JP3983058B2

JP3983058B2 - Sphere homogeneity judgment device

Info

Publication number: JP3983058B2
Application number: JP2002029641A
Authority: JP
Inventors: 裕二河守
Original assignee: Yokohama Rubber Co Ltd
Current assignee: Yokohama Rubber Co Ltd
Priority date: 2002-02-06
Filing date: 2002-02-06
Publication date: 2007-09-26
Anticipated expiration: 2022-02-06
Also published as: JP2003232751A

Description

【０００１】
【発明の属する技術分野】
本発明は、ゴルフボールのような球体の均質性判定装置に関し、更に詳しくは、少なくとも３層の球形層体を同心状に積層してなる球体において、各球形層体間の球心のずれ量を用いて均質性を判定するようにした球体の均質性判定装置に関する。
【０００２】
【従来の技術】
一般に、ゴルフボールは、球状の芯体の外側に球形の外皮層を積層した２層構造になっている。このような球形層体を同心状に積層してなるゴルフボールでは、球形層体間（この場合は芯体と外皮層との間）の球心のずれ量を用いて均質性を判断するようにしている。Ｘ線により一方向から透視した透過画像と９０°離間した方向から透視した透過画像とをカメラによりそれぞれ取り込み、それらの画像データから球形層体の球心をそれぞれ算出し、その球心のずれ量が予め設定した基準値内であれば、均質性が良好であると判定するのである。
【０００３】
ところで、近年、飛距離、スピン性能、軟らかさ等を高次元でバランス化するため、３層以上の球形層体を同心状に積層してなる多層構造のゴルフボールが用いられるようになってきた。このような多層構造のゴルフボールでは、その均質性を判断する場合、各球形層体間の球心のずれ量を加味して判断する必要があるが、従来提案されている技術では、それに対応することができないという問題があった。
【０００４】
【発明が解決しようとする課題】
本発明の目的は、少なくとも３層の球形層体を同心状に積層してなる球体において、各球形層体間の球心のずれ量を加味して均質性を判定することが可能な球体の均質性判定装置を提供することにある。
【０００６】
上記目的を達成する本発明の球体の均質性判定装置は、少なくとも３層の球形層体を同心状に積層してなる球体の均質性を判定する装置であって、前記球体を撮影位置下方まで搬送する球体搬送手段と、該撮影位置下方まで搬送された球体を保持して撮影位置まで上昇可能で、かつ該球体を９０°回転可能な球体保持手段と、前記撮影位置に保持された球体にＸ線を照射するＸ線照射手段と、該Ｘ線により照射された球体の透過画像を取り込む画像取り込み手段と、該画像取り込み手段から取り込まれた球体の透過画像を処理し、該球体の均質性を判定する画像処理判定手段とを具備し、前記球体搬送手段は、前記球体を横方向に搬送するコンベヤベルトと、該コンベヤベルト上に所定の間隔で配置した、前記球体を載置する載置部を有し、前記球体保持手段は、前記球体を吸着保持可能な吸着パッドと、該吸着パッドを昇降しかつ９０°回転可能な昇降回転シリンダを具備し、前記球体保持手段を前記撮影位置の上方に設置し、前記画像取り込み手段とＸ線照射手段を前記球体搬送手段のコンベヤベルトの両側でかつ前記撮影位置に対応する位置となるように対設し、前記画像処理判定手段を、前記球体を一方向から透視した透過画像による各球形層体の中心と９０°回転した方向から透視した透過画像による各球形層体の中心とをそれぞれ求め、前記中心から前記球形層体の球心の座標をそれぞれ求め、最外層の球形層体の球心の座標を原点とした時、最外層の球形層体から数えてｍ番目の球形層体の球心のＸ座標をｘ_m、Ｙ座標をｙ_m、Ｚ座標をｚ_mとし、ｎ番目の球形層体の球心のＸ座標をｘ_n、Ｙ座標をｙ_n、Ｚ座標をｚ_nとすると、Ａ＝〔（ｘ_n−ｘ_m）²＋（ｙ_n−ｙ_m）²＋（ｚ_n−ｚ_m）²〕^1/2で表される式により２層の各球形層体間の芯ずれ量Ａを算出し、該芯ずれ量Ａを予め設定した基準値とそれぞれ比較し、該基準値内にある場合に前記球体の均質性を良好と判定するようにしたことを特徴とする。
【０００８】
本発明の他の球体の均質性判定装置は、少なくとも３層の球形層体を同心状に積層してなる球体の均質性を判定する装置であって、前記球体を撮影位置下方まで搬送する球体搬送手段と、該撮影位置下方まで搬送された球体を保持して撮影位置まで上昇可能で、かつ該球体を９０°回転可能な球体保持手段と、前記撮影位置に保持された球体にＸ線を照射するＸ線照射手段と、該Ｘ線により照射された球体の透過画像を取り込む画像取り込み手段と、該画像取り込み手段から取り込まれた球体の透過画像を処理し、該球体の均質性を判定する画像処理判定手段とを具備し、前記球体搬送手段は、前記球体を横方向に搬送するコンベヤベルトと、該コンベヤベルト上に所定の間隔で配置した、前記球体を載置する載置部を有し、前記球体保持手段は、前記球体を吸着保持可能な吸着パッドと、該吸着パッドを昇降しかつ９０°回転可能な昇降回転シリンダを具備し、前記球体保持手段を前記撮影位置の上方に設置し、前記画像取り込み手段とＸ線照射手段を前記球体搬送手段のコンベヤベルトの両側でかつ前記撮影位置に対応する位置となるように対設し、前記画像処理判定手段を、前記球体を一方向から透視した透過画像による各球形層体の中心と９０°回転した方向から透視した透過画像による各球形層体の中心とをそれぞれ求め、前記中心から前記球形層体の球心の座標をそれぞれ求め、最外層の球形層体の球心の座標を原点とした時、最外層の球形層体から数えてｍ番目の球形層体の球心のＸ座標をｘ_m、Ｙ座標をｙ_m、Ｚ座標をｚ_mとし、最外層の球形層体から数えてｎ番目の球形層体の球心のＸ座標をｘ_n、Ｙ座標をｙ_n、Ｚ座標をｚ_nとすると、Ａ＝〔（ｘ_n−ｘ_m）²＋（ｙ_n−ｙ_m）²＋（ｚ_n−ｚ_m）²〕^1/2で表される式により２層の各球形層体間の芯ずれ量Ａを算出し、該芯ずれ量Ａを予め設定した基準値とそれぞれ比較し、該基準値内にあるか否かを判定し、該基準値内にある球体において、前記透過画像の球形層体の中心を用いて、該透過画像における各球形層体の真円度を求め、該真円度が予め設定した真円度基準値内にある場合に前記球体の均質性を良好と判定するようにしたことを特徴とする。
【０００９】
