JPH11221859A - Connecting method for weather strip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance productivity and outward appearance of a product in the case of mutually connecting the end parts of weather strips, which have an extruded hollow seal part, by mold formation. SOLUTION: In the case of arranging both end parts 10a of extruded weather strips 10 in a molding die 22 in such a state that both end parts 10a are mutually faced, the mutually opposed both end parts 10a are set in such a state that both end parts 10a have been connected through rubber members 26 inserted into the hollow seal parts 14 of both hands. Both end parts 10a are connected by performing mold formation in this state. Thereby, the mutual end parts of the weather strips are connected without using a core.

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 attached to a vehicle body opening edge or a door edge and seals the opening at a vehicle body opening such as a trunk portion of a vehicle or a door for getting on and off. The present invention relates to a method of connecting the ends of a weather strip having a hollow seal portion formed by extrusion by molding.

[0002]

2. Description of the Related Art Some automotive weather strips include a mounting base attached to an opening edge of a vehicle body or an edge of a door, and a hollow seal bulging from the mounting base. Conventionally, in such a weather strip, the end portions are connected by molding after extrusion molding, and at that time, a hollow seal portion in the molded portion is formed by disposing a core.

For example, as shown in FIG. 6A, a hollow seal portion in a molded portion 102 is formed in a hollow seal portion 101 at an end portion of an extruded weather strip 100. The core 103 is attached, and in this state, the core 103 is set in the molding die 104, and the molding die 10
In FIG. 4, the rubber to be the molded part 102 is press-fitted and vulcanized, and after the vulcanization is completed, as shown in FIG. The core 103 is pulled out using the operation arm 103a.

[0004]

However, in the above-mentioned conventional method, since the core 103 is used, the core removing hole 105 having a man-hour for mounting and removing the core 103 is provided in the extruded weather strip 100. It is necessary to remove the core 103 when removing the core 103 after molding.
5 is broken, the core hole 105 remains in the product, and the appearance is poor.

Accordingly, an object of the present invention is to provide a method of connecting a weather strip having a hollow seal portion, which can improve productivity and appearance.

[0006]

The method of connecting a weather strip according to the present invention is a method of connecting ends of a weather strip having an extruded hollow seal portion by molding. The end portions of the weather strip are made to face each other, and the end portions are connected to each other via a rubber member inserted into each hollow seal portion, and the molding is performed in this state. I do.

In this case, the ends of the weather strip are connected to each other with the rubber member mounted in the hollow seal portion near the connection portion. Thus, instead of using a core, a rubber member is used, and the rubber member is inserted into the hollow seal portion at the end of the weather strip opposed to each other and molded to eliminate the core hole. The operation of removing the core is not required, and the occurrence of defective products due to tearing of the weather strip at the time of the removal can be prevented. Furthermore, the core hole is eliminated from the product, so that the appearance is good. This rubber member can also function as a cushioning material when the door is closed.

The rubber member may be hollow or solid. If the rubber member is hollow, the hollow seal portion in the section where the rubber member is disposed may be hollow. If it can be made solid, the hollow seal portion becomes solid. Therefore, according to the rigidity required as a hollow seal portion in such a connection portion,
A hollow or solid shape may be selected.

[0009] When the rubber member is disposed in the hollow seal portion at the connection portion, the terminal portion of the rubber member has
Water leakage may occur due to a difference in rigidity between the hollow seal portion provided with the terminal portion and the hollow seal portion provided with no rubber member. In this case, the rigidity of the hollow seal portion in the section where the end portion of the rubber member is disposed is smaller than the rigidity of the hollow seal section in the section where the rubber member is disposed near the center thereof. like,
By deforming the terminal portion of the rubber member with respect to the central portion, a difference in rigidity between the terminal portion and the hollow seal portion where the rubber member is not provided can be reduced to prevent water leakage. .

[0010] In this case, the difference in rigidity may be reduced by forming the rigidity of the terminal portion of the rubber member to be smaller than the rigidity of the central portion.

[0011]

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

FIG. 1 is a perspective view of a principal part of a weather strip connecting method according to an embodiment of the present invention at the time of molding, and FIG. 2 is a perspective view of a principal part of a weather strip connected by the same connecting method. .

The weather strip 10 according to the present embodiment.
Is for sealing the vehicle body opening 1 in the trunk portion of the automobile shown in FIG. 4, and as shown in FIG.
2 and a hollow seal portion 14 having a substantially circular cross section which swells from the top of the mounting base portion 12 and abuts on the edge of the door 3. Here, the mounting base 12 is made of solid rubber,
Insert metal 16 is buried inside,
The hollow seal portion 14 is made of sponge rubber.

The weather strip 10 is extruded into the above-mentioned cross-sectional shape by extrusion molding.
Oa and 10a are connected to each other by a molding part 20 formed by molding to form a ring shape, thereby being integrally formed over the entire periphery of the vehicle body opening 1. Then, as shown in FIG. 4, the molded portion 20 is arranged at the lower edge of the vehicle body opening 1.

A method of connecting the weather strip 10 by molding according to the present embodiment will be described below.

As shown in FIG. 1, the weather strip 10
Are arranged in the molding die 22 with the both end portions 10a, 10a facing each other at a predetermined interval. that time,
The opposite ends 10a, 10a are opposed to each other via rubber members 24 inserted into the hollow seal portions 14, 14, respectively.
Set in a linked state. That is, the both ends 1
The rubber members 24 are inserted into the hollow seal portions 14 and 14 of 0a and 10a in a fitted state, whereby the both ends 10a and 10a are connected.

The rubber member 24 is a hollow rubber member made of sponge rubber, here a tubular rubber member having a substantially circular cross section, and has an outer diameter corresponding to the hollow seal portion 14 as shown in FIG. The outer diameter is set to be substantially the same as the inner diameter of the hollow seal portion 14.

In this state, rubber for forming the molded part 20 is press-fitted and vulcanized to form the molded part 20, thereby forming the both ends 10a, 10a. Is connected. Here, as shown in FIG. 2, the rubber members 24 are integrally fixed in the hollow seal portion 14 by the rubber constituting the molded portion 20, and the weather members on both sides thereof are separated from the molded portion 20. It is arranged over the strip ends 10a, 10a.

As described above, the rubber members 24 are inserted into the hollow seal portions 14, 14 of the opposite end portions 10a, 10a of the opposing weather strip and molded to connect the both end portions 10a, 10a. The weather strip 10 having such a hollow seal portion 14 can be connected without using a core as in the related art. Therefore, it is not necessary to provide a core hole. In addition, the operation of removing the core becomes unnecessary, and the occurrence of defective products due to the tearing of the weather strip at the time of the removal can be prevented. Furthermore, the core hole is eliminated from the product, so that the appearance is good. As described above, the productivity of the weather strip can be improved, and the appearance can be improved.

Further, the rubber member 24 can also act as a cushioning material for preventing interference between the door 3 and the body due to an overstroke when the door 3 is strongly closed.

The rubber member 24 needs to have a rigidity not to lose the pressure of the molding rubber at the time of molding, and is therefore slightly harder than the hollow seal portion 14 of the extruded weather strip 10. Preferably, there is.
When such a hard material is used, the rigidity of the terminal portion 24a of the rubber member 24 between the hollow seal portion 14 where the terminal portion 24a is disposed and the hollow seal portion 14 where the rubber member 24 is not disposed is increased. Water leakage may occur due to the difference. In such a case, as shown in FIG. 5, the terminal portion shape of the rubber member 24 is worked to reduce the rigidity difference.

In the example shown in FIG. 5 (a), a notch 26 extending from the end face toward the center is provided at the end 24a of the rubber member 24, whereby the rigidity of both ends 24a, 24a is increased. However, the rigidity of the rubber member 24 is smaller than the rigidity of other portions including the central portion. for that reason,
The rigidity of the hollow seal portion 14 in the section where the terminal portion 24a of the rubber member 24 is disposed is smaller than the rigidity of the hollow seal section 14 in the section where the rubber member 24 is disposed near the center. That is, the rigidity of the hollow seal portion 14 in the section where the rubber member 24 is
Decrease in the section where the terminal unit 24a is disposed. Therefore, a sudden change in rigidity of the hollow seal portion 14 from the section where the rubber member 24 is provided to the section where the rubber member 24 is not provided can be reduced, and a decrease in the sealing force near the boundary of the section where the rubber member 24 is provided is suppressed. , Water leakage is prevented.

In the example shown in FIGS. 5B and 5C, the end portion 24a of the rubber member 24 is formed so that the cross-sectional area becomes smaller toward the tip, so that both end portions 24a of the rubber member 24 are formed. The rigidity is set smaller than the rigidity at the center.

