JP6333526B2 - Piping unit for temporary toilet installation - Google Patents

Description

  The present invention relates to a temporary toilet installation piping unit.

  When a disaster such as an earthquake occurs, a large number of people may evacuate to an evacuation site. In such a case, a large number of toilets are required, but usually there are few toilets installed in the evacuation site or only a few toilets are installed.

  For this reason, conventionally, a temporary toilet installation piping unit has been proposed in which a plurality of temporary toilets can be installed at the time of a disaster in an evacuation site (see, for example, Patent Documents 1 to 4). The temporary toilet pipe unit is buried in an evacuation site in advance with a temporary toilet omitted before a disaster occurs. When a disaster occurs, a plurality of temporary toilets can be easily installed in the temporary toilet piping unit.

  The piping unit for temporary toilet installation of Patent Document 1 is connected to a drain pipe that is buried in the ground and extends in the lateral direction with an outer peripheral surface of the drain pipe being spaced apart from each other, and an upper end is opened to the ground surface. And a plurality of vertical tubes on which a toilet can be installed. Moreover, it has the manhole to which the one end part of the drainage pipe was connected, the outflow pipe which connects the manhole and the existing sewer pipe, and flows out the filth and fluid in the manhole to the sewer pipe. Furthermore, one end of the drain pipe projects into the manhole. In the manhole, a water storage gate (valve device) that opens and closes an opening of a drain pipe in the manhole is provided.

  The temporary toilet installation piping unit of Patent Document 2 is provided with a plurality of manholes buried in the ground and connected by drain pipes extending in the lateral direction, and provided in the middle of the drain pipe to flow down to accelerate the flow velocity of the fluid in the drain pipe And an acceleration unit. The piping unit for temporary toilet installation of Patent Document 2 is a water pouring method in which filth in the drain pipe is discharged into a manhole with water, and filth and fluid are not stored in the drain pipe.

The temporary toilet installation piping unit of Patent Document 3 is provided in a drain pipe and a plurality of vertical pipes similar to Patent Document 1, a relay pipe connected between the drain pipe and an existing sewer pipe, and the relay pipe. A first valve device, and a second valve device spaced apart from the first valve device.
A gate valve is used as the first valve device, and a butterfly valve is used as the second valve device. This is because the gate valve is poor in water-stopping performance, and the water-stopping performance is ensured by the rose fly valve. A butterfly valve is a valve body that is attached to a shaft that traverses a flow path so that the valve body can rotate freely. The body is left crossing the flow path up and down.

The temporary toilet installation piping unit of Patent Document 4 includes a drain pipe similar to Patent Document 3, a plurality of vertical pipes, and a large storage tank to which the drain pipe is connected. An opening is provided at the bottom of the large storage tank, and the opening at the bottom and the existing sewage pipe are connected by a relay pipe. A valve lid for opening and closing the opening at the bottom is provided in the large storage tank.
In Patent Document 4, since the pressure of dirt or fluid on the valve lid acts in a direction of urging the valve lid toward the opening at the bottom, there is no possibility that the water stoppage of the valve lid will deteriorate.

Japanese Patent No. 4104197 Japanese Patent No. 4093895 Japanese Patent No. 4679426 Japanese Patent No. 4849945

However, in Patent Document 1, one end portion of the drain pipe projects into the manhole, and a water storage gate (valve device) that opens and closes the opening of the one end portion of the drain pipe is provided in a state of overhanging in the manhole. . Therefore, the space near the water storage gate in the manhole is narrowed, and maintenance of the water storage gate may be difficult.
Moreover, since the pressure of the filth and the fluid in the drain pipe acts in a direction to separate the water storage gate from the drain pipe, the water stoppage of the water storage gate may be deteriorated.

  In addition, if the existing sewer pipe is damaged, it is only possible to collect and collect it from the toilet nearest to the manhole without opening the water storage gate, and collect it in a small drainage pipe. If it is delayed, sewage may come up to the toilet. In addition, despite the fact that the sewer pipe is damaged, there are cases where it cannot be recovered unless the gate is opened once and put into the manhole, and if sewage flows through the manhole, the sewage flows into the damaged sewer pipe. As a result, sewage leaks from the sewer pipe.

  In Patent Document 2, since water is poured into the drain pipe without storing it, the amount of water used is very large. Normally, water is insufficient at the time of a disaster, but when trying to save water, filth remains accumulated in the vertical pipe and the drain pipe, and therefore, a bad odor is likely to occur compared to the case where sewage is stored in the drain pipe. Further, when the amount of water used is reduced, the filth becomes agglomerated, which may clog the manhole inlet, outlet, or sewage pipe.

