JP2000006733A - Weather strip for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the falling and crushing of the hollow seal part of a weather strip. SOLUTION: A hollow seal part 6 is integrally formed by extrusion in an attached part 4 attached to the flange of a car body opening via two rows of neck parts 5a and 5b and, by adjusting a rubber feeding quantity, in the specified section of a longitudinal direction along the flange, the heights of the two rows of necks are changed to prevent the falling of the hollow seal part 6, the heights of the neck parts 5a and 5b are set higher than those of the other sections to provide rigidity in a height direction, and the crushing of the hollow seal part 6 is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weather strip which is attached to a flange of a vehicle body opening edge or a door edge at a vehicle body opening, such as a door portion or a trunk portion of an automobile, to seal the opening. It is about.

[0002]

2. Description of the Related Art FIG. 5 is a perspective view showing a state in which a weather strip is attached to an opening of a trunk portion of an automobile. FIG.
As shown, the weather strip 100 includes a mounting portion 104 having a U-shaped cross section mounted on a peripheral flange 103 of a trunk portion 101, and a hollow sealing portion 106 connected to the mounting portion 104 via a neck 105. Are integrally formed by extrusion.

However, in the peripheral flange 103 of the trunk portion 101, the hollow seal portion 106 falls or collapses depending on the bending direction of the corner portion, so that the height of the seal portion is reduced, and as a result, the elasticity with the door or the like is reduced. Poor connection caused water leakage and sound leakage.

FIG. 6A is a sectional view taken along the line AA of FIG.
FIG. 4 is a longitudinal sectional view of a weather strip sandwiched between linear portions of a flange 103, in which a hollow seal portion 106 has a cylindrical shape and a predetermined seal height is secured.

FIG. 6B is a cross-sectional view taken along the line BB of FIG. 5, and is a vertical cross-sectional view of the weather strip 100 at a corner E where the flange 103 is bent in a direction perpendicular to the plate surface. In this corner portion E, the hollow seal portion 106
Since the outer peripheral side in the bending direction extends in the length direction, the hollow seal portion 106 falls inward in the bending direction (the direction of the arrow in FIG. 6B), and as a result, the seal height (from the upper end of the flange to the upper end of the hollow seal portion) (The distance: the same applies hereinafter)) was lower than the seal height at the linear portion, and sealing failure sometimes occurred.

FIG. 6C is a cross-sectional view taken along the line CC of FIG. 5, and is a vertical cross-sectional view of the weather strip 100 at a corner portion F where the flange 103 is bent in the plate surface direction. In this corner portion F, the outer peripheral side in the bending direction of the hollow seal portion 106 extends, so that the hollow seal portion 106 is easily crushed, the seal height is reduced, and the sealing failure may occur in the same manner as described above.

[0007]

In order to solve the above-mentioned conventional hollow seal portion 106 from falling down or crushing, as shown in FIG. Attempts have been made to increase the rigidity of the stuffing, but such a filling operation of the filling 107 is
Since the operation is performed only in a part of the hollow seal portion, the operation is complicated, and causes a cost increase.

[0008]

The inventor of the present invention has conducted intensive studies on the structure of a weather strip capable of maintaining a sealing function without performing any padding or the like, and as a result, has focused on the neck connecting the mounting portion and the hollow seal portion. The neck portion is formed in a double row to increase the rigidity of the neck portion, and a method of minimizing the collapse and collapse of the hollow seal portion at the bent portion is adopted. In (2), if the position (horizontal position (including angle) and height) of the hollow seal portion with respect to the mounting portion is changed in advance, the hollow seal portion can be prevented from collapsing and collapsing even when assembled to the flange, and The inventors have found that the height can be made equal to other portions such as the straight portion of the flange, and have completed the present invention.

Specifically, at a portion where the hollow seal portion is expected to fall, during molding before assembling to the flange, the position of the hollow seal portion is set in a direction opposite to the direction in which the hollow seal portion is expected to fall. What is necessary is just to set so that it may shift. For example, in a predetermined section corresponding to a corner where the flange bends in a direction perpendicular to the plate surface direction, the position of the hollow seal portion with respect to the mounting portion is shifted outward in the bending direction.
Then, even when the hollow seal part is shifted from the outside in the flange bending direction to the inside when assembling to the flange,
Since it is located substantially at the center of the mounting portion, the sealing height of the hollow seal portion can be secured without using a padding as in the related art, so that poor sealing can be prevented.

[0010] Further, at a portion where the hollow seal portion is expected to be crushed, the height of the neck portion is made higher than usual to further increase the rigidity before assembling to the flange. For example, at the corners bent in the plate surface direction of the flange, if the height of each neck of the double row is higher than the other sections,
As the rigidity in the height direction is increased and the height of the neck is increased, the distance (curvature radius) from the center of bending of the flange on the outer peripheral side of the hollow seal part is larger than before,
At the time of assembling to the flange, the bending deformation of the hollow seal portion can be suppressed as much as possible, and the seal height can be maintained without using the padding as in the related art, and the seal failure can be prevented.

The above-mentioned weather strip is formed by forming a hollow seal part separately from an integral extruded product of a mounting part and a neck part and joining them together, or by extruding the mounting part, the neck part and the hollow seal part. Any of the integral molding methods can be employed, but integral extrusion is advantageous in that the production process can be simplified.

[0012] In the case of extrusion molding, as a measure for shifting the position (left or right position or height) of the hollow seal portion with respect to the mounting portion, a movable die is provided in an extrusion die of an extruder, and the hollow seal portion is moved by moving the movable die. Although it is conceivable to change the formation position of the hollow seal portion, the position of the hollow seal portion can be easily changed by adjusting the supply amount of the rubber or the synthetic resin at the neck portion.

For example, if the amount of rubber supplied to the neck is increased, the shape of the extrusion die does not change, so that there is no escape route for the rubber material, and the height of the neck can be increased by expanding after passing through the die. Therefore, for any of the double-row necks, the height of the neck can be set high by increasing the amount of rubber supplied at the site where collapse is expected.

If the amount of rubber supplied to any one of the necks in the double row is adjusted (reduced or increased), there is a difference in height between the height of the neck and the height of the other neck. Accordingly, the position of the hollow seal portion with respect to the mounting portion can be shifted in the left-right direction (lateral direction) by tilting the hollow seal portion toward the lower neck portion. In particular, this adjustment of rubber supply
In the corner portion bent in the direction perpendicular to the plate surface direction of the flange, when the position of the hollow seal portion with respect to the mounting portion is shifted outward in the bending direction, the height of the neck portion in the bending direction is higher than the height of the inner neck portion. It is effective when setting low. In this case, the height of the necks can be changed by either one of reducing the height of one of the necks and increasing it.

The measures to change the height of these necks or to make them higher than the height of the necks in other sections may be made in accordance with the bent shape of the peripheral flange or the door edge of the opening edge of the vehicle body to which the weather strip is attached. . Therefore, the present invention can be applied to a weather strip obtained by combining both of them, or to a weather strip used alone. Further, these measures adopt a configuration in which the height of the necks in the double row is changed at the same location of the weather strip, and the height of each neck is higher than that of the other sections. It is also possible to adopt a mode in which the position of the part is freely changed in any of up, down, left and right directions.

The changing range of the neck height can be variously set according to the seal height, and can be set freely within a range of about 1 to 3 mm. The neck of the double row is not particularly limited as long as it is two or more rows, but the neck of the two rows is
When setting the left and right positions of the hollow seal portion or the like, it is preferable in that the adjustment of the rubber supply amount can be performed relatively easily. In addition, as the material of the weather strip, any of rubber and synthetic resin capable of exhibiting a sealing function can be adopted.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a weather strip according to the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of a weather strip that has been subjected to a fall prevention measure according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of a weather strip that has also been subjected to a collapse prevention measure.

As shown in the figure, the weather strip 1 according to the present embodiment is, as shown in FIG.
01, which is attached to a flange 103 which is formed by bending outward from the body side,
A mounting portion 4 sandwiched between the flanges 103;
And a hollow seal portion 6 connected via neck portions 5a and 5b are integrally formed by extrusion molding of rubber, and both ends thereof are subjected to terminal treatment and joined in a loop shape.

The mounting portion 4 has a U-shaped cross section composed of a top portion 4a and two legs 4b, 4b, a flat plate member formed by embedding a metal core 7 in solid rubber and being integrated by extrusion. The groove 8 is formed inside the U-shape so as to be fitted to the flange 103. A plurality of locking lips 9 are integrally formed on the inner wall of the U-shaped groove 8, and the wall of the flange 103 can be sandwiched and held from both sides by the locking lips 9.

The hollow seal portion 6 is formed in a cylindrical shape by using sponge rubber, and the lower portion thereof has a neck portion 5a,
It is formed integrally with the top portion 4a of the mounting portion 4 via the base 5b, and is elastically in contact with the periphery of the trunk door to be deformable.

The necks 5a and 5b connect the top 4a of the mounting part 4 and the lower part of the hollow seal part 6, are continuous in the length direction, and are spaced apart in the lateral direction (lateral direction). They are arranged in two rows. These two rows of necks 5a, 5b
It is extruded integrally with the mounting part 4 and the hollow seal part 6. The necks 5a and 5b in two rows are set at the same height in the straight portion of the flange 103,
Corner portion E (FIG. 5)
), The height between the necks 5a and 5b is changed.

That is, in a portion to be assembled to a corner portion E which is bent in a direction perpendicular to the plate surface of the flange 103, a neck portion located in a direction opposite to the bending direction of the flange (outside in the bending direction), for example, a right side portion in FIG. The height H1 of the neck 5b is 1 to 3 mm higher than the height H0 of the left neck 5a.
Extruded to be higher in the range of
The position of the hollow seal portion 6 is inclined leftward (outward in the bending direction) with respect to the mounting portion 4. Then, at the time of assembling to the flange 103, the hollow seal portion 6 at the corner portion E returns to the center position of the mounting portion 4, and the seal height can be secured, so that water leakage and sound leakage can be prevented.

In order to increase the height of the right neck 5b, if the amount of rubber supplied to the right neck 5b is adjusted to be larger than that of the left neck 5a, the rubber is extruded from an extrusion die (not shown). After that, it expands and rises. The adjustment of the amount of rubber is performed by changing the number of rotations of a screw in a cylinder of an extruder (not shown) for supplying rubber to each of the necks 5a and 5b, or between the extruder and an extrusion die (not shown). A rubber amount adjustment valve (not shown)
It can be done in various ways. The height of the left neck portion 5b is gradually increased from the straight portion of the flange 3 toward the corner portion, and is set to be highest at the center position of the corner portion E.

At the bending position of the flange 3 in the plate surface direction (see the portion F in FIG. 5), as shown in FIG.
It is extruded so that the height H2 of 5b is higher than the height H0 of the straight portion of the flange. Thereby, the rigidity of the neck portions 5a and 5b in the height direction is enhanced, and even if the hollow seal portion 6 is crushed by the bending at the time of assembling the flange, the seal height can be suppressed to be equal to other portions. And a good sealing function can be exhibited.

This change in height may be achieved by simultaneously increasing the amount of rubber supplied to both necks 5a and 5b. Also, the neck 5a,
The height of 5b is gradually increased from the straight portion of the flange 103 toward the corner, and is set to be highest at the center of the corner.

As described above, the position of the hollow seal portion 6 relative to the mounting portion 4 (left and right) is adjusted in advance by adjusting the amount of rubber supplied to the portion where the hollow seal portion is expected to collapse or collapse. Change the slope or height of the
At the time of assembling the vehicle, the sealing height of the part can be made equal to other parts, and the sealing function can be ensured.

In the above embodiment, two rows of necks 5 are provided.
Among the a and 5b, an example was shown in which the rubber supply amount of one neck 5b was increased to increase the height thereof.
As shown in FIG. 3, the height H5 of the neck located inside the flange curved portion, for example, the right neck 5b is set lower than the height H0 of the left neck 5a, and the hollow seal portion 6 is inclined to the outside of the curved portion. It may be. In this case, the height may be adjusted by adjusting the rubber supply amount.

Further, as shown in FIG. 4, the position of the hollow seal portion 6 may be changed up, down, left and right according to the bent shape of the flange. That is, the heights H2, H3, H4 of the two necks 5a, 5b are all set higher than the height H0 of the neck of the straight portion of the flange,
The height H3 and H4 of one of the necks 5b may be different from the height H2 of the other neck 5a to shift the position of the hollow seal portion 6 left and right. In this case, the height of the necks 5a and 5b can be easily changed by separately adjusting the rubber supply amount.

[0029]

As is apparent from the above description, according to the present invention, the neck portion connecting the mounting portion and the hollow seal portion is formed in a double row to increase the rigidity, and at the bending portion such as the corner portion of the weather strip. By changing the height of the necks in the double row, it is possible to prevent the hollow seal from falling, and similarly, if the height of the neck in the bent portion is made higher than the other portions to have rigidity in the height direction Also, the collapse of the hollow seal portion can be prevented, and in any case, the seal height of the hollow seal portion can be set to be equal to that of the other portions, and the sealing function can be improved.

Furthermore, if these height adjustments are performed by adjusting the supply amount of rubber or synthetic resin material at the time of extrusion molding, molding can be performed relatively easily in an extruder using a movable die. is there.

[Brief description of the drawings]

FIG. 1, showing an embodiment of the present invention, is a cross-sectional view of a weather strip in which one of two necks is raised by increasing a supply amount of rubber.

FIG. 2 is a sectional view of a weather strip in which the height of two rows of necks is increased by increasing the amount of supplied rubber.

FIG. 3 is a cross-sectional view of a weather strip in which one of two necks is lowered by reducing a rubber supply amount.

FIG. 4 is a cross-sectional view of the weather strip showing a state in which the position of the neck (the left-right position and the height) is freely changed by adjusting the rubber supply amount.

FIG. 5 is a perspective view showing a state in which a weather strip is attached to a vehicle body opening of a trunk portion of the automobile.

6A is a sectional view taken along line AA of FIG. 5, FIG. 6B is a sectional view taken along line BB of FIG. 5, and FIG. 6C is a sectional view taken along line CC of FIG.

FIG. 7 is a cross-sectional view of a conventional weatherstrip in which a hollow seal portion is padded at each corner of a vehicle body opening.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Weather strip 4 Attaching part 5a, 5b Neck part 6 Hollow seal part 7 Core member 8 Groove part 9 Locking lip 101 Trunk 103 Flange

Claims (6)

[Claims] A mounting portion attached to a flange of a vehicle body opening or a door peripheral edge; and a hollow seal portion connected to the mounting portion via a neck portion, wherein the neck portion is formed in a double row. In a section in which the hollow seal portion is expected to fall or collapse when assembled to the flange, a weather strip for an automobile formed in advance to change the lateral position or the height of the hollow seal portion with respect to the mounting portion. . 2. In a section where the flange is bent in a direction perpendicular to the plate surface direction, the height of the neck in the bending direction of the double-row neck is set lower than the height of the inner neck in advance. The automotive weather strip according to claim 1, wherein the position of the hollow seal portion with respect to the mounting portion is shifted outward in the bending direction. 3. The automotive weather strip according to claim 1, wherein in the section of the flange that is bent in the plate surface direction, the height of each neck in the double row is higher than the height of the necks of the other sections in advance. . And a mounting portion attached to a flange of a vehicle body opening or a door peripheral edge of the automobile, and a hollow seal portion connected to the mounting portion via a neck portion, wherein the neck portion is formed in a double row, In a section in which the hollow seal portion is expected to collapse and collapse at the time of assembling to the flange, the height of the double-row necks is changed in advance, and the height of each neck in the section is changed to the height of another section. An automotive weatherstrip formed higher than the neck height. 5. The method according to claim 1, wherein the necks of the double rows are two rows.
The weather strip for an automobile according to 2, 3, or 4. 6. The mounting part, the neck part and the hollow seal part are integrally formed by extrusion molding of rubber or synthetic resin,
The height of the necks is changed or / and the height of each neck is made higher than the necks of the other sections by adjusting the supply amount of the rubber or synthetic resin material of the neck.
The weatherstrip for an automobile according to 2, 3, 4, or 5.