JP2022097313A - Water intake device - Google Patents

Water intake device Download PDF

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JP2022097313A
JP2022097313A JP2020210839A JP2020210839A JP2022097313A JP 2022097313 A JP2022097313 A JP 2022097313A JP 2020210839 A JP2020210839 A JP 2020210839A JP 2020210839 A JP2020210839 A JP 2020210839A JP 2022097313 A JP2022097313 A JP 2022097313A
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water intake
water
intake device
screen
main body
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JP7407450B2 (en
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正人 増本
Masato Masumoto
佳和 橋詰
Yoshikazu Hashizume
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NAKAJIMA KOMUTEN KK
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Abstract

To provide a water intake device that is suitable for water intake from a mountain stream and the like and is very easy to maintain and manage.SOLUTION: A water intake device 10 comprises: a box-shaped water intake device body 12; and a water intake screen 16 provided so as to cover an opening 14 formed from above the water intake device body 12 to a front surface. The water intake screen 16 is formed by arranging a lower surface 22 of a wire member 20a located on an upper side and an upper surface 24 of the wire member 20b located on a lower side in parallel at a predetermined interval with a state in which a plurality of horizontally formed square columnar wire members 20 is directed diagonally downward from above, and an intake direction f of raw water taken from a gap between the lower surface 22 and the upper surface 24 is diagonally upward.SELECTED DRAWING: Figure 2

Description

本発明は、中山間地域における谷川などからの取水に好適な取水装置に関する。 The present invention relates to a water intake device suitable for water intake from a valley river or the like in a mountainous area.

従来から、表流水の取水装置が種々開示されている（例えば、特許文献１及び特許文献２参照。）。特許文献１に開示された表流水の背面取水装置は、取水器本体の上面開口部に取水スクリーンを斜め後ろ下がりに支持し、当該取水スクリーンの上方部に臨ませた表流水の流入受け板を、当該表流水の流入側へ張り出し形成し、当該流入受け板から流入する表流水を、取水器背面の取水スクリーンから取水するように構成したことを特徴とする。また、取水器本体の上面開口部に取水スクリーンを斜め後ろ下がりに支持し、当該取水スクリーンの上方部に表流水の流入受け板を斜め後ろ下がりに支持し、当該流入受け板の左右両側位置に跳水防止ガイドを配設し、流入受け板から流入する表流水の跳水を跳水防止ガイドで防止しつつ、取水器背面の取水スクリーンから表流水を取水するように構成したことを特徴としている。 Conventionally, various water intake devices for surface water have been disclosed (see, for example, Patent Document 1 and Patent Document 2). The back surface intake device for surface water disclosed in Patent Document 1 supports an intake screen diagonally backward and downward at the upper opening of the intake device body, and has an inflow receiving plate for surface water facing the upper part of the intake screen. The surface water is formed so as to project to the inflow side of the surface water, and the surface water flowing from the inflow receiving plate is taken from the intake screen on the back of the water intake device. In addition, the intake screen is supported diagonally backward and downward at the upper opening of the water intake main body, and the surface water inflow receiving plate is supported diagonally backward and backward above the intake screen, and is located on both the left and right sides of the inflow receiving plate. A hydraulic jump prevention guide is provided, and the surface water is prevented from splashing from the inflow receiving plate by the hydraulic jump prevention guide, and the surface water is taken from the intake screen on the back of the water intake device.

この特許文献１に開示された表流水の背面取水装置によると、河川表流水の流れの背面側から取水できることになり、その際、落ち葉や流木等を流出させながら取水スクリーンから表流水を背面取水することができるので、従前のような水源の維持管理作業の煩わしさを大幅に解消すると共に、取水設備コストの大幅な軽減にも貢献することができる旨、記載されている。更に、本器に設けた表流水の跳水防止ガイドが跳水現象を防止しつつ、取水スクリーンへ向かう水流を形成すべく機能し、これにて河川表流水の流速変化による取水能力の低下を防止し、所期の取水性能がコンスタントに発揮できる等の諸効果をもたらす旨、記載されている。 According to the surface water intake device disclosed in Patent Document 1, water can be taken from the back side of the river surface water flow, and at that time, the surface water is taken back from the intake screen while flowing out fallen leaves and driftwood. It is stated that this can greatly eliminate the troublesomeness of water source maintenance work as in the past, and can also contribute to a significant reduction in the cost of water intake equipment. In addition, the surface water splash prevention guide provided on the instrument functions to form a water flow toward the intake screen while preventing the hydraulic jump phenomenon, thereby preventing a decrease in water intake capacity due to changes in the flow velocity of river surface water. , It is stated that the desired water intake performance will bring about various effects such as being able to constantly exert.

また、特許文献２に開示された渓流取水用傾斜スクリーンは、水路中に介在する溢流堰板と、この堰板の下流側に連なって所定勾配の流路床を形成するブラインド部と、前記流路床の下流延長方向に順次配列された流路床断片の列であって、各断片はそれらの流路床面が前記所定勾配に沿った流れの上流に向かって所定の俯角を有するように配置されてなる滑走部流路床断片列と、前記滑走部流路床断片列の下流延長方向において順次間隙を置いて配列されたウエッジワイヤ列であって、個々のウエッジワイヤは流路床断片をなすそれらの各ウエッジ底面が前記所定勾配に沿った流れの上流に向かって所定の仰角を有するように配置されてなる取水部ウエッジワイヤ列と、各ウエッジワイヤ間を通過した水を捕集するために、少なくとも前記ウエッジワイヤ列の下方に配置された取水タンクとを備えたことを特徴とする。 Further, the inclined screen for mountain stream intake disclosed in Patent Document 2 includes an overflow dam plate interposed in the water channel, a blind portion connected to the downstream side of the dam plate to form a flow path floor having a predetermined gradient, and the above. A row of flow path floor fragments sequentially arranged in the downstream extension direction of the flow path floor, each fragment having a predetermined depression angle toward the upstream of the flow along the predetermined gradient. It is a wedge wire row arranged with a gap in the downstream extension direction of the sliding portion flow path floor fragment row and the sliding portion flow path floor fragment row, and each wedge wire is a flow path floor. A water intake wedge wire row in which the bottom surface of each of those wedges forming a fragment is arranged so as to have a predetermined elevation angle toward the upstream of the flow along the predetermined gradient, and the water passing between the wedge wires is collected. It is characterized by having at least an intake tank arranged below the wedge wire row.

この特許文献２に開示された渓流取水用傾斜スクリーンによると、ブラインド板部と、各俯角を有する上部ウエッジワイヤ列と、各仰角を有する下部ウエッジワイヤ列とを備えた傾斜スクリーン構造において、整流し、夾雑物を撥ね上げ、スクリーンの目詰まりなく、清水流を必要量だけ誘導的に取水し、従って、維持管理及び補修の手間を極小化することができる渓流等に適した、環境に優しい取水装置を提供することができる旨、記載されている。 According to the inclined screen for mountain stream intake disclosed in Patent Document 2, rectification is performed in an inclined screen structure including a blind plate portion, an upper wedge wire row having each depression angle, and a lower wedge wire row having each elevation angle. Environmentally friendly water intake suitable for mountain streams, etc., which can repel impurities, inductively take in the required amount of fresh water flow without clogging the screen, and therefore minimize the labor of maintenance and repair. It is stated that the device can be provided.

特許第３０７５９２８号公報Japanese Patent No. 3075928 特許第３１２００７２号公報Japanese Patent No. 3120072

特許文献１に開示された表流水の取水装置や特許文献２に開示された渓流取水用傾斜スクリーンによると、取水効率の向上が図られるとともに、維持管理もある程度、容易に行えるものと思料する。 According to the surface water intake device disclosed in Patent Document 1 and the inclined screen for mountain stream intake disclosed in Patent Document 2, it is considered that the water intake efficiency can be improved and the maintenance can be easily performed to some extent.

しかし、中山間地域に設置される取水装置においては、設置場所までの移動に危険を伴う場合が多いため、可能な限り維持管理作業を不要にできる取水装置が求められる。特に、取水装置内に堆積した土砂や泥の排出作業や取水材の洗浄作業は非常に煩雑であるため、これらの作業を殆ど不要にできる取水装置が求められていた。 However, in the water intake device installed in the mountainous area, it is often dangerous to move to the installation place, so that the water intake device that can eliminate the maintenance work as much as possible is required. In particular, since the work of discharging the earth and sand and mud accumulated in the water intake device and the work of cleaning the water intake material are extremely complicated, there has been a demand for a water intake device that can make these operations almost unnecessary.

