JP2006159303A - Emergency stop device for machine tool - Google Patents

Emergency stop device for machine tool Download PDF

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JP2006159303A
JP2006159303A JP2004349849A JP2004349849A JP2006159303A JP 2006159303 A JP2006159303 A JP 2006159303A JP 2004349849 A JP2004349849 A JP 2004349849A JP 2004349849 A JP2004349849 A JP 2004349849A JP 2006159303 A JP2006159303 A JP 2006159303A
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emergency stop
keys
machine tool
operation panel
stop switch
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JP2004349849A
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Japanese (ja)
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Koichi Wakasugi
康一 若杉
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Yaskawa Electric Corp
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Yaskawa Electric Corp
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Priority to JP2004349849A priority Critical patent/JP2006159303A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To obtain a device capable of surely urgently stopping a machine tool even when an operator can not find a place of an emergency stop switch. <P>SOLUTION: The emergency stop device is provided with a machine operation panel 2, which has the emergency stop switch 3 and a servo power supply breaker 4 for stopping the machine tool 1 by a command from the switch 3, an NC operation panel 5 including operation keys 6, and a simultaneous depression detecting circuit 8 for operating the servo power supply breaker 4 by the simultaneous depression of two or more keys in the operation keys 6 in addition to the emergency stop switch 3. The height of at least two keys in the operation keys can be made higher than that of the other keys. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、工作機械を非常停止させる非常停止装置に関する。   The present invention relates to an emergency stop device that makes a machine tool perform an emergency stop.

従来の工作機械の非常停止装置として図６に示すようなものがある。図６は制御部を示すブロック図である。図において、１は工作機械、２は機械操作パネル、３は非常停止スイッチ、４はサーボ電源遮断器、５はＮＣ操作パネル、６は操作キー、７はキー読取回路、９はＮＣ制御装置である。工作機械１は旋盤やマシニングセンタといった工作機械である。
工作機械１には機械操作パネル２およびＮＣ操作パネル５が設けられている。工作機械を操作するオペレータが危険を感じたときは機械操作パネル２に取り付けられている非常停止スイッチ３を押すことにより工作機械１を非常停止していた。
また、従来の他の技術として、複数の操作キーが同時に押圧操作されたときに単独の操作キーに割り当てられた機能とは別の機能を実行する発明もある（特許文献１参照）。この技術ではＣＰＵ（機能処理部）によりソフトウェアにて操作キーの同時押しを検出するため、安全上、非常停止手段として適用することができない。
特開平１１−６５７４１号公報（第５頁、図１） A conventional emergency stop device for a machine tool is shown in FIG. FIG. 6 is a block diagram showing the control unit. In the figure, 1 is a machine tool, 2 is a machine operation panel, 3 is an emergency stop switch, 4 is a servo power circuit breaker, 5 is an NC operation panel, 6 is an operation key, 7 is a key reading circuit, and 9 is an NC controller. is there. The machine tool 1 is a machine tool such as a lathe or a machining center.
The machine tool 1 is provided with a machine operation panel 2 and an NC operation panel 5. When an operator operating the machine tool felt danger, the machine tool 1 was stopped by pressing an emergency stop switch 3 attached to the machine operation panel 2.
As another conventional technique, there is also an invention that executes a function different from the function assigned to a single operation key when a plurality of operation keys are simultaneously pressed (see Patent Document 1). In this technique, since simultaneous pressing of operation keys is detected by software by a CPU (function processing unit), it cannot be applied as an emergency stop means for safety.
JP-A-11-65741 (5th page, FIG. 1)

ところが、従来の工作機械の非常停止装置では、オペレータがあわてた場合は非常停止スイッチを確実に押すことができない問題や、オペレータの姿勢によっては工作機械の機械操作パネルにある非常停止スイッチが見えず、この場合も非常停止スイッチを確実に押すことができない問題があった。
本発明はこのような問題点に鑑みてなされたものであり、確実に非常停止ができる工作機械の非常停止装置を提供することを目的とする。 However, with the conventional emergency stop device for machine tools, if the operator panics, the emergency stop switch cannot be pressed reliably, and depending on the operator's posture, the emergency stop switch on the machine operation panel of the machine tool cannot be seen. Also in this case, there was a problem that the emergency stop switch could not be pressed reliably.
The present invention has been made in view of such problems, and an object thereof is to provide an emergency stop device for a machine tool that can surely perform an emergency stop.

上記問題を解決するため、本発明は、次のように構成したものである。
請求項１に記載の発明は、非常停止スイッチとこの指令により工作機械を停止させるサーボ電源遮断器とを有する機械操作パネルと、操作キーを含むＮＣ操作パネルとを備えた工作機械の非常停止装置において、前記非常停止スイッチに加え前記操作キーの２つ以上のキーを同時に押すことにより前記サーボ電源遮断器を動作させる同時押し検出回路を設けたものである。
請求項２に記載の発明は、前記操作キーのうち少なくとも２個のキーの高さを、他のキーより高くしたものである。 In order to solve the above problems, the present invention is configured as follows.
The invention according to claim 1 is an emergency stop device for a machine tool comprising a machine operation panel having an emergency stop switch and a servo power circuit breaker for stopping the machine tool by this command, and an NC operation panel including operation keys. In addition, in addition to the emergency stop switch, a simultaneous pressing detection circuit for operating the servo power circuit breaker by simultaneously pressing two or more keys of the operation keys is provided.
According to a second aspect of the present invention, at least two of the operation keys are higher than other keys.

本発明によれば、ＮＣ操作パネルに同時押し検出回路を設け操作キーに非常停止機能をもたせたので、非常停止スイッチの場所がわからない時でも、ＮＣ操作パネルの操作キーにより、容易に素早く、確実に工作機械を非常停止することができる。また、任意の特定キーだけ盛り上げる構造としたので、回路の簡素化が行え、コストダウンにつながる。   According to the present invention, the simultaneous operation detection circuit is provided on the NC operation panel so that the operation key has an emergency stop function. Therefore, even when the location of the emergency stop switch is unknown, the operation key on the NC operation panel can be used easily, quickly and reliably. The machine tool can be emergency stopped. In addition, since the structure is such that only a specific key is raised, the circuit can be simplified and the cost can be reduced.

以下、本発明の実施の形態について図を参照して説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１は、本発明の非常停止装置を適用した工作機械の斜視図、図２はそのブロック図である。図において、８は同時押し検出回路である。他の符号は従来と同じであるため、説明を省略する。
機械操作パネル２はオペレータが機械を非常停止するときに押す非常停止スイッチ３と、非常停止スイッチ３の操作により工作機械１の電源を遮断するサーボ電源遮断４とを備える。ＮＣ操作パネル５は操作キー６と、押された操作キー６の内容を判別するためのキー読取回路７と、２つ以上の操作キーが同時に押下されたことを検出する同時押し検出回路８を備える。ＮＣ制御装置９はＮＣ操作パネル５のキー読取回路７からの指令により工作機械１を制御させるものである。ＮＣ操作パネル５および機械操作パネル２は工作機械１の筐体または近傍に設置される。
本発明が従来の非常停止装置あるいは特許文献１と異なる部分は、ＮＣ操作パネルの操作キーの同時押しをハードウェアにて検出する手段をＮＣ操作パネル内部に備え、工作機械を非常停止する部分である。 FIG. 1 is a perspective view of a machine tool to which the emergency stop device of the present invention is applied, and FIG. 2 is a block diagram thereof. In the figure, 8 is a simultaneous pressing detection circuit. Other reference numerals are the same as those in the prior art, and thus description thereof is omitted.
The machine operation panel 2 includes an emergency stop switch 3 that is pressed when the operator makes an emergency stop of the machine, and a servo power cutoff 4 that shuts off the power of the machine tool 1 by operating the emergency stop switch 3. The NC operation panel 5 includes an operation key 6, a key reading circuit 7 for determining the content of the pressed operation key 6, and a simultaneous press detection circuit 8 for detecting that two or more operation keys are pressed simultaneously. Prepare. The NC control device 9 controls the machine tool 1 according to a command from the key reading circuit 7 of the NC operation panel 5. The NC operation panel 5 and the machine operation panel 2 are installed in or near the housing of the machine tool 1.
The part where the present invention differs from the conventional emergency stop device or Patent Document 1 is a part in which a means for detecting simultaneous pressing of the operation keys of the NC operation panel by hardware is provided in the NC operation panel and the machine tool is emergency stopped. is there.

本発明の操作キー６の部分拡大したものを図３に示す。図４は図３の操作キーと同時押し検出を説明する回路図である。図において、６ａ〜６ｉは個々の操作キーであり、ＮＣ操作パネルに設けられた多数のキーの一部を抜き出したものである。８１ａ、８１ｂ、８１ｃはカラム線、８２ａ、８２ｂ、８２ｃはスキャン線、８３ａ、８３ｂはＡＮＤゲート、８４ａは非常停止出力線、８４ｂは出力線である。
操作キー６の中で、よく使用する操作キー（ＰＲＯＧ）６ａと操作キー（Ｅ）６ｃを他の操作キーより盛り上げておく。 FIG. 3 shows an enlarged part of the operation key 6 of the present invention. FIG. 4 is a circuit diagram for explaining the operation key and simultaneous pressing detection of FIG. In the figure, reference numerals 6a to 6i denote individual operation keys, which are obtained by extracting some of the many keys provided on the NC operation panel. 81a, 81b and 81c are column lines, 82a, 82b and 82c are scan lines, 83a and 83b are AND gates, 84a is an emergency stop output line, and 84b is an output line.
Of the operation keys 6, frequently used operation keys (PROG) 6a and operation keys (E) 6c are raised above the other operation keys.

つぎに、本実施例の動作について説明する。
図５は、本発明の使用形態を示す説明図である。ＮＣ操作パネル５には複数の押しボタンからなる操作キー６を備え、通常はＮＣ制御装置の操作手段として使用される。
カラム線８１ａ、８１ｂ、８１ｃに対して一定の周期で電圧を印加しているので、そのタイミングでスキャン線８２ａ、８２ｂ、８２ｃに電圧が出ているかどうか、すなわち、どの操作キーが押されたかどうかが検出できる。
いま、異常が生じて非常停止が必要になり、手のひらにより、操作キー６ａと操作キー６ｃが同時に押されたとする。
カラム線８１ａに電圧を印加したときにスキャン線８２ａおよびスキャン線８２ｃに電圧が発生するため、ＡＮＤゲート８３ａの条件が成立し、出力線８４ａが有効になり、操作キー６の同時押し検出ができる。しかしながら、これでは操作キー６ｇと操作キー６ｉが同時に押された場合にもカラム線８１ｃに電圧を印加したときにＡＮＤゲート８３ａの条件が成立するため、操作キー６ａと操作キー６ｃの同時押し検出に限定する場合はＡＮＤゲート８３ｂによりカラム線８１ａに電圧が印加されている条件で非常停止出力８４ｂが有効となる。これにより図１の同時押し検出回路８よりサーボ電源遮断器４が可能となる。
また、カラム線８１ｃに電圧が印加されているタイミングでスキャン線８２ａに電圧が出た状態では、操作キー６ｇが押されていることになる。
なお、本実施例では、図５のように操作キー６を手のひらで押しているが、手は握っていても良い。 Next, the operation of this embodiment will be described.
FIG. 5 is an explanatory diagram showing a usage pattern of the present invention. The NC operation panel 5 is provided with operation keys 6 composed of a plurality of push buttons, and is normally used as operation means of the NC control device.
Since a voltage is applied to the column lines 81a, 81b, 81c at a constant period, whether or not a voltage is output to the scan lines 82a, 82b, 82c at that timing, that is, which operation key is pressed. Can be detected.
Now, it is assumed that an emergency occurs and an emergency stop is required, and the operation key 6a and the operation key 6c are simultaneously pressed by the palm.
When a voltage is applied to the column line 81a, a voltage is generated in the scan line 82a and the scan line 82c. Therefore, the condition of the AND gate 83a is satisfied, the output line 84a is enabled, and simultaneous pressing of the operation keys 6 can be detected. . However, in this case, even when the operation key 6g and the operation key 6i are pressed at the same time, the condition of the AND gate 83a is satisfied when a voltage is applied to the column line 81c. Therefore, simultaneous detection of the operation key 6a and the operation key 6c is detected. The emergency stop output 84b is valid under the condition that a voltage is applied to the column line 81a by the AND gate 83b. Thus, the servo power circuit breaker 4 can be realized by the simultaneous push detection circuit 8 of FIG.
When the voltage is applied to the scan line 82a at the timing when the voltage is applied to the column line 81c, the operation key 6g is pressed.
In this embodiment, the operation key 6 is pushed with the palm as shown in FIG. 5, but the hand may be held.

本発明の非常停止装置を適用した工作機械を示す斜視図The perspective view which shows the machine tool to which the emergency stop apparatus of this invention is applied. 図１の非常停止装置の構成を示すブロック図The block diagram which shows the structure of the emergency stop apparatus of FIG. 本発明の操作キーを示す部分拡大斜視図The partial expansion perspective view which shows the operation key of this invention 本発明の操作キーの同時押し検出を示す回路図The circuit diagram which shows the simultaneous press detection of the operation key of this invention 本発明の使用形態を示す説明図Explanatory drawing which shows the usage pattern of this invention 従来の非常停止装置を示すブロック図Block diagram showing a conventional emergency stop device

符号の説明Explanation of symbols

１ 工作機械
２ 機械操作パネル
３ 非常停止スイッチ
４ サーボ電源遮断器
５ ＮＣ操作パネル
６、６ａ、６ｂ、６ｃ、６ｄ、６ｅ、６ｆ、６ｇ、６ｈ、６ｉ 操作キー
７ キー読取回路
８ 同時押し検出回路
８１ａ、８１ｂ、８１ｃ カラム線
８２ａ、８２ｂ、８２ｃ スキャン線
８３ａ、８３ｂ ＡＮＤゲート
８４ａ 非常停止出力線
８４ｂ 出力線
９ ＮＣ制御装置 DESCRIPTION OF SYMBOLS 1 Machine tool 2 Machine operation panel 3 Emergency stop switch 4 Servo power supply circuit breaker 5 NC operation panel 6, 6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h, 6i Operation key 7 Key reading circuit 8 Simultaneous press detection circuit 81a, 81b, 81c Column lines 82a, 82b, 82c Scan lines 83a, 83b AND gate 84a Emergency stop output line 84b Output line 9 NC controller

Claims (2)

非常停止スイッチとこの指令により工作機械を停止させるサーボ電源遮断器とを有する機械操作パネルと、操作キーを含むＮＣ操作パネルとを備えた工作機械の非常停止装置において、
前記非常停止スイッチに加え前記操作キーの２つ以上のキーを同時に押すことにより前記サーボ電源遮断器を動作させる同時押し検出回路を設けたことを特徴とする工作機械の非常停止装置。 In an emergency stop device for a machine tool comprising a machine operation panel having an emergency stop switch and a servo power circuit breaker for stopping the machine tool by this command, and an NC operation panel including operation keys.
An emergency stop device for a machine tool, comprising a simultaneous pressing detection circuit for operating the servo power circuit breaker by simultaneously pressing two or more keys of the operation keys in addition to the emergency stop switch. 前記操作キーのうち少なくとも２個のキーの高さを、他のキーより高くしたことを特徴とする請求項１記載の工作機械の非常停止装置。   2. The emergency stop device for a machine tool according to claim 1, wherein at least two keys among the operation keys are set higher than other keys.
JP2004349849A 2004-12-02 2004-12-02 Emergency stop device for machine tool Pending JP2006159303A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7447458B2 (en) * 2004-12-20 2008-11-04 Sharp Kabushiki Kaisha Operation panel and image forming apparatus
WO2012111164A1 (en) * 2011-02-14 2012-08-23 株式会社牧野フライス製作所 Machine tool
JP2021030398A (en) * 2019-08-28 2021-03-01 日東工器株式会社 Portable machine tool

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7447458B2 (en) * 2004-12-20 2008-11-04 Sharp Kabushiki Kaisha Operation panel and image forming apparatus
WO2012111164A1 (en) * 2011-02-14 2012-08-23 株式会社牧野フライス製作所 Machine tool
EP2676769A1 (en) * 2011-02-14 2013-12-25 Makino Milling Machine Co., Ltd. Machine tool
EP2676769A4 (en) * 2011-02-14 2014-10-29 Makino Milling Machine Machine tool
JP2021030398A (en) * 2019-08-28 2021-03-01 日東工器株式会社 Portable machine tool
JP7261698B2 (en) 2019-08-28 2023-04-20 日東工器株式会社 Portable machine tool

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