JP4300477B2 - Weather strip for automobile - Google Patents

Description

  The present invention relates to an automotive weather strip that seals between an automobile door and a vehicle body opening periphery.

As shown in FIG. 5 , the seal between the automobile door 1 and the vehicle body opening peripheral edge 6 includes a door weather strip 110 attached to the outer periphery of the door 1 such as the door frame 2, and the inner peripheral glass of the door frame 2. The glass run 120 is attached to the run channel 3 and the opening weather strip 130 is attached to the flange 6a at the periphery 6 of the vehicle body opening.

The glass run 120 houses the front end of the door glass 5 in a substantially U-shaped cross section composed of the vehicle outer side wall 121, the bottom wall 122, and the vehicle inner side wall 123, and the front ends thereof are the front ends of the vehicle outer side wall 121 and the vehicle inner side wall 123. The vehicle outer side seal lip 124 and the vehicle inner side seal lip 125 that are extended from the vehicle abut and seal.
The opening weather strip 130 attached to the flange 6a at the periphery 6 of the opening of the vehicle body is attached to the flange 6a by a trim portion 131 having a substantially U-shaped cross section, and the hollow seal portion 132 abuts on the door frame 2 for sealing.

  The door weather strip 110 attached to the outer periphery of the door frame 2 includes an attachment base portion 111 and a hollow seal portion 114 and a seal lip portion 116 formed integrally on the upper surface thereof. The attachment base 111 is fixed to the door frame 2 by being fitted into the retainer 4 attached to the outer periphery of the door frame 2. When the door is closed, the seal lip 116 contacts the outermost side edge of the vehicle body opening periphery 6 to seal the gap between the front end of the door frame 2 and the vehicle opening edge 6 of the vehicle opening periphery 6. . At that time, the hollow seal portion 114 is in contact with the bulging portion slightly inside the vehicle rather than the portion where the seal lip portion 116 of the vehicle body opening periphery 6 is in contact, and seals between the door 1 and the vehicle body opening periphery 6. is doing.

However, the operation of fitting the door weather strip 111 into the retainer 4 is troublesome because the attachment base 111 is deformed and fitted or inserted from one end in the longitudinal direction.
Therefore, as shown in FIG. 6 , in order to improve the workability of attachment to the retainer 4, the synthetic resin tape 117 is affixed to the attachment base 111 to make it easy to slip, and the attachment base 111 can be easily fitted into the retainer 4. (For example, refer to Patent Document 1).
Furthermore, when attaching the door weather strip 110 to the retainer 4, first, the operation | work which attaches the retainer 4 to the door frame 2 by welding etc. is required, a weight increases by the part of the retainer 4, and cost also becomes high.

Therefore, the door weather strip 110 is directly attached to the door frame 2 using the double-sided adhesive tape 118.
In this case, in order to affix the door weather strip 110 to the door frame 2 in order from the end, the door weather strip 110 is formed of sponge rubber, and the door weather strip 110 expands and contracts during the bonding operation. Wrinkles may occur on the door frame 2. Therefore, as shown in FIG. 7 , in order to prevent the extension of the door weather strip 110, the mounting base 111 and the seal lip 116 are formed of a hard synthetic resin or hard rubber, and a hollow seal portion is used to ensure sealing performance. 114 is made of flexible sponge rubber (see, for example, Patent Document 2).

However, when the hard synthetic resin or hard rubber and sponge rubber are extruded together at the same time, each material is different, so it becomes double extrusion molding, making it difficult to balance the extrusion molding, and the extrusion speed decreases. Also, vulcanization and foaming processes were necessary, and productivity was not good.
JP-A-8-127235 (page 1-2, FIG. 1) Japanese Patent Laid-Open No. 1-229718 (page 2-3, FIG. 1)

  For this reason, the present invention prevents the weather strip 110 from being stretched at the time of mounting on the door or the periphery of the opening of the vehicle body, so that the weather strip can be easily mounted. An object of the present invention is to provide a weather strip for an automobile which prevents the outer periphery of the door frame or the periphery of the opening of the vehicle body from being wrinkled.

In order to solve the above-mentioned problems, the present invention according to claim 1 is a weather strip for sealing between a car door and a car body opening periphery of the car, and the weather strip is either on the car door or the car body opening periphery. a mounting base that is attached to the other hand, has a seal portion for sealing between the door and the vehicle body opening rim in contact with the vehicle body opening rim or the door integrally attached to the mounting base portion, the seal portion, the door A lip-shaped seal lip portion that seals between the front end of the vehicle and the vehicle outer side edge 6 of the vehicle body opening, and a hollow hollow seal that abuts the vehicle body opening rim on the vehicle inner side than the portion where the seal lip abuts Formed from and
Attach a double-sided adhesive tape to attach the weather strip to the back of the mounting base,
A resin tape made of synthetic resin that is continuous in the longitudinal direction is affixed to the outer surface of the weather strip, and the resin tape is located near the base of the outer surface of the seal lip and outside the vehicle when the weather strip is attached. The weather strip is attached to a surface difficult to see .

  In the first aspect of the present invention, the weather strip includes a mounting base attached to the periphery of the automobile door or the opening of the vehicle body, and a mounting base that is integrally attached to the upper surface of the mounting base and contacts the periphery of the opening of the vehicle body or the door. Since it has a seal part that seals between the periphery of the opening, when the mounting base is attached to the outer periphery of the door frame or the periphery of the vehicle body opening, the seal part abuts on the periphery of the vehicle body opening or the door when the door is closed. The space between the door and the periphery of the vehicle body opening can be sealed.

Since the double-sided adhesive tape for attaching to the outer periphery of the automobile door or the vehicle body door opening edge is attached to the back surface of the attachment base, it is not necessary to attach a retainer to the door frame or the like, and the weight of the automobile door or the vehicle body can be reduced. By sticking to the outer periphery of the door frame or the door opening edge of the vehicle body with the double-sided adhesive tape, the weather strip can be easily attached along the shape of the door frame or the like.
Since a resin tape made of synthetic resin that is continuous in the longitudinal direction is attached to at least one outer surface of the weather strip, the resin tape does not easily expand and contract. When attaching to the door frame, the attachment base of the weather strip does not expand and contract, and the weather strip does not shift from the door frame or the like at the time of attachment, thereby preventing wrinkles.

In the first aspect of the present invention, the seal portion is a lip-shaped seal lip portion that seals between the door front end and the vehicle outer side edge of the periphery of the vehicle body opening, and the vehicle interior side than the portion where the seal lip portion abuts. Since it is formed of a hollow seal portion that is in contact with the periphery of the vehicle body opening, it can double seal between the door and the door opening of the vehicle body when the door is closed, such as rainwater, dust, noise, etc. Can be prevented from entering the passenger compartment. In addition, the seal lip portion can close the gap between the front end of the door and the vehicle outer side edge at the periphery of the vehicle body opening, and the appearance is good.

Further, in the present invention of claim 1 , the double-sided adhesive tape is attached to the back surface of the attachment base portion, and the resin tape is attached to a surface that is difficult to see from the outside in the attachment state of the weather strip other than the attachment base portion. For this reason, a double-sided adhesive tape and a resin tape can be affixed on different surfaces of the weather strip, and the resin tape can be affixed without being restricted by the double-sided adhesive tape. It is possible to apply a resin tape to a position where the weather strip is most easily extended during the attaching operation, or to apply a resin tape to a position where the weather strip is most easily applied. Since a resin tape is affixed to a surface that is difficult to see from outside the vehicle, it is preferable in terms of design.
Further, the width and thickness of the resin tape can be selected regardless of the double-sided adhesive tape according to the easiness of extension of the weather strip.

According to the present invention of claim 2 , the resin tape is a weather strip in which a metal strip-like insert is embedded.

In the second aspect of the present invention, since the metal strip-like insert is embedded in the resin tape, the tensile strength of the resin tape can be increased and the weather strip can be reliably prevented from being stretched. Moreover, since the strength of the metal band-like insert is large, the entire thickness of the resin tape can be reduced and lightened, and the thickness of the mounting base portion and the like can be reduced.

The present invention of claim 3 is a weather strip in which a reinforcing yarn is embedded in a resin tape.

In this invention of Claim 3 , since the reinforcement thread | yarn was embed | buried under the resin tape, while being able to make the tensile strength of a resin tape strong, a softness | flexibility is high compared with a metal strip | belt-shaped insert, According to the shape of a door frame. Easy to apply weather strip. Further, it is lighter than the metal strip-like insert, and is preferable for reducing the weight of the weather strip.

  In the present invention, since the resin tape made of a synthetic resin continuous in the longitudinal direction is attached to at least one outer surface of the weather strip, the attachment base of the weather strip expands and contracts when the double-sided adhesive tape is attached to the door frame. Therefore, the mounting work to the door or the vehicle body is easy, and the weather strip does not wrinkle at the time of mounting.

An embodiment of the present invention will be described with reference to FIGS .
FIG. 4 is a side view of the automobile. As shown in FIG. 4 , the door frame 2 is provided in the upper part of the door 1 of a motor vehicle, and the door glass 5 is attached so that raising / lowering is possible. That is, a door weather strip 10 or the like is attached to the outer periphery of the door frame 2 to seal between the door 1 and the vehicle body opening periphery 6.
A channel 3 is provided on the inner periphery of the door frame 2, and a glass run is attached in the channel 3 to guide the raising and lowering of the door glass 5 and to seal between the door glass 5 and the door frame 2. is doing.

1, Ri sectional view der of the door frame 2 portion along the A-A line in FIG. 4 is a reference view showing a shape of the door weather strip 10 of the present invention.
The door weather strip 10 is formed into a long shape by extrusion molding, and a portion corresponding to the corner portion of the door frame 2 is formed by molding.
A cross-sectional shape of the door weather strip 10 of the first embodiment attached to the outer periphery of the door frame 2 is shown in FIG. The cross-sectional shape of the extruded portion of the first embodiment is formed from an attachment base portion 11 attached to the outer periphery of the door frame 2 and a seal portion that seals between the door 1 and the vehicle body opening periphery 6. The seal portion has a lip-like shape that seals between the front end of the door 1 and the side edge of the vehicle body opening peripheral edge 6 on the outside of the vehicle, and the seal lip portion 16 is slightly more than the portion where the seal lip portion 16 abuts. It is formed from a hollow seal portion 14 having a hollow shape that abuts the inner periphery 6 of the vehicle body opening.

The mounting base 11 has a substantially plate shape with a slightly thicker cross section on the outside of the vehicle, and mounting base ridges 13 and 13 are formed on the bottom surface so as to protrude downward continuously in the longitudinal direction on both sides in the width direction. Yes.
Near the upper surface of the mounting base 11, a hollow mounting base hollow portion 12 is provided near the center thereof. For this reason, while being able to reduce the weight of the door weather strip 10, the softness | flexibility of the attachment base 11 can be improved.

As described above, the seal lip portion 16 and the hollow seal portion 14 are provided on the upper surface of the attachment base portion 11. The seal lip portion 16 extends in a lip shape from the vehicle outer side on the upper surface of the mounting base 11, and the vehicle outer projection 16 b is provided on the vehicle outer surface near the tip. The vehicle exterior protrusion 16 b abuts against the back surface of the front end of the door frame 2 and seals between the door frame 2 and the door weather strip 10.
When the door is closed, the front end portion 16a of the seal lip portion 16 comes into contact with the outermost portion of the vehicle body opening peripheral edge 6, that is, the portion that forms the side outer surface of the automobile corresponding to the front end of the door frame 2, thereby 1 and a gap between the peripheral edge 6 of the vehicle body opening are sealed.

The hollow seal portion 14 has a hollow shape with a circular or elliptical cross section, and one end portion extends from the inner side of the upper surface of the mounting base portion 11, and the other end portion is on the inner side of the seal lip portion 16. It extends from the base of the surface.
When the door is closed, the tip of the hollow seal portion 14 comes into contact with the bulging portion of the vehicle body opening peripheral edge 6 slightly inside the vehicle from the portion where the seal lip portion 16 of the vehicle body opening peripheral edge 6 comes into contact. The space between the vehicle body opening periphery 6 is sealed. The hollow seal portion 14 and the seal lip portion 16 can double seal between the door 1 and the vehicle body opening periphery 6.

  The resin tape 17 is made of a synthetic resin and hardly stretches in the longitudinal direction. For example, olefinic synthetic resins such as polyethylene and polypropylene, or nylon. This synthetic resin is formed long in a strip shape, and the thickness is preferably 100 μm or more and 1 mm or less. If it is 100 μm or less, sufficient resistance against elongation cannot be obtained. On the other hand, if the thickness is 1 mm, the flexibility is lost and the weight increases if it is too thick.

When the resin tape 17 is formed of an olefin-based synthetic resin such as polyethylene or polypropylene and the door weather strip 10 is formed of an EPDM rubber or an olefin-based thermoplastic elastomer, the EPDM rubber or the olefin-based thermoplastic elastomer and the olefin-based resin are used. The adhesiveness of the synthetic resin is good, and when the resin tape 17 is attached to the door weather strip 10, the resin tape 17 can be easily and firmly fixed firmly by heating or the like. In the case of a sponge rubber material, this heating can be performed by pressing the resin tape 17 when the mounting base 11 after vulcanization and foaming is hot.
When using a material such as nylon, an adhesive may be used.

  Further, when the door weather strip 10 is formed of an olefin-based thermoplastic elastomer or EPDM rubber, and the resin tape 17 is formed of an olefin-based synthetic resin, a product having good weather resistance can be obtained. Further, the door weather strip 10 and the resin tape 17 are both olefin-based, and can be used after being pulverized and recycled together without being separated.

Next, the embodiment shown in FIG. 2 will be described.
In the embodiment shown in FIG. 2 , the double-sided adhesive tape 18 is attached to the back surface of the attachment base 11, and the resin tape 17 is attached to a surface that is difficult to see from the outside in the attachment state of the door weather strip 10 other than the attachment base 11. . In the form of FIG. 2 , the seal lip portion 16 is attached near the base of the vehicle outer surface. For this reason, after the door weather strip 10 is attached to the door frame 2, the resin tape 17 is hidden at the front end portion of the door frame 2, and the resin tape 17 cannot be seen from the outside of the vehicle.

The double-sided adhesive tape 18 and the resin tape 17 can be applied to different surfaces of the door weather strip 10, and the resin tape 17 is applied to the other surface of the door weather strip 10 without being restricted by the double-sided adhesive tape 18. The resin tape 17 can be pasted at the position where it is most likely to extend during the pasting operation, or the resin tape 17 can be pasted at the position where the door weather strip 10 is most easily pasted.
Further, the width and thickness of the resin tape 17 can be selected irrespective of the double-sided adhesive tape 18 according to the easiness of extension of the door weather strip 10.

FIG. 3 is a reference diagram showing a form of the resin tape 17 that can be used in the present invention. Compared with the resin tape 17 of FIG. 2 , a metal strip-like insert 17 a or a reinforcing thread 17 b is embedded in the resin tape 17. The only difference is that
A resin tape 17 is first attached to the attachment base 11. After the resin tape 17 is attached, the double-sided adhesive tape 18 is attached to the resin tape 17. As described above, the metal tape-like insert 17a or the reinforcing thread 17b is embedded in the resin tape 17.

  The metal strip-like insert 17a is made of a thin metal plate such as stainless steel. When the metal strip-like insert 17a is embedded in the resin tape 17, the tensile strength of the resin tape 17 can be increased, and the elongation of the door weather strip 10 can be reliably prevented. Moreover, since the tensile strength of the resin tape 17 can be increased, the entire thickness of the resin tape 17 can be reduced, and the thickness of the mounting base 11 and the like can be reduced.

  The reinforcing yarn 17b uses a fiber having a high tensile strength such as a polyester fiber or an aromatic polyamide fiber, and an adhesive is applied to the fiber and then embedded in the resin tape 17. Since the reinforcing thread 17 b is embedded in the resin tape 17, the tensile strength of the resin tape 17 can be increased, and the flexibility is higher than that of the metal strip-like insert 17 a, and the door weather strip 10 is arranged along the door frame 2. Easy to paste. Further, it is lighter than the metal strip-like insert 17a and is preferable for reducing the weight of the door weather strip 10.

In molding the door 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 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 resin tape 17 is formed by extruding the resin tape 17 in a tape shape from another extruder in the molding process of the weather strip 10. The extruded resin tape 17 is guided to the attaching portion of the weather strip 10 in a hot state after vulcanization and foaming, and the resin tape 17 and the weather strip 10 are firmly fused. In addition, the resin tape 17 previously formed in a tape shape may be wound around a reel or the like and attached to the weather strip 10 using the resin tape 17.

  Next, the molding part is molded by cutting the extruded member produced as described above into predetermined dimensions, and sandwiching the end of the cut extruded part in a mold for molding the molding part. Sponge rubber material or solid material that forms the molding part is injected into the cavity of the mold. The cross-sectional shape of the molded part is substantially the same as the cross-sectional shape of the extruded part. It is preferable to use the same type of molding material as that used for the extruded part. In the case of synthetic rubber, the mold is poured into a mold, and then the mold is heated to vulcanize and foam. At this time, since the extrusion molding part and the molding part can be vulcanized and bonded using the same material or the same kind of material, they are integrally fixed. In the case of a thermoplastic elastomer or a soft synthetic resin, since the injected material is melted when injected into the mold, the extruded part and the molded part are integrally fused by the heat and pressure.

Although the embodiment of the present invention has been described by taking a door weather strip as an example, the present invention can also be used for a weather strip that is attached to the periphery of a vehicle body opening with a double-sided adhesive tape.
In this case, since the weather strip is attached to the periphery of the vehicle body opening with a double-sided adhesive tape, when the attachment base is attached to the periphery of the vehicle body opening, the seal portion abuts the door when the door is closed, and the door and the vehicle body opening A gap between the peripheral edges can be sealed. When a weather strip is attached to the door in the same manner, it is possible to perform double sealing with both weather strips, and the sealing performance is improved.
Since the double-sided adhesive tape for attaching to the periphery of the vehicle body opening is attached to the back surface of the attachment base, there is no need to attach a retainer to the periphery of the vehicle body opening, and the weight of the vehicle can be reduced.
As for the resin tape, in order to improve the assemblability of the weather strip, the width and thickness of the resin tape can be changed in order to control the elongation and meandering according to each weather strip.

It is a reference figure showing the shape of the door weatherstrip used for the present invention , and is a section shape along the AA line of Drawing 4 of the door glass of the portion attached to the upper part of the door frame which is an embodiment. . It is sectional drawing of the door weather strip which is embodiment of this invention. It is a reference figure which shows the shape of the resin tape used for this invention . It is a side view of a motor vehicle door. It is sectional drawing of the door frame upper part along the AA line of the conventional FIG. It is sectional drawing of the conventional door weather strip. It is sectional drawing of the other conventional door weather strip.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Door 2 Door frame 6 Car body opening periphery 10 Weather strip 11 Mounting base 14 Hollow seal part 16 Seal lip part 17 Resin tape 18 Double-sided adhesive tape

Claims (3)

In a weather strip 10 that seals between a car door 1 and a car body opening peripheral edge 6 of the car,
The weather strip 10 includes a mounting base 11 attached to one of the above motor vehicle door 1 or the vehicle body opening rim 6, in contact with the vehicle body opening rim 6 or the door 1 is mounted integrally with the mounting base 11 A seal portion that seals between the door 1 and the vehicle body opening periphery 6 , and the seal portion is a lip that seals between the front end of the door 1 and the vehicle outer periphery edge 6 of the vehicle body opening periphery 6. A seal-like seal lip portion 16 and a hollow seal portion 14 that is in contact with the vehicle body opening peripheral edge 6 on the vehicle inner side than the portion with which the seal lip portion 16 abuts.
A double-sided adhesive tape 18 for attaching the weather strip 10 to the back surface of the attachment base 11 is attached,
A resin tape 17 made of synthetic resin that is continuous in the longitudinal direction is attached to at least one outer surface of the weather strip 10 , and the resin tape 17 is near the base of the outer surface of the seal lip portion 16, The weather strip is attached to a surface that is difficult to see from outside the vehicle in the attached state of the weather strip. The weather strip according to claim 1, wherein the resin tape ( 17) has a metal strip insert (17a) embedded therein. The weather strip according to claim 1, wherein the resin tape 17 has a reinforcing thread 17 b embedded therein.

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