In the example shown in FIG. 5B, the end surface 28 of the terminal portion 24a of the rubber member 24 is inclined from the surface perpendicular to the longitudinal direction of the rubber member 24.
Is cut obliquely to make both end portions 24a, 24a
Is formed such that the stiffness gradually decreases toward the tip. In this case, the same effect as in FIG. 5A can be obtained.

In the example shown in FIG. 5 (c), the rubber member 24 is formed so that the thickness of the terminal portion 24a becomes gradually smaller than the thickness of other portions including the central portion. That is,
The outer diameter of the rubber member 24 is constant in the longitudinal direction.
By making the diameter d2 of the hollow portion 30a in 4a larger than the diameter d1 of the hollow portion 30 in the other portions, the thickness of both terminal portions 24a, 24a is reduced. In this case, the same effect as in FIG. 5A can be obtained. In addition, the rubber member 24 having such a different thickness is, for example, a so-called gradual change in which the cross-sectional shape extruded from the extruder is gradually changed by operating a die at a predetermined timing during the extrusion molding. It can be manufactured using extrusion techniques.

In the example shown in FIG. 5D, the outer diameter D2 of the end portion 24a of the rubber member 24 having a tubular shape is changed to the outer diameter D1 of the central portion.
The rigidity difference is reduced by forming the rigidity smaller. That is, in this case, since the thickness of the rubber member 24 is constant in the longitudinal direction, the rigidity of the terminal portion 24a is larger than that of the central portion, but when the rubber member 24 is disposed in the hollow seal portion 14 having a constant cross section. In the section where the terminal portion 24a is disposed, a larger space is secured between the rubber member 24 and the inner wall surface of the hollow seal portion 14.
Therefore, the stiffness is reduced with respect to the external force normally applied, and the same effect as that shown in FIG.

In the above-described embodiment, an example in which the hollow rubber member 24 is used has been described. However, a similar effect can be obtained with a solid rubber member. When a solid rubber member is used, the hollow seal portion 14 in the section where the rubber member 24 is disposed has a solid shape.

A rubber member 24 made of sponge rubber
Instead, a rubber member made of solid rubber can be used if necessary.

Further, the present invention is not limited to the case where both ends 10a, 10a of one weather strip 10 are connected, but is also applicable to the case where the ends of two weather strips are connected.

[0030]

According to the weather strip connecting method of the present invention, the core is used by inserting the rubber member into the hollow seal portion at the end of the weather strip facing each other and molding the rubber member. Instead, the ends can be connected to each other. Therefore, it is not necessary to provide a core hole. In addition, the operation of removing the core is not required, and the occurrence of defective products due to the tearing of the weather strip at the time of the removal can be prevented. Furthermore, the core hole is eliminated from the product, so that the appearance is good. This rubber member can also function as a cushioning material when the door is closed.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part when molding a weather strip according to an embodiment of the present invention.

FIG. 2 is a perspective view of a main part of the weather strip after connection in the embodiment.

FIG. 3 is a cross-sectional view of the weather strip according to the embodiment when the weather strip is attached to a vehicle body.

FIG. 4 is a perspective view showing a trunk portion of the automobile.

FIGS. 5A to 5D are perspective views each showing a modified example of the rubber member in the present embodiment.

FIG. 6A is a perspective view of a main part of a conventional weather strip connecting method at the time of molding, and FIG. 6B is a perspective view of a main part after the molding.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Weather strip 10a ... End part 14 ... Hollow seal part 20 ... Mold forming part 22 ... Molding die 24 ... Rubber member 24a ... Terminal part 26 ... Cut 28 ... End face

Claims (3)

[Claims] 1. A method for connecting end portions of a weather strip having a hollow seal portion extruded by molding, wherein the end portions of a weather strip to be connected are opposed to each other, and the end portions are connected to each other. A method of connecting a weather strip, wherein the parts are connected to each other via a rubber member inserted into the hollow seal part, and the molding is performed in this state. 2. The rigidity of the hollow seal portion in a section where the end portion of the rubber member is disposed is smaller than the rigidity of the hollow seal portion in a section near the center where the rubber member is disposed. 2. The method for connecting a weather strip according to claim 1, wherein a terminal portion of the rubber member is deformed with respect to a center portion thereof. 3. The method for connecting a weather strip according to claim 2, wherein the rigidity of the end portion of the rubber member is smaller than the rigidity of the central portion.