上記本発明によれば、上述した式により２層の各球形層体間の芯ずれ量Ａを求めることができるので、各球形層体間の球心のずれ量を加味した球体の均質性判定が可能になる。
【００１０】
さらに、球形層体の真円度を加えて球体の均質性を判定することにより、球体の均質性を一層精度よく判定することができる。
【００１１】
【発明の実施の形態】
以下、本発明の構成について添付の図面を参照しながら詳細に説明する。
【００１２】
図１〜３は、本発明の球体の均質性判定装置の一例を示し、１は均質性を判定する球体Ｓを供給する球体供給部、２は球体供給部１から供給された球体Ｓを搬送する球体搬送手段、３は球体ＳにＸ線を照射するＸ線照射手段、４はＸ線により照射された球体Ｓの透過画像を取り込む画像取り込み手段である。
【００１３】
５は球体Ｓを保持しかつ球体Ｓを９０°回転可能な球体保持手段、６は均質性を不良と判定した球体Ｓ’を取り除く不良球体除去手段、７は画像取り込み手段４から取り込まれた球体Ｓの透過画像を処理して球体Ｓの均質性を判定する画像処理判定手段である。球体Ｓは、図４に示すように、少なくとも３層（図では３層を例示）の球形層体Ｓａ，Ｓｂ，Ｓｃを同心状に積層した構成になっている。
【００１４】
ハウジングＨ内の上部一方側で、球体搬送手段２の搬送方向後方側上方に球体供給部１が設置されている。球体供給部１は、均質性を判定する球体Ｓを収容する収容室１１を備えている。収容室１１の傾斜する底面１２の傾斜終端部に形成された開口１３に球体供給ダクト１４が接続されている。開口１３から下方に屈曲して延在する球体供給ダクト１４の下端１４ａは、後述する球体搬送手段２のコンベヤベルト２１の搬送方向後部上方に位置している。
【００１５】
球体供給ダクト１４の中間部には、図２に示すように、球体Ｓを球体搬送手段２に１つずつ供給する供給規制手段１５が配設されている。供給規制手段１５は、球体供給ダクト１４下端側に配置された第１規制シリンダ１５Ａと、開口１３側に配置された第２規制シリンダ１５Ｂから構成されている。両規制シリンダ１５Ａ，１５Ｂは、球体Ｓの直径に相当する距離だけ離間している。
【００１６】
球体Ｓを供給する際に、第１規制シリンダ１５Ａの伸長しているロッド１５ａが縮小して、球体Ｓを１つ球体搬送手段２に供給する。供給後、ロッド１５ａが伸長すると、第２規制シリンダ１５Ｂの伸長しているロッド１５ｂが縮小して、１つの球体Ｓを第１規制シリンダ１５Ａ側に送った後、再びロッド１５ｂが伸長するようになっている。
【００１７】
球体供給部１の下方に球体搬送手段２が設置されている。球体搬送手段２は、一方側から他方側に延在するコンベヤベルト２１を具備している。ハウジングＨ内に水平に横設されたプレート１０１上の、コンベヤベルト２１の搬送方向前後の位置に支持体２２Ａ，２２Ｂがそれぞれ立設され、これら支持体２２Ａ，２２Ｂの上端部にローラ２３Ａ，２３Ｂが回転自在に取り付けられている。この搬送方向前後のローラ２３Ａ，２３Ｂ間にコンベヤベルト２１が周回自在に掛回されている。
【００１８】
コンベヤベルト２１の外側面には、球体Ｓを載置する椀状の載置部２４が所定の間隔で配置されている。搬送方向前方側のローラ２３Ａの支持軸２３ａにはプーリ２５が設けられている。プレート１０１上にはコンベヤベルト２１を間欠的に送る駆動モータ２６が設置され、その駆動軸２６ａに固設されたプーリ２７と支持軸２３ａのプーリ２５との間にベルト２８が掛回してある。駆動モータ２６の作動により、コンベヤベルト２１上に設けられた載置部２４が間欠的に撮影位置下方に搬送されるようになっている。
【００１９】
コンベヤベルト２１の両側には、Ｘ線照射手段３と画像取り込み手段４が設置されている。Ｘ線照射手段３と画像取り込み手段４は、コンベヤベルト２１を挟んで搬送方向と直交する水平方向に対設されている。このＸ線照射手段３と画像取り込み手段４との間でかつコンベヤベルト２１の上方が、球体ＳをＸ線により撮影する撮影位置になっている。画像取り込み手段４は、カメラなどから構成され、Ｘ線照射手段３からのＸ線により照射された球体Ｓの透過画像を取り込み、画像処理判定手段７に出力するようにしている。画像取り込み手段４とＸ線照射手段３は、撮影位置に対応する位置となるように対設されている。
【００２０】
撮影位置上方に球体保持手段５が設置されている。球体保持手段５は、ハウジングＨの上壁部Ｈ１に吊設されたブラケット５１に球体Ｓを昇降及び回転させる昇降回転シリンダ５２が固定され、この昇降回転シリンダ５２の下方に延在するロッド５２ａの下端部に、ブラケット５３を介して球体Ｓを吸着保持可能な吸着パッド５４を吊設した構成になっている。
【００２１】
昇降回転シリンダ５２の作動により、吸着パッド５４が昇降しかつ９０°回転でき、これにより球体Ｓを撮影位置まで上昇させ、一方向から及び９０°回転（上下の鉛直軸を中心に回転）した方向から撮影できるようにしている。
【００２２】
コンベヤベルト２１の搬送方向前部側でかつコンベヤベルト２１の一側（Ｘ線照射手段３を設置した側）に不良球体除去手段６が設置されている。不良球体除去手段６は、図３に示すように、プレート１０１上に立設された両支持体６１の上端部間に固設された除去用シリンダ６２を備えている。搬送方向と直交しかつ水平方向に延在する除去用シリンダ６２のロッド６２ａの先端に、板状の除去部材６３が固定されている。
【００２３】
ロッド６２ａは、コンベヤベルト２１上の載置部２４に載置された球体Ｓと同じ高さになっている。ロッド６２ａの伸長により、画像処理判定手段７により均質性が不良と判定された球体Ｓ’を載置部２４からコンベヤベルト２１の他側に押し落とし、載置部２４から取り除くことができるようにしてある。載置部２４から押し落とされた球体Ｓ’は、コンベヤベルト２１の他側に傾斜延設したガイド体１０２の開口１０３から排出ダクト１０４を介して不良球収容部１０５に集められる。
【００２４】
コンベヤベルト２１の搬送方向前方側には、画像処理判定手段７により均質性が良好と判定された球体Ｓを良球収容部１０６に収容するためのガイド部１０７が配設されている。折り返し搬送されるコンベヤベルト２１上の載置部２４から落下した球体Ｓが、ガイド部１０７の傾斜した底ガイド板１０７ａに形成された開口１０８から排出ダクト１０９を介して良球収容部１０６に集められる。
【００２５】
ハウジングＨの下部に画像処理判定手段７が設置されている。画像処理判定手段７は、画像取り込み手段４から入力されたデータに基づき、球体Ｓを一方向から透視した透過画像Ｈ１における各球形層体Ｓａ，Ｓｂ，Ｓｃ・・・の透過画像Ｈ1a，Ｈ1b，Ｈ1c・・・の中心Ｉ1a, Ｉ1b, Ｉ1c・・・と、９０°回転した方向から透視した透過画像Ｈ２における各球形層体Ｓａ，Ｓｂ，Ｓｃ・・・の透過画像Ｈ2a，Ｈ2b，Ｈ2c・・・の中心Ｉ2a, Ｉ2b, Ｉ2c・・・とをそれぞれ求めるようになっている。
