Cases and distribution boards

Abstract

To provide a case that can improve heat radiation property while suppressing deterioration of a tracking prevention function.SOLUTION: A case comprises: a trunk breaker 40; a base 10 to which a branch breaker 50 and a terminal bar 30 are fixed; a cover 60 that covers the base 10; and a wall part 20 projecting toward the cover 60 from the base 10. The wall part 20 in turn includes a communication hole 20a providing communication between an upper space and a lower space of the wall part 20, and covers the terminal bar 30 from above with the trunk breaker 40, the branch breaker 50 and the terminal bar 30 being fixed to the base 10.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a case and a distribution board. [Background technology]

[0002] Patent Document 1 discloses a distribution board in which a main body cover (cover) can be attached to and detached from a base. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-189638 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, a distribution board has conductive parts called terminal bars arranged inside. The conductive parts are covered with an insulating cover to prevent electric shock, etc. The insulating cover does not have holes formed to prevent tracking caused by the accumulation of dust and the like on the conductive parts, making it difficult to effectively dissipate heat from the conductive parts. Furthermore, forming holes penetrating the insulating cover to improve heat dissipation reduces the tracking prevention function. Furthermore, Patent Document 1 does not disclose a technology for improving heat dissipation while suppressing a decrease in the tracking prevention function. In other words, with conventional technology, it is difficult to improve heat dissipation while suppressing a decrease in the tracking prevention function.

[0005] Therefore, the present invention provides a case and a distribution board that can improve heat dissipation while suppressing a decrease in the tracking prevention function. [Means for solving the problem]

[0006] A case according to one aspect of the present invention comprises a base to which a main breaker, branch breakers and conductive parts are fixed, a cover that covers the base, and a wall portion that protrudes from the base toward the cover, the wall portion having a communication hole that connects the spaces above and below the wall portion, and covering the conductive parts from above when the main breaker, branch breakers and conductive parts are fixed to the base.

[0007] A distribution board according to one aspect of the present invention includes the above-described case, a main breaker, branch breakers, and a conductive portion fixed to the case. [Effects of the Invention]

[0008] According to one aspect of the present invention, it is possible to realize a case and a distribution board that can improve heat dissipation while suppressing deterioration of the tracking prevention function. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view showing the appearance of a distribution board according to an embodiment. [Figure 2] FIG. 2 is an exploded perspective view showing the configuration of the distribution board according to the embodiment. [Figure 3] 3 is a cross-sectional view showing the wall portion taken along line III-III shown in FIG. [Figure 4] FIG. 4 is an exploded perspective view showing the configuration of a distribution board according to a modified example of the embodiment. [Figure 5] FIG. 5 is an enlarged perspective view of a wall portion according to a modification of the embodiment. [Figure 6] 6 is a cross-sectional perspective view showing the wall portion when cut along the line VI-VI shown in FIG. [Figure 7] 7 is a cross-sectional view showing a distribution board according to a modified example of the embodiment when cut along a cutting line corresponding to line VII-VII shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, the embodiments will be specifically described with reference to the drawings.

[0011] The embodiments and the like described below are all comprehensive or specific examples. The numerical values, shapes, components, component placement positions, and connection configurations shown in the following embodiments and the like are merely examples and are not intended to limit the present invention. Furthermore, among the components in the following embodiments, components that are not recited in independent claims are described as optional components.

[0012] Furthermore, each figure is a schematic diagram and is not necessarily an exact illustration. Therefore, for example, the scales and the like do not necessarily match in each figure. Furthermore, in each figure, substantially the same configurations are assigned the same reference numerals, and duplicate explanations are omitted or simplified.

[0013] In this specification and drawings, the X-axis, Y-axis, and Z-axis represent the three axes of a three-dimensional Cartesian coordinate system. In the embodiments, the X-axis direction is the thickness direction of the distribution board (the stacking direction of the components). In this specification, a "front view" means viewing the distribution board along the X-axis direction (the thickness direction of the distribution board), and a "plan view" means viewing the distribution board along the Z-axis direction. The Y-axis direction is the left-right direction (e.g., horizontal direction) when the distribution board is attached to a construction material, the Z-axis direction is the up-down direction (e.g., vertical direction) when the distribution board is attached to a construction material, and the X-axis direction is the front-to-back direction when the distribution board is attached to a construction material, but this is not limiting.

[0014] Furthermore, in this specification, terms indicating the relationship between elements, such as parallel and the same, terms indicating the shape of elements, such as rectangle and trapezoid, as well as numerical values ​​and numerical ranges, are not expressions that express only the strict meaning, but are expressions that also include a substantially equivalent range, for example, a difference of about a few percent (e.g., about 10%).

[0015] (Embodiment) [1. Distribution board configuration] The configuration of a distribution board according to the present embodiment will be described with reference to Figures 1 to 3. Figure 1 is a perspective view showing the appearance of a distribution board 1 according to the present embodiment. Figure 2 is an exploded perspective view showing the configuration of the distribution board 1 according to the present embodiment.

[0016] The distribution board 1 receives a supply of electric power (system power) from a power system, which is a facility of an electric power company or the like, and branches the power into a plurality of branch circuits. The distribution board 1 is installed inside a facility that uses electric power, such as a home, a hospital, a factory, or a building.

[0017] As shown in FIGS. 1 and 2, the distribution board 1 includes a base 10, a terminal bar 30, a holding member 31, a main breaker 40, branch breakers 50, a cover 60, and a door 70. The base 10 and the cover 60 form a case (distribution board box) for the distribution board 1. The terminal bar 30, the holding member 31, the main breaker 40, and the branch breakers 50 are housed within the case. In this embodiment, the case is box-shaped and can house the terminal bar 30, the holding member 31, the main breaker 40, and the branch breakers 50 inside.

[0018] The base 10 is a plate-like member to which the terminal bar 30, the holding member 31, the main breaker 40, and the branch breakers 50 are fixed. The shape of the base 10 in a front view is, for example, rectangular.

[0019] The base 10 is attached to a construction material. For example, the base 10 is attached directly to the construction material. For example, the base 10 may be attached in contact with a wall (e.g., plasterboard). The base 10 has an attachment portion 10a and a wall portion 20.

[0020] The mounting portion 10a is a portion for detachably mounting the holding member 31 that holds the terminal bar 30. The mounting portion 10a is configured, for example, with an opening to which the holding member 31 is attached (e.g., hooked), a protrusion that engages with the holding member 31, etc. The mounting portion 10a may also be, for example, a crank-shaped rail. The mounting portion 10a may also be, for example, a din rail.

[0021] Here, being detachable means that the holding member 31 that holds the terminal bar 30 can be attached to and detached from the mounting portion 10a without using fastening members such as screws. The mounting portion 10a may have a configuration that allows an internal unit that integrates the terminal bar 30, the holding member 31, the main breaker 40, and the branch breaker 50 to be detachably attached.

[0022] The wall portion 20 is a plate-like member disposed above the terminal bar 30 to prevent electric shock from the conductive terminal bar 30 and to prevent tracking due to accumulation of dust and the like on the terminal bar 30. The wall portion 20 protrudes from the base 10 toward the cover 60 (the positive direction of the X-axis). The wall portion 20 is provided, for example, upright on the base 10. When the terminal bar 30, the main breaker 40, and the branch breakers 50 are fixed to the base 10, the wall portion 20 covers the terminal bar 30 from above (the positive side of the Z-axis). The wall portion 20 is disposed above the mounting portion 10a, and in this embodiment, is disposed on the positive side of the Y-axis and the positive side of the Z-axis of the base 10. The wall portion 20 is formed, for example, integrally with the base 10. This reduces the number of parts in the distribution board 1 and eliminates the installation work required when the wall portion 20 is separate from the base 10, thereby reducing the cost of the distribution board 1. The wall portion 20 may be a separate member from the base 10. In other words, the wall portion 20 may be detachably attached to the base 10.

[0023] The wall portion 20 is elongated in the Y-axis direction, for example. The length L1 of the wall portion 20 in the X-axis direction is equal to or greater than the length L2 of the terminal bar 30 in the X-axis direction, for example. For example, in a plan view (here, when the terminal bar 30 is viewed from the wall portion 20 side) in which the terminal bar 30, main breaker 40, and branch breakers 50 are fixed, the terminal bar 30 is hidden by the wall portion 20 and is not visible. This effectively prevents dust and the like from accumulating on the terminal bar 30. The cross-sectional shape of the wall portion 20 will be described later with reference to FIG. 3.

[0024] The base 10 and the wall 20 are formed, for example, from a material having electrical insulation (insulating properties). For example, the base 10 and the wall 20 are integrally formed from resin. The base 10 and the wall 20 are, for example, molded products (e.g., resin molded products). The resin forming the base 10 and the wall 20 may be the same as the resin forming the cover 60. The resin is exemplified by, for example, polyethylene resin, but is not limited to this, and other resins may also be used. At least a portion of the base 10 may be formed from metal.

[0025] The base 10 is also formed with an opening through which the power lines connected to the main breaker 40 are inserted, and an opening through which the power lines connected to the branch breakers 50 are inserted.

[0026] The terminal bar 30 is a plate-shaped conductive member for connecting the main breaker 40 and the branch breakers 50. The distribution board 1 is connected to a commercial power source, and is configured so that the commercial power source supplies power to each branch breaker 50 via the main breaker 40 and the terminal bar 30.

[0027] The terminal bar 30 is made of a conductive material such as copper. The terminal bar 30 is not covered with an insulating material, and the conductive portion is exposed. This is why the wall portion 20 is provided. The terminal bar 30 is also called a bus bar or a conductive bar. The terminal bar 30 is an example of a conductive portion.

[0028] For example, no other members are disposed between the terminal bar 30 and the wall portion 20.

[0029] The holding member 31 is an elongated member that holds the terminal bar 30. The holding member 31 is fixed to the mounting portion 10a of the base 10 while holding the terminal bar 30. The holding member 31 is made of, for example, an insulating material. The holding member 31 may also be made of resin.

[0030] The main breaker 40 is a breaker that stops the supply of power from the power system when a current exceeding a predetermined current (for example, a current based on the power specified in a contract with the power company) flows from the power system.

[0031] The branch breaker 50 is a breaker provided in each power line (branch circuit) connected to the distribution board 1. A plurality of branch breakers 50 are provided. When an overcurrent flows in a power line connected to the branch breaker 50, the branch breaker 50 stops the supply of power to the power line.

[0032] The distribution board 1 only needs to include at least one of the main breaker 40 and the branch breakers 50. In this case, the at least one of the main breaker 40 and the branch breakers 50 is attached to the base 10.

[0033] The cover 60 is a member that covers the base 10. The cover 60 has a front panel, a top panel formed to surround the periphery of the front panel, a pair of side panels, and a bottom panel.

[0034] The door 70 is rotatably attached to the front panel of the cover 60 and opens and closes an opening formed in the front panel of the cover 60. The door 70 covers the opening and is attached to the cover 60 rotatably with the Y-axis direction as its axis of rotation. The operation parts (e.g., handles) of the main breaker 40 and the branch breakers 50 are located in the opening. That is, the door 70 covers the operation parts of the main breaker 40 and the branch breakers 50. Opening and closing the door 70 switches between an open state in which the operation parts of the main breaker 40 and the branch breakers 50 are exposed, and a closed state in which the operation parts are not exposed. The door 70 may also cover a display unit that shows the status of the main breaker 40 and the branch breakers 50. The door 70 has, for example, a rectangular shape when viewed from the front, but is not limited to this.

[0035] In this embodiment, the door 70 is a downward-opening door. In other words, the door 70 is attached to the cover 60 so as to be able to open downward. The door 70 may be attached to the cover 60 by a rod-shaped member such as a pin extending in the Y-axis direction, for example.

[0036] The cover 60 and the door 70 are insulating. The cover 60 and the door 70 may be made of the same material. The cover 60 and the door 70 are made of, for example, resin. For example, the door 70 may be a molded product (e.g., a resin molded product). The resin may be, for example, polyethylene resin, but is not limited to this, and other resins may also be used.

[0037] The cross-sectional shape of the wall portion 20 will now be described with reference to Fig. 3. Fig. 3 is a cross-sectional view showing the wall portion 20 taken along line III-III shown in Fig. 2.

[0038] As shown in Fig. 3, the wall 20 has flat plate-like members 21 to 25. The plate-like members 21 to 25 are provided extending in the X-axis direction, and, for example, their ends on the negative side of the X-axis are connected to the base 10. The cross-sectional shape of the plate-like members 21 to 25 is, for example, rectangular. The description will be given assuming that the width of each of the plate-like members 21 to 25 is, for example, the width W (length in the Y-axis direction), and that they are all equal, but this is not limiting. The number of plate-like members included in the wall 20 is not particularly limited.

