JP5375000B2 - Door weather strip - Google Patents

Description

  The present invention relates to a door weather strip attached to a vehicle door.

  Conventionally, a door weather strip is attached to the periphery of a door of a vehicle such as an automobile. The door weather strip is made of, for example, EPDM (ethylene-propylene-diene copolymer) rubber, and has a mounting base, a hollow seal portion bulged from the mounting base, and a door from the mounting base. And a lip portion extending outward in the circumferential direction. And the door weather strip is attached with respect to a door periphery by the said attachment base part being fitted in the retainer of the door sash formed, for example by bending a metal plate in multiple times. Further, when the door is closed, the seal portion and the lip portion are in contact with or pressed against the periphery of the door opening of the vehicle body, and the space between the vehicle body and the door is sealed. In general, the door weather strip is generally formed of foam rubber from the viewpoint of reducing the weight.

  By the way, in recent years, there is an increasing demand for improving the sound insulation of the door weather strip. In view of this, a technique has been proposed in which a flexible tube filled with a fluid is disposed in a seal portion and vibrations transmitted through the meat portion of the seal portion are suppressed to prevent noise from entering the vehicle (for example, , See Patent Document 1). However, when this technique is adopted, it is necessary to separately provide a tube in the seal portion, which may lead to a decrease in workability and production efficiency and an increase in manufacturing cost.

On the other hand, by providing a hard layer made of foam rubber or the like having a specific gravity higher than that of the foam rubber at the inner part of the seal part, it absorbs noise that enters through the hollow part of the seal part, and has a sound insulating property. A technique for improving is known (see, for example, Patent Document 2).
JP 2003-341372 A Japanese Patent Laid-Open No. 10-236163

  However, as noise that intrudes into the inside of the vehicle, in addition to the noise that enters through the hollow portion of the seal portion described above, the noise passes through the inside of the mounting base and the lip portion to the flesh portion of the seal portion. There is noise that intrudes inside. Here, when the two paths are compared, the path transmitted from the mounting base or the lip portion to the flesh portion of the seal portion is easier to transmit vibration, and as a result, noise is more likely to enter. Therefore, even if the technique of Patent Document 2 is used, there is a possibility that the sound insulation cannot be sufficiently improved.

  In addition, the presence of the hard layer and the tube may cause a situation in which the flexible deformation of the seal portion is hindered in both the above technologies. For this reason, when the door is closed, the reaction force at the seal portion increases, and as a result, the door close load increases, which may make it difficult to ensure stable sealing performance. There is.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a door weather strip that can effectively suppress noise intrusion into a vehicle while ensuring stable sealing performance. It is in.

  In the following, each means suitable for solving the above-described object will be described in terms of items. In addition, the effect specific to the means to respond | corresponds as needed is added.

Means 1. A base portion disposed in a locked state with respect to a door sash mounting retainer located on the periphery of the door of the vehicle;
A vehicle inner side wall portion formed to extend from the base portion to the outer side in the circumferential direction of the door,
On the vehicle outer side than the vehicle inner side wall portion, the vehicle outer side wall portion formed to extend from the base portion to the outer side in the circumferential direction of the door, and
An outer peripheral end portion of the vehicle inner side wall portion, and an outer peripheral end portion of the vehicle outer side wall portion, and an attachment base portion having an outer peripheral wall portion facing the base portion;
A connecting portion formed to project from the vehicle inner side wall portion to the vehicle inner side;
A lip portion formed to extend from the outer peripheral wall portion to the outer side in the circumferential direction of the door;
It is connected to the vehicle inner side wall portion via the connecting portion, and includes a seal portion formed by hollow foam rubber,
When the door is closed, the seal portion and the lip portion are pressed against or abutted against the vehicle main body, thereby sealing between the door and the vehicle main body, and a door weather strip,
In the closed state of the door,
On the path from the outside region to the lip portion, the attachment base portion, and the root portion of the seal portion through the inside of the connecting portion, and
A vibration reducing portion made of a damping material having a loss coefficient tan δ at 20 ° C. of 0.1 or more on a path from the outside region to the attachment base portion and the root portion of the seal portion through the inside of the connecting portion. Is provided at only one location including at least the connecting portion, and the portion excluding the vibration reducing portion is formed of foamed rubber, and
The door weather strip, wherein the vibration reducing portion is not provided in the seal portion.

