the reinforcing member feed device 71 includes cases 711, 712, reinforcing member feed rollers 713, 714, and a motor (hereinafter, "second motor 715").

[0076] The cases 711 and 712 rotatably hold the reinforcing member feed rollers 713 and 714. The cases 711 and 712 include a fixed case 711 that rotatably supports the reinforcing member feed roller 713, and a movable case 712 that rotatably supports the reinforcing member feed roller 714.

[0077] The fixed case 711 is fixed to the frame member 21. The fixed case 711 supports a rotation shaft of a reinforcing member feed roller 713. The rotation shaft of the reinforcing member feed roller 713 is parallel to the width direction of the reinforcing member 9. The rotation shaft of the reinforcing member feed roller 713 is connected to an output shaft of a second motor 715, and rotates by power from the second motor 715. The second motor 715 is fixed to the fixed case 711.

[0078] A gear 715a is attached to the rotating shaft of the reinforcing member feed roller 713. As shown in FIG. 15, a plurality of gears 715b and 715c are supported on the fixed case 711, and the gear 715a meshes with the gear 715b, and the gear 715b meshes with the gear 715c. The movable case 712 supports the rotating shaft of the reinforcing member feed roller 714. As shown in FIG. 15(B), a gear 716 is fixed to the rotating shaft of the reinforcing member feed roller 714, and the gear 716 meshes with the gear 715c. Therefore, the power from the second motor 715 rotates the reinforcing member feed rollers 713 and 714 in the opposite directions at the same angular velocity.

[0079] The movable case 712 is attached to the fixed case 711 so as to be movable inward and outward directions of the reinforcing member 9. By attaching the movable case 712 to the fixed case 711 so as to be movable, the force with which the reinforcing member 9 is sandwiched by the pair of reinforcing member feed rollers 713, 714 can be adjusted, and the propulsion force of the reinforcing member 9 can be adjusted.

[0080] It is preferable that an anti-slip portion is formed on the outer circumferential surface of the reinforcing member feed rollers 713 and 714. The anti-slip portion can be made of the same material as the anti-slip portion of the lining member feed roller 612.

[0081] The second motor 715 drives the reinforcing member feed rollers 713, 714. The second motor 715 is, for example, a hydraulic motor. The output shaft of the second motor 715 and the reinforcing member feed roller 713 are directly connected to each other, but may be indirectly connected to each other via a power transmission body such as a reducer or a drive belt.

[0082] The reinforcing member bending roller group 72 bends the reinforcing member 9 fed by the reinforcing member feed device 71 into an arc shape while moving it. The reinforcing member bending roller group 72 is provided downstream of the reinforcing member feed device 71 in the movement direction of the reinforcing member 9. As shown in Fig. 14, the reinforcing member bending roller group 72 includes a straight section 73 which moves the reinforcing member 9 along a straight line, and an arc section 74 which moves the reinforcing member 9 along the outer circumferential surface of the spiral winding device 2 while bending it into an arc shape. The straight section 73 and the arc section 74 include a plurality of rollers arranged to sandwich the reinforcing member 9 in the thickness direction, and a movement path of the reinforcing member 9 is formed by these plurality of rollers.

[0083] The straight portion 73 is a portion that forms a movement path of the reinforcing member 9 that extends along the up-down direction. The straight portion 73 includes a plurality of inner rollers 731 that come into contact with the inner peripheral surface of the reinforcing member 9, and a plurality of outer rollers 732 that come into contact with the outer peripheral surface of the reinforcing member 9. The rotation axis of the inner rollers 731 and the rotation axis of the outer rollers 732 are parallel to the rotation axes of the reinforcing member feed rollers 713, 714. The reinforcing member 9 is sandwiched between the inner rollers 731 and the outer rollers 732, so that it can move smoothly along the movement path of the reinforcing member 9.

