JP3293454B2 - Automotive weather strip - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weatherstrip for an automobile, and more particularly to a weatherstrip attached to a door of an automobile for sealing between the door and a vehicle body.

[0002]

2. Description of the Related Art Conventionally, various types of weather strips have been proposed (Japanese Utility Model Publication No. 7-51374, etc.), but a seal is provided between an outer peripheral portion of an automobile door and a peripheral portion of a door opening of a vehicle body. Weather strip is configured as follows.

That is, as shown in FIG. 8, for example, an upper portion of a door and an upper portion (a ceiling edge portion) of a peripheral portion of a door opening.
, The weatherstrip 50 includes a mounting base 52 attached to a door 51 and a hollow main seal portion 53.
And a seal lip 54. These 52-5
Reference numeral 4 is integrally formed by a known extrusion molding method using a rubber material such as EPDM. The mounting base 52 is fixed by being fitted into a retainer 55 above the door 51. Further, the main seal portion 53 is formed above the mounting base 52. Then, when the door 51 is closed, the main seal portion 53 can be deformed by contacting the door opening peripheral portion 57 of the vehicle body 56 substantially on the upper surface. This crushing deformation increases the contact area of the hollow main seal portion 53 and seals the space between the door 51 and the vehicle body 56.

[0004] The seal lip 54 is attached to the mounting base 52.
Is provided to extend upward on the outside of the vehicle. The seal lip 54 has a part on the base end side abutting on the door 51 and, when the door 51 is closed, the front end portion thereof is a door opening peripheral portion 57 of the vehicle body 56.
Can be brought into contact with the edge portion 59. By contacting the tip of the seal lip 54 with the edge portion 59, the space between the door 51 and the vehicle body 56 is further auxiliaryly sealed.

[0005]

However, the above-mentioned prior art has the following problems. That is,
When mounting the door 51 to the vehicle main body 56, an error in mounting may occur between individual vehicles. Among such errors, in particular, when an error occurs such that the door 51 is mounted slightly upward and toward the inside of the vehicle, as shown in FIG. There was a risk that the material would protrude outward and become a so-called mouth opening.

When the tip of the seal lip 54 protrudes outside the vehicle, there is a possibility that the sealing performance may be deteriorated, or that noise may be generated due to flapping of the tip. . In addition, there was a possibility that the appearance would be significantly impaired by the protrusion. Furthermore, rainwater or the like remains as water droplets in the portion where the mouth is opened, and there is a risk that the water droplets may enter the vehicle interior when the door is opened.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a weather strip which is attached to a door of an automobile and seals between the door and the vehicle body. It is an object of the present invention to provide a weather strip for an automobile that can prevent a decrease in sealing performance and generation of abnormal noise even when an error in mounting occurs, and can prevent a reduction in appearance quality.

[0008]

In order to achieve the above object, according to the first aspect of the present invention, a mounting base attached to a door, and a mounting base integrally formed with the mounting base,
When the door is closed, a hollow main seal portion that can be deformed by contacting a door opening peripheral portion of the vehicle body, and formed integrally with the mounting base portion, which is located on the vehicle outside of the main seal portion, When the door is closed, a weather lip for an automobile having a seal lip whose front end can abut against an edge of a door opening peripheral portion of a vehicle body, wherein a base end of the seal lip has at least a vehicle exterior side. A rear seal lip is provided in which a part of the extension itself contacts the door, and the base end of the seal lip is disposed on the vehicle inner side with respect to the rear seal lip.
The end has a bay at least when the door is open.
The door is curved and the door is open when the door is opened.
The radius of curvature of the tip of the seal lip is
The gist is to make the radius of curvature smaller than the radius of curvature of the edge portion of the peripheral edge of the door opening .

[0009]

[0010]

According to the second aspect of the present invention, in the weather strip for an automobile according to the first aspect, a connecting portion for connecting a front end portion of the back seal lip and an intermediate position of the seal lip is formed. The gist is that they did.

