JP2006077506A

JP2006077506A - Waterproof structure

Info

Publication number: JP2006077506A
Application number: JP2004264088A
Authority: JP
Inventors: Shu Inoue; 周井上; Ryoichi Yamabe; 亮一山部; Yasuharu Katsuma; 康晴勝間
Original assignee: Architectural Yamade Corp
Current assignee: Architectural Yamade Corp
Priority date: 2004-09-10
Filing date: 2004-09-10
Publication date: 2006-03-23

Abstract

<P>PROBLEM TO BE SOLVED: To provide a waterproof structure capable of resisting strong wind while minimizing installation labor and cost. <P>SOLUTION: In this waterproof structure, a plurality of bedding plates 2 are orderly arranged on the backing 1 of a roof, a waterproof sheet 3 is disposed on the bedding plates 2 in the state of covering them, and the waterproof sheet 3 is fixed at distributedly disposed waterproof sheet fixing parts P. An extensible sealing tape M capable of preventing wind from passing through clearances at abutted parts T between the plurality of bedding plates 2 in the bedding plate thickness direction is adhered to the abutted parts T in the state of being positioned across both bedding plates 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、屋根下地（例えば、折板屋根やデッキプレートや梁部材等）上に複数の下地板（例えば、多孔質板や木毛セメント板やＡＬＣ板や木材板等）が並べて設置され、それら下地板上を覆う状態に防水シートが配置され、分散配置された防水シート固定部で前記防水シートが固定してある防水構造に関する。 In the present invention, a plurality of base plates (for example, a porous plate, a wood cement plate, an ALC plate, a wood plate, etc.) are arranged side by side on a roof base (for example, a folded plate roof, a deck plate, a beam member, etc.) The present invention relates to a waterproof structure in which a waterproof sheet is disposed in a state of covering the base plate, and the waterproof sheet is fixed by distributed waterproof sheet fixing portions.

この種の防水構造は、例えば、野地板からなる前記下地板の上に、防水シートを沿わせて設置するものであったり、また、断熱板からなる前記下地板の上に、防水シートを沿わせて設置するものであったり、さまざまな屋根に採用されている。
また、前記下地板が断熱板である場合には、既設の折板屋根やデッキプレートで形成された屋根に、後から断熱板を敷設して断熱屋根に改築する場合や、新築時から屋根下地となる折板やデッキプレートや梁部材や野地板の上に断熱板を敷設して断熱屋根を構築する場合等、さまざまな形態での断熱屋根が対象となる。
そして、下地板の上に敷設される防水シートの固定は、例えば、円板形状や帯板形状の固定金具（防水シート固定部に相当）を下地板の上に配置して貫通ボルト等で屋根下地に固定しておき、その固定金具上に防水シートを接着することで実施されている。
また、この固定金具の配置に関しては、隣接する接着部同士は一定の間隔となるように前記屋根下地全域にわたって点在配置してあるのが一般的であった（例えば、特許文献１参照）。
一方、下地板に関しては、隣接させる別の下地板との突き合わせ部は、板厚み方向に沿って真っ直ぐな平坦面として成形（又は切断）されているのが一般的であった。
また、断熱屋根においては、屋根の断熱性能の向上を図るために、下地板同士の突き合わせ部を「合いじゃくり」とするものもあった（例えば、特許文献２参照）。 This type of waterproof structure is, for example, a structure in which a waterproof sheet is placed on the base plate made of a base plate, or a waterproof sheet is placed on the base plate made of a heat insulating plate. It can be installed in a variety of ways and has been used on various roofs.
In addition, when the base plate is a heat insulating plate, it is necessary to lay a heat insulating plate later on the roof formed of an existing folded plate roof or deck plate and reconstruct it into a heat insulating roof, or from the time of new construction Insulating roofs in various forms, such as when a heat insulating plate is constructed by laying a heat insulating plate on folded plates, deck plates, beam members, and field plates, are targeted.
And fixing the waterproof sheet laid on the base plate is, for example, a disk-shaped or strip-shaped fixing bracket (corresponding to the waterproof sheet fixing portion) is placed on the base plate and roofed with a through bolt or the like It is carried out by fixing it to the base and adhering a waterproof sheet on the fixing bracket.
In addition, regarding the arrangement of the fixing metal fittings, it has been common that the adhering portions adjacent to each other are scattered over the entire roof base so as to have a constant interval (see, for example, Patent Document 1).
On the other hand, with regard to the base plate, the abutting portion with another base plate adjacent to the base plate is generally formed (or cut) as a straight flat surface along the plate thickness direction.
In addition, in some heat insulating roofs, there is one in which the abutting portion between the base plates is “matched” in order to improve the heat insulating performance of the roof (see, for example, Patent Document 2).

