Electrical equipment storage box

Abstract

To provide an electric apparatus housing box having a waterproof structure that can implement efficient ventilation without deteriorating the waterproof property.SOLUTION: Ventilation holes 4, 4 .. are formed in a door 3 that opens / closes a front surface opening of a box main body 2. An electric apparatus housing box is formed into a box shape with a front surface opened. Further, a cover member 12 having a rear surface portion 12E in which inflow ports 16, 16 .. are formed is set to cover the ventilation holes 4, 4 .. from the inner side of the door 3, and a waterproof plate 11 is mounted on the cover member 12 so as to be located behind the ventilation holes 4, 4 .. in the cover member 12. A gap is formed between the outer peripheral edge of the waterproof plate 11 and the inner surface of the cover member 12.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a box for housing electrical equipment, such as a cabinet for housing electrical equipment. [Background technology]

[0002] Conventionally, in electrical equipment storage boxes used for distribution boards and the like, ventilation openings for ventilating the air inside the box body are sometimes provided on the periphery (front, back, left and right sides) of the box body. However, opening ventilation openings can cause problems such as rain getting in, so a waterproof structure has been devised for the box body.

[0003] For example, in the invention described in Patent Document 1, a hood-shaped waterproof member that opens only on the top surface is attached to cover the ventilation hole opened in the box body from the inside of the box body, and a dust filter is attached inside the opening of the waterproof member to form a waterproof structure. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2004-63598 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the waterproof structure described in Patent Document 1, the waterproof member is only open on the top surface, which means that the flow of air flowing in through the ventilation opening is easily obstructed, making it difficult to ventilate efficiently.

[0006] Therefore, the present invention has been made in consideration of the above problems, and aims to provide a box for storing electrical equipment having a waterproof structure that can achieve efficient ventilation without compromising waterproofing. [Means for solving the problem]

[0007] In order to achieve the above object, the present invention according to claim 1 provides a box for housing electrical equipment, the box having an air vent on at least one of the front, rear, left and right sides, the box being formed in a box shape opening in a predetermined direction, a cover member having an inlet on the side opposite the opening, the cover member being installed on the inside of the side with the opening facing the air vent, and covering the air vent, and a waterproof board being attached to the inside of the air vent inside the cover member. The waterproof board is provided with a bulging portion that bulges toward the air hole side, and the waterproof board is tapered from the outer periphery toward the bulging portion. Further, a gap is formed between the outer peripheral edge of the waterproof board and the inner surface of the cover member. In addition, in order to achieve the above-mentioned object, the invention described in claim 2 of the present invention is a box for storing electrical equipment having an air vent on at least one of the front, back, left and right sides, which is molded into a box shape that opens in a predetermined direction, and a cover member having an inlet on the side opposite the opening is installed on the inside of the face with the opening facing the air vent side, covering the air vent, while a waterproof board is attached to the inside of the air vent within the cover member, and the surface of the waterproof board is provided with irregularities to increase the contact area with the air that flows into the cover member from the air vent, and further, a gap is formed between the outer peripheral edge of the waterproof board and the inner surface of the cover member. Claim 3 The invention described in Claim 1 or 2 In the invention described in the above, a drain hole is provided below the air vent in the surface, and an inclined surface that slopes downward toward the drain hole is provided on the bottom surface of the cover member. do. Effect of the Invention

[0008] The method according to claims 1 and 2 According to the invention, a cover member is formed in a box shape opening in a predetermined direction, and an inlet is opened on the side opposite the opening, and is placed on the inside of the surface on which the air vent is opened with the opening facing the air vent, covering the air vent, while a waterproof board is attached to the inside of the air vent in the cover member, and a gap is formed between the outer periphery of the waterproof board and the inner surface of the cover member. Therefore, air that has flowed into the cover member from the air vent can flow into the electrical equipment storage box through the inlet more smoothly than before, making it possible to provide an electrical equipment storage box that can achieve efficient ventilation without compromising waterproofness. Furthermore, according to the invention described in claim 1, the waterproof board is provided with a bulge portion that bulges toward the air vent, and the waterproof board has a tapered shape from the outer peripheral edge toward the bulge portion, so that the air that flows into the cover member from the air vent can be guided more smoothly to the inlet, resulting in a box for storing electrical equipment with even higher ventilation efficiency. In addition, according to the invention described in claim 2, the surface of the waterproof board is provided with projections and recesses to increase the contact area with the air that has flowed into the cover member through the air vents. Therefore, for example, by providing a large number of recesses, it is possible to make it easier for water droplets to be adsorbed on the waterproof board, and depending on the shape of the projections, it is possible to reduce wind noise, resulting in a box for storing electrical equipment that is improved in waterproofness and prevents noise, etc. Also, Claim 3According to the invention described in the above, a drainage hole is provided below the air vent in the box for storing electrical equipment, and the bottom surface of the cover member is provided with an inclined surface that slopes downward toward the drainage hole, so that water droplets that form on the surface of the waterproof board or inside the cover member can be smoothly and reliably drained through the drainage hole to the outside of the cover member, and ultimately to the outside of the box for storing electrical equipment, thereby improving waterproofing. [Brief description of the drawings]

[0009] [Figure 1] FIG. 4 is an explanatory diagram showing the electrical equipment storage box from the front side. [Diagram 2] FIG. [Diagram 3] 1 is a front perspective explanatory view showing a disassembled waterproof structure of an electrical device storage box; FIG. [Figure 4] 4 is an explanatory diagram showing the waterproof structure of the electrical equipment storage box from the front side; FIG. [Diagram 5] 4 is an explanatory diagram showing a vertical cross section at the center position in the left-right direction of the waterproof structure of the electrical equipment storage box; FIG. [Figure 6] FIG. 13 is an explanatory perspective view showing a modified example of the water blocking board. [Figure 7] FIG. 13 is an explanatory perspective view showing another modified example of the water blocking board. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An electric device storage box (hereinafter simply referred to as a box) according to one embodiment of the present invention will be described in detail below with reference to the drawings.

[0011] Fig. 1 is an explanatory diagram showing the box 1 from the front side. Fig. 2 is an explanatory perspective view showing the inside of the door 3. Fig. 3 is an explanatory perspective view showing the waterproof structure of the box 1 in an exploded state from the front side. Fig. 4 is an explanatory view showing the waterproof structure of the box 1 from the front side. Fig. 5 is an explanatory view showing a vertical cross section at the center position in the left-right direction of the waterproof structure of the box 1.

[0012] The box 1 has a box body 2 having an opening on the front side by connecting a pair of side panels, a top panel, a bottom panel, and a back panel, and a door 3 for opening and closing the front opening of the box body 2. Various electric devices such as information and communication devices are stored inside the box 1. In addition, a number of slit-shaped air vents 4, 4... are opened in the lower part of the door 3 as ventilation holes. Further, below the air vents 4, 4... in the door 3, drainage holes 5 are opened which are slit-shaped and longer in the left-right direction than the air vents 4, so that rainwater and the like that has infiltrated into the inside of the door 3 through the air vents 4, 4... can be drained from the drainage holes 5 to the outside of the box 1. The waterproof structure is provided on the inside of the door 3 and includes a waterproof plate 11, which is an essential part of the present invention and is located behind the air vents 4, 4..., and a cover member 12 attached to surround the waterproof plate 11 from the rear side.

[0013] The waterproof structure of the box 1 comprises a cover member 12 fixed to the inner surface of the door 3, a waterproof plate 11 arranged in front of the cover member 12 to prevent rainwater or the like blown into the cover member 12 from the air vents 4, 4·· from directly hitting a dustproof filter 13, a filter 13 arranged on the rear side of the cover member 12 so as to cover the inlets 16, 16··, and a pressing frame 14 for fixing the filter 13. The cover member 12 is formed by bending a metal plate into a box shape having a top surface portion 12A, a left side surface portion 12B, a right side surface portion 12C, a bottom surface portion 12D, and a back surface portion 12E, and opening to the front. The cover member 12 has flanges 15 bent outward at the top, bottom, left and right sides at the front ends of the top, bottom, left and right sides, respectively, and the flanges 15, 15... function as screw fastening parts for screwing the cover member 12 itself to the inner surface of the door 3. The cover member 12 has inlets 16, 16... at the rear surface 12E thereof for allowing air that has flowed into the cover member 12 to flow into the box body 1.

[0014] Furthermore, fixing pieces 17 for fixing a waterproof board 11 (described later) are provided on the left and right side portions 12B, 12C of the cover member 12, protruding inward on the left and right sides, respectively. In addition, the left portion of the bottom portion 12D of the cover member 12 is an inclined surface that slopes downward toward the right side, while the right portion of the bottom portion 12D is an inclined surface that slopes downward toward the left side. The central portion of the bottom portion 12D in the left-right direction is recessed furthest downward, and serves as a drainage portion 18 for draining water from the drainage hole 5. The bottom portion 12D is also formed as an inclined surface that slopes downward toward the front from the back portion 12E.

[0015] The waterproof board 11 is a flat metal plate formed into a rectangular shape when viewed from the front, and screw holes 19, 19 are drilled at the upper part of both left and right edges for screwing the waterproof board 11 to the fixing pieces 17, 17. The left and right width of the waterproof board 11 is approximately the same as the left and right width of the ventilation part in the door 3 where the ventilation holes 4, 4... are provided, but is narrower than the left and right width of the cover member 12. The vertical length of the waterproof board 11 is also approximately the same as the vertical length of the ventilation part, but is shorter than the vertical length of the cover member 12.

[0016] Filter 13 is sized to cover all of inlets 16, 16... of cover member 12. Pressing frame 14 is a frame body in which openings similar to inlets 16, 16... are formed, and filter 13 can be clamped and fixed from the front and rear by cover member 12 and pressing frame 14 by screwing the rear side of filter 13 to rear part 12E of cover member 12.

[0017] The waterproof structure including the waterproof plate 11, the cover member 12, the filter 13, and the pressing frame 14 is provided by screwing the waterproof plate 11 to the fixing pieces 17, 17 to set the waterproof plate 11 in the cover member 12, attaching the filter 13 and the pressing frame 14 to the rear side of the rear part 12E of the cover member 12, and then screwing the flange parts 15, 15... of the cover member 12 to a predetermined position on the inner surface of the door 3. In this waterproof structure, the waterproof plate 11 is positioned so as to cover the rear side of the ventilation holes 4, 4..., and the drainage part 18 of the cover member 12 is positioned behind the drainage hole 5 (Figs. 4 and 5). Also, gaps are formed between the outer peripheral edge of the waterproof plate 11 and the top part 12A, the left and right side parts 12B, 12C, and the bottom part 12D of the cover member 12. Therefore, the air that flows into the cover member 12 through the air vents 4, 4·· hits the waterproof board 11, then flows around the top, bottom, left and right of the waterproof board 11 and flows into the box body 2 through the inlets 16, 16·· and the filter 13. Water droplets that adhere to the waterproof board 11 and the top surface 12A and the left and right side surfaces 12B, 12C of the cover member 12 fall onto the bottom surface 12D. The water droplets reach the drainage section 18 along the inclined bottom surface 12D, and are finally discharged outside the cover member 12 and eventually outside the box body 1 through the drainage holes 5.

[0018] According to the box 1 having the above-mentioned waterproof structure, the door 3 that opens and closes the front opening of the box body 2 has the air vents 4, 4··, and the cover member 12, which is formed in a box shape that opens to the front and has the inlets 16, 16·· at the rear part 12E, is installed so as to cover the air vents 4, 4·· from the inside of the door 3, while the waterproof board 11 is attached to the cover member 12 so as to be located behind the air vents 4, 4·· in the cover member 12, and a gap is formed between the outer periphery of the waterproof board 11 and the inner surface of the cover member 12. Therefore, the air that flows into the cover member 12 from the air vents 4, 4·· can flow into the box 1 through the inlets 16, 16·· more smoothly than before, and the box 1 can be made to realize efficient ventilation without reducing waterproofness.

[0019] In addition, drainage hole 5, which is formed as a slit that is longer in the left-right direction than each of the air vents 4, is opened below the air vents 4, 4, etc. in the door 3, and an inclined surface that slopes downward toward the drainage hole 5 is provided on the bottom portion 12D of the cover member 12. Therefore, water droplets that form on the surface of the waterproof board 11 or inside the cover member 12 can be smoothly and reliably drained through the drainage hole 5 to the outside of the cover member 12 and ultimately to the outside of the box body 1, thereby improving waterproofing.

[0020] The electrical equipment storage box according to the present invention is not limited to the above-described embodiment, and the overall configuration of the box as well as the configuration related to the waterproof structure can be appropriately modified as necessary without departing from the spirit of the present invention.

