JP2009035444A - Windshield and interlayer for windshield - Google Patents

Windshield and interlayer for windshield Download PDF

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JP2009035444A
JP2009035444A JP2007201058A JP2007201058A JP2009035444A JP 2009035444 A JP2009035444 A JP 2009035444A JP 2007201058 A JP2007201058 A JP 2007201058A JP 2007201058 A JP2007201058 A JP 2007201058A JP 2009035444 A JP2009035444 A JP 2009035444A
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wedge
shaped
windshield
thickness
film
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Hisashi Asaoka
Yoshinobu Nakajima
Kazuo Yamada
良暢 中島
和男 山田
尚志 朝岡
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Nippon Sheet Glass Co Ltd
日本板硝子株式会社
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10036Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165Functional features of the laminated safety glass or glazing
    • B32B17/10339Specific parts of the laminated safety glass or glazing being colored or tinted
    • B32B17/10348Specific parts of the laminated safety glass or glazing being colored or tinted comprising an obscuration band
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/10559Shape of the cross-section
    • B32B17/10568Shape of the cross-section varying in thickness
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/1055Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
    • B32B17/10651Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer comprising colorants, e.g. dyes or pigments
    • B32B17/1066Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer comprising colorants, e.g. dyes or pigments imparting a tint in certain regions only, i.e. shade band

Abstract

<P>PROBLEM TO BE SOLVED: To provide a windshield which can have a reduced thickness difference in spite of its two unparallel principal planes, has an optical strain not or hardly recognizable by the driver and to provide an interlayer suitable for manufacturing such windshield. <P>SOLUTION: The interlayer 15 of the windshield 10 comprises a wedge part 151 with a thickness gradually decreasing in the direction from the upper edge side of the windshield 10 to its lower edge side and a first side part 153 which is a part on the side lower than the wedge part 151 and has a uniform thickness. The width W of the first side part 153 concerning the height direction HL of the windshield 10 is determined so that the whole of a test region B described in the annexed document of JIS R3212 may be included in that area of the windshield which coincides by the wedge part 151. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、自動車のヘッドアップディスプレイ(HUD)に好適なウインドシールドと、そのようなウインドシールドに用いられる中間膜とに関する。   The present invention relates to a windshield suitable for a head-up display (HUD) of an automobile and an intermediate film used for such a windshield.
近年、速度、エンジン回転数等の情報をウインドシールドに表示するヘッドアップディスプレイ(HUD)の需要が高まってきている。初期のHUDには、ウインドシールドに映し出される情報が二重像となる問題があった。この問題を解消または緩和するため、近年では、下記のような技術がウインドシールドに適用されている。   In recent years, there has been an increasing demand for a head-up display (HUD) that displays information such as speed and engine speed on a windshield. The early HUD had a problem that the information displayed on the windshield was a double image. In order to eliminate or alleviate this problem, in recent years, the following techniques have been applied to windshields.
1.ウインドシールドを構成する2枚のガラス板の間に挟まれる中間膜として、断面形状が楔形の中間膜を用いる技術(特許文献1)
2.均厚部と楔形部とを有する中間膜を用いる技術(特許文献1、特に図5)
3.表面形状が曲面の中間膜を用いる技術(特許文献2)
1. Technology using a wedge-shaped intermediate film as an intermediate film sandwiched between two glass plates constituting a windshield (Patent Document 1)
2. Technology using an intermediate film having a uniform thickness portion and a wedge-shaped portion (Patent Document 1, especially FIG. 5)
3. Technology using an intermediate film with a curved surface (Patent Document 2)
上記技術1によれば、ウインドシールドの2つの主面が非平行となり、ウインドシールドに映し出される情報が二重像となる度合いを軽減できる。上記技術2によれば、技術1の効果に加え、ウインドシールドの上端部の厚さと下端部の厚さとの差が過大になることを防止できる。さらに、上記技術2の中間膜によれば、全体を楔形とする中間膜に比べてロールへの巻き取りが容易になるので、中間膜の生産性が向上する。上記技術3によれば、技術1の効果に加え、ロールに中間膜を巻き取りやすくなるとともに、中間膜にシワが生じにくくなる。
特開平7−195959号公報 国際公開第99/46213号パンフレット
According to the technique 1, the two main surfaces of the windshield become non-parallel, and the degree to which the information displayed on the windshield becomes a double image can be reduced. According to the technique 2, in addition to the effect of the technique 1, it is possible to prevent the difference between the thickness of the upper end portion and the lower end portion of the windshield from becoming excessive. Furthermore, according to the intermediate film of the above technique 2, winding onto a roll is facilitated as compared with an intermediate film having a wedge shape as a whole, so that the productivity of the intermediate film is improved. According to the technique 3, in addition to the effect of the technique 1, the intermediate film can be easily wound on the roll, and the intermediate film is less likely to be wrinkled.
JP-A-7-195959 International Publication No. 99/46213 Pamphlet
しかしながら、上記技術2を適用したウインドシールドでは、中間膜の均厚部と楔形部との境界近傍において、光学的な歪を生じやすいという問題が残っている。このような光学的な歪みが運転者に視認されることは、自動車の安全上問題ないレベルであったとしても、製品価値を低下させるので好ましくない。   However, in the windshield to which the technique 2 is applied, there remains a problem that optical distortion is likely to occur in the vicinity of the boundary between the uniform thickness portion and the wedge-shaped portion of the intermediate film. It is not preferable that such an optical distortion is visually recognized by the driver because the product value is lowered even if it is at a level where there is no problem in safety of the automobile.
また、上記技術3を適用したウインドシールドでは、上端部の厚さと下端部の厚さの差が過大になるおそれがある。部品としての中間膜の膜厚差が、完成品としてのウインドシールドに反映されるからである。自動車用のウインドシールドは、JIS R3211(1998)に規定された「4.2 厚さ」の試験を満足する必要がある。ウインドシールドの厚さの測定は、通常、JIS R3212(1998)に規定された「3.2 厚さの測定」に基づいて行われる。具体的には、ウインドシールドの周縁から25mm以内の等間隔の任意の複数点における厚さを測定する。得られた全ての測定値は、ウインドシールドの呼び厚さに対して±0.4mmの範囲に収まっている必要がある。   Further, in the windshield to which the technique 3 is applied, the difference between the thickness of the upper end portion and the thickness of the lower end portion may be excessive. This is because the difference in thickness of the intermediate film as a part is reflected in the windshield as a finished product. A windshield for an automobile needs to satisfy the “4.2 thickness” test defined in JIS R3211 (1998). The measurement of the thickness of the windshield is usually performed based on “3.2 Thickness Measurement” defined in JIS R3212 (1998). Specifically, the thickness is measured at a plurality of points at equal intervals within 25 mm from the periphery of the windshield. All the measured values obtained need to be within a range of ± 0.4 mm with respect to the nominal thickness of the windshield.
二重像となる度合いを軽減する目的を達成するためには、中間膜のテーパー(楔形部の楔角)を適度に確保しなければならないが、テーパーを大きくしすぎると、厚さ試験を満足することが難しくなる。このように、二重像となる度合いを軽減することと、厚さ試験を満足することとの間には、トレードオフの関係がある。   In order to achieve the purpose of reducing the degree of double image formation, the taper of the interlayer film (the wedge angle of the wedge-shaped part) must be adequately secured. However, if the taper is too large, the thickness test is satisfied. It becomes difficult to do. Thus, there is a trade-off relationship between reducing the degree of double image formation and satisfying the thickness test.
そこで本発明は、2つの主面を非平行としながらも厚さの差を小さくでき、しかも光学的な歪が運転者に視認されない、または視認されにくいウインドシールドを提供することを目的とする。さらに本発明は、そのようなウインドシールドを製造するのに適した中間膜を提供することを目的とする。   Accordingly, an object of the present invention is to provide a windshield that can reduce the difference in thickness while making two main surfaces non-parallel, and that an optical distortion is not visually recognized by the driver or is hardly visually recognized. A further object of the present invention is to provide an intermediate film suitable for manufacturing such a windshield.
すなわち、本発明は、
互いに貼り合わされた2枚の板状体と、2枚の板状体の間に挟み込まれた中間膜とを備えたウインドシールドであって、
中間膜は、当該ウインドシールドの上辺側から下辺側に進むにつれて厚さが漸減する楔形部と、楔形部の下端部に続く第1の側部および/または楔形部の上端部に続く第2の側部とを有し、
第1の側部は、楔形部の下端部の厚さと等しい一定の厚さを有する部分、楔形部から遠ざかるにつれて厚さが漸増している部分、または、楔形部から遠ざかるにつれて楔形部よりも緩やかに厚さが減少している部分であり、
第2の側部は、楔形部の上端部の厚さと等しい一定の厚さを有する部分、楔形部から遠ざかるにつれて厚さが漸減している部分、または、楔形部から遠ざかるにつれて楔形部よりも緩やかに厚さが増加している部分であり、
JIS R3212の附属書に規定された試験領域Bの全部が楔形部によって貼り合わされた部分に含まれるように、当該ウインドシールドの高さ方向に関する第1の側部および/または第2の側部の幅が定められている、ウインドシールドを提供する。
That is, the present invention
A windshield comprising two plate-like bodies bonded together and an intermediate film sandwiched between the two plate-like bodies,
The intermediate film includes a wedge-shaped portion having a thickness that gradually decreases from the upper side to the lower side of the windshield, a first side that follows the lower end of the wedge-shaped portion, and / or a second side that continues to the upper end of the wedge-shaped portion. And have side portions,
The first side portion is a portion having a constant thickness equal to the thickness of the lower end portion of the wedge-shaped portion, a portion where the thickness gradually increases as the distance from the wedge-shaped portion, or a gentler than the wedge-shaped portion as the distance from the wedge-shaped portion increases. Where the thickness is reduced,
The second side portion is a portion having a constant thickness equal to the thickness of the upper end portion of the wedge-shaped portion, a portion having a thickness that gradually decreases as it moves away from the wedge-shaped portion, or a portion that is gentler than the wedge-shaped portion as it moves away from the wedge-shaped portion. Is the part where the thickness has increased,
The first side part and / or the second side part in the height direction of the windshield are included so that the entire test area B defined in the annex of JIS R3212 is included in the part bonded by the wedge-shaped part. Provide a windshield with a defined width.
他の側面において、本発明は、
2枚の透明な板状体に挟み込まれてそれら板状体とともにウインドシールドを構成するウインドシールド用中間膜であって、
ウインドシールドの上辺側から下辺側に進むにつれて厚さが漸減する楔形部と、楔形部の下端部に続く第1の側部および/または楔形部の上端部に続く第2の側部とを有し、
第1の側部は、楔形部の下端部の厚さと等しい一定の厚さを有する部分、楔形部から遠ざかるにつれて厚さが漸増している部分、または、楔形部から遠ざかるにつれて楔形部よりも緩やかに厚さが減少している部分であり、
第2の側部は、楔形部の上端部の厚さと等しい一定の厚さを有する部分、楔形部から遠ざかるにつれて厚さが漸減している部分、または、楔形部から遠ざかるにつれて楔形部よりも緩やかに厚さが増加している部分であり、
当該中間膜の第1主面が平坦面であると仮定した場合に、
当該中間膜の第2主面側において、楔形部と第1の側部とが第1主面に対して凹の曲面でつながっている、および/または、楔形部と第2の側部とが第1主面に対して凸の曲面でつながっている、ウインドシールド用中間膜を提供する。
In another aspect, the present invention provides:
A windshield intermediate film that is sandwiched between two transparent plates and constitutes a windshield together with the plates,
The wedge shield has a wedge-shaped portion whose thickness gradually decreases from the upper side to the lower side of the windshield, and a first side portion following the lower end portion of the wedge-shaped portion and / or a second side portion following the upper end portion of the wedge-shaped portion. And
The first side portion has a constant thickness equal to the thickness of the lower end portion of the wedge-shaped portion, a portion where the thickness gradually increases as it moves away from the wedge-shaped portion, or a gentler portion than the wedge-shaped portion as it moves away from the wedge-shaped portion. Where the thickness is reduced,
The second side portion has a constant thickness equal to the thickness of the upper end portion of the wedge-shaped portion, a portion whose thickness gradually decreases as it moves away from the wedge-shaped portion, or a gentler portion than the wedge-shaped portion as it moves away from the wedge-shaped portion. Is the part where the thickness has increased,
When it is assumed that the first main surface of the intermediate film is a flat surface,
On the second main surface side of the intermediate film, the wedge-shaped portion and the first side portion are connected to the first main surface by a concave curved surface, and / or the wedge-shaped portion and the second side portion are Provided is a windshield intermediate film connected to a first main surface by a convex curved surface.
