【０００１】
【発明の属する技術分野】
本発明は、屈折率分布型ロッドレンズ等の円柱体の両端面を複数個同時に処理するのに使用される円柱体ホルダに関する。
【０００２】
【従来の技術】
このような円柱体ホルダとして、特公平３−１４５９０号公報等に開示されたものがある。この円柱体ホルダは、円柱体（屈折率分布型ロッドレンズ）を支持する複数のＶ溝を上面に設けた受け具と、円柱体に当接する緩衝材（金属パイプ）と、これらを交互に配置して積層した状態で、その積層方向に弾圧固定する弾圧部材とからなる。
【０００３】
このような円柱体ホルダは、例えば、円柱体としての屈折率分布型ロッドレンズに付加価値をつけるために、ロッドレンズの両端面を複数個同時に洗浄し、光学膜を成膜する際に使用される。この光学膜に使用される成膜材料の多くは、ＳｉＯ２，ＴｉＯ２，Ｔａ２Ｏ５，Ａｌ２Ｏ３等の絶縁性材料である。
【０００４】
【発明が解決しようとする課題】
ところで、上記従来技術では、次のような問題点がある。
（１）複数のロッドレンズは、その下方に位置する受け具の複数のＶ溝と、その上方に位置する緩衝材（金属パイプ）とで挟持されるので、各ロッドレンズの両側には隙間ができ、この隙間から前記成膜材料が侵入して各ロッドレンズの外周面に付着する。このため、ロッドレンズの外周面に金属メッキ加工を施してある場合、絶縁性材料である成膜材料が各ロッドレンズの外周面に形成した金属膜に付着した部分では、ロッドレンズの外周面と金属製ホルダの内周面とを半田で固定できなくなってしまう。
【０００５】
（２）ロッドレンズの外周面と金属製ホルダの内周面とを半田で固定しない場合にも、ロッドレンズの外周面に成膜材料が部分的に付着するのは好ましくない。
【０００６】
本発明は、このような従来の問題点に着目してなされたもので、円柱体の両端面を複数個同時に洗浄し光学膜等を成膜する場合に、円柱体の外周面に成膜材料等の物質が付着するのを抑制できる円柱体ホルダを提供することにある。
【０００７】
【課題を解決するための手段】
上記課題を解決するために、請求項１に係る発明は、複数の円柱体を並列に位置決めする複数の凹溝を有する複数の受け具と、前記複数の円柱体を前記複数の凹溝に載置して複数の円柱体と前記受け具を交互に重ねた状態で、前記複数の円柱体を押圧固定する付勢手段とを備える円柱体ホルダにおいて、前記受け具には、前記複数の凹溝として、前記円柱体の直径と同一或いはそれより大きい直径を有する複数の半円形溝が形成されており、前記複数の円柱体が、上下に重なる２つの前記受け具間で、下方にある前記受け具の複数の半円形溝と、上方にある前記受け具の複数の半円形溝とで挟持されるように構成したことを要旨とする。
【０００８】
この構成によれば、複数の円柱体が、上下に重なる２つの受け具間で、下方にある受け具の複数の半円形溝と、上方にある受け具の複数の半円形溝とで挟持される。こうして、各円柱体が、上下に重なる２つの受け具の各半円形溝間に挟持されるように、複数の円柱体と受け具を交互に重ねた状態で、複数の円柱体が付勢手段により押圧固定される。このように押圧固定された状態では、各円柱体は、その直径と同一或いはそれより大きい直径をそれぞれ有する上下にある２つの半円形溝で挟持されるので、各円柱体はその２つの半円形溝に密着する。これにより、各半円形溝と各円柱体との間にできる隙間がＶ溝を利用した上記従来技術よりも小さくなるので、円柱体の両端面を複数個同時に洗浄し光学膜等を成膜する場合に、円柱体の外周面に成膜材料等の物質が付着するのを抑制できる。これにより、円柱体の外周面に金属メッキ加工を施してある場合、絶縁性材料である成膜材料等の物質が円柱体の外周面に形成した金属膜に付着するのを抑制できる。したがって、円柱体外周面の金属膜に成膜材料等の物質が付着して、その外周面と金属製ホルダの内周面とを半田で固定できなくなるのを回避できる。また、円柱体の外周面と金属製ホルダの内周面とを半田で固定しない場合にも、円柱体の外周面に成膜材料が部分的に付着するのが抑制されるので、その外径の変化が少なくなり好ましい。
【０００９】
請求項２に係る発明は、請求項１に記載の円柱体ホルダにおいて、前記上下に重なる２つの受け具は、その一方に設けた凹部とその他方に設けた凸部とが嵌合し、この嵌合部にできる段差部により、各受け具の厚さ方向における前面側および後面側から該２つの受け具間にできる隙間を通って内部へ侵入する物質を堰き止めるように構成したことを要旨とする。
【００１０】
複数の円柱体と受け具を交互に重ねた状態で、上下に重なる２つの受け具の一方の上面とその他方の下面とが単に対向する場合には、成膜材料等の物質が、各受け具の前面側および後面側から２つの受け具間にできる隙間を通って内部に侵入し、複数の円柱体各々の外周面に付着する。これに対して、上記構成によれば、上下に重なる２つの受け具は、その一方に設けた凹部とその他方に設けた凸部とが嵌合し、この嵌合部にできる段差部により、各受け具の前面側および後面側から該２つの受け具間にできる隙間を通って内部へ侵入する物質が堰き止められる。これにより、円柱体の外周面に成膜材料等の物質が付着するのをさらに抑制できる。
【００１１】
請求項３に係る発明は、請求項２に記載の円柱体ホルダにおいて、前記上下に重なる２つの受け具の嵌合部は、該２つの受け具間にでき、前記前面および後面からそれぞれ前記円柱体の軸方向に延びる水平な隙間が、前記前面および後面からそれぞれ所定距離だけ内部へ入った位置で前記段差部に突き当たるように構成されていることを要旨とする。
【００１２】
この構成によれば、各受け具の前面および後面から上記水平な隙間を通って内部へ侵入する成膜材料等の物質は、その前面および後面から所定距離だけ内部へ入った位置で段差部により堰き止められる。このため、上記所定距離、すなわち段差部の位置を適宜変更することにより、各ロッドレンズの外周面上の、物質が付着するのを禁止する領域を容易に設定することができる。
【００１３】
請求項４に係る発明は、請求項１〜３のいずれか一項に記載の円柱体ホルダにおいて、前記上下に重なる２つの受け具の嵌合部は、前記複数の半円形溝の各々の両側にそれぞれ独立して形成されていることを要旨とする。
【００１４】
この構成によれば、上下に重なる２つの受け具の嵌合部を、複数の半円形溝の各々の両側にそれぞれ独立して形成してあるので、各嵌合部の前記段差部により、前記隙間を通って内部へ侵入する物質が堰き止められる。これにより、円柱体の外周面に成膜材料等の物質が付着するのをさらに抑制できる。
【００１５】
請求項５に係る発明は、請求項１〜４のいずれか一項に記載の円柱体ホルダにおいて、前記受け具には、前記半円形溝や円柱体の寸法誤差を変形により吸収する緩衝材を収容する１つのＵ字形溝が前記複数の半円形溝と直交する方向に形成されており、また、前記Ｕ字形溝は、前記複数の円柱体が前記付勢手段により前記複数の半円形溝に押圧固定される際に、同Ｕ字形溝に収容された前記緩衝材が前記複数の円柱体の下面に当接して弾性変形するような深さに形成されていることを要旨とする。
【００１６】