【００２６】
さらにこれらの中心から各球形層体Ｓａ，Ｓｂ，Ｓｃ・・・の球心Ｇａ，Ｇｂ，Ｇｃ・・・の座標をそれぞれ求める。即ち、各透過画像Ｈ１，Ｈ２について、図５に示すように、最外層の球形層体Ｓａの透過画像Ｈ1a，Ｈ2aの中心Ｉ1a，Ｉ2aをそれぞれ原点とするＸ−Ｚ座標及びＹ−Ｚ座標を設定する。このＸ−Ｚ座標及びＹ−Ｚ座標を用いて、各透過画像の中心の座標を求めることにより、各球形層体Ｓａ，Ｓｂ，Ｓｃ・・・の球心Ｇａ，Ｇｂ，Ｇｃ・・・の座標をそれぞれ得るのである。なお、ここでは原点が球形層体Ｓａの球心Ｇａの座標である。
【００２７】
上記のように設定されたＸ−Ｚ座標及びＹ−Ｚ座標において、最外層から数えてｍ番目の球形層体Ｓｍの球心Ｇｍの座標をＸ座標をｘ_m、Ｙ座標をｙ_m、Ｚ座標をｚ_mとし、ｎ番目の球形層体Ｓｎの球心ＧｎのＸ座標をｘ_n、Ｙ座標をｙ_n、Ｚ座標をｚ_nとすると、下記式により２層の各球形層体Ｓｍ，Ｓｎ間の芯ずれ量Ａを算出する。但し、ｍは１以上の整数、ｎはｍより大きい整数であり、ｍが１の時はその球形層体は最外層となり、ｘ_m＝ｙ_m＝ｚ_m＝０である。
【００２８】
Ａ＝〔（ｘ_n−ｘ_m）²＋（ｙ_n−ｙ_m）²＋（ｚ_n−ｚ_m）²〕^1/2
算出された芯ずれ量Ａは、予め設定した基準値とそれぞれ比較され、基準値内にある場合に球体Ｓの均質性を良好と判定する。
【００２９】
図中８は、各機器を制御する制御手段であり、規制シリンダ１５Ａ，１５Ｂ、駆動モータ２６、Ｘ線照射手段３、画像取り込み手段４、昇降回転シリンダ５２、吸着パッド５４、除去用シリンダ６２をプログラムに従って制御するようになっている。
【００３０】
９は表示部９ａを備えた操作盤であり、この操作盤９から画像処理判定手段７及び制御手段８に球体Ｓの判定に必要なデータをインプットできるようにしている。Ｚは撮影位置下方で停止したコンベヤベルト２１上の載置部２４に判定する球体Ｓがあるか否かを検出する発光部Ｚ１と受光部Ｚ２を有するセンサ部であり、球体保持手段５の下方でかつコンベヤベルト２１の両側に発光部Ｚ１と受光部Ｚ２が対設されている。
【００３１】
以下、上述した装置により３層構造の球体Ｓの均質性を判定する方法について説明する。先ず、球体供給部１の収容室１１に収容された球体Ｓが、球体供給ダクト１４を介して、規制シリンダ１５Ａ，１５Ｂにより１つずつコンベヤベルト２１上の載置部２４に供給される。
【００３２】
載置部２４に載置された球体Ｓは、駆動モータ２６の作動により間欠的に移動（載置部２４間の離間距離ずつ間欠移動）するコンベヤベルト２１上を横方向に搬送される。球体ＳがＸ線照射手段３と画像取り込み手段４間でかつ球体保持手段５の下方の撮影位置下方まで搬送されてきたのをセンサ部Ｚが検出すると、昇降回転シリンダ５２のロッド５２ａが伸長し、吸着パッド５４が降下して球体Ｓを吸着保持する。
【００３３】
次いで、ロッド５２ａが縮小し、球体Ｓを吸着保持した吸着パッド５４を図１に示す撮影位置まで上昇させる。球体Ｓが撮影位置にくると、Ｘ線照射手段３からＸ線が球体Ｓに照射される。画像取り込み手段４により一方向から球体Ｓを透視した透過画像Ｈ１（図５（ａ））が取り込まれる。
【００３４】
昇降回転シリンダ５２のロッド５２ａが鉛直方向を回転の中心軸にして９０°回転すると、再びＸ線照射手段３からＸ線が球体Ｓに照射され、画像取り込み手段４が９０°回転した方向からの球体Ｓの透過画像Ｈ２（図５（ｂ））を取り込む。画像取り込み手段４に取り込まれた球体Ｓの透過画像Ｈ１，Ｈ２は、それぞれ画像処理判定手段７にインプットされる。
【００３５】
画像処理判定手段７では、球体Ｓを一方向から透視した透過画像Ｈ１における各球形層体Ｓａ，Ｓｂ，Ｓｃの透過画像Ｈ1a，Ｈ1b，Ｈ1cの中心Ｉ1a，Ｉ1b，Ｉ1cと、９０°回転した方向から透視した透過画像Ｈ２における各球形層体Ｓａ，Ｓｂ，Ｓｃの透過画像Ｈ2a，Ｈ2b，Ｈ2cの中心Ｉ2a，Ｉ2b，Ｉ2cをそれぞれ求める。次いで、これら中心Ｉ1a，Ｉ1b，Ｉ1c，Ｉ2a，Ｉ2b，Ｉ2cから各球形層体Ｓａ，Ｓｂ，Ｓｃの球心Ｇａ，Ｇｂ，Ｇｃの座標を、上述したように最外層の球形層体Ｓａの透過画像Ｈ1a，Ｈ2aの中心Ｉ1a，Ｉ2aをそれぞれ原点とするＸ−Ｚ座標及びＹ−Ｚ座標を用いてそれぞれ算出する。
【００３６】
そして、上記式により２層の各球形層体Ｓａ，Ｓｂ、Ｓｂ，Ｓｃ及びＳｃ，Ｓａ間の芯ずれ量Ａを算出する。これら算出された芯ずれ量Ａが予め設定した基準値とそれぞれ比較される。芯ずれ量Ａがいずれも基準値内にある場合には球体Ｓの均質性を良好と判定し、基準値外にある場合は球体Ｓの均質性を不良と判定する。
【００３７】
他方、撮影が終了した球体Ｓは、昇降回転シリンダ５２のロッド５２ａの伸長により、コンベヤベルト２１上の載置部２４に戻される。球体Ｓが戻されると、載置部２４間の離間距離だけ載置部２４が搬送され、撮影位置下方にきた次の球体Ｓが上述した球体と同様にしてその均質性が判定される。
【００３８】
判定が終了した球体Ｓが除去用シリンダ６２のところまで搬送されてくると、それが均質性不良と画像処理判定手段７で判定された球体の場合には、除去用シリンダ６２のロッド６２ａの伸長により除去部材６３が載置台２４上の球体を押し落とす。落とされた球体Ｓ’は、ガイド体１０２上を転がって開口１０３から排出ダクト１０４を介して不良球収容部１０５に収容される。
【００３９】
画像処理判定手段７で均質性が良好と判定された球体はさらに搬送され、コンベヤベルト２１がローラ２３Ａで折り返し移動する際に載置台２４から落下し、ガイド部１０７の開口１０８から排出ダクト１０９を介して良球収容部１０６に収容される。
【００４０】
上述した本発明によれば、上記した式により２層の各球形層体間の芯ずれ量Ａを得ることができるので、各球形層体間の球心のずれ量を加味して球体Ｓの均質性を判定することが可能になる。
【００４１】
また、従来は球体Ｓの２方向からの透過画像を得る際に、ターンテーブル上の載置部に球体Ｓを載置し、ターンテーブルを回転させてそれぞれの方向から球体Ｓの透過画像を得るようにしていたので、２組のＸ線照射手段と画像取り込み手段が必要であったが、球体保持手段５に吸着パッド５４を昇降しかつ９０°回転可能な昇降回転シリンダ５２を採用したので、１組のＸ線照射手段３と画像取り込み手段４で済む結果、コストの削減が可能になる。しかも、球体Ｓを吸着パッド５４により吸着保持するようにしたので、球体Ｓの保持不良を大きく低減することができる。
【００４２】
本発明では、上述した画像処理判定手段７を、各芯ずれ量Ａが基準値内にある球体において、さらに上記２方向からの透過画像Ｈ１，Ｈ２における各球形層体Ｓａ，Ｓｂ，Ｓｃの透過画像Ｈ1a，Ｈ1b，Ｈ1cとＨ2a，Ｈ2b，Ｈ2cの中心Ｉ1a，Ｉ1b，Ｉ1cとＩ2a，Ｉ2b，Ｉ2cを用いて、その透過画像Ｈ1a，Ｈ1b，Ｈ1cとＨ2a，Ｈ2b，Ｈ2cの真円度を求め、その真円度が予め設定した真円度基準値内にある場合には球体Ｓの均質性を良好と判定するようにしてもよい。
【００４３】
真円度の求め方としては、例えば、図５に示すように、透過画像Ｈ１，Ｈ２におけるそれぞれの球形層体Ｓａ，Ｓｂ，Ｓｃの透過画像Ｈ1a，Ｈ1b，Ｈ1cとＨ2a，Ｈ2b，Ｈ2cの中心Ｉ1a，Ｉ1b，Ｉ1cとＩ2a，Ｉ2b，Ｉ2cからその層体外面までの距離ｒ１，ｒ２，ｒ３を９０°間隔で算出した値を用いることができる。この層体外面までの距離ｒ１，ｒ２，ｒ３がそれぞれの予め設定した真円度基準値内にある場合に、球体Ｓの均質性を良好と判定するのである。このような真円度の採用により、球体Ｓの均質性を一層精度よく判定することが可能になる。
【００４４】
本発明は、特に３層以上の多層構造をもつゴルフボールの均質性を判定するのに好ましく用いることができるが、それに限定されず、少なくとも３層の球形層体を同心状に積層してなる球体であれば、いずれの球体にも好適に用いることができる。
【００４５】
【発明の効果】
上述したように本発明は、球体を一方向から透視した透過画像と９０°回転した方向から透視した透過画像とにより各球形層体の球心の座標をそれぞれ求め、それを用いて２層の各球形層体間の芯ずれ量Ａを上記した式により算出して基準値内にある場合に球体の均質性を良好と判定するので、少なくとも３層の球形層体を同心状に積層してなる球体において、各球形層体間の球心のずれ量を加味して均質性を判定することができる。
【図面の簡単な説明】
【図１】本発明の球体の均質性判定装置の一例を一部断面で示す正面図である。
【図２】図１のＢ−Ｂ矢視図である。
【図３】載置部の球体を除いて示す図１のＥ−Ｅ矢視図である。
【図４】球体の一例を示す断面図である。
【図５】（ａ）は一方向からの球体の透過画像、（ｂ）は９０°回転した方向からの球体の透過画像、（ｃ）は各球形層体の球心を示す球体の正面図である。
【符号の説明】
１球体供給部２球体搬送手段
３Ｘ線照射手段４画像取り込み手段
６不良球体除去手段７画像処理判定手段
２１コンベヤベルト２４載置部
５２昇降回転シリンダ５４吸着パッド
Ｇａ，Ｇｂ，Ｇｃ球心Ｈ１，Ｈ２球体の透過画像
Ｈ1a，Ｈ1b, Ｈ1c, Ｈ2a, Ｈ2b, Ｈ2c 球形層体の透過画像
Ｉ1a，Ｉ1b, Ｉ1c, Ｉ2a, Ｉ2b, Ｉ2c 透過画像の中心
Ｓ球体Ｓａ，Ｓｂ，Ｓｃ球形層体[0001]
BACKGROUND OF THE INVENTION
The present invention relates to homogeneous-size TeiSo location of the sphere, such as a golf ball and, more particularly, in the sphere formed by laminating a spherical layer body of at least three layers concentrically, the spherical center between the spherical layer body about homogeneity-size TeiSo location of spheres so as to determine the homogeneity using the shift amount.
[0002]
[Prior art]
Generally, a golf ball has a two-layer structure in which a spherical outer skin layer is laminated on the outer side of a spherical core. In a golf ball formed by concentrically stacking such spherical layer bodies, the homogeneity is judged using the amount of deviation of the spherical center between the spherical layer bodies (in this case, between the core body and the outer skin layer). I have to. The X-ray transparent image seen through from one direction and the transparent image seen through from 90 ° apart are respectively captured by the camera, the spherical center of the spherical layer is calculated from those image data, and the deviation of the spherical center Is within a preset reference value, it is determined that the homogeneity is good.
[0003]
By the way, in recent years, in order to balance flight distance, spin performance, softness and the like in a high dimension, golf balls having a multilayer structure in which three or more spherical layers are concentrically stacked have come to be used. . In such a multi-layered golf ball, when judging its homogeneity, it is necessary to consider the deviation of the sphere center between the spherical layer bodies. There was a problem that could not be done.