[0021] For example, in the above embodiment, the flat waterproof board 11 is used as the waterproof board, but a waterproof board 21 as shown in FIG. 6 may be used. The waterproof board 21 is shaped so that the center part bulges toward the ventilation holes 4, 4·· when installed in the cover member 12 (a bulging part is provided), and the waterproof board 21 is shaped so that it tapers from the outer periphery toward the center. In addition, a large number of recesses 22, 22·· are provided on the surface of the waterproof board 21. When such a waterproof board 21 is used, the air blown against the waterproof board 21 is smoothly guided along the surface of the waterproof board 21 to the rear side, i.e., the inlet 16, 16·· side, so that more efficient ventilation can be expected. In addition, since the contact area with the air is increased by the large number of recesses 22, 22··, when the air blows against the waterproof board 21, water droplets are easily adsorbed on the surface of the waterproof board 21, and thus improved waterproofing can be expected.

[0022] Waterproof boards 23A, 23B as shown in Fig. 7 may also be used. In the waterproof board 23A shown in Fig. 7(a), the central part bulges toward the ventilation holes 4, 4··, and V-shaped ribs 24, 24·· are provided on the outer periphery. On the other hand, in the waterproof board 23B shown in Fig. 7(b), the central part bulges toward the ventilation holes 4, 4··, and a plurality of ribs 25, 25·· are provided on the outer periphery, extending outward from a position near the center in all directions. By using the waterproof boards 23A, 23B provided with such ribs 24, 25, it is expected that the wind noise generated by the air flowing into the cover member 12 can be reduced.

[0023] Furthermore, in the above embodiment, an air vent is provided in the door that opens and closes the front opening of the box body, and a waterproof structure is provided on the inside of the door, but there is no problem if an air vent is provided in the side or back of the box body and a waterproof structure is provided on the inside of the side or back to cover the air vent. Furthermore, in the above embodiment, gaps are formed between all of the top, bottom, left and right outer peripheral edges of the waterproof board and the inner surface of the cover member, but gaps may be formed only between both left and right side edges and the cover member, or gaps may be formed only between the upper edge and both left and right side edges and the inner surface of the cover member, and the design can be modified as appropriate to determine which edge of the waterproof board has a gap formed between it and the inner surface of the cover member. In addition, it is possible to apply a water-repellent finish to the surface of the waterproof board or the inner surface of the cover member, thereby creating a structure that allows water droplets adhering to the surface of the waterproof board or the inner surface of the cover member to be drained extremely smoothly. [Explanation of symbols]

[0024] 1... Box body for storing electrical equipment, 2... Box body, 3... Door, 4... Ventilation hole, 5... Drainage hole, 11, 21, 23A, 23B... Waterproof board, 12... Cover member, 12D... Bottom portion, 12E... Rear portion, 13... Filter, 14... Pressing frame, 16... Inlet, 17... Fixing piece, 22... Recess, 24, 25... Rib (convex portion).

Claims

1. A box for storing electrical equipment having a ventilation hole on at least one of the front, rear, left and right surfaces, A cover member is formed in a box shape opening in a predetermined direction and has an inlet on a side opposite to the opening. The cover member is installed on the inside of the surface with the opening facing the ventilation hole, and covers the ventilation hole. A waterproof plate is attached to the inside of the air hole in the cover member, The waterproof board is provided with a bulging portion that bulges toward the air hole side, and the waterproof board has a tapered shape from an outer circumferential edge toward the bulging portion, The electrical equipment storage box further comprises a gap formed between the outer periphery of the waterproof board and the inner surface of the cover member.

2. A box for storing electrical equipment, having a ventilation hole on at least one of the front, rear, left and right sides, A cover member is formed in a box shape opening in a predetermined direction and has an inlet on a side opposite to the opening. The cover member is installed on the inside of the surface with the opening facing the ventilation hole, and covers the ventilation hole. A waterproof board is attached to the inside of the air vent in the cover member, and a surface of the waterproof board is provided with irregularities for increasing a contact area with the air flowing into the cover member through the air vent, The electrical equipment storage box further comprises a gap formed between the outer periphery of the waterproof board and the inner surface of the cover member.

3. A drain hole is provided below the air vent on the surface, 3. The electrical equipment storage box according to claim 1, wherein the cover member has a bottom surface provided with an inclined surface that slopes downward toward the drain hole.

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