JP2001262680A - Structure of yard catch basin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide structure of a yard catch basin of which main body made of a synthetic resin can be used even in places, etc., where road surface load is added, all rainwater which has flown into a lid frame from a water permeable lid is made to flow into the basin main body, and there is no need for a separate-body funnel, etc. SOLUTION: The structure of the yard catch basin is provided with an inspection tube 7 connected to the upper part of the basin main body 1 embedded underground and connected to the inside of the basin main body 1, and open at the upper end, a vertical tubular lid frame 15 opening/closing-freely provided at the upper-end opening part with the water permeable lid 13 which is arranged approximately in the same plane as the ground surface and in which a water permeating holes are bored, and a ring-shaped pedestal 17 which is embedded and supported underground and in which the lower end of the lid frame 15 is mounted and fixed to the upper surface and the upper end of the inspection tube 7 is freely fitted in the lower-surface side. A taper 33 to connect a large-diameter opening 29 on the upper-surface side approximately equal to the inner diameter of the lid frame 15 to a small-diameter opening 31 on the lower-surface side smaller than the inner diameter of the inspection tube 7 is formed in the inner circumferential surface of the pedestal 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a rainwater in which a protective cover having a cover with a water hole is provided discontinuously so as not to transmit a road surface load, on a top of a box body buried underground. The structure of the basin.

[0002]

2. Description of the Related Art Conventionally, rainwater basins are installed in rainwater facilities buried in roads, residential lands, and the like. The rainwater basin has a function of collecting rainwater that has fallen on the ground and checking and cleaning the rainwater pipe. For this reason, the rainwater basin is provided with a basin body for collecting rainwater and a water cover for flowing rainwater on the ground. The rainwater basin is provided with a mud reservoir at the bottom of the basin to prevent earth and sand from flowing into the rainwater mains. As a basin body,
Generally, those made of circular or square concrete or reinforced concrete are used.

In recent years, such a conventional concrete rainwater basin has become a home-made rainwater basin made of synthetic resin. This synthetic resin rainwater basin has, for example, an upwardly directed inspection cylinder at the top of the basin body, and a mud reservoir containing a bucket that can be freely inserted and removed at the bottom of the basin main body. A lid is attached. Such a synthetic resin rainwater basin is intended for indoor use and does not receive a road surface load such as a vehicle load, and thus does not have a load-bearing structure against a road surface load.

[0004] On the other hand, sewage basins today are called PVC small-mouth manholes and are buried under public roads to constitute a part of public sewerage facilities. A request began to form a part. However, since the synthetic resin rainwater basin does not have a load-bearing structure as described above, it is vulnerable as a public sewerage facility and cannot be diverted to a public sewerage facility as it is.

[0005] Therefore, it has been proposed to combine a protective lid stipulated by the Japan Sewerage Association Standard with a rainwater basin made of synthetic resin for home use. The protective lid includes an annular pedestal, a cylindrical lid frame placed on the upper surface of the pedestal, and an iron lid capable of opening and closing the upper opening of the lid frame (for example, Japanese Utility Model Publication No. No. 138, Japanese Utility Model Publication No. 5-23671,
See JP-A-7-189332). In particular, according to the Japan Sewerage Association Standard, when the inspection cylinder has a nominal diameter of 200 mmφ, for example, the inner surface diameter of the pedestal is set to a minimum of 220 mmφ so that the road surface load of a vehicle or the like acting on the iron lid is not transmitted to the inspection cylinder or the pit body. ing.

[0006]

However, when the conventional protective lid is combined with an existing in-house synthetic resin rainwater basin, all of the rainwater flowing down from the drainage lid does not enter the inspection cylinder, and the inspection cylinder and the pedestal do not. It was feared that it would flow into the gap between the two and soften the ground near the installation of the rainwater basin, thereby impairing the stability of the installation of the protective lid. In particular, the construction of the protective lid requires that the pedestal be installed after sufficiently smashing it with a granulated stone (so-called grindstone) around the erected inspection cylinder, and then installing the pedestal. , And even if the periphery of the lid frame is hardened with asphalt or the like, there is a possibility that the iron lid abuts on the upper end of the inspection tube due to the sinking of the pedestal. Also, a structure in which a separate funnel is attached to the protective lid has been proposed,
There is a concern that the number of parts will increase, the product cost will increase, and the workability will also decrease.

