JP6881258B2 - Connection structure of electrical equipment - Google Patents

Connection structure of electrical equipment Download PDF

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Publication number
JP6881258B2
JP6881258B2 JP2017227742A JP2017227742A JP6881258B2 JP 6881258 B2 JP6881258 B2 JP 6881258B2 JP 2017227742 A JP2017227742 A JP 2017227742A JP 2017227742 A JP2017227742 A JP 2017227742A JP 6881258 B2 JP6881258 B2 JP 6881258B2
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Prior art keywords
terminal
screw
engaging
auxiliary
plate portion
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JP2019096583A (en
Inventor
武雄 鴨崎
武雄 鴨崎
賢 藤田
賢 藤田
紀子 橋村
紀子 橋村
悠真 小野木
悠真 小野木
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Fuji Electric FA Components and Systems Co Ltd
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Fuji Electric FA Components and Systems Co Ltd
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Application filed by Fuji Electric FA Components and Systems Co Ltd filed Critical Fuji Electric FA Components and Systems Co Ltd
Priority to JP2017227742A priority Critical patent/JP6881258B2/en
Priority to CN201811038412.9A priority patent/CN109841454B/en
Priority to EP18192847.4A priority patent/EP3493237B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/20—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition
    • H01H83/22—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition the other condition being imbalance of two or more currents or voltages
    • H01H83/223—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition the other condition being imbalance of two or more currents or voltages with bimetal elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/08—Terminals; Connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • H01H71/7409—Interchangeable elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/02—Bases, casings, or covers
    • H01H9/0264—Protective covers for terminals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
    • H01R4/305—Clamped connections, spring connections utilising a screw or nut clamping member having means for facilitating engagement of conductive member or for holding it in position
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/48—Clamped connections, spring connections utilising a spring, clip, or other resilient member
    • H01R4/4809—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar
    • H01R4/48185—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar adapted for axial insertion of a wire end
    • H01R4/4819—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar adapted for axial insertion of a wire end the spring shape allowing insertion of the conductor end when the spring is unbiased
    • H01R4/4821—Single-blade spring
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/14—Electrothermal mechanisms
    • H01H71/16—Electrothermal mechanisms with bimetal element
    • H01H71/161—Electrothermal mechanisms with bimetal element with helically or spirally wound bimetal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/48—Clamped connections, spring connections utilising a spring, clip, or other resilient member
    • H01R4/4809—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar
    • H01R4/484—Spring housing details
    • H01R4/4842—Spring housing details the spring housing being provided with a single opening for insertion of a spring-activating tool
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/48—Clamped connections, spring connections utilising a spring, clip, or other resilient member
    • H01R4/4809—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar
    • H01R4/4846—Busbar details
    • H01R4/485—Single busbar common to multiple springs

Landscapes

  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)

Description

本発明は、熱動形過負荷リレー、電磁接触器等のねじ端子を有する電気機器の接続構造に関する。 The present invention relates to a connection structure of an electric device having a screw terminal such as a thermal overload relay and an electromagnetic contactor.

この種の電気機器の接続構造として、例えば熱動形過負荷リレーでは、特許文献１に記載されているように、３つの主端子と４つの補助端子とを備えている。これら各端子は、雌ねじを形成した端子板と、この端子板の雌ねじに螺合する端子ねじとを備えたねじ端子で構成されている。このねじ端子には、通常は、接続コードに装着した圧着端子や、接続コードの被覆から露出された芯線を接続する。この場合の圧着端子や芯線の接続は、端子板上に圧着端子や、芯線を配置した状態で、座金を挿通した端子ねじを端子板の雌ねじ部に螺合させて締付けるようにしている。また、ねじ端子には、圧着端子やコードの芯線の他に、他の電磁接触器等の電気機器やアドオン部品と称される中間部品を接続する。 As a connection structure for this type of electrical equipment, for example, a thermal overload relay includes three main terminals and four auxiliary terminals as described in Patent Document 1. Each of these terminals is composed of a screw terminal including a terminal plate on which a female screw is formed and a terminal screw screwed into the female screw of the terminal plate. Normally, a crimp terminal attached to the connection cord or a core wire exposed from the coating of the connection cord is connected to this screw terminal. In this case, the crimp terminal and the core wire are connected by screwing the terminal screw through which the washer is inserted into the female screw portion of the terminal plate while the crimp terminal and the core wire are arranged on the terminal plate. Further, in addition to the crimp terminal and the core wire of the cord, other electric devices such as magnetic contactors and intermediate parts called add-on parts are connected to the screw terminals.

特開２０１４−１０７０２３号公報Japanese Unexamined Patent Publication No. 2014-107023

ところで、電気機器に設けられたねじ端子に個別に被接続部材を接続する場合には、前述したように、ねじ端子の端子板上に被接続部材の被接続端子を載置してから座金を挿通した端子ねじを端子板に形成された雌ねじ部に螺合させて締め付ける。このため、端子ねじ及び座金が被接続端子に接触して締め付けを開始したときに、被接続端子が端子ねじの回転に伴って連れ回りすることになる。したがって、被接続部材の接続位置が正規の接続位置よりずれてしまうという課題がある。このため、被接続部材を覆う端子カバーを装着する場合には、端子カバーの装着が困難となる場合が生じる。また、連れ回りすることによって電気機器に設けられた隔壁に被接続部材が衝突し、隔壁が損傷してしまうことで絶縁性能の劣化や、正規位置での端子接続ができなくなる恐れが生じる。 By the way, when the connected member is individually connected to the screw terminal provided in the electric device, as described above, the connected terminal of the connected member is placed on the terminal plate of the screw terminal, and then the washer is placed. The inserted terminal screw is screwed into the female screw portion formed on the terminal plate and tightened. Therefore, when the terminal screw and the washer come into contact with the connected terminal and start tightening, the connected terminal is rotated along with the rotation of the terminal screw. Therefore, there is a problem that the connection position of the connected member deviates from the regular connection position. Therefore, when the terminal cover that covers the connected member is attached, it may be difficult to attach the terminal cover. In addition, the members to be connected collide with the partition wall provided in the electric device due to the rotation, and the partition wall is damaged, which may lead to deterioration of the insulation performance and the inability to connect the terminals at the normal position.

そこで、本発明は、上記先行技術の課題に着目してなされたものであって、電気機器のねじ端子に被接続端子を正確に位置決めして接続することができる電気機器の接続構造を提供することを目的としている。 Therefore, the present invention has been made by paying attention to the above-mentioned problems of the prior art, and provides a connection structure of an electric device capable of accurately positioning and connecting a connected terminal to a screw terminal of the electric device. The purpose is.

上記目的を達成するために、本発明に係る電気機器の接続構造の一態様は、電気機器に形成されたねじ端子と、被接続部材に形成された被接続端子とを電気的に接続する電気機器の接続構造である。この接続構造は、ねじ端子及び被接続端子に互いに係合する回り止め機構を設けている。 In order to achieve the above object, one aspect of the connection structure of the electric device according to the present invention is electricity that electrically connects the screw terminal formed on the electric device and the connected terminal formed on the connected member. It is a device connection structure. This connection structure is provided with a detent mechanism that engages the screw terminal and the connected terminal with each other.

本発明の一態様によれば、ねじ端子及び被接続端子に回り止め機構を設けたので、ねじ端子の端子板に被接続端子を配置した状態で端子ねじを締め付けたときに、回り止め機構によって被接続端子の連れ回りを止めて正確な位置決めを行うことができる。 According to one aspect of the present invention, since the screw terminal and the connected terminal are provided with a detent mechanism, when the terminal screw is tightened with the connected terminal arranged on the terminal plate of the screw terminal, the detent mechanism is used. Accurate positioning can be performed by stopping the rotation of the connected terminals.

本発明の一実施形態を示す電気機器の正面図である。It is a front view of the electric apparatus which shows one Embodiment of this invention. 本発明の一実施形態を示す電気機器の背面図である。It is a rear view of the electric apparatus which shows one Embodiment of this invention. 本発明の一実施形態を示す電気機器の平面図である。It is a top view of the electric appliance which shows one Embodiment of this invention. 熱動形過負荷リレーを示す斜視図である。It is a perspective view which shows the thermal type overload relay. 端子カバーを取り外した状態の平面図である。It is a top view with the terminal cover removed. 端子カバーを取り外した状態の斜視図である。It is a perspective view with the terminal cover removed. 図１のVII−VII線上の断面図である。It is sectional drawing on the line VII-VII of FIG. 図３のVIII−VIII線上の断面図である。FIG. 3 is a cross-sectional view taken along the line VIII-VIII of FIG. 図３のIX−IX線上の断面図である。It is sectional drawing on the IX-IX line of FIG. 図３のＸ−Ｘ線上の断面図である。FIG. 3 is a cross-sectional view taken along the line XX of FIG. 図３のXI−XI線上の断面図である。It is sectional drawing on the XI-XI line of FIG. 端子カバーの正面図である。It is a front view of a terminal cover.

