JPH0528458B2 - - Google Patents
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- Publication number
- JPH0528458B2 JPH0528458B2 JP19975286A JP19975286A JPH0528458B2 JP H0528458 B2 JPH0528458 B2 JP H0528458B2 JP 19975286 A JP19975286 A JP 19975286A JP 19975286 A JP19975286 A JP 19975286A JP H0528458 B2 JPH0528458 B2 JP H0528458B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- optical system
- photoelectric switch
- reflective photoelectric
- amount
- 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
Links
- 230000003287 optical effect Effects 0.000 claims description 28
- 238000001514 detection method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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- Electronic Switches (AREA)
- Switches Operated By Changes In Physical Conditions (AREA)
Description
【発明の詳細な説明】 〔技術分野〕 この発明は反射型光電スイツチに関する。[Detailed description of the invention] 〔Technical field〕 This invention relates to a reflective photoelectric switch.
反射型光電スイツチのなかに、スイツチからみ
た位置が所定内の距離範囲（検知可能領域）にあ
るときのみ被検知物体の検知がなされる、いわゆ
る領域反射型の光電スイツチがある。通常、この
光電スイツチは、検知可能領域を遠近させるため
の調節手段を備えている。
Among the reflection type photoelectric switches, there is a so-called area reflection type photoelectric switch, which detects an object only when the position viewed from the switch is within a predetermined distance range (detectable area). Usually, this photoelectric switch is equipped with adjustment means for making the detectable area more or less distant.
遠近させるために用いられる方法には、例え
ば、受光用光学系におけるレンズを移動させる方
法がある。動すと、受光用光学系による光路が移
動して、投光用光学系と交差する位置が変わるの
で、検知可能領域が遠近することとなるのであ
る。 An example of a method used for making the object nearer or nearer is a method of moving a lens in a light-receiving optical system. When the sensor is moved, the optical path of the light-receiving optical system moves and the position where it intersects with the light-emitting optical system changes, so the detectable area becomes closer or farther away.
しかしながら、従来、受光用レンズを動かすた
めになされる駆動量が同じ量であつても、検知可
能領域がスイツチから遠いところにある場合と近
いところにある場合とでは、検知可能領域の移動
量が違つていた。つまり、同じ駆動量に対して、
スイツチに近いところでは移動量が少なく、遠い
ところでは移動量が多いのである。したがつて、
検知可能領域の移動させる距離が決まつても、調
節手段の駆動量をどれだけおこなうことにすれば
よいのかが、検知可能領域のある個所によつて異
なることになるので、検知可能領域の設定や変更
が迅速におこなえないという不便さがあつた。 However, conventionally, even if the amount of drive to move the light receiving lens is the same, the amount of movement of the detectable area differs depending on whether the detectable area is far from the switch or close to the switch. It was different. In other words, for the same amount of drive,
The amount of movement is small in places close to the switch, and the amount of movement is large in places far away. Therefore,
Even if the distance to which the detectable area is to be moved is determined, the amount by which the adjustment means should be driven will differ depending on the location of the detectable area, so it is difficult to set the detectable area. There was an inconvenience that changes could not be made quickly.
上記の事情に鑑み、この発明は、検知可能領域
の設定・変更を迅速容易におこなえるような反射
型光電スイツチを提供することを目的とする。
In view of the above circumstances, an object of the present invention is to provide a reflective photoelectric switch that allows the detection area to be set and changed quickly and easily.
