Corrugated rigid synthetic resin pipe opening watertight structure, or a high-performance pipe opening watertight device used therein, or a corrugated rigid synthetic resin pipe opening watertight construction method using the same.

Abstract

The present invention provides a corrugated rigid synthetic resin pipe opening water-sealing structure and method that allows for easy installation of a high-performance pipe opening water-sealing device inside a corrugated rigid synthetic resin pipe, while also ensuring sufficient water sealing at the pipe opening of the corrugated rigid synthetic resin pipe. [Solution] In the high-performance pipe opening water-sealing device, a pipe shaping member 19 is applied to the inner surface recess of the corrugated rigid synthetic resin pipe on the inner surface of the pipe opening 4 of the corrugated rigid synthetic resin pipe 2, and the surface of the inner surface recess of the corrugated rigid synthetic resin pipe is shaped into a substantially flat surface. By inserting the high-performance pipe opening water-sealing device into the flattened corrugated rigid synthetic resin pipe 2, the high-performance pipe opening water-sealing device can be easily installed inside the pipe opening 4 of the corrugated rigid synthetic resin pipe 2, and even if the corrugated rigid synthetic resin pipe 2 has an inner surface recess formed thereon, a sufficient water-sealing effect can be obtained at the pipe opening 4 of the corrugated rigid synthetic resin pipe 2.

Description

Technical Field

[0001] The present invention relates to a wave-shaped rigid synthetic resin pipe joint water stop structure for stopping water at the pipe joint of a wave-shaped rigid synthetic resin pipeline, a high-functional pipe joint water stop device used therefor, or a wave-shaped rigid synthetic resin pipe joint water stop method using the same.

Background Art

[0002] Conventionally, a high-functional pipe joint water stop method for stopping water at the pipe joint of an electric wire pipeline is known, but there is currently no wave-shaped rigid synthetic resin pipe joint water stop method for stopping water at the pipe joint of a wave-shaped rigid synthetic resin pipeline. As a method related to this wave-shaped rigid synthetic resin pipe joint water stop method, a pipe joint for connecting the ends of pipe bodies having spiral concave and convex stripes is known.

[0003] This conventional pipe joint 101 has a continuous spiral concave and convex stripe 102 composed of a convex portion 102a protruding radially inward and a concave portion 102b forming an outer peripheral portion on a joint body 103. One pipe body 106 having a spiral concave and convex stripe 105 composed of a peak portion 105a and a valley portion 105b and the other pipe body 108 having a spiral concave and convex stripe 107 composed of a peak portion 107a and a valley portion 107b are inserted and connected thereto (see FIGS. 17 and 18). That is, the spiral concave and convex stripe 102 of the pipe joint 101 has the end portion 106a of the pipe body 106 screwed into one side of the end portion 101a of the pipe joint 101, and the end portion 108a of the pipe body 108 screwed into the other side of the end portion 101a of the pipe joint 101. By screwing the screwing amount of the end portion 106a of the pipe body 106 and the screwing amount of the end portion 108a of the pipe body 108 into about half within the pipe joint 101, the pipe body 106 and the pipe body 108 are respectively connected to the pipe joint 101 (for example, Patent Document 1). Here, FIG. 17 is a perspective view before connection of a conventional pipe joint and a pipe body, and FIG. 18 is a cross-sectional view showing a connection state of a pipe body by a conventional pipe joint.

Prior Art Documents

Patent Documents

[0004] [Patent Document 1] Japanese Patent Publication No. 2004-332895 [Overview of the project] [Problems that the invention aims to solve]

[0005] If the conventional connection method of pipe joints 101 is to be applied to the corrugated rigid synthetic resin pipe opening sealing method for sealing the pipe opening of a corrugated rigid synthetic resin pipeline, the outer surface of the high-performance pipe opening sealing device is formed into a spiral groove, and this high-performance pipe opening sealing device with a spiral groove is screwed into the corrugated rigid synthetic resin pipeline. In this way, the conventional connection method of pipe joints 101 can be applied to the corrugated rigid synthetic resin pipe opening sealing method for sealing the pipe opening of a corrugated rigid synthetic resin pipeline. However, if the conventional connection method of pipe joints 101 is used in the corrugated rigid synthetic resin pipe opening sealing method for sealing the pipe opening of a corrugated rigid synthetic resin pipeline, a high-performance pipe opening sealing device with a spiral groove is required, which leads to the problem of increased manufacturing costs for the high-performance pipe opening sealing device with a spiral groove.

[0006] Furthermore, in order to install a high-performance pipe opening water-sealing device with a spiral grooved outer surface onto a corrugated rigid synthetic resin pipe, the high-performance pipe opening water-sealing device with a spiral grooved outer surface must be screwed into the corrugated rigid synthetic resin pipe. However, due to deterioration of the corrugated rigid synthetic resin pipe, it becomes difficult to screw the high-performance pipe opening water-sealing device with a spiral grooved outer surface into the corrugated rigid synthetic resin pipe, resulting in the problem that sufficient water-sealing effect cannot be obtained at the pipe opening of the corrugated rigid synthetic resin pipe.

[0007] The present invention has been made in view of the above problems, and relates to a corrugated rigid synthetic resin pipe opening water sealing structure, a high-performance pipe opening water sealing device used therein, or a corrugated rigid synthetic resin pipe opening water sealing method using the same, which allows for easy installation of a high-performance pipe opening water sealing device inside a corrugated rigid synthetic resin pipe and enables sufficient water sealing at the pipe opening of the corrugated rigid synthetic resin pipe. [Means for solving the problem]

[0008] To solve the above problems and achieve the above objective, the first aspect of the present invention relates to a corrugated rigid synthetic resin pipe opening water-stopping structure for corrugated rigid synthetic resin pipes, comprising: a lower pipe shaping member that is rubbed against the bottom surface of a spirally shaped recess on the inner surface of the corrugated rigid synthetic resin pipe; an upper pipe shaping member that is applied from the upper surface of the lower pipe shaping member up to the top of the spirally shaped recess on the inner surface of the corrugated rigid synthetic resin pipe; and an upper pipe shaping member joining section that connects adjacent upper pipe shaping members applied to the spirally shaped recess on the inner surface of the corrugated rigid synthetic resin pipe, thereby forming a substantially flat surface on the inner surface of the corrugated rigid synthetic resin pipe, and enabling easy and sufficient water-stopping of the pipe opening of the corrugated rigid synthetic resin pipe.

[0009] According to the present invention, after the lower pipe shaping member is rubbed against the bottom surface of the recess on the inner surface of the corrugated rigid synthetic resin pipe, the upper pipe shaping member is applied from the upper surface of the lower pipe shaping member up to the top of the recess on the inner surface of the corrugated rigid synthetic resin pipe. This makes it difficult for the lower pipe shaping member and the upper pipe shaping member to peel off from the recess on the inner surface of the corrugated rigid synthetic resin pipe. Furthermore, adjacent upper pipe shaping members applied to the spirally shaped recess on the inner surface of the corrugated rigid synthetic resin pipe are joined together, and the inner surface of the corrugated rigid synthetic resin pipe is formed to be substantially flat by the joining portion of the upper pipe shaping members. This allows for easy installation of a high-performance pipe opening water-sealing device inside the corrugated rigid synthetic resin pipe, and enables sufficient water sealing of the pipe opening of the corrugated rigid synthetic resin pipe.

[0010] A second aspect of the present invention relates to a corrugated rigid synthetic resin pipe opening watertight structure according to the first aspect, characterized in that the lower pipe shaping member and the upper pipe shaping member are pipe shaping adhesives.

[0011] According to the present invention, since a pipe shaping bond is used as the pipe lower shaping member and the pipe upper shaping member, the pipe lower shaping member and the pipe upper shaping member can be easily applied to the recessed inner surface of the corrugated rigid synthetic resin pipe at the pipe opening of the corrugated rigid synthetic resin pipe, and the surface of the recessed inner surface of the corrugated rigid synthetic resin pipe can be easily shaped into a substantially flat surface.

[0012] A third aspect of the present invention relates to a high-performance pipe opening water sealing device used in a corrugated rigid synthetic resin pipe opening water sealing structure according to the second aspect, comprising: a rubber seal block body disposed within a corrugated rigid synthetic resin pipe, the outer circumference of which is substantially the same diameter as the top of the inner surface protrusion of the corrugated rigid synthetic resin pipe, the outer surface of which is substantially flat, and which has block body bolt insertion holes in the direction of the pipe; and fastening plates provided on the front and rear of the seal block body, which have fastening plate bolt insertion holes in the direction of the pipe, and seal block The seal block has bolt insertion holes in the block body and bolt insertion holes in the clamping plates on the front and rear of the seal block, and when the bolt insertion holes in the block body bolt insertion holes in the seal block and the clamping plates are tightened, the clamping plates on the front and rear of the seal block are tightened, and the seal block is pressed against the corrugated rigid synthetic resin pipeline, thereby providing a sufficient watertight seal at the pipeline opening of the corrugated rigid synthetic resin pipeline.

[0013] According to the present invention, by tightening the fastening bolts, a seal block body with a substantially flat outer surface is pressed against the flattened corrugated rigid synthetic resin pipeline, thereby achieving a nearly complete watertight seal at the pipeline opening of the corrugated rigid synthetic resin pipeline.

