JP2004122238A - Shaft slippage preventing kit for use in shaping lens for glasses and lens shaping method for glasses using the same - Google Patents

Shaft slippage preventing kit for use in shaping lens for glasses and lens shaping method for glasses using the same Download PDF

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JP2004122238A
JP2004122238A JP2002235490A JP2002235490A JP2004122238A JP 2004122238 A JP2004122238 A JP 2004122238A JP 2002235490 A JP2002235490 A JP 2002235490A JP 2002235490 A JP2002235490 A JP 2002235490A JP 2004122238 A JP2004122238 A JP 2004122238A
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lens
film
kit
shaft member
adhesive tape
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JP3715601B2 (en
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Ryuzo Yamamoto
山本　隆造
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SOLA OPTICAL JAPAN KK
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SOLA OPTICAL JAPAN KK
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
    • B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
    • B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
    • B24B9/08—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass
    • B24B9/14—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of optical work, e.g. lenses, prisms
    • B24B9/146—Accessories, e.g. lens mounting devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/005—Blocking means, chucks or the like; Alignment devices

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Eyeglasses (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shaft slippage preventing kit for preventing slippage between a shaft member and a lens when shaping the lens for glasses with high slippage treated by antifouling in particular and to provide the lens shaping method for the glasses using thereof. <P>SOLUTION: This shaft slippage prevention kit, which is used for preventing the slippage between a shaft member and the lens caused by rotation movement when the lens of the glasses is shaped by coaxially clamping the shaft member from the both sides of a convex and concave surface of the lens for the glasses and rotating it, comprises a film forming agent for forming a film hermetically fixed to the lens surface by being applied on the surface of the lens, a support body having a prescribed strength and an adhesive tape having, at least, adhesive stuck on the film. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、眼鏡用レンズの玉型加工に用いる軸ずれ防止キット及びこれを用いた眼鏡用レンズの玉型加工方法に関し、特に防汚処理が施された眼鏡用レンズの玉型加工に用いる軸ずれ防止キット及びこれを用いた眼鏡用レンズの玉型加工方法に関する。
【０００２】
【従来の技術】
従来から、眼鏡用レンズの表面には、反射防止コートを施すとともに、その上層に撥水性のある薄膜防汚コーティングを施して、レンズへの水垢付着を防止したり、表面滑性の向上により汚れが付きにくく、かつ落とし易くしている。
【０００３】
