JPH10151999A - Weather strip - Google Patents

Abstract

(57) [Problem] To provide an inexpensive weatherstrip having a relatively compact configuration, excellent dive prevention performance, and low cost. SOLUTION: In the weather strip 20 of the present invention, a hollow seal portion 21 is integrally formed on a head of a U-shaped grip portion 22, and from the inner surfaces of both side walls of the U-shaped frame portion of the U-shaped grip portion 22. A plurality of lips 24 are opposed to the center, and the U-shaped core member 23 is insert-molded to increase rigidity, and a body-inner panel BIP and a body-outer Each body panel BI is formed so as to be able to hold each flange of the panel BOP, from the bottom inner surface of the U-shaped frame.
A seal pad portion 25 is projected from each of the flange ends F ₁ and F ₂ of P and BOP, and a seal reinforcing portion 28 is formed on at least one side wall surface of the seal pad portion 25. Each flange end F ₁ ,
Achieve double sealing of for F _2.

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 a door of a passenger car or the like, and more particularly to a weatherstrip structure for a back door and a trunk lid.

[0002]

2. Description of the Related Art Trunk lids used in hatchback cars or station wagons or in general passenger cars have substantially the same dustproof and waterproof functions, and have substantially the same structure. The following description is directed to a back door BD of an upper hinge lower opening type (direction of arrow F) or a lateral hinge side opening type (direction of arrow S).

A conventional weatherstrip mounted around the back door BD has a body / inner panel BIP forming the periphery of the back door BD as shown in FIG. 5 cut along the line AA in FIG. And body / outer panel BOP
Is often required to be able to press a part of the inner surface of the door / inner panel DIP. FIG.
Is the open state of the back door BD and the door
This shows the weather strip 10 in a state where it is not pressed against the inner surface of the inner panel DIP. DOP is a door
It is part of the outer panel.

The main part of the weather strip 10 is usually
Consisting of a hollow seal portion 11 and a U-shaped grip portion 12 called a pantograph-type weather strip from its entire shape, the U-shaped grip portion 12 is located at the center from the inner surfaces of both side walls of the U-shaped frame portion. A plurality of lips 14 are opposed to each other, and the U-shaped metal core member 13 is insert-molded to increase rigidity, and the body inner panel BIP and the body Each of the body panels is formed by extruding a seal pad portion 15 formed of a low modulus sponge on the bottom inner surface of the U-shaped frame portion so as to be able to clamp each flange portion of the outer panel BOP.
Protrude toward the flange ends F _{1 and} F ₂ of BIP and BOP,
The a sealing pad portion 15 is elastically pressed to the each flange end F _1, F _2, the sealing performance between the bottom inner surfaces of the flange end F _1, F ₂ and the U-shaped building frame portion We were trying to strengthen it.

Further, a lip portion 17 for interior trim having a tip portion slightly curved downward from the vehicle interior outer surface of the U-shaped frame portion is protruded, and is pressed against the peripheral surface of the interior trim IT to hermetically seal it. Sex had been enhanced. On the other hand, the hollow seal portion 11 is formed integrally with the head of the U-shaped grip portion 12 so as to be able to press against the inner surface of the door / inner panel DIP. The U-shaped grip portion 12 is provided with another seal lip portion 16 for pressing the outer surface of the U-shaped frame portion on the outer side of the vehicle to the peripheral surface of the body outer panel BOP to enhance the sealing performance. It consisted of protruding parts.