前記目的を達成するため、この発明は、投光用
光学系および発光素子を備えていて、この投光用
光学系により発光素子の光を検知可能領域に投光
するとともに、受光用光学系および受光素子を備
えていて、前記検知可能領域に存在する被検知物
体で反射された光を前記受光用光学系により受光
素子で検出させて物体検知がなされるようになつ
ているとともに、前記光学系および光素子の相対
的な位置関係を変えて検知可能領域を遠近させる
ための調節手段を備えている反射型光電スイツチ
において、前記調節手段が、前記位置関係変更の
ためになされる駆動量を前記検知可能範囲の移動
量に対し正比例させる構成を備えていることを特
徴とする反射型光電スイツチを提供することを目
的とする。
In order to achieve the above object, the present invention includes a light projecting optical system and a light emitting element, and the light projecting optical system projects light from the light emitting element to a detectable area, and a light receiving optical system and a light emitting element are provided. The light-receiving element is provided with a light-receiving element, and the object is detected by causing the light-receiving optical system to detect the light reflected by the object to be detected existing in the detectable area, and the optical system and a reflection type photoelectric switch comprising an adjusting means for changing the relative positional relationship of the optical elements to make the detectable area closer or closer, the adjusting means adjusting the amount of driving performed to change the positional relationship as described above. It is an object of the present invention to provide a reflective photoelectric switch characterized by having a configuration in which the detection range is directly proportional to the amount of movement.
以下、この発明にかかる反射型光電スイツチ
を、その実施例をあらわす図面を参照しながら説
明する。 DESCRIPTION OF THE PREFERRED EMBODIMENTS A reflective photoelectric switch according to the present invention will be described below with reference to drawings showing embodiments thereof.
第１図は、この発明にかかる反射型光電スイツ
チの一実施例の要部を破断してあらわしたもので
ある。第２図は、この反射型光電スイツチの光学
関係まわりの構成を模式的にあらわしたものであ
る。 FIG. 1 is a cutaway view of an essential part of an embodiment of a reflective photoelectric switch according to the present invention. FIG. 2 schematically shows the optical structure of this reflective photoelectric switch.
反射型光電スイツチ１は、投光用レンズ２を有
する投光用光学系と受光用レンズ３を有する受光
用光学系を備えている。投光用レンズ２の後方に
は発光素子４があり、この素子から出た光は投光
用光学系によつて、検知可能領域に投光される。
検知可能領域に存在する被検知物体Ｍで反射され
た光は、受光用光学系で集光されて受光用レンズ
３の後方にある受光素子５で検出される。このよ
うにして、被検知物体Ｍの検知がなされる。検知
可能領域の位置を遠近させる場合には、前記光学
系および光素子の相対的な位置関係を変える。こ
のため、反射型光電スイツチ１は、受光用レンズ
３の位置を変えて検知可能領域の位置を遠近させ
る調節手段を備えている。 The reflective photoelectric switch 1 includes a light projecting optical system having a light projecting lens 2 and a light receiving optical system having a light receiving lens 3. There is a light emitting element 4 behind the light projection lens 2, and the light emitted from this element is projected onto a detectable area by the light projection optical system.
The light reflected by the object M present in the detectable area is collected by the light receiving optical system and detected by the light receiving element 5 located behind the light receiving lens 3. In this way, the object M to be detected is detected. In order to move the detectable region closer or closer, the relative positional relationship between the optical system and the optical element is changed. For this reason, the reflective photoelectric switch 1 is equipped with an adjusting means that changes the position of the light receiving lens 3 to make the detectable area closer or closer.
調節手段は、受光用レンズ３を保持するレンズ
保持部材６を備えるとともに、このレンズ保持部
材６を駆動するための操作部材７を備えている。
レンズ保持部材６のねじ溝６ａと操作部材７のね
じ山７ｂで係合している。操作部材７は、その先
端がケース８表面に突出するようにして取り付け
られている。操作部材７の先端に形成されたみぞ
７ａにマイナスドライバーを差し込んで、操作部
材７を正逆回転させると、ねじ係合の状態が変わ
つて、レンズ保持部材６が上下に移動する。つま
り、第２図にみるように、受光用レンズ３の位置
が上下に動いて受光用光学系による受光光路が変
化するのである。第２図において、受光用レンズ
３の位置がｌ＝０である時は、検知可能領域の位
置はLaであり、受光用レンズ３の位置がｌ＝l1と
なると、検知可能領域の位置はLbとなり、受光
用レンズ３の位置がｌ＝l2となると、検知可能領
域の位置はLcへと移動する。したがつて、受光
用レンズ３の位置と検知可能領域の位置の関係を
図にしてあらわすと、第３図に示すようになる。
すなわち、受光用レンズ３の同じ移動量に対し、
検知可能領域が反射型光電スイツチ１から遠いと
ころにある場合と、近いところにある場合とで、
検知可能領域の移動量が異なるのである。 The adjusting means includes a lens holding member 6 that holds the light receiving lens 3, and an operating member 7 for driving the lens holding member 6.
