Mounting pipe repair device, mounting pipe repair method, and mounting pipe structure

Abstract

We propose a pipe repair device and method that allow for easy insertion of a rehabilitation pipe for repairing a pipe into the curved section of a pipe. [Solution] The tip of the rehabilitation pipe 103 is connected to a self-propelled mobile vehicle 2 that can move longitudinally inside the mounting pipe 102 by a connecting member 3. By moving the self-propelled mobile vehicle 2 from the upstream end 102a to the downstream end 102b of the mounting pipe 102, the rehabilitation pipe 103 is pulled via the connecting member 3 and inserted into the inside of the mounting pipe 102. This makes it easier for the rehabilitation pipe 103 to pass through the curved sections 111, 112, and 113 of the mounting pipe 102, so that the rehabilitation pipe 103 can be easily inserted and installed along the entire length of the mounting pipe 102.

Description

Technical Field

[0001] The present invention relates to an attachment pipe repair device for disposing a rehabilitation pipe for repairing the attachment pipe inside an attachment pipe provided so as to branch from a main sewer pipe, an attachment pipe repair method using the attachment pipe repair device, and an attachment pipe structure in which a rehabilitation pipe is disposed inside the attachment pipe by the attachment pipe repair device.

Background Art

[0002] As a method for repairing an existing pipe such as a sewer pipe buried underground, for example, in Patent Document 1, a thermoplastic resin rehabilitation pipe that is shape-restored into a circular pipe by heating is inserted into the existing pipe in a folded state smaller than the inner diameter of the existing pipe, and then heated from the inside of the rehabilitation pipe to restore it to a circular pipe shape, thereby disposing the rehabilitation pipe inside the existing pipe for repair. Here, in the step of inserting the rehabilitation pipe into the existing pipe, the tip of the rehabilitation pipe is suspended from the starting side manhole, and a wire previously inserted from the manhole on the advancing direction side into the existing pipe is locked to the tip of the rehabilitation pipe. Then, the wire is pulled by a winch installed on the ground of the manhole on the advancing direction side, and the rehabilitation pipe is inserted over the entire length of the existing pipe.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the conventional repair method described above, guides are installed at the bottom of the starting manhole and the manhole in the direction of travel, and the rehabilitation pipe is curved by the guides as it moves forward. This is presumably to prevent damage to the rehabilitation pipe at the joint between the bottom of the manhole and the existing pipe. On the other hand, there is no mention of installing guides inside the existing pipe. From this, it appears that the conventional method is intended for repairing existing pipes that are nearly straight.

[0005] Generally, wastewater from a building flows into the sewer system via branch pipes (hereinafter referred to as "connecting pipes") that are connected to the sewer system. These connecting pipes may have a complex curved structure, taking into account the surrounding land and building environment. As a measure against the deterioration of such connecting pipes, repairs using rehabilitation pipes, as described above, can be carried out. When applying the conventional repair method, since the connecting pipe has a smaller diameter than the sewer system, it is not possible to attach the guide to the curved section of the connecting pipe, and the rehabilitation pipe must be inserted into the connecting pipe by pulling a wire without a guide. However, when pulling the rehabilitation pipe, there is a risk that it may get caught in the curved section of the connecting pipe and be unable to be inserted. This problem is particularly likely to occur in the case of connecting pipes with multiple curves.

[0006] Furthermore, the aforementioned conventional repair methods do not disclose any method for pre-inserting the wire used to pull the rehabilitation pipe into the existing pipe. In the case of the connecting pipe having a curved section, there is a risk that the wire may get caught in the curved section and be unable to be inserted, which presents a problem in that it is difficult to insert the wire into the connecting pipe.

[0007] The present invention proposes a pipe repair device that allows a rehabilitation pipe to be easily inserted and installed in a pipe having a curved portion, a pipe repair method using the pipe repair device, and a pipe structure in which a rehabilitation pipe is installed inside the pipe by the pipe repair device. [Means for solving the problem]

[0008] The present invention relates to a pipe repair device for a branch pipe, which is connected to an underground water supply main pipe and has at least one curved section, and for which a rehabilitation pipe is arranged in the longitudinal direction of the branch pipe, in contact with the inner circumferential surface of the branch pipe, the device comprising: a leading moving means for moving the rehabilitation pipe inside the branch pipe from the entry end into which the rehabilitation pipe enters toward the connection end connected to the water supply main pipe; and a pipe pulling means for linking the tip of the rehabilitation pipe with the leading moving means and pulling the rehabilitation pipe toward the connection end side behind the leading moving means inside the branch pipe. The mounting pipe repair device is characterized by comprising the leading moving means and the pipe pulling means, which move the rehabilitation pipe inside the mounting pipe from the entry end toward the connection end. Here, the longitudinal direction of the mounting pipe is the direction along the center line of the mounting pipe (the direction perpendicular to the radial direction).

