JP6813130B1 - Electromagnetic contactor - Google Patents

Electromagnetic contactor Download PDF

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JP6813130B1
JP6813130B1 JP2020515988A JP2020515988A JP6813130B1 JP 6813130 B1 JP6813130 B1 JP 6813130B1 JP 2020515988 A JP2020515988 A JP 2020515988A JP 2020515988 A JP2020515988 A JP 2020515988A JP 6813130 B1 JP6813130 B1 JP 6813130B1
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electric wire
insertion port
load
power supply
passage
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JPWO2021084732A1 (en
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裕児 佐渡
裕児 佐渡
林　亨
亨 林
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Mitsubishi Electric Corp
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/14—Terminal arrangements
    • 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

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Supporting Of Heads In Record-Carrier Devices (AREA)
  • Liquid Crystal (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

電磁接触器１は、接続端子１４が取り付けられた電線１５が挿入される電線挿入口８ａを有し、電線挿入口８ａから挿入される電線１５の通路である電線挿入通路Ｐ１を構成する筒部８ｄが形成された挿入口部材８を備える。また、電磁接触器１は、電線挿入通路Ｐ１から電線を引き抜く方向である引抜方向において挿入口部材８の筒部８ｄの端面と対向して当該電線挿入通路Ｐ１を構成する仕切板３ａが形成されており、導電性金具１１と、当該導電性金具１１に接続端子１４を圧接するスプリング１２と、を収容する第二筐体３を備える。挿入口部材８の筒部８ｄは、第二筐体３の仕切板３ａと対向する端面に、引抜方向に向けて形成された切り欠き８ｆを有する。The electromagnetic contactor 1 has a wire insertion port 8a into which the wire 15 to which the connection terminal 14 is attached is inserted, and is a tubular portion constituting the wire insertion passage P1 which is a passage of the wire 15 inserted from the wire insertion port 8a. The insertion port member 8 in which the 8d is formed is provided. Further, in the electromagnetic contactor 1, a partition plate 3a forming the electric wire insertion passage P1 is formed so as to face the end surface of the tubular portion 8d of the insertion port member 8 in the drawing direction in which the electric wire is pulled out from the electric wire insertion passage P1. It includes a second housing 3 that houses the conductive metal fitting 11 and the spring 12 that presses the connection terminal 14 against the conductive metal fitting 11. The tubular portion 8d of the insertion port member 8 has a notch 8f formed in the drawing direction on the end surface of the second housing 3 facing the partition plate 3a.

Description

本発明は、電流路の開閉を行う電磁接触器に関する。 The present invention relates to an electromagnetic contactor that opens and closes an electric current path.

電磁接触器は、電源と負荷機器との間の電流路に設置され、電流路の開閉を行うために用いられる。電磁接触器に設けられた導電性金具に電線を接続する接続方式として、一般に、被覆を剥いた電線をねじで導電性金具に締め付けるねじ方式、及び被覆を剥いた電線にフェルール等の接続端子を加締めた当該接続端子を導電性金具にスプリングの圧力により圧接するスプリング方式が知られている。 The magnetic contactor is installed in the current path between the power supply and the load device and is used to open and close the current path. As a connection method for connecting an electric wire to a conductive metal fitting provided in an electromagnetic contactor, generally, a screw method in which an uncoated electric wire is fastened to the conductive metal fitting with a screw, and a connection terminal such as a ferrule are attached to the uncoated electric wire. A spring method is known in which the crimped connection terminal is pressed against a conductive metal fitting by the pressure of a spring.

スプリング方式として、例えば特許文献１に記載の技術が知られている。特許文献１に記載の技術では、テストプラグを差し込むための開口であるテストプラグ開口を、操作工具を導入するための開口である操作工具開口に隣接させつつ、端子の中心線から側方にずらして配置することにより、電磁接触器の体格の小型化が図られている。 As a spring method, for example, the technique described in Patent Document 1 is known. In the technique described in Patent Document 1, the test plug opening, which is an opening for inserting a test plug, is moved laterally from the center line of the terminal while being adjacent to the operation tool opening, which is an opening for introducing an operation tool. The physique of the magnetic contactor is reduced by arranging the magnetic contactors.

特開２００２−３２４６１２号公報JP-A-2002-324612

ところで、近年、電磁接触器の筐体を複数の部品にて構成し、これら複数の部品のうち一部の部品についてねじ方式とスプリング方式とで同一の構造とすることにより、電磁接触器の製造コストの低減が図られている。 By the way, in recent years, the housing of an electromagnetic contactor is composed of a plurality of parts, and some of these parts have the same structure by the screw method and the spring method. Costs are being reduced.

スプリング方式の電磁接触器において、電線の通路である電線挿入通路が電線の引抜方向に複数の部品にて構成されている場合、これら複数の部品の製造ばらつきに起因して、電線挿入通路の引抜方向に段差が生じることがある。このような段差が生じると、接続端子が取り付けられた電線を電磁接触器から引き抜く際に、接続端子が段差に引っかかり、電線の引抜作業に係る作業性の低下を招くことがあった。 In a spring type magnetic contactor, when the electric wire insertion passage, which is the passage of the electric wire, is composed of a plurality of parts in the drawing direction of the electric wire, the electric wire insertion passage is pulled out due to the manufacturing variation of these multiple parts. There may be a step in the direction. When such a step is generated, when the electric wire to which the connection terminal is attached is pulled out from the magnetic contactor, the connection terminal may be caught in the step, which may lead to a decrease in workability related to the wire drawing work.

本発明は、上記に鑑みてなされたものであって、接続端子が取り付けられた電線の引抜作業に係る作業性低下の抑制を図ることができる電磁接触器を提供することを目的とする。 The present invention has been made in view of the above, and an object of the present invention is to provide an electromagnetic contactor capable of suppressing a decrease in workability related to a work of pulling out an electric wire to which a connection terminal is attached.

上記目的を達成するため、本開示では、電線よりも大径であって仕切板に当接する絶縁管を有する接続端子が取り付けられた電線が挿入される電線挿入口を有し、電線挿入口から挿入される電線の通路である電線挿入通路を構成する筒部が形成された挿入口部材と、電線挿入通路から電線を引き抜く方向である引抜方向において挿入口部材の筒部の端面と対向して当該電線挿入通路を構成する仕切板が形成されており、導電性金具と、当該導電性金具に接続端子を圧接するスプリングと、を収容する筐体と、を備え、挿入口部材の筒部は、筐体の仕切板と対向する端面に、引抜方向に向けて閉じるＶ字状に形成された切り欠きを有することとした。
In order to achieve the above object, in the present disclosure , the present disclosure has an electric wire insertion port into which an electric wire having a diameter larger than that of the electric wire and having a connection terminal having an insulating tube in contact with the partition plate is inserted, and from the electric wire insertion port. The insertion port member in which the tubular portion forming the electric wire insertion passage, which is the passage of the electric wire to be inserted, is formed, and the end face of the tubular portion of the insertion port member in the pulling direction, which is the direction in which the electric wire is pulled out from the electric wire insertion passage. A partition plate constituting the electric wire insertion passage is formed, and includes a conductive metal fitting and a housing for accommodating a spring for pressing a connection terminal to the conductive metal fitting, and a tubular portion of an insertion port member is provided. , It was decided to have a V-shaped notch that closes in the pulling direction on the end face facing the partition plate of the housing.

本発明に係る電磁接触器によれば、接続端子が取り付けられた電線の引き抜き作業に係る作業性低下の抑制を図ることができる。 According to the magnetic contactor according to the present invention, it is possible to suppress a decrease in workability related to a work of pulling out an electric wire to which a connection terminal is attached.

本発明に係る実施の形態の電磁接触器の斜視図Perspective view of the magnetic contactor of the embodiment according to the present invention 実施の形態の電磁接触器について、挿入口部材が取り外された状態を示す斜視図A perspective view showing a state in which the insertion port member is removed from the magnetic contactor of the embodiment. 実施の形態の電磁接触器の正面図Front view of the magnetic contactor of the embodiment 実施の形態の電磁接触器について、第二筐体が取り外された状態を示す正面図Front view showing a state in which the second housing is removed from the magnetic contactor of the embodiment. 実施の形態の電磁接触器について、図３のＩ−Ｉ線に沿った断面図A cross-sectional view of the magnetic contactor of the embodiment along the line I-I of FIG. 実施の形態の電磁接触器について、負荷用電線挿入口に１本の負荷用電線が挿入された状態を示す斜視図A perspective view showing a state in which one load electric wire is inserted into the load electric wire insertion port of the electromagnetic contactor of the embodiment. 実施の形態の電磁接触器について、負荷用電線挿入口に１本の電線が挿入された状態で図３のＩＩ−ＩＩ線に沿った断面図The cross-sectional view of the electromagnetic contactor of the embodiment along the line II-II of FIG. 3 in a state where one electric wire is inserted into the load electric wire insertion port. 実施の形態の電磁接触器について、負荷用電線挿入口に２本の電線が挿入された状態で図３のＩＩ−ＩＩ線に沿った断面図The cross-sectional view of the electromagnetic contactor of the embodiment along the line II-II of FIG. 3 in a state where two electric wires are inserted into the load electric wire insertion port. 実施の形態の電磁接触器について、工具挿入口に工具が差し込まれる前の状態を示す模式図Schematic diagram showing the state of the magnetic contactor of the embodiment before the tool is inserted into the tool insertion slot. 実施の形態の電磁接触器について、工具挿入口に工具が差し込まれた後の状態を示す模式図Schematic diagram showing a state after a tool is inserted into a tool insertion slot for the magnetic contactor of the embodiment. 実施の形態の電磁接触器について、電線挿入口から電線が引き抜かれた後の状態を示す模式図Schematic diagram showing a state after the electric wire is pulled out from the electric wire insertion port with respect to the magnetic contactor of the embodiment. 実施の形態の電磁接触器について、電線が挿入された状態を示す模式図Schematic diagram showing a state in which an electric wire is inserted with respect to the magnetic contactor of the embodiment. 実施の形態の電磁接触器について、絶縁管の端面がＶ字状に形成された切り欠きと２点で接触する状態を示す模式図Schematic diagram showing a state in which the end face of the insulating tube is in contact with a notch formed in a V shape at two points with respect to the magnetic contactor of the embodiment. 実施の形態の電磁接触器について、絶縁管の端面がＶ字状の切り欠きと１点で接触する状態を示す模式図Schematic diagram showing a state in which the end face of the insulating tube is in contact with a V-shaped notch at one point in the electromagnetic contactor of the embodiment. 実施の形態の電磁接触器について、段差を乗り越えた状態を示す模式図Schematic diagram showing a state of overcoming a step with respect to the magnetic contactor of the embodiment.

以下、本発明に係る実施の形態の電磁接触器を図面に基づいて詳細に説明する。なお、この実施の形態により本発明が限定されるものではない。 Hereinafter, the magnetic contactor of the embodiment according to the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment.

図１は、本発明に係る実施の形態の電磁接触器１の斜視図である。図２は、本実施の形態の電磁接触器１について、第一挿入口部材群８Ａ及び第二挿入口部材群８Ｂを取り外した状態を示す斜視図である。図３は、本実施の形態の電磁接触器１の正面図である。図４は、本実施の形態の電磁接触器１について、第二筐体３を取り外した状態を示す平面図である。 FIG. 1 is a perspective view of an electromagnetic contactor 1 according to an embodiment of the present invention. FIG. 2 is a perspective view showing a state in which the first insertion port member group 8A and the second insertion port member group 8B are removed from the electromagnetic contactor 1 of the present embodiment. FIG. 3 is a front view of the magnetic contactor 1 of the present embodiment. FIG. 4 is a plan view showing a state in which the second housing 3 is removed from the magnetic contactor 1 of the present embodiment.

まず、以下の説明に用いる座標系について説明する。電磁接触器１において、電源用電線挿入部５と負荷用電線挿入部６との配列方向である第１の方向を上下方向とする。また、第一筐体２と第二筐体３の配列方向であり、第１の方向と直交する第２の方向を前後方向とする。なお、上下方向において、電源用電線挿入部５が設けられている側が電磁接触器１の上方であり、負荷用電線挿入部６が設けられている側が電磁接触器１の下方である。また、前後方向において、第一筐体２が設けられている側が電磁接触器１の後方であり、第二筐体３が設けられている側が電磁接触器１の前方である。電磁接触器１の後方から前方に向かう方向において左手側が電磁接触器１の左方であり、電磁接触器１の後方から前方に向かう方向において右手側が電磁接触器１の右方である。以下、前後方向に伸びるＸ軸、左右方向に伸びるＹ軸、及び上下方向に伸びるＺ軸による座標系において、電磁接触器１の構造を説明する。なお、電磁接触器１を設置したときの姿勢によっては、電磁接触器１の上下方向と鉛直方向は一致しない場合がある。 First, the coordinate system used in the following description will be described. In the magnetic contactor 1, the first direction, which is the arrangement direction of the power supply electric wire insertion portion 5 and the load electric wire insertion portion 6, is the vertical direction. Further, the second direction, which is the arrangement direction of the first housing 2 and the second housing 3 and is orthogonal to the first direction, is the front-rear direction. In the vertical direction, the side where the power supply wire insertion portion 5 is provided is above the electromagnetic contactor 1, and the side where the load wire insertion portion 6 is provided is below the electromagnetic contactor 1. Further, in the front-rear direction, the side where the first housing 2 is provided is the rear side of the magnetic contactor 1, and the side where the second housing 3 is provided is the front side of the magnetic contactor 1. The left-hand side in the direction from the rear to the front of the magnetic contactor 1 is the left side of the magnetic contactor 1, and the right-hand side in the direction from the rear to the front of the magnetic contactor 1 is the right side of the magnetic contactor 1. Hereinafter, the structure of the electromagnetic contactor 1 will be described in a coordinate system based on an X-axis extending in the front-rear direction, a Y-axis extending in the left-right direction, and a Z-axis extending in the up-down direction. Depending on the posture when the magnetic contactor 1 is installed, the vertical direction and the vertical direction of the magnetic contactor 1 may not match.

図１〜図４に示すように、電磁接触器１の筐体１００は、主に、第一筐体２、第二筐体３、及び第三筐体４によって構成されており、これら第一筐体２、第二筐体３、及び第三筐体４は、絶縁材によって形成されている。第一筐体２には第二筐体３及び第三筐体４が取り付けられている。 As shown in FIGS. 1 to 4, the housing 100 of the magnetic contactor 1 is mainly composed of the first housing 2, the second housing 3, and the third housing 4, and these first housings 1 The housing 2, the second housing 3, and the third housing 4 are formed of an insulating material. A second housing 3 and a third housing 4 are attached to the first housing 2.

第一筐体２は、主に、図１〜図４では図示しない、後述の開閉部６０を収容する。この第一筐体２は、ねじ方式の電磁接触器とスプリング方式の電磁接触器とで同一の構造となっており、電磁接触器の製造コストの低減化が図られている。 The first housing 2 mainly accommodates an opening / closing portion 60, which will be described later, which is not shown in FIGS. 1 to 4. The first housing 2 has the same structure as the screw type magnetic contactor and the spring type magnetic contactor, and the manufacturing cost of the magnetic contactor is reduced.

第二筐体３は、絶縁材料で形成された第一挿入口部材群８Ａ及び第二挿入口部材群８Ｂを収容することにより、負荷機器に電力を供給する電源に接続される電源用電線が挿入される電源用電線挿入部群５Ａ、及び負荷機器に接続される負荷用電線が挿入される負荷用電線挿入部群６Ａを備える。詳しくは、第二筐体３は、複数（本実施の形態では５つ）の挿入口部材８が一列に配列され一体化された第一挿入口部材群８Ａを収容することにより、複数（本実施の形態では５つ）の電源用電線挿入部５が一列に配列された電源用電線挿入部群５Ａを備え、同様に、複数（本実施の形態では５つ）の挿入口部材８が一列に配列され一体化された第二挿入口部材群８Ｂを収容することにより、複数（本実施の形態では５つ）の負荷用電線挿入部６が一列に配列された負荷用電線挿入部群６Ａを備える。なお、電源用電線挿入部群５Ａ及び負荷用電線挿入部群６Ａはほぼ同一の構造であり、図３に示す電磁接触器１の中心を通る面αに対して対称に配置されている。また、以下の説明において特に区別する必要がない場合には、電源用電線挿入部群５Ａ及び負荷用電線挿入部群６Ａではなく、これらを構成する電源用電線挿入部５及び負荷用電線挿入部６を用いて説明する。また、電源用電線挿入部５に挿入される電源用電線、及び負荷用電線挿入部６に挿入される負荷用電線についても、特に区別する必要がない場合には、単に電線と記載する。また、電源用電線に取り付けられた接続端子、及び負荷用電線に取り付けられた接続端子は、請求の範囲に記載した、第１接続端子、及び第２接続端子にそれぞれ相当し、特に区別する必要がない場合には、単に接続端子と記載する。 The second housing 3 accommodates the first insertion port member group 8A and the second insertion port member group 8B formed of an insulating material, so that a power supply electric wire connected to a power source that supplies power to the load device is provided. The power supply electric wire insertion part group 5A to be inserted and the load electric wire insertion part group 6A into which the load electric wire connected to the load equipment is inserted are provided. Specifically, the second housing 3 accommodates a plurality of (five in the present embodiment) insertion port members 8 in a row and is integrated with the first insertion port member group 8A. The power supply wire insertion section 5A (five in the present embodiment) is provided in a row, and a plurality of (five in the present embodiment) insertion port members 8 are similarly arranged in a row. By accommodating the second insertion port member group 8B that is arranged and integrated in the above, a plurality of (five in the present embodiment) load wire insertion portions 6 are arranged in a row. To be equipped. The power supply electric wire insertion portion group 5A and the load electric wire insertion portion group 6A have substantially the same structure, and are arranged symmetrically with respect to the surface α passing through the center of the electromagnetic contactor 1 shown in FIG. Further, when it is not necessary to distinguish in the following description, the power supply wire insertion part 5 and the load wire insertion part 5A and the load wire insertion part 6A are not used instead of the power supply wire insertion part group 5A and the load wire insertion part group 6A. 6 will be described. Further, the power electric wire inserted into the power electric wire insertion portion 5 and the load electric wire inserted into the load electric wire insertion portion 6 are also simply described as electric wires when it is not necessary to distinguish them. Further, the connection terminal attached to the power supply electric wire and the connection terminal attached to the load electric wire correspond to the first connection terminal and the second connection terminal described in the claims, respectively, and it is necessary to distinguish them in particular. If there is no, it is simply described as a connection terminal.

