JP2018199429A - Weather strip for motor vehicle - Google Patents

Abstract

To provide a weather strip which achieves excellent assemblability, retention capability, and sealability even in a panel end part which forms an L shape by a tip flange part being formed in a standing manner.SOLUTION: A mold formation part 6 continuing into a general part in extruded form includes: a welt part 7A which is held in a fitting manner by an overlap flange part 19 having a tip flange part 18b; and a seal lip 8A. The welt part 7A is formed having a substantially deformed U shape cross section by a bottom wall part 9A and side wall parts 10A, 11A at both sides of the bottom wall part 9A, and the seal lip 8A is integrally formed at the outer side of the one side wall part 11A. The other side wall part 10A has: a bending wall part 20 which is erected from the bottom wall part 9A and has a crank shaped cross section; and an inclined wall part 24 which opens outward from the bending base part 20 to the open end side of a U shaped space and inclines.SELECTED DRAWING: Figure 5

Description

  [Technical Field] The present invention includes a weather strip for automobiles, in particular, a molded part continuously formed on an extruded general part, and the molded part is fitted to a body panel and a seal against a counterpart panel. The present invention relates to a weather strip for an automobile including a seal lip that functions as a portion.

  For example, as a weather strip for automobiles for the purpose of sealing between a wheel arch part of a rear fender part of an automobile and a rear door, those described in Patent Documents 1 and 2 have been proposed.

  The sealing member as a weather strip for automobiles described in Patent Document 1 is formed with a uniform cross-sectional shape in the longitudinal direction. However, as described in FIGS. There are some which are not of a uniform cross-sectional shape in the direction but are provided with a molded part formed by a mold forming method continuously to the extruded general part.

  And in the general part, the holding lip that fits and holds the end of the vehicle body panel is set on the inner peripheral side of the welt part that becomes the mounting base, while in the mold forming part, the holding lip is set due to manufacturing restrictions Therefore, instead of the holding lip, a thick block portion is formed on the inner peripheral side of the welt portion (see FIG. 4 of Patent Document 2).

JP 2009-29273 A JP 2008-213748 A

  However, as shown in FIG. 4 of Patent Document 2, when a thick block portion is formed on the inner periphery of the welt portion in the mold forming portion, “sinking” is likely to occur at the time of mold forming, and the appearance quality is improved. There is a problem that the assemblability (insertability) to the body panel side is poor depending on the shape of the end of the body panel.

  For example, there is a case where a front end flange portion is formed upright at an end portion of a vehicle body panel that is fitted and held by a welt portion, and the end portion of the panel is formed in an L shape due to a request in car body modeling (this panel end portion) (For example, refer to JP 2011-20649 A). In such a case, if a thick block part is formed on the inner periphery of the welt part, the welt part is forced open and assembled to the panel end part. In addition to being extremely deteriorated, the retainability after insertion is also deteriorated, and as a result, there is a possibility that the sealing performance is lowered by the seal portion. This tendency tends to become more prominent as the standing dimension of the front end flange of the panel end increases.

  The present invention has been made by paying attention to such a problem, and solves the problems of the prior art represented by Patent Documents 1 and 2, and in particular, the front end flange portion stands at the end portion of the vehicle body panel. Even if it is the case of the panel edge part which makes L shape by being formed, the weather strip for motor vehicles excellent in the assembly | attachment property, holding | maintenance property, and sealing performance is provided.

  In the present invention, a molded part is continuously formed and connected to the extruded general part, and the molded part has a panel end formed in an L shape by a standing flange part of the body panel being erected. A weather strip for an automobile including a welt portion fitted to and held by the portion and a seal lip that functions as a seal portion for the counterpart panel.

  In addition, the welt portion has a bottom wall portion and side wall portions on both sides thereof, the cross-sectional shape being formed in a substantially deformed U shape, and the seal lip is integrally formed on the outer side of one side wall portion. The other side wall portion is bent and formed so as to narrow an intermediate portion in the depth direction of the U-shaped space of the welt portion while rising from the bottom wall portion. An inclined wall portion that is inclined by opening outward is formed on the open end side.

  Preferably, as described in claim 2, the other side wall portion rises from the bottom wall portion and has a crank-like cross section so as to narrow an intermediate portion in the depth direction of the U-shaped space of the welt portion. A bent wall portion formed by bending and an inclined wall portion formed by inclining outwardly from an open end of the U-shaped space among the bent wall portions.