[0084] The arc portion 74 is a portion that forms an arc-shaped movement path of the reinforcing member 9. The arc portion 74 includes a plurality of inner rollers 741 that come into contact with the inner peripheral surface of the reinforcing member 9, and a plurality of outer rollers 742 that come into contact with the outer peripheral surface of the reinforcing member 9. The rotation axis of the inner rollers 741 and the rotation axis of the outer rollers 742 are parallel to the rotation axes of the reinforcing member feed rollers 713, 714. The inner rollers 741 are disposed along the arc-shaped movement path and at a position where they come into contact with the inner peripheral surface of the reinforcing member 9. The outer rollers 742 are disposed along the arc-shaped movement path and at a position where they come into contact with the outer peripheral surface of the reinforcing member 9.

[0085] Of the multiple inner rollers 741 in the arc portion 74, the roller 741 on the downstream side can be omitted. That is, in the reinforcing member bending roller group 72, by providing the inner roller 741 and the outer roller 742 in at least the upstream portion (for example, a portion corresponding to 1 / 6 arc) of the arc portion 74, it is possible to realize bending of the reinforcing member 9 into an arc shape.

[0086] The push-in roller 75 is provided on the movement path of the reinforcing member 9 and forms a movement path for introducing the arc-shaped reinforcing member 9 into the cylindrical portion 211. The rotation axis of the push-in roller 75 is perpendicular to the movement path of the reinforcing member 9. The push-in roller 75 can reduce the radius of curvature of the arc-shaped reinforcing member 9. As a result, the reinforcing member 9 is introduced into the inside of the spiral winding device 2 through the fourth opening 217.

[0087] (Connection device 3) 16 and 17, the connecting device 3 connects adjacent side edges of the lining member 8 wound by the spiral winding device 2. The connecting device 3 includes a pair of rollers, i.e., an engagement roller 31 and a reaction force receiving roller 32, arranged to sandwich the lining member 8 in the thickness direction. The connecting device 3 is fixed to the frame member 21 using a fastening member such as a bolt. A part of the engagement roller 31 enters the frame member 21 through the third opening 216 of the frame member 21.

[0088] The rotation axes of the fitting roller 31 and the reaction force receiving roller 32 are parallel to the rotation axis of the outer guide roller 22. In addition, the outer guide rollers 22 are disposed on both sides of the fitting roller 31 in the first axis C1 direction. With this configuration, the deviation of the lining member 8 in the first axis C1 direction is reduced, and the stability of the fitting of the lining member 8 by the fitting roller 31 can be improved.

[0089] The fitting roller 31 is rotatably attached via a bearing so as to come into contact with the outer circumferential surface of the fitting recess 84 of the lining member 8. As shown in Fig. 16, the fitting roller 31 is journaled on a connecting device frame 35 fixed to the frame member 21. The fitting roller 31 is made of metal. In this embodiment, the outer circumferential surface of the fitting roller 31 comes into contact with the outer surface of the fitting recess 84 and the outer surface of the stopper portion 85.

[0090] The reaction force receiving roller 32 is rotatably provided via a bearing at a position facing the fitting roller 31. The reaction force receiving roller 32 is supported by the frame member 21.

[0091] It is preferable that an anti-slip portion is formed on the outer circumferential surface of the fitting roller 31 or the outer circumferential surface of the reaction force receiving roller 32. The anti-slip portion can be made of the same material as the anti-slip portion of the lining member feed roller 612.

[0092] A motor (hereinafter, "third motor 33") is connected to the fitting roller 31 via gears 34a and 34b. The third motor 33 is, for example, a hydraulic motor. The fitting roller 31, gears 34a and 34b, and the third motor 33 are held by a coupling device frame 35. The coupling device frame 35 biases the fitting roller 31 toward the reaction force receiving roller 32 side by a compression coil spring 36, so that the fitting roller 31 can press the outer surface of the lining member 8 with a predetermined pressing force (for example, 1 kN). The pressing force of the fitting roller 31 against the lining member 8 can be changed by changing the pressing amount of the adjustment bolt 37.

