JP4737559B2 - Distribution board - Google Patents

Description

  The present invention relates to a distribution board used in a house or a store.

  Conventionally, in a distribution board, as described in Patent Document 1, for example, a main breaker and a plurality of branch breakers are arranged on a base of a case attached to a wall surface, and wiring space above and below these breakers The indoor wiring drawn into the base from the inside of the wall through is connected to each breaker.

  The indoor wiring connected to the branch breaker includes a two-core electric wire, a two-core electric wire and an earth wire, or a three-core electric wire including an earth wire. The ground wire is connected to a ground relay terminal disposed at the lower edge of the base, and the ground connection is made to the ground or the like via the ground relay terminal.

The ground relay terminal is formed by screwing a plurality of screw connection terminals to a terminal plate, and an earth wire for indoor wiring and a ground wire connected to the ground or the like are connected to each screw connection terminal. To connect the ground wire, loosen the screw connection terminal, attach the crimp terminal to the ground wire and attach it to the screw connection terminal, or round the tip of the ground wire and attach it to the screw connection terminal. Connect and fix the ground wire by tightening.
Japanese Patent Laid-Open No. 6-315211

  However, since the ground relay terminal used in the conventional distribution board is composed only of the screw connection terminal, to connect the ground wire, loosen the screw connection terminal and fix the crimp terminal to the ground wire. After being attached to the screw connection terminal or by rounding the tip of the ground wire and attaching it to the screw connection terminal, the screw connection terminal must be tightened, and there is a problem that the connection work at the time of construction is troublesome. Moreover, the same problem occurs when the ground wire is once removed during maintenance inspection.

  In addition, three-core electric wires including ground wires are increasingly used for indoor wiring connected to the branch breaker, and this three-core electric wire is cut to an appropriate length for connecting to the branch breaker. If this happens, it may be difficult to connect the ground wire to the ground relay terminal.

  This invention is made | formed in view of such a point, and it aims at providing the distribution board which can connect an earth wire easily.

The distribution board according to claim 1 includes a case having a box-like base having an opening through which a ground wire can be drawn and a cover provided on the front surface of the base; a main breaker housed in the case; is accommodated in a plurality of branch breakers and connected to main breaker; elongated insulating cover having a plurality of insertion holes and a plurality of buttons holes opening toward the front is formed on the front surface so as to arranged in a row, this A common terminal plate provided along the longitudinal direction of the insulating cover on the rear surface side in the insulating cover, each connected to the terminal plate and connected to a ground wire provided facing each of the plurality of insertion holes locking connection terminals, release button and locking electrically connected is at both ends of the distribution設列to the terminal plate respectively provided in the connection terminals for respectively provided with locking connection terminal to said buttonhole A screw connection terminal for connecting a pair of ground wires, arranged in the case along the side edge of the case, and grounding the ground wire drawn into the case together with the wire connected to the branch breaker And a ground relay terminal.

According to the distribution board according to claim 1, since the lock connection terminal and the screw connection terminal are provided with the ground relay terminal that is electrically connected to each other, it is possible to cope with both connection methods, and by the lock connection terminal. The ground wire can be easily connected. In addition, since the plurality of lock connection terminals of the ground relay terminal are arranged in parallel in one row and the screw connection terminal is provided at the end of the row of the lock connection terminal, a plurality of ground wires can be connected and the screw at the end The connection terminal can be easily operated. Furthermore, since the insertion hole of the ground relay terminal is provided toward the front of the insulating cover, the ground wire can be easily inserted and removed from the front side .

  Hereinafter, an embodiment of a distribution board according to the present invention will be described with reference to the drawings.

  1 is a front view with a part of the ground relay terminal omitted, FIG. 2 is a cross-sectional view of the ground relay terminal, FIG. 3 is a front view with the cover of the distribution board removed, and FIG. 4 is a door body of the distribution board. FIG. 5 is a perspective view of a state in which the door body of the distribution board is opened.

  4 and 5, the distribution board includes a horizontally long case 1. The case 1 includes a base 2 attached to a wall surface and a cover 3 attached to the front surface of the base 2 so as to be openable and detachable. Yes.

  On the front surface of the cover 3, a concave portion 4 is formed in a central region excluding the peripheral edge portion, and an operation surface portion 5 is formed in the concave portion 4. The operation surface portion 5 is composed of a limiter panel 6, a main panel 7 and a branch panel 8 fitted in the recess 4. The main panel 7 is formed with a window hole 9 for the main breaker, and the branch panel 8 is used for the branch breaker. A plurality of window holes 10 are formed in two rows.

  A door body 11 that covers the front surface of the recess 4 is attached to the front surface of the cover 3 so as to be openable and closable via hinges 12 on both sides of the upper portion. An open / close button 13 is attached to release the lock by a moving operation. The door body 11 is made of, for example, an opaque resin.

