JP2016130450A - Manhole for temporary toilet, and piping equipment for temporary toilet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable reduction mainly of an installation space for a manhole body.SOLUTION: The present invention relates to a manhole for a temporary toilet that includes a manhole body 25 to be buried underground, a sewage inflow pipe 26 pierced through a side surface of the manhole body 25, a sewage outflow pipe 27 provided on the manhole body 25, and a water sealing valve 29 fitted on an inner edge part of the sewage inflow pipe 26 for sealing sewage 28. The manhole body 25 has a lower part of an elliptical form and an upper part of a circular form, when seen in a planar view, and an intermediate part formed to have a part 25d with a reduced diameter when seen from sideways, the part with the reduced diameter being located on a side in a longer-diameter direction of the elliptically formed lower part. The sewage inflow pipe 26 is disposed on a side in a longer-diameter direction of the lower part of the manhole body 25, on the side having the part 25d with the reduced diameter.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a temporary toilet manhole and a temporary toilet piping facility that can achieve both a reduction in the size of the facility and an increase in the number of toilets installed.

  For example, in the event of a natural disaster such as a large-scale earthquake, evacuation shelters or temporary housing will be installed. Temporary toilets will be installed in such evacuation shelters and temporary housing. Is required.

  In addition to natural disasters, temporary toilets are provided temporarily when large-scale events are held.

  And in order to be able to install such a temporary toilet immediately, a temporary toilet piping facility is buried in advance in a designated evacuation site, a wide area square, or the surrounding land. (For example, refer to Patent Document 1).

  As shown in FIG. 8, the temporary toilet piping facility 1 includes a sewage tank such as a temporary toilet manhole 2 buried in the ground, a drain pipe 3 connected to the temporary toilet manhole 2, and the drainage. And a vertical tube 4 extending from the side surface of the tube 3 toward the ground.

  The temporary toilet manhole 2 includes a manhole body 5 that can be buried in the ground, a sewage inflow pipe 6 penetrating through the side surface of the manhole body 5, and a sewage outflow pipe 7 provided in the manhole body 5. I have. A sealing valve 9 capable of sealing the sewage 8 is attached to the inner end of the sewage inflow pipe 6 described above. When the sewage 8 accumulated in the sewage inflow pipe 6 and the drainage pipe 3 exceeds a predetermined level, the sewage 8 (the liquid content) of the excess is overflowed into the manhole body 5. An overflow port 9a is provided for this purpose (not shown correctly).

  The drainage pipe 3 described above is buried in the ground and has a required drainage gradient and extends in the lateral direction. The lower end of the drain pipe 3 is connected to the outer end of the sewage inflow pipe 6 described above.

  Moreover, the above-mentioned vertical pipe 4 has the connection port part 11 which can connect the toilet bowl of a temporary toilet to the upper end part installed so that it might reach the ground. The lower end portion of the vertical pipe 4 is connected to the upper side surface of the drain pipe 3 described above. A plurality of the vertical pipes 4 are provided at intervals along the axial direction of the drain pipe 3.

  According to such a configuration, by burying the temporary toilet piping facility 1 including the temporary toilet manhole 2 in the ground in advance, a plurality of vertical pipes installed so as to reach the ground in an emergency or the like. A full-fledged and sanitary temporary toilet in a short period of time by connecting toilets to the connection ports 11 at the upper end of the tube 4 and providing appropriate partitions, enclosures, buildings, etc. so as to cover these toilets. Can be built easily.

  The sewage 8 generated in the temporary toilet passes through the vertical pipe 4, the drainage pipe 3, and the sewage inflow pipe 6 in order, and is sent to the manhole main body 5, and further from the manhole main body 5 through the sewage outflow pipe 7 to the outside. To the sewage treatment facility.

  At this time, by closing the sealing valve 9 attached to the inner end of the sewage inflow pipe 6, the sewage 8 is once sealed and stored in the drain pipe 3 and the sewage inflow pipe 6. Is possible.

  Then, for example, by opening the sealing valve 9 at regular intervals, the sewage 8 stored in the drainage pipe 3 and the sewage inflow pipe 6 is discharged from the manhole body 5 and the sewage outflow pipe 7 at once by the water pressure of the sewage 8. It can be sent to an external sewage treatment facility.

