Sealing strip

Abstract

The invention provides a sealing strip, which further improves the retaining force on a flange and enables the assembly operation to be easy. The sealing strip is provided with a mounting base part and a hollow sealing part, the mounting base part is mounted on a flange arranged along the periphery of a door opening of an automobile body and comprises an automobile inner side wall, an automobile outer side wall and a bottom wall, the section of the mounting base part is roughly U-shaped, and the mounting base part extends in the length direction. The hollow sealing part is embedded in the interior of the installation base part and provided with protruding strip pieces on the inner sides of the two side walls, and the hollow sealing part makes elastic contact with the vehicle door when the vehicle door is closed. The front end side of the vehicle inner side wall of the installation base part is provided with a vehicle inner side band-shaped component which extends along the length direction and is made of a hard material with the hardness higher than that of the material forming the installation base part. The front end side of the vehicle outer side wall of the mounting base part is provided with a vehicle outer side band-shaped component which extends along the length direction and is made of a hard material with the hardness higher than that of the material forming the mounting base part.

Description

Technical Field

[0001] The present invention relates to a sealing strip which is installed along a door opening of a vehicle body and elastically contacts with the door when the door is closed to seal the inside and outside of the vehicle. Background Art

[0002] A flange F is provided along the periphery of the door opening of the automobile body. Figure 5 The sealing strip 50 shown in FIG. Figure 3 ).

[0003] Such a sealing strip 50 includes: a mounting base 60 with a roughly U-shaped cross-section, which is inserted into a flange F provided along the periphery of the opening of a side door or a sliding door of a car and mounted on the flange F, and includes an inner side wall 61, an outer side wall 62, and a bottom wall 63 connecting the two side walls 61 and 62; a hollow sealing portion 70, which is integrally formed on the outer side wall 62 of the mounting base 60 and elastically contacts the door when the door is closed.

[0004] A plurality of protruding strips 65 are provided inside the two side walls 61 and 62 of the mounting base 60 to contact the surface of the flange F during insertion, and a tongue-shaped lip 66 is provided on the vehicle inner side wall 61. In addition, a core material 67 bent into a substantially U shape is embedded inside the mounting base 60.

[0005] As the core material 67, there is a structure in which it is not scattered and separated after the extrusion vulcanization molding of the sealing strip 50 but exists in the same state inside the installation base 60 (so-called connecting type) or a structure in which a component with a plurality of connecting parts is provided and has a fishbone shape and the connecting parts are scattered and separated inside the installation base 60 after the extrusion vulcanization molding of the sealing strip 50 (so-called disconnecting type).

[0006] The sealing strip 50 using the connecting type core material 67 is in a connected state without being separated in the mounting base 60, so it hardly stretches even when it is pulled in the length direction. As a result, the holding force is excellent. In addition, due to the lightweighting of automobiles in recent years, the core material 67 of the sealing strip 50 has begun to use a thinner plate thickness than before. Since the connecting type core material 67 also needs to be in a connected state when assembled to the automobile, it is necessary to use a metal material with high rigidity, such as a high-tensile material, so that even a thin connecting portion will not break. Generally speaking, high-tensile materials are expensive, so the cost increases.

[0007] In contrast, the sealing strip 50 using the disconnected core material 67 is easily stretched when pulled in the longitudinal direction because the core material 67 is separated in the mounting base 60. As a result, there is a problem that after being mounted on the flange F with a small holding force, it is easy to fall off in a short time. In addition, in the case of the disconnected core material 67, even if the plate thickness is thin, it only needs to be connected when the sealing strip 50 is extruded and vulcanized. Therefore, it is not necessary to use a high-tensile material that is a metal material with high rigidity, and it is possible to use a conventional metal material with relatively low raw material cost, which can suppress the manufacturing cost.

[0008] In addition, when the holding force is small, such as Figure 6 As shown by the solid line in the middle, it is easy to bend and sag, so the assembly work requires two workers. Figure 6 As shown, when the weather strip 50 is temporarily assembled on the flange F, the weather strip 50 is easy to fall off from the flange F in a short time, so the operator needs to keep pressing the temporarily assembled portion with one hand, which makes it difficult for one operator to perform the work.

[0009] In Patent Document 1, Figure 5 As shown, a strip-shaped member 75 made of a hard material extending in the length direction is provided on the vehicle interior side of the terminal portion of the vehicle interior side wall 61 of the mounting base 60, and the vehicle exterior side wall 62 is pressed against the surface of the flange F, thereby improving the holding force. However, this is a structure related to the structure of the corner portion of the sealing strip 50, and is not a structure that fully improves the holding force at the straight portion, and the poor assembly workability has not changed.

