JP4584774B2

JP4584774B2 - Terminal block and transformer equipped with this terminal block

Info

Publication number: JP4584774B2
Application number: JP2005161123A
Authority: JP
Inventors: 実河原
Original assignee: スワロー電機株式会社
Priority date: 2005-06-01
Filing date: 2005-06-01
Publication date: 2010-11-24
Anticipated expiration: 2025-06-01
Also published as: JP2006338991A

Description

本願発明は、端子台及びこの端子台を備えたトランスに関する。 The present invention relates to a terminal block and a transformer including the terminal block.

電気接続線の端子を固定する端子台において、端子台が備える電気導通板に、電気接続線を固定するネジの装着を容易とするため、例えば特許文献１に見られる電気接続具が提案されている。 In the terminal block for fixing the terminal of the electrical connection line, in order to facilitate the mounting of the screw for fixing the electrical connection line on the electrical conduction plate provided in the terminal block, for example, an electrical connection tool found in Patent Document 1 has been proposed. Yes.

特公平７−６０７０６号公報Japanese Patent Publication No. 7-60706

この電気接続具は、正面に線挿入用開口部と上面に操作用開口部とを有するケーシングと、ケーシング内に設けられた電気導通板と、座面を備え且つ上端にねじ回しを嵌合することが可能な頭部を備えたネジ（ビス）と、線材にて形成された引張コイルバネ（ばね部材）とを備える。上記の電気導通板は、上下に貫通するネジ穴を備え、上記の引張コイルバネは、ケーシング内にて上記の操作用開口部から電気導通板の上方にネジを吊下げるものであり、上記の線挿入開口部より電気導通板の上に電気接続線の端部を挿入し、操作用開口部からねじ回しの先端をケーシング内に挿入してネジを押し下げて電気導通板のネジ穴へネジを螺合することにより、電気接続線を電気導通板に接続することができる。 This electrical connector includes a casing having a wire insertion opening on the front surface and an operation opening on the upper surface, an electric conduction plate provided in the casing, a seating surface, and a screwdriver at the upper end. A screw (screw) having a head that can be mounted, and a tension coil spring (spring member) formed of a wire. The electrical conduction plate includes a screw hole penetrating vertically, and the tension coil spring suspends a screw from the operation opening above the electrical conduction plate in the casing. Insert the end of the electrical connection line onto the electrical conduction plate from the insertion opening, insert the tip of the screwdriver into the casing from the opening for operation, push down the screw, and screw the screw into the screw hole of the electrical conduction plate By combining, the electrical connection line can be connected to the electrical conduction plate.

上記の特許文献１に示された電気接続具が提案される以前は、電気導通板のネジ穴に螺合することにより電機接続線を電気導通板に固定する上記のネジは、ケーシングと別々にされており、端子の接続に際して、一々、指先で、電機導通板の上に電気接続線を乗せた状態にして、ねじ回しにより、電気導通板のネジ穴へ螺合しなければらなかった。即ち、端子の接続に際して、夫々別体の、電機導通板が設けられたケーシングと、電気接続線と、ネジとを、上記のネジ締めによって一体とする手間を取らなければならなかった。この作業は、小さなネジを所定の向きにしてネジ穴に螺合する際に、手元が狂って、ネジを落っことし、作業を幾度となくやり直す面倒を強いられるものであった。
上記の特許文献１に示された電気接続具は、このような点を改良すべく提案されたものであり、このものにあっては、ネジを、ケーシング内において、予め引張コイルにて電気導通板の上方に固定して吊下げておき、端子の接続に際して、ネジ回しにより上方から下方に向けてねじ回しを押し込むことにて、簡単にネジを電気導通板のネジ穴のある位置に合わせることができ、そのままねじ回しによりネジを旋回して上記のネジ穴へ螺合することができる。このように、この特許文献１に示された電気接続具は、ネジを指先で触れる必要なく、ねじ回しの操作だけで、ネジを電気導通板のネジ穴に装着でき、便利なものとされた。
このネジには、座金が押圧部材として装着されており、ネジを電気導電板へ締め付けてゆくことより、上記電気導電板と当該押圧部材とが電気接続線を挟持する。
上記のバネ下端の巻き部分が、ネジの座面に引っ掛けられてケーシング内にネジを吊下げている。 Before the electrical connector shown in Patent Document 1 is proposed, the screw for fixing the electrical connection line to the electrical conduction plate by screwing into the screw hole of the electrical conduction plate is separated from the casing. Therefore, when connecting the terminals, it was necessary to place the electrical connection line on the electrical conduction plate with a fingertip and to screw into the screw hole of the electrical conduction plate by screwing. That is, when connecting the terminals, it is necessary to take time and effort to integrate the casing, the electrical connection line, and the screw, which are separately provided, with the electric conduction plate, by the above-described screw tightening. In this operation, when a small screw is screwed into a screw hole in a predetermined direction, a hand is out of order, the screw is dropped, and the work is forced to be repeated over and over again.
The electrical connector disclosed in the above-mentioned Patent Document 1 has been proposed in order to improve such a point, and in this case, the screw is electrically connected to the casing in advance by a tension coil. It is fixed to the upper part of the board and hung, and when connecting the terminals, the screwdriver is pushed from the upper side to the lower side by screwing, so that the screw can be easily aligned with the screw holes on the electrical conduction plate. The screw can be turned and screwed into the screw hole as it is. As described above, the electrical connector shown in Patent Document 1 is convenient because the screw can be attached to the screw hole of the electrical conduction plate only by screwing operation without having to touch the screw with a fingertip. .
A washer is attached to the screw as a pressing member. By tightening the screw to the electric conductive plate, the electric conductive plate and the pressing member sandwich the electric connection line.
The winding portion at the lower end of the spring is hooked on the seat surface of the screw to suspend the screw in the casing.

しかし、ネジを締め付けて行くことによって、押圧部材は、ネジの座面との間隔を狭め、ネジの座面と押圧部材との間に位置する上記バネ下端の巻き部分が当該座面と押圧部材とに巻きを押しつぶされて、座面からはみ出し、ネジを脱落させてしまうという事態が生じた。 However, by tightening the screw, the pressing member narrows the space between the screw seating surface, and the winding portion of the lower end of the spring located between the screw seating surface and the pressing member becomes the seating surface and the pressing member. As a result, there was a situation where the winding was crushed and protruded from the seating surface, causing the screw to fall off.

本願発明は、引張バネにてネジが吊着された端子台において、ネジの形態を工夫することによって、上記課題の解決を図るものである。 The invention of the present application aims to solve the above problem by devising the form of the screw in the terminal block in which the screw is suspended by a tension spring.

そこで、本願第１の発明は、正面に線挿入用開口部２１と上面に操作用開口部２２とを有するケーシング２と、ケーシング２内に設けられた電気導通板３と、軸部４０と締め付け工具を嵌合することが可能な頭部４１とを有するネジ４と、線材を巻いた状態とすることにて形成された引張バネ５とを備え、上記のネジ４について上記頭部４１が座面を又は座金の装着にて座面を形成するものであり、上記の電気導通板３は、上下に貫通するネジ穴３１を備え、上記引張バネ５は、ケーシング２内にて電気導通板３の上方にネジ４を吊下げるものであり、上記の線挿入開口部２１より電気導通板３の上に電気接続線の端部を挿入し、操作用開口部２２から締め付け工具の先端をケーシング２内に挿入してネジ４を押し下げて電気導通板３のネジ穴３１へネジ４を螺合することにより、電気接続線を電気導通板３に接続することが可能な端子台１について、次の構成を採るものを提供する。
即ち、上記ネジ４には、ネジ４の上記軸部４０に装着され且つ電気導通板３と共に電気接続線を挟む押圧部材６が設けられている。上記の引張バネ５の一端がネジ４の上記座面に引っ掛けられることにて、当該引張バネ５は、ネジ４を吊下げるものである。上記ネジ４には、当りとして、上記押圧部材６が上記座面へ接近するのを制限する副座面が、上記座面とは別に設けられている。 Therefore, the first invention of the present application is the casing 2 having the line insertion opening 21 on the front surface and the operation opening 22 on the upper surface, the electric conduction plate 3 provided in the casing 2, the shaft portion 40 and the fastening portion. A screw 4 having a head 41 to which a tool can be fitted, and a tension spring 5 formed by winding a wire, and the head 41 is seated on the screw 4 A surface is formed by mounting a surface or a washer, and the electric conduction plate 3 includes a screw hole 31 penetrating vertically, and the tension spring 5 is electrically connected to the electric conduction plate 3 in the casing 2. The end of the electric connection line is inserted on the electric conduction plate 3 from the line insertion opening 21 and the tip of the tightening tool is connected to the casing 2 from the operation opening 22. Insert the inside and push down the screw 4 to screw the electrical conduction plate 3 By screwing the screw 4 to 31, the terminal block 1 capable of connecting the electrical connections to the electrical conductive plate 3, provide what adopting the following configuration.
That is, the screw 4 is provided with a pressing member 6 that is attached to the shaft portion 40 of the screw 4 and sandwiches the electric connection line together with the electric conduction plate 3. One end of the tension spring 5 is hooked on the seating surface of the screw 4, and the tension spring 5 suspends the screw 4. As a hit, the screw 4 is provided with a sub-seat surface that restricts the pressing member 6 from approaching the seat surface separately from the seat surface.

