JPS63224125A - Overload protector - Google Patents
Overload protectorInfo
- Publication number
- JPS63224125A JPS63224125A JP5656687A JP5656687A JPS63224125A JP S63224125 A JPS63224125 A JP S63224125A JP 5656687 A JP5656687 A JP 5656687A JP 5656687 A JP5656687 A JP 5656687A JP S63224125 A JPS63224125 A JP S63224125A
- Authority
- JP
- Japan
- Prior art keywords
- bimetal
- protection device
- overload protection
- temperature
- fixed
- 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.)
- Granted
Links
- 230000001012 protector Effects 0.000 title 1
- 230000001681 protective effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、過負荷保護装置、特にバイメタルを用いた過
負荷保護装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an overload protection device, and particularly to an overload protection device using bimetal.
従来の過負荷保護装置を第４図に示す。 A conventional overload protection device is shown in FIG.
第４図は過負荷保護装置の縦断面図である。FIG. 4 is a longitudinal sectional view of the overload protection device.
図において、Ａは過負荷保護装置である。この過負荷保
護装置Ａは不飽和ポリエステル等の耐熱絶縁材から成る
円筒状のケース１と蓋２で囲んだ空間に、可動接点３．
４を固着した皿状のバイメタル５を、ケース１の底面１
ａに貫通固定した軸６によ・り反転自在に軸支すること
によって構成されている。上記可動接点３，４と対向す
る位置に固定接点７．８を固着した固定端子９．１０を
ケース１の底面１ａに貫通固定したものとなっていた。In the figure, A is an overload protection device. This overload protection device A has movable contacts 3.
A plate-shaped bimetal 5 to which 4 is fixed is attached to the bottom surface 1 of the case 1.
It is constructed by being rotatably supported by a shaft 6 which is fixed through the shaft a. A fixed terminal 9.10 having a fixed contact 7.8 fixed to a position facing the movable contacts 3 and 4 was fixed through the bottom surface 1a of the case 1.
かかる過負荷保護装置の電気回路を第５図にて説明する
。第５図は従来の過負荷保護装置の電気回路図である。The electric circuit of such an overload protection device will be explained with reference to FIG. FIG. 5 is an electrical circuit diagram of a conventional overload protection device.
図において、電動機Ｂの主巻線１１と始動装置Ｃを直列
に接続した始動巻線１２の並列回路に、直列に接続して
用いられる。In the figure, the main winding 11 of a motor B and a starter C are connected in series to a parallel circuit of a starting winding 12, which is connected in series.
電動機Ｂに何等かの異常が発生して大きな電流が流れる
と、バイメタル５の自己発熱量が増加する０発熱によっ
てバイメタル５が開路動作温度に達すると、バイメタル
５が開路動作すると同時に可動接点３．４が固定接点７
．８から離れ、電動機Ｂへの通電を断つ。When some kind of abnormality occurs in the motor B and a large current flows, the self-heating amount of the bimetal 5 increases.When the bimetal 5 reaches the opening operation temperature due to zero heat generation, the bimetal 5 operates to open the circuit and at the same time, the movable contact 3. 4 is fixed contact 7
．． 8 and cut off the power to motor B.
この後、バイメタル５が冷却され、閉路反転復帰温度に
達すると、開路動作とは逆の閉路動作を行ない元の位置
に復帰し、゛可動接点３．４が固定接点７，８と接触し
、電動機Ｂが再び通電される尚、この過負荷保護装置に
関連するものとして例えば実開昭６０−１８３３４９号
、実開昭５９−７２６４１号公報があげられる。Thereafter, when the bimetal 5 is cooled and reaches the closing reversal return temperature, it performs a closing operation that is the opposite of the opening operation and returns to its original position, and the movable contacts 3.4 come into contact with the fixed contacts 7 and 8. Electric motor B is energized again.As related to this overload protection device, for example, Japanese Utility Model Application No. 60-183349 and Japanese Utility Model Application No. 59-72641 can be mentioned.
上記従来技術は、バイメタルが閉路、開路動作を繰り返
すため、バイメタルが疲労破断して可動接点と固定接点
とが溶着してしまうとバイメタル自身の温度がケースお
よび蓋の耐熱温度約２６０℃以上に上昇し、ケースや蓋
が焼損する可能性があった。In the above conventional technology, the bimetal repeatedly closes and opens the circuit, so if the bimetal breaks due to fatigue and the movable contact and fixed contact are welded, the temperature of the bimetal itself will rise to the heat resistance temperature of the case and lid, which is approximately 260°C or higher. However, there was a possibility that the case and lid could be burnt out.
