JPH1035374A - Weather strip with cut-off sponge, and manufacturing method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a weather strip with cut-off sponge which can cope with a body necessary for flange fitting. SOLUTION: This weather strip has an almost U-shaped section, and comprises plural lip parts 8, 10 for holding a flange 2 formed on an opening edge of a car body to be inserted from the side of the almost U-shaped opening 3c of the weather strip, on the inside of the almost U-shaped left and right side walls 4, 5, and the cut-off sponges 20-22 kept into contact with the flange 2 for wrapping the same, are attached to the inside of the almost U-shape. The sponges 20-22 are respectively attached to an inside of a depth wall 6, and an inside of the left and right both side walls 4, 5 of the almost U-shape, and the intervals 23, 24 are respectively formed between the sponge 20 of the inside of the depth wall 6 and that 21 of the inside of the left side wall 4, and between the sponge 20 of the inside of the depth wall 6 and the sponge 22 of the inside of the right side wall 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weatherstrip with a waterproof sponge, which is inserted into a flange formed along an opening edge of a door or a trunk room of an automobile body, and a method of manufacturing the same.

[0002]

2. Description of the Related Art As shown in FIGS. 7 and 8, a flange 2 is formed at an opening edge of a back door 1 of an automobile, and a hollow seal portion 3a which elastically contacts the back door 1 when the door is closed is integrated with the flange 2. A molded weatherstrip 3 is attached. Mounting base 3b of weatherstrip 3
Has a substantially U-shaped cross section, and is inserted into the front end 2a of the flange 2 from the substantially U-shaped opening 3c side. A plurality of lip portions 7 to 10 for holding the flange 2 are formed inside the substantially U-shaped left and right side walls 4 and 5. The lip portions 7 to 10 extend from the side walls 4 and 5 so as to be inclined toward the substantially U-shaped back wall 6, and an auxiliary lip portion 11 is formed outside the side wall 4. On the inner side of the substantially U-shaped back wall 6, as shown in FIG.
The sealant 12 that wraps around the tip 2a in contact with a is filled to prevent the flange 2 from rusting and preventing water from passing through.
A core 13 for reinforcement is embedded in the mounting base 3b.

[0003] However, those filled with the sealant 12 are vulnerable to changes in heat and cold and cannot be regenerated. In addition, there is a problem that the amount of the sealant 12 wrapping around the front end 2a of the flange 2 varies due to the difference in spread even if the filling amount of the sealant 12 is fixed. Therefore, as shown in FIG. 10, as an alternative to the sealant 12, there is known a weatherstrip 3 in which a sponge (water-stop sponge) 14 for stopping water, such as a low-modulus sponge, is attached inside the back wall 6. According to this, the problem of the sealant 12 described above is solved.

However, the waterproof sponge 14 is provided inside the back wall 6.
In the weatherstrip 3 to which the sealant 12 is attached, the deformation amount of the waterproof sponge 14 is smaller than that of the sealant 12, so that the tip 2a of the flange 2 is insufficiently wrapped. For this reason, as shown in FIG. 11, when two or three flanges 2 (2A, 2B) are combined, if there is a step m in the horizontal direction (width direction) or a step n in the vertical direction, the entire flange 2 will be removed. It may not be possible to seal completely, and as a result, it may not be possible to prevent rust prevention and water W.
Therefore, it can be adopted only for a body that is integrally molded and has no flange alignment. Therefore, as shown in FIG. 12, there is a weather strip 3 in which the shape of the waterproof sponge 15 is extended from the inside of the back wall 6 to the inside of the left and right side walls 4 and 5 so as to be able to cope with a flange-fitted body.

[0005]

However, FIG.
Weather strip 3 having waterproof sponge 15 shown in FIG.
Has manufacturing problems.

