Drainage and exhaust structure and door weather strip

Abstract

To ensure water-tightness at corners of a door weather strip and improve exhaust performance when a door is closed.SOLUTION: In a molded part 13 of a door weather strip 1a, a first extension base 136 is integrally provided with a mounting base 131 and has a generally trapezoidal flow-down surface 130 extending from a roof side toward a pillar. An extension seal lip 138 is integrally provided with a roof-side first seal lip 133 on an outer peripheral edge of the first extension base 136 so as to abut against a door panel, securing a drainage / exhaust port 137 between it and a pillar-side second seal lip 135. A third seal lip 14 is integrally provided with the first seal lip 133 on the flow-down surface 130 near a lower end of the first extension base 136 so as to abut against the door panel, securing an exterior exhaust port 140 between it and the second seal lip 135. A fourth seal lip 15 is provided at an interior corner portion of the molded part 13 so as to abut against the door panel, securing an interior exhaust port 150.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a corner structure of a door weatherstrip that is attached to an automobile door panel and provides a seal between the door panel and the vehicle body panel. [Background technology]

[0002] An example of a conventional door weatherstrip that seals between a door panel and a vehicle body panel is the door weatherstrip 9 shown in FIG. 6 disclosed in Patent Document 1.

[0003] The door weatherstrip 9 includes a molded portion 13 that joins an upper extrusion portion 11 on the roof side and a lower extrusion portion 12 on the pillar side to form a corner portion.

[0004] In the molded portion 13, the hollow mounting base portion 131 is continuous with the hollow mounting base portions 131 of the upper extrusion molded portion 11 and the lower extrusion molded portion 12. The hollow seal portion 132 is continuous with the hollow seal portions 132 of the upper extrusion molded portion 11 and the lower extrusion molded portion 12. The roof-side first seal lip 133 is continuous with the first seal lip 133 of the upper extrusion molded portion 11. The roof-side sub-lip 134 is continuous with the sub-lip 134 of the upper extrusion molded portion 11. The pillar-side second seal lip 135 is continuous with the second seal lip 135 of the lower extrusion molded portion 12.

[0005] Furthermore, a first extension base 136 having a generally trapezoidal flow-down surface 130 extending from the roof side toward the pillar is provided on the mounting base 131 of the molded portion 13. An extension seal lip 138 is provided integrally with the first seal lip 133 on the outer peripheral edge of the first extension base 136 so as to abut against the door panel at the lower end of the first extension base 136, ensuring a drainage and exhaust port 137 between the extension seal lip 138 and the second seal lip 135. Furthermore, a third seal lip 14 is provided on the flow-down surface 130, continuing from the first seal lip 133 and the second seal lip 135, and abutting against the door panel along the seal line S3 as shown in FIG.

[0006] A fourth seal lip 15 is provided at the corner portion of the molded portion 13 on the vehicle interior side of the mounting base 131 of the molded portion 13 to ensure a seal line S4 with the door panel. The fourth seal lip 15 is formed on the end surface of a second extension base 18 that extends from the corner portion of the molded portion 13 on the vehicle interior side toward the pillar and is provided integrally with the mounting base 131 of the molded portion 13.

[0007] In the molded portion 13, water that has entered between the third seal lip 14 and the extended seal lip 138 flows down along the flow-down surface 130 and is discharged outside the vehicle from between the third seal lip 14 and the end of the extended seal lip 138. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Patent No. 5476154 Summary of the Invention [Problem to be solved by the invention]

[0009] Generally, door weatherstrips have a continuous seal line around the entire periphery to ensure waterproofing, which separates the interior and exterior spaces of the vehicle and does not allow for proper ventilation inside the vehicle.

[0010] When the door closes when getting in or out of a car, air from outside the vehicle is drawn into the vehicle, temporarily increasing the air pressure inside the vehicle. However, even if the vehicle is equipped with an exhaust vent, if there is a lot of exhaust air coming from inside the vehicle, the air pressure inside the vehicle and the reaction force of the door weatherstrip may prevent the door from closing completely.