[0010] Prior art literature

[0011] Patent Literature

[0012] Patent document 1: Japanese Patent Application Publication No. 2008-230595. Summary of the invention

[0013] An object of the present invention is to provide a weather strip that has a further improved holding force on a flange and facilitates assembly workability.

[0014] To achieve the above-mentioned purpose, the sealing strip (1) of the present invention comprises a mounting base (10) and a hollow sealing portion (20). The mounting base (10) is mounted on a flange (F) provided along the periphery of the opening of a door (D) of a vehicle body (B) of an automobile (100), and comprises a vehicle interior side wall (11), a vehicle exterior side wall (12), and a bottom wall (13) connecting the two side walls (11, 12). The mounting base (10) has a substantially U-shaped cross section and extends in a longitudinal direction. A core material (17) bent into a substantially U-shape is embedded in the interior of the mounting base (10), and protruding strips (15, 16) in contact with the surface of the flange (F) are respectively provided on the inner sides of the two side walls (11, 12), and the hollow sealing portion (20) is extruded integrally with the mounting base (10) on the vehicle outer side surface of the vehicle outer side wall (12) of the mounting base (10), and elastically contacts the vehicle door (D) when the vehicle door (D) is closed, wherein:

[0015] A vehicle interior belt-shaped member (30) extending along the longitudinal direction and made of a hard material having a higher hardness than the material constituting the mounting base (10) is provided on the front end side of the vehicle interior side wall (11) of the mounting base (10), and

[0016] A vehicle-exterior belt-shaped member (40) extending along the longitudinal direction and made of a hard material having a higher hardness than the material constituting the mounting base (10) is provided on the front end side of the vehicle-exterior side wall (12) of the mounting base (10).

[0017] In addition, the sealing strip (1) of the present invention comprises a mounting base (10) and a hollow sealing portion (20), wherein the mounting base (10) is mounted on a flange (F) provided along the periphery of the opening of a door (D) of a vehicle body (B) of an automobile (100), and comprises a vehicle interior side wall (11), a vehicle exterior side wall (12), and a bottom wall (13) connecting the two side walls (11, 12), wherein the cross section of the mounting base (10) is substantially U-shaped and the mounting base (10) extends in the longitudinal direction, and a hollow sealing portion (20) is embedded in the interior of the mounting base (10). A core material (17) is bent into a substantially U-shape, and protruding strips (15, 16) are respectively provided on the inner sides of the two side walls (11, 12) and are in contact with the surface of the flange (F). The hollow sealing portion (20) is extruded integrally with the mounting base (10) on the vehicle outer side surface of the vehicle outer side wall (12) of the mounting base (10), and is in elastic contact with the vehicle door (D) when the vehicle door (D) is closed. The core material (17) is separated in pieces in the mounting base (10) after extrusion molding, and is characterized in that:

[0018] A vehicle interior belt-shaped member (30) extending along the longitudinal direction and made of a hard material having a higher hardness than the material constituting the mounting base (10) is provided on the front end side of the vehicle interior side wall (11) of the mounting base (10), and

[0019] A vehicle-exterior belt-shaped member (40) extending along the longitudinal direction and made of a hard material having a higher hardness than the material constituting the mounting base (10) is provided on the front end side of the vehicle-exterior side wall (12) of the mounting base (10).

[0020] In addition, the present invention is characterized in that the vehicle interior belt-shaped member (30) covers the front end side of the vehicle interior side wall (11) of the mounting base (10) with an L-shaped cross-section, and has a vehicle interior belt-shaped member front end portion (31) arranged at the front end of the vehicle interior side wall (11) of the mounting base (10), and a vehicle interior belt-shaped member vehicle interior portion (32) extending from the vehicle interior end portion of the vehicle interior belt-shaped member front end portion (31) along the vehicle interior side of the vehicle interior side wall (11) toward the bottom wall (13) side.

[0021] In addition, the present invention is characterized in that the width (31T) of the front end portion (31) of the vehicle interior belt-shaped member (30) is larger than the thickness (17T) of the core material (17), and the vehicle interior side portion (32) of the vehicle interior belt-shaped member extends to a position closer to the bottom wall (13) than the vehicle interior side end portion (17a) of the core material (17).

[0022] The vehicle exterior strip member (40) covers the front end side of the vehicle exterior side wall (12) of the mounting base (10) with an L-shaped cross section, and comprises a vehicle exterior strip member front end portion (41) provided at the front end of the vehicle exterior side wall (12) of the mounting base (10) and a vehicle exterior strip member vehicle exterior portion (42) extending from the vehicle exterior end portion of the vehicle exterior strip member front end portion (41) along the vehicle exterior surface of the vehicle exterior side wall (12) toward the bottom wall (13), and,

[0023] The width (41T) of the front end portion (41) of the vehicle exterior belt-shaped member (40) is larger than the thickness (17T) of the core material (17).

