JP2011093416A - Weatherstrip - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a weatherstrip suppressing the increase of the force required during the closing of a door, and suppressing a seal portion from being deformed when curved along the corner on the periphery of an opening of a body. <P>SOLUTION: The weatherstrip 5 includes: a trim portion 11 with a substantially U-shaped cross-section, attached along the peripheral edge of the opening of the body; the seal portion 15 protruding to the outer-cabin side from an outer-cabin side sidewall 13 of the trim portion 11, and having a hollow therein; and a bridge 25 connecting between an inner surface of a seal wall 15K of the seal portion 15 and the outer-cabin side sidewall 13, and dividing the hollow of the seal portion 15 into a first hollow 15a and a second hollow 15b. The weatherstrip 5 is integrally formed of a sponge material. The bridge 25 is curvedly formed such that a portion 25a connected with the seal wall 15K locates on the outer peripheral portion of the opening of the body than the front end portion of the seal portion 15 in the protruding direction, and projects toward the inside of the first hollow 15a. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a weather strip attached along the periphery of an opening formed in a vehicle body.

  Generally, a weather strip (opening trim) is provided on the periphery of an opening formed in a body (vehicle body) of an automobile or the like. The weather strip includes a trim portion having a substantially U-shaped cross section that is attached to a flange portion provided along the periphery of the opening, and a seal portion that extends from the trim portion and has a hollow portion therein. And in the opening part of a body, when the door provided in this opening part so that opening and closing is possible, a seal | sticker part is press-contacted to the peripheral part of a door, and a body (opening part peripheral part) and a door ( The space between the door and the periphery of the door is sealed.

  By the way, when the weather strip is curved by following the corner of the peripheral edge of the door opening on the side surface of the body, the portion of the seal portion on the opening side of the trim portion (the outer peripheral side of the body opening) opens. There is a possibility that the outer surface of the seal portion is deformed so as to be recessed by being pulled toward the inner peripheral side of the portion. In this case, in the longitudinal direction of the weather strip, the part corresponding to the corner part of the peripheral edge of the opening of the body in the longitudinal direction of the weather strip is dressed locally so that the appearance quality and the sealing performance are deteriorated. There is a fear.

  On the other hand, in the conventional weather strip, as shown in FIG. 4, the trim portion 72 and the opening side portion of the trim portion 72 in the seal wall 73 </ b> K of the seal portion 73 are formed inside the seal portion 73 (inside the hollow portion). There is a technique of providing a linear bridge portion 75 extending so as to be connected. By adopting this technique, it is possible to suppress deformation of the seal wall 73K of the seal portion 73 when the weather strip 71 is bent along the corner portion of the periphery of the opening, and to suppress deterioration in appearance quality, etc. (For example, refer to Patent Document 1).

JP 2008-254720 A

  However, when the angle of the corner portion at the peripheral edge of the opening of the body is small, when the weather strip 71 is curved following the corner portion, the bridge portion 75 is formed as shown by a two-dot chain line in FIG. There is a concern that the force of bending and supporting the seal wall 73K of the seal portion 73 may be suddenly reduced. In this case, the effect of suppressing the deformation of the seal portion 73 (the seal wall 73K) by the bridge portion 75 as described above is not sufficiently exhibited, and there is a concern that the appearance quality is deteriorated.

  In addition, for example, when the seal portion has a relatively small cross-sectional shape that does not protrude to the inner peripheral side of the door opening portion from the outer surface of the connecting portion that connects the pair of side wall portions of the trim portion. When the bridge portion is provided inside the seal portion, the seal wall of the seal portion and the bridge portion come into contact with each other relatively quickly, so that the repulsive force (door closing force) of the seal portion when closing the door is large. There is a risk of becoming too much. In this case, there is a concern that it will be difficult to close the door.

  The present invention has been made to solve the above-described problems, and its purpose is to suppress an increase in force required to close the door (increase in door closing force) while suppressing the opening for the door. It is an object of the present invention to provide a weather strip that can suppress deformation of a seal portion when it is curved by following a peripheral corner portion.

  In the following, each means suitable for solving the above-mentioned purpose will be described in terms of items. In addition, the effect etc. peculiar to the means to respond | correspond as needed are added.

Means 1. A trim having a substantially U-shaped cross section, which is attached to a flange portion formed along the periphery of the opening of the body and includes a vehicle outer side wall portion, a vehicle inner side wall portion, and a connecting portion connecting both side wall portions. And a seal portion that extends from the vehicle outer side wall portion of the trim portion to the vehicle outer side and forms a hollow portion therein, and when the door that opens and closes the opening portion is closed, In the weather strip pressed against the periphery,
A first hollow located inside the seal portion is connected to an inner surface of the seal wall of the seal portion and an outer surface of the vehicle outer side wall portion, and the hollow portion is positioned on the inner peripheral side of the opening of the body. And a bridge portion that is divided into a second hollow portion located on the outer peripheral side of the opening of the body,
At least the seal part and the bridge part are made of sponge material,
The connecting portion of the bridge portion with the inner surface of the seal wall of the seal portion is located in a portion of the seal portion on the outer peripheral side of the opening portion with respect to the projecting direction tip portion of the seal portion,
The connecting portion of the bridge portion with the vehicle outer side wall portion is located at a portion on the inner peripheral side of the opening portion than the connecting portion of the bridge portion with the seal wall in the vehicle outer side wall portion,
The weather strip, wherein the bridge portion is curved so as to protrude toward the inside of the first hollow portion.

  According to the means 1, the bridge portion that connects the inner surface of the seal wall of the seal portion and the outer surface of the outer side wall portion is provided, and the connecting portion between the seal portion of the bridge portion and the inner surface of the seal wall is a seal. It is located in the site | part of the outer peripheral side of the opening part of a body rather than the protrusion direction front-end | tip part of the said seal part among the parts. Further, the bridge portion is curved so as to be convex inside the first hollow portion. For this reason, when the weather strip is curved following the corner of the periphery of the opening of the body, the seal portion is directed toward the inner periphery of the opening with respect to the outer periphery of the opening of the body. Even when force acts, the seal portion can be supported by the bridge portion, and deformation of the seal portion can be suppressed. Furthermore, when the weather strip is curved by following the corner of the periphery of the opening of the body by the curved formation of the bridge portion (even if the angle of the corner of the periphery of the opening is small) )) The seal portion can be reliably supported by the bridge portion without bending the bridge portion. Therefore, when the weather strip is curved following the corner shape of the periphery of the opening of the body, it is possible to suppress a situation in which the seal portion is deformed so as to be recessed, and the appearance quality is improved. In addition, the sealing performance can be improved.

  Further, the bridge portion is located at a portion of the seal portion connected to the inner surface of the seal wall at a position on the outer peripheral side of the opening portion of the body with respect to the projecting direction front end portion of the seal portion, and further inside the first hollow portion. Since it is curved so as to be convex, the bridge portion can be deformed relatively smoothly following the pressing deformation of the seal wall without stretching the bridge portion when closing the door. Therefore, it is possible to avoid a situation in which it is difficult to close the door due to the provision of the bridge portion. In particular, when the seal portion has a relatively small cross-sectional shape that does not protrude to the inner peripheral side of the opening of the body from the outer surface of the connecting portion of the trim portion, a bridge portion is provided inside the seal portion. The increase in the repulsive force of the seal part due to the risk of becoming relatively large, but by configuring the bridge part as described above, it is possible to suppress an increase in the repulsive force of the seal part when closing the door it can. Accordingly, even a weather strip having a relatively small cross-sectional shape of the seal portion can be configured to suppress the deformation of the seal portion when bent and to close the door relatively smoothly.

  In addition, the contact part with the door of a seal part changes with where the said seal part is located in the periphery of the opening part of a body. In other words, in the longitudinal direction of the weather strip, the seal portion has a force in which the door abuts against a portion on the inner peripheral side of the opening of the body slightly from the front end portion in the protruding direction of the seal portion, and the force mainly toward the vehicle interior from the door. There is a part to be received, and there is also a part that receives a force from the door toward the inner side of the vehicle and the outer peripheral side of the opening from the door. For this reason, for example, when the bridge portion is formed in a substantially linear shape so as to connect the outer peripheral side portion of the opening and the inner peripheral side portion of the opening, the weather strip is formed by the bridge portion. Although it is possible to suppress deformation of the seal part when bending the door, the part of the seal wall of the seal part that receives force from the door to the inside of the vehicle and the outer periphery of the opening when the door is closed There is a possibility that a larger force may be required to deform the seal portion when closing. On the other hand, according to this means, the bridge portion connects the portion of the seal portion on the outer peripheral side of the opening of the body and the outer side wall portion of the trim portion, and is curved. Accordingly, it is possible to prevent a fear that a larger force is required to deform the seal portion when the door is closed. As a result, the door can be closed relatively smoothly.

