AU2018271249B2

AU2018271249B2 - Ventilation apparatus

Info

Publication number: AU2018271249B2
Application number: AU2018271249A
Authority: AU
Inventors: Shotaro KUDO
Original assignee: Sahara KK
Current assignee: Sahara KK
Priority date: 2018-05-21
Filing date: 2018-11-26
Publication date: 2020-04-16
Anticipated expiration: 2038-11-26
Also published as: JP7100881B2; AU2018271249A1; JP2019203613A

Abstract

A ventilation apparatus including a vertical frame of a window frame and a ventilation structure disposed in the vertical frame. The vertical frame 10 includes a main portion extending in a longitudinal direction of the vertical frame and having a hollow closed cross-sectional configuration. The main portion includes an outdoor side wall portion a and an indoor side wall portion. The ventilation structure includes outdoor side ventilation openings formed in the outdoor side wall portion, indoor side ventilation openings formed in the indoor side wall portion and disposed above the outdoor side ventilation openings and a shutter plate. The shutter plate is disposed in an inner space of the main portion at a location between the outdoor side ventilation openings and the indoor side ventilation openings, and the shutter plate is rotatably supported by the main portion. When a wind pressure is not strong, the shutter plate allows for airflow through the inner space and when a wind pressure is strong, the shutter plate is rotated to shut off the airflow by the wind pressure. 91~ 11d 11 11a 13 121 10 18 -- 16 11c 31 30 31y 31b -41 45a 19 32 47 5 40 45b FIG. 5

Description

11d 11 11a 13

121

18

-- 16

31 30 11c

31y

31b

-41 45a 19 32

47 5 40 45b

FIG. 5

VENTILATION APPARATUS FIELD OF THE INVENTION

[0001]

The present invention relates to a ventilation apparatus mounted in a frame for a

window.

BACKGROUND ART DISCUSSION

[0002]

It is well known in the art to install a ventilation structure in a frame member

constituting a part of an opening frame that rims an opening of a wall or a part of a

window frame of a sash window slidably supported by or fixedly mounted in the

opening frame.

One type of the ventilation structure simply has a ventilation passage formed

in the frame member to allow for natural ventilation. Another type of the ventilation

structure has a manual ventilation control device incorporated in the frame member.

[0003]

In the natural ventilation, rain water may blow indoors when wind and rain

are strong.

In a case where a manual ventilation control device is incorporated, a trouble

of manually closing a ventilation passage of the ventilation control device is required

when wind and rain are strong. As with the natural ventilation, the rain water may

blow indoors if the wind and rain become strong while a room is unmanned with the

ventilation passage left open.

[0004]

Patent Documents 1 and 2 to be described later disclose mounting a

ventilation control device on an indoor side of a frame member and rotatably

disposing a shutter plate on an outdoor side of the frame member. When wind and

rain are strong, the shutter plate is rotated by a wind pressure to close a ventilation passage, thereby overcoming the problems associated with the two types of ventilation structures mentioned above.

PRIOR ART DOCUMENT PATENT DOCUMENT

[0005]

[Patent Document 1] International Patent Application Publication No.

W02015/198416

[Patent Document 2] Japanese Unexamined Patent Application Publication

No. 2016-217642

[Patent Document 3] Japanese Unexamined Patent Application Publication

No. 2006-328802

SUMMARY OF THE INVENTION

[0006]

In the ventilation apparatus of Patent Documents 1 and 2, since the

ventilation passage is formed such that the air flows in a direction orthogonal to the

frame member and the shutter plate is disposed in the ventilation passage, a cross

sectional area of the frame member is increased. Moreover, in the Patent Documents

1 and 2, since the ventilation control device is disposed alongside the shutter plate in

the direction orthogonal to the frame member, the cross sectional area of the frame

member is further increased.

In the ventilation apparatus of Patent Documents 3, as with the present invention, a

frame member has an outdoor side ventilation opening and an indoor side ventilation

opening formed therein. The outdoor side ventilation opening and the indoor side

ventilation opening are spaced from each other in a longitudinal direction of the

frame member. Accordingly, an air from the outdoor side ventilation opening flows

indoors from the indoor side ventilation opening through an inner space of the frame

1) member. The ventilation apparatus includes a ventilation control device for opening and closing the inner space. However, Patent Document 3 fails to disclose a shutter plate actuated by a wind pressure.