本願第２の発明は、上記本願第１の発明にあって、次の端子台を提供する。
即ち、上記ネジ４の軸方向を上下として、上記のネジ４の頭部４１は、軸部４０の上端に設けられている。ネジ４の当該頭部４１は、ネジ４の軸部４０より径が大きいものであり、ネジ４の上記の座面は、当該頭部と軸部との径の差による段差面である。ネジ４の軸部４０は、大径部位と、大径部位より下端側に位置し且つ大径部位より径の小さな小径部位とを備える。上記の副座面は、当該大径部位と小径部位との径の差による段差面である。上記の押圧部材６は、押圧部材６を上下に貫通し且つ上記ネジ４の軸部４０の小径部位が通される装着孔を備える。当該貫通孔の内径は、ネジ４の軸部４０の上記大径部位の径よりも小さい。 A second invention of the present application is the first invention of the present application, and provides the following terminal block.
That is, the head portion 41 of the screw 4 is provided at the upper end of the shaft portion 40 with the axial direction of the screw 4 being up and down. The head portion 41 of the screw 4 has a larger diameter than the shaft portion 40 of the screw 4, and the seating surface of the screw 4 is a stepped surface due to a difference in diameter between the head portion and the shaft portion. The shaft portion 40 of the screw 4 includes a large-diameter portion and a small-diameter portion that is located on the lower end side of the large-diameter portion and has a smaller diameter than the large-diameter portion. Said sub-seat surface is a level | step difference surface by the difference in the diameter of the said large diameter site | part and a small diameter site | part. The pressing member 6 includes a mounting hole that vertically penetrates the pressing member 6 and through which a small diameter portion of the shaft portion 40 of the screw 4 passes. The inner diameter of the through hole is smaller than the diameter of the large diameter portion of the shaft portion 40 of the screw 4.

本願第３の発明は、上記本願第１又は２の発明にあって、次の端子台を提供する。
上記の引張バネ５は、引張バネ５をケーシング２内へ固定する固定用巻き部と、ネジ４の座面と当接してネジ４を保持する保持用巻き部と、固定用巻き部と保持用巻き部との間に介された伸縮巻き部とを備える。上記の保持用巻き部が、上記ネジ４の座面に引っ掛けられて、ケーシング２内にて電気導通板３の上方にネジ４を吊下げるものである。 A third invention of the present application is the first or second invention of the present application, and provides the following terminal block.
The tension spring 5 includes a fixing winding portion that fixes the tension spring 5 into the casing 2, a holding winding portion that contacts the seat surface of the screw 4 and holds the screw 4, a fixing winding portion, and a holding portion A telescopic winding part interposed between the winding parts. The holding winding portion is hooked on the seat surface of the screw 4, and the screw 4 is suspended above the electric conduction plate 3 in the casing 2.

本願第４の発明は、上記本願第１乃至第３の何れかの発明に係る端子台１を備えたトランスを提供する。 A fourth invention of the present application provides a transformer including the terminal block 1 according to any one of the first to third inventions of the present application.

本願第１〜３の発明により、押圧部材が取り付けられたネジを締め付けることによって電気接続線を導電板と当該押圧部材との間に挟んで導電板へ結線するものであって、導電板への締め付け前、当該ネジは線材を巻くことにて形成された引張バネにてケーシング内に吊るされたものである端子台において、ネジを締め付けた際に、副座面が当りとなって、押圧部材が引張バネが引っ掛けられたネジの座面へ近づくのを制限するため、引張バネのネジの座面に引っ掛けられた部分が、ネジの座面と押圧部材とに挟まれて巻きが潰れてネジが引張バネから脱落するという事態を抑制した。 According to the first to third aspects of the present invention, the electrical connection line is sandwiched between the conductive plate and the pressing member by tightening the screw to which the pressing member is attached, and the conductive plate is connected to the conductive plate. Before tightening, when the screw is tightened in the terminal block that is suspended in the casing by a tension spring formed by winding a wire rod, the sub-seat surface comes into contact and the pressing member In order to restrict the tension spring from approaching the seat surface of the screw on which the tension spring is hooked, the portion of the tension spring hooked on the screw seat surface is sandwiched between the screw seat surface and the pressing member and the winding is crushed and the screw Suppressed the situation of falling off the tension spring.

又、本願第４の発明では、上記の効果を奏する端子台を備えたトランスを提供した。 In the fourth invention of the present application, a transformer provided with a terminal block having the above effects is provided.

以下、図面を参照しつつ、本願発明の好ましい実施の形態について、説明する。図１〜図８へ本願発明の一実施の形態に係るトランスを示す。
図１（Ａ）はこのトランスの全体正面図であり、図１（Ｂ）はこのトランスの全体側面図であり、図１（Ｃ）はこのトランスの全体平面図である。図２（Ａ）及び（Ｂ）は、このトランスに用いられる端子台のケーシングの要部斜視図である。図３（Ａ）は上記端子台のケーシングの上記と他の部位を示す要部側面図であり、図３（Ｂ）その底面図であり、図３（Ｃ）はその平面図であり、図３（Ｄ）はその背面図であり、図３（Ｅ）はその正面図である。図４（Ａ）は上記の端子台に用いられるネジの（押圧部材が覗かれた状態を示す）正面図であり、図４（Ｂ）は当該ネジに押圧部材が装着された状態を示す正面図である。図５（Ａ）は上記端子台に用いられる引張バネの斜視図であり、図５（Ｂ）はその平面図であり、図５（Ｃ）は当該バネとネジとの関係を示す正面図である。図６（Ａ）は図５に示す引張バネを図４（Ｂ）へ示すネジへ装着した状態を示す斜視図であり、図６（Ｂ）は図６（Ａ）に示すネジを図２（Ａ）へ示すケーシングの要部へ装着した状態を示す斜視図である。図７は図６（Ａ）へ示すネジを装着した状態を示す端子台の縦断面図であり、図８はその使用状態を示す縦断面図である。
説明の便宜上、各図中、Ｕは上方を、Ｓは下方を、Ｌは左側を、Ｒは右側を、Ｆは前方を、Ｂは後方を、夫々示している。 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. 1 to 8 show a transformer according to an embodiment of the present invention.
1A is an overall front view of the transformer, FIG. 1B is an overall side view of the transformer, and FIG. 1C is an overall plan view of the transformer. FIGS. 2A and 2B are perspective views of the main part of the casing of the terminal block used in this transformer. FIG. 3A is a side view of the main part showing the above and other parts of the casing of the terminal block, FIG. 3B is a bottom view thereof, and FIG. 3C is a plan view thereof. 3 (D) is a rear view thereof, and FIG. 3 (E) is a front view thereof. 4A is a front view of a screw used in the terminal block (showing a state where the pressing member is viewed), and FIG. 4B is a front view showing a state where the pressing member is attached to the screw. FIG. FIG. 5A is a perspective view of a tension spring used for the terminal block, FIG. 5B is a plan view thereof, and FIG. 5C is a front view showing a relationship between the spring and screws. is there. 6A is a perspective view illustrating a state in which the tension spring illustrated in FIG. 5 is attached to the screw illustrated in FIG. 4B, and FIG. 6B illustrates the screw illustrated in FIG. It is a perspective view which shows the state with which the principal part of the casing shown to A) was mounted | worn. FIG. 7 is a longitudinal sectional view of the terminal block showing a state where the screw shown in FIG. 6 (A) is mounted, and FIG. 8 is a longitudinal sectional view showing the usage state.
For convenience of explanation, in each figure, U indicates the upper side, S indicates the lower side, L indicates the left side, R indicates the right side, F indicates the front side, and B indicates the rear side.

図１に示す通り、このトランスは、トランス本体１００と、トランス本体１００に取り付けられる端子台１とを備える。
以下、各部の構成について、詳しく説明する。 As shown in FIG. 1, the transformer includes a transformer main body 100 and a terminal block 1 attached to the transformer main body 100.
Hereinafter, the configuration of each unit will be described in detail.

図１（Ａ）〜（Ｃ）へ示す通り、上記のトランス本体１００は、中空部分を備えたボビン１０１と、ボビン１０１の外側に巻かれたコイル１０２と、ボビン１０１の中空部分の少なくとも内側へ束ねて配された鉄心１０３と、鉄心固定具１０４…１０４と、端子台固定部１０５，１０５とを備える。
上記の鉄心固定具１０４…１０４は、図１（Ａ）へ示す通り、束ねられた鉄心１０３（の夫々が同一位置に備える貫通孔）へ通された長ネジと、長ネジと螺合する袋ネジ（一端が開口する軸内部に雌ネジ部が形成されている）とを備える。袋ネジは、長ネジの座面と共にその座面にて鉄心１０３の束を挟む。
上記の鉄心固定具１０４は、この実施の形態において、図１（Ａ）へ示す通り、鉄心１０３に対して、上部の２箇所と、下部の２箇所の、合計４箇所（図１（Ａ）に示すように、正面視した状態において、鉄心の四隅）に取り付けられている。
端子台固定部１０５は、束ねられた鉄心１０３の表面において、上記の上部の鉄心固定具１０４，１０４間へ水平に渡された、レールである。上記の通り、端子台固定部１０５の両端は、束ねられた鉄心１０３と共に鉄心固定具１０４，１０４にて当該鉄心１０３の表面に固定されている。当該鉄心固定具１０４，１０４間において、端子台固定部１０５は、（その長手方向と交差する方向にて切った）断面の形状をＬ字形とする部分を備える。
上記の端子台１…１は、この端子台固定部１０５に通されることによって、トランス本体１００へ固定される。
上記のトランス本体１００として、実公平５−６９９２７号や特開２０００２−３１３６５５号の公報に示すものを採用することができる。 As shown in FIGS. 1A to 1C, the transformer body 100 includes a bobbin 101 having a hollow portion, a coil 102 wound around the outside of the bobbin 101, and at least the inside of the hollow portion of the bobbin 101. A bundle of iron cores 103, iron core fixtures 104 ... 104, and terminal block fixing parts 105, 105 are provided.
As shown in FIG. 1A, the iron core fixtures 104... 104 are a long screw passed through a bundled iron core 103 (through holes provided at the same position) and a bag screwed into the long screw. And a screw (in which a female screw portion is formed inside the shaft having one end opened). The cap screw sandwiches the bundle of iron cores 103 along with the seat surface of the long screw.
As shown in FIG. 1A, the above-described iron core fixture 104 has a total of four locations (two in the upper part and two in the lower part with respect to the iron core 103 (FIG. 1A). As shown in Fig. 4, the iron core is attached to the four corners of the iron core when viewed from the front.
The terminal block fixing portion 105 is a rail that is horizontally passed between the upper iron core fixtures 104 and 104 on the surface of the bundled iron core 103. As described above, both ends of the terminal block fixing portion 105 are fixed to the surface of the iron core 103 by the iron core fixtures 104 and 104 together with the bundled iron core 103. Between the iron core fixtures 104, 104, the terminal block fixing portion 105 includes a portion having an L-shaped cross section (cut in a direction intersecting the longitudinal direction).
The terminal blocks 1... 1 are fixed to the transformer body 100 by passing through the terminal block fixing portion 105.
As the transformer main body 100, those shown in Japanese Utility Model Publication Nos. 5-69927 and 2000-2313655 can be employed.

上記の端子台１は、図７へ示す通り、ケーシング２と、電気導通板３と、ネジ４と、引張バネ５とを備える。ここでは、図１（Ｃ）において、トランス本体１００の前方Ｆ側に配置された端子台１を例に採って説明する。
上記のケーシング２は、樹脂にて形成された中空の筐体である。このケーシング２は、図２（Ａ）へ示す通り側板部ａと、図３（Ａ）〜（Ｅ）へ示す中央部ｂとを備える。中央部ｂは、図３（Ａ）〜（Ｅ）へ示す通り、水平部ｂ２と、水平部ｂ２前方より下方に伸びる正面部ｂ１とを備える。この正面部ｂ１には、正面部ｂ１の前後に貫通する線挿入用開口部２１が設けられている。線挿入用開口部２１は、接続線を通すことが可能な大きさ（断面積）を有する。また、上記の水平部ｂ２には、上下に貫通する操作用開口部２２が設けられている。操作用開口部２２は、ドライバの先端（シャフト）を通すことが可能な内径（断面積）を有する。
また、中央部ｂには、上記の側板部ａへ取り付けるための突起ｂ３…ｂ３が設けられている。 As shown in FIG. 7, the terminal block 1 includes a casing 2, an electrical conduction plate 3, a screw 4, and a tension spring 5. Here, in FIG. 1C, the terminal block 1 arranged on the front F side of the transformer main body 100 will be described as an example.
The casing 2 is a hollow casing made of resin. The casing 2 includes a side plate portion a as shown in FIG. 2 (A) and a central portion b shown in FIGS. 3 (A) to 3 (E). The center part b is provided with the horizontal part b2 and the front part b1 extended below from the front of the horizontal part b2, as shown to FIG. The front part b1 is provided with a line insertion opening 21 penetrating before and after the front part b1. The line insertion opening 21 has a size (cross-sectional area) through which the connection line can pass. The horizontal portion b2 is provided with an operation opening 22 penetrating vertically. The opening 22 for operation has an internal diameter (cross-sectional area) which can let the front-end | tip (shaft) of a driver pass.
Further, the central portion b is provided with protrusions b3... B3 for attaching to the side plate portion a.

図２（Ａ）へ示す通り、上記の側板部ａは縦に配される板状体であり、側面には、電気導通板３を支持する第１支持部ａ１と、引張バネ５を支持する第２支持部ａ２と、上記トランス本体１００の端子台固定部１０５を通すことが可能なＬ字貫通孔ａ３が設けられている。
上記の第１支持部ａ１は、側板部ａより側方（側板部ａが中央部ｂの左側に位置するものである場合右側、逆の場合左側）へ水平に突出する突出部ａ１０と、突出部ａ１０の上部に設けられた凹部ａ１１とを備える。
上記の第２支持部ａ２は、図２（Ａ）へ示す通り、第１支持部ａ１の上方に設けられ、側板部ａより第１支持部ａ１と同じ側方へ水平に突出する２つの支持突設部ａ２０，ａ２０を備える。この２つの支持突設部ａ２０，ａ２０は、間隔を開けて、前後に対向して配設されたものであり、夫々対向する面に、溝ａ２１，ａ２１を備える。溝ａ２１，ａ２１は、左右に真っ直ぐ伸びる。 As shown to FIG. 2 (A), said side plate part a is a plate-like body distribute | arranged vertically, and supports the 1st support part a1 which supports the electrical conduction board 3, and the tension | pulling spring 5 on a side surface. An L-shaped through hole a3 through which the second support part a2 and the terminal block fixing part 105 of the transformer main body 100 can pass is provided.
The first support portion a1 has a protrusion a10 that protrudes horizontally from the side plate portion a to the side (the right side when the side plate portion a is located on the left side of the central portion b, and the left side in the opposite case), And a recess a11 provided in the upper part of the part a10.
As shown in FIG. 2 (A), the second support part a2 is provided above the first support part a1, and has two supports protruding horizontally from the side plate part a to the same side as the first support part a1. Projecting portions a20, a20 are provided. The two support projecting portions a20, a20 are disposed facing each other at an interval and are provided with grooves a21, a21 on the opposed surfaces. The grooves a21 and a21 extend straight from side to side.

この実施の形態において、端子台１の夫々は、左右の一方（図１（Ａ）示したものは左側）のみに、側板部ａを備えるものであるが、図１へ示す通り、端子台１…１を端子台固定部１０５へ当該端子台固定部１０５の長手方向に沿って配列することにより、夫々隣の端子台１の側板部ａにて区画されるので、隣接する端子台１，１間の絶縁については問題ない。このため、図２（Ｂ）へ示す通り、側板部ａの第１及び第２支持部ａ１，ａ２が設けられたのと反対側の側面には、隣接する端子台１の側板部ａの第１及び第２支持部ａ１，ａ２の先端を受容する第１及び第２受容部ａ４，ａ５が設けられている。
この実施の形態と異なり、個々の端子台１は、中央部ｂの左右両側に側板部ａ，ａを備えるものとしても実施可能である。一方、図１へ示す実施の形態において、配列された端子台１…１の列の一方の端に位置する端子台１については、側板部ａが片方だけ（例えば左側だけ）では、内部が露出することになるので、当該端子台１ｂについて、図１（Ｃ）へ示す通り、別途の側板部ｄ（上記の左側の側板部ａに対して右側用）を用意する。尚、側板部ａ，ｄは、図示したものと左右反対であっても実施可能である。
また、側板部ａには、中央部ｂが備える上記突起ｂ３…ｂ３を受容する受容部ａ６…ａ６が設けられている。中央板ｂの上記突起ｂ３…ｂ３を側板部ａの受容部ａ６…ａ６へ挿入することによって、側板部ａへ中央部ｂを取り付けることができる。 In this embodiment, each of the terminal blocks 1 is provided with the side plate portion a on only one of the left and right sides (the one shown in FIG. 1A is the left side), but as shown in FIG. ... 1 are arranged on the terminal block fixing portion 105 along the longitudinal direction of the terminal block fixing portion 105, so that they are partitioned by the side plate portions a of the adjacent terminal blocks 1, so that the adjacent terminal blocks 1, 1 There is no problem with the insulation between them. For this reason, as shown to FIG. 2 (B), the 1st and 2nd support part a1, a2 of the side plate part a is provided in the side surface on the opposite side to the 1st of the side plate part a of the terminal block 1 adjacent. First and second receiving portions a4 and a5 for receiving the tips of the first and second support portions a1 and a2 are provided.
Unlike this embodiment, each terminal block 1 can also be implemented as having side plate portions a and a on both the left and right sides of the central portion b. On the other hand, in the embodiment shown in FIG. 1, with respect to the terminal block 1 positioned at one end of the array of the terminal blocks 1... 1 arranged, if the side plate portion a is only one side (for example, only the left side), the inside is exposed. Therefore, as shown in FIG. 1C, a separate side plate portion d (for the right side with respect to the left side plate portion a) is prepared for the terminal block 1b. The side plate portions a and d can be implemented even if they are opposite to the illustrated one.
Further, the side plate portion a is provided with receiving portions a6... A6 for receiving the projections b3... B3 provided in the central portion b. The center portion b can be attached to the side plate portion a by inserting the projections b3 to b3 of the center plate b into the receiving portions a6 to a6 of the side plate portion a.

上記の電気導通板３は、上下に貫通するネジ穴３１を備える金属板である。
図６（Ｂ）及び図７へ示す通り、端子台１の上記第１支持部ａ１に、この電気導通板３が取り付けられる。具体的には、電気導通板３は、第１支持部ａ１の突出部ａ１０の上に乗せられ、その左右端が上記凹部ａ１１及び第１受容部ａ４へ挿入されることによって、第１支持部ａ１へ取り付けられる。
また、上記のネジ４を保持する引張バネ５（図６（Ａ））が、上記第２支持部ａ２に取り付けられる。
図７へ示す通り、第２支持部ａ２（支持突設部ａ２０，ａ２０の間）は、上記の操作用開口部２２の真下に位置する。また、第１支持部ａ１は、第２支持部ａ２の下方にあり、電気導通板３の上記ネジ穴３１を操作用開口部２２の真下に（操作用開口部２２と同心に）配置させる。 The electrical conduction plate 3 is a metal plate provided with screw holes 31 penetrating vertically.
As shown in FIGS. 6B and 7, the electrical conduction plate 3 is attached to the first support part a 1 of the terminal block 1. Specifically, the electric conduction plate 3 is placed on the protruding portion a10 of the first support portion a1, and the left and right ends thereof are inserted into the concave portion a11 and the first receiving portion a4, whereby the first support portion. It is attached to a1.
A tension spring 5 (FIG. 6A) that holds the screw 4 is attached to the second support portion a2.
As shown in FIG. 7, the second support part a 2 (between the support projecting parts a 20 and a 20) is located directly below the operation opening 22. The first support part a1 is located below the second support part a2, and the screw hole 31 of the electrical conduction plate 3 is arranged directly below the operation opening 22 (concentrically with the operation opening 22).

以下、このネジ４と、このネジ４を吊下げる引張バネ５とについて、詳述する。
図４（Ａ）へ示す通り、ネジ４は、雄ねじを備える軸部４０と、座面４２を有し且つ上端にねじ回しを嵌合することが可能な嵌合部を有する頭部４１とを備える。頭部４１は、平面視円形の輪郭を有する。即ち、その座面４２（平面視した頭部４１）の輪郭は円形である。図４（Ａ）へ示す通り、軸部４０の上端に上記の頭部４１が設けられており、軸部４０には、頭部４１の上記座面４２と別に副座面４３が形成されている。 Hereinafter, the screw 4 and the tension spring 5 that suspends the screw 4 will be described in detail.
As shown to FIG. 4 (A), the screw 4 has the axial part 40 provided with an external thread, and the head 41 which has a seating surface 42 and has a fitting part which can fit a screwdriver in an upper end. Prepare. The head 41 has a circular outline in plan view. That is, the contour of the seating surface 42 (head 41 in plan view) is circular. As shown in FIG. 4A, the head portion 41 is provided at the upper end of the shaft portion 40, and a sub-seat surface 43 is formed on the shaft portion 40 separately from the seat surface 42 of the head portion 41. Yes.

ネジ４の上記頭部４１は、軸部４０より径が大きいものであり、ネジ４の上記の座面４２は、当該頭部４１と軸部４０との径の差による段差面である。座面４２は、ネジ４の軸方向と直交する平らな面である。ネジ４の上記軸部４０は、大径部位４０ａと、大径部位４０ａより下端側に位置し且つ大径部位４０ａより径の小さな小径部位４０ｂとを備える。上記の副座面４３は、当該大径部位４０ａと小径部位４０ｂとの径の差による段差面である。副座面４２は、ネジ４の軸方向と直交する平らな面である。
ネジ４の上記軸部４０の小径部位４０ｂには、押圧部材６が装着されている。図４（Ｂ）へ示す通り、この押圧部材６は、押圧部材６を上下に貫通しネジ４の軸部４０の小径部位４０ｂを通すことが可能な装着孔６０を備えた、座金である。図６（Ａ）へ示す通り、この実施の形態において、押圧部材６は平面視矩形の座金である。押圧部材６の下面６１には、電気導通板３との間にて、電気接続線を確実に保持するために、突起６２…６２が設けられている。この突起６２…６２は、図６（Ａ）へ示す通り、四角形の押圧部材６の各辺の中央部分と接するように４つ設けられている。
また、この実施の形態において、押圧部材６は、上記の通り、押圧部材６の下面６１において、矩形の四隅６３…６３が、上記突起６２…６２を除いて、押圧部材６の下面６１の他の部位よりも、下方に垂れた状態に形成されている。このように形成された平面視矩形の押圧部材６の角（隅６３…６３）も、上記の突起６２…６２と同様、押圧部材６と電気導通板３との間にて、電気接続線を確実に保持するのに功を奏する。
但し、押圧部材６について、上記の突起６２…６２を設けずに、また、各隅６３…６３を垂下させずに形成して実施することも可能である。 The head portion 41 of the screw 4 has a larger diameter than the shaft portion 40, and the seat surface 42 of the screw 4 is a stepped surface due to a difference in diameter between the head portion 41 and the shaft portion 40. The seat surface 42 is a flat surface orthogonal to the axial direction of the screw 4. The shaft portion 40 of the screw 4 includes a large-diameter portion 40a and a small-diameter portion 40b located on the lower end side of the large-diameter portion 40a and having a smaller diameter than the large-diameter portion 40a. Said sub-seat surface 43 is a level | step difference surface by the difference in the diameter of the said large diameter site | part 40a and the small diameter site | part 40b. The sub seat surface 42 is a flat surface orthogonal to the axial direction of the screw 4.
A pressing member 6 is attached to the small diameter portion 40 b of the shaft portion 40 of the screw 4. As shown in FIG. 4B, the pressing member 6 is a washer provided with a mounting hole 60 that penetrates the pressing member 6 in the vertical direction and allows the small diameter portion 40 b of the shaft portion 40 of the screw 4 to pass therethrough. As shown in FIG. 6A, in this embodiment, the pressing member 6 is a washer having a rectangular shape in plan view. Projections 62... 62 are provided on the lower surface 61 of the pressing member 6 in order to securely hold the electrical connection line with the electrical conduction plate 3. As shown in FIG. 6 (A), four protrusions 62... 62 are provided so as to be in contact with the central portion of each side of the rectangular pressing member 6.
In this embodiment, as described above, the pressing member 6 includes the rectangular four corners 63... 63 on the lower surface 61 of the pressing member 6 except for the protrusions 62. It is formed in a state that hangs downward from the part. The corners (corners 63... 63) of the rectangular pressing member 6 formed in this way are also connected to the electrical connection line between the pressing member 6 and the electrical conduction plate 3 in the same manner as the projections 62. It works well to hold it securely.
However, the pressing member 6 can be formed without the projections 62... 62 and without the corners 63.

