JP2008184040A - Door weather strip - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door weather strip for an automobile having good sealability and small door closing force. <P>SOLUTION: This door weather strip 10 comprises a mounting base part 20 and a hollow seal part 30. The hollow seal part 30 is annularly formed of a vehicle outside circular arc part 31, a circular arc part connection part 36, a circular arc part bottom part 35, and a vehicle inside circular arc part 32. In the connected portion of the vehicle inside circular arc part 32 and the vehicle outside circular arc part 31, a circular arc part step part 37 is so formed that the vehicle outside circular arc part 31 is lower than the vehicle inside circular arc part 32, and an circular arc top part 34 projecting from the circular arc part step part 37 is formed. The vehicle inside circular arc part 32 has a vehicle inside circular arc part thick part 33 formed thicker than the other hollow seal part from the circular arc part top part 34 to the vehicle inside. The circular arc part connection part 36 and the circular arc part bottom part 35 are bent and connected to each other at an circular arc part bending part 38. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a door weather strip for an automobile that seals between the door of the automobile and the periphery of the opening of the vehicle body.

As shown in FIG. 5, the seal between the door 1 of the automobile and the peripheral edge 6 of the vehicle body is attached to the door weather strip 110 attached to the outer peripheral portion of the door 1 and / or the flange on the peripheral edge of the vehicle body opening. It is made by an opening weather strip (not shown). The door 1 includes a door body and a door frame 2. Further, the seal between the door glass 5 and the door frame 2 is made by a glass run (not shown) attached to an inner peripheral channel of the door frame 2.

  As shown in FIG. 6, the door weather strip 110 attached to the outer periphery of the upper side of the door frame 2 of the door 1 includes an attachment base 120 and a hollow seal portion 130 and a sub seal portion 140 formed integrally on the upper surface thereof. Consists of The mounting base 120 is fitted into the retainer 4 provided on the outer periphery of the door frame 2 and is fixed to the door frame 2. When the door is closed, the sub seal portion 140 contacts the outermost side edge of the vehicle body opening periphery 6 or contacts the lower surface of the vehicle opening periphery 6 on the vehicle outer side, and the outer periphery of the door frame 2 and the vehicle body opening. The gap between the part periphery 6 and the outside of the vehicle is sealed. The hollow seal portion 130 is in contact with the bulging portion on the inner side of the vehicle rather than the portion where the sub seal portion 140 is in contact with the periphery 6 of the opening of the vehicle body to seal between the door 1 and the periphery 6 of the opening of the vehicle body.

As shown in FIG. 6, the hollow seal portion 130 is formed so as to protrude toward the inside of the vehicle so as to suppress the height of the hollow seal portion 130 in order to reduce the gap between the door frame 2 and the vehicle body opening periphery 6. (For example, see Patent Document 1 and Patent Document 2.)
For this reason, the gap between the door frame 2 and the vehicle body opening peripheral edge 6 changes due to the variation in the installation of the door 1, and the contact force when the hollow seal portion 130 contacts the vehicle body opening peripheral edge 6 or the hollow seal portion. In some cases, the seal seal width with which 130 abuts greatly changes and the sealing performance deteriorates.

In addition, the door frame 2 vibrates in the vehicle width direction due to the vibration of the vehicle when the vehicle travels, or the hollow seal portion 130 is sucked out to the outside of the vehicle when traveling at a high speed, so that the hollow seal portion 130 is formed on the periphery 6 of the vehicle body opening. In some cases, the abutting position and the amount of bending of the hollow seal portion 130 are reduced, and the sealing performance between the hollow seal portion 130 and the vehicle body opening peripheral edge 6 is deteriorated.

Furthermore, in order to improve the sealing performance, as shown in FIG. 7, there is a type in which the hollow seal portion 230 is greatly extended toward the inside of the vehicle and the lower end of the hollow seal portion 230 is held in contact with the door frame 2 ( (For example, see Patent Document 3 and Patent Document 4.)
In this case, in order to bring the hollow seal portion 230 into contact with the door frame 2, the seal wall of the hollow seal portion 230 when the door is closed comes into contact with the vehicle body opening peripheral edge 6 in a direction orthogonal thereto, and the deflection load is large. As a result, the door closing force increases.

JP-A-7-195939 Japanese Unexamined Patent Publication No. 7-215062 JP 2006-282086 A JP 2005-119346 A

  Therefore, an object of the present invention is to provide a door weather strip for automobiles that has a good sealing property of the door weather strip and a small door closing force.

