JP6318384B2 - Water shielding device - Google Patents
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- JP6318384B2 JP6318384B2 JP2014248466A JP2014248466A JP6318384B2 JP 6318384 B2 JP6318384 B2 JP 6318384B2 JP 2014248466 A JP2014248466 A JP 2014248466A JP 2014248466 A JP2014248466 A JP 2014248466A JP 6318384 B2 JP6318384 B2 JP 6318384B2
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
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Description
本発明は、建造物の開口部を流れようとする水の流れを遮断するための遮水装置に関する。 The present invention relates to a water shielding device for blocking the flow of water that attempts to flow through an opening of a building.
特許文献１には、高潮や津波の被害を防ぐための防潮装置が記載されている。この防潮装置は、水の流れを遮断するための遮水装置の一種であり、地盤面下に形成された地中ピットと、地中ピットに収納された浮きおよび防潮板とを備えている。高潮や津波が発生した際に地中ピットに水が流入すると、浮きおよび防潮板が水の浮力で浮上し、防潮板が地中ピットの上方の通路に突出して水の流れを遮断する。 Patent Document 1 describes a tide apparatus for preventing damage from storm surges and tsunamis. This tide apparatus is a kind of a water-impervious apparatus for blocking the flow of water, and includes an underground pit formed below the ground surface, and a floating and tide plate stored in the underground pit. When water flows into the underground pit when a storm surge or tsunami occurs, the floating and tide plates rise due to the buoyancy of the water, and the tide plates protrude into the passage above the underground pit and block the flow of water.
特許文献１に記載された防潮装置では、地中ピットの天井壁に、水の流入口と防潮板の出入口が設けられていたので、地盤面においてこれらの設置スペースを広く確保しなければならなかった。そのため、防潮装置を階段に設置することが困難であり、階段スペースを有効活用できないという問題があった。また、流入口は、上方に向けて開かれているため、流入口から雨水等が浸入し易いという問題があった。 In the tide apparatus described in Patent Document 1, since the water inflow port and the tide plate entrance / exit are provided on the ceiling wall of the underground pit, it is necessary to secure a wide installation space on the ground surface. It was. Therefore, it is difficult to install the tide apparatus on the stairs, and there is a problem that the stairs space cannot be effectively used. Moreover, since the inflow port is opened upward, there has been a problem that rainwater or the like easily enters from the inflow port.
本発明は、上記問題に対処するためになされたものであり、階段スペースを有効活用して設置できるとともに、導水口からの雨水の浸入を抑制できる、遮水装置を提供することを目的とする。 The present invention has been made to address the above-described problems, and an object of the present invention is to provide a water shielding device that can be installed by effectively utilizing a staircase space and can suppress the intrusion of rainwater from a water inlet. .
上記目的を達成するため、本発明の特徴は、複数の段差部を有する階段の一部を構成するとともに、前記階段を下から上に流れようとする水の流れを遮断する遮水装置であって、前記階段の踏み面を構成する踏み面構成部と、前記踏み面構成部の鉛直下方に設けられた貯水ピットと、前記踏み面構成部よりも下方の前記階段の蹴込み面に設けられ、前記貯水ピットに前記水を導入するための導水口と、前記貯水ピットに収容され、前記貯水ピットに導入された前記水の浮力で浮上して、前記踏み面構成部を持ち上げながら前記貯水ピットから上方に突出する遮水部材とを備え、前記導水口は、下から２段目以上の前記段差部の前記蹴込み面に設けられていることにある。 In order to achieve the above object, a feature of the present invention is a water shielding device that constitutes a part of a staircase having a plurality of stepped portions and blocks a flow of water that attempts to flow up the staircase from below. The tread surface constituting portion constituting the tread surface of the staircase, the water storage pit provided vertically below the tread surface constituting portion, and the kick surface of the staircase below the tread surface constituting portion. A water inlet for introducing the water into the water storage pit, and the water storage pit while being lifted by the buoyancy of the water contained in the water storage pit and introduced into the water storage pit and lifting the tread surface component and a water-impervious member protruding upwardly from said water guide port is in Rukoto provided on the riser surface of the stepped portion of the two or more stages from the bottom.
この構成では、踏み面構成部の鉛直下方に貯水ピットが設けられており、踏み面構成部よりも下方の蹴込み面に導水口が設けられているので、階段のスペースを有効活用して遮水装置を設置できる。また、導水口を歩道等の地表面から上方に離して配置できるので、地表面を流れる水が導水口に浸入することを防止できるとともに、地表面に存在するゴミ等が導水口に詰まることを防止できる。さらに、導水口は、蹴込み面に設けられているので、導水口から雨水が直接浸入することを抑制できる。 In this configuration, a water storage pit is provided vertically below the tread component, and a water inlet is provided on the kick surface below the tread component. A water device can be installed. In addition, since the water inlet can be arranged away from the ground surface such as a sidewalk , water flowing on the ground surface can be prevented from entering the water inlet, and dust existing on the ground surface can be blocked by the water inlet. Can be prevented. Furthermore, since the water inlet is provided on the kick-in surface, it is possible to prevent rainwater from entering directly from the water inlet.
本発明の他の特徴は、前記踏み面構成部における前記水の流れの上流側の端部を下方から受ける第１受け部と、前記階段の幅方向に間隔を隔てて設けられ、前記第１受け部を下方から支持する複数の脚部とを備え、前記導水口は、隣り合う２つの前記脚部の間に設けられていることにある。 Another feature of the present invention is that the first receiving portion that receives the upstream end of the water flow in the tread surface constituting portion from below and the first step receiving portion spaced apart in the width direction of the staircase, A plurality of legs that support the receiving part from below, and the water inlet is provided between two adjacent legs.
この構成では、隣り合う２つの脚部の間に導水口が設けられるので、導水口の開口面積を広く確保できる。 In this configuration, since the water inlet is provided between two adjacent leg portions, a wide opening area of the water inlet can be secured.
本発明の他の特徴は、前記導水口は、前記蹴込み面を構成する蹴込み板に形成された複数の貫通孔を有していることにある。 Another feature of the present invention is that the water inlet has a plurality of through holes formed in a kick plate constituting the kick surface.
この構成では、導水口からゴミ等が入り込むことを抑制できる。 In this structure, it can suppress that dust etc. enter from a water inlet.
本発明の他の特徴は、複数の前記段差部は、地表面から建造物の開口部に向かって段階的に高くなるように形成されており、前記貯水ピットの一部は前記建造物の外壁部で構成されていることにある。 Another feature of the present invention is that the plurality of stepped portions are formed so as to increase stepwise from the ground surface toward the opening of the building, and a part of the water storage pit is an outer wall of the building It consists of parts.