(Operation) According to the first aspect of the present invention, the weather strip is attached to the door at the mounting base. When the door is closed, the hollow main seal portion formed integrally with the mounting base portion can be deformed by contacting the peripheral edge of the door opening of the vehicle body. The deformation between the main seal portion seals between the door and the vehicle body.
When the door is closed, the tip of the seal lip, which is formed on the outside of the vehicle relative to the main seal portion and is integrally formed with the mounting base, abuts on the edge of the peripheral edge of the door opening of the vehicle body. Can touch. For this reason, the contact between the door end and the vehicle body is further assisted by the contact of the seal lip tip.

By the way, when the door is mounted on the vehicle main body, the door may be mounted (attached) with the door shifted toward the vehicle main body side (upper side) and inside the vehicle. In such a case, the presence of the rear seal lip provided at the base end of the seal lip and located on the vehicle exterior side of the seal lip makes the appearance of the seal lip pushed into the vehicle interior. For this reason, the tip of the seal lip does not protrude to the outside of the vehicle, but rather enters the inside of the vehicle, and strongly contacts the edge of the vehicle body.

Further, the distal end portion of the front Symbol sealing lip, at least because they are curved inside the vehicle in the open when the door abuts in a strong surface when distal end is in contact with the edge portion of the vehicle body It will be.

Furthermore, the radius of curvature of the tip portion of the seal lip in the open when the door is smaller than the radius of curvature of the edge portion of the vehicle body. Therefore, when the leading end portion of the main seal portion is in contact with the edge portion of the door opening peripheral edge portion,
The state is such that the tip portion is spread out, and the above-mentioned operation is more reliable.

In addition, according to the second aspect of the present invention,
In addition to the effect of the first aspect of the present invention, since a connecting portion for connecting the substantially distal end portion of the back seal lip and the substantially middle position of the seal lip is formed, the back seal lip, the seal lip, and the connecting portion separately provide the connecting portion. A hollow portion will be formed. For this reason, as described above, when the door is mounted with the vehicle body side (upper side) and shifted to the vehicle interior, and when the door is closed, first, the main seal portion is crushed and deformed. , A part of which can abut a seal lip separately forming a hollow portion. At this time, due to the presence of the connecting portion, the seal lip receives stress about the contact point of the main seal portion as a fulcrum via the rear seal lip and the connecting portion, and the tip portion is bent toward the inside of the vehicle by "leverage principle". No. Therefore, the sealing performance is further improved.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG.
FIG. 3 is a side view schematically illustrating the automobile according to the present embodiment, and FIG. 3 is a cross-sectional view taken along line AA of FIG. As shown in these figures, the weather strip W1 has a long shape,
It is provided for sealing between the upper part of the door 1 of the automobile and the vehicle body 2 (the edge of the ceiling).

That is, the weather strip W1 has a mounting base 3 attached to the door 1, a hollow main seal portion 4, and a seal lip 5, and these are made of a rubber material such as EPDM sponge. By being used, it is integrally formed by a known extrusion molding method.
More specifically, the mounting base 3 is provided with a retainer 6 above the door 1.
It is fixed by being fitted into. Also,
The main seal portion 4 is formed above the mounting base 3. When the door 1 is closed, the main seal portion 4 can be deformed on the surface (substantially the upper surface) opposite to the mounting base portion 3 by abutting the door opening peripheral portion 7 of the vehicle body 2. This crushing deformation basically seals the space between the door 1 and the vehicle body 2.

The seal lip 5 is provided so as to extend upward on the outside of the vehicle with the mounting base 3 as a base end. When the door 1 is closed, the tip of the seal lip 5 can abut on the edge 9 of the peripheral edge 7 of the door opening of the vehicle body 2. The distal end portion of the seal lip 5 abuts on the edge portion 9 so that the space between the door 1 and the vehicle body 2 is further auxiliaryly sealed.

