JP6297429B2 - Electricity meter switch - Google Patents

Electricity meter switch Download PDF

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JP6297429B2
JP6297429B2 JP2014132909A JP2014132909A JP6297429B2 JP 6297429 B2 JP6297429 B2 JP 6297429B2 JP 2014132909 A JP2014132909 A JP 2014132909A JP 2014132909 A JP2014132909 A JP 2014132909A JP 6297429 B2 JP6297429 B2 JP 6297429B2
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JP2016012447A (en
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浅野 薫生
薫生 浅野
直人 川島
直人 川島
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Osaka Denki Co Ltd
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本発明は、電力量計の電源側の配線と負荷側の配線との間の接続を断続する電力量計の開閉器に関するものである。   The present invention relates to a switch for a watt hour meter that intermittently connects a power source side wiring and a load side wiring of the watt hour meter.

従来この種の電力量計の開閉器としては、例えば、特許文献1に開示されたものがある。この電力量計の開閉器では、配線として使用している金属板を横置きとし、重ねて配線できるようにしている。この構成により、配線として使用している金属板を縦形にした場合に、組立作業で細心の配慮が必要であった配線の位置決め作業が容易化され、組立作業性が向上する。   Conventionally, as this type of watt-hour meter switch, there is one disclosed in Patent Document 1, for example. In the switch of this watt-hour meter, the metal plate used as wiring is placed horizontally so that it can be wired in layers. With this configuration, when the metal plate used as the wiring is in a vertical shape, the wiring positioning work that requires careful consideration in the assembling work is facilitated, and the assembling workability is improved.

特許文献1に開示された電力量計のように配線として使用する金属板を横置きとし、配線を貫通させる電流検出器を用いて電流を検出する、開閉器を内蔵した電力量計は、従来、図1や図2等に示すように構成される。電力量計は外部接続する電線の並びが規定されており、電力量計の配線はこの並びに応じて配列されている。   A watt-hour meter with a built-in switch that detects a current using a current detector penetrating the wiring, with a metal plate used as a wiring horizontally like the watt-hour meter disclosed in Patent Document 1, 1 and FIG. 2 etc. are comprised. The watt hour meter defines the arrangement of externally connected wires, and the wiring of the watt hour meter is arranged according to this arrangement.

図1は、単相3線式電力量計1Aにおける開閉器の構成例を示す平面図である。同図に示されるように、電力量計1Aの端子部1aに入出力される電源側の配線2,3と負荷側の配線4,5,6とは、端子部1aを貫通して電力量計外部へ突出して設けられ、所定間隔で平行に配列されている。電力量計1Aは、端子金具を内包する端子ブロックが端子部1aから分離されて構成される方式のもので、外部からの電線は端子ブロックに内包された端子金具に接続される。電力量計本体には、端子金具に接続される配線2〜6のみが具備される。   FIG. 1 is a plan view showing a configuration example of a switch in a single-phase three-wire watt-hour meter 1A. As shown in the figure, the power supply side wirings 2 and 3 and the load side wirings 4, 5, and 6 that are input to and output from the terminal unit 1 a of the watt-hour meter 1 </ b> A penetrate through the terminal unit 1 a. It protrudes outside the meter and is arranged in parallel at a predetermined interval. The watt-hour meter 1A is of a type in which a terminal block including a terminal fitting is separated from the terminal portion 1a, and an external electric wire is connected to the terminal fitting included in the terminal block. Only the wiring 2-6 connected to a terminal metal fitting is comprised in the watt-hour meter main body.

配線2〜5には負荷に供給される電流が流れ、この電流は配線3,5が挿通されている電流検出器7によって検出される。また、配線6は単相3線の中性線に接続されて、中性線の電圧を検出する。この中性線は端子ブロックで電源側と負荷側の配線とが短絡されている。単相3線の電圧線の電圧は、配線2,3から検出される。   A current supplied to the load flows through the wirings 2 to 5, and this current is detected by the current detector 7 through which the wirings 3 and 5 are inserted. Moreover, the wiring 6 is connected to the neutral wire of the single-phase three wires, and detects the voltage of the neutral wire. This neutral wire is a terminal block in which the power supply side and the load side wiring are short-circuited. The voltage of the single-phase three-wire voltage line is detected from the wirings 2 and 3.

電力量計1Aの内部には2個の単極の開閉器8,9が組み込まれている。開閉器8,9は開閉器支持体10に固定されており、開閉器8,9の端子8a,8b,9a,9bと配線2,5,3,4とはねじ11で接続されている。開閉器8,9は内蔵した駆動部8c,9cによって接点が開閉されることで、電源側配線2および負荷側配線5間、並びに電源側配線3および負荷側配線4間の接続を断続する。   Two unipolar switches 8 and 9 are incorporated in the watt-hour meter 1A. The switches 8 and 9 are fixed to the switch support 10, and the terminals 8 a, 8 b, 9 a, 9 b of the switches 8, 9 and the wirings 2, 5, 3, 4 are connected by screws 11. The contacts of the switches 8 and 9 are opened and closed by the built-in drive units 8 c and 9 c, thereby intermittently connecting the power supply side wiring 2 and the load side wiring 5 and the power supply side wiring 3 and the load side wiring 4.

図2は、双極の開閉器12が組み込まれた単相3線式電力量計1Bの構成例を示す平面図である。なお、同図において図1と同一部分には同一符号を付してその説明は省略する。開閉器12は開閉器支持体13に固定されており、この例では、開閉器12の一方側の端子が電源側の配線14,15になっている。他方側の端子12a,12bは電流検出器7を貫通して、負荷側の配線16,17にねじ11で接続されている。開閉器12は内蔵した駆動部12cによって接点が開閉される。接点の開閉方向は図の紙面に垂直な方向になっており、駆動部12cは接点部の上方の紙面手前側に位置している。   FIG. 2 is a plan view showing a configuration example of a single-phase three-wire watt-hour meter 1B in which the bipolar switch 12 is incorporated. In the figure, the same parts as those in FIG. The switch 12 is fixed to a switch support 13. In this example, terminals on one side of the switch 12 are wirings 14 and 15 on the power supply side. The other terminals 12 a and 12 b penetrate the current detector 7 and are connected to the load-side wirings 16 and 17 by screws 11. The contact of the switch 12 is opened and closed by a built-in drive unit 12c. The opening / closing direction of the contact is a direction perpendicular to the paper surface of the drawing, and the drive unit 12c is positioned on the front side of the paper surface above the contact portion.

開閉器12の端子12a,12bと配線17,16との接続は、端子12a,12bに電流検出器7を通して開閉器支持体13に開閉器12を固定した後、配線16,17を開閉器支持体13に固定して行うか、または、配線16,17を開閉器支持体13に固定した後に、端子12a,12bに電流検出器7を通して開閉器12を開閉器支持体13に固定して行う。   The terminals 12a and 12b of the switch 12 are connected to the wirings 17 and 16 by fixing the switch 12 to the switch support 13 through the current detector 7 to the terminals 12a and 12b, and then supporting the wirings 16 and 17 with the switch. Or after fixing the wirings 16 and 17 to the switch support 13, the switch 12 is fixed to the switch support 13 through the terminals 12 a and 12 b through the current detector 7. .

特開平11−14665号公報Japanese Patent Laid-Open No. 11-14665

しかしながら、上記従来の図1に示す2個の単極の開閉器8,9を内蔵した電力量計1Aでは、開閉器8,9と配線2〜5とを接続するときに、配線3,5に電流検出器7を挿通させながら所定位置に組み込む必要がある。このため、組立作業時における配線3,5や電流検出器7といった部品の扱いが非常に不安定となり、組み立て難く、結果として組立工数が増えることになる。また、ねじ11を使って接続するので、ねじ11の材料費がかかる。さらに、ねじ11の締結トルクの管理や、ねじ締結時のトルクによる配線2〜5の正規位置からの変位を管理する必要も生じ、製造時における検査等の管理項目が増大する。   However, in the watt-hour meter 1A incorporating the two single-pole switches 8 and 9 shown in FIG. 1 in the prior art, when the switches 8 and 9 are connected to the wires 2 to 5, the wires 3 and 5 are connected. It is necessary to incorporate the current detector 7 into a predetermined position while inserting the current detector 7 therethrough. For this reason, the handling of parts such as the wirings 3 and 5 and the current detector 7 at the time of assembling work becomes very unstable and difficult to assemble, resulting in an increase in the number of assembling steps. Further, since the screws 11 are used for connection, the material cost of the screws 11 is increased. Furthermore, it is necessary to manage the fastening torque of the screw 11 and to manage the displacement of the wires 2 to 5 from the normal position due to the torque at the time of screw fastening, and management items such as inspection during manufacturing increase.

また、上記従来の電力量計1Aのように、電力量計内部の限られた空間に複数個搭載する開閉器8,9は、小型にする必要がある。小型にした場合には、開閉器8,9の内部導体の長さは短くなり、温度上昇の製品規格を満たす上では有利になる。しかし、反面、小型にすることで内部導体の断面積が減少したり、ばね性を確保するために内部導体にリン青銅などのばね性銅合金を利用する場合もあるので、内部導体の抵抗値が上昇し、結果として温度上昇をもたらすことがある。このため、製品としては、温度上昇を抑制するために電流が流れる配線の断面積を増大することとなり、その結果材料費の上昇を招くことになる。さらに、ねじ11による配線締結部も、温度上昇促進の一因となる。   In addition, like the conventional watt hour meter 1A, a plurality of switches 8 and 9 mounted in a limited space inside the watt hour meter must be small. In the case of downsizing, the lengths of the inner conductors of the switches 8 and 9 are shortened, which is advantageous in satisfying the product standard for temperature rise. However, by reducing the size of the internal conductor, the cross-sectional area of the internal conductor may be reduced, or a spring copper alloy such as phosphor bronze may be used for the internal conductor to ensure the spring property. May increase, resulting in an increase in temperature. For this reason, as a product, the cross-sectional area of the wiring through which the current flows is increased in order to suppress the temperature rise, resulting in an increase in material cost. Furthermore, the wiring fastening part by the screw 11 also contributes to the promotion of temperature rise.