この構成によれば、複数の円柱体が付勢手段により複数の半円形溝に押圧固定される際に、同Ｕ字形溝に収容された緩衝材が前記複数の円柱体の下面に当接して弾性変形する。この弾性変形により、各半円形溝や各ロッドレンズの寸法誤差を吸収することができる。また、弾性変形した緩衝材の復元力と、付勢手段により同円柱体を押圧する力は互いに逆方向に作用し、この２つの力で複数の円柱体が押圧固定されるので、同円柱体の保持力が増し、同円柱体をより強固に保持してその脱落を防止することができる。
【００１７】
請求項６に係る発明は、請求項１〜５のいずれか一項に記載の円柱体ホルダにおいて、前記受け具の厚さを前記円柱体の長さと相関を持つように設定し、前記複数の円柱体の前記受け具の前面および後面からの突出量を所定値に設定することを要旨とする。
【００１８】
この構成によれば、受け具の厚さを適宜変更して各ロッドレンズの外周面上の、物質が付着するのを禁止する領域を容易に設定することができる。
【００１９】
【発明の実施の形態】
以下、本発明に係る円柱体ホルダの各実施形態を図面に基づいて説明する。
［第１実施形態］
第１実施形態に係る円柱体ホルダ１１を、図１〜図８に基づいて説明する。図１は円柱体ホルダの正面図、図２は図１のＡーＡ線に沿った断面図、図３は図１のＢ−Ｂ線に沿った断面図、図４は図３のＣ部分の拡大図である。図１に示す円柱体ホルダ１１は、円柱体としての屈折率分布型ロッドレンズ（以下、単に「ロッドレンズ」という。）１２の両端面を複数個同時に洗浄し、光学膜を成膜する際に使用される。
【００２０】
この円柱体ホルダ１１は、開口部１３を有する板状のホルダ本体１４と、開口部１３内に上下に（図１の上下方向に）、下から順に重ねて配置される複数の受け具１５，１６，１７とを備える。ホルダ本体１４の開口部１３は、上辺１８、下辺１９、左辺２０および右辺２１からなる矩形状をなしている。すなわち、ホルダ本体１４は、図１〜図３に示すように、上辺１８、下辺１９、左辺２０および右辺２１をそれぞれ形成する上辺部２２、下辺部２３、左辺部２４および右辺部２５を有している。左辺部２４の前後面にそれぞれねじ２６、２６で固定される保持板２７，２７間に左側の保持溝が形成されるとともに、右辺部２５の前後面にそれぞれねじ２８，２８で固定される保持板２９，２９間に右側の保持溝が形成される。これら左右の保持溝により、複数の受け具１５〜１７の両端部が上下に摺動自在に支持されるようになっている。そして、上辺部２２には、付勢手段としてのばね３０をそれぞれ内蔵し、ばね３０の先端に鋼球３２を設けたねじ３１が３つ設けられている。
【００２１】
図１および図３に示すように、複数の受け具として、一番下に配置される１つの受け具１５と、この受け具１５の上に順に重ねて配置される６つの受け具１７と、一番上に配置される１つの受け具１６とが使用される。
【００２２】
各受け具１７は、図１、図４および図５に示すように、図１の左右方向に長い直方体形状を有し、その下面および上面には、複数（本例では１２個）のロッドレンズ１２を並列に位置決めする複数（１２個）の半円形溝１７ａおよび１７ｂがそれぞれ形成されている。各半円形溝１７ａ，１７ｂは、ロッドレンズ１２同士が接触しないように所定の間隔で形成されているとともに、各ロッドレンズ１２の両端面が前後方向（図１の紙面に垂直な方向）を向くように、正面視で半円形になっている。また、各半円形溝１７ａ，１７ｂは、ロッドレンズ１２の直径と同一或いはそれより大きい直径の真円を半分に切った大きさの半円形である。さらに、各半円形溝１７ａ，１７ｂは、各受け具１７の厚さ方向（図３，図４の左右方向）にそれぞれ貫通している。ただし、各半円形溝１７ｂは、中間部の溝底が後述するＵ字形溝３４と連通しているため、不連続な溝になっている（図５参照）。なお、図５に示す各受け具１７は、図１の左側から数えて３つ目の半円形溝１７ａ，１７ｂと４つ目の半円形溝との間で破断して示されている。
【００２３】
また、各受け具１７には、各半円形溝１７ａ，１７ｂや各ロッドレンズ１２の寸法誤差を変形により吸収する緩衝材としての金属パイプ３３を収容するＵ字形溝３４が形成されている。このＵ字形溝３４は、各受け具１７の上記厚さ方向の中央部を同受け具の長手方向（図１の左右方向）に貫通している。そして、Ｕ字形溝３４は、同溝に配置した金属パイプ３３の外周面が各半円形溝１７ｂの溝底よりわずかに（図７に示す寸法ｄだけ）上方に突出するような深さに形成されている。つまり、Ｕ字形溝３４は、各ロッドレンズ１２が上記ねじ３１のばね３０により各半円形溝１７ｂに押圧固定される際に、Ｕ字形溝３４に配置した金属パイプ３３が各ロッドレンズ１２の下面に当接して弾性変形するような深さに形成されている。
【００２４】
そして、複数のロッドレンズ１２は、図４〜図６に示すように、上下に重なる２つの受け具１７，１７間で、複数の半円形溝１７ｂと複数の半円形溝１７ａとで挟持されるとともに、Ｕ字形溝３４に配置した金属パイプ３３に当接して同パイプを弾性変形させるようになっている。
【００２５】
上記受け具１５は、図１および図４に示すように、下面が平坦面になっている点を除き、上記受け具１７と同じ形状を有している。すなわち、この受け具１５には、受け具１７と同様に複数の半円形溝１７ｂとＵ字形溝３４とが形成されている。
【００２６】
上記受け具１６は、図１に示すように、上面が平坦面になっている点とＵ字形溝３４が無い点とを除き、上記受け具１７と同じ形状を有している。すなわち、この受け具１６には、受け具１７と同様に複数の半円形溝１７ａが形成されている。
【００２７】
さらに、上下に重なる２つの受け具、すなわち受け具１５，１７、１７，１７、および１７，１６は、図３〜図５に示すように、その一方の上面側に設けた凹部４０とその他方の下面側に設けた凸部４１とが嵌合するようになっている。その嵌合部にできる段差部４２，４３により、各受け具１５〜１７の厚さ方向における前面１７ｃ側および後面１７ｄ側から上下に重なる２つの受け具間にできる隙間を通って内部へ侵入する物質を堰き止めるように構成されている。
【００２８】
すなわち、各受け具１７には、図４および図５に示すように、その上面側に凹部４０が各半円形溝１７ｂの両側にそれぞれ独立して形成されているとともに、その下面側に凹部４０と嵌合する凸部４１が各半円形溝１７ａの両側にそれぞれ独立して形成されている。また、２つの受け具１７，１７の嵌合部は、該両受け具間にでき、前面１７ｃ，後面１７ｄからそれぞれロッドレンズ１２の軸方向に延びる水平な隙間５０，５１（図４，図８参照）が、前面１７ｃ，後面１７ｄからそれぞれ所定距離だけ内部へ入った位置で段差部４２，４３に突き当たるようになっている。すなわち、水平な隙間５０，５１はそれぞれ、図８に示すように、前面１７ｃ、後面１７ｄからそれぞれ所定距離ａ２，ａ４だけ内部へ入った位置で段差部４２，４３に突き当たる。
【００２９】
また、受け具１５の上面側には、図４に示すように、受け具１７の凸部４１に嵌合する凹部４０が、受け具１７の凹部４０と同様に各半円形溝１７ｂの両側にそれぞれ形成されている。そして、受け具１６の下面側には、図３に示すように、受け具１７の凹部４０に嵌合する凸部４１が、受け具の凸部４１と同様に各半円形溝１７ａの両側にそれぞれ形成されている。
【００３０】
