JP3169556U - Wind noise reduction structure for automobile and its member - Google Patents

Abstract

An automobile wind noise reduction structure capable of suppressing the generation of wind noise easily and inexpensively is provided. On the inner surface of a lower edge 21 of a side visor 2 attached along an upper edge of a window 3 of an automobile V, a rectifying member 1 having a downward opening-like wind entrainment groove 10 is attached. [Selection] Figure 2

Description

  The present invention relates to an automobile wind noise reduction structure and its members.

2. Description of the Related Art Conventionally, a side visor is widely known that is attached along the upper edge of a window provided on a door of an automobile to prevent rainwater from entering when the window is opened or to serve as a sunshade.
However, when the side visor is attached to the vehicle, the traveling wind from the front that flows along the outer surface of the vehicle during traveling is caught between the side visor and the window glass, and the turbulence of the airflow is generated. Then, there is a problem that noise due to wind noise is generated due to the disturbance of the airflow.

  In view of this, a side visor has been proposed that suppresses the turbulence of the airflow by the rib on the inner surface of the lower end edge and reduces the wind noise (see Patent Document 1).

JP 2002-87057 A

In the side visor described in Patent Document 1, the rectifying effect by the ribs cannot be sufficiently obtained during high-speed traveling, and the airflow is still easily disturbed.
In addition, since such a side visor is usually manufactured by integral plastic molding, it is necessary to change the design at the molding process just to provide a rib, and it is necessary to remodel from the mold, resulting in tremendous cost. In addition, there is a problem that the installed side visor must be replaced in order to cope with existing cars.

  Therefore, an object of the present invention is to provide an automotive wind noise reduction structure that can suppress the generation of wind noise easily and inexpensively.

  In the wind noise reduction structure for automobiles according to the present invention, a rectifying member having a concave groove portion for preventing wind entrainment having a downward opening is attached to the inner surface of the lower edge of the side visor attached along the upper edge of the automobile window. Is.

The straightening member is provided over a predetermined length from the front end of the side visor, and the predetermined length is set to 0.5 × L ₀ ≦ L ₁ with respect to the total length of the side visor. It is what has been.
Moreover, the said rectification | straightening member is attached to the said side visor using the double-sided adhesive tape.
Further, in order to form the concave groove portion, it has an inwardly downwardly inclined tongue piece extending in the vehicle interior direction, and the lower end of the tongue piece is arranged below the lowermost end portion of the side visor in the cross section. It has been established.
The rectifying member is made of a transparent or translucent soft plastic.

  An automotive wind noise reduction member according to the present invention is an automotive wind noise reduction member attached to a side visor attached along the upper edge of an automobile window, and the inner surface of the lower edge of the side visor. Are provided with a sticking surface part for fixing with a double-sided adhesive tape, and a downward opening-like groove part for preventing wind entrainment is formed by a hanging tongue piece.

According to the wind noise reduction structure for automobiles of the present invention, a sufficient rectifying effect can be exhibited even during high-speed running, and the running wind can be prevented from being caught in the side visor. Therefore, it is possible to significantly reduce the occurrence of airflow turbulence that causes wind noise, and to prevent noise. As a result, the interior space with the windows closed can be kept quiet, conversation with passengers is easy, and music is easy to hear. In addition, wind noise can be reduced simply by attaching a rectifying member to the side visor, and it is easy to deal with side visors installed in existing automobiles.
Moreover, according to the wind noise reduction member for automobiles of the present invention, it is possible to suppress the occurrence of turbulence of the air current during high speed running, and to reduce wind noise. In addition, it can be easily attached to the side visor installed in existing cars.

It is the side view which showed the use condition of this invention. It is ZZ expanded sectional drawing of FIG. It is an expanded sectional view showing one embodiment of the present invention. It is the expanded sectional view which showed the modification of this invention. It is the graph which showed the frequency (Hz) on the horizontal axis and the sound pressure level (dB) on the vertical axis.

Hereinafter, the present invention will be described in detail with reference to the drawings showing embodiments.
As shown in FIGS. 1 and 2, the wind noise reduction structure for an automobile of the present invention has a lower opening shape on the inner surface of the lower end edge 21 of the side visor 2 attached along the upper edge of the window 3 of the automobile V. A rectifying member 1 having a concave groove portion 10 for preventing wind entrainment is provided.
The rectifying member 1 has an inwardly downwardly inclined tongue piece 11 that extends in the vehicle interior direction in order to form the concave groove portion 10. In the cross section shown in FIG. 3, the lowermost end 11 </ b> A of the tongue piece 11 is disposed below the lowermost end portion 22 of the side visor 2. In other words, it can be said that the drooping tongue piece 11 forms the downward opening-shaped wind entrainment concave groove 10. Further, the flow regulating member 1 includes a sticking surface portion 12 for fixing the double-sided adhesive tape 4 to the inner surface of the lower end edge 21 of the side visor 2.