[0014] A fourth aspect of the present invention relates to a corrugated rigid synthetic resin pipe opening water sealing method using a high-performance pipe opening water sealing device used in a corrugated rigid synthetic resin pipe opening water sealing structure according to the third aspect, comprising: a pipe interior cleaning step in which the inner surface of the corrugated rigid synthetic resin pipe is cleaned; a pipe recess bottom surface lower shaping member rubbing step in which a pipe lower shaping member is rubbed against the bottom surface of a recess on the inner surface of the corrugated rigid synthetic resin pipe; and a pipe upper surface from the upper surface of the pipe lower shaping member rubbed by the pipe recess bottom surface lower shaping member rubbing step up to the upper part of the recess on the inner surface of the corrugated rigid synthetic resin pipe The process involves a pipe recess upper shaping member application step to which a shaping member is applied, a pipe recess upper shaping member joining step to which adjacent pipe recess upper shaping members applied to spirally shaped recesses on the inner surface of the corrugated rigid synthetic resin pipe are joined together after the pipe recess upper shaping member application step, and the inner surface of the corrugated rigid synthetic resin pipe is shaped to be substantially flat, and a high-performance pipe opening water-stopping device having an outer circumference that is substantially the same diameter as the top of the corrugated rigid synthetic resin pipe inner surface convexity and an outer circumference that is substantially flat, and corrugated hard The process involves inserting a water-stopping device into the pipe opening of a corrugated rigid synthetic resin pipeline, and, with the high-performance pipe opening water-stopping device inserted into the pipe opening of the corrugated rigid synthetic resin pipeline by the water-stopping device insertion process, temporarily tightening the tightening bolts inserted through the block body bolt insertion holes of the seal block body and the tightening plate bolt insertion holes of the tightening plate, and after the pipe upper shaping member applied to the inner surface recess of the corrugated rigid synthetic resin pipeline has hardened, it is inserted through the block body bolt insertion holes of the seal block body and the tightening plate bolt insertion holes of the tightening plate. The high-performance pipeline opening watertightening device includes a tightening bolt step, in which the tightening bolts are tightened, causing the seal block body to be pressed against the corrugated rigid synthetic resin pipeline via a tightening plate. By inserting the high-performance pipeline opening watertightening device into the flattened corrugated rigid synthetic resin pipeline, the device can be easily installed inside the pipeline opening of the corrugated rigid synthetic resin pipeline. Furthermore, by pressing the seal block body against the corrugated rigid synthetic resin pipeline with the tightening bolts, a sufficient watertight sealing effect can be obtained at the pipeline opening of the corrugated rigid synthetic resin pipeline.

[0015] According to the present invention, by connecting adjacent pipe upper shaping members applied to the recesses on the inner surface of the corrugated rigid synthetic resin pipe, which are formed in a spiral shape, the inner surface of the corrugated rigid synthetic resin pipe is formed to be substantially flat. A high-performance pipe opening water-sealing device is then inserted into the flattened corrugated rigid synthetic resin pipe, allowing for easy installation of the high-performance pipe opening water-sealing device inside the pipe opening of the corrugated rigid synthetic resin pipe. Furthermore, even in corrugated rigid synthetic resin pipes where recesses (spiral grooves) are formed on the inner surface, a sufficient water-sealing effect can be obtained at the pipe opening of the corrugated rigid synthetic resin pipe. In addition, by pressing a seal block body, whose outer surface is substantially flattened by tightening bolts, against the flattened corrugated rigid synthetic resin pipe, a nearly complete water-sealing effect can be obtained at the pipe opening of the corrugated rigid synthetic resin pipe.

[0016] A fifth aspect of the present invention relates to a corrugated rigid synthetic resin pipe opening water sealing method using a high-performance pipe opening water sealing device used in a corrugated rigid synthetic resin pipe opening water sealing structure according to the third aspect, wherein the seal block body is provided with a block body cable insertion hole for inserting a cable, the tightening plate is provided with a tightening plate cable insertion hole for inserting a cable, and the method comprises a cable lifting step in which the pipe opening portion of a cable laid in a corrugated rigid synthetic resin pipe is lifted to approximately the center of the pipe opening of the corrugated rigid synthetic resin pipe, and with the cable lifted by the cable lifting step, the corrugated rigid The process involves: a conduit inner surface cleaning process in which the inner surface of the synthetic resin conduit is cleaned; a cable central position support process in which the conduit opening portion of the cable, which has been lifted by the cable lifting process, is supported by cable position support means at approximately the center of the conduit opening of the corrugated rigid synthetic resin conduit; a conduit recess bottom surface lower shaping member rubbing process in which a conduit lower shaping member is rubbed against the bottom surface of the inner surface recess of the corrugated rigid synthetic resin conduit; and a conduit recess upper shaping member coating process in which a conduit upper shaping member is applied from the upper surface of the conduit lower shaping member rubbed in the conduit recess bottom surface lower shaping member rubbing process up to the top of the inner surface recess of the corrugated rigid synthetic resin conduit. After the pipe recess upper shaping member coating process is carried out, the pipe recess upper shaping member joining process is performed in which adjacent pipe recess upper shaping members coated on the spirally shaped corrugated rigid synthetic resin inner surface recesses of the pipe are joined together, and the inner surface of the corrugated rigid synthetic resin pipe is shaped into a substantially flat surface. The cable insertion process is performed in which cables are inserted into the block body cable insertion holes of the seal block body of the high-performance pipe opening watertight device and into the tightening plate cable insertion holes of the tightening plates arranged before and after the seal block body. With the cable inserted through the cable insertion hole and the clamping plate cable insertion hole of the clamping plate, a high-performance pipe opening water-sealing device, whose outer circumference is approximately the same diameter as the top of the inner surface protrusion of the corrugated rigid synthetic resin pipe and whose outer surface is approximately flat, is inserted into the pipe opening of the corrugated rigid synthetic resin pipe in a water-sealing device pipe opening insertion step; with the high-performance pipe opening water-sealing device inserted into the pipe opening of the corrugated rigid synthetic resin pipe in the water-sealing device pipe opening insertion step, the clamping bolts inserted through the block body bolt insertion hole of the seal block body and the clamping plate bolt insertion hole of the clamping plate are temporarily tightened in a clamping bolt temporary tightening step;The high-performance pipeline opening watertightening device includes a tightening bolt tightening step in which, after the pipeline upper shaping member applied to the recessed inner surface of the corrugated rigid synthetic resin pipeline has hardened, the tightening bolts inserted through the bolt insertion holes of the seal block body and the tightening plate bolt insertion holes of the tightening plate are tightened, thereby pressing the seal block body against the corrugated rigid synthetic resin pipeline via the tightening plate. The high-performance pipeline opening watertightening device can be easily installed inside the pipeline opening of the corrugated rigid synthetic resin pipeline by being inserted into the flattened corrugated rigid synthetic resin pipeline, and sufficient watertightness can be obtained at the pipeline opening of the corrugated rigid synthetic resin pipeline by pressing the seal block body against the pipeline with the tightening bolts.

[0017] According to the present invention, first, the lower pipe shaping member is rubbed against the bottom surface of the recess on the inner surface of the corrugated rigid synthetic resin pipe, making it difficult for the lower pipe shaping member to separate from the recess on the inner surface of the corrugated rigid synthetic resin pipe. Furthermore, after the lower pipe shaping member on the bottom surface of the recess on the inner surface of the corrugated rigid synthetic resin pipe is hardened, the upper pipe shaping member is applied from the upper surface of the hardened lower pipe shaping member to the top of the recess on the inner surface of the corrugated rigid synthetic resin pipe. Then, by connecting adjacent upper pipe shaping members applied to the spirally shaped recess on the inner surface of the corrugated rigid synthetic resin pipe, the surface between the recesses on the inner surface of the corrugated rigid synthetic resin pipe can be shaped into a substantially flat surface. As a result, the upper shaping member applied to the recessed inner surface of the corrugated rigid synthetic resin pipeline becomes less likely to come off the recessed inner surface of the corrugated rigid synthetic resin pipeline, and the lower and upper shaping members of the pipeline can be firmly bonded to the recessed inner surface of the corrugated rigid synthetic resin pipeline. [Effects of the Invention]

[0018] As described above, the corrugated rigid synthetic resin pipe opening water-sealing structure of the present invention allows for easy installation of a high-performance pipe opening water-sealing device inside a corrugated rigid synthetic resin pipe, and enables sufficient water sealing of the pipe opening of the corrugated rigid synthetic resin pipe. [Brief explanation of the drawing]

[0019] [Figure 1] It is a schematic diagram showing the installation status of the high-functional pipe joint water stop device in the first embodiment of the present invention. [Figure 2] (a) It is a front view of the pipe joint of the corrugated rigid synthetic resin pipe. (b) It is a side view of the same corrugated rigid synthetic resin pipe. (c) It is a cross-sectional view taken along the line A-A of FIG. 2(a). [Figure 3] It is an exploded perspective view of the high-functional pipe joint water stop device in the first embodiment of the present invention. [Figure 4] (a) It is a side view of the seal block body of the same high-functional pipe joint water stop device. (b) It is a front view of the seal block body of the same high-functional pipe joint water stop device. [Figure 5] (a) It is a side view of the same high-functional pipe joint water stop device. (b) It is a front view of the same high-functional pipe joint water stop device. [Figure 6] It is a perspective view showing the state where the side of the same high-functional pipe joint water stop device is opened. [Figure 7] (a) It is a flowchart of the corrugated rigid synthetic resin pipe joint water stop method using the same high-functional pipe joint water stop device. (b) It is a sub-routine flowchart of the pipeline recess flattening process of the corrugated rigid synthetic resin pipe joint water stop method using the same high-functional pipe joint water stop device. [Figure 8] It is a diagram showing the cable supported by the polyurethane foam board in the cable central position support process of the corrugated rigid synthetic resin pipe joint water stop method using the same high-functional pipe joint water stop device. [Figure 9] (a) It is a diagram showing the state where the pipeline lower part shaping bond is rubbed on the bottom surface of the inner concave part of the corrugated rigid synthetic resin pipe in the pipeline concave part bottom lower shaping member rubbing process of the corrugated rigid synthetic resin pipe joint water stop method using the same high-functional pipe joint water stop device. (b) It is a diagram showing the state where the pipeline upper part shaping bond is applied up to the upper part of the inner concave part of the corrugated rigid synthetic resin pipe in the pipeline concave part upper shaping member coating process of the same corrugated rigid synthetic resin pipe joint water stop method. (c) It is a diagram showing the state where the pipeline shaping bonds applied to the inner concave part of the corrugated rigid synthetic resin pipe are joined together in the pipeline concave part upper shaping member joining process of the same corrugated rigid synthetic resin pipe joint water stop method. [Figure 10]It is a partial cross-sectional view showing the state where the high-functional pipe joint water stop device in the first embodiment of the present invention is attached to a pipeline. [Figure 11] It is a perspective view of the high-functional pipe joint water stop device in the second embodiment of the present invention. [Figure 12] (a) It is a side view of the seal block body of the high-functional pipe joint water stop device. (b) It is a front view of the seal block body of the high-functional pipe joint water stop device. [Figure 13] (a) It is a side view of the front tightening plate of the high-functional pipe joint water stop device. (b) It is a front view of the front tightening plate of the high-functional pipe joint water stop device. (c) It is a rear perspective view of the front tightening plate of the high-functional pipe joint water stop device. [Figure 14] (a) It is a side view of the rear tightening plate of the high-functional pipe joint water stop device. (b) It is a front view of the rear tightening plate of the high-functional pipe joint water stop device. (c) It is a rear perspective view of the rear tightening plate of the high-functional pipe joint water stop device. [Figure 15] (a) It is a flowchart of the wave corrugated rigid synthetic resin pipe joint water stop method using the high-functional pipe joint water stop device. (b) It is a sub-routine flowchart of the pipeline recess flattening process of the wave corrugated rigid synthetic resin pipe joint water stop method using the high-functional pipe joint water stop device. [Figure 16] It is a cross-sectional view showing the state where the high-functional pipe joint water stop device is attached to a pipeline. [Figure 17] It is a perspective view before connection of a conventional pipe joint and a pipe body. [Figure 18] It is a cross-sectional view showing the connection state of a pipe body by the same pipe joint.

Embodiments for Carrying Out the Invention

[0020] Hereinafter, a wave corrugated rigid synthetic resin pipe joint water stop method using the high-functional pipe joint water stop device of the present invention will be described.

[0021] First, the high-performance pipeline opening sealing device 1 used in the corrugated rigid synthetic resin pipeline opening sealing method will be described with reference to the drawings. Here, Figure 1 is a schematic diagram showing the installation of the high-performance pipeline opening sealing device in the first embodiment of the present invention. In this embodiment, the high-performance pipeline opening sealing device 1 attached to a power cable will be used as the high-performance pipeline opening sealing device 1 for explanation, but the high-performance pipeline opening sealing device 1 in this embodiment is used as an example, and other high-performance pipeline opening sealing devices may be used. Also, in this embodiment, a power cable is used, but it is not limited to this, and other cables may be used.

[0022] As shown in Figure 1, the high-performance conduit opening watertight device 1 is used in a corrugated rigid synthetic resin conduit opening watertight structure in which a single-core power cable (electric wire) 3 is laid inside a corrugated rigid synthetic resin conduit 2, and the conduit opening 4 of the corrugated rigid synthetic resin conduit 2 is sealed off. Specifically, manholes 5 are provided at appropriate lengths along the power cable 3 laid inside the corrugated rigid synthetic resin conduit 2 buried underground, and the device prevents water from entering the manhole 5 from the conduit opening 4, which is the opening of the corrugated rigid synthetic resin conduit 2 to the manhole 5. Here, the cable connection part 34 is a component that connects the left and right power cables 3 inside the manhole 5. This corrugated rigid synthetic resin conduit 2 is a flexible resin conduit for underground burial, which is lightweight and hard among resins, and is used to protect the power cable 3 (see Figure 2). The corrugated rigid synthetic resin conduit 2 has a spiral convex-concave shape in which corrugated rigid synthetic resin conduit convex portions 18a protruding radially inward and corrugated rigid synthetic resin conduit concave portions 18b protruding radially outward are formed continuously along the longitudinal direction. The lowest point of one corrugated rigid synthetic resin conduit concave portion 18b and the lowest point of the adjacent corrugated rigid synthetic resin conduit concave portion 18b are separated by approximately 50 mm, and the depth of the corrugated rigid synthetic resin conduit concave portion 18b is approximately 45 mm. In addition, the outer surface of the corrugated rigid synthetic resin conduit 2 is circular in shape, and the insertion direction into the corrugated rigid synthetic resin conduit 2 (direction along the conduit direction) is formed in a wavy shape, similar to the inner surface (see Figures 2(b) and 2(c)). In this way, the insertion direction into the corrugated rigid synthetic resin conduit 2 (direction along the conduit direction) is formed in a wavy shape, which can reduce the coefficient of friction when pulling in power cables. Here, Figure 2(a) is a front view of the conduit opening of the corrugated rigid synthetic resin conduit, Figure 2(b) is a side view of the corrugated rigid synthetic resin conduit, and Figure 2(c) is a cross-sectional view of AA in Figure 2(a). In this embodiment, a high-performance conduit opening water-sealing device 1 for a single-core (one-wire) power cable 3 is used, but the invention is not limited to this, and if a CVT cable (three-wire cable) is used, a high-performance conduit opening water-sealing device compatible with the CVT cable (three-wire cable) may be used.

[0023] Next, the structure of the high-performance pipeline outlet water-stopping device 1 will be described. Here, Figure 3 is an exploded perspective view of the high-performance pipeline outlet water-stopping device in the first embodiment of the present invention, Figure 4(a) is a side view of the seal block body of the high-performance pipeline outlet water-stopping device, Figure 4(b) is a front view of the seal block body of the high-performance pipeline outlet water-stopping device, Figure 5(a) is a side view of the high-performance pipeline outlet water-stopping device, and Figure 5(b) is a front view of the high-performance pipeline outlet water-stopping device.

[0024] As shown in Figure 3, the high-performance pipeline opening watertight device 1 comprises a seal block body 6, a clamping plate 7 (front clamping plate 7a, rear clamping plate 7b), a clamping bolt 8a, and a nut 8b. The seal block body 6 is provided with a block body cable insertion hole 10 through which a single-core power cable 3 is inserted, and the clamping plate 7 (front clamping plate 7a, rear clamping plate 7b) is also provided with a clamping plate cable insertion hole 12 through which the power cable 3 is inserted, similar to the seal block body 6. The specific details will be described later. Here, the clamping plate 7 will be described with the front clamping plate 7a and the rear clamping plate 7b attached from the back side of the corrugated rigid synthetic resin pipeline 2 toward the pipeline opening 4.

[0025] The seal block 6 is made of ethylene propylene rubber and is placed inside the corrugated rigid synthetic resin conduit 2. Its outer circumference is approximately the same diameter as the top of the corrugated rigid synthetic resin conduit inner surface protrusion 18a on the inner surface of the corrugated rigid synthetic resin conduit 2, and its outer surface is formed to be approximately flat. It is provided with a block body cable insertion hole 10 for inserting a power cable 3 in the direction of the conduit and a block body bolt insertion hole 11 for inserting a tightening bolt 8a (see Figures 3 and 4). In this embodiment, the hollow hole in the seal block 6 is named "block body cable insertion hole 10," but in the second embodiment, the power cable 3 is not inserted and a tightening bolt 8a is inserted, so it is named "block body bolt insertion hole 20a." Here, the corrugated rigid synthetic resin conduit inner surface protrusion 18a refers to the peaks on the inner surface of the corrugated rigid synthetic resin conduit 2. The seal block body 6 has one cut point extending from the outer circumference towards the center, and as will be described later, the power cable 3 is inserted into the block body cable insertion hole 10 from this cut point. Here, the seal block body 6 is described as having a cylindrical shape with a substantially flat outer surface, and its outer circumference is formed to be substantially the same diameter as the top of the corrugated rigid synthetic resin conduit inner surface protrusion 18a on the inner surface of the conduit opening 4 of the corrugated rigid synthetic resin conduit 2. However, since the outer circumference of the seal block body 6 is the same as the outer circumference of the high-performance conduit opening water-sealing device 1, it can also be said that it is formed to be substantially the same diameter as the outer diameter of the high-performance conduit opening water-sealing device 1. In this embodiment, the seal block body 6 has one cut point extending from the outer circumference towards the center, but it may have two or more cut points (for example, three) extending from the outer circumference towards the center. If the seal block body 6 has two or more cut points (for example, three) extending from the outer circumference towards the center, the seal block body 6 is divided at the cut points, and the divided seal block body 6 is constructed by combining these divided seal block body parts. Furthermore, in this embodiment, the corrugated rigid synthetic resin pipe 2 is placed with one cut point, but it is not limited to this, and the corrugated rigid synthetic resin pipe 2 may be placed with multiple cut points (for example, an odd number of cut points such as 3, 5, or 7, or an even number of cut points such as 2, 4, or 6).Furthermore, in this embodiment, the material of the seal block 6 is ethylene propylene rubber, but it is not limited to this, and other types of rubber may be used as the material, or even an elastic material containing rubber may be used.

[0026] The seal block body 6 is formed with a rubber hardness of approximately 30 degrees, and the block body bolt insertion holes 11 of the seal block body 6 are arranged at equal intervals in the circumferential direction of the seal block body 6 and are formed in a circular shape with a cross-sectional shape slightly larger than that of the fastening bolt 8a (see Figure 4(b)). In this embodiment, the block body bolt insertion holes 11 are arranged at equal intervals in the circumferential direction of the seal block body 6, but this is not limited to this, and they do not necessarily have to be at equal intervals in the circumferential direction of the seal block body 6. Also, in this embodiment, the rubber hardness of the seal block body 6 is approximately 30 degrees, but this is not limited to this, and the rubber hardness of the seal block body 6 may be other rubber hardnesses such as 20 degrees to 45 degrees (preferably 25 degrees to 40 degrees (more preferably 25 degrees to 35 degrees)).

[0027] The clamping plate 7 is provided at the front and rear of the seal block body 6, and is provided with a clamping plate cable insertion hole 12 for inserting the power cable 3 in the conduit direction and a clamping plate bolt insertion hole 13 for inserting the clamping bolt 8a (see Figure 3). In this embodiment, the hollow hole for the clamping bolt 8a is named "clamping plate cable insertion hole 12," but in the second embodiment, the power cable 3 is not inserted and the clamping bolt 8a is inserted, so it is named "clamping plate bolt insertion hole 22." The clamping plate 7 consists of a front clamping plate 7a and a rear clamping plate 7b, and is made of MC nylon (registered trademark) or stainless steel, which is polymerized and molded (cast) nylon monomer under atmospheric pressure, and is formed in a cylindrical shape. The clamping plate 7 is also cut at two points in the insertion direction, and the clamping plate 7 is constructed by combining the divided clamping plates (see Figure 5(b)). Then, as will be described later, the power cable 3 is inserted into the clamping plate cable insertion hole 12 from the cut point. Also, when assembling the corrugated rigid synthetic resin conduit 2, the corrugated rigid synthetic resin conduit 2 is assembled by shifting the cut point (1 location) of the seal block body 6 one notch clockwise from the cut point of the clamping plate 7. Here, there are three clamping plate bolt insertion holes 13 in each divided clamping plate, but the number of clamping plate bolt insertion holes 13 is not limited as long as there are two or more clamping plate bolt insertion holes 13 in each divided clamping plate. In this embodiment, the clamping plate 7 is cut in two places in the insertion direction and divided into two in the insertion direction, but the number of divisions is not limited as long as the clamping plate 7 is divided into two or more (for example, four) in the insertion direction.