[0007] The present invention has been made in view of the above-mentioned circumstances, and it is possible to use a synthetic resin box body even in a place where a road surface load is applied, so that rainwater flowing into a lid frame from a water passage lid can be removed. It is an object of the present invention to provide a structure of a rainwater basin in which all the water flows into the basin body and does not require a separate funnel or the like to improve reliability, reduce the cost of products, and improve workability.

[0008]

Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments. The structure of the rainwater basin according to claim 1 of the present invention comprises an inspection cylinder 7 connected to an upper part of a basin body 1 buried in the ground, communicating with the inside of the basin body 1, and having an open upper end; And a vertically cylindrical lid frame 15 having a lid 13 provided with a water passage hole at the upper opening so as to be openable and closable, and a lower end of the lid frame 15 buried in the ground and supported on the upper surface. A rainwater basin having an annular pedestal 17 mounted and fixed and having an upper end of the inspection tube 7 loosely fitted on a lower surface side thereof, wherein the pedestal 1
7 is formed on the inner peripheral surface thereof with a taper 33 that connects a large-diameter opening 29 on the upper surface substantially equal to the inner diameter of the lid frame 15 and a small-diameter opening 31 on the lower surface smaller than the inner diameter of the inspection cylinder 7. Features.

In the structure of the rainwater basin, the load on the road surface to be transmitted to the basin body 1 via the lid frame 15 is cut off by the loose fitting portion 25 between the pedestal 17 and the basin body 1. This makes it possible to use the synthetic resin box main body 1 having relatively low strength even in a place where a road surface load is applied. And pedestal 17
The taper 33 is provided on the inner peripheral surface of the
All of the rainwater that has flowed into the lid frame 15 is guided to the basin body 1. This prevents rainwater from flowing out from the gap between the pedestal 17 and the inspection cylinder 7, and the foundation 35 supporting the pedestal 17 is not softened. Further, since the taper 33 is formed on the pedestal itself, there is no need to provide a separate funnel or the like, and the number of parts does not increase. This suppresses an increase in product cost, and also facilitates construction and maintenance.

[0010] The structure of the rainwater basin according to the second aspect of the present invention comprises an inspection cylinder 7 which is connected to the upper part of the basin body 1 buried in the ground, communicates with the inside of the basin body 1 and has an open upper end. , A lid 13 disposed substantially flush with the ground surface and provided with a water passage hole 13a
A vertically cylindrical lid frame 15 which is openably and closably provided at an upper end opening;
A rainwater basin structure having an annular pedestal 71 buried and supported in the ground and mounting and fixing the lower end of the lid frame 15 on the upper surface and loosely fitting the upper end of the inspection tube 7 on the lower surface side, at least A water hole 13a formed near the periphery of the lid 13.
The taper 75 which is located immediately below the pedestal 71 and extends in the center direction and downward from the inner peripheral edge of the pedestal 71 is formed integrally with the pedestal 71.

In the structure of the rainwater basin, the road surface load to be transmitted to the basin body 1 through the lid frame 15 is cut off by the loose fitting portion 25 between the pedestal 71 and the basin body 1. This makes it possible to use the synthetic resin box main body 1 having relatively low strength even in a place where a road surface load is applied. And the pedestal 71
Is provided with a taper 75, so that rainwater flowing into the lid frame 15 from the lid 13 is guided to the tub body 1. In particular, when the water passage hole 13a formed in the cover 13 is not provided on the entire surface of the cover 13 but is formed only in a part of the peripheral portion of the cover 13 or the like, the taper 75 just below the hole 13a is provided.
The rainwater flowing in is guided to the basin body 1. This allows
The rainwater is prevented from flowing out from the gap between the pedestal 71 and the inspection cylinder 7, and the foundation supporting the pedestal 71 is not softened. Further, since the taper 75 is formed on the pedestal itself, there is no need to provide a separate funnel or the like, and the number of parts does not increase. This suppresses an increase in product cost, and also facilitates construction and maintenance. Further, since the inner peripheral edge portion of the pedestal 71 except for the portion immediately below the water passage hole 13a does not form the taper 75, a configuration in which the hinge portion 70 connecting the lid 13 and the lid frame 15 does not interfere can be obtained. .

In the rainwater basin according to a third aspect of the present invention, the pedestal 71 has a tubular portion 72 fitted into a lower end of the lid frame 15, and the tapered portion 75 is formed at an upper end of the tubular portion 73. It is characterized by being done.

In the structure of the rainwater basin, since the cylindrical portion 73 provided on the pedestal 71 is fitted into the lower end of the lid frame 15, the pedestal 71
Positioning of the lid frame 15 with respect to
Since the distance between the lid 13 and the taper 75 is shortened, the inflow of rainwater becomes more reliable.

The structure of the rainwater basin according to a fourth aspect of the present invention is characterized in that the inspection tube 7 is connected to an upper portion of the basin body 1 buried in the ground, communicates with the inside of the basin body 1 and has an open upper end. A vertically cylindrical lid frame 41 (or 63) having a lid 13 disposed substantially flush with a water passage hole and capable of being opened and closed at an upper end opening; (Or 63), the lower end of which is mounted and fixed, and the lower surface side of which is provided with an annular pedestal 45 into which the upper end of the inspection tube 7 is loosely fitted. On the inner peripheral wall, the lid frame 4
A funnel portion 43 (or 61) for continuously connecting an upper large-diameter opening 47 substantially equal to the inner diameter of the first (or 63) and a lower small-diameter opening 49 smaller than the inner diameter of the inspection tube 7 is integrally formed. .

The structure of the rainwater basin has the following operation in addition to the basic operation of the structure of the rainwater basin of the first aspect.
That is, the funnel part 4 is provided on the inner peripheral wall of the lid frame 41 (or 63).
3 (or 61) are formed integrally, so that the lid 13
Is immediately led to the inspection tube 7 by the funnel 43 (or 61). Therefore, the rainwater does not fall along the inner wall of the lid frame 41 (or 63), and the connecting portion 53 between the lid frame 41 (or 63) and the pedestal 45, which is the lower end portion of the lid frame 41 (or 63), is rainwater. Will not pass. This prevents rainwater from flowing out of the connection portion 53 between the lid frame 41 (or 63) and the pedestal 45, and also makes the waterproof seal at that portion simple. Further, since the lower end of the funnel portion 61 can be hung down and loosely fitted on the inner diameter side of the inspection tube 7, rainwater can be more reliably introduced into the inspection tube 7, and such a loose fitting structure can be used. Then, the positioning of the lid frame 63 and the inspection cylinder 7 at the time of installation becomes easy and reliable.

The structure of the rainwater basin according to the fifth aspect of the present invention is characterized in that the inspection tube 7 is connected to the upper portion of the basin body 1 buried in the ground, communicates with the inside of the basin body 1 and has an open upper end; A vertically cylindrical lid frame 81 having a lid 13 disposed substantially flush with the water passage hole 13a and capable of being opened and closed at an upper end opening portion, and a lower end of the lid frame 81 embedded in the ground and supported on the upper surface. An annular pedestal 45 for mounting and fixing the upper end of the inspection tube 7 on the lower surface side.
The structure of a rainwater basin having at least a water hole 13a formed at least in the vicinity of the peripheral edge of the lid 13, and located in the center direction and downward from the inner peripheral wall of the lid frame 81 A feature is that a funnel-shaped slope 83 extending is formed integrally with the lid frame 81.

According to the structure of the rainwater basin, the above claim 4 is provided.
In addition to the function of the structure of the rainwater basin, there are the following functions. That is, since the funnel-shaped slope 83 integrally formed on the inner peripheral wall of the lid frame 81 is not formed on the inner peripheral wall except for a portion immediately below the water hole 13 a formed near the peripheral edge of the lid 13, It is possible to obtain a configuration in which the hinge portion 70 connecting the lid 13 and the lid frame 81 does not interfere.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the structure of a rainwater basin according to the present invention will be described below in detail with reference to the drawings.
FIG. 1 is a sectional view showing a first embodiment of the structure of a rainwater basin according to the present invention.

The structure of the rainwater basin according to the present embodiment includes a rainwater basin A buried under the ground and a buried above the rainwater basin A and communicated with the inside of the rainwater basin A, and the upper surface is exposed to the ground. It is configured by a combination with the protective cover B.

