Door weather strip

Abstract

To provide a door weather strip which can suppress protrusion of a sub-seal lip to an outdoor side with respect to a door panel line.SOLUTION: In a door weather strip (4), a first panel lip (81) contacts an inside surface (121a) of a flange part (121) of a door sash (12) and the first panel lip (81) supports a base part (71) of a sub-seal lip (7) as a so-called prop, whereby bending deformation of the base part 71 of the sub-seal lip (7) can be suppressed. By this, the sub-seal lip (7) is properly bent at a designed bending point (Pb), and defect such as protrusion of a lip part (72) of the sub-seal lip (7) from a panel line (PL) of a door (1) can be suppressed.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a door weather strip that is attached to the inner peripheral edge of an automobile door, for example. [Background technology]

[0002] Known conventional door weather strips include those described in the following patent documents.

[0003] 8 and 9, the conventional door weatherstrip 4 has a mounting base 5 that is fixed to the inner peripheral edge of the door 1 (mounting surface 122 of the door sash 12) via clips (not shown) that are inserted into the mounting holes 54; a hollow seal portion 6 that protrudes from the upper wall portion 55 of the mounting base 5 toward the interior side of the vehicle and elastically contacts the inner seal area 21 of the vehicle body panel 2 when the door 1 is closed; a sub-seal lip 7 that is bent from the upper wall portion 55 of the mounting base 5 toward the exterior side of the vehicle and elastically contacts the outer seal area 22 of the vehicle body panel 2 when the door 1 is closed; and a first panel lip 81 that extends from the side portion 56 of the mounting base 5 toward the exterior side of the vehicle and elastically contacts the inner surface 121a of the flange portion 121 of the door sash 12. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Utility Model Registration No. 3145716 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the conventional door weatherstrip 4 does not have a clear bending point on the sub-seal lip 7. Therefore, as shown in Fig. 9, when the sub-seal lip 7 bends and deforms when the door 1 is closed, in addition to the first bending point P1, which is the designed bending point, a second bending point P2 occurs in the middle of the base portion 71, and the sub-seal lip 7 bends over the entire section Q between the first bending point P1 and the second bending point P2. As a result, the lip portion 72 of the sub-seal lip 7 protrudes from the panel line PL of the door 1, which mars the appearance of the vehicle body (not shown), and there is still room for improvement.

[0006] The present invention was devised with an eye on such technical issues, and aims to provide a door weather strip that can prevent the sub-seal lip from protruding beyond the door panel line to the outside of the vehicle. [Means for solving the problem]

[0007] In one aspect, the door weatherstrip of the present invention comprises a mounting base that is attached to a door panel of a vehicle; a hollow seal portion that protrudes from the mounting base toward the inside of the vehicle and elastically contacts the inner seal area of ​​the vehicle body panel when the door is closed; a sub-seal lip that bends from the mounting base toward the outside of the vehicle and elastically contacts the outer seal area of ​​the vehicle body panel when the door is closed; and a panel lip that protrudes from a root of the sub-seal lip toward the outside of the vehicle and has a tip that abuts against the inner surface of the door panel when the mounting base is fixed to the door panel, and the panel lip abuts against the inner surface of the door panel and supports the root of the sub-seal lip when the door is closed.

[0008] In this way, in the present invention, the panel lip abuts against the door panel and supports the base of the sub-seal lip, thereby restricting bending deformation of the base of the sub-seal lip when the door is closed, thereby ensuring appropriate bending deformation of the sub-seal lip at the designed bending point.

[0009] In a preferred embodiment of the door weather strip according to the present invention, the panel lip is preferably formed so as to be thickest at the base and tapered toward the tip.

[0010] In this way, the panel lip is formed so that its base is thickest, thereby improving the rigidity of the panel lip and effectively suppressing bending deformation of the base of the sub-seal lip when the door is closed.

[0011] Furthermore, since the panel lip is thickest at its base, the base of the panel lip can support the base of the sub-seal lip over a relatively wide area, which more effectively prevents the base of the sub-seal lip from bending when the door is closed.

