JPH1024738A - Automotive weather strip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the warp deformation of a lip portion during extrusion molding while improving appearance and solvent resistance in a weather strip for sealing between an automobile body and a door. Reduce position variation and man-hour for designing the base. SOLUTION: An attachment base 12 attached to a door peripheral portion 2a, a hollow portion extending from the attachment base 12 and sealing between a door opening 3, and an attachment base outside the hollow portion 14 outside the vehicle compartment. The lip 16 protrudes from the lip 12, and at least the tip of the lip 16 is made of solid rubber.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weather strip which is mounted on a main body or a door of an automobile and seals between the main body and the door.

[0002]

2. Description of the Related Art A weather strip for sealing between a vehicle body and a door includes a mounting base attached to the body or the door and a seal extending from the mounting base and sealing the space between the door or the body. There is a hollow part and a lip part protruding from a mounting base outside the vehicle interior of the hollow part. Here, when the door is closed, the hollow portion is in contact with the door or the vehicle body to maintain airtightness, and in the same state, the lip portion is in contact with the door or the vehicle body to improve watertightness. Playing a role.

In such a conventional weather strip, since the lip portion located outside the cabin of the hollow portion is made of sponge rubber, there is a problem that the appearance and the solvent resistance are poor. In order to solve the problem, a proposal has been made to provide a solid rubber layer on the outer surface of the vehicle compartment at the lip portion (Japanese Utility Model Laid-Open No. 63-64522).

That is, as shown in FIG. 7, a mounting base 101 which is mounted on a door peripheral portion 104 of an automobile, and a door opening 1 of the vehicle body extending from the mounting base 101 are provided.
In the weather strip 100 including the hollow portion 102 abutting on the inner portion 05 and the lip portion 103 protruding from the mounting base 101 outside the vehicle compartment of the hollow portion 102, the lip portion 103 made of sponge rubber is thin on the vehicle outside surface. The solid rubber layer 110 is provided to improve the appearance and the solvent resistance.

[0005]

However, when the solid rubber layer 110 is provided on the lip portion 103 made of sponge rubber as described above, rubber having a different foaming ratio is present back to back, so that the extrusion of the weather strip 100 is performed. At the time of molding, as shown in FIG. 8, there is a problem that the lip portion 103 is greatly warped. Therefore, manufacturing conditions such as variation in the amount of extruded rubber greatly affect the degree of deformation of the warp deformation, and the variation in the position of the lip portion 103 (variation in the position with respect to the door opening portion 105 abutting when the door is closed) is large. There's a problem. Also, due to the warp deformation of the lip portion 103, the shape of the lip portion of the extrusion die and the shape of the lip portion of the product are greatly different. Therefore, before the mass production of the weather strip 100, the shape of the die is optimized. There is a problem that a large number of man-hours is required, that is, a large number of man-hours for designing a die.

Accordingly, the present invention is directed to a weather strip for sealing between an automobile body and a door by improving the appearance and solvent resistance and reducing the warp deformation of a lip during extrusion molding. The purpose is to reduce positional variations and man-hours for designing the base.

[0007]

According to the present invention, there is provided a weather strip for a vehicle, which is a weather strip for sealing between a vehicle body and a door, and which is attached to the body or the door. A base portion, a hollow portion extending from the mounting base portion and sealing between the door or the main body, and a lip portion protruding from the mounting base portion outside the vehicle compartment of the hollow portion; Is characterized in that at least the tip is made of solid rubber.

By forming at least the tip portion of the lip portion from solid rubber as described above, the appearance and the solvent resistance can be improved, and a solid rubber layer is provided on the lip portion as in the conventional case described above. Thus, warpage of the lip portion during extrusion molding can be reduced. Therefore, it is possible to reduce the variation in the position of the lip portion due to the warp deformation, and to reduce the number of design steps of the extrusion die. Further, with the above-described configuration, it is possible to reduce the grass whistling sound during high-speed running.

According to a second aspect of the present invention, there is provided a weather strip for an automobile.
The lip according to claim 1, wherein the lip is made of only solid rubber.

This makes it possible to further reduce the warp deformation of the lip portion, thereby further reducing the variation in the position of the lip portion and the man-hour for designing the extrusion die. In addition, it is possible to eliminate grass whistling sound during high-speed running.

According to a third aspect of the present invention, there is provided a weather strip for an automobile,
2. The device according to claim 1, wherein the lip portion is made of solid rubber, and a sponge rubber layer is provided on a part of the interior of the vehicle compartment.

Thus, it is possible to eliminate the rubbing noise generated between the lip portion and the door or the automobile body that comes into contact with the lip portion.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of an automobile weather strip 10 according to a first embodiment of the present invention.

As shown in FIG. 2, the weather strip 10 is mounted on the entire periphery of the door 2 of the vehicle 1 and, when the door 2 is closed, the door opening of the vehicle body is closed. 3 to seal between the door peripheral edge 2 a and the door opening 3.

As shown in FIG. 1, the weather strip 10 has a mounting base 12 which is mounted on the door peripheral edge 2a.
A hollow portion 14 extending from the mounting base 12 toward the vehicle interior, and a lip portion 16 protruding from the mounting base 12 outside the hollow portion 14 outside the vehicle compartment.

When the door 2 is in the closed state, the hollow portion 14
The lip 16 is in contact with the door opening 3 to maintain the airtightness between the door 2 and the vehicle body. In contact therewith, water is prevented from entering the hollow portion 14 from outside the cabin.

The mounting base 12 and the hollow portion 14 are
Normally, the lip portion 16 is made of only solid rubber, while it is made of sponge rubber.

In this weather strip 10, since the lip portion 16 is made of solid rubber, it has excellent appearance and solvent resistance. In addition, since the entire lip portion 16 is made of solid rubber, the warp deformation of the lip portion 16 during extrusion molding of the weather strip 10 can be significantly reduced. Therefore, it is possible to reduce the variation in the position of the lip portion 16 due to the warpage deformation, and to facilitate the design of the extrusion die, thereby reducing the design man-hour. Furthermore, lip 1
6 is made of solid rubber, it is possible to eliminate the flute noise generated when the lip portion 16 is turned by wind pressure during high-speed running.

FIG. 3 is a sectional view of an automobile weather strip 20 according to a second embodiment of the present invention.

In this embodiment, a thin sponge rubber layer 2 is formed on the wall of the lip portion 16 made of solid rubber except for the tip portion 16a on the vehicle interior side.
2 is different from the above-described first embodiment.

The sponge rubber layer 22 is configured to come into contact with the door opening 3 when the door 2 is closed, thereby producing a rubbing sound generated between the door opening 3 and the lip portion 16. Can be eliminated.

As described above, the lip portion 16 is not limited to only the lip portion 16 entirely made of solid rubber, and if at least the tip portion 16a is made of solid rubber, the lip portion 16 during extrusion molding can be formed. The warpage of the portion 16 can be reduced.

That is, as shown in FIG.
6, the length of the protrusion (the length from the tip of the lip portion 16 to the base 16b) is L, and the length of the solid rubber portion composed of only the solid rubber of the lip portion 16 (the tip of the sponge rubber layer 22 from the tip of the lip portion 16) If M is set to 0.2 L or more, preferably 0.3 L or more, the warp deformation of the lip portion 16 during extrusion molding can be reduced. Here, since the projection length L of the lip portion 16 is usually about 10 mm, the length M of the solid rubber portion may be set to 2 mm or more, preferably 3 mm or more.

FIG. 5 is a sectional view of an automobile weather strip 30 according to a third embodiment of the present invention.

This embodiment differs from the above-described second embodiment in that the thickness of the base 16b of the lip 16 is at least twice as large as the thickness near the tip 16a.

That is, as shown in FIG.
6, the thickness of the base 16b is T1 and the thickness at a position corresponding to a length of 0.3 L from the tip of the lip portion 16 is T2.
, T1 is set to be at least twice as large as T2.

As described above, the base 16b of the lip 16
Of the lip portion 16 during extrusion molding can be further reduced by increasing the thickness of the lip portion 16 so that the thickness of the lip portion 16 is at least twice the thickness in the vicinity of the tip portion 16a. Can be further reduced.

In each of the above embodiments, the description has been given of the weather strip mounted on the door peripheral portion 2a of the automobile 1. However, the present invention is not limited to the weather strip mounted on the door, but may be applied to a vehicle body. The present invention can also be applied to a weather strip attached to the side, that is, the door opening 3. In that case, the attachment base 12 is attached to the door opening 3, and the hollow portion 14 and the lip portion 16 are configured to abut on the door peripheral portion 2 a.

[0030]

According to the weather strip for automobiles of the present invention, at least the front end of the lip is made of solid rubber, so that the appearance and the solvent resistance can be improved while the lip during extrusion is improved. Warpage deformation can be reduced. Therefore, it is possible to reduce the variation in the position of the lip portion due to the warp deformation, and to reduce the number of design steps of the extrusion die. Further, it is possible to reduce grass whistling sound during high-speed running.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a weather strip 10 for an automobile according to a first embodiment of the present invention, which is taken along a line AA in FIG.
It shows a cross section.

FIG. 2 is a schematic side view of the automobile 1 showing the weather strip 10 mounted on the vehicle.

FIG. 3 is a sectional view of an automobile weather strip 20 according to a second embodiment.

FIG. 4 is an enlarged cross-sectional view of a main part of the lip portion 16 of the weather strip 20;

FIG. 5 is a sectional view of an automobile weather strip 30 according to a third embodiment.

FIG. 6 is an enlarged sectional view of a main part of the lip portion 16 of the weather strip 30;

FIG. 7 is a cross-sectional view of a conventional automobile weather strip 100.

FIG. 8 is a cross-sectional view showing a state in which a lip portion of a conventional automobile weather strip 100 is warped and deformed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Automobile 2 ... Door 2a ... Door periphery 3 ... Door opening 10,20,30 ... Automobile weatherstrip 12 ... Mounting base 14 ... Hollow part 16 ... Lip 16a ... Lip 16b: Root of lip 22: sponge rubber layer

Claims (3)

[Claims] 1. A weather strip for sealing between a body and a door of an automobile, comprising: a mounting base attached to the body or the door; and a sealing base extending from the mounting base and connected to the door or the body. And a lip protruding from the mounting base outside the cabin of the hollow, and at least a tip of the lip is made of solid rubber. strip. 2. The automotive weather strip according to claim 1, wherein said lip portion is made of only solid rubber. 3. The automobile weather strip according to claim 1, wherein said lip portion is made of solid rubber, and a sponge rubber layer is provided on a part of the interior side of said lip.