JP2000230691A - Piping mending device and piping mending construction method using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a piping mending device and a piping mending construction method using the same which can inexpensively mend piping without destructing a building. SOLUTION: A substantially spherical guide member 10 is arranged on a front of a bendable pipe body 6. First to third branch pipes 11, 12, 13 are arranged on the pipe body 6, while first to third brushes 7, 8, 9 are arranged. A mending agent supplier 2 is arranged on a rear end of the pipe body 6 for supplying the mending agent into the pipe body 6. A turningly moving device 3 is arranged for turning the pipe body 6 and moving it inside piping. It is thus possible to inexpensively mend the piping without destructing a building.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe repair apparatus for repairing a pipe by applying a repair agent to the inner surface of the pipe, and a pipe repair method using the same.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 9, a drain pipe of a high-rise building such as an apartment building or an office building is provided with a large-diameter standing pipe (PS pipe) 51 penetrating each floor and a small-diameter pipe communicating with a room on each floor. The horizontal branch pipe 52 branches off, and drainage from equipment 53 such as a sink, a washroom, and a bathroom merges with the PS pipe 51 from the horizontal branch pipe 52 and is drained. As such a drain pipe, a steel pipe, a ceramic pipe, or the like is used, but there is a problem of water leakage due to rust, cracks, and the like due to aging. On the other hand, recently, due to the prolonged recession, it is strongly desired to extend the life of the building as little as possible at a lower cost than rebuilding an aging building. It is urgent.

[0003]

However, in order to repair the horizontal branch pipe 52 and the PS pipe 51 in the above-mentioned drain pipe, the wall or floor of the building is once demolished, and the pipe is replaced or repaired. After that, the walls and floor had to be repaired again. As described above, repairing the drainage pipe requires a very large-scale construction, which has a problem that the cost is high and the construction period is long.

Therefore, as a method of repairing the inner surface of the pipe, for example, a method of repairing the inner surface of the pipe by spraying a lining agent from a spray nozzle inserted into the pipe,
There has also been proposed a method of lining the inner surface of a pipe by feeding a pig inserted into the pipe.

However, the method of spraying the lining agent has a problem that when inserting the spray nozzle from the drain port, it is very difficult to pass the nozzle through the elbow joint portion of the pipe. Also, the PS pipe 51
When the pipes having different diameters are connected like the horizontal branch pipe 52 and the horizontal branch pipe 52, the distance between the nozzle and the pipe inner surface changes.
There is a problem that the coating film tends to be uneven. further,
At the time of restoration work, there is also a problem that an unpleasant odor reaches the room on another floor and pollutes the surrounding environment.

On the other hand, the method of feeding a pig into a pipe by pressure cannot deal with a pipe having a change in diameter or a branch, and also has a problem that a difference in film thickness is likely to occur between an upper side and a lower side of the pipe. Moreover, it is necessary to work from two directions, the inlet side and the outlet side of the pipe, and it is extremely difficult as a practical problem to repair such a drainage pipe without breaking down the building. Under these circumstances, there has been a strong demand for the development of a pipe repair method that can repair pipes at low cost without breaking down buildings.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a pipe repairing apparatus and a pipe repairing method using the same, which can repair pipes at low cost without breaking down a building. I do.

[0008]

In order to achieve the above object, a pipe repair apparatus according to the present invention is provided with a substantially spherical guide member at the tip of a bendable pipe, and a branch pipe provided on the pipe. A brush is provided, and a repair agent supply means for supplying a repair agent into the tube is provided at a portion on the rear end side of the tube, and a rotation moving means for moving the inside of the pipe while rotating the tube is provided. The point is to have it.

[0009] In the pipe repair method of the present invention, a bendable pipe provided with a branch pipe and a brush is prepared, the pipe is inserted into the pipe, and a repair agent is supplied into the pipe. The gist is to apply the repair agent discharged from the branch pipe to the inner surface of the pipe with a brush by discharging the repair agent from the branch pipe and moving the pipe body while rotating the pipe body.

