JP5599273B2 - Wastewater treatment equipment - Google Patents

Description

  The present invention relates to a wastewater treatment apparatus.

  Conventionally, wastewater treatment devices (also called septic tanks) for treating domestic wastewater and industrial wastewater have been used. Main bodies with manholes are often used to access the interior of wastewater treatment equipment for various purposes such as inspection, cleaning, inspection and the like. As a configuration of a wastewater treatment apparatus having a manhole, a configuration in which a manhole frame that supports a manhole cover is mounted on a main body having a manhole is known. In addition, as a configuration used when the main body of the wastewater treatment apparatus is buried deep in the ground, a configuration in which a raising member is interposed between a main body having a manhole and a manhole frame provided on the ground surface is known. Yes.

JP 9-316902 A JP-A-10-258895 JP 2005-87968 A

  However, the actual situation is that no sufficient device has been devised for the simplification of the configuration for using the manhole. For example, when the raising member is used, there is a possibility that a large gap into which rainwater or earth and sand can enter is generated between the lower end of the raising member and the main body. In this case, in order to prevent rainwater or earth and sand from entering the manhole from the gap, there is a case where a portion having a shape covering the main body of the wastewater treatment apparatus is required at the lower end of the raising member. Further, a frame for supporting the raising member may be separately required between the main body of the waste water treatment apparatus and the raising member.

  The main advantage of the present invention is to provide a technique capable of simplifying a configuration for using a manhole.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

[Application Example 1]
Wastewater treatment equipment,
A main body for accommodating a treatment tank for treating waste water;
A manhole forming portion provided in the main body and forming a manhole;
A manhole cover for closing the manhole;
A manhole frame that supports the manhole cover;
With
The manhole forming part is
A neck that is a hollow columnar part that protrudes upward and forms the manhole at the top;
An upper surface forming an upper surface surrounding the entire circumference of the lower end of the neck;
Including
The upper part of the neck part supports the manhole frame when the manhole frame is placed on the manhole forming part,
The upper surface portion has an annular shape when the hollow columnar raising member for supporting the manhole frame instead of the neck portion is placed on the manhole forming portion so as to surround the neck portion. Support the lower end of the entire circumference,
The manhole forming part is configured to restrain the movement of the raising member by contacting the inner surface of the raising member with respect to the horizontal movement of the raising member placed on the manhole forming part. The annular lower end of the raising member is configured to prevent the entire lower end from being separated from the upper surface portion,
When viewed from above, the direction from the center of gravity of the shape formed by the outline of the manhole toward the outside of the manhole is referred to as the outer circumferential direction, and the direction from the outside of the manhole toward the center of gravity is the inner circumferential direction. When calling
The manhole frame is formed between the first lower surface, the second lower surface formed on the outer circumferential direction side with respect to the first lower surface, the first lower surface and the second lower surface, and the first lower surface and A first leg projecting downward from the second lower surface,
The manhole frame, the neck, and the raising member are
(A) When the manhole frame is placed on the manhole forming portion, the first lower surface is the upper portion of the neck portion in a state where the first leg portion is disposed on the outer peripheral direction side of the neck portion. The first leg is in contact with the neck and restrains the horizontal movement of the manhole frame,
(B) When the manhole frame is placed on the raising member, the second lower surface is an upper end of the raising member in a state where the raising member is disposed on the outer peripheral direction side of the first leg portion. And the first leg is configured to stop the movement of the manhole frame in a horizontal direction by contacting the raising member.
Wastewater treatment equipment.

  According to this configuration, the manhole forming portion is configured to prevent the annular lower end of the raising member from separating from the upper surface portion over the entire circumference of the lower end due to contact between the neck portion and the inner surface of the raising member. Therefore, it is possible to reduce the possibility that a gap is generated between the lower end of the raising member and the upper surface portion, and earth and sand or rainwater enters the manhole from the gap. As a result, it is not necessary to use a specially shaped raising member (for example, a raising member having a complicated shape that matches the shape of the manhole forming portion).

  When the manhole frame is placed on the manhole forming portion, the first lower surface is supported on the upper portion of the neck portion with the first leg portion disposed on the outer peripheral direction side of the neck portion, and the first leg portion is The horizontal movement of the manhole frame is stopped by contacting the neck. As a result, the displacement of the manhole frame with respect to the neck is suppressed.

  Further, when the manhole frame is placed on the raising member, the second lower surface is supported on the upper end of the raising member with the raising member disposed on the outer peripheral direction side of the first leg, and the first leg Comes into contact with the raising member and the movement of the manhole frame in the horizontal direction is stopped. As a result, displacement of the manhole frame with respect to the raising member is suppressed.

  In this manner, the same manhole frame can be used while suppressing positional deviation regardless of whether the raising member is used. Further, when the raising member is used, the raising member may be mounted (attached) directly on the manhole forming portion, so that it is not necessary to attach a frame for attaching the raising member to the manhole forming portion.

  As described above, the configuration for using the manhole can be simplified.

[Application Example 2]
The wastewater treatment apparatus according to Application Example 1,
The manhole cover includes a second leg protruding downward.
The manhole cover and the neck are
When the manhole cover is placed on the top of the neck without the manhole frame, the lower surface of the manhole cover is placed on the neck with the second leg disposed on the outer peripheral side of the neck. Supported by the upper part, the second leg is configured to stop the movement of the manhole cover in the horizontal direction by contacting the neck.
Wastewater treatment equipment.

  According to this configuration, when the manhole cover is placed on the manhole forming portion, the position of the manhole cover can be prevented from shifting. Such an effect can be realized with a simple configuration.

[Application Example 3]
The wastewater treatment apparatus according to Application Example 1 or Application Example 2,
The neck portion is configured such that the horizontal cross-sectional shape is circular and the outer diameter of the upper portion is smaller than the maximum outer diameter of the neck portion.
Wastewater treatment equipment.

  According to this configuration, the manhole frame can be placed (mounted) on the neck portion without providing a complicated shape that fits with the first leg portion of the manhole frame on the neck portion. Thus, the structure for using a manhole can be simplified.

[Application Example 4]
The wastewater treatment apparatus according to any one of Application Example 1 to Application Example 3,
The neck has a hole penetrating from the inner circumferential side to the outer circumferential side,
The hole is formed at a position higher than a lower end of the first leg portion of the manhole frame when the manhole frame is placed on the manhole forming portion.
Wastewater treatment equipment.

