JP6021265B2 - End treatment method for lining material - Google Patents

Description

  The present invention relates to a method for treating an end portion of a lining material, which uses an elastic member to seal the end portion of the lining material lined in a pipeline.

  Conventionally, a lining material has been attached and lined for the purpose of repair or reinforcement to pipelines that are buried almost horizontally in the ground, such as gas pipes, water supply pipes, and sewer pipes. . The end portion of the lining material is subjected to end treatment for preventing fluid from entering from between the end portion of the lining material and the inner surface of the pipe line.

  As an example of the end treatment of the lining material, a cylindrical elastic member made of rubber or elastomer is arranged inside the end of the lining material, and the elastic member is pressed from the inside with a metal ring member, and the lining material There are known methods for sealing the ends of the.

  For example, in Patent Document 1, the elastic member is formed to be slightly smaller than the inner diameter of the pipe, and is installed in the pipe in a state where the diameter is expanded (ie, in a tensile state in the circumferential direction).

JP-A-10-238654

  When an elastic member formed of rubber, elastomer, or the like is used for a long period of time, it deteriorates due to the outflow of plasticizer or the influence of ozone in the atmosphere. Since the conventional elastic member is disposed in a tensile state, such deterioration causes a crack in a direction perpendicular to the tensile direction. Further, when the elastic member is installed in a tensioned state, a force to reduce the diameter is generated in the elastic member, so that the sealing performance tends to be lowered.

  An object of this invention is to provide the edge part processing method of the lining material which can prolong the lifetime of an elastic member.

Means for Solving the Problems and Effects of the Invention

  An end treatment method for a lining material according to a first aspect of the present invention is an end treatment method for sealing an end portion of a lining material lined in a pipeline, and a cylindrical elastic member is provided at the end of the lining material. 1st process to arrange | position, and 2nd process to arrange | position the holding member which presses down the said elastic member from an inner side, The said outer diameter in the state in which the external force is not acting is more elastic than the internal diameter of the said pipe line It is large and is arranged in the pipeline in a state compressed in the circumferential direction.

According to this configuration, since the elastic member is arranged in a compressed state, ozone entering the inside of the elastic member can be reduced as compared with the case where the elastic member is arranged in a tensile state, so that ozone deterioration can be reduced. Even if ozone deterioration or deterioration due to the outflow of plasticizer occurs, cracks are unlikely to occur because they are arranged in a compressed state.
Further, since the elastic member is disposed in a compressed state in the circumferential direction, a force for expanding the diameter is generated in the elastic member. Therefore, the sealing performance can be improved as compared with the case where the elastic member is arranged in a tensile state.

  The edge treatment method for a lining material according to a second aspect of the present invention includes, in the first step, arranging the elastic member inside the edge of the lining material and loosening only one portion of the elastic member. The elastic member is compressed in the circumferential direction by pulling in two places away from the slack in the circumferential direction while pushing the slack from the inner peripheral side.

  According to this configuration, the elastic member can be compressed in the circumferential direction without using a special jig.

  In the edge treatment method for a lining material according to a third invention, an annular rib portion protruding outward is formed on the outer peripheral surface of the elastic member, and in the second step, the rib of the elastic member is formed. The pressing member is pressed against the inner peripheral surface of the portion where the portion is formed.

According to this structure, since the rib part protrudes and is formed on the outer peripheral surface of the elastic member, when the elastic member is installed in a compressed state in the circumferential direction, a gap is formed around the rib part. Since the expansion due to the compression of the elastic member can be released to the gap, the elastic member can be easily compressed. Therefore, the compression rate of the elastic member can be increased, and as a result, the contact surface pressure on the outer peripheral surface of the elastic member can be increased, so that the sealing performance can be improved.
Further, since the contact area can be reduced by bringing the rib portion protruding from the outer peripheral surface of the elastic member into contact with the inner surface of the lining material or the inner surface of the pipe line, the contact surface pressure of the outer peripheral surface of the elastic member can be increased, and the sealing property Can be improved.
Further, by providing the rib portion, the followability of the elastic member with respect to the inner surface of the pipeline can be improved when the inner surface of the pipeline is uneven.

