JP6620876B2 - Vehicle weatherstrip - Google Patents

Description

  The present invention relates to a weather strip for a vehicle that seals the periphery of an opening / closing member that opens and closes an opening of the vehicle.

For automobiles (vehicles) that have a back door at the rear of the vehicle body, use an upper and lower split-type back door, specifically an upper opening type upper door and a lower opening type lower door. There are some which open the upper region and the lower region, that is, the whole bag door opening.
Many of these upper doors and lower doors employ a structure in which a flange portion is formed at the upper end portion of the lower door, and an overlapping portion that overlaps the outer surface of the flange portion is formed at the lower end portion of the upper door.

By the way, for the seal between the upper door and the lower door, a rubber weather strip is provided along the vehicle width direction on the weather strip mounting surface formed in the overlapped portion, and the tip of the weather strip contacts the flange portion. A contact structure is used.
As with the other doors, the back door seal is required to have a sealing property between the tip of the weather strip and the flange, or between the base of the weather strip and the weather strip mounting surface.

  For this reason, the weather strip not only has a hollow seal portion protruding from a base portion fixed to the weather strip mounting surface, but also an inner lip portion provided on the inner side of the base portion and an outer side provided on the outer side of the base portion. It has a lip. As a result, when the upper door is closed, not only the front end of the hollow seal portion and the flange portion abut, but also the inner lip portion and the inside of the weather strip mounting surface abut, and the outer lip portion and the weather strip mounting The tip of the hollow seal portion is pressed against the flange portion and the inner lip portion and the outer lip portion are pressed against the weather strip mounting surface by the reaction force applied to the hollow seal portion when the outer side of the surface comes into contact with and closes. . That is, the distal end portion of the hollow seal portion and the flange portion are brought into close contact with each other and sealed. Further, the inner lip portion and the outer lip portion are brought into close contact with the weather strip mounting surface to seal the gap with the base portion, and sealing is performed on both the front end side and the base side of the weather strip.

By the way, the sealing force on the base side of the weatherstrip is ensured by a balance of reaction forces transmitted from the hollow seal portion to the inner lip portion and the outer lip portion, respectively. Specifically, in the weather strip, when the hollow seal portion is compressed (collapsed), the reaction force accompanying the compression is equally applied to the inner and outer lip portions of the base portion through the wall portions on both sides.
However, the balance of reaction forces transmitted to the inner lip portion and the outer lip portion is likely to change due to variations in the direction of approach of the weather strip toward the vehicle body. Factors for this variation include variations in the weather strip mounting orientation, variations in cross-sectional shape, and variations in the weather strip mounting surface. The sealing force of the inner lip portion and the outer lip portion tends to become unstable due to such variations.

  The weather strip has a structure in which a partition wall is provided inside the hollow seal portion in order to enhance sound insulation and rigidity as in Patent Documents 1 and 2, and the sealing force of such first lip portion and second lip portion. The structure which avoids the variation of is not seen.

JP-A-8-132976 Japanese Patent Laid-Open No. 2003-11740

For this reason, the sealing force applied between the inner and outer lip portions of the base and the weather strip mounting surface is unstable, and when the vehicle body receives rainwater or car wash water and the weatherstrip vehicle exterior gets wet. As water dives between the weather strip and the weather strip mounting surface, it becomes so-called diving water and may enter the inside of the vehicle.
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a weather strip for a vehicle that can secure a sufficient sealing force between the weather strip and the weather strip mounting surface regardless of variations in the weather strip entry direction.

  An aspect of the present invention is a weather strip that seals a peripheral edge of an opening / closing member that opens and closes an opening of a vehicle body, and a base that is fixed to the weather strip mounting surface, and projects from the base to the opposite side of the weather strip mounting surface A hollow seal portion having a hollow cross section whose front end portion is elastically contacted with the receiving seat, and the base portion includes a first lip portion that comes into contact with the weather strip mounting surface, and a first lip portion. A second lip portion that is in contact with the weather strip mounting surface on the outer side of the vehicle, and the hollow seal portion is an inner surface in the vicinity of the second lip portion on the base side from the inner surface in the vicinity of the distal end portion in the hollow seal portion. A partition that transmits the reaction force received at the tip to the second lip, and the partition extends from the inner surface near the tip of the hollow seal to the center of the hollow seal. First wall and hollow seal The second wall portion extends from the inner surface of the base portion near the second lip portion to the center side of the hollow seal portion and is connected to the first wall portion, and the second wall portion is thicker than the first wall portion. Was formed thinly.

