JP6940098B2 - Pipe making machine, pipe making method of pipe body and strip-shaped member - Google Patents

Description

The present invention relates to a pipe making machine, a pipe making method of a pipe body, and a strip-shaped member, and in particular, for example, connects adjacent side edges of a strip-shaped member spirally wound along the inner surface of an existing pipe. It relates to a pipe making machine, a pipe making method of a pipe body, and a strip-shaped member for forming a pipe body.

An example of a conventional pipe making machine (lining construction machine) is disclosed in Patent Document 1. The pipe making machine of Patent Document 1 has a strip (strip-shaped member) feeding roller that spirally advances in the pipe length direction in an existing pipe to be lined, and a strip gathering for pulling the fed strips in a predetermined direction. It is provided with a vessel and a hammer or presser roller that drives or pushes a mortise-like joint strip drawn from a reel into or pushes into a mortise-like joint ear portion formed on an adjacent winding side edge of a strip.

Japanese Unexamined Patent Publication No. 7-100927

In the technique of Patent Document 1, the fitting of the connecting portion of the spirally wound strip-shaped member is performed by pressing the inner surface of the connecting portion with a roller or the like toward the existing pipe side using the existing pipe or spacer as a backup. It is done in. However, a portion where it is difficult to obtain a reaction force from the existing pipe or spacer (that is, a strip-shaped member is floating) such as an uneven portion of the existing pipe, a connecting portion (a portion having a bend, a bend or a step), or a portion on both sides of the spacer. In some cases, the fitting was insufficient and the connection could not be performed properly.

Therefore, a main object of the present invention is to provide a novel pipe making machine, a pipe making method of a pipe body, and a strip-shaped member.

Another object of the present invention is to provide a pipe making machine, a pipe making method of a pipe body, and a strip plate-shaped member capable of reliably connecting adjacent side edges of the strip-shaped member.

The first invention is a pipe making machine for forming a pipe body by connecting adjacent side edges of strip-shaped members spirally wound along the inner surface of an existing pipe with each other by using a connecting member. It is provided with a pipe making machine main body, an arm provided on the pipe making machine main body and extending in the radial direction and rotating in the circumferential direction of the pipe body to be formed, and a matching unit provided at the tip of the arm. The unit is a frame that holds a pair of pressing rollers and a pair of pressing rollers that sandwich and press the connecting portion of the strip-shaped member including the adjacent side edges of the strip-shaped member and the connecting member from the inner surface side and the outer surface side. , And a pipe making machine provided with a guide roller held by the frame on the front side in the rotation direction of the arm with respect to the pair of pressing rollers and guiding adjacent side edges and connecting members of the strip-shaped members between the pair of pressing rollers. Is.

In the first invention, the pipe making machine forms a pipe body by connecting adjacent side edge portions of spirally wound strip-shaped members with each other by using a connecting member. Equipped with the machine body. The main body of the pipe making machine is provided with an arm that extends in the radial direction of the pipe body and can rotate in the circumferential direction. A matching unit is provided at the tip of the arm. The merging unit includes a pair of pressing rollers provided at predetermined intervals in the radial direction of the pipe body . The pressing roller sandwiches and presses the connecting portion of the strip-shaped member including the adjacent side edge portion of the strip-shaped member and the connecting member from the inner surface side and the outer surface side. Further, the combining unit is held by the frame that holds the pair of pressing rollers and the frame on the front side in the rotation direction of the arm with respect to the pair of pressing rollers, and the adjacent side edges and connecting members of the strip-shaped member. Is provided with a guide roller that guides the vehicle between the pair of pressing rollers.

According to the first invention, since the connecting portion of the strip-shaped member is sandwiched and pressed from the inner surface side and the outer surface side, adjacent side edges of the strip-shaped member regardless of the presence or absence of a reaction force from an existing pipe or the like. The parts can be reliably connected to each other.

The second invention is dependent on the first invention, and of the pair of pressing rollers, the outer roller that presses the outer surface side of the connecting portion of the strip-shaped member rolls on the inner surface of the existing pipe.