That is, in the pipe repairing apparatus of the present invention, a branching pipe is provided in the pipe and a brush is provided, and a repair agent supply means for supplying a repairing agent into the pipe at a rear end portion of the pipe. And a rotation moving means for moving the inside of the pipe while rotating the pipe. For this reason, the repair agent discharged from the branch pipe is supplied by supplying the repair agent into the pipe inserted into the pipe and discharging the repair agent from the branch pipe, and moving the pipe body in the pipe while rotating the pipe body. Can be applied to the inner surface of the pipe with a brush. Thus, the inner surface of the pipe can be easily repaired. Also, when inserting the pipe into the pipe, since a substantially spherical guide member is provided at the tip of the bendable pipe, even if there is an elbow joint or a branch, the pipe can be easily inserted into the pipe. Can be inserted. Further, even when pipes having different diameters are connected, the coating film is unlikely to be uneven, and there is almost no influence on other floors or other rooms at the time of repair work, and the surrounding environment is not polluted. Moreover,
The work can be performed from only one of the inlet side and the outlet side of the pipe, and the pipe can be repaired at low cost without breaking down the building.

In the pipe repair apparatus of the present invention, when the brush is replaceable with a cleaning brush or a polishing brush, the inner surface of the pipe is cleaned as a pretreatment for applying a repair agent to the inner surface of the pipe. It is easy to remove rust on the inner surface of the pipe by polishing, cleans the inner surface of the pipe that has been used for many years and has rust and dirt, improves the adhesion of the repair agent, and improves the adhesion of the coating film. be able to. The “polishing brush” is intended to include not only brushes such as wire brushes but also abrasive cloths such as sandpaper.

In the pipe repair apparatus of the present invention, when a plurality of brushes are provided at predetermined intervals in the longitudinal direction of the tube, and the interval between the brushes is set to be longer than the length of the brush, Since the coating film is formed so as to be overcoated with a plurality of brushes, the uniformity of the coating film is improved. Further, since adjacent brushes do not overlap each other, even when repairing a pipe having a relatively small diameter, the pipe body can be smoothly moved and repaired.

In the pipe repair apparatus of the present invention, the length of the branch pipe is shorter than the bristle length of the brush while at least the tip of the branch pipe contacts the inner surface of the pipe while the pipe is inserted into the pipe. When the setting is made such that the repair agent discharged from the tip of the branch pipe is sufficiently supplied to the inner surface of the pipe, and the supplied repair agent is formed on the coating film by a brush, the High uniformity.

[0014] In the pipe repair apparatus of the present invention, the repair agent supply means includes a cylinder filled with the repair agent and a piston for pushing out the repair agent in the cylinder.
When the repair agent is configured to be pushed out by being relatively rotated with respect to the cylinder, when the repair agent supply unit is rotated by the rotation moving unit, only the rotation speed of the piston or the cylinder is changed. Can extrude the repair agent. As described above, the repairing agent can be supplied into the tubular body by a relatively simple mechanism while using the rotational force for rotating the tubular body.

[0015] In the pipe repairing apparatus of the present invention, the rotation moving means may include an endless belt spirally wound around the pipe or a rotating shaft connected to the pipe, and an endless belt while applying tension to the endless belt. And a belt feeding means for feeding the pipe in the longitudinal direction, the rotation of the pipe and the movement in the pipe longitudinal direction can be performed simultaneously and automatically by a relatively simple mechanism.
Further, the operation can be easily switched to the manual operation only by loosening the tension of the endless belt, which is very convenient.

In the pipe repair method of the present invention, a bendable pipe provided with a branch pipe and a brush is prepared, the pipe is inserted into the pipe, and a repair agent is supplied into the pipe. The repair agent discharged from the branch pipe is moved inside the pipe while rotating the pipe body while rotating, so that the repair agent discharged from the branch pipe is applied to the inner surface of the pipe with a brush. Therefore, the inner surface of the pipe can be easily repaired. Also, when inserting the pipe into the pipe,
Since the substantially spherical guide member is provided at the tip of the bendable tube, even if there is an elbow joint or a branch, the tube can be easily inserted into the pipe. Further, even when pipes having different diameters are connected, the coating film is unlikely to be uneven, and there is almost no influence on other floors or other rooms at the time of repair work, and the surrounding environment is not polluted.
Moreover, work can be performed from only one of the inlet side and the outlet side of the pipe, and the pipe can be repaired at low cost without breaking down the building.

In the pipe repair apparatus and the pipe repair method of the present invention, the repair agent is not particularly limited as long as it can be discharged from the branch pipe and can be applied to the inner surface of the pipe with a brush. Can be used.

