JPH0530397Y2 - - Google Patents

Description

[Detailed description of the invention] ○ Industrial fields of application The invention is applicable to power distribution equipment such as power distribution lines, transmission lines, and communication lines, relay equipment, and control equipment that are placed on the road or suspended from utility poles and used outdoors. This relates to the upper structure of a waterproof case that is installed in a building, is exposed to wind and rain, and needs to secure a communication space for heat dissipation and ventilation.

○ Purpose of the invention The present invention aims to secure sufficient heat radiation space in the upper structure of this type of waterproof case to enhance the heat radiation effect against the heat generated by electrical equipment inside the waterproof case, and to prevent water from entering. The purpose is to reliably prevent this.

○Means for achieving the above object The present invention provides a ventilation opening 2 in the center of the top wall 1a of the main body case 1, and forms a short cylindrical upright wall 3 surrounding the ventilation opening 2. 3, a first cover 5 is pressed into contact with the upper end of the upright wall 3 via the elastic packing 4, and a second cover 6 is placed above the first cover 5 with a ventilation space A in between. Attach the lid 7 to the top surface of the second cover 6.
A window 9 is formed in the center of the first cover 5 by placing the windows adjacent to each other and above the fan 8 installed in the ventilation opening 2, thereby creating a first labyrinth B1 and a second labyrinth B2 between the ventilation space A and the outside air. A labyrinth structure consisting of a third labyrinth B3 and a fourth labyrinth B4 is interposed, and a number of drain holes 17 are passed through the lower end of the first hanging piece 10 of the first cover 5 to connect the first cover 9 and the main body. A blind hole-like drainage space C is formed between the top wall 1a of the case and the top wall 1a of the case.

○ Examples The following will explain the embodiments shown in the drawings.

The main body case 1 has an elastic packing 1 on its front side.
It can be freely sealed with a door 15 via a door 6, and a ventilation opening 2 is opened in the center of the top wall 1a.

A short cylindrical upright wall 3 surrounding the ventilation opening 2 is formed, and an elastic packing 4 shown in FIGS. 3 and 4 is fitted to the upper end of the upright wall 3, and the elastic A first cover 5 is pressed into contact with a gasket 4, a second cover 6 is attached above the first cover 5 with a ventilation space A in between, and a lid 7 is placed adjacent to the upper surface of the second cover 6.

A window 9 is formed in the center of the first cover 5 by being positioned above the fan 8 installed in the ventilation opening 2.
A first hanging piece 10 facing the outer surface of the upright wall 3 and a first hanging piece 10 facing the upper surface of the top wall 1a are arranged around the cover 5.
A first upright piece 12 is formed by bending the horizontal piece 11 and an extension of the first horizontal piece 11 upward, and a second vertical piece 12 is formed on the periphery of the second cover 6 and faces the first hanging piece 10.
A second horizontal piece 14 is formed by forming a hanging piece 13 and bending its lower end extension in the horizontal direction.
4 and the first upright piece 12, a gap G2 is formed between the upper edge of the first upright piece 12 and the lid 7', and the peripheral part of the lid 7 is moved downward. It is bent to form a hanging wall 7a.

A gap G3 is formed below the hanging wall 7a (between the main body case and the upper bent piece 15a of the door 15), and a first labyrinth B is formed between the ventilation space A and the outside air.
1. Second maze B2, third maze B3, fourth maze B4
A maze structure consisting of

A large number of drain holes 17 are passed through the lower end of the first hanging piece 10 of the first cover 5 to form a blind hole-shaped drain space C between the first cover 9 and the top wall 1a of the main body case.

1 and 2, 18 is a mounting screw, 19 is a lid mounting bracket, 28 is a fan mounting bracket,
29 is a wire mesh.

Due to the maze structure, ventilation is possible as shown by the imaginary line arrow in FIG. Rainwater that has entered the maze via space C is removed.

The intake port can be placed on the side of the main body case or at any other suitable location, but in the embodiments shown in FIGS. A large number of oval holes 21 are provided in the center of the integrated bottom table 20 to serve as air intake ports.

As a waterproof measure for the above-mentioned intake port, a waterproof plate 22 is attached above the oval hole 21 via a support plate 23, and a second waterproof plate 24 is attached above the waterproof plate 22. Referring to FIGS. 7 and 8, the second waterproof plate 24 includes a mounting piece 24a and a vertical wall 24.
b It has a structure consisting of a horizontal wall 24c and a processed inclined wall 24d, and has a shape that surrounds the waterproof plate 22. Attachment piece 24a for bottom stand 20 and second waterproof board 24
A flat rubber packing 27 is interposed between the two.

