JP2002178769A - Door weather strip for automobile and attachment structure of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability of attaching a door weather strip on a door sash. SOLUTION: In a door weather strip 2 for an automobile provided with a hollow base part 16 engaging with a door sash 4 at the both side ends and a hollow seal part 18 formed as one body with the base part 16, and having the base part 16 fixed on the door sash 4, a recessed groove 34 returnably squeezed for attaching the base part 16 on the door sash 4 to narrow a width of a bottom wall 28 is formed in vicinity of side end on the inside of the vehicle on the bottom wall 28 of the base part 16 to connect to the hollow part 32 of the base part 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door weather strip for an automobile and a mounting structure thereof.

[0002]

2. Description of the Related Art An outer periphery of a door sash of an automobile door is
A door weatherstrip that seals between a vehicle body opening edge and the vehicle body opening edge is provided.

As shown in FIG. 8, a hollow base portion 44 fixed to the outer peripheral side of a door sash 42 and a base portion 44 are provided.
And a sub-lip 48 extending from the upper portion of the base portion 44 to the outer peripheral side of the door and pressing against the door opening edge. It is known, and is fixed by press-fitting the base portion 44 into a fitting portion 50 having a substantially U-shaped cross section formed on the outer peripheral side of the door sash 42.

[0004] The hook portion 52 of the fitting portion 50 is formed such that its tip is curved toward the outside of the vehicle. The stop portion 56 is formed, and the tip portion of the vehicle inner side wall 52 and the locking portion 56 are respectively engaged with the base portion 44, thereby preventing the base portion 44 press-fitted into the fitting portion 50 from coming off.

[0005]

However, in the above configuration, when the door weather strip 40 is pressed into the door sash 42, the locking portion 56 and the tip of the curved hook portion 52 are connected to the base portion. 44 interferes with both side edges of the door weather strip 40.
However, there is a problem that the mounting work on the door sash 42 cannot be performed smoothly.

The locking portion 56 and the curved hook portion 5
The workability of attaching the door weather strip to the door weather strip becomes smoother if the margin of the front end of the second part to the base part 44 is reduced, but the holding force of the fitting part 50 to the base part 44 is relatively reduced. There is a problem that the mounting strength of the door 40 to the door sash 42 is reduced.

[0007]

SUMMARY OF THE INVENTION Accordingly, the present invention is directed to a door weather strip provided on the outer peripheral side of a door of a door sash, and has a hollow shape in which both side edges are engaged with the door sash. A door weather for an automobile, comprising: a base portion; and a hollow seal portion formed integrally with the base portion and bulging toward the vehicle interior of the base portion, wherein the base portion is fixed to the door sash. In the strip, the bottom wall of the base portion is provided with a concave groove which narrows the width of the bottom wall by being crushably restored when the base portion is attached to the door sash. It is characterized in that it is formed in the vicinity so as to be continuous with the hollow part of the base part. Thereby, after engaging the side edge on the vehicle interior side of the base portion with the door sash, if the door weather strip is pushed into the door sash, the concave groove is crushed and the width of the bottom wall is reduced, The door weatherstrip can be attached to the door sash without the side edge of the base outside the vehicle interfering with the door sash.

According to a second aspect of the present invention, the door sash is mounted on a door outer peripheral surface of the door sash. A curved hook portion is formed, and a side wall substantially along a door surface is formed on a side edge of the door sash on the vehicle exterior side, and the side wall bulges toward the vehicle interior and is substantially similar to the hook portion. Opposing locking portions are formed, the door weather strip is a hollow base portion, and a hollow seal portion formed integrally with the base portion and bulging toward the vehicle interior side of the base portion,
The base portion has a vehicle inner side projection provided on an inner side edge thereof and is engageable with the hook portion. The vehicle outer side edge of the base portion is engaged with the locking portion. In a mounting structure for an automobile door weatherstrip in which a possible vehicle-side projection is provided and the base is fixed to the door sash, the base is attached to the door sash on a bottom wall of the base. A concave groove that narrows the width of the bottom wall by being crushed restorably when attached to the
It is characterized in that it is formed in the vicinity of the vehicle inner side projection so as to be continuous with the hollow part of the base part.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the door weather strip has a seal lip which comes into contact with an opening of the vehicle body when the door is closed. The base end of the seal lip is formed to be located substantially at the center of the base. As a result, the tensile stress acting on the seal lip in the door outer peripheral direction is distributed to each side edge of the base portion without acting relatively concentrated on one of the side edges of the base portion.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a sectional view showing a state in which a door weather strip 2 according to the present invention is attached to an outer peripheral side of a door sash 4, and FIG. 2 is a sectional view of a single door weather strip 2 according to the present invention. It is.

The door sash 4 is formed by bending a metal plate. The door sash 4 is formed in a substantially T-shaped cross section by the side wall 6 and the center wall on the outside of the vehicle. At the center, a hook portion 10 curved toward the outside of the vehicle is formed.

The side wall 6 bulges toward the inside of the vehicle at a position closer to the door outer periphery than the center wall 8, and
A locking portion 12 substantially facing 0 is formed.

A glass run fitting groove 14 to which a glass run (not shown) for sealing the edge of the door glass is attached is formed on the inner peripheral side of the door of the central wall 8 by using the side wall 6.

The door weather strip 2 is integrally extruded using a rubber material, and has a hollow base portion 16 made of solid rubber, a hollow seal portion 18 made of sponge rubber, and a sub-lip 20 outside the vehicle. And a vehicle interior sub lip 22 as a seal lip.

The base portion 16 has an inner side projection 24 which can be engaged with the hook portion 10 on the inner side edge of the vehicle, and a hollow seal portion 1 which seals the upper portion with the opening edge of the vehicle body.
8 are integrally connected. Also, on the outer side edge of the base portion 16, a vehicle-side protrusion 2 that can be engaged with the locking portion 12 is provided.
6 are provided. That is, the vehicle-inside protrusion 24 and the vehicle-side protrusion 26 are respectively provided at the vehicle-inside end and the vehicle-outside end of the bottom wall 28 of the base 16 substantially along the center wall 8 of the door sash 4.

The vehicle interior sub lip 22 is formed so as to extend obliquely from the vehicle interior edge above the base portion 16 toward the exterior of the door toward the exterior of the door, and is located outside the hollow seal portion 18 outside the vehicle. I have. The vehicle exterior sub-lip 20 is formed to extend obliquely from the vehicle exterior edge above the base portion 16 toward the vehicle interior in the door outer peripheral direction. Further, the outside sub-lip 20 is formed relatively smaller than the inside sub-lip 22, and when the door is closed, the inside sub-lip 22 is formed with the molding portion 30 of the vehicle body opening.
, And falls down to the outside of the vehicle, and the outside sub-lip 20 contacts the inside sub-lip 22 and falls down to the inside of the vehicle. Then, the vehicle exterior sub-lip 20 and the vehicle interior sub-lip 22
Door sash 4 and molding section 3
The gap volume with zero is small, and the water flowing along this portion is reduced, so that the noise does not occur due to the flowing water.

A groove 34 is formed in the bottom wall 28 of the base 16 so as to be continuous with the hollow portion 32 of the base 16. The concave groove 34 is located in the vicinity of the vehicle interior protrusion 24, that is, in the vicinity of the vehicle interior end of the bottom wall 28, and opens at a position below the hollow portion 32 on the vehicle interior. Further, as shown in FIG. 2, groove 34 in the width direction of the bottom wall 28, i.e. the width L ₁ along the horizontal direction in FIG. 2, takes for engagement portion 12 of the exterior protrusion 26 generations L ₂ It is set to be longer than

FIGS. 3 to 5 are explanatory views showing an attaching process when the above-mentioned door weather strip 2 is attached to the door sash 4.

First, as shown in FIG. 3, the vehicle-side projection 24 of the base 16 is engaged with the hook 10 of the center wall 8.

Then, press the sub lip 22 inside the vehicle,
When the worker pushes the door weather strip 2 into the door sash 4 from above the vehicle outside the base portion 16 in the direction of arrow A in FIG. 3, the concave groove 34 is crushed, and the width of the bottom wall 28 is reduced. The vehicle outside projection 26 enters below the locking portion 12 without interfering with the locking portion 12 provided on the side wall 6 (FIG. 4).

