JP6226271B2 - Distribution board - Google Patents

Description

  The present invention relates to a distribution board.

  A conventional distribution board has a main switch (main circuit breaker) to which external electric wires are connected to the primary side, a bus (conductive bar) connected to the secondary side of the main switch, and a plurality of units connected to the bus. The branch switch is housed in a metal cabinet (see, for example, Patent Document 1).

  The cabinet has a box with an open front, a protective plate that covers the front of the box so that the handles of the main switch and branch switch are exposed forward, and a door that covers the front of the box so that it can be opened and closed from the front of the protective plate And.

  In the box, a pair of base rails are provided on the back plate so that the longitudinal direction coincides with the vertical direction (vertical direction). Each base rail has a holding portion that holds the bolt head in a non-rotatable manner at equal intervals along the longitudinal direction. Internal devices such as a main switch and a branch switch are attached to the substrate. Then, the base plate is fixed to the base rail by inserting the bolt with the head held by the holding portion of each base rail into the insertion holes penetrating the left and right ends of the base plate, and tightening the nut to the bolt from the front of the base plate. .

JP 2011-36050 A

  By the way, in the above conventional example, since the width dimension (length dimension in the left-right direction) of the board is determined by the interval between the base rails, the gutter space in the cabinet may be narrowed by the board.

  This invention is made | formed in view of the said subject, and aims at expanding the gutter space, without enlarging a cabinet.

The distribution board according to the present invention includes a box having a front surface opened, a door that covers the opening of the box so as to be openable and closable, and a pair of base rails provided on a back plate of the box with a longitudinal direction aligned with the vertical direction. A plurality of bars fixed to the base rail at both ends in the left-right direction, a pair of mounting rails fixed to the bars with the longitudinal direction aligned with the vertical direction, and a substrate attached to the pair of mounting rails, The base rail is configured such that a plurality of first fixing portions to which the crosspieces can be fixed are arranged along a longitudinal direction, and the crosspieces can be fixed to the attachment rails. the second fixing portion of the plurality is configured so as to be arranged along the longitudinal direction such, the mounting rail has a plurality of attachment portions that can the substrate mounting is configured so as to be arranged along the longitudinal direction, the first fixing Has a large-diameter hole through which the head of the bolt can be inserted, and a small-diameter hole connected to the large-diameter hole, and the small-diameter hole cannot be inserted through the head and has a shaft portion of the bolt. The bolt is configured so that it can be inserted, the shaft portion restricts rotation of the bolt inserted into the small diameter hole through the large diameter hole, and the shaft portion is raised with respect to the back plate. It is comprised so that it may hold | maintain and the said cross has the screw insertion hole in which the said axial part of the said bolt is penetrated at the both ends of a longitudinal direction, It is characterized by the above-mentioned.

  The distribution board preferably includes a height adjusting member that is interposed between the rail and the mounting rail so that the mounting rail is brought close to the opening of the box.

  In the distribution board of the present invention, since the board is attached to the base rail via the rail and the mounting rail, the mounting position of the mounting rail to the rail can be adjusted according to the size of the board, and the cabinet is enlarged. There is an effect that the gutter space can be expanded without doing so.

It is a partially omitted plan view showing an embodiment of a distribution board according to the present invention. It is sectional drawing same as the above.

  Hereinafter, an embodiment of a distribution board according to the present invention will be described in detail with reference to the drawings. The distribution board according to the present embodiment is a so-called main branching board that is installed in an apartment house or a tenant building and aims to branch one or more trunk lines drawn from the power system into a plurality of trunk lines. . However, the distribution board to which the technical idea of the present invention can be applied is not limited to the main branch board of the present embodiment.

  As shown in FIGS. 1 and 2, the distribution board (main branch board) of the present embodiment includes a cabinet 1 and a plurality (two in the illustrated example) of internal unit blocks 5 (5A, 2). 5B).

  The cabinet 1 includes a rectangular box-shaped box 2 whose front surface is open, a door 3 that closes the front surface of the box 2 so as to be openable and closable, and a protective plate 4 that is disposed between the door 3 and the front surface of the box 2. And the cabinet 1 is installed along the wall of a building, or embedded in the wall.

  The box 2 is formed into a rectangular box shape having a back plate 20, a pair of side plates 21, a top plate 22, and a bottom plate (not shown) by processing a metal plate such as a steel plate.

  The door 3 is formed in a rectangle that covers the front surface of the box 2 by processing a metal plate such as a steel plate. Further, in order to improve the strength of the door 3, all four sides are bent backward (see FIG. 2). Further, the door 3 is supported by a plurality of hinges 210 attached to the front end of the side plate 21 on the right side of the box 2. As a result, the door 3 is configured to be rotatable between a closed position (the position shown in FIG. 2) that closes the front surface of the box 2 and an open position that opens the front surface of the box 2.

  The protective plate 4 is formed in a rectangular shape that covers the front surface of the box 2 and is slightly smaller than the door 3 by processing a metal plate such as a steel plate. The protective plate 4 is detachably attached to the box 2 and is configured to be rotatable between a closed position (see FIG. 2) that closes the front surface of the box 2 and an open position that opens the front surface of the box 2. Is done. The protective plate 4 is provided with a plurality of window holes (not shown), and in the closed position, the handles 500 and 510 of the internal unit (the main switch 50 and the branch switch 51) are exposed forward through the window holes. (See FIG. 2).

  As shown in FIG. 1, a pair of base rails 24 are attached to the back plate 20 of the box 2 by an appropriate method such as welding, screwing, or caulking. In FIG. 1, the side plate 21, the top plate 22, the bottom plate, the door 3, and the protection plate 4 of the box 2 are not shown.

  The base rail 24 is formed into a long bowl shape by processing a metal plate, and is attached near the left and right ends of the back plate 20 so that the longitudinal direction coincides with the vertical direction. Further, the base rail 24 is provided with a plurality of first fixing portions 240 at equal intervals along the longitudinal direction.

  The first fixing portion 240 includes a large-diameter hole 2400 through which the head of the bolt 241 (see FIG. 2) can be inserted, and a small-diameter hole 2401 through which the head cannot be inserted and the shaft of the bolt 241 can be inserted. Have. That is, the bolt 241 is moved to the small diameter hole 2401 after the head portion is inserted from the large diameter hole 2400, and the shaft portion is held in a state of protruding to the front of the back plate 20 through the small diameter hole 2401. That is, the bolt 241 is held by the first fixing portion 240 in a state in which the rotation is restricted and the shaft portion stands vertically with respect to the back plate 20.

  A plurality of inner unit blocks 5 (5A, 5B) are attached to the pair of base rails 24. The inner unit block 5 includes an inner unit, a substrate 52, a crosspiece 53, a mounting rail 54, a height adjusting member 55, a first substrate mounting plate 56, and a second substrate mounting plate 57.

  The crosspiece 53 is formed in a long rectangular plate shape by a metal plate, and both side edges along the longitudinal direction are bent back (see FIG. 2). Further, the crosspiece 53 is provided with a pair of screw insertion holes 530 at both ends in the longitudinal direction. Furthermore, the crosspiece 53 is provided with a plurality of second fixing portions 531 at intervals along the longitudinal direction (see FIG. 1). The second fixing portion 531 has a large-diameter hole and a small-diameter hole in the same manner as the first fixing portion 240, and the head portion of the bolt 241 inserted through the large-diameter hole is moved to the small-diameter hole. Is configured to hold the bolt 241 in a state where it stands upright and can rotate with respect to the back plate 20 (see FIG. 2).

  The mounting rail 54 is formed in a square hook shape by bending and elongating a long metal plate in the same direction along the longitudinal direction. A plurality of screw insertion holes 540 are provided at equal intervals along the longitudinal direction in the bottom plate of the mounting rail 54 (see FIG. 1). Note that these screw insertion holes 540 correspond to mounting portions for mounting (screwing) the substrate 52.

  The height adjusting member 55 is formed in a rectangular tube shape by bending a metal plate (see FIG. 2). Further, the height adjusting member 55 has a screw insertion hole (not shown) passing through the center of the pair of bottom walls facing each other in the front-rear direction.

  One internal unit block 5A has an internal unit for branching the main line (three main switches 50A for branching the main line). As shown in FIG. 2, the board 52A to which these three main switches 50A are attached has a first mounting part 520A, a second mounting part 521A, and a vertical wall connecting the first mounting part 520A and the second mounting part 521A. 522A is integrally formed by bending a metal plate.

  Three main switches 50A are mounted side by side in the vertical direction (vertical direction) on the first mounting portion 520A. Further, on the second mounting portion 521A, three mounting bases 523 formed in a prismatic shape with an insulating material such as synthetic resin are mounted side by side in the width direction (left-right direction). Each of the three mounting bases 523 has a bus bar (conductive bar 6) screwed to the front surface thereof. Furthermore, a separator 7 made of a material having electrical insulation properties and configured to keep the distance between the conductive bar 6 and the protective plate 4 at a predetermined value or more is screwed to the second mounting portion 521A.

  The conductive bar 6 is formed in a narrow plate shape with a metal material having a relatively high electrical conductivity such as copper or a copper alloy and being inexpensive. The conductive bar 6 has a plurality of screw insertion holes 601 provided at equal intervals along the longitudinal direction, and is screwed to the mounting base 523 with screws (not shown) inserted into the screw insertion holes 601. (See FIG. 2). The tip of an external electric wire (not shown) is connected to one end (lower end) of the conductive bar 6.

  In each main switch 50A attached to the first attachment portion 520A, the primary terminal 501 is connected to the conductive bar 6 by a metal branch bar 58. The branch bar 58 has one end connected to a primary terminal 501 formed of a screw terminal and the other end screwed to the conductive bar 6. The branch bar 58 and the conductive bar 6 are fixed by screws 61 that are inserted into the screw insertion holes 602 of the conductive bar 6.

  The first substrate mounting plate 56 and the second substrate mounting plate 57 are both formed into a square shape by bending both sides along the longitudinal direction of the long metal plate in the same direction. The first board mounting plate 56 has a width dimension in the front-rear direction (height dimension in FIG. 2) larger than that of the second board mounting plate 57.

  The first board mounting plate 56 is screwed to the first mounting portion 520A of the board 52A and the left mounting rail 54, respectively. The second board mounting plate 57 is screwed to the second mounting portion 521A of the board 52A and the right mounting rail 54, respectively. As a result, the first attachment portion 520A and the second attachment portion 521A are attached to the attachment rail 54 so as to be parallel to the back plate 20 of the box 2 (see FIG. 2).

  The other inner unit block 5B is provided with one main switch 50B and a plurality of (16 in the illustrated example) branch switches 51 connected to the secondary side of the main switch 50B.

  The main switch 50B is attached to the rectangular flat board 52B1 with the secondary terminal 502B facing down. Then, one end of an L-shaped connecting bar 59 is screwed to the secondary terminal 502B of the main switch 50B. Further, the other ends of the three connecting bars 59 are connected to the tips (upper ends) of three main bars (not shown) by screws. Further, the three main bars are held on a holding base 524 made of an insulating material such as a synthetic resin so as to be arranged in parallel at intervals along the front-rear direction (direction perpendicular to the paper surface in FIG. 1). The holding base 524 is attached to the center of the rectangular flat plate-like substrate 52B2.

  The 16 branch switches 51 are divided into 8 pieces, and are arranged on the left and right sides of the holding base 524 in the vertical direction and attached to the substrate 52B2. Each branch switch 51 has a plug-in type primary terminal (not shown) connected to the main bar held by the holding base 524. Since plug-in terminals are conventionally known, detailed illustration and description of the structure are omitted.

  These two substrates 52B1 and 52B2 are attached to the attachment rail 54 via a substrate attachment plate (not shown) (see FIG. 1).

  The internal unit block 5B configured as described above plays a role of distributing power to an electrical device such as a lighting device installed in a common part (such as a common entrance or a corridor) of an apartment house, for example.

  As described above, the distribution board according to the present embodiment includes the box 2 whose front surface is open, the door 3 that closes the opening of the box 2 so as to be openable and closable, and the back plate 20 of the box 2 whose longitudinal direction is aligned vertically. And a pair of base rails 24 provided. Further, the distribution board of the present embodiment includes a plurality of bars 53 whose both ends in the left-right direction are fixed to the base rail 24, and a pair of mounting rails 54 that are fixed to the bars 53 with their longitudinal directions aligned with the vertical direction. A substrate 52 attached to the pair of attachment rails 54, and an internal unit attached to the substrate 52. The base rail 24 is configured such that a plurality of first fixing portions 240 to which the crosspiece 53 can be fixed are arranged along the longitudinal direction. The crosspiece 53 is configured such that a plurality of second fixing portions 531 to which the mounting rail 54 can be fixed are arranged along the longitudinal direction. The mounting rail 54 is configured such that a plurality of mounting portions (screw insertion holes 540) to which the substrate 52 can be mounted are arranged along the longitudinal direction.

  Since the distribution board of the present embodiment is configured as described above, the gutter space can be expanded without increasing the size of the cabinet 1. In other words, when the substrate 52 is attached directly to the base rail 24 or via the substrate attachment plate 56 as in the conventional example, the width of the substrate 52 (the length in the left-right direction) regardless of the size or number of internal units to be attached. ) Is substantially equal to the interval between the base rails 24. As a result, the gutter space in the box 2 is narrowed by the substrate 52 (and the substrate mounting plate 56).

  On the other hand, in the distribution board of this embodiment, the substrate 52 is attached to the base rail 24 via the crosspiece 53 and the attachment rail 54, so the attachment position of the attachment rail 54 with respect to the crosspiece 53 is the size of the substrate 52 ( It can be adjusted according to the width. As a result, as shown in FIGS. 1 and 2, the gutter space (area surrounded by the broken line X) of the cabinet 1 (box 2) having the same size can be increased. And the improvement of workability | operativity at the time of connecting an electric wire (not shown) to the secondary side terminal of 50 A of main switches can be aimed at by expanding a gutter space.

  In addition, the distribution board according to the present embodiment includes a height adjusting member 55 that is interposed between the crosspiece 53 and the mounting rail 54 and configured to bring the mounting rail 54 close to the opening of the box 2. By providing such a height adjusting member 55, members such as the substrate 52, the crosspiece 53 and the mounting rail 54 are commonly used for the box 2 having different depth dimensions (depth dimensions in the front-rear direction). Can store the internal organs.

1 cabinet 2 box 3 door 4 protection plate
24 Base rail
50 Main switch (internal unit)
51 Branch switch (internal unit)
52 Board
53 Pier
54 Mounting rail
240 1st fixed part
531 Second fixed part
540 Screw insertion hole (Mounting part)

Claims (2)

A box having a front surface opened; a door for closing the opening of the box so as to be openable; a pair of base rails provided on a back plate of the box with a longitudinal direction aligned with a vertical direction; A plurality of crosspieces fixed to the rails, a pair of attachment rails fixed to the crosspieces with the longitudinal direction aligned with the vertical direction, a board attached to the pair of attachment rails, and an internal unit attached to the board With
The base rail is configured such that a plurality of first fixing portions to which the crosspiece can be fixed are arranged along the longitudinal direction,
The crosspiece is configured such that a plurality of second fixing portions to which the mounting rail can be fixed are arranged along the longitudinal direction,
The mounting rail is configured such that a plurality of mounting portions to which the substrate can be mounted are arranged along the longitudinal direction ,
The first fixing portion has a large-diameter hole through which a bolt head can be inserted and a small-diameter hole connected to the large-diameter hole, and the small-diameter hole cannot be inserted through the head. The shaft portion of the bolt is configured to be insertable, the shaft portion restricts the rotation of the bolt inserted into the small diameter hole through the large diameter hole, and the shaft portion is raised with respect to the back plate. Configured to hold the bolt in a state;
The distribution board characterized in that the crosspiece has screw insertion holes through which the shaft portions of the bolts are inserted at both ends in the longitudinal direction .   The distribution board according to claim 1, further comprising a height adjustment member interposed between the bar and the mounting rail and configured to bring the mounting rail closer to the opening of the box.

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