Distribution board boxes and distribution boards

Abstract

An object of the present disclosure is to make it possible to easily perform connection work during construction. [Solution] A distribution board box (2) that forms part of a distribution board cabinet and is attached to a wall of a facility includes a bottom wall (21) and a side wall (220). The bottom wall (21) is attached to the wall with its rear side facing the wall. The side wall (220) is plate-shaped and extends forward from the bottom wall (21). The side wall (220) is provided with a wire inlet (23) for passing electrical wires connected to an internal unit of the distribution board.

Description

[Technical Field]

[0001] The present disclosure generally relates to a distribution board box and a distribution board. More particularly, the present disclosure relates to a distribution board box that forms part of a distribution board cabinet and is attached to a wall of a facility, and a distribution board including the distribution board box. [Background technology]

[0002] Patent Document 1 describes a distribution board. This distribution board includes a base, a main breaker provided on the base, and branch breakers provided on the base so as to be aligned with the main breaker in a first direction. The base is formed with a first opening through which a first wiring connected to a primary terminal of the main breaker passes from the rear side of the base, and a second opening through which a second wiring connected to a secondary terminal of the branch breaker passes from the rear side.

[0003] In a front view of the base, the primary terminal of the main breaker and the secondary terminal of the branch breaker are arranged on the same side in a second direction perpendicular to the first direction, and the first opening and the second opening are arranged on the same side in the second direction relative to the main breaker and the branch breaker. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2023-26023 Summary of the Invention [Problem to be solved by the invention]

[0005] When installing a distribution board on a wall, the process of connecting the electrical wires to the breaker was time-consuming.

[0006] An object of the present disclosure is to provide a distribution board box and a distribution board that enable easy connection work during installation. [Means for solving the problem]

[0007] A distribution board box according to one aspect of the present disclosure constitutes part of a cabinet for a distribution board. The distribution board box is attached to a wall of a facility. The distribution board box includes a bottom wall portion and a side wall portion. The bottom wall portion is attached to the wall with its rear side facing the wall. The side wall portion is plate-shaped and extends forward from the bottom wall portion. The side wall portion is provided with a wire inlet for passing electrical wires connected to an internal unit of the distribution board.

[0008] A distribution board according to one aspect of the present disclosure includes the distribution board box and a breaker as the internal unit. [Effects of the Invention]

[0009] The present disclosure has the advantage that connection work can be easily performed during construction. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a perspective view of a distribution board according to an embodiment of the present disclosure, as viewed from the front side. [Figure 2] FIG. 2 is a front view of the distribution board with the cover open. [Figure 3] FIG. 3 is a front view of the distribution board with the cover and lid removed. [Figure 4] FIG. 4 is a perspective view of a distribution board box provided in the distribution board, as viewed from the front side. [Figure 5] FIG. 5 is a perspective view of the distribution board box as viewed from the rear side. [Figure 6] FIG. 6 is a side view of the distribution board box. [Figure 7] FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. [Figure 8] FIG. 8 is a perspective view of the first usage example of the distribution board box as viewed from the front side. [Figure 9] FIG. 9 is a side view of a first example of use of the distribution board box. [Figure 10] FIG. 10 is a rear view of the first example of use of the distribution board box. [Figure 11] FIG. 11 is a perspective view of a second usage example of the distribution board box as viewed from the front side. DETAILED DESCRIPTION OF THE INVENTION

[0011] A distribution board box and a distribution board according to an embodiment of the present disclosure will be described with reference to the accompanying drawings. However, the embodiment described below is merely one of various embodiments of the present disclosure. The embodiment described below can be modified in various ways depending on the design, etc., as long as the object of the present disclosure can be achieved. Furthermore, each diagram described in the embodiment described below is a schematic diagram, and the ratios of the sizes and thicknesses of the components in the diagram do not necessarily reflect the actual dimensional ratios.

[0012] (1) Implementation form (1.1) Distribution board The distribution board 10 (see Figures 1 and 2) is a distribution board that is applied to, for example, a facility. The distribution board 10 is attached, for example, to a wall A1 (see Figure 2) of the facility. The facility is, for example, a residential facility such as a detached house or each dwelling unit in an apartment building. In other words, the distribution board 10 is a residential distribution board. Note that the facility is not limited to a residential facility, and may be a non-residential facility such as a factory, a store, an office building, a commercial building, a hospital, or a school.

[0013] As shown in Figs. 1 to 3, a distribution board 10 of this embodiment includes a cabinet 1 and an internal unit 9. The cabinet 1 is in the shape of a hollow box. The cabinet 1 holds the internal unit 9 in a housed state.

[0014] For convenience, the following description will be given by defining three axes (X-axis, Y-axis, and Z-axis) of a right-handed three-dimensional Cartesian coordinate system for the distribution board 10 as follows. Specifically, the axes along the longitudinal and lateral directions of the cabinet 1 (more specifically, the distribution board box 2) are referred to as the Y-axis and Z-axis, respectively. The Y-axis and Z-axis are orthogonal to each other. The axis orthogonal to the Y-axis and Z-axis is referred to as the X-axis. For convenience, the direction along the X-axis is referred to as the front-to-rear direction, with the positive direction of the X-axis being referred to as "front" and the opposite direction being referred to as "rear." The direction along the Y-axis is referred to as the left-to-right direction, with the positive direction of the Y-axis being referred to as "right" and the opposite direction being referred to as "left." The direction along the Z-axis is referred to as the up-down direction, with the positive direction of the Z-axis being referred to as "up" and the opposite direction being referred to as "down." However, the definitions of axes and directions in this disclosure merely indicate the relative positional relationships between the components of the distribution board 10 and do not limit the orientation of the distribution board 10 during use, etc. For example, the distribution board 10 may be attached to the wall A1 so that the Z axis is aligned with the vertical direction, or may be attached to the wall A1 so that the Y axis is aligned with the vertical direction.

[0015] (1.2) Cabinet 1 and 2, the cabinet 1 includes a distribution board box (hereinafter also simply referred to as "box") 2, a cover 3, and a lid 4. The cabinet 1 is formed of a synthetic resin such as ABS (Acrylonitrile Butadiene Styrene) resin.

[0016] The box 2 is a part of the cabinet 1 that is attached to a wall A1 of the facility. The cabinet 1 may be attached to the wall A1 with at least a part of the box 2 embedded in the wall A1 (semi-embedded), or may be attached to the wall A1 with the entire box 2 exposed from the wall A1 (with the bottom wall portion 21 of the box 2 located forward of the wall surface).

[0017] 3 to 5, the box 2 is a rectangular box with an open front. An internal unit 9 is detachably attached to the box 2. The internal unit 9 is attached to the box 2, for example, with at least a portion of the internal unit 9 housed within the box 2.

[0018] A main opening 201 is formed in the bottom wall 21 of the box 2, penetrating the bottom wall 21 in the thickness direction (front-rear direction). Above and below the main opening 201 in the bottom wall 21, a plurality of screw insertion holes 202 are provided at equal intervals in the left-right direction along the edge of the main opening 201.

[0019] As shown in FIG. 2, the cover 3 includes a frame 30, a first panel 31, a second panel 32, and a third panel 33.

[0020] The frame body 30 is formed in the shape of a rectangular box with an open rear surface. As shown in FIG. 2, the frame body 30 has an opening 301. The opening 301 is formed in a rectangular shape that is longer in the left-right direction than in the up-down direction. The opening 301 penetrates the center of the frame body 30 in the thickness direction of the frame body 30. The frame body 30 is attached to the box 2 by a pair of attachment members 5 so as to cover the front open surface of the box 2.

[0021] As shown in Fig. 2, the first panel 31 is formed in the shape of a rectangular plate that is longer in the vertical direction than in the horizontal direction. The first panel 31 has a first exposure window 311. The first exposure window 311 is a hole for exposing the handle 911 of the main breaker 91 to the outside. The first exposure window 311 has a rectangular shape that is longer in the horizontal direction than in the vertical direction, and penetrates the first panel 31 in the thickness direction (front-rear direction).

[0022] As shown in Fig. 2, the second panel 32 is formed in the shape of a rectangular plate that is longer in the left-right direction than in the up-down direction. The second panel 32 has a second exposure window 321. The second exposure window 321 is a hole for exposing the handle 921 of the branch breaker 92 to the outside. The second exposure window 321 has a rectangular shape that is longer in the left-right direction than in the up-down direction, and penetrates the second panel 32 in the thickness direction (front-rear direction). In this embodiment, the second exposure window 321 is formed in a size that allows the handles 921 of the multiple branch breakers 92 and the front faces of the multiple branch breaker mounting members 93 to be exposed.

[0023] 2, a rectangular plate-shaped display member 6 is disposed in the vertical center of the second exposure window 321 of the second panel 32. The display member 6 is disposed so as to cover the plurality of branch breaker mounting members 93. The display member 6 has a display surface (front surface) capable of displaying information about the loads connected to each of the plurality of branch breakers 92.

[0024] 2, the third panel 33 is formed in the shape of a rectangular plate that is longer in the vertical direction than in the horizontal direction. The third panel 33 is attached to the frame body 30 so as to close the opening 301 of the frame body 30 together with the first panel 31 and the second panel 32.

[0025] As shown in Figures 1 and 2, the lid body 4 is attached to the cover 3 so as to be able to open and close between a first position and a second position. The first position is a closed position that covers the front surface of the cover 3 (see Figure 1). The second position is an open position that exposes the front surface of the cover 3 (see Figure 2). When the lid body 4 is in the second position, the handle 911 of the main breaker 91 and the handles 921 of the multiple branch breakers 92 are exposed forward.

