Sealing strip

Abstract

The sealing strip (17) is provided with a hollow sealing part (22) which abuts against the vehicle door (18) and can be compressed and deformed when the vehicle door (18) is closed; and an attachment part (21) for attaching the hollow seal part (22) to the periphery of the opening (14) of the vehicle body (11). The hollow seal section (22) has: a head side wall section (31) positioned on the opposite side from the attachment section (21); and bent sections (32) which are adjacent to both sides of the head side wall section (31) and which are formed so as to be more easily bent than the other sections of the hollow seal section (22). In the hollow seal section (22), a protruding section (33) protruding from the inner wall surface of the head side wall section (31) is formed of the same material as the hollow seal section (22), and the protruding section (33) is formed such that the tip of the protruding section (33) does not come into contact with the inner wall surface of the hollow seal section (22) when the hollow seal section (22) is in a compressive deformation state when the vehicle door (18) is closed.

Description

Technical Field

[0001] The present invention relates to a long sealing strip for sealing between the periphery of an opening of a vehicle body and an opening and closing member such as a door for opening and closing the opening when the opening and closing member is closed. Background Art

[0002] Usually, the sealing strip is configured to have a hollow sealing portion, which is installed at the periphery of the opening of the vehicle body and the installation position of any one of the opening and closing components such as the door. When the opening and closing component is closed, the hollow sealing portion abuts against the periphery of the opening of the vehicle body and any other of the opening and closing components and can be compressed and deformed. In this sealing strip, as described in patent document 1 (Japanese Patent Publication No. 2010-58637), it is known that there is a structure as follows: in order to improve sound insulation, a hollow cylinder wall portion formed by other materials is provided in the hollow sealing portion, and a plurality of wave-shaped concave and convex portions are formed on the inner circumferential surface of the cylinder wall portion. Moreover, in the sealing strip of the patent document 1, the cylinder wall portion is formed by a sponge material with a specific gravity lower than the specific gravity of the molding material of the hollow sealing portion, so that when the door is closed, the compression load of the hollow sealing portion will not be increased and the closing property of the door will not be deteriorated.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2010-58637 Summary of the invention

[0006] Technical problem that the invention aims to solve

[0007] Generally, the sealing strip is formed by extrusion molding of a polymer material. However, in the structure of the above-mentioned Patent Document 1, since the hollow sealing portion and the inner wall portion thereof are formed of different materials, it is necessary to add an extrusion molding device used when extruding the sealing strip, which has the disadvantages of making the molding equipment complicated and increasing the production cost.

[0008] Therefore, the problem to be solved by the present invention is to provide a sealing strip that can reduce the sound intruding into the vehicle without increasing the types of materials used to form the sealing strip, and prevent the compression load of the hollow sealing portion from increasing when the opening and closing component is closed, thereby preventing the closing performance of the opening and closing component from deteriorating.

[0009] Technical solutions to the problem

[0010] In order to solve the above-mentioned problems, the invention of technical solution 1 is a sealing strip, characterized in that when the opening and closing component is closed, the long sealing strip seals the periphery of the opening of the vehicle body and the opening and closing component that opens and closes the opening, and the sealing strip has: a hollow sealing portion, which is installed at the mounting position of the periphery of the opening of the vehicle body and any one of the opening and closing components, and when the opening and closing component is closed, the hollow sealing portion abuts against the periphery of the opening of the vehicle body and the other of the opening and closing components and can be compressed and deformed; and a mounting portion, which is used to The hollow sealing portion is installed at the installation position, and the hollow sealing portion comprises: a head side wall portion, which is located on the side opposite to the installation portion; and a bending portion, which is adjacent to both sides of the head side wall portion and is formed to bend when the opening and closing component is closed. In the hollow sealing portion, a protrusion protruding from the inner wall surface of the head side wall portion is formed of the same material as that of the hollow sealing portion, and the protrusion is formed so that when the hollow sealing portion is in a compressed and deformed state when the opening and closing component is closed, the end of the protrusion does not abut against the inner wall surface of the hollow sealing portion.

