JP5872793B2 - A method of installing new pipes in existing pipes using pipe pulling jigs - Google Patents

Description

  The present invention relates to a pipe pulling jig that is attached to one end of a new pipe to be installed and used to arrange the new pipe in an existing pipe, and a new pipe using the pipe pulling jig. The present invention relates to a method of disposing in existing piping.

  For example, as a piping facility for supplying hot water to a bathtub or the like, there is known a configuration in which a hot water supply pipe is inserted and disposed in a protective pipe called a Saya pipe. When the piping deteriorates due to aging, the aged piping in the protective tube is replaced with a new piping (after the aged piping is pulled out from the protective tube, the new piping is inserted and arranged in the protective tube).

  As a method for inserting and arranging a new pipe in the existing protective pipe, a hot water supply pipe is externally fitted to the inner core portion (screw screw is engraved on the outer peripheral surface) on one side of the connector and the other side of the connector. Attach one end of the guide pipe (the guide pipe inserted into the existing protective pipe) to the convex part on the side, from the tip of the inner core part of the connector to the tip of the guide pipe (the other end) Connect the guide pipe to the hot water supply pipe by connecting the connector and the guide pipe with the core wire penetrated, and then pull the other end of the guide pipe to protect the new hot water supply pipe A method is known in which it is drawn into the tube and inserted and disposed (see Patent Document 1).

Japanese Patent No. 3424051

  By the way, as piping equipment for supplying hot water to a bathtub or the like, there is a case in which a supply pipe is arranged as it is below the ground or under the floor without using a protective pipe (that is, for supply in the protective pipe). (There is a case where a double pipe structure in which piping is inserted and arranged is not adopted). Even when the double pipe structure is adopted, when replacing the supply pipe over time, the pipe may not be pulled out (taken out) from the protection pipe due to hardening or expansion deformation of the pipe. .

  Conventionally, in any of the above cases, in order to install a new pipe, a new pipe can be installed by digging up the ground and removing the aged pipe to install a new pipe, or by stripping the floor and removing the aged pipe under the floor. There is a problem that a very large-scale construction is required, the construction period is long, and the cost is high.

  Therefore, the present inventor has conceived a method of inserting and arranging a new pipe inside an aged pipe, instead of digging under the ground or under the floor and newly reconstructing it. In this way, when a new pipe is inserted and disposed in an aged pipe, it is important to use a new pipe having a larger inner diameter as much as possible because the flow rate decreases due to pressure loss when the inner diameter of the new pipe decreases. Therefore, it is required that the outer diameter of the new pipe is set to a size as close as possible to the inner diameter of the existing pipe.

  However, when the above conventional method is used to insert a new pipe (a new pipe whose outer diameter is smaller than the inner diameter of an aged existing pipe but with a size as close as possible) inside the existing aged pipe, The connector and the new pipe are connected by screwing the screw screw on the outer peripheral surface of the inner core part of the connector into one end of the new pipe. In order to firmly connect the new pipe so as not to be detached, the inner core must be designed to have a large outer diameter, and one end of the new pipe will be deformed and expanded to a large diameter during the screw connection. For this reason, there is a problem that it becomes difficult to insert the new pipe into the existing pipe over time.

  The present invention has been made in view of such technical background, and can prevent the new pipe from being deformed and expanded to a large diameter when connected to the new pipe to be installed, and can firmly connect the new pipe and the connecting means. It is possible to provide a pipe pulling jig that can be connected to the existing pipe and smoothly draw the new pipe into the existing pipe, and a method for arranging the new pipe in the existing pipe using the pipe pulling jig. And

  In order to achieve the above object, the present invention provides the following means.

[1] a long traction guide means;
A cylindrical sleeve fitted around the end of the pipe to be installed;
A connecting means having an insertion part inserted into and fitted into the internal space of the end of the pipe on one end side and a connecting part for connecting to the traction guide means on the other end side;
An outer diameter of the sleeve is the same as the outer diameter of the pipe or smaller than the outer diameter of the pipe.

[2] The connecting means has the insertion portion protruding from one surface of the substantially disk-shaped plate portion, and the connection portion protruding from the other surface of the approximately disk-shaped plate portion,
2. The piping pulling jig according to claim 1, wherein an outer diameter of the substantially disk-shaped plate portion is the same as an outer diameter of the sleeve.