[0026] (1.3) Internal unit 3, the internal unit 9 has a main breaker 91 and a plurality of (23 in the illustrated example) branch breakers 92. The internal unit 9 also has a plurality of current measuring devices, a first mounting base 94, a second mounting base 95, a first mounting member 96, and a second mounting member 97.

[0027] 2 and 3, the main breaker 91 includes a plurality of (three in the illustrated example) primary terminals 910, a plurality of (three) secondary terminals 919, contacts that electrically connect the primary terminals 910 and the secondary terminals 919, and a handle 911 for turning the contacts on and off. The plurality of primary terminals 910 and the plurality of secondary terminals 919 are in one-to-one correspondence.

[0028] Single-phase three-wire electric wires drawn in from a power source such as a commercial power system are connected to three primary terminals 910 of the main breaker 91. A conductive bar for the first voltage pole (L1 phase), a conductive bar for the second voltage pole (L2 phase), and a conductive bar for the neutral pole (N phase) of the single-phase three-wire wiring are connected to three secondary terminals 919 of the main breaker 91. Each conductive bar is formed from a conductive member into a long plate shape that is long in the left-right direction, and is located inside the box 2 at the center in the up-down direction and to the right of the main breaker 91.

[0029] The branch breakers 92 are arranged side by side in the left-right direction, separated into the upper and lower sides of each conductive bar. In this embodiment, as shown in Figures 2 and 3, 10 branch breakers 92 are arranged side by side in the left-right direction on the upper side of each conductive bar. In addition, 13 branch breakers 92 are arranged side by side in the left-right direction on the lower side of each conductive bar.

[0030] Each branch breaker 92 includes a pair of primary terminals, a pair of secondary terminals, contacts that electrically connect the primary terminals and the secondary terminals, and a handle 921 for turning the contacts on and off. There is a one-to-one correspondence between a pair of primary terminals and a pair of secondary terminals.

[0031] The branch breakers 92 are available for 100V and 200V. A pair of primary terminals of the 100V branch breaker 92 is electrically connected to one of the conductive bars of the first voltage pole and the second voltage pole, and to the neutral pole conductive bar. A pair of primary terminals of the 200V branch breaker 92 is electrically connected to the conductive bar of the first voltage pole and the conductive bar of the second voltage pole, respectively. Corresponding electric wires are electrically connected to the secondary terminals of the branch breakers 92. One or more loads, such as electrical appliances such as lighting fixtures and hot water supply equipment, or wiring devices such as outlets or wall switches, are connected to the electric wires connected to the secondary terminals of each branch breaker 92. Therefore, the distribution board 10 can supply power to electrical appliances connected to the secondary terminals of the branch breakers 92 via electric wires, or to electrical appliances connected to the outlets (e.g., air conditioners, television sets, etc.).

[0032] Each of the multiple current measurement devices is configured to measure a current flowing through a load connected to each of the multiple branch breakers 92. Each current measurement device includes, for example, a substrate and multiple coils. The substrate is a plate-like structure that is long in the left-right direction. Multiple holes are formed in the substrate. Terminals extending from the conductive bars and connected to the primary terminals of the branch breakers 92 are inserted into the multiple holes, respectively. The coils are, for example, Rogowski coils, and are formed around the holes in the substrate. In this embodiment, each current measurement device measures a current flowing through each of the multiple branch breakers 92. One of the multiple current measurement devices (upper side in FIG. 3) corresponds to the 10 branch breakers 92 arranged above each conductive bar and measures the currents flowing through each of the 10 branch breakers 92. The other of the multiple current measurement devices 93 (lower side in FIG. 3) corresponds to the 13 branch breakers 92 arranged below each conductive bar and measures the currents flowing through each of the 13 branch breakers 92.

[0033] 3, the main breaker 91 is attached to the first mounting base 94. With the main breaker 91 attached, the first mounting base 94 is attached to the first mounting member 96 by appropriate attachment means (for example, screws).

[0034] 3, a plurality of branch breakers 92 and a plurality of current measuring devices are attached to the second mounting base 95. Three conductive bars are also attached to the second mounting base 95. With the plurality of branch breakers 92, the plurality of current measuring devices, and the three conductive bars attached, the second mounting base 95 is attached to the first mounting member 96 and the second mounting member 97 by appropriate attachment means (for example, screws).

[0035] The first mounting member 96 is a member for mounting the main breaker 91 to the box 2. As shown in FIG. 3 , the first mounting member 96 is an H-shaped plate that is placed between the upper and lower edges of the main opening 201 of the box 2. The first mounting member 96 is mounted to the box 2 using, for example, a mounting screw S1. More specifically, the first mounting member 96 is mounted to the box 2 by inserting the mounting screw S1 attached to the first mounting member 96 into a screw insertion hole 202 provided in the box 2 and then fixing the mounting screw S1 with a nut (not shown).

[0036] The second mounting member 97 is a member for mounting the multiple branch breakers 92, the multiple current measuring devices, and the three conductive bars to the box 2. As shown in FIG. 3 , the second mounting member 97 is an I-shaped rod that is bridged between the upper and lower edges of the main opening 201 of the box 2. Like the first mounting member 96, the second mounting member 97 is mounted to the box 2 using, for example, a mounting screw S1. More specifically, the second mounting member 97 is mounted to the box 2 by inserting the mounting screw S1 attached to the second mounting member 97 into a screw insertion hole 202 provided in the box 2 and then fixing the mounting screw S1 with a nut (not shown).

[0037] (1.4) Box Details The box 2 will be described in detail below with reference to FIGS.

[0038] As described above, the box 2 is made of synthetic resin and has a rectangular box shape with an open front.

[0039] 4 and 5, the box 2 includes a bottom wall portion 21 and a peripheral wall portion 22. The bottom wall portion 21 and the peripheral wall portion 22 are integrally formed.

[0040] The bottom wall 21 is attached to the wall A1 with its rear surface facing the wall A1. The bottom wall 21 has a rectangular plate-like outer periphery when viewed from the front. The outer periphery of the bottom wall 21 is a rectangle that is longer in the left-right direction than in the up-down direction.

[0041] As described above, the main opening 201 is formed in the bottom wall portion 21. The main opening 201 has a rectangular shape that is longer in the left-right direction than in the up-down direction. The main opening 201 is formed in the center of the bottom wall portion 21. When viewed from the front, (the area of) the main opening 201 occupies more than half of (the area of) the rectangular region defined by the outer periphery of the bottom wall portion 21, and in this embodiment, occupies more than 3 / 4, more specifically more than 7 / 8. The main opening 201 can be used to pass electrical wires connected to the internal unit 9 of the distribution board 10.

[0042] As described above, a plurality of screw insertion holes 202 are provided above and below the main opening 201 in the bottom wall portion 21. The plurality of screw insertion holes 202 are used to attach the first mounting member 96 and the second mounting member 97 to the box 2. In addition, hollow cylindrical protrusions for inserting screws S2 (see FIG. 3) are provided at the four corners of the bottom wall portion 21 so as to protrude forward.

[0043] The peripheral wall portion 22 has a rectangular frame shape and extends forward from the entire outer periphery of the bottom wall portion 21.

[0044] Specifically, the peripheral wall portion 22 has an upper wall portion 221, a lower wall portion 222, a right side wall portion 223, and a left side wall portion 224. The upper wall portion 221 is formed along the upper edge of the bottom wall portion 21 and extends forward from the upper edge of the bottom wall portion 21. The lower wall portion 222 is formed along the lower edge of the bottom wall portion 21 and extends forward from the lower edge of the bottom wall portion 21. The right side wall portion 223 is formed along the right edge of the bottom wall portion 21 and extends forward from the right edge of the bottom wall portion 21. The left side wall portion 224 is formed along the left edge of the bottom wall portion 21 and extends forward from the left edge of the bottom wall portion 21. Note that, for convenience of explanation, the upper wall portion 221, the lower wall portion 222, the right side wall portion 223, and the left side wall portion 224 may be referred to as the "side wall portion 220" below when no distinction is made between them. The side wall portion 220 is plate-shaped and extends forward from the bottom wall portion 21 .

[0045] As shown in FIGS. 4 to 6, the side wall portion 220 is plate-shaped and extends forward from the bottom wall portion 21. As shown in FIGS. 4 to 7, the side wall portion 220 integrally includes an inclined portion 227, a connecting portion 228, and a wall portion 229. The inclined portion 227 extends from the outer periphery of the bottom wall portion 21 so as to be inclined outward as it extends forward. The connecting portion 228 extends outward from the front end of the inclined portion 227. The wall portion 229 extends forward from the connecting portion 228.

[0046] 4 and 5, a portion of the wall portion 229 has a double-wall structure including an inner wall, an outer wall, and a vertical wall connecting the inner wall and the outer wall. The double-wall structure of the wall portion 229 improves the strength of the box 2.

[0047] As shown in FIGS. 4 to 7, each side wall 220 has an opening 231 penetrating the side wall 220 in the thickness direction. This opening 231 can be used to pass electric wires connected to the internal unit 9 of the distribution board 10. That is, each side wall 220 is provided with (at least a part of) a wire inlet 23 for passing the electric wires. As shown in FIG. 6, the opening 231 has a rectangular shape, and more specifically, an isosceles trapezoid shape with the rear side longer than the front side. The size of the wire inlet 23 is large enough to pass the electric wires through.

[0048] The opening 231 is provided only in the inclined portion 227 of the side wall portion 220. In this embodiment, there are no through holes in the connecting portion 228 and the wall portion 229. In this way, the opening 231 is provided only in the inclined portion 227, thereby improving the strength of the box 2.

[0049] Each side wall portion 220 is provided with two or more, more specifically, three or more wire inlets 23 (openings 231). Specifically, as shown in Figs. 4 and 5, eight wire inlets 23 are provided in each of the upper wall portion 221 and the lower wall portion 222. Six wire inlets 23 are provided in each of the right wall portion 223 and the left wall portion 224. Therefore, a total of 28 wire inlets 23 are provided in the peripheral wall portion 22. In each side wall portion 220, the three or more wire inlets 23 are arranged at equal intervals.

[0050] As shown in Figures 4, 5, and 7, a notch 232 that is connected to the opening 231 and recessed in a direction away from the side wall 220 is formed in the bottom wall 21 at a portion adjacent to the opening 231 of the side wall 220. The notch 232 penetrates the bottom wall 21 in the front-to-rear direction. This notch 232 also constitutes a part of the wire inlet 23. That is, the wire inlet 23 in this embodiment is constituted by the opening 231 of the side wall 220 and the notch 232 of the bottom wall 21, and is formed across the side wall 220 and the bottom wall 21. However, this is not limiting, and the wire inlet 23 may be constituted only by the opening 231 of the side wall 220 (that is, the notch 232 may not be formed in the bottom wall 21).

[0051] 4 to 7, the box 2 further includes a cover portion 24. The cover portion 24 is plate-shaped. The cover portion 24 is coupled to the side wall portion 220 so as to close at least a portion of the wire inlet 23 when viewed along the thickness direction of the side wall portion 220.

[0052] The box 2 is provided with a plurality of cover parts 24. The number (28) of cover parts 24 provided in the box 2 matches the number (28) of wire inlets 23 provided in the peripheral wall part 22. The plurality of cover parts 24 correspond one-to-one to the plurality of wire inlets 23 provided in the peripheral wall part 22.

[0053] Slits 240 are formed in the cover portion 24. The slits 240 penetrate the cover portion 24 in the thickness direction of the cover portion 24. A plurality of slits 240 are formed in the cover portion 24. Each cover portion 24 has one slit 240 formed on the front side and two slits 240 formed on the rear side. The cover portion 24 is in the shape of an M-shape plate when viewed along the thickness direction of the cover portion 24.

[0054] 4 to 6, the cover portion 24 is joined to the periphery of the opening 231 in the side wall portion 220 by two first joining portions 241. As shown in Fig. 7, the cover portion 24 is joined to the periphery of the opening 231 in the side wall portion 220 so that the outer surface of the cover portion 24 is located more inward than the outer surface of the side wall portion 220 and the inner surface of the cover portion 24 is located more inward than the inner surface of the side wall portion 220. Here, the cover portion 24 is joined to the periphery of the opening 231 in the side wall portion 220 so that the outer surface of the cover portion 24 is located at the same position as the inner surface of the side wall portion 220. The first joining portions 241 are formed so that they can be cut with a tool such as nippers.

[0055] 6 and 7, when the cover portion 24 is connected to the peripheral wall portion 22 by the first connecting portion 241, a gap 25 is formed between the cover portion 24 and the peripheral edge of the opening 231 (wire inlet 23) in the side wall portion 220. Also, as described above, the cover portion 24 has a slit 240. In this way, the box 2 has the ventilation holes 29 (slits 240 and gaps 25) penetrating the side wall portion 220 even when the cover portion 24 is connected to the side wall portion 220. This improves ventilation and helps to suppress a rise in temperature inside the cabinet 1.

[0056] In particular, the peripheral wall portion 22 is provided with a plurality of openings 231 (wire inlets 23), thereby providing the peripheral wall portion 22 with a plurality of ventilation holes 29 corresponding to the plurality of wire inlets 23. Providing the peripheral wall portion 22 with a plurality of ventilation holes 29 improves ventilation, thereby further suppressing a rise in temperature inside the cabinet 1. From the viewpoint of improving ventilation, it is preferable that the ventilation holes 29 are provided in two or more side wall portions 220, and it is preferable that the ventilation holes 29 be provided in all (four) side wall portions 220.

[0057] 4, 5, and 7, the cover portion 24 is joined to the peripheral edge of the notch 232 in the bottom wall portion 21 by two second joining portions 242. The second joining portions 242 are formed so as to be cut by a tool such as nippers.

[0058] 4, 5, and 7, when the cover portion 24 is connected to the bottom wall portion 21 by the second connecting portion 242, a gap 26 is formed between the cover portion 24 and the peripheral edge of the notch 232 in the bottom wall portion 21. This improves ventilation and further suppresses the temperature rise inside the cabinet 1.

[0059] When installing the distribution board 10, an installer removes an appropriate cover portion 24 from the plurality of (28) cover portions 24 provided on the box 2. The cover portion 24 is removed from the box 2 by cutting the first connecting portion 241 and the second connecting portion 242 with, for example, nippers or the like.

[0060] 8 to 10 show a first usage example of the box 2. In the first usage example, five of the eight cover parts 24 on the upper wall part 221 (the second, third, fifth, sixth, and seventh cover parts 24 from the left), two of the six cover parts 24 on the right wall part 223 (the two middle cover parts), and two of the six cover parts 24 on the left wall part 224 (the two middle cover parts) have been removed.

[0061] 11 shows a second example of use of the box 2. In the second example of use, five of the eight cover parts 24 on the upper wall part 221 (the second, third, fifth, sixth and seventh cover parts 24 from the left) have been removed.

[0062] In this way, by removing an appropriate cover portion 24 from among the plurality of cover portions 24, it becomes possible to pass electric wires from the outside to the inside of the box 2 through the wire inlet 23 from which the cover portion 24 has been removed.

[0063] For example, in a first usage example (see FIGS. 8 to 10 ), in addition to the main opening 201 of the box 2, electric wires can be led into the box 2 via the five wire inlets 23 in the upper wall 221 of the box 2, the two wire inlets 23 in the right wall 223, and the two wire inlets 23 in the left wall 224. Therefore, when the distribution board 10 is attached to the wall A1 in close contact with the ceiling of the facility, electric wires extending from the ceiling side can be led into the box 2 through the wire inlets 23 in the upper wall 221. Furthermore, when the distribution board 10 is attached to the wall A1 in close contact with the wall surface of the facility, electric wires extending from the wall side can be led into the box 2 through the wire inlets 23 in the right wall 223. In addition, when the distribution board 10 is attached to the wall A1 with its left side in close contact with the wall of the facility, the electric wires extending from the wall side can be pulled into the box 2 through the wire inlet 23 in the left wall portion 224.

[0064] Similarly, in a second usage example (see FIG. 11 ), in addition to the main opening 201 of the box 2, electric wires can be drawn into the box 2 via the five wire inlets 23 on the upper wall 221 of the box 2. Therefore, when the distribution board 10 is attached to the wall A1 in close contact with the ceiling of the facility, electric wires extending from the ceiling side can be drawn into the box 2 through the wire inlets 23 on the upper wall 221.

[0065] The cover parts 24 that are removed when using the distribution board 10 are not limited to those in the first and second usage examples, and any cover parts 24 may be removed. Of course, the distribution board 10 may be attached to the wall A1 and used with all (28) cover parts 24 remaining.

[0066] In this way, by providing the wire inlet 23 on the side wall portion 220, when the distribution board 10 is attached to the wall A1 with the side wall portion 220 in close contact with one surface (ceiling or wall) of the building, it is possible to lead the electric wires extending from this surface into the box 2 through the wire inlet 23. This makes the connection work easier during construction.

[0067] Furthermore, by providing two or more inlets 23 on one side wall portion 220, the installer can select the inlet 23 through which the electric wire should be passed from two or more inlets 23, which further simplifies the connection work during installation. Furthermore, by arranging three or more inlets 23 at equal intervals, the aesthetic appearance of the distribution board 10 is improved.

[0068] Furthermore, since multiple inlets 23 are provided symmetrically around the entire periphery of the peripheral wall portion 22, even if the distribution board 10 is placed against any face of the building, it is possible to lead electric wires into the box 2 through the inlets 23 that are in close contact with the face of the building. This makes connection work easier during construction and increases the flexibility in installing the distribution board 10. It also makes it easier to manufacture the box 2 and improves the aesthetic appearance of the distribution board 10.

[0069] In particular, at least one of the multiple inlets 23 is disposed on each of the upper wall 221, the lower wall 222, the right side wall 223, and the left side wall 224, so that it is possible to pull electric wires into the box 2 through the inlet 23 of any side wall 220 that is in close contact with the face of the building. This makes connection work easier during construction and also improves the flexibility of installation of the distribution board 10.

[0070] Furthermore, for wire inlets 23 through which no electric wires are to be passed, leaving the cover portions 24 in place makes it possible to prevent foreign matter from entering the box 2. This also improves the aesthetic appearance of the distribution board 10.

[0071] As shown in Figures 4, 5 and 7, the box 2 further has reinforcing ribs 27. The reinforcing ribs 27 are provided on the inner surface of the side wall portion 220. The reinforcing ribs 27 extend in the front-to-rear direction. The reinforcing ribs 27 are provided across the inclined portion 227 and the wall portion 229. In this embodiment, two reinforcing ribs 27 are provided for one wire inlet 23 (opening 231). The two reinforcing ribs 27 are arranged on both sides of the corresponding wire inlet 23 in the longitudinal direction of the side wall portion 220 (so as to sandwich the wire inlet 23 therebetween). The provision of the reinforcing ribs 27 improves the strength of the box 2.

[0072] The box 2 also has additional reinforcing ribs other than the reinforcing ribs 27 provided to sandwich the wire inlet 23. In this embodiment, the box 2 has a total of eight additional reinforcing ribs at the four corners of the peripheral wall portion 22. This further improves the strength of the box 2.

[0073] (2) Variations The above embodiment is merely one of various embodiments of the present disclosure. The above embodiment can be modified in various ways depending on the design, etc., as long as the object of the present disclosure can be achieved. Modifications of the embodiment are listed below. The above embodiment and the modifications described below can be applied in appropriate combination.

[0074] In one modified example, the shape of the inlet 23 is not limited to a rectangle, but may be any shape such as a circle, an ellipse, or a polygon.

[0075] In one modified example, the internal unit 9 may further include a grid breaker. The grid breaker is arranged, for example, in place of some (for example, two or three) of the plurality (23) of branch breakers 92 within the cabinet 1. The grid breaker is connected, for example, to an external distributed power source via an electric wire. The electric wire connected to the grid breaker may be drawn into the box 2 via the main opening 201 or may be drawn into the box 2 via the line inlet 23.

[0076] In one modification, the internal unit 9 may further include a measurement adapter. The measurement adapter is placed in an appropriate space within the cabinet 1. The measurement adapter has a measurement function for measuring the power passing through at least one of the main breaker 91 and the branch breakers 92 within the distribution board 10, and a communication function for communicating with devices placed outside the cabinet 1.

[0077] In one modification, the internal unit 9 may further include a backup power supply. The backup power supply is arranged in an appropriate space within the cabinet 1. The backup power supply includes a charging circuit and a battery. The charging circuit receives power from the primary side of the main breaker 91 and charges the battery.

[0078] (3) Mode As can be seen from the above embodiments and modifications, the present specification discloses the following aspects.

[0079] The distribution board box (2) of the first embodiment constitutes a part of the cabinet (1) of the distribution board (10). The distribution board box (2) is attached to a wall (A1) of a facility. The distribution board box (2) includes a bottom wall portion (21) and a side wall portion (220). The bottom wall portion (21) is attached to the wall (A1) with its rear side facing the wall (A1). The side wall portion (220) is plate-shaped and extends forward from the bottom wall portion (21). The side wall portion (220) is provided with a wire inlet (23) for passing an electric wire connected to the internal unit (9) of the distribution board (10).

[0080] According to this embodiment, the connection work can be easily performed when installing the distribution board (10).

[0081] The distribution board box (2) of the second aspect is the same as the first aspect, but further includes a cover portion (24). The cover portion (24) is coupled to the side wall portion (220) so as to close at least a portion of the line inlet (23) when viewed along the thickness direction of the side wall portion (220).

[0082] According to this aspect, it is possible to prevent foreign matter from entering the distribution board box (2).

[0083] In the distribution board box (2) of the third embodiment, in the second embodiment, the side wall portion (220) has an air hole (29) penetrating the side wall portion (220).

[0084] According to this embodiment, the ventilation of the distribution board box (2) is improved, and the temperature rise inside the cabinet (1) can be suppressed.

[0085] In the fourth embodiment of the distribution board box (2), in the third embodiment, the ventilation hole (29) includes a gap (25) formed between the peripheral edge of the inlet (23) in the side wall portion (220) and the cover portion (24).

[0086] According to this embodiment, the ventilation of the distribution board box (2) is improved, and the temperature rise inside the cabinet (1) can be suppressed.

[0087] In the distribution board box (2) of the fifth aspect, in the third or fourth aspect, the vent hole (29) includes a slit (240) formed in the cover portion (24).

[0088] According to this embodiment, the ventilation of the distribution board box (2) is improved, and the temperature rise inside the cabinet (1) can be suppressed.

[0089] The distribution board box (2) of a sixth aspect is the box of any one of the third to fifth aspects, and includes a frame-shaped peripheral wall (22) extending forward from the entire periphery of the bottom wall (21). The side wall (220) is a part of the peripheral wall (22). The peripheral wall (22) has a plurality of air holes (29) penetrating the peripheral wall (22).

[0090] According to this embodiment, the ventilation of the distribution board box (2) is further improved, and the temperature rise inside the cabinet (1) can be suppressed.

[0091] The distribution board box (2) of a seventh aspect is any one of the first to sixth aspects, and includes a frame-shaped peripheral wall (22) extending forward from the entire periphery of the bottom wall (21). The side wall (220) is a part of the peripheral wall (22). The peripheral wall (22) has a plurality of inlets (23) including the inlet (23) provided in the side wall (220) symmetrically provided around the entire periphery of the peripheral wall (22).

[0092] According to this embodiment, the connection work during construction of the distribution board (10) becomes easier, and the degree of freedom in installing the distribution board (10) is improved.

[0093] In the distribution board box (2) of the eighth aspect, in the seventh aspect, the bottom wall portion (21) has a rectangular plate-like outer periphery. The peripheral wall portion (22) includes an upper wall portion (221), a lower wall portion (222), a right wall portion (223), and a left wall portion (224) extending forward from the upper, lower, right, and left sides of the bottom wall portion (21). At least one of the multiple wire inlets (23) is disposed in each of the upper wall portion (221), the lower wall portion (222), the right wall portion (223), and the left wall portion (224).

[0094] According to this embodiment, the connection work during construction of the distribution board (10) becomes easier, and the degree of freedom in installing the distribution board (10) is improved.

[0095] In the distribution board box (2) of the ninth aspect, in any one of the first to eighth aspects, the side wall portion (220) is provided with two or more wire inlets (23).

[0096] According to this aspect, the installer can select the inlet (23) through which the electric wire should be passed from two or more inlets (23), which further facilitates the connection work during installation.

[0097] In a distribution board box (2) of a tenth aspect, in the ninth aspect, three or more wire inlets (23) are provided in the side wall portion (220). The three or more wire inlets (23) are arranged at equal intervals in the side wall portion (220).

[0098] According to this embodiment, the connection work during installation becomes easier and the appearance of the distribution board (10) is improved.

[0099] In the distribution board box (2) of the eleventh aspect, in any one of the first to tenth aspects, the line inlet (23) has an isosceles trapezoidal shape with a rear side longer than a front side when viewed from the side.

[0100] According to this aspect, it is easier to pass an electric wire having a circular cross section through the wire inlet (23) than when the wire inlet is circular, for example, and connection work during installation is further facilitated.

[0101] The distribution board (10) of the twelfth aspect includes the distribution board box (2) of any one of the first to eleventh aspects, and breakers (main breaker 91, branch breaker 92, interconnection breaker) as internal units (9).

[0102] According to this embodiment, the connection work during installation of the distribution board (10) becomes easier. [Explanation of symbols]

[0103] 10 Distribution board 1 cabinet 2 Distribution box (box) 21 Bottom wall 22 Peripheral wall section 220 Side wall 221 Upper wall 222 Lower wall section 223 Right side wall 224 Left side wall 23 Entrance 24 Cover part 240 slit 25 Gap 29 Ventilation holes 9 Internal unit A1 Wall

Claims

1. A distribution box that forms part of a distribution cabinet and is attached to the wall of a facility, a bottom wall portion attached to the wall with its rear surface facing the wall; a plate-shaped side wall portion extending forward from the bottom wall portion, The side wall portion is provided with a wire inlet for passing an electric wire connected to an internal unit of the distribution board. Distribution board box.

2. The cable further includes a cover portion coupled to the side wall portion so as to close at least a portion of the wire inlet when viewed along the thickness direction of the side wall portion. The distribution board box according to claim 1.

3. The side wall portion has a ventilation hole penetrating the side wall portion. The distribution board box according to claim 2.

4. The ventilation hole includes a gap formed between the peripheral edge of the wire inlet in the side wall portion and the cover portion. The distribution board box according to claim 3.

5. The ventilation hole includes a slit formed in the cover portion. The distribution board box according to claim 3.

6. The distribution board box includes a frame-shaped peripheral wall portion extending forward from the entire periphery of the bottom wall portion, and the side wall portion is a part of the peripheral wall portion, The peripheral wall portion has a plurality of ventilation holes penetrating the peripheral wall portion. The distribution board box according to claim 3.

7. The distribution board box includes a frame-shaped peripheral wall portion extending forward from the entire periphery of the bottom wall portion, and the side wall portion is a part of the peripheral wall portion, The peripheral wall portion has a plurality of wire inlets, including the wire inlet provided in the side wall portion, provided symmetrically around the entire periphery of the peripheral wall portion. The distribution board box according to claim 1.

8. the bottom wall portion has a rectangular plate-like outer periphery, the peripheral wall portion includes an upper wall portion, a lower wall portion, a right side wall portion, and a left side wall portion extending forward from an upper side, a lower side, a right side, and a left side, respectively, of the bottom wall portion; At least one of the plurality of wire inlets is arranged on each of the upper wall portion, the lower wall portion, the right wall portion, and the left wall portion. The distribution board box according to claim 7.

9. The side wall portion is provided with two or more of the wire inlets. The distribution board box according to claim 1.

10. The side wall portion is provided with three or more of the wire inlets, In the side wall portion, the three or more wire inlets are arranged at equal intervals. The distribution board box according to claim 9.

11. The inlet has an isosceles trapezoidal shape with a rear side longer than a front side when viewed from the side. The distribution board box according to claim 1.

12. The distribution board box according to claim 1; and a breaker as the internal unit. Distribution board.

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