[0011] In this structure, a hollow cylindrical wall portion formed of other materials is not arranged in the hollow sealing portion, and the protrusion does not protrude from the curved portion of the hollow sealing portion, so that the compression load of the hollow sealing portion when the opening and closing member is closed can be prevented from increasing and the closing performance of the opening and closing member can be prevented from being deteriorated. In addition, in the hollow sealing portion, the protrusion protruding from the inner wall surface of the head side wall portion is formed of the same material as the hollow sealing portion, so there is no need to increase the types of materials for forming the sealing strip, and there is no need to increase the extrusion molding device used when extruding the sealing strip, and the production cost can be suppressed to a low level.

[0012] Furthermore, the protrusion protrudes from the inner wall surface of the head side wall portion so that the sound intruding into the hollow sealing portion from the head side wall portion of the hollow sealing portion can easily hit it. Therefore, when the opening and closing component is closed, the sound intruding into the hollow sealing portion hits the protrusion in the hollow sealing portion, so that the energy of the sound intruding into the hollow sealing portion can be attenuated and the sound intruding into the vehicle can be reduced. Furthermore, the protrusion in the hollow sealing portion is formed so that when the hollow sealing portion is in a compressed and deformed state when the opening and closing component is closed, the end of the protrusion does not abut against the inner wall surface of the hollow sealing portion, so that the space in the hollow sealing portion is not blocked by the protrusion, and the sound intruding into the hollow sealing portion can be prevented from being reflected and resonated in the narrow space blocked by the protrusion, thereby preventing the sound from being amplified.

[0013] Furthermore, the protrusion may be formed in a lip shape extending in the hollow sealing portion as in claim 2. By forming the protrusion in a lip shape, the sound intruding into the hollow sealing portion easily hits the protrusion, and the effect of reducing the sound can be improved.

[0014] In addition, as in technical solution 3, the protrusions may be formed at a plurality of locations on the inner wall surface of the head side wall at predetermined intervals. In this way, the probability of the sound intruding into the hollow sealing portion hitting the protrusions can be increased, thereby improving the effect of reducing the sound.

[0015] In this case, as in the fourth embodiment, the protrusions may be formed at two locations of the inner wall surface of the hollow sealing portion, the inner wall surface of the head side wall portion and the inner wall surface of the portion other than the head side wall portion, and when the opening and closing member is closed and the hollow sealing portion is in a state of compression and deformation, the protrusions do not abut against each other. In this way, by forming a plurality of protrusions on both the inner wall surface of the head side wall portion of the hollow sealing portion and the inner wall surface on the opposite side thereof, the energy of the sound intruding into the hollow sealing portion can be efficiently attenuated, thereby improving the effect of reducing the sound.

[0016] In addition, as in claim 5, the bent portion may be formed thinner than other portions of the hollow sealing portion. In this way, the bent portion of the hollow sealing portion can be easily formed to bend more easily than other portions.

[0017] The sealing strip of the present invention can be applied to a door opening piece installed at the periphery of the opening of a vehicle body as in claim 6. This is because the sealing strip used for the door opening piece has a large space in the hollow sealing portion, and a protrusion is easily formed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a side view showing a schematic structure of a vehicle equipped with a weather strip according to the first embodiment of the present invention.

[0019] Figure 2 For along Figure 1 A cross-sectional view taken along line AA of FIG. 1 is a view showing a state in which the front door is opened, in which a sealing strip installed on the periphery of the front door opening is shown.

[0020] Figure 3 For along Figure 1 A cross-sectional view taken along line AA of FIG. 1 is a view showing a state in which the front door is closed and a sealing strip installed on the periphery of the front door opening is shown.

[0021] Figure 4 This is a diagram showing the embodiment 2 of the present invention. Figure 2 .

[0022] Figure 5 This is a diagram showing the embodiment 3 of the present invention. Figure 2 .

[0023] Figure 6 It is a cross-sectional view showing a weather strip attached to a front door, which represents a fourth embodiment of the present invention.

[0024] Figure 7 1 is a cross-sectional view showing a weather strip installed at the periphery of a rear tailgate opening according to a fifth embodiment of the present invention.

[0025] Figure 8 It is a graph showing the results of an evaluation test of the sound reduction effect of Examples 1 to 3 and a comparative example. DETAILED DESCRIPTION

[0026] Several embodiments in which the mode for carrying out the present invention is applied to a vehicle door opening member will be described below.