The thread groove 6a of the lens holding member 6 and the thread 7b of the operating member 7 are engaged with each other. The operating member 7 is attached so that its tip protrudes from the surface of the case 8. When a flat head screwdriver is inserted into a groove 7a formed at the tip of the operating member 7 and the operating member 7 is rotated in forward and reverse directions, the state of screw engagement changes and the lens holding member 6 moves up and down. That is, as shown in FIG. 2, the position of the light-receiving lens 3 moves up and down, and the light-receiving optical path by the light-receiving optical system changes. In Fig. 2, when the position of the light-receiving lens 3 is l=0, the position of the detectable area is La, and when the position of the light-receiving lens 3 is l= l1 , the position of the detectable area is La. When Lb is reached and the position of the light receiving lens 3 becomes l=l 2 , the position of the detectable area moves to Lc. Therefore, the relationship between the position of the light-receiving lens 3 and the position of the detectable area is illustrated in FIG. 3.
That is, for the same amount of movement of the light receiving lens 3,
When the detectable area is far from the reflective photoelectric switch 1 and when it is close to the reflective photoelectric switch 1,
The amount of movement of the detectable area is different.
しかしながら、反射型光電スイツチ１では、レ
ンズ保持部材６と操作部材７間のねじ係合におけ
るねじ７ｂの勾配が一定ではなく、操作部材７の
回転駆動量を検知可能範囲の移動量に正比例させ
ることができるような勾配とされているので、回
転駆動量と検知可能範囲の位置関係をグラフにあ
らわすと、第４図にみるように、直線になる。つ
まり、周方向に沿つてつけられるねじ７ｂの勾配
は、一定ではなく、第３図に示された非線形状態
を補正し、第４図に示された直線状態となるよう
に非線形にねじ勾配がつけられているのである。 However, in the reflective photoelectric switch 1, the slope of the screw 7b in the threaded engagement between the lens holding member 6 and the operating member 7 is not constant, and the amount of rotational drive of the operating member 7 is directly proportional to the amount of movement in the detectable range. Since the slope is such that the rotational drive amount and the positional relationship of the detectable range are expressed in a graph, as shown in FIG. 4, it becomes a straight line. In other words, the slope of the screw 7b installed along the circumferential direction is not constant, but the slope of the screw is adjusted non-linearly so that the non-linear state shown in FIG. 3 is corrected and the straight-line state shown in FIG. It is attached.
つまり、ねじ勾配のつけ方によつては、回転駆
動量と検知可能範囲の位置関係が、第４図に一点
鎖線で示すように、様々な非直線関係になるとこ
ろを、実線で示すような直線関係となるように、
ねじ勾配がつけられているのである。 In other words, depending on how the screw slope is set, the rotational drive amount and the positional relationship between the detectable range may have various non-linear relationships, as shown by the dashed line in Figure 4, or as shown by the solid line. So that there is a linear relationship,
The thread is sloped.
