JP6280855B2 - Door weather strip - Google Patents

Description

  The present invention relates to a door weather strip technology, and more specifically, includes a base portion attached to a base surface of a door panel, and a hollow seal portion and a seal lip portion that seal between the door panel and the body panel. The door weather strip.

  Conventionally, a structure of a door weather strip that is attached to a door panel of an automobile and seals between the door panel and the body panel is known. Specifically, a base portion that is attached to a base surface of the door panel, and an opening end of the body panel A hollow seal portion elastically contacted with the edge, a body side seal lip portion elastically contacted with the opening edge of the body panel outside the hollow seal portion, and a door side seal elastically contacted with the outer peripheral protruding edge of the door panel It consists of a lip part and the like.

  In this type of door weather strip, the body panel side is sealed by the hollow seal portion and the body side seal lip portion, and the door panel side is sealed by the door side seal lip portion and the base portion, so that the door panel and the body panel are sealed. It is configured to prevent water from entering the car. In particular, in the type that is fixed to the base surface of the door panel using a clip, it is high between the door panel (the base surface) and the base portion in order to reliably prevent water intrusion (under water) on the door panel side. Water-tightness (sealability) is required.

  From this point of view, as conventional door weather strips, for example, in Patent Document 1 and Patent Document 2, a stepped portion is formed at the lower end of the base portion outside the vehicle, and the stepped portion is elastically contacted with the base surface of the door panel. A configuration in which a low specific gravity sponge material for water stoppage is disposed is disclosed. By forming the stepped portion in this way, a thick sponge material can be disposed on the stepped portion, and the elasticity of the sponge material is made good, and the door closing property (door with less force) with an appropriate reaction force The water stoppage between the door panel and the base portion is improved while ensuring the performance capable of closing the door.

  Certainly, in the configuration of the conventional door weather strip disclosed in Patent Document 1 and Patent Document 2 described above, the amount of shrinkage elastic deformation of the sponge material is increased by disposing a sufficiently large sponge material. Therefore, in the type that is fixed to the base surface of the door panel using a clip, the sponge material is contracted and elastically deformed almost uniformly over the entire length to prevent undulation and improve the water stoppage between the door panel and the base part Can be expected.

  However, the door weather strip usually has an extruded part formed by extrusion molding and a molded part molded by mold forming, and is disclosed in Patent Document 1 and Patent Document 2 described above. In the structure of the door weather strip, since the sponge material cannot be integrally formed at the time of molding the molded part, the sponge material may not be disposed in the molded part, and a separate supplement is not provided in the molded part. Even when the material (sponge material) is stretched, the end of the sponge material in the extrusion part is gradually changed during molding, so in any case the seal line on the door panel side is molded with the extrusion part. There was a problem that the water stoppage at the ends of the molded part and the extrusion part was inferior.

JP 2000-185560 A JP 2001-63382 A

  Therefore, the present invention relates to a door weather strip that solves the above-described conventional problems, and a door weather strip that has improved water-stop performance while forming a continuous seal line on the door panel side to ensure door closing performance. The purpose is to provide.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

That is, in the door weather strip comprising the base portion attached to the base surface of the door panel, and the hollow seal portion and the seal lip portion for sealing between the door panel and the body panel, the base portion is provided. A base lip portion extending in a diagonally downward direction toward the vehicle outer side at a lower end portion of the vehicle outer side, elastically contacting the base surface of the door panel, a vehicle outer side wall on which the seal lip portion is formed, and the base lip portion A groove portion formed in a parting portion between the groove portion and a base portion of the base lip portion so as to close the groove portion, and is filled from the root portion to the tip portion. And a flexible part formed of an elastic material having a specific gravity lower than that of other parts.

In the present invention, the flexible portion is formed of a sponge material having a specific gravity of 0.15 to 0.4.

According to a third aspect of the present invention, a second flexible portion is provided between the seal lip portion and the base lip portion so as to extend outward from the vehicle and elastically contact the door panel.

  As an effect of the present invention, water sealing can be improved while forming a continuous seal line on the door panel side to ensure door closing performance.

It is a side view which shows the motor vehicle with which the door weather strip of this invention was attached. It is the sectional view on the AA line of FIG. 1 of the door weather strip which concerns on one Example of this invention. It is the sectional view on the AA line of FIG. 1 of the door weather strip of another Example. It is the sectional view on the AA line of FIG. 1 of the door weather strip of another Example.

  Next, modes for carrying out the invention will be described. 2 to 4 are cross-sectional views of the door weather strip 2 and show a state before elastically deforming by elastic contact with the door panel 10 and the body panel 11. Further, the door weather strip 2 of the present embodiment has an extrusion molded portion molded by extrusion molding and a mold molded portion molded by mold molding. However, in the following embodiments, special mention is made. As an example, the configuration of the extrusion molding unit is described.

  As shown in FIGS. 1 and 2, the door weather strip 2 of this embodiment is configured as a door weather strip that is attached to the door panel 10 of the automobile 1 and seals between the door panel 10 and the body panel 11. Specifically, the base portion 20, the hollow seal portion 21, the body side seal lip portion 22, the door side seal lip portions 23 and 24, the base lip portion 25, the concave groove portion 26, the flexible portion 27, and the like. It comprises.

  The base portion 20 is formed so as to have the same thickness at the same portion, and is attached to the base surface 10a of the door panel 10 via a plurality of clips 3. A projecting portion 20a projecting downward from the bottom surface of the base portion 20 is integrally formed at the lower end portion on the vehicle interior side of the base portion 20, and the door weather strip 2 is attached to the door panel 10 while being attached to the base surface 10a. The protrusion 20a is pressure contacted.

  Hereinafter, the vehicle inner side (left side in FIG. 2) from the axial center of the clip 3 which is a vertical axis with respect to the base surface 10a of the door panel 10 is the vehicle inner side of the door weather strip 2, and the vehicle outer side from the axial center of the clip 3 (right side in FIG. 2). Is called the outside of the door weather strip 2.

  The hollow seal portion 21 is formed as a main seal member having an annular cross section, and is integrally formed with the base portion 20 on the vehicle interior side. The hollow seal portion 21 is elastically contacted with the opening edge 11a of the body panel 11 when the door is closed, so that a continuous seal line is formed on the body panel 11 side. Further, a substantially triangular hollow portion 28 partitioned by an intermediate wall is formed between the base portion 20 and the hollow seal portion 21, and a door-side seal lip portion 23, which will be described later, is formed on the vehicle outer side wall 29 of the hollow portion 28. -24 is integrally molded.

  The body-side seal lip portion 22 is formed as a seal member having a tongue-like cross section, and protrudes outward from the hollow seal portion 21 so as to be integrally formed with the base portion 20. The body side seal lip portion 22 is elastically contacted with the opening end edge 11a of the body panel 11 when the door is closed, and the back surface portion is pressed against the opening end edge 11a and is bent into a substantially U-shaped cross section. A continuous seal line is formed on the side. However, as a whole of the door weather strip 2, the body side seal lip portion 22 is gradually changed at the mold forming portion, and the seal line by the body side seal lip portion 22 is interrupted at the mold forming portion.

  The door-side seal lip portions 23 and 24 are formed as tongue-like seal members in cross section, and extend from the above-described vehicle outer side wall 29 extending from the base portion 20 to the vehicle outer side in the vertical position, respectively. And is integrally molded. The door-side seal lip portions 23 and 24 are elastically contacted with the outer peripheral projecting edge 10b extending substantially perpendicular to the base surface 10a when the door weatherstrip 2 is attached to the door panel 10 and when the door is closed. A continuous seal line is formed. However, as a whole of the door weather strip 2, the door-side seal lip portion 23 may be gradually changed at the mold forming portion, and the seal line by the door-side seal lip portion 23 may be interrupted. On the other hand, the seal line by the door side seal lip part 24 is continued in the extrusion molding part and the molding part.

  In the door-side seal lip portions 23 and 24, it is difficult to suitably set the amount of elastic contact (elastic deformation amount) with the door panel 10 (the outer peripheral protruding edge 10b), and considering variations in products and mounting, etc. It is difficult to make the amount of elastic contact constant across the entire seal line. In particular, if the amount of elastic contact with the door panel 10 is too large, the door weather strip 2 is inclined toward the vehicle interior while being attached to the door panel 10, and the water stoppage (sealability) and door closing performance are reduced. Become. In the door weather strip 2 of the present embodiment, water stoppage performance and the like that are insufficient in the door-side seal lip portions 23 and 24 are reinforced by a base lip portion 25 described later.