In the rainwater basin A, rainwater pipe connection portions 3a and 3b are formed on both side walls of the PVC main body 1 of injection molding. The rainwater pipes 5a and 5b for inflow and upstream which are buried in the ground are connected to the rainwater pipe connection portions 3a and 3b.

A lower end of an inspection tube 7 formed of a PVC pipe and having upper and lower ends opened is connected to an upper portion of the basin body 1. Masu body 1
Is provided with a mud reservoir 9 projecting downward from the rainwater pipe connection portions 3a, 3b. Therefore, the mud mixed with the rainwater flowing in from the rainwater pipe 5a for inflow settles in the mud reservoir 9 and can be taken out from the upper opening of the protective cover B via the inspection tube 7.

On the other hand, the protective cover B is disposed substantially flush with the ground surface, and has a water cover 13 having a water hole as a cover.
A vertical cylindrical lid frame 15 having this water-permeable lid 13 openably and closably provided at an upper opening portion, and a lid frame 1 embedded and supported in the ground,
And an annular pedestal 17 for mounting and fixing the lower end of 5.

The water cover 13 and the cover frame 15 are made of, for example, cast iron. The pedestal 17 is made of concrete, reinforced concrete,
Or, it is made of a hard synthetic resin or the like. The water passage cover 13 may have a lattice structure in addition to a structure in which a large number of water passage holes 13a are formed.

An annular groove 19 is formed on the upper surface of the pedestal 17. An outward flange 21 is formed at the lower end of the lid frame 15. The lid frame 15 and the pedestal 17 have a structure in which the flange 21 is placed and attached to the groove 19 or the groove 1
9 is provided with a bayonet groove, and is detachably attached to the flange 21 by bayonet coupling.

The water cover 13 and the cover frame 15 are connected by a chain (not shown) provided therebetween. A jig hole 23 for inserting a lid switch (not shown) is provided in a part of the water-passing lid 13 in the circumferential direction by cutting the water-passing lid 13 radially inward.

On the lower surface side of the pedestal 17, the upper end of the inspection tube 7 is loosely fitted. In this embodiment, a concave loose fitting portion 25 is formed on the lower surface side of the pedestal 17.
, The upper end of the inspection tube 7 is inserted.

The loose fitting portion 25 has an inner diameter D1 larger than the outer diameter d1 of the inspection tube 7. Further, the depth H1 of the loose fitting portion 25 is larger than the insertion depth h1 of the inspection tube 7. That is, the inspection cylinder 7 and the pedestal 17 can be relatively moved in the diameter direction and the axial direction.

On the upper surface side of the pedestal 17, the inner diameter D of the lid frame 15 is provided.
A large-diameter opening 29 substantially equal to 2 is formed. Below the large-diameter opening 29, a small-diameter opening 31 whose inner diameter D3 is smaller than the inner diameter d2 of the inspection tube 7 is formed. That is, the pedestal 17
Is formed with a taper 33 in which a large-diameter opening 29 and a small-diameter opening 31 are continuous.

Next, the operation of the structure of the rainwater basin thus configured will be described. In the structure of the rainwater basin, the pedestal 17 to which the lid frame 15 is fixed and the inspection tube 7 are loosely fitted without being fixed by the loose fitting portion 25. Accordingly, the road surface load that is transmitted to the box body 1 via the lid frame 15 is:
It is cut off by the loose fitting structure between the pedestal 17 and the main body 1. This makes it possible to use the relatively low-strength synthetic resin rainwater basin A even in places where road surface loads are applied.

Since the taper 33 is provided on the inner periphery of the pedestal 17, all of the rainwater flowing into the lid frame 15 from the water flow lid 13 is guided to the cell body 1. This prevents rainwater from flowing out from the gap between the pedestal 17 and the inspection tube 7 (that is, the loosely-fitted structure portion), and the foundation 35 supporting the pedestal 17 is not softened.

Further, since the taper 33 is formed on the pedestal itself, there is no need to provide a separate funnel or the like, and the number of parts does not increase. This suppresses an increase in product cost, and also facilitates construction and maintenance.

Next, a second embodiment of the structure of the rainwater basin according to the present invention will be described with reference to FIG. FIG. 2 is a sectional view showing a second embodiment of the structure of the rainwater basin according to the present invention. The same members as those shown in FIG. 1 are denoted by the same reference numerals, and overlapping description will be omitted.