According to the second invention, since the outer roller rolls on the inner surface of the existing pipe, the arm and the pair of pressing rollers can be stably rotated.

The third invention is a method for making a pipe body using a pipe making machine according to the first or second invention, wherein (A) a strip-shaped member is spirally wound along the inner surface of an existing pipe. After the step of turning and temporarily making a pipe and (B) step (A), a pair of pressings provided by the pipe making machine with adjacent side edges and connecting members of the strip-shaped member by a guide roller provided with the pipe making machine. While guiding between the rollers, the connecting portion of the strip-shaped member including the adjacent side edge portion of the strip-shaped member and the connecting member is sandwiched and pressed from the inner surface side and the outer surface side by a pair of pressing rollers to press the connecting portion. It is a pipe making method of a pipe body including a step of fitting and forming a pipe body.

In the third invention, a pipe body is formed in an existing pipe by using a pipe making machine provided with a pair of pressing rollers. First, in step (A), the spiral pipe is temporarily manufactured by spirally winding the strip-shaped member along the inner surface of the existing pipe. Then, in step (B), adjacent side edge portions of the temporarily formed strip-shaped members are connected to each other by a connecting member to form a tubular body. At this time, the guide roller guides the adjacent side edges and the connecting members of the strip-shaped members between the pair of pressing rollers, and the strip-shaped members including the adjacent side edges and the connecting members of the strip-shaped members. By sandwiching and pressing the connecting portion of the above from the inner surface side and the outer surface side by a pair of pressing rollers, the connecting portion of the strip-shaped member is fitted.

According to the third invention, since the connecting portion of the strip-shaped member is sandwiched and pressed from the inner surface side and the outer surface side, adjacent side edges of the strip-shaped member regardless of the presence or absence of reaction force from the existing pipe or the like. The parts can be reliably connected to each other.

The fourth invention is a strip-shaped member used in the method for producing a pipe body according to the third invention , which is formed so as to extend in the longitudinal direction toward the strip-shaped substrate and the outer surface side of the substrate . a rib of multiple, multiple ribs may include a first rib disposed in the width direction central portion of the substrate and a second rib arranged in the width direction both side edges of the base body, the first rib, to allow a passage through which the outer roller to the pipe producing machine is provided between the substrate and the existing pipe, projecting the front end surface of the first rib is projected on the inner surface side of the existing pipe than the tip surface of the second rib that having a height, a strip-shaped member.

In the fourth invention, the strip-shaped member is used in the method for producing a pipe body according to the third invention. The strip-shaped member includes a strip-shaped substrate. A plurality of ribs extending in the longitudinal direction of the substrate are formed on the outer surface side of the substrate. The plurality of ribs include a first rib arranged at the center portion in the width direction of the substrate and a second rib arranged at both side edges in the width direction of the substrate. The tip surface of the first rib is larger than that of the tip surface of the second rib so that a passage through which the outer roller that presses the outer surface side of the connecting portion of the strip-shaped member passes can be formed between the substrate and the existing pipe. It has a protruding height that protrudes toward the inner surface of the existing pipe.

According to the fourth invention, since the pair of pressing rollers included in the pipe making machine can be easily moved during the pipe making, the side edge portions of the strip-shaped members can be more appropriately connected by the pipe making machine. .. In addition, the existing pipe and the strip-shaped member can be brought into close contact with each other.

The fifth invention is a strip-shaped member used in the method for producing a pipe body according to the third invention , which is a strip-shaped substrate and a plurality of strip-shaped members formed so as to extend in the longitudinal direction on the outer surface side of the substrate. A strip-shaped member which is attached to the outer surface side of the substrate and has a reinforcing member having a height capable of forming a passage through which an outer roller of a pipe making machine is provided between the substrate and an existing pipe. be.

