JP6780980B2 - Drainage lid - Google Patents

Description

The present invention relates to a drainage lid attached to a drainage facility.

Conventionally, it has been known that a lid having a pressure release function is provided in a drainage facility such as a manhole or a rainwater storage tank (see, for example, Patent Documents 1 and 2). By providing a lid having a pressure release function, when the internal pressure of the drainage facility becomes high, the pressure can be released by opening a part or all of the lid. As a result, it is possible to prevent the internal pressure of the drainage facility from increasing, and the internal pressure can be adjusted to a predetermined pressure or less. Therefore, it is possible to prevent the occurrence of backflow and damage to the drainage facility.

Patent Document 1 describes a manhole cover having a pressure release function. This lid has a lid main body having an exhaust hole formed in a central portion and an exhaust valve attached to the exhaust hole. In the lid described in Patent Document 1, when the internal pressure of the manhole becomes high, the exhaust valve is pushed upward by the internal pressure, and the exhaust hole is opened.

Patent Document 2 describes a lid provided at the inspection port of the storage tank. This lid includes a lid frame fixed to the inspection port and a lid body fitted in the lid frame. When the internal pressure of the storage tank becomes high, the lid body is pushed upward by the internal pressure and is configured to be lifted from the lid frame. In the lid described in Patent Document 2, when the internal pressure of the storage tank becomes high, the lid main body rises from the lid frame, so that the inspection port is opened.

Jikkensho 59-34617 Japanese Patent No. 5513021

By the way, in recent years, heavy rainfall locally, that is, torrential rain has become a problem. During torrential rain, a large amount of rainwater temporarily flows through the drainage facility, so part of the rainwater must be forcibly discharged from the inspection port to prevent rainwater from leaking from unintended locations or damaging the drainage facility. In some cases. In such a case, according to the lid having the pressure release function, rainwater can be discharged to the outside in the same manner as the operation of releasing the pressure.

However, in the lid described in Patent Document 1, the exhaust hole is formed only in the central portion of the lid, and the opening area of the exhaust hole is small. Only a part of the lid body is opened. Therefore, there is a problem that the amount of rainwater that can be discharged is small when rainwater must be discharged during torrential rain.

With the lid described in Patent Document 2, since the inspection port is opened, a large amount of rainwater can be discharged during a torrential rain. However, even when the internal pressure is released except during torrential rain, the entire lid body must be levitated in order to open the entire inspection port. Therefore, there is a problem that the internal pressure cannot be released unless the internal pressure becomes considerably high, and fine pressure adjustment cannot be performed. The above-mentioned problem is not limited to rainwater equipment during torrential rain, but is also a problem that occurs in other drainage facilities where water may have to be forcibly discharged from the inspection port.

The present invention has been made in view of this point, and an object of the present invention is to provide a lid for a drainage facility capable of finely adjusting the pressure of the drainage facility and discharging a large amount of drainage from the inspection port of the drainage facility. It is to be.

The lid for drainage equipment according to the present invention has a lid frame fixed to an inspection port of the drainage equipment and a lid having an exhaust hole formed therein and mounted on the lid frame so as to be detachably attached to the lid frame. It includes a main body and an exhaust valve mounted on the lid main body so as to openably cover the exhaust hole. The lid main body has a main body portion in which the exhaust hole is formed, and a stopper that prevents the lid main body from scattering by engaging with the lid frame when the main body portion rises from the lid frame. doing.

According to the lid for the drainage facility, when the internal pressure of the drainage facility increases, the exhaust valve mounted on the lid body is lifted upward by the internal pressure. As a result, the exhaust hole of the lid body is opened, and the internal pressure of the drainage facility is prevented from increasing. Since it is not necessary to levitate the entire lid body when releasing the internal pressure, fine pressure adjustment is possible. On the other hand, for example, when a part of rainwater rises to the inspection port during torrential rain, the lid body placed on the lid frame is lifted upward by the rainwater. As a result, the inspection port (strictly speaking, the opening of the lid frame) is opened, and rainwater can be discharged from the inspection port. Therefore, it is possible to discharge a large amount of rainwater that cannot be completely discharged from the exhaust hole alone. The inspection port is opened when the lid body floats, but the stopper engages with the lid frame to prevent the lid body from scattering. When the rainwater has been discharged, the lid body is lowered by its own weight and the inspection port is closed. As described above, according to the lid for the drainage facility, it is possible to finely adjust the pressure of the drainage facility and to discharge a large amount of drainage from the inspection port.

According to a preferred embodiment of the present invention, the weight of the exhaust valve is smaller than the weight of the lid body.

According to the above aspect, since the exhaust valve is easier to float than the lid body, it is possible to finely adjust the pressure of the drainage facility.

According to another preferred aspect of the present invention, the plan view area of the lid body is larger than the plan view area of the exhaust valve.

According to the above aspect, when the lid body is lifted by the drainage, more drainage can be discharged.

According to another preferred embodiment of the present invention, the exhaust valve has a valve body portion formed in a circular shape in a plan view. The main body portion of the lid main body has an annular portion that surrounds the valve body portion in a plan view. The "circle" in "formed into a circle" is not limited to a perfect circle, but also includes an oval or the like. Further, "formed in a circular shape" is sufficient as long as it is formed in a substantially circular shape, and for example, unevenness may be provided on the outer peripheral edge.

For example, when draining rainwater from the inspection port during torrential rain, the exhaust valve first floats, and then the lid body floats with the exhaust valve floating. According to the above aspect, the exhaust valve and the lid body have an even weight balance without bias. Therefore, when the lid body floats while the exhaust valve is floating, the lid body is unlikely to tilt. Therefore, since the lid body tends to rise straight, drainage can be discharged satisfactorily.

According to another preferred aspect of the present invention, the radially inner portion of the annular portion of the main body portion of the lid main body has a concave portion recessed downward. The valve body portion of the exhaust valve is configured to fit into the recess. When the valve body portion is fitted in the recess, the upper surface of the lid body and the upper surface of the exhaust valve are substantially flush with each other.

According to the above aspect, by arranging the upper surface of the lid body flush with the ground, the exhaust valve, the lid body, and the ground when the exhaust valve is fitted in the recess can be arranged flush with each other. .. That is, the lid and the ground when the exhaust valve is closed can be arranged flush with each other.

According to another preferred embodiment of the present invention, the main body portion of the lid main body connects a tubular portion arranged inside the annular portion in the radial direction, and the tubular portion and the annular portion. It has a bridging part. The exhaust hole is partitioned by the tubular portion, the annular portion, and the bridging portion. When the exhaust valve is fixed and floats on a shaft portion extending downward from the valve body portion and slidably inserted into the tubular portion and a portion of the shaft portion below the tubular portion. It has a valve stopper that comes into contact with the lower end of the tubular portion.

According to the above aspect, it is possible to obtain a suitable form of a drainage facility lid capable of finely adjusting the pressure of the drainage facility and discharging a large amount of drainage from the inspection port.

According to another preferred aspect of the present invention, the lid frame has a tubular portion and an engaged portion that projects radially inward from the tubular portion. The stopper has a vertical portion extending downward from the main body portion and projects radially outward from the vertical portion below the engaged portion, and when the lid main body rises from the lid frame, the stopper is engaged. It has an engaging portion that engages with the joint portion.

According to the above aspect, when the lid body is lifted by drainage, the engaging portion of the stopper engages with the engaged portion of the lid frame, so that the lid body can be prevented from scattering.

According to the present invention, it is possible to provide a lid for a drainage facility capable of finely adjusting the pressure of the drainage facility and discharging a large amount of drainage from the inspection port of the drainage facility.

It is a side view of a rainwater facility. It is a top view of the rainwater equipment. It is sectional drawing of a lid and an inspection cylinder. It is a top view of the main body part of a lid main body. It is a side view of a lid. It is a back view of the lid. It is a top view of the lid. It is sectional drawing of the lid and the inspection cylinder when the exhaust valve is open. It is sectional drawing of the lid and the inspection cylinder when the exhaust valve and the lid body are open.

Hereinafter, an embodiment of the present invention will be described. FIG. 1 is a side view of the rainwater facility 1, and FIG. 2 is a plan view of the rainwater facility 1. The rainwater facility 1 according to the present embodiment is buried in the ground. However, the rainwater facility 1 is not limited to the one buried in the ground, and a part or all of the rainwater facility 1 may be installed on the ground.

The rainwater equipment 1 includes a first pipe 21, a 20 connected to the first pipe 21, a second pipe 4 connected to the 20th pipe, a rainwater storage tank 3 connected to the second pipe 4, and rainwater. It is provided with a third pipe 6 connected to the storage tank 3. The third pipe 6 is connected to the side groove 60. The rainwater storage tank 3 has a tank body 2 and an inspection cylinder 5. The first pipe 21 is a pipe that guides rainwater toward 20 more. The second pipe 4 is a pipe that guides the rainwater discharged from the 20 to the rainwater storage tank 3. The third pipe 6 is a pipe that guides rainwater from the rainwater storage tank 3 toward the gutter 60.

An inspection port 11 is formed at the upper part of the 20. An inspection port 11 is also formed above the inspection cylinder 5 of the rainwater storage tank 3. The inspection port 11 is open upward. A lid (hereinafter, simply referred to as a lid) 10 for rainwater equipment according to the present embodiment is provided at the inspection port 11 of the 20th inspection port 11 and the inspection port 11 of the inspection tube 5 of the rainwater storage tank 3. The lid 10 is provided only on one of the inspection port 11 of the 20th and the inspection port 11 of the inspection cylinder 5 of the rainwater storage tank 3, and the other is provided with a lid having no pressure release function. May be good.

Next, the details of the lid 10 will be described. Here, the lid 10 provided at the inspection port 11 of the inspection cylinder 5 of the rainwater storage tank 3 will be described. As shown in FIG. 3, the lid 10 includes a lid frame 12 fixed to the inspection port 11, a lid body 15 that is detachably attached to the lid frame 12 by being placed on the lid frame 12, and a lid body. It is provided with an exhaust valve 14 mounted on the 15.

The lid main body 15 has a main body portion 13 and a stopper 16. Here, the main body 13 and the stopper 16 are separate bodies, and the stopper 16 is attached to the main body 13. However, the main body 13 and the stopper 16 are not limited to separate bodies, and may be an integral body. Although the lid body 15 is fitted to the lid frame 12 via the sealing material 17, it is only placed on the lid frame 12 and is not fixed by adhesion or the like.

FIG. 4 is a plan view of the main body 13. The main body portion 13 connects the annular portion 13A formed in an annular shape in a plan view, the tubular portion 13B arranged radially inside the annular portion 13A, and the tubular portion 13B and the annular portion 13A. It has a part 13C. The bridging portion 13C is formed in a rod shape extending in the radial direction. The number of the bridging portions 13C is not particularly limited, but is preferably a plurality. Here, four bridging portions 13C are provided.

A hole 13a into which the stopper 16 is fitted is formed in the annular portion 13A. Here, two holes 13a are formed in the annular portion 13A. The two holes 13a are arranged at point-symmetrical positions with respect to the center C of the main body 13 (the center of the main body 13 is also the center of the exhaust valve 14 and the center of the lid 10). There is. However, the arrangement of the holes 13a is not particularly limited. Further, the number of holes 13a may be the same as the number of stoppers 16, and is not limited to two. The number of holes 13a may be one or three or more.

An exhaust hole 13b is formed inside the annular portion 13A. Here, four exhaust holes 13b are formed. However, the number of exhaust holes 13b is not limited to 4. The number of exhaust holes 13b may be 1 to 3, or 5 or more. The exhaust hole 13b is partitioned by an annular portion 13A, a tubular portion 13B, and a bridging portion 13C. An insertion hole 13c is formed in the tubular portion 13B.

As shown in FIG. 3, a recess 13d into which the exhaust valve 14 is fitted is formed in the central portion of the annular portion 13A. That is, the portion of the main body 13 on the inner side in the radial direction of the annular portion 13A has a recess 13d. By fitting the exhaust valve 14 into the recess 13d, the upper surface of the exhaust valve 14 and the upper surface of the lid body 15 and the ground are substantially flush with each other. An inclined surface 13e that is inclined downward toward the center is formed on the peripheral edge of the recess 13d. A sealing material 17 is attached to the outer peripheral surface of the annular portion 13A.

The stopper 16 has a head portion 16A fitted in the hole 13a of the annular portion 13A, and a shaft portion 16B located below the head portion 16A. A sealing material 18 is attached to the outer peripheral surface of the head portion 16A. The shaft portion 16B has a vertical portion 16a extending downward from the head portion 16A and an engaging portion 16b extending radially outward from the vertical portion 16a.

The lid frame 12 is fixed to the inspection cylinder 5. The lid frame 12 may be adhered to, for example, the inspection cylinder 5. The lid frame 12 may have an adhesive portion adhered to the inspection cylinder 5. The configuration for fixing the lid frame 12 to the inspection cylinder 5 is not limited at all. The lid frame 12 has a support portion 12a that supports the lid body 13. Here, the support portion 12a is composed of a flat surface that supports the lower surface of the outer peripheral portion of the lid main body 13.

The lid frame 12 has a tubular portion 12b and an engaged portion 12c protruding inward in the radial direction from the tubular portion 12b. Here, the engaged portion 12c is formed in a ring shape. The radial outer end of the engaging portion 16b of the stopper 16 is located radially outside the radial inner end of the engaged portion 12c of the lid frame 12. In a plan view, the engaged portion 12c and the engaging portion 16b partially overlap each other. FIG. 5 is a side view of the lid 10, and FIG. 6 is a back view of the lid 10. As shown in FIG. 6, when viewed from below, the engaged portion 12c and the engaging portion 16b partially overlap each other. Therefore, when the lid main body 15 moves upward, the engaging portion 16b of the stopper 16 and the engaged portion 12c of the lid frame 12 come into contact with each other, and the upward movement of the lid main body 15 is restricted.

As shown in FIG. 3, the exhaust valve 14 includes a valve body portion 14A located above the exhaust hole 13b, a shaft portion 14B extending downward from the valve body portion 14A, and a valve fixed to the lower end portion of the shaft portion 14B. It has a stopper 14C. The shaft portion 14B is slidably inserted into the insertion hole 13c of the tubular portion 13B of the lid main body 13.

As shown in FIG. 7, the valve body portion 14A is formed in a circular shape in a plan view. In a plan view, the valve body portion 14A is surrounded by the annular portion 13A of the lid body 15. As shown in FIG. 3, the side surface of the valve body portion 14A is inclined toward the center side toward the lower side. A sealing material 19 is provided on the side surface of the valve body portion 14A.

The valve stopper 14C is fixed to a portion of the shaft portion 14B below the tubular portion 13B. The radial outer end of the valve stopper 14C is located radially outside the inner peripheral surface of the insertion hole 13c of the tubular portion 13B. In a plan view, the tubular portion 13B and the valve stopper 14C partially overlap each other. Therefore, when the exhaust valve 14 moves upward with respect to the lid main body 15, the valve stopper 14C and the tubular portion 13B come into contact with each other, and the upward movement of the exhaust valve 14 is restricted.

The materials of the lid frame 12, the main body 13 and the stopper 16 of the lid main body 15, and the exhaust valve 14 are not limited in any way. For example, it may be a synthetic resin such as vinyl chloride.

The weight of the exhaust valve 14 is smaller than the weight of the lid body 15. As shown in FIG. 7, the plan view area of the lid body 15 is larger than the plan view area of the exhaust valve 14.

The above is the configuration of the lid 10. Although the description is omitted, the configuration of the lid 10 provided at the inspection port 11 of 20 is the same. The lid 10 has a function of releasing the internal pressure of the rainwater facility 1 when the internal pressure becomes high, and a function of discharging a part of the rainwater when a large amount of rainwater flows into the rainwater facility 1 during a torrential rain. And have. Next, the pressure release operation and the rainwater discharge operation of the lid 10 will be described by taking the lid 10 provided on the inspection cylinder 5 of the rainwater storage tank 3 as an example.

When the internal pressure (air pressure) of the rainwater storage tank 3 becomes high, pressure is applied to the lid 10 from the lower side to the upper side. When the pressure becomes equal to or higher than a predetermined pressure (hereinafter referred to as the first pressure), the exhaust valve 14 floats due to the pressure, as shown in FIG. Then, the exhaust hole 13b (see FIG. 4) blocked by the exhaust valve 14 is opened. As a result, a part of the internal air of the rainwater storage tank 3 is released to the outside through the exhaust hole 13b, and the internal pressure of the rainwater storage tank 3 decreases. Therefore, it is possible to prevent the internal pressure of the rainwater storage tank 3 from becoming excessively high. Since the exhaust valve 14 includes the valve stopper 14C, it is prevented from coming off from the lid main body 15. When the internal pressure of the rainwater storage tank 3 becomes less than the first pressure, the exhaust valve 14 is lowered by its own weight and placed on the lid main body 15. Then, the exhaust hole 13b is closed by the exhaust valve 14, and the rainwater storage tank 3 is sealed. When the internal pressure of the rainwater storage tank 3 increases again, the same operation is repeated. As a result, the internal pressure of the rainwater storage tank 3 is adjusted to less than the first pressure.

During a torrential rain, a large amount of rainwater may flow into the rainwater facility 1 and the rainwater storage tank 3 may overflow. In such a case, rainwater rises in the inspection cylinder 5, and the rainwater exerts an upward pressure on the lid 10. When the pressure applied to the lid 10 becomes equal to or higher than the first pressure, the exhaust valve 14 rises from the lid main body 15 and the exhaust hole 13b is opened (see FIG. 8). Rainwater is discharged to the outside of the rainwater storage tank 3 through the exhaust hole 13b.

When the amount of rainwater overflowing from the rainwater storage tank 3 is large, a sufficient amount of rainwater cannot be discharged only by the exhaust hole 13b, and further pressure is applied to the lid 10. When a pressure larger than the first pressure (hereinafter referred to as the second pressure) is applied to the lid 10, the lid main body 15 rises from the lid frame 12 and the inspection port 11 is opened, as shown in FIG. Since the lid frame 12 is fixed to the inspection port 11, when the lid main body 15 rises from the lid frame 12, strictly speaking, the inside of the lid frame 12 is opened. However, in the present specification, the opening of the inside of the lid frame 12 in this way is referred to as "the inspection port 11 is opened". Since the second pressure is larger than the first pressure, the lid main body 15 floats from the lid frame 12 with the exhaust valve 14 floating from the lid main body 15. When the lid body 15 floats from the lid frame 12, rainwater is discharged to the outside of the rainwater storage tank 3 through the exhaust hole 13b and the gap between the lid body 15 and the lid frame 12. Therefore, the amount of rainwater discharged increases. After the lid body 15 floats, the engaging portion 16b of the stopper 16 and the engaged portion 12c of the lid frame 12 engage with each other to prevent the lid body 15 from further rising. Therefore, the lid body 15 does not scatter from the lid frame 12. Further, the lid body 15 is maintained at a position above the lid frame 12. When the rainwater is sufficiently discharged and the pressure applied to the lid 10 becomes smaller than the second pressure, the lid body 15 is placed on the lid frame 12 by its own weight, and the inspection port 11 is closed. Further, when the pressure applied to the lid 10 becomes smaller than the first pressure, the exhaust valve 14 is placed on the lid main body 15 and the exhaust hole 13b is closed.

As described above, according to the lid 10 according to the present embodiment, when the internal pressure of the rainwater equipment 1 increases, the exhaust valve 14 is lifted upward by the internal pressure. As a result, the exhaust hole 13b is opened, and it is possible to prevent the internal pressure of the rainwater facility 1 from becoming excessively high. According to the lid 10 according to the present embodiment, it is not necessary to levitate the lid main body 15 when releasing the internal pressure of the rainwater equipment 1. By floating the exhaust valve 14, which is lighter than the lid body 15, the air in the rainwater equipment 1 can be released to the outside. Therefore, it is possible to finely adjust the pressure of the rainwater equipment 1. On the other hand, when rainwater rises to the inspection port 11 during torrential rain, a part of the rainwater can be discharged to the outside of the rainwater facility 1 through the exhaust hole 13b by floating the exhaust valve 14. Further, when the rainwater cannot be completely discharged only from the exhaust hole 13b, the lid main body 15 rises from the lid frame 12 and the inspection port 11 is opened. Therefore, in addition to the exhaust hole 13b, a part of rainwater can be discharged from the gap between the lid main body 15 and the lid frame 12. Therefore, the amount of rainwater discharged can be increased. According to the lid 10 according to the present embodiment, it is possible to discharge a large amount of rainwater that cannot be completely discharged only by the exhaust holes 13b during a torrential rain. As described above, according to the lid 10 according to the present embodiment, it is possible to finely adjust the pressure of the rainwater facility 1 and to discharge a large amount of rainwater during a concentrated heavy rain.

Further, according to the lid 10 according to the present embodiment, the amount of rainwater discharged can be adjusted in two stages according to the amount of rainwater overflowing from the rainwater facility 1. Therefore, rainwater can be suitably discharged during concentrated heavy rain.

In the lid 10 according to the present embodiment, the exhaust hole 13b is opened by the floating of the exhaust valve 14, but when the exhaust valve 14 floats by a predetermined amount, the valve stopper 14C comes into contact with the tubular portion 13B of the lid main body 15. .. Therefore, the exhaust valve 14 does not come off from the lid body 15. Therefore, after the air or rainwater inside the rainwater equipment 1 is discharged from the exhaust hole 13b, the exhaust valve 14 is placed on the lid main body 15 by its own weight, and the exhaust hole 13b is closed.

Further, the inspection port 11 is opened when the lid body 15 floats from the lid frame 12, but when the lid body 15 rises by a predetermined amount or more, the stopper 16 engages with the lid frame 12. Therefore, the lid body 15 does not come off from the position above the lid frame 12. Therefore, after the rainwater is discharged from the inspection port 11, the lid body 15 is placed on the lid frame 12 by its own weight, and the inspection port 11 is closed.

The plan-view area of the lid body 15 may be smaller or equal to the plan-view area of the exhaust valve 14, but in the present embodiment, it is larger than the plan-view area of the exhaust valve 14. Therefore, when the lid body 15 is lifted by rainwater, more rainwater can be discharged. More rainwater can be discharged during torrential rains.

In the lid 10 according to the present embodiment, the exhaust valve 14 has a valve body portion 14A formed in a circular shape in a plan view, and the lid body 15 has an annular portion 13A surrounding the valve body portion 14A in a plan view. ing. The exhaust valve 14 and the lid main body 15 have an even weight balance without bias. Therefore, when the lid body 15 floats from the lid frame 12 with the exhaust valve 14 floating, the lid body 15 is unlikely to tilt. Therefore, since the lid body 15 tends to float straight, rainwater can be discharged satisfactorily.

Although one embodiment of the present invention has been described above, it goes without saying that the embodiment of the present invention is not limited to the above-described embodiment. The present invention can be implemented in various forms. Next, other embodiments will be briefly described.

The lid 10 according to the embodiment is provided on the inspection cylinder 5 or the stile 10 of the rainwater storage tank 3. However, the application target of the lid according to the present invention is not limited to the rainwater storage tank 3 and the rainwater storage tank 3. The lid according to the present invention can be applied to any rainwater equipment. Further, the lid according to the present invention can be applied not only to rainwater equipment but also to other drainage equipment such as sewage equipment that discharges sewage.

In the above embodiment, the lid 10 is installed at the same height as the ground surface. However, the installation height of the lid 10 is not limited at all. The lid 10 may be provided on an inspection cylinder or the like installed on the ground, or may be installed underground. The lid 10 may be arranged at a position higher than the ground surface, or may be arranged at a position lower than the ground surface.

The number of exhaust valves 14 is not limited to one. The lid according to the present invention may include a plurality of exhaust valves.

The positions of the exhaust hole 13b and the exhaust valve 14 are not limited to the central portion of the lid body 13 in a plan view. The exhaust hole 13b is not limited to a hole whose circumference is closed. For example, the exhaust hole 13b and the exhaust valve 14 may be provided at the outer end portion of the lid body 13 in the radial direction in a plan view. The exhaust hole 13b may be a hole having a part around it.

The exhaust valve 14 is not limited to a valve that slides up and down. The exhaust valve 14 may be, for example, a leaf spring type valve whose one end is fixed to the lid body 15.

The shape of the bridging portion 13C of the lid body 13 is not limited to the rod shape. As the shape of the bridging portion 13C, an arbitrary shape capable of connecting the annular portion 13A and the tubular portion 13B can be adopted.

In the above embodiment, the lid frame 12 is separate from the inspection cylinder 5 and is fixed to the inspection cylinder 5. However, the lid frame 12 may be integrated with the inspection cylinder 5. A part of the inspection cylinder 5 may also serve as the lid frame 12. A part of the rainwater facility 1 may also serve as the lid frame 12.

1 Rainwater equipment 2 Rainwater storage tank 5 Inspection cylinder 10 Lid 11 Inspection port 12 Lid frame 12c Engagement part 13 Main body part 13A Ring part 13B Cylindrical part 13C Bridge part 13b Exhaust hole 14 Exhaust valve 14A Valve body part 14B Shaft part 14C valve stopper 15 lid body 16 stopper 16b engaging part

Claims (7)

The lid frame fixed to the inspection port of the drainage facility and
An exhaust hole is formed, and the lid body is detachably attached to the lid frame by being placed on the lid frame.
An exhaust valve mounted on the lid body so as to cover the exhaust hole so as to be openable and closable.
The lid main body has a main body portion in which the exhaust hole is formed, and a stopper that prevents the lid main body from scattering by engaging with the lid frame when the main body portion rises from the lid frame. The lid for the drainage facility. The lid for drainage equipment according to claim 1, wherein the weight of the exhaust valve is smaller than the weight of the lid body. The lid for drainage equipment according to claim 1 or 2, wherein the plan view area of the lid body is larger than the plan view area of the exhaust valve. The exhaust valve has a valve body portion formed in a circular shape in a plan view, and has a valve body portion.
The lid for a drainage facility according to any one of claims 1 to 3, wherein the main body portion of the lid main body has an annular portion surrounding the periphery of the valve body portion in a plan view. Of the main body portion of the lid main body, the radially inner portion of the annular portion has a concave portion recessed downward.
The valve body portion of the exhaust valve is configured to fit into the recess.
The drainage according to claim 4, wherein the upper surface of the lid body and the upper surface of the exhaust valve are substantially flush with each other when the valve body portion is fitted in the recess. Equipment lid. The main body portion of the lid main body has a tubular portion arranged inside the annular portion in the radial direction, and a bridging portion connecting the tubular portion and the annular portion.
The exhaust hole is partitioned by the tubular portion, the annular portion, and the bridging portion.
When the exhaust valve is fixed and floats on a shaft portion extending downward from the valve body portion and slidably inserted into the tubular portion and a portion of the shaft portion below the tubular portion. The lid for a drainage facility according to claim 4 or 5, further comprising a valve stopper that comes into contact with the lower end of the tubular portion. The lid frame has a tubular portion and an engaged portion that projects radially inward from the tubular portion.
The stopper has a vertical portion extending downward from the main body portion and projects radially outward from the vertical portion below the engaged portion, and when the lid main body rises from the lid frame, the stopper is engaged. The lid for a drainage facility according to any one of claims 1 to 6, which has an engaging portion that engages with the joint portion.

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