JPH04242034A - Electromagnetic contactor - Google Patents
Electromagnetic contactorInfo
- Publication number
- JPH04242034A JPH04242034A JP362491A JP362491A JPH04242034A JP H04242034 A JPH04242034 A JP H04242034A JP 362491 A JP362491 A JP 362491A JP 362491 A JP362491 A JP 362491A JP H04242034 A JPH04242034 A JP H04242034A
- Authority
- JP
- Japan
- Prior art keywords
- contact
- support frame
- movable
- contact support
- fulcrum
- 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
- 239000011347 resin Substances 0.000 claims description 13
- 229920005989 resin Polymers 0.000 claims description 13
- 230000007423 decrease Effects 0.000 claims description 12
- 239000004734 Polyphenylene sulfide Substances 0.000 claims description 6
- 229920000069 polyphenylene sulfide Polymers 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 238000003466 welding Methods 0.000 abstract description 10
- 208000023414 familial retinal arterial macroaneurysm Diseases 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 239000005011 phenolic resin Substances 0.000 description 5
- 230000008602 contraction Effects 0.000 description 3
- 229920003002 synthetic resin Polymers 0.000 description 3
- 239000000057 synthetic resin Substances 0.000 description 3
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 229920001568 phenolic resin Polymers 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 229920000265 Polyparaphenylene Polymers 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- -1 polyphenylene Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は電磁接触器、特に接点に
おける電気的性能を長期間維持するようにしたものに関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic contactor, and more particularly to a contactor which maintains electrical performance at its contacts for a long period of time.
【０００２】0002
【従来の技術】図２は従来の電磁接触器全体の機構を示
す断面図、図３は図２のＩＩＩ −ＩＩＩ 線断面図、
図４は同電磁接触器の接点支持部の使用後を示す断面図
である。
図において、１は三相の電源からモータ等の負荷への通
電を行うため、間隔をあけて配置された三極の第１可動
接触子、２は各第１可動接触子１の両端に設けられた可
動接点、３は各第１可動接触子１の動きを拘束しない範
囲で一定方向に付勢する押ばね、４は三極の第１可動接
触子１を押ばね３を介して互いに一定の等間隔で平行に
支持し、且つこれら第１可動接触子１を同方向に移動さ
せる合成樹脂製の接点支持枠、４ａは接点支持枠４にお
ける後述する電磁石の駆動力を受ける支点、５は各第１
可動接触子１の可動接点２に対向する固定接点６を有し
、接点支持枠４の両側に配置された第１固定接触子、７
はモータ等の負荷への通電とは別に制御用に付加された
第２可動接触子、８は第２可動接触子７に対向する第２
固定接触子、９は第１固定接触子を固定し、接点支持枠
４を収納する上部ケース、１０は支点支持枠４の駆動源
となる電磁石、１１は電磁石１０の駆動力を接点支持枠
４へ伝えるリンクで、電磁石１０とで接点支持枠４を駆
動させる電磁石装置を構成している。１２は電磁石１０
を収納する下部ケース、１３は接点支持枠４に取り付け
られた戻しばねである。2. Description of the Related Art FIG. 2 is a cross-sectional view showing the entire mechanism of a conventional electromagnetic contactor, and FIG. 3 is a cross-sectional view taken along the line III--III in FIG.
FIG. 4 is a sectional view showing the contact support portion of the electromagnetic contactor after use. In the figure, 1 is a three-pole first movable contact placed at intervals in order to conduct electricity from a three-phase power source to a load such as a motor, and 2 is a three-pole first movable contact placed at both ends of each first movable contact 1. 3 is a push spring that biases each first movable contact 1 in a fixed direction within a range that does not restrict the movement; 4 is a push spring that biases the three-pole first movable contact 1 to each other through the push spring 3; A contact support frame made of synthetic resin that supports the first movable contacts 1 in parallel at equal intervals and moves them in the same direction; 4a is a fulcrum in the contact support frame 4 that receives the driving force of an electromagnet, which will be described later; 5 is a support frame made of synthetic resin; each first
A first fixed contact 7 having a fixed contact 6 facing the movable contact 2 of the movable contact 1 and disposed on both sides of the contact support frame 4;
8 is a second movable contact added for control purposes in addition to energizing a load such as a motor, and 8 is a second movable contact opposite to the second movable contact 7.