[0093] Power from the third motor 33 is transmitted to gear 34a, and then to the fitting roller 31 via gear 34b meshing with gear 34a. The fitting roller 31 rotates while pressing a portion of the outer circumferential surface of the lining member 8 that corresponds to the fitting recess 84. As a result, the fitting protrusion 82 of the adjacent lining member 8 is coupled to the fitting recess 84 of the lining member 8, and at the same time, the contact portion 86 is caught on the stopper portion 85.

[0094] (Reinforcement device 4, overall rotation device 5) 18, in this embodiment, the reinforcement device 4 and the whole rotation device 5 are attached to a frame member 21 as one unit. Hereinafter, one unit having the reinforcement device 4 and the whole rotation device 5 is referred to as a reinforcement rotation device S1.

[0095] The reinforcing rotation device S1 includes a first support frame 54 fixed to the frame member 21, a second support frame 55 rotatably attached to the first support frame 54, and a height adjustment mechanism 56 for adjusting the position of the second support frame 55. The rotation axis 1X of the second support frame 55 is perpendicular to the movement path of the reinforcing member 9.

[0096] A first outer bending roller 411 is rotatably attached to the first support frame 54. A second outer bending roller 412 is rotatably attached to the second support frame 55. The first outer bending roller 411 and the second outer bending roller 412 are pressed against the outer circumferential surface of the reinforcing member 9.

[0097] The second support frame 53 also has a motor (hereinafter, the fourth motor 43) and a gear 411a that transmits power from the fourth motor 43 to the outer bending rollers 411, 412. The gear 411a meshes with a gear 411b connected to the output shaft of the fourth motor 43, and also meshes with a gear 411c (FIG. 19) fixed to the two outer bending rollers 411, 412. This allows the two outer bending rollers 411, 412 to rotate in the same direction at the same angular velocity. The fourth motor 43 is, for example, a hydraulic motor.

[0098] The outer bending rollers 411, 412 contact the outer peripheral surface of the reinforcing member 9. The rotation axes of the outer bending rollers 411, 412 extend in a direction along the first axis C1 and are perpendicular to the movement path of the reinforcing member 9. As described above, both of the two outer bending rollers 411, 412 are drive rollers driven by power from the fourth motor 43.

[0099] The first inner roller 42 is a driven roller that contacts the inner peripheral surface of the helical tube 10a. The rotation axis of the first inner roller 42 is parallel to the rotation axes of the outer bending rollers 411, 412 and perpendicular to the moving path of the lining member 8. Here, the term "driven roller" as used in this specification means a roller that rotates in response to the movement of an object in contact with the roller without receiving power from a driving source.

[0100] The first inner roller 42 is disposed on the opposite side of the outer bending rollers 411, 412 with respect to the lining member 8. As shown in FIG. 18, when the inner roller 42 is viewed along the rotation axis of the first inner roller 42, the center of the first inner roller 42 is located on a straight line L2 that is perpendicular to the line segment L1 connecting the centers of the two outer bending rollers 411, 412 and passes through the midpoint of the line segment L1. The "straight line L2 passing through the midpoint of the line segment L1" mentioned here includes the case where the straight line L2 passes through the midpoint of the line segment L1 as well as the case where the straight line L2 substantially passes through the midpoint of the line segment. The "substantially passes through the midpoint of the line segment L1" includes a deviation of 10% or less of the length of the line segment L1 from the midpoint.

[0101] The function of the reinforcing device 4 of the reinforcing rotation device S1 is realized by the first outer bending roller 411, the second outer bending roller 412, the fourth motor 43 and gears 411a and 411b which drive them, and the first inner roller 42. The first outer bending roller 411, the second outer bending roller 412, and the first inner roller 42 can bend the reinforcing member 9 so that the radius of curvature of the reinforcing member 9 matches the radius of curvature of the helical tube 10a, while attaching the reinforcing member 9 to the outer circumferential surface of the helical tube 10a.