In order to solve the above problem, the present invention of claim 1 is a door weather strip that seals between a door of a vehicle and a peripheral edge of a vehicle body opening and is attached to an upper side of an outer peripheral portion of the door frame of the door.
The door weather strip attached to the upper side of the door includes a mounting base that is attached to a retainer provided on the outer peripheral portion of the door frame, and a door and the vehicle body opening that are formed integrally with the mounting base and abut against the periphery of the vehicle body opening. It has a seal part that seals between the periphery,
The seal portion has a hollow seal portion that abuts the periphery of the vehicle body opening, and the hollow seal portion is formed so as to protrude in the vehicle interior direction and extends obliquely upward in the vehicle interior direction from the upper surface of the mounting base portion. An arc portion, an arc portion connecting portion extending obliquely downward from the vehicle inner side end of the mounting base toward the door frame, and an arc extending in parallel to the door frame in the vehicle inward from the tip of the arc portion connecting portion It is formed in an annular shape from the bottom part and the inner arc part connected to the tip of the outer arc part in an arc shape from the tip of the arc part bottom part,
The connecting portion between the vehicle inner arc portion and the vehicle outer arc portion is formed with an arc portion step portion so that the vehicle outer arc portion is lower than the vehicle inner arc portion, and an arc protruding above the arc portion step portion The top is formed,
The vehicle inner side arc part has a car inner side arc part thick part formed thicker than the other hollow seal part in the car interior direction from the arc part top part, and the arc part connecting part and the arc part bottom part are the arc part. It is a door weather strip bent and connected at a bent portion.

In the first aspect of the present invention, the door weather strip attached to the upper side of the door is attached to the retainer provided on the outer periphery of the door, and the mounting base is integrally formed with the peripheral edge of the vehicle body opening. It has a seal portion that contacts and seals between the door and the periphery of the vehicle body opening. For this reason, the door weather strip is securely attached to the outer periphery of the door by the attachment base, the seal portion is held in a predetermined position, and when the door is closed, the seal portion abuts the periphery of the opening of the vehicle body, A gap between the periphery of the vehicle body opening can be sealed.

Since the seal portion has a hollow seal portion that comes into contact with the periphery of the vehicle body opening, the seal can be elastically and reliably contacted and sealed in accordance with the shape of the periphery of the vehicle body opening when the door is closed. Since the hollow seal portion is formed so as to protrude in the vehicle interior direction, the height of the hollow seal portion can be reduced, the gap between the periphery of the vehicle body opening and the door frame can be reduced. preferable.

The hollow seal portion includes an outer arc portion extending obliquely upward in the vehicle interior direction from the upper surface of the attachment base portion, and an arc portion connecting portion extending obliquely downward toward the door frame from the inner side end of the attachment base portion. And an arcuate bottom portion extending in parallel to the door frame in the vehicle interior direction from the tip of the arcuate portion connecting portion, and an inward arcuate portion connected to the tip of the outer arcuate portion in an arc shape from the tip of the arcuate bottom portion; Is formed in an annular shape. For this reason, the hollow seal portion has a hollow shape projecting to the inside of the vehicle and can be held on the upper surface of the mounting base and the inside of the door frame. When the door is closed, the outside arc portion and the inside arc portion are bent. Therefore, the door closing force can be reduced and the sealing performance can be secured.

The connecting portion between the car inner arc part and the car outer arc part is formed with an arc part step so that the car outer arc part is lower than the car inner arc part. When contacting the periphery, the stepped portion of the arc portion bends, the central portion of the outer arc portion of the vehicle projects to the outside of the vehicle substantially parallel to the periphery of the vehicle body opening portion, and the outer arc portion of the vehicle contacts the periphery of the vehicle body opening portion. Can be prevented and the door closing force can be reduced.
Since the top of the arc portion protruding above the step portion of the arc portion is formed, when the door is closed, the top portion of the arc portion reliably comes into contact with the periphery of the opening of the vehicle body in a line contact manner, and sealing performance can be ensured.

Since the vehicle inner arc portion has a vehicle inner arc portion thick portion formed thicker than other hollow seal portions in the vehicle interior direction from the top of the arc portion, the vehicle inner arc portion thick portion and the vehicle body opening peripheral edge When the door is closed, the central portion of the inner arc portion can bulge and bend toward the inside of the vehicle parallel to the door frame, and the outer arc portion can bulge and bend along the periphery of the vehicle body opening at the center portion. In combination with this, the door closing force can be reduced. In addition, the amount of bending of the hollow seal portion can be increased, the door assembly variation becomes large, and the sealing performance can be ensured even if the gap between the door frame and the vehicle body opening periphery increases. .

Since the arc portion connecting portion and the arc portion bottom portion are bent and connected at the arc portion bent portion, the arc portion bottom portion can be formed to be parallel to the door frame, and the hollow seal portion can be stably held. When the vehicle outer arc portion and the vehicle inner arc portion bend when the door is closed, the arc portion bent portion can be bent so that the hollow seal portion can be bent easily, and the door closing force can be reduced. it can.

According to a second aspect of the present invention, the bottom of the arc portion is a door weather strip that abuts against the door frame.

In the present invention of claim 2, since the bottom of the arc portion is in contact with the door frame, the bottom of the hollow seal portion can be stably held by the door frame, the position of the hollow seal portion is stabilized, and the seal Sex can be secured.

According to a third aspect of the present invention, the bottom of the arc portion is formed with an arc bottom portion projecting portion that protrudes from the lower surface, and the arc bottom portion projecting portion is a door weather strip that comes into contact with the door frame.

In the third aspect of the present invention, the bottom portion of the arc portion is formed with the bottom portion projecting portion of the arc portion projecting from the lower surface thereof, and the bottom portion projecting portion of the arc portion is brought into contact with the door frame. The hollow seal part can be stably held on the door frame, ensuring sealing performance, and the bottom of the arc part can easily slide with the door frame when the door is closed. The closing force can be reduced.

According to a fourth aspect of the present invention, the hollow seal portion is a door weather strip in which the central portion of the vehicle outer arc portion protrudes toward the vehicle outer side so as not to contact the periphery of the vehicle body opening when the door is closed.

In the present invention of claim 4, the hollow seal portion is bent by the central portion of the vehicle outer side arc portion protruding to the vehicle outer side so as not to come into contact with the periphery of the vehicle body opening when the door is closed. It becomes easy and the door closing force can be reduced.

According to the present invention of claim 5, the hollow seal portion bends so that the arc portion bent portion is opened when the door is closed, and the arc portion bottom portion is in contact with the door frame in the vicinity of the continuous portion with the vehicle inner arc portion. This is a door weather strip that bends so that a portion close to the bent portion is separated from the door frame.

In the present invention of claim 5, the hollow seal portion is bent so that the arc portion bent portion is opened when the door is closed, and the arc portion bottom portion is in contact with the door frame in the vicinity of a continuous portion with the vehicle inner arc portion. Since the portion close to the bent portion bends away from the door frame, the bottom of the arc portion is deformed as the inside arc portion is bent, and the inside arc portion is easily bent, and the door closing force can be reduced.

According to the present invention of claim 6, the seal portion seals between the front end of the outer peripheral portion of the door and the vehicle outer side end of the periphery of the vehicle body opening, and the vehicle body on the vehicle inner side than the portion where the sub seal portion abuts. It is a door weather strip formed from the hollow seal part which contact | abuts to the opening part periphery.

In the present invention of claim 6, the seal portion seals between the front end of the outer peripheral portion of the door and the vehicle outer side edge of the periphery of the vehicle body opening, and the vehicle body on the vehicle inner side than the portion where the sub seal portion abuts. It forms from the hollow seal part which contact | abuts to the opening part periphery. For this reason, a double seal | sticker can be carried out by a sub seal part and a hollow seal part, and sealing performance is high. In addition, the sub seal portion can close the gap between the front end of the outer peripheral portion of the door and the vehicle outer side of the periphery of the vehicle body opening, and the appearance between the door and the periphery of the vehicle body opening is good.

The present invention of claim 7 is a door weather strip in which a part of the mounting base is formed of a solid material and the other part is formed of a sponge material.

In the present invention of claim 7, since a part of the mounting base is formed of a solid material, it is possible to prevent the entire door weather strip from being stretched at the time of mounting to the door frame, and to hold the mounting base by the retainer. .
Since the other portions of the door weather strip are formed of a sponge material, the door weather strip can be flexibly deformed to ensure sealing performance, and the weight of the entire door weather strip can be reduced.

