JP2007170998A - Watt-hour meter - Google Patents
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- JP2007170998A JP2007170998A JP2005369310A JP2005369310A JP2007170998A JP 2007170998 A JP2007170998 A JP 2007170998A JP 2005369310 A JP2005369310 A JP 2005369310A JP 2005369310 A JP2005369310 A JP 2005369310A JP 2007170998 A JP2007170998 A JP 2007170998A
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本発明は、例えば一般家庭における電気使用量を計量する電力量計に関し、特に電力量計の取替え時等における、電源側電線および負荷側電線の接続順番や取り外し順番の間違えを少なくするための電力量計に関するものである。 The present invention relates to a watt-hour meter that measures, for example, the amount of electricity used in a general household, and in particular, electric power for reducing mistakes in the order of connection and removal of power-side wires and load-side wires when replacing the watt-hour meter. It relates to a meter.
電力量計は、電力会社からの電力が導かれる電源側電線と、需要家側に電力を導く負荷側電線との間に介在し、需要家の使用電気量を計量している。図１５に従来の単相三線式の電力量計を説明するための図を示した。図に示すように、電力量計１は、メータ本体１０と、電力会社からの電力が導かれる電源側電線１１と、需要家側に電力を導く負荷側電線１２と、各電線１１，１２を個別に着脱可能に接続する複数の端子部１３とを備えている。なお電源側電線１１および負荷側電線１２には、それぞれ接地線１１ａおよび１２ａを含んでいる。
一般的に電源側電線１１および負荷側電線１２は、それぞれ一線ずつが端子部１３を構成する端子締付ネジ１３０によって凹部１８内でネジ止めされており、この端子部１３はその保護のために第一端子カバー１４によって覆われている。さらに第一端子カバー１４は、ネジ１５によって電力量計１に固定されている。なお、接地線１１ａおよび１２ａは、接地線用の端子部１３ａに接続されている。
The watt-hour meter is interposed between a power supply side electric wire to which the electric power from the electric power company is guided and a load side electric wire to guide the electric power to the consumer side, and measures the amount of electricity used by the consumer. FIG. 15 shows a diagram for explaining a conventional single-phase three-wire watt-hour meter. As shown in the figure, the watt-hour meter 1 includes a meter body 10, a power supply side electric wire 11 to which electric power from an electric power company is guided, a load side electric wire 12 to guide electric power to a consumer side, and the electric wires 11 and 12. And a plurality of terminal portions 13 which are individually detachably connected. The power supply side electric wire 11 and the load side electric wire 12 include ground lines 11a and 12a, respectively.
Generally, each of the power supply side electric wire 11 and the load side electric wire 12 is screwed in the concave portion 18 by a terminal fastening screw 130 constituting the terminal portion 13, and this terminal portion 13 is used for protection. Covered by the first terminal cover 14. Further, the first terminal cover 14 is fixed to the watt hour meter 1 with a screw 15. The ground wires 11a and 12a are connected to the terminal portion 13a for the ground wire.
電力量計の端子部のカバーは、作業者の安全の確保や、取替え時の容易性を目的として下記特許文献にあるように従来から幾つか提案されている。
従来の電力量計１ではその取替え時などに、電源側電線１１および負荷側電線１２の接続順番や取り外し順番を間違えることがあり、その場合、需要家に大きな損失を与える虞があった。例えば接地線１１ａまたは１２ａを一番最初に外したり、あるいは最後に接続したりすると、需要家宅内に過電圧（２００Ｖ）が入り、電化製品を破壊する虞があった。これは従来の電力量計１では、第一端子カバー１４を外すと、各電線１１，１２および端子部１３，１３ａの形状上の違いがないために、接続順番や取り外し順番を間違えやすかったためである。 In the conventional watt-hour meter 1, the connection order and the removal order of the power-side electric wire 11 and the load-side electric wire 12 may be mistaken at the time of replacement, and in that case, there is a possibility of causing a great loss to the consumer. For example, when the ground wire 11a or 12a is disconnected first or connected last, an overvoltage (200V) enters the customer's house, which may destroy the appliance. This is because in the conventional watt-hour meter 1, when the first terminal cover 14 is removed, there is no difference in the shapes of the electric wires 11 and 12 and the terminal portions 13 and 13a. is there.
本発明はかかる問題点を解決するために創案されたものである。すなわち本発明の目的は、電力量計の取替え時等において、電源側電線および負荷側電線の接続順番や取り外し順番を間違える虞の少ない電力量計を提供することにある。 The present invention has been made to solve such problems. That is, an object of the present invention is to provide a watt-hour meter that is less likely to make a mistake in the connection order and the removal order of the power-side electric wire and the load-side electric wire when replacing the watt-hour meter.
本発明によれば、接地線（１１ａ，１２ａ）を含む複数の電源側電線（１１）および負荷側電線（１２）と、該各電線を個別に着脱可能に接続する複数の端子部（１３）と、該端子部の全体を覆う第一端子カバー（１４）と、を有する電力量計（１）において、前記端子部と前記第一端子カバーとの間に、前記接地線用の端子部（１３ａ）を覆う第二端子カバー（１６）を備えた、ことを特徴とする電力量計が提供される。 According to the present invention, a plurality of power supply side electric wires (11) and load side electric wires (12) including ground wires (11a, 12a) and a plurality of terminal portions (13) for individually connecting the electric wires in a removable manner. And a watt hour meter (1) having a first terminal cover (14) covering the entirety of the terminal part, the terminal part for the ground wire (between the terminal part and the first terminal cover) A watt hour meter is provided, characterized in that it comprises a second terminal cover (16) covering 13a).
ここで 前記第二端子カバー（１６）が、前記接地線用の端子部（１３ａ）に磁気的に吸着するマグネット（１６１）と、該マグネット上に設けられた絶縁部材（１６２）と、を備えるものであることが好ましい。 The second terminal cover (16) includes a magnet (161) that is magnetically attracted to the terminal portion (13a) for the ground wire, and an insulating member (162) provided on the magnet. It is preferable.
また、前記絶縁部材（１６２）が第二端子カバー（１６）取り外し用の突起部（１６２ａ）を備え、前記第二端子カバーが前記接地線用の端子部（１３ａ）を個別に覆うようにすることもできる。 The insulating member (162) includes a protrusion (162a) for removing the second terminal cover (16), and the second terminal cover individually covers the ground wire terminal (13a). You can also.
また、一つの第二端子カバー（１６）が前記接地線用の端子部（１３ａ）のすべてを覆い、該第二端子カバーが、該接地線用の端子部以外の端子部（１３）を構成する端子締付ネジ（１３０）のネジ止めによって取り付けられていてもよい。 One second terminal cover (16) covers all of the ground wire terminal portions (13a), and the second terminal cover constitutes a terminal portion (13) other than the ground wire terminal portions. It may be attached by screwing a terminal fastening screw (130).
また、前記接地線用の端子部（１３ａ）が第一接地端子（１３１）および第二接地端子（１３２）を有し、該第二端子カバー（１６）が端子締付ネジ（１３０）に取り付けられ、該端子締付ネジを前記第一接地端子にネジ止めしたときに、前記第二端子カバーが前記第二接地端子を覆うように構成することもできる。 The ground wire terminal portion (13a) has a first ground terminal (131) and a second ground terminal (132), and the second terminal cover (16) is attached to the terminal fastening screw (130). In addition, the second terminal cover may be configured to cover the second ground terminal when the terminal fastening screw is screwed to the first ground terminal.
さらに、電力量計の底部に前記第二端子カバー（１６）用の差込穴（５１）を設け、前記第二端子カバーは突起部（１６４）を有する薄板状の形状を有し、前記突起部は前記差込穴に挿入可能であり、前記突起部を前記差込穴に挿入したときに、前記突起部が前記接地線用の端子部（１３ａ）を覆うように構成してもよい。 Further, a plug hole (51) for the second terminal cover (16) is provided at the bottom of the watt-hour meter, and the second terminal cover has a thin plate shape having a protrusion (164), and the protrusion The portion can be inserted into the insertion hole, and when the projection is inserted into the insertion hole, the projection may cover the ground wire terminal portion (13a).
