JP5643504B2

JP5643504B2 - Rainwater infiltration device

Info

Publication number: JP5643504B2
Application number: JP2009292348A
Authority: JP
Inventors: 岩崎　秀治; 秀治岩崎; 淳哉真山
Original assignee: Takiron Co Ltd
Current assignee: Takiron Co Ltd
Priority date: 2009-12-24
Filing date: 2009-12-24
Publication date: 2014-12-17
Anticipated expiration: 2029-12-24
Also published as: JP2011132722A

Description

本発明は、家屋等に降った雨水を装置内に導入して地中へ浸透させる雨水浸透装置に関するものである。 The present invention relates to a rainwater infiltration device that introduces rainwater that has fallen into a house or the like into the device and infiltrates it into the ground.

未舗装の道路や空地が殆どない都市化の進んだ地域では、家屋、駐車場、道路等に降った雨水が地中に浸透することなく側溝を通じて河川等へ流れるため、雨季には大量の雨水が河川へ集中し、短時間で河川の容量を越えて、所謂、都市型洪水を引き起こしている。 In urbanized areas where there are few unpaved roads or open spaces, rainwater that has fallen on houses, parking lots, roads, etc. flows into rivers, etc. through the ditches without penetrating into the ground, so a large amount of rainwater in the rainy season Concentrates on the river and exceeds the capacity of the river in a short time, causing so-called urban flooding.

また、上記のように雨水が地中に殆ど浸透しない都市化の進んだ地域において、工場等が大量に地下水を汲み上げて使用する場合は、地盤沈下の主たる原因ともなる。 In addition, in the urbanized area where rainwater hardly penetrates into the ground as described above, when a factory or the like pumps and uses a large amount of groundwater, it becomes a main cause of land subsidence.

このような事情から、家屋等に降った雨水を一時貯溜したのち、徐々に地中に浸透させる浸透桝が宅地内などに埋設されるようになってきた。このような浸透桝は、まず、地面に浸透桝を設置するための穴を掘り、穴の底部に砂を敷いたのち、穴の周面及び底面に透水性シートを敷設し、その上から砕石をある程度の高さまで充填する。次に、浸透桝を所定の位置に設置すると共に浸透桝に雨水配管を接続したのち、浸透桝の周囲にも砕石を充填し、砕石を覆うように透水性シートを被せ、最後に土砂を埋め戻して施工が完了する。 Under these circumstances, after temporarily storing rainwater that has fallen on houses, etc., penetrating soot that gradually penetrates into the ground has been buried in residential areas. First, digging a hole for installing the penetrating pit on the ground, laying sand on the bottom of the hole, laying a permeable sheet on the peripheral and bottom surfaces of the hole, and then crushed stone from above To a certain height. Next, after installing the seepage basin in place and connecting the rainwater pipe to the seepage basin, fill the periphery of the seepage basin with crushed stone, and cover it with a water-permeable sheet, and finally fill with earth and sand. Return to complete the construction.

しかしながら、上記のような手順で浸透桝を設置すると、雨水の浸透性能を充分に発揮するためには、広大な穴を掘削する必要があり、重量のある砕石や土砂を大量に用いる必要があるので、透水性シートの設置や砕石の充填などの作業が重労働となって作業員の負担が大きかった。また、作業が大変なだけでなく、透水性シートや砕石・土砂などの施工に必要な機材や材料を準備・運搬することも非常に手間がかかるものであった。 However, when the seepage pit is installed in the above procedure, it is necessary to excavate a vast hole and to use a large amount of heavy crushed stone and earth and sand in order to fully exhibit the rainwater infiltration performance. Therefore, work such as installation of water-permeable sheets and filling of crushed stones became heavy labor, and the burden on workers was great. In addition, the work is not only difficult, but preparation and transportation of equipment and materials necessary for construction such as water-permeable sheets, crushed stones, and earth and sand are very troublesome.

このような事情から、本出願人は、周壁に透水孔が穿孔された桝本体の外壁面に透水性シートを装着した雨水浸透桝を提案した（特許文献１）。 Under such circumstances, the present applicant has proposed a rainwater permeation kite in which a water permeable sheet is mounted on the outer wall surface of a kite body having a perforated hole in the peripheral wall (Patent Document 1).

上記特許文献１の雨水浸透桝は、桝本体の外壁面に透水性シートを装着することで、浸透桝を埋設する穴を、従来のものより小さくしても、充分な雨水の浸透能力を有し、重量のある砕石や土砂の使用量を少なくすることができたので、施工時の作業員の負担を軽減することができる優れたものであった。 The rainwater penetrating gutter disclosed in Patent Document 1 has sufficient rainwater penetration capability even if the hole for embedding the permeated gutter is made smaller than the conventional one by attaching a water permeable sheet to the outer wall surface of the gutter body. In addition, since the amount of heavy crushed stone and earth and sand could be reduced, the load on the workers during construction was excellent.

特開平１０−２５９６３６号公報Japanese Patent Laid-Open No. 10-259636

しかしながら、上記特許文献１の雨水浸透桝は、運搬時や施工時に、桝本体の外壁面に装着された透水性シートが、トラックの荷台や砕石などに引っ掛かって破れてしまう、という問題があった。また、雨水浸透桝を設置したのちも、透水性シートが細かい砂によって目詰まりして、本来の性能を発揮することが困難になってしまうことがあった。 However, the rainwater infiltrating reed of Patent Document 1 has a problem that the water-permeable sheet attached to the outer wall surface of the reed body is caught by a truck bed, crushed stone, or the like during transportation or construction. . In addition, even after the rainwater permeation cage is installed, the water-permeable sheet may be clogged with fine sand, making it difficult to exhibit its original performance.

本発明は上記の問題に鑑みてなされたもので、その解決しようとする課題は、雨水浸透装置に設けられた透水性部材が破損したり目詰まりしたりしにくい雨水浸透装置を提供することにある。また、本発明は、施工や施工準備が容易であり、運搬にも適した雨水浸透装置を提供することも解決課題とする。 The present invention has been made in view of the above problems, and the problem to be solved is to provide a rainwater infiltration device in which a water permeable member provided in the rainwater infiltration device is less likely to be damaged or clogged. is there. Another object of the present invention is to provide a rainwater infiltration device that is easy to construct and prepare for construction and suitable for transportation.

上記目的を達成するため、本発明に係る雨水浸透装置は、雨水を地中に浸透させるための浸透孔が、側面又は／及び底面に多数穿孔された雨水浸透部を備える雨水浸透装置であって、上記雨水浸透部の周囲に透水性部材が設けられると共に、その透水性部材の周囲に通水性を有する保護部材が設けられており、上記透水性部材が織布又は不織布で形成された目の細かいメッシュ状のフィルターであり、上記保護部材が合成樹脂製のネットであって、上記保護部材の通水部の開口面積が、上記雨水浸透部の浸透孔の開口面積よりも小さく、上記保護部材は、上記透水性部材よりも目が粗くて透水係数が大きいことを特徴とするものである。 In order to achieve the above-mentioned object, a rainwater infiltration device according to the present invention is a rainwater infiltration device comprising a rainwater infiltration portion in which a large number of infiltration holes for infiltrating rainwater into the ground are perforated on the side surface and / or the bottom surface. In addition, a water-permeable member is provided around the rainwater infiltration portion, and a water-permeable protective member is provided around the water-permeable member, and the water-permeable member is formed of a woven fabric or a nonwoven fabric. a fine mesh filter, the protective member is a net made of synthetic resin, the opening area of the water passing portion of the protective member, rather smaller than the opening area of the penetration hole of the rainwater penetrating part, the protective The member is characterized by being coarser than the water permeable member and having a larger water permeability coefficient .