In the hollow seal portion of the present invention, since the arc portion step portion is formed at the connecting portion between the vehicle inner arc portion and the vehicle outer arc portion, the arc portion step portion bends when the door is closed, and the vehicle outer arc portion becomes the vehicle outer side. It is possible to prevent the outer arc portion from coming into contact with the periphery of the vehicle body opening.
Since the vehicle interior arc portion has a vehicle interior arc portion thick portion, when the door is closed, the vehicle exterior arc portion swells along the periphery of the vehicle body opening at the center portion, and the door closing force can be reduced.
The arc portion connecting portion and the arc portion bottom portion are bent and connected at the arc portion bent portion, so that the arc portion bent portion can be bent when the door is closed, and the hollow seal portion is easily bent, and the door closing force Can be reduced.

An embodiment of the present invention will be described with reference to FIGS.
FIG. 5 is a side view of the automobile. As shown in FIG. 5, in a door 1 of an automobile, a door frame 2 is provided on the outer periphery of the upper portion of the door body, and a door glass 5 is attached to the door 1 so as to be movable up and down. A door weather strip 10 is attached to the outer periphery of the door 1 and door frame 2 to seal between the door 1 and the periphery 6 of the vehicle body opening.

A channel 3 is provided on the inner periphery of the door frame 2, and a glass run (not shown) is attached in the channel 3 to guide the raising and lowering of the door glass 5, and the door glass 5 and the door frame 2. It is sealed between.
A door molding 50 is attached to the front end of the door frame 2 outside the vehicle.

1 to 3 are each taken along the line AA in FIG. 5 of the door weather strip 10 attached to the door frame 2 on the upper side of the door 1 according to the first to second embodiments of the present invention. It is sectional drawing. FIG. 4 is a front view of the entire door weather strip 10.
As shown in FIG. 4, the door weather strip 10 has an upper side straight portion 11 and a vertical side portion and a lower side straight portion 13 which are formed into a long shape by extrusion and are formed at the corners of the door frame 2. The corresponding corner portion 12 is formed by molding and connects the straight portion 11 and the straight portion 13.

First, the door weather strip 10 of the first embodiment attached to the upper side of the door frame 2 will be described with reference to FIGS. 1 and 2. FIG. 1 shows the shape when the door weather strip 10 is attached to the door frame 2. FIG. 2 shows the shape of the hollow seal portion 30 of the door weather strip 10 attached to the door frame 2 when the door is closed. It is in contact with the vehicle body opening edge 6 and shows a bent state.

The upper side of the door weather strip 10 is constituted by a straight portion 11 extruded as shown in FIG. 4, and the cross-sectional shape thereof is an attachment base portion 20 attached to the retainer 4 provided on the outer periphery of the door frame 2. The seal portion is formed integrally with the upper surface of the mounting base portion 20.

The seal portion is formed at the vehicle outer side end of the upper surface of the mounting base 20 and is similar to the sub seal portion 40 that seals between the front end of the outer peripheral portion of the door frame 2 and the vehicle outer side edge of the vehicle body opening peripheral edge 6. It is formed of a hollow seal portion 30 having a hollow shape that is formed on the upper surface of the mounting base portion 20 on the inner side of the vehicle and slightly contacts the vehicle body opening peripheral edge 6 on the inner side of the vehicle rather than the portion where the sub seal portion 40 contacts.

  The mounting base 20 is formed in a substantially triangular shape with a thick vehicle outer side in the cross section. The mounting base 20 includes a mounting base bottom side 21 fitted into a retainer 4 provided on the outer periphery of the door frame 2, a mounting base upper side 28 in which the hollow seal part 30 and the sub seal part 40 are extended, and a mounting base bottom. It has a substantially triangular hollow mounting base hollow portion 23 formed between the portion 21 and the mounting base upper side portion 28. Since the mounting base hollow portion 23 is provided, the weight of the door weather strip 10 can be reduced, and the flexibility of the mounting base 20 can be improved.

The mounting base bottom portion 21 has side end protruding portions 22, 22 protruding at both side ends, and the side end protruding portions 22, 22 are fitted into end portions of the retainer 4 having a C-shaped cross section. For this reason, the retainer 4 holds the mounting base 20 firmly and stably, and the hollow seal portion 30 and the sub-seal portion 40 can be brought into contact with a predetermined position of the vehicle body opening peripheral edge 6 to ensure sealing performance. Can do.

The upper side of the mounting base 20 is formed with a sloped mounting base upper side 28 which is lower on the inner side of the vehicle and higher on the outer side of the vehicle. Provided integrally. The sub seal part 40 will be described later.
The hollow seal portion 30 is formed so as to project inward from the vehicle inner side end of the attachment base upper side portion 28.

The shape of the hollow seal portion 30 has a substantially elliptical cross section extending in the vehicle interior direction, and includes a vehicle outer arc portion 31, a vehicle inner arc portion 32, an arc portion bottom portion 35, and an arc portion connecting portion 36 connected in an annular shape. Has been.
The vehicle outer arc portion 31 extends in an arc shape obliquely upward in the vehicle interior direction from the upper surface side end of the attachment base upper side portion 28 of the attachment base 20. The thickness of the outer arc portion 31 is substantially constant. When the door is closed, as shown in FIG. 2, the outer arcuate portion 31 bends and bends so that the central portion projects outwardly in parallel with the vehicle body opening peripheral edge 6. The bent outer arcuate portion 31 is less likely to come into contact with the vehicle body opening periphery 6 and thus does not increase the door closing force.

The vehicle interior arc portion 32 is formed in an arc shape downward from the tip of the vehicle exterior arc portion 31 toward the door frame 2. Formed thicker than the other parts in the length of about one third to half of the total length of the inner arcuate portion 32 downward from the upper portion of the inner arcuate portion 32, that is, the connecting portion with the outer arcuate portion 31. An in-vehicle arcuate thick portion 33 is provided. Therefore, when the door is closed, as shown in FIG. 2, the vehicle inner arc portion thick portion 33 is in close contact with the vehicle body opening peripheral edge 6, and the vehicle inner arc portion thick portion 33 is not bent. The vicinity of the center of 32 can bulge and bend toward the vehicle interior parallel to the door frame 2. For this reason, it is possible to reduce the door closing force in combination with the fact that the vehicle outer side arc portion 31 swells and bends in parallel with the vehicle body opening peripheral edge 6 at the center portion.

Since the vehicle-side arc portion 31 and the vehicle-side arc portion 32 can be bent parallel to the vehicle body opening peripheral edge 6, the amount of bending of the hollow seal portion 30 can be increased. Therefore, the dimension which overlaps with the hollow seal part 30 and the vehicle body opening periphery 6 can be enlarged, the assembly | attachment dispersion | variation of the door 1 becomes large, and the dispersion | variation in the clearance gap between the door frame 2 and the vehicle body opening periphery 6 is increased. Even if it becomes large, the hollow seal part 30 can contact | abut to the vehicle body opening periphery 6 reliably, and a sealing performance can be ensured.

A connecting portion between the vehicle-side arc portion 31 and the vehicle-side arc portion 32 is displaced so that the vehicle-side arc portion 31 is lower than the vehicle-side arc portion 32, and an arc portion step portion 37 is formed. For this reason, when the hollow seal portion 30 comes into contact with the vehicle body opening peripheral edge 6 when the door is closed, the portion of the arc portion step portion 37 is easily bent, and the central portion of the vehicle outer side arc portion 31 protrudes to the outside of the vehicle. Thus, it is possible to reduce the door closing force by making it difficult for the vehicle-side arc portion 31 to come into contact with the vehicle body opening periphery 6.

An arcuate part top 34 is formed so as to protrude above the arc part step part 37 at the connecting part between the car outer arc part 31 and the car inner arc part 32. For this reason, when the door is closed, the arcuate portion top 34 reliably contacts the vehicle body opening peripheral edge 6 and also contacts the vehicle body opening peripheral edge 6 in a line contact manner, thereby ensuring sealing performance.

The arc portion bottom portion 35 extends in a flat plate shape in parallel with the door frame from the lower end of the vehicle interior arc portion 32. When the door weather strip 10 is attached to the retainer 4, the bottom portion 35 of the arc portion comes into contact with the inner side of the upper surface of the door frame 2. For this reason, the hollow seal part 30 can be stably hold | maintained on the upper surface of the door frame 2, and a sealing performance can be ensured.

The arc portion connecting portion 36 extends obliquely downward in the vehicle interior direction from the vehicle inner side end of the mounting base portion 20 toward the door frame 2 and is connected to the tip of the arc portion bottom portion 35. For this reason, the hollow seal part 30 can be made into the shape protruded to the vehicle inside. Further, the arc bottom portion 35 can be brought into contact with the door frame 2 in parallel. Note that the thicknesses of the vehicle inner arc portion 32, the arc portion bottom portion 35, and the arc portion connecting portion 36, except for the vehicle inner arc portion thick portion 33, are substantially constant.

The arc portion connecting portion 36 and the arc portion bottom portion 35 are connected by being bent at an obtuse angle at an arc portion bending portion 38. For this reason, when the door is closed, it comes into contact with the vehicle body opening peripheral edge 6 and when the vehicle outer side arc portion 31 and the vehicle inner side arc portion 32 are bent, the arc portion bent portion 38 can be bent and opened. The seal part 30 is easily bent as a whole, and the door closing force can be reduced.

Further, when the hollow seal portion 30 comes into contact with the vehicle body opening peripheral edge 6 when the door is closed, as shown in FIG. A portion of the bottom portion 35 on the side of the arc portion bent portion 38 is lifted and bends away from the door frame 2, and a portion of the bottom portion 35 of the arc portion on the side of the arc portion 32 on the vehicle interior side is slidable while being in contact with the door frame 2. Therefore, the vehicle interior arc portion 32 is easily bent, and the door closing force can be reduced.

A sub-seal portion 40 that seals between the front end of the outer peripheral portion of the door 1 and the vehicle outer side of the vehicle body opening peripheral edge 6 is formed integrally with the mounting base 20 on the vehicle outer side than the hollow seal portion 30. The sub-seal portion 40 is formed in a lip shape by curving obliquely upward from the tip of the portion where the side end on the vehicle outer side of the mounting base 20 and the mounting base upper side portion 28 are connected. Since the sub seal portion 40 is formed in a lip shape, the sub seal portion 40 can be flexibly bent and does not interfere with the hollow seal portion 30 because the width is narrow.

The front end of the sub seal part 40 abuts on the front end of the vehicle body opening periphery 6 and closes the gap between the front end of the door frame 2 and the side end of the vehicle body opening periphery 6. For this reason, the sub seal part 40 and the hollow seal part 30 can perform a double seal between the door frame 2 and the vehicle body opening peripheral edge 6 and have high sealing performance. Moreover, the appearance between the door frame 2 and the vehicle body opening periphery 6 is good.

As shown in FIG. 4, the corner portion 12 of the door weather strip 10 has a straight portion 11 that forms an upper side and a straight portion 13 that forms a vertical side and a bottom side, which are connected by molding. The strip 10 is formed in an annular shape. When attached to the door frame 2, the corner portion 12 is attached to the corresponding corner portion of the door frame 2 and seals the corner portion.

  Next, a second embodiment of the present invention will be described with reference to FIG. The door weather strip 10 of the second embodiment differs from the first embodiment only in that an arc portion bottom protrusion 39 is formed on the arc portion bottom portion 35 of the mounting base 20. Since the portions are the same, the description will be focused on the description of the mounting base 20, and the description of the other portions will be omitted.

In the second embodiment, as shown in FIG. 3, the arc portion bottom portion 35 is formed with an arc portion bottom protrusion portion 39 protruding on the lower surface. For this reason, the arcuate portion bottom protrusion 39 abuts against the door frame 2 to hold the hollow seal portion 30. The arc portion bottom portion 35 is located in parallel to the door frame 2. For this reason, the circular-arc part bottom part protrusion part 39 can hold | maintain the hollow seal part 30 to the door frame 2 stably, and can ensure sealing performance. Further, when the inside arcuate portion 32 is deformed when the door is closed, when the arcuate bent portion 38 is deformed so as to open, the arcuate bottom projecting portion 39 slides on the upper surface of the door frame 2. 38 is easily deformed, the arc bottom portion 35 is easily displaced, the hollow seal portion 30 is easily bent, and the door closing force can be reduced.

Next, a method for manufacturing the door weather strip 10 will be described.
In the molding of the straight portion 11 of the door weather strip 10, a synthetic rubber, a thermoplastic elastomer, or a soft synthetic resin is used as a molding material. For example, an EPDM rubber is used for a synthetic rubber, a polyolefin-based elastomer is used for a thermoplastic elastomer, In the soft synthetic resin, soft vinyl chloride or the like is used. In order to improve flexibility, it is preferable to foam these materials and use them as sponge materials. In the case of rubber after extrusion, it is vulcanized and cut to a predetermined length to produce an extruded part.

When the entire door weather strip 10 is formed of a sponge material, it is formed by ordinary extrusion molding. When the attachment base portion 20 is formed of a solid material and the sub seal portion 40 and the hollow seal portion 30 are formed of a sponge material, the solid material and the sponge material are simultaneously and integrally extruded by two-color extrusion molding.
Next, the extruded member produced as described above is cut into a predetermined size, and is sandwiched between molds to mold the corner portion 12. When the cross-sectional shape of the molded portion is different, the cross-sectional shape of the molded portion is gradually changed from one cross-section to the other so that different cross-sections can be connected.

It is sectional drawing of the door weather strip which is the 1st Embodiment of this invention. It is sectional drawing at the time of the door closing of the door weather strip which is the 1st Embodiment of this invention. It is sectional drawing of the door weather strip which is the 2nd Embodiment of this invention. It is a front view which shows the whole shape of the door weather strip of this invention. It is a side view of a motor vehicle door. It is sectional drawing of the conventional door weather strip. It is sectional drawing of the other conventional door weather strip.

Explanation of symbols

2 Door frame 6 Car body opening peripheral edge 10 Door weather strip 20 Mounting base 30 Hollow seal part 31 Car outer arc part 32 Car inner arc part 33 Car inner arc part thick part 34 Arc part top part 35 Arc part bottom part 36 Arc part connection Part 37 Arc part step part 38 Arc part bending part

Claims (7)

In the door weather strip that seals between the door of the automobile and the periphery of the opening of the vehicle body, and is attached to the upper side of the outer periphery of the door frame of the door,
The door weather strip attached to the upper side of the door includes an attachment base attached to a retainer provided on an outer peripheral portion of the door frame, and an abutment formed on the attachment base and in contact with the periphery of the vehicle body opening. A seal portion for sealing between the door and the periphery of the vehicle body opening;
The seal portion has a hollow seal portion that contacts the periphery of the opening of the vehicle body. The hollow seal portion is formed to protrude in the vehicle interior direction and extends obliquely upward in the vehicle interior direction from the upper surface of the mounting base portion. An arcuate vehicle outer side, an arc connecting part extending obliquely downward from the vehicle inner side end of the mounting base toward the door frame, and the door frame extending inward from the tip of the arc connecting part Formed in an annular shape from an arc portion bottom portion extending in parallel with the inner arc portion and a vehicle inner arc portion connected to the tip end of the vehicle outer arc portion in an arc shape from the tip end of the arc portion bottom,
The connecting portion between the vehicle inner arc portion and the vehicle outer arc portion is formed with an arc portion step portion so that the vehicle outer arc portion is lower than the vehicle inner arc portion, and above the arc portion step portion. The top of the arc part protruding to
The vehicle interior arc portion has a vehicle interior arc portion thick portion formed thicker than other hollow seal portions in the vehicle interior direction from the arc portion top,
The door weather strip, wherein the arc portion connecting portion and the arc portion bottom portion are bent and connected at an arc portion bent portion. The door weather strip according to claim 1, wherein the bottom of the arc portion is in contact with the door frame. 2. The door weather strip according to claim 1, wherein the arc part bottom part is formed with an arc part bottom part projecting part projecting to a lower surface, and the arc part bottom part projecting part comes into contact with the door frame. The hollow seal portion according to any one of claims 1 to 3, wherein a central portion of the outer arcuate portion protrudes toward the vehicle outer side and is bent so that the hollow seal portion does not contact the periphery of the vehicle body opening when the door is closed. Door weather strip. The hollow seal portion bends so that the arc portion bend portion is opened when the door is closed, and the arc portion bottom portion is in contact with the door frame at the vicinity of the continuous portion with the vehicle inner arc portion, and the arc portion bend portion is The door weather strip according to any one of claims 1 to 4, wherein a near portion bends away from the door frame. The seal portion includes a sub seal portion that seals between a front end of an outer peripheral portion of the door and a vehicle outer side end of the periphery of the vehicle body opening, and a periphery of the vehicle body opening portion that is closer to the vehicle inner side than a portion where the sub seal portion abuts. The door weather strip according to any one of claims 1 to 5, wherein the door weather strip is formed from the hollow seal portion that abuts against the door. The door weather strip according to any one of claims 1 to 6, wherein a part of the mounting base is formed of a solid material and the other part is formed of a sponge material.

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