JP2514552Y2 - Photoelectric sensor - Google Patents
Photoelectric sensorInfo
- Publication number
- JP2514552Y2 JP2514552Y2 JP1989042445U JP4244589U JP2514552Y2 JP 2514552 Y2 JP2514552 Y2 JP 2514552Y2 JP 1989042445 U JP1989042445 U JP 1989042445U JP 4244589 U JP4244589 U JP 4244589U JP 2514552 Y2 JP2514552 Y2 JP 2514552Y2
- Authority
- JP
- Japan
- Prior art keywords
- light
- case
- groove
- light receiving
- total reflection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Description
【考案の詳細な説明】 〈産業上の利用分野〉 この考案は、投光部と受光部とが溝を隔てて対向配置
された溝型構造の光電センサに関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a photoelectric sensor having a groove-type structure in which a light projecting portion and a light receiving portion are arranged to face each other with a groove therebetween.
〈従来の技術〉 第７図は、従来のこの種光電センサの一例を示してお
り、ケース体１に溝２を隔てて一対の突出部3,4が一体
に形成してある。各突出部3,4の先端部には投光部５お
よび受光部６が対向して設けられ、これら投光部５およ
び受光部６とケース体１内に組み込まれた投光器７およ
び受光器８との間を光学系により光学的に結合してあ
る。<Prior Art> FIG. 7 shows an example of a conventional photoelectric sensor of this type, in which a pair of protrusions 3 and 4 are integrally formed on a case body 1 with a groove 2 therebetween. A light projecting portion 5 and a light receiving portion 6 are provided at the tips of the projecting portions 3 and 4 so as to face each other, and the light projecting portion 5 and the light receiving portion 6 and the light projector 7 and the light receiver 8 incorporated in the case body 1 are provided. And are optically coupled by an optical system.
この光電センサにおいて、投光部５を発した光は溝２
を横切って受光部６で受光されるが、もし溝２中の光路
が遮蔽物により遮断されると、投光部５からの光は受光
部６に到らない。このため受光部６では遮蔽物の有無に
応じてオン、オフする受光信号を得ることができる。In this photoelectric sensor, the light emitted from the light projecting unit 5 is generated by the groove 2
However, if the optical path in the groove 2 is blocked by a shield, the light from the light projecting unit 5 does not reach the light receiving unit 6. Therefore, the light receiving unit 6 can obtain a light receiving signal that turns on and off depending on the presence or absence of the shield.
〈考案が解決しようとする問題点〉 このような光電センサを用いて、例えば透明シート上
のマークを検出するような場合、もしシート端に対する
マークの位置が前記溝２の溝深さｌよりも小さければ問
題ないが、もし溝深さｌより大きいと、マークの位置は
投光部５と受光部６とを結ぶ光路の外側に外れてしまう
ため、マーク検出は困難となり、この光電センサの使用
は不可能となる。このためメーカ側では、溝深さｌの異
なる複数種の光電センサを製作する必要があり、このた
め製品の種類が増し、製品管理が煩雑となるなどの問題
がある。<Problems to be Solved by the Invention> When such a photoelectric sensor is used to detect a mark on a transparent sheet, for example, if the position of the mark with respect to the edge of the sheet is greater than the groove depth 1 of the groove 2. If it is smaller, there is no problem, but if it is larger than the groove depth l, the position of the mark deviates to the outside of the optical path connecting the light projecting portion 5 and the light receiving portion 6, so that it becomes difficult to detect the mark, and this photoelectric sensor is used Becomes impossible. Therefore, it is necessary for the manufacturer to manufacture a plurality of types of photoelectric sensors having different groove depths l, which increases the number of types of products and complicates product management.
この考案は、上記問題に着目してなされたもので、投
光部と受光部との間の溝の溝深さを調整可能となすこと
により、単一種で広範囲の用途に適用できる光電センサ
を提供することを目的とする。This invention has been made in view of the above problems, and a photoelectric sensor that can be applied to a wide range of applications by a single type by adjusting the groove depth of the groove between the light projecting portion and the light receiving portion. The purpose is to provide.