  The edge part processing method for a lining material according to a fourth invention is characterized in that two or more of the rib portions are formed side by side in the axial direction.

  According to this configuration, the adhesion between the elastic member and the inner surface of the lining material or the inner surface of the pipe line can be improved.

  The edge treatment method for a lining material according to a fifth aspect of the present invention is the first step, wherein, in the first step, one of the plurality of rib portions is in contact with the inner surface of the edge of the lining material, and the other The elastic member is arranged such that the rib portion contacts the inner surface of the pipe line.

  According to this configuration, both the contact surface pressure between the elastic member and the inner surface of the lining material and the contact surface pressure between the elastic member and the inner surface of the pipe line can be improved.

  The edge treatment method for a lining material according to a sixth invention is characterized in that, in the second step, the elastic member is compressed in the thickness direction by a compression rate of 10 to 20% by the pressing member.

If the compression ratio in the thickness direction of the elastic member is too small (for example, less than 5%), or if the compression ratio is too large (for example, 30% or more), the elastic member will rebound when used for a long period of time. The power is significantly reduced.
In this invention, since an elastic member is arrange | positioned by the compression rate of 10-20% in the thickness direction, an elastic member can be extended in life.

  In the edge treatment method for a lining material according to a seventh aspect of the invention, the elastic member is mainly composed of nitrile rubber (NBR), and has a durometer A hardness of 60 to 70 according to JIS6253.

When the hardness of the elastic member is too small (for example, when the hardness is less than 50), the elastic member is too soft and difficult to handle. On the other hand, when the hardness is too large (for example, when the hardness is 80 or more), it is difficult to compress the elastic member.
In this invention, since the durometer A hardness of an elastic member is 60-70, workability can be improved.

It is a longitudinal cross-sectional view of the pipe line which implemented the edge part processing method of the lining material which concerns on embodiment of this invention. It is an enlarged view of the edge part vicinity of the pipe line of FIG. FIG. 3 is a sectional view taken along line III-III in FIG. 2. It is a perspective view of an elastic member. It is sectional drawing of an elastic member. It is a perspective view of a ring member. It is a perspective view of the ring member in the state where the wedge-shaped piece and the connecting plate are attached. It is sectional drawing which shows the state just before compressing an elastic member to the circumferential direction. It is sectional drawing which shows the state which compressed the elastic member to the circumferential direction. It is sectional drawing which shows the state which installed the diameter expansion apparatus, after arrange | positioning a ring member on the inner surface of an elastic member. It is a perspective view of a diameter expanding apparatus. It is sectional drawing of a diameter expanding apparatus. It is sectional drawing which shows the state which is compressing the elastic member in the thickness direction with the ring member.

Embodiments of the present invention will be described below.
This embodiment is an example in which the end treatment method for a lining material according to the present invention is applied to seal the end of a lining material 2 lined in an existing gas conduit 1 (hereinafter simply referred to as a pipe 1). It is.

  As shown in FIG. 1, the pipe line 1 has a cylindrical shape and is laid in the ground in a substantially horizontal direction. The inner diameter of the pipe line 1 is, for example, 400 to 750 mm. The lining material 2 has a configuration in which, for example, a hard thermosetting resin layer is laminated on both surfaces of a tubular woven fabric, and the thickness thereof is, for example, 2 to 4 mm. The lining material 2 is bonded to the inner surface of the pipeline 1 with an adhesive (not shown). The end portion of the lining material 2 is disposed at a position away from the end portion 1 a of the pipe line 1 by a predetermined distance.

<End structure of lining material>
First, the end structure of the lining material that has been subjected to end processing will be described. As shown in FIGS. 2 and 3, the end treatment structure of the lining material is composed of a cylindrical elastic member 3 arranged inside the end of the lining material 2 and a metal made arranged inside the elastic member 3. 2 ring members (pressing members) 5. The elastic member 3 is disposed so that the central portion in the axial direction is located at the edge of the lining material 2. The two ring members 5 are respectively arranged inside both end portions of the elastic member 3. The ring member 5 is pressed against the inner peripheral surface of the elastic member 3.

