JP2007317377A - Terminal device for grounding - Google Patents

Terminal device for grounding Download PDF

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Publication number
JP2007317377A
JP2007317377A JP2006142537A JP2006142537A JP2007317377A JP 2007317377 A JP2007317377 A JP 2007317377A JP 2006142537 A JP2006142537 A JP 2006142537A JP 2006142537 A JP2006142537 A JP 2006142537A JP 2007317377 A JP2007317377 A JP 2007317377A
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Prior art keywords
grounding
movable plate
side terminal
terminal
ground
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JP2006142537A
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JP4805020B2 (en
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Motoyuki Nakamura
元幸 中村
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Nippon Cable Co Ltd
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Nippon Cable Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a terminal device for grounding which allows grounding connection of electric equipments without omission when a facility operates. <P>SOLUTION: The terminal device for grounding is provided with an equipment side terminal which is connected to an electric equipment side, and a grounding side terminal connected to a grounding side on an insulating stage; and comprises a movable plate for connecting/disconnecting between the grounding side terminal and the equipment side terminal. The terminal device for grounding is equipped with a movable plate detecting means for detecting whether the movable plate is connected or disconnected. A security circuit permits operation of the electric equipment when the grounding side terminal is connected to the equipment side terminal, while prohibiting operation of it when disconnected, based on the signal from the movable plate detecting means. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、制御盤等に取り付けられ、電気機器や電気回路等をアースするのに利用される接地用端子装置に関する。   The present invention relates to a grounding terminal device that is attached to a control panel or the like and is used for grounding an electrical device, an electrical circuit, or the like.

各種電気機器を備えた機械装置等の制御装置付近に落雷があると、雷サージが接地側より機器側に進入し機器の損傷を招くため、これを防止するためにサージ防護装置や過電圧保護器等の電気部品による対策が行われる。しかしながら、これらの部品は高額であるとともに、繰り返し雷サージを受けることによりいずれは劣化して損傷に至る消耗部品である。   If there is a lightning strike in the vicinity of a control device such as a mechanical device equipped with various electrical equipment, a lightning surge enters the equipment side from the ground side and causes damage to the equipment. To prevent this, a surge protection device or overvoltage protector Measures by electrical parts such as are taken. However, these parts are expensive and are consumable parts that eventually deteriorate due to repeated lightning surges.

このような雷による被害を予防する対策として、スキーリフト等のように一定期間しか設備を稼働せず長期にわたって運休期間がある設備においては、この運休期間中に電気機器側と接地側とを接続している端子台において接続を切断し、接地側からの雷サージの進入を防止する方法が用いられる。   As a measure to prevent such lightning damage, in equipment such as ski lifts that operate equipment only for a certain period and have a long suspension period, the electrical equipment side and the ground side are connected during this suspension period. A method is used in which the connection is cut at the terminal block that is connected to prevent the entry of lightning surge from the ground side.

接地用端子台は種々のものがあるが、接地抵抗測定時の利便性を考慮して、機器側の端子と接地側の端子間を連結、切断可能にプレートを架け渡すようにしたものがある（例えば特許文献１参照）。上記のように接地側を切断する場合には、このような端子台を用いておけば容易に接地側との接続を切断することができる。
特開２００３−１０９６８４号公報 There are various types of grounding terminal blocks, but in consideration of the convenience when measuring grounding resistance, there are those that connect the terminal on the equipment side and the grounding side terminal and bridge the plate so that it can be disconnected. (For example, refer to Patent Document 1). When the ground side is cut as described above, the connection with the ground side can be easily cut by using such a terminal block.
JP 2003-109684 A

しかしながら、上記のように長期にわたって接地を切断した場合には、設備の稼働を再開するのに際して接地の接続を忘れてしまうおそれがある。そして、このように電気機器類の接地が行われずに設備が稼働されると、万が一電気機器の漏電等が起きた場合には漏電火災や感電等の事故が発生する可能性がある。   However, when the ground is disconnected for a long time as described above, the ground connection may be forgotten when the operation of the facility is resumed. If the equipment is operated without grounding the electrical equipment in this way, there is a possibility that an accident such as an earth leakage fire or an electric shock may occur if the electrical equipment leaks.

本発明の課題は、このような事情に鑑みてなされたものであって、設備の稼働時に電気機器類の接地接続を忘れることなく確実に行うことのできる接地用端子装置の提供にある。   The subject of this invention is made | formed in view of such a situation, Comprising: It exists in provision of the terminal device for earthing | grounding which can be reliably performed without forgetting the earthing connection of electrical equipment at the time of operation of an installation.

