Strip-shaped material supply device

Abstract

To enable smooth unwinding of the strip-shaped material supplied to the pipe-making machine from the drum. [Solution] In the process of manufacturing the rehabilitated pipe 3, the strip member supply device 6 that supplies the strip member 4 to the pipe manufacturing machine 5 is located on the ground near the manhole 1A. The strip member supply device 6 includes a drum 10 that holds the polymer 4X of the strip member 4, which is formed by winding the strip member 4 together; a rotation support means 20 that rotatably supports the drum 10 and enables the strip member 4 to be fed out to the manhole 1A via the opposite side of the manhole 1A and then over the polymer 4X; and a guide means 30 located on the opposite side of the manhole 1A that guides the strip member 4 as it is fed out from the polymer 4X. The guide means 30 includes a support frame 31 and a regulating roller 32 that is rotatably supported on the support frame 31 and has a rotation axis parallel to the rotation axis of the drum 10, and the regulating roller 32 guides the strip member 4 at a position away from the polymer 4X.

Description

Technical Field

[0001] The present invention relates to an apparatus for supplying a strip member to a manhole in a process of manufacturing a rehabilitation pipe for rehabilitating an existing pipe.

Background Art

[0002] In order to rehabilitate an existing pipe such as an aging sewer pipe, it is known to line the inner circumference of the existing pipe with a rehabilitation pipe. Taking the method disclosed in Patent Document 1 as an example, a rehabilitation pipe is manufactured by winding a strip member (profile) spirally by a pipe manufacturing machine disposed in a manhole and joining adjacent side edges thereof with a one-week shift. The strip member is supplied from a strip member supply device installed on the ground near the manhole to the pipe manufacturing machine. The strip member supply device has a drum that holds a polymer in which strip members are stacked, and a rotary support means that rotatably supports this drum. As the drum rotates, the strip member is fed out from the polymer, through the manhole, and to the pipe manufacturing machine.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When feeding out the strip member from the polymer held by the drum as described above, friction occurs between the fed-out strip member and the outermost circumference of the polymer, and due to this frictional resistance, the feeding out of the strip member may not be performed smoothly.

Means for Solving the Problems

[0005] To solve the above problems, the present invention relates to a process for manufacturing a rehabilitated pipe, which is made up of a spiral pipe, by joining adjacent side edges of a strip-shaped member offset by one full turn, in which a strip-shaped member supply device supplies the strip-shaped member to a manhole, The device comprises a drum for holding the polymer of the strip-shaped member, which is formed by winding the strip-shaped member multiple times; a rotating support means for rotatably supporting the drum and enabling the strip-shaped member to be unwound from the polymer; and a guide means for guiding the strip-shaped member as it is unwound from the polymer. The guiding means includes a support frame and a regulating roller rotatably supported on the support frame having a rotation axis parallel to the rotation axis of the drum, wherein the regulating roller guides the strip-shaped member away from the polymer.

[0006] According to the above configuration, the strip-shaped member is guided away from the polymer by the regulating roller. Therefore, frictional resistance between the strip-shaped member and the polymer can be prevented from hindering the feeding of the strip-shaped member, and the strip-shaped member can be fed out smoothly.

[0007] Preferably, the guide means further includes an auxiliary roller, the auxiliary roller is rotatably supported on the support frame parallel to the regulating roller, and the strip-shaped member passes between the regulating roller and the auxiliary roller. This configuration allows the strip-shaped member to be dispensed stably without flapping around.

[0008] Preferably, flanges are formed at both ends of the regulating roller and the auxiliary roller to restrict the movement of the strip-shaped member in the width direction. This configuration restricts the strip-shaped member from swinging in the width direction, i.e., in the direction of the drum's rotation axis. As a result, it is possible to prevent the strip-shaped member from rubbing against the flanges at both ends of the drum, and to maintain a constant working position on the manhole side for assisting in the deployment of the strip-shaped member.

[0009] Preferably, the guide means is positioned in the center of the drum in the direction of its rotational axis. This configuration guides the strip-shaped member, which is fed out from the polymer spreading in the direction of the drum's rotation axis, to the center of the drum, thereby more reliably preventing the strip-shaped member from rubbing against the flanges at both ends of the drum. Since the working position is in the center of the drum's rotation axis, workability is also improved. Furthermore, even if the strip-shaped member is fed out from the polymer over a wide area in the direction of the drum's rotation axis, the introduction angle of the strip-shaped member from the feeding position to the guide means can be suppressed, allowing for smooth guidance by the guide means.

[0010] Preferably, the strip-shaped member is unfurled into the manhole via the opposite side of the manhole and then over the polymer, and the guide means is positioned on the opposite side of the manhole at a position higher than the rotation axis of the drum. With this configuration, when the strip-shaped member is dispensed into the manhole by passing over the opposite side of the manhole and over the polymer, contact between the strip-shaped member and the polymer can be avoided or suppressed. [Effects of the Invention]

[0011] According to the present invention, a strip-shaped member can be smoothly unwound from the polymer held in the drum. [Brief explanation of the drawing]

[0012] [Figure 1] This is a schematic longitudinal cross-sectional view showing the process of rehabilitating an existing pipe using a strip member supply device and a pipe-making machine according to one embodiment of the present invention. [Figure 2] This is a side cross-sectional view showing an enlarged view of the strip-shaped member supply device. [Figure 3] Figure 2 shows the strip-shaped member supply device as viewed from direction A. [Figure 4] This is a top view of the guide means of the strip-shaped member supply device. [Modes for carrying out the invention]

[0013] An embodiment of the present invention will be described below with reference to the drawings. Figure 1 shows an aging existing pipe 1 to be rehabilitated. The existing pipe 1 to be rehabilitated is, for example, a sewer pipe buried underground, but it may also be a water supply pipe, an agricultural water pipe, a gas pipe, a hydroelectric power generation water conduit, a tunnel, etc. One end of the existing pipe 1 is connected to the starting manhole 2A, and the other end is connected to the receiving manhole 2B.

[0014] The existing pipe 1 is rehabilitated by lining its inner circumference with a rehabilitated pipe 3, which is a spiral pipe. The rehabilitated pipe 3 is manufactured by spirally winding a strip-shaped member 4 (profile) and joining the side edges of strip-shaped members 4 that are one turn apart. In this embodiment, the strip-shaped member 4 is made of a synthetic resin such as polyvinyl chloride (PVC) or polyolefin, and reinforcing materials such as metal or FRP may be incorporated as needed.

[0015] The strip-shaped member 4 has a cross-sectional shape as shown in Figure 4, for example, and includes a base portion 4a with one smooth surface, female fitting portions 4b and 4c located on one side edge in the width direction of the base portion 4a, and male fitting portions 4d and 4e located on the other side edge of the base portion 4a. By fitting the male fitting portions 4d and 4e, which are spaced one full turn apart, into these female fitting portions 4b and 4c using the pipe-making machine 5 described later, a rehabilitated pipe 3 consisting of a spiral pipe is manufactured. The base portion 4a has a reinforcing portion 4f with a rectangular cross-section formed on the side opposite the smooth surface.

[0016] In this embodiment, the rehabilitated pipe 3 is manufactured using an expander pipe manufacturing method. Referring to Figure 1, a push-type pipe manufacturing machine 5 is installed at the bottom of the starting manhole 2. Near the starting manhole 2A, a strip member supply device 6 is arranged on the ground to supply the strip member 4 to the pipe manufacturing machine 5, along with a wire winch 7, a pump 8 for supplying a slow-curing sealant, and a hydraulic unit 9 for supplying hydraulic pressure to the pipe manufacturing machine 5.

[0017] In the pipe manufacturing machine 5, a regenerated pipe 3 with a diameter smaller than that of the existing pipe 1 is manufactured using the strip member 4. In this pipe manufacturing process, the wire 7a drawn from the wire winch 7 is incorporated into the fitting portion of the strip member 4, and the sealing agent supplied from the pump 8 is filled into one female fitting portion 4b of the strip member 4. Note that the other female fitting portion 4c of the strip member 4 is pre-filled with a hot melt adhesive, and the regenerated pipe 3 is maintained with a small diameter by this hot melt adhesive.

[0018] When the tip of the small-diameter regenerated pipe 3 reaches the pipe end of the existing pipe 1 facing the arrival-side manhole 1B, the wire winch 7 is driven to pull the wire 7a, thereby cutting the male fitting portion 4e fitted to the female fitting portion 4c. As a result, the restraining force of the fitting portion at the side edge of the strip member 4 is weakened, so that the regenerated pipe 3 is expanded in diameter and lined so as to adhere to the inner circumference of the existing pipe 1.

[0019] <Configuration of the strip member supply device> Hereinafter, the strip member supply device 6 which is a characteristic part of the present invention will be described with reference to FIGS. 2 to 4. The strip member supply device 6 includes a drum 10 that holds the polymer 4X of the strip member 4 formed by stacking the strip members 4, a rotation support means 20 that rotatably supports the drum 10, and a guide means 30 that guides the strip member 4 fed out from the outer peripheral side of the polymer 4X held by the drum 10.

[0020] As shown in FIGS. 2 and 3, the drum 10 has a cylindrical body portion 11 that holds the polymer 4X and disk-shaped flanges 12 provided at both ends of the body portion 11. The polymer 4X is constructed by winding the strip members 4 in a plurality of columns in the axial direction of the rotation axis of the drum 1 and in a plurality of layers in the radial direction.

[0021] The rotational support means 20 includes a support base 21 installed on the ground or the like, and four rollers 22 rotatably mounted on the support base 21. The flange 12 of the drum 10 rests on these rollers 22, thereby rotatably supporting the drum 10. In this embodiment, at least one of the four rollers 22 is driven by a drive motor (not shown).

[0022] The guide means 30 is positioned on the opposite side of the manhole 1A from the drum 10, at a height above the rotation axis of the drum 10, and away from the polymer 4X held by the drum 10 (see Figure 2). Furthermore, the guide means 30 is positioned in the center of the drum 10 in the direction of its rotation axis (see Figure 3). The guide means 30 is supported on the upper part of the support column 40 via a support 41. The support column 40 may be placed on the ground by a base (not shown) provided at its lower end, or its lower end may be connected to the support base 21 of the rotating support means 20 via a connecting frame.

[0023] The guide means 30 includes a support frame 31 fixed to the support 41, and a pair of regulating rollers 32 and auxiliary rollers 33 that are rotatably supported on the support frame 31. These rollers 32 and 33 are preferably made of resin. The support frame 31 is rectangular in shape and open at the top and bottom. The support frame 31 is constructed by rotatably connecting one end of a pair of U-shaped frame halves 31a and 31b with a hinge 35, and detachably connecting the other end with a clamp (not shown). Frame half 31b is fixed to the support 41.

[0024] A regulating roller 32 is rotatably supported on one half of the frame 31a via a shaft member 36 and a bearing 37. An auxiliary roller 33 is rotatably supported on the other half of the frame 31b via a shaft member 38 and a bearing 39. The regulating roller 32 and the auxiliary roller 33 have rotation axes parallel to the rotation axis of the drum 10 and are formed to be elongated in the direction of that rotation axis. These rollers 32 and 33 each have flanges 32a and 33a at both ends. The spacing between the pair of flanges 32a and the pair of flanges 33a is greater than the width of the strip-shaped member 4, preferably up to twice the width. In the direction of the rotation axis of the drum 10, the feeding position of the strip-shaped member 4 from the drum 10 can be determined, the insertion position of the strip-shaped member 4 into the small-diameter manhole 1A can be regulated, and a stable supply can be achieved. The gap between rollers 32 and 33 is larger than the thickness of the strip-shaped member, preferably up to twice its thickness. This suppresses the strip-shaped member 4 from wobbling in the radial direction of the polymer 4X and drum 10, allowing for stable supply.

[0025] <Unwinding of strip-shaped material in the pipe manufacturing process> In the pipe-making process, the strip-shaped member 4 is pulled out from the underside of the polymer 4X held in the drum 10, passes on the opposite side of the manhole 1A from the perspective of the polymer 4X, then passes on the upper side of the polymer 4X, changes direction downwards, enters the manhole 2A, and is supplied to the pipe-making machine 5. In this embodiment, the unwinding of the strip-shaped member 4 is performed by the rotation of the roller 22 of the rotational support means 20, and by a worker on the manhole 1A side pulling the strip-shaped member 4. The roller 22, which is rotationally driven by a motor, assists in the unwinding of the strip-shaped member 4.

[0026] As shown in Figures 2 and 4, the strip-shaped member 4 is inserted between the regulating roller 32 and the auxiliary roller 33 of the guide means 30 on the opposite side of the manhole 1A, and can be stably supplied according to the trajectory defined by the rollers 32 and 33. Furthermore, when setting the strip-shaped member 4 on the guide means 30 prior to the pipe manufacturing process, the frame half 1a can be opened and closed relative to the hinge half 1b by the hinge 35, so it can be set easily.

[0027] More specifically, the strip-shaped member 4 is prevented from approaching the polymer 4X by the regulating roller 32 on the opposite side of the manhole 1A, and further, contact with the polymer 4X is prohibited or suppressed on the upper side as well. As a result, it can be smoothly fed out without resistance due to friction with the polymer 4X. In particular, when hot melt adhesive is filled into the female fitting portion 4c as in this embodiment, there is a possibility that the hot melt adhesive will adhere to one side of the strip-shaped member 4, increasing the frictional resistance between the strip-shaped members 4. However, even if hot melt adhesive adheres to the strip-shaped member 4 in this way, it will not be affected by friction.

[0028] Since the strip-shaped member 4 is also restricted by the auxiliary roller 33 to move away from the polymer 4X, it can be fed out stably along the trajectory shown in Figure 2 without flapping. The strip-shaped member 4 is unwound from the polymer 4X over a wide area in the rotational axis direction of the drum 10, but its trajectory is contained within the area between the flanges 32a of the regulating roller 32 and between the flanges 33a of the auxiliary roller 33 by the guide means 30, thereby suppressing displacement in the rotational axis direction of the drum 10. This also prevents the strip-shaped member 4 from rubbing against the inner surface of the flange 12 of the drum 10. Furthermore, the working position for pulling the strip-shaped member 4 on the manhole 1A side becomes constant, improving work efficiency. Since the guide means 30 is positioned in the center of the drum 10 in the direction of its rotation axis, it is possible to more reliably prevent the strip-shaped member 4 from rubbing against the inner surface of the flange 12 of the drum 10. In addition, since the working position is in the center of the drum 10, work efficiency is further improved. Furthermore, even if the strip-shaped member 4 is fed out from the polymer 4X over a wide area in the direction of the drum 10's rotation axis, the introduction angle of the strip-shaped member 4 from the feeding position to the guide means 30 can be suppressed, allowing for smooth guidance by the guide means 30.

[0029] The present invention is not limited to the embodiments described above, and various modifications can be made without departing from its spirit. The pipe-making machine may be self-propelled. In this case, during the pipe-making process, the machine is positioned inside the existing pipe and moves towards the starting manhole as the rehabilitated pipe extends. Rehabilitated pipes may be manufactured manually within existing pipes without the use of a pipe-making machine. A manhole can also be a vertical shaft that is inaccessible to workers or other people.

[0030] The connection is not limited to a configuration in which the side edges of adjacent strip-shaped members are directly joined together by fitting or the like, but may also be a configuration in which the side edges of adjacent strip-shaped members are indirectly joined together via a connecting member. The position of the guide means 30 (in the height Y direction in Figure 2 and in the X direction perpendicular to it) may be adjustable. It may also be slidable in the left-right direction in Figure 3. [Industrial applicability]

[0031] This invention can be applied, for example, to a technology for rehabilitating existing pipes such as aging sewer pipes. [Explanation of Symbols]

[0032] 1 Existing pipe 2A Manhole 3 Rehabilitation pipe 4. Strip-shaped member Polymerization of 4X strip-shaped members 5 Pipe making machine 6. Strip-shaped member supply device 10 Drums 20 Rotating support means 30 Guiding means 31 Support frame 32 Regulated Roller 33 Auxiliary rollers 32a, 33a Tsuba (sword guard)

Claims

1. In the process of manufacturing a rehabilitated pipe, which is made up of a spiral pipe, by connecting adjacent side edges of a strip-shaped member offset by one full turn, in a strip-shaped member supply device that supplies the strip-shaped member to a manhole, A drum for holding the polymer of the strip-shaped member, which is formed by winding the strip-shaped member in layers, Rotating support means for rotatably supporting the drum and enabling the strip-shaped member to be unwound from the polymer, A guide means for guiding the strip-shaped member unwound from the polymer, Equipped with, A strip member supply device characterized in that the guiding means includes a support frame and a regulating roller rotatably supported on the support frame having a rotation axis parallel to the rotation axis of the drum, wherein the regulating roller guides the strip member at a position away from the polymer.

2. The strip member supply device according to claim 1, characterized in that the guide means further includes an auxiliary roller, the auxiliary roller is rotatably supported on the support frame parallel to the regulating roller, and the strip member passes between the regulating roller and the auxiliary roller.

3. The strip member supply device according to claim 2, characterized in that flanges are formed at both ends of the regulating roller and the auxiliary roller to restrict the movement of the strip member in the width direction.

4. The strip-shaped member supply device according to claim 3, characterized in that the guide means is positioned at the center of the rotation axis direction of the drum.

5. The strip-shaped member is extended through the opposite side of the manhole, and then over the polymer, and into the manhole. The strip member supply device according to claim 1, characterized in that the guide means is positioned on the opposite side of the manhole at a position higher than the rotation axis of the drum.

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