  In addition, by providing the bridge portion as described above, even when the seal portion is formed of a sponge material, deformation of the seal portion when the weather strip is curved can be suppressed. Therefore, it is possible to improve the sealing property and reduce the weight while preventing the appearance quality from being deteriorated at the corner of the weather strip.

  “The connecting portion of the bridge portion with the seal wall is provided at a position where the circumference of the portion constituting the second hollow portion of the seal portion is ¼ to ３ of the circumference of the entire seal portion. It may be "being done". In this case, the effect of the means 1 such as avoiding an increase in the force required for closing the door while suppressing the deformation of the seal portion when bent is more reliably achieved.

Mean 2. The radius of curvature inside the bridge portion is configured to be 5 mm or more and 10 mm or less,
2. The weather strip according to claim 1, wherein the thickness of the bridge portion is configured to be 1.25 times or more and 2 times or less of the minimum thickness portion of the seal portion.

  According to the means 2, by setting the curvature radius inside the bridge portion to 5 mm or more, the cross-sectional shape of the bridge portion tends to be deformed to the inner peripheral side of the opening of the body when the weather strip is bent. It can be made the shape which is easy to support the seal wall of the seal part. Moreover, it can be set as the shape where the intermediate part of a bridge | bridging part cannot contact | abut with a seal wall at the time of door closing.

  Furthermore, by setting the curvature radius inside the bridge portion to 10 mm or less, it is possible to more reliably prevent the bridge portion from being bent when the weather strip is bent.

  Further, by setting the thickness of the bridge portion to be 1.25 times or more and 2 times or less of the minimum thickness portion of the seal portion, the depression of the seal wall of the seal portion when the weather strip is bent is suppressed. Thus, it is possible to more reliably exhibit the effects. In addition, when the thickness of the bridge portion is larger than twice the minimum thickness portion of the seal portion, the reaction force of the seal portion when the door is closed becomes too high due to the provision of the bridge portion. May occur.

  Means 3. A portion of the bridge portion in the vicinity of the connection portion between the seal portion and the inner side surface of the seal wall faces the inside of the first hollow portion from the inner side surface of the seal wall substantially parallel to the outer side wall portion. The weatherstrip according to claim 1 or 2, characterized in that it extends.

  According to the means 3, when the weather strip is curved following the corner of the periphery of the opening of the body, the seal wall of the seal portion which is to be deformed to the inner peripheral side of the opening is supported by the bridge portion. It becomes easy. Therefore, the effect of suppressing the deformation of the seal portion when the weather strip is bent is more reliably achieved.

It is a perspective view of a car with a front door in an open state. It is sectional drawing which shows the weather strip of this invention. It is sectional drawing which shows the attachment state in the corner part of the opening part periphery of the body of the weather strip of this invention. It is sectional drawing which shows the conventional weather strip.

  Hereinafter, an embodiment will be described with reference to the drawings. As shown in FIG. 1, an automobile 1 as a vehicle is provided with a door as an opening / closing member (a front door in the figure: hereinafter simply referred to as “door 2”) that can be opened and closed, and a body corresponding to the door 2. A weather strip 5 is provided at the periphery of the opening 4 for the door 3 (vehicle body). In addition, although illustration is abbreviate | omitted, while the weather strip 5 is shape | molded by the extrusion molding method, both terminal parts are connected by the shaping | molding, and it has comprised cyclic | annular form as a whole.

  As shown in FIG. 2, the weather strip 5 includes a vehicle inner side wall portion 12, a vehicle outer side wall portion 13, and a connecting portion 14 that connects both side wall portions 12 and 13, and has a substantially U-shaped cross section. A trim portion 11 is provided, and a seal portion 15 is provided so as to protrude from the vehicle outer side wall portion 13 to the vehicle outer side and has a hollow portion therein.

  The trim part 11 is made of sponge EPDM (ethylene-propylene-diene copolymer rubber) having a specific gravity of 0.4 to 0.8. In this embodiment, the specific gravity is 0.45. A metal insert 17 is embedded in the trim portion 11.

  In addition, the trim portion 11 includes a vehicle inner side holding lip 21 extending from the inner side surface of the vehicle inner side wall portion 12 toward the vehicle outer side, and a vehicle outer side holding lip 22 extending from the inner side surface of the vehicle outer side wall side portion 13 toward the vehicle inner side. And are provided. Further, the trim portion 11 is provided with a cover lip 23 that extends from the outer surface of the coupling portion 14 toward the vehicle inner side and covers an end portion of an interior product such as a garnish (not shown). The holding lips 21 and 22 and the cover lip 23 are made of sponge EPDM having the same specific gravity as the trim portion 11 and 0.45.

  A flange portion 33 is formed on the periphery of the opening 4 by joining an inner panel 31 and an outer panel 32 that constitute the body 3. The weather strip 5 is attached to the periphery of the opening 4 of the body 3 by relatively fitting the flange portion 33 inside the trim portion 11. Further, when the door 2 is closed, the seal portion 15 is deformed by being pressed against the peripheral portion of the door 2, thereby sealing between the door 2 and the body 3.

  The seal portion 15 is made of sponge EPDM having the same specific gravity of 0.45 as that of the trim portion 11 and is formed integrally with the trim portion 11. Further, the seal portion 15 protrudes from the vicinity of the boundary portion of the vehicle outer side wall portion 12 to the connecting portion 13 to the front end portion of the vehicle outer side wall portion 12 (the outer peripheral side end portion of the opening 4). The seal wall 15K is curvedly formed and has a substantially D-shaped cross section as a whole. Note that the seal portion 15 according to the present embodiment is located at substantially the same position as the connecting portion 14 of the trim portion 11 or slightly on the outer peripheral side of the opening portion 4 in the outer peripheral direction of the opening portion 4 of the body 3.

  Now, inside the seal portion 15, a bridge portion 25 is provided that extends from the outer surface of the vehicle outer side wall portion 13 to the inner surface of the seal wall 15 </ b> K of the seal portion 15. The hollow portion formed inside the portion 15 is divided into a first hollow portion 15 a located on the inner peripheral side of the opening 4 and a second hollow portion 15 b located on the outer peripheral side of the opening 4. The bridge portion 25 is made of sponge EPDM having the same specific gravity of 0.45 as that of the seal portion 15 and is formed integrally with the seal portion 15 (at the same time as the trim portion 11 and the seal portion 15 during extrusion molding).

  Further, the connecting portion of the bridge portion 25 with the seal wall 15K (hereinafter referred to as the first connecting portion 25a) is the front end portion of the seal wall 15 in the protruding direction of the seal wall 15K. Is located on the outer peripheral side (upper side in FIG. 2) of the opening 4 than the part to be opened). More specifically, the first connecting portion 25a is positioned such that the peripheral length of the portion constituting the second hollow portion 15b of the seal wall 15K is ¼ to ３ of the peripheral length of the entire seal wall 15K. Is provided.

  On the other hand, the connecting part (hereinafter referred to as the second connecting part 25b) of the bridge part 25 with the vehicle outer side wall part 13 is the inner peripheral side of the opening part 4 of the vehicle outer side wall part 13 with respect to the first connecting part 25a. It is located in the part of. In other words, the second connecting portion 25b is located at a substantially intermediate portion in the extending direction from the connecting portion 14 of the vehicle outer side wall portion 13 (a portion slightly closer to the connecting portion 14 than the intermediate portion).

  Furthermore, the bridge portion 25 is curved so as to protrude toward the inside of the first hollow portion 15a. The curvature radius on the inner side (the second hollow portion 15b side) of the bridge portion 25 is configured to be 5 mm or more and 10 mm or less, and is set to 5 mm in this embodiment. Further, a portion of the bridge portion 25 on the outer peripheral side of the opening 4 connected to the seal wall 15K (a portion near the first connecting portion 25a) extends from the inner side surface of the seal wall 15K to the outer side wall portion 13 (flange portion 33). Extending substantially in parallel to the inside of the first hollow portion 15a. The thickness of the bridge portion 25 is configured to be 1.25 times or more and 2 times or less of the minimum thickness portion of the seal portion 15 (seal wall 15K). In the present embodiment, the thickness of the bridge portion 25 is set to 1.25 times the minimum thickness portion of the seal wall 15K.