  According to this configuration, it is possible to temporarily fix at least one of the manhole frame and the manhole cover to the manhole forming portion using the hole. For example, a binding wire such as a so-called PP (polypropylene) band can be passed through the hole, and at least one of the manhole frame and the manhole cover can be temporarily fixed using the binding wire. Moreover, since this hole is arrange | positioned in the position higher than the lower end of a 1st leg part, even when it is a case where a hole is not utilized for fixation of a manhole frame, a hole can be covered with a 1st leg part. . When the raising member is used, the hole can be covered with the raising member. As described above, it is possible to reduce the possibility that earth or sand or rainwater enters the inside of the waste water treatment apparatus from the hole. Such an effect can be realized with a simple configuration.

[Application Example 5]
The wastewater treatment apparatus according to Application Example 4,
The first leg portion of the manhole frame has a hole penetrating from the inner circumferential direction side to the outer circumferential direction side,
The hole of the first leg portion is formed at a height that can overlap the hole of the neck portion when the manhole frame is placed on the manhole forming portion.
Wastewater treatment equipment.

  According to this structure, a manhole frame can be fixed to a manhole formation part using the hole of a neck part, and the hole of a 1st leg part. For example, the manhole frame can be fixed to the manhole forming portion by using a penetrating member (for example, a rivet) that passes through the holes. Such an effect can be realized with a simple configuration.

[Application Example 6]
The wastewater treatment apparatus according to Application Example 4 or Application Example 5,
The size (diameter) of the hole in the neck varies depending on the direction (non-circular),
The minimum size of the hole in the neck is the first size;
The size of at least one direction of the hole of the neck is a second size larger than the first size.
Wastewater treatment equipment.

  According to this configuration, a circular member having a cross section of the first size can be passed through the hole in the neck, and a circular member having a cross section having a size larger than the first size can be prevented from passing through. Therefore, the manhole frame or the raising member can be fixed to the manhole forming portion by using a fixing member (for example, a rivet or a screw) including the first size penetrating portion. In addition, a member having a wide cross-sectional shape having a thickness of the first size or less and a width of the second size or less can be passed through the hole in the neck portion. Therefore, at least one of the manhole cover and the manhole frame can be temporarily fixed to the manhole forming portion using such a member (for example, a binding wire such as a so-called PP band). Such an effect can be realized with a simple configuration.

  In addition, this invention can be implement | achieved with various forms, for example, can be implement | achieved with forms, such as a waste water treatment apparatus, the raising member for a waste water treatment apparatus, a manhole frame, a manhole cover.

It is a side view of a waste water treatment apparatus. It is sectional drawing which shows the mounting state of the manhole formation part 200, the manhole frame 300, and the manhole cover 100. FIG. It is a figure which expands and represents the part PA of FIG. It is sectional drawing which looked at the leg part 340 and the 3rd wall part 233 from the upper direction toward the downward direction. It is sectional drawing which shows the mounting state of the manhole formation part 200, the raising member 400, the manhole frame 300, and the manhole cover 100. FIG. It is a figure which expands and represents the part PB of FIG. It is sectional drawing which shows a mode that the manhole cover 100 was temporarily fixed to the manhole formation part 200. FIG. It is explanatory drawing which shows the shape of the through-hole 233h of the 3rd wall part 233 of the manhole formation part 200. FIG. It is sectional drawing which shows the mounting state of the manhole formation part 200, the raising member 400, the manhole frame 300, and the manhole cover 100. FIG. It is sectional drawing which shows another Example of a neck part. It is sectional drawing which shows another Example of a neck part. It is explanatory drawing which shows another Example of the leg part of a manhole frame.

  Next, embodiments of the present invention will be described based on first to third examples and modifications.

A. First embodiment:
FIG. 1 is a side view of a wastewater treatment apparatus as an embodiment of the present invention. This waste water treatment apparatus 800 has a main body 830 formed by joining an upper tank 810 and a lower tank 820 each formed in a tank shape. The upper tank 810 and the lower tank 820 are made of, for example, FRP (fiber reinforced plastic) or dicyclopentadiene resin.

  Although not shown, the main body 830 accommodates various treatment tanks for treating waste water. For example, the main body 830 includes a treatment tank (for example, a contaminant removal tank or a precipitation separation tank) that separates solid matter in waste water, and an anaerobic treatment tank (for example, an anaerobic filter bed tank) that performs anaerobic treatment with anaerobic microorganisms. ), An aerobic treatment tank (for example, a contact aeration tank) that performs aerobic treatment with aerobic microorganisms, a treatment water tank that temporarily stores treated water, and a disinfection tank that disinfects treated water. Contained. In addition, the processing tank accommodated in the main body 830 may be other various processing tanks different from the above-described processing tank. Also, the processing flow may be an arbitrary processing flow.

  The upper tank 810 is provided with an inflow pipe 801 that introduces wastewater into the main body 830 and a discharge pipe 802 that discharges treated water treated by the wastewater treatment apparatus 800 from the main body 830. In addition, a manhole forming unit 200 is provided on the upper surface of the upper tank 810. In the present embodiment, two manhole forming portions 200 are provided in the upper tank 810.

  The manhole forming part 200 is formed in a substantially circular shape in plan view (viewed from above to below), and forms a substantially circular manhole 200h. A manhole frame 300 is fixed to the upper part of the manhole forming unit 200. The manhole frame 300 is formed in a substantially circular frame shape in plan view, and supports the manhole cover 100. The manhole cover 100 is a disk-shaped cover that closes the manhole 200h.

  In the embodiment of FIG. 1, the waste water treatment apparatus 800 is placed on the base concrete C1 constructed in the ground. After the wastewater treatment device 800 is backfilled, the concrete slab C2 is placed on the top of the wastewater treatment device 800. In addition, the installation method of the waste water treatment apparatus 800 is not restricted to the method shown in FIG. 1, and may be various other methods. For example, as will be described later, a raising member may be used.