  According to the present invention, when the hollow seal portion of the weather strip is deformed (collapsed), the partition wall in the hollow seal portion transmits the reaction force acting on the distal end portion of the hollow seal portion to the outer lip portion of the base portion. As a result, even if the weather strip approach direction varies for some reason and the reaction force transmitted to the base side is biased toward the inside of the vehicle, the reaction force is transmitted to the outer lip portion through the partition wall. Therefore, the outer lip portion can be reliably pressed against the weather strip mounting surface to supplement the sealing force.

  Therefore, the outer lip portion of the base portion can secure a sufficient sealing force between the weather strip and the weather strip mounting surface regardless of variations in the weather strip entry direction. Thereby, water does not dive between the lip portion and the weather strip mounting surface from the outside of the vehicle and does not enter the vehicle.

  Moreover, the partition wall has a wall structure that can be bent and deformed by combining a first wall portion extending from the inner surface near the tip of the hollow seal portion and a second wall portion extending from the inner surface near the second lip portion. The structure is simple, especially the second wall is thinner than the first wall and more easily deformed than the first wall. Even if the load increases, the second wall portion is deformed, and it is possible to cope with slight variations.

The perspective view which shows the vehicle which has a back door in the rear part of the 1st Embodiment of this invention. The perspective view which shows when the back door is closed. Sectional drawing of the weather strip of the back door which follows the AA line in FIG. Sectional drawing of the weather strip of the back door which follows the BB line in FIG. Sectional drawing of the weather strip of the back door used as the principal part of the 2nd Embodiment of this invention. Sectional drawing of the weather strip when the back door is closed.

Hereinafter, the present invention will be described based on a first embodiment shown in FIGS.
1 and 2 show a rear part of a vehicle, for example, a rear part of a wagon car, in which 1 is a vehicle body, 3 is a back door opening provided at a rear end of the vehicle body 1, and 5 is a back door opening. 3 shows an opening weather strip provided at the opening edge of 3.
A back door 7 opens and closes the back door opening 3. The back door 7 has, for example, a vertically divided structure. That is, the back door 7 is composed of a combination of an upper door 9a that rotates with the upper end side as a fulcrum and a lower door 9b that rotates with the lower end side as a fulcrum, and the upper door 9a is above the back door opening 3. The area is opened and closed, and the lower area of the back door opening 3 is opened and closed by the lower door 9b.

  Specifically, the upper door 9a has weather strip receiving seats (not shown) on three sides of the upper part and both side parts (vehicle width direction), and the lower door 9b has three parts of the lower part and both side parts (vehicle width direction). A weather strip seat (not shown) is provided on the side. And the upper end side of the upper door 9a is rotatably supported by the upper part of the rear end of the vehicle body 1 via a hinge (not shown), and the lower end side of the lower door 9b is via a hinge (not shown). The lower end of the vehicle body 1 is rotatably supported. Incidentally, reference numeral 12 denotes a gas cylinder that supports the upper door 9a (FIG. 1).

  As a result, the entire back door opening 3 is closed by closing the upper door 9a after closing the lower door 9b. When the lower door 9b is closed, the leading end of the opening weather strip 5 and each weather strip receiving seat of the lower door 9b come into contact with each other, and the gap between the back door opening 3 and the lower door 9b is sealed. . When the upper door 9a is closed, the front end portion of the opening weather strip 5 and the weather strip receiving seat of the upper door 9a come into contact with each other, and the gap between the back door opening 3 and the upper door 9a is sealed.

A center weather strip 17 is provided between the upper door 9a and the lower door 9b in order to seal the gap between the doors.
As shown in FIG. 4, a flange portion 13 protruding upward is formed at the upper end portion of the lower door 9 b in the vehicle width direction. On the other hand, at the lower end portion of the upper door 9a, as shown in FIG. 4, an overlapping portion 15 that can overlap with the entire flange portion 13 is formed.

A mounting surface 16 corresponding to the weather strip mounting surface of the present application is formed at a predetermined position on the inner surface of the overlapping portion 15, that is, the surface facing the flange portion 13, in the vehicle width direction. A weather strip 17 is attached.
On the other hand, a receiving seat 14 with which the center weather strip 17 abuts is formed on the surface (outer surface) of the flange portion 13 facing the overlapping portion 15. For example, as shown in FIG. 1, the center weather strip 17 includes a long rubber weather strip 19 (corresponding to the weather strip of the present application) that is attached to the center of the mounting surface 16 in the vehicle width direction, and both ends of the weather strip 19. And a rubber side seal portion 21 attached to the portion. Thus, when the upper door 9a is closed, the weather strip 19 and the side seal portion 21 are sandwiched between the flange portion 13 and the overlapping portion 15, and the upper door 9a (the overlapping portion 15) and the lower door 9b (the flange portion). 13) The space is sealed.

  As shown in FIGS. 3 and 4, the weather strip 19 includes a base portion 25 (corresponding to a base portion of the present application) fixed to the mounting surface 16 with a clip or the like (not shown), and the base portion 25 on the opposite side of the mounting surface 16. A hollow seal portion 23 having a protruding hollow cross section, an inner lip portion 27 (corresponding to the first lip portion of the present application) formed along the inner edge (one side in the width direction) of the base portion 25, and an inner lip It has an outer lip portion 29 (corresponding to the second lip portion of the present application) formed along the vehicle outer end edge (the other side in the width direction) of the base portion 25 which is the vehicle outer side from the portion 27. Incidentally, a distal end lip portion 23 a is formed at the distal end portion of the hollow seal portion 23.

  That is, when the upper door 9a is closed, the hollow seal portion 23 comes into contact with the receiving seat 14 of the flange portion 13 and is elastically deformed (collapsed), and the tip (tip lip portion 23a) is pressed against the receiving seat 14. . In addition, the inner and outer lip portions 27 and 29 are pressed against the inner and outer surface portions of the mounting surface 16 by the reaction force from the hollow seal portion 23 (reaction force received at the tip). It is done. Thereby, sealing is performed on both the front end side of the weatherstrip 19 and the base portion 25 side, and the space between the upper door 9a and the lower door 9b (inside and outside the vehicle) is sealed.

The weather strip 19 that seals between the upper and lower doors 9a, 9b employs a structure that improves the instability of the sealing force caused by variations in the entry direction a of the weather strip 19 (FIG. 4).
For this purpose, in order to stably transmit the reaction force received at the tip of the hollow seal portion 23 to the outer lip portion 29 (vehicle outer side), the inside of the hollow seal portion 23 from the inner surface near the tip portion to the vicinity of the outer lip portion 29. A structure in which a partition wall 31 extending on the inner surface is formed is used. For example, as shown in FIGS. 3 and 4, a structure in which a pantograph-shaped partition wall 31 is provided in the hollow portion 23 b of the hollow seal portion 23 is used.

  Specifically, the partition wall 31 is a wall that partitions the hollow portion 23b (internal space) from the radial direction, and is hollow from the inner surface in the vicinity of the distal end lip portion 23a formed at the distal end portion of the hollow seal portion 23 of the hollow seal portion 23. A hollow portion from the wall portion 33 (corresponding to the first wall portion of the present application) extending to the center side of the portion 23b, and the inner surface of the hollow seal portion 23 in the vicinity of the outer lip portion 29 (the inner surface on the base portion 25 side). It is formed with a wall structure having a base-side wall portion 35 (corresponding to the second wall portion of the present application) extending to the center side of 23b and connected to the wall portion 33. The wall portions 33 and 35 are formed integrally with the hollow seal portion 23 and both have elasticity. The connecting portion 37 that connects the wall portions 33 and 35 has a bent shape (here, L shape) and is a portion that is less rigid than the other wall portions 33 and 35. That is, the partition wall 31 has a structure in which the wall portions 33 and 35 are bent and deformed with the connection portion 37 as a fulcrum as the hollow seal portion 23 is compressed (pantograph structure).