  According to the above means 1, on the path from the vehicle outer region to the root portion of the seal portion through the inside of the lip portion, the mounting base, and the connecting portion, and the inside of the mounting base portion and the connecting portion from the vehicle outer region. A vibration reducing portion is provided on a path that passes through the root portion of the seal portion. That is, the vibration reducing unit is provided on the vibration transmission path from the outside of the vehicle to the inside of the vehicle through the lip portion, the mounting base, and the like. For this reason, the presence of the vibration reducing portion that is relatively hard to vibrate with a loss coefficient tan δ at 20 ° C. of 0.1 or more can reduce the vibration transmitted through the inside of the lip portion, the mounting base portion, etc. Intrusion of noise can be effectively suppressed. As a result, a dramatic improvement in sound insulation can be achieved.

Further, the vibration reducing portion is not provided in the seal portion, but is formed on a path passing through the inside of the attachment base portion, the connection portion, or the like, that is, integrated with the attachment base portion, the connection portion, or the like. Therefore, a stable sealing property can be ensured without occurrence of an increase in reaction force at the seal portion.
Further, since the seal portion is connected to the mounting base (the vehicle inner side wall portion) via a connecting portion, the vibration reaching the seal portion through the inside of the lip portion, the mounting base, etc. It must pass through the connecting part. Therefore, if the vibration reducing portion is provided at least in the connecting portion as in the above-described means 1, vibration transmitted from the outside of the vehicle can be more reliably reduced, and sound insulation can be improved more reliably. In addition, if a vibration reducing portion is provided only at one location including the connecting portion without providing a plurality of vibration reducing portions, vibration can be sufficiently reduced, resulting in an increase in manufacturing costs and a complicated production process. Can be more reliably prevented.

  Furthermore, since the site | part except a vibration reduction part is formed with foamed rubber, it can aim at sufficient weight reduction about a door weather strip.

  Mean 2. In the cross section along the direction orthogonal to the longitudinal direction of the mounting base, the vibration reducing unit has a cross-sectional area of 5% or more and 20% or less of the total cross-sectional area of the mounting base, the connecting part, and the lip part. The door weather strip according to the means characterized by comprising.

  According to the above means 2, the vibration reducing portion is formed so that its cross-sectional area has a sufficient size of 5% or more of the total cross-sectional area of the mounting base portion, the connecting portion, and the lip portion. Therefore, vibration from the outside of the vehicle can be further reliably reduced, and the sound insulation can be further improved.

  Note that, from the viewpoint of further improving the sound insulation, it is preferable to increase the cross-sectional area of the vibration reducing portion. Therefore, the cross-sectional area of the vibration reducing portion is preferably 7% or more of the total cross-sectional area of the mounting base portion, the connecting portion, etc., and more preferably 10% or more of the total cross-sectional area. However, in order to fully demonstrate the effect of weight reduction by forming the mounting base portion, the connecting portion, and the lip portion (excluding the portion where the vibration reduction portion is formed) with foamed rubber, the vibration reduction portion It is desirable that the cross-sectional area is 20% or less of the total cross-sectional area.

  Means 3. The door weather strip according to means 1 or 2, wherein the vibration reducing portion is made of a rubber material having compatibility with a material forming the foam rubber.

  As the material for forming the foamed rubber, for example, when EPDM sponge rubber is used, the “material having compatibility with the material for forming the foamed rubber” includes EPDM rubber, which is the same kind of rubber material, NR / SBR (styrene-butadiene rubber copolymer), NR / BR (butadiene rubber), or the like can be used.

  According to the means 3, the vibration reducing portion is formed of a rubber material having compatibility with the material forming the attachment base portion, the connecting portion, and the like. Therefore, in forming the door weather strip, the vibration reducing portion can be extruded together with the mounting base portion and the connecting portion. As a result, the vibration reducing portion can be formed relatively easily and in an integrated state with the mounting base and the like, and the productivity can be further improved.

  Means 4. The door weather strip according to any one of means 1 to 3, wherein the vibration reducing portion is provided only in at least one of the connecting portion and the mounting base portion.

  According to the above means 4, the vibration reducing part is provided in the connecting part or the mounting base, and is not provided in the lip part. Therefore, when the door is closed, it is possible to prevent the deformation of the lip portion from being obstructed by the vibration reducing portion, and it is possible to secure a more stable sealing property.

  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 3 that can be opened and closed at an opening of a body 2 as a vehicle body. A door weather strip 4 is attached to the periphery of the door 3.

