JP7350427B2 - Drainage structure of equipment storage box - Google Patents

Description

The present invention relates to a drainage structure for an equipment storage box that drains moisture that has entered the inside of the equipment storage box installed outdoors to the outside.

Conventionally, as a water draining structure of such an equipment storage box, there is one disclosed in Patent Document 1, for example. In this drainage structure, an external fitting member is fitted onto an internal fitting cylinder that directly extends from a drainage hole formed on the bottom surface of a box installed outdoors. The outer fitting member has an enlarged hollow formed in a portion surrounding the tip of the inner fitting cylinder, and this enlarged hollow is filled with a large number of grains. Further, a partition that partitions the hollow space of the inner fitting cylinder and the enlarged hollow of the outer fitting member is provided at the distal end surface of the inner fitting cylinder.

When water comes out in the box due to condensation, etc., the water falls from the drain hole into the hollow of the inner cylinder, passes through the gap between the partition and the granules, and enters the drain hole formed on the bottom of the outer fitting. It is discharged outside from the drain. In addition, if the bottom of the box gets splashed by rainstorms, etc., it is possible that the droplets will enter the drainage hole of the external drainage hole, but since there is an expanding hollow filled with granules inside, the droplets will not be able to escape. collides with the particles and is mostly stopped.

JP2008-282841A

However, the conventional water draining structure of the equipment storage box is complicated and requires many parts. For this reason, it takes a lot of man-hours to manufacture and also costs a lot of parts, making it impossible to construct it at a low cost.

The present invention was made to solve such problems,
In a drainage structure of an equipment storage box that is formed on the bottom of an equipment storage box that stores electrical equipment and is installed outdoors, and discharges moisture that has entered the inside of the equipment storage box to the outside of the equipment storage box,
A drain hole formed in the bottom surface that penetrates between the inside and the outside of the equipment housing box, and an area that covers the water drain hole, and a drain hole that covers the water drain hole from the outside of the equipment housing box and contacts the bottom surface. a net having an area to cover the drain hole, one flat side is fixed to the bottom surface with the net sandwiched between the net and the bottom surface; It is characterized by comprising a flat fixing plate having a through hole formed at a position that does not overlap with the drain hole when fixed to the bottom surface.

According to this configuration, moisture that has entered the inside of the equipment storage box passes through the screen through the drain hole formed on the bottom of the equipment storage box, and is discharged to the outside of the equipment storage box through the through hole formed in the fixing plate. be done. In addition, moisture that is blown from the outside of the equipment housing box onto the bottom surface of the equipment housing box by wind and rain, etc., and tries to enter the inside of the equipment housing box through the through hole of the fixing plate is removed from the equipment housing box facing the through hole of the fixing plate. Since there is no drain hole on the bottom of the equipment storage box, most of the water hits the bottom of the equipment storage box and is prevented from entering. Therefore, we have developed a water drainage structure for the equipment storage box that can quickly drain moisture that has entered the inside of the equipment storage box to the outside and that can effectively prevent moisture from entering the equipment storage box from the outside to the inside. This can be realized with a simple configuration using a net and a fixing plate. Therefore, it is possible to provide a water draining structure for an equipment storage box that has good water drainage properties and can effectively prevent water from entering from the outside, at a low cost while reducing manufacturing man-hours and parts costs.

According to the present invention, it is possible to inexpensively provide a water draining structure for an equipment storage box that has good water drainage properties and can effectively prevent moisture from entering from the outside by suppressing manufacturing man-hours and parts costs. I can do it.

FIG. 1 is an exploded perspective view of a water draining structure of an equipment storage box according to an embodiment of the present invention. It is a figure which shows each element which comprises the water drainage structure of the equipment storage box shown in FIG. FIG. 2 is an enlarged view showing the water draining structure of the equipment storage box shown in FIG. 1; FIG. 2 is a diagram showing a drainage structure of an equipment storage box according to a comparative example, which is compared to the drainage structure of the equipment storage box shown in FIG. 1;

Next, a description will be given of a form for implementing a water draining structure for an equipment storage box according to the present invention.

FIG. 1 is an exploded perspective view of a water drain structure of an equipment storage box according to an embodiment, which is configured on the bottom surface 1a of the equipment storage box.

