JP6867124B2 - Water stop material restraint and underground pipe joint box water stop method - Google Patents

Description

The present invention relates to a water blocking material retainer and a water stopping method for an underground pipe joint box, for example, a joint connecting a pipe buried underground and a pipe connected to an oil fuel tank buried underground is stored. The present invention relates to metal fittings and a water stopping method for stopping the leakage of groundwater into the pipe joint box buried in the underground.

Underground tanks are buried in refueling stations such as gas stations. Fuel oil such as gasoline, light oil, and kerosene is unloaded (injected) from a tank truck, and the fuel oil is stored in the underground tank. Then, each measuring machine connected to the underground tank refuels (pours) the fuel oil stored in the underground tank to the vehicle.

For such equipment, the piping from the injection port that receives the unloading (injection) of fuel oil from the tank lorry vehicle to the underground tank is buried underground. Similarly, the piping between the underground tank and each weighing machine is also buried underground. These pipes are connected to pipes extending from the underground tank by pipe joints in a joint box buried underground for inspecting the underground tank. These pipes buried in the ground are arranged so as to penetrate the wall surface of the joint box and protrude into the joint box. Therefore, groundwater leaks into the joint box through the gaps in the through holes on the wall surface of the joint box that remain after passing through these pipes. Therefore, putty material was applied to the gap between the pipe and the wall surface to prevent such intrusion of groundwater. However, there is a problem that the putty material is peeled off due to the aged deterioration of the putty material and the water pressure of the groundwater, and the groundwater leaks into the joint box. Further, the conventional putty material needs to be constructed in a dry state, and there is a problem that it takes time to repair a part that has leaked once.

Although it is not buried underground, the end of the water-expandable rubber product extruded at the joint between the through hole provided in the concrete structure above ground and the sleeve pipe inserted into the through hole. A technique for stopping water by fitting a water stop ring in which the parts are connected in a ring shape with an adhesive is disclosed (see, for example, Patent Document 1). However, since such a water stop ring has already been formed in a ring shape at the time of use, if a pipe joint or the like is fixed at the end of the pipe and is thicker than the pipe diameter, the water stop ring is connected to the water stop ring. It is difficult to use because it cannot be passed through. Further, if the pipe has no end, such as after the pipes are already connected by a joint, the pipe cannot be passed through the water stop ring and it is difficult to use the pipe.

Japanese Unexamined Patent Publication No. 2012-250392

Therefore, one aspect of the present invention is a water blocking material restraining tool and an underground buried type pipe that can prevent the water blocking material from peeling off and can perform water blocking work even after the pipes are already connected by a joint. Provided is a method for stopping water in a joint box.

The water blocking material retainer according to one aspect of the present invention is
A pair of first and second semi-cylindrical members, which are formed so that a circular pipe protruding from a wall surface can be sandwiched from the outside and are attached to the pipe by being tightened from the outside using a band.
One is connected to the end of the first semi-cylindrical member along the semicircumference of the first semi-cylindrical member, and the other is connected to the end of the second semi-cylindrical member along the semicircumference of the second semi-cylindrical member. The first and second flange parts that are connected along the wall and press the waterproof material that covers the gap between the pipe and the wall surface against the wall surface.
One end side of the first semi-cylindrical member and the second semi-cylindrical member are connected to each other so that the paired first semi-cylindrical member and the second semi-cylindrical member can swing in a direction forming a cylinder. With a hinge to do
Equipped with a,
The first and second flange portions are characterized in that the pipes are sandwiched from the outside so that a part of the tip portions on the hinge side of each other overlap each other .

Further, it is preferable that the first and second flange portions are formed so that parts of the first and second flange portions overlap each other with the pipe sandwiched from the outside.

Further, it is preferable that the inner diameters of the first and second semi-cylindrical members are formed to be substantially the same as the outer diameter of the pipe.