従来は、第６図にみるように、回転駆動量を不
等間隔目盛りＥで目盛り検知可能範囲の一定移動
量と対応させ表示しなければならず、しかも、各
目盛り内でも、回転駆動量は検知可能範囲の一定
移動量に対応していなかつた。しかしながら、こ
の発明の反射型光電スイツチ１では、第７図にみ
るように、操作部材７の回転駆動量を等間隔目盛
りＥで目盛り検知可能範囲の一定移動量と対応さ
せ表示することができ、しかも、各目盛り内で
も、回転駆動量が検知可能範囲の一定移動量に対
応している。そのため、常に、同じ回転駆動量
で、所望の距離動かすことができるので、検知可
能範囲の設定・調整を迅速、容易におこなうこと
ができる。 Conventionally, as shown in Fig. 6, the amount of rotational drive had to be displayed on unevenly spaced scales E in correspondence with a fixed amount of movement within the scale detectable range, and even within each scale, the amount of rotational drive had to be displayed. It did not support a fixed amount of movement in the detectable range. However, in the reflective photoelectric switch 1 of the present invention, as shown in FIG. 7, the amount of rotational drive of the operating member 7 can be displayed using equally spaced scales E in correspondence with a fixed amount of movement within the scale detectable range. Moreover, even within each scale, the amount of rotational drive corresponds to a fixed amount of movement within the detectable range. Therefore, since it is possible to always move the desired distance with the same amount of rotational drive, it is possible to quickly and easily set and adjust the detectable range.
なお、第８図にみるように、操作部材７のねじ
山７ｄが、検知可能範囲に対応する駆動の一端か
ら他端に短絡するようエンドレスのひと山となつ
ている。ねじ山７ｄの始めと終わりがつながつた
エンドレスであると、駆動の始めと終わりの個所
にストツプ機構を設ける必要がない。さらに、操
作部材７を回しすぎても、第９図にみるように、
再び、最初の状態に戻るだけであるから、操作部
材７を強く回し過ぎて破損させるようなことを阻
止することもできる。 As shown in FIG. 8, the thread 7d of the operating member 7 is an endless thread so as to short-circuit from one end of the drive corresponding to the detectable range to the other end. If the screw thread 7d is endless with its beginning and end connected, there is no need to provide a stop mechanism at the beginning and end of the drive. Furthermore, even if the operating member 7 is turned too much, as shown in FIG.
Since the operation member 7 is simply returned to its initial state again, it is possible to prevent the operation member 7 from being turned too strongly and being damaged.
また、第１０図ａ，ｂにみるように、ねじ溝６
ａの幅が一定の場合、操作部材７のねじ山７ｂの
厚みが、勾配が急（Θ1）な個所において薄く
（t1）、勾配や緩やか（Θ2）な個所において厚く
（t2）なつていると、ねじ山７ｂはねじ溝６ａに
ほとんど隙間なく係合する。そのため、検知可能
範囲の設定・調整時の逆回転させる場合、バツク
ラツシユを少なく、かつ一定にできるので、作業
がし易くなる。作業終了後も、ねじ係合状態がし
つかりしているので、振動・衝撃によつて、設定
が変わつてしまうのを阻止できる。また、ねじ山
を厚くした個所は強度が増し、製作も容易であ
る。なお、ねじ山の厚みが一定で、非線形勾配を
有するねじ溝と係合する場合は、ねじ溝の幅を勾
配に応じて変えればよい。 In addition, as shown in Fig. 10a and b, the thread groove 6
When the width of a is constant, the thickness of the thread 7b of the operating member 7 is thinner (t1) where the slope is steeper (Θ1) and thicker (t2) where the slope is gentler (Θ2). , the thread 7b engages with the thread groove 6a with almost no clearance. Therefore, when rotating in reverse when setting and adjusting the detectable range, backlash can be reduced and kept constant, making the work easier. Even after the work is completed, the screw engagement remains firm, which prevents settings from changing due to vibrations or shocks. In addition, the parts with thicker threads have increased strength and are easier to manufacture. Note that when the thickness of the thread is constant and the thread groove is to be engaged with a thread groove having a non-linear slope, the width of the thread groove may be changed according to the slope.
第１１図にみる操作部材７は、先端に着脱自在
の先端部７ｅを備えている。この先端部７ｅは、
嵌合部分に複数の係止突起７ｈを有している。一
方、固定部７ｆの嵌合孔７ｊには複数の係止溝７
ｉを有している。そのため、先端部７ｅと固定部
７ｆは、複数の位置で嵌合できるようになつてい
る。設定・調整が済んだ後、先端部７ｅをはずし
ておけば、はずみで先端部７ｃが動いて、設定が
ずれるといつたこともない。しかも、先端部７ｅ
と固定部７ｆの嵌め合い個所を変えて、指標７ｃ
と目盛りＦの位置関係を所望のようにすることが
できるので、指標７ｃの位置を検知可能範囲位置
に正確に対応させることができる。 The operating member 7 shown in FIG. 11 has a removable tip 7e at its tip. This tip 7e is
The fitting portion has a plurality of locking protrusions 7h. On the other hand, a plurality of locking grooves 7 are provided in the fitting hole 7j of the fixing part 7f.
It has i. Therefore, the tip portion 7e and the fixing portion 7f can be fitted together at a plurality of positions. If you remove the tip 7e after completing the settings and adjustments, you will never have to worry about the tip 7c moving and changing the settings. Moreover, the tip portion 7e
By changing the fitting point of the fixed part 7f and the index 7c,
Since the positional relationship between and the scale F can be set as desired, the position of the index 7c can be made to correspond accurately to the detectable range position.
また、レンズ保持部材６と操作部材７の係合
が、第１３図および第１４図ａ，ｂにみるよう
に、柱状突起６ｇ、および、らせん状につけられ
ている溝７ｇによつてなされていてもよい。柱状
突起６ｇの水平断面は、第１４図ｂにみるよう
に、略真円形であり、突起先端が半球状になつて
いる。なお、ここでいう水平断面とは柱状突起６
ｇが突出する方向に垂直な面を指す。 Further, as shown in FIGS. 13 and 14a and 14b, the lens holding member 6 and the operating member 7 are engaged with each other by a columnar projection 6g and a spiral groove 7g. Good too. As shown in FIG. 14b, the horizontal cross section of the columnar projection 6g is approximately a perfect circle, and the tip of the projection is semispherical. Note that the horizontal section here refers to the columnar projection 6.
g refers to the plane perpendicular to the direction in which it protrudes.
操作部材７を回転させると、溝７ｇから柱状突
起６ｇへ上下に移動させる力が作用し、レンズ保
持部材６が上下に移動する。 When the operating member 7 is rotated, a force is applied from the groove 7g to the columnar projection 6g to move the lens holding member 6 up and down.
このような係合の場合、溝７ｇが柱状突起６ｇ
と同じ形状の切削工具を用いて形成されている
と、柱状突起６ａと溝７ｇが、うまく嵌合してガ
タが少ない。 In such an engagement, the groove 7g is connected to the columnar projection 6g.
If a cutting tool having the same shape is used to form the columnar protrusion 6a and the groove 7g, the columnar protrusion 6a and the groove 7g fit together well and there is little play.