  As shown in FIG. 2, the door weather strip 4 is formed in an annular shape, and includes extrusion-molded portions 5 and 6 and mold-molded portions 7 and 8 (portions with a dotted pattern in the figure). It is composed of The extrusion molding parts 5 and 6 are formed in an elongated shape by an extruder (not shown), while the mold molding parts 7 and 8 connect end edges of adjacent extrusion molding parts 5 and 6. Thus, it is formed by a predetermined mold apparatus.

  As shown in FIG. 3, the door weather strip 4 includes an attachment base 11, a lip portion 12, and a seal portion 13, and most of the attachment base portion 11, the lip portion 12, and the seal portion 13 include It is formed of EPDM sponge rubber as foam rubber.

  The mounting base portion 11 has an elongated shape, and includes a base portion 14, a vehicle inner side wall portion 15, a vehicle outer side wall portion 16, and an outer peripheral wall portion 17. The base portion 14 is attached to the attachment retainer 32 of the door sash 31 of the door 3 when the door weather strip 4 is mounted on the periphery of the door 3. More specifically, the mounting retainer 32 is formed on the inner side of the vehicle and has a first locking portion 33 having a substantially L-shaped cross section, and a second locking portion formed on the outer side of the vehicle and having a substantially L-shaped cross section. And a locking portion 34. The vehicle interior end edge portion of the base portion 14 is disposed in a locked state with respect to the first locking portion 33, and the vehicle exterior end edge portion of the base portion 14 is disposed in the second locking portion 34. The base portion 14 is attached to the attachment retainer 32 by being disposed in a locked state. In the present embodiment, the mounting retainer 32 is formed by bending a plurality of metal plates a plurality of times.

  Further, the vehicle interior side wall portion 15 is formed to extend from a portion located on the vehicle interior side of the base portion 14 to the outer peripheral side of the door 3, and a tip portion thereof is a first engagement of the mounting retainer 32. It is comprised so that it may be located in the outer peripheral side rather than the stop part 33. FIG. Further, the vehicle outer side wall portion 16 is formed to extend from a portion of the base portion 14 located on the vehicle outer side to the outer peripheral side.

  The outer peripheral wall portion 17 is formed so as to connect between an outer peripheral end portion (tip edge) of the vehicle inner side wall portion 15 and an outer peripheral end portion (tip edge) of the vehicle outer side wall portion 16. , Opposite to the base portion 14. Further, a sub lip portion 18 extending to the vehicle outer side is provided in the vicinity of the connecting portion with the outer peripheral wall portion 18 in the vehicle outer side wall portion 16, and the second lip portion 18 is provided by the sub lip portion 18. The stop 34 is covered.

  Further, the lip portion 12 is formed to extend from the vehicle outer side end portion of the outer peripheral wall portion 17 to the outer peripheral side of the door 3, and when the door 3 is closed, the front end portion of the lip portion 12 is the body portion. 2 is in pressure contact with the peripheral edge of the door opening (see FIG. 4).

  The seal portion 13 is hollow and bulges toward the inside of the vehicle. Further, the seal portion 13 is connected to the vehicle interior side wall portion 15 of the mounting base portion 11 via a connecting portion 21. More specifically, the seal portion 13 is provided on the vehicle interior side wall portion 15 via a connecting portion 21 projecting from a region between the tip edge of the vehicle interior side wall portion 15 and the first locking portion 33. Is connected to In addition, the said connection part 21 has comprised the elongate shape extended along the longitudinal direction of the said attachment base part 11, and is formed in comparatively thin wall.

  In addition, in the vicinity of the portion of the seal portion 13 that is connected to the connecting portion 21, a protrusion 26 that protrudes toward the inner peripheral side is formed. The protrusion 26 extends along the longitudinal direction of the attachment base 11 and abuts against the outer peripheral side end surface of the first locking portion 33 in a state where the attachment base 11 is attached to the attachment retainer 32. It has become.

  A relatively thick portion of the seal portion 13 located inside the vehicle is pressed against the seal surface 35 formed on the body 2 when the door 3 is closed. . For this reason, when the door 3 is closed, as shown in FIG. 4, the seal portion 13 of the seal portion 13 and the connecting portion 21 is crushed substantially equally toward the outer peripheral side and the inner peripheral side. The door 3 is sealed.