  The rectifying member 1 is made of a transparent or translucent soft plastic, and for example, it is desirable to use a flexible material such as vinyl chloride or rubber. Considering that the side visor 2 is usually formed of a transparent or translucent hard plastic, it is preferable that the rectifying member 1 has the same color as the side visor 2. The rectifying member 1 is attached (attached) to the inner surface of the lower edge 21 of the side visor 2 attached to the doors of the driver's seat and the passenger seat of the automobile V using a double-sided adhesive tape 4. The rectifying member 1 may be attached to the side visor 2 of the rear seat door.

As shown in FIG. 1, the rectifying member 1 is attached from the front end portion 20 of the side visor 2 over a predetermined length dimension L _1, a predetermined length L ₁ is a nucleic length L ₀ of the side visor 2, 0.5 × L ₀ ≦ L ₁ is set.
In the illustrated example, the length L ₁ of the rectifying member 1 is set to about 75% of the total length L ₀ of the side visor 2, but the rectifying member is not limited to this embodiment. 1 may be provided over at least 50% of the overall length L ₀ of the side visor 2.

In the present invention, the side visor 2 is attached to the window frame 30 on the upper edge of the window 3 of the automobile V, prevents rainwater from entering the vehicle with the window glass 31 opened, and serves as an awning. Is a conventionally known one. That is, the rectifying member 1 of the present invention is an automotive wind noise reducing member that is attached (by retrofitting) to a side visor 2 attached to an existing automobile V, and is provided on both inner surfaces of the lower end edge 21 of the side visor 2. It can also be said that a sticking surface portion 12 for fixing with the adhesive tape 4 is provided, and the downwardly opening-shaped wind entrainment concave groove portion 10 is formed by the hanging tongue piece 11.
In other words, the rectifying member 1 is configured so as to control the flow of wind and reduce the generation of wind noise during traveling only by being attached to the side visor 2 (using the double-sided adhesive tape 4). Yes.

  Note that the design of the present invention can be changed. For example, as shown in FIG. 4, it is preferable that the air entrainment preventing groove portion 10 of the rectifying member 1 is formed in a substantially arc shape (smooth surface shape). By carrying out like this, the rectification effect of the rectification member 1 becomes easier to be exhibited, and generation | occurrence | production of a wind noise can be reduced reliably.

The use method (action) of the present invention described above will be described.
As shown in FIG. 1 and FIG. 2, the traveling wind F from the front of the automobile V wraps around the lower edge 21 of the side visor 2 and reaches the inner surface of the side visor 2 and the upper edge of the (closed) window glass 31. It tries to invade into the lower opening-shaped space 9 formed as described above. The rectifying member 1 guides the traveling wind F, which is going to enter the space 9 (upwardly from below) around the lower edge 21 of the side visor 2, by bouncing back by the wind entrainment concave groove 10. Thus, the traveling wind F is prevented from being caught, and the occurrence of the turbulence of the air current is suppressed and the wind noise is reduced.

FIG. 5 is a graph showing the frequency (Hz) on the horizontal axis and the sound pressure level (dB) on the vertical axis.
Graph G ₁ indicated by a solid line in the figure is an example of an automotive air-turbulence noise reduction structure of the present invention (automotive air-turbulence noise reducing member) At a vehicle V traveling at a speed of 100km / h The sound pressure level (dB) of wind noise is measured in the frequency range of 20 Hz to 5000 Hz, and the measurement results are shown. The graph G ₂ indicated by a broken line in the drawing, a motor vehicle having a side visor which has been conventionally used to run at a speed of 100km / h, under the same conditions as in Example, the wind noise sound pressure level (dB) The comparative example which measured was shown.

  FIG. 5 shows that the wind noise of the automobile equipped with the automobile wind noise reduction structure (automobile wind noise reduction member) of the present invention is reduced when the embodiment and the comparative example are compared. Recognize. In particular, in the frequency band S of 500 Hz to 1000 Hz, which is easily perceived by the driver in the vehicle as noise, the sound pressure level is reduced by an attenuation d = 2.5 dB to 3.0 dB.

