JP2003136968A - Weather strip for car - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a weather strip for a car to be installed consecutively at the door opening edge of the car body, in which the sealing performance of strips can be made uniform over the whole length even though the door intruding direction to the strips differs locally. SOLUTION: The weather strips installed consecutively on a flange 2 provided at the door opening edge 1 have a first portion 5A and a third portion 5C to be attached to a roof side part 1A and a rear vertical edge 1C of the door opening edge 1, wherein the rising angles β1 and β3 of the first 5A and third portions 5C from the side face 511 of the mounting base 51 of a leg 522 of a hollow seal part 523 are set greater than the rising angle β2 of the second portion 5B to be attached to the front vertical edge 1B of the opening edge 1 whereto the door 3 is coupled by hinge(s), and the angles between the intruding direction of the door 3 when it is closed and the rising direction of the leg 22 of different parts of the weather strips 5 are approached to become uniform, and the deformations when seal wall 523 is pressed by the door 3 is made uniform from part to part of the weather strips 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weather strip for an automobile, and more particularly to a weather strip mounted along an opening edge of a door opening on a side surface of a vehicle body.

[0002]

2. Description of the Related Art A weather strip is attached in series along a door opening edge 1 on the side surface of a vehicle body shown in FIG. 2 to seal between the door opening edge 1 and the outer peripheral portion of the door 3. .

As shown in FIG. 3, a weather strip 5
Includes a mounting base portion 51 and a hollow seal portion 52 that bulges from one side surface of the mounting base portion 51 on the vehicle exterior side, and the mounting base portion 51 is mounted on the flange 2 formed on the door opening edge 1.

In the hollow seal portion 52, the tip ends of the leg portions 521 and 522, which project from the one side surface 511 of the mounting base portion 51 in a divergent manner to form side surface portions on both sides of the hollow seal portion 52, form a circular arc shape at the seal wall 523. It is a connected structure. The weather strip 5 is an extruded body of a rubber-like elastic material such as rubber or thermoplastic elastomer. Generally, the mounting base portion 51 and the leg portions 521 and 522 are made of a solid material, and the sealing wall 523 is made of a sponge material.

The flange 2 extends from the door opening edge 1 to the opening edge 1
It projects in the direction along the side surface of the vehicle body around it, and in the roof side portion 1A above the door opening edge 1, as shown in FIG.
Respectively, and the rocker portion 1D at the lower edge projects vertically upward. A mounting base 51 of a weather strip 5 having a substantially U-shaped cross section is fitted over the flange 2. In the drawing, 4 is a door glass.

Since the projecting direction of the flange 2 is different depending on the portion of the door opening edge 1 as described above, the door 3 with respect to the seal wall 523 of the weather strip 5 attached to the flange 2 is.
The pressing direction of the outer peripheral portion of the is different depending on the portion of the opening edge 1.

FIGS. 4A, 4B, 4C and 4D show a roof side portion 1A and a front vertical edge 1 of a door opening edge 1, respectively.
B, the rear longitudinal edge 1C, and the locker portion 1D show the approaching direction (pressing direction) of the door 3 with respect to the flange 2. The door 3 is inclined from the diagonal direction as indicated by an arrow P _A in the roof side portion 1A. 3 is hinged to the front vertical edge 1B from an oblique direction as indicated by an arrow P _B , and at the rear vertical edge 1C and the rocker portion 1D, the arrows P _C , P.
_As shown by _D , approach from almost vertical direction (approach angle α ₂
<Α ₁ <α ₃ , α ₄ ), and the difference between the approach angle α ₂ and the approach angle α ₃ is generally about 50 °.

[0008]

By the way, the mounting base 51 of the leg portion 522 on the inner peripheral side of the door opening of the weather strip 5 is provided.
If the rising angle β with respect to the side surface 511 (parallel to the flange 2) of the door 3 is set to be equal to or greater than the entrance angle α of the door 3, the leg portion 52 will be bulged against the entrance of the door, and the door closing force will increase. Not preferable.

Therefore, when a weather strip extruded with the same cross-sectional shape is attached to the door opening edge 1, the leg portion 52 is formed.
If the rising angle β of ₂ is set smaller than the approach angle α ₂ of the door 3, the roof side portion 1A and the rear vertical edge 1C of the door opening edge 1 have legs with respect to the approach directions P _A and P _{C of} the door 3. When the portion 522 is opened too much and the seal wall 523 is pushed in when the door is closed, as shown by the broken line in FIG. 3,
When the pushing amount is large, the seal wall 5 connected to the leg 522 is connected.
The end of 23 bulges from the tip of the leg 522 to the inside of the vehicle compartment. Since the bulging portion 522 'appears in the passenger compartment, it deteriorates the appearance quality of the passenger compartment.

Therefore, the present invention has been made in view of the above-mentioned problems, and in a weather strip to be mounted in series on a door opening edge of a vehicle body, a roof side portion, a front vertical edge and a rear portion of the door opening edge are provided. Even if the door entrance direction is different on the vertical edge, the above bulge does not occur when the seal wall is pressed by the door, and the deformation of the seal wall at the door opening edge is almost uniform at each part of the door opening edge. The purpose is to improve the sealing property of the weather strip and to maintain the good appearance of the passenger compartment.

[0011]

DISCLOSURE OF THE INVENTION The present invention is a weather strip that is mounted in series along a door opening edge of a vehicle side surface, and has a mounting base portion mounted to a flange of the door opening edge and a side surface of the mounting base portion. A hollow seal portion that bulges out from the side surface of the mounting base portion, and the hollow seal portion protrudes toward the outside of the vehicle in a divergent manner from the side surface of the mounting base to form a side surface on the outer peripheral side of the door opening and a side surface on the inner peripheral side of the door opening In a weather strip for an automobile, which comprises a leg portion to be formed, and a seal wall made of a sponge material that connects the tips of both leg portions in a curved shape,
A rising angle β ₁ with respect to a side surface of the attachment base of the leg portion on the inner peripheral side of the door opening in the first portion of the weather strip attached to the roof side portion of the edge of the door opening;
The rising angle β _{2 of the} leg in the second part of the weather strip attached to the front vertical edge of the door opening edge to which the door is hinged, and the rear vertical edge of the door opening edge. The rising angle β ₃ of the leg in the third portion of the weather strip is β ₃ ≧ β
₁ > β ₂ is set (Claim 1).

The rising angles β ₁ and β ₃ of the roof side portion of the door opening edge and the weather strip leg portion of the rear vertical edge are set to be larger than the rising angle β ₂ of the leg portion of the weather strip of the front vertical edge. As a result, the legs of the weather strip do not open too far in the direction of door entry at the roof side and the rear vertical edge, and it is possible to prevent the end of the seal wall from bulging toward the passenger compartment. it can. Further, by setting the rising angles β ₁ , β ₂ , and β ₃ of the legs as described above, the opening angle between the door entrance direction and the rising direction of the legs at each part of the door opening edge is made uniform. Deformation of the seal wall due to pressing is also made uniform at each part of the door opening edge,
Good sealing performance.

The leg portion is formed of a solid material or a fine foam material having higher rigidity than the sponge material of the seal wall (claim 2). This makes it possible to stabilize the waist of the hollow seal portion.

The leg portion is formed in a shape projecting from a side surface of the mounting base portion, and a tip end side thereof is bent into an L-shape and overhangs (claim 3). This increases the degree of freedom in selecting the rising angle of the leg. The rising angle β ₁ , of the leg portion forming the side surface of the hollow seal portion on the inner peripheral side of the door opening,
When β ₂ and β ₃ are 0 parallel to the side surface of the mounting base, and + (plus) on the vehicle exterior side and − (minus) on the vehicle interior side, β ₁ is 20 ° to 30 °, β ₂
Is set to 0 ° to −15 ° and β ₃ is set to 30 ° to 45 ° (claim 4). As a result, the opening angle between the door approaching direction and the rising direction of the legs becomes substantially equal at each part of the door opening edge.

The weather strip is an extruded body, and the boundary with each of the portions is formed into a cross sectional shape that gradually changes from the cross sectional shape of one portion to the cross sectional shape of the other portion. ).

In the extrusion molding of a weather strip in which the cross-sectional shape of the hollow seal part is partially different due to the difference in the rising angle of the leg part, the outer shape of the hollow seal part is formed in front of the extrusion port at the tip of the extruder. And a plurality of caps for molding the inner shape of the hollow seal part are slidably stacked and installed, and these caps are slid on each other to change the shape of the hollow part of the weather strip that is extruded. Molding is applied to mold the boundaries during extrusion.

[0017]

1 (A), 1 (B), and 1 (C) are portions of a weather strip 5 mounted along a door opening edge along a roof side portion (first portion), respectively. 5
FIG. 4A is a cross-sectional view showing a mounted state of A, a portion (second portion) 5B along the front vertical edge and a portion (third portion) 5C along the rear vertical edge.

