JP2012011908A - Low specific gravity door weather strip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a door weather strip having a low specific gravity, excellent sound insulation property and excellent door closing performance.SOLUTION: The door weather strip for a vehicle which has a specific gravity of 0.2-0.5 (low specific gravity) is composed of: an attaching base part 20 attached to a retainer 3 of a door; a hollow seal part 30 integrally molded with the attaching base part 20 and elastically contacted with a body panel 4; and an outer lip part 10 which is integrally molded in the vehicle outside E from the hollow seal part 30 of the attaching base part 20, which has a nearly dog-leg-shaped cross-section provided with an upper part 12 and a lower part 13 across a bent part 11 formed in the middle height part of the an outer lip part and which is elastically contacted with the body panel 4. A groove part 14 is formed in the vehicle outside E of the bent part 11 of the outer lip part 10, a projecting part 15 is formed on the upper end part of the vehicle outside of the lower part 13 and in the door closing, the vehicle outside surface of the upper part 12 bent to the vehicle outside E is elastically contacted with the projecting part 15.

Description

  The present invention relates to a weather strip for automobiles having a low specific gravity (light weight) and excellent sound insulation and door closing properties.

  This will be described with reference to FIGS. A door weather strip 50 is attached to the door of the automobile along the outer peripheral end portion thereof to ensure a sealing property with the body. The door weather strip 50 is similar to the mounting base 51 attached to the retainer 3 formed along the outer peripheral end of the door panel 2 and the hollow seal portion 52 integrally formed with the mounting base 51 and elastically contacting the body panel 4. And an outer lip portion 53 that is integrally formed with the attachment base portion 51 and elastically contacts the body panel 4 on the vehicle outer side E from the hollow seal portion 52.

  The hollow seal portion 52 and the outer lip portion 53 that are elastically in contact with the body panel 4 prevent water from entering the interior of the room, ensure sound insulation, and prevent sound entry and leakage.

  In the conventional door weather strip having such a function, the specific gravity of the conventional door weather strip is generally set to 0.5 to 0.7. However, in recent years, 0.2 to 0. It is set to 5.

JP 2001-270332 A

  However, these recent low-specific gravity door weather strips have a low surface density, and therefore have a problem that their sound insulation is not sufficient as compared with normal specific gravity door weather strips.

  In order to solve such a sound insulation problem, it is necessary to increase the thickness of the outer lip portion 53 and the hollow seal portion 52 of the door weather strip 50 as shown in FIG. However, for example, if the outer lip portion 53 is simply set to a large thickness, there is a problem that the reaction force at the time of closing the door increases and the door closing performance deteriorates. Therefore, some structural device is required.

  The present invention has been devised in view of these problems, and an object thereof is to provide a door weather strip having a low specific gravity (light weight) and excellent sound insulation and door closing properties.

  This will be described with reference to FIG. 1 and FIGS. The low specific gravity door weather strip 1 according to claim 1 is a door weather strip for automobiles having a specific gravity of 0.2 to 0.5 (low specific gravity). The low specific gravity door weather strip 1 includes a mounting base 20 that is attached to the retainer 3 of the door, a hollow seal portion 30 that is integrally formed with the mounting base 20 and elastically contacts the body panel 4, and the hollow seal of the mounting base 20. It is integrally formed on the vehicle outer side E from the portion 30 and has a substantially U-shaped cross section with an upper portion 12 and a lower portion 13 sandwiching a bent portion 11 formed at a substantially middle height portion. And an outer lip portion 10 in contact therewith.

  Further, a groove portion 14 is formed on the vehicle outer side E of the bent portion 11 of the outer lip portion 10, and a convex portion 15 is formed on the vehicle outer upper end portion of the lower portion 13, and when the door is closed, the convex portion 15 The vehicle outer surface of the upper portion 12 bent toward the vehicle outer side E is elastically contacted.