  In the present embodiment, the vehicle interior side wall portion 15 and the connecting portion 21 are made of EPDM solid rubber, and constitute a vibration reducing portion 41. That is, when the door 3 is closed, the vibration reducing unit 41 passes through the inside of the lip portion 12, the mounting base portion 11 (the outer peripheral wall portion 17 and the vehicle inner side wall portion 15), and the inside of the connecting portion 21 from the outside region of the vehicle. 13 on the route A leading to the root portion of 13, and on the routes B and C extending from the outside region to the attachment base portion 11 and the inside of the connecting portion 21 to the root portion of the seal portion 13. Is formed. The vibration reduction part 41 extends along the longitudinal direction of the mounting base 11, and the EPDM solid rubber forming the vibration reduction part 41 is a high-density material and has a loss coefficient tan δ at 20 ° C. It is set to 0.1 or more.

  Furthermore, in the cross section along the direction orthogonal to the longitudinal direction of the mounting base portion 11, the vibration reducing portion 41 is 5% or more and 20% or less of the total cross-sectional area of the mounting base portion 11, the coupling portion 21, and the lip portion 12. It is configured to have a cross-sectional area (for example, 10%).

  Next, a method for manufacturing the weather strip 4 will be described.

  First, an extrusion molding machine including a first die having an opening hole for forming the vibration reducing portion 41 and a second die (not shown) having an opening hole for forming the door weather strip 4. EPDM unvulcanized rubber is continuously supplied to (not shown). Thereby, the 1st intermediate body (not shown) which comprises the said vibration reduction part 41 is extrusion-molded from the said 1st die | dye.

  Next, EPDM unvulcanized rubber (EPDM unvulcanized foam rubber) containing a predetermined amount of foaming agent is continuously supplied to the extruder. Then, a second intermediate body (not shown) in which the first intermediate body is integrated with the EPDM unvulcanized foamed rubber is extruded from the second die. Note that the EPDM unvulcanized foamed rubber constitutes a portion (for example, the lip portion 12 or the seal portion 13) of the EPDM sponge rubber in the door weather strip 4.

  Further, the extruded second intermediate is guided to a high-frequency vulcanization tank (UHF) (not shown) and subjected to primary vulcanization. Thereafter, it is guided to a hot air vulcanized layer (HAV) (not shown) and subjected to secondary vulcanization. As a result, the unvulcanized rubber is vulcanized and the foaming agent is foamed to obtain the extruded portions 5 and 6.

  Next, after using a predetermined mold apparatus, the doors are formed by forming the mold parts 7 and 8 by using a known mold forming method so as to connect the extrusion parts 5 and 6. A weather strip 4 is obtained.

  Next, in order to confirm the effect in the above embodiment, a door weather strip sample (invention) provided with a vibration reducing portion and a door weather strip sample (conventional) configured without providing a vibration reducing portion. And both samples were subjected to a sound insulation degree evaluation test. The outline of the sound insulation evaluation test is as follows. That is, after each sample was cut into a predetermined length (100 mm), the cut sample was attached to a test bench having an attachment portion having the same shape as the attachment retainer. Then, the same state as when the door was closed was created by pressing the cut sample with a predetermined pressing machine under a load substantially equal to the load when the door was closed (that is, the vehicle outer region and the vehicle inner region were sampled). In addition, a noise of 100 dBA is generated from the microphone arranged on the lip portion side (vehicle outer side) and the microphone arranged on the seal portion side (vehicle inner side). The noise that passed through the sample was received, and the magnitude (dBA) of the noise was measured. In addition, a numerical value (sound insulation level) obtained by subtracting the measured noise magnitude from 100 dBA was calculated, and the noise reduction ability of both samples was confirmed. FIG. 5 shows the sound insulation levels of the invention product and the conventional product, respectively.

  As shown in FIG. 5, it became clear that the invention product has an excellent noise reduction capability. This is considered to be due to the fact that the vibration transmitted through the sample can be reduced by the vibration absorbing portion, and by extension, the arrival of vibration to the inside of the vehicle can be effectively suppressed.

  As described in detail above, according to the present embodiment, on the path A from the vehicle outer region to the root portion of the seal portion 13 through the inside of the lip portion 12, the mounting base portion 11, and the connecting portion 21, and A vibration reducing portion 41 is provided on paths B and C that extend from the outside region of the vehicle to the attachment base portion 11 and the inside of the connecting portion 21 to the root portion of the seal portion 13. That is, the vibration reduction part 41 is provided on the vibration transmission path from the outside of the vehicle to the inside of the vehicle through the lip part 12 and the mounting base part 11. Therefore, the presence of the vibration reducing portion 41 that is relatively difficult to vibrate with a loss coefficient tan δ at 20 ° C. of 0.1 or more reduces vibrations that transmit noise through the inside of the lip portion 12 and the mounting base portion 11. As a result, intrusion of noise into the vehicle interior can be effectively suppressed. As a result, a dramatic improvement in sound insulation can be achieved.