[0004]
[Problems to be solved by the invention]
It is an object of the present invention to provide a sphere in which at least three spherical layer bodies are concentrically stacked, and the uniformity of the sphere can be determined by taking into account the deviation of the sphere center between the spherical layer bodies. to provide a homogeneous-size TeiSo location.
[0006]
The sphere homogeneity determination device of the present invention that achieves the above object is a device for determining the homogeneity of a sphere formed by concentrically stacking at least three spherical layer bodies, and the sphere is moved down to the photographing position. A sphere conveying means for conveying, a sphere holding means capable of holding the sphere conveyed to the lower part of the photographing position and moving up to the photographing position and rotating the sphere by 90 °; and a sphere held at the photographing position. X-ray irradiating means for irradiating X-rays, image capturing means for capturing a transmission image of a sphere irradiated with the X-rays, and processing of a transmission image of the sphere captured from the image capturing means, and homogeneity of the sphere Image processing determining means for determining the sphere , the sphere conveying means is a conveyor belt for conveying the sphere in a lateral direction, and a placement for placing the sphere arranged at a predetermined interval on the conveyor belt Part The recording sphere holding means includes a suction pad capable of sucking and holding the sphere, and a lifting and lowering rotation cylinder capable of lifting and lowering the suction pad and rotating 90 °, and the sphere holding means is installed above the photographing position. The image capturing means and the X-ray irradiating means are provided opposite to each other on both sides of the conveyor belt of the sphere conveying means and corresponding to the imaging position, and the image processing determining means is seen through the sphere from one direction. The center of each spherical layer body obtained from the transmitted image and the center of each spherical layer body obtained from the transparent image seen through the direction rotated by 90 ° are respectively obtained, and the coordinates of the spherical center of the spherical layer body are obtained from the center, respectively. when the coordinates of the spherical center of the spherical layer of the outer layer is the origin, the X-coordinate x _m of the spherical center of the m-th spherical layer member counted from spherical layer of the outermost layer, the Y-coordinate y _m, Z coordinates z _m and the sphere of the n th spherical layer If the X coordinate of the heart is x _n , the Y coordinate is y _n , and the Z coordinate is z _n , A = [(x _n −x _m ) ² + (y _n −y _m ) ² + (z _n −z _m ) ² ] The misalignment amount A between the spherical layers of the two layers is calculated by the formula represented by ^1/2 , the misalignment amount A is compared with a preset reference value, and is within the reference value. In this case, the homogeneity of the sphere is determined to be good.
[0008]
Another device for determining homogeneity of a sphere according to the present invention is a device for determining the homogeneity of a sphere formed by concentrically stacking at least three layers of spheres, and transports the sphere to a position below the photographing position. X-rays are transmitted to the sphere held at the imaging position, the conveying means, the sphere holding means capable of holding the sphere conveyed to the lower side of the imaging position and being able to move up to the imaging position and rotating the sphere by 90 °. X-ray irradiating means for irradiating, image capturing means for capturing a transmission image of a sphere irradiated with the X-rays, and processing the transmission image of the sphere captured from the image capturing means to determine the homogeneity of the sphere Image processing determining means, and the sphere conveying means has a conveyor belt for conveying the sphere in the lateral direction, and a placing portion for placing the sphere arranged on the conveyor belt at a predetermined interval. And the hand holding the sphere Comprises a suction pad capable of sucking and holding the sphere, and a lifting / lowering cylinder capable of lifting and lowering the suction pad and rotating by 90 °, the sphere holding means being installed above the photographing position, and the image capturing means And the X-ray irradiating means are arranged on both sides of the conveyor belt of the sphere conveying means so as to correspond to the photographing position, and the image processing determining means is based on a transmission image obtained by seeing through the sphere from one direction. The center of each spherical layer body and the center of each spherical layer body by a transmission image seen through from a direction rotated by 90 ° are respectively obtained, and the coordinates of the spherical center of the spherical layer body are respectively obtained from the center, and the outermost spherical layer is obtained. when the coordinates of the spherical center of the body as an origin, the X-coordinate x _m of the spherical center of the m-th spherical layer member counted from spherical layer of the outermost layer, the Y-coordinate and y _m, the Z-coordinate and z _m, Nth counting from the outermost spherical layer A = [(x _n −x _m ) ² + (y _n −y _m ) ² + (z) _where X _n of the spherical center of the spherical layer is x _n , Y coordinate is y _n , and Z coordinate is z _n. _n− z _m ) ² ] ^1/2 to calculate the misalignment amount A between the two spherical layered bodies, compare the misalignment amount A with a preset reference value, It is determined whether or not it is within a reference value, and for a sphere that is within the reference value, the roundness of each spherical layer body in the transmission image is obtained using the center of the spherical layer body of the transmission image, When the roundness is within a preset roundness reference value, the homogeneity of the sphere is determined to be good.
[0009]
According to the present invention, since the misalignment amount A between the two spherical layer bodies can be obtained by the above-described formula, the homogeneity determination of the sphere taking into account the misalignment amount of the spherical center between the spherical layer bodies. Is possible.
[0010]
Further, by determining the homogeneity of the sphere by adding the roundness of the spherical layered body, the homogeneity of the sphere can be determined with higher accuracy.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings.
[0012]
1 to 3 show an example of a sphere homogeneity determination apparatus according to the present invention, where 1 is a sphere supply unit that supplies a sphere S for determining homogeneity, and 2 is a sphere S supplied from the sphere supply unit 1. Sphere transporting means 3, X-ray irradiating means 3 for irradiating the sphere S with X-rays, and 4, an image capturing means for capturing a transmission image of the sphere S irradiated with X-rays.
[0013]
Reference numeral 5 denotes a sphere holding means that holds the sphere S and can rotate the sphere S by 90 °, 6 is a defective sphere removing means that removes the sphere S ′ that is determined to have poor homogeneity, and 7 is a sphere that is captured from the image capturing means 4. The image processing determination means determines the homogeneity of the sphere S by processing the transmission image of S. As shown in FIG. 4, the spherical body S has a configuration in which spherical layer bodies Sa, Sb, Sc of at least three layers (three layers are illustrated in the figure) are concentrically stacked.
[0014]
On one side of the upper part in the housing H, the sphere supply unit 1 is installed on the rear side in the conveying direction of the sphere conveying means 2. The sphere supply unit 1 includes a storage chamber 11 that stores a sphere S for determining homogeneity. A sphere supply duct 14 is connected to an opening 13 formed in the inclined end portion of the inclined bottom surface 12 of the storage chamber 11. A lower end 14a of a sphere supply duct 14 that is bent downward and extends from the opening 13 is positioned above the rear in the conveyance direction of the conveyor belt 21 of the sphere conveyance means 2 described later.
[0015]
As shown in FIG. 2, supply regulating means 15 for supplying the sphere S to the sphere conveying means 2 one by one is disposed in the middle part of the sphere supply duct 14. The supply restricting means 15 includes a first restricting cylinder 15A disposed on the lower end side of the spherical body supply duct 14 and a second restricting cylinder 15B disposed on the opening 13 side. Both regulating cylinders 15A and 15B are separated by a distance corresponding to the diameter of the sphere S.
[0016]
When supplying the sphere S, the extending rod 15a of the first restricting cylinder 15A is contracted to supply one sphere S to the sphere conveying means 2. After the supply, when the rod 15a is extended, the extending rod 15b of the second restriction cylinder 15B is reduced, and after sending one sphere S to the first restriction cylinder 15A side, the rod 15b is extended again. It has become.
[0017]
A sphere conveying means 2 is installed below the sphere supplying unit 1. The spherical body conveying means 2 includes a conveyor belt 21 extending from one side to the other side. Supports 22A and 22B are erected on the plate 101 horizontally disposed in the housing H at positions before and after the conveying direction of the conveyor belt 21, and rollers 23A and 23B are provided at upper ends of these supports 22A and 22B. Is mounted rotatably. A conveyor belt 21 is looped around the rollers 23A and 23B before and after the conveying direction.
[0018]
On the outer surface of the conveyor belt 21, bowl-like placement portions 24 on which the spheres S are placed are arranged at predetermined intervals. A pulley 25 is provided on the support shaft 23a of the roller 23A on the front side in the transport direction. A drive motor 26 for intermittently feeding the conveyor belt 21 is installed on the plate 101, and a belt 28 is wound between a pulley 27 fixed to the drive shaft 26a and a pulley 25 of the support shaft 23a. By the operation of the drive motor 26, the placing portion 24 provided on the conveyor belt 21 is intermittently conveyed below the photographing position.
[0019]
On both sides of the conveyor belt 21, X-ray irradiation means 3 and image capturing means 4 are installed. The X-ray irradiating means 3 and the image capturing means 4 are provided in a horizontal direction perpendicular to the conveying direction with the conveyor belt 21 interposed therebetween. Between the X-ray irradiating means 3 and the image capturing means 4 and above the conveyor belt 21 is an imaging position for imaging the sphere S with X-rays. The image capturing means 4 is constituted by a camera or the like, and captures a transmission image of the sphere S irradiated with X-rays from the X-ray irradiation means 3 and outputs it to the image processing determination means 7. The image capturing means 4 and the X-ray irradiation means 3 are arranged so as to be in a position corresponding to the imaging position.
[0020]
A spherical body holding means 5 is installed above the photographing position. The spherical body holding means 5 includes a bracket 51 suspended on the upper wall H1 of the housing H, and a vertical rotating cylinder 52 that lifts and lowers the spherical body S is fixed, and a rod 52a extending below the vertical rotating cylinder 52 is fixed. A suction pad 54 capable of sucking and holding the sphere S via a bracket 53 is suspended from the lower end portion.
[0021]
The suction pad 54 can be moved up and down and rotated by 90 ° by the operation of the lifting and lowering rotation cylinder 52, thereby raising the sphere S to the photographing position and rotating from one direction by 90 ° (rotating around the vertical vertical axis). You can shoot from.
[0022]
The defective sphere removing means 6 is installed on the front side in the conveying direction of the conveyor belt 21 and on one side of the conveyor belt 21 (the side on which the X-ray irradiation means 3 is installed). As shown in FIG. 3, the defective sphere removing means 6 includes a removing cylinder 62 fixed between upper ends of both supports 61 erected on the plate 101. A plate-like removal member 63 is fixed to the tip of the rod 62a of the removal cylinder 62 that is orthogonal to the transport direction and extends in the horizontal direction.
[0023]
The rod 62 a has the same height as the sphere S placed on the placement portion 24 on the conveyor belt 21. By extending the rod 62a, the sphere S ′ determined to be poor in homogeneity by the image processing determination means 7 can be pushed down from the mounting portion 24 to the other side of the conveyor belt 21 and removed from the mounting portion 24. It is. The sphere S ′ pushed down from the placing portion 24 is collected in the defective sphere housing portion 105 through the discharge duct 104 from the opening 103 of the guide body 102 that is inclined and extended to the other side of the conveyor belt 21.
[0024]
On the front side in the conveying direction of the conveyor belt 21, a guide unit 107 is provided for storing the sphere S determined to have good homogeneity by the image processing determination unit 7 in the good ball storage unit 106. The spheres S that have fallen from the placement portion 24 on the conveyor belt 21 that is conveyed back and forth are collected in the good sphere accommodating portion 106 through the discharge duct 109 from the opening 108 formed in the inclined bottom guide plate 107a of the guide portion 107. It is done.
[0025]
An image processing determination unit 7 is installed in the lower part of the housing H. Based on the data input from the image capturing means 4, the image processing determining means 7 transmits the transparent images H1a, H1b,... Of the spherical layer bodies Sa, Sb, Sc... In the transparent image H1 seen through the sphere S from one direction. H1c... Center images I1a, I1b, I1c... And transmission images H2a, H2b, H2c... Of each spherical layer body Sa, Sb, Sc. The centers I2a, I2b, I2c,.
[0026]
Further, the coordinates of the spherical centers Ga, Gb, Gc... Of each spherical layered body Sa, Sb, Sc. That is, for each of the transmission images H1 and H2, as shown in FIG. 5, the XZ coordinates and YZ coordinates with the origins at the centers I1a and I2a of the transmission images H1a and H2a of the outermost spherical layer Sa are provided. Set. By using these X-Z coordinates and Y-Z coordinates, the coordinates of the center of each transmission image are obtained, so that the spherical centers Ga, Gb, Gc... Of each spherical layer body Sa, Sb, Sc. Get the coordinates respectively. Here, the origin is the coordinates of the spherical center Ga of the spherical layered body Sa.
[0027]
In the set X-Z coordinate and Y-Z coordinate as mentioned above, the spherical center Gm coordinates the X coordinate x _m of the m-th spherical layer body Sm counted from the outermost layer, the Y-coordinate y _m, Z Assuming that the coordinate is z _m , the X coordinate of the sphere center Gn of the n-th spherical layer Sn is x _n , the Y coordinate is y _n , and the Z coordinate is z _n , each of the two layers of spherical layers Sm, The misalignment amount A between Sn is calculated. However, m represents an integer of 1 or more, n is an m an integer greater than, m is becomes its spherical layer body outermost when 1 is _{_{_{x m = y m = z m}}} = 0.
[0028]
A = [(x _n −x _m ) ² + (y _n −y _m ) ² + (z _n −z _m ) ² ] ^1/2
The calculated misalignment amount A is respectively compared with a reference value set in advance, and when it is within the reference value, the homogeneity of the sphere S is determined to be good.
[0029]
Reference numeral 8 in the figure denotes control means for controlling each device. The restriction cylinders 15A and 15B, the drive motor 26, the X-ray irradiation means 3, the image capturing means 4, the up-and-down rotation cylinder 52, the suction pad 54, and the removal cylinder 62 are provided. It is controlled according to the program.
