JP4963427B2 - Rehabilitation method for existing pipes, jigs, etc. - Google Patents

Description

  The present invention relates to a method for rehabilitating an existing pipe rod, a magnet placement jig, a mounting tool, a magnet holster, and a repair member. In particular, the present invention relates to a method for rehabilitating an existing pipe rod characterized by drilling a rehabilitation material used when repairing an existing pipe rod having a small diameter main pipe and a small diameter mounting pipe, a magnet placement jig, a mounting tool, The present invention relates to a magnet holster and a repair member.

  Conventionally, pipes (for example, sewer pipes and rainwater pipes) are buried in the ground such as roads. FIG. 1 shows an example of a sewage pipe basin 10 including a main pipe 1, a mounting pipe 2, and a sewage basin 3. In this sewer pipe 10, a sewage tub 3 provided in a household premises is connected to the main pipe 1 through a mounting pipe 2, and household miscellaneous waste water is connected to the main pipe from the sewage tub 3 through the mounting pipe 2. 1 is discharged.

  Such existing pipes are subject to aging due to long-term use, and damage and water leakage may occur due to heavy vehicle traffic and vibration due to earthquakes. In particular, the sewage pipe 10 is an important lifeline. If the main pipe 1 of the sewage pipe 10 is damaged or leaked, it may interfere with the lives of ordinary citizens. Construction to repair and rehabilitate the water pipe tub 10 is required.

  This pipe rehabilitation method includes excavation method of excavating the ground and removing the damaged existing pipe, then laying a new pipe, and repairing the inner peripheral surface of the existing pipe without excavating the ground. Non-cutting methods are known. In the open-cut method, in order to excavate the ground, it is necessary to block the traffic on the road, and the construction period is also a problem. Therefore, when publicity is given priority in places such as main roads, residential roads, and places where a wide variety of pipes are crossed, it is difficult to repair existing pipes using the excavation method. On the other hand, in the non-open-cut method, it is not necessary to dig up existing pipes, and the space required for construction can be reduced. Therefore, it is possible to quickly repair damaged parts of existing pipes while minimizing the impact on road traffic.

  As a non-open-cut type rehabilitation method, a method of repairing the entire circumference of the inner peripheral surface of an existing pipe is known. Specifically, the nonwoven fabric impregnated with uncured resin (rehabilitated material) is drawn into the existing pipe in a folded state, or the rehabilitated material is inverted by air pressure or water pressure and arranged on the entire circumference of the existing pipe. Then, the rehabilitation material is brought into close contact with the inner peripheral surface of the existing pipe by pressurization by air pressure or water pressure. While maintaining this state, the resin of the rehabilitation material is cured with warm water, steam, ultraviolet rays, etc., and the existing pipe is repaired. As a result, as shown in FIG. 21, a new pipe rod is constructed with the rehabilitation material 6 in the existing main pipe 1.

  As another rehabilitation method, as shown in FIG. 22, a rehabilitation pipe 71 is constructed by winding a strip of vinyl chloride around the existing main pipe 1 to form a circular pipe. A method of repairing the existing main pipe 1 by filling a gap between the main pipe 1 and the rehabilitation pipe 71 with a back-filling material 75 such as mortar is known.

  By the way, when the existing main pipe 1 is repaired by the rehabilitation method as described above, the connection part 5 between the main pipe 1 and the attachment pipe 2 is blocked by the rehabilitation material 6 and the rehabilitation pipe 71, so that the connection part 5 It is necessary to make the main pipe 1 and the attachment pipe 2 communicate with each other by forming perforations. For this reason, for example, a perforation apparatus that inserts a flexible shaft having a perforation blade at the tip from the attachment tube 2 side and perforates the rehabilitation material 6 or the rehabilitation tube 71 from the attachment tube 2 side has been put into practical use (for example, Patent Documents). 1).

  However, when the distance between the sewage basin 3 and the main pipe 1 is long and the attachment pipe 2 is long, or when the attachment pipe 2 is complicatedly wound, the perforating apparatus of Patent Document 1 cannot be used. Furthermore, when the house is demolished and the sewage basin 3 is removed, the perforation apparatus of Patent Document 1 cannot be used even in the case of a so-called unknown culvert. In such a case, it is necessary to form a perforation at a position where the attachment pipe 2 is located from the existing main pipe 1 side.

Moreover, most of the existing main pipes 1 are pipe tubs having a small diameter (for example, a diameter of 80 cm or less) that an operator cannot enter. For this reason, a drilling apparatus that carries a robot car having a camera for position confirmation and a cutter for drilling into the main pipe to form a drill has been put into practical use (for example, see Patent Document 2).
Japanese Patent Laid-Open No. 7-1585 Japanese Patent Laid-Open No. 10-231955

  As shown in FIG. 21 and FIG. 22, when the existing main pipe 1 is rehabilitated, the position where the attachment pipe 2 is located (the connecting portion 5 of the attachment pipe 2) is located on the main pipe 1 side using a camera of a robot car or the like. Since it becomes an invisible part which cannot be confirmed from, it becomes difficult to specify the position. For this reason, conventionally, it is necessary to form a hole by predicting the position where the mounting pipe 2 is located by measuring the distance from a manhole or the like, which causes problems such as misalignment of the hole or forgetting of the hole. In addition, after making a small hole and confirming the position where the mounting pipe 2 is located, a method of increasing the diameter of the hole and connecting the mounting pipe 2 and the main pipe 1 is also being studied. There arises a problem that it takes a long working time.

  Incidentally, in Patent Document 2, there is a method in which a magnet is inserted into the mounting pipe 2 (service pipe) side, and metal powder is adsorbed to the wall surface on the newly installed main pipe 1 side by a magnetic force to specify the position of the mounting pipe 2. It is disclosed. In the method of this patent document 2, since the magnetic force of the magnet is weakened by passing through the wall surface of the main tube 1, the metal powder cannot be reliably adsorbed unless the metal powder is brought close to or pressed against the wall surface. . Here, in the case of rehabilitating a large-diameter pipe rod that an operator can enter, the operator can attach metal powder to the wall surface of the main pipe 1 and specify the position of the attachment pipe 2. On the other hand, when rehabilitating small-diameter pipes, it is necessary to use a robot vehicle to adsorb metal powder. In this case, if the distance from the wall surface of the main pipe 1 is increased, the magnetic force of the magnet is weakened and the metal powder is not adsorbed. Therefore, the robot car is used to approach the position where the metal powder can be adsorbed, or the metal powder is pressed against the wall surface. Although necessary, metal powder is difficult to handle and difficult to adsorb accurately.

  Further, Patent Document 2 does not disclose a description regarding the installation position of the magnet in the attachment pipe. Here, for example, when the magnet is disposed at a position deviated from the center of the attachment tube, there arises a problem that the perforation cannot be accurately formed in accordance with the attachment tube.