  First, the case where the manhole frame 300 is fixed to the manhole forming unit 200 without using the raising member will be described. FIG. 2 is a cross-sectional view showing a mounted state of the manhole forming unit 200, the manhole frame 300, and the manhole cover 100. FIG. 3 is an enlarged view of the portion PA in FIG. 2, and is an exploded cross-sectional view showing the assembly of the manhole forming part 200, the manhole frame 300, and the manhole cover 100. FIG. 4 is a cross-sectional view of the assembly of the manhole frame 300 and the manhole forming unit 200 as viewed from above downward. FIG. 4 shows an AA cross section of FIG.

  The manhole forming part 200 has a neck part 230 and an upper surface part 250. The upper surface portion 250 is a flat surface formed in a substantially circular shape in plan view, and is provided on the upper portion of the upper tank 810. From the inner peripheral edge 255 of the upper surface portion 250, the neck portion 230 protrudes upward. The neck portion 230 is a hollow columnar portion protruding upward, and forms a manhole 200h on the upper surface.

  In FIG. 4, the outline 200ho of the manhole 200h is indicated by a dotted line. As shown in the figure, the manhole 200h is a substantially circular hole. The position 200hc in the figure is the position of the center of gravity of the shape formed by the outline 200ho of the manhole 200h. A first direction D1 in the drawing indicates a direction from the outside of the manhole 200h toward the gravity center position 200hc, and a second direction D2 indicates a direction from the gravity center position 200hc toward the outside of the manhole 200h. Hereinafter, the first direction D1 is also referred to as “inner circumferential direction D1”, and the second direction D2 is also referred to as “outer circumferential direction D2”.

  As shown in FIG. 3, the neck portion 230 has a first wall portion 231, a second wall portion 232, a third wall portion 233, and a fourth wall portion 234. The first wall portion 231 extends upward from the inner peripheral edge 255 of the upper surface portion 250. The second wall part 232 is an inclined wall that inclines in the inner circumferential direction D1 and extends obliquely upward from the upper end of the first wall part 231. The third wall portion 233 extends upward from the upper end of the second wall portion 232. The third wall portion 233 is provided with a through hole 233h (details will be described later). The 4th wall part 234 is a wall extended from the upper end of the 3rd wall part 233, The extension direction is changing gradually from the upper direction to the inner peripheral direction D1. The fourth wall portion 234 corresponds to the upper end (upper surface) of the neck portion 230, and the inner end 234e of the fourth wall portion 234 forms the contour of the manhole 200h.

  The upper surface portion 250 forms an upper surface surrounding the entire periphery of the lower end of the neck portion 230 (the lower end of the first wall portion 231). The upper surface portion 250 is used to support a raising member described later.

  The neck portion 230 of the present embodiment has a step shape having a second wall portion 232 that is inclined. Accordingly, the outer diameter ED1 of the upper portion of the neck portion 230 (the upper end of the third wall portion 233 and the fourth wall portion 234) is smaller than the outer diameter ED2 of the lower end of the neck portion 230 (the lower end of the first wall portion 231). . The reason for this will be described later.

  The manhole frame 300 includes a frame main body 310, leg portions 340, an inner protruding portion 320, and an outer protruding portion 330. The frame main body 310 is a hollow disk formed in a substantially circular shape in plan view. The leg portion 340 is a protrusion that protrudes downward and is provided over the entire periphery of the frame body 310 at a position between the inner periphery and the outer periphery of the lower surface of the frame body 310. The lower surface of the frame main body 310 is divided by a leg portion 340 into a first lower surface 311 inside the leg portion 340 and a second lower surface 312 outside the leg portion 340. The leg portion 340 is provided with a through hole 340h. The through hole 340h is used for fixing the manhole frame 300 to the manhole forming portion 200 (details will be described later).

  In this embodiment, the manhole frame 300 is configured such that the inner diameter ID1 of the leg portion 340 is the same as or slightly larger than the outer diameter ED1 of the upper portion (upper end) of the neck portion 230. Therefore, when the manhole frame 300 is mounted (placed) on the manhole forming portion 200, the leg portion 340 surrounds the outer peripheral direction D2 side of the neck portion 230 (the third wall portion 233 and the fourth wall portion 234). Thus, the first lower surface 311 of the manhole frame 300 is supported by the fourth wall portion 234. In the present embodiment, since the inner diameter ID1 of the leg portion 340 is substantially the same as the outer diameter ED1 of the upper portion (upper end) of the neck portion 230, the manhole frame 300 fits snugly into the manhole forming portion 200. Thereby, the manhole frame 300 is positioned with respect to the manhole forming unit 200, and the manhole frame 300 is supported by the manhole forming unit 200.

  As shown in FIG. 4, in the present embodiment, the third wall portion 233 of the manhole forming portion 200 is provided with a plurality (four) of through holes 233h. Similarly, the leg portion 340 of the manhole frame 300 is also provided with a plurality of (specifically, four) through holes 340h. As shown in the drawing, the plurality of through holes 340h are arranged so as to overlap with the plurality of through holes 233h, respectively. In the present embodiment, the four through holes 233h and the four through holes 340h are arranged in four directions (isotropically), respectively. As shown in FIG. 2, the height of the through hole 340h is also set so that the through hole 340h overlaps the through hole 233h. Therefore, as shown in FIG. 2, the manhole frame 300 can be easily fixed to the manhole forming portion 200 by using the fixing member 500 that passes through the through hole 340h and the through hole 233h. The fixing member 500 may be a screw or a rivet, for example. Note that the total number of the through holes 233h and the through holes 340h is not limited to 4, and may be any number (for example, 1, 2, 3, or 5 or more).

  Note that at least one of the through hole 233h and the through hole 340h may not be provided in advance. In this case, when the manhole frame 300 is fixed to the manhole forming portion 200, a hole may be provided by a drill.

  As shown in FIGS. 2 and 3, an inner protrusion 320 and an outer protrusion 330 protrude upward from the upper surface of the frame body 310 of the manhole frame 300. The inner protrusion 320 is provided on the inner periphery of the frame body 310, and the outer protrusion 330 is provided on the outer periphery of the frame body 310. On the other hand, a leg 110 protruding downward is provided on the outer peripheral edge of the manhole cover 100. When the manhole cover 100 is mounted (placed) on the manhole frame 300, the leg portion 110 of the manhole cover 100 is formed in the recess 325 formed by the inner protrusion 320, the frame body 310, and the outer protrusion 330. Inserted. Thereby, the manhole cover 100 is positioned with respect to the manhole frame 300, and the manhole cover 100 is supported by the manhole frame 300.

