JP7613691B2 - Pipe making machine and pipe making method - Google Patents

Description

This invention relates to a pipe making machine that is installed inside a manhole and forms a helical pipe by spirally winding a lining member and connecting adjacent side edges of the lining member, and then feeding the formed helical pipe into an existing pipe, and a pipe making method using the machine.

One example of a conventional pipe making machine is disclosed in Patent Document 1. The pipe making device (pipe making machine) of Patent Document 1 includes a rigid mounting box to which a drive motor that holds a gear mechanism and applies a rotational drive force to the gear mechanism is attached, an outer roller and an inner roller that are arranged at the closure site between the tubular body (helical tube) being formed and a newly supplied strip-shaped member (lining member) and clamp and drive the strip-shaped member, with at least the outer roller being a joining roller section that is linked to the gear mechanism, a rigid surrounding box body that straddles the outer roller and is fixed to the mounting box, and an outer periphery regulating frame body that has a spiral ring-shaped frame structure that holds multiple rollers (outer guide rollers) arranged in parallel, is fixed via the surrounding box body, and is arranged in a spiral shape that essentially goes around once along the newly supplied strip-shaped member to the first closure site of the strip-shaped member.

Patent No. 5329370

In the technology of Patent Document 1, a spiral tube is formed by connecting adjacent side edges of a lining member while guiding the lining member to wind in a spiral shape using multiple outer guide rollers held in an outer regulating frame. However, with the technology of Patent Document 1, the lining member cannot be properly pressed against the outer guide rollers, causing the lining member to float up from the outer guide rollers, which may result in the spiral tube not being properly formed.

Therefore, the primary object of this invention is to provide a novel pipe making machine and pipe making method.

Another object of the present invention is to provide a pipe making machine and a pipe making method that can properly press the lining member against the outer guide roller and properly form a helical pipe.

The first invention is a pipe making machine that is installed in a manhole and that forms a helical pipe by spirally winding a lining member and connecting adjacent side edges of the lining member, while sequentially feeding the formed helical pipe into an existing pipe. The machine is equipped with a spiral winding guide device that guides the lining member to be wound helically, a fitting device that connects adjacent side edges of the helically wound lining member, and a lining member feeding device that feeds the lining member into the spiral winding guide device. The spiral winding guide device is equipped with a plurality of outer guide rollers that are spaced apart in the circumferential direction and that abut against the outer surface of the helically wound lining member to determine the outer diameter of the helical pipe, and a frame member that holds the plurality of outer guide rollers. The fitting device rotates while pressing the connecting portion of the lining member from the outer surface side to fit the connecting portion, The lining member feed device includes a lining member feed roller that applies a rotational force to the helical tube, a first hydraulic motor that drives the fitting roller to rotate, and a first reaction force receiving roller that is disposed opposite the fitting roller and presses the inner side of the connecting portion of the lining member so as to pinch the connecting portion of the lining member between the fitting roller and the first reaction force receiving roller. The lining member feed device includes a lining member feed roller that rotates while pressing the inner side or outer side of the lining member to apply a propulsive force to the lining member, a second hydraulic motor that drives the lining member feed roller to rotate, and a second reaction force receiving roller that is disposed opposite the lining member feed roller and presses the outer side or inner side of the lining member so as to pinch the lining member between the lining member feed roller and the lining member feed roller. The peripheral speed of the lining member feed roller is set to a value greater than the peripheral speed of the fitting roller.

In the first invention, the pipe making machine is a push-type pipe making machine that sequentially feeds a spiral pipe formed in a manhole into an existing pipe, and is equipped with a spiral winding guide device, an engagement device, and a lining member feed device. The spiral winding guide device is a device that guides the lining member so that it is wound in a spiral shape. The engagement device is a device that connects adjacent side edge portions of the spirally wound lining member, and is equipped with an engagement roller, a first hydraulic motor, and a first reaction force receiving roller. The lining member feed device is a device that feeds the lining member into the spiral winding guide device, and is equipped with a lining member feed roller, a second hydraulic motor, and a second reaction force receiving roller. In this pipe making machine, the peripheral speed of the lining member feed roller is set to a value greater than the peripheral speed of the engagement roller to make the spiral pipe.

According to the first invention, the lining member feed roller is rotationally driven by the second hydraulic motor, so that the lining member can be properly fed into the spiral winding guide device. In addition, the peripheral speed of the lining member feed roller is set to a value greater than the peripheral speed of the mating roller, so that the lining member can be properly pressed against the outer guide roller, and a cylindrical spiral tube can be properly formed.

The second invention is dependent on the first invention, and the outer circumferential surface of the engaging roller is treated with an anti-slip coating, and the driving force of the second hydraulic motor is set to a value smaller than the driving force of the first hydraulic motor.

According to the second invention, the outer peripheral surface of the mating roller is treated with an anti-slip coating, so that the driving force of the mating roller can be transmitted more appropriately to the connecting portion of the lining member. In addition, the driving force of the second hydraulic motor is set to a value smaller than the driving force of the first hydraulic motor, so that the lining member can be appropriately pressed against the outer guide roller without affecting the rotation of the mating roller.

The third invention is dependent on the first or second invention, and further includes a connecting member guide device that guides a connecting member for connecting adjacent side edges of the lining member to the fitting device, and the fitting roller rotates while pressing the connecting member from the outer surface side, thereby drawing the connecting member into the fitting device without providing a drive unit to the connecting member guide device.

According to the third invention, since a connecting member guide device is provided, the connecting member can be properly guided to the fitting device. In addition, since the connecting member is drawn into the fitting device using the rotational driving force of the fitting roller, the number of motors provided in the pipe making machine can be reduced.

The fourth invention is dependent on the third invention, and the connecting member guide device is formed in a cylindrical shape and is positioned so as to pass outside the frame member.

The fourth invention prevents the connecting member from coming into contact with water in the manhole and becoming dirty, and prevents debris such as shavings from adhering to the connecting member.

The fifth invention is dependent on any one of the first to fourth inventions, and further includes an overall rotation device that rotates the formed helical tube, the overall rotation device includes a helical tube feed roller that rotates while pressing against the outer surface side of the helical tube to apply a rotational force to the helical tube, a third hydraulic motor that rotates the helical tube feed roller, and a third reaction force receiving roller that is provided in a position opposite the helical tube feed roller and presses against the inner surface side of the helical tube so as to sandwich the helical tube between the helical tube feed roller and the third reaction force receiving roller, and the peripheral speed of the helical tube feed roller is set to a value smaller than the peripheral speed of the engagement roller.

According to the fifth invention, since the entire rotation device is provided, the formed helical tube can be pushed into the existing pipe while being rotated appropriately. In addition, a hydraulic motor is used as a drive source for individually rotating the fitting roller of the fitting device and the helical tube feed roller of the entire rotation device, and the peripheral speed of the helical tube feed roller is set to a value smaller than the peripheral speed of the fitting roller, so that the fitting roller of the fitting device and the helical tube feed roller of the entire rotation device can be appropriately synchronized.

The sixth invention is dependent on the fifth invention, and the outer circumferential surface of the spiral tube feed roller is treated with an anti-slip coating, and the driving force of the third hydraulic motor is set to a value greater than the driving force of the first hydraulic motor.

According to the sixth invention, the outer peripheral surface of the helical tube feed roller is treated with an anti-slip coating, so that the driving force of the helical tube feed roller can be properly transmitted to the helical tube. In addition, the driving force of the third hydraulic motor is set to a value greater than the driving force of the first hydraulic motor, so that the engagement roller of the engagement device and the helical tube feed roller of the overall rotation device can be more properly synchronized.