〈問題点を解決するための手段〉 この考案の光電センサは、ケースに、導光体が投光器
および受光器の光軸方向へ移動可能に設けられたもので
ある。前記導光体には、投光器からの光を反射させる反
射面を有する投光部と、前記投光部での反射光を反射さ
せて受光器へ導く反射面を有する受光部とが溝を隔てて
対向した状態で形成されている。前記投光部および受光
部とケースとの間には、投光部および受光部を前記光軸
方向へ移動させてそれぞれの反射面の高さを位置調整す
ることにより、前記溝の深さを可変となす調整機構を介
在させている。<Means for Solving the Problems> In the photoelectric sensor of the present invention, a light guide is provided in a case so as to be movable in the optical axis directions of the light projector and the light receiver. In the light guide, a light projecting portion having a reflecting surface that reflects light from the light projector and a light receiving portion having a reflecting surface that reflects the reflected light from the light projecting portion and guides it to the light receiver separates the groove. Are formed to face each other. The depth of the groove is adjusted by moving the light projecting unit and the light receiving unit in the optical axis direction between the light projecting unit and the light receiving unit and the case to adjust the height of each reflecting surface. A variable adjustment mechanism is interposed.
〈作用〉 投光部および受光部の各反射面の高さを位置調整すれ
ば、検出対象の位置に応じて溝深さを可変設定できる。
このとき、投光部の反射面および受光部の反射面の位置
が変わるだけで、投光器および受光器の位置は固定され
ている。<Operation> By adjusting the heights of the reflecting surfaces of the light projecting portion and the light receiving portion, the groove depth can be variably set according to the position of the detection target.
At this time, the positions of the projector and the light receiver are fixed only by changing the positions of the reflecting surface of the light projecting portion and the reflecting surface of the light receiving portion.
〈実施例〉 第１図〜第３図は、この考案の一実施例にかかる溝型
の光電センサを示すもので、ケース10の両側に溝11を隔
てて一対の導光体12,13が取付け固定されている。<Embodiment> FIGS. 1 to 3 show a groove type photoelectric sensor according to an embodiment of the present invention, in which a pair of light guides 12 and 13 are provided on both sides of a case 10 with a groove 11 therebetween. Installed and fixed.
前記ケース10は、ABS樹脂などの合成樹脂製であっ
て、第４図および第５図に示すような構造の一対のケー
ス半体10A,10Bを、その開口面を突き合わせてその適所
を超音波ウェルダにより一体化したものである。なお同
図には示していないが、各ケース半体10A,10Bの突合わ
せ端面には突条が設けてあり、これにより超音波ウェル
ダによるケース半体10A,10Bの接合を確実かつ容易なも
のとなしている。The case 10 is made of a synthetic resin such as ABS resin, and a pair of case halves 10A and 10B having a structure as shown in FIGS. It is integrated by a welder. Although not shown in the figure, a protrusion is provided on the abutting end surface of each of the case halves 10A, 10B, which ensures reliable and easy joining of the case halves 10A, 10B by the ultrasonic welder. Is said.
各ケース半体10A,10Bは、溝11を挟んで両側に支持部1
4,15を備え、各支持部14,15に前記導光体12,13の軸部16
が嵌まる凹部17,18を形成している。Each of the case halves 10A and 10B has a support part 1 on both sides with a groove 11 in between.
4, 15 and each supporting portion 14, 15 has a shaft portion 16 of the light guide body 12, 13.
To form recesses 17 and 18 in which
各導光体12,13は、アクリルなどの透明の合成樹脂材
により形成され、頭部19と軸部16とを段部20を介して一
体に形成したものである。Each of the light guides 12 and 13 is made of a transparent synthetic resin material such as acrylic and has a head portion 19 and a shaft portion 16 integrally formed via a step portion 20.
一方の導光体12における頭部19は、その内面より溝11
の方向へ光を投光するための投光部21を構成し、また他
方の導光体13における頭部19は、その内面より投光部21
からの光を受光するための受光部22を構成している。各
導光体12,13の頭部19は、その内部に先端面が開口する
空洞部23を備え、その空洞部23の底面を斜めに形成して
全反射面24となしている。前記空洞部23の開口面には導
光体12,13と同材質のキャップ25が被せてあり、前記全
反射面24に水滴などが付着して反射特性が低下するのを
防止している。The head 19 of one light guide 12 has a groove 11 from its inner surface.
Of the light guide 13 and the head 19 of the other light guide 13 has a light projecting part 21 from its inner surface.
A light receiving section 22 for receiving the light from is formed. The head portion 19 of each of the light guides 12 and 13 is provided with a cavity portion 23 having an open front end surface therein, and the bottom surface of the cavity portion 23 is formed obliquely to form a total reflection surface 24. A cap 25 made of the same material as that of the light guides 12 and 13 is covered on the opening surface of the hollow portion 23 to prevent a drop of water or the like from adhering to the total reflection surface 24 to deteriorate the reflection characteristic.
各導光体12,13の軸部16は、その内部にファイバ挿入
穴26を備え、このファイバ挿入穴26の底面にさらに接続
穴27が一連に形成してある。前記ファイバ挿入穴26は光
ファイバ28,29を挿入するためのもので、光ファイバ28,
29の先端部よりコア30を露出させ、そのコア30の先端を
接続穴27に挿入して導光体12,13と光学的に結合すると
ともに、ファイバ挿入穴26内のコア30の周囲にエポキシ
樹脂31を充填して光ファイバ28,29を固定している。The shaft portion 16 of each of the light guides 12 and 13 has a fiber insertion hole 26 inside thereof, and a connection hole 27 is further formed in series on the bottom surface of the fiber insertion hole 26. The fiber insertion hole 26 is for inserting the optical fibers 28, 29, the optical fiber 28,
The core 30 is exposed from the tip of 29, the tip of the core 30 is inserted into the connection hole 27 to optically couple with the light guides 12 and 13, and the epoxy is applied around the core 30 in the fiber insertion hole 26. A resin 31 is filled to fix the optical fibers 28 and 29.
一方の光ファイバ28は、発光ダイオードなどの投光器
32からの光を導光体12の投光部21へ導き、また他方の光
ファイバ29は、導光体13の受光部22からの光をフォトト
ランジスタなどの受光器33へ導くためのものである。各
光ファイバ28,29は、固定具34によりケース10に固定し
て、抜けが阻止されている。One optical fiber 28 is a light emitter such as a light emitting diode.
The light from 32 is guided to the light projecting section 21 of the light guide body 12, and the other optical fiber 29 is for guiding the light from the light receiving section 22 of the light guide body 13 to the light receiver 33 such as a phototransistor. is there. Each optical fiber 28, 29 is fixed to the case 10 by a fixture 34 to prevent the optical fiber from coming off.
前記導光体12,13は、その軸部16がケース半体10A,10B
の支持部14,14間および15,15間に支持され、それぞれの
頭部19は支持部14,15の先端面より同じ長さだけ突出し
て投光部21と受光部22とが対向する。この実施例の場
合、ケース10に導光体12,13を組み込む際に前記の突出
長さを３段階に設定して、ケース10の溝底に対する投光
部21の全反射面24および受光部22の全反射面24の高さを
選択できるよう構成してあり、第１図および第２図に示
す例では、軸部16をケース10に最も深く挿入させて、ケ
ース10の溝底に対する投光部21の全反射面24および受光
部22の全反射面24の位置を最も低くした状態、すなわち
溝11の溝深さｌが最も浅い状態に各導光体12,13をケー
ス10に固定してある。The shaft portions 16 of the light guides 12 and 13 are case halves 10A and 10B.
Are supported between the support portions 14 and 14 and between the support portions 15 and 15, and the head portions 19 of the respective support portions 14 and 15 project from the tip surfaces of the support portions 14 and 15 by the same length, and the light projecting portion 21 and the light receiving portion 22 face each other. In the case of this embodiment, when the light guides 12 and 13 are assembled in the case 10, the projecting lengths are set in three stages, and the total reflection surface 24 of the light projecting portion 21 and the light receiving portion with respect to the groove bottom of the case 10 are set. The height of the total reflection surface 24 of 22 is selectable, and in the example shown in FIGS. 1 and 2, the shaft portion 16 is inserted into the case 10 most deeply and thrown into the groove bottom of the case 10. The light guides 12 and 13 are fixed to the case 10 in a state where the positions of the total reflection surface 24 of the light section 21 and the total reflection surface 24 of the light receiving section 22 are the lowest, that is, the groove depth l of the groove 11 is the shallowest. I am doing it.
各導光体12,13の軸部16とケース10との間には、第４
図〜第６図に示すような、ケース10の溝底に対する投光
部21の全反射面24および受光部22の全反射面24の高さを
調整して溝11の溝深さｌを可変となすための調整機構35
が設けられている。Between the shaft portion 16 of each light guide 12, 13 and the case 10, a fourth
As shown in FIGS. 6 to 6, the heights of the total reflection surface 24 of the light projecting portion 21 and the total reflection surface 24 of the light receiving portion 22 with respect to the groove bottom of the case 10 are adjusted to change the groove depth l of the groove 11. Adjusting mechanism 35
Is provided.
この調整機構35は、各導光体12,13の軸部16に所定間
隔に形成された複数個（図示例では３個）の係合溝36〜
38と、各ケース半体10A,10Bにおける支持部14,15の各凹
部17,18に設けられた複数個（図示例では２個）の突起3
9,40とで構成され、ケース10の溝底に対する投光部21の
全反射面24および受光部22の全反射面24の高さに応じて
各突起39,40に対する係合溝36〜38の係合位置を変更で
きるようにしてある。The adjusting mechanism 35 includes a plurality of (three in the illustrated example) engagement grooves 36 formed in the shaft portion 16 of each light guide 12, 13 at predetermined intervals.
38, and a plurality of protrusions 3 (two in the illustrated example) provided in the recesses 17 and 18 of the support portions 14 and 15 of the case halves 10A and 10B, respectively.
9, 40 and engaging grooves 36 to 38 for the respective projections 39, 40 according to the heights of the total reflection surface 24 of the light projecting portion 21 and the total reflection surface 24 of the light receiving portion 22 with respect to the groove bottom of the case 10. The engaging position of is changeable.
図示例の場合、２個の突起39,40が頭部19に近い側の
２個の係合溝36,37にそれぞれ係合した状態で各導光体1
2,13をケース10に組み込むとき、ケース10の溝底に対す
る投光部21の全反射面24および受光部22の全反射面24の
位置が最も低くなって、最も浅い溝深さｌ＝l1の状態と
なり、また２個の突起39,40が頭部19に遠い側の２個の
係合溝37,38にそれぞれ係合した状態で各導光体12,13を
ケース10に組み込むとき、ケース10の溝底に対する投光
部21の全反射面24および受光部22の全反射面24の位置が
所定量だけ高くなって、中間の溝深さｌ＝l2（ただしl2
＞l1）の状態となり、さらに１個の突起39が頭部19に最
も遠い１個の係合溝38に係合した状態で各導光体12,13
をケース10に組み込むとき、ケース10の溝底に対する投
光部21の全反射面24および受光部22の全反射面24の位置
が最も高くなって、最も深い溝深さｌ＝l3（ただしl3＞
l2＞l1）の状態となる。In the case of the illustrated example, each of the light guides 1 is in a state in which the two protrusions 39 and 40 are engaged with the two engagement grooves 36 and 37 on the side close to the head 19.
When 2, 13 are assembled in the case 10, the positions of the total reflection surface 24 of the light projecting portion 21 and the total reflection surface 24 of the light receiving portion 22 with respect to the groove bottom of the case 10 are the lowest, and the shallowest groove depth l = 1 When the light guides 12, 13 are assembled in the case 10 in the state of 1 and the two projections 39, 40 are engaged with the two engagement grooves 37, 38 on the side far from the head 19, respectively. , The positions of the total reflection surface 24 of the light projecting portion 21 and the total reflection surface 24 of the light receiving portion 22 with respect to the groove bottom of the case 10 are increased by a predetermined amount, and the intermediate groove depth l = l 2 (where l 2
> L 1 ) and one protrusion 39 is engaged with one engaging groove 38 farthest from the head 19, each light guide 12, 13
When assembling into the case 10, the positions of the total reflection surface 24 of the light projecting portion 21 and the total reflection surface 24 of the light receiving portion 22 relative to the groove bottom of the case 10 are the highest, and the deepest groove depth l = l 3 (however, l 3 ＞
l 2 > l 1 ).
各突起39,40には、その上面中央に小突起41が一体に
設けてあり、組立に際して係合溝36〜38にいずれか突起
39,40を係合させて各導光体12,13を各ケース半体10A,10
B間に保持した後、各突起部分に超音波ウェルダを施す
とき、各小突起41が溶融して導光体12,13とケース半体1
0A,10Bとを溶着させる。A small protrusion 41 is integrally provided at the center of the upper surface of each of the protrusions 39 and 40, and any one of the protrusions is formed in the engaging grooves 36 to 38 during assembly.
39, 40 are engaged with each other so that each light guide 12, 13 is connected to each case half 10A, 10
After holding between B, when applying ultrasonic welding to each protrusion, each small protrusion 41 melts and the light guides 12 and 13 and the case half 1
Weld with 0A and 10B.
かくして上記構成の光電センサを用いて、例えば透明
シート上のマークを検出するような場合、シート端に対
するマーク位置に応じて前記溝11の溝深さｌを調整する
ことになる。この場合にマーク位置が溝深さl1以下であ
れば、各導光体12,13を、ケース10の溝底に対する投光
部21の全反射面24および受光部22の全反射面24の位置が
最も低くなるよう調節機構35により位置決めしてケース
半体10A,10Bに組み込む。またマーク位置が溝深さl1よ
り大きくl2以下であれば、各導光体12,13を、ケース10
の溝底に対する投光部21の全反射面24および受光部22の
全反射面24の位置が中間の高さになるよう調節機構35に
より位置決めしてケース半体10A,10Bに組み込む。さら
にマーク位置が溝深さl2より大きくl3以下であれば、各
導光体12,13を、ケース10の溝底に対する投光部21の全
反射面24および受光部22の全反射面24の位置が最も高く
なるよう調節機構35により位置決めしてケース半体10A,
10Bに組み込む。Thus, when the mark on the transparent sheet is detected by using the photoelectric sensor having the above-mentioned structure, the groove depth 1 of the groove 11 is adjusted according to the mark position with respect to the sheet edge. In this case, if the mark position is the groove depth l 1 or less, the light guides 12 and 13 of the total reflection surface 24 of the light projecting portion 21 and the total reflection surface 24 of the light receiving portion 22 to the groove bottom of the case 10 are It is positioned by the adjusting mechanism 35 so that the position is the lowest, and is incorporated in the case halves 10A, 10B. If the mark position is greater than the groove depth l 1 and less than l 2 , the light guides 12 and 13 should be attached to the case 10.
The position of the total reflection surface 24 of the light projecting portion 21 and the position of the total reflection surface 24 of the light receiving portion 22 with respect to the groove bottom are positioned by the adjusting mechanism 35 and incorporated in the case halves 10A, 10B. Further, if the mark position is greater than the groove depth l 2 and less than or equal to l 3 , the light guides 12 and 13 are moved to the groove bottom of the case 10 by the total reflection surface 24 of the light projecting portion 21 and the total reflection surface of the light receiving portion 22. Position the case half by adjusting mechanism 35 so that the position of 24 is the highest
Install in 10B.
このようにして各導光体12,13を投光器32および受光
器33の光軸方向へ移動させてケース10から突出長さを調
節すれば、溝底に対する投光部21の全反射面24および受
光部22の全反射面24の高さが変わるため、検出対象の位
置に応じて溝深さｌを可変設定でき、単一種の光電セン
サをもって広範囲の用途に適用できることになる。In this way, by moving each light guide 12, 13 in the optical axis direction of the light projector 32 and the light receiver 33 to adjust the protruding length from the case 10, the total reflection surface 24 of the light projecting portion 21 to the groove bottom and Since the height of the total reflection surface 24 of the light receiving section 22 changes, the groove depth 1 can be variably set according to the position of the detection target, and a single type of photoelectric sensor can be applied to a wide range of applications.
なお上記実施例では、溝深さｌを３段階に設定可能と
しているが、２段階または４段階以上に設定するように
してもよく、さらには段階的ではなく、連続的に可変設
定できるようにしてもよい。In the above embodiment, the groove depth 1 can be set in three steps, but it may be set in two steps or four steps or more, and further, it is possible to set continuously variable instead of stepwise. May be.
〈考案の効果〉 この考案は上記の如く、投光部と受光部との間の溝の
溝深さを検出対象に応じて可変設定できるようにしたか
ら、単一種の光電センサをもって広範囲の用途に適用で
き、メーカ側では溝深さが異なる多種類の光電センサを
製作するなどの必要はない。このため製品の種類は少な
くて済み、製品管理が容易となる。<Effect of Device> As described above, the device of the present invention allows the groove depth between the light emitting unit and the light receiving unit to be variably set according to the object to be detected. It is not necessary for the manufacturer to manufacture various types of photoelectric sensors having different groove depths. Therefore, the number of types of products is small and product management is easy.
また、投光部の反射面および受光部の反射面の高さを
位置調整することにより投光部と受光部との間の溝の深
さを変えるから、投光器および受光器の位置を固定で
き、投光器および受光器に繋がる結線部分に余裕をもた
せる必要がなく、製造コストが安価となる。Also, by adjusting the height of the reflecting surface of the light emitting unit and the height of the reflecting surface of the light receiving unit, the depth of the groove between the light emitting unit and the light receiving unit is changed, so the positions of the light emitting unit and the light receiving unit can be fixed. Since it is not necessary to provide a margin for the connecting portion connected to the light projector and the light receiver, the manufacturing cost becomes low.
さらに、前記結線部分は完全固定できるので、振動や
衝撃に強い光電センサを実現できるなど、顕著な効果を
奏する。Further, since the connection portion can be completely fixed, a remarkable effect such as a photoelectric sensor resistant to vibration and shock can be realized.
第１図はこの考案の一実施例にかかる光電センサの平面
図、第２図はその一部を破断した平面図、第３図は溝深
さを大きく設定した状態を示す光電センサの斜面図、第
４図はケース半体の内側より見た平面図、第５図は第４
図V-V線に沿う断面図、第６図は導光体の外観を示す斜
面図、第７図は従来例を示す斜面図である。 10……ケース、11……溝、12,13……導光体 21……投光部、22……受光部、35……調節機構 36〜38……係合溝、39,40……突起FIG. 1 is a plan view of a photoelectric sensor according to an embodiment of the present invention, FIG. 2 is a partially cutaway plan view, and FIG. 3 is a perspective view of the photoelectric sensor showing a state in which the groove depth is set large. , FIG. 4 is a plan view seen from the inside of the case half, and FIG.
FIG. 6 is a sectional view taken along line VV in FIG. 6, FIG. 6 is a perspective view showing the appearance of the light guide, and FIG. 7 is a perspective view showing a conventional example. 10 …… Case, 11 …… Groove, 12,13 …… Light guide 21 …… Emitting part, 22 …… Light receiving part, 35 …… Adjustment mechanism 36 to 38 …… Engaging groove, 39,40 …… Protrusion
Claims (1)
光軸方向へ移動可能に設けられ、 前記導光体には、投光器からの光を反射させる反射面を
有する投光部と、前記投光部での反射光を反射させて受
光器へ導く反射面を有する受光部とが溝を隔てて対向し
た状態で形成されており、 前記投光部および受光部とケースとの間には、投光部お
よび受光部を前記光軸方向へ移動させてそれぞれの反射
面の高さを位置調整することにより、前記溝の深さを可
変となす調整機構を介在させて成る光電センサ。1. A case is provided with a light guide movably in an optical axis direction of a light projector and a light receiver, and the light guide has a light projecting portion having a reflecting surface for reflecting light from the light projector, A light receiving portion having a reflecting surface that reflects the light reflected by the light projecting portion and guides it to a light receiver is formed in a state of being opposed to each other across a groove, and between the light projecting portion and the light receiving portion and the case. Is a photoelectric sensor including an adjusting mechanism for varying the depth of the groove by moving the light projecting unit and the light receiving unit in the optical axis direction to adjust the heights of the respective reflecting surfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989042445U JP2514552Y2 (en) | 1989-04-11 | 1989-04-11 | Photoelectric sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989042445U JP2514552Y2 (en) | 1989-04-11 | 1989-04-11 | Photoelectric sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02133845U JPH02133845U (en) | 1990-11-07 |
| JP2514552Y2 true JP2514552Y2 (en) | 1996-10-23 |
Family
ID=31553998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989042445U Expired - Lifetime JP2514552Y2 (en) | 1989-04-11 | 1989-04-11 | Photoelectric sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2514552Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4704816B2 (en) * | 2005-06-29 | 2011-06-22 | 株式会社ディスコ | Cutting equipment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS514039U (en) * | 1974-06-26 | 1976-01-13 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62175639U (en) * | 1986-04-28 | 1987-11-07 |
-
1989
- 1989-04-11 JP JP1989042445U patent/JP2514552Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS514039U (en) * | 1974-06-26 | 1976-01-13 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02133845U (en) | 1990-11-07 |
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