[0007]

To solve the problems mentioned above, the present invention provides a

ventilation apparatus including: a frame member constituting a part of a frame for a

window extending in a linear fashion; and a ventilation structure disposed in the

frame member, the frame member including: a main portion extending in a

longitudinal direction of the frame member and having a hollow closed cross

sectional configuration, the main portion including an outdoor side wall portion and

an indoor side wall portion, the ventilation structure including: an outdoor side

ventilation opening formed in the outdoor side wall portion; an indoor side ventilation

opening formed in the indoor side wall portion, the indoor side ventilation opening

spaced from the outdoor side ventilation opening in the longitudinal direction of the

frame member; and a shutter plate disposed in an inner space of the main portion at a

location between the outdoor side ventilation opening and the indoor side ventilation

opening, the shutter plate rotatably supported by the main portion, wherein when a

wind pressure is not strong, the shutter plate allows for airflow through the inner

space of the main portion, and when the wind pressure is strong, the shutter plate is

rotated to shut off the airflow by the wind pressure.

[0008]

According to the features mentioned above, the shutter plate shuts off the

airflow through the inner space of the main portion of the frame member when wind

and rain are strong, and thereby, rain water can be prevented from blowing indoors.

Moreover, since the inner space of the main portion of the frame member extending

in the longitudinal direction serves as a ventilation passage and the shatter plate is

disposed in the ventilation passage, a cross-sectional area of the frame member is not

increased.

[0009]

Preferably, the shutter plate includes a first portion located closer to the

outdoor side ventilation opening with respect to a rotational axis thereof and a second

portion located closer to the indoor side ventilation opening, the first portion being

longer than the second portion, when the wind pressure is not strong, an attitude of

the shutter plate is maintained along the longitudinal direction of the frame member

by an attitude maintaining means, thereby the shutter plate allowing for the airflow

through the inner space of the main portion, and when the wind pressure is strong, the

shutter plate is rotated by the wind pressure against the attitude maintaining means,

thereby the shutter plate shutting off the airflow.

According to the features mentioned above, since the shutter plate in the

attitude along the longitudinal direction of the frame member allows for the airflow,

the air can flow in a smooth manner. Moreover, due to a difference in pressure

receiving areas between the first portion and the second portion, the shutter plate can

be surely rotated to shut off the airflow.

[0010]

Preferably, the attitude maintaining means includes a spring and a stopper,

the spring rotationally biasing the shutter plate, the stopper limiting the rotation of the

shutter plate in a biasing direction of the spring.

According to the features mentioned above, the shutter plate can be securely

maintained at the attitude in which it allows for the airflow. Moreover, the spring

allows for an appropriate setting of the wind pressure at which the shutter plate is

rotated to shut off the airflow.

[0011]

Preferably, the ventilation apparatus further includes a shutter unit, the

shutter unit including a unit body disposed in the inner space of the main portion, the

shutter plate rotationally supported by the unit body, the spring and the stopper both

disposed in the unit body.

According to the features mentioned above, since the prefabricated shutter

unit is mounted in the frame member, an installation work of the shutter plate, the spring and the stopper can be simplified.

[0012]

Preferably, a mounting opening is formed in the indoor side wall portion of

the main portion at a location between the outdoor side ventilation opening and the

indoor side ventilation opening, a flange portion is formed on an indoor side of the

unit body, and the shutter unit is disposed in the inner space of the main portion in a

state in which the unit body is inserted in the mounting opening and the flange

portion is fixed to the indoor side wall portion.

According to the features mentioned above, the mounting work of the shutter

unit can be further simplified.