[0012] In a further preferred embodiment of the door weather strip according to the present invention, the base portion of the panel lip preferably extends over substantially the entire length of the base portion of the sub-seal lip.

[0013] In this way, the base of the panel lip extends over almost the entire longitudinal area of ​​the base of the sub-seal lip, which enables the panel lip to support the base of the sub-seal lip over the entire longitudinal area, thereby more effectively suppressing bending deformation of the base of the sub-seal lip when the door is closed.

[0014] From another viewpoint, a preferred embodiment of the door weatherstrip according to the present invention comprises a mounting base that is attached to a door panel of a vehicle; a hollow seal portion that protrudes from the mounting base toward the interior side and elastically contacts the inner seal area of ​​the vehicle body panel when the door is closed; a sub-seal lip that bends from the mounting base toward the exterior side and elastically contacts the outer seal area of ​​the vehicle body panel when the door is closed; and a panel lip that protrudes from a root portion of the sub-seal lip toward the exterior side and has a tip portion that abuts against the inner surface of the door panel when the mounting base is fixed to the door panel, wherein the sub-seal lip has a warped shape such that a root side region from the root portion to a middle portion becomes more distant from the inner surface of the door panel as it approaches the middle portion, and the panel lip is positioned so as to be biased toward the sub-seal lip than the mounting base.

[0015] In this way, in the present invention, the base-side region of the sub-seal lip from its base to its intermediate portion has a curved shape that separates it from the panel lip as it approaches the intermediate portion, and the panel lip is positioned so as to be offset toward the sub-seal lip from its mounting base. Therefore, when the door is closed, a moment that rotates the base of the sub-seal lip toward the interior of the vehicle is easily generated based on the reaction force generated by the panel lip elastically contacting the door panel. This prevents the base of the sub-seal lip from tilting and bending toward the exterior of the vehicle when the door is closed, and prevents the tip of the sub-seal lip from protruding beyond the door panel toward the exterior. [Effects of the Invention]

[0016] According to the present invention, the panel lip abuts against the door panel and supports the base of the sub-seal lip, thereby restricting bending deformation of the base of the sub-seal lip when the door is closed. This allows the sub-seal lip to bend appropriately at the designed bending point, preventing the tip of the sub-seal lip from protruding beyond the door panel toward the exterior. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a side view of an automobile to which a door weather strip according to the present invention is applied; [Figure 2] FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, showing the first embodiment of the present invention, illustrating a free state of the door weather strip when the door is open. [Figure 3] FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, illustrating a compressed state of the door weather strip when the door is closed, according to the first embodiment of the present invention. [Figure 4] FIG. 4 is an enlarged view of a main part of FIG. 3. [Figure 5] 1. FIG. 5 is a cross-sectional view showing a second embodiment of the present invention, taken along line AA in FIG. 1, illustrating a free state of the door weather strip when the door is open. [Figure 6] 1. FIG. 5 is a cross-sectional view showing a second embodiment of the present invention, taken along line AA in FIG. 1, illustrating a compressed state of the door weather strip when the door is closed. [Figure 7] FIG. 7 is an enlarged view of a main part of FIG. 6. [Figure 8] FIG. 2 is a cross-sectional view showing a conventional door weatherstrip, taken along line AA in FIG. 1, showing the free state of the door weatherstrip when the door is open. [Figure 9] FIG. 2 is a cross-sectional view showing a conventional door weatherstrip, corresponding to the cross section taken along line AA in FIG. 1, illustrating a compressed state of the door weatherstrip when the door is closed. DETAILED DESCRIPTION OF THE INVENTION

[0018] An embodiment of a door weatherstrip according to the present invention will be described in detail below with reference to the drawings. The following describes an example in which the door weatherstrip according to the present invention is applied to an automobile door. For ease of explanation, the top and bottom of the door weatherstrip when mounted on a vehicle body will be used as the reference, and the upper side of each figure, which corresponds to the upper side in the vertical direction, will be defined as "upper," and the lower side of each figure, which corresponds to the lower side in the vertical direction, will be defined as "lower."

[0019] [First embodiment] (Door weather strip configuration) FIG. 1 shows an enlarged view of a main part of the side of an automobile to which a door weatherstrip 4 according to this embodiment is applied. FIG. 2 shows a cross-sectional view of the door weatherstrip 4 according to this embodiment in a free state, taken along line AA in FIG. 1, when the door 1 is open. Meanwhile, FIG. 3 shows a cross-sectional view of the door weatherstrip 4 according to this embodiment in a compressed state, taken along line AA in FIG. 1, when the door 1 is closed. FIG. 4 shows an enlarged view of the main part of FIG. 3. Note that arrow D in FIG. 4 indicates the entry trajectory of the door 1.

[0020] For example, as shown in Fig. 1, a front door (hereinafter simply referred to as "door") 1 has a substantially arch-shaped door sash 12 (corresponding to the door panel of the present invention), and a long door weatherstrip 4 is attached in a closed loop shape to the periphery of the interior of the vehicle using, for example, clips (not shown), as shown in Fig. 2. When the door 1 is closed, as shown in Fig. 3, the door weatherstrip 4 elastically contacts the vehicle body panel 2 around the periphery of the door opening on the vehicle body side, thereby sealing the interior and exterior of the vehicle and ensuring airtightness, watertightness, soundproofing, etc.

[0021] 1, the door 1 is formed integrally with a door body 11 and a door sash 12 extending in an arch shape from the upper part of the door body 11. As shown in FIGS. 2 and 3, the door sash 12 has a flange portion 121 formed by hemming the flange portion 102a of the door outer panel 102 onto the flange portion 101a of the door inner panel 101, and a flat mounting surface 122 extending from the flange portion 121 toward the interior side and to which the door weatherstrip 4 is attached.

[0022] 1, the door weatherstrip 4 is formed by extruding an EPDM sponge material into a general portion including an upper edge portion 41 that is substantially linear and extends along the upper edge portion of the door sash 12, and vertical edge portions 42, 43 and a lower edge portion 44 that extend along the front and rear vertical and lower edge portions, respectively, of the door 1. The upper edge portion 41 and the vertical edge portion 43 are connected via a molded portion (not shown).

[0023] The upper edge portion 41 of the door weatherstrip 4 is formed by the extrusion molding and has a uniform cross-sectional shape as shown in Fig. 2. Specifically, the door weatherstrip 4 has a mounting base 5 including hollow spaces (a first space 51 and a second space 52 described later), a hollow seal portion 6 that protrudes obliquely from the mounting base 5 toward the interior of the vehicle and is capable of elastically contacting the inner seal area 21 of the vehicle body panel 2 when the door 1 is closed, a sub-seal lip 7 that is bent from the mounting base 5 toward the exterior of the vehicle and is capable of elastically contacting the outer seal area 22 of the vehicle body panel 2 when the door 1 is closed, and a pair of first and second panel lips 81 (corresponding to the panel lip of the present invention) and 82 that are arranged in two stages on the exterior side portion 56 of the mounting base 5 and extend toward the exterior to be capable of elastically contacting the inner surface of the flange portion 121 of the door sash 12.

[0024] The mounting base 5 is hollow and has two spaces extending longitudinally therein, a first space 51 and a second space 52. The mounting base 5 is fixed to the mounting surface 122 of the door sash 12, for example, via a plurality of clips (not shown) inserted into a plurality of mounting holes 54 that extend downward from the first space 51 and penetrate a bottom wall portion 53. The mounting base 5 has a hollow seal portion 6 and a sub-seal lip 7 connected to an upper wall portion 55 that faces the vehicle body panel 2. The mounting base 5 has a second panel lip 82 connected to an exterior side portion 56 that faces the inner surface 121a of the flange portion 121 of the door sash 12.

[0025] The hollow seal portion 6 has a cross section that is formed in a substantially inverted U shape in the free state shown in Fig. 2, and is integrally formed with an interior side portion 61 that curves toward the interior of the vehicle, and an exterior side portion 62 that curves toward the exterior of the vehicle. When the door 1 is closed, as shown in Fig. 3, the interior side portion 61 elastically contacts the vehicle body panel 2 and flexes, and the interior side portion 61 is pressed against the vehicle body panel 2, causing the exterior side portion 62 to flex and deform, thereby elastically contacting the vehicle body panel 2 and performing a sealing function.

[0026] 2, the sub-seal lip 7 extends upward from the exterior-side end of the upper wall portion 55 of the mounting base 5 and integrally comprises a base portion 71 (corresponding to the base portion of the present invention) formed to gradually widen toward the base, and a lip portion 72 bent from the tip of the base portion 71 to the exterior side via a bending portion 73, and as shown in FIGS. 3 and 4, when the door 1 is closed, the tip of the lip portion 72 bent to the exterior side via the bending portion 73 elastically contacts the exterior seal region 22 of the vehicle body panel 2. The sub-seal lip 7 is formed so that the boundary between the base portion 71 and the lip portion 72 is relatively thin, and this boundary portion is set as the design bending point Pb when the sub-seal lip 7 bends when the door 1 is closed.

[0027] 2, the first panel lip 81 is provided on a side portion of the base 71 of the sub-seal lip 7, and is provided at a position closer in the longitudinal direction to the lip portion 72 of the sub-seal lip 7 than the mounting base 5, extending toward the exterior of the vehicle. That is, the first panel lip 81 integrally has a base 811 (corresponding to a root portion according to the present invention) connected to the base 71 of the sub-seal lip 7, and a protrusion 812 formed at the tip of the base 811 and protruding so as to bend toward the sub-seal lip 7, and in a free state, the protrusion 812 is provided so as to be able to elastically come into contact with the inner surface 121a of the flange portion 121 of the door sash 12.

[0028] 4, the base 811 is connected to the base 71 of the sub-seal lip 7 over a root side region Sp between a bending point Pb of the sub-seal lip 7 when the sub-seal lip 7 is bent and deformed when the door 1 is closed, and a connection point Pc between the base 71 of the sub-seal lip 7 and the mounting base 5. The base 811 also has enough rigidity to resist a pressing force F acting from the vehicle body panel 2 side when the sub-seal lip 7 is bent and deformed when the door 1 is closed. In other words, the base 811 functions as a so-called stop bar between the base 71 of the sub-seal lip 7 and the flange portion 121 of the door sash 12 when the sub-seal lip 7 is bent and deformed when the door 1 is closed.

[0029] Note that the above phrase "capable of resisting the pressing force F acting from the vehicle body panel 2 side" does not necessarily mean that bending deformation of the base 811 is completely eliminated, but includes allowing some bending deformation as long as it is possible to suppress bending deformation of the base 71 of the sub-seal lip 7 to an extent that is capable of suppressing protrusion of the lip portion 72 of the sub-seal lip 7.

[0030] The protrusion 812 is set so that the angle (minor angle) θ formed with the inner surface 121a of the flange portion 121 of the door sash 12 is an acute angle, and the tip of the protrusion 812 is able to abut against the inner surface 121a of the flange portion 121 of the door sash 12 at a position higher than the mounting base 5. Furthermore, the protrusion 812 is formed so as to bend toward the sub-seal lip 7, so that when the sub-seal lip 7 is bent and deformed when the door 1 is closed, a reaction force RF is generated along the base 811 in the direction opposite to the pressing force F acting from the vehicle body panel 2. In other words, the reaction force RF generated when the first panel lip 81 elastically contacts the inner surface 121a of the flange portion 121 of the door sash 12 resists the pressing force F, making it possible to suppress bending of the base 71 of the sub-seal lip 7.

[0031] 2 and 3, the second panel lip 82 extends from the exterior-side end of the bottom wall portion 53 of the mounting base 5 toward the exterior side. Similar to the first panel lip 81, when the door 1 is closed, the second panel lip 82 bends upward at a thin base portion 821 provided at the base portion as a bending point, and the reaction force causes the tip portion 822 of the second panel lip 82 to elastically come into contact with the inner surface 121a of the flange portion 121 of the door sash 12.

[0032] (Effects of this embodiment) In the conventional door weatherstrip 4, no clear bending point is provided in the sub-seal lip 7. For this reason, as shown in Fig. 9, when the sub-seal lip 7 bends and deforms when the door 1 is closed, in addition to the first bending point P1, which is the designed bending point, a second bending point P2 occurs in the middle of the base portion 71, and the sub-seal lip 7 bends over the entire section Q between the first bending point P1 and the second bending point P2. As a result, the lip portion 72 of the sub-seal lip 7 protrudes from the panel line PL of the door 1 (see Y in Fig. 9), which impairs the appearance and leaves room for improvement.

[0033] In contrast, in the door weatherstrip 4 according to this embodiment, as shown in Fig. 4, the first panel lip 81 abuts against the inner surface 121a of the flange portion 121 of the door sash 12, and the first panel lip 81 supports the base portion 71 of the sub-seal lip 7 as a so-called support rod, thereby restricting bending deformation of the base portion 71 of the sub-seal lip 7. This allows the sub-seal lip 7 to bend appropriately at the designed bending point Pb, and the lip portion 72 of the sub-seal lip 7 is located inside (on the interior side of the vehicle) the panel line PL of the door 1 (see X in Fig. 4). As a result, it is possible to prevent the lip portion 72 of the sub-seal lip 7 from protruding from the panel line PL of the door 1.

[0034] In this embodiment, the base 811 of the first panel lip 81 is formed so that the root side is thickest. This improves the rigidity of the first panel lip 81, and effectively suppresses bending deformation of the base 71 of the sub-seal lip 7.

[0035] Furthermore, in this embodiment, the base 811 of the first panel lip 81 is formed so that the root side is thickest, which enables the base 811 of the first panel lip 81 to support the base 71 of the sub-seal lip 7 over a relatively wide range. This makes it possible to more effectively suppress bending deformation of the base 71 of the sub-seal lip 7.

[0036] Furthermore, in this embodiment, the base 811 of the first panel lip 81 extends over almost the entire longitudinal area of ​​the base 71 of the sub-seal lip 7, which enables the first panel lip 81 to support the base 71 of the sub-seal lip 7 over the entire longitudinal area. This makes it possible to more effectively suppress bending deformation of the base 71 of the sub-seal lip 7.

[0037] [Second embodiment] 5 to 7 show a second embodiment of a door weather strip according to the present invention. This embodiment is mainly characterized by adjusting the relative positional relationship between the mounting base 5 and the first panel lip 81 and changing the shape of the base 71 of the sub-seal lip 7, but other configurations are the same as those of the first embodiment. Therefore, the same components as those of the first embodiment are denoted by the same reference numerals and detailed description thereof will be omitted.

[0038] (Door weather strip configuration) Fig. 5 shows the door weatherstrip 4 according to this embodiment in a free state, and is a cross-sectional view of the door weatherstrip 4 taken along line AA in Fig. 1 when the door is open. Meanwhile, Fig. 6 shows the door weatherstrip 4 according to this embodiment in a compressed state, and is a cross-sectional view of the door weatherstrip 4 taken along line AA in Fig. 1 when the door is closed. Fig. 7 shows an enlarged view of a main part of Fig. 6. Note that arrow D in Fig. 7 indicates the entry path of the door 1.

[0039] 5 and 6, in the door weatherstrip 4 according to this embodiment, the first panel lip 81 is disposed offset to a position closer to the lip portion 72 of the sub-seal lip 7. Furthermore, the first panel lip 81 according to this embodiment is also formed so that the base portion 811 side is relatively thicker than the tip portion 813 so that the root portion connecting to the base portion 71 of the sub-seal lip 7 is the thickest.

[0040] In addition, in this embodiment, as shown in FIG. 5, the base 71 of the sub-seal lip 7 has a warped shape in which the base side region Sp, which extends from the connection point Pc with the mounting base 5 corresponding to the root portion to the designed bending point Pb corresponding to the middle portion, gradually moves away from the inner surface 121a of the flange portion 121 of the door sash 12 as it approaches the designed bending point Pb.

[0041] (Effects of this embodiment) In the conventional door weatherstrip 4, as shown in Fig. 9, the first panel lip 80 is positioned lower than the upper wall portion 55 of the mounting base 5, i.e., positioned far from the lip portion 72 of the sub-seal lip 7. For this reason, when the sub-seal lip 7 is bent and deformed when the door 1 is closed, the base portion 71 of the sub-seal lip 7 is likely to tilt toward the exterior due to the pressing force F acting from the vehicle body panel 2, and in addition to the first bending point P1, which is the designed bending point, a second bending point P2 is likely to occur in the middle of the base portion 71. As a result, the entire area of ​​the section Q between the first bending point P1 and the second bending point P2 is bent, which could cause the lip portion 72 of the sub-seal lip 7 to protrude from the panel line PL of the door 1 (see Y in Fig. 9).

[0042] In contrast, in the door weatherstrip 4 according to this embodiment, as shown in Fig. 5, the root side region Sp from the connection point Pc of the sub-seal lip 7 with the mounting base 5 to the design bending point Pb determined at the time of design has a warped shape that moves away from the inner surface 121a of the flange portion 121 of the door sash 12 toward the design bending point Pb, and the first panel lip 81 is positioned biased toward the sub-seal lip 7 rather than the mounting base 5. For this reason, when the door 1 is closed, as shown in Fig. 7, a reaction force RF generated by the first panel lip 81 coming into elastic contact with the door panel tends to generate a moment M that rotates the base portion 71 of the sub-seal lip 7 toward the interior side of the vehicle around a center C located between the first panel lip 81 and the upper wall portion 55 of the mounting base 5. This prevents the base 71 of the sub-seal lip 7 from tilting and bending toward the exterior when the door 1 is closed, and the lip portion 72 of the sub-seal lip 7 is positioned inside the panel line PL of the door 1 (see X in FIG. 7). As a result, it is possible to prevent the lip portion 72 of the sub-seal lip 7 from protruding beyond the panel line PL of the door 1 toward the exterior.

[0043] The present invention is not limited to the configurations disclosed in the above-mentioned embodiments, etc., and specific aspects of the details that are not directly related to the technical features of the present invention, such as the shape of the mounting base 5, the shape and arrangement of the hollow seal portion 6, and the presence or absence of the second panel lip 82, can be freely changed according to the specifications of the vehicle body to which the present invention is applied, within the scope that does not deviate from the intent of the present invention. [Explanation of symbols]

[0044] 1...Front door (door) 12...Door sash (door panel) 121...Flange part 121a...inner surface 2...Body panel 21...Inner seal area 22...Outer seal area 4...Door weather strip 5...Mounting base 6...Hollow seal part 7...Sub-seal lip 71...Base (root) 72...Lip (tip) 81...First panel lip (panel lip) 811...Base (root) 812...Protrusion Pb...break point (middle part) Pc...Connection point (base) Sp: base region PL...Panel line

Claims

1. a mounting base that is attached to a door panel of a vehicle; a hollow seal portion that protrudes from the mounting base toward the interior of the vehicle and elastically contacts an inner seal area of ​​the vehicle body panel when the door is closed; a sub-seal lip that bends from the mounting base toward the exterior side and elastically contacts an outer seal area of ​​the vehicle body panel when the door is closed; a panel lip that protrudes from a base portion of the sub-seal lip toward the exterior side and has a tip portion that abuts against an inner surface of the door panel when the mounting base is fixed to the door panel; Equipped with The panel lip integrally includes a base portion connected to the base portion of the sub-seal lip and a protrusion formed at the tip of the base portion so as to bend toward the sub-seal lip in a free state, and when the door is closed, the panel lip abuts against the inner surface of the door panel and supports the base portion of the sub-seal lip. The protrusion is set so that a minor angle between the protrusion and the inner surface of the door panel is an acute angle, and when the door is closed, a tip of the protrusion abuts against the inner surface of the door panel at a position higher than the mounting base. A door weather strip characterized by the above.

2. The door weather strip according to claim 1, The panel lip is formed so as to be thickest at the base and tapered toward the tip. A door weather strip characterized by the above.

3. The door weather strip according to claim 1, The root portion of the panel lip is approximately parallel to the longitudinal direction of the root portion of the sub-seal lip. It extends throughout the entire A door weather strip characterized by the above.

Images