  [3] The pipe pulling jig according to item 1 or 2, wherein the insertion portion is formed with a thread on the outer peripheral surface of the shaft body.

  [4] The pipe pulling jig according to any one of items 1 to 3, wherein the pulling guide means is a wire.

[5] A long traction guide means, a cylindrical sleeve having an outer diameter equal to or smaller than the outer diameter of the new pipe to be installed, and an end of the new pipe on one end side A pipe pulling jig comprising: a fitting means having an insertion fitting part inserted into and fitted into the internal space of the part and a connecting part for connecting to the pulling guide means on the other end side; , A method of arranging the new pipe in an existing pipe,
After forming a cut along the substantially axial direction of the new pipe at one end of the new pipe, the outer diameter of the one end of the new pipe is reduced, and the outer peripheral surface of the one end in the reduced diameter state, A step of externally fitting the sleeve (sleeve externally fitting step);
A step (insertion fitting step) of inserting and fitting the insertion portion of the connecting means into the internal space of the one end portion where the sleeve in the new pipe is fitted;
A step of inserting and arranging the traction guide means from one end side to the other end side of the existing pipe in the internal space of the existing pipe (traction guide means insertion step);
Connecting one end of the traction guide means to the connecting portion of the connecting means (connecting process);
A step of inserting and arranging the new pipe in the internal space of the existing pipe by pulling the other end portion of the traction guide means (new pipe insertion process). Method to arrange in.

[6] A long traction guide means, a cylindrical sleeve having an outer diameter equal to or smaller than the outer diameter of the new pipe to be installed, and the inside of the end of the new pipe An insertion portion to be inserted and fitted into the space protrudes from one surface of the substantially disk-shaped plate portion, and a connecting portion for connecting to the traction guide means protrudes from the other surface of the substantially disk-shaped plate portion. The new pipe is disposed in the existing pipe using a pipe pulling jig in which the outer diameter of the substantially disk-shaped plate portion is the same as the outer diameter of the sleeve. A way to
After forming a cut along the substantially axial direction of the new pipe at one end of the new pipe, the outer diameter of the one end of the new pipe is reduced, and the outer peripheral surface of the one end in the reduced diameter state, A step of externally fitting the sleeve (sleeve externally fitting step);
A step of inserting and fitting the insertion portion of the connection means into an internal space of one end portion of the new pipe to which the sleeve is externally fitted, and covering the entire tip end surface of the sleeve with the substantially disk-shaped plate portion of the connection means ( Insertion fitting process),
A step of inserting and arranging the traction guide means from one end side to the other end side of the existing pipe in the internal space of the existing pipe (traction guide means insertion step);
Connecting one end of the traction guide means to the connecting portion of the connecting means (connecting process);
A step of inserting and arranging the new pipe in the internal space of the existing pipe by pulling the other end portion of the traction guide means (new pipe insertion process). Method to arrange in.

  In the inventions of [5] and [6], the sleeve external fitting process needs to be performed before the insertion fitting process, and the new pipe insertion process needs to be performed after the insertion fitting process. The traction guide means insertion step and the connection step may be performed in any order as long as they are performed before the new pipe insertion step. The context of implementation is not particularly limited. For example, the connecting step, the traction guide means insertion step, the sleeve external fitting step, the insertion fitting step, and the new pipe insertion step may be performed in this order, or the traction guide means insertion step, the sleeve external fitting step, the insertion fitting step, You may implement in order of a connection process and a new piping insertion process.

  In the pipe pulling jig according to the invention of [1], the outer diameter of the cylindrical sleeve fitted to the end of the pipe to be installed (new pipe) is the same as the outer diameter of the new pipe or the new pipe. Since it is smaller than the outer diameter, the end of the new pipe is prevented from deforming and expanding to a larger diameter by inserting and connecting the insertion section of the connecting means to the end of the pipe where the sleeve is fitted. In addition, the new pipe and the connecting means can be firmly connected (the connecting means is not detached from the new pipe during pipe pulling). Accordingly, by pulling the other end portion of the traction guide means while the one end portion of the traction guide means inserted and arranged in the existing pipe is connected to the connection portion of the connection means, the new pipe is smoothly drawn into the existing pipe. be able to. In addition, since the new pipe and the connecting means can be firmly connected by using the sleeve, the length of the inserting portion of the connecting means can be set shorter, and thus the length of the inserting portion can be set shorter. In this case, the resistance due to the connecting means (insertion portion) when the new pipe passes through the bent portion of the existing pipe can be further reduced.

  In the invention of [2], the connecting means has an insertion portion protruding from one surface of the substantially disk-shaped plate portion, and a connecting portion protruding from the other surface of the substantially disk-shaped plate portion. Since the outer diameter of the disc-shaped plate portion is the same as the outer diameter of the sleeve, the insertion portion of the connecting means is inserted and connected to the end portion where the sleeve in the new pipe is fitted. In this case, the entire front end surface of the sleeve is covered with the substantially disk-shaped plate portion of the connecting means so that the new pipe is drawn into the existing pipe and the new pipe passes through the bent portion of the existing pipe. It is possible to sufficiently prevent the peripheral edge of the sleeve from being caught on the inner peripheral surface of the bent portion, and the new pipe can be more smoothly inserted into the existing pipe. In addition, when the connecting means is connected to the new pipe, the entire tip end surface of the sleeve is covered with the substantially disk-shaped plate portion of the connecting means in a conforming state, so that the inside of the new pipe can be used during the operation of drawing the new pipe into the existing pipe. It is possible to sufficiently prevent foreign matter and the like from entering.

  In the invention of [3], since the insertion portion of the connecting means is formed by forming a screw thread on the outer peripheral surface of the shaft body, the insertion portion of the connecting means is attached to the end portion of the pipe in which the sleeve is externally fitted. Can be fitted by screwing the insertion part into the inner peripheral surface of the end part of the new pipe, so that the new pipe and the connecting means can be connected more firmly.

  In the invention of [4], since the wire is used as the traction guide means, the new pipe can be drawn more smoothly into the existing pipe even if the existing pipe has a bent part or a narrow part. .

  According to the method of disposing the new pipe in the existing pipe according to the inventions of [5] and [6], after forming a cut along the substantially axial direction of the new pipe at one end of the new pipe, The outer diameter of one end of the new pipe is reduced, and the outer peripheral surface of the one end in the reduced diameter state has a cylindrical shape having an outer diameter that is the same as or smaller than the outer diameter of the new pipe. The outer pipe is then fitted, and then the insertion section of the connecting means is inserted into the inner space of one end where the sleeve in the new pipe is fitted, and the new pipe is deformed and expanded to a large diameter. In addition to preventing this, it is possible to firmly connect the new pipe and the connecting means (the connecting means is not detached from the new pipe during the pipe pulling). Therefore, by pulling the other end portion of the traction guide means while one end portion of the traction guide means inserted and arranged in the existing pipe is connected to the connection portion of the connection means, the new pipe is smoothly inserted into the existing pipe. Can be arranged.

  In the invention of [6], since the outer diameter of the substantially disk-shaped plate portion of the connection means is the same as the outer diameter of the sleeve, the insertion portion of the connection means is inserted into the internal space of one end portion where the sleeve in the new pipe is externally fitted. When the sleeve is inserted and fitted, the entire tip end surface of the sleeve can be covered with the substantially disk-shaped plate portion of the connecting means so that the new pipe is drawn into the existing pipe, and the new pipe is bent to the existing pipe. It is possible to sufficiently prevent the peripheral edge of the sleeve from being caught on the inner peripheral surface of the bent portion when passing through the pipe, and the new pipe can be more smoothly inserted into the existing pipe. In addition, when the connecting means is connected to the new pipe, the entire tip end surface of the sleeve can be covered with the substantially disk-shaped plate portion of the connecting means in a conforming state, so the new pipe can be used when the new pipe is drawn into the existing pipe. It is possible to sufficiently prevent foreign matter and the like from entering the interior of the housing.

(A) is a perspective view which shows one Embodiment of a connection means, (b) is a perspective view which shows one Embodiment of a sleeve. It is a perspective view which shows one Embodiment of a traction guide means. (A) is a side view showing a state in which a cut is formed in one end of a new pipe, (b) is a side view showing a state in which one end of the new pipe is reduced in diameter, and (c) a reduced diameter state in the new pipe. The side view which shows the state which fitted the sleeve to the edge part of this, (d) is sectional drawing which expands and shows the cross section of the XX line in (c). (A) is a side view showing a halfway state in which the insertion portion of the connecting means is inserted and fitted into one end portion of the new pipe in which the sleeve is externally fitted, and (b) is a means for connecting to the new pipe after being inserted and fitted. FIG. 5C is a side view showing a state in which one end portion of the traction guide means is connected to a connecting portion of the connecting means connected to the new pipe. (A) is a side view showing another embodiment of the connecting means, (b) is a side view showing a state in which the insertion portion of the connecting means is inserted and fitted into one end portion of the new pipe to which the sleeve is fitted. It is. It is a side view which shows other embodiment of a connection means.

  A pipe pulling jig 1 according to the present invention includes a connecting means 4, a cylindrical sleeve 3, and a long pulling guide means 2. An embodiment of the connecting means 4 is shown in FIG. 1 (a), an embodiment of the sleeve 3 is shown in FIG. 1 (b), and an embodiment of the traction guide means 2 is shown in FIG.

  The sleeve 3 is used by being fitted around the end of a new pipe 90 to be installed. Examples of the material of the sleeve 3 include a hard material such as metal.

  The outer diameter of the sleeve 3 is set to be the same as the outer diameter of the new pipe 90 to be installed. The outer diameter of the sleeve 3 may be smaller than the outer diameter of the new pipe 90 to be installed. In this case, it is preferable that the outer diameter of the sleeve 3 is set to be 80% or more and less than 100% of the outer diameter of the new pipe 90 to be installed.

  The connecting means 4 is used to connect the end of the new pipe 90 and the end of the traction guide means 2. Examples of the material of the connecting means 4 include hard materials such as metals. The connecting means 4 is provided with an insertion fitting portion 12 inserted and fitted into the inner space of the end portion of the new pipe 90 on one end side, and a connecting portion 13 for connecting to the traction guide means 2 on the other end side. Prepare.

  In the present embodiment, the connecting means 4 includes a substantially disk-shaped plate portion 11 in addition to the insertion portion 12 and the connecting portion 13. That is, in this embodiment, as shown in FIG. 1A, the connecting means 4 has the insertion portion 12 protruding from one surface of the substantially disk-shaped plate portion 11, and the substantially disk-shaped plate portion. The connecting portion 13 protrudes from the other surface of 11.

  The insertion portion 12 has a thread 16 formed on the outer peripheral surface of the shaft body 15. A connecting hole is provided in the connecting portion 13. The insertion part 12 and the connection part 13 are both smaller than the outer diameter of the new pipe 90 to be installed. Moreover, it is preferable that both the insertion part 12 and the connection part 13 are smaller than the outer diameter of the sleeve 3.

  A peripheral side surface of the substantially disk-shaped plate portion 11 is formed as an inclined surface inclined inward from the side where the insertion portion 12 is provided toward the side where the connecting portion 13 is provided. The inclined surface is formed as a curved surface that bulges outward. The outer diameter of the substantially disk-shaped plate portion 11 is the same as the outer diameter of the sleeve 3. That is, the outer diameter of one surface of the substantially disk-shaped plate portion 11 where the insertion portion 12 is provided is the same as the outer diameter of the sleeve 3. The insertion part 12 and the connection part 13 are smaller than the outer diameter of the substantially disk-shaped plate part 11.

  The traction guide means 2 is not particularly limited as long as it is a flexible thin wire that can be easily inserted into existing piping, and examples thereof include a wire such as a metal wire. In the present embodiment, a metal wire is used as the traction guide means 2 (see FIG. 2). The metal wire may be coated with a resin coating material or may be configured not to be coated with a coating material.

  A connecting portion 50 having a connecting hole is formed at one end of the traction guide means 2. The connecting portion 50 is used for connecting to the connecting means 4.

  Next, an example of a method for arranging a new pipe (installed pipe) 90 in an existing pipe (an aged existing pipe already installed under the ground, under the floor, etc.) using the pipe pulling jig 1. Will be described.

  The new pipe 90 to be installed is used as, for example, a hot water supply pipe (pipe for supplying hot water to a bathtub, etc.), and is inserted into the existing pipe and used. For example, this arrangement method can be applied when the existing piping has deteriorated over time.

  The outer diameter of the new pipe 90 is usually smaller than the inner diameter of the existing pipe, but is set to a size approximate to the inner diameter. In particular, the outer diameter of the new pipe 90 is preferably set to a size that is 1 mm to 2 mm smaller than the inner diameter of the existing pipe. In this case, a larger flow rate can be secured.

  As shown in FIG. 3A, a cut 31 is formed at one end of the new pipe 90 along the substantially axial direction of the new pipe 90. The length of the notch 31 is larger than the length of the sleeve 3 (length in the axial direction). In particular, the length of the cut 31 is preferably 1 to 20 mm longer than the length of the sleeve 3 (length in the axial direction). As the new pipe 90, a flexible pipe is usually used. Although it does not specifically limit as said flexible piping, For example, a fluorine resin piping etc. can be illustrated.

  Thereafter, as shown in FIG. 3B, the outer diameter of one end portion of the new pipe 90 is reduced by forming an overlapping portion 32 on the pipe wall at one end portion of the new pipe 90 using the notch 31. (The outer diameter of one end of the new pipe 90 is made smaller than the outer diameter of the other end of the new pipe 90). The overlapping portion 32 can be formed, for example, by strongly sandwiching one end portion (the end portion where the cut 31 is formed) of the new pipe 90 with fingers of a human hand.

  Next, as shown in FIGS. 3 (c) and 3 (d), the sleeve 3 is externally fitted on the outer peripheral surface of one end portion of the new pipe 90 in a reduced diameter state. At this time, it is preferable to make the front end surface of the new pipe 90 substantially coincide with the front end surface of the sleeve 3.

  Next, as shown in FIG. 4A, the insertion portion 12 of the connecting means 4 is inserted and screwed into one end portion of the new pipe 90 where the sleeve 3 is externally fitted.

  By further advancing the insertion screwing of the insertion portion 12, as shown in FIG. 4B, the insertion portion 12 of the connecting means 4 is inserted into one end of the new pipe 90 where the sleeve 3 is externally fitted. The whole end face of the sleeve 3 is covered with the substantially disk-shaped plate portion 11 of the connecting means 4 by being inserted and fitted. At this time, it is preferable to insert and fit the peripheral portion of the substantially disk-shaped plate portion 11 of the connecting means 4 so as to be in contact with the tip of the sleeve 3 (see FIG. 4B) or close thereto.

  In this way, the connecting means 4 is inserted into one end of the new pipe 90 where the sleeve (sleeve having the same outer diameter as the new pipe or smaller than the outer diameter) 3 is fitted. Since the portion 12 is inserted and fitted, the new pipe 90 can be prevented from deforming and expanding to a large diameter, and the new pipe 90 and the connecting means 4 can be firmly connected.

  Next, the traction guide means 2 is inserted and arranged in the internal space of the existing pipe from one end side to the other end side of the existing pipe. Next, as shown in FIG. 4C, the connecting portion 50 at one end of the traction guide means 2 (the traction guide means 2 in a state of being inserted and arranged inside the existing pipe) is connected to the connection portion 13 of the connection means 4. . That is, one end of the wire 40 is inserted through the connecting hole of the connecting portion 13 of the connecting means 4 and folded back, and the other end of the wire 40 is inserted through the connecting hole of the connecting portion 50 of the traction guide means 2 and folded back. Thus, the connecting means 4 and the traction guide means 2 are connected.

  Thereafter, the new pipe 90 is smoothly drawn into the existing pipe by pulling the other end 51 of the traction guide means 2 protruding from the other end opening of the existing pipe in a direction away from the existing pipe. The new pipe 90 can be inserted and arranged inside.

  In the above embodiment, since the entire distal end surface of the sleeve 3 is covered with the substantially disk-shaped plate portion 11 of the connecting means 4 in a conforming state, the new pipe 90 is drawn into the existing pipe and the new pipe 90 is While it is possible to sufficiently prevent the peripheral edge of the sleeve 3 from being caught on the inner peripheral surface of the bent portion when passing through the bent portion of the existing pipe, the new pipe 90 can be more smoothly inserted into the existing pipe. It is possible to sufficiently prevent foreign matter and the like from entering the inside of the new pipe 90 when the new pipe 90 is drawn into and inserted into the existing pipe.

  In the said embodiment, although the connection means 4 is employ | adopted as the structure provided with the insertion part 12, the connection part 13, and the substantially disc shaped board part 11, it is not limited to such a structure in particular, For example, A configuration as shown in FIG. 5A can also be adopted.

  The connection means 4 shown in FIG. 5A has a configuration including an insertion part 22 and a connection part 23. That is, the connecting means 4 includes an insertion part 22 in which a thread 26 is formed on the outer peripheral surface of the shaft body 25, and a connection part 23 connected to the base end of the insertion part 22. A connecting hole is provided in the connecting portion 23. FIG. 5B shows a state in which the insertion portion 22 of the connecting means 4 is inserted and fitted into one end portion of the new pipe 90 where the sleeve 3 is externally fitted.

  Moreover, in the said embodiment, although the screw threads 16 and 26 formed in the insertion part 12 of the connection means 4 are comprised by single (1 item | strip) (FIG. 1 (a), FIG. 5 (a)). For example, the structure may be double (two).

  Moreover, in the said embodiment, although the insertion part 12 in the connection means 4 is a structure by which the screw thread 16 is formed in the outer peripheral surface of the shaft body 15, the said insertion part is especially such screwing. It is not limited to a possible configuration. For example, as shown in FIG. 6, a configuration in which one or a plurality of protrusions 36 are provided on the outer peripheral surface of the shaft body 35 may be employed as the insertion portion 34 of the connecting means 4. In this case, if the protrusion 36 of the insertion portion 34 of the connecting means 4 is inserted and fitted into the internal space of one end portion of the new pipe 90 where the sleeve 3 is externally fitted by using a hammer or the like. Good. In addition, in FIG. 6, 33 is a connection part (connection part for connecting with the traction guide means 2).

  In addition, the said arrangement | positioning method is only what demonstrated the example, and the arrangement | positioning method of this invention is not specifically limited to the said method.

  The pipe pulling jig according to the present invention is attached to one end of a new pipe to be installed, and is used to insert and arrange the new pipe into the existing pipe.

DESCRIPTION OF SYMBOLS 1 ... Pipe pulling jig | tool 2 ... Pulling guide means 3 ... Sleeve 4 ... Connection means 11 ... Substantially disk-shaped board part 12, 22, 34 ... Insertion part 13, 23, 33 ... Connection part 15, 25 ... Shaft body 16 26 ... Thread 31 ... Cut 90 ... New piping

Claims (3)

A long traction guide means, a cylindrical sleeve having an outer diameter equal to or smaller than the outer diameter of the new pipe to be installed, and the inside of the end of the new pipe on one end side A pipe pulling jig comprising a connecting means having an insertion fitting part inserted into the space and a connecting part for connecting to the pulling guide means on the other end side. A method of arranging piping in existing piping,
After forming a cut along the substantially axial direction of the new pipe at one end of the new pipe, the outer diameter of the one end of the new pipe is reduced, and the outer peripheral surface of the one end in the reduced diameter state, Externally fitting the sleeve;
Inserting and fitting the insertion portion of the connecting means into the internal space of the one end portion where the sleeve in the new pipe is externally fitted; and
A step of inserting and arranging the traction guide means from one end side to the other end side of the existing pipe in the internal space of the existing pipe;
Connecting one end of the traction guide means to the connecting portion of the connecting means;
And a step of inserting and arranging the new pipe in the internal space of the existing pipe by pulling the other end of the towing guide means. Inserted into the internal space at the end of the new pipe, a long traction guide means, a cylindrical sleeve having an outer diameter equal to or smaller than the outer diameter of the new pipe to be installed The fitting portion to be fitted is projected on one surface of the substantially disk-shaped plate portion, and the connecting portion for coupling to the traction guide means is projected on the other surface of the substantially disk-shaped plate portion. A connection means, and a method of arranging the new pipe in an existing pipe using a pipe pulling jig in which the outer diameter of the substantially disk-shaped plate portion is the same as the outer diameter of the sleeve. There,
After forming a cut along the substantially axial direction of the new pipe at one end of the new pipe, the outer diameter of the one end of the new pipe is reduced, and the outer peripheral surface of the one end in the reduced diameter state, Externally fitting the sleeve;
Inserting and fitting the insertion portion of the connecting means into the internal space of one end portion of the new pipe to which the sleeve is externally fitted, and covering the entire distal end surface of the sleeve with the substantially disk-shaped plate portion of the connecting means; ,
A step of inserting and arranging the traction guide means from one end side to the other end side of the existing pipe in the internal space of the existing pipe;
Connecting one end of the traction guide means to the connecting portion of the connecting means;
And a step of inserting and arranging the new pipe in the internal space of the existing pipe by pulling the other end of the towing guide means. After forming the incision, by allowed to form an overlap portion in the tube wall at one end of the new pipe by utilizing the cut, to claim 1 or 2 reduced in diameter the outer diameter of one end of the new pipe A method of arranging the new pipe described in the existing pipe.

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