A fixed contact; 9 is an upper case for fixing the first fixed contact and housing the contact support frame 4; 10 is an electromagnet serving as a drive source for the fulcrum support frame 4; The link transmitting to the contact support frame 4 together with the electromagnet 10 constitutes an electromagnet device that drives the contact support frame 4. 12 is an electromagnet 10
13 is a return spring attached to the contact support frame 4.
【０００３】ここで、接点支持枠４の材料としては通常
熱による変形での第２可動接触子７の動きを阻害しない
ため及び耐熱性を高める観点からフェノール樹脂等の熱
硬化性樹脂が使用され、機械的に弱い部分がある場合に
は布入フェノール樹脂が使用される。布入フェノール樹
脂の場合、その特性は耐熱温度が１５０℃、収縮率は１
％程度である。[0003] Here, as the material for the contact support frame 4, a thermosetting resin such as a phenol resin is usually used in order not to impede the movement of the second movable contact 7 due to deformation due to heat and from the viewpoint of increasing heat resistance. , cloth-filled phenolic resin is used when there are mechanically weak parts. In the case of cloth-filled phenolic resin, its heat resistance temperature is 150℃, and the shrinkage rate is 1.
It is about %.
【０００４】次に、従来の電磁接触器の動作について説
明する。電磁石１０の吸引力により発した駆動力はリン
ク１１を介して接点支持枠４に伝わり、図２において接
点支持枠４を上から下へと移動させる。そして、移動し
た接点支持枠４に一定の等間隔で平行に支持されている
三極の第１可動接触子１も移動して各可動接点２と各固
定接点６との間隔を小さくし、略同時に各接点は接触し
、通電を開始する。以後、押しばね３を圧縮しながら接
点支持枠４はさらに移動し、停止した後にある位置で電
磁石１０の吸引力状態を保持する。その際、電磁石１０
の駆動力は作用し続けるが、この駆動力が消滅すると、
戻しばね１３により、接点支持枠４は図２の下から上へ
と移動し、各接点はほぼ同時に開離する。Next, the operation of a conventional electromagnetic contactor will be explained. The driving force generated by the attractive force of the electromagnet 10 is transmitted to the contact support frame 4 via the link 11, and moves the contact support frame 4 from top to bottom in FIG. Then, the three-pole first movable contact 1 supported parallel to the moved contact support frame 4 at regular intervals is also moved to reduce the distance between each movable contact 2 and each fixed contact 6, and approximately At the same time, each contact comes into contact and starts energizing. Thereafter, the contact support frame 4 moves further while compressing the push spring 3, and after stopping, maintains the attractive force state of the electromagnet 10 at a certain position. At that time, electromagnet 10
The driving force continues to act, but when this driving force disappears,
The return spring 13 moves the contact support frame 4 from the bottom to the top in FIG. 2, and the contacts open almost simultaneously.
【０００５】[0005]
【発明が解決しようとする課題】上記のような従来の電
磁接触器では、接点支持枠４に三極の第１可動接触子１
が一定の等間隔で平行に支持され、各第１可動接触子１
の可動接点２と各第１固定接触子５の固定接点６との間
隔がどの接点間でも同じ間隔Ａに形成されているため、
電磁接触器の使用初期状態では電磁石１０によって接点
支持枠４が上下に移動させられた場合、三極の第１可動
接触子１の可動接点２と三極の第１固定接触子５の固定
接点６はほぼ同時に開離するように動作する。しかしな
がら、電磁接触器の使用期間が比較的短い期間であって
も、合成樹脂製の接点支持枠４は熱収縮率が大きいため
、可動接点２や電磁石１０から発した熱が接点支持枠４
を収縮させ、またその収縮量は飽和して図４に示すよう
に接点間隔に差を生じさせる。その差は接点支持枠４の
駆動力の支点４ａから遠距離に位置する程接点間隔が広
くなるもので、図４に示すようにＡ＜Ｄ＜Ｅの状態とな
る。これは接点支持枠４の収縮はそれが全体的に略均一
に収縮するので、駆動力の支点４ａから遠距離に位置す
るものほど影響が大きくなるためである。[Problems to be Solved by the Invention] In the conventional electromagnetic contactor as described above, the three-pole first movable contact 1 is mounted on the contact support frame 4.
