JP2013028211A - Weather strip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a weather strip which includes a mount base to be mounted on an opening/closing body such as the door and the trunk lid of an automobile or on a vehicle body, and a sealing part integrally formed on the mount base, and in which when the opening/closing body is closed, the sealing part is brought into elastic-contact with the vehicle body or with the opening/closing body to seal a space between the opening/closing member and the vehicle body, wherein sealing is more surely performed, even when the vehicle body or the opening/closing body in elastic contact with the sealing part has a step.SOLUTION: In a hollow sealing part 21 to be pressed to the contact surface of a door opening edge when a door is closed, two lines of projections 23 each made of highly foamed sponge that is softer and more easily deformed compared to the sealing part 21 are formed as protruding and in parallel with each other in a part to be in contact with the contact surface. When a step formed by stacking and welding of panels is present in the door opening edge, the projections 23 are pressed to the step to follow the step, preventing formation of a triangular gap between the step and the sealing part 21.

Description

  The present invention relates to a weather strip that seals between an opening / closing body such as an automobile door or a trunk lid and a vehicle body.

  A weatherstrip is attached to the weatherstrip, for example, around the door, and is attached to the doors opening edge of the car body that seals between the weatherstrip and the car door opening elastically when the door is closed. There are various weather strips, such as a weather strip that elastically contacts and seals with the door, and a weather strip that is attached to the opening edge of the trunk and seals with the trunk lid when the trunk lid is closed.

  Each of the weather strips is generally an opening / closing body such as a door or a trunk lid, or a mounting base that is attached to the vehicle body, and a seal portion that is integrally formed with the mounting base and elastically contacts the vehicle body or the opening / closing body when the opening / closing body is closed. However, when the seal part is elastically contacted with the vehicle body or the opening / closing body, a step, for example, a step at the welded portion when the panels are welded on top of each other, a thin wall when a portion requiring high rigidity is formed thick A step such as a step with the portion may be formed. FIG. 1 exemplifies a place where a step of a vehicle body is formed. The center pillar 1 has a step 2 by a thick portion, and lower hinge corners on the front and rear door opening edges 3 and 4. In order to reinforce the corner portion, a step formed at both ends of the reinforcing material when the reinforcing plates 5 and 6 as shown in the figure are attached (in FIG. 1, formed by the ends of the horizontal portions of the reinforcing plates 5 and 6). Only the stage 7 is shown).

  When the door is closed at the door opening edge portions 3 and 4 and the seal portion of the weather strip attached around the door hits the steps 2 and 7, the seal portion 9 and the vehicle body 10 are formed as shown in FIG. A triangular gap 11 is generated between the first and second steps 2 and 7, which results in insufficient sealing.

  In order to solve this problem, a weather strip is disclosed in which the surface layer portion of the seal portion that elastically contacts the vehicle body or the opening / closing body when the opening / closing body is closed has a low-density high-foam sponge rubber layer (Patent Document 1).

JP-A-60-193745

  The present invention includes an opening base such as a door or a trunk lid of an automobile or a mounting base attached to the vehicle body, and a seal portion integrally formed with the mounting base, and when the opening and closing body is closed, the seal portion is the vehicle body or In a weather strip that elastically contacts the opening / closing body and seals between the opening / closing body and the vehicle body, sealing can be performed more reliably even if the vehicle body or the opening / closing body to which the seal portion elastically contacts has the above-described step. Is.

  The invention according to claim 1 includes a mounting base attached to either one of an opening / closing body such as an automobile door or a trunk lid or a vehicle body, and a seal portion integrally formed on the mounting base, and the opening / closing body is closed. In a weather strip in which the seal portion elastically contacts the other of the vehicle body or the opening / closing body and seals between the opening / closing body and the vehicle body, the vehicle body or the opening / closing body to which the seal portion elastically contacts when the opening / closing body is closed A step that is concave toward the direction away from the seal portion is formed, and the seal portion that is pressed against the step is made of a highly foamed sponge material that is different from the seal portion, and is softer and more easily deformed than the seal portion. One or a plurality of protrusions are formed in a certain length in the longitudinal direction of the seal portion, and are elastically contacted across the step when the opening / closing body is closed.

  The invention according to claim 2 is characterized in that, in the invention according to claim 1, the projection is formed over the entire length in the longitudinal direction of the seal portion.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the opening / closing body is a door, the weather strip is attached around the door, the seal portion is hollow, and the door is closed. The contact portion that contacts the door opening edge of the vehicle body changes depending on the position of the door opening edge, and the protrusion is formed at the contact portion and is pressed against the door opening edge when the door is closed. And

  The invention according to claim 4 is the invention according to claim 3, wherein the protrusion is formed by variable extrusion.

  The invention according to claim 5 is the invention according to any one of claims 1 to 4, characterized in that the seal portion is covered with a surface layer member made of a highly foamed sponge material made of the same material as the protrusion. To do.

  The invention according to claim 6 is the invention according to any one of claims 1 to 5, characterized in that the surface of the protrusion is exposed by breaking bubbles.

According to the first aspect of the present invention, when the opening / closing body is closed, the projection made of the highly foamed sponge material formed on the seal portion of the weather strip is pressed against the step of the vehicle body or the opening / closing body. At this time, the protrusions are crushed in response to the concentration of reaction force when pressed against the vehicle body or the opening / closing body, making it easier to follow the step, eliminating the triangular gap at the step, and improving the sealing performance. . The sealing portion in the case where only the protrusions are formed by highly foamed sponge material, it is possible to reduce the amount of highly foamed sponge material than to form a surface layer portion whole of the seal portion at a high foam sponge material with protrusions .

  According to the second aspect of the present invention, the protrusion is pressed against the step regardless of the portion of the seal portion in the longitudinal direction, and the above-described sealing performance is improved. In addition, since the protrusion is formed over the entire length of the seal portion, and the longitudinal end surface of the protrusion does not form a step with the seal portion, a triangular gap is not formed between the seal portion and the protrusion in the longitudinal end portion. The sealing performance is not impaired.

  According to the invention relating to claim 3, the seal portion elastically contacting the door opening edge of the vehicle body changes from the vehicle inner side surface toward the vehicle outer side surface as the contact location with the door opening edge portion approaches the door hinge portion. Since the protrusion is also formed at the contact part of the seal part, the protrusion hits the step no matter where the door opening edge is located, thereby eliminating the triangular gap at the step and improving the sealing performance Can be made.

  According to the fourth aspect of the present invention, the weather strip can be manufactured with high productivity by changing the formation position of the projection by variable extrusion molding.

  According to the invention according to claim 5, since the surface layer member covering the seal portion is formed of the high foamed sponge together with the protrusion, the protrusion is formed on the vehicle body or the opening / closing body when the seal portion elastically contacts the door opening edge when the door is closed. Seals with a smooth surface by following the formed step well, thereby eliminating the triangular gap at the step where the seal portion hits, improving the sealing performance, and forming the surface of the surface layer to be fuzzy A weather strip with a design that is significantly different from the surface can be obtained. Further, the present invention produces the same effect as described above when applied not only to the step intersecting the seal portion but also to the step parallel to the seal portion.

  According to the sixth aspect of the invention, the sealing performance is further improved by forming the surface of the protrusions in such a form that the bubbles are broken and exposed.

The perspective view of a part of vehicle body side surface provided with the door opening edge part of the front side and the rear side. The figure which shows the state in which the triangular gap was formed by the seal part pressed on the step. A side view of an automobile. The figure which shows the positional relationship of the weather strip and a reinforcement board at the time of a door closing. Sectional drawing of the weather strip in the AA line of FIG. 3, the CC line of FIG. 4, and the EE line of FIG. Sectional drawing of the weather strip in the BB line of FIG. 3, the DD line of FIG. 4, and the FF line of FIG. The perspective view of the principal part of the weather strip which formed the processus | protrusion in the seal part. The perspective view of the principal part of the weather strip which formed the protrusion of another aspect in the seal | sticker part. Sectional drawing in the GG line of the weather strip shown to the AA line of FIG. 3 and FIG. Sectional drawing in the BB line of FIG. 3 and the HH line of FIG. 8 similarly. Sectional drawing in the II line | wire of FIG. 1 with which the protrusion of the seal part was pressed on the step at the time of a door closing. The perspective view of the principal part of the weather strip of another aspect which formed the processus | protrusion in the seal part. Sectional drawing in the AA line of FIG. 2, the JJ line | wire of the weather strip shown in FIG. 1, and the KK line | wire of FIG.