[0102] The first support frame 54 has an adjustment unit 541 that can move the first outer bending roller 411 in the inward and outward directions. The adjustment unit 541 can adjust the height position of the first outer bending roller 411 relative to the first inner roller 42. In addition, the second support frame 55 is attached to the first support frame 54 so as to be rotatable about the rotation axis 1X. Therefore, the height position of the second outer bending roller 412 relative to the first inner roller 42 can be adjusted. With this configuration, the radius of curvature of the reinforcing member 9 can be adjusted.

[0103] The reinforcing rotation device S1 also includes a second inner roller 52 located inside the first outer bending roller 411 in the diameter direction of the helical tube 10a. The rotation axis of the second inner roller 52 is parallel to the rotation axis of the first inner roller 42 and perpendicular to the movement path of the lining member 8. Like the first inner roller 42, the second inner roller 52 is a driven roller.

[0104] The function of the whole rotation device 5 of the reinforcing rotation device S1 is realized by the first outer bending roller 411, the fourth motor 43 and the gears 411a and 411b, and the second inner roller 52. The first outer bending roller 411 and the second inner roller 52 can apply a rotational force to the helical tube 10a while sandwiching the reinforcing member 9 and the helical tube 10a.

[0105] It is preferable that the distance between the first outer bending roller 411 and the second inner roller 52 and the distance between the second outer bending roller 412 and the first inner roller 42 are independently variable. In this embodiment, the distance of the first outer bending roller 411 from the first inner roller 42 is variable by an adjustment unit 541 of the first support frame 54. Also, the distance of the second outer bending roller 412 from the first inner roller 42 is variable because the second support frame 53 is adjustable by a height adjustment mechanism 56. With this configuration, the bending of the reinforcing member 9 by the reinforcing device 4 and the rotational force by the whole rotation device 5 can be adjusted independently.

[0106] (leg 11) As shown in Fig. 8, the pipe making machine 100 has a leg portion 11. The leg portion 11 includes a connecting frame 12 and a plurality of support columns 13. The connecting frame 12 is made of a metal such as stainless steel, and is fixed to both sides of a frame member 21. The support columns 13 penetrate the connecting frame 12 in the vertical direction. A male thread portion is formed on the outer circumferential surface of the support columns 13, which threadably engages with a female thread portion provided on the connecting frame 12, and the installation height of the spiral winding device 2 can be adjusted by this screw mechanism.

[0107] (operation) As described above, the pipe making machine 100 forms a rehabilitated pipe 10 by connecting adjacent side edge portions of the spirally wound lining member 8. When forming a rehabilitated pipe 10 with the pipe making machine 100, first, the leading portion of the lining member 8 is set inside the frame member 21 of the spiral winding device 2. At this time, the lining member 8 is fed into the frame member 21 through the lining member feeding device 6, and the lining member 8 is wound spirally for 1.65 revolutions (i.e., up to the fitting position of the connecting device 3).

[0108] In this state, the feeding of the lining member 8 is temporarily stopped and the lining member 8 is positioned. In other words, the circumferential length (diameter) and axial position of the lining member 8 are adjusted. This makes it possible to start pipe manufacturing of the helical tube 10a with the leading end of the lining member 8 accurately positioned.

[0109] Next, the leading end of the reinforcing member 9 is set in the pipe making machine 100. At this time, the reinforcing member 9 is passed through the reinforcing member guide device 7 and fed to the fitting position of the helical pipe 10a in the frame member 21. After that, the second motor 715 of the reinforcing member feeding device 71 and the fourth motor 43 of the reinforcing device 4 and the overall rotation device 5 are driven. This causes the lining member 8 and the reinforcing member 9 to be continuously fed into the pipe making machine 100. Then, the helical pipe 10a is produced in sequence, and the reinforcing member 9 is attached to produce the rehabilitated pipe 10. The rehabilitated pipe 10 produced by the pipe making machine 100 is sent forward by the overall rotation device 5 and fed into the existing pipe K1 while rotating.