[0030]
Reference numeral 9 denotes an operation panel provided with a display unit 9a. Data required for determining the sphere S can be input from the operation panel 9 to the image processing determination means 7 and the control means 8. Z is a sensor unit having a light emitting unit Z1 and a light receiving unit Z2 for detecting whether or not there is a sphere S to be determined on the placing unit 24 on the conveyor belt 21 stopped below the photographing position. And the light emission part Z1 and the light-receiving part Z2 are provided oppositely by the both sides of the conveyor belt 21, respectively.
[0031]
Hereinafter, a method for determining the homogeneity of the three-layered sphere S using the above-described apparatus will be described. First, the sphere S accommodated in the accommodation chamber 11 of the sphere supply unit 1 is supplied to the placement unit 24 on the conveyor belt 21 one by one by the regulation cylinders 15A and 15B via the sphere supply duct 14.
[0032]
The sphere S placed on the placement unit 24 is transported in the lateral direction on the conveyor belt 21 that is intermittently moved (intermittent movement by the separation distance between the placement units 24) by the operation of the drive motor 26. When the sensor unit Z detects that the sphere S has been transported between the X-ray irradiating means 3 and the image capturing means 4 and below the imaging position below the sphere holding means 5, the rod 52a of the elevating rotary cylinder 52 extends. The suction pad 54 descends and holds the sphere S by suction.
[0033]
Next, the rod 52a is reduced, and the suction pad 54 holding the sphere S is lifted to the photographing position shown in FIG. When the sphere S comes to the imaging position, the sphere S is irradiated from the X-ray irradiation means 3. The image capturing means 4 captures a transmission image H1 (FIG. 5 (a)) seen through the sphere S from one direction.
[0034]
When the rod 52a of the ascending / descending rotation cylinder 52 rotates 90 ° with the vertical direction as the central axis of rotation, the X-ray is irradiated again from the X-ray irradiating means 3, and the image capturing means 4 is rotated from the direction rotated 90 °. A transmission image H2 of the sphere S (FIG. 5B) is captured. The transmission images H1 and H2 of the sphere S captured by the image capturing unit 4 are input to the image processing determination unit 7, respectively.
[0035]
In the image processing determination means 7, the transmission images H1 of the spherical layers Sa, Sb, Sc in the transmission image H1 seen through the sphere S from one direction and the centers I1a, I1b, I1c of the spherical layers Sa1, S1b, H1c and the direction rotated by 90 °. The centers I2a, I2b, and I2c of the transmission images H2a, H2b, and H2c of the spherical layered bodies Sa, Sb, and Sc in the transparent image H2 that is seen through are respectively obtained. Next, the coordinates of the spherical centers Ga, Gb, Gc of the spherical layer bodies Sa, Sb, Sc from these centers I1a, I1b, I1c, I2a, I2b, I2c are transmitted through the outermost spherical layer body Sa as described above. Calculation is performed using XZ coordinates and YZ coordinates with the centers I1a and I2a of the images H1a and H2a as origins, respectively.
[0036]
Then, the misalignment amount A between the two layers of spherical layers Sa, Sb, Sb, Sc and Sc, Sa is calculated by the above formula. These calculated misalignment amounts A are respectively compared with preset reference values. When the misalignment amount A is both within the reference value, the homogeneity of the sphere S is determined to be good, and when it is outside the reference value, the homogeneity of the sphere S is determined to be poor.
[0037]
On the other hand, the sphere S for which imaging has been completed is returned to the placement unit 24 on the conveyor belt 21 by the extension of the rod 52a of the lifting and lowering rotation cylinder 52. When the sphere S is returned, the placement unit 24 is transported by a separation distance between the placement units 24, and the homogeneity of the next sphere S coming below the photographing position is determined in the same manner as the sphere described above.
[0038]
When the determined sphere S is conveyed to the removal cylinder 62, if it is a sphere determined by the image processing determination means 7 as being inhomogeneous, the rod 62a of the removal cylinder 62 is extended. As a result, the removing member 63 pushes down the sphere on the mounting table 24. The dropped sphere S ′ rolls on the guide body 102 and is accommodated in the defective sphere accommodating portion 105 from the opening 103 via the discharge duct 104.
[0039]
The spheres that are determined to have good homogeneity by the image processing determination means 7 are further transported and fall from the mounting table 24 when the conveyor belt 21 is turned back by the rollers 23A, and the discharge duct 109 passes through the opening 108 of the guide portion 107. Through the good ball housing portion 106.
[0040]
According to the present invention described above, since the misalignment amount A between the two spherical layer bodies can be obtained by the above formula, the spherical center S between the spherical layer bodies is taken into account. It becomes possible to determine the homogeneity.
[0041]
Further, conventionally, when obtaining a transmission image of the sphere S from two directions, the sphere S is placed on the placement portion on the turntable, and the turntable is rotated to obtain a transmission image of the sphere S from each direction. Therefore, two sets of X-ray irradiation means and image capturing means were necessary, but because the elevating rotary cylinder 52 capable of raising and lowering the suction pad 54 and rotating 90 ° was adopted as the spherical body holding means 5, As a result of the need for only one set of X-ray irradiation means 3 and image capturing means 4, cost can be reduced. In addition, since the sphere S is sucked and held by the suction pad 54, the holding failure of the sphere S can be greatly reduced.
[0042]
In the present invention, the above-described image processing determination means 7 is used to transmit the spherical layer bodies Sa, Sb, Sc in the transmission images H1, H2 from the two directions in the spherical body in which the misalignment amount A is within the reference value. Using the centers I1a, I1b, I1c and I2a, I2b, I2c of the images H1a, H1b, H1c and H2a, H2b, H2c, the roundness of the transmitted images H1a, H1b, H1c and H2a, H2b, H2c is obtained. When the roundness is within a preset roundness reference value, the homogeneity of the sphere S may be determined to be good.
[0043]
As a method for obtaining the roundness, for example, as shown in FIG. 5, the centers of the transmission images H1a, H1b, H1c and H2a, H2b, H2c of the respective spherical layer bodies Sa, Sb, Sc in the transmission images H1, H2. Values obtained by calculating the distances r1, r2, r3 from I1a, I1b, I1c and I2a, I2b, I2c to the outer surface of the layered body at 90 ° intervals can be used. When the distances r1, r2, and r3 to the outer surface of the layered body are within the preset circularity reference values, the uniformity of the sphere S is determined to be good. By adopting such roundness, the homogeneity of the sphere S can be determined with higher accuracy.
[0044]
In particular, the present invention can be preferably used to determine the homogeneity of a golf ball having a multilayer structure of three or more layers, but is not limited to this, and is formed by concentrically laminating at least three spherical layers. Any sphere can be used suitably.