そして、上記３つのねじ３１は、ホルダ本体１４の上辺部２２に、ほぼ等間隔に設けた３つのねじ孔にそれぞれ螺合している。各ねじ３１の先端に設けた鋼球３２を受け具１６の上面にそれぞれ当接させた状態で、各ねじ３１を上辺部２２に対してねじ込むと、内部のねじ３０がそれぞれ圧縮されて受け具１６を下方に押圧する付勢力が増すようになっている。
【００３１】
次に、上記構成を有する円柱体ホルダ１１の組立手順について図１を用いて簡単に説明する（詳細は図３〜図５を参照）。
まず、受け具１５を不図示の治具を使ってその上面が上を向くように支持しながら、受け具１５のＵ字形溝３４に金属パイプ３３を配置する。次に、受け具１５の上に受け具１７を重ねる。このとき、受け具１５の凹部４０に受け具１７の凸部４１を嵌合させる。次に、その受け具１７の上に残りの受け具１７を順に重ねていく。このときも、下側の受け具１７の凹部４０に上側の受け具１７の凸部４１を嵌合させ、上側の受け具１７のＵ字形溝３４に金属パイプ３３を配置する。こうして６つの受け具１７のうちの一番上に位置する受け具１７までの積み重ね作業が完了したところで、この受け具１７の上に上記と同様に受け具１６を重ねる。
【００３２】
このように重ねた複数の受け具１５〜１７を、不図示の治具等を使って保持しながらホルダ本体１４の開口部１３に配置し、同本体の左辺部２４の前後面に保持板２７，２７をねじ２６、２６で固定するとともに、その右辺部２５の前後面に保持板２９，２９をねじ２８，２８で固定する。これにより、保持板２７，２７間に形成される左側の保持溝と、保持板２９，２９間に形成される右側の保持溝とにより、複数の受け具１５〜１７の両端部が上下に摺動自在に支持される。
【００３３】
このように複数の受け具１５〜１７が上下に摺動自在に支持された状態で、まず受け具１５の複数の半円形溝１７ｂに複数のロッドレンズ１２をそれぞれ載置する。このとき複数の受け具１６，１７は摺動可能であるので、６つの受け具１７と一番上の受け具１６とを受け具１５より上方に移動させておけば、受け具１５の複数の半円形溝１７ｂに複数のロッドレンズ１２を容易に載置することができる。
【００３４】
次に、上方に移動させた複数の受け具１６，１７のうち、受け具１５の複数の半円形溝１７ｂに載置したロッドレンズ１２の直上の受け具１７を下方に摺動させる。このとき受け具１５の凹部４０に受け具１７の凸部４１を嵌合させるとともに、複数のロッドレンズ１２に受け具１７の複数の半円形溝１７ａをそれぞれ嵌合させる。こうして、一番下に一列に並ぶ複数のロッドレンズ１２が、上下に重なる２つの受け具１５，１７間で、下方にある受け具１５の複数の半円形溝１７ｂと、上方にある受け具１７の複数の半円形溝１７ａとで挟持される。
【００３５】
以上説明した２つの受け具１５，１７と同様に、ロッドレンズ１２の載置とその直上の受け具の下方への摺動、受け具同士の嵌合、受け具とロッドレンズの嵌合を繰り返す。これによって、上下に重なる２つの受け具１７，１７或いは１７，１６間で、複数の半円形溝１７ｂと複数の半円形溝１７ａとでロッドレンズをそれぞれ挟持することができる。
【００３６】
この後、３つのねじ３１を上辺部２２に対してねじ込んでいく。これにより、各ばね３０の先端に設けた鋼球３２で受け具１６の上面を下方に押圧する付勢力が増大していく。この押圧力が受け具１６、６つの受け具１７および受け具１５にそれぞれ伝わる。このとき、受け具１５および１７の各Ｕ字形溝３４にそれぞれ配置した金属パイプ３３は、上述したように複数のロッドレンズ１２により押されて弾性変形する。このように各金属パイプ３３が弾性変形することで、各半円形溝１７ａ，１７ｂや各ロッドレンズ１２の寸法誤差が吸収される。このようにして各受け具間に保持された複数のロッドレンズ１２が押圧固定され、円柱体ホルダ１１の組立が完了する。
【００３７】
以上のように構成された第１実施形態によれば、以下の作用効果を奏する。
・各受け具１５〜１７には、ロッドレンズ１２の直径と同一或いはそれより大きい直径を有する複数の半円形溝１７ａ，１７ｂが形成されている。また、１列に並んだ複数（１２個）のロッドレンズ１２が、上下に重なる２つの受け具１５，１７、１７，１７、および１７，１６間で、下方にある受け具の複数の半円形溝１７ｂと、上方にある受け具の複数の半円形溝１７ａとでそれぞれ挟持される。これにより、１列に１２個ずつ、７段に配置された全部で８４個のロッドレンズ１２が保持される。
【００３８】
こうして、複数（１２個）のロッドレンズ１２が、上下に重なる２つの受け具の各半円形溝１７ａ，１７ｂ間に挟持されるように、複数のロッドレンズ１２と受け具１５〜１７を交互に重ねた状態で、複数のロッドレンズ１２がねじ３１のばね３０により押圧固定される。こうして複数のロッドレンズ１２が固定された状態では、各ロッドレンズ１２は、その直径と同一或いはそれより大きい直径をそれぞれ有する上下にある２つの半円形溝１７ａ，１７ｂで挟持され、各ロッドレンズ１２は２つの半円形溝１７ａ，１７ｂに密着する。これにより、各ロッドレンズ１２と各半円形溝１７ａ，１７ｂとの間にできる隙間がＶ溝を利用した上記従来技術よりも小さくなるので、各ロッドレンズ１２の両端面を複数個同時に洗浄し光学膜等を成膜する場合に、各ロッドレンズ１２の外周面に成膜材料等の物質が付着するのを抑制できる。
【００３９】
これにより、各ロッドレンズ１２の外周面に金属メッキ加工を施してある場合、絶縁性材料である成膜材料等の物質が各ロッドレンズ１２の外周面に形成した金属膜に付着するのを抑制できる。したがって、各ロッドレンズ１２の外周面の金属膜に成膜材料等の物質が付着して、その外周面と金属製ホルダの内周面とを半田で固定できなくなるのを回避できる。また、各ロッドレンズ１２の外周面と金属製ホルダの内周面とを半田で固定しない場合にも、各ロッドレンズ１２の外周面に成膜材料が部分的に付着するのが抑制されるので、その外径の変化が少なくなり好ましい。
【００４０】
・上下に重なる２つの受け具１５，１７、１７，１７および１７，１６は、凹部４０と凸部４１とがそれぞれ嵌合する。この嵌合部にできる段差部４２，４３により、各受け具の前面１７ｃ側および後面１７ｄ側から２つの受け具間にできる隙間５０，５１を通って内部へ侵入する物質が堰き止めるられる。これにより、上記成膜材料等の物質が、各受け具の前面および後面側から上下に重なる２つの受け具間にできる隙間５０，５１を通って内部へ侵入し、各ロッドレンズ１２の外周面に付着するのをさらに抑制できる。
【００４１】
・上記嵌合部は、２つの受け具間にでき、前面１７ｃおよび後面１７ｄからそれぞれ各ロッドレンズ１２の軸方向に延びる水平な隙間５０，５１が、その前面および後面からそれぞれ所定距離（図８に示す距離ａ２，ａ４）だけ内部へ入った位置で段差部４２，４３に突き当たるように構成されている。このような構成により、各受け具１５〜１７の前面１７ｃおよび後面１７ｄから隙間５０，５１を通って内部へ侵入する成膜材料等の物質は、その前面および後面から所定距離だけ内部へ入った位置で段差部４２，４３により堰き止められる。このため、上記所定距離（ａ２，ａ４）、すなわち段差部４２，４３の位置を適宜変更することにより、各ロッドレンズ１２の外周面上の、物質が付着するのを禁止する領域（図８に示す領域ａ３）を容易に設定することができる。
【００４２】
・上記嵌合部を構成する凹部４０と凸部４１は、複数の半円形溝１７ａ，１７ｂの各々の両側にそれぞれ独立して形成されている（図５，図６参照）。これにより、各嵌合部の段差部４２，４３により、隙間５０，５１（図４参照）を通って内部へ侵入する物質が堰き止められる。これにより、複数のロッドレンズ１２の外周面に成膜材料等の物質が付着するのをさらに抑制できる。
【００４３】
・７段に配列された各列の複数（１２個）のロッドレンズ１２が３つのねじ３１の各ばね３０により複数の半円形溝１７ａ，１７ｂに押圧固定される際に、受け具１５，１７の各Ｕ字形溝３４にそれぞれ収容された金属パイプ３３が複数のロッドレンズ１２の下面にそれぞれ当接して弾性変形する。すなわち、各Ｕ字形溝３４は、各受け具１５，１７の厚さ方向の中央部を同受け具の長手方向に貫通している。そして、各Ｕ字形溝３４は、同溝に配置した金属パイプ３３の外周面が各半円形溝１７ｂの溝底よりわずかに（図７の寸法ｄだけ）上方に突出するような深さに形成されている。これにより、複数のロッドレンズ１２がばね３０により各半円形溝１７ｂに押圧固定される際に、各Ｕ字形溝３４に配置した金属パイプ３３が各ロッドレンズ１２の下面に当接して弾性変形するようようになっている。この弾性変形により、各半円形溝１７ａ，１７ｂや各ロッドレンズ１２の寸法誤差を吸収することができる。また、弾性変形した金属パイプ３３の復元力と、ばね３０により各ロッドレンズ１２を押圧する力は互いに逆方向に作用し、この２つの力で複数のロッドレンズ１２が押圧固定される。このため、ロッドレンズ１２の保持力が増し、複数のロッドレンズ１２をより強固に保持してその脱落を防止することができる。
【００４４】
・各受け具１５〜１７の厚さ（図８に示す寸法ａ２，ａ３およびａ４の和）を各ロッドレンズ１２の長さと相関を持つように設定し、各ロッドレンズ１２の各受け具の前面１７ｃおよび後面１７ｄからの突出量（図８の寸法ａ１，ａ５）を所定値に設定する。これにより、各受け具の上記厚さを適宜変更して各ロッドレンズ１２の外周面上の、物質が付着するのを禁止する領域（領域ａ３）を容易に設定することができる。
【００４５】
［第２実施形態］
次に、第２実施形態に係る円柱体ホルダ１１を、図９に基づいて説明する。
上記第１実施形態では、上下に重なる２つの受け具１５，１７、１７，１７および１７，１６のうち、下方に位置する各受け具に凹部４０を、上方に位置する各受け具に凸部４１をそれぞれ設けてある。これに対して、第２実施形態では、上下に重なる２つの受け具１５，１７、１７，１７および１７，１６のうち、下方に位置する各受け具に凸部４１´を、上方に位置する各受け具に凹部４０´をそれぞれ設けてある。その他の構成は、上記第１実施形態と同じである。第２実施形態に係る円柱体ホルダ１１によっても、上記第１実施形態と同様の上記作用効果を奏することができる。
【００４６】
［ 変形例］
なお、この発明は以下のように変更して具体化することもできる。
・上記第１実施形態では、一番下に位置する受け具１５と一番上に位置する受け具１６との間に、６つの受け具１７を配置してあるが、受け具１７の数を「６」以外の整数にした構成にも本発明は適用可能である。
【００４７】
・上記第１実施形態では、各受け具に設ける半円形溝１７ａ，１７ｂの数を「１２」以外の整数にした構成にも本発明は適用可能である。
・上記第１実施形態では、１つの受け具が有する半円形溝の数は同数（１２）、つまり、上下２つの受け具間にそれぞれ同数（１２個）のロッドレンズが保持されるようにしているが、本発明はこのような構成に限定されない。
【００４８】
・上記第１実施形態では、３種類の受け具１５，１６および１７を用いているが、受け具１５，１６は用いずに、上面と下面の両方に複数の半円形溝が形成された受け具１７のみを用いる構成にも本発明は適用可能である。また、受け具１５と１６のいずれか一方と受け具１７とを用いる構成にも本発明は適用可能である。
【００４９】
・上記第１実施形態では、ホルダ本体１４の下辺部２３の下辺１９は平坦面であるが、この下辺１９に複数の半円形溝１７ｂを設けた構成にも本発明は適用可能である。
【００５０】
・上記第１実施形態では、緩衝材として金属パイプ３３を用いているが、緩衝材は弾性変形可能な円筒体或いは円柱体であれば良く、金属パイプ３３に限らない。
【００５１】
【発明の効果】
以上説明したように、請求項１に係る発明によれば、複数の円柱体と受け具を交互に重ね、複数の円柱体が付勢手段により押圧固定された状態では、各円柱体は、その直径と同一或いはそれより大きい直径をそれぞれ有する上下にある２つの半円形溝で挟持され、各円柱体はその２つの半円形溝に密着する。これにより、各半円形溝と各円柱体との間にできる隙間がＶ溝を利用した上記従来技術よりも小さくなるので、円柱体の両端面を複数個同時に洗浄し光学膜等を成膜する場合に、各円柱体の外周面に成膜材料等の物質が付着するのを抑制できる。これにより、各円柱体の外周面に金属メッキ加工を施してある場合、絶縁性材料である成膜材料等の物質が各円柱体の外周面に形成した金属膜に付着するのを抑制できる。したがって、円柱体外周面の金属膜に成膜材料等の物質が付着して、その外周面と金属製ホルダの内周面とを半田で固定できなくなるのを回避できる。また、円柱体の外周面と金属製ホルダの内周面とを半田で固定しない場合にも、円柱体の外周面に成膜材料が部分的に付着するのが抑制されるので、その外径の変化が少なくなり好ましい。
【００５２】
また、請求項２に係る発明によれば、上下に重なる２つの受け具は、その一方に設けた凹部とその他方に設けた凸部とが嵌合し、この嵌合部にできる段差部により、各受け具の前面側および後面側から該２つの受け具間にできる隙間を通って内部へ侵入する物質が堰き止められる。これにより、円柱体の外周面に成膜材料等の物質が付着するのをさらに抑制できる。
【図面の簡単な説明】
【図１】第１実施形態に係る円柱体ホルダを示す平面図。
【図２】図１のＡ−Ａ線に沿った断面図。
【図３】図１のＢ−Ｂ線に沿った断面図。
【図４】図３のＣ部を示す拡大図。
【図５】上下に重なる受け具を示す分解斜視図。
【図６】ロッドレンズが押圧固定された状態を示す説明図。
【図７】受け具のＵ字形溝に金属パイプを配置した状態を示す断面図。
【図８】ロッドレンズの外周面に成膜材料が付着する様子を示す説明図。
【図９】第２実施形態に係る円柱体ホルダを示す図４と同様の拡大図。
【符号の説明】
ａ２，ａ４…所定距離、１１…円柱体ホルダ、１２…円柱体としてのロッドレンズ、１５，１６，１７…受け具、１７ａ，１７ｂ…半円形溝、１７ｃ…前面、１７ｄ…後面、３０…付勢手段としてのばね、３３…緩衝材としての金属パイプ、３４…Ｕ字形溝、４０…凹部、４１…凸部、４２，４３…段差部、５０，５１…隙間。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a cylindrical holder used for simultaneously processing a plurality of both end surfaces of a cylindrical body such as a gradient index rod lens.
[0002]
[Prior art]
An example of such a cylindrical holder is disclosed in Japanese Patent Publication No. 14590/1991. This cylindrical holder is provided with a receiving member provided with a plurality of V-grooves on the upper surface for supporting a cylindrical body (gradient-index rod lens), a buffer material (metal pipe) in contact with the cylindrical body, and these arranged alternately. And an elastic member for elastically fixing in the laminating direction.
[0003]
Such a cylindrical holder is used, for example, in order to add a value to a gradient index rod lens as a cylindrical body, simultaneously cleaning a plurality of both end surfaces of the rod lens, and forming an optical film. You. Many of the film forming materials used for this optical film are SiO 2 2 , TiO 2 , Ta 2 O 5 , Al 2 O 3 And other insulating materials.
[0004]
[Problems to be solved by the invention]
By the way, the above-mentioned prior art has the following problems.
(1) Since the plurality of rod lenses are sandwiched between the plurality of V-grooves of the receiver positioned below and the cushioning material (metal pipe) positioned above, a gap is formed on both sides of each rod lens. Then, the film-forming material penetrates from the gap and adheres to the outer peripheral surface of each rod lens. For this reason, when metal plating is performed on the outer peripheral surface of the rod lens, the portion where the film-forming material, which is an insulating material, adheres to the metal film formed on the outer peripheral surface of each rod lens, is in contact with the outer peripheral surface of the rod lens. The inner peripheral surface of the metal holder cannot be fixed with solder.
[0005]
(2) Even when the outer peripheral surface of the rod lens and the inner peripheral surface of the metal holder are not fixed by solder, it is not preferable that the film-forming material partially adheres to the outer peripheral surface of the rod lens.
[0006]
The present invention has been made in view of such a conventional problem, and in the case of simultaneously cleaning a plurality of both end surfaces of a cylindrical body and forming an optical film or the like, a film forming material is formed on the outer peripheral surface of the cylindrical body. It is an object of the present invention to provide a cylindrical holder capable of suppressing the attachment of a substance such as
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the invention according to claim 1 includes a plurality of receiving members having a plurality of concave grooves for positioning a plurality of cylindrical bodies in parallel, and mounting the plurality of cylindrical bodies on the plurality of concave grooves. A plurality of cylindrical bodies and the receiving member are alternately overlapped with each other, and a biasing means for pressing and fixing the plurality of cylindrical members is provided. A plurality of semicircular grooves having a diameter equal to or larger than the diameter of the cylindrical body are formed, and the plurality of cylindrical bodies are located between the two receiving members that are vertically overlapped with each other. The gist is configured to be sandwiched between a plurality of semi-circular grooves of the receiving tool and a plurality of semi-circular grooves of the receiving tool located above.
[0008]
According to this configuration, the plurality of cylindrical bodies are sandwiched by the plurality of semicircular grooves of the lower receiving tool and the plurality of semicircular grooves of the upper receiving tool between the two vertically overlapping receiving tools. You. In this manner, the plurality of cylinders and the receiving members are alternately overlapped with each other so that each of the plurality of cylinders is sandwiched between the respective semicircular grooves of the two receiving members that are vertically stacked. Is pressed and fixed. In the state of being pressed and fixed in this manner, each cylindrical body is sandwiched between two upper and lower semi-circular grooves having the same or larger diameters, respectively. Adhere to the groove. As a result, the gap formed between each semicircular groove and each cylindrical body is smaller than that in the above-described conventional technique using the V-groove, so that a plurality of both end surfaces of the cylindrical body are simultaneously cleaned to form an optical film or the like. In this case, it is possible to suppress a substance such as a film forming material from adhering to the outer peripheral surface of the cylindrical body. Accordingly, when the outer peripheral surface of the cylindrical body is subjected to the metal plating process, it is possible to suppress a substance such as a film forming material, which is an insulating material, from adhering to the metal film formed on the outer peripheral surface of the cylindrical body. Therefore, it is possible to prevent a substance such as a film-forming material from adhering to the metal film on the outer peripheral surface of the cylindrical body, so that the outer peripheral surface and the inner peripheral surface of the metal holder cannot be fixed with solder. Further, even when the outer peripheral surface of the cylindrical body and the inner peripheral surface of the metal holder are not fixed with solder, since the film-forming material is suppressed from being partially attached to the outer peripheral surface of the cylindrical body, the outer diameter of the cylindrical body is suppressed. Change is small, which is preferable.
[0009]
According to a second aspect of the present invention, in the columnar holder according to the first aspect, the two vertically overlapping receptacles are fitted with a concave portion provided on one side and a convex portion provided on the other side. A step formed in the fitting portion is configured to block substances that intrude into the inside from the front side and the rear side in the thickness direction of each receiver through a gap formed between the two receivers. And
[0010]
When a plurality of cylindrical bodies and receiving members are alternately stacked, and one upper surface of the two receiving members that are vertically stacked and the other lower surface simply oppose each other, a substance such as a film forming material is supplied to each receiving member. It penetrates into the inside from the front side and the rear side of the tool through the gap formed between the two receiving tools, and adheres to the outer peripheral surface of each of the plurality of cylindrical bodies. On the other hand, according to the above-described configuration, the two receiving members that are vertically overlapped are configured such that the concave portion provided on one side thereof and the convex portion provided on the other side are fitted, and the step portion formed in the fitted portion allows Substances that enter the interior from the front and rear sides of each receptacle through the gaps formed between the two receptacles are blocked. Thereby, it is possible to further suppress the substance such as the film forming material from adhering to the outer peripheral surface of the cylindrical body.
[0011]
According to a third aspect of the present invention, in the cylindrical body holder according to the second aspect, the fitting portion of the two vertically overlapping receiving members is formed between the two receiving members, and the column is formed from the front surface and the rear surface. The gist is that a horizontal gap extending in the axial direction of the body is configured to abut on the step portion at a position inside the front surface and the rear surface by a predetermined distance, respectively.
[0012]
According to this configuration, a substance such as a film-forming material that enters the inside through the horizontal gap from the front and rear surfaces of each of the receivers is positioned at a predetermined distance from the front and rear surfaces by the step portion. Can be blocked. For this reason, by appropriately changing the predetermined distance, that is, the position of the step portion, it is possible to easily set an area on the outer peripheral surface of each rod lens where the substance is prevented from adhering.
[0013]
According to a fourth aspect of the present invention, in the columnar holder according to any one of the first to third aspects, the fitting portions of the two vertically overlapping receiving members are formed on both sides of each of the plurality of semicircular grooves. The gist is that they are formed independently of each other.
[0014]
According to this configuration, the fitting portions of the two vertically overlapping receiving members are formed independently on both sides of each of the plurality of semicircular grooves. Substances that enter the interior through the gap are blocked. Thereby, it is possible to further suppress the substance such as the film forming material from adhering to the outer peripheral surface of the cylindrical body.
[0015]
According to a fifth aspect of the present invention, in the cylindrical holder according to any one of the first to fourth aspects, the receiving member is provided with a cushioning material that absorbs a dimensional error of the semicircular groove or the cylindrical body by deformation. One U-shaped groove to be accommodated is formed in a direction orthogonal to the plurality of semi-circular grooves, and the U-shaped groove is formed such that the plurality of cylindrical bodies are formed in the plurality of semi-circular grooves by the urging means. The gist is that the cushioning material accommodated in the U-shaped groove is formed in such a depth that the cushioning material is elastically deformed by contacting the lower surfaces of the plurality of columnar bodies when pressed and fixed.
[0016]
According to this configuration, when the plurality of cylinders are pressed and fixed to the plurality of semicircular grooves by the biasing means, the cushioning material accommodated in the U-shaped groove abuts on the lower surfaces of the plurality of cylinders. Elastically deform. Due to this elastic deformation, dimensional errors of each semicircular groove and each rod lens can be absorbed. Further, the restoring force of the elastically deformed cushioning material and the force of pressing the same cylinder by the urging means act in opposite directions, and a plurality of cylinders are pressed and fixed by these two forces. , The holding power of the column can be increased, and the column can be held more firmly to prevent the column from falling off.
[0017]
According to a sixth aspect of the present invention, in the cylindrical holder according to any one of the first to fifth aspects, the thickness of the receiving member is set so as to have a correlation with the length of the cylindrical body. The gist of the present invention is to set the amount of protrusion of the cylindrical body from the front and rear surfaces of the receiving member to a predetermined value.
[0018]
According to this configuration, it is possible to easily set a region on the outer peripheral surface of each rod lens where the substance is prevented from being attached by appropriately changing the thickness of the receiving member.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of a cylindrical holder according to the present invention will be described with reference to the drawings.
[First Embodiment]
The cylindrical holder 11 according to the first embodiment will be described with reference to FIGS. 1 is a front view of a cylindrical holder, FIG. 2 is a cross-sectional view taken along line AA of FIG. 1, FIG. 3 is a cross-sectional view taken along line BB of FIG. 1, and FIG. FIG. The cylindrical holder 11 shown in FIG. 1 is used for simultaneously cleaning a plurality of both end surfaces of a gradient index rod lens (hereinafter simply referred to as a “rod lens”) 12 as a cylindrical body and forming an optical film. used.
[0020]
The cylindrical holder 11 includes a plate-shaped holder body 14 having an opening 13 and a plurality of receiving members 15 arranged in the opening 13 vertically (in the vertical direction in FIG. 1) from the bottom. 16, 17 are provided. The opening 13 of the holder body 14 has a rectangular shape including an upper side 18, a lower side 19, a left side 20, and a right side 21. That is, as shown in FIGS. 1 to 3, the holder main body 14 has an upper side portion 22, a lower side portion 23, a left side portion 24, and a right side portion 25 that form an upper side 18, a lower side 19, a left side 20, and a right side 21, respectively. ing. A left holding groove is formed between holding plates 27, 27 fixed on the front and rear surfaces of the left side portion 24 with screws 26, 26, respectively, and a holding fixed on the front and rear surfaces of the right side portion 25 with screws 28, 28, respectively. A right holding groove is formed between the plates 29,29. The left and right holding grooves support both ends of the plurality of receiving members 15 to 17 so as to be slidable up and down. The upper side 22 is provided with three springs 31 each of which incorporates a spring 30 as a biasing means and has a steel ball 32 provided at the tip of the spring 30.
[0021]
As shown in FIGS. 1 and 3, as a plurality of receiving members, one receiving member 15 arranged at the bottom, and six receiving members 17 arranged sequentially on the receiving member 15, One receiver 16 located at the top is used.
[0022]
As shown in FIGS. 1, 4 and 5, each receiving member 17 has a rectangular parallelepiped shape elongated in the left-right direction of FIG. 1, and a plurality of (12 in this example) rod lenses are provided on the lower surface and the upper surface thereof. Plural (12) semicircular grooves 17a and 17b for positioning 12 in parallel are formed respectively. Each semicircular groove 17a, 17b is formed at a predetermined interval so that the rod lenses 12 do not contact each other, and both end surfaces of each rod lens 12 face the front-back direction (the direction perpendicular to the paper surface of FIG. 1). Thus, it is semicircular in front view. Each of the semicircular grooves 17a and 17b is a semicircle having a size obtained by cutting a true circle having a diameter equal to or larger than the diameter of the rod lens 12 in half. Further, each semicircular groove 17a, 17b penetrates in the thickness direction of each receiving member 17 (left and right direction in FIGS. 3 and 4). However, each semicircular groove 17b is a discontinuous groove because the groove bottom at the intermediate portion communicates with a U-shaped groove 34 described later (see FIG. 5). Note that each receiving member 17 shown in FIG. 5 is cut away between the third semicircular grooves 17a and 17b counted from the left side in FIG. 1 and the fourth semicircular groove.
[0023]
Each receiving member 17 is formed with a U-shaped groove 34 for accommodating a metal pipe 33 as a cushioning material for absorbing the dimensional error of each semicircular groove 17a, 17b and each rod lens 12 by deformation. The U-shaped groove 34 penetrates through the central portion of each receiving member 17 in the thickness direction in the longitudinal direction of the receiving member (left-right direction in FIG. 1). The U-shaped groove 34 is formed at a depth such that the outer peripheral surface of the metal pipe 33 disposed in the groove projects slightly upward (by a dimension d shown in FIG. 7) from the groove bottom of each semicircular groove 17b. Have been. That is, when each rod lens 12 is pressed and fixed in each semicircular groove 17 b by the spring 30 of the screw 31, the metal pipe 33 arranged in the U-shaped groove 34 is formed on the lower surface of each rod lens 12. Is formed at such a depth as to be elastically deformed by contact with the contact hole.
[0024]
Then, as shown in FIGS. 4 to 6, the plurality of rod lenses 12 are sandwiched between the two semicircular grooves 17b and the plural semicircular grooves 17a between the vertically overlapping two receiving members 17, 17. At the same time, it comes into contact with the metal pipe 33 disposed in the U-shaped groove 34 to elastically deform the pipe.
[0025]
As shown in FIGS. 1 and 4, the receiving member 15 has the same shape as the receiving member 17 except that the lower surface is flat. That is, a plurality of semicircular grooves 17 b and a U-shaped groove 34 are formed in the receiving member 15, similarly to the receiving member 17.
[0026]
As shown in FIG. 1, the receiving member 16 has the same shape as the receiving member 17 except that the upper surface is flat and the U-shaped groove 34 is not provided. That is, a plurality of semicircular grooves 17a are formed in the receiving member 16 as in the receiving member 17.
[0027]
Further, the two receiving members which overlap vertically, namely the receiving members 15, 17, 17, 17, and 17, 16 are provided with a concave portion 40 provided on one upper surface side and a concave portion provided on the other side, as shown in FIGS. And a convex portion 41 provided on the lower surface side thereof. Due to the step portions 42 and 43 formed in the fitting portion, the receiving members 15 to 17 enter the interior through a gap formed between two receiving members vertically overlapping from the front surface 17c side and the rear surface 17d side in the thickness direction. It is configured to block the substance.
[0028]
That is, as shown in FIG. 4 and FIG. 5, the recesses 40 are formed independently on both sides of each semicircular groove 17b on the upper surface of each receiving member 17, and the recesses 40 are formed on the lower surface thereof. Are formed independently on both sides of each semicircular groove 17a. Further, a fitting portion between the two receiving members 17, 17 is formed between the two receiving members, and horizontal gaps 50, 51 extending in the axial direction of the rod lens 12 from the front surface 17c and the rear surface 17d respectively (FIGS. 4, 8). (See FIG. 3) abuts the step portions 42 and 43 at positions where they enter the inside by a predetermined distance from the front surface 17c and the rear surface 17d, respectively. That is, as shown in FIG. 8, the horizontal gaps 50 and 51 respectively abut the step portions 42 and 43 at positions within the inside from the front surface 17c and the rear surface 17d by predetermined distances a2 and a4, respectively.
[0029]
As shown in FIG. 4, on the upper surface side of the receiving device 15, concave portions 40 to be fitted to the convex portions 41 of the receiving device 17 are provided on both sides of each semicircular groove 17 b similarly to the concave portions 40 of the receiving device 17. Each is formed. As shown in FIG. 3, on the lower surface of the receiving member 16, convex portions 41 that fit into the concave portions 40 of the receiving member 17 are provided on both sides of each semicircular groove 17 a similarly to the convex portion 41 of the receiving member. Each is formed.
[0030]
The three screws 31 are respectively screwed into three screw holes provided at substantially equal intervals in the upper side portion 22 of the holder body 14. When each screw 31 is screwed into the upper side portion 22 in a state in which the steel ball 32 provided at the tip of each screw 31 is in contact with the upper surface of the receiving member 16, the internal screw 30 is compressed and the receiving member is pressed. The urging force for pressing the lower portion 16 is increased.
[0031]
Next, a procedure for assembling the cylindrical holder 11 having the above configuration will be briefly described with reference to FIG. 1 (for details, see FIGS. 3 to 5).
First, the metal pipe 33 is arranged in the U-shaped groove 34 of the receiver 15 while supporting the receiver 15 with a jig (not shown) so that the upper surface thereof faces upward. Next, the receiver 17 is overlaid on the receiver 15. At this time, the convex portion 41 of the receiving member 17 is fitted into the concave portion 40 of the receiving member 15. Next, the remaining receivers 17 are sequentially stacked on the receiver 17. Also at this time, the convex portion 41 of the upper receiving member 17 is fitted into the concave portion 40 of the lower receiving member 17, and the metal pipe 33 is disposed in the U-shaped groove 34 of the upper receiving member 17. When the stacking operation up to the uppermost receiving member 17 of the six receiving members 17 is completed, the receiving member 16 is stacked on the receiving member 17 in the same manner as described above.
[0032]
The plurality of receiving members 15 to 17 stacked in this manner are arranged in the opening 13 of the holder main body 14 while being held by using a jig or the like (not shown), and the holding plate 27 is provided on the front and rear surfaces of the left side portion 24 of the main body. , 27 are fixed with screws 26, 26, and holding plates 29, 29 are fixed to the front and rear surfaces of the right side 25 with screws 28, 28. As a result, the left and right holding grooves formed between the holding plates 27 and 27 and the right holding grooves formed between the holding plates 29 and 29 slide both ends of the plurality of holders 15 to 17 up and down. It is movably supported.
[0033]
With the plurality of receiving members 15 to 17 slidably supported up and down in this manner, first, the plurality of rod lenses 12 are respectively placed in the plurality of semicircular grooves 17b of the receiving member 15. At this time, since the plurality of receiving members 16 and 17 are slidable, if the six receiving members 17 and the uppermost receiving member 16 are moved above the receiving member 15, the plurality of receiving members 15 can be slid. The plurality of rod lenses 12 can be easily placed in the semicircular groove 17b.
[0034]
Next, among the plurality of receiving members 16 and 17 moved upward, the receiving member 17 immediately above the rod lens 12 placed in the plurality of semicircular grooves 17b of the receiving member 15 is slid downward. At this time, the convex portion 41 of the receiving member 17 is fitted into the concave portion 40 of the receiving member 15, and the plurality of semicircular grooves 17a of the receiving member 17 are fitted into the plurality of rod lenses 12, respectively. In this manner, the plurality of rod lenses 12 arranged in a line at the bottom are formed by a plurality of semicircular grooves 17b of the lower receiving member 15 and the upper receiving member 17 between the two receiving members 15, 17 which are vertically stacked. And a plurality of semicircular grooves 17a.
[0035]
Similarly to the two receiving members 15 and 17 described above, the placement of the rod lens 12, sliding downward of the receiving member immediately above, fitting of the receiving members, and fitting of the receiving member and the rod lens are repeated. . Thus, the rod lens can be sandwiched between the plurality of semicircular grooves 17b and the plurality of semicircular grooves 17a between the two receiving members 17, 17 or 17, 16 which are vertically overlapped.
[0036]
Thereafter, the three screws 31 are screwed into the upper side portion 22. As a result, the urging force for pressing the upper surface of the receiving member 16 downward with the steel ball 32 provided at the tip of each spring 30 increases. This pressing force is transmitted to the receiving member 16, the six receiving members 17, and the receiving member 15, respectively. At this time, the metal pipes 33 respectively arranged in the U-shaped grooves 34 of the receiving members 15 and 17 are elastically deformed by being pushed by the plurality of rod lenses 12 as described above. The elastic deformation of the metal pipes 33 absorbs the dimensional errors of the semicircular grooves 17a and 17b and the rod lenses 12. In this way, the plurality of rod lenses 12 held between the receiving members are pressed and fixed, and the assembly of the cylindrical holder 11 is completed.
[0037]
According to the first embodiment configured as described above, the following operation and effect can be obtained.
A plurality of semi-circular grooves 17a and 17b having a diameter equal to or larger than the diameter of the rod lens 12 are formed in each of the receiving members 15 to 17. In addition, a plurality of (12) rod lenses 12 arranged in a line form a plurality of semicircles of the lower receiving member between two receiving members 15, 17, 17, 17, and 17, 16 which are vertically stacked. The groove 17b is sandwiched between the plurality of semicircular grooves 17a of the receiver located above. As a result, a total of 84 rod lenses 12 arranged in seven stages, 12 in a row, are held.
[0038]
In this manner, the plurality of (12) rod lenses 12 and the receiving members 15 to 17 are alternately arranged such that the plurality of (12) rod lenses 12 are sandwiched between the semicircular grooves 17a and 17b of the two receiving members that are vertically stacked. In the stacked state, the plurality of rod lenses 12 are pressed and fixed by the springs 30 of the screws 31. In a state where the plurality of rod lenses 12 are fixed in this manner, each rod lens 12 is sandwiched between two upper and lower semicircular grooves 17a and 17b having the same or larger diameters, respectively. Are in close contact with the two semicircular grooves 17a, 17b. As a result, the gap formed between each rod lens 12 and each semicircular groove 17a, 17b is smaller than that in the above-described conventional technology using the V-groove. When a film or the like is formed, it is possible to suppress a substance such as a film forming material from adhering to the outer peripheral surface of each rod lens 12.
[0039]
Accordingly, when the outer peripheral surface of each rod lens 12 is subjected to metal plating, a substance such as a film forming material which is an insulating material is prevented from adhering to the metal film formed on the outer peripheral surface of each rod lens 12. it can. Therefore, it is possible to avoid that a substance such as a film-forming material adheres to the metal film on the outer peripheral surface of each rod lens 12 and the outer peripheral surface and the inner peripheral surface of the metal holder cannot be fixed by solder. Further, even when the outer peripheral surface of each rod lens 12 and the inner peripheral surface of the metal holder are not fixed by solder, since the film-forming material is suppressed from being partially attached to the outer peripheral surface of each rod lens 12. This is preferable because the change in the outer diameter is small.
[0040]
The recesses 40 and the protrusions 41 of the two receiving members 15, 17, 17, 17 and 17, 16 which are vertically overlapped with each other are fitted. The step portions 42 and 43 formed as the fitting portions block substances that intrude into the inside from the front surface 17c side and the rear surface 17d side of each receiving member through the gaps 50 and 51 formed between the two receiving members. As a result, substances such as the film forming material enter the inside through the gaps 50 and 51 formed between the two receivers vertically stacked from the front and rear sides of each receiver, and the outer peripheral surface of each rod lens 12. Can be further suppressed.
[0041]
The above-mentioned fitting portion is formed between the two receiving members, and horizontal gaps 50 and 51 extending in the axial direction of each rod lens 12 from the front surface 17c and the rear surface 17d respectively have a predetermined distance from the front surface and the rear surface (FIG. 8). (A2, a4) shown in FIG. With such a configuration, a substance such as a film-forming material that enters the interior through the gaps 50 and 51 from the front surface 17c and the rear surface 17d of each of the receiving members 15 to 17 enters the interior by a predetermined distance from the front surface and the rear surface. It is blocked by the steps 42 and 43 at the position. Therefore, by appropriately changing the predetermined distances (a2, a4), that is, the positions of the steps 42, 43, the area on the outer peripheral surface of each rod lens 12 where the substance is prevented from adhering (see FIG. 8). The area a3) shown can be easily set.
