JP6955358B2 - Ventilation system for vehicles - Google Patents

Description

The present invention relates to a vehicle ventilation device that is provided on a vehicle body and discharges vehicle interior air to the outside of the vehicle.

As shown in FIGS. 10 to 13, for example, behind the rear bumper 1 of an automobile, a vehicle ventilation device 10 called a ventilator, an outlet, or the like for releasing air inside the vehicle to the outside of the vehicle when the door 2 is closed is provided. Has been done.

An opening H is formed in a substantially central portion of the vehicle ventilation device 10, and a plurality of flap valves 11 (11A, 11B, in this case) that normally open only toward the outside of the vehicle are formed in the opening H. 11C) is provided. When the door 2 is closed, the air pressure from the vehicle interior is applied to the flap valve 11, so that the flap valve 11 opens to the outside of the vehicle and the air is discharged to the outside of the vehicle interior.

In such a vehicle ventilation device 10, increasing the area of the opening H for discharging air increases the amount of air discharged and improves the door closing property, but on the other hand, noise from the outside of the vehicle is generated. There is a problem that the amount of air that penetrates into the inside of the vehicle through the opening H increases and the soundproofing property deteriorates.

On the other hand, it is known that noise countermeasures are taken in the peripheral portion of the vehicle ventilation device 10 attached to the vehicle body (Patent Documents 1 to 3).

Japanese Patent No. 3791378 Japanese Unexamined Patent Publication No. 2015-3677 Japanese Patent No. 5714455

In the invention described in Patent Document 1, a sound absorbing material made of a non-woven fabric or the like is provided inside a vehicle ventilation device.
On the other hand, in the invention described in Patent Document 2, as shown in FIG. 14, a cover 12 for covering the vehicle ventilation device 10 from the outside of the vehicle is provided, and an air exhaust slit is provided in the vehicle outer wall of the cover 12. A plurality of 13 are formed.
Further, the invention described in Patent Document 3 also provides a cover that covers the vehicle ventilation device from the outside of the vehicle, and has an open portion for air discharge formed above the cover. The vehicle ventilation device described in Patent Document 3 is provided with a separator for branching a plurality of sound intrusion paths from the opening formed above the opening to the opening for discharging air. Therefore, the flap valve 11 as shown in FIGS. 11, 12, and 14 is not provided.

However, in the invention described in Patent Document 1, since the sound absorbing material is provided on the inside of the vehicle ventilation device, the sound invading from the outside of the vehicle to the inside of the vehicle is sufficiently soundproofed as compared with the invention provided on the outside of the vehicle. Can't. In particular, the sound absorbing material described in Patent Document 1 is made of a non-woven fabric or the like and has no water resistance, so that it cannot be set on the outside of the vehicle.
On the other hand, in the invention described in Patent Document 2, as shown in FIG. 14, a cover 12 for covering the vehicle ventilation device 10 is provided on the outside of the vehicle ventilation device 10, although the soundproofing performance is excellent. Since the air is discharged only through the slit 13 provided in the cover 12, it is difficult to remove a sufficient amount of air, and there is a problem that the door closing property is deteriorated.
Further, in the invention described in Patent Document 3, the sound that has entered from the open portion for air discharge is hit by passing through adjacent intrusion paths by a separator to cause sound interference and reduce the sound. Therefore, the soundproofing performance is lower than that of Patent Documents 1 and 2 covered with a sound absorbing material or a cover. In addition, the opening for air discharge is only formed above the cover that covers the opening, and the air discharged from the inside of the vehicle when the door is closed once enters the cover and collides with the separator while moving upward. There is a possibility that the air will not be able to escape smoothly and well, and the door closing property may deteriorate.

Therefore, an object of the present invention is to provide a vehicle ventilation device capable of reducing the sound of entering the vehicle interior from the outside of the vehicle without particularly deteriorating the door closing performance.