[0013]

Preferably, the main portion includes the outdoor side wall portion and the

indoor side wall portion, the main portion further including a first wall portion and a

second wall portion, the first wall portion and the second wall portion opposed to

each other in a direction orthogonal to the longitudinal direction of the frame member

and an indoor-outdoor direction, the main portion has a rectangular cross-sectional

configuration elongated in the direction in which the first wall portion and the second

wall portion are opposed to each other, a protrusion is formed in the indoor side wall

portion at a location close to the first wall portion, the protrusion protruded into a

room, the mounting opening is formed in the indoor side wall portion in a region in

which the protrusion is not formed, the unit body has a cylindrical configuration

having a rectangular cross-section, the unit body disposed close to the second wall

portion and distanced from the first wall portion, the unit body including an opening

faced to the first wall portion, and when the shutter plate is rotated in a closing

direction, the first portion is protruded through the opening and abutted against the

first wall portion.

According to the features mentioned above, although the shutter unit is

disposed close to the second wall portion and distanced from the first wall portion, the airflow can be shut off by the first portion of the shutter plate's being protruded

from the opening of the unit body and abutted against the first wall portion.

[0014]

Preferably, the frame member is a vertical frame extending in a vertical

direction, and the indoor side ventilation opening is disposed above the outdoor side

ventilation opening.

According to the features mentioned above, in a state in which the shutter

plate shuts off the airflow, the rain water from the outdoor side ventilation opening

can be prevented from flowing along a wall of the main portion toward the shutter

plate by the action of the gravity.

[0015]

Preferably, a ventilation control device is disposed in the indoor side wall

portion of the main portion, the ventilation control device controlling the airflow

through the indoor side ventilation opening.

According to the features mentioned above, the ventilation control device

helps to realize optimal ventilation. Moreover, since the ventilation control device

and the shutter plate are disposed spaced from each other in the longitudinal direction

of the frame member, the cross-sectional area of the frame member is not increased.

[0016] Preferably, the frame member includes a receiving space extending in the

longitudinal direction of the frame member, the receiving space disposed on the

indoor side with respect to the main portion and being open to indoors, the ventilation

control device disposed in the receiving space, the receiving space is covered with a

covering member extending in the longitudinal direction of the frame member, an

operation opening is formed in the covering member at a location corresponding to an

operation knob of the ventilation control device, and an auxiliary ventilation opening is formed in the covering member at a location corresponding to the indoor side ventilation opening.

According to the features mentioned above, a good appearance can be

maintained by covering the receiving space of the frame member and the ventilation

control device with the covering member.

[0017] According to the present invention, the rain water can be prevented from

blowing indoors when wind and rain are strong and an increase in the cross-sectional

area of the frame member of the frame for the window can be constrained.

BRIEF DESCRIPTION OF THE DRAWINGS

[0018]

FIG. 1A is a front view of a window including a ventilation apparatus

according to one embodiment of the present invention viewed from an indoor side,

shown with a covering member mounted thereon.

FIG. 1B is a front view of the window including the ventilation apparatus

viewed from the indoor side, shown without the covering member.

FIG. 2 is a rear view of the window viewed from an outdoor side.

FIG. 3 is a cross-sectional view taken along line III-III of FIG. 1A.

FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 1A.

FIG. 5 is a perspective view showing a vertical frame, a ventilation control

device and a shutter unit constituting the ventilation apparatus in a separate state.

FIG. 6 is a longitudinal sectional view of a main portion of the ventilation

control device.

FIG. 7 is a transverse sectional view of a middle portion of the covering

member.

FIG. 8 is a partially exploded perspective view of the shutter unit.

FIG. 9 is a perspective view of the shutter unit.

FIG. 10 is a perspective view of the shutter unit, showing a shutter plate

rotated against a spring.

FIG. 11 is a longitudinal sectional view of the shutter unit in the vertical

frame in a state in which an outdoor wind pressure is not strong and the shutter plate

allows for airflow.

FIG. 12 is a longitudinal sectional view of the shutter unit in the vertical

frame in a state in which the outdoor wind pressure is strong and the shutter plate is

rotated to shut off the airflow.

DETAILED DESCRIPTION OF THE DRAWINGS

[0019]

One embodiment of the present invention will be described hereinafter with

reference to drawings. As shown in FIGS. 1 to 3, an opening la having a rectangular

configuration formed in a wall 1 of a building is rimmed by an opening frame 2. A

sash window 3 is secured to the opening frame 2 in a fixed manner.

