Weather strip

Abstract

To increase a holding power of a flange and to simplify assembly workability.SOLUTION: A weather stripe 1 includes: a mounting base 10 which is fitted to a flange F provided along a door opening peripheral edge part of a body B of an automobile 100, is in a cross section nearly U-shape composed of a vehicle inner side wall 11, a vehicle outer side wall 12 and a bottom wall 13 and extends in a longitudinal direction; and a hollow seal part 20 where a core material 17 bent into a nearly U-shape is embedded inside the mounting base 10, projection pieces 15 16 are provided inside both side walls, and are in elastic contact with a door D when the door D closes. On an end side of the vehicle inner side wall 11 of the mounting base 10, there is provided a vehicle inner side belt-like member 30 extending in the longitudinal direction and composed of a rigid material more rigid than a material composing the mounting base 10; on an end side of the vehicle outer side wall 12 of the mounting base 10, a vehicle outer side belt-like member 40 extending in the longitudinal direction and composed of a rigid material more rigid than the material composing the mounting base 10.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a weather strip that is attached along a door opening of an automobile body and elastically contacts the door when the door is closed to seal the inside and outside of the vehicle. [Background technology]

[0002] A weather strip 50 as shown in FIG. 5 is attached to a flange F provided along the periphery of a door opening of an automobile body (see, for example, FIG. 3 of Patent Document 1). Such a weather strip 50 is attached by being inserted into a flange F provided along the peripheral edge of the opening of an automobile side door or sliding door, and comprises a mounting base 60 with a generally U-shaped cross section consisting of an interior side wall 61, an exterior side wall 62, and a bottom wall 63 connecting both side walls 61, 62, and a hollow seal portion 70 that is integrally molded with the exterior side wall 62 of the mounting base 60 and elastically contacts the door when the door is closed. A plurality of protrusions 65 are provided on the inside of both side walls 61, 62 of the mounting base 60, which come into contact with the surface of the flange F when inserted, and a tongue-shaped lip portion 66 is provided on the interior side wall 61. A core material 67 bent into a substantially U-shape is embedded inside the mounting base 60.

[0003] The core material 67 may be one that does not separate into pieces inside the mounting base 60 after the weatherstrip 50 is extruded and vulcanized, but remains in that state (the so-called connected type), or one that has multiple connecting parts formed into a fishbone shape, and the connecting parts separate into pieces inside the mounting base 60 after the weatherstrip 50 is extruded and vulcanized (the so-called break type).

[0004] In the weather strip 50 using the interlocking type core material 67, the core material 67 is not separated but interlocked in the mounting base 60, so that it hardly stretches even when pulled in the longitudinal direction. As a result, it has excellent holding power. Also, due to the recent trend of making automobiles lighter, the core material 67 of the weather strip 50 is now being used that is thinner than the conventional thickness. Since the interlocking type core material 67 needs to be interlocked when it is assembled to the automobile, it is necessary to use a metal material with high rigidity, such as a high tension material, so that it does not break even in the interlocking portion with a thin thickness. Generally, the cost of the hatching material is high because the material is expensive. In contrast, in the weatherstrip 50 using the break-type core material 67, the core material 67 is separated inside the mounting base 60, so it easily stretches when pulled in the longitudinal direction. As a result, there is a problem that the holding force is small and it is likely to fall off in a short time after being attached to the flange F. Also, in the case of the break-type core material 67, even if the connecting portion has a thin plate thickness, it only needs to be connected when the weatherstrip 50 is extrusion vulcanized, so there is no need to use a high tension material, which is a metal material with high rigidity, and conventional metal materials with relatively low raw material costs can be used, making it possible to reduce manufacturing costs. Furthermore, if the holding force is weak, the weather strip will bend and sag easily, as shown by the solid line in Figure 6, so the assembly work requires two workers. In other words, when the weather strip 50 is temporarily assembled to the flange F as shown in Figure 6, the weather strip 50 is likely to fall off from the flange F within a short period of time, so the worker needs to constantly hold down the temporarily assembled part with one hand, making it difficult for a single worker to perform the work.