The weather strip 5 is an extruded body of EPDM rubber, has a U-shaped cross-section having side walls 51a and 51b parallel to each other, and has a mounting base 51 from which a holding lip 512 projects from an inner facing surface, and a vehicle of the mounting base 51. It is provided with a hollow seal portion 52 that bulges from one side surface 511 that is the outer side. The hollow seal portion 52 has a shape in which the tip ends of the leg portions 521 and 522, which project from the one side surface 511 of the attachment base portion 51 in a divergent manner, are connected by a seal wall 523 in an arc shape. The seal wall 523 is made of a sponge material, and has a mounting base 5
1 and the leg portion 52 forming the side surface portion of the hollow seal portion 52
Reference numeral 1,522 denotes a solid material or a fine foam material having a rigidity higher than that of the sponge material of the seal wall 523 (foaming ratio 10 to 25).
%). The leg portion 521, which is the outer peripheral side of the door opening, that is, the outer peripheral side of the hollow seal portion 52 when the weather strip is attached, extends linearly from the side surface 511 of the attachment base portion 51 toward the outside slightly from the vertical. Inner leg 5
22 is a base end portion 52 protruding from the side surface 511 at a substantially right angle.
The tip of 2a is bent and the bridge portion 522b is extended to have a substantially L-shaped cross section.

As shown in FIG. 1 (A), the first portion 5 of the weather strip 5 on the roof side portion 1A at the edge of the door opening.
In A, the mounting base side surface 511 of the door 3 when the door is closed
The approach angle α ₁ of the outer peripheral portion of the door 3 with respect to (almost parallel to the flange 2) is approximately 65 °. On the other hand, the rising angle β ₁ of the bridge portion 522b of the leg portion 522 from the attachment base side surface 511 is set in the range of 20 ° to 30 °, and is set to 25 ° in this embodiment.

As shown in FIG. 1B, in the second portion 5B of the weather strip of the front vertical edge 1B of the door opening edge, the entry angle α ₂ of the outer peripheral portion of the door 3 is approximately 35 °, The bridge portion 522b of the leg portion 522 is further on the side surface 511 side than the parallel to the attachment base side surface 511, that is, the vehicle inner side (-side).
And the rising angle β _{2 with} respect to the side surface 511 is 0 ° to
It is set in the range of −15 °, and is set to −15 ° in this embodiment.

As shown in FIG. 1C, in the third portion 5C of the weather strip of the rear longitudinal edge 1C of the door opening edge,
And the entry angle alpha ₃ of the outer peripheral portion of the door 3 is substantially 90 °, the rise angle beta ₃ from the bridge portion 522b of the mounting base side 511 of the legs 522 is set in a range of 30 ° to 45 °, this embodiment Is set to 40 °.

Although not shown, the cross-sectional shape of the hollow seal portion 52 of the fourth portion of the weather strip 5 of the rocker portion 1D of the door opening edge 1 is substantially the same as that of the third portion 5C of the weather strip 5. From the attachment base side surface 511 of the bridge portion 522b of the leg portion 522, while the entrance angle α ₄ of the door 3 with respect to the fourth portion attached to the vertically rising flange is approximately 90 °. Rise angle β of
₄ is set to 40 °.

As described above, the bridge portion 522 of the leg portion 522 of the hollow seal portion 52 is formed in each portion of the weather strip 5.
In the weather strip 5 in which the rising angle from the mounting base side surface 511 of b is changed, the rising angle of the bridge portion 522b of each part is set to be smaller than the entrance angle of the door when the door is closed. Against the legs 52
2 does not become a bracing and the door closing force does not increase.

By setting β ₁ , β ₂ , and β ₃ as described above, the door 3 in each part of the weather strip 5 is
Difference between the approach angle and the rising angle of the bridge portion 522b,
That is, the opening angle between the entrance direction of the door 3 and the projecting direction of the bridge portion 522b is 35 ° to 4 ° in the first portion 5A.
5 °, 35 ° to 50 ° in the second portion 5B, 45 ° to 60 ° in the third portion 5C and the fourth portion 5D, respectively, and the opening angle in the present embodiment is 40 in the first portion 5A. Is set to 50 ° in the second and third portions 5B and 5C, and when the seal wall 523 is pushed in by the door 3, the seal wall 523 is attached to the tip of the bridge portion 522b.
Does not bulge toward the passenger compartment. Further, since the opening angle of each part is made uniform, the deformation of the seal wall 523 of each part when the seal wall 523 is pressed by the door 3 is made uniform, and uniform and good sealing property is achieved over the entire length of the weather strip 5. can get.

The weather strip 5 in which the rising angle of the bridge portion 522b with respect to the mounting base side surface 511 changes depending on each portion can be manufactured by the variable extrusion molding. In this case, the cross-sectional shape of the seal portion is gradually changed from one portion to another portion at the boundary portion where one portion moves to another portion in a series of extrusion molding steps.

In the above embodiment, the rising angles of the bridge portions 522b of the first, second, third portions 5A, 5B, 5C and the fourth portion of the weather strip 5 are changed, but the second portion is changed. The rising angles of other portions except 5B may be the same as those of the first portion 5A. This facilitates variable extrusion operations.

Further, the structure of the rocker portion 1D of the door opening edge 1 may be considerably different from the other opening edge portions,
In this case, the form of the bridge portion 522b of the fourth portion 5D of the weather strip is not limited to the first portion 5A or the third portion 5C.

Further, in the above embodiment, the leg portion 522 is formed in a substantially L shape by the base end portion 522a and the bridge portion 522b, but in the present invention, the leg portion 522 is formed in a straight line shape as shown in FIG. It can also be applied to weather strips.

In the above embodiment, one side surface 511 of the mounting base 5 with the weather strip 5 attached.
Has been described as being parallel to the flange 2, but when one side surface 511 is attached at an angle to the flange 2, the reference of the angles α and β is the flange 2.
It becomes the outer surface of. Further, in the above-described embodiment, the mounting base 5 having a U-shaped cross section is shown as an example, but the present invention is not limited to this, and another shape having a portion corresponding to the one side surface 511 may be used.

[0030]

According to the present invention, in a weatherstrip that is mounted in series along the door opening edge on the side of the vehicle body, the angle of approach to the weatherstrip when the door is closed differs greatly among the parts of the weatherstrip. However, the pressing of the door deforms the sealing wall of each part substantially uniformly, and the uniform and good sealing property is exerted over the entire length of the weather strip without causing inconvenient bulging.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, in which (A),
(B) and (C) are lines AA and BB in FIG. 2, respectively.
It is a figure which shows the cross section of the attachment state of the weather strip in the position which follows the line and CC line.

FIG. 2 is a side view of an automobile.

FIG. 3 is a view showing a cross section of a conventional weather strip in a mounted state at a position along line AA in FIG.

4 (A), (B), (C) and (D) are respectively AA line, BB line, CC line and DD line in FIG.
It is a figure which shows the relationship between the flange for weather strip attachment in the position which follows a line, and the approach direction of a door at the time of a door closing.

[Explanation of symbols]

1 Door opening edge 1A roof side 1B Front vertical edge 1C Rear vertical edge 1D rocker part 2 flange 3 doors 4 door glass 5 Weather strip 5A first part 5B Second part 5C Third part 51 Mounting base 511 Side of mounting base 52 Hollow seal part 521,522 legs 522b Leg bridge 523 seal wall

Continued front page    F term (reference) 3D201 AA03 AA26 CA03 DA09 DA10                       DA27 EA01D

Claims (5)

[Claims] 1. A weather strip that is mounted in series along a door opening edge on a side surface of a vehicle body, and includes a mounting base portion that is mounted on a flange of the opening edge, and a hollow seal portion that bulges from a side surface of the mounting base portion. A leg portion having a hollow seal portion projecting outward from the side surface of the mounting base portion toward the outside of the vehicle to form a side surface portion on the outer peripheral side of the door opening and a side surface portion on the inner peripheral side of the door opening, and the tips of both leg portions. A weather strip for an automobile comprising a sealing wall made of a sponge material that connects between the curved portions, and a leg portion on the inner peripheral side of the door opening in a first portion of the weather strip attached to a roof side portion of the door opening edge. Rise angle β ₁ with respect to the side surface of the mounting base of,
The rising angle β _{2 of the} leg in the second part of the weather strip attached to the front vertical edge of the door opening edge to which the door is hinged, and the rear vertical edge of the door opening edge. The rising angle β ₃ of the leg in the third portion of the weather strip is β ₃ ≧ β
An automotive weather strip characterized by setting ₁ > β ₂ . 2. The weather strip for an automobile according to claim 1, wherein the leg portion is formed of a solid material or a fine foam material having higher rigidity than a sponge material of the seal wall. 3. The weather strip for an automobile according to claim 1, wherein the leg portion is formed in a shape projecting from a side surface of the mounting base portion and a tip end side being bent to be L-shaped and protruding. 4. The inner peripheral side of a door opening of the hollow seal portion.
The rising angle β of the leg forming the surface₁, Β₂, Β
₃Is 0 parallel to the side of the mounting base, and
The outside of the car is + (plus) and the inside of the car is-(minus)
In case β ₁20 ° to 30 °, β₂0 ° to −
15 °, β₃Is set to 30 ° to 45 °.
The weather strip for the car. 5. The weather strip is an extruded body, and the boundary portion of each portion is formed in a cross-sectional shape that gradually changes from the cross-sectional shape of one portion to the cross-sectional shape of the other portion. The weather strip for automobiles according to claim 4.