[0006]

However, the conventional weatherstrip 10 for a back door BD is mounted at a predetermined fixed position at the time of assembling, and when the back door BD is closed. When the hollow seal portion 11 is pressed against the inner surface of the door / inner panel DIP,
The seal pad portion 15 elastically pressed against the flange ends F _{1 and} F _{2 is} moved from the state before the elastic pressure contact indicated by the broken line in FIG.
As shown in a relatively gentle exhibits a concavely curved elastic deformation, in other words, sufficient adhesion concave surface by the elastic deformation with respect to the respective flange end F _1, F ₂ and its vicinity of the surface However, since it is curved in the spread state, a part of the rainwater R that has entered from the outside of the vehicle becomes so-called diving water, and the variation in the mounting accuracy and the forming accuracy of the weather strip 10,
Alternatively each body panel BIP, after passing through the respective flange end F _1, F ₂ travel through the gaps caused by the easy step occurs in the panel alignment unit of BOP, etc., wherein the overlapping portions of the flange portions It was not possible to completely suppress the occurrence of the trouble of infiltrating into a small gap and leaking into the vehicle.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art and to provide an inexpensive weatherstrip having a relatively compact structure, excellent dive prevention performance, and low cost.

[0008]

SUMMARY OF THE INVENTION The object of the present invention is as follows.
A weather strip formed by integrally molding a hollow seal portion and a U-shaped grip portion, wherein a head of the U-shaped grip portion is formed so that the hollow seal portion can be pressed against an inner surface of the door / inner panel. The U-shaped grip portion is provided with a plurality of lip portions facing each other from the inner surfaces of both side walls of the U-shaped frame portion toward the center, and the U-shaped core metal member is insert-molded. The flanges of the body inner panel and the body outer panel are formed so as to be able to increase rigidity so that the flanges of the body inner panel and the body outer panel can be sandwiched between the tip portions of the lip portions.
A seal pad portion is protruded from the bottom inner surface of the V-shaped body portion toward each flange end of each of the body panels, and a seal reinforcing portion is formed on at least one side wall surface of the seal pad portion. Achieved by the featured weatherstrip.

Further, the object of the present invention is that the seal pad portion is formed by integrally molding a sponge rubber material having a specific gravity of 0.2 to 0.4 with the same material as that of the U-shaped frame portion of the U-shaped grip portion. This is achieved by a weather strip.

Further, the object of the present invention is attained by a weather strip wherein the seal reinforcing portion is formed by extruding and integrally molding the same material as the U-shaped frame portion of the U-shaped grip portion. You.

Still another object of the present invention is that the seal pad portion and the seal reinforcing portion are simultaneously formed integrally with the U-shaped body portion of the U-shaped grip portion by extrusion. Achieved by weatherstrip.

The weather strip of the present invention is formed by integrally molding a hollow seal portion and a U-shaped grip portion, and the U-shaped portion is formed so that the hollow seal portion can be pressed against the inner surface of the door / inner panel. U-shaped grip portion is formed integrally with the head of the U-shaped grip portion, and the U-shaped grip portion has a plurality of lip portions opposed from the inner surfaces of both side walls of the U-shaped frame portion toward the center.
The U-shaped frame is formed by insert-molding a U-shaped core member so as to increase rigidity so that the flanges of the body inner panel and the body outer panel can be sandwiched between the tip portions of the lip portions. The seal pad is formed by projecting a seal pad portion from the bottom inner surface of the portion toward each flange end of the body panel, and forming a seal reinforcing portion on at least one side wall surface of the seal pad portion. When the portion is elastically pressed against each flange end of each of the body panels, the seal reinforcing portion is bent toward the opposite flange portion side of at least one side wall surface of the seal pad portion due to its bending rigidity. While preventing the deformation, the seal pad portion further promotes a concave curved surface elastic deformation with respect to each of the flange ends to enhance the sealing performance of the seal pad portion. Furthermore, the tip portion of the sealing reinforcement unit itself, close to or closely curved reduction toward the flange side by elastic deformation toward the flange portion side of the seal pad portion.

Further, in the weather strip of the present invention, the seal pad portion is formed by extruding a sponge rubber material having a specific gravity of 0.2 to 0.4 from the same material as the U-shaped frame portion of the U-shaped grip portion. Therefore, even when a small external pressure is applied, it is flexibly elastically deformed and comes into close contact with the vicinity of each of the flange ends.