また、前記第二端子カバー（１６）は、スライド前には接地線用の端子部（１３ａ）を覆い接地線用の端子部以外の端子部（１３）を開放する一方、スライド後には接地線用の端子部を開放し接地線用の端子部以外の端子部を覆う格子状に形成された水平方向にスライド移動可能なスライド式シャッター（２２）であることも好ましい。 The second terminal cover (16) covers the ground wire terminal portion (13a) before sliding and opens the terminal portion (13) other than the ground wire terminal portion, while after the slide, the ground wire. It is also preferable that it is a slide type shutter (22) that is formed in a grid shape that opens the terminal portion for use and covers the terminal portions other than the terminal portion for the ground wire and is slidable in the horizontal direction.
ここで、前記スライド式シャッター（２２）は、電力量計の両側の金属面に磁着する対をなす台座（２３）と、対をなす該台座によってその両端を支えられたガイドレール（２４）と、該ガイドレールに沿ってスライド移動可能な格子状のシャッター部（２５）と、から構成されるものとする。 Here, the sliding shutter (22) includes a pair of pedestals (23) magnetically attached to the metal surfaces on both sides of the watt hour meter, and guide rails (24) supported at both ends by the pair of pedestals. And a grid-like shutter section (25) that can slide along the guide rail.
このとき、前記電力量計（１）の底部には、下方から接地線（１１ａ，１２ａ）を接地線用の端子部（１３ａ）に導き入れるための第一開孔（１９ａ）および下方から電源側電線（１１）又は負荷側電線（１２）を端子部（１３）に導き入れるための第二開孔（１９）が形成されており、前記シャッター部（２５）には、スライド前には前記第一開孔を開放するとともに前記第二開孔の全部又は一部を覆って第二開孔内への電源側電線又は負荷側電線の挿入を阻害する一方、スライド後には前記第二開孔を開放して第二開孔への電源側電線又は負荷側電線の挿入を許容する挿入阻止部材（２６）が取り付けられていることが好ましい。 At this time, the bottom of the watt-hour meter (1) has a first opening (19a) for introducing the grounding wires (11a, 12a) into the grounding wire terminal (13a) from below and a power supply from below. A second opening (19) for introducing the side electric wire (11) or the load side electric wire (12) into the terminal portion (13) is formed, and the shutter portion (25) has the above-mentioned before the slide. While opening the first opening and covering all or part of the second opening, the insertion of the power-side electric wire or the load-side electric wire into the second opening is obstructed. It is preferable to attach an insertion preventing member (26) that opens and allows insertion of the power supply side electric wire or the load side electric wire into the second opening.
ここで、前記挿入阻止部材（２６）は、スライド前には前記第二開孔（１９）の一部に被さるように伸長する棒状体、または、スライド前には前記第二開孔（１９）に被さるように伸長し、かつ、スライド後に接地線（１１ａ，１２ａ）を側方から嵌入するための切込部（３３）が形成された短冊状の平板であって、前記シャッター部（２５）をスライドさせて電源側電線（１１）又は負荷側電線（１２）を端子部（１３）に接続した後には、電源側電線又は負荷側電線と当接することでシャッター部の逆方向へのスライドを阻止するものとする。 Here, the insertion blocking member (26) is a rod-like body extending so as to cover a part of the second opening (19) before sliding, or the second opening (19) before sliding. A strip-shaped flat plate formed with a notch (33) for inserting the grounding wires (11a, 12a) from the side after sliding and extending so as to cover the shutter portion (25). After connecting the power supply side electric wire (11) or the load side electric wire (12) to the terminal portion (13), the shutter portion is slid in the reverse direction by contacting the power supply side electric wire or the load side electric wire. Shall be blocked.
このとき、前記挿入阻止部材（２６）の先端を、梁材（３１）によって連結する、ことも好ましい。 At this time, it is also preferable to connect the front-end | tip of the said insertion prevention member (26) by the beam material (31).
さらに、前記シャッター部（２５）には、シャッター部をスライドさせた後の状態で前記第一端子カバー（１４）を取り付けるための小孔（２９）が形成されていることも好ましい。 Furthermore, it is preferable that a small hole (29) for attaching the first terminal cover (14) in a state after the shutter portion is slid is formed in the shutter portion (25).
本発明の電力量計は、前記端子部（１３）と第一端子カバー（１４）との間に、接地線用の端子部（１３ａ）を覆う第二端子カバー（１６）を備えているので、電源側電線（１１）および負荷側電線（１２）の取り外し時、作業者は第二端子カバー（１６）の存在によって接地線用の端子部がどこにあるのかを容易に認識することができ、接地線（１１ａまたは１２ａ）を一番最初に外してしまう虞が減少する。また、作業初期段階では、接地線用の端子部が第二端子カバーによって覆われているため、作業時にドライバー等が当たって端子部間を短絡してしまうこと防ぐことができる。 Since the watt-hour meter of the present invention includes the second terminal cover (16) that covers the ground wire terminal portion (13a) between the terminal portion (13) and the first terminal cover (14). When removing the power supply side electric wire (11) and the load side electric wire (12), the operator can easily recognize where the terminal portion for the ground wire is located by the presence of the second terminal cover (16), The possibility of disconnecting the ground wire (11a or 12a) first is reduced. In addition, since the ground wire terminal portion is covered with the second terminal cover at the initial stage of the work, it is possible to prevent the terminals from being short-circuited by a driver or the like during the work.
ここで、前記第二端子カバー（１６）が、前記接地線用の端子部に磁気的に吸着するマグネット（１６１）と、マグネット上に設けられた絶縁部材（１６２）と、を備えた形態とすれば、第二端子カバーの取り付け取り外しを容易化でき作業性も向上する。 Here, the second terminal cover (16) includes a magnet (161) that is magnetically attracted to the terminal portion for the ground wire, and an insulating member (162) provided on the magnet. If it does so, attachment and removal of a 2nd terminal cover can be made easy and workability | operativity also improves.
さらに、端子部（１３，１３ａ）に被さるスライド式シャッター（２２）を用いることで、接地線用の端子部（１３ａ）とその他の端子部（１３）との被覆を切り替え可能とし、より簡易に電源側電線（１１）および負荷側電線（１２）の接続順番や取り外し順番の間違えを防止することができる。 Furthermore, by using a sliding shutter (22) covering the terminal portions (13, 13a), the covering between the ground wire terminal portion (13a) and the other terminal portions (13) can be switched, which makes it easier. It is possible to prevent mistakes in the connection order and the removal order of the power supply side wires (11) and the load side wires (12).
またスライドさせて電源側電線（１１）又は負荷側電線（１２）を端子部（１３）に接続した後にシャッター部の逆方向へのスライドを制限することで、電源側電線又は負荷側電線を取り外した後でなければ接地線（１１ａ，１２ａ）の取り外しを不可能とすることができ、作業の安全をより一層図ることができる。 In addition, after the power supply side electric wire (11) or the load side electric wire (12) is connected to the terminal portion (13) by sliding, the power source side electric wire or the load side electric wire is removed by restricting the sliding of the shutter portion in the reverse direction. It is impossible to remove the ground wires (11a, 12a) until after the operation is completed, and the work safety can be further enhanced.
以下、本発明の好ましい実施の形態を図面を参照して説明する。 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
図１は、本発明の電力量計の実施の形態を説明するための図である。
図１に示すように、本発明の電力量計１は、図１５で示した従来の電力量計と同様に、メータ本体１０と、電力会社からの電力が導かれる電源側電線１１と、需要家側に電力を導くための負荷側電線１２と、各電線１１，１２を個別に着脱可能に接続する複数の端子部１３とを備えている。端子部１３は凹部１８内に設けられた、第一接地端子１３１および第二接地端子１３２から構成されている。電源側電線１１および負荷側電線１２はそれぞれ接地線１１ａおよび１２ａを備えている。なお電源側電線１１は第一接地端子１３１に、負荷側電線１２は第二接地端子１３２に端子締付ネジ１３０によってそれぞれ一線ずつネジ止めされ接続されている。
またこれらの端子部１３を保護することを目的として、端子部全体は第一端子カバー１４によって覆われている。この第一端子カバー１４は、ネジ１５によって電力量計１に固定されている。
FIG. 1 is a diagram for explaining an embodiment of a watt-hour meter of the present invention.
As shown in FIG. 1, the watt-hour meter 1 of the present invention is similar to the conventional watt-hour meter shown in FIG. A load-side electric wire 12 for guiding electric power to the house side and a plurality of terminal portions 13 for connecting the electric wires 11 and 12 individually and detachably are provided. The terminal portion 13 includes a first ground terminal 131 and a second ground terminal 132 provided in the recess 18. The power supply side electric wire 11 and the load side electric wire 12 are each provided with the grounding wires 11a and 12a. The power supply side electric wire 11 is screwed and connected to the first ground terminal 131 and the load side electric wire 12 to the second ground terminal 132 by terminal fastening screws 130 respectively.
The entire terminal part is covered with a first terminal cover 14 for the purpose of protecting these terminal parts 13. The first terminal cover 14 is fixed to the watt-hour meter 1 with screws 15.
ここで本発明の電力計１は端子部１３と第一端子カバー１４との間に、破線により透視して示した接地線用の端子部１３ａを覆う第二端子カバー１６を備えていることに特徴を有する。本実施例では、第二端子カバー１６はネジ１７によりネジ止めされ、端子部１３ａの全体を覆っている。この第二端子カバー１６はプラスチックのような絶縁部材から構成されている。 Here, the wattmeter 1 of the present invention includes a second terminal cover 16 between the terminal portion 13 and the first terminal cover 14, which covers the ground wire terminal portion 13 a, which is shown through with a broken line. Has characteristics. In this embodiment, the second terminal cover 16 is screwed with screws 17 and covers the entire terminal portion 13a. The second terminal cover 16 is made of an insulating member such as plastic.
電力量計の取替え時等で電源側電線１１および負荷側電線１２を取り外そうとする場合、作業者はまず、第一端子カバー１４を取り外すことになる。このとき、第二端子カバー１６が接地線用の端子部１３ａを覆っているので、作業者は接地線用の端子部１３ａがどこにあるのかを容易に認識することができ、接地線１１ａまたは１２ａを一番最初に外す虞はほとんどない。また、電源側電線１１および負荷側電線１２の取り外し作業初期段階では、接地線用の端子部１３ａが第二端子カバー１６によって覆われているため、作業時にドライバー等がこれに当たったとしても端子部間を短絡してしまうことも防ぐことができる。 When attempting to remove the power supply side electric wire 11 and the load side electric wire 12 when replacing the watt hour meter or the like, the worker first removes the first terminal cover 14. At this time, since the second terminal cover 16 covers the terminal portion 13a for the ground wire, the operator can easily recognize where the terminal portion 13a for the ground wire is located, and the ground wire 11a or 12a. There is almost no fear of removing the first. In the initial stage of removing the power supply side wire 11 and the load side wire 12, the ground wire terminal portion 13 a is covered with the second terminal cover 16, so even if a driver or the like hits it during the operation, the terminal It is also possible to prevent a short circuit between the parts.
図２は、本発明の電力量計の第２の実施例を説明するための図であり、（ａ）は、第二端子カバー１６を取り付けた後の状態を示す図、（ｂ）は第二端子カバー１６のＡ−Ａ断面図である。なお図２では、メータ本体１０および第一端子カバー１４は示していないが、本実施例でも実施例１と同様にこれら部品が用いられる。 2A and 2B are diagrams for explaining a second embodiment of the watt-hour meter of the present invention, in which FIG. 2A shows a state after the second terminal cover 16 is attached, and FIG. It is AA sectional drawing of the two-terminal cover 16. FIG. In FIG. 2, the meter body 10 and the first terminal cover 14 are not shown, but these parts are also used in this embodiment as in the first embodiment.
本実施例の電力量計は、実施の形態１とほぼ同様の構成を有するものであるが、破線により透視して示した接地線用の端子部１３ａを覆う第二端子カバー１６が、図２（ｂ）に示すように、端子部１３ａに磁気的に吸着するマグネット１６１と、マグネット１６１上に設けられた絶縁部材１６２とを備えている点が異なっている。本実施例の第二端子カバー１６は、図２（ａ）に示すようにマグネット１６１が端子部１３ａに磁気的に吸着して固定され、端子部１３ａを個別に覆っている。マグネット１６１は、凹部１８内に挿入できる大きさを有しており、位置決めを容易にすることができるようになっている。絶縁部材１６２の材質はとくに制限されないが、例えばプラスチックが挙げられる。また絶縁部材１６２には、マグネット１６１を端子部１３ａに固定したときに手前方向に伸びる、第二端子カバー取り外し用の突起部１６２ａが形成されている。なお第二端子カバー１６の突起部１６２ａが第一端子カバー１４の取り付けを阻害しないよう、突起部１６２ａに対応する位置の第一端子カバーには開口又は凹みを形成しておくものとする（図示せず）。 The watt-hour meter of the present example has substantially the same configuration as that of the first embodiment. However, the second terminal cover 16 that covers the ground wire terminal portion 13a shown through the broken line is shown in FIG. As shown to (b), the point provided with the magnet 161 magnetically attracted | attached to the terminal part 13a and the insulating member 162 provided on the magnet 161 differs. In the second terminal cover 16 of this embodiment, as shown in FIG. 2A, the magnet 161 is magnetically attracted and fixed to the terminal portion 13a, and individually covers the terminal portion 13a. The magnet 161 has a size that can be inserted into the recess 18 and can be easily positioned. The material of the insulating member 162 is not particularly limited, and examples thereof include plastic. The insulating member 162 is formed with a protrusion 162a for removing the second terminal cover that extends in the forward direction when the magnet 161 is fixed to the terminal portion 13a. Note that an opening or a recess is formed in the first terminal cover at a position corresponding to the protrusion 162a so that the protrusion 162a of the second terminal cover 16 does not hinder the attachment of the first terminal cover 14 (FIG. Not shown).
本実施例の第二端子カバー１６は、実施例１の効果に加え、マグネット１６１が端子部１３ａに磁気的に吸着し、実施例１のようにネジ１７によってネジ止めされていないので、その取り付け、取り外しが容易である。例えば、絶縁部材１６２の突起部を下方に押さえてやれば、テコの原理によって第二端子カバー１６を簡単に取り外すことができる。 In addition to the effects of the first embodiment, the second terminal cover 16 of the present embodiment is magnetically attracted to the terminal portion 13a and is not screwed by the screw 17 as in the first embodiment. Easy to remove. For example, if the protrusion of the insulating member 162 is pressed downward, the second terminal cover 16 can be easily removed according to the lever principle.
図３は、本発明の電力量計の第３の実施例を説明するための図であり、（ａ）は、第二端子カバーを取り付けた後の状態を示す図、（ｂ）は第二端子カバーの正面図であり、（ｃ）は第二端子カバーのＡ−Ａ断面図である。また図４（ａ）は、第二端子カバーを取り付ける前の状態を示す図であり、（ｂ）は端子締付ネジを第二端子カバーの孔部に挿入した状態の、図３（ｂ）におけるＢ−Ｂ断面図である。なお図３および図４では、メータ本体１０および第一端子カバー１４は示していないが、本実施例でも実施例１と同様にこれら部品が用いられる。 FIGS. 3A and 3B are diagrams for explaining a third embodiment of the watt-hour meter of the present invention, FIG. 3A is a diagram showing a state after the second terminal cover is attached, and FIG. It is a front view of a terminal cover, and (c) is an AA sectional view of the 2nd terminal cover. 4A is a view showing a state before the second terminal cover is attached, and FIG. 4B is a view showing a state where the terminal fastening screw is inserted into the hole of the second terminal cover. It is BB sectional drawing in. 3 and 4, the meter body 10 and the first terminal cover 14 are not shown, but these parts are also used in this embodiment as in the first embodiment.
図３（ａ）に示すように一つの第二端子カバー１６が、破線により透視して示した接地線用の端子部１３ａのすべてを覆っている。また、接地線用の端子部１３ａ以外の端子部１３は、第二端子カバー１６を介した端子締付ネジ１３０によってネジ止めされている。図３（ｂ）に示すように、第二端子カバー１６は、端子部１３全体にわたる横方向および縦方向のサイズを有しており、したがって第二端子カバー１６一枚によって接地線用の端子部１３ａのすべてを覆うことができる。第二端子カバー１６は、図３（ｃ）に示すように端子部１３ａに磁気的に吸着するマグネット１６１と、その上の絶縁部材１６２とを備えている。本実施例の第二端子カバー１６は、マグネット１６１が端子部１３ａに磁気的に吸着することにより固定される。第二端子カバー１６は孔部１６３を有し、ここを介して端子締付ネジ１３０がネジ止めされ、端子部１３を構成する。
なお第二端子カバー１６を取り付ける前の状態では、図４（ａ）に示すように接地線用の端子部１３ａ以外の端子部１３には、端子締付ネジ１３０が存在しない。端子締付ネジ１３０は、第二端子カバー１６のマグネット１６１が端子部１３ａに取り付けられた後に、図４（ｂ）に示すように第二端子カバー１６の孔部１６３に挿入されてネジ止めされる。ここで第二端子カバー１６と端子締付ネジ１３０とを予め連結し、一体としてその着脱をするように使用することも可能である。
As shown in FIG. 3 (a), one second terminal cover 16 covers all of the ground wire terminal portions 13a shown in a transparent manner by broken lines. Further, the terminal portions 13 other than the ground wire terminal portion 13 a are screwed with terminal fastening screws 130 via the second terminal cover 16. As shown in FIG. 3B, the second terminal cover 16 has a size in the horizontal direction and the vertical direction over the entire terminal portion 13, and therefore, the terminal portion for the grounding wire is formed by one second terminal cover 16. All of 13a can be covered. As shown in FIG. 3C, the second terminal cover 16 includes a magnet 161 that is magnetically attracted to the terminal portion 13a, and an insulating member 162 thereon. The second terminal cover 16 of this embodiment is fixed by the magnet 161 being magnetically attracted to the terminal portion 13a. The second terminal cover 16 has a hole portion 163 through which the terminal fastening screw 130 is screwed to constitute the terminal portion 13.
In addition, in the state before attaching the 2nd terminal cover 16, as shown to Fig.4 (a), the terminal fastening screw 130 does not exist in the terminal parts 13 other than the terminal part 13a for ground wires. After the magnet 161 of the second terminal cover 16 is attached to the terminal portion 13a, the terminal tightening screw 130 is inserted into the hole 163 of the second terminal cover 16 and screwed as shown in FIG. 4B. The Here, the second terminal cover 16 and the terminal fastening screw 130 may be connected in advance and used so as to be attached and detached as a unit.
本実施例の電力量計によれば、接地線用の端子部１３ａが第二端子カバー１６によって覆われており、かつ、第二端子カバー１６は孔部１６３を介して端子締付ネジ１３０によってネジ止めされているので、電源側電線１１および負荷側電線１２を取り外す場合、作業者は接地線１１ａおよび／または１２ａを一番最初に外してしまうことがない。また、電源側電線１１および負荷側電線１２を取り付ける場合には、図４（ａ）に示すように電力量計本体には接地線用の端子部１３ａの端子締付ネジ１３０しかないので、必ず作業者は接地線１１ａおよび／または１２ａを一番最初に取り付け、その後、第二端子カバー１６の孔部１６３を介して、その他の端子部１３の端子締付ネジ１３０をネジ止めすると同時に電源側電線１１および負荷側電線１２を取り付けることになる。さらに端子部１３の端子締付ネジ１３０のネジ止め時は、第二端子カバー１６がマグネット１６１によって固定され落下することがないので、作業性も良好となる。 According to the watt-hour meter of the present embodiment, the ground wire terminal portion 13 a is covered by the second terminal cover 16, and the second terminal cover 16 is secured by the terminal tightening screw 130 through the hole 163. Since it is screwed, when removing the power supply side electric wire 11 and the load side electric wire 12, the operator does not remove the ground wire 11a and / or 12a first. In addition, when the power supply side wire 11 and the load side wire 12 are attached, the watt hour meter main body has only the terminal tightening screw 130 of the terminal portion 13a for the ground wire as shown in FIG. The operator attaches the ground wire 11a and / or 12a first, and then screws the terminal tightening screws 130 of the other terminal portions 13 through the holes 163 of the second terminal cover 16, and at the same time the power supply side. The electric wire 11 and the load side electric wire 12 are attached. Further, when the terminal fastening screw 130 of the terminal portion 13 is screwed, the second terminal cover 16 is fixed by the magnet 161 and does not fall, so that workability is also improved.
図５は、本発明の電力量計の第４の実施例を説明するための図であり、（ａ）は第二端子カバーを取り付けた後の状態を示す図、（ｂ）は第二端子カバーのＡ−Ａ断面図である。なお図５では、メータ本体１０および第一端子カバー１４は示していないが、本実施例にも実施例１と同様にこれら部品が用いられる。 FIG. 5 is a view for explaining a fourth embodiment of the watt-hour meter of the present invention, (a) is a view showing a state after the second terminal cover is attached, and (b) is a second terminal. It is AA sectional drawing of a cover. Although the meter body 10 and the first terminal cover 14 are not shown in FIG. 5, these parts are used in this embodiment as in the first embodiment.
本実施例の電力量計は、図５（ｂ）に示したように端子締付ネジ１３０が第二端子カバー１６に取り付けられている。例えば第二端子カバー１６は、端子締付ネジ１３０が挿入される開口部を有し（図示せず）、開口部の内側がネジ切りされている。そして端子締付ネジ１３０を第一接地端子１３１にネジ止めしたときに、図５（ａ）に示すように、第二端子カバー１６が第二接地端子１３２を覆うようになっている（第二接地端子１３２は透視図であり破線で表されている）。第二端子カバー１６はプラスチックのような絶縁部材から構成されている。なお、図５（ａ)では第二端子カバー１６が凹部１８の外側で固定されている形態を示しているが、凹部１８内に挿入されてそこで固定されていてもよい。 In the watt-hour meter of this embodiment, a terminal fastening screw 130 is attached to the second terminal cover 16 as shown in FIG. For example, the second terminal cover 16 has an opening (not shown) into which the terminal fastening screw 130 is inserted, and the inside of the opening is threaded. When the terminal fastening screw 130 is screwed to the first ground terminal 131, the second terminal cover 16 covers the second ground terminal 132 as shown in FIG. The ground terminal 132 is a perspective view and is represented by a broken line). The second terminal cover 16 is made of an insulating member such as plastic. Although FIG. 5A shows a form in which the second terminal cover 16 is fixed outside the recess 18, the second terminal cover 16 may be inserted into the recess 18 and fixed there.
本実施例の電力量計によれば、第二接地端子１３２が第二端子カバー１６により覆われているため、電源側電線１１および負荷側電線１２の取り外し時、作業者は第二端子カバー１６の存在によって接地線用の端子部１３ａがどこにあるのかを容易に認識することができ、接地線１１ａまたは１２ａを一番最初に外す虞がない。また仮に誤って端子部１３ａの第一接地端子１３１の端子締付ネジ１３０を外してしまった場合でも、第二端子カバー１６の下の第二接地端子１３２に接地線１１ａまたは１２ａがネジ止めされているため安全である。さらに、第二端子カバー１６が端子締付ネジ１３０に取り付けられているため、電源側電線１１および負荷側電線１２の取り付け時に第二端子カバー１６の付け忘れが起こらない。なお上記説明では下方の端子を第一接地端子１３１としているが、これとは逆に上方の端子を第一接地端子１３１としてもよい。 According to the watt-hour meter of the present embodiment, since the second ground terminal 132 is covered by the second terminal cover 16, when the power-side electric wire 11 and the load-side electric wire 12 are removed, the operator can use the second terminal cover 16. Therefore, it is possible to easily recognize where the terminal portion 13a for the ground wire is located, and there is no possibility of removing the ground wire 11a or 12a first. Even if the terminal fastening screw 130 of the first ground terminal 131 of the terminal portion 13a is accidentally removed, the ground wire 11a or 12a is screwed to the second ground terminal 132 under the second terminal cover 16. So it is safe. Furthermore, since the second terminal cover 16 is attached to the terminal tightening screw 130, forgetting to attach the second terminal cover 16 does not occur when the power supply side electric wire 11 and the load side electric wire 12 are attached. In the above description, the lower terminal is the first ground terminal 131, but the upper terminal may be the first ground terminal 131.