  In addition, when the amount of sewage 8 stored in the drain pipe 3 and the sewage inflow pipe 6 exceeds a certain amount, the sewage 8 (liquid state of the sewage 8 (from the overflow port 9a provided in the seal valve 9) into the manhole body 5 is obtained. Overflow) prevents the sewage 8 from overflowing. Alternatively, the sewage 8 stored inside the drainage pipe 3 and the sewage inflow pipe 6 can be kept below a certain amount by the overflow port 9a.

JP-A-11-107362

  However, since the temporary toilet piping facility described in Patent Document 1 has a substantially uniform cross-section in the vertical direction, a large space is required for installing the manhole body.

In order to solve the above problems, the present invention provides:
A manhole body that can be buried underground,
A sewage inflow pipe disposed through the side surface of the manhole body;
A sewage outflow pipe provided in the manhole body,
In the manhole for a temporary toilet in which a sealing valve capable of sealing sewage is attached to the inner end of the sewage inflow pipe,
The manhole body is
The lower part has an oval shape in plan view,
The upper part is circular in plan view,
The intermediate portion has a side-view reduced diameter shape having a reduced diameter portion on one side in the major diameter direction of the lower part of the oval shape,
The sewage inflow pipe is provided on one side of the lower-diameter direction of the lower part of the manhole body, on the side where the reduced diameter part is provided.

  According to the present invention, the lower part of the manhole body has an oval shape in plan view, the upper part has a circular shape in plan view, and the middle part has a major axis direction of the lower part of the oval shape. The sewage inflow pipe is one side portion in the major axis direction of the lower portion of the manhole body, and the reduced diameter portion is provided. By being provided on the side, the manhole body can be reduced in size while securing a work space for maintenance, and the installation space for the manhole body can be reduced.

It is a side view of piping equipment for temporary toilets concerning the example of the present invention. It is sectional drawing which looked at the manhole for temporary toilets of FIG. 1 from the side. It is sectional drawing which looked at the manhole for temporary toilets of FIG. 2 from the other side (downstream side). It is sectional drawing which looked at the manhole for temporary toilets of FIG. 2 from upper direction. It is sectional drawing which looked at the manhole for temporary toilets provided with the height adjustment mechanism (extension state) in the overflow pipe from the one side (upstream side). It is sectional drawing which looked at the manhole for temporary toilets provided with the height adjustment mechanism (reduced state) in the overflow pipe from the one side (upstream side). It is a side view of the piping installation for temporary toilets concerning the modification of this invention. It is a side view of the piping installation for temporary toilets concerning a prior art example.

  Hereinafter, examples embodying the present embodiment will be described in detail with reference to the drawings.

  1 to 7 show this embodiment and its modifications.

  Here, FIG. 1 is an overall view, FIGS. 2 to 4 are partial sectional views, FIGS. 5 and 6 are explanatory views of a height adjusting mechanism, and FIG. 7 is an overall view similar to FIG. .

  For example, in the event of a natural disaster such as a large-scale earthquake, evacuation shelters or temporary housing will be installed. Temporary toilets will be installed in such evacuation shelters and temporary housing. Is required.

  In addition to natural disasters, temporary toilets are provided temporarily when large-scale events are held.

  And in order to be able to install such a temporary toilet immediately, the temporary toilet piping facilities should be buried in the designated evacuation area, the wide area square, and the surrounding land. Is done.

  <Configuration> The configuration will be described below.

  As shown in FIG. 1, the above-described temporary toilet piping facility 21 includes a sewage basin (or a sewage reservoir) such as a temporary toilet manhole 22 buried in the ground, and a drain connected to the temporary toilet manhole 22. A pipe 23 (or drainage collecting pipe) and a vertical pipe 24 (or individual drainage pipe) extending from the side surface of the drainage pipe 23 toward the ground are provided.

  As shown in the overall view of FIG. 1 and the three views of FIGS. 2 to 4, the above-described temporary toilet manhole 22 has a manhole body 25 that can be embedded in the ground, and a side surface of the manhole body 25. A sewage inflow pipe 26 penetrating and a sewage outflow pipe 27 provided in the manhole body 25 are provided. A seal valve 29 that can seal the sewage 28 is attached to the inner end of the sewage inflow pipe 26 described above.

  Here, to supplement the above, first, the manhole 22 for the temporary toilet described above is in the vicinity of a position serving as a water source such as a pool or a reservoir so that water for drainage can be easily secured in an emergency or the like. Is preferably provided.

  The manhole body 25 has a cylindrical shape extending substantially in the vertical direction. The manhole body 25 can be made of concrete, but in this case, it is made of resin. The manhole body 25 can be integrated, but can be a combination of two or more divided blocks.

