JP2018062780A - Cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cover of a low manufacturing cost, that cannot easily be swept away from a gully or the like at a time of heavy rain.SOLUTION: There is provided a cover 1 that comprises a cover body 1a and a plurality of pipe members or rod members (pipes) 1d disposed on positions apart from each other in the vicinity of the underside edge part of the cover body and closes an opening part of an open hole with the cover body with the plurality of pipe members or rod members in a state of being disposed in the hole part of the open hole. The cover floats upward from the open hole to release water pressure through a gap between the cover body and the opening part and is prevented from detaching from the open hole by some of the plurality of pipe members or rod members abutting on the inner face of the hole part when water pressure is applied to the underside of the cover body, and descends by its own weight to close the opening part of the open hole with the cover body with some of the plurality of pipe members or rod members separating from the inner face of the hole part when the water pressure applied to the cover body decreases.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a lid used for a rainwater tank attached to a rainwater storage and penetration facility.

  If a large amount of water flows into the rainwater storage and infiltration facility or rainwater tank due to heavy rain, etc., and the water pressure on the lower surface of the lid that closes the upper opening of the rainwater tank rises, the lid will come off the rainwater tank, and the removed lid will be washed away during flooding was there. Various techniques have been developed to prevent such a lid from flowing out.

  For example, Patent Document 1 includes a lid body in which a plurality of shaft holes and vent holes penetrating in the vertical direction are provided, and a valve body that moves up and down to open and close the vent holes of the lid body through the shaft holes. A manhole cover has been proposed in which a stopper for preventing the valve body from flowing out is provided at the lower end 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 and the water pressure can be released, so the lid is not flushed.

  Patent Document 2 includes a lid body having a through-hole penetrating in the vertical direction, and a movable opening / closing lid that moves up and down to open and close the through-hole of the lid body. There is disclosed a drain line pressure release lid provided with a locking claw for preventing the movable opening / closing lid from flowing out at the lower end. 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 the above two patent documents, if a valve body or a movable opening / closing lid is provided separately from the lid body, or if a stopper portion or a locking claw portion is provided to restrict the upward movement of these, In addition to the complexity of the structure, it is also necessary to attach a valve body or the like provided with a stopper or the like to the lid body, resulting in an increase in manufacturing cost.

  Therefore, the present invention has been made in view of the above-described problems in the prior art, and an object of the present invention is to provide a lid that is low in manufacturing cost and is unlikely to flow out from a rainwater tank or the like during heavy rain.

  In order to achieve the above object, the present invention comprises a lid main body and a plurality of cylindrical members or rod-shaped members arranged at positions spaced from each other in the vicinity of the edge of the lower surface of the lid main body, and the hole portion of the opening hole The lid body closes the opening of the opening hole in a state where the plurality of cylindrical members or rod-shaped members are arranged, and the opening hole is applied when water pressure is applied to the lower surface of the lid body. The hydraulic pressure is released from the gap between the lid main body and the opening, and a part of the plurality of cylindrical members or rod-shaped members comes into contact with the inner surface of the hole to separate the lid from the opening. When the water pressure on the lid body is reduced, the plurality of tubular members or rod-like members are separated from the inner surface of the hole portion, and the lid is lowered by its own weight, and the lid body It is characterized by closing the opening of the opening hole.

  According to the present invention, since it is difficult for the lid to flow out simply by arranging a plurality of cylindrical members or rod-shaped members at positions apart from each other in the vicinity of the edge portion of the lower surface of the lid body, the configuration is simple and the manufacturing cost is low. Can be suppressed.

  The plurality of cylindrical members or rod-shaped members can be detachably attached to the lid body. Thereby, since the lid body and the cylindrical member can be stored or transported in a separated state, storage / transport efficiency can be improved.

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

  As described above, according to the present invention, it is possible to provide a lid that is low in manufacturing cost and hardly flows out from a rainwater tank or the like in the case of heavy rain.

1 shows an embodiment of a lid according to the present invention, in which (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 in (a). . 1 shows a rainwater tank to which the lid of FIG. 1 is attached, wherein (a) is a top view and (b) is a cross-sectional view taken along line BB of (a). FIG. 1 shows a state where the lid body of FIG. 1 is attached to the rainwater tank of FIG. 2, wherein (a) is a top view and (b) is a cross-sectional view taken along the line CC of (a). It is a schematic sectional drawing which shows the example of installation of the lid | cover which concerns on this invention. FIG. 5 is a schematic cross-sectional view showing a state in which the water level in the rainwater basin rises and the lid floats in FIG. 4. It is a schematic sectional drawing which shows the experimental device of the lid | cover which concerns on this invention.

  Next, an embodiment 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 tank will be described.

  FIG. 1 shows an embodiment of a lid according to the present invention. The lid 1 is made of a plastic material, and includes a lid body 1a, a ridge 1b formed on an edge of the bottom surface of the lid body 1a, and a bottom surface. Four convex parts 1c arranged near the edge part, four pipes (tubular members) 1d attached to the convex part 1c, and a handle 1e provided on the upper surface are provided.

  The lid body 1a is provided 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.

  FIG. 2 shows a general rainwater tank to which the lid 1 is attached, and FIG. 3 shows a state in which the lid 1 is attached to the rainwater tank 2 of FIG. This rain gutter 2 includes a main body 2a having an upper opening 2b, and a groove (lid frame) 2c that is formed on the upper edge of the main body 2a and engages with the protrusion 1b of the lid 1.

  FIG. 4 shows an installation example of the rainwater trough 2 to which the lid 1 having the above configuration is attached. The rainwater tank 2 is buried in the vicinity of the rainwater storage and penetration facility 10, receives rainwater from the rainwater etc. of the building through the pipe 11, and introduces the received rainwater into the rainwater storage and penetration facility 10 through the pipe 12.

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

  Here, since the lid 1 is provided with a plurality of pipes 1d in the vicinity of the edge of the lower surface, the lid 1 is lifted from the rain gutter 2 and a horizontal force is applied by the flow of the water W on the ground during flooding. However, since the pipe 1d is in contact with the inner peripheral surface of the main body 2a of the rainwater tank 2, the lid 1 is not washed away. Then, due to the outflow of rainwater from the gap between the lid 1 and the rain basin 2, the water pressure applied to the lower surface of the lid 1 is lowered, and the lid 1 descends to a position where the upper opening 2 b of the rainwater basin 2 is blocked. Return.

  In order to confirm the state of the lid 1 when heavy rain occurred as described above, an experimental apparatus shown in FIG. 6 was manufactured, and an experiment was performed assuming a case where heavy rain fell.

  This experimental apparatus 21 includes a water tank 22 for storing tap water T, a rainwater tank 2 cut in a horizontal direction, a cylindrical body 23 having an outer diameter of 300 mm and a height of 300 mm into which the lid 1 is fitted, and a cylindrical body 23. While being fixed to form a bottom surface, a PVC plate 24 for fixing the tubular body 23 to the inside of the water tank 22 through a weight 25 made of a concrete column, and tap water T to the tubular body 23 through a pipe 27. It is comprised with the submersible pump 26 to deliver. In addition, the name of each part of the cylinder 23 and its code | symbol divert the thing of the said rain water tank 2. FIG.

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

  In the experimental apparatus 21, the lid 1 (see FIG. 1 and the like) in which the outer diameter, the length, and the attachment position of the pipe 1 d are variously set is mounted on the cylinder body 23, and the hydraulic pressure that pushes up the lid 1 by operating the pump 26. After it was generated, tap water T was injected and flooded. At this time, the water level was raised from the upper end of the cylinder 23 to 15 cm. The situation where the pump 26 is once stopped and the pump 26 is operated again to apply water pressure to the lid 1 in the submerged state, and the case where the pump 26 is stopped and the water pressure on the lid 1 no longer occurs in the submerged state. Each situation was confirmed.

  As a result of the above experiment, if the outer diameter of the pipe 1d of the lid 1 is 15 mm or more, the length is 90 mm or more, and the pipe 1d is installed inside the circle D (diameter 285 mm) indicated by a one-dot chain line in FIG. It was confirmed that the lid 1 was not lifted and was not flowed, and when the water pressure was lowered, the lid 1 was lowered by its own weight, and the upper opening 2b (see FIG. 2 and the like) of the cylindrical body 23 was blocked.

  The attachment position of the pipe 1d is a position in contact with the circle D. If the pipe 1d is attached to the outside of the circle D, the pipe 1d is caught by the cylinder 23 when the water pressure applied to the lid 1 drops in the flooded state, and the upper opening is opened. This is because it has been confirmed that 2b cannot be blocked.

  In the above experiment, the lid 1 having the lid body 1a having an outer diameter of 300 mm was used. However, even when the outer diameter of the lid body 1a is changed, the pipe 1d having a length of 90 mm or more is cylindrical when the water pressure decreases. By attaching it to a position in contact with a circle D having a diameter that does not catch on 23 (the diameter changes according to the outer diameter of the lid main body 1a), water pressure is generated to push up the lid main body 1a, and the lid 1 is lifted even when submerged. There are no similar effects. Even if the outer diameter of the pipe 1d is 15 mm or less, there is no problem if the lid body 1a is not detached or damaged by water pressure or the like. Set to.

  As described above, according to the present embodiment, it is difficult for the lid 1 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. Moreover, since the pipe 1d can be removed from the convex part 1c, the lid | cover 1 can be stored or conveyed in the state which isolate | separated the lid | cover main body 1a and the pipe 1d, Therefore Storage / conveyance efficiency improves.

  In addition, in the said description, although the case where the lid | cover 1 which concerns on this invention was used for the rain water tank 2 was illustrated, it can also apply to another container, a manhole, etc. Further, the shape and material of the lid 1 and the pipe 1d can be variously changed, and the number is not limited to four as long as the number of the pipes 1d is plural. Furthermore, a rod-shaped member may be provided instead of the tubular member such as the pipe 1d.

DESCRIPTION OF SYMBOLS 1 Lid 1a Lid main body 1b Projection 1c Protruding part 1d Pipe 1e Handle 2 Rainwater trough 2a Main body 2b Upper opening 2c Groove 10 Rainwater storage penetration facility 11, 12 Piping 21 Experimental apparatus 22 Water tank 23 Cylindrical body 24 PVC board 25 Weight 26 Underwater Pump 27 Piping T Tap water W Water

Claims (3)

A lid body, and a plurality of cylindrical members or rod-like members disposed at positions spaced from each other in the vicinity of the edge of the lower surface of the lid body, and the plurality of cylindrical members or rod-like members are disposed in the hole portions of the opening holes. A lid that closes the opening of the opening hole by the lid body in a disposed state,
When water pressure is applied to the lower surface of the lid body,
The hydraulic pressure is released from the gap between the lid main body and the opening by floating from the opening hole, and a part of the plurality of cylindrical members or rod-shaped members abuts on the inner surface of the hole and the opening hole of the lid Prevent withdrawal from
When the water pressure on the lid body drops,
The lid is characterized in that the plurality of cylindrical members or rod-shaped members are separated from the inner surface of the hole portion, the lid is lowered by its own weight, and the opening portion of the opening hole is closed by the lid body.   The lid according to claim 1, wherein the plurality of cylindrical members or rod-like members are detachably attached to the lid body.   The lid according to claim 1 or 2, wherein the lid is made of plastic and closes an upper opening of a rainwater tank connected to a rainwater storage and penetration tank buried in the ground.

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