Next, the features of this embodiment will be described. As shown in FIGS. 1 and 3, a rear seal lip 8 is provided at the base end of the seal lip 5, the rear seal lip 8 extending to the outside of the vehicle and having its front end abutting on the door 1. The base end of the seal lip 5 is located on the vehicle interior side with respect to the rear seal lip 8. Since the front end of the rear seal lip 8 is in contact with the door 1, intrusion of water or the like from outside the vehicle is restricted.

As shown in FIG. 1, the tip of the seal lip 5 is formed to be curved toward the inside of the vehicle at least when the door 1 is opened. In particular, the radius of curvature R1 of the tip portion is formed smaller than the radius of curvature R2 of the edge portion 9 of the vehicle body 2.

Next, the operation and effect of the embodiment constructed as described above will be described. First, door 1
When the door 1 is mounted on the vehicle main body 2, the door 1 may be mounted with the door 1 shifted toward the vehicle main body 2 (upper side) and toward the inside of the vehicle. In such a case, conventionally, there has been a risk that the tip of the seal lip may protrude to the outside of the vehicle. On the other hand, in the present embodiment, as shown in FIG. 4, the presence of the back seal lip 8 makes the appearance of the seal lip 5 pushed into the vehicle interior. For this reason, the tip of the seal lip 5 does not protrude to the outside of the vehicle, but rather enters the inside of the vehicle, and strongly contacts the edge 9 of the vehicle body 2.

(A) Therefore, even if a slight error occurs when the door 1 is mounted, the tip of the seal lip 5 does not protrude to the outside of the vehicle. . Further, since the tip does not protrude, water drops remain between the tip of the seal lip 5 and the edge portion 9, and the water drops do not enter the vehicle when the door 1 is opened and closed.

(B) Further, since there is no protruding portion, the tip of the seal lip 5 does not flutter during traveling. Therefore, generation of abnormal noise due to the fluttering can be prevented.

(C) Further, it is possible to prevent the appearance quality from being deteriorated due to the presence of the protruding portion. (D) In addition, in the present embodiment, the distal end of the seal lip 5 is formed to be curved toward the inside of the vehicle at least when the door 1 is opened, and the distal end of the seal lip 5 when the door 1 is opened. The curvature radius R1 of the portion is made smaller than the curvature radius R2 of the edge portion 9 of the vehicle body 2. For this reason, the tip of the seal lip 5 is
When it comes into contact with the edge portion 9, the tip portion is in a state of being spread out, and can come into strong contact with the surface. As a result, the sealing performance can be further improved.

(Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIGS. However, the basic configuration and the like of the present embodiment are almost the same as those of the above-described first embodiment, so that the same members and the like are denoted by the same reference numerals and description thereof is omitted. The following description focuses on the differences from the first embodiment.

As shown in FIGS. 5 and 6, the weather strip W2 in the present embodiment also includes a mounting base 3, which is attached to the door 1, a hollow main seal 4, a seal lip 5, and a back seal. And a lip 8. In addition, a connecting portion 11 is provided so as to connect a substantially distal end portion of the back seal lip 8 and a substantially intermediate position of the seal lip 5. Due to the presence of the connecting portion 11, a hollow portion is separately formed by the back seal lip 8, the seal lip 5, and the connecting portion 11 in addition to the hollow portion of the main seal portion 4.

In this embodiment, basically, the same operation and effect as those of the first embodiment can be obtained. In addition, as shown in FIG. 7, when the door 1 is mounted with the door 1 shifted toward the vehicle body 2 (upper side) and inside the vehicle and the door 1 is closed, First,
The main seal portion 4 is crushed and deformed, and a part of the main seal portion 4 can abut on the seal lip 5 separately forming a hollow portion. At this time, due to the presence of the connecting portion 11, the seal lip 5 receives a stress with the contact point of the main seal portion 4 as a fulcrum via the back seal lip 8 and the connecting portion 11. for that reason,
The tip of the seal lip 5 bends toward the inside of the vehicle by the "lever principle", and strongly contacts the edge 9. Therefore, the sealing performance is further improved, and the above-described operation and effect can be further ensured.