[0009] In this configuration, the rehabilitation pipe is moved from the entry end to the connection end in accordance with the leading moving means that moves inside the branch pipe, making it easier for the rehabilitation pipe to pass through the curved section of the branch pipe. As a result, the rehabilitation pipe can be installed along the entire length of the branch pipe, making it easy and stable to repair the branch pipe with the rehabilitation pipe, and reducing the time and cost required for repair work.

[0010] Furthermore, the present invention is a branch pipe structure characterized by comprising a branch pipe having at least one curved section connected to an underground main pipe for water supply, and a rehabilitation pipe disposed longitudinally inside the branch pipe by the branch pipe repair device of the present invention described above, and in contact with the inner circumferential surface of the branch pipe.

[0011] In this configuration, the rehabilitated pipe is stably inserted and installed longitudinally inside the branch pipe by the aforementioned branch pipe repair device, so that the rehabilitated pipe is arranged substantially uniformly along the longitudinal direction of the branch pipe. For this reason, with this branch pipe structure, water can be supplied smoothly and stably to the main water supply pipe, and blockages inside the rehabilitated pipe can be suppressed for a relatively long period of time. Furthermore, since this branch pipe structure has a double structure consisting of a branch pipe and a rehabilitated pipe, its durability is also improved.

[0012] In the aforementioned pipe repair device of the present invention, the leading moving means is composed of a self-propelled moving device capable of moving longitudinally inside the pipe, and the pipe pulling means is composed of the self-propelled moving device and a connecting member that connects the self-propelled moving device and the tip of the rehabilitated pipe at approximately constant intervals.

[0013] Furthermore, a method for repairing a connecting pipe is proposed, which involves using this connecting pipe repair device to install the rehabilitated pipe into the connecting pipe, characterized in that the self-propelled mobile device is moved from the entry end to the connection end of the connecting pipe, thereby pulling the rehabilitated pipe via the connecting member and installing the rehabilitated pipe inside the connecting pipe.

[0014] The pipe repair device with this configuration allows for the pipe repair method of this invention. With this pipe repair method, the self-propelled mobile device pulls the rehabilitated pipe through the inside of the pipe, making it easy to insert the rehabilitated pipe even through curved sections of the pipe. This makes it possible to insert the rehabilitated pipe into the pipe more easily and stably.

[0015] In the aforementioned pipe repair device of the present invention, the leading moving means is provided with an intermittent moving device that can switch between a moving state in which it moves longitudinally inside the pipe and a stopped state in which it is stopped inside the pipe, and the pipe pulling means is provided with a bendable elongated wire with one end connected to the tip of the rehabilitation pipe, a wire folding member provided at the rear end of the intermittent moving device that slidably folds back the elongated wire connected to the tip of the rehabilitation pipe, and a wire pulling device to which the other end of the elongated wire folded back via the wire folding member is connected and disposed outside the entrance end side of the pipe, and which has a pulling function that pulls the elongated wire toward the entrance end side and a pull-out function that maintains the elongated wire in a state in which it can be pulled out into the pipe.

[0016] Furthermore, a method for repairing a rehabilitated pipe using this pipe repair device is proposed, comprising: a leading movement step of moving the intermittent movement device toward the connecting end of the pipe with the freely extendable function of the wire tensioning device enabled; a leading stop step of stopping the intermittent movement device when the intermittent movement device moved in the leading movement step passes through the curved portion of the pipe; and a rehabilitated pipe movement step of pulling the long wire by the tensioning function of the wire tensioning device until the rehabilitated pipe passes through the curved portion, with the intermittent movement device stopped in the leading stop step.

[0017] The branch pipe repair device with this configuration allows for the branch pipe repair method of this method to be performed. In this branch pipe repair method, by stopping the intermittent moving device at a position after passing the curved section and performing the rehabilitation pipe moving process, the leading end of the rehabilitation pipe can easily pass through the curved section, making it possible to insert the rehabilitation pipe into the branch pipe more easily and stably. Furthermore, in the case of a branch pipe having multiple curved sections, by performing a lead-out moving process, a lead-out stopping process, and a rehabilitation pipe moving process for each curved section in the direction from the entry end to the connection end, the rehabilitation pipe can easily pass through each curved section and be inserted into the branch pipe. [Effects of the Invention]

[0018] According to the mounting pipe repair device of the present invention, since the regenerated pipe can be easily and stably arranged over the entire length of the mounting pipe, it is possible to reduce the time and cost required for the repair work of the mounting pipe. Further, the mounting pipe repair method using the mounting pipe repair device of the present invention also exhibits the same operational effects. Further, in the mounting pipe structure in which the regenerated pipe is arranged by the mounting pipe repair device of the present invention, water can be smoothly and stably supplied inside the regenerated pipe.