The seventh invention is dependent on any one of the first to sixth inventions, and the multiple outer guide rollers are arranged in a spiral shape, and the frame member is formed in a cylindrical shape.

According to the seventh invention, the outer guide rollers are arranged in a spiral shape, so that the lining member can be guided in a spiral shape appropriately. Also, each of the multiple outer guide rollers pushes the spiral pipe toward the existing pipe, so that the spiral pipe can be pushed out toward the existing pipe more appropriately. Furthermore, by using a cylindrical frame member, the multiple outer guide rollers can be appropriately arranged and held in a spiral shape.

The eighth invention is a pipe making method for forming a helical pipe using a pipe making machine according to any one of the first to seventh inventions, in which the peripheral speed of the lining member feed rollers of the lining member feed device is set to a value smaller than the peripheral speed of the fitting rollers of the fitting device to form the helical pipe.

According to the eighth invention, the same effect as the first invention is achieved, the lining member can be properly pressed against the outer guide roller, and a cylindrical spiral tube can be properly formed.

According to this invention, the lining member feed roller is rotationally driven by the second hydraulic motor, so that the lining member can be properly fed into the spiral winding guide device. In addition, the peripheral speed of the lining member feed roller is set to a value greater than the peripheral speed of the mating roller, so that the lining member can be properly pressed against the outer guide roller, and a cylindrical spiral tube can be properly formed.

The above and other objects, features and advantages of the present invention will become more apparent from the detailed description of the embodiments given below with reference to the drawings.

1 is a schematic diagram showing the process of rehabilitating an existing pipe using a pipe making machine according to one embodiment of the present invention; FIG. FIG. 2 is a perspective view showing an example of a lining member. FIG. 3 is a cross-sectional view showing the lining member of FIG. 2 . FIG. 4 is a perspective view showing an example of a connecting member. FIG. 5 is a cross-sectional view showing the connecting member of FIG. 4 . 5 is a cross-sectional view showing the state in which the side edges of the lining member of FIG. 2 are connected to each other using the connecting member of FIG. 4 . FIG. 1 is a front view showing a pipe making machine according to one embodiment of the present invention as viewed from the existing pipe side. FIG. 8 is a plan view showing the pipe making machine of FIG. 7 . A front view showing a spiral winding guide device provided in the pipe making machine of Figure 7. FIG. 10 is a rear view showing the spiral winding guide device of FIG. 9 . FIG. 10 is a development view showing the spiral winding guide device of FIG. 9 . 8 is a front view showing a lining material feeding device provided in the pipe making machine of FIG. 7. FIG. 13 is a left side view showing the lining member feeding device of FIG. 12 . 13 is a cross-sectional view showing a peripheral portion of a lining member feeding roller of the lining member feeding device of FIG. 12. 13 is a plan view showing a four-way guide roller provided in the lining member feeding device of FIG. 12. 13 is a cross-sectional view showing a periphery of a group of buckling prevention guide rollers of the lining member feeding device of FIG. 12. 8 is a front view showing a connecting member guide device provided in the pipe making machine of FIG. 7 . 8 is a front view showing a fitting device provided in the pipe making machine of FIG. 7. FIG. 19 is a right side view showing the fitting device of FIG. 18 . 19 is a cross-sectional view showing a portion around a fitting roller and a reaction force receiving roller of the fitting device of FIG. 18. 19 is a cross-sectional view showing a fitting roller provided in the fitting device of FIG. 18. A front view showing the overall rotation device provided in the pipe making machine of Figure 7. FIG. 23 is a cross-sectional view showing the entire rotating device of FIG. 22. FIG. 8 is an illustrative view showing the pipe making machine of FIG. 7 installed inside a manhole. This is a cross-sectional view showing how an existing pipe has been rehabilitated using a spiral pipe. FIG. 11 is a cross-sectional view showing another example of a whole rotation device. FIG. 11 is a cross-sectional view showing another example of the engaging roller. FIG. 11 is a cross-sectional view showing still another example of the engaging roller.

Referring to FIG. 1, a pipe making machine 50 according to an embodiment of the present invention is a pipe making machine of the front push type that makes a spiral pipe 202 (lining pipe) for rehabilitating an existing pipe 200 in a manhole 210 and pushes it into the existing pipe 200. As will be described in detail later, the pipe making machine 50 spirally winds the lining member 12 and connects adjacent side edges of the spirally wound lining member 12 with a connecting member 14 to form the spiral pipe 202, while sequentially feeding the formed spiral pipe 202 into the existing pipe 200.

The pipe making machine 50 according to the present invention can be used to rehabilitate various existing pipes 200, such as those made of reinforced concrete, synthetic resin, and metal. The pipe making machine 50 is also suitable for use in rehabilitating medium-sized sewer pipes with diameters of 300 mm or more and less than 1000 mm, which are difficult for workers to enter and work inside, and is particularly suitable for use in rehabilitating sewer pipes with diameters of 600 mm or more and less than 1000 mm. However, the pipe making machine 50 can also be used to rehabilitate existing pipes 200 with diameters of 1000 mm or more.

First, before describing the pipe making machine 50 in detail, an example of the pipe rehabilitation member 10 used in this embodiment will be described. However, the specific configuration and shape of the pipe rehabilitation member 10 described below are merely examples and are not limited to these.

As shown in FIG. 1, the pipe rehabilitation member 10 is a member for forming a spiral pipe 202, and includes a long strip-shaped lining member 12 and a long strip-shaped connecting member 14 that connects adjacent side edges of the spirally wound lining member 12. In this embodiment, the lining member 12 has an engaging portion (first engaging portion 22) with the connecting member 14 on the outer surface side when wound spirally, and the connecting member 14 is engaged with the lining member 12 from the outer surface side of the spirally wound lining member 12. The outer diameter of the spiral pipe 202 formed using the pipe rehabilitation member 10 is set to be slightly smaller than the inner diameter of the existing pipe 200. The configurations of the lining member 12 and the connecting member 14 will be specifically described below.

As shown in Figures 2 and 3, the lining member 12 is a long member that is the main component of the spiral pipe 202, and includes a strip-shaped base 20 (lining base). One main surface 20a of the base 20 is a surface that constitutes the inner surface of the spiral pipe 202, and is a smooth surface. The width of the base 20 is, for example, 75 mm, and the thickness (wall thickness) of the base 20 is, for example, 2.5 mm.

On the other main surface 20b side of the base 20, that is, on both sides of the outer surface side when the lining member 12 is wound in a spiral shape, a first fitting portion 22 is formed to fit with a second fitting portion 32 of the connecting member 14 described later. The first fitting portion 22 includes a first engagement portion 24 formed on both side edges of the other main surface 20b of the base 20, and a third engagement portion 26 formed on the inside of the first engagement portion 24 in the width direction of the base 20. The first engagement portion 24 and the third engagement portion 26 are protrusions extending in the longitudinal direction of the base 20, and the tips of the first engagement portion 24 and the third engagement portion 26 are formed with locking pieces 24a, 26a that protrude toward the inside of the width direction of the base 20.

In addition, a displacement absorbing section 28 is formed in the widthwise center of the base 20, in which a portion of the base 20 is loosened in the width direction so as to protrude toward the other main surface 20b. The displacement absorbing section 28 has a pair of side walls 28a formed to expand in the width direction as it moves away from the one main surface 20a, and a connecting section 28b connecting the tips of the side walls 28a. The protruding height of the displacement absorbing section 28 from the other main surface 20b is, for example, 12 mm.

Such a lining member 12 is integrally molded by extrusion molding of synthetic resin such as polyethylene resin, polypropylene resin, nylon resin, fluororesin, and rigid polyvinyl chloride resin. The lining member 12 in this embodiment is formed from high-density polyethylene resin, and the first fitting portion 22 including the first engaging portion 24 and the third engaging portion 26 and the displacement absorbing portion 28 are formed over the entire longitudinal length of the base body 20.