In the fifth invention, the strip-shaped member is used in the method for producing a pipe body according to the third invention. The strip-shaped member includes a strip-shaped substrate. On the outer surface side of the substrate, a plurality of ribs extending in the longitudinal direction of the substrate are formed, and a reinforcing member is attached. The reinforcing member has a height capable of forming a passage through which an outer roller that presses the outer surface side of the connecting portion of the strip-shaped member passes between the base and the existing pipe.

According to the fifth invention, since the pair of pressing rollers included in the pipe making machine can be easily moved during the pipe making, the side edge portions of the strip-shaped members can be more appropriately connected by the pipe making machine. .. In addition, the existing pipe and the strip-shaped member can be brought into close contact with each other.

According to the present invention, since the connecting portion of the strip-shaped member is sandwiched and pressed from the inner surface side and the outer surface side, the adjacent side edge portions of the strip-shaped member are adjacent to each other regardless of the presence or absence of a reaction force from an existing pipe or the like. Can be reliably connected.

The above-mentioned object, other object, feature and advantage of the present invention will become more apparent from the detailed description of the examples described below with reference to the drawings.

It is a schematic diagram which shows the state when the pipe body is formed in the existing pipe by using the pipe making machine which is one Example of this invention. It is a schematic diagram which shows the state which the figure of FIG. 1 was seen from the front of a pipe making machine. It is sectional drawing which shows an example of the strip-shaped member. It is sectional drawing which shows an example of the connection member. It is sectional drawing which shows the state that the side edge portions of the strip-shaped member were connected with each other by the connecting member. It is a schematic diagram which shows the pipe making machine. It is a perspective view which shows the fitting unit provided in the pipe making machine. It is a schematic diagram which shows the fitting unit seen from the front side in the moving direction. It is sectional drawing which shows the cross section of the fitting unit in line IX-IX of FIG. It is a schematic diagram which shows the state when the fitting unit fits the connecting part of a strip-shaped member. It is a schematic diagram which shows the state when the fitting unit fits the connecting part of a strip-shaped member. It is sectional drawing which shows another example of the strip-shaped member. It is a schematic diagram which shows the state when the fitting unit fits the connecting part of a strip-shaped member. It is sectional drawing which shows still another example of a strip-shaped member. It is a schematic diagram which shows the state when the fitting unit fits the connecting part of a strip-shaped member.

With reference to FIGS. 1 and 2, in the pipe making machine 10 according to an embodiment of the present invention, adjacent side edges of the strip-shaped members 12 spirally wound along the inner surface of the existing pipe 100 are connected to each other. To form a tubular body 102 by connecting the above. In this embodiment, the adjacent side edges of the strip-shaped member 12 are connected to each other by using the connecting member 14.

The pipeline rehabilitation method using the pipe making machine 10 according to the present invention can be used for rehabilitation of various existing pipes 100 such as reinforced concrete pipes, synthetic resin pipes and metal pipes, and in particular, in 800 mm-3000 mm. Suitable for rehabilitation of sewer pipes with large diameter.

First, an example of a strip-shaped member (strip) 12 and a connecting member (joiner) 14 which are pipe rehabilitation members constituting the pipe body 102 will be described.

As shown in FIG. 3, the strip-shaped member 12 is a long member that is a main component of the tubular body 102, and includes a strip-shaped substrate 20. The inner surface 20a of the substrate 20 is a surface constituting the inner surface of the tubular body 102, and is a smooth surface. Further, on the outer surface 20b side of the substrate 20, a plurality of ribs 22 that are arranged at predetermined intervals in the width direction and extend in the longitudinal direction are formed. The rib 22 includes a substantially T-shaped first rib 22a and a substantially L-shaped second rib 22b arranged on both side edges of the substrate 20, and is embedded in a filler (backing material) described later. Demonstrate the anchor function.

Further, on both side edges of the substrate 20, a first fitting portion 24 to be fitted with a second fitting portion 32 of the connecting member 14 described later is formed. The first fitting portion 24 is formed in a substantially U shape that opens toward the inner surface 20a side of the substrate 20, and the vertical pieces 24a arranged on the outer side in the width direction are formed on the inner side and the outer side in the width direction. Two protruding locking claws are formed.

