JP2017089355A - Side ditch rainwater drainage system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a side ditch mosquito generation prevention drainage system, which is installed under a catchment cover of a rainwater catchment basin installed in a road side ditch and catches and drains rainwater that flows down through the catchment cover.SOLUTION: A side ditch mosquito generation prevention drainage system 8 is like a net and installed under a catchment basin catchment cover 1 of a road side ditch in order to catch and drain rainwater that flows down through the catchment cover 1. An upper part of the side ditch mosquito generation prevention drainage system can be sandwiched and fixed without clearance between the catchment cover 1 and a fixing part 6 of the catchment cover. Bar spring elastic on-off valves 9, 10, which can drain fallen leaves, sediment and foreign materials that pass through the cover 1 and are caught in the mosquito generation prevention drainage system 8, are disposed at a lower part of the drainage system.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a drain device for a side groove that is attached to the lower side of a water collection lid and collects and drains rainwater that flows down from the water collection lid in a rainwater catchment provided in a side groove of a road or the like.

  In general, in the lateral groove of the road R shown in FIG. 1, water collecting basins 2 that collect rainwater and discharge it toward the rainwater sewer pipe 5 buried underground are provided at predetermined intervals.

  The water collecting lid 1 employs a square iron grid with large eyes so that clogging does not occur when fallen leaves, soil, or small foreign matter flows together with rainwater or the like. There is a catchment 2 under the catchment lid 1, and a reservoir 4 is provided at the bottom of the catchment for the purpose of preventing these fallen leaves, earth and sand and foreign matter from flowing into the rainwater sewer 5. Rainwater is stored in the reservoir 4 and becomes a source of mosquitoes.

  In order to prevent mosquito intrusion as disclosed in, for example, Patent Document 1 and Document 2, rainwater introduction valves and flap pieces have been devised as countermeasures against the occurrence of mosquitoes in water collecting traps. However, in order to achieve a great effect, it must be introduced into all rainwater catches in the estate, and the installation cost is too expensive, so there is almost no introduction.

  In Japanese Patent Application No. 2015-14750, in order to solve the above-mentioned problems, the drainage device itself is net-like and can prevent mosquitoes from entering, the upper part can be fixed between the water collecting lid and its fixing part without any gap, and the lower part of the water collecting cover can be fixed. It is a device with a rod spring elastic on-off valve that can discharge fallen leaves and sediments that have passed through the net and discharged foreign matter, and normal rainwater is washed away from the net to the rainwater trough, but the net is clogged with fallen leaves etc. If rainwater stays on the device, or if a large amount of rainwater flows due to torrential rain, and the rainwater stays on the device, the elastic on-off valve opens due to the weight of the accumulated water, and both fallen leaves and rainwater are washed away to the catchment. However, a mosquito-generating drainage device for side gutters that can be automatically closed after being washed away has been proposed, but if the opening and closing force of the elastic on-off valve is set strongly, the fallen leaves that accumulate will not flow with rainwater and the opening and closing force is set weakly. Then, foreign matter is caught Prevention function of the mosquito becomes more remain net open there was a problem that can not be exhibited.

Japanese Patent Application No. 2015-14750

  The problem to be solved is an inexpensive drainage device with a simple structure to prevent the occurrence of mosquitoes etc. in the drainage gutters on the side gutters of roads, etc., providing a device that does not need to manage fallen leaves etc. The task is to do.

  In order to solve the above-mentioned problems, the drainage device itself is net-like and can prevent mosquitoes from entering, the upper part can be fixed with no gap between the water collecting lid and its fixing part, and the lower part passes between the water collecting cover and passes through the net The device is equipped with a bar spring elastic on-off valve that can discharge the accumulated fallen leaves and soil foreign matter.Normal rainwater is washed away from the net to the rainwater trough, but the net is clogged with fallen leaves and the rainwater is on the device. If there is a stagnation or if a large amount of rainwater flows due to heavy rain, and the rainwater stays on the device, the spring spring on / off valve will open due to the weight of the stagnation water, and both fallen leaves and rainwater will be washed away into the catchment basin. In the ditch mosquito generation prevention drainage device which can be automatically closed, the rod spring is made of two pairs of parts separated near the center, the outside is fixed and the inside is not fixed.

  An object of the present invention is to prevent mosquitoes from entering the outside and preventing the mosquitoes that are generated in the pool from jumping out of the mosquito, and to ensure that rainwater flows into the sewer pipe without maintenance even during heavy rain.

  In a drainage device for a side ditch that is attached to the lower side of a water collecting basin collecting lid 1 of a road side ditch and collects and drains rainwater flowing down from the water collecting lid 1, the drainage device 8 itself is net-like, and the upper part collects water. A device in which bar spring elastic on-off valves 9 and 10 are arranged which can be fixed without gap between the lid 1 and its fixing part 6 and which can be discharged at the lower part through the water collecting lid and collect fallen leaves and earth and sand foreign matter accumulated in the net. Since the elastic on-off valves 9 and 10 are normally closed, the mosquitoes cannot reach the rainwater pool 4 due to the sealed net 8 and have the effect of preventing spawning. Normally, rainwater is washed away from the net to the rainwater basin, but the net is clogged with fallen leaves, etc., and if rainwater accumulates on the device, or a large amount of rainwater flows in due to torrential rain, etc., rainwater remains on the device. In this case, we have invented a drain device for preventing mosquito generation for side grooves that opens the elastic on-off valve due to its own weight and allows both fallen leaves and rainwater to flow into the rainwater basin and automatically closes after the runoff. Since the bar spring elastic on-off valve is free in the center, the opening / closing force is 1/4 of the opening / closing force in the center compared to when one bar spring of the same thickness is used. When the force is the same force, the opening / closing force at a quarter of the end is twice as much as the opening / closing force of one bar spring. This indicates that it is possible to let fall leaves and the like flow with a small amount of rainwater, and the rod spring on-off valve can be reliably closed after the flow, so that mosquitoes can be reliably prevented from entering.

    In the central part of the two pairs of bar spring on / off valves, a fixed part or the like is formed to fix the net and the bar spring. The fixing part can be created by attaching silicon rubber, aluminum ring, iron ring, etc. to the tip of the bar spring.

    The two pairs of rod spring opening / closing valves are inclined downward toward the center, so that fallen leaves and the like are likely to gather in the portion where the center opening / closing force is weakest, and can be easily washed away with less rainwater.

  In some cases, the water collecting lid is provided with a fixed chain so that it cannot be removed for safety. By cutting only the part where the chain collides with the net, the entry of mosquitoes can be prevented.

Schematic cross section of the catchment Outline sectional view of the present invention Perspective view of the present invention Perspective view with fixing parts attached to the center of the rod spring on / off valve Drawing with rod spring on / off valve created diagonally Schematic cross-sectional view of the cut-out portion for securing the water collecting lid cover Perspective view of a mosquito net countermeasure net with a bar spring open / close valve made of a pair of bar springs

DESCRIPTION OF SYMBOLS 1 Catch cover 2 Catchment tank 3 Rainwater sewer pipe connection pipe 4 Rainwater sewer reservoir part 5 Rainwater sewer pipe 6 Catch cover fixing part 7 Drainage apparatus fixing part 8 Drainage apparatus body 9 Drainage apparatus elastic on-off valve 10 Drainage apparatus elastic opening and closing Valve 11 Bar spring fixing part 12 Part for fixing bar spring and net 13 Chain cutting part 14 Water collecting lid cover fixing chain 15 Elastic body for net fixing

Since the external shape of the water collecting lid 1 is 460 mm × 420 mm and the opening is 430 mm × 390 mm, the upper external shape is 455 mm × 410 mm, the depth is 300 mm, and the lower portion is 2 mm in diameter using a 2 mm mesh polyethylene net. A mosquito generation prevention drainage device with a 300 mm net ring was made. Elastic opening and closing drains set with a spacing of 1 mm, with 150 mm long rod springs 9 and 10 (center spring constant 2 N / mm) made through a lower mesh ring and a fixed end 11 (Fig. 2). Further, a 3 mm silicon tube was attached to the center of the bar spring as a part for fixing the net. When rain water was passed through the apparatus at 10 L / min, no stagnant water flowed. 10 L / min is the amount of rainwater flowing into one catchment basin during a torrential rain of 25 mm / hour, assuming that culverts are installed at both ends of a road with a width of 4 m every 20 m.
In addition, 50 polyethylene films having an outer diameter of 60 mm × 40 mm and a thickness of 0.1 mm were uniformly placed from the lower part assuming rained leaves on the inside of the apparatus, and when rainwater was allowed to flow at 10 L / min, there was about 0.5 L of stagnant water. However, the central clearance of the elastic on-off valve opened to 3 mm, allowing smooth drainage, and the polyethylene film was gradually washed away. After 1 minute, 30 sheets were washed away. At that time, the accumulated water was gone, and it was confirmed that the fallen leaves were washed away with rainwater.

  An apparatus having a structure in which the lower bar spring of the above embodiment was formed with a portion 5 cm outside from the lower surface and a center portion having an inclination of 0.5 cm was prepared. When fallen leaves were dropped on this device, the fallen leaves gathered in the center along the slope.

Claims (4)

  It is attached to the underside of the drainage drainage cover of the road gutter, and the drainage basin drainage device that collects and drains rainwater that flows down from the drainage cover is net-like, and the upper part is fixed to the drainage lid and the drainage trap. Two pairs of bar springs are arranged at the lower outlet, and the function of allowing the bar springs to open and close automatically by the weight of rainwater collected on the net is discharged. In the mosquito generation prevention drainage device for side grooves, the two pairs of rod springs are fixed on the outside of the bar springs, and the mosquito generation prevention drainage device on the side groove is not fixed in the vicinity of the center.   The drainage device for side grooves which has a part which fixes a bar spring to a net | network in the center part of two pairs of bar springs of the mosquito generation prevention drainage device for side grooves of Claim 1.   The drainage device for side grooves in which two pairs of bar springs of the mosquito generation prevention drainage device for side grooves according to claim 1 are inclined downward toward the central portion.   A drainage device for a side ditch in which only a portion through which a chain for fixing a water collecting lid is passed is formed in a net portion of the drainage device for preventing mosquito generation for a side ditch according to claim 1

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