As shown in Figures 4 and 5, the connecting member 14 is a long member for connecting the side edges of the lining member 12, and includes a connecting member body 16 and a reinforcing member 18. The connecting member 14 is a member that is attached from the outer surface side (the other main surface 20b side) of the lining member 12 as described above, and is placed on the outer surface side of the spiral tube 202 when the spiral tube 202 is formed using the lining member 12 and the connecting member 14.

The connecting member main body 16 includes a strip-shaped base 30 (connecting base). The width of the base 30 is, for example, 37 mm, and the thickness of the base 30 is, for example, 3 mm. One main surface 30a of the base 30 faces the other main surface 20b of the base 20 of the lining member 12, and a second fitting portion 32 that fits with the first fitting portion 22 of the lining member 12 is formed on the one main surface 30a of the base 30. The second fitting portion 32 includes a second engaging portion 34 that engages with the first engaging portion 24 and a fourth engaging portion 36 that engages with the third engaging portion 26. The second engaging portion 34 and the fourth engaging portion 36 are protrusions extending in the longitudinal direction of the base 30, and the tip portions of the second engaging portion 34 and the fourth engaging portion 36 are formed with locking pieces 34a, 36a that protrude toward the inside of the width direction of the base 30.

In addition, water-stopping sections 38 formed in a strip shape from an elastic material such as elastomer are provided on one main surface 30a of the base body 30 between the second engaging section 34 and the fourth engaging section 36, and between the second engaging sections 34 themselves. When the first fitting section 22 of the lining member 12 and the second fitting section 32 of the connecting member 14 are fitted together, the water-stopping sections 38 are sandwiched between the one main surface 30a of the base body 30 and the tips of the first engaging section 24 and the third engaging section 26 of the lining member 12, and are sufficiently compressed (see FIG. 6). This ensures water-tightness at the connecting portions between the side edges of the lining member 12.

Meanwhile, the other main surface 30b of the base 30 is the surface facing the inner surface of the existing pipe 200, and a pair of holding portions 40 for holding the reinforcing member 18 are formed on both side edges of the other main surface 30b of the base 30. Each of the pair of holding portions 40 is a protrusion extending in the longitudinal direction of the base 30, and the tip portions of the pair of holding portions 40 are formed with claw portions 40a that protrude toward the inside of the width direction of the base 30.

The connecting member body 16 is integrally molded by extrusion molding of synthetic resin such as rigid polyvinyl chloride resin, nylon resin, fluororesin, polyethylene resin, and polypropylene resin. The connecting member body 16 in this embodiment is formed of rigid polyvinyl chloride resin, and the second fitting portion 32 including the second engaging portion 34 and the fourth engaging portion 36 and the pair of holding portions 40 are formed over the entire longitudinal length of the base body 30. In addition, the water stop portion 38 is provided over the entire longitudinal length by co-extrusion with the connecting member body 16.

Then, on the other main surface 30b side of the base 30 of the connecting member main body 16, a long reinforcing member 18 is fitted between a pair of retaining parts 40, and is provided over the entire length of the connecting member main body 16 in the longitudinal direction. In this embodiment, a strip-shaped metal member (e.g., strip steel) is used as the reinforcing member 18. The reinforcing member 18 has a rectangular cross-sectional shape, and its width is, for example, 30 mm, and its thickness is, for example, 2.5 mm. By providing the connecting member 14 with the reinforcing member 18, the rigidity of the connecting portion of the spiral tube 202 (the portion where the side edges of the lining member 12 are connected to each other by the connecting member 14) can be increased, and the rigidity of the spiral tube 202 can be increased as a result.

As shown in FIG. 6, when adjacent side edges of the spirally wound lining member 12 are connected by the connecting member 14, the side edges of the base 20 of the lining member 12 are butted together so that the main surfaces 20a of the base 20 are flush with each other. Then, the connecting member 14 is pushed in from the outer surface side of the spirally wound lining member 12, and the second fitting portion 32 of the connecting member 14 is fitted sequentially in the longitudinal direction into the first fitting portion 22 of the lining member 12. Then, the second engaging portion 34 and the fourth engaging portion 36 of the second engaging portion 32 are engaged with the first engaging portion 24 and the third engaging portion 26 of the first fitting portion 22, respectively, and the side edges of the lining member 12 are connected by the connecting member 14.

Next, the configuration of the pipe making machine 50 will be specifically described with reference to Figures 7 to 23. As shown in Figures 7 and 8, the pipe making machine 50 is equipped with a spiral winding guide device 52 that guides the lining member 12 so that it is wound in a spiral shape. This spiral winding guide device 52 is equipped with a lining member feed device 54, a connecting member guide device 56, a fitting device 58, an overall rotation device 60, legs 62, etc.

In this case, when looking at the pipe making machine 50 in the axial direction of the existing pipe 200, it is preferable that the overall rotation device 60 is arranged at the top of the pipe making machine 50, and the lining member feed device 54 and the fitting device 58 are arranged in the upper half of the pipe making machine 50, on both sides of the overall rotation device 60. This allows the width of the pipe making machine 50 as a whole to be reduced, and the pipe making machine 50 can be suitably installed even in a narrow manhole 210. In this embodiment, the overall rotation device 60 is arranged at the top (i.e., 0 o'clock direction). Also, when looking at the pipe making machine 50 from the side of the existing pipe 200 to be rehabilitated, the lining member feed device 54 is arranged at a circumferential position 60 degrees counterclockwise from the overall rotation device 60 (i.e., 10 o'clock direction), and the fitting device 58 is arranged at a circumferential position 45 degrees clockwise from the overall rotation device 60 (i.e., 1:30 direction).

As shown in Figures 9 to 11, the spiral winding guide device 52 includes a number of outer guide rollers 70 that guide the lining member 12 so that it is wound in a spiral shape, and a cylindrical frame member 72 that holds the outer guide rollers 70.

The frame member 72 is made of a metal such as stainless steel, and has a cylindrical portion 72a, a first annular plate portion 72b that protrudes outward from the front end edge of the cylindrical portion 72a, and a second annular plate portion 72c that protrudes inward from the rear end edge of the cylindrical portion 72a. By using the cylindrical frame member 72, the multiple outer guide rollers 70 can be arranged in a spiral shape and appropriately held as described below.

Each of the outer guide rollers 70 includes a pair of rollers spaced apart in the front-rear direction (i.e., the width direction of the lining member 12), and is rotatably mounted on a rotating shaft attached to the inner surface of the cylindrical portion 72a via a bearing such as a deep groove ball bearing. The pair of rollers is made of metal, and the outer peripheral surface is a smooth cylindrical surface without unevenness in the circumferential direction. The outer guide rollers 70 are arranged in a spiral shape at intervals in the circumferential direction of the cylindrical portion 72a (and thus in the circumferential direction of the existing pipe 200 and the spiral pipe 202), and the axial direction of each outer guide roller 70 is inclined at a predetermined inclination angle with respect to the axial direction of the frame member 72. The outer guide rollers 70 are preferably arranged over at least two revolutions (720 degrees) of the lining member 12 that is wound in a spiral shape, and in this embodiment, they are arranged over 2.75 revolutions (990 degrees) of the lining member 12.

The front-rear distance W1 between the outer guide rollers 70 is set to the same size as the width of the base body 20 of the lining member 12 so that the side edges of the base body 20 of the lining member 12 wound in a spiral shape can be butted against each other. The front-rear distance W2 between the pair of rollers of each outer guide roller 70 is set to a distance that allows each of the pair of rollers to enter between the first fitting portion 22 (the outer surface of the connecting member 14 after the connecting member 14 is fitted) of the lining member 12 and the displacement absorbing portion 28 and abut against the other main surface 20b of the base body 20. However, at a position where it interferes with the fitting device 58 or the entire rotation device 60, one of the pair of rollers of the outer guide rollers 70 is omitted, or the circumferential distance between the outer guide rollers 70 is changed.