  In Patent Document 3, even when the butterfly valve is fully opened, the shaft and the valve body that has turned sideways remain so as to cross the relay pipe up and down, so that there is a possibility that dirt is caught on the shaft and the valve body. Moreover, since the relay pipe is buried in the ground, it becomes difficult to maintain the first valve device and the second valve device in the relay pipe.

In Patent Document 4, since the weight of dirt and fluid on the bottom acts on the valve lid at the bottom, there is a possibility that the opening operation of the valve lid may be difficult. For this reason, since it is necessary to open a valve cover frequently before the weight of the dirt and fluid which act on a valve cover becomes so large, the operation | work is troublesome.
In addition, since the opening for discharging filth and fluid is provided at the bottom of the large storage tank, it is necessary to dig a hole through the piping for discharging filth and fluid from the opening below the bottom. Man-hours increase.
In addition, since an elbow is required to connect the bottom opening and the outflow pipe leading to the sewer pipe, if there is not much difference between the manhole and sewer pipe depth, or if the manhole and sewer pipe are close, In order to create a gradient that allows natural flow down to the sewer pipe, the depth of the manhole must be reduced, and the manhole cannot have sufficient capacity.

  The present invention has been made in view of the above-described problems, and facilitates maintenance of a valve device that opens and closes a flow path of filth and fluid, improves the water stoppage of the valve device, It is an object of the present invention to provide a temporary toilet installation piping unit that can easily collect filth and fluid in manholes and drain pipes at an appropriate timing even when they are damaged.

  Further, the present invention can reduce the amount of water used, and even in this case, a temporary toilet installation piping unit that can prevent filth from accumulating in the vertical pipe and the drain pipe or clogging the manhole and the sewer pipe. The purpose is to provide.

  Furthermore, the present invention eliminates the trapping of filth on the valve device, facilitates the operation of the valve device for opening and closing the flow path of filth and fluid, and omits the work of digging a hole under the manhole. And it aims at providing the piping unit for temporary toilet installation which can ensure sufficient manhole depth, even when connecting with the sewer pipe installed in the position which is not deep.

In order to achieve the above object, in the temporary toilet installation piping unit according to the present invention, the drain pipe buried in the ground along the lateral direction and the drain pipe are spaced apart from each other along the longitudinal direction thereof. A plurality of vertical pipes connected and extending in the vertical direction, a manhole to which one end of the drain pipe is connected, an outflow pipe connected to the side wall of the manhole, and connecting the manhole and an existing sewer pipe; A valve device that opens and closes the opening of the outflow pipe in the manhole, the outflow pipe is provided on the bottom side of the side wall of the manhole, and the valve body of the valve device is movable in the vertical direction. , the bottom of the manhole, groove fitting the lower end portion of the valve body is provided in the valve device, the groove is not extend from one end of the drainage tube into the opening of the outflow pipe, In the drain That forms a guide path for guiding the water to the outlet pipe is characterized in.

  According to the piping unit for temporary toilet installation according to the present invention, the opening of the outflow pipe can be opened and closed by the valve device without causing the outflow pipe to protrude into the manhole, so that the valve device is brought close to the side wall of the manhole. Can be arranged. Therefore, the valve device does not protrude greatly into the manhole, and the space for maintenance of the valve device in the manhole can be widened, and the maintenance of the valve device can be facilitated using this space.

Further, in the state where the outflow pipe is closed by the valve device, the pressure of the filth and fluid in the manhole acts in the direction of urging the valve device toward the outflow pipe side, so that the water stoppage of the valve device can be improved. .
Since the valve body can arrange | position a valve body along a side wall, the whole weight of the dirt and fluid in a manhole does not act directly on a valve body, and can improve the operativity of a valve apparatus.
Further, in order to discharge the dirt and fluid in the drain pipe into the manhole, there is no need to operate the valve device in the manhole. Therefore, even if the existing sewage pipe is damaged, the filth and fluid in the manhole and drainage pipe can be easily collected from the manhole at an appropriate timing by closing the valve body of the valve device and using a sanitary vehicle. . Accordingly, it is possible to eliminate the problem that the filth and the fluid do not flow into the sewer pipe and the sewage leaks from the damaged sewer pipe.

  Moreover, since the filth and fluid in the drain pipe can be discharged to the manhole without operating the valve device in the manhole and without using water, the amount of water used can be reduced. Even in this case, since the filth does not become agglomerated, it is possible to prevent the filth from accumulating in the vertical pipe and the drain pipe or clogging the manhole and the sewer pipe.

Furthermore, as the valve device, when the flow path is opened, it is not necessary to use a shaft or a lateral valve body that remains in the middle of the flow path of dirt or fluid like a butterfly valve. It is possible to prevent filth from being caught in the middle of the flow path.
Further, since the outflow pipe is connected to the side wall of the manhole, the work of digging a hole under the manhole can be omitted.

  Furthermore, in the temporary toilet installation piping unit according to the present invention, since the end (opening) of the outflow pipe connected to the existing sewer pipe is connected to the side wall of the manhole, the depth of the manhole and the sewer pipe is set. Even when there is not much difference or when the manhole and the sewer pipe are close to each other, a larger gradient can be applied to the outflow pipe than when the opening is provided at the bottom of the manhole. Therefore, sufficient manhole depth and capacity can be ensured even when connecting to a sewer pipe installed at a position not deep.

In this case, the water stop of the valve device can be further improved by fitting the lower end portion of the valve body into the groove in the bottom portion. Further, the valve body can be prevented from wobbling when the valve body is lowered.
Further, in this case, since the stored matter and fluid drained from the drain pipe and stored in the manhole are smoothly guided to the opening of the outflow pipe, it is possible to suppress the accumulation of filth in the manhole. .

Further, in the temporary toilet installation piping unit according to the present invention, the end of the drain pipe does not protrude into the manhole, and the end of the outflow pipe protrudes toward the groove at the bottom of the manhole. Also good.

  According to the temporary toilet installation piping unit of the present invention, the maintenance of the valve device for opening and closing the flow path is facilitated, the water stoppage of the valve device is improved, the operability of the valve device is improved, Even when the sewage pipe is damaged, the sanitary vehicle or the like can easily collect filth and fluid in the manhole and the drain pipe at an appropriate timing.

  In addition, according to the temporary toilet installation piping unit of the present invention, the amount of water used can be reduced, and even when the amount of water used is reduced, it is possible to prevent clogging of manholes and sewage pipes with filth. There is an effect that can be done.

  Furthermore, according to the piping unit for temporary toilet installation of the present invention, it becomes possible to prevent the filth from being caught on the valve device, omitting the work of digging a hole under the manhole, and being installed at a position not deep. Even when connected to a sewer pipe, there is an effect that a sufficient manhole depth can be secured.

It is a figure which shows embodiment of the piping unit for temporary toilet installation which concerns on this invention. It is the II-II sectional view taken on the line of FIG. It is the III-III sectional view taken on the line of FIG. It is a figure which shows the overflow pipe | tube provided in the manhole. It is sectional drawing which shows the structure of an overflow pipe | tube. It is a figure which shows the modification of an overflow pipe | tube.

  Hereinafter, a temporary toilet installation piping unit according to an embodiment of the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 1, the temporary toilet installation piping unit 1 of the present embodiment includes a drain pipe 4 embedded in the underground 3 along the horizontal direction, that is, along the ground surface 2, and the drain pipe 4. A plurality of vertical pipes 5 which are connected to each other along the longitudinal direction and extend in the vertical direction, a manhole 6 to which one end 4 a of the drain pipe 4 is connected, and a manhole connected to the side wall 7 of the manhole 6. 6 and an existing sewage pipe 8, and an outflow pipe 9 that opens and closes an opening 9 a (see FIG. 3) of the outflow pipe 9 in the manhole 6.

Next, each of the above components will be described in detail.
The drain pipe 4 may be, for example, an egg-shaped cross section in which the curvature radius of the upper outer peripheral surface is larger than the curvature radius of the lower outer peripheral surface, and is configured by a synthetic resin tube. A left end portion 4a of the drain pipe 4 in FIG. 1 is connected to a lower side of the right side in FIG. 1 on the side wall 7 of the manhole 6 via a manhole joint or the like (not shown) or directly.

  Connected to the upper portion of the outer peripheral surface of the drainage pipe 4 are a plurality of vertical pipes 5 extending in the vertical direction, here, in the longitudinal direction of the drainage pipe 4 and spaced apart from each other. The inside of each vertical pipe 5 communicates with the inside of the drain pipe 4. The upper end portion 5 a of the vertical tube 5 is located slightly below the ground surface 2. Each vertical pipe 5 is connected to the drain pipe 4 via a pipe joint (not shown). Thereby, since the lower part of the vertical pipe 5 becomes freely rotatable in the circumferential direction, even when a vibration or the like acts on the drain pipe 4 and the vertical pipe 5 when a disaster occurs, it is possible to suppress the vertical pipe 5 from being damaged. .

A cylindrical support member 11 that supports the temporary toilet, an inner lid 12 that opens and closes the upper opening of the vertical tube 5, an outer lid 13 that opens and closes the upper opening of the support member 11, etc. Is provided. A flange 11 a that protrudes outward is provided at the lower portion of the support member 11.
When a temporary toilet 14 (only one is shown) is installed at the upper end 5a of each vertical pipe 5 in the event of a disaster, the inner lid 12 and the outer lid 13 are removed, and the temporary toilet 14 is placed on the support member 11. And attach.

  The support member 11, the inner lid 12, the outer lid 13, and other components provided at the upper end portion 5a of each vertical tube 5 have the same configuration as the invention described in, for example, Japanese Patent No. 414197. can do.

The manhole 6 has a cylindrical side wall 7 extending in the vertical direction, a bottom 15 provided at the lower end of the side wall 7, and an upper lid 16 that opens and closes the upper opening of the side wall 7. The upper surface of the upper lid 16 is substantially the same as the ground surface 2 or slightly above or below the ground surface 2. An outflow pipe 9 connected to an existing sewer pipe 8 is connected to the side wall 7 of the manhole 6.
The drain pipe 4 and the outflow pipe 9 do not necessarily face each other in the manhole 6, and the drain pipe 4 is not limited to be provided on the lower side (bottom) of the side wall 7 of the manhole 6. .

  At the end of the outflow pipe 9 on the side of the manhole 6, a flange 9 b is provided in contact with or close to the inner surface of the side wall 7 of the manhole 6. Further, a valve device 10 is provided in the manhole 6 so as to be close to a portion of the side wall 7 to which the outflow pipe 9 is connected. The valve body 10a of the valve device 10 can be moved up and down manually or automatically by the operation unit 17 extending upward.

  When the valve body 10a of the valve device 10 is moved to the lower limit position, the valve body 10a fully contacts the surface of the flange 9b of the outflow pipe 9 and closes the opening 9a (see FIG. 3) of the outflow pipe 9. The opening 9a of the outflow pipe 9 can be opened by moving the valve body 10a upward. As the valve device 10, it is preferable to use a known device having no portion remaining in the opening 9 a of the outflow pipe 9 when the valve body 10 a is opened.

  Conventionally, a valve device is used to open and close the drain pipe 4 (see Patent Document 1). In the present invention, the valve device 10 is used to open and close the outflow pipe 9.

  On the upper surface of the bottom 15 of the manhole 6, there is provided an inclined surface that is inclined downward from the drain pipe 4 side to the outflow pipe 9 side. A concave groove 18 extending from the drain pipe 4 to the opening 9 a of the outflow pipe 9 is provided on the upper surface of the bottom portion 15. As shown in FIG. 2, the concave groove 18 has a semicircular cross section, and forms a guide path that guides drainage in the drainage pipe 4 to the outflow pipe 9. Side surfaces of both sides of the groove 18 in the bottom portion 15 are formed so as to be inclined downward toward the groove 18.

The dirt or the like on the bottom 15 falls on both side surfaces of the groove 18 and is inserted into the groove 18. When the opening 9 a (FIG. 3) of the outflow pipe 9 is opened by the valve device 10, dirt or the like that has fallen into the concave groove 18 is discharged from the opening 9 a of the outflow pipe 9 to the sewer pipe 8.
In addition, it is preferable that the radius of the semicircular arc portion of the concave groove 18 is approximately the same as the radius of the outflow pipe 9.

As shown in FIG. 3, a packing 19 is provided at the end of the concave groove 18 on the outflow pipe 9 side. In addition, an arc portion 10b that can be inserted into the groove 18 is formed on the lower side of the valve body 10a of the valve device 10, and a wide portion 10c that can contact the inclined surface of the bottom portion 15 is formed above the arc portion 10b. Is provided. The operation part 17 is provided so as to extend upward from the center of the upper surface of the wide part 10c.
In FIG. 3, the outflow pipe 9, the outflow pipe opening 9a, and the flange 9b are indicated by a two-dot chain line.

  When the valve body 10a of the valve device 10 is lowered to the lowest position, the arc portion 10b is inserted into the groove 18 and presses the packing 19. In this state, the surface of the valve body 10a on the outflow pipe 9 side is in full contact with the surface of the flange 9b on the outflow pipe 9 on the drain pipe 4 side, and the opening 9a of the outflow pipe 9 is closed. At this time, since the gap between the valve element 10a of the valve device 10 and the concave groove 18 is sealed by the packing 19, dirt and fluid in the manhole 6 leak out from the gap to the outflow pipe 9 side. Can be suppressed, and the water stoppage of the valve device 10 can be improved.

  By inserting the valve body 10a into the concave groove 18, the valve body 10a is prevented from wobbling and can be stably held at a predetermined position. The valve body 10a of the valve device 10 is preferably guided by a guide portion (not shown) so as to surely move up and down along a predetermined trajectory.

According to the temporary toilet installation piping unit 1 of the present embodiment, the upper opening of each vertical pipe 5 is closed during normal times, and when the disaster occurs, the upper opening of each vertical pipe 5 is opened. On top of that, the temporary toilet 14 can be easily installed and used.
When the temporary toilet 14 is used, waste and fluid can be discharged into the manhole 6 through the vertical pipe 5 and the drain pipe 4 without using water.

  At this time, when the opening 9 a of the outflow pipe 9 is closed by the valve device 10 in the manhole 6, the pressure of filth and fluid stored in the manhole 6 causes the valve body 10 a of the valve device 10 to flow out of the outflow pipe 9. Acts to bias to the side. Thereby, since the valve body 10a of the valve apparatus 10 is urged | biased by the flange 9b side of the outflow tube 9, and contact | abuts to the whole surface of the flange 9b, the water stop property of the valve apparatus 10 can be improved.

  Further, since it is not necessary to provide a structure for urging the valve body 10a toward the outflow pipe 9 in order to improve the water stoppage of the valve device 10, the configuration is simplified and the operability of the valve device 10 is improved. Can be improved.

  Further, since the outflow pipe 9 does not need to protrude into the manhole, the valve device 10 can be disposed close to the side wall 7 in the manhole 6. Therefore, the valve device 10 does not protrude greatly into the manhole 6, the space for maintenance of the valve device 10 in the manhole 6 can be widened, and the maintenance of the valve device 10 can be facilitated.

  Furthermore, even if the existing sewage pipe 8 is damaged, the valve device 10 closes the opening 9a of the outflow pipe 9 and opens the upper cover 16 of the manhole 6, whereby the stored matter in the manhole 6 and the drain pipe 4 is removed from the sanitary vehicle. Etc. can be collected easily. Accordingly, it is possible to eliminate the problem that filth and fluid do not flow through the sewer pipe 8 and the sewage leaks from the damaged sewer pipe.

  In addition, since the filth and fluid discharged from the temporary toilet 14 can be reliably discharged to the manhole 6 through the vertical pipe 5 and the drain pipe 4 with almost no use of water, it is possible to prevent the filth from becoming solid. As a result, it is possible to prevent the filth from clogging the drain pipe 4, the manhole 6, the outflow pipe 9 or the sewage pipe 8.

Furthermore, since the valve device 10 can be used without the shaft and the lateral valve body remaining in the flow channel when the flow channel is opened, dirt is caught in the middle of the outflow pipe 9. Can be prevented. Moreover, since the outflow pipe 9 is connected to the side wall 7 of the manhole 6, it is not necessary to dig a hole in the lower part of the manhole 6, and the installation work of the manhole 6 can be simplified.
Furthermore, since the end (opening) of the outflow pipe 9 connected to the existing sewage pipe 8 is connected to the side wall 7 of the manhole 6, there is not much difference between the depths of the manhole 6 and the sewage pipe 8. Even when the manhole 6 and the sewage pipe 8 are close to each other, a larger gradient can be applied to the outflow pipe 9 than when the opening is provided at the bottom of the manhole 6. Therefore, sufficient manhole depth and capacity can be ensured even when connecting to a sewer pipe 8 installed at a position that is not deep.

  Further, since the concave groove 18 for guiding the drainage in the drainage pipe 4 to the outflow pipe 9 is provided, the stored matter and fluid drained from the drainage pipe 4 and stored in the manhole 6 to the opening 9 a of the outflow pipe 9. Since it is guided smoothly, it is possible to suppress the accumulation of filth in the manhole 6.

FIG. 4 shows an overflow pipe 20 that adjusts the amount of filth and fluid stored in the manhole 6.
The overflow pipe 20 has a fixed pipe 21 that is connected to the upper part of the outflow pipe 9 and extends in the vertical direction, and a slide pipe 22 that is inserted into the fixed pipe 21 so as to be movable up and down, and whose upper part protrudes from the fixed pipe 21. ing. The upper and lower end surfaces of the slide pipe 22 are opened. In a state in which the valve device 10 is closed, dirt and fluid that have entered the slide pipe 22 from the opening at the upper end of the slide pipe 22 are discharged to the sewer pipe 8 through the fixed pipe 21 and the outflow pipe 9.

  A packing 23 slidable with respect to the fixed pipe 21 is fixed to the lower side of the outer peripheral surface of the slide pipe 22 of the overflow pipe 20 as shown in FIG. Two or more packings 23 can be provided. Thus, the slide pipe 22 is inserted into the fixed pipe 21 so as to be slidable up and down and to be stopped at an arbitrary position. Note that a stopper (not shown) that prevents the slide pipe 22 from coming out of the fixed pipe 21 is preferably provided between the fixed pipe 21 and the slide pipe 22.

  The overflow pipe 20 can adjust the storage amount of the stored matter (dirt or fluid) 25 stored in the manhole 6 by adjusting the vertical position of the slide pipe 22. In addition, the code | symbol 25a in FIG.

  As mentioned above, although embodiment of the piping unit for temporary toilet installation by this invention was described, this invention is not limited to said embodiment, In the range which does not deviate from the meaning, it can change suitably.

For example, in this embodiment, the outflow pipe 9 is connected to the bottom side of the side wall 7 of the manhole 6, but is not limited to this position, and is a position raised from the bottom of the manhole 6. It doesn't matter.
Further, the outflow pipe 9 need not face the drain pipe 4 as well. For example, when the concave groove 18 is provided, the outflow pipe 9 and the concave groove 18 need to be continuously connected, but the drain pipe 4 is located above the bottom of the manhole 6. It does not have to be continuous with the groove 18.

  Further, as shown in FIG. 6, the overflow pipe 20 (see FIG. 4) can be replaced with an overflow pipe 24 formed of an inverted L-shaped pipe. In the inverted L-shaped overflow pipe 24, an L-shaped laterally long portion 24 a is disposed on the upper side, and an opening 24 c at one end thereof is disposed in the manhole 6. The vertically long portion 24 b of the overflow pipe 24 is disposed so as to extend downward from the other end portion of the horizontally long portion 24 a, and the lower end portion of the vertically long portion 24 b is connected to the outflow pipe 9 outside the manhole 6. The lower end portion of the vertically long portion 24 b may be connected to the outflow pipe 9 in the manhole 6.

  Moreover, in this embodiment, although the one end part 4a of the drainage pipe 4 is the state opened to the manhole 6, it is not limited to this, The one end part 4a of the drainage pipe 4 is also a valve (2nd valve body). ) May be provided so as to be openable and closable. By closing the second valve body, it becomes possible to temporarily stop the inflow from the drain pipe 4 into the manhole 6, so that the inside of the manhole 6 can be maintained without any storage or fluid. it can.

  In addition, it is possible to appropriately replace the components in the above-described embodiments with known components without departing from the spirit of the present invention.

4 Drainage pipe 5 Vertical pipe 6 Manhole 7 Side wall 8 Sewage pipe 9 Outflow pipe 9a Opening 10 Valve device 10a Valve body 15 Bottom of manhole 18 Groove 20, 24 Overflow pipe 25 Reservoir

Claims (2)

A drain pipe buried in the ground along the lateral direction;
A plurality of vertical pipes connected to the drain pipe at intervals along the longitudinal direction and extending in the vertical direction;
A manhole to which one end of the drain pipe is connected;
An outflow pipe connected to the side wall of the manhole and connecting the manhole and an existing sewer pipe;
A valve device for opening and closing the opening of the outflow pipe in the manhole;
Comprising
The outflow pipe is provided on the bottom side of the side wall of the manhole;
The valve body of the valve device is movable in the vertical direction, and a concave groove for fitting the lower end portion of the valve body in the valve device is provided at the bottom of the manhole,
Temporary toilet installation piping characterized in that the concave groove extends from one end of the drain pipe toward the opening of the outflow pipe, and forms a guide path for guiding drainage in the drain pipe to the outflow pipe. unit. The end of the drain pipe does not protrude into the manhole,
2. The temporary toilet installation piping unit according to claim 1 , wherein an end portion of the outflow pipe projects toward the concave groove at a bottom portion of the manhole.

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