第三筐体４は、第三挿入口部材群８Ｃを収容することにより、操作用電線が挿入される操作用電線挿入部群７Ａを備える。詳しくは、第三筐体４は、複数（本実施の形態では２つ）の挿入口部材８が一列に配列され一体化された第三挿入口部材群８Ｃを収容することにより、複数（本実施の形態では２つ）の操作用電線挿入部群７Ａを備える。なお、操作用電線挿入部群７Ａは、電源用電線挿入部群５Ａ及び負荷用電線挿入部群６Ａに準じた構造となっている。また、以下の説明において特に区別する必要がない場合には、操作用電線挿入部群７Ａではなく、これらを構成する操作用電線挿入部７を用いて説明する。同様に、操作用電線挿入部７に挿入される操作用電線についても、特に区別する必要がない場合には、単に電線と記載する。 The third housing 4 includes an operation wire insertion portion group 7A into which the operation wire is inserted by accommodating the third insertion port member group 8C. Specifically, the third housing 4 accommodates a plurality of (two in the present embodiment) insertion port members 8 in a row and is integrated with the third insertion port member group 8C. In the embodiment, two) operation wire insertion portions 7A are provided. The operation wire insertion section 7A has a structure similar to that of the power supply wire insertion section 5A and the load wire insertion section 6A. In addition, when it is not necessary to make a distinction in the following description, the operation wire insertion part 7 constituting these will be used instead of the operation wire insertion part group 7A. Similarly, the operation electric wire inserted into the operation electric wire insertion portion 7 is simply described as an electric wire when it is not necessary to distinguish between them.

図５は、本実施の形態の電磁接触器１について、図３のＩ−Ｉ線に沿った断面図である。この図５を用いてさらに詳述する。この図５に示されるように、電源用電線挿入部５及び負荷用電線挿入部６は、それぞれ、挿入口部材８と、スプリング式端子９と、筐体１００の一部をなすハウジング１０とを有する。スプリング式端子９は、第二筐体３に固定された導電性金具１１と、この導電性金具１１の先端部１１ａに係合するスプリング１２とで構成されている。スプリング式端子９は、電線の端部に取り付けられた接続端子１４を導電性金具１１の先端部１１ａとスプリング１２との間に挟むことで、スプリング１２の弾性力によって接続端子１４を導電性金具１１に圧接させ、導電性金具１１と電線１５とを電気的に接続する。なお、本実施の形態では、スプリング式端子９は、接続端子１４として絶縁管１３付きフェルールを直接挟むことで導通しているが、スプリング式端子９は、接続端子１４として絶縁管１３がついていないフェルールを直接挟むことで導通してもよい。絶縁管１３付きフェルールからなる接続端子１４については、図６〜図１５を用いて後述する。また、操作用電線挿入部７は、電源用電線挿入部５及び負荷用電線挿入部６に準じた構造を有するため、重複する説明を割愛する。なお、電源用電線挿入部５が有する挿入口部材８、導電性金具１１、及びスプリング１２が、請求の範囲に記載した、第１挿入口部材、第１導電性金具、及び第１スプリングにそれぞれ相当し、負荷用電線挿入部６が有する挿入口部材８、導電性金具１１、及びスプリング１２が、請求の範囲に記載した、第２挿入口部材、第２導電性金具、及び第２スプリングにそれぞれ相当する。 FIG. 5 is a cross-sectional view of the magnetic contactor 1 of the present embodiment along the line I-I of FIG. This will be described in more detail with reference to FIG. As shown in FIG. 5, the power supply electric wire insertion portion 5 and the load electric wire insertion portion 6 each have an insertion port member 8, a spring type terminal 9, and a housing 10 forming a part of the housing 100, respectively. Have. The spring type terminal 9 is composed of a conductive metal fitting 11 fixed to the second housing 3 and a spring 12 that engages with the tip end portion 11a of the conductive metal fitting 11. In the spring type terminal 9, the connection terminal 14 attached to the end of the electric wire is sandwiched between the tip end 11a of the conductive metal fitting 11 and the spring 12, and the elastic force of the spring 12 causes the connection terminal 14 to be connected to the conductive metal fitting. The conductive metal fitting 11 and the electric wire 15 are electrically connected to each other by pressure contact with 11. In the present embodiment, the spring type terminal 9 is electrically connected by directly sandwiching the ferrule with the insulating tube 13 as the connecting terminal 14, but the spring type terminal 9 does not have the insulating tube 13 as the connecting terminal 14. It may be conducted by directly sandwiching the ferrule. The connection terminal 14 made of a ferrule with an insulating tube 13 will be described later with reference to FIGS. 6 to 15. Further, since the operation electric wire insertion portion 7 has a structure similar to that of the power supply electric wire insertion portion 5 and the load electric wire insertion portion 6, a duplicate description is omitted. The insertion port member 8, the conductive metal fitting 11, and the spring 12 included in the power supply electric wire insertion portion 5 are attached to the first insertion port member, the first conductive metal fitting, and the first spring, which are described in the claims. Correspondingly, the insertion port member 8, the conductive metal fitting 11, and the spring 12 included in the load electric wire insertion portion 6 correspond to the second insertion port member, the second conductive metal fitting, and the second spring described in the claimed range. Each corresponds.

図３〜図５に示すように、挿入口部材８は、Ｙ方向の両端に配置される２つの電線挿入口８ａ、Ｙ方向の両端に配置される２つの工具挿入口８ｂ、及びＹ方向の中央に配置される１つの検電孔８ｃ等、複数の開口を有しており、これら複数の開口を電磁接触器１の正面に向けて、ハウジング１０及び第二筐体３に固定される。電磁接触器１に電線を配線する際、電線１５の端部に取り付けられた接続端子１４を挿入口部材８の電線挿入口８ａから内部へ挿入すると、挿入口部材８が筒状に形成されていることから、接続端子１４は、導電性金具１１の先端部１１ａとスプリング１２との間に案内される。スプリング１２の弾性力によって接続端子１４が導電性金具１１に圧接されることにより、電線１５と導電性金具１１とが電気的に接続される。一方、電磁接触器１から電線１５を引き抜く際、挿入口部材８の工具挿入口８ｂから工具を挿入すると、挿入口部材８が筒状に形成されていることから、工具は、スプリング１２と接続端子１４との間に案内される。工具によってスプリング１２が弾性変形することにより、当該スプリング１２と導電性金具１１との間に隙間が形成され、電線１５を取り外すことにより、電線１５と導電性金具１１との電気的な接続が解除される。なお、本実施の形態では、Ｙ方向の左方に配置される電線挿入口８ａとＹ方向左方に配置される工具挿入口８ｂとが対応するとともに、Ｙ方向の右方に配置される電線挿入口８ａとＹ方向右方に配置される工具挿入口８ｂとが対応しており、１つの挿入口部材８につき２本の電線を挿入することが可能である。また、電線と導電性金具１１との通電を確認する際、挿入口部材８の検電孔８ｃから検電針用通路Ｐ３に検電用の（図示しない）検電針を挿入すると、挿入口部材８が筒状に形成されていることから、検電針の先端はスプリング１２に接触する。これにより、導通を確認することが可能になる。なお、本実施の形態では、１つの検電孔８ｃに検電針を挿入することにより、２本の電線の導通を確認することが可能である。ハウジング１０は、導電性金具１１の先端部１１ａ及びスプリング１２を覆うように配置され、絶縁性を確保している。なお、電源用電線挿入部５が有する挿入口部材８に形成された電線挿入口８ａ及び負荷用電線挿入部６が有する挿入口部材８に形成された電線挿入口８ａが、請求の範囲に記載した、電源用電線挿入口及び負荷用電線挿入口にそれぞれ相当する。 As shown in FIGS. 3 to 5, the insertion port member 8 has two electric wire insertion ports 8a arranged at both ends in the Y direction, two tool insertion ports 8b arranged at both ends in the Y direction, and the Y direction. It has a plurality of openings such as one voltage detection hole 8c arranged in the center, and these plurality of openings are fixed to the housing 10 and the second housing 3 so as to face the front surface of the electromagnetic contactor 1. When wiring an electric wire to the magnetic contactor 1, when the connection terminal 14 attached to the end of the electric wire 15 is inserted into the inside from the electric wire insertion port 8a of the insertion port member 8, the insertion port member 8 is formed into a tubular shape. Therefore, the connection terminal 14 is guided between the tip portion 11a of the conductive metal fitting 11 and the spring 12. The connection terminal 14 is pressed against the conductive metal fitting 11 by the elastic force of the spring 12, so that the electric wire 15 and the conductive metal fitting 11 are electrically connected. On the other hand, when the electric wire 15 is pulled out from the electromagnetic contactor 1, when the tool is inserted from the tool insertion port 8b of the insertion port member 8, the insertion port member 8 is formed in a tubular shape, so that the tool is connected to the spring 12. It is guided to and from the terminal 14. The spring 12 is elastically deformed by the tool to form a gap between the spring 12 and the conductive metal fitting 11, and the electric connection between the electric wire 15 and the conductive metal fitting 11 is released by removing the electric wire 15. Will be done. In the present embodiment, the electric wire insertion port 8a arranged on the left side in the Y direction and the tool insertion port 8b arranged on the left side in the Y direction correspond to each other, and the electric wire arranged on the right side in the Y direction. The insertion port 8a and the tool insertion port 8b arranged on the right side in the Y direction correspond to each other, and it is possible to insert two electric wires into one insertion port member 8. Further, when confirming the energization between the electric wire and the conductive metal fitting 11, when a voltage detection needle (not shown) for voltage detection is inserted into the voltage detection needle passage P3 from the voltage detection hole 8c of the insertion port member 8, the insertion port is inserted. Since the member 8 is formed in a tubular shape, the tip of the voltage detection needle comes into contact with the spring 12. This makes it possible to confirm continuity. In the present embodiment, it is possible to confirm the continuity of the two electric wires by inserting the voltage detection needle into one voltage detection hole 8c. The housing 10 is arranged so as to cover the tip end portion 11a and the spring 12 of the conductive metal fitting 11 to ensure insulation. The electric wire insertion port 8a formed in the insertion port member 8 of the power supply electric wire insertion portion 5 and the electric wire insertion port 8a formed in the insertion port member 8 of the load electric wire insertion portion 6 are described in the claims. Corresponds to the power supply wire insertion port and the load wire insertion port, respectively.