The structure of the rainwater basin according to this embodiment is characterized in that a funnel part 43 is formed integrally with the inner periphery of the lid frame 41. Therefore, the base 45 has the taper 3
Those not provided with 3 are used.

The upper part of the funnel part 43 has an inner diameter D2 of the lid frame 41.
The upper large-diameter opening 47 is substantially equal to. The lower part of the funnel part 43 is a lower small-diameter opening 49 whose inner diameter D4 is smaller than the inner diameter d2 of the inspection tube 7. Further, in this embodiment, a gap 51 is provided between the upper end of the inspection tube 7 and the lower end of the funnel 43.

Therefore, the structure of the rainwater basin according to this embodiment has the following operation in addition to the basic operation of the structure of the rainwater basin according to the first embodiment. That is, since the funnel part 43 is formed integrally with the inner periphery of the lid frame 41, the rainwater that has passed through the water passage lid 13 is immediately guided to the inspection cylinder 7 by the funnel part 43.

Therefore, the rainwater does not fall along the inner wall of the lid frame 41, and the rainwater does not pass through the connecting portion 53 between the lid frame 41 and the pedestal 45, which is the lower end of the lid frame 41. This prevents rainwater from flowing out of the connection portion 53 between the lid frame 41 and the pedestal 45, and prevents the foundation 3 supporting the pedestal 45.
5 does not soften. Further, the waterproof seal of the portion can be simplified.

Next, a third embodiment of the structure of the rainwater basin according to the present invention will be described with reference to FIG. FIG. 3 is a sectional view showing a third embodiment of the structure of the rainwater basin according to the present invention. The same members as those shown in FIGS. 1 and 2 are denoted by the same reference numerals, and overlapping description will be omitted.

The structure of the rainwater basin according to this embodiment is characterized in that a funnel 61 substantially similar to that described in the second embodiment is integrally formed on the inner periphery of the lid frame 63. . Therefore, also in this embodiment, a pedestal 45 having no taper 33 is used.

The difference from the structure of the rainwater basin according to the second embodiment lies in the connection structure between the lower end of the funnel 61 and the inspection cylinder 7. That is, the lower end of the funnel portion 61 has an outer diameter D5
Are formed smaller than the inner diameter d2 of the inspection tube 7. Further, the lower end of the funnel 61 is inserted into the inner diameter side of the inspection tube 7.

Therefore, the structure of the rainwater basin according to this embodiment has the following operation in addition to the operation of the structure of the rainwater basin according to the second embodiment. That is, since the lower end of the funnel portion 61 can be inserted into the inner diameter side of the inspection tube, the rainwater can be more reliably introduced into the inspection tube 7. Also,
With such a loose fitting structure, the positioning of the lid frame 63 and the inspection cylinder 7 when the lid frame 63 is installed can be reliably and easily performed.

Next, a fourth embodiment of the structure of the rainwater basin according to the present invention will be described with reference to FIG. FIG. 4 is a sectional view showing a fourth embodiment of the structure of the rainwater basin according to the present invention. Note that the same members as those shown in FIGS. 1 to 3 are denoted by the same reference numerals, and redundant description will be omitted.

In the structure of the rainwater basin according to this embodiment,
The structure of the water passage cover 13 is not provided with a large number of water passage holes 13a. As shown in FIG. It is a structure that is drilled at each position orthogonal to each other, and connects the water-flow lid 13 and the lid frame 15 with a hinge 70, that is, the water-flow lid 13 can be freely opened and closed with respect to the lid frame 15. It has become. The hinge part 70 has a hinge structure, and the lid frame 1
A support rod 7 for supporting the water cover 13 when opening the water cover 13
0a. The support rod 70a is configured to extend downward into the lid frame 15 with the water cover 13 closed.

The pedestal 71 in this embodiment is formed in an annular shape, and has a cylindrical portion 73 integrally formed on the upper surface side. The cylindrical portion 73 extends upward from the upper surface side of the pedestal 71, and the extension height H2 from the upper surface of the pedestal 71 is set to approximately の of the height from the lower edge of the lid frame 15 to the opening 47.
The outer diameter D6 is formed smaller than the inner diameter D2 of the lid frame 15.

