Pipe joining construction jig and pipe joining construction method

Abstract

This invention provides a pipe joining jig and pipe joining method that enable efficient joining of multiple pipes in a continuous manner. [Solution] The pipe joining construction jig 10 is a jig used for pipe joining construction in which multiple pipes are joined in a continuous manner. The pipe joining construction jig comprises a first fastening jig 11 for fixing multiple pipes 2 inside, and a second fastening jig 12 for joining a pipe 3, which is arranged in a continuous manner with the fixed multiple pipes 2, to the multiple pipes 2 inside.

Description

Technical Field

[0001] The present invention relates to a pipe joining construction jig and a pipe joining construction method.

Background Art

[0002] As a construction method for joining a plurality of pipes underground, for example, a pipe joining construction method in which a series of steps of sheet piling, excavation, joining, and backfilling is carried out is known. In this pipe joining construction method, a pipe is installed in the sheet piling construction part that has been excavated, and after the pipes are joined, the sheet piling construction part is further extended, and pipes are sequentially installed in the extended sheet piling construction part, thereby continuously joining a plurality of pipes (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the pipe joining construction method of Patent Document 1, for example, since a series of steps of sheet piling, excavation, joining, and backfilling are carried out, depending on the construction setup, it is necessary to fasten the pipes before backfilling. Therefore, in this pipe joining construction method, a jig for joining the pipes inside the pipe becomes an obstacle and the construction becomes difficult. Further, when joining the pipes, in order to arrange the pipes straight, it is necessary to adjust the height while suspending the pipes with a crane or the like. Furthermore, a jig for joining the pipes to be joined is hooked and fixed to the pipe ends, but if a biased force acts on the pipes during joining, there is a risk that the jig will come off from the pipe ends. Therefore, it is difficult to efficiently join a plurality of pipes.

[0005] The present invention has been made in view of the above circumstances, and an object thereof is to provide a pipe joining construction jig and a pipe joining construction method capable of efficiently joining a plurality of pipes continuously. [Means for solving the problem]

[0006] A pipe joining construction jig according to one aspect of the present invention is a pipe joining construction jig used for joining multiple pipes in a continuous manner, and comprises a first fastening jig for fixing at least two pipes internally, and a second fastening jig for joining a pipe that is continuously arranged to the fixed at least two pipes to the at least two pipes internally. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a pipe joining jig and a pipe joining method that enable efficient joining of multiple pipes in a continuous manner. [Brief explanation of the drawing]

[0008] [Figure 1] This is a plan view showing a state in which multiple pipes are connected in a pipe joining construction jig according to an embodiment of the present invention. [Figure 2] Figure 1 is a front view of the pipe joining construction jig as seen from the axial direction. [Figure 3] This is a front view of the first fastening jig provided in the pipe joining construction jig according to the embodiment. [Figure 4] Figure 3 is a top view of the first fastening jig. [Figure 5] Figure 3 is a bottom view of the first fastening jig. [Figure 6] Figure 3 is a side view of the first fastening jig. [Figure 7] This is a side view illustrating an example of joining the first pipe and the second pipe in five pipes using the first fastening jig of the pipe joining construction jig according to the embodiment. [Figure 8] This is a cross-sectional view of the five pipes in Figure 1, broken along line AA, with a portion of the view shown from the side. [Figure 9] This is a front view of the second fastening jig provided in the pipe joining construction jig according to the embodiment. [Figure 10] Figure 9 is a top view of the second fastening jig. [Figure 11] Figure 9 is a bottom view of the second fastening jig. [Figure 12] Figure 9 is a side view of the second fastening jig. [Figure 13] This is a cross-sectional view of several pipes in Figure 1 that have been fractured along the BB line, with a portion of the view shown from the side. [Figure 14] This is a side view of the first fastening jig relating to the first modified example. [Figure 15] This is a front view of the pipe joining construction jig relating to the second modified example. [Figure 16] Figure 15 is a front view of the first fastening jig attached to the pipe joining construction jig. [Modes for carrying out the invention]

[0009] The following describes a pipe joining construction jig and pipe joining construction method according to one embodiment of the present invention, with reference to the drawings.

[0010] As shown in Figure 1, the pipe joining construction jig 10 is used for pipe joining construction to continuously join multiple pipes 1. As an example of a pipe joining construction method using the pipe joining construction jig 10, a method in which the processes of sheet pile laying, excavation, joining, and backfilling are carried out in a series will be described. In this pipe joining construction method, the ground is excavated and pipes are laid at the bottom of the excavated ground. After laying the pipes at the bottom, the excavation of the ground is extended. Pipes are laid at the bottom of the extended excavation. By repeating this process sequentially, multiple pipes 1 are continuously joined underground. Here, the multiple pipes 1 laid continuously at the bottom of the excavation are joined and fixed by the pipe joining construction jig 10 (see Figure 1).

[0011] The multiple pipes 1 are, for example, fiber-reinforced plastic (FRP) pipes with a nominal diameter (inner diameter) of 500 to 2600 mm and a pipe length of 6 m or less. However, the material of pipe 1 is not limited to this. The pipe length of the multiple pipes 1 is preferably 2 to 4 m. In this embodiment, pipes with a pipe length of 2 m are used as the multiple pipes 1. The multiple pipes 1 joined underground are used, for example, as sewer pipes or rainwater drainage pipes.

[0012] The plurality of tubes 1 includes at least two tubes 2 and a tube 3 arranged continuously with at least two tubes 2. At least two tubes 2 are tubes fixed by a first fastening jig 11 described later. In the embodiment, at least two tubes 2 are described as "five tubes 2". Further, among the five tubes 2, the tube laid first from the right in the plane of FIG. 1 is described as the first tube 2A, and the tube laid last is described as the fifth tube 2B. However, the number of tubes 2 is not limited to five, and may be four or less, or six or more. Also, the tube 3 arranged continuously with the five tubes 2 is a tube fixed by a second fastening jig 12 described later. In the embodiment, the tube 3 arranged continuously with the five tubes 2 is described as "four tubes 3". Further, among the four tubes 3, the tube laid first from the right in the plane of FIG. 1 is described as the first tube 3A, and the tube laid last is described as the fourth tube 3B. However, the number of tubes 3 is not limited to four, and may be three or less, or five or more.

