JP6817017B2 - lid - Google Patents

Description

The present invention relates to a lid used for a rainwater basin or the like attached to a rainwater storage and infiltration facility.

When a large amount of water flows into a rainwater storage infiltration facility or a rainwater basin due to heavy rain, etc., and the water pressure on the lower surface of the lid that closes the upper opening of the rainwater basin rises, the lid comes off from the rainwater basin, and the removed lid is washed away when flooded. was there. Various techniques have been developed to prevent such outflow of the lid.

For example, Patent Document 1 includes a lid body having a plurality of shaft holes and ventilation holes penetrating in the vertical direction, and a valve body that moves up and down so as to open and close the ventilation holes of the lid body through the shaft holes. , A manhole cover has been proposed in which a stopper portion for preventing the outflow of the valve body is provided at the lower end portion of the valve body inserted into the shaft hole. According to this lid, when the water pressure applied to the lower surface of the lid rises, the valve body can rise to release the water pressure, so that the lid is not washed away.

Further, Patent Document 2 includes a lid main body having a through hole penetrating in the vertical direction and a movable opening / closing lid that moves up and down so as to open and close the through hole of the lid main body. A pressure release lid for a drainage pipe is disclosed, which is provided with a locking claw portion at the lower end to prevent the movable opening / closing lid from flowing out. This lid also functions in the same manner as the lid described in Patent Document 1.

Japanese Patent No. 5337007 Japanese Patent No. 5704956

However, like the lids described in both of the above patent documents, if a valve body or a movable opening / closing lid is provided separately from the lid body, or a stopper portion or a locking claw portion is provided to restrict the upward movement of these lids. In addition to the complicated structure, it is also necessary to attach a valve body or the like provided with a stopper portion or the like to the lid body, which causes a problem that the manufacturing cost is high.

Therefore, the present invention has been made in view of the above-mentioned problems in the prior art, and an object of the present invention is to provide a lid having a low manufacturing cost and which is difficult to flow out from a rainwater basin or the like in the event of heavy rain or the like.

To achieve the above object, the present invention includes: a top view the circular lid body is disposed at a position spaced apart from each other in the lower surface near the edge of the lid body, a plurality of circles that removably attached to the lid body and a tubular member, a lid for closing the opening portion of the open hole by the cover body in a state where the the hole of the opening hole plurality of circular cylindrical member is disposed, the lower surface of the lid body in the case where water pressure is applied, together with the floats from the opening hole escape the water pressure from a gap of the opening and the lid body, a portion of the plurality of circular tubular member is an inner surface of the hole those when preventing withdrawal from the opening hole of the lid, the water pressure to the lid body is lowered in contact, with said plurality of circular tubular member is spaced apart from the inner surface of the front Kiana portion, said by its own weight The lid is lowered, and the lid body closes the opening of the opening hole.

According to the present invention, since the lid simply by arranging a plurality of circular cylindrical member at positions spaced apart from each other in the lower surface near the edge of the top view the circular lid body is less likely to flow out, configuration is simple, manufacturing The cost can be kept low. Further, by detachably attaching the plurality of cylindrical members to the lid body, the lid body and the cylindrical member can be stored or transported in a separated state, so that the storage / transport efficiency can be improved. Can be done.

The lid is made of plastic and can be used to close the upper opening of the rainwater basin connected to the rainwater storage infiltration tank buried in the ground.

As described above, according to the present invention, it is possible to provide a lid having a low manufacturing cost and which is difficult to flow out from a rainwater basin or the like in the event of heavy rain or the like.

An embodiment of the lid according to the present invention is shown, (a) is a front view, (b) is a top view, (c) is a bottom view, and (d) is a sectional view taken along line AA of (a). .. The rainwater basin to which the lid of FIG. 1 is attached is shown, (a) is a top view, and (b) is a sectional view taken along line BB of (a). A state in which the lid main body of FIG. 1 is attached to the rainwater basin of FIG. 2 is shown, (a) is a top view, and (b) is a sectional view taken along line CC of (a). It is the schematic sectional drawing which shows the installation example of the lid which concerns on this invention. FIG. 4 is a schematic cross-sectional view showing a state in which the water level in the rainwater basin rises and the lid floats. It is the schematic sectional drawing which shows the experimental apparatus of the lid which concerns on this invention.

