JP2001206166A - Sound insulating weather strip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sound insulating weather strip capable of preventing the noise on the outside of a cabin from invading easily into the cabin due to an insufficient sound insulating function. SOLUTION: In a weather strip for automobile having a hollow seal part 11 a rubber or synthetic resin high-foam sponge material 17 is provided on the hollow seal part 11 at a portion compressed between a door or a glass 20 and a body panel 21 when a door is closed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weatherstrip having a high sound insulation effect and attached to an automobile.

[0002]

2. Description of the Related Art A description will be given with reference to FIGS. 2. Description of the Related Art Conventionally, in a weather strip 30 attached to a door window frame 20 of an automobile, the weather strip 30 attached to a roof 22 side includes, as shown in FIG. It is composed of a hollow seal portion 31 and a lip portion 33 which resiliently exhibit sealing properties. As shown in FIG. 3, the component attached to the center pillar 23 includes a base portion 32, a hollow seal portion 31, and a small lip portion 34 elastically contacting the door sash 20.

In the weather strip 30 having such a configuration, the hollow seal portion 31 is required to have not only a waterproof function for preventing intrusion of water such as rainwater and car wash water, but also a sound insulation function for preventing intrusion of sound from outside the vehicle. ing.

However, the hollow seal portion 31 in the conventional weather strip 30 cannot be said to have a sufficient sound insulation function. Therefore, there is a problem that noise outside the vehicle easily enters the room even when the window glass is closed.

[0005] Similarly, an opening weather strip which is attached to a body flange, a sash, a retainer, or the like of an automobile and has a hollow sealing portion elastically contacting the door, glass or body when the door is closed to exhibit sealing properties.
Other weather strips such as drip weather strips, trunk weather strips, and hard top weather strips are also required to have a function of preventing sound from entering from outside the vehicle.

[0006]

A problem to be solved is that a conventional weatherstrip does not have a sufficient sound insulation function, so that noise outside the vehicle easily enters a room.

[0007]

A description will be given with reference to FIG. 1 and FIGS. 4 to 19. The sound insulating weather strip according to the first invention is a weather strip for an automobile having a hollow seal portion 11, wherein the hollow seal portion 11 has
A highly foamed sponge material 17 made of rubber or synthetic resin is provided at a portion which is compressed by being sandwiched between the door window frame 20 or the glass 20a and the body panel 21 when the door is closed.

[0008] A sound-insulating weatherstrip according to a second invention is characterized in that, in the first invention, the highly foamed sponge material 17 is smaller than the specific gravity of the hollow seal portion 11.

A sound insulating weather strip according to a third invention is characterized in that, in the first or second invention, the specific gravity of the highly foamed sponge material 17 is 0.1 to 0.3.

A sound insulating weather strip according to a fourth invention is characterized in that, in the first, second or third invention, the highly foamed sponge material 17 is formed by extrusion molding integrally with the hollow seal portion. It is.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a sound insulating weather strip 10 according to the present invention will be described with reference to FIGS. 1, 4 and 5. FIG. This sound insulating weather strip 10
Is attached to the door window frame 20 on the roof 22 side, and mainly includes a base portion 14, a hollow seal portion 11, and a lip portion 15. When the door is closed, the door window frame 20 and the body panel 2 of the hollow seal portion 11 are closed.
Indoor side 40, which is a part that is greatly compressed between
In the hollow portion 13 at the lower end, a specific gravity of 0.1 to
A soft and highly foamed sponge material 17 of about 0.3 is provided.

The high-foamed sponge material 17 has a uniform density at the time of extrusion molding, but when it is compressed between the door window frame 20 and the body panel 21, the interior 40 thereof has a large amount of compression. The density is increased (the eyes are fine), and the density is low (the eyes are coarse) because the compression amount is small at the outside 50 portion. The high-foam sponge material 17
Is integrally formed with the hollow seal portion 11 by co-extrusion molding.

