JPH0771172A - Ventilation fan structure - Google Patents

Abstract

PURPOSE:To facilitate execution of constructing a hood and prevent a counter- wind from blowing in by installing the hood through an insert part on the outdoor side of a wall hole where a ventilation fan is mounted, and pivoting a shutter on a horizontal shaft in the upper part of the hood. CONSTITUTION:A ventilation fan 7 is installed on the indoor side of an exterior wall 1, and a hood 13 is mounted in such a way of enclosing a hole 5 provided on the outdoor side, and the top of a shutter 12 is pivoted on a horizontal rotary shaft 23. The mounting of the hood 13 is made by inserting an insert part 25 provided thereon into a part to accept insertion 22 provided on a mounting frame 11. When the ventilation fan 7 is at a standstill, the shutter 12 dangles by its deadweight to shut the hole 5, so that the counter-wind does not blow indoors from the outside. When the fan 7 is in operation, the shutter 12 is rotated by the wind pressure round the shaft 23, so that the hole 5 is opened to allow performing of the ventilation. This precludes the counter-wind from outdoors from intruding into the room, and also the hood can be installed easily.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation fan structure.

[0002]

2. Description of the Related Art In a conventional ventilation fan structure, a ventilation fan is attached to the indoor side of the hole provided in the outer wall, and a hood is attached to the outer surface of the outer wall so as to cover the outdoor side of the hole.

[0003]

However, there is a problem that the back wind from the outdoor side is blown into the room through the holes in the hood and the outer wall. Moreover, it was not easy to attach the hood. Therefore, an object of the present invention is to provide a ventilation fan structure capable of preventing back wind from the outside from blowing into the room and easily attaching the hood.

[0004]

In the ventilation fan structure of the present invention, the ventilation fan is attached to the indoor side of the hole provided in the outer wall, and the hood is attached to the outer surface of the outer wall so as to cover the outdoor side of the hole. In the ventilation fan structure, a shutter arranged in the hood and capable of opening and closing the hole is rotatably attached about a rotation shaft horizontally arranged above the hole. .

A ventilation fan structure according to a second aspect of the present invention is the ventilation fan structure according to the first aspect, in which a mounting frame is provided around a hole on the outer surface of the outer wall, and the insertion portion is opened on both sides of the mounting frame upward and sideward. And the insertion portions to be inserted into the insertion portion are formed on both sides of the hood.

[0006]

According to the structure of the present invention, when the ventilation fan is stopped,
The shutter hangs down due to its own weight and the shutter is closed. Therefore, the back wind from the outdoor side does not blow into the room through the hole from the hood. During operation of the ventilation fan, the shutter is rotated about the rotation axis by the wind pressure of the ventilation fan. This opens the holes and allows ventilation.

According to the structure of claim 2, the hood can be easily attached by inserting the insertion portion of the hood into the insertion portion of the attachment frame.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A ventilation fan structure according to an embodiment of the present invention will be described with reference to FIGS. An outer wall 1 has an interior material 2 and an exterior material 3 attached to both sides of a frame (not shown). The interior material 2 and the exterior material 3 are concentrically provided with holes 4 and 5, and a ventilation fan 7 is attached to these holes 4 and 5 through a base pipe 6. Further, a hood 13 is attached to the outer surface of the exterior material 3 so as to cover the hole 5 of the exterior material 3, and a shutter 12 capable of opening and closing the hole 5 is arranged in the hood 13.

Specifically, a mounting frame 11 is mounted around the hole 5 of the exterior material 3. As shown in FIG. 4, the mounting frame 11 has an opening portion 29 corresponding to the hole 5, and insertion portions 22, 22 which are open on both sides are formed on both sides. In this case, as shown in FIG. 3, the plugged portion 22 has a shape in which it is bent in a substantially U shape and the end portion thereof is bent at a right angle, and the plugged portion 25, which will be described later, has a substantially L shape.
As a space part of the shape. Further, the rotary shaft 23 is horizontally mounted at a position corresponding to the upper portion of the hole 5 of the plugged-in portion 22. The rotating shaft 23 is connected to the upper end of the shutter 12, whereby the shutter 12 becomes rotatable about the rotating shaft 23 as an axis and the hole 5 can be opened and closed. A fixing tool 24 such as a screw fixes the mounting frame 11 to the exterior material 3.

The hood 13 is, as shown in FIG.
It opens downward and the side surface 13a is curved. The upper surface 13b is inclined downward from the exterior material 3 for drainage, and a drain port 14 is formed between the upper surface 13b and the side surface 13a. Further, as shown in FIG. 3, insertion portions 25 bent in an L shape are formed on both sides of the hood 13 and are inserted into the insertion portions 22 of the mounting frame 11. In the inserted state, the portion of the insertion portion 25 that comes into contact with the exterior material 3 is pressed by the elasticity of the insertion portion 22. Also, the upper surface 13b of the hood 13
Is positioned by hitting the upper end of the mounting frame 11. Reference numeral 16 denotes a special rivet, which has a structure as shown in FIG. 6, and the shaft 16a is pulled out from the cylinder 16b so that both sides in the side surface 13a of the hood 13 are fixed together with the mounting frame 11. Accordingly, when the side surface 13a is curved, the fixing position can be fixed even in a narrow space where it is difficult to operate with a tool such as a screwdriver. Reference numeral 26 denotes a caulking material, which is provided in a gap between the hood 13 and the exterior material 3 and a gap between the mounting frame 11 and the exterior material 3.

The base pipe 6 is composed of a pipe portion 6a fitted in the holes 4 and 5 and an outer flange portion 6b provided at one end of the pipe portion 6a. Then, a plurality of base bars 8 made of piece material are previously interposed between the interior material 2 and the exterior material 3 around the holes 4 and 5, and the pipe portion 6a of the base pipe 6 is inserted from the hole 4 of the interior material 2. Then, the outer flange portion 6b is brought into contact with the outer surface of the interior material 3 and is fixed to the base rail 8 by a fixing tool 15. In this state, the attachment portion 7b of the ventilation fan 7 is fitted and attached to the pipe portion 6a of the base pipe 6.

Next, the operation will be described. When the ventilation fan 7 is stopped, as shown by the solid line in FIG. 1, the shutter 12 has the hanging hole 5 closed due to its own weight. Therefore, the back wind from the outdoor side does not blow into the room from the hood 13 through the hole 5. When the ventilation fan 7 is operating, the shutter 12 is rotated by the wind pressure of the ventilation fan 7 as shown by the two-dot chain line.
Rotate with 3 as the axis. As a result, the hole 5 is opened and ventilation is possible.

According to this embodiment, the shutter 12 does not blow the back wind from the outdoor side into the indoor space as described above. By inserting the inserting portion 25 of the hood 13 into the inserted portion 22 of the mounting frame 11, the hood 13 can be easily attached. The plugged portion 22 and the plugged portion 25 may have shapes other than the above.

[0014]

According to the ventilation fan structure of the present invention, when the ventilation fan is stopped, the shutter is in a closed state due to its own weight. Therefore, the back wind from the outdoor side does not blow into the room through the hole from the hood. During operation of the ventilation fan, the shutter is rotated about the rotation axis by the wind pressure of the ventilation fan. This opens the holes and allows ventilation.

According to the structure of claim 2, the hood can be easily attached by inserting the insertion portion of the hood into the insertion portion of the attachment frame.

[Brief description of drawings]

FIG. 1 is a sectional side view of an embodiment of the present invention.

FIG. 2 is a front view thereof.

FIG. 3 is a sectional plan view thereof.

FIG. 4 is a perspective view of a mounting frame.

FIG. 5 is an explanatory view of attaching the hood.

FIG. 6 is an enlarged cross-sectional view of a portion A of FIG.

[Explanation of symbols]

 1 Outer Wall 4, 5 Holes 7 Ventilation Fan 11 Mounting Frame 12 Shutter 13 Hood 22 Inserted Part 23 Rotating Shaft 25 Insert Part

Claims (2)

[Claims] 1. A ventilation fan structure in which a ventilation fan is attached to an indoor side of a hole provided in an outer wall, and a hood is attached to an outer surface of the outer wall so as to cover an outdoor side of the hole, the ventilation fan structure being disposed in the hood. A ventilating fan structure, characterized in that a shutter capable of opening and closing a hole is attached rotatably around a rotation shaft horizontally arranged above the hole. 2. A mounting frame is provided around the hole on the outer surface of the outer wall,
2. The ventilation fan structure according to claim 1, wherein plugged portions that open upward and sideways are formed on both sides of the mounting frame, and plugged portions that are inserted into the plugged portions are formed on both sides of the hood.