[0018]

Next, embodiments of the present invention will be described in detail.

FIG. 1 shows an embodiment of the piping repair apparatus of the present invention. The apparatus includes a brushed tube 1, a repair agent supply device 2 connected to a rear end portion (the right side in the drawing) of the brushed tube 1, and a device arranged behind the repair agent supply device 2. Flexible shaft 5 extending rearward from repair agent feeder 2
And a rotation moving device 3 for rotating the. The pipe repair device inserts the brushed tube 1 into a pipe (not shown) to repair the inner surface of the pipe. In the figure, reference numeral 4 denotes a winding machine for winding the flexible shaft 5, and reference numeral 20 denotes a flexible tube for connecting the brushed tube 1 and the repair agent supply device 2.

More specifically, the above-mentioned brushed tube 1
As shown in FIG. 2, a spherical guide member 10 is attached to a distal end (the left side in the drawing) of a tube 6 made of resin and formed to be bendable. At the rear end of the peripheral wall of the tube 6, there are provided three (two in FIG. 1) first branch pipes 11 extending radially. further,
At the substantially central portion in the longitudinal direction, there are provided three (two in FIG. 2) second branch pipes 12 which also spread radially. Similarly, three (three in the figure, only three) third branch pipes 13 are also provided at the distal end, which radially extend.

A first brush 7 is attached to a portion of the peripheral wall of the pipe 6 slightly near the leading end of the first branch pipe 11, and a second brush 8 is fitted to a portion slightly closer to the tip of the second branch pipe 12.
Is attached, and a third brush 9 is attached to a portion of the third branch pipe 13 slightly near the tip. As shown in FIG. 3, the first to third brushes 7, 8, and 9 are provided such that three bundles of bristles spread radially. And each hair foot is said 1st-3rd branch pipe 11,12,
13 are arranged adjacent to each other.

The first and third brushes 7, 9 are
The three brushes are arranged so that the direction in which the bristles spread is the same, and the second brushes 9 disposed between the first and third brushes 7 and 9 are such that the three bristles have the first bristles respectively. And the third brushes 7, 9 are arranged between the bristle feet. The same applies to the positional relationship between the first to third branch pipes 11, 12, and 13. The first brush 7 has a hair foot made of a synthetic resin filament, and the second and third brushes 8 and 9 have a hair foot made of animal hair. The distance L1 between the first to third brushes 7, 8, 9 is set to be longer than the length L2 of the first to third brushes 7, 8, 9.

Further, the first to third brushes 7, 8, 9
Is detachable from the tube 6 together with the ring member 27. Then, instead of the first to third brushes 7, 8, and 9, a cleaning brush or a polishing brush (not shown) is used.
Can be attached.

The first to third branch pipes 11, 12, 1
Each of the lengths 3 is set to such a length that the tip of each of the branch pipes 11, 12, 13 abuts on the inner surface of the pipe when the brushed pipe 1 is inserted into the pipe. The lengths of the first to third branch pipes 11, 12, and 13 are set to be shorter than the lengths of the adjacent first to third brushes 7, 8, and 9, respectively. Furthermore, the above first to first
As shown in FIG. 4, a plurality of cuts 14 are provided at the distal end portions of the third branch pipes 11, 12, and 13, extending from the opening edge of the distal end toward the root side. In FIG.
Is a positioning member for positioning the tube 6 substantially at the center when the brushed tube 1 is inserted into the pipe.

As shown in FIG. 5, the repair agent supply device 2 is slidably inserted into a cylinder 17 filled with the repair agent 16 and the cylinder 17, and the repair agent 16 is removed from the distal end opening 18. And an extruding piston 19.
The piston 19 is attached to a tip of a screw shaft 21 provided with a screw. The screw shaft 21 is engaged with a lid member 22 provided with a screw hole 23. As a result, the piston 19 and the screw shaft 21 are relatively rotated with respect to the cylinder 17 and the lid member 22 so that the screw shaft 21
Works, the screw shaft 21 and the piston 19 move forward toward the distal end, and the cylinder 1
The repair agent 16 inside 7 is extruded.