[0013] <Pipe joining construction jig> The pipe joining construction jig 10 includes a first fastening jig 11 and a second fastening jig 12. The first fastening jig 11 fixes the five tubes 2 inside. Each of the five tubes 2 has one end as an insertion port and the other end as a receiving port. In the plane of FIG. 1, the right side is the tube end 2ie of the insertion port, and the left side opposite to the tube end 2ie of the insertion port is the tube end 2se of the receiving port. Hereinafter, the tube end 2ie of the insertion port may be referred to as "insertion port tube end 2ie", and the tube end 2se of the receiving port may be referred to as "receiving port tube end 2se".

[0014] The second fastening jig 12 joins the four tubes 3 arranged continuously with the five tubes 2 fixed by the first fastening jig 11 to the fifth tube 2B inside. Each of the four tubes 3 has one end as an insertion port and the other end as a receiving port. In the plane of FIG. 1, the right side is the tube end 3ie of the insertion port, and the left side opposite to the tube end 3ie of the insertion port is the tube end 3se of the receiving port. Hereinafter, the tube end 3se of the receiving port may be referred to as "receiving port tube end 3se".

[0015] <First fastening jig> The first fastening jig 11 includes, for example, a pair of first locking jigs 21 and a pair of first retraction jigs 22. In this embodiment, an example in which the first fastening jig 11 is provided with a pair of first retraction jigs 22 is described, but the first fastening jig 11 may be provided with only one first retraction jig 22. The pair of first locking fixtures 21 are formed symmetrically in the five tubes 2 with respect to the center in the direction of axis O. Therefore, the pair of first locking fixtures 21 are given the same reference numeral, and the first locking fixture 21 on the right side of the page in Figure 1 will be described, while the description of the first locking fixture 21 on the left side of the page will be omitted.

[0016] As shown in Figures 2 to 6, the first locking jig 21 comprises a first beam section 24, a pair of first contact plates 25, and a pair of first reinforcing sections 26. The first beam section 24 comprises, for example, a first beam section body 28 and a pair of first hole structures 29. The first beam section body 28 is formed, for example, as a frame with a roughly rectangular cross-section. The first beam section body 28 is positioned horizontally inside the first pipe 2A of the five pipes 2. Both ends 28a of the first beam section body 28 are located near the inner circumference 2Ai on the side walls of the first pipe 2A. The first hole structures 29 are provided inside both ends 28a of the first beam section body 28 (both ends of the first beam section 24).

[0017] The first hole structure 29 is formed, for example, in a cylindrical shape and is provided facing vertically. The first hole structure 29 has a through hole 29a. Both ends 28a of the first beam body 28 are reinforced by the first hole structure 29. In the vertical direction of the first hole structure 29, the first beam body 28 has a through hole 31 at the top 28b and a through hole 32 at the bottom 28c. A connecting hole 33 is formed by the through hole 31 at the top 28b, the through hole 29a of the first hole structure 29, and the through hole 32 at the bottom 28c. The first retraction jig 22 (see Figure 1), which will be described later, is connected to the connecting hole 33. That is, the first retraction jig 22 is provided at both ends 28a of the first beam body 28. The first retraction jig 22 will be described in detail later.

[0018] A pair of first abutment plates 25 are provided at both ends 28a of the first beam body 28. The pair of first abutment plates 25 are formed symmetrically on the first beam body 28 with respect to the longitudinal center. Therefore, the same reference numeral is used for both the first abutment plates 25, and in Figures 3 to 5, the first abutment plate 25 on the right side of the page will be described, while the description of the first abutment plate 25 on the left side of the page will be omitted.

[0019] The first abutment plate 25 is provided at the end 28a of the first beam body 28, for example, on the outer side wall 28d in the direction of the axis O of the first pipe 2A. The first abutment plate 25 is formed in a generally rectangular wing shape with a first inner edge 25a, a first outer edge 25b, a first upper edge 25c, and a first lower edge 25d. The first inner edge 25a extends above and below the first beam body 28 so as to be perpendicular to the longitudinal direction of the first beam body 28. The first outer edge 25b is positioned outside the end 28a of the first beam body 28. The first outer edge 25b extends above and below the first beam body 28 so as to intersect the longitudinal direction of the first beam body 28 at an angle.

[0020] The first outer edge 25b is positioned radially outward from the outer circumference 2Ao of the first pipe 2A, and radially inward from the inner circumference 5a of the socket 5. Therefore, the first outer edge 25b can abut against the spigot end 2ie of the first pipe 2A. The socket 5 and inner circumference 5a will be explained in detail in Figure 8. The first upper edge 25c and the first lower edge 25d are positioned such that their width in the vertical direction gradually increases from the first inner edge 25a to the first outer edge 25b. That is, the first contact plate 25 is formed wider than the first beam portion 24 in the vertical direction. Therefore, a large area can be secured for the first contact plate 25 to abut against the spigot end 2ie of the first pipe 2A. However, the first upper edge 25c and the first lower edge 25d are not limited to this structure; for example, the first upper edge 25c and the first lower edge 25d may be parallel.

[0021] The first contact plate 25 is visibly colored in the area that contacts the spigot end 2ie of the first pipe 2A along its first outer edge 25b. This makes it easy to confirm that the first contact plate 25 is properly contacting the spigot end 2ie of the first pipe 2A by visually checking the color. In this embodiment, color is used as an example of something that can be visually confirmed, but the things that can be visually confirmed are not limited to color.

[0022] The pair of first reinforcing sections 26 are formed symmetrically on the first beam body 28 with respect to the longitudinal center. Therefore, the pair of first reinforcing sections 26 are given the same reference numeral, and in Figures 3 to 5, the first reinforcing section 26 on the right side of the page will be described, while the description of the first reinforcing section 26 on the left side of the page will be omitted. The first reinforcing section 26 includes, for example, a plurality (three in one embodiment) of upper reinforcing ribs 35, a plurality (two in one embodiment) of lower reinforcing ribs 36, and a reinforcing bar 37. The number of upper reinforcing ribs 35, lower reinforcing ribs 36, and reinforcing bar 37 can be arbitrarily selected.