  In this case, as shown in FIG. 2, two upper blocks 25a and two lower blocks 25b are combined in the vertical direction. The upper block 25a and the lower block 25b are fastened and fixed integrally in the vertical direction by fastening members 25c such as bolts and nuts. In this case, as shown in FIG. 4, the lower block 25b has a substantially oval shape in plan view, and the upper block 25a is not particularly clearly illustrated, but as shown in FIG. It has a substantially oval shape in a plan view, and a substantially circular shape in an upper end portion in a plan view, and has a reduced shape in a side view reduced in diameter as it goes upward. In this case, a reduced diameter portion 25d is formed on one side in the major axis direction. The upper end of the lower block 25b and the lower end of the upper block 25a are sized to match each other. A seal member 25e is interposed between the upper end of the lower block 25b and the lower end of the upper block 25a.

  A lid member 25f (manhole lid) is attached to the opening at the upper end of the manhole body 25 so as to be openable and closable. The lid member 25f is made of, for example, metal or resin. The lid member 25f has a substantially disk shape that can be fitted and disposed on the upper end of the manhole body 25 (a lid receiving portion provided on the manhole body 25). The lid member 25f is installed substantially flush with the ground surface.

  A bottom plate member 25 g is attached to the opening at the lower end of the manhole body 25. The bottom plate member 25g is made of, for example, concrete or resin. The bottom plate member 25g has a substantially oval shape in plan view that is slightly larger than the lower end of the manhole body 25, and is configured to close the opening at the lower end of the manhole body 25. The bottom plate member 25g is fastened and fixed integrally to the manhole body 25 in the vertical direction by fastening members 25h such as bolts and nuts.

  In addition, the inner bottom portion of the manhole body 25 is provided with a carot portion 30 that constitutes the bottom surface of the sewage tank. As shown in FIG. 3, the carot portion 30 includes a groove portion 30 a and inclined surface portions 30 b provided on both sides of the groove portion 30 a. As shown in FIG. 2, the recessed groove portion 30 a has a substantially semicircular shape extending along the long diameter of the manhole body 25. As will be described later, the concave groove portion 30a is provided with a drainage gradient that slopes downward from the sewage inflow pipe 26 side toward the sewage outflow pipe 27 side. Further, as shown in FIG. 3, the inclined surface portion 30b is an inclined surface having a downward gradient toward the concave groove portion 30a. The carot portion 30 is made of concrete or resin. The carot portion 30 is provided integrally with or separately from the above-described bottom plate member 25g. In addition, about the structure of the carote part 30, it does not restrict to this.

  The sewage inflow pipe 26 has an inner insertion portion 26 a located inside the manhole body 25 and an outer protruding portion 26 b located outside the manhole body 25. The inner end portion of the sewage inflow pipe 26 is an inner end portion of the inner insertion portion 26a. The outer end portion of the sewage inflow pipe 26 is an outer end portion of the outer protruding portion 26b. In this case, the inner insertion portion 26a and the outer protruding portion 26b are configured using separate pipe joint members or the like, and are connected and fixed to each other around the penetrating portion with respect to the manhole body 25. Furthermore, the pipe joint member which comprises the outer side protrusion part 26b is comprised by connecting two pipe joint members. However, the inner insertion portion 26a and the outer protruding portion 26b can be configured by a single or two or more pipe joint members. Each part (the inner insertion part 26a and the outer protrusion part 26b) of the sewage inflow pipe 26 is made of resin.

  And the sewage inflow pipe | tube 26 is attached to the side surface of the lower block 25b of the manhole main body 25, as shown in FIG. The sewage inflow pipe 26 is installed on one side of the long diameter of the lower block 25b. The sewage inflow pipe 26 is installed in the upper half of the lower block 25b. The sewage inflow pipe 26 is preferably installed in the major axis direction. The sewage inflow pipe 26 is provided on the upper end side of the slope of the concave groove portion 30a so as to be disposed at the same height as the concave groove portion 30a or at a higher position.

  The sewage outflow pipe 27 is provided at a position lower than the sewage inflow pipe 26 or the sealing valve 29 on the side surface of the manhole body 25. The sewage outflow pipe 27 is attached so as to protrude outward from the side surface of the manhole body 25. The sewage outflow pipe 27 is made of resin. The sewage outflow pipe 27 is installed on the other side of the long diameter of the lower block 25b. The sewage outflow pipe 27 is preferably installed in the major axis direction. The sewage outflow pipe 27 is provided at substantially the same height as the concave groove portion 30a on the lower end side of the gradient of the concave groove portion 30a.