  Further, in FIG. 3, the base 2 has an attachment plate portion 21 that is attached to the wall surface, and an edge portion 22 is formed so as to protrude forward from the peripheral portion of the attachment plate portion 21. A plurality of mounting holes 23 that are attached to the wall surface by screws or the like are formed in the mounting plate portion 21, and the upper wall of the limiter installation area and the main breaker installation area, and the upper and lower positions of the branch breaker installation area An opening 24 for drawing in the electric wire of the indoor wiring is formed. Further, a terminal mounting base 25 for a ground relay terminal is formed on the right edge portion of the mounting plate portion 21.

  A distribution board unit 31 is disposed on the base 2. The distribution board unit 31 includes a limiter base 32, a main breaker 33, and a plurality of branch breakers 34. The limiter base 32 and the main breaker 33 are attached to an attachment plate 35 and attached to the attachment plate portion 21 of the base 2 via the attachment plate 35. The branch breaker 34 is attached in parallel along the upper and lower mounting bars 36, and is attached to the mounting plate portion 21 of the base 2 via the upper and lower mounting bars 36.

  On the front surface of the main breaker 33, an operation portion 33a for switching a switch by a swinging operation in the vertical direction is disposed, and the operation portion 33a is disposed so as to protrude from the window hole 9 of the operation surface portion 5.

  At the center of the front surface of the branch breaker 34, there is disposed an operation portion 34a for switching the switch by a swinging operation in the vertical direction, and this operation portion 34a is disposed so as to protrude from the window hole 10 of the operation surface portion 5. A pair of wire connecting portions 34b are formed on the upper and lower parts of the front surface of the branch breaker 34, and the opposite wire connecting portions 34b of the branch breakers 34 arranged vertically are connected to the main breaker 33 with unillustrated wires. Covered with a cover 37. Therefore, the wire connecting portion 34b covered with the cover 37 is not shown in FIG.

  Upper and lower wiring spaces 38 and 39 are formed between the upper and lower edges 22 of the base 2 and the upper and lower portions of the distribution board unit 31.

  In addition, a ground relay terminal 41 is connected to the terminal mounting base 25 of the base 2 for connecting a ground wire drawn into the distribution board together with an electric wire connected to each branch breaker 34. As shown in FIGS. 1 and 2, the ground relay terminal 41 has an insulating cover 42 that is elongated in the vertical direction. A plurality of insertion holes 43 that open forward are formed on the front surface of the insulating cover 42 in the vertical direction. Button holes 44 that are arranged side by side at equal intervals along the direction and that open toward the front are formed in the side portions of the respective insertion holes 43. The rear surface of the insulating cover 42 is formed with an opening, and a terminal accommodating portion 45 is formed in the insulating cover 42 to communicate with each insertion hole 43 and button hole 44. Flange portions 46 are formed at both ends of the insulating cover 42, and attachment screws 47 for attaching the ground relay terminals 41 by screwing the terminal attachment bases 25 to the respective flange portions 46 are inserted.

  A conductive terminal plate 48 is fitted to the rear surface of the insulating cover 42, and both ends of the terminal plate 48 extend longer than both ends of the insulating cover 42. The terminal plate 48 is formed with a connection plate portion 49 disposed on one side of the ground wire insertion area facing the insertion hole 43.

  Each terminal storage portion 45 of the insulating cover 42 is provided with a lock connection terminal 50 for locking and connecting the ground wire inserted into the insertion hole 43. An attachment piece 51 is formed in the intermediate portion of each lock connection terminal 50 and is held between the insulating cover 42 and the terminal plate 48 in the terminal housing 45. A locking piece 52 is formed at one end to protrude into the ground wire insertion area and prevent it from slipping out, and is bent into a substantially U shape at the other end of the mounting piece 51. A crimping piece 53 for crimping the ground wire inserted into the connection plate 49 is formed.

  A release button 54 is inserted and arranged in each button hole 44 of the insulating cover 42 from the inner terminal storage portion 45.

  Screw connection terminals 55 are connected to the front surfaces of both end portions of the terminal plate 48 protruding from the insulating cover 42, for example, to connect a ground wire for ground connection to the ground or the like.

  As shown in FIG. 3, when the ground relay terminal 41 is attached to the terminal mounting base 25, the insertion hole 43 is closer to the inner side of the base 2 and the release button 54 is closer to the outer side of the base 2, that is, the insertion hole 43 is to the left. And a release button 54 is arranged on the right side.

  Next, the operation of the present embodiment will be described.

  When installing the distribution board, the base 2 is fixed to the wall surface with the cover 3 removed, and the electric wires for indoor wiring in the wall surface are drawn into the base 2 through the opening 24 of the base 2, and the main breaker 33 and the branch breaker 34 Connect to a compatible device.

  The indoor wiring connected to the branch breaker 34 includes a two-core electric wire, a two-core electric wire and a ground wire, or a three-core electric wire including a ground wire. These power supply wires and ground wires are cut to a length suitable for wiring, the power supply wires are connected to the wire connection portion 34b of the branch breaker 34, and the ground wires are connected to the ground relay terminal 41.

  An earth wire connected to the ground, for example, on the ground or the like drawn into the distribution board is also connected to the earth relay terminal 41.

  When these ground wires are single wires, the ground wire is locked and connected by the lock connection terminal 50 by inserting the tip of the ground wire into the insertion hole 43 from the front. When the ground wire is a stranded wire, the screw connection terminal 55 is loosened, the ground wire is entangled with the screw connection terminal 55, and then the screw connection terminal 55 is tightened to connect the ground wire.

  Then, after completing the wiring, the cover 3 is attached to the front surface of the base 2 to complete the construction.

  Also, when removing the ground wire connected to the lock connection terminal 50 of the ground relay terminal 41 during maintenance inspection, etc., the lock connection terminal for the ground wire is pushed by pushing the release button 54 from the front. 50 locks are released, and the ground wire can be pulled out from the insertion hole 43 in this state.

  As described above, since the ground relay terminal 41 includes both the lock connection terminal 50 and the screw connection terminal 55, both of the connection methods can be used, and the ground wire can be easily connected by the lock connection terminal 50. it can.

  Since the ground relay terminal 41 is arranged along the right edge of the base 2 in the vicinity of the branch breaker 34, for example, when connecting a three-core electric wire including a ground wire, the power supply connected to the branch breaker 34 There is no need to make the ground wire particularly long with respect to the electric wire, and even if the three-core electric wire is cut together, it can be connected to both the branch breaker 34 and the ground relay terminal 41. It can be improved. The same effect can be obtained even if the ground relay terminal 41 is disposed along the upper or lower edge of the base 2.

  In addition, since the plurality of lock connection terminals 50 of the ground relay terminal 41 are provided in one row and the screw connection terminal 55 is provided at the end of the row of the lock connection terminals 50, a plurality of ground wires are connected to the plurality of locks. While being able to connect to the terminal 50, the screw connection terminal 55 can be easily operated at the end.

  Also, since the insertion hole 43 of the ground relay terminal 41 is located closer to the inner side of the base 2 and the release button 54 is closer to the outer side of the base 2, that is, the insertion hole 43 is located on the left side and the release button 54 is located on the right side. You can pull out the ground wire with your left hand while pushing, and the ground wire inserted into the insertion hole 43 does not get in the way when you operate the release button 54, making it easy to operate the release button 54 Can be.

  In addition, since the insertion hole 43 of the ground relay terminal 41 is provided toward the front side of the base 2 and the release button 54 is provided so as to be operable from the front, it is possible to easily insert and remove the ground wire from the front direction.

  Although the horizontal distribution board has been described in the above embodiment, the same effect can be obtained by using the ground relay terminal 41 in the vertical distribution board and arranging the ground relay terminal 41 in the same manner. Is obtained.

It is the front view which abbreviate | omitted a part of earthing | grounding relay terminal which shows one embodiment of this invention. It is sectional drawing of a ground relay terminal same as the above. It is a front view of the state which removed the cover of the distribution board same as the above. It is a front view of the state which opened the door body of the distribution board same as the above. It is a perspective view of the state which opened the door body of the distribution board same as the above.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Case, 34 ... Branch breaker, 41 ... Ground relay terminal, 42 ... Insulation cover, 43 ... Insertion hole, 45 ... Terminal storage part, 50 ... Locking connection terminal, 54 ... Release button, 55 ... Screw connection terminal

Claims (1)

A case having a box-like base having an opening through which a ground wire can be drawn and a cover provided on the front surface of the base;
A main breaker housed in the case;
A plurality of branch breakers housed in a case and connected to the main breaker;
A long and narrow insulating cover formed on the front surface so that a plurality of insertion holes and a plurality of button holes that are open toward the front are arranged in a line, and is provided on the rear surface side of the insulating cover along the longitudinal direction of the insulating cover A common terminal plate, a lock connection terminal for ground wire connection provided to face each of the plurality of insertion holes and electrically connected to the terminal plate, and a lock connection provided to each of the button holes A side edge portion of the case having a pair of screw connection terminals for connecting to the ground wire, which are provided at both ends of the arrangement row of the release button for the terminal and the lock connection terminal, respectively, and electrically connected to the terminal plate A ground relay terminal that is disposed in the case along the ground and connects the ground wire that is drawn into the case together with the wire connected to the branch breaker;
A distribution board characterized by comprising:

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