  As shown in FIG. 4, the elastic member 3 has a cylindrical shape, and is formed of an elastic material such as nitrile rubber (NBR) or styrene-butadiene rubber (SBR). The durometer A hardness (measured with a digital hardness meter) in accordance with JIS6253 of the elastic member 3 is 60 to 70, for example.

  As shown in FIG. 5, the elastic member 3 includes a main body 3a having a constant thickness and four ribs 3b protruding outward from the outer peripheral surface of the main body 3a. The axial length of the main body 3 a constitutes the axial length of the elastic member 3. The four rib portions 3b are each annular, and are arranged side by side at intervals in the axial direction. The four rib portions 3b have the same shape (projection height and width). The rib part 3b is provided in the both ends of the axial direction range in which the two ring members 5 are arrange | positioned among the elastic members 3. FIG.

  In the state before the elastic member 3 is installed in the pipe line 1 (in a state where no external force is applied to the elastic member 3), the outer diameter of the main body 3 a is larger than the inner diameter of the pipe line 1. Therefore, the outer diameter of the elastic member 3 is also larger than the inner diameter of the pipe 1, and the elastic member 3 is disposed along the inner surface of the pipe 1 in a compressed state in the circumferential direction. The outer diameter of the elastic member 3 is, for example, a value obtained by adding 2 mm to the inner diameter of the conduit 1 and further adding the thickness of the elastic member 3 (for example, 5 mm).

  The elastic member 3 is disposed in a state compressed by the ring member 5 in the thickness direction. The compression rate in the thickness direction from the state in which the elastic member 3 is arranged on the inner surface of the pipe line 1 in the circumferential direction is preferably 5 to 20%, particularly preferably 10 to 20%.

  FIG. 5 shows an example of the axial length of the elastic member 3, the axial length of the rib portion 3b, and the separation distance of the rib portion 3b in a state where no external force is applied. It is not limited to. In order to prevent gas from passing through the elastic member 3, the thickness of the main body 3a is preferably 2 mm or more. Moreover, in order to make the followable property of the elastic member 3 with respect to the inner surface of the pipe line, the protruding height of the rib portion 3b is preferably 3 mm or more.

  As shown in FIG. 6, the ring member 5 is a plate-like member having a spring elasticity formed in a C shape. The two ring members 5 have slightly different circumferences, but the other configurations are the same. Tapered edges 5 a are formed at both ends in the circumferential direction of the ring member 5. The two tapered edges 5a of the ring member 5 are inclined in opposite directions with respect to the axial direction. Moreover, the taper edge 5a is inclined with respect to the radial direction so that the interval between the taper edges 5a becomes wider toward the inner peripheral side (see FIG. 3).

  As shown in FIG. 7, wedge-shaped pieces 6 are fitted between the tapered edges 5 a at both ends in the circumferential direction of the ring member 5. Both ends in the circumferential direction of the wedge-shaped piece 6 are inclined at substantially the same angle as the tapered edge 5a with respect to the axial direction and the radial direction.

  Further, at both ends in the circumferential direction of the ring member 5, projecting portions 5 b projecting in the circumferential direction from the tapered edge 5 a are formed on the inner circumferential side from the tapered edge 5 a. The protrusion 5b plays a role of preventing the wedge-shaped piece 6 from coming out radially inward. Further, the connecting plate 7 is fixed to the inner peripheral surfaces of both end portions in the circumferential direction of the ring member 5 by screw members.

  Further, a floor plate 4 is disposed between the circumferential end portions of the ring member 5 and the wedge-shaped piece 6 and the inner surface of the elastic member 3 (see FIG. 3). The floor plate 4 is intended to improve slippage when the wedge-shaped piece 6 is inserted, and to keep the crimping force of the insertion portion of the wedge-shaped piece 6 uniform. In addition, in this embodiment, although the circumferential direction edge part of the ring member 5 is located in the lowest end of the ring member 5, the position of the circumferential direction edge part is not limited to this.