かかる表面処理が施された眼鏡用レンズは、その形状を眼鏡枠（フレーム）の大きさに合せるために、その外周を砥石等の加工部材で所定形状に加工するいわゆる玉型加工が行なわれる。この玉型加工は、市販の玉型加工機（レンズエッジャー）を用いて行なわれる。かかる玉型加工機を用いた玉型加工の具体例としては、図１に示したように、固定軸１１の先端に合成樹脂製のサクションカップ１２が装着された軸部材１と、固定軸２１の先端に押圧板２２が一体的に接合された軸部材２を、眼鏡用レンズ４の凸面４１と凹面４２の両側からそれぞれ同軸上に配置して押圧して挟み込んで、レンズ４を軸部材１，２で固定し、次いで、軸部材１，２を回転させながら、図示しない砥石等の加工部材を高速回転させた物を用いてレンズ４を所定形状に加工する方法を挙げることができる。
【０００４】
この場合、サクションカップ１２の硬度に応じて、軸部材１とレンズ４の連結力を強化するための接着部材を適宜使用することができる。具体的には、硬度が小さく弾性の大きい、例えばゴム製のサクションカップを使用する場合には、上記固定部材を使用する必要はないが、硬度が大きいサクションカップを用いる場合には、図１に示す接着部材５を介して眼鏡用レンズ４とサクションカップ１２を接着、固定する。かかる接着部材５としては、レンズロックテープと称される両面テープが一般的に使用される。また、軸部材２の先端に一体的に接合されている押圧板２２に対しても、上記の接着部材５を適宜貼着して軸部材２とレンズ４の連結力を強化することもできる。
【０００５】
しかし、上記の防汚コーティングに加えて、指紋が付着するのを防止するため、例えばフッ素系化合物からなる表面滑性を高めるコーティング剤を表面にコーティングした場合には、レンズ表面の非粘着性、低摩擦係数等のレンズ表面の滑性がより一層向上するため、玉型加工中に軸部材とレンズとの間の軸ずれを起こし、これに続いて眼鏡用レンズが欠ける等の問題が発生し、正確な玉型加工が困難になる。
【０００６】
【発明が解決しようとする課題】
本発明は、かかる事情に鑑みてなされたものであり、特に防汚処理が施された滑性の高い眼鏡用レンズを玉型加工する場合において、軸部材とレンズの間の軸ずれを防止するための軸ずれ防止キット、及びこれを用いた眼鏡用レンズの玉型加工方法を提供することを主たる目的とする。
【０００７】
【課題を解決するための手段】
本発明の軸ずれ防止キットは、眼鏡用レンズの凸面と凹面の両側から軸部材で同軸上に挟持、回転させて眼鏡用レンズを玉型加工する場合において、回転運動に伴なう上記軸部材とレンズとの間の軸ずれを防止するために用いられる軸ずれ防止キットであって、上記レンズの表面に塗布することにより、レンズ表面に密着固定される皮膜を形成するための皮膜形成剤と、所定強度を有する支持体と上記皮膜上に貼着可能な粘着剤を少なくとも有する粘着テープと、から構成される。
【０００８】
本発明の軸ずれ防止キットによれば、レンズ表面の滑性を低減させて眼鏡用レンズと玉型加工に用いる軸部材が強固に連結・固定されるため、軸部材を回転駆動させた場合においても、軸部材とレンズとの間の軸ずれが生じることなく玉型加工を正確に行なうことができる。
【０００９】
また、本発明の軸ずれ防止キットは、表面の滑性が高い防汚処理が施された眼鏡用レンズに適用した場合において、その効果が顕著に表れるものであり、特に表面滑性を高めるフッ素系表面防汚コーティング剤により防汚処理が施された場合のように、表面の滑性が著しく高い眼鏡用レンズに対して好適に用いることができる。
【００１０】
また、本発明の軸ずれ防止キットを構成する皮膜形成剤は、合成樹脂と溶剤を含有するものが好適に使用できる。かかる皮膜形成剤によれば、皮膜形成剤の塗布操作が簡易に行なえ、しかも溶剤は数分程度の短時間で揮発するので、眼鏡用レンズに隙間なく密着固定する皮膜を形成することができ、具体的には合成樹脂が酢酸ビニル樹脂であり、溶剤がメタノールである溶剤型の皮膜形成剤が好適に用いられる。
【００１１】
また、本発明の軸ずれ防止キットを構成する粘着テープは、所定強度を有する支持体と上記皮膜上に貼着可能な粘着剤を少なくとも有するものとして構成される。支持体としてはセロハン、アセテート、ポリ塩化ビニル、ポリエチレン、ポリプロピレン、ポリエステル、ポリイミドなどのプラスチック製が好ましく使用でき、セロハンフィルム、ポリエステルフィルムが特に好ましく使用できる。具体的には、本発明において特に好ましい粘着フィルムとしては、ポリエステルフィルムからなる支持体と、シリコーン系樹脂からなる粘着剤とを少なくとも有するものを挙げることができる。
【００１２】
また、本発明の眼鏡用レンズの玉型加工方法は、眼鏡用レンズの凸面と又は必要に応じて凹面に上記皮膜形成剤を塗布、乾燥させることにより、眼鏡用レンズに密着固定された皮膜を形成させた後、この形成された皮膜上に上記粘着テープを貼着し、次いで、この貼着された粘着テープに対して、玉型加工に用いる軸部材を押圧し、眼鏡用レンズの凸面と凹面の両側から軸部材を同軸上に挟持、回転させて所定形状に眼鏡用レンズを加工することを特徴とするものである。
【００１３】
かかる玉型加工方法は、特に通常メガネ小売店にて使用されるべく販売されている玉型加工機に対して広範に適用できるので、眼鏡小売店においても簡易かつ確実に眼鏡用レンズの玉型加工を行なうことができる。
【００１４】
【発明の実施の形態】
本発明の軸ずれ防止キットは、眼鏡用レンズの玉型加工に好適に適用されるものであり、皮膜形成剤と粘着テープとから構成されるものである。
【００１５】
本発明の軸ずれ防止キットが適用される眼鏡用レンズの材質は特に限定されるものではなく、プラスチック製、ガラス製その他の材質を問わずに使用することができる。また、眼鏡用レンズの表面には、反射防止処理、防汚処理、ハードコート、耐衝撃性ハードコート、染色処理、紫外線吸収処理等の様々な表面処理が施されるが、本発明の軸ずれ防止キットは、一般にどのような表面処理が施された場合であっても適用することができ、特に表面の滑性が高いレンズに対して好適に使用することができる。
【００１６】
具体的には、フッ素系表面防汚コーティング剤をコーティングした場合にレンズの表面滑性が著しく向上するので、本発明の軸ずれ防止キットは特にフッ素系化合物からなるコーティング剤で加工が施されたレンズに対して好適に使用することができる。ここで、フッ素系コーティング剤に使用される樹脂としては、４フッ化エチレン樹脂（ＰＴＦＥ）、４フッ化エチレン・６フッ化プロピレン共重合体（ＦＥＰ）、４フッ化エチレン・パーフルオロアルキルビニルエーテル共重合体（ＰＦＡ）、変性ＴＦＥ等が挙げられるが、かかる樹脂によって表面がコーティングされた眼鏡用レンズは、非粘着性や低摩擦特性という特有の特性のため、レンズ表面の滑性が向上したものとなる。
