JP3783107B2 - In-pipe repair machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure of an in-pipe repair machine capable of repairing a pipe such as a sewer buried in the ground from the inside.
[0002]
[Prior art]
Conventionally, ceramic pipes, concrete fume pipes, and PVC pipes made of synthetic resin are used for pipes such as the sewer main pipes buried in the ground, but these pipes are old or underground. Failures such as cracks, breakage, and separation of connections occur due to subsidence and fluctuations in ground pressure.
[0003]
When repairing such a failure location, for example, using a stretchable repair material laminated with a glass cloth and nonwoven fabric, an in-pipe repair machine wrapped around the repair material and temporarily fixed is introduced from the manhole to the repair location of the tube. Thus, a repair construction method called an FRP method has been developed in which an inner peripheral surface of a failure part is pressure-bonded using an adhesive.
[0004]
FIG. 9 shows an external view of a conventional in-pipe repair machine.
[0005]
This in-pipe repair machine 101 fixes both ends of a cylindrical rubber sleeve 102 having elasticity with respect to a holding mechanism (not shown) that is fixed to the front and rear ends of a connecting material (not shown) provided in the longitudinal direction inside. . A heater (not shown) is provided inside the rubber sleeve 102, and a traveling wheel 103 that can support the airframe is provided below the holding mechanism. The front and rear holding mechanisms are provided with traction metal fittings 105.
[0006]
When such an in-pipe repair machine 101 is used, a repair material (not shown) is wound around the outer periphery of the rubber sleeve 102, and the rubber sleeve 102 is inserted into the pipe in a contracted state. 103 and 103 are brought into contact with the inner bottom surface of the pipe, and the wire 107 connected to the pulling metal fitting 105 is pulled in a desired direction from the ground, whereby the in-pipe repairing machine 101 is moved to the pipe failure point.
[0007]
Then, air is supplied to the rubber sleeve 102 from the ground, the entire rubber sleeve 102 is expanded, the repair material is pressed against the inner peripheral surface of the pipe and transmitted to the heater, and the entire rubber sleeve 102 is heated by the heat generated by the heater. Thus, the thermosetting adhesive applied to the outer surface of the repair material is thermally cured, and the repair material is fixed to the inner peripheral surface of the pipe for repair.
[0008]
The rubber sleeve 102 has a substantially circular cross section, and has a branch sleeve 109 branched to repair the boundary with the branch. The manifold sleeve 109 expands and contracts both in the direction of the manifold and in the radial direction of the manifold.
[0009]
The rubber sleeve 102 and the branch sleeve 109 are manufactured separately from, for example, the same material and are overlapped and fixed at the boundary 111. The boundary 111 has a substantially oval shape that is long in the circumferential direction of the rubber sleeve 102.
[Problems to be solved by the invention]
In general, such an in-pipe repair machine has a dimension that is full of the inner diameter of the pipe to be repaired. Specifically, the holding mechanism and the outer diameter of the rubber sleeve 102 are close to the inner diameter of the pipe. However, because the boundary 111 is made of rubber, the radial dimension tends to be large. Therefore, the vicinity of the boundary 111 rubs against the inner wall of the pipe and the thermosetting adhesive drops. It was easy.
[0011]
The present invention has been made to solve the above-described problems, and repairs in pipes in which the vicinity of the boundary between the rubber sleeve and the branch sleeve rubs against the inner wall of the pipe and the thermosetting adhesive does not fall off. The purpose is to provide a machine.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, the invention of claim 1 is characterized in that an elastic rubber sleeve for temporarily fixing a repair material having a thermosetting adhesive applied to the outer surface thereof, and both ends of the rubber sleeve are sealed. A pair of holding mechanisms for holding in a state, a connecting member for connecting the pair of holding mechanisms inside the rubber sleeve, a rubber heater provided close to the inside of the rubber sleeve, and a rubber sleeve provided in one holding mechanism In an in-pipe repair machine having an air coupler that guides air for inflating the air and a socket that is provided in one holding mechanism and energizes the rubber heater, the rubber sleeve has a substantially circular cross section, In order to repair the boundary, the branch sleeve that branches in the direction of the branch is branched, and the boundary where the rubber sleeve and the manifold sleeve are overlapped and fixed is the rubber three It is pipe repair machine, characterized in that no long elliptical shape in the axial direction of the.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
An in-pipe repair machine according to an embodiment of the present invention will be described below with reference to FIGS.