These multiple outer guide rollers 70 guide the lining member 12 so that it winds in a spiral while butting the side edges of adjacent base bodies 20 against each other. By arranging the outer guide rollers 70 in a spiral arrangement, the lining member 12 can be appropriately guided in a spiral shape, and each of the pair of rollers constituting the outer guide rollers 70 can be inserted between the first fitting portion 22 and the displacement absorbing portion 28 of the lining member 12, so that the positioning of the lining member 12 in the axial direction of the helical tube 202 can be automatically performed. In particular, by butting the side edges of adjacent base bodies 20 against each other, the positioning of the lining member 12 in the axial direction of the helical tube 202 can be more appropriately performed.

The outer guide rollers 70 also contact the other main surface 20b (i.e., the outer surface of the lining member 12) of the base 20 of the lining member 12, which is wound in a spiral shape, to determine the outer diameter of the spiral tube 202. This allows the spiral tube 202 to be formed to a constant size based on the outer diameter. Furthermore, each of the outer guide rollers 70 pushes the formed spiral tube 202 forward (toward the existing pipe 200) by the front side of the pair of rollers contacting the first fitting portion 22 of the lining member 12 or the rear side of the connecting member 14. By each of the outer guide rollers 70 pushing the spiral tube 202, the pushing force can be increased, and the spiral tube 202 can be appropriately pushed into the existing pipe 200.

11, the cylindrical portion 72a of the frame member 72 has openings for mounting the lining member feed device 54, the connecting member guide device 56, the fitting device 58, and the overall rotation device 60, in that order from the upstream side in the feed direction of the lining member 12. Specifically, a first opening 72d into which the lining member feed device 54 is fitted is formed upstream of the outer guide roller 70 arranged at the most upstream side in the 10 o'clock direction when looking at the pipe making machine 50 from the existing pipe 200 side. This first opening 72d becomes the entrance of the lining member 12 into the spiral winding guide device 52. A second opening 72e into which the downstream end of the connecting member guide device 56 is fitted is formed between the outer guide rollers 70 arranged at about half a turn and about one and a half turns from the most upstream side in the 2:30 direction when looking at the pipe making machine 50 from the existing pipe 200 side. This second opening 72e becomes the entrance of the connecting member 14 into the spiral winding guide device 52. Furthermore, a third opening 72f into which the fitting device 58 is fitted is formed downstream of the second opening 72e in the 1:30 direction when looking at the pipe making machine 50 from the existing pipe 200 side. Furthermore, a fourth opening 72g into which the overall rotation device 60 is fitted is formed downstream of the third opening 72f in the 0:00 direction when looking at the pipe making machine 50 from the existing pipe 200 side.

As shown in Figures 12 to 16, the lining member feed device 54 is a device that feeds the lining member 12 supplied from the ground into the spiral winding guide device 52, and includes a feed device main body 74, a four-way guide roller 76, and a group of buckling prevention guide rollers 78. The lining member feed device 54 is fixed to the frame member 72 of the spiral winding guide device 52 using fastening members such as bolts. At this time, the group of buckling prevention guide rollers 78 is fitted into the first opening 72d of the frame member 72 of the spiral winding guide device 52.

The feed device main body 74 includes a pair of rollers that sandwich the lining member 12 in the thickness direction, that is, a lining member feed roller 74a and a reaction force receiving roller 74b (an example of a second reaction force receiving roller). The lining member feed roller 74a is disposed on the inner surface side of the lining member 12, and the reaction force receiving roller 74b is disposed on the outer surface side of the lining member 12.

The lining member feed roller 74a is rotatably mounted via a bearing so as to extend in the front-rear direction. The lining member feed roller 74a has a cylindrical base body made of metal and an outer periphery (surface layer) formed of a soft material such as urethane rubber and provided to cover the base body, and the outer periphery is a smooth cylindrical surface without unevenness in the circumferential direction. A hydraulic motor 74c (an example of a second hydraulic motor) is connected to this lining member feed roller 74a. The lining member feed roller 74a is driven to rotate by receiving a driving force from the hydraulic motor 74c, and rotates while pressing the inner side of the lining member 12 (specifically, one main surface 20a of the base body 20), thereby applying a propulsive force to the lining member 12 toward the spiral winding guide device 52.

On the other hand, the reaction force receiving roller 74b is rotatably provided via a bearing at a position facing the lining member feed roller 74a. The reaction force receiving roller 74b is made of metal, and its outer circumferential surface is formed to match the shape of the outer surface side of the lining member 12. In this embodiment, the outer surface side of the lining member 12 has a shape in which the displacement absorbing portion 28 protrudes more than the first fitting portion 22, so that an annular groove 74d into which the tip of the displacement absorbing portion 28 can be fitted is formed in the axial center of the outer circumferential surface of the reaction force receiving roller 74b. The reaction force receiving roller 74b rotates while pressing the outer surface side of the lining member 12 (specifically, the first fitting portion 22 and the tip of the displacement absorbing portion 28) in accordance with the rotational drive of the lining member feed roller 74a (transport of the lining member 12). In addition, the tip of the displacement absorbing portion 28 is fitted into the annular groove 74d, thereby restricting the movement of the lining member 12 in the width direction. The arrangement of the lining member feed roller 74a and the reaction force receiving roller 74b may be reversed so that the lining member feed roller 74a, which is the driving roller, presses against the outer surface of the lining member 12.

The four-way guide roller 76 is provided upstream of the feed device main body 74 (lining member feed roller 74a) in the feed direction of the lining member 12. The four-way guide roller 76 has at least four regulating rollers that are rotatably provided to surround the inner and outer surfaces and both sides of the lining member 12. In this embodiment, the four-way guide roller 76 is made of metal and includes two pairs of rollers 76a for regulating the thickness direction that are provided at an interval in the feed direction of the lining member 12, and a pair of rollers 76b for regulating the width direction that are provided between these pairs of rollers 76a. Such a four-way guide roller 76 guides the lining member 12 between the lining member feed roller 74a and the reaction force receiving roller 74b while regulating the movement of the lining member 12 in the thickness direction and width direction. Therefore, by providing the four-way guide roller 76 to the lining member feed device 54, the lining member 12 can be smoothly guided between the lining member feed roller 74a and the reaction force receiving roller 74b.

The buckling prevention guide roller group 78 is provided downstream of the feed device main body 74 (lining member feed roller 74a) in the feed direction of the lining member 12. The buckling prevention guide roller group 78 includes a plurality of roller pairs 78a rotatably arranged to sandwich the lining member 12 from the outer surface side and the inner surface side. In this embodiment, the roller pair 78a is made of metal and is composed of a pair of rollers 78b arranged at positions corresponding to both ends of the lining member 12 in the width direction. In other words, the roller pair 78a includes four rollers 78b arranged to sandwich both ends of the lining member 12 in the width direction from the outer surface side and the inner surface side. These multiple roller pairs 78a are arranged in a straight line along the feed direction of the lining member 12 so as to connect between the lining member feed roller 74a and the outer guide roller 70 arranged at the most upstream side of the spiral winding guide device 52. In addition, a rectangular regulating frame 78c is provided at the downstream end of the buckling prevention guide roller group 78 so as to surround the roller pairs 78a. Such a buckling prevention guide roller group 78 guides the lining member 12 into the spiral winding guide device 52 while regulating the movement of the lining member 12 in the thickness direction by the multiple roller pairs 78a. In addition, the movement of the lining member 12 in the width direction is regulated by the regulating frame 78c. Therefore, by providing the buckling prevention guide roller group 78 to the lining member feed device 54, the lining member 12 can be smoothly guided into the spiral winding guide device 52 while preventing the lining member 12 from buckling.