  Next, the case where a raising member is used will be described. FIG. 5 is a cross-sectional view showing a mounted state of the manhole forming part 200, the raising member 400, the manhole frame 300, and the manhole cover 100. FIG. 6 is an enlarged view of the part PB of FIG. 5, and is an exploded cross-sectional view showing the assembly of the manhole forming part 200, the raising member 400, the manhole frame 300, and the manhole cover 100. As illustrated, a raising member 400 is disposed between the manhole forming portion 200 and the manhole frame 300.

  The configurations of the manhole forming unit 200, the manhole frame 300, and the manhole cover 100 are the same as those in the embodiment of FIGS. The raising member 400 is a cylindrical member having a substantially uniform outer diameter and inner diameter from the lower end to the upper end. Further, ribs 410 are formed on the raising member 400 in order to increase the strength. However, the rib 410 may be omitted.

  In the present embodiment, the inner diameter ID2 (the inner diameter of the portion without the rib 410) of the raising member 400 is the same as or slightly larger than the outer diameter ED2 of the first wall portion 231 of the manhole forming portion 200. Further, the raising member 400 is configured. Accordingly, when the raising member 400 is mounted (placed) on the manhole forming unit 200, the lower end of the raising member 400 is in a state where the raising member 400 surrounds the periphery (the outer peripheral direction D2 side) of the first wall portion 231. Supported by the upper surface portion 250. In this embodiment, since the inner diameter ID2 of the raising member 400 is substantially the same as the outer diameter ED2 of the first wall portion 231, the raising member 400 fits snugly into the manhole forming portion 200. Thereby, the raising member 400 is positioned with respect to the manhole forming part 200, and the raising member 400 is supported by the manhole forming part 200. In the present embodiment, the fixing member 500 that penetrates the raising member 400 and the first wall portion 231 fixes the raising member 400 to the manhole forming portion 200.

  In the present embodiment, the outer diameter ED4 of the raising member 400 is smaller than the diameter ED5 of the outer peripheral edge of the upper surface portion 250. Therefore, the upper surface portion 250 supports the annular lower end of the raising member 400 over the entire circumference. That is, a large gap is suppressed between the raising member 400 and the upper surface portion 250. As a result, water stoppage between the raising member 400 and the upper surface portion 250 can be easily performed. For example, the contact portion between the lower end of the raising member 400 and the upper surface portion 250 may be sealed with a sealing material (for example, a silicon-based sealing material) over the entire circumference.

  Moreover, as described above, the play in the horizontal position of the raising member 400 with respect to the manhole forming portion 200 is small. That is, with respect to the horizontal movement of the raising member 400, the manhole forming portion 200 (first wall portion 231) comes into contact with the inner surface of the raising member 400 and stops the movement of the raising member 400. Thereby, the lower end of the raising member 400 is prevented from separating from the upper surface portion 250. As a result, the possibility that a large gap is generated between the raising member 400 and the upper surface portion 250 can be reduced.

  A manhole frame 300 is mounted (placed) on the top of the raising member 400. In the present embodiment, the raising member 400 and the manhole frame 300 are configured such that the inner diameter ID2 of the raising member 400 is the same as or slightly larger than the outer diameter ED3 of the leg portion 340. Therefore, when the manhole frame 300 is mounted (placed) on the raising member 400, the second lower surface 312 of the manhole frame 300 is placed on the raising member while the outer peripheral direction D2 side of the leg 340 is surrounded by the raising member 400. It is supported at the upper end of 400. Thereby, the manhole frame 300 is positioned with respect to the raising member 400, and the manhole frame 300 is supported by the raising member 400.

  The mounting (mounting) of the manhole cover 100 on the manhole frame 300 is the same as the embodiment of FIGS.

  As described above, in this embodiment, regardless of whether the raising member 400 is used, the same manhole frame 300 can be used while suppressing misalignment. Further, when the raising member 400 is used, the raising member 400 may be directly mounted (placed) on the manhole forming unit 200, so that it is not necessary to separately prepare a frame for mounting the raising member 400. As described above, the configuration for using the manhole 200h can be simplified.

  Further, in this embodiment, the manhole cover 100 can be placed directly on the manhole forming part 200 and temporarily fixed. FIG. 7 is a cross-sectional view illustrating a state where the manhole cover 100 is temporarily fixed to the manhole forming unit 200. There are two differences from the state shown in FIG. The first difference is that the manhole frame 300 is omitted and the manhole cover 100 is placed directly on the manhole forming portion 200. The second difference is that the manhole cover 100 is temporarily fixed to the manhole forming part 200 by a binding line 600 passing through the through hole 233h.

  As shown in the drawing, the manhole cover 100 is configured such that the inner diameter ID3 of the leg portion 110 of the manhole cover 100 is the same as or slightly larger than the outer diameter ED1 of the upper portion (upper end) of the neck portion 230. ing. Therefore, when the manhole cover 100 is placed on the manhole forming part 200, the leg part 110 surrounds the outer peripheral direction D2 side of the neck part 230 (the fourth wall part 234 and the third wall part 233). The lower surface is supported by the fourth wall portion 234. Thereby, the manhole cover 100 is positioned with respect to the manhole forming part 200, and the manhole cover 100 is supported by the manhole forming part 200. However, the inner diameter ID3 of the leg part 110 of the manhole cover 100 may be smaller than the outer diameter ED1 of the upper part (upper end) of the neck part 230. Further, the leg portion 110 of the manhole cover 100 may be omitted.

  When the manhole cover 100 is temporarily fixed to the manhole forming portion 200, first, one end of the binding wire 600 is inserted from the outside of the neck portion 230 through the through hole 233h, and further, the one end is inserted into the neck portion through another through hole 233h. Take out from inside 230. In addition, the manhole cover 100 is placed on the neck 230. Then, one end and the other end of the binding wire 600 are fastened on the upper side of the manhole cover 100. As a result, the manhole cover 100 is prevented from being detached from the manhole forming part 200.

  If the manhole cover 100 is temporarily fixed to the manhole forming part 200 in this way, the possibility of rainwater and foreign matter entering the wastewater treatment device 800 from the manhole 200h when the wastewater treatment device 800 is stored and transported is reduced. it can. Moreover, since the position difference of the manhole cover 100 with respect to the manhole formation part 200 is suppressed by the leg part 110 of the manhole cover 100, possibility that the manhole cover 100 will remove | deviate at the time of transport of the waste water treatment apparatus 800 can be reduced.