As shown in FIG. 6, the rotation moving device 3 includes an endless belt 24 spirally wound around a flexible shaft (rotating shaft) 5 and an endless belt 24 while applying tension to the endless belt 4. And a belt feed roller 25 that feeds the belt in the longitudinal direction. Thus, by feeding the endless belt 24 while applying tension to the endless belt 4, the flexible shaft 5 rotates helically, rotates about the axis, and moves in the longitudinal direction. The rotational movement of the flexible shaft 5 causes the brushed tube 1 connected to the flexible shaft 5 via the screw shaft 21, the repair agent supply device 2, and the flexible tube 20 to rotate. On the other hand, the interval between the belt feed rollers 25 is narrowed so that the endless belt 24
When the tension of the flexible shaft 5 is reduced, the flexible shaft 5 becomes free and can be rotated or moved manually. In the figure, reference numeral 26 denotes a guide roller for guiding the flexible shaft 5.

The pipe repair method of the present invention using the above pipe repair apparatus is performed, for example, as follows. That is, first, the first to third brushes 7, 8, 9 are replaced with cleaning brushes, and as shown in FIG.
Then, the guide member 10 of the brushed tube 1 is inserted, and the brushed tube 1 is inserted into the horizontal branch tube 52 while the flexible tube 20 is gripped and slightly rotated. At this time, since the spherical guide member 10 is attached to the tip of the brushed tube 1 and the tube 6 is bendable, the tube can easily pass through a bent portion such as a junction or an elbow joint. Then, the brushed tube 1 is further pushed in, and as shown in FIG. 7 (b), inserted through the PS pipe 51, and the brushed tube 1 is inserted down to the horizontal branch pipe 52.

Next, the rotating / moving device 3 is driven while flowing water or a washing liquid in the water distribution pipe, and the flexible shaft 5 is moved in the root direction while rotating, so that the brushed tube 1 is moved in the drawing direction while rotating. Then, the inner surface of the pipe is cleaned.

Next, the cleaning brush is replaced with a polishing brush, and after pushing the brushed tube 1 in the same manner as described above, the rotation moving device 3 is driven to rotate the brushed tube 1 while rotating. By moving the pipe in the drawing direction, rust and the like on the inner surface of the pipe are removed by polishing. In this way, by pre-processing the inner surface of the pipe by washing and polishing, the inner surface of the pipe that has been used for many years and has been rusted and stained is cleaned, and the repair agent is improved and the adhesion of the coating film is improved. Can be.

After that, the polishing brushes are exchanged for the first to third brushes 7, 8, and 9, and the brushed tube 1 is replaced in the same manner as described above.
Into the horizontal branch pipe 52 downstairs. Next, the rotation moving device 3 is driven to move the flexible shaft 5 in the root direction while rotating, so that the brushed tube 1 is moved in the drawing direction while rotating. Then, by applying a brake to the rotation of the cylinder 17 of the repair material feeder 2 that rotates together with the flexible shaft 5, the rotation speed of the cylinder 17 and the screw shaft 21 is changed, and the piston 19 is relatively rotated with respect to the cylinder 17. The repair agent 16 is extruded from the cylinder 17 and the repair agent 1
6 to the pipe 6, and the first to third branch pipes 11, 1
The ink is discharged from the front ends of the second and the third.

Further, by moving the brushed tube 1 while rotating it, the first to third branch pipes 1 are moved.
The repair agent 16 discharged from the tips of 1, 12, 13 is supplied to the inner surface of the pipe, and is applied to the inner surface of the pipe by the first to third brushes 7, 8, 9. At this time, since the cuts 14 are formed at the distal ends of the first to third branch pipes 11, 12, 13, the repair agent 16 is provided between the cuts 14.
The protruding part and the repair agent 16 are smoothly supplied to the inner surface of the pipe. In addition, since the first brush 7 is made of strong synthetic resin filaments, the discharged repair agent 16 can be strongly rubbed against the inner surface of the pipe. In addition, since the second and third brushes 8 and 9 are supple animal hair, the rubbed repair agent 16 can be uniformly applied to the inner surface of the pipe. Thus, the first to third brushes 7,
8, 9 act on the rough coating, semi-finishing, and finishing, respectively, and can form a uniform coating film.

