JP2011207255A - Weather strip and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a weather strip and a method for manufacturing the same, allowing prevention of falling of a clip, while improving manufacturing workability, regarding the weather strip made of rubber and including the clip.SOLUTION: This door weather strip 5 includes a weather strip body 7 composed of sponge EPDM and attached to a peripheral edge part of a door 4, and the clip 8 composed of thermoplastic resin to mount the weather strip body 7 on the door 4. The weather strip body 7 includes a mounting base part 11 mounted with the clip 8 and a main sealing part 12 extending from the mounting base part 11. The mounting base part 11 is fixed with a resin sheet 9 compatible with both of the weather strip body 7 and the clip 8 by being interposed between the mounting base part 11 and the clip 8. The mounting base part 11 and the resin sheet 9 are thermally welded, and the resin sheet 9 and the clip 8 are thermally welded.

Description

  The present invention relates to a weather strip that is attached to the periphery of an opening formed in a vehicle body or the periphery of an opening / closing member that opens and closes the opening, and a method of manufacturing the weather strip.

  Generally, a door weather strip is attached to a peripheral portion of a door that opens and closes a door opening formed in a body of an automobile or the like. The door weather strip includes an attachment base attached to an attachment provided along the peripheral edge of the door, and a seal portion formed integrally with the attachment base. When the door is closed, the seal portion of the door weather strip is brought into pressure contact with the peripheral edge portion of the door opening portion, thereby sealing between the door and the body.

  As one method for attaching the door weather strip, a method using a clip is known (for example, see Patent Document 1). The clip includes a locking portion that is locked to the mounting base portion of the door weather strip, and an engaging portion that is fitted into and engaged with a mounting hole formed in the mounting portion of the door peripheral portion. The locking portion includes a substantially rod-shaped locking piece portion, and a connecting portion that connects a substantially central portion in the longitudinal direction of the locking piece portion and the engaging portion, and has a substantially T-shape as a whole.

  By the way, in order to attach the clip to the attachment base, it is necessary to form an insertion hole for inserting the locking piece portion and the connecting portion into the attachment base using a drilling tool such as a drill or a drill. Further, when forming the insertion hole, it is necessary to remove formed waste generated along with the formation with a suction device or the like. Furthermore, apart from the step of forming the insertion hole, a step of screwing the locking portion into the insertion hole and locking the locking piece portion to the mounting base is required. For this reason, in addition to increasing the number of man-hours, the clip can easily fall off the mounting base due to the insertion hole expanding or tearing around the insertion hole when the clip is attached to the mounting base. Is concerned.

  On the other hand, there is a technique in which a clip is thermally welded to a weather strip made of an olefin-based thermoplastic elastomer (TPO) (see, for example, Patent Document 2).

Japanese Utility Model Publication No.59-20016 JP 2003-80952 A

  By adopting the configuration of Patent Document 2, there is no need to form an insertion hole for attaching the clip to the attachment base, and no work for screwing the clip into the insertion hole is required, thereby improving workability. Can be planned. Furthermore, since the attachment base and the clip are heat-welded and integrated, it is possible to reliably prevent the clip from falling off.

  However, when the weather strip is composed of an olefin-based thermoplastic elastomer, since it is compatible with the resin clip, it is possible to suitably heat-bond both, but the weather strip is EPDM. When it is made of a rubber material such as (ethylene-propylene-diene copolymer rubber), the clip may not be suitably heat-welded as described above.

  The present invention has been made to solve the above problems, and an object of the present invention relates to a rubber weather strip provided with a clip, which prevents the clip from falling off while improving manufacturing workability. An object of the present invention is to provide a weather strip that can be manufactured and a method of manufacturing the same.

  In the following, each means suitable for solving the above-described problems 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. An opening base formed in a vehicle body, or a mounting base attached to a mounting portion formed at a peripheral edge of an opening / closing member that opens and closes the opening, and the opening / closing member closing the opening / closing member A weather strip main body made of a rubber material, comprising a seal portion for sealing between a peripheral portion of the opening and a peripheral portion of the opening and closing member;
A weather strip that is attached to the attachment base and is made of a thermoplastic resin material and includes a clip for attaching the weather strip body to the attachment portion.
At least sheet-like fixing means fixed to the mounting base so as to be interposed between the mounting base and the clip,
Of the fixing means, the surface on the mounting base side is composed of at least a thermoplastic material compatible with the weather strip body, and the surface on the clip side is composed of at least a thermoplastic material compatible with the clip. And
The weather strip, wherein the attachment base and the fixing means are thermally welded, and the fixing means and the clip are thermally welded.

