JP2000016193A - Automotive weather strip - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To improve the followability when assembling a weather strip to a flange and to prevent elongation. A large part of a mounting part, a hollow seal part, and a cover lip are made of sponge rubber, so that even when a body flange is bent in a flange surface direction, the followability when assembling the flange is good. To By arranging the solid rubber portion 5 (or the core wire 7) at the bending neutral position of the mounting portion 2, the rubber is suppressed from elongating.

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 weather strip attached to a body flange around an opening of a trunk room or the like of an automobile.

[0002]

2. Description of the Related Art FIGS. 4 and 5 are perspective views showing different types of rear trunk rooms 101 of an automobile 100, respectively. Generally, as shown in FIG. 6, an end portion 102 of an outer body is provided around an opening edge of a trunk room 101 of an automobile 100.
And the end 103 of the inner body are joined to form a body flange 104 whose free end faces the outside of the vehicle, and a weather strip 105 is attached so as to cover the body flange 104.

FIG. 7 is a cross-sectional view of a conventional general weather strip 105, and FIG. 8 is a cross-sectional view showing a state where a body flange is mounted. The weather strip 105 has a mounting portion 106 made of solid rubber and has a substantially U-shaped cross section for sandwiching the body flange 104, and is integrally formed with the mounting portion 106, and is elastically deformed by elastic contact with the trunk door 107. It has a hollow seal portion 108 made of sponge rubber that performs a sealing action, and a decorative lip 109 made of sponge rubber integrally formed with the leg portion 106b of the attachment portion 106. The attachment portion 106 is made of a band-shaped metal as a reinforcing material. A core material 110 is embedded.

[0004]

The weather strip 105 shown in FIGS. 7 and 8 has a band-shaped core material 110 embedded as a reinforcing material in a mounting portion 106 having a substantially U-shaped cross section. In the trunk room shown in FIG. 4, FIG. 4 and FIG.
There is a problem that it is difficult to follow the bent shape of the body flange 104 and the assemblability is deteriorated.

FIG. 9 is a sectional view of a weather strip proposed to improve the assemblability of the weather strip having the band-shaped core material 110 to a body flange.
The weather strip 112 is connected to the body flange 104.
A strip-shaped mounting portion 113 made of solid rubber, which is in contact with the flange surface of the base member, and a hollow seal portion 114 made of sponge rubber formed integrally with the mounting portion 113 and capable of elastically contacting the trunk door 107. Is adhered to the flange surface of the body flange 104 with a double-sided tape 115, and the body flange 10 is attached to the head of the mounting portion 113.
The cover lip 116 that covers the free end of No. 4 is integrally formed.

In this weather strip 112, as shown in FIG. 4, when the weather strip 112 is assembled to the trunk flange 104 of the trunk room, which is opened only at the top of the vehicle body, the bent shape of the corner 104a of the opening is perpendicular to the flange surface. Therefore, there is an advantage that the mounting portion 113 is bent in the plate thickness direction and can follow the bent shape of the body flange 104.

However, in a trunk room in which the opening as shown in FIG. 5 is cut from the top portion 101a of the vehicle body to the rear wall surface 101b, especially at the corner portion 101c from the top portion 101a to the rear wall surface, the body flange is formed. 104 will bend in the flange surface direction. When the weather strip 112 shown in FIG. 9 is made to follow such a three-dimensionally bent body flange 104, the mounting portion 113 is forced to bend in the plate surface direction, and hard mounting made of solid rubber is performed. Part 11
In the case of No. 3, there was a problem that it could not sufficiently cope with this.

[0008]

The present inventor has conducted intensive studies to solve the above-mentioned problems, and as a result, it has been assumed that a strip-shaped mounting portion is bonded to a flange surface of a body flange with a double-sided tape or the like. It has been found that if not only the seal portion but also the mounting portion is made of a soft material such as sponge rubber, it can cope with bending in the plate surface direction.

However, when assembling the weather strip to the body flange, at the bent portion of the body flange (including both the bending in the flange surface direction and the bending in the flange surface and vertical direction), the mounting portion is made of sponge rubber. Because of this, it is easy to stretch, and if it is attached in the stretched state, it peels off when the rubber shrinks due to aging, and also the hollow seal part may not be able to secure the desired seal height due to the stretch of the rubber, It is necessary to suppress the extension of the mounting part.

As means for suppressing the elongation of the mounting portion, if a measure is adopted in which a part of the mounting portion is made of solid rubber, or if a measure of burying a continuous core wire in the longitudinal direction is adopted, some measures are taken. The present inventors have found that the elongation of the mounting portion can be suppressed by the solid rubber and the core wire, and have completed the present invention.

In particular, when the body rubber is bent in the direction of the flange surface, if a solid rubber portion or a core wire is disposed on the bending center line of the mounting portion, that is, at the bending neutral position of the mounting portion, this portion is bent. It corresponds to the neutral position where neither expansion nor contraction occurs between the contracted part on the inner circumference side and the expanded part on the outer circumference side.From the body flange of the mounting part due to the change over time by the amount that no extra stress is applied to the solid rubber or the core wire This is effective in that peeling of the resin can be prevented.

As shown in FIG. 9, the mounting portion is made of a sponge-like band plate material, and a solid rubber portion provided on a part thereof has a height and width capable of suppressing the longitudinal expansion of the mounting portion. And it can be integrated with the sponge rubber as long as it can follow the bending of the body flange in the flange surface direction.

The core wire may function as a substitute for solid rubber, for example, any of a steel cord, a synthetic fiber cord, and an inorganic fiber cord. Particularly, aramid fiber, vinylon fiber having low elasticity and being easily bent. , Glass fiber and the like are preferable. Also, as the wire diameter of the core wire,
For example, about 0.5 to 1 mm can be exemplified.

Since the mounting portion is bonded to one flange surface of the body flange, a cover lip covering the free end of the body flange is preferably formed integrally with the mounting portion. If it is molded with sponge rubber, it is almost entirely composed of sponge rubber, and has excellent assemblability to the body flange.

An adhesive layer is formed on the flange-contacting surface of the mounting portion for bonding the mounting portion and the body flange. If a double-sided adhesive tape is used as this adhesive layer,
The formation of the adhesive layer can be easily performed. Also, the shape of the seal portion can be applied regardless of the shape of the hollow or lip.However, if the above-described means for suppressing the expansion of the rubber is applied to the mounting portion of the weather strip with the hollow seal, the rubber can be used. This is effective in that the collapse of the hollow seal portion due to elongation can be prevented.
Further, the present invention is particularly effective when applied to a weather strip for a trunk room, but is not limited to this, and it is needless to say that the present invention may be applied to a boarding opening such as a side door.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a weather strip according to a first embodiment, and FIG. 2 is a sectional view of the same.

[0017] Weather strip 1 according to the present embodiment.
As shown in FIG. 4 or FIG. 5, a free end is attached to a body flange 104 projecting outward from the periphery of a door opening of a trunk room 101 of an automobile 100 as shown in FIG. 4 or FIG. , Body flange 1
Band-shaped mounting portion 2 which is in contact with the flange surface 104a
And a hollow seal portion 3 that elastically contacts an opening / closing body 107 that opens and closes the opening portion to seal the periphery of the opening portion. A cover lip 4 that covers the free end of the flange 104 is provided.

The mounting part 2, the hollow seal part 3, and the cover lip 4 are entirely made of sponge rubber except for a part of the solid rubber part 5 of the mounting part 2, and are formed by an extruder (not shown).
And are integrally extruded.

The solid rubber portion 5 has a body flange 10
At a bending neutral position when the bending portion 4 is bent in the plane direction of the flange surface, that is, on a middle position 2c (bending center line 2c of the mounting portion 2c) between the bending inner peripheral edge 2a and the bending outer peripheral edge 2b of the mounting portion 2 in FIG. In addition, on the flange contact surface side, it is formed to have a height of about 幅 of the thickness of the mounting part 2 and about １ ／ of the height of the mounting part. The solid rubber portion 5 is extruded and formed integrally with most of the mounting portion 2 made of sponge rubber, the hollow seal portion 3, and the cover lip 4. Further, a double-sided adhesive tape 6 as an adhesive layer adhered to the flange surface is adhered to the flange contact surface of the mounting portion 2 where the solid rubber portion 5 is formed.

