JP4283032B2 - Photoelectric sensor fixture and photoelectric sensor device - Google Patents

Photoelectric sensor fixture and photoelectric sensor device Download PDF

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JP4283032B2
JP4283032B2 JP2003128272A JP2003128272A JP4283032B2 JP 4283032 B2 JP4283032 B2 JP 4283032B2 JP 2003128272 A JP2003128272 A JP 2003128272A JP 2003128272 A JP2003128272 A JP 2003128272A JP 4283032 B2 JP4283032 B2 JP 4283032B2
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sensor
plate
base plate
mounting
fixture
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JP2004336305A (en
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友成 鳥井
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Keyence Corp
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Keyence Corp
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Description

【0001】
【発明が属する技術分野】
本発明は、光電センサの光軸の調整が容易である取付具および光電センサ装置に関するものである。
【0002】
【従来の技術】
一般的に、光電センサを取り付ける方法として、直接光電センサを設置面に取り付ける方法と取付具を利用して光電センサを設置面に取り付ける方法とがある。例えば、直接設置面に取り付ける方法としては、特開2002−43920号公報に開示されているような方法がある。また、取付具を利用して取り付ける方法としては、実開平3−125218号全文あるいは特開平6−230316号公報に開示されているような方法がある。
【0003】
【特許文献1】
特開2002−43920号公報
【0004】
この特開2002−43920号公報は、光電センサの本体ケースに設けられた取付孔を利用して、設置面にボルト留めする開示がある。
【0005】
【特許文献2】
実開平3−125218号全文
【0006】
この実開平3−125218号全文は、その従来技術の記載の中で、L字形の取付金具を用いて光電センサを設置面にネジ留めする開示がある。さらに、L字形の取付金具の一方の面に互いに直交する長孔が設けられる構成の開示がある。取付金具に設けられる孔が長孔であることから、光電センサを固定する位置を変化させることができ、設置面に対し垂直方向の任意の角度に向けて、光電センサの光軸を調整可能である。
【0007】
【特許文献3】
特開平6−230316号公報
【0008】
この特開平6−230316号公報は、光ファイバーヘッドをコ字形取付金具を用いて設置面に固定する開示がある。さらに長孔により角度調整、すなわち光軸調整が容易にできる開示がある。
【0009】
【発明が解決しようとする課題】
光電センサを直接設置面に取り付ける場合、取付具を使用する場合と比較して、小さな設置領域で取り付けが可能となる。ところが、設置面に対して垂直方向の光軸調整が不可能なので、光電センサの個体差による光軸の角度バラツキを一定以内に収める必要があり、光電センサの光学系の設計および製造に対し高い精度が求められる。また同様に、取付設置面の設計および製造に対しても高い精度が求められる。
【0010】
一方、光電センサを取付具を介して設置面に取り付ける場合、長孔が設けられたL字状の取付具を使用することで、設置面に対し垂直方向の光軸調整が可能となる。ところが、この場合、光軸調整により調整された姿勢を固定する作業と、光電センサを取付具に固定する作業を同時に行う必要がある。このため、光電センサを取付具に固定する際に、既に調整された光軸を保持するために、光電センサの姿勢を変化させない配慮が必要となる。
【0011】
本発明の目的は、光軸調整の作業と光電センサを取付具に固定する作業と分離し、さらに設置面に対して垂直方向への光軸調整を片手でも容易に調整可能とする光電センサ装置およびその光電センサ用の取付具を提供することを目的とする。
【0012】
【課題を解決するための手段】
上記の目的を達成するために、光電センサを設置面に取り付けるための光電センサ用取付具において、前記設置面に取り付けるための取付部材を通すための設置取付孔を複数有する取付ベース板と、前記取付ベース板と略平行で前記光電センサを取り付けるための取付部材を通すためのセンサ取付孔を有するセンサ取付板と、前記取付ベース板と前記センサ取付板とのなす角度を変えるための変形部を有し、前記取付ベース板と前記センサ取付板とを所定の距離離間して一体的に連結する接続部と、前記センサ取付板から延出して設けられ、前記角度を変えるための第1突出部と、前記取付ベース板から延出して設けられ、前記第1突出部と平行な面を有し、前記第1突出部と協働して前記角度を変えるための第2突出部と、前記第1突出部または前記第2突出部のいずれか一方に形成されたネジ部を有する孔に螺合すると共に他方に直接的または間接的に当接し、操作されることで前記第1突出部と前記第2突出部との距離を変更し、当該距離の変更に基づいて前記接続部の変形部を変形させながら前記角度を調整する調整ネジと、を備えることを特徴とする。
【0014】
また、前記接続部の変形部は、前記調整ネジでの調整により弾性変形をし、前記取付ベース板と前記センサ取付板とを介して該弾性変形により生じる復元力と前記調整ネジにより、前記取付ベース板と前記センサ取付板とを前記角度に固定することを特徴とする。
【0015】
さらに、前記取付ベース板に設けられる前記第2突出部が、前記取付ベース板から垂直かつ前記センサ取付板側に延びる第1平板と、該第1平板の先端から前記第1突出部に対して離間し略平行に延びる第2平板とからなるL字形をしてなり、前記調整ネジが螺合する前記孔が、前記第2平板上に形成されていることを特徴とする。
【0016】
さらにまた、前記調整ネジと螺合するための前記孔が、前記センサ取付板の前記第1突出部に形成され、前記調整ネジの先端部が取付ベース板の第2突出部を押圧することを特徴とする。
【0017】
さらにまた、前記取付ベース板と前記センサ取付板が略矩形をなし、前記接続部が前記取付ベース板と前記センサ取付板との一端でかつ前記取付ベース板と前記センサ取付板とに水平方向の各両端に接する脚部で構成され、
前記光電センサ用取付具は、さらに前記光電センサが投受光する光を透過するための、前記取付ベース板と前記センサ取付板と前記各脚部とで囲まれる開口部を有することを特徴とする。
【0018】
さらにまた、前記取付ベース板と前記センサ取付板とが平行状態での前記取付ベース板と前記センサ取付板との離間距離が、前記光電センサの取付方向の幅に相当する距離と前記角度を調整するための前記調整ネジのストロークとの和の距離と同等もしくはそれ以上設けられていることを特徴とする。
【0021】
【発明の実施の形態】
以下、本発明の実施の形態を図面に基づいて説明する。ただし、以下に示す実施の形態は、本発明の技術思想を具体化するための光電センサの取付具および光電センサを例示するものであって、本発明は光電センサの取付具および光電センサを以下のものに特定しない。
【0022】
図1は、透過型光電センサの基本構成を示すブロック図である。センサ1は、検出領域における検出対象の有無を検出するものであって、投光部14を有する投光ユニット11と、受光部15を有する受光ユニット12とが検出領域を含む空間を挟んで分離しており、比較出力部16を有する制御ユニット13と信号線を介して接続されている。
投光部14は検出領域に光17を投光し、受光部15はその光17を受光し、比較出力部16は、受光部15での受光量と予め定められたしきい値とを比較し、その比較結果を出力するものである。
【0023】
図2は、図1に対応した本発明の一実施例である透過型光電センサの斜視図を示す。図1と同一の番号を付したものに関しては、図1で説明した内容と同じであるから、ここでの説明は省略する。
投光ユニット11は、投光部14を内蔵し、投光の形状が帯状の平行光である光17を透過するためのレンズカバー19を一つの面に設ける略直方体のケーシング21を有している。投光ユニット11には、ユニット内部を貫通し、対向配置された2つの面に臨む断面略円形の貫通孔11a、11bが設けられている。受光ユニット12も同様に、受光部15を内蔵し、一つの面にレンズカバー20が設けられ、貫通孔12a、12bが設けられている。
【0024】
図3は、図2のセンサ1が設置面に本発明の第1の実施の形態に係る取付具を介して取り付けられる状態を示す斜視図である。
センサ1の投光ユニット11と受光ユニット12は、互いにレンズカバー19、20が向かい合うように、取付具2、3を介して設置面4、5に設置されている。取付具2、3は、互いに対称な形状で実質的に同一であるから、以下、対応する部位は同一の名称ならびに番号とする。
【0025】
取付具2は、略矩形の取付ベース板30と、その取付ベース板30と略同一形状で、かつ取付ベース板30から離間して略平行に配置されるセンサ取付板40と、取付ベース板30の一端部とそれに対向配置されるセンサ取付板40の一端部とを連結する接続部50とから構成される。
接続部50と接するセンサ取付板40の上述した一端部に対向する他端部には、センサ取付板40から外方に向け、かつ略同一平面上に延び、角度調整のために用いる第1突出片部41が設けられる。この第1突出片部41には、センサ取付板40の一端部方向に延びる長孔状の孔41aが形成されている。
接続部50と接する取付ベース板30の上述した一端部に対向する他端部には、取付ベース板30に対し垂直で、かつセンサ取付板40側に延びる第1平板31bと、さらにその第1平板31bの先端部から第1突出片部41と離間して略平行に延びる第2平板31cとで構成されるL字状に形成された第2突出片部31が設けられる。この第2突出片部31は、対向配置される第1突出片部41と協働して角度調整のために用いられる。第2平板31cには、後述する調整ネジ53と螺合するネジ部を有する孔31aが形成されている。
【0026】
調整ネジ53は、センサ取付板40に当接するための頭部53aと雄ネジ部を有する本体部53bとから構成される。調整ネジ53は、第1突出片部41の孔41aを通り、センサ取付板40に頭部53aが当接すると共に、本体部53bの雄ネジ部が第2突出片部31の孔31aと螺合する。この調整ネジ53の締め込みストロークに応じて、第1突出片部41と第2突出片部31との距離を調整可能となっている。言い換えれば、この調整ネジ53の締め込みストロークの調整により、設置面に対する光電センサ装置の光軸調整が可能となる。
【0027】
接続部50は、投光ユニット11のレンスカバー19から投光される光17に干渉しない位置、つまりレンズカバー19に対応して設けられた取付具2の開口部52を挟んで、光17の幅方向の両端部にそれぞれ設けられる一対の脚部50a、50bから構成される。
各脚部50a、50bは、センサ取付板40との接続部近傍に弾性変形可能な変形部50c、50dを有している。より具体的には、調整ネジ53のスクローク調整により、取付ベース板30とセンサ取付板40とを略平行状態と設定した場合、接続部50の各脚部50a、50bには圧縮方向の弾性変形力、つまり調整ネジ53によって連結されている第1突出片部41と第2突出片部31との間に互いを離間させる方向への復元力が加わっている状態が好ましい。
なお、上記実施例では、取付ベース板30とセンサ取付板40とが略平行の状態において、接続部50の変形部50c、50dには圧縮方向の弾性変形力が加わるようにセッティングしたが、取付ベース板30とセンサ取付板40とが略平行の状態において、前記変形部50c、50dに弾性変形力が加わらないようにセッティングしてよいことは言うまでもない。
【0028】
図4は、取付具2を側方から見た側面図である。
取付ベース板30とセンサ取付板40は、それらが平行時の離間距離Dが、角度調整可能な範囲でセンサ取付板40に固定される投光ユニット11と取付ベース板30とが干渉しない距離、つまり、ユニット11の厚みと同等である距離D1と、センサ取付板40の角度調整可能範囲の最大移動距離D2との和の距離と同等またはそれ以上となるように配置されている。実用的には、取付具2全体の厚みを極力抑えたいという観点から、上述した距離D1とD2に若干の寸法を加えたものを離間距離D、取付具2の厚みとすることが好ましい。また、上述した最大移動距離D2は、上記平行状態でのセンサ取付板40に設けられた第1突出片部41と取付ベース板30に設けられた第2突出片部31の第2平板31cとの距離D3と実質的に同等または上記接続部50の脚部50a、50bにおける変形部50c、50dからの距離の違いにより、若干距離D3を距離D2より大きく設定することが好ましい。
また、第2突出片部31において、第1平板31bは、ユニット11を取付ベース板30とセンサ取付板40との間に収めるために、第2平板31cをセンサ取付板40側へ近づけるためのものであり、その第1平板31bにより近づける距離は、ユニット11の厚みと同等である距離D1と実質的に同等かそれ以上設けられている。さらに、第1平板31bは、調整ネジ53と設置面4との干渉を防止する別の目的もあり、この場合、第2平板31cをその第1平板31bにより近づける距離D4は、調整ネジ53の調整に伴う上下方向の最大移動距離に相当する距離と同等またはそれ以上である。
【0029】
なお、ここでは、ユニット11がセンサ取付板40の取付ベース板30側、いわゆる下面に固定される例を示したが、下面と対向する上面に取り付けても良い。また、センサ取付板40の上面側にのみセンサの取り付けする場合が考えられるが、この場合、上述した離間距離Dは、ユニット11の厚みを含む必要はなく、センサ取付板40の角度調整可能範囲の最大移動距離D2のみを考慮して設定すればよい。さらに、この場合、第1平板31bによる第2平板31cのセンサ取付板40側へのオフセット量は、ユニット11の厚みを含む必要はなく、つまり、第2平板31cが取付ベース板30と実質的に同一平面上に設けられていても良い。
【0030】
図5は、取付具2を取付ベース板30側から見た平面図である。
センサ取付板40には、断面略円形のセンサ取付孔40a、40b、40c、40dが設けられている。本実施例における取付具2は、投光ユニット11と受光ユニット12のいずれも取り付け可能な兼用タイプであるため、投光ユニット11を取り付けるためセンサ取付孔40a、40bと受光ユニット12を取り付けるためのセンサ取付孔40c、40dが設けられている。
センサ取付板40に投光ユニット11を取り付ける場合、ユニット11は、図示しないボルトを、ユニット本体に設けられる貫通孔11a、11bを介して、センサ取付板40のセンサ取付孔40aと40bに挿入し、センサ取付板40の上面から図示しないナットで固定される。
このユニット取付の際、取付ベース板30には、取付ベース板30側からのドライバー等の工具による固定作業を容易にするために、センサ取付孔40a、40b、40c、40dに対応する位置に、切り欠き部30a、30b、ならびに30cと開口部30dが設けられている。
【0031】
図6は、取付具2をセンサ取付板40側から見た平面図である。ユニット11を取付具2に取り付けた状態において、取付具2を設置面4に固定できるように、取付ベース板30には、取付ベース板30と略同一平面上で、かつ上記投光ユニット11ならびにセンサ取付板40の外輪郭よりも外向きに延出した突出片部32、33が設けられている。突出片部32、33には、取付具2を設置面4に固定するための取付孔32a、33aが形成され、特に取付孔33aは、取付ベース板30を設置面4に対して同一平面内において回転させることにより光軸調整可能とするため、略円形状の取付孔32aを回転中心として、その回転半径方向に湾曲する長孔形状となっている。
【0032】
次に、光軸調整の手順を図3の側面図である図7(a)、図7(b)を用いて説明する。
まず、取付具2、3に投光ユニット11と受光ユニット12を固定し、続いて各ユニットを固定した状態で取付具2、3を設置面4、5に固定する。この設置面4、5への固定時に、設置面4、5に対して水平方向の光軸調整を行っても良いし、垂直方向調整中でも調整後でも良い。
取付具2、3が設置面4、5へ固定された状態を図7(a)に示す。図7(a)の状態では、投光ユニット11からの光17が、受光ユニット12のレンズカバー20よりも下方に投光されているので、適切な検出が不可能である。この場合、調整ネジ53を締め込むこと、つまり調整ネジ53を回動により下方へ移動させることで、センサ取付板40が当接する頭部53aにより下方に押し下げられる。これにより各脚部50a、50bの変形部50c、50dが変形をし、取付ベース板30に対するセンサ取付板40の角度が変化することで、投光ユニット11からの光17が上方に移動し、受光ユニット12のレンズカバー20の位置に合致する。
図7(b)は、図7(a)におけるユニットの光軸調整が完了した状態を示す側面図である。図7(b)では、調整ネジ53の上下の移動により、取付ベース板30とセンサ取付板40とのなす角を調整し、投光ユニット11からの光17が、受光ユニット12のレンズカバー20に向けて投光されている。この時、ナット54等によりセンサ取付板40の第1突出片部41を調整ネジ53の頭部53aと挟み込んで固定しても良い。これにより、各脚部50a、50bの変形部50c、50dの復元力に基づいて、第1突出片部41を頭部53aと当接する半固定状態のものを、ナット54等で固定状態にするので、強い外力が入力された際や、振動環境下においても設置面4、5に対し垂直方向の光軸が安定する。
【0033】
また、図7(a)とは、反対に投光ユニット11からの光17が、受光ユニット12のレンズカバー20よりも上方に投光されている場合には、調整ネジ53を緩めて光17を下方に移動させ、図7(b)になるように調整すればよい。
【0034】
図8には、本発明の第2の実施の形態に係る取付具6の側面図を示す。センサ1の投光ユニット11は、取付具6を介して設置面4に設置されている。なお、図3の取付具2と同じものについては、同じ名称および同じ番号を付し、それらについては説明を省略する。
取付具6は、調整ネジ53と協働して角度調整を行う部分、すなわち第3突出片部42と第4突出片部34が第1の実施例の取付具2と異なる。より具体的には 取付具6には、調整の際に調整ネジ53により直接的に取付ベース板30に対するセンサ取付板40の角度を調整可能とするために、調整ネジ53と羅合するためのネジ部を有する孔42aがセンサ取付板40と接続している第3突出片部に形成されている。
以下に、取付具6の詳細な説明を行う。
【0035】
取付具6は、略矩形の取付ベース板30と、その取付ベース板30と略同一形状で、かつ取付ベース板30から離間して略平行に配置されるセンサ取付板40と、取付ベース板30の一端部とそれに対向配置されるセンサ取付板40の一端部とを連結する接続部50とから構成される。