[0110] (Pipe rehabilitation method) An example of a pipeline rehabilitation method for rehabilitating an existing pipe K1 using a rehabilitation pipe 10 manufactured by the pipe making machine 100 according to this embodiment will be described. In this embodiment, the existing pipe K1 between a manhole M1 on the starting side and a manhole M1 on the arrival side will be rehabilitated.

[0111] As shown in Fig. 1, when rehabilitating an existing pipe K1, first, a pipe making machine 100 is installed inside a manhole M1 on the starting side. At this time, the lower part of a spiral winding device 2 is fitted into the inverted part of the manhole M1, and the pipe making machine 100 is supported and fixed by legs 11. In addition, pipe rehabilitation members including a lining member 8 and a reinforcing member 9 are placed on the ground near the manhole M1. It is preferable that the lining member 8 and the reinforcing member 9 are each individually wound into a roll and then installed. The inside of the existing pipe K1 is cleaned in advance using a high-pressure washer or the like.

[0112] Next, a rehabilitating pipe 10 is constructed in the existing pipe K1. That is, the lining member 8 and the reinforcing member 9 are supplied to the pipe making machine 100 from above ground, and the rehabilitating pipe 10 formed using the pipe making machine 100 is fed sequentially from inside the manhole M1 on the starting side into the existing pipe K1. The rehabilitating pipe 10 produced by the pipe making machine 100 is fed from the pipe making machine 100 in order starting from the produced portion, and is fed sequentially into the existing pipe K1 toward the manhole M1 on the destination side while rotating.

[0113] After the rehabilitation pipe 10 is installed over the entire length of the rehabilitation section of the existing pipe K1, a filler is then injected between the inner surface of the existing pipe K1 and the outer surface of the rehabilitation pipe 10. In the rehabilitation pipe 10 according to this embodiment, the spiral pipe 10a is reinforced by the reinforcing member 9, so that the rehabilitation pipe 10 itself functions as a self-supporting pipe. That is, while the conventional pipeline rehabilitation method is designed to obtain a desired strength by the rehabilitation pipe 10, the solidified filling, and the existing pipe K1, the pipeline construction method according to this embodiment allows the rehabilitation pipe 10 alone to obtain a desired strength.

[0114] <Modification> The above embodiment is merely one of various embodiments of the present invention. The embodiment can be modified in various ways depending on the design, etc., as long as the object of the present invention can be achieved. Modifications of the embodiment are listed below. The modifications described below can be applied in appropriate combination.

[0115] In the above embodiment, the second inner roller 52 of the overall rotation device 5 is aligned diametrically with respect to the spiral tube 10a relative to the first outer bending roller 411 of the overall rotation device 5 and the reinforcement device 4, but for example, the second inner roller 52 of the overall rotation device 5 may be arranged so as to be aligned diametrically with respect to the second outer bending roller 412.

[0116] The reinforcing member 9 may have a shape as shown in Fig. 20(A). In the reinforcing member 9 according to the above embodiment, the pair of rib portions 92 extend perpendicularly to the top surface portion 91, but in this modification, the pair of rib portions 92 are inclined with respect to the top surface portion 91 so as to widen inwardly.

[0117] 20(B) may be used. In the reinforcing member 9 according to the above embodiment, the hook portion 93 has a bent base portion 931 and an inclined portion 932, but in this modification, the base portion 931 and the inclined portion 932 are curved. That is, the base portion 931 may be formed of a curved surface.