本発明の雨水浸透装置においては、上記保護部材が上記透水性部材の上から巻き付けられて、透水性部材と共に雨水浸透装置に固定されていることが好ましく、上記保護部材が上記透水性部材と共にバンド状の固定部材で雨水浸透装置に固定されており、雨水浸透装置の外壁面に固定部材のズレ防止手段を講じたことがより好ましい。 In the rainwater infiltration device of the present invention, it is preferable that the protection member is wound from above the water permeable member and fixed to the rainwater infiltration device together with the water permeable member, and the protection member is banded with the water permeable member. Jo of being fixed to the rainwater penetration device in the fixed member, it is not more preferable that took displacement prevention means of the fixing member to the outer wall surface of the rainwater penetration device.

本発明の雨水浸透装置は、雨水浸透部の周囲に透水性部材が設けられているので、雨水浸透装置が埋設される穴を、従来のものより小さくしても、充分な雨水の浸透能力を有する。従って、砕石や土砂の使用量を少なくすることができ、施工や施工準備が容易となる。しかも、この透水性部材は、その周囲を保護部材によって保護することで、運搬時や施工時、また使用時に透水性部材が破損してしまったり、或いは、目詰まりしたりしてしまうことがなくなり、優れた浸透能力を維持することができる。特に、保護部材の通水部の開口面積を、雨水浸透部の浸透孔の開口面積よりも小さくすることで、土圧によって透水性部材が雨水浸透部の浸透孔に入り込んでしまうのが防止され、透水性部材の破損をより確実に防止することができる。 Since the rainwater infiltration device of the present invention is provided with a water permeable member around the rainwater infiltration portion, even if the hole in which the rainwater infiltration device is embedded is made smaller than the conventional one, sufficient rainwater infiltration capability is provided. Have. Therefore, the amount of crushed stone and earth and sand can be reduced, and construction and construction preparation are facilitated. Moreover, this water-permeable member protects the periphery with a protective member, so that the water-permeable member is not damaged or clogged during transportation, construction, or use. , Can maintain excellent penetration ability. In particular, by making the opening area of the water-permeable portion of the protective member smaller than the opening area of the infiltration hole of the rainwater infiltration portion, it is possible to prevent the water-permeable member from entering the infiltration hole of the rainwater infiltration portion due to earth pressure. The damage of the water permeable member can be prevented more reliably.

また、上記保護部材が上記透水性部材の上から巻き付けられて、透水性部材と共に雨水浸透装置に固定されている雨水浸透装置は、施工時に透水性部材に対して保護部材がズレてしまう心配がなくなって、確実に透水性部材を保護することができる。このように、透水性部材と保護部材を施工現場への運搬前に雨水浸透装置に固定すると、運搬中においても施工時と同様に、透水性部材を確実に保護することができるので好ましい。 In addition, the rainwater infiltration device in which the protection member is wound from above the water permeable member and is fixed to the rainwater infiltration device together with the water permeable member may cause the protection member to be displaced from the water permeable member during construction. It disappears and a water-permeable member can be protected reliably. Thus, it is preferable to fix the water permeable member and the protective member to the rainwater infiltration device before transportation to the construction site because the water permeable member can be reliably protected even during transportation as in the construction.

更に、上記保護部材が上記透水性部材と共にバンド状の固定部材で雨水浸透装置に固定されており、雨水浸透装置の外壁面に固定部材のズレ防止手段を設けた雨水浸透装置は、雨水浸透装置の外壁面にズレ防止手段を講じることで、透水性部材が雨水浸透装置に確実に固定され、ズレたり外れたりしてしまう心配が皆無に等しくなる。 Further, the rainwater permeation apparatus in which the protection member is fixed to the rainwater permeation apparatus by a band-shaped fixing member together with the water permeable member, and the rainwater permeation apparatus provided with means for preventing the displacement of the fixing member on the outer wall surface of the rainwater permeation apparatus is provided. By taking a slip prevention means on the outer wall surface, the water-permeable member is securely fixed to the rainwater infiltration device, and there is no fear of slipping or coming off.

本発明の一実施形態に係る雨水浸透装置を示す概略正面図である。It is a schematic front view which shows the rainwater osmosis | permeation apparatus which concerns on one Embodiment of this invention. 同浸透桝の分解斜視図である。FIG. 同浸透桝の使用状態を示す断面図である。It is sectional drawing which shows the use condition of the same penetration ridge. 同浸透桝の要部を示す部分拡大斜視図である。It is a partial expansion perspective view which shows the principal part of the penetration ridge.

以下、図面を参照して本発明の具体的な実施形態を詳述する。 Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

図１に示す本発明の雨水浸透装置１は、図２、図３に示すように、雨水配管１１が接続される雨水流入部２と、その雨水流入部２から流入した雨水を一時貯溜したのち徐々に地中に浸透させる雨水浸透部３と、雨水流入部２と雨水浸透部３との間に設けられる傾斜接続部４と、雨水に混じったゴミを除去するゴミ除去部５と、雨水流入部２の点検用開口２ａに被着される蓋体６と、高さ調整用のアジャスター７と、雨水浸透装置１の内部（雨水浸透部３の内部）に土砂等が侵入するのを防止する透水性部材８と、その透水性部材８を保護する保護部材９と、透水性部材８と保護部材９を雨水浸透装置１に固定するための固定部材１０とを備えており、宅地内などに埋設されて家屋等に降った雨水を地中へ浸透させる大型の桝体である。この雨水浸透装置１の材質は特に限定されるものではないが、ポリプロピレン樹脂や塩化ビニル樹脂、ＦＲＰなど軽量な合成樹脂製のものが好ましい。 As shown in FIGS. 2 and 3, the rainwater infiltration device 1 of the present invention shown in FIG. 1 temporarily stores rainwater inflow portion 2 to which a rainwater pipe 11 is connected, and rainwater flowing in from the rainwater inflow portion 2. The rainwater infiltration part 3 that gradually infiltrates into the ground, the inclined connection part 4 provided between the rainwater inflow part 2 and the rainwater infiltration part 3, the dust removal part 5 that removes dust mixed with rainwater, and the rainwater inflow The lid 6 attached to the inspection opening 2a of the section 2, the height adjusting adjuster 7, and the inside of the rainwater infiltration device 1 (inside the rainwater infiltration section 3) are prevented from entering earth and sand. A water permeable member 8, a protective member 9 that protects the water permeable member 8, and a fixing member 10 that fixes the water permeable member 8 and the protective member 9 to the rainwater infiltration device 1. It is a large enclosure that penetrates rainwater that has been buried and has fallen into houses. The material of the rainwater infiltration device 1 is not particularly limited, but is preferably made of a lightweight synthetic resin such as polypropylene resin, vinyl chloride resin, or FRP.