The strip-shaped member 12 is integrally molded by, for example, extrusion molding of a synthetic resin such as hard vinyl chloride, and the rib 22 and the first fitting portion 24 are formed over the entire length of the substrate 20 in the longitudinal direction. The width of the strip-shaped member 12 is, for example, 250 mm, and the height thereof is, for example, 17.5 mm.

As shown in FIG. 4, the connecting member 14 is a long member for connecting the side edge portions of the strip-shaped member 12, and includes the strip-shaped substrate 30. The inner surface 30a of the substrate 30 constitutes the inner surface of the tubular body 102 together with the inner surface 20a of the strip-shaped member 12. Further, a second fitting portion 32 to be fitted with the first fitting portion 24 of the strip-shaped member 12 is formed on both side edges of the substrate 30. The second fitting portion 32 includes two ridges 32a protruding from the outer surface 30b of the substrate 30 and extending in the longitudinal direction, and a locking claw is formed at the tip of each ridge 32a. Further, a water blocking material 34 is provided between the two ridges 32a.

Further, in the central portion of the substrate 30, a stretchable portion including a U-shaped groove portion 36 protruding from the outer surface 30b and a wave-shaped flexible portion 38 connecting the outer surfaces 30b to each other so as to cover the entire groove portion 36 is formed. NS. Such an expansion / contraction portion can be expanded / contracted according to the deformation of the groove portion 36, and by breaking (dividing) the groove portion 36 in the width direction, a large expansion / contraction according to the deformation of the flexible portion 38 becomes possible.

The substrate 30, the second fitting portion 32, and the groove portion 36 of the connecting member 14 are integrally molded by, for example, extrusion molding of a synthetic resin such as hard vinyl chloride. Further, the flexible portion 38 is formed of, for example, a polyolefin-based resin such as polyethylene, and is fixed to the substrate 30. The second fitting portion 32, the water blocking material 34, the groove portion 36, and the flexible portion 38 are formed over the entire length of the substrate 30 in the longitudinal direction. The width of the connecting member 14 is, for example, 55 mm.

As shown in FIG. 5, when connecting the side edge portions of the adjacent strip-shaped members 12 using the connecting member 14, the first fitting portion 24 of the strip-shaped member 12 and the connecting member 14 are connected to each other. 2 Fit the fitting portion 32 and the fitting portion 32. Then, each locking claw of the second fitting portion 32 is locked to each locking claw of the first fitting portion 24, and the connecting member 14 is fixed to the strip-shaped member 12 so as not to come off. , The side edges of the strip-shaped member 12 are connected to each other by the connecting member 14.

Next, the configuration of the pipe making machine 10 will be specifically described with reference to FIGS. 6-9. As shown in FIG. 6, the pipe making machine 10 includes a pipe making machine main body 50 formed in a cylindrical shape. A traveling unit 52 having a plurality of wheels 54 is provided below the main body 50 of the pipe making machine. The traveling unit 52 is provided so as to project diagonally downward from both the left and right sides of the pipe making machine main body 50, and the pipe making machine 10 is formed into a pipe body 102 by rotating the wheels 54 by power from a drive source such as a motor (not shown). It runs in the direction of the pipe axis of (existing pipe 100).

Further, the pipe making machine main body 50 is provided with a rotatably shaft 56 that projects forward in the pipe making direction. A rod-shaped first arm 58 extending in the radial direction of the tubular body 102 is fixedly provided at the tip of the shaft 56. A fitting unit 60 is provided at the tip of the first arm 58. Further, a rod-shaped second arm 62 projecting in the direction opposite to that of the first arm 58 is fixedly provided at the tip of the shaft 56. An inscribed roller 64 is provided at the tip of the second arm 62 at a position rearward from the fitting unit 60. The shaft 56 rotates about its axis in response to the power from the drive source, so that the first arm 58 and the second arm 62 rotate in the circumferential direction of the tubular body 102. That is, the pipe making machine 10 spirals the fitting unit 60 and the inscribed roller 64 by rotating the first arm 58 and the second arm 62 in the circumferential direction while moving in the pipe axis direction by the traveling unit 52. It is possible to move to.

As will be described in detail later, the fitting unit 60 presses the connecting portion of the strip-shaped member 12 from both the inner surface side and the outer surface side to press the connecting portion 24 of the strip-shaped member 12 and the connecting member 14. This is a unit for fitting the second fitting portion 32 of the above. On the other hand, the second arm 62 and the inscribed roller 64 are balancers for rotating the first arm 58 and the fitting unit 60 in a well-balanced and stable manner. Further, the inscribed roller 64 also has a function of adjusting the shape of the pipe body 102 by pressing the connecting portion of the formed pipe body 102 from the inner surface side. However, the second arm 62 and the inscribed roller 64 do not necessarily have to be provided.

As shown in FIGS. 7-9, the fitting unit 60 includes a pair of pressing rollers 70, a plurality of guide rollers 72, and a frame 74 that rotatably holds these rollers 70, 72.

The pair of pressing rollers 70 include an inner roller 70a and an outer roller 70b arranged at predetermined intervals (specifically, intervals corresponding to the thickness of the strip-shaped member 12) in the radial direction of the tubular body 102, and the strips. The connecting portion of the shaped member 12 is sandwiched and pressed from the inner surface side and the outer surface side. That is, the pair of pressing rollers 70 press the connecting portion of the strip-shaped member 12 including the adjacent side edge portions of the strip-shaped member 12 and the connecting member 14 from both the inner surface side and the outer surface side. It is a fitting roller that fits the first fitting portion 24 of the plate-shaped member 12 and the second fitting portion 32 of the connecting member 14. The axial length of each pressing roller 70 is set to be substantially the same as the width of the connecting member 14, and is, for example, 55 mm. Further, the outer roller 70b that presses the outer surface side of the connecting portion of the strip-shaped member 12 is arranged at a position where it rolls on the inner surface of the existing pipe 100 when it moves spirally. The guide roller 72 is a guide for smoothly guiding the strip-shaped member 12 and the connecting member 14 between the pair of pressing rollers 70, and the first roller 72a for guiding the connecting member 14 and the strip-shaped member 12 Includes two second rollers 72b, 72c that guide the side edges. The first roller 72a is arranged on the front side in the moving direction with respect to the inner roller 70a, and the two second rollers 72b and 72c are arranged so as to be linearly arranged on the front side in the moving direction with respect to the outer roller 70b. At this time, the distance between the first roller 72a and the second roller 72b facing the first roller 72a is slightly larger than the distance between the pair of pressing rollers 70. The first roller 72a and the second roller 72b lightly fit the first fitting portion 24 of the strip-shaped member 12 and the second fitting portion 32 of the connecting member 14 in front of the pair of pressing rollers 70. It is also a pre-fitting roller. The axial length of each guide roller 72 is set to be substantially the same as the width of the connecting member 14, and is, for example, 55 mm.

The frame 74 includes an inner frame 76, an outer frame 78, and a connecting frame 80 that are integrally formed. The inner frame 76 supports both ends of the shafts of the inner roller 70a and the first roller 72a, and the outer frame 78 supports both ends of the shafts of the outer roller 70b and the second rollers 72b, 72c. Further, the connecting frame 80 is formed in a rectangular plate shape, and connects the ends of the inner frame 76 and the outer frame 78 on the front side in the moving direction. The connecting frame 80 is formed with two notches 82 through which adjacent side edges of the strip-shaped member 12 pass at predetermined intervals. Further, the connecting frame 80 is formed with an opening 84 through which the connecting member 14 passes, inside the notch 82 in the radial direction. The opening 84 has a shape along the outer shape of the connecting member 14, and together with the first roller 72a, functions as a guide for smoothly guiding the connecting member 14 between the pair of pressing rollers 70.