A second embodiment of the weather strip 10 according to the present invention will be described with reference to FIG. 1, FIG. 6 and FIG. This sound insulating weather strip 10 is used for the door window frame 2.
0, which is attached to the center pillar 23 side,
It comprises a hollow seal portion 11 and a small lip portion 16. When the door is closed, the door window frame 20 and the body panel 2 are closed.
A highly foamed sponge material 17 made of synthetic rubber is provided in a hollow portion 13 of a portion which is compressed by being sandwiched between the two.

A third embodiment of the weather strip 10 according to the present invention will be described with reference to FIGS. The sound insulating weather strip 10 is attached to the door window frame 20 on the roof 22 side. The feature of the weather strip 10 is that the highly foamed sponge material 17 is provided in the hollow portion 13 in the first embodiment and the second embodiment, but is provided over the hollow portion 13 and the seal portion 12. That is.

The shape of the highly foamed sponge material 17 is not limited to a circular cross section, but can be set to any shape such as a square shape or a lip shape.

The operation of the sound insulating weather strip 10 according to the first to third embodiments will be described. In these weather strips 10, the hollow seal portion 1
(1) Since the high-foamed sponge material 17 is provided in a portion which is compressed by being sandwiched between the door window frame 20 and the body panel 21 when the door is closed, it is possible to reliably prevent the sound outside the vehicle from entering the room. it can. That is, this highly foamed sponge material 17
When the door is closed, it is sandwiched between the door window frame 20 and the body panel 21 so as to close the gap between the door window frame 20 and the body panel 21. This is because the material 17 absorbs the sound outside the vehicle, or reflects or scatters the sound outside the vehicle, thereby preventing entry into the room.

The high-foamed sponge material 17 has a uniform density at the time of extrusion molding, but when it is compressed by being sandwiched between the door window frame 20 and the body panel 21, the compression amount of the indoor side 40 is large. Therefore, the density is high, and the density of the outside 50 part is low because the compression amount is small.
The sound can be absorbed and absorbed at the interior side 40 and reflected and scattered at the interior side 40 without fail. Therefore, intrusion of sound can be surely prevented by both the sound absorbing effect and the reflection scattering effect. In general, in the field of noise reduction technology, it is said that ideal sound insulation is achieved by reducing the density of the sound insulating material 17 on the sound input side and increasing the density of the sound insulating material 17 on the sound receiving side. The present invention embodies the ideal of such sound insulation.

Further, in the weather strip 10 according to the present embodiment, the sound insulation effect can be enhanced by providing an air layer in the hollow portion 13 of the hollow seal portion 11. That is, there is an idea that the thickness of the high-foamed sponge material 17 is increased by providing the high-foamed sponge material 17 in a form in which the hollow portion 13 is crushed in the entire area inside the hollow portion 13, thereby enhancing the sound insulation effect. . However, the present inventor has proposed that the sealing portion 1 adjacent to the high-foaming sponge material 17 be larger than the thickening of the high-foaming sponge material 17.
2 (in FIG. 5, the sealing portion on the body panel 21 side), it is considered that providing an air layer increases the sound insulation effect.
Such a configuration was adopted. There is such an idea in the field of noise reduction technology.

Next, an embodiment of the opening weather strip 60 according to the present invention will be described with reference to FIGS. This opening weather strip 60
Is attached to the body flange 24 of the automobile, and has a metal core 65 and a claw portion 63.
And a hollow seal portion 61 integrally formed with the trim main body 62. The high-foam sponge material 17 made of rubber or synthetic resin is provided on a portion of the hollow seal portion 61 which is compressed between the body panel 21 and the door window frame 20 when the door is closed.

This highly foamed sponge material 17 has a specific gravity smaller than the specific gravity of the hollow seal 61 and is set to about 0.1 to 0.3. The sponge material 17 is extruded integrally with the hollow seal portion.

In the present embodiment, the weather strip 30 is attached to the door window frame.
As shown in FIG. 7, the present invention can be applied to an automobile having a structure in which a weather strip is not attached to the door window frame 20.

Although not shown, an automobile having a structure in which a sealing material called a parting seal is attached to the door window frame 20 instead of attaching the weather strip to the door window frame 20, or the door window frame 2
Instead of attaching a weather strip to the vehicle, the present invention can be applied to an automobile having a structure in which a drip seal is attached to a body side.