A weather strip according to an embodiment of the present invention will be described below with reference to the drawings. In the figure, the same reference numerals are assigned to the same structural portions.
In the automobile shown in FIG. 3, a reinforcing plate 5 as shown in FIG. 4 is attached to the hinge-side lower corner at the door opening edge 3 on the front side of the vehicle body 10 shown in FIG. Panels and steps 7 and 8 constituting the vehicle body 10 are formed at the end and the vertical portion end.

  A weather strip, which will be described later, is attached to each of the front door 13 and the rear door 14 which are opening / closing bodies. The weather strip is elastically brought into contact with the door opening edge of the vehicle body when the doors 13 and 14 are closed. ing.

  5 shows a weather strip 16 attached to the lower side among the weather strips attached to the front door 13, taken along line AA in FIG. 3, line CC in FIG. 4, and line EE in FIG. FIG. 6 is a cross-sectional view of the weather strip 16 near the door hinge taken along line BB in FIG. 3, line DD in FIG. 4, and line FF in FIG. The weather strip 16 is mounted on the door inner panel 17 with a clip (not shown), a double-sided adhesive tape, or the like, and has a hollow mounting base 18 projecting from the mounting base 18. When the door is closed, the door opening edge of the vehicle body shown in FIG. It is composed of a hollow seal portion 21 that elastically contacts and seals the portion 3 and a seal lip 14 that elastically contacts the door inner panel 17, and is an extrusion-molded product, such as rubber such as EPDM or thermoplastic elastomer, etc. It is more formed.

  When the door 21 is closed, the contact portion a that contacts the door opening edge portion 19 is displaced to the vehicle outer side as it reaches the vicinity of the door hinge as shown in FIGS. FIG. 7 shows a protrusion 23 made of a highly foamed sponge made of a material different from that of the portion 21, for example, EPDM having a specific gravity of 0.04 to 0.5, and formed of a highly foamed sponge rubber that is softer and easier to deform than the seal portion 21. As described above, two protrusions are formed in the longitudinal direction of the weather strip along the contact location a.

  As shown in FIG. 4, the formation position of the protrusion 23 changes according to the change of the contact location a of the seal portion 21 that contacts the door opening edge 3. That is, as shown in FIG. 4, the protrusion 23 formed on the inner side of the seal portion 21 is displaced toward the outer side of the vehicle as it approaches the door hinge, and is formed on the side facing the mounting base 18. The portion where the formation position of the projection 23 changes can be formed by molding a weather strip provided with the portion, or just after the string-like one forming the projection 23 is extruded and also extruded. Although it can be formed by displacing the string-like material forming the projections 23 in the circumferential direction of the seal portion 21 when being stuck to the weather strip, it is preferable that the extruder is used when the weather strip 16 is extruded. Of the plurality of attached bases, the base 23 is formed by variable extrusion that slides the base that pushes the projection 23 portion. In the case of variable extrusion, it can be produced with higher productivity than the other methods described above.

  As described above, when the projection 23 is displaced in the position where the projection 23 is formed, the projection 23 is formed at the contact location a with the door opening edge 3 of the seal portion 21, so that the projection 23 can be located at any position in the longitudinal direction when the door is closed. It always hits the door opening edge 3 and is elastically contacted.

  Therefore, as shown in FIG. 5 and FIG. 6, a step 7 that intersects the longitudinal direction of the weather strip 16 at any location of the door opening edge 3, for example, a step formed at a location where a panel is overlapped and welded, a part thereof. Even if there is a step at the end of the thick portion formed by increasing the thickness, the protrusion 23 is always pressed against the step 7 when the door is closed.

  FIG. 8 shows another aspect of the projection formed on the weather strip, and FIG. 9 shows a portion corresponding to the GG line of the weather strip 21 shown in FIG. 8 and the AA line of FIG. 10 is a cross-sectional view corresponding to the line H-H in FIG. 8 and the line B-B in FIG. 3, respectively. The weather strip 31 is formed from at least the A-A line in FIG. Between the lines, a pair of protrusions 23a and 23b are formed on the inner side and the outer side of the vehicle, respectively, so as to protrude in parallel with each other in the longitudinal direction of the weather strip 31, and the weather strip 31 is continuous in the same cross section. I am doing. A large number of the protrusions 23a and 23b may be formed in the circumferential direction of the seal portion 21, for example, so as to form a saw blade shape in cross section.

As shown in FIG. 8, when a pair of protrusions 23a and 23b are formed on the inner side and the outer side of the seal portion 21, respectively, when the door is closed, one of the protrusions 23a and 23b hits the door opening edge 3 and is elastic. Touched. Therefore, as shown in FIG. 9 or FIG. 10, among the steps formed in the door opening edge 3, at least a step 7 that intersects the longitudinal direction of the vehicle inner side surface and the vehicle outer side surface of the seal portion 21, for example, a panel is overlapped. Even if there is a step formed at the welded part and a step at the end of the thick part formed by thickening a part, the projections 23a and 23b are always pressed against the step 7 when the door is closed. become.

  As described above, the projections 23, 23a, 23b are formed of a highly foamed sponge material, which is different from the seal portion 21, and are softer than the seal portion 21 and are easily deformed, and when pressed against the door opening edge 3 when the door is closed. Since the reaction force concentrates on the projections 23, 23a, 23b, the projections 23, 23a, 23b are easily deformed and crushed. Therefore, as shown in FIG. Such a triangular gap 11 does not occur, and a lack of sealing does not occur.

  The projections 23, 23a and 23b shown in the figure have a substantially triangular cross section, but may have a substantially semicircular cross section or a substantially rectangular cross section. Further, if the surface of the projections 23, 23a, 23b made of a highly foamed sponge is exposed by breaking the bubbles on the surface by a method as described later, for example, the triangular gap 11 shown in FIG. Is less likely to occur and is desirable.

  The weather strip 34 shown in FIG. 12 has a specific gravity of 0. Similar to the high-foam sponge made of a material different from that of the seal portion 35, for example, the projection 23 of the above-described embodiment. A two-layer structure covered with a surface layer member 36 formed of high foamed sponge rubber made of EPDM of 04 to 0.5 is used, and the surface layer member 36 is provided with a protrusion 23 having the same material and shape as the protrusion 23 shown in FIG. 7 is formed in the same manner as the weather strip 16 shown in FIG.

  In order to make the surface of the surface layer member 36 and the projection 23 made of a highly foamed sponge material covering the seal portion 35 fluffy, for example, buffing, peeling processing, a highly water-absorbing resin such as a modified acrylic cross-linked polymer is used. A method of laminating a compound obtained by adding water-containing hydrogel to a rubber material on the surface of the seal portion 35 to volatilize water by vulcanization and foaming the rubber material (Japanese Patent Laid-Open No. 2007-160789) or thermal expansion The method can be carried out by a method of encapsulating a functional microcapsule in a rubber material and thermally expanding at the time of vulcanization to destroy the capsule shell wall (Japanese Patent Laid-Open No. 2008-55976), but is not limited to these methods.

  As the method of forming the projections 23 on the surface layer member 36, the method described in the above paragraph 0025, that is, the method of molding a portion where the formation position of the projections 23 changes, the string-like one forming the projections 23 is extruded. In addition to being able to use a method of forming the string-like material forming the projections 23 when displaced on the weatherstrip just after being displaced in the circumferential direction of the seal portion 35, a variable extrusion method, etc. Unlike the method shown in FIG. 12, the protrusion 23 does not protrude from the surface layer member 36, but a method of digging grooves on both sides of the protrusion may be used. The protrusion 23 can be formed, and the method of digging the groove may be formed at the time of extrusion molding, or may be formed on the weather strip after extrusion by machining. It may be formed by lost by heat rays such as Heather rays.

  According to the present embodiment, since the surface layer member 36 formed to cover the seal portion 35 is formed of the high foamed sponge together with the protrusions 23, the seal portion 35 elastically contacts the door opening edge portions 3 and 4 when the door is closed. When (FIG. 13), the projection 23 follows the steps 2, 7, and 8 shown in FIG. 11 well, and the steps 2, 7, and 8 do not produce the triangular gap 11 as shown in FIG. Nor. Further, the surfaces of the surface layer member 35 and the projections 23 made of a highly foamed sponge have a fuzzy shape, thereby exhibiting a design surface that is greatly different from that of a conventional seal portion having a smooth surface.

  In addition, it is desirable that the surface of the protrusion 23 has a fluffy form in which bubbles are broken and exposed as described above. By doing so, the sealing performance is further improved.

  In the present embodiment, the present invention is applied not only to the case where the steps 2, 7, and 8 are formed in a direction intersecting with the seal portion 35, but also to the case where the steps are formed parallel to the seal portion 35. However, the surface layer member 36 of the highly foamed sponge material formed so as to cover the seal portion 35 follows the step well, and the same sealing effect can be obtained.

  In the above embodiment, the weather strips 16, 31, and 34 attached around the door of the front door 13 are shown. However, the weather strip attached around the door of the rear door 14 is configured in the same manner as the weather strips 16, 31, and 34. Also, at the door opening edge 4 on the rear side, a reinforcing plate 6 similar to the reinforcing plate 5 is attached to the lower corner on the hinge side (see FIG. 1).

  In the weather strip of each of the embodiments described above, the protrusion 23 made of a highly foamed sponge is formed on the seal portion of the lower weather strip below the belt line, or the surface layer member 36 formed so as to cover the seal portion 35 is made of the highly foamed sponge. The protrusions 23a and 23b are formed on the surface of the surface layer member 36 made of a highly foamed sponge material. However, the sealing portion of the weather strip on the roof line on the belt line is also the above embodiment. For example, a weather strip seal portion attached to a door opening edge of a vehicle body and a weather strip seal portion attached to an opening edge of a trunk can be similarly constituted.

  Moreover, although the seal part of each said embodiment has comprised the hollow shape, a lip | rip shape may be sufficient. Even in the lip-shaped seal portion, the protrusion 23 is formed on the surface, a surface layer member made of a highly foamed sponge material is formed on the surface, or protrusions 23a and 23b are formed on the surface of the surface layer member made of a highly foamed sponge material. By doing so, the same effects as in the above embodiment can be obtained.

2, 7, 8, ··· steps 3, 4, ··· door opening edges 5, 6 · · reinforcing plate 10 · · vehicle body 13 · front door 14 · rear doors 16, 21, 31, 34 · · weatherstrip 17 · -Door inner panel 18-Mounting base parts 21, 35-Hollow seal parts 23, 23a, 23b-Projections

Claims (6)

  A mounting base 18 attached to either one of an opening / closing body such as a door or a trunk lid of an automobile or a vehicle body, and a seal portion 21, 35 formed integrally with the mounting base 18, and when the opening / closing body is closed, the seal portion In weather strips 16, 21, 31, 34 in which 21, 35 elastically contacts the other of the vehicle body or the opening / closing body and seals between the opening / closing body and the vehicle body, when the opening / closing body is closed, the seal portion 21, Steps 2, 7, and 8 that are concave toward the direction away from the seal portion are formed on the vehicle body or the opening / closing body that elastically contacts with the seal portion 21, and the seal portions 21 and 35 pressed against the steps 2, 7, and 8 The seal portions 21 and 35 are made of a highly foamed sponge material, and one or a plurality of protrusions 23, 23 a, 23 b that are softer and easier to deform than the seal portions 21, 35 are formed on the seal portions 21, 35. Hand direction is formed a predetermined length, when closing the opening and closing member, the weather strip, characterized in that contact the stepped 2,7,8 elastically.   The weather strip according to claim 1, wherein the protrusions (23, 23a, 23b) are formed over the entire length of the seal portions (21, 35).   The opening / closing body is a door 13, 14, the weather strips 16, 21, 31, 34 are attached around the door, the seal portions 21, 35 are hollow, and when the door is closed, the door of the vehicle body The contact location a that contacts the opening edges 3 and 4 changes depending on the position of the door opening edges 3 and 4, and the protrusion 23 is formed at the contact location a so that the door opening edges 3 and 4 are closed when the door is closed. 3. The weather strip according to claim 1, wherein the weather strip is pressed against the weather strip.   The weather strip according to claim 3, wherein the protrusions (23, 23a, 23b) are formed by variable extrusion.   The weather strip according to any one of claims 1 to 4, wherein the seal portion (35) is covered with a surface layer member (36) made of a highly foamed sponge material made of the same material as the protrusion (23).   The weather strip according to any one of claims 1 to 5, wherein the surfaces of the projections 23, 23a, 23b are exposed by breaking bubbles.