JPH06210663A - Method for connecting ends of weather strip - Google Patents

Abstract

PURPOSE:To ensure improvement of efficiency in molding and manufacturing works of a connecting part of two ends and prevent degradation of sealing performance of the connecting part. CONSTITUTION:Two ends 18 and 19 of a weather strip 11 consisting of a welt 12 and hollow sealed parts 13 will be connected by die forming. Facing edges 13a and 13b of the hollow sealed parts 13 of the ends 18 and 19 are crushed by a mold. Between the two ends 18 and 19, a rubber material is injected so as to mold a connecting part 20 and connect the ends. A sealing position 22 of the connecting part 20 is shaped into the same form as a seal lip 15.

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.

This weather strip is generally integrally formed by extrusion molding, but at the connecting portion such as a straight line portion or a corner portion, which is difficult to perform extrusion molding, both end portions are butted in a die to be molded. The connection is usually performed by the method described in 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]

DISCLOSURE OF THE INVENTION The present invention has been devised in view of the above problems of the prior art, and is a hollow having a mounting base and a seal lip projecting from the mounting base and abutting the panel on the outer periphery. A method of connecting both end portions of a weather strip consisting of a seal portion, wherein the opposite edges of the hollow seal portions of the opposite end portions are crushed in a mold, and the both end portions are inside the mold. It is characterized in that it is connected through a connecting portion formed of a rubber material injected into the container, and the sealing portion of the connecting portion is formed in substantially the same shape as the seal lip of the hollow sealing portion.

[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]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 shows a weather strip 11 used in the connection method of the present invention.
Is a U-shaped welt portion 12 which is a mounting base portion and which is attached to a flange portion provided at an opening edge of the luggage compartment, and an upper end of the welt portion 12 for sealing between a luggage compartment and a luggage compartment lid of a vehicle not shown. And a hollow seal portion 13 that is integrally provided in the section. 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 part 1
3 is made of sponge rubber, and has a seal lip 15 and a support lip 16 that are connected in a substantially rhombic shape, and both the lips 15, 1.
6 and a hollow portion 17 inside, and the outer peripheral surface 15a on the front end side of one of the substantially V-shaped seal lips 15 is bent and deformed while being in contact with the inner peripheral edge of the trunk lid when the trunk lid is closed. Is designed to demonstrate.

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.
8 and 19 are butted in the cavity of the mold, and the opposite edges 13 of the hollow seal portions 13 of the both end portions 18 and 19 are joined together.
Crush a and 13a with a die. After that, a rubber material is injected into the cavity from a predetermined injection port to mold the connecting portion 20 by molding.

Therefore, the weather strip 11 is
As shown in FIG. 2 and FIG. 3, both lips 15 and 16 of the hollow seal portion 13 whose opposite edges 13a and 13a are crushed are in 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 5 and 16,
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 opposing edges 13a and 13b of the hollow seal portion 13 are crushed by the mold to form the connecting portion 20, and the connecting portion 20 is formed between them.
The base portion 21 corresponding to the mounting base portion 12 is molded substantially the same as the mounting base portion 12, and the sealing portion 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 of the present invention, which is applied to a so-called cowl top seal arranged between the upper surface of a radiator grill having a weather strip 11 at the front end of a vehicle and the front end of an 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.

Then, the both end portions 18 and 19 are connected by the connecting method in the same manner as described above, and the opposing edges 13a and 13a of the hollow seal portion 13 are crushed by the metal mold, and the supporting lip as shown in FIG. 16 is in close contact with the inner surface of the seal lip 15, while at the connection portion 20, as shown in FIG.
The parts corresponding to 5 and 16 are integrally formed, and the seal part 22 is formed in the same cross-sectional shape as the seal lip 15 and is continuous. Therefore, the first and second
Of course, it is possible to obtain the same effect as the embodiment.
Since the bulging portion 23 is integrally formed on the inner peripheral surface of the sealing portion 22 of the connecting portion 20, it is possible to prevent the reaction force of the sealing member 22 from being lowered.

FIG. 10 shows a fourth embodiment, in which 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.

FIG. 13 shows, for example, the facing edge 13 of the hollow seal portion 13 of the weather strip 11 shown in the first embodiment.
Support lip 1 when crushing a and 13b with a mold
The crushing position of 6 is defined. That is, when the vicinity of the substantially bent center portion a of the support lip 16 is pressed toward the seal lip 15 side in the direction of the arrow, the upper end side of the support lip 16 is pulled toward the welt portion 12, and the seal lip 15 is As shown by the dashed-dotted line 14 in FIG. Therefore, the pressure contact force of the seal lip 15 at the crushed portion with respect to the trunk lid is reduced, and the sealing performance is reduced.

Therefore, in this embodiment, the lower end side portion b of the support lip 16 below the bent center portion a is crushed along the arrow direction. This prevents a tensile force from being generated at the upper end of the support lip 16 toward the welt portion 12 and prevents the seal lip 15 from being pulled downward.

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 for connecting the end portions of the weather strip according to the present invention, both end portions are formed by molding while crushing the opposing edges 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, 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.

6 is a cross-sectional view taken along line DD of FIG.

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 18, 19 ... Both end parts 20 ... Connection part 22 ... Seal part

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location B29L 31:30 4F

Claims (1)

[Claims] 1. A method of connecting both end portions of a weather strip, which comprises a mounting base portion and a hollow seal portion projecting from the mounting base portion and having a seal lip on its outer periphery that abuts against the panel, said opposing ends being opposed to each other. The hollow seal portions of both end portions are crushed in the mold, and the both end portions are connected via a connecting portion formed of a rubber material injected into the mold, and the sealing portion of the connecting portion is A method for connecting a terminal portion of a weather strip, which is formed in substantially the same shape as the seal lip of the hollow seal portion.