Brief Description of the Drawings

[0019] [Figure 1] It is an explanatory view showing the mounting pipe repair device 1 of Example 1. [Figure 2] (A) It is a cross-sectional view showing a state in which the regenerated pipe 103 is inserted into the mounting pipe 102, and (B) it is a cross-sectional view showing the mounting pipe structure 107 composed of the restored regenerated pipe 103 and the mounting pipe 102. [Figure 3] It is an explanatory view showing the self-propelled vehicle 2 constituting the mounting pipe repair device 1. [Figure 4] It is an explanatory view showing a mode in which the regenerated pipe 103 is inserted through the mounting pipe 102 by the mounting pipe repair device 1 of Example 1. [Figure 5] It is an explanatory view showing the mounting pipe repair device 51 of Example 2. [Figure 6] It is an explanatory view showing the self-propelled vehicle 52 constituting the mounting pipe repair device 51. [Figure 7] It is an explanatory view showing a mode in which the regenerated pipe 103 is inserted through the mounting pipe 102 by the mounting pipe repair device 51 of Example 2. [Figure 8] It is an explanatory view showing a mode in which the regenerated pipe 103 is inserted through the mounting pipe 102, continuing from FIG. 7.

Modes for Carrying Out the Invention

[0020] Examples 1 and 2 that embody the mounting pipe repair device 1, the mounting pipe repair method, and the mounting pipe structure 107 according to the present invention will be described in detail below.

Examples

[0021] The branch pipe repair device 1 of Embodiment 1, as shown in Figure 1, is a device used for the work of inserting a rehabilitation pipe 103 into a branch pipe 102 that drains water from a building or the like to an underground sewer main pipe 101. In Embodiment 1, the branch pipe 102 that connects a drainage manhole 105 installed in a building or the like to an underground sewer main pipe 101 is used as an example of the target for repair with the rehabilitation pipe 103. The upstream end 102a of this branch pipe 102 is connected to the drainage manhole 105, and the downstream end 102b is connected to the sewer main pipe 101. The branch pipe 102 has a smaller diameter than the sewer main pipe 101 and has a configuration that includes multiple curved sections 111, 112, and 113.

[0022] The rehabilitated pipe 103 has the property of recovering its shape by applying a predetermined amount of heat, and is formed of, for example, a thermoplastic resin. Here, as the thermoplastic resin, polyvinyl chloride resin, high-density polyethylene resin, etc. can be applied, and among them, polyvinyl chloride resin, which has excellent drainage properties and durability, is preferably used. As shown in Figure 2(A), the rehabilitated pipe 103 of this embodiment 1 is folded into a form smaller than the inner diameter of the connecting pipe 102, and by applying a predetermined amount of heat, it is restored to a circular pipe shape that abuts the inner circumferential surface of the connecting pipe 102, as shown in Figure 2(B). The double structure of the restored rehabilitated pipe 103 and the connecting pipe 102 corresponds to the connecting pipe structure 107 according to the present invention. Since a conventionally known rehabilitated pipe 103 can be applied, its details are omitted.

[0023] In this embodiment 1, the rehabilitated pipe 103 is wound around the drum 31 in the folded state described above, as shown in Figure 1. In this folded state, it is pulled out from the drum 31 and inserted into the inside of the connecting pipe 102. Repair work on the connecting pipe 102 using this rehabilitated pipe 103 includes a rehabilitated pipe insertion step in which the rehabilitated pipe 103 is inserted along the longitudinal direction of the connecting pipe 102, and a rehabilitated pipe restoration step in which the rehabilitated pipe 103 is restored by applying a predetermined amount of heat to it and brought into contact with the inner circumferential surface of the connecting pipe 102. The connecting pipe repair device 1 in this embodiment 1 is used in the rehabilitated pipe insertion step, and the rehabilitated pipe 103 is inserted from the upstream end 102a to the downstream end 102b of the connecting pipe 102. For this reason, the rehabilitated pipe 103 in the following description is shown in the folded state (see Figure 2(A)).

