JP6488344B1 - Leak current meter - Google Patents

Leak current meter Download PDF

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JP6488344B1
JP6488344B1 JP2017185282A JP2017185282A JP6488344B1 JP 6488344 B1 JP6488344 B1 JP 6488344B1 JP 2017185282 A JP2017185282 A JP 2017185282A JP 2017185282 A JP2017185282 A JP 2017185282A JP 6488344 B1 JP6488344 B1 JP 6488344B1
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sliding
leakage
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ammeter
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JP2019060712A (en
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義博 首藤
義博 首藤
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一般財団法人九州電気保安協会
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Abstract

【課題】漏洩電流の測定作業を簡単かつ短時間に行えるようにすること、既製の漏れ電流計を利用すること、高所にある引込線の漏れ電流を容易に測定できるようにすること、クランプ部が閉じた状態からでも引込線をクランプ部内に挿入できるようにすること。【解決手段】本体部の上端にクランプ部3、4を有する漏れ電流計、クランプ部3に装着可能な従動部12、本体部の下端側に装着可能な筐体5、筐体5に対して上下方向の所定範囲で摺動可能な摺動部9、摺動部9を下方向に付勢する弾性部材10、摺動部9の上方向への摺動に連動して従動部12をクランプ部3が閉じる方向に移動させるロッド部11、摺動部9の下端部に設けた連結部22及びクランプ部3、4の先端に装着された挿入補助部24、25を備える高所用漏れ電流計。【選択図】図2Leakage current measurement work can be performed easily and in a short time, an off-the-shelf leakage ammeter can be used, a leakage current of a lead-in wire at a high place can be easily measured, a clamp portion The lead-in wire should be able to be inserted into the clamp part even when is closed. A leakage ammeter having clamp portions 3 and 4 at the upper end of a main body portion, a follower portion 12 that can be attached to the clamp portion 3, a housing 5 that can be attached to the lower end side of the main body portion, and a housing 5 Sliding part 9 that can slide within a predetermined range in the vertical direction, elastic member 10 that urges sliding part 9 downward, and clamped driven part 12 in conjunction with sliding upward of sliding part 9 Leakage ammeter for high places provided with a rod part 11 for moving the part 3 in the closing direction, a connecting part 22 provided at the lower end part of the sliding part 9 and insertion auxiliary parts 24 and 25 attached to the tips of the clamp parts 3 and 4 . [Selection] Figure 2

Description

本発明は、漏れ電流計に関し、特に、頭上1〜4m程度の高所にある低圧引込線の漏れ電流を測定するのに適しているクランプ型の漏れ電流計に関する。   The present invention relates to a leakage ammeter, and more particularly to a clamp-type leakage ammeter suitable for measuring a leakage current of a low-voltage lead-in wire at a height of about 1 to 4 m above the head.

一般用電気工作物の調査は、電気事業法第57条及び同法第92条に規定する調査のうち、同法施行規則第96条の規定により4年に1回以上行う調査(定期調査)を適切に実施するため、基本的な要件及び標準的な調査項目が定められている。
その標準的な調査項目のひとつである分電盤における調査の1項目として、分電盤内等の測定可能な箇所において漏れ電流計による漏洩電流の測定を行うことが定められ、また、需要家不在時における調査の1項目として、屋外の測定可能な場所において漏れ電流計による電路の絶縁状態の確認を行うことが定められている。
しかし、特に屋外の測定可能な場所にある低圧引込線は、電気設備技術基準・解釈第116条で「家屋側:地表上2.5m以上」、「道路横断:地表上5m以上」と規定されていることから、頭上1〜4mの高さにある場合が多く、作業が大がかりになる、測定がしにくいといった問題があった。
Surveys on general electric works are conducted at least once every four years in accordance with Article 96 of the Enforcement Regulations of the Electricity Business Act Article 57 and Article 92 of the Act (Regular Survey) Basic requirements and standard survey items have been established in order to properly implement this.
As one of the standard survey items in the distribution panel, it is stipulated to measure leakage current with a leakage ammeter at a measurable location in the distribution panel. As one item of the investigation in the absence, it is stipulated that the insulation state of the electric circuit is confirmed by a leak ammeter at a place where it can be measured outdoors.
However, the low-voltage lead-in wire, especially in places that can be measured outdoors, is stipulated in Article 116 of the Electrical Equipment Technical Standards and Interpretation as “House side: 2.5 m or more on the ground surface” and “Road crossing: 5 m or more on the ground surface”. Therefore, there are many cases where the height is 1 to 4 m above the head, and there is a problem that the work becomes large and measurement is difficult.

このような問題を解決するため、特許文献1(特開2009−118586号公報)には、クランプ式電流計(10)を収納するための絶縁容器(22)、絶縁容器(22)を支持する絶縁操作棒(24)、絶縁容器(22)の一側面に取り付けられているロック用絶縁板(26)、スペーサ(27)及び絶縁容器(22)の他側面に取り付けられているロック解除用絶縁板(28)等を備える間接活線工具(20)が記載されている。
この間接活線工具(20)を用いてクランプ式電流計(10)を高圧活線Aに取り付けるための作業工程は次のとおりである。
(1)絶縁容器(22)にクランプ式電流計(10)を収納しロック機構(16)を手動で解除する。
(2)スペーサ(27)をCTクランプ(12a)(12b)の間に挟み込む(図3参照)。
(3)絶縁操作棒(24)を操作してクランプ式電流計(10)を高圧活線Aに近づけ、スペーサ(27)によって開いた状態のCTクランプ(12a)(12b)に生じた空隙より高圧活線Aを挿入する(図4参照)。
(4)スペーサ(27)の湾曲部を高圧活線Aに押し当てる。するとスペーサ(27)が外れ、ばね力による付勢によってCTクランプ(12a)(12b)が閉じた状態となる(図6参照)。
(5)絶縁操作棒(24)を操作して絶縁容器(22)を高圧活線Aに近づける。すると摺動部(16a)はロック用絶縁板(26)により押し上げられ、CTクランプ(12a)(12b)が閉じた状態に固定される(図6参照)。
(6)絶縁操作棒(24)を操作して絶縁容器(22)を高圧活線Aから遠ざける。するとクランプ式電流計(10)から絶縁容器(22)が外れる。
In order to solve such a problem, Patent Document 1 (Japanese Unexamined Patent Application Publication No. 2009-118586) supports an insulating container (22) and an insulating container (22) for housing a clamp-type ammeter (10). Insulation operation rod (24), lock insulation plate (26) attached to one side of the insulation vessel (22), spacer (27) and lock release insulation attached to the other side of the insulation vessel (22) An indirect hot wire tool (20) provided with a plate (28) and the like is described.
The work process for attaching the clamp-type ammeter (10) to the high-voltage hot wire A using the indirect hot wire tool (20) is as follows.
(1) Store the clamp-type ammeter (10) in the insulating container (22) and manually release the lock mechanism (16).
(2) The spacer (27) is sandwiched between the CT clamps (12a) and (12b) (see FIG. 3).
(3) Operate the insulation operating rod (24) to bring the clamp-type ammeter (10) closer to the high-voltage live wire A and from the gap generated in the CT clamps (12a) and (12b) opened by the spacer (27) The high-pressure live wire A is inserted (see FIG. 4).
(4) The curved portion of the spacer (27) is pressed against the high-pressure live wire A. Then, the spacer (27) is detached, and the CT clamps (12a) and (12b) are closed by the biasing force by the spring force (see FIG. 6).
(5) The insulating operation rod (24) is operated to bring the insulating container (22) closer to the high-pressure hot wire A. Then, the sliding portion (16a) is pushed up by the lock insulating plate (26), and the CT clamps (12a) and (12b) are fixed in a closed state (see FIG. 6).
(6) The insulating operation rod (24) is operated to move the insulating container (22) away from the high-pressure live line A. Then, the insulating container (22) is detached from the clamp type ammeter (10).

また、間接活線工具(20)を用いてクランプ式電流計(10)を高圧活線Aから取り外すための作業工程は次のとおりである。
(7)絶縁容器(22)にクランプ式電流計(10)を収納し、ロック解除用絶縁板(28)の先端にあるU字部(281)を摺動部(16a)の突起部(16c)に引っ掛ける(図7参照)。
(8)絶縁操作棒(24)を操作して絶縁容器(22)を高圧活線Aから遠ざける。すると突起部(16c)はロック解除用絶縁板(28)によって下向きに押し下げられ、CTクランプ(12a)(12b)が開く(図8を参照)。
(9)絶縁操作棒(24)を操作して絶縁容器(22)を高圧活線Aからさらに遠ざける。するとCTクランプ(12a)(12b)は高圧活線Aから離れ、同時にばね力による付勢によって閉まる(図9参照)。
しかし、特許文献1に記載の間接活線工具(20)は、スペーサ(27)をCTクランプ(12a)(12b)の間に挟み込む作業、クランプ式電流計(10)を高圧活線Aに取り付けた後に絶縁容器(22)を外す作業、クランプ式電流計(10)を高圧活線Aから取り外す際に絶縁容器(22)を収納しロック解除用絶縁板(28)を突起部(16c)に引っ掛ける作業等があり、取り扱いを覚えにくく作業に時間がかかるという問題があった。
The work process for removing the clamp-type ammeter (10) from the high-voltage hot wire A using the indirect hot wire tool (20) is as follows.
(7) The clamp-type ammeter (10) is housed in the insulating container (22), and the U-shaped part (281) at the tip of the unlocking insulating plate (28) is connected to the protrusion (16c) of the sliding part (16a). ) (See FIG. 7).
(8) The insulating operation rod (24) is operated to move the insulating container (22) away from the high-pressure live line A. Then, the protrusion (16c) is pushed downward by the unlocking insulating plate (28), and the CT clamps (12a) and (12b) are opened (see FIG. 8).
(9) The insulating operation rod (24) is operated to move the insulating container (22) further away from the high-pressure live wire A. Then, the CT clamps (12a) and (12b) are separated from the high-pressure live line A and are simultaneously closed by urging by the spring force (see FIG. 9).
However, the indirect hot wire tool (20) described in Patent Document 1 is a work in which a spacer (27) is sandwiched between CT clamps (12a) and (12b), and a clamp type ammeter (10) is attached to a high voltage hot wire A. After removing the insulating container (22), when removing the clamp-type ammeter (10) from the high-voltage live wire A, the insulating container (22) is stored and the unlocking insulating plate (28) is placed on the protrusion (16c). There is a problem that it is difficult to remember the handling and takes a long time.

特開2009−118586号公報JP 2009-118586 A

本発明は上記の問題を解決し、漏れ電流計による漏洩電流の測定作業を簡単かつ短時間に行えるようにすることを第1の課題としている。
また、本発明は、一般に販売されている漏れ電流計に取り付けることで漏洩電流の測定作業を簡単かつ短時間に行えるようにすることを第2の課題としている。
さらに、本発明は、脚立等を用いることなく頭上1〜4m程度の高所にある引込線の漏れ電流を容易に測定できるようにすることを第3の課題、漏れ電流計のクランプ部が閉じた状態になってしまっても、再度開放状態にセットし直すことなく引込線をクランプ部内に挿入できるようにすることを第4の課題としている。
The first object of the present invention is to solve the above-described problem and to perform a leakage current measurement operation with a leakage ammeter easily and in a short time.
Moreover, this invention makes it the 2nd subject to be able to perform the measurement operation | work of a leakage current easily and in a short time by attaching to the leakage ammeter currently marketed generally.
Furthermore, the third object of the present invention is to make it possible to easily measure the leakage current of the lead-in wire at a height of about 1 to 4 m above the head without using a stepladder or the like, and the clamp part of the leakage ammeter is closed. Even if it becomes a state, it makes it the 4th subject to enable a lead-in wire to be inserted in a clamp part, without resetting an open state again.

請求項1に係る発明は、本体部及び該本体部の上端側に開閉自在に設けられた一対のクランプ部(3、4)を備えている漏れ電流計であって、
一方のクランプ部(3)に装着された従動部(12)と、
前記本体部の下端側に上下方向の所定範囲で摺動可能に設けられた摺動部(9)と、
該摺動部(9)の上方向への摺動に連動して前記従動部(12)を前記一方のクランプ部(3)が閉じる方向に移動させる連動部(11)と、
前記摺動部(9)を下方向に付勢する弾性部材(10)を備え、
前記摺動部(9)が下限位置にある時に、前記従動部(12)が両方向に移動自在であり、前記一方のクランプ部(3)が開閉自在であることを特徴とする。
The invention according to claim 1 is a leakage ammeter comprising a main body part and a pair of clamp parts (3, 4) provided on the upper end side of the main body part so as to be openable and closable.
A driven part (12) attached to one clamp part (3);
A sliding portion (9) provided on the lower end side of the main body portion so as to be slidable within a predetermined range in the vertical direction;
An interlocking part (11) for moving the driven part (12) in a direction in which the one clamp part (3) is closed in conjunction with the upward sliding of the sliding part (9) ;
An elastic member (10) for urging the sliding portion (9) downward;
When the sliding portion (9) is at the lower limit position, the driven portion (12) is movable in both directions, and the one clamp portion (3) is openable and closable .

請求項に係る発明は、請求項1記載の漏れ電流計において、
前記本体部の下端側に装着可能な筐体(5)をさらに備え、
前記摺動部(9)は前記筐体(5)に対して上下方向の所定範囲で摺動可能に設けられていることを特徴とする。
The invention according to claim 2 is the leakage ammeter according to claim 1,
A housing (5) attachable to a lower end side of the main body,
The sliding portion (9) is provided to be slidable within a predetermined range in the vertical direction with respect to the housing (5).

請求項に係る発明は、請求項1又は2に記載の漏れ電流計において、
前記摺動部(9)は前記本体部を保持可能であるとともに、その下端部に丈尺部を連結可能な連結部(22)を有していることを特徴とする。
The invention according to claim 3 is the leakage ammeter according to claim 1 or 2 ,
The sliding portion (9) can hold the main body portion and has a connecting portion (22) capable of connecting a length portion at a lower end portion thereof.