This is because the width L _{1 of} the concave groove and the outer protrusion 26
And algebraic L ₂ takes for engagement portion 12 of is because they satisfy the relation of equation (1) as described above.

[0023]

L ₁ ≧ L ₂ (1) At this time, the portion of the bottom wall 28 outside the concave groove 34 moves to the inside of the vehicle while keeping its width W substantially constant. .

When the force applied in the direction of arrow A is removed from the state shown in FIG. 4, the crushed concave groove 34 is restored as shown in FIG. Part 1
2 and the door weather strip 2 is fixed to the door sash 4. At this time, the concave groove 34 of the bottom wall 28
The part that is further outside moves to the outside with the width W kept substantially constant.

That is, through the above-described series of mounting steps, the width dimension W of the portion of the bottom wall 28 including the vehicle-side projecting portion 26 outside the concave groove 34 is maintained at a substantially constant length.

In the door weather strip 2 configured as described above, a concave portion is formed in the bottom wall 28 of the base portion 16 near the inner end of the bottom wall 28 and opened at a position below the hollow portion 32 inside the vehicle. Since the groove 34 is formed, when the door weather strip 2 is attached, when the door weather strip 2 is pushed into the door sash 4 obliquely from above the outside of the base portion 16 to below the inside of the base portion 16, The groove 34 is easily crushed with a relatively small force.

When the concave groove 34 is crushed, the entire width of the bottom wall 28 of the base portion 16 is reduced, and the outer projection 26 does not interfere with the locking portion 12 at the time of mounting work. Thus, the workability of attaching the door weather strip 2 to the door sash 4 can be greatly improved. Further, after the mounting operation, the crushed concave groove 34 is restored, so that the vehicle-side projection 26 is engaged with the locking portion 12, and the mounting strength of the door weather strip 2 to the door sash 4 may be reduced. Absent.

Next, a second embodiment of the present invention will be described with reference to FIG. In addition, about the structure which overlaps with 1st Example mentioned above, the same code | symbol as 1st Example is attached and description is abbreviate | omitted.

In the second embodiment, the base end 38a of the vehicle interior sub lip 38 is formed so as to be located substantially at the center of the base portion 16.

The bottom surface 28a of the bottom wall 28 facing the center wall 8 is formed so as to project upward in FIG. 6 on a cross section orthogonal to the longitudinal direction of the door weather strip 36, that is, on the cross section shown in FIG. It is formed in a substantially arc shape, and the gap between the center wall 8 and the bottom surface 28a is maximum at substantially the center of the bottom surface, and the maximum value t is set to about 1 mm.

Here, the vehicle interior sub-lip 38 in the second embodiment will be described in detail. In FIG. 6, a straight line passing through the center in the width direction of the bottom wall 28 including the vehicle-side protrusion 24 and the vehicle-side protrusion 26 and orthogonal to the width direction of the bottom wall 28 is vertically bisected by the bottom wall 28. Assuming the line S, the base end 38a of the vehicle interior sub lip 38 is
Are formed in the vicinity of the vertical bisector S over the entire length in the longitudinal direction.

In other words, the center M of the base end 38a located at the terminal on the base end 38a side of the cross-sectional center line T of the vehicle interior sub-lip 38 in FIG. 6 is located near the vertical bisector S. The vehicle interior sub lip 38 is formed.

When the door weather strip 36 of the second embodiment having the above-described structure is engaged and fixed to the door sash 4, as shown in FIG. When pulled in the direction of the arrow, the vehicle-side protrusion 24 and the vehicle-side protrusion 26 become
They are pulled in the directions indicated by arrows C and D, respectively.

When the stress caused by the tensile stress F acting on the inner side sub lip 38 in the door outer peripheral direction acts on one of the inner side projection 24 and the outer side projection 26 relatively largely, the relative bias is generated. The bottom wall 28 rotates toward the outer periphery of the door with the projection on the side on which a small stress is applied as a fulcrum, and the projection on the side on which a relatively large tensile stress is applied falls off the locking portion of the door sash 4. Easier to do.

However, in the second embodiment, since the center M of the base end 38a of the vehicle interior sub-lip 38 is located on the vertical bisector S of the bottom wall 28, it acts on the vehicle interior sub-lip 38. The stress generated on both side edges of the base portion 16 due to the tensile stress F
It is distributed to both the inside projection 24 and the outside projection 26 without acting relatively to one of the outside projections 26 and the outside projection 26.

Accordingly, the engagement and holding force of the door weather strip 36 with respect to the door sash 4 can be relatively improved, and the workability of attaching the door weather strip 36 to the door sash 4 can be improved while the door weather strip 36 can be mounted. From the door sash 4 can be reliably prevented.

[0037]

According to the present invention, when the door weather strip is pushed into the door sash after the inner side edge of the base portion is engaged with the door sash, the concave groove is crushed and the base portion is crushed. The door weatherstrip is attached to the door sash without the side edges on the outside of the vehicle interfering with the door sash, so the workability of attaching the door weatherstrip to the door sash without reducing the mounting strength of the door weatherstrip to the door sash Can be dramatically improved.

According to the third aspect of the present invention, the tensile stress in the door outer peripheral direction acting on the seal lip does not act relatively concentrated on one of the side edges of the base portion, but acts on each side edge of the base portion. As a result, the engagement and holding force of the door weather strip with respect to the door sash can be relatively improved, and the door weather strip can be reliably prevented from falling off the door sash.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part showing a mounting structure of a door weather strip according to the present invention.

FIG. 2 is a cross-sectional view of the door weather strip according to the present invention.

FIG. 3 is an explanatory view when the door weather strip according to the present invention is attached to a door sash.

FIG. 4 is an explanatory view when the door weather strip according to the present invention is attached to a door sash.

FIG. 5 is an explanatory view when the door weather strip according to the present invention is attached to the door sash.

FIG. 6 is a sectional view of a door weather strip according to a second embodiment of the present invention.

FIG. 7 is an explanatory view showing a state in which a tensile force acts on a vehicle inner side sub lip in a door outer peripheral direction in the second embodiment.

FIG. 8 is a sectional view of a conventional door weather strip.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 2 ... Door weather strip 4 ... Door sash 10 ... Hook part 12 ... Locking part 16 ... Base part 24 ... Car inside protrusion part 26 ... Car outside protrusion part 28 ... Bottom wall 32 ... Hollow part 34 ... Concave groove

Claims (3)

[Claims] 1. A door weatherstrip disposed on an outer peripheral side of a door of a door sash, wherein a hollow base portion having both side edges engaged with the door sash is formed integrally with the base portion. A hollow seal portion swelling toward the inside of the vehicle, wherein the base portion is fixed to the door sash, and the bottom wall of the base portion includes the base portion. A concave groove that narrows the width of the bottom wall by being crushably restored when the door sash is attached to the door sash is formed near the vehicle inner end of the bottom wall so as to be continuous with the hollow portion of the base portion. An automotive door weatherstrip, characterized in that: 2. The door sash according to claim 2, wherein the door sash has a hook portion curved toward the outside of the vehicle on a door outer peripheral surface of the door sash. A side wall substantially along the door surface is formed on a side edge of the door sash on the outside of the vehicle, and a locking portion bulging toward the inside of the vehicle and substantially facing the hook portion is formed on the side wall. The door weather strip includes a hollow base portion, and a hollow seal portion formed integrally with the base portion and bulging toward the vehicle interior of the base portion. On the side edge of the vehicle, an inside projection that can be engaged with the hook portion is provided, and on the outside edge of the base portion, an outside projection that can be engaged with the locking portion is provided. And the base part is In a mounting structure for an automobile door weather strip fixed to a sash, the bottom wall of the base portion is slidably and crushably restored when the base portion is mounted on the door sash. A groove for reducing the width of the base is formed in the vicinity of the vehicle-inside protruding portion so as to be continuous with the hollow portion of the base portion. 3. The door weather strip has a seal lip that contacts an opening of the vehicle body when the door is closed, and the seal lip is formed such that a base end of the seal lip is located substantially at the center of the base portion. The vehicle door weather strip or the vehicle door weather strip mounting structure according to claim 1 or 2, wherein the vehicle door weather strip is mounted on the vehicle.