JP2011025805A - Door weather strip - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door weather strip that is light in weight and excels in sealing. <P>SOLUTION: A triangular bottom base 10 with hollow portions S is formed with a bottom 11 attached to a door panel horizontal wall 3 formed along a peripheral border of a door panel 2a, a high vertical outer wall 12 arranged outside a vehicle cabin, a low vertical inner wall 13 arranged inside the vehicle cabin, and an inclined portion 15 coupling tops of the outer wall and the inner wall. The door weather strip at least includes the bottom base 10, a hollow sealing part 20 integrally formed above and from the inclined portion 15 and for elastically contacting with a door panel rising wall 2, a lip 21 convexedly provided outward of the vehicle cabin from the top of the outer wall 12 and for elastically contacting with the door panel rising wall 2, and a support wall 14 continuing between the bottom 11 and the cabin-outside base end of the hollow sealing part 20. The outer wall 12 is formed of a low specific gravity sponge rubber member L with a specific gravity of 0.05-0.4, and other parts and portions are formed of normal sponge rubber materials with a specific gravity of 0.4-0.8. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a door weather strip that is attached along the peripheral edge of an automobile door panel, elastically contacts the body panel, and seals between the body panel and the door panel standing wall.

  This will be described with reference to FIGS. A door weather strip 30 is attached to the peripheral portion of the automobile door panel 2a so as to elastically contact the body panel 4 to ensure a sealing property between the body panel 4 and the door panel 2a.

  Conventionally, the door weather strip 30 is often made of a sponge rubber material (usually a sponge rubber material) having a specific gravity of 0.4 to 0.8 in order to ensure sealing performance. Further, for the purpose of weight reduction, a part of which is formed of a low specific gravity sponge rubber material L having a specific gravity of 0.05 to 0.4 has been devised.

  Specifically, in the roof portion P of the door weather strip 30, as shown in FIGS. 1 and 2, the bottom portion 35 assembled to the door panel horizontal wall 3 formed along the peripheral portion of the door panel 2a, and the outside of the vehicle A substantially triangular base portion 31 with a hollow portion S is formed by the vertical outer wall portion 32 having a high height, the vertical inner wall portion 36 having a low inner side of the vehicle, and the oblique side portion 37 connecting the outer wall portion 32 and the top of the inner wall portion 36. A strut wall 34 is projected from the bottom 35 to the base of the outer side of the semi-elliptical hollow seal portion 20 erected on the inner side of the oblique side 37, and a part of the bottom 35 is extended in the product length direction. It is continuously formed of a low specific gravity sponge rubber material L (about 8% of the cross-sectional area), and the other portions are usually formed of a sponge rubber material. Further, as shown in FIG. 3, the lower portion Q is generally formed of a sponge rubber material as a whole.

  In recent years, as the weight reduction of automobiles is required, the door weather strip is also required to be lightweight. In order to reduce the weight of the door weather strip, it is conceivable to form the whole or a larger part with a low specific gravity sponge rubber material.

  However, although it is conceivable to form the entire door weather strip with a low-density sponge rubber material, there are many problems in terms of sealing properties, such as a reduction in compression load (door sealing force) when the door is closed. Further, even when a larger portion of the door weather strip is formed of the low specific gravity sponge rubber material, there is anxiety about a decrease in the door sealing force depending on the formation portion.

  The present invention has been made in view of these problems, and an object of the present invention is to provide a door weather strip that is lightweight and excellent in sealing performance.

  The inventors of the present invention studied which part of the door weather strip should be formed of a low-density sponge rubber material in order to reduce the weight of the door weather strip without reducing the sealing performance. It came to invent. Hereinafter, a description will be given with reference to FIG. 1 and FIGS. 4 to 9.

  The door weather strip 1 according to claim 1 is attached to a door panel standing wall 2 of an automobile and seals between the door panel standing wall 2 and at least along the peripheral edge of the door panel standing wall 2. The bottom part 11 assembled to the door panel horizontal wall 3 formed in this way, the high vertical outer wall part 12 on the outer side of the vehicle, the low vertical inner wall part 13 on the inner side of the car, and the oblique side connecting the tops of the outer wall part 12 and the inner wall part 13 A substantially triangular base portion 10 with a hollow portion S is formed by the portion 15, a hollow seal portion 20 that is integrally formed above the inside of the oblique side portion 15 and elastically contacts the door panel standing wall 2, and the outer wall portion And a lip portion 21 that protrudes from the top of the vehicle 12 to the vehicle outer side and elastically contacts the door panel standing wall 2.

