JP7000215B2 - power outlet - Google Patents

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JP7000215B2
JP7000215B2 JP2018053114A JP2018053114A JP7000215B2 JP 7000215 B2 JP7000215 B2 JP 7000215B2 JP 2018053114 A JP2018053114 A JP 2018053114A JP 2018053114 A JP2018053114 A JP 2018053114A JP 7000215 B2 JP7000215 B2 JP 7000215B2
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plug
plug blade
blade insertion
intermediate position
insertion port
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JP2019164952A (en
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佳洋 神田
明義 加藤
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河村電器産業株式会社
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Description

本発明は、トラッキングによる火災の発生を防止する電源コンセントに関し、詳しくはトラッキングに至る前に発生する放電を検知してトラッキングの発生を防止する電源コンセントに関する。 The present invention relates to a power outlet that prevents the occurrence of a fire due to tracking, and more particularly to a power outlet that detects a discharge that occurs before the tracking and prevents the occurrence of tracking.

従来より、トラッキング発生前の微小な放電を検知して電路を遮断する電源コンセントがある。例えば、特許文献1では、コンセントのプラグ挿入口間に直径1.5mm程度の孔を4カ所設け、その孔の奥部となるコンセントケースの内部にセンサとしてのリード線を配置し、リード線とグランドとの間で電流が流れたらプラグ挿入口間で放電が発生と判断して電路を遮断操作した。 Conventionally, there is a power outlet that detects a minute discharge before tracking occurs and cuts off an electric circuit. For example, in Patent Document 1, four holes having a diameter of about 1.5 mm are provided between the plug insertion openings of an outlet, and a lead wire as a sensor is arranged inside an outlet case at the back of the holes, and the lead wire is used as a lead wire. When a current flowed between the ground and the plug, it was judged that a discharge had occurred between the plug insertion ports, and the electric circuit was cut off.

特許第4205478号公報Japanese Patent No. 4205478

上記特許文献1の技術により、プラグ挿入口の間に孔を設けて、その孔の内部に放電を検知させるリード線を配置することで、トラッキング放電に至る前の放電を検知することができた。
しかしながら、上記特許文献1の技術は、接地極のプラグ挿入口を持たない平行な栓刃のみ備えた単相100V用のコンセントに対応させた構成であったため、平行でない栓刃や接地極のプラグ挿入口を備えた3極構造のコンセントには対応できなかった。
According to the technique of Patent Document 1, by providing a hole between the plug insertion openings and arranging a lead wire for detecting the discharge inside the hole, it was possible to detect the discharge before the tracking discharge. ..
However, the technique of Patent Document 1 is configured to correspond to an outlet for single-phase 100V provided only with a parallel plug blade having no plug insertion port for the grounding electrode, so that the plug of the non-parallel plug blade or the grounding electrode is supported. It was not possible to handle a 3-pole structure outlet equipped with an insertion port.

そこで、本発明はこのような問題点に鑑み、接地極の有無に関わらず、また平行でない栓刃に対してもトラッキングに至る前の放電を検知できる電源コンセントを提供することを目的としている。 Therefore, in view of such a problem, it is an object of the present invention to provide a power outlet capable of detecting a discharge before reaching tracking even for a non-parallel plug blade regardless of the presence or absence of a grounding electrode.