[0005] In Patent Document 1, as shown in FIG. 5, a single strip-shaped member 75 made of a hard material extending in the longitudinal direction is provided on the inside of the terminal portion of the interior side wall 61 of the mounting base 60 to press the exterior side wall 62 against the surface of the flange F, thereby improving the holding force, but this is related to the structure at the corner portions of the weatherstrip 50, and the holding force at straight portions is not sufficiently improved, so the assembly workability remains poor. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2008-230595 A Summary of the Invention [Problem to be solved by the invention]

[0007] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a weather strip which has a stronger holding force against a flange and which facilitates assembly work. [Means for solving the problem]

[0008] In order to achieve the above object, the present invention provides a weather strip (1) comprising: a mounting base (10) that is attached to a flange (F) provided along the periphery of an opening of a door (D) of a body (B) of an automobile (100); the mounting base (10) has an approximately U-shaped cross section and extends in the longitudinal direction, the mounting base (10) being made up of an interior side wall (11), an exterior side wall (12), and a bottom wall (13) connecting both side walls (11, 12); a core material (17) bent into an approximately U shape is embedded inside the mounting base (10); protruding strips (15, 16) are provided on the insides of both side walls (11, 12) that come into contact with the surfaces of the flange (F); and a hollow seal portion (20) that is extruded integrally with the mounting base (10) on an exterior surface of the exterior side wall (12) of the mounting base (10) and that elastically comes into contact with the door (D) when the door (D) is closed, An interior side band-shaped member (30) extending in the longitudinal direction and made of a hard material having a harder property than a material constituting the mounting base (10) is provided on a tip side of the interior side wall (11) of the mounting base (10), The vehicle exterior belt-shaped member (40) extending in the longitudinal direction and made of a hard material having a harder property than the material constituting the mounting base (10) is provided at the tip side of the vehicle exterior side wall (12) of the mounting base (10).

[0009] The present invention also provides a mounting base (10) that is attached to a flange (F) provided along the periphery of an opening of a door (D) of a body (B) of an automobile (100), has an approximately U-shaped cross section and extends in the longitudinal direction, and is made up of an interior side wall (11), an exterior side wall (12), and a bottom wall (13) that connects both side walls (11, 12). A core material (17) bent into an approximately U shape is embedded inside the mounting base (10), and the insides of both side walls (11, 12) are respectively A weather strip (1) of the type in which a protrusion piece (15, 16) is provided in contact with a surface of the flange (F), a hollow seal portion (20) is extruded integrally with the mounting base (10) on an exterior surface of the exterior side wall (12) of the mounting base (10) and elastically contacts the door (D) when the door (D) is closed, and the core material (17) is separated into pieces within the mounting base (10) after extrusion molding, An interior side band-shaped member (30) extending in the longitudinal direction and made of a hard material having a harder property than a material constituting the mounting base (10) is provided on a tip side of the interior side wall (11) of the mounting base (10), The vehicle exterior belt-shaped member (40) extending in the longitudinal direction and made of a hard material having a harder property than the material constituting the mounting base (10) is provided at the tip side of the vehicle exterior side wall (12) of the mounting base (10).

[0010] The present invention is also characterized in that the interior side band member (30) has an interior side band member tip portion (31) provided at the tip of the interior side wall (11) of the mounting base (10) covering the tip side of the interior side wall (11) of the mounting base (10) with an L-shaped cross section, and an interior side band member interior portion (32) extending from the interior side end of the interior side band member tip portion (31) along the interior side surface of the interior side wall (11) toward the bottom wall (13).

[0011] In the present invention, a width (31T) of the interior-side belt-shaped member tip portion (31) of the interior-side belt-shaped member (30) is larger than a thickness (17T) of the core material (17), and an interior-side portion (32) of the interior-side belt-shaped member extends to the bottom wall (13) side beyond the interior-side end portion (17a) of the core material (17), The exterior-side belt-shaped member (40) has an exterior-side belt-shaped member tip portion (41) provided at the tip of the exterior-side side wall (12) of the mounting base (10) and covering the tip side of the exterior-side side wall (12) of the mounting base (10) in an L-shaped cross section, and an exterior-side belt-shaped member exterior portion (42) extending from the exterior end portion of the exterior-side belt-shaped member tip portion (41) toward the bottom wall (13) along the exterior side surface of the exterior-side side wall (12), The width (41T) of the outer-vehicle-side belt-like member tip portion (41) of the outer-vehicle-side belt-like member (40) is larger than the thickness (17T) of the core material (17).

