JP2001328437A - Weatherstrip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a weatherstrip maintaining excellent sealing performance with extremely compact constitution. SOLUTION: This weatherstrip has a base part, a main seal part, a first seal lip part and a second seal lip part. The second seal lip part is so molded that a first auxiliary seal part is disposed at an undercut part and gradually reduced in the thickness of the rear end part. Further, a second auxiliary seal part is stuck in such a manner that the tip part of the second auxiliary seal part slightly overlaps the rear end part outer surface of the first auxiliary seal part. The second auxiliary seal part thereby makes up for a part where the first auxiliary seal part does not exist, and step difference from the outer peripheral end face of a door panel without a retainer is kept small by the gradually reduced thickness of the rear end part of the first auxiliary seal part. As a result, sealing performance around the base part can be properly maintained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weatherstrip mounted around the outside of a door of a vehicle to seal between the door and the vehicle body, and more particularly to a weatherstrip fixed to an outer peripheral end surface of a retainerless door panel. is there.

[0002]

2. Description of the Related Art In recent years, in a door panel of a vehicle, particularly a passenger car, a so-called retainer formed by projecting a pair of locking pieces formed by pressing a cross-sectional shape of a substantially circular arc on an outer peripheral end surface thereof, Retainerless door panels are used. As shown in FIGS. 4 and 5, a relatively linear and long area on the outer peripheral end surface of the retainerless door panel RLDP is generally formed by extruding a synthetic rubber material made of an ethylene propylene rubber material and / or a so-called synthetic resin material. While the extruded weather strip 18 is mounted, a relatively short curved outer peripheral end surface of the retainerless door panel RLDP is basically provided except for a portion whose cross-sectional shape is slightly deformed as compared with the extruded weather strip 18. A so-called molded weather strip 19 molded from a synthetic rubber material made of an ethylene propylene rubber material and / or a synthetic resin material is attached so as to make the general shape substantially the same.

The end of the extruded weather strip 18 after the extrusion is inserted into a molding die, and the extruded weather strip 18 is joined at a joining portion J with the molding of the molded weather strip 19. Integration was planned. Further, each member constituting the integrated weather strip 10 will be described in detail below. That is, the weatherstrip 10 is first used as a member of the extruded weatherstrip 18 by the retainerless door panel RL.
A base portion 11 fixed to the outer peripheral end surface of the DP;
1 to promote the elasticity of the other members of the weather strip, and from the auxiliary hollow portion 12 for accommodating the head of the clip portion CL, the door opening defined by the body panel BP. A hollow main seal portion 13 protruding toward an inner peripheral end surface, and a first seal lip portion protruding from the base portion 11 to an inner peripheral edge of the door opening adjacent to the main seal portion 13. 14 and a second seal lip portion 15 protruding from the base portion 11 toward the inner side surface of the retainerless door panel RLDP adjacent to the first seal lip portion 14.

The second seal lip portion 15 has an undercut portion 15a continuous with the outer bottom surface of the base portion 11 facing the outer peripheral end surface of the retainerless door panel RLDP. The first auxiliary seal portion 16 is arranged and is formed by extrusion molding integrally with the undercut portion. Further, the molded weather strip 19 is formed by the extruded weather strip 18.
The points different from those of the first embodiment are that a hole (not shown) for removing the core during molding is set, the undercut portion 15a is recessed, and the first auxiliary seal portion 16 is disposed. There was no point. Further, instead of the first auxiliary seal portion 16, the second auxiliary seal portion 17 is attached along the longitudinal direction of the outer bottom surface of the base portion 11. The first auxiliary sealing portion 16 is integrally formed by extrusion as a part of the extruded weather strip 18, is made of an ethylene propylene sponge rubber material, and has a specific gravity of 0.1 to 0.3. And the second auxiliary seal portion 17
After the extruded weather strip 18 and the molded weather strip 19 are integrally formed, they are glued to the weather strip 10 as separate bodies.
Made of sponge rubber material and its thickness is 3-10mm
And a tape-shaped caulking sponge rubber material.

[0005] As a method of connecting the first auxiliary seal portion 16 and the second auxiliary seal portion 17, there are the following methods. First, as shown in FIG. 6, the second auxiliary seal portion 17 is attached to the first auxiliary seal portion 16 at the same position in cross section, and the end of the second auxiliary seal portion 17 is further attached. And a method in which the first auxiliary seal portion 16 is connected just above the end portion of the first auxiliary seal portion 16 by running over the end portion. Next, as shown in FIG. 7, the second auxiliary seal portion 17 is attached to the first auxiliary seal portion 16 at the same position in cross section, and further, an end portion of the second auxiliary seal portion 17 is provided. Is terminated immediately before the end of the first auxiliary seal portion 16. Finally, as shown in FIG.
6, the second auxiliary seal portion 17 is attached to the vehicle interior in cross section, and the end of the second auxiliary seal portion 17 is extended from the end position of the first auxiliary seal portion 16. There is a method.