  Further, the vibration reducing portion 41 is formed integrally with the mounting base portion 11 and the connecting portion 21 without being provided in the seal portion 13. Therefore, a stable sealing performance can be ensured without occurrence of an increase in reaction force in the seal portion 13.

  Further, since the portion of the door weather strip 4 excluding the vibration reducing portion 41 is formed of EPDM sponge rubber, the door weather strip 4 can be sufficiently reduced in weight.

  In addition, the vibration reduction part 41 is formed so that its cross-sectional area has a sufficient size of 5% or more of the total cross-sectional area of the mounting base part 11, the coupling part 21, and the lip part 12. Therefore, vibration from the outside of the vehicle can be more reliably reduced, and the sound insulation can be further improved. On the other hand, since the cross-sectional area of the vibration reducing portion 41 is 20% or less of the total cross-sectional area, the attachment base portion 11, the connecting portion 21, and the lip portion 13 (parts where the vibration reducing portion 41 is formed respectively). Can be sufficiently exerted the effect of weight reduction.

  In addition, the vibration reducing portion 41 is formed of EPDM solid rubber having compatibility with the material (EPDM sponge rubber) forming the attachment base portion 11, the coupling portion 21, and the like. Therefore, when the door weather strip 4 is formed, the vibration reducing portion 41 can be extruded together with the mounting base portion 11, the connecting portion 21, and the like. As a result, the vibration reducing portion 41 can be formed relatively easily and in an integrated state with the mounting base portion 11 and the like, and the productivity can be further improved.

  In addition, the vibration reduction part 41 is provided in the connecting part 21 and the attachment base part 11 and is not provided in the lip part 12. Therefore, when the door 3 is closed, the deformation of the lip portion 12 can be prevented from being inhibited, and a more stable sealing performance can be ensured.

  Further, since the seal portion 13 is connected to the mounting base portion 11 (the vehicle interior side wall portion 15) via the connecting portion 21, the seal portion 13 passes through the inside of the lip portion 12, the mounting base portion 11 and the like. The vibration that reaches the point always passes through the connecting portion 21. Therefore, if the vibration reduction part 41 is provided at least in the connecting part 21 as in the present embodiment, vibration due to noise from the outside of the vehicle can be reliably reduced, and sound insulation is improved more reliably. Can do. In addition, if the vibration reducing unit 41 is provided only at one location including the connecting portion 21 without providing the plurality of vibration reducing units 41, the vibration can be sufficiently reduced. It is possible to more reliably prevent the process from becoming complicated.

  Further, the seal portion 13 is formed to bulge from the vehicle inner side wall portion 15 of the mounting base portion 11 toward the vehicle inner side. Thereby, the seal portion 13 bends not only in the space between the outer peripheral wall portion 17 of the mounting base 11 and the body 2 but also in the space between the vehicle interior side wall portion 15 of the mounting base 11 and the body 2. Thus, even when the gap between the mounting retainer 32 and the body 2 is relatively small, sufficient sealing performance can be ensured.

  Furthermore, since the seal portion 13 is connected to the vehicle interior side wall portion 15 via the connecting portion 21, the seal portion 13 can be elastically deformed in most portions except for a portion connected to the connecting portion 21. As a result, when the door 3 is closed, an increase in the door closing load accompanying an increase in the reaction force in the seal portion 13 can be more reliably prevented, and a more stable sealing performance can be ensured.

  On the other hand, there is a concern that the seal position may become unstable due to the configuration in which most of the seal portion 13 can be elastically deformed. In the present embodiment, in the vicinity of the connecting portion 21 (root portion) of the seal portion 13. In addition, a protrusion 26 that abuts against the first locking portion 33 of the mounting retainer 32 is formed. Thereby, the part corresponding to the protrusion 26 among the seal parts 13 will be supported reliably. Therefore, the position of the seal portion 13 can be stabilized, and a more stable sealing performance can be realized. In addition, the stress when the door 3 is closed is dispersed by the protrusion 26 coming into contact with the first locking portion 33. For this reason, it is possible to prevent damage caused by the base of the seal portion 13 or the base of the connecting portion 21 strongly hitting the tip of the first locking portion 33. That is, by providing the protrusion 26, the effects of realizing more stable sealing performance and preventing damage to the seal portion 13 and the like are exhibited at once.

  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 above embodiment, the vibration reducing portion 41 is formed on the vehicle interior side wall portion 15 and the connecting portion 21, but the vibration reducing portion 41 only needs to be formed on the route A and the routes B and C. The formation position is not particularly limited. Therefore, for example, as shown in FIG. 6, the vibration reducing portion 42 is provided at the boundary portion between the vehicle inner side wall portion 15 and the outer peripheral wall portion 17, and the vibration reducing portion 43 is provided at the boundary portion between the base portion 14 and the vehicle inner side wall portion 15. It is good also as providing. Further, as shown in FIG. 7, a vibration reducing unit 44 may be provided in the base part 14 instead of the vibration reducing part 43 formed at the boundary portion between the base part 14 and the vehicle interior side wall part 15. Even in this case, basically, the same effect as the above-described embodiment is achieved.

  (B) In the above embodiment, EPDM solid rubber is exemplified as a material for forming the vibration reducing unit 41, but the material for forming the vibration reducing unit 41 is not limited to this. Therefore, the vibration reducing portion 41 is formed using relatively high density NR / SBR (styrene-butadiene rubber copolymer), NR / BR (butadiene rubber), IIR (isobutylene / isoprene copolymer), and the like. Also good.

  (C) In the above embodiment, the door weather strip 4 provided on the periphery of the door 3 on the body side corresponding to the (side front) door 3 is embodied, but the rear door, the back door, the luggage door (trunk lid), The present invention can also be applied to door weather strips provided on the periphery of other doors such as a roof door (sliding roof panel).

It is a perspective view which shows a motor vehicle. It is a front view which shows a door weather strip. It is the JJ sectional view taken on the line of FIG. It is sectional drawing which shows the seal | sticker part etc. in the time of a door closing. It is a graph which shows the result of a sound insulation degree evaluation test. It is sectional drawing which shows the formation position of the vibration reduction part in another embodiment. It is sectional drawing which shows the formation position of the vibration reduction part in another embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Automobile as a vehicle, 2 ... Body as a vehicle main body, 3 ... Door, 4 ... Door weather strip, 11 ... Mounting base, 12 ... Lip part, 13 ... Seal part, 14 ... Base part, 15 ... Inside the car Side wall part 16 ... Car outer side wall part, 17 ... Outer peripheral wall part, 21 ... Connecting part, 31 ... Door sash, 32 ... Mounting retainer, 41, 42, 43, 44 ... Vibration reducing part.

Claims (4)

A base portion disposed in a locked state with respect to a door sash mounting retainer located on the periphery of the door of the vehicle;
A vehicle inner side wall portion formed to extend from the base portion to the outer side in the circumferential direction of the door,
On the vehicle outer side than the vehicle inner side wall portion, the vehicle outer side wall portion formed to extend from the base portion to the outer side in the circumferential direction of the door, and
An outer peripheral end portion of the vehicle inner side wall portion, and an outer peripheral end portion of the vehicle outer side wall portion, and an attachment base portion having an outer peripheral wall portion facing the base portion;
A connecting portion formed to project from the vehicle inner side wall portion to the vehicle inner side;
A lip portion formed to extend from the outer peripheral wall portion to the outer side in the circumferential direction of the door;
It is connected to the vehicle inner side wall portion via the connecting portion, and includes a seal portion formed by hollow foam rubber,
When the door is closed, the seal portion and the lip portion are pressed against or abutted against the vehicle main body, thereby sealing between the door and the vehicle main body, and a door weather strip,
In the closed state of the door,
On the path from the outside region to the lip portion, the attachment base portion, and the root portion of the seal portion through the inside of the connecting portion, and
A vibration reducing portion made of a damping material having a loss coefficient tan δ at 20 ° C. of 0.1 or more on a path from the outside region to the attachment base portion and the root portion of the seal portion through the inside of the connecting portion. Is provided at only one location including at least the connecting portion, and the portion excluding the vibration reducing portion is formed of foamed rubber, and
The door weather strip, wherein the vibration reducing portion is not provided in the seal portion.   In the cross section along the direction orthogonal to the longitudinal direction of the mounting base, the vibration reducing unit has a cross-sectional area of 5% or more and 20% or less of the total cross-sectional area of the mounting base, the connecting part, and the lip part. The door weather strip according to claim 1, comprising:   The door weather strip according to claim 1 or 2, wherein the vibration reducing portion is formed of a rubber material having compatibility with a material forming the foam rubber.   The door weather strip according to any one of claims 1 to 3, wherein the vibration reducing portion is provided only in at least one of the connecting portion and the attachment base portion.

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