上記課題を解決する為に、請求項1の発明は、一対の栓刃挿入口と接地極挿入口とがコンセントケースの前面に形成されて、接地極を有する接続プラグを接続可能な電源コンセントであって、栓刃挿入口は、一方がI字状の栓刃を挿入可能なI形状を成す一方、他方が、I字状に加えてL字状、更には一方のI字状の栓刃に直交する方向に配置された倒I字状の3種類の栓刃を挿入可能なT形状を成して、互いに異なる形状の栓刃挿入口が左右に配置されると共に、コンセントケースの栓刃挿入口の間に、栓刃挿入口に挿入された接続プラグの栓刃間で発生する放電を検知するための検知孔が複数形成されて成り、検知孔のうちの1つが、栓刃挿入口間の中間位置で且つ中央に形成され、加えて栓刃挿入口の上部の中間位置、及び下部の中間位置のうちの少なくとも一方にも形成されて成ることを特徴とする。
この構成によれば、挿入された栓刃に対して、栓刃間の中央と、栓刃端部間の少なくとも一方の中間位置に検知孔を有するため、平行配置されたI字状の栓刃の間で発生する放電は中央の検知孔により良好に検知できるし、N極側がL字状或いは他方に直交配置された栓刃である場合は、栓刃挿入口の端部に合わせて形成した検知孔により検知できるため、何れの形状に栓刃であってもトラッキング前の放電を検知できる。
In order to solve the above problem, the invention of claim 1 is a power outlet in which a pair of plug blade insertion ports and a grounding electrode insertion port are formed on the front surface of an outlet case and a connection plug having a grounding electrode can be connected. One of the plug blade insertion ports has an I-shape into which an I-shaped plug blade can be inserted, while the other has an L-shape in addition to the I-shape, and one I-shaped plug blade. It has a T-shape that allows you to insert three types of inverted I-shaped plug blades that are arranged in the direction orthogonal to each other. A plurality of detection holes for detecting the discharge generated between the plug blades of the connection plug inserted into the plug blade insertion port are formed between the insertion ports, and one of the detection holes is the plug blade insertion port. It is characterized in that it is formed at an intermediate position between them and at the center, and is also formed at at least one of an upper intermediate position and a lower intermediate position of the plug cutting opening.
According to this configuration, since the inserted plug blade has a detection hole at at least one intermediate position between the center between the plug blades and the end of the plug blade, the I-shaped plug blades arranged in parallel are arranged. The discharge generated between them can be detected well by the detection hole in the center, and when the N pole side is an L-shaped or orthogonally arranged plug blade, it is formed according to the end of the plug blade insertion port. Since it can be detected by the detection hole, it is possible to detect the discharge before tracking regardless of the shape of the plug blade.

請求項2の発明は、請求項1に記載の構成において、検知孔は、栓刃挿入口の間の中間位置の中央部と、栓刃挿入口の上部の中間位置、及び下部の中間位置の計3カ所に形成されて成ることを特徴とする。
この構成によれば、N極側がI形状、L字状或いは他方に直交する平坦な栓刃であっても、3カ所設けた検知孔により確実にトラッキング前の放電を検知できる。
According to the second aspect of the present invention, in the configuration according to the first aspect, the detection hole is located at the central portion of the intermediate position between the plug blade insertion openings, the upper intermediate position of the plug blade insertion port, and the lower intermediate position. It is characterized by being formed in a total of three places.
According to this configuration, even if the N pole side is I-shaped, L-shaped, or a flat plug blade orthogonal to the other, the discharge before tracking can be reliably detected by the detection holes provided at three places.

本発明によれば、挿入された栓刃に対して、栓刃間の中央と、栓刃端部間の少なくとも一方の中間位置に検知孔を有するため、平行配置されたI字状の栓刃の間で発生する放電は中央の検知孔により良好に検知できるし、N極側がL字状或いは他方に直交配置された栓刃である場合は、栓刃挿入口の端部に合わせて形成した検知孔により検知できるため、何れの形状に栓刃であってもトラッキング前の放電を検知できる。 According to the present invention, since the inserted plug blade has a detection hole at at least one intermediate position between the center between the plug blades and the end of the plug blade, the I-shaped plug blades arranged in parallel are arranged. The discharge generated between them can be detected well by the detection hole in the center, and when the N pole side is an L-shaped or orthogonally arranged plug blade, it is formed according to the end of the plug blade insertion port. Since it can be detected by the detection hole, it is possible to detect the discharge before tracking regardless of the shape of the plug blade.

本発明に係る電源コンセントの一例を示すコンセントの正面説明図である。It is a front explanatory view of the outlet which shows an example of the power outlet which concerns on this invention. 図1の電源コンセントに接続可能な接続プラグの説明図である。It is explanatory drawing of the connection plug which can be connected to the power outlet of FIG. 栓刃間で発生する放電の説明図である。It is explanatory drawing of the electric discharge generated between the plug blades. 検知孔とセンサの説明図である。It is explanatory drawing of the detection hole and a sensor.

以下、本発明を具体化した実施の形態を、図面を参照して詳細に説明する。図1は本発明に係る電源コンセントの正面説明図であり、1(1a,1b)は接続プラグの栓刃を挿入する一対の栓刃挿入口、2は接続プラグの接地極を挿入する接地極挿入口、3はトラッキング発生前の放電を検知するための検知孔である。これらはコンセントケース10の前面に設けられ、コンセントケース10の内部には、検知孔3を介して栓刃間で発生する放電を検知するセンサ及び放電検知回路、更に放電が発生したら電路を遮断する遮断機構等が組み込まれている。 Hereinafter, embodiments that embody the present invention will be described in detail with reference to the drawings. FIG. 1 is a front explanatory view of a power outlet according to the present invention, where 1 (1a, 1b) is a pair of plug blade insertion openings for inserting a plug blade of a connection plug, and 2 is a ground electrode for inserting a ground electrode of a connection plug. The insertion port 3 is a detection hole for detecting the discharge before the occurrence of tracking. These are provided on the front surface of the outlet case 10, and inside the outlet case 10, a sensor and a discharge detection circuit for detecting the discharge generated between the plug blades through the detection hole 3, and further shut off the electric circuit when the discharge occurs. It has a built-in shut-off mechanism.

尚、接続プラグの栓刃の間隔(栓刃挿入口1の間隔)及び接地極挿入口2の位置は、JIS規格で決められている。また図1では、栓刃挿入口1は左右に配置され、接地極挿入口2はその中間位置の下部に配置されているが、コンセントケース10の向きは上下方向が限定されないため、90度回転して設置された場合は、栓刃挿入口1は上下に配置され、その横方向に接地極挿入口2が配置されることになる。 The distance between the plug blades of the connection plug (the distance between the plug blade insertion ports 1) and the position of the grounding electrode insertion port 2 are determined by the JIS standard. Further, in FIG. 1, the plug blade insertion port 1 is arranged on the left and right, and the ground electrode insertion port 2 is arranged at the lower part of the intermediate position thereof. When installed, the plug blade insertion port 1 is arranged vertically, and the ground electrode insertion port 2 is arranged in the lateral direction thereof.

図2は図1の電源コンセントに接続可能な栓刃5,5を備えた3種類の接続プラグ4を示している。図2において、(a)は同一のI字状の2枚の栓刃5a,5aを平行に配置した一般的な家庭用100Vの2極接続プラグ、(b)はI字状の栓刃5aとL字状の栓刃5bを備えた20アンペア対応の接地極無しの接続プラグ、(C)は同一のI字状であるが互いに直交するように配置した栓刃5a、5cを備え、更に接地極6を備えた20アンペア対応の接続プラグをそれぞれ示している。
このように、図1の電源コンセントはこれら3種類の接続プラグ4を接続可能としているため、栓刃挿入口1のうち、右側の栓刃挿入口1bはI形状とする一方で、左側の栓刃挿入口1aはT形状として、縦のI字状、横のI字状、そしてL字状の3種類の栓刃5(5a,5b,5c)を挿入可能としている。
FIG. 2 shows three types of connection plugs 4 having blades 5 and 5 that can be connected to the power outlet of FIG. In FIG. 2, (a) is a general household 100V 2-pole connection plug in which two identical I-shaped blades 5a and 5a are arranged in parallel, and (b) is an I-shaped blade 5a. And a 20 amp-compatible connection plug without a grounding electrode equipped with an L-shaped blade 5b, (C) has the same I-shaped blades 5a and 5c arranged so as to be orthogonal to each other, and further. Each shows a 20 amp capable connection plug with a grounding electrode 6.
As described above, since the power outlet of FIG. 1 can connect these three types of connection plugs 4, the plug blade insertion port 1b on the right side of the plug blade insertion port 1 has an I shape, while the plug on the left side. The blade insertion port 1a has a T-shape, and three types of plug blades 5 (5a, 5b, 5c) having a vertical I-shape, a horizontal I-shape, and an L-shape can be inserted.

上記の如く形成された電源コンセントにおいて、図1に示すように検知孔3は3カ所設けられている。具体的に、栓刃挿入口1a,1bの中間位置で且つ中央に第1の孔3aが穿設され、その上方で栓刃5aの上端に対応する栓刃挿入口1の上部に第2の孔3bが穿設され、反対方向の栓刃5aの下端に対応する栓刃挿入口1の下部に第3の孔3cが穿設されている。 In the power outlet formed as described above, as shown in FIG. 1, three detection holes 3 are provided. Specifically, a first hole 3a is formed at an intermediate position between the plug blade insertion ports 1a and 1b and in the center, and a second hole 3a is formed above the first hole 3a and above the plug blade insertion port 1 corresponding to the upper end of the plug blade 5a. A hole 3b is formed, and a third hole 3c is formed in the lower portion of the plug blade insertion port 1 corresponding to the lower end of the plug blade 5a in the opposite direction.

