JPH085094B2 - Weather strip terminal connection method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a method of connecting both ends of a weather strip applied to an automobile by molding.

[0002]

As is well known, a weather strip for ensuring airtightness and watertightness is provided along the circumferential direction of a vehicle body opening between a vehicle body opening and a door or a trunk lid. Has been done.

[0003] type The weatherstrip has been integrally molded by a general extrusion molding, the connection site of the extrusion such as molding difficult straight portion and a corner portion of both end portions fit can butt in a mold Connection by molding is usually performed (see Japanese Patent Laid-Open No. 3-258520).

This conventional connecting method will be described with reference to FIG. 18. First, the weather strip 1 is a mounting base portion 2 which is mounted on the door opening edge of the vehicle body, the opening edge of the luggage compartment, etc., and the mounting base portion 2. A hollow seal portion 3 is provided which is provided at the end portion and has an outer periphery abutting against a door peripheral portion and a drunk lid peripheral portion which are not shown. Then, both end portions 4 and 5 of the straight portion and the corner portion are connected by molding using a mold, and both end portions 6a and 6b of the core member 6 are respectively connected to the hollow seal portions 3a and 3b of both end portions 4 and 5, respectively. In the inserted state, both the end portions 4 and 5 are set in a cavity of a mold, and a rubber material is injected into the cavity for connection.

[0005]

However, in the above-mentioned conventional connecting method, both end portions of the core member 6 are preliminarily set in the hollow seal portions 3a and 3b in order to maintain the shape at the time of molding. 6a and 6b must be inserted, respectively, and the core member 6 must be taken out of the hollow seal portion 3 after the completion of molding.
The desorption work is extremely complicated. Further, in order to take out the core member 6 from the inside of the hollow seal portion 31, not only a part of the outer side portion of the hollow seal portion 3 must be cut out to form a core removing hole, When pulling out the core member 6 from the use hole, there is a fear that the edge of the hole is torn. As a result, the molding work efficiency is lowered and the cost of the molding work is inevitably increased.

Further, since the mold itself has to have a complicated cavity structure taking the core member 6 into consideration, its manufacturing workability is also poor.

Moreover, the car wash water and rainwater that have entered the hollow seal portion 3 through the core vent hole are directly ejected from the air vent hole provided inside the hollow seal portion 3 and scattered into the vehicle or trunk room. I have a fear of doing it.

[0008]

The present invention SUMMARY OF THE INVENTION has been made in in view of the above conventional problems, the vehicle body of the opening edge or de
(A) A mounting base that is mounted on the peripheral edge of the (a) and a seal lip that is provided on the mounting base and has a tip that abuts the panel.
And a support lip whose center part is bent outward.
The both ends of the weather strip consisting of the hollow seal part thus configured are abutted in the mold,
A method of crushing each of the supporting lips with a mold to connect them, wherein the crushing direction of each of the supporting lips by the mold is
Front of the mounting base from the curved center of the support lip
Set in a slanted shape toward the tip of the seal lip.
At the same time, the two end portions are connected to each other via a connecting portion formed of a rubber material injected into a mold, and a sealing portion of the connecting portion has a cross-section of substantially the same shape as a sealing lip of the hollow sealing portion. It is characterized by being formed in.

[0009]

According to the present invention having the above construction, the opposing hollow seal portions of both end portions are simply crushed and connected through the connecting portion by the mold formation, and at the same time, the sealing portion of the connecting portion is sealed with the hollow sealing portion. Because it is formed in almost the same shape as the lip,
The hollow seal part and the sealing part ensure a sufficient sealing function, and since the conventional core member is completely unnecessary, the molding work efficiency and die manufacturing work efficiency are improved and the cost is low. Can be realized.

[0010]

【Example】

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a weather strip 11 provided for the connection method of the present invention.
A U-shaped welt portion 12 which is a mounting base portion for sealing between a luggage compartment and a luggage compartment lid of a vehicle (not shown) and which is attached to a flange portion provided at an opening edge of the luggage compartment, and an upper end portion of the welting portion 12. The hollow seal part 13 provided integrally is provided. The welt portion 12 is mainly made of solid rubber and has a cored bar 14 embedded therein. On the other hand, the hollow seal portion 13 is made of sponge rubber, and is composed of a seal lip 15 and a support lip 16 which are connected in a substantially rhombic shape, and a hollow portion 17 inside the both lips 15 and 16, one of which is a substantially square character. When the trunk lid is closed, the outer peripheral surface 15a of the end portion of the shaped seal lip 15 comes into contact with the inner peripheral edge of the trunk lid and is bent and deformed to exert a sealing function.

Both end portions 18 and 19 of the direct portion and the corner portion of the weather strip 11 are connected by die molding using a die (not shown). Explaining this connection method in detail, the cavity of the mold has a hollow seal portion, whereas the portion corresponding to the welt portion 12 is formed in the shape of the welt portion 12, that is, a substantially U-shape. A portion corresponding to 13 is formed in a rectangular thin plate shape, and one inner peripheral surface is formed to be substantially the same as the outer shape of the seal lip 15. Then, the molding procedure is as follows. First, both end portions 1 in which the core metal 14 is not embedded in the welt portion 12
The 8 and 19, combined can the collision in the cavity of the mold, the hollow seal portion 13 of the both terminals 18, 19, 13 supporting Li of
The opposite edges 13a, 13 b of-up 16, 16 crushed by the mold. After that, a rubber material is injected into the cavity from a predetermined injection port to mold the connecting portion 20 by molding.

Here, a supporting lid for the hollow seal portion 13 is provided.
And the direction in which the opposite edges 13a and 13b of the press 16 are crushed by the mold.
As shown in FIG. 13, the support lip 16 is simply omitted.
Seal lip 15 along the direction of the arrow near the center a of the bend
When pushed to the side, the upper end side of the support lip 16 is a wafer.
The seal lip 15 is pulled by pulling toward the belt 12
Pull it down as shown by the chain line in Figure 14.
U. Therefore, the seal lip of such a crushed portion is
Sealing due to reduced pressure contact with 15 trunk lid
Performance decreases.

Therefore, in this embodiment, the support lip 16
Lower end side below the welt portion 12 with respect to the center portion a of
The part b is set in the substantially tip direction of the seal lip 15, that is, in the arrow direction.
It is crushed along the line. By this, support
Generation of tensile force toward the welt 12 at the upper end of the lip 16
Shrinkage is of prevention but is prevented downward of the sealing lip 15
Be done.

Therefore, the weather strip 11 is
As shown in FIGS. 2 and 3, both lips 15 and 16 of the opposing edges 13a, 13 b pushes collapsed hollow seal member 13 is in the form of close contact with each other. Further, the connecting portion 20 is
The base portion 21 corresponding to the welt portion 12 is formed in a substantially U-shaped cross section and is substantially continuous with the welt portion 12, while the sealing portion 22 corresponding to the hollow seal portion 13 is formed in a single flat plate shape. ing. And this seal part 2
2 has a cross-sectional shape that is substantially the same as that of the seal lip 15, is formed in a substantially V shape, and is continuous with the seal lip 15.

Therefore, as described above, both terminal units 1
While crushing the hollow seal parts 13 and 13 of 8 and 19 ,
Since the connection is made by the connection portion 20 formed by molding, the connection can be surely and continuously performed.
Since the conventional core member is not necessary at all, complicated work such as the work of attaching and detaching the core member and the setting work in the mold can be avoided, and the structure of the cavity can be simplified.
As a result, the molding work and the manufacturing work efficiency can be greatly improved and the cost can be reduced.

Moreover, by fitting the base portion 21 of the connecting portion 20 which is substantially continuous with the welt portion 12 to the flange portion at the opening edge of the trunk room, the entire weather strip 11 can be securely fixed to the vehicle body.

Further, since the sealing portion 22 of the connecting portion 20 is formed continuously in the same cross-sectional shape as the sealing lip 15, the sealing portion 22 is the same as the sealing lip 15 and is the same seal. Since it abuts the trunk lid in an area, a reliable sealing action is obtained.

FIG. 4 shows a second embodiment of the present invention in which a weather strip 11 is applied between a door opening of a vehicle body and front and rear doors. That is, the door weather strip 11 includes a mounting base 12 that is mounted on the peripheral edge of the door by a clip or the like, and a hollow seal portion 13 that is erected on the vehicle body side of the mounting base 12. Further, both end portions 18 and 19 of the weather strip 11 are connected by die molding using the same die as in the first embodiment. That is, as shown in FIGS. 5 and 6, the opposite edges 13a and 13b of the hollow seal portion 13 are formed by a mold in the first embodiment.
The connection part 20 is formed by being crushed from the same direction as the above, and the connection part 20 has a base part 21 corresponding to the mounting base part 12 that is molded substantially the same as the mounting base part 12, and a seal. The part 22 is formed in a flat plate shape. The seal portion 22 is formed in a shape substantially the same as the seal lip 15 of the hollow seal portion 13 and is continuous. Therefore, this second embodiment also has the same effects as the first embodiment.

FIG. 7 shows a third embodiment, which is applied to a so-called cowl top seal arranged between the upper surface of the radiator grill having the weather strip 11 at the front end of the vehicle and the front end of the engine hood. . That is, the weather strip 11 is composed of a flat plate-shaped mounting base 12 fixed to the upper surface of the radiator grill with an adhesive or the like, and a hollow seal portion 13 provided upright on the upper end of the mounting base 12. The portion 13 is composed of a seal lip 15 that rises from one outer side edge of the mounting base 12 and a support lip 16 made of sponge rubber that is connected to each side of the mounting base 12 and the seal lip 15 on the vehicle inner side.

[0021] Then, both end portions 18 and 19, wherein a is connected by a connecting method as well, the opposite edges 13a, 13 b of the hollow seal portion 13 or the first embodiment and the same direction in the mold
While being crushed, the support lip 16 comes into close contact with the inner surface of the seal lip 15 as shown in FIG. 8, while the connecting portion 20 is integrally formed with portions corresponding to both lips 15 and 16 as shown in FIG. The seal portion 22 is the seal lip 15
Is formed to have substantially the same cross-sectional shape and is continuous. Therefore, it is of course possible to obtain the same effects as those of the first and second embodiments, as well as the sealing portion 2 of the connecting portion 20.
Since the bulging portion 23 is integrally formed on the inner peripheral surface of 2, the reduction of the reaction force of the seal member 22 can be prevented.

