JPH047158Y2

JPH047158Y2 -

Info

Publication number: JPH047158Y2
Application number: JP1985202217U
Authority: JP
Priority date: 1985-12-25
Filing date: 1985-12-25
Publication date: 1992-02-26
Also published as: JPS62106939U

Description

【考案の詳細な説明】（産業上の利用分野）本考案は加熱炉内等においてガラス板の深曲げ
部分を局部的に加熱する局部加熱装置に関する。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a local heating device for locally heating a deeply bent portion of a glass plate in a heating furnace or the like.

（従来の技術）一般に曲げガラスを成形するには、ガラスの軟
化点近くの温度に保持された加熱炉内に、金型に
載置した状態でガラス板を搬入し、ガラス板の自
重によつて曲げ成形したり、或いはローラによつ
てガラス板を加熱炉内を通過させ、その後プレス
により型形状に倣つてガラス板を曲げ成形するよ
うにしている。(Prior art) Generally, to form bent glass, a glass plate placed in a mold is placed in a heating furnace maintained at a temperature close to the glass's softening point, and the glass plate's own weight is used to form the glass. Alternatively, the glass plate is passed through a heating furnace using rollers, and then the glass plate is bent using a press to follow the shape of the mold.

ところで、自動車のウインドガラス等にあつて
は、局部的に深曲げ形状、例えば15〜30R程度に
曲げなければならないことがあり、この場合深曲
げ部分を他の部分と同等に加熱していたのでは精
度良く曲げることができない。 By the way, in the case of automobile window glasses, etc., there are cases where it is necessary to bend the parts into a deeply bent shape, for example, about 15 to 30R. It is not possible to bend it accurately.

そこで、特公昭57−21496号公報等にガラス板
の深曲げ部分等を他の部分よりも局部的に加熱す
る装置が提案されている。 Therefore, a device has been proposed in Japanese Patent Publication No. 57-21496, etc., which heats the deeply bent portions of the glass plate more locally than other portions.

この装置は第９図及び第１０図に示すように、
カウンタウエイト１００を取付けた金型１０１に
ヒータ１０２を固定し、このヒータ１０２を加熱
用スリツト１０３を形成した筒状の反射部材１０
４で囲んで、ヒータ１０２から熱線を反射部材１
０４で反射し、スリツト１０３を介してガラス板
１０５を局部的に加熱するようにしたものであ
る。 This device, as shown in FIGS. 9 and 10,
A heater 102 is fixed to a mold 101 to which a counterweight 100 is attached.
4, the heat rays from the heater 102 are reflected by the member 1.
04 and locally heats the glass plate 105 through the slit 103.

（考案が解決しようとする問題点）上述した局部加熱装置はヒータのガラス板に対
応する部分以外をすべて反射部材で囲んでいるた
めに、ガラス板が曲がつた後ヒータを切つても反
射部材内に余熱が残り、この余熱が加熱用スリツ
トからガラス板に向けて放熱されるので、折曲げ
部分が鋭く曲がらず、垂れる場合もある。(Problem to be solved by the invention) Since the above-mentioned local heating device surrounds all parts of the heater other than the part corresponding to the glass plate with a reflective member, even if the heater is turned off after the glass plate is bent, the reflective member will not be removed. Because residual heat remains inside the glass plate and is radiated from the heating slit toward the glass plate, the bent portion may not bend sharply and may sag.

（問題点を解決するための手段）上記問題点を解決すべく本考案は、ヒータは下
部に加熱用スリツトを形成した反射部材で囲まれ
ると共に、この反射部材の上部に放熱用開口を形
成し、加熱用スリツトの幅を放熱用開口の幅より
も狭く形成した。(Means for Solving the Problems) In order to solve the above problems, the present invention includes a heater surrounded by a reflective member having a heating slit at the bottom thereof, and a heat dissipation opening formed at the top of the reflective member. The width of the heating slit is narrower than the width of the heat dissipation opening.

また、ヒータは昇降装置に取付けて上下動す
る。 Further, the heater is attached to a lifting device and moves up and down.

（作用）放熱用開口の幅よりも狭く形成した加熱用スリ
ツトによつて必要な局部のみ加熱する。(Function) The heating slit, which is narrower than the width of the heat dissipation opening, heats only the necessary local area.

ヒータによる加熱が終了してヒータを切つたと
きに、反射部材内の余熱が上部開口から放熱され
て、余熱によつてガラス板が加熱されることがな
くなる。 When heating by the heater is completed and the heater is turned off, residual heat within the reflective member is radiated from the upper opening, and the glass plate is no longer heated by the residual heat.

（実施例）以下に本考案の実施例を添付図面に基づいて説
明する。(Example) An example of the present invention will be described below based on the accompanying drawings.

第１図及び第２図は本考案に係る局部加熱ヒー
タを備えた局部加熱装置の要部の正面図及びその
側面図、第３図及び第４図は局部加熱ヒータの斜
視図及びその断面図、第５図及び第６図はガラス
板曲げ成形の過程を示す側断面図である。 1 and 2 are a front view and a side view of the main parts of a local heating device equipped with a local heater according to the present invention, and FIGS. 3 and 4 are a perspective view and a sectional view of the local heater. , FIG. 5, and FIG. 6 are side sectional views showing the process of bending and forming a glass plate.

局部加熱装置１は加熱炉内に臨む局部加熱用ヒ
ータ２とこのヒータ２を昇降する加熱炉外に設け
られた昇降装置３とからなる。 The local heating device 1 includes a local heating heater 2 facing into the heating furnace and a lifting device 3 provided outside the heating furnace for lifting and lowering the heater 2.

ヒータ２は第３図及び第４図に示すように、炭
化珪素（SiC）からなる例えば直径８〜16mmの棒
状発熱体４を両端部に図示しない碍子を介してア
ルミナ（Ａ₂O₃）からなる筒状の反射部材５内
に隙間を空けて保持し、反射部材５には下部にガ
ラス加熱用スリツト６を形成すると共に、上部に
放熱用開口７を形成している。 As shown in FIGS. 3 and 4, the heater 2 has a rod-shaped heating element 4 made of silicon carbide (SiC), for example, with a diameter of 8 to 16 mm, and is made of alumina (A ₂ O ₃ ) at both ends with insulators (not shown) interposed therebetween. A slit 6 for glass heating is formed in the lower part of the reflective member 5, and a heat dissipation opening 7 is formed in the upper part of the reflective member 5.

発熱体４としては例えばニクロム線、ボビン等
も使用できる。また反射部材５としてはセラミツ
ク類やステンレスを使用してもよい。 As the heating element 4, for example, a nichrome wire, a bobbin, etc. can be used. Further, as the reflecting member 5, ceramics or stainless steel may be used.

また、反射部材５のスリツト６の幅は２〜20
mm、好ましくは２〜10mmであり、この実施例では
４mmにしている。また、放熱用開口７の幅は10〜
20mmとする。 Also, the width of the slit 6 of the reflective member 5 is 2 to 20 mm.
mm, preferably 2 to 10 mm, and in this example it is 4 mm. In addition, the width of the heat dissipation opening 7 is 10~
The length shall be 20mm.

一方、昇降装置３は、加熱炉の天井部に設けた
基台１０上に固定した支柱１１に２本のガイドロ
ツド１２，１２を取付け、このガイドロツド１
２，１２に昇降板１３をガイドブツシユ１４，１
４を介して上下動可能に装着し、この昇降板１３
の中央部に支柱１１の上板１５に取付けたエアー
シリンダ１６のシリンダロツド１７を連結して、
エアーシリンダ１６で昇降板１３を昇降させるよ
うにしている。 On the other hand, the lifting device 3 has two guide rods 12, 12 attached to a support 11 fixed on a base 10 provided on the ceiling of the heating furnace.
2, 12, the lifting plate 13 is attached to the guide bush 14, 1.
This elevating plate 13 is mounted so as to be vertically movable via the
The cylinder rod 17 of the air cylinder 16 attached to the upper plate 15 of the support column 11 is connected to the center of the column.
The elevating plate 13 is raised and lowered by an air cylinder 16.

また、その昇降板１３の両側部には、各々左右
のスライド部材２０をスライド可能に装着し、こ
の左右のスライド部材２０に上下のスライド部材
２１をスライド可能に装着して、左右のスライド
部材２０と昇降板１３とを左右調整用ボルト２２
で連結し、また左右のスライド部材２０と上下の
スライド部材２１とを上下調整用ボルト２３で連
結している。 In addition, left and right slide members 20 are slidably mounted on both sides of the elevating plate 13, and upper and lower slide members 21 are slidably mounted on the left and right slide members 20, and the left and right slide members 20 are slidably mounted. and the lifting plate 13 with the left and right adjustment bolts 22.
The left and right slide members 20 and the upper and lower slide members 21 are connected by vertical adjustment bolts 23.

そして、その各上下のスライド板２１，２１に
中空ロツド２５，２５を固着して、このロツド２
５，２５を基台１０に形成した貫通孔２６を通し
て炉内２７に入れて、その下部に軸２８を取付
け、この軸２８に支持部材２９，２９を介して前
述した局部加熱用ヒータ２の反射部材５の端部を
保持している。 Then, the hollow rods 25, 25 are fixed to the upper and lower slide plates 21, 21, and the rods 2
5 and 25 are inserted into the furnace 27 through the through hole 26 formed in the base 10, and a shaft 28 is attached to the lower part of the shaft 28. It holds the end of the member 5.

また、支持部材２９，２９には、ガラス板に対
する局部加熱用ヒータ２の反射部材５の放熱用開
口７からの放熱でガラス板３６の深曲げ部分以外
の両端部が加熱されることを防止する遮熱板３０
を取付けている。 Further, the support members 29, 29 are provided with a device to prevent both ends of the glass plate 36 other than the deeply bent portion from being heated by heat radiation from the heat radiation opening 7 of the reflection member 5 of the heater 2 for local heating to the glass plate. Heat shield plate 30
is installed.

尚、局部加熱用ヒータ２の発熱体４の両端部に
は端子４ａ，４ａを固着して、この端子４ａ，４
ａに対する給電線３１を中空ロツド２５の内部を
通してその端部から外部に導いている。 Note that terminals 4a, 4a are fixed to both ends of the heating element 4 of the heater 2 for local heating, and these terminals 4a, 4
A power supply line 31 for a is led through the inside of the hollow rod 25 from its end to the outside.

また、この昇降装置３によるヒータ２の昇降
（上下動）距離は、50mm以上、好ましくは100mm以
上である。 Further, the lifting/lowering (vertical movement) distance of the heater 2 by the lifting device 3 is 50 mm or more, preferably 100 mm or more.

以上の如く構成した局部加熱装置１の作用につ
いて説明する。 The operation of the local heating device 1 configured as above will be explained.

ガラス板３６が加熱炉に搬入される以前には昇
降装置３によつてヒータ２を上昇した状態でヒー
タ２に通電し、ヒータ２を余熱しておく。 Before the glass plate 36 is carried into the heating furnace, the heater 2 is raised by the elevating device 3 and energized to preheat the heater 2.

そして、ガラス板３６が搬入されたときにエア
ーシリンダ１６を作動させて昇降板１３を下降さ
せてロツド２５，２５を介してヒータ２を下降さ
せ、第５図に示すようにヒータ２と金型３５上に
載置されたガラス板３６との距離が２〜40mm、好
ましくは５〜30mmになつた時点で下降を停止し、
ガラス板３６を深曲げ線に沿つて局部的に加熱す
る。それによつて、ガラス板３６は金型３５に倣
つて自重で曲がり始める。 Then, when the glass plate 36 is carried in, the air cylinder 16 is operated to lower the elevating plate 13 and the heater 2 is lowered via the rods 25, 25, and the heater 2 and the mold are moved as shown in FIG. When the distance to the glass plate 36 placed on the glass plate 35 becomes 2 to 40 mm, preferably 5 to 30 mm, the descent is stopped,
The glass plate 36 is locally heated along the deep bend line. As a result, the glass plate 36 begins to bend under its own weight following the mold 35.

そこで、このガラス板３６が曲がり始めた時点
でエアーシリンダ１６を作動させて昇降板１３を
上昇させて第６図に示すようにヒータ２をガラス
板３６の上方へ逃し、同時にヒータ２への通電を
遮断する。 Therefore, when the glass plate 36 begins to bend, the air cylinder 16 is operated to raise the elevating plate 13 to release the heater 2 above the glass plate 36 as shown in FIG. cut off.

この場合、ヒータ２の反射部材５には放熱用開
口７を形成しているので、ヒータ２への通電を遮
断したときに反射部材５内の熱が上方へ放出さ
れ、また加熱時に放熱用開口７から放出される熱
は遮熱板３０によつて遮断されてガラス板３６の
折れ部３６ａを加熱することはない。 In this case, since the heat radiation opening 7 is formed in the reflection member 5 of the heater 2, the heat inside the reflection member 5 is radiated upward when the power supply to the heater 2 is cut off, and the heat radiation opening 7 is formed in the reflection member 5 of the heater 2. The heat emitted from the glass plate 7 is blocked by the heat shield plate 30 and does not heat the bent portion 36a of the glass plate 36.

また、ガラス板３６の形状等に応じてヒータ２
の位置を調整する場合には、左右調整用ボルト２
２を回すことにより、左右スライド部材２０及び
上下スライド部材２１が一体的に左右にスライド
して、中空ロツド２５を第２図の矢示Ａ方向に移
動させてヒータ２の左右方向位置を調整できる。 In addition, depending on the shape of the glass plate 36, etc., the heater 2
When adjusting the position of
By turning 2, the left and right slide members 20 and the top and bottom slide members 21 integrally slide left and right, and the hollow rod 25 can be moved in the direction of arrow A in FIG. 2 to adjust the left and right position of the heater 2. .

更に、上下調整用ボルト２３を回すことによ
り、上下スライド部材２１が左右スライド部材２
０に対して上下にスライドして、中空ロツド２５
を第２図の矢示Ｂ方向に移動させてヒータ２の上
下方向位置を調整できる。 Furthermore, by turning the vertical adjustment bolt 23, the vertical sliding member 21 can be adjusted to the left and right sliding members 2.
Slide the hollow rod 25 up and down relative to 0.
The vertical position of the heater 2 can be adjusted by moving it in the direction of arrow B in FIG.

第７図は本考案の他の実施例を示す斜視図であ
り、この実施例は反射部材４５を五角形状に形成
して、下部に加熱用スリツト６を、上部の放熱用
開口７を形成している。 FIG. 7 is a perspective view showing another embodiment of the present invention. In this embodiment, the reflecting member 45 is formed in a pentagonal shape, with a heating slit 6 at the bottom and a heat dissipation opening 7 at the top. ing.

第８図は本考案の更なる他の実施例を示す斜視
図であり、この実施例は反射部材５５を２個の略
半円筒状部材５６，５６の両端部を円筒状部材５
７，５７の外周面に固着して形成することによ
り、下部に図示しない加熱用スリツトを、上部に
放熱用開口７を形成している。 FIG. 8 is a perspective view showing still another embodiment of the present invention.
7 and 57, a heating slit (not shown) is formed in the lower part and a heat dissipation opening 7 is formed in the upper part.

（考案の効果）以上説明した如く本考案によれば、ヒータは放
熱用開口の幅よりも狭く形成した加熱用スリツト
によつてガラス板の必要な局部のみを加熱するこ
とで折曲げ部分を鋭く曲げることができると共に
放熱用開口によつてヒータへの通電を遮断したと
きに放熱用開口から反射部材内の残熱が放出され
て余熱がなくなるので、ガラス板の曲げ成形の精
度が向上する。(Effect of the invention) As explained above, according to the invention, the heater sharpens the bent portion by heating only the necessary local part of the glass plate using the heating slit formed narrower than the width of the heat dissipation opening. The glass plate can be bent, and when power to the heater is cut off by the heat dissipation opening, the residual heat in the reflective member is released from the heat dissipation opening and there is no residual heat, so the accuracy of bending the glass plate is improved.