In order to achieve the above object, the vehicle ventilation device of the present invention is provided in the vehicle body, and an opening (H) for discharging the vehicle interior air to the outside of the vehicle is formed in a substantially central portion, and a first frame parallel to each other is formed. A body (31), a second frame (32), a third frame (33) connecting one ends of the first frame (31) and the second frame (32), and the first frame. A vehicle ventilation device (20) including a frame body portion (30) composed of a fourth frame body (34) that connects the other ends of the second frame body (32) and the second frame body (32).
A first support member (41) that extends along the first frame body (31) and is erected from the first frame body (31) toward the outside of the vehicle.
A second support member (42) that extends along the second frame body (32) and is erected from the second frame body (32) toward the outside of the vehicle.
It extends from the first support member (41) toward the second support member (42) side without contacting the second support member (42), and partially covers the opening (H) from the outside of the vehicle. First cover plate (51) and
It extends from the second support member (42) toward the first support member (41) side, partially covers the opening (H) from the outside of the vehicle, and contacts and contacts the first cover plate (51). Equipped with a second cover plate (52) provided without overlapping,
Between the first cover plate (51) and the second cover plate (52), between the first cover plate (51) and the third frame body (33), and the first cover plate (the first cover plate (33). Between the 51) and the fourth frame (34), between the second cover plate (52) and the third frame (33), and between the second cover plate (52) and the fourth frame. It is characterized by including an opening portion that opens the opening (H) from the outside of the vehicle to and from the frame body (34).

Further, the present invention is characterized in that a sound absorbing material is welded to the covering plate (51, 52).

Further, the present invention is characterized in that a sound absorbing material (60) is welded to the first support member (41) and the second support member (42).

Further, the present invention is characterized in that the sound absorbing material (60) is made of a highly foamed elastomer.

Further, in the present invention, the first support member (41) and the second support member (42) are formed in the first frame body (31) and the second frame body (32). It is characterized in that it is fitted to each of 38a).
Further, in the present invention, the sound absorbing material (60) is welded to the ends of the first support member (41) and the second support member (42), and the first support member (41) and the second support member (42) are further welded. The end portion of (42) is provided so as to abut on the back surface of the rear bumper (1).

The symbols in parentheses indicate the corresponding elements or corresponding items described in the drawings and the mode for carrying out the invention described later.

According to the present invention, the first support member is erected from the first frame body of the frame main body, the second support member is erected from the second frame body, and the vehicle interior air is erected on the first support member. Since the first cover plate is provided to cover the opening for discharging the air from the outside of the vehicle from the outside of the vehicle, it is possible to prevent noise from the outside of the vehicle from entering the inside of the vehicle.
Moreover, the first cover plate extends from the first support member toward the second support member side without contacting the second support member, and partially covers the opening from the outside of the vehicle. The central part and the upper and lower parts on the outside of the car are open. Therefore, when the door is closed, a wide path for releasing a sufficient amount of air from the inside of the vehicle to the outside of the vehicle is secured, and the air is discharged smoothly, so that the door closing property is not particularly deteriorated.
According to such a vehicle ventilation device, it is possible to prevent the sound from entering from the outside of the vehicle and to secure the amount of air discharged from the inside of the vehicle when the door is closed in a well-balanced manner.

Further, according to the present invention, a second cover plate is also provided on the second support member side to partially cover the opening from the outside of the vehicle, and the second cover plate comes into contact with or overlaps with the first cover plate. Air can be smoothly discharged from the inside of the vehicle to the outside of the vehicle from approximately the center of the opening.

Further, according to the present invention, since the sound absorbing material is welded to the first covering plate and the second covering plate, the sound absorbing effect is improved, and the sound absorbing material can be easily obtained from the first covering plate and the second covering plate. It does not come off and can be manufactured integrally. Further, since the sound absorbing material is welded to the first support member and the second support member, the sound absorbing effect is similarly improved, and the sound absorbing material is not easily peeled off, so that the sound absorbing material can be manufactured integrally.
As the sound absorbing material, an EPDM material made of a highly foamed elastomer can be used, and since the EPDM material has excellent water resistance, there is no problem even if it is provided on the outside of the vehicle.

Further, according to the present invention, since the first support member and the second support member are fitted into the concave grooves formed in the first frame body and the second frame body, respectively, they are fixed in a stable state. ..

It is a perspective view which shows the ventilation apparatus for vehicle which concerns on embodiment of this invention. FIG. 5 is an enlarged cross-sectional view taken along line AA of FIG. 10 showing a state in which a vehicle ventilation device according to an embodiment of the present invention is provided. FIG. 5 is an enlarged cross-sectional view taken along the line BB of FIG. 10 showing a state in which a vehicle ventilation device according to an embodiment of the present invention is provided. It is an enlarged perspective view which shows the structure around the 1st support member shown in FIG. FIG. 5 is an enlarged cross-sectional view taken along the line BB of FIG. 10 showing a state in which another vehicle ventilation device according to an embodiment of the present invention is provided. It is an enlarged perspective view which shows the structure around another 1st support member shown in FIG. It is a graph which shows the relationship between the frequency and the sound pressure level when the sound absorbing material is provided on the outside of a vehicle, and when it is provided on the inside of a vehicle. It is a graph which shows the relationship between a frequency and a sound absorption coefficient after water resistance of a sound absorbing material, (a) is a sound absorbing material provided in the vehicle ventilation apparatus which concerns on this embodiment, and (b) is a fiber-based sound absorbing material which concerns on a prior art example. It indicates the material. It is a graph which shows the relationship between the frequency and the sound pressure level in the case where the vehicle ventilation system which concerns on the embodiment of this invention is provided and the case where it is not provided at the time of traveling. It is an external perspective view of an automobile. It is a front view which shows the ventilation system for a vehicle which concerns on a conventional example. FIG. 5 is an enlarged cross-sectional view taken along line AA of FIG. 10 showing a state in which a vehicle ventilation device according to a conventional example is provided. FIG. 5 is an enlarged cross-sectional view taken along line BB of FIG. 10 showing a state in which a vehicle ventilation device according to a conventional example is provided. It is a perspective view which shows another ventilation system for a vehicle which concerns on the prior art example.

The vehicle ventilation device according to the embodiment of the present invention will be described with reference to the drawings. The same parts as in the conventional example are designated by the same reference numerals.
As shown in FIGS. 1 to 3 and 10, the vehicle ventilation device 20 is an outlet provided behind the rear bumper 1 of the automobile and discharging the air inside the vehicle to the outside of the vehicle when the door 2 is closed.
The vehicle ventilation device 20 includes a frame body portion 30 formed in a tubular shape composed of a first frame body 31, a second frame body 32, a third frame body 33, and a fourth frame body 34, and the frame body portion 30. An opening H is formed in a substantially central portion, and the opening H is provided with three flap valves 11A, 11B, and 11C, which are open only toward the outside of the vehicle.

The first frame body 31 and the second frame body 32 constituting the frame main body portion 30 are plate-shaped members extending vertically, and are arranged so as to be parallel to each other with the plate surfaces facing each other. The third frame 33 is a plate-shaped member that connects the upper ends (one ends) of the first frame 31 and the second frame 32 and extends horizontally, and the fourth frame 34 is the first frame 31. And the lower ends (one ends) of the second frame 32 are connected to each other, and the plate-shaped member is curved so as to protrude downward.

A flange portion 35 that surrounds the entire circumference of the outer end portion of the vehicle and projects outward is provided at the outer end portion of the frame main body portion 30.
The support shafts 11Aa, 11Ba, and 11Ca that support the upper ends of the flap valves 11A, 11B, and 11C are rotatably attached to the inside of the frame body 30. The flap valves 11A, 11B, 11C may have any form as long as they can be opened freely toward the outside of the vehicle, but in the present embodiment, the flap valves 11A, 11B, 11C have their lower ends when closed. , The shelf plate portions 36A, 36B, 36C horizontally arranged inside the vehicle of the frame main body portion 30 are provided so as to abut and incline with the vehicle outer end portions.