[0024] In addition, the present invention is characterized in that, of the two root portions (21, 22) of the hollow sealing portion (20) on the vehicle outer side surface of the vehicle outer side wall (12) relative to the mounting base (10), the first root portion (21) is arranged on the bottom wall (13) side of the vehicle outer side wall (12) of the mounting base (10), and the second root portion (22) is arranged at the front end of the vehicle outer side wall (12) of the mounting base (10), and the vehicle outer side strip member (40) constitutes the second root portion (22).

[0025] In addition, the present invention is characterized in that one of the protrusions (16) provided on the vehicle outer side wall (12) of the mounting base (10) is a first vehicle outer side protrusion (16a) extending from the front end of the vehicle outer side wall (12) of the mounting base (10) toward the vehicle inner side, and the root (16a1) of the first vehicle outer side protrusion (16a) covers the front end portion (41) of the vehicle outer side strip-shaped member and is in elastic contact with the vehicle body (B) of the automobile (100).

[0026] In addition, the reference numerals in parentheses indicate corresponding elements or corresponding matters described in the drawings and the detailed description to be described later.

[0027] According to the present invention, since a vehicle-inside strip-shaped member made of a hard material having a higher hardness than the material constituting the mounting base is provided at the front end side of the vehicle-inside side wall of the mounting base of the sealing strip, and a vehicle-outside strip-shaped member made of a hard material having a higher hardness than the material constituting the mounting base is provided at the front end side of the vehicle-outside side wall of the mounting base, the rigidity of the portion where the vehicle-inside strip-shaped member and the vehicle-outside strip-shaped member are set is improved and it is difficult to stretch.

[0028] Therefore, when the sealing strip is temporarily assembled on the flange, since the sealing strip is firmly assembled on the flange and is not easily removed from the flange, the operation can be performed by one operator. In other words, when the sealing strip is temporarily assembled on the flange, the operator does not need to keep pressing the temporarily assembled portion with one hand, and even if both hands are removed from the sealing strip, the sealing strip will not fall from the flange, so the operator can perform the operation using both hands, which is very efficient.

[0029] In particular, when the core material is composed of a so-called disconnected type material in which the sealing strip is scattered and separated in the mounting base after vulcanization, the holding force on the flange is greatly reduced compared with a so-called connected type structure in which the sealing strip is extruded and vulcanized and exists in the mounting base without separation but remains unchanged. However, by arranging an inner-vehicle strip member and an outer-vehicle strip member composed of a hard material having a higher hardness than the material constituting the mounting base at both ends of the mounting base as in the present invention, the rigidity of the two ends of the mounting base is increased and it becomes difficult to stretch, thereby dramatically improving the holding force.

[0030] As described above, the present invention is particularly effective when applied to a weather strip having an attachment base and a split type structure in which a core material is embedded in the attachment base.

[0031] In addition, according to the present invention, since the vehicle-interior belt-like member covers the front end side of the vehicle-interior side wall of the mounting base with an L-shaped cross-section, and has a vehicle-interior belt-like member front end portion arranged at the front end of the vehicle-interior side wall of the mounting base, and a vehicle-interior belt-like member vehicle-interior portion extending from the vehicle-interior end portion of the vehicle-interior belt-like member front end portion along the vehicle-interior side of the vehicle-interior side wall toward the bottom wall side, the rigidity of the two ends of the mounting base is significantly improved, and the ends of the mounting base are not easy to open and are difficult to stretch.

[0032] Therefore, the assembling workability when assembling the weather strip to the flange is improved.

[0033] In addition, according to the present invention, since the width of the front end portion of the vehicle-inside strip-shaped member of the vehicle-inside strip-shaped member is larger than the thickness of the core material, the vehicle-inside portion of the vehicle-inside strip-shaped member extends to a position closer to the bottom wall side than the vehicle-inside end portion of the core material, the vehicle-outside strip-shaped member covers the front end side of the vehicle-outside side wall of the mounting base with an L-shaped cross-section, and has a vehicle-outside strip-shaped member front end portion arranged at the front end of the vehicle-outside side wall of the mounting base, and a vehicle-outside portion of the vehicle-outside strip-shaped member extending from the vehicle-outside end portion of the front end portion of the vehicle-outside strip-shaped member along the vehicle-outside surface of the vehicle-outside side wall toward the bottom wall side, and the width of the front end portion of the vehicle-outside strip-shaped member is larger than the thickness of the core material, so the rigidity of both ends of the mounting base is greatly improved.

[0034] Furthermore, according to the present invention, since the vehicle outer side strip-shaped member constitutes the second root portion of the hollow seal portion, the rigidity of the second root portion of the hollow seal portion is improved.

[0035] In addition, according to the present invention, since the root of the first protruding strip on the outside of the vehicle extending from the front end of the side wall on the outside of the vehicle mounting base toward the inside of the vehicle covers the front end of the strip-shaped member on the outside of the vehicle and elastically contacts the vehicle body, the performance of preventing water leakage of the sealing strip relative to the flange is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a side view of a car equipped with the weather strip according to the embodiment of the present invention.

[0037] Figure 2 The sealing strip according to the embodiment of the present invention is shown in FIG. Figure 1 AA section view.

[0038] Figure 3 It is shown Figure 2 An enlarged cross-sectional view of a main portion of the sealing strip is shown.

[0039] Figure 4 Another sealing strip according to an embodiment of the present invention is shown. Figure 1 AA section view.

[0040] Figure 5 It is a cross-sectional view showing a weather strip according to a conventional example.

[0041] Figure 6 This is a schematic diagram showing the bending state of the weather strip of the present invention and the weather strip of the related art, which are attached to the flange, in comparison.

[0042] Description of Reference Numerals

[0043] 1 Sealing strip

[0044] 10 Mounting base

[0045] 11 Inner side wall

[0046] 12. External side wall

[0047] 13 bottom wall

[0048] 15 Raised strip

[0049] 15a Front end of the protruding strip

[0050] 15b Upper side

[0051] 15c Lower side

[0052] 16 Raised strip

[0053] 16a First protruding strip on the outside of the vehicle

[0054] 16a1 The root of the first protruding strip on the outer side of the vehicle

[0055] 16b Second protruding strip on the outside of the vehicle

[0056] 16bE Front end of the second protruding strip on the outside of the vehicle

[0057] 16c The third protruding strip on the outside of the vehicle

[0058] 16cE Front end of the third ridge on the outside of the vehicle

[0059] 17 core material

[0060] 17a Inner side end of core material

[0061] 17b Outboard end of core material

[0062] 17T Core thickness

[0063] 18 Lips

[0064] 20 Hollow sealing part

[0065] 21 First root

[0066] 22 Second root

[0067] 30 Inner strip member

[0068] 31 Front end of the inner strip member

[0069] 31T Width of the front end of the inner side strip

[0070] 32 Inner strip member Inner part of vehicle

[0071] 40 Outer side strip

[0072] 41 Front end of the outer side strip

[0073] 41T Width of the front end of the outer side strip

[0074] 42 Vehicle outer strip member Vehicle outer side

[0075] 42a Lower end of the vehicle outer side strip member vehicle outer side portion

[0076] 50 Sealing strip

[0077] 60 Mounting base

[0078] 61 Inner side wall

[0079] 62 Vehicle outer side wall

[0080] 63 bottom wall

[0081] 65 protruding strip

[0082] 66 Lips

[0083] 67 core material

[0084] 70 Hollow sealing part

[0085] 75 Strip member

[0086] 100 Car

[0087] B Body

[0088] D Door

[0089] F Flange

[0090] K Virtual Line

[0091] R Region

[0092] S sealant DETAILED DESCRIPTION

[0093] Referring to the drawings, a weather strip 1 according to an embodiment of the present invention will be described with reference to an example in which the weather strip 1 is applied to an automobile 100 having a sliding door D. In addition, the same reference numerals are given to the same parts as those shown in the related art.

[0094] like Figure 1 to Figure 3 As shown, the weather strip 1 of the embodiment of the present invention comprises: a mounting base 10, which is inserted into a flange F provided along the periphery of the door opening of the vehicle body B of the automobile 100 and mounted on the flange F; a hollow sealing portion 20, which is provided on the mounting base 10 and elastically contacts the door D when the sliding door D is closed; and is manufactured by integrally extruding the mounting base 10 and the hollow sealing portion 20. The flange F is provided along the periphery of the door opening of the vehicle body B of the automobile 100, and is provided at the bottom of the vehicle body B. Figure 2 2 shows a cross-sectional shape of a weather strip 1 mounted on a flange F extending horizontally in the front-rear direction of the automobile 100 at an upper side portion of the automobile 100 .

[0095] The mounting base 10 includes an in-vehicle side wall 11, an out-vehicle side wall 12, and a bottom wall 13 connecting the two side walls 11 and 12. The cross section is substantially U-shaped and extends along the longitudinal direction (front-rear direction of the vehicle 100). The mounting base 10 is formed of a micro-foam material of solid rubber such as EPDM. In addition, a plurality of protruding strips 15 and 16 are respectively provided on the inner side of the two side walls 11 and 12 (the side opposite to the flange F) to contact the surface of the flange F during insertion. In addition, a lip 18 with a tongue-shaped cross section extending from the connection portion of the in-vehicle side wall 11 and the bottom wall 13 to the in-vehicle side is provided on the in-vehicle side of the in-vehicle side wall 11. In addition, a core material 17 bent into a substantially U-shape is embedded in the mounting base 10.

