JP4564643B2

JP4564643B2 - Single-phase three-wire distribution board voltage switching device

Info

Publication number: JP4564643B2
Application number: JP2000339799A
Authority: JP
Inventors: 党正羽生; 邦明品田; 良吉川; 幸造宮崎
Original assignee: Tempearl Industrial Co Ltd
Current assignee: Tempearl Industrial Co Ltd
Priority date: 2000-11-08
Filing date: 2000-11-08
Publication date: 2010-10-20
Anticipated expiration: 2020-11-08
Also published as: JP2002152919A

Description

【０００１】
【発明の属する技術分野】
この発明は単相３線式分電盤に関し，特に，その分岐ブレーカの電圧切替装置に関するものである。
【０００２】
【従来の技術】
分岐ブレーカの電圧切替装置としては，従来，図１に示すようなものがあった。図１において，１１は第一の電圧相の導体，１２は中性相の導体，１３は第二の電圧相の導体である。１４，１５は分岐ブレーカ，１６，２０は送り板，１７はねじ，１８は筒状導体子，１９は雌ねじ部材である。１１０１は第一の電圧相の導体１１から延出する接続部で，分岐ブレーカ１４の端子１４０２に接続される。なお，図の分岐ブレーカの端子は，導体を弾性による挟み込みで接続するプラグイン状のものとして設定している。１６の送り板は，接続部１６０１と長孔１６０２を有し，接続部１６０１は分岐ブレーカ１４の端子１４０１に接続される。１２０２と１３０３は中性相導体と第二の電圧相導体のＵ字状切欠部で，それぞれに１２０１と１３０２のように筒状導体接続面部を含み，送り板１６の長孔１６０２の端と端にそれぞれＵ字切欠部のＵ字の開口が内向きとなるよう配置されている。ねじ１７と雌ねじ部材１９は，送り板１６とＵ字状切欠部１２０２または１３０３の間に筒状導体子１８を選択して圧接状に締めつける。１２０２を選択した場合は，分岐ブレーカ１４には，第一の電圧相の導体１１と中性相の導体１２から電圧が供給されて１００Ｖとなる。また１３０３を選択した場合は第一の電圧相の導体１１と第二の電圧相の導体１３から電圧が供給されて２００Ｖとなる。１５の分岐ブレーカについても接続部１３０１と２００１から電圧が供給され，電圧の切替えは１４のブレーカの場合と同様である。
【０００３】
図２は，その様子を断面で表した図で，図１の分岐ブレーカ１５に接続される送り板２０について示している。図２において２１は，絶縁部材で，図１では図示されていなかったが，図１の送り板や筒状導体子やその他の構成部材の支持や，異極間の絶縁を確保している。図１において，ブレーカ１５は，送り板２０の接続部２００１と第二の電圧相導体１３の接続部１３０１に接続されて電圧を供給される。図２は，送り板２０が筒状導体子１８により中性相導体１２のＵ字状切欠部１２０４に接続されている状態を表している。
【０００４】
【発明が解決しようとする課題】
上記のような従来の単相３線式分電盤の電圧切替装置は，電圧切替えに当たって，ねじ１７を緩めて筒状導体子１８と雌ねじ部材１９ごと長孔内を端から端まで移動させ，ねじを再び締めつけるのみで簡単に電圧を切替えることができるものである。
【０００５】
しかしながら，分電盤は通常，垂直な壁面に対し，図１のブレーカの底面を平行に送り板１６，２０の長孔が垂直になるように取り付けるから，ねじ１７を緩めて長孔の上方に移動させた際にドライバの先端をねじから離すと，ねじと筒状導体子と雌ねじ部材が簡単に長孔の下方に落ちてしまうという問題があった。また，送り板の長孔内をねじが自在に移動できるため，ねじを締める際の位置決めが明確でなく，Ｕ字切欠部に中途半端に筒状導体子と雌ねじ部材が接触した状態でねじを締めてしまうことができて，ねじ締めによる接触が不完全となる可能性があった。
【０００６】
本発明は，図１に示すような従来例の電圧切替装置において，分電盤を壁面に取り付けた状態で，ねじを長孔の上方に移動させドライバの先端をねじから離した際に，ねじと筒状導体子と雌ねじ部材が簡単に長孔の下方に落ちることがなく，ねじを締める際の位置決めが明確で，Ｕ字切欠部に中途半端に筒状導体子と雌ねじ部材が接触することがなく，ねじ締めによる接触が完全とできるような電圧切替装置を提供することを目的としている。