  As described above, the wind noise reduction structure for automobiles according to the present invention is for preventing wind entrainment in the form of a downward opening on the inner surface of the lower end edge 21 of the side visor 2 attached along the upper edge of the window 3 of the automobile V. Since the rectifying member 1 having the recessed groove portion 10 is attached, the rectifying member 1 exerts a sufficient rectifying effect even during high-speed traveling, can prevent the traveling wind F from being caught in the side visor 2, and can suppress the turbulence of the airflow. Wind noise can be reduced. As a result, the interior space with the windows closed can be kept quiet, conversation with passengers is easy, and music is easy to hear.

Also, the rectification element 1 is attached from the front end portion 20 of the side visor 2 over a predetermined length dimension _{L 1,} a predetermined length _{L 1} is a nucleic length _{L 0} of the side visor 2, 0.5 × L _{Since 0} ≦ L ₁ is set, the rectifying effect by the rectifying member 1 is sufficiently exhibited, and wind noise can be reliably reduced.

  Moreover, since the rectifying member 1 is attached to the side visor 2 using the double-sided adhesive tape 4, the attachment can be performed simply by attaching the rectifying member 1 to the side visor 2, and wind noise can be reduced easily. . Therefore, it is easy to deal with the side visor 2 mounted on the existing automobile V.

  Further, in order to form the concave groove portion 10, the tongue portion 11 has an inwardly inclined shape extending in the vehicle interior direction, and the lowermost end portion 11 </ b> A of the tongue piece 11 is lower than the lowermost end portion 22 of the side visor 2. Since it arrange | positions below, the rectification effect by the rectification | straightening member 1 is fully exhibited, and a wind noise can be reduced reliably.

  Further, since the rectifying member 1 is made of transparent or translucent soft plastic, it is not noticeable even when attached to the side visor 2 and has high safety against external contact.

  Moreover, according to the wind noise reduction member for automobiles of the present invention, the wind noise reduction member for automobiles attached to the side visor 2 attached along the upper edge of the window 3 of the automobile V, Since the attachment surface portion 12 for fixing the double-sided adhesive tape 4 with the double-sided adhesive tape 4 is provided on the inner surface of the lower end edge 21 and the downward-opening wind entrainment concave groove portion 10 is formed by the drooping tongue piece 11, the high speed The occurrence of turbulence in the airflow during traveling can be suppressed, and wind noise can be reduced. Moreover, it can be easily attached to a side visor mounted on an existing automobile V by retrofitting.

DESCRIPTION OF SYMBOLS 1 Flow regulating member 2 Side visor 3 Window 4 Double-sided adhesive tape 10 Groove part 11 Tongue piece 11A Bottom end 12 Adhering surface part 20 Front end part 21 Bottom edge 22 Bottom end part V Automobile L ₁ Predetermined length dimension L ₀ full length length dimension

Claims (6)

  A rectifying member (1) having a downward opening-like groove portion (10) for preventing wind entrainment on the inner surface of the lower end edge (21) of the side visor (2) attached along the upper edge of the window (3) of the automobile (V). The structure for reducing wind noise for automobiles is provided. The rectifying member (1) is provided from the front end (20) of the side visor (2) over a predetermined length (L ₁ ), and the predetermined length (L ₁ ) is the total length of the side visor (2). The wind noise reduction structure for an automobile according to claim ₁ , wherein 0.5 × L ₀ ≦ L ₁ is set with respect to the length dimension (L ₀ ).   The wind noise reduction structure for an automobile according to claim 1 or 2, wherein the rectifying member (1) is attached to the side visor (2) using a double-sided adhesive tape (4).   In order to form the concave groove (10), it has an inwardly downwardly inclined tongue piece (11) extending in the vehicle interior direction, and in the cross section, the lowermost end (11A) of the tongue piece (11) is The wind noise reduction structure for automobiles according to claim 1, 2 or 3, wherein the structure is disposed below the lowermost end (22) of the side visor (2).   The automotive wind noise reduction structure according to claim 1, 2, 3 or 4, wherein the rectifying member (1) is made of a transparent or translucent soft plastic. An automotive wind noise reduction member attached to a side visor (2) attached along an upper edge of a window (3) of an automobile (V),
The side visor (2) has a sticking surface portion (12) for fixing with a double-sided adhesive tape (4) on the inner surface of the lower edge (21), and has a downward opening with a hanging tongue piece (11). A wind noise reduction member for automobiles, characterized in that a concave groove (10) for preventing wind entrainment is formed.

Images