  The present invention has been made in view of the above-mentioned problems, and a first object is to provide an existing drill capable of accurately and quickly forming a perforation for communicating with the main pipe at a connection portion between the main pipe and the mounting pipe. It is to provide a method for rehabilitating the tube. A second object is to provide a magnet placement jig that can accurately place a standby-side magnet in a method for rehabilitating an existing pipe. A third object is to provide a mounting tool that can securely mount the magnet placement jig to the connecting portion between the main pipe and the mounting pipe. Moreover, the 4th objective is to provide the magnet holster which can make a search side magnet piece adsorb | suck to the position corresponding to a connection part in the rehabilitation method of the existing pipe rod. Furthermore, the fifth object is to provide a repair member that can reliably close a gap formed in a connection portion between a main pipe and a mounting pipe in a method for rehabilitating an existing pipe rod.

In order to solve the above-mentioned problem, the invention according to claim 1 repairs an existing pipe rod having a main pipe buried in the ground and a mounting pipe connected to the main pipe in an uncut state. A method for rehabilitating an existing pipe for a magnet placement step of placing a standby side magnet at a position that becomes the center of the mounting pipe at a connection portion between the main pipe and the mounting pipe, and the main pipe Use the magnetic force of the stand-by magnet at a position corresponding to the repairing step in which the rehabilitation material is arranged over the entire circumference of the inner peripheral surface to be repaired, and the connection portion of the mounting pipe blocked by the rehabilitation material. Then, a magnet adsorbing step for adsorbing the exploration-side magnet piece through the rehabilitation material, and using the exploration-side magnet piece as a mark, the exploration-side magnet piece is aligned with a central position to drill the rehabilitation material. look including a drilling step of performing, in the magnet arrangement step, the collected Formed in a ring shape with the same outer diameter as the inner diameter of the attachment tube, with a ring member with a part cut away, and provided at multiple locations inside the ring member, mounted to reduce the diameter of the ring member A holding part for holding the tool for use, and a magnet placement jig in which the standby side magnet is provided via a wire in the center of the ring member. The gist is a method for rehabilitating existing pipes, which is characterized by the arrangement .

  According to the first aspect of the present invention, in the magnet placement step, the standby side magnet is placed at a position that becomes the center of the attachment pipe at the connection portion between the main pipe and the attachment pipe. In the subsequent repair process, the main pipe is repaired by arranging the rehabilitation material over the entire circumference of the inner peripheral surface of the main pipe. In this case, the connection part between the main pipe and the mounting pipe is blocked by the rehabilitation material, but the standby magnet is arranged at the center of the mounting pipe. Using the magnetic force of the side magnet, the exploration side magnet piece can be adsorbed through the rehabilitation material. In this magnet adsorption process, since the exploration side magnet piece is used instead of the metal powder as in the prior art, the magnetic force acting with the standby side magnet is sufficiently secured, and the exploration is performed from a relatively remote position. The side magnet pieces can be easily adsorbed. Further, the exploration-side magnet piece is accurately attracted to a position that becomes the center of the mounting tube. Therefore, in the drilling process, drilling is performed on the rehabilitated material in a state where the exploration-side magnet piece is aligned with the center position, thereby accurately and quickly forming a drill for communicating with the main pipe at the connection portion of the mounting pipe. be able to. Furthermore, since the exploration-side magnet piece is not as fine as metal powder, it can be easily collected after the formation of the perforations.

According to a second aspect of the present invention , in the first aspect of the present invention, in the magnet arranging step, a plurality of claws that are detachably attached to a self-propelled robot car having a camera and are hooked on a hooking portion of the ring member. Using a mounting tool provided with a member, the diameter of the ring member is reduced by constricting the claw member, the ring member is disposed at the connection portion confirmed by the camera, and then the claw member is expanded. Thus, the diameter of the ring member is expanded, and the magnet placement jig is attached to the connection portion.

The invention according to claim 3 is a method for rehabilitating an existing pipe for repairing an existing pipe having a main pipe buried in the ground and a mounting pipe connected to the main pipe in an uncut state. In the connecting portion between the main pipe and the attachment pipe, a magnet arrangement step of arranging a standby side magnet at a center position of the attachment pipe, and an inner peripheral surface of the main pipe to repair the main pipe The repairing step of arranging the rehabilitation material over the entire circumference, and the position corresponding to the connection portion of the attachment pipe blocked by the rehabilitation material, using the magnetic force of the standby side magnet, through the rehabilitation material A magnet adsorbing step for adsorbing the exploration-side magnet piece, and a drilling step for drilling the rehabilitated material in a state where the exploration-side magnet piece is aligned with a center position using the exploration-side magnet piece as a mark, In the magnet adsorption process, a self-propelled robot car with a camera A plurality of storage recesses that are detachably attached to store the exploration-side magnet pieces one by one, and one storage recess of the plurality of storage recesses is selectively opened, and the remaining storage recesses are closed. A magnet holding member having a cover to be moved, and the magnet holding member is moved so that an exploration side magnet piece in a storage recess opened in the magnet holding member approaches the standby side magnet disposed in the connection portion The gist of the present invention is a method for rehabilitating an existing pipe rod, wherein a magnet holster provided with a moving mechanism is used to attract the probe-side magnet piece.

The invention according to claim 4 is a method of rehabilitating an existing pipe for repairing an existing pipe having a main pipe buried in the ground and a mounting pipe connected to the main pipe in an uncut state. A magnet placement jig used for placing a stand-by magnet at a position that becomes the center of the attachment pipe at the connection portion between the main pipe and the attachment pipe when performing the magnet placement step in In order to reduce the diameter of the ring member, the ring member is formed in a ring shape having an outer diameter that is the same as the inner diameter of the mounting tube, and is provided at a plurality of locations inside the ring member. A magnet placement jig comprising: a hook portion for hooking a mounting tool; and the standby magnet is provided in the center of the ring member via a wire. To do.

  According to the magnet arrangement jig of the fourth aspect, the standby side magnet is provided via the wire at the center of the ring-shaped ring member having the same outer diameter as the inner diameter of the attachment pipe. In addition, the ring member is partially cut away, and latching portions are provided at a plurality of locations inside the ring member. In the magnet arrangement step, after the mounting tool is hooked on the plurality of hooking portions of the ring member, the diameter of the ring member can be reliably reduced by narrowing the mounting tool. Then, after the ring member is reduced in diameter, the ring member is inserted into the attachment pipe and disposed at the connection portion with the main pipe, and then the diameter of the ring member is increased by expanding the mounting tool. In this case, the ring member is the same as the inner diameter of the mounting pipe, and the magnet placement jig is fixed to the connection portion between the main pipe and the mounting pipe, and the standby side magnet is securely placed at the center of the mounting pipe. Can do.

