JP3248656B2 - Shutter device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shutter device in which a shutter is opened by wind pressure.

[0002]

2. Description of the Related Art Conventionally, for example, a ventilation fan for a duct is provided with a cylindrical ventilation port for connecting a duct to an exhaust port portion of a main body frame in which a blower is provided, and the ventilation port is formed of a thin plate. A shutter is pivotally supported so as to be rotatable, and the shutter is rotated and opened by pressure of wind discharged from the inside of the main body frame through the exhaust port and the ventilation port in order.

FIGS. 12 to 14 show a conventional structure of this type. A flat shutter 2 is disposed in a cylindrical ventilation opening 1, and a support 3, a support shaft 4, and an outer tube 5 are provided.
The shutter 2 is pivoted upward and opened by the pressure of the wind discharged as shown by an arrow A from the inside of the main body frame (not shown) through the inside of the ventilation opening 1 as shown in FIG. It has become. FIGS. 13 and 14 also show a stopper 6 for preventing the shutter 2 that has returned to the closed state from opening due to the back wind due to the exhausted air from the inside of the main body frame.

[0004]

In the case of the prior art, the shutter 2 has a flat plate shape and is located at an intermediate portion of the ventilation opening 1 at the time of opening, although it is located at an intermediate portion. This has led to problems such as a decrease and an increase in noise.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is therefore an object of the present invention to provide a shutter which, when opened, does not obstruct the exhaust air, thereby increasing the exhaust air volume and reducing the noise. It is an object of the present invention to provide a shutter device.

[0006]

In order to achieve the above object, in the shutter device according to the present invention, the shutter device is opened into a cylindrical or substantially cylindrical ventilation opening by the pressure of the wind passing through the ventilation opening. With a shutter that pivots
The shutter is formed in a curved shape along the inner surface of the ventilation opening when opened.

In this case, when the ventilation opening has a tapered tapered portion, the portion of the shutter which is located ahead of the tapered portion when the shutter is opened is set at an angle equivalent to the taper angle of the tapered portion or substantially equal to or greater than the taper angle. It is good to form by expanding the angle.
Further, it is preferable that a shaft for pivotal support is formed integrally with the shutter.

Further, a shutter support having a hook portion at a distal end portion is provided in a ventilation opening body, and a mounting hole is formed in the shutter, and the mounting hole is engaged with a hook portion of the shutter support to thereby provide a shutter. It is good to pivot. A cover plate may be provided at the entrance side of the ventilation opening body to cover a portion from the entrance side edge of the ventilation opening body to the entrance side edge of the shutter in an open state.

[0009]

According to the above-described means, the shutter is curved and located along the inner surface of the ventilation opening when it is opened, so that it does not obstruct the exhaust air.

Further, the vent opening has a tapered portion, and a portion of the shutter which is located ahead of the tapered portion when the shutter is opened is formed at an angle corresponding to the taper angle of the tapered portion or substantially equal to or larger than the taper angle. When the shutter is formed so as to be expanded, it is possible to prevent the shutter from obstructing the exhaust air not only in the tapered portion of the ventilation port body but also in a portion located ahead of the tapered portion.

On the other hand, when the pivot shaft is integrally formed with the shutter, the number of parts and the number of assembling steps can be reduced. Further, a shutter support having a hook portion at a distal end portion is provided in the ventilation opening body, a mounting hole is formed in the shutter, and the mounting hole is engaged with the hook portion of the shutter support to pivot the shutter. In this case, the number of parts and the number of assembly steps can be reduced.

A cover plate is provided at the entrance side of the ventilation opening so as to cover a portion from the entrance side edge of the ventilation opening to the entrance side edge of the shutter in an open state. It is possible to prevent the exhaust air from entering between the airflow and the inner surface of the ventilation opening body, so that the generation of noise can be further reduced.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment in which the present invention is applied to a shutter device of a ventilation fan for a duct will be described below with reference to FIGS. First, Fig. 3 shows the main frame 1 of the ventilation fan for ducts.
1 is mounted on a ceiling 13 of a room 12 via a wooden frame 14 and a mounting plate 15. A blower 18 including a motor 16 and a blower blade 17 driven by the motor 16 is provided in the main body frame 11.
A partition plate 20 having an intake port 19 facing the blower blade 17 is also provided.

An exhaust port 21 is formed in the upper part of the right side wall of the main body frame 11 (portion facing the blower blade 17), and a ventilation hole 22 is formed in a portion of the mounting plate 15 which coincides with the exhaust port 21. Is formed, and a ventilation port 23 is attached to the outer surface of the ventilation hole 22. As shown in detail in FIG. 4, the ventilation opening 23 has a cylindrical shape and also has a tapered shape.

At the upper part in the ventilation opening 23, a mounting plate 1 is provided.
A shutter support 24 composed of a tongue protruding from both side edges of the ventilation hole 22 is positioned, and a shaft support hole 25 is formed at each end of the shutter support 24. In contrast, the shutter 26 has a thickness of, for example, 0.5 to 1.0.
[Mm] plastic or 0.1 to 0.5 thick
[Mm] made of a thin metal plate,
Is formed in a circular shape with a curvature along the inner surface of the shaft insertion hole.
Is formed.

