JP2002274285A - Weather strip and its fitting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a weather strip and its fitting structure capable of reducing the weight and keeping stable fitting state and sealing. SOLUTION: This weather strip 4 is fitted extending over the whole periphery including at least a corner part of a door opening peripheral edge of a door for an automobile and basically formed by extrusion molding. The weather strip is provided with a trim part 5 held on a flange 8 of the body and a sealing part 7. At least a part of the trim part 5 is fitted to the flange 8 through a pressure sensitive adhesive double coated tape 17, and at least a part held on the flange 8 of the trim part 5 is formed of EPDM fine foam rubber. Therefore, even if an insert is not provided in the trim part 5, the fitting state can be surely kept. Further, the weight is reduced both by dispensing with the insert and forming at least the part held on the flange 8 of the trim part 5 by EPDM fine foam rubber.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weather strip to be mounted along a peripheral edge of a door opening of a vehicle and a mounting structure therefor.

[0002]

2. Description of the Related Art Generally, a weather strip is provided around a door opening of a vehicle such as an automobile. The weatherstrip includes a trim portion held by a flange at a peripheral edge of the door opening, and a hollow seal portion provided to protrude from one side wall of the trim portion. The trim portion has a substantially U-shaped cross section, and a metal insert is embedded therein. When installing the weather strip,
The trim portion is fitted into the flange, and the attachment state is basically maintained by the binding force of the insert.

When the door is closed, the edge of the door comes into contact with the seal portion, and the seal portion is crushed and deformed, thereby sealing between the door and the body. Some of the weather strips are attached to a portion corresponding to an upper portion or a side portion of the door, and others are attached to the entire periphery of the door opening. Of these, the substantially linear portion corresponding to the door upper portion and the side portion is formed by a so-called extrusion method, and the corner portion where the substantially linear portion intersects may not be able to follow the curved deformation of the seal portion etc., Generally, it is formed by a molding method (see Japanese Patent Application Laid-Open No. 5-139217).

[0004] In recent years, there has been an increasing need for weight reduction of weather strips. In order to meet such needs, it is conceivable to omit the insert in the trim.

[0005]

However, it is not possible to sufficiently maintain the state of attachment of the weatherstrip simply by not providing the insert in the trim. In particular, when the entire weatherstrip is formed by the extrusion molding method, although the number of steps required for the molding is reduced, a remarkable strain stress is generated at a corner portion. For this reason, the shape of the corner portion cannot properly follow the shape of the flange due to the strain stress, and “floating” occurs in the portion, making it more difficult to maintain an accurate mounting state. Furthermore, there is a demand for further weight reduction.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to significantly reduce the weight and to maintain a stable mounting state and a seal. An object of the present invention is to provide a weather strip and a mounting structure thereof.

[0007]

Means for Solving the Problems and Effects of the Invention Each means suitable for solving the above-mentioned objects and the like will be described separately. In addition, a function and effect specific to the corresponding means will be added as necessary.

Means 1. A weather strip attached along a peripheral edge of a door opening of a vehicle, the insert strip being provided on a flange of the peripheral edge of the door opening, and being provided so as to protrude from one side wall of the trim part. And a hollow seal portion against which the periphery of the trim portion is pressed, at least a part of the trim portion is configured to be attached to the flange via an adhesive layer, and is held by at least the flange of the trim portion. The weatherstrip is characterized in that the portion is made of fine foam rubber or a material having fine foam rubber elasticity.

According to Means 1, the weatherstrip is
At the trim portion, it is held by a flange around the door opening. When the door is closed, a hollow sealing portion provided so as to protrude from one side wall of the trim portion is pressed by a peripheral edge of the door to achieve sealing. By the way, in this means, at least a part of the trim part is attached to the flange via the adhesive layer, and at least a part of the trim part held by the flange has fine foam rubber or rubber elasticity of fine foam. It is constituted by the material which has. For this reason, even if there is no insert in a trim part, an attachment state is maintained reliably. In addition, the absence of the insert in the trim portion, and the fact that at least the portion of the trim portion held by the flange is made of a material having fine foam rubber or fine foam rubber elasticity,
A drastic reduction in weight, which has not been achieved in the past, will be achieved. Further, when the adhesive layer is provided entirely in the longitudinal direction of the weather strip, the inside and the outside are shut off from the adhesive layer as a boundary. For this reason, foreign substances such as water and dust, sound, and the like hardly leak. As a result, the sealant, etc., which was required in the past, becomes unnecessary, and the mounting state is maintained with a simple configuration.
In addition, a reliable seal can be obtained. In this case, the feature is that the adhesive layer is provided over the entire length in the longitudinal direction (the same applies to each means hereinafter).

Means 2. 2. The weather strip according to claim 1, wherein the seal portion is made of sponge rubber or a sponge-like material having rubber elasticity.

According to the means 2, since the seal portion is made of sponge rubber or a sponge-like material having rubber elasticity, the seal portion is liable to be deformed at the time of sealing, and the weight is further reduced.

Means 3. A weather strip attached along the periphery of a door opening of a vehicle, wherein the weather strip is substantially U-shaped or substantially J-shaped so as to be held by a flange at the periphery of the door opening.
It is made of sponge rubber or a sponge-like material having rubber elasticity, and is provided so as to protrude from the base and has a door closing shape. And a hollow sealing portion against which the periphery of the door is sometimes pressed, at least a part of the trim portion is configured to be attached to the flange via an adhesive layer, and at least the flange of the trim portion is A weather strip, wherein a portion to be held is made of fine foam rubber or a material having fine foam rubber elasticity.

According to the third measure, the weather strip is
A trim portion having a substantially U-shaped cross section or a substantially J-shaped cross section is held by a flange around the door opening. When the door is closed, a hollow sealing portion provided so as to protrude from the base of one side wall of the trim portion is pressed by the peripheral edge of the door to achieve sealing. By the way, in this means, at least a part of the trim portion is attached to the flange via the adhesive layer, and at least a portion of the trim portion held by the flange has fine foam rubber or rubber elasticity of fine foam. It is constituted by the material which has. For this reason, even if there is no insert in a trim part, an attachment state is maintained reliably.
Further, the trim portion has no insert, and at least a portion of the trim portion held by the flange is made of fine foam rubber or a material having fine foam rubber elasticity, and the seal portion is made of sponge rubber. Alternatively, combined with the sponge-like material having rubber elasticity, a drastic reduction in weight, which has not been achieved in the past, can be achieved.

Means 4. The weatherstrip according to any one of means 1 to 3, wherein the adhesive layer is made of a double-sided adhesive tape having a predetermined thickness.

According to the means 4, at least a part of the trim portion is attached to the flange via the double-sided adhesive tape having a predetermined thickness. For this reason, attachment work can be performed relatively easily.

Means 5 The weatherstrip according to any one of means 1 to 4, wherein the weatherstrip is formed by extrusion molding in a longitudinal direction.

According to the means 5, since all of the weather strips are formed by extrusion in the longitudinal direction, there is no need to perform separate molding, and as a result, molding is significantly simplified.

Means 6 Formed by extrusion,
A weather strip mounting structure mounted along a peripheral edge of a door opening of a vehicle, wherein the weather strip has an insertless trim portion held on a flange of the peripheral edge of the door opening, and sponge rubber or sponge-like rubber elasticity. And a hollow seal portion which is integrally formed so as to protrude from the trim portion and is pressed against a peripheral edge of the door when the door is closed,
At least a portion of the trim portion is configured to be attached to the flange via a double-sided adhesive tape, and at least a portion of the trim portion substantially held by the flange is substantially U-shaped.
A mounting structure for a weather strip, characterized in that the character-shaped portion is made of fine foam rubber or a material having rubber elasticity of fine foam.

According to the means (6), at least a part of the trim portion is attached to the flange via the adhesive layer, and at least a portion of the trim portion having a substantially U-shaped cross section held by the flange is formed. It is made of fine foam rubber or a material having fine foam rubber elasticity. For this reason, even if there is no insert in a trim part, an attachment state is maintained reliably. Further, the trim portion has no insert, and at least a portion of the trim portion held by the flange is made of fine foamed rubber or a material having rubber elasticity of fine foam, and the seal portion is made of sponge rubber. Alternatively, combined with the sponge-like material having rubber elasticity, a drastic reduction in weight, which has not been achieved in the past, can be achieved.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment will be described below with reference to the drawings.

As shown in FIGS. 1 to 3, a weather strip 4 is provided on the periphery of the door opening 3 on the body side corresponding to the door 2 of the automobile 1. The weather strip 4 of the present embodiment is attached over the entire periphery of the door opening 3 and is basically formed by an extrusion method.

The weather strip 4 has a trim part 5 and a seal part 7. The trim portion 5 includes a pair of side walls 1.
A connecting portion 13 having a curved cross section for connecting the side walls 1 and 12 and the side walls 11 and 12 has a substantially U-shaped (or substantially J-shaped) shape as a whole, and a flange located at a peripheral edge of the door opening 3. The tip of 8 is held so as to be inserted into the recess.

The trim portion 5 of the present embodiment is made of EPDM (ethylene-propylene-diene copolymer) which is a finely foamed rubber.
It is made of fine foam rubber (specific gravity 0.9 to 1.0). In addition, the insert that has been conventionally buried inside is not provided in the trim portion 5 of the present embodiment (insertless). Further, one side wall 11 of the trim portion 5 has a base 6. The base 6 is integrally formed with a protrusion 14 protruding inward, so that the holding force on the flange 8 is increased.

The base 6 is integrally provided so as to extend from one side wall 11 of the trim portion 5. Base 6
Is formed with a recess 16 corresponding to a weld bead 15 for joining the flanges 8 of the body panel to each other.

Further, a seal portion 7 is provided for the base portion 6 and has a hollow shape. The seal portion 7
It is composed of EPDM (ethylene-propylene-diene copolymer) sponge rubber (specific gravity 0.5 to 0.7). When the door 2 is closed, as shown in FIG. 4, the seal portion 7 is crushed and deformed, so that the space between the door 2 and the body of the automobile 1 is sealed.

In the present embodiment, one surface of a double-sided adhesive tape 17 as an adhesive layer is attached to a portion of the base 6 that is closer to the tip (upper side in the figure) than the recess 16. The other surface of the double-sided adhesive tape 17 is attached to the flange 8. That is, at least a part of the base 6 is attached to the flange 8 via the double-sided adhesive tape 17. Further, a portion of the base portion 6 corresponding to the double-sided adhesive tape 17 is made of the same material as the seal portion 7, that is, EPD.
It is composed of M sponge rubber. The double-sided adhesive tape 17 has a predetermined thickness, and is made of a material having a higher foaming material than the material of the seal portion 7. Further, the double-sided adhesive tape 17 is attached over the entire circumference of the weather strip 4 in the longitudinal direction.

Next, the operation and effect of the weather strip 4 configured as described above and the mounting structure thereof will be described.

The weather strip 4 in the present embodiment is basically formed entirely by an extrusion method including at least a corner portion. When the weather strip 4 is formed into an annular shape, the molding connection may be performed in some cases. Therefore, the number of steps for molding can be reduced, and as a result, molding can be simplified.

Further, in the present embodiment, the trim portion 5 held by the flange 8 is not provided with an insert, and is made of only a rubber material. In particular, at least a portion of the trim portion 5 held by the flange 8 is E
It is made of PDM fine foamed solid rubber.
Together, these factors can significantly reduce the weight. In addition, in terms of weight reduction, the trim part 5 is replaced with the seal part 7.
Similarly, if the sponge rubber is made of EPDM, the weight can be further reduced, but the holding force to the flange 8 cannot be obtained, and the weather strip 4 cannot be stably mounted.

Further, in the present embodiment, at least a part of the base 6 is
Therefore, the attached state can be reliably maintained without providing the trim portion 5 with an insert.
Moreover, the portion of the base 6 corresponding to the double-sided adhesive tape 17 is made of the same material as the seal portion 7, that is, EPDM sponge rubber. For this reason, at the part corresponding to the corner of the body when attached to the body,
Because the part composed of the sponge rubber easily extends,
It can easily follow a curved shape and be deformed. With this,
The stress at the time of deformation is relatively small. Therefore, it is possible to prevent a problem such as "lifting" which may occur due to a large deformation stress, and to maintain a more stable mounting state in this sense.

Further, in the present embodiment, the double-sided adhesive tape 17 is applied over the entire circumference of the weather strip 4 in the longitudinal direction.
Is provided, so that the inside and the outside are shut off with the double-sided adhesive tape 17 as a boundary. For this reason, foreign matters such as water and dust, sound, and the like hardly leak. As a result, a sealant or the like that has been required conventionally becomes unnecessary, and the attached state and the seal can be maintained with a simple configuration.

It is to be noted that the present invention is not limited to the contents described in the above embodiment, and may be carried out as follows, for example. Of course, other application examples and modifications not illustrated below are naturally possible.

(A) In the above embodiment, the weather strip 4 is mounted on the periphery of the door opening 3 corresponding to the door 2 on the side of the body, but is mounted on the opening of another door. It can also be embodied in a weatherstrip.

For example, as shown in FIG. 5, the present invention can also be embodied in a weather strip 21 attached to an opening of a back door (not shown) at the rear of the vehicle. That is, the weather strip 21 includes the trim part 22 and the seal part 23. The trim portion 22 is held by a flange 24 located at the periphery of the opening. The trim portion 22 is made of insertless EPDM fine foam rubber. Further, a hollow seal portion 23 made of EPDM sponge rubber is provided on one side wall of the trim portion 22 via a neck portion integrally formed of the same material as the trim portion 22. When the back door is closed, the seal portion 23 is crushed and deformed, so that the space between the back door and the vehicle body is sealed. A double-sided adhesive tape 25 is attached between the one side wall of the trim portion 22 and the flange 24. A lip 26 made of EPDM sponge rubber is integrally formed on the one side wall of the trim portion 22.

The weather strip 31 shown in FIG.
Are attached to the back door opening at the rear of the vehicle. The weather strip 31 also includes a trim portion 32 and a seal portion 33, as described above. In this example, a cover lip 36 that covers an end of an interior material such as garnish is integrally formed from the trim portion 32 of the weather strip 31. This cover lip 36 is also EPDM
Made of fine foam rubber.

Even if it is configured as shown in FIGS. 5 and 6,
The same operation and effect as those of the above-described embodiment can be obtained.

(B) FIG. 7 shows a modified example of the weather strip 41 attached to the opening 3 of the seat door 2 as in the above embodiment. As shown in the figure, the entire trim section 42 may be made of EPDM fine foam rubber. Further, the double-sided adhesive tape 43 may be attached to the opposite surface (between the other side wall and the flange 44). Further, the cover lip 45 may be separately formed integrally.

(C) Further, as shown in FIG. 8, the present invention can be embodied in a weather strip 51 attached to the opening of the luggage door 50 at the rear of the vehicle. That is, the weather strip 51 includes a trim portion 52 and a seal portion 53. The trim portion 52 is similarly insertless E
It is made of PDM fine foam rubber and is held by a flange 54 located at the periphery of the opening. Further, a hollow seal portion 53 made of EPDM sponge rubber is provided at a connection portion of the trim portion 52 via a neck portion integrally formed of the same material as the trim portion 52. When the luggage door 50 is closed, the seal portion 53 is crushed and deformed, so that the space between the luggage door 50 and the body of the automobile is sealed. Further, a double-sided adhesive tape 55 is attached between the one side wall of the trim portion 52 and the flange 54 (of course, a double-sided adhesive tape may be attached to both side walls). Even with such a configuration, the same operation and effect as those of the above-described embodiment can be obtained.

(D) In the above embodiment, EPDM is exemplified as a material constituting the weather strip 4, but other rubber materials such as IR (isoprene rubber) and CR (chloroprene rubber) may be used. Further, it may be made of an olefin-based thermoplastic elastomer (TPO) or another elastic material having rubber-like elasticity such as soft polyvinyl chloride.

(E) In the above embodiment, the weather strip 4 is attached to the entire periphery of the door opening 3, but the weather strip 4 does not necessarily have to be attached to the entire periphery.
For example, it may be attached to a front part and a rear part which extend in a vertical direction, and an upper part connecting them.

(F) In the above embodiment, the double-sided adhesive tape 17 is attached over the entire circumference of the weather strip 4, but it is not necessarily required to be attached over the entire circumference. It may be attached to.

(G) Further, a coating layer made of a silicone resin or the like may be applied on the surface of the seal portion 7.

(H) In the above embodiment, the double-sided adhesive tape 17 is made of a material having a higher foaming rate than EPDM sponge rubber, but it is not necessarily limited to such a material.

(I) Instead of the double-sided adhesive tape 17, the adhesive layer may be constituted by an adhesive layer.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a mounting structure of a weather strip in one embodiment.

FIG. 2 is a side view showing an automobile centering on a door.

FIG. 3 is a partial perspective view showing a weather strip mounting structure and the like.

FIG. 4 is a cross-sectional view illustrating a deformed state of the weather strip when the door is closed.

FIG. 5 is a cross-sectional view showing a weather strip mounting structure according to another embodiment.

FIG. 6 is a cross-sectional view illustrating a weather strip mounting structure according to another embodiment.

FIG. 7 is a cross-sectional view illustrating a weather strip mounting structure according to another embodiment.

FIG. 8 is a cross-sectional view showing a weather strip mounting structure according to another embodiment.

[Explanation of symbols]

1 ... car as a vehicle, 2 ... door, 3 ... door opening,
4, 21, 31, 41, 51 ... weather strip,
5, 22, 32, 42, 52 ... trim part, 6 ... base part,
7, 23, 33, 53 ... seal portion, 8, 24, 44, 5
4 ... Flange, 17,25,34,43,55 ... Double-sided adhesive tape constituting an adhesive layer.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3D201 AA03 AA12 AA28 AA40 CA03 DA08 DA18 DA23 EA04B EA04D FA04

Claims (6)

[Claims] 1. A weather strip mounted along a peripheral edge of a door opening of a vehicle, comprising: an insertless trim portion held on a flange of the peripheral edge of the door opening; and a projecting portion protruding from one side wall of the trim portion. ,
A hollow seal portion against which a peripheral edge of the door is pressed when the door is closed, wherein at least a part of the trim portion is configured to be attached to the flange via an adhesive layer, and at least the A weather strip, wherein a portion held by the flange is made of fine foam rubber or a material having fine rubber elasticity. 2. The weather strip according to claim 1, wherein the seal portion is made of sponge rubber or a sponge-like material having rubber elasticity. 3. A weather strip mounted along a peripheral edge of a door opening of a vehicle, wherein the weather strip has a substantially U-shaped cross section or a substantially J-shaped cross section so as to be held by a flange on the peripheral edge of the door opening. An insertless trim portion having a base portion, and a hollow portion formed of sponge rubber or a material having sponge-like rubber elasticity and provided so as to protrude from the base portion, and a peripheral edge of the door is pressed when the door is closed. A seal portion, wherein at least a part of the trim portion is configured to be attached to the flange via an adhesive layer, and at least a portion of the trim portion held by the flange is fine foam rubber or A weather strip made of a material having fine rubber elasticity. 4. The weather strip according to claim 1, wherein the adhesive layer is made of a double-sided adhesive tape having a predetermined thickness. 5. The weatherstrip according to claim 1, wherein the weatherstrip is formed by extrusion in the longitudinal direction. 6. A weather strip mounting structure formed by extrusion molding and mounted along a peripheral edge of a door opening of a vehicle, wherein the weather strip is an insertless trim held on a flange at a peripheral edge of the door opening. And a hollow seal portion which is formed of sponge rubber or a sponge-like material having rubber elasticity, is integrally provided so as to protrude from the trim portion, and presses the peripheral edge of the door when the door is closed. At least a part of the trim portion is configured to be attached to the flange via a double-sided adhesive tape, and at least a portion of the trim portion having a substantially U-shaped cross section held by the flange is provided. A weather strip, which is made of foamed rubber or a material having rubber elasticity of fine foam. Structure.