Thereafter, the brushed tube 1 is further moved while rotating to form a coating film. When the inner surface of the PS tube 51 is completed, a coating film is formed on the inner surface of the horizontal branch tube 52. At this time, as shown in FIG.
Even if there is a change in diameter from the horizontal branch pipe 52 to the small-diameter horizontal branch pipe 52, since the first to third brushes 7, 8, and 9 form a coating film while being flexible, unevenness of the coating film hardly occurs. In addition, the first
Since the interval between the first to third brushes 7, 8, 9 is set longer than the length of the bristle feet of the first to third brushes 7, 8, 9, as shown in FIG. The brushed tube 1 can be smoothly moved to form a coating film even at an elbow joint portion of a pipe having a small diameter without overlapping each other.

As described above, according to the above apparatus and method, the inner surface of the pipe can be easily repaired. Also, there is almost no effect on other floors or other rooms during restoration work,
It does not pollute the surrounding environment. Moreover, the work can be performed only from the inlet side of the pipe, and the pipe can be repaired at low cost without breaking down the building.

In each of the above embodiments, three sets of brushes are attached. However, the present invention is not limited to this, and one set, two sets, or four or more sets may be used. Further, the first to third brushes 7, 8, and 9 are configured such that three bundles of hair feet are radially attached to the tubular body 6, but the present invention is not limited to this. It may be a bundle or more, or may be attached obliquely to the axis of the tube 6. Further, in the repair material supply device 2, the piston 19 is relatively rotated with respect to the cylinder 17 by applying a brake to the rotation of the cylinder 17 of the repair material supply device 2 co-rotating with the flexible shaft 5. However, the invention is not limited thereto, and the cylinder 17 and the screw shaft 21 may be individually driven to rotate. Further, in the rotation moving device 3, the endless belt 24 is wound around the flexible shaft. However, the present invention is not limited to this.
It may be wound around the cylinder 17 or the like of the repair agent supply device 2.
In the above-described embodiment, the guide member 10 is formed in a spherical shape. However, the present invention is not limited to this. It is the purpose. Even in these cases, the same operation and effect can be obtained.

[0035]

As described above, according to the pipe repair apparatus of the present invention, the repair agent is supplied into the pipe inserted into the pipe, the repair agent is discharged from the branch pipe, and the pipe body is rotated. While moving in the pipe, the repair agent discharged from the branch pipe can be applied to the inner surface of the pipe with a brush. Thus, the inner surface of the pipe can be easily repaired. Also, when inserting the pipe into the pipe, since a substantially spherical guide member is provided at the tip of the bendable pipe, even if there is an elbow joint or a branch, the pipe can be easily inserted into the pipe. Can be inserted. Further, even when pipes having different diameters are connected, the coating film is unlikely to be uneven, and there is almost no influence on other floors or other rooms at the time of repair work, and the surrounding environment is not polluted. Moreover, work can be performed from only one of the inlet side and the outlet side of the pipe, and the pipe can be repaired at low cost without breaking down the building.

In the pipe repair apparatus of the present invention, when the brush is replaceable with a cleaning brush or a polishing brush, the inside of the pipe is cleaned as a pretreatment for applying a repair agent to the inside of the pipe. It is easy to remove rust on the inner surface of the pipe by polishing, cleans the inner surface of the pipe that has been used for many years and has rust and dirt, improves the adhesion of the repair agent, and improves the adhesion of the coating film. be able to.

In the pipe repair apparatus of the present invention, when a plurality of brushes are provided at predetermined intervals in the longitudinal direction of the tube, and the interval between the brushes is set to be longer than the length of the brush, Since the coating film is formed so as to be overcoated with a plurality of brushes, the uniformity of the coating film is improved. Further, since adjacent brushes do not overlap each other, even when repairing a pipe having a relatively small diameter, the pipe body can be smoothly moved and repaired.

In the pipe repair apparatus of the present invention, the length of the branch pipe is shorter than the bristle length of the brush while at least the tip of the branch pipe abuts on the pipe inner surface with the pipe inserted into the pipe. When the setting is made such that the repair agent discharged from the tip of the branch pipe is sufficiently supplied to the inner surface of the pipe, and the supplied repair agent is formed on the coating film by a brush, the High uniformity.

In the pipe repair apparatus of the present invention, the repair agent supply means includes a cylinder filled with the repair agent and a piston for pushing out the repair agent in the cylinder, wherein the piston is:
When the repair agent is configured to be pushed out by being relatively rotated with respect to the cylinder, when the repair agent supply unit is rotated by the rotation moving unit, only the rotation speed of the piston or the cylinder is changed. Can extrude the repair agent. As described above, the repairing agent can be supplied into the tubular body by a relatively simple mechanism while using the rotational force for rotating the tubular body.