In this configuration, the shutter 26 is supported by the supported piece 29.
The shaft insertion hole 28 is made to match the shaft support hole 25 of the shutter support 24, and the support shaft 31 covered with the outer tube 30 is further placed thereon.
The shutter 26 is vertically pivotally supported in the ventilation opening 23 by inserting both ends thereof through the shaft insertion hole 28 of the supported piece 29 into the shaft support hole 25 of the shutter support 24 while bending. are doing.

In this case, the shutter 26 is attached to a shutter support 24 projecting from the mounting plate 15 before the ventilation port 23 is attached, and thereafter the ventilation port 23 is enclosed so as to surround the shutter 26. May be attached to the attachment plate 15. A ventilation duct 32 is connected to the ventilation opening 23 as shown in FIG. Further, a stopper 33 protruding from the lower edge of the ventilation hole 22 of the mounting plate 15 is also located on the ventilation opening 23 to prevent the shutter 26 from being opened by the back wind from outside facing the ventilation duct 32. .

With the above configuration, the blower blades 17 of the blower 18
During the exhaust operation in which the motor 16 is driven to rotate by the motor 16, the blower blades 17 allow the air sucked from the room 12 through the intake port 19 of the partition plate 20 to pass through the ventilation port 22 of the mounting plate 15 from the exhaust port 21 of the main body frame 11. By discharging the air, the wind passing through the inside of the ventilation port body 23 is generated, and the pressure of the wind causes the shutter 26 to rotate upward around the support shaft 31 and open. Then, in this state, the wind that has passed through the ventilation opening 23 is further discharged outside through the ventilation duct 32.

FIGS. 1 and 2 show the shutter 26 at this time.
The shutter 26 is located along the inner surface of the ventilation opening 23 in a curved shape and does not hinder the exhaust air. Therefore, the amount of exhaust air can be increased, and noise can be reduced.

FIG. 5 shows a second embodiment of the present invention, in which a ventilation opening 34 instead of the ventilation opening 23 is provided.
It has a tapered portion 34a and a straight portion 34b in front of it, and a curved shutter 35 instead of the shutter 26 is provided on the inner surface of the tapered portion 34a of the ventilation opening 34 when opened. Straight portion 34b ahead of portion 35a along
A portion 35b along the inner surface of the tapered portion is formed by expanding an angle α corresponding to the taper angle of the tapered portion 34a.

In this embodiment, the shutter 35 can be prevented from obstructing the exhaust air not only in the tapered portion 34a of the ventilation port body 34 but also in a portion located ahead of the tapered portion 34a. The effect of increasing noise and reducing noise can be obtained more reliably. In this case,
The forward portion 35b of the shutter 35 is formed by expanding the taper angle of the tapered portion 34a of the ventilation opening body 34 to be slightly larger or smaller than the taper portion 34a. However, the same operation and effect can be obtained. Further, the ventilation port body 34 has a tapered portion 34.
a, but not necessarily the straight portion 34b.

FIG. 6 shows a third embodiment of the present invention.
This shows a configuration in which a shutter 37 integrally formed with a shaft portion 36 is used. The shaft portion 36 is inserted into the shaft support hole 25 of the shutter support 24 by bending both ends thereof while bending. The shutter 37 pivotally supports the shutter 37 in a vertically rotatable manner, and replaces the support shaft 31 and the outer tube 30. By doing so, the number of components and the number of assembly steps can be reduced.

FIGS. 7 and 8 show a fourth embodiment of the present invention, in which a shutter support 39 having a hook portion 38 at the tip is provided in a ventilation opening 23, and a mounting hole 41 is provided in the shutter 40. FIG. The mounting hole 41 is formed in the shutter support 39
By engaging with the hook portion 38 of the
Is shown, the number of parts and the number of assembling steps can be reduced. Also, in this case, by using only one shutter support 39, it is possible to prevent the shutter support 39 from hindering the exhaust air, so that the effect of increasing the exhaust air volume and reducing the noise can be more reliably achieved. Obtainable.

FIG. 9 to FIG. 11 show a fifth embodiment of the present invention.
A cover plate 4 that covers a portion from the entrance side edge 23a of the ventilation opening body 23 to the entrance side edge 42a of the shutter 42 in an open state.
3 shows that the exhaust air can be prevented from entering between the shutter 42 and the inner surface of the ventilation opening 23 when the shutter 42 is opened, thereby generating noise. Can be further reduced. In this case, the cover plate 43 has a shaft support hole 44 at both ends.
The shutter 42 has the fitting projections 45 on both sides
4 and are pivotally supported. Therefore, even in this case, the number of parts and the number of assembling steps can be reduced.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments.
The ventilation port body may be substantially cylindrical, such as an elliptical or polygonal cross section, instead of a cylinder. In addition, the shutter device as a whole is mounted on a ventilation device represented by the above-described ventilation fan for a duct. The invention is not limited thereto, and may be used as a single unit, for example, as a vent cap. Further, the ventilation fan for the duct is not provided with a mounting plate, the ventilation opening is directly mounted on the main body frame, and the shutter support is also provided on the main body. The present invention may be appropriately changed and implemented without departing from the gist, for example, it may be protruded from the frame.