  The outer wall portion 12 is formed of a low specific gravity sponge rubber material L having a specific gravity of 0.05 to 0.4, and the other portion is formed of a normal sponge rubber material having a specific gravity of 0.4 to 0.8.

  In the door weather strip 1 according to the second aspect of the present invention, in the first aspect of the invention, the column wall 14 that is continuous from the bottom 11 to the oblique side 15 is provided so as to divide the hollow S provided in the base 10 into two. It has been.

  In the door weather strip 1 according to claim 3, in the invention according to claim 1 or 2, in addition to the outer wall portion 12, the lip portion 21 is made of a low specific gravity sponge rubber material L having a specific gravity of 0.05 to 0.4. Form.

  The door weather strip 1 according to claim 4 is the invention according to any one of claims 1 to 3, wherein the bottom portion 11 of the base portion 10 is a low specific gravity sponge rubber material L having a specific gravity of 0.05 to 0.4. Form with.

  In the door weather strip 1 according to claim 1, in the roof portion P, the lip portion 21 and the outer wall portion 12 of the base portion 10 are formed of a low specific gravity sponge rubber material L having a specific gravity of 0.05 to 0.4, Since other portions are formed of a normal sponge rubber material having a specific gravity of 0.4 to 0.8, further weight reduction can be achieved.

  That is, as compared with the prior art, conventionally, a larger portion up to a portion usually made of a sponge rubber material is formed of the low specific gravity sponge rubber material L which is lighter than the normal sponge rubber material. That is, since the material is replaced, the overall weight of the door weather strip 1 can be reduced.

  Although the outer wall 12 was made of a low specific gravity sponge rubber material L, there was a concern about a decrease in the door sealing force, but the present inventors conducted a FEM analysis (Finite Element Method) to confirm it. did. As a result, the compression load value (door seal force) of the door weather strip 1 according to the present invention (see FIG. 4) and the door weather strip 30 according to the conventional example (see FIG. 2) were equal.

  This is because the outer wall portion 12 is formed in a state of being sandwiched between the base portion 10 and the lip portion 21 that are elastically contacted with the door panel standing wall 2, so that the compressive load generated when the door is closed is prevented. This is considered to be because the base portion 10 and the lip portion 21 generate a sufficient reaction force. Thereby, it was confirmed that the door weather strip 1 according to the present invention exhibits a sufficient door sealing force (sealability). In addition, by enlarging the cross-sectional area of the vertical part 12 formed with the low specific gravity sponge rubber material L, a more sufficient door sealing force can be obtained.

  In the door weather strip 1 according to the second aspect, the column wall 14 is provided so that the hollow portion S bisects the hollow portion S in the door weather strip 1 according to the first aspect. I can do it.

  The door weather strip 1 according to claim 3 exhibits the same effect as the invention according to claim 1 or 2. Further, in addition to the outer wall portion 12, the substantially rim portion of the lip portion 21 is formed of the low specific gravity sponge rubber material L having a specific gravity of 0.05 to 0.4, so that further weight reduction can be achieved.

  In addition, when the lip part 21 was formed with the low specific gravity sponge rubber material L, it was confirmed that a sufficient door sealing force was exhibited.

  The door weather strip 1 according to the fourth aspect exhibits the same effects as the invention according to any one of the first to third aspects. Moreover, since the base part 11 of the base part 10 is formed of the low specific gravity sponge rubber material L having a specific gravity of 0.05 to 0.4, the weight reduction of the door weather strip 1 can be further promoted. Also in this case, it was confirmed that sufficient door sealing force was exhibited.

It is a side view which shows the motor vehicle which attached the door weather strip. FIG. 2 is a sectional view taken along the line XX of FIG. 1, showing a door weather strip (roof portion) according to a conventional example. FIG. 2 is a cross-sectional view taken along line YY in FIG. 1, showing a door weather strip (lower part) according to a conventional example. 1 shows a first embodiment of a door weather strip (roof portion) according to the present invention, and is a cross-sectional view taken along line XX of FIG. 1 shows a first embodiment of a door weather strip (lower part) according to the present invention and is a cross-sectional view taken along line YY of FIG. 2 shows a second embodiment of a door weather strip (roof portion) according to the present invention, and is a cross-sectional view taken along the line XX of FIG. 2 shows a second embodiment of a door weather strip (lower part) according to the present invention, and is a cross-sectional view taken along line YY of FIG. 3 shows a third embodiment of a door weather strip (roof portion) according to the present invention, and is a sectional view taken along line XX of FIG. 3 shows a third embodiment of a door weather strip (lower part) according to the present invention, and is a cross-sectional view taken along line YY of FIG.

