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JP7172437B2 - double glazing - Google Patents

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JP7172437B2
JP7172437B2 JP2018199842A JP2018199842A JP7172437B2 JP 7172437 B2 JP7172437 B2 JP 7172437B2 JP 2018199842 A JP2018199842 A JP 2018199842A JP 2018199842 A JP2018199842 A JP 2018199842A JP 7172437 B2 JP7172437 B2 JP 7172437B2
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glass plate
seal
seal portion
glass
double glazing
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JP2020066546A (en
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英一郎 桑原
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Nippon Electric Glass Co Ltd
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Nippon Electric Glass Co Ltd
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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
    • Y02A30/24—Structural elements or technologies for improving thermal insulation
    • Y02A30/249—Glazing, e.g. vacuum glazing
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B80/00—Architectural or constructional elements improving the thermal performance of buildings
    • Y02B80/22—Glazing, e.g. vaccum glazing

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  • Securing Of Glass Panes Or The Like (AREA)
  • Special Wing (AREA)
  • Joining Of Glass To Other Materials (AREA)

Description

本発明は、複層ガラスに関する。 The present invention relates to double glazing.

特許文献１には、一対のガラス板と、一対のガラス板の間に空隙部を形成するスペーサーと、一対のガラス板の周縁部を接着することで空隙部（中間層）を封止するシールと、を備える複層ガラスが記載されている。 Patent Document 1 discloses a pair of glass plates, a spacer that forms a gap between the pair of glass plates, a seal that seals the gap (intermediate layer) by bonding the peripheral edges of the pair of glass plates, is described.

特開２０００－６４７３３号公報JP-A-2000-64733

ところが、上記のような複層ガラスは、火災時に、シールによって封止された空隙部が膨張し、一対のガラス板に大きな圧力が作用するおそれがある。本発明の目的は、火災時に中間層の気体が膨張することで、ガラス板に大きな圧力が作用することを抑制できる複層ガラスを提供することである。 However, in the double glazing as described above, there is a possibility that, in the event of a fire, the gap sealed by the seal expands, and a large pressure acts on the pair of glass plates. SUMMARY OF THE INVENTION An object of the present invention is to provide a double glazing that can suppress the action of a large pressure on the glass sheets due to the expansion of the gas in the intermediate layer in the event of a fire.

以下、上記課題を解決するための手段及びその作用効果について記載する。
上記課題を解決する複層ガラスは、第１ガラス板と、前記第１ガラス板と間隔をおいて配置される第２ガラス板と、前記第１ガラス板及び前記第２ガラス板の間に位置する中間層を封止するように前記第１ガラス板及び前記第２ガラス板の周縁部同士を接合するシールと、を備える複層ガラスであって、前記シールは、前記第１ガラス板及び前記第２ガラス板の周縁部に沿って配置される第１シール部及び第２シール部を有し、前記第２シール部は、前記第１シール部よりもシール性が低い。 Means for solving the above problems and their effects will be described below.
A multi-layer glass for solving the above problems includes a first glass plate, a second glass plate spaced apart from the first glass plate, and an intermediate glass plate positioned between the first glass plate and the second glass plate. a seal joining peripheral edges of the first glass sheet and the second glass sheet in a layer-sealing manner, wherein the seal comprises the first glass sheet and the second glass sheet; It has a first seal portion and a second seal portion that are arranged along the peripheral edge of the glass plate, and the second seal portion has lower sealing performance than the first seal portion.

上記構成によれば、第２シール部は、第１シール部よりもシール性が低いため、第２シール部がガラス板から剥がれやすくなる。このため、火災時に中間層で膨張する気体は、第２シール部とガラス板との間に形成される隙間から中間層の外部に排出される。こうして、複層ガラスは、火災時に、中間層の圧力上昇を抑制し、ガラス板に大きな圧力が作用することを抑制できる。 According to the above configuration, since the second seal portion has a lower sealing performance than the first seal portion, the second seal portion is easily peeled off from the glass plate. Therefore, the gas that expands in the intermediate layer during a fire is discharged to the outside of the intermediate layer through the gap formed between the second seal portion and the glass plate. In this way, the double glazing can suppress the pressure rise in the intermediate layer and suppress the application of large pressure to the glass sheets in the event of a fire.

上記複層ガラスにおいて、前記第２シール部は、前記第１シール部よりも、温度上昇時により軟化しやすい材質であることが好ましい。
上記構成によれば、火災時に第２シール部がガラス板からより剥がれやすくなる。 In the above double glazing, it is preferable that the second sealing portion is made of a material that softens more easily when the temperature rises than the first sealing portion.
According to the above configuration, the second seal portion is more easily peeled off from the glass plate in case of fire.