[0023] Multiple upper reinforcing ribs 35 are provided on the upper side of the first beam body 28, spaced apart in the longitudinal direction of the first beam body 28. The multiple upper reinforcing ribs 35 are formed in a triangular shape, for example, in a side view. The multiple upper reinforcing ribs 35 are connected to the top portion 28b of the first beam body 28 and to the upper part of the first abutment plate 25. Multiple lower reinforcing ribs 36 are provided on the underside of the first beam body 28, spaced apart in the longitudinal direction of the first beam body 28. The multiple lower reinforcing ribs 36 are formed, for example, in a triangular shape when viewed from the side. The multiple lower reinforcing ribs 36 are connected to the bottom 28c of the first beam body 28 and to the lower part of the first abutment plate 25. However, the upper reinforcing rib 35 and the lower reinforcing rib 36 are not limited to being triangular in side view. For example, as shown in the modified example in Figure 14, the upper reinforcing rib 35 may be trapezoidal in side view. In this trapezoidal shape, of the four sides that make up the outer edge of the upper reinforcing rib 35, two are parallel: the side that is in contact with the first abutment plate 25 and the side that is located away from the first abutment plate 25.

[0024] As shown in Figures 2 to 6, the reinforcing bar 37 is positioned on the first contact plate 25 opposite to the multiple upper reinforcing ribs 35 and the multiple lower reinforcing ribs 36. The reinforcing bar 37 is connected along the first upper edge 25c of the first contact plate 25. The first contact plate 25 is firmly fixed to the end portion 28a of the first beam body 28, reinforced by a plurality of upper reinforcing ribs 35, a plurality of lower reinforcing ribs 36, and a reinforcing bar 37.

[0025] As shown in Figures 1 and 3, the pair of first locking fixtures 21 comprises a first locking fixture 21 on the right side of the paper and a first locking fixture 21 on the left side of the paper for each of the five pipes 2. The first locking fixture 21 on the right side of the paper can be locked to the spigot end 2ie of the first pipe 2A for each of the five pipes 2. The spigot end 2ie of the first pipe 2A is located on the left and right sides (outside) opposite the receiving end 2se of the fifth pipe 2B, which is located on the left outer side (outside) of the five pipes 2. Specifically, the first locking fixture 21 on the right side of the paper is locked to the spigot end 2ie in the colored area of ​​the pair of first contact plates 25. In this state, the first beam section 24 is positioned horizontally.

[0026] Furthermore, the first locking jig 21 on the left side of the paper can be locked onto the receiving end 2se of the fifth pipe 2B among the five pipes 2. The receiving end 2se of the fifth pipe 2B is located on the left outer side (outside) of the five pipes 2. Specifically, the first locking jig 21 on the left side of the paper is locked onto the receiving end 2se of the receiving end 2se in the colored area of ​​the pair of first contact plates 25. In this state, the first beam section 24 is positioned horizontally.

[0027] As shown in Figure 7, the first retraction jig 22 is connected to the first beam portion 24 of the first locking jig 21, which is locked to the right outer end of the insertion pipe 2ie, and to the first beam portion 24 of the first locking jig 21, which is locked to the left outer end of the receiving pipe 2se. The first retraction jig 22 comprises, for example, a retraction machine (insertion machine) 41, a first wire 42, a second wire 43, and four shackles (not shown). The retraction machine 41 is a commonly known tool. The retraction machine 41 is configured to allow the first wire 42 and the second wire 43 to be tightened (retracted) by turning a lever 45 by hand. The retraction machine 41 is also configured to allow the first wire 42 and the second wire 43 to be locked in a tightened (retracted) state. The base end of the first wire 42 is connected to one hook of the retraction machine 41, and the base end of the second wire 43 is connected to the other hook of the retraction machine 41.

[0028] A shackle (not shown) is attached to the tip of the first wire 42. A shackle (not shown) is attached to the tip of the second wire 43. The shackles not shown are commonly known tools. The shackle of the first wire 42 is connected to a connecting hole 33 (see Figures 3 and 4) of the first beam section 24 by a first locking jig 21 that is locked to the spigot end 2ie. The shackle of the second wire 43 is connected to a connecting hole 33 (not shown) of the first beam section 24 by a first locking jig 21 that is locked to the socket end 2se.

[0029] As shown in Figures 1 and 7, the first retraction jig 22 is connected to a pair of first locking jigs 21, one locked to the spigot end 2ie and the other locked to the receptacle end 2se. Furthermore, the other first retraction jig 22 is also connected to a pair of first locking jigs 21, one locked to the spigot end 2ie and the other locked to the receptacle end 2se. In this state, the levers 45 of the retraction machines 41 provided on the pair of first retraction jigs 22 are turned by hand to retract and tighten the first wire 42 and the second wire 43. Therefore, the first fastening jig 11 can press the pair of first locking jigs 21 against the spigot end 2ie and the receiving end 2se of the pipe using the pair of first retraction jigs 22. As a result, the first fastening jig 11 can join the five pipes 2 inside.

[0030] As shown in Figure 1, the first fastening jig 11 can sequentially join five pipes 2 one by one inside by, for example, extending the length of the first wire 42 and the second wire 43. Specifically, the five pipes 2 can be joined by performing the joining of the pipes 2 five times using the first fastening jig 11. For example, during the process of performing the five operations, the installer can appropriately replace the first wire 42 and the second wire 43, using wires 42 and 43 of different lengths to ensure proper joining. Furthermore, the first fastening jig 11 can fix the five joined pipes 2 after they have been joined.

[0031] As shown in Figure 2, the first fastening jig 11 is positioned at a height below the axis O of the five pipes 2 in the vertical direction. Preferably, the first fastening jig 11 may be positioned within a range of 1 / 4 of the distance from the half-pipe height to the bottom of the pipe, with the height of the axis O (half-pipe height) as the reference.

[0032] As shown in Figures 1 and 8, the spigot end 2ie of the fifth pipe 2B is fixed to the socket end 2se of the fourth pipe 2 by the first fastening jig 11. The socket 5 is connected to the socket end 2se of the fourth pipe 2. In this embodiment, the socket 5 is not limited to the fourth pipe 2, but is a separate component from the socket end 2se in each pipe 2 (and similarly for each pipe 3), and the inner diameter of the socket 5 is larger than that of the socket end 2se. Here, a spacer 14 is interposed between the fourth pipe 2 and the fifth pipe 2B. Therefore, a space S is secured between the fourth pipe 2 and the fifth pipe 2B. This space S between the fourth pipe 2 and the fifth pipe 2B is used to secure the second fastening jig 12 to the spigot end 2ie of the fifth pipe 2B. Note that the spacer 14 is not limited to being placed between the fourth pipe 2 and the fifth pipe 2B, but can also be placed between the pipes where the second fastening jig 12 is to be placed.