The upper end of the cylindrical portion 73 is formed with a taper 75 extending centrally and downward from the periphery thereof. The taper 75 is located immediately below the water hole 13 a of the water cover 13,
In addition, it is not continuous in the circumferential direction and is formed intermittently via the notch 77. In the present embodiment, as shown in FIG. 6, two tapers 75 are formed facing each other, and
Is provided in correspondence with. The lower end edge of the taper 75 has an inner diameter D7 smaller than the inner diameter d2 of the inspection tube 7.

The hollow portion of the cylindrical portion 73 is formed as a concave loose fitting portion 25 formed on the lower surface side of the pedestal 71, and the inner diameter D1 is formed larger than the outer diameter d1 of the inspection tube 7. Thus, the upper end of the inspection tube 7 is inserted.

The pedestal 71 in this embodiment has a cylindrical portion 73 and is made of an olefin resin or concrete.

Accordingly, in the structure of the rainwater basin according to this embodiment, the lid frame 1 is provided in the same manner as in the first to third embodiments.
5 is cut off by the loose fitting portion 25 between the pedestal 71 and the box body 1, so that a relatively low-strength synthetic resin can be used in places where the road surface load is applied. Main body 1 made of glass can be used. And
By providing the base 71 with the taper 75,
The rainwater that has flowed into the lid frame 15 is guided to the basin body 1.

In particular, when the water passage hole 13a formed in the cover 13 is not provided on the entire surface of the cover 13 but is formed only in a part of the peripheral portion of the cover 13 or the like, the water hole 13a is provided directly below the hole. The rainwater flowing through the taper 75 is guided to the basin body 1. This prevents rainwater from flowing out from the gap between the pedestal 71 and the inspection cylinder 7, and the foundation supporting the pedestal 71 does not become soft. Further, since the taper 75 is formed on the pedestal itself, there is no need to provide a separate funnel or the like, and the number of parts does not increase. This suppresses an increase in product cost, and also facilitates construction and maintenance.

Further, the inner peripheral edge portion of the pedestal 71 except for the portion immediately below the water passage hole 13a has a cutout portion 77 in which the taper 75 is not formed.
And a support rod 70a of the hinge 70 that does not interfere with each other.

Further, in the structure of the rainwater basin, the pedestal 71
Is fitted into the lower end of the lid frame 15,
The positioning of the lid frame 15 with respect to the pedestal 71 becomes easy, and the distance between the lid 13 and the taper 75 is shortened, so that the inflow of rainwater becomes more reliable.

Next, a fifth embodiment of the structure of the rainwater basin according to the present invention will be described with reference to FIG. FIG. 5 is a sectional view showing a fifth embodiment of the structure of the rainwater basin according to the present invention. Note that the same members as those shown in FIGS. 1 to 3 and 4 are denoted by the same reference numerals, and overlapping descriptions will be omitted.

The structure of the rainwater basin according to this embodiment is that the funnel-shaped slope 83 is integrally formed on the inner periphery of the lid frame 81, similarly to the second and third embodiments described above. It is characterized by. Therefore, the base 45 has the taper 33
Alternatively, a member without the cylindrical portion 73 and the taper 75 is used. Further, the water passage cover 13 as a cover in this embodiment is a cover equivalent to the water passage cover 13 of the above-described fourth embodiment, that is, the passage is provided only in the vicinity of the periphery as shown in FIG. A water hole 13a is formed.

The funnel-shaped slope 8 formed integrally with the lid frame 81
The upper part 3 is formed continuously with the upper opening 47 of the lid frame 81. Then, it extends obliquely in the center direction and downward from the inner peripheral wall near the upper opening 47. The funnel-shaped slope 83 of this embodiment is located immediately below the water hole 13a of the water cover 13 like the taper 75 of the fourth embodiment, and is not continuous in the circumferential direction. 85 are formed intermittently (see FIG. 6), and funnel-shaped slopes 83 are formed at two locations facing each other, and are provided corresponding to the water holes 13a, respectively. The edge serving as the lower end edge of the funnel-shaped slope 83 has an inner diameter D8 smaller than the inner diameter of the inspection tube 7.

