JP5249599B2 - A closing member, a sealing member, a closing member removal detector, and a synthetic resin pipe repair method. - Google Patents

Description

  The present invention relates to a synthetic resin pipe, in particular, a closing member for closing a hole drilled in a gas pipe, a sealing member, a method for repairing a synthetic resin pipe using these members, and a closing member used in this method It relates to an extraction detector.

  Pipes made of synthetic resin such as polyethylene are often used as gas pipes that are buried underground and supply fuel gas to consumers (general households or business establishments). In addition, when repairing the gas pipe, a bypass pipe that bypasses the repair section is provided so as not to stop the gas supply (Patent Document 1, FIG. 10). The pipeline is removed (Patent Document 1, FIG. 13).

  In the gas pipe after the bypass pipe is removed, a hole drilled for connecting the bypass pipe remains. A seal plug (Patent Document 1, FIG. 11 and FIG. 12) is inserted into this hole, and a repair saddle (Patent Document 1, FIG. 6 and FIG. 7) is fused and repaired from above.

  The seal plug is a closing member that is inserted into a hole formed in the gas pipe and temporarily closes the hole, and is made of an elastic material such as sponge or a material that is not easily deformed (rigid). There is a type in which an O-ring is mounted around a stopper (Patent Document 1, paragraph 0018).

  The repair saddle is a sealing member that is fused to the outer peripheral surface of the gas pipe and completely and permanently seals the hole formed in the gas pipe, and is composed of a thermoplastic synthetic resin (for example, polyethylene). . Further, the repair saddle forms a convex portion protruding toward the outer side of the arc at the center of the saddle portion having an arc-shaped cross section so as to be in close contact with the outside of the pipe to be repaired. A heating wire is laid around the recess on the inner side of the saddle portion (side in contact with the tube), and a power supply terminal for energizing the heating wire is provided outside the saddle portion, A part of the saddle portion is melted by electric heating of a heating wire and fused to the gas pipe (Patent Document 1, paragraph 0013).

  In addition, after the repair saddle is fused to the gas pipe, soap water is applied to the joint between the repair saddle and the gas pipe to check for gas leakage between the repair saddle and the gas pipe. The presence or absence of occurrence is confirmed visually.

  In some cases, a service pipe joint or a bypass saddle joint is fused to the gas pipe to connect a branch pipe or a bypass pipe (for example, Patent Document 2). In such a case, it is difficult to remove the service tee joint and bypass saddle joint together with the branch pipe and bypass pipe, so the trunk of the service tee joint and bypass saddle joint is cut under the spigot and remains. A seal plug is inserted into the base portion of the body portion, and a cap is further put on the seal plug so as to be fused.

JP-A-9-49596 JP 2002-071078 A

  However, the conventional method for repairing a gas pipe using a seal plug and a repair saddle has a problem that even if soap water bubbles are not generated, the repair saddle cannot be proved to be completely fused. This is because even if the repair saddle is not completely fused, the gas does not leak if the seal plug is completely closed.

  In addition, since the plugging by the seal plug is temporary, if the repair saddle is not completely fused, the gas leaked from the seal plug will pass through the gap between the repair saddle and the gas pipe as time passes. There was a risk of leaking outside.

  In addition, the situation when sealing and sealing the body of the service tee joint and bypass saddle joint remaining after removing the branch pipe and bypass pipe with a seal plug and cap is the same. It was not possible to confirm on the spot.

  Therefore, there has been a demand for a repair material and a repair method that can confirm whether or not the repair saddle is fused immediately after the repair saddle is fused.

  The present invention has been made to solve these problems. When repairing a synthetic resin pipe using a closing member and a sealing member, whether or not the sealing member and the pipe to be repaired are fused is determined. The present invention provides a closing member, a sealing member, a closing member removal detector, and a synthetic resin pipe repair method that can be easily confirmed.

  An occluding member according to the present invention is a occluding member that is inserted into a tube or a hole drilled in the tube and closes the tube or the hole drilled in the tube. And an outer plug portion having a through hole that communicates with the external space, and an inner plug portion that is made of a magnetic material and is inserted into the through hole to close the through hole.

  Alternatively, it has a spring member attached to the outer peripheral portion of the inner plug portion, and when the inner plug portion is inserted into the through hole of the outer plug portion, the spring member abuts against the inner wall of the through hole. When the inner plug part is removed from the through hole of the outer plug part, the spring member may project in the outer peripheral direction of the inner plug part.

Further , an adhesive may be attached to the outer surface of the inner plug portion , that is, the surface that comes into contact with the atmosphere when inserted into the tube.

The sealing member according to the present invention covers any of the above-described blocking members inserted into a hole made in the synthetic resin tube, covers the synthetic resin tube, covers the hole, and covers the synthetic resin tube. a sealing member to be fused, the the outer circumferential surface permits adhesion of the contact surface of the synthetic resin tube, provided with a inwardly recessed recesses of the contact surface, of the recess of the synthetic resin tube An adhesive is attached to a surface facing the outer peripheral surface.

  An obstruction member removal detector according to the present invention is supported so as to be rotatable about a horizontal axis, has a center of gravity at a position away from the horizontal axis, and has a magnetic pole at a position away from the center of gravity and the horizontal axis. A rotating magnetic body is provided to detect whether or not the inner plug portion of the closing member has been pulled out from the outer plug portion based on the rotation angle of the eccentric rotating magnetic body.

  The occlusion member removal detector includes a container filled with liquid and at least partially transparent, accommodated in the container, supported by the buoyancy of the liquid, and having a center of gravity away from the buoyancy. An eccentric magnetic floating body having a magnetic pole at a position away from the center of gravity and the floating core, and detecting whether or not the inner plug portion of the closing member is pulled out from the outer plug portion according to the posture of the eccentric magnetic floating body It may be.

  In the method of repairing a synthetic resin pipe according to the present invention, a closing member is inserted into a hole formed in the synthetic resin pipe, and the sealing member is placed on the synthetic resin pipe from above the closing member to cover the hole. In the method of repairing a synthetic resin pipe for fusing the sealing member to the synthetic resin pipe, a closing step for inserting the closing member into a hole in the synthetic resin pipe and closing the hole; and A sealing member attaching step of covering the synthetic resin tube with a sealing member from above the blocking member inserted into the hole, and fusing the sealing member to the synthetic resin tube; and from the outside of the sealing member An internal plug portion removing step of applying a magnetic force and pulling out the internal plug portion of the closing member from the through hole with the magnetic force is provided.

  The closing member according to the present invention is made of a magnetic material and includes an inner plug portion that closes the through hole of the outer plug portion. Therefore, after the sealing member is fused to the pipe to be repaired, The fluid in the pipe to be repaired can be introduced into the sealing member by pulling out the part from the through hole. Therefore, it is possible to easily check whether the sealing member and the pipe to be repaired are fused or not.

  The closing member according to the present invention is such that the spring member attached to the outer peripheral portion of the inner plug portion protrudes in the outer peripheral direction of the inner plug portion when the inner plug portion is removed from the through hole of the outer plug portion. It is possible to prevent the inner plug portion pulled out from the through hole from returning to the through hole.

  Further, since the closing member according to the present invention has an adhesive attached to the upper surface of the inner plug portion, the inner plug portion pulled out from the through hole can be held in the recess of the sealing member with the adhesive. it can. Therefore, it is possible to prevent the inner plug portion pulled out from the through hole from returning to the through hole.

  Since the sealing member which concerns on this invention has mounted | worn the adhesive material on the inner surface of a recessed part, the inner plug part pulled out from the through hole can be hold | maintained with the said adhesive material. Therefore, it is possible to prevent the inner plug portion pulled out from the through hole from returning to the through hole.

  The closing member removal detector according to the present invention detects whether or not the inner plug portion of the closing member has been pulled out from the outer plug portion based on the rotation angle of the eccentric rotating magnetic body or the eccentric magnetic floating body. Can be easily confirmed.

  The method for repairing a synthetic resin pipe according to the present invention is to seal the fluid in the pipe to be repaired by fusing the sealing member to the pipe to be repaired and then pulling out the inner plug portion from the through hole by magnetic force. Since it can be introduced into the member, it is possible to easily inspect whether the sealing member and the pipe to be repaired are fused or not.

  Hereinafter, the best mode for carrying out the present invention will be described.

[First Embodiment]
[Occlusion member]
FIG. 1A and FIG. 1B are sectional views showing a conceptual configuration of a closing member according to the present invention. As shown in FIG. 1 (a), the closing member 1 is a plug that is inserted into the hole 3 formed in the gas pipe 2 and hermetically closes the hole 3, and includes an outer plug 4 and an inner plug 5. The The outer plug 4 is made of a non-magnetic material (for example, polyethylene) having airtightness and elasticity, and has a through hole 6 that connects the inner space and the outer space of the gas pipe 2 at the center thereof. The inner plug portion 5 is a plug that is inserted into the through hole 6 and hermetically closes the through hole 6, and is made of a magnetic material (for example, steel) having air tightness. Alternatively, the inner plug portion 5 may be a magnet.

  As described above, since the material of the outer plug 4 has elasticity, the outer surface of the outer plug 4 is in close contact with the inner wall surface of the hole 3 and closes the hole 3 by the elasticity. Further, the inner wall surface of the through hole 6 of the outer plug 4 is in close contact with the inner plug 5 by the elasticity of the material of the outer plug 4 to ensure airtightness.

  The outer plug 4 is held in the hole 3 due to the elasticity of the material, but it can withstand the gas pressure in the gas pipe 2 and at least temporarily (until the sealing member to be described later is completely fused). The shape and the elasticity of the material are selected so as to be retained. The inner plug 5 also withstands the gas pressure in the gas pipe 2 and is at least temporarily held in the through hole 6 and is pulled out from the through hole 6 with a predetermined external force. Select the shape.

  Instead of giving elasticity to the outer plug 4 itself, an elastic sealing material may be interposed between the outer plug 4 and the hole 3 and between the inner plug 5 and the through hole 6. For example, as shown in FIG. 1B, if an O-ring 7 is provided on the outer periphery of the outer plug 4 and an O-ring 8 is provided between the inner plug 5 and the through hole 6, the outer plug 4 is formed of a hard material. be able to. Also in this case, the material of the outer plug 4 must be a nonmagnetic material.

  Moreover, as shown in FIG.1 (b), you may apply | coat the adhesive agent 9 to the upper surface (surface which contacts external air when it mounts | wears with the gas pipe 2) of the inner plug 5 of the closure member 1. FIG. The action of the adhesive 9 will be described later.

[Sealing member]
FIG. 2 is a diagram showing a conceptual configuration of a sealing member according to the present invention, (a) is a side view of the sealing member 10, (b) is a front view, and (c) is a bottom view. (D) And (e) is the front view and side view which show the modification of the sealing member 10. FIG.

  As shown in FIGS. 2A to 2C, the basic structure of the sealing member 10 is the same as that of the conventional sealing member, and the saddle is in close contact with the outer periphery of the gas pipe 2 (not shown in FIG. 2). A cup portion 12 that protrudes from the outer surface of the saddle portion 11 and the saddle portion 11, and a concave portion 13 that accommodates the closing member 1 (not shown in FIG. 2) is formed inside the cup portion 12. Is coated with an adhesive 14.

  A heating wire 15 is laid around the cup portion 12 on the inner surface of the saddle portion 11, and a power supply terminal 16 for energizing the heating wire 15 is attached to the outer surface of the saddle portion 11.

  A thermoplastic synthetic resin (for example, polyethylene) is selected as the material of the sealing member 10, but the same material as the gas pipe 2 (not shown in FIG. 2) to be repaired is desirable.

  In addition, it is sufficient for the sealing member 10 to have the recess 13 and to have a shape in which the edge of the recess 13 is in close contact with the pipe to be repaired, and the saddle portion 11 and the heating wire 15 are not essential components. . For example, instead of the sealing member 10, as shown in FIGS. 2D and 2E, the saddle portion 11 and the heating wire 15 are omitted, and the adhesive 14 is placed inside the concave portion 13 inside the cup portion 12. You may use apply | coated sealing member 10 '.

  Since the sealing member 10 ′ does not include the heating wire 15, a separate heating device is required when the sealing member 10 ′ is fused to the gas pipe 2.

[How to repair synthetic resin pipes]
Next, a procedure for repairing (sealing) the hole 3 of the gas pipe 2 using the closing member 1 and the sealing member 10 will be described with reference to FIG. In general, the repair of the hole 3 of the gas pipe 2 is performed in a state where the fuel gas is passed through the gas pipe 2 (live state), so that the fuel gas in the gas pipe 2 does not flow out to the outside. 3 is carried out with a no-blow bag attached, but the illustration is omitted because it is complicated.

[1] First, the closing member 1 is inserted into the hole 3 to close the hole 3 (FIG. 3A).
[2] Next, the sealing member 10 is put on the gas pipe 2 from the top of the closing member 1 so as to be in close contact with the gas pipe 2 (FIG. 3B).
[3] The heating wire 15 (not shown in FIG. 3) is energized to fuse the sealing member 10 to the gas pipe 2.
[4] A permanent magnet 17 is placed on the cup portion 12 of the repair saddle, and the inner plug 5 of the closing member 1 is pulled out from the outer plug 4 by the magnetic force of the permanent magnet 17 (FIG. 3 (c)). 6 is released. At this time, the inner plug 5 comes into contact with the bottom of the recess 13 and is bonded and held by the adhesive 14 (FIG. 3C).
[5] When the through hole 6 is opened, the fuel gas in the gas pipe 2 flows into the recess 13 of the sealing member 10 through the through hole 6.
[6] Soap water is applied to the joint between the sealing member 10 and the gas pipe 2 to check whether or not fuel gas has leaked.

  Here, the inner plug 5 of the closing member 1 is pulled out from the outer plug 4 by the magnetic force of the permanent magnet 17, but a magnet that can exert a magnetic force on the inner plug 5 so as to pull out the inner plug 5 from the outer plug 4. As long as there is any material and form. Of course, an electromagnet may be used instead of the permanent magnet 17.

  In the above embodiment, the example in which the inner plug 5 pulled out from the outer plug 4 is bonded and held by the adhesive 14 applied to the recess 13 of the sealing member 10 is shown in FIG. 1B. Thus, if the adhesive 9 is applied to the upper surface of the inner plug 5, it is not necessary to apply the adhesive 14 to the recess 13 of the sealing member 10.

  In addition, a substance that functions as an adhesive may be present on the recess 13 of the sealing member 10 or the upper surface of the inner plug 5. For example, instead of the adhesives 9 and 14, a so-called double-sided adhesive tape is applied to the upper surface of the recess 13 or the inner plug 5 of the sealing member 10, and the protective paper of the tape is removed immediately before use to expose the adhesive surface. You may make it do.

[Occlusion member]
Alternatively, instead of the adhesives 9 and 14, the closing member 1 may be provided with a detent that prevents the inner plug 5 pulled out from the outer plug 4 from returning to the through hole 6. For example, as shown in FIG. 4, a “<” shaped spring piece 18 biased so as to open outward is attached around the inner plug 5, and the spring piece 18 is crushed and inserted into the through hole 6 ( FIG. 4 (a)). When the inner plug 5 is pulled out and out of the through hole 6, the spring piece 18 spreads outside, so that the inner plug 5 does not return to the through hole 6 (FIG. 4B).

  In this embodiment, the case where the hole drilled in the tube is closed and sealed has been taken up, but the present invention is not applied only to the repair of the hole drilled in the tube. It can also be applied to the case of closing and sealing the tube. For example, the closing member 1 is inserted into a tubular member such as the trunk of the service Qi joint that remains after the branch pipe has been removed, and the cap is fused from above, and then the inner plug of the closing member 1 is inserted. If 5 is pulled out, it can be confirmed on the spot whether the cap is fused or not. In this case, if an adhesive is attached to the inside of the cap, the pulled out inner plug 5 can be prevented from returning to the through hole 6.

[Second Embodiment]
[Blocking member removal detector]
In the first embodiment, when the inner plug 5 of the closing member 1 is pulled out from the outer plug 4, some sound is generated, so that it can be recognized that the inner plug 5 has been detached from the outer plug 4. However, depending on the environment of the place where the repair work is performed, it may be difficult to confirm that the inner plug 5 has been detached from the outer plug 4 by sound.

  Therefore, if the closing member removal detector 20 as shown in FIG. 5 is used, it can be confirmed that the inner plug 5 has been normally removed from the outer plug 4.

FIG. 5A is a transverse sectional view showing the structure of the closing member removal detector 20, and FIG. 5B is a longitudinal sectional view. 5C and 5D illustrate the operation of the closing member removal detector 20.

Now, as shown in FIGS. 5A and 5B, the closing member removal detector 20 includes a case 21 and a rotating drum 23 that is rotatably supported by the case 21 and rotates freely around the horizontal axis 22. A weight 24 is fixed to the rotary drum 23 so that the center of gravity G of the rotary drum 23 is eccentric with respect to the horizontal axis 22. A magnet 25 is attached to the rotating drum 23 such that the magnetic poles N and S are positioned away from the horizontal shaft 22 and the center of gravity G of the rotating drum 23. A window 26 is opened on the upper surface of the case 21 so that the outer peripheral surface of the rotary drum 23 can be observed from the window 26. Further, the upper half area 23a of the outer peripheral surface of the rotary drum 23 is painted red, and the lower half area 23b is painted white.

  When there is no other magnetic body in the vicinity of the closing member removal detector 20, the rotary drum 23 is balanced in such a posture that the center of gravity G is directly below the horizontal axis 22. Therefore, at this time, from the window 26, an area painted in red on the outer peripheral surface of the rotating drum 23 can be seen.

  Now, the closing member removal detector 20 is placed on the cup portion 12 of the sealing member 10 and used. In a state where the inner plug 5 is inserted into the outer plug 4, the inner plug 5 is located far from the closing member removal detector 20, and thus does not affect the closing member removal detector 20. Therefore, as shown in FIG. 5C, the rotary drum 23 of the closing member removal detector 20 is balanced with the center of gravity G at the bottom. At this time, a red-painted region 23 a on the outer peripheral surface of the rotating drum 23 can be seen from the window 26.

  On the other hand, when the inner plug 5 is pulled out from the outer plug 4, the inner plug 5 approaches the closing member removal detector 20, which affects the closing member removal detector 20. Therefore, as shown in FIG. 5D, the magnet 25 of the rotary drum 23 is attracted to the inner plug 5, and the rotary drum 23 rotates around the horizontal axis 22. At this time, a white-painted region 23 b on the outer peripheral surface of the rotating drum 23 can be seen from the window 26.

  As described above, when the closing member removal detector 20 is placed on the cup portion 12 of the sealing member 10, the inner plug 5 becomes the outer plug 4 due to the difference in the color of the outer peripheral surface of the rotary drum 23 that can be seen from the window 26. It can be determined whether or not the through hole 6 is pulled out.

  Further, a closing member removal detector 27 as shown in FIG. 6 may be used. 6A to 6D are explanatory views for explaining the conceptual configuration and operation of the closing member removal detector 27. FIG.

As shown in FIG. 6A, the closing member removal detector 27 includes a casing 28, a spherical transparent container 29 fixed to the casing 28, and a spherical floating body 30 accommodated in the transparent container 29. . Further, the transparent container 29 is filled with liquid, and the floating body 30 is held by the buoyancy received from the liquid and freely rotates in the transparent container 29. The type of the liquid is not particularly limited, but is a liquid that does not attack the transparent container 29 and the spherical floating body 30, is chemically stable (does not change in quality), and has high transparency (the floating body 30 from the outside of the transparent container 29. To see).

  A weight 31 is fixed to the floating body 30 so that the position of the center of gravity G of the floating body 30 is different from the center B of the floating body 30. In addition, the magnet 32 is attached to the floating body 30 so that the magnetic poles N and S thereof are in positions different from the center of gravity G and the floating core B.

  The closing member removal detector 27 is also placed on the cup portion 12 of the sealing member 10 in the same manner as the closing member removal detector 20. In the state where the inner plug 5 is inserted into the outer plug 4, the inner plug 5 does not affect the closing member removal detector 27. Therefore, as shown in FIG. 6A, the floating body 30 of the closing member removal detector 27. Is balanced with the center of gravity G down.

  On the other hand, when the inner plug 5 is pulled out from the outer plug 4, the inner plug 5 approaches the closing member removal detector 27, so that the magnet 32 is attracted to the inner plug 5 as shown in FIG. 30 rotates and directs the magnet 32 downward.

  The closing member removal detector 27 can also be used when the sealing member 10 is attached to the side of the gas pipe 2 and the cup portion 12 faces sideways. Also in this case, when the inner plug 5 is inserted into the outer plug 4, the inner plug 5 does not affect the closing member removal detector 27. Therefore, as shown in FIG. 6C, the closing member removal detector. 27 floating bodies 30 are balanced with the center of gravity G at the bottom.

  When the inner plug 5 is pulled out from the outer plug 4, the inner plug 5 approaches the closing member removal detector 27, so that the magnet 32 is drawn toward the outer plug 4 as shown in FIG. Rotate and turn magnet 32 to the left.

  In this way, it is detected whether or not the inner plug 5 has been removed from the outer plug 4 due to the difference in the posture of the floating body 30 when the closing member removal detector 27 is placed on the cup portion 12 of the sealing member 10. be able to. Needless to say, if the surface of the floating body 30 is color-coded or marked, the posture of the floating body 30 can be easily recognized from the outside of the transparent container 29.

In the above description of the embodiment, terms such as “gas pipe” and “fuel gas” are simply used, but the present invention is not limited to a so-called city gas (natural gas, methane) supply pipe, but also propane, ethylene, It can be applied to repair materials and repair methods for supply pipes such as acetylene. It can also be applied to repair materials and repair methods for other gas and liquid supply pipes.

It is sectional drawing which shows the notional structure of the obstruction | occlusion member which concerns on this invention. It is a figure which shows the notional structure of the sealing member which concerns on this invention. It is a figure explaining the repair method of the synthetic resin pipe | tube which concerns on this invention. It is sectional drawing which shows the notional structure of the obstruction | occlusion member which concerns on this invention. It is a figure which shows the notional structure and effect | action of the obstruction | occlusion member removal detector which concerns on this invention. It is a figure which shows the notional structure and effect | action of the modification of the obstruction member removal detector which concerns on this invention.

Explanation of symbols

1 Closing member 2 Gas pipe 2
3 hole 4 outer plug 5 inner plug 6 through hole 7 O ring 8 O ring 9 adhesive 10 sealing member 11 saddle part 12 cup part 13 recess 14 adhesive 15 heating wire 16 power terminal 17 permanent magnet 18 spring piece 20 closing member Removal detector 21 Case 22 Horizontal shaft 23 Rotating drum 24 Weight 25 Magnet 26 Window 27 Closure member removal detector 28 Casing 29 Transparent container 30 Floating body 31 Weight 32 Magnet

Claims (7)

In a closing member that is inserted into a tube or a hole drilled in the tube and closes the tube or the hole drilled in the tube,
An outer plug portion made of a non-magnetic material and having a through hole that communicates the internal space and external space of the tube;
A closing member comprising an inner plug portion configured of a magnetic material and inserted into the through hole to close the through hole. A spring member mounted on the outer peripheral portion of the inner plug portion;
When the inner plug portion is inserted into the through hole of the outer plug portion, the spring member abuts against the inner wall of the through hole,
The closing member according to claim 1, wherein when the inner plug portion is detached from the through hole of the outer plug portion, the spring member protrudes in an outer peripheral direction of the inner plug portion. The outer surface of the inner plug part, namely closure member according to claim 1 or claim 2, characterized in that wearing the adhesive to the surface in contact with the atmosphere when inserted into the tube. The closure member according to any one of claims 1 to 3 is inserted into a hole formed in the synthetic resin pipe, and the synthetic resin pipe is covered with the cover from the top, and the synthetic resin pipe is covered. A sealing member fused to
With a close contact surface that can be in close contact with the outer peripheral surface of the synthetic resin tube, and a recess recessed inside the close contact surface ,
A sealing member, wherein an adhesive is attached to a surface of the recess facing the outer peripheral surface of the synthetic resin tube. Supported to rotate around the horizontal axis,
The center of gravity is located away from the horizontal axis,
An eccentric rotating magnetic body having a magnetic pole at a position away from the center of gravity and the horizontal axis,
The occlusion member removal characterized by detecting whether or not the inner plug portion of the occlusion member according to any one of claims 1 to 3 is pulled out from the outer plug portion according to a rotation angle of the eccentric rotating magnetic body. Detector. A container filled with liquid and at least partially transparent;
Accommodated inside the container and supported by the buoyancy of the liquid;
The center of gravity is away from the buoyancy,
An eccentric magnetic floating body having a magnetic pole at a position away from the center of gravity and the floating core,
4. A closing member removal detector for detecting whether or not the inner plug portion of the closing member according to claim 1 has been pulled out from the outer plug portion according to the posture of the eccentric magnetic floating body. . A closing member is inserted into a hole made in the synthetic resin tube, and the sealing member is put on the synthetic resin tube from above the closing member to cover the hole, and the sealing member is fused to the synthetic resin tube. In the method of repairing synthetic resin pipes,
A closing step of closing the hole by inserting the closing member according to any one of claims 1 to 3 into the hole of the synthetic resin tube;
A sealing member attaching step of covering the synthetic resin tube with a sealing member from above the closing member inserted into the hole of the synthetic resin tube, and fusing the sealing member to the synthetic resin tube;
A method of repairing a synthetic resin pipe, comprising: a step of removing the inner plug portion of the sealing member by applying a magnetic force from the outside of the sealing member and pulling out the inner plug portion of the closing member from the through hole with the magnetic force.

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