Next, a mode for carrying out the present invention will be described in detail with reference to the drawings. In the following description, a case where the lid according to the present invention is used as a lid for a rainwater basin will be described.

FIG. 1 shows an embodiment of a lid according to the present invention, in which the lid 1 is made of a plastic material, has a lid body 1a, a ridge 1b formed on the lower edge of the lid body 1a, and a lower surface. It includes four convex portions 1c arranged near the edge portion, four pipes (cylindrical members) 1d attached to the convex portion 1c, and a handle 1e provided on the upper surface.

The lid body 1a is formed with a non-slip uneven pattern on the front surface, a large number of ribs on the back surface, and an outer diameter of about 300 mm. The convex portion 1c and the PVC pipe 1d are detachably connected by press fitting, screwing, or the like. The outer diameter, length, and mounting position of the pipe 1d will be described later.

A general rainwater basin to which the lid 1 is attached is shown in FIG. 2, and a state in which the lid 1 is attached to the rainwater basin 2 of FIG. 2 is shown in FIG. The rainwater basin 2 includes a main body 2a having an upper opening 2b, and a groove (lid frame) 2c formed on the upper edge of the main body 2a and engaging with the ridge 1b of the lid 1.

FIG. 4 shows an installation example of a rainwater basin 2 equipped with a lid 1 having the above configuration. The rainwater basin 2 is buried in the vicinity of the rainwater storage and infiltration facility 10, receives rainwater from a rain gutter or the like of a building through a pipe 11, and introduces the received rainwater into the rainwater storage and infiltration facility 10 via a pipe 12.

When heavy rain occurs, an amount of rainwater that exceeds the storage capacity of the rainwater basin 2 and the rainwater storage and infiltration facility 10 flows into them, and after the rainwater storage and infiltration facility 10 is full, it tries to overflow from the rainwater basin 2. When water pressure is applied to the lower surface of the lid 1 by rainwater, as shown in FIG. 5, the lid 1 rises from the rainwater basin 2, and is indicated by an arrow from the gap between the lid 1 and the rainwater basin 2 formed thereby. Rainwater flows out.

Here, since the lid 1 is provided with a plurality of pipes 1d near the edge of the lower surface, the lid 1 is lifted from the rainwater basin 2, and a horizontal force is applied by the flow of water W on the ground at the time of flooding. However, since the pipe 1d comes into contact with the inner peripheral surface of the main body 2a of the rainwater basin 2, the lid 1 is not washed away. Then, due to the outflow of rainwater from the gap between the lid 1 and the rainwater basin 2, the water pressure applied to the lower surface of the lid 1 decreases, and the lid 1 descends to a position where the upper opening 2b of the rainwater basin 2 is closed. Return.

In order to confirm the condition of the lid 1 when heavy rain occurs as described above, the experimental device shown in FIG. 6 was manufactured, and an experiment assuming heavy rain was carried out.

This experimental device 21 cuts the water tank 22 for storing tap water T and the rainwater basin 2 in the horizontal direction, and fits the lid 1 into the cylinder 23 having an outer diameter of 300 mm and a height of 300 mm. Along with being fixed to form a bottom surface, a vinyl chloride plate 24 for fixing the tubular body 23 to the inside of the water tank 22 via a weight 25 made of a concrete pillar, and tap water T to the tubular body 23 via a pipe 27. It is composed of a submersible pump 26 to be delivered. In addition, the name of each part of the cylinder 23 and its code are diverted from those of the rainwater basin 2.

As the submersible pump 26, a pump having a discharge rate of 180 l / min was used. This discharge amount assumes the flow of water during heavy rainfall with a roof area of 150 m ² and a rainfall intensity of 80 mm / hr.

In the above experimental device 21, a lid 1 (see FIG. 1 and the like) in which the outer diameter, length, and mounting position of the pipe 1d are set in various ways is attached to the cylinder 23, and the pump 26 is operated to apply water pressure to push up the lid 1. After the generation, tap water T was injected to submerge it. At this time, the water level was raised to 15 cm from the upper end of the cylinder 23. The situation when the pump 26 is stopped once and the pump 26 is operated again to apply water pressure to the lid 1 in the flooded state, and then when the pump 26 is stopped and the water pressure on the lid 1 is no longer generated in the flooded state. We confirmed each situation.

As a result of the above experiment, if the outer diameter of the pipe 1d of the lid 1 is 15 mm or more and the length is 90 mm or more, and the pipe 1d is installed inside the circle D (diameter 285 mm) shown by the alternate long and short dash line in FIG. 1 (c). It was confirmed that the lid 1 was only lifted and was not washed away, and when the water pressure decreased, the lid 1 was lowered by its own weight, and the upper opening 2b (see FIG. 2 and the like) of the tubular body 23 was closed.

The position where the pipe 1d is in contact with the circle D is such that when the pipe 1d is mounted outside the circle D, the pipe 1d is caught by the cylinder 23 and opens upward when the water pressure applied to the lid 1 is reduced in a flooded state. This is because it was confirmed that 2b could not be blocked.

In the above experiment, the lid 1 having the lid body 1a having an outer diameter of 300 mm was used, but even when the outer diameter of the lid body 1a is changed, the pipe 1d having a length of 90 mm or more is connected to the cylinder when the water pressure drops. By attaching it to a position in contact with a circle D (the diameter changes according to the outer diameter of the lid body 1a) having a diameter that does not get caught in 23, water pressure that pushes up the lid body 1a is generated and the lid 1 floats even if it is submerged. It has the same effect. Even if the outer diameter of the pipe 1d is 15 mm or less, there is no problem as long as the lid body 1a does not come off or break due to water pressure, etc. However, considering that a pipe with a large slenderness ratio increases the risk of breakage in handling, the outer diameter is 15 mm. Set to.

As described above, according to the present embodiment, the lid 1 is less likely to flow out simply by providing the convex portion 1c and the pipe 1d on the lid main body 1a, so that the manufacturing cost can be kept low. Further, since the pipe 1d can be removed from the convex portion 1c, the lid 1 can be stored or transported in a state where the lid main body 1a and the pipe 1d are separated, so that the storage / transport efficiency is improved.

In the above description, the case where the lid 1 according to the present invention is used for the rainwater basin 2 is illustrated, but it can also be applied to other containers, manholes, and the like. Further, the shape and material of the lid 1 and the pipe 1d can be changed in various ways, and the number of pipes 1d is not limited to four as long as it is plural .

1 Lid 1a Lid body 1b Protrusion 1c Convex 1d Pipe 1e Handle 2 Rainwater basin 2a Body 2b Upper opening 2c Groove 10 Rainwater storage and infiltration facility 11, 12 Piping 21 Experimental equipment 22 Water tank 23 Cylindrical body 24 PVC plate 25 Weight 26 Underwater Pump 27 Piping T Tap water W Water

Claims (2)

And viewed from the circular lid body is disposed at a position spaced apart from each other in the lower surface near the edge of the lid body, and a plurality of circular tubular member that is removably attached to the lid body, the opening hole a lid for closing the opening portion of the open hole by the cover body in a state where the plurality of circular tubular member is positioned in the hole,
When water pressure is applied to the lower surface of the lid body,
With escape the water pressure from a gap of the opening and the lid body floats up from the opening hole, from the opening hole of the lid portion of the plurality of circular tubular member is brought into contact with the inner surface of the hole Prevents withdrawal,
When the water pressure on the lid body drops,
Wherein with a plurality of circular tubular member is spaced apart from the inner surface of the front Kiana portion, the lid is lowered by its own weight, the lid, characterized in that the said lid body to close the opening of the aperture hole. A plastic lid as claimed in claim 1, characterized in that close the upper opening of the rainwater square connected to rainwater storage impregnation vessel that is buried in the ground.

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