  More preferably, as described in claim 3, the bent wall portion includes a root wall portion rising from the bottom wall portion, an intermediate wall portion extending in parallel with the bottom wall portion from the root wall portion, and the intermediate wall portion. A narrowed wall portion extending from the wall portion to the open end side of the U-shaped space is bent into a crank shape in cross section, and the inclined wall portion is formed to extend from the tip of the narrowed wall portion. .

  In this case, as described in claim 4, the fine portion that elastically contacts the front-end flange portion of the vehicle body panel from the portion of the intermediate wall portion close to the base portion of the narrowed wall portion toward the bottom wall portion side. More preferably, a lip portion is formed.

  Similarly, more preferably, as described in claim 5, partition-shaped reinforcing ribs in a region surrounded by the intermediate wall portion, the narrowed wall portion, and the inclined wall portion of the bent wall portion. Is formed.

  According to the present invention, unlike the conventional thick portion, the other side wall portion of the welt portion is bent so as to narrow the middle portion in the depth direction of the U-shaped space of the welt portion itself. The assembling property when inserting and holding the vehicle body panel having the character-shaped panel end portion is good, and the retaining property and the sealing property after assembling are also good. In addition, since an inclined wall portion that is inclined by opening outward is formed on the open end side of the U-shaped space in the other side wall portion, the guiding effect by the inclined wall portion is exhibited when assembled to the vehicle body panel. In particular, even if the panel end of the vehicle body panel is L-shaped, it can be assembled without difficulty, and the assemblability becomes even better.

  According to the second aspect of the present invention, since the other side wall portion of the welt portion is formed as a bent wall portion having a crank-shaped cross section, the L shape of the panel end portion on the vehicle body panel side and the crank of the bent wall portion are provided. The shape matches, and the retainability after assembling to the panel end is further improved.

  In particular, according to the third aspect of the present invention, the bent wall portion is bent and formed in a cross-sectional crank shape by the base wall portion, the intermediate wall portion, and the narrowed wall portion. When held together, the angled inner corner formed by the general part of the panel end where the front end flange is formed upright and the front end flange is the same angle formed by the intermediate wall and the constricted wall The outer corners of these will match. In addition, the narrow wall portion is in surface contact with the general portion of the panel end portion, and the intermediate wall portion is in surface contact with the tip flange portion. Therefore, the retainability after assembling to the panel end is further improved.

  According to the invention described in claim 4, a fine lip portion that elastically contacts the front end flange portion of the vehicle body panel is formed from a portion of the intermediate wall portion close to the base portion of the narrowed wall portion toward the bottom wall portion side. Therefore, the intermediate wall portion is surely brought into elastic contact with the distal end flange portion via the lip portion, and the holding property and the sealing property after the assembly are further improved. In addition, since the lip portion is formed in a portion of the intermediate wall portion that is close to the root portion of the narrowed wall portion, it does not interfere with the front flange portion during assembly to the vehicle body panel, and hinders assembly. There is no.

  Further, according to the invention described in claim 5, since the partition wall-shaped reinforcing rib is formed in the region surrounded by the intermediate wall portion, the narrowed wall portion and the inclined wall portion in the bent wall portion, The welt part including the wall part is reinforced and the rigidity becomes high, and the holding ability and the sealing ability after the assembly are further improved. In addition, since the reinforcing rib is not a thick-walled block together with the bent wall portion, it is advantageous for preventing the occurrence of “sinking” during molding.

1 is a rear perspective view of an automobile to which an automobile weather strip according to the present invention is applied. The front view which extracted 1st Embodiment of the weather strip for motor vehicles based on this invention, and extracted only the weather strip for motor vehicles shown in FIG. The expanded sectional view along the AA line of FIG. 1 and FIG. The expanded sectional view along the BB line of FIG. The expanded sectional view along the CC line of FIG. FIG. 6 is a diagram showing a second embodiment of an automotive weather strip according to the present invention, and is an enlarged cross-sectional view of a portion equivalent to FIG. 5.

  1 to 5 show a more specific first embodiment for carrying out an automotive weather strip according to the present invention. FIG. 1 shows a rear side view of the automobile, and FIG. The front view which extracted only the weather strip (henceforth a weather strip) 4 only is shown. Further, FIG. 3 shows an enlarged cross-sectional view along the line AA of FIGS.