[0039] Plate-like members 21 to 23 are arranged at a predetermined interval P along the Y-axis direction. The predetermined interval P is, for example, smaller than the width W of plate-like members 24 and 25. Furthermore, plate-like member 22 is arranged so as to cover the space between plate-like members 24 and 25 from above. Plate-like member 22 is arranged so as to partially overlap the opposing ends of plate-like members 24 and 25 in a plan view.

[0040] Plate-like members 24 and 25 are arranged along the Y-axis direction at a predetermined interval on the negative side of the Z-axis direction from plate-like members 21 to 23. The interval at which plate-like members 24 and 25 are arranged may be, for example, interval P.

[0041] Plate-shaped member 24 is arranged to cover the space between plate-shaped members 21 and 22 from below. Width W of plate-shaped member 24 is greater than distance P between plate-shaped members 21 and 22. Plate-shaped member 24 is also arranged to partially overlap the opposing ends of plate-shaped members 21 and 22 in a plan view. This prevents terminal bar 30 from being visible between plate-shaped members 21 and 22 in a plan view, thereby preventing dust and the like from accumulating on terminal bar 30.

[0042] Plate-shaped member 25 is arranged to cover the space between plate-shaped members 22 and 23 from below. Width W of plate-shaped member 25 is greater than distance P between plate-shaped members 22 and 23. Plate-shaped member 25 is also arranged to partially overlap the opposing ends of plate-shaped members 22 and 23 in a plan view. This prevents terminal bar 30 from being visible between plate-shaped members 22 and 23 in a plan view, thereby preventing dust and the like from accumulating on terminal bar 30.

[0043] Furthermore, the plate-like members 21 to 25 are arranged in a zigzag pattern along the longitudinal direction (Y-axis direction) of the terminal bar 30 when viewed from the front. That is, the plate-like members 21 to 25 are arranged such that the plate-like members 21 to 23 arranged on the positive side of the Z axis and the plate-like members 24 and 25 arranged on the negative side of the Z axis are arranged alternately. Note that the zigzag arrangement means that when the centers of the plate-like members 21 to 25 are connected in order along the Y-axis direction when viewed from the front, the straight lines form a zigzag pattern. It can also be said that the plate-like members 21 to 25 are arranged at each vertex of the zigzag pattern.

[0044] The direction in which plate-like members 21 to 23 are arranged is, for example, parallel to the direction in which plate-like members 24 and 25 are arranged. No through-holes that penetrate in the Z-axis direction are formed in plate-like members 21 to 25. Plate-like members 21 to 25 are spaced apart from each other and do not abut on each other.

[0045] In the wall 20 configured in this manner, the opening on one side of the communication hole 20a is formed by the spaces between the plate-like members 21 and 22 and between the plate-like members 22 and 23, and the opening on the other side of the communication hole 20a is formed by the space between the plate-like members 24 and 25. The communication hole 20a is a hole that connects the opening on one side with the opening on the other side, and connects the space above the wall 20 with the space below it. The space above the wall 20 is the space on the positive side of the Z axis from the plate-like members 21 to 23. The space below the wall 20 is the space on the negative side of the Z axis from the plate-like members 24 and 25, specifically the space between the wall 20 and the terminal bar 30.

[0046] Furthermore, by arranging plate-like members 21 to 25 as described above, a flow path is formed in which air flows from the space below wall portion 20 to the space above wall portion 20 via the space between plate-like members 24 and 25 and the space between plate-like members 21 and 22, and a flow path is formed in which air flows from the space below wall portion 20 to the space above wall portion 20 via the space between plate-like members 24 and 25 and the space between plate-like members 22 and 23. The flow paths are curved rather than linear.

[0047] This allows the space below the wall portion 20 to communicate with the space above the wall portion 20, thereby preventing the wall portion 20 from interfering with the flow of air from below to above the wall portion 20. Heat generated in the terminal bar 30 is dissipated to the space above the wall portion 20 through the communication holes 20a, preventing the temperature of the terminal bar 30 from rising.

[0048] Although the above description has been given of an example in which plate-like members 21 to 25 are arranged parallel to the X-axis direction, they may also be arranged so as to be inclined with respect to the X-axis. Furthermore, the arrangement intervals between plate-like members 21 to 25 may be the same or different. For example, the interval between plate-like members 21 and 22 and the interval between plate-like members 22 and 23 may be the same or different.

[0049] Although the wall portion 20 has been described as having plate-like members 21 to 25 each having a rectangular cross-sectional shape, the cross-sectional shape of the plate-like members 21 to 25 is not limited to a rectangular shape, and may be polygonal, elliptical, wavy, or the like.

[0050] The distance between the plate-like members 21 to 23 and the plate-like members 24 and 25 in the Z-axis direction is not particularly limited as long as it is a distance that allows air to flow.

[0051] [2. Effects etc.] As described above, the case according to this embodiment includes the base 10 to which the main breaker 40, the branch breakers 50, and the terminal bar 30 (an example of a conductive part) are fixed, the cover 60 that covers the base 10, and the wall portion 20 that protrudes from the base 10 toward the cover 60 (toward the positive side of the X-axis). The wall portion 20 has communication holes 20a that connect the spaces above and below the wall portion 20, and covers the terminal bar 30 from above when the main breaker 40, the branch breakers 50, and the terminal bar 30 are fixed to the base 10.

[0052] As a result, the wall portion 20 covers the terminal bar 30, thereby preventing a decrease in the anti-tracking function. Furthermore, since the wall portion 20 has communication holes 20a, heat generated by the terminal bar 30 can be dissipated through the communication holes 20a. Therefore, the case according to this embodiment can improve heat dissipation for the terminal bar 30 while preventing a decrease in the anti-tracking function.

[0053] Furthermore, when the main breaker 40, branch breaker 50 and terminal bar 30 are fixed to the base 10, the terminal bar 30 cannot be seen when looking from the wall 20 side toward the terminal bar 30 (from the positive side of the Z axis to the negative side of the Z axis).

[0054] This can further prevent the tracking prevention function from being deteriorated, and can also further prevent people from coming into contact with the terminal bar 30.

[0055] The wall portion 20 is made up of a plurality of plate-like members 21 to 25 that protrude from the base 10 toward the cover 60 and are arranged in a zigzag pattern along the terminal bar 30 (along the Y-axis direction).

[0056] This allows heat to be dissipated through the gaps between the multiple plate-like members 21-25, thereby effectively dissipating heat from the terminal bar 30. Furthermore, by arranging the multiple plate-like members 21-25 in a zigzag pattern, it is possible to effectively prevent dust and the like from reaching the terminal bar 30.

[0057] The base 10 and the wall portion 20 are integrally formed.

[0058] This makes it possible to reduce the number of parts in the distribution board 1, and also to omit the installation work required when the wall portion 20 is separate from the base 10, thereby reducing the cost of the distribution board 1.

[0059] The base 10 also has an attachment portion 10a for detachably attaching a holding member 31 for holding the terminal bar 30.

[0060] This makes it easy to assemble the distribution board 1 having the above-described case. For example, after the base 10 alone is fixed to a construction material, the holding member 31 holding the terminal bar 30 can be attached to the base 10. Since the base 10 alone is lighter than the base 10 with the holding member 31 attached, it is possible to suppress a decrease in workability due to the weight of the base 10. It is also expected to have the effect of reducing worker fatigue during construction.

[0061] Also provided is a door 70 that is rotatably attached to the cover 60 and covers the operating sections of the main breaker 40 and the branch breaker 50.

[0062] As a result, in a case equipped with the door 70, it is possible to improve the heat dissipation performance for the terminal bar 30 while suppressing a decrease in the tracking prevention function.

[0063] As described above, the distribution board 1 according to this embodiment includes the above-mentioned case, the main breaker 40, the branch breakers 50, and the terminal bar 30 (an example of a conductive portion) fixed to the case.

[0064] This provides the same effect as in the above case, i.e., it is possible to realize a distribution board 1 that can improve heat dissipation to the terminal bar 30 while suppressing deterioration of the tracking prevention function.

[0065] (Modification of the embodiment) The configuration of the distribution board according to this modification will be described with reference to Figs. 4 to 7. Fig. 4 is an exploded perspective view showing the configuration of the distribution board 100 according to this modification. Fig. 5 is an enlarged perspective view of a wall portion 120 according to this modification. Fig. 6 is a cross-sectional perspective view showing the wall portion 120 when cut along line VI-VI shown in Fig. 5.

[0066] As shown in FIG. 4 , the distribution board 100 according to this modification includes a wall portion 120 instead of the wall portion 20. The remaining configuration of the distribution board 100 is the same as that of the embodiment, and therefore a description thereof will be omitted. The wall portion 120 is integrally formed with the base 10 and protrudes from the base 10 toward the cover 60 (the positive direction of the X-axis). When the terminal bar 30, the main breaker 40, and the branch breakers 50 are fixed to the base 10, the wall portion 120 covers the terminal bar 30 from above (the positive side of the Z-axis). In a plan view (here, when the terminal bar 30 is viewed from the wall portion 120 side) with the terminal bar 30, the main breaker 40, and the branch breakers 50 fixed in place, the terminal bar 30 is hidden by the wall portion 120 and cannot be seen. This prevents dust from accumulating above the wall portion 120 on the terminal bar 30.

[0067] 5 and 6, the wall portion 120 has a plate-shaped portion 120a and a protruding portion 121. Although an example in which the wall portion 120 has two protruding portions 121 is illustrated in Fig. 5 and 6, the number of protruding portions 121 is not particularly limited as long as it is one or more.

[0068] The plate-like portion 120a is connected to the base 10 and is a plate-like member formed in an area where the protrusion portion 121 is not provided in a plan view. The plate-like portion 120a covers a part of the terminal bar 30. A plurality of the plate-like portions 120a are provided along the Y-axis direction, and have, for example, a trapezoidal shape in a plan view (a trapezoidal shape that tapers toward the negative X-axis side).

[0069] The protruding portion 121 is a component for connecting the spaces above and below the wall portion 120, and is provided to protrude upward (toward the positive side of the Z axis) from the plate-shaped portion 120a. The protruding portion 121 has an upper surface portion 122 and three side surface portions 123.

[0070] The top surface portion 122 is a plate-like member disposed on the positive side of the Z axis of the plate-like portion 120a. In this embodiment, the shape of the top surface portion 122 in a plan view is trapezoidal (a trapezoidal shape that tapers toward the positive side of the X axis), but is not limited to this. Note that the trapezoidal shape can reduce the strength of the molding die used to mold the base 10 having the wall portion 120.

[0071] The side surface portion 123 is a plate-like member that protrudes from the plate-like portion 120a toward the top surface portion 122. The end of the side surface portion 123 on the positive side in the Z-axis direction is connected to the top surface portion 122, and the end on the negative side in the Z-axis direction is connected to the plate-like portion 120a. In the wall portion 120 formed in this manner, a space 126 is formed that is surrounded by the top surface portion 122 and the side surface portion 123. The space 126 communicates with the space below the wall portion 120 (i.e., the space between the wall portion 120 and the terminal bar 30).

[0072] Communication holes 124 and 125 are formed in the side surface portion 123. Communication hole 124 is a through hole formed in two of the three side surface portions 123 that are formed on the Y-axis direction side. Communication hole 124 communicates the space above wall portion 120 with space 126. Communication hole 125 is a through hole formed in the side surface portion 123 on the positive side of the X-axis among the three side surface portions 123. Communication hole 125 communicates the space above wall portion 120 with space 126.

[0073] This forms a flow path through which air flows from the space below wall portion 120 to the space above wall portion 120 via space 126 and communication hole 124, and a flow path through which air flows from the space below wall portion 120 to the space above wall portion 120 via space 126 and communication hole 125, so that heat generated in terminal bar 30 is dissipated into the space above wall portion 120 via the two flow paths.

[0074] No through-holes penetrating in the Z-axis direction are formed in the plate-shaped portion 120a and the top surface 122 of the protruding portion 121. In addition, it is sufficient that at least one of the communication holes 124 and 125 is formed in the side surface portion 123.

[0075] Fig. 7 is a cross-sectional view showing the distribution board 100 according to this modified example when cut along a cutting line corresponding to line VII-VII shown in Fig. 1. Fig. 7 shows a cross-sectional view of the state in which each component is housed in a case (base 10 and cover 60).

[0076] 7, the distribution board 100 has a ventilation section 180, which is a gap between the base 10 and the cover 60 when the base 10 and the cover 60 are joined together. The ventilation section 180 is provided above the wall section 120.

[0077] As described above, the wall portion 120 of the case in this modified example has a protrusion portion 121 that protrudes upward (toward the positive Z-axis side) of the wall portion 120, and the communicating holes 124 and 125 are provided on the side surface (side surface portion 123) of the protrusion portion 121.

[0078] This allows heat generated by the terminal bar 30 to be dissipated through the communication holes 124, 125 formed in the side surface portion 123 of the protrusion 121. Furthermore, dust and the like can be prevented from accumulating on the terminal bar 30 compared to, for example, a case in which the communication holes 124, 125 are formed in the top surface portion 122. Therefore, the case can improve heat dissipation while preventing a decrease in the tracking prevention function.

[0079] When the base 10 and the cover 60 are joined together, a ventilation portion 180 is formed as a gap between the base 10 and the cover 60 .

[0080] This allows heat generated in the terminal bar 30 to escape to the outside of the distribution board 100, further improving the heat dissipation performance of the distribution board 100.

[0081] (Other embodiments) Although the embodiments have been described above, the present invention is not limited to the above embodiments.

[0082] For example, in the above-described embodiment, the length of the wall portion in the X-axis direction is equal to or greater than the length of the terminal bar in the X-axis direction, but this is not limiting and the wall portion may be less than the length of the terminal bar in the X-axis direction. In plan view, the wall portion only needs to cover at least a portion of the terminal bar in the X-axis direction.

[0083] In addition, in the above embodiment, an example was described in which the wall portion is formed in a two-stage configuration in the Z-axis direction, with three plate-shaped members (plate-shaped members 21 to 23) formed on the positive side of the Z-axis and two plate-shaped members (plate-shaped members 24 and 25) formed on the negative side of the Z-axis, but the wall portion may have a three-stage or more configuration in the Z-axis direction.

[0084] Furthermore, in the above-described embodiment and the like, an example has been described in which the openings for exposing the main breaker and the branch breakers are formed in the cover, but the openings do not necessarily have to be formed.

[0085] In addition, although the above-described embodiments and the like have been described as examples in which a door is provided on the cover, the present invention is not limited to this, and a door may not be provided. For example, the distribution board may have an exposed operating portion for at least one of the main breaker and the branch breaker.

[0086] Furthermore, in the above-described embodiment and the like, an example has been described in which the wall portion is integrally formed with the base, but this is not limiting, and the wall portion may be detachably attached to the base.

[0087] In addition, the present invention also includes forms obtained by applying various modifications to the embodiments that a person skilled in the art would conceive, or forms realized by arbitrarily combining the components and functions of each embodiment within the scope that does not deviate from the spirit of the present invention. [Explanation of symbols]

[0088] 1, 100 Distribution board 10 base 10a Mounting part 20, 120 wall 20a, 124, 125 communication hole 21, 22, 23, 24, 25 Plate-shaped members 30 Terminal bar (conductive part) 31 Retaining member 40 Main breaker 50 Branch Breaker 60 Cover 70 Doors 121 Protruding part 123 Side part 180 Ventilation section

Claims

1. a base to which the main breaker, the branch breakers, and the conductive part are fixed; a cover that covers the base; a wall portion protruding from the base toward the cover, the wall portion has a communication hole that connects spaces above and below the wall portion, and covers the conductive portion from above in a state in which the main breaker, the branch breakers, and the conductive portion are fixed to the base; The wall portion is made up of a plurality of plate-like members that protrude from the base toward the cover and are arranged in a zigzag pattern along the conductive portion. case.

2. When the main breaker, the branch breaker, and the conductive part are fixed to the base, the conductive part cannot be seen when the conductive part is viewed from the wall side. The case according to claim 1.

3. When the base and the cover are joined together, a vent portion is formed as a gap between the base and the cover.

3. The case according to claim 1 or 2.

4. The base and the wall are integrally formed. The case according to any one of claims 1 to 3.

5. The base has an attachment portion for detachably attaching a holding member for holding the conductive portion. The case according to any one of claims 1 to 4.

6. a door rotatably attached to the cover and covering the operation units of the main breaker and the branch breaker; The case according to any one of claims 1 to 5.

7. A case according to any one of claims 1 to 6, A main breaker, a branch breaker, and a conductive portion are fixed to the case. Distribution board.

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