[0006]

However, in the conventional weather strip 10, the second auxiliary seal portion 17 is attached to the first auxiliary seal portion 16 as shown in FIGS. Had the following problems.

That is, in the method shown in FIG.
A gap G is generated between the end of the auxiliary seal portion 16 and the second auxiliary seal portion 17, and it is impossible to prevent dive water when attached to the door panel RLDP. In the method shown in FIG.
A gap G is generated between the end of the first auxiliary seal portion 16 and the end of the second auxiliary seal portion 17, and cannot prevent dive when attached to the door panel RLDP. Here, in theory, an intermediate way between FIGS. 6 and 7 is to prevent the gap G from being generated between the end of the first auxiliary seal 16 and the second auxiliary seal 17. It suffices to match them, but this is not a practical problem because there is a variation in the length of the second auxiliary seal portion 17 and a variation in the attachment position of the second auxiliary seal portion 17 in the longitudinal direction. Further, in the method shown in FIG. 8, a gap G is generated between the end of the first auxiliary seal portion 16 and the second auxiliary seal portion 17,
When attached to the door panel RLDP, diving cannot be prevented. Here, in theory, the second auxiliary sealing portion 16 is attached to the second auxiliary sealing portion 16 in an intermediate manner between FIGS.
It suffices to bond the auxiliary seal portions 17 so that the gap G is not generated. However, since there is a variation in the mounting position of the second auxiliary seal portion 17 in the cross-sectional direction, this is not a practical problem.

An object of the present invention is to solve the above-mentioned problems of the prior art and to provide a weather strip which can maintain excellent sealing performance with an extremely compact structure.

[0009]

SUMMARY OF THE INVENTION An object of the present invention is to provide a base fixed to an outer peripheral end face of a retainerless door panel, and from the base toward an inner peripheral end face of a door opening defined by a body panel. A protruding hollow main seal portion, a first seal lip portion protruding from the base portion toward an inner peripheral edge of the door opening adjacent to the main seal portion, and a first seal lip portion protruding from the base portion. A second protruding toward the inner surface of the door panel adjacent to the seal lip portion;
In a weather strip having a seal lip portion,
The second seal lip portion is formed by arranging a first auxiliary seal portion in an undercut portion that is continuous with an outer bottom surface of the base portion, and by molding so that a thickness of a rear end portion is gradually reduced,
Further, the outer surface of the rear end portion of the first auxiliary seal portion is the second auxiliary seal portion.
The second auxiliary seal portion is adhered so as to be slightly overlapped by the tip portion of the auxiliary seal portion, and the base portion and the second seal lip portion are attached to the retainer-less seal portion.
This is achieved by a weather strip fixed to the outer peripheral end surface of the door panel.

Further, an object of the present invention is to provide a highly foamed sponge rubber material in which the first auxiliary seal portion is made of an ethylene propylene sponge rubber material and has a specific gravity of 0.1 to 0.3. This is achieved by a weatherstrip, wherein the second auxiliary seal portion is a tape-shaped caulking sponge rubber material having a thickness of 3 to 10 mm made of an ethylene propylene sponge rubber material.

[0011]

According to the weather strip of the present invention, the base portion fixed to the outer peripheral end surface of the retainerless door panel and the inner peripheral end surface of the door opening defined by the body panel from the base portion. The hollow main seal portion protruding from the base portion, the first seal lip portion protruding from the base portion toward the inner peripheral edge of the door opening adjacent to the main seal portion, and from the base portion. A second seal lip protruding toward an inner surface of the door panel adjacent to the first seal lip, wherein the second seal lip is continuous with an outer bottom surface of the base portion; The first auxiliary seal portion is disposed on the undercut portion to be formed, and is molded so that the thickness of the rear end portion is gradually reduced.
The second outer seal portion has a rear end outer surface slightly overlapped by the front end of the second auxiliary seal portion.
An auxiliary seal portion is attached, and the base portion and the second
Since the seal lip portion is fixed to the outer peripheral end face of the retainerless door panel, the second auxiliary seal portion complements a seal where the first auxiliary seal portion does not exist, and the outer peripheral surface of the retainerless door panel. The step with the end face is kept small by the gradually decreasing thickness of the rear end of the first auxiliary seal part, and as a result, the sealing around the base part is properly maintained.