溝７ｇの勾配は、もちろん回転駆動量と検知可
能範囲の位置関係を直線関係とするように、一定
でなく非線形につけられているわけであるが、柱
状突起６ｇの水平断面形状によつては、勾配の緩
やかな個所では、柱状突起６ｇと溝７ｇ間に隙間
ができて、バツクラツシユの原因となるが、柱状
突起６ｇの水平断面形状が、第４図ｂにみるよう
に、略真円形であると、勾配が緩やかな場合、点
Ａおよび点A′でガタがないように係合しており、
勾配が急な場合、係合個所は移動するけれども、
一点鎖線に示すように、点Ｂおよび点B′でガタ
がないように係合していることは変わらない。柱
状突起６ｇの水平断面形状が略真円形であると、
このような勾配に緩・急があつてもバツクラツシ
ユが起きることが防げるのである。 Of course, the slope of the groove 7g is set not constant but in a non-linear manner so that the rotational drive amount and the positional relationship of the detectable range are in a linear relationship, but depending on the horizontal cross-sectional shape of the columnar projection 6g, In places where the slope is gentle, a gap is created between the columnar projection 6g and the groove 7g, causing a bump, but the horizontal cross-sectional shape of the columnar projection 6g is approximately a perfect circle, as shown in FIG. 4b. and when the slope is gentle, there is no play in engagement at points A and A',
If the slope is steep, the engagement points will move, but
As shown by the one-dot chain line, there is no change in the fact that they are engaged without play at points B and B'. When the horizontal cross-sectional shape of the columnar projection 6g is approximately a perfect circle,
Even if the gradient is gentle or steep, it is possible to prevent crashes from occurring.
第１５図は、第１３図による係合を用いた反射
型光電スイツチ１′をあらわす。もちろん柱状突
起６ｇおよび溝７ｇの形状が図示のものに限らな
いことはいうまでもない。 FIG. 15 shows a reflective photoelectric switch 1' using the engagement according to FIG. It goes without saying that the shapes of the columnar projections 6g and the grooves 7g are not limited to those shown in the drawings.
第１２図は、電気回路部１１のブロツク図であ
る。発光素子から出た光は、被検知物体で反射し
て受光素子（具体的には一次元位置検出素子や２
分割ピンフオトダイオードなどが用いられる）に
入る。受光素子からの信号IA・IB受光回路で増幅
されたあと、比較回路で比較した後、信号処理回
路で判断し受光有りとされると、検知出力が出力
回路から出される。発振回路は一定間隔のパルス
を出力していて、出力パルスはドライブ回路に送
られ、投光を間歇的に行うようにするとともに、
信号処理回路にも送られていて、投光がなされて
いる時にのみ信号有無の判定がなされるようにし
ている。通常、３〜５回つづけて信号有りとされ
た時に検知出力が出される。 FIG. 12 is a block diagram of the electric circuit section 11. The light emitted from the light-emitting element is reflected by the object to be detected and sent to the light-receiving element (specifically, a one-dimensional position detection element or two-dimensional position detection element).
(a split-pin photodiode, etc. is used). After the signals I A and I B from the light receiving elements are amplified by the light receiving circuit and compared by the comparing circuit, the signal processing circuit determines that light has been received, and a detection output is output from the output circuit. The oscillation circuit outputs pulses at regular intervals, and the output pulses are sent to the drive circuit to emit light intermittently.
The signal is also sent to a signal processing circuit, so that the presence or absence of a signal is determined only when light is being projected. Usually, a detection output is output when a signal is detected 3 to 5 times in a row.
この考案は、以上の実施例に限定されない。例
えば、受光用レンズを動かすかわりに、投光用レ
ンズを動かすようにしてもよい。また、レンズは
固定しておいて、光素子の方を動かすようにして
もよい。 This invention is not limited to the above embodiments. For example, instead of moving the light receiving lens, the light projecting lens may be moved. Alternatively, the lens may be fixed and the optical element may be moved.
以上に述べたように、この発明にかかる反射型
光電スイツチは、検知可能領域を遠近させるため
の前記調節手段が、遠近のためになされる駆動量
を前記検知可能範囲の移動量に対し正比例させる
構成を備えている。そのため、検知可能領域の設
定・変更が迅速容易におこなえるようになつた。
As described above, in the reflective photoelectric switch according to the present invention, the adjusting means for moving the detectable area further or further makes the amount of driving performed for moving the detectable area directly proportional to the amount of movement of the detectable area. It has a configuration. Therefore, it has become possible to quickly and easily set and change the detectable area.
第１図は、この発明にかかる反射型光電スイツ
チの一実施例の要部構成をあらわす一部断面図、
第２図は、この反射型光電スイツチの光学関係ま
わりの構成を模式的にあらわした説明図、第３図
は、受光用レンズの位置と検知可能領域の位置の
関係をあらわすグラフ、第４図は、上記反射型光
電スイツチにおける操作部材の駆動量と検知可能
領域の移動位置の関係をあらわすグラフ、第５図
は、レンズ保持部材と操作部材の外観をあらわす
斜視図、第６図および第７図は、駆動量を示す目
盛りの様子をあらわした平面図、第８図は、操作
部材の別の例をあらわす斜視図、第９図は、この
操作部材を使つたときの受光用レンズの位置と検
知可能領域の位置の関係をあらわすグラフ、第１
０図は、ねじ溝とねじ山の厚みの関係あらわす説
明図、第１１図ａは、操作部材の他の例をあらわ
す斜視図、第１１図ｂは、この操作部材を使用し
た反射型光電スイツチの要部構成をあらわした部
分断面図、第１２図は、反射型光電スイツチの電
気回路のブロツク図、第１３図は、レンズ保持部
材と操作部材の他の例をあらわす外観斜視図、第
１４図ａは、このレンズ保持部材と操作部材の係
合まわりの構成をあらわす断面図、第１４図ｂ
は、第１４図ａの−断面図、第１５図は、第
１３図に示したレンズ保持部材と操作部材を備え
たこの発明にかかる反射型光電スイツチの要部構
成をあらわす一部断面図である。
１，１′……反射型光電スイツチ、２……投光
用レンズ、３……受光用レンズ、４……発光素
子、５……受光素子、６……レンズ保持部材（調
節手段の一部）、７……操作部材（調節手段の一
部）。
FIG. 1 is a partial cross-sectional view showing the main structure of an embodiment of a reflective photoelectric switch according to the present invention;
Figure 2 is an explanatory diagram schematically showing the optical configuration of this reflective photoelectric switch, Figure 3 is a graph showing the relationship between the position of the light receiving lens and the position of the detectable area, and Figure 4. 5 is a graph showing the relationship between the drive amount of the operating member and the moving position of the detectable area in the reflective photoelectric switch, FIG. 5 is a perspective view showing the appearance of the lens holding member and the operating member, and FIGS. 6 and 7 are The figure is a plan view showing the scale indicating the amount of drive, Figure 8 is a perspective view showing another example of the operating member, and Figure 9 is the position of the light receiving lens when using this operating member. Graph showing the relationship between the detection area and the position of the detectable area, the first
Fig. 0 is an explanatory diagram showing the relationship between the thickness of the thread groove and the thread thread, Fig. 11a is a perspective view showing another example of the operating member, and Fig. 11b is a reflective photoelectric switch using this operating member. 12 is a block diagram of the electric circuit of the reflective photoelectric switch. FIG. 13 is an external perspective view showing another example of the lens holding member and the operating member. Figure a is a sectional view showing the structure around the engagement between the lens holding member and the operating member, and Figure 14 b
14a is a cross-sectional view taken from FIG. be. DESCRIPTION OF SYMBOLS 1, 1'...Reflection type photoelectric switch, 2... Lens for projecting light, 3... Lens for light receiving, 4... Light emitting element, 5... Light receiving element, 6... Lens holding member (part of adjustment means) ), 7... Operating member (part of the adjustment means).
