JP2008193763A - Trip lock terminal board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable attaching/detaching a terminal with one action in working even if a distribution panel is not machined by easily attaching the terminal to an existing terminal board with terminal screws. <P>SOLUTION: A trip lock terminal board comprises a plug 1 having a conductor 3 formed thereon and a grip portion 4 consisting of an insulator formed on the other end; and a terminal board receiving tool 2 on which movable conductors 6 of first and second metal conductive plates 7, 8 are housed and fixed, the metal conductive plates 7, 8 in which a hook portion 9 for hooking terminal screws 52 are formed on one end and a movable conductor 6 contacting a conductor 3 of the plug 1 is formed on the other end. The trip lock terminal board is constituted so that first and second metal conductive plates 7, 8 of the terminal receiving tool 2 are connected to the two terminal screws 52 respectively, and the conductor 3 is in a conduction state or a non-conduction state with the first and second metal conductive plates 7, 8 by inserting and withdrawing the plug 1. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a trip lock terminal block which is provided in a trip circuit of a circuit breaker and is normally closed, and which opens the trip circuit at the time of abnormality or periodic inspection.

  Conventionally, a trip lock terminal block is provided on a switchboard. This trip lock terminal block is provided in a trip circuit for operating the circuit breaker, and is normally closed, and opens or locks the trip circuit at the time of abnormality or periodic inspection.

  For example, when trip lock is necessary for work or the like, the trip lock terminal block is disconnected to electrically lock it to prevent malfunction of the switch. As shown in FIG. 10, in the case of locking and unlocking, the conventional trip lock terminal block is formed by notching both ends of the metal conduction plate 53 to the terminal screws 52 of the upper and lower terminal blocks provided on the switchboard 51. Thus, the plug 55 serving as the latching portion 54 is latched. In this manner, the terminal screw 52 is turned to attach and remove the plug 55.

As a technology related to such a trip lock terminal block, for example, as in “trip lock terminal block” of Japanese Patent Application Laid-Open No. 2002-334742 of Patent Document 1, a plug having a metal conductive plate protruding from an insulating support, and an insulating block body It consists of a main body screwed with two terminal screws that connect the wires to each other. Insert the plug into the main body, make both terminal screws conductive with the metal conductive plate, and pull out the plug from the main body to make the terminal screws non-conductive. A trip lock terminal block is proposed in which a protrusion is projected all around the conducting plate receiving hole of the main body insulation block body, and a recess is formed in the center of the plug surface of the plug insulation support. Has been.
JP 2002-334742 A

  However, the attachment / detachment of the plug 55 requires time and effort because it is necessary to loosen or tighten the terminal screws 52 of the upper and lower terminal blocks many times. In particular, there is a problem that a large amount of labor is required when there are a large number of lock portions.

  Moreover, when performing trip lock using the apparatus by the "trip lock terminal block" of patent document 1, since it was necessary to process a switchboard, there existed a problem that it could not be used for the existing terminal block.

  The present invention has been developed to solve such problems. That is, an object of the present invention is to provide a trip lock terminal block that can be easily attached to an existing terminal block with a terminal screw so that the terminal can be attached and detached with one action without working on the switchboard. There is.

  According to the present invention, the trip-lock terminal block for connecting and disconnecting the two terminal screws (52) for connecting the wiring to the switchboard (51), wherein the insert is inclined so that the front end side is thinned. A plug (1) having a conductor (3) formed around it and a knob (4) made of an insulator formed at the other end, and a latching portion (9) hooked on the terminal screw (52) at one end And a first metal conductive plate (7) having a movable conductor (6) with which the conductor (3) of the plug (1) is in contact with the other end, and a latching portion (one with which the terminal screw (52) is hooked on one end. 9), a second metal conductive plate (8) having a movable conductor (6) in contact with the conductor (3) of the plug (1) at the other end, the first metal conductive plate (7) and the second metal conductive plate (7) A terminal block holder (2) in which both movable conductors (6) of the two-metal conductive plate (8) are housed and fixed, and the terminal block holder ( ) First and second metal conductive plates (7, 8) are connected to the two terminal screws (52), respectively, and the plug (1) is inserted and removed, whereby the conductor (3) is connected to the first metal. There is provided a trip lock terminal block characterized in that the conductive plate (7) and the second metal conductive plate (8) are configured to be conductive and non-conductive.

In order to prevent the plug (1) from being detached from the terminal block holder (2), it is preferable to provide a retaining structure (14) including a protruding portion (13) in the insulating portion of the plug (1).
For example, the retaining structure (14) supports the insulating plate formed with the fixing recess (15) on the plug insertion part (5) of the terminal block holder (2) by the elastic member (16), The protrusion (13) formed on the insulator of the plug (1) is detachably engaged with the fixing recess (15).
The retaining structure (14) opens a housing recess (17) in the insulator of the plug (1), and a coil spring (11) is inserted into the housing recess (17) together with a projecting portion (13). Is configured to be removably engaged with a fixing recess (15) formed in the plug insertion portion (5) of the terminal block holder (2).

In the state where the plug (1) is inserted into the terminal block holder (2), a protective cover (19) attached to the periphery with a magnet (18) attracted to the switchboard (51) so as to cover and fix them. ).
A voltage measuring conductor (12) can be provided around the plug insertion part (5) of the terminal block holder (2).

  The present invention also provides a trip-lock terminal block that connects and disconnects two terminal screws (52) that connect wiring to the switchboard (51), and includes an insert that is inclined so that the front end side is thin. A plug (1) having a conductor (3) formed around it and a knob (4) made of an insulator formed at the other end, and a latching portion (9) hooked on the terminal screw (52) at one end And a first metal conductive plate (7) having a movable conductor (6) with which the conductor (3) of the plug (1) is in contact with the other end, and a latching portion (one with which the terminal screw (52) is hooked on one end. 9), a second metal conductive plate (8) having a movable conductor (6) in contact with the conductor (3) of the plug (1) at the other end, the first metal conductive plate (7) and the second metal conductive plate (7) The movable conductor (6) of the two-metal conductive plate (8) is housed and fixed, and the existing terminal block is also covered on one side of the housing so as to cover it. A terminal block receiving cap (23) having an opening (21) and a window (22) opened on the other surface, the first and second metals of the terminal block receiving cap (23). The conductive plates (7, 8) are respectively connected to the two terminal screws (52), and the plug (1) is inserted / removed so that the conductor (3) is connected to the first metal conductive plate (7) and the second metal plate (7). The metal conductive plate (8) can be configured to be conductive or nonconductive.

  In the invention of the above configuration, the latching portion (9) of the first metal conducting plate (7) of the terminal block holder (2) and the latching portion (9) of the second metal conducting plate (8) are respectively provided. A terminal screw (52) of the terminal block is hooked, and the plug (1) is connected to the movable conductor (6) of the first and second metal conductive plates (7, 8) of the terminal block holder (2). By inserting from 3), the terminal can be attached and detached with one action. When making it non-conductive, this plug (1) is extracted from a terminal block holder (2). Thus, in the present invention, since the existing terminal block can be used, it is not necessary to process the distribution board (51) currently in operation.

  Since conduction and non-conduction are performed by inserting and removing the plug (1), among the operations performed before and after the operation, the operation time relating to trip lock can be shortened. Therefore, it is possible to quickly restore the work location, and it is possible to improve equipment and power system reliability and reduce the burden on the operator.

Since the plug (1) is provided with the retaining structure (14) including the projecting portion (13) so that the plug (1) is not detached from the terminal block holder (2), the switchboard (51) vibrates. Even so, the plug (1) can be prevented from inadvertently dropping.
The protective cover (19) that covers and fixes the terminal block holder (2) and the plug (1) can prevent dust from adhering. This protective cover (19) can be easily adsorbed to the switchboard (51) by a magnet (18) attached to the periphery thereof and removed.

  The present invention is a trip-lock terminal block that can be easily attached to an existing terminal block with terminal screws, and can be attached and detached with one action at the time of work without processing the switchboard.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing a trip lock terminal block according to the first embodiment. 2A and 2B show the trip lock terminal block of Example 1, wherein FIG. 2A is a front view of the plug, FIG. 2B is a front sectional view of the terminal block holder, FIG. 2C is a plan view of the plug, and FIG. ) Is a cross-sectional plan view of the terminal block holder. FIG. 3 is a perspective view of a state in which the plug of Example 1 is inserted into the terminal block holder. FIG. 4 is a front view of a state in which the plug of the first embodiment is inserted into the terminal block holder. FIG. 5 is an enlarged sectional view showing an example of a retaining structure.
The trip lock terminal block according to the first embodiment includes a plug 1 and a terminal block holder 2 into which the plug 1 is inserted. Each conductive plate of the terminal block holder 2 is screwed in advance to the terminal screw 52 of the existing terminal block. The plug 1 is composed of a conductor 3 for conducting and non-conducting and a knob 4 made of an insulator. The conductor 3 is formed by forming a conductive plate around the insert that is inclined so that the front end side is thin. This inclination angle is adjusted to the inclination angle of the movable conductor 6 in the plug insertion portion 5 described later. If the knob | pick part 4 consists of an insulator, it is not limited to a substantially rectangular parallelepiped shape like the example of illustration, It can be made into various shapes, such as a substantially cylindrical shape and a substantially cone shape. Further, it is desirable that the surface of the knob portion 4 is formed with a fine uneven surface having a non-slip function.

  As shown in FIG. 2, the terminal block holder 2 accommodates and fixes both the movable conductors 6 of the first metal conductive plate 7 and the second metal conductive plate 8. The first metal conducting plate 7 is formed with a latching portion 9 that is latched on one end of the terminal screw 52 and a movable conductor 6 that is in contact with the conductor 3 of the plug 1 at the other end. Similarly, the second metal conductive plate 8 is also formed with a latching portion 9 that is latched to the terminal screw 52 at one end and a movable conductor 6 that is in contact with the conductor 3 of the plug 1 at the other end. The expression of the first metal conductive plate 7 and the second metal conductive plate 8 is divided into the first and second for convenience of explanation. There is no difference in function and material in the metal conduction plate itself.

  As shown in FIGS. 1 and 2, the terminal block holder 2 is an insulator having a substantially cubic shape and having a substantially rectangular parallelepiped recess (plug insertion portion 5) on one surface thereof. The latching portion 9 of the first metal conducting plate 7 is fixed to the outside of the terminal block holder 2 so as to protrude, and the movable conductor 6 of the first metal conducting plate 7 is disposed in the plug insertion portion 5. The movable conductor 6 was configured to press the metal conductive plate 10 against the back surface thereof with a coil spring 11. As shown in FIG. 2B, the metal conductive plate 10 is formed in an inclined shape so that the conductor 3 of the plug 1 can be easily inserted and the conductor 3 can easily contact. The second metal conducting plate 8 is configured similarly to the first metal conducting plate 7. The first metal conductive plate 7 and the second metal conductive plate 8 are fastened to the existing terminal screw 52 and can be made conductive or non-conductive using the plug 1. The shape and structure of the latching portion 9 are not limited to those illustrated.

  A voltage measuring conductor 12 can be provided around the plug insertion portion 5 of the terminal block holder 2 (see FIGS. 1 and 3). For example, as shown in FIG. 8, the voltage measurement conductor 12 is provided in one terminal block holder 2 so as to be in contact with the first metal conductive plate 7 and the second metal conductive plate 8 inside the terminal block holder 2. A hole 28 is formed in the portion so that the voltage can be easily measured.

  As shown in FIG. 3, the first metal conductive plate 7 and the second metal conductive plate 8 are screwed and connected to two existing terminal screws 52, respectively. When the plug 1 is inserted into or pulled out of the plug insertion portion 5 of the terminal block holder 2 in this state, the conductor 3 of the plug 1 becomes the movable conductor 6 of the first metal conductive plate 7 and the second metal conductive plate. 8 is connected to the movable conductor 6. Therefore, the conductor 3 can be made conductive and nonconductive with the first metal conductive plate 7 and the second metal conductive plate 8 by inserting and pulling out the plug 1.

  As shown in FIGS. 2C and 2D, the trip lock terminal block of the present invention has a protruding portion 13 in the insulating portion of the plug 1 so that the plug 1 is not detached from the terminal block holder 2. A stop structure 14 is provided. For example, the retaining structure 14 supports an insulating plate formed with a fixing recess 15 on the plug insertion portion 5 of the terminal block holder 2 with an elastic member 16 such as a spring, and insulates the plug 1 in the fixing recess 15. The protrusion 13 formed on the body is configured to be detachably engaged. The retaining structure 14 has a function of preventing the plug 1 from being accidentally dropped when the switchboard 51 is vibrating.

  Alternatively, as shown in FIG. 5, the housing recess 17 is opened in the insulator of the plug 1, and the coil spring 11 is inserted into the housing recess 17 together with the protruding portion 13, and this is inserted into the plug insertion portion 5 of the terminal block holder 2. It can comprise so that it can engage with the recessed part 15 for fixation formed in removably.