また、上記従来の図2に示す双極の開閉器12を内蔵した電力量計1Bでは、配線14〜17の配列ピッチが制約されているため、電源側の配線15に負荷側の配線16が隣接し、図の下側の端子部1a側から配線14,15に電流検出器7を通すことは出来ない。このため、開閉器12の上部側の端子12a,12bに電流検出器7を通してから、負荷側の配線16,17を端子12a,12bにねじ11で締結することになる。このため、端子部1a側から配線14,15に電流検出器7を通す場合に比べて、配線接続に工数がかかる。   Further, in the watt-hour meter 1B incorporating the bipolar switch 12 shown in FIG. 2 above, the arrangement pitch of the wirings 14 to 17 is restricted, so that the load-side wiring 16 is adjacent to the power-side wiring 15. However, the current detector 7 cannot be passed through the wirings 14 and 15 from the terminal portion 1a on the lower side of the figure. For this reason, after passing the current detector 7 through the terminals 12a and 12b on the upper side of the switch 12, the wirings 16 and 17 on the load side are fastened to the terminals 12a and 12b with the screws 11. For this reason, compared with the case where the current detector 7 is passed through the wires 14 and 15 from the terminal portion 1a side, man-hours are required for wire connection.

また、端子12a,12bと配線16,17との間を可撓電線で中継すると、電流検出器7の配置などで自由度が増すが、可撓電線を曲線的に操り、電流検出器7に貫通させて、可撓電線の両端部をねじで締結することになるため、工数が増えてしまう。   In addition, when the flexible wires are relayed between the terminals 12a and 12b and the wires 16 and 17, the degree of freedom increases due to the arrangement of the current detector 7 and the like. Since it penetrates and the both ends of a flexible electric wire will be fastened with a screw, man-hours will increase.

また、図1に示す電力量計1Aにおける開閉器8,9と比較すると、電力量計1Bにおける開閉器12では、ねじ11の締結箇所が削減されるものの、ねじ11による締結箇所は残る。このため、ねじ11の締結トルクの管理やねじ11の締結による配線14〜17の変位の監視といった製造管理がやはり必要となり、また、ねじ締結工数も発生する。   Moreover, compared with the switches 8 and 9 in the watt-hour meter 1A shown in FIG. 1, in the switch 12 in the watt-hour meter 1B, the number of fastening points of the screw 11 is reduced, but the fastening point of the screw 11 remains. For this reason, manufacturing management such as management of the fastening torque of the screw 11 and monitoring of the displacement of the wirings 14 to 17 by fastening of the screw 11 is still necessary, and the number of screw fastening steps is also generated.

また、電力量計1Aにおける開閉器8,9および電力量計1Bにおける開閉器12共に、開閉器単体が完結した組立品となっているため、開閉器部を小型化するには限度がある。また、配線3〜5および配線16,17が立体交差するため、配線組み立て後における配線5,16に隠れた異物や異常の目視がし難い。また、開閉器8,9と配線2〜5または開閉器12と配線14〜17を、開閉器支持体10または13に固定する固定部材が必要になる。   In addition, since both the switches 8 and 9 in the watt hour meter 1A and the switch 12 in the watt hour meter 1B are an assembly in which the single switch is completed, there is a limit to downsizing the switch unit. Further, since the wires 3 to 5 and the wires 16 and 17 are three-dimensionally crossed, it is difficult to visually observe foreign matters and abnormalities hidden in the wires 5 and 16 after the wires are assembled. Moreover, the fixing member which fixes the switches 8 and 9 and the wiring 2-5 or the switch 12 and the wiring 14-17 to the switch support 10 or 13 is needed.

本発明はこのような課題を解決するためになされたもので、
電力量計の端子部に所定間隔で平行に配列される電源側の配線と負荷側の配線との間の接続を断続する電力量計の開閉器において、
電源側または負荷側の通電電流が計測される計測側の配線は、基体に取り付けられてこの基体から突出する直線状部分に電流検出器が挿入され、
通電電流が計測されない非計測側の配線は、計測側の配線の直線状部分から離れる方向に曲げられることで、直線状部分に挿入される電流検出器との間に距離がとられて基体に取り付けられ、
電源側または負荷側の一方の側の配線の端部に固定接点が設けられ、他方の側の配線の端部に可動自在に接続された可動板に、固定接点に当接される可動接点が設けられ、
基体の面に平行な方向に移動自在に基体に取り付けられて可動板を連結する連結部材と、
基体の面に平行な方向に連結部材を駆動して、可動接点の固定接点に対する相対位置を可変させる駆動部材と
を備えることを特徴とする。
The present invention has been made to solve such problems,
In the switch of the watt hour meter that intermittently connects the wiring on the power source side and the wiring on the load side arranged in parallel at a predetermined interval to the terminal part of the watt hour meter,
The wiring on the measurement side where the energization current on the power supply side or the load side is measured is attached to the base body, and a current detector is inserted in a linear portion protruding from the base body.
The wiring on the non-measurement side where the energization current is not measured is bent away from the linear portion of the measurement-side wiring, so that a distance is taken between the current detector inserted in the linear portion and the substrate. Attached,
A fixed contact is provided at the end of the wiring on one side of the power supply side or the load side, and a movable contact abutting on the fixed contact is provided on a movable plate movably connected to the end of the other side of the wiring. Provided,
A connecting member that is attached to the base so as to be movable in a direction parallel to the surface of the base and connects the movable plate;
And a drive member that drives the connecting member in a direction parallel to the surface of the base to change the relative position of the movable contact to the fixed contact.

本構成によれば、非計測側の配線が、これと平行に配列された計測側の配線の直線状部分から離れる方向に曲げられることで、非計測側の配線と計測側の配線の直線状部分との間に距離がとられる。このため、電力量計の端子部において所定間隔で平行に配列されて隣接する配線との間に距離が無くても、上記のように非計測側の配線との間に距離がとられた計測側の配線の直線状部分に、電流検出器を配置することができる。この電流検出器の組み込みは、非計測側の配線を基体に取り付ける前に、計測側の配線を基体に取り付けて固定し、基体から突出する計測側の配線の直線状部分に電流検出器を直線的に通すことで、容易に行える。   According to this configuration, the non-measurement-side wiring is bent in a direction away from the linear portion of the measurement-side wiring arranged in parallel with the non-measurement-side wiring and the measurement-side wiring is linear. A distance is taken between the parts. For this reason, even if there is no distance between adjacent wires arranged in parallel at a predetermined interval at the terminal part of the watt-hour meter, the distance between the non-measurement side wires as described above is taken. A current detector can be arranged on the straight line portion of the side wiring. This current detector is built in by attaching the measurement-side wiring to the base and fixing it before attaching the non-measurement-side wiring to the base, and linearly connecting the current detector to the linear portion of the measurement-side wiring protruding from the base. It can be done easily by passing it through.

また、従来のように、完結した組立品となっている開閉器を組み込むのではなく、電源側または負荷側の一方の側の配線の端部に固定接点、他方の側の配線の端部に可動自在に接続された可動板に可動接点を設けて接点開閉機構を構成するので、完結した組立品となっている開閉器の端子と配線との間をねじで接続する必要がなくなる。このため、ねじを一切使わずに開閉器を構成することが出来るので、ねじを使うことで必要となる締結トルクの管理や配線位置の変位の管理といった製造管理は不要となる。また、従来のように、配線に電流検出器を挿通した不安定な状態で、配線と開閉器の端子とをねじで接続する組み立て難い作業をすることなく、接点開閉機構の組み立てと同工程で容易に電流検出器を組み込むことができる。この結果、開閉器は、接続信頼性が向上すると共に、組立工数が低減する。   Also, instead of incorporating a switch that is a complete assembly as in the past, a fixed contact is provided at the end of the wiring on one side of the power supply side or the load side, and at the end of the wiring on the other side. Since the movable contact point is provided on the movable plate that is movably connected to constitute the contact opening / closing mechanism, it is not necessary to connect the terminal of the switch and the wiring, which is a complete assembly, with a screw. For this reason, since the switch can be configured without using any screws, manufacturing management such as management of fastening torque and management of displacement of wiring positions required by using screws becomes unnecessary. In addition, in the unstable state where the current detector is inserted into the wiring as in the past, the same process as the assembly of the contact switching mechanism is performed without the difficult task of connecting the wiring and the terminal of the switch with screws. A current detector can be easily incorporated. As a result, the switch has improved connection reliability and reduced assembly man-hours.

また、完結した組立品となっている開閉器を電力量計内に組み込むのではなく、必須となる配線をそのまま開閉器内の内部導体にして上記のように接点開閉機構を独自に構成するので、電力量計に内蔵する開閉器を小型化することができる。また、従来のように、完結した組立品となっている開閉器を小型にすることで内部導体の断面積が減少したり、ばね性を確保するために内部導体にリン青銅などのばね性銅合金を利用することで、開閉器が電力量計内部で高温源となることはない。しかも、ねじ接続部が上記のように無いので、ねじによる配線締結部が、電力量計内部で高温源となることもない。したがって、配線の通電電流容量を適度な電流容量に設定し、全体的に熱容量バランスのとれた放熱特性を確保することが出来る。   In addition, instead of incorporating a complete switch in the watt-hour meter, the contact switching mechanism is uniquely configured as described above using the essential wiring as it is as the internal conductor in the switch. The switch built in the watt-hour meter can be miniaturized. In addition, by reducing the size of the switch, which is a complete assembly as in the past, the cross-sectional area of the inner conductor is reduced, and in order to ensure the spring property, spring copper such as phosphor bronze is used for the inner conductor. By using the alloy, the switch does not become a high temperature source inside the watt hour meter. And since there is no screw connection part as mentioned above, the wiring fastening part by a screw | thread does not become a high temperature source inside a watt-hour meter. Therefore, it is possible to set the current carrying capacity of the wiring to an appropriate current capacity, and to ensure the heat radiation characteristics with a balanced heat capacity as a whole.

また、本発明は、電源側および負荷側の各配線が、基体に設けられた溝もしくはピンに嵌合することで、または基体に設けられた突起に挟まれることで、基体の面方向における少なくとも2方向の動きが拘束され、基体を覆うカバーが被されることで、または基体に設けられた爪に挟まれることで、面方向に垂直な方向における動きが拘束されることを特徴とする。   In addition, the present invention provides a power supply side load and a load side wiring that are fitted into grooves or pins provided in the base, or sandwiched between protrusions provided in the base, so that at least in the surface direction of the base. The movement in the two directions is restricted, and the movement in the direction perpendicular to the surface direction is restricted by being covered with a cover that covers the base or being sandwiched between claws provided on the base.