Claims (1)
この投光用光学系により発光素子の光を検知可能
領域に投光するとともに、受光用光学系および受
光素子を備えていて、前記検知可能領域に存在す
る被検知物体で反射された光を前記受光用光学系
により受光素子で検出させて物体検知がなされる
ようになつているとともに、前記光学系および光
素子の相対的な位置関係を変えて検知可能領域を
遠近させるための調節手段を備えている反射型光
電スイツチにおいて、前記調節手段が、前記位置
関係変更のためになされる駆動量を前記検知可能
範囲の移動量に対し正比例させる構成を備えてい
ることを特徴とする反射型光電スイツチ。 ２ 調節手段が、一方の光学系におけるレンズ保
持部材にねじ係合する操作部材を備えていて、操
作部材を外部から回転駆動することにより前記保
持部材が移動して位置関係変更がなされるように
なつており、前記ねじ係合におけるねじ勾配が正
比例をさせるようにつけられていて、前記回転駆
動量を示す目盛りが等間隔になつている特許請求
の範囲第１項記載の反射型光電スイツチ。 ３ ねじ係合におけるねじ山が、検知可能範囲に
対応する駆動の一端から他端に短絡するようエン
ドレスのひと山となつている特許請求の範囲第２
項記載の反射型光電スイツチ。 ４ ねじ係合におけるねじ山の厚みが、勾配が急
な個所において薄く、勾配が緩やかな個所におい
て厚くなつている特許請求の範囲第２項または第
３項記載の反射型光電スイツチ。 ５ 操作部材が、先端に取り外し可能に嵌合する
外部操作軸を備えており、この外部操作軸が複数
の位置で嵌合できるようになつている特許請求の
範囲第２項から第４項までのいずれかに記載の反
射型光電スイツチ。[Claims] 1. Comprising a light projection optical system and a light emitting element,
The light emitting optical system projects the light of the light emitting element onto a detectable area, and also includes a light receiving optical system and a light receiving element, and transmits the light reflected by the object to be detected existing in the detectable area to the detectable area. The object is detected by a light-receiving element using a light-receiving optical system, and includes adjusting means for changing the relative positional relationship between the optical system and the optical element to make the detectable area more or less distant. A reflective photoelectric switch characterized in that the adjustment means is configured to make the amount of driving performed for changing the positional relationship directly proportional to the amount of movement of the detectable range. . 2. The adjusting means includes an operating member that is threadedly engaged with a lens holding member in one optical system, and the holding member is moved by rotating the operating member from the outside to change the positional relationship. 2. A reflective photoelectric switch according to claim 1, wherein the screw slope in the screw engagement is directly proportional, and the scales indicating the amount of rotational drive are equally spaced. 3. Claim 2, wherein the thread in the threaded engagement is an endless thread so as to short-circuit from one end of the drive corresponding to the detectable range to the other end.
Reflective photoelectric switch described in Section 1. 4. The reflective photoelectric switch according to claim 2 or 3, wherein the thickness of the thread in the threaded engagement is thinner at locations where the slope is steep and thicker at locations where the slope is gentler. 5. Claims 2 to 4, wherein the operating member is provided with an external operating shaft that is removably fitted to the tip, and the external operating shaft can be fitted in a plurality of positions. A reflective photoelectric switch according to any one of the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19975286A JPS6355827A (en) | 1986-08-26 | 1986-08-26 | Reflection type photoelectric switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19975286A JPS6355827A (en) | 1986-08-26 | 1986-08-26 | Reflection type photoelectric switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6355827A JPS6355827A (en) | 1988-03-10 |
| JPH0528458B2 true JPH0528458B2 (en) | 1993-04-26 |
Family
ID=16413039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19975286A Granted JPS6355827A (en) | 1986-08-26 | 1986-08-26 | Reflection type photoelectric switch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6355827A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101531349B1 (en) * | 2014-09-04 | 2015-06-25 | 대한민국 | Leuconostoc mesenteroides SK-1 isolated from octopus Baechu kimchi and method for preparing seafood kimchi using the same |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0326945U (en) * | 1989-07-26 | 1991-03-19 |
-
1986
- 1986-08-26 JP JP19975286A patent/JPS6355827A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101531349B1 (en) * | 2014-09-04 | 2015-06-25 | 대한민국 | Leuconostoc mesenteroides SK-1 isolated from octopus Baechu kimchi and method for preparing seafood kimchi using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6355827A (en) | 1988-03-10 |
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