上記押圧部材６の装着孔６０の内径は、ネジ４の軸部４０の上記大径部位４０ａの径よりも小さい。即ち、この押圧部材６の孔６０の内径よりも上記副座面４３の外径のほうが大きい。上記の副座面４３は、ネジ締めにより押し上げられた上記押圧部材６が、ネジの頭部４１（の座面４２）に近づきすぎないように設けられた当接部である。また、押圧部材６の下方への移動について、押圧部材６は、軸部４０のネジ山に係合するが、従来周知の方法により軸部４０に対して周回させてもネジのピッチに従って下方に自由に移動せず空回りするように形成しておく。これにて、押圧部材６は、軸部４０の下方へ脱落しない。 The inner diameter of the mounting hole 60 of the pressing member 6 is smaller than the diameter of the large-diameter portion 40 a of the shaft portion 40 of the screw 4. That is, the outer diameter of the sub-seat surface 43 is larger than the inner diameter of the hole 60 of the pressing member 6. The sub-seat surface 43 is a contact portion provided so that the pressing member 6 pushed up by screw tightening does not come too close to the screw head 41 (the seat surface 42). As for the downward movement of the pressing member 6, the pressing member 6 engages with the screw thread of the shaft portion 40. It is formed so as not to move freely but to rotate freely. Thus, the pressing member 6 does not fall down below the shaft portion 40.

上記の引張バネ５は、１本の金属の線材にて形成された引張りコイルバネである。図５（Ａ）へ示す通り、上方から順に、引張バネ５をケーシング２内へ固定する固定用巻き部５１と、伸縮巻き部５２と、ネジ４の座面４２と当接してネジ４を保持する保持用巻き部５３とを備える。
この実施の形態において、固定用巻き部５１は、図５（Ｂ）へ示す通り、引張バネ５において、平面視矩形に巻かれた区間であり、４つの直線部分５１ａ…５１ａ（辺）を備える。この実施の形態において、固定用巻き部５１は、引張バネ５を形成する線材を、２巻き（２回）矩形に巻くことによって、形成されている。
固定用巻き部５１が呈する上記の矩形において、１組の向い合う辺（直線部分５１ａ，５１ａ）間の幅（固定用巻き部５１の前後の幅）が、上記第２支持部ａ２０、ａ２０に設けられた溝ａ２１，ａ２１（の底）間の幅に対応する。 The tension spring 5 is a tension coil spring formed of a single metal wire. As shown in FIG. 5A, the fixing spring 51 for fixing the tension spring 5 into the casing 2, the expansion / contraction winding 52, and the seat surface 42 of the screw 4 are held in order from above to hold the screw 4. And holding winding portion 53.
In this embodiment, the fixing winding 51 is a section wound in a rectangular shape in plan view in the tension spring 5 as shown in FIG. 5 (B), and includes four linear portions 51a... 51a (sides). . In this embodiment, the fixing winding 51 is formed by winding the wire forming the tension spring 5 into a two-turn (twice) rectangle.
In the rectangle presented by the fixing winding portion 51, the width between the pair of opposing sides (straight line portions 51a, 51a) (the width before and after the fixing winding portion 51) is set to the second support portions a20, a20. This corresponds to the width between the provided grooves a21 and a21 (the bottom thereof).

上記伸縮用巻き部５２は、引張バネ５において、平面視円形に巻かれた区間である。この実施の形態において、伸縮用巻き部５２は、上記線材を５巻き（５回）巻くことによって、形成されている。
上記の保持用巻き部５３は、図５（Ｂ）へ示す通り、引張バネ５において、平面視円形に巻かれた区間である。この実施の形態において、保持用巻き部５３は、引張バネ５を形成する線材を、２巻き（２回）矩形に巻くことによって、形成されている。保持用巻き部５３の径（内径）は、上記のネジ４の座面４２（頭部４１）の径よりも小さい。このように形成されることによって、保持用巻き部５３に、ネジ４の頭部４１の座面４２が引っ掛けられて、図５（Ｃ）へ示す通り、ネジ４を吊下げることができる。
この保持用巻き部５３の軸方向（上下）の幅は、図４（Ａ）（Ｂ）へ示すネジ４の軸部４０の大径部位４０ａの軸方向（上下）幅ｔよりも小さい。即ち、当該大径部位４０ａの軸方向幅ｔ（座面４２と副座面４３との間隔）は、少なくとも上記引張バネ５の保持用巻き部５３の圧縮した状態（２重に巻かれた部分を潰れない状態であって最も密にした状態）において巻き部の軸方向幅よりも、大きい。
このように、座面４２と副座面４３との間隔を設定することによって、ネジ締めにより押圧部材６が副座面４３と当接した際、保持用巻き部５３が座面４２と副座面４３との間に挟まれて、その巻きが潰れ座面４２からはみ出すということがなく、ネジが引張バネ４から脱落するという事態を抑制し得た。
但し、大径部位４０ａの上記の軸方向幅ｔが、上記圧縮状態の保持用巻き部５３の軸方向幅よりも若干小さくても、保持用巻き部５３が上記座面４２から脱落しない程度にしか潰れないものであれば、これを除外するものではない。
上記の通り、このネジ４は、引張バネ５の引掛り部と、押圧部材６に対する当接部とを備える。即ち、このネジ４は、引張バネ５の引掛り部として上記の座面４２を、更に、押圧部材６の当接部として上記の副座面４３を備える。 The stretchable winding portion 52 is a section wound in a circular shape in plan view in the tension spring 5. In this embodiment, the stretchable winding portion 52 is formed by winding the wire rod 5 times (5 times).
The holding winding portion 53 is a section wound in a circular shape in plan view in the tension spring 5 as shown in FIG. In this embodiment, the holding winding portion 53 is formed by winding the wire forming the tension spring 5 into a two-turn (twice) rectangle. The diameter (inner diameter) of the holding winding portion 53 is smaller than the diameter of the seat surface 42 (head 41) of the screw 4. By forming in this way, the seating surface 42 of the head 41 of the screw 4 is hooked on the holding winding 53, and the screw 4 can be suspended as shown in FIG.
The axial width (up and down) of the holding winding portion 53 is smaller than the axial (up and down) width t of the large diameter portion 40a of the shaft portion 40 of the screw 4 shown in FIGS. That is, the axial width t (the interval between the seating surface 42 and the sub-seat surface 43) of the large-diameter portion 40a is at least a compressed state (a portion wound twice) of the holding winding portion 53 of the tension spring 5. In the most dense state) in which the winding portion is not crushed and is larger than the axial width of the winding portion.
In this way, by setting the distance between the seating surface 42 and the sub-seat surface 43, when the pressing member 6 comes into contact with the sub-seat surface 43 by screw tightening, the holding winding portion 53 is moved to the seating surface 42 and the sub-seat. It was possible to suppress a situation in which the screw was not crushed between the surface 43 and the winding was crushed and did not protrude from the seating surface 42, and the screw fell off from the tension spring 4.
However, even if the axial width t of the large-diameter portion 40a is slightly smaller than the axial width of the holding winding portion 53 in the compressed state, the holding winding portion 53 does not fall off the seat surface 42. If it can only be crushed, it is not excluded.
As described above, the screw 4 includes the hook portion of the tension spring 5 and the contact portion with the pressing member 6. That is, the screw 4 includes the seat surface 42 as a hooking portion of the tension spring 5 and the sub-seat surface 43 as a contact portion of the pressing member 6.

また、引張バネ４の各巻き部５１，５２，５３は、上記の実施の形態に示す巻き数に限定するものではなく、種々変更可能である。
ネジ４の座面４２は、ネジ４の頭部４１が備えるものとしたが、別途の座金をネジ４に装着することにより、当該座金が引張バネ５の引掛り部を提供するものとしても実施可能である。
更に、上記の実施の形態において、端子台１が備えるケーシング２は、側面部ａと正面部ｂとが別々に形成されて組み合わされるものであった。この他、側面部と正面部とは一体に形成されたものを採用して実施することも可能である。
また、上記の実施の形態において、端子台は、トランスに利用されるものを示した。但し、トランスへの利用に限定ものではなく、その他の電気機器や電気部品、電気接続線同士を電気的に接続する電気接続具に利用することも可能である。 Moreover, each winding part 51,52,53 of the tension spring 4 is not limited to the winding number shown in said embodiment, A various change is possible.
Although the seat surface 42 of the screw 4 is provided in the head 41 of the screw 4, it is also possible to attach a separate washer to the screw 4 so that the washer provides a catching portion of the tension spring 5. Is possible.
Furthermore, in said embodiment, the casing 2 with which the terminal block 1 is provided was formed by combining the side part a and the front part b separately. In addition, it is also possible to employ a side part and a front part formed integrally.
Moreover, in said embodiment, the terminal block showed what was utilized for a transformer. However, the present invention is not limited to use in a transformer, and can be used in other electrical devices, electrical components, and electrical connectors that electrically connect electrical connection lines.

製造時において、図６（Ａ）及び図７へ示す通り、上記の図４へ示すネジ４の座面４２の下に、上記図５へ示す引張バネ５の保持用巻き部５３が位置するよう、引張バネ５へネジ４を装着する。この装着に際して、引張バネ４には、押圧部材６が装着されているので、ネジ４の頭部４１を引張バネ５の保持用巻き部５３の下部より上方へ押し込み、保持用巻き部５３を強制的に押し広げて、当該頭部４１に保持用巻き部５３を潜らせる。頭部５３を潜った後、保持用巻き部５３が元の状態に戻り、当該頭部４１の座面４２に保持用巻き部５３が引っ掛かる。
そして、図６（Ｂ）及び図７へ示すように、引張バネ５の固定用巻き部５１の直線部分５１ａの一つを前記の一方の第１部突設部ａ２０の溝ａ２１へ、当該直線部分５１ａと向かい合う他の直線部分５１ａを他方の第１突設部ａ２０の溝ａ２１へ挿入する。これによって、固定用巻き部５１を第１支持部ａ２へ固定することができ、ケーシング２内にて、電気導通板３のネジ穴３１の上方に、ネジ４を吊下げることができる。
図８へ示す通り、上記の線挿入開口部２１より電気導通板３の上に電気接続線ｍの端部を挿入し、操作用開口部２２からねじ回し（図示せず。）の先端をケーシング２内に挿入してネジ４を押し下げて電気導通板のネジ穴３１へネジ４を螺合することにより、電気接続線ｍを電気導通板３と押圧部材６とにて挟み、電気接続線ｍを電気導通板３に接続することができる。
この際に、前述の通り、押圧部材６とネジ４の頭部４１の座面４２との間に挟まれて、引張バネ５のネジ４に引っ掛けられている部分（保持用巻き部５３）の巻きが潰れて、ネジ４が脱落するということがない。 At the time of manufacture, as shown in FIGS. 6A and 7, the holding winding portion 53 of the tension spring 5 shown in FIG. 5 is positioned below the seat surface 42 of the screw 4 shown in FIG. The screw 4 is attached to the tension spring 5. At this time, since the pressing member 6 is attached to the tension spring 4, the head 41 of the screw 4 is pushed upward from below the holding winding portion 53 of the tension spring 5 to force the holding winding portion 53. The holding winding part 53 is hidden in the head 41. After diving the head 53, the holding winding 53 returns to its original state, and the holding winding 53 is caught on the seating surface 42 of the head 41.
Then, as shown in FIGS. 6B and 7, one of the straight portions 51 a of the fixing winding 51 of the tension spring 5 is inserted into the groove a 21 of the one first protruding portion a 20. The other straight part 51a facing the part 51a is inserted into the groove a21 of the other first projecting part a20. As a result, the fixing winding 51 can be fixed to the first support portion a 2, and the screw 4 can be suspended above the screw hole 31 of the electrical conduction plate 3 in the casing 2.
As shown in FIG. 8, the end of the electrical connection line m is inserted onto the electrical conduction plate 3 from the line insertion opening 21 and the tip of a screwdriver (not shown) is screwed from the operation opening 22. 2, the screw 4 is pushed down and screwed into the screw hole 31 of the electric conduction plate, whereby the electric connection line m is sandwiched between the electric conduction plate 3 and the pressing member 6, and the electric connection line m Can be connected to the electrical conduction plate 3.
At this time, as described above, the portion of the portion (holding winding portion 53) sandwiched between the pressing member 6 and the seating surface 42 of the head portion 41 of the screw 4 and hooked on the screw 4 of the tension spring 5. The winding is not crushed and the screw 4 does not fall off.

上記の実施の形態において、引張バネ５の固定用巻き部５１は、平面視矩形に線材を巻いたものであった。この他、図９（Ａ）〜（Ｃ）へ示す通り、引張バネ５の固定用巻き部５１を他の巻き部と同様、平面視円形に線材を巻いて形成するものとしても実施可能である。図９（Ａ）はその引張バネ５の平面図であり、図９（Ｂ）は当該引張バネ５へネジ４を装着した状態を示す平面図であり、図９（Ｃ）は図９（Ｂ）の正面図である。
この場合、第２支持部ａ２は、図６（Ｂ）へ示すように、直線的に左右へ伸びる溝ａ２１，ａ２１を、備えるものとしてもよいが、当該溝ａ２１，ａ２１を、上記固定用巻き部５１の平面視円形の形状に合わせて、円弧状に左右に伸びるものとすれば、より確実に、固定用巻き部５１をハウジング２へ取り付けることができる（図示しない）。 In the above embodiment, the fixing winding 51 of the tension spring 5 is a wire wound around a rectangular shape in plan view. In addition, as shown in FIGS. 9A to 9C, the fixing winding 51 of the tension spring 5 can be formed by winding a wire in a circular shape in plan view like the other windings. . 9A is a plan view of the tension spring 5, FIG. 9B is a plan view showing a state where the screw 4 is attached to the tension spring 5, and FIG. 9C is a plan view of FIG. Is a front view.
In this case, as shown in FIG. 6B, the second support part a2 may be provided with grooves a21 and a21 that extend linearly to the left and right. However, the grooves a21 and a21 are provided on the fixing winding. The fixing winding portion 51 can be more reliably attached to the housing 2 (not shown) if it extends left and right in an arc shape in accordance with the circular shape of the portion 51 in plan view.

また、引張バネ５の保持用巻き部５３について、上記の各実施の形態では、平面視円形に線材を巻いたものを示した。この他、当該保持用巻き部５３について、上記円形以外の形状を採るものとしても実施可能である。
例えば、図１０へ示すように、上記保持用巻き部５３は、ネジ４の座面の径よりも大きな径と、ネジ４の座面の径よりも小さな径とを備え、保持用巻き部５３の上記何れの径の部分も、ネジ４の軸部４０を通すことが可能なものを採用することができる（ここで、上記の保持用巻き部５３の径とは、保持用巻き部５３の中心を通る直線（仮想線）の長さをいう）。
即ち、図１０（Ａ）〜（Ｃ）へ示す通り、上記のネジ４の座面４２の輪郭は、図示の通り、円形であり、上記の引張バネ５を形成する線材は、少なくとも保持用巻き部５３において、多角形状に巻かれた状態に形成することができる。上記の保持用巻き部５３は、上記線材の弾性を利用して押し広げることによってネジ４の頭部４１側から当該頭部４１を超えて座面側に配置することができ、上記ネジ４の座面より小さな径の部分が、座面と当接して、保持用巻き部５３からネジ４が脱落するのを防止するものである。尚、上記の多角形とは、その角が完全に尖ったものに限定するものではなく、角が丸くなっていても、全体の輪郭が円と区別できるものであれば、これを含む。ここでは、保持用巻き部５３が呈する上記の多角形は、長方形である。但し、このような長方形に限定するものではなく、例えば正方形状に巻かれたものとしても実施可能である。正方形とした場合、当該正方形の向かい合う頂点間（対角線）の幅が、ネジ４の頭部４１の座面４２の直径より大きく、向かい合う辺間の幅（辺の長さ）が、ネジ４の頭部４１の座面４２の直径よりも小さいものとすればよい。 Moreover, about each holding | maintenance winding part 53 of the tension spring 5, in each said embodiment, what wound the wire in the planar view circle was shown. In addition, the holding winding portion 53 can be implemented by adopting a shape other than the circular shape.
For example, as shown in FIG. 10, the holding winding portion 53 has a diameter larger than the diameter of the seat surface of the screw 4 and a diameter smaller than the diameter of the seat surface of the screw 4, and the holding winding portion 53. As for any of the above-mentioned diameters, it is possible to adopt a portion that allows the shaft portion 40 of the screw 4 to pass therethrough (here, the diameter of the holding winding portion 53 is the same as that of the holding winding portion 53). The length of a straight line (virtual line) passing through the center).
That is, as shown in FIGS. 10A to 10C, the outline of the seating surface 42 of the screw 4 is circular as shown in the figure, and the wire forming the tension spring 5 is at least a holding winding. In the part 53, it can form in the state wound by the polygonal shape. The holding winding portion 53 can be arranged on the seat surface side from the head 41 side of the screw 4 beyond the head 41 side by pushing and spreading using the elasticity of the wire. A portion having a smaller diameter than the seating surface is in contact with the seating surface to prevent the screw 4 from falling off the holding winding portion 53. The polygon is not limited to the one whose corner is perfectly pointed, and includes any polygon whose outline can be distinguished from a circle even when the corner is round. Here, the polygon presented by the holding winding portion 53 is a rectangle. However, the present invention is not limited to such a rectangle, and for example, it can be implemented as being wound in a square shape. In the case of a square, the width between the opposite vertices (diagonal lines) of the square is larger than the diameter of the seating surface 42 of the head 41 of the screw 4, and the width between the opposite sides (side length) is the head of the screw 4. What is necessary is just to make it smaller than the diameter of the seating surface 42 of the part 41. FIG.

詳述すると、保持用巻き部５３は、図１０（Ａ）〜（Ｃ）へ示す通り、引張バネ５において、平面視矩形に巻かれた区間として形成して実施することが可能である。この場合、保持用巻き部５３は、４つの直線部分（長辺５３ａ，５３ａ、短辺５３ｂ，５３ｂ）を備える。保持用巻き部５３は、上記のネジ４の座面４２（頭部４１）の径よりも大きな径と、ネジ４の座面４２（頭部４１）の径よりも小さな径とを備える。ここで、保持用巻き部５３について、ネジ４の座面４２に対する径の大小というのは、２巻きの夫々について、ネジ４の座面４２の径より、大きな径の部分（大径部）と、小さな径の部分（小径部）とが設けられているということである（一方の巻きの径が上記座面４２の径より大きく、他方の巻きの径が上記座面４２の径より小さいということではない）。
この実施の形態において、図１０（Ｂ）へ示す通り、引張バネ５を形成する線材は、上記の保持用巻き部５３にて、平面視長方形を呈するように巻かれている。即ち、保持用巻き部５３の上記各巻き（２巻き）の夫々について、平面視同一の向きに配置された長方形を呈する。
図１０（Ｃ）は、ネジ４の各部と上記保持用巻き部５３との大きさを対比する説明図である。この図１０（Ｃ）へ示す通り、上記の長方形の長辺５３ａ，５３ａ間の間隔（短辺５３ｂの長さ）は、ネジ４の上記座面４２の直径よりも小さく、ネジ４の軸部４０の直径よりも大きいかこれと等しい。この長方形の短辺５３ｂ，５３ｂ間の間隔（長辺５３ａの長さ）は、ネジ４の上記座面４２の直径よりも大きい。即ち、この実施の形態において、長辺５３ａ，５３ａが上記の小径部を構成し、短辺５３ｂ，５３ｂが上記の大径部を構成する。
また、保持用巻き部５３の上下の幅は、ネジ４の座面４２と副座面４３との間の幅と同じかそれよりも小さい。
製造時において、図４へ示すネジ４の座面４２の下に、上記図１０へ示す引張バネ５の保持用巻き部５３が位置するよう、引張バネ５へネジ４を装着する。この装着に際して、ネジ４の頭部４１側より、引張バネ５の下部の上記保持用巻き部５３の長辺５３ａを、当該頭部４１の座面４２に引っ掛けて、保持用巻き部５３の他の部分を上方よりこの頭部４１へ押し付けることにより、長辺５３ａ，５３ａ間の幅を押し広げて、ネジ４の頭部４２を乗り越えさせ、保持用巻き部５３全体をネジ４の座面４２側へ移行させることができる。このように頭部４１を乗り越えた後バネ４の弾性によって、保持用巻き部５３は、元の状態に戻り、ネジ４の座面４２に対して、上記長辺５３ａ，５３ａが対応する。 More specifically, as shown in FIGS. 10A to 10C, the holding winding portion 53 can be formed and implemented as a section wound in a rectangular shape in plan view in the tension spring 5. In this case, the holding winding portion 53 includes four straight portions (long sides 53a and 53a, short sides 53b and 53b). The holding winding portion 53 has a diameter larger than the diameter of the seating surface 42 (head 41) of the screw 4 and a diameter smaller than the diameter of the seating surface 42 (head 41) of the screw 4. Here, with respect to the holding winding portion 53, the size of the diameter of the screw 4 with respect to the seating surface 42 is a portion having a larger diameter (large diameter portion) than the diameter of the seating surface 42 of the screw 4 for each of the two turns. This means that a small-diameter portion (small-diameter portion) is provided (the diameter of one winding is larger than the diameter of the seat surface 42 and the diameter of the other winding is smaller than the diameter of the seat surface 42). Not that).
In this embodiment, as shown in FIG. 10B, the wire forming the tension spring 5 is wound around the holding winding portion 53 so as to exhibit a rectangular shape in plan view. That is, each of the above-described windings (two windings) of the holding winding portion 53 has a rectangular shape arranged in the same direction in plan view.
FIG. 10C is an explanatory diagram comparing the size of each part of the screw 4 and the holding winding part 53. As shown in FIG. 10C, the distance between the long sides 53 a and 53 a of the rectangle (the length of the short side 53 b) is smaller than the diameter of the seat surface 42 of the screw 4, and the shaft portion of the screw 4. Greater than or equal to 40 diameters. The interval between the rectangular short sides 53 b and 53 b (the length of the long side 53 a) is larger than the diameter of the seating surface 42 of the screw 4. That is, in this embodiment, the long sides 53a and 53a constitute the small diameter portion, and the short sides 53b and 53b constitute the large diameter portion.
In addition, the vertical width of the holding winding portion 53 is the same as or smaller than the width between the seat surface 42 and the sub seat surface 43 of the screw 4.
At the time of manufacture, the screw 4 is attached to the tension spring 5 so that the holding winding portion 53 of the tension spring 5 shown in FIG. 10 is positioned under the seating surface 42 of the screw 4 shown in FIG. At the time of mounting, the long side 53 a of the holding winding portion 53 below the tension spring 5 is hooked on the seating surface 42 of the head 41 from the head 41 side of the screw 4, and the other of the holding winding portion 53. Is pressed against the head 41 from above to widen the width between the long sides 53a and 53a so as to get over the head 42 of the screw 4 and the entire holding winding 53 is seated on the seat 42 of the screw 4. Can be moved to the side. Thus, the holding winding portion 53 returns to the original state by the elasticity of the rear spring 4 after getting over the head 41, and the long sides 53 a and 53 a correspond to the seating surface 42 of the screw 4.

この他、保持用巻き部５３は、このような四角形に限定するものではなく、他の多角形状に巻かれたものとしても実施可能である。また、固定用巻き部５１と保持用巻き部５３の巻きの形状については、上記の多角形に限定するものではなく、例えば長円（円弧部分と直線部分とを備えた円）や、その他の直線部分と曲線部分とが複合されたものであっても実施可能である。
このような他の実施の形態について、図１１を用いて説明する。図１１（Ａ）はこの実施の形態の引張バネ５を示す略底面図であり、図１１（Ｂ）は、当該引張バネ５にネジ４を装着した状態を示す略平面図であり、図１１（Ｃ）は図１１（Ｂ）の略側面図である。
図１１（Ａ）〜（Ｃ）に示す通り、保持用巻き部５３について、線材を長円状に巻いて形成することも可能である（この図１１に示す実施の形態では、固定用巻き部５１については平面視円弧状に巻かれている）。
この場合、当該長円の長軸の長さを、ネジ４の頭部４１の座面４２の直径よりも大きいものとし、当該長円の短軸の長さを、ネジ４の頭部４１の座面４２の直径よりも小さなものとすればよい。
上記の図９〜図１１に示す各実施の形態においても、明示した以外の構成については、上記図１〜図８へ示す実施の形態と同様である。 In addition, the holding winding portion 53 is not limited to such a quadrangle, and can be implemented as being wound in another polygonal shape. Further, the winding shape of the fixing winding portion 51 and the holding winding portion 53 is not limited to the above polygonal shape. For example, an ellipse (a circle having an arc portion and a straight portion), other Even if the straight line part and the curved line part are combined, the present invention can be implemented.
Such another embodiment will be described with reference to FIG. FIG. 11A is a schematic bottom view showing the tension spring 5 of this embodiment, and FIG. 11B is a schematic plan view showing a state in which the screw 4 is attached to the tension spring 5. FIG. 11C is a schematic side view of FIG.
As shown in FIGS. 11A to 11C, the holding winding portion 53 can be formed by winding a wire rod in an oval shape (in the embodiment shown in FIG. 11, the fixing winding portion). 51 is wound in a circular arc shape in plan view).
In this case, the length of the major axis of the ellipse is larger than the diameter of the seating surface 42 of the head 41 of the screw 4, and the length of the minor axis of the ellipse is set to the length of the head 41 of the screw 4. The diameter may be smaller than the diameter of the seating surface 42.
Also in each of the embodiments shown in FIGS. 9 to 11, the configurations other than those specified are the same as those in the embodiments shown in FIGS.

（Ａ）は本願発明に係るトランスの全体正面図であり、（Ｂ）はこのトランスの全体側面図であり、（Ｃ）はこのトランスの全体平面図である。(A) is the whole front view of the transformer based on this invention, (B) is the whole side view of this transformer, (C) is the whole top view of this transformer. （Ａ）及び（Ｂ）は、上記トランスに用いられる端子台のケーシングの要部斜視図である。(A) And (B) is a principal part perspective view of the casing of the terminal block used for the said transformer. （Ａ）は上記端子台のケーシングの上記と他の部位を示す要部側面図であり、（Ｂ）その底面図であり、（Ｃ）はその平面図であり、（Ｄ）はその背面図であり、（Ｅ）はその正面図である。(A) is the principal part side view which shows the said and other site | parts of the casing of the said terminal block, (B) It is the bottom view, (C) is the top view, (D) is the back view. (E) is a front view thereof. （Ａ）は上記の端子台に用いられるネジの（押圧部材を省いた状態を示す）正面図であり、（Ｂ）は当該ネジに押圧部材が装着された状態を示す正面図である。(A) is a front view (showing the state where a pressing member is omitted) of a screw used in the terminal block, and (B) is a front view showing a state where the pressing member is attached to the screw. （Ａ）は上記端子台に用いられる引張バネの斜視図であり、（Ｂ）はその平面図であり、（Ｃ）はネジを装着した状態を示す引張バネの側面図である。(A) is a perspective view of a tension spring used in the terminal block, (B) is a plan view thereof, and (C) is a side view of the tension spring showing a state where a screw is attached. （Ａ）は図５に示す引張バネを図４（Ｂ）へ示すネジへ装着した状態を示す斜視図であり、（Ｂ）は（Ａ）に示す引張バネを図２（Ａ）へ示すケーシングの要部へ装着した状態を示す斜視図である。(A) is a perspective view showing a state where the tension spring shown in FIG. 5 is attached to the screw shown in FIG. 4 (B), and (B) is a casing shown in FIG. 2 (A). It is a perspective view which shows the state with which the principal part was mounted | worn. 図６（Ａ）へ示す引張バネを装着した状態を示す端子台の縦断面図である。It is a longitudinal cross-sectional view of the terminal block which shows the state which mounted | wore the tension | pulling spring shown to FIG. 6 (A). 図７へ示す端子台の使用状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the use condition of the terminal block shown in FIG. （Ａ）は上記引張バネの他の実施の形態を示す略平面図であり、（Ｂ）は（Ａ）のバネにネジを装着した状態を示す略平面図であり、（Ｃ）は（Ｂ）の略側面図である。(A) is a schematic plan view showing another embodiment of the tension spring, (B) is a schematic plan view showing a state in which a screw is attached to the spring of (A), and (C) is (B ) Is a schematic side view. （Ａ）は上記引張バネの他の実施の形態を示す斜視図であり、（Ｂ）は（Ａ）の略平面図であり、（Ｃ）はネジの頭部と引張バネの保持用巻き部との位置関係を示す説明図である。(A) is a perspective view showing another embodiment of the tension spring, (B) is a schematic plan view of (A), (C) is a screw head and a winding portion for holding the tension spring. It is explanatory drawing which shows the positional relationship with these. （Ａ）は上記引張バネの他の実施の形態を示す略底面図であり、（Ｂ）は（Ａ）の引張バネにネジを装着した状態を示す略平面図であり、（Ｃ）は（Ｂ）の略側面図である。(A) is a schematic bottom view showing another embodiment of the tension spring, (B) is a schematic plan view showing a state where a screw is attached to the tension spring of (A), and (C) is ( It is a schematic side view of B).

Explanation of symbols

１端子台
２ケーシング
３電気導通板
４ネジ
５引張バネ
４０（ネジの）軸部
４１（ネジの）頭部
５１（引張バネの）固定用巻き部
５２（引張バネの）伸縮巻き部
５３（引張バネの）保持用巻き部 DESCRIPTION OF SYMBOLS 1 Terminal block 2 Casing 3 Electrical conduction plate 4 Screw 5 Tension spring 40 (Screw) shaft part 41 (Screw) head 51 (Tension spring) Fixing winding part 52 (Tension spring) Expansion winding part 53 (Tension Winding part for holding the spring

Claims

Screw having a casing having a wire insertion opening on the front surface and an operation opening on the upper surface, an electric conduction plate provided in the casing, and a head portion capable of fitting the shaft portion and the tightening tool. And a tension spring formed by winding the wire, and the head forms the seat surface or the seat surface by attaching a washer with respect to the screw. The conductive plate is provided with a screw hole penetrating vertically, and the tension spring suspends a screw above the electrical conductive plate in the casing, and is above the electrical conductive plate from the line insertion opening. Insert the end of the electrical connection line, insert the tip of the tightening tool into the casing through the opening for operation, push down the screw, and screw the screw into the screw hole of the electrical conduction plate to electrically connect the electrical connection line. On the terminal block that can be connected to the conductive plate ,
The screw is provided with a pressing member that is attached to the shaft portion of the screw and sandwiches the electric connection line together with the electric conduction plate,
One end of the tension spring is hooked on the seat surface of the screw, so that the tension spring suspends the screw,
A terminal block, wherein the screw is provided with a sub-seat surface that restricts the pressing member from approaching the seat surface, separately from the seat surface.

With the axial direction of the screw as the top and bottom, the head of the screw is provided at the upper end of the shaft,
The head portion of the screw has a larger diameter than the shaft portion of the screw, and the seat surface of the screw is a stepped surface due to a difference in diameter between the head portion and the shaft portion,
The shaft portion of the screw includes a large-diameter portion and a small-diameter portion that is located on the lower end side of the large-diameter portion and has a smaller diameter than the large-diameter portion, and the sub-seat surface includes the large-diameter portion and the small-diameter portion. It is a step surface due to the difference in diameter,
The pressing member includes a mounting hole that vertically penetrates the pressing member and through which a small-diameter portion of the shaft portion of the screw passes.
The terminal block according to claim 1, wherein an inner diameter of the through hole is smaller than a diameter of the large-diameter portion of the shaft portion of the screw.

The tension spring includes a fixing winding portion that fixes the tension spring in the casing, a holding winding portion that contacts the seat surface of the screw and holds the screw, and between the fixing winding portion and the holding winding portion. With a stretchable winding part interposed between,
The terminal block according to claim 1, wherein the holding winding portion is hooked on a seating surface of the screw and suspends the screw above the electric conduction plate in the casing.

A transformer comprising the terminal block according to claim 1.