The equipment storage box is installed outdoors to accommodate electrical equipment, and a cable connected to the electrical equipment is inserted through a through hole (not shown) formed in the bottom surface 1a or the like.

The drainage structure of the equipment storage box according to one embodiment includes a drainage hole 1b, a mesh 4, and a fixing plate 5, and drains moisture that has entered the inside of the equipment storage box to the outside of the equipment storage box. .

The drain holes 1b are shown enlarged in the bottom view of FIG. 2(a), and a plurality of drain holes, four in this embodiment, are formed in the bottom surface 1a, penetrating between the inside and outside of the equipment housing box. ing. Attachment holes 1c for attaching the fixing plate 5 are formed above and below each drain hole 1b.

The net 4 is shown enlarged in the plan view of FIG. 2(b), and has an area that covers the four drain holes 1b. It is attached to the bottom surface 1a of the storage box 1. In this embodiment, the net 4 is formed into a chamfered square shape large enough to cover the four drain holes 1b. In addition, as shown in the enlarged plan view of FIG. 2(c), the net 4 is made of stainless steel woven in a plain weave in which vertical lines 4a and horizontal lines 4b alternately intersect one by one while maintaining a constant interval. Constructed from woven wire mesh.

The fixing plate 5, whose plan view is shown in FIG. 2(d) and its side view is shown enlarged in FIG. 2(e), is formed from a rectangular metal plate and covers the four drain holes 1b and the mesh 4. It has an area. This fixed plate 5 has one through hole 5a in the center and a pair of attachment holes 5b at upper and lower positions sandwiching the through hole 5a. The formation pitch of the pair of attachment holes 5b is set to the same pitch as the formation pitch of the attachment holes 1c formed in the bottom surface 1a. As shown in FIG. 3, the fixed plate 5 has a rivet 6 inserted into its mounting hole 5b and a mounting hole 1c formed in the bottom surface 1a, and the tip of the rivet 6 is crushed, thereby fixing the net 4. It is fixed to the bottom surface 1a by being sandwiched between the bottom surface 1a and the bottom surface 1a. FIG. 3(a) is a bottom view of the fixing plate 5 fixed to the bottom surface 1a, and FIG. 3(b) is a sectional view. The through hole 5a is formed at a position that does not overlap with any of the drain holes 1b when the fixing plate 5 is fixed to the bottom surface 1a while covering the four drain holes 1b via the net 4.

According to the water drainage structure of the equipment housing box according to the present embodiment, moisture that has entered the equipment housing box through the cables etc. drawn into the equipment housing box is formed on the bottom surface 1a of the equipment housing box. The water passes through the screen 4 through the drain hole 1b, and is discharged to the outside of the equipment housing box through the through hole 5a formed in the fixing plate 5. In addition, moisture, dust, insects, etc. that are blown from the outside of the equipment storage box onto the bottom surface 1a of the equipment storage box by wind and rain and try to enter the inside of the equipment storage box through the through hole 5a of the fixing plate 5 are prevented from being fixed. Since there is no drain hole 1b on the bottom surface 1a of the equipment storage box facing the through hole 5a of the plate 5, most of the water hits the bottom surface 1a of the equipment storage box and is prevented from entering. Therefore, we have developed a water drainage structure for the equipment storage box that can quickly drain moisture that has entered the inside of the equipment storage box to the outside and that can effectively prevent moisture from entering the equipment storage box from the outside to the inside. This can be realized with a simple configuration using the net 4 and the fixing plate 5. Therefore, it is possible to provide a water draining structure for an equipment storage box that has good water drainage properties and can effectively prevent water from entering from the outside, at a low cost while reducing manufacturing man-hours and parts costs.