接続部50と接するセンサ取付板40の上述した一端部に対向する他端部には、センサ取付板40から外方に向け、かつ略同一平面上に延び、角度調整のために用いる第3突出片部42が設けられる。この第3突出片部42には、後述する調整ネジ53と螺合するためのネジ部を有する孔42aが形成されている。
接続部50と接する取付ベース板30の上述した一端部に対向する他端部には、取付ベース板30から外方に向け、かつ略同一平面上に延び、角度調整のために用いる第4突出片部34が設けられる。この第4突出片部34は、対向配置される第3突出片部42と協働して角度調整のために用いられる。
【0036】
調整ネジ53は、取付ベース板30の第4突出片部34と当接するための先端部53cと雄ネジ部を有する本体部53bから構成される。調整ネジ53は、本体部53bの雄ネジ部が第3突出片部42の孔42aと螺合し、取付ベース板30に先端部53cが当接する。この調整ネジ53の回動に伴う第3突出片部42の上下方向の移動によって、第3突出片部42と第4突出片部34との距離を調整可能となっている。
【0037】
接続部50の各脚部50a、50bは、センサ取付板40との接続部近傍に弾性変形可能な変形部50c、50dを有している。より具体的には、調整ネジ53によるセンサ取付板40の調整により、取付ベース板30とセンサ取付板40とを略平行状態と設定した場合、接続部50の各脚部50a、50bには伸張方向の弾性変形力、つまり調整ネジ53によって連結されている第3突出片部42と第4突出片部34との間に互いを近接させる方向への復元力が加わっている状態が好ましい。
【0038】
次に、光軸調整の手順を説明する。取付具6に投光ユニット11を固定し、続いて投光ユニット11を固定した状態で取付具6を設置面4に固定する。
投光ユニット11からの光17が、所望する領域よりも上方に投光される場合には、調整ネジ53を締めることにより、つまり調整ネジ53を回動することによりセンサ取付板40を下方へ移動させる。これにより接続部50の変形部50c、50dが変形し、取付ベース板30に対するセンサ取付板40なす角が変化することで、投光ユニット11からの光17を下方へ移動できる。
反対に、投光ユニット11からの光17が、所望する領域よりも下方に投光される場合には、調整ネジ53を緩めることにより、投光ユニット11からの光17を上方へ移動できる。
つまり、取付具2では調整ネジ53が上下に移動し、それに伴い角度調整を行っていたが、取付具6は調整ネジ53が上下に移動することなく、調整ネジ53の回動に伴い直接的にセンサ取付板40を調整し角度調整、すなわち光電センサ装置の光軸調整作業が可能である。したがって、調整ネジ53が上下に移動が無いことから、取付具6の第4突出片部34には、取付具2の第2突出片部31の第1平板31bのような、第2平板31cをセンサ取付板40側に近づける構成が無くとも良いということは言うまでもない。
【0039】
なお、本発明は、接続部50の変形部50c、50dが弾性変形する部材で構成されるものに限らず、接続部50の変形部50c、50dが変形または回動しするものにも適用可能である。また、取付ベース板30とセンサ取付板40とを別途連結するバネ等の弾性体を設けるようにして、弾性体の復元力による半固定状態を実現しても良い。
さらに、取付具2の取付ベース板30、センサ取付板40ならびに接続部50は、一体的に形成されているが、別体であっても良い
また上記実施例では、センサ1のユニット11は、取付ベース板30とセンサ取付板40と接続部50および開口部52で囲まれる空間に収まるように取り付けられるが、この取り付け方に限定される必要はなく、ユニット11は、ユニット11の一部が開口部52から突出した状態で取り付けられてもよい。この場合、接続部50の離間距離は、ユニット11と干渉しない距離であることは言うまでもない。さらに、この場合、ユニット11を保護するためにあるいはユニット11を固定するための孔を設けるために、ユニット11のセンサ取付板40側を覆いかつセンサ取付板40と同一平面上に、センサ取付板40から延出する突出部を設けても良い。言い換えれば、接続部50の配置は、ユニット11のレンズカバー19の前方に限らず、ユニット11の側方であっても良い。接続部50をユニット11の側方に配置する場合、接続部50の変形部50c、50dをレンズカバー19あるいは投受光中心等と同一平面上でかつ側方に配置することで、接続部50が側方に配置された部分は角度調整に伴う上下の移動が小さくなるので、角度調整が容易になる。
【0040】
また、本発明は、検出領域に投光し、検出領域からの透過光を受光し、検出領域での検出物体に関する情報を検出する透過型光電センサに限らず、検出領域に投光し、検出領域からの反射光を受光し、検出領域での検出物体に関する情報を検出する反射型光電センサにも同様に適用することができる。また、本発明は、投光ユニットと受光ユニットあるいは投受光ユニットが制御ユニットと分離する分離型の光電センサに限らず、一体的にユニット化された一体型の光電センサにも適用できる。
【0041】
【発明の効果】
以上説明したように本発明の光電センサ用の取付具および光電センサ装置は、センサを取り付ける作業と、光軸を調整する作業とを別々に行えるので、片手であっても容易に光軸の調整ができるという利点がある。また、設置面への直接取り付けと同じ取り付け方向で、かつ垂直方向に対して光軸調整ができるので、コンパクトでかつ光軸調整が可能であるという利点がある。
【図面の簡単な説明】
【図1】透過型光電センサの基本構成を示すブロック図
【図2】図1に対応した本発明の一実施例である透過型光電センサの斜視図
【図3】図2のセンサ1が設置面に本発明の第1の実施の形態に係る取付具を介して取り付けられる状態を示す斜視図
【図4】取付具2を側方から見た側面図
【図5】取付具2を取付ベース板30側から見た平面図
【図6】取付具2をセンサ取付板40側から見た平面図
【図7】(a)取付具2、3が設置面4、5へ固定された状態の側面図(光軸調整前)
(b)取付具2、3が設置面4、5へ固定された状態の側面図(光軸調整後)
【図8】本発明の第2の実施の形態に係る取付具6の斜視図
【符号の説明】
1 光電センサ
2、3、6 取付具
4、5 設置面
11 投光ユニット
12 受光ユニット
17 光
30 取付ベース板
31 第2突出片部
31a 孔
32、33 突出片部
32a、33a 設置取付孔
40 センサ取付板
40a、40b、40c、40d センサ取付孔
41 第1突出片部
41a 孔
50 接続部
50a、50b 脚部
50c、50d 変形部
52 開口部
53 調整ネジ
[0001]
[Technical field to which the invention belongs]
The present invention relates to a fixture and a photoelectric sensor device that can easily adjust an optical axis of a photoelectric sensor.
[0002]
[Prior art]
In general, as a method for attaching the photoelectric sensor, there are a method of directly attaching the photoelectric sensor to the installation surface and a method of attaching the photoelectric sensor to the installation surface using an attachment. For example, as a method of directly attaching to the installation surface, there is a method as disclosed in JP-A-2002-43920. Moreover, as a method of attaching using a fixture, there is a method as disclosed in Japanese Utility Model Laid-Open No. 3-125218 or Japanese Patent Laid-Open No. 6-230316.
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 2002-43920
Japanese Patent Application Laid-Open No. 2002-43920 discloses that an installation surface is bolted using an attachment hole provided in a main body case of a photoelectric sensor.
[0005]
[Patent Document 2]
The full text of Japanese Utility Model Publication 3-125218 [0006]
This full text of Japanese Utility Model Laid-Open No. 3-125218 has a disclosure of screwing a photoelectric sensor to an installation surface using an L-shaped mounting bracket in the description of the prior art. Furthermore, there is a disclosure of a configuration in which long holes orthogonal to each other are provided on one surface of an L-shaped mounting bracket. Since the hole provided in the mounting bracket is a long hole, the position where the photoelectric sensor is fixed can be changed, and the optical axis of the photoelectric sensor can be adjusted to an arbitrary angle perpendicular to the installation surface. is there.
[0007]
[Patent Document 3]
Japanese Patent Laid-Open No. 6-230316
Japanese Laid-Open Patent Publication No. 6-230316 discloses that an optical fiber head is fixed to an installation surface using a U-shaped mounting bracket. Furthermore, there is a disclosure in which angle adjustment, that is, optical axis adjustment can be easily performed by a long hole.
[0009]
[Problems to be solved by the invention]
When the photoelectric sensor is directly attached to the installation surface, the photoelectric sensor can be attached in a small installation area as compared with the case where the attachment tool is used. However, since it is impossible to adjust the optical axis in the direction perpendicular to the installation surface, it is necessary to keep the optical axis angle variation due to individual differences in the photoelectric sensor within a certain range, which is high for the design and manufacture of the optical system of the photoelectric sensor. Accuracy is required. Similarly, high accuracy is required for the design and manufacture of the mounting installation surface.
[0010]
On the other hand, when the photoelectric sensor is attached to the installation surface via a fixture, the optical axis can be adjusted in a direction perpendicular to the installation surface by using an L-shaped fixture provided with a long hole. However, in this case, it is necessary to simultaneously perform the operation of fixing the posture adjusted by the optical axis adjustment and the operation of fixing the photoelectric sensor to the fixture. For this reason, when fixing a photoelectric sensor to a fixture, in order to hold | maintain the already adjusted optical axis, the consideration which does not change the attitude | position of a photoelectric sensor is needed.
[0011]
An object of the present invention is to separate an optical axis adjustment operation from an operation for fixing a photoelectric sensor to a fixture, and further to make an optical axis adjustment in a direction perpendicular to the installation surface easily adjustable with one hand And it aims at providing the fixture for the photoelectric sensors.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, in the photoelectric sensor fixture for mounting the photoelectric sensor on the installation surface, the mounting base plate having a plurality of installation mounting holes for passing the mounting member for mounting on the installation surface; A sensor mounting plate having a sensor mounting hole through which a mounting member for mounting the photoelectric sensor is passed substantially parallel to the mounting base plate; and a deforming portion for changing an angle formed by the mounting base plate and the sensor mounting plate. A connecting portion that integrally connects the mounting base plate and the sensor mounting plate at a predetermined distance apart from each other, and a first protrusion that extends from the sensor mounting plate and changes the angle. A second projecting portion that extends from the mounting base plate, has a surface parallel to the first projecting portion, and changes the angle in cooperation with the first projecting portion; 1 protrusion Alternatively, the first projecting portion and the second projecting portion are screwed into a hole having a threaded portion formed on one of the second projecting portions and directly or indirectly contacted with the other to be operated. And an adjustment screw that adjusts the angle while changing the distance from the projecting portion and deforming the deformed portion of the connecting portion based on the change in the distance .
[0014]
The deformed portion of the connection portion is elastically deformed by adjustment with the adjustment screw, and the mounting force is generated by the restoring force generated by the elastic deformation via the mounting base plate and the sensor mounting plate and the adjustment screw. The base plate and the sensor mounting plate are fixed at the angle.
[0015]
Furthermore, the second projecting portion provided on the mounting base plate includes a first flat plate extending perpendicularly from the mounting base plate and extending toward the sensor mounting plate, and from the tip of the first flat plate to the first projecting portion. The hole is formed in an L shape comprising a second flat plate that is spaced apart and extends substantially in parallel, and the hole into which the adjusting screw is screwed is formed on the second flat plate.
[0016]
Furthermore, the hole for screwing with the adjustment screw is formed in the first protrusion of the sensor mounting plate, and the tip of the adjustment screw presses the second protrusion of the mounting base plate. Features.
[0017]
Furthermore, the mounting base plate and the sensor mounting plate have a substantially rectangular shape, the connecting portion is one end of the mounting base plate and the sensor mounting plate, and is horizontally connected to the mounting base plate and the sensor mounting plate. It consists of legs that touch each end,
The photoelectric sensor fixture further includes an opening surrounded by the attachment base plate, the sensor attachment plate, and the legs for transmitting light projected and received by the photoelectric sensor. .
[0018]
Furthermore, the distance between the mounting base plate and the sensor mounting plate in a state where the mounting base plate and the sensor mounting plate are in parallel adjusts the distance and the angle corresponding to the width in the mounting direction of the photoelectric sensor. It is characterized in that it is provided with a distance equal to or more than the sum of the strokes of the adjusting screw for the purpose.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiment described below exemplifies a photoelectric sensor fixture and a photoelectric sensor for embodying the technical idea of the present invention, and the present invention describes the photoelectric sensor fixture and the photoelectric sensor as follows. Not specific to anything.
[0022]
FIG. 1 is a block diagram showing a basic configuration of a transmissive photoelectric sensor. The sensor 1 detects the presence / absence of a detection target in the detection region, and the light projecting unit 11 having the light projecting unit 14 and the light receiving unit 12 having the light receiving unit 15 are separated with a space including the detection region interposed therebetween. The control unit 13 having the comparison output unit 16 is connected via a signal line.
The light projecting unit 14 projects light 17 onto the detection area, the light receiving unit 15 receives the light 17, and the comparison output unit 16 compares the amount of light received by the light receiving unit 15 with a predetermined threshold value. The comparison result is output.
[0023]
FIG. 2 is a perspective view of a transmissive photoelectric sensor which is an embodiment of the present invention corresponding to FIG. The same reference numerals as those in FIG. 1 are the same as those described with reference to FIG. 1, and thus the description thereof is omitted here.
The light projecting unit 11 includes a light projecting unit 14 and has a substantially rectangular parallelepiped casing 21 provided with a lens cover 19 on one surface for transmitting light 17, which is parallel light with a light projecting shape. Yes. The light projecting unit 11 is provided with through holes 11a and 11b having a substantially circular cross section that penetrate the inside of the unit and face two opposing surfaces. Similarly, the light receiving unit 12 has a built-in light receiving portion 15, a lens cover 20 is provided on one surface, and through holes 12a and 12b are provided.
[0024]
FIG. 3 is a perspective view showing a state in which the sensor 1 of FIG. 2 is attached to the installation surface via the fixture according to the first embodiment of the present invention.
The light projecting unit 11 and the light receiving unit 12 of the sensor 1 are installed on the installation surfaces 4 and 5 via the fixtures 2 and 3 so that the lens covers 19 and 20 face each other. Since the fixtures 2 and 3 are symmetrically shaped and are substantially the same, the corresponding parts are hereinafter referred to as the same name and number.
[0025]
The fixture 2 includes a substantially rectangular mounting base plate 30, a sensor mounting plate 40 that is substantially the same shape as the mounting base plate 30, and is disposed substantially parallel to the mounting base plate 30, and the mounting base plate 30. And one end of the sensor mounting plate 40 disposed opposite to the one end.
The other end of the sensor mounting plate 40 that is in contact with the connecting portion 50 is opposed to the one end described above, and extends outward from the sensor mounting plate 40 and substantially on the same plane, and is used for angle adjustment. A piece 41 is provided. The first protruding piece 41 is formed with a long hole 41 a extending in the direction of one end of the sensor mounting plate 40.
The other end portion of the mounting base plate 30 that contacts the connecting portion 50 is opposed to the above-described one end portion, and a first flat plate 31b that is perpendicular to the mounting base plate 30 and extends toward the sensor mounting plate 40, and the first flat plate 31b. A second protruding piece portion 31 formed in an L shape is provided, which is constituted by a second flat plate 31c that is spaced apart from the first protruding piece portion 41 and extends substantially in parallel from the front end portion of the flat plate 31b. This 2nd protrusion piece part 31 is used for angle adjustment in cooperation with the 1st protrusion piece part 41 arrange | positioned facing. The second flat plate 31c is formed with a hole 31a having a screw portion that is screwed with an adjusting screw 53 described later.
[0026]
The adjustment screw 53 includes a head portion 53a for contacting the sensor mounting plate 40 and a main body portion 53b having a male screw portion. The adjusting screw 53 passes through the hole 41a of the first projecting piece 41, the head 53a contacts the sensor mounting plate 40, and the male threaded portion of the main body 53b is screwed into the hole 31a of the second projecting piece 31. To do. The distance between the first protruding piece 41 and the second protruding piece 31 can be adjusted according to the tightening stroke of the adjusting screw 53. In other words, by adjusting the tightening stroke of the adjusting screw 53, the optical axis of the photoelectric sensor device with respect to the installation surface can be adjusted.
[0027]
The connection portion 50 is positioned so as not to interfere with the light 17 projected from the lens cover 19 of the light projecting unit 11, that is, with the opening 52 of the fixture 2 provided corresponding to the lens cover 19 interposed therebetween. It is comprised from a pair of leg part 50a, 50b provided in the both ends of the width direction, respectively.
Each leg part 50a, 50b has the deformation | transformation part 50c, 50d which can be elastically deformed in the connection part vicinity with the sensor attachment board 40. As shown in FIG. More specifically, when the mounting base plate 30 and the sensor mounting plate 40 are set in a substantially parallel state by adjusting the stroke of the adjusting screw 53, the leg portions 50a and 50b of the connecting portion 50 are elastically deformed in the compression direction. It is preferable that a force, that is, a restoring force in a direction in which the first projecting piece portion 41 and the second projecting piece portion 31 connected by the adjusting screw 53 are separated from each other is applied.
In the above-described embodiment, the mounting base plate 30 and the sensor mounting plate 40 are set so that the elastic deformation force in the compression direction is applied to the deforming portions 50c and 50d of the connecting portion 50 in the state where they are substantially parallel. Needless to say, the base plate 30 and the sensor mounting plate 40 may be set so that an elastic deformation force is not applied to the deformation portions 50c and 50d in a state where the base plate 30 and the sensor mounting plate 40 are substantially parallel.
[0028]
FIG. 4 is a side view of the fixture 2 as viewed from the side.