Further, in the weather strip of the present invention, since the seal reinforcing portion is formed by extruding and integrally forming the same material as the U-shaped frame portion of the U-shaped grip portion, the bending rigidity thereof is appropriately increased. In addition to restricting the slow elastic deformation of the seal pad portion, the tip of the seal reinforcing portion itself is curved by the elastic deformation of the seal pad portion to directly enhance the sealing performance with respect to the side surfaces of the flange portions. To contribute.

Further, in the weather strip according to the present invention, the seal pad portion and the seal reinforcing portion are simultaneously formed integrally with the U-shaped body portion of the U-shaped grip portion by extrusion. The operation of assembling and fixing the part and the seal reinforcing part is simplified.

[0016]

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. The weather strip of the present invention is directed to the back door BD shown in FIG. 4, and a so-called pantograph type weather strip will be described. FIG. 1 shows the weather strip of the present invention when the back door is opened, which is cut along the line AA in FIG. 4, similarly to FIG.
FIG. 20 is a sectional view of a principal part of No. 20. The essential part of the weather strip 20 of the present invention comprises a hollow seal portion 21 and a U-shaped grip portion 22. The hollow seal part 21 is formed integrally with the head of the U-shaped grip part 22 so as to be able to press against the inner surface of the door inner panel DIP. On the other hand, the U-shaped grip portion 22 has a plurality of lip portions 24 opposed from the inner surfaces of both side walls of the U-shaped frame portion toward the center, and a U-shaped core member.
23 to increase the rigidity by insert molding
Each of the body inner panel BIP and the body outer panel BOP is formed so as to be able to be sandwiched between the 24 tip portions, and each of the body panel BIPs and the BOP flanges is formed from the bottom inner surface of the U-shaped frame. A seal pad 25 protrudes toward the end portions F ₁ and F ₂ , and a seal reinforcing portion 28 is formed on one side wall surface of the seal pad portion 25.

Since the seal pad portion 25 and the seal reinforcing portion 28 are simultaneously formed integrally with the U-shaped frame portion of the U-shaped grip portion 22 by extrusion extrusion, the seal pad portion 25 and the seal The operation of assembling and fixing the seal reinforcing portion 28 is simplified. In particular, the seal pad portion 25 is elastically deformed flexibly even by a small external pressure, and has a specific gravity of 0 to be in close contact with the flange ends F ₁ and F ₂ and the vicinity thereof.
It is made of a sponge rubber material of 2 to 0.4 and has desired flexibility and extrudability. Also, the seal reinforcing portion 28
Is made of the same material as the U-shaped skeleton of the U-shaped grip portion 22 to appropriately increase its bending stiffness, and falls along one side wall surface of the seal pad portion 25, and its tip portion is It is formed so as to protrude slightly below the lower surface of the seal pad portion 25, and is integrated with one of the side wall surfaces of the seal pad portion 25 to provide desired bending rigidity and extrudability. In addition, a lip portion 27 for interior trim having a tip slightly curved downward from the vehicle interior outer surface of the U-shaped frame portion is protruded, and is pressed against the peripheral surface of the interior trim IT to enhance the sealing performance. On the other hand, the body outer panel BO
Another seal lip portion 26 is provided so as to protrude from the peripheral surface of P so as to be pressed against the peripheral surface to enhance the sealing performance.

The weather strip 20 of the present invention is mounted at a predetermined fixed position at the time of assembling, and when the back door BD is in the closed state and the door inner panel DI
When the the P interior surface of the hollow seal portion 21 is pressed against the sealing pad portion 25 which is elastically pressed to the each flange end F _1, F ₂ is an elastic pressure before the state shown by broken lines, FIG. 2 as shown in, each body panel BIP, elastically pressed to the each flange end F _1, F ₂ of the BOP. The seal reinforcing section 28
However, the bending rigidity prevents deformation of the sealing pad portion 25 in the expanded state curved toward the opposite flange portion side of one of the side wall surfaces, while the flange end portions F ₁ , to further promote concavely curved elastic deformation with respect to F ₂ enhanced the sealability by the sealing pad 25, further, the tip portion of the sealing reinforcement unit 28 itself, the flange portion of the seal pad 25 Due to the elastic deformation, it is bent toward the side surface of the flange portion to be close to or close to the flange portion.

As a result, one of the rainwater R invading from the outside of the vehicle
Part becomes so-called diving water, and temporarily
20 assembly accuracy and molding accuracy variation, or
Steps that are likely to occur at the panel fitting part of the body panel BIP, BOP
Through each gap generated due to the above-mentioned each flange end
Part F_1,F_TwoOf each flange end F _1,
F_TwoAnd the seal reinforcing portion 28 closely contacted with the side surface in the vicinity thereof.
The front end portion and the seal pad portion 25 serve as each of the above-mentioned flags.
Actually, it can penetrate into the slight gap at the overlapping part of the flange.
Effectively blocked.

FIG. 3 is a sectional view showing a modified example of the weather strip 20 of the present invention. The weather strip 20 is extruded integrally on both side walls of the seal pad 25 instead of the seal reinforcement 28 in FIG. A pair of seal reinforcing portions 28a and 28b are provided so as to protrude. The pair of seal reinforcing portions 28a and 28b impart substantially uniform sealing properties to the flange end portions F ₁ and F ₂ and both side surfaces in the vicinity thereof.

Further, as shown in FIG. 1, the seal reinforcing portion 28 may be extended longer on the body / outer panel side BOP than the seal pad portion 25. Further, the seal pad portion is provided on the indoor side of the seal reinforcing portion 28 which has been further extended.
It is also possible to extend the length of 25, and the dive prevention performance can be further improved.

The weather strip of the present invention described above.
No. 20 has the following new effects.
That is, the weather strip 20 of the present invention is formed by integrally molding the hollow seal portion 21 and the U-shaped grip portion 22, and the hollow seal portion 21 can be pressed against the inner surface of the door / inner panel DIP. The U-shaped grip portion 22 is formed integrally with the head of the U-shaped grip portion 22 so that the U-shaped grip portion 22 faces the plurality of lip portions 24 from the inner surfaces of both side walls of the U-shaped frame portion toward the center. The U-shaped core member 23 is insert-molded to increase rigidity, and the flanges of the body inner panel BIP and the body outer panel BOP are sandwiched between the tip portions of the lip portions 24. Formed possible
And a sealing pad portion 25 protruding from the bottom inner surface of the U-shaped body portion toward each of the flange ends F ₁ and F ₂ of each of the body panels BIP and BOP, and at least one of the sealing pad portions 25 is provided. The seal pad portion 25 is formed by molding the seal reinforcing portion 28 on the side wall surface of the body panel BIP, BO.
When the flange portions F ₁ and F ₂ of P are elastically pressed against the flange end portions F ₁ and F ₂ , the seal reinforcing portion 28 is bent toward the opposite flange portion side of at least one side wall surface of the seal pad portion 25 due to its bending rigidity. While preventing deformation in the spread state,
It becomes possible to further promote the elastic deformation of the concave shape of the seal pad portion 25 with respect to the flange ends F ₁ and F ₂ , thereby enhancing the sealing performance of the seal pad portion 25, and further improving the seal reinforcement. The distal end of the portion 28 itself is bent toward the side surface of the flange portion by elastic deformation toward the flange portion side of the seal pad portion 25, so that the sealing portion 25 is close to or closely contacted to achieve double sealing.

Further, in the weather strip 20 of the present invention, the seal pad portion 25 is formed by extruding a sponge rubber material having a specific gravity of 0.2 to 0.4 from the same material as the U-shaped frame portion of the U-shaped grip portion 22 by extrusion. Therefore, even when a small external pressure is applied, the flange ends F ₁ and F ₂ and the side surfaces in the vicinity thereof can be securely and closely contacted with each other by being elastically deformed flexibly.

