JP2006298204A - Weather strip - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a weather strip capable of enhancing the mountability and suppressing occurrence of abnormal noise when an automobile travels at a high speed. <P>SOLUTION: An extruded portion of an upper ridge part of a door weather strip 1 has a main seal member 11, a sub seal member 21, and a connection part 31. The main seal member 11 comprises a substantially flat plate shaped first mounting base part 12 to be mounted on a first retainer 41 of a door frame 40, and a hollow seal part 13 integrated with the first mounting base part 12. The sub seal member 21 has a substantially flat plate-shaped second mounting base part 22 to be mounted on a second retainer 43, and a seal lip 23. A seal part 13 is formed of an EPDM sponge rubber. A part of the first mounting base part 12 and most of the second mounting base part 22 are formed of an EPDM solid rubber. The seal lip 23 is formed of an EPDM sponge rubber, and a part of its base end side is formed of an EPDM solid rubber. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a weather strip that is attached to, for example, the outer periphery of a door of a car or the roof side.

  For example, a weather strip is attached to the outer peripheral edge of an automobile door. Conventionally, a weather strip having a hollow seal portion (main seal portion) and a weather strip having a seal lip (sub seal portion) may be attached to a portion corresponding to the upper side portion of the door. In this case, it is necessary to manufacture the two weather strips separately and to attach them independently.

On the other hand, a technique has been proposed in which a main seal member having a main seal portion and a sub seal member having a sub seal portion are integrated by a connecting portion (see, for example, Patent Document 1). By setting it as such a structure, the man-hour required for manufacture can be reduced and the workability | operativity at the time of attachment can be improved.
JP 2002-307952 A

  By the way, in the above technique, it is general that both the main seal member and the sub seal member have a substantially flat mounting base that is attached to a retainer or the like. Here, from the viewpoint of further improving the workability at the time of mounting, for example, the mounting base portion of the sub seal member is made of a solid material, and one side portion thereof is firmly locked to the retainer, and the other (main seal) It is conceivable that the side portion on the member side is not locked firmly and is also used by locking the main seal member. That is, regarding the other, it can be considered that it depends on locking of the mounting base portion of the main seal portion made of the foam material. Thereby, attachment work can be further simplified.

  However, when configured as described above, the weather strip may be warped when integrally molded due to the difference in foaming rate between the main seal member and the sub-seal member, and hence the difference in expansion rate. . More specifically, when extruding the weather strip, the main seal member is more likely to expand because the attachment base portion of the sub-seal portion is made of a solid material. Therefore, the weather strip may be warped immediately after extrusion (for example, during vulcanization), and the mounting workability may be deteriorated.

  In general, the sub-seal portion is made of a foam material. However, when the automobile is running at high speed, the sub-seal portion may flutter as if pulled out to the outside of the vehicle. Therefore, there is a risk that an abnormal noise will occur.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a weather strip capable of improving the mounting workability and suppressing the generation of abnormal noise during high-speed driving of an automobile. It is in.

  In the following, each means suitable for solving the above-mentioned purpose will be described in terms of items. In addition, the effect etc. peculiar to the means to respond | correspond as needed are added.

Means 1. A first seal member having a first attachment base and a main seal part integrally formed with the first attachment base; a second seal member having a second attachment base and a sub-seal part integrally formed with the second attachment base; A connecting portion for connecting the first seal member and the second seal member,
The main seal portion is made of a foam material,
The first mounting base includes a first hard material component made of a solid material or a fine foam material, and at least part of the first hard material component is configured by the first hard material component,
The second mounting base includes a second hard material component made of a solid material or a microfoam material, and most or all of the second hard material component is constituted by the second hard material component,
The sub-seal part is mostly composed of a foam material, and includes a third hard material constituent part made of a solid material or a fine foam material, and the third hard material constituent part constitutes a part of the base end side. And
The weather strip, wherein the third hard material component is integrally formed with the second hard material component so as to extend from the second hard material component.

