JP4577339B2 - Door weather strip - Google Patents

Description

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

  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 formed of, for example, EPDM (ethylene-propylene-diene copolymer) rubber and the like, and includes a base portion that is fixed to the periphery of the door and a hollow seal portion that is integrally formed with the base portion. Yes. When the door is closed, the seal portion is brought into contact with or pressed against the periphery of the door opening of the body, thereby sealing between the door and the body. This prevents rainwater or the like from entering the vehicle.

  In recent years, a door seal structure in which a retainer for attaching a weather strip or the like is omitted from the periphery of the door has been seen in order to reduce the weight and cost. In this case, the door weather strip is fixed to the door periphery by a fixing means such as a clip.

  However, it is difficult to ensure sufficient sealing performance to prevent intrusion of rainwater or the like from between the base portion of the door weather strip and the door panel only with clips that are intermittently attached at predetermined intervals. For this reason, in a door upper side part etc., the sealing performance is improved by using together with the double-sided adhesive tape stuck continuously in a longitudinal direction, and the said clip.

In order to further reduce the cost, a technique that omits the relatively expensive double-sided adhesive tape has also been proposed. For example, there is one in which a highly foamed sponge member is provided on the back of the base portion of the door weather strip (see, for example, Patent Document 1).
JP 2001-63382 A

  However, the highly foamed sponge member is easily plastically deformed, and it is difficult to ensure a stable sealing property over a long period of time. In addition, a sufficient seal pressure cannot be applied to the door panel. There is a risk of water leakage. In particular, in door panels formed by welding panel members with different thicknesses, a step is easily formed at the joint between the two, so a high foam sponge member that cannot obtain sufficient sealing pressure cannot absorb this step. There is a possibility that a gap is generated and the sealing performance is lowered.

  This invention is made | formed in view of the said situation, The objective is to provide the door weather strip which can aim at the improvement of a sealing performance.

  In the following, each means suitable for solving the above problem will be described in terms of items. In addition, the effect etc. peculiar to a corresponding means are added as needed.

Means 1. A door weather strip that is attached to the periphery of the door of the vehicle and seals between the periphery of the door opening and the door,
In at least a part of the upper side portion disposed along the upper edge portion of the door,
A mounting base fixed by fixing means to a mounting surface formed on the door panel;
A hollow first seal portion pressed against the periphery of the door opening when the door is closed;
A tongue-shaped second seal portion pressed against the periphery of the door opening on the vehicle outer side than the pressure contact position of the first seal portion;
A tongue-like third seal portion pressed against the side wall surface of the door panel formed on the vehicle exterior side of the mounting surface so as to intersect the mounting surface;
A tongue that protrudes from the side wall portion of the mounting base portion that faces the side wall surface of the door panel, and that is pressed against the side wall surface of the door panel closer to the mounting surface side than the press contact position of the third seal portion. A piece-like fourth seal portion;
A protruding fifth seal portion that protrudes from the base portion of the mounting base portion that faces the mounting surface of the door panel and is pressed against the mounting surface at a position outside the vehicle relative to the fixing means; With
At least the thickness of the connecting part between the fifth seal part and the base part of the base part is thinner than the thickness of the base part of the base part ,
The door weather strip, wherein the fifth seal portion is formed in a V-shaped cross section .

  According to the means 1, at the upper edge portion of the door, the first and second seal portions are pressed against the periphery of the door opening, and the third to fifth seal portions are pressed against the door panel, so that the door and the door opening are opened. The space between the edges is sealed to prevent rainwater and the like from entering the vehicle.

  As for the space between the door weather strip and the door panel, even if rainwater or the like enters from the gap between the third seal portion and the door panel, the fourth seal portion prevents further penetration of rainwater or the like into the vehicle interior. . In this means, since the fifth seal portion is further provided, the sealing performance is further improved.

  As a result, even when the door weather trip is fixed only by a fixing means such as a clip that is intermittently attached at predetermined intervals without using a relatively expensive double-sided adhesive tape, the door weather strip and the door panel are fixed. It is possible to secure a sufficient sealing property to prevent rainwater and the like from entering between. As a result, by omitting the double-sided adhesive tape, it is possible to simplify the manufacturing process, shorten the processing time, and suppress the increase in manufacturing cost.

  In addition, the protrusion-like fifth seal portion has a thin base portion, and is easily elastically deformed compared with a configuration in which a lump-like protrusion portion is formed protruding from the base body, and has a followability to the door panel. Good. As a result, for example, a step in a welded portion formed on the door panel can be absorbed, and the sealing performance can be further improved.

Further, the fourth seal portion is formed so as to protrude from the side wall portion of the mounting base portion. For this reason, compared with the case where it forms in the middle of the tongue-shaped seal part extended from the attachment base, for example, it is hard to receive the influence at the time of the press deformation of a 1st, 2nd seal part. As a result, it is possible to suppress inconveniences such as pressure contact in a state where the distal end portion is bent, variation in the pressure contact position, and the like, and partial seal breakage is less likely to occur.
Furthermore, the fifth seal portion is formed in a V-shaped cross section. Therefore, it becomes easy to be crushed and deformed, and the followability is improved, so that the sealing performance can be further improved. Moreover, since the tip is tapered, it can be efficiently pressed against the door panel in a line contact state. Thereby, compared with the seal part press-contacted in a surface contact state, the further improvement of a sealing performance can be aimed at.
In addition, unlike a tongue-shaped seal portion, there is no possibility of abutting the door panel in a state where the tip portion is bent at the time of mounting, so that partial seal breakage or the like hardly occurs.

  Mean 2. The door weather strip according to means 1, wherein the fifth seal portion is provided at the widthwise vehicle outer side end portion of the base portion or in the vicinity thereof.

  The width direction vehicle outer side end portion in the vicinity of the connecting portion between the base portion of the mounting base portion and the vehicle outer side wall portion or the vicinity thereof is closer to the first and second seal portions than the vicinity of the center portion in the width direction of the base portion. It is easy to apply a load during pressure welding deformation. For this reason, by setting it as the said means 2, the desired sealing pressure can be ensured more reliably at the time of a door closing, and the further improvement of a sealing performance can be aimed at.

Means 3 . The door weather strip according to means 1 or 2 , wherein at least the attachment base and the fifth seal part are integrally formed of a sponge elastic material.

According to the above-mentioned means 3 , a very troublesome process of attaching the sponge member separately as the fifth seal portion or performing two-color coextrusion molding of the attachment base portion and the fifth seal portion with the solid elastic material and the sponge elastic material. This is not necessary and simplifies the manufacturing process and suppresses an increase in manufacturing cost.

  Hereinafter, an embodiment of a door weather strip attached to the periphery of a door of an automobile as a vehicle will be described with reference to the drawings.

  As shown in FIGS. 1 and 2, a door 3 is provided at the door opening 2 of the automobile 1 so as to be openable and closable, and a door weather strip 4 is attached to the periphery of the door 3. In addition, the door 3 is comprised by the inner panel 5 and the outer panel 6 as a panel member (refer FIG. 4). Therefore, the panels 5 and 6 constitute the door panel in this embodiment.

  Among these, the inner panel 5 is formed by welding panel members having different thicknesses on the hinge side (left side in FIG. 2) and the open side (right side in FIG. 2). This is because a thick panel member is used on the hinge side to ensure rigidity on the hinge side. Therefore, the welded portion 5 a is exposed at the upper edge portion 3 a of the door 3 on the inner panel 5.

  As shown in FIG. 3, the door weather strip 4 is formed in an annular shape by EPDM (ethylene-propylene-diene copolymer) sponge rubber as a sponge elastic material (rubber material) along the periphery of the door 3. . In addition, as EPDM sponge rubber of this embodiment, the thing with a specific gravity of 0.4-0.7 is employ | adopted.

  The door weather strip 4 includes extrusion-molded portions 7 and 8 and mold-molded portions (portions with a dotted pattern) 9 and 10. The extrusion molding parts 7 and 8 are formed substantially linearly (in a long shape) by an extrusion molding machine (not shown). Moreover, the mold forming parts 9 and 10 are formed by a predetermined mold apparatus so as to connect the end edges of the adjacent extrusion forming parts 7 and 8.

  As shown in FIG. 4, which is a cross-sectional view taken along the line JJ of FIG. 3, the door weather strip 4 according to the present embodiment is attached to the door 3 having a structure in which a fitting portion such as a retainer is not provided on the peripheral edge of the door. And is fixed to a mounting surface 5b formed on the inner panel 5 by a clip 13 as a fixing means.

  Furthermore, in the door weather strip 4, in the extrusion molding portion 7 mainly constituting the upper side portion disposed along the upper edge portion 3 a of the door 3, it is possible to enter rainwater or the like without using a double-sided adhesive tape. It has the structure which can ensure sufficient sealing performance for preventing.

  Here, the extruded portion 7 will be described in detail based on the characteristic portion. The extrusion molding portion 7 includes an attachment base portion 15 fixed to the attachment surface 5b of the inner panel 5, and a hollow main seal portion 16 having a hollow portion therein and pressed against the periphery of the door opening 2 when the door 3 is closed. I have. The main seal portion 16 corresponds to the first seal portion in the present embodiment.

  The mounting base portion 15 includes a base portion 17 disposed along the mounting surface 5 b of the inner panel 5, and a vehicle inner side wall portion 18 and a vehicle outer side wall portion 19 that are formed to project from the base portion 17. . The main seal portion 16 extends from the distal ends of the side wall portions 18 and 19, and a bridge portion 20 that partitions the hollow portion in the main seal portion 16 extends.

  In the base portion 17, clip attachment holes 22 are formed at predetermined intervals along the longitudinal direction of the extruded portion 7, and the clip member 13 is attached via the clip attachment holes 22.

  Further, a sub seal lip 25 extends from the vehicle outer side wall portion 19 of the mounting base portion 15 toward the vehicle outer side. The sub seal lip 25 is pressed against the periphery of the door opening 2 on the vehicle outer side than the press contact position of the main seal portion 16. The sub seal lip 25 corresponds to the second seal portion in the present embodiment.

  Further, a rear lip 26 is formed so as to extend from the substantially central portion in the extending direction of the sub seal lip 25 toward the vehicle outer side. The rear lip 26 is pressed against a flange portion 27 constituted by the inner panel 5 and the outer panel 6. The flange portion 27 is bent so that the outer edge of the inner panel 5 intersects the mounting surface 5b, and the outer panel 6 is overlaid on the outer side of the portion, and the edge is folded and hemmed. By doing so, it is integrally formed. Therefore, the vehicle interior side surface 27a of the flange portion 27 corresponds to the side wall surface of the door panel in the present embodiment, and the rear lip 26 corresponds to the third seal portion in the present embodiment.

  A drainage lip 30 is formed on the vehicle outer side wall portion 19 of the mounting base portion 15 so as to extend toward the vehicle outer side in the vicinity of the connecting portion with the base portion 17. The drainage lip 30 is in pressure contact with the flange portion 27 on the mounting surface 5 b side of the inner panel 5 with respect to the pressure contact position of the back surface lip 26. The drainage lip 30 corresponds to the fourth seal portion in the present embodiment.

  Further, the base portion 17 of the mounting base portion 15 is formed with a water stop rib 33 protruding at its width direction vehicle outer side end portion, that is, a connecting portion with the vehicle outer side wall portion 19. The water stop rib 33 is pressed against the mounting surface 5 b of the inner panel 5. The water stop rib 33 corresponds to the fifth seal portion in the present embodiment.

  As shown in FIG. 5, the water blocking rib 33 has a V-shaped cross section that is convex toward the outside of the base portion 17, and the thickness t <b> 1 of the vehicle interior connection portion and the thickness t <b> 2 of the vehicle exterior connection portion are both. It is thinner than the thickness t3 of the base 17 main body.

  Although not shown in the drawing, the extruded portion 8 has a slightly different cross-sectional shape from the extruded portion 7 and includes a mounting base portion 15 and a main seal portion 16, but the sub seal lip 25, the back lip 26, and the drain lip. 30 and the water stop rib 33 etc. are not provided. This is because rainwater or the like flows downward at the vertical edge portion of the door 3 and the like, so that there is little possibility of entering the vehicle interior.

  In addition, with respect to the molding parts 9 and 10 that connect the extrusion molding parts 7 and 8, the sub seal lip 25 and the rear lip are provided at a portion disposed on the upper edge 3 a of the door 3 continuously to the extrusion molding part 7. 26. However, the drainage lip 30 and the water stop rib 33 are not provided in the mold forming parts 9 and 10 because it is sufficient if the drainage lip 30 and the water stopping rib 33 are provided in the extrusion molding part 7. Of course, if the drainage lip 30 and the water stop ribs 33 are provided in the molded portions 9 and 10, the sealing performance can be further improved.

  As described above in detail, when the door 3 is closed, the main seal portion 16 and the sub seal lip 25 are pressed against the periphery of the door opening 2 and the rear lip 26 at the upper edge portion 3a (extruded portion 7) of the door 3. The drainage lip 30 and the water stop rib 33 are pressed against the door 3 to seal the periphery of the door opening 2 and the door 3, thereby preventing rainwater and the like from entering the vehicle.

  Regarding the space between the door weather strip 4 and the door 3, even if rainwater or the like enters from the gap between the back lip 26 and the flange 27, the drainage lip 30 prevents further penetration of rainwater or the like into the vehicle interior. Is done. In this embodiment, since the water stop rib 33 is further provided, the sealing performance is further improved.

  As a result, even when the door weather trip 4 is fixed only by the clip 13 that is intermittently attached at predetermined intervals without using a relatively expensive double-sided adhesive tape, the door weather strip 4 and the door 3 are fixed. It is possible to secure a sufficient sealing property to prevent rainwater and the like from entering between. As a result, by omitting the double-sided adhesive tape, it is possible to simplify the manufacturing process, shorten the processing time, and suppress the increase in manufacturing cost.

  The water blocking rib 33 of the present embodiment is thinner than the thickness t3 of the base portion 17 body, and is more easily elastically deformed than the configuration in which a lump-shaped protrusion is formed protruding from the base portion 17 body, Good followability to panel 5. As a result, for example, a step in the welded portion 5a formed on the inner panel 5 can be absorbed, and the sealing performance can be further improved.

  Furthermore, the water stop rib 33 is formed in a V-shaped cross section. Therefore, it becomes easy to be crushed and deformed, and the followability is improved, so that the sealing performance can be further improved. Further, since the tip is tapered, the inner panel 5 can be efficiently press-contacted in a line contact state. Thereby, compared with the seal part press-contacted in a surface contact state, the further improvement of a sealing performance can be aimed at. Further, unlike the tongue-shaped seal portion, there is no possibility that the tip end portion is bent at the time of attachment and the inner panel 5 is not contacted.

  Further, since the drainage lip 30 is formed so as to protrude from the vehicle outer side wall portion 19 of the mounting base portion 15, for example, compared with a case where the drainage lip 30 is formed in the middle of the sub seal lip 25, the main seal portion 16 and the sub seal lip 25. Less susceptible to pressure deformation. As a result, it is possible to suppress inconveniences such as pressure contact in a state where the distal end portion is bent, variation in the pressure contact position, and the like, and partial seal breakage is less likely to occur.

  Further, the door weather strip 4 is entirely formed of EPDM sponge rubber including the mounting base 15 and the water stop ribs 33. For this reason, it does not require a very troublesome process such as separately attaching the sponge member as a water-stopping rib, or performing two-color coextrusion molding of the mounting base 15 and the water-stopping rib 33 with a solid elastic material and a sponge elastic material, While simplifying a manufacturing process, the increase in manufacturing cost can be suppressed.

  As can be seen from FIG. 4, the sealing form of the extrusion molding part 7 is a bending type in which the main seal part 16 is in pressure contact with the periphery of the door opening 2 in a state where the main seal part 16 tilts to the vehicle outer side when the door 3 is closed. In the case of this type, the main seal portion 16 and the width direction vehicle outer side end portion of the base portion 17 which is a connection portion with the vehicle outer side wall portion 19 of the mounting base portion 15 are compared with the vicinity of the center portion in the width direction of the base portion 17. The load at the time of the pressure contact deformation of the sub seal lip 25 is likely to be applied. For this reason, by providing the water stop rib 33 at the position as in the present embodiment, a desired sealing pressure can be more reliably ensured when the door 3 is closed, and the sealing performance can be further improved.

  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 door weather strip 4 mounted on the peripheral edge of the front door 3 is embodied. However, the present invention is applied to a door weather strip mounted on the peripheral edge of another door such as a rear door. Is also possible.

  (B) The door weather strip 4 in the above embodiment is an annular type that is attached over the entire periphery of the door 3, but may not necessarily be an annular type and includes at least the upper edge 3 a of the door 3. It may be partially attached.

  (C) In the above embodiment, EPDM rubber is adopted as the material (elastic material) of the door weather strip 4, but in addition to that, styrene butadiene rubber, butadiene rubber, chloroprene rubber, butyl rubber, nitrile rubber, ethylene propylene You may comprise various rubber materials, such as copolymer rubber and an acrylic rubber, or another elastic material which has rubber-like elasticity, such as an olefin type thermoplastic elastomer (TPO) or a soft polyvinyl chloride.

  Further, the door weather strip 4 of the above embodiment is entirely formed of EPDM sponge rubber, including the mounting base 15 and the water stop rib 33, but is not limited thereto, for example, the main seal portion 16 and the sub seal lip 25. For example, a part may be formed of a sponge elastic material. However, the water blocking rib 33 is preferably made of a sponge elastic material in order to obtain the effects described in the above embodiment.

  (D) In the above embodiment, the clip member 13 is employed as a fixing means for fixing the door weather strip 4. However, the clip member 13 is not limited to this, and is fixed intermittently or partially by a double-sided adhesive tape or adhesive. You may employ | adopt the structure to do.

  (E) In the above embodiment, the water blocking rib 33 is provided at the width direction vehicle outer side end portion of the base portion 17 of the mounting base portion 15. The position where the water stop rib 33 is provided is not limited to this, and may be at least the vehicle outer side position than the clip member 13. However, when the door 3 is closed, considering that the load is likely to be applied to the widthwise vehicle outer side end portion or the vicinity of the base portion 17 serving as a connection portion with the vehicle outer side wall portion 19 of the mounting base 15, It is preferable to be provided at the width direction vehicle outer end portion or in the vicinity thereof.

(F) In the above embodiment, the water blocking rib 33 is formed in a V-shaped cross section. For example, as shown in FIG. 6, a water stop rib 50 having a trapezoidal cross section with a flat tip may be employed (however, a reference example) . Of course, also in this case, the thickness t1 of the vehicle interior connection portion with the base portion 17 body and the thickness t2 of the vehicle exterior connection portion are both thinner than the thickness t3 of the base portion 17 body.

  (G) The sectional shape of the door weather strip 4 is not limited to the above embodiment. For example, the bridge unit 20 and the like may be omitted.

It is a perspective view which shows a motor vehicle. It is a rear view which shows a door. It is a front view which shows a door weather strip. It is the JJ sectional view taken on the line of FIG. 3 which shows a door weather strip. It is the elements on larger scale which show a water stop rib. It is the elements on larger scale which show the water stop rib in another embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Automobile, 2 ... Door opening, 3 ... Door, 4 ... Door weather strip, 5 ... Inner panel, 5b ... Mounting surface, 13 ... Clip, 15 ... Mounting base, 16 ... Main seal part, 17 ... Base part, 25 ... Sub seal lip, 26 ... Back lip, 27 ... Flange, 30 ... Drain lip, 33 ... Water stop rib.

Claims (3)

A door weather strip that is attached to the periphery of the door of the vehicle and seals between the periphery of the door opening and the door,
In at least a part of the upper side portion disposed along the upper edge portion of the door,
A mounting base fixed by fixing means to a mounting surface formed on the door panel;
A hollow first seal portion pressed against the periphery of the door opening when the door is closed;
A tongue-shaped second seal portion pressed against the periphery of the door opening on the vehicle outer side than the pressure contact position of the first seal portion;
A tongue-like third seal portion pressed against the side wall surface of the door panel formed on the vehicle exterior side of the mounting surface so as to intersect the mounting surface;
A tongue that protrudes from the side wall portion of the mounting base portion that faces the side wall surface of the door panel, and that is pressed against the side wall surface of the door panel closer to the mounting surface side than the press contact position of the third seal portion. A piece-like fourth seal portion;
A protruding fifth seal portion that protrudes from the base portion of the mounting base portion that faces the mounting surface of the door panel and is pressed against the mounting surface at a position outside the vehicle relative to the fixing means; With
At least the thickness of the connecting part between the fifth seal part and the base part of the base part is thinner than the thickness of the base part of the base part ,
The door weather strip, wherein the fifth seal portion is formed in a V-shaped cross section .   2. The door weather strip according to claim 1, wherein the fifth seal portion is provided at a width direction vehicle outer side end portion of the base portion or in the vicinity thereof. The door weather strip according to claim 1 or 2 , wherein at least the attachment base and the fifth seal portion are integrally formed of a sponge elastic material.

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