JPH09278466A - Thermally tempered sheet glass and method for finishing its end edge - Google Patents
Thermally tempered sheet glass and method for finishing its end edgeInfo
- Publication number
- JPH09278466A JPH09278466A JP8089537A JP8953796A JPH09278466A JP H09278466 A JPH09278466 A JP H09278466A JP 8089537 A JP8089537 A JP 8089537A JP 8953796 A JP8953796 A JP 8953796A JP H09278466 A JPH09278466 A JP H09278466A
- Authority
- JP
- Japan
- Prior art keywords
- heat
- glass
- strengthened
- plate glass
- polishing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Landscapes
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、例えば、吊り金具
を使用しない製造方法によって形成してあり、防火戸や
防火窓に用いることができる熱強化板ガラス及びその端
縁部分の仕上げ方法に関し、さらに詳しくは、全面にわ
たって熱強化処理を施してある熱強化板ガス及びその端
縁部分の仕上げ方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-strengthened glazing which is formed by a manufacturing method that does not use hanging fittings and can be used for fire doors and windows, and a method for finishing edge portions thereof. More specifically, the present invention relates to a heat-strengthened plate gas that has been heat-strengthened over the entire surface and a method for finishing the edge portion thereof.
【０００２】[0002]
【従来の技術】板ガラスを防火戸や防火窓に用いる場
合、板ガラスの熱割れ現象（熱を受けて板ガラスの中央
部に発生した熱膨張によって、窓枠等に支持された板ガ
ラスエッジ部分に引張応力が作用し、その引張応力が、
板ガラスに備わったエッジ強度を超えることによって割
れを生じる）を防止するために、ガラスのエッジ強度が
高いことが必要である。2. Description of the Related Art When a sheet glass is used for a fire door or a window, a thermal cracking phenomenon of the sheet glass (the thermal expansion generated in the central portion of the sheet glass due to heat causes tensile stress on the edge portion of the sheet glass supported by a window frame, etc. Acts and its tensile stress is
It is necessary that the edge strength of the glass be high in order to prevent cracking caused by exceeding the edge strength provided in the flat glass.
【０００３】防火用の板ガラスとしては、網入りガラス
や、含水珪酸アルカリからなる中間屠を挟み込んだ積層
ガラスが知られているが、前者は、内挿の網が視界を遮
り透視性を損なう危険性があり、後者は、前記中間層が
熱変化で発泡して不透明になり透視性を損なう危険性が
ある。これらの問題点が無いものとして、ソーダ石灰系
のガラスを熱強化処理したものが挙げられる。As a plate glass for fire prevention, there are known a net-cored glass and a laminated glass sandwiching intermediate slaughter made of hydrous alkali silicate, but in the former case, there is a danger that an interpolated net will block the view and impair the transparency. In the latter case, there is a risk that the intermediate layer foams due to heat change and becomes opaque, impairing the transparency. One that does not have these problems is a soda-lime glass that has been heat-strengthened.
【０００４】熱強化処理は、ガラスの軟化点（７２０〜
７３０℃）をかなり超える温度域（約７６０℃）で板ガ
ラスを加熱し、連続する空気冷却部分において、背圧９
５０ｍｍＡｑと非常に高い圧力で冷却空気を吹き付けて
実施される方法がある。但し、この様な板ガラスの熱強
化処理に伴っては、所定のエッジ強度を付与することは
できるものの、上述のとおりガラス軟化点を超える高温
域で加熱した板ガラスに強圧の空気を吹き付けるため
に、ガラス表面の平坦性に欠けたり、反りを生じて、反
射映像上の不具合を生じる危険性がある。The heat strengthening treatment involves the softening point (720 to 720) of glass.
The flat glass is heated in a temperature range (about 760 ° C) which is considerably higher than 730 ° C, and the back pressure is 9 at the continuous air cooling part.
There is a method in which cooling air is blown at a very high pressure of 50 mmAq. However, with such a heat strengthening treatment of the plate glass, although it is possible to impart a predetermined edge strength, in order to blow a strong pressure of air to the plate glass heated in a high temperature region exceeding the glass softening point as described above, There is a risk that the flatness of the glass surface may be lacking or warpage may occur, causing a defect in the reflected image.
【０００５】従来、この種の熱強化板ガラスとしては、
上述の熱強化処理を施したものがあり、その端縁部分
は、図７に示すように角を面落としした形状に、例え
ば、カップホイール（ホイール側面２０ａに研磨用ダイ
ヤモンドや砥石を付設してあるもの）２０によって研磨
されたものがあった。Conventionally, as this kind of heat strengthened plate glass,
Some of them have been subjected to the above-mentioned heat strengthening treatment, and the edge portion thereof has a shape with chamfered corners as shown in FIG. 7, for example, a cup wheel (a wheel side 20a is provided with a polishing diamond or grindstone attached thereto). Some were polished by 20).
【０００６】[0006]
【発明が解決しようとする課題】上述した従来の熱強化
板ガラスによれば、防火戸や防火窓として使用できるよ
うにするためには、前述の熱強化処理〔ガラスの軟化点
（７２０〜７３０℃）をかなり超える温度域（約７６０
℃）で板ガラスを加熱し、連続する空気冷却部分におい
て、背圧９５０ｍｍＡｑと非常に高い圧力で冷却空気を
吹き付けて実施される〕を実施する必要性があり、その
結果、前述の熱強化処理による不具合（ガラス表面の平
坦性に欠けたり、反りを生じて、反射映像上に障害とな
る）が生じるという問題点がある。According to the above-mentioned conventional heat-strengthened flat glass, in order to be used as a fire door or a fire-proof window, the above-mentioned heat-strengthening treatment [softening point of glass (720 to 730 [deg.] C. ) Temperature range (about 760)
It is necessary to heat the sheet glass at (° C.) And blow the cooling air at a very high back pressure of 950 mmAq in the continuous air cooling portion], and as a result, it is necessary to carry out the above-mentioned heat strengthening treatment. There is a problem that a defect (lack of flatness of the glass surface or warpage occurs, which becomes an obstacle on a reflected image).
【０００７】また、この問題点（表面不平坦・反り発
生）を解消するために、加熱温度や吹き付け空気の背圧
を従来の熱強化処理の値より低下させた熱強化処埋（以
下、単に低熱強化処理という）を実施すると、充分なエ
ッジ強度を確保できなくなり、火災や防火試験等の熱を
受けることによって板ガラスのエッジ部分、特に、研磨
してある角部に熱歪み応力が集中して破壊し易くなる。
特に、熱強化処理された板ガラスは、その端面部におい
て長手方向に引張応力が作用するが、端面部がカップホ
イールによって研磨されている場合は、研磨に伴う筋
（キズ）が板ガラスの厚み方向に形成されるため、前記
板ガラスの板面に沿って作用する応力が筋（キズ）に集
中して破壊し易くなるという新たな問題点が発生する。Further, in order to solve this problem (surface non-flatness / warpage occurrence), a heat-strengthening treatment (hereinafter, simply referred to as a heat-strengthening treatment) in which the heating temperature and the back pressure of blowing air are made lower than those of the conventional heat-strengthening treatment. If it is subjected to low heat strengthening treatment), sufficient edge strength cannot be secured, and heat strain stress concentrates on the edge part of the plate glass, especially the polished corners due to the heat of fire and fire protection test. It is easy to destroy.
In particular, heat-strengthened sheet glass is subjected to tensile stress in the longitudinal direction at its end face portion, but when the end face portion is polished by a cup wheel, streaks (scratches) associated with polishing are present in the thickness direction of the sheet glass. Since it is formed, a new problem arises that the stress acting along the plate surface of the plate glass concentrates on the streaks (scratches) and is easily broken.
【０００８】従って、本発明の目的は、上記問題点を解
消し、熱強化処理の度合いを緩和しても所定の板ガラス
のエッジ強度を確保できる熱強化板ガラス及びその端縁
部分の仕上げ方法を提供するところにある。Therefore, an object of the present invention is to solve the above-mentioned problems and provide a heat-strengthened glass plate capable of ensuring a predetermined edge strength of the glass sheet even if the degree of heat-strengthening treatment is relaxed, and a method of finishing the edge portion thereof. There is a place to do it.
【０００９】[0009]
〔構成〕本発明の第一は、全面にわたって熱強化処理を
施してある熱強化板ガラスの端面部が、その長手方向に
沿った研磨処理により形成されていると共に、前記端面
部と前記板ガラス表裏の平面部との境部が研磨処理によ
り形成されていることを特徴構成としている。[Structure] The first of the present invention is that the end face portion of the heat-strengthened glass plate that has been subjected to the heat-strengthening treatment over the entire surface is formed by a polishing treatment along its longitudinal direction, and the end face portion and the plate glass front and back sides are It is characterized in that the boundary with the flat portion is formed by polishing.
【００１０】前記本発明の第一において、前記端面部の
表面最大凹凸は０．０５ｍｍ以下に仕上げられていると
共に、前記境部の表面最大凹凸は０．００７ｍｍ以下に
仕上げられていることが好ましい。In the first aspect of the present invention, it is preferable that the surface maximum unevenness of the end face portion is finished to 0.05 mm or less and the surface maximum unevenness of the boundary portion is finished to 0.007 mm or less. .
【００１１】また、前記熱強化処理による表面圧縮応力
は１７〜２５ｋｇｆ／ｍｍ2であることが好ましい。The surface compressive stress due to the heat strengthening treatment is preferably 17 to 25 kgf / mm 2 .
【００１２】また、本発明の第二は、全面にわたって熱
強化処理が施してある熱強化板ガラスの端面部を、その
長手方向に研磨処理を行い、表面最大凹凸が０．０５ｍ
ｍ以下となるように形成する研磨工程を経て、前記端面
部と前記板ガラス表裏の平面部との境部を、表面最大凹
凸が０．００７ｍｍ以下となるように加工仕上げ工程を
実施することを特徴構成としている。According to the second aspect of the present invention, the end surface portion of the heat-strengthened sheet glass which has been heat-strengthened over its entire surface is subjected to polishing treatment in its longitudinal direction so that the maximum surface unevenness is 0.05 m.
Through a polishing step of forming the surface of the end face and the flat surface of the plate glass front and back, a finishing step is performed so that the maximum surface unevenness is 0.007 mm or less. It is configured.
【００１３】前記本発明の第二において、前記熱強化処
理による表面圧縮応力は１７〜２５ｋｇｆ／ｍｍ2であ
ることが好ましい。In the second aspect of the present invention, the surface compressive stress by the heat strengthening treatment is preferably 17 to 25 kgf / mm 2 .
【００１４】〔作用〕一般的に、板ガラス内に生じる内
部応力は、稜部に集中し易い性質があり、本発明の第一
の特徴構成によれば、全面にわたって熱強化処理を施し
てある板ガラスの端面部が、その長手方向に沿った研磨
処理により形成されていると共に、前記端面部と前記板
ガラス表裏の平面部との境部が研磨処理により形成され
ているから、端縁部分に応力が集中し難い熱強化板ガラ
スとすることができる。[Operation] Generally, the internal stress generated in the glass sheet tends to concentrate on the ridge portion, and according to the first characteristic configuration of the present invention, the glass sheet subjected to the heat strengthening treatment over the entire surface. The end face portion of the is formed by polishing treatment along the longitudinal direction, and since the boundary between the end face portion and the flat surface portions of the flat glass front and back is formed by polishing treatment, stress is applied to the edge portion. It can be a heat-strengthened flat glass that is hard to concentrate.
【００１５】また、本発明の第二の特徴構成によれば、
全面にわたって熱強化処理が施してある熱強化板ガラス
の端面部を、その長手方向に研磨処理を行い、表面最大
凹凸が０．０５ｍｍ以下となるように形成する研磨工程
を経て、前記端面部と前記板ガラス表裏の平面部との境
部を、表面最大凹凸が０．００７ｍｍ以下となるように
加工仕上げ工程を実施するから、端縁部分に応力が集中
し難い熱強化板ガラスとすることができる。According to the second characteristic configuration of the present invention,
The end face of the heat-strengthened plate glass that has been subjected to the heat-strengthening treatment over the entire surface is subjected to a polishing treatment in the longitudinal direction thereof, and the end face portion and the above-mentioned end face portion are subjected to a polishing step of forming the maximum surface unevenness to be 0.05 mm or less. Since the finishing process is performed so that the maximum unevenness of the surface is 0.007 mm or less at the boundary between the flat surface of the front and back of the glass sheet, it is possible to obtain a heat strengthened glass sheet in which stress is less likely to concentrate at the edge portion.
【００１６】つまり板ガラスの端面部は、その長手方向
に沿った研磨処理が施されているから、研磨に伴う筋
（キズ）は同様に板ガラス端面部の長手方向に沿って形
成され、板ガラスの板面に作用する熱破壊力等の集中を
回避できる。さらに、表面最大凹凸が０．０５ｍｍ以下
と、滑らかな状態に仕上げてあり、且つ、端面部には稜
部ができないから、端面部に応力が集中することを回避
することができる。また、前記端面部と前記板ガラス表
裏の平面部との境部は、表面最大凹凸が０．００７ｍｍ
以下と、より滑らかな状態に仕上げてあるから、板ガラ
ス全体としても、応力集中が起こりやすい前記稜部をな
くすことができ、板ガラス端縁部分への応力集中を回避
することが可能となり、エッジ強度を構造的に向上させ
ることができるようになる。このエッジ強度の増加は、
約４ｋｇｆ／ｍｍ2になる。That is, since the end face portion of the sheet glass is subjected to polishing treatment along the longitudinal direction thereof, streaks (scratches) due to the polishing are similarly formed along the longitudinal direction of the end face portion of the sheet glass, and the plate glass sheet It is possible to avoid concentration of thermal destructive force acting on the surface. Further, since the maximum surface unevenness is 0.05 mm or less, the surface is finished in a smooth state, and no ridge portion is formed on the end face portion, so that stress concentration on the end face portion can be avoided. In addition, the boundary between the end surface portion and the flat surface portion of the front and back of the glass sheet has a maximum surface unevenness of 0.007 mm.
Since the following is finished in a smoother state, it is possible to eliminate the ridge portion where stress concentration is likely to occur even in the whole sheet glass, and it becomes possible to avoid stress concentration on the edge portion of the sheet glass, and edge strength Can be structurally improved. This increase in edge strength is
It becomes about 4 kgf / mm 2 .
【００１７】因みに、応力集中の生じ難い平坦状であっ
ても、端面部の筋（キズ）の方向が板ガラスの厚み方向
に形成されていたり、表面最大凹凸が０．０５ｍｍを超
えて大きくなる場合には、その凹凸の谷部・山部に応力
が集中し易くなる。また、前記端面部と前記板ガラス表
裏の平面部との境部においては、面と面との変わり目で
あることから表面最大凹凸が０．００７ｍｍを超えて大
きくなる場合には、その凹凸の谷部・山部に応力が集中
し易くなる。By the way, even in the flat shape where stress concentration is unlikely to occur, the direction of the scratches on the end face is formed in the thickness direction of the plate glass, or the maximum surface irregularities become larger than 0.05 mm. The stress easily concentrates on the valleys and peaks of the unevenness. In addition, at the boundary between the end face portion and the flat surface portion of the front and back of the glass sheet, when the maximum surface unevenness becomes larger than 0.007 mm because of the transition between the surfaces, the valley portion of the unevenness is obtained.・ Stress tends to concentrate on the ridges.
【００１８】そして、上述のようにエッジ強度が増加す
れば、熱強化処理を実施するのに、従来より低い温度域
での加熱や、従来より低い圧力での空気の吹き付けによ
る熱強化処理を実施しても、所定の熱強化処理後エッジ
強度を確保することができるようになり、従来のような
ガラス表面の平坦性に欠けたり、反りを生じて、反射映
像上の不具合が発生するのを防止できる。If the edge strength increases as described above, the heat strengthening treatment is performed by heating in a lower temperature range than before or by blowing air at a lower pressure than before. Even after that, it becomes possible to secure the edge strength after the predetermined heat strengthening treatment, and it is possible to prevent defects in reflected images due to lack of flatness of the glass surface or warpage as in the past. It can be prevented.
【００１９】ところで、建設省告示第１１２５号に基づ
く防火試験での甲種及び乙種防火戸として通常の熱強化
板ガラスを使用するには、板ガラスのエッジ強度を２１
ｋｇｆ／ｍｍ2（板ガラスの支持状態として、図２に示
すように、板ガラス周縁部におけるサッシュとの係わり
深さ寸法（かかり代という）（ｄ）が１０ｍｍ程度で、
熱伝導の良好な保持金物（９）で周縁部を挟持してある
場合）以上に確保しないと前記熱割れ現象を生じる危険
性があるが、本発明によれば熱強化処理による表面圧縮
応力が１７〜２５ｋｇｆ／ｍｍ2であるから、上述の板
ガラス端縁部分の仕上げによるエッジ強度の増加分４ｋ
ｇｆ／ｍｍ2と合わせて実質的には２１〜２９ｋｇｆ／
ｍｍ2のエッジ強度を確保することができ、前記甲種及
び乙種防火戸として問題なく使用することが可能とな
る。なお、前記熱強化処理による表面圧縮応力が２５ｋ
ｇｆ／ｍｍ2を超えると、その板ガラスに付与される表
面圧縮応力が不均一になり易く不具合が生じる。By the way, in order to use a normal heat-strengthened flat glass as a Class A and Class B fire door in the fire protection test based on Ministry of Construction Notification No. 1125, the edge strength of the plate glass is set to 21.
kgf / mm 2 (As a supporting state of the plate glass, as shown in FIG. 2, the depth of engagement with the sash (referred to as the margin) (d) at the periphery of the plate glass is about 10 mm,
There is a risk that the above-mentioned thermal cracking phenomenon may occur unless the peripheral portion is sandwiched between the holding hardware (9) having good heat conduction). However, according to the present invention, the surface compressive stress due to the heat strengthening treatment is Since it is 17 to 25 kgf / mm 2 , the increase in edge strength due to the finishing of the edge portion of the plate glass is 4 k.
Substantially 21 to 29 kgf / including gf / mm 2
Since the edge strength of mm 2 can be secured, it can be used as the above-mentioned type A and type B fire doors without any problem. The surface compressive stress due to the heat strengthening treatment is 25 k.
If it exceeds gf / mm 2 , the surface compressive stress applied to the plate glass tends to be non-uniform, causing a problem.
【００２０】また、前記かかり代（ｄ）を１５ｍｍ程度
にして板ガラスが支持されている場合には、板ガラスの
周縁部と中央部との温度差が多少大きくなるので、表面
圧縮応力は、１８ｋｇｆ／ｍｍ2以上必要となる。ま
た、前記かかり代（ｄ）を１５ｍｍ程度で、且つ、前記
保持金物（９）を使用しない支持状態（図３参照）にお
いては、表面圧縮応力は２２ｋｇｆ／ｍｍ2以上必要と
なる。すなわち、上述の何れの支持状態においても、前
記甲種及び乙種防火戸として問題なく使用することが可
能となる。Further, when the plate glass is supported with the clearance (d) of about 15 mm, the temperature difference between the peripheral portion and the central portion of the plate glass becomes a little large, so that the surface compressive stress is 18 kgf / mm 2 or more is required. Further, in the supporting state (see FIG. 3) where the barring allowance (d) is about 15 mm and the holding metal (9) is not used, the surface compressive stress needs to be 22 kgf / mm 2 or more. That is, in any of the above supporting states, it can be used as the above-mentioned type A and type B fire doors without any problem.
【００２１】なお、前記仕上げ工程は、バフ磨きによっ
て実施すれば、研磨表面の凹凸を数μｍオーダーに磨き
上げることができ、研磨によって前記境部に大きな研磨
溝が発生するのを防止でき、研磨溝への板ガラスへの応
力集中を抑えて、より板ガラスのエッジ強度を増加させ
ることができる。If the finishing step is carried out by buffing, the unevenness of the polishing surface can be polished up to the order of several μm, and it is possible to prevent the generation of large polishing grooves at the boundary due to polishing. It is possible to suppress the stress concentration on the plate glass in the groove and further increase the edge strength of the plate glass.
【００２２】また、前記仕上げ工程は、加熱溶融によっ
て実施すれば、前記仕上げ工程による仕上げ面を板ガラ
ス表面と同様に仕上げることができ、より板ガラスのエ
ッジ強度を増加させることが可能となる。If the finishing step is carried out by heating and melting, the finished surface of the finishing step can be finished in the same manner as the surface of the plate glass, and the edge strength of the plate glass can be further increased.
【００２３】また、前記仕上げ工程は、化学的な溶解に
よって実施すれば、仕上げ工程そのものを簡単な作業手
順によって実施することが可能となり、板ガラス端縁部
分の仕上げ作業の効率を向上させることができる。If the finishing step is carried out by chemical melting, the finishing step itself can be carried out by a simple work procedure, and the finishing work efficiency of the edge portion of the glass sheet can be improved. .
【００２４】〔発明の効果〕従って、本発明の第一の熱
強化板ガラスによれば、従来より簡便な方法によって板
ガラスを熱強化処理しても、防火ガラスとしての性能を
維持させることができるようになり、板ガラスとしての
品質向上、及び、熱強化処理設備の稼動コスト低減を図
ることが可能となる。[Effect of the Invention] Therefore, according to the first heat-strengthened glass plate of the present invention, the performance as a fireproof glass can be maintained even if the glass plate is heat-strengthened by a simpler method than in the past. Therefore, it becomes possible to improve the quality of the plate glass and reduce the operating cost of the heat strengthening treatment equipment.
【００２５】また、本発明の第二の熱強化板ガラス端縁
部分の仕上げ方法によれば、板ガラス端縁部分へ内部応
力が集中的に作用するのを防止し易くなって、板ガラス
のエッジ強度を従来より増加させることが可能となり、
それに伴って、従来より簡便な方法によって板ガラスを
熱強化処理しても、防火ガラスとしての性能を維持させ
ることができるようになり、板ガラスとしての品質向
上、及び、熱強化処理設備の稼働コスト低減をも図るこ
とが可能となる。Further, according to the second method for finishing the edge portion of the heat-strengthened glass sheet of the present invention, it is easy to prevent concentrated internal stress from acting on the edge portion of the glass sheet, and the edge strength of the glass sheet is improved. It is possible to increase than before,
Along with that, even if the plate glass is heat-strengthened by a simpler method than before, the performance as a fireproof glass can be maintained, the quality of the plate glass is improved, and the operating cost of the heat-strengthening treatment facility is reduced. It is possible to
【００２６】[0026]
【発明の実施の形態】以下に、本発明の実施形態を図面
に基づいて説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００２７】〔第一の実施形態〕図２は、サッシュ
（１）に対して、本発明の熱強化板ガラスの一実施形態
である板ガラス（３）の端縁部分（２）を嵌めて構成し
てある防火戸（４）を示すものである。[First Embodiment] FIG. 2 shows a sash (1) in which an edge portion (2) of a glass sheet (3) which is an embodiment of the heat-strengthened glass sheet of the present invention is fitted. The fire door (4) is shown.
【００２８】前記サッシュ（１）は、戸枠部分を形成す
る環状のサッシュ本体（５）を設け、前記板ガラス
（３）をサッシュ本体（５）に保持するための保持部
（６）を、前記サッシュ本体（５）の枠内周部分に着脱
自在に設けて構成してある。前記サッシュ本体（５）、
及び、保持部〈６）は、共に金属で形成してあり、火災
が発生しても前記板ガラス（３）を保持できることを考
慮して形成してある。前記保持部（６）は、一対のアン
グル部材で構成してあり、夫々の間に前記板ガラス
（３）の端縁部分（２）を保持できる隙間（７）を形成
できる状態に前記サッシュ本体（５）に取り付けてあ
る。The sash (1) is provided with an annular sash body (5) which forms a door frame portion, and a holding portion (6) for holding the plate glass (3) on the sash body (5), The sash body (5) is detachably provided on the inner peripheral portion of the frame. The sash body (5),
The holding part <6) is made of metal, and is formed in consideration of being able to hold the plate glass (3) even if a fire occurs. The holding portion (6) is composed of a pair of angle members, and the sash body () is formed in a state in which a gap (7) capable of holding the edge portion (2) of the plate glass (3) can be formed therebetween. It is attached to 5).
【００２９】また、前記隙間（７）には、前記板ガラス
（３）の端縁保護の機能を備えたクロロプレンゴム製の
セッティングブロック（前記サッシュ（１）の下辺の隙
間（７）にのみ設置）（８）と、前記板ガラス（３）の
端縁部分（２）を挟持して保持部（６）に固定する保持
金物（９）とを設けてある。In the gap (7), a setting block made of chloroprene rubber having a function of protecting the edge of the plate glass (3) (installed only in the gap (7) on the lower side of the sash (1)). (8) and a holding metal (9) for holding the edge portion (2) of the plate glass (3) and fixing it to the holding portion (6) are provided.
【００３０】前記保持金物（９）は、金属製の薄板部材
によって形成してあり、前記隙間（７）に板ガラス
（３）を位置させることによって、前記端縁部分（２）
を弾性的に挟み込み固定できるように形成してある。具
体的には、板ガラス（３）の端縁部分（２）のほぼ全長
にわたる長さ寸法に形成してあり、図に示すように、前
記端縁部分（２）の長手方向視における断面形状が、角
張った『Ｕ』の字形状（六角形図形の上の一辺をなくし
た形状）で、前記『Ｕ』の字の両端部が板ガラス（３）
の表裏面に各別に線接当するように形成してある。外径
寸法は、前記隙間（７）の幅寸法より大きく形成してあ
り、前記板ガラス（３）の端縁部分（２）を挟んだ状態
で前記隙間（７）に設置することによって、前記保持部
（６）から挟持方向の抑圧力を受けて前記板ガラス
（３）を強力に挟持固定することができ、火災時の板ガ
ラス（３）の熱変形によるガラス周縁部分の外れを防止
することができる。The holding metal (9) is formed of a thin metal plate member, and the plate glass (3) is positioned in the gap (7), whereby the edge portion (2) is formed.
Is formed so as to be elastically sandwiched and fixed. Specifically, the edge portion (2) of the plate glass (3) is formed to have a length dimension substantially over the entire length, and as shown in the figure, the cross-sectional shape of the edge portion (2) in a longitudinal direction is as follows. , A square "U" shape (a shape in which one side of the hexagonal shape is removed), and both ends of the "U" shape are flat glass (3)
It is formed so as to be in line contact with the front and back surfaces of each. The outer diameter dimension is formed larger than the width dimension of the gap (7), and the holding is performed by installing the plate glass (3) in the gap (7) with the edge portion (2) sandwiched therebetween. The plate glass (3) can be strongly clamped and fixed by receiving a pressing force in the clamping direction from the portion (6), and detachment of the glass peripheral portion due to thermal deformation of the plate glass (3) at the time of fire can be prevented. .
【００３１】なお、保持金物（９）は、金属（例えば、
鉄やステンレス鋼）によって形成してあるから、環境温
度に速やかに馴染み易く、例えば、火災が発生した場合
に、保持している前記板ガラス（３）の周縁部にも熱が
伝わり易くして周縁部と中央部との温度差が生じ難い状
態を作り出し、破壊し難くすることが可能となる。この
板ガラス（３）の破壊し難さを、エッジに発生する応力
に換算すると、図に示す保持部（６）に対する板ガラス
（３）のかかり代（ｄ）が１５ｍｍ程度の通常の保持状
態においては、約２２ｋｇｆ／ｍｍ2の応力が発生す
る。但し、前記かかり代（ｄ）が１０ｍｍ程度の浅い保
持状態においては、板ガラス（３）の中央部と端縁部分
の温度差が小さくなることから、約１ｋｇｆ／ｍｍ2ほ
ど発生する応力が緩和されて約２１ｋｇｆ／ｍｍ2とな
る。The holding hardware (9) is made of metal (for example,
Since it is made of iron or stainless steel, it easily adapts to the ambient temperature, and for example, when a fire occurs, heat is easily transferred to the peripheral portion of the plate glass (3) that is being held, so It is possible to create a state in which a temperature difference between the central portion and the central portion is unlikely to occur and to make it difficult to destroy. Converting the breakage resistance of the plate glass (3) into the stress generated at the edge, in a normal holding state in which the margin (d) of the plate glass (3) with respect to the holding portion (6) shown in the figure is about 15 mm. A stress of about 22 kgf / mm 2 is generated. However, in the shallow holding state where the engagement margin (d) is about 10 mm, the temperature difference between the central portion and the edge portion of the plate glass (3) becomes small, so that the stress generated by about 1 kgf / mm 2 is relaxed. To about 21 kgf / mm 2 .
【００３２】次に、板ガラス（３）について説明する。
前記板ガラス（３）は、ソーダ石灰系の板ガラスを、後
述する端縁部分の仕上げ工程を経てから、吊り金具を使
用しない製法で熱強化処理を施して形成してある。Next, the plate glass (3) will be described.
The plate glass (3) is formed by subjecting soda-lime plate glass to a heat strengthening treatment by a manufacturing method that does not use hanging fittings after a finishing step of an edge portion described later.
【００３３】前記板ガラス（３）は、端面部（３ａ）を
板ガラス（３）の厚み方向での中間部ほど、板ガラス
（３）の面方向の外方に突出する曲面形状となるように
研磨処理（研磨された面の最大凹凸は０．０５ｍｍ以
下）を行う研磨工程を経て、前記端面部（３ａ）と前記
板ガラス（３）表裏の平面部（３ｂ）との境部（３ｃ）
を、前記研磨工程よりさらに滑らか（仕上げ面の最大凹
凸は０．００７ｍｍ以下）に加工仕上げ工程を実施して
端縁部分の仕上げを行ってある。The plate glass (3) is polished so that the end surface portion (3a) has a curved shape protruding outward in the plane direction of the plate glass (3) toward the middle portion in the thickness direction of the plate glass (3). A boundary portion (3c) between the end surface portion (3a) and the flat surface portions (3b) on the front and back surfaces of the plate glass (3) is subjected to a polishing step (the maximum unevenness of the polished surface is 0.05 mm or less).
In addition, the processing and finishing step is performed to make the end edge portion smoother than the polishing step (the maximum unevenness of the finished surface is 0.007 mm or less).
【００３４】具体的には、前記研磨工程は、図１（イ）
に示すように、軸心廻りに回転する円筒ホイール（１
０）の外周面を使って研磨する平廻り円筒ホイール型研
磨方式の研磨方法によって実施するもので、前記円筒ホ
イール（１０）は、軸心方向での中間部ほど外径寸法が
小径になるようにその外周面を形成してあり、被研磨部
分となる板ガラス（３）の端面部（３ａ）が、外方に突
出した曲面形状に研磨されるように構成してある。そし
て、前記円筒ホイール（１０）の外周面は、＃２００番
手より細かな研磨部に形成してある。Specifically, the polishing step is performed as shown in FIG.
As shown in, the cylindrical wheel (1
0) is performed by a polishing method of a flat-faced cylindrical wheel type polishing method in which the outer peripheral surface of 0) is used. The cylindrical wheel (10) has a smaller outer diameter toward an intermediate portion in the axial direction. The outer peripheral surface of the plate glass (3) is formed so that the end surface portion (3a) of the plate glass (3), which is the portion to be polished, is polished into a curved shape protruding outward. The outer peripheral surface of the cylindrical wheel (10) is formed into a finer polishing portion than # 200.
【００３５】この研磨工程において研磨処理が施された
前記端面部（３ａ）は、表面の凹凸が０．０３ｍｍ程度
に仕上げられており、非常に細かな凹凸であるから、板
ガラス（３）の内部応力が集中的に作用するのを避け易
くなる。The end surface portion (3a) which has been subjected to the polishing treatment in this polishing step has a surface unevenness of about 0.03 mm, which is a very fine unevenness, so that the inside of the plate glass (3) is It becomes easy to avoid the concentrated action of stress.
【００３６】さらには、研磨工程での研磨方向は、板ガ
ラス（３）の端面部（３ａ）の長手方向に沿って設定し
てあるから、研磨に伴う筋（キズ）は、同様に端面部
（３ａ）の長手方向に沿って形成され、このため板ガラ
ス（３）の板面に沿って作用する熱破壊力等の集中を回
避し易くなる。Further, since the polishing direction in the polishing step is set along the longitudinal direction of the end face portion (3a) of the plate glass (3), the streaks (scratches) associated with the polishing are similarly set on the end face portion (3). 3a) is formed along the longitudinal direction of the glass plate 3a), so that it becomes easy to avoid concentration of thermal destructive force acting along the plate surface of the plate glass (3).
【００３７】前記仕上げ工程は、図１（ロ）に示すよう
に、二軸の回転軸に張り廻されて回転する研磨用ベルト
（１１）の外周面を使って研磨するバフ磨き方式の研磨
方法によって実施するものである。このバフ磨きとは、
極上仕上げとも呼ばれ、一般的には、羊の皮で形成した
ベルト（１１）で研磨し、その研磨に際しては、酸化セ
リウム（非常に細かい粒度の研磨粉）の水溶液を被研磨
部分に掛けながら実施することによって、表面粗さが３
〜７μｍ（殆ど板ガラス表裏面の表面粗さと等しい値）
にまで細かくなり、ツヤを出すことも可能で、前記境部
（３ｃ）への内部応力の集中が起こり難くすることがで
きる。これを強度に換算すると、約４ｋｇｆ／ｍｍ2ほ
どである。As shown in FIG. 1 (b), the finishing step is a buffing type polishing method in which polishing is performed by using the outer peripheral surface of a polishing belt (11) which is stretched around two rotating shafts and rotates. It is carried out by. What is this buff polishing?
Also called the finest finish, it is generally ground with a belt (11) made of sheep skin, and at the time of polishing, while applying an aqueous solution of cerium oxide (abrasive powder of very fine grain size) to the part to be polished. By carrying out, the surface roughness is 3
~ 7 μm (value almost equal to the surface roughness of the front and back surfaces of plate glass)
It becomes even finer and can be glossed, and the concentration of internal stress on the boundary (3c) can be made difficult to occur. When converted into strength, it is about 4 kgf / mm 2 .
【００３８】前記研磨工程、及び仕上げ工程によって、
板ガラス（３）の端縁部分（２）に内部応力が集中し難
くすることができ、特に、板ガラス（３）の板面に沿っ
て作用する内部応力の集中を回避し易くなる。その結
果、火災による熱を受けても破壊し難くすることが可能
となり、熱強化処理によって施される応力に換算して約
４ｋｇｆ／ｍｍ2ほど応力緩和できることが確認されて
いる。By the polishing step and the finishing step,
Internal stress can be made hard to concentrate on the edge portion (2) of the plate glass (3), and in particular, concentration of internal stress acting along the plate surface of the plate glass (3) can be easily avoided. As a result, it has been confirmed that it is possible to make it difficult to break even if it receives heat from a fire, and it is possible to relax the stress by about 4 kgf / mm 2 in terms of the stress applied by the heat strengthening treatment.
【００３９】例えば、建設省告示第１１２５号に基づく
防火試験での甲種及び乙種防火戸として板ガラスを使用
するには、板ガラスのエッジ強度を２６ｋｇｆ／ｍｍ2
（前記かかり代（ｄ）が１５ｍｍ程度の場合）以上に確
保する必要があるが、本実施形態の板ガラス（３）によ
れば、前記保持金物（９）による保持に伴って４ｋｇｆ
／ｍｍ2、端縁部分（２）の仕上げに伴って約４ｋｇｆ
／ｍｍ2のエッジ強度を確保することができるから、熱
強化処理によって最低１８ｋｇｆ／ｍｍ2の強化を図る
だけでよくなる。また、前記かかり代（ｄ）が１０ｍｍ
程度の浅い保持状態においては、板ガラス（３）の中心
部と周縁部との温度差が多少減少することによって発生
熱応力も減少し、熱強化処理によって最低１７ｋｇｆ／
ｍｍ2の強化を図ればよくなる。For example, in order to use flat glass as a Class A and Class B fire door in a fire protection test based on Ministry of Construction Notification No. 1125, the edge strength of the flat glass is 26 kgf / mm 2.
It is necessary to ensure the above (when the engagement margin (d) is about 15 mm) or more, but according to the plate glass (3) of the present embodiment, 4 kgf is accompanied by the holding by the holding hardware (9).
/ Mm 2 , about 4 kgf with finishing of the edge (2)
Since the edge strength of / mm 2 can be secured, it is sufficient to strengthen at least 18 kgf / mm 2 by the heat strengthening treatment. In addition, the starting margin (d) is 10 mm
In a shallow holding state, the thermal stress generated is reduced due to a slight decrease in the temperature difference between the central portion and the peripheral portion of the plate glass (3), and at least 17 kgf /
It can be improved by strengthening mm 2 .
【００４０】従って、当該板ガラス（３）の熱強化処理
においては、従来のように、板ガラス（３）の加熱温度
７６０℃、冷却空気吹き付けの際のノズルからの背圧９
５０ｍｍＡｑという仕様で実施しなくても、例えば、加
熱温度は、ガラスの軟化点（７２０〜７３０℃）以下、
冷却空気吹き付け背圧５００ｍｍＡｑで実施しても、所
定のエッジ強度を確保することができるようになり、熱
強化処理に伴う板ガラスの品質の低下（ガラス表面の平
坦性に欠けたり、反りを生じる）を防止して、歩留まり
をよくすることができると共に、熱強化処理設備の稼動
コストの低減をも図ることが可能となる。Therefore, in the heat strengthening treatment of the plate glass (3), the heating temperature of the plate glass (3) is 760 ° C. and the back pressure from the nozzle at the time of blowing the cooling air is 9 as in the conventional case.
Even if it is not performed with the specification of 50 mmAq, for example, the heating temperature is the softening point of glass (720 to 730 ° C.) or lower,
Even if it is carried out with a cooling air blowing back pressure of 500 mmAq, it becomes possible to secure a predetermined edge strength, and the quality of the sheet glass deteriorates due to the heat strengthening treatment (the glass surface lacks flatness or warps). It is possible to prevent the above, improve the yield, and reduce the operating cost of the heat strengthening treatment equipment.
【００４１】なお、板ガラス（３）のエッジ強度（表面
圧縮応力）の測定は、全反射応力測定方法により行っ
た。全反射応力測定方法は、被測定板ガラス表面にこれ
より屈折率の僅かに大きいプリズムを置き、被測定点に
集束する円偏光光束を全反射臨界角にほぼ等しい角度で
入射させて、反射光観察望遠鏡の視野に現れる明暗の全
反射境界線間のずれ量を既知応力により較正した目盛り
で測定する方法によって実施した。The edge strength (surface compressive stress) of the plate glass (3) was measured by the total reflection stress measuring method. The total reflection stress measurement method is to place a prism with a slightly larger refractive index on the surface of the glass plate to be measured, and make a circularly polarized light beam that converges at the measurement point incident at an angle almost equal to the critical angle for total reflection, and observe the reflected light. It was carried out by the method of measuring the shift amount between the light and dark total reflection boundary lines appearing in the field of view of the telescope with a scale calibrated by known stress.
【００４２】〔第二の実施形態〕図３に示すように、前
記保持金物（９）を使用せずに、板ガラス（３）と保持
部（６）との間の前記隙間（７）に、セラミックスロー
プ（Ｓ１）やセラミックスペーパー（Ｓ２）を詰め込ん
で板ガラス（３）を保持する保持構造においては、前記
かかり代（ｄ）が１５ｍｍ程度の通常の保持状態におい
ては、前述の板ガラス（３）の端縁部分（２）の仕上げ
に伴って約４ｋｇｆ／ｍｍ2のエッジ強度を確保するこ
とができるから、熱強化処理によって最低２２ｋｇｆ／
ｍｍ2の強化を図るだけでよくなる。また、前記かかり
代（ｄ）が１０ｍｍ程度の浅い保持状態においては、板
ガラス（３）の中心部と周縁部との温度差が多少減少す
ることによって発生熱応力も減少し、熱強化処理によっ
て最低２０ｋｇｆ／ｍｍ2の強化を図ればよくなる。[Second Embodiment] As shown in FIG. 3, without using the holding metal object (9), in the gap (7) between the plate glass (3) and the holding portion (6), In the holding structure in which the ceramic glass (S1) or the ceramic paper (S2) is packed to hold the plate glass (3), the above-mentioned plate glass (3) is held in a normal holding state where the barring allowance (d) is about 15 mm. Since it is possible to secure an edge strength of about 4 kgf / mm 2 with the finishing of the edge portion (2), a minimum of 22 kgf /
It only needs to be strengthened by mm 2 . Further, in the shallow holding state where the engagement margin (d) is about 10 mm, the thermal stress generated is also reduced by the temperature difference between the central portion and the peripheral portion of the plate glass (3) being somewhat reduced, and the thermal strengthening treatment minimizes the thermal stress. It should be strengthened to 20 kgf / mm 2 .
【００４３】〔別実施形態〕以下に、別実施例を説明す
る。[Other Embodiment] Another embodiment will be described below.
【００４４】〈１〉 前記仕上げ工程は、先の実施形態
で説明したバフ磨き方式の研磨方法に限定されるもので
はなく、例えば、前記研磨工程と同様に平廻り円筒ホイ
ール型研磨方式による研磨方法（図６）や、カップホイ
ール（ホイール面に研磨用ダイヤモンドや砥石を付設し
てあるもの）を用いた研磨方式との併用や、板ガラス
（３）の端縁部分（２）の局部的な加熱溶融によって実
施したり、または、化学的な溶解によって実施するもの
であってもよい。要するに、端面部（３ａ）の表面最大
凹凸が０．０５ｍｍ以下、前記境部（３ｃ）は表面最大
凹凸が０．００７ｍｍ以下に仕上げてあればよい。<1> The finishing step is not limited to the buffing-type polishing method described in the previous embodiment. For example, the polishing method using the flat rotation cylindrical wheel type polishing method is similar to the polishing step. (Fig. 6) or a polishing method using a cup wheel (having a diamond or grindstone attached to the wheel surface), and locally heating the edge portion (2) of the plate glass (3) It may be performed by melting or may be performed by chemical dissolution. In short, the surface maximum irregularities of the end face portion (3a) should be 0.05 mm or less, and the boundary portions (3c) should be 0.007 mm or less.
【００４５】〈２〉 前記板ガラス（３）の端面部（３
ａ）は、板ガラス（３）の厚み方向での中間部ほど、板
ガラス（３）の面方向の外方に突出する曲面形状とした
先の実施形態に限定されるものではなく、平坦形状とし
てもよい。要するに、端面部（３ａ）がその長手方向に
沿った研磨処理により形成されており、表面最大凹凸が
０．０５ｍｍ以下に仕上げてあればよい。<2> The end face portion (3) of the plate glass (3)
a) is not limited to the above-described embodiment in which the curved shape is formed so as to protrude outward in the plane direction of the plate glass (3) toward the middle portion in the thickness direction of the plate glass (3), and may be a flat shape. Good. In short, it suffices that the end face portion (3a) is formed by polishing treatment along the longitudinal direction thereof and the maximum surface unevenness is finished to 0.05 mm or less.
【００４６】〈３〉 板ガラス（３）と、サッシュ本体
（５）との取り付けは、先の実施形態に限定されるもの
ではなく、例えば図４に示すように、使用する保持金物
として、サッシュ本体（５）と面接触する金属製の弾性
保持金物（９ａ）を使用して固定すれば、サッシユ本体
（５）への輻射熱を、前記保持金物（９ａ）から板ガラ
ス（３）の周縁部に効率よく伝達することができ、板ガ
ラス（３）の中央部と周縁部との温度差を少なくして、
破壊し難くすることが可能となる。また、取り付け状態
の他の実施形態としては、図５に示すように、サッシュ
本体（５）の押縁（５ａ）に嵌合する金属製の弾性保持
金物（９ｂ）と、不燃製板（例えば、ケイカル板）によ
って挟持固定するものであってもよい。<3> The attachment of the plate glass (3) and the sash body (5) is not limited to the above embodiment. For example, as shown in FIG. If fixed using an elastic holding metal object (9a) made of metal that comes into surface contact with (5), radiant heat to the sash body (5) can be efficiently transferred from the holding metal object (9a) to the peripheral portion of the glass sheet (3). It can be transmitted well, reducing the temperature difference between the central part and the peripheral part of the plate glass (3),
It is possible to make it difficult to destroy. Further, as another embodiment of the attached state, as shown in FIG. 5, a metal elastic holding metal (9b) fitted to the ridge (5a) of the sash body (5) and a non-combustible plate (for example, It may be sandwiched and fixed by a calcareous plate).
【００４７】なお、特許請求の範囲の項に、図面との対
照を便利にするために符号を記すが、該記入により本発
明は添付図面の構成に限定されるものではない。It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.
【図１】熱強化板ガラス端縁部の仕上げ方法を示す説明
図FIG. 1 is an explanatory view showing a method for finishing an edge portion of a heat-strengthened glass plate.
【図２】第一実施形態の防火戸を示す要部の断面図FIG. 2 is a sectional view of an essential part showing a fire door of the first embodiment.
【図３】第二実施形態の防火戸を示す要部の断面図FIG. 3 is a sectional view of a main part showing a fire door of a second embodiment.
【図４】別実施例の板ガラス取り付け状況を示す断面図FIG. 4 is a cross-sectional view showing how a plate glass of another embodiment is attached.
【図５】別実施例の板ガラス取り付け状況を示す断面図FIG. 5 is a cross-sectional view showing another example of mounting glass sheets.
【図６】別実施例の仕上げ工程を示す説明図FIG. 6 is an explanatory view showing a finishing process of another embodiment.
【図７】従来例の熱強化板ガラスを示す説明図FIG. 7 is an explanatory diagram showing a conventional heat-strengthened glass plate.
３ 板ガラス ３ａ 端面部 ３ｂ 平面部 ３Ｃ 境部 3 plate glass 3a end face part 3b plane part 3C boundary part
Claims (5)
熱強化板ガラスであつて、 前記板ガラス（３）の端面部（３ａ）が、その長手方向
に沿った研磨処理により形成されていると共に、前記端
面部（３ａ）と前記板ガラス（３）表裏の平面部（３
ｂ）との境部（３ｃ）が研磨処理により形成されている
ことを特徴とする熱強化板ガラス。1. A heat-strengthened glass plate which has been subjected to a heat-strengthening treatment over the entire surface, wherein an end face portion (3a) of the plate glass (3) is formed by a polishing treatment along its longitudinal direction, and The end face part (3a) and the flat part (3
A heat-strengthened glazing, characterized in that the boundary (3c) with b) is formed by a polishing treatment.
０．０５ｍｍ以下に仕上げられていると共に、前記境部
（３ｃ）の表面最大凹凸が０．００７ｍｍ以下に仕上げ
られている請求項１に記載の熱強化板ガラス。2. The surface maximum unevenness of the end face portion (3a) is finished to 0.05 mm or less, and the maximum surface unevenness of the boundary portion (3c) is finished to 0.007 mm or less. Heat-strengthened flat glass as described in.
７〜２５ｋｇｆ／ｍｍ2である請求項１に記載の熱強化
板ガラス。3. The surface compressive stress due to the heat strengthening treatment is 1
The heat-strengthened glazing according to claim 1, having a weight of 7 to 25 kgf / mm 2 .
熱強化板ガラス端縁部分の仕上げ方法であって、 板ガラス（３）の端面部（３ａ）を、その長手方向に沿
って研磨処理を行い、表面最大凹凸が０．０５ｍｍ以下
となるように形成する研磨工程を経て、前記端面部（３
ａ）と前記板ガラス（３）表裏の平面部（３ｂ）との境
部（３ｃ）を、表面最大凹凸が０．００７ｍｍ以下とな
るように加工仕上げ工程を実施することを特徴とする熱
強化板ガラス端縁部分の仕上げ方法。4. A method of finishing an edge portion of a heat-strengthened sheet glass which has been subjected to a heat-strengthening treatment over the entire surface, wherein an end surface portion (3a) of the sheet glass (3) is subjected to a polishing treatment along its longitudinal direction, After the polishing step for forming the maximum surface unevenness of 0.05 mm or less, the end surface portion (3
The heat-strengthened glass plate is characterized in that the boundary portion (3c) between the flat surface (3b) on the front and back of the plate glass (3) is processed and finished so that the maximum unevenness on the surface is 0.007 mm or less. How to finish the edge.
７〜２５ｋｇｆ／ｍｍ2である請求項４に記載の熱強化
板ガラス端縁部分の仕上げ方法。5. The surface compressive stress due to the heat strengthening treatment is 1
It is 7-25 kgf / mm < 2 >, The finishing method of the edge part of the heat strengthened sheet glass of Claim 4.
Priority Applications (12)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08953796A JP3308446B2 (en) | 1996-04-11 | 1996-04-11 | Heat-strengthened glass sheet and method for finishing edge portion thereof |
| AT97914623T ATE199887T1 (en) | 1996-04-11 | 1997-04-07 | THERMALLY HARDENED GLASS PANELS AND METHOD FOR FINISHING THEIR EDGES |
| CNB200310114229XA CN1204070C (en) | 1996-04-11 | 1997-04-07 | Heat reinforcing sheet glass |
| KR1019970709263A KR100373414B1 (en) | 1996-04-11 | 1997-04-07 | How to Finish Thermo-Tempered Glass and Edges |
| EP97914623A EP0842904B1 (en) | 1996-04-11 | 1997-04-07 | Thermally tempered flat glass and method of finishing edge portions of the same |
| CNB971906343A CN1154619C (en) | 1996-04-11 | 1997-04-07 | Thermally tempered flat glass and method of finishing edge portion of the same |
| PCT/JP1997/001188 WO1997037947A1 (en) | 1996-04-11 | 1997-04-07 | Thermally tempered flat glass and method of finishing edge portions of the same |
| US08/981,129 US5939175A (en) | 1996-04-11 | 1997-04-07 | Method of finishing heat-reinforced plate glass and edge regions thereof |
| DE1997604325 DE69704325T2 (en) | 1996-04-11 | 1997-04-07 | THERMALLY HARDENED GLASS PANELS AND METHOD FOR FINISHING THEIR WHEELS |
| TW86104544A TW453980B (en) | 1996-04-11 | 1997-04-09 | Heat-tempered sheet glass and method of finishing edge thereof |
| MYPI97001594A MY118238A (en) | 1996-04-11 | 1997-04-11 | Method of finishing heat-reinforced plate glass and edge regions thereof |
| HK98112167A HK1016957A1 (en) | 1996-04-11 | 1998-11-20 | Thermally tempered flat glass and method of finishing edge portions of the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08953796A JP3308446B2 (en) | 1996-04-11 | 1996-04-11 | Heat-strengthened glass sheet and method for finishing edge portion thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09278466A true JPH09278466A (en) | 1997-10-28 |
| JP3308446B2 JP3308446B2 (en) | 2002-07-29 |
Family
ID=13973573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08953796A Expired - Lifetime JP3308446B2 (en) | 1996-04-11 | 1996-04-11 | Heat-strengthened glass sheet and method for finishing edge portion thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3308446B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002012436A (en) * | 2000-06-23 | 2002-01-15 | Nippon Sheet Glass Co Ltd | Method of treating glass plate end and plate glass treated thereby |
| JP2011241126A (en) * | 2010-05-20 | 2011-12-01 | Nippon Electric Glass Co Ltd | Glass substrate and method for manufacturing the same |
| KR20110139188A (en) | 2009-03-10 | 2011-12-28 | 니폰 덴키 가라스 가부시키가이샤 | Glass substrate and method for manufacturing same |
| JP2012254624A (en) * | 2011-05-13 | 2012-12-27 | Nippon Electric Glass Co Ltd | Laminate and manufacturing method of laminate |
| US9446566B2 (en) | 2011-05-13 | 2016-09-20 | Nippon Electric Glass Co., Ltd. | Laminate, method for cutting laminate, method for processing laminate, and device and method for cutting brittle plate-like object |
-
1996
- 1996-04-11 JP JP08953796A patent/JP3308446B2/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002012436A (en) * | 2000-06-23 | 2002-01-15 | Nippon Sheet Glass Co Ltd | Method of treating glass plate end and plate glass treated thereby |
| KR20110139188A (en) | 2009-03-10 | 2011-12-28 | 니폰 덴키 가라스 가부시키가이샤 | Glass substrate and method for manufacturing same |
| JP2011241126A (en) * | 2010-05-20 | 2011-12-01 | Nippon Electric Glass Co Ltd | Glass substrate and method for manufacturing the same |
| JP2012254624A (en) * | 2011-05-13 | 2012-12-27 | Nippon Electric Glass Co Ltd | Laminate and manufacturing method of laminate |
| JP2012254625A (en) * | 2011-05-13 | 2012-12-27 | Nippon Electric Glass Co Ltd | Laminate |
| US9446566B2 (en) | 2011-05-13 | 2016-09-20 | Nippon Electric Glass Co., Ltd. | Laminate, method for cutting laminate, method for processing laminate, and device and method for cutting brittle plate-like object |
| US10279568B2 (en) | 2011-05-13 | 2019-05-07 | Nippon Electric Glass Co., Ltd. | Laminate, method for cutting laminate, method for processing laminate, and device and method for cutting brittle plate-like object |
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| Publication number | Publication date |
|---|---|
| JP3308446B2 (en) | 2002-07-29 |
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