図６は、本発明の電力量計の第５の実施例を説明するための図であり、（ａ）は第二端子カバーを取り付けた後の状態を示す正面図、（ｂ）は電力量計の底面図、（ｃ）は第二端子カバーの平面図であり、（ｄ）は第二端子カバーのＡ−Ａ断面図である。図７（ａ）は、電源側電線および負荷側電線の取り付け時に好適に用いられる端子カバーの平面図であり、（ｂ）は第二端子カバーのＡ−Ａ断面図であり、（ｃ）は該端子カバーを取り付けた後の状態を示す図である。なお図６では、メータ本体１０および第一端子カバー１４は示していないが、本実施例でも実施例１と同様にこれら部品が用いられる。 FIG. 6 is a view for explaining a fifth embodiment of the watt-hour meter of the present invention, (a) is a front view showing a state after the second terminal cover is attached, and (b) is a power amount. (C) is a top view of a 2nd terminal cover, (d) is AA sectional drawing of a 2nd terminal cover. Fig.7 (a) is a top view of the terminal cover used suitably at the time of attachment of a power supply side electric wire and a load side electric wire, (b) is AA sectional drawing of a 2nd terminal cover, (c) is It is a figure which shows the state after attaching this terminal cover. In FIG. 6, the meter main body 10 and the first terminal cover 14 are not shown, but these parts are also used in this embodiment as in the first embodiment.
本実施例の電力量計は、図６（ｂ）に示したように電力量計の底部に第二端子カバー用の差込穴５１を設け、差込穴５１から第二端子カバー１６を差し込んだときに、図６（ａ）に示すように第二端子カバー１６が接地線用の端子部１３ａを覆うようになっている。第二端子カバー１６は、プラスチックのような絶縁部材からなり、図６（ｃ）および（ｄ）に示すように突起部１６４を有する薄板状の形状を有し、突起部１６４は差込穴５１に挿入可能であるとともに、接地線用の端子部１３ａの全体を覆う程度に、伸長している。また第二端子カバー１６は、図６（ｃ）および（ｄ）に示すように電力量計の横方向に伸びる把持部１６５を有し、第二端子カバー１６の取り付け、取り外しを容易にしている。 In the watt hour meter of this embodiment, as shown in FIG. 6B, the insertion hole 51 for the second terminal cover is provided at the bottom of the watt hour meter, and the second terminal cover 16 is inserted from the insertion hole 51. At this time, as shown in FIG. 6A, the second terminal cover 16 covers the terminal portion 13a for the ground wire. The second terminal cover 16 is made of an insulating member such as plastic, and has a thin plate shape having a protruding portion 164 as shown in FIGS. 6C and 6D. The protruding portion 164 is inserted into the insertion hole 51. And extends to the extent that it covers the entire terminal portion 13a for the ground wire. Moreover, the 2nd terminal cover 16 has the holding part 165 extended in the horizontal direction of a watt-hour meter, as shown to FIG.6 (c) and (d), and the attachment and removal of the 2nd terminal cover 16 are made easy. .
本実施例の電力量計によれば、破線により透視して示した接地線用の端子部１３ａが第二端子カバー１６により覆われるため、電源側電線１１および負荷側電線１２の取り外し時、作業者は第二端子カバー１６の存在によって接地線用の端子部１３ａがどこにあるのかを容易に認識することができ、接地線１１ａまたは１２ａを一番最初に外す虞がない。 According to the watt-hour meter of the present embodiment, the ground wire terminal portion 13a shown through the broken line is covered with the second terminal cover 16, so that when the power supply side wire 11 and the load side wire 12 are removed, The person can easily recognize where the terminal portion 13a for the ground wire is located by the presence of the second terminal cover 16, and there is no possibility of removing the ground wire 11a or 12a first.
なお、電源側電線１１および負荷側電線１２の取り付け時は、図７に示す別の端子カバー６１を用いるのが好ましい。図６に示す第二端子カバー１６が接地線用の端子部１３ａを覆うのに対し、端子カバー６１はその他の端子部１３を覆うことができる。端子カバー６１は、図６（ｂ）に示す差込穴５２から差し込んで使用し、差し込んだ後は図７（ｃ）に示すように端子部１３を覆うようになっている。端子カバー６１は、図７（ａ）および（ｂ）に示すように、プラスチックのような絶縁部材からなり、突起部６１１を有する薄板状の形状を有し、差込穴５２に挿入可能であるとともに、端子部１３の全体を覆う程度に、伸長している。また、電力量計の横方向に伸びる把持部６１２を有する。 In addition, when attaching the power supply side electric wire 11 and the load side electric wire 12, it is preferable to use another terminal cover 61 shown in FIG. The second terminal cover 16 shown in FIG. 6 covers the ground wire terminal portion 13 a, whereas the terminal cover 61 can cover the other terminal portions 13. The terminal cover 61 is used by being inserted from the insertion hole 52 shown in FIG. 6B, and after insertion, the terminal portion 13 is covered as shown in FIG. 7C. As shown in FIGS. 7A and 7B, the terminal cover 61 is made of an insulating member such as plastic, has a thin plate shape having a protruding portion 611, and can be inserted into the insertion hole 52. At the same time, it extends to the extent that it covers the entire terminal portion 13. Moreover, it has the holding part 612 extended in the horizontal direction of a watt-hour meter.
このような端子カバー６１を用いることにより、電源側電線１１および負荷側電線１２の取り付け時は、接地線用の端子部１３ａのみが露出しているため、作業者は接地線１１ａまたは１２ａを必ず一番最初に取り付けることになる。 By using such a terminal cover 61, when the power supply side electric wire 11 and the load side electric wire 12 are attached, only the ground wire terminal portion 13a is exposed. Therefore, the operator must always attach the ground wire 11a or 12a. It will be installed first.
図８は、本発明の電力量計の第６の実施例を説明するための斜視図であり、図９（ａ）はメータ本体に取り付けた第二端子カバーのスライド前の状態を示す正面図、（ｂ）は取り付けた第二端子カバーをスライドさせた状態を示す正面図である。なお図では、メータ本体は示していないが、本実施例でも実施例１と同様にこれら部品が用いられる。 FIG. 8 is a perspective view for explaining a sixth embodiment of the watt-hour meter of the present invention, and FIG. 9A is a front view showing a state before the second terminal cover attached to the meter body is slid. (B) is a front view which shows the state which slid the attached 2nd terminal cover. In addition, although the meter main body is not shown in the figure, these parts are used in the present embodiment as in the first embodiment.
本実施例の電力量計は、実施例５のようにメータ本体に差込穴などの改変を加えることなく、既存の電力量計にそのまま適用することができる第二端子カバーを用いたことを特徴とするものである。 The watt-hour meter of the present embodiment uses a second terminal cover that can be applied to an existing watt-hour meter as it is without modifying the insertion hole or the like in the meter body as in the fifth embodiment. It is a feature.
本実施例の電力量計は第二端子カバー以外の部分は従来の単相三線式の電力量計（図１５参照）と同様のものであり、その端子部１３，１３ａは左から順に電源側電線１１、接地線１１ａ、電源側電線１１をネジ止め接続する組と、負荷側電線１２、接地線１２ａ、負荷側電線１２をネジ止め接続する組とから構成され、各組３つの端子部（１３，１３ａ，１３）は等間隔で配置されている。 The watt-hour meter of the present embodiment is the same as the conventional single-phase three-wire watt-hour meter (see FIG. 15) except for the second terminal cover, and its terminal portions 13 and 13a are arranged on the power source side in order from the left. The wire 11, the ground wire 11 a, and the power source side wire 11 are connected by screw connection, and the load side wire 12, the ground wire 12 a, and the load side wire 12 are connected by screw connection. 13, 13a, 13) are arranged at equal intervals.
本実施例の第二端子カバー１６は、図８に示すようなスライド式シャッター２２であり、電力量計の両側の金属面に磁着する水平方向で対をなす台座２３と、対をなす台座２３によってその両端部を支えられ電力量計の前面で水平方向に伸長する上下一対の平行なガイドレール２４と、ガイドレール２４間でこれに沿って水平方向にスライド移動可能な格子状のシャッター部２５とから構成されている。対をなす台座２３とガイドレール２４とは直角をなして連結接合されており、全体として略コの字型をなしている。第二端子カバー１６の取り付けは、端子部１３の正面から略コの字型の開口を挿し込み、台座２３をメータ本体１０の両側の金属面に磁力により吸着することにより行なわれる。 The second terminal cover 16 of the present embodiment is a sliding shutter 22 as shown in FIG. 8, a pair of pedestals 23 in the horizontal direction that are magnetically attached to the metal surfaces on both sides of the watt hour meter, and a pair of pedestals. A pair of upper and lower parallel guide rails 24 supported at both ends by 23 and extending in the horizontal direction on the front surface of the watt-hour meter, and a grid-like shutter portion that is slidable horizontally along the guide rails 24. 25. The pedestal 23 and the guide rail 24 that form a pair are connected and joined at a right angle, and have a substantially U-shape as a whole. The second terminal cover 16 is attached by inserting a substantially U-shaped opening from the front of the terminal portion 13 and attracting the pedestal 23 to the metal surfaces on both sides of the meter body 10 by magnetic force.
複数（4箇所）の窓部２１が形成されたシャッター部２５は、その上下の辺を上下一対の平行なガイドレール２４に摺動自在に嵌め込まれており、隣接する各端子部の距離だけ水平方向に左右にスライド移動することができるようになっている。 The shutter part 25 in which a plurality of (four places) window parts 21 are formed is slidably fitted on a pair of upper and lower parallel guide rails 24 at the upper and lower sides, and is horizontally horizontal by the distance between adjacent terminal parts. It can be slid left and right in the direction.
図９に示したように、スライド式シャッター２２である第二端子カバー１６は、スライド前には接地線用の端子部以外の端子部１３を覆い接地線用の端子部１３ａを開放する一方（図９（ａ））、スライド後には接地線用の端子部以外の端子部１３を開放し接地線用の端子部１３ａを覆うようになっている（図９（ｂ））。すなわちスライド前には接地線用の端子部１３ａにのみ接地線１１ａ，１２ａを接続することができ、接地線用の端子部以外の端子部１３にはシャッター部２５をスライドさせてはじめて電源側電線１１および負荷側電線１２を接続可能となる。 As shown in FIG. 9, the second terminal cover 16 that is the sliding shutter 22 covers the terminal portion 13 other than the ground wire terminal portion and opens the ground wire terminal portion 13a before sliding ( 9A), after sliding, the terminal portions 13 other than the ground wire terminal portions are opened to cover the ground wire terminal portions 13a (FIG. 9B). That is, the ground wires 11a and 12a can be connected only to the terminal portion 13a for the ground wire before the slide, and the power supply side electric wire can be connected only after the shutter portion 25 is slid to the terminal portion 13 other than the terminal portion for the ground wire. 11 and the load side electric wire 12 can be connected.
電源側電線１１、負荷側電線１２、接地線１１ａ，１２ａを各端子部にネジ止め接続した後には、端子部全体は第二端子カバー１６を挟み込んだ状態で第一端子カバー１４によって覆われ、第一端子カバー１４はネジ１５によって電力量計に固定される。
この時、第二端子カバー１６には、第一端子カバー１４に通したネジ１５を、第二端子カバー１６がスライドした状態で貫通させて電力量計のネジ穴２７に螺合させるための小孔２９が形成されている。そのため、第一端子カバー１４は、第二端子カバー１６がスライドした状態でのみ電力量計に固定される。なお第二端子カバー１６がスライドしていない状態では、ネジ穴２７は第二端子カバー１６によって塞がれるため、第一端子カバー１４を電力量計１に固定することができない。
このように第二端子カバー１６をスライドした後にのみ第一端子カバー１４の固定を可能とすることで、第一端子カバーを取り外した際には必ず電源側電線１１および負荷側電線１２用の端子部１３が初めに露出することとなるため、初めに接地線用の端子部１３ａから接地線１１ａ，１２ａを外してしまう虞がほとんどなくなる。
After the power supply side electric wire 11, the load side electric wire 12, and the grounding wires 11a and 12a are screwed and connected to each terminal part, the entire terminal part is covered with the first terminal cover 14 with the second terminal cover 16 sandwiched between them. The first terminal cover 14 is fixed to the watt hour meter by a screw 15.
At this time, the screw 15 passed through the first terminal cover 14 is passed through the second terminal cover 16 in a state where the second terminal cover 16 is slid to be screwed into the screw hole 27 of the watt hour meter. A hole 29 is formed. Therefore, the first terminal cover 14 is fixed to the watt hour meter only when the second terminal cover 16 is slid. When the second terminal cover 16 is not slid, the screw hole 27 is blocked by the second terminal cover 16, so that the first terminal cover 14 cannot be fixed to the watthour meter 1.
Since the first terminal cover 14 can be fixed only after the second terminal cover 16 is slid in this manner, the terminals for the power-side electric wire 11 and the load-side electric wire 12 are always obtained when the first terminal cover is removed. Since the portion 13 is exposed first, there is almost no possibility that the ground wires 11a and 12a are first disconnected from the ground wire terminal portion 13a.
図１０は、本発明の電力量計の第７の実施例を説明するための斜視図であり、図１１（ａ）はメータ本体に取り付けた第二端子カバーのスライド前の状態を示す斜視図、（ｂ）は取り付けた第二端子カバーをスライドさせた状態を示す斜視図、（ｃ）は第二端子カバーをスライドさせた状態で各電線を接続した状態を示した斜視図である。なお図では、メータ本体は示していないが、本実施例でも実施例１と同様にこれら部品が用いられる。 FIG. 10 is a perspective view for explaining a seventh embodiment of the watt-hour meter of the present invention, and FIG. 11 (a) is a perspective view showing a state before the second terminal cover attached to the meter body is slid. (B) is the perspective view which shows the state which slid the attached 2nd terminal cover, (c) is the perspective view which showed the state which connected each electric wire in the state which slid the 2nd terminal cover. In addition, although the meter main body is not shown in the figure, these parts are used in the present embodiment as in the first embodiment.
本実施例の電力量計は、実施例６のようにメータ本体に差込穴などの改変を加えることなく、既存の電力量計にそのまま適用することができ、さらに、電源側電線および負荷側電線を取り外した後でなければ接地線の取り外しができないようにしたことを特徴とするものである。 The watt-hour meter of the present embodiment can be applied to an existing watt-hour meter as it is without modifying the insertion hole or the like in the meter body as in the sixth embodiment. The ground wire can be removed only after the electric wire is removed.
本実施例の電力量計１は第二端子カバー以外の部分は従来の単相三線式の電力量計と同様のものである。ここで図１０および図１１に示したように電力量計１の底部には、下方から接地線１１ａ，１２ａを接地線用の端子部１３ａに導き入れるための円形の第一開孔１９ａおよび下方から電源側電線１１又は負荷側電線１２を端子部１３に導き入れるための円形の第二開孔１９が形成されている。 The watt-hour meter 1 of this embodiment is the same as the conventional single-phase three-wire watt-hour meter except for the second terminal cover. Here, as shown in FIG. 10 and FIG. 11, a circular first opening 19a for introducing the ground wires 11a and 12a from below into the ground wire terminal portion 13a and a lower portion at the bottom of the watt-hour meter 1 A circular second opening 19 for introducing the power supply side electric wire 11 or the load side electric wire 12 into the terminal portion 13 is formed.
本実施例の第二端子カバー１６のシャッター部２５には、実施例６のスライド式シャッター２２のシャッター部に、シャッター部２５の正面からガイドレール２４を回り込んで裏面側に伸長する細長い棒状体である挿入阻止部材２６が４本取り付けられている。挿入阻止部材２６は、スライド前には第二開孔１９の一部に径方向に被さるように伸長して第二開孔内への電源側電線１１および負荷側電線１２の挿入を阻害する一方、スライド後には第二開孔１９を開放して第二開孔内への電線の挿入を可能とする。なお接地線１１ａ，１２ａが挿入される第一開孔１９ａは挿入阻止部材２６のスライド前には開放される一方、スライド後には挿入阻止部材２６がその上面に来ることとなるが、接地線１１ａ，１２ａは既に第一開孔１９ａから接地線用の端子部１３ａに接続されているため、接地線の挿入が挿入阻止部材２６によって阻害されるといる問題はない。
またシャッター部２５のスライドに伴ってスライドする挿入阻止部材２６は、シャッター部２５をスライドさせて電源側電線１１又は負荷側電線１２を端子部１３に接続した後には、電源側電線又は負荷側電線と当接することでシャッター部の逆方向へのスライドを阻止する。すなわち、電源側電線１１又は負荷側電線１２が接続された状態では、シャッター部２５は逆方向へスライドすることができず、この状態では接地線用の端子部１３ａはシャッター部２５によって覆われているため、電源側電線１１又は負荷側電線１２の取り外し前に接地線１１ａ，１２ａの取り外しが行なわれる虞はない。
In the shutter portion 25 of the second terminal cover 16 of the present embodiment, an elongated rod-like body that extends around the guide rail 24 from the front of the shutter portion 25 to the shutter portion of the sliding shutter 22 of Embodiment 6 and extends to the back surface side. Four insertion prevention members 26 are attached. The insertion preventing member 26 extends so as to cover a part of the second opening 19 in the radial direction before sliding and inhibits the insertion of the power supply side wire 11 and the load side wire 12 into the second opening. After the slide, the second opening 19 is opened, and the electric wire can be inserted into the second opening. The first opening 19a into which the ground wires 11a and 12a are inserted is opened before the insertion blocking member 26 is slid, while the insertion blocking member 26 comes to the upper surface after the sliding. , 12a are already connected to the ground wire terminal portion 13a from the first opening 19a, there is no problem that insertion of the ground wire is hindered by the insertion preventing member 26.
Further, the insertion preventing member 26 that slides with the sliding of the shutter portion 25 is configured such that after the shutter portion 25 is slid and the power supply side electric wire 11 or the load side electric wire 12 is connected to the terminal portion 13, the power supply side electric wire or the load side electric wire is connected. To prevent the shutter portion from sliding in the reverse direction. That is, in the state where the power supply side electric wire 11 or the load side electric wire 12 is connected, the shutter portion 25 cannot slide in the reverse direction. In this state, the ground wire terminal portion 13a is covered by the shutter portion 25. Therefore, there is no possibility that the ground wires 11a and 12a are removed before the power supply side wire 11 or the load side wire 12 is removed.
なお図１２に示したように、棒状の各挿入阻止部材２６の先端を梁材３１を用いて連結し、挿入阻止部材２６と梁材３１とで囲まれた空間を通して第一開孔１９ａおよび第二開孔１９に各電線を挿入するようにしてやれば、各電線を取り外す前には第二カバー１６をメータ本体１０から取り外すことができないため、先に接地線用の端子部１３ａから接地線１１ａ，１２ａを外してしまう虞をより一層少なくすことができる。 As shown in FIG. 12, the ends of the rod-shaped insertion blocking members 26 are connected using the beam material 31, and the first opening 19 a and the first hole 19 a are formed through the space surrounded by the insertion blocking member 26 and the beam material 31. If each electric wire is inserted into the two openings 19, the second cover 16 cannot be removed from the meter body 10 before each electric wire is removed. Therefore, the ground wire 11a is first connected to the ground wire terminal portion 13a. , 12a can be further reduced.
図１３に本実施例で用いられる挿入阻止部材の変形例を示した。
この挿入阻止部材２６は、スライド式シャッター２２のシャッター部に、シャッター部２５の正面からガイドレール２４を回り込んで裏面側に伸長し、かつ、スライド後に接地線１１ａ，１２ａを側方から嵌入するための切込部３３が形成された短冊状の平板から構成されている。
FIG. 13 shows a modification of the insertion blocking member used in this embodiment.
The insertion blocking member 26 extends around the guide rail 24 from the front side of the shutter unit 25 and extends to the back side in the shutter unit of the slide type shutter 22, and the ground wires 11 a and 12 a are inserted from the side after sliding. It is comprised from the strip-shaped flat plate in which the notch part 33 for this was formed.
この挿入阻止部材２６によれば、図１４に示したように、スライド前には第二開孔１９は塞がれており電源側電線１１又は負荷側電線１２を端子部１３に接続することが不可能であるとともに、第一開孔１９ａは開放されているため接地線１１ａ，１２ａをその端子部１３ａに接続することができる。一方スライド時には、端子部１３ａに接続した接地線１１ａ，１２ａが、挿入阻止部材２６の切込部３３に側方から嵌入して、第一開孔１９ａがカバーされる一方、第二開孔１９が開放される。 According to this insertion prevention member 26, as shown in FIG. 14, the second opening 19 is closed before the slide, and the power supply side electric wire 11 or the load side electric wire 12 can be connected to the terminal portion 13. In addition, since the first opening 19a is open, the ground wires 11a and 12a can be connected to the terminal portion 13a. On the other hand, at the time of sliding, the ground wires 11a and 12a connected to the terminal portion 13a are fitted into the cut portion 33 of the insertion preventing member 26 from the side to cover the first opening 19a, while the second opening 19 is covered. Is released.
この変形例の挿入阻止部材では、スライド前に第二開孔１９内への電源側電線１１又は負荷側電線１２の挿入が不可能となるため、ほぼ完全に各電線の接続順番や取り外し順番の間違をなくすことができる。 In the insertion blocking member of this modification example, it becomes impossible to insert the power-side electric wire 11 or the load-side electric wire 12 into the second opening 19 before the slide. You can eliminate mistakes.
以上説明したスライド式シャッター２２である第二端子カバー１６を用いた本実施例の電力量計によれば、メータ本体の改変を要することなく簡易に第二端子カバーを端子部に取り付けてやることができる。また、電源側電線１１および負荷側電線１２の取り外しに際しては、第一端子カバー１４を外すと電源側電線１１および負荷側電線１２を接続するための端子部１３のみが露出する一方、接地線用の端子部１３ａは第二端子カバー１６によって覆われているため、接地線１１ａまたは１２ａを一番最初に外す虞がない。そして電源側電線１１や負荷側電線１２を端子部１３から外した後には、第二端子カバー１６をスライド移動させることで、最後に接地線１１ａ，１２ａを簡単に外してやることができる。接地線１１ａ，１２ａの取り付けに際しても、当初２箇所の接地線用の端子部１３ａのみが開放されているため、接地線用の端子部１３ａを明確に認識することができる。接地線を端子部１３ａに取り付けた後には、第二端子カバー１６をスライド移動させ、電源側電線１１および負荷側電線１２を接続するための端子部１３を開放することで容易に電源側電線や負荷側電線の取り付けを行なうことができる。 According to the watt-hour meter of the present embodiment using the second terminal cover 16 that is the sliding shutter 22 described above, the second terminal cover can be easily attached to the terminal portion without requiring modification of the meter body. Can do. Further, when removing the power supply side electric wire 11 and the load side electric wire 12, when the first terminal cover 14 is removed, only the terminal portion 13 for connecting the power supply side electric wire 11 and the load side electric wire 12 is exposed, while for the grounding wire Since the terminal portion 13a is covered with the second terminal cover 16, there is no possibility that the ground wire 11a or 12a is removed first. And after removing the power supply side electric wire 11 and the load side electric wire 12 from the terminal part 13, the grounding wires 11a and 12a can be easily removed finally by sliding the 2nd terminal cover 16. FIG. Even when the ground wires 11a and 12a are attached, since only the two ground wire terminal portions 13a are initially opened, the ground wire terminal portions 13a can be clearly recognized. After the ground wire is attached to the terminal portion 13a, the second terminal cover 16 is slid and the terminal portion 13 for connecting the power-side electric wire 11 and the load-side electric wire 12 is opened. The load side electric wire can be attached.
以上説明した本発明の電力量計は、その電線の接続順番や取り外し順番の間違えを防止するための端子カバーを有することをその骨子とするが、かかる端子カバーは電力量計に限られず、電線の接続順番等が重要な電子機器全般にも応用することができることは勿論である。 The watt-hour meter of the present invention described above has a terminal cover for preventing an error in the connection order and the removal order of the wires, but the terminal cover is not limited to the watt-hour meter. Of course, the present invention can also be applied to all electronic devices in which the order of connection is important.
１ 電力量計
１０ メータ本体
１１ 電源側電線
１２ 負荷側電線
１１ａ，１２ａ 接地線
１３ 端子部
１３ａ 接地線用の端子部
１４ 第一端子カバー
１５ ネジ
１６ 第二端子カバー
１７ ネジ
１９ａ 第一開孔
１９ 第二開孔
２１ 窓部
２２ スライドシャッター
２３ 台座
２４ ガイドレール
２５ シャッター部
２６ 挿入阻止部材
２７ ネジ穴
２９ 小孔
３１ 梁材
３３ 切込部
５１ 差込穴
１３０ 端子締め付けネジ
１３１ 第一接地端子
１３２ 第二接地端子
１６１ マグネット
１６２ 絶縁部材
１６４ 突起部
DESCRIPTION OF SYMBOLS 1 Electricity meter 10 Meter main body 11 Power supply side electric wire 12 Load side electric wire 11a, 12a Grounding wire 13 Terminal part 13a Terminal part for grounding wires 14 First terminal cover 15 Screw 16 Second terminal cover 17 Screw 19a First opening 19 Second opening 21 Window portion 22 Slide shutter 23 Base 24 Guide rail 25 Shutter portion 26 Insertion prevention member 27 Screw hole 29 Small hole 31 Beam material 33 Cut portion 51 Insertion hole 130 Terminal clamping screw 131 First ground terminal 132 First Dual grounding terminal 161 Magnet 162 Insulating member 164 Protrusion
Claims (13)
前記端子部と前記第一端子カバーとの間に、前記接地線用の端子部（１３ａ）を覆う第二端子カバー（１６）を備えた、ことを特徴とする電力量計。 A plurality of power supply side wires (11) and load side wires (12) including ground wires (11a, 12a), a plurality of terminal portions (13) for individually connecting the respective wires in a detachable manner, A watt hour meter (1) having a first terminal cover (14) covering the whole;
A watt-hour meter comprising a second terminal cover (16) covering the terminal portion (13a) for the ground wire between the terminal portion and the first terminal cover.
前記シャッター部（２５）には、スライド前には前記第一開孔を開放するとともに前記第二開孔の全部又は一部を覆って第二開孔内への電源側電線又は負荷側電線の挿入を阻害する一方、スライド後には前記第二開孔を開放して第二開孔への電源側電線又は負荷側電線の挿入を許容する挿入阻止部材（２６）が取り付けられている、ことを特徴とする請求項８に記載の電力量計。 The bottom of the watt-hour meter (1) has a first opening (19a) for introducing the ground wires (11a, 12a) into the ground wire terminal portion (13a) from below and a power supply side electric wire (from below) ( 11) or the second opening (19) for introducing the load side electric wire (12) into the terminal portion (13) is formed,
Before the slide, the shutter part (25) opens the first opening and covers all or a part of the second opening so that the power-side electric wire or the load-side electric wire is inserted into the second opening. An insertion blocking member (26) is attached that inhibits insertion, but opens the second opening and allows insertion of the power supply side electric wire or the load side electric wire into the second opening after sliding. The watt-hour meter according to claim 8, characterized in that
前記シャッター部（２５）をスライドさせて電源側電線（１１）又は負荷側電線（１２）を端子部（１３）に接続した後には、電源側電線又は負荷側電線と当接することでシャッター部の逆方向へのスライドを阻止する、ことを特徴とする請求項９に記載の電力量計。 The insertion blocking member (26) is a rod-like body that extends so as to cover a part of the second opening (19) before sliding,
After the shutter portion (25) is slid and the power supply side electric wire (11) or the load side electric wire (12) is connected to the terminal portion (13), the shutter portion (25) is brought into contact with the power supply side electric wire or the load side electric wire. The watt-hour meter according to claim 9, wherein sliding in the reverse direction is prevented.
前記シャッター部（２５）をスライドさせて電源側電線（１１）又は負荷側電線（１２）を端子部（１３）に接続した後には、電源側電線又は負荷側電線と当接することでシャッター部の逆方向へのスライドを阻止する、ことを特徴とする請求項９に記載の電力量計。 The insertion blocking member (26) extends so as to cover the second opening (19) before sliding, and a notch for inserting the ground wires (11a, 12a) from the side after sliding. (33) is a strip-shaped flat plate formed,
After the shutter portion (25) is slid and the power supply side electric wire (11) or the load side electric wire (12) is connected to the terminal portion (13), the shutter portion (25) is brought into contact with the power supply side electric wire or the load side electric wire. The watt-hour meter according to claim 9, wherein sliding in the reverse direction is prevented.
The small hole (29) for attaching the first terminal cover (14) in a state after the shutter portion is slid, is formed in the shutter portion (25). The electricity meter as described in.
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| JP2005369310A JP4738162B2 (en) | 2005-12-22 | 2005-12-22 | Electricity meter |
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| JP2005369310A JP4738162B2 (en) | 2005-12-22 | 2005-12-22 | Electricity meter |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015184227A (en) * | 2014-03-26 | 2015-10-22 | 関西電力株式会社 | Stationary terminal with built-in current transformers |
| KR101591192B1 (en) * | 2014-08-26 | 2016-02-04 | 김근효 | Earth check tester device for socket |
| JP5913719B1 (en) * | 2015-11-25 | 2016-04-27 | 九州電力株式会社 | Short-circuit prevention cover |
| JP2020085693A (en) * | 2018-11-27 | 2020-06-04 | 中国電力株式会社 | Watthour meter and fixture |
| KR102298149B1 (en) * | 2020-05-29 | 2021-09-07 | 한국전력공사 | Protection device of electric meter |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005216838A (en) * | 2004-01-30 | 2005-08-11 | Hitachi Lighting Ltd | Terminal block |
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- 2005-12-22 JP JP2005369310A patent/JP4738162B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005216838A (en) * | 2004-01-30 | 2005-08-11 | Hitachi Lighting Ltd | Terminal block |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015184227A (en) * | 2014-03-26 | 2015-10-22 | 関西電力株式会社 | Stationary terminal with built-in current transformers |
| KR101591192B1 (en) * | 2014-08-26 | 2016-02-04 | 김근효 | Earth check tester device for socket |
| JP5913719B1 (en) * | 2015-11-25 | 2016-04-27 | 九州電力株式会社 | Short-circuit prevention cover |
| JP2020085693A (en) * | 2018-11-27 | 2020-06-04 | 中国電力株式会社 | Watthour meter and fixture |
| JP7200626B2 (en) | 2018-11-27 | 2023-01-10 | 中国電力株式会社 | Electricity meter and fixture |
| KR102298149B1 (en) * | 2020-05-29 | 2021-09-07 | 한국전력공사 | Protection device of electric meter |
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| JP4738162B2 (en) | 2011-08-03 |
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