In this way, air intake in the direction of arrow A is freely possible, but
Rainwater from below in the direction of arrow B is prevented from entering into the main body case 1 by the waterproof plate 22 and the second waterproof plate 24.

Note that since the main body case 1 is to be hung from a utility pole or the like, the lower surface is open, but in the case of a mounting method, there is a horizontal air intake port or air intake that penetrates the skirt portion 20b of the bottom stand 20. It is necessary to provide an opening.

The horizontal surface 20a of the bottom stand 20 is equipped with input terminals, output terminals, control terminals, measuring instruments, mounting stands for internal electrical equipment, and the like.

The door 15 and the main body case 1 are connected by interposing a door fastener 25 and a door pivot 26 to ensure sufficient waterproofness and to allow the door to open and close forward.

○ Effects of the invention This invention is able to dissipate heat and ventilate while ensuring waterproofness through the labyrinth structure formed between the ventilation space and the outside air.In addition, the existence of the drainage space allows rainwater that enters the labyrinth to be drained from the main body. It can be removed without being penetrated into the case, and has the effect of increasing the waterproofness of various waterproof cases (casings) that require heat radiation and ventilation.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view showing the upper structure of a waterproof case embodying the present invention, and FIG. 2 is a partial plan view showing the same with the lid removed. FIG. 3 is a longitudinal sectional view of the elastic packing (rubber packing), and FIG. 4 is a plan view thereof. FIG. 5 is a vertical sectional view showing the lower structure of the waterproof case, and FIG. 6 is a bottom view. FIG. 7 is a longitudinal sectional view of the second waterproof plate, and FIG. 8 is a plan view thereof. FIG. 9 is a front view schematically showing the waterproof case, and FIG. 10 is a cross-sectional view thereof. FIG. 11 is an explanatory diagram showing the operation of the present invention. DESCRIPTION OF SYMBOLS 1... Main body case, 2... Ventilation opening, 3... Upright wall, 4... Elastic packing, 5... First cover, 6
...Second cover, 7...Lid, 9...Window, 15...
Water outlet, B1...first maze, B2...second maze,
B3...Third maze, B4...Fourth maze, C...Drainage space.

Claims (1)

[Scope of utility model registration request] A ventilation opening 2 is provided in the center of the top wall 1a of the main body case 1.
At the same time, a short cylindrical upright wall 3 surrounding the ventilation opening 2 is formed, and an elastic packing 4 is fitted to the upper end of the upright wall 3. The cover 5 is brought into pressure contact, the second cover 6 is attached above the first cover 5 with the ventilation space A in between, and the lid 7 is placed adjacent to the upper surface of the second cover 6.
A window 9 is formed in the center of the first cover 5 by being positioned above the fan 8 installed in the ventilation opening 2, and a first hanging piece is provided at the periphery of the first cover 5, facing the outer surface of the upright wall 3. and a horizontal piece 11 facing the upper surface of the top wall 1a.
A first upright piece 12 is formed by bending an extended portion of the first horizontal piece 11 upward, and a second hanging piece 13 is formed on the periphery of the second cover 6 and faces the first hanging piece 10.
The second horizontal piece 14 is formed by bending the lower end extension part in the horizontal direction, and a gap G1 is formed between the edge of the second horizontal piece 14 and the first upright piece 12.
A gap G2 is formed between the upper edge of the upright piece 12 and the lid 7, the peripheral part of the lid 7 is bent downward to form a hanging wall 7a, and a gap G3 is formed below the hanging wall 7a,
Between the ventilation space A and the outside air, there is a horizontal ventilation space A.
a first maze B1 on a vertical plane continuous with the first maze B1 on a vertical plane, and a second maze B2 on a horizontal plane continuous with the first maze B1 on a vertical plane;
A third labyrinth B3 that communicates with the second labyrinth B2 on the horizontal plane via a gap G1, and a fourth labyrinth B4 that communicates with the third labyrinth B3 via a gap G2 that is not opposite the gap G1. A large number of drain holes 17 are inserted through the lower end of the first hanging piece 10 of the first cover 9 to form a blind hole-like structure between the first cover 9 and the top wall 1a of the main body case. An upper structure of a waterproof case characterized by forming a drainage space C.