請求項に係る発明は、請求項1〜のいずれかに記載の漏れ電流計において、
前記一対のクランプ部(3、4)の先端にそれぞれ装着される一対の挿入補助部(24、25)を有し、
該一対の挿入補助部(24、25)は、前記一対のクランプ部(3、4)が閉じた状態において上方側が開いていることを特徴とする。
The invention according to claim 4 is the leakage ammeter according to any one of claims 1 to 3 ,
A pair of insertion assisting portions (24, 25) respectively attached to the tips of the pair of clamp portions (3, 4);
The pair of insertion assisting portions (24, 25) is characterized in that the upper side is open in a state where the pair of clamp portions (3, 4) are closed.

請求項1に係る発明の漏れ電流計によれば、摺動部(9)の上方向への摺動に連動して従動部(12)を一方のクランプ部(3)が閉じる方向に移動させる連動部(11)を備えているので、摺動部(9)を下限位置とし一対のクランプ部(3、4)を開状態とした上で引込線(26)をクランプ部(3、4)内へ挿入し、その後摺動部(9)を上方向へ摺動させるだけで一方のクランプ部(3)を閉じることができ、漏れ電流計による漏洩電流の測定作業を簡単かつ短時間に行うことができる。
また、摺動部(9)を下方向に付勢する弾性部材(10)を備え、摺動部(9)が下限位置にある時に従動部(12)が両方向に移動自在であり、一方のクランプ部(3)が開閉自在となっているので、通常は摺動部(9)が下限位置にあり、クランプ部(3)を開状態に保持できる。
そして、クランプ部(3、4)を開状態に保持した状態で引込線(26)をクランプ部(3、4)内へ挿入し、一旦摺動部(9)を上方向へ摺動させればクランプ部(3、4)は閉じ、その後摺動部(9)が下限位置に戻っても、漏れ電流計測終了まではクランプ部(3、4)を閉状態に保持することができる。
さらに、漏れ電流の計測が終了した後は、漏れ電流計を下方向に引っ張るだけでクランプ部(3、4)は引込線(26)によって押し開かれるので、漏れ電流計を引込線(26)から容易に取り外すことができる。
According to the leakage ammeter of the invention according to claim 1, the driven portion (12) is moved in the direction in which one clamp portion (3) is closed in conjunction with the upward sliding of the sliding portion (9). Since the interlocking portion (11) is provided, the sliding portion (9) is set to the lower limit position, the pair of clamp portions (3, 4) are opened, and the lead-in wire (26) is placed in the clamp portion (3, 4). It is possible to close one clamp part (3) simply by inserting it into the upper part and then sliding the sliding part (9) upward, so that the leakage current can be measured easily and in a short time. Can do.
Further, an elastic member (10) for urging the sliding portion (9) downward is provided, and when the sliding portion (9) is at the lower limit position, the driven portion (12) is movable in both directions. Since the clamp part (3) can be freely opened and closed, the sliding part (9) is normally in the lower limit position, and the clamp part (3) can be held in the open state.
Then, with the clamp portions (3, 4) held open, the lead-in wire (26) is inserted into the clamp portions (3, 4) and once the sliding portion (9) is slid upward. Even if the clamp portions (3, 4) are closed and then the sliding portion (9) returns to the lower limit position, the clamp portions (3, 4) can be kept closed until the leakage current measurement is completed.
Furthermore, after the measurement of the leakage current is completed, the clamps (3, 4) can be pushed open by the lead-in wire (26) simply by pulling the leakage ammeter downward. Can be removed.

請求項に係る発明によれば、請求項1に係る発明による効果に加えて、本体部の下端側に装着可能な筐体(5)をさらに備え、摺動部(9)は筐体(5)に対して上下方向の所定範囲で摺動可能に設けられているので、一般に販売されている漏れ電流計を筐体(5)に取り付けて利用することができる。 According to the invention according to claim 2 , in addition to the effect of the invention according to claim 1, the housing (5) that can be attached to the lower end side of the main body is further provided, and the sliding portion (9) is the housing ( Since it is provided to be slidable within a predetermined range in the vertical direction with respect to 5), a commercially available leakage ammeter can be attached to the housing (5) for use.

請求項に係る発明によれば、請求項1又は2に係る発明による効果に加えて、摺動部(9)は本体部を保持可能であるとともに、その下端部に丈尺部を連結可能な連結部(22)を有しているので、脚立等を用いることなく頭上1〜4m程度の高所にある引込線の漏れ電流を容易に測定できる。
すなわち、連結部(22)に適当な長さの丈尺部を連結し、クランプ部(3)を開状態とした後、丈尺部を持って引込線(26)をクランプ部(3、4)内へ挿入し、クランプ部(3、4)の下側を引込線(26)に押し付ければ、摺動部(9)は上方向に摺動して一方のクランプ部(3)が閉じるので、高所にある引込線に対しても漏れ電流計を容易にセットでき、漏洩電流の測定作業を簡単かつ短時間に行うことができる。
According to the invention of claim 3, in addition to the effects of the invention according to claim 1 or 2, the sliding portion (9) with is capable of holding the main body portion, it can be connected to Takeshaku portion at its lower end Since it has a connecting part (22), it is possible to easily measure the leakage current of the lead-in wire at a height of about 1 to 4 m above the head without using a stepladder or the like.
That is, after connecting the length portion of an appropriate length to the connection portion (22) and opening the clamp portion (3), the lead wire (26) is held by the length portion and the clamp portion (3, 4). If you insert it inside and press the lower part of the clamp part (3, 4) against the lead-in line (26), the sliding part (9) slides upward and one clamp part (3) closes. Leakage ammeters can be easily set even for lead-in wires in high places, and the measurement of leakage current can be performed easily and in a short time.

請求項に係る発明によれば、請求項1〜のいずれかに係る発明による効果に加えて、一対のクランプ部(3、4)の先端にそれぞれ装着される一対の挿入補助部(24、25)を有し、一対の挿入補助部(24、25)は、一対のクランプ部(3、4)が閉じた状態において上方側が開いているので、クランプ部(3、4)が閉じていても、一方のクランプ部(3)又は従動部(12)を何ら操作することなく、挿入補助部(24、25)を引込線(26)に押し付けるだけで、クランプ部(3、4)内に引込線(26)を挿入することができる。
また、開いた状態としたクランプ部(3、4)が、何らかの理由により閉じた状態になった場合においても、クランプ部(3、4)を再度開いた状態にセットし直すことなくクランプ部(3、4)内に引込線(26)を挿入することができる。
According to the invention according to claim 4 , in addition to the effects of the invention according to any one of claims 1 to 3 , a pair of insertion assisting parts (24) respectively attached to the tips of the pair of clamp parts (3, 4). 25), and the pair of insertion assisting portions (24, 25) is open on the upper side in a state where the pair of clamping portions (3, 4) is closed, so that the clamping portions (3, 4) are closed. However, without operating the one clamp part (3) or the driven part (12) at all, the insertion auxiliary part (24, 25) is simply pushed into the lead-in line (26), and is inserted into the clamp part (3, 4). A lead-in wire (26) can be inserted.
In addition, even when the clamp portions (3, 4) that are opened are closed for some reason, the clamp portions (3, 4) are not set again in the open state. 3, 4) A lead-in wire (26) can be inserted.

実施例1に係る漏れ電流計を構成するアタッチメントの斜視図。FIG. 3 is a perspective view of an attachment constituting the leakage ammeter according to the first embodiment. 実施例1に係る漏れ電流計のクランプ部を開放した状態を示す図。The figure which shows the state which open | released the clamp part of the leakage ammeter which concerns on Example 1. FIG. 実施例1に係る漏れ電流計に引込線を挿入しクランプ部を閉じた直後の図。The figure immediately after inserting a lead-in wire in the leak current meter concerning Example 1, and closing a clamp part. 実施例1に係る漏れ電流計を引込線から取り外す直前の図。The figure just before removing the leakage ammeter which concerns on Example 1 from a lead-in wire. 実施例1に係る漏れ電流計に引込線を挿入する他の方法を示す図。The figure which shows the other method of inserting a lead wire in the leakage ammeter which concerns on Example 1. FIG. 実施例2に係る漏れ電流計のクランプ部を開放及び閉鎖した状態を示す図。The figure which shows the state which open | released and closed the clamp part of the leak ammeter which concerns on Example 2. FIG.

以下、実施例によって本発明の実施形態を説明する。
なお、便宜上本明細書では、漏れ電流計のクランプ部がある側(図面上側)を上、漏れ電流計の本体部がある側(図面下側)を下と呼ぶこととする。
Hereinafter, embodiments of the present invention will be described by way of examples.
For the sake of convenience, in this specification, the side with the clamp part of the leakage ammeter (upper side in the drawing) is referred to as the upper side, and the side with the main body part of the leakage ammeter (lower side in the drawing) is referred to as the lower side.

図1は実施例1に係る漏れ電流計を構成するアタッチメント1の斜視図であり、図2はアタッチメント1に一般に販売されている漏れ電流計2を取り付けてなる実施例1に係る漏れ電流計及び実施例1に係る漏れ電流計のクランプ部3、4を開放した状態を示す図(図2(A)は表側から見た図、図2(B)は裏側から見た図)である。
なお、漏れ電流計2のクランプ部3、4がバネ等で閉鎖方向又は開放方向に付勢されている場合には、そのバネ等は外してアタッチメント1に取り付ける。
図1及び図2に示すように、アタッチメント1は、漏れ電流計2の本体部を挿入することのできる筐体5、漏れ電流計2のネジ穴に挿入可能な突起6を有するとともに筐体5の一側面の上部にネジ7で固定できる固定具8、筐体5を挿入でき筐体5に対して上下方向に摺動可能な摺動部9及び筐体5の下面から摺動部9を下方向に付勢する弾性部材10により構成されている。
FIG. 1 is a perspective view of an attachment 1 constituting the leakage ammeter according to the first embodiment. FIG. 2 is a perspective view of the leakage ammeter according to the first embodiment in which a leakage ammeter 2 generally sold is attached to the attachment 1. It is a figure (Drawing 2 (A) is a figure seen from the front side, Drawing 2 (B) is a figure seen from the back side) which shows a state where clamp parts 3 and 4 of a leak current meter concerning Example 1 were opened.
In addition, when the clamp parts 3 and 4 of the leak ammeter 2 are urged in the closing direction or the opening direction by a spring or the like, the spring or the like is removed and attached to the attachment 1.
As shown in FIGS. 1 and 2, the attachment 1 has a housing 5 into which the main body of the leakage ammeter 2 can be inserted, a protrusion 6 that can be inserted into a screw hole of the leakage ammeter 2, and the housing 5. A fixture 8 that can be fixed with a screw 7, a sliding portion 9 that can be inserted into the casing 5 and that can slide in the vertical direction with respect to the casing 5, and a sliding portion 9 from the lower surface of the casing 5. The elastic member 10 is urged downward.

筐体5の一側面及び他側面の下部にはロッド部11の一端部が回動可能に軸支されており、ロッド部11の他端部には漏れ電流計2のクランプ部3、4のうちの一方のクランプ部3に装着できる従動部12が設けてある。
なお、従動部12は略コの字状でロッド部11側にはスポンジ等の緩衝材13が設けてあるので、漏れ電流計2の本体部を筐体5に挿入するに際して、一方のクランプ部3に横から挿入してガタつきなく装着できるようになっている。
また、筐体5の下端部には下方に延びる抜け止め部14が設けてある。この抜け止め部14は摺動部9の下面に設けられた穴を貫通しており、その穴より大きい座金15が抜け止め部14の下端部にビス16で固定してある。
そのため、摺動部9は弾性部材10により下方向に付勢されたり、下方向に引っ張られたりしても筐体5から抜けることがない。また、摺動部9が上方向に押し上げられた場合には、摺動部9の下面が筐体5の下端部に接触するより先に摺動部9の上縁18が筐体5の側面に設けられている突条17にぶつかって止まるので、摺動部9は筐体5に対して上下方向の所定範囲で摺動可能となっている。
そして、筐体5の他側面の上端部には漏れ電流計2の本体部を筐体5に挿入した時にダイヤル部がぶつからないようにするため弧状の切り欠き部19を設け、中央部には漏れ電流計2の表示部が隠れてしまわないようにするため長方形状の窓部20を設けてある。
One end of the rod portion 11 is pivotally supported on one side of the housing 5 and the lower portion of the other side, and the other end of the rod portion 11 has clamps 3 and 4 of the leak current meter 2. A driven portion 12 that can be attached to one of the clamp portions 3 is provided.
Since the follower 12 is substantially U-shaped and a cushioning material 13 such as a sponge is provided on the rod 11 side, when the main body of the leakage ammeter 2 is inserted into the housing 5, one of the clamps 3 is inserted from the side so that it can be mounted without rattling.
Further, the lower end portion of the housing 5 is provided with a retaining portion 14 that extends downward. The retaining portion 14 passes through a hole provided in the lower surface of the sliding portion 9, and a washer 15 larger than the hole is fixed to the lower end portion of the retaining portion 14 with a screw 16.
Therefore, even if the sliding portion 9 is urged downward by the elastic member 10 or pulled downward, it does not come out of the housing 5. Further, when the sliding portion 9 is pushed upward, the upper edge 18 of the sliding portion 9 faces the side surface of the housing 5 before the lower surface of the sliding portion 9 contacts the lower end portion of the housing 5. The sliding portion 9 can slide within a predetermined range in the vertical direction with respect to the housing 5.
An arc-shaped notch 19 is provided at the upper end of the other side surface of the housing 5 so that the dial portion does not collide when the main body of the leakage ammeter 2 is inserted into the housing 5. In order to prevent the display part of the leak current meter 2 from being hidden, a rectangular window part 20 is provided.

摺動部9の他側面の上部には、弾性部材10により下方向に付勢され摺動部9の下面が座金15に接触している状態において、漏れ電流計2の表示部が隠れてしまわないようにするためコの字状の切り欠き窓部21を設けてある。
そして、摺動部9が上方向に押し上げられ上縁18が突条17にぶつかって止まっている状態においては、ロッド部11の下部が摺動部9の上端部に押されるため、従動部12はクランプ部3が閉じる位置しかとれない状態となる。
また、逆に摺動部9が下方向に付勢されたり下方向に引っ張られたりして、摺動部9の下面が座金15に接触している状態においては、ロッド部11の下部と摺動部9の上端部との間にロッド部11が回動できる余裕が生じるため、従動部12はクランプ部3、4が閉じる位置と開く位置との間で移動自在の状態となる。
摺動部9の下端部には下方に延びる連結部22が設けてある。この連結部22は丈尺部(図示せず)を連結するためのものであり、丈尺部の上端部に設けてあるピンを受け入れて抜けにくくするため、L字状の案内部23が設けてある。
丈尺部は連結部22に接続できる棒状のものであれば良いが、伸縮するとともに伸縮部にストッパーがついているものであれば、長さを調節して固定できるのでより良い。
連結部22に丈尺部を接続することにより、脚立等を用いることなく頭上1〜4m程度の高所にある低圧引込線(以下「引込線」という。)に漏れ電流計2を容易に取り付けて漏れ電流を測定することができるとともに、その後引込線から漏れ電流計2を容易に取り外すことができる。
On the upper part of the other side surface of the sliding part 9, the display part of the leak current meter 2 is hidden in a state where the elastic member 10 urges downward and the lower surface of the sliding part 9 is in contact with the washer 15. In order to prevent this, a U-shaped cutout window 21 is provided.
In the state where the sliding portion 9 is pushed upward and the upper edge 18 hits the protrusion 17 and stops, the lower portion of the rod portion 11 is pushed by the upper end portion of the sliding portion 9, so that the driven portion 12. Will be in the state which can take only the position which the clamp part 3 closes.
On the contrary, when the sliding portion 9 is urged downward or pulled downward and the lower surface of the sliding portion 9 is in contact with the washer 15, the sliding portion 9 slides with the lower portion of the rod portion 11. Since there is a margin in which the rod portion 11 can rotate between the upper end portion of the moving portion 9, the driven portion 12 is movable between a position where the clamp portions 3, 4 are closed and a position where the clamp portion 3 is opened.
A connecting portion 22 extending downward is provided at the lower end portion of the sliding portion 9. The connecting portion 22 is for connecting a lengthy portion (not shown), and an L-shaped guide portion 23 is provided to receive a pin provided at the upper end of the lengthy portion and make it difficult to remove. It is.
The length portion may be a rod-like shape that can be connected to the connecting portion 22, but if the length portion can be expanded and contracted and a stopper is attached to the expansion and contraction portion, the length can be adjusted and fixed.
Leakage ammeter 2 can be easily attached to a low-voltage lead-in wire (hereinafter referred to as “lead-in wire”) at a height of about 1 to 4 m above the head without using a stepladder or the like by connecting a length portion to connecting portion 22. While being able to measure an electric current, the leakage ammeter 2 can be easily removed after that from a lead-in wire.

図2に示すように、クランプ部3、4の先端には一対の引込線への挿入補助部24、25が装着されている。
一対の挿入補助部24、25は、それぞれクランプ部3、4の先端部を挿入することができる長方形状の穴を有している。
また、挿入補助部24のクランプ部3が挿入される穴の先端側には、クランプ部3の先端部とほぼ同じ幅の凹部が形成されており、挿入補助部25のクランプ部4が挿入される穴の先端側には、挿入補助部24の先端側の幅より少し広い幅の凹部が形成されている。
そのため、クランプ部3、4を閉じる時には、挿入補助部25の凹部に挿入補助部24の先端側が入り込めるようになっている。
As shown in FIG. 2, insertion auxiliary portions 24 and 25 for a pair of lead wires are attached to the tips of the clamp portions 3 and 4.
The pair of insertion assisting portions 24 and 25 have rectangular holes into which the tip portions of the clamp portions 3 and 4 can be inserted, respectively.
Further, a recess having substantially the same width as that of the distal end portion of the clamp portion 3 is formed on the distal end side of the hole into which the clamp portion 3 of the insertion assisting portion 24 is inserted, and the clamp portion 4 of the insertion assisting portion 25 is inserted. A recess having a width slightly wider than the width of the distal end side of the insertion assisting portion 24 is formed on the distal end side of the hole.
Therefore, when closing the clamp portions 3 and 4, the distal end side of the insertion assisting portion 24 can enter the recess of the insertion assisting portion 25.

図3は実施例1に係る漏れ電流計に引込線26を挿入しクランプ部3、4を閉じた直後の図(図3(A)は表側から見た図、図3(B)は裏側から見た図)である。
図2の状態から図3の状態になるまで、すなわち、引込線26に実施例1に係る漏れ電流計を取り付ける手順を説明する。
(1)図2の状態にある漏れ電流計を引込線26に近付けて、開いているクランプ部3、4及び挿入補助部24、25の隙間から引込線26を挿入する。
(2)摺動部9又は連結部22に接続されている丈尺部を操作して、クランプ部3、4の下側を引込線26に押し付け、摺動部9を上縁18が突条17にぶつかるまで上方(図3下側の矢印方向)にスライドさせる。
(3)そうすると、ロッド部11の下部が摺動部9の上端部に押され、従動部12はクランプ部3が閉じる方向(図3上側の矢印方向)に移動し、クランプ部3は緩衝材13で押されて閉じる(図3の状態となる)。
3 is a view immediately after inserting the lead-in wire 26 into the leakage ammeter according to the first embodiment and closing the clamp portions 3 and 4 (FIG. 3A is a view from the front side, and FIG. 3B is a view from the back side. Figure).
A procedure for attaching the leakage ammeter according to the first embodiment to the state shown in FIG. 3 from the state shown in FIG.
(1) The leakage ammeter in the state of FIG. 2 is brought close to the lead-in wire 26, and the lead-in wire 26 is inserted from the gap between the open clamp portions 3 and 4 and the insertion auxiliary portions 24 and 25.
(2) The length portion connected to the sliding portion 9 or the connecting portion 22 is operated to press the lower side of the clamp portions 3 and 4 against the lead-in wire 26, and the upper edge 18 of the sliding portion 9 has the protrusion 17. Slide upward (in the direction of the arrow on the lower side in FIG. 3) until it hits.
(3) Then, the lower part of the rod part 11 is pushed by the upper end part of the sliding part 9, the driven part 12 moves to the direction (arrow direction of FIG. 3 upper side) which the clamp part 3 closes, and the clamp part 3 is a shock absorbing material. 13 is pushed and closed (the state shown in FIG. 3 is reached).

図4は実施例1に係る漏れ電流計を引込線から取り外す直前の図(図4(A)は表側から見た図、図4(B)は裏側から見た図)である。
図4の状態から図2の状態になるまで、すなわち、引込線26から実施例1に係る漏れ電流計を取り外す手順を説明する。
(4)図3の状態にある漏れ電流計の摺動部9又は連結部22に接続されている丈尺部を操作して、引込線26を閉じているクランプ部3、4及び挿入補助部24、25の接合部付近に位置させる(図4の状態)。
(5)図4の状態からさらに摺動部9又は連結部22に接続されている丈尺部を操作して、漏れ電流計を下方(図4下側の矢印方向)に引く。
(6)そうすると、従動部12はクランプ部3が閉じる位置と開く位置との間で移動自在の状態となっているので、引込線26がクランプ部3、4及び挿入補助部24、25を押すと、クランプ部3及び挿入補助部24は開く方向(図4上側の矢印方向)に移動し、引込線26がクランプ部3、4から外れる(図2の状態となる)。
FIG. 4 is a view (FIG. 4A is a view seen from the front side, and FIG. 4B is a view seen from the back side) immediately before the leakage ammeter according to the first embodiment is removed from the lead-in wire.
A procedure for removing the leakage ammeter according to the first embodiment from the state shown in FIG. 4 until the state shown in FIG.
(4) The clamp portions 3 and 4 and the insertion assisting portion 24 closing the lead-in wire 26 by operating the length portion connected to the sliding portion 9 or the connecting portion 22 of the leakage ammeter in the state of FIG. , 25 (position of FIG. 4).
(5) From the state of FIG. 4, the length portion connected to the sliding portion 9 or the connecting portion 22 is further operated to pull the leakage ammeter downward (in the arrow direction on the lower side of FIG. 4).
(6) Then, the driven part 12 is in a state of being movable between the position where the clamp part 3 is closed and the position where the clamp part 3 is opened, so that when the lead-in wire 26 pushes the clamp parts 3, 4 and the insertion auxiliary parts 24, 25. The clamp part 3 and the insertion auxiliary part 24 move in the opening direction (the arrow direction on the upper side in FIG. 4), and the lead-in wire 26 comes off from the clamp parts 3 and 4 (the state shown in FIG. 2 is obtained).

図5は実施例1に係る漏れ電流計に引込線を挿入する他の方法を示す図(図5(A)は表側から見た図、図5(B)は裏側から見た図)である。
図5の状態から図3の状態になるまで、すなわち、引込線26に実施例1に係る漏れ電流計を取り付ける他の手順を説明する。
(7)摺動部9又は連結部22に接続されている丈尺部を操作して、引込線26が挿入補助部24、25に近づく方向(図5上側の直線矢印方向)に漏れ電流計を移動させ、引込線26を挿入補助部24、25の接合部に食い込ませる(図5の状態)。
(8)ここで、摺動部9は弾性部材10の付勢力により、それほど上方向には押し上げられておらず、従動部12はクランプ部3、4が閉じる位置と開く位置との間で移動自在の状態となっているので、クランプ部3及び挿入補助部24は開く方向(図5上側の弧状矢印方向)に移動し、挿入補助部24、25の隙間から引込線26がクランプ部3、4の中に挿入される。
(9)引込線26がクランプ部3、4の中に挿入された後、さらに摺動部9又は連結部22に接続されている丈尺部を操作して、クランプ部3、4の下側を引込線26に押し付け、摺動部9を上縁18が突条17にぶつかるまで上方(図3下側の矢印方向)にスライドさせると、上記(3)と同様、従動部12はクランプ部3、4が閉じる方向(図3上側の矢印方向)に移動し、クランプ部3は緩衝材13で押されて閉じる(図3の状態となる)。
FIG. 5 is a view showing another method of inserting a lead-in wire into the leakage ammeter according to the first embodiment (FIG. 5A is a view seen from the front side, and FIG. 5B is a view seen from the back side).
From the state of FIG. 5 to the state of FIG. 3, that is, another procedure for attaching the leakage ammeter according to the first embodiment to the lead-in wire 26 will be described.
(7) Operate the length portion connected to the sliding portion 9 or the connecting portion 22, and set the leakage ammeter in the direction in which the lead-in wire 26 approaches the insertion auxiliary portions 24, 25 (in the direction of the straight arrow on the upper side in FIG. 5). The lead-in wire 26 is bitten into the joint portion between the insertion assisting portions 24 and 25 (the state shown in FIG. 5).
(8) Here, the sliding portion 9 is not pushed up so much by the urging force of the elastic member 10, and the driven portion 12 moves between a position where the clamp portions 3 and 4 are closed and a position where the clamp portion 3 is opened. Since it is in a free state, the clamp part 3 and the insertion auxiliary part 24 move in the opening direction (in the direction of the arcuate arrow on the upper side of FIG. Is inserted inside.
(9) After the lead-in wire 26 is inserted into the clamp portions 3 and 4, the length portion connected to the sliding portion 9 or the connecting portion 22 is further operated, and the lower side of the clamp portions 3 and 4 is moved. When pressed against the lead-in wire 26 and the sliding portion 9 is slid upward (in the direction of the arrow on the lower side in FIG. 3) until the upper edge 18 hits the protrusion 17, the driven portion 12 is connected to the clamp portion 3, as in (3) above. 4 moves in the closing direction (the arrow direction on the upper side in FIG. 3), and the clamp portion 3 is pushed by the cushioning material 13 to close (becomes the state shown in FIG. 3).

図6は実施例2に係る漏れ電流計のクランプ部3、4を開放及び閉鎖した状態を示す図(表側から見た図のみ)である。
実施例2は、実施例1の筐体5、固定具8及び挿入補助部24、25を除き、実施例1で利用していた一般に販売されている漏れ電流計2に通信機能を付加した専用の漏れ電流計30に代えたものである。
そして、実施例1の筐体5に設けてあったロッド部11、従動部12、緩衝材13、抜け止め部14、座金15、ビス16及び突条17は、漏れ電流計30の本体部に直接設けてあり、他の構成(摺動部9、弾性部材10及び丈尺部の構成)は実施例1とほぼ同様である。
そのため、漏れ電流計30の本体部に直接設けた構成のみについて、番号をロッド部31、従動部32、緩衝材33、抜け止め部34、座金35、ビス36及び突条37に変更し、他の構成については、実施例1と同じ番号を用い説明は省略する。
なお、実施例1の挿入補助部24、25を実施例2のクランプ部3、4の先端に装着しても良いことはいうまでもない。
FIG. 6 is a view (only a view seen from the front side) showing a state in which the clamp portions 3 and 4 of the leakage ammeter according to the second embodiment are opened and closed.
In the second embodiment, a communication function is added to the commercially available leakage ammeter 2 used in the first embodiment, except for the case 5, the fixture 8 and the insertion assisting portions 24 and 25 of the first embodiment. The leakage ammeter 30 is replaced with the above.
And the rod part 11, the driven part 12, the cushioning material 13, the retaining part 14, the washer 15, the screw 16 and the protrusion 17 provided in the housing 5 of the first embodiment are attached to the main part of the leakage ammeter 30. Other configurations (sliding portion 9, elastic member 10, and length portion) are almost the same as those in the first embodiment.
Therefore, the number is changed to the rod part 31, the driven part 32, the cushioning material 33, the retaining part 34, the washer 35, the screw 36, and the protrusion 37 only for the configuration directly provided on the main body part of the leakage ammeter 30. About the structure of this, the same number as Example 1 is used and description is abbreviate | omitted.
Needless to say, the insertion assisting portions 24 and 25 of the first embodiment may be attached to the tips of the clamp portions 3 and 4 of the second embodiment.

