JPH09101331A - Insulation checker - Google Patents
Insulation checkerInfo
- Publication number
- JPH09101331A JPH09101331A JP28684495A JP28684495A JPH09101331A JP H09101331 A JPH09101331 A JP H09101331A JP 28684495 A JP28684495 A JP 28684495A JP 28684495 A JP28684495 A JP 28684495A JP H09101331 A JPH09101331 A JP H09101331A
- Authority
- JP
- Japan
- Prior art keywords
- insulation
- checker
- power tool
- alarm device
- power
- 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.)
- Pending
Links
Landscapes
- Measurement Of Resistance Or Impedance (AREA)
Abstract
(57)【要約】
【課題】 小型で、安価で、測定が容易で、而も電池切
れの心配なしに確実に絶縁異常が確認できる絶縁チェッ
カーを提供する。
【解決手段】 電動工具６を使用する前に、電動工具６
の非充電金属部６ａをアース端子８に接続し、電源コン
セント２と、絶縁状態監視回路３である零相変流器ＺＣ
Ｔ及びアンプＡＭＰと、警報装置４である発光ダイオー
ドＬＥＤ及びブザーＢＺとをケース５内に具備した絶縁
チェッカー１を用いて絶縁異常を確認する。
(57) Abstract: To provide an insulation checker which is small in size, inexpensive, easy to measure, and capable of surely confirming an insulation abnormality without worrying about battery exhaustion. SOLUTION: Before using the power tool 6, the power tool 6
The non-charged metal part 6a is connected to the ground terminal 8, and the power outlet 2 and the zero-phase current transformer ZC which is the insulation state monitoring circuit 3 are connected.
The insulation abnormality is confirmed using the insulation checker 1 including the T and the amplifier AMP, and the light emitting diode LED and the buzzer BZ as the alarm device 4 in the case 5.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電動工具の絶縁状
態を検査するための絶縁チェッカーの改善に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an insulation checker for inspecting the insulation state of a power tool.
【０００２】[0002]
【従来の技術】工事現場等で使用する電動工具は、老朽
化や故障により絶縁破壊が発生することがあり、それを
知らずに使用すると重大事故につながることがあった。
この事故を防ぐために、従来、電動工具を使用する前に
電動工具の絶縁状態を絶縁抵抗器やテスター等を用いて
検査して、絶縁破壊等の絶縁異常がないことを確かめて
から使用していた。2. Description of the Related Art A power tool used at a construction site or the like may cause dielectric breakdown due to deterioration or failure, and if it is used without knowing it, it may lead to a serious accident.
In order to prevent this accident, conventionally, before using the power tool, the insulation state of the power tool is inspected using an insulation resistor or a tester, etc., and it is used after confirming that there is no insulation abnormality such as insulation breakdown. It was
【０００３】[0003]
【発明が解決しようとする課題】しかしながら上記従来
の絶縁抵抗器やテスター等の絶縁抵抗測定手段は、絶縁
抵抗を測定するための電動工具のある現場に常備してお
く必要があり、高価であると共に、測定が煩わしく、ま
た電池が切れると使えなくという欠点があった。However, the above-mentioned conventional insulation resistance measuring means such as an insulation resistor and a tester must be always provided at the site where the electric tool for measuring the insulation resistance is provided, which is expensive. At the same time, there is a drawback that the measurement is troublesome and that the battery cannot be used when the battery runs out.
【０００４】[0004]
【課題を解決するための手段】上記従来の絶縁抵抗測定
器の問題点に鑑み、本発明は、小型で、安価で、測定が
容易で、而も電池切れの心配なしに確実に絶縁異常が確
認できる絶縁チェッカーを提供するもので、電源コンセ
ントと、絶縁状態監視回路と、警報装置とをケース内に
具備し、前記電源コンセントに電動工具の電源プラグを
差込み、電動工具の非充電金属部をアース端子に接続
し、絶縁状態を前記絶縁状態監視回路で監視し、絶縁異
常が確認されたときには信号の出力により、前記警報装
置を動作させることである。SUMMARY OF THE INVENTION In view of the above problems of the conventional insulation resistance measuring device, the present invention is small, inexpensive, easy to measure, and surely prevents an abnormality in insulation without running out of battery. It provides a checker for insulation, which includes a power outlet, an insulation state monitoring circuit, and an alarm device in a case. The alarm device is connected to a ground terminal, the insulation state is monitored by the insulation state monitoring circuit, and when an insulation abnormality is confirmed, a signal is output to operate the alarm device.
【０００５】[0005]
【発明の実施の形態】電動工具を使用する前に、絶縁チ
ェッカーの電源コンセントに電動工具の電源プラグを差
込み、電動工具の非充電金属部をアース端子に接続し、
絶縁状態を絶縁状態監視回路で監視し、絶縁破壊等の絶
縁異常が確認されたときには信号の出力により、警報装
置を動作させる。BEST MODE FOR CARRYING OUT THE INVENTION Before using a power tool, insert a power plug of the power tool into a power outlet of an insulation checker, connect an uncharged metal part of the power tool to a ground terminal,
The insulation state is monitored by the insulation state monitoring circuit, and when an insulation abnormality such as insulation breakdown is confirmed, the alarm device is operated by outputting a signal.
【０００６】[0006]
【実施例】図１及び図２は本発明に係る絶縁チェッカー
の一実施例の説明図である。以下これらの図面に基づき
本発明を説明する。1 and 2 are explanatory views of an embodiment of an insulation checker according to the present invention. Hereinafter, the present invention will be described with reference to these drawings.
【０００７】絶縁チェッカー１は、電源コンセント２
と、絶縁状態監視回路３である零相変流器ＺＣＴ及びア
ンプＡＭＰと、警報装置４である発光ダイオードＬＥＤ
及びブザーＢＺとをケース５内に具備する。The insulation checker 1 includes a power outlet 2
And a zero-phase current transformer ZCT and an amplifier AMP, which are insulation state monitoring circuits 3, and a light emitting diode LED, which is an alarm device 4.
And a buzzer BZ in the case 5.
【０００８】電動工具６を使用する前に、絶縁チェッカ
ー１の電源コンセント２に電動工具６の電源プラグ７を
差込み、電動工具６の非充電金属部６ａをアース端子８
に接続し、絶縁状態を絶縁状態監視回路３で監視し、絶
縁異常が確認されたときには信号の出力により、警報装
置４を動作させる。Before using the power tool 6, the power plug 7 of the power tool 6 is inserted into the power outlet 2 of the insulation checker 1, and the non-charged metal portion 6a of the power tool 6 is grounded to the ground terminal 8
And the insulation state is monitored by the insulation state monitoring circuit 3, and when an insulation abnormality is confirmed, the alarm device 4 is operated by outputting a signal.
【０００９】尚、絶縁状態監視回路３は、本実施例では
零相変流器ＺＣＴ及びアンプＡＭＰを用いたがこれに限
定されるものではなく、本発明の主旨を逸脱しない範囲
で適宜変更可能である。Although the insulation state monitoring circuit 3 uses the zero-phase current transformer ZCT and the amplifier AMP in the present embodiment, the insulation state monitoring circuit 3 is not limited to this and can be appropriately changed without departing from the gist of the present invention. Is.
【００１０】また、警報装置４は、本実施令では発光ダ
イオードＬＥＤの点灯及びブザーＢＺの鳴動を用いた
が、これに限定されるものではなく、本発明の主旨を逸
脱しない範囲で適宜変更可能である。Further, the alarm device 4 uses the lighting of the light emitting diode LED and the ringing of the buzzer BZ in this embodiment, but the alarm device 4 is not limited to this, and can be appropriately changed without departing from the gist of the present invention. Is.
【００１１】[0011]
【発明の効果】本発明に係る絶縁チェッカーは、電源コ
ンセントと、絶縁状態監視回路と、警報装置とをケース
内に具備し、前記電源コンセントに電動工具の電源プラ
グを差込み、電動工具の非充電金属部をアース端子に接
続し、絶縁状態を前記絶縁状態監視回路で監視し、絶縁
異常が確認されたときには信号の出力により、前記警報
装置を動作させることによって、小型で、安価で、測定
が容易で、而も電池切れの心配なしに、確実に絶縁破壊
等の絶縁異常が確認できるので、重大事故を未然に防ぐ
ことができるという効果がある。The insulation checker according to the present invention comprises a power outlet, an insulation state monitoring circuit, and an alarm device in a case, and the power plug of the power tool is inserted into the power outlet to charge the power tool. By connecting the metal part to the ground terminal, monitoring the insulation state with the insulation state monitoring circuit, and when an insulation abnormality is confirmed, by operating the alarm device by the output of a signal, it is small, inexpensive, and measurement is possible. Since it is easy and the insulation abnormality such as insulation breakdown can be surely confirmed without worrying about the battery running out, there is an effect that a serious accident can be prevented.
【図１】本発明に係る絶縁チェッカーの一実施例の説明
図である。FIG. 1 is an explanatory diagram of an embodiment of an insulation checker according to the present invention.
【図２】図１の絶縁チェッカーの要部説明図である。FIG. 2 is an explanatory view of a main part of the insulation checker of FIG.
１・・・絶縁チェッカー、２・・・電源コンセント、３
・・・絶縁状態監視回路、４・・・警報装置、５・・・
ケース、６・・・電動工具、６ａ・・・非充電金属部、
７・・・電源プラグ、８・・・アース端子1 ... Insulation checker, 2 ... Power outlet, 3
... Insulation status monitoring circuit, 4 ... Alarm device, 5 ...
Case, 6 ... Power tool, 6a ... Uncharged metal part,
7 ... Power plug, 8 ... Ground terminal
Claims (1)
縁チェッカーであって、電源コンセントと、絶縁状態監
視回路と、警報装置とをケース内に具備し、前記電源コ
ンセントに電動工具の電源プラグを差込み、電動工具の
非充電金属部をアース端子に接続し、絶縁状態を前記絶
縁状態監視回路で監視し、絶縁異常が確認されたときに
は信号の出力により、前記警報装置を動作させることを
特徴とする絶縁チェッカー。1. An insulation checker for inspecting the insulation state of a power tool, comprising a power outlet, an insulation state monitoring circuit, and an alarm device in a case, and the power outlet has a power plug for the power tool. Is inserted, the non-charged metal part of the power tool is connected to the ground terminal, the insulation state is monitored by the insulation state monitoring circuit, and when an insulation abnormality is confirmed, a signal is output to operate the alarm device. And an insulation checker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28684495A JPH09101331A (en) | 1995-10-06 | 1995-10-06 | Insulation checker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28684495A JPH09101331A (en) | 1995-10-06 | 1995-10-06 | Insulation checker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09101331A true JPH09101331A (en) | 1997-04-15 |
Family
ID=17709769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28684495A Pending JPH09101331A (en) | 1995-10-06 | 1995-10-06 | Insulation checker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09101331A (en) |
-
1995
- 1995-10-06 JP JP28684495A patent/JPH09101331A/en active Pending
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