are supported in parallel at regular intervals, and each first movable contact 1
Since the distance between the movable contact 2 and the fixed contact 6 of each first fixed contact 5 is the same distance A between all contacts,
In the initial state of use of the electromagnetic contactor, when the contact support frame 4 is moved up and down by the electromagnet 10, the movable contact 2 of the three-pole first movable contact 1 and the fixed contact of the three-pole first fixed contact 5 6 operate to open almost simultaneously. However, even if the electromagnetic contactor is used for a relatively short period of time, the contact support frame 4 made of synthetic resin has a high thermal shrinkage rate, so the heat emitted from the movable contact 2 and the electromagnet 10 is transferred to the contact support frame 4.
The amount of contraction is saturated, causing a difference in the contact spacing as shown in FIG. The difference is that the distance between the contacts becomes wider as the distance from the fulcrum 4a of the driving force of the contact support frame 4 increases, and as shown in FIG. 4, A<D<E. This is because the contact support frame 4 contracts substantially uniformly as a whole, and the farther away from the driving force fulcrum 4a the contact support frame 4 is located, the greater the influence.
【０００６】このようにＡからＥへと次第に広がった接
点間隔では開離のタイミングを狂わせてアークが一極の
接点間に集中するようになり、一極の接点消耗を早める
という問題点があった。[0006] As described above, when the contact spacing gradually widens from A to E, there is a problem that the timing of opening is shifted and arcs concentrate between the contacts of one pole, accelerating the wear of the contacts of one pole. Ta.
【０００７】また、ＡからＥへと次第に広がった接点間
隔では、接点接触時における押ばね３による接点接触圧
力が間隔が広がった接点部分で当初よりも低下するため
、接点消耗限界以前に接点溶着が生じ易くなるという問
題点があった。そこで、かかる問題点を解消するために
、接点間隔が広がったときにも最少の接点接触圧力を維
持できるように接点間隔の広がり即ち接点支持枠４の収
縮分を見込んで当初に三極共、押ばね３の付勢力を大き
く設定していたが、この場合には、電磁石１０による吸
引が苦しくなるという難点があった。Furthermore, when the contact spacing gradually widens from A to E, the contact pressure caused by the compression spring 3 at the time of contact is lower than the initial pressure at the contact portion where the spacing has widened, so that the contact welding occurs before the contact wear limit. There was a problem in that it was more likely to occur. Therefore, in order to solve this problem, in order to maintain the minimum contact pressure even when the contact distance is widened, in anticipation of the expansion of the contact distance, that is, the shrinkage of the contact support frame 4, the three poles were initially installed. The biasing force of the push spring 3 was set to be large, but in this case, there was a problem in that the attraction by the electromagnet 10 became difficult.
【０００８】本発明は上記のような問題点を解消するた
めになされたもので、接点消耗の一極集中を防止し、接
点消耗限界以前の接点溶着の発生を防止し、長期間安定
した電気的性能を維持することのできる電磁接触器を得
ることを目的とする。The present invention has been made to solve the above-mentioned problems, and it prevents the concentration of contact wear and tear, prevents the occurrence of contact welding before the contact wear limit, and provides stable electricity for a long period of time. The purpose of this invention is to obtain an electromagnetic contactor that can maintain the desired performance.
【０００９】[0009]
【課題を解決するための手段】本発明に係る電磁接触器
は、各可動接触子とこれに対向する固定接触子とで形成
される間隔が摺動する樹脂製の接点支持枠における電磁
石装置の駆動力を受ける支点から遠ざかるに従い順次狭
くなるように上記複数の可動接触子を接点支持枠に支持
させ、各可動接触子を付勢する押ばねの付勢力を接点支
持枠の駆動力を受ける支点から遠ざかるに従い順次強く
設定するか、該支点から少なくとも最も遠距離の押ばね
の付勢力を最も近距離の押ばねの付勢力よりも強く設定
するようにしたものである。[Means for Solving the Problems] An electromagnetic contactor according to the present invention includes an electromagnetic device in a resin contact support frame in which the interval formed by each movable contact and a fixed contact opposing the movable contact slides. The plurality of movable contacts are supported by a contact support frame so as to become narrower as they move away from the fulcrum that receives the driving force, and the fulcrum receives the driving force of the contact support frame and the urging force of the push spring that biases each movable contact. The biasing force of the push spring located farthest from the fulcrum is set to be stronger than the biasing force of the push spring closest to the fulcrum.
【００１０】また、接点支持枠をポリフェニレン・サル
ファイド樹脂で形成することが好ましい。[0010] Furthermore, it is preferable that the contact support frame is made of polyphenylene sulfide resin.
【００１１】[0011]
【作用】本発明においては、各可動接触子とこれに対向
する固定接触子とで形成される間隔が摺動する樹脂製の
接点支持枠における電磁石装置の駆動力を受ける支点か
ら遠ざかるに従い順次狭くなるように複数の可動接触子
を接点支持枠に支持させるようにしたから、比較的短期
間の使用により樹脂製の接点支持枠が収縮し、飽和点に
達しときに、接点支持枠の駆動力を受ける支点から遠距
離にある可動接触子と固定接触子の間隔は近距離にある
可動接触子と固定接触子の間隔と同程度になる。[Operation] In the present invention, the distance formed between each movable contact and the fixed contact facing it becomes narrower as it moves away from the fulcrum that receives the driving force of the electromagnetic device in the sliding resin contact support frame. Since the multiple movable contacts are supported by the contact support frame, the driving force of the contact support frame shrinks after a relatively short period of use and reaches the saturation point. The distance between the movable contact and the fixed contact that are far away from the receiving fulcrum is approximately the same as the distance between the movable contact and the fixed contact that are close to each other.
【００１２】また、各可動接接触子を付勢する押ばねの
付勢力を接点支持枠の駆動力を受ける支点から遠ざかる
に従い順次強く設定するか、該支点から少なくとも最も
遠距離の押ばねの付勢力を最も近距離の付勢力よりも強
く設定したから、比較的短期間使用後に接点支持枠が熱
によって収縮し、接点間隔が広がって接点接触圧力が低
下しても、予め押ばねの付勢力を強くしていることでそ
の低下分が相殺され、各接点間又は一部の接点間におけ
る最小の接点接触圧力の低下が防止される。[0012] Also, the biasing force of the push spring that biases each movable contact may be set to become stronger as the distance from the fulcrum that receives the driving force of the contact support frame increases, or the biasing force of the push spring that is at least the farthest from the fulcrum may be set to be stronger. Because the force is set to be stronger than the biasing force at the closest distance, even if the contact support frame contracts due to heat after a relatively short period of use, the contact gap widens, and the contact contact pressure decreases, the biasing force of the compression spring will be reduced in advance. By increasing the pressure, the decrease is offset and a decrease in the minimum contact contact pressure between each contact or some of the contacts is prevented.
【００１３】更に、接点支持枠をポリフェニレン・サル
ファイド樹脂で形成しているから、接点支持枠の耐熱温
度は２４０℃、収縮率が０．１５％程度となり、例えば
フェノール樹脂に比べて耐熱性、収縮率の点で優れてお
り、長期間使用後の接点支持枠の収縮量は微量で可動接
触子と固定接触子の間隔を長期に且つて保持できる。Furthermore, since the contact support frame is made of polyphenylene sulfide resin, the contact support frame has a heat resistance temperature of 240°C and a shrinkage rate of about 0.15%, which means that it has better heat resistance and shrinkage than, for example, phenol resin. The contact support frame shrinks only a small amount after long-term use, and the distance between the movable contact and the fixed contact can be maintained for a long period of time.
【００１４】[0014]
【実施例】図１は本発明の一実施例である電磁接触器の
接点支持部を断面図である。図３は従来の電磁接触器の
接点支持部の当初使用状態を示しているが、本発明の一
実施例である電磁接触器の接点支持部の長期使用後の状
態をも示す断面図である。図において、従来例と同一の
構成は同一符号を付して重複した構成の説明を省略する
。この実施例では三極の第１可動接触子１とこれらにそ
れぞれ対向する第１固定接触子５とで形成される間隔が
接点支持枠４の駆動を受ける支点から遠ざかるに従い順
次狭くなるように、三極の第１可動接触子１が接点支持
枠４に平行に支持されている。また、各第１可動接触子
１を付勢する押しばね３の付勢力を接点支持枠４の駆動
力を受ける支点４ａから遠ざかるに従い順次強く設定し
ている。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a sectional view of a contact support portion of an electromagnetic contactor according to an embodiment of the present invention. FIG. 3 shows the contact support portion of a conventional electromagnetic contactor in its initial state of use, but is also a sectional view showing the state of the contact support portion of an electromagnetic contactor according to an embodiment of the present invention after long-term use. . In the figure, components that are the same as those of the conventional example are given the same reference numerals, and explanations of duplicated components will be omitted. In this embodiment, the interval formed between the three-pole first movable contactor 1 and the first fixed contactor 5 facing each of them becomes gradually narrower as the distance from the fulcrum that receives the drive of the contact support frame 4 is increased. A three-pole first movable contact 1 is supported in parallel to a contact support frame 4. Further, the biasing force of the push spring 3 that biases each first movable contact 1 is set to be gradually stronger as the distance from the fulcrum 4a receiving the driving force of the contact support frame 4 increases.
【００１５】上記のように構成された電磁接触器におい
ては、三極の第１可動接触子１とこれらにそれぞれ対向
する第１固定接触子５とで形成される間隔が接点支持枠
４の駆動力を受ける支点４ａから遠ざかるに従い順次狭
くなるように形成されているため、比較的短期間の使用
により樹脂製の接点支持枠４が可動接点２や電磁石１０
から発した熱により収縮させられ、飽和点に達したとき
に、接点支持枠４の駆動力を受ける支点４ａから最も遠
距離にある第１可動接触子１と第１固定接触子５の間隔
Ｃは最も近距離にある第１可動接触子１と第１固定接触
子５の当初の間隔Ａと同程度になる。その中間の距離に
ある第１可動接触子１と第１固定接触子５の間隔Ｂも前
記間隔Ａや間隔Ｃと同程度になる。これは、接点支持枠
４の収縮が全体的にほぼ均一に生じるので、駆動力を受
ける支点４ａから遠距離に位置するものほど影響は大き
くなるから、予めその分を見越して駆動力を受ける支点
４ａから遠距離に位置するものの間隔Ｃを狭めておけば
足りるからである。In the electromagnetic contactor configured as described above, the distance formed by the three-pole first movable contact 1 and the first fixed contact 5 facing each of them is the driving force of the contact support frame 4. Since it is formed so that it becomes narrower as it goes away from the fulcrum 4a that receives the force, the resin contact support frame 4 can be used for a relatively short period of time to prevent the movable contact 2 or the electromagnet 10 from forming.
The distance C between the first movable contact 1 and the first fixed contact 5 that is farthest from the fulcrum 4a that receives the driving force of the contact support frame 4 when the contact is contracted by the heat emitted from the fulcrum and reaches the saturation point. is approximately the same as the initial distance A between the first movable contact 1 and the first fixed contact 5, which are closest to each other. The distance B between the first movable contact 1 and the first fixed contact 5, which is located at an intermediate distance between them, is also approximately the same as the distance A and the distance C. This is because the contraction of the contact support frame 4 occurs almost uniformly as a whole, and the further away from the fulcrum 4a that receives the driving force, the greater the effect, so the fulcrum that receives the driving force is calculated in advance. This is because it is sufficient to narrow the distance C between objects located far away from 4a.
【００１６】従って、比較的短距離から長期にわたって
使用されても、三極の第１可動接触子１の可動接点２と
これらにそれぞれ対向する第１固定接触子５の固定接点
６とでそれぞれ形成される間隙は互いに同程度となるた
め、各可動接点２と各固定接点６との開離のタイミング
が狂わず、アークが一極に集中することがなくなり、接
点消耗の一極集中もなくなった。Therefore, even when used over a relatively short distance or for a long period of time, the movable contact 2 of the three-pole first movable contact 1 and the fixed contact 6 of the first fixed contact 5 facing each other are formed. Since the gaps between each movable contact 2 and each fixed contact 6 are the same, the timing of opening between each movable contact 2 and each fixed contact 6 is not deviated, arcs are not concentrated at one pole, and contact wear is no longer concentrated at one pole. .
【００１７】また、比較的短期間の使用によって接点支
持枠４が熱によって収縮し、それによって接点支持枠４
の駆動力を受けるね支点４ａの近距離から遠距離にいく
に従い可動接点２と固定接点５との間隔が次第に広くな
るのに伴って押ばね３による各接点間における接点接触
圧力も遠距離に位置するもの程、次第に低下していくが
、各第１可動接触子１を付勢する押ばね３の付勢力を当
初に接点支持枠４の駆動力を受ける支点４ａから遠ざか
るに従い次第に強く設定しているため、接点接触圧力の
低下分が相殺されて比較的短期間の使用後に各接点間に
おける接点接触圧力は略等しく、しかも最小の接点接触
圧力の変化も小さくなる。従って、接点接触圧力の低下
による接点消耗限界以前の接点溶着の危険もなくなる。Furthermore, the contact support frame 4 may shrink due to heat due to use for a relatively short period of time, and as a result, the contact support frame 4 may shrink due to heat.
The distance between the movable contact 2 and the fixed contact 5 gradually increases as the distance from the spring fulcrum 4a, which receives the driving force of The biasing force of the push spring 3 that biases each first movable contact 1 is initially set to be stronger as it moves away from the fulcrum 4a that receives the driving force of the contact support frame 4, although it gradually decreases as the movable contact 1 moves further away. Therefore, the decrease in contact pressure is offset, and after a relatively short period of use, the contact pressure between the contacts is approximately equal, and the change in the minimum contact pressure is also small. Therefore, there is no risk of contact welding before the contact wear limit due to a decrease in contact pressure.
【００１８】更に、接点支持枠４の駆動力を受ける支点
４ａから最も遠距離の押ばね３の付勢力を最も近距離の
押ばね３の付勢力よりも強く設定するようにしておけば
、接点接触圧力の低下による接点溶着の危険は少なくな
り、しかも一部のみ押ばね３の付勢力が高まるだけであ
るから、従来例のように三極共押ばね３の付勢力を高め
たものに比べて電磁石の吸引が苦しくなるということも
ない。Furthermore, if the biasing force of the push spring 3 located farthest from the fulcrum 4a receiving the driving force of the contact support frame 4 is set to be stronger than the biasing force of the push spring 3 closest to the fulcrum 4a, the contact The risk of contact welding due to a decrease in contact pressure is reduced, and the biasing force of the push spring 3 is only partially increased, compared to the conventional example in which the biasing force of the three-pole push spring 3 is increased. Therefore, the attraction of the electromagnet does not become difficult.
【００１９】また、接点支持枠４をポリフェニレン・サ
ルファイド樹脂で形成した場合には、三極の第１可動接
触子１の可動接点２とこれらと対向する第１固定接触子
５の固定接点６とでそれぞれ形成される間隔を図２に示
す従来例と同様に互いに同じＡにしたとしても、ポリフ
ェニレン・サルファイド樹脂は耐熱温度が２４０℃で収
縮量は０．１５％と少なく、長期間使用されても初期に
Ａであった間隔はＡのまま保持される。Furthermore, when the contact support frame 4 is made of polyphenylene sulfide resin, the movable contact 2 of the three-pole first movable contact 1 and the fixed contact 6 of the first fixed contact 5 facing these Even if the distances formed in each are made to be the same A as in the conventional example shown in Fig. 2, polyphenylene sulfide resin has a heat resistance temperature of 240°C and a small shrinkage amount of 0.15%, so it cannot be used for a long time. Also, the interval that was initially A is kept as A.
【００２０】例えば、定格電流が１２Ａクラスの電磁接
触器について、接点支持枠４がフェノール樹脂製のもの
では、可動接点２と固定接点５の間隔の極間差が約０．
５ｍｍ以上も大きくなったのに対し、ポリフェニレン・
サルファイド樹脂製のものでは０．１ｍｍもない程度で
、接点消耗、接着溶着に対して非常に良好なことが実証
されている。For example, for an electromagnetic contactor with a rated current of 12 A, if the contact support frame 4 is made of phenol resin, the difference in the distance between the movable contact 2 and the fixed contact 5 is about 0.
While it has become larger by more than 5mm, polyphenylene
For those made of sulfide resin, the thickness is less than 0.1 mm, and has been proven to be extremely resistant to contact wear and adhesive welding.
【００２１】[0021]
【発明の効果】本発明は以上説明したとおり、各可動接
触子とこれに対向する固定接触子とで形成される間隔が
接点支持枠の駆動力を受ける支点から遠ざかるに従い順
次狭くなるように複数の可動接触子を接点支持枠に支持
させておき、比較的短期間使用後に接点支持枠の熱によ
る収縮量が飽和した状態で複数の可動接触子の可動接点
とこれらに対向する固定接触子の固定接点とでそれぞれ
形成される間隔が等しくなるようにしたので、接点表面
が消耗して溶着の危険領域に近づいても接点開離のタイ
ミングは一致するためにアークは各極に分散され、接点
消耗の一極集中を防止できるという効果を有する。また
、各可動接触子を付勢する押ばねの付勢力を支点支持枠
の駆動力を受ける支点から遠ざかるに従い順次強く設定
するか、該支点から少なくとも最も遠距離の押ばねの付
勢力を最も近距離の付勢力よりも強く設定し、比較的短
期間使用後に接点支持枠が熱によって収縮し、接点間隔
が広がって接点接触圧力が低下しても予め押ばねの付勢
力を強くしていることでその低下分を相殺し、各接点又
は一部の接点間における最小の接点接触圧力の低下をな
くすようにするようにしたので、接点接触圧力の低下に
よる接点消耗限界以前の接点溶着の危険性が少なくなり
、電磁石装置の吸引も無理なく行えるという効果がある
。Effects of the Invention As described above, the present invention provides a plurality of contact lenses in which the distance formed between each movable contact and the opposing fixed contact gradually narrows as it moves away from the fulcrum that receives the driving force of the contact support frame. The movable contacts of the plurality of movable contacts are supported by the contact support frame, and after a relatively short period of use, when the amount of contraction due to heat in the contact support frame is saturated, the movable contacts of the plurality of movable contacts and the fixed contact facing them are removed. Since the distance formed between each fixed contact and the fixed contact is equal, even if the contact surface wears out and approaches the dangerous area of welding, the timing of the contact opening will be the same, so the arc will be dispersed to each pole, and the contact will This has the effect of preventing excessive concentration of consumption. In addition, the biasing force of the push spring that biases each movable contact may be set to become stronger as the distance from the fulcrum that receives the driving force of the fulcrum support frame increases, or at least the biasing force of the push spring that is farthest from the fulcrum may be set to be the closest. The biasing force of the push spring should be set stronger than the biasing force of the distance, and even if the contact support frame shrinks due to heat after a relatively short period of use, the contact gap widens, and the contact contact pressure decreases, the biasing force of the push spring should be strengthened in advance. This reduces the risk of contact welding before the contact wear limit due to a decrease in contact pressure due to a decrease in contact pressure. This has the effect that the electromagnetic device can be easily attracted.
【００２２】更に、接点支持枠をポリフェニレン・サル
ファイド樹脂で形成し、接点支持枠の収縮そのものを防
止するようにしたので、複数の可動接触子とこれらに対
向する固定接触子とで形成される間隔を同じにしたとし
ても、アークの一極集中や接点接触圧力の低下という問
題は起こらず、接点消耗の一極集中や、接点溶接の危険
性が少なくないという効果がある。Furthermore, since the contact support frame is made of polyphenylene sulfide resin to prevent the contact support frame from shrinking, the distance formed between the plurality of movable contacts and the fixed contact facing them is reduced. Even if they are made the same, the problem of arc concentration and decrease in contact contact pressure does not occur, but there is an effect that there is a significant concentration of contact wear and tear and the risk of contact welding.
【図１】本発明の一実施例である電磁接触器の接点支持
部を示す断面図である。FIG. 1 is a sectional view showing a contact support part of an electromagnetic contactor according to an embodiment of the present invention.
【図２】従来の電磁接触器全体の機構を示す断面図であ
る。FIG. 2 is a sectional view showing the entire mechanism of a conventional electromagnetic contactor.
【図３】図２のＩＩＩ −ＩＩＩ 線断面図である。FIG. 3 is a sectional view taken along line III-III in FIG. 2;
【図４】同電磁接触器の接点支持部の使用後を示す断面
図である。FIG. 4 is a sectional view showing the contact support portion of the electromagnetic contactor after use.
１ 第１可動接触子 ３ 押ばね ４ 接点支持枠 ４ａ 支点 ５ 第１固定接触子 １０ 電磁石（電磁石装置） １１ リンク（電磁石装置） 1 First movable contact 3 Push spring 4 Contact support frame 4a Fulcrum 5 First fixed contact 10 Electromagnet (electromagnetic device) 11 Link (electromagnetic device)
Claims (2)
触子と、これら可動接触子を押ばねを介して支持し、可
動接触子が並ぶ方向に摺動する樹脂性の接点支持枠と、
各可動接触子と対向して設置された固定接触子と、接点
支持枠を駆動させる電磁石装置とを備えた電磁接触器に
おいて、各可動接触子とこれに対向する固定接触子とで
形成される間隔が上記接点支持枠における電磁石装置の
駆動力を受ける支点から遠ざかるに従い順次狭くなるよ
うに上記複数の可動接触子を接点支持枠に支持させ、各
可動接触子を付勢する押ばねの付勢力を接点支持枠の駆
動力を受ける支点から遠ざかるに従い順次強く設定する
か、該支点から少なくとも最も遠距離の押ばねの付勢力
を最も近距離の押ばねの付勢力よりも強く設定するよう
にしたことを特徴とする電磁接触器。1. A plurality of movable contacts arranged in parallel at intervals, a resin contact support frame that supports these movable contacts via a compression spring and slides in the direction in which the movable contacts are arranged;
In an electromagnetic contactor equipped with a fixed contact installed opposite each movable contact and an electromagnetic device for driving a contact support frame, each movable contact is formed by each movable contact and the fixed contact opposed thereto. The plurality of movable contacts are supported by the contact support frame so that the distance becomes narrower as the distance from the fulcrum receiving the driving force of the electromagnetic device in the contact support frame gradually decreases, and the biasing force of a push spring biases each movable contact. is set to become stronger as it moves away from the fulcrum that receives the driving force of the contact support frame, or at least the biasing force of the push spring furthest from the fulcrum is set to be stronger than the biasing force of the push spring closest to the fulcrum. An electromagnetic contactor characterized by:
触子と、これら可動接触子を押ばねを介して支持し、可
動接触子が並ぶ方向に摺動する樹脂性の接点支持枠と、
各可動接触子と対向して設置された固定接触子と、接点
支持枠を駆動させる電磁石装置とを備えた電磁接触器に
おいて、接点支持枠がポリフェニレン・サルファイド樹
脂で成形されていることを特徴とする電磁接触器。2. A plurality of movable contacts arranged in parallel at intervals, a resin contact support frame that supports these movable contacts via a compression spring and slides in the direction in which the movable contacts are arranged;
An electromagnetic contactor comprising a fixed contact placed opposite each movable contact and an electromagnetic device for driving the contact support frame, characterized in that the contact support frame is molded from polyphenylene sulfide resin. electromagnetic contactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3003624A JP2640576B2 (en) | 1991-01-17 | 1991-01-17 | Electromagnetic contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3003624A JP2640576B2 (en) | 1991-01-17 | 1991-01-17 | Electromagnetic contactor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04242034A true JPH04242034A (en) | 1992-08-28 |
| JP2640576B2 JP2640576B2 (en) | 1997-08-13 |
Family
ID=11562652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3003624A Expired - Lifetime JP2640576B2 (en) | 1991-01-17 | 1991-01-17 | Electromagnetic contactor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2640576B2 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4970178A (en) * | 1972-11-09 | 1974-07-06 | ||
| JPS57117019U (en) * | 1981-01-13 | 1982-07-20 | ||
| JPS59132139U (en) * | 1983-02-22 | 1984-09-04 | 神鋼電機株式会社 | Auxiliary contact structure of magnetic contactor |
| JPS6242509A (en) * | 1985-08-20 | 1987-02-24 | 松下電器産業株式会社 | Manufacture of solid electrolytic capacitor |
-
1991
- 1991-01-17 JP JP3003624A patent/JP2640576B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4970178A (en) * | 1972-11-09 | 1974-07-06 | ||
| JPS57117019U (en) * | 1981-01-13 | 1982-07-20 | ||
| JPS59132139U (en) * | 1983-02-22 | 1984-09-04 | 神鋼電機株式会社 | Auxiliary contact structure of magnetic contactor |
| JPS6242509A (en) * | 1985-08-20 | 1987-02-24 | 松下電器産業株式会社 | Manufacture of solid electrolytic capacitor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2640576B2 (en) | 1997-08-13 |
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