JP6503937B2 - Equipment for manufacturing glass articles - Google Patents
Equipment for manufacturing glass articles Download PDFInfo
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- JP6503937B2 JP6503937B2 JP2015133625A JP2015133625A JP6503937B2 JP 6503937 B2 JP6503937 B2 JP 6503937B2 JP 2015133625 A JP2015133625 A JP 2015133625A JP 2015133625 A JP2015133625 A JP 2015133625A JP 6503937 B2 JP6503937 B2 JP 6503937B2
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- 239000011521 glass Substances 0.000 title claims description 132
- 238000004519 manufacturing process Methods 0.000 title claims description 26
- 230000007423 decrease Effects 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 description 6
- 238000000465 moulding Methods 0.000 description 5
- 238000007493 shaping process Methods 0.000 description 5
- 238000007500 overflow downdraw method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000003280 down draw process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000006060 molten glass Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000004566 building material Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
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Description
本発明は、例えばオーバーフローダウンドロー法にてガラスリボンを製造するガラス物品の製造装置に関するものである。 The present invention relates to a glass article manufacturing apparatus for manufacturing a glass ribbon by, for example, an overflow downdraw method.
従来、例えば特許文献１に示されるガラスリボン製造装置は、ガラスリボンを流下成形する成形部と、その成形部から流下されるガラスリボンと接触しつつ回転する複数のローラとを備えている。これら複数のローラは、ガラスリボンの幅方向両側部とそれぞれ接触する一対の接触部（コマ部）と、該一対の接触部の軸方向間に構成されガラスリボンに対して接触しない非接触部（軸部）とをそれぞれ有して構成されている。 Conventionally, for example, a glass ribbon manufacturing apparatus disclosed in Patent Document 1 includes a forming unit for forming a glass ribbon by flow-down forming, and a plurality of rollers that rotate in contact with the glass ribbon flowing down from the forming unit. The plurality of rollers are a pair of contact portions (pieces) respectively contacting the widthwise side portions of the glass ribbon, and a noncontact portion (not in contact with the glass ribbon) formed between the axial directions of the pair of contact portions. And the shaft portion).
上記のようなガラスリボン製造装置では、成形部から流下されるガラスリボンは、その幅方向中央部が厚み方向一方側に膨らむように湾曲することがあり、その湾曲部分がローラの非接触部に接触して破損してしまうおそれがある。そこで、各ローラにおける非接触部の径を極力小さくして、該非接触部とガラスリボンとの間隔を大きく確保することが考えられる。しかしながら、非接触部とガラスリボンとの間隔が大きくなるほど、成形部及びローラが収容された炉内で生じる気流（例えば上昇気流）が、ローラの非接触部とガラスリボンとの間を通過しやすくなる。したがって、気流によってガラスリボンの温度が所望の温度より低下したり、温度分布が不均一になって、肉厚や歪が不均一になるおそれがある。また、気流によって、ガラスリボンが厚み方向へ変位し易くなり、ガラスリボンが変形し易くなるおそれがある。すなわち、ガラスリボンおよび当該ガラスリボンから得られるガラス製品の品位が低下するおそれがある。 In the glass ribbon manufacturing apparatus as described above, the glass ribbon which flows down from the forming portion may be curved such that the widthwise central portion bulges to one side in the thickness direction, and the curved portion corresponds to the non-contact portion of the roller. There is a risk of contact and damage. Therefore, it is conceivable to reduce the diameter of the noncontacting portion of each roller as much as possible to secure a large space between the noncontacting portion and the glass ribbon. However, as the distance between the noncontact portion and the glass ribbon increases, the air flow (for example, updraft) generated in the furnace in which the forming portion and the roller are accommodated is more likely to pass between the noncontact portion of the roller and the glass ribbon. Become. Therefore, the temperature of the glass ribbon may be lowered below the desired temperature by the air flow, or the temperature distribution may be nonuniform, so that the thickness or strain may be nonuniform. In addition, the air flow easily displaces the glass ribbon in the thickness direction, and the glass ribbon may be easily deformed. That is, the quality of the glass ribbon and the glass product obtained from the glass ribbon may be degraded.
本発明は、上記課題を解決するためになされたものであって、その目的は、ガラスリボンとローラの非接触部との接触を抑制しつつも、ガラスリボンとローラの非接触部との間に気流が通過することを抑制することができるガラス物品の製造装置を提供することにある。 The present invention has been made to solve the above-mentioned problems, and an object thereof is to prevent the contact between the glass ribbon and the non-contacting portion of the roller, while maintaining the contact between the glass ribbon and the non-contacting portion of the roller. It is an object of the present invention to provide an apparatus for producing a glass article which can suppress the flow of air.
上記課題を解決するガラス物品の製造装置は、ガラスリボンを流下成形する成形部と、前記成形部から流下される前記ガラスリボンと接触しつつ回転する複数のローラとを備え、前記複数のローラが、前記ガラスリボンの幅方向両側部とそれぞれ接触する一対の接触部と、該一対の接触部の軸方向間に構成され前記ガラスリボンに対して接触しない非接触部と、をそれぞれ有してなるガラス物品の製造装置であって、前記複数のローラは、第１ローラと、該第１ローラよりも下流側に配置された第２ローラとを備え、前記第２ローラにおける前記非接触部の軸方向中央部の外径が、前記第１ローラにおける前記非接触部の軸方向中央部の外径よりも小さく構成されている。 The manufacturing apparatus of the glass article which solves the said subject is provided with the shaping | molding part which carries out downflow shaping | molding of a glass ribbon, and several rollers which rotate in contact with the said glass ribbon flowed down from the said shaping | molding part, These several rollers A pair of contact portions respectively contacting the widthwise side portions of the glass ribbon, and a non-contact portion configured between axial directions of the pair of contact portions and not contacting the glass ribbon The apparatus for manufacturing a glass article, wherein the plurality of rollers includes a first roller and a second roller disposed downstream of the first roller, and an axis of the non-contact portion of the second roller. The outer diameter of the central portion in the direction is smaller than the outer diameter of the central portion in the axial direction of the non-contact portion of the first roller.