FIG. 6 is a front view of a state in which the terminal block holder of Example 1 is fastened to the terminal screw. FIG. 7 is a front sectional view of the protective cover in a state where the protective cover covers the plug and the terminal block holder.
In a state where the plug 1 is inserted into the terminal block holder 2, a protective cover 19 can be further provided with a magnet 18 attached to the periphery of the switchboard 51 so as to cover and fix them. The protective cover 19 can be easily attracted to the switchboard 51 by the magnet 18 attached to the periphery thereof and can be removed. The protective cover 19 can prevent dust from adhering. The protective cover 19 is preferably made of a transparent material so that the inside can be observed.

  In this embodiment, first, the latching portion 9 of the first metal conducting plate 7 of the terminal block holder 2 and the latching portion 9 of the second metal conducting plate 8 are respectively fastened to the terminal screws 52 of the existing terminal block. . By inserting the plug 1 into the movable conductor 6 of the first and second metal conducting plates 7 and 8 of the terminal block holder 2, the terminal can be attached and detached with one action. The plug 1 is pulled out from the terminal block holder 2 when not conducting. Thus, in this embodiment, since the existing terminal block can be used, there is no need to process the switchboard 51 currently in operation.

  Since conduction and non-conduction can be performed by inserting and removing the plug 1, among the operations performed before and after the operation, the operation time relating to trip lock can be shortened. Therefore, it is possible to quickly restore the work location, and it is possible to improve the reliability of the equipment and power system and reduce the burden on the operator.

8A and 8B show a trip lock terminal block according to the second embodiment. FIG. 8A is a front view of a plug, and FIG. 8B is a front sectional view of a terminal block holder and a cap. FIG. 9 is a perspective view showing a trip lock terminal block according to the second embodiment.
The trip lock terminal block according to the second embodiment accommodates and fixes both the movable conductors 6 of the first metal conductive plate 7 and the second metal conductive plate 8 and opens an opening 21 on one surface of the casing so as to cover the existing terminal block. And a terminal block receiving cap 23 having a window portion 22 opened on the other surface. In the trip lock terminal block according to the second embodiment, since the terminal block receiving cap 23 is provided so as to cover the existing terminal block, dust does not adhere to the existing terminal block.

  The trip lock terminal block of the second embodiment has a structure in which the first metal conductive plate 7 and the second metal conductive plate 8 are configured to cover the existing terminal block, and the first metal conductive plate 7 and the second metal conductive plate of the first embodiment. Different from the shape of the plate 8. Other shapes of the plug 1 and the retaining structure 14 are the same as those in the first embodiment.

A driver insertion hole 24 is formed in the terminal block receiving cap 23 so that the first metal conductive plate 7 can be easily fastened to the terminal screw 52. Further, a driver insertion hole 25 is formed in a part of the first metal conductive plate 7. Similarly, driver insertion holes 24 and 25 are also formed on the second metal conductive plate 8 side. Therefore, the terminal block receiving cap 23 of the second embodiment can fasten the washer 26 and the nut 27 to the terminal screw 52 from the window 22 side.
A hole 28 for the voltage measuring conductor 12 is formed around the window 22 of the terminal block receiving cap 23.

  The trip lock terminal block of Example 2 is obtained by fastening the first and second metal conductive plates 7 and 8 of the terminal block receiving cap 23 to the two terminal screws 52 and inserting and removing the plug 1. The conductor 3 is electrically connected to or disconnected from the first metal conductive plate 7 and the second metal conductive plate 8.

  The present invention can be easily attached to an existing terminal block with the terminal screws 52, so that the terminal can be attached and detached at the time of work without processing the switchboard 51. Needless to say, the present invention is not limited to the embodiments, and various modifications can be made without departing from the scope of the present invention.

  The trip lock terminal block of the present invention can be used as a terminal block other than trip lock, for example, a reclosing input lock, a conveyance signal lock, and the like.

It is a perspective view which shows the trip lock terminal block of Example 1. FIG. The trip lock terminal block of Example 1 is shown, (a) is a front view of a plug, (b) is a front sectional view of a terminal block holder, (c) is a plan view of the plug, and (d) is a terminal. It is a plane sectional view of a base holder. It is a perspective view of the state which inserted the plug of Example 1 in the terminal block holder. It is a front view of the state which inserts the plug of Example 1 in a terminal block holder. It is an expanded sectional view showing an example of a retaining structure. It is a front view of the state which fastened the terminal block holder of Example 1 to the terminal screw. It is a front sectional view of the protective cover in a state where the protective cover covers the plug and the terminal block holder. The trip lock terminal block of Example 2 is shown, (a) is a front view of a plug, (b) is a front sectional view of a terminal block holder and a cap. It is a perspective view which shows the trip lock terminal block of Example 2. FIG. It is a perspective view which shows the conventional trip lock terminal block.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Plug 2 Terminal block holder 3 Conductor 4 Knob part 5 Plug insertion part 6 Movable conductor 7 1st metal conduction | electrical_connection board 8 2nd metal conduction | electrical_connection board 9 Latching part 10 Metal conduction | electrical_connection board 12 Conductor for voltage measurement 13 Protruding part 14 Detachment Locking structure 15 Recessed recessed part 17 Storage recessed part 18 Magnet 19 Protective cover 21 Opening part 22 Window part 23 Terminal block receiving cap 51 Power distribution board 52 Terminal screw

Claims (7)

A trip lock terminal block for connecting and disconnecting two terminal screws (52) for connecting wiring to the switchboard (51),
A plug (1) in which a conductor (3) is formed around an insert that is inclined so that the front end side is thin, and a knob (4) made of an insulator is formed on the other end;
A first metal conductive plate (1) having a latching portion (9) for latching on the terminal screw (52) at one end and a movable conductor (6) contacting the conductor (3) of the plug (1) at the other end ( 7) and
A second metal conductive plate (1) is formed with a latching portion (9) that latches on the terminal screw (52) at one end, and a movable conductor (6) that contacts the conductor (3) of the plug (1) at the other end. 8) and
A terminal block holder (2) in which both the movable conductors (6) of the first metal conductive plate (7) and the second metal conductive plate (8) are housed and fixed;
By connecting the first and second metal conductive plates (7, 8) of the terminal block holder (2) to each of the two terminal screws (52), and inserting and removing the plug (1), the conductor ( A trip lock terminal block, wherein 3) is configured such that the first metal conductive plate (7) and the second metal conductive plate (8) are conductive and non-conductive. The plug (1) is provided with a retaining structure (14) including a protruding portion (13) so that the plug (1) is not detached from the terminal block holder (2). The trip lock terminal block according to claim 1. The retaining structure (14)
An insulating plate formed with a fixing recess (15) is supported by an elastic member (16) on the plug insertion part (5) of the terminal block holder (2), and the plug ( 4. The trip lock terminal block according to claim 3, wherein the projecting portion (13) formed on the insulator of (1) is configured to be detachably engaged. The retaining structure (14)
A housing recess (17) is opened in the insulator of the plug (1), and a coil spring (11) is inserted into the housing recess (17) together with a projecting portion (13), which is inserted into the terminal block holder (2). 4. The trip lock terminal block according to claim 3, wherein the trip lock terminal block is configured to be detachably engaged with a fixing concave portion (15) formed in the plug insertion portion (5). In the state where the plug (1) is inserted into the terminal block holder (2), a protective cover (19) attached to the periphery with a magnet (18) attracted to the switchboard (51) so as to cover and fix them. The trip lock terminal block according to claim 1, further comprising: The trip-lock terminal block according to claim 1, wherein a voltage measuring conductor (12) is provided around the plug insertion portion (5) of the terminal block holder (2). A trip lock terminal block for connecting and disconnecting two terminal screws (52) for connecting wiring to the switchboard (51),
A plug (1) in which a conductor (3) is formed around an insert that is inclined so that the front end side is thin, and a knob (4) made of an insulator is formed on the other end;
A first metal conductive plate (1) having a latching portion (9) for latching on the terminal screw (52) at one end and a movable conductor (6) contacting the conductor (3) of the plug (1) at the other end ( 7) and
A second metal conductive plate (1) is formed with a latching portion (9) that latches on the terminal screw (52) at one end, and a movable conductor (6) that contacts the conductor (3) of the plug (1) at the other end. 8) and
The movable conductor (6) of the first metal conductive plate (7) and the second metal conductive plate (8) is housed and fixed, and an opening (21) is formed on one surface of the housing so as to cover the existing terminal block. And a terminal block cap (23) having an open window (22) on the other surface, and
By connecting the first and second metal conductive plates (7, 8) of the terminal block receiving cap (23) to the two terminal screws (52) respectively, and inserting and removing the plug (1), A trip lock terminal block, wherein the conductor (3) is configured such that the first metal conductive plate (7) and the second metal conductive plate (8) are conductive and non-conductive.

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