図５に示すように、電磁接触器１は、電源用電線挿入部５の導電性金具１１と負荷用電線挿入部６の導電性金具１１とを電気的に接続するか絶縁するかを切り換える開閉部６０を有する。開閉部６０は、固定鉄心５２、操作コイル６６、及び可動鉄心５４によって構成される電磁石部６１と、クロスバー５７及び可動接触子４１を有する可動部６２とを備える。操作コイル６６は、固定鉄心５２の中央脚に巻回されている。可動鉄心５４は、固定鉄心５２と間隔をもって相対向して配置されている。クロスバー５７は、絶縁材料で形成され連結板５９を介して可動鉄心５４と連結されている。可動接触子４１は、クロスバー５７の頭部に設けた保持穴に配設されて、電源用電線挿入部５の導電性金具１１及び負荷用電線挿入部６の導電性金具１１のそれぞれと対向している。可動接触子４１が電源用電線挿入部５の導電性金具１１及び負荷用電線挿入部６の導電性金具１１の双方に接触することで電流が通電され、回路が形成される。電磁接触器１は、上述の通り、５つの電源用電線挿入部５、及び５つの負荷用電線挿入部６を備える。Ｙ方向における中央の３つの電源用電線挿入部５は、大電流を流す回路を開閉する主接点をなし、Ｙ方向における端部の２つの電源用電線挿入部５は、小電流を流す回路を開閉する補助接点をなす。また、Ｙ方向における中央の３つの負荷用電線挿入部６は、大電流を流す回路を開閉する主接点をなし、Ｙ方向における端部の２つの負荷用電線挿入部６は、小電流を流す回路を開閉する補助接点をなす。 As shown in FIG. 5, the electromagnetic contactor 1 opens and closes to switch between electrically connecting or insulating the conductive metal fitting 11 of the power wire insertion portion 5 and the conductive metal fitting 11 of the load electric wire insertion portion 6. It has a part 60. The opening / closing portion 60 includes an electromagnet portion 61 composed of a fixed iron core 52, an operating coil 66, and a movable iron core 54, and a movable portion 62 having a crossbar 57 and a movable contact 41. The operation coil 66 is wound around the central leg of the fixed iron core 52. The movable iron core 54 is arranged to face the fixed iron core 52 at intervals. The crossbar 57 is made of an insulating material and is connected to the movable iron core 54 via a connecting plate 59. The movable contact 41 is arranged in a holding hole provided in the head of the crossbar 57 and faces each of the conductive metal fitting 11 of the power wire insertion portion 5 and the conductive metal fitting 11 of the load electric wire insertion portion 6. doing. When the movable contact 41 comes into contact with both the conductive metal fitting 11 of the power wire insertion portion 5 and the conductive metal fitting 11 of the load electric wire insertion portion 6, a current is energized and a circuit is formed. As described above, the magnetic contactor 1 includes five power supply electric wire insertion portions 5 and five load electric wire insertion portions 6. The three central power supply wire insertion portions 5 in the Y direction form main contacts for opening and closing a circuit through which a large current flows, and the two power supply wire insertion portions 5 at the ends in the Y direction provide a circuit through which a small current flows. Makes an auxiliary contact that opens and closes. Further, the three central load wire insertion portions 6 in the Y direction form main contacts for opening and closing a circuit through which a large current flows, and the two load wire insertion portions 6 at the ends in the Y direction allow a small current to flow. It forms an auxiliary contact that opens and closes the circuit.

図６は、本実施の形態の電磁接触器１について、Ｙ方向中央に位置する負荷用電線挿入部６に１本の電線１５が挿入された状態を示す斜視図である。図６を併せ参照して、挿入口部材８及び第二筐体３の構造について詳述する。 FIG. 6 is a perspective view showing a state in which one electric wire 15 is inserted into the load electric wire insertion portion 6 located at the center in the Y direction of the electromagnetic contactor 1 of the present embodiment. The structures of the insertion slot member 8 and the second housing 3 will be described in detail with reference to FIG.

図２及び図６に示すように、挿入口部材８は、負荷用の電線挿入口８ａから挿入される負荷用の電線１５の通路である負荷用の電線挿入通路Ｐ１を構成する筒部８ｄ及び内壁部８ｅを有する。第二筐体３は、挿入口部材８の筒部８ｄ及び内壁部８ｅと当接して負荷用の電線挿入通路Ｐ１を構成する仕切板３ａを有する。挿入口部材８が第二筐体３に収容されることにより、挿入口部材８の筒部８ｄの底面及び内壁部８ｅの側面が第二筐体３の仕切板３ａの上面及び内面とそれぞれ当接し、負荷用の電線挿入通路Ｐ１が構成される。このように、電線１５の通路である電線挿入通路Ｐ１が電線１５の挿入方向（引抜方向でもある）に複数の部品にて構成されている。また、図６に示すように、挿入口部材８の筒部８ｄにおける第二筐体３の仕切板３ａとの当接面には、電線１５の引抜方向に向けて切り欠き８ｆが形成されている。切り欠き８ｆは、電線挿入通路Ｐ１の内面から外面まで連続してＶ字状に形成されている。すなわち、切り欠き８ｆは、第二筐体３の仕切板３ａの厚さ方向に形成されたＶ字状の貫通孔として、挿入口部材８の筒部８ｄに形成されている。なお、本実施の形態では、挿入口部材８の筒部８ｄの底面は、第二筐体３の仕切板３ａの上面と当接するが、必ずしも当接する必要はなく、挿入口部材８の筒部８ｄの底面は、第二筐体３の仕切板３ａの上面と対向すれば良い。挿入うち部材８の筒部８ｄの底面が、請求の範囲に記載した、挿入口部材の筒部の端面に相当する。また、挿入口部材８は、工具挿入口８ｂから挿入される工具の通路である工具挿入通路Ｐ２を構成する内壁部８ｇを有する。第二筐体３は、挿入口部材８の内壁部８ｇと当接して工具挿入通路Ｐ２を構成する凸部３ｂを有する。挿入口部材８が第二筐体３に収容されることにより、挿入口部材８の内壁部８ｇの内面が第二筐体３の凸部３ｂの側面と当接し、工具挿入通路Ｐ２が構成される。なお、電源用の電線挿入通路Ｐ１も、負荷用の電線挿入通路Ｐ１と同様に構成されることから、ここでの重複する説明を割愛する。なお、電源用電線挿入部５を構成する挿入口部材８が有する筒部８ｄ、切り欠き８ｆ、第二筐体３の電源用電線挿入部５を収容する空間を区画する仕切板３ａ、及び電源用電線挿入部５から電線１５を引き抜く引抜方向が、請求の範囲に記載した、第１筒部、第１切り欠き、第１仕切板、及び第１引抜方向にそれぞれ相当する。同様に、負荷用電線挿入部６を構成する挿入口部材８が有する筒部８ｄ、切り欠き８ｆ、第二筐体３の負荷用電線挿入部６を収容する空間を区画する仕切板３ａ、及び負荷用電線挿入部６から電線１５を引き抜く引抜方向が、請求の範囲に記載した、第２筒部、第２切り欠き、第２仕切板、及び第２引抜方向にそれぞれ相当する。また、電源用の電線挿入通路Ｐ１、及び負荷用の電線挿入通路Ｐ１は、請求の範囲に記載した、電源用電線挿入通路、及び負荷用電線挿入通路に、それぞれ相当する。 As shown in FIGS. 2 and 6, the insertion port member 8 includes a tubular portion 8d and a tubular portion 8d constituting a load electric wire insertion passage P1 which is a passage of the load electric wire 15 inserted from the load electric wire insertion port 8a. It has an inner wall portion 8e. The second housing 3 has a partition plate 3a that comes into contact with the tubular portion 8d and the inner wall portion 8e of the insertion port member 8 to form the electric wire insertion passage P1 for loading. Since the insertion port member 8 is housed in the second housing 3, the bottom surface of the tubular portion 8d and the side surface of the inner wall portion 8e of the insertion port member 8 are in contact with the upper surface and the inner surface of the partition plate 3a of the second housing 3, respectively. In contact with each other, the electric wire insertion passage P1 for the load is configured. As described above, the electric wire insertion passage P1 which is the passage of the electric wire 15 is composed of a plurality of parts in the insertion direction (also the pull-out direction) of the electric wire 15. Further, as shown in FIG. 6, a notch 8f is formed on the contact surface of the tubular portion 8d of the insertion port member 8 with the partition plate 3a of the second housing 3 in the drawing direction of the electric wire 15. There is. The notch 8f is continuously formed in a V shape from the inner surface to the outer surface of the electric wire insertion passage P1. That is, the notch 8f is formed in the tubular portion 8d of the insertion port member 8 as a V-shaped through hole formed in the thickness direction of the partition plate 3a of the second housing 3. In the present embodiment, the bottom surface of the tubular portion 8d of the insertion port member 8 abuts on the upper surface of the partition plate 3a of the second housing 3, but it is not always necessary to abut the tubular portion of the insertion port member 8. The bottom surface of 8d may face the upper surface of the partition plate 3a of the second housing 3. The bottom surface of the tubular portion 8d of the insertion member 8 corresponds to the end surface of the tubular portion of the insertion port member described in the claims. Further, the insertion port member 8 has an inner wall portion 8g constituting a tool insertion passage P2 which is a passage for a tool inserted from the tool insertion port 8b. The second housing 3 has a convex portion 3b that comes into contact with the inner wall portion 8g of the insertion port member 8 to form the tool insertion passage P2. When the insertion port member 8 is housed in the second housing 3, the inner surface of the inner wall portion 8g of the insertion port member 8 comes into contact with the side surface of the convex portion 3b of the second housing 3, and the tool insertion passage P2 is formed. To. Since the electric wire insertion passage P1 for the power supply is also configured in the same manner as the electric wire insertion passage P1 for the load, the duplicated description is omitted here. The tubular portion 8d and the notch 8f of the insertion port member 8 constituting the power supply electric wire insertion portion 5, the partition plate 3a for partitioning the space for accommodating the power supply electric wire insertion portion 5 of the second housing 3, and the power supply. The pull-out direction for pulling out the electric wire 15 from the electric wire insertion portion 5 corresponds to the first tubular portion, the first notch, the first partition plate, and the first pull-out direction described in the claimed range, respectively. Similarly, the tubular portion 8d and the notch 8f of the insertion port member 8 constituting the load electric wire insertion portion 6, the partition plate 3a for partitioning the space for accommodating the load electric wire insertion portion 6 of the second housing 3, and the partition plate 3a. The pull-out direction for pulling out the electric wire 15 from the load wire insertion portion 6 corresponds to the second cylinder portion, the second notch, the second partition plate, and the second pull-out direction described in the claimed range, respectively. Further, the electric wire insertion passage P1 for the power supply and the electric wire insertion passage P1 for the load correspond to the electric wire insertion passage for the power supply and the electric wire insertion passage for the load described in the claims, respectively.

ところで、スプリング方式の電磁接触器において、電線の通路である電線挿入通路が電線の引抜方向に複数の部品にて構成されている場合、これら複数の部品の製造ばらつきに起因して、電線挿入通路の内周面に段差が生じることがある。このような段差が生じると、接続端子が取り付けられた電線を電磁接触器から引き抜く際に、接続端子が段差に引っかかり、電線の引抜作業に係る作業性の低下を招くことがあった。以下、図７及び図８を用いて詳述する。なお、図７及び図８は、本実施の形態の電磁接触器１について、図３のＩＩ−ＩＩ線に沿った断面図であり、図７は、電磁接触器１に１本の電線１５が挿入された状態を示しており、図８は、電磁接触器１に２本の電線１５が挿入された状態を示している。ちなみに、図８に示す状態は、例えば同一の電源を複数の電磁接触器１にて共用する場合等に用いられる配線、いわゆる渡り配線をする際に生じる状態である。 By the way, in a spring type electromagnetic contactor, when the electric wire insertion passage, which is the electric wire passage, is composed of a plurality of parts in the wire pulling direction, the electric wire insertion passage is caused by the manufacturing variation of these plurality of parts. There may be a step on the inner peripheral surface of the cable. When such a step is generated, when the electric wire to which the connection terminal is attached is pulled out from the magnetic contactor, the connection terminal may be caught in the step, which may lead to a decrease in workability related to the wire drawing work. Hereinafter, it will be described in detail with reference to FIGS. 7 and 8. 7 and 8 are cross-sectional views of the magnetic contactor 1 of the present embodiment along the line II-II of FIG. 3, and FIG. 7 shows that one electric wire 15 is attached to the magnetic contactor 1. The inserted state is shown, and FIG. 8 shows a state in which two electric wires 15 are inserted into the magnetic contactor 1. Incidentally, the state shown in FIG. 8 is a state that occurs when wiring used when, for example, the same power supply is shared by a plurality of magnetic contactors 1, so-called crossover wiring.

図７において、電線１５が挿入されているＹ軸右方に位置する第二筐体３の仕切板３ａと、電線１５が挿入されていないＹ軸左方に位置する第二筐体３の仕切板３ａとの比較から分かるように、絶縁管１３が電線１５よりも大径であるため、Ｙ軸右方に位置する仕切板３ａは、電線１５に取り付けられた接続端子１４（詳しくは絶縁管１３）によって、電線挿入通路Ｐ１の内面から外面に向けて押し出され、挿入口部材８の筒部８ｄの底面と第二筐体３の内壁部２ａ上面との当接面に段差Ｄが生じることがある。このような段差Ｄが生じると、挿入口部材８の筒部８ｄの底面と第二筐体３の仕切板３ａ上面との当接面に切り欠き８ｆが形成されていない電磁接触器（従来技術に相当）では、接続端子１４が取り付けられた電線１５を電磁接触器から引き抜く際に、接続端子１４が段差Ｄに引っかかり、電線１５の引抜作業に係る作業性の低下を招くことがあった。なお、電線１５が段差Ｄに引っかかることを抑制するため、挿入口部材８の筒部８ｄの厚さを第二筐体３の仕切板３ａよりも薄くすることが考えられるものの、電線１５に取り付けられた接続端子１４によって電線挿入通路Ｐ１の内面から外面に向けて押し出される状況に変わりはなく、段差Ｄは発生するため、依然として改善の余地がある。また、挿入口部材８の筒部８ｄの底面に角部を丸めたアールを設けることが考えられるものの、金型構成上、非常に難しい。 In FIG. 7, the partition plate 3a of the second housing 3 located on the right side of the Y-axis in which the electric wire 15 is inserted and the partition plate 3 of the second housing 3 located on the left side of the Y-axis in which the electric wire 15 is not inserted. As can be seen from the comparison with the plate 3a, since the insulating pipe 13 has a larger diameter than the electric wire 15, the partition plate 3a located on the right side of the Y-axis has a connection terminal 14 attached to the electric wire 15 (specifically, the insulating pipe). By 13), the electric wire insertion passage P1 is pushed out from the inner surface toward the outer surface, and a step D is generated on the contact surface between the bottom surface of the tubular portion 8d of the insertion port member 8 and the upper surface of the inner wall portion 2a of the second housing 3. There is. When such a step D occurs, an electromagnetic contactor in which a notch 8f is not formed on the contact surface between the bottom surface of the tubular portion 8d of the insertion port member 8 and the upper surface of the partition plate 3a of the second housing 3 (conventional technique). In (corresponding to), when the electric wire 15 to which the connection terminal 14 is attached is pulled out from the magnetic contactor, the connection terminal 14 may be caught in the step D, which may lead to a decrease in workability related to the drawing work of the electric wire 15. Although it is conceivable that the thickness of the tubular portion 8d of the insertion port member 8 is thinner than that of the partition plate 3a of the second housing 3 in order to prevent the electric wire 15 from being caught in the step D, it is attached to the electric wire 15. There is still room for improvement because the connection terminal 14 is pushed out from the inner surface to the outer surface of the electric wire insertion passage P1 and a step D is generated. Further, although it is conceivable to provide a radius with rounded corners on the bottom surface of the tubular portion 8d of the insertion port member 8, it is very difficult due to the mold configuration.

また、図８に示す状態では、２本の電線１５のうちＹ軸右方に位置する電線１５の絶縁管１３のＹ軸右方側の側面は、Ｙ軸右方に位置する第二筐体３の仕切板３ａに当接しており、同様に、２本の電線１５のうちＹ軸左方に位置する電線１５の絶縁管１３のＹ軸左方側の側面は、Ｙ軸左方に位置する第二筐体３の仕切板３ａに当接している。そのため、２本の電線１５の絶縁管１３はＹ軸左右方向から押されて円弦形状となり、第二筐体３の仕切板３ａはＹ軸左右方向に押されて段差Ｄ１及びＤ２が図７の状態と比較して拡大する。このような段差Ｄ１及びＤ２が生じると、図７に示す状態と同様に、挿入口部材８の筒部８ｄの底面と第二筐体３の仕切板３ａ上面との当接面に切り欠き８ｆが形成されていない電磁接触器（従来技術に相当）では、接続端子１４が取り付けられた電線１５を電磁接触器から引き抜く際に、接続端子１４が段差Ｄ１及びＤ２に引っかかり、電線１５の引抜作業に係る作業性がさらに低下する。 Further, in the state shown in FIG. 8, the side surface of the insulating tube 13 of the electric wire 15 located on the right side of the Y axis of the two electric wires 15 on the right side of the Y axis is the second housing located on the right side of the Y axis. Similarly, the side surface of the insulating tube 13 of the electric wire 15 located on the left side of the Y axis of the two electric wires 15 is located on the left side of the Y axis, which is in contact with the partition plate 3a of 3. It is in contact with the partition plate 3a of the second housing 3. Therefore, the insulating pipes 13 of the two electric wires 15 are pushed from the left and right directions of the Y axis to form a circular string shape, and the partition plate 3a of the second housing 3 is pushed to the left and right directions of the Y axis, and steps D1 and D2 are shown in FIG. Enlarge compared to the state of. When such steps D1 and D2 occur, a notch 8f is formed in the contact surface between the bottom surface of the tubular portion 8d of the insertion port member 8 and the upper surface of the partition plate 3a of the second housing 3 as in the state shown in FIG. In an electromagnetic contactor (corresponding to the prior art) in which the connection terminal 14 is not formed, when the electric wire 15 to which the connection terminal 14 is attached is pulled out from the magnetic contactor, the connection terminal 14 is caught by the steps D1 and D2, and the electric wire 15 is pulled out. Workability related to the above is further reduced.

この点、本実施の形態の電磁接触器１では、図５及び図６を用いて上述したように、挿入口部材８の筒部８ｄは、第二筐体３の仕切板３ａと対向する当接面に、引抜方向に向けて形成された切り欠き８ｆを有し、当該切り欠き８ｆは、第二筐体３の仕切板３ａの厚さ方向に形成されたＶ字状の貫通孔として、挿入口部材８の筒部８ｄに形成されている。この構成による作用効果につき、図９〜図１５を用いて説明する。 In this regard, in the electromagnetic contactor 1 of the present embodiment, as described above with reference to FIGS. 5 and 6, the tubular portion 8d of the insertion port member 8 faces the partition plate 3a of the second housing 3. The contact surface has a notch 8f formed in the drawing direction, and the notch 8f serves as a V-shaped through hole formed in the thickness direction of the partition plate 3a of the second housing 3. It is formed in the tubular portion 8d of the insertion port member 8. The action and effect of this configuration will be described with reference to FIGS. 9 to 15.

図９は、電磁接触器１の電線挿入口８ａに電線１５が挿入されており、工具挿入口８ｂに工具Ｄｒが挿入される前の状態を示す模式図である。図１０は、電磁接触器１の電線挿入口８ａに電線１５が挿入されており、電磁接触器１の工具挿入口８ｂに工具Ｄｒが挿入された後の状態を示す模式図である。図１１は、電磁接触器１の工具挿入口８ｂに工具Ｄｒが挿入されており、電線挿入口８ａから電線１５が引き抜かれた後の状態を示す模式図である。なお、理解を容易にするため、これら図９〜図１１においては、挿入口部材８の図示を割愛している。 FIG. 9 is a schematic view showing a state in which the electric wire 15 is inserted into the electric wire insertion port 8a of the magnetic contactor 1 and before the tool Dr is inserted into the tool insertion port 8b. FIG. 10 is a schematic view showing a state after the electric wire 15 is inserted into the electric wire insertion port 8a of the magnetic contactor 1 and the tool Dr is inserted into the tool insertion port 8b of the electromagnetic contactor 1. FIG. 11 is a schematic view showing a state in which the tool Dr is inserted into the tool insertion port 8b of the electromagnetic contactor 1 and the electric wire 15 is pulled out from the electric wire insertion port 8a. In addition, in order to facilitate understanding, the illustration of the insertion opening member 8 is omitted in FIGS. 9 to 11.

また、図１２〜図１５は、図１０に示す状態から図１１に示す状態への遷移を示す図、すなわち、電磁接触器１の電線挿入口８ａから電線１５が引き抜かれていく状況を詳細に示す図である。詳しくは、図１２は、絶縁管１３の端面１３ａが切り欠き８ｆに到達する前の状態を示す模式図であり、図１３は、絶縁管１３の端面１３ａが切り欠き８ｆに到達し、当該切り欠き８ｆと２点で接触する状態を示す模式図であり、図１４は、絶縁管１３の端面が切り欠き８ｆと１点で接触する状態を示す模式図であり、図１５は、絶縁管１３の端面が段差を乗り越えた状態を示す模式図である。なお、理解を容易にするため、これら図１２〜図１５においては、工具Ｄｒの図示を割愛している。 Further, FIGS. 12 to 15 show in detail the transition from the state shown in FIG. 10 to the state shown in FIG. 11, that is, the situation in which the electric wire 15 is pulled out from the electric wire insertion port 8a of the magnetic contactor 1. It is a figure which shows. More specifically, FIG. 12 is a schematic view showing a state before the end surface 13a of the insulating tube 13 reaches the notch 8f, and FIG. 13 is a schematic view showing the state before the end surface 13a of the insulating tube 13 reaches the notch 8f. FIG. 14 is a schematic view showing a state in which the end face of the insulating tube 13 is in contact with the notch 8f at one point, and FIG. 15 is a schematic view showing a state in which the end face of the insulating tube 13 is in contact with the notch 8f at one point. It is a schematic diagram which shows the state which the end face of is over the step. In addition, in order to facilitate understanding, the illustration of the tool Dr is omitted in FIGS. 12 to 15.

電磁接触器１から電線を引き抜くにあたっては、まず、図９に示すように、図示しない挿入口部材８の工具挿入口８ｂから工具Ｄｒを挿入する。工具Ｄｒを工具挿入口８ｂから挿入すると、図１０に示すように、挿入口部材８が筒状に形成されていることから、工具Ｄｒは、挿入口部材８に案内され、スプリング１２の先端と接続端子１４との間に案内される。ここで、工具Ｄｒによってスプリング１２が弾性変形することにより、当該スプリング１２と導電性金具１１との間に隙間が形成される。隙間が形成されると、スプリング１２による接続端子１４への圧接が解除されるため、図１１に示すように、電線１５を取り外すことが可能となる。このようにして、電線１５と導電性金具１１との電気的な接続が解除される。 When pulling out the electric wire from the magnetic contactor 1, first, as shown in FIG. 9, the tool Dr is inserted from the tool insertion port 8b of the insertion port member 8 (not shown). When the tool Dr is inserted from the tool insertion port 8b, as shown in FIG. 10, since the insertion port member 8 is formed in a tubular shape, the tool Dr is guided by the insertion port member 8 and is guided to the tip of the spring 12. It is guided to and from the connection terminal 14. Here, the spring 12 is elastically deformed by the tool Dr, so that a gap is formed between the spring 12 and the conductive metal fitting 11. When the gap is formed, the pressure welding of the spring 12 to the connection terminal 14 is released, so that the electric wire 15 can be removed as shown in FIG. In this way, the electrical connection between the electric wire 15 and the conductive metal fitting 11 is released.

絶縁管１３の端面１３ａが筒部８ｄの切り欠き８ｆに到達する前の状態（図１２）から、挿入口部材８からの電線１５の引き抜きを開始すると、絶縁管１３の端面１３ａが、筒部８ｄの底面と第二筐体３の仕切板３ａ上面との当接面に生じた段差Ｄに干渉する。このとき、挿入口部材８の筒部８ｄの底面には電線１５の引抜方向に向けて切り欠き８ｆが形成されているため、図１３に示すように、挿入口部材８の筒部８ｄの底面と絶縁管１３の端面１３ａとは平行ではなく一定の角度をもって干渉する。すなわち、挿入口部材８の筒部８ｄの底面と絶縁管１３の端面１３ａとは、面で接触するのではなく、Ａ点として示す２点にて接触する。この２点で接触した状態においてさらに電線１５が引抜方向に引かれると、引抜方向に進行し、図１４に示すように、挿入口部材８の筒部８ｄの底面と絶縁管１３の端面１３ａとは点Ｂとして示す１点にて接触する。この１点で接触した状態においてさらに電線１５が引抜方向に引かれることで、接続端子１４が引抜方向に進行し、絶縁管１３の端面１３ａの段差Ｄへの引っ掛かりが外れ、図１５に示すように、電線１５が引き抜かれた状態となる。 When the wire 15 is pulled out from the insertion port member 8 from the state before the end surface 13a of the insulating tube 13 reaches the notch 8f of the tubular portion 8d (FIG. 12), the end surface 13a of the insulating tube 13 becomes the tubular portion. It interferes with the step D generated on the contact surface between the bottom surface of 8d and the upper surface of the partition plate 3a of the second housing 3. At this time, since a notch 8f is formed on the bottom surface of the tubular portion 8d of the insertion port member 8 in the pulling direction of the electric wire 15, as shown in FIG. 13, the bottom surface of the tubular portion 8d of the insertion port member 8 is formed. And the end surface 13a of the insulating tube 13 are not parallel to each other and interfere with each other at a constant angle. That is, the bottom surface of the tubular portion 8d of the insertion port member 8 and the end surface 13a of the insulating tube 13 do not come into contact with each other but at two points indicated as points A. When the electric wire 15 is further pulled in the pull-out direction in the state of contact at these two points, it advances in the pull-out direction, and as shown in FIG. 14, the bottom surface of the tubular portion 8d of the insertion port member 8 and the end surface 13a of the insulating tube 13 Contact at one point indicated as point B. When the electric wire 15 is further pulled in the pull-out direction in the state of contact at this one point, the connection terminal 14 advances in the pull-out direction, and the end surface 13a of the insulating tube 13 is disengaged from the step D, as shown in FIG. In addition, the electric wire 15 is pulled out.

以上説明した本実施の形態の電磁接触器１では、挿入口部材８の筒部８ｄにおける第二筐体３の仕切板３ａとの当接面には、電線１５の引抜方向に向けて切り欠き８ｆが形成されており、当該切り欠き８ｆは、第二筐体３の仕切板３ａの厚さ方向に形成されたＶ字状の貫通孔として、挿入口部材８の筒部８ｄに形成されていることとした。これにより、電線１５を引き抜く際、挿入口部材８の筒部８ｄの底面と絶縁管１３の端面１３ａとは平行ではなく一定の角度を保つことができるため、絶縁管１３の端面１３ａに生じる段差Ｄへの引っ掛かりが外れやすくなり、接続端子１４が取り付けられた電線１５の引き抜き作業に係る作業性低下の抑制を図ることができる。 In the electromagnetic contactor 1 of the present embodiment described above, the contact surface of the tubular portion 8d of the insertion port member 8 with the partition plate 3a of the second housing 3 is notched in the drawing direction of the electric wire 15. 8f is formed, and the notch 8f is formed in the tubular portion 8d of the insertion port member 8 as a V-shaped through hole formed in the thickness direction of the partition plate 3a of the second housing 3. I decided to be there. As a result, when the electric wire 15 is pulled out, the bottom surface of the tubular portion 8d of the insertion port member 8 and the end surface 13a of the insulating tube 13 can be maintained at a constant angle rather than parallel, so that a step generated on the end surface 13a of the insulating tube 13 can be maintained. The hook on the D is easily disengaged, and it is possible to suppress a decrease in workability related to the pulling work of the electric wire 15 to which the connection terminal 14 is attached.

なお、本実施の形態では、第二筐体３の仕切板３ａの厚さ方向に形成されたＶ字状の貫通孔として、挿入口部材８の筒部８ｄに形成されていたが、挿入口部材８の筒部８ｄの底面と絶縁管１３の端面１３ａとは平行ではなく一定の角度を保つことができれば、Ｖ字状の貫通孔に限られない。他に例えば、Ｕ字状の貫通孔としてもよい。これにより、樹脂部品を成形する場合に必要な金型の構造を簡略化することができるようにある。 In the present embodiment, the V-shaped through hole formed in the thickness direction of the partition plate 3a of the second housing 3 is formed in the tubular portion 8d of the insertion port member 8, but the insertion port If the bottom surface of the tubular portion 8d of the member 8 and the end surface 13a of the insulating tube 13 are not parallel and can be maintained at a constant angle, the hole is not limited to the V-shaped through hole. Alternatively, for example, a U-shaped through hole may be used. This makes it possible to simplify the structure of the mold required when molding the resin part.

また、本実施の形態では、切り欠き８ｆとして、Ｖ字状の貫通孔やＵ字状の貫通孔、すなわち、筒部８ｄの内面から外面まで連続して形成されている必要はない。少なくとも、段差Ｄ〜Ｄ２のＹ軸方向の幅（図７及び図８参照）の分だけ切り欠きが設けられていてもよい。これによっても、本実施の形態と同様の作用効果を得ることができる。 Further, in the present embodiment, the notch 8f does not need to be continuously formed from a V-shaped through hole or a U-shaped through hole, that is, from the inner surface to the outer surface of the tubular portion 8d. Notches may be provided at least by the width of the steps D to D2 in the Y-axis direction (see FIGS. 7 and 8). This also makes it possible to obtain the same effect as that of the present embodiment.

以上説明した本実施の形態（変形例を含む）の電磁接触器の構成は、本発明の内容の一例を示すものであり、別の公知の技術と組み合わせることが可能であり、本発明の要旨を逸脱しない範囲で、構成の一部を省略し、変更することが可能である。 The configuration of the magnetic contactor of the present embodiment (including the modified example) described above shows an example of the contents of the present invention, and can be combined with another known technique, and is a gist of the present invention. It is possible to omit and change a part of the configuration as long as it does not deviate from.

１ 電磁接触器、２ 第一筐体、３ 第二筐体、３ａ 仕切板、３ｂ 凸部、４ 第三筐体、５ 電源用電線挿入部、６ 負荷用電線挿入部、７ 操作用電線挿入部、８ 挿入口部材、８ａ 電線挿入口、８ｂ 工具挿入口、８ｃ 検電孔、８ｄ 筒部、８ｅ 内壁部、８ｆ 切り欠き、８ｇ 内壁部、８Ａ 第一挿入口部材群、８Ｂ 第二挿入口部材群、８Ｃ 第三挿入口部材群、９ スプリング式端子、１０ ハウジング、１１ 導電性金具、１１ａ 先端部、１２ スプリング、１３ 絶縁管、１３ａ 端面、１４ 接続端子、１５ 電線、４１ 可動接触子、５２ 固定鉄心、５４ 可動鉄心、５７ クロスバー、５９ 連結板、６０ 開閉部、６１ 電磁石部、６２ 可動部、６６ 操作コイル、１００ 筐体、Ｐ１ 電線挿入通路、Ｐ２ 工具挿入通路、Ｐ３ 検電針通路、Ｄ、Ｄ１、Ｄ２ 段差、Ｄｒ 工具。 1 Electromagnetic contactor, 2 1st housing, 3 2nd housing, 3a partition plate, 3b convex part, 4 3rd housing, 5 power supply wire insertion part, 6 load wire insertion part, 7 operation wire insertion part Part, 8 insertion port member, 8a wire insertion port, 8b tool insertion port, 8c voltage detection hole, 8d cylinder part, 8e inner wall part, 8f notch, 8g inner wall part, 8A first insertion port member group, 8B second insertion Mouth member group, 8C third insertion port member group, 9 spring type terminal, 10 housing, 11 conductive metal fittings, 11a tip, 12 spring, 13 insulation tube, 13a end face, 14 connection terminal, 15 electric wire, 41 movable contact , 52 Fixed core, 54 Movable core, 57 Crossbar, 59 Connecting plate, 60 Opening and closing part, 61 Electromagnet part, 62 Moving part, 66 Operating coil, 100 Housing, P1 Wire insertion passage, P2 Tool insertion passage, P3 Electrostatic detection Needle passage, D, D1, D2 step, Dr tool.

Claims (5)

電線よりも大径であって仕切板に当接する絶縁管を有する接続端子が取り付けられた前記電線が挿入される電線挿入口を有し、前記電線挿入口から挿入される前記電線の通路である電線挿入通路を構成する筒部が形成された挿入口部材と、
前記電線挿入通路から前記電線を引き抜く方向である引抜方向において前記挿入口部材の前記筒部の端面と対向して当該電線挿入通路を構成する仕切板が形成されており、導電性金具と、当該導電性金具に前記接続端子を圧接するスプリングと、を収容する筐体と、を備え、
前記挿入口部材の前記筒部は、前記筐体の前記仕切板と対向する前記端面に、前記引抜方向に向けて閉じるＶ字状に形成された切り欠きを有する
ことを特徴とする電磁接触器。 Has a wire insertion hole where the electric wire connecting terminal is attached with an insulating tube that abuts the A and partition plate larger in diameter is inserted than the wire, is the passage of the wire to be inserted from the wire insertion port An insertion port member in which a tubular portion constituting an electric wire insertion passage is formed, and
A partition plate forming the electric wire insertion passage is formed so as to face the end surface of the tubular portion of the insertion port member in the drawing direction which is the direction in which the electric wire is pulled out from the electric wire insertion passage. The conductive metal fitting is provided with a spring for pressing the connection terminal and a housing for accommodating the connection terminal.
The tubular portion of the insertion port member has a V-shaped notch formed in the end surface facing the partition plate of the housing so as to close in the pulling direction. .. 前記切り欠きは、前記筒部の内面から外面まで連続して形成されている
請求項１に記載の電磁接触器。 The notch is continuously formed from the inner surface to the outer surface of the tubular portion.
The electromagnetic contactor according to claim 1 . 前記挿入口部材には、工具が挿入される工具挿入口、及び前記工具挿入口から挿入される前記工具の通路である工具挿入通路が形成されている
請求項１又は２に記載の電磁接触器。 The electromagnetic contactor according to claim 1 or 2 , wherein the insertion port member is formed with a tool insertion port into which a tool is inserted and a tool insertion passage which is a passage for the tool inserted from the tool insertion port. .. 電源に一端が接続されるとともに電源用電線よりも大径であって第１仕切板に当接する絶縁管を有する第１接続端子が他端に取り付けられた前記電源用電線の前記他端が挿入される電源用電線挿入口を有し、前記電源用電線挿入口から挿入される前記電源用電線の通路である電源用電線挿入通路を構成する第１筒部が形成された第１挿入口部材と、
負荷機器に一端が接続されるとともに第２接続端子が他端に取り付けられた負荷用電線が挿入される負荷用電線挿入口を有し、前記負荷用電線挿入口から挿入される前記負荷用電線の通路である負荷用電線挿入通路を構成する第２筒部が形成された第２挿入口部材と、
前記電源用電線挿入通路から前記電源用電線を引き抜く方向である第１引抜方向において前記第１挿入口部材の前記第１筒部の端面に対向して当該電源用電線挿入通路を構成する前記第１仕切板と、前記負荷用電線挿入通路から前記負荷用電線を引き抜く方向である第２引抜方向において前記第２挿入口部材の前記第２筒部の端面と対向して当該負荷用電線挿入通路を構成する第２仕切板と、が形成されており、第１導電性金具と、当該第１導電性金具の一端に前記第１接続端子を圧接する第１スプリングと、第２導電性金具と、当該第２導電性金具の一端に前記第２接続端子を圧接する第２スプリングと、前記第１導電性金具の他端と前記第２導電性金具の他端とを電気的に接続するか絶縁するかを切り換える開閉部と、を収容する筐体と、を備え、
前記第１挿入口部材の前記第１筒部は、前記筐体の前記第１仕切板と対向する前記端面に、前記第１引抜方向に向けて閉じるＶ字状に形成された第１切り欠きを有する
ことを特徴とする電磁接触器。 The other end inserted in the power supply wires first connecting terminal is attached to the other end having an insulating tube than the power supply electric wire contacts the first partition a large diameter one end to the power supply is connected A first insertion port member having a power supply electric wire insertion port to be formed and having a first tubular portion forming a power supply electric wire insertion passage which is a passage of the power supply electric wire inserted from the power supply electric wire insertion port. When,
The load wire having one end connected to the load device and the load wire having the second connection terminal attached to the other end into which the load wire is inserted, and the load wire inserted from the load wire insertion port. A second insertion port member on which a second tubular portion forming a load electric wire insertion passage, which is a passage of the above, is formed.
The constituting opposite to the wire insertion path for that power to the end face of the first cylindrical portion of the first insertion port member in the first drawing direction is the direction to pull out the power supply wire from the wire insertion passage said power supply first The load wire insertion passage facing the end surface of the second cylinder portion of the second insertion port member in the second pull-out direction, which is the direction in which the load wire is pulled out from the partition plate and the load wire insertion passage. A second partition plate constituting the above is formed, and the first conductive metal fitting, the first spring that presses the first connection terminal to one end of the first conductive metal fitting, and the second conductive metal fitting. Whether to electrically connect the second spring that presses the second connection terminal to one end of the second conductive metal fitting, the other end of the first conductive metal fitting, and the other end of the second conductive metal fitting. It is equipped with an opening / closing part for switching between insulation and a housing for accommodating the housing.
The first tubular portion of the first insertion port member has a V-shaped first notch formed on the end surface of the housing facing the first partition plate so as to close in the first pull-out direction. An electromagnetic contactor characterized by having. 電源に一端が接続されるとともに第１接続端子が他端に取り付けられた電源用電線が挿入される電源用電線挿入口を有し、前記電源用電線挿入口から挿入される前記電源用電線の通路である電源用電線挿入通路を構成する第１筒部が形成された第１挿入口部材と、
負荷機器に一端が接続されるとともに負荷用電線よりも大径であって第２仕切板に当接する絶縁管を有する第２接続端子が他端に取り付けられた前記負荷用電線の前記他端が挿入される負荷用電線挿入口を有し、前記負荷用電線挿入口から挿入される前記負荷用電線の通路である負荷用電線挿入通路を構成する第２筒部が形成された第２挿入口部材と、
前記電源用電線挿入通路から前記電源用電線を引き抜く方向である第１引抜方向において前記第１挿入口部材の前記第１筒部の端面に対向して当該電源用電線挿入通路を構成する第１仕切板と、前記負荷用電線挿入通路から前記負荷用電線を引き抜く方向である第２引抜方向において前記第２挿入口部材の前記第２筒部の端面と対向して当該負荷用電線挿入通路を構成する前記第２仕切板と、が形成されており、第１導電性金具と、当該第１導電性金具の一端に前記第１接続端子を圧接する第１スプリングと、第２導電性金具と、当該第２導電性金具の一端に前記第２接続端子を圧接する第２スプリングと、前記第１導電性金具の他端と前記第２導電性金具の他端とを電気的に接続するか絶縁するかを切り換える開閉部と、を収容する筐体と、を備え、
前記第２挿入口部材の前記第２筒部は、前記筐体の前記第２仕切板と対向する前記端面に、前記第２引抜方向に向けて閉じるＶ字状に形成された第２切り欠きを有する
ことを特徴とする電磁接触器。 The power supply wire having one end connected to the power supply and the power supply wire having the first connection terminal attached to the other end into which the power supply wire is inserted, and the power supply wire inserted from the power supply wire insertion port. A first insertion port member on which a first cylinder portion constituting a power supply electric wire insertion passage, which is a passage, is formed, and
It said other end of the load cable to the second connection terminal having an insulating tube is attached to the other end than the load cable abuts the second partition plate a large diameter one end to the load device is connected A second insertion port having a load electric wire insertion port to be inserted and having a second tubular portion forming a load electric wire insertion passage which is a passage of the load electric wire inserted from the load electric wire insertion port. Members and
A first that constitutes the power supply electric wire insertion passage so as to face the end surface of the first cylinder portion of the first insertion port member in the first pull-out direction, which is the direction in which the power supply electric wire is pulled out from the power supply electric wire insertion passage. The load wire insertion passage is opposed to the end surface of the second cylinder portion of the second insertion port member in the second pull-out direction, which is the direction in which the load wire is pulled out from the partition plate and the load wire insertion passage. It said second partition plate constituting, are formed, a first conductive metal member, a first spring for pressing the first connecting terminals to one end of the first conductive metal member, and a second conductive metal member Whether to electrically connect the second spring that presses the second connection terminal to one end of the second conductive metal fitting, the other end of the first conductive metal fitting, and the other end of the second conductive metal fitting. It is equipped with an opening / closing part for switching between insulation and a housing for accommodating the housing.
The second tubular portion of the second insertion port member has a second notch formed in a V shape that closes in the second pull-out direction on the end surface of the housing facing the second partition plate. An electromagnetic contactor characterized by having.
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