<End treatment method for lining material>
Next, the edge part processing method of the lining material 2 is demonstrated.
First, the elastic member 3 is arranged inside the end portion of the lining material 2 lined on the pipe line 1. As described above, since the outer diameter of the elastic member 3 before construction is larger than the inner diameter of the pipeline 1, the elastic member 3 disposed in the pipeline 1 is slackened. As shown in FIG. 8, this slackness is brought to the upper side, and the elastic member 3 is in a state in which only one uppermost portion is slackened. Then, the slack (convex portion) is crushed in the radial direction from the inner peripheral side by a hammer or the like, and at the same time, the two positions separated from the slack by about 45 ° in the circumferential direction are grasped and pulled down. This operation is repeated a plurality of times until there is no looseness. As a result, the elastic member 3 is compressed in the circumferential direction, and as shown in FIG. 9, the two rib portions 3b on one end side in the axial direction of the elastic member 3 are in contact with the inner surface of the lining material 2 over the entire circumference, The two rib portions 3b on the other axial end side of the member 3 are in contact with the inner surface of the pipe line 1 over the entire circumference. Note that the position where the slack is generated may be a position other than the uppermost portion of the elastic member 3.

  Next, as shown in FIG. 10, a ring member (pressing member) 5 is disposed inside the end of the elastic member 3 far from the tube end 1 a. The ring member 5 is disposed so that both end portions in the circumferential direction are located at the lowest end. Further, a floor plate 4 is disposed between the circumferential end portions of the ring member 5 and the elastic member 3.

  Next, the diameter expanding device 10 for expanding the diameter of the ring member 5 is carried into the pipe line 1. As shown in FIGS. 11 and 12, the diameter expansion device 10 includes a shaft member 11, a plurality of arm members 12 radially arranged on the outer periphery of the shaft member 11, and an end portion on the radially outer side of the arm member 12. The connected pressing member 13, driving means (hydraulic cylinder 14 and hydraulic pump 15 (see FIG. 10)) for driving the arm member 12, and four leg members 16 are provided.

  In FIG. 11, the leg member 16 is omitted. Further, the cross-sectional view of FIG. 12 shows only the arm member 12 and the pressing member 13 at the cutting position, and the other arm member 12 and the pressing member 13 are omitted.

  The arm member 12 is composed of two arms 12a and 12b whose end portions are rotatably connected. A radially inner end of the arm 12 a is fixed to the shaft member 11. The radially inner end of the arm 12b is connected to the shaft member 11 so as to be movable in the axial direction. By extending the rod of the hydraulic cylinder 14, the arm 12b moves to the arm 12a side, and the radial length of the arm member 12 increases (expands). The hydraulic cylinder 14 is connected to a manually operated hydraulic pump 15 (see FIG. 10), and is driven by the hydraulic pressure supplied from the hydraulic pump 15.

  The pressing member 13 is swingably connected to the radially outer end of the arm member 12. The pressing member 13 is used for expanding the diameter of the ring member 5 by pressing the ring member 5 from the inner surface. Further, the pressing member 13 is removable from the arm member 12.

  Two leg members 16 are arranged on both front and rear sides of the arm member 12. A roller 16 a for traveling in the pipe line 1 is provided at the tip of the leg member 16.

  Further, the diameter expanding device 10 is supported by a support base 20 (only a part is shown in FIG. 10). The support base 20 can move the diameter expansion device 10 in the pipe line 1 in the pipe axis direction and the direction (vertical and horizontal directions) perpendicular to the pipe axis.

  As shown in FIG. 10, when the diameter expanding device 10 is carried into the pipe 1, the arm member 12 is in a reduced diameter state. Further, the lowermost pressing member 13 is removed from the arm member 12 in advance. Then, the diameter expansion device 10 is arranged so that the pressing member 13 is positioned inside the ring member 5 while adjusting the position and orientation of the diameter expansion device 10 by the support base 20.