Therefore, according to the structure of the rainwater basin of this embodiment, the same effect as that of the structure of the rainwater basin of the above-described fourth embodiment can be obtained. A funnel-shaped slope 83 for guiding rainwater flowing from the hole 13a to the inspection cylinder 7 is formed integrally, and the funnel-shaped slope 83 is formed.
Is not formed in the lid frame 81 except for the portion immediately below the water passage hole 13a, so that a configuration in which the hinge portion 70 connecting the lid 13 and the lid frame 81 does not interfere can be obtained.

[0055]

As described above in detail, according to the structure of the rainwater basin according to the first aspect of the present invention, the lower end of the lid frame is placed and fixed on the upper surface, and the upper end of the inspection tube is loosely fitted on the lower surface side. The base has an annular pedestal, and the inner periphery of the pedestal is formed with a taper that connects a large-diameter opening on the upper surface substantially equal to the inner diameter of the lid frame and a small-diameter opening on the lower surface smaller than the inner diameter of the inspection tube. In addition, a road surface load that is transmitted to the box body through the lid frame can be cut off, and the box body made of a synthetic resin can be used even in a place where the road surface load is applied. And, by providing the inner peripheral surface of the pedestal with a taper, all of the rainwater that has flowed into the lid frame from the lid can flow into the box body.

As a result, it is possible to prevent rainwater from flowing out from the gap between the pedestal and the inspection lid, and to prevent the foundation supporting the pedestal from being softened.

Further, since the base itself is tapered, there is no need to provide a separate funnel or the like, and the number of parts does not need to be increased. As a result, a highly reliable, inexpensive and easy-to-install rainwater basin structure can be provided.

Further, according to the structure of the rainwater basin of claim 2,
By providing a taper on the pedestal, rainwater that has flowed into the lid frame from the lid will be guided to the basin body,
If the water hole formed in the lid is not provided on the entire surface of the lid, but is only drilled in a part of the peripheral part of the lid, etc. It is guided to the main body, thereby preventing rainwater from flowing out from the gap between the pedestal and the inspection tube, and the foundation supporting the pedestal is not softened. Furthermore, since the pedestal itself is formed with a taper, there is no need to provide a separate funnel or the like, and the number of parts is not increased, thereby suppressing an increase in product cost and facilitating construction and maintenance. Become. In addition, since the inner peripheral edge portion of the pedestal except for the portion directly below the water hole is not formed with a taper, a configuration is obtained in which the hinge portion connecting the lid and the lid frame does not interfere, that is, the lid frame has On the other hand, the present invention can be applied to a rainwater basin forming a lid connected by a hinge.

Further, in the structure of the rainwater basin according to the third aspect, the cylindrical portion provided on the pedestal is configured to fit into the lower end of the lid frame, so that the positioning of the lid frame with respect to the pedestal is facilitated and the lid and the lid are fixed. Since the distance to the taper is reduced, the inflow of rainwater becomes more reliable, that is, it is possible to improve the prevention of rainwater from flowing out from the gap between the pedestal and the inspection tube.

Further, according to the structure of the rainwater basin of claim 4,
Since the funnel is formed integrally with the inner peripheral wall of the lid frame, the rainwater that has passed through the lid is immediately guided to the inspection tube by the funnel. Therefore, rainwater does not fall along the inner wall of the lid frame, and rainwater does not pass through the lower end portion of the lid frame, which is the connection between the lid frame and the pedestal. This prevents rainwater from flowing out of the connection between the lid frame and the pedestal, and also makes the waterproof seal of the portion simple.

Further, since the lower end of the funnel portion can be hung down and loosely fitted on the inner diameter side of the inspection tube, rainwater can be more reliably introduced into the inspection tube, and such a loose fitting structure can be used. Then, the alignment between the lid frame and the inspection cylinder at the time of installation becomes easy and reliable.

Further, according to the structure of the rainwater basin of the fifth aspect, in addition to the effect of the structure of the rainwater basin of the fourth aspect, the funnel-shaped slope integrally formed on the inner peripheral wall of the lid frame is formed by the funnel-shaped slope. Since the configuration is not formed on the inner peripheral wall except for the portion immediately below the water hole formed near the peripheral edge, it is possible to obtain a configuration in which the hinge connecting the lid and the lid frame does not interfere.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of the structure of a rainwater basin according to the present invention.