  Further, whether or not the raising member 400 is used when installing the waste water treatment apparatus 800 depends on the situation of the installation site. Therefore, when the wastewater treatment device 800 is shipped, a user (for example, a contractor) who installs the wastewater treatment device 800 on the site without fixing the manhole frame 300 to the manhole forming unit 200 can use the manhole frame 300 or the raising member 400. One of them may be selected and fixed to the manhole forming unit 200. Accordingly, if the manhole cover 100 is temporarily fixed to the manhole forming unit 200 without fixing the manhole frame 300 to the manhole forming unit 200, the convenience of the user can be improved.

  Further, when temporarily fixing one member called the manhole cover 100, the assembly of the plurality of temporarily fixed members may be shifted as in the case of temporarily fixing the two members of the manhole cover 100 and the manhole frame 300. Since there is no, it is possible to reduce the possibility that the temporary fixing is unintentionally released.

  In this manner, the manhole cover 100 can be easily temporarily fixed to the manhole forming portion 200 by using the through hole 233h. Further, as shown in FIG. 2, the height of the through hole 233 h is formed at a position higher than the lower end of the leg portion 340 of the manhole frame 300 when the manhole frame 300 is mounted (placed) on the manhole forming portion 200. Has been. Therefore, even if the through hole 233h is not used for fixing the manhole frame 300, the through hole 233h can be covered with the leg portion 340. As shown in FIG. 5, when the raising member 400 is used, the through hole 233 h can be covered with the raising member 400. As described above, it is possible to reduce the possibility of earth and sand or rainwater entering the waste water treatment apparatus 800 from the through hole 233h.

  FIG. 8 is an explanatory diagram showing the shape of the through hole 233 h of the third wall portion 233 of the manhole forming portion 200. The vertical direction in the figure indicates the vertical direction, and the horizontal direction in the figure indicates the horizontal direction. As illustrated, the shape of the through hole 233h is a substantially rectangular shape extending in the horizontal direction. The minimum size (minimum diameter) of the through hole 233h is the vertical size (also referred to as “first size IDv”). The first size IDv is substantially the same as the outer diameter of the fixing member 500 (FIG. 8A). By providing the fixing member 500 penetrating the through hole 233h with the large diameter portion 502 having a diameter larger than the first size IDv, the fixing member 500 can be prevented from coming out of the through hole 233h. For example, when the fixing member 500 is a rivet, the large-diameter portion 502 may be a rivet head or a crushed portion of the rivet end. When the fixing member 500 is a bolt, the large diameter portion 502 may be a bolt head or a nut fastened to the bolt.

  The horizontal size of the through hole 233h is a second size IDh that is larger than the first size IDv. A member having a wide cross-sectional shape having a thickness of the first size IDv or less and a width of the second size IDh or less can be passed through the through-hole 233h. For example, as shown in FIG. 8B, a wide binding wire 600 (for example, PP band) can be passed through the through hole 233h.

  Thus, if the through-hole 233h provided in the manhole forming part 200 is a hole whose size differs depending on the direction, the cross-sectional shape is not limited to a substantially circular member, and corresponds to the shape of the through-hole 233h. A member having a cross-sectional shape can also pass through the through-hole 233h. Therefore, various members can be used for fixing or temporary fixing. The shape of the through-hole 233h may be any other shape (for example, an ellipse or a star shape) different from the rectangle. However, the through hole 233h may be circular.

B. Second embodiment:
In the first embodiment described above, the inner diameter ID2 of the raising member 400 may be larger than the outer diameter ED2 of the first wall portion 231. In other words, there may be some play in the position of the raising member 400 with respect to the manhole forming portion 200. FIG. 9 is a cross-sectional view showing a mounted state of the manhole forming portion 200, the raising member 400, the manhole frame 300, and the manhole cover 100 when the inner diameter ID2 is larger than the outer diameter ED2. In this case, the raising member 400 can move in the horizontal direction with the raising member 400 mounted (mounted) on the manhole forming portion 200. FIG. 9 shows a state where the raising member 400 is moved rightward. As shown on the left side of FIG. 9, the movement of the raising member 400 is restrained by the first wall portion 231 of the neck portion 230 coming into contact with the inner surface of the raising member 400.

  In the present embodiment, as shown on the right side of FIG. 9, the width W of the upper surface portion 250 is larger than the difference DF between the inner diameter ID <b> 2 of the raising member 400 and the outer diameter ED <b> 2 of the first wall portion 231. As a result, even if the raising member 400 is moved in the horizontal direction until the first wall portion 231 of the neck portion 230 comes into contact with the inner surface of the raising member 400, the end portion of the raising member 400 is separated from the upper surface portion 250. Will not leave. That is, the end of the raising member 400 is placed on the upper surface 250 over the entire circumference. Accordingly, it is possible to suppress a large gap between the raising member 400 and the upper surface portion 250. As a result, water stoppage between the raising member 400 and the upper surface portion 250 can be easily performed.

C. Third embodiment:
In each of the above-described embodiments, the shape of the neck portion 230 is not limited to the shape shown in FIG. 3, and may be various other shapes. FIG. 10 is a cross-sectional view showing another embodiment of the neck. Unlike the neck portion 230 in FIG. 3, an inclined wall 231 </ b> A having no step extends from the inner peripheral edge 255 of the upper surface portion 250 to the fourth wall portion 234 in the neck portion 230 </ b> A. The other configuration is the same as the configuration of the neck 230 in FIG. Even when this neck portion 230A (manhole forming portion 200A) is used, the manhole frame 300 can be mounted (placed) on the neck portion 230A as in the embodiment of FIGS. And the raising member 400 can be mounted (placed) on the manhole forming part 200A as in the embodiment of FIGS. Similarly to the embodiment of FIG. 7, when the manhole cover 100 is placed on the manhole forming part 200A (neck part 230A), the leg part 110 of the manhole cover 100 surrounds the periphery of the neck part 230A, so that the manhole cover for the neck part 230A is covered. 100 positioning is performed. Thereby, when the manhole cover 100 is placed on the manhole forming part 200A, the positional deviation of the manhole cover 100 can be suppressed. And possibility that the temporary fixation of the manhole cover 100 will remove | deviate can be reduced.

