JP4407469B2 - Weather strip for automobile - Google Patents

Description

  The present invention relates to a weather strip for an automobile that seals between an opening / closing member that opens and closes a vehicle body opening such as an automobile door or a luggage and a periphery of the vehicle body opening.

In the following, description will be given by taking as an example a seal between the automobile door 2 and the peripheral edge 6 of the vehicle body opening.
As shown in FIG. 5, the seal between the automobile door 2 and the vehicle body opening peripheral edge 6 includes a door weather strip 160 attached to the outer periphery of the door frame such as the door frame 2 and an inner channel 3 of the door frame. The glass run 150 is attached to the outer periphery 6 of the vehicle body, and the opening trim weather strip 110 is attached to the flange 7 at the periphery 6 of the vehicle body opening.

  The glass run 150 houses the front end of the door glass 5 in a substantially U-shaped cross section composed of the vehicle outer side wall 151, the bottom wall 152, and the vehicle inner side wall 153, and the front ends thereof are the front ends of the vehicle outer side wall 151 and the vehicle inner side wall 153. The vehicle is sealed by a vehicle outer side seal lip 154 and a vehicle inner side seal lip 155 that extend from the vehicle.

  The door weather strip 160 attached to the outer periphery of the door 2 includes an attachment base portion 161 and a hollow seal portion 164 and a seal lip portion 166 formed integrally on the upper surface thereof. The mounting base 161 is fitted into a retainer 4 provided on the outer periphery of the door frame and fixed to the door frame. When the door 2 is closed, the seal lip 166 contacts the outermost side edge of the vehicle body opening periphery 6 to seal the gap between the front end of the door 2 and the vehicle outer edge 6 of the vehicle opening periphery 6. . At that time, the hollow seal portion 164 contacts the bulging portion inside the vehicle rather than the portion where the seal lip portion 166 of the vehicle body opening periphery 6 contacts, and seals between the door 2 and the vehicle body opening periphery 6. ing.

  At the opening of the vehicle body, there is an opening trim weather strip 110 attached to the flange 7 on the periphery 6 of the opening of the vehicle body. The door weather strip 160 is sealed further inside the vehicle than the portion where the periphery 6 of the opening of the vehicle body is sealed. is doing. The opening trim weather strip 110 is attached to the flange 7 by an attachment base 120 having a substantially U-shaped cross section, and the hollow seal portion 130 contacts and swells the bulging portion 2a of the door frame. The mounting base 120 is embedded with a core material 124 such as a metal insert in order to grip the flange 7.

  However, the peripheral edge 6 of the vehicle body opening has a corner portion or an unevenness along the shape of the vehicle body. For this reason, the opening trim weather strip 130 to be mounted on the peripheral edge 6 of the vehicle body opening needs to be flexible, and the core material 124 embedded in the mounting base 120 is made of a stretchable lath or separation type. Yes.

Therefore, in the portion to be mounted on the corner portion of the vehicle body opening peripheral edge 6, the position of the curved center that bends along the corner portion of the opening trim weather strip 130 and the hollow top portion of the hollow seal portion 130 are shifted, and the hollow seal portion 130. Buckling and wrinkles occur.
In addition, when one opening weather strip 110 is attached to the entire periphery of the vehicle body opening periphery 6, expansion and contraction occurs during the attachment. If this expansion and contraction is not controlled, an overlap or a gap will occur at the terminal portion where both terminals face and join.

  For this reason, a connection part is provided in the core material 124 embedded in the attachment base 120 (for example, refer to Patent Document 1), and a structure in which the attachment base 120 is formed of a hard material (for example, refer to Patent Document 2). In addition, there is one in which a thread is embedded in the mounting base 120 (see, for example, Patent Document 3).

However, when the connecting portion is provided on the core member 124 or when the attachment base 120 is formed of a hard material, the flexibility of the attachment base 120 of the opening trim weather strip 130 is reduced, and the corner of the vehicle body opening peripheral edge 6 is reduced. It takes time and effort to wear it while bending along the section. Further, when the yarn was embedded in the attachment base 120, the adhesive strength between the yarn and the attachment base 120 was insufficient, and a sufficient anti-stretching effect could not be obtained.
JP 50-85029 A JP 2002-240649 A JP 52-39217 A

  For this reason, an object of the present invention is to provide a weather strip for automobiles which prevents the weather strip mounting base from expanding and contracting, is easy to be mounted on the periphery of the opening of the vehicle body, and is less wrinkled on the seal portion when mounted. Is.

In order to solve the above problems, the present invention of claim 1 is a weather strip for sealing between an automobile door and a periphery of a vehicle body opening of an automobile.
The weather strip is attached to either the automobile door or the vehicle body opening periphery, and is integrally attached to the attachment base. The mounting base has a substantially U-shaped cross section, and a core material is embedded therein, and the core material is formed so as to be separable or extendable within the mounting base, and the outer surface of the mounting base When the band-shaped hard resin member is fused, and the band-shaped hard resin member is formed in a tape shape and has a plate-shaped metal insert embedded therein, and the mounting base is curved and mounted, the degree of deformation of the trim portion is the highest. A weather strip for automobiles, wherein the weather strip is fused to the center of curvature of the mounting base, which is a small portion .

  In the first aspect of the present invention, the weather strip includes a mounting base that is attached to either the automobile door or the periphery of the vehicle body opening, and a door that is integrally attached to the mounting base and contacts the periphery of the vehicle body opening or the door. Since there is a seal part that seals between the outer periphery of the vehicle body and the opening of the vehicle body, if the mounting base is attached to the outer periphery of the door frame or the periphery of the opening of the vehicle body, the seal portion will contact the peripheral edge of the vehicle body opening or the door when the door is closed. It is possible to seal between the door and the periphery of the opening of the vehicle body.

The attachment base portion has a substantially U-shaped cross section, and a core material is embedded therein. For this reason, the weather strip for automobiles can be easily mounted by inserting a flange formed on the outer periphery of the automobile door or the tip of the opening edge of the vehicle body door into the substantially U-shaped cross section of the mounting base. Further, since the core member is embedded in the mounting base portion, the flange formed on the outer periphery of the automobile door or the front edge of the vehicle body door opening edge can be firmly gripped.
Since the core material is formed so as to be separable or extendable within the mounting base, the mounting base can be flexibly mounted even at the corner along the outer periphery of the automobile door or the shape of the opening of the vehicle body door.

A band-shaped hard resin member is fused to the outer surface of the mounting base. This band-shaped hard resin member does not expand and contract in the longitudinal direction, but has flexibility to the extent that it can be curved along the corner portion. For this reason, the flexibility of the mounting base is not impaired, and it does not expand and contract in the longitudinal direction. Even when one weather strip is attached to the outer periphery of the automobile door or the periphery of the opening of the vehicle body over the entire circumference. , There is no gap between the terminals, or the terminals overlap each other and cannot be fitted into the flange. Moreover, abnormal deformation of the mounting base can be prevented.

Moreover, in this invention of Claim 1 , the strip | belt-shaped hard resin member is melt | fused by the curve center of the attachment base when the attachment base is curved and mounted | worn. For this reason, the mounting base can be bent along the curved portion in the curved portion at the outer periphery of the automobile door or the corner portion such as the opening edge of the vehicle body door. It does not wrinkle or buckle, and it can seal well and looks good.
Furthermore, by using a plate-shaped metal insert, expansion and contraction in the longitudinal direction of the belt-shaped hard resin member can be reliably prevented. Further, since the plate-like metal insert has flexibility, the trim portion can be deformed along a curved portion such as the outer periphery of the automobile door or the opening edge of the vehicle body door. And since the intensity | strength of a metal strip | belt-shaped insert is large, the whole thickness of a strip | belt-shaped hard resin member can be made thin and lightened.

According to a second aspect of the present invention, the belt-like hard resin member is a weather strip for automobiles that is attached to a surface that is difficult to see from inside or outside the vehicle in a weather strip attached state.

According to the second aspect of the present invention, since the belt-like hard resin member is attached to a surface that is difficult to see from the inside or outside of the vehicle in the attached state of the weather strip, the appearance of the weather strip and its attaching portion is not impaired. Moreover, it is not necessary to consider the surface state of the belt-shaped hard resin member.

According to a third aspect of the present invention, there is provided an automotive weather strip in which the mounting base portion is formed of a solid material and the seal portion is formed of a sponge material in a hollow shape.

In the third aspect of the present invention, since the mounting base is formed of a solid material, the flange on the periphery of the automobile door or the vehicle body opening can be reliably gripped.
Since the seal portion is formed of a hollow sponge material that abuts either the automobile door or the vehicle body opening peripheral edge, the seal portion can flexibly abut along the shape of the automobile door or the vehicle body opening peripheral edge, High nature.

According to a fourth aspect of the present invention, the weather strip is an automotive weather strip formed of an EPDM rubber or an olefinic thermoplastic elastomer, and the band-shaped hard resin member is formed of an olefinic synthetic resin.

In the present invention of claim 4 , the weather strip is formed of EPDM rubber or an olefinic thermoplastic elastomer, and the belt-like hard resin member is formed of an olefinic synthetic resin. The adhesiveness of the olefin-based synthetic resin is good, and the band-shaped hard resin member can be firmly fixed integrally when the band-shaped hard resin member is attached to the weather strip.
Further, since the weather strip is formed of an olefinic thermoplastic elastomer or EPDM rubber, and the band-shaped hard resin member is formed of an olefinic synthetic resin, a product with good weather resistance can be obtained. Moreover, since it is the same olefin resin / rubber, it can be recycled without separation, and an easily recyclable product can be obtained.

In the present invention, since the band-shaped hard resin member is fused to the mounting base of the weather strip, the mounting base does not expand and contract when the weather strip is mounted on the periphery of the automobile door or the vehicle body opening. No wrinkles or buckling on the seal part when attached to.

  The embodiment of the present invention will be described by taking the opening trim weather strip 10 as an example. The present invention can be used not only for the opening trim weather strip 10 but also for a weather strip used for a vehicle body opening and a portion for closing the opening, such as a luggage weather strip.

The present invention will be described with reference to FIGS.
FIG. 1 is a cross-sectional view of the opening trim weather strip 10 of the present invention, and is a cross-sectional view taken along the line AA in FIG. FIG. 2 is a cross-sectional view of the opening trim weather strip 10 according to another embodiment of the present invention, and is a cross-sectional view taken along the line AA in FIG.
FIG. 3 is a perspective view showing an attachment state to the vehicle body opening peripheral edge 6 in a state where the door of the automobile is opened. FIG. 4 is a front view of the opening trim weather strip 10 attached to the periphery 6 of the vehicle body opening.

  As shown in FIG. 3, the vehicle body 1 of the automobile has a vehicle body opening, and the vehicle body opening is opened and closed by a door 2. The periphery of the vehicle body opening forms a periphery 6 of the vehicle body opening, and the periphery 6 of the vehicle body opening 6 is a flange 7 (see FIGS. 1 and 2) with the tip of the panel constituting the vehicle body welded. An opening trim weather strip 10 is attached to the flange 7 for sealing between the periphery 6 of the vehicle body opening and the door 2.

The opening trim weather strip 10 is linearly formed by extrusion. As shown in FIG. 4, the straight opening trim weather strip 10 is attached to the flange 7 so as to form an annular shape along the shape of the periphery 6 of the vehicle body opening. The mounting is performed sequentially from one end of the opening trim weather strip 10 to the flange 7, and when the mounting is completed, the other end is joined to the one end. As will be described later, the opening trim weather strip 10 of the present invention is welded with the band-shaped hard resin member 40, so there is almost no expansion and contraction, and the terminals can be joined together without a gap.
In addition, as shown in FIG. 4, you may adhere | attach the terminals of the opening trim weatherstrip 10 before mounting | wearing, and you may make it cyclic | annular.

Next, the cross-sectional shape of the opening trim weather strip 10 will be described with reference to FIG.
The opening trim weather strip 10 is in contact with a trim portion (mounting base portion) 20 attached to the flange 7 and having a substantially U-shaped cross section, and a bulging portion 2a of the door frame of the door 2, so that the door 2 and the periphery of the opening of the vehicle body 6 has a hollow seal portion (seal portion) 30 that seals between the two.

The trim portion 20 has a substantially U-shaped cross section including a vehicle outer side wall 21, a vehicle inner side wall 22, and a bottom wall 23, and a core member 24 is embedded therein.
The core member 24 is made of sheet metal, wire, or hard synthetic resin. In the case of sheet metal or hard synthetic resin, a large number of strip-shaped bone fragments are arranged in parallel in the width direction, and the strip-shaped bone fragments are connected in a ladder shape or fishbone shape in the longitudinal direction, or a strip-shaped bone A continuous zigzag piece is used. In order to increase the flexibility of the trim part 20, it is possible to use one that separates the connecting portions of the strip-shaped bone pieces one by one or plural after the core material 24 is embedded. A continuous zigzag of strip-shaped bone fragments is also stretchable in the longitudinal direction and has flexibility.
The wire core material 24 is a so-called wire carrier type in which the wire is bent in a zigzag shape and held by a plurality of threads in the longitudinal direction.

Inside the trim portion 20, a plurality of vehicle outer side holding lips 26 and vehicle inner side holding lips 27 are extended from the vehicle outer side wall 21 and the vehicle inner side wall 22 toward the oblique bottom wall 23, respectively. When the flange 7 at the periphery 6 of the vehicle body opening is inserted into the inside of the trim portion 20 having a substantially U-shaped cross section, the vehicle outer side holding lip 26 and the vehicle inner side holding lip 27 come into contact with the side surface of the flange 7 and the opening trim The weather strip 10 can be held.
A vehicle outer side seal lip 28 that is bent in the inner direction of the trim portion 20 may be provided at the tip of the vehicle outer side wall 21. The tip of the vehicle outer side seal lip 28 abuts on the flange 7 to seal between the flange 7 and the trim portion 20.

  A vehicle interior cover lip 29 is provided in a vehicle interior direction from a continuous portion of the vehicle interior side wall 30 and the bottom wall 23. With this vehicle inner side cover lip 29, it is possible to cover the mounting portion between the trim portion 20 and the flange 7 from the vehicle inner side and the belt-like hard resin member 40 that is welded or bonded to the outer surface of the trim portion 20 to be described later. Can be improved.

As shown in FIG. 1, a strip-shaped hard resin member 40 is welded to the outer surface of the trim portion 20 in the longitudinal direction.
The band-shaped hard resin member 40 is formed of a hard synthetic resin, and for example, polyethylene, polypropylene, nylon, or the like can be used.
When the band-shaped hard resin member 40 is formed of an olefin-based synthetic resin such as polyethylene or polypropylene and the opening trim weather strip 10 is formed of an EPDM rubber or an olefin-based thermoplastic elastomer, the EPDM rubber or the olefin-based thermoplastic is used. The adhesiveness between the elastomer and the olefin-based synthetic resin is good, and when the strip-shaped hard resin member 40 is attached to the opening trim weather strip 10, the strip-shaped hard resin member 40 can be easily and firmly fixed firmly by heating or the like. . In the case of a sponge rubber material, this heating can be attached by pressing the band-shaped hard resin member 40 when the trimmed portion 20 after vulcanization and foaming is hot .

  Further, when the opening trim weather strip 10 is formed of an olefin-based thermoplastic elastomer or EPDM rubber, and the belt-shaped hard resin member 40 is formed of an olefin-based synthetic resin, a product having good weather resistance can be obtained. The opening trim weather strip 10 and the belt-like hard resin member 40 are both olefin-based, and can be used after being pulverized and recycled together without being separated.

  The band-shaped hard resin member 40 is a hard synthetic resin and does not expand or contract in the longitudinal direction when the opening trim weather strip 10 is attached to the vehicle body opening peripheral edge 6, but is flexible to the extent that it can be curved along the corner portion. It has sex. Therefore, the flexibility of the trim portion (mounting base portion) 20 is not impaired, and it does not expand and contract in the longitudinal direction, so that one opening trim weather strip 10 is attached to the outer periphery of the automobile door 2 or the periphery of the vehicle body opening. Even when it is attached to the entire circumference in FIG. 6, there is no shortage of the length, and there is no gap between the terminals, or the entire length is extended and the terminals do not overlap each other and cannot be fitted into the flange.

A reinforcing material 41 is embedded in the band-shaped hard resin member 40. As the reinforcing member 41, a wire or a plate-like metal insert can be used. The plate-like metal insert can reliably prevent expansion and contraction in the longitudinal direction of the band-shaped hard resin member 10. Further, since the plate-like metal insert has flexibility, the trim portion 20 can be deformed along the outer periphery of the automobile door 2 or a curved portion such as the vehicle body door opening edge 6.
Moreover, since the strength of the metal band-like insert is large, the entire thickness of the band-like hard resin member 40 can be reduced and lightened.

  The attachment position of the band-shaped hard resin member 40 is fused or bonded to the center of the curve when the trim portion 20 is mounted in a curve. In other words, the bending center is a portion with the least deformation degree of the trim portion 20 when the trim portion 20 is mounted while being bent. For this reason, the trim part 20 can be bent along the curved part in the curved part such as the outer periphery of the automobile door 2 or the vehicle body opening peripheral edge 6, and the hollow seal part 30 is wrinkled even if the trim part 20 is curved. There is no need to buckle or buckle, it is possible to secure a sealing property, and it looks good.

In FIG. 2, the form of the reference example of the strip | belt-shaped hard resin member 40 is shown.
The band-shaped hard resin member 40 of FIG. 2 does not have the reinforcing material 41 inside. In the case where the hard synthetic resin constituting the belt-like hard resin member 40 has a large tensile tension and does not require the reinforcing material 41, the reinforcing material 41 can not be used for weight reduction.

Next, the hollow seal part (seal part) 30 will be described.
In the embodiment of FIG. 1, the hollow seal portion 30 has a hollow shape whose cross section is substantially circular or substantially elliptical. A lip shape may be used instead of the hollow shape.
The hollow seal portion 30 is integrally formed in the vehicle outward direction from the outer surface of the vehicle outer side wall 21 of the trim portion 20. A tip protrusion 31 is provided at the tip of the hollow seal portion 30. The hollow seal portion 30 contacts the bulging portion 2a of the door frame when the door is closed, and seals the gap between the door 2 and the vehicle body opening periphery 6.
Moreover, the air hole 32 is provided in the hollow seal part 30, and the door closing force is reduced when the door is closed.
The hollow seal portion 30 can be formed of a sponge material in order to increase flexibility.

Next, a method for manufacturing the door opening trim weather strip 10 will be described.
This door opening trim weather strip 10 is formed by extrusion molding, and a core material 24 made of metal or hard synthetic resin is embedded in the trim portion 10, so that the solid rubber and the hollow seal constituting the core material 24 and the trim portion 10 are embedded. The sponge rubber constituting the portion 30 is integrally extruded by an extruder.

  In molding the opening trim weather strip 10, synthetic rubber, thermoplastic elastomer, and soft synthetic resin are used as molding materials. For example, EPDM rubber is used for synthetic rubber, polyolefin elastomer is used for thermoplastic elastomer, and soft synthetic resin is used. Soft vinyl chloride or the like is used. In order to improve flexibility, it is preferable to foam these materials and use them as sponge materials.

  In the case of synthetic rubber, it is conveyed to a vulcanizing tank after extrusion and heated by hot air or high frequency to vulcanize and foam. In the case of a thermoplastic elastomer or a soft synthetic resin, it is heated and foamed simultaneously with or after extrusion, and then cooled and solidified. Thereafter, it is cut to a predetermined length to produce an extruded part.

The band-shaped hard resin member 40 is formed by extruding the band-shaped hard resin member 40 in a tape shape from another extrusion molding machine in the step of forming the opening trim weather strip 10. The extruded belt-shaped hard resin member 40 is guided to the attachment portion of the vulcanized hot rim opening trim weather strip 10, and the belt-shaped hard resin member 40 and the opening trim weather strip 10 are moved. Adhere firmly. The band-shaped hard resin member 40 may be previously wound in a tape shape on a reel or the like and attached to the opening trim weather strip 10 using the band-shaped hard resin member 40.
If without the vulcanization process, as possible out that either crimping the trim portion 20 at a high temperature immediately after extrusion of the strip-shaped hard resin member 40, or a strip-shaped hard resin member 40 is heated by a burner or the like, welded.

In order to improve the assembling property of the opening trim weather strip 10 for the band-shaped hard resin member 40, the width and width of the resin tape are controlled in order to control the elongation and meandering according to each opening trim weather strip 10. The thickness can be changed.
Although the embodiment of the present invention has been described by taking the opening trim weather strip 10 as an example, the present invention can also be used for various weather strips mounted on the periphery of the vehicle body opening.

The opening trim weather strip 10 manufactured in this way is cut to a predetermined size and attached to the flange 40 at the vehicle body opening edge of the automobile.
The flange 7 is formed by joining and welding the vehicle outer panel and the vehicle inner panel at the opening edge of the vehicle body of the automobile.
When the opening trim weather strip 10 is attached to the flange 7, the trim part 20 is inserted into the flange 7 as it is, or the trim part 20 is temporarily fixed with a substantially U-shaped opening slightly opened, It can also be installed by forming.
In this roll forming system, when the flange 7 is positioned and temporarily fixed inside the trim portion 20 having a substantially U-shaped cross section, the opening side of the trim portion 20 is slightly open, so that the holding lip is not obstructed. Easy.

It is sectional drawing of the door opening trim weather strip which is embodiment of this invention, and is sectional drawing along the AA of FIG. It is sectional drawing of the door opening trim weather strip which is a form of a reference example , and is sectional drawing along the AA line of FIG. It is a perspective view of the side of a car. It is a front view of the door opening trim weather strip which is an embodiment of the invention. It is a partial cross section figure in the state where the conventional door opening trim weather strip was attached to the opening edge of a car.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Door opening trim weather strip 20 Trim part 21 Car outer side wall 22 Bottom wall 23 Car inner side wall 24 Core material 30 Hollow seal part 40 Band-shaped hard resin member 41 Reinforcement material

Claims (4)

In the weather strip that seals between the car door and the car body opening periphery,
The weather strip is attached to either the automobile door or the vehicle body opening periphery, and is integrally attached to the attachment base, and is in contact with the vehicle body opening periphery or the door to contact the door and the vehicle body. Having a seal part that seals between the periphery of the opening,
The mounting base has a substantially U-shaped cross section, and a core material is embedded therein, the core material is formed to be separable or extendable within the mounting base, and a band-shaped hard resin member is formed on the outer surface of the mounting base. The band-shaped hard resin member that is fused and formed in a tape shape and has a plate-shaped metal insert embedded therein, and the trim portion is least deformed when the mounting base is curved and mounted. A weather strip for automobiles, wherein the weather strip is fused to the center of curvature of the mounting base . 2. The automobile weather strip according to claim 1, wherein the belt-like hard resin member is attached to a surface that is difficult to see from inside or outside the vehicle in a weather strip attached state. The automobile weather strip according to claim 1 or 2 , wherein the mounting base portion is formed of a solid material, and the seal portion is formed of a sponge material in a hollow shape. The automobile weather according to any one of claims 1 to 3 , wherein the weather strip is formed of EPDM rubber or an olefinic thermoplastic elastomer, and the band-shaped hard resin member is formed of an olefinic synthetic resin. strip.

Images