次に、図面を参照して、本発明の一実施の形態を説明する。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場合がある。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。又、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, an embodiment of the present invention will be described with reference to the drawings. In the description of the drawings below, the same or similar parts are designated by the same or similar reference numerals. However, the drawings are schematic, and the relationship between the thickness and the plane dimensions, the ratio of the thickness of each layer, and the like may differ from the actual ones. Therefore, the specific thickness and dimensions should be determined in consideration of the following explanation. In addition, it goes without saying that the drawings include parts having different dimensional relationships and ratios from each other.

また、以下に示す実施の形態は、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。
本発明の一実施形態を電気機器の一つである熱動形過負荷リレーについて説明する。
熱動形過負荷リレー（サーマルリレー）１０は、図１に示すように、正面に３本の外部接続ピン１１ｕ、１１ｖ及び１１ｗが上部から下方に突出して平行に配置されている。これら外部接続ピン１１ｕ、１１ｖ及び１１ｗは、接続対象となる他の電気機器例えば電磁接触器に形成されたスプリング端子に挿通される。 Further, the embodiments shown below exemplify devices and methods for embodying the technical idea of the present invention, and the technical idea of the present invention describes the material, shape, structure, and the like of the component parts. The arrangement etc. is not specified as the following. The technical idea of the present invention may be modified in various ways within the technical scope specified by the claims stated in the claims.
An embodiment of the present invention will be described with respect to a thermal overload relay which is one of electric devices.
As shown in FIG. 1, the thermal overload relay (thermal relay) 10 has three external connection pins 11u, 11v and 11w projecting downward from the upper portion and arranged in parallel on the front surface. These external connection pins 11u, 11v and 11w are inserted into spring terminals formed in other electrical equipment to be connected, for example, an electromagnetic contactor.

また、熱動形過負荷リレー１０は、図４に示すように、背面に３つの主端子１２ｕ、１２ｖ及び１２ｗが左右方向に並列状態で配置されている。主端子１２ｕは、図６に示すように、左右側面が熱動形過負荷リレー１０の前後方向に延長する側壁１３ａ及び隔壁１３ｂに接触した状態で固定されている。主端子１２ｖは、図６に示すように、左右側面が熱動形過負荷リレー１０の前後方向に延長する隔壁１３ｂ及び１３ｃに接触した状態で固定されている。主端子１２ｗは、図６に示すように、左右側面が熱動形過負荷リレー１０の前後方向に延長する隔壁１３ｃ及び１３ｄに接触した状態で固定されている。 Further, as shown in FIG. 4, the thermal overload relay 10 has three main terminals 12u, 12v and 12w arranged in parallel in the left-right direction on the back surface. As shown in FIG. 6, the main terminal 12u is fixed in a state where the left and right side surfaces are in contact with the side wall 13a and the partition wall 13b extending in the front-rear direction of the thermal overload relay 10. As shown in FIG. 6, the main terminal 12v is fixed in a state where the left and right side surfaces are in contact with the partition walls 13b and 13c extending in the front-rear direction of the thermal overload relay 10. As shown in FIG. 6, the main terminal 12w is fixed in a state where the left and right side surfaces are in contact with the partition walls 13c and 13d extending in the front-rear direction of the thermal overload relay 10.

さらに、熱動形過負荷リレー１０は、図４に示すように、背面に主端子１２ｗの外側に補助端子１４ａ、１４ｂ及び１４ｃ、１４ｄが２つずつ左右方向に並列された状態で階段状に２段に配置されている。これら補助端子１４ａ〜１４ｄも左右側面が熱動形過負荷リレー１０に形成された前後方向に延長する隔壁１３ｄ、１３ｅ及び側壁１３ｆに接触した状態で固定されている。 Further, as shown in FIG. 4, the thermal overload relay 10 has two auxiliary terminals 14a, 14b, 14c, and 14d arranged side by side in the left-right direction on the outside of the main terminal 12w on the back surface in a stepped shape. It is arranged in two stages. These auxiliary terminals 14a to 14d are also fixed in a state where the left and right side surfaces are in contact with the partition walls 13d, 13e and the side wall 13f extending in the front-rear direction formed on the thermal overload relay 10.

これら主端子１２ｕ〜１２ｗ及び補助端子１４ａ〜１４ｄは、端子板１５と端子ねじ１６とを備えたねじ端子構造を有する。端子板１５は導電性金属材で製作されている。端子板１５には、図９で拡大図示するように、中央部に下方に突出する円筒部１７がバーリング加工によって形成されている。この円筒部１７の内周面には雌ねじ部１８が形成されている。端子ねじ１６には、座金１９が装着され、この端子ねじ１６が雌ねじ部１８に螺合する。 These main terminals 12u to 12w and auxiliary terminals 14a to 14d have a screw terminal structure including a terminal plate 15 and a terminal screw 16. The terminal plate 15 is made of a conductive metal material. As shown in an enlarged view in FIG. 9, a cylindrical portion 17 projecting downward in the central portion is formed on the terminal plate 15 by burring. A female screw portion 18 is formed on the inner peripheral surface of the cylindrical portion 17. A washer 19 is attached to the terminal screw 16, and the terminal screw 16 is screwed into the female screw portion 18.

各端子板１５には、図８に拡大図示するように、雌ねじ部１８の中心を通って半径方向の左右方向に延長する断面半円形状の突条２０が形成されている。この突条２０は、回り止め機構ＲＳを形成する第１係合部となるものである。突条２０は端子板１５をプレス加工する際に、下面側からエンボス加工によって形成される。
端子ねじ１６は、端子板１５の雌ねじ部１８に螺合する。この端子ねじ１６は、頭部側に座金１９を回転可能に保持している。この座金１９は、端子ねじ１６と別体とすることもできる。 As shown in an enlarged view in FIG. 8, each terminal plate 15 is formed with a ridge 20 having a semicircular cross section extending in the left-right direction in the radial direction through the center of the female screw portion 18. The ridge 20 serves as a first engaging portion for forming the detent mechanism RS. The ridge 20 is formed by embossing from the lower surface side when the terminal plate 15 is pressed.
The terminal screw 16 is screwed into the female screw portion 18 of the terminal plate 15. The terminal screw 16 rotatably holds a washer 19 on the head side. The washer 19 can be separated from the terminal screw 16.

また、熱動形過負荷リレー１０は、図７に示すように、内部に３つのバイメタル２１ｕ、２１ｖ及び２１ｗを備えている。これらバイメタル２１ｕ〜２１ｗは、外部接続ピン１１ｕ〜１１ｗ及び主端子１２ｕ〜１２ｗ間を流れる電流が過電流状態となったときに加熱されて図示しないシフタ、釈放レバー、接点反転機構によって通電路を遮断するトリップ状態となる。 Further, as shown in FIG. 7, the thermal overload relay 10 is provided with three bimetals 21u, 21v and 21w inside. These bimetals 21u to 21w are heated when the current flowing between the external connection pins 11u to 11w and the main terminals 12u to 12w becomes an overcurrent state, and the energization path is cut off by a shifter, a release lever, and a contact reversing mechanism (not shown). It becomes a trip state.

さらに、熱動形過負荷リレー１０は、図３に示すように、上面にトリップ状態を解除するリセット棒２１が突出されている。
熱動形過負荷リレー１０の主端子１２ｕ〜１２ｗと補助端子１４ａ〜１４ｄには、熱動形過負荷リレー１０へスプリング端子による接続を可能とするアドオン部品となる被接続部材であるスプリング端子部品３１が接続される。 Further, as shown in FIG. 3, the thermal overload relay 10 has a reset rod 21 projecting from the upper surface thereof to release the trip state.
The main terminals 12u to 12w and the auxiliary terminals 14a to 14d of the thermal overload relay 10 are connected to the thermal overload relay 10 by a spring terminal, which is a spring terminal component which is an add-on component. 31 is connected.

このスプリング端子部品３１は、主端子用端子部品３２と補助端子用端子部品３３Ａ，３３Ｂとで構成されている。
主端子用端子部品３２は、図４、図５及び図８に示すように、主端子１２ｕ〜１２ｗに対して個別に接続されるように３つ用意されている。
各主端子用端子部品３２は、例えば合成樹脂材で成型された絶縁ケース３５を有する。この絶縁ケース３５は、図５及び図９に示すように、底板部３５ａ、前面板部３５ｂ、後面板部３５ｃ及び左側面板部３５ｄとで、側面から見て略Ｕ字状に形成されている。 The spring terminal component 31 is composed of a main terminal terminal component 32 and auxiliary terminal terminal components 33A and 33B.
As shown in FIGS. 4, 5 and 8, three main terminal component 32s are prepared so as to be individually connected to the main terminals 12u to 12w.
Each main terminal terminal component 32 has, for example, an insulating case 35 molded of a synthetic resin material. As shown in FIGS. 5 and 9, the insulating case 35 is formed in a substantially U shape when viewed from the side surface by the bottom plate portion 35a, the front plate portion 35b, the rear surface plate portion 35c, and the left side plate portion 35d. ..

底板部３５ａは、前後方向に延長する平面から見て長方形状に形成されている。この底板部３５ａの前端側の下面には、図９に示すように、下方に突出する係合突起３５ａ１が形成されている。この係合突起３５ａ１は後述する端子カバー５１の係合孔５７に係合する。
前面板部３５ｂは、底板部３５ａの前端から上方に延長する第１垂直板部３５ｂ１と、この垂直板部３５ｂ１の上端から上方及び前方に離間して上方に延長する第２垂直板部３５ｂ２と、この第２垂直板部３５ｂ２から上方に且つ後方に湾曲延長する湾曲板部３５ｂ３とで構成されている。 The bottom plate portion 35a is formed in a rectangular shape when viewed from a plane extending in the front-rear direction. As shown in FIG. 9, an engaging protrusion 35a1 projecting downward is formed on the lower surface of the bottom plate portion 35a on the front end side. The engaging projection 35a1 engages with the engaging hole 57 of the terminal cover 51, which will be described later.
The front plate portion 35b includes a first vertical plate portion 35b1 extending upward from the front end of the bottom plate portion 35a, and a second vertical plate portion 35b2 extending upward and forward away from the upper end of the vertical plate portion 35b1. It is composed of a curved plate portion 35b3 that curves upward and backward from the second vertical plate portion 35b2.

後面板部３５ｃは、底板部３５ａの後端から上方に前面板部３５ｂの第２垂直板部３５ｂ２の上端まで延長している。
左側面板部３５ｄは、底板部３５ａの左側端部から上方に延長し、前面板部３５ｂの湾曲板部３５ｂ３の上端と略等しい高さの前側板部３５ｄ１と後面板部３５ｃの上端と略等しい高さの後側板部３５ｄ２とで構成されている。この左側面板部３５ｄには内面に右端側に突出する環状周壁３６が形成されている。 The rear plate portion 35c extends upward from the rear end of the bottom plate portion 35a to the upper end of the second vertical plate portion 35b2 of the front plate portion 35b.
The left side plate portion 35d extends upward from the left end portion of the bottom plate portion 35a, and is substantially equal to the upper ends of the front side plate portion 35d1 and the rear surface plate portion 35c having a height substantially equal to the upper end of the curved plate portion 35b3 of the front plate portion 35b. It is composed of a rear plate portion 35d2 having a height. An annular peripheral wall 36 projecting to the right end side is formed on the inner surface of the left side plate portion 35d.

この環状周壁３６は、図５及び図９に示すように、互いに連続する底壁部３６ａ、前面壁部３６ｂ、上面壁部３６ｃ及び後面壁部３６ｄを備えている。底壁部３６ａは、底板部３５ａに対して所定間隔だけ離間して対向している。
前面壁部３６ｂは、底板部３５ａの前端から上方に延長し、前面板部３５ｂと所定間隔だけ離間して対向している。この前面壁部３６ｂには、底壁部３６ａ側に後方にずれる段部３６ｅが形成されているとともに、上下方向の中間部に前方に突出する係合突部３６ｆが形成されている。 As shown in FIGS. 5 and 9, the annular peripheral wall 36 includes a bottom wall portion 36a, a front wall portion 36b, an upper surface wall portion 36c, and a rear surface wall portion 36d that are continuous with each other. The bottom wall portion 36a faces the bottom plate portion 35a at a predetermined interval.
The front wall portion 36b extends upward from the front end of the bottom plate portion 35a and faces the front plate portion 35b at a predetermined interval. The front wall portion 36b is formed with a step portion 36e that is displaced rearward toward the bottom wall portion 36a, and an engaging protrusion 36f that projects forward in the middle portion in the vertical direction.

上面壁部３６ｃは前面壁部３６ｂの上端から後方に僅かに延長している。後面壁部３６ｄは、上面壁部３６ｃの後端から下方に延長する垂直壁部とこの垂直壁部から斜め後方に延長する傾斜壁部とこの傾斜壁部から下方に延長して底壁部３６ａに達する垂直壁部とで構成されている。
また、絶縁ケース３５には、図８に示すように、鉄材等の導電性金属材で形成された被接続端子３７が保持されている。この被接続端子３７は、端子部３７ａとこれに連続するＵ字状導電板部３７ｂとで構成されている。 The upper surface wall portion 36c extends slightly rearward from the upper end of the front wall portion 36b. The rear wall portion 36d includes a vertical wall portion extending downward from the rear end of the upper surface wall portion 36c, an inclined wall portion extending diagonally rearward from the vertical wall portion, and a bottom wall portion 36a extending downward from the inclined wall portion. It is composed of a vertical wall that reaches.
Further, as shown in FIG. 8, the insulating case 35 holds a connected terminal 37 made of a conductive metal material such as an iron material. The connected terminal 37 is composed of a terminal portion 37a and a U-shaped conductive plate portion 37b continuous thereto.

端子部３７ａは、絶縁ケース３５の前面板部３５ｂの第１垂直板部３５ｂ１及び第２垂直板部３５ｂ２間の窓部３５ｂ４を通じて前方に突出延長し、先端に図９で拡大図示するように、端子ねじ１６を挿通可能な貫通孔３７ｃが形成されている。また、端子部３７ａには、図８で拡大図示するように、下面側に貫通孔３７ｃを中心として半径方向の左右方向に延長する断面三角形状の係合溝３７ｄが形成されている。この係合溝３７ｄは、主端子１２ｕ〜ｗの端子板１５に形成された突条２０に係合して回り止め機構ＲＳの第２係合部を構成する。 The terminal portion 37a protrudes forward through the window portion 35b4 between the first vertical plate portion 35b1 and the second vertical plate portion 35b2 of the front plate portion 35b of the insulating case 35, and extends forward to the tip thereof as shown in an enlarged view in FIG. A through hole 37c through which the terminal screw 16 can be inserted is formed. Further, as shown in an enlarged view in FIG. 8, the terminal portion 37a is formed with an engaging groove 37d having a triangular cross section extending in the left-right direction in the radial direction with the through hole 37c as the center on the lower surface side. The engaging groove 37d engages with the ridges 20 formed on the terminal plates 15 of the main terminals 12u to 12w to form a second engaging portion of the detent mechanism RS.

Ｕ字状導電板部３７ｂは、端子部３７ａの後端から下方に延長する前面板部３７ｂ１と、この前面板部３７ｂ１の下端から後方に延長する底板部３７ｂ２と、この底板部３７ｂ２の後端から上方に延長する後面板部３７ｂ３とを備えている。底板部３７ｂ２の右側面には、図４に示すように、右方に突出する係合板部３７ｂ４が形成されている。後面板部３７ｂ３の上端側内面には前方に突出する係合突起３７ｂ５が形成されている。 The U-shaped conductive plate portion 37b includes a front plate portion 37b1 extending downward from the rear end of the terminal portion 37a, a bottom plate portion 37b2 extending rearward from the lower end of the front plate portion 37b1, and a rear end of the bottom plate portion 37b2. It is provided with a rear surface plate portion 37b3 extending upward from the surface. As shown in FIG. 4, an engaging plate portion 37b4 projecting to the right is formed on the right side surface of the bottom plate portion 37b2. An engaging protrusion 37b5 projecting forward is formed on the inner surface of the rear plate portion 37b3 on the upper end side.