  This will be described with reference to FIG. 1 and FIGS. The low specific gravity door weather strip 1 according to claim 2 is a door weather strip for automobiles having a specific gravity of 0.2 to 0.5 (low specific gravity). The low specific gravity door weather strip 1 includes a mounting base 20 that is attached to the retainer 3 of the door, a hollow seal portion 30 that is integrally formed with the mounting base 20 and elastically contacts the body panel 4, and the hollow seal of the mounting base 20. It is integrally formed on the vehicle outer side E from the portion 30 and has a substantially U-shaped cross section with an upper portion 12 and a lower portion 13 sandwiching a bent portion 11 formed at a substantially middle height portion. And an outer lip portion 10 in contact therewith.

  Further, by forming a groove portion 14 and a concave portion 16 that bites into the lower portion 13 continuously to the groove portion 14 on the vehicle outer side E of the bent portion 11 of the outer lip portion 10, The lip-shaped convex part 15a which is a lip shape is provided. When the door is closed, the vehicle outer surface of the upper portion 12 bent toward the vehicle outer side E is brought into elastic contact with the lip-shaped convex portion 15a.

  Since the specific gravity of the low specific gravity door weather strip 1 according to claim 1 is 0.2 to 0.5, it is smaller than the specific gravity (0.5 to 0.7) of the door weather strip so far. The door weather strip 1 and the automobile to which it is attached can be reduced in weight.

  Further, by forming a groove portion 14 on the vehicle outer side E of the bent portion 11 of the outer lip portion 10, a convex portion 15 is formed on the vehicle outer upper end portion of the lower portion 13, and when the door is closed, Since the outer surface of the upper portion 12 bent to E is elastically contacted, excellent sound insulation and door closing properties can be obtained.

  That is, when the door is closed, the outer surface of the upper portion 12 is elastically contacted with the convex portion 15, so that the groove portion 14 is almost crushed by the elastic contact, and thereby the bent portion 11 that is thin due to the formation of the groove portion 14. Becomes thick. As a result, the entire outer lip portion 10 including the bent portion 11 forms a substantially wall-like wall structure that is substantially innocent, so that sound intrusion and leakage can be effectively prevented.

  Further, when the door is closed, the outer lip portion 10 can be easily elastically deformed with the bent portion 11 thinned by the formation of the groove portion 14 as a fulcrum, so that the reaction force that the outer lip portion 10 receives from the body panel 4 is reduced. small. Thereby, the outstanding door closing property can be exhibited.

  The low specific gravity door weather strip 1 according to the second aspect can reduce the weight as well as the sound insulation and door closing properties as in the first aspect of the invention.

  Further, a groove portion 14 and a concave portion 16 that bites into the lower portion 13 continuously from the groove portion 14 are formed on the vehicle outer side E of the bent portion 11 of the outer lip portion 10, and a lip-shaped convex portion is formed on the vehicle upper end portion of the lower portion 13. 15a is formed, and when the door is closed, the lip-shaped convex portion 15a is brought into elastic contact with the vehicle outer surface of the upper portion 12 bent toward the vehicle outer side E, so that the reaction force received by the outer lip portion 10 can be further reduced. This is because the lip-shaped convex portion 15a is lip-shaped and easily elastically deformed. Thereby, the door closing property can be further improved.

  Also, even when there is a build-up variation between the body panel 4 and the door panel 2, the lip-shaped convex portion 15a is lip-shaped and easily elastically deformed. Sound insulation and door closeability can be secured.

It is a side view which shows the motor vehicle which attached the door weather strip. The door weather strip which concerns on a prior art example is shown, and it is the XX sectional drawing of FIG. FIG. 9 is a sectional view taken along line XX of FIG. 1, showing a door weather strip according to another conventional example. The door weather strip which concerns on 1st embodiment of this invention is shown, and it is the XX sectional drawing of FIG. 1 (state at the time of a door opening). The door weather strip which concerns on 1st embodiment of this invention is shown, and it is the XX sectional drawing of FIG. 1 (state at the time of a door closed). It is a section lineblock diagram showing the door weather strip concerning a first embodiment of the present invention. The door weather strip which concerns on 2nd embodiment of this invention is shown, and it is the XX sectional drawing of FIG. 1 (state at the time of door opening). The door weather strip which concerns on 2nd embodiment of this invention is shown, and it is the XX sectional drawing of FIG. 1 (state at the time of a door closed). It is a section lineblock diagram showing the door weather strip concerning a second embodiment of the present invention.

  A first embodiment of a low specific gravity door weather strip 1 according to the present invention is shown in FIGS. 1 and 4 to 6. This is an automotive door weather strip having a specific gravity of 0.2 to 0.5, and includes a mounting base 20, a hollow seal portion 30, an outer lip portion 10, and a back lip 40.

  The attachment base 20 is attached in a fitted state to a retainer 3 having a substantially U-shaped cross section provided along the outer peripheral end of the door. The hollow seal portion 30 has a hollow shape integrally formed with the mounting base portion 20, and when the door is closed, its upper end portion elastically contacts the body panel 4 to seal that portion.

  The outer lip portion 10 is integrally formed on the vehicle outer side E from the hollow seal portion 30 of the mounting base portion 20, and is a cross section provided with an upper portion 12 and a lower portion 13 with a bent portion 11 formed at a substantially middle height portion therebetween. The shape is abbreviated. The upper end portion of the outer lip portion 10 elastically contacts the body panel 4 when the door is closed, and seals that portion.

  Further, the outer lip portion 10 is formed with a convex portion 15 at the upper end portion on the vehicle outer side of the lower portion 13 by the groove portion 14 formed on the vehicle outer side E of the bent portion 11. When the door is closed, the vehicle outer side surface of the upper portion 12 that is elastically contacted with the door panel 2 and bent toward the vehicle outer side E is elastically contacted with the convex portion 15.

  Note that the rear lip 40 protrudes obliquely upward from the lower end of the outer lip 10 on the outer side of the vehicle and elastically contacts the inner surface of the door panel 2 to ensure the sealability of that portion.

  Since the specific gravity of the low specific gravity door weather strip 1 according to the present embodiment having such a configuration is 0.2 to 0.5, it is compared with the specific gravity (0.5 to 0.7) of a normal door weather strip. small. Therefore, it is possible to reduce the weight of the door weather strip 1 and the automobile to which it is attached.

  Further, when the door is closed, the outer surface of the upper portion 12 is elastically contacted with the convex portion 15, so that the groove portion 14 is almost crushed by the elastic contact. The part 11 will be in a state like thickness. As a result, the entire outer lip portion 10 including the bent portion 11 forms a substantially wall-like wall structure, which effectively prevents sound intrusion and leakage and improves sound insulation. be able to.

  Further, when the door is closed, the outer lip portion 10 can be easily elastically deformed with the bent portion 11 thinned by the formation of the groove portion 14 as a fulcrum. Thereby, the reaction force which the outer lip part 10 receives from the body panel 4 at the time of door closing is small, Therefore A door can be easily closed with moderate force.

  A second embodiment of the low specific gravity door weather strip 1 according to the present invention is shown in FIGS. 1 and 7 to 9. The door weather strip 1 is characterized by a groove portion 14 on the vehicle outer side E of the bent portion 11 of the outer lip portion 10, a lower portion 13 continuous with the groove portion 14, substantially parallel to the vehicle outer surface and its base end A recess 16 that cuts in toward the side (the mounting base 20 side) is formed, and a lip-shaped convex portion 15a that is a lip shape is formed at the upper end of the lower portion 13 on the outside of the vehicle. This is because the vehicle outer surface of the upper portion 12 that is elastically contacted with the body panel 4 and bent toward the vehicle outer side E is elastically contacted with the portion 15a.

  Since the lip-shaped convex portion 15a is longer than the convex portion 15 in the first embodiment, the reaction force received by the outer lip when the door is closed can be further reduced. Therefore, the door closing property can be further enhanced.

  Further, even when a built-up variation occurs between the body panel 4 and the door panel 2, the body panel 4 can be brought into elastic contact with the lip-shaped convex portion 15a. That is, due to the occurrence of variations, for example, when the distance D between the door panel 2 and the body panel 4 is smaller than a predetermined dimension, the lip-shaped convex portion 15a is elongated and can be elastically deformed greatly. As a result, it is possible to effectively cope with variations in building and to exhibit excellent sound insulation and door closing performance.