そこで本願発明者らは、上記の問題点に鑑み、谷川などでの取水に好適であるとともに、維持管理が非常に容易である取水装置を提供するべく鋭意検討を重ねた結果、本発明に至ったのである。 Therefore, in view of the above problems, the inventors of the present application have made diligent studies to provide a water intake device that is suitable for water intake in Tanigawa and the like and is very easy to maintain, and as a result, the present invention has been reached. It was.

即ち、本発明の取水装置は、箱状の取水装置本体と、該取水装置本体の上方から前面にかけて形成された開口部を覆って配設される取水スクリーンとを含んで構成され、前記取水スクリーンが、水平状態にした断面四角柱状の複数のワイヤ部材を上方から斜め下方に向かって、上側に位置する該ワイヤ部材の下面と、下側に位置する該ワイヤ部材の上面とを平行にして所定の間隔を空けて並べて形成され、前記下面と、前記上面との隙間から取水される原水の取水方向が、斜め上方に向かっていることを特徴とする。 That is, the water intake device of the present invention includes a box-shaped water intake device main body and a water intake screen arranged so as to cover the opening formed from the upper side to the front surface of the water intake device main body. However, a plurality of wire members having a horizontally formed square columnar cross section are arranged diagonally downward from above so that the lower surface of the wire member located on the upper side and the upper surface of the wire member located on the lower side are parallel to each other. It is characterized in that the raw water taken from the gap between the lower surface and the upper surface is diagonally upward.

また、本発明の取水装置において、前記取水装置本体の上方に、原水の流入側に張り出した流入板が配設され、前記流入板上に、所定の間隔を空けて複数の整流突起が配設されていることを特徴とする。 Further, in the water intake device of the present invention, an inflow plate projecting to the inflow side of raw water is arranged above the water intake device main body, and a plurality of rectifying protrusions are arranged on the inflow plate at predetermined intervals. It is characterized by being done.

本発明の取水装置によると、原水に含まれる枯れ葉等の浮遊ゴミはもちろんであるが、土砂や泥、細砂等も取水装置本体内に入りにくく、取水装置本体内に細砂等が殆ど溜まらないため、維持管理が非常に容易な取水装置を提供することができる。 According to the water intake device of the present invention, not only floating dust such as dead leaves contained in raw water, but also earth and sand, mud, fine sand, etc. are difficult to enter into the main body of the water intake device, and almost no fine sand, etc. accumulates in the main body of the water intake device. Therefore, it is possible to provide a water intake device that is very easy to maintain.

また、本発明の取水装置において、取水装置本体の上方に配設された流入板上に、所定の間隔を空けて複数の整流突起が配設されていることによって、流入板から取水スクリーンに導水される原水の流速を低下させつつ分散させて整流することができるため、取水スクリーンの全面を有効利用した取水が可能となり、取水効率の向上が図られる。 Further, in the water intake device of the present invention, water is guided from the inflow plate to the water intake screen by arranging a plurality of rectifying protrusions at predetermined intervals on the inflow plate arranged above the water intake device main body. Since it is possible to disperse and rectify the raw water while reducing the flow velocity of the raw water, it is possible to effectively utilize the entire surface of the intake screen and improve the intake efficiency.

本発明の一実施形態に係る取水装置を示す図であって、（ａ）は正面図、（ｂ）は平面図である。It is a figure which shows the water intake device which concerns on one Embodiment of this invention, (a) is a front view, (b) is a plan view. （ａ）は図１（ａ）におけるＡ－Ａ断面図、（ｂ）は図２（ａ）におけるＢ部拡大図である。(A) is a cross-sectional view taken along the line AA in FIG. 1 (a), and FIG. 2 (b) is an enlarged view of a portion B in FIG. 2 (a). 一般的な取水スクリーンを示す拡大断面図である。It is an enlarged sectional view which shows the general intake screen.

以下、本発明の一実施形態について、図面に基づいて説明する。図１（ａ）は、本発明の一実施形態に係る取水装置１０を示す正面図、同図（ｂ）は当該取水装置１０の平面図、図２（ａ）は、図１（ａ）に示した取水装置１０におけるＡ－Ａ断面図、同図（ｂ）は、図２（ａ）におけるＢ部拡大図である。これらの図に示すように、本実施形態に係る取水装置１０は、特に、中山間地域における谷川などで取水するのに好適であって、箱状の取水装置本体１２と、取水装置本体１２の上方から前面にかけて形成された開口部１４を覆って配設される取水スクリーン１６と、を含んで構成される。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 (a) is a front view showing a water intake device 10 according to an embodiment of the present invention, FIG. 1 (b) is a plan view of the water intake device 10, and FIG. 2 (a) is shown in FIG. 1 (a). The cross-sectional view taken along the line AA in the water intake device 10 shown, FIG. 2B is an enlarged view of part B in FIG. 2A. As shown in these figures, the water intake device 10 according to the present embodiment is particularly suitable for taking water in a valley river or the like in a mountainous area, and has a box-shaped water intake device main body 12 and a water intake device main body 12. It is configured to include an intake screen 16 arranged so as to cover the opening 14 formed from above to the front surface.

本実施形態の取水装置１０に係る取水スクリーン１６は、まず水平状態にした断面形状が正方形をなす四角柱状の複数のワイヤ部材２０，２０，・・・を上方から斜め下方に向かって、上側に位置するワイヤ部材２０ａの下面２２と、下側に位置するワイヤ部材２０ｂの上面２４とを平行にして所定の間隔を空けて並べて形成されている。 In the water intake screen 16 according to the water intake device 10 of the present embodiment, first, a plurality of square columnar wire members 20, 20, ... The lower surface 22 of the positioned wire member 20a and the upper surface 24 of the wire member 20b located on the lower side are arranged in parallel and arranged at a predetermined interval.

そして、本実施形態の取水スクリーン１６を構成するワイヤ部材２０において、上側に位置するワイヤ部材２０ａの下面２２と、下側に位置するワイヤ部材２０ｂの上面２４との隙間から取水される原水の取水方向ｆが、斜め上方に向かっていることを特徴とする。 Then, in the wire member 20 constituting the water intake screen 16 of the present embodiment, the raw water taken from the gap between the lower surface 22 of the wire member 20a located on the upper side and the upper surface 24 of the wire member 20b located on the lower side is taken. It is characterized in that the direction f is directed diagonally upward.

一般的な取水装置に係る取水スクリーンは、取水効率の向上を図るため、取水スクリーン表面を流れる原水に対して抵抗となるようにワイヤ部材が配設されている。具体的には、図３に示す取水スクリーンＳのように、取水スクリーンＳの表面を流れる原水の流れ方向Ｇに対して、各ワイヤ部材４０の上面４４が抵抗となるようにワイヤ部材４０が配設されている。そして、上側に位置するワイヤ部材４０ａの下面４２と、下側に位置するワイヤ部材４０ｂの上面４４との隙間から取水される原水の取水方向ｇが斜め下方に向かっている。このような構成を備える取水スクリーンＳによると、原水の取水効率は非常に高いが、原水に混入している土砂や細砂等も取水装置内に取り込んでしまうため、取水装置本体内に堆積した土砂や細砂等の排出作業を頻繁に行う必要がある。 In the water intake screen of a general water intake device, wire members are arranged so as to resist raw water flowing on the surface of the water intake screen in order to improve the water intake efficiency. Specifically, as in the water intake screen S shown in FIG. 3, the wire member 40 is arranged so that the upper surface 44 of each wire member 40 acts as a resistance against the flow direction G of the raw water flowing on the surface of the water intake screen S. It is set up. Then, the intake direction g of the raw water taken from the gap between the lower surface 42 of the wire member 40a located on the upper side and the upper surface 44 of the wire member 40b located on the lower side is directed diagonally downward. According to the intake screen S having such a configuration, the intake efficiency of the raw water is very high, but since the earth and sand and fine sand mixed in the raw water are also taken into the intake device, they are accumulated in the main body of the intake device. It is necessary to frequently discharge sediment and fine sand.

しかし、本実施形態に係る取水スクリーン１６では、取水スクリーン１６表面を流れる原水の流れ方向Ｆに対して各ワイヤ部材２０の上面２４は抵抗とならず、スムーズに取水スクリーン１６表面を流下していくため、土砂や細砂等も殆ど取水装置本体１２内に取り込まれることがない。なお、本実施形態に係る取水スクリーン１６における取水方向ｆは斜め上方に向かっているため、図３に示した一般的な取水スクリーンＳと比較して取水効率は低下する。しかし、中山間地域において要求される取水量はそれほど多くなく、必要最低限の取水量が確保できればよい。それ以上に、取水装置本体１２内に溜まった土砂や細砂等の排出作業を可能な限り不要にできる、維持管理が非常に容易な取水装置が望まれており、その観点からも本実施形態に係る取水スクリーン１６が配設された取水装置１０は、非常に好適である。 However, in the water intake screen 16 according to the present embodiment, the upper surface 24 of each wire member 20 does not become a resistance to the flow direction F of the raw water flowing on the surface of the water intake screen 16, and smoothly flows down the surface of the water intake screen 16. Therefore, earth and sand, fine sand, and the like are hardly taken into the water intake device main body 12. Since the water intake direction f in the water intake screen 16 according to the present embodiment is obliquely upward, the water intake efficiency is lower than that of the general water intake screen S shown in FIG. However, the amount of water intake required in the hilly and mountainous areas is not so large, and it is sufficient if the minimum necessary amount of water can be secured. More than that, there is a demand for a water intake device that can be very easy to maintain and manage, which can eliminate the need for discharging the earth and sand and fine sand accumulated in the water intake device main body 12 as much as possible. The water intake device 10 provided with the water intake screen 16 according to the above is very suitable.

なお、本実施形態の取水装置１０に係る前面最底部には排泥管１８が配設され、側面下方には取水口１９が配設されており、取水スクリーン１６から取水された原水は、取水口１９に接続された取水管（不図示）を介して濾過装置等へ送水される。本実施形態の取水装置１０によると、上記の構成を備える取水スクリーン１６で取水することによって、取水装置本体１２内に土砂や細砂等が溜まることは殆ど無い。ただし、ごく僅かではあるが取水した原水に混ざって細砂等が取水装置本体１２内に侵入し、取水装置本体１２内に沈殿する場合もあるため、念のため前面最底部に排泥管１８を配設している。取水装置本体１２内に沈殿した細砂等を排出する場合は、取水口１９を閉栓した状態で、排泥管１８を導通させることにより、取水スクリーン１６から取水された原水によって容易に排出することができる。 A mud drain pipe 18 is arranged at the bottom of the front surface of the water intake device 10 of the present embodiment, and an intake port 19 is arranged at the lower side of the side surface. Water is sent to a filtration device or the like via an intake pipe (not shown) connected to the port 19. According to the water intake device 10 of the present embodiment, by taking water with the water intake screen 16 having the above configuration, earth and sand, fine sand and the like are hardly accumulated in the water intake device main body 12. However, although it is very small, fine sand or the like may enter the water intake device main body 12 and settle in the water intake device main body 12, so that the mud drain pipe 18 is located at the bottom of the front surface just in case. Are arranged. When discharging the fine sand or the like that has settled in the water intake device main body 12, the raw water taken from the water intake screen 16 can be easily discharged by conducting the mud drain pipe 18 with the water intake port 19 closed. Can be done.

以上、本発明の一実施形態に係る取水装置１０の主な構成について詳述したが、本実施形態の取水装置１０には、取水装置本体１２の上方に、原水の流入側に張り出した流入板３０が配設され、この流入板３０上に、所定の間隔を空けて複数の整流突起３２が配設されていてもよい。流入板３０上に複数の整流突起３２を配設することによって、流入板３０によって取水スクリーン１６に導水される原水の流速を低下させつつ分散させて整流することができるため、取水スクリーン１６の全面を有効利用した取水が可能となり、取水効率の向上が図られる。なお、整流突起３２の形状は特に限定されず、図示したお椀型の他、取水装置１０の設置場所における原水の流速や流量等に応じて適宜、選択される。 The main configuration of the water intake device 10 according to the embodiment of the present invention has been described in detail above. 30 may be arranged, and a plurality of rectifying protrusions 32 may be arranged on the inflow plate 30 at predetermined intervals. By disposing a plurality of rectifying protrusions 32 on the inflow plate 30, the raw water guided to the intake screen 16 by the inflow plate 30 can be dispersed and rectified while reducing the flow velocity, so that the entire surface of the intake screen 16 can be rectified. It is possible to take water effectively and improve the water intake efficiency. The shape of the rectifying protrusion 32 is not particularly limited, and is appropriately selected according to the flow velocity, flow rate, and the like of raw water at the installation location of the water intake device 10, in addition to the bowl shape shown in the figure.

以上、本発明の取水装置の実施形態について詳述したが、本発明の技術的思想を実質的に限定するものと解してはならない。本発明はその要旨を逸脱しない範囲で、当業者の創意と工夫により、適宜に改良、変更又は追加をしながら実施できる。 Although the embodiment of the water intake device of the present invention has been described in detail above, it should not be understood that the technical idea of the present invention is substantially limited. The present invention can be carried out with appropriate improvements, changes or additions by the creativity and ingenuity of those skilled in the art without departing from the gist thereof.

１０：取水装置
１２：取水装置本体
１４：開口部
１６，Ｓ：取水スクリーン
１８：排泥管
１９：取水口
２０，４０：ワイヤ部材
２０ａ，４０ａ：上側に位置するワイヤ部材
２０ｂ，４０ｂ：下側に位置するワイヤ部材
２２，４２：下面
２４，４４：上面
３０：流入板
３２：整流突起
Ｆ，Ｇ：原水の流れ方向
ｆ，ｇ：取水方向

10: Water intake device 12: Water intake device main body 14: Opening 16, S: Water intake screen 18: Mud drain pipe 19: Water intake port 20, 40: Wire member 20a, 40a: Wire member 20b, 40b located on the upper side: Lower side Wire members located at 22, 42: Bottom surface 24, 44: Top surface 30: Inflow plate 32: Rectifying protrusions F, G: Raw water flow direction f, g: Water intake direction

Claims (2)

箱状の取水装置本体と、該取水装置本体の上方から前面にかけて形成された開口部を覆って配設される取水スクリーンと、を含んで構成される取水装置であって、
前記取水スクリーンが、水平状態にした四角柱状の複数のワイヤ部材を上方から斜め下方に向かって、上側に位置する該ワイヤ部材の下面と、下側に位置する該ワイヤ部材の上面とを平行にして所定の間隔を空けて並べて形成され、
前記下面と、前記上面との隙間から取水される原水の取水方向が、斜め上方に向かっていることを特徴とする取水装置。 A water intake device including a box-shaped water intake device main body and a water intake screen arranged so as to cover an opening formed from the upper side to the front surface of the water intake device main body.
The water intake screen makes a plurality of horizontally formed square columnar wire members parallel to the lower surface of the wire member located on the upper side and the upper surface of the wire member located on the lower side from above to diagonally downward. Formed side by side at predetermined intervals,
A water intake device characterized in that the intake direction of raw water taken from the gap between the lower surface and the upper surface is diagonally upward. 前記取水装置本体の上方に、原水の流入側に張り出した流入板が配設され、
前記流入板上に、所定の間隔を空けて複数の整流突起が配設されていることを特徴とする請求項１に記載の取水装置。 An inflow plate overhanging the inflow side of the raw water is arranged above the main body of the water intake device.
The water intake device according to claim 1, wherein a plurality of rectifying protrusions are arranged on the inflow plate at predetermined intervals.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0874232A (en) * 1994-09-07 1996-03-19 Nippon Enjiniya Kk Device for taking in surface stream from back
JP2000213010A (en) * 1999-01-27 2000-08-02 Toyo Screen Kogyo Kk Inclined screen for water intake of mountain stream
JP3123561U (en) * 2006-05-10 2006-07-20 幸三 野村 Filter for water intake device and water intake device
JP2013100687A (en) * 2011-11-09 2013-05-23 Koa Corp Water intake apparatus
JP2015010467A (en) * 2013-07-01 2015-01-19 株式会社サンエイ Intake device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0874232A (en) * 1994-09-07 1996-03-19 Nippon Enjiniya Kk Device for taking in surface stream from back
JP2000213010A (en) * 1999-01-27 2000-08-02 Toyo Screen Kogyo Kk Inclined screen for water intake of mountain stream
JP3123561U (en) * 2006-05-10 2006-07-20 幸三 野村 Filter for water intake device and water intake device
JP2013100687A (en) * 2011-11-09 2013-05-23 Koa Corp Water intake apparatus
JP2015010467A (en) * 2013-07-01 2015-01-19 株式会社サンエイ Intake device

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