[0026]

The shutter device of the present invention is as described above, and has the following effects. First, when a shutter which is opened by the pressure of the wind passing through the ventilation port inside a cylindrical or substantially cylindrical ventilation port is pivotally supported, the inner surface of the ventilation port is opened when the shutter is opened. , It is possible to prevent the shutter at the time of opening from obstructing the exhaust air, and to obtain the effect of increasing the amount of exhaust air and reducing noise.

Secondly, the ventilation opening has a tapered portion, and a portion of the shutter which is located ahead of the tapered portion when the shutter is opened is set to an angle corresponding to the taper angle of the taper portion or more than the taper angle. And the shutter is prevented from hindering the exhaust air not only in the tapered portion of the ventilation opening body but also in the portion located ahead of the tapered portion, thereby increasing the exhaust air volume and noise. Can be more reliably obtained.

Third, since the pivotal shaft is integrally formed with the shutter, the number of parts and the number of assembly steps can be reduced.

Fourthly, a shutter support having a hook at its tip is provided in the ventilation opening inside the ventilation opening, and a mounting hole is formed in the shutter. As described above, the number of parts and the number of assembling steps can be reduced by pivotally supporting the shutter.

Fifth, a shutter plate is provided at the entrance side of the ventilation opening so as to cover a portion from the entrance side edge of the ventilation opening to the entrance side edge of the shutter in an open state. When the shutter is opened, it is possible to prevent the exhaust air from entering between the shutter and the inner surface of the ventilation opening body, and it is possible to further reduce the generation of noise.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part showing a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional front view of a main part.

FIG. 3 is a longitudinal sectional view showing a state in which a ventilation fan for a duct is mounted.

FIG. 4 is an exploded perspective view of a main part.

FIG. 5 is a longitudinal sectional side view of a main part showing a second embodiment of the present invention.

FIG. 6 is a view corresponding to FIG. 4 showing a third embodiment of the present invention;

FIG. 7 shows a fourth embodiment of the present invention, and is a view corresponding to the fracture in FIG.

FIG. 8 is a view corresponding to FIG. 5;

FIG. 9 is a view corresponding to FIG. 5, showing a fifth embodiment of the present invention.

FIG. 10 is a view corresponding to FIG. 2;

FIG. 11 is a perspective view of a cover plate portion.

FIG. 12 is a perspective view of a main part showing a conventional example.

FIG. 13 is a diagram corresponding to FIG. 4;

FIG. 14 is a diagram corresponding to FIG. 5;

[Explanation of symbols]

23 is a ventilation opening body, 23a is an entrance side edge of the ventilation opening body, 26
Is a shutter, 31 is a support shaft, 34 is an air vent, 35 is a shutter, 36 is a shaft, 37 is a shutter, 38 is a hook,
Reference numeral 39 denotes a shutter support, 40 denotes a shutter, 41 denotes a mounting hole, 42a denotes an entrance side edge of the shutter in an open state, and 43 denotes a cover plate.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Yuji Hashimoto 991 Anada-cho, Seto-shi, Aichi Prefecture Inside the Aichi Plant, Toshiba Corporation (56) References JP-A-4-85042 (JP, A) Shokai 58-47033 (JP, U) Shokai 55-1444928 (JP, U) Shokai 3-77139 (JP, U) Shokai 2-43571 (JP, U) (58) Field surveyed (Int. Cl. ⁷⁾ , DB name) F24F 7/10 101 F24F 13/10

Claims (5)

(57) [Claims] Claims: 1. A cylindrical or nearly cylindrical ventilation opening,
A shutter device pivotally supporting a shutter which is opened by the pressure of wind passing through the ventilation opening, wherein the shutter is formed in a curved shape along the inner surface of the ventilation opening when opened. 2. A vent opening body having a tapered portion having a tapered portion, and a portion of the shutter which is located ahead of the tapered portion when the shutter is opened is expanded at an angle corresponding to the taper angle of the tapered portion or substantially equal to the taper angle. The shutter device according to claim 1, wherein the shutter device is formed by being opened. 3. The shutter device according to claim 1, wherein a shaft for pivotal support is formed integrally with the shutter. 4. A shutter support having a hook portion at a distal end portion is provided in a ventilation opening body, a mounting hole is formed in the shutter, and the mounting hole is engaged with a hook portion of the shutter support to thereby provide a shutter. The shutter device according to claim 1, wherein the shutter device is pivotally supported. 5. A cover plate is provided at an inlet side portion of the ventilation opening body so as to cover a portion from an entrance side edge of the ventilation opening body to an entrance side edge portion of an open shutter. 2. The shutter device according to 1.