JP2006144425A - Ditch structure - Google Patents

Ditch structure Download PDF

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Publication number
JP2006144425A
JP2006144425A JP2004337332A JP2004337332A JP2006144425A JP 2006144425 A JP2006144425 A JP 2006144425A JP 2004337332 A JP2004337332 A JP 2004337332A JP 2004337332 A JP2004337332 A JP 2004337332A JP 2006144425 A JP2006144425 A JP 2006144425A
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groove
ditch
bonded
waterproof joint
countersink
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JP2004337332A
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JP4446868B2 (en
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Tetsuo Matsumura
哲男 松村
Yasuyuki Sato
泰進 佐藤
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Architectural Yamade Corp
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Architectural Yamade Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a ditch structure hardly causing a puddle in the ditch. <P>SOLUTION: In this ditch structure, a plurality of ditch members 3 having ditch parts 3a allowing water to flow down are arranged in the mutually facing state of the edge parts along the longitudinal direction of the ditch, and a waterproof patch band member 4 is bonded to the end parts of both facing ditch members 3 in a state of extending over the mutual ditch inner surfaces. At least a part corresponding to a ditch bottom part, out of a bonded part 3c of the ditch member 3 to which the waterproof patch band member 4 is bonded, is formed as a counterbore part 5 with the surface lowered from the other part. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、水を流下自在な溝部を備えた溝部材の複数を、溝長手方向に沿って端縁部どうしが対向する状態に配置し、対向する前記両溝部材の端部に、相互の溝内周面にわたる状態に防水継ぎ当て帯材が接着してある溝構造に関する。   According to the present invention, a plurality of groove members each having a groove portion through which water can freely flow are arranged in a state in which the end edge portions face each other along the groove longitudinal direction, and the end portions of the both groove members facing each other The present invention relates to a groove structure in which a waterproof joint strip is bonded to a state extending over the inner peripheral surface of the groove.

従来、この種の溝を形成するには、図５に示すように、長手方向に同一断面形状の溝部材２０（例えば、押出成形等によって形成されたもの）が用いられ、予め、下地躯体１上に並設された溝支持用の長尺体からなる溝支持下地２に対して、溝部材２０の両側縁に形成されたフランジ部２０ｂが載置される状態に各溝部材２０を配置し、長手方向に隣接する両溝部材２０どうしの突き合わせ端部にわたって防水継ぎ当て帯材４を接着することで実施されている。
そして、従来の溝構造としては、接着された前記防水継ぎ当て帯材４は、前記突き合わせ端部でその厚み分が溝内周面側に盛り上がった状態に設置されている。尚、この様な従来技術に関しては、当業者の間で広く知られているものであるが、溝構造に関して詳しく言及した特許文献などは見あたらないので、先行技術文献は示していない。 Conventionally, in order to form this type of groove, as shown in FIG. 5, a groove member 20 having the same cross-sectional shape in the longitudinal direction (for example, formed by extrusion molding or the like) is used. Each groove member 20 is arranged in a state in which the flange portions 20b formed on both side edges of the groove member 20 are placed on the groove support base 2 made of a long member for supporting the groove arranged side by side. This is implemented by adhering the waterproof joint strip 4 across the butted ends of both groove members 20 adjacent in the longitudinal direction.
And as a conventional groove structure, the said waterproof joint band material 4 adhere | attached is installed in the state which the part for the thickness rose to the groove | channel inner peripheral surface side in the said butt | matching edge part. Such a prior art is widely known among those skilled in the art, but since there is no patent document or the like that specifically refers to the groove structure, no prior art document is shown.

上述した従来の溝構造によれば、図５に示すように、長手方向に同一断面形状の溝部材２０どうしの突き合わせ端部上面にわたって、前記防水継ぎ当て帯材４を接着してあるから、その溝継ぎ部分においては、前記防水継ぎ当て帯材４が、前記溝部材２０の表面に積み重なった状態となり、その部分に段差ができる。
従って、溝の高い方から低い方へ水を流すと言う『溝』本来の機能を、前記溝継ぎ部分に位置する前記防水継ぎ当て帯材４が損なう危険性がある。即ち、図６に示すように、水の流れ道となる当該溝内で、前記防水継ぎ当て帯材４が堰となり、溝底部の溝部材２０表面上に水溜まりが出来やすい構造となっていた。
その結果、溜まり水によって溝部材表面の腐蝕が進行しやすかったり、溝部材表面に汚れが付着しやすかったりすると言う問題点があった。 According to the above-described conventional groove structure, as shown in FIG. 5, the waterproof joint strip 4 is bonded across the upper surfaces of the butted ends of the groove members 20 having the same cross-sectional shape in the longitudinal direction. In the groove joint portion, the waterproof joint strip 4 is stacked on the surface of the groove member 20, and a step is formed in that portion.
Accordingly, there is a risk that the waterproof joint strip 4 located at the groove joint portion may lose the original function of “groove” which flows water from the higher to the lower groove. That is, as shown in FIG. 6, the waterproof joint strip 4 becomes a weir in the groove serving as a water flow path, and the water pool is easily formed on the surface of the groove member 20 at the bottom of the groove.
As a result, there has been a problem that the surface of the groove member is likely to be corroded by the accumulated water, and dirt is likely to adhere to the surface of the groove member.

従って、本発明の目的は、上記問題点を解消し、溝内に水溜まりが生じ難い溝構造を提供するところにある。   Accordingly, an object of the present invention is to provide a groove structure that solves the above-described problems and hardly causes a water pool in the groove.

本発明の第１の特徴構成は、水を流下自在な溝部を備えた溝部材の複数を、溝長手方向に沿って端縁部どうしが対向する状態に配置し、対向する前記両溝部材の端部に、相互の溝内周面にわたる状態に防水継ぎ当て帯材が接着してある溝構造において、前記防水継ぎ当て帯材が接着されている前記溝部材の被接着部の内、少なくとも溝底部に相当する箇所は、表面を他の部分より低くした座繰り部として形成してあるところにある。   In the first characteristic configuration of the present invention, a plurality of groove members having groove portions through which water can freely flow are arranged in a state in which the edge portions face each other along the groove longitudinal direction, and the two groove members facing each other are arranged. In the groove structure in which the waterproof joint band material is bonded to the end portion so as to cover the inner peripheral surfaces of the grooves, at least the groove of the bonded portion of the groove member to which the waterproof joint band material is bonded The portion corresponding to the bottom is formed as a countersink having a lower surface than other portions.

本発明の第１の特徴構成によれば、前記防水継ぎ当て帯材が接着されている前記溝部材の被接着部の内、少なくとも溝底部に相当する箇所は、表面を他の部分より低くした座繰り部として形成してあるから、その座繰り部上に接着された前記防水継ぎ当て帯材の表面は、従来に比べて低くなり、溝部材の他の溝底部上面と段差ができ難くなる。
従って、段差が出来なくなれば、溝勾配に沿って水は流下でき、溝内に水溜まりが生じ難くなる。
その結果、水溜まりによる溝部材表面の腐蝕を抑制することができると共に、汚れも付着し難くでき、溝部材の耐久性低下を防止することが可能となる。 According to the first characteristic configuration of the present invention, at least a portion corresponding to the groove bottom portion of the bonded portion of the groove member to which the waterproof joint strip is bonded has a lower surface than other portions. Since it is formed as a countersink part, the surface of the waterproof joint band material bonded on the countersink part is lower than the conventional one, and it is difficult to make a step with the other upper surface of the groove bottom part of the groove member. .
Therefore, if the step becomes impossible, water can flow along the groove gradient, and it becomes difficult for a water pool to be formed in the groove.
As a result, it is possible to suppress the corrosion of the groove member surface due to the water pool, and it is also possible to prevent dirt from adhering, and to prevent the durability of the groove member from being lowered.

本発明の第２の特徴構成は、前記座繰り部の座繰り深さ寸法と、前記防水継ぎ当て帯材の厚み寸法とは同じ、又は、ほぼ同じに形成してあるところにある。   The second characteristic configuration of the present invention is that the countersink depth dimension of the countersink portion and the thickness dimension of the waterproof joint strip are formed to be the same or substantially the same.

本発明の第２の特徴構成によれば、本発明の第１の特徴構成による上述の作用効果を叶えることができるのに加えて、座繰り部上に接着した防水継ぎ当て帯材の表面が、溝部材の他の溝底部上面と面一になり、溝勾配に沿ってスムースに水を流下させることができる。従って、水溜まりによる溝部材表面の腐蝕や、汚れの付着を、より確実に防止することができる。   According to the second characteristic configuration of the present invention, in addition to being able to achieve the above-described operation and effect according to the first characteristic configuration of the present invention, the surface of the waterproof joint strip adhered on the countersink portion is provided. The groove member is flush with the upper surface of the other groove bottom portion, so that water can flow smoothly along the groove gradient. Therefore, corrosion of the groove member surface and adhesion of dirt due to water pools can be prevented more reliably.

本発明の第３の特徴構成は、溝幅方向に間隔をあけて並設された一対の溝設置下地上にそれぞれ載置自在なフランジ部が、前記溝部材の溝開口の両縁部に張り出し状態にそれぞれ設けてあり、前記座繰り部は、前記被接着部の内、前記フランジ部を除く部分に形成してあるところにある。   According to a third characteristic configuration of the present invention, flange portions that can be respectively placed on a pair of groove installation bases arranged in parallel with a gap in the groove width direction project over both edges of the groove opening of the groove member. It is provided in each state, and the countersunk portion is formed in a portion of the adherend portion excluding the flange portion.

本発明の第３の特徴構成によれば、本発明の第１又は２の特徴構成による上述の作用効果を叶えることができるのに加えて、例えば、溝部材を厚みの同じ薄板で構成するような場合でも、特別な補強を設けなくても安定した設置状態を維持することが可能となる。
つまり、溝部材を厚みの同じ薄板で構成する場合、両端部の座繰り部は、裏面側では座繰り深さに相当する膨らみが生じるため、前記フランジ部まで座繰り部を形成してあると、溝設置下地上に溝部材のフランジ部を載置した状態では、座繰り部を形成した両端部のみが接地して、中間部は溝設置下地上に浮いた状態となり、極めて不安定な設置状態になり易い。更には、このような支持状態で溝部材上に荷重が作用すると、中間部が下方へ変形する危険性があり、溝部材の耐久性低下の原因になり易い問題点がある。
しかしながら、本発明のように、座繰り部を、前記被接着部の内、前記フランジ部を除く部分に形成してあれば、フランジ部の下面は、前記溝設置下地の上面に沿った扁平面として構成することができ、フランジ部の広い範囲で溝設置下地に荷重伝達することが可能となり、より安定した設置状態を維持することが可能となる。 According to the third characteristic configuration of the present invention, in addition to being able to achieve the above-described operational effects according to the first or second characteristic configuration of the present invention, for example, the groove member is configured by a thin plate having the same thickness. Even in such a case, it is possible to maintain a stable installation state without providing special reinforcement.
In other words, when the groove member is composed of a thin plate having the same thickness, the countersink portions at both ends have a bulge corresponding to the countersink depth on the back side, and therefore the countersink portions are formed up to the flange portion. When the flange part of the groove member is placed on the groove installation base, only the both ends where the countersink part is formed are grounded, and the intermediate part is floated on the groove installation base. It tends to be in a state. Furthermore, when a load acts on the groove member in such a support state, there is a risk that the intermediate portion may be deformed downward, which may cause a decrease in durability of the groove member.
However, as in the present invention, if the countersunk portion is formed in a portion excluding the flange portion in the bonded portion, the lower surface of the flange portion is a flat surface along the upper surface of the groove installation base. The load can be transmitted to the groove installation base in a wide range of the flange portion, and a more stable installation state can be maintained.

本発明の第４の特徴構成は、前記溝底部には、下方に凹んだ谷部が溝長手方向に沿って設けられているところにある。   The 4th characteristic structure of this invention exists in the place where the trough part dented below is provided in the said groove bottom part along the groove | channel longitudinal direction.

本発明の第４の特徴構成によれば、本発明の第１〜３の何れかの特徴構成による上述の作用効果を叶えることができるのに加えて、溝部材の底部分にある水を、前記谷部に誘導して、速やかに流下させることが可能となる。
更には、谷部を形成することで、溝部材の断面二次モーメントを増加させることができ、溝部材そのものの補強効果をも期待することができる。 According to the 4th characteristic structure of this invention, in addition to being able to achieve the above-mentioned effect by any 1st-3rd characteristic structure of this invention, the water in the bottom part of a groove member, It is possible to guide the trough to flow down quickly.
Furthermore, by forming the trough, the cross-sectional secondary moment of the groove member can be increased, and the reinforcing effect of the groove member itself can be expected.