Guide rails 37, 38 having recessed grooves 37a, 38a formed toward the outside of the vehicle are provided on the outer side of the left and right side surfaces of the flange portion 35, and the concave grooves 37a, 38a are provided with the concave grooves 37a, 38a as shown in FIG. , The first support member 41 and the second support member 42 are fitted to each other.
The first support member 41 extends vertically along the first frame body 31 and is erected from the first frame body 31 toward the outside of the vehicle via the flange portion 35 and the guide rail 37, and the second support member 42 Is vertically extended along the second frame body 32, and is erected from the second frame body 32 toward the outside of the vehicle via the flange portion 35 and the guide rail 38 to form a strut structure. The first support member 41 and the second support member 42 have a substantially T-shaped cross section, and as shown in FIG. 1, the heads of the first support member 41 and the second support member 42 are fitted into the recessed grooves 37a and 38a of the guide rails 37 and 38 while sliding. And fixed. FIG. 1 shows a state in which the second support member 42 with the second cover plate 52 slides into the guide rail 38, but the first support member 41 with the first cover plate 51 slides into the guide rail 37. The same applies to the case where it is fitted.

Inside the first support member 41, a plate-shaped first cover plate 51 that extends toward the second support member 42 side and partially covers the opening H from the outside of the vehicle is provided, and conversely, the second support member 41 is provided. Inside the member 42, a plate-shaped second covering plate 52 extending toward the first support member 41 side and partially covering the opening H from the outside of the vehicle is provided.
The first support member 41 and the second support member 42 have the same size and are symmetrical, and the first cover plate 51 and the second cover plate 52 provided on them are also the same size and the first support member 41 and the second support member 41 and the second. It is arranged symmetrically with respect to the support member 42.

Then, the sound absorbing material 60 is welded so as to surround the first support member 41 and the second support member 42 including the first cover plate 51 and the second cover plate 52.
The amount of protrusion T of the first cover plate 51 covered with the sound absorbing material 60 from the first support member 41 and the amount of protrusion T of the second cover plate 52 coated with the sound absorbing material 60 from the second support member 42 are: In the present embodiment, the width (left and right width) S of the opening H is set to cover 1/3 to 1/4, and the opening H is not largely covered from the outside of the vehicle by the first cover plate 51 and the second cover plate 52. It is set as. In this embodiment, it is set to 1/4. That is, the region of 1/2 (= 1-((1/4) × 2)) of the width (left-right width) S of the opening H is covered from the outside of the vehicle by the first cover plate 51 and the second cover plate 52. It is an unbroken area. Further, the upper and lower parts of the opening H on the outside of the vehicle are also in an open state because they are not covered by the first cover plate 51 and the second cover plate 52.
Further, the end portion of the first support member 41 covered with the sound absorbing material 60 and the end portion of the second support member 42 are provided so as to abut on the back surface of the rear bumper 1.

A highly foamed elastomer is used as the sound absorbing material 60. In particular, it is preferable to use an EPDM foam having a specific gravity of 0.05 to 0.4. In this embodiment, an EPDM material was used.
Further, a resin such as PE (preethylene) is used for the first support member 41, the second support member 42, the first cover plate 51, and the second cover plate 52.

According to the vehicle ventilation device 10 configured in this way, the first support member 41 with the first cover plate 51 and the second support member 42 with the second cover plate 52 discharge the vehicle interior air to the outside of the vehicle. Since the opening H is provided so as to cover from the outside of the vehicle, it is possible to prevent noise from the outside of the vehicle from entering the inside of the vehicle.
That is, as shown by the arrow X in FIGS. 2 and 3, the sound incident from the outside of the vehicle over the rear bumper 1 is mainly prevented by the first cover plate 51 and the second cover plate 52. As indicated by the arrow Y, the sound incident from the rear tire side is mainly prevented by the first support member 41 and the second support member 42.

Moreover, the first support member 41 with the first cover plate 51 and the second support member 42 with the second cover plate 52 are arranged so that the first cover plate 51 and the second cover plate 52 do not abut or overlap with each other. Since the central part and the upper and lower parts of the outside of the vehicle of the opening H are open, a wide route for releasing a sufficient amount of air from the inside of the vehicle to the outside of the vehicle is secured when the door is closed, and the air is smooth. Be released.
That is, as shown by arrows Z in FIGS. 2 and 3, when the door 2 is closed, the flap valves 11A, 11B, 11C are opened from the inside of the vehicle, and the air released from the opening H to the outside of the vehicle is released. Due to the presence of the first cover plate 51 and the second cover plate 52, the first cover plate 51 and the second cover plate 52 are dispersed laterally (horizontally and horizontally) from the central portion to the first support member 41 side and also from the central portion to the second support member 42 side, and are greatly dispersed. It is emitted from the open vertical direction.
As a result, it is possible to prevent the door closing property from being particularly deteriorated.

Further, since the sound absorbing material 60 is welded so as to surround the first support member 41 and the second support member 42 including the first cover plate 51 and the second cover plate 52, as compared with the case where these are not provided. A higher soundproofing effect can be obtained. Further, the sound absorbing material 60 may be attached to the first and second covering plates 51 and 52 and the first and second supporting members 41 and 42, but in the present embodiment, it is welded, so that the first covering plate 51 The sound absorbing material 60 can be integrally molded at the same time when the first support member 41 with the attachment and the second support member 42 with the second cover plate 52 are manufactured.

In the present embodiment, the first cover plate 51 and the second cover plate 52 are provided on both the first support member 41 and the second support member 42, but as shown in FIG. 5, the first support member 41 It is also possible to provide the first cover plate 51 only on the side and not to provide the second cover plate 52 on the side of the second support member 42. In the present embodiment, the amount of protrusion T of the first cover plate 51 covered with the sound absorbing material 60 from the first support member 41 is set to cover 1/2 of the width (left and right width) S of the opening H.

Further, as shown in FIG. 6, the sound absorbing material 60 is provided only on the inner side of the first cover plate 51 and the first support member 41, that is, the surface facing the second support member 42 side, and the second cover on the opposite side. Welding may be performed only on the inner side of the plate 52 and the second support member 42, that is, the surfaces facing each other on the first support member 41 side. Further, the sound absorbing material 60 may be welded only to the first cover plate 51 and the second cover plate 52.
Further, instead of welding the sound absorbing material 60, the materials of the first covering plate 51 and the second covering plate 52 themselves are made excellent in sound absorbing property, and in addition, the first support member 41 and the second support are supported. The material of the member 42 itself may be made of a material having excellent sound absorption.
It should be noted that the sound absorbing material 60 is not welded, and the first covering plate 51, the second covering plate 52, the first supporting member 41 and the second supporting member 42 are not made of a material having particularly excellent sound absorbing properties. If the outside of the opening A is covered with the first support member 41 with the first cover plate 51 and the second support member 42 with the second cover plate 52, a sound absorbing effect can be obtained and the inside of the vehicle can be obtained. The air is discharged from the door and the door closing property is not deteriorated.

Further, in the present embodiment, guide rails 37, 38 having recessed grooves 37a, 38a formed toward the outside of the vehicle are provided on the left and right side surface portions of the flange portion 35, and the concave grooves 37a, 38a are provided with guide rails 37, 38. One support member 41 and the second support member 42 are fitted to each other, but any embodiment is provided as long as the first support member 41 and the second support member 42 are attached to the outside of the vehicle of the frame main body 30. It may be.
For example, a concave groove into which the first support member 41 and the second support member 42 are fitted may be formed on the outer side of the flange portion 35, or the frame main body portion 30 is formed instead of providing the flange portion 35. A concave groove may be formed directly on the outer side of the first frame 31 and the second frame 32. Further, the first support member 41 and the second support member 42 may be integrally molded on the outer side of the frame main body 30.

Further, in the present embodiment, the opening H is provided with flap valves 11A, 11B, 11C that rotate toward the outside of the vehicle, but even if the opening H is not provided with flap valves 11A, 11B, 11C. Applicable.

Next, as a result of experiments in the case where the sound absorbing material 60 used in the present embodiment is provided on the outside of the vehicle and the case where the sound absorbing material 60 is provided on the inside of the vehicle, the graph showing the relationship between the frequency and the sound pressure level shown in FIG. 7 shows the outside of the vehicle. It was confirmed that it is preferable to provide it in. In particular, since the sound absorbing material 60 is made of EPDM material and has excellent water resistance, there is no particular problem even if it is provided on the outside of the vehicle. That is, as can be seen from the graph showing the relationship between the frequency and the sound absorption coefficient shown in FIG. 8A, the peak value of the sound absorption performance of the EPDM material after water resistance does not decrease, so that it can be set to the outside of the vehicle. Become. On the other hand, in the conventionally used fiber-based sound absorbing material, as can be seen from the graph showing the relationship between the frequency and the sound absorbing coefficient shown in FIG. 8 (b), the sound absorbing performance is greatly deteriorated when it comes into contact with water. It is not preferable because it will end up. In addition to the fiber-based sound absorbing material, the urethane-based sound absorbing material is also not preferable.

Then, when the vehicle ventilation device 20 according to the embodiment of the present invention was provided and evaluated for traveling, the graph showing the relationship between the frequency and the sound pressure level showed that, as compared with the case where the ventilation device 20 was not provided, especially in the frequency band around 1000 Hz. It was confirmed that the sound pressure level at the driver's ear position could be reduced.

1 Rear bumper 2 Door 10 Vehicle ventilation system 11 Flap valve 11A, 11B, 11C Flap valve 11Aa, 11Ba, 11Ca Support shaft 12 Cover 13 Slit 20 Vehicle ventilation system 30 Frame body 31 First frame 32 Second frame 33 Third frame body 34 Fourth frame body 35 Flange part 36A, 36B, 36C Shelf board part 37, 38 Guide rail 37a, 38a Recessed groove 41 First support member 42 Second support member 51 First cover plate 52 Second cover Plate 60 Sound absorbing material H Opening

Claims (6)

An opening provided in the vehicle body for discharging the air inside the vehicle to the outside of the vehicle is formed in a substantially central portion, and the first frame body and the second frame body parallel to each other and one ends of the first frame body and the second frame body are connected to each other. A vehicle ventilation device including a frame main body portion including a third frame body for connecting the above frames and a fourth frame body for connecting the other ends of the first frame body and the second frame body.
A first support member that extends along the first frame and is erected from the first frame toward the outside of the vehicle.
A second support member that extends along the second frame and is erected from the second frame toward the outside of the vehicle.
A first cover plate that extends from the first support member toward the second support member side without contacting the second support member and partially covers the opening from the outside of the vehicle.
It extends from the second support member toward the first support member side, partially covers the opening from the outside of the vehicle, and is provided with a second cover plate provided without contacting or overlapping the first cover plate. ,
Between the first cover plate and the second cover plate, between the first cover plate and the third frame body, between the first cover plate and the fourth frame body, and the first (Ii) For a vehicle, the vehicle is provided with an opening portion that opens the opening from the outside of the vehicle between the cover plate and the third frame body and between the second cover plate and the fourth frame body. Ventilation system. The vehicle ventilation device according to claim 1 , wherein a sound absorbing material is welded to the cover plate. The vehicle ventilation device according to claim 1 or 2 , wherein a sound absorbing material is welded to the first support member and the second support member. The vehicle ventilation device according to claim 3 , wherein the sound absorbing material is made of a highly foamed elastomer. Any of claims 1 to 4 , wherein the first support member and the second support member are fitted into the first frame body and the concave groove formed in the second frame body, respectively. Ventilation device for vehicles described in one. A sound absorbing material is welded to the ends of the first support member and the second support member, and the ends of the first support member and the second support member are provided so as to abut against the back surface of the rear bumper. The vehicle ventilation device according to any one of claims 1 to 5, wherein the ventilation device is provided.

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