JPS6270787A - State discrimination type multiple optical axis photoelectric switch - Google Patents
State discrimination type multiple optical axis photoelectric switchInfo
- Publication number
- JPS6270787A JPS6270787A JP60211593A JP21159385A JPS6270787A JP S6270787 A JPS6270787 A JP S6270787A JP 60211593 A JP60211593 A JP 60211593A JP 21159385 A JP21159385 A JP 21159385A JP S6270787 A JPS6270787 A JP S6270787A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- signal
- light
- light blocking
- upper slide
- 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.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 title abstract description 15
- 238000001514 detection method Methods 0.000 claims abstract description 36
- 238000011835 investigation Methods 0.000 claims abstract description 7
- 230000006870 function Effects 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 abstract description 15
- 238000000034 method Methods 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/28—Arrangements for preventing distortion of, or damage to, presses or parts thereof
- B30B15/285—Arrangements for preventing distortion of, or damage to, presses or parts thereof preventing a full press stroke if there is an obstruction in the working area
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Geophysics And Detection Of Objects (AREA)
- Presses And Accessory Devices Thereof (AREA)
- Switches Operated By Changes In Physical Conditions (AREA)
- Optical Radar Systems And Details Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、各種プレス機用安全装置の検出装置として
用いられる多光軸光電スイッチの改良に関し、光軸の遮
断状態の変化を検知、判断して、その状態に応じて適切
な制御信号を出力し得るようにしたことを特徴とする状
態判別形多光軸光電スイッチに関する。[Detailed Description of the Invention] [Industrial Application Field] This invention relates to the improvement of a multi-optical axis photoelectric switch used as a detection device for safety devices for various press machines, and is capable of detecting and determining changes in the blocking state of optical axes. The present invention relates to a state-determining multi-optical axis photoelectric switch that is capable of outputting an appropriate control signal depending on the state.
従来から、プレス機による手・指等の切断事故防止の安
全装置として、手払式、機械式或いは光線式など種々の
方式の安全装置が使用されているが、上記手払式や機械
式の安全装置は、プレス機の作動開始と同時に作業者の
手を強制的に持ち上げたり、プレス機前面で防御シャッ
ターが下降する等、その構造上プレス機が作動中は作業
者を物理的にプレス機から遠ざけるようにしたものであ
った為、その都度プレス作業が中断し、作業能率の低下
を招いていたばかりでなく、特にプレスブレーキ装置等
、加工材料の一端を作業者が手で支持してプレス加工を
施す必要のある作業などにおいては、全く採用できない
という欠点が見られたのである。Conventionally, various types of safety devices such as manual, mechanical, and light beam types have been used as safety devices to prevent accidents involving cutting of hands, fingers, etc. by press machines. Due to its structure, safety devices force the worker to lift the worker's hand as soon as the press starts operating, or a protective shutter lowers at the front of the press. This not only caused the press work to be interrupted each time, resulting in a decrease in work efficiency, but also meant that the press brake equipment, in particular, required the operator to support one end of the material with his/her hand during the press. The drawback was that it could not be used at all in work that required processing.
そこでこのような場合、反射形成いは透過形の投受光器
を多数直線状に配列した光線式の検出機構を備えた安全
装置を使用し、プレス機の前面にめぐらした多数の光軸
の遮断状態を検知してプレス機の上部スライドの下降を
急停止し得るようにしていたのであるが、これに使用さ
れる多光軸光電スイッチは、例えば、それが単一光軸検
知方式では一光軸又はそれ以上の光軸が遮断された場合
、又連続二光軸検知方式では互いに隣り合う二元軸以上
の連続遮光状態が検知された場合、直ちにその検知信号
を出力し、上部スライドの下降を急停止するようにした
ものであったから、上記プレスブレーキ装置のように加
工材料を手で支持して作業する場合には、材料自身の厚
さや材料を傾けて挿入することにより光軸が遮断された
場合にもプレス機の上部スライドが停止して、作業が開
始できないという問題点が見られたのである。Therefore, in such cases, we use a safety device equipped with a light beam detection mechanism that has many reflection-forming or transmission-type light emitters and receivers arranged in a straight line, and interrupts the many optical axes that surround the front of the press. It was possible to suddenly stop the lowering of the upper slide of the press by detecting the condition, but the multi-optical axis photoelectric switch used for this, for example, has a single-optical-axis detection method. If one or more optical axes are blocked, or in the case of continuous two-axis detection method, if two or more adjacent axes are continuously blocked, the detection signal is immediately output and the upper slide is lowered. The machine was designed to stop suddenly, so when working with the material supported by hand like in the press brake device mentioned above, the optical axis can be blocked by the thickness of the material itself or by inserting the material at an angle. Even when the press machine was opened, the upper slide of the press would stop, making it impossible to start work.