[0024] As shown in Figure 1, the pipe repair device 1 includes a self-propelled mobile vehicle 2 that can travel longitudinally inside the pipe 102, and a connecting member 3 that connects the self-propelled mobile vehicle 2 to the tip of the rehabilitated pipe 103. The self-propelled mobile vehicle 2 can be remotely controlled to move and stop, and as shown in Figure 3, it includes a vehicle body 11 equipped with a remotely controlled drive means (not shown), and a plurality of wheel sections 12 driven by the drive means. In this embodiment, four wheel sections 12 are arranged radially at equal intervals in the circumferential direction of the vehicle body 11, and two sets of these four wheel sections 12 are provided at the front and rear.

[0025] The vehicle body 11 includes a control means (not shown) for remotely controlling the drive means, a camera (not shown) for displaying the inside of the mounting pipe 102, and a light (not shown), with the camera and light positioned at the front of the vehicle body 11. By activating the camera, a worker on the ground can view the inside of the mounting pipe 102 on a monitor while the vehicle is moving along the mounting pipe 102. On the other hand, the wheel section 12 includes a damper section (not shown) protruding outward from the vehicle body 11 and a tire section (not shown) that is rotated by the drive means, and the damper section can extend and retract. Inside the mounting pipe 102, the tire section of each wheel section 12 is biased outward and in contact with the inner circumferential surface of the mounting pipe 102. As a result, each wheel section 12, which is arranged at equal intervals in the circumferential direction of the mounting pipe 102, presses against the inner circumferential surface of the mounting pipe 102, holding the vehicle body 11 in the center of the mounting pipe 102. Since the wheel portion 12 has the damper portion, the vehicle body portion 11 can be held in the center of the mounting pipe 102 while the self-propelled vehicle 2 is moving along the mounting pipe 102.

[0026] A towing hook portion 15 is fixed to the rear end of the vehicle body 11 of the self-propelled mobile vehicle 2. The connecting member 3 comprises this towing hook portion 15 and a towed connecting portion 16 that is attached to the tip of the rehabilitation pipe 103. The towed connecting portion 16 comprises a mounting portion 17 that is detachably attached to the tip of the rehabilitation pipe 103 and a connecting hook portion 18 that is connected to the towing hook portion 15, with the connecting hook portion 18 fixed to the mounting portion 17. By attaching this mounting portion 17 to the tip of the rehabilitation pipe 103 and connecting the connecting hook portion 18 to the towing hook portion 15 of the self-propelled mobile vehicle 2, the rehabilitation pipe 103 is connected to the self-propelled mobile vehicle 2 at approximately constant distances to the rear. In this embodiment, the towing hook portion 15 and the connecting hook portion 18 each form a ring shape. This allows the tip of the rehabilitation pipe 103 and the self-propelled mobile vehicle 2 to change direction freely relative to each other.

[0027] In this embodiment, the connecting member 3 is configured such that the distance between the rear end of the vehicle body 11 connected by the connecting member 3 and the tip of the rehabilitation pipe 103 is shorter than the length of the curved sections 111, 112, and 113 of the mounting pipe 102 (at least the length of the shortest curved section). This makes it easier for the tip of the rehabilitation pipe 103 to pass through the curved sections 111, 112, and 113 when towed by the self-propelled vehicle 2, as will be described later. Furthermore, it is preferable that the connecting member 3 is configured such that the distance is shorter than half the length of the curved sections 111, 112, and 113.

[0028] Next, a method for inserting the rehabilitated pipe 103 into the connecting pipe 102 using the connecting pipe repair device 1 of this embodiment 1 (connecting pipe repair method) will be described. The drum 31 is positioned near the drain basin 105, and the tip of the rehabilitation pipe 103 is pulled out from the drum 31. The tip of the rehabilitation pipe 103 and the self-propelled mobile vehicle 2 are then connected by the connecting member 3, and the self-propelled mobile vehicle 2 is inserted into the mounting pipe 102 connected to the drain basin 105 from its upstream end 102a.

[0029] By remotely controlling the self-propelled mobile vehicle 2, it is made to travel inside the connecting pipe 102 from the upstream end 102a to the downstream end 102b. As a result, as shown in Figure 4 (and Figure 1), the tip of the rehabilitation pipe 103 is pulled by the self-propelled mobile vehicle 2, and the rehabilitation pipe 103 enters the inside of the connecting pipe 102 and moves in accordance with the self-propelled mobile vehicle 2. Here, as described above, the self-propelled mobile vehicle 2 has multiple extendable and retractable wheel sections 12 arranged radially, so it can travel stably and smoothly inside the mounting pipe 102 (straight and curved sections 111, 112, 113), and the vehicle body 11 can be kept in the center of the mounting pipe 102 while traveling. As a result, the tip of the rehabilitation pipe 103, which is connected to the vehicle body 11 via the connecting member 3, moves near the center of the mounting pipe 102, and can pass through the curved sections 111, 112, 113 of the mounting pipe 102 smoothly.