特許第２７２４０４０号公報（図１〜３）Japanese Patent No. 2724040 (FIGS. 1 to 3) 特開２００２−６１３３９号公報（図６）JP 2002-61339 A (FIG. 6)

屋根面に風圧が作用すると、局部的に負圧が生じることがあり、その力は屋根下地上に設置してある防水シートを吸い上げるようにはたらく。そして、防水シートは、上述のように屋根下地に対して点在配置された固定金具で局部的に接着されているから、接着されていない部分に関しては屋根面上で上下に多少の移動が許容されている。
従って、屋根面に風が吹くに伴って、防水シートは、非接着部が上下に「バタバタ」と移動し、その動きは、あたかも水面の波のごとく、風上から風下に向かって流れていく。このような波立ちは、風と共に風下側へ伝播していく課程で防水シートの共振も作用してエネルギーが蓄積され、更に増幅される傾向がある。また、この傾向は、風が強いほど顕著に現れるのは当然であるが、防水シート裏面側の空間の密閉度が低いほど顕著に現れる。即ち、風によって防水シートが吸い上げられる際に、防水シート裏面側の空間の密閉度が高ければ、その空間が、防水シート表面側より低い圧力となって防水シートの上昇を抑制できるのに対して、前記空間の密閉度が低いと、防水シートの吸い上げに伴って容易に空気が流入するから、防水シート表裏での空間圧力差による抵抗が期待できにくく、防水シートの波立ち抑制効果が低くなる（図５参照）。そして、防水シート３の波立ちが続くに伴って、防水シートにおける固定部Ｐの周囲部分に、亀裂が入ったり裂けたりする現象が生じることが観測されている。
上述した従来の防水構造によれば、激しい温度差に曝される屋根面環境下においては、下地板２の熱膨張・収縮の繰り返しによって突き合わせ部Ｔに隙間が出来やすく、この隙間を通して屋根下地１側の空間と防水シート３裏面側空間とが連通すれば、上述のように風による防水シート３の波立ちを抑制し難くなる。そして、その波立ちを緩和するためには、各接着部間隔（固定スパン）を狭くして、波の振幅を小さくするしか打つ手が無く、その結果、接着箇所が多くなって、施工手間がかかると共に材料コストが高くつき易い問題点があった。 When wind pressure acts on the roof surface, local negative pressure may be generated, and the force acts to suck up the waterproof sheet installed on the roof base. And since the waterproof sheet is locally bonded by the fixing brackets scattered on the roof base as described above, some movement up and down is allowed on the roof surface with respect to the unbonded portion. Has been.
Therefore, as the wind blows on the roof surface, the non-adhesive part of the waterproof sheet moves up and down as “butterfly”, and the movement flows from the windward to the windward as if it were a wave on the water surface. . Such a wave tends to be further amplified by the resonance of the waterproof sheet in the process of propagating with the wind to the leeward side. In addition, it is natural that this tendency becomes more prominent as the wind is stronger, but it becomes more prominent as the degree of sealing of the space on the back side of the waterproof sheet is lower. That is, when the waterproof sheet is sucked up by the wind, if the sealing degree of the space on the back surface side of the waterproof sheet is high, the space becomes lower pressure than the surface side of the waterproof sheet and the rise of the waterproof sheet can be suppressed. If the sealing degree of the space is low, air easily flows in with the suction of the waterproof sheet, so resistance due to the space pressure difference between the front and back of the waterproof sheet is difficult to expect, and the ripple suppression effect of the waterproof sheet is reduced ( (See FIG. 5). As the waterproof sheet 3 continues to swell, it has been observed that a phenomenon occurs in which a portion of the waterproof sheet surrounding the fixed portion P is cracked or torn.
According to the conventional waterproof structure described above, in a roof surface environment exposed to a severe temperature difference, a gap is easily formed in the abutting portion T by repeated thermal expansion and contraction of the base plate 2, and the roof base 1 is passed through this gap. If the space on the side and the space on the back side of the waterproof sheet 3 communicate with each other, it is difficult to suppress the ripples of the waterproof sheet 3 due to wind as described above. And in order to alleviate the undulations, there is no choice but to narrow the distance between each bonded portion (fixed span) to reduce the amplitude of the wave, resulting in an increase in the number of places to be bonded and a lot of work. There was a problem that the material cost was high.

従って、本発明の目的は、上記問題点を解消し、施工手間やコストをできるだけ抑えながら、強風に強い防水構造を提供するところにある。 Accordingly, an object of the present invention is to provide a waterproof structure that is resistant to strong winds while eliminating the above problems and minimizing construction labor and costs.