このような実情に鑑み本発明は、この種多光軸光電スイ
ッチにおいて、連続工遮光検知回路と、一遮光検知回路
の信号及び調査指令信号から一遮光状態のとき信号を発
する記憶ゲート回路と、該記憶ゲート回路からの信号を
記憶する記憶回路と、上記連続工遮光検知回路、記憶回
路及び一遮光検知回路の各信号を判別する出力ゲート回
路とからなる状態判別機能を付与することにより、上記
問題点を解決したものである。In view of these circumstances, the present invention provides a multi-optical axis photoelectric switch of this type, which includes a continuous light-blocking detection circuit, a memory gate circuit that emits a signal when one light-blocking state occurs based on the signal of the one-block detection circuit and an investigation command signal, By providing a state discrimination function consisting of a memory circuit that stores the signal from the memory gate circuit and an output gate circuit that discriminates each signal of the continuous light shielding detection circuit, the memory circuit, and the one light shielding detection circuit, This solves the problem.
叙上の構成に係る本発明の状態判別形多光軸光電スイッ
チは、上部スライドの下降時に調査指令信号を出してそ
の時の遮光状態を記憶し、出力ゲート回路で遮光状態の
変化を判別して、上部スライド下降中に遮光状態に変化
がない場合には制御出力信号を出さず、プレス加工を継
続させると共に、作業中手や指が誤って入り遮光状態が
変化した場合には、上記状態判別機能が直ちに上部スラ
イドを急停屯させる信号を出力するという格別の作用を
奏するものである。The state-determining multi-optical axis photoelectric switch of the present invention according to the above configuration outputs an investigation command signal when the upper slide is lowered, stores the light-shielding state at that time, and determines changes in the light-shielding state with an output gate circuit. If there is no change in the light-shielding state while the upper slide is descending, the control output signal is not output and press processing continues, and if a hand or finger accidentally enters during work and the light-shielding state changes, the above-mentioned state determination is performed. This function has a special effect in that it immediately outputs a signal that causes the upper slide to come to a sudden stop.
以下、本発明の状態判別形多光軸光電スイッチを図面に
示す一つの実施例に基づいて更に詳述すると、第１図に
おいて、１はプレス機の上部スライド、２はその受板、
３は例えば赤外発光ダイオードからなる投光器４・・番
及びフォトトランジスタからなる受光器５・・・を交互
に８組直線状に配してなる投受光ユニット、６は反射ミ
ラーであって、上記投受光ユニット３と反射ミラー６は
プレス機の作業域前面の互いに対向する位置に設けられ
、両者間の光軸の遮光状態を判別可能として、プレス機
内への異物の侵入を検知し得るようにしたものである。Hereinafter, the state-discriminating multi-optical axis photoelectric switch of the present invention will be described in more detail based on one embodiment shown in the drawings. In FIG. 1, 1 is an upper slide of a press, 2 is a receiving plate thereof,
Reference numeral 3 denotes a light emitting/receiving unit consisting of eight sets of light emitters 4 made of, for example, infrared light emitting diodes and light receivers 5 made of phototransistors, arranged alternately in a straight line; 6 is a reflecting mirror; The light emitting/receiving unit 3 and the reflecting mirror 6 are provided at positions facing each other in the front of the working area of the press machine, so that it is possible to determine the state of shading of the optical axis between them, and to detect the intrusion of foreign matter into the press machine. This is what I did.
又、７は上記投受光ユニット３に併設されるコントロー
ルユニットであって、下達する光軸の状態判別機能を含
む各制御機構を有するものである。Reference numeral 7 denotes a control unit attached to the light emitting/receiving unit 3, which has various control mechanisms including a function of determining the state of the optical axis.