そして、被接続端子３７は、Ｕ字状導電板部３７ｂが絶縁ケース３５にその前面板部３５ｂ、底板部３５ａ及び後面板部３５ｃの内面に沿うように保持されている。ここで、Ｕ字状導電板部３７ｂは、前面板部３７ｂ１及び底板部３７ｂ２が絶縁ケース３５の前面板部３５ｂ及び底板部３５ａと環状周壁３６の前面壁部３６ｂ及び底壁部３６ａとの間に挿入されて絶縁ケース３５に保持されている。 The connected terminal 37 is held so that the U-shaped conductive plate portion 37b is held in the insulating case 35 along the inner surfaces of the front plate portion 35b, the bottom plate portion 35a, and the rear surface plate portion 35c. Here, in the U-shaped conductive plate portion 37b, the front plate portion 37b1 and the bottom plate portion 37b2 are between the front plate portion 35b and the bottom plate portion 35a of the insulating case 35 and the front wall portion 36b and the bottom wall portion 36a of the annular peripheral wall 36. It is inserted into and held in the insulating case 35.

さらに、絶縁ケース３５には、図９に示すように、導電性ばね材で逆Ｕ字状に形成された端子スプリング３８が保持されている。この端子スプリング３８は，前面板部３８ａ、湾曲板部３８ｂ及び傾斜板部３８ｃを備えている。前面板部３８ａは、環状周壁３６の前面壁部３６ｂの段部３６ｅから前面壁部３６ｂに沿って上方まで延長している。湾曲板部３８ｂは、前面板部３８ａの上端から折り曲げられて絶縁ケース３５の前面板部３５ｂの湾曲板部３５ｂ３と環状周壁３６の上面壁部３６ｃとの間を通って後方側に延長している。傾斜板部３８ｃは、湾曲板部３８ｂの後端から後下方にドッグレッグ状に屈曲されて延長され、先端がＵ字状導電板部３７ｂの係合突起３７ｂ５の下端側に係合されている。 Further, as shown in FIG. 9, the insulating case 35 holds a terminal spring 38 formed of a conductive spring material in an inverted U shape. The terminal spring 38 includes a front plate portion 38a, a curved plate portion 38b, and an inclined plate portion 38c. The front plate portion 38a extends upward from the step portion 36e of the front wall portion 36b of the annular peripheral wall 36 along the front wall portion 36b. The curved plate portion 38b is bent from the upper end of the front plate portion 38a and extends rearward through between the curved plate portion 35b3 of the front plate portion 35b of the insulating case 35 and the upper surface wall portion 36c of the annular peripheral wall 36. There is. The inclined plate portion 38c is bent and extended in a dogleg shape from the rear end of the curved plate portion 38b downward and rearward, and the tip is engaged with the lower end side of the engaging projection 37b5 of the U-shaped conductive plate portion 37b. ..

この端子スプリング３８と、被接続端子３７のＵ字状導電板部３７ｂの後面板部３７ｂ２とでスプリング端子３９が構成されている。
また、補助端子用端子部品３３Ａ及び３３Ｂは、図１０に示すように、上述した主端子用端子部品３２に対して小さい相似形状に形成されている。したがって、補助端子用端子部品３３Ａ及び３３Ｂについての詳細説明はこれを省略するが、絶縁ケース４５、環状周壁４６、被接続端子４７及び端子スプリング４８を備えている。ここで、被接続端子４７には、図１０で拡大図示するように、主端子用端子部品３２の被接続端子３７と同様に、熱動形過負荷リレー１０の主端子１２ｕ〜１２ｗの端子板１５に形成された突条２０に係合する断面三角形状の第２係合部としての係合溝４７ｘが形成されている。この係合溝４７ｘと突条２０とで回り止め機構ＲＳが構成されている。なお、補助端子用端子部品３３Ａ及び３３Ｂには、端子スプリング４８が並列に２つ配置されている。 The spring terminal 39 is composed of the terminal spring 38 and the rear plate portion 37b2 of the U-shaped conductive plate portion 37b of the connected terminal 37.
Further, as shown in FIG. 10, the auxiliary terminal terminal components 33A and 33B are formed in a shape similar to that of the main terminal terminal component 32 described above. Therefore, although detailed description of the auxiliary terminal terminal parts 33A and 33B will be omitted, the insulating case 45, the annular peripheral wall 46, the connected terminal 47, and the terminal spring 48 are provided. Here, as shown in an enlarged view in FIG. 10, the connected terminal 47 is a terminal plate of the main terminals 12u to 12w of the thermal overload relay 10 in the same manner as the connected terminal 37 of the main terminal terminal component 32. An engaging groove 47x is formed as a second engaging portion having a triangular cross section that engages with the ridge 20 formed in 15. The detent mechanism RS is composed of the engaging groove 47x and the ridge 20. Two terminal springs 48 are arranged in parallel on the auxiliary terminal terminal parts 33A and 33B.

また、下段側の補助端子１４ｃ及び１４ｄに装着する補助端子用端子部品３３Ｂは、上段側の補助端子１４ａ及び１４ｂに装着する補助端子用端子部品３３Ａに対して被接続端子４７の長さが長く設定されている。したがって、図１０に示すように、補助端子用端子部品３３Ａ及び３３Ｂを補助端子１４ａ，１４ｂ及び１４ｃ，１４ｄに装着したときに、端子スプリング４８の係止位置が上下方向で重ならないようにしている。 Further, the auxiliary terminal terminal component 33B mounted on the lower auxiliary terminals 14c and 14d has a longer length of the connected terminal 47 than the auxiliary terminal terminal component 33A mounted on the upper auxiliary terminals 14a and 14b. It is set. Therefore, as shown in FIG. 10, when the auxiliary terminal terminal parts 33A and 33B are attached to the auxiliary terminals 14a, 14b and 14c, 14d, the locking positions of the terminal springs 48 are prevented from overlapping in the vertical direction. ..

さらに、絶縁ケース４５の底面板部４５ａの前端側には、図１１に示すように、下面に下方に突出する係合突起４５ｘが形成されている。この係合突起４５ｘは、被接続端子４７のＵ字状導電板部４７ｂに形成された貫通孔を通じて後述する端子カバー５１の長溝５８に形成された係合孔５９に係合する。
そして、熱動形過負荷リレー１０の主端子１２ｕ〜１２ｗに個別に主端子用端子部品３２を装着し、補助端子１４ａ，１４ｂ及び１４ｃ，１４ｄに個別に補助端子用端子部品３３Ａ及び３３Ｂを装着した状態で、主端子用端子部品３２と補助端子用端子部品３３Ａ及び３３Ｂの全てを覆うように端子カバー５１が装着されている。 Further, as shown in FIG. 11, an engaging projection 45x protruding downward is formed on the front end side of the bottom plate portion 45a of the insulating case 45. The engaging projection 45x engages with the engaging hole 59 formed in the elongated groove 58 of the terminal cover 51 described later through the through hole formed in the U-shaped conductive plate portion 47b of the connected terminal 47.
Then, the main terminal components 32 are individually attached to the main terminals 12u to 12w of the thermal overload relay 10, and the auxiliary terminal terminals 33A and 33B are individually attached to the auxiliary terminals 14a, 14b and 14c, 14d. In this state, the terminal cover 51 is attached so as to cover all of the main terminal terminal component 32 and the auxiliary terminal terminal components 33A and 33B.

この端子カバー５１は、図１２に示すように、各主端子用端子部品３２を収納する端子部品収納部５２と各補助端子用端子部品３３Ａ及び３３Ｂとを個別に収納する端子部品収納部５３Ａ及び５３Ｂとが絶縁隔壁５４で区切られて形成されている。
端子部品収納部５２には、図１２に示すように、内周面に被接続端子３７のＵ字状導電板部３７ｂの後面板部３７ｂ３に形成された係合板部３７ｂ４が係合する係合溝５２ａが形成されている。 As shown in FIG. 12, the terminal cover 51 has a terminal component storage section 52 for accommodating each main terminal terminal component 32 and a terminal component storage section 53A for individually accommodating each auxiliary terminal terminal component 33A and 33B. It is formed so as to be separated from 53B by an insulating partition wall 54.
As shown in FIG. 12, the terminal component storage portion 52 is engaged with the engaging plate portion 37b4 formed on the rear surface plate portion 37b3 of the U-shaped conductive plate portion 37b of the connected terminal 37 on the inner peripheral surface. A groove 52a is formed.