この構成によれば、下流側の第２ローラにおける非接触部の軸方向中央部の外径が、上流側の第１ローラにおける非接触部の軸方向中央部の外径よりも小さく構成されるため、第１及び第２ローラの非接触部の形状を、成形部から下方に離れるにつれて大きくなるガラスリボンの厚み方向への突出量（膨らみ量）に応じた形状とすることができる。このため、ガラスリボンとローラの非接触部との接触を抑制しつつも、ガラスリボンとローラの非接触部との間に気流が通過することを抑制することができる。 According to this configuration, the outer diameter of the axially central portion of the noncontact portion of the downstream second roller is smaller than the outer diameter of the axially central portion of the noncontact portion of the upstream first roller. Therefore, the shape of the non-contacting portion of the first and second rollers can be made a shape corresponding to the amount of protrusion (the amount of swelling) in the thickness direction of the glass ribbon, which increases as it moves downward from the forming portion. For this reason, it is possible to suppress the flow of air flow between the glass ribbon and the non-contacting portion of the roller while suppressing the contact between the glass ribbon and the non-contacting portion of the roller.
上記ガラス物品の製造装置において、前記非接触部が、前記軸方向に亘って略一定の外径を有することが好ましい。
この構成によれば、ローラの非接触部が軸方向に亘って略一定の外径を有する構成において、ガラスリボンとローラの非接触部との接触を抑制しつつも、ガラスリボンとローラの非接触部との間に気流が通過することを抑制することができる。
In the said glass article manufacturing apparatus, it is preferable that the said non-contact part has a substantially constant outer diameter over the said axial direction.
According to this configuration, in the configuration in which the noncontacting portion of the roller has a substantially constant outer diameter in the axial direction, the contact between the glass ribbon and the noncontacting portion of the roller is suppressed while the noncontacting portion of the glass ribbon and the roller is not It can suppress that an air flow passes between contact parts.
上記ガラス物品の製造装置において、前記非接触部が、前記軸方向の端部から前記軸方向中央部に向かって縮径する形状を成すことが好ましい。
この構成によれば、非接触部が軸方向の端部から中央部にかけて縮径する形状を成すため、非接触部をガラスリボンの厚み方向への湾曲形状（突出形状）に沿った形状とすることが可能となる。これにより、ガラスリボンとローラの非接触部との間隔をより小さく抑えることが可能となり、その結果、ガラスリボンと非接触部との間に気流が通過することをより一層抑制することが可能となる。
In the manufacturing apparatus of the said glass article, it is preferable that the said non-contact part comprises the shape diameter-reduced toward the axial direction center part from the edge part of the said axial direction.
According to this configuration, since the noncontact portion has a shape in which the diameter decreases from the end portion in the axial direction to the central portion, the noncontact portion has a shape along a curved shape (protruding shape) in the thickness direction of the glass ribbon. It becomes possible. This makes it possible to further reduce the distance between the glass ribbon and the noncontacting portion of the roller, and as a result, it is possible to further suppress the air flow between the glass ribbon and the noncontacting portion. Become.
本発明のガラス物品の製造装置によれば、ガラスリボンとローラの非接触部との接触を抑制しつつも、ガラスリボンとローラの非接触部との間に気流が通過することを抑制することができる。 According to the apparatus for manufacturing a glass article of the present invention, while the contact between the glass ribbon and the noncontacting portion of the roller is suppressed, the passage of the air flow between the glass ribbon and the noncontacting portion of the roller is suppressed. Can.
以下、ガラス物品の一例としてガラスリボン（帯状ガラス）を製造する製造装置の一実施形態について図面を参照して説明する。なお、図面では、説明の便宜上、構成の一部を誇張又は簡略化して示す場合がある。また、各部分の寸法比率についても、実際と異なる場合がある。 Hereinafter, an embodiment of a manufacturing apparatus for manufacturing a glass ribbon (band-like glass) as an example of a glass article will be described with reference to the drawings. In the drawings, for convenience of explanation, part of the configuration may be shown exaggerated or simplified. Also, the dimensional ratio of each part may be different from the actual one.
図１（ａ）及び図１（ｂ）に示すように、ガラスリボン製造装置１１は、ダウンドロー法を用いてガラスリボンＧを成形する成形部１２を備えている。本実施形態のガラスリボン製造装置１１は、ダウンドロー法の一種であるオーバーフローダウンドロー法を用いてガラスリボンＧを製造する装置である。なお、ガラスリボンＧの用途としては、例えば、ディスプレイ用途、タッチパネル用途、光電変換パネル用途、電子デバイス用途、窓ガラス用途、建材用途、及び車両用途が挙げられる。 As shown in FIGS. 1 (a) and 1 (b), the glass ribbon manufacturing apparatus 11 is provided with a forming portion 12 for forming the glass ribbon G using a downdraw method. The glass ribbon manufacturing apparatus 11 of this embodiment is an apparatus which manufactures the glass ribbon G using the overflow down draw method which is 1 type of a down draw method. In addition, as an application of glass ribbon G, a display application, a touch panel application, a photoelectric conversion panel application, an electronic device application, a window glass application, a building material application, and a vehicle application are mentioned, for example.
図１（ｂ）に示すように、ガラスリボン製造装置１１の成形部１２は、溶融ガラスＭＧをオーバーフローさせる溝１２ａと、オーバーフローした溶融ガラスＭＧの流下を案内する第１案内面１２ｂ及び第２案内面１２ｃとを有している。第２案内面１２ｃは、第１案内面１２ｂの反対側に位置し、第１案内面１２ｂと第２案内面１２ｃとに沿って流下した溶融ガラスＭＧが成形部１２の下端で融合されることによりガラスリボンＧが成形される。 As shown in FIG. 1 (b), the forming section 12 of the glass ribbon manufacturing apparatus 11 has a groove 12a for causing the molten glass MG to overflow, and a first guide surface 12b and a second guide for guiding the flow of the overflowing molten glass MG. And a surface 12c. The second guide surface 12c is located on the opposite side of the first guide surface 12b, and the molten glass MG flowing down along the first guide surface 12b and the second guide surface 12c is fused at the lower end of the forming portion 12 Glass ribbon G is shape | molded by this.