The mounting base plate 30 and the sensor mounting plate 40 are such that the distance D when they are parallel is a distance at which the light projecting unit 11 fixed to the sensor mounting plate 40 and the mounting base plate 30 do not interfere with each other so that the angle can be adjusted. That is, it is arranged to be equal to or more than the sum of the distance D1 equivalent to the thickness of the unit 11 and the maximum moving distance D2 of the angle adjustable range of the sensor mounting plate 40. Practically, from the viewpoint of suppressing the thickness of the entire fixture 2 as much as possible, it is preferable that the distance D1 and D2 described above plus a small dimension be the separation distance D and the thickness of the fixture 2. The maximum moving distance D2 described above includes the first protruding piece 41 provided on the sensor mounting plate 40 in the parallel state and the second flat plate 31c of the second protruding piece 31 provided on the mounting base plate 30. It is preferable that the distance D3 is set slightly larger than the distance D2 because of the difference between the distances D3 and the distances from the deformed portions 50c and 50d in the leg portions 50a and 50b of the connecting portion 50.
Moreover, in the 2nd protrusion piece part 31, the 1st flat plate 31b is for approaching the 2nd flat plate 31c to the sensor attachment plate 40 side, in order to store the unit 11 between the attachment base plate 30 and the sensor attachment plate 40. The distance closer to the first flat plate 31b is substantially equal to or more than the distance D1 equivalent to the thickness of the unit 11. Furthermore, the first flat plate 31b also has another purpose of preventing interference between the adjustment screw 53 and the installation surface 4. In this case, the distance D4 for bringing the second flat plate 31c closer to the first flat plate 31b is equal to the distance of the adjustment screw 53. It is equal to or longer than the distance corresponding to the maximum moving distance in the vertical direction accompanying the adjustment.
[0029]
Here, an example is shown in which the unit 11 is fixed to the mounting base plate 30 side of the sensor mounting plate 40, that is, a so-called lower surface, but it may be mounted on the upper surface facing the lower surface. In addition, it is conceivable that the sensor is attached only to the upper surface side of the sensor attachment plate 40. In this case, the above-described separation distance D does not need to include the thickness of the unit 11, and the angle adjustment range of the sensor attachment plate 40 is possible. Only the maximum movement distance D2 may be set in consideration. Further, in this case, the offset amount of the second flat plate 31c toward the sensor mounting plate 40 by the first flat plate 31b does not need to include the thickness of the unit 11, that is, the second flat plate 31c is substantially equal to the mounting base plate 30. May be provided on the same plane.
[0030]
FIG. 5 is a plan view of the fixture 2 as seen from the attachment base plate 30 side.
The sensor mounting plate 40 is provided with sensor mounting holes 40a, 40b, 40c, and 40d having a substantially circular cross section. Since the fixture 2 in this embodiment is a dual-purpose type to which both the light projecting unit 11 and the light receiving unit 12 can be attached, the sensor mounting holes 40a and 40b and the light receiving unit 12 for attaching the light projecting unit 11 are attached. Sensor mounting holes 40c and 40d are provided.
When mounting the light projecting unit 11 on the sensor mounting plate 40, the unit 11 inserts a bolt (not shown) into the sensor mounting holes 40a and 40b of the sensor mounting plate 40 through the through holes 11a and 11b provided in the unit body. The sensor mounting plate 40 is fixed with a nut (not shown) from the upper surface.
When mounting the unit, the mounting base plate 30 is positioned at positions corresponding to the sensor mounting holes 40a, 40b, 40c, and 40d in order to facilitate fixing work with a tool such as a screwdriver from the mounting base plate 30 side. Notches 30a, 30b, 30c and an opening 30d are provided.
[0031]
FIG. 6 is a plan view of the fixture 2 as seen from the sensor attachment plate 40 side. In the state where the unit 11 is attached to the fixture 2, the mounting base plate 30 is provided on the mounting base plate 30 so as to be fixed to the installation surface 4. Protruding pieces 32 and 33 extending outward from the outer contour of the sensor mounting plate 40 are provided. Mounting holes 32 a and 33 a for fixing the fixture 2 to the installation surface 4 are formed in the projecting pieces 32 and 33, and in particular, the mounting hole 33 a is located on the same plane with respect to the installation surface 4. In order to make it possible to adjust the optical axis by rotating the lens, the elongated hole shape is curved in the rotational radius direction with the substantially circular mounting hole 32a as the center of rotation.
[0032]
Next, the procedure for adjusting the optical axis will be described with reference to FIGS. 7A and 7B which are side views of FIG.
First, the light projecting unit 11 and the light receiving unit 12 are fixed to the fixtures 2 and 3, and then the fixtures 2 and 3 are fixed to the installation surfaces 4 and 5 with each unit being fixed. At the time of fixing to the installation surfaces 4 and 5, the horizontal optical axis adjustment may be performed on the installation surfaces 4 and 5, or during the vertical adjustment or after the adjustment.
A state where the fixtures 2 and 3 are fixed to the installation surfaces 4 and 5 is shown in FIG. In the state of FIG. 7A, the light 17 from the light projecting unit 11 is projected below the lens cover 20 of the light receiving unit 12, so that appropriate detection is impossible. In this case, by tightening the adjustment screw 53, that is, by moving the adjustment screw 53 downward by rotation, the adjustment screw 53 is pushed downward by the head 53a with which the sensor mounting plate 40 abuts. Thereby, the deformed portions 50c and 50d of the respective leg portions 50a and 50b are deformed, and the angle of the sensor mounting plate 40 with respect to the mounting base plate 30 is changed, so that the light 17 from the light projecting unit 11 moves upward, It matches the position of the lens cover 20 of the light receiving unit 12.
FIG. 7B is a side view showing a state where the optical axis adjustment of the unit in FIG. In FIG. 7B, the angle formed by the mounting base plate 30 and the sensor mounting plate 40 is adjusted by moving the adjustment screw 53 up and down, and the light 17 from the light projecting unit 11 is converted into the lens cover 20 of the light receiving unit 12. It is flooded towards. At this time, the first projecting piece 41 of the sensor mounting plate 40 may be sandwiched between the head 53a of the adjustment screw 53 and fixed by the nut 54 or the like. As a result, the semi-fixed state in which the first projecting piece 41 is in contact with the head 53a is fixed with the nut 54 or the like based on the restoring force of the deformed portions 50c and 50d of the legs 50a and 50b. Therefore, the optical axis perpendicular to the installation surfaces 4 and 5 is stabilized when a strong external force is input or in a vibration environment.
[0033]
In contrast to FIG. 7A, when the light 17 from the light projecting unit 11 is projected above the lens cover 20 of the light receiving unit 12, the adjustment screw 53 is loosened to light 17. May be moved downward and adjusted as shown in FIG. 7B.
[0034]
In FIG. 8, the side view of the fixture 6 which concerns on the 2nd Embodiment of this invention is shown. The light projecting unit 11 of the sensor 1 is installed on the installation surface 4 via the fixture 6. In addition, about the same thing as the fixture 2 of FIG. 3, the same name and the same number are attached | subjected, and description is abbreviate | omitted about them.
The attachment 6 is different from the attachment 2 of the first embodiment in the portion for adjusting the angle in cooperation with the adjustment screw 53, that is, the third protruding piece 42 and the fourth protruding piece 34. More specifically, in order to adjust the angle of the sensor mounting plate 40 with respect to the mounting base plate 30 directly with the adjusting screw 53 at the time of adjustment, the mounting tool 6 is used for fitting with the adjusting screw 53. A hole 42 a having a screw portion is formed in the third protruding piece portion connected to the sensor mounting plate 40.
Below, the detailed description of the fixture 6 is given.
[0035]
The fixture 6 includes a substantially rectangular mounting base plate 30, a sensor mounting plate 40 that is substantially the same shape as the mounting base plate 30, and is disposed substantially parallel to the mounting base plate 30, and the mounting base plate 30. And one end of the sensor mounting plate 40 disposed opposite to the one end.
The other end of the sensor mounting plate 40 that is in contact with the connecting portion 50 is opposed to the one end described above, and extends outward from the sensor mounting plate 40 and substantially on the same plane, and is used for angle adjustment. A piece 42 is provided. The third projecting piece portion 42 is formed with a hole 42 a having a screw portion for screwing with an adjustment screw 53 described later.
The other end of the mounting base plate 30 that is in contact with the connecting portion 50 is opposed to the one end described above, and extends outwardly from the mounting base plate 30 and substantially on the same plane, and is used for angle adjustment. A piece 34 is provided. The fourth projecting piece portion 34 is used for angle adjustment in cooperation with the third projecting piece portion 42 arranged to face.
[0036]
The adjustment screw 53 includes a front end portion 53c for coming into contact with the fourth projecting piece portion 34 of the mounting base plate 30 and a main body portion 53b having a male screw portion. In the adjustment screw 53, the male screw portion of the main body portion 53 b is screwed into the hole 42 a of the third protruding piece portion 42, and the tip portion 53 c comes into contact with the mounting base plate 30. The distance between the third protruding piece portion 42 and the fourth protruding piece portion 34 can be adjusted by the vertical movement of the third protruding piece portion 42 accompanying the rotation of the adjusting screw 53.
[0037]
Each leg part 50a, 50b of the connection part 50 has the deformation | transformation part 50c, 50d which can be elastically deformed in the vicinity of a connection part with the sensor attachment board 40. FIG. More specifically, when the mounting base plate 30 and the sensor mounting plate 40 are set in a substantially parallel state by adjusting the sensor mounting plate 40 with the adjusting screw 53, the leg portions 50a and 50b of the connecting portion 50 are extended. It is preferable that an elastic deformation force in the direction, that is, a restoring force in a direction in which the third protruding piece portion 42 and the fourth protruding piece portion 34 connected by the adjusting screw 53 are brought close to each other is applied.
[0038]
Next, the procedure for adjusting the optical axis will be described. The light projection unit 11 is fixed to the fixture 6, and then the fixture 6 is fixed to the installation surface 4 in a state where the light projection unit 11 is fixed.
When the light 17 from the light projecting unit 11 is projected above a desired region, the sensor mounting plate 40 is moved downward by tightening the adjustment screw 53, that is, by rotating the adjustment screw 53. Move. As a result, the deformed portions 50c and 50d of the connecting portion 50 are deformed, and the angle formed by the sensor mounting plate 40 with respect to the mounting base plate 30 is changed, whereby the light 17 from the light projecting unit 11 can be moved downward.
On the contrary, when the light 17 from the light projecting unit 11 is projected below the desired region, the light 17 from the light projecting unit 11 can be moved upward by loosening the adjustment screw 53.
That is, in the fixture 2, the adjustment screw 53 moves up and down, and the angle is adjusted accordingly. However, the fixture 6 does not move up and down and directly moves with the rotation of the adjustment screw 53. It is possible to adjust the angle by adjusting the sensor mounting plate 40, that is, to adjust the optical axis of the photoelectric sensor device. Therefore, since the adjustment screw 53 does not move up and down, the fourth projecting piece portion 34 of the fixture 6 has a second flat plate 31c such as the first flat plate 31b of the second projecting piece portion 31 of the fixture 2. Needless to say, it is not necessary to have a configuration for bringing the sensor closer to the sensor mounting plate 40 side.
[0039]
In addition, this invention is applicable not only to what the deformation | transformation parts 50c and 50d of the connection part 50 are comprised by the member which elastically deforms, but to the deformation | transformation parts 50c and 50d of the connection part 50 deform | transform or rotate. It is. Alternatively, a semi-fixed state by a restoring force of the elastic body may be realized by providing an elastic body such as a spring that separately connects the mounting base plate 30 and the sensor mounting plate 40.
Further, the mounting base plate 30, the sensor mounting plate 40 and the connection portion 50 of the fixture 2 are integrally formed. However, in the above embodiment, the unit 11 of the sensor 1 is The mounting base plate 30, the sensor mounting plate 40, and the connection portion 50 and the opening 52 are attached so as to fit in the space, but it is not necessary to be limited to this attachment method, and the unit 11 is a part of the unit 11. You may attach in the state protruded from the opening part 52. FIG. In this case, it goes without saying that the separation distance of the connecting portion 50 is a distance that does not interfere with the unit 11. Furthermore, in this case, in order to protect the unit 11 or to provide a hole for fixing the unit 11, the sensor mounting plate 40 is covered with the sensor mounting plate 40 on the same plane as the sensor mounting plate 40. A protrusion extending from 40 may be provided. In other words, the arrangement of the connecting portion 50 is not limited to the front of the lens cover 19 of the unit 11 and may be on the side of the unit 11. When the connecting portion 50 is disposed on the side of the unit 11, the deforming portions 50c and 50d of the connecting portion 50 are disposed on the same plane as the lens cover 19 or the light projecting / receiving center, so that the connecting portion 50 is disposed on the side. Since the portion arranged on the side is less moved up and down due to the angle adjustment, the angle adjustment becomes easy.
[0040]
In addition, the present invention is not limited to a transmission type photoelectric sensor that projects light on a detection area, receives transmitted light from the detection area, and detects information on a detection object in the detection area. The present invention can be similarly applied to a reflective photoelectric sensor that receives reflected light from a region and detects information related to a detection object in the detection region. The present invention can be applied not only to a light projecting unit and a light receiving unit, or to a separate photoelectric sensor in which the light projecting / receiving unit is separated from the control unit, but also to an integrated photoelectric sensor integrated into a unit.
[0041]
【The invention's effect】
As described above, the fixture for the photoelectric sensor and the photoelectric sensor device of the present invention can perform the work of attaching the sensor and the work of adjusting the optical axis separately, so that the optical axis can be easily adjusted even with one hand. There is an advantage that can be. Further, since the optical axis can be adjusted in the same mounting direction as the direct mounting on the installation surface and in the vertical direction, there is an advantage that the optical axis can be adjusted compactly.
[Brief description of the drawings]
FIG. 1 is a block diagram showing the basic configuration of a transmissive photoelectric sensor. FIG. 2 is a perspective view of a transmissive photoelectric sensor according to an embodiment of the present invention corresponding to FIG. 1. FIG. The perspective view which shows the state attached to the surface via the fixture which concerns on the 1st Embodiment of this invention. [FIG. 4] The side view which looked at the fixture 2 from the side. [FIG. FIG. 6 is a plan view of the fixture 2 as seen from the sensor mounting plate 40 side. FIG. 7A is a diagram of the fixtures 2 and 3 being fixed to the installation surfaces 4 and 5. FIG. Side view (before optical axis adjustment)
(B) Side view of the fixtures 2 and 3 fixed to the installation surfaces 4 and 5 (after adjusting the optical axis)
FIG. 8 is a perspective view of a fixture 6 according to a second embodiment of the present invention.
