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JP2012022974A - Thermal overload relay - Google Patents

Thermal overload relay Download PDF

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Publication number
JP2012022974A
JP2012022974A JP2010161723A JP2010161723A JP2012022974A JP 2012022974 A JP2012022974 A JP 2012022974A JP 2010161723 A JP2010161723 A JP 2010161723A JP 2010161723 A JP2010161723 A JP 2010161723A JP 2012022974 A JP2012022974 A JP 2012022974A
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JP
Japan
Prior art keywords
adjustment dial
insertion hole
outer case
thermal overload
overload relay
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2010161723A
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Japanese (ja)
Inventor
Yukio Furuhata
幸生 古畑
Fumihiro Morishita
文浩 森下
Takeo Kamosaki
武雄 鴨崎
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Fuji Electric FA Components and Systems Co Ltd
Original Assignee
Fuji Electric FA Components and Systems Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Fuji Electric FA Components and Systems Co Ltd filed Critical Fuji Electric FA Components and Systems Co Ltd
Priority to JP2010161723A priority Critical patent/JP2012022974A/en
Priority to CN2011102061932A priority patent/CN102339688A/en
Publication of JP2012022974A publication Critical patent/JP2012022974A/en
Pending legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To provide a thermal overload relay capable of holding an adjusting dial at a fixed position, and obtaining stable action characteristics.SOLUTION: The thermal overload relay comprises a outer case 1, and an adjusting dial 12 inserted in an adjusting dial insertion hole 1a provided on the outer case 1 and adjusting a setting current. An engaging portion 12a provided on a peripheral surface of the adjusting dial 12 is pressed in a locking portion 1a of the adjusting dial insertion hole 1a provided on the outer case 1 to engage with each other. The adjusting dial 12 is composed of an upper surface portion 12b and a shaft portion 12c, and has a cam portion 12d at a lower end of the shaft portion 12c. On a peripheral surface of the shaft portion 12c, the engaging portion 12a to be pressed in the adjusting dial insertion hole 1a is provided. The adjusting dial insertion hole 1a is provided with a stepped portion 1e at a contact portion 1d of the adjusting dial insertion hole 1a so as to warp the upper surface portion 12b of the pressed-in adjusting dial 12, and a space is provided between the adjusting dial insertion hole 1a and the adjusting dial 12.

Description

本発明は、電磁接触器などに組み合わせて使用する熱動形過負荷継電器(サーマルリレー)に関し、詳しくは調整ダイヤルの保持構造に関する。   The present invention relates to a thermal overload relay (thermal relay) used in combination with an electromagnetic contactor or the like, and more particularly to a holding structure for an adjustment dial.

まず、頭記した熱動形過負荷継電器の代表的な従来構造を図5に示す。
図5において、1は樹脂モールド製の外郭ケース、2は主回路に接続したヒータ2aの発熱を受けて湾曲する主バイメタル、3は主バイメタル2の自由端に連係させたシフター、4はシフター3の変位に従動する釈放レバー、5は釈放レバー4で駆動される出力接点の開閉機構で、該開閉機構5は釈放レバー4に連係させた反転ばね6と、反転ばね6に連結したスライダ7と、スライダ7の動きに応動して開閉動作する出力接点8(a接点)および9(b接点)と、リセットスイッチ10との組立体からなる。また、11は前記釈放レバー4を揺動可能に軸支保持した調整リンク、12は調整リンク11の上端側に連係させて整定電流を調整する調整ダイヤルである。
First, FIG. 5 shows a typical conventional structure of the thermal overload relay described above.
In FIG. 5, 1 is an outer case made of a resin mold, 2 is a main bimetal that is bent by the heat generated by the heater 2a connected to the main circuit, 3 is a shifter linked to the free end of the main bimetal 2, and 4 is a shifter 3 The release lever 5 is driven by the release lever 4, and is an opening / closing mechanism for the output contact. The opening / closing mechanism 5 includes a reversing spring 6 linked to the releasing lever 4, and a slider 7 connected to the reversing spring 6. The output contacts 8 (a contact) and 9 (b contact) that open and close in response to the movement of the slider 7 and the reset switch 10 are assembled. Reference numeral 11 denotes an adjustment link that pivotally holds the release lever 4 so that it can swing. Reference numeral 12 denotes an adjustment dial that links the upper end side of the adjustment link 11 to adjust the settling current.

上記熱動形過負荷継電器の動作は周知の通りであり、主回路に流れる過負荷電流により主バイメタル2が湾曲すると、シフター3を介して釈放レバー4が支軸11bを中心に回転して反転ばね6を反転させ、開閉機構5のスライダ7を駆動して出力接点8,9を反転させて接点信号を出力する(例えば、特許文献1参照)。   The operation of the thermal overload relay is well known, and when the main bimetal 2 bends due to the overload current flowing in the main circuit, the release lever 4 rotates around the support shaft 11b via the shifter 3 and reverses. The spring 6 is reversed, the slider 7 of the opening / closing mechanism 5 is driven, the output contacts 8 and 9 are reversed, and a contact signal is output (for example, see Patent Document 1).

次に、熱動形過負荷継電器の整定電流値の調整方法を説明する。図5において、調整ダイヤル12を回すと、カム部12cに当接している調整リンク11が外郭ケース1のケース支軸1bを支点として変位する。これに伴って調整リンク11に連結された釈放レバー4も変位して移動し、釈放レバー4とシフター3の先端との間のギャップを変化させることができる。   Next, a method for adjusting the settling current value of the thermal overload relay will be described. In FIG. 5, when the adjustment dial 12 is turned, the adjustment link 11 in contact with the cam portion 12 c is displaced using the case support shaft 1 b of the outer case 1 as a fulcrum. Along with this, the release lever 4 connected to the adjustment link 11 is also displaced and moved, and the gap between the release lever 4 and the tip of the shifter 3 can be changed.

ここで、調整ダイヤル12の外郭ケース1への組立方法を図6に基づいて説明する。図6において、調整ダイヤル12を所定の組立位置に保持させるために、外郭ケース1に設けた調整ダイヤル挿入穴1aへ調整ダイヤル12の周面に設けた係合部12aを圧入させるようにして調整ダイヤル挿入穴1aへと挿入するようにしている。その際、調整ダイヤル12の上面部12bから調整ダイヤルの周面に設けた係合部12aの上端までの高さ寸法bは、外郭ケース1の上端から調整ダイヤル挿入穴1aの調整ダイヤル12が係止される係止部1cの下端までの高さ寸法aよりも長く設定されている。   Here, a method of assembling the adjustment dial 12 to the outer case 1 will be described with reference to FIG. In FIG. 6, in order to hold the adjustment dial 12 at a predetermined assembly position, the adjustment portion 12 a provided on the peripheral surface of the adjustment dial 12 is press-fitted into the adjustment dial insertion hole 1 a provided in the outer case 1. It is inserted into the dial insertion hole 1a. At that time, the height dimension b from the upper surface portion 12b of the adjustment dial 12 to the upper end of the engaging portion 12a provided on the peripheral surface of the adjustment dial is related to the adjustment dial 12 of the adjustment dial insertion hole 1a from the upper end of the outer case 1. It is set longer than the height dimension a up to the lower end of the locking portion 1c to be stopped.

特開2001−160346号JP 2001-160346 A

ところで、前記した従来の熱動形過負荷継電器では、図7に示すように、調整ダイヤル12を外郭ケース1の調整ダイヤル挿入穴1aへ圧入すると、イのようなガタが発生してしまう。またロの方向にもガタが発生し、調整ダイヤル12が定位置に保持されず、動作特性にバラツキが発生してしまう。   By the way, in the above-described conventional thermal overload relay, when the adjustment dial 12 is press-fitted into the adjustment dial insertion hole 1a of the outer case 1, as shown in FIG. Further, rattling occurs also in the direction of (R), and the adjustment dial 12 is not held in a fixed position, resulting in variations in operating characteristics.

本発明は上記の点に鑑みなされたものであり、調整ダイヤルを定位置に保持し、安定した動作特性を得ることができる熱動形過負荷継電器を提供することを目的とする。   The present invention has been made in view of the above points, and an object of the present invention is to provide a thermal overload relay capable of holding an adjustment dial in a fixed position and obtaining stable operating characteristics.

上記目的を達成するための、本発明によれば、外郭ケースと、外郭ケースに設けられた調整ダイヤル挿入穴に挿入され整定電流の調整をする調整ダイヤルとを備え、前記調整ダイヤルの周面に設けた係合部を前記外郭ケースに設けられた係止部へ圧入して係合させるようにした熱動形過負荷継電器において、前記調整ダイヤルは、上面部と軸部とからなり軸部の下端にはカム部を有しており、前記軸部の周面には前記調整ダイヤル挿入穴へ圧入させるための係合部とを備え、前記調整ダイヤル挿入穴は圧入された調整ダイヤルの上面部を撓ませるために、前記調整ダイヤル挿入穴の接触部に段差を設け、調整ダイヤル挿入穴と調整ダイヤルとの間に空間を設けた構造とする(請求項1)。また、上記の熱動形過負荷継電器において、次記のような具体的態様で構成することができる。
(1)前記調整ダイヤルの上面部から調整ダイヤルの周面に設けた係合部の上端までの高さ寸法は、外郭ケースの上端から調整ダイヤル挿入穴の調整ダイヤルが係止される係止部の下端までの高さ寸法よりも短く設定する(請求項2)。
(2)前記調整ダイヤルの周面に設けた係合部の下端形状をテーパ形状とする(請求項3)。
In order to achieve the above object, according to the present invention, an outer case and an adjustment dial that is inserted into an adjustment dial insertion hole provided in the outer case and adjusts a settling current are provided on the peripheral surface of the adjustment dial. In the thermal overload relay in which the engagement portion provided is press-fitted into the engagement portion provided in the outer case and engaged, the adjustment dial includes an upper surface portion and a shaft portion, The lower end has a cam portion, and the peripheral surface of the shaft portion is provided with an engaging portion for press-fitting into the adjustment dial insertion hole, and the adjustment dial insertion hole is an upper surface portion of the press-fitted adjustment dial Therefore, the contact portion of the adjustment dial insertion hole is provided with a step, and a space is provided between the adjustment dial insertion hole and the adjustment dial. Further, the above-described thermal overload relay can be configured in a specific manner as described below.
(1) The height dimension from the upper surface of the adjustment dial to the upper end of the engagement portion provided on the peripheral surface of the adjustment dial is a locking portion where the adjustment dial of the adjustment dial insertion hole is locked from the upper end of the outer case. It is set to be shorter than the height dimension to the lower end of the above (claim 2).
(2) The lower end shape of the engaging portion provided on the peripheral surface of the adjustment dial is tapered.

上記の構成によれば、調整ダイヤルの上面部を撓ませて押圧保持することにより、調整ダイヤルの軸方向と、軸方向に対しての水平方向のガタも無くすことができ、部品点数を増やすことなく、調整ダイヤルを定位置に保持することで、安定した動作特性を得ることが可能となる。 According to the above configuration, by bending and holding the upper surface of the adjustment dial, the axial direction of the adjustment dial and horizontal play relative to the axial direction can be eliminated, and the number of parts can be increased. Instead, by holding the adjustment dial in a fixed position, it is possible to obtain stable operating characteristics.

本発明の調整ダイヤルの拡大図Enlarged view of the adjustment dial of the present invention 本発明の実施例を示す熱動形過負荷継電器の斜視図The perspective view of the thermal overload relay which shows the Example of this invention 図2に示すA−A断面の拡大斜視図The expanded perspective view of the AA cross section shown in FIG. 図3に示すB部の拡大図Enlarged view of part B shown in FIG. 従来例を示す熱動形過負荷継電器の内部構造の正面図Front view of internal structure of thermal overload relay showing conventional example 従来の調整ダイヤルの拡大図Enlarged view of conventional adjustment dial 図6に示すC部の拡大図Enlarged view of part C shown in FIG.

以下、本発明を実施するための形態を図1〜4に示す実施例に基づいて説明する。
図1は本発明の熱動形過負荷継電器の調整ダイヤルを示した拡大図、図2は本発明の実施例を示した熱動形過負荷継電器の内部構造の斜視図、図3は図2に示したA−A断面の拡大斜視図、図4は図3に示したB部の拡大図である。
Hereinafter, the form for implementing this invention is demonstrated based on the Example shown in FIGS.
FIG. 1 is an enlarged view showing an adjustment dial of a thermal overload relay of the present invention, FIG. 2 is a perspective view of the internal structure of the thermal overload relay showing an embodiment of the present invention, and FIG. FIG. 4 is an enlarged perspective view of a section B shown in FIG. 3.

すなわち、図1に示す実施例において、調整ダイヤル12の軸部12cの周面上には周面から突出するように突起からなる係合部12aが設けられており、外郭ケース1の調整ダイヤル挿入穴1aの下端部には、調整ダイヤルの軸部12cの周面上に設けた係合部12aを圧入保持される係止部1cを設けている。   That is, in the embodiment shown in FIG. 1, an engagement portion 12 a made of a protrusion is provided on the peripheral surface of the shaft portion 12 c of the adjustment dial 12 so as to protrude from the peripheral surface, and the adjustment dial is inserted into the outer case 1. At the lower end of the hole 1a, there is provided a locking portion 1c for press-fitting and holding the engaging portion 12a provided on the peripheral surface of the shaft portion 12c of the adjustment dial.

図1に示すように、調整ダイヤル12を外郭ケース1の調整ダイヤル挿入穴1aへ圧入することにより、調整ダイヤル12の軸部12cの周面上に設けた係合部12aが調整ダイヤル挿入穴1aの係止部1cで保持されることで調整ダイヤル12が調整ダイヤル挿入穴1aからの抜け止めとすることができる。また、調整ダイヤル12を調整ダイヤル挿入穴1aの係止部1cへ圧入する際、圧入が容易にできるように、調整ダイヤル12の軸部12cの周面に設けた係合部12aの下端側形状をテーパ形状にする。
圧入された調整ダイヤル12の上面部12bは、外郭ケース1の接触部1dと接触し、外郭ケース1の調整ダイヤル挿入穴1aの接触部1dに段差1eを設けたことで、図1に示したFのように調整ダイヤル12の上面部12bが撓むように保持される。
この時、調整ダイヤル12の上面部12bから調整ダイヤル12の軸部12cの周面に設けた係合部12aの上端までの高さ寸法bは、外郭ケース1の上端から調整ダイヤル挿入穴1aの調整ダイヤル12が係止される係止部1cの下端までの高さ寸法aよりも短く設定することによって、調整ダイヤル12の上面部12bが撓ませることができる。
また、調整ダイヤル12の上面部12bの撓みをより大きくする場合には、調整ダイヤル12の軸部12cに溝部12eを設けても良い。
これによって、圧入保持された調整ダイヤル12の軸部12cの周面に設けた係合部12aと、調整ダイヤル12の上面部12bが外郭ケース1の接触部1dで接触保持されることで、外郭ケース1と調整ダイヤル12のガタが無くなり、安定した動作特性を得ることが可能となる。
As shown in FIG. 1, when the adjustment dial 12 is press-fitted into the adjustment dial insertion hole 1a of the outer case 1, the engagement portion 12a provided on the peripheral surface of the shaft portion 12c of the adjustment dial 12 is moved to the adjustment dial insertion hole 1a. The adjustment dial 12 can be retained from the adjustment dial insertion hole 1a by being held by the locking portion 1c. In addition, when the adjustment dial 12 is press-fitted into the locking portion 1c of the adjustment dial insertion hole 1a, the shape of the lower end side of the engagement portion 12a provided on the peripheral surface of the shaft portion 12c of the adjustment dial 12 so as to facilitate the press-fitting. Is tapered.
The upper surface portion 12b of the press-fitted adjustment dial 12 is in contact with the contact portion 1d of the outer case 1, and a step 1e is provided in the contact portion 1d of the adjustment dial insertion hole 1a of the outer case 1, as shown in FIG. Like F, the upper surface portion 12b of the adjustment dial 12 is held so as to be bent.
At this time, the height dimension b from the upper surface portion 12b of the adjustment dial 12 to the upper end of the engaging portion 12a provided on the peripheral surface of the shaft portion 12c of the adjustment dial 12 is from the upper end of the outer case 1 to the adjustment dial insertion hole 1a. By setting shorter than the height dimension a up to the lower end of the locking portion 1c to which the adjustment dial 12 is locked, the upper surface portion 12b of the adjustment dial 12 can be bent.
Further, when the deflection of the upper surface portion 12 b of the adjustment dial 12 is further increased, the groove portion 12 e may be provided in the shaft portion 12 c of the adjustment dial 12.
As a result, the engagement portion 12a provided on the peripheral surface of the shaft portion 12c of the adjustment dial 12 that is press-fitted and held and the upper surface portion 12b of the adjustment dial 12 are held in contact by the contact portion 1d of the outer case 1, thereby The backlash between the case 1 and the adjustment dial 12 is eliminated, and stable operating characteristics can be obtained.

1 外郭ケース
1a 調整ダイヤル挿入穴
1b ケース支軸
1c 係止部
1d 接触部
1e 段差
2 主バイメタル
3 シフター
4 釈放レバー
4a 補償バイメタル
5 接点開閉機構
6 反転ばね
7 スライダ
8 ,9 出力接点
10 リセットスイッチ
11 調整リンク
12 調整ダイヤル
12a 係合部
12b 上面部
12c 軸部
12d カム部
12e 溝部
DESCRIPTION OF SYMBOLS 1 Outer case 1a Adjustment dial insertion hole 1b Case spindle 1c Locking part 1d Contact part 1e Step 2 Main bimetal 3 Shifter 4 Release lever 4a Compensation bimetal 5 Contact opening / closing mechanism 6 Reversing spring 7 Slider 8, 9 Output contact 10 Reset switch 11 Adjustment link 12 Adjustment dial 12a Engagement portion 12b Upper surface portion 12c Shaft portion 12d Cam portion 12e Groove portion

Claims (3)

外郭ケースと、外郭ケースに設けられた調整ダイヤル挿入穴に挿入され整定電流の調整をする調整ダイヤルとを備え、前記調整ダイヤルの周面に設けた係合部を前記外郭ケースに設けられた調整ダイヤル挿入穴の係止部へ圧入して係合させるようにした熱動形過負荷継電器において、前記調整ダイヤルは、上面部と軸部とからなり軸部の下端にはカム部を有しており、前記軸部の周面には前記調整ダイヤル挿入穴へ圧入させるための係合部とを備え、前記調整ダイヤル挿入穴は圧入された調整ダイヤルの上面部を撓ませるために、前記調整ダイヤル挿入穴の接触部に段差を設け、調整ダイヤル挿入穴と調整ダイヤルとの間に空間を設けたことを特徴とする熱動形過負荷継電器。   An adjustment case provided in the outer case, and an adjustment dial that is inserted into an adjustment dial insertion hole provided in the outer case and adjusts a settling current, and an engagement portion provided in a peripheral surface of the adjustment dial is provided in the outer case In the thermal overload relay that is press-fitted into and engaged with the locking portion of the dial insertion hole, the adjustment dial includes an upper surface portion and a shaft portion, and has a cam portion at the lower end of the shaft portion. And an engagement portion for press-fitting into the adjustment dial insertion hole on the peripheral surface of the shaft portion, and the adjustment dial insertion hole is configured to flex the upper surface portion of the press-fitted adjustment dial. A thermal overload relay, characterized in that a step is provided at the contact portion of the insertion hole, and a space is provided between the adjustment dial insertion hole and the adjustment dial. 請求項1に記載の熱動形過負荷継電器において、調整ダイヤルの上面部から調整ダイヤルの周面に設けた係合部の上端までの高さ寸法は、外郭ケースの上端から調整ダイヤル挿入穴の調整ダイヤルが係止される係止部の下端までの高さ寸法よりも短く設定したことを特徴とする熱動形過負荷継電器。   The thermal overload relay according to claim 1, wherein the height dimension from the upper surface of the adjustment dial to the upper end of the engagement portion provided on the peripheral surface of the adjustment dial is from the upper end of the outer case to the adjustment dial insertion hole. A thermal overload relay, characterized in that it is set shorter than the height dimension to the lower end of the locking portion where the adjustment dial is locked. 請求項1に記載の熱動形過負荷継電器において、調整ダイヤルの周面に設けた係合部の下端形状をテーパ形状としたことを特徴とする熱動形過負荷継電器。
2. The thermal overload relay according to claim 1, wherein a lower end shape of an engaging portion provided on a peripheral surface of the adjustment dial is tapered.
JP2010161723A 2010-07-16 2010-07-16 Thermal overload relay Pending JP2012022974A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2010161723A JP2012022974A (en) 2010-07-16 2010-07-16 Thermal overload relay
CN2011102061932A CN102339688A (en) 2010-07-16 2011-07-15 Thermal type overload relay

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2010161723A JP2012022974A (en) 2010-07-16 2010-07-16 Thermal overload relay

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Publication Number Publication Date
JP2012022974A true JP2012022974A (en) 2012-02-02

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Application Number Title Priority Date Filing Date
JP2010161723A Pending JP2012022974A (en) 2010-07-16 2010-07-16 Thermal overload relay

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CN (1) CN102339688A (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07254342A (en) * 1994-03-15 1995-10-03 Fuji Electric Co Ltd Thermal overload relay
JP2009224311A (en) * 2008-02-19 2009-10-01 Fuji Electric Fa Components & Systems Co Ltd Thermal overload relay

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