図１（ａ）及び図１（ｂ）に示すように、ガラスリボン製造装置１１は、成形部１２の下方において、ガラスリボンＧの流下方向Ｚの上流側から順に、第１牽引ローラ対１３、第２牽引ローラ対１４、及び第３牽引ローラ対１５を備えている。第１〜第３牽引ローラ対１３〜１５はそれぞれ、成形部１２から流下されたガラスリボンＧを厚み方向Ｙに挟持しつつ回転して該ガラスリボンＧを下方（流下方向Ｚ）に牽引する。なお、第１〜第３牽引ローラ対１３〜１５にて流下方向Ｚに牽引されたガラスリボンＧは、切断工程等の後工程に搬送される。 As shown in FIGS. 1 (a) and 1 (b), the glass ribbon manufacturing apparatus 11 includes the first pulling roller pair 13, in order from the upstream side in the flow-down direction Z of the glass ribbon G below the forming unit 12. A second pulling roller pair 14 and a third pulling roller pair 15 are provided. The first to third pulling roller pairs 13 to 15 respectively hold and rotate the glass ribbon G, which has flowed down from the forming section 12, in the thickness direction Y, and pull the glass ribbon G downward (flowing direction Z). In addition, the glass ribbon G pulled by the 1st-3rd pulling roller pair 13-15 in the downflow direction Z is conveyed by post-processes, such as a cutting process.
第１牽引ローラ対１３を構成する一対の第１牽引ローラ２１は互いに同一構成を有し、ガラスリボンＧの表面側及び裏面側に対で設けられている。各第１牽引ローラ２１は、ガラスリボンＧの幅方向Ｘに沿って設けられた回転軸２１ａと、該回転軸２１ａと一体回転可能に構成された一対の接触部２１ｂと、該一対の接触部２１ｂの軸方向間に構成された中間部２１ｃとを備えている。 The pair of first pulling rollers 21 constituting the first pulling roller pair 13 have the same configuration, and are provided in pairs on the front surface side and the back surface side of the glass ribbon G. Each first pulling roller 21 has a rotation shaft 21a provided along the width direction X of the glass ribbon G, a pair of contact portions 21b configured to be integrally rotatable with the rotation shaft 21a, and the pair of contact portions And an intermediate portion 21c configured in the axial direction of 21b.
各接触部２１ｂは、回転軸２１ａの軸線を中心とする円筒状に形成されている。また、一対の接触部２１ｂは、成形部１２から流下されるガラスリボンＧの幅方向Ｘの両端部にそれぞれ対応して設けられ、一方の第１牽引ローラ２１の各接触部２１ｂと、他方の第１牽引ローラ２１の各接触部２１ｂとで、ガラスリボンＧの幅方向Ｘの両端部を厚み方向Ｙに挟み込むように構成されている。そして、一対の第１牽引ローラ２１が各接触部２１ｂでガラスリボンＧを挟み込んだ状態で、図示しないモータの駆動によって回転軸２１ａ及び各接触部２１ｂが回転されることで、ガラスリボンＧが流下方向Ｚに牽引される。 Each contact portion 21b is formed in a cylindrical shape centered on the axis of the rotation shaft 21a. Further, the pair of contact portions 21 b are provided corresponding to both end portions in the width direction X of the glass ribbon G flowing down from the forming portion 12, and each contact portion 21 b of one first pulling roller 21 and the other The respective contact portions 21 b of the first pulling roller 21 are configured to sandwich both ends in the width direction X of the glass ribbon G in the thickness direction Y. Then, with the pair of first pulling rollers 21 sandwiching the glass ribbon G by the respective contact portions 21b, the glass ribbon G is caused to flow down by the rotation of the rotary shaft 21a and the respective contact portions 21b by the drive of a motor not shown. Towed in direction Z
各第１牽引ローラ２１の前記中間部２１ｃは、回転軸２１ａの軸線を中心とする円筒状をなしている。本実施形態では、中間部２１ｃは各接触部２１ｂと同一材質にて一体形成され、一方の接触部２１ｂの軸方向内側面から他方の接触部２１ｂの軸方向内側面に亘って形成されている。また、中間部２１ｃの外径はその軸方向全体に亘って一様に形成され、その中間部２１ｃの外径Ｄ１は接触部２１ｂの外径Ｄ１ａよりも小さく形成されている。つまり、中間部２１ｃは、接触部２１ｂにて牽引されるガラスリボンＧに対して厚み方向Ｙに離間され、ガラスリボンＧと接触しないように構成（即ち、非接触部として構成）されている。 The intermediate portion 21c of each first pulling roller 21 has a cylindrical shape centered on the axis of the rotating shaft 21a. In the present embodiment, the intermediate portion 21c is integrally formed of the same material as each contact portion 21b, and is formed over the axial inner surface of one contact portion 21b to the axial inner surface of the other contact portion 21b. . Further, the outer diameter of the middle portion 21c is uniformly formed over the entire axial direction, and the outer diameter D1 of the middle portion 21c is smaller than the outer diameter D1a of the contact portion 21b. That is, the intermediate portion 21c is configured to be separated in the thickness direction Y with respect to the glass ribbon G pulled by the contact portion 21b and not to be in contact with the glass ribbon G (that is, configured as a noncontact portion).
第２牽引ローラ対１４を構成する一対の第２牽引ローラ２２は互いに同一構成を有し、ガラスリボンＧの表面側及び裏面側に対で設けられている。各第２牽引ローラ２２は、ガラスリボンＧの幅方向Ｘに沿って設けられた回転軸２２ａと、該回転軸２２ａと一体回転可能に構成された一対の接触部２２ｂと、該一対の接触部２２ｂの軸方向間に構成された中間部２２ｃとを備えている。 The pair of second pulling rollers 22 constituting the second pulling roller pair 14 have the same configuration, and are provided in pairs on the front surface side and the back surface side of the glass ribbon G. Each second pulling roller 22 has a rotation shaft 22a provided along the width direction X of the glass ribbon G, a pair of contact portions 22b configured to be integrally rotatable with the rotation shaft 22a, and the pair of contact portions And an intermediate portion 22c configured in the axial direction of the shaft 22b.