Therefore, when attaching the weather strip 1 to the body flange 104,
4 is bent in the direction perpendicular to the flange surface, or is bent in the direction of the flange surface.
Since the whole is substantially made of sponge rubber, it can respond flexibly to this. In addition, since the solid rubber portion 5 is provided at the bending neutral position 2c of the mounting portion 2, it is possible to prevent the entire mounting portion from extending, and in particular, the bending neutral position is set at the bending inner peripheral side of the mounting portion 2. Since it is a neutral position where there is no expansion or contraction between the contracted portion and the outer-side extended portion, accurate assembly without expansion to the body flange is possible, and no extra stress is applied to the solid rubber portion 5. For this reason, peeling of the mounting portion 2 from the body flange 104 due to a temporal change can be prevented.

FIG. 3 is a sectional view showing the second embodiment. In the second embodiment, the solid rubber portion 5 of the first embodiment is eliminated, and instead, the core wire 7 is provided at the bending neutral position of the mounting portion 2 and at the center position of the thickness of the mounting portion 2. Is buried. The core wire 7 is a monofilament made of aramid fiber having a low elasticity and bending easily and having a wire diameter of about 0.5 to 1 mm, and is provided continuously in the longitudinal direction of the weather strip. This core wire 7
Is integrally molded with the mounting part 2, the hollow seal part 3, and the cover lip 4 by an extruder at the same time.

The embedding of the core wire 7 at the bending neutral position of the mounting portion 2 is effective in suppressing elongation at the time of assembling, similarly to the arrangement of the solid rubber portion of the first embodiment.
The other configuration is the same as that of the first embodiment, and the description thereof is omitted.

[0023]

As is clear from the above description, according to the present invention, almost the entire weather strip is made of soft sponge rubber, so that it is easy to follow the three-dimensional bent shape of the body flange to be assembled. Further, since the solid rubber or the core wire is disposed at the bending neutral position of the mounting portion in contact with the body flange, there is an excellent effect that the rubber can be suppressed from elongating during assembly.

[Brief description of the drawings]

FIG. 1 is a perspective view of a weather strip according to a first embodiment of the present invention.

FIG. 2 is an enlarged sectional view of the same weather strip.

FIG. 3 is a sectional view of a weather strip showing a second embodiment.

FIG. 4 is a perspective view of an automobile having a trunk room in which only the top is opened.

FIG. 5 is a perspective view of an automobile having a trunk room opened to a top portion and a rear wall surface.

FIG. 6 is a cross-sectional view showing a joined state of the opening body flange.

FIG. 7 is a sectional view of a conventional general weather strip.

FIG. 8 is a cross-sectional view showing a state where the body flange is assembled.

FIG. 9 is a cross-sectional view of a conventional body flange-bonded weather strip.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Weather strip 2 Mounting part 3 Hollow sealing part 4 Cover lip 5 Solid rubber part 6 Double-sided adhesive tape 7 Core wire 104 Body flange

Claims (4)

[Claims] 1. A strip-shaped mounting portion which is in contact with a flange surface of a body flange at a peripheral edge of an opening of an automobile, and a seal which elastically contacts an opening / closing body which closes the opening so as to be able to open and close to seal the peripheral edge of the opening. And an adhesive layer is provided on a body flange contacting surface of the mounting portion, and a bending neutral position of the mounting portion when the body flange is bent in the flange surface direction. Except for the above, the weather strip for an automobile, wherein the entire mounting portion and the sealing portion are made of sponge rubber, and a solid rubber portion is provided at a bending neutral position of the mounting portion. 2. A belt-shaped mounting portion which is in contact with a body flange around an opening of an automobile, and a sealing portion which elastically contacts an opening / closing body for opening and closing the opening so as to seal the periphery of the opening. An automotive weatherstrip comprising: an adhesive layer provided on a body flange contact surface of the attachment portion; the entire attachment portion and the seal portion being made of sponge rubber; and the body flange extending in the flange surface direction. A weather strip for an automobile, wherein a core wire continuous in a longitudinal direction is embedded at a bending neutral position of the mounting portion when bending. 3. A weather strip for an automobile according to claim 1, wherein a cover lip covering a free end of said body flange is formed integrally with said mounting portion. 4. The weatherstrip for an automobile according to claim 1, wherein the adhesive layer is a double-sided tape for bonding the mounting portion and the body flange surface.