  According to the means 1, even if the weather strip main body is made of rubber and the compatibility with the clip is not sufficient, the fixing means is interposed between the mounting base and the clip, and the mounting base and the fixing means The clip can be attached to the mounting base by thermally welding the fixing means and the clip. Also, unlike the conventional type in which the clip is fitted and attached to the mounting base (through and locked), a comparison is made such that a clip mounting insertion hole is formed in the mounting base or a clip is screwed into the insertion hole. No complicated work is required. Therefore, the manufacturing process can be simplified and work efficiency can be improved while avoiding a situation where the attachment part of the clip in the attachment base is damaged. Furthermore, since the mounting base, the fixing means, and the clip are integrated, it is possible to prevent the clip from falling off the weather strip body, and the weather strip can be stably mounted to the opening / closing member or the body. . As a result, by attaching the clip to the weather strip main body by thermal welding, the advantages of using a rubber material as the constituent material of the weather strip main body can be obtained while improving the manufacturing workability and preventing the clip from falling off. be able to.

  Mean 2. The weather strip according to means 1, wherein the fixing means is provided corresponding to a portion of the mounting base where the clip is provided.

  According to the means 2, since the fixing means is provided intermittently, it is difficult to bend the weather strip by the fixing means, leading to a decrease in mounting workability and an unstable mounting state. It is possible to suppress such a situation. Further, resource saving can be achieved.

  Means 3. The attachment base is formed with a recess at a portion to which the fixing means is fixed, and the fixing means is thermally welded to the recess not only on the surface facing the bottom surface of the recess, but also on the side surface. The weather strip according to means 1 or 2.

  According to the means 3, not only the heat welding area between the fixing means and the mounting base is simply increased, but the side portions of the fixing means are fixed relatively firmly. For this reason, the fixing means is hardly peeled off, and the fixing state can be stabilized. In addition, positioning when the fixing means is thermally welded to the mounting base becomes relatively easy, and positional deviation of the fixing means after heat welding can be prevented.

  Means 4. The mounting base is formed with a recess at a portion where the fixing means is fixed, and the fixing means is such that the surface of the mounting base is thermally welded not only to the bottom surface of the recess, but also to the side surface. 3. The wafer according to means 1 or 2, wherein the fixing means is heat-welded not only to a portion thermally welded to the bottom surface of the concave portion but also to a portion thermally welded to the side surface of the concave portion. The strip.

  According to the means 4, not only the heat welding area between the fixing means and the clip is simply increased, but also the heat welding area between the fixing means and the clip in the outer peripheral direction of the opening or the opening / closing member can be increased. For this reason, even if the weather strip body is swung in various directions, the clip is difficult to peel off from the fixing means, and the mounting state can be stabilized. In addition, positioning when the fixing means is thermally welded to the mounting base becomes relatively easy, and positional deviation of the fixing means after welding can be prevented.

Means 5. A method for producing a weather strip according to any one of the above means 1 to 4,
An extrusion process for extruding the weatherstrip body;
A vulcanization step of vulcanizing the extruded weatherstrip body;
A fixing step in which the fixing means is thermally welded to the weather strip main body immediately after the vulcanization step using residual heat of the weather strip main body,
A method of manufacturing a weather strip, comprising: an attaching step of thermally welding the clip to a fixing means welded to a weather strip body.

  According to the means 5, the weather strip described in any one of the means 1 to 4 can be obtained. Further, since the fixing means is thermally welded to the weather strip body before the clip is thermally welded to the fixing means, the fixing means to which the clip is welded is welded to the weather strip body. Compared to the configuration, it is easy to hold the fixing means during welding, and it is easy to apply a uniform force to the entire fixing means when the fixing means is pressed against the weather strip body during welding. Accordingly, it is possible to improve the manufacturing workability while preventing the occurrence of poor welding. Furthermore, since the fixing means is thermally welded to the weather strip body using the residual heat of the weather strip body immediately after vulcanization, the step of separately heating the fixing means for the heat welding of both is omitted. It is possible to improve manufacturing workability, save energy, and the like.

It is a perspective view of a car with a front door in an open state. It is sectional drawing of a door weather strip. It is a perspective view of a clip. It is a perspective view containing the partial cross section which shows a door weather strip. It is sectional drawing of the door weather strip in another embodiment. It is a perspective view containing the partial cross section of the door weather strip in another embodiment. It is sectional drawing of the door weather strip in another embodiment.

  Hereinafter, an embodiment will be described with reference to the drawings. As shown in FIG. 1, an automobile 1 as a vehicle is provided with a door 4 as an opening / closing member that opens and closes a door opening 3 formed in a body 2. A door weather strip 5 is attached to the peripheral portion of the door 4 (front door in the figure) to seal between the door 4 and the peripheral portion of the door opening 3 when the door 4 is closed. The door weather strip 5 is formed of an extruded body that is formed by a predetermined extrusion molding machine over almost the entire length in the longitudinal direction, and the ends of the extrusion molded body are connected to each other by molding to form a substantially annular shape as a whole. ing.

  As shown in FIG. 2, the door weather strip 5 includes a weather strip body 7 extending along the peripheral edge of the door 4, and a clip 8 for attaching the weather strip body 7 to the door 4. Yes. The clips 8 are provided at predetermined intervals along the longitudinal direction of the weather strip body 7. In the present embodiment, the weather strip body 7 is made of sponge EPDM (ethylene-propylene-diene copolymer rubber) that is a rubber material, and the clip 8 is made of polyacetal that is a thermoplastic resin.

  The weather strip main body 7 includes an attachment base 11 to which the clip 8 is attached, a main seal portion 12 that protrudes from the attachment base 11 to the outer peripheral side of the door 4 and the inside of the vehicle, and has a hollow portion 12a inside. And a rear seal portion 13 that extends from the mounting base 11 to the vehicle outer side on the vehicle outer side than the main seal portion 12. When the door 2 is closed, the main seal portion 12 comes into pressure contact with the peripheral edge portion of the door opening 3 of the body 2, thereby sealing between the body 2 and the door 4.

  The mounting base 11 includes a substantially flat base portion 11a, a vehicle inner side wall portion 11b and a vehicle outer side wall portion 11c extending from the upper surface of the base portion 11a toward the outer peripheral side of the door 4, and both side wall portions. 11b, 11c and a bridge portion 11d for connecting the tip portions of 11c. The vehicle inner side wall portion 11b and the vehicle outer side wall portion 11c are located on the inner side (center side in the vehicle width direction of the base portion 11a) than the both side portions of the base portion 11a. A vehicle interior piece 17 positioned on the vehicle interior side with respect to the vehicle interior side wall portion 11b and a vehicle exterior piece portion 18 positioned on the vehicle exterior side with respect to the vehicle exterior side wall portion 11c are formed. In addition, the vehicle inner piece 17 and the vehicle outer piece 18 are provided with ribs 17 a and 18 a that protrude toward the inner peripheral side of the door 4.

  As shown in FIG. 2, the door frame 31 (see FIG. 1) that partitions the window portion W of the door 4 includes a bottom wall portion 32 that extends in the thickness direction of the door 4 and an inner edge of the bottom wall portion 32. A vehicle inner side latching portion 33 that extends upward from the vehicle and has a front end bent toward the vehicle outer side, and a vehicle outer side locking portion that extends upward from the vehicle outer edge of the bottom wall portion 32 and the front end side is bent toward the vehicle inner side. 34, a retainer portion DR having a substantially C-shaped cross section, a folded portion 35 that is folded back from the front end edge of the vehicle outer side engaging portion 34 toward the outer peripheral side of the door 4 and extends to the vehicle outer side, and a vehicle outer end of the folded portion 35 And a vertical wall portion 36 extending from the edge to the outer peripheral side of the door 4. In addition, attachment holes 37 are formed in the bottom wall portion 32 at predetermined intervals along the circumferential direction of the door frame 31. In addition, the folded portion 35 is located on the inner peripheral side of the door 4 with respect to the back seal portion 13 in a state where the door weather strip 5 is attached to the door 4.

  When the door weather strip 5 is attached to the door 4, the base portion 11 a of the mounting base portion 11 is fitted inside the retainer portion DR, and the vehicle interior piece portion 17 of the base portion 11 a is attached to the vehicle interior engagement portion 33. While being locked, the vehicle outer side piece 18 is locked to the vehicle outer side locking portion 34. Further, the tip portion of the back seal portion 13 is pressed against the vertical wall portion 36.

  In the door panel 39 (see FIG. 1), the retainer portion DR as provided in the door frame 31 is omitted for reasons such as weight reduction. For this reason, with respect to the portion of the door weather strip 5 that is attached to the door panel 39, the clip 8 is fitted into an attachment hole formed in a portion of the inner panel that constitutes the door panel 39 that is folded outward. It is attached to the door 4. In the present embodiment, the retainer portion DR corresponds to the attachment portion in the door frame 31, and the portion of the inner panel that is folded back to the vehicle exterior and has the attachment hole corresponds to the attachment portion in the door panel 39.

  As shown in FIG. 3 and the like, the clip 8 includes a rod-shaped shaft portion 41, an umbrella portion 42 that spreads in a bowl shape from one end portion of the shaft portion 41, and the umbrella portion 42 toward the umbrella portion 42 side from the intermediate position in the longitudinal direction of the shaft portion 41. And a pair of support piece portions 43 that protrude in an inclined manner. The support piece portion 43 is provided so as to be elastically deformable so as to tilt around the boundary portion with the shaft portion 41. Further, as shown in FIG. 2, a stepped portion 45 is formed on the outer surface side by forming a protrusion 44 at the tip of each support piece portion 43. In addition, an auxiliary plate portion 46 that connects the inner surface of each support piece portion 43 and the umbrella portion 42 is provided.

  The umbrella part 42 includes a flat disk-shaped center part 42a and an outer edge part 42b extending from the outer peripheral edge of the center part 42a toward the outer peripheral side of the center part 42a and toward the shaft part 41 side. Although described later in detail, in the present embodiment, the center portion 42 a of the umbrella portion 42 is attached to the weather strip body 7. When the door weather strip 5 is attached to the door 4, the clip 8 is fitted into the attachment hole 37 formed in the bottom wall portion 32 of the retainer portion DR, and the outer edge portion 42 b and the step portion 45 of the umbrella portion 42 The peripheral edge of the mounting hole 37 is sandwiched. Further, the protrusions 44 of the clip 8 are positioned on the inner peripheral side of the mounting hole 37, thereby preventing the positional displacement of the clip 8 fitted into the mounting hole 37 and thus the door weather strip 5. In this attachment state, the outer edge portion 42 b of the umbrella portion 42 is pressed against the bottom wall portion 32 so as to surround the attachment hole 37, and the attachment hole 37 is covered by the umbrella portion 42. Is sealed.

  In the present embodiment, as shown in FIGS. 2 and 4, the resin sheet 9 as the fixing means is fixed to the base portion 11 a of the attachment base portion 11. The resin sheet 9 of the present embodiment is made of acid-modified polyethylene and has compatibility with both the weather strip body 7 made of EPDM and the clip 8 made of polyacetal. And the base part 11a of the attachment base 11 and the resin sheet 9 are thermally welded over the whole longitudinal direction of the weather strip main body 7 (extrusion molding part), and the center part of the umbrella part 42 of the resin sheet 9 and the clip 8 is carried out. 42a is thermally welded. Thereby, the attachment base 11, the resin sheet 9, and the clip 8 are integrated.

  Next, a method for manufacturing the door weather strip 5 will be described. First, EPDM unvulcanized rubber is continuously supplied to an extruder, and the weather strip body 7 is extruded from a die. The extruded weather strip body 7 is guided and vulcanized by a vulcanizing tank having a microwave heating device (UHF) and a hot air vulcanizing device (HAV). Subsequently, the resin sheet 9 is fixed to the weather strip body 7 immediately after vulcanization. More specifically, the resin sheet 9 is swung in a roll shape, and is sequentially fed out in synchronization with the transport of the weather strip body 7. The resin sheet 9 and the mounting base 11 are pressed against each other by a pressure roller that presses the resin sheet 9 against the base 11 a of the mounting base 11. At this time, the weather strip body 7 is relatively hot immediately after vulcanization, and the resin sheet 9 is attached by the residual heat of the weather strip body 7 by the pressure contact between the resin sheet 9 and the attachment base 11. It is heat welded to the base 11.

  Next, the clip 8 is attached to the attachment base 11 to which the resin sheet 9 is fixed. More specifically, the clip 8 and the resin sheet 9 are thermally welded by pressing the umbrella portion 42 of the clip 8 separately heated against the resin sheet 9 thermally welded to the mounting base 11. After cooling, the weather strip body 5a is cut into a predetermined size by a cutting device. Thereafter, the cut end portions of the weather strip body 5a are connected to each other. The annular door weather strip 5 is manufactured as described above.

  As described above in detail, in the present embodiment, the acid having compatibility between the weather strip body 7 and the clip 8 is provided between the mounting base 11 of the weather strip body 7 made of sponge EPDM and the clip 8 made of polyacetal. A resin sheet 9 made of modified polyethylene is interposed. Therefore, the clip 8 can be attached to the attachment base 11 by thermally welding the attachment base 11 and the resin sheet 9 and thermally welding the resin sheet 9 and the clip 8. In addition, unlike the conventional type in which the clip 8 is fitted and attached to the attachment base 11 (through and locked), an insertion hole for attaching the clip is formed in the attachment base 11 or a clip is screwed into the insertion hole. There is no need for relatively troublesome installation work. Therefore, the manufacturing process can be simplified and work efficiency can be improved while avoiding the situation where the attachment part of the clip 8 in the attachment base 11 is damaged. Further, since the mounting base 11, the resin sheet 9, and the clip 8 are integrated, it is possible to prevent the clip 8 from falling off the weather strip body 7, and the door weather strip 5 can be stably attached to the door 4. Can be installed on. As a result, by attaching the clip 8 to the weather strip main body 7 by heat welding, it is possible to improve the manufacturing workability and prevent the clip 8 from falling off, and adopt the sponge EPDM as the constituent material of the weather strip main body 7. You can enjoy the benefits.

  The weather strip body 7 is made of sponge EPDM, so that the flexibility of the door weather strip 5 is improved as compared with the case where the weather strip body 7 is made of an olefinic thermoplastic elastomer (TPO), for example. Can be made. That is, it is possible to improve the shape followability in the attached state to the door 4 (retainer portion DR), and to stabilize the attached state and improve the workability of attachment. In addition, there is a concern that the door 4 will be difficult to close if the reaction force of the main seal portion 12 is too great with respect to the lighter door 4 in recent years. However, if the weather strip body 7 is made of sponge EPDM, The weight can be reduced, and the closing performance of the door 4 can be improved while ensuring the sealing performance.

  In the present embodiment, the resin sheet 9 is heat-welded to the weather strip body 7 before the clip 8 is heat-welded to the resin sheet 9. For this reason, the resin sheet 9 to which the clip 8 is welded is easier to hold the resin sheet 9 during welding than the configuration in which the resin sheet 9 is welded to the weather strip body 7 and the resin sheet 9 is welded to the weather strip during welding. When press-contacting to the main body 7, it is easy to apply a uniform force to the entire resin sheet 9. Accordingly, it is possible to improve the manufacturing workability while preventing the occurrence of poor welding. Moreover, since the resin sheet 9 is provided in the entire longitudinal direction of the weather strip body 7, it is possible to suppress the complexity of the manufacturing process and the manufacturing apparatus as compared with the case where the resin sheet 9 is provided intermittently.

  Furthermore, since the resin sheet 9 is thermally welded to the weather strip body 7 using the residual heat of the weather strip body 7 immediately after vulcanization, the resin sheet 9 and the like are separately heated for the heat welding of both. The manufacturing workability can be improved and energy saving can be achieved.

  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) As shown in FIG. 5, a concave portion 51 is formed (at the time of extrusion molding) at a portion where the resin sheet 9 is fixed to the base portion 11 a of the mounting base portion 11. You may comprise so that it may be heat-welded with the recessed part 51 not only on the surface which opposes but about a side surface. 5 shows a cross section of a portion of the door weather strip 5 attached to the door panel 39. In this portion, an attachment hole 37 is provided at an edge (attachment portion 50) of the inner panel 39a constituting the door panel 39. The door weather strip 5 is fixed with a clip 8. When the recess 51 is formed and the resin sheet 9 is heat-welded as shown in FIG. 5, not only the heat-welding area between the resin sheet 9 and the mounting base 11 is increased, but both sides of the resin sheet 9 are also provided. The part is fixed relatively firmly. For this reason, it becomes difficult for the resin sheet 9 to peel off, and stabilization of the fixed state can be achieved. In addition, positioning when the resin sheet 9 is thermally welded to the mounting base 11 is relatively easy, and positional displacement of the resin sheet 9 after the heat welding can be prevented. Further, it is possible to suppress a situation in which the molten resin sheet 9 protrudes (flows out) from an intended installation range, and it is possible to prevent problems caused by the resin sheet 9 sticking to an unintended part, and the resin sheet after heat welding 9 can be prevented from thinning, and the resin sheet 9 can be prevented from being heat-welded due to the thin resin sheet 9. Further, it is conceivable that the clip 8 protrudes by the thickness of the resin sheet 9 by interposing the resin sheet 9 between the mounting base 11 and the clip 8, but the recess 51 is formed as in this embodiment. By doing so, such a situation can be avoided. Therefore, due to the relatively large protrusion of the clip 8, the attachment base portion 11 rises relatively large from the attachment portion 50, leading to deterioration in sealing performance, instability of the attachment state, deterioration in design, and the like. Such a situation can be suppressed.

  In FIG. 5, the recess 51 is formed at a position avoiding the vehicle inner piece 17 and the vehicle outer piece 18 (the formation range of the recess 51 may protrude beyond the vehicle inner side wall 11 b as much as possible. It is designed not to protrude beyond the vehicle side wall portion 11c). Accordingly, it is possible to suppress a situation in which the vehicle inner piece 17 and the vehicle outer piece 18 are hardly bent by the resin sheet 9, and the door weather strip 5 is attached to the retainer DR as shown in FIG. In this case, it is possible to suppress a situation in which the workability of the mounting is deteriorated because the vehicle inner piece 17 and the vehicle outer piece 18 are difficult to bend. Further, even in the configuration in which the recess 51 is not formed as in the above-described embodiment, the resin sheet 9 is located on the vehicle outer side with respect to the vehicle inner side surface of the vehicle inner side wall portion 11b and on the vehicle inner side with respect to the vehicle outer side surface of the vehicle outer side wall portion 11c. It may be provided in the range.

  (B) Also, as shown in FIG. 5, a plurality of small protrusions 53 may be provided at the same time as the mounting base 11 at the time of extrusion molding at the base 11 a of the mounting base 11 (inside the recess 51 in FIG. 5). Good. In this case, the melted resin sheet 9 enters between the protrusions 53, and as a result, the heat-welded area is increased, and the fixing state between the mounting base 11 and the resin sheet 9 can be stabilized. In addition, the welding surface of the center portion 42a of the umbrella portion 42 of the clip 8 may have an uneven shape (provided with a plurality of protrusions or protrusions). In this case, the welding state between the clip 8 and the resin sheet 9 can be stabilized.

  (C) In the above embodiment, the resin sheet 9 is continuously provided over the entire longitudinal direction of the weather strip main body 7, but the resin sheet 9 only needs to be provided at least at a portion to which the clip 8 is attached. For example, as shown in FIG. 6, it is good also as welding the resin sheet 9 intermittently (intermittently) corresponding to the site | part in which the clip 8 is provided. In this case, the door weather strip 5 is less likely to be bent by the resin sheet 9 that is harder than the weather strip body 7, and it is possible to suppress a situation in which the mounting workability is deteriorated or the mounting state is unstable. . Further, resource saving can be achieved.

  (D) Further, as shown in FIG. 7, a recess 51 is formed in a portion where the resin sheet 9 is fixed to the base portion 11 a of the attachment base 11 (at the time of extrusion molding), and the attachment base 11 of the resin sheet 9 is formed. The side surface may be configured to be thermally welded not only to the bottom surface of the recess 51 but also to the side surface of the recess 51. Furthermore, the clip 8 may be heat-welded not only to the portion of the resin sheet 9 that is heat-welded to the bottom surface of the recess 51 but also to the portion that is heat-welded to the side surface of the recess 51. In this case, not only the thermal welding area between the resin sheet 9 and the clip 8 is simply increased, but also the thermal welding area between the resin sheet 9 and the clip 8 in the outer peripheral direction of the door 2 can be increased. For this reason, even if the weather strip body 7 is swung in various directions, the clip 8 is difficult to peel off from the resin sheet 9, and the mounting state can be stabilized. Further, positioning when the resin sheet 9 is thermally welded to the mounting base 11 is relatively easy, and a positional shift of the resin sheet 9 after welding can be prevented.

  (E) In the above embodiment, the resin sheet 9 is thermally welded to the mounting base 11 using the residual heat of the weatherstrip body 7 immediately after the vulcanization step, but this is particularly limited to such a configuration. Instead, for example, after the weatherstrip body 7 is cut into a predetermined length, the attachment base 11 and the resin sheet 9 may be thermally welded by heating the resin sheet 9 or the like. However, as in the above embodiment, the workability and the like are superior when the resin sheet 9 is thermally welded using the residual heat of the weather strip body 7. Further, for example, the resin sheet 9 and the clip 8 are heat-welded before the resin sheet 9 and the like are cooled, so that the resin sheet 9 is not heated again or the cooling process is not performed twice. The manufacturing process can be simplified and energy can be saved.

  (F) In the above embodiment, the resin sheet 9 is welded to the weather strip body 7 and then the clip 8 is welded to the resin sheet 9. However, after the clip 8 is welded to the resin sheet 9, the resin sheet 9 may be welded to the weather strip body 7. Even in the case of adopting this configuration, the resin sheet 9 may be provided in the entire longitudinal direction of the weather strip main body 7, or the resin sheet 9 is configured to exist only in a portion where the clip 8 is attached. Also good. However, from the viewpoint of manufacturing workability and resource saving, it is preferable to configure the resin sheet 9 to exist only in the portion where the clip 8 is attached.

  (G) In the above embodiment, the resin sheet 9 is made of a single material and has a single layer, but may have a multilayer structure. Further, the material constituting the resin sheet 9 is not particularly limited. That is, the surface of the resin sheet 9 on the side of the mounting base 11 is made of a thermoplastic resin compatible with the mounting base 11, and the surface of the clip 8 is made of a thermoplastic resin compatible with the clip 8. That's fine. For example, when the resin sheet 9 is made into a multilayer, the compatibility between the resin sheet 9 and the mounting base 11 can be further increased, and the compatibility between the resin sheet 9 and the clip 8 can be further increased. In addition, when comprising the resin sheet 9 by a multilayer, adjacent layers may be fixed with the adhesive agent.

  For example, as a material constituting the resin sheet 9, in addition to acid-modified polyolefin (for example, trade name: Admer etc., manufactured by Mitsui Chemicals, Inc.), a special ethylene copolymer (for example, product name: Bond, manufactured by Sumitomo Chemical Co., Ltd.). Fast etc.), highly adhesive resin (for example, trade name: Modic etc. manufactured by Mitsubishi Chemical Corporation) and the like.

  (H) In the above embodiment, the door weather strip 5 of the front door is embodied, but the weather that seals between the other opening formed in the body 2 and the opening / closing member that opens and closes the opening. It can also be applied to strips. Examples of the opening / closing member include a front door, a rear door, a back door, a luggage door (trunk lid), a roof door (sliding roof panel), an engine hood (bonnet), and a sliding door.

  Further, in the above embodiment, it is described that the resin sheet 9 is provided in the attachment base portion 11 to which the clip 8 is attached. However, the resin sheet 9 is not only attached to the attachment base portion 11 but also in other portions to which the clip 8 is attached. It is good also as attaching the clip 8 to the weatherstrip main body 7 by interposing.

  (I) In the above embodiment, the weather strip body 7 is formed of sponge EPDM, but may be formed of other synthetic rubber materials or solid EPDM. Furthermore, in the said embodiment, although the attachment base 11, the main seal part 12, and the back surface seal part 13 are all comprised with the same material, you may use a partially different material. For example, the main seal portion 12 and the back seal portion 13 may be made of sponge EPDM, and the attachment base portion 11 may be made of solid EPDM or fine foam sponge EPDM.

  Further, the shape (cross-sectional shape) of the weather strip main body 7 is not particularly limited, and can be appropriately changed according to the part to be attached and the vehicle type. For example, in the above embodiment, the main seal portion 12 that presses against the peripheral edge of the door opening 3 when the door 4 is closed and seals between the door 4 and the body 2 has a hollow shape, but has a lip shape. It may be formed. Further, in addition to the hollow main seal portion 12, a lip-shaped seal portion may be configured to be in pressure contact with the peripheral portion of the door opening 3 when the door 4 is closed. Moreover, in the said embodiment, although the attachment base 11 is hollow shape by presence of the bridge | bridging part 11d, you may make the attachment base 11 solid. In addition, in this embodiment, since it is not the structure which screws and attaches the clip 8 to the attachment base 11, even if the thickness of the attachment base 11 is thick, there is no possibility that the attachment workability | operativity of the clip 8 will fall.

  Furthermore, in the said embodiment, although the substantially whole area of the longitudinal direction of the door weather strip 5 is comprised by the weather strip main body 7 which is an extrusion molding body, the terminal parts are connected by molding, May be not connected, or the annular door weather strip 5 may be configured by connecting a plurality of weather strip bodies 7 with a plurality of mold forming portions.

  (J) In the above embodiment, the clip 8 is made of polyacetal resin, but may be formed using other thermoplastic resin such as polyamide. Further, the shape of the clip 8 is not particularly limited, and the auxiliary plate portion 37 may be omitted or the umbrella portion 42 may be polygonal.

  (K) The method of heat welding is not limited to the above embodiment. For example, the clip 8 may be thermally welded by vibration welding, microwave welding, or the like after the molding of the weather strip body 7 to which the resin sheet 9 is welded.

  DESCRIPTION OF SYMBOLS 1 ... Automobile, 2 ... Body, 3 ... Door opening, 4 ... Door, 5 ... Door weather strip, 7 ... Weather strip main body, 8 ... Clip, 9 ... Resin sheet, 11 ... Mounting base, 11a ... Base Part, 12 ... main seal part, 51 ... concave part, DR ... retainer part.

Claims (5)

An opening base formed in a vehicle body, or a mounting base attached to a mounting portion formed at a peripheral edge of an opening / closing member that opens and closes the opening, and the opening / closing member closing the opening / closing member A weather strip main body made of a rubber material, comprising a seal portion for sealing between a peripheral portion of the opening and a peripheral portion of the opening and closing member;
A weather strip that is attached to the attachment base and is made of a thermoplastic resin material and includes a clip for attaching the weather strip body to the attachment portion.
At least sheet-like fixing means fixed to the mounting base so as to be interposed between the mounting base and the clip,
Of the fixing means, the surface on the mounting base side is composed of at least a thermoplastic material compatible with the weather strip body, and the surface on the clip side is composed of at least a thermoplastic material compatible with the clip. And
The weather strip, wherein the attachment base and the fixing means are thermally welded, and the fixing means and the clip are thermally welded.   The weather strip according to claim 1, wherein the fixing means is provided corresponding to a portion of the attachment base portion where the clip is provided.   The attachment base is formed with a recess at a portion to which the fixing means is fixed, and the fixing means is thermally welded to the recess not only on the surface facing the bottom surface of the recess, but also on the side surface. The weather strip according to claim 1 or 2.   The mounting base is formed with a recess at a portion where the fixing means is fixed, and the fixing means is such that the surface of the mounting base is thermally welded not only to the bottom surface of the recess, but also to the side surface. 3. The heat-welded not only to the portion thermally bonded to the bottom surface of the concave portion but also to the portion thermally bonded to the side surface of the concave portion of the fixing means. Weather strip. A method for producing a weather strip according to any one of claims 1 to 4,
An extrusion process for extruding the weatherstrip body;
A vulcanization step of vulcanizing the extruded weatherstrip body;
A fixing step in which the fixing means is thermally welded to the weather strip main body immediately after the vulcanization step using residual heat of the weather strip main body,
A method of manufacturing a weather strip, comprising: an attaching step of thermally welding the clip to a fixing means welded to a weather strip body.

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