  The base lip portion 25 is formed as a sealing member having a tongue-like cross section, and is formed in the lower end portion on the vehicle outer side of the base portion 20 in an obliquely downward direction toward the vehicle outer side, and is integrally formed with the base portion 20. The base lip portion 25 is continued from the lower end portion of the base portion 20 at the root portion 25a, and is formed so that the axis connecting the root portion 25a and the tip portion 25b is inclined so that the tip portion 25b faces the outside of the vehicle. Yes. By being formed in this way, the base lip portion 25 is elastically contacted with the base surface 10a when the door weather strip 2 is attached to the door panel 10 and when the door is closed, and the distal end portion 25b is pressed against the base surface 10a. By falling toward the outside of the vehicle, a continuous seal line is formed on the door panel 10 side. In particular, the base lip portion 25 of the present embodiment is formed not only in the extrusion molding portion but also in the mold molding portion, and the door weather strip 2 as a whole has a seal line formed by the door-side seal lip portion 24 as the extrusion molding portion and the mold molding. It is continuous in part.

  The recessed groove portion 26 is formed in a substantially V-shaped cross section at a parting portion between the vehicle outer side wall 29 and the base lip portion 25 where the door-side seal lip portions 23 and 24 are formed, and opens toward the vehicle outer side. Has been. Since the front end 25b of the base lip 25 and the vehicle outer side wall 29 are separated by the concave groove 26, the base lip 25 can be elastically contacted with the base surface 10a with the front end 25b tilted toward the vehicle outer side. It is said that.

  The flexible portion 27 is disposed in the recessed groove portion 26 and is formed of an elastic material having a specific gravity lower than that of other portions. The flexible portion 27 is filled from the root portion 25a to the distal end portion 25b of the base lip portion 25 so as to close the concave groove portion 26, and does not protrude obliquely downward toward the vehicle outer side than the distal end portion 25b of the base lip portion 25. Are arranged as follows. As described above, the flexible portion 27 is arranged so as not to protrude obliquely downward toward the vehicle outer side than the front end portion 25b of the base lip portion 25, so that the front end portion 25b of the base lip portion 25 is exposed at the lowermost position. Therefore, when the door weather strip 2 is attached to the door panel 10 and when the door is closed, the distal end portion 25b can be reliably brought into pressure contact with the base surface 10a.

  The material of the flexible portion 27 is preferably formed from a highly foamed sponge material (EPDM or the like) having a specific gravity of 0.15 to 0.4. In general, other portions including the base lip portion 25 are formed of a sponge material or a solid material having a specific gravity greater than 0.4. Therefore, the flexible portion 27 has a lower specific gravity (0.15) than those other portions. To 0.4), a material having a high foaming rate is preferably used. This is because if the flexible portion 27 is formed of a material having a specific gravity greater than 0.4, the door closing performance is lowered.

  In the door weather strip 2 of the present embodiment, the extrusion part is integrally formed with the flexible part 27 and the base part 20 by coextrusion molding, and the base part 20 except the flexible part 27 is the mold part. Molded by molding. As described above, in the mold forming portion, since the flexible portion 27 is not integrally formed, in order to make the reaction force (stress) generated when the base lip 25 portion is elastically contacted with the door panel 10, for example, a concave groove portion. A separate auxiliary material (highly foamed sponge material) may be disposed on the back plate 26.

  As described above, the door weather strip 2 of the present embodiment includes the hollow seal portion 21 and the seal lip portions 22, 23, and 24 (the body side seal lip portion 22 and the door side seal) that seal between the door panel 10 and the body panel 11. Lip portions 23 and 24), the door weather strip 2 includes a base portion 20 and a bottom lower end portion of the base portion 20 that extends in a diagonally downward direction toward the vehicle outer side. The base lip portion 25 to be in contact with, the concave groove portion 26 formed in the parting portion between the vehicle outer side wall 29 and the base lip portion 25 where the door-side seal lip portions 23 and 24 are formed, and the concave groove portion 26 And a flexible portion 27 formed of an elastic material having a specific gravity lower than that of other parts. Therefore, a continuous seal line is formed on the door panel 10 side to form a door. While ensuring closed property, it can improve the water-stopping.

  That is, the door weather strip 2 of the present embodiment is continuously connected to the door panel 10 side by the base lip portion 25 being elastically contacted with the base surface 10a when the door weather strip 2 is attached to the door panel 10 and when the door is closed. The seal line can be formed at the base lip portion 25 over the entire length of the extruded portion and the molded portion, and the door side seal lip portions 23 and 24 can not stop the water. The water stoppage between the door panel 10 and the base portion 20 can be improved.

  In addition, a flexible portion 27 formed of an elastic material having a specific gravity lower than that of other portions is disposed in a recessed groove portion 26 formed in a parting portion between the vehicle outer side wall 29 and the base lip portion 25. Therefore, when the door is closed, the flexible portion 27 contracts and elastically deforms, so that an excessive reaction force of the base lip portion 25 elastically contacted with the base surface 10a can be absorbed and a good door closing property can be ensured. At the same time, the base lip portion 25 can exhibit an appropriate elastic force for maintaining the water stoppage with the door panel 10. Further, since the elastic contact amount (elastic deformation amount) of the base lip portion 25 can be increased, the undulation in the state in which the door weather strip 2 is attached to the door panel 10 is prevented, and the reliability of water stopping is improved. Can be made.

  In particular, in the door weather strip 2 of the present embodiment, the flexible portion 27 is filled and arranged from the root portion 25a to the tip portion 25b of the base lip portion 25 so as to close the concave groove portion 26, so that the portion where the clip 3 is located The flexible portion 27 can be contracted and elastically deformed so that the non-positioned portions are equally uniform, and the reliability of waterstop can be further improved.

  In addition, as a structure of the door weather strip 2, it is not limited to the Example mentioned above, A various change is possible unless it deviates from the objective of this invention. In the following embodiments, unless otherwise specified, each component is formed in the same manner as the above-described embodiments.

  That is, in the door weather strip 2 of the above-described embodiment, the configuration in which the flexible portion 27 is filled and arranged from the root portion 25a to the tip portion 25b of the base lip portion 25 so as to close the concave groove portion 26 has been described. The arrangement configuration of the flexible portion 27 is not limited to this, and for example, the flexible portion 27 may be arranged only on the side surface on the parting portion side of the base lip portion 25 or the side surface on the parting portion side of the vehicle outer side wall 29 in the concave groove portion 26. Good.

  Further, for example, like the door weather strip 102 of the embodiment shown in FIG. 3, the flexible portion 127 that is filled and arranged so as to close the concave groove portion 126 is directed toward the vehicle outer side from the front end portion 125 b of the base lip portion 125. It is configured to protrude downward and obliquely so that the protruding end of the flexible portion 127 is elastically contacted with the base surface 10a together with the base lip portion 125 when the door weather strip 2 is attached to the door panel 10 and when the door is closed. Also good. As described above, the flexible portion 127 protrudes toward the vehicle outer side from the tip end portion 125b of the base lip portion 125 and is elastically contacted with the base surface 10a of the door panel 10, so that the door panel 10 side is on the base lip portion 125. At the same time, since the sealing is performed by the flexible portion 127, the water stoppage between the door panel 10 and the base portion 20 can be further improved.

  Moreover, in the door weather strip 2 (refer FIG. 2) of the Example mentioned above, although the structure in which the flexible part 27 was arrange | positioned only in the concave groove part 26 was demonstrated, the door weather strip 202 of the Example shown in FIG. As described above, the second portion that extends toward the vehicle outer side between the door-side seal lip portion 224 and the base lip portion 225 together with the flexible portion 227 disposed in the concave groove portion 226 and is elastically contacted with the door panel 10. The flexible portion 230 may be provided. By arranging the second flexible portion 230 in this way, it is possible to more reliably prevent water passing into the vehicle on the door panel 10 side.

DESCRIPTION OF SYMBOLS 1 Car 2 Door weather strip 3 Clip 10 Door panel 10a Base surface 10b Outer peripheral edge 11 Body panel 11a Open edge 20 Base part 21 Hollow seal part 22 Body side seal lip part 23 Door side seal lip part 24 Door side seal lip part 25 Base lip part 26 Groove part 27 Flexible part 29 Car outer side wall

Claims (3)

In a door weather strip comprising a base portion attached to a base surface of a door panel, and a hollow seal portion and a seal lip portion for sealing between the door panel and the body panel,
A base lip portion extending in a diagonally downward direction toward the vehicle outer side at a lower end portion on the vehicle outer side of the base portion and elastically contacting the base surface of the door panel;
A recessed groove portion formed in a parting portion that is a portion between the vehicle outer side wall on which the seal lip portion is formed and the base lip portion;
Filled from the base part of the base lip part to the tip part so as to close the concave groove part, arranged so as not to protrude toward the vehicle outer side than the tip part of the base lip part, and has a lower specific gravity than other parts A flexible portion formed of an elastic material of
A door weather strip characterized by comprising:   The door weather strip according to claim 1, wherein the flexible portion is formed of a sponge material having a specific gravity of 0.15 to 0.4. 3. The door weather according to claim 1, further comprising a second flexible portion that extends toward the vehicle outer side between the seal lip portion and the base lip portion and elastically contacts the door panel. strip.

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