以下に本発明の実施の形態を図面に基づいて説明する。尚、図面において従来例と同一の符号で表示した部分は、同一又は相当の部分を示している。   Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the parts indicated by the same reference numerals as those in the conventional example indicate the same or corresponding parts.

図１、図２は、本発明の溝構造の一実施形態を示すもので、下地躯体１上に、溝幅方向に間隔をあけて一対の溝設置下地２が並設してあり、この溝設置下地２上に、溝部材３の複数が、溝長手方向に沿って端縁部どうしが対向する状態に配置され、対向する前記両溝部材３の端部に、相互の溝内周面にわたる状態に防水継ぎ当て帯材４が接着されて溝が構成されている。   1 and 2 show an embodiment of the groove structure of the present invention. A pair of groove installation bases 2 are arranged in parallel on the base casing 1 at intervals in the groove width direction. A plurality of groove members 3 are arranged on the installation base 2 in a state where the edge portions are opposed to each other along the groove longitudinal direction, and the inner peripheral surfaces of the grooves are disposed at the ends of the opposed groove members 3. The waterproof joint strip 4 is adhered to the state to form a groove.

前記溝設置下地２は、矩形断面の長尺体で、例えば、コンクリートや木材や金属角パイプ等で構成することができ、前記下地躯体１上に、敷設してある。尚、溝設置下地２は、下地躯体１と共に一体成形してあってもよい。   The groove installation base 2 is an elongated body having a rectangular cross section, and can be formed of, for example, concrete, wood, a metal square pipe, or the like, and is laid on the base casing 1. The groove installation base 2 may be integrally formed with the base casing 1.

前記溝部材３は、水を流下自在な溝部３ａと、その溝部３ａの溝開口側両縁部に張り出し状態にそれぞれ設けられたフランジ部３ｂとを備えて構成してあり、前記フランジ部３ｂが、前記溝設置下地２上に載置状態に設置される。
材質は、塩ビ被覆を施した金属板で、両端部には、前記防水継ぎ当て帯材４が接着される被接着部３ｃが全幅にわたって設けられている。接着は、例えば、接着剤を使用したり、熱融着等の手法によって実施することができる。
また、前記被接着部３ｃの内、溝底部に相当する箇所は、前記防水継ぎ当て帯材４の厚み寸法４ａと同じ座繰り深さ寸法の座繰り部５が形成してある。この座繰り部５の形成は、例えば、プレス加工等によって実施することができる。
尚、当該実施形態における溝部材３は、被接着部３ｃの内、溝底部以外の部分、即ち、溝側壁部やフランジ部３ｂにおいては、前記座繰り部５は形成されておらず、被接着部３ｃ以外の部分と面一に仕上げられている。
従って、溝部材３を溝設置下地２上に配置すると、前記フランジ部３ｂは、全長にわたって溝設置下地２の上面に接当し、極めて安定した状態に設置させることができる。 The groove member 3 includes a groove portion 3a through which water can freely flow down, and flange portions 3b provided in an overhanging state on both edges of the groove opening side of the groove portion 3a. The flange portion 3b And placed on the groove installation base 2 in a mounted state.
The material is a metal plate coated with polyvinyl chloride, and at both ends, a bonded portion 3c to which the waterproof joint strip 4 is bonded is provided over the entire width. Adhesion can be performed, for example, using an adhesive or a technique such as heat fusion.
Further, in the portion corresponding to the groove bottom portion in the adherend portion 3c, a countersink portion 5 having the same countersink depth as the thickness dimension 4a of the waterproof joint strip 4 is formed. Formation of this counterbore part 5 can be implemented by press work etc., for example.
In the groove member 3 in this embodiment, the countersink portion 5 is not formed in a portion other than the groove bottom portion of the bonded portion 3c, that is, in the groove side wall portion or the flange portion 3b. It is finished flush with the parts other than the part 3c.
Therefore, when the groove member 3 is disposed on the groove installation base 2, the flange portion 3b can be in contact with the upper surface of the groove installation base 2 over the entire length and can be installed in an extremely stable state.