  By configuring the weather strip 5 as described above, the outer periphery of the opening 4 of the seal portion 15 when the weather strip 5 is curved following the corner of the periphery of the opening 4 of the body 3. Even if a force toward the inner peripheral side of the opening 4 is applied to the side portion (the portion constituting the second hollow portion 15b), the seal portion 15 is supported by the bridge portion 25, so that the weather strip 5 The deformation of the seal portion 15 due to the bending is suppressed (see FIG. 3).

  In the present embodiment, when the door 2 is closed, the seal wall 15K in the portion of the seal portion 15 where the first hollow portion 15a is formed is in contact with the peripheral portion of the door 2, and the seal wall 15K. Of these, the portion forming the second hollow portion 15b and the portion corresponding to the first connecting portion 25a basically do not come into contact with the door 2 (instead of being directly pushed by the door 2 and deformed, the portion of the seal wall 15K Among them, the first hollow portion 15a is deformed so as to be pulled by a portion that forms the first hollow portion 15a).

  As described above in detail, according to the present embodiment, the bridge portion 25 that connects the inner surface of the seal wall 15K of the seal portion 15 and the outer surface of the vehicle outer side wall portion 13 is provided, and the seal wall of the bridge portion 25 is provided. The connecting portion (first connecting portion 25a) with the inner surface of 15K is located in a portion of the seal wall 15K on the outer peripheral side of the opening 4 with respect to the front end portion in the protruding direction of the seal wall 15K. Further, the bridge portion 25 is curved so as to be convex inside the first hollow portion 15a. For this reason, when the weather strip 5 is curved following the corner of the periphery of the opening 4 of the body 3, the opening is formed with respect to the outer peripheral portion of the opening 4 in the seal wall 15 </ b> K of the seal 15. Even when a force toward the inner peripheral side of 4 acts, the seal wall 15K is supported by the bridge portion 25, and deformation of the seal wall 15K can be suppressed. Further, when the weather strip 5 is curved by following the corner of the periphery of the opening 4 of the body 3 because the bridge 25 is curved, the angle of the corner of the opening 4 is small. Even if the bridge portion 25 is not bent, the seal wall 15K can be reliably supported by the bridge portion 25, and the appearance quality and the sealing performance can be improved.

  In particular, in the present embodiment, the portion of the bridge portion 25 on the first connecting portion 25a side is substantially parallel to the vehicle outer side wall portion 13 (flange portion 33) from the inner side surface of the seal wall 15K to the inside of the first hollow portion 15a. Therefore, when the weather strip 5 is curved, it is easy to support the seal wall 15K to be deformed to the inner peripheral side of the opening 4 with the bridge portion 25, and the seal wall 15K The effect of suppressing deformation is more reliably achieved.

  In addition, the bridge portion 25 has a connecting portion (first connecting portion 25a) with the inner surface of the seal wall 15K located at a position on the outer peripheral side of the opening 4 with respect to the protruding end portion of the seal wall 15K. 1 Since the curved portion is formed so as to be convex inside the hollow portion 15a, the bridge portion 25 is relatively smooth without being stretched when the door 2 is closed (relative to the closing direction of the door 2). To follow and deform slightly). Therefore, due to the provision of the bridge portion 25, it is possible to avoid a situation in which the seal portion 15 becomes difficult to follow and deform when the door 2 is closed, and the door 2 becomes difficult to close. In particular, in the present embodiment, the seal portion 15 has a relatively small cross-sectional shape that does not protrude to the inner peripheral side of the opening 4 from the outer surface of the connecting portion 14 of the trim portion 11. Although the increase in the repulsive force of the seal portion 15 due to the provision of the bridge portion 25 may be relatively large, the bridge portion 25 is configured as described above, whereby the seal portion 15 when the door 2 is closed. An increase in the repulsive force can be suppressed.

  Furthermore, in this embodiment, the connection part (1st connection part 25a) with the inner surface of the seal wall 15K of the seal part 15 of the bridge part 25 is the circumference | surroundings of the site | part which comprises the 2nd hollow part 15b among the seal walls 15K. The length is provided at a position such that it is ¼ to ３ of the entire circumference of the seal wall 15K. For this reason, when the weather strip 5 is curved due to the first connecting portion 25a being too close to the connecting portion of the seal portion 15 to the vehicle outer side wall portion 13, the opening 4 of the seal portion 15 is formed. It is possible to prevent a situation in which the outer peripheral side portion cannot be well supported by the bridge portion 25 and the seal portion 15 is easily deformed. Furthermore, because the first connecting portion 25a is too close to the front end of the seal wall 15K in the protruding direction, the bridge portion 25 is stretched when the door 2 is closed, making it difficult to close the door 2. The situation can be prevented.

  Note that the contact portion of the seal wall 15K with the door 2 differs depending on where the seal wall 15K is located on the periphery of the opening 4 of the body 3. That is, in the longitudinal direction of the weather strip 5, the seal wall 15 </ b> K abuts the door 2 slightly on the inner peripheral side of the opening 4 with respect to the protruding end of the seal wall 15 </ b> K. There is also a part that receives a force toward the door, and a part where the door 2 comes into contact with a part on the inner peripheral side of the opening 4 further than the part and receives a force from the door 2 toward the inner side of the vehicle and the outer peripheral side of the opening 4. is there. Therefore, for example, when the bridge portion 25 is formed in a substantially straight line so as to connect the outer peripheral portion of the opening 4 and the inner peripheral portion of the opening 4 in the seal wall 15K, the bridge portion 25, the deformation of the seal portion 15 (seal wall 15K) when the weather strip 5 is bent can be suppressed. However, among the seal portions 15, when the door 2 is closed, the door 2 and the opening 4 With respect to a portion that receives a force on the outer peripheral side, a larger force may be required to deform the seal portion 15 when the door 2 is closed. On the other hand, according to the present embodiment, the bridge portion 25 connects the portion of the seal wall 15K on the outer peripheral side of the opening 4 and the outer side wall portion 13 of the trim portion 11, and is curved. Yes. Accordingly, even in a portion of the seal wall 15K that receives a force from the door 2 to the inside of the vehicle and the outer peripheral side of the opening 4 when the door 2 is closed, the seal wall 15K should be deformed when the door 2 is closed. It is possible to prevent a fear that a large force is required. As a result, the door 2 can be closed relatively smoothly.

  In addition, by providing the bridge portion 25 as described above, even if the seal portion 15 is formed of sponge EPDM, deformation of the seal portion 15 (seal wall 15K) when the weather strip 5 is curved is suppressed. be able to. Accordingly, it is possible to improve the sealing performance and reduce the weight while preventing the deterioration of the appearance quality at the corner portion. Moreover, since the bridge part 25 is comprised by sponge EPDM, the situation where the bridge part 25 stretches at the time of closing of the door 2 can be suppressed more. In particular, in the present embodiment, since the entire weather strip 5 (extruded portion thereof) is made of sponge EPDM, the production efficiency can be improved.

  Moreover, in this embodiment, the curvature radius inside the bridge | bridging part 25 is comprised by 5 mm. Thus, by setting the curvature radius inside the bridge portion 25 to 5 mm, the cross-sectional shape of the bridge portion 25 tends to be deformed to the inner peripheral side of the opening 4 when the weather strip 5 is curved. The seal portion 15 (seal wall 15K) can be shaped to be easily supported. Further, when the door 2 is closed, the intermediate portion of the bridge portion 25 can be shaped so as not to contact the seal wall 15K.

  In the present embodiment, the thickness of the bridge portion 25 is configured to be 1.25 times the minimum thickness portion of the seal portion 15 (the seal wall 15K). In addition, the deformation of the seal portion 15 when the weather strip 5 is curved is suppressed by setting the thickness of the bridge portion 25 to 1.25 times or more the minimum thickness portion of the seal portion 15 (seal wall 15K). It is possible to more reliably exhibit the effect of performing. Further, by setting the thickness of the bridge portion 25 to be twice or less the minimum thickness portion of the seal portion 15, the reaction force of the seal portion 15 becomes too high by providing the bridge portion 25, and the door 2 It is possible to prevent a situation where a greater force is required when closing.

  In addition, it is not limited to the description content of the said embodiment, For example, you may implement as follows. Of course, other application examples and modification examples not illustrated below are also possible.

  (A) In the said embodiment, although the curvature radius inside the bridge part 25 was 5 mm, the curvature radius should just be 5 mm or more and 10 mm or less. When the radius of curvature inside the bridge portion 25 is less than 5 mm, the cross-sectional shape of the bridge portion 25 supports the seal portion 15 that tends to be deformed toward the inner peripheral side of the opening 4 when the weather strip 5 is curved. There is a possibility that the shape becomes difficult. In addition, there is a concern that the intermediate portion of the bridge portion 25 may come into contact with the seal portion 15 (the inner surface of the seal wall 15K) when the door 2 is closed.

  On the other hand, when the radius of curvature inside the bridge portion 25 exceeds 10 mm, the bridge portion 25 is easily bent when the weather strip 5 is bent, or both ends of the bridge portion 25 are closed by the door 2. In some cases, the bridge portion 25 deforms relatively smoothly without stretching, and when the weather strip 5 is bent, the seal portion 15 may be set to an expected position that can be reliably supported. You might not be able to do it.

  (B) In the above embodiment, a solid EPDM film or the like may be formed on the surface layer side of the seal portion 15. In this case, improvement in wear resistance, improvement in appearance quality, and the like can be achieved. Even when a coating film or the like is formed on the surface layer side of the seal portion 15, since the coating film is thinner (than the thickness of the seal portion 15), the sealing performance is improved by configuring the seal portion 15 with sponge EPDM. The effect of is sufficiently exhibited.

  (C) In the above embodiment, the weather strip 5 provided on the periphery of the door opening 4 of the body 3 corresponding to the front door 2 is embodied, but the rear door, back door, luggage door (trunk lid) It is also possible to apply to weather strips mounted on other opening portions such as roof doors (sliding roof panels), sliding doors, etc., or flange portions on the peripheral edges of the doors as opening and closing members for opening and closing the opening portions.

  Moreover, in the said embodiment, although the weather strip 5 is comprised cyclically | annularly by connecting both the terminal parts of an extrusion molding part by mold forming, the wafer which does not connect both the terminal parts of an extrusion molding part. It is also possible to apply to the strip. Furthermore, it is also possible to apply to a weather strip constituted by connecting a plurality of extrusion-molded parts by means of a molding part.

  (D) In the above embodiment, the trim part 11, the seal part 15 and the bridge part 25 are all made of sponge EPDM having a specific gravity of 0.45, but the material of the weather strip 5 is particularly limited. In addition, the specific gravity may be 0.4 to 0.8 sponge material. For example, the seal portion 15 and the bridge portion 25 may be made of a thermoplastic elastomer sponge material.

  DESCRIPTION OF SYMBOLS 1 ... Automobile, 2 ... Door, 3 ... Body, 4 ... Opening part, 5 ... Weather strip, 11 ... Trim part, 12 ... Car inner side wall part, 13 ... Car outer side wall part, 14 ... Connection part, 15 ... Seal 15a ... first hollow part, 15b ... second hollow part, 15K ... seal wall, 25 ... bridge part, 25a ... first connecting part, 25b ... second connecting part, 33 ... flange part.

Claims (3)

A trim having a substantially U-shaped cross section, which is attached to a flange portion formed along the periphery of the opening of the body and includes a vehicle outer side wall portion, a vehicle inner side wall portion, and a connecting portion connecting both side wall portions. And a seal portion that extends from the vehicle outer side wall portion of the trim portion to the vehicle outer side and forms a hollow portion therein, and when the door that opens and closes the opening portion is closed, In the weather strip pressed against the periphery,
A first hollow located inside the seal portion is connected to an inner surface of the seal wall of the seal portion and an outer surface of the vehicle outer side wall portion, and the hollow portion is positioned on the inner peripheral side of the opening of the body. And a bridge portion that is divided into a second hollow portion located on the outer peripheral side of the opening of the body,
At least the seal part and the bridge part are made of sponge material,
The connecting portion of the bridge portion with the inner surface of the seal wall of the seal portion is located in a portion of the seal portion on the outer peripheral side of the opening portion with respect to the projecting direction tip portion of the seal portion,
The connecting portion of the bridge portion with the vehicle outer side wall portion is located at a portion on the inner peripheral side of the opening portion than the connecting portion of the bridge portion with the seal wall in the vehicle outer side wall portion,
The weather strip, wherein the bridge portion is curved so as to protrude toward the inside of the first hollow portion. The radius of curvature inside the bridge portion is configured to be 5 mm or more and 10 mm or less,
2. The weather strip according to claim 1, wherein a thickness of the bridge portion is configured to be 1.25 times or more and 2 times or less of a minimum thickness portion of the seal portion.   A portion of the bridge portion in the vicinity of the connection portion between the seal portion and the inner side surface of the seal wall faces the inside of the first hollow portion from the inner side surface of the seal wall substantially parallel to the outer side wall portion. The weather strip according to claim 1, wherein the weather strip extends.

Images