Further, in the weather strip 20 of the present invention, since the seal reinforcing portion 28 is formed by extrusion and integral molding with the same material as the U-shaped frame portion of the U-shaped grip portion 22, the bending rigidity thereof is appropriately adjusted. To restrict the slow elastic deformation of the seal pad portion 25,
The distal end of the seal pad 28 itself is also curved by the elastic deformation of the seal pad section 25, which can directly contribute to the enhancement of the sealing performance with respect to the side surfaces of the flange sections.

Further, in the weather strip 20 of the present invention, the seal pad portion 25 and the seal reinforcing portion 28
The U-shaped body portion of the U-shaped grip portion 22 is simultaneously extruded and integrally formed, so that the assembling and fixing operations of the seal pad portion 25 and the seal reinforcing portion 28 are simplified, and dive water is prevented by a compact structure. It has become possible to provide an inexpensive weather strip with excellent performance.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a principal part of a weather strip according to the present invention when a back door is released, taken along line AA in FIG. 4;

FIG. 2 is a cross-sectional view of a principal part of the weather strip of the present invention when the back door is closed, taken along the line AA in FIG. 4;

FIG. 3 is a cross-sectional view of a principal part of a modified example of the weatherstrip of the present invention when the back door is closed, taken along the line AA in FIG. 4;

FIG. 4 is a perspective view around a back door of a passenger car.

FIG. 5 is a cross-sectional view of a principal part of the conventional weather strip when the back door is released, taken along the line AA in FIG. 4;

FIG. 6 is a cross-sectional view of a principal part of the conventional weatherstrip when the back door is closed, taken along the line AA in FIG. 4;

[Explanation of symbols]

10 Conventional weather strip 20 Weather strip of the present invention 11,21 Hollow seal part 12,22 U-shaped grip part 13,23 U-shaped core metal member 14,24 Lip part 15,25 Seal pad part 16,26 Seal Lip part 17,27 Trim lip part 28 Seal reinforcement part 28a, 28b Seal reinforcement part DOP door / outer panel DIP door / inner panel BOP body / outer panel BIP body / inner panel IT Interior trim R Rainwater F ₁ Body panel / Flange end F ₂ Body panel flange end

Claims (4)

[Claims] 1. A weather strip (20) formed by integrally molding a hollow seal portion (21) and a U-shaped grip portion (22), wherein the hollow seal portion (21) is formed of the door inner. The U-shaped grip portion (22) is integrally formed on the head of the U-shaped grip portion (22) so that the U-shaped grip portion (22) can be pressed against the inner surface of the panel (DIP). A plurality of lips (24) are opposed to each other from the center to the center, and the U-shaped core metal member (23) is insert-molded to increase rigidity, and a body is formed between the tips of the lips (24).・
Inner panel (BIP) and body / outer panel (BO
P) Each of the body panels (BIP, BOP) is formed so as to be able to clamp each of the flange portions, and from the bottom inner surface of the U-shaped frame portion.
Sealing pad portion (25) projecting toward each flange end (F _1, F ₂₎ of molded on at least one side wall surface seal reinforcing portion (28) of said seal pad section (25) A weatherstrip (20) characterized in that it consists of: 2. The method according to claim 1, wherein said seal pad portion (25) has a thickness of 0.2 to 0.1.
The weatherstrip (20) according to claim 1, wherein the weatherstrip (20) is made of a sponge rubber material having a specific gravity of 4 and is formed by extruding the same material as the U-shaped frame of the U-shaped grip (22). ). 3. The seal member according to claim 1, wherein the seal reinforcing portion is formed by extrusion molding with the same material as the U-shaped frame portion of the U-shaped grip portion. Weatherstrip (20). 4. The seal pad portion (25) and the seal reinforcing portion (28) are formed by simultaneously extruding and forming integrally with the U-shaped frame portion of the U-shaped grip portion (22). The weatherstrip (20) according to claim 1, wherein: