JP2007314153A - Weather strip - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a weather strip capable of enhancing a following property to the bend. <P>SOLUTION: The weather strip 3 comprises a mounting base part 3s to be mounted along a vehicular door opening peripheral edge 1 thereon by clips C, and a hollow seal part 3p integrally coupled with a substantially center part in the width direction of the mounting base part 3s. A portion L having considerably low rigidity (for example, two slits S1 arranged in the longitudinal direction) is formed in a part of the longitudinal direction of the mounting base part 3s and in the substantially center part of the width direction so that a part of the longitudinal direction of the mounting base part 3s easily follows the bend in the plane including the same. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a weatherstrip that is attached to a vehicle opening perimeter along the periphery of a vehicle by a clip.

  A weather strip is attached to the periphery of the door opening of the automobile body to seal the space between the door. FIG. 4 shows a weather strip that seals between the front door, and FIG. 4B shows an example of attaching the weather strip 3 along the line AA in FIG. The strip 3 includes an attachment base 3s attached to the body panel 5 and a hollow seal portion 3p that protrudes from the attachment base 3s and elastically contacts the door inner panel 2 when the door is closed. The attachment to the body panel 5 is a flange. When the retainer is not set, the clip C is used as shown in FIG. In the figure, reference numeral 3l denotes a seal lip that elastically contacts the body panel 5 and seals between the body panels 5. Further, the attached portion will be described. K in FIG. 4C is a clip hole.

  That is, when the weather strip 3 is bent in the plane including the rigid mounting base 3s, for example, the radius of curvature below the hinge shown in FIG. Since the portion on the side of the seal lip 3l receives a large pulling force due to the difference in the circumferential length from the center line CL, it cannot follow the small bend (with a radius of curvature). There is a problem that the door opening peripheral portion 1 is lifted from the body panel 5 and the sealing performance is impaired. As a countermeasure, this part can be made into a molded product, but this involves a great increase in cost. In addition, the mounting base 3s does not bend between the clips C even at a bent portion having a large radius of curvature, and the weather strip 3 should be originally attached between the clips C and C as shown in FIG. There is a problem that it may be attached (short circuit) at the position of a solid line that is more short-circuited, which also impairs the sealing performance.

  As described above, the weather strip 3 has a long length so as to be able to cover the entire length of the door opening peripheral portion 1 whereas the rigidity of the mounting base portion 3s has the above-mentioned problems. Therefore, if the rigidity is too small, the shape is not stable upon assembly, and there is a complaint that positioning and other handling during assembly are difficult. For example, simply reducing the rigidity does not solve the problem.

  In view of the above, the present invention is a weather strip that can easily follow the bending of a small radius of curvature in the longitudinal direction and eliminates the drawbacks of the prior art described above, and is easy to handle during assembly. Is to provide.

  In order to achieve the above object, the invention according to claim 1 is the mounting base (3s) attached by the clip (C) along the door opening peripheral part (1) of the vehicle, and the width direction of the mounting base (3s). A weather strip (3) integrally joined to a substantially central portion and having a hollow seal portion (3p) elastically contacting the door inner panel (2) or the body panel (5) when the door is closed, the mounting base (3s) A portion of the mounting base portion (3s) in the longitudinal direction, a portion having a remarkably low rigidity in the substantially central portion in the width direction (so that the portion in the longitudinal direction can easily follow the in-plane bending including the portion ( L) is formed.

  In the invention of claim 2, in addition to the configuration of the invention of claim 1, the portion (L) having extremely low rigidity is formed by hollowing out part thereof.

  According to a third aspect of the invention, in addition to the configuration of the first aspect of the invention, the portion (L) having a remarkably low rigidity is formed by replacement with a high foamed sponge portion (Hs) having a high degree of foaming.

  According to the first aspect of the present invention, when the weather strip is attached to the body panel 5 of the door opening peripheral portion 1, the width direction of the attachment base portion of the weather strip is substantially at the center in the width direction. The restraining force on the both sides in the width direction of the mounting base by the formed portion having extremely low rigidity, that is, the compressive force and the pulling force caused by the in-plane bending of the body panel 5 are reduced. The mounting base can flexibly follow the bending of a small radius of curvature in the surface of the body panel 5, for example, the problem that the above-mentioned lip portion is lifted and the sealing performance is impaired is also eliminated. The In addition to this, even when the bending has a large curvature radius, the mounting base can be flexibly bent without short-circuiting (short-circuiting) between the clips, so that the sealing performance is not impaired.

  Further, when the weather strip is attached to the door inner panel 2 of the door opening peripheral portion 1, the same effect as that when the weather strip is attached to the body panel 5 is produced.

  According to the invention of claim 2, in addition to the effect of the invention of claim 1, a part of the mounting base (for example, formation of slits, holes, etc.) is arbitrarily and easily performed after its manufacture. And the associated cost increase is negligible. In addition, since the portion where the rigidity is reduced is limited to a part in the longitudinal direction of the mounting base, most of the attachment base is large in rigidity and stable in shape, positioning and other obstacles during assembly. Never came.

According to the invention of claim 3, in addition to the effect of the invention of claim 2, it is very easy in the extrusion molding to replace a part of the mounting base part with the high foaming sponge part.
Here, the highly foamed sponge part is a part formed with a specific gravity of 0.1 to 0.3.

  An example of a weatherstrip according to the best mode for carrying out the present invention will be described with reference to FIGS. 1 to 3. The basic configuration is the same as that of the conventional example shown in FIG. Corresponding parts are denoted by the same reference numerals. That is, 3s is a mounting base having a high specific gravity (for example, a specific gravity of 1.1 to 1.3) and high rigidity, and is attached by the clip C along the body panel 5 of the door opening peripheral portion 1 of the vehicle. 3p is a hollow seal portion having a small specific gravity (for example, a specific gravity of 0.4 to 0.6) and a low rigidity, and is integrally coupled to the mounting base portion 3s in the substantially central portion in the width direction to close the door inner panel 2. And the inner surface of the door panel and the body panel 5, that is, the door opening peripheral portion 1 is sealed.

  Further, 3l is a sponge-like seal lip having a specific gravity as small as that of the sponge portion 3P and having a low rigidity, and the entire length of one side of the mounting base 3s so as to elastically contact the body panel 5 of the door opening peripheral portion 1. Are bound together.

  Here, the characteristic portion will be described. A part of the attachment base 3s in the longitudinal direction of the attachment base 3s having a large rigidity can easily follow a bending in an in-plane including the attachment base 3s. A portion L having a remarkably low rigidity is formed at a substantially central portion in the width direction. In order to significantly reduce the rigidity, it is effective to mechanically blow out a part thereof or to chemically foam it.

  First, two examples in which a part is mechanically hollowed out will be described with reference to FIGS. 1 and 2, respectively. FIG. 1 shows a part of the mounting base 3s in the longitudinal direction, in which two slits Sl are arranged in the longitudinal direction at a substantially central part in the width direction. This may be regarded as a bridge provided in the width direction at the midpoint of one slit. With the above configuration, a portion L having a remarkably low rigidity is formed in a part in the longitudinal direction of the mounting base 3s and substantially in the center in the width direction.

  FIG. 2 shows a part of the mounting base 3s in the longitudinal direction, in which a plurality of circular holes Ch are arranged in the longitudinal direction at substantially the center in the width direction. This may also be regarded as a single slit provided with a plurality of bridges (although the width varies) at equal intervals in the longitudinal direction. Also with the above configuration, a part L having a remarkably low rigidity is formed in a part in the longitudinal direction of the mounting base 3s and substantially in the center in the width direction. 1 and 2 can be easily formed at an arbitrary position after the weather strip 3 is manufactured, and the accompanying cost increase is also small.

  FIG. 3 shows a part in the longitudinal direction of the mounting base 3s, that is, a substantially central part in the width direction, replaced with a highly foamed sponge part Hs having a higher degree of foaming than the hollow seal part 3p. Also with the above configuration, it is possible to form a portion L with extremely low rigidity at a part in the longitudinal direction of the mounting base 3s and at a substantially central portion in the width direction. However, this is different from the one shown in FIGS. 1 and 2 and can be formed very easily by extrusion at the time of manufacture, not after the opening strip 3 is manufactured.

  Explaining the operation, in both cases, the portions on both sides in the width direction of the mounting base 3s are formed by portions L having a remarkably low rigidity formed in a substantially central portion in the width direction to a part in the longitudinal direction of the mounting base 3s. , That is, the compressive force and the pulling force generated by the bending in the plane including the same are reduced, so that the mounting base 3 s can be applied to the bending with a small radius of curvature in the plane including the same. For example, the problem that the sealing lip portion S1 is lifted and the sealing performance is deteriorated can be solved.

  Not only that, but also for bending with a large radius of curvature, the mounting base 3s can bend flexibly without short-circuiting (short-circuiting) between the clips C, so that the sealing performance is not impaired. . The portion L whose rigidity is reduced by punching is limited to a part in the longitudinal direction of the mounting base 3s. Therefore, most of the portions are large in rigidity and stable in shape even when assembled. It will not interfere with the handling of time.

It is an expanded view which shows the 1st embodiment of this invention. It is an expanded view which shows the 2nd embodiment of this invention. It is an expanded view which shows the 3rd embodiment of this invention. (A) is a front view showing the state of attachment of the weather strip, (b) is a sectional view taken along the line AA, (c) is a development view showing the conventional example, and (d) A showing the problems of the conventional example. It is -A sectional drawing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Door opening peripheral part 2 Door inner panel 3 Weather strip 3l Seal lip 3p Hollow seal part 3s Mounting base part 5 Body panel C Clip Ch Circular hole CL Center line Hs High foaming sponge part K Clip hole L The part where rigidity is remarkably low Sl

Claims (3)

A mounting base that is attached to the vehicle opening periphery by a clip along a peripheral edge portion of the vehicle, and a hollow seal portion that is integrally coupled to a substantially central portion in the width direction of the mounting base and elastically contacts the door inner panel or the body panel when the door is closed. A weatherstrip,
A part of the mounting base part in the longitudinal direction that can easily follow bending in the plane including the mounting base part, a part of the mounting base part in the longitudinal direction, a substantially low part in the width direction thereof, a portion having extremely low rigidity A weather strip characterized by being formed. The weather strip according to claim 1, wherein the portion having extremely low rigidity is formed by hollowing out a part thereof. The weather strip according to claim 1, wherein the portion having extremely low rigidity is formed by replacement with a highly foamed sponge portion having a high degree of foaming.

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