[0045]
【The invention's effect】
As described above, according to the present invention, the coordinates of the spherical center of each spherical layer body are obtained by using a transmission image obtained by seeing through a sphere from one direction and a transmission image obtained by seeing through a direction rotated by 90 °, respectively. When the amount of misalignment A between the spherical layer bodies is calculated by the above formula and is within the reference value, it is determined that the homogeneity of the sphere is good. Therefore, at least three spherical layer bodies are stacked concentrically. In the sphere, the homogeneity can be determined in consideration of the shift amount of the sphere center between the spherical layer bodies.
[Brief description of the drawings]
FIG. 1 is a front view showing a partial cross-sectional view of an example of a sphere homogeneity determining apparatus according to the present invention.
FIG. 2 is a view taken along arrow BB in FIG.
FIG. 3 is a view taken along the line EE of FIG. 1 except for a sphere of the placement unit.
FIG. 4 is a cross-sectional view showing an example of a sphere.
5A is a transmission image of a sphere from one direction, FIG. 5B is a transmission image of a sphere from a direction rotated by 90 °, and FIG. 5C is a front view of the sphere showing the spherical center of each spherical layer body. It is.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Sphere supply part 2 Sphere conveyance means 3 X-ray irradiation means 4 Image capture means 6 Defective sphere removal means 7 Image processing determination means 21 Conveyor belt 24 Placement part 52 Lifting rotary cylinder 54 Suction pad Ga, Gb, Gc Ball center H1, H2 sphere transmission image H1a, H1b, H1c, H2a, H2b, H2c Spherical layer transmission image I1a, I1b, I1c, I2a, I2b, I2c Transmission image center S sphere Sa, Sb, Sc Spherical layered body

Claims

An apparatus for determining the homogeneity of a sphere formed by concentrically stacking at least three spherical layer bodies,
Sphere transporting means for transporting the sphere to the lower part of the photographing position, sphere holding means for holding the sphere transported to the lower part of the photographing position and raising the sphere to the photographing position, and capable of rotating the sphere by 90 °; X-ray irradiating means for irradiating a sphere held in position with X-rays, image capturing means for capturing a transmitted image of the sphere irradiated with the X-rays, and processing of the transmitted image of the sphere captured from the image capturing means And image processing determination means for determining the homogeneity of the sphere,
The sphere conveying means has a conveyor belt that conveys the sphere in a lateral direction, and a placement unit that places the sphere arranged on the conveyor belt at a predetermined interval,
The spherical body holding means includes a suction pad capable of sucking and holding the spherical body, and a lifting and lowering rotation cylinder capable of lifting and lowering the suction pad and rotating 90 °,
The spherical body holding means is installed above the imaging position, and the image capturing means and the X-ray irradiation means are arranged opposite to each other on both sides of the conveyor belt of the spherical body conveying means and corresponding to the imaging position,
The image processing determination means obtains a center of each spherical layer body by a transmission image seen through the sphere from one direction and a center of each spherical layer body by a transmission image seen through from a direction rotated by 90 °, respectively. The coordinates of the spherical center of the spherical layer body are respectively obtained, and the coordinates of the spherical center of the outermost spherical layer body are used as the origin, and the X of the spherical center of the mth spherical layer body counted from the outermost spherical layer body. the coordinate x _m, a Y-coordinate and y _m, the Z-coordinate and z _m, the n-th X-coordinate of the spherical center of the spherical layer body x _n, the Y-coordinate y _n, when the Z-coordinate and z _n, the following formula To calculate the misalignment amount A between the spherical layers of the two layers, compare the misalignment amount A with a preset reference value, and determine that the homogeneity of the sphere is good when it is within the reference value. A device for determining the homogeneity of a sphere.
A = [(x _n −x _m ) ² + (y _n −y _m ) ² + (z _n −z _m ) ² ] ^1/2

An apparatus for determining the homogeneity of a sphere formed by concentrically stacking at least three spherical layer bodies,
Sphere transporting means for transporting the sphere to the lower part of the photographing position, sphere holding means for holding the sphere transported to the lower part of the photographing position and raising the sphere to the photographing position, and capable of rotating the sphere by 90 °; X-ray irradiating means for irradiating a sphere held in position with X-rays, image capturing means for capturing a transmitted image of the sphere irradiated with the X-rays, and processing of the transmitted image of the sphere captured from the image capturing means And image processing determination means for determining the homogeneity of the sphere,
The sphere conveying means has a conveyor belt that conveys the sphere in a lateral direction, and a placement unit that places the sphere arranged on the conveyor belt at a predetermined interval,
The spherical body holding means includes a suction pad capable of sucking and holding the spherical body, and a lifting and lowering rotation cylinder capable of lifting and lowering the suction pad and rotating 90 °,
The spherical body holding means is installed above the imaging position, and the image capturing means and the X-ray irradiation means are arranged opposite to each other on both sides of the conveyor belt of the spherical body conveying means and corresponding to the imaging position,
The image processing determination means obtains a center of each spherical layer body by a transmission image seen through the sphere from one direction and a center of each spherical layer body by a transmission image seen through from a direction rotated by 90 °, respectively. The coordinates of the spherical center of the spherical layer body are respectively obtained, and the coordinates of the spherical center of the outermost spherical layer body are used as the origin, and the X of the spherical center of the mth spherical layer body counted from the outermost spherical layer body. the coordinate x _m, the Y coordinates y _m, Z coordinates and z _m, the X-coordinate x _n of the spherical center of the n-th spherical layer member counted from spherical layer of the outermost layer, the Y-coordinate y _n, Z If the coordinates are z _n , the amount of misalignment A between the spherical layers of the two layers is calculated by the following formula, and the amount of misalignment A is compared with a preset reference value, and whether it is within the reference value In a sphere that is within the reference value, the center of the spherical layer of the transmission image is used to determine the transmission image. Kicking obtains the roundness of each spherical layer body, homogeneity determining unit sphere in which the homogeneity of the sphere to be judged good when in said vacuum circularity is preset roundness reference value within.
A = [(x _n −x _m ) ² + (y _n −y _m ) ² + (z _n −z _m ) ² ] ^1/2

The sphere homogeneity determination device according to claim 1, further comprising a sphere supply unit configured to supply the sphere to the placement unit at a rear upper side in a conveyance direction of the conveyor belt .

4. A sphere according to claim 1, 2 or 3, wherein a defective sphere removing means for removing the sphere determined to be poor in homogeneity by the image processing judging means from the placement section is installed on the front side in the conveying direction of the conveyor belt. Homogeneity judgment device.

On the front side in the conveying direction of the conveyor belt, there is provided a good sphere storage unit in which the spheres determined to have good homogeneity by the image processing determination unit are collected by dropping from the mounting unit on the conveyor belt to be folded and conveyed. The sphere homogeneity determination device according to claim 1, 2, 3 or 4.

The sphere homogeneity determination device according to claim 1, wherein the sphere is a golf ball .