【０００７】
【課題を解決するための手段】
そこで本件の発明は，主幹ブレーカと，複数の２極分岐ブレーカと，該主幹ブレーカと複数の２極分岐ブレーカを電気的に接続する導体装置を含む単相３線式分電盤の，分岐ブレーカの片方の極に接続する導体相を中性相と電圧相に切替えて分岐ブレーカへの供給電圧を切替える電圧切替装置において，該電圧切替装置は，前記分岐ブレーカの片方の極の端子に接続され長孔を有する送り板と，中性相と第一及び第二の電圧相の導体と，筒状導体子と，前記送り板に形成された長孔と筒状導体子を貫通し，筒状導体子を中性相もしくは電圧相の導体の接続部に選択的に接続するねじと，該ねじが接続される雌ねじ部材を含んでなるものであり，前記電圧切替部の中性相と電圧相の導体の筒状導体子への接続部は前記筒状導体子接続面部を含むＵ字状切欠部であり，
前記長孔の端と端にそれぞれＵ字状切欠部のＵ字の開口が内向きとなるよう配置され，
前記ねじと雌ねじ部材は送り板の長孔の端部にて該送り板と夫々のＵ字状切欠部の間に筒状導体子を圧接状に締めつける一方，
ねじを緩めた状態では送り板の長孔内を筒状導体子及び雌ねじとともに移動され，
送り板長孔の中央部には，
前記Ｕ字状切欠部を切替える際にねじを緩めた状態で乗り越えが可能となるとともに，
分電盤を壁面に取り付けた状態ではねじ及び雌ねじ部材の脱落を防止する凸部を形成し,
該凸部を乗り越えた位置が締めつけ位置となる位置規制部を形成したことを特徴とする単相３線式分電盤の電圧切替装置を提供したものである。それにより，長孔内のねじの移動は，長孔中央部の障害部を乗り越えておこなうことになるから，簡単にはねじが移動することがなくなり，ねじからドライバーの先端を離しても，ねじはその位置で保持される。また，ねじは障害部によって，長孔内の端に位置規制された状態で締め付けることができるから，接触が不完全になることがない。
【０００８】
【発明の実施の形態】
この発明の第１の実施例について図面を用いて以下に説明する。図３と図４は，本件発明，第一実施例の電圧切替装置の説明図である。
【０００９】
図において，１６０３と２００３は，送り板１６と２０の長孔１６０２と２００２の略中央部に形成された凸部である。１６０３と２００３以外の符号で示す部分は図１と図２に示す符号と同一であるので，説明を省略する。図４において，ねじ１７をゆるめて，筒状導体子１８の接続をＵ字状切欠部１１０２側に切替える際は，凸部２００３を乗り越える必要があるが，適度にねじを緩めれば可能である。一旦ねじ１７が凸部２００３を乗り越えた後は図４の第一の電圧相導体１１が上方になるように図の底面が垂直な状態となっても，凸部２００３にねじ１７の移動が阻止されて，容易に落ちることがない。また，凸部２００３によりねじ１７は，長孔２００２のどちらか一方の端に位置規制されるため，Ｕ字状切欠部の奥一杯までねじが入り込み，筒状導体子１８とＵ字状切欠部の接触が確実な状態でねじを締めることができる。
【００１０】
図５と図６は，本件発明の第二の実施例で，図３と図４の凸部１６０３と２００３を逆さにした凸部１６０４と２００４に置き換えたものであり，それによる作用効果は図３と図４に示す第一の例と同一である。
【００１１】
【効果】
以上のように本発明によれば，図１に示すような従来例の電圧切替装置において，ねじを長孔の上方に移動させドライバの先端をねじから離した際に，ねじと筒状導体子と雌ねじ部材が簡単に長孔の下方に落ちることがなく，ねじを締める際の位置決めが明確で，Ｕ字切欠部に中途半端に筒状導体子と雌ねじ部材が接触することがなく，ねじ締めによる接触を完全とできる電圧切替装置を提供することができる。
【図面の簡単な説明】
【図１】従来の分岐ブレーカの電圧切替装置の図。
【図２】従来の分岐ブレーカの電圧切替装置の断面図。
【図３】本件発明第一の実施例による電圧切替装置の図。
【図４】本件発明第一の実施例による電圧切替装置の断面図。
【図５】本件発明第ニの実施例による電圧切替装置の図。
【図６】本件発明第ニの実施例による電圧切替装置の断面図。
【符号の説明】
１１第一の電圧相の導体
１２中性相の導体
１３第二の電圧相の導体
１６，２０送り板
１６０２，２００２長孔
１６０３，２００３凸部
１６０４，２００４凸部
１７ねじ
１８筒状導体子
１９雌ねじ部材
２１絶縁部材[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a single-phase three-wire distribution board, and more particularly to a voltage switching device for the branch breaker.