[0020]

The opening frame 2 includes an upper frame 2a, a lower frame 2b and left

and right vertical frames 2c, 2d made of an extrusion molded material of aluminum

alloy. The sash window 3 includes a window frame 4 having a rectangular

configuration and a glass plate 5 fixed to the window frame 4. As with the opening

frame 2, the window frame 4 also includes an upper frame 4a, a lower frame 4b and

left and right vertical frames 4c, 4d made of an extrusion molded material of

aluminum alloy.

[0021]

The window frame 4 of this embodiment further includes an additional

vertical frame 10 (frame member) fixed along the left vertical frame 4c. A left side

portion of the vertical frame 10 is inserted in the left vertical frame 2c of the opening

frame 2.

[0022]

The vertical frame 10 is also made of an extrusion molded material of

aluminum alloy. As shown in FIG. 3, the vertical frame 10 includes a hollow main

portion 11 extending in a longitudinal direction of the vertical frame 10 and having a

rectangular closed cross-sectional configuration. The main portion 11 includes an

outdoor side wall portion 11a and an indoor side wall portion 1lb parallel to each

other. The main portion 11 further includes a first wall portion 11c and a second wall

portion I1d parallel to each other and opposed to each other in a left-right direction

(direction orthogonal to the longitudinal direction of the vertical frame 10 and an

indoor-outdoor direction). The main portion 11 includes an inner space 15 closed by

the wall portions lla, 11b, 11c, 11d.

[0023]

In this embodiment, the main portion 11 has the rectangular cross-sectional

configuration elongated in the left-right direction. The vertical frame 10 further

includes a protrusion 12 having a small rectangular cross-section and protruded into a

room from a left end portion of the indoor side wall portion 1lb of the main portion

11 and a protruded wall portion 13 protruded into the room from a right end of the

main portion 11. The protrusion 12 and the protruded wall portion 13 are extended in

the longitudinal direction of the vertical frame 10.

A receiving space 16 that is open on the indoor side is formed between the

protrusion 12 and the wall portion 13.

[0024]

The receiving space 16 of the vertical frame 10 is covered with a covering

member 20. The covering member 20 is made of an extrusion molded material of

aluminum alloy. The covering member 20 includes a pair of left and right elastic

claws 21 on a back side (surface on the outdoor side) thereof. When the covering

member 20 is pressed from the indoor side toward the receiving space 16 of the

vertical frame 10, the elastic claws 21 are moved beyond projections 12a, 13a

respectively formed in the protrusion 12 and the protruded wall portion 13, the elastic

Q claws 21 being elastically deformed and engaged with the projections 12a, 13a. The covering member 20 is mounted in the vertical frame 10 in this manner.

[0025]

In this embodiment, a ventilation structure is disposed in the vertical frame

10. A detailed description of the ventilation structure is given below.

As shown in FIGS. 1B and 2, outdoor side ventilation openings 17 are

formed in a lower end portion of the outdoor side wall portion 11a of the main portion

11 of the vertical frame 10. The outdoor side ventilation openings 17 extend in the

left-right direction. A multitude of the outdoor side ventilation openings 17 are

formed spaced from each other in a vertical direction.

[0026]

As shown in FIG. 4, a perforated metal 25 covering the outdoor side

ventilation openings 17 is disposed in an inner side of the outdoor side wall portion

11a of the main portion 11. The perforated metal 25 is supported along an inner

surface of an outdoor side plate portion of a mounting member 26 having a

cylindrical configuration with a rectangular cross-section. The perforated metal 25 is

mounted to the main portion 11 by inserting and fixing the mounting member 26 to a

lower end portion of the main portion 11.

Outdoor air is allowed to flow into the inner space 15 of the main portion 11

via the outdoor side ventilation openings 17, an opening 26a formed in the outdoor

side plate portion of the mounting member 26 and a multitude of perforations of the

perforated metal 25.

[0027]

As shown in FIG. 5, indoor side ventilation openings 18 elongated in the

vertical direction are formed in a region of the indoor side wall portion 1lb of the

main portion 11 of the vertical frame 10 in which region the protrusion 12 is not

formed. The indoor side ventilation openings 18 are disposed above the outdoor side

ventilation openings 17. The ventilation openings 17, 18 are spaced from each other

in the vertical direction (longitudinal direction of the vertical frame 10).

1n

[0028]

A ventilation control device 30 unitized to cover the indoor side ventilation openings 18 is mounted on the indoor side wall portion 1lb of the main portion 11 of

the vertical frame 10 with screws. The ventilation control device 30 is received in the

receiving space 16.

As shown in FIGS. 5 and 6, the ventilation control device 30 includes an

elongated device body 31, an operation knob 32 supported in a lower end portion of

the device body 31 so as to be rotationally operable in the vertical direction, a slider

33 slidable in the vertical direction accompanying the rotational operation of the

operation knob 32, an actuating plate 34 having a lower end thereof connected to the

slider 33 and a cam member (not shown) fixed to the device body 31. The actuating

plate 34 is supported by the device body 31 so as to be slidable in the vertical

direction and rotatable about a vertically extending rotational axis.

[0029]

Ventilation openings 31x are formed in an outdoor side wall 31a of the

device body 31 at a location facing the indoor side ventilation openings 18 of the

vertical frame 10. A multitude of ventilation openings 31y are formed in an indoor

side wall 31b of the device body 31 as shown in FIG. 5.

[0030] When the operation knob 32 is not raised as shown in FIGS. 5 and 6, the

actuating plate 34 is positioned in a vicinity of the indoor side wall 31b of the device

body 31 to close the ventilation openings 31y. Thereby, the airflow through the

indoor side ventilation openings 18 of the vertical frame 10 is shut off.

When a finger is hooked under the operation knob 32 and the operation knob

32 is rotated in a direction of arrow (indoor direction) shown in FIG. 6 so as to be

raised, the slider 33 is slid downwards and the actuating plate 34 is also slid in the

same direction. In the process of sliding, the actuating plate 34 is rotated by a

camming action of the cam member and spaced from the indoor side wall 31b of the device body 31. Thereby, the ventilation openings 31y are opened, allowing for the airflow through the indoor side ventilation openings 18.

[0031]

The covering member 20 covers the ventilation control device 30 and a

shutter unit 40 to be described later.

The covering member 20 is disposed close to the indoor side wall 3lb of the

device body 31 of the ventilation control device 30. As shown in FIG. 1A, the

covering member 20 has an operation opening 27 formed at a location corresponding

to the operation knob 32 and a multitude of auxiliary ventilation openings 28

extending in the left-right direction formed so as to be vertically spaced from one

another at locations corresponding to the ventilation openings 31y of the ventilation

control device 30.

To bring the ventilation control device 30 to an open state, insert a finger

through the operation opening 27 to raise the operation knob 32. The operation knob

32 in the raised state is protruded toward the indoor side through the operation

opening 27.

[0032]

As shown in FIG. 7, a pair of left and right support protrusions 22 having a

L-shaped cross-sectional configuration are formed on the back side of the covering

member 20. A filter 29 covering the auxiliary ventilation openings 28 is supported

between the support protrusions 22.

[0033]

As shown in FIG. 5, a mounting opening 19 is formed in a region of the

indoor side wall portion 1Ib of the main portion 11 of the vertical frame 10 in which

region the protrusion 12 is not formed at a location between the outdoor side

ventilation openings 17 and the indoor side ventilation openings 18 in the

longitudinal direction of the vertical frame 10. The shutter unit 40 is inserted through

the mounting opening 19 and disposed in the inner space 15 of the main portion 11.

[0034]

As shown in FIGS. 8 to 12, the shutter unit 40 includes a unit body 41 having

a cylindrical configuration with a rectangular cross-section. The unit body 41

includes a main plate 42 bent to have a U-shaped cross-sectional configuration,

auxiliary plates 43, 44 respectively fixed to inner surfaces of an upper end portion and

a lower end portion of the main plate 42 and a mounting plate 45 fixed to an indoor

side plate portion of the main plate 42. An opening 46 is formed between the

auxiliary plates 43, 44.

[0035]

Packings 42a, 42b are respectively attached to outer peripheries of the upper

end portion and the lower end portion of the main plate 42. The mounting plate 45 is

fixed to the indoor side plate portion of the main plate 42 via the packings 42a, 42b.

An upper end portion and a lower end portion of the mounting plate 45 are

respectively protruded upwards and downwards from the main plate 42 and provided

as flange portions 45a, 45b.

[0036]

A shutter plate 47 is rotatably supported in an inside of the unit body 41 so as

to be rotatable about a rotational axis extending in the indoor-outdoor direction.

Specifically, as shown in FIGS. 11 and 12, a bearing portion 47a having a circular

cylindrical configuration is fixed to opposite side edges of the shutter plate 47 in a

width direction (indoor-outdoor direction). The shutter plate 47 is rotatably

supported by the unit body 41 by the bearing portion 47a's being fitted to a hollow

shaft portion 48 fixed to the main plate 42.

[0037]

The shutter plate 47 includes a first portion 47x on a lower side (outdoor side

ventilation opening 17 side) with respect to the rotational axis thereof and a second

portion 47y on an upper side (indoor side ventilation opening 18 side) with respect to

the rotational axis thereof. The first portion 47x is longer than the second portion

47y.

A packing 47b is attached to a left side surface (surface on the first wall

portion 11c side) of a distal end portion of the first portion 47x. A packing 47c is

attached to a right side surface (surface on the second wall portion I1d side) of a

distal end portion of the second portion 47y.

[0038]

The shutter plate 47 is urged by a torsion coil spring 49 (spring) received in

the hollow shaft portion 48 in a counter-clockwise direction in FIGS. 11 and 12. A

coil portion of the torsion coil spring 49 is supported by a support protrusion 48a

formed in a middle portion of the shaft portion 48. One end of the torsion coil spring

49 is caught by a catch portion 48b protruded inward in a radial direction from a

circular cylindrical portion of the shaft portion 48. The other end of the torsion coil

spring 49 is caught by a catch portion 47e formed in the bearing portion 47a of the

shutter plate 47.

[0039]

Opposite end portions of the upper auxiliary plate 43 of the unit body 41 are

bent toward an inner space of the unit body 41 and are provided as stoppers 43a. A

packing 43b is attached to a right side surface of the stopper 43a.

[0040]

As shown in FIG. 5, the shutter unit 40 is received in the inner space 15 of

the main portion 11 by inserting the unit body 41 into the mounting opening 19 of the

vertical frame 10 and fixing the flange portions 45a, 45b to an indoor side surface of

the indoor side wall portion 1lb with screws. In a state in which the shutter unit 40 is

mounted, a right side plate portion of the main plate 42 is abutted against the second

wall portion 11d of the main portion 11 via the packings 42a, 42b and an outdoor side

plate portion of the main plate 42 is abutted against the outdoor side wall portion 11a

of the main portion 11 via the packings 42a, 42b. Thereby, the shutter unit 40 is

mounted to a right portion of the main portion 11 in an airtight manner on three

surfaces.

[0041]

1A

In a state in which the shutter unit 40 is mounted, the shutter unit 40 is

spaced from the first wall portion 11c of the main portion 11 with the opening 46

thereof oriented to the first wall portion 11c. The rotational axis of the shutter plate

47 is disposed at a location close to the second wall portion I1d.

[0042]

In the ventilation apparatus mentioned above, when an outdoor air pressure is

not strong, the distal end portion of the second portion 47y of the shutter plate 47 is

abutted against the stopper 43a via the packing 43b as shown in FIG. 11. Thereby,

the shutter plate 47 is prohibited from being rotated in the counter-clockwise

direction, assuming a vertical posture (along the longitudinal direction of the vertical

frame 10), allowing for the airflow through the inner space 15. Therefore, the

outdoor air can be supplied indoors via the outdoor side ventilation openings 17, the

inner space 15 of the main portion 11, the indoor side ventilation openings 18, the

ventilation openings 31x, 31y of the ventilation control device 30 and the auxiliary

ventilation openings 28 of the covering member 20.

[0043]

Normally, the ventilation is controlled by operating the operation knob 32 of

the ventilation control device 30. Specifically, if the actuating plate 34 of the

ventilation control device 30 is brought to a closing position by the operation of the

operation knob 32, the outdoor air is shut off by the actuating plate 34, thus the

ventilation is not performed. If the actuating plate 34 is brought to an opening

position, the ventilation can be performed.

[0044]

When rain and wind are strong outside, the strong wind pressure acts on the

shutter plate 47 via the outdoor side ventilation openings 17. Thereby, the shutter

plate 47 is rotated in a clockwise direction against a biasing force of the torsion coil

spring 49. By this rotation, as shown in FIG. 12, the second portion 47y of the shutter

plate 47 is moved away from the stopper 43a toward the second wall portion I1d and

the distal end portion of the second portion 47y is abutted against the right side plate

1 r- portion of the main plate 42 via the packing 47c. On the other hand, the first portion

47x of the shutter plate 47 is protruded from the opening 46 of the shutter unit 40 and

the distal end portion of the first portion 47x is abutted against the first wall portion

1Ic via the packing 47b. As a result, the airflow through the inner space 15 of the

main portion 11 can be shut off.

[0045]

Therefore, even if the room is unmanned with the actuating plate 34 left open

when the wind and rain are strong, the rain water can be prevented from flowing

indoors because the inner space 15 of the main portion 10 can be shut off by the

shutter plate 47.

[0046]

In this embodiment, since the protrusion 12 is formed in the vertical frame

10, the shutter unit 40 is disposed at the location close to the second wall portion I1d.

Nevertheless, the inner space 15 can be shut off because the shutter plate 47 is

protruded from the opening 46 of the shutter unit 40 and abutted against the first wall

portion 1Ic.

[0047]

In the present embodiment, a wind pressure at which the shutter plate 47

should be actuated to shut off can be set as appropriate by using the torsion coil

spring 49. For example, the shutter plate 47 can be actuated for shutting off at the set

wind pressure of 150 Pa to 200 Pa.

[0048]

The present invention is not limited to the embodiment described above.

Various modifications can be made without departing from the spirit of this

invention.

For example, the frame member is made of one hollow molded material in

the embodiment described above. However, the frame member may be made of a

plurality of molded materials arranged to have a hollow cross-sectional configuration

similar to that of the embodiment described above.

1A

The frame member to have the ventilation structure installed therein may be

a horizontal frame extending in the left-right direction.

While the ventilation structure is installed in the frame member of the

window frame 4 of the fixed sash window 3 in the embodiment mentioned above, the

ventilation structure may be installed in a frame member of a window frame of a

slidably disposed sash window. The ventilation structure may be installed in a frame

member of the opening frame 2.

[0049]

In a case where the shutter plate is mounted in the vertical frame, an attitude

maintaining means that maintains the attitude of the shutter plate along the vertical

frame may be the gravity only acting on the shutter plate.

The rotational axis of the shutter plate may extend in the left-right direction.

The ventilation control device may be mounted so as to fit in the indoor side

ventilation opening.

The ventilation control device may be omitted and natural ventilation may be

performed through the inner space of the main portion of the frame member.

INDUSTRIAL APPLICABILITY

[0050]

The present invention may be applied to a ventilation apparatus for indoor

ventilation.

EXPLANATION OF REFERENCE NUMERALS

[0051] 2 opening frame (frame for a window)

4 window frame (frame for a window)

vertical frame (frame member)

11 main portion

11a outdoor side wall portion

1lb indoor side wall portion

11c first wall portion

1ld second wall portion

inner space

16 receiving space

17 outdoor side ventilation opening

18 indoor side ventilation opening

19 mounting opening

covering member

27 operation opening

28 auxiliary ventilation opening

ventilation control device

32 operation knob

shutter unit

41 unit body

43a stopper

45a, 45b flange portion

47 shutter plate

47x first portion

47y second portion

49 torsion coil spring (spring)

Claims

[Claim 1] A ventilation apparatus comprising: a frame member constituting a part of a frame for a window extending in a linear fashion; and a ventilation structure disposed in the frame member, the frame member including: a main portion extending in a longitudinal direction of the frame member and having a hollow closed cross-sectional configuration, the main portion including an outdoor side wall portion and an indoor side wall portion, the ventilation structure including: an outdoor side ventilation opening formed in the outdoor side wall portion; an indoor side ventilation opening formed in the indoor side wall portion, the indoor side ventilation opening spaced from the outdoor side ventilation opening in the longitudinal direction of the frame member; and a shutter plate disposed in an inner space of the main portion at a location between the outdoor side ventilation opening and the indoor side ventilation opening, the shutter plate rotatably supported by the main portion, wherein when a wind pressure is not strong, an attitude of the shutter plate is maintained along the longitudinal direction of the frame member by an attitude maintaining means, thereby the shutter plate allows for airflow through the inner space of the main portion, and when the wind pressure is strong, the shutter plate is rotated by the wind pressure against the attitude maintaining means to shut off the airflow, wherein the shutter plate includes a first portion located closer to the outdoor side ventilation opening with respect to a rotational axis thereof and a second portion located closer to the indoor side ventilation opening in the longitudinal direction of the frame member, the first portion being longer than the second portion, wherein the attitude maintaining means includes a spring and a stopper, the spring rotationally biasing the shutter plate, the stopper limiting the rotation of the shutter plate in a biasing direction of the spring to maintain the attitude of the shutter plate along the longitudinal direction of the frame member.
[Claim 2] The ventilation apparatus according to claim 1, further comprising a shutter unit, the shutter unit including a unit body disposed in the inner space of the main portion, the shutter plate rotationally supported by the unit body, the spring and the stopper both disposed in the unit body.
[Claim 3] The ventilation apparatus according to claim 2, wherein a mounting opening is formed in the indoor side wall portion of the main portion at a location between the outdoor side ventilation opening and the indoor side ventilation opening, a flange portion is formed on an indoor side of the unit body, and the shutter unit is disposed in the inner space of the main portion in a state in which the unit body is inserted in the mounting opening and the flange portion is fixed to the indoor side wall portion.
[Claim 4] The ventilation apparatus according to claim 3, wherein the main portion includes the outdoor side wall portion and the indoor side wall portion, the main portion further including a first wall portion and a second wall portion, the first wall portion and the second wall portion opposed to each other in a direction orthogonal to the longitudinal direction of the frame member and an indoor outdoor direction, the main portion has a rectangular cross-sectional configuration elongated in the direction in which the first wall portion and the second wall portion are opposed to each other, a protrusion is formed in the indoor side wall portion at a location close to the first wall portion, the protrusion protruded into a room, the mounting opening is formed in the indoor side wall portion in a region in which the protrusion is not formed, the unit body has a cylindrical configuration having a rectangular cross section, the unit body disposed close to the second wall portion and distanced from the first wall portion, the unit body including an opening faced to the first wall portion, and when the shutter plate is rotated in a closing direction, the first portion is protruded through the opening and abutted against the first wall portion.
[Claim 5] The ventilation apparatus according to any one of claims 1 to 4, wherein the frame member is a vertical frame extending in a vertical direction, and the indoor side ventilation opening is disposed above the outdoor side ventilation opening.
[Claim 6] The ventilation device according to any one of claims 1 to 5, wherein a ventilation control device is disposed in the indoor side wall portion of the main portion, the ventilation control device controlling the airflow through the indoor side ventilation opening.
[Claim 7] The ventilation device according to claim 6, wherein the frame member includes a receiving space extending in the longitudinal direction of the frame member, the receiving space disposed on the indoor side with respect to the main portion and being open to indoors, the ventilation control device disposed in the receiving space, the receiving space is covered with a covering member extending in the longitudinal direction of the frame member, an operation opening is formed in the covering member at a location corresponding to an operation knob of the ventilation control device, and an auxiliary ventilation opening is formed in the covering member at a location corresponding to the indoor side ventilation opening.