本発明の第１の特徴構成は、屋根下地上に複数の下地板が並べて設置され、それら下地板上を覆う状態に防水シートが配置され、分散配置された防水シート固定部で前記防水シートが固定してある防水構造において、前記複数の下地板どうしの突き合わせ部における下地板厚み方向への風抜けを防止自在で、且つ、伸縮自在な目張りテープが、前記突き合わせ部で両下地板にわたる状態に接着してあるところにある。 A first characteristic configuration of the present invention is that a plurality of base plates are installed side by side on a roof base, a waterproof sheet is disposed in a state of covering the base plates, and the waterproof sheet is disposed in a dispersedly disposed waterproof sheet fixing portion. In the waterproof structure that is fixed, it is possible to prevent the airflow in the thickness direction of the base plate at the abutting portion of the plurality of base plates, and the stretchable weather tape extends over both base plates at the abutting portion. It is where it is glued.

本発明の第１の特徴構成によれば、前記複数の下地板どうしの突き合わせ部における下地板厚み方向への風抜けを防止自在で、且つ、伸縮自在な目張りテープが、前記突き合わせ部で両下地板にわたる状態に接着してあるから、前記目張りテープによって各下地板どうしの突き合わせ部の密閉を図ることができ、下地板厚み方向への風抜けを防止することができる。
しかも、目張りテープが伸縮性を備えているから、仮に下地板の熱膨張・収縮の繰り返しによって突き合わせ部に目開きが生じようとしても、その動きに追従でき、突き合わせ部の密閉状態を維持することが可能となる。
従って、下地板の突き合わせ部の密閉をより確実に図ることができるようになり、例えば、防水シートが、風の負圧で吸い上げられるような力を受けても、防水シートと下地板との間の空間が減圧されることで防水シートの上昇を抑制し易くなる。その結果、必要以上に短い間隔で防水シート固定部を設けなくても防水シートの波立ち防止を図ることができ、施工手間やコストを掛けずに強風に強い防水構造とすることが可能となる。 According to the first characteristic configuration of the present invention, it is possible to prevent the airflow in the thickness direction of the base plate at the abutting portions of the plurality of base plates, and the elastic tape can be stretched under the abutting portions. Since it adheres to the state over the base plate, the butt portion between the base plates can be hermetically sealed by the weather tape, and air blowout in the base plate thickness direction can be prevented.
Moreover, since the weather strip has elasticity, it can follow the movement even if the opening of the butt is caused by repeated thermal expansion and contraction of the base plate, and the sealing of the butt is maintained. Is possible.
Accordingly, the butted portion of the base plate can be sealed more reliably. For example, even when the waterproof sheet receives a force that is sucked up by the negative pressure of the wind, It becomes easy to suppress the rise of the waterproof sheet by depressurizing the space. As a result, it is possible to prevent the waterproof sheet from wobbling without providing the waterproof sheet fixing portion at an interval shorter than necessary, and it is possible to provide a waterproof structure that is strong against strong winds without requiring labor and cost.

本発明の第２の特徴構成は、前記目張りテープは、下地板どうしの少なくとも裏面側に接着してあるところにある。 A second characteristic configuration of the present invention is that the weather tape is bonded to at least the back side of the base plates.

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、下地板の突き合わせ部に対する下方から上方への風抜けに対して、その力が目張りテープを下地板に押し付ける方向に作用するから剥がれ難く、突き合わせ部での密閉性の維持を図り易い。
また、目張りテープは、防水シート表面から裏面側へ下地板を挟んで離間した位置に設けられているから、防水シート表面での日照に伴う温度変化の影響を受け難く、長期間にわたって密閉効果を発揮することが可能である。 According to the second characteristic configuration of the present invention, in addition to being able to achieve the above-described operation and effect of the first characteristic configuration of the present invention, it is also possible to prevent airflow from below to the butting portion of the base plate. Therefore, the force acts in the direction in which the weather tape is pressed against the base plate, so that it is difficult to peel off, and it is easy to maintain the sealing property at the butt portion.
In addition, the weather strip is provided at a position spaced from the waterproof sheet surface to the back surface with the base plate sandwiched between them, so it is not easily affected by temperature changes due to sunlight on the waterproof sheet surface, and has a sealing effect over a long period of time. It is possible to demonstrate.

本発明の第３の特徴構成は、前記目張りテープは、両面テープであるところにある。 According to a third characteristic configuration of the present invention, the weather strip is a double-sided tape.

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、屋根下地上に目張りテープを貼着した状態で、その上に前記下地板を載置するだけで、目張りテープを介して屋根下地に下地板を仮固定することができる。従って、突き合わせ部の密閉作業と下地板の仮固定作業とを一度に実施できることから、屋根形成作業の効率向上を図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, in a state where a weather tape is adhered on the roof base, By simply placing the base plate thereon, the base plate can be temporarily fixed to the roof base via a weather strip. Therefore, since the sealing operation of the butting portion and the temporary fixing operation of the base plate can be performed at a time, the efficiency of the roof forming operation can be improved.

本発明の第４の特徴構成は、屋根下地上に複数の下地板が並べて設置され、それら下地板上を覆う状態に防水シートが配置され、分散配置された防水シート固定部で前記防水シートが固定してある防水構造において、前記複数の下地板どうしの突き合わせ部における下地板厚み方向への風抜けを防止自在で、且つ、伸縮自在な充填材が、前記突き合わせ部で両下地板にわたって一体となる状態に充填してあるところにある。 According to a fourth characteristic configuration of the present invention, a plurality of base plates are installed side by side on a roof base, a waterproof sheet is disposed in a state of covering the base plates, and the waterproof sheet is disposed in a dispersedly disposed waterproof sheet fixing portion. In the waterproof structure that is fixed, the filler can be prevented from being blown out in the thickness direction of the base plate at the butting portions of the plurality of base plates, and the stretchable filler is integrated over both base plates at the butting portion. It is in a state where it is filled in a state.

本発明の第４の特徴構成によれば、前記充填材によって各下地板どうしの突き合わせ部の密閉を図ることができ、下地板厚み方向への風抜けを防止することができる。
しかも、充填材が伸縮性を備えているから、仮に下地板の熱膨張・収縮の繰り返しによって突き合わせ部に目開きが生じようとしても、その動きに追従でき、突き合わせ部の密閉状態を維持することが可能となる。
従って、下地板の突き合わせ部の密閉をより確実に図ることができるようになり、例えば、防水シートが、風の負圧で吸い上げられるような力を受けても、防水シートと下地板との間の空間が減圧されることで防水シートの上昇を抑制し易くなる。その結果、必要以上に短い間隔で防水シート固定部を設けなくても防水シートの波立ち防止を図ることができ、施工手間やコストを掛けずに強風に強い防水構造とすることが可能となる。
また、前記突き合わせ部の形状が不揃いであっても、その不揃いな充填空間に対して馴染む状態に前記充填材を充填することができ、より確実な密閉効果を発揮することができる。 According to the 4th characteristic structure of this invention, the sealing part of each base plate can be sealed with the said filler, and the ventilation | gas_flowing to a base plate thickness direction can be prevented.
In addition, since the filler has elasticity, even if the opening of the butt is caused by repeated thermal expansion and contraction of the base plate, it can follow the movement and maintain the sealed state of the butt. Is possible.
Accordingly, the butted portion of the base plate can be sealed more reliably. For example, even when the waterproof sheet receives a force that is sucked up by the negative pressure of the wind, It becomes easy to suppress the rise of the waterproof sheet by depressurizing the space. As a result, it is possible to prevent the waterproof sheet from wobbling without providing the waterproof sheet fixing portion at an interval shorter than necessary, and it is possible to provide a waterproof structure that is strong against strong winds without requiring labor and cost.
Moreover, even if the shape of the abutting portion is not uniform, the filler can be filled in a state that is compatible with the uneven filling space, and a more reliable sealing effect can be exhibited.

本発明の第５の特徴構成は、前記充填材は、前記突き合わせ部に形成された両下地板間のアリ溝内に充填してあるところにある。 According to a fifth characteristic configuration of the present invention, the filler is filled in dovetail grooves between both base plates formed in the butt portion.

本発明の第５の特徴構成によれば、本発明の第４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、アリ溝内に充填材が充填されることで、アリ溝から充填材が抜け出し難くでき、長期間にわたって前記突き合わせ部での密閉性の維持を図ることが可能となる。 According to the fifth characteristic configuration of the present invention, in addition to being able to achieve the above-described operational effect according to the fourth characteristic configuration of the present invention, the dovetail groove is filled with the filler, whereby the dovetail groove Therefore, it is possible to make it difficult for the filler to come out, and it is possible to maintain the sealing property at the butt portion over a long period of time.

以下に本発明の実施の形態を図面に基づいて説明する。 Embodiments of the present invention will be described below with reference to the drawings.

〔第１実施形態〕
図１、図２は、本発明の防水構造を採用した屋根の一例を示すもので、金属製折板（屋根下地に相当）１の上方に、複数の断熱板（下地板に相当）２を並設すると共に、その上を覆う状態に防水シート３を敷設して構成してある。 [First Embodiment]
FIG. 1 and FIG. 2 show an example of a roof employing the waterproof structure of the present invention. A plurality of heat insulating plates (corresponding to a base plate) 2 are provided above a metal folded plate (corresponding to a roof base) 1. In addition to being arranged side by side, the waterproof sheet 3 is laid in a state of covering the top.

前記金属製折板（以後、単に折板という）１は、金属板（例えば、亜鉛メッキ鋼板）を図に示すように谷と山とが交互に位置するジグザグ（波板）形状に成形してある長尺体で、複数の折板１を、側部の一部どうしが重なる状態に並設して屋根の基本構造を形成してある。当該実施形態においては、所謂「折板」を使用しているが、この折板に限るものではなく、例えば、単なる平らな金属板や、所謂「デッキプレート」や、野地板、屋根構造部材等、屋根としての下地となるものであればよい。
また、折板１は、屋根面に沿って間隔を開けて配置された複数の梁（又は、母屋）４上にわたってボルト固定されている。 The metal folded plate (hereinafter simply referred to as a folded plate) 1 is formed by forming a metal plate (for example, a galvanized steel plate) into a zigzag (corrugated plate) shape in which valleys and peaks are alternately located as shown in the figure. A basic structure of a roof is formed by arranging a plurality of folded plates 1 side by side in such a manner that a part of the side portions overlap each other. In this embodiment, a so-called “folded plate” is used, but is not limited to this folded plate. For example, a simple flat metal plate, a so-called “deck plate”, a field plate, a roof structure member, etc. Any material can be used as a base for the roof.
The folded plate 1 is bolted over a plurality of beams (or purlins) 4 arranged at intervals along the roof surface.

前記断熱板２は、本実施形態においては耐火性を備えさせてあり、断熱本体部２ｂと、その外側の金属外皮部２ａとを一体に形成して構成してある（図２、図３参照）。
断熱板２は、細長い板形状に形成してあり、前記折板１の長手方向と直交する方向にその長手方向を向けて配置される（図１参照）。また、各断熱板２の両側縁部は、隣接させる別の断熱板２と嵌合連結できるように、嵌合部６をそれぞれ設けてある。この嵌合部６は、当該実施形態においては、図２、図３に示すように、実継ぎ構造をもって構成してある。
具体的には、断熱板２の一方の側縁部には、嵌合凸部６ａを長手方向の全長にわたって形成してあり、他方の側縁部には、隣接させる別の断熱板２の嵌合凸部６ａと嵌合できる形状に形成された嵌合凹部６ｂを、長手方向の全長にわたって形成してある。
従って、前記屋根面に沿って設置された各折板１上に、各断熱板２を配置する際に、順次、隣り合う断熱板２の前記嵌合凸部６ａと嵌合凹部６ｂどうしを嵌合させることによって、夫々の断熱板２を簡単に整列状態に連結することが可能となる。 In the present embodiment, the heat insulating plate 2 is provided with fire resistance, and is formed by integrally forming a heat insulating main body 2b and an outer metal skin 2a (see FIGS. 2 and 3). ).
The heat insulating plate 2 is formed in an elongated plate shape, and is arranged with its longitudinal direction facing in a direction orthogonal to the longitudinal direction of the folded plate 1 (see FIG. 1). Moreover, the both edge parts of each heat insulation board 2 are each provided with the fitting part 6 so that it can carry out fitting connection with another heat insulation board 2 to adjoin. In this embodiment, the fitting portion 6 has a real joint structure as shown in FIGS.
Specifically, one side edge of the heat insulating plate 2 is formed with a fitting protrusion 6a over the entire length in the longitudinal direction, and the other side edge is fitted with another heat insulating plate 2 to be adjacent. A fitting recess 6b formed in a shape that can be fitted with the mating projection 6a is formed over the entire length in the longitudinal direction.
Accordingly, when the heat insulating plates 2 are arranged on the folded plates 1 installed along the roof surface, the fitting convex portions 6a and the fitting concave portions 6b of the adjacent heat insulating plates 2 are sequentially fitted. By combining, it becomes possible to connect each heat insulation board 2 to an alignment state easily.

また、前記断熱本体部２ｂは、例えば、イソシアネートのフォーム材で形成してあり、適度な強度と耐熱性を備えている他、無数の気泡が内在していることによって、高い断熱性能を発揮できるように構成してある。
そして、前記金属外皮部２ａは、前記断熱本体部２ｂの外周面を包み込む状態に一体的に設けられている。この金属外皮部２ａは、具体例として、亜鉛メッキ鋼板の薄板材で構成してある。 Further, the heat insulating main body 2b is formed of, for example, an isocyanate foam material, and has high strength and heat resistance. In addition, the heat insulating main body 2b can exhibit high heat insulating performance by including innumerable bubbles. It is constituted as follows.
And the said metal skin part 2a is integrally provided in the state which wraps the outer peripheral surface of the said heat insulation main-body part 2b. As a specific example, the metal skin portion 2a is formed of a thin plate material of a galvanized steel plate.

前記防水シート３は、合成樹脂製シート（例えば、軟質塩化ビニル）によって構成してあり、敷設された前記断熱板２上に、例えば、固定金具７等を使用して固定される。
この固定金具７は、円板部７ａと、円板部７ａを前記折板１に固定するネジ７ｂとで構成してあり、円板部７ａの上面に前記防水シート３が接着される。前記断熱板２上には、所定のピッチで前記固定金具７が分散状態に配置されており、前記固定金具７の取付位置が、防水シート固定部Ｐとなる。 The waterproof sheet 3 is made of a synthetic resin sheet (for example, soft vinyl chloride), and is fixed on the heat insulating plate 2 laid by using, for example, a fixing metal 7 or the like.
The fixing bracket 7 includes a disc portion 7a and a screw 7b for fixing the disc portion 7a to the folded plate 1. The waterproof sheet 3 is bonded to the upper surface of the disc portion 7a. On the heat insulating plate 2, the fixing brackets 7 are arranged in a dispersed state at a predetermined pitch, and the mounting position of the fixing bracket 7 is the waterproof sheet fixing portion P.

また、前記複数の断熱板２どうしの突き合わせ部Ｔには、伸縮自在な目張りテープＭが両断熱板２にわたる状態に貼着してある。この目張りテープＭは、合成樹脂製で構成してあり、前記突き合わせ部Ｔにおける断熱板２厚み方向への風抜けを防止することができ、本実施形態においては、断熱板２の表裏両面に各別に設けられている。
従って、例えば、温度変化等の影響で断熱板２が伸縮して、前記突き合わせ部が目開きしたとしても、前記目張りテープＭによって隙間を遮蔽した状態を維持できる。 Further, a stretchable cover tape M is stuck to the abutting portions T of the plurality of heat insulating plates 2 so as to extend over both heat insulating plates 2. The weather strip M is made of a synthetic resin, and can prevent the airflow in the thickness direction of the heat insulating plate 2 at the butting portion T. In the present embodiment, each of the front and back surfaces of the heat insulating plate 2 It is provided separately.
Therefore, for example, even if the heat insulating plate 2 expands and contracts due to a change in temperature or the like and the butt portion is opened, the state where the gap is shielded by the weather strip M can be maintained.

その結果、例えば、防水シート３の上方に吹く風によって発生する負圧が原因で、防水シート３に吸い上げられるような力が作用しても、防水シート３の裏面空間の気密性を維持でき、吸い上げに抵抗することができる。即ち、風による防水シート３の波立ち減少を抑制することが可能となり、前記防水シート３における防水シート固定部Ｐ周縁に極端な歪みが集中して防水シートが破れたり疲労すると言ったことを未然に防止でき、防水層を健全な状態に維持し易くできる。 As a result, for example, due to the negative pressure generated by the wind blowing above the waterproof sheet 3, even if a force that is sucked up by the waterproof sheet 3 acts, the airtightness of the back surface space of the waterproof sheet 3 can be maintained, Can resist wicking. That is, it is possible to suppress a decrease in the ripples of the waterproof sheet 3 due to wind, and it has been said that the waterproof sheet is torn or fatigued due to extreme distortion concentrated on the periphery of the waterproof sheet fixing portion P in the waterproof sheet 3. It can prevent, and it can make it easy to maintain a waterproof layer in a healthy state.

〔第２実施形態〕
図４は、本発明の防水構造を採用した第二の実施形態の屋根を示すもので、先の実施形態と同様の構成に関しては、その説明を省き、異なる構成を主に説明する。 [Second Embodiment]
FIG. 4 shows a roof according to a second embodiment that employs the waterproof structure of the present invention. With respect to the same configuration as the previous embodiment, the description thereof is omitted, and different configurations are mainly described.

前記断熱板２は、隣接する断熱板２との突き合わせ部Ｔとなる端面の上縁部に、図に示すように、全長にわたって切欠き８ａが形成してある。この切欠き８ａは、その切欠き縦面が下方側ほど突き合わせ面より遠ざかる状態に傾斜させて構成してある。
従って、断熱板２どうしを突き合わせることで、その突き合わせ部Ｔでそれぞれの切欠き８ａが合わさってアリ溝８が構成される。 As shown in the drawing, the heat insulating plate 2 has a notch 8a formed at the upper edge portion of the end surface that becomes the abutting portion T with the adjacent heat insulating plate 2. The notch 8a is configured to be inclined so that the notch vertical surface is further away from the abutting surface toward the lower side.
Therefore, when the heat insulating plates 2 are abutted with each other, the notches 8a are brought together at the abutting portion T to form the dovetail groove 8.

そして、このアリ溝８には、伸縮自在な軟質合成樹脂製の充填材Ｊが充填してあり、アリ溝８内周壁と充填材Ｊとの固着強度に加えて、両者の物理的な嵌合構造によって、より強力に、突き合わせ部Ｔでの密閉効果を発揮することができる。
尚、図には示さないが、アリ溝８の上から、両断熱板２と充填材Ｊとを覆う状態に、先の実施形態で説明した目張りテープＭを接着すれば、更に、突き合わせ部の目開き防止効果が向上し、風の影響を受け難い防水構造を提供することができる。 The dovetail groove 8 is filled with a flexible synthetic resin filler J that can be expanded and contracted. In addition to the adhesive strength between the inner wall of the dovetail groove 8 and the filler J, the physical fit between the two Depending on the structure, the sealing effect at the butt portion T can be exerted more powerfully.
Although not shown in the figure, if the weathering tape M described in the previous embodiment is bonded to the dovetail groove 8 so as to cover both the heat insulating plates 2 and the filler J, the butt portion is further improved. The effect of preventing opening can be improved, and a waterproof structure that is hardly affected by wind can be provided.

〔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〉前記屋根下地は、先の実施形態で説明した金属製折板１に限るものではなく、例えば、デッキプレートや、野地板や、ＡＬＣ板等であってもよい。また、下地板２そのものに強度が期待できる場合には、下地板２を支持する梁や桁をもって屋根下地とするものであってもよい。但し、下方空間と下地板２裏面部空間とが連通しない状態に形成された屋根（例えば、コンクリートスラブ等）は、対象外である。
要するに、屋根下地は、下地板２を支持でき、下地板２の裏面部空間に対して何らかの形で空気が流れ込む可能性のあるものが対象となり、それらを総称して屋根下地という。
また、屋根下地そのものの材質は特に限定されるものではない。
〈２〉前記防水シート３は、先の実施形態で説明した合成樹脂製防水シートに限るものではなく、例えば、合成ゴム製シートやアスファルトシート等の防水シート、又は、それらの積層体等であってもよく、それらを含めて防水シートと総称する。
また、防水シートに、ガラス繊維やポリエステル繊維等の繊維性基材を、層状又は全体に混入させてあってもよく、補強効果と共に寸法安定効果等を発揮させることも可能である。
〈３〉前記下地板２は、先の実施形態で説明したように隣接するものどうしを前記嵌合部６によって連結できるように構成してあるものに限るものではなく、例えば、側縁部どうしを単純に突き合わせるだけの構成であってもよい。更には、断熱本体部２ｂの外周面を金属外皮部２ａで包み込む状態に形成した断熱板に限るものではなく、例えば、断熱本体部のみによる構成であったり、更には、断熱性能そのものが低い材料で構成してあってもよい。要するに、防水シートの下地となり得るものであればよく、それらを含めて下地板２と総称する。従って、下地板が、野地板やＡＬＣ板等で構成される場合もある。
〈４〉前記目張りテープは、先の実施形態で説明したように、下地板の表裏両面に各別に貼着する事に限らず、表面、又は、裏面の何れか一方にのみ貼着するものであってもよい。但し、防水シートが吸い上げられるに伴って下地板どうしの突き合わせ部を通した下方空間からの空気の上昇に対しては、下地板どうしの裏面側にわたって目張りテープを貼着する方が剥がれにくくて好ましい。
また、前記目張りテープは、両面テープで構成してあってもよく、その場合、例えば、下地板の裏面側に使用する場合は、屋根下地に予め目張りテープを貼着した後、その上に下地板を設置すれば、仮固定を図ることができる。一方、下地板の表面側に使用する場合は、前記固定金具と合わせて、防水シートの固定を図ることが可能となる。
〈５〉充填材Ｊは、その充填対象部の形状が、先の実施形態で説明したようにアリ溝である事に限らず、例えば、矩形断面の溝であったり、開口端部側ほど幅広の溝であってもよい。また、下地板の上縁部にのみ充填される構成に限らず、下縁部にのみ充填される構成や、上下両縁部に充填される構成であってもよい。更には、前記目張りテープと組み合わすことであってもよい。 <1> The roof base is not limited to the metal folded plate 1 described in the previous embodiment, and may be, for example, a deck plate, a field plate, an ALC plate, or the like. In addition, when the base plate 2 itself can be expected to have strength, the roof base may be a beam or girder that supports the base plate 2. However, the roof (for example, concrete slab etc.) formed in the state where the lower space and the base plate 2 back surface space do not communicate with each other is out of the object.
In short, the roof base is intended to support the base plate 2 and has a possibility that air may flow into the back surface space of the base plate 2 in some form, and these are collectively referred to as the roof base.
Moreover, the material of the roof base itself is not particularly limited.
<2> The waterproof sheet 3 is not limited to the synthetic resin waterproof sheet described in the previous embodiment, and may be, for example, a waterproof sheet such as a synthetic rubber sheet or an asphalt sheet, or a laminate thereof. They may be collectively referred to as a waterproof sheet.
Further, a fibrous base material such as glass fiber or polyester fiber may be mixed into the waterproof sheet in the form of a layer or the whole, and it is possible to exert a dimensional stability effect as well as a reinforcing effect.
<3> The base plate 2 is not limited to one configured so that adjacent ones can be connected by the fitting portion 6 as described in the previous embodiment. It is also possible to have a configuration in which the two are simply matched. Furthermore, the heat insulating plate is not limited to a heat insulating plate formed so that the outer peripheral surface of the heat insulating main body 2b is wrapped with the metal skin portion 2a. It may be configured with. In short, it may be anything that can serve as a base for the waterproof sheet, and collectively includes the base plate 2. Therefore, the base plate may be composed of a field plate, an ALC plate, or the like.
<4> As described in the previous embodiment, the weather strip is not limited to being individually attached to both the front and back surfaces of the base plate, but is attached only to either the front surface or the back surface. There may be. However, with respect to the rise of air from the lower space through the butted portions of the base plates as the waterproof sheet is sucked up, it is preferable that the cover tape is stuck on the back side of the base plates because it is difficult to peel off. .
Further, the weather tape may be composed of a double-sided tape. In this case, for example, when used on the back surface side of the base plate, after attaching the weather tape to the roof base in advance, the lower tape is placed thereon. If a base plate is installed, temporary fixing can be achieved. On the other hand, when used on the surface side of the base plate, the waterproof sheet can be fixed together with the fixing bracket.
<5> The filler J is not limited to the dovetail shape as described in the previous embodiment. For example, the filler J is a groove having a rectangular cross section or wider toward the opening end. It may be a groove. In addition, the configuration is not limited to filling only the upper edge portion of the base plate, but may be a configuration filling only the lower edge portion or a configuration filling both the upper and lower edge portions. Further, it may be combined with the weather tape.