  As shown in FIG. 4, the sealing valve 29 is installed in the vicinity of an intermediate position in the major axis direction of the lower block 25 b. As shown in FIG. 3, the sealing valve 29 is attached to the inner end portion of the sewage inflow pipe 26 so as to cover the entire inner end portion, and is moved up and down along the guide 29a. The gate valve includes a gate 29b that can open and close the inner end, and an operation handle 29c that raises and lowers the gate 29b manually.

  The guide 29a is obtained by integrally fastening and fixing two frame bodies with fastening members such as bolts and nuts with a seal member such as rubber interposed therebetween. The seal member has a thickness substantially equal to that of the gate 29b.

  The gate 29b is disposed so as to be movable up and down between the two frames. The lower end portion and both side portions of the gate 29b are sealed by the sealing member described above.

  The operation handle 29c is attached to the gate 29b.

  The guide 29a and the gate 29b have a size and a shape structure that can fully open and close at least the inner end of the sewage inflow pipe 26. The gate 29b may be electrically opened or closed instead of manually or in addition to manual operation.

  Returning to the description of the temporary toilet piping facility 21 again, as shown in FIG. 1, the drainage pipe 23 described above is embedded in the ground and has a required drainage gradient and extends in the lateral direction. Has been. The lower end of the drain pipe 23 is connected to the outer end of the sewage inflow pipe 26 described above. Further, the upper end portion of the drain pipe 23 is closed by a closing plate 23a or the like. A water tank or the like can be connected to the upper end portion of the drain pipe 23 or the vicinity thereof. In addition, the cross section of the drain pipe 23 can be circular or rectangular, or can be non-circular such as an oval, an ellipse, or an egg shape.

  In addition, the drain pipe 23 can be constituted by a pipe member such as a single long pipe, or can be constituted by connecting pipe members such as a plurality of short pipes or medium pipes. These long tubes, short tubes, and medium tubes can be combined. Here, the long tube has a length to which all the vertical tubes 24 can be attached. The short tube has a length to which only one vertical tube 24 can be attached. The medium-sized tube has such a length that several vertical tubes 24 can be attached simultaneously. In this case, the drainage pipe 23 has a plurality of lengths (two in FIG. 1, two lengths) to which several vertical pipes 24 (three, but not limited to this) can be attached, In the modified example of FIG. 7, there are three, but this is not a limitation.

  In the drain pipe 23, there is a fixed joint between the connection part 23b between the short pipes, the connection part 23b between the medium pipes, or the connection part 23b between any two of the long pipe, the short pipe and the medium pipe. However, it is preferable to use a variable joint that can absorb the influence by being deformed by a vibration such as an earthquake. The variable joint is, for example, a rubber seal ring (displacement allowing member) or the like interposed so as to be able to follow a displacement in the tube axis direction or a displacement in the tube diameter direction. .

  Moreover, the above-described vertical tube 24 extends substantially in the vertical direction toward the ground. The vertical pipe 24 has a connection port portion 24a to which a toilet of a temporary toilet can be connected at an upper end portion installed so as to reach the ground. The lower end portion of the vertical pipe 24 is connected to the upper side surface of the drain pipe 23 described above. A plurality of the vertical pipes 24 are provided at intervals along the axial direction of the drain pipe 23.

  The vertical pipe 24 can be constituted by a single long pipe, as in the case of the drain pipe 23 described above, or can be constituted by connecting a plurality of short pipes. A short tube or the like can be combined. Or it can also be comprised by the expansion-contraction pipe | tube which was able to change length according to the distance from the drain pipe 23 to the ground. In this case, it is constituted by an extendable tube. This telescopic tube has a double tube structure in which an inner tube and an outer tube are fitted so as to be freely stretchable.

  A fixed joint can be used for the connection part between the short pipes or the connection part between the long pipe and the short pipe in the vertical pipe 24, but preferably it is deformed against shaking such as an earthquake. Thus, a variable joint that can absorb the influence can be used. The variable joint is, for example, a rubber seal ring (displacement allowing member) or the like interposed so as to be able to follow a positional deviation in the pipe axis direction or a positional deviation in the pipe radial direction. Further, a rubber seal material or the like is also interposed in the expansion / contraction portion of the expansion / contraction tube.