The method for stopping water in the underground pipe joint box according to one aspect of the present invention is as follows.
A pair of first and second semi-cylindrical members, one connected to the end of the first semi-cylindrical member along the semicircle of the first semi-cylindrical member, and the other a second semi-cylindrical member. The first and second flange portions connected to the end of the second semi-cylindrical member along the semi-circumferential circumference, and the paired first semi-cylindrical member and the second semi-cylindrical member. First and first using a water blocking material retainer having a first semi-cylindrical member and a hinge connecting one end side of the second semi-cylindrical member so as to be swingable in the direction forming the cylinder. The process of applying a waterproof material to the surface of the flange part of 2 and
By swinging the first and second semi-cylindrical members around the hinge as a fulcrum, pipes are piped from the wall surface of the pipe joint box buried underground to store the pipe joints connecting the circular pipes buried underground. The process of sandwiching the piping protruding inside the joint box between the first and second semi-cylindrical members,
With the pipe sandwiched between the first and second semi-cylindrical members, the first and second bands are used while pressing the water blocking material applied to each surface of the first and second flanges against the wall surface. The process of attaching a water blocking material retainer to the pipe by tightening the semi-cylindrical member from the outside,
Equipped with a,
The first and second flange portions are characterized in that the pipes are sandwiched from the outside so that a part of the tip portions on the hinge side of each other overlap each other .

In addition, a process of applying a waterproof material to the wall surface along the outer circumference of the pipe is further provided.
It is preferable that the first and second flange portions are pressed against the wall surface by combining the water blocking material applied to each surface of the first and second flange portions and the water blocking material applied to the wall surface.

According to one aspect of the present invention, it is possible to prevent the water blocking material from peeling off and to perform the water stopping work even after the pipes are already connected by the joint.

This is an example of a cross-sectional configuration diagram showing the configuration of a gas station according to the first embodiment. It is a figure which shows an example of the structure of the underground buried pipe joint box and the inside of the pipe joint box in Embodiment 1. FIG. It is a flowchart and construction explanatory drawing which shows the main part process of the water-stopping method of the underground buried type pipe joint box in Embodiment 1. FIG. It is a front view which shows an example of the structure of the water stop material holding tool in Embodiment 1. FIG. It is a rear view of the water stop material holding tool shown in FIG. It is a figure for demonstrating the opening / closing mechanism of the water stop material holding tool shown in FIG. It is a bottom view of the water stop material holding tool shown in FIG. It is a top view of the water stop material holding tool shown in FIG. It is a left side view of the water stop material holding tool shown in FIG. It is a right side view of the water stop material holding tool shown in FIG. It is a figure which shows an example of the state which tightened the water stop material retainer by the fixing band in Embodiment 1. FIG. It is a figure which shows the method of the water-stopping measure of the joint between wall surfaces in Embodiment 1. FIG.

Embodiment 1.
FIG. 1 is an example of a cross-sectional configuration diagram showing a configuration of a gas station according to the first embodiment. In FIG. 1, a storage tank 102 (underground tank) is buried underground (underground) at a gas station represented by a gas station. On the other hand, a measuring machine (lubricator) 104 is arranged on the ground. Further, on the ground, a pipe injection port 116 for receiving fuel oil injection from the tank lorry vehicle 106 is arranged. The storage tank 102 and the weighing machine 104 are connected by a pipe 112. Further, the storage tank 102 and the pipe injection port 116 are connected by a pipe 114. Further, when the pressure in the storage tank 102 exceeds a predetermined value, the gas vaporized for pressure adjustment is released into the atmosphere from the discharge valve 130 via, for example, the pipe 114. Such pipes 112 and 114 are buried underground (underground).

At gas stations, in addition to gas stations (GS) (or SS: service stations) that sell fuel oil such as gasoline, light oil, and kerosene to general vehicles 300, vehicles used by transportation companies for their own business. It also includes gas stations that supply fuel oil to (taxis, buses, trucks, etc.). The fuel oil referred to here may also contain liquefied natural gas, liquefied hydrogen, and the like.

When the tank lorry vehicle 106 arrives at the gas station, the piping of the tank lorry vehicle 106 is connected to the pipe inlet 116. After that, the fuel oil carried by the tank lorry vehicle 106 flows through the pipe 114 and is injected into the storage tank 102.

The weighing machine 104 arranged on the ground dispenses (refuels) the fuel oil 101 stored in the storage tank 102 to the vehicle 300 via the pipe 112. For example, the fuel oil 101 stored in the storage tank 102 is transferred by a pump (not shown) arranged in the measuring machine 104.

Here, these circular pipes 112 and 114 are connected to a pipe extending from the storage tank 102 in a joint box 100 buried underground for inspecting the storage tank 102 by a pipe joint.

FIG. 2 is a diagram showing an example of the configuration inside the underground pipe joint box and the pipe joint box according to the first embodiment. The underground pipe joint box 100 has a box main body 120, an adjusting frame 122, and a manhole cover 124. The box body 120 is formed in the shape of a rectangular parallelepiped box having an open upper surface by combining, for example, steel plates. Then, the box body 120 is buried underground and is arranged on a storage tank 102 buried underground. Here, since the height position of the ground surface is not always uniform, the upper surface of the box body 120 is buried so as to be lower than the ground surface. Then, the adjustment frame 122 is inserted from above into the inside or outside of the side wall of the box body 120, and the adjustment frame 122 is placed on the box body 120. At that time, the arrangement height of the adjustment frame 122 is adjusted so that the upper end of the adjustment frame 122 is at the same height position as the ground surface. Since the final height can be adjusted with the adjustment frame 122, the construction of the box body 120 can be facilitated. The upper surface of the adjusting frame 122 is covered with a steel plate and is opened so that the central portion can be inspected. The opening is covered with the manhole cover 124, and the inside of the joint box 100 can be inspected by removing the manhole cover 124 at the time of inspection.

The pipes 112 and 114 buried in the ground are arranged so as to penetrate the wall surface of the joint box 100 and project into the joint box 100. Then, in the joint box 100, the pipe 116 extending upward from the storage tank 102 is connected to the pipe joint 118. In this way, since the pipes 112 and 114 penetrate the wall surface of the joint box 100, groundwater enters the joint box 100 from the gap (part A) of the through hole on the wall surface of the joint box 100 that remains after passing through these pipes 112 and 114. It leaks inside. Therefore, conventionally, a putty material is applied to the gap between the pipe 112 (or the pipe 114) and the wall surface to prevent such intrusion of groundwater. However, as described above, the putty material was peeled off due to the aged deterioration of the putty material and the water pressure of the groundwater, and the groundwater leaked into the joint box 100. Further, the conventional putty material needs to be installed in a dry state, and has a problem that it takes time to repair a part that has leaked once.

Therefore, in the first embodiment, a water expansion sealing material is used as the water blocking material 20. For example, it is preferable to use a moisture-curable putty-like (caulking type) material. The water expansion sealing material may be a commercially available product. For example, it is preferable to use a waterproof sealing material (Ultra Seal series) manufactured by ADEKA Corporation. Then, the water blocking material 20 is applied around the pipes 112 and 114 so as to cover the gaps between the through holes, and the water blocking material 20 is suppressed by the water blocking material restraining tool 10 so that the water blocking material 20 is not peeled off by water pressure. .. The water blocking material retainer 10 is fixed to the pipe 112 (or the pipe 114) by the fixing band 30. As long as the water blocking material retainer 10 does not come off from the pipe 112 (or pipe 114), the water blocking material 20 is continuously suppressed, so that the water blocking material 20 is prevented from peeling off due to aged deterioration of the water blocking material 20 or the water pressure of groundwater. it can.

FIG. 3 is a flowchart and a construction explanatory view showing the main steps of the water stopping method of the underground buried type pipe joint box according to the first embodiment. In FIG. 3, the water stopping method of the underground buried pipe joint box according to the first embodiment is a water blocking material coating step (S102), a sandwiching step (S104), a pressing step (S106), and a tightening step (S108). A series of steps is carried out.

First, as a pretreatment step, it is preferable to temporarily fix the pipes 112 and 114 with, for example, an underwater putty (referred to as an underwater adhesive) so as to close the gap between the through holes on the wall surface of the joint box 100 through which the pipes 112 and 114 penetrate. It is not always necessary to carry out such pretreatment, but if it is carried out, the water stopping effect can be further improved. The underwater putty may be a commercially available product. By using the underwater putty, temporary fixing can be performed even when the putty is wet with groundwater or the like. As the underwater putty, it is preferable to use, for example, a sewerage bonding agent (manufactured by Sekisui Chemical Co., Ltd.).

As the water blocking material application step (S102), the water blocking material 20 is applied to the surfaces of the flange portions (first and second flange portions) of the water blocking material restraining tool 10 by using the water blocking material restraining tool 10. ..

FIG. 4 is a front view showing an example of the configuration of the water blocking material retainer according to the first embodiment.
FIG. 5 is a rear view of the water blocking material retainer shown in FIG.
FIG. 6 is a diagram for explaining an opening / closing mechanism of the water blocking material retainer shown in FIG.
FIG. 7 is a bottom view of the water blocking material retainer shown in FIG.
FIG. 8 is a plan view of the water blocking material retainer shown in FIG.
FIG. 9 is a left side view of the water blocking material retainer shown in FIG.
FIG. 10 is a right side view of the water blocking material retainer shown in FIG. Further, the right side view of the water blocking material restraining tool shown in FIG. 10 is substantially symmetrical with the left side view shown in FIG. 9, except that the contour line of the end portion of the overlapping portion 13 appears.

In FIGS. 4 to 10, the water blocking material retainer 10 includes a pair of semi-cylindrical member 16 (first semi-cylindrical member), semi-cylindrical member 18 (second semi-cylindrical member), and flange portion 12 (third). It has a flange portion (1) and a flange portion (14 (second flange portion)). One of the flange portions 12 and 14 is connected to the end of the semi-cylindrical member 16 along the semicircumference of the semi-cylindrical member 16, and the other is connected to the end of the semi-cylindrical member 18 to the semicircumference of the semi-cylindrical member 18. Connected along. Here, the flange portion 12 is connected to the end of the semi-cylindrical member 16 along the semicircumference of the semi-cylindrical member 16. Then, the flange portion 14 is connected to the end of the semi-cylindrical member 18 along the semicircumference of the semi-cylindrical member 18. As shown in FIG. 6, the paired semi-cylindrical member 16 and the semi-cylindrical member 18 are oscillatingly connected to each other by a hinge 19 in the direction forming the cylinder. As a result, the semi-cylindrical member 16 and the semi-cylindrical member 18 can be opened and closed with the hinge 19 as a fulcrum, and the pipe 112 (or the pipe 114) can be sandwiched between the semi-cylindrical member 16 and the semi-cylindrical member 18 from the outside. it can.

It is preferable that the circular inner diameter formed by connecting the semi-cylindrical members 16 and 18 is formed to be substantially the same as the outer diameter of the water-stopping pipe 112 (or pipe 114). Further, it is preferable that the lengths of the semi-cylindrical members 16 and 18 are larger than the width of the fixed band 30 so that they can be tightened by the fixed band 30.

Further, the flange portions 12 and 14 are formed so as not to protrude to the inner peripheral side of the semi-cylindrical members 16 and 18. Here, the through hole on the wall surface of the joint box 100 is formed with a diameter slightly larger than the outer diameter dimension of the pipe 112 (or the pipe 114) through which the joint box 100 is passed. As shown in FIG. 3, the gap L'is formed so as to open, for example, about 5 mm along the outer circumference of the pipe 112 (or the pipe 114). It is preferable that the flange portions 12 and 14 are formed so that the width of the flange (= outer peripheral radius-inner peripheral radius) is three times or more the gap L'. As a result, as will be described later, the water blocking material 20 can be pressed with a size of three times or more the gap L in the radial direction of the through hole on the wall surface of the joint box 100.

The water blocking material retainer 10 is formed by processing, for example, a metal plate having a predetermined thickness (for example, about 0.5 to 1.2 mm is preferable). Then, the flange portion 12 and the semi-cylindrical member 16 can be connected by, for example, welding (for example, spot welding). Similarly, the flange portion 14 and the semi-cylindrical member 18 can be connected by, for example, welding (for example, spot welding). The metal used as the material is preferably a material that does not easily corrode. For example, stainless steel is suitable. For example, nickel-free ferritic stainless steel is resistant to corrosion, and two-phase stainless steel, which has two phases of ferrite and austenitic in the metal structure, is resistant to stress corrosion cracking. However, the present invention is not limited to this, and other metal materials may be used. When a material that is easily corroded in a moist environment is used, anticorrosive coating or the like may be applied. Further, the material is not limited to a metal material, and a plastic material, a ceramic material, a metal oxide, or the like may be used. Among the ceramic materials, alumina, silicon nitride, silicon carbide and the like are particularly suitable materials having high corrosion resistance. Further, as a non-ferrous metal alloy, a titanium alloy is suitable because it has excellent corrosion resistance.

Further, the paired flange portions 12 and 14 are formed so that the semi-cylindrical member 16 and the semi-cylindrical member 18 are closed so as to form a cylinder, and a part of the tip portions of the flange portions 12 and 14 overlap each other. In the examples of FIGS. 4 to 9, the flange portion 12 is formed by extending the overlapped portion 15 (b portion) further from the semicircumferential end of the semi-cylindrical member 16 at the end portion on the hinge 19 side. The flange portion 14 is formed by extending the overlapped portion 13 (a portion) further from the semicircumferential end of the semi-cylindrical member 18 to the end portion on the open end side. With this configuration, the open end portion of the flange portion 12 and the overlapping portion 13 overlap with each other in a state where the semi-cylindrical member 16 and the semi-cylindrical member 18 are closed. Similarly, the end portion of the flange portion 14 on the hinge 19 side and the overlapping portion 15 overlap. By providing the overlapping portion, it is possible to prevent the water blocking material 20 from leaking from the gaps between the flange portions 12 and 14 when the water blocking material 20 is pressed, as will be described later.

Using the water blocking material restraining tool 10, the water blocking material 20 is applied to the surfaces of the flange portions 12 and 14 of the water blocking material restraining tool 10 (the surface on the side where the semi-cylindrical member 16 is not provided). The water blocking material 20 may be applied so as to slightly project inward from the inner peripheral side ends of the flange portions 12 and 14. Further, it is preferable to apply it to the entire surface of the flange portions 12 and 14, but the present invention is not limited to this. Desirably, it is desirable to apply the coating to a height D that is at least three times the gap L'when the pipe 112 (or the pipe 114) is passed through the through hole on the wall surface of the joint box 100.

Further, in the water blocking material application step (S102), it is more preferable to apply the water blocking material 20 to the wall surface of the joint box 100 along the outer circumference of the water blocking pipe 112 (or the pipe 114).

As the sandwiching step (S104), the pipe 112 (or the pipe 114) to be water-stopped, which protrudes from the wall surface of the pipe joint box 100 into the pipe joint box 100, is sandwiched between the semi-cylindrical members 16 and 18. At that time, it goes without saying that the flange portions 12 and 14 coated with the water blocking material 20 are directed to the wall surface side on which the pipe 112 (or the pipe 114) protrudes.

In the pressing step (S106), with the pipe 112 (or pipe 114) to be water-stopped sandwiched between the semi-cylindrical members 16 and 18, the water-stopping material 20 applied to each surface of the flange portions 12 and 14 is applied to the wall surface. Press on. When the pressing material 20 is also applied to the wall surface side in advance, the flange portions 12 and 14 are the water blocking material 20 applied to each surface of the flange portions 12 and 14 and the water blocking material 20 applied to the wall surface. And press it against the wall surface. As a result, the flange portions 12 and 14 integrally press the water blocking material 20 that covers the gap between the pipe 112 (or the pipe 114) and the wall surface of the pipe joint box 100 against the wall surface.

As a tightening step (S108), the water blocking material 20 applied to each surface of the flange portions 12 and 14 is applied to the wall surface in a state where the pipe 112 (or the pipe 114) to be stopped is sandwiched between the semi-cylindrical members 16 and 18. The semi-cylindrical members 16 and 18 are tightened to the pipe 112 (or the pipe 114) from the outside by using the fixing band 30 while pressing against.

FIG. 11 is a diagram showing an example of a state in which the water blocking material retainer is tightened with the fixing band according to the first embodiment. In FIG. 11, piping is omitted. As shown in FIG. 11, the fixed band 30 is preferably a fixed band capable of gradually reducing the length of the band rather than a simple binding band. For example, a metal band in which the band is gradually squeezed using a tool such as a screwdriver is suitable. The mechanism for narrowing the length of the band is not limited to this, and a mechanism for gradually narrowing the length of the band by manually turning the screw knob without using a tool is also preferable. By gradually squeezing the band, the outer circumferences of the semi-cylindrical members 16 and 18 can be tightened with a substantially uniform force. By tightening the outer circumferences of the semi-cylindrical members 16 and 18 with a substantially uniform force, it is possible to prevent the semi-cylindrical members 16 and 18 from being displaced and the water blocking material 20 from leaking out.

As described above, by tightening the semi-cylindrical members 16 and 18 to the pipe 112 (or the pipe 114) from the outside using the fixing band 30, the water blocking material restraining tool 10 is attached to the pipe 112 (or the pipe 114). Here, the width L of the water blocking material 20 between the flange portions 12 and 14 and the wall surface of the joint box 100 is at least twice the dimension in which the underwater putty used for temporary fixing is applied, for example, in a fillet welded shape. Is suitable.

By suppressing the water blocking material 20 with the water blocking material restraining tool 10 as described above, it is possible to prevent the water blocking material 20 from peeling off due to aged deterioration of the water blocking material 20 or the water pressure of groundwater. Further, in the first embodiment, since the water-stopping material 20 uses the water-expanding sealing material, the water-stopping material 20 absorbs groundwater and expands, but is suppressed by the water-stopping material restraining tool 10. The water blocking effect can be improved.

As described above, according to the first embodiment, the water blocking material 20 can be prevented from peeling off, and the water stopping work can be performed even after the pipes 114 and 116 are already connected to each other by the joint 118.

Here, in the joint box 100, as shown in FIG. 2, the adjustment frame 122 is inserted from above inside or outside the side wall of the box body 120, and the adjustment frame 122 is placed on the box body 120. Therefore, groundwater leaks into the joint box 100 from the gap (part B) between the side wall of the box body 120 and the side wall of the adjusting frame 122. Therefore, conventionally, the putty material is also applied to the gap between the side wall of the box body 120 and the side wall of the adjusting frame 122 to prevent such intrusion of groundwater. However, as described above, in such construction, the putty material is peeled off due to aged deterioration of the putty material and the water pressure of groundwater. Therefore, in the first embodiment, the cured sheet is attached along the joint between the side wall of the box body 120 and the side wall of the adjusting frame 122.

FIG. 12 is a diagram showing a method of waterproofing measures for joints between wall surfaces in the first embodiment. As shown in FIG. 12, the cured sheet 50 is attached along the joint between the side wall of the box body 120 and the side wall of the adjusting frame 122. For example, it is more desirable to attach the cured sheet 50 to the entire joint (one round). As the curing sheet 50, for example, it is preferable to use an ultraviolet curable sheet. For example, it is preferable to use a sheet obtained by applying a photocuring agent to an epoxy acrylate resin. Further, it is even better to laminate the reinforcing material sheets.

As a construction method, for example, along the joint between the side wall of the box body 120 and the side wall of the adjustment frame 122, the side wall of the box body 120 and the side wall of the adjustment frame 122 are subjected to primer treatment with a predetermined width from the joint, and then primer treatment is applied. The cured sheet 50 is attached to the surface. After that, the curing sheet 50 is irradiated with energy such as ultraviolet rays and heat to be cured. For example, shine an ultraviolet light. Since the cured sheet 50 itself is soft, there is a large degree of freedom in the place where it is attached, and it is possible to facilitate water-stopping construction. Further, once cured, the mechanical strength is high, so that it can withstand the water pressure of groundwater. Further, the mechanical strength of the joint box 100 itself can be improved by such mechanical strength. Further, it is more preferable to use a transparent sheet for the cured sheet 50. By using a transparent sheet, construction can be done while looking at the seams. It is also preferable to attach the cured sheet 50 after temporarily fixing it with an underwater putty.

