JP6252938B2 - 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 is provided with holding portions that hold the heads of the bolts in a 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 an apartment house, a tenant building, etc., a distribution board (a trunk branch board) for branching a plurality of trunk lines into a plurality of trunk lines is used. In such a distribution board (main branching board), the number of external electric wires drawn into the cabinet increases, and there is a problem that the cabinet is increased in size to secure a necessary gutter space.

  This invention is made | formed in view of the said subject, and aims at suppressing the enlargement of 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. includes a plurality of internal unit connected to an external wire is drawn into the box, a plurality of substrates that said device is mounted, and a fixing member for fixing the substrate to the pair of base rails, wherein The substrate has a first mounting portion to which the inner unit is mounted, a second mounting unit to which the inner unit is mounted, and a vertical wall that connects the first mounting unit and the second mounting unit in a staircase shape. And the fixing member forms a space for passing the external electric wire between the substrate and the back plate , and the first attachment portion and the second attachment portion of the substrate are connected to the fixing member. configured so as to be parallel to the rear plate Is the fact characterized.

  In this distribution board, the fixing member includes a plurality of rails whose both ends in the left-right direction are fixed to the base rail, a pair of mounting rails that are fixed to the rails with the longitudinal direction aligned with the vertical direction, An auxiliary metal fitting interposed between the mounting rail and the substrate, the base rail is configured such that a plurality of first fixing parts to which the beam can be fixed are arranged along the vertical direction, A plurality of second fixing portions to which the mounting rail can be fixed are arranged in the left-right direction, and the mounting rail has a plurality of mounting portions to which the auxiliary metal fittings can be arranged in the vertical direction. Preferably, the auxiliary metal fitting is configured such that a rear end side is attached to the attachment portion of the attachment rail and the substrate is attached to the front end side.

  In the distribution board of the present invention, since the fixing member is configured to form a space for passing the external electric wire between the substrate and the back plate, the gutter space in the cabinet may be occupied by the external electric wire. There is an effect that the enlargement of the cabinet can be suppressed.

It is sectional drawing which shows embodiment of the distribution board which concerns on this invention. It is the top view which abbreviate | omitted a part same as the above. It is the top view which abbreviate | omitted partially showing the comparative example 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. Moreover, in order to improve the strength of the door 3, all four sides are bent backward (see FIG. 1). 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. 1) 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. 1) 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. 1).

  As shown in FIG. 2, 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. 2, illustration of the side plate 21, the upper plate 22, the lower plate, the door 3, and the protective plate 4 of the box 2 is omitted.

  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. 1) can be inserted, and a small-diameter hole 2401 through which the head cannot be inserted and the shaft portion 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.

  Then, two inner unit blocks 5 (5A, 5B) are attached to the pair of base rails 24. However, these two internal unit blocks 5A and 5B have a common configuration. Therefore, the same components of the two internal unit blocks 5A and 5B are denoted by the same reference numerals, and only one internal unit block 5A will be described, and detailed description of the other internal unit block 5B will be omitted.

  The internal unit block 5A includes an internal 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. 1). 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. 2). 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 while standing vertically with respect to the back plate 20 and being rotatable (see FIG. 1).

  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. 2). 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. 1). 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.

  The internal unit block 5A has internal units for branching the main line (three main switches 50 for main line branching). As shown in FIG. 1, the substrate 52 to which these three main switches 50 are attached includes a first mounting portion 520, a second mounting portion 521, and a vertical wall connecting the first mounting portion 520 and the second mounting portion 521. 522 are integrally formed by bending the metal plate.

  Three main switches 50 are attached to the first attachment portion 520 side by side in the vertical direction (vertical direction). In addition, on the second mounting portion 521, 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 521.

  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. 1). 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 50 attached to the first attachment portion 520, 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. 1) larger than that of the second board mounting plate 57.

  The first board mounting plate 56 is screwed to the first mounting portion 520 of the board 52 and the left mounting rail 54, respectively. The second board mounting plate 57 is screwed to the second mounting portion 521 of the board 52 and the right mounting rail 54, respectively. As a result, the first attachment portion 520 and the second attachment portion 521 are attached to the attachment rail 54 so as to be parallel to the back plate 20 of the box 2 (see FIG. 1).

  In addition, the distribution board of this embodiment includes a terminal block 8 in addition to the two internal unit blocks 5A and 5B. The terminal block 8 includes a substrate 80 and a terminal block 81 attached to the substrate 80. The substrate 80 is formed in a flat rectangular plate shape with a metal plate, and a plurality of screw insertion holes 800 are provided at equal intervals on both ends in the longitudinal direction.

  The terminal block 81 is provided with three primary screw terminals 811 and three secondary screw terminals 812 arranged in two rows on the front surface of a base 810 made of a synthetic resin molding. Yes. The three primary screw terminals 811 are configured to be electrically connected to adjacent ones of the secondary secondary screw terminals 812. The terminal block 81 is attached to the substrate 80 by screwing the base 810.

  The board 80 is attached to the pair of attachment rails 54 by tightening nuts to bolts (not shown) that are inserted into the screw insertion holes 800 at both ends in the longitudinal direction and the screw insertion holes 540 of the attachment rail 54. The terminal block 8 is disposed below the lower inner unit block 5A.

  Here, a crimp terminal 90 attached to one end of the electric wire 9 is screwed to the screw terminal 812 on the secondary side of the terminal block 81. Each wire 9 is passed through a space Y (a space surrounded by a dashed line in FIG. 1) formed between the back plate 20 and the crosspiece 53 and the first mounting portion 520A of the substrate 52, and the other end. The crimp terminal 90 attached to the screw is connected to the lower end of the conductive bar 6 of the upper inner unit block 5B by screwing.

  Here, with reference to FIG. 3, the comparative example of the electricity distribution panel of this embodiment is demonstrated. However, members that are functionally common to the distribution board of the present embodiment will be given the same reference numerals even if their shapes and dimensions are slightly different.

  A pair of base rails (not shown) are attached to the back plate 20 of the box 2. The mounting frame 10 is attached to these base rails by screwing. The mounting frame 10 includes a pair of vertical plates 11 formed in a long rectangular flat plate shape, and a horizontal plate 12 that connects the upper end and the lower end of each vertical plate 11. In the vertical plate 11, a large number of screw insertion holes 110 are provided in a plurality of rows at equal intervals along the longitudinal direction. The mounting frame 10 is disposed in front of the back plate 20 by screwing both ends of each horizontal plate 12 to both upper and lower ends of each base rail 24. Two internal unit blocks 5A and 5B and a terminal block 8 are mounted on the base rail 24 side by side in the vertical direction.

  Here, in the comparative example shown in FIG. 3, since the substrate 52 is directly screwed to the base rail 24, there is a space Y that allows the electric wire 9 to pass between the back plate 20 and the substrate 52. do not do. Therefore, in this comparative example, as shown in FIG. 3, the electric wire 9 must be passed through the gutter space next to the inner unit block 5A. As a result, since the gutter space is occupied by the three electric wires 9, the workability of the work (wiring work) of connecting and routing the electric wire (not shown) to the secondary terminal 502 of the main switch 50 is lowered. To do. Therefore, if it is going to suppress the fall of workability | operativity, it will be necessary to enlarge the cabinet 1 in order to ensure a required gutter space.

  On the other hand, the distribution board of this embodiment can pass the electric wire 9 through the space Y between the substrate 52, the back plate 20 and the crosspiece 53 (see FIG. 2). Without occupying space, it is possible to suppress a decrease in workability of wiring work without increasing the size of the cabinet 1.

  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. The distribution board according to the present embodiment includes a plurality of internal units (main switch 50) connected to an external electric wire drawn into the box 2, a plurality of substrates 52 to which the internal units are attached, and a pair of substrates 52. Fixing members (crosspieces 53 and mounting rails 54) for fixing to the base rail 24. The fixing members (the crosspieces 53 and the mounting rails 54) are configured so as to form a space Y for passing an external electric wire (electric wire 9) between the substrate 52 and the back plate 20.

  Since the distribution board according to the present embodiment is configured as described above, the gutter space in the cabinet 1 is not occupied by the external electric wires (the electric wires 9), and the cabinet is used to suppress a reduction in workability of the wiring work. An increase in size of 1 can be suppressed.

  In addition, the fixing member includes a plurality of crosspieces 53 whose both ends in the left-right direction are fixed to the base rail 24, a pair of attachment rails 54 that are fixed to the crosspieces 53 with their longitudinal directions aligned with the vertical direction, Auxiliary metal fittings (height adjusting member 55 and board mounting plates 56, 57) interposed between the board 52 and the board 52 are provided. 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. Auxiliary metal fittings (height adjustment member 55 and board mounting plates 56, 57) are configured such that the rear end side is attached to the mounting portion (screw insertion hole 540) of the mounting rail 54, and the board 52 is attached to the front end side. The

  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 FIG. 1, the gutter space (area surrounded by the broken line X) of the cabinet 1 (box 2) having the same size can be expanded. 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.

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 Crosspiece (fixing member)
54 Mounting rail (fixing member)

Claims (2)

A box whose front surface is open, a door that can open and close the opening of the box, a pair of base rails that are provided on the back plate of the box with the longitudinal direction aligned with the vertical direction, and an external that is drawn into the box A plurality of internal units connected to the electric wires, a plurality of substrates to which the internal units are attached, and a fixing member for fixing the substrates to the pair of base rails,
The board has a first mounting portion to which the inner unit is mounted, a second mounting unit to which the inner unit is mounted, and a vertical wall that connects the first mounting unit and the second mounting unit. Is formed,
The fixing member forms a space for passing the external electric wire between the substrate and the back plate , and the first mounting portion and the second mounting portion of the substrate are parallel to the back plate. A distribution board characterized by being configured to do. The fixing member includes a plurality of rails whose left and right ends are fixed to the base rail, a pair of mounting rails whose longitudinal direction is aligned with the vertical direction and fixed to the rails, the mounting rails, and the substrate. Auxiliary metal fittings interposed between
The base rail is configured such that a plurality of first fixing portions to which the crosspieces can be fixed are arranged along the vertical 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 left-right direction,
The mounting rail is configured such that a plurality of mounting portions to which the auxiliary metal fitting can be mounted are arranged along the vertical direction,
The distribution board according to claim 1, wherein the auxiliary metal fitting is configured such that a rear end side is attached to the attachment portion of the attachment rail, and the substrate is attached to a front end side.

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