本構成によれば、各配線は、基体の面方向における動きが基体に設けられた溝もしくはピンまたは突起によって拘束され、面方向に垂直な方向における動きが基体を覆うカバーまたは基体に設けられた爪によって拘束される。このため、各配線の基体への固定は、特別な固定部材を使用すること無く、基体自体のみで、または基体とこれを覆うカバーとで、行うことができる。また、基体に設けられた溝もしくはピンまたは突起により、基体の面方向における動きが拘束されることで、開閉器から突出する配線と電力量計に接続される外部電線とのねじ締結時に生じるトルクによって、配線位置が変位するのが抑制される。   According to this configuration, the movement of each wiring in the surface direction of the base is constrained by the grooves, pins, or protrusions provided in the base, and the movement in the direction perpendicular to the surface is provided in the cover or base covering the base. Restrained by nails. For this reason, each wiring can be fixed to the base body by using only the base body or the base body and a cover covering the base body without using a special fixing member. In addition, the torque generated at the time of screw fastening between the wire protruding from the switch and the external electric wire connected to the watt hour meter by restraining the movement in the surface direction of the substrate by the groove or pin or protrusion provided on the substrate This suppresses the displacement of the wiring position.

また、本発明は、固定接点および可動接点の周囲の基体部分のみを覆うカバーを備えることを特徴とする。   In addition, the present invention is characterized by including a cover that covers only the base portion around the fixed contact and the movable contact.

本構成によれば、カバーの大きさが抑制されるため、カバーの材料費が低減される。また、固定接点および可動接点間の開閉に伴って生じる塵の移動をカバーで覆われた部分内に止め、機器内に拡散するのを防止することができる。また、カバーで覆われない開放空間を大きく確保できるので、機器内の温度上昇を抑制することができる。   According to this configuration, since the size of the cover is suppressed, the material cost of the cover is reduced. In addition, it is possible to prevent the movement of dust that occurs with the opening and closing between the fixed contact and the movable contact within the portion covered with the cover, and prevent the dust from being diffused into the device. Moreover, since the open space which is not covered with a cover can be ensured largely, the temperature rise in an apparatus can be suppressed.

また、本発明は、電源側および負荷側の各配線が、お互いに交差すること無く基体に取り付けられることを特徴とする。   Further, the present invention is characterized in that the power supply side and load side wirings are attached to the substrate without crossing each other.

本構成によれば、従来の、配線が立体交差するために配線に隠れた異物や異常の目視がし難くなるという問題は、生じなくなる。   According to this configuration, the conventional problem that it is difficult to visually observe foreign matters or abnormalities hidden in the wiring due to the three-dimensional intersection of the wiring does not occur.

また、本発明は、
連結部材の一部が基体の反対面側に突出し、
駆動部材が、基体の反対面側に設けられて連結部材の前記一部と連結される
ことを特徴とする。
The present invention also provides:
A part of the connecting member protrudes on the opposite side of the base,
The driving member is provided on the opposite surface side of the base and is connected to the part of the connecting member.

本構成によれば、配線は基体の一面側に、駆動部材は基体の反対面側に設けられるので、配線と駆動部材との間に電気絶縁距離をとって絶縁強度を確保することができる。また、配線と駆動部材との間には磁気的距離もとられ、配線を流れる電流によって生成される電磁界の影響が、電磁的に駆動される駆動部材に及び難くなる。また、この電磁界の影響が大きい場合には、駆動部材の基体への取付面などに電磁シールド板を設けることで、この電磁界の影響を低減することができる。また、開閉器の外部から電磁界の影響を受ける場合には、駆動部材を覆う側の面に電磁シールド板を設けることで、外部からの電磁界の影響を低減することができる。また、これら電磁シールド板の取り付けは、駆動部材が設けられる基体の反対面側に配線が無いので、容易に行うことができる。   According to this configuration, since the wiring is provided on one surface side of the base and the driving member is provided on the opposite surface of the base, it is possible to secure an insulation strength by taking an electrical insulation distance between the wiring and the driving member. Further, a magnetic distance is provided between the wiring and the driving member, and the influence of the electromagnetic field generated by the current flowing through the wiring becomes difficult to reach the electromagnetically driven driving member. Further, when the influence of the electromagnetic field is large, the influence of the electromagnetic field can be reduced by providing an electromagnetic shield plate on the mounting surface of the drive member to the base. Moreover, when receiving the influence of the electromagnetic field from the outside of the switch, the influence of the electromagnetic field from the outside can be reduced by providing an electromagnetic shield plate on the surface that covers the driving member. In addition, these electromagnetic shield plates can be easily attached because there is no wiring on the opposite side of the base on which the drive member is provided.

本発明によれば、接続信頼性が向上すると共に組立工数が低減し、さらに、全体的に熱容量バランスのとれた放熱特性を確保できる電力量計の開閉器が小型に提供される。   ADVANTAGE OF THE INVENTION According to this invention, connection reliability improves, an assembly man-hour reduces, Furthermore, the switch of the watt-hour meter which can ensure the thermal radiation characteristic with which heat capacity balance was entirely provided is provided small.

従来の電力量計の開閉器の第1の構成例を示す平面図である。It is a top view which shows the 1st structural example of the switch of the conventional watt-hour meter. 従来の電力量計の開閉器の第2の構成例を示す平面図である。It is a top view which shows the 2nd structural example of the switch of the conventional watt-hour meter. 本発明の一実施の形態による電力量計の開閉器の構成を概略的に示す平面図である。It is a top view which shows roughly the structure of the switch of the watt-hour meter by one embodiment of this invention. 一実施の形態による電力量計の開閉器を裏面側から見た分解斜視図である。It is the disassembled perspective view which looked at the switch of the watt-hour meter by one Embodiment from the back surface side. (a)は、一実施の形態による電力量計の開閉器の裏面側における配線の拘束構造を説明するための平面図、(b)は縦断面図、(c)は一部横断面図である。(A) is a top view for demonstrating the restraint structure of the wiring in the back surface side of the switch of the watt-hour meter by one Embodiment, (b) is a longitudinal cross-sectional view, (c) is a partial cross-sectional view. is there. 一実施の形態による電力量計の開閉器における接点開閉機構の一部拡大平面図である。It is a partially expanded plan view of the contact switching mechanism in the switch of the watt-hour meter according to the embodiment. (a)は、一実施の形態による電力量計の開閉器の裏面側の斜視図、(b)は、表面側の斜視図である。(A) is a perspective view of the back surface side of the switch of the watt-hour meter by one Embodiment, (b) is a perspective view of the surface side. 図7(b)に示す一実施の形態による電力量計の開閉器をA−A線で破断して矢視方向から見た横断面図である。It is the cross-sectional view which fractured | ruptured the switch of the watt-hour meter by one Embodiment shown in FIG.7 (b) by the AA line, and was seen from the arrow direction. (a)は、一実施の形態による電力量計の開閉器における可動板の変形例を示す斜視図、(b)は同可動板により構成される接点開閉機構の一部平面図である。(A) is a perspective view which shows the modification of the movable plate in the switch of the watt-hour meter by one Embodiment, (b) is a partial top view of the contact switching mechanism comprised by the movable plate. (a)は、第1の変形例による電力量計の開閉器の概略構成を示す平面図、(b)は、第2の変形例による電力量計の開閉器の概略構成を示す平面図である。(A) is a top view which shows schematic structure of the switch of the watt-hour meter by a 1st modification, (b) is a top view which shows schematic structure of the switch of the watt-hour meter by a 2nd modification. is there.

次に、本発明による電力量計の開閉器を単相3線式電子式電力量計の開閉器に適用した、本発明を実施するための形態について説明する。   Next, the form for implementing this invention which applied the switch of the watt-hour meter by this invention to the switch of the single-phase three-wire type electronic watt-hour meter is demonstrated.

図3は、本発明の一実施の形態による単相3線式電子式電力量計21の開閉器22の概略構成を示す平面図である。   FIG. 3 is a plan view showing a schematic configuration of the switch 22 of the single-phase three-wire electronic watt-hour meter 21 according to the embodiment of the present invention.

電力量計21は、電源側の配線23,24と負荷側の配線25,26,27とが、図の下端部の端子部21aに入出力される。各配線23〜27は、金属板からなり、図示しない端子ブロックに接続される外部電線の配列に応じて所定間隔で平行に配列され、端子部21aを貫通して電力量計外部へ突出して設けられている。電力量計21は、端子金具を内包する端子ブロックが端子部21aから分離されて構成される方式のもので、外部電線は端子ブロックに内包された端子金具に接続される。電力量計本体には、端子ブロックが具備されず、端子金具に接続される配線23〜27のみが具備される。   In the watt-hour meter 21, power supply side wirings 23, 24 and load side wirings 25, 26, 27 are input / output to / from a terminal portion 21a at a lower end portion in the drawing. Each of the wirings 23 to 27 is made of a metal plate, and is arranged in parallel at a predetermined interval according to the arrangement of external electric wires connected to a terminal block (not shown), and is provided to project outside the watt hour meter through the terminal portion 21a. It has been. The watt-hour meter 21 has a configuration in which a terminal block including a terminal fitting is separated from the terminal portion 21a, and an external electric wire is connected to the terminal fitting included in the terminal block. The watt-hour meter main body is not provided with a terminal block, and is provided only with wires 23 to 27 connected to the terminal fitting.

配線23〜26には負荷に供給される電流が流れ、この電流は配線25,26が挿通されている電流検出器28によって検出される。また、配線27は単相3線の中性線に接続されて、中性線の電圧を検出する。この中性線は端子ブロックで電源側と負荷側の配線とが短絡されている。単相3線の電圧線の電圧は、配線23,24から検出される。電力量計21は、電流検出器28によって検出される電流、および各配線23,24,27から検出される電圧に基づいて、負荷側の配線25〜27に接続される負荷機器で消費される電力量を演算する。また、開閉器22は、電力量計21に内蔵された図示しない制御回路からの指令に応じて、電源側の配線23,24と負荷側の配線25,26との間の接続を断続する。   A current supplied to the load flows through the wirings 23 to 26, and this current is detected by a current detector 28 through which the wirings 25 and 26 are inserted. Moreover, the wiring 27 is connected to the neutral wire of the single-phase three wires, and detects the voltage of the neutral wire. This neutral wire is a terminal block in which the power supply side and the load side wiring are short-circuited. The voltage of the single-phase three-wire voltage line is detected from the wirings 23 and 24. The watt-hour meter 21 is consumed by load equipment connected to the load-side wirings 25 to 27 based on the current detected by the current detector 28 and the voltages detected from the wirings 23, 24 and 27. Calculate the amount of power. Further, the switch 22 disconnects the connection between the power supply side wirings 23 and 24 and the load side wirings 25 and 26 in response to a command from a control circuit (not shown) built in the watt hour meter 21.

開閉器22は、基体であるベース29に各配線23〜26、電流検出器28、連結部材30および駆動部材31が取り付けられて、構成されている。電源側および負荷側の各配線23〜26は、お互いに交差すること無くベース29に取り付けられている。各配線23〜26、電流検出器28および連結部材30はベース29の裏面に取り付けられ、駆動部材31だけがベース29の表面に取り付けられている。電源側の配線23,24と負荷側の配線25,26との間に形成される接点機構部には、ベース29の裏面において、点線で示すカバー32が被されている。   The switch 22 is configured by attaching wires 23 to 26, a current detector 28, a connecting member 30, and a driving member 31 to a base 29 that is a base. The power supply side and load side wirings 23 to 26 are attached to the base 29 without crossing each other. Each of the wires 23 to 26, the current detector 28 and the connecting member 30 are attached to the back surface of the base 29, and only the driving member 31 is attached to the surface of the base 29. A contact mechanism portion formed between the power supply side wirings 23 and 24 and the load side wirings 25 and 26 is covered with a cover 32 indicated by a dotted line on the back surface of the base 29.

図4は、図3に示す電力量計21の開閉器22を裏側から見た、開閉器22の分解斜視図である。   FIG. 4 is an exploded perspective view of the switch 22 when the switch 22 of the watt-hour meter 21 shown in FIG. 3 is viewed from the back side.

ベース29は、電気絶縁性を有する樹脂が成型されて構成されている。このベース29への各部品の組み込みは、連結部材30、負荷側配線25,26、電流検出器28、電源側配線23,24および円筒コイルばね37,37が、この順にベース29に取り付けられ、カバー32が被されることで、行われる。   The base 29 is configured by molding an electrically insulating resin. Each component is incorporated into the base 29 by connecting the connecting member 30, the load side wires 25 and 26, the current detector 28, the power source side wires 23 and 24, and the cylindrical coil springs 37 and 37 to the base 29 in this order. This is done by covering the cover 32.

連結部材30も、電気絶縁性を有する樹脂が成型されて構成されており、ベース29に形成された溝29aに取り付けられる。溝29aの幅は連結部材30の幅より広く形成されており、連結部材30は、その幅方向に移動自在に溝29aに収容されることで、ベース29の底面に平行な方向に移動自在に、ベース29に取り付けられる。   The connecting member 30 is also formed by molding an electrically insulating resin, and is attached to a groove 29 a formed in the base 29. The width of the groove 29 a is formed wider than the width of the connecting member 30, and the connecting member 30 is accommodated in the groove 29 a so as to be movable in the width direction thereof, so that it can be moved in a direction parallel to the bottom surface of the base 29. And attached to the base 29.

負荷側配線25,26は、電源側配線23,24または負荷側配線25,26のうちの通電電流が計測される計測側の配線になっており、ベース29に取り付けられて、このベース29から突出する直線状部分に電流検出器28が挿入される。電流検出器28は、矩形状の貫通孔が中心部に形成された一対の磁気コア41,41、各磁気コア41,41と各配線25,26との相互位置を保持するケース42を備えて、構成される。ケース42は、電気絶縁性を有する樹脂などから形成され、配線25,26が挿通されて配線25,26の周囲を囲む筒状部42a,42aを備える。ケース42は、筒状部42a,42aに配線25,26を収容することで、電流検出用磁気コア41,41と配線25,26との相互位置を保持すると共に、これらの間を電気的に絶縁分離する。電流検出用磁気コア41,41は、配線25,26に電流が流れると、電流の流れに応じた磁気を生じさせる。   The load-side wirings 25 and 26 are measurement-side wirings for measuring the energization current of the power-side wirings 23 and 24 or the load-side wirings 25 and 26, and are attached to the base 29. The current detector 28 is inserted into the protruding linear portion. The current detector 28 includes a pair of magnetic cores 41 and 41 each having a rectangular through hole formed in the center thereof, and a case 42 that holds the mutual positions of the magnetic cores 41 and 41 and the wirings 25 and 26. Configured. The case 42 is formed of an electrically insulating resin or the like, and includes cylindrical portions 42 a and 42 a through which the wirings 25 and 26 are inserted and surround the wirings 25 and 26. The case 42 accommodates the wires 25 and 26 in the cylindrical portions 42a and 42a, thereby maintaining the mutual positions of the current detection magnetic cores 41 and 41 and the wires 25 and 26, and electrically connecting them. Isolate. When a current flows through the wirings 25 and 26, the current detection magnetic cores 41 and 41 generate magnetism corresponding to the current flow.

図5(a)は、図4に示す各配線23〜27がベース29に組み込まれた状態における開閉器22の裏面側の平面図、同図(b)は配線23,26の組み込み部の縦断面図、同図(c)は配線25,26の組み込み部の部分横断面図である。これらの図では、各配線23〜27がベース29および端子部21aに拘束される部分が太い線で示されている。なお、図5において図4と同一部分には同一符号を付してその説明は省略する。   5A is a plan view of the back side of the switch 22 in a state in which the wirings 23 to 27 shown in FIG. 4 are incorporated in the base 29, and FIG. FIG. 3C is a partial cross-sectional view of the part where the wirings 25 and 26 are incorporated. In these drawings, portions where the wires 23 to 27 are restrained by the base 29 and the terminal portion 21a are indicated by thick lines. 5 that are the same as those in FIG. 4 are given the same reference numerals, and descriptions thereof are omitted.

負荷側配線25,26は、それぞれに形成された穴25a,26aがベース29に設けられた柱状のピン29c,29cに嵌合することで、ベース29に対する取り付け位置が規定される。これら負荷側配線25,26は、直線状部分と反対側のベース29に収納される側が図示するように曲げられ、連結部材30の上部を覆って、それぞれの端部がベース29の溝29b,29bに挿入される。なお、図5において連結部材30の図示は省略している。負荷側配線25,26のこれら各端部には、固定接点33,33がかしめられている。また、負荷側配線25,26の各直線状部分は、同図(c)に示すように、ベース29に設けられた腕29d,29dの先端に形成された爪29e,29eにより、両縁上部が挟まれている。腕29d,29dは弾性を有し、負荷側配線25,26が取り付けられるときに爪29e,29eが押し拡げられることで反り返り、負荷側配線25,26がベース29に取り付けられると爪29e,29eを元の位置に戻して、負荷側配線25,26の両縁上部に爪29e,29eを掛ける。   The load-side wirings 25, 26 are fitted to columnar pins 29 c, 29 c provided in the base 29 by holes 25 a, 26 a formed in the load-side wirings 25, 26, respectively. These load-side wirings 25 and 26 are bent as shown in the drawing so that the side accommodated in the base 29 opposite to the linear portion covers the upper part of the connecting member 30, and the respective ends are grooves 29 b and 29b is inserted. In addition, illustration of the connection member 30 is abbreviate | omitted in FIG. Fixed contacts 33 and 33 are caulked at these ends of the load side wirings 25 and 26. Further, each linear portion of the load side wirings 25 and 26 is formed at the upper end of both edges by claws 29e and 29e formed at the tips of the arms 29d and 29d provided on the base 29 as shown in FIG. Is sandwiched. The arms 29d and 29d have elasticity, and when the load side wirings 25 and 26 are attached, the claws 29e and 29e are warped by being expanded, and when the load side wirings 25 and 26 are attached to the base 29, the claws 29e and 29e. Is returned to the original position, and the claws 29e, 29e are hung on the upper portions of both edges of the load side wirings 25, 26.

負荷側配線25,26の端部が挿入された溝29b,29bは、ベース29底面の面方向における負荷側配線25,26の動きを、面方向における垂直方向および水平方向に拘束している。また、各ピン29c,29cは、負荷側配線25,26の穴25a,26aに嵌合することで、ベース29底面の面方向における負荷側配線25,26の動きを、面方向における垂直方向および水平方向に拘束している。したがって、負荷側配線25,26は、ベース29に設けられた溝29b,29bに端部が嵌合すると共に、ベース29に設けられたピン29c,29cに穴25a,26aが嵌合することで、ベース29の面方向における少なくとも2方向の動きが拘束されている。   The grooves 29b and 29b into which the end portions of the load side wirings 25 and 26 are inserted constrain the movement of the load side wirings 25 and 26 in the surface direction of the bottom surface of the base 29 in the vertical direction and the horizontal direction in the surface direction. The pins 29c and 29c are fitted into the holes 25a and 26a of the load-side wirings 25 and 26, so that the movement of the load-side wirings 25 and 26 in the surface direction of the bottom surface of the base 29 is changed in the vertical direction in the surface direction and Restrained horizontally. Therefore, the load-side wirings 25 and 26 are fitted with grooves 29b and 29b provided in the base 29 at their ends, and holes 25a and 26a are fitted into the pins 29c and 29c provided in the base 29. The movement of at least two directions in the surface direction of the base 29 is restricted.

また、爪29e,29eは、負荷側配線25,26の各直線状部分の両縁上部を挟むことで、ベース29底面の面方向に垂直な方向おける負荷側配線25,26の動きを、その直線状部分で拘束している。また、カバー32は、負荷側配線25,26の固定接点33,33が設けられた端部を覆うことで、ベース29底面の面方向に垂直な方向おける負荷側配線25,26の動きを、その端部で拘束している。したがって、負荷側配線25,26は、直線状部分の両縁上部が爪29e,29eで挟まれると共に、ベース29にカバー32が被されることで、ベース29底面の面方向に垂直な方向おける動きが拘束されている。   Further, the claws 29e and 29e sandwich the upper portions of the respective linear portions of the load side wirings 25 and 26, thereby causing the load side wirings 25 and 26 to move in a direction perpendicular to the surface direction of the bottom surface of the base 29. Restrained by a straight portion. Further, the cover 32 covers the end portions of the load side wirings 25 and 26 where the fixed contacts 33 and 33 are provided, so that the movement of the load side wirings 25 and 26 in the direction perpendicular to the surface direction of the bottom surface of the base 29 is reduced. Restrained at that end. Therefore, the load-side wirings 25 and 26 are arranged in a direction perpendicular to the surface direction of the bottom surface of the base 29 by covering the base 29 with the cover 32 while the upper edges of the linear portions are sandwiched between the claws 29e and 29e. The movement is constrained.

本実施形態では、負荷側配線25,26は、さらに、電力量計21の端子部21aに設けられた筒状ガイド穴21b,21bに直線状部が挿通されることで、面方向および面方向に垂直な方向の動きが堅固に拘束されている。また、負荷側配線25,26の間の負荷側配線27も、同様に、電力量計21の端子部21aに設けられた筒状ガイド穴21cに挿通されることで、面方向および面方向に垂直な方向の動きが堅固に拘束されている。   In the present embodiment, the load-side wirings 25 and 26 are further inserted into the cylindrical guide holes 21b and 21b provided in the terminal portion 21a of the watt-hour meter 21 so that the linear portions are inserted into the surface direction and the surface direction. The movement in the direction perpendicular to is firmly restrained. Similarly, the load-side wiring 27 between the load-side wirings 25 and 26 is also inserted in the cylindrical guide hole 21c provided in the terminal portion 21a of the watt-hour meter 21, so that the surface direction and the surface direction are increased. Vertical movement is firmly constrained.

電源側配線23,24は、通電電流が計測されない非計測側の配線になっており、ベース29の面方向において、計測側の負荷側配線25,26の直線状部分から離れる方向に曲げられることで、その直線状部分に挿入される電流検出器28との間に距離がとられて、ベース29に取り付けられる。この電源側配線23,24のベース29への組み込みは、電源側配線23,24の垂直に曲げられた部分が、ベース29に設けられた溝29f,29fに挿入されることで、行われる。   The power supply side wirings 23 and 24 are non-measurement side wirings in which an energization current is not measured, and are bent in a direction away from the linear portions of the measurement side load side wirings 25 and 26 in the surface direction of the base 29. Thus, a distance is taken between the current detector 28 inserted in the linear portion and the current detector 28 is attached to the base 29. The incorporation of the power supply side wirings 23 and 24 into the base 29 is performed by inserting vertically bent portions of the power supply side wirings 23 and 24 into grooves 29f and 29f provided in the base 29.

この溝29f,29fは、ベース29底面の面方向における電源側配線23,24の動きを、ベース29底面の面方向における垂直方向および水平方向に拘束している。また、カバー32は、電源側配線23,24の垂直に曲げられた部分の端部を覆うことで、ベース29底面の面方向に垂直な方向おける電源側配線23,24の動きを拘束している。したがって、電源側配線23,24は、ベース29に設けられた溝29f,29fに嵌合することで、ベース29の面方向における少なくとも2方向の動きが拘束され、ベース29にカバー32が被されることで、ベース29底面の面方向に垂直な方向おける動きが拘束されている。本実施形態では、電源側配線23,24は、さらに、電力量計21の端子部21aに設けられた筒状ガイド穴21d,21dに挿通されることで、面方向および面方向に垂直な方向の動きが堅固に拘束されている。   These grooves 29f and 29f restrain the movement of the power supply side wirings 23 and 24 in the surface direction of the bottom surface of the base 29 in the vertical and horizontal directions in the surface direction of the bottom surface of the base 29. In addition, the cover 32 covers the ends of the vertically bent portions of the power supply side wirings 23 and 24, thereby restricting the movement of the power supply side wirings 23 and 24 in the direction perpendicular to the surface direction of the bottom surface of the base 29. Yes. Therefore, the power supply side wirings 23 and 24 are fitted into grooves 29f and 29f provided in the base 29, so that movement in at least two directions in the surface direction of the base 29 is restricted, and the cover 29 is covered with the base 29. Thus, the movement in the direction perpendicular to the surface direction of the bottom surface of the base 29 is restricted. In the present embodiment, the power supply side wires 23 and 24 are further inserted into the cylindrical guide holes 21d and 21d provided in the terminal portion 21a of the watt-hour meter 21 so as to be perpendicular to the surface direction and the surface direction. The movement is firmly restrained.

電源側配線23,24には図4に示すように電圧検出用のリード線接続部23a,24aが設けられており、このリード線接続部23a,24aは、電源側配線23,24がベース29に取り付けられることで、図5(b)および後述する図7(b)に示すようにベース29の表面側に突出する。   As shown in FIG. 4, the power supply side wirings 23 and 24 are provided with voltage detection lead wire connection portions 23a and 24a. The lead wire connection portions 23a and 24a have the power supply side wirings 23 and 24 as the base 29. As shown in FIG. 5B and FIG. 7B described later, the base 29 protrudes to the surface side.

また、電源側配線23,24の端部には可動板34,34が可動自在に接続されている。本実施形態では、図6に示す接点機構部の一部拡大平面図に示すように、電源側配線23,24の端部と可動板34,34の端部との間に可撓電線35,35が溶接接続されることで、電源側配線23,24の端部に可動板34,34が可動自在に接続されている。可動板34,34には、固定接点33,33に当接される可動接点36,36がかしめられており、また、軸34b,34bが絞り加工によって形成されている。   In addition, movable plates 34 and 34 are movably connected to end portions of the power supply side wirings 23 and 24. In the present embodiment, as shown in the partially enlarged plan view of the contact mechanism portion shown in FIG. 6, the flexible electric wire 35, between the end portions of the power supply side wirings 23, 24 and the end portions of the movable plates 34, 34, The movable plates 34 and 34 are movably connected to the end portions of the power supply side wires 23 and 24 by welding the 35. Movable contacts 36 and 36 that are in contact with the fixed contacts 33 and 33 are caulked on the movable plates 34 and 34, and shafts 34b and 34b are formed by drawing.

電源側配線23,24がベース29に取り付けられる際、可動板34,34は、曲げ加工された先端部34a,34aが連結部材30の切り欠き部30a,30aに嵌合させられると共に、軸34b,34bがベース29に形成された軸受け29g,29gに嵌合させられる。可動板34,34の先端部34a,34aと切り欠き部30a,30aとの嵌合により、可動板34,34は連結部材30によって連結される。また、可動板34,34の軸34b,軸34bと軸受け29g,29gとの嵌合により、可動板34,34は軸34b,軸34を中心に回動自在にベース29に取り付けられ、可動接点36,36は軸34b,軸34bを中心に回動する。   When the power supply side wirings 23, 24 are attached to the base 29, the movable plates 34, 34 are fitted with the bent end portions 34a, 34a in the notches 30a, 30a of the connecting member 30 and the shaft 34b. , 34b are fitted into bearings 29g, 29g formed on the base 29. The movable plates 34 and 34 are connected to each other by the connecting member 30 by fitting the leading ends 34a and 34a of the movable plates 34 and 34 to the notches 30a and 30a. In addition, the movable plates 34 and 34 are attached to the base 29 so as to be rotatable about the shaft 34b and the shaft 34 by fitting the shafts 34b and 34b of the movable plates 34 and 34 with the bearings 29g and 29g. 36 and 36 rotate around a shaft 34b and a shaft 34b.

また、ベース29に設けられた溝29h,29hには、弾性体を構成する円筒コイルばね37,37が圧縮された状態で収容される。円筒コイルばね37,37は、可動板34,34を軸34b,軸34bを中心に時計回りに回動させて、固定接点33,33が設けられた配線25,26側へ可動板34,34を押圧する。この押圧により、可動板34,34に設けられた可動接点36,36が固定接点33,33に押し付けられ、可動接点36,36および固定接点33,33間の接点圧が生じる。   Further, the cylindrical coil springs 37, 37 constituting the elastic body are accommodated in the grooves 29h, 29h provided in the base 29 in a compressed state. The cylindrical coil springs 37, 37 rotate the movable plates 34, 34 clockwise about the shaft 34b, the shaft 34b, and move to the wirings 25, 26 side where the fixed contacts 33, 33 are provided. Press. By this pressing, the movable contacts 36, 36 provided on the movable plates 34, 34 are pressed against the fixed contacts 33, 33, and a contact pressure between the movable contacts 36, 36 and the fixed contacts 33, 33 is generated.

カバー32は、固定接点33,33および可動接点36,36の周囲のベース29部分のみを覆う。図7(a)は、カバー32がベース29に取り付けられた状態における開閉器22の裏面側の斜視図である。なお、図7において図4と同一部分には同一符号を付してその説明は省略する。   The cover 32 covers only the base 29 portion around the fixed contacts 33 and 33 and the movable contacts 36 and 36. FIG. 7A is a perspective view of the back surface side of the switch 22 in a state where the cover 32 is attached to the base 29. 7 that are the same as those in FIG. 4 are given the same reference numerals, and descriptions thereof are omitted.

図7(b)は開閉器22の表面側の斜視図である。開閉器22の表面側のベース29にには駆動部材31が設けられ、駆動部材31はベース29に形成された一対の爪29i,29iに挟まれてベース29に固定される。駆動部材31は、電磁コイルの中心に鉄心38が挿入されて構成されており、鉄心38の先端部38aは露出している。この先端部38aは、駆動部材31がベース29に取り付けられることで、開閉器22の表面に一部突出した連結部材30の端部30bに嵌合して、連結部材30に連結される。   FIG. 7B is a perspective view of the surface side of the switch 22. A drive member 31 is provided on the base 29 on the surface side of the switch 22, and the drive member 31 is fixed to the base 29 by being sandwiched between a pair of claws 29 i and 29 i formed on the base 29. The drive member 31 is configured by inserting an iron core 38 at the center of the electromagnetic coil, and a tip end portion 38a of the iron core 38 is exposed. When the driving member 31 is attached to the base 29, the distal end portion 38 a is fitted to the end portion 30 b of the connecting member 30 that partially protrudes from the surface of the switch 22, and is connected to the connecting member 30.

図8は、駆動部材31が取り付けられた図7(b)に示す開閉器22を破断線A−Aで破断して、矢視方向から見た横断面図である。なお、図8において図4〜図7と同一部分には同一符号を付してその説明は省略する。   FIG. 8 is a cross-sectional view of the switch 22 shown in FIG. 7B to which the drive member 31 is attached, taken along the breaking line AA and viewed from the direction of the arrows. In FIG. 8, the same parts as those in FIGS.

駆動部材31は、ベース29の取付面に平行な方向に連結部材30を駆動して、可動接点36,36の固定接点33に対する相対位置を可変させて、接点間の開閉を行わせる。つまり、駆動部材31は、電磁コイルが励磁されて生じる吸引力により、鉄心38の先端部38aを引き込む。そして、この引き込む力が、円筒コイルばね37,37の伸張する弾性に打ち勝つことで、鉄心38の先端部38aに端部30bが連結された連結板30および可動板34を図の右方へ駆動して、可動接点36,36を固定接点33から引き離す。鉄心38の先端部38aが引き込まれたこの状態は、駆動部材31に備えられた図示しない永久磁石によって鉄心38が吸引されることで、保持される。   The drive member 31 drives the connecting member 30 in a direction parallel to the mounting surface of the base 29 to change the relative positions of the movable contacts 36 and 36 with respect to the fixed contact 33, thereby opening and closing the contacts. That is, the drive member 31 pulls the tip end portion 38a of the iron core 38 by the attractive force generated by exciting the electromagnetic coil. The pulling force overcomes the elasticity of the cylindrical coil springs 37, 37, thereby driving the connecting plate 30 and the movable plate 34 having the end 30b connected to the tip 38a of the iron core 38 to the right in the figure. Then, the movable contacts 36 and 36 are separated from the fixed contact 33. This state in which the distal end portion 38 a of the iron core 38 is pulled in is held by the iron core 38 being attracted by a permanent magnet (not shown) provided in the drive member 31.

また、駆動部材31は、電磁コイルが逆側に励磁されて生じる吸引力により、引き込んだ鉄心38の先端部38aを押し出し、これに連結された連結板30および可動板34を図の左方へ駆動して、可動接点36,36を固定接点33に当接させる。この当接状態は、円筒コイルばね37,37によって加勢されるが、駆動部材31に備えられた永久磁石により、保持される。駆動部材31は、このように電磁的に駆動されるので、外周が磁性体金属で覆われることで、駆動部材31の外部への電磁界の干渉と、駆動部材31の内部への電磁界の干渉とが防がれている。   Further, the driving member 31 pushes out the leading end portion 38a of the drawn iron core 38 by the attractive force generated by exciting the electromagnetic coil on the opposite side, and the connecting plate 30 and the movable plate 34 connected thereto are moved to the left in the drawing. By driving, the movable contacts 36 and 36 are brought into contact with the fixed contact 33. This abutting state is urged by the cylindrical coil springs 37, 37, but is held by a permanent magnet provided in the drive member 31. Since the driving member 31 is electromagnetically driven in this way, the outer periphery is covered with the magnetic metal, so that the electromagnetic field interference to the outside of the driving member 31 and the electromagnetic field to the inside of the driving member 31 are covered. Interference is prevented.

このような本実施形態による電力量計21の開閉器22によれば、非計測側の電源側配線23,24が、これと平行に配列された計測側の負荷側配線25,26の直線状部分から図4,図5に示すように離れる方向に曲げられることで、非計測側の電源側配線23,24と計測側の負荷側配線25,26の直線状部分との間に距離がとられる。このため、電力量計21の端子部21aにおいて所定間隔で平行に配列されて隣接する配線24と配線25との間に図3,図5に示すように距離が無くても、上記のように電源側配線23,24との間に距離がとられた負荷側配線25,26の直線状部分に、電流検出器28を図5に示すように配置することができる。この電流検出器28の組み込みは、電源側配線23,24をベース29に取り付ける前に、負荷側配線25,26をベース29に取り付けて固定し、ベース29から突出する負荷側配線25,26の直線状部分に電流検出器28を直線的に通すことで、容易に行える。   According to the switch 22 of the watt-hour meter 21 according to the present embodiment, the non-measurement-side power supply-side wirings 23 and 24 are linearly connected to the measurement-side load-side wirings 25 and 26 arranged in parallel therewith. 4 and 5, the distance between the non-measurement side power supply side wirings 23, 24 and the measurement side load side wirings 25, 26 is increased. It is done. Therefore, even if there is no distance between adjacent wirings 24 and 25 arranged in parallel at predetermined intervals in the terminal portion 21a of the watt-hour meter 21 as shown in FIGS. 3 and 5, as described above. The current detector 28 can be arranged as shown in FIG. 5 on the straight portions of the load side wires 25 and 26 that are spaced apart from the power source side wires 23 and 24. The current detector 28 is assembled by attaching the load side wirings 25 and 26 to the base 29 and fixing them before attaching the power source side wirings 23 and 24 to the base 29, and connecting the load side wirings 25 and 26 protruding from the base 29. This can be easily done by passing the current detector 28 linearly through the linear portion.

また、従来の図1、図2に示す電力量計1A、1Bのように、完結した組立品となっている開閉器8,9、12を組み込むのではなく、計測側の負荷側配線25,26の端部に固定接点33,33、非計測側の電源側配線23,24の端部に可動自在に接続された可動板34,34に可動接点36,36を設けて、接点開閉機構を構成するので、完結した組立品となっている開閉器8,9、12の端子8a,8b,9a,9b、12a,12bと配線2〜5、16,17との間をねじ11で接続する必要がなくなる。このため、ねじ11を一切使わずに開閉器22を構成することが出来るので、ねじ11を使うことで必要となる締結トルクの管理や配線位置の変位の管理といった製造管理は不要となる。また、従来の図1に示す電力量計1Aのように、配線3,5に電流検出器7を挿通した不安定な状態で、配線3,5と開閉器8,9の端子8b,9aとをねじ11で接続する組み立て難い作業をすることなく、接点開閉機構の組み立てと同工程で容易に電流検出器28をベース29に組み込むことができる。この結果、本実施形態の開閉器22は、接続信頼性が向上すると共に、組立工数が低減する。   Further, unlike the conventional watt-hour meters 1A and 1B shown in FIGS. 1 and 2, the load side wiring 25, The movable contacts 36 and 36 are provided on the movable plates 34 and 34 that are movably connected to the ends of the non-measurement-side power supply side wirings 23 and 24 at the end of the non-measurement side. Since it comprises, the terminal 8a, 8b, 9a, 9b, 12a, 12b of the switch 8, 9, 12 which is a completed assembly is connected with the wiring 2-5, 16, 17 with the screw 11. There is no need. For this reason, since the switch 22 can be configured without using any screws 11, manufacturing management such as management of fastening torque and management of displacement of wiring positions required by using the screws 11 becomes unnecessary. Further, as in the conventional watt-hour meter 1A shown in FIG. 1, in an unstable state where the current detector 7 is inserted into the wirings 3 and 5, the terminals 8b and 9a of the wirings 3 and 5 and the switches 8 and 9 The current detector 28 can be easily incorporated into the base 29 in the same process as the assembly of the contact opening / closing mechanism without the difficult task of connecting the screws 11 with the screws 11. As a result, the switch 22 of the present embodiment has improved connection reliability and reduced assembly man-hours.

また、完結した組立品となっている開閉器8,9、12を電力量計1A、1B内に組み込むのではなく、必須となる配線23〜26をそのまま開閉器22内の内部導体にして上記のように接点開閉機構を独自に構成するので、電力量計21に内蔵する開閉器22を小型化することができる。また、従来のように、完結した組立品となっている開閉器8,9、12を小型にすることで内部導体の断面積が減少したり、ばね性を確保するために内部導体にリン青銅などのばね性銅合金を利用することで、開閉器8,9、12が電力量計1A、1B内部で高温源となることはない。しかも、ねじ接続部が上記のように無いので、ねじによる配線締結部が、電力量計21内部で高温源となることもない。したがって、本実施形態の開閉器22は、配線23〜26の通電電流容量を適度な電流容量に設定し、全体的に熱容量バランスのとれた放熱特性を確保することが出来る。   Further, the switches 8, 9, and 12 that are complete assemblies are not incorporated in the watt hour meters 1A and 1B, but the essential wirings 23 to 26 are used as the internal conductors in the switch 22 as described above. Since the contact opening / closing mechanism is uniquely configured as described above, the switch 22 incorporated in the watt-hour meter 21 can be downsized. Further, as in the prior art, by reducing the size of the switches 8, 9, and 12 which are complete assemblies, the cross-sectional area of the internal conductor is reduced, and phosphor bronze is used for the internal conductor in order to ensure springiness. By using a spring copper alloy such as, the switches 8, 9, and 12 do not become a high temperature source inside the watt hour meters 1A and 1B. And since there is no screw connection part as mentioned above, the wiring fastening part by a screw | thread does not become a high temperature source inside the watt-hour meter 21. FIG. Therefore, the switch 22 of this embodiment can set the current carrying capacity of the wirings 23 to 26 to an appropriate current capacity, and can ensure heat radiation characteristics with a good balance of heat capacity.

また、本実施形態による電力量計21の開閉器22によれば、各配線23〜26は、ベース29の面方向における動きが、ベース29に設けられた溝29b,29b、29f,29fおよびピン29c,29cによって図5に太線で示すように拘束され、面方向に垂直な方向における動きが、ベース29を覆うカバー32およびベース29に設けられた爪29e,29eにより拘束される。このため、各配線23〜26のベース29への固定は、特別な固定部材を使用すること無く、ベース29とこれを覆うカバー32とで、行うことができる。また、ベース29に設けられた溝29b,29b、29f,29fおよびピン29c,29cにより、ベース29の面方向における動きが拘束されることで、開閉器22から突出する配線23〜26と電力量計21に接続される外部電線とのねじ締結時に生じるトルクによって、配線23〜26の位置が変位するのが抑制される。   Further, according to the switch 22 of the watt-hour meter 21 according to the present embodiment, the wires 23 to 26 are moved in the surface direction of the base 29 by grooves 29b, 29b, 29f, 29f and pins provided in the base 29. The movement in the direction perpendicular to the surface direction is restricted by the cover 32 covering the base 29 and the claws 29e and 29e provided on the base 29. For this reason, the wirings 23 to 26 can be fixed to the base 29 by the base 29 and the cover 32 covering the base 29 without using a special fixing member. Further, the movement in the surface direction of the base 29 is restricted by the grooves 29b, 29b, 29f, 29f and the pins 29c, 29c provided in the base 29, so that the wires 23 to 26 protruding from the switch 22 and the electric energy Displacement of the positions of the wirings 23 to 26 is suppressed by torque generated at the time of screw fastening with the external electric wires connected to the total 21.

また、本実施形態による電力量計21の開閉器22では、カバー32が、固定接点33,33および可動接点36,36の周囲のベース29部分のみを覆うので、カバー32の大きさが抑制され、カバー32の材料費が低減される。また、固定接点33,33および可動接点36,36間の開閉に伴って生じる塵の移動をカバー32で覆われた部分内に止め、機器内に拡散するのを防止することができる。また、カバー32で覆われない開放空間を大きく確保できるので、機器内の温度上昇を抑制することができる。   Further, in the switch 22 of the watt-hour meter 21 according to the present embodiment, the cover 32 covers only the base 29 portion around the fixed contacts 33 and 33 and the movable contacts 36 and 36, so that the size of the cover 32 is suppressed. The material cost of the cover 32 is reduced. In addition, the movement of dust caused by opening and closing between the fixed contacts 33, 33 and the movable contacts 36, 36 can be stopped in the portion covered with the cover 32, and can be prevented from diffusing into the device. Moreover, since the open space which is not covered with the cover 32 can be ensured largely, the temperature rise in an apparatus can be suppressed.

また、本実施形態による電力量計21の開閉器22では、各配線23〜26は、お互いに交差すること無くベース29に取り付けられる。このため、従来の電力量計1A、1Bのように、配線3〜5、16,17が立体交差するために配線5、16に隠れた異物や異常の目視がし難くなるという問題は、生じなくなる。   Moreover, in the switch 22 of the watt-hour meter 21 according to the present embodiment, the wires 23 to 26 are attached to the base 29 without crossing each other. For this reason, like the conventional watt-hour meters 1A and 1B, the wirings 3 to 5, 16, and 17 are three-dimensionally crossed, so that there is a problem that it is difficult to visually observe foreign matters and abnormalities hidden in the wirings 5 and 16. Disappear.

また、本実施形態による電力量計21の開閉器22によれば、配線23〜27はベース29の裏面側に、駆動部材31はベース29の表面側に設けられるので、配線23〜27と駆動部材31との間に電気絶縁距離をとって絶縁強度を確保することができる。また、配線23〜27と駆動部材31との間には磁気的距離もとられ、配線23〜26を流れる電流によって生成される電磁界の影響が、電磁的に駆動される駆動部材31に及び難くなる。また、この電磁界の影響が大きい場合には、駆動部材31のベース29への取付面などに電磁シールド板を設けることで、この電磁界の影響を低減することができる。また、開閉器22の外部から電磁界の影響を受ける場合には、駆動部材31を覆う側の面に電磁シールド板を設けることで、外部からの電磁界の影響を低減することができる。また、これら電磁シールド板のベース29への取り付けは、駆動部材31が設けられるベース29の表面側に配線23〜27が無いので、容易に行うことができる。   Further, according to the switch 22 of the watt-hour meter 21 according to the present embodiment, the wirings 23 to 27 are provided on the back surface side of the base 29 and the driving member 31 is provided on the front surface side of the base 29. The insulation strength can be secured by taking an electrical insulation distance between the member 31 and the member 31. In addition, a magnetic distance is provided between the wirings 23 to 27 and the driving member 31, and the influence of the electromagnetic field generated by the current flowing through the wirings 23 to 26 affects the electromagnetically driven driving member 31. It becomes difficult. Further, when the influence of the electromagnetic field is large, the influence of the electromagnetic field can be reduced by providing an electromagnetic shield plate on the mounting surface of the drive member 31 to the base 29 or the like. Moreover, when receiving the influence of the electromagnetic field from the outside of the switch 22, the influence of the electromagnetic field from the outside can be reduced by providing an electromagnetic shield plate on the surface that covers the drive member 31. The electromagnetic shield plate can be easily attached to the base 29 because the wirings 23 to 27 are not provided on the surface side of the base 29 on which the driving member 31 is provided.

なお、上記の実施形態による電力量計21の開閉器22では、図4および図6に示すように、金属板を曲げ加工して形成した可動板34,34を、電源側配線23,24の端部に可撓電線35,35で可動自在に接続した。そして、可動板34,34に可動接点36,36を設け、円筒コイルばね37,37によって可動接点36,36および固定接点33,33間の接点圧を生じさせた。   In the switch 22 of the watt-hour meter 21 according to the above embodiment, as shown in FIGS. 4 and 6, the movable plates 34, 34 formed by bending a metal plate are connected to the power supply side wirings 23, 24. The ends were movably connected by flexible electric wires 35 and 35. Then, movable contacts 36, 36 were provided on the movable plates 34, 34, and contact pressure between the movable contacts 36, 36 and the fixed contacts 33, 33 was generated by the cylindrical coil springs 37, 37.

しかし、図9(a)の斜視図、同図(b)の一部平面図に示すように、弾性を有する板ばねから可動板34A,34Aを形成し、電源側配線23,24の端部にこの可動板34A,34Aの端部を直接溶接して、電源側配線23,24の端部に可動板34A,34Aを可動自在に接続するように構成してもよい。なお、図9において図4および図6と同一部分には同一符号を付してその説明は省略する。   However, as shown in the perspective view of FIG. 9A and the partial plan view of FIG. 9B, the movable plates 34A and 34A are formed from elastic leaf springs, and the end portions of the power supply side wirings 23 and 24 are formed. Alternatively, the end portions of the movable plates 34A, 34A may be directly welded so that the movable plates 34A, 34A are movably connected to the end portions of the power supply side wirings 23, 24. 9, the same parts as those in FIGS. 4 and 6 are denoted by the same reference numerals, and the description thereof is omitted.

この場合にも、可動板34A,34Aに可動接点36,36を設けるが、可動板34A,34A自体が弾性を有するため、円筒コイルばね37,37を用いることなく、可動板34A,34Aに設けられた可動接点36,36が固定接点33,33に押し付けられ、可動接点36,36および固定接点33,33間に接点圧が生じさせられる。また、可動板34A,34Aの先端は、連結部材30の切り欠き部30a,30aに嵌合させられ、連結部材30の動きに連動して可動接点36,36を開閉する。   In this case as well, the movable contacts 36 and 36 are provided on the movable plates 34A and 34A. However, since the movable plates 34A and 34A themselves have elasticity, they are provided on the movable plates 34A and 34A without using the cylindrical coil springs 37 and 37. The movable contacts 36 and 36 thus pressed are pressed against the fixed contacts 33 and 33, and a contact pressure is generated between the movable contacts 36 and 36 and the fixed contacts 33 and 33. The tips of the movable plates 34 </ b> A and 34 </ b> A are fitted into the notches 30 a and 30 a of the connecting member 30, and open and close the movable contacts 36 and 36 in conjunction with the movement of the connecting member 30.

板ばねから形成される可動板34A,34Aは、上記の実施形態における可動板34,34、可撓電線35,35および円筒コイルばね37の機能を有するので、開閉器22を安価に構成することができるが、板ばねの導電性は可動板34,34や可撓電線35,35より低い。このため、可動板34A,34Aは、開閉器22の電流容量が比較的小さい場合や、許容温度上昇値が高い場合に適している。また、可動板34A,34Aに円筒コイルばね37,37を併用することで接点圧をより高めたり、可動板34A,34Aに可撓電線を並列に接続して導電率を調整し、温度上昇を低減することも、考えられる。   Since the movable plates 34A and 34A formed of leaf springs have the functions of the movable plates 34 and 34, the flexible electric wires 35 and 35, and the cylindrical coil spring 37 in the above embodiment, the switch 22 is configured at low cost. However, the conductivity of the leaf spring is lower than that of the movable plates 34 and 34 and the flexible electric wires 35 and 35. Therefore, the movable plates 34A and 34A are suitable when the current capacity of the switch 22 is relatively small or when the allowable temperature increase value is high. Further, by using cylindrical coil springs 37, 37 together with the movable plates 34A, 34A, the contact pressure can be further increased, or a flexible wire is connected in parallel to the movable plates 34A, 34A to adjust the conductivity, thereby increasing the temperature. Reduction is also conceivable.

また、上記の実施形態による電力量計21の開閉器22では、配線23,24を電源側、配線25,26を負荷側として説明したが、その逆に、配線23,24を負荷側、配線25,26を電源側とすることもできる。この場合、単相3線の電圧線の電圧は、配線25,26から検出するようにする。   Further, in the switch 22 of the watt-hour meter 21 according to the above embodiment, the wirings 23 and 24 are described as the power supply side and the wirings 25 and 26 are the load side, but conversely, the wirings 23 and 24 are the load side and wiring. 25 and 26 may be the power supply side. In this case, the voltage of the single-phase three-wire voltage line is detected from the wirings 25 and 26.

また、上記の実施形態による電力量計21の開閉器22では、一方の負荷側の配線25,26の端部に固定接点33,33が設けられ、他方の電源側の配線23,24の端部に可動自在に接続された可動板34,34に可動接点36,36が設けられる場合について、説明した。しかし、その逆に、電源側の配線23,24の端部に固定接点33,33が設けられ、負荷側の配線25,26の端部に可動自在に接続された可動板34,34に可動接点36,36が設けられるように、構成することもできる。   Further, in the switch 22 of the watt-hour meter 21 according to the above-described embodiment, the fixed contacts 33 and 33 are provided at the ends of the wirings 25 and 26 on one load side, and the ends of the wirings 23 and 24 on the other power source side. The case where the movable contacts 36, 36 are provided on the movable plates 34, 34 movably connected to the sections has been described. However, conversely, fixed contacts 33, 33 are provided at the ends of the power supply side wirings 23, 24, and are movable to movable plates 34, 34 that are movably connected to the ends of the load side wirings 25, 26. It can also be configured such that the contacts 36 are provided.

また、上記の実施形態による電力量計21の開閉器22では、図5に示すように、負荷側配線25,26は、ベース29に設けられた溝29b,29bおよびピン29c,29cに嵌合することで、ベース29の面方向における少なくとも2方向の動きが拘束される場合について、説明した。しかし、負荷側配線25,26は、ベース29に設けられた溝29b,29bに嵌合するだけか、または、ベース29に設けられたピン29c,29cに嵌合するだけで、ベース29の面方向における少なくとも2方向の動きが拘束されるようにしてもよい。また、負荷側配線25,26の各両側部に突出してベース29に設けられた図示しない突起に、負荷側配線25,26の少なくとも2方向に延びる2箇所で負荷側配線25,26の各両側部が挟まれることで、ベース29の面方向における少なくとも2方向の動きが拘束されるようにしてもよい。また、負荷側配線25,26の各両側部に突出してベース29に設けられた図示しない突起に、負荷側配線25,26の切り欠かれた各両側部が嵌合して挟まれることで、ベース29の面方向における少なくとも2方向の動きが拘束されるようにしてもよい。   Further, in the switch 22 of the watt hour meter 21 according to the above embodiment, as shown in FIG. 5, the load-side wirings 25 and 26 are fitted into grooves 29b and 29b and pins 29c and 29c provided in the base 29. Thus, the case where movement in at least two directions in the surface direction of the base 29 is restrained has been described. However, the load-side wirings 25 and 26 are only fitted into the grooves 29b and 29b provided in the base 29, or are simply fitted into the pins 29c and 29c provided in the base 29, so that the surface of the base 29 is obtained. The movement in at least two directions in the direction may be restricted. Further, each side of each of the load-side wirings 25, 26 protrudes from each side of the load-side wirings 25, 26 to a projection (not shown) provided on the base 29 and extends in at least two directions of the load-side wirings 25, 26. The movement of at least two directions in the surface direction of the base 29 may be restricted by sandwiching the portion. Further, by projecting on both side portions of the load side wirings 25, 26 and projecting on both sides of the load side wirings 25, 26 to the projections (not shown) provided on the base 29, The movement in at least two directions in the surface direction of the base 29 may be restricted.

また、負荷側配線25,26は、直線状部分の両縁上部が爪29e,29eで挟まれると共に、ベース29にカバー32が被されることで、ベース29底面の面方向に垂直な方向における動きが拘束される場合について、説明した。しかし、負荷側配線25,26は、直線状部分の両縁上部が爪29e,29eで挟まれるだけで、または、ベース29にカバー32が被されるだけで、ベース29底面の面方向に垂直な方向おける動きが拘束されるようにしてもよい。   In addition, the load side wirings 25 and 26 are sandwiched between claws 29e and 29e at both upper edges of the linear portion, and the cover 32 is covered with the base 29, so that the load side wirings 25 and 26 are perpendicular to the surface direction of the bottom surface of the base 29. The case where the movement is restrained has been described. However, the load side wirings 25 and 26 are perpendicular to the surface direction of the bottom surface of the base 29 only by the upper edges of the straight portions being sandwiched between the claws 29e and 29e or simply by covering the base 29 with the cover 32. The movement in any direction may be restricted.

また、電源側配線23,24は、ベース29に設けられた溝29f,29fに嵌合することで、ベース29の面方向における少なくとも2方向の動きが拘束される場合について、説明した。しかし、ベース29に設けられたピン29c,29cと同様なピンに嵌合することで、または、電源側配線23,24の各両側部に突出してベース29に設けられた図示しない突起に、電源側配線23,24の各両側部が負荷側配線25,26と同様に挟まれることで、ベース29の面方向における少なくとも2方向の動きが拘束されるようにしてもよい。また、電源側配線23,24は、ベース29にカバー32が被されることで、ベース29底面の面方向に垂直な方向おける動きが拘束される場合について、説明した。しかし、特定部分の両縁上部が爪29e,29eと同様な爪で挟まれることで、ベース29底面の面方向に垂直な方向における動きが拘束されるようにしてもよい。   Further, the case where the power supply side wirings 23 and 24 are engaged with the grooves 29f and 29f provided in the base 29 to restrict movement in at least two directions in the surface direction of the base 29 has been described. However, it is possible to fit the same pins as the pins 29c and 29c provided on the base 29, or to the projections (not shown) provided on the base 29 so as to protrude from both sides of the power supply side wirings 23 and 24. The movements in at least two directions in the surface direction of the base 29 may be restrained by sandwiching both side portions of the side wirings 23 and 24 in the same manner as the load side wirings 25 and 26. Further, the power supply side wirings 23, 24 have been described with respect to the case where the movement in the direction perpendicular to the surface direction of the bottom surface of the base 29 is restricted by the cover 32 being covered with the base 29. However, the movement in the direction perpendicular to the surface direction of the bottom surface of the base 29 may be constrained by sandwiching the upper portions of both edges of the specific portion with the claws similar to the claws 29e and 29e.

また、上記の実施形態で、1個の電流検出器28に換えて大形な2個の電流検出器28A,28Bを使う場合には、図10(a)に示すように、これら相互をずらして配線25,26に挿通させることで、開閉器22Aを構成することもできる。なお、図10において図3と同一または相当する部分には同一符号を付してその説明は省略する。この構成の開閉器22Aにおいても上記の実施形態と同様な作用効果が奏される。   Further, in the above embodiment, when two large current detectors 28A and 28B are used instead of one current detector 28, they are shifted from each other as shown in FIG. Thus, the switch 22A can be configured by being inserted through the wirings 25 and 26. 10, parts that are the same as or correspond to those in FIG. 3 are given the same reference numerals, and descriptions thereof are omitted. In the switch 22A having this configuration, the same effects as those of the above-described embodiment are exhibited.

上記の実施形態では、電力量計21の開閉器22が単相3線式で2極開閉の例を示した。しかし、図10(b)に示すように、三相3線式で3極開閉の電力量計21Aの開閉器22Bを、上記の実施形態と同様に構成することができる。この場合、開閉器22Bは、電源側配線51,52,53および負荷側配線54,55,56間を3極で開閉する。この開閉器22Bの構成においても上記の実施形態と同様な作用効果が奏される。また、単相2線式の電力量計の開閉器にも本発明を同様に適用することができ、この場合においても上記の実施形態と同様な作用効果が奏される。   In said embodiment, the switch 22 of the watt-hour meter 21 showed the example of 2 pole opening / closing by the single phase 3 wire type. However, as shown in FIG. 10B, the switch 22B of the watt-hour meter 21A having a three-phase three-wire system and three-pole switching can be configured in the same manner as in the above embodiment. In this case, the switch 22B opens and closes the power supply side wirings 51, 52, 53 and the load side wirings 54, 55, 56 with three poles. In the configuration of the switch 22B, the same function and effect as those of the above embodiment can be obtained. In addition, the present invention can be similarly applied to a switch of a single-phase two-wire watt-hour meter. In this case as well, the same operational effects as the above-described embodiment can be obtained.

21,21A…電子式電力量計
21a…端子部
21b,21c,21d…筒状ガイド穴
22,22A,22B…開閉器
23,24,51〜53…電源側配線(非計測側配線)
23a,24a…リード線接続部
25,26,54〜56…負荷側配線(計測側配線)
27…負荷側配線(中性線電圧検出用)
28,28A,28B…電流検出器
29…ベース
29a,29b,29f,29h…溝
29c…ピン
29d…腕
29e,29i…爪
29g…軸受け
30…連結部材
30a…切り欠き部
30b…端部
31…駆動部材
32…カバー
33…固定接点
34,34A…可動板
34a…先端部
34b…軸
35…可撓電線
36…可動接点
37…円筒コイルばね
38…鉄心
38a…先端部
41…磁気コア
42…ケース
42a…筒状部
21, 21 A ... Electronic watt-hour meter 21 a ... Terminal portions 21 b, 21 c, 21 d ... Cylindrical guide holes 22, 22 A, 22 B ... Switches 23, 24, 51-53 ... Power supply side wiring (non-measurement side wiring)
23a, 24a ... Lead wire connection part 25, 26, 54-56 ... Load side wiring (measurement side wiring)
27 ... Load side wiring (for neutral line voltage detection)
28, 28A, 28B ... current detector 29 ... base 29a, 29b, 29f, 29h ... groove 29c ... pin 29d ... arm 29e, 29i ... claw 29g ... bearing 30 ... coupling member 30a ... notch 30b ... end 31 ... Drive member 32 ... Cover 33 ... Fixed contact 34, 34A ... Movable plate 34a ... Tip 34b ... Shaft 35 ... Flexible electric wire 36 ... Movable contact 37 ... Cylindrical coil spring 38 ... Iron core 38a ... Tip 41 ... Magnetic core 42 ... Case 42a ... cylindrical portion

Claims (5)

電力量計の端子部に所定間隔で平行に配列される電源側の配線と負荷側の配線との間の接続を断続する電力量計の開閉器において、
前記電源側または前記負荷側の通電電流が計測される計測側の前記配線は、基体に取り付けられてこの基体から突出する直線状部分に電流検出器が挿入され、
通電電流が計測されない非計測側の前記配線は、計測側の前記配線の前記直線状部分から離れる方向に曲げられることで、前記直線状部分に挿入される前記電流検出器との間に距離がとられて前記基体に取り付けられ、
前記電源側または前記負荷側の一方の側の前記配線の端部に固定接点が設けられ、他方の側の前記配線の端部に可動自在に接続された可動板に、前記固定接点に当接される可動接点が設けられ、
前記基体の面に平行な方向に移動自在に前記基体に取り付けられて前記可動板を連結する連結部材と、
前記基体の面に平行な方向に前記連結部材を駆動して、前記可動接点の前記固定接点に対する相対位置を可変させる駆動部材と
を備えることを特徴とする電力量計の開閉器。
In the switch of the watt hour meter that intermittently connects the wiring on the power source side and the wiring on the load side arranged in parallel at a predetermined interval to the terminal part of the watt hour meter,
The wiring on the measurement side where the energization current on the power supply side or the load side is measured is attached to the base body, and a current detector is inserted into a linear portion protruding from the base body,
The wiring on the non-measurement side where the energization current is not measured is bent in a direction away from the linear portion of the wiring on the measurement side, so that the distance from the current detector inserted in the linear portion is increased. Taken and attached to the substrate,
A fixed contact is provided at the end of the wiring on one side of the power supply side or the load side, and a movable plate that is movably connected to the end of the wiring on the other side contacts the fixed contact Movable contact is provided,
A connecting member that is attached to the base so as to be movable in a direction parallel to the surface of the base and connects the movable plate;
And a drive member that drives the connecting member in a direction parallel to the surface of the base to change a relative position of the movable contact with respect to the fixed contact.
前記電源側および前記負荷側の各前記配線は、前記基体に設けられた溝もしくはピンに嵌合することで、または前記基体に設けられた突起に挟まれることで、前記基体の面方向における少なくとも2方向の動きが拘束され、前記基体を覆うカバーが被されることで、または前記基体に設けられた爪に挟まれることで、前記面方向に垂直な方向における動きが拘束されることを特徴とする請求項1に記載の電力量計の開閉器。   Each of the wirings on the power supply side and the load side is fitted into a groove or a pin provided on the base, or is sandwiched between protrusions provided on the base, so that at least in the surface direction of the base The movement in two directions is restricted, and the movement in the direction perpendicular to the surface direction is restricted by being covered with a cover that covers the base or being sandwiched between claws provided on the base. The watt-hour switch according to claim 1. 前記固定接点および前記可動接点の周囲の前記基体部分のみを覆うカバーを備えることを特徴とする請求項1または請求項2に記載の電力量計の開閉器。   The switch for a watt-hour meter according to claim 1 or 2, further comprising a cover that covers only the base portion around the fixed contact and the movable contact. 前記電源側および前記負荷側の各前記配線は、お互いに交差すること無く前記基体に取り付けられることを特徴とする請求項1から請求項3のいずれか1項に記載の電力量計の開閉器。   The watt-hour switch according to any one of claims 1 to 3, wherein the wirings on the power supply side and the load side are attached to the base body without crossing each other. . 前記連結部材は、一部が前記基体の反対面側に突出し、
前記駆動部材は、前記基体の反対面側に設けられて前記連結部材の前記一部と連結される
ことを特徴とする請求項1から請求項4のいずれか1項に記載の電力量計の開閉器。
A part of the connecting member protrudes on the opposite side of the base body,
The said drive member is provided in the other surface side of the said base | substrate, and is connected with the said part of the said connection member. The watt-hour meter of any one of Claims 1-4 characterized by the above-mentioned. Switch.
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* Cited by examiner, † Cited by third party
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US10752997B2 (en) 2006-10-19 2020-08-25 P&S Global Holdings Llc Methods and apparatus for making coatings using ultrasonic spray deposition

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