The embodiment has been described above with reference to a specific example. However, the present invention is not limited to these specific examples. In the above-mentioned example, the case where the semi-cylindrical members 16 and 18 are connected by the hinge 19 is shown, but the present invention is not limited to this. The semi-cylindrical members 16 and 18 may be separated as separate bodies as long as the pipe 112 or the like is sandwiched therein. Further, there is no problem even if a plurality of link-shaped members for sandwiching the two semi-cylindrical members are provided.

In addition, although the description of parts that are not directly necessary for the description of the present invention, such as the device configuration and control method, is omitted, the required device configuration and control method can be appropriately selected and used.

In addition, all anomaly detection methods and anomaly detection devices that include the elements of the present invention and can be appropriately redesigned by those skilled in the art are included in the scope of the present invention.

10 Water stop material retainer 12, 14 Flange part 13, 15 Overlapping part 16, 18 Semi-cylindrical member 19 Hinge 20 Water stop material 30 Fixing band 100 Joint box 102 Storage tank 104 Weighing machine 106 Tank truck 112, 114 Piping 116 Note Entrance 120 Box body 122 Adjustment frame 124 Manhole cover 130 Release valve 300 Vehicle

Claims (4)

A pair of first and second semi-cylindrical members, which are formed so that a circular pipe protruding from a wall surface can be sandwiched from the outside and are attached to the pipe by being tightened from the outside using a band.
One is connected to the end of the first semi-cylindrical member along the semicircumference of the first semi-cylindrical member, and the other is connected to the end of the second semi-cylindrical member of the second semi-cylindrical member. The first and second flange portions that are connected along the semicircle of the pipe and press the water blocking material that covers the gap between the pipe and the wall surface against the wall surface.
One end side of the first semi-cylindrical member and the second semi-cylindrical member are connected to each other so that the paired first semi-cylindrical member and the second semi-cylindrical member can swing in a direction forming a cylinder. With a hinge to do
Equipped with a,
The first and second flange portions are water-stopping material retainers, characterized in that the pipes are sandwiched from the outside and a part of the tip portions on the hinge side of each other is formed so as to overlap each other. It said first circular inner diameter which the second semi-cylindrical member formed is connected, the water stopping material suppressing device as in Claim 1, wherein a is substantially equal to the outside diameter of the pipe. A pair of first and second semi-cylindrical members, one connected to the end of the first semi-cylindrical member along the semicircle of the first semi-cylindrical member, and the other connected to the second semi-cylindrical member. The first and second flange portions connected to the end of the semi-cylindrical member along the semicircle of the second semi-cylindrical member, and the paired first semi-cylindrical member and the second Using a water blocking material retainer having a hinge that connects one end side of the first semi-cylindrical member and one end side of the second semi-cylindrical member so that the semi-cylindrical member can swing in a direction forming a cylinder, A step of applying a water blocking material to the surfaces of the first and second flange portions, and
By swinging the first and second semi-cylindrical members with the hinge as a fulcrum, the wall surface of the underground pipe joint box for storing the pipe joints connecting the circular pipes buried underground is described. The step of sandwiching the pipe protruding inside the pipe joint box between the first and second semi-cylindrical members, and
With the pipe sandwiched between the first and second semi-cylindrical members, a band is used while pressing the water blocking material applied to each surface of the first and second flange portions against the wall surface. A step of attaching the water blocking material retainer to the pipe by tightening the first and second semi-cylindrical members from the outside, and
Equipped with a,
The first and second flange portions are formed so that a part of the tip portions on the hinge side of each other overlap with each other in a state where the pipe is sandwiched from the outside. How to stop water. A step of applying a water blocking material to the wall surface along the outer circumference of the pipe is further provided.
The first and second flange portions are pressed against the wall surface by combining the water blocking material applied to each surface of the first and second flange portions and the water blocking material applied to the wall surface. The method for stopping water in an underground pipe joint box according to claim 3, wherein the method is to be used.

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