また、ヒータが上下動するので、曲げるのに必
要な時間だけ局部加熱することができ、折れ部分
の加熱が任意にできるため、折れアール及びそで
部の形状が出やすい。 In addition, since the heater moves up and down, it is possible to locally heat the fabric for the time required for bending, and the folded area can be heated arbitrarily, so that the folded radius and the shape of the sleeve portion are easily formed.

更に、ガラス板が曲がるとヒータが上方へ逃げ
るためにガラス板とヒータが接触することがな
い。また、炭化珪素ヒータは特に270℃前後の温
度変化があると寿命が短くなるが、ヒータは常に
炉内にあるので寿命が長くなる。 Furthermore, when the glass plate bends, the heater escapes upward, so that the glass plate and the heater do not come into contact with each other. Furthermore, silicon carbide heaters have a short lifespan, especially if there is a temperature change of around 270°C, but since the heater is always inside the furnace, the lifespan is longer.

更にヒータの近傍に遮熱板を設けるようにすれ
ば、深曲げ部分のみを有効に加熱することがで
き、また、ヒータの反射部材がＡ₂O₃であり、
熱変形しないために常に加熱用スリツトが直線状
で、またスリツト幅も変化しないので、深曲げ部
の直線性が保たれ、また反射部材がＡ₂O₃で絶
縁性のためにヒータと反射部材とがシヨートする
ことがない。 Furthermore, if a heat shield plate is provided near the heater, it is possible to effectively heat only the deeply bent portion, and the reflective member of the heater is A ₂ O ₃ ,
The heating slit is always straight to avoid thermal deformation, and the width of the slit does not change, so the straightness of deep bends is maintained.Also, since the reflective material is made of _A2O3 and is insulating, it is easy to connect the heater to the reflective material _. There is no need to shoot.

[Brief explanation of the drawing]

第１図及び第２図は本考案に係る局部加熱ヒー
タを備えた局部加熱装置の要部の正面及びその側
面図、第３図及び第４図は局部加熱ヒータの斜視
図及びその断面図、第５図及び第６図はガラス板
の曲げ成形の過程を示す側断面図、第７図は本考
案の他の実施例を示す斜視図、第８図は本考案の
更に他の実施例を示す斜視図、第９図及び第１０
図は従来の局部加熱装置の正面図及びヒータの断
面図である。尚、図面中１は局部加熱装置、２はヒータ、３
は昇降装置、４は発熱体、５，４５，５５は反射
部材、６は加熱用スリツト、７は放熱用開口、１
０は基台、１３は昇降板、１６はエアーシリン
ダ、２０は左右スライド板、２１は上下スライド
板、２５は中空ロツド、３０は遮熱板、３６はガ
ラス板である。 1 and 2 are front and side views of essential parts of a local heating device equipped with a local heater according to the present invention; FIGS. 3 and 4 are a perspective view and a sectional view of the local heater; 5 and 6 are side sectional views showing the process of bending and forming a glass plate, FIG. 7 is a perspective view showing another embodiment of the present invention, and FIG. 8 is a further embodiment of the present invention. Perspective views shown in Figures 9 and 10.
The figures are a front view of a conventional local heating device and a sectional view of the heater. In the drawings, 1 is a local heating device, 2 is a heater, and 3 is a local heating device.
1 is a lifting device, 4 is a heating element, 5, 45, and 55 are reflective members, 6 is a heating slit, 7 is a heat dissipation opening, 1
0 is a base, 13 is a lifting plate, 16 is an air cylinder, 20 is a left and right sliding plate, 21 is a vertical sliding plate, 25 is a hollow rod, 30 is a heat shield plate, and 36 is a glass plate.

Claims

[Claims for Utility Model Registration] (1) In a local heating device that locally heats a deeply bent portion of a glass plate using a heater, the heater is surrounded by a reflective member having a heating slit formed at the bottom thereof, and 1. A local heating device for a glass plate, characterized in that a heat dissipation opening is formed in an upper part of the member, and the width of the heating slit is narrower than the width of the heat dissipation opening. (2) Utility model registration claim 1, characterized in that the heater is moved up and down by a lifting device.
A local heating device for a glass plate as described in 1.