Door weather strip

Abstract

To provide a door weather strip which can prevent deterioration of sealing performance by providing protrusions at the outside opening edges of slits provided in a base bottom section of a mounting base section, enhancing rigidity of the opening edges of the slits and suppressing mouth opening deformation of the slit opening edges when a door is closed.SOLUTION: A door weather strip includes a mold molding section 11b having a mounting base section 22 mounted in an inner panel 3a provided in a front door and a hollow seal section 23 which is provided integrally with a mounting base section and is brought into elastic contact with a vehicle body panel 6 when a door is closed. Three slits 28 to 30 are divided and formed in a longitudinal direction in a base bottom section 26 abutting on an inner panel of the mounting base section. Each one pair of protrusion sections 31 to 33 along the longitudinal direction are provided at outside opening edges 28a to 30a of the three slits, and thereby rigidity of each outside opening edge is enhanced and mouth opening deformation is suppressed.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a door weather strip that is attached to a door panel, such as a front door or rear door, of an automobile to provide a seal between the door panel and a body panel at an opening in the body. [Background technology]

[0002] A conventional door weather strip is known from Patent Document 1 below.

[0003] FIG. 1 is an oblique view of an automobile front door to which the present invention and a conventional door weatherstrip are applied, viewed from the inside; FIG. 2 is a schematic diagram showing the general configuration of the door weatherstrip; FIG. 7 is an oblique view of the conventional door weatherstrip viewed from the mounting surface side in the molded portion; and FIG. 8 is a cross-sectional view taken along line AA in FIG. 1, showing the deformation state of the conventional door weatherstrip when the door is closed.

[0004] As shown in FIG. 1, the front door 1 of an automobile has a door body 2 capable of accommodating a door glass G, and a sash portion 3 integrally formed at the upper end portion of the door body 2. A door weather strip 11 is disposed on the inner surface of the outer periphery of the door body 2 and the sash portion 3.

[0005] The door body 2 is provided therein with an elevator 5 that raises and lowers the door glass G in the vertical direction to open and close it. As shown in Fig. 8, the sash portion 3 is formed by joining an end portion of an inner panel 3a on the vehicle inside side and an end portion of an outer panel 3b on the vehicle outside side by a hemming flange portion 3c through a hemming process.

[0006] As shown in Fig. 2, the door weatherstrip 11 is formed in an endless ring shape by an extrusion molded portion 11a arranged on a straight portion of the front door 1 and a molded portion 11b arranged on a corner portion or the like of the front door 1. As shown in Fig. 8, the door weatherstrip 11 includes a mounting base 12 that is fixed to the inner panel 3a of the sash portion 3 by a mounting clip (not shown), and a hollow seal portion 13 that is integral with the outer end portion of the mounting base 12 and elastically contacts the vehicle body panel 6 (body side outer panel) when the door is closed.

[0007] The molded portion 11b is designed so that the mounting base 12 and hollow seal portion 13 are molded using a core of a mold molding machine (not shown), and as shown in Fig. 7, three slits 14, 15, 16 are formed in the base portion 12a of the mounting base 12 for removing the core that remains inside the molded product when demolding. These three slits 14-16 are formed by dividing the base portion 12a at the center position in the width direction along the longitudinal direction, and by dividing the base portion 12a in this manner, it is possible to eliminate the need to bond the adjacent slits 14-16 with an adhesive. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Patent No. 4140522 (Figure 6) Summary of the Invention [Problem to be solved by the invention]

[0009] However, in order to form the three divided slits 14 to 16, the core of the mold molding machine must be divided into three pieces, rather than a single piece as in the past. Therefore, since the strength of each core is lower than that of a single core, in order to ensure this strength, the wall thickness of each core must be made thicker than that of a single core.

[0010] In that case, the slits 14-16 for removing each of the cores must be formed with a large width W of each of the openings 14a-16a, which reduces the rigidity of the opening edges 14b-16b around each of the openings 14a-16a.

[0011] 8, when the mounting base 12 attached to the inner panel 3a is compressed and deformed by the hollow seal portion 13 elastically contacting the vehicle body panel 6 at the vehicle body opening when the front door 1 is closed, the opening edges 14b-16b of the slits 14-16 may open in a V-shape in cross section due to the pressure (thick white arrows) generated during deformation. As a result, the support rigidity of the base portion 12a of the mounting base 12 for the hollow seal portion 13 decreases, and the sealing pressure of the hollow seal portion 13 for the vehicle body panel 6 when the door is closed decreases, and the sealing pressure between the base portion 12a of the mounting base 12 and the inner panel 3a also decreases, which may deteriorate the overall sealing performance.

[0012] The present invention has been devised in consideration of the technical problems of the conventional technology, and aims to provide a door weather strip that has a protrusion on the outer opening edge of the slit at the base of the mounting base to increase the rigidity of the opening edge of the slit, thereby suppressing deformation of the opening edge of the slit when the door is closed, and thereby suppressing a decrease in sealing performance. [Means for solving the problem]

[0013] The present invention is a door weather strip having a molded portion equipped with a mounting base to be attached to a door panel of a vehicle door, and a hollow seal portion that is integral with the mounting base and elastically contacts the vehicle body panel when the door is closed, and is characterized in that a plurality of slits are formed and divided along the longitudinal direction in the base portion of the mounting base that abuts against the door panel, and a protrusion is provided on the outer opening edge of at least one of the slits. Effect of the Invention

[0014] According to the present invention, the protrusion increases the rigidity of the opening edge of the slit, so that deformation of the opening of the slit when the door is closed can be sufficiently suppressed. As a result, the support rigidity of the hollow seal part of the mounting base is increased, and the sealing pressure of the hollow seal against the vehicle panel and the sealing pressure of the base part of the mounting base against the door panel are increased, improving the overall sealing performance. [Brief description of the drawings]

[0015] [Figure 1] 1 is a perspective view of a front door of an automobile to which the present invention and a conventional door weather strip are applied, as viewed from the inside. [Diagram 2] FIG. 2 is a schematic diagram showing a schematic configuration of a door weather strip. [Diagram 3] FIG. 2 is a bottom view of a molded portion of the embodiment of the door weather strip according to the present invention. [Figure 4] 2 is a cross-sectional view taken along line AA in FIG. 1, showing an embodiment of a door weather strip according to the present invention. [Diagram 5] 2 is a cross-sectional view taken along line AA in FIG. 1, illustrating a deformation state of the door weather strip of the present embodiment when the door is closed. [Figure 6] 1 is a cross-sectional view showing a state in which the door weather strip of the present embodiment is attached to an inner panel by a mounting clip. [Figure 7] FIG. 11 is a perspective view of a conventional door weather strip as viewed from the bottom side of the base portion of the mounting base in the molded portion. [Figure 8] 2 is a cross-sectional view taken along line AA in FIG. 1, showing a deformation state of a conventional door weather strip when the door is closed. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

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

[0017] Figure 3 is a bottom view of the molded portion of an embodiment of the door weatherstrip of the present invention, Figure 4 is a cross-sectional view taken along line AA in Figure 1 showing the door weatherstrip of this embodiment, Figure 5 is a cross-sectional view taken along line AA in Figure 1 showing the deformation state of the door weatherstrip of this embodiment when the door is closed, and Figure 6 is a cross-sectional view showing the door weatherstrip of this embodiment attached to an inner panel by a mounting clip.

[0018] As described above, as shown in Fig. 1, the upper part of the door body 2 of the front door 1 of an automobile is provided with a sash portion 3 formed by joining an inner panel 3a and an outer panel 3b by hemming. A door weatherstrip 21 that seals the gap between the front door 1 and the vehicle body opening is provided on the inner surface of the outer periphery of the door body 2 and the sash portion 3. As shown in Fig. 2, this door weatherstrip 21 is composed of an extrusion molded portion 11a and a molded portion 11b, and the door weatherstrip 21 on the molded portion 11b side will be described below.

[0019] The door weatherstrip 21 is entirely formed as a single unit from a rubber or resin material, and as shown in Figures 4 and 5, is equipped with a mounting base 22 that is attached and fixed to an inner panel 3a such as a door outer panel on the inner surface of the outer periphery of the door body 2 or the sash portion 3 by a mounting clip 34 described later, a hollow seal portion 23 that is integrally provided at the upper end of the mounting base 22 on the inner side of the vehicle and functions as a main seal portion by elastically contacting the straight portion 6a of the vehicle body panel 6 when the door is closed, and a seal lip 24 that protrudes toward the outside of the vehicle from the inner side wall 22a of the mounting base 22 and functions as a sub-seal portion by elastically contacting the underside of the curved outer periphery 6b of the vehicle body panel 6.

[0020] The mounting base 22 has a substantially rectangular cross section and is formed along the outer periphery of the front door 1 including the sash portion 3, and has a space 22b formed therein that is continuous with the hollow seal portion 23 and extends along the longitudinal direction.

[0021] On the side wall 22a of the mounting base 22 facing the vehicle interior, two panel lips 25a, 25b that elastically contact the hemming flange portion 3c of the sash portion 3, for example, are provided in upper and lower two stages.

[0022] In addition, three seal protrusions 27a, 27b, 27c that come into contact with the inner panel 3a are integrally provided along the longitudinal direction of the door weather strip 21 on the bottom surface 26a of the base portion 26 of the mounting base 22. Two seal protrusions 27a, 27b are arranged on both sides of the lower end surface of the side wall 22a on the vehicle interior side of the mounting base 22, and the other seal protrusion 27c is arranged on the lower end surface of the joining portion with the other end of the hollow seal portion 23.

[0023] As shown in FIG. 3, the base portion 26 has three slits 28, 29, 30 formed therethrough for removing a core (not shown) when releasing the mold after molding.

[0024] The three slits 28-30 are formed in the center of the width of the base portion 26, elongated along the longitudinal direction, and separated from each other at a predetermined interval in the longitudinal direction. By separating the slits 28-30 into three in this manner, it becomes unnecessary to bond the adjacent slits 28-30 with an adhesive, as described above, and therefore the number of work steps and the cost can be reduced.

[0025] Each of the slits 28-30 has a pair of protrusions 31, 32, 33 on each of the outer opening edges 28a-30a. Each pair of protrusions 31-33 is arranged parallel to the longitudinal direction of the outer opening edges 28a-30a of each of the slits 28-30, and each protrusion height is set to be uniform or approximately uniform, and this protrusion height is set to be approximately the same as the protrusion height of each of the seal protrusions 27a-27c. Moreover, each of the protrusions 31-33 is provided only in the longitudinal direction of each of the outer opening edges 28a-30a, and is not provided at both ends in the longitudinal direction of each of the outer opening edges 28a-30a. Each of the protrusions 31-33 is arranged parallel to each of the seal protrusions 27a-27c, and each cross-sectional width length is set to be approximately the same as the cross-sectional width length of each of the seal protrusions 27a-27c. As shown in FIG. 6, the mounting base 22 is fixed to the inner panel 3a via a mounting clip 34 inserted through at least one of the three slits 28 to 30, for example, the central slit 29.

[0026] The hollow seal portion 23 is formed to have a substantially elliptical cross section, and in a free state when the door is open, as shown in Fig. 4, the tip portion 23a is formed to bulge in a substantially linear manner toward the straight portion 6a of the vehicle body panel 6. When the door is closed, as shown in Fig. 5, the tip portion is pressed against the straight portion 6a of the vehicle body panel 6 and is compressed and deformed, thereby sealing the gap between the inner panel 3a and the vehicle body panel 6.

[0027] [Functions and Effects of the Door Weather Strip According to the Present Embodiment] As described above, when the front door 1 of the automobile is closed, the tip of the hollow seal portion 23 of the door weatherstrip 21 according to this embodiment elastically contacts the outer surface of the straight portion 6a of the vehicle body panel 6 as shown in Fig. 5. As a result, the hollow seal portion 23 is compressed and deformed in a direction in which it is entirely crushed by the pressing force of the front door 1 (vehicle body panel 6).

[0028] In this embodiment, the protrusions 31-33 are provided on the outer opening edges 28a-30a of the three slits 28-30, respectively, so that the rigidity (strength) of the opening edges 28a-30a of the slits 28-30 is sufficiently high. Therefore, as described above, when the hollow seal portion 23 is compressed and deformed by the pressing force from the vehicle body panel 6 when the front door 1 is closed, the opening edges 28a-30a of the slits 28-30 can be effectively prevented from opening even if pressure due to this compressive deformation is applied.

[0029] In addition, in the door weatherstrip 21, the strength of the base portion 26 of the mounting base 22 is increased due to the increased rigidity of the outer opening edges 28a-30a of the slits 28-30 caused by the protrusions 31-33, and therefore the supporting rigidity of the mounting base 22 with respect to the hollow seal portion 23 is also increased. As a result, a decrease in the sealing pressure of the hollow seal portion 23 with respect to the vehicle body panel 6 and a decrease in the sealing pressure of the base portion 26 with respect to the inner panel 3a are suppressed, improving the overall sealing performance.

[0030] Furthermore, in this embodiment, three sealing protrusions 27a to 27c are provided on the bottom surface 26a of the base portion 26, and the protrusions 31 to 33 are also provided, which abut against the inner panel 3a to provide multiple sealing, thereby improving the sealing performance.

[0031] As shown in FIG. 6, the mounting base 22 is fixed to the inner panel 3a via a mounting clip 34 inserted through at least one of the slits 29, which allows for effective use of the slits.

[0032] The present invention is not limited to the configuration of the above-described embodiment, and for example, the protrusions 31 to 33 may be formed on the entire peripheral portion of the outer opening edges 28a to 30a of the slits 28 to 30. Also, it is possible to form two or four or more slits.

[0033] Also, the molded door weatherstrip 21 can be molded with either hard or soft rubber or resin material for the entire material, including the mounting base 22 and hollow seal portion 23. It is also possible to mold the mounting base 22 with a hard solid rubber material and the hollow seal portion with a soft sponge rubber material, but when mold releasability is taken into consideration, using the same material for all parts provides better mold releasability.

[0034] In addition, in this embodiment, the door weather strip applied to the front door 1 has been described, but it can also be applied to a rear door, a hatchback door, and the like.

[0035] As the door weather strip based on the embodiment described above, for example, the following aspects are conceivable.

[0036] That is, a preferred embodiment of the door weather strip according to the present invention is a door weather strip having a molded portion equipped with a mounting base to be attached to a door panel of a vehicle door, and a hollow seal portion that is integral with the mounting base and elastically contacts the vehicle body panel when the door is closed, and wherein a plurality of slits are formed and divided along the longitudinal direction in the base portion of the mounting base that abuts against the door panel, and wherein a protrusion is provided on the outer opening edge of at least one of the slits. More preferably, a base portion of the mounting base is provided with a plurality of sealing protrusions arranged parallel to the protrusion and adapted to abut against the door panel.

[0037] More preferably, the protrusions are provided along the longitudinal direction on both sides in the width direction of the outer opening edge of each of the slits.

[0038] More preferably, the mounting base is fixed to the door panel via a mounting clip inserted through at least one of the slits. [Explanation of symbols]

[0039] 1...Front door (door) 2. Door body 3…Sash section 3a…Inner panel (door panel) 3b…Outer panel (door panel) 6…Body panel 6a…Straight section 11·21…Door weather strip 11a...Extrusion molding section 11b…Mold forming part 22…Mounting base 23…Hollow seal part 26...basal part 26a…Bottom surface 26b…Outer surface 27a~27c…Seal protrusions 28~30…Slit 28a~30a…Outer opening edge 31~33…Protrusion 34…Mounting clip

Claims

1. A door weather strip having a molded part including a mounting base to be attached to a door panel of a vehicle door, and a hollow seal part integral with the mounting base and elastically contacting a vehicle body panel when the door is closed, and a base part of the mounting base that contacts the door panel has a plurality of slits formed in a longitudinal direction, A door weather strip characterized in that a protrusion is provided on an outer opening edge of at least one of the slits.

2. 2. The door weather strip according to claim 1, a door weather strip comprising a base portion of the mounting base and a plurality of sealing protrusions arranged parallel to the protrusion and adapted to abut against the door panel;

3. 2. The door weather strip according to claim 1, a protrusion provided along a longitudinal direction on both sides in a width direction of an outer opening edge of each of the slits;

4. 2. The door weather strip according to claim 1, The door weather strip is characterized in that the mounting base is fixed to the door panel via a mounting clip inserted through at least one of the slits.

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