Further, in the weather strip according to the present invention, the first auxiliary seal portion is made of a highly foamed sponge rubber material having an ethylene propylene sponge rubber material having a specific gravity of 0.1 to 0.3. The second auxiliary seal portion includes:
Since it is a tape-shaped caulking sponge rubber material made of ethylene propylene sponge rubber material and having a thickness of 3 to 10 mm, the second auxiliary seal portion is a joint portion with the first auxiliary seal portion. The gap G is more effectively absorbed and complemented, and the step with the outer peripheral end face of the retainerless door panel is kept smaller.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the weather strip of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a cross-sectional view showing an essential portion of a weather strip of the present invention mounted on an outer peripheral end surface of a retainerless door panel and in a door closed state, and FIG. 2 is mounted on an outer peripheral end surface of the retainerless door panel in a closed state. FIG. 3 is a perspective view showing a part of a weather strip of the present invention partially cut away, and FIG. 3 is a perspective view showing a part of a weather strip of the present invention at the time of molding. As shown in FIG.
A so-called extruded weatherstrip 28 extruded from a synthetic rubber material and / or a synthetic resin material, usually made of ethylene propylene rubber material, is attached to a relatively linear and long region of the outer peripheral end surface of the retainerless door panel RLDP, In the curved and relatively short region of the outer peripheral end surface of the retainerless door panel RLDP, the cross-sectional shape is substantially the same as the basic shape except for a portion slightly deformed as compared with that of the extruded weather strip 28. A so-called molded weatherstrip 29 molded from a synthetic rubber material and / or a synthetic resin material made of an ethylene propylene rubber material is mounted on the base.

As shown in FIG. 3, the end of the extruded weather strip 28 after the extrusion molding is inserted into a molding die MD, and the molded weather strip 29 is molded. Accordingly, the two are integrated at the joint J. Further, the integrated weather strip 2
The members constituting 0 are described below in detail. That is, the weatherstrip 20 first defines, as the extruded weatherstrip 28 member, a base 21 fixed to the outer peripheral end surface of the retainerless door panel RLDP, and a part of the base 21 to define the weatherstrip. Promote the elasticity of other members, and
L, a hollow main seal portion 23 protruding from an auxiliary hollow portion 22 accommodating the head portion of the head toward an inner peripheral end surface of a door opening defined by the body panel BP;
A first seal lip portion 24 protruding from the first to the inner peripheral edge of the door opening adjacent to the main seal portion 23;
And a second seal lip portion 25 protruding from the base portion 21 toward the inner side surface of the retainerless door panel RLDP adjacent to the first seal lip portion 24.

Further, the second seal lip portion 25 has an undercut portion 25a which is continuous with the outer bottom surface of the base portion 21 facing the outer peripheral end surface of the retainerless door panel RLDP, as shown in FIG. In addition, a first auxiliary seal portion 26 is arranged on the undercut portion 25a, and is integrally formed with the undercut portion 25a by extrusion molding. Also, the point that the molded weather strip 29 adopts a configuration different from that of the extruded weather strip 28 is as follows.
A hole (not shown) for removing the core during molding is set, the undercut portion 25a is recessed, and the first
The point is that the auxiliary seal portion 26 is not provided. Further, instead of the first auxiliary seal portion 26, a second auxiliary seal portion 27 is attached along the longitudinal direction of the outer bottom surface of the base portion 21. In addition, the first auxiliary seal portion 26 is formed by using the die MD having a gradually changing depth such that the thickness of the rear end portion gradually decreases.
The thickness of the rear end of the auxiliary seal portion 26 is gradually reduced. The first auxiliary seal portion 26 is integrally formed by extrusion as a part of an extruded weather strip 28, is made of an ethylene propylene sponge rubber material, and has a specific gravity of 0.1 to
The second auxiliary seal portion 27 is glued to the weather strip 20 as a separate body after the extruded weather strip 28 and the molded weather strip 29 are integrally molded. And a tape-like caulking sponge rubber material made of ethylene propylene sponge rubber material and having a thickness of 3 to 10 mm.

The second auxiliary seal portion 27 complements the seal at a location where the first auxiliary seal portion 26 does not exist, and also reduces the step between the outer peripheral end face of the retainerless door panel RLDP and the first auxiliary seal portion. Due to the gradually decreasing thickness of the rear end of the seal portion 26, it is kept small. As a result, as shown in FIG. 1 to FIG. 3, the undercut portion 25a and the retainerless
It only allows the dive water W to enter between the inner surface of the door panel RLDP.

[0017]

The weatherstrip of the present invention described above has the following novel effects. That is, the weatherstrip of the present invention is configured such that the base portion fixed to the outer peripheral end surface of the retainerless door panel and the inner peripheral end surface of the door opening defined by the body panel from the base portion. The hollow main seal portion protruding, the first seal lip portion protruding from the base portion toward the inner peripheral edge of the door opening adjacent to the main seal portion, and In the weather strip having a second seal lip protruding toward an inner surface of the door panel adjacent to a first seal lip, the second seal lip is continuous with an outer bottom surface of the base. The first auxiliary seal portion is disposed on the undercut portion, and is molded so that the thickness of the rear end portion is gradually reduced. The second auxiliary seal portion is attached so that an outer surface thereof is slightly overlapped by a tip portion of the second auxiliary seal portion, and the base portion and the second seal lip portion are formed on the retainerless door panel. Since the second auxiliary seal portion is fixed to the outer peripheral end surface, the second auxiliary seal portion complements the seal at a location where the first auxiliary seal portion does not exist, and the first auxiliary seal portion has a step with the outer peripheral end surface of the retainerless door panel. The lower thickness of the back end keeps it small, so that the sealing around the base can be maintained properly.