[0014]
The rubber sleeve 3 provided on the outermost periphery of the machine body 1 of the in-pipe repair machine has a cylindrical shape, has elasticity, and can be expanded and contracted by injecting air or the like. The rubber sleeve 3 is used to wrap and temporarily fix a repair material (not shown), and a thermosetting adhesive is applied to the outer surface of the repair material. The outer cross section of the rubber sleeve 3 is circular.
[0015]
The in-pipe repair machine 1 is for repairing the boundary between the sewer main pipe 7 and the branch pipe 9 as shown in FIG. A branch sleeve 11 that extends and contracts is provided. The boundary 12 where the rubber sleeve 3 and the manifold sleeve 11 are overlapped and fixed has an elliptical shape that is long in the axial direction of the rubber sleeve 3. Thereby, in a state where the manifold sleeve 11 is contracted (FIG. 6), the boundary 12 is positioned inside the recess 3A formed in the rubber sleeve 3 by the contraction.
[0016]
Both ends of the rubber sleeve 3 are held in a sealed state by each pair of holding mechanisms 13. These holding mechanisms 13 are connected by a connecting material 15. The connecting material 15 is disposed inside the rubber sleeve 3. In the center of the connecting material 15 in the longitudinal direction, a rubber heater 17 (indicated by a two-dot chain line) is close to the inside of the rubber sleeve 3 (in the figure, it is outside the rubber sleeve 3 but is actually inside). The heater spring 19 and the rubber heater 17 are actually in a state where the rubber sleeve 3 is inflated from the illustrated state.
[0017]
Each holding mechanism 13 has a holding member 21 for holding the end of the rubber sleeve 3 in a sealed state. That is, the holding member 21 has a short cylindrical shape, and the end of the rubber sleeve 3 is put on the outer periphery and stopped by the krupp 23. Then, the holding member 21 is folded once, and a cap-like rubber presser 25 is put on the bolt. 27 to the holding member 21.
[0018]
Of these, the holding member 21 of the one holding mechanism 13 (the right side in FIG. 1, FIG. 3) is provided with a rotating shaft 29 therethrough. This penetration is performed in an airtight manner, and the rotary shaft 29 is rotatable and also serves as a pipe through which air for inflating the rubber sleeve 3 is passed. A flange portion 31 is formed on the leading end side through which the rotary shaft 29 penetrates, that is, the right end in the figure, and a donut-shaped disc 33 is fixed to the flange portion 31 with a bolt 34. On the other hand, an air coupler 35 is attached with a bolt 37. The air coupler 35 is provided with an air guide port 39 for guiding air, and is opposed to the outer port of the rotary shaft 29 that also serves as the pipe. The air coupler 35 is provided with a socket 41 for energizing the rubber heater 17 and a motor described later. A cover 36 is attached to the air coupler 35 with a bolt 36A. The outer shape of the cover 36 has a bullet shape that is tapered toward the outer side of the end of the fuselage 1, and traveling is facilitated.
[0019]
In addition, the traveling wheel 45 and the U shackle 47 are provided on the disc 33 via a member 43 attached by a bolt 42. The U shackle 47 locks a wire (not shown) for towing.
[0020]
In the one holding mechanism 13 (the right side in FIG. 1), the rotating shaft 29 and the disk 33 held in a penetrating state by the holding member 21 are fixed, and the traveling wheel 45 is attached to the disk 33. However, in the other holding mechanism 13 (left side in FIG. 1), the self-propelled device 49 that is rotatably connected around the rotation shaft 48 protruding from the boss portion 21 </ b> A formed in the holding member 21 is on the fixed side. The driving wheel 50 is attached to the self-propelled device 49.
[0021]
A bullet-shaped cover 36 is attached to the self-propelled device 49 by bolts 36A.
[0022]
The rotating shaft 27 is held by the holding member 21 through a bearing in a penetrating state, and a gear 51 is provided concentrically at an end on the inner side of the machine body 1 so that the rotating shaft 27 can be rotated by a motor 53 engaged with the gear 51. It has become.
[0023]
As shown in FIG. 2, a window glass 55 is provided at the tip of the branch sleeve 11, and the position of the repaired manifold 9 (see FIG. 1) is confirmed inside the window glass 55. A monitor camera unit 57 is provided. Further, a halogen lamp 58 for illuminating the outside through the window glass 55 is attached near the monitor camera unit 57 (FIG. 6).
[0024]
This manifold sleeve 11 is in contact with the inner peripheral surface of the manifold 9 so as to press the wound and temporarily fixed repair material (not shown), so that it expands in the radial direction of the manifold and also extends in the longitudinal direction of the manifold. It has a bellows shape so that it can expand and contract.
[0025]
The bellows-like manifold sleeve 11 always tries to extend in the longitudinal direction of the manifold 9, but is normally held in a contracted state by being pulled by the mainspring spring device 59. The mainspring spring device 59 is configured as follows. That is, a total of four wires 60 attached to the four corners inside the distal end of the branch pipe sleeve 11 are pulled in the contraction direction (downward in the figure), and each of the four pulleys 61 changes the direction in the horizontal direction, It is fixed to one slider 63. The slider 63 is configured to slide on a rail 65 provided in the longitudinal direction of the connecting member 15. The slider 63 is further attracted by the unwound mainspring spring 67 and held in the contracted state position. The force of the mainspring spring 67 is set to be a force that causes the slider 63 to slide in the right direction in the drawing by losing the force of the branch sleeve 11 to expand due to the air guided by the air coupler 35.
[0026]
Hereinafter, the repair procedure by the in-pipe repair machine 1 according to this embodiment will be described.
[0027]
That is, this in-pipe repairing machine is carried to the site by an operator or the like, and a wire (not shown) is locked to either one of the holding mechanisms 13 or both of the U shackles 47 and is lowered to the sewage pipe 7 to be repaired. . Then, while pulling the wire or traveling with the driving wheel 50 of the self-propelled device 49, the image sent from the monitor camera unit 57 is viewed on the ground monitor receiver and repaired for the purpose of repair. Search for 9 (FIG. 1). At this time, the in-pipe repair machine 1 is provided with an air hose for sending air to the air coupler 35, an energizing cable for energizing the socket 41, a signal cable for taking out an image signal from the monitor camera unit 57, and the like. Work is done in a state connected to.
[0028]
Since the outer shape of the cover 36 provided at both ends of the airframe 1 has a tapered bullet shape, it is easy to get over the dust and steps in the tube 7 and travel is facilitated.
[0029]
Further, the boundary 12 between the rubber sleeve 3 and the branch sleeve 11 has an elliptical shape that is long in the axial direction of the rubber sleeve 3, and the boundary 12 is in a state where the branch sleeve 11 is contracted (FIG. 6). Since it is located on the inner side, it is possible to prevent the right and left dimensions from increasing. Therefore, it is possible to prevent a problem that the vicinity of the boundary 12 rubs against the inner wall of the tube 7 and the thermosetting adhesive falls.
[0030]
Now, when the position of the manifold 9 is confirmed by the monitor camera unit 57, the motor 53 is rotated to rotate around the bearing. That is, in both holding mechanisms 13, the connecting material 15 and the rubber sleeve 3 are rotated around the bearing 45 with respect to the traveling wheel 45 around the longitudinal axis of the tube 7, the aim of the monitor camera is adjusted, and the position of the manifold 9 is adjusted. Check. This rotation is performed, for example, 165 degrees in the left-right direction (FIG. 8).
[0031]
When the position of the manifold 9 is confirmed, the travel of the in-pipe repair machine 1 and the rotation of the motor 53 are stopped at that position, air is pumped from the ground, and the air coupler 35 and the rotary shaft 29 that also serves as a pipe are used. Air is sent into the rubber sleeve 3. As a result, the rubber sleeve 3 starts to expand in the radial direction. At the same time, the manifold sleeve 11 not only expands in the radial direction but also extends in the longitudinal direction of the manifold 9. This is because the mainspring spring 67, which has lost the force to which the branch sleeve 11 is extended by the air, is sent out, the slider 63 slides, and the wire 60 cannot be maintained in the contracted state.
[0032]
When the expansion and extension are sufficiently performed, the repair material wound around the outer periphery of the rubber sleeve 3 and the manifold sleeve 11 and temporarily fixed is pressed against the inner peripheral surfaces of the main pipe 7 and the manifold 9 of the sewer. Is done.
[0033]
At this time, the silicon rubber heater 17 has been pushed inward in the radial direction of the rubber sleeve 3 due to the force of the rubber sleeve 3 to be contracted so far, but is positioned in a state close to the inner side of the rubber sleeve 3. When the rubber sleeve 3 expands due to the above, the force that the heater spring 19 tries to expand moves together with the rubber sleeve 3 in the radial direction. Thereby, the silicon rubber heater 17 maintains the state close to the inside of the rubber sleeve 3.
[0034]
The silicon rubber heater 17 is energized, the repair material is heated through the rubber sleeve 3, and the thermosetting adherend applied to the outer surface of the repair material is thermoset. As a result, the repair material adheres to the inner peripheral surface of the pipe.
[0035]
After the repair material is fixed to the inner peripheral surfaces of the pipes 7 and 9, air is extracted from the rubber sleeve 3. As a result, the mainspring spring 67, which has been defeated by the force of the rubber sleeve that is about to expand by air, returns to its original state, the slide 63 slides to the left in the figure, and the branch sleeve 11 contracts. Further, the silicon rubber heater 17 returns to the radially inward direction. In this way, the in-pipe repair machine 1 is separated from the inner peripheral surfaces of the pipes 7 and 9 again, can run, and is pulled back to the ground by the wire and the self-running device 49.
[0036]
In the above embodiment, the traveling wheel 45 and the self-propelling device 49 are provided. However, in other embodiments, the traveling wheel 45 and the self-propelling device 49 are not provided, and the body 1 can be moved by a wire. .
[0037]
【The invention's effect】
As described above, according to the in-pipe repair machine of the present invention, the boundary where the rubber sleeve and the manifold sleeve are overlapped and fixed has an elliptical shape that is long in the axial direction of the rubber sleeve. It is possible to prevent the direction dimension from becoming large, and to prevent the thermosetting adhesive from falling off due to the vicinity of the boundary being rubbed against the inner wall of the tube.
[Brief description of the drawings]
FIG. 1 is an overall longitudinal sectional view of an in-pipe repair machine according to an embodiment of the present invention.
FIG. 2 is an enlarged cross-sectional view showing the left half of FIG.
FIG. 3 is an enlarged cross-sectional view showing the right half of FIG. 1;
4 is a front view as seen from the left direction with the cover of FIG. 1 removed. FIG.
5 is a front view seen from the right direction with the cover of FIG. 1 removed. FIG.
6 is a sectional view taken along line VI-VI in FIG.
7 is an external perspective view of the center portion of FIG. 1. FIG.
8 is a sectional view taken along line VIII-VIII in FIG.
FIG. 9 is an overall perspective view showing a conventional in-pipe repair machine.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Machine body of pipe repair machine 3 Rubber sleeve 11 Branch sleeve 12 Boundary 13 Holding mechanism 15 Connecting material 17 Rubber heater 19 Heater spring 21 Holding member 29 Rotating shaft 31 Flange part 33 Disc 35 Air coupler 36 Cover 41 Socket 45 Running wheel 49 Self Running device 53 Motor 57 Monitor camera unit 63 Slider 65 Rail 67 Mainspring spring

Claims (1)

A stretchable rubber sleeve for temporarily fixing a repair material coated with a thermosetting adhesive on the outer surface, a pair of holding mechanisms for holding both ends of the rubber sleeve in a sealed state, and a pair of the holding mechanisms A connecting material to be connected inside the rubber sleeve, a rubber heater provided close to the inside of the rubber sleeve, an air coupler provided in one holding mechanism for guiding air for expanding the rubber sleeve, and one holding mechanism In-pipe repairing machine having a socket for energizing the rubber heater provided in,
The rubber sleeve has a substantially circular cross section, has a branch sleeve that branches in the direction of the branch to repair the boundary with the branch, and the rubber sleeve and the sleeve are overlapped. An in-pipe repair machine characterized in that the boundary to be fixed has a substantially elliptical shape that is long in the axial direction of the rubber sleeve.

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