[0118] (effect) As described above, the pipe making machine 100 according to this embodiment includes the helical pipe forming device 1 that forms the helical pipe 10a by winding the strip-shaped lining member 8 in a helical shape around the first axis C1 and connecting adjacent side edges of the lining member 8, the reinforcing device 4 that attaches the metallic reinforcing member 9 to the outer circumferential surface of the helical pipe 10a, and the overall rotation device 5 that applies a rotational force around the first axis C1 to the helical pipe 10a. The reinforcing device 4 includes a plurality of rollers that bend the reinforcing member 9 so that the radius of curvature of the reinforcing member 9 matches the radius of curvature of the helical pipe 10a, while attaching the reinforcing member 9 to the outer circumferential surface of the helical pipe 10a. The rollers include two driving rollers (outer bending rollers 411, 412) that are driven by power from a driving source and are arranged along the inner circumferential surface of the helical tube 10a and between the two driving rollers (outer bending rollers 411, 412) in the circumferential direction of the helical tube 10a, and include a driven roller (inner roller 42) that is rotatable about a rotation axis parallel to the rotation axis of the driving roller, and includes a rotation axis extending in a direction along the first axis C1, and a second roller (second inner roller 52) that is located inside the first roller in the diameter direction of the helical tube 10a and is rotatable about a rotation axis parallel to the rotation axis of the first roller. The whole rotation device 5 is configured to apply a rotational force to the helical tube 10a by sandwiching the helical tube 10a and the reinforcing member 9 between a first roller and a second roller.

[0119] According to this configuration, the drive roller of the entire rotation device 5 can be shared with the drive roller of the reinforcing device 4, which reduces the number of parts such as the drive source and rollers, and also reduces the installation space compared to when the entire rotation device 5 and the reinforcing device 4 are installed separately. In other words, according to this configuration, when producing the spiral tube 10a, the reinforcing member 9 can be attached by a device separate from the connection, while preventing the tube making machine 100 from becoming larger and reducing the number of parts.

[0120] Moreover, the first roller of the whole rotation device 5 is preferably the driving roller (outer bending roller 411) of the two driving rollers in the reinforcing device 4, which is located upstream in the rotation direction of the helical tube 10a.

[0121] As a result, the propulsive force of the whole rotation device 5 can also be used to propel the reinforcing member 9 relative to the reinforcing device 4, and the reinforcing member 9 can be appropriately attached to the helical tube 10a while being curved. [Explanation of symbols]

[0122] 100 Pipe making machine 1 Spiral tube forming device 2. Spiral winding device 21 Frame members 3 Coupling device 31 Mating roller 32 Reaction roller 4 Reinforcement device 41 Outer roller 413 First Gear 411 First outer roller (first roller) 412 Second outer roller 42 Inner roller 5 Whole Rotation Device 52 Second inner roller (second roller) 53 Frames 54 First support frame 541 Adjustment section 55 Second Support Frame 6 Lining material feed device 7 Reinforcement member guide device 8 Lining material 81 Lining base 82 Fitting protrusion 84 Fitting recess 9 Reinforcement members 91 Top section 92 Rib section 93 Hook section

Claims

1. a spiral pipe forming device for forming a spiral pipe by winding a strip-shaped lining member around a first axis and connecting adjacent side edges of the lining member; a reinforcing device for attaching a metallic reinforcing member to an outer peripheral surface of the spiral tube; a rotation device for applying a rotational force around the first axis to the helical tube, the reinforcing device includes a plurality of rollers that bend the reinforcing member so that a radius of curvature of the reinforcing member coincides with a radius of curvature of the helical tube, and attach the reinforcing member to an outer peripheral surface of the helical tube; The plurality of rollers include Two drive rollers, each of which includes a rotation axis extending in a direction along the first axis, is disposed along an outer peripheral surface of the helical tube, and presses the reinforcing member against the outer peripheral surface of the helical tube, the two drive rollers being driven by power from a drive source; a driven roller disposed along an inner peripheral surface of the helical tube and between the two drive rollers in the circumferential direction of the helical tube, the driven roller being rotatable about a rotation axis parallel to the rotation axis of the drive roller; The whole rotating device is a first roller which is one of the two drive rollers in the reinforcement device; a second roller located inside the spiral tube in a diametrical direction with respect to the first roller and rotatable about a rotation axis parallel to the rotation axis of the first roller; The whole rotation device is configured to apply a rotational force to the helical tube by sandwiching the helical tube and the reinforcing member between the first roller and the second roller. Pipe making machine.

2. The first roller of the entire rotating device is the upstream driving roller in the rotation direction of the helical tube, of the two driving rollers in the reinforcing device.

2. The pipe making machine according to claim 1.

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