Further, in the weather strip of the present invention, the first auxiliary seal portion is made of a highly foamed sponge rubber material having an ethylene propylene sponge rubber material and a specific gravity of 0.1 to 0.3, The second auxiliary seal portion includes:
Since it is a tape-like caulking sponge rubber material made of ethylene propylene sponge rubber material and having a thickness of 3 to 10 mm, the second auxiliary seal portion is a joint portion with the first auxiliary seal portion. The gap G can be more effectively absorbed and supplemented, and the step with the outer peripheral end surface of the retainerless door panel can be kept smaller.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a main part of a weather strip of the present invention mounted on an outer peripheral end surface of a retainerless door panel and in a door closed state.

FIG. 2 is a perspective view, partially cut away, of a main part of the weather strip of the present invention mounted on the outer peripheral end surface of the retainerless door panel and in a door closed state.

FIG. 3 is a cross-sectional view showing a main part of the weatherstrip of the present invention in a door closed state after mounting.

FIG. 4 is a cross-sectional view showing a main part of a conventional weatherstrip mounted on an outer peripheral end surface of a retainerless door panel and in a door closed state.

FIG. 5 is a perspective view, partially cut away, of a main part of a conventional weatherstrip mounted on an outer peripheral end surface of a retainerless door panel and in a door closed state.

FIG. 6 is a perspective view showing an example of a method of connecting a first auxiliary seal portion and a second auxiliary seal portion of a conventional weather strip.

FIG. 7 is a perspective view showing another example of how to connect a first auxiliary seal portion and a second auxiliary seal portion of a conventional weather strip.

FIG. 8 is a perspective view showing still another example of a method of connecting a first auxiliary seal portion and a second auxiliary seal portion of a conventional weather strip.

FIG. 9 is a perspective view showing how to connect a first auxiliary seal portion and a second auxiliary seal portion of the weather strip of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 conventional weather strip 11 base portion 12 auxiliary hollow portion 13 main seal portion 14 first seal lip portion 15 second seal lip portion 15 a undercut portion 16 first auxiliary seal portion 17 second auxiliary seal portion 18 extrusion molded weather strip 19 Molded weather strip RLDP Retainerless door panel BP Body panel W Diving water CL Clip part J Joint part 20 Weather strip 21 Base part 22 Auxiliary hollow part 23 Hollow main seal part 24 First seal lip part 25 Second seal Lip part 25a Undercut part 26 First auxiliary seal part 27 Second auxiliary seal part 28 Extrusion weather strip 29 Mold weather strip MD Mold die

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Akira Yoshioka 300 Takatsukacho, Hamamatsu-shi, Shizuoka Suzuki Co., Ltd. F-term (reference) 3D024 AA06 AB03 AB17 AB21 AB24 AB33 AB41

Claims (2)

[Claims] 1. Retainerless door panel (RLDP)
A base portion (21) fixed to the outer peripheral end surface of the vehicle, and a hollow main seal portion () protruding from the base portion (21) toward the inner peripheral end surface of the door opening defined by the body panel (BP). 23), a first seal lip portion (24) protruding from the base portion (21) toward the inner peripheral edge of the door opening adjacent to the main seal portion (23), and the base portion ( 21) From the first seal lip portion (24)
And a second sealing lip portion (25) protruding toward the inner surface of the door panel (DP) adjacent to the second sealing lip portion (25). 2
The first auxiliary seal portion (26) is disposed at an undercut portion (25a) continuous with the outer bottom surface of 1), and is formed by molding so that the thickness of the rear end portion is gradually reduced. The rear end outer surface of the auxiliary seal portion (26)
The second auxiliary seal portion (27) is slightly overlapped by the tip of the second auxiliary seal portion (27).
The base (21) and the second seal lip (2)
5) is fixed to an outer peripheral end surface of the retainerless door panel (RLDP). 2. The first auxiliary sealing portion (26) is made of an ethylene propylene sponge rubber material, and is a high foaming sponge rubber material having a specific gravity of 0.1 to 0.3. The seal portion (27) is made of an ethylene propylene sponge rubber material and has a thickness of 3 to 10 m.
2. The weatherstrip according to claim 1, wherein the weatherstrip is a tape-shaped caulking sponge rubber material.