また、端子部品収納部５２の上部には、図５に示すように熱動形過負荷リレー１０の主端子１２ｕ〜１２ｗを覆う庇部５５が形成されている。同様に、端子部品収納部５３Ａの上部には補助端子１４ａ及び１４ｂを覆う庇部５６が形成されている。庇部５５には、熱動形過負荷リレー１０の隔壁１３ｂ及び１３ｃの上端に形成された係合部１３ｇが係合する係合長孔５５ａ及び５５ｂが貫通して形成されている。庇部５６には、熱動形過負荷リレー１０の隔壁１３ｅの上端に形成された係合部１３ｇが係合する係合長孔５６ａが貫通して形成されている。 Further, as shown in FIG. 5, an eaves portion 55 covering the main terminals 12u to 12w of the thermal overload relay 10 is formed on the upper portion of the terminal component accommodating portion 52. Similarly, an eaves portion 56 that covers the auxiliary terminals 14a and 14b is formed on the upper portion of the terminal component storage portion 53A. The eaves 55 are formed through the engaging elongated holes 55a and 55b to which the engaging portions 13g formed at the upper ends of the partition walls 13b and 13c of the thermal overload relay 10 are engaged. The eaves portion 56 is formed through an engaging elongated hole 56a with which the engaging portion 13g formed at the upper end of the partition wall 13e of the thermal overload relay 10 is engaged.

また、端子部品収納部５２の下面側には、図９に示すように、主端子用端子部品３２の絶縁ケース３５に形成された係合突起３５ａ１が係合する係合孔５７が前後方向に延長して形成されている。この係合孔５７の前端側に端子カバー５１を装着する際に、係合突起３５ａ１を乗り越えてスナップフィット結合するフック部５２ｄが形成されている。
一方、端子部品収納部５３Ｂの下面側には工具の挿通が不能な幅の長溝５８が形成され、この長溝５８の前端部の底面に補助端子用端子部品３３Ｂの下面に形成された係合突起４５ｘが係合する係合孔５９が貫通して形成されている。なお、図１１に示すように、端子カバー５１の端子部品収納部５３Ｂの底面板部５３ｃの係合孔５９を形成する端部の上面にフック部５３ｄが形成されている。このフック部５３ｄは、端子カバー５１を装着する際に、補助端子用端子部品３３Ｂに形成された係合突起４５ｘを乗り越えてスナップフィット結合する。 Further, as shown in FIG. 9, on the lower surface side of the terminal component accommodating portion 52, an engaging hole 57 with which the engaging projection 35a1 formed in the insulating case 35 of the main terminal terminal component 32 is engaged is provided in the front-rear direction. It is formed by extension. When the terminal cover 51 is attached to the front end side of the engaging hole 57, a hook portion 52d that overcomes the engaging projection 35a1 and snap-fits the hook portion 52d is formed.
On the other hand, a long groove 58 having a width in which a tool cannot be inserted is formed on the lower surface side of the terminal component storage portion 53B, and an engaging protrusion formed on the lower surface of the auxiliary terminal component 33B on the bottom surface of the front end portion of the long groove 58. An engaging hole 59 with which 45x engages is formed through. As shown in FIG. 11, the hook portion 53d is formed on the upper surface of the end portion of the bottom plate portion 53c of the terminal component storage portion 53B of the terminal cover 51 that forms the engaging hole 59. When the terminal cover 51 is attached, the hook portion 53d gets over the engaging projection 45x formed on the auxiliary terminal terminal component 33B and snap-fits the hook portion 53d.

さらに、端子部品収納部５２の上面の後端側には、主端子接続ケーブル６０の単線、撚り線、フェルール端子付き撚り線等の電気的接続部６１を挿入する挿通孔５２ｂが端子スプリング３８の傾斜板部３８ｃの先端側に対向させて貫通して形成されている。
また、端子部品収納部５２の上面における挿通孔５２ｂの前面側には、端子スプリング３８を押圧して電気的接続部６１から離間させるクランプ解除工具を挿通する挿通孔５２ｃが貫通して形成されている。 Further, on the rear end side of the upper surface of the terminal component storage portion 52, an insertion hole 52b for inserting an electrical connection portion 61 such as a single wire, a stranded wire, or a stranded wire with a ferrule terminal of the main terminal connection cable 60 is provided in the terminal spring 38. It is formed so as to face the tip end side of the inclined plate portion 38c and penetrate therethrough.
Further, an insertion hole 52c for inserting a clamp release tool that presses the terminal spring 38 to separate it from the electrical connection portion 61 is formed on the front surface side of the insertion hole 52b on the upper surface of the terminal component storage portion 52. There is.

同様に、端子部品収納部５３Ａ及び５３Ｂの上面の後端側には、補助端子接続ケーブル（図示せず）の単線、撚り線、フェルール端子付き撚り線等の電気的接続部を挿入する挿通孔５３ａが２つの端子スプリング４８と対向するように２つずつ形成されている。また、端子部品収納部５３Ａ及び５３Ｂの上面における挿通孔５３ａの前面側には端子スプリング４８を押圧して電気的接続部から離間させるクランプ解除工具を挿通する挿通孔５３ｂが２つずつ貫通して形成されている。 Similarly, on the rear end side of the upper surface of the terminal component storage portions 53A and 53B, an insertion hole for inserting an electrical connection portion such as a single wire, a stranded wire, or a stranded wire with a ferrule terminal of an auxiliary terminal connection cable (not shown) is inserted. Two 53a are formed so as to face the two terminal springs 48. Further, two insertion holes 53b for inserting a clamp release tool that presses the terminal spring 48 to separate it from the electrical connection portion penetrate through the front side of the insertion holes 53a on the upper surfaces of the terminal component storage portions 53A and 53B. It is formed.

次に、本発明の動作を説明する。
図４に示すねじ端子を有する熱動形過負荷リレー１０を、スプリング端子を有する熱動形過負荷リレーとして使用するには、先ず、図４及び図５に示すように、熱動形過負荷リレー１０の主端子１２ｉ（ｉ＝ｕ、ｖ、ｗ）に個別に主端子用端子部品３２を装着する。同様に、熱動形過負荷リレー１０の補助端子１４ｊ（ｊ＝ａ，ｂ）に個別に補助端子用端子部品３３Ａを装着し、さらに補助端子１４ｋ（ｋ＝ｃ、ｄ）に個別に補助端子用端子部品３３Ｂを装着する。 Next, the operation of the present invention will be described.
In order to use the thermal overload relay 10 having a screw terminal shown in FIG. 4 as a thermal overload relay having a spring terminal, first, as shown in FIGS. 4 and 5, the thermal overload relay is used. The main terminal component 32 is individually attached to the main terminal 12i (i = u, v, w) of the relay 10. Similarly, the auxiliary terminal components 33A are individually attached to the auxiliary terminals 14j (j = a, b) of the thermal overload relay 10, and the auxiliary terminals 14k (k = c, d) are individually attached to the auxiliary terminals. The terminal component 33B for mounting is attached.

主端子１２ｉに対して主端子用端子部品３２を装着するには、先ず、主端子１２ｉの端子板１５の雌ねじ部１８に螺合している端子ねじ１６を座金１９とともに取り外す。この状態で、主端子用端子部品３２から突出している被接続端子３７の端子部３７ａを端子板１５上に載置する。
このとき、端子板１５に形成された突条２０に被接続端子３７の端子部３７ａに形成された係合溝３７ｄを係合させる。端子板１５は、側壁１３ａ，１３ｆや隔壁１３ｂ〜１３ｅによって回転不能に固定されているので、主端子用端子部品３２が熱動形過負荷リレー１０の前端面に対して直角な前後方向に延長するように位置決めされる。 To mount the main terminal component 32 on the main terminal 12i, first, the terminal screw 16 screwed into the female screw portion 18 of the terminal plate 15 of the main terminal 12i is removed together with the washer 19. In this state, the terminal portion 37a of the connected terminal 37 protruding from the main terminal terminal component 32 is placed on the terminal plate 15.
At this time, the engagement groove 37d formed in the terminal portion 37a of the connected terminal 37 is engaged with the ridge 20 formed in the terminal plate 15. Since the terminal plate 15 is non-rotatably fixed by the side walls 13a and 13f and the partition walls 13b to 13e, the terminal component 32 for the main terminal extends in the front-rear direction perpendicular to the front end surface of the thermal overload relay 10. Positioned to.

