JP2019156253A - Opening trim weatherstrip and production method thereof - Google Patents

Abstract

To provide an opening trim weatherstrip capable of suppressing wrinkles generated on a hollow seal part in a state of being assembled to a corner part of a vehicle body and a production method thereof.MEANS FOR SOLVING THE PROBLEM: An attachment base part 11 of an opening trim weatherstrip 1 is attached to a flange 2 of a vehicle body opening part through the nearly U shape cross-sectional attachment base part 11 formed of a vehicle outside side wall 11a, a vehicle inside side wall 11b, and a bottom wall 11b, and seals a space between the vehicle body opening part and a door by a hollow seal part 12 integrated to the attachment base part 11. In the attachment base part, a wire carrier 21 is embedded, the bottom wall 11c has a reinforcement part 30 formed of a hard resin harder than a material forming the attachment base part 11, and the reinforcement part 30 connects a space between wires of the wire carrier 21 along a longitudinal direction of the opening trim weatherstrip 1.SELECTED DRAWING: Figure 1

Description

The present invention relates to an automotive opening trim weather strip that is attached along the periphery of a door opening of a car body of an automobile and seals a gap between the car body and the door by elastic contact when the door is closed. It is related with the opening trim weather strip for motor vehicles which embed | buried the wire carrier in order to heighten, and its manufacturing method.

As shown in FIG. 4, the opening trim weatherstrip 1 for an automobile has a mounting base portion having a substantially U-shaped cross section comprising a vehicle outer side wall 11a, a vehicle inner side wall 11b, and a bottom wall 11c connecting both side walls 11a and 11b. 11 and a hollow seal portion 12 that is provided outside the mounting base 11 and integrated with the mounting base 11. Further, in order to hold the flange 2 of the vehicle body, a claw portion 13 elastically contacting the flange 2 provided inside the vehicle inner side wall 11b of the mounting base 11, and a vehicle outer side wall 11a of the mounting base 11 are provided. A plurality of protrusions 14 are provided. Further, a lip portion 15 is provided on the inner side of the mounting base portion 11.

A wire carrier 21 is embedded in the attachment base 11 as a core material (insert) in order to increase the rigidity of the attachment base 11. The wire carrier 21 is embedded along the longitudinal direction when the mounting base 11 is extruded.

  In order to reduce the weight, the above-described wire carrier 21 is formed by changing a conventional sheet metal into a heavy core material and forming a wave shape by continuously bending a single metal wire.

By the way, since the opening trim weatherstrip 1 is attached along the periphery of the door opening of the automobile body, the attachment base 11 is bent at the corner of the door opening of the automobile body according to the shape of the corner, At this time, there was a problem that wrinkles occurred in the hollow seal portion 12.

This is related to the bending moment accompanying the bending deformation of the mounting base 11, and the neutral shaft 200 of the wire carrier 21 passes through the hollow seal portion 12, and as a result, the tensile and compressive forces are separated from the neutral shaft 200 as a boundary. It is thought that wrinkles occurred in the compressed part. Here, the neutral axis means a surface that does not expand or contract when a bending moment is applied to the object, and is a term in material mechanics.

As a countermeasure against wrinkles occurring in the hollow seal portion 12 due to the bending deformation of the mounting base portion 11, as shown in FIG. 5, non-heat on the outside of the vehicle of the wire carrier 21 embedded in the opening seal (opening trim weather strip) 1 A point 51 on the inner peripheral side of the door at a base 12a on the inner side of the hollow seal portion 12 is formed from a bending start position 21c that forms the outer shoulder 21a of the wire carrier 21 in which the molten yarn 221 is bent in a substantially U shape. It arrange | positions in the range R1 to the drooping position 52, and the non-thermally melted yarn 221 inside the vehicle is bent from the bending start position 21e that forms the vehicle inner shoulder 21b of the wire carrier 21 to the vehicle inner side wall 11b at the base of the claw portion 13. It has been proposed to arrange the point 53 on the open end side in a range F1 up to a position 54 depending on the wire carrier 21.(See Patent Document 1)

In the above-mentioned Patent Document 1, with the above configuration, at least two non-thermal melt yarns 221 are provided on the vehicle exterior side and the vehicle interior side. When the door is closed from the vehicle inner side toward the vehicle outer side, the straight line 100 connecting the positions of the non-thermal melt yarns 221 is from the outer peripheral side to the inner peripheral side (from the opening side of the mounting base 11 to the bottom wall 11c side). Can be tilted over.

The position where the inclined straight line 100 is extended and intersected with the hollow seal portion 12 can be changed from the outer peripheral side of the door to the inner peripheral side (from the opening side of the mounting base 11 to the bottom wall 11c side). It is described that when the seal (opening trim weather strip) is assembled to the vehicle body side corner portion of the automobile, the region where the force contracting to the hollow seal portion acts becomes narrow and the occurrence of creases can be suppressed.

JP 2012-180002 A

However, Patent Document 1 focuses only on the position of the two non-heat-melting yarns 221 in the wire carrier 21, and the straight line 100 that mainly connects the two non-heat-melting yarns 221 passes through the hollow seal portion 12. However, when the mounting base 11 is bent and deformed in accordance with the shape of the corner, what kind of moment is generated in the wire carrier 21, and the wire carrier It is necessary to find where the neutral shaft 21 is located, and to discuss the presence or absence of tension and compression in the hollow seal portion 12 from the positional relationship between the neutral shaft and the hollow seal portion 12. Therefore, the countermeasure of Patent Document 1 is insufficient.

Therefore, the present invention is to provide an opening trim weather strip that can suppress wrinkles generated in a hollow seal portion particularly in a state where it is assembled to a corner portion of a vehicle body, and a manufacturing method thereof.

In order to solve the above-mentioned problem, the present invention of claim 1 is directed to a vehicle body opening through a mounting base having a substantially U-shaped cross section comprising a vehicle outer side wall, a vehicle inner side wall, and a bottom wall connecting both side walls. The opening trim weatherstrip is attached to the flange of the base plate and seals between the vehicle body opening and the door by a hollow seal portion integrated with the mounting base. The mounting base has a wire carrier embedded in the bottom wall. The reinforcing part is made of a hard resin compared to the material constituting the mounting base, and the reinforcing part is an opening trim connecting the wires of the wire carrier along the longitudinal direction of the opening trim weather strip. Weather strip.

According to the first aspect of the present invention, since the reinforcing portion made of a hard resin is formed on the bottom wall as compared with the material constituting the mounting base, the neutral axis of the wire carrier has the reinforcing portion. In the positional relationship between the wire carrier neutral shaft and the hollow seal portion, the wire carrier neutral shaft does not pass through the hollow seal portion. Generation of wrinkles in the hollow seal portion can be greatly suppressed. The tangent of the wire carrier embedded in the bottom wall refers to a straight line portion between the bending start position on the vehicle outer side wall side and the bending start position on the vehicle inner side wall side in the wire carrier embedded in the bottom wall. .

Further, when the mounting base is bent and deformed in accordance with the shape of the corner portion, the wave-shaped interval of the wire carrier 21 with respect to the longitudinal direction is maintained and is not compressed, so that bending deformation on the bottom wall of the mounting base is minimized. .

Furthermore, the reinforcing part is harder than the material constituting the mounting base and connects the wires of the wire carrier along the longitudinal direction of the opening trim weather strip, so the opening trim weather strip is extruded. In doing so, the shape of the wire carrier can be maintained, the rigidity of the mounting base after molding is maintained, and the assembly force to the flange is stabilized.

According to the present invention of claim 2, the reinforcing portion is an opening trim weather strip that connects substantially the center of the wire carrier embedded in the bottom wall. In the present invention of claim 2, since the reinforcing portion connects the substantially center of the wire carrier embedded in the bottom wall, the neutral axis of the wire carrier is located at the position of the tangent of the wire carrier embedded in the bottom wall. Almost matches. Therefore, in the positional relationship between the neutral axis of the wire carrier and the hollow seal portion, the neutral axis of the wire carrier does not pass through the hollow seal portion, and the occurrence of wrinkles in the hollow seal portion can be greatly suppressed.