  Then, at least one of a lid, a seal member, an opening / closing valve, a joint for connecting to a toilet of a temporary toilet, and the like is attached to the opening at the upper end of the vertical tube 24 as necessary.

  A cover member 24 b (or a protective cover) that covers the periphery of the upper end of the vertical tube 24 is attached to the upper end of the vertical tube 24. The cover member 24b can be integrated with the upper end of the vertical tube 24, or can be separate.

  The cover member 24b includes, for example, a box-shaped cover main body and a lid member attached to the opening provided on the upper surface of the cover main body so as to be openable and closable. On the side surface of the cover main body, a locking flange portion for holding the cover main body in a state of being embedded in the ground can be formed so as to project in the lateral direction or the like. The locking flange portion is provided for the entire circumference of the cover body or a part of the circumferential direction. The lid member is installed substantially flush with the ground surface. The cover member 24b can be made of metal or resin.

  And, in the connecting portion 24c between the lower end portion of the vertical pipe 24 and the upper side surface of the drain pipe 23, a variable joint that can absorb the influence by tilting against shaking such as an earthquake is provided. Can be used. This variable joint can be a spherical joint, for example. The spherical joint is attached to the outer surface of the drain pipe 23 via a cylindrical surface (or curved surface) saddle member, for example. The saddle member is abutted and disposed so as to cover an opening formed in the drain pipe 23 (upper side surface), and is fixed by adhesion. However, the configuration of the saddle member and the attachment means are not limited to this.

  In addition, a water tank or the like for supplying water is connected to the toilet connected to the upper end portion (connecting port portion 24a) of the vertical tube 24.

  In addition to the basic configuration as described above, the present embodiment has the following configuration.

  (Configuration 1)

  As shown in FIGS. 2 to 4, an overflow pipe 31 capable of overflowing the sewage 28 is attached in the middle of the inner insertion portion 26 a of the sewage inflow pipe 26.

  Here, when supplementary explanation is given, the overflow pipe 31 overflows the sewage 28 sealed in the sewage inflow pipe 26 and the drain pipe 23 into the manhole body 25. The overflow pipe 31 includes, for example, a raised portion 31a extending upward from the upper side surface of the inner insertion portion 26a, an upper lateral extension portion 31b extending laterally from the upper end of the raised portion 31a, and a tip of the upper lateral extension portion 31b. And a lower lateral extension 31d extending in the lateral direction from the lower end of the lower part 31c. In this case, the upright portion 31a, the upper lateral extension portion 31b, the upright portion 31c, and the lower lateral extension portion 31d are each constituted by a resin pipe member, and between these pipe members, a resin elbow member ( Are connected in order by a bending member such as a 90-degree elbow.

  A cylindrical surface (or a curved surface) along the upper side surface of the inner insertion portion 26a is formed between the sewage inflow pipe 26 (upper side surface of the inner insertion portion 26a) and the overflow pipe 31 (lower end of the rising portion 31a). Are connected using a saddle member 31f having a shape. The saddle member 31f is abutted and disposed so as to cover the opening formed in the inner insertion portion 26a (upper side surface), and is fixed by adhesion. However, the configuration and attachment means of the saddle member 31f are not limited to this.

  At this time, the upper lateral extension 31b extends in the width direction of the seal valve 29 so as to protrude outward from the position of the side surface of the seal valve 29 (see FIG. 4). The portion 31 d is extended to the other side in the axial direction of the sewage inflow pipe 26 so as to be substantially the same as the seal valve 29 or the length exceeding the seal valve 29. In this case, the lower lateral extension 31 d is installed at a position slightly higher than the center position of the sewage inflow pipe 26. However, the height of the lower lateral extension portion 31d is not limited to this, and is arbitrarily set so as to be optimal within a range that is higher than the above-described carote portion 30 (the inclined surface portion 30b) and lower than the upper lateral extension portion 31b. Can be set to Further, a drainage gradient may be provided for the upper lateral extension 31b and the lower lateral extension 31d.

  The overflow pipe 31 can be constituted entirely or at least partially by a flexible pipe instead of the above or in addition to the above. In this case, it is preferable to provide a hanging tool, a support tool, or the like capable of hanging support, lifting support, and horizontal support inside the manhole body 25.

  (Configuration 2)

  If necessary, the above-described overflow pipe 31 is configured to be height adjustable.

  Here, if the supplementary explanation about the above is performed, the overflow pipe 31 has the height adjustment mechanism 32. The height adjusting mechanism 32 may be of a telescopic type as shown in FIGS. 5 and 6, or a stepped type that is not particularly shown.

  The telescopic height adjustment mechanism 32 includes, for example, a double tube structure in which an inner cylinder 32a and an outer cylinder 32b are fitted so as to be extendable and retractable, and the fitting depth between the inner cylinder 32a and the outer cylinder 32b is increased. By changing the length, the length can be adjusted. The inner cylinder 32a is slidably fitted to the outer cylinder 32b. The telescopic height adjusting mechanism 32 has a position fixing mechanism for fixing the fitting depth between the inner cylinder 32a and the outer cylinder 32b. The position fixing mechanism is formed at, for example, a male screw portion formed at the upper end portion of the outer cylinder 32b, a female screw portion rotatably fitted to the outer peripheral portion of the inner cylinder 32a, and a lower end portion of the inner cylinder 32a. The above-described female screw portion has a locking portion such as a flange that can lock and hold the female screw portion. However, the configuration of the telescopic height adjustment mechanism 32 is not limited to this.

  The joint type height adjustment mechanism 32 has, for example, a detachable joint portion between the divided upper tube and the lower tube, and the joint portion is used to connect the upper tube and the lower tube. An extension pipe member having an arbitrary length can be added between them. The joint portion described above has a male screw portion or a female screw portion on one of the lower end portion of the upper tube and the upper end portion of the lower tube, and has a female screw portion or a male screw portion on the other side. However, the configuration of the joint type height adjustment mechanism 32 is not limited to this.

  The height adjusting mechanism 32 is provided with a seal member for ensuring airtightness and watertightness as necessary.

  The height adjusting mechanism 32 described above is provided at least on the rising portion 31a. In addition, the height adjusting mechanism 32 can also be provided in the standing portion 31c so that the height of the lower lateral extension portion 31d can be adjusted.

  As the height adjusting mechanism 32 is provided in the overflow pipe 31, as shown in FIG. 7, the drain pipe 23 can be extended to be longer. Further, the height of the manhole body 25 can be increased by interposing an intermediate block 25i between the upper block 25a and the lower block 25b of the manhole body 25.

  (Configuration 3)

  As shown in FIG. 1, the drain pipe 23 is connected to the outer end of the sewage inflow pipe 26 in the temporary toilet manhole 22 as described above. And this drain pipe 23 shall have the large diameter part 23c whose diameter is larger than an above-mentioned outer side edge part, and the diameter change part 23d which can connect this large diameter part 23c and an outer side edge part.

  Here, if the supplementary explanation about the above is performed, in short, at least a part of the drain pipe 23 can be made larger in diameter than the sewage inflow pipe 26. Here, the drain pipe 23 includes pipe members such as the above-described long pipe, short pipe, and medium pipe, and joint members such as the connection portion 23b.

  The large-diameter portion 23c preferably has a smaller diameter than the conventional drain pipe 3 (see FIG. 8). However, if necessary, the diameter of the drainage pipe 3 can be the same as or larger than that of the conventional drainage pipe 3.

  The diameter changing portion 23d is a diameter-enlarged portion that expands the upstream side for the sewage inflow pipe 26, and a diameter-reduced portion that reduces the downstream side for the drain pipe 23. The lower diameter portion of the diameter changing portion 23d has the same cross-sectional shape as the drainage pipe 23 and the sewage inflow pipe 26, and is continuous with these in a flush state. The diameter changing portion 23d has an upper half that is a shape change portion that smoothly connects the drain pipe 23 and the sewage inflow pipe 26.

  The installation position of the caliber changing portion 23d is arbitrary, but structurally, the connection portion 23b between the drain pipe 23 and the sewage inflow pipe 26 and its periphery, and the connection portion 23b between the pipe members constituting the drain pipe 23 or the vicinity thereof It is preferable to provide in. In this case, although it is interposed as a diameter changing member in the vicinity of the connecting portion 23b between the drain pipe 23 and the sewage inflow pipe 26, it can also be provided at the connecting portion 23b between the medium-sized pipes or in the vicinity thereof. .

  Further, the drain pipe 23 can be configured so that the diameter can be changed (expanded) in multiple stages using a plurality of diameter changing portions 23d.

  <Operation> The operation of this embodiment will be described below.

  By connecting underground toilet piping facilities 21 including temporary toilet manholes 22 in the ground in advance, connection ports at the upper ends of a plurality of vertical tubes 24 installed to reach the ground in an emergency or the like A full-scale and sanitary temporary toilet can be easily constructed in a short period of time by connecting a toilet bowl to each part 24a and providing a partition, enclosure, building, etc. as appropriate so as to cover these toilet bowls. .

  Then, the sewage 28 generated in the temporary toilet passes through the vertical pipe 24, the drainage pipe 23, and the sewage inflow pipe 26 in order, and is sent to the manhole body 25, and further from the manhole body 25 through the sewage outflow pipe 27 to the outside. To the sewage treatment facility.

  At this time, it is possible to store a predetermined amount of sewage 28 in the sewage inflow pipe 26 by closing the sealing valve 29 attached to the inner end of the sewage inflow pipe 26. As a result, the portion upstream of the sewage inflow pipe 26 can be used as a sewage reservoir, and the manhole body 25 can be reduced in size accordingly.

  Then, by attaching the overflow pipe 31 in the middle of the inner insertion portion 26a of the sewage inflow pipe 26, when the sewage 28 accumulated inside the sewage inflow pipe 26 exceeds a predetermined level, the excess sewage 28 (of the The liquid component) can overflow into the manhole body 25 and be discharged from the sewage outflow pipe 27. Thereby, it is possible to prevent the sewage 28 from overflowing to the upstream side of the sewage inflow pipe 26.

  Then, when the inside of the sewage inflow pipe 26 becomes full, the sewage inflow pipe is opened by opening the sealing valve 29 at regular intervals (for example, about once or twice a day). The sewage 28 (including solids and liquids) stored in the interior 26 is made to flow at once to the manhole body 25 using the water pressure of the sewage 28, and external sewage is discharged from the manhole body 25 through the sewage outflow pipe 27. Can be sent to processing facility. As a result, the manhole body 25 can be miniaturized and the structure can be simplified while securing the necessary amount of stored sewage 28. In addition, since the sewage 28 is sent from the manhole body 25 to an external sewage treatment facility, the amount of water flowing separately from the sewage 28 can be reduced.

  The amount of sewage 28 stored in the sewage inflow pipe 26 or in the drain pipe 23 upstream of the sewage inflow pipe 26 is such that the sewage 28 does not overflow excessively until the seal valve 29 is opened. It is preferable to set such that the minimum water pressure necessary for draining the sewage 28 is ensured when opening.

  Moreover, the sealing valve 29 can be easily installed inside the manhole body 25 by attaching the sealing valve 29 to the inner end of the sewage inflow pipe 26.

  Further, the sewage outflow pipe 27 can be attached at a position lower than the sealing valve 29 on the side surface of the manhole body 25. Thereby, for example, when the discharge port of the sewage 28 is provided on the bottom surface of the manhole body 25, the discharge path for the sewage 28 must be installed below the manhole body 25, whereas the manhole body 25 It is possible to install the drainage path of the sewage 28 at approximately the same depth as that, and accordingly, the excavation depth of the ground for burying the drainage path of the sewage 28 in the ground can be reduced. The construction can be facilitated.

  <Effect> According to this embodiment, the following effects can be obtained.

  (Effect 1)

  According to Configuration 1 described above, the following operational effects can be obtained.

  That is, since the overflow pipe 31 is attached in the middle of the inner insertion portion 26a of the sewage inflow pipe 26, it is not necessary to provide the overflow function to the seal valve 29. Therefore, the seal valve 29 is reduced by that much. Can do. Thus, the manhole body 25 can be further reduced in size. This reduces the equipment cost of the temporary toilet manhole 22 and the temporary toilet piping facility 21 and reduces the installation space, thereby facilitating the construction such as embedding in the ground, shortening the construction period, It becomes possible to promote the use of the toilet piping facility 21.

  In addition, by eliminating the overflow function from the sealing valve 29, it becomes possible to store the sewage 28 in a full state inside the sewage inflow pipe 26, so that the inside of the sewage inflow pipe 26 and the drain pipe on the upstream side thereof. It becomes possible to increase the quantity of the sewage 28 which can be stored in 23. Therefore, the diameter of the upstream side of the sewage inflow pipe 26 can be reduced, or the drainage gradient can be reduced, and therefore the length of the upstream side of the sewage inflow pipe 26 can be lengthened. It is possible to increase the number of installed units.

  Furthermore, structurally, the sewage inflow pipe 26, the sealing valve 29, and the overflow pipe 31 are previously attached to the manhole body 25 (in this case, the lower block 25b) to form an integrated assembly part. Therefore, it is possible to eliminate troublesome operations such as carrying in and installing the individual parts of the sewage inflow pipe 26, the sealing valve 29 and the overflow pipe 31 in the manhole body 25 at the site, and the workability is remarkably improved. Can be improved.

  (Effect 2)

  According to Configuration 2 described above, the following operational effects can be obtained.

  That is, by making the height of the overflow pipe 31 adjustable, the amount of sewage 28 that can be stored upstream of the sewage inflow pipe 26 can be adjusted.

  For example, when it is desired to increase the amount of sewage 28 that can be stored or to increase the water pressure of the stored sewage 28, the overflow pipe 31 can be set higher. On the other hand, when it is desired to reduce the amount of sewage 28 that can be stored or to reduce the water pressure of the stored sewage 28, the overflow pipe 31 can be set lower.

  In addition, the height of the overflow pipe 31 can be set and adjusted according to the upstream configuration of the sewage inflow pipe 26.

  For example, when the upstream configuration of the sewage inflow pipe 26 is large (for example, the drain pipe 23 is lengthened), the height of the overflow pipe 31 can be set high. On the contrary, when the upstream structure of the sewage inflow pipe 26 is small (for example, the drain pipe 23 is shortened), the height of the overflow pipe 31 can be set low.

  (Effect 3)

  According to the above-described configuration 3, the following operational effects can be obtained.

  That is, the drain pipe 23 connected to the sewage inflow pipe 26 of the manhole body 25 has a large diameter portion 23c having a larger diameter than the outer end of the sewage inflow pipe 26, so that the sewage inflow pipe 26 and the drain pipe 23 It is possible to increase the amount of sewage 28 that can be stored inside. Therefore, the manhole body 25 can be further reduced in size accordingly.

  Further, by providing the diameter changing portion 23d between the large diameter portion 23c and the outer end portion of the sewage inflow pipe 26, it is possible to connect the large diameter portion 23c and the sewage inflow pipe 26 having different diameters without any trouble. Become. In particular, by preparing a plurality of types of diameter changing portions 23d, it is possible to select and install an optimum one from the large diameter portions 23c of various diameters at the time of installation according to the situation at the site. Etc. are also possible.

  Although the embodiments of the present invention have been described in detail with reference to the drawings, the embodiments are only examples of the present invention, and the present invention is not limited to the configurations of the embodiments. Needless to say, design changes and the like within a range not departing from the gist of the invention are included in the present invention. Further, for example, when each embodiment includes a plurality of configurations, it is a matter of course that possible combinations of these configurations are included even if not specifically described. Further, when a plurality of embodiments and modifications are shown, it is needless to say that possible combinations of configurations extending over these are included even if not specifically described. Further, the configuration depicted in the drawings is of course included even if not particularly described. Further, when there is a term of “etc.”, it is used in the sense that the equivalent is included. In addition, when there are terms such as “almost”, “about”, “degree”, etc., they are used in the sense that they include those in the range and accuracy recognized by common sense.

22 Manhole for temporary toilet 23 Drain pipe 23c Large diameter part 23d Diameter changing part 25 Manhole body 25d Reduced diameter part 26 Sewage inflow pipe 26a Inner insertion part 27 Sewage outflow pipe 28 Sewage 29 Sealing valve 31 Overflow pipe

Claims (3)

A manhole body that can be buried underground,
A sewage inflow pipe disposed through the side surface of the manhole body;
A sewage outflow pipe provided in the manhole body,
In the manhole for a temporary toilet in which a sealing valve capable of sealing sewage is attached to the inner end of the sewage inflow pipe,
The manhole body is
The lower part has an oval shape in plan view,
The upper part is circular in plan view,
The intermediate portion has a side-view reduced diameter shape having a reduced diameter portion on one side in the major diameter direction of the lower part of the oval shape,
The mantle for a temporary toilet, wherein the sewage inflow pipe is provided on one side portion of the lower portion of the manhole body in the major axis direction and provided with the reduced diameter portion.   2. The manhole for a temporary toilet according to claim 1, wherein a carot portion having a concave groove portion and inclined surface portions provided on both sides of the concave groove portion is provided at a bottom portion of the manhole body. In the temporary toilet manhole according to claim 1 or 2, a drain pipe is connected to an outer end of the sewage inflow pipe.
The drain pipe has a larger diameter portion than the outer end portion,
A piping facility for a temporary toilet, comprising a diameter changing portion capable of connecting the large diameter portion and the outer end portion.