In the pipe repairing apparatus of the present invention, the rotation moving means includes an endless belt spirally wound around the pipe or a rotating shaft connected to the pipe, and an endless belt while applying tension to the endless belt. And a belt feeding means for feeding the pipe in the longitudinal direction, the rotation of the pipe and the movement in the pipe longitudinal direction can be performed simultaneously and automatically by a relatively simple mechanism.
Further, the operation can be easily switched to the manual operation only by loosening the tension of the endless belt, which is very convenient.

Further, according to the pipe repair method of the present invention, the pipe inner surface can be easily repaired. Also, when inserting the pipe into the pipe, since a substantially spherical guide member is provided at the tip of the bendable pipe, even if there is an elbow joint or a branch, the pipe can be easily inserted into the pipe. Can be inserted. Further, even when pipes having different diameters are connected, the coating film is unlikely to be uneven, and there is almost no influence on other floors or other rooms at the time of repair work, and the surrounding environment is not polluted. Moreover, work can be performed from only one of the inlet side and the outlet side of the pipe, and the pipe can be repaired at low cost without breaking down the building.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing a pipe repairing apparatus according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a brushed tube of the pipe repairing apparatus.

FIGS. 3A and 3B are diagrams illustrating the arrangement of brushes of the pipe repairing apparatus as viewed from the front, where FIG. 3A is a first brush, FIG. 3B is a second brush, and FIG. 3C is a third brush.

FIG. 4 is a perspective view showing a distal end portion of a branch pipe of the pipe repair device.

FIG. 5 is a sectional view showing a repair agent supply device of the pipe repair device.

FIG. 6 is an explanatory view showing a rotary moving device of the pipe repairing device.

FIG. 7 is an explanatory view showing a pipe repair method of the present invention;
(A) is a state where the pipe is viewed from above, and (b) is a state where the pipe is viewed from the side.

FIG. 8 is an explanatory view showing a pipe repair method of the present invention;
(A) is a state where the pipe repair device passes through a place where the diameter of the pipe changes, and (b) is a state where it passes through an elbow joint.

FIG. 9 is an explanatory diagram showing a drain pipe of a high-rise building.

[Explanation of symbols]

 Reference Signs List 2 repair agent supply device 3 rotation moving device 6 tube 7 first brush 8 second brush 9 third brush 10 guide member 11 first branch pipe 12 second branch pipe 13 third branch pipe

Claims (7)

[Claims] 1. A substantially spherical guide member is provided at the tip of a bendable tube, a branch pipe is provided on the tube, and a brush is provided. The tube is provided at a rear end portion of the tube. A repair agent supply means for supplying the repair agent to
A pipe repairing apparatus, comprising: a rotation moving means for moving inside the pipe while rotating the pipe. 2. The pipe repair apparatus according to claim 1, wherein the brush is replaceable with a cleaning brush or a polishing brush. 3. The pipe repairing device according to claim 1, wherein a plurality of brushes are provided at predetermined intervals in a longitudinal direction of the tube, and an interval between the brushes is set longer than a length of the brush. . 4. The length of the branch pipe is set such that at least the tip of the branch pipe abuts on the inner surface of the pipe while the pipe is inserted into the pipe, and is shorter than the bristle length of the brush. The pipe repair device according to claim 1. 5. The repair agent supply means includes a cylinder filled with the repair agent and a piston for pushing out the repair agent in the cylinder, wherein the piston is rotated relatively to the cylinder to push out the repair agent. The pipe repairing device according to any one of claims 1 to 4, wherein the piping repairing device is configured as follows. 6. An endless belt spirally wound around the tube or a rotating shaft connected to the tube, and a belt for feeding the endless belt in a longitudinal direction while applying tension to the endless belt. The pipe repair apparatus according to any one of claims 1 to 5, further comprising a feeding unit. 7. A bendable pipe provided with a branch pipe and a brush is provided, the pipe is inserted into a pipe, a repair agent is supplied into the pipe, and the repair agent is discharged from the branch pipe. A method of repairing a pipe, wherein the repair agent discharged from the branch pipe is applied to the inner surface of the pipe by brush by moving the pipe while rotating the pipe.