JPH0152761B2 - - Google Patents
Info
- Publication number
- JPH0152761B2 JPH0152761B2 JP11374182A JP11374182A JPH0152761B2 JP H0152761 B2 JPH0152761 B2 JP H0152761B2 JP 11374182 A JP11374182 A JP 11374182A JP 11374182 A JP11374182 A JP 11374182A JP H0152761 B2 JPH0152761 B2 JP H0152761B2
- Authority
- JP
- Japan
- Prior art keywords
- manual mode
- switch
- gate
- output
- relay
- 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
Links
- 238000001514 detection method Methods 0.000 claims description 10
- 230000002159 abnormal effect Effects 0.000 claims description 9
- 230000005856 abnormality Effects 0.000 description 4
- 230000006378 damage Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B9/00—Safety arrangements
- G05B9/02—Safety arrangements electric
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Safety Devices In Control Systems (AREA)
Description
【発明の詳細な説明】
本発明は制御機械における操作スイツチの復帰
不良をフエールセーフする回路に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fail-safe circuit in case of failure of return of an operation switch in a control machine.
一般に数値制御工作機械における運転の方法は
通常手動式の押ボタン操作による手動モードと、
数値制御テープを始めとする自動モードの２種類
を具えている。手動モードは加工の段取替えや初
品切削準備の時に用いられ、また自動モードは量
産、継続生産用に専ら用いられる。工作機械の加
工工場では自動モード運転が稼動時間の殆どを占
めている。もし仮にこの自動モードによる運転中
に手動モードの押ボタンスイツチ群を操作した
り、または押ボタンスイツチが故障して、手動モ
ード用の信号送出をしても自動運転を妨げたり停
止させることは一般的に回避される様に設計され
ている。しかしながら前記の信号が送り出された
ままの状態でモード選択を自動モードから手動モ
ードへ切換えた場合は手動モード用の信号を受け
る制御要素は直ちにその指令動作を開始するた
め、対応がされていない機械装置においては損傷
や操作員に危害を与えるという恐れがあつた。 Generally, the operation method for numerically controlled machine tools is usually manual mode using manual push button operation,
It has two types of automatic modes including numerical control tape. The manual mode is used when changing machining setups and preparing to cut the first item, while the automatic mode is used exclusively for mass production and continuous production. In machine tool processing factories, automatic mode operation occupies most of the operating time. If you operate the pushbutton switches for manual mode while driving in automatic mode, or if the pushbutton switches malfunction, even if you send a signal for manual mode, this will generally prevent or stop automatic operation. It is designed to be avoided. However, if the mode selection is switched from automatic mode to manual mode while the above-mentioned signal is still being sent, the control element that receives the signal for manual mode will immediately start its command operation, so the control element that does not respond to it will There was a risk of damage to the equipment or harm to the operator.
従つて本発明は自動モードから手動モードに切
換えた場合或る条件を満足しないときは手動モー
ドの実行を無効とするフエールセーフ回路を提供
しようとするものである。 Therefore, it is an object of the present invention to provide a fail-safe circuit that disables execution of the manual mode if a certain condition is not satisfied when switching from the automatic mode to the manual mode.
以下本発明の実施例を図面にもとづき説明す
る。PB１，PB２，PB３，PB４は手動モード用
の操作スイツチで各スイツチの出力は異常信号検
出回路１に入力されるとともにオアゲートOR１
に入力される。Ｓ１は手動モード選択スイツチ、
Ｓ２は自動モード選択スイツチである。１は手動
モード用の操作スイツチ群の手動モードに切換え
る時点の信号送出を検知する異常信号検出回路で
あり異常を検出すると出力が“１”から“０”に
変わる。そして異常信号検出回路１とオアゲート
OR１と手動モード選択スイツチＳ１との３つの
出力は手動モードゲート２の入力となる。該ゲー
ト２は手動モード選択スイツチＳ１に出力があり
且つ前記異常信号検出回路１の出力が“１”のと
きのみ前記OR１を通過して来る前記操作スイツ
チ群の出力を制御要素４に出力し手動モードの実
行を可能とする。また自動モード選択スイツチＳ
２に出力があるときのみ自動モードゲート４は自
動モード制御信号群の信号を出力して制御要素３
に自動モードを実行させる。 Embodiments of the present invention will be described below based on the drawings. PB1, PB2, PB3, and PB4 are operation switches for manual mode, and the output of each switch is input to abnormal signal detection circuit 1 and OR gate OR1.
is input. S1 is a manual mode selection switch,
S2 is an automatic mode selection switch. Reference numeral 1 denotes an abnormality signal detection circuit that detects the signal sent from the manual mode operation switch group at the time of switching to the manual mode, and when an abnormality is detected, the output changes from "1" to "0". And abnormal signal detection circuit 1 and OR gate
Three outputs from OR1 and manual mode selection switch S1 become inputs to manual mode gate 2. The gate 2 outputs the output of the operation switch group passing through the OR1 to the control element 4 only when the manual mode selection switch S1 has an output and the output of the abnormal signal detection circuit 1 is "1". mode can be executed. Also automatic mode selection switch S
The automatic mode gate 4 outputs signals of the automatic mode control signal group only when the control element 2 has an output.
to run in automatic mode.
異常信号検出回路１においては各操作スイツチ
PB１，PB２，PB３，PB４がそれぞれリレーＸ
１，Ｘ２，Ｘ３，Ｘ４を介して接地される。また
各操作スイツチの＋側には前記リレーＸ１，Ｘ
２，Ｘ３，Ｘ４のそれぞれのａ接点Ｘ１−a1，Ｘ
２−a1，Ｘ３−a1，Ｘ４−a1が並列に接続されリ
レーＹ１を介して接地される。更に前記スイツチ
の＋側にリレーＹ１のｂ接点Ｙ１−ｂ、手動モー
ド選択スイツチＳ１と連動のスイツチＳ１−１及
びリレーＺ１とが直列に接続されて接地され、リ
レーＺ１のａ接点Ｚ１−a1でホールドされる。更
にまた前記操作スイツチの＋側にはリレーＺ１の
ａ接点Ｚ１−a2が接続され、且つこの接点出力は
手動モードゲート２に出力される。 In the abnormal signal detection circuit 1, each operation switch
PB1, PB2, PB3, PB4 are each relay
1, X2, X3, and X4. In addition, the above-mentioned relays X1 and X are on the + side of each operation switch.
2, X3, X4 a contact X1-a 1 , X
2-a 1 , X3-a 1 , and X4-a 1 are connected in parallel and grounded via relay Y1. Further, to the + side of the switch, the b contact Y1-b of the relay Y1, the switch S1-1 interlocked with the manual mode selection switch S1, and the relay Z1 are connected in series and grounded, and the a contact Z1 -a of the relay Z1 is connected in series. is held. Furthermore, the a contact Z1- a2 of the relay Z1 is connected to the + side of the operating switch, and the output of this contact is output to the manual mode gate 2.
このように構成された本発明において自動モー
ド選択スイツチＳ２が選択され自動モードが実行
中において、操作スイツチPB１，PB２，PB３、
PB４の復帰ばねの折損、復帰機構への狭雑物の
混入若しくは導電性物質による接点短絡、或いは
配線経路での短絡事故の発生が考えられるが、た
またまPB１が復帰ばねの折損で導通したとする
と、リレーＸ１がオンしＸ１のａ接点Ｘ１−a1が
閉成されてリレーＹ１がオンされることによりＹ
１のｂ接点Ｙ１−ｂが開放される。この状態にお
いて手動モード選択スイツチＳ１が押され連動ス
イツチＳ１−１がオンされるがリレーＹ１のｂ接
点Ｙ１−ｂが開放しているためリレーＺ１が作動
せず、そのａ接点Ｚ１−a2は閉成されず手動モー
ドゲート２に出力されない。従つて手動モードゲ
ート２にはOR１と手動モード選択スイツチＳ１
からの出力があるものの制御要素４の手動モード
が実行されない。そこでPB１の導通の原因が除
かれればリレーＸ１はオンしないからリレーＹ１
はオンせずそのｂ接点Ｙ１−ｂは閉成した正常状
態に戻る。この状態で手動モードスイツチＳ１が
押されると連動したスイツチＳ１−１がオンしリ
レーＺ１がオンしてそのａ接点Ｚ１−a1はリレー
Ｙ１に関係なくホールド回路によつて閉成され
る。更にリレーＺ１のａ接点Ｚ１−a2も閉成され
て手動モードゲート２に出力されるものである。
なお異常信号検出回路１は本実施例に限定される
ものではなく同じ作用を有するものが自由に使用
できることは勿論である。 In the present invention configured as described above, when the automatic mode selection switch S2 is selected and the automatic mode is being executed, the operating switches PB1, PB2, PB3,
It is possible that the return spring of PB4 is broken, the contact is shorted due to foreign matter or conductive material in the return mechanism, or a short circuit occurs in the wiring route, but if PB1 happens to become conductive due to a breakage of the return spring. , relay X1 is turned on, a contact X1-a 1 of X1 is closed, and relay Y1 is turned on, so that Y
No. 1 b contact Y1-b is opened. In this state, the manual mode selection switch S1 is pressed and the interlocking switch S1-1 is turned on, but since the b contact Y1-b of relay Y1 is open, the relay Z1 does not operate, and its a contact Z1- a2 is It is not closed and is not output to manual mode gate 2. Therefore, manual mode gate 2 includes OR1 and manual mode selection switch S1.
Although there is an output from the control element 4, the manual mode of the control element 4 is not executed. Therefore, if the cause of conduction in PB1 is removed, relay X1 will not turn on, so relay Y1
is not turned on, and its b contact Y1-b returns to its normal state of being closed. When the manual mode switch S1 is pressed in this state, the linked switch S1-1 is turned on, the relay Z1 is turned on, and its a contact Z1- a1 is closed by the hold circuit regardless of the relay Y1. Further, the a contact Z1- a2 of the relay Z1 is also closed and output to the manual mode gate 2.
Note that the abnormal signal detection circuit 1 is not limited to this embodiment, and it goes without saying that any circuit having the same function can be used freely.
以上詳述したように本発明は操作スイツチ類の
手動モードに切換えた時点での信号送出を検地す
る回路を設けて手動モードに切換える場合に異常
があれば手動モードの実行を無効となしたので、
異常が発生していた場合の手動モード切換後に予
測される機械装置の損傷や操作員への危害を防止
することができ安全上極めて有効なものである。 As described in detail above, the present invention includes a circuit that detects the signal sent from the operating switches when switching to manual mode, and if there is an abnormality when switching to manual mode, the execution of manual mode is invalidated. ,
This is extremely effective in terms of safety because it can prevent damage to mechanical equipment and harm to operators that would be expected after switching to manual mode when an abnormality has occurred.
第１図は本発明の実施例のブロツク線図、第２
図は同じく異常信号検出回路の回路図である。
１……異常信号検出回路、２……手動モードゲ
ート、３……制御要素、PB１，PB２，PB３，
PB４……操作スイツチ、Ｘ１，Ｘ２，Ｘ３，Ｘ
４，Ｙ１，Ｚ１……リレー、OR１……オアゲー
ト。
FIG. 1 is a block diagram of an embodiment of the present invention, and FIG.
The figure is also a circuit diagram of the abnormal signal detection circuit. 1...Abnormal signal detection circuit, 2...Manual mode gate, 3...Control element, PB1, PB2, PB3,
PB4...Operating switch, X1, X2, X3, X
4, Y1, Z1...Relay, OR1...Or gate.
Claims (1)
機械において、手動モード用スイツチ群の異常信
号検出回路と、手動モード用スイツチ群の少くと
も１個がオンしたとき出力するORゲートと、手
動モード選択スイツチと、該手動モード選択スイ
ツチの出力と前記異常信号検出回路との出力があ
るときのみ前記ORゲートを通過して来る手動モ
ード用スイツチ群の出力を制御要素に出力する手
動モードゲートとを含んでなることを特徴とする
操作スイツチのフエールセーフ回路。1. In a machine that has manual mode operation and automatic mode operation, an abnormal signal detection circuit for the manual mode switch group, an OR gate that outputs when at least one of the manual mode switch group is turned on, and a manual mode selection switch and a manual mode gate that outputs the output of the manual mode switch group that passes through the OR gate to the control element only when there is an output of the manual mode selection switch and an output of the abnormal signal detection circuit. A fail-safe circuit for an operating switch characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11374182A JPS593601A (en) | 1982-06-30 | 1982-06-30 | Fail-safe circuit of operation switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11374182A JPS593601A (en) | 1982-06-30 | 1982-06-30 | Fail-safe circuit of operation switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS593601A JPS593601A (en) | 1984-01-10 |
| JPH0152761B2 true JPH0152761B2 (en) | 1989-11-10 |
Family
ID=14619949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11374182A Granted JPS593601A (en) | 1982-06-30 | 1982-06-30 | Fail-safe circuit of operation switch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS593601A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0195306A (en) * | 1987-10-07 | 1989-04-13 | Fanuc Ltd | Emergency stop control circuit |
-
1982
- 1982-06-30 JP JP11374182A patent/JPS593601A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS593601A (en) | 1984-01-10 |
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