As shown in FIGS. 10 and 11, such a fitting unit 60 spirally moves forward between adjacent side edges of the strip-shaped member 12 in the pipe-making direction, and the strip-shaped member 12 Connect the adjacent side edges of. That is, the first fitting portion 24 of the strip-shaped member 12 and the second fitting portion 32 of the connecting member 14 are fitted together. At this time, the strip-shaped member 12 is guided between the pair of pressing rollers 70 via the second rollers 72b and 72c while adjusting the distance between the side edge portions by passing through the notch 82. On the other hand, the connecting member 14 is positioned by passing through the opening 84 of the frame 74, gradually approaches the strip-shaped member 12 via the first roller 72a, and is guided between the pair of pressing rollers 70. Then, the first fitting portion 24 of the strip-shaped member 12 and the second fitting portion 32 of the connecting member 14 are lightly fitted between the first roller 72a and the second roller 72b, and then paired. It is sandwiched and pressed from the inner surface side and the outer surface side by the pressing roller 70 of the above, so that the fitting is surely fitted.

Subsequently, with reference to FIGS. 1 and 2, an example of a pipe making method of the pipe body 102 using the pipe making machine 10 as described above and a pipeline rehabilitation method of rehabilitating the existing pipe 100 by the pipe body 102. explain.

When rehabilitating the existing pipe 100, first, necessary members and devices such as a strip-shaped member 12, a connecting member 14, a spacer 104, and a pipe making machine 10 are appropriately prepared on the ground near the rehabilitation section of the existing pipe 100. back. The strip-shaped member 12 and the connecting member 14 are individually wound into rolls and installed on the ground at the start position and the end position of the rehabilitation section. Then, after cleaning the inside of the existing pipe 100 using a high pressure washer or the like, the spacer 104 is installed on the inner surface top of the existing pipe 100. The spacer 104 forms a guide passage for introducing a filler injection hose between the existing pipe 100 and the pipe body 102.

Next, the pipe body 102 is constructed in the existing pipe 100 using the pipe making machine 10. Here, first, while pulling the strip-shaped member 12 into the existing pipe 100, the strip-shaped member 12 is spirally wound along the inner surface of the existing pipe 100 to temporarily form the spiral pipe 106. At this time, a gap corresponding to the fitting allowance of the connecting member 14 is provided between the adjacent side edges of the strip-shaped member 12.

Further, while proceeding with this temporary pipe making work, in the spiral pipe 106 that has been temporarily made, the pipe making machine 10 is used to connect the adjacent side edges of the strip-shaped member 12 with the connecting member 14 in order from the start position. I will connect. Specifically, the fitting unit 60 of the pipe making machine 10 is set between the adjacent side edges of the strip-shaped member 12 (the side edge of the strip-shaped member 12 is fitted into the notch 82). The tip of the connecting member 14 drawn into the existing pipe 100 is passed through the opening 84 of the fitting unit 60. Then, in this state, the fitting unit 60 and the inscribed roller 64 are spirally moved by rotating the first arm 58 and the second arm 62 in the circumferential direction while moving the pipe making machine 10 forward. Then, the connecting portion of the strip-shaped member 12 including the adjacent side edges of the strip-shaped member 12 and the connecting member 14 is pressed by the pair of pressing rollers 70 from both the inner surface side and the outer surface side, and the strip plate is pressed. The first fitting portion 24 of the shape member 12 and the second fitting portion 32 of the connecting member 14 are sequentially fitted. That is, the pipe body 102 is sequentially manufactured.

At this time, since the connecting portion of the strip-shaped member 12 is sandwiched and pressed from the inner surface side and the outer surface side by a pair of pressing rollers 70, the existing pipe such as the uneven portion of the existing pipe 100, the connecting portion or both side portions of the spacer 104, etc. Even in a portion where it is difficult to obtain a reaction force from the 100 or the spacer 104, adjacent side edge portions of the strip-shaped member 12 can be reliably connected to each other. Further, the finished size of the pipe body 102 can be made constant. Further, the outer roller 70b rolls on the inner surface of the existing pipe 100, so that the first arm 58 and the pair of pressing rollers 70 (fitting unit 60) can be stably rotated.

