JP3410544B2 - Repair members for existing pipes, their manufacturing methods, and repair methods for existing pipes - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a repairing member for repairing an existing pipe such as a sewer pipe, a manufacturing method of the repairing member, and a repairing method using the repairing member.

[0002]

2. Description of the Related Art Existing pipes such as sewer pipes may be cracked or the seams may separate due to earthquakes or ground subsidence. In addition, strength may decrease due to long-term use and cracking may occur. If the existing pipe is damaged in this way, the amount of treated water will increase due to the groundwater and the like that infiltrate from the damaged portion, which will impose a heavy burden on the sewage treatment facility. However, exchanging existing pipes with new ones is generally a big work such as excavating a road, which is not preferable because it is also restricted by traffic conditions.

Therefore, conventionally, damaged existing pipes have been repaired at their positions. For example, a hose lining method is known as a method of repairing or reinforcing an existing pipe without excavating it. In this hose lining method, one end of the seal hose is fixed in the manhole at one end position of the existing pipe, and the seal hose is inserted into the pipe while being inverted by pressurizing with compressed air. Then, during reversal insertion, steam is supplied into the thermohose inserted into the seal hose to heat the seal hose, and the curable resin applied to the outer peripheral surface of the seal hose is cured to be integrated with the inner peripheral surface of the existing pipe. After that, both ends are cut off in two manholes on both sides, and the end surface of the existing pipe is treated with a sealing material or the like to finish.

Further, in Japanese Patent Laid-Open No. 1-279197, a repair sleeve made of a shape memory resin is deformed and inserted into an existing pipe, and then the shape is restored to enable repair without using a curable resin. The construction method is described.

[0005]

FIG. 10 is a sectional view showing the structure of the sewer pipe. The sewer pipe is composed of a main pipe 100 buried under the road, and a sewage masu 200 installed in a private area and an attachment pipe 101 connecting the main pipe 100. Here, the inner diameter of the mounting pipe 101 is about 150 mm, and has a length of about 3 m. Further, the main pipe 100 has an inner diameter of about 300 mm. The mounting pipe 101 is inserted into a hole formed in the main pipe 100, and the seam is sealed with mortar or the like.

In such a sewer pipe, the mounting pipe 1
01 is cracked, the mounting pipe 101 and the main pipe 100
When the seam is damaged or infiltration of groundwater or the like occurs, since the diameter of the mounting pipe 101 is small and there is no manhole, it is difficult to use the above-described hose lining method using a manhole. Even in the construction method in which a repair sleeve made of a shape memory resin is inserted to recover the shape, the end opposite to the insertion port (the side of the dirty water 200) into the mounting pipe 101 is connected to the main pipe 100. Therefore, the insertion length of the repair sleeve must be determined in consideration of shortening the shape recovery. Therefore, due to error, the mounting pipe 10
In some cases, part of 1 may remain unrepaired. Furthermore, even if a repair sleeve is inserted long enough to project into the main pipe 100 after the shape is recovered, the mounting pipe 101 and the main pipe 10 are inserted in the main pipe 100.
In order to perform the finishing process to seal the seam with 0,
It is necessary to perform construction on the main 100 side using a self-propelled vehicle or the like. However, when the inner diameter of the main pipe 100 is small, it may be difficult to use a self-propelled vehicle or the like.

Therefore, in the past, a simple construction method for repairing the joint between the main pipe 100 and the mounting pipe 101 as described above has not been established, and a large number of man-hours for excavating the road are spent for replacement work. Is the current situation. The present invention has been made in view of such circumstances, and an object thereof is to easily repair an existing pipe having a small diameter that is difficult to repair by a hose lining method or the like without performing excavation work or the like. .

[0008]

SUMMARY OF THE INVENTION A repair member for an existing pipe according to the present invention, which solves the above-mentioned problems, is a tubular portion which is engaged with the inner peripheral surface of the existing pipe and an end surface of the existing pipe which is formed at one end of the tubular portion. It consists of a flange that is locked, and the flange is made of shape memory resin.
Formed to memorize the shape of the flange part,
Both ends on the flange side are made of shape memory resin.
The cylindrical shape with an outer diameter greater than the inner diameter of the installation pipe is memorized, and the
The shape recovery temperature is higher than the shape recovery temperature of the flange.
Characterized in that that.

The tubular portion preferably has a length substantially equal to the length of the existing pipe and is capable of expanding its diameter. With this configuration, the diameter of the tubular portion can be increased in the existing pipe, so that the inner peripheral surface of the existing pipe can be pressed against the existing inner pipe, and the inner peripheral surface of the existing pipe can be repaired. For expanding the diameter, for example, a method of forming an expandable resin and introducing pressurized air and adhering and fixing it to the inner peripheral surface of an existing pipe, forming a tubular part from a thermoplastic resin, softening it with hot air, etc., and then expanding it Methods etc. can be used.

It is also preferable that at least the end portion of the tubular portion on the side of the flange portion is formed of a shape memory resin so that the tubular shape can be memorized according to the inner diameter of the existing pipe. In this way, when the shape is restored, the tubular portion is reliably pressed against the inner peripheral surface of the existing pipe, and repair and fixing can be performed reliably. Further, when the tubular portion is also formed of the shape memory resin, the shape recovery temperature of the tubular portion may be set higher than the shape recovery temperature of the flange portion. By doing so, the shape of the flange portion can be restored by first heating to a low temperature, and the flange portion can be reliably engaged with the end surface of the existing pipe by pulling the repair member from the opposite side. Then, after that, by heating to a high temperature to restore the shape of the tubular portion and press-contacting the inner peripheral surface of the existing pipe, it is possible to reliably engage the flange portion with the end surface of the existing pipe without being affected by dimensional errors and the like. it can.

It is desirable that the flange portion has a soft seal member on the surface on the cylinder portion side. As a result, the seal member surely comes into close contact with the end surface of the existing pipe, and the sealing performance is improved.
The method for manufacturing a repair member according to the present invention for obtaining the repair member comprises a tubular portion locked to the inner peripheral surface of the existing pipe and a flange portion formed at one end of the tubular portion and locked to the end surface of the existing pipe. At least the flange portion of the repair member is molded with a shape memory resin into a shape that can be locked to the end surface of the existing pipe, and a step of obtaining the repair member in which the shape of the flange portion is memorized, and at least the flange portion can be inserted into the existing pipe And a step of deforming the shape.

Furthermore, in the repairing method of the present invention using the repairing member, the repairing member deformed so that it can be inserted into the existing pipe is installed in the existing pipe until the flange portion is in a position where it can be engaged with one end face of the existing pipe. It is characterized by performing an insertion step of inserting into the tube and a recovery step of heating the flange portion to a shape recovery temperature or higher to recover the shape and engage with the one end surface of the existing pipe.

[0013]

According to the present invention, there is provided a tubular portion that is locked to the inner peripheral surface of the existing pipe and a flange portion that is formed at one end of the tubular portion and that is locked to the end surface of the existing pipe, and at least the flange portion is a shape memory resin. The repair member is formed by storing the shape of the flange portion. In this repair member, at least the flange portion is deformed into an insertion shape having a sectional shape smaller than the sectional shape of the pipeline of the existing pipe. Such deformation can be achieved by heating and softening the repair member and stretching it in the length direction, changing the cross-sectional shape in the radial direction, or both.

The repair member having an insertion shape is inserted from one end of the existing pipe to be repaired, and the flange portion is located at a position where it can be engaged with the other end surface of the existing pipe. When one end of the existing pipe is connected to, for example, a sewage tank, the repair member can be easily inserted from the one end opening exposed in the sewage tank. Further, it can be easily determined whether or not the position is engageable with the other end surface by comparing the insertion length of the repair member and the length of the existing pipe. Alternatively, enter a TV camera, survey vehicle, etc. near the joint of the main mounting pipe to monitor TV.
You can also check it on the screen.

In this state, the repair member is heated to at least the shape recovery temperature of the flange portion. This heating can be easily performed by flowing a heating medium such as hot air or steam into the repair member or between the repair member and the inner peripheral surface of the existing pipe. As a result, at least the flange portion of the existing pipe is restored to the shape that can be engaged with the end surface of the existing pipe. In this case, it is unknown whether the flange portion engages or disengages with the existing pipe end surface, but it is possible to easily engage the flange portion with the existing pipe end surface by, for example, pulling the repair member from one end side of the inserted side. You can

Then, the existing pipe end face portion can be repaired by fixing the engagement state of the flange portion by a method such as fixing the tubular portion by some means. For example, at least the end of the cylinder on the flange side is also made of shape memory resin, and the shape of the existing pipe is stored in a shape having an outer diameter larger than the inner diameter of the existing pipe. At the same time as or after the engagement of the flange portion with the end surface of the existing pipe. As a result, at least the flange-side end of the tubular portion is pressed against the inner peripheral surface of the existing pipe, and is fixed at that position by the pressure contact force.

Further, it is preferable that the tubular portion has a length substantially equal to that of the existing pipe, and the tubular portion repairs the inner peripheral surface of the existing pipe. Therefore, for example, it is desirable that the tubular portion is formed of an inflatable material, and the flange portion is engaged with the existing pipe and then expanded with pressurized air or the like to be brought into pressure contact with the inner peripheral surface of the existing pipe. In order to fix the expanded shape, it may be bonded to the inner peripheral surface of the existing pipe with an adhesive or the like, or the expanded shape can be fixed only by cooling when it is expanded after being thermally softened.

More preferably, the entire tubular portion is formed of a shape memory resin, and the shape is remembered in a shape having an outer diameter larger than the inner diameter of the existing pipe. With this configuration, the tubular portion expands and is pressed against the inner peripheral surface of the existing pipe by recovering the shape of the tubular portion, so that the inner peripheral surface of the existing pipe can be repaired. However, if the expanded tubular portion is pressed against the existing pipe, it may be difficult for the repair member to move within the existing pipe, and the flange may be fixed in the unengaged state.
Therefore, it is desirable to recover the shape of the flange portion first while the shape of the tubular portion is not recovered. In this way, the repair member can move within the existing pipe, so the flange part can be securely engaged with the end face of the existing pipe by pulling it from the opposite side or pushing it in with a jig sent from the main pipe side. Can be made. After that, when the shape of the tubular portion is restored, the tubular portion is pressed against and fixed to the inner peripheral surface of the existing pipe, the inner peripheral surface is repaired, and the engagement state between the flange portion and the existing pipe is fixed.

In order to recover the shape of the flange portion before the tubular portion, for example, when repairing the mounting pipe 101 shown in FIG. 10, hot air is supplied into the main pipe 100 so that the main pipe 100 starts from the tip of the mounting pipe 101. The flange portion exposed inside can be preferentially heated, and the flange portion can be recovered in shape first. In this case, in order to prevent the heating of the tubular portion, it is also preferable to insert a heat-insulating filling material into the repair member if possible.

Further, it is desirable that the shape recovery temperature of the tubular portion is higher than the shape recovery temperature of the flange portion. In this case, if first heated to a low temperature, only the flange portion recovers its shape and the tubular portion maintains the deformed state. Therefore, since the repair member can move within the existing pipe, if the flange is brought to the engaging position by pulling from the opposite side and then heated to a high temperature, the shape of the tubular part recovers and the state of the existing pipe comes into pressure contact. Fixed.

In this way, the one end surface and the inner peripheral surface of the existing pipe are repaired. Finally, a step of treating the end of the repair member is performed on the other end surface (insertion side) of the existing pipe. This is, for example, a method in which the protruding portion of the repair member is cut off, a shape in which the shape that can be engaged is memorized similarly to the flange portion is remembered, the shape is recovered after insertion, and the other end surface of the existing pipe is engaged, or a seal. It can be performed by a method of applying a material.

In the engagement between the flange portion and the end surface of the existing pipe, the sealability may be poor by simply making pressure contact. Therefore, it is desirable to have a seal member on the surface of the flange portion that contacts the existing pipe end surface. Examples of this seal member include rubber and an adhesive material, and the seal member is further interposed between the flange portion and the existing pipe end surface to further improve the sealability, and the joint between the sewer main pipe and the mounting pipe, etc. Infiltration of water can be effectively prevented.

[0023]

EXAMPLES The present invention will be specifically described below with reference to examples. In addition, the following embodiment is a mounting pipe 101 for a sewer pipe shown in FIG.
The repair method and the repair member used therefor. (Embodiment 1) FIG. 2 shows a repair member used in Embodiment 1.
Note that FIG. 2 shows the cross-sectional shape after the shape is recovered. The repair member 1 is composed of a tubular portion 10 and a flange portion 11 that is curved in a spherical shape.

First, a polyurethane resin (“Diary” manufactured by Mitsubishi Heavy Industries, Ltd.) is used as a shape memory resin, and a cylindrical tubular portion 10 is formed by injection molding, and is projected radially outward from the one end surface of the tubular portion 10 in a brim shape. The repair member 1 including the flange portion 11 was formed. In this repair member, the tubular portion 10 is configured to be slightly larger than the inner diameter of the mounting pipe 101. The flange portion 11 has a shape along the end surface of the attachment pipe 101 and the inner peripheral surface of the main pipe 100 at the joint portion between the attachment pipe 101 and the main pipe 100. The shape-memory resin used has a shape-memory temperature of 170 ° C. and a shape-recovery temperature of 50 ° C., and the shape is stored in the repair member 1 by cooling after injection molding.

Next, while the repair member 1 is immersed in hot water at 70 ° C., the flange portion 11 is deformed and extended into a tubular shape coaxial with the tubular portion 10, and has an outer diameter smaller than the inner diameter of the mounting pipe 101. Inserted shape. This is attached to a jig (not shown) that detachably holds, and the flange portion 11 side is inserted into the inside of the mounting pipe 101 from the opening of the mounting pipe 101 that opens to the dirty water tank, and as shown in FIG. 11 was inserted into the main pipe 100 to the position where it projects.

In this state, hot air of 60 ° C. was supplied from the main pipe 100 side to first restore the shape of the flange portion 11 only. Next, while holding it with a jig (not shown), drainage 20
Pulled to the 0 side, the end surface of the mounting pipe 101 and the main pipe 100
While being in contact with the inner peripheral surface of No. 2, hot air at 60 ° C. was supplied from the opening of the mounting pipe 101 on the side of the dirty water 200 to restore the shape of the remaining cylindrical portion 10. That is, as shown in FIG. 1, the flange portion 11 covers and seals the end surface of the mounting pipe 101 and the inner peripheral surface of the main pipe 100, and the tubular portion 10 is pressed against the inner peripheral surface of the end portion of the mounting pipe 101 for repair. The member 1 is a mounting pipe 101
It is fixed integrally with. Then, by removing the jig from the inside of the mounting pipe 101, the repair of the joint portion between the mounting pipe 101 and the main pipe 100 is completed.

In this embodiment, the tubular portion 10 is also made of a shape memory resin and is integrally formed with the flange portion, but the tubular portion 10 is made of a simple thermoplastic resin. Can also In this case, the flange portion 11 is attached to the end surface of the mounting pipe 101 and the main pipe 100 in the same manner as above.
In the state of being in contact with the inner peripheral surface of, the compressed air is supplied while heating the cylindrical portion 10 to expand the cylindrical portion 10. As a result, the tubular portion 10 is pressed against the inner peripheral surface of the end portion of the mounting pipe 101, and the repair member is fixed integrally with the mounting pipe 101. (Second Embodiment) In the first embodiment, the mounting pipe 101 and the main pipe 1
Although the seam portion of No. 00 was repaired, the inner peripheral surface of the mounting pipe 101 can be repaired as follows.

A styrene-butadiene copolymer resin ("Asmer" manufactured by Asahi Kasei Co., Ltd.) was used as the shape memory resin.
The cylindrical first member 2 (see FIG. 4) having an outer diameter slightly larger than the inner diameter of the mounting tube 101 was formed by extrusion molding at 50 ° C. The shape-memory resin has a shape-memory temperature of 120 ° C. and a shape-recovery temperature of 75 ° C., and the shape is memorized in the first member 2 by cooling after extrusion molding.

On the other hand, a polyurethane resin ("Diary" manufactured by Mitsubishi Heavy Industries, Ltd.) is used as the shape memory resin, and a cylindrical tubular portion 30 is formed by injection molding, and a flange is radially outward from one end surface of the tubular portion 30. The second member 3 (see FIG. 4) including the flange portion 31 protruding in a line was formed. The outer diameter of the tubular portion 30 of the second member 3 is slightly larger than the inner diameter of the first member 2, and the flange portion 31 includes the end surface of the attachment pipe 101 and the main pipe 100 at the joint portion between the attachment pipe 101 and the main pipe 100. It has a shape along the inner peripheral surface. The shape-memory resin has a shape-memory temperature of 170 ° C. and a shape-recovery temperature of 50 ° C., and the second member 3 remembers this shape by cooling after injection molding.

Next, the first member 2 was stretched while being immersed in warm water of 90 ° C. to have an insertion shape having an outer diameter smaller than the inner diameter of the mounting pipe 101. The second member 3 is immersed in hot water at 70 ° C. to deform the flange portion 31 into a tubular shape coaxial with the tubular portion 30 and extend the outer diameter to be smaller than the inner diameter of the deformed first member 2. did. And the tubular portion 3 of the second member 3
0 was inserted from the end surface of the first member 2, and only the tubular portion 30 was heated to 60 ° C. with hot air. As a result, only the tubular portion 30 tries to recover to the original shape, presses against the inner peripheral surface of the inserted first member 2, and as shown in FIG.
A repair member integrally formed with the member was formed.

By using the repair member having such an insertion shape, the second member 3 is inserted into the mounting pipe 101 from the opening of the mounting pipe 101 which opens to the sewage mist 100, with the flange 31 being the main pipe 100. The position to project inward. At this time, if there is a step between the sewage tank 100 and the mounting pipe 101, it is advisable to insert the repair member while inserting it while heating and deforming it in a temperature range in which the shape recovery speed is slow and the shape can be deformed.

In this state, steam is supplied into the repair member from the side of the dirty water 200, and the repair member is heated to 60 ° C. As a result, the second member 3 reaches the shape recovery temperature or higher, but
Member 2 is below the shape recovery temperature. Therefore, only the second member 3 recovers its shape, and the flange portion 31 is formed in the main pipe 100. Since most of the tubular portion 30 is inside the first member 2, the shape recovery is restricted by the first member 2 (see FIG. 6).

Next, when the repair member is pulled from the side of the dirty water 200 in the direction of the arrow in FIG. 6, the movement of the repair member is restricted with the flange portion 31 in contact with the end surface of the mounting pipe 101 and the inner peripheral surface of the main pipe 100. Stop pulling at that position. Then, steam is supplied into the repair member to heat the repair member to 80 ° C. As a result, both the first member 2 and the second member 3 reach the shape recovery temperature or higher, and the first member 2 is pressed against the inner peripheral surface of the mounting pipe 101. Further, the second member 3 is pressed against the inner peripheral surface of the first member 2 having the expanded diameter of the tubular portion 30 (see FIG. 7). Therefore, the repair member is pressed into contact with the mounting pipe 101 by the shape recovery and is integrally connected.

The shape of the first member 2 is preferably recovered gradually from the second member 3 side at substantially constant intervals. Then, the end portion of the first member 2 of the repair member protruding from the opening of the mounting pipe 101 on the side of the dirty water 200 is cut off, and the tubular portion 3 of the second member 3 is deformed into the insertion shape.
Insert 0 into the repair member. Then, the steam is supplied to heat the inserted second member 3 to 60 ° C. so that the shape of the second member 3 is recovered.
The sewage masu 200 comes into contact with the end surface of the tub 200, and the tubular portion 30
It is fixed in a state of being pressed against the inner peripheral surface of the member 2.

Therefore, the repaired mounting tube 101 thus obtained
In the above, the first member 2 covers the entire inner peripheral surface, and the flange portions 31 of the second member 3 abut on the inner peripheral surfaces of the main pipe 100 and the sewage tank 200 around both ends to seal. (Embodiment 3) The repair member of this embodiment is shown in FIG. 8 in a state after the shape is recovered. This repair member has the same configuration as that of the second embodiment except that the coupling state of the tubular portion 4 (first member) and the flange portion 5 (second member) is different.

In this embodiment, first, the cylindrical portion 4 is formed by extrusion molding.
To form. The extruded shape of the tubular portion 4 is stored by the heat during extrusion molding. Next, one end of the tubular portion 4 is placed in a mold for molding the flange portion 5, and the flange portion 5 is formed by injection molding. The flange portion 5 is formed on the outer peripheral surface of the end portion of the tubular portion 4. As a result, the tubular portion 4 and the flange portion 5 are integrally joined, and a repair member as an integrally molded product is obtained. An adhesive may be used when the joining property between the tubular portion 4 and the flange portion 5 is poor. And Example 2
The mounting tube 101 can be repaired in the same manner as in. (Embodiment 4) In the above embodiment, the repair member was formed only from the shape memory resin, but as shown in FIG. 9, for example, the surface of the flange portion 51 facing the end surface of the mounting pipe 101, that is, the flange portion at the time of the insertion shape It is also preferable to integrally provide a seal member 52 made of a viscoelastic body such as butyl rubber or urethane on the outer peripheral surface of 51 by adhesion or the like.

With this configuration, when only the flange portion 51 is pulled after the shape is recovered, the seal member 52 is attached to the mounting pipe 10.
Since the one end face and the inner peripheral surface of the main pipe 100 are in close contact with each other, the sealability is further improved, and the deformation of the seal member 52 absorbs the error in the pulling position, thereby preventing the sealability from being deteriorated due to insufficient pulling. Further, although not shown, it is also preferable to form a barrier layer such as a vinyl chloride resin coating (which improves durability of the existing pipe after repair) on the inner peripheral surface of the repair member.

[0038]

[Effects of the Invention] That is, according to the repair member of the present invention and the method for repairing an existing pipe using the repair member, at least one end side of the existing pipe can be reliably repaired to the end face without excavation, and the man-hours are increased. Can be greatly reduced. Further, the repair member and the existing pipe can be firmly adhered to each other without using an adhesive or the like. Therefore, compared with the conventional repairing method, the cost and the period required for repairing can be greatly reduced.

According to the repair member manufacturing method of the present invention, the repair member used in the repair method can be manufactured easily and stably.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an existing pipe and a repairing member after repairing in a repairing method according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a repairing member used in a repairing method according to an embodiment of the present invention in a shape-recovered state.

FIG. 3 is a cross-sectional view showing a state in which a repair member deformed in the repair method of one embodiment of the present invention is inserted into an existing pipe.

FIG. 4 is a cross-sectional view showing a configuration of a repair member used in a repairing method according to a second embodiment of the present invention in a shape recovery state.

FIG. 5 is a cross-sectional view showing a state in which a repair member is deformed in the repairing method according to the second embodiment of the present invention.

FIG. 6 is a cross-sectional view showing a state in which only the engaging portion has been recovered in shape after inserting the repair member into the existing pipe in the repair method of the second embodiment of the present invention.

FIG. 7 is a cross-sectional view of an existing pipe and a repairing member after repairing in the repairing method according to the second embodiment of the present invention.

FIG. 8 is a cross-sectional view showing a repairing member used in a repairing method according to a third embodiment of the present invention in a shape-recovered state.

FIG. 9 is a sectional view showing a repairing member used in a repairing method according to a fourth embodiment of the present invention in a shape-recovered state.

FIG. 10 is an explanatory diagram showing a cross section of a sewer pipe structure.

[Explanation of symbols]

1: Repair member 2: First member 3: Second member 10: Tube portion 11: Flange portion 100: Sewer main pipe (existing pipe) 101: Mounting pipe (existing pipe)

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsumi Nakamura 1-7-3 Kamigaga, Setagaya-ku, Tokyo Within Kansei Industrial Co., Ltd. (72) Inventor Shuji Miura 3-6 Nihonbashimotocho, Chuo-ku, Tokyo Nisso Shoji Co., Ltd. (72) Inventor Isao Natsuhori 3600 Amigazu, Oita, Komaki City, Aichi Prefecture Tokai Rubber Industry Co., Ltd. (72) Inventor, Shuichi Takahashi Komaki City, Aichi Pref. No. 1 Tokai Kasei Kogyo Co., Ltd. (56) Reference JP 6-15738 (JP, A) JP 1-279197 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) ) F16L 41/00-55/16 F28F 11/00-19/06

Claims (6)

(57) [Claims] 1. A cylindrical portion that is locked to an inner peripheral surface of an existing pipe, and a flange portion that is formed at one end of the cylindrical portion and that is locked to an end surface of the existing pipe, the flange portion being a shape memory resin. Formed from
The shape of the flange is memorized,
Both ends of the flange portion are made of shape memory resin.
A tubular shape having an outer diameter larger than the inner diameter of the existing pipe is stored,
The shape recovery temperature of the cylinder is lower than the shape recovery temperature of the flange.
A repairing member for existing pipes, which is characterized by high temperatures . 2. A repair member comprising at least the flange portion of a tubular portion locked to the inner peripheral surface of an existing pipe and a flange portion formed at one end of the tubular portion and locked to the end surface of the existing pipe. A step of molding a shape memory resin into a shape that can be locked to the end surface of the existing pipe to obtain a repair member that remembers the shape of the flange portion, and at least deforming the flange portion into a shape that can be inserted into the existing pipe A method of manufacturing a repair member for an existing pipe, which comprises: 3. A tubular portion that is locked to the inner peripheral surface of an existing pipe and a flange portion that is formed at one end of the tubular portion and that is locked to the end surface of the existing pipe, at least the flange portion having a shape memory. Inside the existing pipe, a repair member made of resin, in which the shape of the flange is memorized, and which has been deformed so that it can be inserted into the existing pipe, is positioned until the flange can engage with one end surface of the existing pipe. A repairing method for an existing pipe, which comprises sequentially performing an inserting step of inserting into the tube and a recovering step of heating the flange portion to a shape recovering temperature or higher to recover the shape and engaging with one end surface of the existing tube. 4. A tubular portion locked to the inner peripheral surface of an existing pipe and a flange portion formed at one end of the tubular portion and locked to the end surface of the existing pipe, at least the flange portion having a shape memory. Inside the existing pipe, a repair member made of resin, in which the shape of the flange is memorized, and which has been deformed so that it can be inserted into the existing pipe, is positioned until the flange can engage with one end surface of the existing pipe. Insert step of inserting into the inner wall of the existing pipe, and a recovery step of heating the flange portion to a shape recovery temperature or higher to recover the shape and engaging with one end surface of the existing pipe. A repairing method for an existing pipe, which is characterized by sequentially performing a diameter expansion step for fixing the state of the lever. 5. The shape part is made of a shape memory resin so that at least the end part of the cylinder part on the flange part side has a larger outer diameter than the inner diameter of the existing pipe, and the diameter expansion step is performed by recovering the shape of the cylinder part. The method for repairing an existing pipe according to claim 4, wherein . 6. The shape recovery temperature of the flange portion is lower than the shape recovery temperature of the tubular portion, and in the recovery step, the shape recovery of the flange portion is performed, and then the repair member is moved in the axial direction of the existing pipe to remove the flange portion. The method for repairing an existing pipe according to claim 5, wherein the method is engaged with one end surface of the existing pipe.