各接触部２２ｂは、回転軸２２ａの軸線を中心とする円筒状に形成されている。また、一対の接触部２２ｂは、成形部１２から流下されるガラスリボンＧの幅方向Ｘの両端部にそれぞれ対応して設けられ、一方の第２牽引ローラ２２の各接触部２２ｂと、他方の第２牽引ローラ２２の各接触部２２ｂとで、ガラスリボンＧの幅方向Ｘの両端部を厚み方向Ｙに挟み込むように構成されている。そして、一対の第２牽引ローラ２２が各接触部２２ｂでガラスリボンＧを挟み込んだ状態で、図示しないモータの駆動によって回転軸２２ａ及び各接触部２２ｂが回転されることで、ガラスリボンＧが流下方向Ｚに牽引される。 Each contact portion 22b is formed in a cylindrical shape centered on the axis of the rotation shaft 22a. Further, the pair of contact portions 22 b are provided corresponding to both end portions in the width direction X of the glass ribbon G flowing down from the forming portion 12, and each contact portion 22 b of one second pulling roller 22 and the other The respective contact portions 22 b of the second pulling roller 22 are configured to sandwich both ends in the width direction X of the glass ribbon G in the thickness direction Y. Then, with the pair of second pulling rollers 22 sandwiching the glass ribbon G by the respective contact portions 22b, the rotation of the rotary shaft 22a and the respective contact portions 22b by the drive of a motor (not shown) causes the glass ribbon G to flow downward. Towed in direction Z
各第２牽引ローラ２２の前記中間部２２ｃは、回転軸２２ａの軸線を中心とする円筒状をなしている。中間部２２ｃは、前記第１牽引ローラ２１の中間部２１ｃと同様に、各接触部２２ｂと同一材質にて一体形成され、一方の接触部２２ｂの軸方向内側面から他方の接触部２２ｂの軸方向内側面に亘って形成されている。また、中間部２２ｃの外径はその軸方向全体に亘って一様に形成され、その中間部２２ｃの外径Ｄ２は接触部２２ｂの外径Ｄ２ａよりも小さく形成されている。つまり、中間部２２ｃは、接触部２２ｂにて牽引されるガラスリボンＧに対して厚み方向Ｙに離間され、ガラスリボンＧと接触しないように構成（即ち、非接触部として構成）されている。 The intermediate portion 22c of each second pulling roller 22 has a cylindrical shape centered on the axis of the rotation shaft 22a. The intermediate portion 22c is integrally formed of the same material as each contact portion 22b in the same manner as the intermediate portion 21c of the first pulling roller 21, and the axis of the one contact portion 22b from the axial direction inner side face of the other contact portion 22b It is formed over the direction inner side. Further, the outer diameter of the middle portion 22c is uniformly formed over the entire axial direction, and the outer diameter D2 of the middle portion 22c is smaller than the outer diameter D2a of the contact portion 22b. That is, the intermediate portion 22c is configured to be separated from the glass ribbon G pulled by the contact portion 22b in the thickness direction Y and not to be in contact with the glass ribbon G (that is, configured as a noncontact portion).
第３牽引ローラ対１５を構成する一対の第３牽引ローラ２３は互いに同一構成を有し、ガラスリボンＧの表面側及び裏面側に対で設けられている。各第３牽引ローラ２３は、ガラスリボンＧの幅方向Ｘに沿って設けられた回転軸２３ａと、該回転軸２３ａと一体回転可能に構成された一対の接触部２３ｂと、該一対の接触部２３ｂの軸方向間に構成された中間部２３ｃとを備えている。 The pair of third pulling rollers 23 constituting the third pulling roller pair 15 have the same configuration, and are provided in pairs on the front surface side and the back surface side of the glass ribbon G. Each third pulling roller 23 has a rotation shaft 23a provided along the width direction X of the glass ribbon G, a pair of contact portions 23b configured to be integrally rotatable with the rotation shaft 23a, and the pair of contact portions And an intermediate portion 23c configured in the axial direction of 23b.
各接触部２３ｂは、回転軸２３ａの軸線を中心とする円筒状に形成されている。また、一対の接触部２３ｂは、成形部１２から流下されるガラスリボンＧの幅方向Ｘの両端部にそれぞれ対応して設けられ、一方の第３牽引ローラ２３の各接触部２３ｂと、他方の第３牽引ローラ２３の各接触部２３ｂとで、ガラスリボンＧの幅方向Ｘの両端部を厚み方向Ｙに挟み込むように構成されている。そして、一対の第３牽引ローラ２３が各接触部２３ｂでガラスリボンＧを挟み込んだ状態で、図示しないモータの駆動によって回転軸２３ａ及び各接触部２３ｂが回転されることで、ガラスリボンＧが流下方向Ｚに牽引される。 Each contact portion 23b is formed in a cylindrical shape centered on the axis of the rotation shaft 23a. Further, the pair of contact portions 23 b are provided corresponding to both end portions in the width direction X of the glass ribbon G flowing down from the forming portion 12, and each contact portion 23 b of one third pulling roller 23 and the other Both end portions of the glass ribbon G in the width direction X are sandwiched by the contact portions 23 b of the third pulling roller 23 in the thickness direction Y. Then, with the pair of third pulling rollers 23 sandwiching the glass ribbon G by the respective contact portions 23b, the rotation of the rotary shaft 23a and the respective contact portions 23b by the drive of a motor (not shown) causes the glass ribbon G to flow downward. Towed in direction Z
各第３牽引ローラ２３の前記中間部２３ｃは、回転軸２３ａの軸線を中心とする円筒状をなしている。中間部２３ｃは、前記第１牽引ローラ２１の中間部２１ｃと同様に、各接触部２３ｂと同一材質にて一体形成され、一方の接触部２３ｂの軸方向内側面から他方の接触部２３ｂの軸方向内側面に亘って形成されている。また、中間部２３ｃの外径はその軸方向全体に亘って一様に形成され、その中間部２３ｃの外径Ｄ３は接触部２３ｂの外径Ｄ３ａよりも小さく形成されている。つまり、中間部２３ｃは、接触部２３ｂにて牽引されるガラスリボンＧに対して厚み方向Ｙに離間され、ガラスリボンＧと接触しないように構成（即ち、非接触部として構成）されている。 The intermediate portion 23c of each third pulling roller 23 has a cylindrical shape centered on the axis of the rotation shaft 23a. The intermediate portion 23c is integrally formed of the same material as each contact portion 23b in the same manner as the intermediate portion 21c of the first pulling roller 21, and the axis of the one contact portion 23b from the axial direction inner side face of the other contact portion 23b It is formed over the direction inner side. Further, the outer diameter of the intermediate portion 23c is uniformly formed over the entire axial direction, and the outer diameter D3 of the intermediate portion 23c is smaller than the outer diameter D3a of the contact portion 23b. That is, the intermediate portion 23c is configured to be separated from the glass ribbon G pulled by the contact portion 23b in the thickness direction Y and not to be in contact with the glass ribbon G (that is, configured as a noncontact portion).
上記の第１〜第３牽引ローラ２１〜２３では、各中間部２１ｃ，２２ｃ，２３ｃの外径Ｄ１，Ｄ２，Ｄ３がＤ１＞Ｄ２＞Ｄ３となるように形成されている。つまり、第１〜第３牽引ローラ２１〜２３は、流下方向Ｚの下流側のものほど中間部２１ｃの外径が小さくなるように形成されている。 In the first to third pulling rollers 21 to 23 described above, the outer diameters D1, D2, and D3 of the intermediate portions 21c, 22c, and 23c are formed such that D1> D2> D3. That is, the first to third pulling rollers 21 to 23 are formed such that the outer diameter of the intermediate portion 21c is smaller as the downstream side in the flow-down direction Z.
次に、本実施形態の作用について説明する。
成形部１２から流下成形されたガラスリボンＧは、第１〜第３牽引ローラ対１３〜１５にて下方に牽引される。このとき、ガラスリボンＧは、例えば図２（ａ）に示すように、その幅方向Ｘの中央部（幅方向中央部Ｇａ）が厚み方向Ｙの一方側（図２（ａ）では上側）に膨らむように湾曲することがある。そして、このようにガラスリボンＧが湾曲する場合、図２（ａ）〜（ｃ）に示すように、ガラスリボンＧの厚み方向Ｙへの突出量（膨らみ量）は下流側ほど大きくなる傾向がある。
Next, the operation of the present embodiment will be described.
The glass ribbon G flow-down molded from the forming section 12 is pulled downward by the first to third pulling roller pairs 13-15. At this time, for example, as shown in FIG. 2A, in the glass ribbon G, the central part (central part Ga in the width direction) in the width direction X is on one side in the thickness direction Y (upper side in FIG. 2A). May curve like bulging. And when the glass ribbon G curves in this way, as shown in FIGS. 2A to 2C, the amount of protrusion (the amount of expansion) in the thickness direction Y of the glass ribbon G tends to increase toward the downstream side. is there.
ここで、本実施形態の第１〜第３牽引ローラ２１〜２３では、中間部２１ｃ，２２ｃ，２３ｃの外径Ｄ１，Ｄ２，Ｄ３がＤ１＞Ｄ２＞Ｄ３となる、つまり、下流側のものほど中間部２１ｃ，２２ｃ，２３ｃの外径Ｄ１，Ｄ２，Ｄ３が小さくなるように構成されている。これにより、下流側ほど厚み方向Ｙに突出するガラスリボンＧと中間部２１ｃ〜２３ｃとの接触を抑制しつつも、該ガラスリボンＧと中間部２１ｃ〜２３ｃとの間隔を極力小さく保つことができる。その結果、成形部１２及び第１〜第３牽引ローラ２１〜２３が収容された炉内で生じる上昇気流がガラスリボンＧと中間部２１ｃ〜２３ｃとの間を通過しづらくなる。 Here, in the first to third pulling rollers 21 to 23 of the present embodiment, the outer diameters D1, D2, and D3 of the intermediate portions 21c, 22c, and 23c are D1> D2> D3, that is, closer to the downstream side The outer diameters D1, D2, and D3 of the intermediate portions 21c, 22c, and 23c are configured to be small. Thereby, while suppressing the contact between the glass ribbon G protruding in the thickness direction Y toward the downstream side and the intermediate portions 21c to 23c, the distance between the glass ribbon G and the intermediate portions 21c to 23c can be kept as small as possible. . As a result, the updraft generated in the furnace in which the forming portion 12 and the first to third pulling rollers 21 to 23 are accommodated is difficult to pass between the glass ribbon G and the intermediate portions 21 c to 23 c.
次に、本実施形態の特徴的な効果を記載する。
（１）ガラスリボンＧの流下方向Ｚに沿って上流側から順に並設された第１〜第３牽引ローラ２１〜２３はそれぞれ、ガラスリボンＧの幅方向両側部とそれぞれ接触する一対の接触部２１ｂ〜２３ｂと、該一対の接触部２１ｂ〜２３ｂの軸方向間に構成されガラスリボンＧに対して接触しない中間部２１ｃ〜２３ｃ（非接触部）とを有している。そして、第２牽引ローラ２２の中間部２２ｃの外径Ｄ２は、第１牽引ローラ２１の中間部２１ｃの外径Ｄ１よりも小さく構成される。更に、第３牽引ローラ２３の中間部２３ｃの外径Ｄ３は、第２牽引ローラ２２の中間部２２ｃの外径Ｄ２よりも小さく構成される。
Next, characteristic effects of the present embodiment will be described.
(1) The first to third pulling rollers 21 to 23 arranged in parallel from the upstream side along the flow-down direction Z of the glass ribbon G respectively contact a pair of contact portions with the widthwise side portions of the glass ribbon G 21 b to 23 b, and intermediate portions 21 c to 23 c (non-contact portions) which are configured in the axial direction of the pair of contact portions 21 b to 23 b and do not contact the glass ribbon G. The outer diameter D2 of the middle portion 22c of the second pulling roller 22 is smaller than the outer diameter D1 of the middle portion 21c of the first pulling roller 21. Further, the outer diameter D3 of the middle portion 23c of the third pulling roller 23 is smaller than the outer diameter D2 of the middle portion 22c of the second pulling roller 22.
このように、下流側の牽引ローラ２１〜２３ほど中間部２１ｃ〜２３ｃの外径が小さく構成されることで、下流側ほど大きくなるガラスリボンＧの突出量に応じた中間部２１ｃ〜２３ｃの外径Ｄ１，Ｄ２，Ｄ３とすることができる。それにより、ガラスリボンＧと中間部２１ｃ〜２３ｃとの接触を抑制しつつも、ガラスリボンＧと中間部２１ｃ〜２３ｃとの間に炉内の上昇気流が通過することを抑制することができる。その結果、ガラスリボンＧと中間部２１ｃ〜２３ｃとの間を通過する上昇気流が、ガラスリボンＧの温度を低下させたり、ガラスリボンＧを厚み方向Ｙに変位させたりすることを抑制できる。 As described above, the outer diameters of the intermediate portions 21c to 23c are configured to be smaller as the downstream pulling rollers 21 to 23 are provided, so that the outer portions of the intermediate portions 21c to 23c correspond to the amount of projection of the glass ribbon G which increases toward the downstream side. The diameters D1, D2, and D3 can be used. Thereby, while suppressing the contact between the glass ribbon G and the intermediate portions 21c to 23c, it is possible to suppress the rising air flow in the furnace between the glass ribbon G and the intermediate portions 21c to 23c. As a result, it is possible to suppress that the rising air passing between the glass ribbon G and the intermediate portions 21c to 23c lowers the temperature of the glass ribbon G or displaces the glass ribbon G in the thickness direction Y.
なお、上記実施形態は、以下のように変更してもよい。
・上記実施形態の第１〜第３牽引ローラ２１〜２３では、各中間部２１ｃ，２２ｃ，２３ｃは、一方の接触部２１ｂ，２２ｂ，２３ｂの軸方向内側面から他方の接触部２１ｂ，２２ｂ，２３ｂの軸方向内側面まで一様な外径Ｄ１，Ｄ２，Ｄ３で形成されている。しかしながら、これに特に限定されるものではなく、中間部２１ｃ，２２ｃ，２３ｃの軸方向中央部の外径が下流側の牽引ローラ２１〜２３ほど小さく形成されていれば、中間部２１ｃ，２２ｃ，２３ｃの外径が軸方向に一様でない構成としてもよい。
The above embodiment may be modified as follows.
-In 1st-3rd pulling roller 21-23 of the said embodiment, each middle part 21c, 22c, 23c is the contact part 21b, 22b of the other from the axial direction inner surface of one contact part 21b, 22b, 23b. It is formed with uniform outer diameter D1, D2, D3 to the axial direction inner surface of 23b. However, the present invention is not particularly limited thereto, and the intermediate portions 21c, 22c, 22c, 22c, 23c are formed if the outer diameters of the axial center portions of the intermediate portions 21c, 22c, 23c are formed as small as the downstream pulling rollers 21-23. The outer diameter of 23c may not be uniform in the axial direction.
例えば、図３に示す構成では、第１牽引ローラ２１の中間部２１ｃは、軸方向両端部（各接触部２１ｂの軸方向内側面）から軸方向中央部に向かって縮径するテーパ部２１ｄを有している。この構成では、中間部２１ｃは、両側のテーパ部２１ｄの間の中央部位２１ｅで最小径（外径Ｄ１）となる。また、第２及び第３牽引ローラ２２，２３についても同様のテーパ部２２ｄ，２３ｄをそれぞれ有している。つまり、第２牽引ローラ２２の中間部２２ｃは、両側のテーパ部２２ｄの間の中央部位２２ｅで最小径（外径Ｄ２）となる。また、第３牽引ローラ２３の中間部２３ｃは、両側のテーパ部２３ｄの間の中央部位２３ｅで最小径（外径Ｄ３）となる。そして、これら第１〜第３牽引ローラ２１〜２３では、中間部２１ｃ，２２ｃ，２３ｃの中央部位２１ｅ，２２ｅ，２３ｅの外径Ｄ１，Ｄ２，Ｄ３が、Ｄ１＞Ｄ２＞Ｄ３となるように構成されている。 For example, in the configuration shown in FIG. 3, the intermediate portion 21 c of the first pulling roller 21 has a tapered portion 21 d that decreases in diameter toward the axial central portion from both axial end portions (axial inner surface of each contact portion 21 b). Have. In this configuration, the middle portion 21c has a minimum diameter (outside diameter D1) at the central portion 21e between the tapered portions 21d on both sides. The second and third pulling rollers 22 and 23 also have similar tapered portions 22 d and 23 d, respectively. That is, the middle portion 22c of the second pulling roller 22 has a minimum diameter (outside diameter D2) at the central portion 22e between the tapered portions 22d on both sides. The middle portion 23c of the third pulling roller 23 has a minimum diameter (outside diameter D3) at the central portion 23e between the tapered portions 23d on both sides. The outer diameters D1, D2, and D3 of the central portions 21e, 22e, and 23e of the intermediate portions 21c, 22c, and 23c are configured such that D1> D2> D3 in these first to third pulling rollers 21 to 23. It is done.
このように、中間部２１ｃ，２２ｃ，２３ｃの軸方向における少なくとも中央部位２１ｅ，２２ｅ，２３ｅの外径Ｄ１，Ｄ２，Ｄ３が、下流側の牽引ローラ２１〜２３ほど小さく構成されていれば、上記実施形態と略同様の効果を得ることができる。更に、ガラスリボンＧの幅方向中央部Ｇａが厚み方向Ｙに膨らむ場合（図２参照）、中間部２１ｃ，２２ｃ，２３ｃがテーパ部２１ｄ，２２ｄ，２３ｄを有することで、ガラスリボンＧにおける幅方向中央部Ｇａ以外の箇所においても中間部２１ｃ〜２３ｃとの間の距離を小さくすることが可能となる。即ち、中間部２１ｃ〜２３ｃは、テーパ部２１ｄ，２２ｄ，２３ｄを有することで、ガラスリボンＧの厚み方向Ｙへの湾曲形状（突出形状）に沿った形状となるため、ガラスリボンＧと中間部２１ｃ〜２３ｃとの間隔をより小さく抑えることが可能となる。その結果、ガラスリボンＧと中間部２１ｃ〜２３ｃとの間に気流が通過することをより一層抑制することが可能となる。 Thus, if the outer diameters D1, D2, D3 of at least the central portions 21e, 22e, 23e in the axial direction of the intermediate portions 21c, 22c, 23c are configured to be as small as the pulling rollers 21 to 23 on the downstream side, An effect substantially similar to that of the embodiment can be obtained. Furthermore, when the central portion Ga in the width direction of the glass ribbon G bulges in the thickness direction Y (see FIG. 2), the middle portions 21c, 22c, and 23c have tapered portions 21d, 22d, and 23d, so that the width direction in the glass ribbon G is obtained. It is possible to reduce the distance between the middle portions 21c to 23c even in places other than the central portion Ga. That is, since the intermediate portions 21c to 23c have the tapered portions 21d, 22d, and 23d, the intermediate portions 21c to 23c have a shape along the curved shape (protruding shape) in the thickness direction Y of the glass ribbon G. It is possible to keep the distance from 21c to 23c smaller. As a result, it is possible to further suppress passage of the air flow between the glass ribbon G and the intermediate portions 21c to 23c.
・上記実施形態では、第１〜第３牽引ローラ２１〜２３の中間部２１ｃ，２２ｃ，２３ｃの外径Ｄ１，Ｄ２，Ｄ３が、Ｄ１＞Ｄ２＞Ｄ３となるように構成したが、選択された任意の牽引ローラについて、下流側の牽引ローラの中間部の外径が上流側の牽引ローラの中間部の外径より小さければ、その構成を適宜変形してもよい。例えば、Ｄ１＝Ｄ２＞Ｄ３、又はＤ１＞Ｄ２＝Ｄ３となるように構成してもよい。 In the above embodiment, the outer diameters D1, D2, and D3 of the intermediate portions 21c, 22c, and 23c of the first to third pulling rollers 21 to 23 are configured such that D1> D2> D3. For any pulling roller, if the outer diameter of the middle portion of the pulling roller on the downstream side is smaller than the outer diameter of the middle portion of the pulling roller on the upstream side, the configuration may be modified as appropriate. For example, it may be configured such that D1 = D2> D3 or D1> D2 = D3.
・上記実施形態では、各牽引ローラ２１〜２３の各接触部２１ｂ，２２ｂ，２３ｂは各中間部２１ｃ，２２ｃ，２３ｃとそれぞれ一体形成されたが、これに限定されるものではなく、各接触部２１ｂ，２２ｂ，２３ｂを各中間部２１ｃ，２２ｃ，２３ｃとは別体で構成してもよい。このような場合、各接触部２１ｂ，２２ｂ，２３ｂの外径が略同径であると、接触部２１ｂ，２２ｂ，２３ｂの部品を各牽引ローラ２１〜２３で共用（流用）できるため好ましい。なお、上記は一例であり、上下の各牽引ローラについて接触部の外径は任意に定めてもよい。この場合、上流の第１牽引ローラ２１の接触部２１ｂの外径Ｄ１ａと中間部２１ｃの外径Ｄ１との差が、下流の第２牽引ローラ２２の接触部２２ｂの外径Ｄ２ａと中間部２２ｃの外径Ｄ２との差より小さいことが好ましい。また同様に、第２牽引ローラ２２の接触部２２ｂの外径Ｄ２ａと中間部２２ｃの外径Ｄ２との差が、下流の第３牽引ローラ２３の接触部２３ｂの外径Ｄ３ａと中間部２３ｃの外径Ｄ３との差より小さいことが好ましい。 -In the said embodiment, although each contact part 21b, 22b, 23b of each pulling roller 21-23 was each integrally formed with each intermediate part 21c, 22c, 23c, it is not limited to this, Each contact part 21b, 22b, and 23b may be configured separately from each of the middle portions 21c, 22c, and 23c. In such a case, it is preferable that the components of the contact portions 21b, 22b, and 23b can be shared (used) by the pulling rollers 21 to 23 when the outer diameters of the contact portions 21b, 22b, and 23b are substantially the same. The above is an example, and the outer diameter of the contact portion may be set arbitrarily for each of the upper and lower pulling rollers. In this case, the difference between the outer diameter D1a of the contact portion 21b of the upstream first pulling roller 21 and the outer diameter D1 of the middle portion 21c is the difference between the outer diameter D2a of the contact portion 22b of the downstream second pulling roller 22 and the intermediate portion 22c. Is preferably smaller than the difference with the outer diameter D 2 of Similarly, the difference between the outer diameter D2a of the contact portion 22b of the second pulling roller 22 and the outer diameter D2 of the middle portion 22c is the difference between the outer diameter D3a of the contact portion 23b of the third pulling roller 23 downstream and the middle portion 23c. It is preferable to be smaller than the difference with the outer diameter D3.
・各牽引ローラ２１〜２３の接触部２１ｂ，２２ｂ，２３ｂ及び中間部２１ｃ，２２ｃ，２３ｃを円筒状に形成したが、これ以外に例えば、円柱状に形成してもよい。
・上記実施形態では、第１牽引ローラ対１３を構成する一対の第１牽引ローラ２１は、互いに同一形状を有するが、一対の第１牽引ローラ２１を互いに別形状として構成してもよい。また、第２牽引ローラ対１４及び第３牽引ローラ対１５についても同様に変更可能である。なお、ガラスリボンＧの膨らみ方向を一方側のみに制御可能な場合には、第２牽引ローラ対１４及び第３牽引ローラ対１５において、ガラスリボンＧの膨らむ側に配置された第２牽引ローラ２２（第３牽引ローラ２３）のみを上記実施形態の構成とし、反対側の対となる牽引ローラを例えば第１牽引ローラ２１と同一構成（つまり、外径Ｄ１の中間部を有する構成）としてもよい。このような構成によれば、ガラスリボンＧとの中間部２１ｃ〜２３ｃとの接触を抑制しつつも、ガラスリボンＧと中間部２１ｃ〜２３ｃとの間の隙間を更に狭く構成することが可能となる。
-Although contact part 21b, 22b, 23b and each middle part 21c, 22c, 23c of each pulling roller 21-23 were formed cylindrically, you may form in a column shape other than this, for example.
In the above-described embodiment, the pair of first pulling rollers 21 configuring the first pulling roller pair 13 have the same shape as each other, but the pair of first pulling rollers 21 may be configured as different shapes from each other. Further, the second towing roller pair 14 and the third towing roller pair 15 can be similarly modified. When the expansion direction of the glass ribbon G can be controlled to one side only, the second traction roller 22 disposed on the expansion side of the glass ribbon G in the second traction roller pair 14 and the third traction roller pair 15 (Only the third traction roller 23 may be the configuration of the above embodiment, and the opposite pair of traction rollers may have the same configuration as that of the first traction roller 21 (that is, a configuration having an intermediate portion of the outer diameter D1). . According to such a configuration, it is possible to further narrow the gap between the glass ribbon G and the intermediate portions 21c to 23c while suppressing the contact with the intermediate portions 21c to 23c with the glass ribbon G. Become.
・上記実施形態では、ガラスリボンＧを牽引する牽引ローラ対の構成を、第１〜第３牽引ローラ対１３〜１５からなる３段構成としたが、これに特に限定されるものではなく、２段又は４段以上の構成としてもよい。 In the above embodiment, the configuration of the pulling roller pair for pulling the glass ribbon G is a three-stage configuration including the first to third pulling roller pairs 13 to 15. However, the present invention is not particularly limited thereto. It is good also as composition of a step or four steps or more.
・上記実施形態のガラスリボン製造装置１１において、第１牽引ローラ対１３よりも上流側（成形部１２側）に、ガラスリボンＧの成形や冷却を行う冷却ローラ等を設けることもできる。 -In the glass ribbon manufacturing apparatus 11 of the said embodiment, the cooling roller etc. which shape | mold and cool glass ribbon G can also be provided in the upstream (the shaping | molding part 12 side) rather than the 1st pulling roller pair 13. FIG.
・上記実施形態では、ガラスリボン製造装置１１は、オーバーフローダウンドロー法を用いてガラスリボンＧを成形する成形部１２を備えているが、オーバーフローダウンドロー法に限定されず、例えば、スロットダウンドロー法やリドロー法等のガラスを流下成形する成形部に変更することもできる。 -Although the glass ribbon manufacturing apparatus 11 is provided with the shaping | molding part 12 which shape | molds the glass ribbon G using the overflow down draw method in the said embodiment, it is not limited to the overflow down draw method, For example, the slot down draw method It is also possible to change to a forming part for down-flow forming glass such as redraw method.
・上記の実施形態並びに各変形例は適宜組み合わせてもよい。
次に、上記実施形態及び別例から把握できる技術的思想を以下に追記する。
（イ）ガラスリボンを流下成形する成形部と、
前記成形部から流下される前記ガラスリボンと接触しつつ回転する複数のローラと
を備え、
前記複数のローラが、前記ガラスリボンの幅方向両側部とそれぞれ接触する一対の接触部と、該一対の接触部の軸方向間に構成され前記ガラスリボンに対して接触しない非接触部と、をそれぞれ有してなるガラス物品の製造装置であって、
複数（ｍ個）の前記ローラにおける前記非接触部の軸方向中央部の外径をＤｎ（ただし、最上段のローラから順にｎ＝１，２，…，ｍ）として、
Ｄｎ≧Ｄｎ＋１、かつ、Ｄ１＞Ｄｍ
を満たすように前記各ローラが配置されていることを特徴とするガラス物品の製造装置。
-The above-mentioned embodiment and each modification may be combined suitably.
Next, technical ideas that can be grasped from the above embodiment and another example will be additionally described below.
(A) A forming section for down-flow forming a glass ribbon,
And a plurality of rollers rotating in contact with the glass ribbon flowing down from the forming section,
The plurality of rollers includes a pair of contact portions respectively contacting the widthwise side portions of the glass ribbon, and a non-contact portion which is formed between axial directions of the pair of contact portions and does not contact the glass ribbon. It is a manufacturing apparatus of the glass article which each has,
The outer diameter of the axially central portion of the noncontacting portion of the plurality (m) of the rollers is D n (where n = 1, 2,..., M in order from the uppermost roller),
D n DD n + 1 and D 1 > D m
An apparatus for producing a glass article, wherein each of the rollers is disposed so as to satisfy
この構成によれば、各ローラの非接触部の形状を、成形部から下方に離れるにつれて大きくなるガラスリボンの厚み方向への突出量（膨らみ量）に応じた形状とすることができる。このため、ガラスリボンとローラの非接触部との接触を抑制しつつも、ガラスリボンとローラの非接触部との間に気流が通過することを抑制することができる。 According to this configuration, the shape of the non-contact portion of each roller can be made a shape according to the amount of protrusion (the amount of expansion) in the thickness direction of the glass ribbon, which increases as it moves downward from the forming portion. For this reason, it is possible to suppress the flow of air flow between the glass ribbon and the non-contacting portion of the roller while suppressing the contact between the glass ribbon and the non-contacting portion of the roller.
１１…ガラスリボン製造装置（ガラス物品の製造装置）、１２…成形部、２１，２２，２３…第１〜第３牽引ローラ（ローラ）、２１ｂ，２２ｂ，２３ｂ…接触部、２１ｃ，２２ｃ，２３ｃ…中間部（非接触部）、Ｇ…ガラスリボン。 11: Glass ribbon manufacturing apparatus (glass article manufacturing apparatus) 12, 12: forming unit, 21, 22, 23, first to third pulling rollers (rollers), 21b, 22b, 23b: contact unit, 21c, 22c, 23c ... Middle part (non-contact part), G ... Glass ribbon.
Claims (3)
前記成形部から流下される前記ガラスリボンと接触しつつ回転する複数のローラと
を備え、
前記複数のローラが、前記ガラスリボンの幅方向両側部とそれぞれ接触する一対の接触部と、該一対の接触部の軸方向間に構成され前記ガラスリボンに対して接触しない非接触部と、をそれぞれ有してなるガラス物品の製造装置であって、
前記複数のローラは、第１ローラと、該第１ローラよりも下流側に配置された第２ローラとを備え、
前記第２ローラにおける前記非接触部の軸方向中央部の外径が、前記第１ローラにおける前記非接触部の軸方向中央部の外径よりも小さく構成されていることを特徴とするガラス物品の製造装置。 A forming part for forming the glass ribbon by flow-down,
And a plurality of rollers rotating in contact with the glass ribbon flowing down from the forming section,
The plurality of rollers includes a pair of contact portions respectively contacting the widthwise side portions of the glass ribbon, and a non-contact portion which is formed between axial directions of the pair of contact portions and does not contact the glass ribbon. It is a manufacturing apparatus of the glass article which each has,
The plurality of rollers include a first roller and a second roller disposed downstream of the first roller,
The glass article characterized in that the outer diameter of the axial center portion of the noncontact portion of the second roller is smaller than the outer diameter of the axial center portion of the noncontact portion of the first roller. Production equipment.
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