[0027] Example 1

[0028] use Figures 1 to 3 Embodiment 1 of the present invention will be described.

[0029] like Figure 1 As shown, the vehicle body 11 is formed by joining a plurality of panels such as a roof panel 12 and a side panel 13. A flange 16 (see FIG. 1 ) is provided along the periphery of the front door opening 14 and the rear door opening 15 of the vehicle body 11. Figure 2 as well as Figure 3 ), a sealing strip 17 (door opening member) formed into a long strip by extrusion molding of an elastic polymer material is installed. When the front door 18 is closed, the front sealing strip 17 seals the gap between the periphery of the front door opening 14 and the front door 18 (opening and closing member) that opens and closes the front door opening 14. When the rear door 19 is closed, the rear sealing strip 17 seals the gap between the periphery of the rear door opening 15 and the rear door 19 (opening and closing member) that opens and closes the rear door opening 15.

[0030] Next, we will refer to Figure 2 and Figure 3 The structure of the sealing strip 17 will be described.

[0031] The sealing strip 17 of the first embodiment is formed of, for example, EPDM, but the sealing strip 17 is not limited thereto, and the sealing strip 17 may be made of a polymer material having elasticity, or may be made of a thermoplastic synthetic resin (including a thermoplastic elastomer). In addition, in order to reduce the weight of the sealing strip 17, a foaming agent or microcapsule may be mixed with a polymer material such as EPDM. As the foaming agent, for example, a chemical foaming agent such as OBSH may be used.

[0032] The sealing strip 17 includes: a mounting portion 21 having a U-shaped cross section, which is mounted on a flange 16 provided along the periphery of the front door opening 14 (rear door opening 15); and a cylindrical hollow sealing portion 22, which is integrally formed on the vehicle outer side of the mounting portion 21. The mounting portion 21 and the hollow sealing portion 22 extend along the length direction of the sealing strip 17 by extrusion molding.

[0033] The mounting portion 21 is integrally formed with a vehicle outer side wall portion 23, a vehicle inner side wall portion 24, and a top wall portion 25 connecting the two side walls 23 and 24, and a hollow sealing portion 22 is integrally formed on the outer side surface of the vehicle outer side wall portion 23. A core material 26 having a substantially U-shaped cross section formed of a metal plate or a resin plate is embedded in the mounting portion 21 across the two side walls 23 and 24 by composite extrusion molding.

[0034] A plurality of convex portions 27 protruding toward the vehicle interior side wall portion 24 are integrally formed at predetermined intervals on the inner side surface of the vehicle exterior side wall portion 23, and a retaining lip 28 protruding obliquely downward toward the vehicle exterior side wall portion 23 is integrally formed on the inner side surface of the vehicle interior side wall portion 24. During the installation operation of the weather strip 17, the flange 16 of the peripheral edge of the front door opening portion 14 (rear door opening portion 15) is inserted into the gap between the two side wall portions 23 and 24 of the installation portion 21, thereby the retaining lip 28 abuts against the flange 16 and elastically deforms, and the flange 16 is sandwiched between the retaining lip 28 and the plurality of convex portions 27 of the vehicle exterior side wall portion 23 by the elastic reaction force of the retaining lip 28, so that the weather strip 17 is installed on the flange 16.

[0035] A decorative lip 29 protruding toward the vehicle interior is integrally formed on the top wall portion 25 of the mounting portion 21 , and the decorative lip 29 covers a gap between the mounting portion 21 and an interior trim 30 on the vehicle interior side.

[0036] like Figure 3 As shown, the hollow sealing portion 22 abuts against the periphery of the front door 18 (rear door 19) and is compressed and deformed when the front door 18 (rear door 19) is closed, thereby sealing the periphery of the front door 18 (rear door 19) and the periphery of the front door opening 14 (rear door opening 15).

[0037] The hollow sealing portion 22 includes a head side wall portion 31 located on the side opposite to the mounting portion 21, and a curved portion 32 adjacent to both sides of the head side wall portion 31 and formed to be more easily bent than other portions of the hollow sealing portion 22. The curved portion 32 is formed to be thinner than other portions of the hollow sealing portion 22, and is thus formed to be more easily bent than other portions of the hollow sealing portion 22. Thus, the easily bendable curved portion 32 and other portions of the hollow sealing portion 22 can be easily formed by extrusion molding.

[0038] At multiple locations on the inner wall surface of the head side wall portion 31 of the hollow seal portion 22, multiple lip-shaped protrusions 33 protruding from the inner wall surface of the head side wall portion 31 into the hollow seal portion 22 are integrally formed with the same material as the hollow seal portion 22 at predetermined intervals. Each protrusion 33 is formed so that when the hollow seal portion 22 is in a state of compression deformation when the front door 18 (rear door 19) is closed, the tip of each protrusion 33 does not abut against the inner wall surface of the hollow seal portion 22, and each protrusion 33 is formed at a position where it does not abut against each other. Each protrusion 33 is formed into a lip shape extending along the length direction of the sealing strip 17 by extrusion molding.

[0039] In this case, in order to make it easier for the sound intruding into the hollow sealing part 22 from the outside of the vehicle to hit each protrusion 33, the protrusion length of each protrusion 33 is preferably set to, for example, 0.5 mm or more within a range in which the tip of each protrusion 33 does not abut against the inner wall surface of the hollow sealing part 22 when the hollow sealing part 22 is in a compressed and deformed state when the front door 18 (rear door 19) is closed. This is because the longer the protrusion length of each protrusion 33, the easier it is for the sound intruding into the hollow sealing part 22 to hit each protrusion 33.

[0040] A coating portion 34 for improving the wear resistance of the surface is formed on the surface of the hollow seal portion 22. The coating portion 34 is formed of a rubber material having a specific gravity of 1.2 to 1.5, for example, and is formed by extrusion when the weather strip 17 is formed.

[0041] The hollow seal portion 22 and the protruding portion 33 are formed of a rubber material having a specific gravity of, for example, 0.2 to 1.0, and the mounting portion 21 , the holding lip 28 , and the convex portion 27 are formed of a rubber material having a specific gravity of, for example, 0.6 to 1.5.

[0042] In the sealing strip 17 of the present embodiment 1 described above, a hollow cylindrical wall portion formed of other materials is not arranged in the hollow sealing portion 22, and the bending portion 32 of the hollow sealing portion 22 is formed to be more easily bent than other portions, thereby preventing the compression load of the hollow sealing portion 22 from increasing when the front door 18 (rear door 19) is closed and preventing the closing performance of the front door 18 (rear door 19) from deteriorating. In addition, in the hollow sealing portion 22, the protruding portion 33 protruding from the inner wall surface of the hollow sealing portion 22 is formed of the same material as the hollow sealing portion 22, so there is no need to increase the type of material for molding the sealing strip 17, and there is no need to increase the extrusion molding device used when extruding the sealing strip 17, thereby reducing the production cost.

[0043] Furthermore, the protrusion 33 protrudes from the inner wall surface of the head side wall portion 31 so as to easily collide with the sound intruding into the hollow seal portion 22 from the head side wall portion 31 of the hollow seal portion 22. Therefore, when the front door 18 (rear door 19) is closed, the sound intruding into the hollow seal portion 22 collides with the protrusion 33 in the hollow seal portion 22, thereby attenuating the energy of the sound intruding into the hollow seal portion 22 and reducing the sound intruding into the vehicle. Furthermore, the protrusion 33 in the hollow seal portion 22 is formed so that when the hollow seal portion 22 is in a compressed and deformed state when the front door 18 (rear door 19) is closed, the tip of the protrusion 33 does not abut against the inner wall surface of the hollow seal portion 22, so that the space in the hollow seal portion 22 is not blocked by the protrusion 33, and the sound intruding into the hollow seal portion 22 can be prevented from being reflected and resonated in the narrow space blocked by the protrusion 33 and amplified.

[0044] Furthermore, in the first embodiment, the protrusion 33 is formed in a lip shape extending in the hollow sealing portion 22, so that the sound entering the hollow sealing portion 22 is easy to hit the protrusion 33, and the effect of reducing the sound can be improved. In addition, since a plurality of protrusions 33 are formed at predetermined intervals on the inner wall surface of the hollow sealing portion 22, the probability of the sound entering the hollow sealing portion 22 hitting the protrusion 33 can be increased, and the effect of reducing the sound can be improved.

[0045] In addition, since the protruding portion 33 does not protrude from the bent portion 32 , it is possible to prevent the bent portion 32 from being difficult to bend.

[0046] Example 2

[0047] Next, use Figure 4 Embodiment 2 of the present invention will be described. However, substantially the same parts as those of the above-described embodiment 1 are denoted by the same reference numerals as those of the above-described embodiment 1, and description thereof will be omitted or simplified, and different parts will be mainly described by denoting different reference numerals.

[0048] In the first embodiment, the protrusion 33 protruding into the hollow seal portion 22 is formed only on the inner wall surface of the head side wall portion 31 of the hollow seal portion 22, but in the second embodiment, lip-shaped protrusions 33 and 33a are integrally formed at two locations, the inner wall surface of the head side wall portion 31 of the hollow seal portion 22 and the inner wall surface on the opposite side (the wall surface on the vehicle outer side of the vehicle outer side wall portion 23 of the mounting portion 21), so as to protrude into the hollow seal portion 22. The protrusion 33 and the protrusion 33a are formed into a lip shape extending along the length direction of the sealing strip 17 by extrusion molding.

[0049] In addition, a protrusion that protrudes into the hollow seal portion 22 may also be formed on the inner wall surface of the hollow seal portion 22 from the curved portion 32 to the inner wall surface of the vehicle outer side wall portion 23. In short, a protrusion that protrudes into the hollow seal portion 22 may also be formed on the inner wall surface of the portion of the inner wall surface of the hollow seal portion 22 other than the head side wall portion 31.

[0050] In this case, the protrusion length and formation position of each protrusion 33, 33a are set so that when the hollow sealing portion 22 is compressed and deformed when the front door 18 (rear door 19) is closed, the end of each protrusion 33, 33a does not abut the inner wall surface of the hollow sealing portion 22, and the protrusions 33, 33a do not abut each other.

[0051] In the sealing strip 17 of the above-mentioned embodiment 2, by forming multiple protrusions 33, 33a at both the inner wall surface of the head side wall portion 31 of the hollow sealing portion 22 and the inner wall surface on the side opposite to the inner wall surface (the wall surface on the outer side of the vehicle side wall portion 23 of the mounting portion 21), the energy of the sound invading the hollow sealing portion 22 can be effectively attenuated, thereby improving the effect of reducing the sound.

[0052] Example 3

[0053] Next, use Figure 5 Embodiment 3 of the present invention will be described. However, substantially the same parts as those of the above-described embodiment 1 are denoted by the same reference numerals as those of the above-described embodiment 1, and description thereof will be omitted or simplified, and different parts will be mainly described by denoting different reference numerals.

[0054] In the first embodiment, the protrusion 33 protruding into the hollow sealing portion 22 is formed in a lip shape, but in the third embodiment, a plurality of protrusions 41 with a small amount of protrusion into the hollow sealing portion 22 are integrally formed at predetermined intervals on the inner wall surface of the head side wall portion 31 of the hollow sealing portion 22 from the same material as the hollow sealing portion 22. Each protrusion 41 is formed by extrusion molding in a shape extending along the longitudinal direction of the sealing strip 17. Each protrusion 41 protrudes into the hollow sealing portion 22 with a small amount, so by making the number of the protrusions 41 larger than the number of the lip-shaped protrusions 33 of the first embodiment, the sound intruding into the hollow sealing portion 22 is easily hit by the protrusion 41, thereby obtaining the effect of reducing the sound.

[0055] Example 4

[0056] Next, use Figure 6 Embodiment 4 of the present invention will be described. However, substantially the same parts as those of the above-described embodiment 1 are denoted by the same reference numerals as those of the above-described embodiment 1, and description thereof will be omitted or simplified, and different parts will be mainly described by denoting different reference numerals.

[0057] The above-mentioned embodiments 1 to 3 are all embodiments in which sealing strips 17 are installed on the peripheries of the front door opening 14 and the rear door opening 15 of the vehicle body 11, but the present embodiment 4 is an embodiment in which a sealing strip 51 is installed on the periphery of the front door 18 (rear door 19) as an opening and closing component, and when the front door 18 (rear door 19) is closed, the periphery of the front door opening 14 (rear door opening 15) and the front door 18 (rear door 19) are sealed by the sealing strip 51.

[0058] The weather strip 51 includes a long mounting portion 52 mounted along the periphery of the front door 18 (rear door 19) and a cylindrical hollow sealing portion 53 integrally formed on the vehicle interior side of the mounting portion 52. The mounting portion 52 and the hollow sealing portion 53 extend along the longitudinal direction of the weather strip 51 by extrusion molding.

[0059] When the front door 18 (rear door 19) is closed, the hollow sealing portion 53 abuts against the periphery of the front door opening 14 (rear door opening 15) of the vehicle body 11 and is compressed and deformed, thereby sealing the periphery of the front door 18 (rear door 19) and the periphery of the front door opening 14 (rear door opening 15).

[0060] The hollow sealing portion 53 includes a head side wall portion 54 located on the opposite side to the mounting portion 52 , and a bent portion 55 adjacent to both sides of the head side wall portion 54 and formed to be more easily bent than other portions of the hollow sealing portion 53 .

[0061] A lip-shaped protrusion 56 protruding from the inner wall surface into the hollow seal portion 53 is integrally formed at one or more locations of the inner wall surface of the head side wall portion 54 of the hollow seal portion 53 from the same material as the hollow seal portion 53. The protrusion 56 is formed so that when the hollow seal portion 53 is in a state of compression deformation when the front door 18 (rear door 19) is closed, the tip of the protrusion 56 does not abut against the inner wall surface of the hollow seal portion 53. The protrusion 56 is formed into a lip shape extending along the length direction of the sealing strip 51 by extrusion molding.

[0062] In the fourth embodiment, considering that the part of the head side wall part 54 of the hollow seal part 53 where sound easily enters is the part that hits the side panel 13 when the front door 18 (rear door 19) is closed, the effect of reducing the sound entering the vehicle is improved by forming the protrusion 56 at the part of the head side wall part 54 of the hollow seal part 53 that hits the side panel 13. However, the protrusion may be formed at other parts of the head side wall part 54 of the hollow seal part 53. In addition, the protrusion may be formed at a part other than the head side wall part 54 of the hollow seal part 53.

[0063] Example 5

[0064] Next, use Figure 7Embodiment 5 of the present invention will be described. However, substantially the same parts as those of the above-described embodiment 1 are denoted by the same reference numerals as those of the above-described embodiment 1, and description thereof will be omitted or simplified, and different parts will be mainly described by denoting different reference numerals.

[0065] In the fifth embodiment, a sealing strip 62 is installed on a flange 64 provided along the periphery of a rear tailgate opening 61 of the vehicle body 11 , and when the rear tailgate 63 serving as an opening and closing component is closed, the sealing strip 62 is used to seal the periphery of the rear tailgate opening 61 and the periphery of the rear tailgate 63 .

[0066] The sealing strip 62 includes a mounting portion 65 having a U-shaped cross section, which is mounted on a flange 64 provided along the periphery of the rear tailgate opening 61, and a cylindrical hollow sealing portion 66 formed integrally with the mounting portion 65. The mounting portion 65 and the hollow sealing portion 66 are extended along the length direction of the sealing strip 62 by extrusion molding.

[0067] The mounting portion 65 is integrally formed with a vehicle outer side wall portion 67, a vehicle inner side wall portion 68, and a top wall portion 69 connecting the two side wall portions 67 and 68, and a cylindrical hollow sealing portion 66 is integrally formed on the outer surface of the top wall portion 69. A core material 70 having a substantially U-shaped cross section formed of a metal plate or a resin plate is embedded in the mounting portion 65 by composite extrusion molding across the two side wall portions 67 and 68. The flange 64 provided along the periphery of the opening portion of the rear tailgate opening portion 61 is clamped by retaining lips 71 and 72 integrally formed on the inner side surfaces of the two side wall portions 67 and 68, and the sealing strip 62 is mounted on the flange 64.

[0068] A decorative lip 73 protruding toward the vehicle interior is integrally formed on the vehicle interior side wall portion 68 of the mounting portion 65, and the decorative lip 73 is used to cover the gap between the vehicle interior side wall portion 68 of the mounting portion 65 and the interior trim 74 on the vehicle interior side. Sealing lips 75 and 76 protruding toward the rear tailgate panel 60 are integrally formed on the vehicle exterior side wall portion 67 of the mounting portion 65, and the sealing lips 75 and 76 seal the space between the vehicle exterior side wall portion 67 of the mounting portion 65 and the rear tailgate panel 60.

[0069] The hollow sealing portion 66 includes a head side wall portion 77 located on the opposite side from the mounting portion 65 , and a bent portion 78 adjacent to both sides of the head side wall portion 77 and formed to be more easily bent than other portions of the hollow sealing portion 66 .

[0070] A lip-shaped protrusion 79 protruding from the inner wall surface into the hollow seal portion 66 is integrally formed at one or more locations of the inner wall surface of the head side wall portion 77 of the hollow seal portion 66 from the same material as the hollow seal portion 66. The protrusion 79 is formed so that when the hollow seal portion 66 is in a state of compression deformation when the rear tailgate 63 is closed, the tip of the protrusion 79 does not abut against the inner wall surface of the hollow seal portion 66. The protrusion 79 is formed into a lip shape extending along the longitudinal direction of the weather strip 62 by extrusion molding.

[0071] In the fifth embodiment, considering that the part of the head side wall part 77 of the hollow seal part 66 where sound easily enters is the part that hits the rear tailgate 63 when the rear tailgate 63 is closed, the effect of reducing the sound entering the vehicle is improved by forming a protrusion 79 on the inner wall surface of the part of the head side wall part 77 of the hollow seal part 66 that hits the rear tailgate 63. However, the protrusion may be formed at other parts of the head side wall part 77 of the hollow seal part 66. In addition, the protrusion may be formed at a part other than the head side wall part 77 of the hollow seal part 66.

[0072] [Evaluation of the Noise Reduction Effect of the Weather Strips of Examples 1 to 3]

[0073] The weather strips of Examples 1 to 3 were tested to evaluate the noise reduction effect, and the results of the evaluation test are shown in FIG. Figure 8 In this evaluation test, a sealing strip without a protrusion formed in the hollow sealing portion was used as a reference, and a sealing strip in which the space in the hollow sealing portion was interrupted by the protrusion was used as a comparative example. This comparative example is equivalent to an example in which the tip of the protrusion protruding from the inner wall surface of the hollow sealing portion abuts against the inner wall surface of the hollow sealing portion. The sealing strips of the reference, Examples 1 to 3, and the comparative example have the same structure except for the protrusion.

[0074] In this evaluation test, a sample with a sealing strip is placed between a reverberation chamber and a semi-anechoic chamber, noise is generated in the reverberation chamber, and the transmitted sound (dB) is measured in the semi-anechoic chamber. At this time, the noise is generated in the generally audible range (1000kHz to 4000kHz).

[0075] The samples were in a state where the mounting portion of the weather strip was fitted into the jig, and the transmitted sound of the weather strip was measured in five patterns: reference, Examples 1 to 3, and Comparative Example. Furthermore, the transmitted sound was also measured even in a pattern where the weather strip was not fitted but only the jig.

[0076] The difference between the transmitted sound in the mode where only the jig is used and the transmitted sound in the mode where the sealing strip is embedded in the jig is taken as the insertion loss.

[0077] (Insertion loss) = (Transmitted sound when only the jig is used) - (Transmitted sound when the jig is embedded in the sealing strip)

[0078] exist Figure 8 In the evaluation shown, in each of Examples 1 to 3 and Comparative Example, the case where the insertion loss is 2 or more greater than the reference is indicated by "◎", the case where the insertion loss is 1 to 2 greater than the reference is indicated by "○", and the case where the insertion loss is less than the reference is indicated by "×".

[0079] The results of this evaluation test confirmed that the insertion losses of Examples 1 and 2 were greater than the reference by 2 or more, and the sound reduction effect was higher than the reference.

[0080] In addition, it was confirmed that the insertion loss of Example 3 was 1 to 2 times greater than the reference, and the effect of reducing the sound was higher than the reference.

[0081] On the other hand, it was confirmed that the insertion loss of the comparative example in which the space in the hollow sealing portion was divided by the protruding portion was smaller than the reference, and the effect of reducing the sound was not obtained.

[0082] In addition, the results of the noise evaluation in the general audible range (1000kHz to 4000kHz) are as follows Figure 8 As shown, even for noise in the low frequency region (500kHz to 800kHz) and the high frequency region (5000kHz to 8000kHz), the insertion loss can be made larger than the reference by forming the protrusion in the hollow sealing portion as in Examples 1 to 3.

[0083] [Other embodiments]

[0084] The present invention can also be implemented in a weather strip that seals between the peripheral edge of the opening of a luggage compartment of a vehicle body and the luggage compartment lid, which is an opening and closing member that opens and closes the luggage compartment lid, when the luggage compartment lid is closed.

[0085] In Examples 1 to 5, the bending portion is formed to be more easily bent than other portions of the hollow sealing portion, but the bending portion is not limited thereto as long as it bends when the opening and closing member is closed.

[0086] In addition, the present invention is not limited to the above-mentioned embodiments. For example, the structure of the installation portion of the sealing strip may be changed, or the shape of the hollow sealing portion may be changed, or the position and number of protrusions formed on the inner wall surface of the hollow sealing portion may be changed, so that various changes can be implemented.

[0087] Description of Reference Numerals

[0088] 11 Body

[0089] 14 Front door opening

[0090] 15 Rear door opening

[0091] 16 Flange

[0092] 17 Sealing strip

[0093] 18Front door (opening and closing parts)

[0094] 19 rear door (opening and closing parts)

[0095] 21 Installation

[0096] 22 Hollow sealing part

[0097] 23 Vehicle outer side wall

[0098] 24 Inner side wall

[0099] 25 Top wall part

[0100] 31Head side wall portion 31

[0101] 32 bending part

[0102] 33, 33a, 41 protrusion

[0103] 51 Sealing strip

[0104] 52 Installation

[0105] 53 Hollow sealing part

[0106] 54 Side wall of head

[0107] 55 Bend

[0108] 56 Protrusion

[0109] 61 Tailgate opening

[0110] 62 Sealing strip

[0111] 63 Tailgate (opening and closing parts)

[0112] 64 Flange

[0113] 65 Installation

[0114] 66 Hollow seal

[0115] 67 Vehicle outer side wall

[0116] 68 Inner side wall

[0117] 69 Top wall part

[0118] 77 Side wall of head

[0119] 78 Bend

[0120] 79 Protrusion

Claims

1. A sealing strip, characterized in that: When the opening and closing member is closed, the long sealing strip seals the periphery of the opening of the vehicle body and the opening and closing member that opens and closes the opening. The sealing strip comprises: a hollow sealing portion, the hollow sealing portion being mounted at a mounting position between the periphery of the opening portion of the vehicle body and one of the opening and closing components, and being able to be compressed and deformed by abutting against the periphery of the opening portion of the vehicle body and the other of the opening and closing components when the opening and closing components are closed; and a mounting portion, the mounting portion being used to mount the hollow sealing portion at the mounting position, The hollow sealing portion includes: a head side wall portion, the head side wall portion is located on the side opposite to the mounting portion; and a curved portion, the curved portion is adjacent to both sides of the head side wall portion and is formed to bend when the opening and closing member is closed. In the hollow sealing portion, the protrusion protruding from the inner wall surface of the head side wall portion is formed of the same material as the hollow sealing portion, The protrusion is formed so that, when the hollow sealing portion is in a compressed and deformed state when the opening and closing member is closed, the tip of the protrusion does not come into contact with the inner wall surface of the hollow sealing portion.

2. The sealing strip according to claim 1, characterized in that: The protrusion is formed in a lip shape extending within the hollow sealing portion.

3. The sealing strip according to claim 1, characterized in that: The protrusions are formed at a plurality of locations on the inner wall surface of the head side wall portion at predetermined intervals.

4. The sealing strip according to claim 3, characterized in that: The protrusion is formed at two locations on the inner wall surface of the hollow sealing portion, the inner wall surface of the head side wall portion and the inner wall surface of the portion other than the head side wall portion, and the protrusion is formed so that when the hollow sealing portion is in a compressed and deformed state when the opening and closing component is closed, the protrusions do not abut each other.

5. The sealing strip according to claim 1, characterized in that: The bent portion is formed to be thinner than other portions of the hollow sealing portion.

6. The sealing strip according to any one of claims 1 to 5, characterized in that: The weather strip is a door opening member attached to the periphery of the opening portion of the vehicle body.

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