The operation of the sound insulating opening weather strip 60 according to the embodiment shown in FIGS. 9 and 10 will be described. In the opening weather strip 60, the high-foam sponge material 17 is provided in a portion of the hollow seal portion 61 which is compressed by being sandwiched between the body panel 21 and the door window frame 20 when the door is closed. Intrusion into the room can be reliably prevented. In other words, the highly foamed sponge material 17 is
When the door is closed, the body panel 2
Positioned so as to close the gap between 1 and the door window frame 20,
It absorbs sound outside the vehicle, or reflects or scatters the sound outside the vehicle, thereby preventing intrusion into the room.

The high-foam sponge material 17 has a uniform density at the time of extrusion molding, as in the case of the sponge material attached to the weather strip.
When compressed between the door window frame 20 and the
The portion has a high density due to a large amount of compression, and the 50 outside portion has a low density due to a small amount of compression. Thereby, intrusion of sound can be reliably prevented by both the sound absorbing effect and the reflection scattering effect.

In the sound insulating opening weather strip 60 according to the present embodiment, similarly to the case of the weather strip, an air layer is provided in the hollow portion 64 of the hollow seal portion 61 to enhance the sound insulating effect.

FIGS. 11 to 13 show the hard top weather strip 70. When the highly foamed sponge material 17 in the hollow seal portion 11 is compressed by the glass 20a, the interior side 40 becomes the dense sponge portion 17a and The outer side 50 becomes the rough sponge portion 17b.

FIGS. 14 to 16 show the drip weather strip 80. FIG. FIG. 15 shows a structure in which a highly foamed sponge material 17 is disposed in the hollow portion 13, and FIG. 16 shows a case where the highly foamed sponge material 17 is provided so as to constitute a part of the peripheral wall of the hollow portion 13. When the highly foamed sponge material 17 is compressed by the door window frame 20, the interior side 40 becomes the dense sponge portion 17a, and the exterior side 50 becomes the coarse sponge portion 17a.
b.

FIGS. 17 to 19 show the trunk weather strip 90. FIG. FIG. 18 shows a structure in which a highly foamed sponge material 17 is disposed in the hollow portion 13, and FIG. 19 shows a case where the highly foamed sponge material 17 is provided so as to constitute a part of the peripheral wall of the hollow portion 13. Door window frame 20 or door panel 20
When the highly foamed sponge material 17 is compressed by b, the interior side 40 becomes the dense sponge portion 17a and the vehicle outside 50 becomes the coarse sponge portion 17b.

[0029]

EXAMPLES The present inventors conducted an experiment to confirm the sound insulating effect of the sound insulating weather strip 10 according to the present invention.
The results are shown in FIGS. FIG. 20 shows a sound-insulating weatherstrip 10 according to the present invention (indicated by ●).
7 is a graph showing a difference in sound transmission loss between a conventional weatherstrip 10 (indicated by △) and a conventional weatherstrip 10 (shown by Δ). As shown in this graph, the transmission loss of the sound insulating weather strip 10 according to the present invention is larger than that of the conventional weather strip 10 for sounds of any frequency. That is, the present invention is more excellent in sound insulation.

FIG. 21 shows the results of the transmission loss experiment shown in FIG. 20 in which the weatherstrip 10 of the present invention and the conventional weatherstrip 3 for sound having a frequency of 1 to 2 kHz.
It shows an overall value (OA value) of 0.
It can be seen that the numerical value of the present invention is higher and therefore the sound insulation is excellent.

[0031]

According to the first invention, the hollow seal portion 11
Since the highly foamed sponge material 17 is provided in a portion that is compressed by being sandwiched between the door window frame 20 and the body panel 21 when the door is closed, it is possible to reliably prevent sound outside the vehicle from entering the room.

Further, in the weather strip 10 according to the first invention, the high foamed sponge material 17 has a uniform density at the time of extrusion molding, but the door window frame 20 and the body panel 2 have a uniform density.
When compressed by being sandwiched between them, the interior 40 has a high compression due to a large amount of compression, and the outside 50 has a low compression due to a small compression, so that both the sound absorbing effect and the reflection scattering effect are obtained. Thus, the intrusion of sound can be reliably prevented. Further, the present invention relates to the hollow portion 1 of the hollow seal portion 11.
By providing an air layer in 3, the sound insulation effect can be enhanced.