上記複層ガラスにおいて、前記第２シール部の前記第１ガラス板及び前記第２ガラス板に対する単位面積あたりの接着力は、前記第１シール部の前記第１ガラス板及び前記第２ガラス板に対する単位面積あたりの接着力よりも小さいことが好ましい。 In the multi-layer glass, the adhesive strength per unit area of the second seal portion to the first glass plate and the second glass plate is It is preferably smaller than the adhesive force per unit area.

上記構成によれば、火災時に第２シール部がガラス板からより剥がれやすくなる。
上記複層ガラスにおいて、前記第２シール部の弾性率は、前記第１シール部の弾性率よりも低いことが好ましい。 According to the above configuration, the second seal portion is more easily peeled off from the glass plate in case of fire.
In the double glazing described above, it is preferable that the elastic modulus of the second seal portion is lower than the elastic modulus of the first seal portion.

上記構成によれば、火災時に第２シール部がガラス板からより剥がれやすくなる。
上記複層ガラスにおいて、前記第１ガラス板及び前記第２ガラス板は、矩形板状をなし、前記第２シール部は、前記第１ガラス板の隅部と前記第２ガラス板の隅部との間に配置されることが好ましい。 According to the above configuration, the second seal portion is more easily peeled off from the glass plate in case of fire.
In the multi-layer glass, the first glass plate and the second glass plate are rectangular plates, and the second seal portion is formed between the corners of the first glass plate and the corners of the second glass plate. is preferably placed between

火災時に中間層で気体が膨張する場合、複層ガラスの隅部に大きな負荷が作用しやすい。この点、上記構成によれば、第２シール部が複層ガラスの隅部に配置されるため、火災時に中間層で膨張する気体をガラス板と第２シール部との間にできる隙間から逃がしやすくできる。 When gas expands in the middle layer during a fire, a large load is likely to act on the corners of the double glazing. In this regard, according to the above configuration, since the second seal portion is arranged at the corner of the double-glazed glass, the gas expanding in the intermediate layer in the event of a fire can escape from the gap formed between the glass plate and the second seal portion. It can be done easily.

上記構成の複層ガラスは、火災時に中間層の気体が膨張することで、ガラス板に大きな圧力が作用することを抑制できる。 The multi-layer glass having the above structure can suppress the application of large pressure to the glass sheets due to the expansion of the gas in the intermediate layer during a fire.

複層ガラスの隅部を斜め下方から見たときの部分斜視図。FIG. 4 is a partial perspective view of the corner of the multi-layered glass as seen obliquely from below; （ａ），（ｂ）は、積層ガラスの隅部における部分断面図。(a), (b) is a partial sectional view in the corner of laminated glass. 第１の変更例に係る積層ガラスの隅部における部分断面図。The partial sectional view in the corner of the laminated glass which concerns on the 1st modification. 第２の変更例に係る積層ガラスの隅部における部分断面図。The partial sectional view in the corner of the laminated glass which concerns on the 2nd example of a change.

以下、複層ガラスの一実施形態について図面を参照しつつ説明する。本実施形態の複層ガラスは、防火設備として、建物の外壁の開口部に使用されることを想定する。
図１に示すように、複層ガラス１０は、矩形板状をなす第１ガラス板２０及び第２ガラス板３０と、第１ガラス板２０及び第２ガラス板３０の間に中間層ＩＬを形成するためのスペーサー４０と、中間層ＩＬを封止するシール５０と、を備える。 An embodiment of double glazing will be described below with reference to the drawings. It is assumed that the multi-layered glass of this embodiment is used for openings in the outer walls of buildings as fire prevention equipment.
As shown in FIG. 1, the double glazing 10 includes a first glass plate 20 and a second glass plate 30 having rectangular plate shapes, and an intermediate layer IL formed between the first glass plate 20 and the second glass plate 30. and a seal 50 for sealing the intermediate layer IL.

第１ガラス板２０は、Ｌｏｗ－Ｅガラス（低放射ガラス）であり、第２ガラス板３０は、防火ガラスである。そして、第１ガラス板２０の第２ガラス板３０を向く面には、低放射膜２１が形成される。第２ガラス板３０は、例えば、耐熱性結晶化ガラスなどで構成すればよい。第１ガラス板２０及び第２ガラス板３０は、スペーサー４０により間隔をおいて配置される。 The first glass plate 20 is Low-E glass (low-emissivity glass), and the second glass plate 30 is fire glass. A low-emissivity film 21 is formed on the surface of the first glass plate 20 facing the second glass plate 30 . The second glass plate 30 may be made of, for example, heat-resistant crystallized glass. The first glass plate 20 and the second glass plate 30 are spaced apart by spacers 40 .

スペーサー４０は、断面形状が矩形形状をなす筒状部材を枠状に連結した部材である。スペーサー４０の幅により、中間層ＩＬの厚さが決定される。スペーサー４０の材質は、アルミニウムなどの金属、樹脂、セラミックス又はこれらの複合材であればよい。スペーサー４０における中間層ＩＬと対向する面には、複数の貫通孔４１が形成される。この場合、スペーサー４０の内部に乾燥剤４２を入れることで、中間層ＩＬを低湿に保つことができる。 The spacer 40 is a member in which tubular members having a rectangular cross-sectional shape are connected in a frame shape. The width of the spacer 40 determines the thickness of the intermediate layer IL. The material of the spacer 40 may be metal such as aluminum, resin, ceramics, or a composite material thereof. A plurality of through holes 41 are formed in the surface of the spacer 40 facing the intermediate layer IL. In this case, by inserting a desiccant 42 inside the spacer 40, the intermediate layer IL can be kept at a low humidity.

中間層ＩＬは、乾燥した空気で満たされる。中間層ＩＬは、遮熱性能を高めるために、アルゴンガス、クリプトンガス又はキセノンガスで満たされてもよい。適度な厚さの中間層ＩＬを設けることで、複層ガラス１０の厚さ方向に熱が移動しにくくなる。 The intermediate layer IL is filled with dry air. The intermediate layer IL may be filled with argon gas, krypton gas, or xenon gas to enhance heat shielding performance. By providing the intermediate layer IL with an appropriate thickness, it becomes difficult for heat to move in the thickness direction of the double glazing 10 .

シール５０は、第１ガラス板２０及び第２ガラス板３０とスペーサー４０との間に配置される１次シール６０と、スペーサー４０の外方において、第１ガラス板２０及び第２ガラス板３０の間に配置される２次シール７０と、を有する。１次シール６０及び２次シール７０は、矩形枠状に構成される。 The seal 50 includes a primary seal 60 disposed between the first glass plate 20 and the second glass plate 30 and the spacer 40 , and a primary seal 60 located outside the spacer 40 between the first glass plate 20 and the second glass plate 30 . and a secondary seal 70 disposed therebetween. The primary seal 60 and secondary seal 70 are configured in the shape of a rectangular frame.

１次シール６０は、第１ガラス板２０及び第２ガラス板３０とスペーサー４０とを接合し、中間層ＩＬへの湿気などの気体の進入を抑制する。１次シール６０は、ブチルゴムなどの気体を透過しにくいシーリング材で構成される。 The primary seal 60 joins the first glass plate 20 and the second glass plate 30 to the spacer 40 and prevents gas such as moisture from entering the intermediate layer IL. The primary seal 60 is made of a sealing material such as butyl rubber that is difficult to permeate gas.

２次シール７０は、第１ガラス板２０及び第２ガラス板３０の周縁部同士をスペーサー４０の幅に応じた間隔で接合し、第１ガラス板２０及び第２ガラス板３０を相対的に位置決めする。このため、複層ガラス１０の厚さ方向において、２次シール７０は１次シール６０よりも厚い。また、２次シール７０は、矩形枠状をなす２次シール７０の直線部を構成する第１シール部７１と、矩形枠状をなす２次シール７０の隅部を構成する第２シール部７２と、を含む。第１シール部７１及び第２シール部７２は、第１ガラス板２０及び第２ガラス板３０の周縁部に沿って隣り合うように配置される。 The secondary seal 70 joins the peripheral edge portions of the first glass plate 20 and the second glass plate 30 at intervals corresponding to the width of the spacer 40, and positions the first glass plate 20 and the second glass plate 30 relative to each other. do. Therefore, the secondary seal 70 is thicker than the primary seal 60 in the thickness direction of the double glazing 10 . The secondary seal 70 has a first seal portion 71 forming a linear portion of the secondary seal 70 having a rectangular frame shape and a second seal portion 72 forming a corner portion of the secondary seal 70 having a rectangular frame shape. and including. The first sealing portion 71 and the second sealing portion 72 are arranged adjacent to each other along the peripheral edges of the first glass plate 20 and the second glass plate 30 .

第１シール部７１は、例えば、シリコーン系シーリング材及びポリサルファイド系シーリング材などの耐熱性を有するシーリング材で構成される。第１シール部７１は、これらのシーリング材を第１ガラス板２０及び第２ガラス板３０の間に充填することで形成される。 The first seal portion 71 is made of a heat-resistant sealing material such as a silicone-based sealing material and a polysulfide-based sealing material. The first sealing portion 71 is formed by filling the space between the first glass plate 20 and the second glass plate 30 with these sealing materials.

第２シール部７２は、常温において、２次シール７０として要求される性能は満たしつつ、１００℃程度で軟化する材料、言い換えれば火災時に軟化する材料で構成される。このため、第２シール部７２は、例えば、ポリスチレン樹脂、ポリ塩化ビニル樹脂及びアクリル樹脂などの比較的軟化温度が低い材料で構成される。第２シール部７２は、これらのシーリング材を第１ガラス板２０及び第２ガラス板３０の間に充填することで形成される。 The second seal portion 72 is made of a material that softens at about 100° C., in other words, a material that softens in the event of a fire while satisfying the performance required of the secondary seal 70 at room temperature. Therefore, the second seal portion 72 is made of a material having a relatively low softening temperature, such as polystyrene resin, polyvinyl chloride resin, and acrylic resin. The second sealing portion 72 is formed by filling the space between the first glass plate 20 and the second glass plate 30 with these sealing materials.

また、上述したような材質を選択すると、第２シール部７２は、第１シール部７１と比較して、火災時（加熱時）により軟化しやすくなる。このため、第２シール部７２は、火災時に、第１シール部７１よりもシール性が低くなる。本実施形態において、「シール性が低い」とは、中間層ＩＬ及び中間層ＩＬの外部空間の間で、気体を流出入させやすい性質を言う。つまり、火災などの際に中間層ＩＬの気密が保てなくなる場合には、第２シール部７２が第１シール部７１よりもシール性が低い点で、第２シール部７２と第１ガラス板２０及び第２ガラス板３０との間から気体が出入りすることとなる。 In addition, when the material as described above is selected, the second seal portion 72 is more likely to soften in the event of fire (during heating) than the first seal portion 71 . Therefore, the second seal portion 72 has lower sealing performance than the first seal portion 71 in the event of fire. In the present embodiment, "low sealing performance" refers to the property of allowing gas to easily flow in and out between the intermediate layer IL and the external space of the intermediate layer IL. In other words, when the airtightness of the intermediate layer IL cannot be maintained due to a fire or the like, the second sealing portion 72 and the first glass plate are separated from each other in that the sealing performance of the second sealing portion 72 is lower than that of the first sealing portion 71 . Gas enters and exits from between 20 and the second glass plate 30 .

そして、図１及び図２（ａ），（ｂ）に示すように、スペーサー４０を介して第１ガラス板２０及び第２ガラス板３０がシール５０で接合されることで、複層ガラス１０が構成される。詳しくは、１次シール６０は、複層ガラス１０の板厚方向において、第１ガラス板２０とスペーサー４０との間及び第２ガラス板３０とスペーサー４０との間に配置され、２次シール７０は、複層ガラス１０の板厚方向において、第１ガラス板２０及び第２ガラス板３０の間に配置される。２次シール７０の第１シール部７１は、第１ガラス板２０の周縁部の直線部分及び第２ガラス板３０の周縁部の直線部分との間に配置され、２次シール７０の第２シール部７２は、第１ガラス板２０の隅部及び第２ガラス板３０の隅部との間に配置される。そのため、第１ガラス板２０及び第２ガラス板３０の間に位置する中間層ＩＬは、シール５０によって、密閉空間となる。つまり、中間層ＩＬに外気が出入りすることが抑制される。 Then, as shown in FIGS. 1 and 2 (a) and (b), the first glass plate 20 and the second glass plate 30 are joined with the seal 50 via the spacer 40, so that the multi-layer glass 10 is formed. Configured. Specifically, the primary seal 60 is arranged between the first glass plate 20 and the spacer 40 and between the second glass plate 30 and the spacer 40 in the plate thickness direction of the double glazing 10, and the secondary seal 70 is arranged between the first glass plate 20 and the second glass plate 30 in the plate thickness direction of the multi-layer glass 10 . The first seal portion 71 of the secondary seal 70 is arranged between the linear portion of the peripheral portion of the first glass plate 20 and the linear portion of the peripheral portion of the second glass plate 30, and the second seal portion 71 of the secondary seal 70 The portion 72 is arranged between the corner of the first glass plate 20 and the corner of the second glass plate 30 . Therefore, the intermediate layer IL positioned between the first glass plate 20 and the second glass plate 30 becomes a closed space due to the seal 50 . That is, the entry and exit of outside air into and out of the intermediate layer IL is suppressed.

本実施形態の作用及び効果について説明する。
（１）Ｌｏｗ－Ｅガラスとしての第１ガラス板２０が加熱側となり、防火ガラスとしての第２ガラス板３０が非加熱側となる場合には、第１ガラス板２０が熱割れするものの、第２ガラス板３０が熱割れしにくい。このため、第２ガラス板３０により、加熱側の火炎が非加熱側に到達することが抑制される。さらに、この場合には、加熱により可燃性ガスを発生し得る１次シール６０及び２次シール７０が第２ガラス板３０よりも加熱側に位置する。このため、１次シール６０及び２次シール７０が加熱されることで可燃性ガスが発生しても、当該可燃性ガスにより非加熱側に出火することが抑制される。 The action and effect of this embodiment will be described.
(1) When the first glass plate 20 as Low-E glass is on the heating side and the second glass plate 30 as fire glass is on the non-heating side, the first glass plate 20 is thermally cracked, but the (2) The glass plate 30 is resistant to thermal cracking. Therefore, the second glass plate 30 prevents the flame on the heating side from reaching the non-heating side. Furthermore, in this case, the primary seal 60 and the secondary seal 70 that can generate combustible gas by heating are located on the heating side of the second glass plate 30 . Therefore, even if combustible gas is generated by heating the primary seal 60 and the secondary seal 70, the combustible gas suppresses the ignition of the non-heated side.

一方、防火ガラスとしての第２ガラス板３０が加熱側となり、Ｌｏｗ－Ｅガラスとしての第１ガラス板２０が非加熱側となる場合には、第１ガラス板２０及び第２ガラス板３０の双方のガラス板が熱割れしにくい点で、中間層ＩＬの温度が次第に上昇する。つまり、中間層ＩＬの空気が膨張することにより、中間層ＩＬの圧力が上昇する。このとき、複層ガラス１０は、２次シール７０の第２シール部７２が熱により軟化し、第２シール部７２とガラス板２０，３０とのシール性が低くなる。すると、１次シール６０の隅部、すなわち、１次シール６０において、２次シール７０の第２シール部７２と隣り合う部分が、中間層ＩＬの圧力上昇に耐えられなくなり、１次シール６０の隅部がガラス板２０，３０又はスペーサー４０から剥がれやすくなる。 On the other hand, when the second glass plate 30 as fire glass is on the heating side and the first glass plate 20 as Low-E glass is on the non-heating side, both the first glass plate 20 and the second glass plate 30 are heated. The temperature of the intermediate layer IL gradually rises at the point where the glass sheet of (1) is less likely to be thermally cracked. That is, the expansion of the air in the intermediate layer IL increases the pressure in the intermediate layer IL. At this time, the second seal portion 72 of the secondary seal 70 of the double glazing 10 is softened by heat, and the sealing performance between the second seal portion 72 and the glass plates 20 and 30 is reduced. Then, the corner portion of the primary seal 60, that is, the portion of the primary seal 60 adjacent to the second seal portion 72 of the secondary seal 70 cannot withstand the pressure increase of the intermediate layer IL, and the primary seal 60 is damaged. The corners are easily peeled off from the glass plates 20, 30 or the spacers 40. - 特許庁

その結果、図２（ａ），（ｂ）に白抜矢印で示すように、中間層ＩＬで膨張した気体が、シール５０（１次シール６０及び２次シール７０）とガラス板２０，３０との間に形成される隙間から流出する。詳しくは、２次シール７０において、中間層ＩＬで膨張した気体が、第２シール部７２とガラス板２０，３０との間に形成される隙間から流出する。つまり、複層ガラス１０は、中間層ＩＬの圧力上昇を抑制し、第１ガラス板２０及び第２ガラス板３０が割れる可能性を低減できる。このように、本実施形態の複層ガラス１０は、局所的にシール性の低い部分を設けることで、中間層ＩＬで膨張した気体を中間層ＩＬから逃がすことができる。 As a result, as indicated by white arrows in FIGS. 2(a) and 2(b), the gas expanded in the intermediate layer IL spreads between the seal 50 (the primary seal 60 and the secondary seal 70) and the glass plates 20 and 30. flow out through the gap formed between Specifically, in the secondary seal 70 , the gas expanded in the intermediate layer IL flows out from the gap formed between the second seal portion 72 and the glass plates 20 and 30 . That is, the double glazing 10 can suppress the pressure increase of the intermediate layer IL and reduce the possibility of breaking the first glass plate 20 and the second glass plate 30 . As described above, the double glazing 10 of the present embodiment is provided with a portion having low sealing performance locally, thereby allowing the gas expanded in the intermediate layer IL to escape from the intermediate layer IL.

（２）火災時に中間層ＩＬで気体が膨張する場合、複層ガラス１０の隅部に大きな負荷が作用しやすい。この点、本実施形態によれば、第２シール部７２が複層ガラス１０の隅部に配置されるため、火災時に中間層ＩＬで膨張する気体をガラス板２０，３０と第２シール部７２との間にできる隙間から逃がしやすくできる。そのため、ガラス板２０，３０に作用する付加を減らすことができる。 (2) When gas expands in the intermediate layer IL during a fire, a large load is likely to act on the corners of the double glazing 10 . In this respect, according to the present embodiment, since the second seal portion 72 is arranged at the corner of the double glazing 10, the gas that expands in the intermediate layer IL in the event of a fire is separated from the glass plates 20 and 30 and the second seal portion 72 by the second seal portion 72. It can be easily escaped from the gap that can be made between. Therefore, the load acting on the glass plates 20 and 30 can be reduced.

（３）複層ガラス１０は、従来の複層ガラス１０と比較して、２次シール７０の構成を変更したのみであるため、従来の複層ガラスの製造工程からの変更点を少なくできる。
（４）２次シール７０の第２シール部７２は、複層ガラス１０の端面に現れるため、第２シール部７２を設けた否かの確認を目視で行うことが可能となる。なお、目視による確認を行いやすくするために、第１シール部７１及び第２シール部７２の色を変化させてもよい。 (3) Compared with the conventional double glazing 10, the double glazing 10 only has the configuration of the secondary seal 70 changed.
(4) Since the second seal portion 72 of the secondary seal 70 appears on the end face of the double glazing 10, it is possible to visually confirm whether or not the second seal portion 72 is provided. In order to facilitate visual confirmation, the colors of the first seal portion 71 and the second seal portion 72 may be changed.

本実施形態は、以下のように変更して実施することができる。本実施形態及び以下の変更例は、技術的に矛盾しない範囲で互いに組み合わせて実施することができる。
・図３に示すように、複層ガラス１０は、変更例に係る複層ガラス１０Ａとしてもよい。複層ガラス１０Ａにおいて、２次シール７０Ａの第１シール部７１Ａ及び第２シール部７２Ａは、同じシーリング材を充填することで形成してもよい。この場合、第２シール部７２Ａを形成する部位に対するシーリング材の充填量を、第１シール部７１Ａに対するシーリング材の充填量よりも少なくすることが好ましい。これによれば、第２シール部７２Ａのシール性を第１シール部７１Ａのシール性よりも低くできる。その結果、上記実施形態の効果を得ることができる。 This embodiment can be implemented with the following modifications. This embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.
- As shown in FIG. 3, the double glazing 10 may be a double glazing 10A according to a modified example. In the multi-layer glass 10A, the first seal portion 71A and the second seal portion 72A of the secondary seal 70A may be formed by filling the same sealant. In this case, it is preferable that the filling amount of the sealing material for the portion forming the second sealing portion 72A is smaller than the filling amount of the sealing material for the first sealing portion 71A. According to this, the sealing performance of the second sealing portion 72A can be made lower than the sealing performance of the first sealing portion 71A. As a result, the effects of the above embodiment can be obtained.

・第２シール部７２におけるガラス板２０，３０に対する単位面積あたりの接着力を、第１シール部７１におけるガラス板２０，３０に対する単位面積あたりの接着力よりも小さくしてもよい。例えば、上述の通り、第１シール部７１を形成するシーリング材の成分と、第２シール部７２を形成するシーリング材の成分と、に違いを設けることで、接着力を調整することに加えて、第２シール部７２を形成する部位に面するガラス板２０，３０の内面に、第２シール部７２との接着性を低下させる表面処理を施すことで、接着力を調整してもよい。これによれば、第２シール部７２のシール性を第１シール部７１のシール性よりも低くできる。 The adhesive force per unit area of the second seal portion 72 to the glass plates 20 and 30 may be smaller than the adhesive force per unit area of the first seal portion 71 to the glass plates 20 and 30 . For example, as described above, the components of the sealing material that forms the first seal portion 71 and the components of the sealing material that forms the second seal portion 72 are made different, in addition to adjusting the adhesive force. Alternatively, the inner surfaces of the glass plates 20 and 30 facing the portion where the second seal portion 72 is formed may be subjected to a surface treatment that reduces the adhesiveness to the second seal portion 72, thereby adjusting the adhesive force. According to this, the sealing performance of the second sealing portion 72 can be made lower than the sealing performance of the first sealing portion 71 .

・第２シール部７２の弾性率は、第１シール部７１の弾性率より低くしてもよい。詳しくは、２次シール７０の温度が火災時に想定される温度となる状況下において、第２シール部７２の弾性率は、第１シール部７１の弾性率よりも低くなることが好ましい。これによれば、中間層ＩＬの圧力の上昇により第１シール部７１及び第２シール部７２に作用する力によって、第２シール部７２が第１シール部７１よりも変形しやすくなる。つまり、第２シール部７２のシール性を第１シール部７１のシール性よりも低くできる。 - The elastic modulus of the second seal portion 72 may be lower than the elastic modulus of the first seal portion 71 . Specifically, the elastic modulus of the second seal portion 72 is preferably lower than the elastic modulus of the first seal portion 71 under the condition that the temperature of the secondary seal 70 reaches a temperature assumed in the event of a fire. According to this, the second seal portion 72 deforms more easily than the first seal portion 71 due to the force acting on the first seal portion 71 and the second seal portion 72 due to the increase in the pressure of the intermediate layer IL. That is, the sealing performance of the second sealing portion 72 can be made lower than the sealing performance of the first sealing portion 71 .

・１次シール６０は、２次シール７０における第１シール部７１及び第２シール部７２に相当する構成を有してもよい。この場合、１次シール６０の第２シール部は、２次シール７０の第２シール部７２に近い位置に配置してもよいし、２次シール７０に第２シール部７２を設けなくてもよい。 - The primary seal 60 may have a configuration corresponding to the first seal portion 71 and the second seal portion 72 of the secondary seal 70 . In this case, the second seal portion of the primary seal 60 may be arranged at a position close to the second seal portion 72 of the secondary seal 70, or the second seal portion 72 may not be provided on the secondary seal 70. good.

・１次シール６０は、２次シール７０の第１シール部７１と一体に形成してもよい。この場合、１次シール６０及び２次シール７０の第１シール部７１は、同じ材質とすればよい。 - The primary seal 60 may be formed integrally with the first seal portion 71 of the secondary seal 70 . In this case, the first seal portions 71 of the primary seal 60 and the secondary seal 70 may be made of the same material.

・第２シール部７２は、２次シール７０の４つの隅部のうち、少なくとも１つの隅部に配置されていればよい。この場合、第１シール部７１は、２次シール７０から第２シール部７２を除いた部分となる。また、２次シール７０の隅部の１つを第２シール部７２とする場合、複層ガラス１０が設置される状況下において、鉛直上方に位置する隅部に第２シール部７２を配置することが好ましい。これは、鉛直上方に位置する隅部は、鉛直下方に位置する隅部よりも火災時に温度が上昇しやすく、第２シール部７２が軟化しやすいためである。 - The second seal portion 72 may be arranged in at least one of the four corners of the secondary seal 70 . In this case, the first seal portion 71 is a portion obtained by removing the second seal portion 72 from the secondary seal 70 . When one of the corners of the secondary seal 70 is used as the second seal portion 72, the second seal portion 72 is arranged at a corner portion located vertically upward under the situation where the double glazing 10 is installed. is preferred. This is because the temperature of the corner located vertically upward is more likely to rise in the event of a fire than the corner located vertically downward, and the second seal portion 72 is likely to soften.

・第２シール部７２は、２次シール７０の隅部に配置されていなくてもよい。第２シール部７２は、例えば、矩形枠状をなす２次シール７０の直線部を構成する部位に配置されてもよい。 - The second seal portion 72 does not have to be arranged at the corner of the secondary seal 70 . The second seal portion 72 may be arranged, for example, at a portion forming a linear portion of the secondary seal 70 having a rectangular frame shape.

・２次シール７０において、第１シール部７１は通気孔を有するように形成され、第２シール部７２は第１シール部７１に形成された通気孔を埋めるように配置されてもよい。この場合、第２シール部７２は、火災時に熱変形することで、第１シール部７１と第２シール部７２との間に隙間が形成される。つまり、この構成でも、上記実施形態の効果を得ることができる。 - In the secondary seal 70 , the first seal portion 71 may be formed to have a vent hole, and the second seal portion 72 may be arranged to fill the vent hole formed in the first seal portion 71 . In this case, a gap is formed between the first seal portion 71 and the second seal portion 72 by thermally deforming the second seal portion 72 in the event of a fire. That is, even with this configuration, the effects of the above embodiment can be obtained.

・第２シール部７２は、火災時に溶融することで、第１シール部７１よりも、シール性が低下する構成であってもよい。
・１次シール６０及び２次シール７０は、予め成形したシーリング材を第１ガラス板２０及び第２ガラス板３０の間に配置することで構成してもよい。この場合、１次シール６０及び２次シール７０は、第１ガラス板２０及び第２ガラス板３０に接着剤等で接着されることが好ましい。 - The second seal portion 72 may be melted in the event of a fire and may have a lower sealing performance than the first seal portion 71 .
- The primary seal 60 and the secondary seal 70 may be configured by arranging a preformed sealing material between the first glass plate 20 and the second glass plate 30 . In this case, the primary seal 60 and the secondary seal 70 are preferably adhered to the first glass plate 20 and the second glass plate 30 with an adhesive or the like.

・図４に示すように、複層ガラス１０は、変更例に係る複層ガラス１０Ｂとしてもよい。詳しくは、スペーサー４０の隅部において、内壁４３と向かい合う外壁４４に貫通孔４１を形成してもよいし、内壁４３及び外壁４４を接続する側壁４５に貫通孔４１を形成してもよい。なお、図４では、乾燥剤４２の図示を省略している。複層ガラス１０Ｂは、火災時に、中間層ＩＬで膨張した気体をスペーサー４０の貫通孔４１を介して、外部に排出しやすくできる。 - As shown in FIG. 4, the double glazing 10 may be a double glazing 10B according to a modified example. Specifically, at the corner of spacer 40 , through hole 41 may be formed in outer wall 44 facing inner wall 43 , or through hole 41 may be formed in side wall 45 connecting inner wall 43 and outer wall 44 . 4, illustration of the desiccant 42 is omitted. The multi-layer glass 10B can easily discharge the gas expanded in the intermediate layer IL to the outside through the through holes 41 of the spacer 40 in the event of a fire.

・複層ガラス１０の設置環境に応じて、第１ガラス板２０及び第２ガラス板３０の双方のガラス板をフロートガラスなどの標準的なガラス板としてもよいし、Ｌｏｗ－Ｅガラスとしてもよいし、防火ガラスとしてもよい。 ・ Depending on the installation environment of the double glazing 10, both the first glass plate 20 and the second glass plate 30 may be standard glass plates such as float glass, or may be Low-E glass. However, it can also be used as fireproof glass.

・シール５０を硬質とすることで、第１ガラス板２０及び第２ガラス板３０の間隔を一定に保てるのであれば、スペーサー４０を省いてもよい。
・第１ガラス板２０及び第２ガラス板３０の少なくとも一方のガラス板は、複数のガラス板と樹脂層とを重ね合わせた合わせガラスとしてもよい。 If the gap between the first glass plate 20 and the second glass plate 30 can be kept constant by making the seal 50 rigid, the spacer 40 may be omitted.
- At least one of the first glass plate 20 and the second glass plate 30 may be laminated glass in which a plurality of glass plates and a resin layer are laminated.

・複層ガラス１０は、３枚以上のガラス板で構成した複層ガラスとしてもよい。 - The double glazing 10 may be a double glazing composed of three or more glass plates.

１０，１０Ａ，１０Ｂ…複層ガラス、２０…第１ガラス板、２１…低放射膜、３０…第２ガラス板、４０…スペーサー、４１…貫通孔、４２…乾燥剤、４３…内壁、４４…外壁、４５…側壁、５０…シール、６０…１次シール、７０，７０Ａ…２次シール、７１，７１Ａ…第１シール部、７２，７２Ａ…第２シール部、ＩＬ…中間層。 DESCRIPTION OF SYMBOLS 10, 10A, 10B... Multi-layer glass, 20... 1st glass plate, 21... Low emissivity film, 30... 2nd glass plate, 40... Spacer, 41... Through hole, 42... Drying agent, 43... Inner wall, 44... Outer wall 45 Side wall 50 Seal 60 Primary seal 70, 70A Secondary seal 71, 71A First seal portion 72, 72A Second seal portion IL Intermediate layer.

Claims (4)

第１ガラス板と、前記第１ガラス板と間隔をおいて配置される第２ガラス板と、前記第１ガラス板及び前記第２ガラス板の間に位置する中間層を封止するように前記第１ガラス板及び前記第２ガラス板の周縁部同士を接合するシールと、を備える複層ガラスであって、
前記シールは、前記第１ガラス板及び前記第２ガラス板の周縁部に沿って配置される第１シール部及び第２シール部を有し、
前記第２シール部は、前記第１シール部よりもシール性が低く、
前記第２シール部の前記第１ガラス板及び前記第２ガラス板に対する単位面積あたりの接着力は、前記第１シール部の前記第１ガラス板及び前記第２ガラス板に対する単位面積あたりの接着力よりも小さい
複層ガラス。 a first glass plate; a second glass plate spaced from the first glass plate; and an intermediate layer positioned between the first glass plate and the second glass plate so as to seal the first glass plate. A double glazing comprising a seal that joins the peripheral edges of the glass plate and the second glass plate,
The seal has a first seal portion and a second seal portion arranged along peripheral edges of the first glass plate and the second glass plate,
The second seal portion has lower sealing performance than the first seal portion,
Adhesive force per unit area of the second seal portion to the first glass plate and the second glass plate is adhesive force per unit area of the first seal portion to the first glass plate and the second glass plate. less than
double glazing. 第１ガラス板と、前記第１ガラス板と間隔をおいて配置される第２ガラス板と、前記第１ガラス板及び前記第２ガラス板の間に位置する中間層を封止するように前記第１ガラス板及び前記第２ガラス板の周縁部同士を接合するシールと、を備える複層ガラスであって、
前記シールは、前記第１ガラス板及び前記第２ガラス板の周縁部に沿って配置される第１シール部及び第２シール部を有し、
前記第２シール部は、前記第１シール部よりもシール性が低く、
前記第１ガラス板及び前記第２ガラス板は、矩形板状をなし、
前記第２シール部は、前記第１ガラス板の隅部と前記第２ガラス板の隅部との間に配置される
複層ガラス。 a first glass plate; a second glass plate spaced from the first glass plate; and an intermediate layer positioned between the first glass plate and the second glass plate so as to seal the first glass plate. A double glazing comprising a seal that joins the peripheral edges of the glass plate and the second glass plate,
The seal has a first seal portion and a second seal portion arranged along peripheral edges of the first glass plate and the second glass plate,
The second seal portion has lower sealing performance than the first seal portion,
The first glass plate and the second glass plate have a rectangular plate shape,
The second sealing portion is arranged between a corner of the first glass plate and a corner of the second glass plate.
double glazing. 前記第２シール部は、前記第１シール部よりも、温度上昇時により軟化しやすい材質である
請求項１または２に記載の複層ガラス。 The double glazing according to claim 1 or 2 , wherein the second seal portion is made of a material that softens more easily when the temperature rises than the first seal portion. 前記第２シール部の弾性率は、前記第１シール部の弾性率よりも低い
請求項１～３の何れか一項に記載の複層ガラス。 The double glazing according to any one of claims 1 to 3 , wherein the elastic modulus of the second sealing portion is lower than the elastic modulus of the first sealing portion.
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