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。 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.

第一実施形態の防水構造を示す一部切欠き斜視図Partially cutaway perspective view showing the waterproof structure of the first embodiment 第一実施形態の防水構造を示す側方視での要部断面図Sectional drawing of the principal part in the side view which shows the waterproof structure of 1st embodiment 第一実施形態での下地板を示す断面図Sectional drawing which shows the baseplate in 1st embodiment 第二実施形態の防水構造を示す側方視での要部断面図Main part sectional drawing in the side view which shows the waterproof structure of 2nd embodiment 従来の防水構造を示す側方視での要部断面図Cross-sectional view of main parts in side view showing conventional waterproof structure

Explanation of symbols

１金属製折板（屋根下地に相当）
２断熱板（下地板に相当）
３防水シート
８アリ溝
Ｊ充填材
Ｍ目張りテープ
Ｐ防水シート固定部
Ｔ突き合わせ部 1 Metal folded plate (equivalent to a roof base)
2 Insulation plate (equivalent to base plate)
3 Waterproof sheet 8 Dovetail J Filling material M Sealing tape P Waterproof sheet fixing part T Butting part

Claims

A waterproof structure in which a plurality of base plates are installed side by side on a roof base, a waterproof sheet is disposed in a state of covering the base plates, and the waterproof sheet is fixed by waterproof sheet fixing portions arranged in a distributed manner,
A waterproof structure in which a wind tape in the thickness direction of the base plate at the abutting portions of the plurality of base plates can be prevented, and a stretchable weather tape is bonded to the base plate at the abutting portion.

The waterproof structure according to claim 1, wherein the weather tape is bonded to at least the back side of the base plates.

The waterproof structure according to claim 1, wherein the weather strip is a double-sided tape.

A waterproof structure in which a plurality of base plates are installed side by side on a roof base, a waterproof sheet is disposed in a state of covering the base plates, and the waterproof sheet is fixed by waterproof sheet fixing portions arranged in a distributed manner,
A waterproofing material in which a stretchable filler that can be prevented from being blown out in the thickness direction of the base plate at the abutting portions of the plurality of base plates is filled in a state of being united over the base plates at the abutting portion. Construction.

The waterproof structure according to claim 4, wherein the filler is filled in a dovetail groove between both base plates formed in the butt portion.