It should be noted that the present invention is not limited to the above-described embodiments, and may be implemented as follows by appropriately changing a part of the configuration without departing from the spirit of the invention. (1) In each of the above embodiments, the rear seal lip 8 is configured to temporarily extend from the base end side toward the door 1 and further extend upward, but extends toward the door 1. Any shape may be used as long as it is in contact with the door 1. For example,
A configuration may be employed in which the portion extending upward is omitted, or a configuration extending downward.

(2) In each of the above embodiments, EPDM sponge rubber is used as a material forming the weather strips W1 and W2. However, any material may be used as long as it is a rubber material or an elastic resin material applicable as the weather strip. May be adopted. In addition, for example, only the main seal portion 4 may be formed of sponge rubber, and the other portions may be formed of solid rubber.

(3) In each of the above embodiments, the description has been omitted. However, the present invention can be applied to a case where another member such as a drip molding is separately attached to a portion corresponding to the edge portion 9 of the vehicle body 2. Does not deviate from

[0032]

As described in detail above, according to the present invention,
In a weatherstrip that is attached to the door of an automobile and seals between the door and the vehicle body, even if an error occurs in the installation of the door, it is possible to prevent the deterioration of sealing performance and the generation of abnormal noise and to improve the appearance An excellent effect of being able to prevent the reduction is brought about.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a weather strip according to a first embodiment when a door is opened.

FIG. 2 is a side view schematically showing a vehicle.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a cross-sectional view of a weather strip illustrating an operation in a state where the door is shifted toward the vehicle body and toward the inside of the vehicle.

FIG. 5 is a cross-sectional view illustrating a weather strip according to a second embodiment when the door is opened.

FIG. 6 is a sectional view showing a weather strip and the like when the door is closed.

FIG. 7 is a cross-sectional view of a weather strip illustrating an operation when the door is shifted toward the vehicle body and toward the inside of the vehicle.

FIG. 8 is a cross-sectional view showing a weather strip and the like in a conventional technique.

FIG. 9 is a cross-sectional view for explaining a problem in the related art.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Door, 2 ... Vehicle main body, 3 ... Mounting base, 4 ... Main seal part, 5 ... Seal lip, 7 ... Door opening peripheral part, 8 ...
Back seal lip, 9 ... edge, 11 ... connection.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B60J 10/08

Claims (2)

(57) [Claims] 1. A mounting base (3) attached to a door (1).
A hollow main seal portion formed integrally with the mounting base portion (3) and capable of abutting against a door opening peripheral portion (7) of the vehicle body (2) when the door (1) is closed and deforming. And (4) being formed integrally with the mounting base (3) at a position outside the vehicle with respect to the main seal portion (4), and when the door (1) is closed, its own front end has a vehicle body ( 2) A weatherstrip for a vehicle comprising a sealing lip (5) capable of abutting an edge (9) of a peripheral edge (7) of a door opening, wherein at least a vehicle is provided at a base end of the sealing lip (5). A rear seal lip (8) extending outward and partially abutting on the door (1) is provided, and a base end of the seal lip (5) is disposed on the vehicle interior side with respect to the rear seal lip (8). The tip of the seal lip (5)
Curved toward the inside of the vehicle at least when the door (1) was opened
And when the door (1) is opened,
Radius of curvature (R1) at the tip of the seal lip (5)
Of the vehicle body (2) at the periphery of the door opening (7).
A weatherstrip for an automobile, wherein the radius of curvature (R2) of the portion (9) is smaller than the radius of curvature (R2) . 2. The tip of said back seal lip (8).
And a link connecting the intermediate position of the seal lip (5).
2. The connecting part according to claim 1, wherein the connecting part is formed.
Onboard weatherstrip.