Further, according to the water draining structure of the equipment storage box according to the present embodiment, the vertical lines 4a and the horizontal lines 4b alternately intersect one by one while maintaining a constant interval to form the net 4, so that the equipment storage box can be drained. In the portion of the net 4 held between the fixed plates 5 on the bottom surface 1a without the punch holes 1b, a gap is formed through which moisture passes due to a step created when the vertical lines 4a and the horizontal lines 4b of the net 4 intersect. Therefore, moisture flowing from the drain hole 1b formed in the bottom surface 1a of the equipment storage box through the net 4 to the through hole 5a of the fixing plate 5 is transferred to the bottom surface 1a of the equipment storage box where there is no drain hole 1b. 5, the part of the net 4 that is held between the nets 4 and 5 quickly reaches the through hole 5a of the fixing plate 5 through a gap formed by a step created when the vertical line 4a and the horizontal line 4b of the net 4 intersect, and the equipment storage box is closed. is discharged to the outside.

FIGS. 4A and 4B are a plan view and a side view of a fixing plate 5A used in a drainage structure for an equipment storage box according to a comparative example, which is compared with the drainage structure for an equipment storage box according to the present embodiment. It is. Note that in FIG. 4, the same or corresponding parts as in FIGS. 2 and 3 are designated by the same reference numerals, and the explanation thereof will be omitted.

This fixed plate 5A has four through holes 5c formed in place of the through holes 5a in the fixed plate 5. The diameter and formation pitch of each through hole 5c are the same as the diameter and formation pitch of the drain hole 1b shown in FIG. 2(a).

FIG. 4(c) is a bottom view showing a water draining structure of an equipment storage box according to a comparative example configured using the above-mentioned fixing plate 5A instead of the fixing plate 5 in the above-described embodiment. Depending on the drainage structure of the equipment housing box according to such a comparative example, moisture that has entered the equipment housing box passes through the drain hole 1b formed on the bottom surface 1a of the equipment housing box, through the mesh 4, and reaches the fixing plate 5A. The equipment is quickly discharged to the outside of the equipment storage box through the through hole 5c formed in the equipment storage box. However, moisture that is blown from the outside of the equipment storage box onto the bottom surface 1a of the equipment storage box by wind and rain, etc. easily enters the inside of the equipment storage box through the through hole 5c of the fixing plate 5A through the mesh 4 and the drain hole 1b. Resulting in. On the other hand, depending on the drainage structure of the equipment storage box according to the present embodiment, as described above, the drainage hole 1b does not exist on the bottom surface 1a of the equipment storage box facing the through hole 5a of the fixed plate 5. Most of the moisture that is blown onto the bottom surface 1a of the equipment storage box by wind and rain hits the bottom surface 1a of the equipment storage box and is prevented from entering.

In the above embodiment, a case has been described in which four drain holes 1b are formed in the bottom surface 1a of the equipment storage box, and one through hole 5a is formed in the fixing plate 5. However, the number of drain holes 1b formed in the bottom surface 1a of the equipment storage box and the number of through holes 5a formed in the fixing plate 5 are different from each other when the fixing plate 5 is fixed to the bottom surface 1a. It is not limited to this as long as it is formed at a position that does not overlap with the through hole 5a. For example, one drain hole 1b may be formed in the bottom surface 1a of the equipment storage box, and a plurality of, for example, four, through holes 5a may be formed in the fixing plate 5. Such a configuration also provides the same effects as those of the above embodiment.

1a...bottom of equipment storage box, 1b...drain hole, 1c...attachment hole, 4...net, 4a...warp, 4b...weft, 5...fixing plate, 5a...through hole, 5b...attachment hole, 6...rivet

Claims (2)

In a drainage structure of an equipment storage box that is formed on the bottom of an equipment storage box that stores electrical equipment and is installed outdoors, and discharges moisture that has entered the inside of the equipment storage box to the outside of the equipment storage box,
A drain hole formed in the bottom surface that penetrates between the inside and outside of the equipment housing box, and an area that covers the water drain hole, and a drain hole that covers the water drain hole from the outside of the equipment housing box and the bottom surface. a net attached in contact with the drain hole, the net having an area covering the drain hole, and one flat side sandwiching the net between the net and the bottom surface and being fixed to the bottom surface. A water drain for an equipment storage box, comprising a flat fixing plate having a through hole formed in a position that does not overlap the drain hole when fixed to the bottom surface covering the drain hole. structure. 2. The drainage structure for an equipment storage box according to claim 1 , wherein a plurality of said drainage holes are formed and one said through hole is formed.

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