  Thereby, when the upper door 9a is closed and the hollow seal portion 23 comes into contact with the receiving seat 14 of the flange portion 13 and is compressed and deformed (collapsed), the partition wall 31 is deformed while being bent from the connection portion 37, The reaction force received at the tip of the hollow seal portion 23 is transmitted to the outer lip portion 29 (vehicle outer side) of the base portion 25. Normally (without a partition wall), when the entry direction a of the weather strip 19 varies, the hollow seal portion 23 is deformed by being inclined to either the vehicle inner side or the vehicle outer side. Transmission is biased to either the vehicle outer side or the vehicle inner side of the portion 25. For this reason, a reaction force may be exerted in the direction of escaping from the outer lip portion 29 (the vehicle inner side). May penetrate and ooze out inside the car. However, in the present embodiment, since the partition wall 31 is provided, the reaction force to escape is always transmitted to the outer lip portion 29 (the vehicle outer side) through the wall portions 33 and 35. In particular, in the pantograph-shaped partition wall 31, the thickness of the wall 35 is set to be thinner than that of the wall 33 so that the wall 35 is more easily deformed than the wall 33. Thus, even when a small compressive load is increased, the reaction force is reliably transmitted to the outer lip portion 29 through the partition wall 31. Incidentally, when the upper door 9a is closed, the wall 33 is slightly bent and the wall 35 is bent to the maximum. The partition wall 31 may have another structure as long as the wall portion 35 is more easily deformed than the wall portion 33.

By this partition wall 31, the reaction force of the hollow seal portion 23 is stably transmitted to the outer lip portion 29 (the vehicle outer side) regardless of variations in the entry direction a of the weather strip 19.
That is, the same operation will be described. The upper door 9a that has been waiting on the upper side of the vehicle body 1 (FIG. 3) is closed, and the tip of the weather strip 19 of the upper door 9a (the tip lip portion 23a) as shown in FIG. ) Contact the seat 14 of the flange portion 13 of the lower door 9b.

  Then, the tip lip portion 23 a is deformed, the hollow seal portion 23 is crushed and deformed, and a reaction force accompanying compression is applied to the inner lip portion 27 and the outer lip portion 29 through both side portions of the hollow seal portion 23, respectively. At the same time, the partition wall 31 starts to deform in the bending direction with the connecting portion 37 having low rigidity as a fulcrum. And the reaction force of the hollow seal part 23 accompanying compression is transmitted to the outer lip part 29 (vehicle exterior) through the wall part 33, the connection part 37, and the wall part 35 like arrow S1-S3 in FIG.

  Here, if there is variation in the entry direction a of the weather strip 19 (factors such as variations in the mounting orientation, cross-sectional shape, and mounting surface of the weather strip 19), the hollow seal portion is normal (a structure without the partition wall 31). The reaction force from 23 escapes in a tilting direction, the reaction force balance acting on the inner lip portion 27 and the outer lip portion 29 changes, and the sealing force between the base portion 25 and the mounting surface 16 decreases. There is a fear.

However, since the partition wall 31 is provided in the hollow seal portion 23 of the weather strip 19 of the present embodiment, the reaction force that escapes is transmitted to the outer lip portion 29 through the wall portions 33 and 35 as described above.
For this reason, even if the weather strip 19 is deformed in a direction in which the sealing force of the outer lip portion 29 decreases due to variations in the entry direction a, the reaction force from the hollow seal portion 23 is surely applied to the outer lip portion 29. Subsequently, the sealing force of the outer lip portion 29 can be supplemented, and a sufficient sealing force is ensured for the outer lip portion 29 disposed on the vehicle outer side.