As shown in FIG. 17, the connecting member guide device 56 is a device that guides the connecting member 14 supplied from the ground into the fitting device 58, and is formed in a cylindrical shape from a metal such as stainless steel. When looking at the pipe making machine 50 from the existing pipe 200 to be rehabilitated, the connecting member guide device 56 has an inlet portion 56a (upstream end) that receives the connecting member 14 at 10:30. The connecting member guide device 56 passes through the outside of the lower half of the cylindrical portion 72a of the frame member 72 provided in the spiral winding guide device 52 and extends to a position near the fitting device 58, and its outlet portion 56b (downstream end) is fitted into the second opening 72e of the frame member 72. In addition, a bulge portion 56c that bulges toward the radial outside of the frame member 72 is formed on the upstream side of the outlet portion 56b, and the outlet portion 56b extends linearly along the tangential direction at the fitting position of the lining member 12.

By providing such a connecting member guide device 56 in the pipe making machine 50, the connecting member 14 can be smoothly guided to the fitting device 58, and the side edges of the lining member 12 can be properly connected to each other by the connecting member 14 in the fitting device 58. Furthermore, by forming the connecting member guide device 56 in a cylindrical shape, the connecting member 14 is prevented from coming into contact with the water in the manhole 210 and becoming dirty, and from being contaminated by shavings and other debris adhering to the connecting member 14. In particular, if foreign matter adheres to the water stop portion 38 provided on the connecting member 14, there is a risk that the water stop portion 38 will not perform its water stop function properly, but this is prevented by the cylindrical connecting member guide device 56.

As shown in Figures 18-21, the fitting device 58 is a device that connects adjacent side edges of the spirally wound lining member 12. In this embodiment, the fitting device 58 connects adjacent side edges of the lining member 12 by butting the adjacent side edges of the lining member 12 against each other and fitting the connecting member 14 from the outer surface side of the lining member 12.

Specifically, the fitting device 58 includes a pair of rollers, that is, a fitting roller 80 and a reaction force receiving roller 82 (an example of a first reaction force receiving roller), that are arranged to sandwich the connecting portion of the lining member 12 including the connecting member 14 in the thickness direction. The fitting device 58 is fixed to the frame member 72 of the spiral winding guide device 52 using a fastening member such as a bolt. At this time, the fitting roller 80 is fitted into the third opening 72f of the frame member 72 of the spiral winding guide device 52, and a part of the fitting roller 80 protrudes into the cylindrical portion 72a of the frame member 72.

The axial direction of the fitting roller 80 and the reaction force receiving roller 82 is the same direction (parallel) as the axial direction of the outer guide roller 70. The fitting roller 80 and the reaction force receiving roller 82 are provided at an axial position corresponding to between a position 0.65 revolutions (225 degrees) and a position 1.65 revolutions (585 degrees) after the lining member 12 is transported into the frame member 72 of the spiral winding guide device 52. One of the outer guide rollers 70 is provided behind the circumferential position where the fitting roller 80 is provided. This outer guide roller 70 abuts against the outer surface of the lining member 12 to be newly fitted. By arranging the outer guide roller 70 side by side at the same circumferential position as the fitting roller 80, the stability of the fitting between the lining member 12 and the connecting member 14 can be increased.

The engaging roller 80 is rotatably mounted via a bearing so as to abut against the outer surface of the connecting member 14. The engaging roller 80 is made of metal, and its outer circumferential surface 80a is formed to a shape that matches the shape of the outer surface of the connecting member 14. In this embodiment, the outer surface of the connecting member 14 is shaped so that the pair of retaining portions 40 on both sides in the width direction protrude further than the reinforcing member 18 in the width direction center, so that an annular protrusion 80b that can be fitted between the pair of retaining portions 40 and abut against the outer surface of the reinforcing member 18 is formed in the axial center of the outer circumferential surface 80a of the engaging roller 80.

In addition, the outer peripheral surface 80a of the engaging roller 80 is treated with an anti-slip treatment. In this embodiment, the outer peripheral surface 80a of the engaging roller 80 is formed into a rough surface with multiple fine irregularities. This anti-slip treatment prevents slippage between the engaging roller 80 and the connecting member 14, and the rotational driving force of the engaging roller 80 is appropriately transmitted to the connecting member 14 (and thus the helical tube 202). However, this anti-slip treatment may be applied to the entire outer peripheral surface 80a of the engaging roller 80, or may be applied only to the contact portion with the connecting member main body 16. In addition, in cases where the engaging roller 80 is formed of a material that does not cause slippage between the engaging roller 80 and the connecting member 14, it is not necessarily necessary to apply an anti-slip treatment to the outer peripheral surface 80a of the engaging roller 80.

A hydraulic motor 86 (an example of a first hydraulic motor) is connected to the engaging roller 80 via a gear section 84. The engaging roller 80, gear section 84 and hydraulic motor 86 are held together by a support frame 88. This support frame 88 is biased toward the reaction force receiving roller 82 by a compression coil spring 90, which allows the engaging roller 80 to press the outer surface side of the connecting member 14 with a predetermined pressing force (for example, 100 kgf). It is also possible to change the pressing force of the engaging roller 80 against the connecting member 14 by changing the pressing amount of the bolt 92.

Such a fitting roller 80 is driven to rotate by receiving a driving force from a hydraulic motor 86, and rotates while pressing the connecting portion of the lining member 12 (specifically, the reinforcing member 18 and a pair of holding portions 40 of the connecting member 14) from the outer surface side, thereby fitting the second fitting portion 32 of the connecting member 14 to the first fitting portion 22 of the lining member 12 and applying a rotational force to the formed spiral tube 202. In addition, the fitting roller 80 rotates while pressing the connecting member 14 from the outer surface side, thereby sequentially drawing the connecting member 14 into the fitting device 58 without providing a driving portion to the connecting member guide device 56. This allows the number of motors provided in the pipe making machine 50 to be reduced. Furthermore, the fitting roller 80 rotates while pressing the connecting member 14 from the outer surface side, thereby providing the lining member 12 with an auxiliary propulsive force that draws the lining member 12 into the spiral winding guide device 52. That is, in this embodiment, the lining member 12 is fed by the driving forces of both the fitting device 58 and the lining member feed device 54, while the connecting members 14 are fitted sequentially to adjacent side edges of the lining member 12.

On the other hand, the reaction force receiving roller 82 is rotatably provided via a bearing at a position facing the engaging roller 80. The reaction force receiving roller 82 has a cylindrical base body made of metal and an outer periphery formed of a soft material such as urethane rubber and provided to cover the base body, and its outer periphery is a smooth cylindrical surface without unevenness in the circumferential direction. A hydraulic motor 94 is connected to this reaction force receiving roller 82. The reaction force receiving roller 82 is rotated by receiving a driving force from the hydraulic motor 94, and presses the inner side of the connecting portion of the lining member 12 (specifically, a position straddling one main surface 20a of the adjacent base body 20) so as to sandwich the connecting portion of the lining member 12 between the engaging roller 80. In addition, the reaction force receiving roller 82 not only receives the reaction force from the engaging roller 80, but also functions as a shape correction roller that adjusts the shape of the spiral tube 202 into a cylindrical shape by rotating while pressing the inner side of the lining member 12. Furthermore, the reaction force receiving roller 82 rotates while pressing against the inner surface of the lining member 12, thereby providing the lining member 12 with an auxiliary driving force that draws the lining member 12 into the spiral winding guide device 52.

As shown in Figures 22 and 23, the whole rotation device 60 is a device for rotating the whole of the formed spiral tube 202. The whole rotation device 60 includes a pair of rollers, i.e., a spiral tube feed roller 100 and a reaction force receiving roller 102 (an example of a second reaction force receiving roller), that are arranged to sandwich the spiral tube 202 from the outer and inner sides. The whole rotation device 60 is fixed to the frame member 72 of the spiral winding guide device 52 using a fastening member such as a bolt. At this time, the spiral tube feed roller 100 is fitted into the fourth opening 72g of the frame member 72 of the spiral winding guide device 52, and a part (lower part) of the spiral tube feed roller 100 protrudes into the cylindrical portion 72a of the frame member 72.

The axial direction of the spiral tube feed roller 100 and the reaction force receiving roller 102 is the same direction (parallel) as the axial direction of the outer guide roller 70. The spiral tube feed roller 100 is provided at an axial position corresponding to a position 1.75 revolutions (630 degrees) after the lining member 12 is transported into the frame member 72 of the spiral winding guide device 52. One of the outer guide rollers 70 is provided behind the circumferential position where the spiral tube feed roller 100 is provided. This outer guide roller 70 abuts against the outer surface of the lining member 12 to be newly fitted. By arranging the outer guide rollers 70 side by side at the same circumferential position as the spiral tube feed roller 100, the stability of power transmission to the spiral tube 202 can be improved.

On the other hand, the reaction force receiving roller 102 is positioned so as to straddle the positions 0.75 revolutions (270 degrees), 1.75 revolutions (630 degrees), and 2.75 revolutions (990 degrees) after the lining member 12 is transported into the frame member 72 of the spiral winding guide device 52, that is, so as to straddle three revolutions of the lining member 12.

The spiral tube feed roller 100 is rotatably mounted via a bearing so as to abut against the outer surface of the spiral tube 202 (specifically, the other main surface 20b of the base body 20 of the lining member 12). In this embodiment, the spiral tube feed roller 100 includes two rollers spaced apart in the front-rear direction. The spiral tube feed roller 100 is made of metal, and its outer circumferential surface 100a is treated with an anti-slip treatment. In this embodiment, the outer circumferential surface 100a of the spiral tube feed roller 100 has a plurality of protrusions extending along the axial direction and arranged at predetermined intervals in the circumferential direction. This anti-slip treatment prevents slippage between the spiral tube feed roller 100 and the lining member 12, and the rotational driving force of the spiral tube feed roller 100 is appropriately transmitted to the lining member 12 (and thus the spiral tube 202). However, if the spiral tube feed roller 100 is made of a material that does not slip between it and the lining member 12, it is not necessary to apply an anti-slip treatment to the outer circumferential surface 100a of the spiral tube feed roller 100.

A hydraulic motor 106 (an example of a third hydraulic motor) is connected to the spiral tube feed roller 100 via a gear unit 104. The spiral tube feed roller 100, the gear unit 104, and the hydraulic motor 106 are integrally held by a support frame 110 that is provided so as to be rotatable in the vertical direction via a hinge unit 108. This support frame 110 is biased toward the reaction force receiving roller 102 side by a compression coil spring 112, which allows the spiral tube feed roller 100 to press the outer surface of the lining member 12 with a predetermined pressing force. In addition, the pressing force of the spiral tube feed roller 100 against the lining member 12 can be changed by changing the pressing amount of the bolt 114.

The spiral tube feed roller 100 is driven to rotate by the driving force from the hydraulic motor 106, and applies a rotational force to the spiral tube 202 by rotating while pressing the spiral tube 202 from the outer surface side. In addition, the spiral tube feed roller 100 rotates while pressing the spiral tube 202 from the outer surface side, thereby providing auxiliary propulsion force (pulling force into the spiral winding guide device 52) to the lining member 12 and the connecting member 14.

On the other hand, the reaction force receiving roller 102 is rotatably mounted via a bearing at a position opposite the spiral tube feed roller 100. The reaction force receiving roller 102 has a cylindrical metal base body and an outer periphery formed of a soft material such as urethane rubber and provided to cover the base body, and the outer periphery is a smooth cylindrical surface with no irregularities in the circumferential direction.

The reaction force receiving roller 102 rotates in response to the rotational drive of the helical tube feed roller 100 (rotation of the helical tube 202) and presses the inner surface of the helical tube 202 so as to sandwich the helical tube 202 between the helical tube feed roller 100 and the reaction force receiving roller 102. In addition to receiving the reaction force from the helical tube feed roller 100, the reaction force receiving roller 102 also functions as a shape correction roller that adjusts the shape of the helical tube 202 into a cylindrical shape by rotating while pressing the inner surface of the helical tube 202.

7 and 8, the leg 62 is made of a metal such as stainless steel, and includes a connecting frame 120 fixed to both sides of the frame member 72, and four support columns 122 that are provided to penetrate the connecting frame 120 in the vertical direction. A male thread is formed on the outer periphery of the support columns 122, which screws into a female thread provided on the connecting frame 120, and this screw mechanism makes it possible to adjust the installation height of the spiral winding guide device 52.

As shown in FIG. 7, shape correction rollers 124 are provided on the inner surface of the spiral winding guide device 52 at the 4 o'clock and 8 o'clock positions when looking at the pipe making machine 50 from the existing pipe 200 to be rehabilitated. The shape correction roller 124 has a cylindrical metal base and an outer periphery formed of a soft material such as urethane rubber and provided to cover the base, and the outer periphery is a smooth cylindrical surface without unevenness in the circumferential direction. The shape correction roller 124 is provided so as to abut against the inner surface of the spiral pipe 202 and to extend in the axial direction of the frame member 72. The shape correction roller 124 rotates in accordance with the rotation of the spiral pipe 202, and rotates while pressing the inner surface of the spiral pipe 202, thereby adjusting the shape of the spiral pipe 202 into a cylindrical shape.

In such a pipe making machine 50, the adjacent side edges of the lining member 12 wound in a spiral shape are connected to each other by the connecting member 14 to form the spiral pipe 202. When forming the spiral pipe 202 by the pipe making machine 50, first, the leading portion of the lining member 12 is set in the frame member 72 of the spiral winding guide device 52. At this time, the lining member 12 is fed into the frame member 72 through the lining member feeding device 54, and the lining member 12 is wound in a spiral shape for 1.65 revolutions (i.e., up to the fitting position of the fitting device 58). Then, in this state, the winding of the lining member 12 is temporarily stopped, and the lining member 12 is positioned. In other words, the circumferential length (diameter) and axial position of the lining member 12 are adjusted. This allows the production of the spiral pipe 202 to be started with the leading portion of the lining member 12 accurately positioned.

Next, the leading end of the connecting member 14 is set in the pipe making machine 50. At this time, the connecting member 14 is passed through the connecting member guide device 56 and sent to the fitting position of the fitting device 58 arranged in the frame member 72. Then, the hydraulic motor 74c of the lining member feed roller 74a, the hydraulic motors 86, 94 of the fitting device 58, and the hydraulic motor 106 of the overall rotation device 60 are driven. As a result, the lining member feed roller 74a, the fitting roller 80, the reaction force receiving roller 82, and the spiral tube feed roller 100 are rotated, and the lining member 12 and the connecting member 14 are continuously supplied into the pipe making machine 50, and the adjacent side edges of the lining member 12 are connected to each other by the connecting member 14, so that the spiral tube 202 is sequentially made. The spiral pipe 202 produced in the pipe production machine 50 is pushed forward from the pipe production machine 50 in order from the produced portion, and is fed into the existing pipe 200 while rotating.