  Next, the hydraulic pump 15 is operated while looking at the hydraulic gauge 15a provided in the hydraulic pump 15, and as shown in FIG. 13, the plurality of pressing members 13 are moved in the diameter increasing direction to contact the ring member 5. Then, the ring member 5 is pressed from the inside to expand the diameter. While performing this diameter expansion operation, the wedge-shaped piece 6 is inserted between the tapered edges 5a at both ends in the circumferential direction of the ring member 5.

  When the hydraulic pressure reaches a predetermined pressure and the ring member 5 is firmly pressed against the elastic member 3, the operation of the hydraulic pump 15 is stopped and the diameter expansion of the ring member is completed. Then, the wedge-shaped piece 6 is fitted into the gaps at both ends in the circumferential direction of the ring member 5. Thereafter, the diameter of the arm member 12 is reduced, and the diameter expanding device 10 is moved from the inside of the elastic member 3.

  Next, approximately half of the elastic member 3 on the tube end 1a side is turned over and a sealing agent (not shown) is applied to the end surface of the lining material 2, and then the elastic member 3 is returned to its original position. Thereafter, the ring member 5 is arranged inside the end of the elastic member 3 on the tube end 1 a side, and the diameter expansion and the wedge-shaped piece 6 are inserted in the same manner as the other ring member 5. Through the above steps, the end portion of the lining material 2 is sealed.

  Thereafter, the connecting plate 7 is fixed to the inner peripheral surfaces of the two circumferential end portions of the two ring members 5. By connecting both circumferential ends of the ring member 5 with the connecting plate 7, it is possible to prevent the ring member 5 from being reduced in diameter even when the wedge-shaped piece 6 is displaced.

  According to the lining material edge processing method of the present embodiment described above, the elastic member 3 is disposed in a compressed state, so that the elastic member 3 enters the elastic member 3 as compared with the case where the elastic member 3 is disposed in a tensile state. Since ozone can be reduced, ozone degradation can be reduced. Even if ozone deterioration or deterioration due to the outflow of plasticizer occurs, cracks are unlikely to occur because they are arranged in a compressed state.

  Further, since the elastic member 3 is disposed in a compressed state in the circumferential direction, a force for expanding the diameter is generated in the elastic member 3. Therefore, compared with the case where an elastic member is arrange | positioned in the tension | pulling state, the contact surface pressure of the outer peripheral surface of the elastic member 3 and the inner surface of the lining material 2 or a pipe inner surface can be made high. As a result, the sealing performance at the end of the lining material 2 can be improved.

  Moreover, in this embodiment, after loosening one place of the elastic member 3, the elastic member 3 is pulled by pulling two places away from the slack in the circumferential direction while pushing the slack from the inner peripheral side. Is compressed in the circumferential direction. Therefore, the elastic member 3 can be compressed in the circumferential direction without using a special jig.

  Moreover, in this embodiment, since the rib part 3b protrudes and is formed in the outer peripheral surface of the elastic member 3, when the elastic member 3 is installed in the compression state in the circumferential direction, the rib part 3b and the rib part 3b There is a gap between them. Since the expansion due to the compression of the elastic member 3 can be released to the gap, the elastic member 3 can be easily compressed. Therefore, the compression rate of the elastic member 3 can be increased. Since the compressibility is proportional to the contact surface pressure between the elastic member 3 and the inner surface of the lining material 2 and the inner surface of the pipe line, increasing the compressibility can increase the contact surface pressure and improve the sealing performance. .

  Moreover, in this embodiment, since the front end surface of the rib part 3b contacts with the inner surface of the lining material 2, and the pipe inner surface, compared with the case where the rib part 3b is not provided, the elastic member 3 and the inner surface of the lining material 2 In addition, the contact area with the pipe inner surface can be reduced. Therefore, since the contact surface pressure between the elastic member 3 and the inner surface of the lining material 2 and the inner surface of the pipe line can be increased, the sealing performance can be improved.

  Further, by providing the rib portion 3b, the followability of the elastic member 3 with respect to the inner surface of the conduit can be improved when the inner surface of the conduit is uneven.

  In the present embodiment, the elastic member 3 is provided with four rib portions 3b. A part of the four rib portions 3b is brought into contact with the inner surface of the lining material 2, and the remaining rib portions 3b are attached. The contact surface pressure between the elastic member 3 and the inner surface of the lining material 2 and the contact surface pressure between the elastic member 3 and the inner surface of the pipe line can be improved because they are brought into contact with the inner surface of the pipe line 1.

  Moreover, in this embodiment, the two rib parts 3b are provided in the axial direction range in which the two ring members 5 are arrange | positioned among the elastic members 3, respectively. If only one rib portion 3b is provided in the axial range in which the ring member is disposed in the elastic member 3, the ring member may be inclined, but in this embodiment, the ring member 5 is disposed. Since the two rib portions 3b are provided in the axial range, the inclination of the ring member 5 can be prevented.

When the compressibility in the thickness direction of the elastic member 3 is too small (for example, less than 5%), the contact pressure between the elastic member 3 and the inner surface of the lining material 2 and the inner surface of the pipe line 1 is low, so that the sealing performance is lowered. At the same time, when used for a long time, the repulsive force of the elastic member 3 decreases, so that the sealing performance further decreases. On the other hand, when the compressibility in the thickness direction of the elastic member 3 is too large (for example, 30% or more), the sealing property immediately after construction is high, but the repulsive force of the elastic member 3 disappears when used for a long time. For this reason, the sealing performance is lowered.
In the present embodiment, by disposing the elastic member 3 in the thickness direction at a compression rate of 10 to 20%, the elastic member 3 can be extended in life and high sealing performance can be maintained for a long period.

When the hardness of the elastic member 3 is too small (for example, when the hardness is less than 50), the elastic member 3 is too soft and difficult to handle, so that the construction is difficult. On the other hand, when the hardness is too large (for example, when the hardness is 80 or more), it is difficult to compress the elastic member 3.
In this embodiment, since the durometer A hardness of the elastic member 3 is 60-70, workability can be improved.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and various modifications can be made as long as they are described in the claims.

  In the said embodiment, the elastic member 3 is arrange | positioned in the pipe line 1 in the state compressed in the circumferential direction by pulling the location away about 45 degrees from the slack in the circumferential direction, pushing the slack of the elastic member 3. However, the method of compressing the elastic member 3 in the circumferential direction may not be the method described above.

  In the above embodiment, the diameter of the main body 3a is constant, but it may not be constant. For example, the diameter of one half of the main body portion 3a in the axial direction (the portion disposed on the inner side of the end portion of the lining material 2) is approximately half of the other end side in the axial direction of the main body portion 3a (the outer side in the axial direction of the lining material 2). It may be smaller than the diameter of the portion).

  In the above embodiment, all the four rib portions 3b have the same shape, but may be different. For example, the protruding height of the two rib portions 3b provided in the axial range where the ring member 5 far from the tube end 1a among the elastic members 3 is disposed is closer to the ring member 5 closer to the tube end 1a. May be lower than the projecting height of the two rib portions 3b provided in the axial range in which is disposed.

  In the above-described embodiment, two rib portions 3b are provided in the axial range in which one ring member 5 is disposed, but the rib portions 3b are in an axial range in which one ring member 5 is disposed. Only one may be provided, or three or more may be provided.

  In the said embodiment, although the rib part 3b is each provided in the axial direction range where the two ring members 5 are arrange | positioned, the rib part 3b is only in the axial direction range where the one ring member 5 is arrange | positioned. It is not necessary to be provided in the axial range where the other ring member 5 is provided. Moreover, the elastic member 3 does not need to have the rib part 3b at all.

  In the above embodiment, the rib portion 3 b is provided on the outer peripheral surface of the elastic member 3, but the rib portion may be provided on the inner peripheral surface of the elastic member 3. In this case, the effect that the contact area between the elastic member 3 and the inner surface of the lining material 2 and the inner surface of the pipe line 1 is small cannot be obtained, but the effect that the elastic member 3 is easily compressed is the same as in the above embodiment. can get.

  In the above embodiment, the diameter of the ring member 5 is increased by using the diameter expansion device 10, but the diameter expansion means of the ring member 5 is not limited to this.

  In the above embodiment, the ring member 5 corresponds to the pressing member of the present invention. However, the pressing member of the present invention is not limited to the ring member 5 and contacts the inner circumferential surface of the elastic member 3 over one round. Then, any configuration that presses the elastic member 3 may be used.

In the above embodiment, the elastic member 3 is disposed so as to contact the inner surface of the end portion of the lining material 2 and the inner surface of the pipe line 1, but is disposed so as to contact only the inner surface of the end portion of the lining material 2. May be. In this case, water or the like cannot be prevented from entering from the end surface of the lining material 2, but the end portion of the lining material 2 is arranged in the circumferential direction as compared with the case where the ring member is disposed directly on the inner surface of the lining material 2. It can hold down equally and can prevent that water etc. penetrate | invade between the lining material 2 and the pipe line 1. FIG.
In this modification, the number of ring members arranged inside the elastic member 3 may be one. Moreover, the rib part 3b should just be provided in the axial direction range by which a ring member is arrange | positioned among the elastic members 3. FIG. Two or more rib portions 3b are preferably provided in the axial range.

  Although the said embodiment is an example which applied the edge part processing method of the lining material of this invention to the process of the edge part of the lining material 2 lining the gas conduit, the pipe line to which this invention is applied is gas It is not limited to a conduit, and may be a water supply pipe or a sewer pipe. Further, the inner diameter of the pipe line is not limited to the diameter described in the above embodiment.

DESCRIPTION OF SYMBOLS 1 Pipe line 2 Lining material 3 Elastic member 3a Main body part 3b Rib part 4 Base plate 5 Ring member (pressing member)
5a Tapered edge 6 Wedge shaped piece 7 Connecting plate

Claims (7)

An end treatment method for sealing an end of a lining material lined in a pipeline,
A first step of disposing a cylindrical elastic member at an end of the lining material;
A second step of arranging a pressing member for pressing the elastic member from the inside,
The elastic member has an outer diameter in a state where no external force is applied and is larger than an inner diameter of the pipeline, and is arranged in the pipeline in a compressed state in the circumferential direction. Edge processing method. In the first step,
The elastic member is arranged inside the end portion of the lining material, and only one place of the elastic member is loosened, and then the slack is pushed from the inner peripheral side, and two places separated from the slack in the circumferential direction. The edge processing method of the lining material according to claim 1, wherein the elastic member is compressed in the circumferential direction by pulling in a circumferential direction. An annular rib portion protruding outward is formed on the outer peripheral surface of the elastic member,
The edge processing method of the lining material according to claim 1 or 2, wherein, in the second step, the pressing member is pressed against an inner peripheral surface of a portion where the rib portion of the elastic member is formed.   The edge processing method of the lining material according to claim 3, wherein two or more of the rib portions are formed side by side in the axial direction.   In the first step, one of the plurality of rib portions is in contact with an inner surface of an end portion of the lining material, and the other rib portion is in contact with an inner surface of the pipe line. 5. The method for treating an end portion of a lining material according to claim 4, wherein an elastic member is disposed.   In the said 2nd process, the said edge part processing method of the lining material in any one of Claims 1-5 which compresses the said elastic member by the compression rate 10-20% by the said pressing member. .   The end treatment of the lining material according to any one of claims 1 to 6, wherein the elastic member has nitrile rubber (NBR) as a main component and has a durometer A hardness of 60 to 70 in accordance with JIS6253. Method.

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