That is, if the weather strip 3 has a substantially mountain-shaped sponge 14 attached to the inside of the back wall 6 as shown in FIG. 10, the extrusion is performed in a flat state as shown in FIG. After putting it out, sponge 14
In this method, the tip 16a of the bender frame 16 was simply bent inward so as to sandwich it, so that the cross section was substantially U-shaped. However, a similar method was used to change the shape of the waterproof sponge 15 shown in FIG. When applied to the weatherstrip 3 extended to the inside of the side walls 4 and 5, respectively, the tip 16a of the bender frame 16 is sponge 1 as shown in FIG.
Since the sponge 15 enters the sponge 15 instead of being located between the sponges 5, the sponge 15 may be compressed and broken.

[0007] Further, when bent in this state to form a substantially U-shaped cross section, as shown in FIG. 15, the R portions of both shoulders of the mounting base 3 b cannot be secured uniformly, and stress is applied to the bent portion of the sponge 15. However, there is a problem of lack of flexibility due to concentration.
For this reason, a so-called pre-bender method of bending simultaneously with extrusion as shown in FIG.

Accordingly, an object of the present invention is to provide a weatherstrip with a waterproof sponge which can be applied to a body having a flange, and to easily bend a flat extruded product without particularly increasing the cost. It is an object of the present invention to provide a method for manufacturing a weatherstrip with a waterproof sponge.

[0009]

In order to achieve the above object, a weatherstrip with a waterproof sponge according to the present invention is provided.
A plurality of lip portions (8, 10) having a substantially U-shaped cross section and holding a flange (2) formed at the opening edge of the vehicle body of the automobile inserted from the substantially U-shaped opening (3c) side are substantially U-shaped. Water sponges (20, 21, 22) are formed inside the left and right side walls (4, 5) and are substantially U-shaped and are in contact with the flange (2) to enclose the flange (2). In weather strip with waterproof sponge,
The sponge (20, 21, 22) is replaced by a substantially U-shaped inner wall (6).
The sponge is attached to the inside and the left and right side walls (4, 5), respectively, and between the sponge (20) inside the back wall (6) and the sponge (21) inside the left side wall (4) and the back wall (6).
Gap portions (23, 24) are provided between the inner sponge (20) and the sponge (22) inside the right side wall (5), respectively (claim 1).

The weatherstrip with a waterproof sponge of the present invention has a substantially U-shaped cross section, and a flange (2) formed at the opening edge of the vehicle body of an automobile inserted from the substantially U-shaped opening (3c) side. Lip parts (8, 1
0) are formed inside the left and right side walls (4, 5) of the substantially U-shape, and are in contact with the flange (2) inside the substantially U-shape to wrap the watertight sponge (20, 21,).
In the weatherstrip with a waterproof sponge to which the sponge (22) is attached, the sponge (20, 21, 22) is attached to one side (4, 5) of the inside of the substantially U-shaped back wall (6) and the left and right side walls (4, 5).
Or 5), and a gap (2) is provided between the sponge (20) inside the back wall (6) and the sponge (21 or 22) inside the left or right side wall (4 or 5).
3 or 24) is provided (claim 2).

Furthermore, in the weatherstrip with a waterproof sponge according to the first or second aspect, the sponge (21) provided inside the side wall (4) is formed with a convex portion (21a), and the flange (2). It is preferable to hold the flange (2) together with the plurality of lips (8, 10) in contact with the lip (8).

A method for manufacturing a weatherstrip with a waterproof sponge is described in the following. A method of manufacturing a weatherstrip with a waterproof sponge, wherein a flange (2) formed on an opening edge of a vehicle body of an automobile inserted from the substantially U-shaped opening (3c) side. Lip parts (8, 1
0) are formed inside the left and right side walls (4, 5) of the substantially U-shape, and are in contact with the flange (2) inside the substantially U-shape to wrap the watertight sponge (20, 21,).
22). A method of manufacturing a weatherstrip with a waterproof sponge to which a sponge (20, 21, 22) is attached.
2) The U-shaped back wall (6) inside and the left and right side walls (4, 4)
5) Inside, between the sponge (20) inside the back wall (6) and the sponge (21) inside the left side wall (4) and the back wall (6).
In a state where gaps (23, 24) are provided between the sponge (20) on the inner side and the sponge (22) on the inner side of the right side wall (5), flat extrusion is performed in a substantially linear cross section, and then provided. A bending member (16) is inserted into the two gaps (23, 24) and bent inward to form a substantially U-shaped cross section (claim 4).

According to the first aspect of the present invention, the water stopping sponge surrounding the flange is attached to the inside of the substantially U-shaped back wall and the inside of the left and right side walls, respectively. Even if this occurs, the wrapping condition of the flange does not become insufficient, and the generation of rust and sink water at the tip of the flange due to insufficient sealing is prevented. Further, since a gap is provided between the sponge inside the back wall and the sponge inside the left wall and between the sponge inside the back wall and the sponge inside the right wall, for example, bending such as a bender frame The member can be inserted into the gap to form an angle freely, and at this time, there is no problem such as breaking the waterproof sponge due to the contact of the bending member.

According to the second aspect of the present invention, the sponge is attached to the inside of the substantially U-shaped back wall and to one of the left and right side walls, respectively, so that the sponge inside the back wall and the sponge inside the left or right side wall are connected. 2. The method according to claim 1, wherein only the gap is provided.
The same operation and effect as the invention described in (1) are obtained.

According to the third aspect of the present invention, a projection is formed on the sponge provided inside the side wall, and the flange is held in contact with the flange together with the plurality of lip portions. The triangle gap generated by the stepped portion of the flange can be filled, and the sealing performance is further improved.

According to a fourth aspect of the present invention, there is provided a method for manufacturing a weatherstrip with a waterproof sponge to which a waterproof sponge surrounding a flange is attached. Flat extrusion with a substantially straight cross section, with gaps provided between the sponge inside the back wall and the sponge inside the left side wall and between the sponge inside the back wall and the sponge inside the right side wall, respectively. After molding,
Since it is only necessary to insert a bending member into the two gaps provided and simply bend inward to make a substantially U-shaped cross section,
Easy to manufacture. In particular, since the gap is provided in advance, the sponge is not compressed and broken by the insertion of the bending member. In addition, there is no lack of flexibility due to heat being absorbed in the corner of the sponge.

[0017]

Embodiments of the present invention will be described with reference to the drawings. The same parts as those in the conventional example are denoted by the same reference numerals, and description thereof will be omitted. As shown in FIG. 1, a weatherstrip with a waterproof sponge according to an embodiment of the present invention has a cross section composed of left and right side walls 4, 5 and a back wall 6, similarly to the weatherstrip 3 shown in FIG. 10 as a conventional example. It is substantially U-shaped and has lip portions 8, 1 inside the side walls 4, 5.
0 is formed, and an auxiliary lip portion 11 is formed outside the side wall 4.

Then, the inner side of the back wall 6, the left and right side walls 4, 5
On the inside, sponges 20, 21, 22 for stopping water, such as a low-modulus sponge that surrounds the flange 2 in contact with the flange 2 formed on the opening edge of the door of the automobile, are attached. As a result, even if the two flanges 2A and 2B are brought together as shown in FIG. 1 to form a stepped portion, the wrapping condition does not become insufficient, and rust or rust may be formed on the tip 2a of the flange 2 due to insufficient sealing. Generation of underwater is prevented. Further, between the sponge 20 inside the back wall 6 and the sponge 21 inside the left side wall 4 and between the sponge 20 inside the back wall 6 and the sponge 22 inside the right side wall 5, as will be described later, a waterproof sponge is provided. In order to simplify the method of manufacturing the weatherstrip, gaps 23 and 24 are provided, respectively.

Next, a description will be given of a method of manufacturing the weatherstrip with a waterproof sponge according to this embodiment. First, as shown in FIG. 2, the weatherstrip is extruded in a substantially straight cross section and flat. At this time, the water stopping sponges 20, 21,
22 is extruded simultaneously with the gaps 23 and 24 provided. Thereafter, as shown in FIG.
Bender frame 16 which is a bending member is provided in two gaps 23 and 24.
When the front end 16a is inserted and bent inward, a weather strip having a substantially U-shaped cross section is obtained, as shown in FIG. Since the tip 16a of the bender frame 16 is inserted into the gaps 23 and 24 provided in advance as described above, the water stop sponges 20 to 22 are not broken by the insertion, and stress concentrates on the corners. There is no problem of lack of flexibility.

In this embodiment, the water stopping sponge 2 is used.
0 to 22 were attached to the inside of the back wall 6 and the inside of the left and right side walls 4 and 5 by simultaneous extrusion molding. Thus, a gap 23 or 24 may be provided between the sponge 20 inside the back wall 6 and the sponge 21 or 22 inside the left or right wall. Further, as shown in FIG. 4, a sponge 2 provided inside the left side wall 4 (or the right side wall 5).
1, a convex portion 21a may be formed, and this may be in contact with the flange 2 instead of the lip portion 9 to hold the flange 2 together with the other plurality of lip portions 7, 8, and 10. According to this, the triangular gap 30 generated by the stepped portion between the flange 2A and the flange 2B fitted as shown in the cross section shown in FIG. 5 can be filled, and the sealing performance is improved.

In the present embodiment, the gaps 23 and 24 are so large that the tip 16a of the bender frame 16 can be inserted. However, the gaps 23 may be made larger as shown in FIG. .

In the embodiment of the present invention, the weather strip with the waterproof sponge inserted into the flange formed along the opening edge of the back door of the vehicle body of the automobile has been described. The same configuration can be applied to a weatherstrip with a waterproof sponge to be inserted into the formed flange. Also attached to the back door opening edge or trunk lid opening edge, etc., as well as a weather strip where a hollow seal portion is set on the back wall, attached to the side door opening edge or quarter window opening edge of the car body of the car, The same configuration can be applied to a weather strip in which a hollow seal portion is set on the left side wall or the right side wall.

[0023]

As described above, according to the first and second aspects of the present invention, even if, for example, two flanges are brought together and a stepped portion is formed, the wrapping of the flanges is not insufficient, but is insufficient. Prevention of generation of rust and piercing water at the tip of the flange due to a proper seal. Also,
With the gap provided in advance, for example, a bending member such as a bender frame can be inserted into the gap to freely give an angle, and at this time, the failure of breaking the water sponge due to the contact of the bending member Does not occur.

According to the third aspect of the present invention, the sponge provided inside the side wall is formed with a convex portion, and the sponge is in contact with the flange to hold the flange together with the plurality of lip portions. The triangle gap generated by the stepped portion of the flange can be filled, and the sealing performance is further improved.

According to a fourth aspect of the present invention, a method of manufacturing a weatherstrip with a waterproof sponge is characterized in that the sponge is provided on the inner side of the substantially U-shaped inner wall and on the inner side of the left and right side walls. After flat extrusion molding with a substantially straight section in a state in which gaps are provided between the inner sponge and the sponge on the inner side of the back wall and the sponge on the inner side of the right side wall, respectively,
Since it is only necessary to insert a bending member into the two gaps provided and simply bend inward to make a substantially U-shaped cross section,
Easy to manufacture. In particular, since the gap is provided in advance, the sponge is not compressed and broken by the insertion of the bending member. In addition, there is no lack of flexibility due to heat being absorbed in the corner of the sponge.

[Brief description of the drawings]

FIG. 1 is an enlarged cross-sectional view showing a weatherstrip with a waterproof sponge according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view showing a process of manufacturing the weatherstrip with a waterproof sponge shown in FIG. 1 and showing a state of flat extrusion molding.

FIG. 3 is an enlarged cross-sectional view showing a process of manufacturing the weatherstrip with a waterproof sponge shown in FIG. 1 and showing a state where the state shown in FIG. 2 is bent.

FIG. 4 is an enlarged sectional view showing a weatherstrip with a waterproof sponge according to another embodiment of the present invention.

FIG. 5 is a cross-sectional view showing a state in which the weatherstrip with a waterproof sponge shown in FIG.

FIG. 6 is an enlarged sectional view showing a weatherstrip with a waterproof sponge according to another embodiment of the present invention.

FIG. 7 is an external perspective view showing the vicinity of a back door of an automobile.

FIG. 8 is an enlarged sectional view taken along line AA of FIG. 7;

FIG. 9 is an enlarged cross-sectional view showing a weather strip in which a sealant is inserted according to a conventional example.

FIG. 10 is an enlarged sectional view showing another weatherstrip with a waterproofing sponge according to a conventional example.

FIG. 11 is a perspective view showing a state in which the weather strip with a waterproof sponge shown in FIG. 10 wraps the mating flange 2 (2A, 2B).

FIG. 12 is an enlarged sectional view showing another weatherstrip with a waterproof sponge according to a conventional example.

FIG. 13 is an enlarged cross-sectional view showing a process of manufacturing the weatherstrip with a waterproof sponge shown in FIG. 10;

FIG. 14 is an enlarged cross-sectional view showing a process of manufacturing the weatherstrip with a waterproof sponge shown in FIG. 12.

FIG. 15 is an enlarged cross-sectional view illustrating a process of manufacturing the weatherstrip with a waterproof sponge illustrated in FIG. 12, and illustrating a state where the weatherstrip is bent from the state illustrated in FIG. 14;

FIG. 16 is a perspective view showing a manufacturing process of another weatherstrip with a waterproof sponge.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Backdoor 2 (2A, 2B) Flange 2a Flange tip 3 Weatherstrip with waterproof sponge 3a Hollow seal part 3b Mounting base 3c Opening 4 Left side wall 5 Right side wall 6 Back wall 7, 8, 9, 10 Lip part 11 Auxiliary Lip part 12 Sealant 13 Core material 14, 15 Water stopping sponge 16 Bender top 16a Tip 20, 21, 22 Water stopping sponge 21a Convex part 23, 24 Gap part 30 Triangular cut

Claims (4)

[Claims] A plurality of lip portions having a substantially U-shaped cross section and holding a flange formed on an opening edge of a vehicle body of an automobile to be inserted from the substantially U-shaped opening side are provided inside left and right side walls of the substantially U-shape. In a weatherstrip with a waterproof sponge, which is formed and has a waterproof sponge inside which is in contact with the flange and encloses the flange in contact with the flange, the sponge is formed by attaching the sponge to the inner side of the substantially U-shaped inner wall and to the left and right side walls. A water-stop sponge, wherein the sponge is attached to the inside and a gap is provided between the sponge inside the back wall and the sponge inside the left wall and between the sponge inside the back wall and the sponge inside the right wall. With weather strip. 2. A plurality of lip portions having a substantially U-shaped cross section and holding a flange formed at an opening edge of a vehicle body of an automobile inserted from the substantially U-shaped opening side are provided on the inner sides of the left and right side walls of the substantially U-shape. In a weatherstrip with a waterproof sponge, which is formed and has a waterproof sponge that wraps around the flange in contact with the flange inside the substantially U-shape, the sponge is attached to the inner side of the substantially U-shaped inner wall and to the left and right side walls. A weather strip with a waterproof sponge, wherein the weather strip is provided with a gap between the sponge on the inner side of the back wall and the sponge on the inner side of the left or right side wall. 3. A sponge provided inside the side wall has a convex portion, and the sponge contacts the flange to hold the flange together with the plurality of lip portions.
Or the weatherstrip with a waterproof sponge according to claim 2. 4. A plurality of lip portions, each having a substantially U-shaped cross section and holding a flange formed at an opening edge of a vehicle body of an automobile inserted from the substantially U-shaped opening side, are formed inside the left and right side walls of the substantially U-shape. A method of manufacturing a weatherstrip with a waterproof sponge, wherein a sponge for waterproofing is formed inside and in contact with the flange so as to wrap the flange inside the substantially U-shape. On the left and right side walls, between the sponge on the inner side of the inner wall and the sponge on the inner side of the left wall, and between the sponge on the inner side of the inner wall and the sponge on the inner side of the right side wall, respectively, with a substantially straight cross section, A method for producing a weatherstrip with a waterproof sponge, comprising: flat-extrusion molding; inserting a bending member into two provided gaps and bending the inside into a substantially U-shaped cross section.