JPH0140247Y2 - - Google Patents

Description

[Detailed description of the invention] A. Industrial application field This invention relates to the improvement of a box used in outdoor low-voltage distribution lines.In particular, the fuses inside the box are damaged by rainwater that enters through the ventilation window (b) of the box. It relates to a structure designed to prevent equipment from degrading insulation or rusting.

B. Prior art and purpose of the present invention In service branch boxes used in outdoor low-voltage distribution lines, equipment and wires that generate heat, such as fuses, breakers, and electromagnetic switches, are housed inside the box. The temperature rises rapidly. Therefore, the box is equipped with a ventilation window (b) that exhausts the hot air inside the box and brings in cold air from the outside, but this ventilation window not only allows air to flow through it, but also allows rainwater to escape during heavy wind and rain. This also causes other substances to enter the interior, leading to a decrease in the insulation of the stored equipment and the formation of rust. This proposal is intended to solve these problems.

C. Structure of the device To achieve this goal, the device has a front opening with a lid that can be opened and closed, and a fuse and other equipment that generates heat is housed in the center of the box, and the device is placed above both sides of the box. In cases where a ventilation window is provided at the bottom of the box body, and a small hole for draining water and a ventilation opening with a mesh are provided on the bottom of the box body, there is a space inside the box body that surrounds the ventilation window on the side and extends vertically. A ventilation duct with openings at the top and bottom ends is provided, and a rain catch 11 is provided on the bottom surface of the box body to cover the mesh of the ventilation port, and the rain catch 11 is connected to the horizontal top plate. 11
a and a back plate 11e extending downward from the rear edge.
, both side plates 11c provided with notches 11b, and a hanging piece 11d bent downward from the front edge of the upper plate 11a.
It is characterized by being composed of.

D Example Examples of the present invention will be described below based on the drawings.

Reference numeral 1 denotes a box body with an opening 1' formed on the front surface, and a lid 2 which can be opened and closed to close the opening. This main body 1 and lid body 2 are made of aluminum,
It is made of metal such as iron or stainless steel, and three ventilation windows 1b are provided vertically in two rows at the top of both sides 1a and 1a of the main body.

Reference numeral 3 indicates a hinge for attaching the lid body, 4 indicates a locking pin, and 5 indicates a support fitting for attaching to a telephone pole or the like fixed to the back surface 1c of the main body.

1d is a small hole for draining water provided in both corners of the bottom surface 1e of the main body, 1f is a rectangular ventilation hole provided in the front center of the bottom surface, 6 is a metal mesh stretched over the ventilation hole, 7 numeral 8 represents a wire insertion bush made of rubber, numeral 8 represents a connecting wire, and numeral 9 represents a device such as a fuse, breaker, or relay that causes heat generation and is housed (attached) in the center of the box body.

Further, 10 is a ventilation duct that surrounds the ventilation window 10 on the side of the box body and extends vertically, and has openings 10a and 10b at the upper and lower ends, and is provided on both sides of the body, and 11 is the bottom surface. A horizontal upper plate 11a is a metal rain catcher located above the ventilation opening 1f and provided on the bottom thereof so as to cover the ventilation opening 1f, a back plate 11e extending downward from the rear edge, and a notch 11b.
It is composed of both side plates 11c provided with the following, and a hanging piece 11d bent downward from the front edge of the upper plate 11a.

E. Effect In the above configuration, when the fuse generates heat and the temperature inside the box rises, the hot air rises and collides with the inside of the top surface 1g, and the opening 10a at the top of the side ventilation duct.
It is then discharged to the outside through the ventilation window 1b. In addition, the cold air (outside air) outside the box enters through the ventilation opening 1f on the bottom and reaches the inside of the box through the gap g between the lid 2 and the rain cover flap 11d or through the notches 11b on both sides of the rain cover 11. There is. In addition, when there is heavy wind and rain, a large amount of rainwater will enter through the ventilation window or vent mentioned above along with the wind, but the rainwater will be blocked from entering the center of the box by the ventilation duct or rain catcher, and the rainwater will flow into the bottom of the main unit. The water is drained out of the box through a small drainage hole 1d or a ventilation opening 1f provided in the corner.

F. Effects of the invention As described above, this invention provides a ventilation duct and a rain catcher in the part of the main body where ventilation windows and vents are provided, and rainwater that enters along with outside air through these ventilation windows and vents is removed from the main body. As a result of placing the box in the center and blocking it from reaching the stored equipment, it is possible to prevent equipment insulation from deteriorating due to rainwater adhesion or rusting, without reducing the ventilation effect of the box, making it extremely practical. It's expensive. In particular, in this invention, the rain catcher 11 is a horizontal upper plate 11.
a and a back plate 11e extending downward from the rear edge.
, both side plates 11c provided with notches 11b, and a hanging piece 11d bent downward from the front edge of the upper plate 11a.
Since the rain has entered through the ventilation port, it is reflected back to the ventilation port 1f side, thereby preventing rain from entering the center of the main body. Therefore, rusting of the electrodes, terminals, etc. of the equipment can be prevented.

In addition, since the upper plate 11a of the rain shelter 11 is horizontal, it is possible to temporarily place installed or removed equipment such as fuses, breakers, relays, etc. on this part, and it also serves as a shelf (stand). This improves workability.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a front view of the box of the invention, Fig. 2 is a longitudinal sectional view of the box as seen from the front with some parts omitted, and Fig. 3 is a left side view of the box. Figure 4 is a vertical cross-sectional view of the box with some parts omitted as seen from the side, Figure 5 is a bottom view of the box, Figure 6 is a sectional view taken along line A-A in Figure 2, and Figure 7 is an enlarged cross-section of the ventilation window. figure,
FIG. 8 is a perspective view of the ventilation duct, and FIG. 9 is a perspective view of the rain catcher. 1... Box body, 1'... Opening, 1a... Side,
1b...Ventilation window, 1d...Drainage hole, 1e...
...bottom, 1f...ventilation port, 2...lid, 6...mesh, 9...equipment, 10...ventilation duct, 11...
...to catch the rain.

Claims (1)

[Scope of utility model registration request] The box body has a lid that can be opened and closed at the front opening, and equipment such as fuses that cause heat generation is stored in the center of the box body, and ventilation windows are provided above both sides of the body. The bottom of the box body is provided with a small hole for water drainage and a ventilation hole covered with a mesh. A ventilation duct is provided, and a rain catcher 11 is provided on the bottom of the box body to cover the mesh of the ventilation port.
The rain catch 11 includes a horizontal upper plate 11a, a back plate 11e extending downward from the rear edge, and a notch 11.
A box body for use in an outdoor low-voltage power distribution line, etc., characterized in that it is composed of both side plates 11c provided with a side plate 11c and a hanging piece 11d bent downward from the front edge of an upper plate 11a.