  FIG. 11 is a cross-sectional view showing still another embodiment of the neck. Unlike the neck portion 230 in FIG. 3, an inclined wall 231 </ b> B having no step extends from the inner peripheral edge 255 of the upper surface portion 250 to the third wall portion 233 in the neck portion 230 </ b> B. The other configuration is the same as the configuration of the neck 230 in FIG. Even when this neck portion 230B (manhole forming portion 200B) is used, the manhole frame 300 can be mounted (placed) on the neck portion 230B as in the embodiment of FIGS. And the raising member 400 can be mounted | worn (mounted) on the manhole formation part 200B similarly to the Example of FIG. 5, FIG. Similarly to the embodiment of FIG. 7, when the manhole cover 100 is placed on the manhole forming part 200 </ b> B (neck part 230 </ b> B), the leg part 110 of the manhole cover 100 surrounds the periphery of the neck part 230 </ b> B. 100 positioning is performed. Thereby, when placing the manhole cover 100 on the manhole forming part 200 </ b> B, the positional deviation of the manhole cover 100 can be suppressed. And possibility that the temporary fixation of the manhole cover 100 will remove | deviate can be reduced.

  Although illustration is omitted, holes corresponding to the through hole 233h in FIG. 3 may be provided in the inclined wall 231A in FIG. 10 and the third wall portion 233 in FIG.

  In general, the shape of the neck is a variety of shapes configured such that the horizontal cross-sectional shape is substantially circular, and the outer diameter of the upper part (upper end) of the neck is smaller than the maximum outer diameter of the neck. Good. For example, the outer diameter of the central part of the neck may be larger than the outer diameter of the lower end of the neck. Also in this case, the raising member 400 is positioned by the inner surface of the raising member 400 being in contact with the maximum outer diameter portion of the neck. And the 2nd lower surface 312 of the manhole frame 300 can be mounted on the upper part (upper end) of the raising member 400 similarly to the Example of FIG. 5, FIG. Further, if the outer diameter of the upper part (upper end) of the neck part is smaller than the maximum outer diameter of the neck part, the first lower surface 311 of the manhole frame 300 is placed on the upper part (upper end of the neck part 230) as in the embodiment of FIGS. ). A leg 340 can be provided between the first lower surface 311 and the second lower surface 312. Specifically, a leg portion 340 having a thickness corresponding to the difference between the outer diameter of the upper portion (upper end) of the neck portion and the maximum outer diameter of the neck portion can be provided. Furthermore, the manhole frame 300 can be positioned by the legs 340 regardless of whether or not the raising member 400 is used.

  In order to easily form the manhole forming portion, it is preferable that the outer diameter of the neck portion gradually decreases from the lower end toward the upper end. For example, in the embodiment shown in FIG. 3, the first wall portion 231 and the fourth wall portion 234 may also be inclined walls that slightly incline in the inner circumferential direction D1 and extend obliquely upward.

D. Variations:
In addition, elements other than the elements claimed in the independent claims among the constituent elements in each of the above embodiments are additional elements and can be omitted as appropriate. The present invention is not limited to the above-described examples and embodiments, and can be implemented in various modes without departing from the gist thereof. For example, the following modifications are possible.

Modification 1:
In each of the embodiments described above, the upper surface portion 250 (for example, FIGS. 5 and 9) may be a curved surface instead of a flat surface. Also in this case, there may be a certain amount of play in the position of the raising member 400 relative to the manhole forming portion as in the embodiment of FIG. Here, even if the raising member 400 is moved in the horizontal direction until the inner surface of the raising member 400 comes into contact with the neck portion (for example, the neck portion 230 (FIG. 9), 230A (FIG. 10), 230B (FIG. 11)), the raising member 400 It is preferable that the neck portion and the upper surface portion are configured so as to prevent the lower end of 400 from separating from the upper surface portion over the entire circumference of the lower end. For example, a sufficiently large upper surface portion may be used. Further, the upper surface portion may have a shape corresponding to a part of the spherical surface. If it carries out like this, when the cylindrical raising member 400 is moved on an upper surface part, it can prevent easily that the lower end of the raising member 400 leaves | separates from an upper surface part over the perimeter of the lower end.

  Note that minute unevenness may be provided on the surface of the upper surface portion. In this case, a fine gap may be generated between the lower end of the raising member 400 and the upper surface portion. However, also in this case, if the end portion of the raising member 400 is in contact with the upper surface portion almost uniformly over the entire circumference, the annular lower end of the raising member 400 is separated from the upper surface portion over the entire circumference. It can be said that there is no. In this case, the gap between the raised member 400 and the upper surface portion can be easily sealed using a sealing material.

Modification 2:
In each of the above embodiments, the manhole forming portion (for example, the manhole forming portion 200 (FIG. 2), 200A (FIG. 10), 200B (FIG. 11)) may be formed by a spray-up method. In this case, the dimensions of the surface of the manhole forming portion (for example, the outer diameter ED1 (for example, FIGS. 2 and 3) of the upper portion of the neck portion 230 (the upper end of the third wall portion 233 and the fourth wall portion 234) and In order to make the outer diameter ED2 (at least one of the lower ends of the first wall portion 231) and the outer diameter ED2 (FIG. 3) a desired dimension, a molding die is fitted on the surface of the manhole forming portion. It is preferable to cure the resin.

Modification 3:
The configuration of the waste water treatment apparatus may be various configurations different from the configurations of the above embodiments. For example, in each of the above embodiments, the first lower surface 311 and the second lower surface 312 of the manhole frame 300 are on the same plane, but instead, the first lower surface 311 is separated from the plane including the second lower surface 312. May be in position. Moreover, the leg part 340 (FIGS. 2 to 4) of the manhole frame 300 may be formed only on a part of the annular frame body 310, instead of being formed over the entire circumference of the annular frame body 310. In either case, when the manhole frame is mounted (placed) on the neck, the manhole frame and the neck are positioned so that the leg of the manhole frame contacts the neck and the horizontal movement of the manhole frame is restrained. It is preferable to be configured. Here, a configuration that can restrain any horizontal movement is preferable.