また、シリコーン樹脂を主成分とするシリコーン系表面防汚コーティング剤をコーティングした場合にもレンズの表面滑性が向上するので、本発明の軸ずれ防止キットは、かかるコーティング剤で加工が施されたレンズに対しても好適に使用することができる。
【００１７】
ここで、レンズの表面滑性は、例えば図２に示す試験方法を用いることにより簡便に評価することができる。具体的には、図１で説明した固定軸１１の先端に装着されたサクションカップ１２に対して両面テープ５（商品名；Ｌｅａｐ　ＩＩ　Ｆｉｎｉｓｈ　Ｂｌｏｃｋｉｎｇ　Ｐａｄｓ，３Ｍ製）の一方の接着面を貼着し、他方の接着面をレンズ４の凸面４１に貼着して軸部材１とレンズ４を固定する。次に中央部にレンズ４を収容可能な開口を有する所定重量の嵌め込み枠６に紐６１を介して２ｋｇの重りを取り付け、この嵌め込み枠６にレンズ４をセットし、レンズ４から両面テープ５が剥がれ落ちるまでの時間を測定する。剥離時間が３０秒以上であれば表面滑性は通常程度であり、市販の玉型加工機を用いても通常の方法で正確な玉型加工を行なうことができる。一方、剥離時間が３０秒未満の場合には、レンズ表面の滑性が高くなるため、市販の玉型加工機を用いても玉型加工を正確に行なうことが困難になる。一般的に、レンズ表面に上記のフッ素系表面コーティング剤で加工を施すと、剥離時間が３０秒未満になる。
【００１８】
本発明の軸ずれ防止キットを構成する皮膜形成剤は、眼鏡用レンズの表面滑性を低減させる役割を有するものであり、合成樹脂と溶剤を構成成分として含有するものである。この皮膜形成剤は、レンズ表面に塗布した場合に、溶剤が揮発して合成樹脂がフィルム状の膜としてレンズ表面に固着されたものとなる。
【００１９】
皮膜形成剤を構成する合成樹脂と溶剤は、通常の溶剤含有型の固着剤に用いられるものであれば好適に使用することができ、特に限定されるものではないが、作業性の観点から溶剤の揮発時間としては、１０分以内が好ましく、５分以内が更に好ましく、３分以内が特に好ましい。上記皮膜形成剤は、被着体に対して特に強い接着力が必要とされるわけではなく、例えばネジの緩み止めなどに用いられるロック剤程度の接着力を有するものでも本発明に好適に使用することができる。かかる性能を有する皮膜形成剤としては、合成樹脂として酢酸ビニル樹脂、溶剤としてメタノールを含有するものを挙げることができる。
【００２０】
かかる皮膜形成剤は、眼鏡用レンズの凸面のみに用いることもできるし、凸面と凹面の両側に用いることもできる。具体的には、眼鏡用レンズの凸面（必要に応じて凹面）の中心部分に皮膜形成剤を１滴ないし数滴滴下し、レンズの玉型加工に用いる軸部材で眼鏡用レンズが押圧される部分よりも広い面積、例えば２ｃｍ２乃至５０ｃｍ２程度の大きさに、筆や指先などを用いて薄く広げるように塗布して使用することが好ましい。溶剤が揮発すると、レンズ表面に密着固定された皮膜が形成される。本発明では、皮膜形成剤は、上記の合成樹脂と溶剤を任意に調合して用いてもよいし、市販の固着剤をそのまま用いてもよい。市販品を用いる場合には、例えば（株）スリーボンド製のスリーボンド１４０１が好適に使用できる。
【００２１】
本発明の軸ずれ防止キットを構成する粘着テープは、玉型加工に用いる軸部材を回転した場合に生じる応力に対して、上記皮膜形成剤によって形成された皮膜を保護、補強し、且つレンズとサクションカップの連結力を高める役割を有するものであり、所定強度を有する支持体と、この支持体の上下二面のうち、一方の面に上記皮膜上に貼着可能な粘着剤が塗布されたものが好ましく用いられる。
【００２２】
支持体としては、例えば紙、布、プラスチック、ゴムシート、発泡体、金属箔等が好適に使用できるものとして挙げられるが、本発明では、支持体の強度の点から、セロハン、アセテート、ポリ塩化ビニル、ポリエチレン、ポリプロピレン、ポリエステル、ポリイミドなどを原料樹脂とするプラスチックフィルムが更に好ましく使用でき、セロハンフィルム、ポリエステルフィルムが特に好ましく使用できる。
【００２３】
また、粘着剤としては、アクリル系粘着剤、シリコーン系粘着剤、天然ゴム、スチレン−ブタジエンゴム、イソブチレンゴム、イソプレンゴム、スチレン−イソプレンブロック共重合体、スチレン−ブタジエンブロック共重合体等のゴム系粘着剤であって、上記の皮膜に対して貼着可能な粘着性を有するものであれば特に限定されることなく使用できる。具体的には、本発明では、ポリエステルフィルムからなる支持体と、シリコーン系粘着剤からなる粘着剤の組み合わせからなる粘着シートが好適に使用できる。
【００２４】
なお、本発明に適用できる粘着テープとしては、上記の粘着剤が塗布されていない支持体面に、例えば剥離剤が塗布されたものを用いることもできる。かかる層構成を有する粘着テープを用いれば、長尺の巻物として使用できるので、使用上都合がよい。具体的には、支持体としてセロハンを使用し、粘着剤として天然ゴムを使用したセロハンテープ（商品名；セロテープ（登録商標），ニチバン（株）製）、支持体としてポリエステルフィルムを使用し、粘着剤としてシリコーン系粘着剤を使用した粘着テープ（商品名；スリオンテープ，（株）スリオンテック製）、その他粘着シート（商品名；ファスカル，（株）ベル春日井製）が好ましく使用できる。
【００２５】
粘着テープを使用する場合には、粘着テープを構成する粘着剤が塗布された面を、上記皮膜の形成された部分に貼り合わせて、粘着テープを皮膜に固定することにより行なう。図３は、本発明の軸ずれ防止キットを用いた場合において、眼鏡用レンズに対して形成、固着された皮膜７と粘着テープ８の一例を示したものである。なお、粘着テープの幅、長さ、形状は、玉型加工の対象となる眼鏡用レンズの表面滑性、度数、カーブ等に適合するように任意に設計することができる。例えば、表面滑性の非常に高いレンズや度数が高くコバの厚いレンズを用いる場合には、幅３ｃｍ以上、長さ５ｃｍ程度の粘着テープを、レンズの仕上がり横方向にして皮膜形成部分からはみ出ないように貼り付けることが好ましい。また、これだけでは不十分と思われる場合には、レンズの仕上がり縦方向にも上記と同様の大きさの粘着テープを貼り付けることが好ましい。
【００２６】
本発明は、眼鏡用レンズに対して上記の軸ずれ防止手段を講じた後、市販の玉型加工機を用いて玉型加工を行なうものである。市販の玉型加工機としては、眼鏡レンズ用レンズエッジャー機として販売され、眼鏡小売店等で使用されている機械を用いればよく、製造メーカーとしては、例えばニデック製、トプコン製、ホヤ製、ウェコ−製、ブリオ製、タクボ精機製、富士製、グランド精工製を例示することができる。
【００２７】
本発明における軸ずれ防止効果は、皮膜と粘着テープの存在により初めて発揮されるものである。すなわち、皮膜だけでは玉型加工に用いる軸部材の回転に対して強度が十分ではないので、玉型加工中に皮膜が破損してしまう。一方、粘着テープだけでは、凸面と又は必要に応じて凹面を有するレンズ表面に隙間なく密着することができないので、粘着テープにシワが発生して軸ずれ防止効果が不十分になる。
【００２８】
【実施例】
以下、本発明を実施例によりさらに詳細に説明する。
（実施例１）
以下に示す眼鏡用レンズの凸面の中心部分に被膜形成剤を２滴滴下し、この滴下された被膜形成剤を直径５０ｍｍ程度の円になるように指先で薄く広げた。皮膜が形成されるまで約３分待ち、次いで幅３５ｍｍ、長さ３５ｍｍの粘着テープを皮膜面上に圧着した。続いて、ニデック製のレンズエッジャーを用いて眼鏡用レンズの玉型加工を行ない、玉型加工中に軸部材とレンズとの間の軸ずれが生じるか否かを観察した。なお、本実施例では、凸面用軸部材の先端に装着されたサクションカップに通称レンズロックテープと言われる両面テープの一方面を貼着し、他方の面を上記の粘着テープの剥離層に貼着して、凸面用軸部材と眼鏡用レンズを固定した。また、凹面用軸部材の先端に上記レンズロックテープの一方面を貼着し、他方の面をレンズの凹面に貼着して、凹面用軸部材と眼鏡用レンズを固定した。
【００２９】
［眼鏡用レンズ］
直径７０ｍｍの円形の眼鏡用レンズの凸面と凹面の全面にわたりフッ素系防汚コーティングが施された、マイナス６．００Ｄの高度数のレンズを１０枚用意した。
［皮膜形成剤］
合成樹脂として変性酢酸ビニル樹脂を２５〜３５重量％、溶剤としてメタノールを６５〜７５％含有する皮膜形成剤を使用した（商品名：ＴｈｒｅｅＢｏｎｄ１４０１，（株）スリーボンド製）。
［粘着テープ］
シリコーン系粘着剤、ＰＥＴフィルムからなる支持体、剥離層を備えた粘着テープを使用した（商品名；スリオンテープＮｏ．６２６３−５０，（株）スリオンテック製）。
［両面テープ］
玉型加工に通常用いられるレンズロックテープ（商品名；Ｌｅａｐ　ＩＩ　Ｆｉｎｉｓｈ　Ｂｌｏｃｋｉｎｇ　Ｐａｄｓ，３Ｍ製）を用いた。
【００３０】
（比較例１）
眼鏡用レンズの凸面に皮膜形成剤のみを貼着した以外は実施例１と同様に行なった。
（比較例２）
眼鏡用レンズの凸面に粘着テープのみを貼着した以外は実施例１と同様に行なった。
【００３１】
実施例１では、玉型加工中の軸部材とレンズの間の軸ずれは眼鏡用レンズ１０枚全てについて発生しなかった。一方、比較例１では、玉型加工中に眼鏡用レンズ１０枚全てについて、形成された皮膜が破損し、軸部材とレンズの間の軸ずれが発生し、比較例２では、玉型加工中に眼鏡用レンズ１０枚全てについて、粘着テープに数本のシワが発生し、軸部材とレンズの間の軸ずれが発生した。以上の結果より、本発明の軸ずれ防止キットは、皮膜と粘着テープが協同して軸ずれ防止効果を発揮することが確認された。
【００３２】
また、玉型加工終了後、実施例１の粘着テープを指で摘んで剥がすとその下層の皮膜も接着跡を残すことなく同時にレンズ表面から剥れた。このことより、本発明の軸ずれ防止キットは後処理を要しないので、作業性に優れた玉型加工方法を提供できることが確認された。
【００３３】
【発明の効果】
以上説明したように、本発明の軸ずれ防止キットによれば、レンズ表面の滑性を低減させて眼鏡用レンズと玉型加工に用いる軸部材が強固に連結・固定されるため、軸部材を回転駆動させた場合においても、軸部材とレンズとの間の軸ずれが生じることなく玉型加工を正確に行なうことができる。
【図面の簡単な説明】
【図１】玉型加工機を用いた眼鏡用レンズの玉型加工の具体例を示す正面図である。
【図２】眼鏡用レンズの表面滑性を評価する試験方法を示した図である。
【図３】本発明の軸ずれ防止キットを用いてレンズ表面に皮膜と粘着テープを形成、貼着した一実施例を示す図である。
【符号の説明】
１　軸部材
１１　固定軸
１２　サクションカップ
２　軸部材
２１　固定軸
２２　押圧板
４　眼鏡用レンズ
４１　凸面
４２　凹面
５　接着部材
６　嵌め込み枠
６１　紐
７　皮膜
８　粘着テープ[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an anti-axis misalignment kit used for edging a spectacle lens and a method for edging a spectacle lens using the same, and in particular, an axis used for edging a spectacle lens that has been subjected to antifouling treatment. The present invention relates to a shift prevention kit and a method for processing an eyeglass lens using the kit.
[0002]
[Prior art]
Conventionally, an anti-reflective coating has been applied to the surface of spectacle lenses, and a water-repellent thin film anti-fouling coating has been applied to the upper layer to prevent water stains on the lens and to improve the surface lubricity by improving surface lubricity. It is hard to stick and easy to drop.
[0003]
In order to match the shape of the spectacle lens having been subjected to the surface treatment to the size of the spectacle frame (frame), a so-called edging process in which the outer periphery is processed into a predetermined shape by a processing member such as a grindstone is performed. This edging is performed using a commercially available edging machine (lens edger). As a specific example of edging using such an edging machine, as shown in FIG. 1, a shaft member 1 in which a synthetic resin suction cup 12 is attached to the tip of a fixed shaft 11, and a fixed shaft 21. The shaft member 2 with the pressing plate 22 integrally joined to the tip of the lens is arranged coaxially from both sides of the convex surface 41 and the concave surface 42 of the lens for spectacles 4 and pressed and sandwiched. , 2 and then, while rotating the shaft members 1 and 2, processing the lens 4 into a predetermined shape using an object obtained by rotating a processing member such as a grindstone (not shown) at a high speed.
[0004]
In this case, an adhesive member for enhancing the connection force between the shaft member 1 and the lens 4 can be appropriately used according to the hardness of the suction cup 12. Specifically, when using a suction cup made of rubber having low hardness and high elasticity, for example, a rubber suction cup, it is not necessary to use the fixing member, but when using a suction cup having high hardness, FIG. The eyeglass lens 4 and the suction cup 12 are bonded and fixed via the bonding member 5 shown. As the adhesive member 5, a double-sided tape called a lens lock tape is generally used. Further, the above-mentioned adhesive member 5 can be appropriately adhered to the pressing plate 22 integrally joined to the tip of the shaft member 2 to enhance the coupling force between the shaft member 2 and the lens 4.
[0005]
However, in addition to the above-described antifouling coating, in order to prevent fingerprints from adhering, for example, when the surface is coated with a coating agent made of a fluorine-based compound that enhances surface lubricity, non-adhesiveness of the lens surface, Since the smoothness of the lens surface such as a low coefficient of friction is further improved, an axis shift occurs between the shaft member and the lens during the edging, and subsequently, a problem such as a chipping of the eyeglass lens occurs. And accurate edging becomes difficult.
[0006]
[Problems to be solved by the invention]
The present invention has been made in view of the above circumstances, and particularly in the case of processing a lens having a high lubricity that has been subjected to an antifouling treatment, in the case of lens-shaped processing, it is intended to prevent the axial displacement between the shaft member and the lens. The main object of the present invention is to provide an axis deviation prevention kit for the same and a method for processing an eyeglass lens using the kit.
[0007]
[Means for Solving the Problems]
The axis deviation prevention kit of the present invention is characterized in that the shaft member accompanying the rotational movement is used when the eyeglass lens is shaped by being coaxially pinched and rotated by a shaft member from both sides of the convex and concave surfaces of the eyeglass lens. An anti-axis deviation kit used to prevent axial deviation between the lens and the lens, by applying to the surface of the lens, a film forming agent for forming a film adhered and fixed to the lens surface And a pressure-sensitive adhesive tape having at least a pressure-sensitive adhesive that can be stuck on the film.
[0008]
According to the shaft deviation prevention kit of the present invention, the eyeglass lens and the shaft member used for edging are firmly connected and fixed by reducing the smoothness of the lens surface, so that when the shaft member is rotationally driven, In addition, it is possible to accurately perform the edging without causing the axial displacement between the shaft member and the lens.
[0009]
The anti-axis misalignment kit of the present invention has a remarkable effect when applied to a spectacle lens that has been subjected to an antifouling treatment with a high surface lubricity, and is particularly effective in improving the surface lubricity. It can be suitably used for a spectacle lens having extremely high surface smoothness, such as when antifouling treatment is performed with a system surface antifouling coating agent.
[0010]
Further, as the film forming agent constituting the anti-axis misalignment kit of the present invention, those containing a synthetic resin and a solvent can be suitably used. According to such a film forming agent, the coating operation of the film forming agent can be easily performed, and since the solvent is volatilized in a short time of about several minutes, it is possible to form a film which is tightly fixed to the spectacle lens without any gap, Specifically, a solvent-type film-forming agent in which the synthetic resin is a vinyl acetate resin and the solvent is methanol is suitably used.
[0011]
Further, the pressure-sensitive adhesive tape constituting the kit for preventing misalignment of the present invention is configured to have at least a support having a predetermined strength and a pressure-sensitive adhesive that can be stuck on the film. As the support, plastics such as cellophane, acetate, polyvinyl chloride, polyethylene, polypropylene, polyester, and polyimide can be preferably used, and cellophane films and polyester films can be particularly preferably used. Specifically, a particularly preferred pressure-sensitive adhesive film in the present invention includes a film having at least a support made of a polyester film and a pressure-sensitive adhesive made of a silicone resin.
[0012]
In addition, the method of edging a spectacle lens of the present invention includes coating the film-forming agent on the convex surface of the spectacle lens and / or the concave surface thereof as necessary, and drying the film to form a film adhered and fixed to the spectacle lens. After being formed, the above-mentioned pressure-sensitive adhesive tape is stuck on the formed film, and then the shaft member used for edging is pressed against the stuck pressure-sensitive adhesive tape, and the convex surface of the lens for eyeglasses is pressed. The present invention is characterized in that a shaft member is coaxially held and rotated from both sides of a concave surface to form a spectacle lens into a predetermined shape.
[0013]
Such an edging method can be applied to a wide range of edging machines, which are usually sold to be used at eyeglass retail stores, so that eyeglass lens eyeglass lenses can be easily and reliably used even at eyeglass retail stores. Processing can be performed.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
The misalignment prevention kit of the present invention is suitably applied to edging of spectacle lenses, and includes a film forming agent and an adhesive tape.
[0015]
The material of the spectacle lens to which the anti-axis misalignment kit of the present invention is applied is not particularly limited, and it can be used irrespective of plastic, glass, or other materials. In addition, the surface of the spectacle lens is subjected to various surface treatments such as an antireflection treatment, an antifouling treatment, a hard coat, an impact-resistant hard coat, a dyeing treatment, and an ultraviolet absorption treatment. In general, the prevention kit can be applied to any surface treatment, and can be suitably used particularly for a lens having a high surface smoothness.
[0016]
Specifically, when coated with a fluorine-based antifouling coating agent, since the surface lubrication of the lens is significantly improved, the anti-axis misalignment kit of the present invention is particularly processed with a coating agent composed of a fluorine-based compound. It can be suitably used for lenses. Here, as the resin used for the fluorine-based coating agent, tetrafluoroethylene resin (PTFE), tetrafluoroethylene / hexafluoropropylene copolymer (FEP), tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer Polymers (PFA), modified TFE, etc., are mentioned. The spectacle lens whose surface is coated with such a resin has improved slipperiness on the lens surface due to its unique properties of non-adhesion and low friction properties. It becomes.
Further, since the surface lubricity of the lens is improved even when coated with a silicone-based antifouling coating agent containing a silicone resin as a main component, the axis deviation prevention kit of the present invention is processed with such a coating agent. It can also be suitably used for lenses.
[0017]
Here, the surface smoothness of the lens can be easily evaluated by using, for example, a test method shown in FIG. Specifically, one adhesive surface of double-sided tape 5 (trade name; manufactured by Leap II Finish Blocking Pads, 3M) is attached to suction cup 12 attached to the tip of fixed shaft 11 described in FIG. The other adhesive surface is adhered to the convex surface 41 of the lens 4 to fix the shaft member 1 and the lens 4. Next, a 2 kg weight is attached via a cord 61 to a fitting frame 6 of a predetermined weight having an opening capable of accommodating the lens 4 at the center, and the lens 4 is set in the fitting frame 6. Measure the time until peeling off. If the peeling time is 30 seconds or more, the surface lubrication is normal, and accurate edging can be performed by a normal method using a commercially available edging machine. On the other hand, when the peeling time is less than 30 seconds, the smoothness of the lens surface becomes high, so that it is difficult to accurately perform edging even with a commercially available edging machine. Generally, when the lens surface is processed with the above-mentioned fluorine-based surface coating agent, the peeling time becomes less than 30 seconds.
[0018]
The film-forming agent constituting the anti-axis misalignment kit of the present invention has a role of reducing the surface lubricity of the spectacle lens, and contains a synthetic resin and a solvent as constituent components. When the film forming agent is applied to the lens surface, the solvent volatilizes and the synthetic resin is fixed to the lens surface as a film-like film.
[0019]
The synthetic resin and the solvent constituting the film-forming agent can be suitably used as long as they are used for a usual solvent-containing fixing agent, and are not particularly limited. Is preferably within 10 minutes, more preferably within 5 minutes, particularly preferably within 3 minutes. The film-forming agent does not necessarily require a particularly strong adhesive force to the adherend. For example, a film-forming agent having an adhesive force similar to that of a lock agent used for preventing loosening of a screw is preferably used in the present invention. can do. Examples of the film-forming agent having such performance include those containing a vinyl acetate resin as a synthetic resin and methanol as a solvent.
[0020]
Such a film forming agent can be used only on the convex surface of the spectacle lens, or can be used on both sides of the convex and concave surfaces. Specifically, one or a few drops of a film forming agent are dropped on the central portion of the convex surface (concave surface as necessary) of the spectacle lens, and the spectacle lens is pressed by a shaft member used for edging the lens. It is preferable to apply and use a brush or a fingertip so as to spread it thinly over an area larger than the portion, for example, about 2 cm 2 to 50 cm 2 . When the solvent evaporates, a film adhered and fixed to the lens surface is formed. In the present invention, as the film forming agent, the above-mentioned synthetic resin and solvent may be arbitrarily mixed and used, or a commercially available fixing agent may be used as it is. When a commercially available product is used, for example, Three Bond 1401 manufactured by Three Bond Co., Ltd. can be suitably used.
[0021]
The pressure-sensitive adhesive tape that constitutes the anti-axis deviation kit of the present invention protects and reinforces the film formed by the film-forming agent against stress generated when a shaft member used for edging is rotated, and forms a lens and It has a role of increasing the coupling force of the suction cup, a support having a predetermined strength, and an adhesive capable of being stuck on the film is applied to one of the upper and lower two surfaces of the support. Are preferably used.
[0022]
As the support, for example, paper, cloth, plastic, rubber sheet, foam, metal foil and the like can be suitably used. In the present invention, cellophane, acetate, polychlorinated, etc. are used in view of the strength of the support. A plastic film using vinyl, polyethylene, polypropylene, polyester, polyimide or the like as a raw material resin can be more preferably used, and a cellophane film or a polyester film can be particularly preferably used.
[0023]
Examples of the pressure-sensitive adhesive include acrylic pressure-sensitive adhesives, silicone-based pressure-sensitive adhesives, natural rubber, styrene-butadiene rubber, isobutylene rubber, isoprene rubber, styrene-isoprene block copolymer, and styrene-butadiene block copolymer. Any pressure-sensitive adhesive can be used without particular limitation as long as the pressure-sensitive adhesive has an adhesive property that can be adhered to the above-mentioned film. Specifically, in the present invention, a pressure-sensitive adhesive sheet composed of a combination of a support composed of a polyester film and a pressure-sensitive adhesive composed of a silicone-based pressure-sensitive adhesive can be suitably used.