実施例2に係る漏れ電流計における摺動部9の動きとクランプ部3、4の動きとの関係を簡単に説明する。
摺動部9が下方向に付勢されたり下方向に引っ張られたりして、摺動部9の下面が座金35に接触している状態(図6(A)の状態)においては、ロッド部31の下部と摺動部9の上端部との間にロッド部31が回動できる余裕が生じるため、従動部32はクランプ部3が閉じる位置と開く位置との間で移動自在の状態である。
そして、摺動部9が上方向に押し上げられ上縁18が突条37にぶつかって止まっている状態においては、ロッド部31の下部が摺動部9の上端部に押されるため、従動部32はクランプ部3が閉じる位置しかとれない状態となる。
これらの関係は、実施例1に係る漏れ電流計における摺動部9の動き及びクランプ部3、4の動きと同じ関係であるので、引込線26に実施例2に係る漏れ電流計を取り付ける手順は、引込線26に実施例1に係る漏れ電流計を取り付ける上記手順(1)〜(3)と同様となり、引込線26から実施例2に係る漏れ電流計を取り外す手順も、引込線26から実施例1に係る漏れ電流計を取り外す上記手順(4)〜(6)と同様となる。
The relationship between the movement of the sliding portion 9 and the movement of the clamp portions 3 and 4 in the leakage ammeter according to the second embodiment will be briefly described.
When the sliding portion 9 is urged downward or pulled downward and the lower surface of the sliding portion 9 is in contact with the washer 35 (the state shown in FIG. 6A), the rod portion Since there is room for the rod part 31 to be rotatable between the lower part of the slider 31 and the upper end part of the sliding part 9, the driven part 32 is movable between the position where the clamp part 3 is closed and the position where it is opened. .
In the state where the sliding portion 9 is pushed upward and the upper edge 18 hits the protrusion 37 and stops, the lower portion of the rod portion 31 is pushed by the upper end portion of the sliding portion 9, so that the driven portion 32. Will be in the state which can take only the position which the clamp part 3 closes.
Since these relationships are the same as the movement of the sliding portion 9 and the movement of the clamp portions 3 and 4 in the leakage current meter according to the first embodiment, the procedure for attaching the leakage current meter according to the second embodiment to the lead-in wire 26 is as follows. The procedure for attaching the leakage ammeter according to the first embodiment to the lead-in wire 26 is the same as the above procedure (1) to (3), and the procedure for removing the leakage ammeter according to the second embodiment from the lead-in wire 26 is also changed from the lead-in wire 26 to the first embodiment. It becomes the same as the said procedure (4)-(6) which removes the leakage ammeter which concerns.

実施例1及び2に係る漏れ電流計の変形例を列記する。
(1)実施例1においては、摺動部9が筐体5を保持し、実施例2においては、摺動部9が漏れ電流計の本体部を保持するようになっていたが、摺動部9は筐体5又は漏れ電流計の本体部に対して上下方向の所定範囲で摺動可能となっていれば筐体5又は本体部を保持するものでなくても良い。
(2)実施例1及び2においては、ロッド部11、31は一端部が回動可能に軸支され、摺動部9の押し上げに伴ってロッド部11の下部が摺動部9の上端部に押されることで、従動部12をクランプ部3が閉じる位置しかとれない状態となるようにしていたが、摺動部9の押し上げと従動部12の連動機構は、このような機構に限らずラックピニオン機構、スライダカム機構等の直線運動を回転運動に変える機構を用いても良い。
そのため、特許請求の範囲においては、ロッド部11、31に対応する構成を連動部と記載している。
The modification of the leakage ammeter which concerns on Example 1 and 2 is listed.
(1) In Example 1, the sliding part 9 holds the housing 5, and in Example 2, the sliding part 9 holds the main body of the leakage ammeter. The part 9 may not hold the case 5 or the main body part as long as it can slide within a predetermined range in the vertical direction with respect to the case 5 or the main body part of the leakage ammeter.
(2) In the first and second embodiments, the rod portions 11 and 31 are pivotally supported at one end so that the lower portion of the rod portion 11 is the upper end of the sliding portion 9 as the sliding portion 9 is pushed up. However, the mechanism for pushing up the sliding portion 9 and the interlocking mechanism of the driven portion 12 is not limited to such a mechanism. A mechanism such as a rack and pinion mechanism or a slider cam mechanism that changes linear motion to rotational motion may be used.
Therefore, in the claims, the configuration corresponding to the rod portions 11 and 31 is described as an interlocking portion.

(3)実施例1の漏れ電流計は、摺動部9を筐体5に対して下方向に付勢する弾性部材10を備え、実施例2の漏れ電流計は、摺動部9を漏れ電流計の本体部に対して下方向に付勢する弾性部材10を備えていたが、弾性部材10は設けなくても良い。
そうした場合、摺動部9を上限位置及び下限位置のいずれか一方に仮止めする機構(クリック機構等)を設けるとより良い。
(4)実施例1及び2においては、摺動部9が下限位置にある時に、従動部12が両方向に移動自在であり、一方のクランプ部3が開閉自在であったが、摺動部9が下限位置にある時に、従動部12が一方のクランプ部3を開く位置に移動し、摺動部9が上限位置にある時に、従動部12が一方のクランプ部3が閉じる位置に移動するようにしても良い。
そのための機構としては、実施例1及び2と同様の機構のまま、クランプ部3、4を開く方向に付勢しても良いし、摺動部9が下限位置にある時において、強制的に従動部12を一方のクランプ部3が開く位置へ移動させる機構としても良い。
そうした場合には、摺動部9を下限位置としてクランプ部3、4を開状態に保持し、その状態で引込線26を挿入した後、摺動部9を上限位置としてクランプ部3、4を閉状態に保持し、その状態で漏れ電流を計測した後、摺動部9を下限位置に戻してクランプ部3、4を開状態に保持し、その状態で漏れ電流計を引込線26から取り外すこととなる。
(3) The leakage ammeter of Example 1 includes an elastic member 10 that urges the sliding portion 9 downward with respect to the housing 5, and the leakage ammeter of Example 2 leaks the sliding portion 9. Although the elastic member 10 that urges the main body of the ammeter downward is provided, the elastic member 10 may not be provided.
In such a case, it is better to provide a mechanism (such as a click mechanism) that temporarily holds the sliding portion 9 at either the upper limit position or the lower limit position.
(4) In the first and second embodiments, when the sliding portion 9 is at the lower limit position, the driven portion 12 is movable in both directions and one clamp portion 3 is openable and closable. Is moved to a position where one of the clamp portions 3 is opened, and when the sliding portion 9 is located at the upper limit position, the driven portion 12 is moved to a position where one of the clamp portions 3 is closed. Anyway.
As a mechanism for that purpose, the clamp mechanism 3 or 4 may be urged in the opening direction with the same mechanism as in the first and second embodiments, or when the sliding portion 9 is at the lower limit position, It is good also as a mechanism which moves the driven part 12 to the position which one clamp part 3 opens.
In such a case, the clamp portions 3 and 4 are held in the open state with the sliding portion 9 as the lower limit position, and the lead wire 26 is inserted in that state, and then the clamp portions 3 and 4 are closed with the slide portion 9 as the upper limit position. Holding the state and measuring the leakage current in that state, returning the sliding portion 9 to the lower limit position, holding the clamp portions 3 and 4 in the open state, and removing the leakage ammeter from the lead-in wire 26 in that state; Become.

(5)実施例1及び2においては、摺動部9の下端部に丈尺部を連結可能な連結部22を有していたが、手の届く範囲で行われる漏れ電流計測専用であれば連結部22を設ける必要はない。
逆に、手の届く範囲から高所にある引込線の漏れ電流計測専用とする場合には、摺動部9と適当な長さの丈尺部(伸縮可能なものでも良い)を一体化しても良い。
(6)実施例1においては、一対のクランプ部3、4の先端にそれぞれ装着される一対の挿入補助部24、25を有していたが、実施例2と同様に挿入補助部24、25は設けなくても良い。
また、挿入補助部24、25を装着する代わりに、一対のクランプ部3、4の先端部自体の形状を、一対のクランプ部3、4が閉じた状態において上方側が開いた形態となるようなものとしても良い。
(5) In Embodiments 1 and 2, the lower end of the sliding portion 9 has the connecting portion 22 that can connect the length portion, but if it is dedicated to leakage current measurement performed within the reach of the hand There is no need to provide the connecting portion 22.
Conversely, when dedicated to measuring the leakage current of a lead-in wire that is at a high place from the reachable range, the sliding portion 9 and an appropriate length of the length portion (which can be expanded and contracted) may be integrated. good.
(6) Although the first embodiment has the pair of insertion assisting portions 24 and 25 attached to the tips of the pair of clamp portions 3 and 4, respectively, the insertion assisting portions 24 and 25 are the same as in the second embodiment. May not be provided.
Further, instead of mounting the insertion assisting parts 24, 25, the shape of the tip part itself of the pair of clamp parts 3, 4 is such that the upper side is open when the pair of clamp parts 3, 4 is closed. It is good as a thing.

1 アタッチメント 2 一般に販売されている漏れ電流計
3、4 クランプ部 5 筐体 6 突起 7 ネジ
8 固定具 9 摺動部 10 弾性部材 11 ロッド部
12 従動部 13 緩衝材 14 抜け止め部 15 座金
16 ビス 17 突条 18 上縁 19 切り欠き部
20 窓部 21 切り欠き窓部 22 連結部
23 案内部 24、25 補助挿入部 26 引込線
31 ロッド部 32 従動部 33 緩衝材
34 抜け止め部 35 座金 36 ビス 37 突条
DESCRIPTION OF SYMBOLS 1 Attachment 2 Leakage ammeter currently sold 3, 4 Clamp part 5 Case 6 Protrusion 7 Screw 8 Fixing tool 9 Sliding part 10 Elastic member 11 Rod part 12 Drive part 13 Buffering material 14 Stopping part 15 Washer 16 Screw 17 ridge 18 upper edge 19 notch portion 20 window portion 21 notch window portion 22 connecting portion 23 guide portion 24, 25 auxiliary insertion portion 26 lead-in wire 31 rod portion 32 driven portion 33 cushioning material 34 retaining portion 35 washer 36 screw 37 Ridge

Claims (4)

本体部及び該本体部の上端側に開閉自在に設けられた一対のクランプ部を備えている漏れ電流計であって、
一方のクランプ部に装着された従動部と、
前記本体部の下端側に上下方向の所定範囲で摺動可能に設けられた摺動部と、
該摺動部の上方向への摺動に連動して前記従動部を前記一方のクランプ部が閉じる方向に移動させる連動部と、
前記摺動部を下方向に付勢する弾性部材を備え
前記摺動部が下限位置にある時に、前記従動部が両方向に移動自在であり、前記一方のクランプ部が開閉自在である
ことを特徴とする漏れ電流計。
A leakage ammeter comprising a main body part and a pair of clamp parts provided on the upper end side of the main body part so as to be freely opened and closed,
A follower mounted on one of the clamps;
A sliding portion provided on the lower end side of the main body portion so as to be slidable in a predetermined range in the vertical direction;
An interlocking portion that moves the driven portion in a direction in which the one clamp portion is closed in conjunction with the upward sliding of the sliding portion ;
An elastic member for urging the sliding portion downward ;
The leakage ammeter according to claim 1, wherein when the sliding portion is at a lower limit position, the driven portion is movable in both directions, and the one clamp portion is openable and closable .
前記本体部の下端側に装着可能な筐体をさらに備え、
前記摺動部は前記筐体に対して上下方向の所定範囲で摺動可能に設けられている
ことを特徴とする請求項1に記載の漏れ電流計。
A housing that can be attached to the lower end of the main body;
The leakage ammeter according to claim 1, wherein the sliding portion is provided so as to be slidable within a predetermined range in the vertical direction with respect to the housing.
前記摺動部は前記本体部を保持可能であるとともに、その下端部に丈尺部を連結可能な連結部を有している
ことを特徴とする請求項1又は2に記載の漏れ電流計。
Together with the sliding portion is capable of retaining the main body portion, the leakage current meter according to claim 1 or 2, characterized in that a connecting portion connectable to Takeshaku portion at its lower end.
前記一対のクランプ部の先端にそれぞれ装着される一対の挿入補助部を有し、
該一対の挿入補助部は、前記一対のクランプ部が閉じた状態において上方側が開いている
ことを特徴とする請求項1〜のいずれかに記載の漏れ電流計。
Having a pair of insertion assisting parts respectively attached to the tips of the pair of clamp parts;
The leakage ammeter according to any one of claims 1 to 3 , wherein the pair of insertion assisting portions are open on the upper side when the pair of clamp portions are closed.
JP2017185282A 2017-09-26 2017-09-26 Leak current meter Active JP6488344B1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53143678U (en) * 1977-04-19 1978-11-13
JPS60109057U (en) * 1983-12-28 1985-07-24 共立電気計器株式会社 Clamp type ammeter
JP4618763B2 (en) * 2003-06-04 2011-01-26 ミドリ安全株式会社 Clamp type leak current meter
JP5394605B2 (en) * 2006-10-19 2014-01-22 日置電機株式会社 Clamp tester
FR2973881B1 (en) * 2011-04-11 2013-11-08 Schneider Electric Ind Sas DEVICE AND ASSEMBLY FOR MEASURING AN ELECTRICAL CURRENT

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