[0011] In order to prevent water from entering the vehicle interior, the door weatherstrip 9 has a seal line S3 between the third seal lip 14 and the door panel that is continuously connected to the second seal lip 135 of the lower extrusion 12, as shown in FIG. 7, and therefore does not ensure exhaust performance when the door is closed.

[0012] SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to ensure waterproofing at the corners of a door weather strip and to improve exhaust performance when the door is closed. [Means for solving the problem]

[0013] Therefore, one aspect of the present invention has a molded portion that joins an upper extrusion molded portion on the roof side and a lower extrusion molded portion on the pillar side, wherein the upper extrusion molded portion has a first seal lip that abuts against the inner surface of the sash portion on the roof side, and the lower extrusion molded portion has a second seal lip that abuts against the inner surface of the sash portion on the pillar side, the molded portion has a first extension base portion with a flow-down surface extending in the pillar direction, and an extended seal lip that is provided on the outer peripheral edge of the first extension base integrally with the first seal lip so as to abut against the door panel, securing a drainage exhaust port between it and the second seal lip, a third seal lip is provided on the flow-down surface integrally with the first seal lip so as to abut against the door panel, securing an exterior exhaust port between it and the second seal lip, and a fourth seal lip is formed at an interior corner portion of the molded portion so as to abut against the door panel, securing an interior exhaust port. [Effects of the Invention]

[0014] According to the present invention, watertightness at the corners of the door weatherstrip is ensured and the exhaust performance during the door closing operation is improved. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a perspective view of a corner portion of a door weather strip according to an embodiment of the present invention; [Figure 2] FIG. 2 is an explanatory diagram of the flow of exhaust and drainage water at a corner portion of FIG. 1. [Figure 3] Cross-sectional view of KG1-KG1 in Figure 1. [Figure 4] Cross-sectional view of KG2-KG2 in Figure 1. [Figure 5] 1 is a side view of a vehicle having front and rear doors to which the door weather strip of the present invention is applied; [Figure 6] FIG. 10 is a perspective view of a corner portion of a conventional door weather strip. [Figure 7] 7 is a perspective view showing a seal line between the door panel and the corner portion of FIG. 6. DETAILED DESCRIPTION OF THE INVENTION

[0016] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a door weather strip according to the present invention will be described with reference to the drawings.

[0017] The drainage and exhaust structure of the present invention is applied to the corner portions surrounded by dotted lines d of door weatherstrips 1a and 1b attached to door sash portions 5 and 6 of front door 3 and rear door 4 of an automobile 2 illustrated in FIG.

[0018] The door weatherstrips 1a, 1b are attached along the peripheries of the front door 3 and rear door 4 of the automobile 2, respectively, and seal the gap between the front door 3 and rear door 4 and the body panel 7 of the automobile 2 when the front door 3 and rear door 4 in FIG. 5 are closed.

[0019] The door weatherstrip 1a shown in FIG. 1 has a molded portion 13 that joins an upper extrusion portion 11 on the roof side and a lower extrusion portion 12 on the pillar side to form a corner portion.

[0020] As shown in Fig. 1, the upper extrusion portion 11 includes a hollow mounting base 131, a hollow seal portion 132, a first seal lip 133, and a sub-lip 134. The mounting base 131 is continuous with the roof-side mounting base 131 of the molded portion 13, and as shown in Fig. 3, is fitted and held by a retainer 51 in the roof-side door sash portion 5 of the door panel 8. The hollow seal portion 132 is continuous with the hollow seal portion 132 of the molded portion 13, and abuts against the door panel 8 on the vehicle interior side of the mounting base 131, and also elastically contacts the roof-side body panel 7 when the front door 3 is closed. The first seal lip 133 is continuous with the roof-side first seal lip 133 of the molded portion 13, and abuts against the inner surface of the door sash portion 5 on the vehicle exterior side of the mounting base 131. The sub-lip 134 is continuous with the sub-lip 134 on the roof side of the molded portion 13, and elastically contacts the body panel 7 on the vehicle exterior side of the mounting base 131 when the front door 3 is closed.