  Here, substantially the center of the wire carrier embedded in the bottom wall is between the bending start position on the vehicle outer side wall side and the bending start position on the vehicle inner side wall side of the wire carrier embedded in the bottom wall. The center of the wire carrier.

  In addition, when the mounting base is bent and deformed according to the shape of the corner of the body, the reinforcing part does not cause a positional shift in the wire carrier and can maintain a strongly joined state. The effects of the invention can be obtained stably.

According to a third aspect of the present invention, the reinforcing portion is an opening trim weather strip in which only the portion embedded in the bottom wall of the wire carrier is connected. According to the third aspect of the present invention, since the reinforcing portion connects only the portion embedded in the bottom wall of the wire carrier, the neutral axis of the wire carrier is substantially the same as the tangent of the wire carrier embedded in the bottom wall. In addition, the generation of wrinkles in the hollow seal portion can be greatly suppressed.

Further, when the mounting base is bent and deformed, the corrugated wire carrier existing on the vehicle outer side wall and / or the vehicle inner side wall is not constrained and can be greatly deformed, so that corner followability is good.

The present invention of claim 4 is the opening trim weather strip in which the thickness of the reinforcing portion is 0.3 to 1.0 times the average thickness of the bottom wall. In this invention of Claim 4, since the thickness of a reinforcement part is 0.3 to 1.0 time with respect to the average thickness of an attachment base, compared with the case where a reinforcement part is formed with a thread | yarn or a wire It is strong against compressive stress, and the distance between the corrugated wire carriers is kept constant by the compressive stress at the time of bending and deforming the mounting base or at the time of extrusion molding.

In addition, when the ratio exceeds 1.0 times, there is a high possibility that the reinforcing portion may protrude from the bottom wall portion to impair the appearance, and a problem such as a crack occurring in the bottom wall portion from the protruding portion may occur. The average thickness of the bottom wall refers to the thickness of the bottom wall excluding the lip portion.

  Further, since the contact area with the rubber material forming the wire carrier and the bottom wall is large, the reinforcing portion does not cause misalignment in the bottom wall or the wire carrier when the mounting base is bent and deformed. The effect of can be stably obtained.

  The present invention of claim 5 is an attachment base portion having a substantially U-shaped cross section comprising a vehicle outer side wall, a vehicle inner side wall, and bottom walls connecting both side walls, and a wire carrier is embedded in the attachment base portion. The bottom wall is formed with a reinforcing portion made of a hard resin as compared to the material constituting the mounting base, and the reinforcing portion extends between the wires of the wire carrier along the longitudinal direction of the opening trim weather strip of the wire carrier. It is a manufacturing method of the opening trim weather strip which is connected, Comprising: A reinforcement part is a manufacturing method of the opening trim weather strip formed integrally with an attachment base by coextrusion after the formation of a wire carrier.

  In the present invention of claim 5, since the reinforcing portion is integrally formed with the mounting base portion by coextrusion after the formation of the wire carrier, the process is simplified and the manufacturing space can be reduced. In addition, the cost of the opening trim weather strip can be reduced.

Since the wire carrier is embedded in the mounting base of the opening trim weather strip and the bottom wall has a reinforcing portion made of a hard resin compared to the material constituting the mounting base, a neutral shaft of the wire carrier is formed. Is in the tangential direction of the wire carrier embedded in the bottom wall, does not pass through the hollow seal portion, and can greatly suppress the occurrence of wrinkles in the hollow seal portion.

Further, the reinforcing portion is harder than the mounting base, and connects the wires of the wire carrier along the longitudinal direction of the opening trim weather strip, so when extruding the opening trim weather strip, The shape of the wire carrier can be maintained, the rigidity of the mounting base after molding is maintained, and the assembly force to the flange is stabilized.

  Furthermore, since the reinforcing portion is formed integrally with the mounting base portion by coextrusion after the formation of the wire carrier, the process is simplified and the manufacturing space can be reduced. In addition, the cost of the opening trim weather strip can be reduced.

It is sectional drawing which shows the opening trim weather strip which is embodiment of this invention. It is a block diagram which shows the manufacturing process of the opening trim weather strip shown in FIG. FIG. 3 shows a state in each section shown in FIG. 2, (a) is a plan view and a sectional view of the wire carrier in section A, (b) is a sectional view of the wire carrier in section B, (c) Is a cross-sectional view of the opening trim in the section C, and (d) is a cross-sectional view of the opening trim weather strip in the section D. It is a figure which shows the relationship between the wire carrier in the conventional opening trim weather strip, and the neutral axis of a wire carrier. It is sectional drawing which shows the conventional opening trim weather strip (patent document 1).

  With reference to FIG.1 and FIG.3 (a), the opening trim weather strip 1 which concerns on embodiment of this invention is demonstrated. FIG. 1 is a cross-sectional view showing an opening trim weather strip 1 according to an embodiment of the present invention, and FIG. 3A is a plan view of the wire carrier 21 shown in FIG. . In addition, the same code | symbol was attached | subjected to the same part as what was shown in the prior art example.

The opening trim weather strip 1 according to the embodiment of the present invention mainly includes an attachment base portion 11, a hollow seal portion 12, a claw portion 13, a wire carrier 21, and a reinforcing portion 30.
The mounting base portion 11 has a substantially U-shaped cross section composed of a vehicle outer side wall 11a, a vehicle inner side wall 11b, and bottom walls 11c that connect both side walls 11a and 11b. FIG. 4 and FIG. In the same manner as described above, it is inserted into the flange 2 provided along the periphery of the door opening of the vehicle body and attached to the flange 2. In this embodiment, the mounting base 11 uses EPDM as a material. In addition, you may be comprised from another rubber material.

The hollow seal portion 12 bulges toward the vehicle outer side from the bases 12a and 12b protruding on the inner peripheral side and the outer peripheral side of the door on the vehicle outer side wall 11a of the mounting base portion 11. When the door is closed, the hollow seal portion 12 elastically contacts the door to seal the inside and outside of the vehicle. In the present embodiment, the hollow seal portion 12 is made of an EPDM sponge material. The hollow seal portion 12 may use a sponge material on the seal surface side and may use a solid material other than the seal surface side.

Further, the claw portion 13 is provided so as to extend from the inner side (the vehicle outer side) of the vehicle interior side wall 11 b of the mounting base portion 11 toward the vehicle outer side wall 11 a, and a plurality of the claw portions 13 are provided inside the vehicle outer side wall 11 a of the mounting base portion 11. The protrusion 2 is held in elastic contact with the flange 2 so as to sandwich the flange 2. On the other hand, a lip portion 15 is provided so as to extend from the bottom wall 11c to the inside of the vehicle. In the present embodiment, both the claw portion 13 and the projection portion 14 use EPDM.

As shown in FIG. 3A, the wire carrier 21 is formed into a wave shape by continuously bending a single linear wire core member 20, and is partially connected to the wire carrier 21, One non-heat-melting yarn 221 that suppresses the elongation in the longitudinal direction of the carrier 21 is attached to each symmetrical position with respect to the longitudinal direction of the wire carrier 21. In this embodiment, the wire carrier 21 uses an iron material having a diameter of 0.50 mm, and the non-thermally melted yarn 221 uses PET (polyethylene terephthalate).

The reinforcing portion 30 is formed on the bottom wall 11c of the wire carrier 21 embedded in the mounting base 11, and is substantially between the bending start position 21c on the vehicle outer side wall 11a side and the bending start position 21e on the vehicle inner side wall 11b side. Formed in the center. In the present embodiment, PP (polypropylene) is used as the hard resin that is the material of the reinforcing portion 30, and the size is 2 mm in thickness (t) and 4 mm in width (l). The hard resin is preferably PE (polyethylene), PA (polyamide), or PET (polyethylene terephthalate), more preferably PP or PE that can be heat-sealed to the mounting base, and most preferably PP.

According to the above, when the mounting base portion 11 of the opening trim weather strip 1 is bent and deformed at the corner portion of the door opening of the automobile body in accordance with the shape of the corner portion, the neutral shaft 200 of the wire carrier 21 is It almost coincides with the straight portion existing in the wire carrier 21 embedded in the bottom wall 11c. Therefore, in the positional relationship between the neutral shaft 200 of the wire carrier 21 and the hollow seal portion 12, the neutral shaft 200 of the wire carrier 21 does not pass through the hollow seal portion 12, and the generation of wrinkles in the hollow seal portion 12 is greatly suppressed. can do.

  Moreover, since the wire carrier 21 is arrange | positioned in the approximate center with respect to the thickness (t) direction of the reinforcement part 30, compared with the case where the reinforcement part 30 is adhere | attached or melt | fused with the wire carrier 21 surface. The wires of the wire carrier 21 can be more reliably connected.

Next, an example of a method for manufacturing the opening trim weather strip 1 shown in FIG. 1 will be described with reference to FIGS.
First, in the wire carrier (W / C) step, as shown in FIG. 3A, for example, the wire core material 20 and the non-thermally melted yarn 221 wound around a reel (not shown) are fed into the wire carrier supply device 41. In the wire carrier supply device 41, one wire core 20 is continuously bent to be processed into a corrugated wire carrier 21, and the wire carrier 21 is controlled in order to suppress the longitudinal extension of the wire carrier 21. The non-thermally melted yarn 221 and the wire carrier 21 are partially connected at a position symmetric with respect to the longitudinal direction of the wire and fed out from the wire carrier supply device 41.

  Next, in the pre-bending step, the wire carrier 21 partially connected by the non-thermally melted yarn 221 in the pre-bending device 42 is a dish-shaped cross section whose both ends are bent as shown in FIG. Shaped. In addition, you may make it the shape by which one end was bent rather than bending both ends.

Next, in the extrusion process, PP (polypropylene), which is a raw material of the reinforcing portion 30, and EPDM, which is a raw material of the attachment base portion 11 and the hollow seal portion 12, are supplied to the extruder 43 and pre-bend into a dish-like cross-sectional shape. The reinforcing part 30 is formed at a predetermined position with respect to the wire carrier 21 (FIG. 3B) and connects the wires of the wire carrier 21 along the longitudinal direction of the wire carrier 21, and the dish-shaped Along the wire carrier 21 pre-bent in the cross-sectional shape, that is, in a shape opened more than the substantially U-shaped cross-section, as shown in FIG. The part 13, the protrusion part 14, and the lip part 15 are extruded integrally.

  Here, the predetermined position with respect to the wire carrier 21 (FIG. 3B) pre-bended into a dish-like cross-sectional shape forming the reinforcing portion 30 is such that the attachment base 11 finally has a substantially U-shaped cross section. When the mounting base 11 is bent and deformed in accordance with the shape of the corner of the door opening of the automobile body, the neutral shaft 200 of the wire carrier 21 passes through the hollow seal portion 12. Among the wire carriers 21 embedded in the bottom wall 11c calculated in advance, the wire carrier 21 located between the bending start position 21c on the vehicle outer side wall side and the bending start position 21e on the vehicle inner side wall side. The position corresponding to the center.

  In the vulcanization process, the opening trim weatherstrip 1 is heat-treated in the vulcanizing furnace 44, whereby the rubber component is vulcanized and certain elasticity and strength are ensured. In the present embodiment, the non-thermally melted yarn 221 does not melt even if it passes through the vulcanizing furnace 44, and therefore remains after vulcanization.

  A take-off machine 45 is provided on the outlet side of the vulcanizing furnace 44, and is guided to the vulcanizing furnace 44 while pulling the wire carrier 21 pushed out together with the opening trim weather strip 1 from the extruder 43. At this time, the wire carrier 21 is formed with a reinforcing portion 30 for connecting the wires of the wire carrier 21 along the longitudinal direction of the wire carrier 21, so that the opening trim weather strip 1 can be pulled even when pulled by the take-up machine 45. It will not be stretched.

  Then, the vulcanized opening trim weather strip 1 is passed through the sizing die by the forming machine 46, and as shown in FIG. 3 (d), the opening is formed so that the mounting base 11 has a substantially U-shaped cross section. Narrowed. Then, a cooling process etc. are performed and the opening trim weather strip 1 is finally manufactured.

  The opening trim weatherstrip 1 manufactured as described above has an opening narrowed so that the mounting base 11 has a substantially U-shaped cross section, and is attached in accordance with the shape of the corner of the door opening of the automobile body. When the base portion 11 is bent and deformed, the reinforcing portion 30 is formed substantially at the center of the wire carrier 21 embedded in the bottom wall 11c, so that the neutral shaft 200 of the wire carrier 21 is embedded in the bottom wall 11c. It almost coincides with a straight line portion existing in the wire carrier 21 to be formed. Therefore, in the positional relationship between the neutral shaft 200 of the wire carrier 21 and the hollow seal portion 12, the neutral shaft 200 of the wire carrier 21 does not pass through the hollow seal portion 12, and the generation of wrinkles in the hollow seal portion 12 is greatly suppressed. can do.

  Moreover, since the reinforcement part 30 is integrally formed with the attachment base part 11 by coextrusion after the formation of the wire carrier 21, the process is simplified and the manufacturing space can be reduced. Moreover, the cost of the opening trim weather strip 1 can be reduced along with them.

In carrying out the present invention, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the object of the present invention.

For example, in this embodiment, the non-thermally melted yarn 221 that is partially connected to the wire carrier 21 and suppresses elongation in the longitudinal direction of the wire carrier 21 is used. A hot melt yarn melted in the furnace 44 may be used.

DESCRIPTION OF SYMBOLS 1 Opening trim weather strip, automotive opening seal 2 Flange 11 Mounting base 11a Car outer side wall 11b Car inner side wall 11c Bottom wall 12 Hollow seal part 12a Base 12b Base 13 Claw part 14 Protrusion part 15 Lip part 20 Wire core material 21 Wire carrier 21c Bending start position 21e Bending start position 30 Reinforcement part 41 Wire carrier supply apparatus 42 Prevent apparatus 43 Extruder 44 Vulcanizing furnace 45 Take-off machine 46 Forming machine 100 Straight line 200 Neutral shaft

Claims (5)

A hollow which is attached to the flange of the vehicle body opening through a mounting base having a substantially U-shaped cross section consisting of a vehicle outer side wall, a vehicle inner side wall and a bottom wall connecting both side walls, and integrated with the mounting base. An opening trim weatherstrip that seals between a vehicle body opening and a door by a seal part,
A wire carrier is embedded in the mounting base,
The bottom wall is formed with a reinforcing portion made of a hard resin compared to the material constituting the mounting base,
The opening trim weather strip, wherein the reinforcing portion connects the wires of the wire carrier along the longitudinal direction of the opening trim weather strip. The opening trim weather strip according to claim 1, wherein the reinforcing portion connects substantially the center of the wire carrier embedded in the bottom wall.   The opening trim weather strip according to claim 1 or 2, wherein the reinforcing portion connects only a portion embedded in the bottom wall of the wire carrier.   4. The opening trim weather strip according to claim 1, wherein a thickness of the reinforcing portion is 0.3 to 1.0 times an average thickness of the bottom wall. A mounting base portion having a substantially U-shaped cross section comprising a vehicle outer side wall, a vehicle inner side wall, and a bottom wall connecting both side walls;
A wire carrier is embedded in the mounting base,
The bottom wall is formed with a reinforcing portion made of a hard resin compared to the material constituting the mounting base,
The reinforcing portion is a manufacturing method of an opening trim weather strip that connects the wires of the wire carrier along the longitudinal direction of the opening trim weather strip of the wire carrier,
The method of manufacturing an opening trim weather strip, wherein the reinforcing portion is formed integrally with the mounting base portion by coextrusion after the formation of the wire carrier.

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