  FIG. 12 is an explanatory view showing another embodiment of the leg portion of the manhole frame. FIG. 12 is a cross-sectional view of the assembly of the manhole frame and the manhole forming portion as viewed from above downward, and shows a cross section at the same position as FIG. In the embodiment of FIG. 12, the manhole frame has three legs 340A1, 340A2, 340A3. These leg portions 340A1, 340A2, and 340A3 are respectively disposed at first to third positions P1 to P3 on a circle along the outer peripheral direction D2 side of the third wall portion 233 (neck portion). In the figure, three central angles Ag1 to Ag3 are shown. The first center angle Ag1 is an arc whose ends are the first position P1 and the second position P2, and is the center angle of the arc Ac1 that does not pass through the third position P3. The second center angle Ag2 is the second center angle Ag2. The arc is the end of the position P2 and the third position P3, and is the center angle of the arc Ac2 that does not pass through the first position P1, and the third center angle Ag1 is determined by the relationship between the third position P3 and the first position P1. This is the central angle of an arc Ac3 that is an end and does not pass through the second position P2. Here, if any of the three central angles Ag1 to Ag3 is less than 180 degrees, the leg portions 340A1 to 340A3 come into contact with the neck portion (third wall portion 233), so that an arbitrary horizontal direction of the manhole frame with respect to the neck portion Can stop the movement. As a result, the position shift of the manhole frame relative to the neck can be easily suppressed.

  As described above, when any two positions of the three positions P1 to P3 are selected, the leg portions of the manhole frame are arcs whose ends are the ends, and are not selected. It is provided at three positions P1 to P3 (at least three positions) such that the center angles of arcs that do not pass through the positions (for example, center angles Ag1, Ag2, Ag3 in FIG. 12) are less than 180 degrees. preferable. Here, leg portions 340A1 to 340A3 separated from each other may be provided at each of the three positions P1 to P3 as in the embodiment of FIG. Instead, one continuous leg may be provided over two positions (for example, the first position P1 and the second position P2). Alternatively, one continuous leg may be provided over three positions.

  In either case, if the maximum value of the horizontal displacement of the manhole frame due to the gap between the leg and neck of the manhole frame is within the allowable range with the manhole frame mounted (placed) on the neck , “The leg is in a position along the outer peripheral side of the neck”. Here, the allowable range may be a range that does not cause a problem in the installation and operation of the wastewater treatment apparatus, and is preferably, for example, 25 mm or less, particularly preferably 15 mm or less, and most preferably 10 mm or less. preferable.

  Further, the configuration of the neck may be another configuration different from the above-described embodiments. For example, the outer diameter of the upper part of the neck part may be larger than the inner diameter of the leg part of the manhole frame (for example, the outer diameter ED1 in FIG. 3 may be larger than the inner diameter ID1). In this case, the fitting part which fits with the leg part of a manhole frame may be provided in the upper part of the neck part. For example, three concave portions that fit into the three leg portions 340A1 to 340A3 shown in FIG. 12 may be provided in the upper portion of the neck portion. Such a recessed part may be a recessed part formed when the surface of the outer peripheral direction D2 of a neck part dents toward the inner peripheral direction D1, for example. This recess may extend from the upper end (upper part) to the lower end of the neck part. Thus, when providing a fitting part in a neck part, the leg part of a manhole frame does not need to be arrange | positioned in the positional relationship as demonstrated in FIG. 12 (for example, only one leg part 340A1 of FIG. 12). Alternatively, only two legs 340A1 and 340A2 may be provided on the manhole frame). The number of fitting portions provided in the neck may be one or two or more (plural).

Similarly, the leg portion 110 (for example, FIG. 7) of the manhole cover 100 may be formed only on a part of the edge of the manhole cover 100 instead of being formed over the entire circumference of the disk-shaped manhole cover 100. Good. In either case, when placing the manhole cover on the neck, the manhole cover and the neck are configured so that the leg of the manhole cover contacts the neck and the horizontal movement of the manhole cover is restrained. It is preferable. Here, a configuration that can restrain any horizontal movement is preferable. The structure of such a leg part of the manhole cover may be the same structure as the leg part of the manhole frame described above. For example, the following configuration can be adopted.
The leg of the manhole cover protrudes downward from the edge of the manhole cover,
The manhole cover can be placed on the top of the neck with the legs in a position along the outer circumferential side of the neck.
The leg portions of the manhole cover are provided at least at the first position, the second position, and the third position, which are positions on the circular edge of the manhole cover,
The central angle of the arc from the first position to the second position and not passing through the third position is less than 180 degrees;
The central angle of the arc from the second position to the third position and not passing through the first position is less than 180 degrees;
The central angle of the arc from the third position to the first position and not passing through the second position is less than 180 degrees.
Here, when taking into account the dimensional tolerance (play), all three central angles are preferably 160 degrees or less, particularly preferably 140 degrees or less, and 120 degrees. Most preferred. However, when the fitting part is provided in the neck part as mentioned above, the leg part of the manhole cover does not need to be arrange | positioned in the above positional relationships. Here, the manhole cover may be provided with one or a plurality of leg portions that fit into the fitting portion of the neck portion. For example, only one leg corresponding to the leg 340A1 in FIG. 12 or only two legs corresponding to the legs 340A1 and 340A2 may be provided on the manhole cover.
(A similar configuration can be adopted for the leg portion of the manhole frame).

  Here, with the manhole cover placed on the neck, if the maximum value of the horizontal displacement of the manhole cover due to the gap between the leg and the neck of the manhole cover is within the allowable range, It can be said that it is in a position along the outer peripheral side of the neck. Here, the allowable range may be a range that does not cause a problem in the installation and operation of the wastewater treatment apparatus, and is preferably, for example, 25 mm or less, particularly preferably 15 mm or less, and most preferably 10 mm or less. preferable.

  Moreover, also when using the raising member 400, the above-mentioned various structures of the leg part of a manhole frame are employable. In any case, as shown in FIG. 5, it is preferable that the raising member 400 is disposed on the outer peripheral direction D2 side of the leg portion of the manhole frame. If it carries out like this, the leg part of a manhole frame can contact the raising member 400, and it can prevent that a leg part jumps out of the raising member 400 (the horizontal movement of a manhole frame is stopped). As a result, the position shift of the manhole frame can be suppressed. Here, in a state where the manhole frame is placed on the raising member 400, the maximum value of the horizontal displacement of the manhole frame due to the gap between the leg portion of the manhole frame and the raising member 400 is preferably within an allowable range. . Here, the allowable range may be a range that does not cause a problem in the installation and operation of the wastewater treatment apparatus, and is preferably, for example, 25 mm or less, particularly preferably 15 mm or less, and most preferably 10 mm or less. preferable.