このような課題を解決するために本発明は、絶縁性の基台に電気機器側に接続される機器側端子部と、接地側に接続される接地側端子部を設け、該接地側端子部と前記機器側端子部との間を接続及び切断することのできる可動プレートを有する接地用端子装置であって、該接地用端子装置には前記可動プレートが接続あるいは切断されていることを検出する可動プレート検出手段を設け、該可動プレート検出手段の信号により前記接地側端子部と前記機器側端子部が接続されているときに前記電気機器の運転を可能とし、切断されているときに電気機器の運転を不可能とする保安回路を設けたことを特徴としている。   In order to solve such a problem, the present invention provides a device-side terminal portion connected to the electric device side and a ground-side terminal portion connected to the ground side on an insulating base, and the ground-side terminal portion A grounding terminal device having a movable plate capable of connecting and disconnecting between the terminal and the device side terminal portion, wherein the grounding terminal device detects that the movable plate is connected or disconnected. A movable plate detecting means is provided, and the electric device can be operated when the ground side terminal portion and the device side terminal portion are connected by a signal of the movable plate detecting means, and the electric device is disconnected. It is characterized by providing a safety circuit that makes it impossible to operate.

本発明においては、電気機器側と接地側との接続及び切断を検出して、電気機器側と接地側が接続されているときには電気機器の運転を可能とし、切断されているときには電気機器の運転を不可能にしているので、一旦電気機器側と接地側を切断する作業を行った後、再び電気機器の運転を再開する場合に接地の接続作業を忘れることがなく、確実に電気機器が接地された状態で運転されるので、接地忘れによる感電事故や漏電火災を防止することができる。   In the present invention, the connection and disconnection between the electrical device side and the ground side is detected, and the electrical device can be operated when the electrical device side and the ground side are connected, and the electrical device is operated when disconnected. Therefore, once you have disconnected the electrical equipment side and the grounding side, do not forget to connect the grounding when you resume the operation of the electrical equipment. Because it is operated in a closed state, it is possible to prevent an electric shock accident and a leakage fire due to forgetting to ground.

以下、本発明の実施の形態について、図面を参照して説明する。図１乃至図３において、絶縁材料からなる基台１１には、４本のボルト１２ａ、１２ｂ、１２ｃ、１２ｄが基台１１からネジ部が突出するように埋め込まれている。両端のボルト１２ａ、１２ｄと中央側のボルト１２ｂ、１２ｃとにおいて、それぞれ隣り合うボルト１２ａと１２ｂ及び１２ｃと１２ｄにはそれぞれ金属製の接続プレート１３が装着されており、ワッシャ１５及びスプリングワッシャ１６を介してナット１４により固定されている。そして、このように接続プレート１３により連結された組み合わせの内の一組は、電気機器側と接続される機器側端子部であり、他方の一組は接地側と接続される接地側端子部である。   Embodiments of the present invention will be described below with reference to the drawings. 1 to 3, four bolts 12 a, 12 b, 12 c, and 12 d are embedded in a base 11 made of an insulating material so that screw portions protrude from the base 11. In the bolts 12a and 12d at both ends and the bolts 12b and 12c at the center side, the adjacent connection bolts 12a and 12b and 12c and 12d are mounted with metal connection plates 13, respectively, and a washer 15 and a spring washer 16 are attached. Through the nut 14. One set of the combinations connected by the connection plate 13 in this way is a device side terminal portion connected to the electric device side, and the other set is a ground side terminal portion connected to the ground side. is there.

各ボルト１２ａ、１２ｂ、１２ｃ、１２ｄには、前記ナット１４の上部に２枚のワッシャ１７、スプリングワッシャ１８及びナット１９が装着される。そして、両端のボルト１２ａ及び１２ｄのワッシャ１７の間には、それぞれ電気機器側の配線と接地側の配線が挟み込まれて接続され、中央側のボルト１２ｂ及び１２ｃのワッシャ１７間には、金属製の可動プレート２０が挟み込まれる。   Each of the bolts 12a, 12b, 12c, and 12d is provided with two washers 17, a spring washer 18, and a nut 19 on the nut 14. Between the washer 17 of the bolts 12a and 12d at both ends, a wiring on the electric device side and a wiring on the ground side are sandwiched and connected, respectively, and between the washer 17 of the bolts 12b and 12c on the center side, The movable plate 20 is sandwiched.

可動プレート２０には、一端部にＵ字状溝２１が形成されており、一方他端部には長孔２２が形成されている。そして、Ｕ字状溝２１にはボルト１２ｃが遊挿され、一方、長孔２２にはボルト１２ｂが遊挿される。そして、この可動プレート２０は、ボルト１２ｂ及びボルト１２ｃに備えたナット１９を締め込むことにより両ボルト１２ｂ、１２ｃ間に固定されるとともに、両ボルト１２ｂ、１２ｃ間が電気的に接続された状態となる。一方、この両ナット１９を緩めると可動プレート２０は、ボルト１２ｂを支点として回動可能となり、２点鎖線で示すようにボルト１２ｃとの連結を解除することにより、両ボルト１２ｂ、１２ｃ間を電気的に切断することができる。   A U-shaped groove 21 is formed at one end of the movable plate 20, and a long hole 22 is formed at the other end. The bolt 12 c is loosely inserted into the U-shaped groove 21, while the bolt 12 b is loosely inserted into the long hole 22. The movable plate 20 is fixed between the bolts 12b and 12c by tightening the bolts 12b and nuts 19 provided on the bolts 12c, and the bolts 12b and 12c are electrically connected. Become. On the other hand, when the nuts 19 are loosened, the movable plate 20 can be rotated with the bolt 12b as a fulcrum, and the connection between the bolt 12b and 12c is released by releasing the connection with the bolt 12c as shown by a two-dot chain line. Can be cut.

次に、基台１１の側面には絶縁材料からなるＬ字形状のブラケット２３が固着されており、このブラケット２３の上部には、可動プレート検出手段であるマイクロスイッチ２４が固着されている。ここで、マイクロスイッチ２４のアクチュエータ部２５に備えた樹脂製のローラ２６は、可動プレート２０の側面と接する位置に設定されており、可動プレート２０がボルト１２ｂと１２ｃとを連結した状態でローラ２６が当接し、マイクロスイッチ２４がＯＮの状態となる。そして、可動プレート２０の連結が解除されると、前記ローラ２６は可動プレート２０と離反し、マイクロスイッチ２４はＯＦＦの状態となる。   Next, an L-shaped bracket 23 made of an insulating material is fixed to the side surface of the base 11, and a micro switch 24 that is a movable plate detecting means is fixed to the upper portion of the bracket 23. Here, the resin roller 26 provided in the actuator unit 25 of the microswitch 24 is set at a position in contact with the side surface of the movable plate 20, and the roller 26 is in a state where the movable plate 20 connects the bolts 12 b and 12 c. Comes into contact with each other, and the micro switch 24 is turned on. When the connection of the movable plate 20 is released, the roller 26 is separated from the movable plate 20, and the microswitch 24 is turned off.

以上の説明では、可動プレート検出手段としてマイクロスイッチ２４を用いた例を示したが、この例に限られることなく、例えば非接触型の近接スイッチや光電スイッチ等を用いた公知の手段により、可動プレート検出手段を構成することもできる。   In the above description, the example using the microswitch 24 as the movable plate detecting means has been shown. However, the present invention is not limited to this example, and the movable plate detecting means can be moved by a known means using, for example, a non-contact type proximity switch or a photoelectric switch. Plate detection means can also be configured.

このマイクロスイッチ２４は、電気機器側の運転保安回路に接続されており、マイクロスイッチ２４がＯＮのときは運転保安回路が成立して電気機器の運転が可能となり、一方マイクロスイッチ２４がＯＦＦのときは運転保安回路が成立せず運転が不可能になるようにしている。すなわち、可動プレート２０がボルト１２ｂと１２ｃを連結し、電気機器側と接地側が連結されると電気機器の運転が可能であり、可動プレート２０の連結が解除されて電気機器側と接地側が切断されると電気機器の運転を不可能にしているのである。   The microswitch 24 is connected to an operation / safety circuit on the electric device side. When the microswitch 24 is turned on, the operation / safety circuit is established and the electric device can be operated, while when the microswitch 24 is turned off. Does not establish a driving safety circuit and makes driving impossible. That is, when the movable plate 20 connects the bolts 12b and 12c and the electric device side and the ground side are connected, the electric device can be operated, and the connection of the movable plate 20 is released and the electric device side and the ground side are disconnected. This makes it impossible to operate electrical equipment.

以上のように構成された接地用端子装置を用いて、長期にわたって電気機器の運転を行わないときには、可動プレート２０の連結を解除して電気機器側と接地側の接続を切断しておけば、運休中に落雷があっても接地側からの雷サージの進入を防止することができ、電気機器の損傷を防止することができる。そして、運転の再開時には上記したように、可動プレート２０が接続された状態でなければ運転が不可能とされており、可動プレート２０を復帰させ、電気機器側と接地側との接続が確実に行われた後に運転が行われるので、電気的に安全な状態での運行が可能となる。   When the electric terminal is not operated over a long period of time using the grounding terminal device configured as described above, if the connection between the electric device side and the ground side is disconnected by releasing the connection of the movable plate 20, Even if there is a lightning strike during non-operation, it is possible to prevent the entry of a lightning surge from the ground side, and it is possible to prevent damage to electrical equipment. As described above, when the operation is resumed, the operation is impossible unless the movable plate 20 is connected, and the movable plate 20 is returned to ensure the connection between the electric device side and the ground side. Since the operation is performed after the operation, operation in an electrically safe state is possible.

接地用端子装置の平面図Plan view of grounding terminal device 接地用端子装置の正面図Front view of grounding terminal device 図２におけるＡ−Ａ矢視図AA arrow view in FIG.

符号の説明Explanation of symbols

１１ 基台
１２ａ、１２ｂ、１２ｃ、１２ｄ ボルト
１３ 接続プレート
１４ ナット
１５ ワッシャ
１６ スプリングワッシャ
１７ ワッシャ
１８ スプリングワッシャ
１９ ナット
２０ 可動プレート
２１ Ｕ字状溝
２２ 長孔
２３ ブラケット
２４ マイクロスイッチ
２５ アクチュエータ部
２６ ローラ 11 Base 12a, 12b, 12c, 12d Bolt 13 Connection plate 14 Nut 15 Washer 16 Spring washer 17 Washer 18 Spring washer 19 Nut 20 Movable plate 21 U-shaped groove 22 Long hole 23 Bracket 24 Micro switch 25 Actuator section 26 Roller

Claims (1)

絶縁性の基台に電気機器側に接続される機器側端子部と、接地側に接続される接地側端子部を設け、該接地側端子部と前記機器側端子部との間を接続及び切断することのできる可動プレートを有する接地用端子装置であって、該接地用端子装置には前記可動プレートが接続あるいは切断されていることを検出する可動プレート検出手段を設け、該可動プレート検出手段の信号により前記接地側端子部と前記機器側端子部が接続されているときに前記電気機器の運転を可能とし、切断されているときに電気機器の運転を不可能とする保安回路を設けたことを特徴とする接地用端子装置。   Provide an equipment-side terminal connected to the electrical equipment side on the insulating base and a ground-side terminal connected to the ground side, and connect and disconnect between the ground-side terminal and the equipment-side terminal A grounding terminal device having a movable plate that can be provided, wherein the grounding terminal device is provided with a movable plate detecting means for detecting that the movable plate is connected or disconnected, and the movable plate detecting means Provided a safety circuit that enables operation of the electrical device when the ground side terminal portion and the device side terminal portion are connected by a signal, and disables the operation of the electrical device when disconnected. A terminal device for grounding.
JP2006142537A 2006-05-23 2006-05-23 Grounding terminal device Active JP4805020B2 (en)

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JP4805020B2 JP4805020B2 (en) 2011-11-02

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009146724A (en) * 2007-12-14 2009-07-02 Sankosha Corp Safety device
JP2014506347A (en) * 2010-11-30 2014-03-13 パンドウィット・コーポレーション Physical infrastructure management system with integrated cabinet

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6296271U (en) * 1985-12-05 1987-06-19
JPH0318144A (en) * 1989-06-14 1991-01-25 Fujitsu Ltd Lan adaptor
JPH10116653A (en) * 1996-10-11 1998-05-06 Nanbu Kasei Kk Earth sensing control device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6296271U (en) * 1985-12-05 1987-06-19
JPH0318144A (en) * 1989-06-14 1991-01-25 Fujitsu Ltd Lan adaptor
JPH10116653A (en) * 1996-10-11 1998-05-06 Nanbu Kasei Kk Earth sensing control device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009146724A (en) * 2007-12-14 2009-07-02 Sankosha Corp Safety device
JP2014506347A (en) * 2010-11-30 2014-03-13 パンドウィット・コーポレーション Physical infrastructure management system with integrated cabinet

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