さらに、他の側面において、本発明は、
2枚の透明な板状体に挟み込まれてそれら板状体とともにウインドシールドを構成するウインドシールド用中間膜であって、
ウインドシールドの上辺側から下辺側に進むにつれて厚さが漸減する楔形部と、楔形部の下端部に続く第1の側部とを備え、
第1の側部は、楔形部の下端部の厚さと等しい一定の厚さを有する部分、楔形部から遠ざかるにつれて厚さが漸増している部分、または、楔形部から遠ざかるにつれて楔形部よりも緩やかに厚さが減少している部分であり、
ウインドシールドの高さ方向に関する第1の側部の幅が30mm以上170mm以下の範囲にある、ウインドシールド用中間膜を提供する。
Furthermore, in another aspect, the present invention provides:
A windshield intermediate film that is sandwiched between two transparent plates and constitutes a windshield together with the plates,
A wedge-shaped portion having a thickness that gradually decreases from the upper side to the lower side of the windshield, and a first side that follows the lower end of the wedge-shaped portion,
The first side portion is a portion having a constant thickness equal to the thickness of the lower end portion of the wedge-shaped portion, a portion where the thickness gradually increases as the distance from the wedge-shaped portion, or a gentler than the wedge-shaped portion as the distance from the wedge-shaped portion increases. Where the thickness is reduced,
Provided is an intermediate film for windshield in which the width of the first side portion in the height direction of the windshield is in the range of 30 mm to 170 mm.
上記本発明のウインドシールドによれば、上辺側から下辺側に進むにつれて厚さが漸減する楔形部を有した中間膜が用いられているので、ウインドシールドの2つの主面が非平行となる。これにより、HUDシステムの要素としてウインドシールドを用いた場合に、ウインドシールドに映し出される情報が二重像となる度合いを軽減できる。また、JIS R3212の附属書に規定された試験領域Bの全部が楔形部によって貼り合わされた部分に含まれるように、第1の側部および/または第2の側部の幅が定められている。そのため、中間膜の厚さの変化に基づく光学的な歪みが、運転者の前方視野を確保する上で重要な領域である試験領域Bに生じにくい。   According to the windshield of the present invention, since the intermediate film having the wedge-shaped portion whose thickness gradually decreases from the upper side to the lower side is used, the two main surfaces of the windshield become non-parallel. Thereby, when the windshield is used as an element of the HUD system, it is possible to reduce the degree that the information displayed on the windshield becomes a double image. In addition, the width of the first side portion and / or the second side portion is determined so that the entire test region B defined in the annex of JIS R3212 is included in the portion bonded by the wedge-shaped portion. . Therefore, optical distortion based on the change in the thickness of the intermediate film is unlikely to occur in the test area B, which is an important area for securing the driver's front vision.
また、本発明のウインドシールドに用いられている中間膜は、第1の側部および第2の側部から選ばれる少なくとも1つを備えている。第1の側部は、楔形部の下端部の厚さと等しい一定の厚さを有する部分、楔形部から遠ざかるにつれて厚さが漸増している部分、または、楔形部から遠ざかるにつれて楔形部よりも緩やかに厚さが減少している部分である。第2の側部は、楔形部の上端部の厚さと等しい一定の厚さを有する部分、楔形部から遠ざかるにつれて厚さが漸減している部分、または、楔形部から遠ざかるにつれて楔形部よりも緩やかに厚さが増加している部分である。したがって、本発明によれば、楔形部のみで構成された中間膜が用いられた従来のウインドシールドよりも、上端部の厚さと下端部の厚さとの差を縮小することができる。   Further, the intermediate film used in the windshield of the present invention includes at least one selected from the first side and the second side. The first side portion has a constant thickness equal to the thickness of the lower end portion of the wedge-shaped portion, a portion where the thickness gradually increases as it moves away from the wedge-shaped portion, or a gentler portion than the wedge-shaped portion as it moves away from the wedge-shaped portion. This is the part where the thickness is reduced. The second side portion has a constant thickness equal to the thickness of the upper end portion of the wedge-shaped portion, a portion whose thickness gradually decreases as it moves away from the wedge-shaped portion, or a gentler portion than the wedge-shaped portion as it moves away from the wedge-shaped portion. This is the part where the thickness increases. Therefore, according to the present invention, the difference between the thickness of the upper end portion and the thickness of the lower end portion can be reduced as compared with the conventional windshield using the intermediate film composed only of the wedge-shaped portion.
次に、上記本発明のウインドシールド用中間膜の前者によれば、ウインドシールドの上辺側から下辺側に進むにつれて厚さが漸減する楔形部を有しているので、当該中間膜を用いて製造されたウインドシールドの2つの主面が非平行となる。これにより、HUDシステムの要素としてウインドシールドを用いた場合に、ウインドシールドに映し出される情報が二重像となる度合いを軽減できる。   Next, according to the former of the windshield intermediate film of the present invention, since it has a wedge-shaped portion whose thickness gradually decreases from the upper side to the lower side of the windshield, it is manufactured using the intermediate film. The two main surfaces of the windshield made non-parallel. Thereby, when the windshield is used as an element of the HUD system, it is possible to reduce the degree that the information displayed on the windshield becomes a double image.
また、本発明の中間膜は、第1の側部および第2の側部から選ばれる少なくとも1つを備えている。このような中間膜を用いてウインドシールドを製造すれば、二重像となる度合いを十分に軽減しつつ、ウインドシールドの上端部の厚さと下端部の厚さとの差をより小さくすることが可能となる。さらに、楔形部と第1の側部とが曲面で滑らかにつながっているため、本発明の中間膜を用いて製造されたウインドシールドには、楔形部と第1の側部との境界近傍に光学的な歪みが生じにくい。このような有意な効果は、第1の側部に代えて第2の側部を有する場合、さらには第1の側部とともに第2の側部を有する場合にも得られる。   Further, the intermediate film of the present invention includes at least one selected from the first side portion and the second side portion. If a windshield is manufactured using such an intermediate film, the difference between the thickness of the upper end and the lower end of the windshield can be reduced while sufficiently reducing the degree of double image formation. It becomes. Further, since the wedge-shaped portion and the first side portion are smoothly connected with a curved surface, the windshield manufactured using the intermediate film of the present invention is located near the boundary between the wedge-shaped portion and the first side portion. Optical distortion is less likely to occur. Such a significant effect can be obtained when the second side portion is provided instead of the first side portion, and also when the second side portion is provided together with the first side portion.
次に、上記本発明のウインドシールド用中間膜の後者によれば、厚さが漸減する楔形部を有しているので、当該中間膜を用いて製造されたウインドシールドの2つの主面が非平行となる。これにより、HUDシステムの要素としてウインドシールドを用いた場合に、ウインドシールドに映し出される情報が二重像となる度合いを軽減できる。また、楔形部に続く第1の側部の幅を30mm以上170mm以下の範囲に制限している。そのため、楔形部と第1の側部との境界をJIS R3212の附属書に規定された試験領域Bの外に位置させることができる。また、その境界を、ウインドシールドに通常設けられる遮蔽層で隠すことも可能である。楔形部と第1の側部との境界が試験領域Bの外に位置する場合、楔形部と第1の側部との境界近傍に光学的な歪みが生じたとしても、そのような歪みは運転者に視認されない、または視認されにくい。   Next, according to the latter of the intermediate film for windshields of the present invention, since the wedge-shaped portion having a gradually decreasing thickness is provided, the two main surfaces of the windshield manufactured using the intermediate film are not Parallel. Thereby, when the windshield is used as an element of the HUD system, it is possible to reduce the degree that the information displayed on the windshield becomes a double image. Further, the width of the first side portion following the wedge-shaped portion is limited to a range of 30 mm to 170 mm. Therefore, the boundary between the wedge-shaped portion and the first side portion can be positioned outside the test area B defined in the annex of JIS R3212. It is also possible to hide the boundary with a shielding layer usually provided on the windshield. When the boundary between the wedge-shaped part and the first side part is located outside the test area B, even if optical distortion occurs near the boundary between the wedge-shaped part and the first side part, such distortion is Not visible to the driver or difficult to see.
また、楔形部に続く第1の側部は、楔形部の下端部の厚さと等しい一定の厚さを有する部分、楔形部から遠ざかるにつれて厚さが漸増している部分、または、楔形部から遠ざかるにつれて楔形部よりも緩やかに厚さが減少している部分である。したがって、楔形部の楔角を比較的大きくした場合であっても、ウインドシールドの上端部の厚さと下端部の厚さとの差が過大となりにくい。このような有意な効果は、第1の側部に代えて第2の側部を有する場合、さらには第1の側部とともに第2の側部を有する場合にも得られる。   Further, the first side portion following the wedge-shaped portion is a portion having a constant thickness equal to the thickness of the lower end portion of the wedge-shaped portion, a portion where the thickness is gradually increased as the distance from the wedge-shaped portion is increased, or the first side portion is moved away from the wedge-shaped portion. Accordingly, the thickness gradually decreases as compared with the wedge-shaped portion. Therefore, even when the wedge angle of the wedge-shaped portion is relatively large, the difference between the thickness of the upper end portion and the lower end portion of the windshield is unlikely to be excessive. Such a significant effect can be obtained when the second side portion is provided instead of the first side portion, and also when the second side portion is provided together with the first side portion.
以下、添付の図面を参照しつつ本発明の実施形態を説明する。添付の図面は、発明の理解を容易にするために、特徴部分が誇張された模式図であることを断っておく。   Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In order to facilitate the understanding of the invention, the accompanying drawings should be noted that the features are exaggerated schematic views.
(第1実施形態)
図1は、本実施形態にかかるウインドシールドの平面図である。図2は、図1に示すウインドシールドの破線Aで囲んだ領域のII-II断面図である。図3は、図1に示すウインドシールドに用いられた中間膜の断面図である。ただし、図3の断面図は、平坦な支持面上に中間膜を置いた状態での断面図である。
(First embodiment)
FIG. 1 is a plan view of a windshield according to the present embodiment. 2 is a cross-sectional view taken along the line II-II in a region surrounded by a broken line A of the windshield shown in FIG. FIG. 3 is a cross-sectional view of the intermediate film used in the windshield shown in FIG. However, the cross-sectional view of FIG. 3 is a cross-sectional view in a state where an intermediate film is placed on a flat support surface.