  Further, in each of the above embodiments, the shape of the manhole is substantially circular, but instead, the shape of the manhole may be another shape (for example, a rectangle) different from the circle. Also in this case, the manhole forming portion, the manhole frame, the manhole cover, and the raising member may be configured as in the above-described embodiments. When the shape of the manhole is rectangular, the shapes of the manhole forming portion, the manhole frame, the manhole cover, and the raising member may be rectangular when viewed from above downward. . For example, the neck portion may be a cylindrical (hollow columnar) portion having a rectangular horizontal cross-sectional shape.

Modification 4:
In each of the above embodiments, the raising member 400 is a cylindrical member having a substantially uniform outer diameter and inner diameter from the lower end to the upper end. Therefore, when a product obtained by cutting a sufficiently long cylindrical member is used as the raising member 400 at the installation site of the waste water treatment apparatus 800, the remaining cylindrical member after the cutting is used as another raising member 400. be able to.

Modification 5:
The manhole forming part, the manhole frame, the manhole cover, and the raising member in each of the above embodiments are not limited to a wastewater treatment apparatus that accommodates a treatment tank that performs anaerobic treatment and aerobic treatment, and other various treatment tanks. Applicable to wastewater treatment equipment to be accommodated. For example, the present invention may be applied to a discharge pump tank that performs a process of temporarily storing treated water and pumping it up to a high position.

100 ... Manhole cover 110 ... Leg part 200 ... Manhole formation part 200A ... Manhole formation part 200B ... Manhole formation part 200h ... Manhole 230 ... Neck part 230A ... Neck part 230B. ..Neck 231 ... First wall 231A ... Inclined wall 231B ... Inclined wall 232 ... Second wall 233 ... Third wall 233h ... Through hole 234 ... No. 4 walls 234e ... inner end 250 ... upper surface 255 ... inner peripheral edge 300 ... manhole frame 310 ... frame main body 311 ... first lower surface 312 ... second lower surface 320 .. Inner protrusion 325 ... recess 330 ... outer protrusion 340,340A1,340A2,340A3 ... leg 340h ... through hole 400 ... lifting member 410 ... rib 500 ... fixed Member 502 ... Large diameter portion 600 ... Bundling wire 800 ... Waste water treatment device 801 ... Inflow pipe 802 ... Discharge pipe 810 ... Upper tank 820 ... Bottom Tank 830 ... Main body C1 ... Base concrete C2 ... Concrete slab

Claims (6)

Wastewater treatment equipment,
A main body for accommodating a treatment tank for treating waste water;
A manhole forming portion provided in the main body and forming a manhole;
A manhole cover for closing the manhole;
A manhole frame that supports the manhole cover;
With
The manhole forming part is
A neck that is a hollow columnar part that protrudes upward and forms the manhole at the top;
An upper surface forming an upper surface surrounding the entire circumference of the lower end of the neck;
Including
The upper part of the neck part supports the manhole frame when the manhole frame is placed on the manhole forming part,
The upper surface portion has an annular shape when the hollow columnar raising member for supporting the manhole frame instead of the neck portion is placed on the manhole forming portion so as to surround the neck portion. Support the lower end of the entire circumference,
The manhole forming part is configured to restrain the movement of the raising member by contacting the inner surface of the raising member with respect to the horizontal movement of the raising member placed on the manhole forming part. The annular lower end of the raising member is configured to prevent the entire lower end from being separated from the upper surface portion,
When viewed from above, the direction from the center of gravity of the shape formed by the outline of the manhole toward the outside of the manhole is referred to as the outer circumferential direction, and the direction from the outside of the manhole toward the center of gravity is the inner circumferential direction. When calling
The manhole frame is formed between the first lower surface, the second lower surface formed on the outer circumferential direction side with respect to the first lower surface, the first lower surface and the second lower surface, and the first lower surface and A first leg projecting downward from the second lower surface,
The manhole frame, the neck, and the raising member are
(A) When the manhole frame is placed on the manhole forming portion, the first lower surface is the upper portion of the neck portion in a state where the first leg portion is disposed on the outer peripheral direction side of the neck portion. The first leg is in contact with the neck and restrains the horizontal movement of the manhole frame,
(B) When the manhole frame is placed on the raising member, the second lower surface is an upper end of the raising member in a state where the raising member is disposed on the outer peripheral direction side of the first leg portion. And the first leg is configured to stop the movement of the manhole frame in a horizontal direction by contacting the raising member.
Wastewater treatment equipment. A wastewater treatment apparatus according to claim 1,
The manhole cover includes a second leg protruding downward.
The manhole cover and the neck are
When the manhole cover is placed on the top of the neck without the manhole frame, the lower surface of the manhole cover is placed on the neck with the second leg disposed on the outer peripheral side of the neck. Supported by the upper part, the second leg is configured to stop the movement of the manhole cover in the horizontal direction by contacting the neck.
Wastewater treatment equipment. The waste water treatment apparatus according to claim 1 or 2,
The neck portion is configured such that the horizontal cross-sectional shape is circular and the outer diameter of the upper portion is smaller than the maximum outer diameter of the neck portion.
Wastewater treatment equipment. A wastewater treatment apparatus according to any one of claims 1 to 3,
The neck has a hole penetrating from the inner circumferential side to the outer circumferential side,
The hole is formed at a position higher than a lower end of the first leg portion of the manhole frame when the manhole frame is placed on the manhole forming portion.
Wastewater treatment equipment. The waste water treatment apparatus according to claim 4,
The first leg portion of the manhole frame has a hole penetrating from the inner circumferential direction side to the outer circumferential direction side,
The hole of the first leg portion is formed at a height that can overlap the hole of the neck portion when the manhole frame is placed on the manhole forming portion.
Wastewater treatment equipment. The waste water treatment apparatus according to claim 4 or 5,
The size of the hole in the neck varies depending on the direction,
The minimum size of the hole in the neck is the first size;
The size of at least one direction of the hole of the neck is a second size larger than the first size.
Wastewater treatment equipment.

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