上記雨水流入部２は、図２、図３に示すように、上端及び下端が開口した径がφ１００〜４００ｍｍ程度（本実施形態では、φ２５０ｍｍ）の円筒で、その上端開口が雨水浸透装置１の内部をメンテナンスする際の点検用開口２ａとなっている。そして、点検用開口２ａの縁には環状の蓋受溝２ｂが形成されており、この蓋受溝２ｂに、蓋体６の周縁部裏面側に形成された環状凸部６ａを嵌合することによって、蓋体６が雨水流入部２に脱着自在に被着されている。また、雨水流入部２の筒状壁には、ホールソーなどで雨水配管１１を差込み接続するための接続孔２ｃが２つ穿孔されており、その接続孔２ｃの周縁には水密性を向上させる環状のパッキン２ｄが取付けられている。
尚、本実施形態では、雨水流入部２に、雨水配管１１を差込み接続するための接続孔２ｃが２つ穿孔されているが、この接続孔２ｃの数は適宜変更すればよく、１つでもよいし３つ以上でもよい。また、雨水流入部２に被着される蓋体６に通水孔を穿孔してもよく、その場合は、雨水流入部２に雨水配管１１を接続しなくても充分な雨水の流入量を確保することができる。更に、ホールソーなどで穿孔する接続孔２ｃの代わりに、雨水流入部２の筒状壁に接続口を設けてもよいが、本実施形態のようにホールソーなどで穿孔した接続孔２ｃにすると、施工現場で所望の箇所に自由に穿孔することができるので、配管の自由度が向上し、施工性が良好となる。この雨水流入部２はストレートでも下広がりでもよいが、本実施形態のように、雨水配管１１をホールソーなどで穿孔した接続孔２ｃに差込み接続する場合は、ストレート形状のほうが好ましい。 As shown in FIGS. 2 and 3, the rainwater inflow part 2 is a cylinder having a diameter of about φ100 to 400 mm (in this embodiment, φ250 mm) with an upper end and a lower end opened, and an upper end opening of the rainwater infiltration device 1. This is an inspection opening 2a for maintaining the inside. An annular lid receiving groove 2b is formed at the edge of the inspection opening 2a, and an annular convex portion 6a formed on the back side of the peripheral edge of the lid body 6 is fitted into the lid receiving groove 2b. Thus, the lid 6 is detachably attached to the rainwater inflow portion 2. Further, two connection holes 2c for inserting and connecting the rainwater pipe 11 with a hole saw or the like are drilled in the cylindrical wall of the rainwater inflow portion 2, and the periphery of the connection hole 2c has an annular shape that improves water tightness. The packing 2d is attached.
In the present embodiment, two connection holes 2c for inserting and connecting the rainwater pipe 11 are drilled in the rainwater inflow portion 2, but the number of the connection holes 2c may be changed as appropriate. It may be three or more. Further, a water passage hole may be drilled in the lid body 6 attached to the rainwater inflow portion 2, and in that case, a sufficient amount of rainwater can be introduced without connecting the rainwater pipe 11 to the rainwater inflow portion 2. Can be secured. Further, instead of the connection hole 2c drilled with a hole saw or the like, a connection port may be provided on the cylindrical wall of the rainwater inflow portion 2, but if the connection hole 2c is drilled with a hole saw or the like as in the present embodiment, Since a desired location can be freely drilled at the site, the degree of freedom of piping is improved and the workability is improved. The rainwater inflow portion 2 may be straight or spread downward, but when the rainwater pipe 11 is inserted and connected to the connection hole 2c drilled with a hole saw or the like as in this embodiment, a straight shape is preferable.

上記雨水流入部２から流入した雨水を地中に浸透させる雨水浸透部３は、図２、図３に示すように、雨水流入部２よりも横断面積が大きい（径がφ４００〜１０００ｍｍ程度のものが好適に用いられ、本実施形態では、径がφ５００ｍｍとなっている）やや下窄まりの円筒で、その上端周縁には、後述する高さ調整用のアジャスター７の下端を嵌合する環状の受溝３ｂが形成されていると共に、その側面には、内部に流入してきた雨水を地中に浸透させるための浸透孔３ａが多数穿孔されている。この浸透孔３ａの径がφ１０ｍｍよりも小さいと、充分な雨水の浸透能力を確保することが困難となり、また、φ１００ｍｍよりも大きいと雨水浸透部３の強度が低下するといった不具合が生じる。従って、この浸透孔３ａの径はφ１０〜１００ｍｍ程度とすることが必要で、φ１０〜５０ｍｍ程度とするのが好ましい。
尚、この雨水浸透部３は前述した雨水流入部２よりも横断面積を大きくする必要があるので、例えば、雨水流入部２の径がφ４００ｍｍの場合、この雨水浸透部３の径はφ４００ｍｍよりも大きくする必要がある。 As shown in FIGS. 2 and 3, the rainwater infiltration portion 3 that infiltrates rainwater flowing in from the rainwater inflow portion 2 into the ground has a larger cross-sectional area than the rainwater inflow portion 2 (having a diameter of about φ400 to 1000 mm). (In this embodiment, the diameter is φ500 mm) and is a slightly constricted cylinder, and an annular shape that fits a lower end of a height adjuster 7 to be described later on the periphery of the upper end. The receiving groove 3b is formed, and a large number of permeation holes 3a for allowing rainwater flowing into the interior to permeate into the ground are formed on the side surface. If the diameter of the permeation hole 3a is smaller than φ10 mm, it is difficult to ensure sufficient rainwater permeation capability, and if it is larger than φ100 mm, the strength of the rainwater permeation portion 3 is reduced. Therefore, the diameter of the penetration hole 3a needs to be about φ10 to 100 mm, and preferably about φ10 to 50 mm.
Since the rainwater infiltration portion 3 needs to have a larger cross-sectional area than the rainwater inflow portion 2 described above, for example, when the diameter of the rainwater inflow portion 2 is φ400 mm, the diameter of the rainwater infiltration portion 3 is more than φ400 mm. It needs to be bigger.

また、本実施形態の雨水浸透部３は、より雨水浸透能力を向上させるために下端も略全面開口しており、雨水流入部２から流入してきた雨水は、上記浸透孔３ａとこの下端開口３ｃから徐々に放出されて地中に浸透していくようになっている。このように、雨水浸透部３の径をφ５００ｍｍ程度の大型のものとし、浸透孔３ａと下端開口３ｃを設けると、充分な雨水の浸透能力が付与されるので、雨水浸透装置１を設置する際に充填する砕石の量を減らしたり、或いは、砕石を全く使用しなくても、砕石使用時と同等の浸透能力を確保することができる。 In addition, the rainwater infiltration portion 3 of the present embodiment has a substantially lower end also opened to improve the rainwater infiltration capability, and the rainwater that has flowed in from the rainwater inflow portion 2 has the infiltration hole 3a and the lower end opening 3c. It is gradually released from and penetrates into the ground. As described above, when the rainwater permeation portion 3 has a large diameter of about φ500 mm and the permeation hole 3a and the lower end opening 3c are provided, sufficient rainwater permeation capability is provided. Even if the amount of crushed stone to be filled is reduced or no crushed stone is used at all, it is possible to ensure the same penetration ability as when using crushed stone.