The second aspect of the invention has the effect of improving the door closing force little in addition to the effect of the first aspect of the invention.

The third aspect of the invention has the effect of further improving the door closing force in addition to the effect of the second aspect of the invention.

The fourth invention has an effect that the weather strip manufacturing cost is low in addition to the operation and effect of the third invention. (Compared to a case where a separate high-foam sponge is integrated with adhesive etc.)

[Brief description of the drawings]

FIG. 1 is a side view showing an automobile to which a weather strip is attached.

FIG. 2 shows a conventional example, and is a cross-sectional view taken along line AA in FIG.

FIG. 3 shows a conventional example, and is a cross-sectional view taken along line BB in FIG.

4 shows a first embodiment of a weather strip according to the present invention, and is a cross-sectional view taken along line AA in FIG.

5 is a cross-sectional view showing a state when the door of the present invention shown in FIG. 4 is closed.

FIG. 6 shows a second embodiment of the weather strip according to the present invention, and is a cross-sectional view taken along the line BB in FIG.

7 is a cross-sectional view showing a state when the door of the present invention shown in FIG. 6 is closed.

8 shows a third embodiment of the weather strip according to the present invention, and is a cross-sectional view taken along line AA in FIG.

9 shows an embodiment of an opening weather strip according to the present invention, and is a cross-sectional view taken along the line CC in FIG. 1. FIG.

FIG. 10 is a sectional view showing another embodiment of the opening weather strip according to the present invention.

FIG. 11 is a perspective view of a hardtop vehicle.

FIG. 12 is a sectional view taken along line DD of FIG. 11 showing an example of the hard top weather strip.

FIG. 13 is a sectional view taken along line DD of FIG. 11, showing the other side of the hard top weather strip.

FIG. 14 is a partial perspective view of another automobile.

FIG. 15 is a sectional view taken along line EE of FIG. 14 showing an example of the drip weather strip.

FIG. 16 is a sectional view taken along line EE of FIG. 14 showing another example of the drip weather strip.

FIG. 17 is a perspective view of still another automobile viewed from the rear.

FIG. 18 is an FF cross-sectional view showing an example of a trunk weather strip with the trunk door of FIG. 17 closed.

FIG. 19 is a sectional view taken along line FF of FIG. 17 showing another example of the trunk weather strip.

FIG. 20 is a graph showing a comparison of transmission loss between the present invention and a conventional example.

FIG. 21 is a graph showing a comparison between overall values of the present invention and a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Sound insulation weather strip 11 Hollow seal part 12 Seal part 13 Hollow part 14 Base part 15 Lip part 16 Small lip part 17 High foaming sponge material 17a Close sponge part 17b Coarse sponge part 20 Door window frame 20a Glass 20b Door panel 21 Body panel 22 Roof 23 Center pillar 24 Body flange 30 Weather strip 31 Hollow seal part 32 Base part 33 Lip part 34 Small lip part 40 Indoor side 50 Car outside 60 Opening weather strip 61 Hollow seal part 62 Trim main body 63 Claw part 64 Hollow part 65 Core metal 70 Hard Top weather strip 80 Drip weather strip 90 Trunk weather strip

Claims (4)

[Claims] 1. A door (20) and a body panel (21).
Hollow seal part (1) attached to at least one of
In a weather strip for an automobile having 1),
A high-foam sponge material (17) made of rubber or synthetic resin is provided in a portion of the hollow seal portion (11) which is compressed by being sandwiched between the door or glass (20) and the body panel (21) when the door is closed. Sound insulation weather strip. 2. The sound insulating weatherstrip according to claim 1, wherein the high foam sponge material has a specific gravity smaller than that of the hollow seal. 3. The high-foam sponge material (17) has a specific gravity of 0.1.
The sound insulating weather strip according to claim 1, wherein the number is 1 to 0.3. 4. A sound insulating weatherstrip according to claim 1, wherein the highly foamed sponge material (17) is extruded integrally with the hollow seal portion.