JPH0814394B2 - Ventilation fan - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frame of a ventilation fan of the type mounted on a wall.

[0002]

2. Description of the Related Art Conventionally, the frame of this type of ventilation fan is generally constructed as shown in FIG.

[0003] That is, bent double doors form the rear side of the steel plate of the square to form a side surface 101b, the apertured square hole with the indoor-side opening 101 c, the indoor-side opening 10
The top plate 103 and the bottom plate 104 are fixed by spot welding or the like to the side frame body 102 having the flange portion 101a as a portion left so as to surround the entire circumference of 1c to form a rectangular frame shape, The motor fixing leg 105 is fixed to the top plate 102 and the bottom plate 104, and the frame body is configured as described above.

In the front flange portion 101a, adjacent flanges are continuously formed at four corners of the frame,
Since it was integrally formed as a whole, the assembled frame was strong in strength.

[0005]

In such a conventional configuration, when the depth of the side surface 101b of the side frame body 102 is short, the material of the central portion is wasted, resulting in high cost and conversely long length. If this is attempted, there is a limit to this, and therefore the width dimension of the top plate 103 and the bottom plate 104 cannot be more than half the width dimension of the indoor side opening, and the depth dimension of the frame 101 is limited. In order to meet the demands of various types of ventilation fans, various types of frame dies were required, and each type of die was large, leading to an increase in manufacturing cost.

The present invention solves such a problem. The depth dimension of the frame is not limited, and different dimensions can be dealt with by simply changing the position of the mold, and even in this way. It is an object of the present invention to provide a ventilation fan capable of ensuring the strength of a frame body to be equal to or higher than that of a conventional one.

[0007]

In order to achieve the above-mentioned object, the present invention is formed by bending a strip-shaped steel plate into a rectangular frame shape opening to the inside and the outside of the room, and the opening end on the inside of the room. Each side of the section has a flange extending outward, and the switch mechanism, the outlet mounting base, and the shutter mechanism fixing base are fixed in a shape that connects the flanges adjacent to each other at the three corners. The structure is provided with a frame body provided with motor fixing legs.

[0008]

According to the present invention, since the frame body is formed by bending the strip-shaped steel plate with the above-described structure, it is possible to easily cope with various depth dimensions of the frame body. By forming the frame body in this way, the flange portions are discontinuous at the four corner portions of the frame body, but with a shape that connects the adjacent flange portions to three of these corner portions. Since the switch mechanism, the outlet mounting base, and the shutter mechanism fixing base are fixed, the flange portion is in a continuous state at this part,
In addition, the portion of the flange portion that overlaps with the above-mentioned fixed parts is strengthened in strength, and the strength of the frame body as a whole can be secured to be equal to or higher than the conventional strength.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

Two frames 1a, each of which is formed by bending a strip-shaped color steel plate into a U-shape, are prepared, and the tips of the two are abutted against each other to join them to form a frame body 1 in the shape of a rectangular frame. The openings at both ends are the indoor-side opening 7 and the outdoor-side opening 8, and the four flanges 1b extending outward are provided on the four sides of the opening end of the indoor-side opening 7. The flange portion 1b is provided to fix the ventilation fan to the wall surface, but since it is formed as described above, it is discontinuous at the four corners of the frame body 1. In the lower right corner of the discontinuous portion, a switch mechanism 3 for opening and closing a shutter (not shown) provided in the outdoor opening 8 is provided at the lower right corner and the adjacent right and lower sides. The flange portion 1c has a shape that connects the flange portions 1b.
It is fixed by crimping the claw 1c cut and raised.
Further, in the upper left corner, an outlet mount 4 for fixing an outlet for connecting the power cord of the ventilation fan inside the ventilation fan is provided.
It has a shape of connecting b and is fixed to the flange portion 1b.
Further, at the upper right corner, a shutter mechanism fixing base 5 for fixing the opening / closing mechanism of the shutter is fixed to the flange portion 1b in a shape that connects the adjacent right and upper flange portions 1b. Further, the motor fixing leg 2 is provided inside the frame body 1.
Has been fixed.

Since the frame body 1 having the above-mentioned structure is formed by bending a strip-shaped color steel plate, various frame bodies 1 having different depth dimensions can be easily manufactured with a simple mold.
In the frame body 1, since the flange portions 1b are discontinuous at the four corner portions, the strength of the corner portions is weak as it is, but the flange portions 1b adjacent to the three corner portions are adjacent to each other.
Since the switch mechanism 3, the outlet mounting base 4, and the shutter mechanism fixing base 5 are fixed in a shape that connects the above, the strength of the corners is increased, and the flange portion 1b that overlaps with the above-mentioned fixed parts is strong. The strength of the frame 1 as a whole is equal to or higher than that of the conventional one.

As described above, according to the ventilation fan of the embodiment of the present invention, the mold of the frame body 1 can be simplified and the manufacturing cost can be reduced. Even if the frame body 1 is manufactured by reducing the above, the strength of the frame body 1 can be secured to be equal to or higher than the conventional strength.

In this embodiment, the frame 1 is joined to two U-shaped frames 1a by abutting both ends thereof.
Although it is formed, it may be configured such that one long strip of steel plate is bent and both ends are joined at corners, and the means for forming a rectangular frame shape is not limited to that of this embodiment. Absent. In addition, the switch mechanism, the outlet mounting base, and the shutter mechanism fixing base are fixed at three positions among the four corners of the frame body 1, and the lateral load of the frame body 1 (the square frame of the frame body 1) is fixed only by this. The strength against the external force applied in the direction of crushing the shape is sufficient, but it goes without saying that another part may be fixed to the remaining one place. Further, the fixing positions of the above-mentioned components fixed to the three corners of the frame body 1 are not limited to the positions of this embodiment, and may be appropriately determined according to the specifications of the entire ventilation fan.

[0014]

As is apparent from the above embodiments, the present invention
According to Ming, a strip-shaped steel plate is bent to form a rectangular frame,
Reinforcing member by connecting flanges adjacent to weak corners
Switch mechanism, outlet mount and
Since the frame is constructed by fixing the cutter mechanism fixing base,
Frames of various sizes, with unlimited body depth
Can be easily handled with a simple mold, which reduces the manufacturing cost.
The shutter opening / closing mechanism
Firmly attached compared to fixing directly to a weak frame
The shutter opens and closes smoothly, and the strength of the frame is also supplemented.
Equal to or better than conventional products without the use of strong dedicated members
It is possible to provide a ventilation fan that can be secured .

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a frame of a ventilation fan according to an embodiment of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a plan view of the same.

FIG. 4 is an exploded perspective view of a frame of a conventional ventilation fan.

[Explanation of symbols]

 1 Frame 1b Flange 2 Motor fixing leg 3 Switch mechanism 4 Outlet mount 5 Shutter mechanism fixing

Claims (1)

[Claims] 1. A strip-shaped steel plate is bent to form a quadrangular frame having an indoor side opening and an outdoor side opening, and extends outward on each of four sides of an opening end of the indoor side opening. It has a flange part that opens and the shutter provided in the switch mechanism, the outlet mount and the outdoor opening is opened and closed in a shape that connects the flange parts adjacent to each other at three corners .
A shutter mechanism fixing base for fixing the opening and closing mechanism of the shutter is fixed that comprises a frame provided with a motor fixing leg therein, before
Switch mechanism, outlet mount and shutter mechanism fixed
A ventilation fan with a structure that doubles as a frame reinforcing member .