FIG. 2 is a sectional view showing a second embodiment of the structure of the rainwater basin according to the present invention.

FIG. 3 is a sectional view showing a third embodiment of the structure of a rainwater basin according to the present invention.

FIG. 4 is a sectional view showing a fourth embodiment of the structure of a rainwater basin according to the present invention.

FIG. 5 is a sectional view showing a fifth embodiment of the structure of a rainwater basin according to the present invention.

FIG. 6 is a schematic plan view of a lid and a lid frame in fourth and fifth embodiments of the structure of a rainwater basin according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Masu main body 7 ... Inspection cylinder 13 ... Lid (water-flow lid) 15, 41, 61, 81 ... Lid frame 17, 45, 71 ... Pedestal 29 ... Large diameter opening 31 ... Small diameter opening 33, 75 ... Taper 43, 61 ... funnel part 47 ... upper large diameter opening 49 ... lower small diameter opening 73 ... tube part 83 ... funnel-shaped slope D2 ... inner diameter of lid frame d2 ... inner diameter of inspection cylinder

Claims (5)

[Claims] 1. An inspection tube connected to an upper part of a basin body buried in the ground and communicating with the inside of the basin body and having an upper end opened, and a water hole formed substantially flush with the ground surface. A vertically cylindrical lid frame which is provided with an openable and closable lid at an upper end opening portion, and a lower end of the lid frame is buried and supported in the ground, and the lower end of the lid frame is placed and fixed on the upper surface, and the upper end of the inspection tube is loosely fitted on the lower surface side. A rainwater basin having an annular pedestal having a large diameter opening on the upper surface side substantially equal to the inner diameter of the lid frame and a smaller diameter on the lower surface side smaller than the inner diameter of the inspection cylinder, on the inner peripheral surface of the pedestal. A structure of a rainwater basin, characterized by forming a taper that makes the opening continuous. 2. An inspection tube connected to an upper part of a basin body buried in the ground and communicating with the inside of the basin body and having an open upper end, and a water hole formed substantially flush with the ground surface. A vertically cylindrical lid frame which is provided with an openable and closable lid at an upper end opening portion, and a lower end of the lid frame is buried and supported in the ground, and the lower end of the lid frame is placed and fixed on the upper surface, and the upper end of the inspection tube is loosely fitted on the lower surface side. An annular pedestal having a structure of a rainwater basin, which is located immediately below a water hole formed at least in the vicinity of the peripheral edge of the lid, and is located in a center direction and downward from an inner peripheral edge of the pedestal. Wherein the taper is formed integrally with the pedestal. 3. The rainwater basin according to claim 1, wherein the pedestal has a tubular portion fitted into a lower end of the lid frame, and the taper is formed at an upper end of the tubular portion. . 4. An inspection tube connected to an upper part of a basin body buried in the ground and communicating with the inside of the basin body and having an open upper end, and a water hole formed substantially flush with the ground surface. A vertically cylindrical lid frame which is provided with an openable and closable lid at an upper end opening portion, and a lower end of the lid frame is buried and supported in the ground, and the lower end of the lid frame is placed and fixed on the upper surface, and the upper end of the inspection tube is loosely fitted on the lower surface side. A rainwater basin having an annular pedestal having an upper large-diameter opening substantially equal to the inner diameter of the lid frame and a lower small-diameter opening smaller than the inner diameter of the check cylinder on the inner peripheral wall of the lid frame. The structure of the rainwater basin, wherein the funnel part to be formed is integrally formed. 5. An inspection tube which is connected to an upper part of a basin body buried in the ground and communicates with the inside of the basin body and has an open upper end, and a water hole disposed substantially flush with the ground surface. A vertically cylindrical lid frame which is provided with an openable and closable lid at an upper end opening portion, and a lower end of the lid frame is buried and supported in the ground, and the lower end of the lid frame is placed and fixed on the upper surface, and the upper end of the inspection tube is loosely fitted on the lower surface side. An annular pedestal having a structure of a rainwater basin, which is located immediately below a water hole formed at least in the vicinity of the periphery of the lid, and is located in a center direction and downward from an inner peripheral wall of the lid frame. A funnel-shaped slope extending to the lid frame is formed integrally with the lid frame.