前記防水継ぎ当て帯材４は、隣接する両溝部材３の被接着部３ｃにわたって接着されることで、溝部材３どうしの連結、及び、継ぎ目の防水を図ることができる。材質は、当該実施形態においては、塩化ビニル製の帯状シートで構成してあり、上述の通り、両溝部材３を突き合わせた状態で、互いの被接着部３ｃにわたって接着や、熱融着の手法で一体的に設けることができる。   The waterproof joint band 4 is bonded over the bonded portions 3c of the adjacent groove members 3 so that the groove members 3 can be connected to each other and the seam can be waterproofed. In the present embodiment, the material is composed of a belt-like sheet made of vinyl chloride, and as described above, in a state where both groove members 3 are abutted, a method of bonding or heat-sealing over the bonded portions 3c. Can be provided integrally.

本実施形態の溝構造によれば、溝部材３の溝底部に、前記防水継ぎ当て帯材４が納まる座繰り部５を設けてあることで、継ぎ目でも溝底部の内周面が面一状態となり、水をスムースに流下させることが可能となる。その結果、溝内に、溜まり水が残り難くなり、腐蝕したり汚れが付く等の現象を緩和することが可能となり、耐久性の高い溝を形成することができるようになる。   According to the groove structure of the present embodiment, the groove bottom portion of the groove member 3 is provided with the countersink portion 5 in which the waterproof joint band material 4 is accommodated, so that the inner peripheral surface of the groove bottom portion is flush with the seam. Thus, the water can flow smoothly. As a result, it becomes difficult for the accumulated water to remain in the groove, and it becomes possible to alleviate phenomena such as corrosion and dirt, and a highly durable groove can be formed.

〔別実施形態〕
以下に他の実施の形態を説明する。 [Another embodiment]
Other embodiments will be described below.

〈１〉 前記溝部材３は、先の実施形態で説明した被接着部３ｃの内の溝底部にのみ座繰り部５を形成したものに限るものではなく、例えば、被接着部３ｃの全域（図３（イ）参照）、又は、被接着部３ｃの溝側壁部と溝底部（図３（ロ）参照）に形成してあってもよい。
要するに、少なくとも、被接着部３ｃの内、溝底部に設けてあればよい。
〈２〉 また、溝部材３は、先の実施形態で説明したように溝底部が平坦である断面形状に限るものではなく、例えば、図４に示すように、前記溝底部に、下方に凹んだ谷部６が溝長手方向に沿って設けられていてもよい。この場合は、溝を流れる水が、前記谷部６に集まって流下し易く、溝内に水がより残り難くなる。
この谷部６は、図に示すように、さまざまな断面形状とすることが可能である。 <1> The groove member 3 is not limited to one in which the countersunk portion 5 is formed only at the groove bottom portion of the bonded portion 3c described in the previous embodiment. 3 (a)), or the groove side wall and the groove bottom (see FIG. 3 (b)) of the bonded portion 3c.
In short, it suffices to provide at least the groove bottom portion of the adherend portion 3c.
<2> The groove member 3 is not limited to a cross-sectional shape in which the groove bottom is flat as described in the previous embodiment. For example, as shown in FIG. 4, the groove member 3 is recessed downward in the groove bottom. The valley portion 6 may be provided along the groove longitudinal direction. In this case, the water flowing through the groove is likely to collect in the valley 6 and flow down, and the water is less likely to remain in the groove.
As shown in the figure, the valley 6 can have various cross-sectional shapes.

尚、上述のように、図面との対照を便利にするために符号を記したが、該記入により本発明は添付図面の構成に限定されるものではない。また、本発明の要旨を逸脱しない範囲において、種々なる態様で実施し得ることは勿論である。   In addition, as mentioned above, although the code | symbol was written in order to make contrast with drawing convenient, this invention is not limited to the structure of an accompanying drawing by this entry. In addition, it goes without saying that the present invention can be carried out in various modes without departing from the gist of the present invention.

溝構造を示す一部切欠き斜視図Partially cutaway perspective view showing groove structure 溝の側面視断面図Side view of groove 別実施形態の溝部材の要部を示す斜視図The perspective view which shows the principal part of the groove member of another embodiment. 別実施形態の溝部材の設置状況を示す横断面図Cross-sectional view showing the installation status of the groove member of another embodiment 従来の溝構造を示す一部切欠き斜視図Partially cutaway perspective view showing a conventional groove structure 従来の溝の側面視断面図Side view sectional view of a conventional groove

符号の説明Explanation of symbols

２ 溝設置下地
３ 溝部材
３ａ 溝部
３ｂ フランジ部
３ｃ 被接着部
４ 防水継ぎ当て帯材
４ａ 厚み寸法
５ 座繰り部
６ 谷部 2 Groove installation base 3 Groove member 3a Groove 3b Flange 3c Adhered part 4 Waterproof joint band 4a Thickness 5 Countersink 6 Valley

Claims (4)

水を流下自在な溝部を備えた溝部材の複数を、溝長手方向に沿って端縁部どうしが対向する状態に配置し、対向する前記両溝部材の端部に、相互の溝内周面にわたる状態に防水継ぎ当て帯材が接着してある溝構造であって、
前記防水継ぎ当て帯材が接着されている前記溝部材の被接着部の内、少なくとも溝底部に相当する箇所は、表面を他の部分より低くした座繰り部として形成してある溝構造。 A plurality of groove members having grooves that allow water to flow freely are arranged in a state in which the edge portions face each other along the groove longitudinal direction, and the inner circumferential surfaces of the grooves are arranged at the ends of the both groove members facing each other. It is a groove structure with waterproof joint strips bonded to
A groove structure in which at least a portion corresponding to the groove bottom portion of the groove member to which the waterproof joint band material is bonded is formed as a countersink portion whose surface is lower than other portions. 前記座繰り部の座繰り深さ寸法と、前記防水継ぎ当て帯材の厚み寸法とは同じ、又は、ほぼ同じに形成してある請求項１に記載の溝構造。   The groove structure according to claim 1, wherein a countersink depth dimension of the countersink portion and a thickness dimension of the waterproof joint strip are formed to be the same or substantially the same. 溝幅方向に間隔をあけて並設された一対の溝設置下地上にそれぞれ載置自在なフランジ部が、前記溝部材の溝開口の両縁部に張り出し状態にそれぞれ設けてあり、前記座繰り部は、前記被接着部の内、前記フランジ部を除く部分に形成してある請求項１又は２の何れか一項に記載の溝構造。   Flange portions that can be placed on a pair of groove installation bases arranged side by side in the groove width direction are provided on both edges of the groove opening of the groove member in a protruding state, respectively. 3. The groove structure according to claim 1, wherein the portion is formed in a portion of the adherend portion excluding the flange portion. 前記溝底部には、下方に凹んだ谷部が溝長手方向に沿って設けられている請求項１〜３の何れか一項に記載の溝構造。   The groove structure as described in any one of Claims 1-3 in which the trough part dented below is provided in the said groove bottom part along the groove longitudinal direction.
JP2004337332A 2004-11-22 2004-11-22 Groove structure Expired - Fee Related JP4446868B2 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012090596A1 (en) * 2010-12-27 2012-07-05 株式会社イトーヨーギョー Gutter block, drainage installation using same, and method for burying cables underground
JP2014214560A (en) * 2013-04-26 2014-11-17 住ベシート防水株式会社 Joining body and member
JP2014214561A (en) * 2013-04-26 2014-11-17 住ベシート防水株式会社 Drain ditch structure, roof floor, and veranda
JP2018048465A (en) * 2016-09-21 2018-03-29 株式会社レオパレス２１ Drainage device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012090596A1 (en) * 2010-12-27 2012-07-05 株式会社イトーヨーギョー Gutter block, drainage installation using same, and method for burying cables underground
JP2012136887A (en) * 2010-12-27 2012-07-19 Ito Yogyo Co Ltd Gutter block and drainage facility using the same as well as method for burying cables
JP2014214560A (en) * 2013-04-26 2014-11-17 住ベシート防水株式会社 Joining body and member
JP2014214561A (en) * 2013-04-26 2014-11-17 住ベシート防水株式会社 Drain ditch structure, roof floor, and veranda
JP2018048465A (en) * 2016-09-21 2018-03-29 株式会社レオパレス２１ Drainage device

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