WO2023135992A1 - Electromagnetic contactor - Google Patents

Electromagnetic contactor Download PDF

Info

Publication number
WO2023135992A1
WO2023135992A1 PCT/JP2022/045155 JP2022045155W WO2023135992A1 WO 2023135992 A1 WO2023135992 A1 WO 2023135992A1 JP 2022045155 W JP2022045155 W JP 2022045155W WO 2023135992 A1 WO2023135992 A1 WO 2023135992A1
Authority
WO
WIPO (PCT)
Prior art keywords
cover
arc
extinguishing
case
engaging portion
Prior art date
Application number
PCT/JP2022/045155
Other languages
French (fr)
Japanese (ja)
Inventor
充哉 伊藤
幸悦 高谷
翔太 菊地
Original Assignee
富士電機機器制御株式会社
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.)
Filing date
Publication date
Application filed by 富士電機機器制御株式会社 filed Critical 富士電機機器制御株式会社
Priority to CN202280046377.3A priority Critical patent/CN117581325A/en
Priority to KR1020237044881A priority patent/KR20240011830A/en
Priority to JP2023573905A priority patent/JP7487852B2/en
Publication of WO2023135992A1 publication Critical patent/WO2023135992A1/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/02—Bases; Casings; Covers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays

Definitions

  • the present invention relates to an electromagnetic contactor, and more particularly to a structure for holding an arc extinguishing cover.
  • the magnetic contactor is provided with a lower case and an upper case made of insulating synthetic resin material, and the upper case is fixed with terminals each having a contact, and an arc extinguishing chamber in the upper case.
  • a contact portion having a movable contact and a fixed contact is housed in the housing.
  • An electromagnet for driving the contact portion is housed in the lower case.
  • An arc-extinguishing cover is attached to the upper case to cover the contact portion in the arc-extinguishing chamber.
  • the electromagnetic contactor of Patent Document 1 has a first engaging portion and a second engaging portion formed on one of the upper case and the arc extinguishing cover, and the first engaging portion and the second engaging portion on the other.
  • a gap is formed between the arc-extinguishing cover and the upper case by setting the second engagement state in which the joining portion and the third engaging portion are engaged, and the generated arc gas is released to the outside, resulting in the internal pressure of the arc-extinguishing chamber. are trying to reduce
  • the present invention prevents the engagement force of the arc-extinguishing cover with respect to the case from decreasing when shifting from the first engaged state to the second engaged state, thereby releasing the arc gas generated in the arc-extinguishing chamber to the outside.
  • an electromagnetic contactor includes a case in which a contact portion having a movable contact and a fixed contact is housed in an arc-extinguishing chamber, and a case that covers the arc-extinguishing chamber.
  • the arc extinguishing cover is formed with a first engaging portion and a second engaging portion spaced apart in the mounting direction with respect to the case, and the case has a third engaging portion and a fourth engaging portion are formed, and in the first engaging state in which the first engaging portion and the third engaging portion are engaged, the arc-extinguishing cover is attached to the case so as to seal the arc-extinguishing chamber.
  • the arc-extinguishing cover In the second engagement state in which the second engaging portion and the fourth engaging portion are engaged, the arc-extinguishing cover is held by the case with a gap provided between the arc-extinguishing cover and the case.
  • the first engagement state in which the arc-extinguishing cover is attached to the case is shifted to the second engagement state in which a gap is provided between the arc-extinguishing cover and the case.
  • FIG. 3 is a cross-sectional view of a main part taken along line IV-IV in FIG. 2; It is the figure which showed the arc-extinguishing cover from the front side. It is the figure which showed the arc-extinguishing cover from the back side. It is a perspective view which shows the shape of the upper case side which removed the arc-extinguishing cover.
  • FIG. 3 is a cross-sectional view of essential parts taken along the line XX in FIG. 2, showing a first engagement state in which the arc-extinguishing cover is attached to the upper case
  • FIG. 10 is a cross-sectional view of a main part showing a second engagement state in which the arc-extinguishing cover is attached to the upper case with a gap;
  • an electromagnetic contactor 1 showing an embodiment according to the present invention is divided into upper and lower parts, and is provided with a lower case 2 and an upper case 3 which are formed of an insulating synthetic resin material. ing.
  • the upper case 3 is provided with main circuit power supply side terminal portions 4a1 to 4c1, main circuit load side terminal portions 4a2 to 4c2, auxiliary power supply side terminal portion 4d1, and auxiliary load side terminal portion 4d2, which will be described later.
  • An arc-extinguishing cover 7 for sealing the arc-extinguishing chamber 12 is attached.
  • An electromagnet (not shown) for driving a contact portion 6, which will be described later, is housed in the lower case 2, and a pair of coil terminals 4e for the electromagnet are fixed to the lower case 2. As shown in FIG.
  • FIG. 3 shows a state in which the arc extinguishing cover 7 is removed from the upper case 3 of the electromagnetic contactor 1.
  • the upper case 3 is formed with a pair of main circuit case walls 10a and 10b that are spaced apart in the left-right direction and continuously extend in the front-rear direction, partitioning the main circuit case walls 10a and 10b in parallel, Two pairs of case partition walls 11a1, 11a2 and 11b1, 11b2 are formed spaced apart from each other in the front-rear direction. Further, an auxiliary circuit case wall 11c is formed in parallel with the outside of the main circuit case wall 10a.
  • main circuit case walls 10a, 10b and the case partition walls 11a1, 11a1 and 11b1, 11b2, the main circuit power supply side terminal portions 4a1 to 4c1 and the main circuit load side terminal portions 4a2 to 4c2 are arranged,
  • An auxiliary power supply side terminal portion 4d1 and an auxiliary load side terminal portion 4d2 are arranged between the main circuit case wall 10a and the auxiliary circuit case wall 11c.
  • a contact portion 6 is arranged in a central portion of the upper case 3 surrounded by a pair of main circuit case walls 10a and 10b and case partition walls 11a and 11b.
  • a sealed arc extinguishing chamber 12 is provided as shown in FIG.
  • the contact portion 6 includes fixed contacts 13a of the power supply side terminal portions 4a1 to 4c1 of the main circuit (only the fixed contact 13a of the power supply side terminal portion 4b1 of the main circuit is shown in FIG. 4) and the main circuit.
  • the fixed contacts 13b of the load-side terminal portions 4a2 to 4c2 (only the fixed contact 13b of the load-side terminal portion 4b2 is shown in FIG. 4) and the fixed contacts 13a and 13b supported by the contact support 14 are connected to the movable contacts 15a and 15b. and a movable contactor 15 that contacts and separates.
  • a movable iron core 16 constituting an electromagnet is connected to the contact support 14. When an exciting coil (not shown) constituting the electromagnet is excited, the contact support 14 moves downward in FIG. Then, the movable contacts 15a and 15b come into contact with the fixed contacts 13a and 13b, resulting in a closed state.
  • the arc-extinguishing cover 7 includes a plate-shaped cover body 20, and a first cover wall portion 21 and a second cover wall portion 21 and a second cover wall portion 21 and a second cover wall portion 21 which are formed facing each other from the front-rear edge of the cover body 20, as shown in FIG. a wall portion 22; 5 is a front view of the arc-extinguishing cover 7 before being attached to the upper case 3 shown in FIG. 3, and FIG. 6 is a rear view of the arc-extinguishing cover 7 shown in FIG. shows a diagram.
  • the first cover wall portion 21 has an auxiliary partition wall 23 and power source partition walls 24a to 24c separated from each other in the left and right direction.
  • Cover-side engagement portions 25a-25f are formed on the edges of the cover-side engaging portions 25a-25f projecting outward in the left-right direction from positions inside the outer surfaces of the power supply-side partition walls 24a-24c and extending in the up-down direction.
  • a second hook portion 26 is formed at a lower position apart from the cover main body 20 of each of the cover side engaging portions 25a to 25f.
  • a first hook portion 27 is formed at an upper position closer to the cover main body 20 than the second hook portion 26 to the cover side engaging portion 25b formed on the left edge portion of the power supply side partition wall 24a.
  • the cover-side engaging portion 25e formed on the right edge of the power source-side partition wall 24c is also formed with a first hook portion 27 at an upper position closer to the cover main body 20 than the second hook portion 26 is. .
  • the second cover wall portion 22 has an auxiliary partition wall 28 and load-side partition walls 29a to 29c separated from each other in the left-right direction.
  • Cover-side engaging portions 30a-30f are formed on both edges of the load-side partition walls 29a-29c so as to protrude outward in the left-right direction and extend in the up-down direction.
  • a second hook portion 31 is formed at a lower position apart from the cover main body 20 of each of the cover side engaging portions 30a to 30f.
  • a first hook portion 32 is formed at an upper position closer to the cover main body 20 than the second hook portion 31 to the cover side engaging portion 30b formed on the left edge portion of the load side partition wall 29a.
  • a first hook portion 32 is also formed on the cover-side engaging portion 30e formed on the right edge portion of the load-side partition wall 29c at an upper position closer to the cover main body 20 than the second hook portion 31. .
  • cover side engaging portions 33a to 33d are provided inside the pair of main circuit case walls 10a and 10b and case partition walls 11a1 and 11a2 of the upper case 3 (on the side close to the contact portion 6). formed.
  • the cover-side engaging portion 33a is a plate-like portion extending in the left-right direction continuously from a portion of the main circuit case wall 10a, and the cover-side engaging portion 33d also extends from a portion of the main circuit case wall 10b. It is a plate-like portion continuously extending in the left-right direction.
  • the cover-side engaging portions 33b and 33c are C-shaped members extending in the left-right direction continuously from portions of the case partition walls 11a1 and 11a2.
  • Engagement stabilizing plates 34a to 34f are formed in parallel at positions spaced rearward from the cover-side engagement portions 33a to 33d.
  • the surfaces of the cover-side engaging portions 33a to 33d that face the most downward direction correspond to the cover-side engaging portions 25a to 25f of the first cover wall portion 21 of the arc-extinguishing cover 7, respectively. It is a second hook engaging portion 35 that engages with the second hook portion 26 provided in the . Further, the downward facing surfaces of the C-shaped notches of the cover-side engaging portions 33b and 33c are engaged with the first hook portions 27 provided on the cover-side engaging portions 25b and 25e of the first cover wall portion 21. It is a first hook engaging portion 36 that fits.
  • cover-side engaging portions 33a to 33d having the same shape are also provided inside the pair of main circuit case walls 10a and 10b and the case partition walls 11b1 and 11b2 of the upper case 3 (on the side near the contact portion 6). is formed. Further, the cover side engaging portions 33a to 33d are provided with second hooks that engage with the second hook portions 31 provided on the respective cover side engaging portions 30a to 30f of the second cover wall portion 22 of the arc extinguishing cover 7. An engaging portion 35 is formed. A first hook engaging portion 36 that engages with the first hook portion 32 provided on the cover side engaging portions 30b and 30e of the second cover wall portion 22 is formed. Engagement stabilizing plates 34a to 34f are formed in parallel at positions spaced forward from the cover-side engagement portions 33a to 33d.
  • FIG. 9 is a cross-sectional view of the main part taken along line XX of FIG.
  • the vertical direction in FIG. 9 is called the mounting direction of the arc-extinguishing cover 7 .
  • the second hook engaging portion 35 and the first hook engaging portion 36 provided on the front and rear sides of the upper case 3 are engaged perpendicularly to the mounting direction of the arc-extinguishing cover 7. formed as a surface.
  • the cover-side engaging portion 25b of the first cover wall portion 21 arranged on the front side and the cover-side engaging portion 30b of the second cover wall portion 22 arranged on the rear side extend along the mounting direction of the arc-extinguishing cover 7.
  • the cover side engaging portions 25a, 25c to 25f of the first cover wall portion 21 and the cover side engaging portions 30a, 30c to 30 of the second cover wall portion 22 are also arranged in the mounting direction of the arc extinguishing cover 7. are placed along the Second hook portions 26 provided on the cover side engaging portions 25a to 25f of the first cover wall portion 21, and second hook portions 31 provided on the cover side engaging portions 30a to 30f of the second cover wall portion 22. Hook engaging surfaces 26a and 31a perpendicular to the mounting direction of the arc extinguishing cover 7 are formed on the upper surface of the .
  • a first hook portion 32 provided on the cover-side engaging portion 30b of the portion 22 and a first hook portion 32 (see FIG. 6) provided on the cover-side engaging portion 30e are formed to protrude in a triangular cross-sectional shape.
  • the first hook portion 27 of the first cover wall portion 21 engages the first hook engaging portion 36 on the front side of the upper case 3
  • the first hook portion 32 of the second cover wall portion 22 engages the upper case 3 . It engages with the first hook engaging portion 36 on the rear side.
  • the arc-extinguishing cover 7 attached to the upper case 3 is such that the auxiliary-side partition wall 23 and the power-source-side partition walls 24a to 24c of the first cover wall portion 21 are connected to the auxiliary-power-side terminal portion 4d1 and the power-source-side terminal portions 4a1 to 4c1. and the contact portion 6, and the auxiliary load side partition wall 29 and the load side partition walls 29a to 29c of the second cover wall portion 22 separate the contact portion 6 from the auxiliary load side terminal portion 4d2 and the load side terminal portions 4a2 to 4c2.
  • the arc extinguishing chamber 12 is hermetically sealed by partitioning the space and covering the upper part of the contact part 6 with the cover body 20 .
  • the upper case 3 is formed with engagement stabilizing plates 34a-34f. 25a to 25f, and also along the front sides of the cover-side engagement portions 30a to 30f of the second cover wall portion 22. As shown in FIG.
  • a gap is formed between the cover body 20 of the arc-extinguishing cover 7 and the upper portion of the upper case 3, and this gap serves as a gas release hole to release the arc gas in the arc-extinguishing chamber 12 to the outside, thereby extinguishing the arc.
  • the internal pressure of the chamber 12 is reduced to prevent the arc-extinguishing cover 7 from being blown away.
  • first hook portions 27 and 32 of the arc extinguishing cover 7 are engaged with the first hook engaging portions 36 of the upper case 3, and the arc extinguishing cover 7 is attached to the upper case 3 while sealing the arc extinguishing chamber 12.
  • This state is called a first engaged state.
  • the second hook portions 26 and 31 of the arc extinguishing cover 7 are engaged with the second hook engaging portions 35 of the upper case 3, and arc extinguishing is performed with a gap provided between the upper case 3 and the arc extinguishing cover 7.
  • a state in which the cover 7 is attached to the upper case 3 is referred to as a second engaged state.
  • the effects of the electromagnetic contactor 1 of this embodiment will be described.
  • the arc-extinguishing cover 7 in the first engagement state in which the arc-extinguishing cover 7 seals the arc-extinguishing chamber 12 and is mounted on the upper case 3 , the arc-extinguishing cover is attached to the first hook engaging portion 36 provided on the upper case 3 .
  • the first hook portions 27 and 32 provided on 7 are engaged.
  • the engagement of the first hook engaging portion 36 and the first hook portions 27, 32 with weak engaging force is disengaged.
  • the second hook engaging portion 35 and the second hook portions 26 and 31 provided on the arc-extinguishing cover 7 are engaged with each other with a strong engaging force, and the arc-extinguishing cover 7 and the upper case 3 are provided with a gap. Since the mating state is established, the arc gas in the arc extinguishing chamber 12 is released to the outside, and the arc extinguishing cover 7 can be reliably prevented from blowing off from the upper case 3. - ⁇
  • the first hook engaging portion 36 of the upper case 3 and the first hook portions 27, 32 of the arc-extinguishing cover 7 are engaged.
  • the second hook engaging portion 35 is engaged with the second hook portions 26 and 31 of the arc-extinguishing cover 7, and different portions of the arc-extinguishing cover 7 are engaged in the first engaged state and the second engaged state.
  • the engaging portion (the first hook engaging portion 36 and the first hook portions 27, 32) in the first engaging state is damaged due to, for example, a sudden increase in the internal pressure of the arc-extinguishing chamber 12, the second engaging portion will not be engaged.
  • the engaging force in the joined state does not decrease.
  • the cover-side engagement portions 25a to 25f formed in the first cover wall portion 21 of the arc-extinguishing cover 7 are largely displaced to the rear side.
  • the engagement stabilizing plates 34a to 34f provided on the upper case 3 move the cover side engaging portions 25a to 25f, A large displacement is regulated by contacting 30a to 30f. Therefore, the engagement of the second hook engaging portion 35 and the second hook portions 26, 31 can always be stably performed when shifting from the first engaged state to the second engaged state.
  • Electromagnetic contactor 1 2 Lower case 3 Upper case (case) 4a1, 4b1, 4c1 Main circuit power supply side terminal 4a2, 4b2, 4c2 Main circuit load side terminal 4d1 Auxiliary power supply side terminal 4d2 Auxiliary load side terminal 4e Coil terminal 6
  • Contact 7 Arc extinguishing cover 8
  • Terminal cover 10a 10b
  • Case partition wall 11c Auxiliary circuit case wall 12
  • Cover body 21 first cover wall portion 22 second cover wall portion 23 auxiliary side partition walls 24a, 24b, 24c power source side partition walls 25a to 25f cover side engaging portion 26 second hook portion (second engaging portion) 26a hook engaging surface (second engaging surface) 27 first hook portion (first engaging portion) 28 auxiliary side partition walls 29a, 29b,

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)

Abstract

This electromagnetic contactor comprises: a case (3) that houses a contact portion (6) having a movable contact (15a), (15b) and a fixed contact (13a), (13b) in an arc-extinguishing chamber (12); and an arc-extinguishing cover (7) that covers the arc-extinguishing chamber and is attached to the case (3). In the arc-extinguishing cover, a first engagement portion (27), (32) and a second engagement portion (26), (31) are formed to be separated from each other in the direction of attachment to the case. In the case, a third engagement portion (36) and a fourth engagement portion (35) are formed. The arc-extinguishing cover is attached to the case in a first engagement state in which the first engagement portion and the third engagement portion engage with each other. Further, the arc-extinguishing cover is attached to the case with a gap provided therebetween in a second engagement state in which the second engagement portion and the fourth engagement portion engage with each other.

Description

電磁接触器magnetic contactor
　本発明は、電磁接触器に係わり、特に消弧カバーを保持する構造に関する。 The present invention relates to an electromagnetic contactor, and more particularly to a structure for holding an arc extinguishing cover.
　電磁接触器は、絶縁性を有する合成樹脂材で形成した下ケース及び上ケースを備えており、上ケースには、接点をそれぞれ有する端子部が固定されているとともに、上ケース内の消弧室に可動接点及び固定接点を備えた接点部が収納されている。下ケース内には、接点部を駆動させる電磁石が収納されている。そして、上ケースには消弧室内の接点部を覆う消弧カバーが装着されている。 The magnetic contactor is provided with a lower case and an upper case made of insulating synthetic resin material, and the upper case is fixed with terminals each having a contact, and an arc extinguishing chamber in the upper case. A contact portion having a movable contact and a fixed contact is housed in the housing. An electromagnet for driving the contact portion is housed in the lower case. An arc-extinguishing cover is attached to the upper case to cover the contact portion in the arc-extinguishing chamber.
　短絡事故などで電磁接触器の接点部に異常な大電流が流れると、発生したアークガスによる消弧室の内圧上昇によって消弧カバーが吹き飛ぶおそれがある。そのため、例えば特許文献１の電磁接触器は、上ケースと消弧カバーの一方に第１係合部及び第２係合部を形成し、他方に第１係合部及び第２係合部に係合する第３係合部を形成し、第１係合部と第３係合部とを係合させる第１係合状態とすることで消弧カバーを上ケースに装着し、第２係合部と第３係合部を係合させる第２係合状態とすることで消弧カバーと上ケースとの間に隙間を形成し、発生したアークガスを外部に放出させて消弧室の内圧を減少させるようにしている。 If an abnormally large current flows through the contacts of the magnetic contactor due to a short-circuit accident, etc., the generated arc gas may increase the internal pressure of the arc extinguishing chamber and blow off the arc extinguishing cover. Therefore, for example, the electromagnetic contactor of Patent Document 1 has a first engaging portion and a second engaging portion formed on one of the upper case and the arc extinguishing cover, and the first engaging portion and the second engaging portion on the other. By forming a third engaging portion for engagement and establishing a first engaging state in which the first engaging portion and the third engaging portion are engaged, the arc-extinguishing cover is attached to the upper case, and the second engaging portion is engaged. A gap is formed between the arc-extinguishing cover and the upper case by setting the second engagement state in which the joining portion and the third engaging portion are engaged, and the generated arc gas is released to the outside, resulting in the internal pressure of the arc-extinguishing chamber. are trying to reduce
特開２０２１－１１４５０号公報Japanese Patent Application Laid-Open No. 2021-11450
　しかし、特許文献１の電磁接触器は、第１係合状態から第２係合状態に移行する際に、第３係合部が損傷してしまうと、損傷した第３係合部と第２係合部との係合力が低くなり、第２係合状態を保持できない消弧カバーが上ケースから吹き飛ぶおそれがある。
　そこで、本発明は、第１係合状態から第２係合状態に移行する際のケースに対する消弧カバーの係合力の低下を防止することで、消弧室に発生したアークガスを外部に放出しつつ消弧カバーの吹き飛びを確実に防止することができる電磁接触器を提供することを目的としている。 However, in the electromagnetic contactor of Patent Document 1, when the third engaging portion is damaged when shifting from the first engaging state to the second engaging state, the damaged third engaging portion and the second engaging portion The force of engagement with the engaging portion is reduced, and the arc-extinguishing cover that cannot maintain the second engaged state may be blown off from the upper case.
Accordingly, the present invention prevents the engagement force of the arc-extinguishing cover with respect to the case from decreasing when shifting from the first engaged state to the second engaged state, thereby releasing the arc gas generated in the arc-extinguishing chamber to the outside. To provide an electromagnetic contactor capable of reliably preventing an arc-extinguishing cover from being blown off.
　上記目的を達成するために、本発明の一態様に係る電磁接触器は、可動接点と固定接点とを有する接点部を消弧室に収納したケースと、消弧室を覆ってケースに装着される消弧カバーと、を備えた電磁接触器において、消弧カバーは、ケースに対する装着方向に離間して第１係合部及び第２係合部が形成され、ケースは、第３係合部及び第４係合部が形成されており、第１係合部及び第３係合部が係合した第１係合状態で、消弧カバーが消弧室を密閉して前記ケースに装着され、第２係合部及び第４係合部が係合した第２係合状態で、消弧カバーとケースの間に隙間を設けた状態でケースに消弧カバーが保持されるようにした。 To achieve the above object, an electromagnetic contactor according to an aspect of the present invention includes a case in which a contact portion having a movable contact and a fixed contact is housed in an arc-extinguishing chamber, and a case that covers the arc-extinguishing chamber. The arc extinguishing cover is formed with a first engaging portion and a second engaging portion spaced apart in the mounting direction with respect to the case, and the case has a third engaging portion and a fourth engaging portion are formed, and in the first engaging state in which the first engaging portion and the third engaging portion are engaged, the arc-extinguishing cover is attached to the case so as to seal the arc-extinguishing chamber. In the second engagement state in which the second engaging portion and the fourth engaging portion are engaged, the arc-extinguishing cover is held by the case with a gap provided between the arc-extinguishing cover and the case.
　本発明に係る一態様の電磁接触器によれば、消弧カバーがケースに装着されている第１係合状態から消弧カバーとケースの間に隙間を設けた第２係合状態に移行する際に、ケースに対する消弧カバーの係合力の低下を確実に防止することで、消弧室に発生したアークガスを外部に放出しつつ消弧カバーの吹き飛びを確実に防止することができる。 According to the electromagnetic contactor of one aspect of the present invention, the first engagement state in which the arc-extinguishing cover is attached to the case is shifted to the second engagement state in which a gap is provided between the arc-extinguishing cover and the case. At this time, by reliably preventing the engagement force of the arc-extinguishing cover with respect to the case from being lowered, the blow-off of the arc-extinguishing cover can be reliably prevented while releasing the arc gas generated in the arc-extinguishing chamber to the outside.
本発明に係る１実施形態の電磁接触器を示す斜視図である。It is a perspective view showing an electromagnetic contactor of one embodiment concerning the present invention. 電磁接触器を消弧カバー側から示した図である。It is the figure which showed the electromagnetic contactor from the arc-extinguishing cover side. 電磁接触器の上ケースから消弧カバーを外した状態を示す図である。It is a figure which shows the state which removed the arc-extinguishing cover from the upper case of the electromagnetic contactor. 図２におけるIV－IV線矢視の要部断面図である。FIG. 3 is a cross-sectional view of a main part taken along line IV-IV in FIG. 2; 消弧カバーを前側から示した図である。It is the figure which showed the arc-extinguishing cover from the front side. 消弧カバーを後側から示した図である。It is the figure which showed the arc-extinguishing cover from the back side. 消弧カバーを外した上ケース側の形状を示す斜視図である。It is a perspective view which shows the shape of the upper case side which removed the arc-extinguishing cover. 消弧カバーを外した上ケース側の形状を前側から示した図である。It is the figure which showed the shape of the upper case side which removed the arc-extinguishing cover from the front side. 図２におけるX－X線矢視の要部断面図であり、消弧カバーが上ケースに装着されている第１係合状態を示す図である。FIG. 3 is a cross-sectional view of essential parts taken along the line XX in FIG. 2, showing a first engagement state in which the arc-extinguishing cover is attached to the upper case; 消弧カバーが上ケースに隙間を設けて装着されている第２係合状態を示す要部断面図である。FIG. 10 is a cross-sectional view of a main part showing a second engagement state in which the arc-extinguishing cover is attached to the upper case with a gap;
　次に、図面を参照して、本発明に係る実施形態を説明する。以下の図面の記載において、同一又は類似の部分には同一又は類似の符号を付している。ただし、図面は模式的なものであり、厚みと平面寸法との関係、各層の厚みの比率等は現実のものとは異なることに留意すべきである。したがって、具体的な厚みや寸法は以下の説明を参酌して判断すべきものである。また、図面相互間においても互いの寸法の関係や比率が異なる部分が含まれていることはもちろんである。 Next, embodiments according to the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic, and the relationship between thickness and planar dimension, the ratio of thickness of each layer, and the like are different from the actual ones. Therefore, specific thicknesses and dimensions should be determined with reference to the following description. In addition, it is a matter of course that there are portions with different dimensional relationships and ratios between the drawings.
　また、以下に示す実施形態は、本発明の技術的思想を具体化するための装置や方法を例示するものであって、本発明の技術的思想は、構成部品の材質、形状、構造、配置等を下記のものに特定するものでない。本発明の技術的思想は、特許請求の範囲に記載された請求項が規定する技術的範囲内において、種々の変更を加えることができる。
　なお、以下の説明で記載されている「左」、「右」、「前」、「後」、「上」及び「下」の用語は、図１で示す方向を参照して用いられている。 Further, the embodiments shown below are examples of devices and methods for embodying the technical idea of the present invention. etc. are not specified below. Various modifications can be made to the technical idea of the present invention within the technical scope defined by the claims.
The terms "left", "right", "front", "rear", "top" and "bottom" used in the following description are used with reference to the directions shown in FIG. .
　図１及び図２に示すように、本発明に係る１実施形態を示す電磁接触器１は、上下に分割され、絶縁性を有する合成樹脂材で形成された下ケース２及び上ケース３を備えている。上ケース３には、主回路の電源側端子部４ａ１～４ｃ１、主回路の負荷側端子部４ａ２～４ｃ２、補助電源側端子部４ｄ１，補助負荷側端子部４ｄ２が配置されているともに、後述する消弧室１２を密閉する消弧カバー７が装着されている。下ケース２内には、後述する接点部６を駆動させる電磁石（不図示）が収納されているともに、下ケース２に電磁石用の一対のコイル端子４ｅが固定されている。 As shown in FIGS. 1 and 2, an electromagnetic contactor 1 showing an embodiment according to the present invention is divided into upper and lower parts, and is provided with a lower case 2 and an upper case 3 which are formed of an insulating synthetic resin material. ing. The upper case 3 is provided with main circuit power supply side terminal portions 4a1 to 4c1, main circuit load side terminal portions 4a2 to 4c2, auxiliary power supply side terminal portion 4d1, and auxiliary load side terminal portion 4d2, which will be described later. An arc-extinguishing cover 7 for sealing the arc-extinguishing chamber 12 is attached. An electromagnet (not shown) for driving a contact portion 6, which will be described later, is housed in the lower case 2, and a pair of coil terminals 4e for the electromagnet are fixed to the lower case 2. As shown in FIG.
　図３は、電磁接触器１の上ケース３から消弧カバー７を取り外した状態を示すものである。上ケース３には、左右方向に離間して前後方向に連続して延在する一対の主回路用ケース壁１０ａ，１０ｂが形成され、主回路用ケース壁１０ａ，１０ｂの間を平行に仕切り、互いに前後方向に離間して２対のケース隔壁１１ａ１，１１ａ２及び１１ｂ１，１１ｂ２が形成されている。また、主回路用ケース壁１０ａの外側に平行に補助回路用ケース壁１１ｃが形成されている。そして、一対の主回路用ケース壁１０ａ，１０ｂとケース隔壁１１ａ１，１１ａ１及び１１ｂ１，１１ｂ２の間に主回路の電源側端子部４ａ１～４ｃ１、主回路の負荷側端子部４ａ２～４ｃ２が配置され、主回路用ケース壁１０ａと補助回路用ケース壁１１ｃとの間に補助電源側端子部４ｄ１及び補助負荷側端子部４ｄ２が配置されている。
　そして、上ケース３の一対の主回路用ケース壁１０ａ，１０ｂ及びケース隔壁１１ａ，１１ｂで囲まれた中央部に接点部６が配置されており、上ケース３に消弧カバー７を装着することで、図４に示すように、密閉された消弧室１２が設けられている。 FIG. 3 shows a state in which the arc extinguishing cover 7 is removed from the upper case 3 of the electromagnetic contactor 1. As shown in FIG. The upper case 3 is formed with a pair of main circuit case walls 10a and 10b that are spaced apart in the left-right direction and continuously extend in the front-rear direction, partitioning the main circuit case walls 10a and 10b in parallel, Two pairs of case partition walls 11a1, 11a2 and 11b1, 11b2 are formed spaced apart from each other in the front-rear direction. Further, an auxiliary circuit case wall 11c is formed in parallel with the outside of the main circuit case wall 10a. Between the pair of main circuit case walls 10a, 10b and the case partition walls 11a1, 11a1 and 11b1, 11b2, the main circuit power supply side terminal portions 4a1 to 4c1 and the main circuit load side terminal portions 4a2 to 4c2 are arranged, An auxiliary power supply side terminal portion 4d1 and an auxiliary load side terminal portion 4d2 are arranged between the main circuit case wall 10a and the auxiliary circuit case wall 11c.
A contact portion 6 is arranged in a central portion of the upper case 3 surrounded by a pair of main circuit case walls 10a and 10b and case partition walls 11a and 11b. A sealed arc extinguishing chamber 12 is provided as shown in FIG.
　接点部６は、図４に示すように、主回路の電源側端子部４ａ１～４ｃ１の固定接点１３ａ（図４では主回路の電源側端子部４ｂ１の固定接点１３ａのみを示す）と、主回路の負荷側端子部４ａ２～４ｃ２の固定接点１３ｂ（図４では、負荷側端子部４ｂ２の固定接点１３ｂのみを示す）と、接点支え１４に支持されて固定接点１３ａ，１３ｂに可動接点１５ａ，１５ｂが接離する可動接触子１５と、を備えている。そして、接点支え１４に、電磁石を構成する可動鉄心１６が連結しており、電磁石を構成する励磁コイル（不図示）が励磁状態になると、可動鉄心１６とともに接点支え１４が図４の下方に移動して可動接点１５ａ，１５ｂが固定接点１３ａ、１３ｂに接触した閉極状態となる。 As shown in FIG. 4, the contact portion 6 includes fixed contacts 13a of the power supply side terminal portions 4a1 to 4c1 of the main circuit (only the fixed contact 13a of the power supply side terminal portion 4b1 of the main circuit is shown in FIG. 4) and the main circuit. The fixed contacts 13b of the load-side terminal portions 4a2 to 4c2 (only the fixed contact 13b of the load-side terminal portion 4b2 is shown in FIG. 4) and the fixed contacts 13a and 13b supported by the contact support 14 are connected to the movable contacts 15a and 15b. and a movable contactor 15 that contacts and separates. A movable iron core 16 constituting an electromagnet is connected to the contact support 14. When an exciting coil (not shown) constituting the electromagnet is excited, the contact support 14 moves downward in FIG. Then, the movable contacts 15a and 15b come into contact with the fixed contacts 13a and 13b, resulting in a closed state.
　消弧カバー７は、図３に示すように、板形状のカバー本体２０と、このカバー本体２０の前後方向の縁部から互いに対向して形成されている第1カバー壁部２１及び第２カバー壁部２２と、を備えている。ここで、図５は、図３に示した上ケース３に装着する前の消弧カバー７を前方から見た図を示し、図６は、図３に示した消弧カバー７を後方から見た図を示している。 As shown in FIG. 3, the arc-extinguishing cover 7 includes a plate-shaped cover body 20, and a first cover wall portion 21 and a second cover wall portion 21 and a second cover wall portion 21 and a second cover wall portion 21 which are formed facing each other from the front-rear edge of the cover body 20, as shown in FIG. a wall portion 22; 5 is a front view of the arc-extinguishing cover 7 before being attached to the upper case 3 shown in FIG. 3, and FIG. 6 is a rear view of the arc-extinguishing cover 7 shown in FIG. shows a diagram.
　第１カバー壁部２１は、図５に示すように、互いに左右方向に離れて補助側仕切り壁２３及び電源側仕切り壁２４ａ～２４ｃが形成され、電源側仕切り壁２４ａ～２４ｃの左右方向の両縁部に、電源側仕切り壁２４ａ～２４ｃの外面より内側の位置から左右方向の外方に突出して上下方向に延在するカバー側係合部２５ａ～２５ｆが形成されている。カバー側係合部２５ａ～２５ｆの各々のカバー本体２０から離間している下方位置に、第２フック部２６が形成されている。そして、電源側仕切り壁２４ａの左側縁部に形成されているカバー側係合部２５ｂには、第２フック部２６よりカバー本体２０に近い上方位置に、第１フック部２７が形成されている。また、電源側仕切り壁２４ｃの右側縁部に形成されているカバー側係合部２５ｅにも、第２フック部２６よりカバー本体２０に近い上方位置に、第１フック部２７が形成されている。 As shown in FIG. 5, the first cover wall portion 21 has an auxiliary partition wall 23 and power source partition walls 24a to 24c separated from each other in the left and right direction. Cover-side engagement portions 25a-25f are formed on the edges of the cover-side engaging portions 25a-25f projecting outward in the left-right direction from positions inside the outer surfaces of the power supply-side partition walls 24a-24c and extending in the up-down direction. A second hook portion 26 is formed at a lower position apart from the cover main body 20 of each of the cover side engaging portions 25a to 25f. A first hook portion 27 is formed at an upper position closer to the cover main body 20 than the second hook portion 26 to the cover side engaging portion 25b formed on the left edge portion of the power supply side partition wall 24a. . Also, the cover-side engaging portion 25e formed on the right edge of the power source-side partition wall 24c is also formed with a first hook portion 27 at an upper position closer to the cover main body 20 than the second hook portion 26 is. .
　また、第２カバー壁部２２は、図６に示すように、互いに左右方向に離れて補助側仕切り壁２８及び負荷側仕切り壁２９ａ～２９ｃが形成され、負荷側仕切り壁２９ａ～２９ｃの左右方向の両縁部に、負荷側仕切り壁２９ａ～２９ｃの外面より内側の位置から左右方向の外方に突出して上下方向に延在するカバー側係合部３０ａ～３０ｆが形成されている。カバー側係合部３０ａ～３０ｆの各々のカバー本体２０から離間している下方位置には、第２フック部３１が形成されている。そして、負荷側仕切り壁２９ａの左側縁部に形成されているカバー側係合部３０ｂには、第２フック部３１よりカバー本体２０に近い上方位置に、第１フック部３２が形成されている。また、負荷側仕切り壁２９ｃの右側縁部に形成されているカバー側係合部３０ｅにも、第２フック部３１よりカバー本体２０に近い上方位置に、第１フック部３２が形成されている。 As shown in FIG. 6, the second cover wall portion 22 has an auxiliary partition wall 28 and load-side partition walls 29a to 29c separated from each other in the left-right direction. Cover-side engaging portions 30a-30f are formed on both edges of the load-side partition walls 29a-29c so as to protrude outward in the left-right direction and extend in the up-down direction. A second hook portion 31 is formed at a lower position apart from the cover main body 20 of each of the cover side engaging portions 30a to 30f. A first hook portion 32 is formed at an upper position closer to the cover main body 20 than the second hook portion 31 to the cover side engaging portion 30b formed on the left edge portion of the load side partition wall 29a. . A first hook portion 32 is also formed on the cover-side engaging portion 30e formed on the right edge portion of the load-side partition wall 29c at an upper position closer to the cover main body 20 than the second hook portion 31. .
　一方、図７に示すように、上ケース３の一対の主回路用ケース壁１０ａ，１０ｂ及びケース隔壁１１ａ１，１１ａ２の内側（接点部６に近い側）に、カバー側係合部３３ａ～３３ｄが形成されている。カバー側係合部３３ａは主回路用ケース壁１０ａの一部から連続して左右方向に延在する板状部位であり、カバー側係合部３３ｄも、主回路用ケース壁１０ｂの一部から連続して左右方向に延在する板状部位である。カバー側係合部３３ｂ，３３ｃは、ケース隔壁１１ａ１，１１ａ２の一部から連続して左右方向に延在するＣ字形状部材である。これらカバー側係合部３３ａ～３３ｄに対して後方に離間した位置に、係合安定板３４ａ～３４ｆが平行に形成されている。 On the other hand, as shown in FIG. 7, cover side engaging portions 33a to 33d are provided inside the pair of main circuit case walls 10a and 10b and case partition walls 11a1 and 11a2 of the upper case 3 (on the side close to the contact portion 6). formed. The cover-side engaging portion 33a is a plate-like portion extending in the left-right direction continuously from a portion of the main circuit case wall 10a, and the cover-side engaging portion 33d also extends from a portion of the main circuit case wall 10b. It is a plate-like portion continuously extending in the left-right direction. The cover- side engaging portions 33b and 33c are C-shaped members extending in the left-right direction continuously from portions of the case partition walls 11a1 and 11a2. Engagement stabilizing plates 34a to 34f are formed in parallel at positions spaced rearward from the cover-side engagement portions 33a to 33d.
　そして、図８に示すように、カバー側係合部３３ａ～３３ｄの最も下方向を向く面が、前述した消弧カバー７の第１カバー壁部２１のカバー側係合部２５ａ～２５ｆの各々に設けた第２フック部２６に係合する第２フック係合部３５とされている。また、カバー側係合部３３ｂ，３３ｃのＣ字形状切り欠き部の下方向を向く面が、第１カバー壁部２１のカバー側係合部２５ｂ、２５ｅに設けた第１フック部２７に係合する第１フック係合部３６とされている。 As shown in FIG. 8, the surfaces of the cover-side engaging portions 33a to 33d that face the most downward direction correspond to the cover-side engaging portions 25a to 25f of the first cover wall portion 21 of the arc-extinguishing cover 7, respectively. It is a second hook engaging portion 35 that engages with the second hook portion 26 provided in the . Further, the downward facing surfaces of the C-shaped notches of the cover- side engaging portions 33b and 33c are engaged with the first hook portions 27 provided on the cover- side engaging portions 25b and 25e of the first cover wall portion 21. It is a first hook engaging portion 36 that fits.
　また、図示しないが、上ケース３の一対の主回路用ケース壁１０ａ，１０ｂ及びケース隔壁１１ｂ１，１１ｂ２の内側（接点部６に近い側）にも、同一形状のカバー側係合部３３ａ～３３ｄが形成されている。また、カバー側係合部３３ａ～３３ｄには、消弧カバー７の第２カバー壁部２２のカバー側係合部３０ａ～３０ｆの各々に設けた第２フック部３１に係合する第２フック係合部３５が形成されている。また、第２カバー壁部２２のカバー側係合部３０ｂ、３０ｅに設けた第１フック部３２に係合する第１フック係合部３６が形成されている。そして、カバー側係合部３３ａ～３３ｄに対して前方に離間した位置に、係合安定板３４ａ～３４ｆが平行に形成されている。 Further, although not shown, cover-side engaging portions 33a to 33d having the same shape are also provided inside the pair of main circuit case walls 10a and 10b and the case partition walls 11b1 and 11b2 of the upper case 3 (on the side near the contact portion 6). is formed. Further, the cover side engaging portions 33a to 33d are provided with second hooks that engage with the second hook portions 31 provided on the respective cover side engaging portions 30a to 30f of the second cover wall portion 22 of the arc extinguishing cover 7. An engaging portion 35 is formed. A first hook engaging portion 36 that engages with the first hook portion 32 provided on the cover side engaging portions 30b and 30e of the second cover wall portion 22 is formed. Engagement stabilizing plates 34a to 34f are formed in parallel at positions spaced forward from the cover-side engagement portions 33a to 33d.
　次に、図９は、図２のX－X線矢視要部断面図であり、消弧カバー７を上ケース３に装着した電磁接触器１を示す図である。なお、図９における上下方向を、消弧カバー７の装着方向と称する。
　図９に示すように、上ケース３の前側及び後側に設けている第２フック係合部３５及び第１フック係合部３６は、消弧カバー７の装着方向に対して直交する係合面として形成されている。 Next, FIG. 9 is a cross-sectional view of the main part taken along line XX of FIG. In addition, the vertical direction in FIG. 9 is called the mounting direction of the arc-extinguishing cover 7 .
As shown in FIG. 9, the second hook engaging portion 35 and the first hook engaging portion 36 provided on the front and rear sides of the upper case 3 are engaged perpendicularly to the mounting direction of the arc-extinguishing cover 7. formed as a surface.
　図９では、前側に配置した第１カバー壁部２１のカバー側係合部２５ｂ、後側に配置した第２カバー壁部２２のカバー側係合部３０ｂが消弧カバー７の装着方向に沿って配置されているが、第１カバー壁部２１のカバー側係合部２５ａ、２５ｃ～２５ｆ、第２カバー壁部２２のカバー側係合部３０ａ、３０ｃ～３０も消弧カバー７の装着方向に沿って配置されている。そして、第１カバー壁部２１のカバー側係合部２５ａ～２５ｆに設けた第２フック部２６と、第２カバー壁部２２のカバー側係合部３０ａ～３０ｆに設けた第２フック部３１の上面には、消弧カバー７の装着方向に対して直交するフック係合面２６ａ、３１ａが形成されている。 In FIG. 9, the cover-side engaging portion 25b of the first cover wall portion 21 arranged on the front side and the cover-side engaging portion 30b of the second cover wall portion 22 arranged on the rear side extend along the mounting direction of the arc-extinguishing cover 7. In FIG. However, the cover side engaging portions 25a, 25c to 25f of the first cover wall portion 21 and the cover side engaging portions 30a, 30c to 30 of the second cover wall portion 22 are also arranged in the mounting direction of the arc extinguishing cover 7. are placed along the Second hook portions 26 provided on the cover side engaging portions 25a to 25f of the first cover wall portion 21, and second hook portions 31 provided on the cover side engaging portions 30a to 30f of the second cover wall portion 22. Hook engaging surfaces 26a and 31a perpendicular to the mounting direction of the arc extinguishing cover 7 are formed on the upper surface of the .
　また、第１カバー壁部２１のカバー側係合部２５ｂに設けた第１フック部２７と、カバー側係合部２５ｅに設けた第１フック部２７（図５参照）と、第２カバー壁部２２のカバー側係合部３０ｂに設けた第１フック部３２と、カバー側係合部３０ｅに設けた第１フック部３２（図６参照）は、断面三角形状に突出して形成されている。
　そして、第１カバー壁部２１の第１フック部２７が上ケース３の前側の第１フック係合部３６に係合し、第２カバー壁部２２の第１フック部３２が上ケース３の後側の第１フック係合部３６に係合する。 Also, the first hook portion 27 provided on the cover-side engagement portion 25b of the first cover wall portion 21, the first hook portion 27 (see FIG. 5) provided on the cover-side engagement portion 25e, and the second cover wall A first hook portion 32 provided on the cover-side engaging portion 30b of the portion 22 and a first hook portion 32 (see FIG. 6) provided on the cover-side engaging portion 30e are formed to protrude in a triangular cross-sectional shape. .
The first hook portion 27 of the first cover wall portion 21 engages the first hook engaging portion 36 on the front side of the upper case 3 , and the first hook portion 32 of the second cover wall portion 22 engages the upper case 3 . It engages with the first hook engaging portion 36 on the rear side.
　そして、上ケース３に装着した消弧カバー７は、第１カバー壁部２１の補助側仕切り壁２３及び電源側仕切り壁２４ａ～２４ｃが、補助電源側端子部４ｄ１及び電源側端子部４ａ１～４ｃ１と接点部６の間を仕切り、第２カバー壁部２２の補助側仕切り壁２９及び負荷側仕切り壁２９ａ～２９ｃが、補助負荷側端子部４ｄ２及び負荷側端子部４ａ２～４ｃ２と接点部６の間を仕切り、カバー本体２０が接点部６の上部を覆うことで消弧室１２を密閉する。また、図７で示したように、上ケース３に係合安定板３４ａ～３４ｆが形成されているが、これら係合安定板３４ａ～３４ｆは、第１カバー壁部２１のカバー側係合部２５ａ～２５ｆの後側近傍に沿って配置され、第２カバー壁部２２のカバー側係合部３０ａ～３０ｆの前側近傍にも沿って配置される。 The arc-extinguishing cover 7 attached to the upper case 3 is such that the auxiliary-side partition wall 23 and the power-source-side partition walls 24a to 24c of the first cover wall portion 21 are connected to the auxiliary-power-side terminal portion 4d1 and the power-source-side terminal portions 4a1 to 4c1. and the contact portion 6, and the auxiliary load side partition wall 29 and the load side partition walls 29a to 29c of the second cover wall portion 22 separate the contact portion 6 from the auxiliary load side terminal portion 4d2 and the load side terminal portions 4a2 to 4c2. The arc extinguishing chamber 12 is hermetically sealed by partitioning the space and covering the upper part of the contact part 6 with the cover body 20 . Further, as shown in FIG. 7, the upper case 3 is formed with engagement stabilizing plates 34a-34f. 25a to 25f, and also along the front sides of the cover-side engagement portions 30a to 30f of the second cover wall portion 22. As shown in FIG.
　そして、電磁接触器１は、短絡事故などで接点部６に異常な大電流が流れ、発生したアークガスにより消弧室１２の内圧が過大に上昇することで、消弧カバー７が上ケース３から離脱して浮き上がろうとする。
　ここで、消弧室１２の内圧が過大に上昇すると、第１カバー壁部２１のカバー側係合部２５ｂ、２５ｅが後側に弾性変形し、第２カバー壁部２２のカバー側係合部３０ｂ、３０ｅが前側に弾性変形することで、上ケース３の前側の第１フック係合部３６と第１フック部２７との係合状態が外れ、上ケース３の後側の第１フック係合部３６と第１フック部３２との係合状態が外れる。 In the magnetic contactor 1, an abnormally large current flows through the contact portion 6 due to a short circuit accident or the like, and the generated arc gas causes the internal pressure of the arc extinguishing chamber 12 to rise excessively. Release and try to float.
Here, when the internal pressure of the arc-extinguishing chamber 12 rises excessively, the cover- side engaging portions 25b and 25e of the first cover wall portion 21 elastically deform rearward, and the cover-side engaging portions of the second cover wall portion 22 By elastically deforming 30b and 30e forward, the first hook engaging portion 36 on the front side of the upper case 3 and the first hook portion 27 are disengaged, and the first hook engaging portion on the rear side of the upper case 3 is released. The joint portion 36 and the first hook portion 32 are disengaged.
　そして、上ケース３に対して消弧カバー７が浮き上がることで、図１０に示すように、第１カバー壁部２１の６箇所の第２フック部２６のフック係合面２６ａが、上ケース３の６箇所の前側の第２フック係合部３５に当接し、第２カバー壁部２２の６箇所の第２フック部３１のフック係合面３１ａが、上ケース３の６箇所の後側の第２フック係合部３５に当接し、第２フック部２６，３１及び第２フック係合部３５の係合が維持される。これにより、消弧カバー７のカバー本体２０と上ケース３の上部との間に隙間が形成され、この隙間がガス抜き穴となって消弧室１２内のアークガスが外部に放出され、消弧室１２の内圧が減少して消弧カバー７の吹き飛びが防止される。 As the arc extinguishing cover 7 is lifted from the upper case 3, the hook engaging surfaces 26a of the second hook portions 26 at the six positions of the first cover wall portion 21 move toward the upper case 3 as shown in FIG. , and the hook engaging surfaces 31a of the second hook portions 31 of the second cover wall portion 22 contact the six rear second hook engaging portions 35 of the upper case 3. It abuts on the second hook engaging portion 35, and the engagement between the second hook portions 26, 31 and the second hook engaging portion 35 is maintained. As a result, a gap is formed between the cover body 20 of the arc-extinguishing cover 7 and the upper portion of the upper case 3, and this gap serves as a gas release hole to release the arc gas in the arc-extinguishing chamber 12 to the outside, thereby extinguishing the arc. The internal pressure of the chamber 12 is reduced to prevent the arc-extinguishing cover 7 from being blown away.
　ここで、上ケース３の第１フック係合部３６に消弧カバー７の第１フック部２７，３２が係合し、消弧カバー７が消弧室１２を密閉して上ケース３に装着されている状態を、第１係合状態と称する。また、上ケース３の第２フック係合部３５に消弧カバー７の第２フック部２６，３１が係合し、上ケース３と消弧カバー７の間に隙間を設けた状態で消弧カバー７が上ケース３に装着されている状態を、第２係合状態と称する。 Here, the first hook portions 27 and 32 of the arc extinguishing cover 7 are engaged with the first hook engaging portions 36 of the upper case 3, and the arc extinguishing cover 7 is attached to the upper case 3 while sealing the arc extinguishing chamber 12. This state is called a first engaged state. Also, the second hook portions 26 and 31 of the arc extinguishing cover 7 are engaged with the second hook engaging portions 35 of the upper case 3, and arc extinguishing is performed with a gap provided between the upper case 3 and the arc extinguishing cover 7. A state in which the cover 7 is attached to the upper case 3 is referred to as a second engaged state.
　次に、本実施形態の電磁接触器１の作用効果について説明する。
　本実施形態は、消弧カバー７が消弧室１２を密閉して上ケース３に装着されている第１係合状態では、上ケース３に設けた第１フック係合部３６に消弧カバー７に設けた第１フック部２７，３２が係合している。そして、アークガスにより消弧室１２の内圧が過大に上昇した際には、係合力が弱い第１フック係合部３６及び第１フック部２７，３２の係合が外れ、上ケース３に設けた第２フック係合部３５と消弧カバー７に設けた第２フック部２６，３１とが強い係合力で係合し、消弧カバー７と上ケース３の間に隙間を設けた第２係合状態とするので、消弧室１２内のアークガスを外部に放出し、上ケース３から消弧カバー７が吹き飛ぶのを確実に防止することができる。 Next, the effects of the electromagnetic contactor 1 of this embodiment will be described.
In this embodiment, in the first engagement state in which the arc-extinguishing cover 7 seals the arc-extinguishing chamber 12 and is mounted on the upper case 3 , the arc-extinguishing cover is attached to the first hook engaging portion 36 provided on the upper case 3 . The first hook portions 27 and 32 provided on 7 are engaged. When the internal pressure of the arc extinguishing chamber 12 is excessively increased by the arc gas, the engagement of the first hook engaging portion 36 and the first hook portions 27, 32 with weak engaging force is disengaged. The second hook engaging portion 35 and the second hook portions 26 and 31 provided on the arc-extinguishing cover 7 are engaged with each other with a strong engaging force, and the arc-extinguishing cover 7 and the upper case 3 are provided with a gap. Since the mating state is established, the arc gas in the arc extinguishing chamber 12 is released to the outside, and the arc extinguishing cover 7 can be reliably prevented from blowing off from the upper case 3. - 特許庁
　また、第１係合状態では、上ケース３の第１フック係合部３６と消弧カバー７の第１フック部２７，３２とが係合し、第２係合状態では、上ケース３の第２フック係合部３５と消弧カバー７の第２フック部２６，３１とが係合し、第１係合状態と第２係合状態では、消弧カバー７異なる部位が係合している。このため、従来技術のような課題、消弧カバー７、或いは上ケース３に、第１係合状態及び第２係合状態において同一の係合部を使用することで、第１係合状態から第２係合状態に移行する際に係合部が損傷し、第２係合状態を保持できない、という課題が発生しない。したがって、例えば消弧室１２の内圧の急上昇により第１係合状態の係合部（第１フック係合部３６、第１フック部２７，３２）の一部が損傷しても、第２係合状態の係合力が低下することがない。 In the first engaged state, the first hook engaging portion 36 of the upper case 3 and the first hook portions 27, 32 of the arc-extinguishing cover 7 are engaged. The second hook engaging portion 35 is engaged with the second hook portions 26 and 31 of the arc-extinguishing cover 7, and different portions of the arc-extinguishing cover 7 are engaged in the first engaged state and the second engaged state. there is Therefore, by using the same engaging portion for the arc-extinguishing cover 7 or the upper case 3 in the first engaging state and the second engaging state, the problem of the prior art is solved. There is no problem that the second engagement state cannot be maintained due to damage to the engagement portion when shifting to the second engagement state. Therefore, even if a part of the engaging portion (the first hook engaging portion 36 and the first hook portions 27, 32) in the first engaging state is damaged due to, for example, a sudden increase in the internal pressure of the arc-extinguishing chamber 12, the second engaging portion will not be engaged. The engaging force in the joined state does not decrease.
　また、第１係合状態から第２係合状態に移行する際に、消弧カバー７の第１カバー壁部２１に形成したカバー側係合部２５ａ～２５ｆが後側に大きく変位し、第２カバー壁部２２に形成したカバー側係合部３０ａ～３０ｆが後側に大きく変位しようとすると、上ケース３に設けた係合安定板３４ａ～３４ｆが、カバー側係合部２５ａ～２５ｆ、３０ａ～３０ｆに接触することで大きな変位を規制する。このため、第１係合状態から第２係合状態に移行する際の第２フック係合部３５及び第２フック部２６，３１の係合を常に安定して行うことができる。 Further, when the first engagement state is shifted to the second engagement state, the cover-side engagement portions 25a to 25f formed in the first cover wall portion 21 of the arc-extinguishing cover 7 are largely displaced to the rear side. When the cover side engaging portions 30a to 30f formed on the second cover wall portion 22 tend to be displaced rearward largely, the engagement stabilizing plates 34a to 34f provided on the upper case 3 move the cover side engaging portions 25a to 25f, A large displacement is regulated by contacting 30a to 30f. Therefore, the engagement of the second hook engaging portion 35 and the second hook portions 26, 31 can always be stably performed when shifting from the first engaged state to the second engaged state.
１　電磁接触器１
２　下ケース
３　上ケース（ケース）
４ａ１，４ｂ１，４ｃ１　主回路の電源側端子部
４ａ２，４ｂ２，４ｃ２　主回路の負荷側端子部
４ｄ１　補助電源側端子部
４ｄ２　補助負荷側端子部
４ｅ　コイル端子
６　接点部
７　消弧カバー
８　端子カバー
１０ａ，１０ｂ　主回路用ケース壁
１１ａ１，１１ａ２，１１ｂ１，１１ｂ２　ケース隔壁
１１ｃ　補助回路用ケース壁
１２　消弧室
１３ａ　固定接点
１３ｂ　固定接点
１４　接点支え
１５　可動接触子
１５ａ，１５ｂ　可動接点
１６　可動鉄心
２０　カバー本体
２１　第1カバー壁部
２２　第２カバー壁部
２３　補助側仕切り壁
２４ａ，２４ｂ，２４ｃ　電源側仕切り壁
２５ａ～２５ｆ　カバー側係合部
２６　第２フック部（第２係合部）
２６ａ　フック係合面（第２係合面）
２７　第１フック部（第１係合部）
２８　補助側仕切り壁
２９ａ，２９ｂ，２９ｃ　負荷側仕切り壁
３０ａ～３０ｆ　カバー側係合部
３１　第２フック部（第２係合部）
３１ａ　フック係合面（第２係合面）
３２　第１フック部（第１係合部）
３３ａ～３３ｄ　カバー側係合部
３４ａ～３４ｆ　係合安定板（係合安定部）
３５　第２フック係合部（第４係合部）
３６　第１フック係合部（第３係合部） 1 Electromagnetic contactor 1
2 Lower case 3 Upper case (case)
4a1, 4b1, 4c1 Main circuit power supply side terminal 4a2, 4b2, 4c2 Main circuit load side terminal 4d1 Auxiliary power supply side terminal 4d2 Auxiliary load side terminal 4e Coil terminal 6 Contact 7 Arc extinguishing cover 8 Terminal cover 10a , 10b Main circuit case walls 11a1, 11a2, 11b1, 11b2 Case partition wall 11c Auxiliary circuit case wall 12 Arc extinguishing chamber 13a Fixed contact 13b Fixed contact 14 Contact support 15 Movable contacts 15a, 15b Movable contact 16 Movable iron core 20 Cover body 21 first cover wall portion 22 second cover wall portion 23 auxiliary side partition walls 24a, 24b, 24c power source side partition walls 25a to 25f cover side engaging portion 26 second hook portion (second engaging portion)
26a hook engaging surface (second engaging surface)
27 first hook portion (first engaging portion)
28 auxiliary side partition walls 29a, 29b, 29c load side partition walls 30a to 30f cover side engaging portion 31 second hook portion (second engaging portion)
31a hook engaging surface (second engaging surface)
32 first hook portion (first engaging portion)
33a to 33d Cover-side engagement portions 34a to 34f Engagement stabilizing plate (engagement stabilizing portion)
35 second hook engaging portion (fourth engaging portion)
36 first hook engaging portion (third engaging portion)

Claims (5)

  1. 　可動接点と固定接点とを有する接点部を消弧室に収納したケースと、前記消弧室を覆って前記ケースに装着される消弧カバーと、を備えた電磁接触器において、
    　前記消弧カバーは、前記ケースに対する装着方向に離間して第１係合部及び第２係合部が形成され、
    　前記ケースは、第３係合部及び第４係合部が形成されており、
    　前記第１係合部及び前記第３係合部が係合した第１係合状態で、前記消弧カバーが前記消弧室を密閉して前記ケースに装着され、
    　前記第２係合部及び前記第４係合部が係合した第２係合状態で、前記消弧カバーと前記ケースの間に隙間を設けた状態で前記ケースに前記消弧カバーが保持されることを特徴とする電磁接触器。     An electromagnetic contactor comprising: a case housing a contact portion having a movable contact and a fixed contact in an arc-extinguishing chamber; and an arc-extinguishing cover attached to the case to cover the arc-extinguishing chamber,
    The arc-extinguishing cover is formed with a first engaging portion and a second engaging portion spaced apart in a mounting direction with respect to the case,
    The case is formed with a third engaging portion and a fourth engaging portion,
    In a first engagement state in which the first engagement portion and the third engagement portion are engaged, the arc extinguishing cover seals the arc extinguishing chamber and is attached to the case,
    In a second engagement state in which the second engaging portion and the fourth engaging portion are engaged, the arc-extinguishing cover is held by the case with a gap provided between the arc-extinguishing cover and the case. An electromagnetic contactor characterized by:
  2. 　前記第１係合状態は前記第２係合状態よりも係合部同士の係合力が弱いことを特徴とする請求項１記載の電磁接触器。 The magnetic contactor according to claim 1, wherein the engagement force between the engagement portions is weaker in the first engagement state than in the second engagement state.
  3. 　前記消弧カバーは、板状のカバー本体と、前記カバー本体から互いに対向して前記装着方向に延在する少なくとも一対のカバー壁部とを備え、
    　前記一対のカバー壁部の前記カバー本体から離間した位置に前記第２係合部が形成され、前記一対のカバー壁部の前記カバー本体に近接する位置に前記第１係合部が形成されていることを特徴とする請求項１又は２記載の電磁接触器。     The arc-extinguishing cover includes a plate-like cover body and at least a pair of cover wall portions facing each other from the cover body and extending in the mounting direction,
    The second engaging portion is formed at a position of the pair of cover walls separated from the cover main body, and the first engaging portion is formed at a position of the pair of cover wall portions adjacent to the cover main body. The electromagnetic contactor according to claim 1 or 2, characterized in that:
  4. 　前記ケースの前記第３係合部及び前記第４係合部は、前記消弧カバーの装着方向に直交する係合面を有し、
    　前記消弧カバーの前記第１係合部は、前記ケースの前記第３係合部の前記係合面に対して摺動する斜面を有し、
    　前記消弧カバーの前記第２係合部は、前記装着方向に直交して前記第４係合部の前記係合面に当接する第２係合面を有していることを特徴とする請求項１又は２記載の電磁接触器。     the third engaging portion and the fourth engaging portion of the case have engaging surfaces orthogonal to the mounting direction of the arc-extinguishing cover;
    The first engaging portion of the arc-extinguishing cover has an inclined surface that slides against the engaging surface of the third engaging portion of the case,
    The second engaging portion of the arc-extinguishing cover has a second engaging surface perpendicular to the mounting direction and abutting against the engaging surface of the fourth engaging portion. 3. The electromagnetic contactor according to item 1 or 2.
  5. 　前記第１係合状態から前記第２係合状態に移行する際に、前記消弧カバーに形成されている前記第２係合部の過度の変形を抑制して前記第２係合状態を安定させる係合安定部を前記ケースに設けていることを特徴とする請求項１又は２記載の電磁接触器。 When shifting from the first engagement state to the second engagement state, the second engagement state is stabilized by suppressing excessive deformation of the second engagement portion formed on the arc-extinguishing cover. 3. The magnetic contactor according to claim 1, wherein the case is provided with an engagement stabilizing portion for allowing the contact.
PCT/JP2022/045155 2022-01-12 2022-12-07 Electromagnetic contactor WO2023135992A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN202280046377.3A CN117581325A (en) 2022-01-12 2022-12-07 Electromagnetic contactor
KR1020237044881A KR20240011830A (en) 2022-01-12 2022-12-07 electromagnetic contactor
JP2023573905A JP7487852B2 (en) 2022-01-12 2022-12-07 Electromagnetic Contactor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022002928 2022-01-12
JP2022-002928 2022-01-12

Publications (1)

Publication Number Publication Date
WO2023135992A1 true WO2023135992A1 (en) 2023-07-20

Family

ID=87278928

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2022/045155 WO2023135992A1 (en) 2022-01-12 2022-12-07 Electromagnetic contactor

Country Status (4)

Country Link
JP (1) JP7487852B2 (en)
KR (1) KR20240011830A (en)
CN (1) CN117581325A (en)
WO (1) WO2023135992A1 (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59144734U (en) * 1983-03-16 1984-09-27 株式会社日立製作所 electromagnetic contactor
JPS62226522A (en) * 1986-03-27 1987-10-05 三菱電機株式会社 Electromagnetic contactor
JP2008047419A (en) * 2006-08-16 2008-02-28 Fuji Electric Fa Components & Systems Co Ltd Electromagnetic contactor
KR20100005998U (en) * 2008-12-04 2010-06-14 엘에스산전 주식회사 Single-phase magnetic contactor
JP2011044287A (en) * 2009-08-20 2011-03-03 Fuji Electric Fa Components & Systems Co Ltd Electromagnetic contactor
CN203573915U (en) * 2013-10-30 2014-04-30 三菱电机株式会社 Installation structure of cover member of electromagnetic contactor and cover member of electromagnetic contractor
CN204348624U (en) * 2015-01-12 2015-05-20 厦门宏发开关设备有限公司 A kind of contactor cover
WO2021181927A1 (en) * 2020-03-12 2021-09-16 富士電機機器制御株式会社 Electromagnetic contactor

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7025033B2 (en) 2019-07-06 2022-02-24 健太郎 上手 Methods to treat or prevent bleeding in aquatic animals and hemostatic agents for aquatic animals

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59144734U (en) * 1983-03-16 1984-09-27 株式会社日立製作所 electromagnetic contactor
JPS62226522A (en) * 1986-03-27 1987-10-05 三菱電機株式会社 Electromagnetic contactor
JP2008047419A (en) * 2006-08-16 2008-02-28 Fuji Electric Fa Components & Systems Co Ltd Electromagnetic contactor
KR20100005998U (en) * 2008-12-04 2010-06-14 엘에스산전 주식회사 Single-phase magnetic contactor
JP2011044287A (en) * 2009-08-20 2011-03-03 Fuji Electric Fa Components & Systems Co Ltd Electromagnetic contactor
CN203573915U (en) * 2013-10-30 2014-04-30 三菱电机株式会社 Installation structure of cover member of electromagnetic contactor and cover member of electromagnetic contractor
CN204348624U (en) * 2015-01-12 2015-05-20 厦门宏发开关设备有限公司 A kind of contactor cover
WO2021181927A1 (en) * 2020-03-12 2021-09-16 富士電機機器制御株式会社 Electromagnetic contactor

Also Published As

Publication number Publication date
KR20240011830A (en) 2024-01-26
CN117581325A (en) 2024-02-20
JP7487852B2 (en) 2024-05-21
JPWO2023135992A1 (en) 2023-07-20

Similar Documents

Publication Publication Date Title
EP2711956B1 (en) Electromagnetic contactor
US20150022296A1 (en) Switch
EP2469564B1 (en) Electromagnetic contactor
CN106716588B (en) Electromagnetic relay
CN102934193A (en) Contact switching device
EP2672497B1 (en) Electromagnetic relay
JP2013080692A (en) Electromagnetic relay
JP5864902B2 (en) Assembling method of arc extinguishing chamber of magnetic contactor
JP6799622B2 (en) DC relay with auxiliary contacts
JP2019098931A (en) Battery carrier
WO2012157171A1 (en) Electromagnetic contactor
JP4375012B2 (en) Support structure for fixed contact terminals
WO2023135992A1 (en) Electromagnetic contactor
US10636600B2 (en) Electromagnetic relay
JP4848887B2 (en) Magnetic contactor
WO2016103294A1 (en) Electromagnetic switch
JP7422891B2 (en) Arc extinguishing assembly and circuit breaker equipped with the same {ARC EXTINGUISHING ASSEMBLY AND CIRCUIT BREAKER HAVING THEREOF}
JP6205928B2 (en) Magnetic contactor
CN216119978U (en) Contact relay
WO2020148995A1 (en) Relay
JP2023177953A (en) electromagnetic contactor
JPH11185584A (en) Movable contact support for electromagnetic contactor
JP2023003206A (en) Contact structure
KR20230007230A (en) Electromagnetic relay
JP6248440B2 (en) Magnetic contactor

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22920512

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2023573905

Country of ref document: JP

ENP Entry into the national phase

Ref document number: 20237044881

Country of ref document: KR

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 1020237044881

Country of ref document: KR

WWE Wipo information: entry into national phase

Ref document number: 202280046377.3

Country of ref document: CN