When manufacturing the spiral pipe 202, the side edges of the base 20 of the lining member 12 are butted together, making it easy to position the lining member 12 and to manufacture the pipe. In addition, since the connecting member 14 is attached from the outer surface side of the spirally wound lining member 12, it is easy to manufacture the spiral pipe 202 even if it is a size (i.e., a relatively small diameter) corresponding to the existing pipe 200 of a medium diameter of 300 mm or more and less than 1000 mm, which is difficult to manufacture with a pipe manufacturing machine that attaches a connecting member from the inner surface side of the lining member. Furthermore, since the spiral pipe 202 is formed using two members, the lining member 12 and the connecting member 14, the side edges of the lining member 12 can be connected and fixed to each other by the connecting member 14 after the lining member 12 is rotated and positioned. Therefore, when forming the helical pipe 202, it is easy to match the circumferential length (diameter) of adjacent lining members 12, and it is possible to form a helical pipe 202 with a uniform diameter over the entire axial length.

When manufacturing the helical pipe 202, the helical pipe 202 is rotated using the helical pipe feed roller 100 (i.e., hydraulic motor 106) of the overall rotation device 60 in addition to the driving force from the engagement roller 80 (i.e., hydraulic motor 86) of the engagement device 58, so that sufficient driving force can be exerted and the formed helical pipe 202 can be pushed out into the existing pipe 200 while being properly rotated.

Furthermore, since the lining member 12 is provided with a propulsive force by using the lining member feed roller 74a (i.e., the hydraulic motor 74c) of the lining member feed device 54, the lining member 12 can be properly fed into the spiral winding guide device 52. However, when the lining member 12 is fed into the spiral winding guide device 52, it may not be possible to press the lining member 12 firmly against the outer guide roller 70, and the spiral tube 202 may not be properly formed.

Therefore, in this embodiment, the peripheral speed of the lining member feed roller 74a is set to a value greater than the peripheral speed of the fitting roller 80. In this way, by feeding the lining member 12 into the spiral winding guide device 52 at a speed faster than the fitting speed, the lining member 12 can be appropriately pressed against the outer guide roller 70, and the cylindrical spiral tube 202 can be appropriately formed. The lining member feed roller 74a applies a propulsive force to the lining member 12 while causing slippage between the lining member 12 and the roller 74a. The peripheral speed ratio between the fitting roller 80 and the lining member feed roller 74a is preferably, for example, 1:1.1 to 1.3. In this embodiment, the peripheral speed of the lining member feed roller 74a is set to 1.2 with the peripheral speed of the fitting roller 80 being 1.

In addition, in this embodiment, the driving force of the hydraulic motor 74c that rotates the lining member feed roller 74a is set to a value smaller than the driving force of the hydraulic motor 86 that rotates the fitting roller 80. This allows the lining member feed roller 74a to feed the lining member 12 into the spiral winding guide device 52 and press it appropriately against the outer guide roller 70 without affecting the rotation of the fitting roller 80, which has a large force. The driving force ratio between the hydraulic motor 86 and the hydraulic motor 74c is preferably, for example, 1:0.4 to 0.6, and in this embodiment, the target torque of the hydraulic motor 86 is set to 1 and the target torque of the hydraulic motor 106 is set to 0.5.

In addition, in this embodiment, in order to accurately synchronize the individually driven fitting roller 80 and the spiral tube feed roller 100, hydraulic motors 86, 106 are used as the driving sources for the fitting roller 80 and the spiral tube feed roller 100, and the peripheral speed of the spiral tube feed roller 100 is set to a value smaller than the peripheral speed of the fitting roller 80. A hydraulic motor has the characteristic that it rotates at a slower peripheral speed than the set peripheral speed when the load becomes excessive. In addition, since the outer surface 80a of the fitting roller 80 and the outer surface 100a of the spiral tube feed roller 100 are treated with anti-slip processing, the fitting roller 80 is synchronized with the spiral tube feed roller 100, which has a lower peripheral speed. The peripheral speed ratio of the fitting roller 80 and the spiral tube feed roller 100 is preferably, for example, 1:0.8 to 0.9, and in this embodiment, the peripheral speed of the fitting roller 80 is set to 1 and the peripheral speed of the spiral tube feed roller 100 is set to 0.83. The peripheral speed of the reaction force receiving roller 82, which is rotated by the hydraulic motor 94, is set to the same value as the peripheral speed of the engagement roller 80.

Furthermore, in this embodiment, the driving force (torque output by the motor) of the hydraulic motor 106 that rotates the spiral tube feed roller 100 is set to a value greater than the driving force of the hydraulic motor 86 that rotates the engagement roller 80. This allows the engagement roller 80 to be more appropriately synchronized with the rotation of the spiral tube feed roller 100, which has a greater force. The driving force ratio (target torque ratio) between the hydraulic motor 86 and the hydraulic motor 106 is preferably, for example, 1:1.5 to 2.5, and in this embodiment, the target torque of the hydraulic motor 86 is set to 1, and the target torque of the hydraulic motor 106 is set to 2.0.

Next, referring to Figures 1, 24, and 25, an example of a pipeline rehabilitation method for rehabilitating an existing pipe 200 with a spiral pipe 202 manufactured using the above-mentioned pipe manufacturing machine 50 will be described. In this embodiment, the existing pipe 200 between the starting manhole 210 and the arrival manhole 212 is to be rehabilitated.

As shown in Figures 1 and 24, when rehabilitating an existing pipe 200, first, a pipe making machine 50 is installed inside a manhole 210 on the starting side. At this time, the lower part of a spiral winding guide device 52 is fitted into the inverted part of the manhole 210, and the pipe making machine 50 is supported and fixed by legs 62. In addition, a pipe rehabilitation member 10 including a lining member 12 and a connecting member 14 is installed on the ground near the manhole 210. The lining member 12 and the connecting member 14 should be prepared and installed individually wound into rolls. The inside of the existing pipe 200 is cleaned in advance using a high-pressure washer or the like.

Next, the spiral pipe 202 is installed in the existing pipe 200. That is, the lining member 12 and the connecting member 14 are supplied from the ground to the pipe making machine 50 installed in the manhole 210, and the spiral pipe 202 formed by using this pipe making machine 50 is fed sequentially from inside the manhole 210 on the starting side into the existing pipe 200. In the pipe making machine 50, the lining member 12 is wound spirally so that the side edges of the base 20 of the lining member 12 are butted against each other, and the connecting member 14 is attached from the outer surface side of the lining member 12 to connect the adjacent side edges of the lining member 12, thereby producing the spiral pipe 202. The spiral pipe 202 produced in the pipe making machine 50 is pushed out of the pipe making machine 50 in order from the produced portion, and is fed sequentially into the existing pipe 200 toward the manhole 212 on the destination side while rotating.

After the spiral pipe 202 has been installed over the entire length of the rehabilitated section of the existing pipe 200, filler material 204 is then injected between the inner surface of the existing pipe 200 and the outer surface of the spiral pipe 202. As the filler material 204 hardens, a rehabilitated pipe 206 (composite pipe) is formed in which the existing pipe 200 and the spiral pipe 202 are integrated, as shown in FIG. 25. Cleanup work and other procedures are then carried out as appropriate to complete the rehabilitation work of the existing pipe 200.

As described above, according to this embodiment, since the pipe making machine 50 is equipped with the lining member feed device 54, the lining member 12 can be appropriately fed into the spiral winding guide device 52. In addition, since the peripheral speed of the lining member feed roller 74a is set to a value greater than the peripheral speed of the engagement roller 80, the lining member 12 can be appropriately pressed against the outer guide roller 70, and the cylindrical spiral pipe 202 can be appropriately formed. Furthermore, since the driving force of the hydraulic motor 74c (second hydraulic motor) is set to a value less than the driving force of the hydraulic motor 86 (first hydraulic motor), the lining member 12 can be appropriately pressed against the outer guide roller 70 without affecting the rotation of the engagement roller 80.

In addition, according to this embodiment, the pipe making machine 50 is equipped with an overall rotation device 60, so that the formed helical pipe 202 can be pushed into the existing pipe 200 while being rotated appropriately. In addition, hydraulic motors 86, 106 are used as the driving sources for the fitting roller 80 and the helical pipe feed roller 100, and the peripheral speed of the helical pipe feed roller 100 is set to a value smaller than the peripheral speed of the fitting roller 80, so that the fitting roller 80 and the helical pipe feed roller 100 can be properly synchronized. Furthermore, the driving force of the hydraulic motor 106 (third hydraulic motor) is set to a value larger than the driving force of the hydraulic motor 86, so that the fitting roller 80 and the helical pipe feed roller 100 can be more properly synchronized.

The specific configuration or shape of the above-mentioned pipe rehabilitation member 10 (lining member 12 and connecting member 14) can be changed as appropriate. In addition, it is not necessary to connect the lining members 12 using the connecting member 14. It is also possible to form mating parts on both side edges of the lining members 12 that can fit into each other, and directly connect the side edges of the lining members 12 to each other. In other words, the connecting part of the lining members 12 may or may not include the connecting member 14.

The specific configuration or shape of each part of the pipe making machine 50 can also be changed as appropriate. For example, in the above embodiment, the helical tube feed roller 100 is configured with two rollers, and one turn of the lining members 12 arranged in the axial direction is pressed by the helical tube feed roller 100 (see FIG. 23). In contrast, as shown in FIG. 26, the helical tube feed roller 100 can be configured with four rollers, and three turns of the lining members 12 arranged in the axial direction can be pressed by the helical tube feed roller 100. This improves the transmission performance of the driving force of the helical tube feed roller 100 to the helical tube 202, so that the helical tube 202 can be pushed into the existing pipe 200 while rotating more appropriately.

The specific shape of the rollers arranged on the outer side of the spiral tube 202 can be changed as appropriate to match the shapes of the outer sides of the lining member 12 and the connecting member 14. For example, as shown in FIG. 27, when using a connecting member 14 that does not have a reinforcing member 18, it is preferable to use a mating roller 80 with a ring-shaped protrusion 80b with a large protruding height, and to abut the ring-shaped protrusion 80b against the other main surface 30b of the base 30 of the connecting member 14. Also, as shown in FIG. 28, when using a connecting member 14 that has a T-shaped rib 42 on the other main surface 30b of the base 30, it is preferable to use a mating roller 80 that does not have a ring-shaped protrusion 80b, and to abut the outer circumferential surface 80a of the mating roller 80 against the rib 42 of the connecting member 14.

In addition, in the above-mentioned embodiment, a composite pipe (rehabilitation pipe 206) is formed by integrating the existing pipe 200 and the spiral pipe 202 with the filler 204, but this is not limited to the above. The pipe making machine 50 according to the present invention can also form a self-supporting pipe that maintains its strength independently from the existing pipe 200.

Note that the specific values such as dimensions listed above are merely examples and can be changed as necessary depending on the product specifications, etc.

REFERENCE SIGNS LIST 10 pipe rehabilitation member 12 lining member 14 connecting member 50 pipe making machine 52 spiral winding guide device 54 lining member feed device 56 connecting member guide device 58 fitting device 60 overall rotation device 70 outer guide roller 72 frame member 74a lining member feed roller 74b reaction force receiving roller (second reaction force receiving roller)
74c ... hydraulic motor (second hydraulic motor)
80 ... fitting roller 82 ... reaction force receiving roller (first reaction force receiving roller)
84 ... hydraulic motor (first hydraulic motor)
100 ... Spiral tube feed roller 102 ... Reaction force receiving roller (third reaction force receiving roller)
106 ... hydraulic motor (third hydraulic motor)
200: Existing pipe 202: Spiral pipe 204: Filling material 206: Rehabilitation pipe 210, 212: Manhole

Claims (8)

A pipe making machine that is installed in a manhole, forms a helical pipe by spirally winding a lining material and connecting adjacent side edges of the lining material, and sequentially feeds the formed helical pipe into an existing pipe,
a spiral winding guide device for guiding the lining member so as to wind it in a spiral shape;
a fitting device for connecting adjacent side edge portions of the spirally wound lining member, and a lining member feeding device for feeding the lining member into the spiral winding guide device,
The spiral winding guide device is
a plurality of outer guide rollers arranged at intervals in a circumferential direction and contacting an outer surface of the lining member wound in a spiral shape to define an outer diameter of the helical tube; and a frame member for holding the plurality of outer guide rollers,
The fitting device includes:
a fitting roller that rotates while pressing the connecting portion of the lining member from the outer surface side to fit the connecting portion and applies a rotational force to the helical tube;
a first hydraulic motor that rotates the fitting roller; and a first reaction force receiving roller that is provided at a position facing the fitting roller and presses an inner surface side of the connecting portion of the lining member so as to sandwich the connecting portion of the lining member between the fitting roller and the first reaction force receiving roller.
The lining member feeding device is
a lining member feed roller that rotates while pressing the inner surface or the outer surface of the lining member to impart a propulsive force to the lining member;
a second hydraulic motor that rotates the lining member feed roller; and a second reaction force receiving roller that is provided at a position opposite to the lining member feed roller and presses an outer surface side or an inner surface side of the lining member so as to sandwich the lining member between the lining member feed roller and the lining member feed roller.
A pipe making machine, wherein the peripheral speed of the lining member feed roller is set to a value greater than the peripheral speed of the fitting roller. The outer circumferential surface of the engaging roller is subjected to an anti-slip treatment,
The pipe making machine according to claim 1 , wherein the driving force of the second hydraulic motor is set to a value smaller than the driving force of the first hydraulic motor. a connecting member guide device for guiding a connecting member for connecting adjacent side edge portions of the lining member to the fitting device,
3. A pipe making machine according to claim 1, wherein the engaging roller rotates while pressing the connecting member from the outer surface side, thereby drawing the connecting member into the engaging device without providing a drive unit in the connecting member guide device. The pipe making machine according to claim 3, wherein the connecting member guide device is formed in a cylindrical shape and is arranged to pass outside the frame member. Further, a whole rotating device is provided for rotating the formed helical tube,
The whole rotating device is
a helical tube feed roller that rotates while pressing the outer surface side of the helical tube to apply a rotational force to the helical tube;
a third hydraulic motor that rotates the helical tube feed roller; and a third reaction force receiving roller that is disposed opposite the helical tube feed roller and presses the inner surface of the helical tube so as to sandwich the helical tube between the helical tube feed roller and the third reaction force receiving roller.
5. A pipe making machine according to claim 1, wherein the peripheral speed of the spiral pipe feed roller is set to a value smaller than the peripheral speed of the engagement roller. The outer circumferential surface of the spiral tube feed roller is treated with an anti-slip treatment,
6. A pipe making machine according to claim 5, wherein the driving force of the third hydraulic motor is set to a value greater than the driving force of the first hydraulic motor. The plurality of outer guide rollers are arranged in a spiral shape,
The pipe making machine according to claim 1 , wherein the frame member is formed into a cylindrical shape. A pipe making method for forming a helical pipe using the pipe making machine according to any one of claims 1 to 7, comprising the steps of:
A pipe making method in which the peripheral speed of a lining member feed roller provided in the lining member feed device is set to a value smaller than the peripheral speed of an engagement roller provided in the engagement device to form the helical pipe.

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