この状態で、座金１９を装着した端子ねじ１６を被接続端子３７の貫通孔３７ｃを通じて端子板１５の雌ねじ部１８に螺合させて締め付ける。
このとき、作業者が端子ねじ１６の頭部に座金１９の上面が接触し、下面が被接続端子３７の端子部３７ａの上面に接触させた状態で、係合溝３７ｄが突条２０に係合を開始するまでの間は主端子用端子部品３２を手で保持しておく。その後は、作業者が主端子用端子部品３２の保持を解除して、端子ねじ１６の締め付けを行ったときに、係合溝３７ｄと突条２０とが係合していることにより、位置決めと回り止めの双方の機能を発揮して、端子ねじ１６の回転によって主端子用端子部品３２が回転することなく正確に位置決めされて固定される。したがって、主端子１２ｉに対する主端子用端子部品３２の装着作業を短時間で容易に行うことができる。 In this state, the terminal screw 16 to which the washer 19 is mounted is screwed into the female screw portion 18 of the terminal plate 15 through the through hole 37c of the connected terminal 37 and tightened.
At this time, the engaging groove 37d engages with the ridge 20 in a state where the upper surface of the washer 19 is in contact with the head of the terminal screw 16 and the lower surface is in contact with the upper surface of the terminal portion 37a of the connected terminal 37. The main terminal terminal component 32 is held by hand until the mating is started. After that, when the operator releases the holding of the terminal component 32 for the main terminal and tightens the terminal screw 16, the engaging groove 37d and the ridge 20 are engaged with each other, so that positioning is performed. By demonstrating both functions of detenting, the rotation of the terminal screw 16 causes the main terminal terminal component 32 to be accurately positioned and fixed without rotating. Therefore, the work of attaching the main terminal component 32 to the main terminal 12i can be easily performed in a short time.

この際、主端子１２ｉの端子板１５に形成した突条２０が側面から見て半円形状に形成されており、被接続端子３７の端子部３７ａに形成した係合溝３７ｄが側面から見て三角形状に形成されている。このため、突条２０及び係合溝３７ｄの断面形状が正確に成型されていない場合であっても、三角形状の係合溝３７ｄのセンタリング機能によって位置決め及び回り止めを正確に行うことができる。 At this time, the ridge 20 formed on the terminal plate 15 of the main terminal 12i is formed in a semicircular shape when viewed from the side surface, and the engaging groove 37d formed on the terminal portion 37a of the connected terminal 37 is viewed from the side surface. It is formed in a triangular shape. Therefore, even when the cross-sectional shapes of the ridge 20 and the engaging groove 37d are not accurately molded, the positioning and detenting can be accurately performed by the centering function of the triangular engaging groove 37d.

次いで、補助端子用端子部品３３Ｂを補助端子１４ｋに個別に装着する。この場合も補助端子１４ｋの端子板１５に突条２０が形成され、補助端子用端子部品３３Ｂの被接続端子４７に係合溝４７ｄが形成されている。このため、主端子１２ｉへの主端子用端子部品３２の装着と同様の手順で補助端子用端子部品３３Ｂを補助端子１４ｋに個別に装着することができる。この際に、突条２０と係合溝４７ｄとによって位置決め機能と回り止め機能とが発揮されて、補助端子１４ｋへの補助端子用端子部品３３Ｂの装着作業を短時間で容易に行うことができる。 Next, the auxiliary terminal terminal component 33B is individually attached to the auxiliary terminal 14k. Also in this case, the ridge 20 is formed on the terminal plate 15 of the auxiliary terminal 14k, and the engaging groove 47d is formed on the connected terminal 47 of the auxiliary terminal terminal component 33B. Therefore, the auxiliary terminal terminal component 33B can be individually mounted on the auxiliary terminal 14k in the same procedure as the mounting of the main terminal terminal component 32 on the main terminal 12i. At this time, the ridge 20 and the engaging groove 47d exert a positioning function and a detent function, so that the auxiliary terminal terminal component 33B can be easily attached to the auxiliary terminal 14k in a short time. ..

さらに、補助端子用端子部品３３Ａを補助端子１４ｊに個別に装着する。この場合も補助端子１４ｊの端子板１５に突条２０が形成され、補助端子用端子部品３３Ａの被接続端子４７に係合溝４７ｄが形成されている。このため、補助端子１４ｊへの補助端子用端子部品３３Ｂの装着と同様の手順で補助端子用端子部品３３Ａを補助端子１４ｊに個別に装着することができる。この際に、突条２０と係合溝４７ｄとによって位置決め機能と回り止め機能とが発揮されて、補助端子１４ｊへの補助端子用端子部品３３Ｂの装着作業を短時間で容易に行うことができる。 Further, the auxiliary terminal terminal component 33A is individually attached to the auxiliary terminal 14j. In this case as well, the ridge 20 is formed on the terminal plate 15 of the auxiliary terminal 14j, and the engaging groove 47d is formed on the connected terminal 47 of the auxiliary terminal terminal component 33A. Therefore, the auxiliary terminal terminal component 33A can be individually mounted on the auxiliary terminal 14j in the same procedure as the mounting of the auxiliary terminal terminal component 33B on the auxiliary terminal 14j. At this time, the ridge 20 and the engaging groove 47d exert a positioning function and a detent function, so that the auxiliary terminal terminal component 33B can be easily attached to the auxiliary terminal 14j in a short time. ..

このように、熱動形過負荷リレー１０の主端子１２ｕ〜１２ｗ及び補助端子１４ａ〜１４ｄに対して主端子用端子部品３２及び補助端子用端子部品３３Ａ，３３Ｂの装着を完了する。この状態では、図５及び図６に示すように、主端子用端子部品３２及び補助端子用端子部品３３Ａ，３３Ｂが前後方向に延長し、且つ左右方向に正確に整列されて保持される。 In this way, the main terminal terminal parts 32 and the auxiliary terminal terminal parts 33A and 33B are completely attached to the main terminals 12u to 12w and the auxiliary terminals 14a to 14d of the thermal overload relay 10. In this state, as shown in FIGS. 5 and 6, the main terminal terminal component 32 and the auxiliary terminal terminal components 33A and 33B extend in the front-rear direction and are accurately aligned and held in the left-right direction.

この状態では、熱動形過負荷リレー１０の主端子１２ｕ〜１２ｗ、補助端子１４ａ及び１４ｂ、主端子用端子部品３２の被接続端子３７及び端子スプリング３８及び補助端子用端子部品の被接続端子４７及び端子スプリング４８がむき出しとなっている。このため、主端子１２ｕ〜１２ｗ、補助端子１４ａ，１４ｂ、主端子用端子部品３２及び補助端子用端子部品３３Ａ，３３Ｂを覆うように端子カバー５１を装着する。 In this state, the main terminals 12u to 12w of the thermal overload relay 10, the auxiliary terminals 14a and 14b, the connected terminal 37 of the main terminal terminal component 32, the terminal spring 38, and the connected terminal 47 of the auxiliary terminal terminal component And the terminal spring 48 is exposed. Therefore, the terminal cover 51 is attached so as to cover the main terminals 12u to 12w, the auxiliary terminals 14a and 14b, the main terminal terminal parts 32, and the auxiliary terminal terminal parts 33A and 33B.

この端子カバー５１の装着は、先ず、端子カバー５１の各端子部品収納部５２を主端子用端子部品３２に対向させるとともに、端子部品収納部５３Ａ及び５３Ｂを補助端子用端子部品３３Ａ及び３３Ｂに対向させる。この状態で、端子カバー５１を熱動形過負荷リレー１０の背面側に押し込むことにより、庇部５５に形成された係合長孔５５ａ及び５５ｂに熱動形過負荷リレー１０の隔壁１３ｂ及び１３ｃに形成された係合部１３ｇが係合される。 To attach the terminal cover 51, first, each terminal component storage portion 52 of the terminal cover 51 faces the main terminal terminal component 32, and the terminal component storage portions 53A and 53B face the auxiliary terminal terminal parts 33A and 33B. Let me. In this state, by pushing the terminal cover 51 toward the back surface side of the thermal overload relay 10, the partition walls 13b and 13c of the thermal overload relay 10 are inserted into the engaging elongated holes 55a and 55b formed in the eaves 55. 13 g of the engaging portion formed in the above is engaged.

これと同時に、フック部５２ｄが主端子用端子部品３２の底面に形成された係合突起３５ａ１を乗り越えて係合突起３５ａ１が係合孔５７にスナップフィット係合される。さらに、端子部品収納部５３Ｂの下面に形成されたフック部５３ｄが補助端子用端子部品３３Ｂの底面に形成された係合突起４５ｘを乗り越えて係合突起４５ｘが係合孔５９にスナップフィット結合される。 At the same time, the hook portion 52d gets over the engaging projection 35a1 formed on the bottom surface of the main terminal terminal component 32, and the engaging projection 35a1 is snap-fit engaged with the engaging hole 57. Further, the hook portion 53d formed on the lower surface of the terminal component accommodating portion 53B overcomes the engaging projection 45x formed on the bottom surface of the auxiliary terminal component 33B, and the engaging projection 45x is snap-fitted to the engaging hole 59. To.

さらに、主端子用端子部品３２のＵ字状導電板部４７ｂに形成された係合板部３７ｂ４が端子部品収納部４２に形成された係合溝５２ａに係合する。
したがって、端子カバー５１が主端子用端子部品３２及び補助端子用端子部品３３Ａ，３３Ｂを介して熱動形過負荷リレー１０に取り外し不能に装着される。すなわち、補助端子用端子部品３３Ｂの絶縁ケース４５に形成された係合突起４５ｘが端子カバー５１の端子部品収納部５３Ｂの下面に形成された工具の挿入が不能な長溝５８の底部に形成された係合孔５９に係合されている。このため、長溝５８内に工具を挿入できないことから係合孔５９と係合突起４５ｘとの係合状態を離脱させることができず、長溝５８、係合孔５９、フック部５３ｄで抜け止め機構を構成し、端子カバー５１の取り外しが不能となる。 Further, the engaging plate portion 37b4 formed in the U-shaped conductive plate portion 47b of the main terminal terminal component 32 engages with the engaging groove 52a formed in the terminal component accommodating portion 42.
Therefore, the terminal cover 51 is irremovably attached to the thermal overload relay 10 via the main terminal terminal component 32 and the auxiliary terminal terminal components 33A and 33B. That is, the engaging projection 45x formed on the insulating case 45 of the auxiliary terminal terminal component 33B is formed on the bottom of the long groove 58 formed on the lower surface of the terminal component accommodating portion 53B of the terminal cover 51 and into which the tool cannot be inserted. It is engaged in the engagement hole 59. Therefore, since the tool cannot be inserted into the long groove 58, the engaged state between the engaging hole 59 and the engaging protrusion 45x cannot be disengaged, and the long groove 58, the engaging hole 59, and the hook portion 53d cannot be separated from the engaging state. The terminal cover 51 cannot be removed.

なお、端子カバー５１に覆われた主端子用端子部品３２及び補助端子用端子部品３３Ａ，３３Ｂの何れか１つが故障した場合には、端子カバー５１を壊して故障した端子部品を交換してから新たな端子カバー５１を装着する。
このように、端子カバー５１を装着することにより、図１〜図３に示す状態となり、主端子１２ｕ〜１２ｗ、補助端子１４ａ，１４ｂ、主端子用端子部品３２及び補助端子用端子部品３３Ａ，３３Ｂの導電部が全て覆われる。このため、感電事故を未然に防止することができる。また、主端子用端子部品３２、補助端子用端子部品３３Ａ，３３Ｂが端子カバー５１内に形成した絶縁隔壁５４によって絶縁されるので、各端子部品間の絶縁を確実に行うことができる。 If any one of the main terminal terminal component 32 and the auxiliary terminal terminal components 33A and 33B covered by the terminal cover 51 fails, the terminal cover 51 is broken and the failed terminal component is replaced. A new terminal cover 51 is attached.
By attaching the terminal cover 51 in this way, the states shown in FIGS. 1 to 3 are obtained, and the main terminals 12u to 12w, the auxiliary terminals 14a and 14b, the main terminal terminal parts 32 and the auxiliary terminal terminal parts 33A and 33B are obtained. All the conductive parts of are covered. Therefore, it is possible to prevent an electric shock accident. Further, since the main terminal terminal component 32 and the auxiliary terminal terminal components 33A and 33B are insulated by the insulating partition wall 54 formed in the terminal cover 51, the insulation between the terminal components can be reliably performed.

そして、ねじ端子を有する熱動形過負荷リレー１０に主端子用端子部品３２及び補助端子用端子部品３３Ａ，３３Ｂと端子カバー５１を装着することにより、ねじ端子を有する熱動形過負荷リレーを、スプリング端子を備えた熱動形過負荷リレーとすることができる。
この状態で、端子カバー５１の挿通孔５２ｂ及び５３ａに接続ケーブル６０の単線、撚り線、フェルール端子付き撚り線等の導電接続部を挿入して、端子スプリング３８及び４８をＵ字状導電板部３７ｂ及び４７ｂから離間させる。これにより、端子スプリング３８及び４８の先端が導電性接続部に接触して、導電性接続部が端子スプリング３８及び４８とＵ字状導電板部３７ｂ及び４７ｂとの間で挟持される。 Then, by mounting the terminal component 32 for the main terminal, the terminal components 33A and 33B for the auxiliary terminals, and the terminal cover 51 on the thermal overload relay 10 having the screw terminal, the thermal overload relay having the screw terminal is formed. , Can be a thermal overload relay with spring terminals.
In this state, a conductive connection portion such as a single wire, a stranded wire, or a stranded wire with a ferrule terminal of the connection cable 60 is inserted into the insertion holes 52b and 53a of the terminal cover 51, and the terminal springs 38 and 48 are inserted into the U-shaped conductive plate portion. Separate from 37b and 47b. As a result, the tips of the terminal springs 38 and 48 come into contact with the conductive connecting portions, and the conductive connecting portions are sandwiched between the terminal springs 38 and 48 and the U-shaped conductive plate portions 37b and 47b.

このとき、主端子用の接続ケーブル６０は単線や撚り線の径が太いので、端子スプリング３８及びＵ字状導電板部３７ｂ間に挟持させる際に、大きな力が必要となる。このため、主端子用端子部品３２の被接続端子３７の端子部３７ａとは反対側に片持ち荷重が掛かる。しかしながら、Ｕ字状導電板部３７ｂの底板部３７ｂ２の係合板部３７ｂ４が端子カバー５１の端子部品収納部５２の内面に形成された係合溝５２ａに係合している。このため、主端子用端子部品３２に掛かる片持ち荷重を端子カバー５１に分散させて支持することができ、被接続端子３７の端子部３７ａの変形を防止することができる。 At this time, since the connection cable 60 for the main terminal has a large diameter of a single wire or a stranded wire, a large force is required when sandwiching the connection cable 60 between the terminal spring 38 and the U-shaped conductive plate portion 37b. Therefore, a cantilever load is applied to the side of the main terminal terminal component 32 opposite to the terminal portion 37a of the connected terminal 37. However, the engaging plate portion 37b4 of the bottom plate portion 37b2 of the U-shaped conductive plate portion 37b is engaged with the engaging groove 52a formed on the inner surface of the terminal component accommodating portion 52 of the terminal cover 51. Therefore, the cantilever load applied to the main terminal terminal component 32 can be distributed and supported by the terminal cover 51, and the terminal portion 37a of the connected terminal 37 can be prevented from being deformed.

また、スプリング端子３９から接続ケーブル６０の電気的接続部６１を取り外すには、工具挿通孔５２ｃ（又は５３ｂ）にマイナスのネジ回し等の工具を差し込んで端子スプリング３８（又は４８）の傾斜板部３８ｃ（又は４８ｃ）を電気的接続部６１から離間させてロック状態を解除して電気的接続部６１を引き出す。
なお、上記実施形態では、端子板１５に突条２０を形成し、被接続端子３７及び４７に係合溝３７ｄ及び４７ｘを形成した場合について説明したが、これに限定されるものではなく、端子板１５に係合溝を形成し、被接続端子３７及び４７に突条を形成するようにしてもよい。
さらには、端子板１５に円筒部１７を挟んで突条と係合溝を形成し、被接続端子３７及び４７に突条に対向する係合溝と係合溝に対向する突条を形成するようにしてもよい。 Further, in order to remove the electrical connection portion 61 of the connection cable 60 from the spring terminal 39, a tool such as a minus screwdriver is inserted into the tool insertion hole 52c (or 53b), and the inclined plate portion of the terminal spring 38 (or 48) is inserted. The 38c (or 48c) is separated from the electrical connection portion 61 to release the locked state, and the electrical connection portion 61 is pulled out.
In the above embodiment, the case where the ridge 20 is formed on the terminal plate 15 and the engaging grooves 37d and 47x are formed on the connected terminals 37 and 47 has been described, but the present invention is not limited to this, and the terminal is not limited to this. An engaging groove may be formed in the plate 15, and a ridge may be formed in the connected terminals 37 and 47.
Further, the terminal plate 15 sandwiches the cylindrical portion 17 to form a ridge and an engaging groove, and the connected terminals 37 and 47 form an engaging groove facing the ridge and a ridge facing the engaging groove. You may do so.

さらに、突条２０及び係合溝３７ｄ，４７ｘの延長方向は任意に設定することができ、必ずしも端子ねじ１６の中心を通る必要はない。突条２０の断面形状と係合溝３７ｄの断面形状も互いに係合できれば任意の断面形状とすることができる。
また、上記実施形態では、図４に示すように、補助端子用端子部品３３Ａ及び補助端子用端子部品３３Ｂを熱動形過負荷リレー１０の補助端子１４ｊ及び１４ｋに装着した状態で、補助端子用端子部品３３Ｂが補助端子用端子部品３３Ａの後端から完全に露出している場合について説明した。しかしながら、本発明はこれに限定されるものではなく、補助端子用端子部品３３Ｂの露出領域を端子カバー５１の挿通孔５３ａ及び５３ｂを外部に望ませることができる程度に狭めるようにしてもよい。 Further, the extension directions of the ridge 20 and the engaging grooves 37d and 47x can be set arbitrarily, and it is not always necessary to pass through the center of the terminal screw 16. The cross-sectional shape of the ridge 20 and the cross-sectional shape of the engaging groove 37d can be any cross-sectional shape as long as they can be engaged with each other.
Further, in the above embodiment, as shown in FIG. 4, for the auxiliary terminal in a state where the auxiliary terminal terminal component 33A and the auxiliary terminal terminal component 33B are attached to the auxiliary terminals 14j and 14k of the thermal overload relay 10. The case where the terminal component 33B is completely exposed from the rear end of the auxiliary terminal terminal component 33A has been described. However, the present invention is not limited to this, and the exposed area of the auxiliary terminal terminal component 33B may be narrowed to such an extent that the insertion holes 53a and 53b of the terminal cover 51 can be desired to the outside.

また、上記実施形態では、熱動形過負荷リレー１０と主端子用端子部品３２及び補助端子用端子部品３３Ａ，３３Ｂとを接続する場合の接続構造について説明したが、これに限定されるものではなく、電気機器のねじ端子に被接続端子を有する電気機器を接続する場合に本発明を適用することができる。
また、上記実施形態では、電気機器として、熱動形過負荷リレーを適用した場合について説明したが、これに限定されるものではなく、電磁接触器、電磁リレー、その他のねじ端子を有する電気機器に本発明を適用することができる。この場合、主端子のみを有し補助端子を有さない電気機器にも本発明を適用することができる。 Further, in the above embodiment, the connection structure when the thermal overload relay 10 is connected to the main terminal terminal component 32 and the auxiliary terminal terminal components 33A and 33B has been described, but the present invention is not limited to this. Instead, the present invention can be applied when an electric device having a connected terminal is connected to a screw terminal of the electric device.
Further, in the above embodiment, the case where the thermal overload relay is applied as the electric device has been described, but the present invention is not limited to this, and the electric device has an electromagnetic contactor, an electromagnetic relay, and other screw terminals. The present invention can be applied to. In this case, the present invention can be applied to an electric device having only a main terminal and no auxiliary terminal.

１０…熱動形過負荷リレー、１１ｕ〜１１ｗ…外部接続ピン、１２ｕ〜１２ｗ…主端子、１３ａ，１３ｆ…側壁、１３ｂ〜１３ｅ…隔壁、１４ａ〜１４ｄ…補助端子、１５…端子板、１６…端子ねじ、１７…円筒部、１８…雌ねじ部、１９…座金、２０…突条、３１…スプリング端子部品、３２…主端子用端子部品、３３Ａ，３３Ｂ…補助端子用端子部品、３５…絶縁ケース、３６…環状周壁、３７…被接続端子、３７ａ…端子部、３７ｂ…Ｕ字状導電板部、３７ｂ４…係合板部、３７ｂ５…係合溝、３８…端子スプリング、４５…絶縁ケース、４５ｘ…係合突起、４６…環状周壁、４７…被接続端子、４７ｂ…Ｕ字状導電板部、４８…端子スプリング、５１…端子カバー、５２，５３Ａ，５３Ｂ…端子部品収納部、５４…絶縁隔壁、５５，５６…庇部、５５ａ，５５ｂ，５６ａ…係合長孔、５８…長溝、５９…係合孔、６０…接続ケーブル、６１…電気的接続部 10 ... Thermal overload relay, 11u to 11w ... External connection pin, 12u to 12w ... Main terminal, 13a, 13f ... Side wall, 13b to 13e ... Partition, 14a to 14d ... Auxiliary terminal, 15 ... Terminal plate, 16 ... Terminal screw, 17 ... Cylindrical part, 18 ... Female thread part, 19 ... Washer, 20 ... Spike, 31 ... Spring terminal part, 32 ... Main terminal terminal part, 33A, 33B ... Auxiliary terminal terminal part, 35 ... Insulation case , 36 ... annular peripheral wall, 37 ... connected terminal, 37a ... terminal part, 37b ... U-shaped conductive plate part, 37b4 ... engaging plate part, 37b5 ... engaging groove, 38 ... terminal spring, 45 ... insulating case, 45x ... Engagement protrusion, 46 ... annular peripheral wall, 47 ... connected terminal, 47b ... U-shaped conductive plate part, 48 ... terminal spring, 51 ... terminal cover, 52, 53A, 53B ... terminal component storage part, 54 ... insulating partition wall, 55, 56 ... Eaves, 55a, 55b, 56a ... Engagement slot, 58 ... Long groove, 59 ... Engagement hole, 60 ... Connection cable, 61 ... Electrical connection

Claims (6)

電気機器に形成されたねじ端子と、被接続部材に形成された被接続端子とを電気的に接続する電気機器の接続構造であって、
前記ねじ端子及び前記被接続端子に互いに係合する回り止め機構を設け、
前記ねじ端子は、雌ねじ部を形成した端子板と、前記雌ねじ部に螺合する端子ねじとを有し、前記端子板の前記被接続端子との接合面に、前記雌ねじ部の中心を通って前記雌ねじ部の半径方向に延長する前記回り止め機構を構成する第１係合部が形成され、
前記被接続端子は、前記端子ねじを挿通する挿通孔を有し、前記ねじ端子との接合面に、前記挿通孔の中心を通って前記挿通孔の半径方向に延長し、前記第１係合部に係合する前記回り止め機構を構成する第２係合部が形成されている電気機器の接続構造。 It is a connection structure of an electric device that electrically connects a screw terminal formed on an electric device and a connected terminal formed on a connected member.
A detent mechanism that engages with the screw terminal and the connected terminal is provided .
The screw terminal has a terminal plate on which a female screw portion is formed and a terminal screw screwed into the female screw portion, and passes through the center of the female screw portion to a joint surface of the terminal plate with the connected terminal. A first engaging portion constituting the detent mechanism extending in the radial direction of the female screw portion is formed.
The connected terminal has an insertion hole through which the terminal screw is inserted, extends to the joint surface with the screw terminal through the center of the insertion hole in the radial direction of the insertion hole, and the first engagement. A connection structure for an electric device in which a second engaging portion forming the detent mechanism that engages the portion is formed. 前記第１係合部及び前記第２係合部は、一方は係合突条で構成され、他方は前記係合突条に係合する係合溝で構成されている請求項１に記載の電気機器の接続構造。 The first engaging portion and the second engaging portion according to claim 1 , wherein one is composed of an engaging ridge and the other is composed of an engaging groove that engages with the engaging ridge. Connection structure of electrical equipment. 前記被接続部材は、前記被接続端子に電気的に接続されたスプリング端子を有する請求項１又は２に記載の電気機器の接続構造。 Wherein the connecting member prior Symbol connecting structure of electrical equipment according to claim 1 or 2 having electrically connected to the spring terminal connected terminals. 前記被接続部材を前記ねじ端子に接続した状態で当該被接続部材を覆う端子カバーを備えている請求項１から３の何れか一項に記載の電気機器の接続構造。 The connection structure for an electric device according to any one of claims 1 to 3, further comprising a terminal cover that covers the connected member in a state where the connected member is connected to the screw terminal. 前記ねじ端子は複数設けられ、複数のねじ端子に個別に前記被接続部材が接続され、前記端子カバーは複数の前記被接続部材を纏めて覆うように構成されている請求項４に記載の電気機器の接続構造。 The electricity according to claim 4 , wherein a plurality of the screw terminals are provided, the connected members are individually connected to the plurality of screw terminals, and the terminal cover is configured to collectively cover the plurality of connected members. Equipment connection structure. 前記被接続部材と前記端子カバーとの間に取り外し不能な抜け止め機構が設けられている請求項５に記載の電気機器の接続構造。 The connection structure for an electric device according to claim 5 , wherein a non-removable retaining mechanism is provided between the connected member and the terminal cover.
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