図3は、栓刃間で発生する放電の説明図であり、検知孔3との関係を示している。図3において、連続する「+」の記号で示す経路Sは何れも放電の経路を示し、実験より最初に発生する放電はこの経路Sで示す位置で発生する確率が高いことが確認されている。
具体的に、図3(a)は図2(a)に示す栓刃5a,5aの間で発生する放電の経路、図3(b)は図2(b)に示す栓刃5a,5bの間で発生する放電の経路、図3(c)は図2(c)に示す栓刃5a,5cの間で発生する放電の経路をそれぞれ示している。
FIG. 3 is an explanatory diagram of the discharge generated between the plug blades, and shows the relationship with the detection hole 3. In FIG. 3, all the paths S indicated by the continuous “+” symbols indicate the discharge paths, and it is confirmed from the experiment that the discharge that occurs first has a high probability of occurring at the position indicated by this path S. ..
Specifically, FIG. 3A shows the path of the discharge generated between the plug blades 5a and 5a shown in FIG. 2A, and FIG. 3B shows the plug blades 5a and 5b shown in FIG. 2B. The discharge path generated between them and FIG. 3 (c) show the discharge path generated between the plug blades 5a and 5c shown in FIG. 2 (c), respectively.

図3に示すように、平行する2枚の栓刃が接続されている場合は、中央に形成された第1の孔3aの前方で発生し易く、一方がL字状の栓刃の場合及び直交する栓刃を有する場合は、上部の第2の孔3b或いは第3の孔3cの何れかの前方で発生し易い。
そのため、3個の検知孔3を列設することで、3種類の接続プラグ4に対して、良好に放電を検知できる。
As shown in FIG. 3, when two parallel blades are connected, it is likely to occur in front of the first hole 3a formed in the center, and when one of them is an L-shaped blade and When the blades are orthogonal to each other, it tends to occur in front of either the second hole 3b or the third hole 3c at the upper part.
Therefore, by arranging the three detection holes 3 in a row, the discharge can be satisfactorily detected for the three types of connection plugs 4.

図4は、検知孔3に対するセンサの配置を示している。検知孔3が穿設されたコンセントケース10の前面背部には、センサとしてのリード線7の芯線7aが3個の検知孔3に掛かるように配置されている。尚、リード線7は図示しない放電検知回路に接続されているが省略している。
芯線7aは、コンセントケース10の前面背部に密着するよう配置され、検知孔3の奥部に配置されている。こうしてコンセントケース10の前面において発生する放電が検知孔3を介して芯線7aに達するよう構成されている。尚、8は芯線7aを背部から覆い芯線7aを保護する絶縁シートを示している。
FIG. 4 shows the arrangement of the sensor with respect to the detection hole 3. On the back surface of the front surface of the outlet case 10 in which the detection holes 3 are bored, the core wires 7a of the lead wires 7 as sensors are arranged so as to hang on the three detection holes 3. Although the lead wire 7 is connected to a discharge detection circuit (not shown), it is omitted.
The core wire 7a is arranged so as to be in close contact with the front back portion of the outlet case 10, and is arranged at the back portion of the detection hole 3. In this way, the discharge generated on the front surface of the outlet case 10 is configured to reach the core wire 7a through the detection hole 3. Reference numeral 8 indicates an insulating sheet that covers the core wire 7a from the back surface and protects the core wire 7a.

このように、挿入された接続プラグ4の栓刃5に対して、栓刃5間の中央と、栓刃5の端部間に検知孔3(第1の孔3a、第2の孔3b、第3の孔3c)を有するため、平行配置されたI字状の栓刃5の間で発生する放電は中央の第1の孔3aにより検知し、N極側がL字状或いは他方に直交配置された栓刃5である場合は、栓刃挿入口1の端部に合わせて形成した第2の孔3b、或いは第3の孔3cにより検知できるため、何れの形状の栓刃5であってもトラッキング発生前の放電を検知できる。 In this way, with respect to the plug blade 5 of the inserted connection plug 4, the detection hole 3 (first hole 3a, second hole 3b, between the center between the plug blades 5 and the end portion of the plug blade 5 Since it has a third hole 3c), the discharge generated between the I-shaped blades 5 arranged in parallel is detected by the first hole 3a in the center, and the N pole side is L-shaped or orthogonal to the other. In the case of the plug blade 5, the plug blade 5 has any shape because it can be detected by the second hole 3b or the third hole 3c formed in accordance with the end portion of the plug blade insertion port 1. Can also detect discharge before tracking occurs.