  According to a fifth aspect of the present invention, there is provided a mounting tool that is used to mount the magnet placement jig according to the fourth aspect to the connecting portion and is detachably attached to a self-propelled robot car having a camera. A plurality of claw members that are hooked to a hook portion of the ring member, the ring member is reduced in diameter by narrowing the claw member, and the connection portion confirmed by the camera is The gist of the mounting tool is characterized in that after disposing the ring member, the diameter of the ring member is expanded by expanding the claw member, and the magnet placement jig is mounted on the connecting portion.

  According to the mounting tool according to claim 5, in a state where the claw member is attached to a self-propelled robot car having a camera, a plurality of claw members are engaged with the engagement portions of the ring member, The diameter of the ring member can be reduced by constricting. And in the main pipe which an operator cannot enter, a robot car can be moved, a connection part of an attachment pipe can be checked with a camera, and a ring member can be arranged in the connection part. Moreover, after arrangement | positioning of a ring member, the diameter of a ring member can be expanded by expanding each nail | claw member, and the jig | tool for magnet arrangement | positioning can be attached to a connection part. Therefore, by using this mounting tool, even if the main pipe cannot be entered by the operator, the magnet placement jig can be securely mounted from the inside of the main pipe to the connecting portion of the mounting pipe.

The invention according to claim 6 is a method of rehabilitating an existing pipe for repairing an existing pipe having a main pipe buried in the ground and a mounting pipe connected to the main pipe in an uncut state. In the magnet adsorbing step, the magnetic side of the standby side magnet arranged at the center of the mounting pipe at the connecting portion between the main pipe and the mounting pipe is used, and the exploration side magnet is passed through the rehabilitation material. A magnet holster that is used to adsorb pieces and is detachably attached to a self-propelled robot car having a camera, and a plurality of storage recesses for storing the search side magnet pieces one by one, A magnet holding member having a cover for selectively opening one of the plurality of storage recesses and closing the remaining storage recesses, and an exploration side magnet piece in the storage recess opened in the magnet holding member Placed at the connection Further comprising a moving mechanism as its gist the magnet holster, characterized in that the moving the magnet holding member so as to approach the waiting-side magnet.

  According to the magnet holster described in claim 6, the exploration-side magnet pieces are stored one by one in the plurality of storage recesses in the magnet holding member, and one storage recess among the plurality of storage recesses is selected by the cover. Open. In the magnet adsorption process, the magnet holster is attached to a self-propelled robot car having a camera, and the robot car is moved while confirming the position with a camera in the main pipe where an operator cannot enter. Then, the magnet holding member is moved by the moving mechanism so that the exploration-side magnet piece in the opened storage recess approaches the standby-side magnet disposed at the connection portion between the main pipe and the attachment pipe. As a result, the exploration-side magnet piece is attracted from the storage recess by the magnetic force of the standby-side magnet, and is attracted to the standby-side magnet via the rehabilitation material. Further, the magnet holding member stores the exploration-side magnet pieces in the plurality of storage recesses, respectively, and changes the storage recess opened by the cover to bring the magnet holding member closer to the position corresponding to the connection portion. The exploration-side magnet pieces that serve as landmarks can be sequentially attracted. In this way, it is not necessary to carry out the self-propelled robot car from the main pipe every time one exploration side magnet piece is attracted, and the exploration side magnet piece can be quickly placed at a position corresponding to a plurality of connecting portions. Can be adsorbed.

As described above in detail, according to the first to third aspects of the present invention, an existing pipe rod capable of accurately and quickly forming a hole for communicating with the main pipe at the connection portion between the main pipe and the mounting pipe. A rehabilitation method can be provided. Moreover, according to the invention of Claim 4 , the jig for magnet arrangement | positioning which can arrange | position a standby side magnet correctly in the connection part of a main pipe and an attachment pipe can be provided. Further, according to the invention described in claim 5, it is possible to provide an optimal mounting tool for mounting the magnet placement jig described in claim 4. According to the sixth aspect of the present invention, the exploration-side magnet piece can be attracted to a position corresponding to the connecting portion .

[First Embodiment]

  DESCRIPTION OF EMBODIMENTS A first embodiment embodying the present invention will be described below in detail with reference to the drawings.

  In this embodiment, as shown in FIG. 1, non-open cutting for repairing an inner peripheral surface of a sewer pipe (existing pipe rod) 10 including an existing main pipe 1, a mounting pipe 2 and a sewage tank 3 without excavating the ground. The method of rehabilitation is adopted. In the rehabilitation method of the present embodiment, the damaged part is repaired by attaching the rehabilitation material to the entire circumference in the main pipe 1. By this repair, as shown in FIG. 2, the connecting portion 5 between the main pipe 1 and the mounting pipe 2 is blocked by the rehabilitation material 6, so the position of the connecting portion 5 between the main pipe 1 and the mounting pipe 2 is changed. The main pipe 1 and the mounting pipe 2 are made to communicate with each other by specifying a pair of permanent magnet pieces (standby side magnet piece 8 and exploration side magnet piece 9) and forming a perforation at the position from the main pipe 1 side. I am doing so. Note that the standby side magnet piece 8 and the exploration side magnet piece 9 are confirmed to be attracted to each other by their magnetic force, and the both surfaces 8a and 9a are colored (see FIG. 3). By coloring the magnet pieces 8 and 9, the magnet pieces 8 and 9 can be arranged so that the same poles (N pole-N pole, S pole-S pole) are not opposed and repelled. . Moreover, as each magnet piece 8 and 9, permanent magnets, such as a neodymium magnet with comparatively strong magnetic force, are used.

  FIG. 4 shows a magnet placement jig 11 for placing the standby-side magnet piece 8 from the attachment tube 2 side at the connection portion 5 between the main tube 1 and the attachment tube 2. FIG. 5 shows a magnet holster 12 for disposing the exploration-side magnet piece 9 from the main pipe 1 side at the connecting portion 5. Further, FIG. 6 shows a robot car 13 for drilling for forming a hole in the connecting portion 5.

  As shown in FIG. 4, the magnet placement jig 11 includes a water-stopping packer 15 that swells in a cylindrical shape in accordance with the shape of the mounting pipe 2, and is placed on the front end (main pipe side end). The side magnet piece 8 is fixed. The packer 15 is a rubber bag formed in a cylindrical shape, and has a diameter smaller than the inner diameter of the mounting tube 2 when no fluid (specifically, air) is supplied to the inside. A hose 16 for supplying air is connected to the packer 15, and when air is supplied from the air pump 17 to the inside of the packer 15 via the hose 16, it is about the same as or larger than the inner diameter of the mounting pipe 2. The packer 15 swells until it becomes.

  The magnet placement jig 11 is inserted into the attachment tube 2 from the sewage basin 3 in a state where no air is supplied to the packer 15. The magnet placement jig 11 (packer 15) is inserted up to the connecting portion 5 with the main pipe 1 by being pushed in using a rehabilitation work bar (not shown) that can be bent relatively freely. . Thereafter, air is supplied to inflate the packer 15, whereby the magnet placement jig 11 is fixed to the connection portion 5 with the main pipe 1, and the connection portion 5 is positioned at the center of the attachment tube 2. A standby magnet piece 8 is arranged.

  As shown in FIG. 5, the magnet holster 12 is detachably attached to a self-propelled robot car 22 having a camera 21. The robot vehicle 22 includes a vehicle body 25 having a wheel 24 and a drive motor (not shown) for driving the wheel 24, and a movable head unit 26 provided at the tip of the vehicle body 25. In the robot vehicle 22, the vehicle body 25 and the movable head portion 26 are connected via a connecting member 27, and the distal end side of the movable head portion 26 is provided so as to be rotatable in the vertical direction with the connecting member 27 as a fulcrum. . Further, an attachment mounting portion 28 is provided at the tip of the movable head portion 26, and the magnet holster 12 is mounted on the attachment mounting portion 28. A rotation mechanism 29 is provided in the attachment mounting portion 28, and the magnet holster 12 is rotated by the rotation mechanism 29.

  As shown in FIGS. 5 and 7, the magnet holster 12 includes a substantially cylindrical support member 31 whose base end is attached to the attachment attachment portion 28, and a magnet holding member fixed to the distal end portion of the support member 31. Device 32 (magnet holding member). In the present embodiment, the rotation mechanism 29 of the attachment mounting portion 28 causes the horizontal direction (the rotational direction around the axis of the support member 31) and the vertical direction (the rotational direction about the base end portion of the support member 31 as a fulcrum). The magnet holster 12 is configured to rotate.

  The magnet holder 32 includes a disc-shaped main body 34 and a cover 35 that covers the main body 34, and a storage recess 36 that opens to the outside in the radial direction is formed on the side surface of the main body 34 at a predetermined interval in the circumferential direction. A plurality (eight in this embodiment) are provided. In each storage recess 36, one exploration-side magnet piece 9 is stored. Here, each exploration-side magnet piece 9 is stored in each storage recess 36 with the colored surface 9 a aligned in order to be attracted to the standby-side magnet piece 8.

  The cover 35 has a notch 37 formed in a part (upper part in FIG. 5), and selectively opens one storage recess 36 among the plurality of storage recesses 36 formed in the main body 34. The remaining storage recess 36 is provided to be closed. A rotating shaft 42 of a small motor 41 (moving mechanism) is connected to a connecting member 39 projecting from the center of the magnet holder 32 via a driving belt 40. By driving the small motor 41, the main body 34 rotates in the circumferential direction via the drive belt 40 and the connecting member 39, and the storage recess 36 opened by the notch 37 is changed. Specifically, the housing recess 36 to be opened is switched by rotating the main body 34 by a predetermined angle (45 degrees in the present embodiment) by driving the small motor 41.

  As shown in FIG. 6, a robot car 13 for drilling includes a vehicle body 44 having wheels 43 and a drive motor (not shown) for driving the wheels 43, and a movable head provided at the tip of the vehicle body 44. Part 45. In the robot vehicle 13, the vehicle body 44 and the movable head portion 45 are connected via a connecting member 46, and the movable head portion 45 is rotatably provided with the connecting member 46 as a fulcrum.

  A cylindrical rotary cutter (cylindrical blade) 48 is provided at the center of the movable head portion 45 so as to be movable up and down. In addition, a rotary motor (not shown) for driving the rotary cutter 48 is provided inside the movable head portion 45. Further, a camera 49 for confirming the formation position of the perforation with the exploration-side magnet piece 9 as a mark is provided at the distal end portion of the movable head portion 45.

  The robot cars 13 and 22 described above are connected to a controller (operation panel) mounted on a moving vehicle (not shown) via a cable, and images taken by the cameras 21 and 49 are confirmed on a monitor monitor of the controller. It is configured to be moved to a predetermined position.

  Next, the rehabilitation method of the sewage pipe culvert 10 in the present embodiment will be described in detail.

  First, in the cleaning process, a manhole cover connected to the main pipe 1 of the sewage pipe basin 10 is opened, and a nozzle of a high-pressure washing machine is inserted into the main pipe 1 from the manhole. And the inside of the main pipe | tube 1 is wash | cleaned by discharging high pressure washing water from the nozzle.

  Next, in the investigation process, a self-propelled robot vehicle having a camera is carried into the main pipe 1 and the damaged portion in the main pipe and the position of the attachment pipe 2 are investigated. As the robot car, the robot car 22 in FIG. 5 or the robot car 13 in FIG. 6 may be used, or a robot car dedicated to investigation may be used.

  And when the attachment pipe 2 is connected in the main pipe 1, the magnet arrangement | positioning process for arrange | positioning the standby side magnet piece 8 in the connection part 5 of the main pipe 1 and the attachment pipe 2 is performed.

  In this magnet arrangement step, the packer 15 of the magnet arrangement jig 11 is inserted into the attachment pipe 2 from the sewage basin 3, and the packer 15 is pushed in with a work bar for rehabilitation to reach the connection part 5 with the main pipe. Insert (see FIG. 4). Thereafter, air is supplied from the air pump 17 to the packer 15 through the hose 16, the packer 15 is inflated by the action of the air pressure, and the packer 15 is fixed to the connection portion 5 with the main pipe 1. Further, here, the standby side magnet piece 8 is arranged at the center position of the attachment tube 2 by the expansion of the packer 15. In addition, when the attachment pipe | tube 2 is connected to several places of a repair area | region, the jig | tool 11 for magnet arrangement | positioning is fixed for each of those connection parts 5, and the waiting | standby side magnet piece 8 is arrange | positioned.

  Next, a repair process for repairing the main pipe 1 is performed. Specifically, the nonwoven fabric (rehabilitation material) 6 impregnated with uncured resin is folded into a predetermined position in the main pipe 1 (see FIG. 8). Alternatively, the non-woven fabric (rehabilitation material) 6 is inserted into the main pipe 1 while being pressurized and inverted by air pressure or water pressure P1, and is arranged at a predetermined position (see FIG. 9). Next, the rehabilitation material 6 is inflated by air pressure or water pressure P <b> 1 and brought into close contact with the inner peripheral surface of the main pipe 1. In this state, hot water, steam, ultraviolet rays, or the like is applied to the rehabilitation material 6 to cure the resin of the rehabilitation material 6 and regenerate the main pipe 1.

  In addition, as the rehabilitation method of the main pipe 1, other than the above-described method, for example, a pipe manufacturing method may be used. That is, a strip of vinyl chloride is piped into a circular shape to construct a rehabilitation pipe of a predetermined length, and a gap between the rehabilitation pipe and the existing main pipe 1 is filled with a cement-based backfill material. Rehabilitate main 1

  Regardless of the construction method described above, the inner peripheral surface of the main pipe 1 is in a state in which the rehabilitation material 6 is pasted over the entire circumference, and as a result, the connecting portion 5 between the main pipe 1 and the mounting pipe 2 is It is closed with the rehabilitation material 6 (see FIG. 10).

  In the magnet adsorption process, as shown in FIG. 11, the robot car 22 is carried into the main pipe 1 and moved to the vicinity of the connection portion 5 with the attachment pipe 2. Then, the movable head portion 26 and the attachment mounting portion 28 of the robot vehicle 22 are driven, and the storage recess 36 (the exploration-side magnet piece 9) opened by the cover 35 in the magnet holder 32 of the magnet holster 12 is included in the main pipe 1. While making it approach a peripheral surface, it moves along an internal peripheral surface. Here, when the exploration-side magnet piece 9 of the magnet holder 32 approaches the standby-side magnet piece 8 disposed in the connecting portion 5 and the distance from the standby-side magnet piece 8 is less than about 10 cm, The exploration-side magnet piece 9 in the housing recess 36 is attracted by the magnetic force of the waiting-side magnet piece 8 and is attracted to the waiting-side magnet piece 8 through the rehabilitation material 6. As a result, the exploration-side magnet piece 9 is arranged at a position corresponding to the connection portion 5 with the attachment pipe 2 on the inner peripheral surface of the main pipe 1.

  And when another connection part 5 which has not arrange | positioned the search side magnet piece 9 exists in a repair area | region, in the magnet holster 12, the small motor 41 is driven and the main body 34 is rotated, and the search side magnet piece 9 is accommodated. The other storage recess 36 is opened by the notch 37 of the cover 35. Thereafter, the robot car 22 is moved in the vicinity of another connecting portion 5 and the movable head portion 26 and the attachment mounting portion 28 are driven to attract the exploration side magnet piece 9 to a position corresponding to the connecting portion 5.

  In this way, after the exploration-side magnet piece 9 is arranged at a position corresponding to each connection portion 5, a drilling step for forming a hole at a position corresponding to each connection portion 5 is performed. Specifically, the robot car 22 is carried out from the main pipe 1 and, instead, the robot car 13 for drilling is carried into the main pipe 1 (see FIG. 12). Then, the robot car 13 is moved using the exploration side magnet piece 9 as a mark, the position of the exploration side magnet piece 9 is confirmed by the camera 49, and the exploration side magnet piece 9 is aligned with the center position of the rotary cutter 48. In this state, the rotary cutter 48 is driven to form a hole in the rehabilitation material 6. By this perforation, the connecting portion 5 between the main pipe 1 and the attachment pipe 2 communicates.

  Further, in the present embodiment, after the drilling is started by the rotary cutter 48, the air of the packer 15 of the magnet placement jig 11 disposed in the connection portion 5 is removed and the diameter of the packer 15 is reduced. Then, the magnet placement jig 11 is pulled out from the attachment tube 2 and taken out from the sewage tank 3. Similarly, a perforation is formed at a position corresponding to each connection portion 5 and the magnet placement jig 11 of each connection portion 5 is taken out. Further, when the magnet placement jig 11 is separated from the connection portion 5, the magnetic force of the standby side magnet piece 8 does not act, and the search side magnet piece 9 that has been attracted to the position corresponding to the connection portion 5 until then. Falls. This exploration-side magnet piece 9 is housed and collected inside a cylindrical rotary cutter 48 disposed below it. Then, the work for rehabilitating the sewer pipe 10 is completed by unloading the robot car 13 for drilling from the main pipe 1.

  Therefore, according to the present embodiment, the following effects can be obtained.

  (1) In this embodiment, since the exploration-side magnet piece 9 is used instead of metal powder as in the prior art, the magnetic force acting between the standby-side magnet piece 8 is sufficiently ensured and relatively Thus, the exploration-side magnet piece 9 can be easily adsorbed from a position far away. Further, since the exploration-side magnet piece 9 is accurately attracted to the center position of the attachment tube 2, in the drilling process, the exploration-side magnet piece 9 is used as a mark to form a hole in the rehabilitation material 6, whereby the attachment tube 2 The perforation for communicating with the main pipe 1 at the connecting portion 5 can be formed accurately and quickly. Furthermore, since the exploration-side magnet piece 9 is not as fine as metal powder, it can be easily collected after the formation of the perforations.

  (2) The magnet placement jig 11 of the present embodiment is provided with a standby magnet piece 8 at the center position of the main pipe side end of the packer 15. In the magnet placement step, the packer 15 of the magnet placement jig 11 is inserted from the mounting tube 2 side, and the packer 15 is expanded by the action of air pressure, thereby connecting the connecting portion 5 between the mounting tube 2 and the main tube 1. The packer 15 can be fixed to the surface. The packer 15 can stop the drainage flowing from the attachment pipe 2 side to the main pipe 1 side. Further, the stand-by magnet piece 8 can be accurately arranged at the center of the attachment tube 2 by the packer 15. Thus, if the magnet arrangement | positioning jig | tool 11 is comprised using the packer 15 for water stop, the manufacturing cost of the jig | tool 11 for magnet arrangement | positioning can be held down.

(3) In the present embodiment, the magnet holster 12 is attached to a self-propelled robot car 22 having a camera 21. In the magnet holder 32 of the magnet holster 12, the exploration-side magnet pieces 9 are stored one by one in the plurality of storage recesses 36, and one storage recess 36 of the plurality of storage recesses 36 is selected by the cover 35. Can be opened. In the magnet adsorption process, the robot vehicle 22 is carried in the main pipe 1 where an operator cannot enter, and the exploration-side magnet piece 9 in the opened storage recess 36 connects the main pipe 1 and the mounting pipe 2. The magnet holder 32 is moved so as to approach the standby side magnet piece 8 arranged in the section 5. As a result, due to the magnetic force of the standby side magnet piece 8, the exploration side magnet piece 9 is attracted from the inside of the storage recess 36 and is attracted to the standby side magnet piece 8 through the rehabilitation material 6. In addition, when there are a plurality of connection portions 5 of the mounting pipe 2, the exploration-side magnet pieces 9 serving as marks are sequentially attracted to positions corresponding to the connection portions 5 by changing the storage recesses 36 opened by the cover 35. Can be made. In this way, it is not necessary to carry out the self-propelled robot car 22 from the main pipe 1 each time one exploration-side magnet piece 9 is attracted, and the exploration-side magnets are located at positions corresponding to the plurality of connecting portions 5. The piece 9 can be quickly adsorbed.
[Second Embodiment]

  Next, a second embodiment embodying the present invention will be described. In the first embodiment, the stand-by magnet piece 8 is arranged at the connecting portion 5 between the main pipe 1 and the attachment pipe 2 using the magnet arrangement jig 11 having the packer 15. In the embodiment, a magnet placement jig 55 shown in FIG. 13A is used instead of the magnet placement jig 11. Further, in order to place the magnet placement jig 55 in the connecting portion 5 between the main pipe 1 and the mounting pipe 2, a mounting tool 56 shown in FIG. 13B is used.

  Specifically, when the distance between the sewage basin 3 and the main pipe 1 is increased and the attachment pipe 2 becomes longer, or when the house is demolished and the sewage basin 3 is removed (in the case of an unknown casket), the first implementation As in the above-described form, it is not possible to insert the magnet placement jig 11 from the attachment tube 2 side and place the standby-side magnet piece 8 in the connection portion 5. In that case, the stand-by magnet piece 8 is arranged on the connecting portion 5 from the main pipe 1 side using the magnet arrangement jig 55 of the present embodiment.

  More specifically, as shown in FIG. 13A, the magnet placement jig 55 includes a ring member 57 formed in a ring shape having an outer diameter that is the same as the inner diameter of the mounting tube 2, and the ring member 57. And latching portions 58 provided at a plurality of locations (three locations in the present embodiment). In this magnet arrangement jig 55, a part of the ring member 57 is cut out, and a standby side magnet piece 8 is provided at the center of the ring member 57 via a wire 59. The ring member 57 in the magnet placement jig 55 is formed using a flexible and restorable material such as a resin such as vinyl chloride, a leaf spring material, and stainless steel.

  As shown in FIG. 13B, the mounting tool 56 includes three claw members 61 that are hooked on the hook portions 58 of the magnet placement jig 55, and the claw member 61 is narrowed to magnetize the magnet. The diameter of the ring member 57 of the placement jig 55 is reduced. The mounting tool 56 is mounted and used instead of the magnet holster 12 on the attachment mounting portion 28 in the robot vehicle 22 used in the first embodiment.

  Then, in the magnet placement step, as shown in FIG. 14, with the robot car 22, the magnet placement jig 55 is mounted on the claw member 61 of the mounting tool 56, and the main pipe 1 and the mounting pipe 2 are connected. It conveys to the connection part 5. Then, in a state where the diameter of the ring member 57 of the magnet placement jig 55 is reduced by the claw member 61 of the mounting tool 56, the magnet is applied to the connection portion 5 of the attachment tube 2 while checking the position of the connection portion 5 with the camera 21. An arrangement jig 55 is arranged. Thereafter, the diameter of the ring member 57 is increased by expanding the claw member 61 of the mounting tool 56, and the magnet placement jig 55 is mounted on the connection portion 5. Thereby, the standby-side magnet piece 8 can be disposed at a position that becomes the center of the attachment pipe 2 in the connection portion 5 between the main pipe 1 and the attachment pipe 2.

Thereafter, in the same manner as in the first embodiment, the repairing process, the magnet adsorption process, and the drilling process are performed, so that the drilling is accurately and quickly formed in the connecting portion 5 between the main pipe 1 and the mounting pipe 2. Can do. In addition, after the drilling is formed, a detaching tool having a key hand is attached to the robot car 22 and the key hand of the detaching tool is hooked on the ring member 57 of the magnet locating jig 55 for magnet placement. The jig 55 is detached from the connection portion 5. Thereby, the work for rehabilitating the sewer pipe 10 is completed.
[Third Embodiment]

  Next, a third embodiment embodying the present invention will be described. In the first and second embodiments, the damaged portion is repaired by pressing the rehabilitation material 6 onto the inner peripheral surface of the main pipe 1. On the other hand, in the present embodiment, a rehabilitation pipe having a diameter smaller than that of the existing main pipe 1 is inserted into the main pipe 1 or a vinyl chloride strip is fitted inside the main pipe 1 by a pipe making method. The rehabilitation method is to repair the sewage pipe 10 by filling the gap between the main pipe 1 and the rehabilitation pipe with a backfilling material such as mortar after constructing the rehabilitation pipe in a circular shape. ing. In this rehabilitation method, the attachment pipe 2 and the rehabilitation pipe 71 are connected using the hat-type repair member 70 shown in FIGS. 15 and 16.

  Specifically, the repair member 70 includes a cylindrical main body 72, a flange 73 provided on the base end side (lower side in FIG. 15) of the main body 72, and a side surface of the main body 72. And a collar portion 74 formed over the circumference. In the repair member 70 of the present embodiment, the flange portions 74 are provided at two locations on the side surface of the main body portion 72. In the repair member 70, the distal end side of the main body portion 72 is inserted into the attachment tube 2, and the flange portion 73 is bonded and fixed to the inner peripheral surface of the rehabilitation tube 71.

  In the rehabilitation method of the present embodiment, as in the first embodiment described above, the standby side magnet is connected to the connecting portion 5 between the main pipe 1 and the mounting pipe 2 using the magnet placement jig 11 in the magnet placement step. The piece 8 is arranged. And the rehabilitation pipe | tube 71 is inserted inside the main pipe 1 in a repair process. Thereafter, in the magnet adsorption step, the robot car 22 is carried into the rehabilitation pipe 71 and the exploration-side magnet piece 9 is adsorbed at a position corresponding to the connection portion 5 using the magnet holster 12. Further, in the drilling step, the robot car 13 for drilling is carried into the rehabilitation pipe 71, and the drilling is formed at a position corresponding to the connection portion 5 with the attachment pipe 2 using the exploration side magnet piece 9 as a mark.

  Here, since a gap is formed at a position corresponding to the connection portion 5 of the attachment pipe 2, the gap is closed using the repair member 70 (see FIG. 16). Specifically, using a mounting tool (not shown) attached to the robot car 22, the tip of the main body 72 of the repair member 70 is inserted into the attachment pipe 2, and the collar 73 is connected to the inner peripheral surface of the rehabilitation pipe 71. Adhere to and fix. Thereafter, the backfill material 75 is filled in the gap between the existing main pipe 1 and the rehabilitation pipe 71 (see FIG. 17). In the repair member 70 of the present embodiment, the flange portion 74 is formed over the entire circumference of the side surface of the main body portion 72, so that the back-filling material 75 flows through the gap between the attachment pipe 2 and the main body portion 72. Is prevented by the collar 74. Further, when the backfill material 75 is filled, a force for pushing up the repair member 70 is applied by the frictional resistance between the flange portion 74 and the backfill material 75. As a result, the degree of adhesion between the collar portion 73 of the repair member 70 and the inner peripheral surface of the renovated pipe 71 increases, and the repair member 70 can reliably close the gap formed in the connection portion 5.

  In addition, you may change each embodiment of this invention as follows.

  In each of the above embodiments, the magnet placement jig 11 shown in FIG. 4 or the magnet placement jig shown in FIG. 13 is used in order to place the standby side magnet piece 8 in the connecting portion 5 between the main pipe 1 and the mounting pipe 2. Although the tool 55 was used, it is not limited to this. For example, a magnet placement jig 81 shown in FIG. 18 or a magnet placement jig 82 shown in FIG. 19 may be used. Specifically, the magnet arrangement jig 81 in FIG. 18 includes a plurality of elastic pieces 83 extending radially from the central portion so as to expand beyond the inner diameter of the mounting tube 2. A standby-side magnet piece 8 is provided on the distal end side in the insertion direction (X direction in FIG. 18). The magnet placement jig 81 is formed in a wing shape so that the interval between the plurality of elastic pieces 83 is increased toward the rear end side. As a material for forming the plurality of elastic pieces 83, for example, a plated thin steel plate (tin plate) or a resin plate such as polyethylene is used.

  In the magnet placement process, the magnet placement jig 81 is inserted into the attachment pipe 2 from the sewage basin 3 and pushed in with a work bar for rehabilitation, as in the first embodiment. It is arrange | positioned at the connection part 5. Thereby, the magnet arrangement jig 81 is fixed to the connecting portion 5 by the elastic force of each elastic piece 83, and the standby-side magnet piece 8 can be arranged at the center of the attachment tube 2.

  19 also includes a plurality of elastic pieces 84 extending radially from the central portion so as to expand beyond the inner diameter of the mounting tube 2, and is located at the center position of each elastic piece 84 in the insertion direction ( A standby magnet piece 8 is provided on the rear end side in the X direction in FIG. In the magnet arrangement jig 82, the interval between the plurality of elastic pieces 84 is formed such that the middle portion is the largest and the tip end side and the rear end side are narrower. The plurality of elastic pieces 84 are also formed using, for example, a thin steel plate or a resin plate such as polyethylene.

  In the magnet placement step, the magnet placement jig 82 is mounted from the main pipe 1 side using a mounting tool (not shown) mounted on the self-propelled robot car 22 as in the second embodiment. It is inserted into the attachment tube 2 and is arranged at the connecting portion 5 between the main tube 1 and the attachment tube 2. Thereby, the magnet arrangement jig 82 is fixed to the connecting portion 5 by the elastic force of each elastic piece 84, and the standby-side magnet piece 8 can be arranged at the center of the attachment tube 2.

As a modified example of the magnet arrangement jig 55 in the second embodiment, a magnet arrangement jig 85 as shown in FIG. 20 may be embodied. In this magnet arrangement jig 85, latching portions 87 are provided at two locations inside the ring member 86. Further, the standby side magnet piece 8 is fixed to the center of the ring member 86 using soft vinyl 88. Even when this magnet arrangement jig 85 is used, the standby-side magnet piece 8 can be arranged at the center of the attachment tube 2 at the connection portion 5 between the main tube 1 and the attachment tube 2. In addition, the number of the latching parts 58 and 87 in the jigs 55 and 85 for magnet arrangement | positioning can be changed suitably. However, if the latching portions 58 and 87 are formed more than necessary, the manufacturing cost of the magnet placement jigs 55 and 85 and the mounting tool 56 increases. Therefore, when the three latching portions 58 are formed as in the magnet arranging jig 55 or when the two latching portions 87 are formed as in the magnet arranging jig 85, the manufacturing cost can be suppressed. Since the diameter of the ring member 57 can be accurately reduced, it is preferable in practice.
Moreover, although each magnet arrangement | positioning jig | tool 55 and 85 was comprised using the circular ring members 57 and 86, it is not limited to this. If it is a member arrange | positioned at the connection part 5 using an elastic piece, it is possible to use polygonal members other than circular. However, it is preferable to make the shape in consideration of workability so as not to increase the manufacturing cost.

In the second embodiment, the mounting tool 56 (see FIG. 13B) for attaching the magnet placement jig 55 is formed by the mechanical vertical movement or circular movement of the ring member 57. As long as the diameter can be reduced / expanded, the configuration may be changed as appropriate.
In each of the above embodiments, the magnet piece 8 made of a permanent magnet is used as the standby side magnet. However, the present invention is not limited to this, and an electromagnet may be used, for example.

  In each of the above embodiments, the sewage pipe 10 is repaired as an existing pipe, but other than that, the buried pipe may be repaired. Moreover, as a material which comprises the existing pipe, other than the product made from concrete, the product made from earthenware or resin may be sufficient. Furthermore, the existing pipe rod may be a rectangle, a horseshoe shape, an egg shape or the like in addition to a circle.

  -In the said 1st and 2nd embodiment, as the material of the rehabilitation material 6, photocuring resin, thermosetting resin, thermoplastic vinyl chloride or vinyl chloride, polyethylene etc. are used other than underwater curing resin May be.

  Next, in addition to the technical ideas described in the claims, the technical ideas grasped by the respective embodiments described above are listed below.

  (1) The magnet placement jig according to claim 3, wherein the stand-by magnet is provided on the distal end side in the insertion direction, and is inserted from the attachment tube side and disposed at the connection portion.

  (2) The magnet placement jig according to claim 3, wherein the standby magnet is provided on the rear end side in the insertion direction, and is inserted from the main pipe side and disposed in the connection portion.

  (3) A self-propelled robot vehicle comprising the magnet holster according to claim 6.

  (4) A tool for detachment, which is detachably provided on a self-propelled robot car having a camera and detaches the magnet placement jig according to claim 3 or 4 from the connection portion.

  (5) A method for rehabilitating an existing pipe according to claim 1, wherein the main pipe is a small diameter pipe that an operator cannot enter.

Sectional drawing which shows the existing pipe rod of one Embodiment. Sectional drawing which shows the magnet piece arrange | positioned at the connection part of a main pipe and an attachment pipe. The side view which shows each magnet piece. Sectional drawing for demonstrating the jig | tool for magnet arrangement | positioning in 1st Embodiment. The side view which shows the robot vehicle equipped with the magnet holster. The side view which shows the robot vehicle for drilling. Sectional drawing which shows a magnet holster. Explanatory drawing which shows the rehabilitation construction method of the main. Explanatory drawing which shows the rehabilitation construction method of the main. Sectional drawing for demonstrating the state after a repair process. Sectional drawing for demonstrating a magnet adsorption | suction process. Sectional drawing for demonstrating a perforation process. (A) is a perspective view which shows the jig | tool for magnet arrangement | positioning of 2nd Embodiment, (b) is a perspective view which shows the tool for mounting | wearing for mounting the jig | tool for magnet arrangement | positioning. Sectional drawing for demonstrating the magnet arrangement | positioning process in 2nd Embodiment. The perspective view which shows the repair member in 3rd Embodiment. Sectional drawing which shows the mounting state of the repair member in a connection part. Sectional drawing which shows the mounting state of the repair member in a connection part. (A) is a side view which shows the magnet for jig | tool arrangement | positioning of another embodiment, (b) is explanatory drawing which shows the arrangement | positioning state of the jig | tool for magnet arrangement | positioning in a connection part. (A) is a side view which shows the magnet for jig | tool arrangement | positioning of another embodiment, (b) is explanatory drawing which shows the arrangement | positioning state of the jig | tool for magnet arrangement | positioning in a connection part. The top view which shows the jig | tool for magnet arrangement | positioning of another embodiment. Sectional drawing which shows the tube fistula after rehabilitation. Sectional drawing which shows the tube fistula after rehabilitation.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Main pipe 2 ... Mounting pipe 5 ... Connection part 6 ... Rehabilitation material 8 ... Standby side magnet piece 9 ... Exploration side magnet piece 10 ... Sewage pipe rod 11, 55, 81, 82, 85 ... Magnet as existing pipe rod Arrangement jig 12 ... Magnet holster 22 ... Robot car 15 ... Packer 21 ... Camera 32 ... Magnet holder as a magnet holding member 35 ... Cover 36 ... Storage recess 41 ... Small motor 56 constituting the moving mechanism 56 ... Mounting tool 57 , 86 ... Ring member 58, 87 ... Hook part 59 ... Wire 61 ... Claw member 70 ... Repair member 71 ... Rehabilitation pipe 72 ... Body part 73 ... Gutter part 74 ... Gutter part 75 ... Backfill material 83, 84 ... Elastic piece

Claims (6)

A rehabilitation method for an existing pipe for repairing an existing pipe having a main pipe buried in the ground and a mounting pipe connected to the main pipe in an unopened state,
In the connecting portion between the main pipe and the attachment pipe, a magnet arrangement step of arranging a standby side magnet at a position that becomes the center of the attachment pipe;
A repairing step of arranging rehabilitation material over the entire circumference of the inner peripheral surface to repair the main pipe;
A magnet adsorbing step of adsorbing the exploration-side magnet piece via the rehabilitation material, using the magnetic force of the standby-side magnet at a position corresponding to the connection portion of the attachment pipe blocked by the rehabilitation material;
As a mark the exploration side magnet pieces, seen including a drilling step for drilling to the rehabilitating material in a state combined with the exploration side magnet pieces in the center position,
In the magnet arrangement step, the ring is formed in a ring shape having an outer diameter that is the same as the inner diameter of the mounting pipe, and is provided at a plurality of locations inside the ring member. Using a magnet placement jig provided with a latching portion for latching a mounting tool to reduce the diameter of the member, wherein the standby magnet is provided in the center of the ring member via a wire An arrangement for rehabilitating the existing pipe , wherein the standby magnet is arranged . In the magnet placement step, a mounting tool that is detachably attached to a self-propelled robot car having a camera and has a plurality of claw members that are hooked on a hook portion of the ring member is used, and the claw member is The diameter of the ring member is reduced by narrowing, and the ring member is disposed at the connection portion confirmed by the camera, and then the diameter of the ring member is expanded by expanding the claw member to form the connection portion. The method for rehabilitating an existing pipe rod according to claim 1, wherein the magnet placement jig is attached. A rehabilitation method for an existing pipe for repairing an existing pipe having a main pipe buried in the ground and a mounting pipe connected to the main pipe in an unopened state,
  In the connecting portion between the main pipe and the attachment pipe, a magnet arrangement step of arranging a standby side magnet at a position that becomes the center of the attachment pipe;
  A repairing step of arranging rehabilitation material over the entire circumference of the inner peripheral surface to repair the main pipe;
  A magnet adsorbing step of adsorbing the exploration-side magnet piece via the rehabilitation material, using the magnetic force of the standby-side magnet at a position corresponding to the connection portion of the attachment pipe blocked by the rehabilitation material;
  A drilling step for drilling the rehabilitated material with the exploration side magnet piece as a mark and the exploration side magnet piece aligned with a center position;
Including
  In the magnet adsorbing step, a plurality of storage recesses that are detachably attached to a self-propelled robot car having a camera and store the search side magnet pieces one by one, and one of the plurality of storage recesses A magnet holding member having a cover that selectively opens one of the storage recesses and closes the remaining storage recesses, and an exploration-side magnet piece in the storage recess that is opened in the magnet holding member are disposed in the connection portion. The exploration-side magnet piece is attracted using a magnet holster provided with a moving mechanism that moves the magnet holding member so as to approach the standby-side magnet.
A method for rehabilitating existing pipes. When performing the magnet placement process in the rehabilitation method of the existing pipe for repairing the existing pipe having the main pipe buried in the ground and the attachment pipe connected to the main pipe in an unopened state, A magnet placement jig used for placing a standby side magnet at a position which becomes the center of the mounting pipe at a connection portion between the main pipe and the mounting pipe ;
A ring member formed in a ring shape having an outer diameter equal to the inner diameter of the mounting tube, and a part of which is cut away;
Provided at a plurality of locations on the inner side of the ring member, and a latching portion for latching a mounting tool to reduce the diameter of the ring member, and the stand-by through a wire at the center of the ring member A magnet placement jig comprising a side magnet. A mounting tool that is used to mount the magnet placement jig according to claim 4 to the connecting portion and is detachably mounted on a self-propelled robot car having a camera,
A plurality of claw members that are hooked on the hook portion of the ring member are provided,
The ring member is reduced in diameter by constricting the claw member, and after the ring member is arranged at the connecting portion confirmed by the camera, the ring member is expanded in diameter by expanding the claw member. A mounting tool, wherein the magnet placement jig is mounted on the connection portion. In the magnet adsorption step in the rehabilitation method of the existing pipe rod for repairing the existing pipe rod having a main pipe buried in the ground and a mounting pipe connected to the main pipe in an uncut state, Utilizing the magnetic force of the standby side magnet arranged at the center of the mounting pipe at the connection between the main pipe and the mounting pipe, it is used for adsorbing the exploration side magnet piece through the rehabilitation material , A magnet holster removably attached to a self-propelled robot car having a camera,
A magnet having a plurality of storage recesses for storing the exploration-side magnet pieces one by one, and a cover that selectively opens one storage recess among the plurality of storage recesses and closes the remaining storage recesses. A holding member;
And a moving mechanism for moving the magnet holding member so that the exploration-side magnet piece in the storage recess opened in the magnet holding member approaches the standby-side magnet disposed in the connecting portion. Magnet holster to play.

Images