  Therefore, the outer lip portion 29 can secure a sufficient sealing force by the partition wall 31 regardless of variations in the entry direction a of the weather strip 19, and can provide a sufficient sealing force between the weather strip 19 and the mounting surface 16. it can. Thus, even if the weather strip 19 is flooded with rain water or car wash water as indicated by α in FIG. 4, it is ensured that the water will dive between the outer lip portion 29 and the mounting surface 16 from the outside of the vehicle and enter the vehicle. Can be prevented. Moreover, the partition wall 31 is a wall structure (pantograph type) that can be bent and deformed by combining a wall portion 33 extending from the inner surface near the tip of the hollow seal portion 23 and a wall portion 35 extending from the inner surface near the outer lip portion 29. Simple structure. In particular, since the wall portion 35 is thinner than the wall portion 33 and is more easily deformed than the wall portion 33, the wall portion 35 can be deformed even by a slight increase in compressive load caused by the crushing deformation of the hollow seal portion 23. Can deform even a slight variation.

5 and 6 show a second embodiment of the present invention.
In the present embodiment, a contact portion 41 is formed on a side portion of the wall portion 35 facing the hollow inner surface 25a on the base portion 25 side, and the contact portion 41 becomes the base as the hollow seal portion 23 is crushed and deformed. It is configured to come into contact with the hollow inner surface 25a on the part 25 side.
With this configuration, when the abutting portion 41 abuts against the hollow inner surface 25a as shown in FIG. 6, the entire hollow seal portion 23 is placed outside the vehicle with the connecting portion 37 as a fulcrum as indicated by an arrow X in FIG. A behavior of rotational displacement occurs. Then, the reaction force balance is changed by the rotational displacement, and the reaction force toward the outer lip portion 29 is increased. Therefore, the outer lip portion 29 can secure a sufficient sealing force.

However, in FIG. 5 and FIG. 6, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
It should be noted that each of the above-described embodiments and combinations thereof are merely examples, and that addition, omission, replacement, and other modifications of the configuration can be made without departing from the spirit of the present invention. Needless to say. Further, the present invention is not limited by the embodiment, and it is needless to say that the present invention is limited only by the “claims”. For example, in the above-described embodiment, the present invention is applied to the weather strip provided between the upper door and the lower door of the back door opening, but the present invention is not limited thereto, and the periphery of the back door opening and the back door It may be a weather strip between (upper door and lower door). Of course, the present invention may be applied to a weather strip attached between another door such as a front door and a rear door of a vehicle and the periphery of the opening of the vehicle body.

1 Car body 3 Back door opening (opening)
9a Upper door 14 Receiving seat 16 Mounting surface (weather strip mounting surface)
19 Weather strip 23 Hollow seal portion 25 Base portion 27 Inner lip portion (first lip portion)
29 Outer lip (second lip)
31 Partition 33 Wall (first wall)
35 Wall (second wall)
41 Contact part

Claims (2)

A weather strip that seals a peripheral edge of an opening / closing member that opens and closes an opening of a vehicle body,
A base fixed to the weatherstrip mounting surface;
A hollow seal portion projecting from the base portion to the opposite side of the weatherstrip mounting surface and having a hollow cross section whose tip is elastically contacted with a receiving seat,
The base portion includes a first lip portion that comes into contact with the weather strip mounting surface and a second lip portion that comes into contact with the weather strip mounting surface on the vehicle outer side than the first lip portion. ,
The hollow seal portion is formed so as to extend from an inner surface in the vicinity of the distal end portion to an inner surface in the vicinity of the second lip portion on the base side in the hollow seal portion, and the reaction force received at the distal end portion is the second. Having a bulkhead to transmit to the lip of
The partition wall extends from the inner surface of the hollow seal portion near the tip portion toward the center of the hollow seal portion, and from the inner surface of the hollow seal portion near the second lip portion of the base portion. A second wall portion extending to the center of the hollow seal portion and connected to the first wall portion;
The weather strip of the vehicle, wherein the second wall portion is formed thinner than the first wall portion.   2. The vehicle according to claim 1, wherein the second wall portion has an abutting portion that abuts against an inner surface of the hollow seal portion on the base side when the hollow seal portion is crushed and deformed. Weather strip.

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