FIG. 10 shows a fourth embodiment, and the weather strip 11 is applied to the one attached to the front end portion of the engine hood, contrary to the third embodiment. Also in this case, in both terminal portions 18 and 19, as shown in FIG. 11, the opposing edges 13a and 13b of the hollow seal portion 13 are crushed, and the support lip 16 comes into close contact with the seal lip 15 side, while the connecting portion 2
As shown in FIG. 12, 0 is formed in the same cross-sectional shape as the shape of the seal lip 15 of the hollow seal portion 13 to ensure continuity.

In FIG. 15, for example, one rib 24 is formed in the center of the inner surface of the seal portion 22 of the connecting portion 20 in the first embodiment along the direction orthogonal to the longitudinal direction of the weather strip 11. That is, the rib 24 is
The seal portion 22 is vertically extended in the direction of the welt portion 12 except the upper end portion thereof. Therefore,
Since the bending point X of the seal portion 22 when the trunk lid 25 is closed is located above the seal portion 22 by the rib 24, as shown in FIG.
5. The sealing area with the lower surface is increased, and the reaction force is increased, so that the sealing performance is improved.

Further, it is possible to provide two ribs 24 as shown in FIG. 17 or to replace the ribs with a thick portion having a triangular shape or a round shape. The reaction force of the portion 22 is further improved, and the sealing performance is further improved.

[0025]

As is apparent from the above description, according to the method of connecting the end portions of the weather strip according to the present invention, both end portions are formed by molding while crushing the supporting lip of the hollow seal portion. Since the connection is made via the connecting portion, the conventional core member is completely unnecessary, and the complicated molding work by the core member is avoided. Therefore,
The molding work of such connection and the manufacturing work efficiency of the mold are greatly improved, and the cost can be reduced.

Further , as described above, the hollow seal portion is supported.
Mount the crushing direction of the lip from the center of the bending of each support lip
Tilt from the position on the base side to the approximate tip of the seal lip.
Since it is set to be slanted, the mounting base for the upper end of the support lip
Is prevented from being generated in the direction of
It is possible to prevent the person from closing.

Further, since it is not necessary to form the extraction hole for the core member, it is possible to prevent water from entering the trunk room or the like.

Moreover, since the sealing portion of the connecting portion is formed in substantially the same shape as the sealing surface of the hollow sealing portion, the sealing function of the sealing portion is sufficiently ensured, and the deterioration of the sealing performance is prevented.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of a weather strip used in a first embodiment of the present invention.

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

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is a perspective view of a main part of a weather strip used in a second embodiment of the present invention.

5 is a sectional view taken along line CC of FIG.

FIG. 6 is a sectional view taken along line DD of FIG. 4;

FIG. 7 is a perspective view of a main part of a weather strip used in a third embodiment of the present invention.

8 is a cross-sectional view taken along the line EE of FIG.

9 is a cross-sectional view taken along the line FF of FIG.

FIG. 10 is a perspective view of a main part of a weather strip used in a fourth embodiment of the present invention.

11 is a sectional view taken along line GG of FIG.

12 is a sectional view taken along line HH of FIG.

FIG. 13 is a sectional view showing a terminal portion of the weather strip of the first embodiment.

FIG. 14 is a cross-sectional view showing a state where the end portion of the weather strip is crushed.

FIG. 15 is a side view showing a state where one rib is provided on the weather strip.

16 is a cross-sectional view taken along the line I-I of FIG.

FIG. 17 is a side view showing a state where two ribs are provided on the weather strip.

FIG. 18 is a perspective view showing a process of connecting weather strips according to a conventional method.

[Explanation of symbols]

11 ... Weather strip 12 ... Welt part, mounting base 13 ... Hollow seal part 13a, 13b ... Opposite edge 15 ... Seal lip 16 ... Support lip 18, 19 ... Both end parts 20 ... Connection part 22 ... Seal part a ... Bent center Part b ... Lower end part

Claims (1)

[Claims] Claims: 1. At the opening edge of the vehicle body or the peripheral edge of the door.
Ri and mounting base to be attached, so as to project to the base with said mounting, previously
The seal lip whose end is in contact with the panel and the central part are outside
And a support lip bent in a curved direction
The two ends of the weather strip, which consist of the hollow seal part , are butted against each other in the mold, and
And crushed up in a mold, a method of connecting, the crushing direction of the mold of the respective supporting lips, respective supporting Li
From the position closer to the mounting base than the curved center of the cup.
If you set it so that it approaches the tip of the lip,
The two end portions are connected to each other through a connecting portion formed of a rubber material injected into a mold, and a sealing portion of the connecting portion has a cross-section of substantially the same shape as a seal lip of the hollow sealing portion. A method for connecting a terminal portion of a weather strip, which is characterized in that: