JPH03211037A - Method for pulling lining material into pipe line - Google Patents

Abstract

PURPOSE:To constitute the title method so that friction is not generated between a lining material and a pipe line, by a method wherein the lining material is pulled into the pipe line under a state where the lining material is put on an upper beltlike matter and a load to be required for that pulling-in is born wholly by the beltlike matter. CONSTITUTION:A lining material 9 is constituted so that the tip part of the same is put on an upper beltlike matter 4a, a rear part of the same comes out of a manhole 2 and is veered out of a veering machine. A lower beltlike matter 4b is fixed by suspending rotation of a wind-up machine 7 under this state, the upper beltlike matter 4a is made veerable by making a wind-up machine 6 turnable and a rotary roller 5 is pulled leftward with a traction rope 8 under this state. With this construction, a beltlike matter 4 is pulled into a pipe line 1 while the upper beltlike matter 4a is being veered from the wind-up machine 6 while inverting the beltlike matter 4 by turning the rotary roller 5 so that the upper side becomes the lower side. The upper beltlike matter 4a is moved leftward in an illustration at a speed of two times as fast as advancing speed of the rotary roller 5. The lining material 9 supported above the upper beltlike matter is pulled into the pipe line 1 and the tip of the lining material 9 is caused to arrive at the left side of the pipe line 1 at almost the same time as the rotary roller 5.

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention provides a method for lining the inner surface of a pipe with a lining material that is drawn into the pipe without applying an excessive load to the inner surface of the pipe. It concerns a method for.

BACKGROUND ART Conventionally, as a general method for lining a pipe, the end of a cylindrical lining material is fixed in an annular shape at one end of the pipe, fluid pressure is applied to the rear part of the fixed tubular part, and the fluid pressure is The so-called inverted lining method is known, in which the lining material is pushed into the pipeline while being inverted so that the inside is facing outward, and at the same time, the lining material is crimped to the inner surface of the pipeline using fluid pressure and lined. .

This method is extremely excellent as a method for lining long pipes, and has attracted particular attention in recent years. However, this method is not necessarily suitable when the lining material is extremely thick or when the lining material itself does not have sufficient strength.

In particular, in recent years, it has been considered to use sheet molding compound (hereinafter abbreviated as SMC) as a lining material for sewer pipes and the like. This SMC is made by blending reinforcing materials such as glass fiber with other compounding agents into unsaturated polyester, and forming it into a sheet by covering both sides with a film.
This is a sheet-shaped molding material that is heated under predetermined conditions to thicken it and make it non-adhesive.

Since this SMC is in the form of a sheet, it cannot be applied to the above-mentioned inversion lining method, and even if it is forced into a cylindrical shape, uncured SMC has low strength and cannot withstand the fluid pressure of inversion. Therefore, it is not suitable for the inverted lining method.

As a method of lining using this SMC, there is a method disclosed in Japanese Patent Application No. 1-204355 previously filed by the applicant. This method involves rolling a sheet of SMC so that its diameter is smaller than the inner diameter of the pipe, pulling it into the pipe and inserting it, and expanding the SMC so that it comes into pressure contact with the inner surface of the pipe and overlaps both side edges. , which is heated and hardened.

However, in this method, since the strength of the SMC is low, when tension is applied to draw the SMC into the pipe, there is a risk that the SMC may be torn apart.

Various methods are known for drawing such a lining material into a pipe.

JP-A No. 62-132630 discloses a method in which a lining material is held on a belt, the belt is inserted into the duct while sliding against the inner surface of the duct, and an air layer is formed between the belt and the lining material. A method is described in which the belt is pulled out of the conduit while the lining material remains in the conduit.

Furthermore, Japanese Patent Application Laid-open No. 152727/1983 discloses that a lining material is wound around a tensioning mechanism disposed inside a pipe, and with one end of the lining material fixed, the tensioning mechanism is advanced to pull the lining material into the pipe. The method is described.

Furthermore, Japanese Patent Application Laid-Open No. 62-152726 discloses a method in which a lining material is floated on water in a pipe and then drawn into the pipe.
Further, Japanese Patent Application Laid-Open No. 64-64827 describes a method of drawing a lining material into a pipe while being held by a long holding member.

Furthermore, Japanese Patent Application Laid-Open No. 55-31473 discloses that a lining material is supported by a cover material on a double upper and lower sheet, and the lining material and the cover material are drawn into a pipe together, and the cover material is A method is described in which the tip is folded back so that it is between the upper layer and the lower layer, and then pulled out backwards.

Problems to be Solved by the Invention However, in the invention disclosed in JP-A-62-132630, when the belt is pulled out from inside the pipe, an air layer is formed between the lining material and the belt. , the frictional resistance between the two is greatly reduced, but it is difficult to form a complete air layer between the flexible lining material and the belt to completely lift the lining material from the belt. Contact cannot be completely eliminated. Therefore, when the belt is pulled out, the belt and the lining material come into partial contact, and it is inevitable that the pulling force will also act on the lining material, causing tension to be applied locally.

In particular, when inserting a long lining material into a long pipe, even if the tension acting on the lining material is small partially, a large tension will act on the lining material as a whole.
This may result in excessive deformation.

Furthermore, in the invention of JP-A-62-152727, a tension force is applied to the lining material portion extending rearward from the tension ajf II 4 to pull the lining material, and particularly when applied to a long pipe, It is not possible to draw the lining material into the conduit without applying tension. Furthermore, when the lining material hangs down behind the tension mechanism, friction occurs with the lining material laid below and the inner surface of the pipe.

Furthermore, in the method described in JP-A-62-152726, the lining material is inserted into the pipe while floating on water, but this is not preferable because the lining material gets wet with water. In particular, depending on the type of curable resin impregnated into the lining material, moisture may have an adverse effect on the curability, so it is not preferable to soak the lining material in water.

Further, in the method described in Japanese Patent Application Laid-Open No. 64-64827, when the holding member is pulled out from the pipe, a large frictional resistance acts between the lining material and the holding member, and tension is applied to the lining material.

Furthermore, in the method described in JP-A-55-31473, unlike the previous four known techniques, the application of tension to the lining material is avoided as much as possible, and as long as the process proceeds smoothly, the lining material Problems such as excessive deformation of the material are less likely to occur.

However, in this method, when the belt supporting the lining material is drawn into the pipe, a large frictional resistance is generated between the belt and the inner surface of the pipe. The inner surface of the pipeline is often uneven due to rust or debris, and when a belt carrying heavy lining material is dragged through these areas, the belt is subjected to intense friction, causing it to get caught or damaged. There is fear;
Difficult to pull in smoothly.

When a lining material such as SMC, which does not have high strength, is drawn into a pipe, the lining material will not come into contact with the inner surface of the pipe and be damaged, and tension will not act due to frictional resistance.
It is also necessary to prevent excessive frictional resistance from occurring between the belt and the pipe that supports the lining material of the mana. Furthermore, even when the belt or the like is removed after the lining has been inserted, it is undesirable for frictional resistance to occur between the belt or the like and the lining.

The present invention has been made in view of the above circumstances, and it is possible to support the lining material with a strip and draw it into the pipe without applying tension to the lining material. The object of the present invention is to provide a method for removing only the strip-like material while leaving it in the roadway without causing friction with the lining material.

As a means for solving the problem, the first invention of the present application is to wrap a strip around a rotating roller at one end of the pipe, and to wrap the upper strip of the two strips extending rearward from the rotating roller. While supporting the tip of the lining material and moving the rotating roller from the one end of the pipe to the center, fixedly supporting the rear part of the upper strip and rotating the lower strip. The lower side of the two strips is pulled into the pipe while being reversed with the roller so that the lower side is the upper side, and then the lower of the two strips is moved while the rotating roller is advanced from the center of the pipe to the other end. Fixedly supporting the rear part of the strip,
While inverting the upper strip with the rotating roller so that it is on the upper side or the lower side, the lining material is supported on the upper strip and drawn into the pipe, and the tip of the lining material is rotated as described above. The roller 2 reaches the other end of the pipe at the same time, releases the support for the lining material from the strip, and then pulls the lower strip from one end of the pipe to the folded part. This method is characterized in that the strip is removed from the conduit while being inverted so that the upper side becomes the lower side.

The second invention also provides a method for wrapping a strip around a rotating roller at one end of the pipe, and fixedly supporting the lower of the two strips extending rearward from the rotating roller. While advancing the rotating roller from the one end to the other end of the conduit, drawing the upper strip into the conduit while inverting it from the upper side to the lower side on the rotating roller,
When the rotating roller reaches the center of the pipe, the tip of the lining material is supported by the upper strip at the one end of the pipe, and while advancing the rotating roller to the other end of the pipe, While inverting the upper strip from the upper side to the lower side using a rotating roller, the second strip and the lining material supported on the strip are drawn into the pipe, and the tip of the lining material is turned over from the front 3. The rotating rollers mentioned above simultaneously reach the other end of the pipe,
The support for the lining material is released from the strip, and then the lower strip is pulled from one end of the pipe, and the strip is removed from the pipe while being reversed so that the upper side becomes the lower side at the folded part. It is characterized by:

In addition, the third invention is to wrap a strip around a rotating roller at one end of the conduit, and fixedly support the lower strip of the two strips extending rearward from the rotating roller. The upper strip supports the tip of the lining material at a distance corresponding to the length of the pipe line from the position of the rotating roller, and the rotating roller extends from the one end of the pipe line to the other end. While advancing, the upper strip extending backward from the rotating roller is pulled into the pipeline while being reversed from the upper side to the lower side on the rotating roller, and the lining material supported on the upper strip is pulled into the pipeline. The tip of the lining material is made to reach the other end of the pipe line almost simultaneously with the rotating roller, and the support of the lining material is released from the strip. The method is characterized in that the strip-like material is pulled and removed from the conduit while being reversed at the folded portion so that the upper side becomes the lower side.

Furthermore, in these inventions, after the rotating roller is advanced to the other end of the pipe and the upper strip and the lining material supported on the strip are drawn into the pipe, the strip is removed from the pipe. To remove the lining, remove the support for the lining material from the strip, remove the rotating roller, and pull the folded portion of the strip from one end of the pipe to the other end, so that the upper and lower strips are separated between them. The strip can also be removed from the conduit while being inverted.

Example Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the state in which a lining material is inserted into a conduit by the method of the present invention. Reference numeral 1 denotes a conduit which is buried underground, and the conduit 1 opens into a manhole 2.3.

Reference numeral 4 denotes a belt-shaped material, which is hung around the rotating port 5 in the pipe 1, and extends rearward from the rotating roller 5 in a vertically double manner, with its upper and lower sides The ends of the strips 4a, 4b each extend above ground through the manhole 2 and are wound around a winder 6.7. Further, a tow rope 8 is connected to the rotating roller 5,
The towing cable 8 is pulled out from the manhole 3 to the ground and is towed by a traction means (not shown). It is preferable that the surfaces of the strip 4 whose top and bottom are opposite to each other be made of a material with a small coefficient of friction, or coated with a suitable lubricant.

9 is a lining material. The leading end of the lining material 9 is placed on the upper strip 4a, and the rear end thereof exits from the manhole 2 and is fed out from a feeding machine (not shown).

In the state shown in FIG. 1, the rotation of the winder 7 is stopped to fix the lower strip 4b, and the winder 6 is allowed to rotate so that the upper strip 4a can be fed out. Then, the rotating roller 5 is pulled to the left in the figure using the tow rope 8. As a result, the strip 4 is rotated by the rotating roller 5 and reversed so that the upper side becomes the lower side, while the upper strip 4a is drawn out from the winder 6 and drawn into the conduit 1. The upper strip 4a advances to the left in the figure at twice the traveling speed of the rotating roller 5, pulls the lining material 9 supported thereon into the pipe 1, and rotates the tip of the lining material 9. It is made to reach the left end of the conduit 1 almost at the same time as the roller 5. FIG. 6 is a cross-sectional view of the lining material 9 inserted into the pipe line l.

In this method, the lining material 9 advances at twice the traveling speed of the rotating roller 5, so the upper strip 4a
If the placement position of the lining material 9 is not appropriate, it will cause trouble. That is, when the lining material 9 is placed too far forward, the lining material 9 catches up with the rotating roller 5 before the rotating roller 5 reaches the end of the pipe line 1, and the lining material 9
There is a risk that the end of the belt-like material 4 may be turned over by the rotating roller 5. Moreover, if the position of the lining material 9 is too far backward, even if the rotating roller 5 reaches the end of the pipe line 1, the lining material 9 will not reach it yet, and only the upper strip 74a will be pulled by another means. The process becomes complicated.

Therefore, in the first invention, the arrival timing of the lining material 9 is adjusted by adjusting the feeding and stopping of the strip 4 in the winder 6 and the winder 7.

FIG. 2 shows an example thereof. (a) in FIG. 2 shows the initial state. The rotating roller 5 is located at one end of the conduit, where it rests the tip of the lining material 9 on the upper strip 4a. It is preferable that the tip of the lining material 9 be fixed to the upper surface of the upper strip 4a.

Here, the winder 6 is fixed so as not to rotate, and the winder 7 is allowed to rotate. The tow rope 8 is then pulled to move the rotating roller 5 to the left in the figure. The upper strip 4a is taken up 8
Since the belt 6 is fixed, it is not fed out, and only the lower strip 4b is fed out from the winder 7. Then, while the strip 4 is reversed on the rotating roller 5 so that the lower side becomes the upper side, the lower strip 4b is fed out from the winder 7 and the rotating roller 5 advances. This state is shown in Figure 2 (b
) is shown.

Then, as shown in FIG. 2(C), when the rotating roller 5 reaches the center of the length of the pipe line 1, -
The towing of the tow rope 8 is then stopped. The position of the rotary roller 5 can be determined from the take-up length of the tow rope 8 or the let-out length of the lower strip 4b.

Here, the winder 6 is unfixed so that it can rotate, and the winder 7 is fixed so that it cannot rotate.

Next, the rotating roller 5 is pulled again by the tow rope 8 to move the rotating roller 5 to the left. At this time, the lower strip 4b is fixed by the winder 7 and cannot advance, and the upper strip 4a advances while being fed out from the winder 6. Flip it so that it is on the side.

The lining material 9 supported by the upper strip 4a advances together with the strip 4a and is drawn into the pipe 1. This state is shown in FIG. 2(d).

9 Here, the rotating roller 5 advances from the center of the pipe 1 to the other end of the pipe, and the tip of the lining material 9 moves along the entire length of the pipe at twice the speed of the rotating roller 5. The rotating roller 5 and the tip of the lining material 9 simultaneously reach the other end of the pipe. This state is shown in FIG. 2(e).

In the second invention, when the rotary roller 5 is advanced to the center of the pipe 1, it is advanced while pulling out the upper strip 4a.

That is, in the state shown in FIG. 2(a), the winder 7 is fixed and the winder 6 is allowed to rotate. Note that the winder 7 may not be provided and the end of the lower strip 4b may be fixedly supported by an appropriate means. The lining material 9 is placed facing the end of the pipe, but is not fixed to the upper strip 4a.

In this state, the rotary roller 5 is pulled by the traction cable 8, and the state shown in FIG. 2(b) is brought to the state shown in FIG. 2(c).

At this time, the lower strip 4b is fixed, so it can move forward.The upper strip 4a is fed out from the winder 6, and is turned over by the rotating roller 5 so that the upper side becomes the lower side. The rotating roller 5 is drawn into the pipe 1 and reaches the center of the pipe 1.

When the rotating rollers 5 reach the center of the pipe line 1, pulling of the tow rope 8 is stopped, and the lining material 9 is supported on the upper surface of the upper strip 4a at the end of the pipe line 1. At this time, it is preferable that the lining material 9 be fixed to the strip-like material 4a.

Thereafter, the towing of the tow rope 8 is resumed, and as described in the first invention, the rotary roller 5 is moved through the state shown in FIG. 2(e) through the state shown in FIG. 2(d). 1 to the other end.

In the third invention, the lining material 9 is supported at a predetermined position on the strip 4, and only the upper strip 4a is advanced by the rotating roller 5, so that the lining material 9 is moved together with the upper strip H4a. It is drawn into the pipe line 1.

FIG. 3 shows an embodiment of the third invention. FIG. 3(a) shows the initial state 1, in which a rotating roller 5 is located at one end of the pipe 1, a strip 4 is wrapped around the rotating roller 5, and the lower side The end of the strip 4b is fixedly supported. Note that this lower strip 4b may be connected to the winder 7.

Then, on the upper strip 4a, there is a position at a distance corresponding to the length of the pipe line backward from the position of the rotating roller 5.
The end of the lining material 9 is supported, and the lining material 9 is placed on the upper strip 4a from there toward the rear. In the drawing, the upper strip 4a is placed on the rotating roller 5
Although it is described as extending rearward in a straight line from
It is sufficient that the positional relationship of the lining material 9 on the upper side a is appropriate, and the upper strip 4a does not necessarily need to extend linearly. It is also possible to wind the strip 4a and the lining material 9 around the winder 6 while the lining material 9 is supported on the upper strip 4a.

In this state, when the rotating roller 5 is pulled to the left in the figure by the tow rope 8, the strip 4 is reversed on the rotating roller 5 so that the upper side becomes the lower side, and the upper strip 4a is rolled up. It advances to the left while being fed out from the taker 6, and the lining material 9 supported thereon is advanced.

When the rotating roller 5 reaches the center of the conduit 1, the tip of the lining material 9 reaches the end of the conduit 1-, as shown in FIG. 3(b). When the rotating roller 5 is further pulled from there, the lining material 9 is drawn into the pipe line 1 as the upper strip 4a advances, and as shown in FIG. Almost at the same time, pipe 1
reach the other end.

The lining material 9 is attached to the conduit 1 using one of the methods described above.
When the tip of the lining material 9 reaches the other end of the conduit 1, traction by the tow rope 8 is stopped and the strip 4
The support for the lining material 9 is released from the folded portion of the lining material 9, and the strip material 4 is removed while leaving the lining material 9 in the pipe line 1.

FIG. 4 shows an example of the embodiment. First, the rotating roller 5 is removed from the folded part of the strip 4, the winding machine 6 is stopped, and the winding machine 7 is rotated and the lower The strip 4b is taken off. As a result, the strip 4 is turned over so that the upper side becomes the lower side at the folded part 10 from which the rotating roller 5 was removed, and the lower strip 4b is connected to the upper strip 4a and the inner surface of the conduit 1. It slides between the two, moves backward, and is wound up by the winding machine 7. When the folded part 10 of the strip 4 reaches the one end of the pipe 1, the removal of the strip 4 from the pipe 1 is completed, and the lining material 9 remains inserted into the pipe 1. .

The fourth invention is another method of removing the strip 4 from the conduit 1 according to the present invention, in which the upper strip 4a and the lower strip 4b are both pulled in between and removed. .

FIG. 5 shows an embodiment of the present invention, in which a string-like object 11 such as a string, belt, or tape is placed between an upper band-like object 4a and a lower band-like object 4b.

By attaching its tip to the rotating roller 5, the string-like material 11 can be arranged in accordance with the forward movement of the rotating roller 5.

After the rotating roller 5 is removed from the folded portion 10 of the strip 4, the string 11 is coupled to the folded portion 10 and pulled from the one end of the conduit 1. As a result, the folded portion 10 is drawn between the upper strip 4a and the lower strip 4b, and a new reversed portion 12 is formed. Then, at the inverted portion 12, the upper strip 4a
While inverting the strip so that the upper side becomes the lower side and the lower strip 4b so that the lower side becomes the upper side, the flipped strip 4C passes between the upper and lower strips 4a and 4b. and then pulled out backwards. When the reversible portion 12 reaches the one end of the conduit 1, the removal of the strip 4 is completed, and the lining material 9 remains inserted into the conduit 1.

Operation In the present invention, the lining material 9 is drawn into the conduit 1 while being placed on the upper strip 4a, and the strip 4 bears all the load required for its drawing. Therefore, the lining material 9
There is no tension acting on 5 at all.

Furthermore, when the lining material 9 enters the pipe 1, the lower strip 4b in contact with the inner surface of the pipe 1 is stopped, and the upper strip 4b on which the lining material 9 is placed is placed on top of it. 4a will slide and move.

Therefore, the strip 4 is not caught on the unevenness of the inner surface of the conduit 1 or damaged by friction, and can be moved smoothly.

In the first invention, the lower strip 4b advances while rubbing against the inner surface of the pipe line 1 until the rotating roller 5 is positioned at the center of the pipe line 1, but at this stage, the lining material 9 is located outside the conduit 1, so that the weight of the lining material 9 is not applied to the lower strip 4b. Therefore, the frictional resistance is small and it can be pulled in smoothly without getting caught or damaged.

Further, in the second and third inventions, when the lining material 9 is drawn in, the lower strip 4b is always stopped, and there is no fear of friction or catching with the inner surface of the pipe line 1.

6 Next, when the strip 4 is pulled out from the conduit 1, the upper strip 4a does not move with the lining material 9 placed thereon.
No tension is applied to the lining material 9 due to friction between the strip 4 and the lining material 9. and the folded part 1 of the strip 4
0 or while reversing at the reversing portion 12, the lower strip 4b
Alternatively, the inverted strip 4C moves backward, reaches one end of the conduit 1, and is removed.

Effects of the Invention According to the present invention, the lining material 9 is drawn into the pipe line 1 while being placed on the upper strip 4a, and does not come into direct contact with the inner surface of the pipe line 1, and the lining material 9 does not directly contact the inner surface of the pipe line 1. Since the lining material 9 and the belt-like material 4 do not rub against each other, the lining material 9 is not worn or damaged.

Furthermore, when the lining material 9 is pulled in, all the load required for pulling it is borne by the strip 4, so no tension is directly applied to the lining material 9, and the lining material 9, which has a low strength such as the above-mentioned SMC, Even if it is 9, there is no risk of it being stretched or deformed by tension.

Three methods are listed for placing the lining material 9 on the upper strip 4a and drawing it into the conduit 1, each of which has advantages and disadvantages.

That is, although the method of the first invention requires two take-up machines 6 and 7, the process can proceed only by operating the two take-up machines 6 and 7, and as shown in FIG. Since the tip of the lining material 9 can be supported and fixed on the upper strip 4a in advance, the operation is easy.

In the second invention, only one winding machine 6 is required and the equipment is simple, but on the other hand, the tip of the lining material 9 cannot be fixed to the upper strip 4a in advance. After the rotating roller 5 reaches the center of the pipe line 1, the lining material 9 must be supported on the strip 4a again, and the subsequent steps are complicated.

Further, even after the insertion of the lining material 9 is completed, the lower strip 4b must be reconnected to the winder in order to remove the strip 4.

8 Furthermore, in the third invention, the device is simple and the operation process is simple. The lining material 9 must be supported, and there is a possibility that the strip 4 will expand to some extent during the stage of drawing the front half of the upper strip 4a into the pipe 1.
There is a problem that the position of the lining material 9 is not necessarily accurate, and there is a high possibility that a deviation occurs in the arrival of the rotating roller 5 and the lining material 9 to the other end of the pipe line 1.

Next, in the process of inserting the lining material 9 into the pipe 1 and removing the strip 4 from the pipe 1, the upper strip 4a is fixedly supported, and the lower strip 4b or folded Since the strip material 4C is pulled backward and removed, there is no friction between the inner lining material 9 and the inner surface of the pipe 1 or the strip material 4 at this stage, and the inner lining material 9 is not damaged. There is no fear that the loop will bend due to tension.

Comparing the first to third inventions and the fourth invention, in the latter, compared to the former, the folded strip 4C that moves backward does not rub against the inner surface of the conduit 1, causing damage. Although this does not occur and the tensile load is small, there is a possibility that the lining material 9 will move unnecessarily due to the fact that the strip 4 becomes quadruple in some parts and becomes thicker, so that the lining material 9 passes through that part. In addition, the string-like object 11 can be inserted into the folded part 1.
It also has the disadvantage that it requires connection to 0, which makes the process complicated.

As described above, according to the present invention, when inserting the lining material 9, which is not strong such as SMO, into the conduit 1, the lining material 9 is prevented from being damaged by the inner surface of the conduit 1, etc.
Further, the lining material 9 is not stretched or deformed due to tension, and an excellent lining can be provided.

[Brief explanation of drawings]

FIG. 1 is a central vertical sectional view showing a state in which a lining material is supported and drawn into a strip according to the present invention. FIGS. 2 and 3 are central vertical cross-sectional views showing the steps of the second and third embodiments of the invention, respectively. FIG. 40 is a central vertical cross-sectional view showing the state in which the strip is removed from the pipe line according to the first to third inventions, and FIG. 5 is a central vertical cross-sectional view showing the removing process according to the fourth invention. 1...Pipeline 4...Band-like material 4a...Upper band-like material 4b...Lower band-like material 5...Rotating roller 9...
・Lining material 10...Folded part 2 Indication of incident Title of invention of Patent Application No. 7298 of 1990
Relationship with the case of a person amending a method for drawing lining material into a pipe Patent applicant 4, agent 7-201 Enohonmachi, Suita City, Osaka Prefecture Number of claims increased by amendment No. 2 0 Subject of amendment Description Column 8 for a brief explanation of the drawings, content of amendments