尚、上記雨水浸透部３は下端が有底であっても勿論構わなくて、その場合は、その底部に浸透孔３ａを穿孔したり、側面に穿孔される浸透孔３ａの径を大きくしたり、数を増やしたりすることで同様の浸透能力を確保すればよい。また、雨水浸透部３は、下窄まりの円筒ではなく、後述するアジャスター７を複数段積み重ねることで形成してもよく、その場合、下端は全面開口している。更に、本実施形態の雨水浸透装置１は、作業員の負担を軽減するため、砕石の使用量を軽減、或いは、砕石を全く使用しないで済むように雨水浸透部３を大型のものとしたが、従来のように、掘削した穴に砕石を充填するのであれば、上記のような大型の雨水浸透部３は不必要で、雨水流入部２と同等の径（φ２５０ｍｍ程度）の雨水浸透部を用いればよい。 Of course, the rainwater permeation part 3 may have a bottom at the bottom, in which case the permeation hole 3a is perforated at the bottom or the diameter of the permeation hole 3a perforated at the side is increased. The same penetration capability can be secured by increasing the number. Further, the rainwater infiltration portion 3 may be formed by stacking a plurality of adjusters 7 to be described later, instead of a constricted cylinder, and in that case, the lower end is opened over the entire surface. Furthermore, in the rainwater infiltration device 1 of the present embodiment, the rainwater infiltration unit 3 is made large so that the amount of crushed stone is reduced or no crushed stone is used at all in order to reduce the burden on the worker. If the excavated hole is filled with crushed stone as in the prior art, the large rainwater infiltration portion 3 as described above is unnecessary, and the rainwater infiltration portion having the same diameter (about φ250 mm) as the rainwater inflow portion 2 is not necessary. Use it.

次に、上記雨水流入部２と上記雨水浸透部３との間に設けられる傾斜接続部４は、図２、図３に示すように、その外壁面の全面が下広がりの傾斜壁４ａとなった截頭円錐形をしている。前述したように、本発明の雨水浸透装置１は、雨水流入部２の横断面積よりも雨水浸透部３の横断面積が大きいので、雨水流入部２と雨水浸透部３との間に設けられる傾斜接続部４の外壁面が傾斜した傾斜壁４ａではなく、単に地面ＧＬと水平な壁であれば、その上側に埋め戻された土砂等の重量がまともに傾斜接続部４に加わってしまうので、傾斜接続部４を形成する際に、高強度を発現する材料を用いたり、肉厚を厚くしたりするなどの特別な対策が必要となってコストが嵩んでしまうが、傾斜接続部４の外壁面を下広がりに傾斜した傾斜壁４ａとすることで、傾斜接続部４の上側にある埋め戻し材料の荷重が傾斜壁４ａの傾斜角に沿って下方に逃がされるので、傾斜接続部４に上記のような特別な対策を講じなくても、埋め戻し材料の重量で傾斜接続部４が破損してしまう心配が少なくなる。
尚、この傾斜接続部４は、外壁面の少なくとも一部が下広がりに傾斜していればその効果を奏するものであり、本実施形態のように、必ずしも外壁面の全面を傾斜壁４ａとする必要はない。 Next, as shown in FIGS. 2 and 3, the inclined connecting portion 4 provided between the rainwater inflow portion 2 and the rainwater infiltration portion 3 is an inclined wall 4a whose entire outer wall surface is spread downward. Has a truncated cone shape. As described above, since the rainwater infiltration device 1 of the present invention has a larger cross-sectional area of the rainwater infiltration portion 3 than the cross-sectional area of the rainwater inflow portion 2, the slope provided between the rainwater inflow portion 2 and the rainwater infiltration portion 3. If the outer wall surface of the connecting portion 4 is not the inclined wall 4a inclined but is simply a wall parallel to the ground GL, the weight of earth and sand buried back on the upper side will be added to the inclined connecting portion 4 properly. When the inclined connecting portion 4 is formed, special measures such as using a material exhibiting high strength or increasing the thickness are necessary, which increases the cost. By setting the wall surface to the inclined wall 4a inclined downward, the load of the backfill material on the upper side of the inclined connection portion 4 is released downward along the inclination angle of the inclined wall 4a. Without taking special measures like Fear of inclined connecting portions 4 in an amount is damaged is reduced.
The inclined connecting portion 4 is effective if at least a part of the outer wall surface is inclined downwardly, and the entire outer wall surface is not necessarily the inclined wall 4a as in the present embodiment. There is no need.

上記傾斜接続部４は、前述したように、下広がりに傾斜した傾斜壁４ａを有しており、埋め戻し材料の荷重は下方に逃げるようになっているので、傾斜接続部４を地面ＧＬと水平に形成した場合と比較すると、強度的な問題は生じにくいが、傾斜接続部４の破損を確実に防止するために、図３に示すように、傾斜壁４ａの内側には複数の補強リブ４ｄが放射状に設けられている。このように、傾斜接続部４の外壁面を傾斜壁４ａにすると共に、その内側に補強リブ４ｄを設けることで、埋め戻し材料の荷重によって傾斜接続部４が破損してしまうことが皆無に等しくなる。 As described above, the inclined connecting portion 4 has the inclined wall 4a inclined downward and the load of the backfill material escapes downward, so that the inclined connecting portion 4 is connected to the ground GL. Compared with the case where it is formed horizontally, the problem of strength is less likely to occur. However, in order to reliably prevent the inclined connecting portion 4 from being damaged, a plurality of reinforcing ribs are provided inside the inclined wall 4a as shown in FIG. 4d is provided radially. Thus, by making the outer wall surface of the inclined connecting portion 4 into the inclined wall 4a and providing the reinforcing rib 4d on the inner side, the inclined connecting portion 4 is never damaged by the load of the backfill material. Become.

また、上記傾斜接続部４の傾斜壁４ａには、図２、図３に示すように、その上端より上記雨水流入部２の下端を受ける環状の周壁４ｂが上方に突設されていると共に、その下端の周縁部裏面側には、後述する高さ調整用のアジャスター７の環状溝７ａと嵌合する環状の突壁４ｃが設けられている。 Further, as shown in FIGS. 2 and 3, an annular peripheral wall 4 b that receives the lower end of the rainwater inflow portion 2 from its upper end protrudes upward from the inclined wall 4 a of the inclined connection portion 4. An annular projecting wall 4c that fits into an annular groove 7a of a height adjuster 7 to be described later is provided on the rear surface side of the peripheral edge at the lower end.

更に、上記傾斜接続部４の内部には、図２、図３に示すように、ゴミ除去部５が設けられている。このゴミ除去部５は、下端が開口した傾斜面５Ａと、その下端開口５ａに設けられたゴミ捕集部５Ｂとを備えたもので、このゴミ除去部５によって、雨水流入部２と雨水浸透部３が仕切られている。 Further, as shown in FIGS. 2 and 3, a dust removal unit 5 is provided inside the inclined connection unit 4. The dust removing unit 5 includes an inclined surface 5A having an open lower end and a dust collecting unit 5B provided in the lower end opening 5a. The dust removing unit 5 allows the rainwater inflow unit 2 and the rainwater infiltration to pass therethrough. Part 3 is partitioned.

本発明の雨水浸透装置１は、前述したように、通常の排水桝よりも大型の雨水浸透部３を用いているので、雨水浸透部３の内部の清掃を頻繁に行うのは非常に煩雑である。このような事情から、雨水流入部２より流入してきた雨水を、雨水に混入したゴミを捕集するゴミ捕集部５Ｂへと効率よく導くことが必要となるので、そのために上記ゴミ除去部５には傾斜面５Ａが備えられている。この傾斜面５Ａは、図２、図３に示すように、下端が開口したテーパー形状をしている。そして、傾斜面５Ａの下端開口５ａの周縁部より断面が略Ｌ字形の係止段部５ｂが下側に突設されており、この係止段部５ｂにゴミ捕集部５Ｂの縁部５ｃを載置し、係止させることで、ゴミ捕集部５Ｂが傾斜面５Ａに脱着自在に取付けられている。 As described above, since the rainwater infiltration device 1 of the present invention uses the rainwater infiltration unit 3 larger than a normal drainage tub, it is very complicated to frequently clean the inside of the rainwater infiltration unit 3. is there. For this reason, it is necessary to efficiently guide the rainwater flowing in from the rainwater inflow portion 2 to the dust collecting portion 5B that collects the dust mixed in the rainwater. Is provided with an inclined surface 5A. As shown in FIGS. 2 and 3, the inclined surface 5A has a tapered shape with an open lower end. A locking step portion 5b having a substantially L-shaped cross section projects downward from the peripheral edge of the lower end opening 5a of the inclined surface 5A, and an edge portion 5c of the dust collecting portion 5B is provided on the locking step portion 5b. Is attached to the inclined surface 5A so as to be detachable.

上記傾斜面５Ａによって雨水流入部２より流入してきた雨水をゴミ捕集部５Ｂへと導くには、傾斜面５Ａの上端が雨水配管１１の下面よりも下方に位置することが必要で、また、ゴミを捕集するには、横断面積が大きい箇所で捕集するよりも横断面積が小さい箇所で捕集するほうが捕集効率がよい（雨水配管１１から流入してきたゴミを含んだ雨水が、雨水流入部２の中で広がってゴミが分散してしまう前に捕集することができるため）。従って、この傾斜面５Ａは、図３に示すように、その上端が、傾斜接続部４の傾斜壁４ａの下端より上方で、且つ、雨水配管１１の下面よりも下方に位置するように形成されている。本実施形態では、より横断面積の小さい箇所でゴミを捕集することができるように、傾斜面５Ａの上端が、傾斜接続部４の傾斜壁４ａの上端と同じ高さに位置するように形成されている。このような位置にゴミ除去部５の傾斜面５Ａを形成することで、傾斜面５Ａよりも下側が浸透部として機能するようになり、その下端開口５ａに設けられるゴミ捕集部５Ｂの上端が、横断面積の小さい部分に位置するようになるので、雨水浸透装置１の内部に流入するゴミを効率よく捕集することができる。
尚、本実施形態では、ゴミ除去部５の傾斜面５Ａの上端が、傾斜接続部４の傾斜壁４ａの上端と同じ高さにあるが、傾斜面５Ａの上端がそれよりも高い位置にあっても、横断面積が小さい箇所でゴミを捕集することができるので好ましく、その場合は、雨水流入部２の内部にゴミ除去部５の傾斜面５Ａを設ければよい。 In order to guide the rainwater flowing in from the rainwater inflow portion 2 to the dust collecting portion 5B by the inclined surface 5A, it is necessary that the upper end of the inclined surface 5A is located below the lower surface of the rainwater pipe 11, In order to collect garbage, it is better to collect at a place where the cross-sectional area is small than when it is collected at a place where the cross-sectional area is large (rain water containing garbage flowing from the rainwater pipe 11 is rainwater. Because it can be collected before it spreads in the inflow part 2 and the dust is dispersed). Therefore, as shown in FIG. 3, the inclined surface 5 </ b> A is formed such that its upper end is located above the lower end of the inclined wall 4 a of the inclined connection portion 4 and below the lower surface of the rainwater pipe 11. ing. In the present embodiment, the upper end of the inclined surface 5A is formed so as to be positioned at the same height as the upper end of the inclined wall 4a of the inclined connecting portion 4 so that dust can be collected at a portion having a smaller cross-sectional area. Has been. By forming the inclined surface 5A of the dust removing portion 5 at such a position, the lower side of the inclined surface 5A functions as an infiltration portion, and the upper end of the dust collecting portion 5B provided in the lower end opening 5a is Since it comes to be located in a part with a small cross-sectional area, the dust which flows into the inside of the rainwater infiltration apparatus 1 can be collected efficiently.
In the present embodiment, the upper end of the inclined surface 5A of the dust removing portion 5 is at the same height as the upper end of the inclined wall 4a of the inclined connecting portion 4, but the upper end of the inclined surface 5A is at a higher position. However, it is preferable because dust can be collected at a location where the cross-sectional area is small. In this case, the inclined surface 5A of the dust removing portion 5 may be provided inside the rainwater inflow portion 2.

また、上記傾斜面５Ａの下端開口５ａは、メンテナンスの際などで、ゴミ捕集部５Ｂを雨水流入部２の点検用開口２ａから取り出すときに、雨水配管１１とゴミ捕集部５Ｂが干渉して取り出しにくくなるのを防止するために、平面視で雨水流入部２に接続された雨水配管１１を避けた位置にくるように形成するのが好ましく、本実施形態では、図２に示すように、傾斜面５Ａの下端開口５ａは雨水浸透装置１の中心に形成されている。 In addition, the lower end opening 5a of the inclined surface 5A interferes with the rainwater pipe 11 and the dust collection portion 5B when the dust collection portion 5B is taken out from the inspection opening 2a of the rainwater inflow portion 2 during maintenance. In order to prevent it from becoming difficult to take out, it is preferable to form it so as to be located away from the rainwater pipe 11 connected to the rainwater inflow portion 2 in plan view. In this embodiment, as shown in FIG. The lower end opening 5 a of the inclined surface 5 A is formed at the center of the rainwater infiltration device 1.

上記のような傾斜面５Ａの下端開口５ａに設けられるゴミ捕集部５Ｂは、図２、図３に示すように、上端に縁部５ｃが形成されたバケツ型のもので、その側面には多数の通水孔５ｄが穿孔されている。このゴミ捕集部５Ｂを設けることにより、雨水流入部２から流入してきた雨水に混じったゴミは、このゴミ捕集部５Ｂの底部に堆積し、きれいな雨水が通水孔５ｄを通過して雨水浸透部３に流入するようになる。従って、雨水流入部２から流入してきた雨水によって雨水浸透部３の浸透孔３ａが詰まる心配がなくなり、このゴミ捕集部５Ｂだけを定期的にメンテナンスすれば、雨水浸透部３の内部の清掃を頻繁に行う必要がなくなるので、メンテナンス性に優れる。また、ゴミ捕集部５Ｂの縁部５ｃには把手５ｅが取付けられており、雨水流入部２に被着された蓋体６を取り外し、上方から点検用開口２ａに手を挿入し把手５ｅを掴むことで、簡単にゴミ捕集部５Ｂを取り出すことができるようになっている。 As shown in FIGS. 2 and 3, the dust collecting portion 5B provided in the lower end opening 5a of the inclined surface 5A as described above is a bucket type in which an edge portion 5c is formed at the upper end. A large number of water passage holes 5d are formed. By providing the dust collecting portion 5B, the dust mixed with the rainwater flowing in from the rainwater inflow portion 2 is accumulated at the bottom of the dust collecting portion 5B, and the clean rainwater passes through the water passage hole 5d and becomes rainwater. It flows into the infiltration part 3. Therefore, there is no fear that the rainwater flowing in from the rainwater inflow section 2 will clog the permeation hole 3a of the rainwater permeation section 3, and if only the dust collection section 5B is regularly maintained, the inside of the rainwater permeation section 3 can be cleaned. Since it does not need to be performed frequently, it is excellent in maintainability. A handle 5e is attached to the edge 5c of the dust collecting portion 5B. The lid 6 attached to the rainwater inflow portion 2 is removed, and a hand is inserted into the inspection opening 2a from above to hold the handle 5e. By grasping, the dust collecting part 5B can be easily taken out.

次に、上記雨水浸透部３と上記傾斜接続部４との間に介在される高さ調整用のアジャスター７は、上下が開口した雨水浸透部３と同径のφ５００ｍｍ程度の円筒で、図２、図３に示すように、その上端周縁部には、傾斜接続部４の突壁４ｃと嵌合する環状溝７ａが形成されている。このアジャスター７は、蓋体６と地面ＧＬが面一となるようにするための高さ調整用の円筒であるが、ゴミ除去部５よりも下側に位置するので、その筒状壁にも浸透孔を穿孔し、上記雨水浸透部３と同様に、このアジャスター７も雨水を地中に浸透させるための浸透部としての役割を果たすようにしてもよい。このようにすると、アジャスター７によっても雨水浸透部３の容積を調整することができるようになる。また、前述したように、雨水浸透部３は、下窄まりの円筒ではなく、筒状壁に浸透孔を穿孔したアジャスター７を複数段積み重ねることで形成してもよい。 Next, the height adjustment adjuster 7 interposed between the rainwater infiltration portion 3 and the inclined connection portion 4 is a cylinder having a diameter of about 500 mm and having the same diameter as the rainwater infiltration portion 3 opened at the top and bottom. As shown in FIG. 3, an annular groove 7 a that fits with the protruding wall 4 c of the inclined connecting portion 4 is formed at the peripheral edge of the upper end. This adjuster 7 is a cylinder for height adjustment so that the lid body 6 and the ground GL are flush with each other, but is located below the dust removing portion 5, so that the cylindrical wall also has A permeation hole may be drilled, and the adjuster 7 may serve as a permeation part for permeating rainwater into the ground in the same manner as the rainwater permeation part 3. In this way, the volume of the rainwater infiltration portion 3 can be adjusted also by the adjuster 7. In addition, as described above, the rainwater infiltration portion 3 may be formed by stacking a plurality of adjusters 7 each having an infiltration hole in a cylindrical wall instead of the bottom-squeezed cylinder.

また、上記アジャスター７の外壁面には、図２、図３に示すように、後述する固定部材１０のズレ防止手段である凸条７ｂが、その全周に亘って設けられている。このズレ防止手段７ｂは、固定部材１０がアジャスター７からズレ落ちないのであれば本実施形態のような凸条７ｂに限定されるものではなく、例えば、アジャスター７の外壁面に凹部を設けることで講じてもよく、また、表面に細かい凹凸形状を付して表面をザラザラに加工するなどして講じてもよい。また、ズレ防止手段７ｂを講じる箇所は、このアジャスター７に限定されるものではなく、雨水浸透部３に講じてもよいし、傾斜接続部４や雨水流入部２に講じてもよい。 Further, as shown in FIGS. 2 and 3, the outer wall surface of the adjuster 7 is provided with ridges 7 b that serve as means for preventing a shift of the fixing member 10, which will be described later, over the entire circumference. This deviation preventing means 7b is not limited to the convex strip 7b as in the present embodiment as long as the fixing member 10 does not fall off the adjuster 7. For example, by providing a concave on the outer wall surface of the adjuster 7. It may be taken, or the surface may be roughened to give a fine uneven shape. Further, the place where the deviation preventing means 7b is provided is not limited to the adjuster 7, and may be provided in the rainwater infiltration portion 3 or may be provided in the inclined connection portion 4 or the rainwater inflow portion 2.

本発明の雨水浸透装置１は、前述したように、作業員の負担を軽減するために、砕石の使用量を軽減、或いは、砕石を使用しなくてもいいように雨水浸透部３が大型のものとなっている。砕石を使用しない場合は、雨水浸透部３の浸透孔３ａより、周囲の土砂等が浸透孔３ａや下端開口３ｃより雨水浸透部３の内部に侵入してきてしまう。そこで、このような不具合を防止するために、雨水浸透部３の周囲には次に説明する透水性部材８が設けられている。 As described above, the rainwater infiltration device 1 of the present invention has a large rainwater infiltration portion 3 so as to reduce the amount of crushed stones or reduce the use of crushed stones in order to reduce the burden on workers. It has become a thing. When crushed stone is not used, the surrounding earth and sand etc. will penetrate | invade into the inside of the rainwater penetration part 3 from the penetration hole 3a and the lower end opening 3c from the penetration hole 3a of the rainwater penetration part 3. Therefore, in order to prevent such a problem, a water-permeable member 8 described below is provided around the rainwater infiltration portion 3.

即ち、この透水性部材８は、織布又は不織布で形成された目の細かいメッシュ状のフィルターで、この透水性部材８によって、雨水浸透部３の浸透孔３ａより土砂等が侵入するのを防止するようになっている。この透水性部材８にはある程度の強度が必要で、一般的には厚みが１〜２０ｍｍ、引張強度が２０〜３０００Ｎ／５ｃｍ程度のものが好適に用いられる。また、この透水性部材８によって、細かい砂などの侵入を防止しつつも、透水性を確保しなければならないので、透水係数が１０^−２〜１ｃｍ／ｓｅｃの程度のものが好適に用いられる。この透水性部材８が不織布の場合は、ポリエステル系の長繊維不織布が特に好適に用いられる。 That is, the water permeable member 8 is a fine mesh filter formed of a woven fabric or a non-woven fabric. The water permeable member 8 prevents earth and sand from entering through the infiltration holes 3a of the rainwater infiltration portion 3. It is supposed to be. The water-permeable member 8 needs to have a certain level of strength, and generally has a thickness of about 1 to 20 mm and a tensile strength of about 20 to 3000 N / 5 cm. In addition, since the water permeable member 8 needs to ensure water permeability while preventing intrusion of fine sand or the like, a material having a water permeability coefficient of about 10 ^{−2 to 1} cm / sec is preferably used. When the water-permeable member 8 is a nonwoven fabric, a polyester-based long fiber nonwoven fabric is particularly preferably used.

上記のような構成の透水性部材８は、雨水浸透部３の浸透孔３ａや下端開口３ｃからの土砂等の侵入を防止するためのものなので、少なくともそれらを覆う必要がある。本実施形態では、図１、図３に示すように、雨水浸透部３の浸透孔３ａや下端開口３ｃを覆うように雨水浸透部３の周囲に巻き付けられて使用されている。また、前述したように、高さ調整用のアジャスター７にズレ防止手段７ｂを講じている関係で、雨水浸透部３のみならず、アジャスター７までを覆うようになっている。 The water-permeable member 8 having the above-described configuration is for preventing intrusion of earth and sand from the permeation hole 3a and the lower end opening 3c of the rainwater permeation portion 3, and therefore needs to cover at least them. In this embodiment, as shown in FIGS. 1 and 3, the rainwater penetration part 3 is wound around the rainwater penetration part 3 so as to cover the penetration hole 3 a and the lower end opening 3 c of the rainwater penetration part 3. Further, as described above, not only the rainwater infiltration portion 3 but also the adjuster 7 is covered because the shift prevention means 7b is provided on the height adjuster 7.

本発明の雨水浸透装置１は、施工性を考慮すると、施工現場へ運搬する前に予め組立てておき、施工現場では雨水配管１１を接続するのみとするのが好ましいので、上記透水性部材８も雨水浸透装置１（雨水浸透部３の周囲）に設けられた状態で運搬され、そののち施工される。雨水浸透装置１に透水性部材８を設けた状態で運搬・施工すると、透水性部材８がトラックの荷台に擦れたり荷台の尖った部分に接触したりして、或いは、施工現場で砕石に引っ掛かって破損したりする恐れが生じる。また、長年の使用でメッシュ地に細かい砂などが入り込んでしまい、本来の浸透能力を発揮できないこともある。このような不具合が生じないように、本発明の雨水浸透装置１は、上記透水性部材８の周囲に更に保護部材９が設けられている。 In consideration of workability, the rainwater infiltration device 1 of the present invention is preferably assembled in advance before being transported to the construction site, and only the rainwater pipe 11 is connected at the construction site. It is transported in the state provided in the rainwater infiltration device 1 (around the rainwater infiltration unit 3), and then installed. When the rainwater infiltration device 1 is transported and constructed with the water permeable member 8 provided, the water permeable member 8 rubs against the truck bed, contacts the pointed part of the bed, or gets caught by crushed stone at the construction site. May cause damage. In addition, fine sand and the like may enter the mesh area over many years, and the original penetration ability may not be achieved. In order to prevent such a problem, the rainwater infiltration device 1 of the present invention is further provided with a protective member 9 around the water-permeable member 8.

上記透水性部材８を保護する保護部材９は、縦糸と横糸をその交点で熱融着した通水性を有する合成樹脂製のネットで、図３、図４に示すように、上記透水性部材８の上から更に巻き付けられて、透水性部材８と共に固定部材１０によって雨水浸透装置１に固定されている。この保護部材９は、浸透孔３ａや下端開口３ｃへの土砂等の侵入を防止する性能よりも、透水性部材８の保護性能と通水性が優先されるので、耐摩擦性能に優れたものが使用される。また、通水性を確保するため、保護部材９の透水係数は、透水性部材８の透水係数よりも大きくなっており、この保護部材９の縦糸と横糸により形成される通水部９ａの開口面積は、１ｍｍ^２より大きくなっている（即ち、保護部材９は、透水性部材８よりも目が粗く、透水能力が高い（透水係数が大きい））。この通水部９ａの開口面積は、雨水浸透部３の浸透孔３ａの開口面積よりも小さく、このように保護部材９の通水部９ａの開口面積を浸透孔３ａの開口面積よりも小さくすることで、保護部材９の内側に保護されている透水性部材８が、周囲の土圧によって浸透孔３ａへ入り込んでしまい、そこから破損するのを防止することができる。
尚、ここでいう通水部９ａの開口面積とは、多数の通水部９ａの面積を合計したものをいうのではなく、縦糸と横糸によって形成される一つの通水部９ａの開口面積のことを意味するものである。 The protective member 9 that protects the water permeable member 8 is a net made of synthetic resin having water permeability in which warp and weft are heat-sealed at the intersection thereof, as shown in FIGS. Is further wound from above and fixed to the rainwater infiltration device 1 by the fixing member 10 together with the water-permeable member 8. This protective member 9 has superior friction resistance because the protective performance and water permeability of the water permeable member 8 are given priority over the performance of preventing infiltration of earth and sand into the permeation hole 3a and the lower end opening 3c. used. Moreover, in order to ensure water permeability, the water permeability coefficient of the protection member 9 is larger than the water permeability coefficient of the water permeability member 8, and the opening area of the water flow portion 9a formed by the warp and weft of the protection member 9 Is larger than 1 mm ² (that is, the protective member 9 is coarser than the water permeable member 8 and has a high water permeability (high water permeability coefficient)). The opening area of the water passage portion 9a is smaller than the opening area of the permeation hole 3a of the rainwater permeation portion 3, and thus the opening area of the water passage portion 9a of the protection member 9 is made smaller than the opening area of the permeation hole 3a. In this way, it is possible to prevent the water permeable member 8 protected inside the protective member 9 from entering the penetration hole 3a due to the surrounding earth pressure and damaging from there.
In addition, the opening area of the water flow part 9a here does not mean the sum total of the areas of many water flow parts 9a, but the opening area of one water flow part 9a formed by warp and weft. It means that.

上記保護部材９は、上記透水性部材８を保護するため、その上から透水性部材８を覆うように巻き付けられたのち、図１、図３に示すように、バンド状の固定部材１０で透水性部材８と共に雨水浸透装置１に固定される。透水性部材８と保護部材９を雨水浸透装置１に固定する固定部材１０は、透水性部材８と保護部材９を確実に雨水浸透装置１に固定できるものであればどのようなものでも構わないが、施工性を考慮すると、インシュロック、ＰＰバンド、タッカーなどが好適に用いられ、本実施形態では、固定部材１０としてインシュロックが用いられている。この固定部材１０で透水性部材８と保護部材９を固定する際は、透水性部材８と保護部材９を雨水浸透装置１に巻き付けたのち、高さ調整用のアジャスター７のズレ防止手段７ｂより上方の位置で、固定部材１０を締め付けていく。このようにすることで、固定部材１０が運搬・施工時に下側へズレ落ちそうになっても、アジャスター７の凸条７ｂに引っ掛かって係合するので、固定部材１０がアジャスター７からズレ落ちる心配がなくなり、それによって固定されている透水性部材８と保護部材９が外れてしまう心配がなくなる。
尚、固定部材１０で固定する位置は、ズレ防止手段を講じた箇所に応じて、雨水浸透部３、傾斜接続部４や雨水流入部２でも構わない。また、ズレ防止手段を複数箇所に講じた場合も、その箇所に応じて複数の位置で固定部材１０により固定しても構わない。 In order to protect the water permeable member 8, the protective member 9 is wound so as to cover the water permeable member 8 from above, and then, as shown in FIG. 1 and FIG. It is fixed to the rainwater infiltration device 1 together with the sex member 8. The fixing member 10 that fixes the water permeable member 8 and the protective member 9 to the rainwater infiltration device 1 may be any member as long as the water permeable member 8 and the protection member 9 can be reliably fixed to the rainwater infiltration device 1. However, in consideration of workability, an insulation lock, a PP band, a tucker, or the like is preferably used. In this embodiment, an insulation lock is used as the fixing member 10. When fixing the water permeable member 8 and the protective member 9 with the fixing member 10, after the water permeable member 8 and the protective member 9 are wound around the rainwater infiltration device 1, the height adjusting adjuster 7 is prevented from being displaced. The fixing member 10 is tightened at the upper position. By doing in this way, even if the fixing member 10 is likely to be displaced downward during transportation and construction, the fixing member 10 is hooked on the convex strip 7b of the adjuster 7 and engaged, so that the fixing member 10 may be displaced from the adjuster 7. Therefore, there is no fear that the water-permeable member 8 and the protective member 9 fixed thereby will come off.
In addition, the position fixed with the fixing member 10 may be the rainwater infiltration part 3, the inclined connection part 4, and the rainwater inflow part 2 according to the location where the deviation prevention means was taken. Moreover, even when the shift preventing means is provided at a plurality of locations, the fixing member 10 may be fixed at a plurality of locations according to the locations.

上記のような保護部材９によって透水性部材８を保護することで、運搬・施工時に、透水性部材８がトラックの荷台に擦れたり、或いは、施工現場で砕石に引っ掛かって破れたりする心配がなくなる。また、この保護部材９は、透水性部材８のメッシュ地に細かい砂などが入り込んでしまうことも防止するので、本来の浸透能力を維持したまま長年の使用にも耐え得ることができる。
尚、保護部材９は透水性部材８を確実に保護できるのであれば上記のようなネットに限定されるものではなく、網目状又は多孔状の板やシートであっても構わない。また、その材質も合成樹脂製のものに限定されるものではなく、金属製のものであってもよい。 By protecting the water permeable member 8 with the protective member 9 as described above, there is no fear that the water permeable member 8 will be rubbed against the truck bed during transportation and construction, or it may be caught by a crushed stone at the construction site and torn. . In addition, since the protective member 9 prevents fine sand and the like from entering the mesh of the water permeable member 8, it can withstand long-term use while maintaining the original permeation ability.
The protective member 9 is not limited to the above-described net as long as the water-permeable member 8 can be reliably protected, and may be a net-like or porous plate or sheet. Moreover, the material is not limited to that made of synthetic resin, but may be made of metal.

以上のような構成の雨水浸透装置１は、雨水流入部２、雨水浸透部３、傾斜接続部４、ゴミ除去部５、蓋体６、アジャスター７が組立てられて、その上から雨水浸透部３を覆うように透水性部材８と保護部材９を巻き付け、そののち固定部材１０によって固定され、その状態のまま施工現場まで運搬される。そして、施工現場では、雨水浸透装置１を設置する穴を掘削したのち、図３に示すように、高さ調整用のアジャスター７によって蓋体６と地面ＧＬが面一となるように雨水浸透装置１全体の高さを調節し、雨水流入部２の筒状壁に穿孔された接続孔２ｃ，２ｃに雨水配管１１，１１を接続する。この際、高さ調整用のアジャスター７だけでは蓋体６と地面ＧＬが面一にならない場合は、傾斜接続部４と雨水流入部２との間にも高さ調整用のアジャスターを設けることで対応することができる。 In the rainwater infiltration device 1 having the above-described configuration, the rainwater inflow portion 2, the rainwater infiltration portion 3, the inclined connection portion 4, the dust removal portion 5, the lid body 6, and the adjuster 7 are assembled. The water-permeable member 8 and the protective member 9 are wound so as to cover, and then fixed by the fixing member 10 and transported to the construction site in that state. At the construction site, after digging a hole for installing the rainwater infiltration device 1, as shown in FIG. 3, the rainwater infiltration device is arranged so that the lid 6 and the ground GL are flush with each other by the height adjustment adjuster 7. 1 The height of the whole is adjusted, and the rainwater pipes 11, 11 are connected to the connection holes 2c, 2c drilled in the cylindrical wall of the rainwater inflow portion 2. At this time, if the lid 6 and the ground GL are not flush with the height adjustment adjuster 7 alone, a height adjustment adjuster is also provided between the inclined connection portion 4 and the rainwater inflow portion 2. Can respond.

上記説明から明らかなように、本発明の雨水浸透装置１は、雨水浸透部３の浸透孔３ａや下端開口３ｃから土砂等が内部に侵入するのを防止するための透水性部材８が、破損したり目詰まりしたりしてしまうことがなく、長期に亘って優れた浸透能力を維持することができる。 As is clear from the above description, in the rainwater infiltration device 1 of the present invention, the water permeable member 8 for preventing dirt and the like from entering the inside from the infiltration hole 3a and the lower end opening 3c of the rainwater infiltration portion 3 is damaged. It does not become clogged or clogged, and can maintain an excellent penetration ability over a long period of time.

１雨水浸透装置
２雨水流入部
２ａ点検用開口
２ｂ蓋受溝
２ｃ接続孔
２ｄパッキン
３雨水浸透部
３ａ浸透孔
３ｂ受溝
３ｃ下端開口
４傾斜接続部
４ａ傾斜壁
４ｂ周壁
４ｃ突壁
４ｄ補強リブ
５ゴミ除去部
５Ａ傾斜面
５ａ下端開口
５ｂ係止段部
５Ｂゴミ捕集部
５ｃ縁部
５ｄ通水孔
５ｅ把手
６蓋体
６ａ環状凸部
７アジャスター
７ａ環状溝
７ｂズレ防止手段（凸条）
８透水性部材
９保護部材
９ａ通水部
１０固定部材
１１雨水配管
ＧＬ地面 DESCRIPTION OF SYMBOLS 1 Rainwater infiltration apparatus 2 Rainwater inflow part 2a Inspection opening 2b Cover receiving groove 2c Connection hole 2d Packing 3 Rainwater infiltration part 3a Infiltration hole 3b Reception groove 3c Lower end opening 4 Inclined connection part 4a Inclined wall 4b Peripheral wall 4c Projection wall 4d Reinforcement rib 5 Dust removal part 5A Inclined surface 5a Lower end opening 5b Locking step part 5B Dust collection part 5c Edge part 5d Water passage hole 5e Handle 6 Lid 6a Annular convex part 7 Adjuster 7a Annular groove 7b Slip prevention means (projection)
8 Water-permeable member 9 Protective member 9a Water passage portion 10 Fixed member 11 Rainwater piping GL Ground

Claims

雨水を地中に浸透させるための浸透孔が、側面又は／及び底面に多数穿孔された雨水浸透部を備える雨水浸透装置であって、
上記雨水浸透部の周囲に透水性部材が設けられると共に、その透水性部材の周囲に通水性を有する保護部材が設けられており、
上記透水性部材が織布又は不織布で形成された目の細かいメッシュ状のフィルターであり、上記保護部材が合成樹脂製のネットであって、
上記保護部材の通水部の開口面積が、上記雨水浸透部の浸透孔の開口面積よりも小さく、
上記保護部材は、上記透水性部材よりも目が粗くて透水係数が大きいことを特徴とする雨水浸透装置。 A rainwater infiltration device comprising a rainwater infiltration section having a plurality of permeation holes for infiltrating rainwater into the ground, which are perforated on the side surface and / or the bottom surface,
A water permeable member is provided around the rainwater infiltration portion, and a protective member having water permeability is provided around the water permeable member,
The water-permeable member is a fine mesh filter formed of woven or non-woven fabric, and the protective member is a synthetic resin net,
The opening area of the water passing portion of the protective member, rather smaller than the opening area of the penetration hole of the rainwater penetration unit,
The rainwater infiltration apparatus according to claim 1, wherein the protective member is coarser than the water permeable member and has a larger water permeability coefficient .

上記保護部材が上記透水性部材の上から巻き付けられて、透水性部材と共に雨水浸透装置に固定されていることを特徴とする請求項１に記載の雨水浸透装置。 The rainwater infiltration device according to claim 1, wherein the protection member is wound from above the water permeable member and fixed to the rainwater infiltration device together with the water permeable member.

上記保護部材が上記透水性部材と共にバンド状の固定部材で雨水浸透装置に固定されており、雨水浸透装置の外壁面に固定部材のズレ防止手段を講じたことを特徴とする請求項１又は請求項２に記載の雨水浸透装置。 The protective member is fixed to the rainwater infiltration device with a band-shaped fixing member together with the water-permeable member, and means for preventing the fixing member from shifting is provided on the outer wall surface of the rainwater infiltration device. Item 3. A rainwater infiltration device according to Item 2.