本発明の目的は、バイメタルが疲労破断して接点が溶着
しても、回路を完全に遮断することができる過負荷保護
装置を提供することにある。An object of the present invention is to provide an overload protection device that can completely interrupt a circuit even if the bimetal is fatigue-broken and the contacts are welded.
上記目的は、ケース内に第１のバイメタルと第２のバイ
メタルを接続して設けるとともに、上記第２のバイメタ
ルは上記第１のバイメタルの動作温度より高いことによ
り達成される。The above object is achieved by providing a first bimetal and a second bimetal connected to each other in the case, and by having the second bimetal have a higher operating temperature than the first bimetal.
第２のバイメタルは第１のバイメタルより動作温度が高
いので、第１のバイメタルが加熱され、動作温度以上に
なると第２のバイメタルが動作し第１のバイメタルの温
度上昇を防止できる。Since the second bimetal has a higher operating temperature than the first bimetal, when the first bimetal is heated and the temperature rises above the operating temperature, the second bimetal operates and can prevent the temperature of the first bimetal from rising.
以下、本発明の一実施例を第１図、第２図、第３図によ
り説明する。An embodiment of the present invention will be described below with reference to FIGS. 1, 2, and 3.
第１図は本発明の過負荷保護装置の縦断面図、第２図は
第１図のＩ−Ｉ断面図、第３図は本発明に係る過負荷保
護装置の電気回路図である。FIG. 1 is a longitudinal cross-sectional view of the overload protection device of the present invention, FIG. 2 is a cross-sectional view taken along line II in FIG. 1, and FIG. 3 is an electric circuit diagram of the overload protection device according to the present invention.
第４図、第５図と同一符号は同一物、又は均等物を示す
ので説明を省略する。固定端子９に第２の固定接点１３
を設け、該固定接点１３と対向する位置筒２のバイメタ
ル１４を設ける。第２のバイメタル１４には上記固定接
点１３と接触する可動接点１５を配置すると共に、上記
第２のバイメタル１４の他端をケース１の底面１ａに貫
通固定した第１のバイメタル５用の端子１６に固着され
、ている、上記第２のバイメタル１４は第１のバイメタ
ル５の動作温度約２５０℃以上に設定されている。した
がって、約２５０℃以上で反転動作した第２のバイメタ
ル１４は復帰しない。The same reference numerals as in FIGS. 4 and 5 indicate the same or equivalent components, and therefore the description thereof will be omitted. A second fixed contact 13 is connected to the fixed terminal 9.
, and a bimetal 14 of the cylinder 2 facing the fixed contact 13 is provided. A movable contact 15 that contacts the fixed contact 13 is disposed on the second bimetal 14, and a terminal 16 for the first bimetal 5 has the other end of the second bimetal 14 penetrated and fixed to the bottom surface 1a of the case 1. The operating temperature of the second bimetal 14, which is fixedly attached to the second bimetal 14, is set to be higher than the operating temperature of the first bimetal 5, which is about 250°C. Therefore, the second bimetal 14 which has been inverted at a temperature of about 250° C. or higher does not recover.
かかる構成の過負荷保護装置りは、第３図に示す如く電
動機Ｂと第１のバイメタル５および第２のバイメタル１
４が直列に接続されて用いられる電動機Ｂに何等かの異
常が発生して大きな電流が流れると、第１のバイメタル
５および第２のバイメタル１４が共に自己発熱するが１
反転動作温度の低い第１のバイメタル５が開路動作する
と同時に第１のバイメタル５に取付けられた可動接点３
．４が固定接点７，８から離れ、電動機Ｂの通電が断た
れる。As shown in FIG.
4 are connected in series and a large current flows through the motor B, the first bimetal 5 and the second bimetal 14 both self-heat.
The movable contact 3 attached to the first bimetal 5 at the same time as the first bimetal 5 with a low reversal operation temperature operates to open the circuit.
．． 4 separates from the fixed contacts 7 and 8, and the current to the motor B is cut off.
この後、バイメタル５が冷却され開路動作温度に達する
と、開路動作とは逆の閉路動作を行ない元の位置に復帰
する。同時に可動接点３，４が固定接点７．８と接触し
、電動機Ｂが再び通電される。Thereafter, when the bimetal 5 is cooled and reaches the circuit-opening temperature, it performs a circuit-closing operation, which is the opposite of the circuit-opening operation, and returns to its original position. At the same time, the movable contacts 3, 4 come into contact with the fixed contacts 7.8 and the motor B is energized again.