When the pipe body 102 was formed in the existing pipe 100, a filler was subsequently injected between the inner surface of the existing pipe 100 and the outer surface of the pipe body 102, and the existing pipe 100 and the pipe body 102 were integrated. Form a rehabilitation tube (composite tube). After that, the rehabilitation work of the existing pipe 100 is completed by appropriately carrying out the tidying up work and the like.

As described above, according to this embodiment, since the pair of pressing rollers 70 that sandwich and press the connecting portion of the strip-shaped member 12 from the inner surface side and the outer surface side are provided, there is a reaction force from the existing pipe 100 or the like. Regardless of the above, the first fitting portion 24 of the strip-shaped member 12 and the second fitting portion 32 of the connecting member 14 can be reliably fitted. Therefore, the adjacent side edges of the strip-shaped member 12 can be reliably connected to each other, and the pipe-making work can be smoothly performed.

The specific configurations or shapes (fitting unit 60, rib 22, fitting portions 24, 32, etc.) of the pipe making machine 10, strip-shaped member 12, connecting member 14, etc. described above are merely examples, and are appropriately used. It can be changed.

For example, a strip-shaped member 12 as shown in FIGS. 12 and 13 can also be used. The strip-shaped member 12 includes a strip-shaped base 20 and a plurality of ribs 22 formed so as to extend in the longitudinal direction on the outer surface 20b side of the base 20. The ribs 22 include a plurality of substantially T-shaped first ribs 22a and substantially L-shaped second ribs 22b arranged on both side edges of the substrate 20. The first rib 22a has a protruding height capable of forming a passage through which the outer roller 70b of the pipe making machine 10 passes between the base 20 and the existing pipe 100. In this embodiment, the tip surface of the first rib 22a protrudes from the tip surface of the second rib 22b toward the inner surface side of the existing pipe 100 by approximately the same size as the outer diameter of the outer roller 70b. The protruding height of the first rib 22a is set.

By using the strip-shaped member 12 as shown in FIG. 12, the pair of pressing rollers 70 (by extension, the fitting unit 60) included in the pipe making machine 10 can be easily moved during the pipe making, so that the pipe making can be performed. It is possible to more appropriately connect the side edges of the strip-shaped member 12 by the machine 10. Further, the existing pipe 100 and the strip-shaped member 12 can be brought into close contact with each other.

Further, for example, a strip-shaped member 12 as shown in FIGS. 14 and 15 can also be used. The strip-shaped member 12 includes a strip-shaped base 20 and a plurality of ribs 22 formed so as to extend in the longitudinal direction on the outer surface 22b side of the base 20. The ribs 22 include a plurality of substantially T-shaped first ribs 22a and substantially L-shaped second ribs 22b arranged on both side edges of the substrate 20. Further, a reinforcing member 90 formed of a highly rigid material is attached to the outer surface 20b side of the substrate 20 over substantially the entire length in the longitudinal direction. The reinforcing member 90 includes a strip-shaped wall portion 90a, and hook-shaped portions 90b projecting toward the substrate 20 side are formed on both side edges of the wall portion 90a. The reinforcing member 90 has a height capable of forming a passage through which the outer roller 70b of the pipe making machine 10 passes between the base 20 and the existing pipe 100. In this embodiment, the wall portion 90a of the reinforcing member 90 projects from the tip surface of the second rib 22b toward the inner surface side of the existing pipe 100 by approximately the same size as the outer diameter of the outer roller 70b. The height of the reinforcing member 90 is set.

In the strip-shaped member 12 shown in FIG. 14, as in the strip-shaped member 12 shown in FIG. 12, the pair of pressing rollers 70 can be easily moved during pipe making, so that the strip-shaped member 12 by the pipe-making machine 10 is used. It is possible to more appropriately connect the side edges of the above. Further, the existing pipe 100 and the strip-shaped member 12 can be brought into close contact with each other.

