AU2018271249B2 - Ventilation apparatus - Google Patents

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. 11d 11 11a 13 -- 16 11c 31 30 31y 31b -41 45a 45b

Description

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

2018271249 26 Nov 2018 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. WO2015/198416 [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

2018271249 26 Nov 2018 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 crosssectional 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.

2018271249 26 Nov 2018 [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.

2018271249 26 Nov 2018

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.

2018271249 26 Nov 2018

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

2018271249 26 Nov 2018 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. IB 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.

2018271249 26 Nov 2018

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]

2018271249 26 Nov 2018

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 Ila and an indoor side wall portion 11b parallel to each other. The main portion 11 further includes a first wall portion 11c and a second wall portion 1 Id 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 Ila, 11b, 11c, lid.

[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 1 lb 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

2018271249 26 Nov 2018 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. IB and 2, outdoor side ventilation openings 17 are formed in a lower end portion of the outdoor side wall portion 1 la 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 1 la 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 1 lb 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).

2018271249 26 Nov 2018 [0028]

A ventilation control device 30 unitized to cover the indoor side ventilation openings 18 is mounted on the indoor side wall portion 1 lb 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 3 lx are formed in an outdoor side wall 3 la 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 3 ly 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 3ly. 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

2018271249 26 Nov 2018 device body 31. Thereby, the ventilation openings 3ly 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 31b 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 3 ly 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 1 lb 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]

2018271249 26 Nov 2018

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.

2018271249 26 Nov 2018

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 lid 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 43 a. [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 1 lb 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 1 Id 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 Ila 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]

2018271249 26 Nov 2018

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 lid. [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 3 lx, 3 ly 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 lid and the distal end portion of the second portion 47y is abutted against the right side plate

2018271249 26 Nov 2018 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 11c 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 lid. 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 11c.

[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.

2018271249 26 Nov 2018

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] opening frame (frame for a window) window frame (frame for a window) vertical frame (frame member) main portion

Ila outdoor side wall portion

2018271249 26 Nov 2018 lib indoor side wall portion

11c first wall portion lid second wall portion inner space receiving space outdoor side ventilation opening indoor side ventilation opening mounting opening covering member operation opening auxiliary ventilation opening ventilation control device operation knob shutter unit unit body a stopper

45a, 45b flange portion shutter plate

47x first portion

47y second portion torsion coil spring (spring)

Claims (7)

1. 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

   2018271249 13 Nov 2019 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.
2. [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.
3. [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.
4. [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 indooroutdoor 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,

   2018271249 13 Nov 2019 the unit body has a cylindrical configuration having a rectangular crosssection, 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.
5. [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.
6. [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.
7. [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.