この構成では、貯水ピットの一部が建造物の外壁部で構成されるので、貯水ピットの材料を節約でき、施工コストを低く抑えることができる。 In this configuration, since a part of the water storage pit is formed by the outer wall portion of the building, the material for the water storage pit can be saved, and the construction cost can be kept low.
本発明の他の特徴は、前記踏み面構成部における前記水の流れの下流側の端部を下方から受ける第２受け部と、前記第２受け部を前記貯水ピットの底部に固定するための固定手段とを備えることにある。 Another feature of the present invention is that the second receiving portion that receives the downstream end of the water flow in the tread surface constituting portion from below, and the second receiving portion for fixing the second receiving portion to the bottom of the water storage pit. And a fixing means.
この構成では、第２受け部を貯水ピットの底部に固定できるので、外壁部の強度が不足する場合でも、第２受け部を確実に支持できる。 In this configuration, since the second receiving portion can be fixed to the bottom of the water storage pit, the second receiving portion can be reliably supported even when the strength of the outer wall portion is insufficient.
本発明の他の特徴は、前記踏み面構成部における前記水の流れの下流側の端部を下方から受ける第２受け部と、前記第２受け部を前記外壁部に固定するための固定手段とを備えることにある。 Another feature of the present invention is that a second receiving portion that receives the downstream end of the water flow in the tread surface constituting portion from below, and a fixing means for fixing the second receiving portion to the outer wall portion. It is in providing.
この構成では、第２受け部を外壁部に固定できるので、貯水ピットの底部にまで第２受け部を延ばして形成する必要がなく、第２受け部の材料を節約でき、施工コストを低く抑えることができる。 In this configuration, since the second receiving portion can be fixed to the outer wall portion, there is no need to form the second receiving portion extending to the bottom of the water storage pit, the material of the second receiving portion can be saved, and the construction cost can be kept low. be able to.
以下、本発明に係る遮水装置の実施形態について図面を参照しながら説明する。 Hereinafter, an embodiment of a water-impervious device according to the present invention will be described with reference to the drawings.
図１は、本発明の一実施形態に係る遮水装置１０の構成を示す鉛直断面図である。図１に示すように、遮水装置１０は、階段１２の一部を構成するとともに、階段１２を下から上に流れようとする水の流れを遮断するものである。大雨、洪水および津波等の際に、地表面Ｇに溢れ出た水の水位が上昇すると、その水は、階段１２を下から上に流れて（すなわち階段１２に沿って増水して）建造物１４の開口部１６に向かおうとする。遮水装置１０は、開口部１６に向かおうとする水の流れを階段１２の途中で遮断できるように構成されている。 FIG. 1 is a vertical sectional view showing a configuration of a water shielding device 10 according to an embodiment of the present invention. As shown in FIG. 1, the water-impervious device 10 constitutes a part of the stairs 12 and blocks the flow of water that attempts to flow up the stairs 12 from below. When the water level overflowing the ground surface G rises during heavy rain, flood, tsunami, etc., the water flows down the stairs 12 (ie, increases along the stairs 12). It tries to go to 14 openings 16. The water shielding device 10 is configured to block the flow of water that is going to the opening 16 in the middle of the stairs 12.
図２は、遮水装置１０の一部の構成を示す斜視図である。以下の説明で用いる方向の概念は、図２に示す矢印の方向を基準とする。つまり、階段１２における水の流れの上流側を「前」、階段１２における水の流れの下流側を「後」、前側から見て左側を「左」、前側から見て右側を「右」とする。階段１２および遮水装置１０は、左右対称に構成されているため、以下では、これらの構成を右側の部分に着目して説明する。 FIG. 2 is a perspective view showing a configuration of a part of the water shielding device 10. The concept of direction used in the following description is based on the direction of the arrow shown in FIG. That is, the upstream side of the water flow in the stairs 12 is “front”, the downstream side of the water flow in the stairs 12 is “rear”, the left side when viewed from the front side is “left”, and the right side when viewed from the front side is “right”. To do. Since the staircase 12 and the water shielding apparatus 10 are configured symmetrically, the following description will be made focusing on the right part.
図１に示す建造物１４は、鉄筋コンクリートからなるビルであり、外壁部１８とスラブ２０とを有している。外壁部１８の少なくとも一部は、地表面Ｇよりも下方に配置されており、外壁部１８の表面１８ａは、水平面に対して直交する平坦面に形成されている。なお、建造物１４は、ビルに限定されるものではなく、マンションや倉庫等であってもよい。 A building 14 shown in FIG. 1 is a building made of reinforced concrete, and has an outer wall portion 18 and a slab 20. At least a part of the outer wall portion 18 is disposed below the ground surface G, and the surface 18a of the outer wall portion 18 is formed as a flat surface orthogonal to the horizontal plane. The building 14 is not limited to a building, and may be a condominium, a warehouse, or the like.
図１に示すように、階段１２は、地表面Ｇから建造物１４の開口部１６に向かって段階的に高くなる複数（本実施形態では４段）の段差部２４ａ〜２４ｄを有している。各段差部２４ａ〜２４ｄは、踏み面２６と、踏み面２６よりも下方に設けられた蹴込み面２８とを有している。本実施形態では、下から１段目の段差部２４ａ、２段目の段差部２４ｂおよび４段目の段差部２４ｄがコンクリートで形成されており、下から３段目（上から２段目）の段差部２４ｃが遮水装置１０で構成されている。階段１２の幅方向両端部（左右方向両端部）には、コンクリートからなる壁部３０が、建造物１４と水密的に連続するように設けられている。なお、遮水装置１０で構成される段差部は、下から３段目（上から２段目）の段差部２４ｃに限定されるものではなく、１段目の段差部２４ａ、２段目の段差部２４ｂおよび４段目の段差部２４ｄのいずれであってもよい。 As shown in FIG. 1, the staircase 12 has a plurality of step portions 24 a to 24 d (four steps in this embodiment) that gradually increase from the ground surface G toward the opening 16 of the building 14. . Each of the step portions 24 a to 24 d has a tread surface 26 and a kick surface 28 provided below the tread surface 26. In the present embodiment, the first step portion 24a from the bottom, the second step portion 24b, and the fourth step portion 24d are formed of concrete, and the third step from the bottom (second step from the top). The step portion 24 c is constituted by the water shielding device 10. At both ends in the width direction of the staircase 12 (both ends in the left-right direction), wall portions 30 made of concrete are provided so as to be watertight and continuous with the building 14. Note that the stepped portion constituted by the water shielding device 10 is not limited to the stepped portion 24c of the third step from the bottom (second step from the top), but the first stepped portion 24a and the second stepped portion 24c. Either the stepped portion 24b or the stepped portion 24d at the fourth step may be used.
図１に示すように、遮水装置１０は、踏み面構成部３４と、遮水部材３６と、貯水ピット３８と、遮水装置１０の幅方向両端部（左右方向両端部）を水の流れの下流側から受ける左右一対の支柱４０とを有している。 As shown in FIG. 1, the water-impervious device 10 is configured such that the tread surface constituting portion 34, the water-impervious member 36, the water storage pit 38, and the width direction both ends (both ends in the left-right direction) of the water-impermeable device 10 And a pair of left and right support columns 40 received from the downstream side.
図１に示す踏み面構成部３４は、階段１２の踏み面２６を構成する部分であり、ステンレス等によって平面視で左右方向に延びる長方形の板状に形成されている。本実施形態では、下から３段目（上から２段目）の踏み面２６が、踏み面構成部３４で構成されており、踏み面構成部３４の下面には、遮水部材３６が接続されている。 The tread surface constituting portion 34 shown in FIG. 1 is a portion constituting the tread surface 26 of the staircase 12 and is formed of a stainless steel plate or the like in a rectangular plate shape extending in the left-right direction in plan view. In the present embodiment, the tread surface 26 of the third step from the bottom (second step from the top) is configured by the tread surface constituting portion 34, and the water shielding member 36 is connected to the lower surface of the tread surface constituting portion 34. Has been.
図３は、図１に示す遮水装置１０の主要部の構成を示す拡大断面図である。図４は、支柱４０および遮水部材３６の構成を示す水平断面図である。図３に示す遮水部材３６は、貯水ピット３８に収容され、貯水ピット３８に導入された水の浮力で浮上して、踏み面構成部３４を持ち上げながら貯水ピット３８から上方に突出するように構成されている。以下には、遮水部材３６の構成をより具体的に説明する。 FIG. 3 is an enlarged cross-sectional view illustrating a configuration of a main part of the water shielding device 10 illustrated in FIG. 1. FIG. 4 is a horizontal cross-sectional view showing the configuration of the support column 40 and the water shielding member 36. The water shielding member 36 shown in FIG. 3 is accommodated in the water storage pit 38, and is lifted by the buoyancy of the water introduced into the water storage pit 38 so as to protrude upward from the water storage pit 38 while lifting the tread surface component 34. It is configured. Below, the structure of the water-impervious member 36 will be described more specifically.
図３に示すように、遮水部材３６は、ステンレス、アルミニウム合金、繊維強化プラスチック等のような高強度の材料で形成された筐体状の本体部４２を有しており、本体部４２の内部空間には、浮力および強度を得るために発泡樹脂４４が充填されている。遮水部材３６の高さ（上下方向長さ）は、遮水部材３６が水の浮力で浮上したときに、遮水部材３６の上端が最高水位よりも上方に位置するように定められている。遮水部材３６の幅（左右方向長さ）は、踏み面構成部３４の幅（左右方向長さ）よりも大きくされている。踏み面構成部３４の下面に遮水部材３６が接続された状態において、踏み面構成部３４の前後方向両端部は、遮水部材３６から前後方向に突出し、かつ、踏み面構成部３４の左右方向両端部は、遮水部材３６から左右方向に突出する。 As shown in FIG. 3, the water-impervious member 36 has a housing-like main body portion 42 formed of a high-strength material such as stainless steel, aluminum alloy, fiber reinforced plastic, and the like. The internal space is filled with foamed resin 44 to obtain buoyancy and strength. The height (vertical length) of the water-impervious member 36 is determined so that the upper end of the water-impervious member 36 is located above the maximum water level when the water-impervious member 36 floats with the buoyancy of water. . The width (length in the left-right direction) of the water-impervious member 36 is made larger than the width (length in the left-right direction) of the tread surface component 34. In a state where the water shielding member 36 is connected to the lower surface of the tread surface constituting portion 34, both front and rear direction end portions of the tread surface constituting portion 34 protrude in the front and rear direction from the water shielding member 36, and left and right of the tread surface constituting portion 34. Both ends in the direction protrude from the water shielding member 36 in the left-right direction.
図１に示すように、遮水部材３６の前面３６ａにおける左右方向両端部には、前面３６ａと貯水ピット３８の内面との間に隙間を確保するための複数（本実施形態では２つ）のスペーサー部材４６が上下方向に間隔を隔てて設けられている。遮水部材３６の後面３６ｂにおける左右方向両端部には、後面３６ｂと貯水ピット３８の内面との間に隙間を確保するための複数（本実施形態では２つ）のスペーサー部材４８が上下方向に間隔を隔てて設けられている。 As shown in FIG. 1, a plurality (two in this embodiment) for securing a gap between the front surface 36 a and the inner surface of the water storage pit 38 at both ends in the left-right direction of the front surface 36 a of the water shielding member 36. Spacer members 46 are provided at intervals in the vertical direction. A plurality (two in this embodiment) of spacer members 48 for securing a gap between the rear surface 36b and the inner surface of the water storage pit 38 are provided in the vertical direction at both left and right ends of the rear surface 36b of the water shielding member 36. It is provided at intervals.
図３および図４に示すように、スペーサー部材４６および４８は、左右方向に延びる半円柱状に形成されており、これらの平坦面が前面３６ａおよび後面３６ｂに接触した状態で遮水部材３６に取り付けられている。スペーサー部材４６および４８の材質は、特に限定されるものではないが、本実施形態では、ゴム等のような緩衝性を有する材料が用いられている。図１に示すように、遮水部材３６の前面３６ａにおける左右方向両端部の下部には、突起部５０が設けられており、突起部５０には、上方に向かうにつれて前面３６ａからの高さが低くなる（水平方向距離が短くなる）傾斜面５０ａが形成されている。突起部５０の最高部の高さは、スペーサー部材４６の最高部の高さよりも低くされている。 As shown in FIGS. 3 and 4, the spacer members 46 and 48 are formed in a semi-cylindrical shape extending in the left-right direction, and the water-impervious member 36 is in a state where these flat surfaces are in contact with the front surface 36a and the rear surface 36b. It is attached. The material of the spacer members 46 and 48 is not particularly limited, but in the present embodiment, a material having a buffer property such as rubber is used. As shown in FIG. 1, a protrusion 50 is provided at the lower part of both end portions in the left-right direction on the front surface 36 a of the water-impervious member 36, and the height from the front surface 36 a increases toward the protrusion 50. An inclined surface 50a that is lowered (the distance in the horizontal direction is shortened) is formed. The height of the highest portion of the protrusion 50 is set lower than the height of the highest portion of the spacer member 46.
図３に示すように、貯水ピット３８は、通常時に遮水部材３６を収容するとともに、大雨、洪水および津波等の発生時に、地表面Ｇ（図１）に溢れ出た水を貯留する部分であり、踏み面構成部３４の鉛直下方に設けられている。貯水ピット３８の後壁部５２は、建造物１４（図１）の外壁部１８で構成されており、貯水ピット３８の前壁部５４および左右の側壁部５６は、階段１２と一体となるようにコンクリートで形成されている。また、図１に示すように、貯水ピット３８の底部５８は、前壁部５４と一体となるようにコンクリートで形成されており、底部５８には、鉛直方向に延びるアンカーボルト６０の下端部が埋め込まれて固定されている。さらに、前壁部５４には、貯水ピット３８に貯留された水を排出するための排水管６２が設けられており、排水管６２の上流側端部が貯水ピット３８に接続されている。 As shown in FIG. 3, the water storage pit 38 accommodates the water-impervious member 36 at the normal time, and stores water overflowing on the ground surface G (FIG. 1) when heavy rain, flood, tsunami, etc. occur. Yes, and provided vertically below the tread component 34. The rear wall portion 52 of the water storage pit 38 is configured by the outer wall portion 18 of the building 14 (FIG. 1), and the front wall portion 54 and the left and right side wall portions 56 of the water storage pit 38 are integrated with the stairs 12. It is made of concrete. As shown in FIG. 1, the bottom 58 of the water storage pit 38 is made of concrete so as to be integrated with the front wall 54, and the bottom 58 has a lower end of an anchor bolt 60 extending in the vertical direction. Embedded and fixed. Further, a drain pipe 62 for discharging water stored in the water storage pit 38 is provided on the front wall portion 54, and an upstream end of the drain pipe 62 is connected to the water storage pit 38.
図１に示すように、支柱４０は、遮水部材３６の左右方向端部（幅方向端部）を支持する溝状部材である。建造物１４と連続する壁部３０には、鉛直方向に延びる凹部３０ａが形成されており、支柱４０は、凹部３０ａの内面にボルト等の固定手段（図示省略）で固定されている。以下には、支柱４０の構成をより具体的に説明する。 As shown in FIG. 1, the support column 40 is a groove-like member that supports the left and right end portions (width direction end portions) of the water shielding member 36. A concave portion 30a extending in the vertical direction is formed in the wall portion 30 continuous with the building 14, and the support column 40 is fixed to the inner surface of the concave portion 30a by a fixing means (not shown) such as a bolt. Below, the structure of the support | pillar 40 is demonstrated more concretely.
図４に示すように、支柱４０は、遮水部材３６の前面３６ａに対向するように配置された前壁部４０ａと、遮水部材３６の後面３６ｂに対向するように配置された後壁部４０ｂと、遮水部材３６の左右方向端面（幅方向端面）３６ｃに対向するように配置された側壁部４０ｃとを有している。支柱４０における階段１２（図１）の中央側の端部には、開口部６４が設けられている。遮水部材３６の左右方向端部（幅方向端部）は、開口部６４から支柱４０の内側空間Ｓ１に挿入されている。支柱４０の後壁部４０ｂには、遮水部材３６に設けられたスペーサー部材４８を収容するための複数（本実施形態では２つ）の凹部６６が、上下方向に間隔を隔てて形成されている。後壁部４０ｂにおける凹部６６よりも開口部６４側の部分には、鉛直方向に延びる線状の第１止水部材６８が、複数のボルト７０を用いて固定されている。 As shown in FIG. 4, the support column 40 includes a front wall portion 40 a disposed so as to face the front surface 36 a of the water shielding member 36, and a rear wall portion disposed so as to face the rear surface 36 b of the water shielding member 36. 40b and the side wall part 40c arrange | positioned so that the horizontal direction end surface (width direction end surface) 36c of the water-impervious member 36 may be opposed. An opening 64 is provided at the end of the column 40 on the center side of the staircase 12 (FIG. 1). An end portion in the left-right direction (width direction end portion) of the water shielding member 36 is inserted into the inner space S <b> 1 of the support column 40 from the opening 64. A plurality of (two in the present embodiment) recesses 66 are formed in the rear wall portion 40b of the support column 40 at intervals in the vertical direction for accommodating the spacer member 48 provided in the water shielding member 36. Yes. A linear first water stop member 68 extending in the vertical direction is fixed to the portion of the rear wall portion 40 b closer to the opening 64 than the recess 66 using a plurality of bolts 70.
図３に示すように、支柱４０の前壁部４０ａにおける踏み面２６よりも下方に位置する部分には、遮水部材３６に形成された突起部５０の傾斜面５０ａ（図１）を後方に押すための押圧部７２が設けられている。押圧部７２は、左右方向に延びる円筒状の当接部７２ａと、当接部７２ａに対して垂直に設けられた雄ねじ部７２ｂとを有している。図４に示すように、雄ねじ部７２ｂには、第１ナット７４ａが螺合されており、雄ねじ部７２ｂにおける第１ナット７４ａよりも先端側の部分が、前壁部４０ａに形成された貫通孔４１に挿通されて、第２ナット７４ｂに螺合されている。 As shown in FIG. 3, the inclined surface 50 a (FIG. 1) of the protrusion 50 formed on the water-impervious member 36 is rearward at a portion of the front wall portion 40 a of the support column 40 located below the tread surface 26. A pressing portion 72 for pressing is provided. The pressing portion 72 includes a cylindrical contact portion 72a extending in the left-right direction and a male screw portion 72b provided perpendicular to the contact portion 72a. As shown in FIG. 4, a first nut 74a is screwed into the male screw portion 72b, and a portion of the male screw portion 72b on the front end side of the first nut 74a is a through hole formed in the front wall portion 40a. 41 and threaded into the second nut 74b.
また、図３に示すように、遮水装置１０は、踏み面構成部３４における水の流れの上流側の端部（前端部）３４ａを下方から受ける第１受け部８０と、第１受け部８０を下方から支持する複数の脚部８２と、貯水ピット３８に水を導入するための導水口８４とを備えている。 Moreover, as shown in FIG. 3, the water-impervious device 10 includes a first receiving portion 80 that receives an upstream end (front end) 34a of the water flow in the tread surface constituting portion 34 from below, and a first receiving portion. A plurality of legs 82 for supporting 80 from below and a water inlet 84 for introducing water into the water storage pit 38 are provided.
図５は、第１受け部８０および脚部８２の構成を示す分解斜視図である。図５に示す第１受け部８０は、一般にチャンネルと称される溝形鋼であり、その開口部８６を下方に向けて左右方向に延びて設けられている。第１受け部８０は、前後方向において互いに対向する前壁部８０ａおよび後壁部８０ｂと、これらの上端縁どうしを連結する上壁部８０ｃとを有している。上壁部８０ｃの上面の後端部には、ゴム等の弾性材料からなる帯状の第１緩衝材８８が左右方向に延びて設けられている。上壁部８０ｃの上面の前端部には、溝形鋼からなる段差解消部材９０が、その開口部９２を下方に向けて左右方向に延びて設けられている。図３に示すように、通常時には、踏み面構成部３４の前端部３４ａが第１緩衝材８８に載置されている。段差解消部材９０の高さ（上下方向長さ）は、その上面と第１緩衝材８８に載置された踏み面構成部３４の上面とが面一になるように定められている。 FIG. 5 is an exploded perspective view showing the configuration of the first receiving part 80 and the leg part 82. The first receiving portion 80 shown in FIG. 5 is a groove steel generally called a channel, and is provided extending in the left-right direction with its opening 86 facing downward. The 1st receiving part 80 has the front wall part 80a and the rear wall part 80b which mutually oppose in the front-back direction, and the upper wall part 80c which connects these upper end edges. A band-shaped first cushioning material 88 made of an elastic material such as rubber is provided at the rear end portion of the upper surface of the upper wall portion 80c so as to extend in the left-right direction. At the front end portion of the upper surface of the upper wall portion 80c, a step eliminating member 90 made of channel steel is provided extending in the left-right direction with its opening 92 facing downward. As shown in FIG. 3, at the normal time, the front end portion 34 a of the tread surface constituting portion 34 is placed on the first cushioning material 88. The height (length in the vertical direction) of the step eliminating member 90 is determined so that the upper surface thereof is flush with the upper surface of the tread surface constituting portion 34 placed on the first cushioning material 88.
図５に示すように、複数（図５では１つだけを示している。）の脚部８２は、第１受け部８０と同種の溝形鋼で形成されており、階段１２の幅方向（左右方向）に間隔を隔てて設けられている。脚部８２は、前後方向において互いに対向する前壁部８２ａおよび後壁部８２ｂと、これらの右端縁（または左端縁）どうしを連結する側壁部８２ｃとを有している。前壁部８２ａおよび後壁部８２ｂの上端部は、第１受け部８０における前壁部８０ａおよび後壁部８０ｂの高さ（上下方向長さ）分だけ切除されている。側壁部８２ｃの下端部には、水を通過させるための半円状の切欠き部９６が形成されている。図３に示すように、側壁部８２ｃの上端部は、開口部８６から第１受け部８０の内側空間Ｓ２に挿入されており、側壁部８２ｃと第１受け部８０とが溶接等によって接合されている。なお、図５に示す切欠き部９６の形状は、半円状に限定されるものではなく、三角状、四角状およびスリット状等であってもよい。 As shown in FIG. 5, a plurality of leg portions 82 (only one is shown in FIG. 5) are formed of the same type of channel steel as the first receiving portion 80, and the width direction of the stairs 12 ( Left and right direction). The leg part 82 has a front wall part 82a and a rear wall part 82b that face each other in the front-rear direction, and a side wall part 82c that connects these right end edges (or left end edges). The upper end portions of the front wall portion 82a and the rear wall portion 82b are cut away by the height (vertical direction length) of the front wall portion 80a and the rear wall portion 80b in the first receiving portion 80. A semicircular cutout portion 96 for allowing water to pass therethrough is formed at the lower end portion of the side wall portion 82c. As shown in FIG. 3, the upper end portion of the side wall portion 82c is inserted into the inner space S2 of the first receiving portion 80 from the opening 86, and the side wall portion 82c and the first receiving portion 80 are joined by welding or the like. ing. The shape of the notch 96 shown in FIG. 5 is not limited to a semicircular shape, and may be a triangular shape, a square shape, a slit shape, or the like.
図２に示すように、階段１２の２段目の段差部２４ｂにおける踏み面２６よりも後方には、踏み面２６から一段低くなるように段差部９８が形成されている。図３に示すように、側壁部８２ｃの下端部は、段差部９８の上面に載置されて、段差部９８または段差部２４ｂにボルト等の固定手段（図示省略）で固定されている。脚部８２の前面には、複数の貫通孔１００ａを有する蹴込み板１００が設けられており、蹴込み板１００で蹴込み面２８が構成されている。 As shown in FIG. 2, a stepped portion 98 is formed behind the stepped surface 26 in the second stepped portion 24 b of the stairs 12 so as to be one step lower than the stepped surface 26. As shown in FIG. 3, the lower end portion of the side wall portion 82c is placed on the upper surface of the stepped portion 98, and is fixed to the stepped portion 98 or the stepped portion 24b by a fixing means (not shown) such as a bolt. A kick plate 100 having a plurality of through holes 100 a is provided on the front surface of the leg portion 82, and the kick surface 28 is configured by the kick plate 100.
図３に示す導水口８４は、貯水ピット３８に水を導入するための開口部であり、踏み面構成部３４よりも下方の階段１２の蹴込み面２８における互いに隣り合う２つの脚部８２間に設けられている。本実施形態の導水口８４は、蹴込み板１００に形成された複数の貫通孔１００ａを有しており、導水口８４と貯水ピット３８とが、導水口８４の下流側に設けられた導水路１０２を介して連通されている。なお、導水口８４が地表面Ｇ（図１）に近接していると、地表面Ｇに存在するゴミ等が導水口８４に詰まり易いため、導水口８４は、下から２段目以上の段差部の蹴込み面２８に設けられることが望ましい。 The water inlet 84 shown in FIG. 3 is an opening for introducing water into the water storage pit 38, and is between the two leg portions 82 adjacent to each other on the kick surface 28 of the stairs 12 below the tread component portion 34. Is provided. The water conduit 84 of the present embodiment has a plurality of through holes 100 a formed in the kick plate 100, and the water conduit 84 and the water storage pit 38 are provided on the downstream side of the water conduit 84. Communicating via 102. If the water inlet 84 is close to the ground surface G (FIG. 1), dust or the like existing on the ground surface G easily clogs the water inlet 84. It is desirable to be provided on the kick surface 28 of the part.
また、図１に示すように、遮水装置１０は、踏み面構成部３４における水の流れの下流側の端部（後端部）３４ｂを下方から受ける第２受け部１０４と、第２受け部１０４を貯水ピット３８の底部５８に固定するための固定手段１０６とを備えている。 Moreover, as shown in FIG. 1, the water-impervious device 10 includes a second receiving portion 104 that receives a downstream end portion (rear end portion) 34b of the water flow in the tread surface constituting portion 34, and a second receiving portion. And fixing means 106 for fixing the portion 104 to the bottom 58 of the water storage pit 38.
図２に示すように、第２受け部１０４は、外壁部１８の表面１８ａに沿って水平方向に延びて設けられた上側水平部１０８および下側水平部１１０と、外壁部１８の表面１８ａに沿って鉛直方向に延びて設けられた複数の鉛直部１１２とを有している。上側水平部１０８、下側水平部１１０および複数の鉛直部１１２は、一般にチャンネルと称される溝形鋼で形成されている。 As shown in FIG. 2, the second receiving portion 104 is provided on the upper horizontal portion 108 and the lower horizontal portion 110 provided in the horizontal direction along the surface 18 a of the outer wall portion 18, and on the surface 18 a of the outer wall portion 18. And a plurality of vertical portions 112 provided so as to extend in the vertical direction. The upper horizontal portion 108, the lower horizontal portion 110, and the plurality of vertical portions 112 are formed of channel steel generally referred to as a channel.
図６は、第２受け部１０４の構成を示す斜視図である。図６に示すように、上側水平部１０８は、上下方向において互いに対向する上壁部１０８ａおよび下壁部１０８ｂと、これらの前端縁どうしを連結する前壁部１０８ｃとを有している。下側水平部１１０は、上下方向において互いに対向する上壁部１１０ａおよび下壁部１１０ｂと、これらの前端縁どうしを連結する前壁部１１０ｃとを有している。上壁部１１０ａおよび下壁部１１０ｂには、アンカーボルト６０が挿通される貫通孔１１４ａおよび１１４ｂが形成されている。鉛直部１１２は、左右方向において互いに対向する右壁部１１２ａおよび左壁部１１２ｂと、これらの後端縁どうしを連結する後壁部１１２ｃとを有している。鉛直部１１２の上端部と上側水平部１０８とが溶接等によって接合されており、鉛直部１１２の下端部と下側水平部１１０とが溶接等によって接合されている。 FIG. 6 is a perspective view showing the configuration of the second receiving portion 104. As shown in FIG. 6, the upper horizontal portion 108 includes an upper wall portion 108a and a lower wall portion 108b that face each other in the vertical direction, and a front wall portion 108c that connects these front end edges. The lower horizontal portion 110 has an upper wall portion 110a and a lower wall portion 110b that face each other in the vertical direction, and a front wall portion 110c that connects these front end edges. Through holes 114a and 114b through which the anchor bolts 60 are inserted are formed in the upper wall portion 110a and the lower wall portion 110b. The vertical portion 112 includes a right wall portion 112a and a left wall portion 112b that face each other in the left-right direction, and a rear wall portion 112c that connects these rear end edges. The upper end portion of the vertical portion 112 and the upper horizontal portion 108 are joined by welding or the like, and the lower end portion of the vertical portion 112 and the lower horizontal portion 110 are joined by welding or the like.
図６に示すように、固定手段１０６は、第２受け部１０４を貯水ピット３８の底部５８に固定するものであり、アンカーボルト６０と、アンカーボルト６０に螺合されるナット１１６とを有している。第２受け部１０４を底部５８に固定する際には、下側水平部１１０が底部５８に載置されるとともに、下側水平部１１０の貫通孔１１４ａ，１１４ｂにアンカーボルト６０が挿通される。そして、上側の貫通孔１１４ａから上方に突出したアンカーボルト６０にナット１１６が螺合される。 As shown in FIG. 6, the fixing means 106 fixes the second receiving portion 104 to the bottom 58 of the water storage pit 38, and includes an anchor bolt 60 and a nut 116 that is screwed to the anchor bolt 60. ing. When fixing the second receiving portion 104 to the bottom portion 58, the lower horizontal portion 110 is placed on the bottom portion 58, and the anchor bolt 60 is inserted into the through holes 114 a and 114 b of the lower horizontal portion 110. Then, the nut 116 is screwed onto the anchor bolt 60 protruding upward from the upper through hole 114a.
図６に示すように、複数の鉛直部１１２のそれぞれには、貫通孔（図示省略）が形成されており、第２受け部１０４は、この貫通孔に挿通されたボルト１１８で外壁部１８に固定されている。 As shown in FIG. 6, each of the plurality of vertical portions 112 is formed with a through hole (not shown), and the second receiving portion 104 is formed on the outer wall portion 18 with a bolt 118 inserted through the through hole. It is fixed.
図３に示すように、上側水平部１０８における上壁部１０８ａの上面には、ゴム等の弾性材料からなる帯状の第２緩衝材１２０が左右方向に延びて設けられている。通常時には、踏み面構成部３４の後端部３４ｂが第２緩衝材１２０に載置されている。第２緩衝材１２０の高さ（上下方向長さ）は、その上面と第１緩衝材８８の上面とが同じ高さになるように定められている。 As shown in FIG. 3, a belt-like second cushioning material 120 made of an elastic material such as rubber is provided on the upper surface of the upper wall portion 108a of the upper horizontal portion 108 so as to extend in the left-right direction. At the normal time, the rear end portion 34 b of the tread surface constituting portion 34 is placed on the second cushioning material 120. The height (vertical length) of the second cushioning material 120 is determined so that the upper surface thereof and the upper surface of the first cushioning material 88 have the same height.
図６に示すように、上側水平部１０８における前壁部１０８ｃの前面には、左右方向に延びる線状の第２止水部材１２２が、複数のボルト１２４を用いて固定されている。図２に示すように、本実施形態では、第２止水部材１２２と第１止水部材６８が切れ目無く連続して形成されており、全体として、Ｕ字状の止水部材１２６が構成されている。 As shown in FIG. 6, a linear second water stop member 122 extending in the left-right direction is fixed to the front surface of the front wall portion 108 c in the upper horizontal portion 108 using a plurality of bolts 124. As shown in FIG. 2, in this embodiment, the 2nd water stop member 122 and the 1st water stop member 68 are formed continuously without a cut | interruption, and the U-shaped water stop member 126 is comprised as a whole. ing.
以下には、遮水装置１０の動作について説明する。図３に示すように、通常時には、遮水部材３６が貯水ピット３８に完全に収容されるとともに、踏み面構成部３４が第１緩衝材８８および第２緩衝材１２０に載置されている。これにより、階段１２の下から３段目（上から２段目）の段差部２４ｃの踏み面２６が構成されている。第１緩衝材８８および第２緩衝材１２０は、ゴム等の弾性材料で形成されているので、踏み面構成部３４の「がたつき」や「位置ずれ」は生じ難い。 Below, operation | movement of the water shielding apparatus 10 is demonstrated. As shown in FIG. 3, at the normal time, the water shielding member 36 is completely accommodated in the water storage pit 38, and the tread surface constituting portion 34 is placed on the first buffer material 88 and the second buffer material 120. Thereby, the tread 26 of the step part 24c of the third step from the bottom of the staircase 12 (the second step from the top) is configured. Since the first cushioning material 88 and the second cushioning material 120 are made of an elastic material such as rubber, “rattle” and “position shift” of the tread surface constituting portion 34 are unlikely to occur.
大雨、洪水および津波等が発生したとき、地表面Ｇ（図１）に溢れ出た水の水位が、下から２段目の段差部２４ｂの踏み面２６に到達すると、その水は、導水口８４から導水路１０２を通して貯水ピット３８に流入する。貯水ピット３８に流入した水の水位が上昇すると、その水の浮力で遮水部材３６が浮上し、踏み面構成部３４を持ち上げながら貯水ピット３８から上方に突出する。 When heavy rain, flooding, tsunami, or the like occurs, when the water level overflowing the ground surface G (FIG. 1) reaches the tread surface 26 of the second stepped portion 24b from the bottom, 84 flows into the water storage pit 38 through the water conduit 102. When the level of the water flowing into the water storage pit 38 rises, the water shielding member 36 is lifted by the buoyancy of the water and protrudes upward from the water storage pit 38 while lifting the tread surface component 34.
図７に示すように、遮水部材３６が最高位置に到達すると、突起部５０の傾斜面５０ａが押圧部７２の当接部７２ａに当接し、遮水部材３６が後方に向けて押圧される。これにより、遮水部材３６に設けられたスペーサー部材４８が支柱４０に設けられた凹部６６に収容され、遮水部材３６の後面３６ｂが第１止水部材６８および第２止水部材１２２に押し当てられる。この状態において、階段１２を下から上に流れようとする水Ｗの流れが遮断される。地表面に溢れた水Ｗが引くと、貯水ピット３８に貯留された水Ｗが排水管６２から外部に排出され、貯水ピット３８の内部の水位が徐々に低くなる。これに伴って、遮水部材３６が徐々に降下し、貯水ピット３８に完全に収容される。 As shown in FIG. 7, when the water-impervious member 36 reaches the highest position, the inclined surface 50a of the protrusion 50 comes into contact with the contact part 72a of the pressing part 72, and the water-impervious member 36 is pressed backward. . As a result, the spacer member 48 provided on the water-impervious member 36 is accommodated in the recess 66 provided on the support column 40, and the rear surface 36 b of the water-impervious member 36 is pushed against the first water-stop member 68 and the second water-stop member 122. Hit. In this state, the flow of water W that attempts to flow up the stairs 12 from below is blocked. When the water W overflowing on the ground surface is drawn, the water W stored in the water storage pit 38 is discharged to the outside from the drain pipe 62, and the water level inside the water storage pit 38 gradually decreases. Accordingly, the water shielding member 36 gradually descends and is completely accommodated in the water storage pit 38.
本実施形態によれば、上記構成により以下の各効果を奏することができる。すなわち、図３に示すように、踏み面構成部３４の鉛直下方に貯水ピット３８が設けられており、踏み面構成部３４よりも下方の蹴込み面２８に導水口８４が設けられているので、階段１２のスペースを有効活用して遮水装置１０を設置できる。また、導水口８４は、蹴込み面２８に設けられているので、導水口８４から雨水が浸入することを抑制できる。 According to the present embodiment, the following effects can be achieved by the above configuration. That is, as shown in FIG. 3, the water storage pit 38 is provided vertically below the tread surface constituting portion 34, and the water inlet 84 is provided on the kick surface 28 below the tread surface constituting portion 34. The water shielding device 10 can be installed by effectively utilizing the space of the stairs 12. Moreover, since the water inlet 84 is provided in the kick surface 28, it can suppress that rainwater permeates from the water inlet 84.
図３に示すように、導水口８４は、下から２段目以上の段差部２４ｃの蹴込み面２８に設けられているので、導水口８４を歩道等の地表面Ｇから上方に離して配置できる。したがって、地表面Ｇを流れる水が導水口８４に浸入することを防止できるとともに、地表面Ｇに存在するゴミ等が導水口８４に詰まることを防止できる。また、隣り合う２つの脚部８２の間に導水口８４が設けられているので、導水口８４の開口面積を広く確保できる。 As shown in FIG. 3, the water inlet 84 is provided on the kick surface 28 of the stepped portion 24 c that is the second or higher step from the bottom, so the water inlet 84 is disposed away from the ground surface G such as a sidewalk. it can. Accordingly, it is possible to prevent water flowing on the ground surface G from entering the water inlet 84 and to prevent clogging of the water inlet 84 with dust or the like existing on the ground surface G. Moreover, since the water inlet 84 is provided between the two adjacent leg parts 82, the opening area of the water inlet 84 can be ensured widely.
図５に示すように、導水口８４は、蹴込み面２８を構成する蹴込み板１００に形成された複数の貫通孔１００ａを有しているので、導水口８４からゴミ等が入り込むことを抑制できる。 As shown in FIG. 5, the water inlet 84 has a plurality of through-holes 100 a formed in the kick plate 100 that constitutes the kick surface 28, so that dust and the like are prevented from entering from the water inlet 84. it can.
図１に示すように、貯水ピット３８の一部は建造物１４の外壁部１８で構成されているので、貯水ピット３８の材料を節約でき、施工コストを低く抑えることができる。また、第２受け部１０４を貯水ピット３８の底部５８に固定できるので、外壁部１８の強度が不足する場合でも、第２受け部１０４を確実に支持できる。 As shown in FIG. 1, since a part of the water storage pit 38 is constituted by the outer wall portion 18 of the building 14, the material of the water storage pit 38 can be saved, and the construction cost can be kept low. Moreover, since the 2nd receiving part 104 can be fixed to the bottom part 58 of the water storage pit 38, even when the intensity | strength of the outer wall part 18 is insufficient, the 2nd receiving part 104 can be supported reliably.