次に、第２図は、上記コントロールユニット７内の光軸
状態判別機能の回路の概略を示すブロック図であって、
１１は一定周期で発振する基準発振器、１２は上記基準
発振器１１の発振信号を分周して各回路の同期を図り制
御信号とする分周回路、又１３は該分周回路１２の信号
により順次連続的に投光器４・・・を発光させる投光制
御回路、１４は上記投光器４・・・の発光と同期して受
光状態を順次検知する受光器５・・・の検知信号を直列
的に変換する受光制御回路である。Next, FIG. 2 is a block diagram schematically showing a circuit for the optical axis state determination function in the control unit 7, and includes:
11 is a reference oscillator that oscillates at a constant cycle; 12 is a frequency dividing circuit that divides the oscillation signal of the reference oscillator 11 to synchronize each circuit and uses it as a control signal; A light emission control circuit that causes the light emitters 4 to emit light continuously; 14 serially converts the detection signal of the light receiver 5 that sequentially detects the light receiving state in synchronization with the light emission of the light emitters 4... This is a light reception control circuit.
又１５は上記受光制御回路１４からの検知信号を増幅す
る増幅回路、１Ｂはその増幅検知信号から一遮光の状態
を判別する一遮光検知回路、１７は同じく連続二遮光の
状態を判別する連続工遮光検知回路である。Further, 15 is an amplifier circuit for amplifying the detection signal from the light reception control circuit 14, 1B is a one-light-shielding detection circuit for determining the state of one light-shielding from the amplified detection signal, and 17 is a continuous circuit for determining the state of two consecutive light-shieldings. This is a light shielding detection circuit.
更に、１８はプレス機の上部スライド１が下降を開始し
たとき発せられる調査指令信号ＣＨと上記一遮光検知回
路１６の検知信号とを判別し、−遮光状態のときのみ記
憶回路１９に信号を送る記憶ゲート回路、２０は上記記
憶回路１９の信号、一遮光検知回路１６の信号及び連続
工遮光検知回路１７の信号を判別し、
（イ） 一遮光検知回路１８の検知信号のみがある場合
、
（ロ） −遮−光検知回路１６及び連続工遮光検知回路
１７の検知信号がある場合、
（ハ） 一遮光検知回路１８、連続工遮光検知回路１７
及び記憶回路１８の信号がある場合、に信号、を出す出
力ゲート回路である。Furthermore, 18 discriminates between the investigation command signal CH issued when the upper slide 1 of the press machine starts to descend and the detection signal of the light shielding detection circuit 16, and sends a signal to the memory circuit 19 only when the light is shielded. The storage gate circuit 20 discriminates the signal of the storage circuit 19, the signal of the one light shading detection circuit 16, and the signal of the continuous light shading detection circuit 17, and (a) When there is only the detection signal of the one light shading detection circuit 18, ( (b) - When there is a detection signal from the light shading detection circuit 16 and the continuous work shading detection circuit 17, (c) The one light shading detection circuit 18 and the continuous work shading detection circuit 17
This is an output gate circuit that outputs a signal when there is a signal from the storage circuit 18.
又、２１は上記出力ゲート回路２０の信号を直流レベル
に変換する積分回路、２２は変換された信号を上部スラ
イド急停止装置等適宜な制御機器に出力する出力回路で
ある。Further, 21 is an integrating circuit that converts the signal from the output gate circuit 20 into a DC level, and 22 is an output circuit that outputs the converted signal to an appropriate control device such as an upper slide sudden stop device.
尚、Ｒは上部スライド１の上昇時に発せられる記憶回路
１９のリセット信号である。Note that R is a reset signal for the memory circuit 19 that is generated when the upper slide 1 is raised.
次に、上記ブロック図の動作について述べると、第３図
は投受光ユニット３と反射ミラー６の間に遮光物がない
場合又は加工材料が薄く光軸を遮断していない場合のタ
イムチャートであって、プレス機が始動して上部スライ
ド１が下降を開始すると調査指令信号ＣＨが出される。Next, to describe the operation of the above block diagram, FIG. 3 is a time chart when there is no light blocking object between the light emitting/receiving unit 3 and the reflecting mirror 6, or when the processed material is thin and does not block the optical axis. Then, when the press starts and the upper slide 1 starts descending, an investigation command signal CH is issued.
このとき投受光ユニット３は繰り返し遮光状態を検知し
ているが、遮光物がない為一遮光検知回路１Ｂからは信
号が出す記憶ゲート回路１８は作動しないから、記憶回
路１８には一遮光状態の情報は記憶されない。At this time, the light emitting/receiving unit 3 repeatedly detects the light-blocking state, but since there is no light-blocking object, the memory gate circuit 18 that outputs a signal from the one-light-blocking detection circuit 1B does not operate, so the memory circuit 18 does not detect the one-light-blocking state. Information is not stored.
而して、その後も遮光状態が検知されない場合には、出
力ゲート回路２０に信号は入力されないから上部スライ
ド１は下降を続け、一連のプレス工程が終了するのであ
る。If the light shielding state is not detected after that, no signal is input to the output gate circuit 20, so the upper slide 1 continues to descend, and the series of pressing steps ends.
この場合、上部スライド１の下降中に誤って手などが入
り遮光状態が変化して一光軸以上の遮光が検知され−ば
、一遮光検知回路１８から遮光信号が出され出力ゲート
回路２０が作動するから、出力回路２１から信号が出さ
れ、適宜な制御機器を介して上部スライド１は下降を急
停止するのである。In this case, if a hand or the like accidentally enters during the lowering of the upper slide 1 and the light blocking state changes and light blocking of one optical axis or more is detected, a light blocking signal is output from the one light blocking detection circuit 18 and the output gate circuit 20 is activated. When activated, a signal is output from the output circuit 21, and the upper slide 1 suddenly stops descending via an appropriate control device.
また第４図は調査指令信号ＣＨの出力時、加工材料によ
って一光軸が既に遮光状態にある場合のタイムチャート
であって、一遮光検知回路１６から信号が出され、記憶
ゲート回路１８を通して記憶回路１９に一遮大状態の情
報が記憶されている。FIG. 4 is a time chart when one optical axis is already blocked by the processing material when the investigation command signal CH is output, and a signal is output from the one blocking detection circuit 16 and stored through the storage gate circuit 18. The circuit 19 stores information on a one-off state.
その後、継続して遮光状態を検知し、一遮光検知回路１
６により一連光状態のみが検知されても出力ゲート回路
２０は作動しないから、上部スライド１は下降を続は一
連のプレス工程が終了するが、加工材料を持つ手などに
より連続した二元軸以上が遮断され、連続工遮光検知回
路１７により連続二連光検知信号が出されると、出力ゲ
ート回路２０が作動して信号が出力され上部スライド１
は下降を急停止するのである。After that, the light-blocking detection circuit 1 continuously detects the light-blocking state.
Since the output gate circuit 20 does not operate even if only a series of light conditions are detected by 6, the upper slide 1 continues to descend and the series of pressing steps ends, but if the hand holding the material to be processed is pressed, the output gate circuit 20 does not operate. is interrupted and the continuous light shielding detection circuit 17 outputs a continuous double light detection signal, the output gate circuit 20 is activated and a signal is output, and the upper slide 1
The descent suddenly stops.
而して、いずれの場合においても、上部スライド上昇時
にリセット信号Ｒが出され記憶回路はリセットされ初期
状態に戻るのである。In either case, the reset signal R is issued when the upper slide is raised, and the memory circuit is reset to return to its initial state.
以上述べたように、本発明の状態判別形多光軸光電スイ
ッチによれば、プレス機の上部スライド下降時の光軸遮
断状態を記憶し、上部スライド下降中に手などが入って
遮光状態に変化が生じた場合にのみ上部スライドの下降
を急停止する信号を出すようにしたものであるから、従
来のようにプレスブレーキ装置やペングー装置等、作業
者が加工材料を手で持って作業することにより光軸を初
めから遮断するような場合においても、上部スライドの
下降が停止することがなく、作業能率が高まる上、作業
中、手などが入って危険な状態となった場合には、その
遮光状態の変化を検知して直ちに上部スライド急停止信
号を発して作業者の安全を図るという従来にない格別の
効果が期待できるものである。As described above, according to the state-discriminating multi-optical axis photoelectric switch of the present invention, the optical axis cut-off state when the upper slide of the press machine is lowered is memorized, and if a hand or the like gets in while the upper slide is lowered, the light-blocking state is detected. It is designed to issue a signal to suddenly stop the lowering of the upper slide only when a change occurs, so unlike conventional press brake devices and pengu devices, the operator has to hold the material to be processed by hand. As a result, even if the optical axis is blocked from the beginning, the lowering of the upper slide will not stop, increasing work efficiency, and in the event that a hand or other object gets into the workpiece during work, resulting in a dangerous situation. This device can be expected to have an unprecedented effect of detecting a change in the light shielding state and immediately issuing a sudden stop signal for the upper slide to ensure worker safety.
第１図は本発明の状態判別形多光軸光電スイッチをプレ
ス機に装置した状態を示す斜視図、第２図は光軸状態判
別機能の回路の概略を示すブロック図、又第３〜４図は
上記ブロック図の動作を示すタイムチャートである。
以 上
Ｅす、３
Ｆｉｇ斗FIG. 1 is a perspective view showing a state-discriminating multi-optical axis photoelectric switch of the present invention installed in a press, FIG. 2 is a block diagram schematically showing a circuit for the optical axis state-discriminating function, and FIG. The figure is a time chart showing the operation of the above block diagram. That's all, 3 Fig.
Claims (1)
ッチにおいて、連続二遮光検知回路１７と、一遮光検知
回路１６の信号及び調査指令信号ＣＨから一遮光状態の
とき信号を発する記憶ゲート回路１８と、該記憶ゲート
回路１８からの信号を記憶する記憶回路１９と、上記連
続二遮光検知回路１７、記憶回路１９及び一遮光検知回
路１６の各信号を判別する出力ゲート回路２０とからな
る状態判別機能を備えたことを特徴とする状態判別形多
光軸光電スッチ。1. In a multi-optical axis photoelectric switch in which a plurality of light emitters and receivers are arranged in a straight line, a memory that emits a signal when there is one light interruption from the signals of the consecutive two light interruption detection circuits 17 and one light interruption detection circuit 16 and the investigation command signal CH. A gate circuit 18, a memory circuit 19 that stores the signal from the memory gate circuit 18, and an output gate circuit 20 that discriminates each signal of the continuous two-shade detection circuit 17, the memory circuit 19, and the one-shade detection circuit 16. A state-discriminating multi-optical axis photoelectric switch characterized by having a state-discriminating function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60211593A JPS6270787A (en) | 1985-09-24 | 1985-09-24 | State discrimination type multiple optical axis photoelectric switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60211593A JPS6270787A (en) | 1985-09-24 | 1985-09-24 | State discrimination type multiple optical axis photoelectric switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6270787A true JPS6270787A (en) | 1987-04-01 |
| JPH0352035B2 JPH0352035B2 (en) | 1991-08-08 |
Family
ID=16608330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60211593A Granted JPS6270787A (en) | 1985-09-24 | 1985-09-24 | State discrimination type multiple optical axis photoelectric switch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6270787A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012199823A (en) * | 2011-03-22 | 2012-10-18 | Panasonic Industrial Devices Sunx Co Ltd | Multiple optical axis photoelectric sensor |
| CN108787933A (en) * | 2018-08-16 | 2018-11-13 | 协易科技精机(中国)有限公司 | A kind of novel photoelectric safety device holder |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5710481A (en) * | 1980-06-21 | 1982-01-20 | Sankei Kogyo Kk | Monitoring device using light signal |
| JPS57142578A (en) * | 1981-02-28 | 1982-09-03 | Riken Lens Kogyo Kk | Automatic check device for light beam type safety device |
-
1985
- 1985-09-24 JP JP60211593A patent/JPS6270787A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5710481A (en) * | 1980-06-21 | 1982-01-20 | Sankei Kogyo Kk | Monitoring device using light signal |
| JPS57142578A (en) * | 1981-02-28 | 1982-09-03 | Riken Lens Kogyo Kk | Automatic check device for light beam type safety device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012199823A (en) * | 2011-03-22 | 2012-10-18 | Panasonic Industrial Devices Sunx Co Ltd | Multiple optical axis photoelectric sensor |
| CN108787933A (en) * | 2018-08-16 | 2018-11-13 | 协易科技精机(中国)有限公司 | A kind of novel photoelectric safety device holder |
| CN108787933B (en) * | 2018-08-16 | 2024-06-07 | 协易科技精机(中国)有限公司 | Novel photoelectric safety device support |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0352035B2 (en) | 1991-08-08 |
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