DESCRIPTION OF SYMBOLS 1 Photoelectric sensor 2, 3, 6 Attachment 4, 5 Installation surface 11 Light projection unit 12 Light reception unit 17 Light 30 Installation base board 31 2nd protrusion piece part 31a Hole 32, 33 Projection piece part 32a, 33a Installation attachment hole 40 Sensor Mounting plate 40a, 40b, 40c, 40d Sensor mounting hole 41 First protruding piece 41a hole 50 Connection portion 50a, 50b Leg portion 50c, 50d Deformation portion 52 Opening portion 53 Adjustment screw

Claims (6)

光電センサを設置面に取り付けるための光電センサ用取付具において、
前記設置面に取り付けるための取付部材を通すための設置取付孔を複数有する取付ベース板と、
前記取付ベース板と略平行で前記光電センサを取り付けるための取付部材を通すためのセンサ取付孔を有するセンサ取付板と、
前記取付ベース板と前記センサ取付板とのなす角度を変えるための変形部を有し、前記取付ベース板と前記センサ取付板とを所定の距離離間して一体的に連結する接続部と、
前記センサ取付板から延出して設けられ、前記角度を変えるための第1突出部と、
前記取付ベース板から延出して設けられ、前記第1突出部と平行な面を有し、前記第1突出部と協働して前記角度を変えるための第2突出部と、
前記第1突出部または前記第2突出部のいずれか一方に形成されたネジ部を有する孔に螺合すると共に他方に直接的または間接的に当接し、操作されることで前記第1突出部と前記第2突出部との距離を変更し、当該距離の変更に基づいて前記接続部の変形部を変形させながら前記角度を調整する調整ネジと、
を備えることを特徴とする光電センサ用取付具。
In the photoelectric sensor fixture for attaching the photoelectric sensor to the installation surface,
An attachment base plate having a plurality of installation attachment holes for passing attachment members for attachment to the installation surface;
A sensor mounting plate having a sensor mounting hole for passing a mounting member for mounting the photoelectric sensor substantially parallel to the mounting base plate;
A connecting portion having a deforming portion for changing an angle formed by the mounting base plate and the sensor mounting plate, and integrally connecting the mounting base plate and the sensor mounting plate at a predetermined distance;
A first protrusion for extending from the sensor mounting plate and changing the angle;
A second protrusion for extending from the mounting base plate, having a surface parallel to the first protrusion, and for changing the angle in cooperation with the first protrusion;
The first projecting portion can be screwed into a hole having a threaded portion formed on one of the first projecting portion and the second projecting portion, and can be directly or indirectly brought into contact with the other and operated. And an adjustment screw that adjusts the angle while changing the deformation portion of the connection portion based on the change in the distance,
A fixture for a photoelectric sensor, comprising:
前記接続部の変形部は、前記調整ネジでの調整により弾性変形をし、前記取付ベース板と前記センサ取付板とを介して該弾性変形により生じる復元力と前記調整ネジにより、前記取付ベース板と前記センサ取付板とを前記角度に固定することを特徴とする請求項に記載の光電センサ用取付具。The deforming portion of the connecting portion is elastically deformed by adjustment with the adjusting screw, and the mounting base plate is restored by the restoring force generated by the elastic deformation via the mounting base plate and the sensor mounting plate and the adjusting screw. The fixture for a photoelectric sensor according to claim 1 , wherein the sensor mounting plate and the sensor mounting plate are fixed at the angle. 前記取付ベース板に設けられる前記第2突出部が、前記取付ベース板から垂直かつ前記センサ取付板側に延びる第1平板と、該第1平板の先端から前記第1突出部に対して離間し略平行に延びる第2平板とからなるL字形をしてなり、前記調整ネジが螺合する前記孔が、前記第2平板上に形成されていることを特徴とする請求項に記載の光電センサ用取付具。The second projecting portion provided on the mounting base plate is spaced apart from the first projecting portion from a first flat plate extending from the mounting base plate and extending toward the sensor mounting plate, and from the tip of the first flat plate. becomes approximately an L-shape and a second flat plate extending in parallel, the hole into which the adjusting screw is screwed, the photoelectric according to claim 2, characterized in that it is formed on the second flat plate Sensor fixture. 前記調整ネジと螺合するための前記孔が、前記センサ取付板の前記第1突出部に形成され、前記調整ネジの先端部が取付ベース板の第2突出部を押圧することを特徴とする請求項1または2に記載の光電センサ用取付具。The hole for screwing with the adjusting screw is formed in the first projecting portion of the sensor mounting plate, and the tip of the adjusting screw presses the second projecting portion of the mounting base plate. The fixture for photoelectric sensors of Claim 1 or 2 . 前記取付ベース板と前記センサ取付板が略矩形をなし、前記接続部が前記取付ベース板と前記センサ取付板との一端でかつ前記取付ベース板と前記センサ取付板とに水平方向の各両端に接する脚部で構成され、
前記光電センサ用取付具は、さらに前記光電センサが投受光する光を透過するための、前記取付ベース板と前記センサ取付板と前記各脚部とで囲まれる開口部を有することを特徴とする請求項1至及に記載の光電センサ用取付具。
The mounting base plate and the sensor mounting plate have a substantially rectangular shape, the connecting portion is one end of the mounting base plate and the sensor mounting plate, and the both ends of the mounting base plate and the sensor mounting plate in the horizontal direction. Consists of legs that touch,
The photoelectric sensor fixture further includes an opening surrounded by the attachment base plate, the sensor attachment plate, and the legs for transmitting light projected and received by the photoelectric sensor. photoelectric sensor fixture of claim 1 Itari及4.
前記取付ベース板と前記センサ取付板とが平行状態での前記取付ベース板と前記センサ取付板との離間距離が、前記光電センサの取付方向の幅に相当する距離と前記角度を調整するための前記調整ネジのストロークとの和の距離と同等もしくはそれ以上設けられていることを特徴とする請求項1至及に記載の光電センサ用取付具。The distance between the mounting base plate and the sensor mounting plate in a state where the mounting base plate and the sensor mounting plate are in parallel with each other is for adjusting the distance and the angle corresponding to the width in the mounting direction of the photoelectric sensor. The photoelectric sensor fixture according to any one of claims 1 to 5 , wherein the fixture is provided with a distance equal to or longer than a sum of a stroke of the adjusting screw.
JP2003128272A 2003-05-06 2003-05-06 Photoelectric sensor fixture and photoelectric sensor device Expired - Lifetime JP4283032B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106289343A (en) * 2015-06-04 2017-01-04 京元电子股份有限公司 Sensor adjusting apparatus

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JP2012108079A (en) * 2010-11-19 2012-06-07 Yamatake Corp Photoelectronic sensor
CN104677403A (en) * 2013-11-28 2015-06-03 宁夏巨能机器人***有限公司 Sensor bracket for detecting positioning precision

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106289343A (en) * 2015-06-04 2017-01-04 京元电子股份有限公司 Sensor adjusting apparatus

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