なお、本発明の実施にあたっては、上記実施形態に限定されず、本発明の目的を逸脱しない限りにおいて種々の変更が可能である。図８は、他の実施形態に係る遮水装置１３０の構成を示す鉛直断面図である。上述の実施形態では、第２受け部１０４を貯水ピット３８の底部５８に固定しているが、図８に示す遮水装置１３０のように、第２受け部１３２を外壁部１８に固定してもよい。 In carrying out the present invention, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the object of the present invention. FIG. 8 is a vertical cross-sectional view illustrating a configuration of a water shielding device 130 according to another embodiment. In the above-described embodiment, the second receiving portion 104 is fixed to the bottom 58 of the water storage pit 38, but the second receiving portion 132 is fixed to the outer wall portion 18 as in the water shielding device 130 shown in FIG. Also good.
図８に示す遮水装置１３０は、踏み面構成部３４における水の流れの下流側の端部３４ｂを下方から受ける第２受け部１３２と、第２受け部１３２を外壁部１８に固定するための固定手段１３４とを備えている。第２受け部１３２は、上述の実施形態の第２受け部１０４（図６）と同様に、外壁部１８の表面１８ａに沿って水平方向に延びて設けられた上側水平部１３６および下側水平部１３８と、外壁部１８の表面１８ａに沿って鉛直方向に延びて設けられた複数の鉛直部１４０とを有している。下側水平部１３８（または鉛直部１４０）には、複数の貫通孔１４２が形成されている。固定手段１３４は、その一方端部が外壁部１８に埋め込まれて固定されたアンカーボルト１４４と、アンカーボルト１４４に螺合されるナット１４６とを有している。第２受け部１３２を外壁部１８に固定する際には、下側水平部１３８（または鉛直部１４０）の貫通孔１４２にアンカーボルト１４４が挿通され、このアンカーボルト１４４にナット１４６が螺合される。 The impermeable device 130 shown in FIG. 8 is for fixing the second receiving portion 132 that receives the downstream end 34 b of the water flow in the tread surface constituting portion 34 from the lower side and the second receiving portion 132 to the outer wall portion 18. The fixing means 134 is provided. Similarly to the second receiving portion 104 (FIG. 6) of the above-described embodiment, the second receiving portion 132 extends in the horizontal direction along the surface 18a of the outer wall portion 18 and is provided with an upper horizontal portion 136 and a lower horizontal portion. Part 138 and a plurality of vertical parts 140 provided to extend in the vertical direction along the surface 18 a of the outer wall part 18. A plurality of through holes 142 are formed in the lower horizontal portion 138 (or the vertical portion 140). The fixing means 134 has an anchor bolt 144 whose one end is embedded and fixed in the outer wall portion 18, and a nut 146 that is screwed into the anchor bolt 144. When the second receiving portion 132 is fixed to the outer wall portion 18, the anchor bolt 144 is inserted into the through hole 142 of the lower horizontal portion 138 (or the vertical portion 140), and the nut 146 is screwed into the anchor bolt 144. The
この構成によれば、第２受け部１３２を外壁部１８に固定できるので、第２受け部１３２を貯水ピット３８の底部５８にまで延ばして形成する必要がなく、第２受け部１３２の材料を節約して、施工コストを低く抑えることができる。 According to this configuration, since the second receiving portion 132 can be fixed to the outer wall portion 18, there is no need to form the second receiving portion 132 extending to the bottom 58 of the water storage pit 38, and the material of the second receiving portion 132 can be made. It can save and keep the construction cost low.
１０…遮水装置、１２…階段、１４…建造物、２４ａ〜２４ｄ…段差部、２６…踏み面、２８…蹴込み面、３４…踏み面構成部、３６…遮水部材、３８…貯水ピット、８４…導水口 DESCRIPTION OF SYMBOLS 10 ... Water shielding apparatus, 12 ... Stairs, 14 ... Building, 24a-24d ... Step part, 26 ... Tread surface, 28 ... Kick surface, 34 ... Tread surface component part, 36 ... Water shielding member, 38 ... Water storage pit , 84 ... Water inlet
Claims (6)
前記階段の踏み面を構成する踏み面構成部と、
前記踏み面構成部の鉛直下方に設けられた貯水ピットと、
前記踏み面構成部よりも下方の前記階段の蹴込み面に設けられ、前記貯水ピットに前記水を導入するための導水口と、
前記貯水ピットに収容され、前記貯水ピットに導入された前記水の浮力で浮上して、前記踏み面構成部を持ち上げながら前記貯水ピットから上方に突出する遮水部材とを備え、
前記導水口は、下から２段目以上の前記段差部の前記蹴込み面に設けられている、遮水装置。 A part of the staircase having a plurality of step portions, and a water shielding device that blocks a flow of water that flows from the bottom to the top of the staircase,
A tread surface constituting a tread surface of the stairs;
A water storage pit provided vertically below the tread component,
A water inlet for introducing the water into the water storage pit, provided on the kicking surface of the stairs below the tread surface component;
A water-impervious member that is housed in the water storage pit, floats with the buoyancy of the water introduced into the water storage pit, and protrudes upward from the water storage pit while lifting the tread surface component ,
The water guide port, that are provided in the riser face of the step portion of the two or more stages from the bottom, water blocking device.
前記階段の幅方向に間隔を隔てて設けられ、前記第１受け部を下方から支持する複数の脚部とを備え、
前記導水口は、隣り合う２つの前記脚部の間に設けられている、請求項１に記載の遮水装置。 A first receiving portion for receiving an upstream end of the water flow in the tread surface configuration portion from below;
A plurality of legs provided at intervals in the width direction of the stairs and supporting the first receiving part from below;
The water shielding device according to claim 1, wherein the water inlet is provided between two adjacent leg portions.
前記貯水ピットの一部は前記建造物の外壁部で構成されている、請求項１ないし３のいずれか１項に記載の遮水装置。 The plurality of stepped portions are formed so as to increase stepwise from the ground surface toward the opening of the building,
Said portion of the water storage pit is composed of an outer wall portion of the building, water blocking device according to any one of claims 1 to 3.
前記第２受け部を前記貯水ピットの底部に固定するための固定手段とを備える、請求項４に記載の遮水装置。 A second receiving portion for receiving the downstream end of the water flow in the tread surface configuration portion from below;
The water-impervious device according to claim 4 , further comprising fixing means for fixing the second receiving portion to the bottom of the water storage pit.
前記第２受け部を前記外壁部に固定するための固定手段とを備える、請求項４に記載の遮水装置。 A second receiving portion for receiving the downstream end of the water flow in the tread surface configuration portion from below;
The water shielding apparatus according to claim 4 , further comprising fixing means for fixing the second receiving part to the outer wall part.
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