尚、上記実施形態では、検知孔3を3個設けた構成を示しているが、第1の孔3aと第2の孔3bの2個、第1の孔3aと第3の孔3cの2個でも良く、3種類の接続プラグ4に対して早期の放電の検知は可能である。
また、1つの接続プラグ4を接続する電源コンセントを説明しているが、コンセントケースに複数の電源コンセントを備えた構成も含むものである。
Although the above embodiment shows a configuration in which three detection holes 3 are provided, two of the first hole 3a and the second hole 3b, and two of the first hole 3a and the third hole 3c are shown. It may be an individual number, and early discharge detection is possible for three types of connection plugs 4.
Further, although the power outlet for connecting one connection plug 4 is described, the configuration also includes a configuration in which a plurality of power outlets are provided in the outlet case.

1・・栓刃挿入口、2・・接地極挿入口、3・・検知孔、4・・接続プラグ、10・・コンセントケース。 1 ... Plug blade insertion port, 2 ... Grounding electrode insertion port, 3 ... Detection hole, 4 ... Connection plug, 10 ... Outlet case.

Claims (2)

一対の栓刃挿入口と接地極挿入口とがコンセントケースの前面に形成されて、接地極を有する接続プラグを接続可能な電源コンセントであって、
前記栓刃挿入口は、一方がI字状の栓刃を挿入可能なI形状を成す一方、他方が、I字状に加えてL字状、更には前記一方のI字状の栓刃に直交する方向に配置された倒I字状の3種類の栓刃を挿入可能なT形状を成して、互いに異なる形状の栓刃挿入口が左右に配置されると共に、
前記コンセントケースの前記栓刃挿入口の間に、前記栓刃挿入口に挿入された前記接続プラグの栓刃間で発生する放電を検知するための検知孔が複数形成されて成り、
前記検知孔のうちの1つが、前記栓刃挿入口間の中間位置で且つ中央に形成され、
加えて前記栓刃挿入口の上部の中間位置、及び下部の中間位置のうちの少なくとも一方にも形成されて成ることを特徴とする電源コンセント。
A power outlet in which a pair of plug blade insertion ports and a grounding electrode insertion port are formed on the front surface of the outlet case, and a connection plug having a grounding electrode can be connected.
One of the plug blade insertion openings has an I-shape into which an I-shaped plug blade can be inserted, while the other has an L-shape in addition to the I-shape, and further to the one I-shaped plug blade. Three types of inverted I-shaped blades arranged in orthogonal directions form a T shape that can be inserted, and blade blade insertion openings with different shapes are arranged on the left and right.
A plurality of detection holes for detecting the discharge generated between the plug blades of the connection plug inserted into the plug blade insertion port are formed between the plug blade insertion ports of the outlet case.
One of the detection holes is formed at an intermediate position and in the center between the plug blade insertion openings.
In addition, a power outlet characterized in that it is formed at at least one of the upper intermediate position and the lower intermediate position of the plug blade insertion port.
前記検知孔は、前記栓刃挿入口の間の中間位置の中央部と、前記栓刃挿入口の上部の中間位置、及び下部の中間位置の計3カ所に形成されて成ることを特徴とする請求項1記載の電源コンセント。 The detection hole is characterized in that it is formed at a total of three positions, that is, a central portion of an intermediate position between the plug blade insertion ports, an upper intermediate position of the plug blade insertion port, and an intermediate position of the lower portion. The power outlet according to claim 1.
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JP2006048961A (en) 2004-07-30 2006-02-16 Kawamura Electric Inc Power outlet
JP2006048964A (en) 2004-07-30 2006-02-16 Kawamura Electric Inc Power outlet

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004327247A (en) 2003-04-24 2004-11-18 Kawamura Electric Inc Power supply receptacle
US20060030183A1 (en) 2004-07-30 2006-02-09 Kawamura Electric, Inc. Power source outlet device
JP2006048961A (en) 2004-07-30 2006-02-16 Kawamura Electric Inc Power outlet
JP2006048964A (en) 2004-07-30 2006-02-16 Kawamura Electric Inc Power outlet

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