この様に第１のバイメタル５が開路動作、閉路動作を繰
返し行なわれ第１のバイメタル５の疲労から可動接点３
．４と固定接点７．８が溶着すると、第１のバイメタル
５および第２のバイメタル１４の通電時間が長くなる。In this way, the first bimetal 5 repeatedly performs the opening and closing operations, and due to fatigue of the first bimetal 5, the movable contact 3
．． 4 and the fixed contact 7.8 are welded together, the energization time of the first bimetal 5 and the second bimetal 14 becomes longer.
その結果、第１のバイメタル５と第２のバイメタル１４
が発熱しケース１内の温度を上昇させつつ第２のバイメ
タル１４の温度も高くなる。第２のバイメタル１４が動
作温度約２５０℃に到達すると第２のバイメタル１４が
開路動作を行なうと同時に可動接点１５が固定接点１３
から離れ、電動機Ｂの通電が断たれる。As a result, the first bimetal 5 and the second bimetal 14
generates heat, raising the temperature inside the case 1 and increasing the temperature of the second bimetal 14 as well. When the second bimetal 14 reaches an operating temperature of approximately 250°C, the second bimetal 14 performs an opening operation and at the same time, the movable contact 15 connects to the fixed contact 13.
, and the power to motor B is cut off.
この状態から第２のバイメタル１４は冷却を開始するが
、この時冷却されて閉路動作に入る最低温度を約−２０
℃以下に第２のバイメタル１４の閉路動作温度を設定し
ておけば、電動機Ｂは再び通電されることがない。The second bimetal 14 starts cooling from this state, but at this time the lowest temperature at which it cools and enters a closed circuit operation is approximately -20°C.
If the circuit-closing operation temperature of the second bimetal 14 is set below .degree. C., the motor B will not be energized again.
従って１本実施例によれば電動機Ｂが連続通電されて焼
損に至ることもなければ、過負荷保護装置りもバイメタ
ル５、バイメタル１４の連続通電による発熱で高温にな
ることがないので、ケース１を焼損させることもない。Therefore, according to this embodiment, the motor B will not be burnt out due to continuous energization, and the overload protection device will not become high temperature due to heat generation due to continuous energization of bimetal 5 and bimetal 14. It will not burn out.
また、従来の構造を大きく変えることなく簡単かつ、安
価に安全性の高い過負荷保護装置が提供出来る。Moreover, a highly safe overload protection device can be provided simply, inexpensively, and without significantly changing the conventional structure.
本発明によれば、第１のバイメタルが疲労して接点溶着
が発生しても、第２のバイメタルが回路を遮断するので
、過負荷保護装置の焼損を防止出来る効果がある。According to the present invention, even if the first bimetal fatigues and contact welding occurs, the second bimetal interrupts the circuit, so there is an effect of preventing burnout of the overload protection device.
第１図は本発明の過負荷保護装置の縦断面図。
第２図は、第１図のＩ−Ｉ断面図、第３図は本発明の過
負荷保護装置の電気回路図、第４図は従来の過負荷保護
装置の縦断面図、第５図は従来の過負荷保護装置の電気
回路図である。
１・・・ケース、２・・・蓋、３．４・・・可動接点、
５・・・バイメタル、６・・・軸、７．８・・・固定接
点、９．１０・・・固定端子、１３・・・固定接点、１
４・・・バイメタル、１５・・・可動接点、１６・・・
バイメタル端子。
Ｖ １ ｍ
茎 ２ｆｌ
Ｔ−３口FIG. 1 is a longitudinal sectional view of the overload protection device of the present invention. Fig. 2 is a sectional view taken along line II in Fig. 1, Fig. 3 is an electric circuit diagram of the overload protection device of the present invention, Fig. 4 is a vertical sectional view of a conventional overload protection device, and Fig. 5 is a sectional view of the overload protection device of the present invention. FIG. 1 is an electrical circuit diagram of a conventional overload protection device. 1... Case, 2... Lid, 3.4... Movable contact,
5... Bimetal, 6... Shaft, 7.8... Fixed contact, 9.10... Fixed terminal, 13... Fixed contact, 1
4... Bimetal, 15... Movable contact, 16...