図1および図2に示すように、ウインドシールド10は、いわゆる合わせガラスによって構成されており、曲げ成形された第1ガラス板11と、第1ガラス板11と同一形状に曲げ成形されてこれと貼り合わされた第2ガラス板13と、第1ガラス板11と第2ガラス板13との間に介在して両者を接着する中間膜15とを備えている。本実施形態では、第1ガラス板11が車内側の内板であり、第2ガラス板13が車外側の外板である。第1ガラス板11の周辺部の凹面11p(中間膜15に接する側とは反対側の主面)には、暗色のマスキング12が枠状の形態で設けられている。なお、マスキング12は、2枚のガラス板11,13から選ばれる少なくとも1つのガラス板の周辺部に設けられているとよい。   As shown in FIGS. 1 and 2, the windshield 10 is made of so-called laminated glass, and is bent and formed into the same shape as the first glass plate 11 and the first glass plate 11. The second glass plate 13 and the intermediate film 15 that are interposed between the first glass plate 11 and the second glass plate 13 are provided. In the present embodiment, the first glass plate 11 is an inner plate inside the vehicle, and the second glass plate 13 is an outer plate outside the vehicle. On the concave surface 11p (the main surface opposite to the side in contact with the intermediate film 15) at the periphery of the first glass plate 11, a dark masking 12 is provided in a frame shape. Note that the masking 12 may be provided in the periphery of at least one glass plate selected from the two glass plates 11 and 13.
第1ガラス板11および第2ガラス板13は、いずれも、自動車のウインドシールド10に好適に用いられるソーダライムガラスによって構成されている。各ガラス板11,13の組成は同一であってもよいし、異なっていてもよい。第1ガラス板11と第2ガラス板13は、同一の形状および同一の厚さを有している。もちろん、第1ガラス板11の厚さと第2ガラス板13の厚さが異なっていてもよい。ウインドシールド10に用いられる各ガラス板11,13の厚さは、例えば、1.5〜2.4mmの範囲にある。   Both the first glass plate 11 and the second glass plate 13 are made of soda lime glass that is preferably used for the windshield 10 of an automobile. The composition of each glass plate 11 and 13 may be the same or different. The first glass plate 11 and the second glass plate 13 have the same shape and the same thickness. Of course, the thickness of the first glass plate 11 and the thickness of the second glass plate 13 may be different. The thickness of each glass plate 11 and 13 used for the windshield 10 exists in the range of 1.5-2.4 mm, for example.
遮蔽層としてのマスキング12は、しばしば、セラミックプリントと呼ばれる。第1ガラス板11の周辺部にセラミックペーストを印刷し、印刷したセラミックペーストを焼成することにより、マスキング12を形成することができる。マスキング形成用のセラミックペーストは、黒色系や暗褐色系の無機顔料と、ガラスフリットと、バインダや溶剤との混合物でありうる。セラミックペーストの焼成は、ガラス板11,13の曲げ成形時の加熱によって同時に進めることができる。   Masking 12 as a shielding layer is often referred to as a ceramic print. The masking 12 can be formed by printing a ceramic paste around the first glass plate 11 and firing the printed ceramic paste. The ceramic paste for masking formation may be a mixture of a black or dark brown inorganic pigment, glass frit, a binder or a solvent. The firing of the ceramic paste can proceed simultaneously by heating during bending of the glass plates 11 and 13.
ウインドシールド10の外周縁からのマスキング12の幅は、例えば、20〜170mmの範囲にある。さらに、本実施形態において、マスキング12の幅は、ウインドシールド10の上辺10t側と下辺10b側とで相違している。具体的には、上辺10t側よりも下辺10b側が広くなるようにマスキング12の幅調整が行われている。下辺10b側におけるマスキング12の幅H2は、例えば、80〜170mmの範囲にある。上辺10t側におけるマスキング12の幅H3は、例えば、20〜70mmの範囲にある。 The width of the masking 12 from the outer peripheral edge of the windshield 10 is in the range of 20 to 170 mm, for example. Further, in the present embodiment, the width of the masking 12 is different between the upper side 10 t side and the lower side 10 b side of the windshield 10. Specifically, the width of the masking 12 is adjusted so that the lower side 10b side is wider than the upper side 10t side. The width H 2 of the masking 12 on the lower side 10b side is, for example, in the range of 80 to 170 mm. The width H 3 of the masking 12 on the upper side 10t side is, for example, in the range of 20 to 70 mm.
ウインドシールド10の下辺10b側には、しばしば、電熱線やデアイサーが設けられる。これらの部品を確実に遮蔽し、ウインドシールド10の美観を高めるために、幅広のマスキング12を形成するとよい。ウインドシールド10の下辺10b側は、自動車のダッシュボードやインパネに隠れる領域が広い。そのため、マスキング12の幅を多少広くしたとしても、ウインドシールド10の視界が狭くなるおそれは小さい。なお、ウインドシールド10の高さH1は、例えば、700〜1200mmの範囲にある。 On the lower side 10b side of the windshield 10, a heating wire or a de-icer is often provided. In order to reliably shield these components and enhance the aesthetics of the windshield 10, a wide masking 12 may be formed. The lower side 10b side of the windshield 10 has a wide area hidden in the dashboard or instrument panel of the automobile. For this reason, even if the width of the masking 12 is somewhat widened, there is little possibility that the field of view of the windshield 10 will be narrowed. The height H 1 of the windshield 10 is in the range of 700 to 1200 mm, for example.
図1に示すように、マスキング12は、試験領域Bの外側に設けられている。試験領域Bは、ウインドシールドの光学的特性を測定するべき領域として、JIS R3212(1998)の附属書に規定されている。具体的に、試験領域Bは、以下のように定義されている。   As shown in FIG. 1, the masking 12 is provided outside the test region B. The test area B is defined in the annex of JIS R3212 (1998) as an area for measuring the optical characteristics of the windshield. Specifically, the test area B is defined as follows.
まず、3次元直交座標上に自動車の位置が定められる。試験領域Bは、V点から−X方向に広がる下記(a)〜(d)の4平面によって囲まれるウインドシールドの外側表面の領域として定義される。ただし、ウインドシールド周縁から25mm以下および周辺部にマスキングがある場合、そのマスキングの内側の線から25mmを除外する。言い換えれば、試験領域Bは、その全部が枠状のマスキングの内側に位置する。
(a)V1を通りY軸に平行で、X軸に対し+Z方向に7°傾斜した面。
(b)V2を通りY軸に平行で、X軸に対し−Z方向に5°傾斜した面。
(c)V1,V2を通りX軸の+Y方向に17°の角度を持つ垂直面。
(d)車両の中心面に対して、上記(c)面と対称な垂直面。
First, the position of the automobile is determined on three-dimensional orthogonal coordinates. The test region B is defined as a region of the outer surface of the windshield surrounded by the following four planes (a) to (d) extending from the V point in the −X direction. However, if there is masking 25 mm or less from the periphery of the windshield and the peripheral part, 25 mm is excluded from the line inside the masking. In other words, the test area B is entirely located inside the frame-shaped masking.
(A) A surface that passes through V 1 and is parallel to the Y-axis and inclined by 7 ° in the + Z direction with respect to the X-axis.
(B) A surface that passes through V 2 and is parallel to the Y-axis and inclined by 5 ° in the −Z direction with respect to the X-axis.
(C) A vertical plane passing through V 1 and V 2 and having an angle of 17 ° in the + Y direction of the X axis.
(D) A vertical plane symmetrical to the plane (c) with respect to the center plane of the vehicle.
なお、JIS R3212(1998)の附属書における用語の定義は、以下の通りである。   In addition, the definition of the term in the annex of JIS R3212 (1998) is as follows.
・R点(シーティングリファレンス点):R点は、座席(前後に調節できるものは最後端位置、上下に調節できるものは最低の位置、シートバック角度およびシートクッションの取付角度が調節できるものは、設計標準角度に調節した状態とする)にISO 6549(1980)に規定された人体模型を着座させた場合のH点(当該模型の股関節点)の位置またはこれに相当する設計標準位置とする。 ・ R point (seat reference point): R point is the seat (the one that can be adjusted back and forth is the rearmost position, the one that can be adjusted up and down is the lowest position, the one that can adjust the seat back angle and seat cushion mounting angle, It is set as the position of the point H (the hip joint point of the model) or the design standard position corresponding to this when the human body model defined in ISO 6549 (1980) is seated in the state adjusted to the design standard angle.
・車両中心線:自動車を平坦な面に置いたときの次に示す直線とする。(1)四輪以上の自動車では、左右の前車輪および後車輪のそれぞれの設計中心点を結ぶ線分の中心を通る直線。(2)三輪自動車(前1輪)では、左右の後車輪の設計中心点を結ぶ線分の中点と前輪の設計中心点を通る直線(後1輪もこれに準じる)。(3)キャタピラをもつ自動車では、左右のキャタピラの中心線から等距離にある直線。 -Vehicle center line: The straight line shown below when the car is placed on a flat surface. (1) In an automobile with four or more wheels, a straight line passing through the center of a line segment connecting the design center points of the left and right front wheels and the rear wheels. (2) In a three-wheeled vehicle (one front wheel), a straight line passing through the midpoint of the line connecting the design center points of the left and right rear wheels and the design center point of the front wheels (the same applies to the rear wheel). (3) For cars with caterpillar, straight lines that are equidistant from the center line of the left and right caterpillars.
・車両中心面(S1):車両中心線を含む垂直面。
・X軸:R点を通る水平面で、R点を通り車両中心線と平行(長さ方向)の軸。
+X:自動車の後方向、−X:自動車の前方向
・Y軸:R点を通る水平面で、X軸と直交する軸。
+Y:自動車の進行右方向、−Y方向:自動車の進行左方向
・Z軸:R点を通る垂直面で、X軸およびY軸に直交する軸。
+Z:自動車の上方向、−Z方向:自動車の下方向
Vehicle center plane (S 1 ): vertical plane including the vehicle center line.
X axis: A horizontal plane passing through point R, passing through point R and parallel to the vehicle center line (length direction).
+ X: Rear direction of automobile, -X: Front direction of automobile, Y axis: A horizontal plane passing through point R and orthogonal to the X axis.
+ Y: Right direction of travel of the car, -Y direction: Left direction of travel of the car. Z axis: A vertical plane passing through the R point and perpendicular to the X axis and the Y axis.
+ Z: upward direction of automobile, -Z direction: downward direction of automobile
・R点を原点としたV1点:R点から+X方向に68mm、+Y方向に5mm、+Z方向に665mm進んだ点。
・R点を原点としたV2点:R点から+X方向に68mm、+Y方向に5mm、+Z方向に589mm進んだ点。
ただし、これらのV点は、M1カテゴリの自動車に適用する。M1カテゴリの自動車とは、常用定員10人以下の乗用の用に供する自動車で、四輪以上のものまたは自動車総重量が1トンを超える三輪のものをいう。
V 1 point with R point as the origin: A point advanced 68 mm in the + X direction, 5 mm in the + Y direction, and 665 mm in the + Z direction from the R point.
V 2 point with R point as the origin: A point advanced 68 mm in the + X direction, 5 mm in the + Y direction, and 589 mm in the + Z direction from the R point.
However, these V point is applied to an automobile of M 1 category. The M 1 category of motor vehicles, a car to be subjected to the use of conventional capacity of 10 or fewer passenger, refers to the three-wheeled that thing or automotive gross weight of more than four wheels is more than one ton.
中間膜15は、ポリビニルブチラール(PVB)、エチレンビニルアセタール(EVA)、ポリウレタン、エチレン−酢酸ビニル共重合体、塩化ビニル等の透明な熱可塑性樹脂によって構成することができる。通常は、耐貫通性に優れるPVBが使用される。さらに、複数層を含む中間膜、例えば、2層のPVB膜と、2層のPVB膜の間に挟まれた1層のEVA膜とを有する樹脂膜を、ウインドシールド10の中間膜15として好適に採用できる。   The intermediate film 15 can be made of a transparent thermoplastic resin such as polyvinyl butyral (PVB), ethylene vinyl acetal (EVA), polyurethane, ethylene-vinyl acetate copolymer, vinyl chloride or the like. Usually, PVB having excellent penetration resistance is used. Further, an intermediate film including a plurality of layers, for example, a resin film having a two-layer PVB film and a one-layer EVA film sandwiched between the two PVB films is suitable as the intermediate film 15 of the windshield 10. Can be adopted.
図3に示すように、中間膜15は、楔形部151と第1の側部153とによって構成されている。楔形部151は、ウインドシールド10の高さ方向HLに関する上辺側から下辺側に進むにつれて厚さが漸減する部分である。第1の側部153は、楔形部151の下端部(薄肉端)に続く部分であって、楔形部151の下端部の厚さと等しい一定の厚さd1を有する部分である。中間膜15は、第1主面15p(裏面)が凹凸のない平坦面となるように成形されていてもよい。第1主面15pを平坦面とした場合に、中間膜15の第2主面(表面)は、第1主面15pに対して傾斜した第1領域151kと、第1主面15pと平行な第2領域153kとを含む。第1領域151kは、楔形部151における中間膜15の第2主面151kであり、第1主面15pに対して傾いている。以下、この傾きを「楔角」という。第2領域153kは、第1の側部153における中間膜15の第2主面153kである。 As shown in FIG. 3, the intermediate film 15 includes a wedge-shaped portion 151 and a first side portion 153. The wedge-shaped portion 151 is a portion where the thickness gradually decreases from the upper side toward the lower side with respect to the height direction HL of the windshield 10. First side 153 is a portion that follows the lower end of the wedge portion 151 (thin end), a portion having a constant thickness d 1 the thickness of the lower portion and equal to the wedge part 151. The intermediate film 15 may be formed such that the first main surface 15p (back surface) is a flat surface without unevenness. When the first main surface 15p is a flat surface, the second main surface (surface) of the intermediate film 15 is parallel to the first region 151k inclined with respect to the first main surface 15p and the first main surface 15p. Second region 153k. The first region 151k is the second main surface 151k of the intermediate film 15 in the wedge-shaped portion 151, and is inclined with respect to the first main surface 15p. Hereinafter, this inclination is referred to as “wedge angle”. The second region 153k is the second main surface 153k of the intermediate film 15 in the first side portion 153.
なお、中間膜15は、第1主面15pが平坦面とならないように成形されていてもよい。第1主面15pが平坦面でない場合、第1主面15pが凹凸のない平坦面となるように中間膜15を変形させた状態において、第2主面の形状を考えればよい。この点については、他の実施形態も同様である。   The intermediate film 15 may be formed so that the first main surface 15p does not become a flat surface. When the first main surface 15p is not a flat surface, the shape of the second main surface may be considered in a state where the intermediate film 15 is deformed so that the first main surface 15p is a flat surface without unevenness. This is the same for the other embodiments.
図2に示すように、楔形部151によれば、ウインドシールド10の2つの主面11p,13pが僅かに非平行となる。すると、HUDシステムにウインドシールド10を用いた場合に、ウインドシールド10に映し出される情報が二重像となる度合いを軽減できる。また、厚さが一定の第1の側部153によれば、楔形部151の楔角を比較的大きくした場合であっても、ウインドシールド10の上端部の厚さと下端部の厚さとの差が過大となることを防止できる。   As shown in FIG. 2, according to the wedge-shaped portion 151, the two main surfaces 11p and 13p of the windshield 10 are slightly non-parallel. Then, when the windshield 10 is used in the HUD system, it is possible to reduce the degree to which the information displayed on the windshield 10 becomes a double image. Further, according to the first side portion 153 having a constant thickness, even when the wedge angle of the wedge-shaped portion 151 is relatively large, the difference between the thickness of the upper end portion and the lower end portion of the windshield 10 is different. Can be prevented from becoming excessive.
図3に示す中間膜15において、楔形部151の厚さの変化率は一定である。すなわち、楔形部151は一定の楔角を有している。ただし、楔形部151の厚さの変化率は一定でなくてもよい。例えば、ウインドシールド10の厚さ方向TL(中間膜15の厚さ方向)および高さ方向HLに平行な断面において、第1主面15pが直線、第2主面151kが曲線を示すように、楔形部151の形状が定められていてもよい。また、楔形部151の厚さの変化率は、高さ方向HLに関する中間膜15の長さ1mあたりで0.1〜1.0mmの範囲とすることができる。このような変化率が得られるように楔形部151の形状および寸法を定めることにより、ウインドシールド10に映し出される情報が二重像となる度合いを十分に軽減することが可能となる。   In the intermediate film 15 shown in FIG. 3, the change rate of the thickness of the wedge-shaped portion 151 is constant. That is, the wedge-shaped portion 151 has a certain wedge angle. However, the rate of change of the thickness of the wedge-shaped portion 151 may not be constant. For example, in a cross section parallel to the thickness direction TL of the windshield 10 (thickness direction of the intermediate film 15) and the height direction HL, the first main surface 15p is a straight line, and the second main surface 151k is a curve. The shape of the wedge-shaped portion 151 may be determined. Moreover, the rate of change of the thickness of the wedge-shaped portion 151 can be in the range of 0.1 to 1.0 mm per 1 m of the length of the intermediate film 15 in the height direction HL. By determining the shape and dimensions of the wedge-shaped portion 151 so that such a rate of change can be obtained, it is possible to sufficiently reduce the degree to which the information displayed on the windshield 10 becomes a double image.
なお、中間膜15の第1主面15pは、中間膜15単独の状態では平坦面でありうるが、中間膜15がウインドシールド10の一部となった状態ではガラス板11,13の曲げ形状に沿った曲面となることを断っておく。   The first main surface 15p of the intermediate film 15 may be a flat surface when the intermediate film 15 is alone, but the bent shape of the glass plates 11 and 13 when the intermediate film 15 is a part of the windshield 10. I refuse to be a curved surface along.
第1の側部153の厚さd1は、ウインドシールド10がJIS R3211(1998)に規定された「4.4 耐衝撃性」、「4.5 耐貫通性」および「4.6 ヘッドフォーム」の各試験、並びに諸外国において規定された、これらに対応する試験を満足できるように、例えば0.5〜1.5mmの範囲内で調整することができる。具体的には、第1の側部153の厚さd1を約0.76mmとすることができる。第1の側部153の厚さd1をこのような値に調整することにより、中間膜15の厚さが過大となることを防止できるとともに、軽量化やコスト抑制の面でも有利である。また、膜厚の変化に起因する光学的な歪やウインドシールド10の板ズレも発生しにくくなる。 The thickness d 1 of the first side portion 153 is determined according to “4.4 impact resistance”, “4.5 penetration resistance” and “4.6 headform” defined in JIS R3211 (1998). In order to satisfy the respective tests of "" and the tests corresponding to these specified in other countries, it can be adjusted within a range of 0.5 to 1.5 mm, for example. Specifically, the thickness d 1 of the first side portion 153 can be about 0.76 mm. By adjusting the thickness d 1 of the first side portion 153 to such a value, it is possible to prevent the intermediate film 15 from becoming excessively thick, and it is advantageous in terms of weight reduction and cost reduction. Further, optical distortion due to the change in film thickness and plate displacement of the windshield 10 are less likely to occur.
図3に示すように、高さ方向HLに関する中間膜15の一端部(上端部)の厚さD1と、他端部(下端部)の厚さd1とは異なっている。本実施形態では、楔形部151の上端部の厚さD1が中間膜15の上端部の厚さD1であり、第1の側部153の厚さd1が中間膜15の下端部の厚さd1となっている。楔形部151の上端部の厚さD1と第1の側部153の厚さd1との差は、0.05mm以上0.8mm以下(より好ましくは0.05mm以上0.6mm以下)の範囲に収まっているとよい。中間膜15の上端部と下端部との膜厚差をこのような範囲内とすることにより、ウインドシールド10の上端部の厚さと下端部の厚さとの差を小さく抑えることができる。すなわち、ウインドシールド10の上端部の厚さと下端部の厚さとの差を0.05mm以上0.8mm以下の範囲に収めることができる。 As shown in FIG. 3, the thickness D 1 at one end (upper end) of the intermediate film 15 in the height direction HL is different from the thickness d 1 at the other end (lower end). In the present embodiment, the thickness D 1 of the upper end portion of the wedge part 151 is thick D 1 of the upper end portion of the intermediate layer 15, the thickness d 1 of the first side 153 of the lower end portion of the intermediate layer 15 The thickness is d 1 . The difference between the thickness D 1 of the upper end portion of the wedge-shaped portion 151 and the thickness d 1 of the first side portion 153 is 0.05 mm or more and 0.8 mm or less (more preferably 0.05 mm or more and 0.6 mm or less). It should be within the range. By making the film thickness difference between the upper end portion and the lower end portion of the intermediate film 15 within such a range, the difference between the thickness of the upper end portion and the lower end portion of the windshield 10 can be kept small. That is, the difference between the thickness of the upper end portion and the lower end portion of the windshield 10 can be within a range of 0.05 mm or more and 0.8 mm or less.
図1に示すように、本実施形態によれば、試験領域Bの全部が楔形部151によって貼り合わされた部分に含まれるように、ウインドシールド10の高さ方向HLに関する第1の側部153の幅Wが定められている。このようにすれば、中間膜15の変化に起因する光学的な歪みが運転者によって視認されにくくなり、自動車の安全運転の観点から好ましい。楔形部151と第1の側部153との境界BL1は、試験領域Bの外周縁とウインドシールド10の外周縁との間に位置している。 As shown in FIG. 1, according to the present embodiment, the first side portion 153 with respect to the height direction HL of the windshield 10 is included so that the entire test region B is included in the portion bonded by the wedge-shaped portion 151. A width W is defined. In this way, the optical distortion caused by the change in the intermediate film 15 is less likely to be visually recognized by the driver, which is preferable from the viewpoint of safe driving of the automobile. A boundary BL 1 between the wedge-shaped portion 151 and the first side portion 153 is located between the outer peripheral edge of the test region B and the outer peripheral edge of the windshield 10.
さらに、本実施形態によれば、図2に示すように、楔形部151と第1の側部153との境界BL1は、ウインドシールド10の厚さ方向に関してマスキング12と重なっている。すなわち、境界BL1がマスキング12に重なるように、中間膜15の第1の側部153の幅Wが定められている。楔形部151と第1の側部153との境界BL1の近傍は、中間膜15の厚さの変化による光学的な歪が発生しやすい領域である。したがって、このような領域をマスキング12で隠すことにより、運転者の目に歪みが映ることを確実に防止できる。 Furthermore, according to this embodiment, as shown in FIG. 2, the boundary BL 1 between the wedge-shaped portion 151 and the first side portion 153 overlaps the masking 12 in the thickness direction of the windshield 10. That is, the width W of the first side portion 153 of the intermediate film 15 is determined so that the boundary BL 1 overlaps the masking 12. Near the boundary BL 1 of the wedge portion 151 and the first side 153 is an optical distortion due to changes in the thickness easily occurs area of the intermediate layer 15. Therefore, by hiding such a region with the masking 12, it is possible to reliably prevent the driver from seeing distortion.