[0024]
In addition, as the pressure-sensitive adhesive tape applicable to the present invention, a tape in which a release agent is applied to the surface of the support on which the above-mentioned pressure-sensitive adhesive is not applied may be used. If the pressure-sensitive adhesive tape having such a layer configuration is used, it can be used as a long scroll, which is convenient for use. Specifically, a cellophane tape (trade name; Cellotape (registered trademark), manufactured by Nichiban Co., Ltd.) using cellophane as a support and natural rubber as an adhesive, a polyester film as a support, Adhesive tape (trade name; Slion Tape, manufactured by Sliontec Co., Ltd.) using a silicone-based adhesive as an agent, and other adhesive sheets (trade name: Fascal, manufactured by Bell Kasugai) can be preferably used.
[0025]
When an adhesive tape is used, the surface of the adhesive tape to which the adhesive is applied is attached to a portion where the film is formed, and the adhesive tape is fixed to the film. FIG. 3 shows an example of the coating 7 and the adhesive tape 8 formed and fixed to the spectacle lens in the case where the anti-axis shift kit of the present invention is used. The width, length, and shape of the pressure-sensitive adhesive tape can be arbitrarily designed so as to conform to the surface smoothness, power, curve, and the like of the eyeglass lens to be subjected to the edging. For example, when using a lens having a very high surface lubricity or a lens having a high degree of power and a thick edge, an adhesive tape having a width of 3 cm or more and a length of about 5 cm does not protrude from the film forming portion in the finished lateral direction of the lens. It is preferable to stick it as follows. If this alone is not considered sufficient, it is preferable to attach an adhesive tape having the same size as above in the finished longitudinal direction of the lens.
[0026]
According to the present invention, after taking the above-described means for preventing axial misalignment of a spectacle lens, edging is performed using a commercially available edging machine. As a commercially available edging machine, a machine that is sold as a lens edger machine for spectacle lenses and used at eyeglass retail stores and the like may be used, and as a manufacturer, for example, Nidek, Topcon, Hoya, Examples include Weco, Brio, Takubo Seiki, Fuji, and Grand Seiko products.
[0027]
The effect of preventing misalignment in the present invention is first exhibited by the presence of the film and the adhesive tape. That is, the film alone is not strong enough to rotate the shaft member used for edging, so that the film is damaged during the edging. On the other hand, the pressure-sensitive adhesive tape alone cannot closely adhere to the convex surface or, if necessary, the lens surface having the concave surface, so that the pressure-sensitive adhesive tape is wrinkled, and the effect of preventing misalignment becomes insufficient.
[0028]
【Example】
Hereinafter, the present invention will be described in more detail with reference to Examples.
(Example 1)
Two drops of a film forming agent were dropped on the central portion of the convex surface of the spectacle lens described below, and the dropped film forming agent was spread thinly with a fingertip so as to form a circle having a diameter of about 50 mm. It waited for about 3 minutes until the film was formed, and then pressure-sensitive adhesive tape having a width of 35 mm and a length of 35 mm was pressed on the film surface. Subsequently, edging of the lens for spectacles was performed using a lens edger made by Nidek, and it was observed whether or not the axis deviation between the shaft member and the lens occurred during the edging. In the present embodiment, one side of a double-sided tape commonly called a lens lock tape is attached to a suction cup attached to the tip of the convex shaft member, and the other surface is attached to the release layer of the adhesive tape. Then, the convex shaft member and the spectacle lens were fixed. In addition, one surface of the lens lock tape was adhered to the tip of the concave shaft member, and the other surface was adhered to the concave surface of the lens, thereby fixing the concave shaft member and the spectacle lens.
[0029]
[Lens for glasses]
Ten lenses having an altitude of minus 6.00 D, in which a fluorine-based antifouling coating was applied to the entire surface of the convex and concave surfaces of a circular eyeglass lens having a diameter of 70 mm, were prepared.
[Film forming agent]
A film-forming agent containing 25 to 35% by weight of a modified vinyl acetate resin as a synthetic resin and 65 to 75% of methanol as a solvent was used (trade name: ThreeBond 1401, manufactured by Three Bond Co., Ltd.).
[Adhesive tape]
A pressure-sensitive adhesive tape provided with a silicone-based pressure-sensitive adhesive, a support made of a PET film, and a release layer was used (trade name: Slion Tape No. 6263-50, manufactured by Sliontec Co., Ltd.).
[Double-sided tape]
A lens lock tape (trade name; manufactured by Leap II Finnish Blocking Pads, 3M) usually used for edging was used.
[0030]
(Comparative Example 1)
The procedure was performed in the same manner as in Example 1 except that only the film forming agent was adhered to the convex surface of the spectacle lens.
(Comparative Example 2)
The procedure was performed in the same manner as in Example 1 except that only the adhesive tape was attached to the convex surface of the spectacle lens.
[0031]
In Example 1, no axial deviation between the shaft member and the lens during the edging occurred for all of the ten spectacle lenses. On the other hand, in Comparative Example 1, the coating formed on all ten spectacle lenses was damaged during the edging, resulting in axial misalignment between the shaft member and the lens. For all of the ten spectacle lenses, several wrinkles were generated on the adhesive tape, and axial displacement between the shaft member and the lens occurred. From the above results, it was confirmed that the axis deviation prevention kit of the present invention exerts the axis deviation prevention effect in cooperation of the film and the adhesive tape.
[0032]
After the edging, the pressure-sensitive adhesive tape of Example 1 was picked with a finger and peeled off, and the underlying film was simultaneously peeled off the lens surface without leaving any trace of adhesion. From this, it was confirmed that the post-processing is not required for the misalignment prevention kit of the present invention, so that an edging method excellent in workability can be provided.