[0021] As shown in Fig. 1, the lower extrusion 12 includes a hollow mounting base 131, a hollow seal portion 132, and a second seal lip 135. The mounting base 131 is continuous with the pillar-side mounting base 131 of the molded portion 13, and is attached to the periphery of the door panel 8 as shown in Fig. 4. The hollow seal portion 132 is continuous with the hollow seal portion 132 of the molded portion 13, and elastically contacts the pillar-side body panel 7 on the vehicle interior side of the mounting base 131 when the front door 3 is closed. The second seal lip 135 is continuous with the pillar-side second seal lip 135 of the molded portion 13, and abuts against the inner surface of the door panel 8 on the vehicle exterior side of the mounting base 131.

[0022] 1 and 2, the molded portion 13 includes a hollow mounting base 131, a hollow seal portion 132, a roof-side first seal lip 133, a pillar-side second seal lip 135, a first extended base 136, and an extended seal lip 138. The first extended base 136 is formed integrally with the mounting base 131 and has a generally trapezoidal flow-down surface 130 extending toward the pillar. The extended seal lip 138 is formed integrally with the first seal lip 133 on the outer peripheral edge of the first extended base 136 so as to abut against the door panel 8 at the lower end of the first extended base 136, ensuring a drainage and exhaust port 137 between the first extended base 136 and the second seal lip 135.

[0023] In addition, a third seal lip 14 is provided integrally with the first seal lip 133 on the flow-down surface 130 near the lower end of the first extension base 136 so as to abut against the door panel 8 while securing an exterior exhaust port 140 between the second seal lip 135 and the third seal lip 144.

[0024] Furthermore, the mounting base 131 of the molded portion 13 is further provided with a fourth seal lip 15 that abuts against the door panel 8 so as to ensure an interior exhaust port 150 at the corner portion of the molded portion 13 on the interior side of the vehicle.

[0025] The fourth seal lip 15 is formed on the end surface of a rectangular plate-shaped (e.g., substantially trapezoidal) second extension base 16 that extends from a corner portion on the vehicle interior side of the molded portion 13 toward the pillar and is provided integrally with a mounting base 131 of the molded portion 13. Furthermore, this second extension base 16 is provided integrally with the mounting base 131 with a guide portion 17 that has a guide surface 170 that guides exhaust from the vehicle interior exhaust port 150 to the vehicle exterior exhaust port 140.

[0026] One end A of the fourth seal lip 15 that secures the interior exhaust port 150 is set higher than one end B of the third seal lip 14 that secures the exterior exhaust port 140. In addition, one end B of the third seal lip 14 is set closer to the interior side of the vehicle than one end A of the fourth seal lip 15 that secures the interior exhaust port 150.

[0027] The function and effect of the door weatherstrip 1a will be described below with reference to Fig. 2. In Fig. 2, dotted lines indicate exhaust paths, and dashed lines indicate drainage paths.

[0028] When the front door 3 is being closed, air taken into the vehicle interior flows through the interior exhaust port 150 of the molded portion 13 of the door weatherstrip 1a and into the guide portion 17. The air that reaches the guide portion 17 flows downward along the guide surface 170 toward the pillar and flows to the exterior exhaust port 140. The air that flows from the exterior exhaust port 140 to the vicinity of the lower end of the downward flow surface 130 of the first extension base 136 is quickly discharged to the outside through the drainage / exhaust port 137. Meanwhile, water that has entered the first extension base 136 of the molded portion 13 flows downward along the downward flow surface 130 toward the pillar and is quickly discharged to the outside through the drainage / exhaust port 137.

[0029] As described above, with the door weatherstrip 1a, air taken into the vehicle when the front door 3 is closing is discharged to the outside of the vehicle through the interior exhaust port 150, the exterior exhaust port 140, and the drainage exhaust port 137 of the molded portion 13. This ensures watertightness at the corners of the door weatherstrip 1a and improves exhaust performance during the door closing operation.

[0030] In particular, by positioning the interior exhaust port 150 higher than the exterior exhaust port 140 in the molded portion 13, the seal line S1 from the pillar side and the seal line S2 from the roof side intersect, resulting in discontinuity of the seal line with the door panel 8. Furthermore, air that is drawn into the vehicle during the process of closing the front door 3 bypasses the seal lines S1 and S2 and is discharged from the drain / exhaust port 137 of the molded portion 13. This prevents an increase in air pressure inside the vehicle, eliminates resistance when the front door 3 closes, and improves the closing performance of the front door 3.

[0031] In addition, by setting one end A of the fourth seal lip 15, which secures the interior exhaust port 150 together with the intersection of the seal lines S1 and S2, higher than one end B of the third seal lip 14, which secures the exterior exhaust port 140, water is prevented from entering the interior of the vehicle, achieving both water-stopping performance and exhaust performance.

[0032] Furthermore, by setting one end B of the third seal lip 14 closer to the vehicle interior side than one end A of the fourth seal lip 15, water is prevented from entering the vehicle interior exhaust port 150 from the vehicle exterior exhaust port 140, thereby further improving exhaust performance and water-stopping performance.

[0033] The fourth seal lip 15 extends toward the pillar and is formed on the end face of the second extension base 16, securing the interior exhaust port 150 at the corner portion on the interior side of the vehicle of the molded portion 13, thereby enabling exhaust from the corner portion. Furthermore, the provision of the guide portion 17 having the guide surface 170 in the second extension base 16 improves the efficiency of exhaust from the interior exhaust port 150 to the exterior exhaust port 140, further improving the exhaust performance.

[0034] Furthermore, it is clear that the drainage and exhaust structure of the present invention can achieve the same water-stopping and exhaust performance effects as those described above even when applied to the corner portion surrounded by dotted line d of door weatherstrip 1b attached to door sash portion 6 of rear door 4 of automobile 2 in Figure 5. [Explanation of symbols]

[0035] 1a, 1b...Door weather strip 2...automobile, 3...front door, 4...rear door, 5, 6...door sash portion, 7...body panel, 8...door panel, 51...retainer 11...upper extrusion molding section, 12...lower extrusion molding section, 13...mold molding section 130... flow down surface, 131... mounting base, 132... hollow seal portion, 133... first seal lip, 134... sub lip, 135... second seal lip, 136... first extension base, 137... drainage exhaust port, 138... extension seal lip 14...Third seal lip, 140...Exterior exhaust port 15...Fourth seal lip, 150...Interior exhaust port 16…Second extension base 17...guide portion, 170...guide surface

Claims

1. The roof-side upper extrusion and the pillar-side lower extrusion have molded portions that join together. the upper extrusion portion includes a first seal lip that abuts against an inner surface of the door sash portion on the roof side, the lower extrusion portion includes a second seal lip that abuts against the inner surface of the door sash portion on the pillar side, the molded portion includes a first extension base portion having a flow-down surface extending from the roof side toward the pillar, and an extension seal lip provided integrally with the first seal lip on an outer peripheral edge of the first extension base portion so as to abut against the door panel while securing a drainage and exhaust port between the first seal lip and the second seal lip, a third seal lip is provided integrally with the first seal lip on the flow-down surface so as to secure an outside exhaust port between the third seal lip and the second seal lip and to abut against the door panel; A fourth seal lip is formed at the corner of the molded portion on the vehicle interior side, which secures an exhaust port inside the vehicle and abuts against the door panel. A drainage and exhaust structure characterized by:

2. 2. The drainage and exhaust structure according to claim 1, wherein one end of the fourth seal lip that secures the interior exhaust port is set higher than one end of the third seal lip that secures the exterior exhaust port.

3. 2. The drainage and exhaust structure according to claim 1, wherein one end of the third seal lip that secures the vehicle exterior exhaust port is set closer to the vehicle interior side than one end of the fourth seal lip that secures the vehicle interior exhaust port.

4. The drainage and exhaust structure according to claim 1, characterized in that the fourth seal lip is formed on the end surface of a second extension base portion that extends from a corner portion on the vehicle interior side of the molded portion toward the pillar and is formed integrally with the molded portion.

5. The drainage and exhaust structure according to claim 4, wherein the second extension base is provided with a guide portion that guides exhaust air from the interior exhaust port to the exterior exhaust port.

6. A door weather strip comprising the drainage and exhaust structure according to claim 1.

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