[0002]
[Prior art]
Conventionally, there has been a voltage switching device for a branch breaker as shown in FIG. In FIG. 1, 11 is a first voltage phase conductor, 12 is a neutral phase conductor, and 13 is a second voltage phase conductor. 14 and 15 are branch breakers, 16 and 20 are feed plates, 17 is a screw, 18 is a cylindrical conductor, and 19 is a female screw member. Reference numeral 1101 denotes a connection portion extending from the first voltage phase conductor 11 and connected to the terminal 1402 of the branch breaker 14. Note that the terminals of the branch breaker in the figure are set as plug-ins that connect the conductors by elastic pinching. The sixteen feed plates have a connection portion 1601 and a long hole 1602, and the connection portion 1601 is connected to the terminal 1401 of the branch breaker 14. Reference numerals 1202 and 1303 denote U-shaped notches of the neutral phase conductor and the second voltage phase conductor, respectively including cylindrical conductor connecting surface portions like 1201 and 1302, and the ends of the long holes 1602 of the feed plate 16. The U-shaped opening of each U-shaped notch is arranged so as to face inward. The screw 17 and the female screw member 19 select the cylindrical conductor 18 between the feed plate 16 and the U-shaped notch 1202 or 1303 and fasten it in a pressure contact manner. When 1202 is selected, a voltage is supplied to the branch breaker 14 from the first voltage phase conductor 11 and the neutral phase conductor 12 to 100V. When 1303 is selected, a voltage is supplied from the first voltage phase conductor 11 and the second voltage phase conductor 13 to 200V. The 15 branch breakers are also supplied with voltages from the connection portions 1301 and 2001, and the voltage switching is the same as in the case of the 14 breakers.
[0003]
FIG. 2 is a diagram showing the state in section, and shows the feed plate 20 connected to the branch breaker 15 of FIG. In FIG. 2, reference numeral 21 denotes an insulating member, which is not shown in FIG. 1, but ensures the support of the feed plate, the cylindrical conductor, and other constituent members of FIG. In FIG. 1, the breaker 15 is connected to a connection part 2001 of the feed plate 20 and a connection part 1301 of the second voltage phase conductor 13 and supplied with a voltage. FIG. 2 shows a state in which the feed plate 20 is connected to the U-shaped notch 1204 of the neutral phase conductor 12 by the cylindrical conductor 18.
[0004]
[Problems to be solved by the invention]
In the voltage switching device of the conventional single-phase three-wire distribution board as described above, when the voltage is switched, the screw 17 is loosened and the cylindrical conductor 18 and the female screw member 19 are moved from one end to the other in the long hole. The voltage can be easily switched by simply tightening the screw again.
[0005]
However, since the distribution board is usually mounted so that the bottom of the breaker of FIG. If the tip of the driver is moved away from the screw when moved, the screw, the cylindrical conductor, and the female screw member easily fall below the long hole. In addition, since the screw can move freely in the long hole of the feed plate, the positioning when tightening the screw is not clear, and the screw is placed with the cylindrical conductor and the female screw member in contact with the U-shaped notch at the halfway end. There was a possibility that the contact by screw tightening could be incomplete.
[0006]
In the voltage switching device of the conventional example as shown in FIG. 1, the screw is moved when the screw is moved above the slot and the tip of the driver is separated from the screw with the distribution board attached to the wall. The cylindrical conductor and female screw member do not easily fall below the long hole, the positioning when tightening the screw is clear, and the cylindrical conductor and female screw member are in contact with the U-shaped notch halfway The object is to provide a voltage switching device that can be completely contacted by screw tightening.
[0007]
[Means for Solving the Problems]
Accordingly, the present invention provides a branch breaker of a single-phase three-wire distribution board including a main breaker, a plurality of two-pole branch breakers, and a conductor device that electrically connects the main breaker to a plurality of two-pole branch breakers. In the voltage switching device for switching the supply voltage to the branch breaker by switching the conductor phase connected to one of the poles to the neutral phase and the voltage phase, the voltage switching device is connected to the terminal of the one pole of the branch breaker. A feed plate having a long hole, a neutral phase, first and second voltage phase conductors, a cylindrical conductor, and a long hole and a cylindrical conductor formed in the feed plate , a screw for selectively connecting the connecting portions of the conductors of the neutral phase or voltage phase Dotaiko, a female screw member to which the screw is connected and made of Nde containing, neutral phase voltage phase of the voltage switching unit The connecting portion of the conductor to the cylindrical conductor includes the cylindrical conductor connecting surface portion. A-shaped cut-out portion,
U-shaped openings of U-shaped cutouts are arranged inwardly at the ends of the long holes, respectively,
While the screw and the female screw member fasten the cylindrical conductor between the feed plate and each U-shaped notch at the end of the long hole of the feed plate,
When the screw is loosened, it is moved along with the cylindrical conductor and female screw in the long hole of the feed plate.
In the center of the feed plate slot,
When switching the U-shaped notch, it is possible to get over with the screw loosened,
When the distribution board is attached to the wall, a convex part is formed to prevent the screws and female screw members from falling off.
The present invention provides a voltage switching device for a single-phase three-wire distribution board characterized in that a position regulating portion is formed in which a position over the convex portion is a tightening position . As a result, the screw in the slot is moved over the obstacle in the center of the slot, so that the screw does not move easily. Is held in that position. Moreover, since the screw can be tightened in a state where the position is regulated by the obstacle in the end of the long hole, the contact does not become incomplete.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
A first embodiment of the present invention will be described below with reference to the drawings. 3 and 4 are explanatory diagrams of the voltage switching device according to the present invention and the first embodiment.
[0009]
In the figure, reference numerals 1603 and 2003 denote convex portions formed at substantially central portions of the long holes 1602 and 2002 of the feed plates 16 and 20. Portions indicated by reference numerals other than 1603 and 2003 are the same as those shown in FIGS. In FIG. 4, when the screw 17 is loosened and the connection of the cylindrical conductor 18 is switched to the U-shaped notch 1102 side, it is necessary to get over the convex part 2003, but it is possible if the screw is loosened moderately. . Once the screw 17 gets over the convex part 2003, even if the bottom face of the figure is vertical so that the first voltage phase conductor 11 of FIG. And does not fall easily. Further, since the position of the screw 17 is regulated at one end of the long hole 2002 by the convex portion 2003, the screw enters the U-shaped notch to the full depth, and the cylindrical conductor 18 and the U-shaped notched portion The screw can be tightened in a state in which the contact is reliable.
[0010]
FIGS. 5 and 6 show a second embodiment of the present invention in which the convex portions 1603 and 2003 in FIGS. 3 and 4 are replaced with the convex portions 1604 and 2004 which are inverted. 3 and the first example shown in FIG.
[0011]
【effect】
As described above, according to the present invention, in the conventional voltage switching device as shown in FIG. 1, when the screw is moved above the elongated hole and the tip of the driver is separated from the screw, the screw and the cylindrical conductor The female screw member does not easily fall below the long hole, the positioning when tightening the screw is clear, the cylindrical conductor and the female screw member do not contact the U-shaped notch partway, Therefore, it is possible to provide a voltage switching device that can complete the contact by.
[Brief description of the drawings]
FIG. 1 is a diagram of a voltage switching device of a conventional branch breaker.
FIG. 2 is a cross-sectional view of a conventional voltage switching device for a branch breaker.
FIG. 3 is a diagram of a voltage switching device according to a first embodiment of the present invention.
FIG. 4 is a cross-sectional view of a voltage switching device according to a first embodiment of the present invention.
FIG. 5 is a diagram of a voltage switching device according to a second embodiment of the present invention;
FIG. 6 is a cross-sectional view of a voltage switching device according to a second embodiment of the present invention.
[Explanation of symbols]
11 First Voltage Phase Conductor 12 Neutral Phase Conductor 13 Second Voltage Phase Conductor 16, 20 Feed Plate 1602, 2002 Long Hole 1603, 2003 Convex 1604, 2004 Convex 17 Screw 18 Cylindrical Conductor 19 Female thread member 21 Insulating member

Claims

主幹ブレーカと，複数の２極分岐ブレーカと，該主幹ブレーカと複数の２極分岐ブレーカを電気的に接続する導体装置を含む単相３線式分電盤の，分岐ブレーカの片方の極に接続する導体相を中性相と電圧相に切替えて分岐ブレーカへの供給電圧を切替える電圧切替装置において，
該電圧切替装置は，前記分岐ブレーカの片方の極の端子に接続され長孔を有する送り板と，中性相と第一及び第二の電圧相の導体と，筒状導体子と，前記送り板に形成された長孔と筒状導体子を貫通し，筒状導体子を中性相もしくは電圧相の導体の接続部に選択的に接続するねじと，該ねじが接続される雌ねじ部材を含んでなるものであり，
前記電圧切替部の中性相と電圧相の導体の筒状導体子への接続部は前記筒状導体子接続面部を含むＵ字状切欠部であり，
前記長孔の端と端にそれぞれＵ字状切欠部のＵ字の開口が内向きとなるよう配置され，
前記ねじと雌ねじ部材は送り板の長孔の端部にて該送り板と夫々のＵ字状切欠部の間に筒状導体子を圧接状に締めつける一方，
ねじを緩めた状態では送り板の長孔内を筒状導体子及び雌ねじとともに移動され，
送り板長孔の中央部には，
前記Ｕ字状切欠部を切替える際にねじを緩めた状態で乗り越えが可能となるとともに，
分電盤を壁面に取り付けた状態ではねじ及び雌ねじ部材の脱落を防止する凸部を形成し,
該凸部を乗り越えた位置が締めつけ位置となる位置規制部を形成したことを特徴とする単相３線式分電盤の電圧切替装置。Connected to one pole of a branch breaker of a single-phase three-wire distribution board including a main breaker, a plurality of two-pole branch breakers, and a conductor device that electrically connects the main breaker and a plurality of two-pole branch breakers In the voltage switching device that switches the supply phase voltage to the branch breaker by switching the conductor phase to neutral phase and voltage phase,
The voltage switching device includes a feed plate connected to one terminal of the branch breaker and having a long hole, a neutral phase, first and second voltage phase conductors, a cylindrical conductor, and the feed A screw that penetrates the long hole formed in the plate and the cylindrical conductor, selectively connects the cylindrical conductor to the connection portion of the neutral phase or voltage phase conductor , and a female screw member to which the screw is connected It is made of Nde including,
The connection portion of the neutral phase and voltage phase conductor of the voltage switching portion to the cylindrical conductor is a U-shaped notch including the cylindrical conductor connection surface portion,
U-shaped openings of U-shaped cutouts are arranged inwardly at the ends of the long holes, respectively,
While the screw and the female screw member fasten the cylindrical conductor between the feed plate and each U-shaped notch at the end of the long hole of the feed plate,
When the screw is loosened, it is moved along with the cylindrical conductor and female screw in the long hole of the feed plate.
In the center of the feed plate slot,
When switching the U-shaped notch, it is possible to get over with the screw loosened,
When the distribution board is attached to the wall, a convex part is formed to prevent the screws and female screw members from falling off.
A voltage switching device for a single-phase three-wire distribution board characterized in that a position regulating portion is formed in which a position over the convex portion is a tightening position .