[0012] The present invention is also characterized in that, of the two root portions (21, 22) of the hollow seal portion (20) relative to the exterior surface of the exterior side wall (12) of the mounting base (10), a first root portion (21) is provided on the bottom wall (13) side of the exterior side wall (12) of the mounting base (10) and a second root portion (22) is provided at the tip of the exterior side wall (12) of the mounting base (10), and the exterior band-shaped member (40) constitutes the second root portion (22).

[0013] The present invention is further characterized in that one of the protrusion pieces (16) provided on the vehicle exterior side wall (12) of the mounting base (10) is a vehicle exterior first protrusion piece (16a) extending from the tip of the vehicle exterior side wall (12) of the mounting base (10) toward the vehicle interior, and a base portion (16a1) of the vehicle exterior first protrusion piece (16a) covers the vehicle exterior band-shaped member tip portion (41) and elastically contacts the body (B) of the automobile (100).

[0014] Note that symbols in parentheses indicate corresponding elements or matters described in the drawings and in the detailed description of the invention described below. Effect of the Invention

[0015] According to the present invention, an interior side band-shaped member made of a hard material having a harder material than the material constituting the mounting base is provided on the tip side of the interior side wall of the mounting base of the weatherstrip, and an exterior side band-shaped member made of a hard material having a harder material than the material constituting the mounting base is provided on the tip side of the exterior side wall of the mounting base, so that the rigidity of the areas where the interior side band-shaped member and the exterior side band-shaped member are set is improved and they are less likely to stretch. Therefore, when the weatherstrip is temporarily assembled to the flange, the weatherstrip is strong against the flange and will not easily fall off from the assembled flange, allowing the work to be done by one worker. In other words, when the weatherstrip is temporarily assembled to the flange, the worker does not need to constantly hold down the temporarily assembled part with one hand, and even if both hands are removed from the weatherstrip, the weatherstrip will not fall off the flange, allowing the worker to work using both hands, making the work efficient.

[0016] In particular, when the core material is of the so-called break type, which is separated into pieces within the mounting base after the weatherstrip is vulcanized, the holding force against the flange is significantly reduced compared to a so-called connected type, which remains inside the mounting base without being separated after the weatherstrip is extrusion vulcanized. However, as in the present invention, by providing an interior band-shaped member and an exterior band-shaped member made of a hard material that is harder than the material constituting the mounting base at both ends of the mounting base, the rigidity of both ends of the mounting base is improved, making it less likely to stretch, and the holding force is dramatically increased. Thus, the present invention is particularly effective when applied to a weather strip having a mounting base in which a break-type core material is embedded.

[0017] In addition, according to the present invention, the interior side band-shaped member has an interior side band-shaped member tip portion provided at the tip of the interior side wall of the mounting base covering the tip side of the interior side wall of the mounting base in an L-shaped cross section, and an interior side portion of the interior side band-shaped member extending from the interior side end portion of the interior side band member tip portion toward the bottom wall side along the interior side surface of the interior side wall, thereby significantly improving the rigidity of both ends of the mounting base, so that the ends of the mounting base do not easily open and are less likely to stretch. This improves the ease of assembly when assembling the weather strip to the flange.

[0018] In addition, according to the present invention, the width of the interior side band member tip portion of the interior side band member is greater than the thickness of the core material, the interior side portion of the interior side band member extends further toward the bottom wall than the interior side end of the core material, and the exterior side band member has an exterior side band member tip portion provided at the tip of the exterior side wall of the mounting base covering the tip side of the exterior side wall of the mounting base with an L-shaped cross section, and an exterior side portion of the exterior side band member extending from the exterior end portion of the exterior side band member tip portion toward the bottom wall along the exterior side surface of the exterior side wall, and the width of the exterior side band member tip portion of the exterior side band member is greater than the thickness of the core material, so that the rigidity at both ends of the mounting base is greatly improved.

[0019] Furthermore, according to the present invention, the exterior belt-shaped member constitutes the second root portion of the hollow seal portion, so that the rigidity of the second root portion of the hollow seal portion is improved.

[0020] In addition, according to the present invention, the base portion of the exterior first protrusion piece extending from the tip of the exterior side wall of the mounting base toward the interior side of the vehicle covers the tip portion of the exterior band-shaped member and elastically contacts the vehicle body, thereby improving the ability of the weatherstrip to prevent water from passing through the flange. [Brief description of the drawings]

[0021] [Figure 1] 1 is a side view of an automobile to which a weather strip according to an embodiment of the present invention is attached. [Diagram 2] 2 is a cross-sectional view taken along line AA in FIG. 1, showing a weather strip according to the embodiment of the present invention. [Diagram 3] 3 is an enlarged cross-sectional view showing a main part of the weather strip shown in FIG. 2. [Figure 4] 2 is a cross-sectional view taken along line AA in FIG. 1, showing another weather strip according to an embodiment of the present invention. [Diagram 5] FIG. 11 is a cross-sectional view showing a weather strip according to a conventional example. [Figure 6]5 is a schematic diagram showing a comparison of the deflection state of a weatherstrip according to the present invention and a weatherstrip according to a conventional example, both of which are attached to a flange; FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] With reference to the drawings, a weather strip 1 according to an embodiment of the present invention will be described by showing an example in which it is applied to an automobile 100 having a sliding door D. Note that the same parts as those shown in the conventional example are given the same reference numerals.

[0023] 1 to 3, a weatherstrip 1 according to an embodiment of the present invention comprises a mounting base 10 which is attached by being inserted into a flange F provided along the periphery of a door opening of a body B of an automobile 100, and a hollow seal portion 20 which is provided on the mounting base 10 and elastically contacts a sliding door D when the door D is closed, and is manufactured by integrally extrusion molding the mounting base 10 and the hollow seal portion 20. The flange F is provided so as to go all the way around the periphery of the door opening of the body B of the automobile 100, and FIG. 2 shows the cross-sectional shape of the weatherstrip 1 attached to the flange F which extends horizontally in the front-rear direction of the automobile 100 at the top edge of the automobile 100.

[0024] The mounting base 10 has an approximately U-shaped cross section and extends in the longitudinal direction (front-rear direction of the automobile 100) and is made of a microfoamed solid rubber material such as EPDM. The insides of the both side walls 11, 12 (the sides facing the flange F) are provided with a plurality of protruding pieces 15, 16 that come into contact with the surface of the flange F when inserted, and the inside of the interior side wall 11 is provided with a lip portion 18 that has a tongue-like cross section and extends from the connection portion between the interior side wall 11 and the bottom wall 13 toward the interior side of the automobile. A core material 17 bent into an approximately U shape is embedded inside the mounting base 10.

[0025] The core material 17 is made to have a fishbone shape with multiple connecting parts, and the connecting parts are separated into pieces inside the mounting base 10 after the weather strip 1 is extrusion vulcanization molded (the so-called break type).

[0026] The protrusion 15 provided on the vehicle interior side wall 11 of the mounting base 10 has a lip shape that extends from the tip of the vehicle interior side wall 11 toward the vehicle exterior, and elastically contacts the vehicle interior surface of the flange F. The protrusions 16 provided on the vehicle exterior side wall 12 of the mounting base 10 are composed of a vehicle exterior first protrusion 16a, a vehicle exterior second protrusion 16b, and a vehicle exterior third protrusion 16c, which are spaced apart from one another. Each of them elastically contacts the vehicle exterior surface of the flange F. The vehicle exterior first protrusion piece 16a is in the shape of a lip extending from the tip of the vehicle exterior side wall 12 toward the vehicle interior and elastically contacts the flange F in a fully deflected state. In contrast, the vehicle exterior second protrusion piece 16b and the vehicle exterior third protrusion piece 16c are in the form of a block that abuts against and supports the flange F. The vehicle exterior second protrusion piece 16b and the vehicle exterior third protrusion piece 16c are formed from the same micro-foamed solid rubber material as the mounting base 10, but the vehicle exterior first protrusion piece 16a is formed from a sponge rubber material.

[0027] The interior-side protrusion piece 15 has a cross-sectional shape larger than the exterior-side protrusion piece 16 (the exterior first protrusion piece 16a, the exterior second protrusion piece 16b, the exterior third protrusion piece 16c), and before it elastically contacts the flange F, its tip 15a is located in an area R surrounded by the lower surface of the exterior-side second protrusion piece 16b, the upper surface of the exterior-side third protrusion piece 16c, an imaginary line K connecting the tip 16bE of the exterior-side second protrusion piece 16b and the tip 16cE of the exterior-side third protrusion piece 16c, and the interior surface of the exterior side wall 12, and is located closer to the lower surface of the exterior-side second protrusion piece 16b. The upper side surface 15b of the ridge piece 15 extends in a substantially straight line up to the tip 15a. In contrast, the lower side surface 15c of the ridge piece 15 extends in a substantially straight line up to just before the tip 15a, but is chamfered so that the thickness of the ridge piece 15 gradually decreases toward the tip 15a and curves upward.

[0028] Additionally, a non-drying sealer S that adheres to the tip of the flange F is attached to the inside of the bottom wall 13 of the mounting base 10. When the weatherstrip 1 is attached to the flange F, the ridges 15 elastically contact and bend, but the tips 15a of the ridges 15 are chamfered so that they barely come into contact with the sealer S. If a large amount of sealer S were to adhere to the tips 15a of the ridges 15, the coefficient of friction of the ridges 15 would decrease, causing them to slip and reducing their holding power for the flange F, which is undesirable. It is also possible to omit the sealer S.

[0029] The hollow seal portion 20 is integrally provided on the exterior side surface of the exterior side wall 12 of the mounting base 10 so as to bulge towards the exterior of the vehicle, and is made of a sponge rubber material such as EPDM. Of the two root portions 21, 22 of the hollow sealing portion 20 relative to the exterior surface of the exterior side wall 12 of the mounting base 10, the first root portion 21 is provided on the bottom wall 13 side of the exterior side wall 12 of the mounting base 10, slightly toward the tip (upper side) of the exterior side wall 12 from the connection between the exterior side wall 12 and the bottom wall 13, and the second root portion 22 is provided at the tip of the exterior side wall 12 of the mounting base 10.

[0030] An interior side band-shaped member 30 is provided at the tip side of the interior side wall 11 of the mounting base 10, extending in the longitudinal direction (the fore-and-aft direction of the automobile 100) and made of a hard material having a harder hardness than the material constituting the mounting base 10. In addition, an exterior side band-shaped member 40 extending in the longitudinal direction (the fore-and-aft direction of the automobile 100) and made of a hard material having a harder hardness than the material constituting the mounting base 10 is provided on the tip side of the exterior side wall 12 of the mounting base 10. In this regard, the material constituting the mounting base 10 may be a micro-foamed solid rubber material (with a specific gravity of approximately 0.9 to 1.0), and a hard material having a harder hardness than the material constituting the mounting base 10 may be a solid rubber material (with a specific gravity of approximately 1.1 to 1.2).

[0031] The hard material used has a rigidity that, when a part of the weather strip 1 is attached to the flange F as shown in Fig. 6, even if the worker releases both hands, the weather strip 1 will not fall off the flange F under its own weight for a short period of time. The hard material may be made of rubber or resin.

[0032] As shown in Figure 3, the interior side belt-shaped member 30 has an interior side belt-shaped member tip portion 31 provided at the tip of the interior side wall 11 of the mounting base 10 and covering the tip side of the interior side wall 11 of the mounting base 10 in an L-shaped cross section, and an interior side belt-shaped member interior portion 32 extending from the interior end portion of the interior side belt-shaped member tip portion 31 along the interior side surface of the interior side wall 11 toward the bottom wall 13.

[0033] In addition, the width 31T of the interior side belt-shaped member tip portion 31 of the interior side belt-shaped member 30 is larger than the thickness 17T of the core material 17, and the interior side portion 32 of the interior side belt-shaped member extends further toward the bottom wall 13 than the interior side end portion 17a of the core material 17. Furthermore, the exterior side band member 40 is arranged to cover the tip side of the exterior side wall 12 of the mounting base 10 with an L-shaped cross section, and has an exterior side band member tip portion 41 arranged at the tip of the exterior side wall 12 of the mounting base 10, and an exterior side band member exterior portion 42 extending from the exterior end of the exterior side band member tip portion 41 along the exterior side surface of the exterior side wall 12 toward the bottom wall 13, and the width 41T of the exterior side band member tip portion 41 of the exterior side band member 40 is greater than the thickness 17T of the core material 17.

[0034] In addition, the exterior side belt-shaped member 40 constitutes the second root portion 22 of the hollow seal portion 20 . In particular, the bottom wall 13 side of the second base portion 22 is formed by the lower end portion 42a of the exterior portion 42 of the exterior band member 40, and gradually becomes thicker as it approaches the exterior side wall 12 of the mounting base 10, and has a slight upward convex curve.

[0035] In addition, the base portion 16a1 of the vehicle-exterior first protrusion piece 16a, which is one of the protrusion pieces 16 provided on the vehicle-exterior side wall 12 of the mounting base 10, covers the vehicle-exterior band-shaped member tip portion 41 from above, and the upper surface of the base portion 16a1 is in direct elastic contact with the body (body panel) B of the automobile 100.

[0036] The weatherstrip 1 configured in this manner comprises a mounting base 10 and a hollow seal portion 20, and the mounting base 10 has embedded therein a core material 17 of a type that can be separated into pieces inside. An interior side band-shaped member 30 made of a hard material having a harder material than the material constituting the mounting base 10 is provided at the tip side of the interior side wall 11 of the mounting base 10, and an exterior side band-shaped member 40 made of a hard material having a harder material than the material constituting the mounting base 10 is provided at the tip side of the exterior side wall 12 of the mounting base 10. As a result, the rigidity of the areas where the interior side band-shaped member 30 and the exterior side band-shaped member 40 are set is improved and they are less likely to stretch. Therefore, when the weatherstrip 1 is temporarily assembled to the flange F, the weatherstrip 1 is firmly attached to the flange F, and as shown by the dotted line in Figure 6, the amount of sagging due to its own weight is smaller than that of the weatherstrip 50 (solid line) shown in the conventional example, and the weatherstrip 1 does not easily fall off from the flange F within a short period of time. This allows the work to be done by one worker. In other words, when the weatherstrip 1 is temporarily assembled to the flange F, the worker does not need to constantly hold down the temporarily assembled part with one hand, and even if both hands are removed from the weatherstrip 1, the weatherstrip 1 will not fall from the flange F, so the worker can work efficiently using both hands.

[0037] In addition, the interior side band-shaped member 30 has an interior side band-shaped member tip portion 31 provided at the tip of the interior side wall 11 of the mounting base 10 and covering the tip side of the interior side wall 11 of the mounting base 10 in an L-shaped cross section, and an interior side band-shaped member interior portion 32 extending from the interior end of the interior side band-shaped member tip portion 31 along the interior side surface of the interior side wall 11 toward the bottom wall 13 side.Therefore, the rigidity of both ends of the mounting base 10 is significantly improved, and the ends of the mounting base 10 do not easily open and are less likely to stretch. Therefore, the workability in assembling the weather strip 1 to the flange F is improved.

[0038] In addition, the width 31T of the interior side band member tip 31 of the interior side band member 30 is greater than the thickness 17T of the core material 17, and the interior side portion 32 of the interior side band member extends further toward the bottom wall 13 than the interior side end 17a of the core material 17, and further, the exterior side band member 40 has an exterior side band member tip portion 41 provided at the tip of the exterior side wall 12 of the mounting base 10 and covering the tip side of the exterior side wall 12 of the mounting base 10 with an L-shaped cross section, and an exterior side portion 42 of the exterior side band member extending from the exterior end of the exterior side band member tip portion 41 along the exterior side surface of the exterior side wall 12 toward the bottom wall 13, and the width 41T of the exterior side band member tip portion 41 of the exterior side band member 40 is greater than the thickness 17T of the core material 17, so that the rigidity at both ends of the mounting base 10 is further greatly improved.

[0039] Furthermore, since the exterior belt-shaped member 40 constitutes the second root portion 22 of the hollow seal portion 20, the rigidity of the second root portion 22 of the hollow seal portion 20 is improved.

[0040] Furthermore, the base portion 16a1 of the exterior first protrusion piece 16a, which extends from the tip of the exterior side wall 12 of the mounting base 10 toward the interior side of the vehicle, covers the exterior band-shaped member tip portion 41 and elastically contacts the body B of the automobile 100, thereby improving the water-proof performance of the weatherstrip 1 against the flange F.

[0041] In addition, the bottom wall side of the second root portion 22 of the hollow seal portion 20 is formed by the exterior portion 42 of the exterior band member 40, and the lower end portion 42a of the exterior portion 42 of the exterior band member gradually becomes thicker as it approaches the exterior side wall 12 of the mounting base 10, thereby enabling the hollow seal portion 20 to be firmly supported.

[0042] In the weatherstrip 1 of this embodiment, as shown in Figure 2, the interior side portion 32 of the interior side band member 30 is arranged to extend from the interior side of the interior side band member tip portion 31 toward the bottom wall 13 to approximately the center of the interior side wall 11 of the mounting base 10, but as shown in Figure 4, it may be made to extend along the entire interior side of the interior side wall 11 to the base of the lip portion 18, or it may be made to extend from half of the interior side wall 11 toward the bottom wall 13, i.e., downward, even if it does not reach the base of the lip portion 18. Also, in Figure 2, the exterior-side portion 42 of the exterior-side band-shaped member 40 extends slightly toward the bottom wall 13 from the exterior side of the exterior-side band-shaped member tip portion 41, but as shown in Figure 4, the exterior-side portion 42 of the exterior-side band-shaped member may extend from below the second root portion 22 of the hollow seal portion 20 to above the first root portion 21, or it may extend toward the bottom wall 13, i.e., downward, from half of the exterior-side side wall 12, even if it does not reach the first root portion 21.

[0043] In this embodiment, the position, size and shape of the tip 15a of the protrusion piece 15 on the vehicle interior side are specified to make it easier to assemble to the flange F, but if an interior band-shaped member 30 made of a hard material harder than the material constituting the mounting base 10 is provided on the tip side of the interior side wall 11 of the mounting base 10, and an exterior band-shaped member 40 made of a hard material harder than the material constituting the mounting base 10 is provided on the tip side of the exterior side wall 12 of the mounting base 10, this alone will improve the rigidity at both ends of the mounting base 10 and increase the holding force against the flange F, so the shape etc. of the protrusion pieces 15, 16 may be, for example, a general cross-sectional shape similar to that shown in the conventional example (Figure 5).

[0044] Furthermore, when a break type core material 17 is used, the holding force of the mounting base 10 of the weatherstrip 1 against the flange F is significantly reduced compared to when a connected type core material is used, so it is particularly effective to provide an interior side band member 30 and an exterior side band member 40 at both ends of the mounting base 10, but it is also possible to further increase the holding force by providing an interior side band member 30 and an exterior side band member 40 at both ends of the mounting base 10 in which the connected type core material is embedded.

[0045] Furthermore, the weather strip 1 of this embodiment has been described as being attached to a flange F provided along the peripheral edge of the opening of a sliding door D in the body B of an automobile 100, but it is also applicable to being attached to a flange F provided along the peripheral edge of the opening of a side door. [Explanation of symbols]

[0046] 1 Weather strip 10 Mounting base 11 Car interior side wall 12 Outside side wall 13 Bottom wall 15 Projection strip 15a Tip of protrusion 15b Top side 15c Bottom side 16 Projection strip 16a First protruding strip on the outside of the vehicle 16a1 Base of the first outer rib 16b Second protruding strip on the outside of the vehicle 16bE Tip of the second protruding strip on the outside of the vehicle 16c Third protruding strip on the outside of the vehicle 16cE Tip of the third rib on the outside of the vehicle 17 Core material 17a Inner end of core material 17b Outside end of core material 17T Core thickness 18 Lip 20 Hollow seal part 21 First base 22 Second base 30 Vehicle interior belt-shaped member 31 Vehicle interior belt-shaped member tip 31T Width of the end of the belt-shaped member inside the vehicle 32 Vehicle interior belt-shaped member Vehicle interior portion 40 Vehicle exterior belt-shaped member 41 End of outer belt-shaped member 41T Width of outer belt member tip 42 Vehicle exterior belt-shaped member Vehicle exterior portion 42a: Lower end of outer side belt member 50 Weather strip 60 Mounting base 61 Car interior side wall 62 Outside side wall 63 Bottom wall 65 Projection strip 66 Lip 67 Core material 70 Hollow seal part 75 Belt-shaped member 100 Automobiles B Body D Door F flange K Virtual line R region S Sealer

Claims

1. A weather strip comprising: a mounting base portion which is attached to a flange provided along the periphery of a door opening of an automobile body, the mounting base portion having a substantially U-shaped cross section and a bottom wall connecting an interior side wall, an exterior side wall, and both side walls, the mounting base portion having a core material bent into a substantially U-shape and embedded therein, the interior sides of both side walls each having a protruding piece that contacts a surface of the flange, and a hollow seal portion which is extruded integrally with the mounting base on an exterior surface of the exterior side wall of the mounting base, the hollow seal portion being in elastic contact with the door when the door is closed, An interior side band-shaped member is provided at a tip side of the interior side wall of the mounting base, the band-shaped member extending in the longitudinal direction and made of a hard material having a harder property than a material constituting the mounting base, a vehicle exterior belt-shaped member extending in the longitudinal direction and made of a hard material having a harder property than a material constituting the mounting base is provided at a tip side of the vehicle exterior side wall of the mounting base.

2. a weather strip that is attached to a flange provided along the periphery of a door opening of an automobile body, the weather strip comprising a mounting base having a generally U-shaped cross section and extending in the longitudinal direction, the mounting base being made up of a bottom wall connecting an interior side wall, an exterior side wall, and both side walls; a core material bent into a generally U-shape and embedded inside the mounting base, protruding strips being in contact with the faces of the flanges on the insides of both side walls, and a hollow seal portion being extruded integrally with the mounting base on an exterior surface of the exterior side wall of the mounting base and elastically contacting the door when the door is closed, the core material being separated into pieces within the mounting base after extrusion, An interior side band-shaped member is provided at a tip side of the interior side wall of the mounting base, the band-shaped member extending in the longitudinal direction and made of a hard material having a harder property than a material constituting the mounting base, a vehicle exterior belt-shaped member extending in the longitudinal direction and made of a hard material having a harder property than a material constituting the mounting base is provided at a tip side of the vehicle exterior side wall of the mounting base.

3. 3. The weather strip according to claim 1, wherein the interior side band member has an interior side band member tip portion provided at the tip of the interior side wall of the mounting base that covers the tip side of the interior side wall of the mounting base in an L-shaped cross section, and an interior side band member interior portion extending from the interior side end portion of the interior side band member tip portion toward the bottom wall side along the interior side surface of the interior side wall.

4. a width of the interior side belt-shaped member tip end portion of the interior side belt-shaped member is greater than a thickness of the core material, and an interior side portion of the interior side belt-shaped member extends to the bottom wall side beyond the interior side end portion of the core material, the exterior-side belt-shaped member has an exterior-side belt-shaped member tip portion provided at the tip of the exterior-side wall of the mounting base and covering the tip side of the exterior-side side wall of the mounting base in an L-shaped cross section, and an exterior-side belt-shaped member exterior portion extending from the exterior end portion of the exterior-side belt-shaped member tip portion toward the bottom wall along the exterior side surface of the exterior-side side wall, 4. The weather strip according to claim 3, wherein a width of the outer-vehicle-exterior belt-shaped member at a tip end portion of the outer-vehicle-exterior belt-shaped member is greater than a thickness of the core material.

5. A weather strip as described in claim 1 or 2, characterized in that of the two root portions of the hollow seal portion relative to the vehicle exterior side wall of the mounting base, a first root portion is provided on the bottom wall side of the vehicle exterior side wall of the mounting base and a second root portion is provided at the tip of the vehicle exterior side wall of the mounting base, and the vehicle exterior band-shaped member constitutes the second root portion.

6. 4. The weatherstrip according to claim 3, wherein one of the protrusion pieces provided on the vehicle-exterior side wall of the mounting base is a vehicle-exterior first protrusion piece extending from a tip of the vehicle-exterior side wall of the mounting base toward the vehicle interior, and a base portion of the vehicle-exterior first protrusion piece covers a tip portion of the vehicle-exterior band-shaped member and elastically contacts the automobile body.

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