Claims (1)

[Claims] 1. A strip (4) is wrapped around a rotating roller (5) at one end of the pipe (1), and two strips (4a, 4b) extend from the rotating roller (5) to the rear. The tip of the lining material (9) is supported on the upper strip (4a), and while the rotating roller (5) is advanced from the one end of the conduit (1) to approximately the center, While fixedly supporting the rear part of the strip (4a), the lower strip (4b) is pulled into the pipe (1) while being reversed on the rotating roller (5) so that the lower side becomes the upper side, and then While advancing the rotating roller (5) from the center of the pipe (1) to the other end, the rear part of the lower strip (4b) of the two strips (4a, 4b) is While supporting the upper strip (4a) in a fixed manner and inverting the upper strip (4a) with the rotating roller (5) so that the upper side becomes the lower side, the upper strip (4a) is
), the lining material (9) is supported and pulled into the pipe (1), and the tip of the lining material (9) is connected to the other end of the pipe (1) almost simultaneously with the rotating roller (5). , the support of the lining material (9) is released from the strip (4), and then the lower strip (4b) is pulled from one end of the conduit (1) to remove its folded portion (10). ) Method 2 for drawing lining material into a pipe line (1), characterized by removing the strip (4) from the pipe line (1) while inverting it so that the upper side becomes the lower side One end of the pipe line (1) At the same time as wrapping the strip (4) around the rotating roller (5), the rotating roller (5)
The lower strip (4b) of the two strips (4a, 4b) extending rearward from the center is fixedly supported, and the rotating roller (5) is moved from the one end of the conduit (1) to the other end. While advancing toward the end, the upper strip (4a) is reversed from the upper side to the lower side on the rotating roller (5) while the conduit (1
), and when the rotating roller (5) reaches approximately the center of the pipe (1), the lining material (10) is applied to the upper strip (4a) at the one end of the pipe (1). While supporting the tip and advancing the rotating roller (5) to the other end of the conduit (1), the upper strip (4a) is turned over from the upper side to the lower side on the rotating roller (5). The upper strip (4a) and the lining material (9) supported on the strip (4a) are drawn into the pipe (1), and the tip of the lining material (9) is connected to the rotating roller (5). The strip (4) is made to reach the other end of the conduit (1) almost simultaneously.
After that, pull the lower strip (4b) from one end of the pipe (1) and turn it over so that the upper side is the lower side at the folded part (10). Method 3 for drawing lining material into a pipe line, characterized in that the strip (4) is removed from the pipe line (1) while the strip (4) is pulled out from the pipe line (1). 4) and its rotating roller (5)
The lower strip (4b) of the two strips (4a, 4b) extending rearward from the center is fixedly supported, and the upper strip (4a) has a position of the rotating roller (5). The lining material (9) is placed at a distance corresponding to the length of the pipe (1) from
), and the rotary roller (5) is connected to the pipe (1).
) an upper band-shaped object (4a) extending rearward from the rotating roller (5) while advancing from the one end to the other end;
is pulled into the conduit (1) while being reversed from the upper side to the lower side by the rotating roller (5), and the lining material (9) supported on the upper strip (4a) is pulled into the conduit (1). and causing the tip of the lining material (9) to reach the other end of the conduit (1) at substantially the same time as the rotating roller (5);
After releasing the support for the lining material (9) from the strip (4), the lower strip (4b) is pulled from one end of the conduit (1) so that the upper side is 4. A method for drawing a lining material into a conduit (4), which comprises removing the strip (4) from the conduit (1) while inverting it so that it is on the lower side. (5
) to the other end of the pipe (1) and remove the upper strip (
4a) and the lining material (9) supported on the strip (4a) are drawn into the pipe (1), the support of the lining material (9) is released from the strip (4) and the rotating roller ( 5), and remove the strip from one end of the pipe (1) to the other end (
The strip (4) is removed from the conduit (1) by pulling the folded part (10) of 4) and inverting it so that the upper and lower strips (4b) are inserted between them. A method of drawing lining material into the pipe.