In the above-described embodiment, the fitting unit 60 includes the guide roller 70, but the guide roller 70 does not necessarily have to be provided, and the number and arrangement of the guide rollers 70 are appropriately changed.

Further, in the above-described embodiment, the connecting member 14 having the telescopic portion is used, but the connecting member 14 does not necessarily have to include the telescopic portion. Further, it is not always necessary to connect the strip-shaped member 12 by using the connecting member 14, and the strip-shaped member 12 can be fitted by being pressed in the thickness direction (that is, the radial direction of the pipe body 102). If there is, the side edge portions of the strip-shaped member 12 can be directly connected to each other. That is, the connecting portion of the strip-shaped member 12 pressed by the pair of pressing rollers 70 may or may not include the connecting member 14.

The specific numerical values such as the dimensions mentioned above are merely examples, and can be changed as appropriate according to the needs of the product specifications and the like.

10 ... Pipe making machine 12 ... Strip plate-shaped member 14 ... Connecting member 20 ... Base 22 ... Rib 50 ... Pipe making machine body 58, 62 ... Arm 60 ... Fitting unit 70 ... Pressing roller 70a ... Inner roller 70b ... Outer roller 90 … Reinforcing member 100… Existing pipe 102… Tube body 104… Spacer

Claims (5)

A pipe making machine that forms a pipe body by connecting adjacent side edges of strip-shaped members spirally wound along the inner surface of an existing pipe using a connecting member.
Tube making machine body,
It is provided with an arm provided on the main body of the pipe making machine and extending in the radial direction and rotating in the circumferential direction of the pipe body to be formed, and a merging unit provided at the tip of the arm.
The combination unit is
A pair of pressing rollers that sandwich and press the connecting portion of the strip-shaped member including the adjacent side edge portions of the strip-shaped member and the connecting member from the inner surface side and the outer surface side.
A frame that holds the pair of pressing rollers, and
A guide roller is provided which is held by the frame on the front side in the rotation direction of the arm with respect to the pair of pressing rollers and guides the adjacent side edges of the strip-shaped member and the connecting member between the pair of pressing rollers. , Pipe making machine. The pipe making machine according to claim 1, wherein the outer roller that presses the outer surface side of the connecting portion of the pair of pressing rollers rolls on the inner surface of the existing pipe. A method for making a pipe body using the pipe making machine according to claim 1 or 2.
(A) A step of spirally winding a strip-shaped member along the inner surface of an existing pipe to temporarily make a pipe, and (B) after the step (A), the strip is provided by a guide roller provided in the pipe making machine. While guiding the adjacent side edges and connecting members of the plate-shaped members between the pair of pressing rollers included in the pipe making machine, the pair of pressing rollers allows the adjacent side edges of the strip-shaped members and the connecting members to be connected to each other. A method for producing a pipe body, which comprises a step of fitting the connecting parts to form a pipe body by sandwiching and pressing the connecting portion of the strip-shaped member including the above from the inner surface side and the outer surface side. A strip-shaped member used in the method for producing a pipe body according to claim 3.
Strip-like base, and provided with multiple ribs formed to extend in the longitudinal direction on the outer surface side of the substrate,
The plurality of ribs include a first rib arranged at the center portion in the width direction of the substrate and a second rib arranged at both side edges in the width direction of the substrate.
Said first rib, as the outer roller capable of forming a passage through which the tip face of the first rib of the second rib tip surface comprising the previous SL-made pipe machine between said existing pipe and said substrate that having a protrusion height protruding on the inner surface of the existing pipe than, strip-shaped member. A strip-shaped member used in the method for producing a pipe body according to claim 3.
Strip-shaped substrate,
A plurality of ribs formed so as to extend in the longitudinal direction on the outer surface side of the substrate, and an outer roller attached to the outer surface side of the substrate and provided by the pipe making machine pass between the substrate and the existing pipe. A strip-shaped member including a reinforcing member having a height capable of forming a passage.

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