[0042]
-The concave part 40 and the convex part 41 which comprise the said fitting part are each independently formed in both sides of each of several semicircle groove 17a, 17b (refer FIG. 5, FIG. 6). As a result, the substances that enter the inside through the gaps 50 and 51 (see FIG. 4) are blocked by the steps 42 and 43 of each fitting part. Thereby, it is possible to further suppress the substance such as the film forming material from adhering to the outer peripheral surfaces of the plurality of rod lenses 12.
[0043]
When the plurality of (12) rod lenses 12 in each row arranged in seven stages are pressed and fixed to the plurality of semicircular grooves 17a, 17b by the springs 30 of the three screws 31, the receiving members 15, 17 The metal pipes 33 respectively housed in the U-shaped grooves 34 abut on the lower surfaces of the plurality of rod lenses 12 and are elastically deformed. That is, each U-shaped groove 34 penetrates through the central part in the thickness direction of each of the receivers 15 and 17 in the longitudinal direction of the receiver. Each U-shaped groove 34 is formed to a depth such that the outer peripheral surface of the metal pipe 33 disposed in the groove projects slightly upward (by the dimension d in FIG. 7) from the groove bottom of each semicircular groove 17b. Have been. Thereby, when the plurality of rod lenses 12 are pressed and fixed in the respective semicircular grooves 17b by the springs 30, the metal pipes 33 arranged in the respective U-shaped grooves 34 are brought into contact with the lower surfaces of the respective rod lenses 12 to be elastically deformed. It is as follows. Due to this elastic deformation, dimensional errors of the semicircular grooves 17a and 17b and the rod lenses 12 can be absorbed. The restoring force of the elastically deformed metal pipe 33 and the force of pressing each rod lens 12 by the spring 30 act in opposite directions, and the two forces press and fix the plurality of rod lenses 12. For this reason, the holding force of the rod lens 12 is increased, and the plurality of rod lenses 12 can be held more firmly and can be prevented from falling off.
[0044]
The thickness (sum of the dimensions a2, a3, and a4 shown in FIG. 8) of each of the receiving members 15 to 17 is set so as to have a correlation with the length of each rod lens 12, and the front surface of each receiving member of each rod lens 12 is set. The protrusion amounts from the rear surface 17c and the rear surface 17d (dimensions a1 and a5 in FIG. 8) are set to predetermined values. This makes it possible to easily set the area (area a3) on the outer peripheral surface of each rod lens 12 where the substance is prevented from adhering by appropriately changing the thickness of each receiver.
[0045]
[Second embodiment]
Next, a cylindrical holder 11 according to a second embodiment will be described with reference to FIG.
In the first embodiment, of the two receiving parts 15, 17, 17, 17, and 17, 16 which are vertically overlapped, the concave part 40 is provided in each of the receiving parts located below, and the convex part is provided in each of the receiving parts located above. 41 are provided respectively. On the other hand, in the second embodiment, of the two receiving members 15, 17, 17, 17 and 17, 16, which are vertically overlapped, the convex portion 41 ′ is located on the receiving member located at the lower side. A concave portion 40 'is provided in each receiving member. Other configurations are the same as those of the first embodiment. With the cylindrical body holder 11 according to the second embodiment, the same operational effects as in the first embodiment can be achieved.
[0046]
[Modifications]
The present invention can be embodied with the following modifications.
In the first embodiment, the six receiving members 17 are arranged between the receiving member 15 located at the bottom and the receiving member 16 located at the top, but the number of receiving members 17 is The present invention is also applicable to configurations with integers other than “6”.
[0047]
In the first embodiment, the present invention is also applicable to a configuration in which the number of semicircular grooves 17a and 17b provided in each receiver is an integer other than "12".
In the first embodiment, the number of semi-circular grooves in one receiver is the same (12), that is, the same number (12) of rod lenses are respectively held between the upper and lower receivers. However, the present invention is not limited to such a configuration.
[0048]
In the first embodiment, the three types of receiving members 15, 16 and 17 are used. However, the receiving members 15 and 16 are not used, and a plurality of semicircular grooves are formed on both the upper surface and the lower surface. The present invention is applicable to a configuration using only the tool 17. The present invention is also applicable to a configuration using one of the receiving members 15 and 16 and the receiving member 17.
[0049]
In the first embodiment, the lower side 19 of the lower side 23 of the holder body 14 is a flat surface, but the present invention is also applicable to a configuration in which the lower side 19 is provided with a plurality of semicircular grooves 17b.
[0050]
In the first embodiment, the metal pipe 33 is used as the cushioning material. However, the cushioning material may be an elastically deformable cylinder or column, and is not limited to the metal pipe 33.
[0051]
【The invention's effect】
As described above, according to the invention of claim 1, in a state where the plurality of cylinders and the receiving member are alternately stacked and the plurality of cylinders are pressed and fixed by the urging means, each of the cylinders is It is sandwiched between two upper and lower semi-circular grooves each having a diameter equal to or larger than the diameter, and each cylindrical body closely contacts the two semi-circular grooves. As a result, the gap formed between each semicircular groove and each cylindrical body is smaller than that in the above-described conventional technology using the V-groove. In this case, a substance such as a film-forming material can be prevented from adhering to the outer peripheral surface of each cylindrical body. Accordingly, when the outer peripheral surface of each of the cylinders is subjected to metal plating, it is possible to prevent substances such as a film-forming material, which is an insulating material, from adhering to the metal film formed on the outer peripheral surface of each of the cylinders. Therefore, it is possible to prevent a substance such as a film-forming material from adhering to the metal film on the outer peripheral surface of the cylindrical body, so that the outer peripheral surface and the inner peripheral surface of the metal holder cannot be fixed with solder. Further, even when the outer peripheral surface of the cylindrical body and the inner peripheral surface of the metal holder are not fixed with solder, since the film-forming material is suppressed from being partially attached to the outer peripheral surface of the cylindrical body, the outer diameter of the cylindrical body is suppressed. Change is small, which is preferable.
[0052]
According to the second aspect of the present invention, the two receiving members which are vertically overlapped with each other have the concave portion provided on one side thereof and the convex portion provided on the other side fitted thereto, and the step portion formed in the fitting portion is used. Substances that enter the inside from the front side and the rear side of each of the receiving members through gaps formed between the two receiving members are blocked. Thereby, it is possible to further suppress the substance such as the film forming material from adhering to the outer peripheral surface of the cylindrical body.
[Brief description of the drawings]
FIG. 1 is a plan view showing a cylindrical holder according to a first embodiment.
FIG. 2 is a sectional view taken along the line AA of FIG. 1;
FIG. 3 is a sectional view taken along the line BB of FIG. 1;
FIG. 4 is an enlarged view showing a portion C in FIG. 3;
FIG. 5 is an exploded perspective view showing receivers that are vertically overlapped.
FIG. 6 is an explanatory diagram showing a state where the rod lens is pressed and fixed.
FIG. 7 is a cross-sectional view showing a state where a metal pipe is arranged in a U-shaped groove of the receiving device.
FIG. 8 is an explanatory view showing a state in which a film-forming material adheres to an outer peripheral surface of a rod lens.
FIG. 9 is an enlarged view similar to FIG. 4, showing a cylindrical holder according to a second embodiment.
[Explanation of symbols]
a2, a4: predetermined distance, 11: cylindrical holder, 12: rod lens as a cylindrical body, 15, 16, 17 ... receiver, 17a, 17b: semicircular groove, 17c: front, 17d: rear, 30 ... attached A spring as a biasing means, 33 a metal pipe as a cushioning material, 34 a U-shaped groove, 40 a concave portion, 41 a convex portion, 42, 43 a step portion, 50, 51 a gap.