[0033] <Second fastening jig> The second fastening jig 12 connects four pipes 3, which are arranged in a continuous manner with the five pipes 2, to the fifth pipe 2B internally. However, instead of connecting the aforementioned four pipes 3 to the fifth pipe 2B, the second fastening jig 12 may connect them to, for example, the fourth pipe 2, the third pipe 2, the second pipe 2, or the first pipe 2A. Furthermore, instead of the aforementioned four pipes 3, it may connect three or fewer pipes 3, or five or more pipes 3. The second fastening jig 12 includes, for example, a pair of second locking jigs 51 and a pair of second retraction jigs 52. In this embodiment, an example in which the second fastening jig 12 is provided with a pair of second retraction jigs 52 is described, but the second fastening jig 12 may be provided with only one second retraction jig 52. The pair of second locking fixtures 51 are formed symmetrically in the four pipes 3 with respect to the center in the direction of the axis O. Therefore, the pair of second locking fixtures 51 are given the same reference numeral, and in Figures 1 and 8, the second locking fixture 51 on the right side of the page will be described, while the description of the second locking fixture 51 on the left side of the page will be omitted. Note that the axis O of the four pipes 3 is the same as the axis O of the five pipes 2.

[0034] As shown in Figures 2 and 8, the second locking jig 51 is positioned above the first locking jig 21. The second locking jig 51 is configured in a generally similar manner to the first locking jig 21. Specifically, the second locking jig 51 comprises a second beam portion 54, a pair of second contact plates 55, and a pair of second reinforcing portions 56 (see Figure 9).

[0035] As shown in Figures 8 to 12, the second beam section 54 comprises, for example, a second beam section body 58 and a pair of second hole structures 59. The second beam section body 58 is formed, for example, as a frame with a roughly rectangular cross-section. The second beam section body 58 is positioned horizontally inside the fifth pipe 2B of the five pipes 2. Both ends 58a of the second beam section body 58 are located near the inner circumference 2Bi on the side walls of the fifth pipe 2B. Inside both ends 58a of the second beam section body 58 (both ends of the second beam section), the second hole structures 59 are provided.

[0036] The second hole structure 59 is formed, for example, in a cylindrical shape and is provided facing vertically. The second hole structure 59 has a through hole 59a. Both ends 58a of the second beam body 58 are reinforced by the second hole structure 59. Here, the second beam body 58 has a through hole 61 at the top 58b and a through hole 62 at the bottom 58c in the vertical direction. A connecting hole 63 is formed by the through hole 61 at the top 58b, the through hole 59a of the second hole structure 59, and the through hole 62 at the bottom 58c. The second retraction jig 52, which will be described later, is connected to the connecting hole 63. That is, the second retraction jig 52 is provided at both ends 58a of the second beam body 58. The second retraction jig 52 will be described in detail later.

[0037] A pair of second abutment plates 55 are provided at both ends 58a of the second beam body 58. The pair of second abutment plates 55 are formed symmetrically on the second beam body 58 with respect to the longitudinal center. Therefore, the same reference numeral is used for both the second abutment plates 55, and in Figures 9 to 11, the second abutment plate 55 on the right side of the page will be described, while the description of the second abutment plate 55 on the left side of the page will be omitted.

[0038] The second abutment plate 55 is provided at the end 28a of the first beam body 28, for example, on the outer side wall 58d in the direction of the axis O of the fifth pipe 2B. The second abutment plate 55 has a wing-like shape formed by a second inner edge 55a, a second outer edge 55b, a second upper edge 55c, a second lower edge 55d, and a notch 55e. The second inner edge 55a extends over the second beam body 58 so as to be perpendicular to the longitudinal direction of the second beam body 58. The second outer edge 55b is positioned outside the end 58a of the second beam body 58. The second outer edge 55b extends above and below the second beam body 58 so as to be oblique to the longitudinal direction of the second beam body 58.

[0039] The second outer edge 55b is positioned radially outward from the outer circumference 2Bo of the fifth pipe 2B, and radially inward from the inner circumference 5a of the socket 5 (see Figure 2). Therefore, the second outer edge 55b can abut against the spigot end 2ie of the fifth pipe 2B. The second upper edge 55c extends upward from the upper end of the second inner edge 55a to the upper end of the second outer edge 55b. The second lower edge 55d extends from the lower end of the recess 55e to the lower end of the second outer edge 55b. The second contact plate 55 is formed wider than the second beam portion 54 in the vertical direction. Therefore, a large area can be secured for the second contact plate 55 to abut against the spigot end 2ie of the fifth pipe 2B. Here, a notch 55e is provided between the second inner edge 55a and the second lower edge 55d. The notch 55e is located closer to the second inner edge 55a and on the lower side of the second contact plate 55. The reason for providing the notch 55e in the second contact plate 55 will be explained in detail later.

[0040] The second contact plate 55 is visibly colored in the area that contacts the spigot end 2ie of the fifth pipe 2B along its second outer edge 55b. This makes it easy to visually confirm that the second contact plate 55 is properly contacting the spigot end 2ie of the fifth pipe 2B by visually checking the color. In this embodiment, color is used as an example of something that can be visually confirmed, but the things that can be visually confirmed are not limited to color.

[0041] The pair of second reinforcing sections 56 are formed symmetrically on the first beam body 28 with respect to the longitudinal center. Therefore, the pair of second reinforcing sections 56 are given the same reference numeral, and the second reinforcing section 56 on the right side of the page in Figures 9 to 11 will be described, while the description of the second reinforcing section 56 on the left side of the page will be omitted. The second reinforcing section 56 includes, for example, a plurality (three in one embodiment) of upper reinforcing ribs 65, a plurality (two in one embodiment) of lower reinforcing ribs 66, and a reinforcing bar 67. The number of upper reinforcing ribs 65, lower reinforcing ribs 66, and reinforcing bar 67 can be arbitrarily selected.

[0042] Multiple upper reinforcing ribs 65 are provided on the upper side of the second beam body 58, spaced apart in the longitudinal direction of the second beam body 58. The multiple upper reinforcing ribs 65 are formed in a triangular shape, for example, in a side view. The multiple upper reinforcing ribs 65 are connected to the top 58b of the second beam body 58 and to the upper part of the second abutment plate 55. Multiple lower reinforcing ribs 66 are provided on the underside of the second beam body 58, spaced apart in the longitudinal direction of the second beam body 58. The multiple lower reinforcing ribs 66 are formed, for example, in a triangular shape when viewed from the side. The multiple lower reinforcing ribs 66 are connected to the bottom 58c of the second beam body 58 and to the lower part of the second abutment plate 55.

[0043] The reinforcing bar 67 is positioned on the second contact plate 55 opposite to the multiple upper reinforcing ribs 65 and the multiple lower reinforcing ribs 66. The reinforcing bar 67 is connected along the second upper edge 55c of the second contact plate 55. The second contact plate 55 is firmly fixed to the end portion 58a of the second beam body 58, reinforced by a plurality of upper reinforcing ribs 35, a plurality of lower reinforcing ribs 36, and a reinforcing bar 37.

[0044] As shown in Figures 1, 8, and 9, the pair of second locking fixtures 51 comprises a second locking fixture 51 on the right side of the paper and a second locking fixture 51 on the left side of the paper. The second locking fixture 51 on the right side of the paper can be locked to the spigot end 2ie of the fifth pipe 2B among the five pipes 2 fixed by the first fastening fixture 11. The spigot end 2ie of the fifth pipe 2B is the pipe end on the side of the four pipes 3 that are arranged in a continuous line. Here, a space S is secured between the fourth pipe 2 and the fifth pipe 2B by a spacer 14 in the five pipes 2. This space S between the fourth pipe 2 and the fifth pipe 2B is used to lock the second fastening jig 12 onto the spigot end 2ie of the fifth pipe 2B. Specifically, the second locking jig 51 on the right side of the paper is locked onto the spigot end 2ie at the colored area of ​​the pair of second contact plates 55. In this state, the second beam section 54 is positioned horizontally.

[0045] Furthermore, the second locking jig 51 on the left side of the paper can be locked onto the receiving end 3se of the fourth pipe 3B among the four pipes 3. The receiving end 3se of the fourth pipe 3B is the pipe end of the fourth pipe 3B among the four pipes 3 arranged in a continuous sequence with the five pipes 2. Specifically, the second locking jig 51 on the left side of the paper is locked onto the receiving end 3se of the receiving end 3se in the colored area of ​​the pair of first contact plates 25. In this state, the second beam section 54 is positioned horizontally.

[0046] As shown in Figure 1, the second pull-in jig 52 is connected to the second beam portion 54 of the second locking jig 51, which is locked to the inlet end 2ie of the fifth pipe 2B, and to the second beam portion 54 of the second locking jig 51, which is locked to the receiving end 3se of the fourth pipe 3B. The second retraction jig 52, like the first retraction jig 22, includes, for example, a retraction machine (insertion machine) 71, a first wire 72, a second wire 73, and four shackles (not shown). The retraction machine 41 has the same configuration as the retraction machine 41 of the first retraction jig 22. That is, the retraction machine 41 is configured so that the first wire 72 and the second wire 73 can be tightened (retracted) by turning a lever 75 by hand. The retraction machine 71 is also configured so that the first wire 72 and the second wire 73 can be locked in a tightened (retracted) state. The base end of the first wire 72 is connected to one hook of the retraction machine 41, and the base end of the second wire 73 is connected to the other hook of the retraction machine 41.

[0047] A shackle (not shown) is attached to the tip of the first wire 72. A shackle (not shown) is attached to the tip of the second wire 73. The shackles not shown are commonly known tools. The shackle of the first wire 72 is connected to the connecting hole 63 of the second beam section 54 by a second locking jig 51 that is locked to the spigot end 2ie. The shackle of the second wire 73 is connected to the connecting hole 63 (not shown) of the second beam section 54 by a second locking jig 51 that is locked to the socket end 3se.

[0048] As a result, the second retraction jig 52 is connected to a pair of first locking jigs 21, which consist of a second locking jig 51 locked to the spigot end 2ie and a second locking jig 51 locked to the receptacle end 3se. Furthermore, another second retraction jig 52 is also connected to a pair of second locking jigs 51, which consist of a second locking jig 51 locked to the spigot end 2ie and a second locking jig 51 locked to the receptacle end 3se. In this state, the levers 75 of the retraction machines 71 provided on the pair of second retraction jigs 52 are turned by hand to retract and tighten the first wire 72 and the second wire 73. Therefore, the second fastening jig 12 can press the pair of second locking jigs 51 against the spigot end 2ie and the receiving end 3se of the pipe using the pair of second retraction jigs 52. This makes it possible for the second fastening jig 12 to connect the four pipes 3 to the five pipes 2 in a continuous manner inside.

[0049] The second fastening jig 12 can sequentially join the four pipes 3 one by one inside by, for example, extending the length of the first wire 72 and the second wire 73. Specifically, the four pipes 3 can be joined by performing the joining of the pipes 3 four times using the second fastening jig 12.

[0050] Here, for example, four wires with a length of 5m, four wires with a length of 4m, two wires with a length of 2m, and two wires with a length of 1m are prepared as the first wire 42 and second wire 43 of the first fastening jig 11 and the first wire 72 and second wire 73 of the second fastening jig 12.

[0051] As shown in Figures 2, 8, and 13, the second fastening jig 12 is positioned at a height below the axis O of the four pipes 3 in the vertical direction. Preferably, the second fastening jig 12 may be positioned within a range of 1 / 4 of the distance from the half-pipe height to the bottom of the pipe, with the height of the axis O (half-pipe height) as the reference. The first fastening jig 11 and the second fastening jig 12 are positioned at different heights in the vertical direction. In this embodiment, the first fastening jig 11 is positioned below the second fastening jig 12. More specifically, the first retraction jig 22 (first wire 42, second wire 43) of the first fastening jig 11 is positioned below the second retraction jig 52 (first wire 72, second wire 73) of the second fastening jig 12. However, the first fastening jig 11 may be positioned above the second fastening jig 12, and the first retraction jig 22 (first wire 42, second wire 43) of the first fastening jig 11 may be positioned above the second retraction jig 52 (first wire 72, second wire 73) of the second fastening jig 12.

[0052] Here, the pair of second contact plates 55 of the second fastening jig 12 are provided with notches 55e. Therefore, when the second fastening jig 12 is positioned above the first fastening jig 11, the first wire 42 and second wire 43 of the first fastening jig 11 can be passed through the notches 55e. This prevents the first wire 42 and second wire 43 from interfering with the second contact plates 55. However, the notches 55e are not required. Furthermore, as shown in the modified examples in Figures 15 and 16, the first contact plate 25 of the first fastening jig 11 may also have a notch 25e. The notch 25e is provided between the first inner edge 25a and the first upper edge 25d. The notch 25e is located closer to the first inner edge 25a and on the upper side of the first contact plate 25. The notch 25e has the same effect as the notch 55e. In other words, for example, when the second fastening jig 12 is positioned below the first fastening jig 11, the first wire 72 and the second wire 73 of the second fastening jig 12 can be passed through the notch 25e. This prevents the first wire 72 and the second wire 73 from interfering with the first contact plate 25. Note that in a single pipe joining construction jig 10, only the notch 25e may be provided, only the notch 55e may be provided, or both the notch 25e and the notch 55e may be provided.

[0053] <Pipe joint construction method> Next, a pipe joining construction method for joining multiple pipes using a pipe joining construction jig will be explained based on Figures 1, 7, and 8. The pipe joining construction method includes a first step and a second step. First, as shown in Figures 1 and 7, in the first step, the five pipes 2 are fixed inside with the first fastening jig 11. Specifically, for example, the first pipe 2A of the five pipes 2 is laid at the bottom of the excavated ground. After laying the first pipe 2A at the bottom, the excavation of the ground is extended. The second pipe 2 is laid at the bottom of the extended excavation.

[0054] In this state, the first locking jig 21 is locked to the spigot end 2ie of the first pipe 2A. The first locking jig 21 is locked to the receiving end 3se of the second pipe 2. A pair of first retraction jigs 22 are connected to the first locking jig 21 locked to the spigot end 2ie and the first locking jig 21 locked to the receiving end 3se. The levers 45 of the retraction machines 41 provided on the pair of first retraction jigs 22 are turned by hand to pull in and tighten the first wire 42 and the second wire 43. This joins the first pipe 2A and the second pipe 2.

[0055] The following steps are repeated sequentially to join the five pipes 2 with the first fastening jig 11. With the five pipes 2 joined, the joined pipes 2 are fixed with a pair of first pull-in jigs 22 (i.e., the first fastening jig 11). In this state, a space S (see Figure 8 for both sides) is secured between the fourth pipe 2 and the fifth pipe 2B using a spacer 14.

[0056] Next, as shown in Figures 1, 8, and 13, in the second step, four pipes 3 are joined internally to the five fixed pipes 2 using a second fastening jig 12. Specifically, for example, after fixing the five pipes 2, the excavation of the ground is extended. The first pipe 3A of the four pipes 3 is laid at the bottom of the extended excavation. In this state, the second locking jig 51 is locked to the inlet pipe end 2ie of the fifth pipe 2B using the space S between the fourth pipe 2 and the fifth pipe 2B. The second locking jig 51 is locked to the receiving pipe end 3se of the first pipe 3A.

[0057] A pair of second retraction jigs 52 are connected to the second locking jig 51 that is locked to the spigot end 2ie and the second locking jig 51 that is locked to the receptacle end 3se. The levers 75 of the retraction machines 71 provided on the pair of second retraction jigs 52 are turned by hand to pull in and tighten the first wire 72 and the second wire 73. This joins the first pipe 3A to the fifth pipe 2B. This process is repeated sequentially thereafter to arrange the four pipes 3 in a continuous manner with the five pipes 2, and the arranged four pipes 3 are joined to the fifth pipe 2B with the second fastening jig 12. This completes the first and second steps of the pipe joining construction method, in which multiple pipes 1 are joined in a continuous manner using the pipe joining construction jig 10.

[0058] Here, depending on the site conditions and procedures, it is conceivable that after joining the four pipes 3 to the fifth pipe 2B, multiple pipes may be joined in succession. In this case, first, the four pipes 3 are fixed to the five pipes 2 with the second fastening jig 12. In this state, using a new first fastening jig 11, multiple pipes are sequentially joined to the fourth pipe 3B of the four fixed pipes 3.

[0059] According to the pipe joining construction jig of the embodiment described above, as shown in Figure 1, five pipes 2 are fixed internally with the first fastening jig 11. In this state, four pipes 3 are placed in a continuous manner with the five fixed pipes 2. The placed four pipes 3 are joined internally to the five pipes 2 with the second fastening jig 12. Therefore, when pulling in and joining the four pipes 3 that are placed in a continuous manner, a reaction force against the pulling force can be secured by the five fixed pipes. This allows the five pipes 2 to be fixed internally, and furthermore, the four pipes 3 to be joined internally. Thus, five pipes 2 and four pipes 3 can be joined continuously as multiple pipes 1 and construction can be carried out efficiently.

[0060] Furthermore, the first fastening jig 11 is equipped with a pair of first locking jigs 21. The pair of first locking jigs 21 can be locked to the receiving end 2se of the fifth pipe 2B and the insertion end 2ie of the first pipe 2A in the five pipes 2. Thus, the first fastening jig 11 can be securely locked to the five pipes 2. As a result, the five pipes 2 can be joined internally with the first fastening jig 11, and the joined five pipes 2 can be properly fixed internally with the first fastening jig 11.

[0061] Furthermore, the second fastening jig 12 is equipped with a pair of second locking jigs 51. The pair of second locking jigs 51 can be locked to the receiving end 3se of the fourth pipe 3B of the four pipes 3 arranged in a continuous configuration with the five fixed pipes 2, and to the insertion end 2ie of the fifth pipe 2B of the five pipes 2. Thus, the second fastening jig 12 can be securely locked to the five pipes 2 and the four pipes 3. This allows the four pipes 3 to be properly joined to the five pipes 2 internally using the second fastening jig 12.

[0062] Furthermore, by pulling in the pair of first locking jigs 21 with the first retraction jig 22, they are pressed against the receiving end 2se of the fifth pipe 2B and the insertion end 2ie of the first pipe. This allows the five pipes 2 to be properly fixed with the first fastening jig 11. In addition, by pulling in the pair of second locking jigs 51 with the second retraction jig 52, they are pressed against the receiving end 3se of the fourth pipe 3B and the insertion end 2ie of the fifth pipe 2B. This allows the four pipes 3 to be properly joined to the five pipes 2 with the second fastening jig 12.

[0063] Furthermore, as shown in Figures 2 and 13, the heights of the first fastening jig 11 and the second fastening jig 12 are made different. This suppresses interference between the first fastening jig 11 and the second fastening jig 12. As a result, the five pipes 2 can be fixed inside with the first fastening jig 11, and the four pipes 3 can be joined inside with the second fastening jig 12.

[0064] Furthermore, the first fastening jig 11 is positioned below the axis O of the five pipes 2. This allows the five pipes 2 to be properly pulled in and fixed inside by the first fastening jig 11. Also, the second fastening jig 12 is positioned below the axis O of the four pipes 3. This allows the four pipes 3, which are arranged in a continuous manner with the five fixed pipes 2, to be properly pulled in and joined inside by the second fastening jig 12. As a result, the five pipes 2 and the four pipes 3 can be joined in a straight line.

[0065] In addition, it is preferable that the first fastening jig 11 and the second fastening jig 12 be positioned within a height range of 1 / 4 of the distance from the half-pipe height to the bottom of the pipe, using the half-pipe height as a reference. This allows the five pipes 2 and the four pipes 3 to be joined together even more straight.

[0066] Furthermore, as shown in Figures 1 and 2, the first locking jig 21 is equipped with a pair of first contact plates 25, and the pair of first contact plates 25 can be locked to the receiving end 2se of the fifth pipe 2B and the insertion end 2ie of the first pipe 2A. This allows the pair of first contact plates 25 to be stably locked to the receiving end 2se of the fifth pipe 2B and the insertion end 2ie of the first pipe 2A. Furthermore, the second locking jig 51 is equipped with a pair of second contact plates 55, which can be locked to the receiving end 3se of the fourth pipe 3B and the insertion end 2ie of the fifth pipe 2B. This allows the pair of second contact plates 55 to be stably locked to the receiving end 3se of the fourth pipe 3B and the insertion end 2ie of the fifth pipe 2B.

[0067] According to the pipe joining construction method of the embodiment described above, as shown in Figure 1, in the first step, five pipes 2 are fixed internally. In this state, in the second step, four pipes 3 are placed in a continuous manner with the five fixed pipes 2, and the placed four pipes 3 are joined internally with the five pipes 2. Therefore, when the four pipes 3 placed in a continuous manner are pulled in and joined, a reaction force against the pulling force can be secured by the five fixed pipes 2. This allows for the internal fixing of the five pipes 2 and the joining of the four pipes 3 that are continuous with the five pipes 2. Therefore, the five pipes 2 and the four pipes 3 can be efficiently joined together as multiple pipes 1.

[0068] It should be noted that the technical scope of the present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the invention.

[0069] Furthermore, it is possible to replace the components in this embodiment with well-known components as appropriate, without departing from the spirit of the present invention.

[0070] (Note) The above embodiment can be understood, for example, as follows:

[0071] <1> A pipe joining construction jig according to one aspect of the present invention is a pipe joining construction jig used for joining multiple pipes in a continuous manner, and comprises a first fastening jig for fixing at least two pipes internally, and a second fastening jig for joining a pipe that is continuously arranged to the fixed at least two pipes to the at least two pipes internally.

[0072] According to the pipe joining construction jig, at least two pipes are fixed internally with a first fastening jig. In this state, a pipe is placed in a continuous manner with the at least two fixed pipes, and the placed pipe is joined internally to the at least two pipes with a second fastening jig. Therefore, when the continuously placed pipe is pulled in and joined, a reaction force against the pulling force can be secured by the at least two fixed pipes. This allows at least two pipes to be fixed internally, and furthermore, the continuously placed pipes can be joined internally. Thus, multiple pipes can be joined in a continuous manner and construction can be carried out efficiently.

[0073] <2> the above <1> In the pipe joining construction jig relating to the present invention, the first fastening jig may include a pair of first locking jigs that can be locked to the outer pipe ends of at least two pipes and to the outer pipe ends on the opposite side of the first pipe ends, and the second fastening jig may include a pair of second locking jigs that can be locked to the pipe ends of pipes arranged continuously with the at least two fixed pipes and to the pipe ends of the at least two pipes on the side of the continuously arranged pipe.

[0074] The pipe joining construction jig is equipped with a pair of first locking jigs on the first fastening jig. The pair of first locking jigs can be locked to the outer pipe ends and the outer pipe ends on the opposite side of the pipe ends on at least two pipes. Therefore, the first fastening jig can be securely locked to at least two pipes. This allows at least two pipes to be properly fixed inside with the first fastening jig. Furthermore, the second fastening jig is equipped with a pair of second locking jigs. The pair of second locking jigs can be locked to the pipe ends of pipes arranged in a continuous configuration with at least two fixed pipes, and to the pipe ends of the pipes arranged in a continuous configuration among the at least two pipes. Thus, the second fastening jig can be securely locked to at least two pipes and the pipes arranged in a continuous configuration. This allows the continuously arranged pipes to be properly joined internally to at least two pipes using the second fastening jig.

[0075] <3> the above <2> In the pipe joining construction jig relating to the present invention, the first fastening jig may be connected to the pair of first locking jigs and include a first retraction jig capable of pressing the pair of first locking jigs against the pipe end, and the second fastening jig may be connected to the pair of second locking jigs and include a second retraction jig capable of pressing the pair of second locking jigs against the pipe end.

[0076] According to the pipe joining construction jig, a pair of first locking jigs are pressed against the pipe ends by being pulled in with a first retraction jig. This allows at least two pipes to be properly secured with the first fastening jig. Furthermore, a pair of second locking jigs are pressed against the pipe ends by being pulled in with a second retraction jig. This allows at least two pipes arranged in a continuous line to be properly joined with the second fastening jig.

[0077] <4> the above <1> from <3> In a pipe joining construction jig relating to any one of the above, the first fastening jig and the second fastening jig may be positioned at different heights in the vertical direction.

[0078] In the pipe joining construction jig, the heights of the first fastening jig and the second fastening jig are made different. Therefore, interference between the first fastening jig and the second fastening jig can be suppressed. As a result, at least two pipes can be fixed inside with the first fastening jig, and pipes arranged in a continuous line can be joined inside with the second fastening jig 12.

[0079] <5> the above <1> from <3> In a pipe joining construction jig relating to any one of the above, the first fastening jig and the second fastening jig may be positioned below the axis of the pipe.

[0080] In the pipe joining construction jig, the first fastening jig is positioned below the axis of the pipe. Therefore, at least two pipes can be properly pulled in and fixed inside with the first fastening jig. Furthermore, the second fastening jig is positioned below the axis of the pipe. Therefore, a pipe placed continuously with at least two fixed pipes can be properly pulled in and joined inside with the second fastening jig. As a result, at least two pipes and pipes placed continuously with at least two pipes can be joined in a straight line.

[0081] <6> the above <2> or <3> In the pipe joining construction jig relating to the present invention, the first locking jig may comprise a horizontally arranged first beam portion and a pair of first contact plates provided at both ends of the first beam portion so as to be able to lock onto the pipe ends and formed to be wider than the first beam portion, while the second locking jig may comprise a horizontally arranged second beam portion and a pair of second contact plates provided at both ends of the second beam portion so as to be able to lock onto the pipe ends and formed to be wider than the second beam portion.

[0082] The pipe joining construction jig includes a pair of first contact plates in the first locking jig, which can be locked to the pipe end. This allows the pair of first contact plates to be stably locked to the pipe end. The second locking jig also includes a pair of second contact plates, which can be locked to the pipe end. This allows the pair of second contact plates to be stably locked to the pipe end.

[0083] <7> A pipe joining construction method according to one aspect of the present invention is described above. <1> A pipe joining construction method for joining multiple pipes in a continuous manner using the pipe joining construction jig described above, comprising: a first step of fixing at least two pipes internally; and a second step of arranging a pipe in a continuous manner with the at least two fixed pipes and joining the arranged pipe to the at least two pipes internally.

[0084] According to the pipe joining construction method, in the first step, at least two pipes are fixed internally. In this state, in the second step, a pipe is placed in a continuous manner with the at least two fixed pipes, and the placed pipe is joined internally to the at least two pipes. Therefore, when the continuously placed pipe is pulled in and joined, the at least two fixed pipes can provide a reaction force against the pulling force. This allows the fixing of at least two pipes and the joining of a pipe in a continuous manner with at least two pipes to be carried out internally. Thus, multiple pipes can be joined in a continuous manner efficiently. [Explanation of Symbols]

[0085] 1…Multiple tubes 2…Five tubes (at least two tubes) 2A...First tube 2ie…The inlet end of the first pipe (the pipe end located on the outside on the opposite side) 2B...5th tube 2ie...The tubing end of the fifth pipe (the end of a pipe in a series of consecutively arranged pipes) 2se... The receiving end of the fifth pipe (the pipe end located on the outside) 3...4 pipes (pipes arranged in a sequence) 3B...the fourth tube 3se... The receiving end of the fourth pipe (the end of a series of pipes). 10... Pipe joining construction jig 11…First fastening jig 12…Second fastening jig 22...First retraction jig 24…First beam part 25...1st contact plate 28…Main body of the first beam section 28a...Both ends of the first beam section (both ends of the first beam section) 52...Second retraction jig 54…Second beam part 55…Second contact plate 58...Main body of the second beam section 58a...Both ends of the second beam section (both ends of the second beam section)

Claims

1. A pipe joining jig used in pipe joining construction to connect multiple pipes in a continuous manner, A first fastening jig for fixing at least two pipes internally, The device comprises a second fastening jig for joining a pipe, which is arranged in continuous with the two fixed pipes, to the two pipes internally. The first fastening jig is, A pair of first locking jigs that can be locked to the outer end of at least two of the pipes and to the outer end of the pipe on the opposite side of the aforementioned end, A first retraction jig is connected to the pair of first locking jigs and brings the pair of first locking jigs closer together, Equipped with, The second fastening jig is, The system comprises a pair of second locking jigs that can be locked to the pipe ends of pipes arranged in a continuous manner with the at least two fixed pipes, and to the pipe ends of the at least two pipes on the side of the pipe that is arranged in a continuous manner. The second locking jig is, The second beam section is positioned horizontally, The second beam portion comprises a pair of second contact plates, which are provided at both ends of the second beam portion so as to be able to lock onto the pipe ends and are formed to be wider than the second beam portion, A pipe joining construction jig, wherein the second contact plate has a notch formed therein for passing the first wire provided by the first pull-in jig.

2. The first fastening jig is, The first retraction jig is connected to the pair of first locking jigs and is capable of pressing the pair of first locking jigs against the pipe ends, The second fastening jig is, The pipe joining construction jig according to claim 1, further comprising a second retraction jig connected to the pair of second locking jigs and capable of pressing the pair of second locking jigs against the pipe ends.

3. The pipe joining construction jig according to claim 1 or 2, wherein the first fastening jig and the second fastening jig are arranged at positions with different heights in the vertical direction.

4. The pipe joining construction jig according to claim 1 or 2, wherein the first fastening jig and the second fastening jig are positioned below the axis of the pipe.

5. The first locking jig is The first beam section is arranged horizontally, The pipe joining construction jig according to claim 1 or 2, comprising: a pair of first contact plates provided at both ends of the first beam portion so as to be able to lock onto the pipe ends, and formed to be wider than the first beam portion.

6. A pipe joining jig used in pipe joining construction to connect multiple pipes in a continuous manner, A first fastening jig for fixing at least two pipes internally, The device comprises a second fastening jig for joining a pipe, which is arranged in continuous with the two fixed pipes, to the two pipes internally. The first fastening jig comprises a pair of first locking jigs that can be locked to the outer end of at least two pipes and to the outer end of the pipe opposite to the pipe end, The first locking jig is, The first beam section is arranged horizontally, A pair of first contact plates are provided at both ends of the first beam portion so as to be able to lock onto the pipe ends, and are formed to be wider than the first beam portion, The first beam section and the first contact plate are connected by reinforcing ribs, Equipped with, The aforementioned reinforcing rib is formed in a triangular shape when viewed from the side, in a pipe joining construction jig.

7. A pipe joining construction method for joining multiple pipes in a continuous manner using a pipe joining construction jig described in claim 1 or 6, A first step of fixing the at least two tubes inside, A pipe joining construction method comprising: a second step of arranging a pipe in continuous with the at least two fixed pipes, and joining the arranged pipe to the at least two pipes internally.

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