[0033]
【The invention's effect】
As described above, according to the shaft deviation prevention kit of the present invention, the eyeglass lens and the shaft member used for edging are firmly connected and fixed by reducing the smoothness of the lens surface. Even in the case of rotational driving, it is possible to accurately perform edging without causing a shaft deviation between the shaft member and the lens.
[Brief description of the drawings]
FIG. 1 is a front view showing a specific example of edging of an eyeglass lens using an edging machine.
FIG. 2 is a view showing a test method for evaluating the surface smoothness of a spectacle lens.
FIG. 3 is a view showing an embodiment in which a film and an adhesive tape are formed and adhered on the lens surface using the anti-axis shift kit of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Shaft member 11 Fixed shaft 12 Suction cup 2 Shaft member 21 Fixed shaft 22 Press plate 4 Eyeglass lens 41 Convex surface 42 Concave surface 5 Adhesive member 6 Fitting frame 61 String 7 Film 8 Adhesive tape

Claims (8)

眼鏡用レンズの凸面と凹面の両側から軸部材で同軸上に挟持、回転させて眼鏡用レンズを玉型加工する場合において、回転運動に伴なう前記軸部材とレンズとの間の軸ずれを防止するために用いられる軸ずれ防止キットであって、
前記レンズの表面に塗布することにより、レンズ表面に密着固定される皮膜を形成するための皮膜形成剤と、
所定強度を有する支持体と前記皮膜上に貼着可能な粘着剤を少なくとも有する粘着テープと、
から構成される軸ずれ防止キット。In the case where the eyeglass lens is coaxially pinched and rotated by the shaft member from both sides of the convex and concave surfaces of the spectacle lens, and the eyeglass lens is processed by rotation, the axial displacement between the shaft member and the lens accompanying the rotational motion is reduced. It is an axis misalignment prevention kit used for prevention,
By applying to the surface of the lens, a film forming agent for forming a film that is adhered and fixed to the lens surface,
A pressure-sensitive adhesive tape having at least a pressure-sensitive adhesive that can be adhered to the support and the film having a predetermined strength,
Axis misalignment prevention kit consisting of 眼鏡用レンズは防汚処理が施されたものである請求項１に記載の軸ずれ防止キット。The kit according to claim 1, wherein the spectacle lens has been subjected to antifouling treatment. 眼鏡用レンズはフッ素系表面防汚コーティング剤により表面滑性を高める防汚処理が施されたものである請求項１に記載の軸ずれ防止キット。2. The anti-axis misalignment kit according to claim 1, wherein the spectacle lens has been subjected to an antifouling treatment for enhancing surface lubricity by a fluorine-based antifouling coating agent. 皮膜形成剤は合成樹脂と溶剤を含有するものである請求項１から請求項３のいずれかに記載の軸ずれ防止キット。The kit for preventing misalignment according to any one of claims 1 to 3, wherein the film forming agent contains a synthetic resin and a solvent. 合成樹脂が酢酸ビニル樹脂であり、溶剤がメタノールである請求項４に記載の軸ずれ防止キット。The kit according to claim 4, wherein the synthetic resin is a vinyl acetate resin and the solvent is methanol. 粘着テープを構成する支持体が、セロハン、アセテート、ポリ塩化ビニル、ポリエチレン、ポリプロピレン、ポリエステル、ポリイミドなどのプラスチック製である請求項１から請求項５のいずれかに記載の軸ずれ防止キット。The misalignment prevention kit according to any one of claims 1 to 5, wherein the support constituting the adhesive tape is made of a plastic such as cellophane, acetate, polyvinyl chloride, polyethylene, polypropylene, polyester, or polyimide. 粘着テープが、ポリエステルフィルムからなる支持体と、シリコーン系樹脂からなる粘着剤とを少なくとも有するものである請求項１から請求項５のいずれかに記載の軸ずれ防止キット。The misalignment prevention kit according to any one of claims 1 to 5, wherein the adhesive tape has at least a support made of a polyester film and an adhesive made of a silicone resin. 眼鏡用レンズの凸面と又は必要に応じて凹面に前記皮膜形成剤を塗布、乾燥させることにより、眼鏡用レンズに密着固定された皮膜を形成させた後、この形成された皮膜上に前記粘着テープを貼着し、
次いで、この貼着された粘着テープに対して、玉型加工に用いる軸部材を押圧し、眼鏡用レンズの凸面と凹面の両側から軸部材を同軸上に挟持、回転させて所定形状に眼鏡用レンズを加工することを特徴とする請求項１から請求項７のいずれかに記載の軸ずれ防止キットを用いた眼鏡用レンズの玉型加工方法。The film forming agent is applied to the convex surface of the spectacle lens and / or the concave surface if necessary, and dried to form a film adhered and fixed to the spectacle lens, and then the adhesive tape is formed on the formed film. Affix,
Next, the shaft member used for edging is pressed against the adhered adhesive tape, and the shaft member is coaxially pinched and rotated from both sides of the convex surface and the concave surface of the lens for spectacles, and rotated for a predetermined shape. A lens processing method for an eyeglass lens using the kit for preventing axial misalignment according to any one of claims 1 to 7, wherein the lens is processed.
JP2002235490A 2002-08-05 2002-08-13 Axis misalignment prevention kit for use in eyeglass lens processing and eyeglass lens processing method using the same Expired - Fee Related JP3715601B2 (en)

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KR20020071071A KR100573553B1 (en) 2002-08-05 2002-11-15 Kit for preventing axial misalignment during lens type process and method of lens type process using kit

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