なお、楔形部151と第1の側部153との境界BL1がマスキング12と重なるという構成を採用すれば、楔形部151によって貼り合わされた部分に試験領域Bの全部が含まれるという構成を必ず採用することになる。 Note that if the configuration in which the boundary BL 1 between the wedge-shaped portion 151 and the first side portion 153 overlaps the masking 12 is adopted, the configuration in which the entire test region B is included in the portion bonded by the wedge-shaped portion 151 is sure. Will be adopted.
前述したように、ウインドシールド10の下辺10b側において、マスキング12はウインドシールド10の外周縁から80〜170mmの範囲で形成されうる。この場合、ウインドシールド10の高さ方向HLに関する第1の側部153の幅Wを170mm以下に制限すればよい。このようにすれば、楔形部151と第1の側部153との境界BL1がマスキング12に重なり、境界BL1の近傍に光学的な歪みが生じた場合であっても、歪みが運転者に視認されなくなる。特に、ウインドシールド10の下辺10b側は、上辺10t側に比べてマスキング12の幅を広く確保することができるので、中間膜15の第1の側部153を下辺10b側に位置させることにより、大幅な設計変更を要することなく、上記境界BL1をマスキング12に重ねることが可能である。 As described above, on the lower side 10 b side of the windshield 10, the masking 12 can be formed within a range of 80 to 170 mm from the outer peripheral edge of the windshield 10. In this case, the width W of the first side portion 153 in the height direction HL of the windshield 10 may be limited to 170 mm or less. In this way, even if the boundary BL 1 between the wedge-shaped portion 151 and the first side portion 153 overlaps the masking 12 and optical distortion occurs in the vicinity of the boundary BL 1 , the distortion is not generated by the driver. Will not be visible. In particular, since the lower side 10b side of the windshield 10 can secure a wider width of the masking 12 than the upper side 10t side, by positioning the first side portion 153 of the intermediate film 15 on the lower side 10b side, The boundary BL 1 can be overlaid on the masking 12 without requiring a significant design change.
また、厚さが一定である第1の側部153の幅Wを30mm以上確保すると、上端部から下端部にわたる全体が楔形状の従来の中間膜に比べ、膜厚差を小さくできる。二重像を改善するために十分な楔角が確保され、かつ膜厚差(D1−d1)が小さく抑えられた中間膜15により、ウインドシールド10の上端部の厚さと下端部の厚さとの差が過大となることを防止できる。なお、第1の側部153の幅Wは、30〜160mmの範囲であってもよい。 Further, if the width W of the first side portion 153 having a constant thickness is secured to 30 mm or more, the film thickness difference can be reduced as compared with the conventional wedge-shaped intermediate film that extends from the upper end to the lower end. The thickness of the upper end portion and the lower end portion of the windshield 10 is reduced by the intermediate film 15 in which a sufficient wedge angle is secured to improve the double image and the difference in film thickness (D 1 -d 1 ) is kept small. It is possible to prevent an excessive difference from the above. The width W of the first side portion 153 may be in the range of 30 to 160 mm.
一般に、マスキング12を設ける目的は、ウインドシールド10を自動車のボディに固定する接着剤の日射による劣化を防止することや、電熱線の端子やデアイサーを遮蔽して美観を高めることにある。こうした目的に加え、本実施形態ではさらに、中間膜15の厚さの変化に起因する光学的な歪みを隠すためにマスキング12を利用している。すなわち、中間膜15の厚さの変化率が不連続となる部分をマスキング12にて覆っている。より好ましくは、楔形部151と第1の側部153との境界BL1の全部がマスキング12の内周縁12e(図2参照)よりも下辺10b側に位置していることである。 In general, the purpose of providing the masking 12 is to prevent deterioration of the adhesive that fixes the windshield 10 to the body of an automobile due to solar radiation, and to enhance the aesthetics by shielding terminals and deisers of heating wires. In addition to such a purpose, the present embodiment further uses the masking 12 to hide the optical distortion caused by the change in the thickness of the intermediate film 15. That is, the masking 12 covers a portion where the change rate of the thickness of the intermediate film 15 is discontinuous. More preferably, the entire boundary BL 1 between the wedge-shaped portion 151 and the first side portion 153 is located on the lower side 10b side with respect to the inner peripheral edge 12e of the masking 12 (see FIG. 2).
また、本実施形態において、マスキング12は、第1ガラス板11の凹面11p(ウインドシールド10の車内側の主面)に設けられている。ただし、第1ガラス板11の凸面、すなわち、中間膜15と接する面にマスキングが設けられていてもよい。さらに、車外側の第2ガラス板13にマスキングが設けられていてもよい。図4に示すように、例えば、第2ガラス板13の中間膜15と接する面に第2マスキング14を設けることができる。このように、中間膜15を挟むように2層以上のマスキング12,14が設けられている場合、車内側からも車外側からも光学的な歪みが視認にくくなる。   In the present embodiment, the masking 12 is provided on the concave surface 11p of the first glass plate 11 (the main surface on the vehicle inner side of the windshield 10). However, masking may be provided on the convex surface of the first glass plate 11, that is, the surface in contact with the intermediate film 15. Further, masking may be provided on the second glass plate 13 outside the vehicle. As shown in FIG. 4, the 2nd masking 14 can be provided in the surface which contact | connects the intermediate film 15 of the 2nd glass plate 13, for example. In this way, when two or more layers of masking 12 and 14 are provided so as to sandwich the intermediate film 15, optical distortion is difficult to visually recognize from both the inside of the vehicle and the outside of the vehicle.
図2に示すように、楔形部151における中間膜15の第2主面151kがウインドシールド10の車内側に位置し、中間膜15の平坦な第1主面15pがウインドシールド10の車外側に位置するように、ウインドシールド10の曲げ方向が定められている。すなわち、第2主面151kが第1ガラス板11に接し、第1主面15pが第2ガラス板13に接している。ただし、これとは逆の向きに中間膜15が配置されていてもよい。すなわち、第2主面151kが第2ガラス板13に接し、第1主面15pが第1ガラス板11に接する向きで、中間膜15が第1ガラス板11と第2ガラス板13との間に挟まれていてもよい。   As shown in FIG. 2, the second main surface 151 k of the intermediate film 15 in the wedge-shaped portion 151 is located on the vehicle inner side of the windshield 10, and the flat first main surface 15 p of the intermediate film 15 is on the vehicle outer side of the windshield 10. The bending direction of the windshield 10 is determined so as to be positioned. That is, the second main surface 151 k is in contact with the first glass plate 11, and the first main surface 15 p is in contact with the second glass plate 13. However, the intermediate film 15 may be arranged in the opposite direction. That is, the intermediate film 15 is between the first glass plate 11 and the second glass plate 13 with the second main surface 151k in contact with the second glass plate 13 and the first main surface 15p in contact with the first glass plate 11. It may be sandwiched between.
(第2実施形態)
図1に示すウインドシールド10には、図5に示す中間膜25を好適に用いることができる。本実施形態の中間膜25は、厚さが変化する第1の側部155を有する点で第1実施形態と相違する。
(Second Embodiment)
The intermediate film 25 shown in FIG. 5 can be suitably used for the windshield 10 shown in FIG. The intermediate film 25 of the present embodiment is different from the first embodiment in that it has a first side portion 155 whose thickness changes.
図5に示すように、第1の側部155の厚さは、楔形部151から遠ざかるにつれて漸増している。第1実施形態と同様に、中間膜25は、第1主面15pが平坦面となるように成形されている。第1主面15pを平坦面とした場合に、第1の側部155における第2主面155kが第1主面15pに対して一定角度傾斜した平面をなすように第1の側部155の形状が定められている。また、第1の側部155の最大厚さd2が楔形部151の最大厚さD1よりも小となるように、第1の側部155の寸法が定められている。第1の側部155は、ウインドシールド10の下端部において最大厚さd2となる。楔形部151は、ウインドシールド10の上端部において最大厚さD1となる。中間膜25は、楔形部151と第1の側部155との境界BL1において、最小の厚さとなる。中間膜25の上端部と下端部の膜厚差(D1−d2)は、図3に示す中間膜15の膜厚差(D1−d1)よりも小さい。したがって、本実施形態の中間膜25によれば、ウインドシールド10の上端部の厚さと下端部の厚さとの差を縮小するのに有利である。 As shown in FIG. 5, the thickness of the first side portion 155 gradually increases as the distance from the wedge-shaped portion 151 increases. Similar to the first embodiment, the intermediate film 25 is formed such that the first main surface 15p is a flat surface. When the first main surface 15p is a flat surface, the second main surface 155k of the first side portion 155 has a plane inclined at a certain angle with respect to the first main surface 15p. The shape is defined. In addition, the dimension of the first side portion 155 is determined so that the maximum thickness d 2 of the first side portion 155 is smaller than the maximum thickness D 1 of the wedge-shaped portion 151. The first side portion 155 has a maximum thickness d 2 at the lower end portion of the windshield 10. The wedge-shaped portion 151 has a maximum thickness D 1 at the upper end portion of the windshield 10. The intermediate film 25 has a minimum thickness at the boundary BL 1 between the wedge-shaped portion 151 and the first side portion 155. The film thickness difference (D 1 −d 2 ) between the upper end and the lower end of the intermediate film 25 is smaller than the film thickness difference (D 1 −d 1 ) of the intermediate film 15 shown in FIG. Therefore, the intermediate film 25 of this embodiment is advantageous in reducing the difference between the thickness of the upper end portion and the lower end portion of the windshield 10.
自動車用のウインドシールドは、JIS R3211(1998)に規定された「4.2 厚さ」の試験を満足する必要がある。ウインドシールドの厚さの測定は、JIS R3212(1998)に規定された「3.2 厚さの測定」に基づいて行われる。具体的には、ウインドシールドの周縁から25mm以内の等間隔の任意の複数点における厚さを測定する。得られた全ての測定値は、ウインドシールドの呼び厚さに対して±0.4mmの範囲に収まっている必要がある。二重像となる度合いを軽減する目的を達成するためには、中間膜のテーパー(楔形部の楔角)を適度に確保しなければならない。ウインドシールドを構成するガラス板の板厚の公差や中間膜の厚さの公差を考慮すると、テーパーを大きくするほど、厚さ試験に合格することが難しくなる。   A windshield for an automobile needs to satisfy the “4.2 thickness” test defined in JIS R3211 (1998). The thickness of the windshield is measured based on “3.2 Thickness Measurement” defined in JIS R3212 (1998). Specifically, the thickness is measured at a plurality of points at equal intervals within 25 mm from the periphery of the windshield. All the measured values obtained need to be within a range of ± 0.4 mm with respect to the nominal thickness of the windshield. In order to achieve the purpose of reducing the degree of double image formation, the taper of the interlayer film (the wedge angle of the wedge-shaped portion) must be appropriately secured. Considering the tolerance of the thickness of the glass plate constituting the windshield and the tolerance of the thickness of the interlayer film, it is difficult to pass the thickness test as the taper is increased.
ところが、ウインドシールド10の下辺10bに近づくにつれて厚さが漸増する第1の側部155を有した本実施形態の中間膜25によれば、テーパーを比較的大きく設定した場合であっても、厚さ試験に合格するウインドシールドの安定生産が容易となる。   However, according to the intermediate film 25 of the present embodiment having the first side portion 155 whose thickness gradually increases as it approaches the lower side 10b of the windshield 10, even if the taper is set to be relatively large, The stable production of windshields that pass the thickness test is facilitated.
(第3実施形態)
図6に示す中間膜35は、第1の側部157の厚さが楔形部151から遠ざかるにつれて漸増し、第1の側部157の最大厚さd2が楔形部151の最大厚さD1よりも小さいという点では、図5に示す中間膜25と一致している。
(Third embodiment)
The intermediate film 35 shown in FIG. 6 gradually increases as the thickness of the first side portion 157 increases from the wedge-shaped portion 151, and the maximum thickness d 2 of the first side portion 157 is the maximum thickness D 1 of the wedge-shaped portion 151. Is smaller than the intermediate film 25 shown in FIG.
第1主面15pを平坦面とした場合に、第1の側部157における第2主面157kが第1主面15pに対して凹の曲面をなすように、第1の側部157の形状が定められている。具体的に、第1の側部157における第2主面157kは、図6の断面図において、曲率半径R1の円弧を示している。第1の側部157の厚さの変化率は、楔形部151から遠ざかるにつれて連続的に大きくなっている。楔形部151と第1の側部157とは、境界BL1において滑らかにつながっている。楔形部151と第1の側部157とが曲面で滑らかにつながっていると、楔形部151と第1の側部157との境界BL1で厚さの変化率が連続となる。すると、ウインドシールド10に光学的な歪みが生じにくくなる。また、境界BL1の近傍への応力の集中を緩和することができるので、中間膜35の接着力の低下やガラスの割れといった不具合の発生を抑制する効果も期待できる。 When the first main surface 15p is a flat surface, the shape of the first side portion 157 is such that the second main surface 157k of the first side portion 157 forms a concave curved surface with respect to the first main surface 15p. Is stipulated. Specifically, the second main surface 157k of the first side 157, in the sectional view of FIG. 6 illustrates an arc of the radius of curvature R 1. The rate of change of the thickness of the first side portion 157 continuously increases as the distance from the wedge-shaped portion 151 increases. The wedge-shaped portion 151 and the first side portion 157 are smoothly connected at the boundary BL 1 . When the wedge-shaped portion 151 and the first side portion 157 are smoothly connected with a curved surface, the thickness change rate becomes continuous at the boundary BL 1 between the wedge-shaped portion 151 and the first side portion 157. Then, optical distortion is less likely to occur in the windshield 10. In addition, since the concentration of stress near the boundary BL 1 can be relaxed, an effect of suppressing the occurrence of defects such as a decrease in the adhesive strength of the intermediate film 35 and glass cracking can be expected.
図6に示す中間膜35によれば、楔形部151と第1の側部157とが曲面で滑らかにつながっているので、光学的な歪みは生じにくい。したがって、楔形部151と第1の側部157との境界BL1が必ずしもマスキング12に重なっていなくてもよい。もちろん、高さ方向HLに関する第1の側部157の幅Wがマスキング12の幅よりも小さく定められ、楔形部151と第1の側部157との境界BL1がマスキング12に重なっていてもよい。 According to the intermediate film 35 shown in FIG. 6, since the wedge-shaped portion 151 and the first side portion 157 are smoothly connected with a curved surface, optical distortion hardly occurs. Therefore, the boundary BL 1 between the wedge-shaped portion 151 and the first side portion 157 does not necessarily overlap the masking 12. Of course, even if the width W of the first side portion 157 in the height direction HL is determined to be smaller than the width of the masking 12, and the boundary BL 1 between the wedge-shaped portion 151 and the first side portion 157 overlaps the masking 12. Good.
(第4実施形態)
図7に示す中間膜45は、楔形部161、楔形部161の下端部(薄肉端)に続く第1の側部153および楔形部161の上端部(厚肉端)に続く第2の側部164を有する。すなわち、ウインドシールド10の上辺側に第2の側部164を有する点で、本実施形態の中間膜45は、前述の中間膜15,25,35と相違する。
(Fourth embodiment)
The intermediate film 45 shown in FIG. 7 includes a wedge-shaped portion 161, a first side portion 153 following the lower end portion (thin end) of the wedge-shaped portion 161, and a second side portion following the upper end portion (thick end) of the wedge-shaped portion 161. 164. That is, the intermediate film 45 of this embodiment is different from the above-described intermediate films 15, 25, and 35 in that the second side portion 164 is provided on the upper side of the windshield 10.
第1の側部153は、楔形部161の下端部の厚さと等しい一定の厚さd1を有している。第2の側部164は、楔形部161の上端部の厚さと等しい一定の厚さD1を有している。第1の側部153は、第1実施形態の中間膜15と同じものである。試験領域Bの全部が楔形部161によって貼り合わされた部分に含まれるように、ウインドシールド10の高さ方向HLに関する第1の側部153の幅W1を定めることができる。好適には、楔形部161と第1の側部153との境界BL1がマスキング12に重なるように、ウインドシールド10の高さ方向HLに関する第1の側部153の幅W1を定めることができる。第2の側部164の幅W2は、例えば30〜150mmの範囲にある。第2の側部164を設けることにより、ウインドシールド10の上端部の厚さと、下端部の厚さとの差をさらに縮小することができる。第1および第2の側部153,164における第2主面153k,164kは、それぞれ、第1主面15p(平坦面)に平行である。楔形部161における第2主面161kは、第1主面15pに対して傾斜した平面である。 The first side portion 153 has a constant thickness d 1 that is equal to the thickness of the lower end portion of the wedge-shaped portion 161. The second side portion 164 has a constant thickness D 1 equal to the thickness of the upper end portion of the wedge-shaped portion 161. The first side portion 153 is the same as the intermediate film 15 of the first embodiment. The width W 1 of the first side portion 153 with respect to the height direction HL of the windshield 10 can be determined so that the entire test region B is included in the portion bonded by the wedge-shaped portion 161. Preferably, the width W 1 of the first side portion 153 with respect to the height direction HL of the windshield 10 is determined so that the boundary BL 1 between the wedge-shaped portion 161 and the first side portion 153 overlaps the masking 12. it can. The width W 2 of the second side portion 164 is, for example, in the range of 30 to 150 mm. By providing the second side portion 164, the difference between the thickness of the upper end portion of the windshield 10 and the thickness of the lower end portion can be further reduced. The second main surfaces 153k and 164k in the first and second side portions 153 and 164 are parallel to the first main surface 15p (flat surface), respectively. The second main surface 161k in the wedge-shaped portion 161 is a plane inclined with respect to the first main surface 15p.
本実施形態の中間膜45によれば、楔形部161の楔角を、前述の中間膜15,25,35における楔角よりも大きくすることが可能である。つまり、楔形部161の楔角(中間膜45のテーパー)の調整可能範囲が拡大するので、ウインドシールド10に映し出される像が二重像となる度合いを改善しやすくなる。   According to the intermediate film 45 of the present embodiment, the wedge angle of the wedge-shaped portion 161 can be made larger than the wedge angle in the above-described intermediate films 15, 25, and 35. That is, since the adjustable range of the wedge angle (taper of the intermediate film 45) of the wedge-shaped portion 161 is expanded, it is easy to improve the degree that the image projected on the windshield 10 becomes a double image.
さらに、本実施形態の中間膜45によれば、楔形部161と第2の側部164との境界BL2において厚さの変化率が不連続となる。したがって、上記境界BL2の近傍で光学的な歪みが生ずる可能性がある。この場合、第1の側部153と同様に、試験領域Bの全部が楔形部161によって貼り合わされた部分に含まれるように、ウインドシールド10の高さ方向HLに関する第2の側部164の幅W2を定めることができる。好適には、上記境界BL2がマスキング12と重なるように、高さ方向HLに関する第2の側部164の幅W2を定めることができる。図1に示すように、マスキング12は、ウインドシールド10の上辺10t側の周辺部にも設けられているので、第2の側部164をマスキング12で隠すことが可能である。 Furthermore, according to the intermediate film 45 of the present embodiment, the rate of change in thickness is discontinuous at the boundary BL 2 between the wedge-shaped portion 161 and the second side portion 164. Therefore, there is a possibility that optical distortion occurs in the vicinity of the boundary BL 2. In this case, similarly to the first side portion 153, the width of the second side portion 164 with respect to the height direction HL of the windshield 10 so that the entire test region B is included in the portion bonded by the wedge-shaped portion 161. W 2 can be determined. Preferably, the boundary BL 2 is to overlap the masking 12 may define a width W 2 of the second side 164 about the height direction HL. As shown in FIG. 1, since the masking 12 is also provided in the peripheral portion on the upper side 10 t side of the windshield 10, the second side portion 164 can be hidden by the masking 12.
図1に示すように、ウインドシールド10の上辺10t側におけるマスキング12の幅H3は、広い視界を確保するために、下辺10b側におけるマスキング12の幅H2よりも狭くすることができる。したがって、ウインドシールド10の上辺10t側において第2の側部164をマスキング12で遮蔽するために、図7に示すように、第2の側部164の幅W2を第1の側部153の幅W1よりも狭くすることができる。 As shown in FIG. 1, the width H 3 of the masking 12 on the upper side 10t side of the windshield 10 can be made narrower than the width H 2 of the masking 12 on the lower side 10b side in order to ensure a wide field of view. Accordingly, in order to shield the second side portion 164 with the masking 12 on the upper side 10t side of the windshield 10, the width W 2 of the second side portion 164 is set to be equal to that of the first side portion 153 as shown in FIG. It can be made narrower than the width W 1 .
さらに、図12に示すように、上記境界BL2を含むように着色領域SBを中間膜45に設けてもよい。このような着色領域SBは、一般にシェードバンドと呼ばれ、図13に示すように、ウインドシールド20の上辺側に設けられる。着色領域SBによれば、境界BL2の近傍に生ずることのある光学的な歪みを目立たなくすることができる。 Furthermore, as shown in FIG. 12, a colored region SB may be provided in the intermediate film 45 so as to include the boundary BL 2 . Such a colored region SB is generally called a shade band and is provided on the upper side of the windshield 20 as shown in FIG. According to the colored region SB, optical distortion that may occur in the vicinity of the boundary BL 2 can be made inconspicuous.
着色領域SBには、ウインドシールド20の上辺側から下辺側に進むにつれて色が薄くなるグラデーションが付与されていてもよい。また、このような着色領域SBに代えて、第1ガラス板11および/または第2ガラス板13の主面上に、楔形部161と第2の側部164との境界BL2と重なるようにドットパターンを設けることができる。そのようなドットパターンは、マスキング12と共通の材料によって構成でき、ウインドシールド20の上辺側におけるマスキング12の一部として設けることができる。 The coloring region SB may be provided with a gradation in which the color becomes lighter from the upper side to the lower side of the windshield 20. Further, instead of such colored regions SB, on the main surface of the first glass plate 11 and / or the second glass plate 13, so as to overlap the boundary BL 2 between wedge part 161 and the second side 164 A dot pattern can be provided. Such a dot pattern can be made of the same material as the masking 12 and can be provided as a part of the masking 12 on the upper side of the windshield 20.
なお、本実施形態から理解できるように、下辺側の第1の側部を有さず、楔形部と上辺側の第2の側部とを有する中間膜も本発明に含まれる。このことは、以降の実施形態についても同様である。   As can be understood from the present embodiment, an intermediate film having a wedge-shaped portion and a second side portion on the upper side without including the first side portion on the lower side is also included in the present invention. The same applies to the following embodiments.
(第5実施形態)
図8に示す中間膜55は、楔形部161から遠ざかるにつれて厚さが漸減する第2の側部166を有する。楔形部161と第1の側部153は、図7に示す中間膜45と同じものである。第2の側部166における第2主面166kが第1主面15pに対して一定角度傾斜した平面をなすように、第2の側部166の形状が定められている。すなわち、第2の側部166の厚さの変化率は一定である。第2の側部166の最小厚さD2は、第1の側部153の厚さd1よりも大きく、楔形部161の上端部の厚さD1よりも小さい。このような中間膜55によれば、ウインドシールド10の上端部の厚さと下端部の厚さとの差を、図7に示した中間膜45よりもさらに縮小できる。
(Fifth embodiment)
The intermediate film 55 shown in FIG. 8 has a second side portion 166 whose thickness gradually decreases as the distance from the wedge-shaped portion 161 increases. The wedge-shaped portion 161 and the first side portion 153 are the same as the intermediate film 45 shown in FIG. The shape of the second side portion 166 is determined so that the second main surface 166k of the second side portion 166 forms a plane inclined at a certain angle with respect to the first main surface 15p. That is, the rate of change of the thickness of the second side portion 166 is constant. The minimum thickness D 2 of the second side portion 166 is larger than the thickness d 1 of the first side portion 153 and smaller than the thickness D 1 of the upper end portion of the wedge-shaped portion 161. With such an intermediate film 55, the difference between the thickness of the upper end portion and the lower end portion of the windshield 10 can be further reduced as compared with the intermediate film 45 shown in FIG.
(第6実施形態)
図9に示す中間膜65は、楔形部162、第1の側部153および第2の側部168を有する。第1の側部153は、楔形部162の下端部と等しい一定の厚さd1を有する部分である。第2の側部168は、楔形部162から遠ざかるにつれて厚さが漸減する部分である。第2の側部168における第2主面168kが第1主面15p(平坦面)に対して凸の曲面をなすように、第2の側部168の形状が定められている。
(Sixth embodiment)
The intermediate film 65 shown in FIG. 9 has a wedge-shaped portion 162, a first side portion 153, and a second side portion 168. The first side portion 153 is a portion having a constant thickness d 1 equal to the lower end portion of the wedge-shaped portion 162. The second side portion 168 is a portion where the thickness gradually decreases as the distance from the wedge-shaped portion 162 increases. The shape of the second side portion 168 is determined so that the second main surface 168k of the second side portion 168 has a convex curved surface with respect to the first main surface 15p (flat surface).
ウインドシールド10の厚さ方向TLおよび高さ方向HLに平行な断面において、第2の側部168における第2主面168kは曲率半径R2の円弧を示す。さらに、楔形部162は、楔形部162における第2主面162kが、第2の側部168における第2主面168kに滑らかに接続する形状に調整されている。楔形部162における第2主面162kは、第2の側部168との境界BL2の近傍では曲面をなし、第1の側部153との境界BL1の近傍では楔角がほぼ一定になるような平面をなす。このように、楔形部162と第2の側部168とが曲面で滑らかにつながっていると、楔形部162と第2の側部168との境界BL2で厚さの変化率が連続となる。そのため、ウインドシールド10に光学的な歪みが生じにくくなる。 In a cross section parallel to the thickness direction TL and the height direction HL of the windshield 10, the second main surface 168k of the second side 168 indicates the arc of radius of curvature R 2. Further, the wedge-shaped portion 162 is adjusted so that the second main surface 162k of the wedge-shaped portion 162 is smoothly connected to the second main surface 168k of the second side portion 168. The second main surface 162k of the wedge-shaped portion 162 forms a curved surface in the vicinity of the boundary BL 2 with the second side portion 168, and the wedge angle becomes substantially constant in the vicinity of the boundary BL 1 with the first side portion 153. Make a plane like this. Thus, when the wedge-shaped portion 162 and the second side portion 168 are smoothly connected with a curved surface, the thickness change rate is continuous at the boundary BL 2 between the wedge-shaped portion 162 and the second side portion 168. . Therefore, optical distortion is less likely to occur in the windshield 10.
さらに、楔形部162と第1の側部153との境界BL1が試験領域Bの外側に位置しているとよい。好適には、境界BL1がマスキング12と重なっていることである。同様に、楔形部162と第2の側部168との境界BL2が試験領域Bの外側に位置しているとよい。境界BL2は、マスキング12と重なっていなくてもよいし、重なっていてもよい。また、楔形部162と第2の側部168とが曲面で滑らかにつながっていると、境界BL2の近傍への応力の集中を緩和することができるので、中間膜65の接着力の低下やガラスの割れといった不具合の発生を抑制する効果も期待できる。 Furthermore, the boundary BL 1 between the wedge-shaped portion 162 and the first side portion 153 may be located outside the test region B. Preferably, the boundary BL 1 overlaps the masking 12. Similarly, the boundary BL 2 between the wedge-shaped portion 162 and the second side portion 168 may be located outside the test region B. The boundary BL 2 may not overlap with the masking 12 or may overlap. In addition, when the wedge-shaped portion 162 and the second side portion 168 are smoothly connected with a curved surface, the stress concentration near the boundary BL 2 can be relaxed. The effect which suppresses generation | occurrence | production of defects, such as a glass crack, can also be expected.
(第7実施形態)
図10に示す中間膜75は、楔形部161、第1の側部159および第2の側部169を有する。第1の側部159は、楔形部161から遠ざかるにつれて楔形部161よりも緩やかに厚さが減少している部分である。第2の側部169は、楔形部161から遠ざかるにつれて楔形部161よりも緩やかに厚さが増加している部分である。楔形部161における第2主面161k、第1の側部159における第2主面159kおよび第2の側部169における第2主面169kは、いずれも、第1主面15pに対して傾斜している。楔形部161における第2主面161kの傾き(楔角)は、他の部分の傾きよりも大きい。
(Seventh embodiment)
The intermediate film 75 shown in FIG. 10 has a wedge-shaped portion 161, a first side portion 159, and a second side portion 169. The first side portion 159 is a portion where the thickness is gradually reduced as compared with the wedge-shaped portion 161 as the distance from the wedge-shaped portion 161 increases. The second side portion 169 is a portion where the thickness increases more gradually than the wedge-shaped portion 161 as the distance from the wedge-shaped portion 161 increases. The second main surface 161k in the wedge-shaped portion 161, the second main surface 159k in the first side portion 159, and the second main surface 169k in the second side portion 169 are all inclined with respect to the first main surface 15p. ing. The inclination (wedge angle) of the second main surface 161k in the wedge-shaped portion 161 is larger than the inclination of other portions.
このような中間膜75によれば、ウインドシールド10の上端部の厚さと下端部の厚さとの差を減じる効果は小さくなるものの、楔形部161の厚さの変化率と、第1の側部159の厚さの変化率との差を小さくできるため、両者の境界BL1の近傍に光学的な歪みが生じにくくなる。同様に、楔形部161の厚さの変化率と、第2の側部169の厚さの変化率との差を小さくできるため、両者の境界BL2の近傍に光学的な歪みが生じにくくなる。 According to such an intermediate film 75, although the effect of reducing the difference between the thickness of the upper end portion and the lower end portion of the windshield 10 is reduced, the change rate of the thickness of the wedge-shaped portion 161 and the first side portion are reduced. Since the difference from the change rate of the thickness of 159 can be reduced, optical distortion hardly occurs in the vicinity of the boundary BL 1 between the two. Similarly, since the difference between the change rate of the thickness of the wedge-shaped portion 161 and the change rate of the thickness of the second side portion 169 can be reduced, optical distortion is hardly generated in the vicinity of the boundary BL 2 between them. .
(第8実施形態)
本明細書の各実施形態から明らかなように、楔形部、第1の側部および第2の側部の各部の形状は個別に定めることができる。すなわち、本明細書に示した2以上の例を相互に組み合わせることが可能である。例えば、図11に示す中間膜85は、図6に示す中間膜35と、図9に示す中間膜65との組み合わせである。
(Eighth embodiment)
As is clear from the embodiments of the present specification, the shapes of the wedge-shaped portion, the first side portion, and the second side portion can be individually determined. That is, two or more examples shown in this specification can be combined with each other. For example, the intermediate film 85 shown in FIG. 11 is a combination of the intermediate film 35 shown in FIG. 6 and the intermediate film 65 shown in FIG.
第1主面15pを平坦面としたとき、第1の側部157における第2主面157kは、第1主面15pに対して凹の曲面(曲率半径R1の円弧)をなす。第2の側部168における第2主面168kは、第1主面15pに対して凸の曲面(曲率半径R2の円弧)をなす。楔形部162における第2主面162kは、第1の側部157および第2の側部168の両者に滑らかに接続する曲線状に調整されている。つまり、ウインドシールド10の厚さ方向TL(中間膜15の厚さ方向)および高さ方向HLに平行な断面において、中間膜85の第2主面168k,162k,157kは、全体として、S字状のプロファイルを示す。このような中間膜85によれば、上端部の厚さD3と下端部の厚さd2との差を小さく抑えつつ、光学的な歪みも生じにくくすることが可能である。さらに、中間膜85の一方の主面全体が曲面で構成されているので、光学的な歪みが生じにくい。 When the first major surface 15p and a flat surface, a second major surface 157k of the first side 157 forms a concave curved surface (circular arc of the radius of curvature R 1) to the first major surface 15p. The second major surface 168k of the second side 168 forms a convex curved surface (circular arc of curvature radius R 2) to the first major surface 15p. The second main surface 162k of the wedge-shaped portion 162 is adjusted to have a curved shape that smoothly connects to both the first side portion 157 and the second side portion 168. That is, in the cross section parallel to the thickness direction TL (the thickness direction of the intermediate film 15) of the windshield 10 and the height direction HL, the second main surfaces 168k, 162k, and 157k of the intermediate film 85 are S-shaped as a whole. The profile is shown. According Such intermediate film 85, while keeping small the difference between the thickness d 2 of the thick D 3 and a lower end of the upper portion, it is possible to also less likely to occur optical distortion. Furthermore, since one whole main surface of the intermediate film 85 is formed of a curved surface, optical distortion is unlikely to occur.
光学的な歪みが試験領域Bに生ずることを防止するために、楔形部162と第1の側部157との境界BL1が試験領域Bの外側に位置しているとよい。同じ理由で、楔形部162と第2の側部168との境界BL2が試験領域Bの外側に位置しているとよい。さらに、光学的な歪みが視認されることを防止するという観点において、楔形部162と第1の側部157との境界BL1がマスキング12に重なっていてもよく、楔形部162と第2の側部168との境界BL2がマスキング12に重なっていてもよい。さらに、楔形部162と第2の側部168との境界BL2を含むように、着色領域SB(図13参照)が設けられていてもよい。 In order to prevent optical distortion from occurring in the test region B, the boundary BL 1 between the wedge-shaped portion 162 and the first side portion 157 may be located outside the test region B. For the same reason, the boundary BL 2 between the wedge-shaped portion 162 and the second side portion 168 may be located outside the test region B. Furthermore, in terms of preventing optical distortion from being visually recognized, the boundary BL 1 between the wedge-shaped portion 162 and the first side portion 157 may overlap the masking 12, and the wedge-shaped portion 162 and the second side portion 157 may overlap each other. The boundary BL 2 with the side portion 168 may overlap the masking 12. Further, the colored region SB (see FIG. 13) may be provided so as to include the boundary BL 2 between the wedge-shaped portion 162 and the second side portion 168.
本発明の第1実施形態にかかるウインドシールドの平面図The top view of the windshield concerning 1st Embodiment of this invention 図1のウインドシールドのII−II断面図II-II sectional view of the windshield in Fig. 1 図1のウインドシールドに用いられた中間膜の断面図Sectional view of the intermediate film used in the windshield of FIG. 複数の遮蔽層を設けたウインドシールドの断面図Cross section of windshield with multiple shielding layers 第2実施形態にかかる中間膜の断面図Sectional drawing of the intermediate film concerning 2nd Embodiment 第3実施形態にかかる中間膜の断面図Sectional drawing of the intermediate film concerning 3rd Embodiment 第4実施形態にかかる中間膜の断面図Sectional drawing of the intermediate film concerning 4th Embodiment 第5実施形態にかかる中間膜の断面図Sectional drawing of the intermediate film concerning 5th Embodiment 第6実施形態にかかる中間膜の断面図Sectional drawing of the intermediate film concerning 6th Embodiment 第7実施形態にかかる中間膜の断面図Sectional drawing of the intermediate film concerning 7th Embodiment 第8実施形態にかかる中間膜の断面図Sectional drawing of the intermediate film concerning 8th Embodiment 着色領域を有する中間膜の断面図Cross-sectional view of an intermediate film having a colored region 図12の中間膜が用いられたウインドシールドの平面図A plan view of a windshield using the intermediate film of FIG.
符号の説明Explanation of symbols
10,20 ウインドシールド
11 第1ガラス板
12,14 マスキング
13 第2ガラス板
15,25,35,45,55,65,75,85 中間膜
15p 第1主面
151,161,162 楔形部
151k,161k,162k 楔形部における中間膜の第2主面
153,155,157,159 第1の側部
153k,155k,157k,159k 第1の側部における中間膜の第2主面
166,168,169 第2の側部
166k,168k,169k 第2の側部における中間膜の第2主面
SB 着色領域
BL1,BL2 境界
10, 20 Windshield 11 First glass plate 12, 14 Masking 13 Second glass plate 15, 25, 35, 45, 55, 65, 75, 85 Intermediate film 15p First main surface 151, 161, 162 Wedge-shaped portion 151k, 161k, 162k Second main surface 153, 155, 157, 159 of the intermediate film in the wedge-shaped part First second parts 153k, 155k, 157k, 159k Second main surface 166, 168, 169 of the intermediate film in the first side part Second side portion 166k, 168k, 169k Second main surface SB of intermediate film in second side portion Colored region BL 1 , BL 2 boundary

Claims (10)

  1. 互いに貼り合わされた2枚の板状体と、前記2枚の板状体の間に挟み込まれた中間膜とを備えたウインドシールドであって、
    前記中間膜は、当該ウインドシールドの上辺側から下辺側に進むにつれて厚さが漸減する楔形部と、前記楔形部の下端部に続く第1の側部および/または前記楔形部の上端部に続く第2の側部とを有し、
    前記第1の側部は、前記楔形部の下端部の厚さと等しい一定の厚さを有する部分、前記楔形部から遠ざかるにつれて厚さが漸増している部分、または、前記楔形部から遠ざかるにつれて前記楔形部よりも緩やかに厚さが減少している部分であり、
    前記第2の側部は、前記楔形部の上端部の厚さと等しい一定の厚さを有する部分、前記楔形部から遠ざかるにつれて厚さが漸減している部分、または、前記楔形部から遠ざかるにつれて前記楔形部よりも緩やかに厚さが増加している部分であり、
    JIS R3212の附属書に規定された試験領域Bの全部が前記楔形部によって貼り合わされた部分に含まれるように、当該ウインドシールドの高さ方向に関する前記第1の側部および/または前記第2の側部の幅が定められている、ウインドシールド。
    A windshield comprising two plate-like bodies bonded to each other and an intermediate film sandwiched between the two plate-like bodies,
    The intermediate film continues to the wedge-shaped portion whose thickness gradually decreases from the upper side to the lower side of the windshield, the first side portion following the lower end portion of the wedge-shaped portion, and / or the upper end portion of the wedge-shaped portion. A second side,
    The first side portion has a constant thickness equal to the thickness of the lower end portion of the wedge-shaped portion, a portion whose thickness gradually increases as the distance from the wedge-shaped portion, or the distance from the wedge-shaped portion increases. It is the part where the thickness decreases more slowly than the wedge-shaped part,
    The second side portion is a portion having a constant thickness equal to the thickness of the upper end portion of the wedge-shaped portion, a portion where the thickness is gradually decreased as the distance from the wedge-shaped portion is increased, or as the distance from the wedge-shaped portion is increased. It is the part where the thickness increases more slowly than the wedge-shaped part,
    The first side portion and / or the second side with respect to the height direction of the windshield so that the entire test region B defined in the annex of JIS R3212 is included in the portion bonded by the wedge-shaped portion. Windshield with a defined width on the side.
  2. 前記2枚の板状体から選ばれる少なくとも1つの板状体の周辺部に設けられた遮蔽層をさらに備え、
    前記楔形部と前記第1の側部との境界および/または前記楔形部と前記第2の側部との境界が、当該ウインドシールドの厚さ方向に関して前記遮蔽層と重なるように、当該ウインドシールドの高さ方向に関する前記第1の側部および/または前記第2の側部の幅が定められている、請求項1に記載のウインドシールド。
    A shielding layer provided at the periphery of at least one plate selected from the two plates;
    The windshield such that a boundary between the wedge-shaped portion and the first side portion and / or a boundary between the wedge-shaped portion and the second side portion overlaps the shielding layer in the thickness direction of the windshield. The windshield according to claim 1, wherein a width of the first side part and / or the second side part with respect to a height direction of the first side part is defined.
  3. 前記中間膜の第1主面が平坦面であると仮定した場合に、
    前記中間膜の第2主面側において、前記楔形部と前記第1の側部とが前記第1主面に対して凹の曲面でつながっている、請求項1または請求項2記載のウインドシールド。
    When it is assumed that the first main surface of the intermediate film is a flat surface,
    3. The windshield according to claim 1, wherein the wedge-shaped portion and the first side portion are connected to the first main surface by a concave curved surface on the second main surface side of the intermediate film. .
  4. 前記中間膜の第1主面が平坦面であると仮定した場合に、
    前記中間膜の第2主面側において、前記楔形部と前記第2の側部とが前記第1主面に対して凸の曲面でつながっている、請求項1ないし請求項3のいずれか1項に記載のウインドシールド。
    When it is assumed that the first main surface of the intermediate film is a flat surface,
    The wedge-shaped portion and the second side portion are connected to the first main surface by a convex curved surface on the second main surface side of the intermediate film. Windshield according to item.
  5. 前記楔形部と前記第2の側部との境界を含むように前記中間膜に着色領域が設けられている、請求項1ないし請求項4のいずれか1項に記載のウインドシールド。   The windshield according to any one of claims 1 to 4, wherein a colored region is provided in the intermediate film so as to include a boundary between the wedge-shaped portion and the second side portion.
  6. 前記高さ方向に関する前記第1の側部の幅が30mm以上170mm以下の範囲にある、請求項1ないし請求項5のいずれか1項に記載のウインドシールド。   The windshield according to any one of claims 1 to 5, wherein a width of the first side portion in the height direction is in a range of 30 mm to 170 mm.
  7. 上端部の厚さと下端部の厚さとの差が0.05mm以上0.8mm以下の範囲にある、請求項1ないし請求項6のいずれか1項に記載のウインドシールド。   The windshield according to any one of claims 1 to 6, wherein a difference between a thickness of the upper end portion and a thickness of the lower end portion is in a range of 0.05 mm or more and 0.8 mm or less.
  8. 2枚の透明な板状体に挟み込まれてそれら板状体とともにウインドシールドを構成するウインドシールド用中間膜であって、
    前記ウインドシールドの上辺側から下辺側に進むにつれて厚さが漸減する楔形部と、前記楔形部の下端部に続く第1の側部および/または前記楔形部の上端部に続く第2の側部とを有し、
    前記第1の側部は、前記楔形部の下端部の厚さと等しい一定の厚さを有する部分、前記楔形部から遠ざかるにつれて厚さが漸増している部分、または、前記楔形部から遠ざかるにつれて前記楔形部よりも緩やかに厚さが減少している部分であり、
    前記第2の側部は、前記楔形部の上端部の厚さと等しい一定の厚さを有する部分、前記楔形部から遠ざかるにつれて厚さが漸減している部分、または、前記楔形部から遠ざかるにつれて前記楔形部よりも緩やかに厚さが増加している部分であり、
    当該中間膜の第1主面が平坦面であると仮定した場合に、
    当該中間膜の第2主面側において、前記楔形部と前記第1の側部とが前記第1主面に対して凹の曲面でつながっている、および/または、前記楔形部と前記第2の側部とが前記第1主面に対して凸の曲面でつながっている、ウインドシールド用中間膜。
    A windshield intermediate film that is sandwiched between two transparent plates and constitutes a windshield together with the plates,
    A wedge-shaped portion having a thickness that gradually decreases from the upper side to the lower side of the windshield, and a first side that follows the lower end of the wedge-shaped portion and / or a second side that continues to the upper end of the wedge-shaped portion And
    The first side portion has a constant thickness equal to the thickness of the lower end portion of the wedge-shaped portion, a portion whose thickness gradually increases as the distance from the wedge-shaped portion, or the distance from the wedge-shaped portion increases. It is the part where the thickness decreases more slowly than the wedge-shaped part,
    The second side portion is a portion having a constant thickness equal to the thickness of the upper end portion of the wedge-shaped portion, a portion where the thickness is gradually decreased as the distance from the wedge-shaped portion is increased, or as the distance from the wedge-shaped portion is increased. It is the part where the thickness increases more slowly than the wedge-shaped part,
    When it is assumed that the first main surface of the intermediate film is a flat surface,
    On the second main surface side of the intermediate film, the wedge-shaped portion and the first side portion are connected to the first main surface by a concave curved surface, and / or the wedge-shaped portion and the second side. The intermediate film for windshields which is connected to the first main surface by a convex curved surface.
  9. 2枚の透明な板状体に挟み込まれてそれら板状体とともにウインドシールドを構成するウインドシールド用中間膜であって、
    前記ウインドシールドの上辺側から下辺側に進むにつれて厚さが漸減する楔形部と、前記楔形部の下端部に続く第1の側部とを備え、
    前記第1の側部は、前記楔形部の下端部の厚さと等しい一定の厚さを有する部分、前記楔形部から遠ざかるにつれて厚さが漸増している部分、または、前記楔形部から遠ざかるにつれて前記楔形部よりも緩やかに厚さが減少している部分であり、
    前記ウインドシールドの高さ方向に関する前記第1の側部の幅が30mm以上170mm以下の範囲にある、ウインドシールド用中間膜。
    A windshield intermediate film that is sandwiched between two transparent plates and constitutes a windshield together with the plates,
    A wedge-shaped portion having a thickness that gradually decreases from the upper side to the lower side of the windshield, and a first side that follows the lower end of the wedge-shaped portion,
    The first side portion has a constant thickness equal to the thickness of the lower end portion of the wedge-shaped portion, a portion whose thickness gradually increases as the distance from the wedge-shaped portion, or the distance from the wedge-shaped portion increases. It is the part where the thickness decreases more slowly than the wedge-shaped part,
    The intermediate film for windshields, wherein the width of the first side portion in the height direction of the windshield is in the range of 30 mm to 170 mm.
  10. 互いに貼り合わされた2枚の板状体と、前記2枚の板状体の間に挟み込まれた中間膜とを備えたウインドシールドであって、
    前記中間膜として、請求項8または請求項9記載の中間膜が用いられた、ウインドシールド。
    A windshield comprising two plate-like bodies bonded to each other and an intermediate film sandwiched between the two plate-like bodies,
    A windshield in which the intermediate film according to claim 8 or 9 is used as the intermediate film.
JP2007201058A 2007-08-01 2007-08-01 Windshield and interlayer for windshield Withdrawn JP2009035444A (en)

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