  A first embodiment of a door weather strip 1 according to the present invention is shown in FIG. 1, FIG. 4 and FIG. The door weather strip 1 is attached to an automobile door panel standing wall 2 and seals between the body panel 4 and a base portion 10, a hollow seal portion (main seal portion) 20, a lip portion 21, and a sub seal. The unit 22 is provided.

  The base portion 10 includes a bottom portion 11 that is assembled to the door panel horizontal wall portion 3 by a retainer (not shown) or a clip (not shown) having a substantially C-shaped cross section, a high vertical outer wall portion 12 outside the vehicle, The triangular base portion 10 with the hollow portion S is formed by the low vertical inner wall portion 13 and the oblique side portion 15 connecting the outer wall portion 12 and the top portion of the inner wall portion 13. The semi-elliptical hollow seal portion 20 is integrally formed upward from the vehicle inner side of the oblique side portion 15 and has a hollow shape that elastically contacts the door panel standing wall 2. The lip portion 21 protrudes from the top of the outer wall portion 12 toward the outside of the vehicle and elastically contacts the door panel standing wall 2 to seal that portion.

  Further, the sub seal portion 22 is integrally formed on the oblique side portion 15 adjacent to the vehicle exterior side of the hollow seal portion 20. The distal end portion of the sub seal portion 22 is in elastic contact with the body panel 4 and seals the portion.

  The door weather strip 1 is provided with a column wall 14 that continues from the base 11 to the oblique side 15 so that the hollow S provided in the base 10 is divided into two in the roof portion P. . In FIG. 2, the support wall 14 is provided so as to be continuous from the bottom 11 to the outer root of the hollow seal portion 20. The outer wall portion 12 is formed of a low specific gravity sponge rubber material L having a specific gravity of 0.05 to 0.4, and the other portion of the door weather strip 1 is a normal sponge rubber having a specific gravity of 0.4 to 0.8. It is made of material.

  In the lower portion Q, the outer wall portion 12 of the base portion 10 is formed of a low specific gravity sponge rubber material L having a specific gravity of 0.05 to 0.4, and the other portion of the door weather strip 1 is set to have a specific gravity of 0. 4. It is formed of a normal sponge rubber material of 4 to 0.8. In the illustrated example, the support wall 14 like the roof portion P is not provided in the lower portion Q. However, the column wall 14 may be provided so as to divide the hollow part S provided in the base part 10 into two parts from the bottom part 11 to the oblique part 15 like the roof part P.

  In the door weather strip 1 according to the present embodiment, the roof portion P and the outer wall portion 12 of the lower portion Q are formed of a low specific gravity sponge rubber material L, so that these portions are usually made of a sponge rubber material (specific gravity 0.4). The weight can be reduced compared to that formed in ~ 0.8).

  Further, the door weather strip 1 exhibits a sufficient door sealing force when the door is closed (by FEM analysis). In the roof portion P, the outer wall portion 12 is formed of a low specific gravity sponge rubber material L, but the outer wall portion 12 is interposed between the base portion 10 and the lip portion 21 that are elastically contacted with the door panel standing wall 2. This is because the base portion 10 and the lip portion 21 (and the hollow seal portion 20 and the sub seal portion 22) generate a sufficient reaction force against the compressive load when the door is closed and the door is closed. Conceivable.

  Further, in the lower part Q, the outer wall part 12 is formed of a low specific gravity sponge rubber material L, but the outer wall part 12 has a bottom part 11 and a lip part 21 of the base part 10 that elastically contacts the door panel standing wall 2. This is because the bottom 11 and the lip 21 (and the hollow seal 20) generate a sufficient reaction force against the compressive load generated when the door is closed. it is conceivable that.

  Incidentally, the low-density sponge rubber material (see FIG. 2) of the door weather strip 30 according to the conventional example occupies only about 8% of the cross-sectional area, but the door weather strip 1 according to the present embodiment (see FIG. 4). Account for 24%.

  Further, the weight of the roof portion P is 148.4 g / m in the conventional door weather strip 30 (see FIG. 2), whereas the door weather strip 1 according to the present embodiment (see FIG. 4). Was 136.4 g / m, and 12 g / m could be reduced. In the lower part Q, the former (see FIG. 3) is 61.5 g / m, whereas the latter (see FIG. 5) is 55.8 g / m, and the weight is reduced to 5.7 g / m. I was able to.

  A second embodiment of a door weather strip 1 according to the present invention is shown in FIGS. In the door weather strip 1, in addition to the configuration of the first embodiment, in the roof portion P, the lip portion 21 is formed of a low specific gravity sponge rubber material L having a specific gravity of 0.05 to 0.4. The lip portion 21 is formed of a low specific gravity sponge rubber material L having a specific gravity of 0.05 to 0.4. By doing so, it is possible to reduce the weight of the door weather strip 1 while ensuring a sufficient door sealing force.

  In the second embodiment, as compared with the first embodiment, the cross section of the roof portion P is expanded by providing the outer wall portion 12 and the enlarged portion 12a on the vehicle outer side. Also in the lower portion Q, the outer wall portion 12 is provided with an enlarged portion 12a on the outer side of the vehicle to enlarge the cross-sectional area. However, neither of them may be provided with the enlarged portion 12a and may have the same cross-sectional form as the conventional example.

  By providing the enlarged portion 12a, the entire vehicle outer side surface of the outer wall portion 12 can be elastically contacted with the door panel standing wall 2 without gaps, so that the space between the door weather strip 1 and the door panel standing wall 2 can be reduced. Sealing performance can be improved, and intrusion of water, wind, noise, etc. into the room can be prevented. In addition, by doing this, it is possible to increase the reaction force against the compressive load when the door is closed.

  A third embodiment of a door weather strip 1 according to the present invention is shown in FIGS. The feature of the door weather strip 1 is that the bottom portion 11 of the base portion 10 is also formed of the low specific gravity sponge rubber material L. Thereby, the big effect that the further weight reduction of the door weather strip 1 can be achieved is exhibited. The door weather strip 1 can also exhibit a sufficient door sealing property. Moreover, the support | pillar wall 14 can be inserted as shown with a temporary line in FIG. 9, and the fall of a compressive load can be prevented.

DESCRIPTION OF SYMBOLS 1 Door weather strip 2 Door panel standing wall 2a Door panel 3 Door panel horizontal wall 4 Body panel 10 Base part 11 Bottom part 12 Outer wall part 12a Enlarged part 13 Inner wall part 14 Column wall 15 Oblique side part 20 Hollow seal part 21 Lip part 22 Sub seal part 30 Door weather strip 31 Base portion 32 Outer wall portion 34 Support wall 35 Bottom side portion 36 Inner wall portion 37 Oblique side portion L Low specific gravity sponge rubber material P Roof portion Q Lower portion S Space portion

Claims (4)

  A door weather strip, which is attached to an automobile door panel standing wall (2) and seals between the body panel (4) and formed at least along the peripheral edge of the door panel standing wall. It is hollow by the bottom part (11) assembled to (3), the high vertical outer wall part (12) outside the vehicle, and the oblique part (15) connecting the outer wall part (12) and the top part of the inner wall part (13). A hollow seal portion (20) which forms a triangular base portion (10) with a portion (S), is integrally formed above the oblique side portion (15) and on the vehicle interior side, and elastically contacts a standing wall of the door panel; and the outer wall A lip portion (21) projecting outward from the top of the vehicle and elastically contacting the standing wall of the door panel, the outer wall portion having a low specific gravity sponge rubber material (L) having a specific gravity of 0.05 to 0.4 The other part is formed with a specific gravity of 0.4. Door weather strip, characterized in that formed at 0.8 normal sponge rubber material (N).   The strut wall (14) continuous from the base (11) to the oblique side (15) is provided so as to divide the hollow (S) provided in the base (10) into two parts. Door weather strip as described in.   The door weather according to claim 1 or 2, wherein, in addition to the outer wall portion (12), the lip portion (21) is formed of a low specific gravity sponge rubber material (L) having a specific gravity of 0.05 to 0.4. strip.   4. The door weather according to claim 1, wherein the bottom portion (11) of the base portion (10) is formed of a low specific gravity sponge rubber material (L) having a specific gravity of 0.05 to 0.4. strip.

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