[0096] As the core material 17, a herringbone-shaped member having a plurality of connecting portions is used, and a structure (so-called breakaway type) is used in which the connecting portions are separated and dispersed inside the mounting base 10 after the weather strip 1 is extrusion-vulcanized.

[0097] The protruding strip 15 provided on the vehicle interior side wall 11 of the mounting base 10 is in the shape of a lip extending from the front end of the vehicle interior side wall 11 toward the vehicle exterior side, and comes into elastic contact with the vehicle interior side surface of the flange F.

[0098] The protruding strips 16 provided on the vehicle outer side wall 12 of the mounting base 10 include a first vehicle outer side protruding strip 16a, a second vehicle outer side protruding strip 16b, and a third vehicle outer side protruding strip 16c, which are provided at intervals from each other and are elastically in contact with the vehicle outer side surface of the flange F. The first vehicle outer side protruding strip 16a is a lip-shaped strip extending from the front end of the vehicle outer side wall 12 toward the vehicle inner side, and is elastically in contact with the flange F in a fully bent state. In contrast, the second vehicle outer side protruding strip 16b and the third vehicle outer side protruding strip 16c are block-shaped, and are in contact with the flange F and supported by the flange F. The second vehicle outer side protruding strip 16b and the third vehicle outer side protruding strip 16c are formed of a micro-foam material of solid rubber like the mounting base 10, while the first vehicle outer side protruding strip 16a is formed of a sponge rubber material.

[0099] The protrusion piece 15 on the inside of the vehicle has a larger cross-sectional shape than the protrusion piece 16 on the outside of the vehicle (the first protrusion piece 16a on the outside of the vehicle, the second protrusion piece 16b on the outside of the vehicle, and the third protrusion piece 16c on the outside of the vehicle). Its front end 15a, before elastically contacting the flange F, is arranged in an area R surrounded by the lower side surface of the second protrusion piece 16b on the outside of the vehicle, the upper side surface of the third protrusion piece 16c on the outside of the vehicle, the virtual line K connecting the front end 16bE of the second protrusion piece 16b on the outside of the vehicle and the front end 16cE of the third protrusion piece 16c on the outside of the vehicle, and the inner side surface of the outer side wall 12 of the vehicle, and is located at a position biased towards the lower side surface of the second protrusion piece 16b on the outside of the vehicle.

[0100] The upper side 15b of the protrusion piece 15 extends substantially straight to the front end 15a. In contrast, the lower side 15c of the protrusion piece 15 extends substantially straight to the front end 15a, but is chamfered so that the thickness of the protrusion piece 15 gradually decreases toward the front end 15a and is curved upward.

[0101] In addition, a non-drying type sealant S is attached to the inner side of the bottom wall 13 of the mounting base 10 and adhered to the front end of the flange F. When the sealing strip 1 is mounted on the flange F, the protruding strip piece 15 is elastically contacted and flexed, but since the front end 15a of the protruding strip piece 15 is chamfered, it is almost not in contact with the sealant S. If a large amount of sealant S is adhered to the front end 15a of the protruding strip piece 15, the friction coefficient of the protruding strip piece 15 is reduced, and the holding force of the flange F is reduced due to the smoothness, which is not preferable. In addition, the sealant S may be omitted.

[0102] The hollow seal portion 20 is integrally provided on the vehicle outer side surface of the vehicle outer side wall 12 of the mounting base 10 so as to bulge toward the vehicle outer side, and is formed of a sponge rubber material such as EPDM.

[0103] Among the two roots 21 and 22 of the hollow sealing portion 20 located on the outer side surface of the outer side wall 12 of the mounting base 10, the first root portion 21 is arranged on the bottom wall 13 side of the outer side wall 12 of the mounting base 10 and is slightly offset from the connection portion between the outer side wall 12 and the bottom wall 13 to the front end side (upper side) of the outer side wall 12, and the second root portion 22 is arranged at the front end of the outer side wall 12 of the mounting base 10.

[0104] Furthermore, an in-vehicle belt-shaped member 30 is provided at the front end side of the in-vehicle side wall 11 of the mounting base 10 . The in-vehicle belt-shaped member 30 extends in the longitudinal direction (front-rear direction of the automobile 100 ) and is made of a harder material than the material constituting the mounting base 10 .

[0105] In addition, an outer side strip member 40 is provided at the front end side of the outer side wall 12 of the mounting base 10 . The outer side strip member 40 extends in the longitudinal direction (front-rear direction of the automobile 100 ) and is made of a harder material than the material constituting the mounting base 10 .

[0106] In addition, here, as the material constituting the mounting base 10, a micro-foam material of solid rubber (with a specific gravity of about 0.9 to 1.0) can be listed, and as a hard material having a higher hardness than the material constituting the mounting base 10, a solid rubber material (with a specific gravity of about 1.1 to 1.2) can be listed.

[0107] As the hard material, a material having the following degree of rigidity is used, that is, Figure 6 As shown, when a part of the weather strip 1 is mounted on the flange F, even if the operator takes both hands off, the weather strip 1 will not fall off the flange F due to its own weight in a short time. The hard material may be rubber or resin.

[0108] like Figure 3 As shown, the vehicle interior strip member 30 covers the front end side of the vehicle interior side wall 11 of the mounting base 10 with an L-shaped cross-section, and comprises: a vehicle interior strip member front end portion 31, which is arranged at the front end of the vehicle interior side wall 11 of the mounting base 10; and a vehicle interior side portion 32 of the vehicle interior strip member, which extends from the vehicle interior end portion of the vehicle interior strip member front end portion 31 along the vehicle interior side of the vehicle interior side wall 11 toward the bottom wall 13 side.

[0109] The width 31T of the front end portion 31 of the inner strip member 30 is larger than the thickness 17T of the core material 17 , and the inner strip member inner portion 32 extends to the bottom wall 13 side relative to the inner end 17 a of the core material 17 .

[0110] Moreover, the vehicle exterior strip member 40 is arranged to cover the front end side of the vehicle exterior side wall 12 of the mounting base 10 with an L-shaped cross-section, and has: a vehicle exterior strip member front end portion 41, which is arranged at the front end of the vehicle exterior side wall 12 of the mounting base 10; a vehicle exterior strip member vehicle exterior portion 42, which extends from the vehicle exterior end portion of the vehicle exterior strip member front end portion 41 along the vehicle exterior surface of the vehicle exterior side wall 12 toward the bottom wall 13 side; and a width 41T of the vehicle exterior strip member front end portion 41 of the vehicle exterior strip member 40 is larger than the thickness 17T of the core material 17.

[0111] In addition, the vehicle exterior side strip member 40 constitutes the second root portion 22 of the hollow seal portion 20 .

[0112] In particular, the bottom wall 13 side of the second root portion 22 is formed by the lower end portion 42a of the outer side strip member 40, and gradually becomes thicker as it approaches the outer side wall 12 of the mounting base 10, and is slightly convexly curved upward.

[0113] In addition, the root 16a1 of the first vehicle-outer side protrusion 16a, which is one of the protrusions 16 set on the vehicle-outer side wall 12 of the mounting base 10, covers the front end portion 41 of the vehicle-outer side strip member from above, and the upper surface of the root 16a1 is in direct elastic contact with the body (body panel) B of the automobile 100.

[0114] According to the sealing strip 1 constructed in this way, in the sealing strip 1 having the mounting base 10 and the hollow sealing portion 20 and having the core material 17 of the type scattered and separated embedded in the mounting base 10, since the vehicle-inside strip member 30 made of a hard material having a higher hardness than the material constituting the mounting base 10 is provided at the front end side of the vehicle-inside side wall 11 of the mounting base 10, and the vehicle-outside strip member 40 also made of a hard material having a higher hardness than the material constituting the mounting base 10 is provided at the front end side of the vehicle-outside side wall 12 of the mounting base 10, the rigidity of the parts where the vehicle-inside strip member 30 and the vehicle-outside strip member 40 are set is improved and becomes difficult to stretch.

[0115] Therefore, when the sealing strip 1 is temporarily assembled on the flange F, the sealing strip 1 is firmly assembled on the flange F, such as Figure 6 As shown by the dot-dash line, the amount of the weather strip 50 (solid line) hanging down due to its own weight is smaller than that of the weather strip 50 shown in the conventional example, and it is not easy to fall off from the flange F in a short time.

[0116] That is, when the sealing strip 1 is temporarily assembled on the flange F, the operator does not need to keep pressing the temporarily assembled portion with one hand, and even if both hands are separated from the sealing strip 1, the sealing strip 1 will not fall off the flange F, so the operator can perform the operation using both hands, which is very efficient.

[0117] In addition, since the vehicle-interior belt-like member 30 covers the front end side of the vehicle-interior side wall 11 of the mounting base 10 with an L-shaped cross-section, and has a vehicle-interior belt-like member front end portion 31 set at the front end of the vehicle-interior side wall 11 of the mounting base 10 and a vehicle-interior belt-like member vehicle-interior portion 32 extending from the vehicle-interior end portion of the vehicle-interior belt-like member front end portion 31 along the vehicle-interior side of the vehicle-interior side wall 11 toward the bottom wall 13 side, the rigidity of the two ends of the mounting base 10 is significantly improved, and the ends of the mounting base 10 will not be easily opened and are difficult to stretch.

[0118] As a result, the assembling workability when assembling the weather strip 1 to the flange F is improved.

[0119] In addition, since the width 31T of the front end portion 31 of the vehicle-inside strip-shaped member 30 is larger than the thickness 17T of the core material 17, the vehicle-inside portion 32 of the vehicle-inside strip-shaped member extends to a position closer to the bottom wall 13 side than the vehicle-inside end portion 17a of the core material 17, and the vehicle-outside strip-shaped member 40 covers the front end side of the vehicle-outside side wall 12 of the mounting base 10 with an L-shaped cross-section, and has a vehicle-outside strip-shaped member front end portion 41 set at the front end of the vehicle-outside side wall 12 of the mounting base 10 and a vehicle-outside strip-shaped member vehicle-outside portion 42 extending from the vehicle-outside end of the vehicle-outside strip-shaped member front end portion 41 along the vehicle-outside surface of the vehicle-outside side wall 12 toward the bottom wall 13 side, and the width 41T of the vehicle-outside strip-shaped member front end portion 41 of the vehicle-outside strip-shaped member 40 is larger than the thickness 17T of the core material 17, so the rigidity of the two ends of the mounting base 10 is further greatly improved.

[0120] Furthermore, since the vehicle exterior side strip 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.

[0121] Moreover, since the root 16a1 of the first protrusion piece 16a on the outside of the vehicle extending from the front end of the vehicle-exterior side wall 12 of the mounting base 10 toward the inside of the vehicle covers the front end 41 of the vehicle-exterior strip-shaped member and elastically contacts the body B of the automobile 100, the performance of preventing the sealing strip 1 from leaking relative to the flange F is improved.

[0122] In addition, since the bottom wall side of the second root portion 22 of the hollow sealing portion 20 is composed of the vehicle exterior strip member vehicle exterior portion 42 of the vehicle exterior strip member 40, the lower end portion 42a of the vehicle exterior strip member vehicle exterior portion 42 gradually becomes thicker as it approaches the vehicle exterior side wall 12 of the mounting base 10, thereby being able to firmly support the hollow sealing portion 20.

[0123] In addition, in the sealing strip 1 of the present embodiment, Figure 2 As shown in FIG. 1 , the vehicle interior side belt-shaped member vehicle interior side portion 32 of the vehicle interior side belt-shaped member 30 is arranged to extend from the vehicle interior side of the vehicle interior side belt-shaped member front end portion 31 toward the bottom wall 13 side to the approximate center of the vehicle interior side wall 11 of the mounting base 10, but as shown in FIG. Figure 4 As shown, it may extend over the entire inner side surface of the inner side wall 11 to the root of the lip 18 , or it may not reach the root of the lip 18 but extend to a position closer to the bottom wall 13 than half of the inner side wall 11 , that is, below.

[0124] The same is true for the vehicle outer side strip member vehicle outer side portion 42 of the vehicle outer side strip member 40. Figure 2 In the embodiment, the front end portion 41 of the belt-shaped member on the outside of the vehicle extends slightly toward the bottom wall 13 from the outside of the vehicle. Figure 4 As shown, the vehicle outer side strip member vehicle outer side portion 42 may extend from the lower side of the second root portion 22 of the hollow sealing portion 20 to a position reaching the upper side of the first root portion 21, or may extend to a position closer to the bottom wall 13 side, i.e., the lower side, than half of the vehicle outer side wall 12, although not reaching the first root portion 21.

[0125] In the present embodiment, the position, size and shape of the front end 15a of the protruding strip piece 15 on the vehicle interior side are determined so that it is easier to assemble it on the flange F. However, as long as the front end side of the vehicle interior side wall 11 of the mounting base 10 is provided with a vehicle interior side strip member 30 made of a hard material having a higher hardness than the material constituting the mounting base 10, and the front end side of the vehicle exterior side wall 12 of the mounting base 10 is also provided with a vehicle exterior side strip member 40 made of a hard material having a higher hardness than the material constituting the mounting base 10, the rigidity of both ends of the mounting base 10 is improved by this alone, and the holding force to the flange F is improved. Therefore, the shapes of the protruding strip pieces 15 and 16 can be made different from those in the conventional example ( Figure 5 ) are the same as the parts shown in FIG. 1 and have a general cross-sectional shape.

[0126] In addition, regarding the core material 17, when a disconnected type core material is used, the holding force of the mounting base 10 of the sealing strip 1 relative to the flange F is greatly reduced compared to a connected type core material. Therefore, it is particularly effective to provide an inner vehicle strip member 30 and an outer vehicle strip member 40 at both ends of the mounting base 10. However, it is also possible to provide an inner vehicle strip member 30 and an outer vehicle strip member 40 at both ends of the mounting base 10 in which a connected type core material is embedded to further improve the holding force.

[0127] In addition, the weather strip 1 of this embodiment is described as a weather strip installed on a flange F provided along the opening periphery of a sliding door D in the vehicle body B of the automobile 100, but it is also applicable to a weather strip installed on a flange F provided along the opening periphery of a side door.

Claims

1. A sealing strip having a mounting base and a hollow sealing portion, wherein the mounting base is mounted on a flange arranged along the periphery of a door opening of a vehicle body, and comprises an inner side wall, an outer side wall, and a bottom wall connecting the two side walls, wherein the cross section of the mounting base is roughly U-shaped and the mounting base extends along the length direction, a core material bent into a roughly U-shape is embedded in the interior of the mounting base, and protruding strips contacting the surface of the flange are respectively arranged on the inner sides of the two side walls, the hollow sealing portion is formed by integrally extruding the mounting base on the outer side surface of the outer side wall of the mounting base, and elastically contacts the door when the door is closed, characterized in that A vehicle interior belt-shaped member is provided at the front end side of the vehicle interior side wall of the mounting base, the vehicle interior belt-shaped member extending along the longitudinal direction and being made of a hard material having a higher hardness than the material constituting the mounting base, and A vehicle-exterior strip-shaped member is provided on the front end side of the vehicle-exterior side wall of the mounting base. The vehicle-exterior strip-shaped member extends along the longitudinal direction and is made of a hard material having a higher hardness than a material constituting the mounting base.

2. A sealing strip having a mounting base and a hollow sealing portion, wherein the mounting base is mounted on a flange arranged along the periphery of a door opening of a vehicle body, and comprises an inner side wall, an outer side wall, and a bottom wall connecting the two side walls, the cross-section of the mounting base being roughly U-shaped and the mounting base extending along the length direction, a core material bent into a roughly U-shape is embedded in the interior of the mounting base, and protruding strips contacting the surface of the flange are respectively provided on the inner sides of the two side walls, the hollow sealing portion is extruded integrally with the mounting base on the outer side surface of the outer side wall of the mounting base, and elastically contacts the door when the door is closed, the core material is a type of core material that is scattered and separated in the mounting base after extrusion molding, and is characterized in that A vehicle interior belt-shaped member is provided at the front end side of the vehicle interior side wall of the mounting base, the vehicle interior belt-shaped member extending along the longitudinal direction and being made of a hard material having a higher hardness than the material constituting the mounting base, and A vehicle-exterior strip-shaped member is provided on the front end side of the vehicle-exterior side wall of the mounting base. The vehicle-exterior strip-shaped member extends along the longitudinal direction and is made of a hard material having a higher hardness than a material constituting the mounting base.

3. The sealing strip according to claim 1 or 2, characterized in that: The vehicle interior belt-like member covers the front end side of the vehicle interior side wall of the mounting base with an L-shaped cross-section, and has a vehicle interior belt-like member front end portion arranged at the front end of the vehicle interior side wall of the mounting base, and a vehicle interior side portion of the vehicle interior belt-like member extending from the vehicle interior end portion of the vehicle interior belt-like member front end portion along the vehicle interior side of the vehicle interior side wall toward the bottom wall side.

4. The sealing strip according to claim 3, characterized in that: The width of the front end of the vehicle interior belt-shaped member is greater than the thickness of the core material, and the vehicle interior portion of the vehicle interior belt-shaped member extends to a position closer to the bottom wall than the vehicle interior end of the core material. The vehicle exterior strip-shaped member covers the front end side of the vehicle exterior side wall of the mounting base with an L-shaped cross section, and comprises a vehicle exterior strip-shaped member front end portion provided at the front end of the vehicle exterior side wall of the mounting base, and a vehicle exterior strip-shaped member vehicle exterior portion extending from the vehicle exterior end portion of the vehicle exterior strip-shaped member front end portion along the vehicle exterior surface of the vehicle exterior side wall toward the bottom wall side, and, The width of the front end portion of the vehicle exterior strip-shaped member is larger than the thickness of the core material.

5. The sealing strip according to claim 1 or 2, characterized in that: Of the two roots of the hollow sealing portion relative to the vehicle outer side wall of the mounting base, a first root is arranged on the bottom wall side of the vehicle outer side wall of the mounting base, and a second root is arranged at the front end of the vehicle outer side wall of the mounting base, and the vehicle outer side strip member constitutes the second root.

6. The sealing strip according to claim 3, characterized in that: One of the protrusions arranged on the vehicle outer side wall of the mounting base is a first vehicle outer side protrusion extending from the front end of the vehicle outer side wall of the mounting base toward the vehicle inner side, and the root of the first vehicle outer side protrusion covers the front end of the vehicle outer side strip member and is in elastic contact with the automobile body.

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