[0028] The bolt insertion holes 13 of the clamping plate 7 are arranged at equal intervals in the circumferential direction of the clamping plate 7 and are formed in a circular shape with a cross-sectional shape slightly larger than that of the clamping bolts 8a (see Figure 5(b)). In this embodiment, the bolt insertion holes 13 of the clamping plate 7 are formed at equal intervals in the circumferential direction of the clamping plate 7, but this is not limited to this, and they do not have to be at equal intervals in the circumferential direction of the clamping plate 7.

[0029] The high-performance pipeline opening watertight device 1 involves inserting power cables 3 through the cable insertion holes 12 of the rear clamping plate 7b, the cable insertion holes 10 of the seal block body 6, and the cable insertion holes 12 of the front clamping plate 7a. Then, tightening bolts 8a are inserted into the bolt insertion holes 11 of the seal block body 6 and the bolt insertion holes 13 of the clamping plate 7, respectively. The inserted tightening bolts 8a are then screwed onto nuts 8b, thereby tightening the seal block body 6 by the clamping plate 7 (see Figure 3). As a result, the seal block body 6 expands radially due to the tightening of the clamping plate 7, and is strongly pressed against the inner surface of the corrugated rigid synthetic resin pipeline 2 (see Figure 10). In this way, the watertight effect of the seal block body 6 can be improved by strongly pressing the seal block body 6 against the inner surface of the corrugated rigid synthetic resin pipeline 2. Furthermore, the tightening bolts 8a are inserted into the block body bolt insertion holes 11 of the seal block body 6 and the tightening plate bolt insertion holes 13 of the tightening plate 7, respectively. The inserted tightening bolts 8a are then screwed onto the nuts 8b, thereby tightening the tightening plate 7 and the seal block body 6 with the tightening bolts 8a. In this embodiment, the tightening bolts 8a, inserted into the bolt insertion holes 11 of the seal block body 6 and the bolt insertion holes 13 of the tightening plate 7, are screwed onto nuts 8b, thereby tightening the tightening plate 7 and the seal block body 6 with the tightening bolts 8a. However, the embodiment is not limited to this, and a screw hole may be engraved on the inner circumferential surface of the bolt insertion hole 13 of the tightening plate 7, and the tightening bolts 8a may be inserted along the screw hole engraved on the inner circumferential surface of the bolt insertion hole 13 of the tightening plate 7 into the bolt insertion holes 11 of the seal block body 6 and the bolt insertion holes 13 of the tightening plate 7, respectively, thereby tightening the tightening plate 7 and the seal block body 6 with the tightening bolts 8a.

[0030] Next, a method for inserting the power cable 3 into the seal block body 6 of the high-performance pipeline opening water-sealing device 1 of the present invention will be described. Here, Figure 6 is a perspective view showing the side of the high-performance pipeline opening water-sealing device in the first embodiment of the present invention with the opening. Here, the explanation will focus on the seal block body 6.

[0031] As shown in Figure 6, in order to insert the power cable 3 into the seal block body 6 of the high-performance pipeline watertight device 1, one nut 8b screwed onto the tightening bolt 8a is removed from the tightening bolt 8a, and the tightening bolt 8a from which the nut 8b has been removed is pulled out from the tightening plate bolt insertion hole 13 of the tightening plate 7 and the block body bolt insertion hole 11 of the seal block body 6, creating an opening where the tightening bolt 8a was pulled out, and the power cable 3 is inserted into the block body cable insertion hole 10 through the opened opening. After inserting the power cable 3, the tightening bolt 8a is then inserted back into the tightening plate bolt insertion hole 13 of the tightening plate 7 and the block body bolt insertion hole 11 of the seal block body 6 from which the tightening bolt 8a was pulled out.

[0032] Next, a corrugated rigid synthetic resin pipeline opening sealing method using the high-performance pipeline opening sealing device 1 of the present invention will be described. Here, Figure 7(a) is a flowchart of the corrugated rigid synthetic resin pipeline opening sealing method using the high-performance pipeline opening sealing device in the first embodiment of the present invention, and Figure 7(b) is a subroutine flowchart of the pipeline recess flattening step in the corrugated rigid synthetic resin pipeline opening sealing method using the same high-performance pipeline opening sealing device. In this embodiment, a power cable 3 is used for explanation, but as mentioned above, it can also be applied to cables other than the power cable 3.

[0033] First, in S1, the cable lifting process is carried out. In this cable lifting process, the conduit opening 4 portion of the power cable 3 laid inside the corrugated rigid synthetic resin conduit 2 is lifted to approximately the center of the conduit opening 4 of the corrugated rigid synthetic resin conduit 2. That is, the conduit opening 4 portion of the power cable 3 laid inside the corrugated rigid synthetic resin conduit 2 is lifted to approximately the center of the conduit opening 4 of the corrugated rigid synthetic resin conduit 2 by being suspended by a nylon sling B (not shown), which is suspended via a lever block (not shown (registered trademark)) on a nylon sling A (not shown) that is hung on a single pipe (not shown) that is stretched horizontally from one wall surface to the other inside the manhole 5 (approximately above the conduit opening 4). Specifically, a single-pipe jack (not shown) is attached to the end of a single pipe (not shown), and the single pipe (not shown) with the single-pipe jack (not shown) attached is installed horizontally from one wall to the other inside the manhole 5 (upper part of the pipe opening 4). A nylon sling A (not shown) is then hung over the single pipe (not shown) installed inside the manhole 5, and the upper hooks (not shown) of a lever block (not shown) are attached to the ring-shaped loops (not shown) at both ends of the nylon sling A (not shown) that is hung over the single pipe (not shown). In other words, the upper hooks (not shown) of the lever block (not shown) are locked and attached to the ring-shaped loops (not shown) at both ends of the nylon sling A (not shown). The ring-shaped loops (not shown) at both ends of a nylon sling B (not shown) are then locked to the lower hook (not shown) of the lever block (not shown), and the nylon sling B is attached to the lower hook (not shown) of the lever block (not shown). With both ends of the nylon sling B (not shown) secured to the lower hook (not shown) of the lever block (not shown), the power cable 3 is inserted into the hollow part of the circular nylon sling B (not shown). Then, with the power cable 3 inserted into the hollow part of the nylon sling B (not shown), the load chain (not shown) of the lever block (not shown) is moved up and down, thereby lifting the power cable 3, which is laid inside the corrugated rigid synthetic resin conduit 2, so that the conduit opening 4 of the corrugated rigid synthetic resin conduit 2 is approximately in the center of the conduit opening 4 of the corrugated rigid synthetic resin conduit 2. Then, the process proceeds to S2.

[0034] In S2, the conduit interior cleaning process is carried out. In this conduit interior cleaning process, with the power cable 3 suspended by the cable lifting process (S1), the inner surface of the corrugated rigid synthetic resin conduit 2 is cleaned. Specifically, the inner surface of the corrugated rigid synthetic resin conduit 2 near the conduit opening 4 is thoroughly cleaned using a cleaning cloth soaked in water. Then, the process proceeds to S3.

[0035] In S3, a cable central position support process is performed. In this cable central position support process, the conduit opening 4 portion of the power cable 3, which was lifted in the cable lifting process (S1), is supported approximately in the center of the conduit opening 4 of the corrugated rigid synthetic resin conduit 2 using a polyurethane foam plate 17. Specifically, the polyurethane foam plate 17 is bent and inserted between the power cable 3 and the circumferential portion of the corrugated rigid synthetic resin conduit 2, thereby centering the power cable 3, i.e., the power cable 3 is supported approximately in the center of the conduit opening 4 of the corrugated rigid synthetic resin conduit 2 using the polyurethane foam plate 17 (see Figure 8). In this embodiment, a polyurethane foam plate 17 is used, but the invention is not limited to this, and other cable position support means may be used. Here, the phrase "approximately the center of the conduit opening 4 of the corrugated rigid synthetic resin conduit 2" is almost synonymous with the central position of the conduit opening 4 of the corrugated rigid synthetic resin conduit 2, and there is no problem as long as the power cable 3 can be positioned so that the conduit recess flattening process (S4) can be carried out. Figure 8 shows a cable supported by a polyurethane foam plate in the cable central position support process of the corrugated rigid synthetic resin conduit opening waterproofing method using the high-performance conduit opening waterproofing device in the first embodiment of the present invention. Then, proceed to S4.

[0036] In S4, a pipe recess flattening process is carried out. In this pipe recess flattening process, pipe shaping bond 19 (pipe lower shaping bond 19a, pipe upper shaping bond 19b) is applied to the inner surface recess 18b of the corrugated rigid synthetic resin pipe on the inner surface of the pipe opening 4 of the corrugated rigid synthetic resin pipe 2, and the surface of the inner surface recess 18b of the corrugated rigid synthetic resin pipe is shaped into a substantially flat surface (see Figure 9). The pipe shaping bond 19 (pipe lower shaping bond 19a, pipe upper shaping bond 19b) applied to the inner surface recess 18b of the corrugated rigid synthetic resin pipe is made by mixing the main agent and the hardener in a 1:1 ratio and kneading until the color is uniform. The pipe recess flattening process will be explained in detail using Figure 7(b). Furthermore, if a large amount of water is present in the corrugated rigid synthetic resin pipeline 2, a polyurethane foam plate 17 is attached to the pipeline side of the corrugated rigid synthetic resin pipeline 2 to which the high-performance pipeline opening water-stopping device 1 is installed, in order to prevent water from flowing into the manhole 5 side, and while temporary water-stopping is performed, the pipeline recess flattening process is carried out. Here, Figure 7(b) is a subroutine flowchart of the pipeline recess flattening process of the corrugated rigid synthetic resin pipeline opening water-stopping method using the high-performance pipeline opening water-stopping device in the first embodiment of the present invention. In this embodiment, pipeline shaping bond 19 (pipeline lower shaping bond 19a, pipeline upper shaping bond 19b) is used, but it is not limited to this, and pipeline shaping members (pipeline lower shaping member, pipeline upper shaping member) other than pipeline shaping bond that can shape the surface of the inner recess 18b of the corrugated rigid synthetic resin pipeline into a substantially flat surface may also be used.

[0037] In S41, a process of applying a lower shaping member to the bottom surface of a pipe recess is carried out. In this process of applying a lower shaping member to the bottom surface of a pipe recess, the pipe lower shaping bond 19a (pipe lower shaping member) is rubbed onto the bottom surface of the inner recess 18b of the corrugated rigid synthetic resin pipe (see Figure 9(a)). Specifically, the pipe lower shaping bond 19a is rubbed with the worker's fingers onto the bottom surface of the inner recess 18b of the corrugated rigid synthetic resin pipe, which is located approximately 20 mm from the pipe opening 4 of the corrugated rigid synthetic resin pipe 2, and the bottom surface of the adjacent inner recess 18b of the corrugated rigid synthetic resin pipe, ensuring that no air is trapped between the inner recess 18b of the corrugated rigid synthetic resin pipe and the pipe lower shaping bond 19a. In this way, the lower pipe shaping member 19a (lower pipe shaping member) is rubbed against the bottom surface of the recess 18b on the inner surface of the corrugated rigid synthetic resin pipe 2, which is formed in a spiral shape inside the corrugated rigid synthetic resin pipe 2. Here, Figure 9(a) shows the state in which the lower pipe shaping bond has been rubbed against the bottom surface of the recess on the inner surface of the corrugated rigid synthetic resin pipe in the lower pipe shaping member rubbing step of the corrugated rigid synthetic resin pipe outlet water sealing method using the high-performance pipe outlet water sealing device in the first embodiment of the present invention. Then, the process proceeds to S42.

[0038] In S42, the pipe recess upper shaping member application process is carried out. In this pipe recess upper shaping member application process, the pipe upper shaping bond 19b (pipe upper shaping member) is applied from the upper surface of the pipe lower shaping bond 19a, which was rubbed in the pipe recess bottom lower shaping member application process (S41), up to the top of the corrugated rigid synthetic resin inner surface recess 18b (see Figure 9(b)). Specifically, the pipe upper shaping bond 19b is applied by the worker's finger, piling it up to a height of approximately 1 mm from the apex of the corrugated rigid synthetic resin inner surface protrusion 18a. In this way, the pipe upper shaping bond 19b (pipe upper shaping member) is applied from the upper surface of the pipe lower shaping bond 19a (pipe lower shaping member) up to the top of the corrugated rigid synthetic resin inner surface recess 18b. Here, Figure 9(b) shows the state in which the upper shaping bond for the upper part of the corrugated rigid synthetic resin pipeline inner surface recess has been applied up to the upper part of the recess in the corrugated rigid synthetic resin pipeline, during the pipeline recess upper shaping member application step of the corrugated rigid synthetic resin pipeline recess upper shaping member application step using the high-performance pipeline outlet waterproofing device in the first embodiment of the present invention. Then, proceed to S43.

[0039] In this way, since a lower pipe shaping bond 19a is rubbed onto the inner surface recess 18b of the corrugated rigid synthetic resin pipe and an upper pipe shaping bond 19b is applied from the upper surface of the lower pipe shaping bond 19a, the lower pipe shaping bond 19a and the upper pipe shaping bond 19b can be easily applied to the inner surface recess 18b of the corrugated rigid synthetic resin pipe on the inner surface of the pipe opening 4 of the corrugated rigid synthetic resin pipe 2, and the surface of the inner surface recess 18b of the corrugated rigid synthetic resin pipe can be easily shaped into a substantially flat surface.

[0040] In S43, the pipe recess upper shaping member joining process is carried out. In this pipe recess upper shaping member joining process, after the pipe recess upper shaping member coating process (S42) is carried out, adjacent pipe upper shaping bond 19b (pipe upper shaping member) applied to the spirally shaped corrugated rigid synthetic resin inner surface recess 18b is joined together to form a pipe upper shaping member joining section 19c, and the inner surface of the corrugated rigid synthetic resin pipe 2 is shaped into a substantially flat surface (see Figure 9(c)). Specifically, the pipe upper shaping bond 19b (pipe upper shaping member) applied to the recessed part 18b of the corrugated rigid synthetic resin pipe, up to a height of approximately 1 mm from the apex of the inner surface convex part 18a of the corrugated rigid synthetic resin pipe, and the pipe upper shaping bond 19b (pipe upper shaping member) applied to the adjacent corrugated rigid synthetic resin pipe inner surface convex part 18a on the pipe side, up to a height of approximately 1 mm, are joined together using a bamboo spatula. Then, the surface of the pipe upper shaping bond 19b (pipe upper shaping member) applied to the recessed part 18b of the corrugated rigid synthetic resin pipe (including the pipe upper shaping member joining part 19c) is smoothed with a wet cloth to make the surface of the pipe upper shaping bond 19b applied to the recessed part 18b of the corrugated rigid synthetic resin pipe (including the pipe upper shaping member joining part 19c) approximately flat and shaped. In this way, adjacent pipe upper shaping bonds 19b (pipe upper shaping members) applied to the spirally shaped recesses 18b on the inner surface of the corrugated rigid synthetic resin pipe are joined together by the pipe upper shaping member joining section 19c. Here, Figure 9(c) shows the state in which the pipe shaping bonds applied to the inner surface recesses of the corrugated rigid synthetic resin pipe are joined together in the pipe recess upper shaping member joining step of the corrugated rigid synthetic resin pipe opening water sealing method using the high-performance pipe opening water sealing device in the first embodiment of the present invention. Then, proceed to S5.

[0041] Thus, the corrugated rigid synthetic resin pipe opening watertight structure is composed of a pipe lower shaping bond 19a (pipe lower shaping member) rubbed against the bottom surface of the spirally shaped recess 18b on the inner surface of the corrugated rigid synthetic resin pipe 2, a pipe upper shaping bond 19b (pipe upper shaping member) applied from the upper surface of the pipe lower shaping bond 19a (pipe lower shaping member) up to the top of the spirally shaped recess 18b on the inner surface of the corrugated rigid synthetic resin pipe, and a pipe upper shaping member connecting section 19c where adjacent pipe upper shaping bond 19b (pipe upper shaping members) applied to the spirally shaped recess 18b on the inner surface of the corrugated rigid synthetic resin pipe, are joined together. Then, after the lower pipe shaping bond 19a (lower pipe shaping member) is rubbed onto the bottom surface of the recess 18b on the inner surface of the corrugated rigid synthetic resin pipe, the upper pipe shaping bond 19b (upper pipe shaping member) is applied from the upper surface of the lower pipe shaping bond 19a (lower pipe shaping member) up to the top of the recess 18b on the inner surface of the corrugated rigid synthetic resin pipe. This makes it difficult for the lower pipe shaping bond 19a and the upper pipe shaping bond 19b to peel off from the recess 18b on the inner surface of the corrugated rigid synthetic resin pipe. Furthermore, adjacent pipe upper shaping adhesives 19b (pipe upper shaping members) applied to the spirally shaped recesses 18b on the inner surface of the corrugated rigid synthetic resin pipe are joined together, and the joint portion 19c of the pipe upper shaping members where these pipe upper shaping adhesives 19b (pipe upper shaping members) are joined forms a substantially flat surface on the inner surface of the corrugated rigid synthetic resin pipe 2. As a result, the high-performance pipe opening water-sealing device 1 can be easily installed inside the corrugated rigid synthetic resin pipe 2, and the pipe opening 4 of the corrugated rigid synthetic resin pipe 2 can be easily and sufficiently sealed. Here, the pipe lower shaping member is not limited to the pipe lower shaping adhesive 19a, and the pipe upper shaping member is not limited to the pipe upper shaping adhesive 19b.

[0042] In S5, the water-stopping device assembly process is carried out. In this water-stopping device assembly process, the clamping plates 7 (front clamping plate 7a, rear clamping plate 7b) are joined to the front and rear of the seal block body 6 such that the cutting points in the insertion direction of the seal block body 6 are shifted one notch clockwise from the cutting points in the insertion direction of the clamping plates 7. Then, the clamping bolts 8a are inserted through the clamping plate bolt insertion holes 13 of the clamping plates 7 and the block body bolt insertion holes 11 of the seal block body 6, and nuts 8b are screwed onto the clamping bolts 8a to assemble the high-performance pipeline opening water-stopping device 1. Herein, this water-stopping device assembly process is often carried out in factories or offices other than construction sites. Note that if an assembled high-performance pipeline opening water-stopping device 1 already exists, this process is unnecessary and is therefore optional. Then, the process proceeds to S6.

[0043] In S6, the tightening bolt removal process is performed. In this tightening bolt removal process, one nut 8b that was screwed onto the tightening bolt 8a of the high-performance pipeline outlet water-stopping device 1 assembled in the water-stopping device assembly process (S5) is removed from the tightening bolt 8a, and then the tightening bolt 8a from which the nut 8b has been removed is pulled out from the tightening plate bolt insertion hole 13 and the block body bolt insertion hole 11. Note that if there is a high-performance pipeline outlet water-stopping device 1 from which one tightening bolt 8a has been pulled out from the tightening plate bolt insertion hole 13 and the block body bolt insertion hole 11, this process is unnecessary and therefore optional. Then, the process proceeds to S7.

[0044] In S7, the cable insertion process is performed. In this cable insertion process, the power cable 3 is inserted into the block body cable insertion hole 10 of the seal block body 6 of the high-performance pipeline opening watertight device 1 and into the tightening plate cable insertion holes 12 of the tightening plates 7 located in front of and behind the seal block body 6. Specifically, the power cable 3 is inserted into the block body cable insertion hole 10 and the tightening plate cable insertion hole 12 through the opening created where the tightening bolt 8a was removed in the tightening bolt removal process (S6). In other words, the cut portion of the seal block body 6 (tightening plate 7) where the tightening bolt 8a was removed in the tightening bolt removal process (S6) is widened, and the power cable 3 is inserted through the widened opening. In addition, the cable insertion process may be carried out by a method other than that of this embodiment, in which the power cable 3 is inserted into the cable insertion hole 10 of the block body of the seal block body 6 of the high-performance conduit opening water-stopping device 1, which has an outer circumference substantially the same diameter as the top of the corrugated rigid synthetic resin conduit inner surface protrusion 18a on the inner surface of the conduit opening 4 of the corrugated rigid synthetic resin conduit 2 and an outer circumference substantially flat, and into the clamping plate cable insertion holes 13 of the clamping plates 7 arranged in front of and behind the seal block body 6. Then proceed to S8.

[0045] In S8, the remaining tightening bolt insertion process is performed. In this remaining tightening bolt insertion process, with the power cable 3 inserted in the cable insertion process (S7), the tightening bolts 8a are inserted into the tightening plate bolt insertion holes 13 and the block body bolt insertion holes 11, which do not currently have tightening bolts 8a inserted. In other words, the tightening bolts 8a are inserted into the tightening plate bolt insertion holes 13 and the block body bolt insertion holes 11 where the tightening bolts 8a were removed in the tightening bolt removal process (S6), and nuts 8b are attached to the tightening bolts 8a that have been inserted into the tightening plate bolt insertion holes 13 and the block body bolt insertion holes 11. Then, the process proceeds to S9.

[0046] In S9, the water-stopping device pipe opening insertion process is performed. In this water-stopping device pipe opening insertion process, with the power cable 3 inserted through the block body cable insertion hole 10 of the seal block body 6 and the tightening plate cable insertion hole 12 of the tightening plate 7 by the cable insertion process (S7), a high-performance pipe opening water-stopping device 1, whose outer circumference is approximately the same diameter as the top of the corrugated rigid synthetic resin conduit inner surface protrusion 18a on the inner surface of the corrugated rigid synthetic resin conduit 2 and whose outer circumference is approximately flat, is inserted into the pipe opening 4 of the corrugated rigid synthetic resin conduit 2. Specifically, in this water-stopping device pipe opening insertion process, the high-performance pipe opening water-stopping device 1, with tightening bolts 8a inserted through all the tightening plate bolt insertion holes 13 and block body bolt insertion holes 11, is inserted into the pipe opening 4 of the corrugated rigid synthetic resin conduit 2. In other words, with the high-performance conduit opening water-sealing device 1 attached around the conduit opening 4 of the power cable 3, the high-performance conduit opening water-sealing device 1 is inserted into the conduit opening 4 of the corrugated rigid synthetic resin conduit 2. Then the process proceeds to S10.

[0047] In S10, a preliminary tightening process for the fastening bolts is performed. In this preliminary tightening process, with the high-performance pipe opening water-stopping device 1 inserted into the pipe opening 4 of the corrugated rigid synthetic resin pipe 2 by the water-stopping device pipe opening insertion process (S9), the fastening bolts 8a inserted through the block body bolt insertion holes 11 of the seal block body 6 and the fastening plate bolt insertion holes 13 of the fastening plate 7 are preliminaryly tightened. Specifically, after the pipe upper shaping bond 19b applied to the inner surface recess 18b of the corrugated rigid synthetic resin pipe has begun to harden, that is, after the pipe upper shaping bond 19b applied to the inner surface recess 18b of the corrugated rigid synthetic resin pipe has hardened to the consistency of an earlobe (approximately 30 minutes to 1 hour after the pipe recess flattening process (S4) has been performed), the circumferential portion of the seal block body 6 of the high-performance pipe opening water-stopping device 1 lightly touches the inner surface protrusion 18a of the corrugated rigid synthetic resin pipe 2, that is, with a force of approximately 5 Nm, the nuts 8b attached to the tightening bolts 8a inserted into the block body bolt insertion holes 11 of the seal block body 6 and the tightening plate bolt insertion holes 13 of the tightening plate 7 are loosely screwed on, thereby temporarily tightening the tightening bolts 8a. In this embodiment, a high-performance conduit opening watertight device using a single-core (one-cable) cable is used for explanation. Therefore, the tightening bolts 8 inserted through the block body bolt insertion holes 11 of the seal block body 6 and the tightening plate bolt insertion holes 13 of the tightening plate 7 were temporarily tightened to a strength of approximately 5 Nm. However, when using a high-performance conduit opening watertight device 1 for a CVT cable (three-cable), the tightening bolts 8 inserted through the block body bolt insertion holes 11 of the seal block body 6 and the tightening plate bolt insertion holes 13 of the tightening plate 7 are temporarily tightened to a strength of approximately 1 Nm. Furthermore, in this embodiment, the tightening bolt 8a was temporarily tightened by screwing a nut 8b onto the tightening bolt 8a. However, this is not limited to this method. If female threads are threaded on the inner surface of the tightening plate bolt insertion hole 13 of the tightening plate 7, the tightening bolt 8a can be temporarily tightened by screwing the male threads on the outer surface of the tightening bolt 8a with the female threads on the inner surface of the tightening plate bolt insertion hole 13. Then, we move on to S11.

[0048] In S11, the tightening bolt process is carried out. In this tightening bolt process, after the pipe upper shaping bond 19b applied to the inner surface recess 18b of the corrugated rigid synthetic resin pipe has hardened, the tightening bolts 8a inserted through the block body bolt insertion holes 11 of the seal block body 6 and the tightening plate bolt insertion holes 13 of the tightening plate 7 are tightened, thereby pressing the seal block body 6 against the corrugated rigid synthetic resin pipe 2 via the tightening plate 7 (see Figure 10). Specifically, after the pipe upper shaping bond 19b applied to the inner surface recess 18b of the corrugated rigid synthetic resin pipe has completely hardened (approximately 4 hours after the pipe recess flattening process (S4) has been performed), the high-performance pipe opening water-stopping device 1 is inserted into the pipe opening 4 of the corrugated rigid synthetic resin pipe 2 by the water-stopping device pipe opening insertion process (S9). At this point, the nuts 8b that are loosely screwed onto the tightening bolts 8a inserted through the tightening plate bolt insertion holes 13 and the block body bolt insertion holes 11 are tightened with a force of approximately 6 Nm, and the tightening bolts 8a are tightened, thereby tightening the seal block body 6 via the tightening plate 7 and pressing it against the corrugated rigid synthetic resin pipe 2. In this embodiment, a high-performance pipeline opening water-sealing device using a single-core (one-cable) cable is used for explanation. Therefore, the tightening bolts 8 inserted through the block body bolt insertion holes 11 of the seal block body 6 and the tightening plate bolt insertion holes 13 of the tightening plate 7 are tightened to a strength of approximately 6 Nm. However, when using a high-performance pipeline opening water-sealing device 1 using a CVT cable (three-cable), the tightening bolts 8 inserted through the block body bolt insertion holes 11 of the seal block body 6 and the tightening plate bolt insertion holes 13 of the tightening plate 7 are tightened to a strength of approximately 2 Nm. Here, Figure 10 is a partially cross-sectional view showing the state in which the high-performance pipeline opening water-sealing device according to the first embodiment of the present invention is attached to a pipeline.

[0049] As described above, by inserting the high-performance pipe opening water-sealing device 1 into the flattened corrugated rigid synthetic resin pipe 2, the high-performance pipe opening water-sealing device 1 can be easily installed in the pipe opening 4 of the corrugated rigid synthetic resin pipe 2. Furthermore, by pressing the seal block body 6 against the corrugated rigid synthetic resin pipe 2 with the tightening bolt 8a, a sufficient water-sealing effect can be obtained at the pipe opening 4 of the corrugated rigid synthetic resin pipe 2. Thus, even in the case of a corrugated rigid synthetic resin pipe 2 in which an inner surface recess 18b (groove (spiral)) is formed, a sufficient water-sealing effect can be obtained at the pipe opening 4 of the corrugated rigid synthetic resin pipe 2. Hereafter, it has been demonstrated that the corrugated rigid synthetic resin pipe opening water-sealing method using the high-performance pipe opening water-sealing device 1 of this embodiment can withstand high water pressure of at least 0.2 MPa.

[0050] (Second Embodiment) Next, the high-performance pipeline opening water-stopping device 1A in the second embodiment of the present invention will be described.

[0051] The difference between the second embodiment and the first embodiment is that in the first embodiment, the power cable 3 is inserted into the block body cable insertion hole 10 of the seal block body 6 of the high-performance pipeline outlet water-stopping device 1 and into the tightening plate cable insertion hole 12 of the tightening plate 7 arranged in front of and behind the seal block body 6, whereas in the second embodiment, the power cable 3 is not inserted into the seal block body 20 of the high-performance pipeline outlet water-stopping device 1A and into the tightening plate 21 arranged in front of and behind the seal block body 20. The second embodiment will be described mainly in terms of the differences from the first embodiment. Here, in the second embodiment, components with the same configuration as in the first embodiment will be given the same reference numerals and will have the same effect, and their explanation will be omitted.

[0052] The high-performance pipeline opening water-sealing device 1A consists of a seal block body 20 and a clamping plate 21 (front clamping plate 21a, rear clamping plate 21b) (see Figure 11). Here, Figure 11 is a perspective view of the high-performance pipeline opening water-sealing device according to the second embodiment of the present invention.

[0053] Next, the seal block body 20 of the high-performance pipeline opening water-stopping device 1A in the second embodiment will be specifically described with reference to Figure 12. Here, Figure 12(a) is a side view of the seal block body of the high-performance pipeline opening water-stopping device in the second embodiment of the present invention, and Figure 12(b) is a front view of the seal block body of the same high-performance pipeline opening water-stopping device.

[0054] The seal block body 20 is formed in a cylindrical shape using ethylene propylene rubber as the material, and its front end outer diameter and rear end outer diameter are formed to be approximately the same diameter as the top of the corrugated rigid synthetic resin convex portion 18a on the inner surface of the conduit opening 4 of the corrugated rigid synthetic resin conduit 2 (see Figure 12(a)). The outer diameter of the longitudinal center is formed to be slightly smaller than the front end outer diameter and rear end outer diameter, and a hollow block body bolt insertion hole 20a is provided in the center of the cross-section of the seal block body 20 (see Figure 12(b)). The rubber hardness of the seal block body 20 is approximately 30 degrees. In this embodiment, the outer diameter of the longitudinal center is formed to be slightly smaller than the front end outer diameter and rear end outer diameter, but it is not limited to this, and the diameter of the longitudinal center may be formed to be approximately the same diameter as the front end outer diameter and rear end outer diameter. Furthermore, in this embodiment, the rubber hardness of the seal block body 20 is formed to be approximately 30 degrees, but it is not limited to this, and the rubber hardness of the seal block body 20 may be set to other rubber hardnesses such as 20 degrees to 45 degrees (preferably 25 degrees to 40 degrees (more preferably 25 degrees to 35 degrees)).

[0055] Next, the clamping plate 21 in the second embodiment will be specifically described using Figures 13 and 14. Here, Figure 13(a) is a side view of the front clamping plate of the high-performance pipeline outlet water-stopping device in the second embodiment of the present invention, Figure 13(b) is a front view of the front clamping plate of the high-performance pipeline outlet water-stopping device, Figure 13(c) is a rear perspective view of the front clamping plate of the high-performance pipeline outlet water-stopping device, Figure 14(a) is a side view of the rear clamping plate of the high-performance pipeline outlet water-stopping device in the second embodiment of the present invention, Figure 14(b) is a front view of the rear clamping plate of the high-performance pipeline outlet water-stopping device, and Figure 14(c) is a rear perspective view of the rear clamping plate of the high-performance pipeline outlet water-stopping device.

[0056] The clamping plate 21 consists of a front clamping plate 21a and a rear clamping plate 21b, and is made of MC nylon (registered trademark) or stainless steel, which is polymerized and molded (cast) nylon monomer under atmospheric pressure. Similar to the seal block body 20, it is provided with clamping plate bolt insertion holes 22 through which the clamping bolts 8a are inserted. The specific details will be described later.

[0057] The front clamping plate 21a is positioned in front of the seal block body 20 (towards the back of the corrugated rigid synthetic resin pipeline 2), and the seal block body 20 is clamped by the front clamping plate 21a and the rear clamping plate 21b, which will be described later. The rear end of the front clamping plate 21a is formed in a substantially cylindrical shape, with the outer diameter of the rear end being smaller than that of the front end and widening towards the front end (see Figure 13(a)). In addition, a clamping plate bolt insertion hole 22 is provided in the center of the cross-section of the rear end of the front clamping plate 21a, through which a clamping bolt 8a is inserted, and the clamping plate bolt insertion hole 22 is formed in a circular shape with a cross-sectional shape slightly larger than that of the clamping bolt 8a (see Figure 13(b)).

[0058] The rear clamping plate 21b is positioned behind the seal block body 20 (on the side of the corrugated rigid synthetic resin conduit 2's conduit opening 4), and as described above, the seal block body 20 is clamped by the front clamping plate 21a and the rear clamping plate 21b. The outer diameter of the rear clamping plate 21b is formed such that the longitudinal center is approximately the same diameter as the top of the corrugated rigid synthetic resin conduit inner surface convex portion 18a on the inner surface of the conduit opening 4 of the corrugated rigid synthetic resin conduit 2. The outer diameter of the rear clamping plate 21b is wider towards the rear end than the outer diameter of the longitudinal front end, and the inner diameter of the rear clamping plate 21b is narrowed from the front end towards the center of the cross-section. In the narrowed rear interior, a roughly cylindrical shape is formed that is slightly larger than the rear end of the front clamping plate 21a (see Figure 14(a)). Furthermore, similar to the front clamping plate 21a, a clamping plate bolt insertion hole 22 is provided approximately in the center of the cross-section of the rear clamping plate 21b, through which the clamping bolt 8a is inserted (see Figure 14(b)).

[0059] Next, a corrugated rigid synthetic resin pipeline opening sealing method using the high-performance pipeline opening sealing device 1A in the second embodiment will be described. Here, Figure 15(a) is a flowchart of the corrugated rigid synthetic resin pipeline opening sealing method using the high-performance pipeline opening sealing device in the second embodiment of the present invention, Figure 15(b) is a subroutine flowchart of the pipeline recess flattening process in the corrugated rigid synthetic resin pipeline opening sealing method using the same high-performance pipeline opening sealing device, and Figure 16 is a cross-sectional view showing the state in which the high-performance pipeline opening sealing device is attached to the pipeline.

[0060] The first steps performed—the internal conduit cleaning step (S12), the conduit recess flattening step (S22), the conduit recess bottom surface lower shaping member rubbing step (S221), the conduit recess upper shaping member coating step (S222), and the conduit recess upper shaping member joining step (S223)—are the same as those in the first embodiment, except for those relating to the power cable 3, so their explanation is omitted. In this second embodiment, the cable suspension step (S1) and the cable central position support step (S3) of the first embodiment are not performed.

[0061] In S32, the water-stopping device assembly process is carried out. In this water-stopping device assembly process, clamping plates 21 (21a, 21b) are joined to the front and back of the seal block body 20. Specifically, the front clamping plate 21a is joined to the front of the seal block body 20 (the far side of the corrugated rigid synthetic resin pipeline 2), and the rear clamping plate 21b is joined to the rear of the seal block body 20 (the side of the pipeline opening 4 of the corrugated rigid synthetic resin pipeline 2). Then, the clamping bolts 8a are inserted through the clamping plate bolt insertion holes 22 of the clamping plate 21 and the block body bolt insertion holes 20a of the seal block body 20, and nuts 8b are screwed onto the clamping bolts 8a to assemble the high-performance pipeline opening water-stopping device 1A. Note that if an assembled high-performance pipeline opening water-stopping device 1A already exists, this process is unnecessary and therefore optional. Furthermore, in the second embodiment, the water-stopping device assembly process (S32) is performed instead of the water-stopping device assembly process (S5) in the first embodiment. Then, the process proceeds to S42.

[0062] In S42, the water-stopping device pipe opening insertion process is performed. In this water-stopping device pipe opening insertion process, a high-performance pipe opening water-stopping device 1A, whose outer circumference is approximately the same diameter as the top of the corrugated rigid synthetic resin pipe inner surface protrusion 18a on the inner surface of the corrugated rigid synthetic resin pipe 2 and whose outer surface is approximately flat, is inserted into the pipe opening 4 of the corrugated rigid synthetic resin pipe 2 (see Figure 16). That is, the high-performance pipe opening water-stopping device 1A, with tightening bolts 8a inserted through the tightening plate bolt insertion holes 22 and the block body bolt insertion holes 20a, is inserted into the pipe opening 4 of the corrugated rigid synthetic resin pipe 2. Then, the process proceeds to S52. In this second embodiment, the tightening bolt removal step (S6), cable insertion step (S7), and remaining tightening bolt insertion step (S8) of the first embodiment are not performed, and the water-stopping device pipe opening insertion step (S42) is performed instead of the water-stopping device pipe opening insertion step (S9).

[0063] In S52, a preliminary tightening process for the fastening bolts is performed. In this preliminary tightening process, with the high-performance pipe opening water-stopping device 1A inserted into the pipe opening 4 of the corrugated rigid synthetic resin pipe 2 by the water-stopping device pipe opening insertion process (S42), the fastening bolts 8a inserted through the block body bolt insertion holes 20a of the seal block body 20 and the fastening plate bolt insertion holes 22 of the fastening plates 21 (21a, 21b) are preliminaryly tightened. Specifically, after the pipe shaping bond 19 applied to the inner recess 18b of the corrugated rigid synthetic resin pipe has begun to harden, that is, after the pipe upper shaping bond 19b applied to the inner recess 18b of the corrugated rigid synthetic resin pipe has hardened to the consistency of an earlobe (approximately 30 minutes to 1 hour after the pipe recess flattening process (S22) has been performed), the circumferential portion of the seal block body 20 of the high-performance pipe opening water-stopping device 1A lightly touches the inner protrusion 18a of the corrugated rigid synthetic resin pipe on the inner surface of the pipe opening 4 of the corrugated rigid synthetic resin pipe 2 with a force of approximately 5 Nm, and the nuts 8b attached to the tightening bolts 8a inserted into the block body bolt insertion holes 20a of the seal block body 20 and the tightening plate bolt insertion holes 22 of the tightening plate 21 are loosely screwed on, thereby temporarily tightening the tightening bolts 8a. Then, the process proceeds to S62. In this second embodiment, the pre-tightening step (S52) of the fastening bolts is performed instead of the pre-tightening step (S10) of the first embodiment.

[0064] In S62, the tightening bolt process is carried out. In this tightening bolt process, after the pipe upper shaping bond 19b applied to the inner surface recess 18b of the corrugated rigid synthetic resin pipe is cured, the tightening bolts 8a inserted through the block body bolt insertion holes 20a of the seal block body 20 and the tightening plate bolt insertion holes 22 of the tightening plate 21 are tightened, thereby pressing the seal block body 20 against the corrugated rigid synthetic resin pipe 2 via the tightening plate 21 (21a, 21b) (see Figure 16). Specifically, after the pipe upper shaping bond 19b applied to the inner recess 18b of the corrugated rigid synthetic resin pipe has completely hardened (approximately 4 hours after the pipe recess flattening process (S22) has been performed), with the high-performance pipe opening water-stopping device 1A inserted into the pipe opening 4 of the corrugated rigid synthetic resin pipe 2, the nuts 8b that are loosely screwed onto the tightening bolts 8a inserted through the tightening plate bolt insertion holes 22 and the block body bolt insertion holes 20a are tightened with a force of approximately 6 Nm, thereby tightening the tightening bolts 8a and tightening the seal block body 20 by the front and rear tightening plates 21. As a result, the seal block body 20 expands radially due to the tightening of the tightening plates 21 and is pressed against the inner circumferential surface of the corrugated rigid synthetic resin pipe 2.

[0065] As explained above, by inserting the high-performance pipe opening water-sealing device 1A into the flattened corrugated rigid synthetic resin pipe 2, the high-performance pipe opening water-sealing device 1A can be easily installed in the pipe opening 4 of the corrugated rigid synthetic resin pipe 2. Furthermore, by pressing the seal block body 20 against the inner circumferential surface of the corrugated rigid synthetic resin pipe 2 with the tightening bolt 8a, a sufficient water-sealing effect can be obtained at the pipe opening 4 of the corrugated rigid synthetic resin pipe 2. Thus, even in the case of a corrugated rigid synthetic resin pipe 2 in which an inner recess 18b (groove (spiral)) is formed, a sufficient water-sealing effect can be obtained at the pipe opening 4 of the corrugated rigid synthetic resin pipe 2.

[0066] The embodiments disclosed herein should be considered in all respects to be illustrative and not restrictive. The scope of the invention is indicated by the claims rather than by the foregoing description, and all modifications within the meaning and scope equivalent to the claims are intended to be included. [Explanation of Symbols]

[0067] 1. High-performance pipeline opening water-stopping device 1A High-performance pipeline opening watertight device 2 Corrugated hard synthetic resin pipe 3 Power Cables 4 Pipe port 5 Manholes 6 Seal block body 7. Clamping plate 8a Tightening bolt 8b nut 9. Sealant 10 Block-type cable insertion holes 11 Bolt insertion holes for block body 12. Cable insertion holes in clamping plates 13 Bolt insertion holes for fastening plates 14 Cavity 15 Core material 16 Putty Tape 17 Polyurethane foam board 18a Corrugated rigid synthetic resin conduit inner surface protrusions 18b Corrugated rigid synthetic resin pipe inner surface recess 19 Pipe shaping bond 19a Lower part of pipe shaping bond 19b Pipe upper shaping bond 19c Upper shaping member joint section of the pipeline 20 Seal block body 20a Bolt insertion holes for block body 21 Tightening plate 21a Front tightening board 21b Rear tightening board 22 Bolt insertion holes for fastening plates 34 Cable connection section

Claims

1. In a corrugated rigid synthetic resin pipe opening watertight structure for sealing the opening of a corrugated rigid synthetic resin pipe, A lower pipe shaping member is rubbed against the bottom surface of a spiral-shaped recess on the inner surface of the corrugated rigid synthetic resin pipe, which is formed inside the corrugated rigid synthetic resin pipe. A pipe upper shaping member is applied from the upper surface of the pipe lower shaping member up to the upper part of the corrugated rigid synthetic resin inner surface recess of the pipe, It has a pipe upper shaping member connecting section, which connects adjacent pipe upper shaping members that are applied to the recessed inner surface of the corrugated rigid synthetic resin pipe formed in a spiral shape, A corrugated rigid synthetic resin pipe opening water-stopping structure in which the inner surface of the corrugated rigid synthetic resin pipe is formed to be substantially flat by the connecting portion of the upper shaping member of the pipe, thereby enabling easy and sufficient water-stopping of the pipe opening of the corrugated rigid synthetic resin pipe.

2. The corrugated rigid synthetic resin pipe opening watertight structure is characterized in that the lower pipe shaping member and the upper pipe shaping member are pipe shaping bond.

3. In a high-performance pipe opening water-stopping device used in a corrugated rigid synthetic resin pipe opening water-stopping structure for sealing the pipe opening of a corrugated rigid synthetic resin pipe, A rubber seal block body is placed inside the corrugated rigid synthetic resin conduit, the outer circumference of which is approximately the same diameter as the top of the inner surface protrusion of the corrugated rigid synthetic resin conduit, the outer surface of which is approximately flat, and the block body bolt insertion holes are provided in the direction of the conduit. A tightening plate is provided on the front and rear of the seal block body, and is provided with tightening plate bolt insertion holes in the direction of the pipeline, The seal block body has bolt insertion holes in the block body and fastening bolts that are inserted into the fastening plate bolt insertion holes in the fastening plates on the front and rear of the seal block body, A high-performance pipe opening water-sealing device used in a corrugated rigid synthetic resin pipe opening water-sealing structure according to claim 2, wherein the tightening bolts inserted through the bolt insertion holes of the seal block body and the tightening plate bolt insertion holes of the tightening plate tighten the tightening plates on the front and rear of the seal block body, and the seal block body is pressed against the corrugated rigid synthetic resin pipe, thereby providing a sufficient water-sealing effect at the pipe opening of the corrugated rigid synthetic resin pipe.

4. In a corrugated rigid synthetic resin pipe opening water sealing method using a high-performance pipe opening water sealing device used in a corrugated rigid synthetic resin pipe opening water sealing structure for sealing the pipe opening of a corrugated rigid synthetic resin pipe, A pipeline internal surface cleaning process is performed in which the inner surface of the corrugated rigid synthetic resin pipeline is cleaned, A pipe recess bottom surface lower shaping member rubbing step, in which the pipe recess bottom surface lower shaping member is rubbed against the bottom surface of the recess on the inner surface of the corrugated rigid synthetic resin pipe, A pipe recess upper shaping member application step is performed, in which the pipe recess upper shaping member is applied from the upper surface of the pipe recess lower shaping member that has been rubbed in the pipe recess lower shaping member application step up to the upper part of the corrugated rigid synthetic resin inner surface recess of the pipe, After the pipe recess upper shaping member coating process is performed, the pipe recess upper shaping member joining process is performed, in which adjacent pipe recess upper shaping members coated on the spirally shaped recesses of the corrugated rigid synthetic resin inner surface of the pipe are joined together to form a pipe recess upper shaping member joining section, and the inner surface of the corrugated rigid synthetic resin pipe is shaped to be substantially flat. The high-performance pipe opening water-stopping device, whose outer circumference is substantially the same diameter as the top of the inner surface protrusion of the corrugated rigid synthetic resin pipe and whose outer surface is substantially flat, is inserted into the pipe opening of the corrugated rigid synthetic resin pipe in a water-stopping device pipe opening insertion step, With the high-performance pipe opening water-stopping device inserted into the pipe opening of the corrugated rigid synthetic resin pipe through the water-stopping device pipe opening insertion process, the tightening bolts inserted through the bolt insertion holes of the seal block body and the tightening plate bolt insertion holes of the tightening plate are temporarily tightened in a tightening bolt temporary tightening process, The process includes a tightening bolt step in which, after the upper shaping member of the pipeline applied to the recess on the inner surface of the corrugated rigid synthetic resin pipeline has hardened, the tightening bolts inserted through the bolt insertion holes of the seal block body and the tightening plate bolt insertion holes of the tightening plate are tightened, thereby pressing the seal block body against the corrugated rigid synthetic resin pipeline via the tightening plate, The high-performance pipe opening water-sealing device is inserted into the flattened corrugated rigid synthetic resin pipe, allowing the high-performance pipe opening water-sealing device to be easily installed in the pipe opening of the corrugated rigid synthetic resin pipe, and the seal block body is pressed against the corrugated rigid synthetic resin pipe by the tightening bolt, thereby providing a sufficient water-sealing effect at the pipe opening of the corrugated rigid synthetic resin pipe, as described in claim 3.

5. In a corrugated rigid synthetic resin conduit The seal block body is provided with a block body cable insertion hole for inserting a cable, The clamping plate is provided with a clamping plate cable insertion hole for inserting a cable, A cable lifting process in which the conduit opening portion of a cable laid in the corrugated rigid synthetic resin conduit is lifted to approximately the center of the conduit opening of the corrugated rigid synthetic resin conduit, With the cable suspended by the cable suspension process, the inner surface of the corrugated rigid synthetic resin conduit is cleaned in a conduit inner surface cleaning process, A cable central position support step is performed in which the conduit opening portion of the cable lifted by the cable lifting step is supported by cable position support means at approximately the center of the conduit opening of the corrugated rigid synthetic resin conduit, A pipe recess bottom surface lower shaping member rubbing step, in which the pipe recess bottom surface lower shaping member is rubbed against the bottom surface of the recess on the inner surface of the corrugated rigid synthetic resin pipe, A pipe recess upper shaping member application step is performed, in which the pipe recess upper shaping member is applied from the upper surface of the pipe recess lower shaping member that has been rubbed in the pipe recess lower shaping member application step up to the upper part of the corrugated rigid synthetic resin inner surface recess of the pipe, After the pipe recess upper shaping member coating process is performed, the pipe recess upper shaping member joining process is performed, in which adjacent pipe recess upper shaping members coated on the spirally shaped corrugated rigid synthetic resin inner surface recess of the pipe are joined together to form a pipe recess upper shaping member joining section, and the inner surface of the corrugated rigid synthetic resin pipe is shaped into a substantially flat surface. A cable insertion step in which a cable is inserted into the cable insertion hole of the seal block body of the high-performance pipeline outlet water-stopping device and into the cable insertion hole of the clamping plate of the clamping plate arranged before and after the seal block body, With the cable inserted through the cable insertion hole of the seal block body and the cable insertion hole of the clamping plate, the high-performance pipe opening water-stopping device, whose outer circumference is substantially the same diameter as the top of the inner surface protrusion of the corrugated rigid synthetic resin pipe on the inner surface of the corrugated rigid synthetic resin pipe and whose outer surface is substantially flat, is inserted into the pipe opening of the corrugated rigid synthetic resin pipe in a water-stopping device pipe opening insertion step, With the high-performance pipe opening water-stopping device inserted into the pipe opening of the corrugated rigid synthetic resin pipe through the water-stopping device pipe opening insertion process, the tightening bolts inserted through the bolt insertion holes of the seal block body and the tightening plate bolt insertion holes of the tightening plate are temporarily tightened in a tightening bolt temporary tightening process, The process includes a tightening bolt step in which, after the upper shaping member of the pipeline applied to the recess on the inner surface of the corrugated rigid synthetic resin pipeline has hardened, the tightening bolts inserted through the bolt insertion holes of the seal block body and the tightening plate bolt insertion holes of the tightening plate are tightened, thereby pressing the seal block body against the corrugated rigid synthetic resin pipeline via the tightening plate, The high-performance pipe opening water-sealing device is inserted into the flattened corrugated rigid synthetic resin pipe, allowing the high-performance pipe opening water-sealing device to be easily installed in the pipe opening of the corrugated rigid synthetic resin pipe, and the seal block body is pressed against the corrugated rigid synthetic resin pipe by the tightening bolt, thereby providing a sufficient water-sealing effect at the pipe opening of the corrugated rigid synthetic resin pipe, as described in claim 3.

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