  In the first embodiment and the second embodiment, the hollow seal portion 30 includes the inner wall portion 31 located on the indoor side G, the outer wall 32 located on the vehicle outer side E, and the tip portions of the inner wall portion 31. The inner wall portion 31 and the outer wall portion 32 are set to be thicker portions F that are thicker than the connecting wall portion 33 (see the hatched portions in FIGS. 6 and 9). . Thereby, the sound insulation is further enhanced. In addition, constricted portions W are formed at the base portions of the inner base portion 31 and the outer wall portion 32, respectively. By forming the thick portion F on the attachment base 20 side and forming the constricted portion W, the hollow seal portion 30 can be easily elastically deformed, and thus the door closing property can be improved.

  In the above two embodiments, the thickness T2 of the lower portion 13 of the outer lip portion 10 is set to be larger than the thickness T1 of the upper portion 12 (see FIGS. 6 and 9). As a result, when the door is closed, the upper portion 12 elastically contacting the body panel 4 is more easily elastically deformed, and the upper portion 12 is stabilized by the lower portion 13 which is thicker and more rigid. Can be supported. As a result, the entire outer lip portion 10 when the door is closed can be made into one lump (innocuous) wall structure, and thereby extremely excellent sound insulation can be exhibited.

  Further, when the door is closed, the lower portion 13 of the outer lip portion 10 is pressed by the upper portion 12 and moves to the vehicle outer side E to elastically contact the rear lip 40, whereby the outer lip portion 10 and the rear lip 40 are This constitutes one large lump (solid) wall structure. As a result, sound insulation can be further enhanced.

  Further, in the above two embodiments, the outer lip portion 10 is set to have a substantially U-shaped cross section (see FIGS. 4 and 7), and the upper portion 12 elastically contacts the body panel 4 when the door is closed. Therefore, it is set so as to be bent at substantially right angles with respect to the lower portion 13 to ensure a sufficient amount of elastic deformation (see FIGS. 5 and 8). Therefore, even when the distance D between the door panel 2 and the body panel 4 becomes larger than the set dimension due to the variation in building, the upper portion 12 can be reliably brought into elastic contact with the body panel 4. Thereby, the sound insulation which is not influenced by the variation in building can be obtained.

DESCRIPTION OF SYMBOLS 1 Door weather strip 2 Door panel 3 Retainer 4 Body panel 10 Outer lip part 11 Bending part 12 Upper part 13 Lower part 14 Groove part 15 Convex part 15a Lip-like convex part 16 Concave part 20 Mounting base 30 Hollow seal part 31 Inner wall part 32 Outer wall Part 33 Connecting wall part 40 Rear lip 50 Door weather strip 51 Mounting base part 52 Hollow seal part 53 Outer lip part D Distance between body panel and door panel E Outer side F Thick part G Indoor side T1 Upper part thickness T2 Lower part Wall thickness W Constriction

Claims (2)

  An automotive door weatherstrip having a specific gravity of 0.2 to 0.5, which is mounted on a door retainer (3), and is integrally formed with the mounting base, and a body panel (4) A hollow seal part (30) elastically contacting the upper part (between the hollow seal part (E) of the mounting base and the bent part (11) formed on the vehicle outer side (E) and formed at a substantially intermediate height part) 12) and an outer lip portion (10) elastically in contact with the body panel, and a groove portion (14) on the vehicle outer side of the bent portion of the outer lip portion. A convex portion (15) is formed at the upper end of the lower portion of the vehicle, and when the door is closed, the outer surface of the upper portion of the upper portion that is bent outward is elastically contacted with the convex portion. Features a low-specific gravity door weather strip.   An automotive door weatherstrip having a specific gravity of 0.2 to 0.5, which is mounted on a door retainer (3), and is integrally formed with the mounting base, and a body panel (4) A hollow seal part (30) elastically contacting the upper part (between the hollow seal part (E) of the mounting base and the bent part (11) formed on the vehicle outer side (E) and formed at a substantially intermediate height part) 12) and an outer lip portion (10) elastically in contact with the body panel, and a groove portion (14) on the vehicle outer side of the bent portion of the outer lip portion. And a concave portion (16) that bites into the lower portion continuously from the groove portion, a lip-shaped convex portion is provided at the upper end of the lower portion of the vehicle, and when the door is closed, the lip-shaped convex portion The upper part of the car bent outward Low specific gravity door weather strip, characterized in that for elastic contact to.

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