[0030] When the self-propelled mobile vehicle 2 travels through the inside of the mounting pipe 102 and reaches the downstream end 102b, the self-propelled mobile vehicle 2 is stopped and the towed connecting portion 16 of the connecting member 3 is removed from the tip of the rehabilitation pipe 103. In this way, the rehabilitation pipe 103 can be inserted from the upstream end 102a to the downstream end 102b of the mounting pipe 102. After this, the rehabilitation pipe restoration process described above is performed to restore the rehabilitation pipe 103 to a cylindrical shape and bring it into contact with the inner circumferential surface of the mounting pipe 102. This forms a double-layered mounting pipe structure 107 (Figure 2(B)) consisting of the mounting pipe 102 and the rehabilitation pipe 103 arranged longitudinally inside the mounting pipe 102.

[0031] As described above, the branch pipe repair device 1 (and branch pipe repair method) of this embodiment 1 allows the rehabilitated pipe 103 to be easily inserted along the entire length of the branch pipe 102, making it possible to easily and stably perform repair work on the branch pipe 102 using the rehabilitated pipe 103, thereby reducing the time and cost required for the repair work. Furthermore, the branch pipe structure 107 formed by the rehabilitated pipe restoration process is arranged in a substantially uniform manner so as to conform to the branch pipe 102 after the rehabilitated pipe 103 has been restored to a cylindrical shape, allowing for smooth and stable drainage within the rehabilitated pipe 103.

[0032] In Example 1, the main sewer pipe 101 corresponds to the main water supply pipe according to the present invention. The self-propelled mobile vehicle 2 corresponds to the self-propelled mobile device (leading mobile means) according to the present invention. The upstream end 102a of the connecting pipe 102 corresponds to the entry end according to the present invention, and the downstream end 102b corresponds to the connection end according to the present invention. [Examples]

[0033] The branch pipe repair device 51 in Example 2 is a device used for inserting a rehabilitated pipe 103 into a branch pipe 102 that connects the drain manhole 105 and the main sewer pipe 101, similar to Example 1 described above. That is, after the rehabilitated pipe insertion process is performed using this branch pipe repair device 51, the rehabilitated pipe restoration process is carried out. In Example 2, the main sewer pipe 101, branch pipe 102, rehabilitated pipe 103, and drain manhole 105 are the same as those in Example 1 described above. The rehabilitated pipe 103 is wound around the drum 31 in a folded state (see Figure 2(A)), similar to Example 1.

[0034] As shown in Figure 5, the pipe repair device 51 includes a self-propelled mobile vehicle 52 that travels inside the pipe 102, a towing wire 53 connected to the tip of the rehabilitated pipe 103, and a winch 54 that winds up the towing wire 53. A towing hook portion 15 through which the towing wire 53 is inserted is fixed to the rear end of the self-propelled mobile vehicle 52, and the towing wire 53 pulled out from the winch 54 is inserted into the towing hook portion 15 and connected to the tip of the rehabilitated pipe 103. Here, a detachable mounting portion 55 is attached to the tip of the rehabilitated pipe 103, and the tip of the towing wire 53 is connected to the mounting portion 55. The towing hook portion 15 has the same configuration as in the previously described embodiment 1 and is ring-shaped through which the towing wire 53 can be inserted.

[0035] As shown in Figure 6, the self-propelled mobile vehicle 52 of Embodiment 2 comprises a vehicle body 11 and a plurality of wheel sections 12, similar to Embodiment 1, and further includes a plurality of fastener sections 59 for holding it in a stopping position. The fastener sections 59 can be converted between a contact position (Figure 6(B)) in which they are pressed against the inner circumferential surface of the mounting pipe 102 and a separation position (Figure 6(A)) in which they are separated from the inner circumferential surface, and this conversion operation is remotely controlled by a control means (not shown) provided on the vehicle body 11. In Embodiment 2, four fastener sections 59 are arranged radially at equal intervals in the circumferential direction of the vehicle body 11, and as shown in Figure 6(B), the self-propelled mobile vehicle 52 can be held in the stopping position by setting all the fastener sections 59 to the contact position when the self-propelled mobile vehicle 52 is stopped. When the self-propelled mobile vehicle 52 is to be driven, all the fastener sections 59 are set to the separation position, as shown in Figure 6(A). Furthermore, the self-propelled mobile vehicle 52 of Embodiment 2 has the same configuration as Embodiment 1 described above, except for the fastening part 59, and the vehicle body 11 is equipped with a camera and a light, and the towing hook part 15 is fixed to the rear end.

[0036] The winch 54 includes a winding drum (not shown) for winding up the towing wire 53, and a winding drive means (not shown) for rotating the winding drum in the winding direction. Furthermore, it has a switching means (not shown) for switching between a locked state in which the winding drum is driven by the winding drive means and a rotatable free state. In the locked state, the winch 54 can wind up the towing wire 53 by driving the winding drive means to rotate the winding drum, while the towing wire 53 can be pulled out by switching to the free state using the switching means.

[0037] Next, a method for inserting the rehabilitated pipe 103 into the connecting pipe 102 using the connecting pipe repair device 1 of this embodiment 2 (connecting pipe repair method) will be described. The drum 31 and winch 54 are positioned near the drain basin 105, and the rehabilitation pipe 103 is pulled out from the drum 31 and the attachment part 55 is attached to its tip. The towing wire 53 is pulled out from the winch 54 and the towing hook part 15 of the self-propelled mobile vehicle 52 is inserted through it. The tip of the towing wire 53 is then connected to the attachment part 55.

[0038] With the winch 54 kept in the free state, the self-propelled mobile vehicle 52 is moved into the mounting pipe 102 from the upstream end 102a, as shown in Figure 5. By remotely controlling the self-propelled mobile vehicle 52 with the stopper portion 59 in a separated position, it is made to travel inside the mounting pipe 102 toward the downstream end 102b. As the self-propelled mobile vehicle 52 travels, the towing wire 53 is pulled out from the free winch 54 (see Figure 7). This process of moving the self-propelled mobile vehicle 52 with the winch 54 in the free state and pulling out the towing wire 53 is the leading movement process.

[0039] As shown in Figure 7(A), when the self-propelled mobile vehicle 52 travels inside the mounting pipe 102 and passes the first curved section 111 (closest to the upstream end 102a), it is remotely controlled to stop at a position beyond the curved section 111 (hereinafter referred to as the "nearby position"). The stopper portion 59 of the self-propelled mobile vehicle 52 is then remotely controlled to change from the separated position to the pressed position, and the self-propelled mobile vehicle 52 is stopped and held at the aforementioned nearby position. As mentioned above, the self-propelled mobile vehicle 52 is equipped with a camera and lights on the vehicle body 11, and a worker on the ground can control the movement and stopping of the self-propelled mobile vehicle 52 by viewing the camera's image on a monitor in real time. Therefore, the worker can remotely control the self-propelled mobile vehicle 52 to stop precisely at the nearby position after passing the curved section 111. The leading stop step involves stopping the self-propelled vehicle 52 at the aforementioned nearby position, converting the fastening part 59 to the press-fit position, and holding it in that position.

[0040] When the self-propelled vehicle 52 is stopped and held at the aforementioned nearby position, the winch 54 is switched to a locked state by the switching means and the winch 54 is driven to wind up. As a result, the towing wire 53 is wound onto the winch 54, and the tip of the rehabilitation pipe 103 is pulled by the towing wire 53 towards the downstream end 102b inside the mounting pipe 102. After this, as shown in Figure 7(B), when the tip of the rehabilitation pipe 103 is pulled to a position immediately behind the self-propelled vehicle 52 and passes through the curved section 111, the winding drive of the winch 54 is stopped. Here, since the towing wire 53 that pulls the rehabilitation pipe 103 is pulled via the towing hook portion 15 of the self-propelled vehicle 52 which is stopped and held at the aforementioned nearby position, the tip of the rehabilitation pipe 103 can pass through the curved section 111 smoothly. The rehabilitation pipe moving process involves stopping and holding the self-propelled mobile vehicle 52 at the aforementioned nearby position, and then driving the winch 54 to rewind until the tip of the rehabilitation pipe 103 passes through the curved section 111.

[0041] Next, the winch 54 is switched to a free state by the switching means, and the stopper portion 59 of the self-propelled mobile vehicle 52 is moved to a separated position. Then, as shown in Figure 8(A), the lead movement process is performed, in which the self-propelled mobile vehicle 52 is driven by remote control. When the self-propelled mobile vehicle 52 passes the next (second from the upstream end 102a) curved section 112, the lead stopping process is performed. This stops the self-propelled mobile vehicle 52 at a position near the curved section 112, changes the stopper portion 59 from the separated position to the pressed position, and holds it stopped at that position. After this, the rehabilitation pipe movement process is performed, which switches the winch 54 to a locked state and drives the winding, and as shown in Figure 8(B), the towing wire 53 pulls the tip of the rehabilitation pipe 103 to a position directly behind the self-propelled mobile vehicle 52. Then, when the tip of the rehabilitation pipe 103 passes the curved section 112, the winding drive of the winch 54 is stopped. By pulling the tip of the rehabilitation pipe 103 from the position after it has passed the previous curved section 111, it is possible to prevent the rehabilitation pipe 103 from getting caught in the curved section 111 and to allow it to move smoothly. Then, just as with the curved section 111, the tip of the rehabilitation pipe 103 can pass through the second curved section 112 smoothly.

[0042] Furthermore, by sequentially performing the aforementioned lead-out movement process, lead-out stopping process, and rehabilitation pipe movement process, the tip of the rehabilitation pipe 103 can be smoothly advanced to a position near the next curved section 113. After this, the lead-out movement process is performed to move the self-propelled vehicle 52 to the downstream end 102b, and once it reaches the downstream end 102b, the lead-out stopping process and the rehabilitation pipe movement process are performed sequentially to advance the tip of the rehabilitation pipe 103 to the downstream end 102b, thereby inserting the rehabilitation pipe 103 from the upstream end 102a to the downstream end 102b of the connecting pipe 102. After this, the rehabilitation pipe restoration process described above is performed to restore the rehabilitation pipe 103 to a cylindrical shape and bring it into contact with the inner circumferential surface of the connecting pipe 102. This creates a double-layered mounting pipe structure 107 consisting of a mounting pipe 102 and a rehabilitation pipe 103 arranged longitudinally inside the mounting pipe 102.

[0043] Thus, the branch pipe repair device 51 of this embodiment 2 can easily insert the rehabilitated pipe 103 along the entire length of the branch pipe 102 by sequentially executing a lead movement process, a lead stopping process, and a rehabilitated pipe movement process for each curved section 111, 112, and 113 of the branch pipe 102. Therefore, according to the branch pipe repair device 51 (and branch pipe repair method) of embodiment 2, repair work on the branch pipe 102 using the rehabilitated pipe 103 can be performed easily and stably, similar to embodiment 1 described above, and the time and cost required for the repair work can be reduced. Furthermore, in the branch pipe structure 107 of this embodiment 2, similar to embodiment 1 described above, the rehabilitated pipe 103, which has been restored to a cylindrical shape, is arranged substantially uniformly to conform to the branch pipe 102, so that the inside of the rehabilitated pipe 103 can be drained smoothly and stably.

[0044] In the aforementioned Embodiment 2, the self-propelled mobile vehicle 52 corresponds to the intermittent moving device (leading moving means) according to the present invention. The state in which the self-propelled mobile vehicle 52 is moving corresponds to the moving state according to the present invention, and the state in which the self-propelled mobile vehicle 52 is stopped and the stopper part 59 is held corresponds to the stopped state according to the present invention. The towing wire 53 corresponds to the long wire material according to the present invention, and the towing hook part 15 corresponds to the wire material folding member according to the present invention. The winch 54 corresponds to the wire material pulling device according to the present invention. In the winch 54, the function of locking it using the switching means and the function of rotating the winding drum using the winding drive means correspond to the pulling operation function according to the present invention. In addition, the function of converting the winch 54 to a free state using the switching means corresponds to the freely retractable function according to the present invention.

[0045] The present invention is not limited to the above-described embodiments 1 and 2, and can be modified as appropriate without departing from the spirit of the invention. For example, the dimensions and shapes of each part in the above-described embodiments can be changed as appropriate.

[0046] In Examples 1 and 2, a rehabilitated pipe that recovers its shape with heat was used, but the invention is not limited to this; a cylindrical rehabilitated pipe that is flexible and can slide inside the mounting pipe can also be used. Even with this rehabilitated pipe, by sliding it inside the mounting pipe, it can be inserted along the longitudinal direction of the mounting pipe, similar to Examples 1 and 2. Such a mounting pipe structure consisting of a rehabilitated pipe and a mounting pipe can also achieve the same effects as in Examples 1 and 2 described above.

[0047] In Examples 1 and 2, self-propelled mobile vehicles that run on tires were used, but the invention is not limited to these, and vehicles with other means of propulsion can also be used. For example, self-propelled mobile vehicles that run on caterpillar tracks or spherical balls may be used.

[0048] In Examples 1 and 2, the pipe repair device was configured to have only the function of inserting the rehabilitated pipe into the pipe, but it is not limited to this configuration and may also have a function to restore the rehabilitated pipe in addition to the insertion function. This pipe repair device has means for heating the rehabilitated pipe, and after performing the step of inserting the rehabilitated pipe into the pipe, it performs the step of restoring the rehabilitated pipe using this heating means. [Explanation of symbols]

[0049] 1.51 Repair device for mounting pipes 2. Self-propelled mobile vehicle (self-propelled mobile device) 3 Connecting members 15. Towing hook section (wire folding member) 52 Self-propelled mobile vehicle (intermittent mobility device) 53. Towing wire (long wire) 54. Winch (wire tensioning device) 101 Sewer main pipe (main pipe for water supply) 102 Mounting pipe 102a Upstream end (entering end) 102b Downstream end (connecting end) 103 Rehabilitation pipe 107 Mounting pipe structure 111,112,113 Curved section

Claims

1. A pipe repair device for connecting pipes, comprising: a rehabilitation pipe being positioned in the longitudinal direction of a connecting pipe, which is connected to an underground water supply main pipe and has at least one curved section, and which is positioned in contact with the inner circumferential surface of the connecting pipe; A leading moving means for moving the aforementioned connecting pipe from the entry end into which the rehabilitation pipe is inserted toward the connection end connected to the main water supply pipe, The tip of the rehabilitation pipe is linked to the leading moving means, and a pipe pulling means is provided inside the attachment pipe to pull and move the rehabilitation pipe toward the connecting end behind the leading moving means. Equipped with, A pipe repair device characterized in that the leading moving means and the pipe pulling means move the rehabilitated pipe inside the pipe from the entry end toward the connection end.

2. The aforementioned leading moving means is composed of a self-propelled moving device capable of moving longitudinally within the interior of the mounting pipe, The aforementioned pipe tensioning means is The aforementioned self-propelled mobile device, A connecting member that connects the self-propelled mobile device and the tip of the rehabilitation pipe at approximately constant intervals. The mounting pipe repair device according to claim 1, characterized in that it is composed of the following.

3. The aforementioned leading moving means is The device includes an intermittent movement mechanism that can switch between a moving state in which the device moves longitudinally inside the mounting pipe and a stopped state in which the device is stopped inside the mounting pipe. The aforementioned pipe tensioning means is A long, flexible wire with one end connected to the tip of the rehabilitation pipe, A wire folding member is provided at the rear end of the intermittent moving device and is slidably folded back the long wire connected to the tip of the rehabilitation pipe, The other end of the elongated wire, which has been folded back via the wire folding member, is connected to a wire tensioning device disposed on the outside of the entry end side of the mounting pipe, which has a tensioning function to pull the elongated wire toward the entry end side and a pull-out function to maintain the elongated wire in a state that can be freely pulled out into the mounting pipe. The mounting pipe repair device according to claim 1, characterized by being equipped with the following.

4. A method for repairing a connecting pipe, comprising installing the rehabilitated pipe into the connecting pipe using the connecting pipe repair device described in claim 2, A method for repairing a connecting pipe, characterized in that the self-propelled mobile device is moved from the entry end to the connection end of the connecting pipe, thereby pulling the rehabilitated pipe via the connecting member and arranging the rehabilitated pipe inside the connecting pipe.

5. A method for repairing a connecting pipe, comprising installing the rehabilitated pipe into the connecting pipe using the connecting pipe repair device described in claim 3, With the wire tensioning device's pull-out function enabled, the leading movement step involves moving the intermittent movement device toward the connection end of the mounting pipe, When the intermittent moving device, which has been moved by the preceding leading movement step, passes through the curved portion of the mounting pipe, a leading stopping step is performed to stop the intermittent moving device. With the intermittent moving device stopped in the preceding leading stop step, the rehabilitating pipe moving step involves pulling the elongated wire through the curved section using the tensioning function of the wire tensioning device. A method for repairing a mounting pipe, characterized by having the following features.

6. A connecting pipe having at least one curved section, connected to the main underground water supply pipe, A repair device for a mounting pipe according to claim 1 is provided, wherein a rehabilitation pipe is disposed longitudinally inside the mounting pipe and is in contact with the inner circumferential surface of the mounting pipe. A mounting pipe structure characterized by having the following features.

Images