JP2007242569A - Protection element deterioration / operation display device - Google Patents

Protection element deterioration / operation display device Download PDF

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JP2007242569A
JP2007242569A JP2006066927A JP2006066927A JP2007242569A JP 2007242569 A JP2007242569 A JP 2007242569A JP 2006066927 A JP2006066927 A JP 2006066927A JP 2006066927 A JP2006066927 A JP 2006066927A JP 2007242569 A JP2007242569 A JP 2007242569A
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heat
deterioration
protection element
display device
shrinkable material
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JP4711339B2 (en
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Shunichi Yanagawa
俊一 柳川
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Shoden Corp
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Abstract

【課題】極めて簡単な構成により、保護素子の劣化や動作状態を確実に表示可能とし、低コストにて製造可能とした劣化・動作表示装置を提供する。
【解決手段】保護素子の劣化または動作を視覚的に表示するようにしたバリスタ等の保護素子の劣化・動作表示装置に関する。劣化または動作した保護素子２１が発生する熱が伝導される熱伝導板１と、この熱伝導板１の熱により収縮、退避する熱収縮材２と、この熱収縮材２収縮、退避時に、窓部１ｄを介して外部から目視される表示材３と、を備え、この表示材３により、保護素子２１の劣化または動作を表示する。
【選択図】図１The present invention provides a deterioration / operation display device capable of reliably displaying deterioration and an operation state of a protection element with an extremely simple configuration and capable of being manufactured at low cost.
The present invention relates to a deterioration / operation display device for a protection element such as a varistor that visually displays the deterioration or operation of the protection element. The heat conduction plate 1 through which heat generated by the deteriorated or operated protection element 21 is conducted, the heat shrinkable material 2 that shrinks and retreats by the heat of the heat conduction plate 1, and the heat shrinkable material 2 contracts and retreats when the window is opened. A display material 3 that is viewed from the outside through the part 1d, and the display material 3 displays the deterioration or operation of the protective element 21.
[Selection] Figure 1

Description

本発明は、雷等の過電圧、過電流から各種機器を保護するための保護素子の劣化・動作表示装置に関し、詳しくは、バリスタ、アレスタ等の保護素子が発生する熱を検出して劣化状態、動作状態を表示可能とした表示装置に関するものである。   The present invention relates to a deterioration / operation display device of a protection element for protecting various devices from overvoltage and overcurrent such as lightning, and more specifically, by detecting heat generated by a protection element such as a varistor or arrester, The present invention relates to a display device capable of displaying an operation state.

この種の表示装置の従来技術として、例えば特許文献１，２に記載されているように、避雷素子に流れる漏洩電流を検出して避雷素子の劣化を表示する表示装置が知られている。
また、特許文献３に記載されているように、避雷器の劣化時や短絡破壊時に導電性プラスチックを溶断させてスプリングにより表示部を動作させる切り離し装置も公知となっており、更には、温度ヒューズやハンダを溶融させてスプリングにより表示部を動作させる劣化表示装置も既に知られている。 As a conventional technique of this type of display device, for example, as described in Patent Documents 1 and 2, a display device that detects a leakage current flowing through a lightning arrester and displays the deterioration of the lightning arrester is known.
Further, as described in Patent Document 3, a disconnecting device is also known in which a conductive plastic is blown when a lightning arrester is deteriorated or a short circuit breaks, and a display unit is operated by a spring. A deterioration display device that melts solder and operates a display unit with a spring is already known.

特開平６−５３５０号公報（段落［０００８］〜［００１９］、図１等）JP-A-6-5350 (paragraphs [0008] to [0019], FIG. 1 etc.) 特開平８−２０３４１５号公報（段落［００１０］〜［００１３］、図１等）JP-A-8-203415 (paragraphs [0010] to [0013], FIG. 1 etc.) 特開平２−１１７０８３号公報（第２頁右下欄第１７行〜第３頁左下欄第７行、第１図等）Japanese Patent Laid-Open No. 2-117083 (page 2, lower right column, line 17 to page 3, lower left column, line 7, FIG. 1, etc.)

特許文献１，２に記載された従来技術では、漏洩電流を検出して表示部を動作させるための回路構成が複雑であり、コストが高くなるという問題がある。
また、特許文献３に記載された従来技術や温度ヒューズ、ハンダ等を用いる従来技術では、表示部を駆動するためのスプリング等が構造の複雑化や大型化の原因になり、特に、ハンダを溶融させる方式では、ハンダ付け作業に熟練が必要であると共に、個人差によって検出精度が安定せず、信頼性が低い等の問題があった。 In the conventional techniques described in Patent Documents 1 and 2, there is a problem that the circuit configuration for detecting the leakage current and operating the display unit is complicated, and the cost is increased.
Further, in the conventional technique described in Patent Document 3 and the conventional technique using a thermal fuse, solder, etc., a spring for driving the display unit causes a complicated structure and an increase in size, and in particular, melts the solder. In the method, the soldering work requires skill, and the detection accuracy is not stable due to individual differences, resulting in low reliability.

そこで本発明の解決課題は、極めて簡単な構成により、保護素子の劣化や動作状態を確実に表示可能とし、低コストにて製造可能とした劣化・動作表示装置を提供することにある。   SUMMARY OF THE INVENTION An object of the present invention is to provide a deterioration / operation display device that can reliably display the deterioration and operation state of a protective element with a very simple configuration and can be manufactured at low cost.

上記課題を解決するため、請求項１に記載した発明は、保護素子の劣化または動作を視覚的に表示するようにした保護素子の劣化・動作表示装置において、
劣化または動作した前記保護素子が発生する熱が伝導される熱伝導体と、
この熱伝導体の熱により収縮、退避する熱収縮材と、
この熱収縮材の収縮、退避時に、窓部を介して外部から目視される表示材と、を備え、
この表示材により、前記保護素子の劣化または動作を表示するものである。 In order to solve the above problem, the invention described in claim 1 is a deterioration / operation display device for a protection element that visually displays deterioration or operation of the protection element.
A heat conductor through which heat generated by the deteriorated or operated protection element is conducted; and
A heat-shrinkable material that shrinks and retracts due to the heat of the heat conductor;
When the heat shrinkable material is shrunk and retracted, the display material is visually observed from the outside through the window portion, and
By this display material, the deterioration or operation of the protection element is displayed.

請求項２に記載した発明は、請求項１において、
平常時には、前記窓部を介して外部から前記熱収縮材が目視されるものである。 The invention described in claim 2 is the invention according to claim 1,
In normal times, the heat shrinkable material is visually observed from the outside through the window portion.

請求項３に記載した発明は、請求項２において、
外部から目視される前記熱収縮材及び前記表示材の表面を、異なる色でそれぞれ着色したものである。 The invention described in claim 3 is, in claim 2,
The heat-shrinkable material and the surface of the display material visually observed from the outside are colored with different colors.

本発明によれば、バリスタ、アレスタ等の保護素子の劣化や短絡破壊によってその温度が上昇すると、熱収縮材が収縮して退避し、窓部を介して表示材を外部から目視できるようになる。これにより、劣化または動作した保護素子や保安器を外部から容易に確認することが可能になる。
本発明では、従来技術のように漏洩電流の増加を電気的に検出する方法によらないので、複雑な電気回路も不要である。また、表示部を駆動するためのスプリング等も不要であり、構造上、極めて簡単であると共に、従来のハンダ付け作業における熟練も要求されないので、本発明が実装される保安器の小型化、低コスト化に寄与する等の利点がある。 According to the present invention, when the temperature rises due to deterioration or short-circuit breakdown of protective elements such as varistors and arresters, the heat-shrinkable material shrinks and retracts, and the display material can be visually observed from the outside through the window portion. . Thereby, it becomes possible to easily check the deteriorated or operated protection element or protector from the outside.
Since the present invention does not depend on a method of electrically detecting an increase in leakage current unlike the prior art, a complicated electric circuit is also unnecessary. In addition, a spring for driving the display unit is not necessary, and it is extremely simple in structure and does not require skill in conventional soldering work. There are advantages such as contributing to cost reduction.

以下、図に沿って本発明の実施形態を説明する。
図１は本発明の実施形態を示す構成図であり、１は平板状の金属からなる熱伝導板である。この熱伝導板１の上端部には、熱によって収縮する材料（例えば、難燃性ポリオレフィンや難燃性ポリ塩化ビニルなど）からなる環状の熱収縮材２が配置されている。後述するように、熱伝導板１は保護素子から発生した熱を下記の熱収縮材２に伝導させる作用を果たせば良いから、熱伝導体としては、板状材に限らず棒状材やブロック状材であっても良い。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing an embodiment of the present invention, and 1 is a heat conduction plate made of a flat metal. An annular heat-shrinkable material 2 made of a material that shrinks by heat (for example, flame-retardant polyolefin, flame-retardant polyvinyl chloride, etc.) is disposed at the upper end of the heat conducting plate 1. As will be described later, the heat conductive plate 1 only needs to perform the action of conducting heat generated from the protective element to the heat shrinkable material 2 described below. Therefore, the heat conductor is not limited to the plate-shaped material, but a rod-shaped material or a block-shaped material. It may be a material.

熱伝導板１の上部左側には、柵状の保持部１ａが形成され、また、上端部には一対のガイド部１ｂ，１ｃが形成されており、環状の熱収縮材２は、保持部１ａに千鳥状に掛け渡されてガイド部１ｂ，１ｃの間で二重になった状態で配置されている。図示されていないが、ガイド部１ｂ，１ｃの内部には、熱収縮材２を図示するような位置に案内して保持するためのリブ等が設けられている。   A fence-like holding portion 1a is formed on the upper left side of the heat conducting plate 1, and a pair of guide portions 1b and 1c are formed on the upper end portion. The annular heat shrinkable material 2 is formed of the holding portion 1a. Are arranged in a zigzag manner and doubled between the guide portions 1b and 1c. Although not shown, ribs or the like are provided inside the guide portions 1b and 1c for guiding and holding the heat-shrinkable material 2 to the positions shown in the drawing.

更に、ガイド部１ｂ，１ｃの相互間には窓部１ｄが形成されており、熱伝導板１の温度が低い平常時には、窓部１ｄ内に熱収縮材２が存在し、外部からは窓部１ｄを介して熱収縮材２の表面が目視されるようになっている。このとき、ガイド部１ｃの背後にある熱収縮材２の折り返し部分はフリーな状態（熱収縮材２の収縮によって自身が移動可能な状態）にある。   Further, a window portion 1d is formed between the guide portions 1b and 1c. When the temperature of the heat conducting plate 1 is low, the heat-shrinkable material 2 is present in the window portion 1d. The surface of the heat-shrinkable material 2 is visually observed through 1d. At this time, the folded-back portion of the heat-shrinkable material 2 behind the guide portion 1c is in a free state (the state in which the heat-shrinkable material 2 can move due to the shrinkage of the heat-shrinkable material 2).

一方、ガイド部１ｂ，１ｃより奥まった位置の熱伝導板１の表面には、一対の支持部１ｅ，１ｆが設けられており、これらの支持部１ｅ，１ｆの間には、前記窓部１ｄ側の表面が例えば赤色に着色された表示材３が張架されている。
上記のように構成することにより、熱伝導板１の温度が低い平常時には、外部から窓部１ｄを介して熱収縮材２の表面が目視され、熱伝導板１が加熱されてその温度が上昇した場合には、図２に示すように熱収縮材２が保持部１ａ方向に収縮して窓部１ｄから退避し、外部からは窓部１ｄを介して表示材３の表面が目視されるようになっている。
なお、平常時に窓部１ｄを介して目視される熱収縮材２の表面は、表示材３の表面とは異なる色、例えば白色に着色されている。 On the other hand, a pair of support portions 1e and 1f are provided on the surface of the heat conducting plate 1 at a position deeper than the guide portions 1b and 1c, and the window portion 1d is provided between the support portions 1e and 1f. The display material 3 whose side surface is colored in red, for example, is stretched.
By configuring as described above, during normal times when the temperature of the heat conducting plate 1 is low, the surface of the heat shrinkable material 2 is visually observed from the outside through the window portion 1d, and the temperature of the heat conducting plate 1 is heated to increase its temperature. In this case, as shown in FIG. 2, the heat-shrinkable material 2 shrinks in the direction of the holding portion 1a and retracts from the window portion 1d, so that the surface of the display material 3 can be visually observed from the outside through the window portion 1d. It has become.
Note that the surface of the heat-shrinkable material 2 viewed through the window portion 1d in a normal state is colored in a color different from the surface of the display material 3, for example, white.

次に、図３は本実施形態にかかる劣化・動作表示装置を保安器に実装した状態の内部構造を示している。実際には、図示されていないカバーがこの上に装着されて保安器の全体が構成されるものであり、カバーに別途形成される窓部を介して前記窓部１ｄを外部から目視可能となっている。
図３において、保安器２０は、絶縁材料からなるケーシング２５の内部にバリスタやアレスタ等の保護素子２１，２２を収納して構成されており、保護素子２１，２２の動作により雷サージを吸収して各種機器（図示せず）を保護するためのものである。 Next, FIG. 3 shows an internal structure in a state where the deterioration / operation display device according to the present embodiment is mounted on a protector. Actually, a cover (not shown) is mounted on this to constitute the entire protector, and the window portion 1d can be viewed from the outside through a window portion separately formed on the cover. ing.
In FIG. 3, the protector 20 is configured by housing protective elements 21 and 22 such as varistors and arresters in a casing 25 made of an insulating material, and absorbs lightning surges by the operation of the protective elements 21 and 22. This is for protecting various devices (not shown).

本実施形態にかかる劣化・動作表示装置１０は、上記保護素子２１，２２と共にケーシング２５の内部に実装され、例えば保護素子２１の側面に前記熱伝導板１の裏面が面接触して保護素子２１の熱が効率よく熱伝導板１に伝導されるように配置されている。なお、平常時には、保安器２０の外部から窓部１ｄを介して熱収縮材２の表面が目視される。   The deterioration / operation display device 10 according to the present embodiment is mounted inside the casing 25 together with the protection elements 21 and 22. For example, the back surface of the heat conducting plate 1 is in surface contact with the side surface of the protection element 21. The heat is efficiently conducted to the heat conducting plate 1. In normal times, the surface of the heat-shrinkable material 2 is visually observed from the outside of the protector 20 through the window portion 1d.

この状態で、雷などによる過電圧、過電流が保護素子２１に繰り返し作用し、漏洩電流の増加により特性が劣化したり、あるいは雷サージにより保護素子２１が動作して短絡破壊した場合、保護素子２１が加熱されてその温度が上昇する。
これにより、保護素子２１の温度は熱伝導板１を介して前述した熱収縮材２に伝導されるので、図２に示したように熱収縮材２が保持部１ａ方向に収縮して窓部１ｄから退避する。従って、外部からは窓部１ｄを介して表示材３の表面が目視されることとなり、保守、作業員は、保安器２０が劣化していること、または動作したことを一見して認識することができる。 In this state, when the overvoltage and overcurrent caused by lightning or the like repeatedly act on the protection element 21 and the characteristics deteriorate due to an increase in leakage current, or the protection element 21 operates due to a lightning surge and is short-circuited, the protection element 21 Is heated and its temperature rises.
As a result, the temperature of the protective element 21 is conducted to the heat shrinkable material 2 described above via the heat conducting plate 1, so that the heat shrinkable material 2 shrinks in the direction of the holding portion 1a as shown in FIG. Retreat from 1d. Therefore, the surface of the display material 3 is visually observed from the outside through the window portion 1d, and the maintenance and workers recognize at a glance that the protector 20 has deteriorated or has been operated. Can do.

なお、表示装置１０、保護素子２１，２２等の配置構造は図３の例に何ら限定されず、要は、劣化・動作表示の対象となる保護素子の熱が表示装置１０の熱伝導板１に効率よく伝導される配置構造であれば良い。
また、上記実施形態では、平常時に窓部１ｄを介して外部から熱収縮材２の表面が目視される構造としたが、熱収縮材２に別の遮蔽部材を連結しておき、平常時にはこの遮蔽部材により窓部１ｄを遮蔽し、熱収縮材２の収縮時に遮蔽部材を窓部１ｄから退避させて表示材３の表面を露出させるような構造にすることもできる。 The arrangement structure of the display device 10, the protection elements 21, 22, etc. is not limited to the example of FIG. 3. In short, the heat of the protection element that is the target of degradation / operation display is the heat conduction plate 1 of the display device 10. Any arrangement structure can be used as long as it is conducted efficiently.
Moreover, in the said embodiment, although it was set as the structure where the surface of the heat-shrink material 2 is visually observed from the exterior through the window part 1d in normal times, another shielding member is connected with the heat-shrink material 2, and this is normally used. The window portion 1d can be shielded by the shielding member, and when the heat-shrinkable material 2 contracts, the shielding member can be retracted from the window portion 1d to expose the surface of the display material 3.

本発明の実施形態を示す内部構成図である。It is an internal block diagram which shows embodiment of this invention. 本発明の実施形態の動作状態を示す内部構成図である。It is an internal block diagram which shows the operation state of embodiment of this invention. 本発明の実施形態の使用状態を示す内部構成図である。It is an internal block diagram which shows the use condition of embodiment of this invention.

符号の説明Explanation of symbols

１：熱伝導板（熱伝導体）
１ａ：保持部
１ｂ，１ｃ：ガイド部
１ｄ：窓部
１ｅ，１ｆ：支持部
２：熱収縮材
３：表示材
１０：劣化・動作表示装置
２０：保安器
２１，２２：保護素子
２５：ケーシング 1: Thermal conduction plate (thermal conductor)
DESCRIPTION OF SYMBOLS 1a: Holding | maintenance part 1b, 1c: Guide part 1d: Window part 1e, 1f: Support part 2: Heat-shrink material 3: Display material 10: Deterioration / operation | movement display apparatus 20: Protector 21, 22: Protection element 25: Casing

Claims (3)

保護素子の劣化または動作を視覚的に表示するようにした保護素子の劣化・動作表示装置において、
劣化または動作した前記保護素子が発生する熱が伝導される熱伝導体と、
この熱伝導体の熱により収縮、退避する熱収縮材と、
この熱収縮材の収縮、退避時に、窓部を介して外部から目視される表示材と、を備え、
この表示材により、前記保護素子の劣化または動作を表示することを特徴とする保護素子の劣化・動作表示装置。 In the protection element degradation / operation display device that visually displays the degradation or operation of the protection element,
A heat conductor through which heat generated by the deteriorated or operated protection element is conducted; and
A heat-shrinkable material that shrinks and retracts due to the heat of the heat conductor;
When the heat shrinkable material is shrunk and retracted, the display material is visually observed from the outside through the window portion, and
A display device for deterioration / operation of a protective element, which displays the deterioration or operation of the protective element by using the display material. 請求項１に記載した保護素子の劣化・動作表示装置において、
平常時には、前記窓部を介して外部から前記熱収縮材が目視されることを特徴とする保護素子の劣化・動作表示装置。 In the protection element degradation / operation display device according to claim 1,
The deterioration / operation display device for a protective element, wherein the heat-shrinkable material is visually observed from the outside through the window portion under normal conditions. 請求項２に記載した保護素子の劣化・動作表示装置において、
外部から目視される前記熱収縮材及び前記表示材の表面を、異なる色でそれぞれ着色したことを特徴とする保護素子の劣化・動作表示装置。 In the protection element degradation / operation display device according to claim 2,
A deterioration / operation display device for a protective element, wherein the heat-shrinkable material and the surface of the display material, which are visually observed from the outside, are colored with different colors.
JP2006066927A 2006-03-13 2006-03-13 Protection element deterioration / operation display device Expired - Lifetime JP4711339B2 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2325958A1 (en) 2009-11-24 2011-05-25 Sankosha Corporation Surge current detection device
CN102611074A (en) * 2011-01-25 2012-07-25 胜德国际研发股份有限公司 Thermal protection module
US8482277B2 (en) 2011-04-07 2013-07-09 Sankosha Corporation Surge current detection device

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JPS60140388A (en) * 1983-12-28 1985-07-25 三菱電機株式会社 Display processing method
JPS62229902A (en) * 1986-03-31 1987-10-08 富士電機株式会社 Gapless arrestor with abnormality detecting function
JPH0831299A (en) * 1994-07-20 1996-02-02 Daito Tsushinki Kk Surge absorber

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JPS60140388A (en) * 1983-12-28 1985-07-25 三菱電機株式会社 Display processing method
JPS62229902A (en) * 1986-03-31 1987-10-08 富士電機株式会社 Gapless arrestor with abnormality detecting function
JPH0831299A (en) * 1994-07-20 1996-02-02 Daito Tsushinki Kk Surge absorber

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2325958A1 (en) 2009-11-24 2011-05-25 Sankosha Corporation Surge current detection device
CN102072981A (en) * 2009-11-24 2011-05-25 株式会社山光社 Surge current detection device
US8410773B2 (en) 2009-11-24 2013-04-02 Sankosha Corporation Surge current detection device
CN102072981B (en) * 2009-11-24 2014-12-17 株式会社山光社 Surge current detection device
CN102611074A (en) * 2011-01-25 2012-07-25 胜德国际研发股份有限公司 Thermal protection module
CN102611074B (en) * 2011-01-25 2015-05-13 胜德国际研发股份有限公司 Thermal protection module
US8482277B2 (en) 2011-04-07 2013-07-09 Sankosha Corporation Surge current detection device

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