  According to the means 1, since the first seal member and the second seal member are connected via the connecting portion, the number of man-hours required for manufacturing can be reduced as compared with the case where they are molded separately. In addition, when mounting, compared with the case where they are mounted separately and independently, there is less trouble and the workability is improved. Further, in the means 1, most or all of the second mounting base is made of a solid material or a fine foam material. Thus, one side of the second mounting base is relatively firmly locked, and the first seal member is relatively firmly fixed without being locked so strongly with respect to the other side of the first seal member. As a result, the overall mounting state can be stably maintained. Therefore, by adopting such an attachment mode, the attachment operation can be remarkably simplified.

  In addition, most or all of the second mounting base is made of a solid material or a fine foam material (second hard material component), and at least a part of the first mounting base is a solid material or a fine foam material (first material). Hard material component). For this reason, unlike the prior art in which warpage may occur due to a difference in foaming rate and consequently expansion rate, both the first seal member and the second seal member have a solid material or a fine foam material, and the expansion Differences are unlikely to occur. Accordingly, it is possible to prevent problems such as deterioration of the mounting workability due to the occurrence of warping, and as a result, it is possible to dramatically improve the mounting workability.

  Further, the sub seal part is mostly made of a foam material, and a part of the base end side is made of a solid material or a fine foam material. Thereby, the rigidity of a sub seal part (base end part side) is improved, and shape retainability can be improved. In particular, since the third hard material component is formed integrally (continuously) with the second hard material component, the risk of the sub-seal portion being greatly deformed around its proximal end is prevented. be able to. By adopting the above configuration, it is possible to suppress flapping of the sub seal portion when the automobile is traveling at high speed. As a result, it is possible to suppress the generation of abnormal noise due to flapping of the sub seal part. Moreover, the front-end | tip part side of a sub seal part can ensure the sealing performance of a sub seal part by comprising with a foaming material as usual.

  The foam material, solid material and fine foam material described in each means will be described. The foam material is a relatively soft sponge material. Specifically, the foam amount (the ratio of the volume of bubbles to the total volume) ) Is more than 25%, and the hardness is preferably JIS-A type and less than 65 degrees. Examples of the material include EPDM (ethylene-diene-propylene copolymer), TPO (olefin-based thermoplastic elastomer), and the like. On the other hand, the solid material and the micro-foamed material are relatively hard and have a predetermined rigidity to such an extent that their own shape can be maintained. Specifically, the hardness of the solid material and the fine foam material is 65 degrees or more and 85 degrees or less in the JIS-A type. Further, in the case of the fine foam material, the foam amount is 25% or less. It is preferable that Examples of the material include EPDM, TPO, PP (polypropylene), and the like. The third hard material constituent part is preferably configured to extend from the second hard material constituent part to a portion of 1/3 or more and 2/3 or less of the protruding width of the sub seal part. By adopting such a configuration, the above-described effect of suppressing the flapping of the sub seal portion during high speed traveling can be more reliably achieved while ensuring the sealing performance of the sub seal portion.

Mean 2. A first sealing member having a substantially flat plate-shaped first mounting base and a hollow main seal portion integrally formed with the first mounting base, and a substantially flat plate-shaped second mounting base and the second mounting base are integrally formed. A second seal member having a lip-shaped sub-seal portion, and a connecting portion for connecting the first seal member and the second seal member,
The main seal portion is made of a foam material,
The first mounting base includes a first hard material component made of a solid material or a fine foam material, and at least part of the first hard material component is configured by the first hard material component,
The second mounting base includes a second hard material component made of a solid material or a microfoam material, and most or all of the second hard material component is constituted by the second hard material component,
The sub-seal part is mostly composed of a foam material, and includes a third hard material constituent part made of a solid material or a fine foam material, and the third hard material constituent part constitutes a part of the base end side. And
The weather strip, wherein the third hard material component is integrally formed with the second hard material component so as to extend from the second hard material component.

  According to the means 2, in addition to the effects similar to those of the means 1, the sealing function by the hollow main seal portion and the lip-shaped sub seal portion is exhibited. Moreover, since both attachment base parts are comprised by substantially flat plate shape, there also exists a merit that it is easy to insert (fitting) in the recessed part (for example, hook-shaped engagement part) of to-be-attached means, such as a retainer.

  Means 3. The weather strip according to means 1 or 2, wherein a portion of the first attachment base that is not directly involved in attachment or sealing is the first hard material component.

  According to the means 3, the portion of the first mounting base that is not directly involved in the mounting or sealing is made of a solid material or a fine foam material, and the other portions are made of foam material. Therefore, it is possible to ensure improved workability during mounting (for example, fitting into a mounting means such as a retainer or fixing with a jig such as a clip), and the sealing performance is not hindered. Note that “a part not directly involved in the attachment” mainly means a part that does not directly contact the attached means or the attachment jig. Further, “the part not directly involved in the seal” mainly means a part that does not contact the mating member to be sealed.

  Means 4. The weather strip according to any one of means 1 to 3, wherein the surface portion visible from the outside in the attached state is made of a foam material.

  According to the means 4, all the surface portions that are visible from the outside in the mounted state are made of the foam material. For this reason, it is hard to produce a difference in an external appearance aspect, and as a result, the fall of external appearance quality can be prevented more reliably.

  Means 5. The ratio of the cross-sectional area of the first hard material constituent part to the cross-sectional area of the second hard material constituent part is set to 1/3 or more and 1 or less, according to any one of means 1 to 4 Weather strip.

  According to the means 5, it is possible to more reliably prevent the above-described warpage. On the other hand, when the ratio of the cross-sectional area is less than 1/3, there is a possibility that the warp preventing effect is not exhibited. Moreover, when the ratio of the cross-sectional area is larger than 1, there is a possibility that the mounting of the first mounting base may be hindered or the first mounting base may be enlarged. In addition, it is good also as "the ratio of a cross-sectional area being 1/2 or more and 1 or less", and it is good also as "the ratio of a cross-sectional area being 2/3 or more and 1 or less."

  Means 6. The first mounting base is fixedly mounted by locking at least both sides thereof to the mounted means, and at least one side of the first mounting base is formed of a foam material. The weather strip according to any of claims 5 to 5.

  According to the means 6, both sides of the first mounting base are locked to the mounted means such as the retainer, so that the first seal member is fixed. In this case, since at least one side portion is made of a foam material, the other side portion is locked first, and then the one side portion is locked, so that it is easy without much resistance. Can be locked. For this reason, it is possible to further improve the mounting workability.

  Mean 7 The weather strip according to any one of means 1 to 6, wherein the connecting portion is made of a foam material.

In general, a predetermined interval is set between the first seal member and the second seal member. According to the means 7, the connecting portion for connecting the two members is made of a foam material. Because
It is relatively easy to extend and has excellent shape followability. For this reason, even if there is a slight installation error in each mounted means for mounting the first mounting base and the second mounting base, the error can be absorbed. As a result, the deterioration of the mounting workability can be prevented, and the mounting state can be stabilized even after the mounting.

  Hereinafter, an embodiment will be described with reference to the drawings.

  The automobile is provided with a front door that can be opened and closed, and a door weather strip 1 as shown in FIG. 2 is attached along the outer periphery of the front door. Most of the door weather strip 1 along the longitudinal direction thereof is constituted by an extruded portion 2. Further, corner portions and the like (portions with the dotted pattern in FIG. 2) are formed by the mold forming portion 3.

  In this embodiment, since there exists a characteristic in the site | part corresponding to a roof side part (upper side part of FIG. 2) among the extrusion molding parts 2 of this door weather strip 1, the structure of the said part is demonstrated below.

  As shown in FIG. 1, the extruded portion 2 in the upper side portion includes a main seal member 11 as a first seal member, a sub seal member 21 as a second seal member, and a connecting portion that connects both the seal members 11 and 21. 31.

  The main seal member 11 is formed in a substantially flat plate-like first attachment base 12 attached to the first retainer 41 of the door frame 40 and the first attachment base 12, and bulges toward the opening peripheral side of the body 42. And a hollow seal portion (main seal portion) 13. The seal portion 13 is made of EPDM (ethylene-diene-propylene copolymer) sponge rubber as a foam material.

  The sub-seal member 21 is formed integrally with the second mounting base portion 22 which is attached to a second retainer 43 positioned on the vehicle outer side than the first retainer 41, and the opening peripheral edge of the body 42. And a seal lip (sub-seal part) 23 protruding toward the surface.

  In the door weather strip 1 having the above-described configuration, when the front door is closed, the hollow seal portion 13 and the seal lip 23 abut against the opening periphery of the body 42 and are deformed. The space between the body 42 and the front door (door frame 40) is sealed.

  In the present embodiment, the substantially central portion of the first mounting base 12 is made of EPDM solid rubber as a solid material (hereinafter, the portion of the first mounting base 12 made of EPDM solid rubber is the first. (Referred to as hard material component SL1). The first hard material constituting portion SL1 is a portion that is not directly related to the attachment of the first mounting base 12 or the seal, and the portions that are directly related to the both sides, that is, the locking to the first retainer 41, are EPDM. Consists of sponge rubber. Further, the first hard material constituting portion SL1 is configured to be exposed only on the first retainer 41 side, and cannot be visually recognized from the outside when the weather strip 1 is attached.

  In the present embodiment, from the viewpoint of further improving workability during mounting, most of the second mounting base portion 22 of the sub-seal member 21 is made of EPDM solid rubber (hereinafter referred to as second mounting base portion 22). Of these, a portion made of EPDM solid rubber is referred to as a second hard material constituting portion SL2.) Further, a portion (upper surface layer portion) of the second mounting base portion 22 that can be visually recognized from the outside in the mounting state of the weather strip 1 is made of EPDM sponge rubber. That is, the second hard material constituent portion SL2 is exposed only on the second retainer 43 side and cannot be visually recognized from the outside when the weather strip 1 is attached.

  Then, the side portion on the vehicle outer side of the second mounting base portion 22 is inserted into the engagement concave portion of the vehicle outer side locking portion (the upper right portion in the figure) of the second retainer 43 to be firmly locked. The side portion on the member 11 side is not locked so firmly. That is, in this embodiment, since the main seal member 11 is integrally formed on the sub seal member 21 via the connecting portion 31, the other side portion of the second mounting base portion 22 has the main seal member 11. By firmly fixing the first mounting base 12 to the door frame 40 of the front door, the door weather strip 1 as a whole can be locked. This greatly simplifies the mounting operation.

  Further, most of the seal lip 23 is made of EPDM sponge rubber, but in this embodiment, a part of the base end side is made of EPDM solid rubber (hereinafter, the seal lip 23). Of these, a portion made of EPDM solid rubber is referred to as a third hard material constituting portion SL3). More specifically, the third hard material constituting portion SL3 is a portion that is 1/3 or more and 2/3 or less of the protruding width of the seal lip 23 from the second hard material constituting portion SL2 (for example, a substantially central portion of the seal lip 23). And is integrally formed with the second hard material constituent portion SL2. The third hard material constituent portion SL3 is covered with EPDM sponge rubber and is not visible from the outside.

  The connecting portion 31 is made of EPDM sponge rubber. That is, the surface layer portions of the second mounting base portion 22 and the seal lip 23, the connecting portion 31, the seal portion 13 and both end portions of the first mounting base portion 11 are continuously formed integrally with EPDM sponge rubber. The ratio of the cross-sectional area of the first hard material constituent portion SL1 to the cross-sectional area of the second hard material constituent portion SL2 is set to be 1/3 or more and 1 or less.

  As described above in detail, according to the present embodiment, the main seal member 11 and the sub seal member 21 are integrated via the connecting portion 31, and therefore, compared to the case where each is molded separately. Man-hours required for manufacturing can be reduced. In addition, when mounting, compared with the case where they are mounted separately and independently, there is less trouble and the workability is improved.

  Further, most of the second mounting base portion 22 is made of EPDM solid rubber. As a result, the side portion on the vehicle exterior side of the second mounting base portion 22 is inserted and locked relatively firmly with respect to the concave portion of the second retainer 43, and the other side portion on the main seal member 11 side is locked so firmly. Even if it does not make it, the attachment state as the whole weather strip can be stably maintained by attaching the main seal member 11 to the 1st retainer 41 comparatively firmly. Therefore, by adopting such an attachment mode, the attachment operation can be remarkably simplified.

  Furthermore, in the present embodiment, most of the second mounting base 22 is made of EPDM solid rubber (second hard material constituent portion SL2), and the substantially central portion of the first mounting base 12 is made of EPDM solid rubber (first It is comprised by the hard material structure part SL1). For this reason, unlike the prior art in which warpage may occur due to the difference in the foaming rate and thus the expansion rate, the solid material exists in both the main seal member 11 and the sub seal member 21, and the expansion rate is different. Is unlikely to occur. Accordingly, it is possible to prevent problems such as deterioration of the mounting workability due to the occurrence of warping, and as a result, it is possible to dramatically improve the mounting workability.

  In particular, the first hard material constituting portion SL1 is provided in the central portion of the first attachment base portion 12 that is not directly involved in attachment or sealing, and the other portions are made of EPDM sponge rubber. For this reason, both sides of the first attachment base 12 are relatively easily deformed, and can be attached to the first retainer 41 without any particular trouble.

  In the present embodiment, a part of the base end portion side of the seal lip 23 is formed of EPDM solid rubber (third hard material constituting portion SL3). Thereby, the rigidity of the base end part side of the seal lip 23 is increased, and the shape retainability can be improved. In particular, since the third hard material constituent portion SL3 is integrally formed with the second hard material constituent portion SL2, it is possible to prevent the seal lip 23 from being largely deformed around its proximal end portion. Can do. By adopting the configuration as described above, it is possible to suppress the fluttering of the seal lip 23 when the automobile is traveling at high speed, and as a result, it is possible to suppress the generation of abnormal noise caused by the flapping of the seal lip 23. . Moreover, the sealing performance of the seal lip 23 can be ensured by configuring the front end side of the seal lip 23 with EPDM sponge rubber.

  Furthermore, in the present embodiment, the weather strip 1 is attached, and the parts that can be visually recognized from the outside are all made of EPDM sponge rubber. For this reason, the malfunction of the external appearance quality fall by employ | adopting a different raw material can be prevented.

  In addition, a predetermined interval is set between the main seal member 11 and the sub seal member 21. In the present embodiment, the connecting portion 31 that connects the both 11 and 21 is made of EPDM sponge rubber. Therefore, the portion is relatively easy to extend, and the shape followability is excellent. Therefore, even if there is a slight installation error regarding the first retainer 41 and the second retainer 43, the error can be absorbed and the first retainer 41 and the second retainer 43 can be attached with a margin. As a result, it is possible to more reliably prevent the deterioration of the mounting workability and to stabilize the mounting state even after the mounting.

  In addition, it is not limited to the description content of the said embodiment, For example, you may implement as follows.

  (A) In the said embodiment, although 3rd hard material structure part SL3 is comprised so that it may be covered with EPDM sponge rubber, the structure which the part exposes may be employ | adopted. For example, as shown in FIG. 3, the third hard material component SL3 may be exposed to the inside of the vehicle, or may be exposed to the outside of the vehicle as shown in FIG. 4. Further, as shown in FIG. 5, the third hard material constituting portion SL3 is configured such that a portion near the base end portion of the seal lip 23 is exposed to the inside of the vehicle and a tip portion is exposed to the outside of the vehicle. May be.

  (B) In the above embodiment, the first hard material constituting portion SL1 is exposed to the first retainer 41 side. However, as shown in FIG. 3, the first hard material constituting portion SL1 is made of EPDM sponge rubber. It is good also as a structure covered. Further, although not shown, the same applies to the second hard material component SL2. Needless to say, the entire circumference of the weather strip 1 may be covered with EPDM sponge rubber.

  (C) In the above embodiment, the first attachment base 12 is attached by being fitted to the first retainer 41. However, as shown in FIG. It is good. In this case, as shown in the figure, the first hard material constituting portion SL1 is provided in a portion that does not contact the clip 44, that is, a portion that is not directly involved in attachment (does not affect the assembly). Is desirable. This is because the clip 44 is easy to attach and the presence of two solid rubbers continuously on both sides of the clip 44 stabilizes the rigidity in the longitudinal direction, and the weather strip between the clips 44. This is because the sealing property between the door frame can be secured.

  (D) In the above embodiment, the door weather strip 1 is attached to the front door, but may be applied to a door weather strip for a rear door. It can also be embodied in a roof side weather strip on the body side. Further, it can be applied to a weather strip for sealing other doors (sliding doors and back doors).

  (E) In the above embodiment, an EPDM sponge material is used as the foam material, but other foam materials may be used as long as the material is relatively flexible. Specifically, the foaming amount (ratio of the volume of bubbles in the total volume) is more than 25%, and the hardness is preferably less than 65 degrees in the JIS-A type. Examples of other materials include TPO. On the other hand, an EPDM solid material is used as the solid material, but other solid materials or fine foam materials may be used as long as they have a certain degree of shape retention. Specifically, the hardness is 65 degrees or more and 85 degrees or less in the JIS-A type. Further, in the case of a fine foam material, the foaming amount is preferably 25% or less. Examples of the material include TPO and PP.

It is the JJ sectional view taken on the line of FIG. 2 which shows the principal part of the door weather strip in one Embodiment. It is a front view which shows typically schematic structure of a door weather strip. It is sectional drawing which shows the weather strip of another embodiment. It is sectional drawing which shows the weather strip of another embodiment. It is sectional drawing which shows the sub seal | sticker member of another embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Door weather strip, 2 ... Extrusion part, 11 ... Main seal member as 1st seal member, 12 ... 1st attachment base, 13 ... Seal part as main seal part, 21 ... As 2nd seal member Sub seal member, 22 ... second mounting base, 23 ... seal lip as sub seal portion, 31 ... connecting portion, 40 ... door frame, 41 ... first retainer as attached means, 43 ... second retainer, SL1 ... first Hard material component, SL2 ... second hard material component, SL3 ... third hard material component.

Claims (6)

A first seal member having a first attachment base and a main seal part integrally formed with the first attachment base; a second seal member having a second attachment base and a sub-seal part integrally formed with the second attachment base; A connecting portion for connecting the first seal member and the second seal member,
The main seal portion is made of a foam material,
The first mounting base includes a first hard material component made of a solid material or a fine foam material, and at least part of the first hard material component is configured by the first hard material component,
The second mounting base includes a second hard material component made of a solid material or a microfoam material, and most or all of the second hard material component is constituted by the second hard material component,
The sub-seal part is mostly composed of a foam material, and includes a third hard material constituent part made of a solid material or a fine foam material, and the third hard material constituent part constitutes a part of the base end side. And
The weather strip, wherein the third hard material component is integrally formed with the second hard material component so as to extend from the second hard material component. A first flat plate-shaped first mounting base and a first seal member having a hollow main seal portion integrally formed with the first mounting base, and a substantially flat plate-shaped second mounting base and the second mounting base are integrally formed. A second seal member having a lip-shaped sub-seal portion, and a connecting portion for connecting the first seal member and the second seal member,
The main seal portion is made of a foam material,
The first mounting base includes a first hard material component made of a solid material or a fine foam material, and at least part of the first hard material component is configured by the first hard material component,
The second mounting base includes a second hard material component made of a solid material or a microfoam material, and most or all of the second hard material component is constituted by the second hard material component,
The sub-seal part is mostly composed of a foam material, and includes a third hard material constituent part made of a solid material or a fine foam material, and the third hard material constituent part constitutes a part of the base end side. And
The weather strip, wherein the third hard material component is integrally formed with the second hard material component so as to extend from the second hard material component.   3. The weather strip according to claim 1, wherein a portion of the first mounting base that does not directly participate in mounting or sealing is the first hard material component. 4.   The weather strip according to any one of claims 1 to 3, wherein a surface portion visible from the outside in an attached state is made of a foam material.   5. The ratio of the cross-sectional area of the first hard material constituent part to the cross-sectional area of the second hard material constituent part is set to one third or more and one or less. Weather strip. The first mounting base is mounted and fixed by locking at least both sides thereof to the mounted means, and at least one side of the first mounting base is formed of a foam material. The weather strip according to any one of 1 to 5.

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