Bimetal terminal. V 1m stem 2fl T-3 mouth
Claims (1)
接続して設けるとともに、上記第２のバイメタルは上記
第１のバイメタルの動作温度より高いことを特徴とする
過負荷保護装置。 ２、上記第１のバイメタルと第２のバイメタルは直列に
接続されることを特徴とする特許請求の範囲第１項記載
の過負荷保護装置。[Claims] 1. An overload characterized in that a first bimetal and a second bimetal are connected and provided in a case, and the second bimetal has a higher operating temperature than the first bimetal. Protective device. 2. The overload protection device according to claim 1, wherein the first bimetal and the second bimetal are connected in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62056566A JP2641440B2 (en) | 1987-03-13 | 1987-03-13 | Overload protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62056566A JP2641440B2 (en) | 1987-03-13 | 1987-03-13 | Overload protection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63224125A true JPS63224125A (en) | 1988-09-19 |
| JP2641440B2 JP2641440B2 (en) | 1997-08-13 |
Family
ID=13030684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62056566A Expired - Fee Related JP2641440B2 (en) | 1987-03-13 | 1987-03-13 | Overload protection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2641440B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010050041A (en) * | 2008-08-25 | 2010-03-04 | Sanyo Electric Co Ltd | Overcurrent protective device |
| JP2010051156A (en) * | 2008-08-25 | 2010-03-04 | Sanyo Electric Co Ltd | Overcurrent protection apparatus |
| JP2010129351A (en) * | 2008-11-27 | 2010-06-10 | Sanyo Electric Co Ltd | Overcurrent protective device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5088568A (en) * | 1973-12-10 | 1975-07-16 | ||
| JPS5226174U (en) * | 1975-08-15 | 1977-02-23 | ||
| JPS57162230A (en) * | 1981-03-27 | 1982-10-06 | Matsushita Electric Works Ltd | Thermal protector |
| JPS5972641U (en) * | 1982-11-09 | 1984-05-17 | 株式会社東芝 | Compressor overload protection device |
| JPS60183349U (en) * | 1984-05-11 | 1985-12-05 | 三菱電機株式会社 | Bimetal support device for thermal protector |
-
1987
- 1987-03-13 JP JP62056566A patent/JP2641440B2/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5088568A (en) * | 1973-12-10 | 1975-07-16 | ||
| JPS5226174U (en) * | 1975-08-15 | 1977-02-23 | ||
| JPS57162230A (en) * | 1981-03-27 | 1982-10-06 | Matsushita Electric Works Ltd | Thermal protector |
| JPS5972641U (en) * | 1982-11-09 | 1984-05-17 | 株式会社東芝 | Compressor overload protection device |
| JPS60183349U (en) * | 1984-05-11 | 1985-12-05 | 三菱電機株式会社 | Bimetal support device for thermal protector |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010050041A (en) * | 2008-08-25 | 2010-03-04 | Sanyo Electric Co Ltd | Overcurrent protective device |
| JP2010051156A (en) * | 2008-08-25 | 2010-03-04 | Sanyo Electric Co Ltd | Overcurrent protection apparatus |
| JP2010129351A (en) * | 2008-11-27 | 2010-06-10 | Sanyo Electric Co Ltd | Overcurrent protective device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2641440B2 (en) | 1997-08-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5342641B2 (en) | Thermal switch | |
| KR100603222B1 (en) | Motor protector apparatus | |
| US3562587A (en) | Overheating control device for alternating current motor | |
| US20020153991A1 (en) | Overload protection unit | |
| FR2403671A1 (en) | PROTECTION DEVICE FOR ELECTRIC MOTORS, ESPECIALLY FOR SMALL MOTORS | |
| US20140104730A1 (en) | Motor protector | |
| JPS63224125A (en) | Overload protector | |
| JPS60232630A (en) | Bimetal protection switch | |
| US4092624A (en) | Thermostat assembly | |
| JPH0731051A (en) | Overcurrent protector having excessive temperature rise preventive function | |
| US3209206A (en) | Overtemperature protected apparatus | |
| DK159352B (en) | COMBINED ELECTRICAL RELAY STARTER DEVICE | |
| US3041515A (en) | Protective circuit | |
| US2844778A (en) | Protective arrangement for stator motors | |
| JPH012232A (en) | overload protection device | |
| CN1298089C (en) | Circuit protector and method for over current and over heat protection thereof | |
| JPH0341441Y2 (en) | ||
| US1556573A (en) | Thermal relay and cut-out | |
| JPS6114488A (en) | Overload protecting apparatus for compressor | |
| JPS60185325A (en) | Thermal protector | |
| JP2512581B2 (en) | Circuit breaker | |
| JP2003217413A (en) | Motor protective device | |
| RU1772863C (en) | Device to protect three-phase electric motor from emergency conditions | |
| JPS60185327A (en) | Thermal protector | |
| JPS6017880Y2 (en) | winding equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |