JP2006210199A - Terminal board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce cost and cope with increase and decrease of the number of connections to the same potential, while the appearance is superior without the necessity of separately preparing the exclusive wiring and without wiring work at the same potential. <P>SOLUTION: The conductive terminal 2 to use for wiring transit connection is formed into a T-shape as viewed in a plane, protruding part 22 for coupling of that conductive terminal 2 into a square hole 32 of the adjacent unit 3, and this inserted protruding part 22 for coupling and the center part of the conductive terminal 2 that is fitted into that unit 3 are directly tightened vertically with a screw. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention is, for example, used for distribution relay and wiring branching in switchboards such as nuclear power plants, thermal power plants and substations, control panels and monitoring panels, for example, screw type terminal blocks, screw up type terminal blocks, spring type terminals The present invention relates to a terminal block such as a table and a clamp type terminal block.

  Conventionally, various terminal blocks such as screw type terminal blocks, screw-up type terminal blocks, spring type terminal blocks and clamp type terminal blocks have been used for distribution relays and branching in switchboards, control panels and monitoring panels. .

  FIG. 6 is a perspective view showing a configuration example of a conventional screw-up type terminal block in which a plurality of units are connected in the width direction.

  As shown in FIG. 6, the screw-up type terminal block 100 is a state in which the screw 101 is rotated and detached from the screw hole 102 a of the conductive terminal 102 when the screw 101 is fastened and the wiring is connected via the conductive terminal 102. Thus, by moving (up) the screw 101 together with the washer 103 in a direction perpendicular to the terminal surface (upward), the number of terminals can be changed to facilitate the screw fastening operation. In this screw-up type terminal block 100, a conductive terminal 102 is accommodated for each unit having an insulating wall 104, a plurality of units are incorporated in a rail 105, and a fixing metal fitting is attached from both sides of the plurality of units via end plates 106. It is fixed on the rail 105 by 107.

  Details of such a configuration example of the screw-up type terminal block 100 are described in Patent Document 1, for example.

Further, in the control panel standard of IEC standard 60247, it is obliged to take protective grounding for each device. This means that SG (surge ground) of each device is connected together on the bus bar separately from the normal grounding.
Japanese Utility Model Publication No. 5-23426

  However, the conventional screw-up type terminal block 100 is a unit type in which the number of terminals can be changed, and the adjacent conductive terminals 102 are partitioned by a molded insulating wall 104 and electrically insulated from each other. In order to electrically connect a plurality of conductive terminals 102 adjacent to each other, each terminal is connected by using dedicated wiring components such as a short bar and wiring individually. In this case, it is necessary to prepare a dedicated wiring component and wiring separately, and the wiring work is complicated and complicated, and there is a possibility that wiring may be forgotten or a wiring error may occur.

  Further, in the conventional ground terminal, all the taps are opened on the bus bar, and all of the taps are connected to the bus bar using the dedicated ground wiring from each device. As a result, a dedicated bus bar that has been tapped in large numbers is required, and the number of devices is not fixed, and the number of tappings increases at the time of wiring. The number of busbars itself needs to be large, and it may be necessary to remove or attach wires. This increases man-hours and costs, and the appearance is poor. There is no.

  The present invention solves the above-described conventional problems, and it is not necessary to prepare a dedicated wiring separately, there is no wiring work for making the same potential, the appearance is good, the cost can be reduced, and the same It is an object of the present invention to provide a terminal block that can easily cope with an increase or decrease in the number of connections to a potential.

  The terminal block of the present invention is a unit-type terminal block that allows a plurality of insulating units accommodating conductive terminals for wiring relay and wiring branching to be connected in the width direction, and both conductive terminals of adjacent units are electrically connected. Connected directly or via spacer means, whereby the above object is achieved.

  In addition, when the conductive terminal in the terminal block of the present invention has a T-shape in plan view in which the connection terminal protrudes from the center of the strip-shaped terminal, the connection at one of the conductive terminals of the adjacent units is connected. At least the edge portion of the terminal for use and the central portion of the other conductive terminal are provided so as to overlap each other.

  Further, when the conductive terminal in the terminal block of the present invention is L-shaped in plan view, at least the edge portion of one of the conductive terminals of the adjacent units and the bent center of the other conductive terminal It overlaps with the part.

  Furthermore, the edge part and the said center part in the terminal block of this invention are electrically connected by either the fastening force of a screw, the urging | biasing force of a spring, and pressing force.

  With the above configuration, the operation of the present invention will be described below.

  In the present invention, both conductive terminals of adjacent units are electrically connected directly. As a result, it is not necessary to prepare a dedicated wiring separately as in the prior art, and there is no separate wiring work for setting the same potential, and the appearance can be improved and the cost can be reduced. Further, since it is a unit type, the number of units can be easily increased / decreased as necessary, so that it is possible to easily cope with an increase / decrease in the number of connections to the same potential such as the ground potential.

  As described above, according to the present invention, since both conductive terminals of adjacent units are electrically connected directly, it is not necessary to prepare a dedicated wiring separately, there is no wiring work at the same potential, and appearance The cost can be reduced and the number of connections to the same potential can be easily increased or decreased.

  Hereinafter, a case where the embodiment of the terminal block of the present invention is applied to a screw-up type terminal block will be described in detail with reference to the drawings. The terminal block of the present invention is not limited to the application to the screw-up type terminal block, and is widely used for wiring relay / branching devices such as a spring type terminal block and a clamp type terminal block in addition to a normal screw type terminal block. It can be applied. Of course, one end of the conductive terminal may be a screw-type terminal and the other end may be a faston tab, a spring-type terminal, a clamp-type terminal, or the like, or a combination thereof.

  FIG. 1 is a diagram showing a unit configuration example of a screw-up type terminal block according to an embodiment of the present invention, where (a) is a plan view thereof, (b) is a front view thereof, and (c) is a side view thereof. FIG.

  1 (a) to 1 (c), the screw-up type terminal block 10 of the present embodiment has a screw 1 with a washer and screw holes 21 for fastening at both end portions of a strip-shaped metal plate. A unit 3 comprising a conductive terminal 2 and an insulating member such as a resin mold that holds the conductive terminal 2 and guides the washer-attached screw 1 in a direction perpendicular to the surface of the conductive terminal 2 so as to be movable (up and down). And a compression spring 4 that applies an urging force to the screw with washer 1 in a direction away from the screw hole 21 with respect to the screw with washer 1 (a direction perpendicular to the terminal surface).

  The screw 1 with a washer is held in a free ring state in the hole of the washer 12 by caulking the washer 12 after passing the screw 11 from the tip portion into the screw retaining hole of the washer 12. ing. The washer 12 includes a square washer portion 121 having a screw holding hole and a support portion 122 that is connected to one side portion of the washer portion in an L shape in a side view. The support portion 122 is arranged in a direction perpendicular to the surface of the strip-shaped terminal 2, and the compression spring 4 is attached to the front end portion 122 a.

  The conductive terminal 2 has a connecting protrusion 22 that protrudes from the side surface of the central portion of a strip-shaped (I-shaped) metal plate, and is formed in a T shape in plan view. The connecting protrusion 22 is bent so as to protrude from the lower side of the side by the thickness of the strip-shaped (I-shaped) metal plate. A screw hole 23 is formed in the central portion in the width direction at the tip edge portion of the connecting projection 22. Further, at the center position between both screw holes 21 formed at both end edges of the strip-shaped (I-shaped) metal plate, a burr hole 24 slightly larger than the outer diameter of the tip end portion of the screw 11 is formed. . The hole 24 is provided at the base of the connecting protrusion 22, and its center is located immediately below the connecting protrusion 22 of the conductive terminal 2 accommodated in the adjacent unit 3. It is formed at a position that coincides with the center of the screw hole 23. Notches 25 are provided on the side surface of the conductive terminal 2 opposite to the connecting protrusion 22 side at equal distances from the hole 24 and support portions for the washer 12 are provided in these notches 25. 122 is fitted and positioned so as to be movable in a direction perpendicular to the surface of the conductive terminal 2. Since the screw holes 21 and 23 have a screw thread engagement with respect to the size of the screw 11, burring is performed when the conductive terminal 2 is thin.

  A plurality of units 3 can be connected in the thickness direction, and each unit 3 can accommodate a screw 1 with a washer, a conductive terminal 2 and a compression spring 4. The unit 3 is provided with a side wall 31, and when the unit 3 is viewed from the front by the ribs erected from the side wall 31, the position is regulated vertically and horizontally between the ribs. In the state where the conductive terminal 2 is inserted and held, the units 3 adjacent in the front and rear directions are fitted and connected. The conductive terminal 2 is disposed between the side walls 31 of both adjacent units 3 and is regulated in position in the front-rear direction by the side walls 31. The side wall 31 is formed with a square hole 32 for penetrating the connecting protrusion 22 into the adjacent unit 3. When the conductive terminal 2 is accommodated in the unit 3, the connecting protrusion 22 protrudes on the front side, and when connecting the unit 3 next to the unit 3, the connecting protrusion 22 penetrates the square hole 32 of the side wall 31. In addition, the conductive terminals 2 can be accommodated in the unit 3 so that the connecting protrusion 22 is positioned on the lower side. Further, in the recess surrounded by the side wall 31 and each rib of the unit 3, the position of the washer 121 is restricted when the washer-attached screw 1 is urged in the direction away from the screw hole 21 by the compression spring 4. A rib 33 is provided that can hold this.

  The compression spring 4 is disposed at a position below the conductive terminal 2 in the unit 3 and is supported so as to urge the bulging portion in the middle of the support portion 122 of the washer 12 upward (in the direction away from the screw hole 21). It arrange | positions between the front-end | tip part of the part 122, and the bottom face in the recessed part of the unit 3 and a rib.

  With the above configuration, when assembling the screw-up type terminal block 10 of the present embodiment, first, the conductive terminals 2 in a state where the support portions 122 of the washers 12 are respectively inserted into the notch portions 25 from one direction in the front-rear direction. The unit 3 is inserted between the ribs of the unit 3 so that the connecting protrusion 22 protrudes toward the front side, and another unit 3 is inserted into the square hole 32 of the side wall 31 and the connecting protrusion 22 is passed through. The units 3 are connected to each other.

  Next, the conductive terminal 2 in a state where the support portions 122 of the washer 12 are respectively inserted into the notches 25 is fitted between the ribs of the connected units 3 from the front and rear directions. At this time, the connecting protruding portion 22 protruding from the square hole 32 of the side wall 31 is disposed so as to overlap directly below the central portion of the inserted conductive terminal 2. At this time, the center of the hole 24 of the inserted conductive terminal 2 is positioned so as to coincide with the center of the screw hole 23 of the connecting protrusion 22 protruding from the square hole 32 of the side wall 31. This is repeated as many times as necessary, and each time it is inserted into the rail 5 described later.

  Further, as shown in FIGS. 3A to 3C, end plates 6 are respectively inserted into the rails 5 from both sides in the connecting direction of the plurality of units 3 inserted into the rails 5, The end plate 6 is fixed to the rail 5 by each fixing bracket 7.

  Finally, the screw 11 is repeatedly fastened from the burr hole 24 of the conductive terminal 2 to the screw hole 23 of the connecting protrusion 22 by a number one less than the number of connected units 3. Assembling of the screw-up type terminal block 10 of the present embodiment in which all of the plurality of adjacent conductive terminals 2 are electrically connected is completed by attaching the transparent cover 8 to the surface portion of the unit 3 connected to the plurality. .

  The screw-up type terminal block 10 of the present embodiment is attached to, for example, the optimal position of the control panel, and the wiring terminals (crimp terminals A attached to the leading ends of the wirings) from each device are connected to the leading ends of the screws 1 with washers. After being inserted into the gap between the conductive terminal 2 and the screw hole 21, the tip of the screw 11 is tightened into the hole of the crimp terminal A and the crimp terminal A is sandwiched between the conductive terminal 2 and the washer 12 of the screw with washer 1. The conductive terminal 2 and the electric wire from each device are connected. Furthermore, the control panel of the screw-up type terminal block 10 can be obtained by attaching the wiring attached to one terminal of the screw-up type terminal block 10 (crimp terminal B attached to the tip of the wiring) to the common electrode terminal or the ground terminal. The common equipotential wiring to is completed.

  Here, at the time of regular maintenance, first, when the screw 1 with the washer is loosened, the tip of the screw 1 with the washer is detached from the screw hole 21 of the conductive terminal 2, and the screw with the washer is pressed by the urging force of the compression spring 4. The screw 11 moves (up) in the direction perpendicular to the terminal surface together with the one washer 12.

  Next, after inserting the crimp terminal A or B to which the electric wire is crimped into the gap between the tip of the screw 1 with the washer and the screw hole 21 of the conductive terminal 2, the screw 11 is inserted into the hole of the crimp terminal A or B. By tightening through the tip and sandwiching the crimp terminal A or B between the conductive terminal 2 and the washer 12 of the screw with washer 1, the conductive terminal 2 and the same potential electric wire can be connected again.

  As described above, according to the screw-up type terminal block 10 of the present embodiment, the conductive terminal 2 used for wiring relay connection is formed in a T shape in plan view, and the conductive terminal is placed in the square hole 32 of the adjacent unit 3. 2 is inserted, and the inserted connecting protrusion 22 and the central portion of the conductive terminal 2 fitted in the unit 3 are fastened up and down with screws, so that an electrical terminal coupling is achieved. Since the number can be changed, there is no need to prepare dedicated wiring separately as in the past, and there is no need for additional wiring work to make the same potential (for example, ground potential). And can easily cope with an increase or decrease in the number of connections to the same potential. Therefore, the screw-up type terminal block 10 of the present embodiment is a terminal block that is easy when all the conductive terminals 2 have the same polarity (same potential) without using external accessory parts (for example, when grounded), that is, If each terminal 2 is electrically connected to each other and is connected to each other by a crimp terminal A or B to be branched, etc. The screw-up type terminal block 10 works effectively.

  In this embodiment, the screw-up type terminal block 10 has been described. However, as described above, the connection structure of the present invention is, for example, a spring type terminal block or a clamp type terminal block in addition to a normal screw type terminal block. Even applicable. In the clamp type terminal block, as shown in FIG. 4, by rotating the lever 91, the projection 91 a of the lever 91 is pressed against the one terminal 92 having a spring property, and the one terminal 92 (one of the ones is pressed by the pressing force). The one terminal 92 and the other terminal 93 can be electrically connected directly by moving the conductive terminal) toward the other terminal 93 (the other conductive terminal). In this case, however, the lever 91 can be connected as necessary. The one terminal 92 and the other terminal 93 can be electrically connected or disconnected by rotating. Such a clamp-type terminal block 90 is also called a disconnect terminal block. In the spring-type terminal block, the one terminal and the other terminal can be electrically and stably connected by the biasing force of the spring of one terminal or the biasing force of the spring against one terminal. By rotating, the protrusion of the lever is rotated, and the one terminal and the other terminal are separated from each other against the urging force of the spring of one terminal or the urging force of the spring against one terminal, and both are electrically cut off. can do. In this case, the one terminal and the other terminal are always electrically connected directly to each other with at least one spring property. Furthermore, there may be a spring-type terminal block in which one terminal and the other terminal are separated from each other with a screwdriver or a dedicated tool. Therefore, it can be configured such that both conductive terminals of adjacent units are electrically connected by either the biasing force of the spring or the pressing force in addition to the fastening force of the screw.

  Further, in the present embodiment, the case where the burr hole 24 is formed in the central portion of the conductive terminal 2 and the screw hole 23 is formed in the connecting protrusion 22 directly below the burr hole 24 has been described. However, conversely, even when a screw hole is formed in the central portion of the conductive terminal 2 and a fool hole is formed on the side of the connecting protrusion 22a immediately above the screw hole, both adjacent conductive terminals 2 , 2 can be directly electrically connected. Also, a fool hole is formed in the central portion of the conductive terminal 2, a flaw hole is also formed in the connecting protrusion 22 directly below or above the flaw hole, and a nut is disposed directly below both the fool holes. May be.

  Furthermore, in the present embodiment, the connecting protrusion 22 of the adjacent conductive terminal 2 and the central portion of the conductive terminal 2 are configured to overlap each other, but this is not limiting, and the connection of the adjacent conductive terminal 2 is not limited thereto. If a spacer (spacer means) having a predetermined thickness is interposed between the projecting portion 22 and the central portion of the conductive terminal 2 to electrically connect them, the square hole 32 of the unit 3 is connected to the conductive terminal. It can be configured to have a necessary insulation distance above or below from the arrangement position of 2. If it does in this way, a normal strip-shaped conductive terminal can also be used next. In this case, the necessary insulation distance between the normal strip-shaped conductive terminal and the conductive terminal 2 of the present embodiment, that is, whether there is a square hole 32 between adjacent units 3 or through the square hole 32. It is also possible to carry out relay wiring using a normal strip-shaped conductive terminal without the connecting protrusion 22 in a part of the terminal block of the present invention.

  Furthermore, in the present embodiment, the conductive terminal 2 is configured in a T shape in plan view, but the present invention is not limited thereto, and may be configured in an L shape in plan view as in the conductive terminal 95 in FIG. In the case of an L-shaped conductive terminal 95 in plan view, as a portion to be connected between adjacent conductive terminals 95, the L-shaped bent central portion and one end edge portion are connected by a screw fastening force or a spring biasing force. It can be constituted as follows. In this case, the unit 3 of the above embodiment can be used as a one-sided terminal block having a conductive terminal only on one side.

  As mentioned above, although this invention has been illustrated using preferable embodiment of this invention, this invention should not be limited and limited to this embodiment. It is understood that the scope of the present invention should be construed only by the claims. It is understood that those skilled in the art can implement an equivalent range based on the description of the present invention and the common general technical knowledge from the description of specific preferred embodiments of the present invention. Patents, patent applications, and documents cited herein should be incorporated by reference in their entirety, as if the contents themselves were specifically described herein. Understood.

  The present invention relates to, for example, a screw terminal block, a screw-up terminal block, and a clamp type as a wiring relay and branching device used in switchboards such as nuclear power plants, thermal power plants and substations, control panels and monitoring panels. In the field of terminal blocks such as terminal blocks, there is no need to prepare dedicated wiring separately, no wiring work at the same potential, good appearance and low cost, and the same potential (or ground potential) It can easily cope with increase / decrease in the number of connections.

It is a figure which shows the structural example of 1 unit of the screw-up-type terminal block which concerns on embodiment of this invention, Comprising: (a) is the top view, (b) is the front view, (c) is the side view. . It is a figure which shows the structural example of the conductive terminal of FIG. 1, Comprising: (a) is the top view, (b) is the front view, (c) is the perspective view. It is a figure which shows the example of an external appearance structure after completion of the assembly of the up-type terminal block of FIG. 1, (a) is the top view, (b) is the front view, (c) is the side view. It is a terminal connection block diagram which shows typically the example of a principal part structure at the time of applying this invention to a clamp type terminal block. It is a top view which shows the other structural example of the conductive terminal of FIG. It is a perspective view which shows the structural example of the conventional screw up type terminal block with which the multiple units were connected in the width direction.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Screw with washer 11 Screw 12 Washer 121 Washer part 122 Support part 122a Tip part 2,95 Conductive terminal 21 Screw hole 22 Connection protrusion 23 Screw hole 24 Float hole 3 Unit 31 Side wall 32 Square hole 4 Compression spring 5 Rail 6 End Plate 7 Fixing bracket 8 Cover 10 Screw-up type terminal block 90 Clamp type terminal block 91 Lever 91a Protruding part 92 One terminal 93 Other terminal

Claims (4)

In a unit-type terminal block that can connect a plurality of insulating units containing conductive terminals for wiring relay and wiring branching in the width direction,
A terminal block in which both conductive terminals of adjacent units are electrically connected directly or via spacer means.   When the conductive terminal has a T-shape in plan view in which the connecting terminal protrudes from the center of the strip-shaped terminal, at least the edge portion of the connecting terminal in one of the conductive terminals of the adjacent units. The terminal block according to claim 1, wherein the central portion of the other conductive terminal overlaps with each other.   When the conductive terminal is L-shaped in plan view, at least an edge portion of one of the conductive terminals of the adjacent units is provided to overlap with a bent central portion of the other conductive terminal. The terminal block according to claim 1.   The terminal block according to claim 2 or 3, wherein the end edge portion and the central portion are electrically connected by any one of a screw fastening force, a spring biasing force, and a pressing force.

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