  Here, as shown in FIG. 1, when the rear door 3 serving as a counterpart panel is closed with respect to the vehicle body 1 of the automobile, which is disposed following the curvature of the wheel arch portion 2 a in the rear fender portion 2, the rear door 3 An example of the weather strip 4 is shown in which the inner surface of the arch portion at the rear end edge is elastically contacted or pressed while being superposed.

  As shown in FIGS. 2 and 3 in addition to FIG. 1, the weather strip 4 has a substantially long bar shape arranged along the curvature of the wheel arch portion 2a, and has a uniform cross-sectional shape in the longitudinal direction by extrusion molding. Molding as a terminal part that is formed by connection molding by a die molding so that the general part 5 formed as a continuous part is continuous with the general part 5 at the connection position 5a at the upper end of the general part 5 Part 6.

  As shown in FIG. 3, the general portion 5 shares a welt portion 7 having a substantially U-shaped cross section that functions as a mounting base portion and one side wall portion 11 on the outer side of the welt portion 7, which will be described later. In this way, a hollow seal lip 8 as a seal part integrally formed is formed as a main element.

  The welt portion 7 is formed in a substantially U-shaped cross section with a bottom wall portion 9 and vehicle interior and vehicle exterior side wall portions 10 and 11 facing each other on both sides of the bottom wall portion 9. In the welt portion 7, a metal or resin core 12 is embedded. A plurality of protrusions 13 are formed along the longitudinal direction on the inner surface of the side wall portion 11 on the vehicle outer side of the welt portion 7, and a holding lip 14 is formed on the inner surface of the side wall portion 10 on the vehicle inner side. It is formed to project diagonally.

  Further, a guard lip 15 is integrally formed on the outer surface of the bottom wall portion 9 in the welt portion 7. In the example of FIG. 3, the base portion of the seal lip 8 and the welt portion 7 including the guard lip 15 are formed of, for example, a solid rubber-based elastic body, and the remaining portion of the seal lip 8 is softer than the welt portion 7. It is made of a sponge-like rubber-based elastic body. Further, the guard lip 15 serves to suppress scattering of muddy water and the like.

  On the other hand, the molded part 6 connected to the general part 5 at the connection position 5 a in FIG. 2 is formed to have substantially the same cross-sectional shape as the general part 5. However, in the mold forming portion 6, the cross-sectional shape gradually changes so as to become smaller from the connection position 5 a and is fixed to the wheel arch portion 2 a by a clip (not shown) inserted into the clip hole 16 at the end. The At the same time, the core material 12 shown in FIG. The details of the mold forming part 6 will be described later.

  As shown in FIG. 3, the wheel arch portion 2 a to which the weather strip 4 is to be attached is an outer flange portion at the edge of the side outer panel 17 that is a part of the vehicle body panel forming the rear fender portion 2. 17a and the inner flange portion 18a at the edge of the wheel arch inner panel 18 which is also a part of the vehicle body panel, and are formed by the overlapping flange portion 19 integrated by welding joint such as spot welding. Yes.

  In the inner flange portion 18a on the wheel arch inner panel 18 side forming the overlap flange portion 19, the front end flange portion 18b is formed upright by bending the front end toward the inside of the vehicle at a substantially right angle. The front end portion of the inner flange portion 18a including the flange portion 18b is formed to be bent in an L shape.

  On the other hand, in the outer flange portion 17a on the side outer panel 17 side forming the overlapping flange portion 19, the tip flange portion 18b such as the inner flange portion 18a is not formed upright, and the bottom wall of the welt portion 7 is formed. The flange protrusion length toward the portion 9 side is set to be larger than the inner flange portion 18a.

  Then, the welt portion 7 is inserted into the overlapping flange portion 19 of the wheel arch portion 2a from the open side of the U-shaped space, and the outer flange portion 17a is butted against the inner bottom surface of the bottom wall portion 9 in the welt portion 7. Let The overlapping flange portion 19 is formed by the side wall portions 10 and 11 forming the welt portion 7 while pressing the plurality of protrusions 13 to the outer flange portion 17a and the holding lip 14 to the inner flange portion 18a. The weather strip 4 is firmly fitted and held and assembled to the wheel arch portion 2a.

  4 shows an enlarged cross-sectional view along the line BB of the molding part 6 shown in FIG. 2, and FIG. 5 shows an enlargement along the line CC of the molding part 6 shown in FIG. A cross-sectional view is shown.

  In the molding part 6 connected to the general part 5 shown in FIG. 2 at the connection position 5a, as in the general part 5, as shown in FIG. 4, the welt part 7A, the seal lip 8A and the guard lip 15A are provided. In the form of inclusion, it is formed with the same cross-sectional shape as the general part 5. However, as described above, the mold forming portion 6 gradually changes so that the cross-sectional shape gradually decreases as the distance from the connection position 5a increases. Further, in the molded part 6, unlike the general part 5, the entire molded part 6 including the seal lip 8A is formed of a solid rubber-based elastic body. Therefore, the seal lip 8A of the molded part 6 is formed thinner than the seal lip 8 on the general part 5 side formed of a sponge-like rubber-based elastic body.

  In the portion near the connection position 5a in FIG. 2 in the mold forming portion 6, as shown in FIG. 4, the cross-sectional shape is close to the cross-sectional shape of the general portion 5 shown in FIG. The retaining lip 14 shown in FIG.

  On the other hand, at the end portion relatively far from the connecting position 5a in FIG. 2 in the mold forming portion 6, as shown in FIG. 5, the shape of the welt portion 7A is particularly different from that shown in FIGS. Yes. A welt portion 7A of the mold forming portion 6 shown in FIG. 5 is continuous with the welt portion 7 on the general portion 5 side shown in FIG. It is formed as a thing.

  More specifically, as shown in FIG. 5, the welt portion 7A in the mold forming portion 6 is not only embedded with the core material 12 as shown in FIG. 3, but also the height of the side wall portion 11A outside the vehicle. The height of the inner side wall portion 10A is small. The vehicle interior side wall portion 10A includes a root wall portion 21 that rises in parallel with the vehicle exterior side wall portion 11A from the bottom wall portion 9A, and an intermediate wall portion that extends substantially parallel to the bottom wall portion 9A from the tip of the root wall portion 21. 22, a narrowed wall portion 23 that rises in parallel with the side wall portion 11 </ b> A on the vehicle outer side from the front end of the intermediate wall portion 22, and an inclined wall portion 24 that extends from the front end of the narrowed wall portion 23 in an outward opening direction. Is formed.

  A bent wall portion 20 bent in a so-called crank shape is formed by the three of the root wall portion 21, the intermediate wall portion 22, and the narrowed wall portion 23, and is inclined in the outward opening direction from the tip of the bent wall portion 20. The inclined wall portion 24 is formed to be extended. Among the bent wall portions 20, the narrow wall portion 23 in particular has a function of locally narrowing the intermediate portion in the depth direction of the U-shaped space of the welt portion 7A itself, thereby the depth of the U-shaped space. In the middle part of the direction, the distance between the side wall parts 10A and 11A is remarkably reduced.

  As a result, the portion corresponding to the bent wall portion 20 in the U-shaped space of the welt portion 7A has an L-shape so that the tip L-shape portion of the inner flange portion 18a including the tip flange portion 18b can be easily received. It has a shape that matches. The thickness of the bent wall portion 20 and the inclined wall portion 24 shown in FIG. 5 is set to be approximately the same as the thickness of the side wall portion 10 on the vehicle inner side in the general portion 5 shown in FIG.

  Further, in the concave space on the back side surrounded by the intermediate wall portion 22 of the bent wall portion 20, the narrowed wall portion 23, and the inclined wall portion 24, a partition-like reinforcement is formed in such a manner as to extend over these three portions. A plurality of ribs 25 are formed at a predetermined pitch in the longitudinal direction. Due to the reinforcing effect of the plurality of reinforcing ribs 25, the rigidity of the side wall 10A on the vehicle inner side is improved.

  4 and 5, the inner surface of the side wall portion 11A on the vehicle outer side in the molded portion 6 shown in FIGS. 4 and 5 has a plurality of continuous ridges 13 on the side wall portion 11 on the vehicle outer side on the general portion 5 side shown in FIG. A bead portion 13A is formed. Further, as shown in FIG. 5, a core punching hole for extracting a core for forming the hollow seal lip 8 </ b> A at the time of molding the mold is formed in the side wall portion 11 </ b> A on the vehicle outer side on the terminal side of the mold forming portion 6. 26 is inevitably formed.

  Therefore, according to the structure of the weather strip 4 configured as described above, the mold forming portion 6 shown in FIGS. 4 and 5 also opens the welt portion 7A in the same manner as the general portion 5 shown in FIG. Meanwhile, the overlapping flange portion 19 of the wheel arch portion 2a including the tip flange portion 18b is held by the welt portion 7A, and the welt portion 7A is inserted into the overlapping flange portion 19 from the open side of the U-shaped space. And by making the outer flange portion 17a butt against the inner bottom surface of the bottom wall portion 9A in the welt portion 7A, the overlapping flange portion 19 is sandwiched between both side wall portions 10A and 11A forming the welt portion 7A. The molded part 6 is firmly fitted and held.

  In this case, as shown in FIG. 5, the side wall portion 10A on the vehicle interior side of the welt portion 7A in the mold forming portion 6 has a crank shape so as to narrow the intermediate portion in the depth direction of the U-shaped space of the welt portion 7A itself. As described above, it is bent. Therefore, it is possible to easily hold the overlapping flange portion 19 including the tip flange portion 18b simply by elastically deforming the welt portion 7A so as to open, and when inserting and holding the wheel arch portion 2a, Excellent assembly performance.

  Further, the back side of the U-shaped space restricted by the crank-shaped bent wall portion 20 matches the L-shape of the inner flange portion 18a including the tip flange portion 18b, and the mold forming portion 6 is the wheel arch portion. When fitted and held on the overlapping flange portion 19 of 2a, an intermediate wall is formed at the inner corner portion of the angle formed by the general portion of the inner flange portion 18a and the distal end flange portion 18b. The same angle-shaped outer corner formed by the portion 22 and the constricted wall portion 23 is matched. In addition, the narrow wall portion 23 comes into surface contact with the general portion of the inner flange portion 18a, and the tip end of the tip flange portion 18b comes into contact with the inner surface of the root wall portion 21. Therefore, the retainability and position stability of the molded part 6 after assembly are excellent, and as a result, the sealing performance by the seal lip 8A is also good.

  Moreover, since an inclined wall portion 24 that is inclined outwardly from the bent wall portion 20 is formed on the open side of the U-shaped space in the welt portion 7A of the mold forming portion 6, it is inserted into the wheel arch portion 2a. Sometimes, the guiding effect of the overlapping flange portion 19 including the tip flange portion 18b by the inclined wall portion 24 is exhibited. Therefore, even if the overlapping flange portion 19 has an L-shaped portion including the tip flange portion 18b, the mold forming portion 6 can be assembled without difficulty to the overlapping flange portion 19, and the wheel arch portion 2a. The assembling property when inserting into the door is much better.

  Further, since the partition-like reinforcing rib 25 is formed in the space on the back side surrounded by the intermediate wall portion 22 and the narrowed wall portion 23 and the inclined wall portion 24 of the bent wall portion 20 in the side wall portion 10A on the vehicle interior side, The side wall portion 10A inside the vehicle including the bent wall portion 20 is reinforced and has high rigidity, and the holding property and the sealing property after assembly are further improved. In addition, since the reinforcing rib 25 is not a thick block shape together with the bent wall portion 20, the occurrence of “sinking” at the time of molding does not occur.

  FIG. 6 shows a cross-sectional view of a portion equivalent to FIG. 5 as the second embodiment of the weather strip according to the present invention. In FIG. 6, parts that are the same as those in FIG. 5 are given the same reference numerals, and redundant descriptions are omitted.

  In the second embodiment shown in FIG. 6, as is clear from the comparison with FIG. 5, the intermediate wall portion 22 that is a part of the bent wall portion 20 is a portion that faces the bottom wall portion 9 </ b> A and is narrowed. A minute lip portion 27 is formed to protrude toward the bottom wall portion 9 </ b> A at a portion close to the wall portion 23.

  According to the second embodiment, since the basic structure is the same as that shown in FIG. 5, it is possible to obtain the same effect as that of the first embodiment. is there.

  Further, in the regular assembly state as shown in FIG. 6, the intermediate wall portion 22 is surely brought into elastic contact with the front end flange portion 18 b via the lip portion 27, so that the overlapping flange portion 19 and the mold forming portion 6 The relative positioning accuracy is improved, and as a result, the holding property and the sealing property after assembly are further improved.

  Further, since the lip portion 27 is formed in a portion of the intermediate wall portion 22 that is close to the root portion of the narrowed wall portion 23, the lip portion 27 does not interfere with the front end flange portion 18 b when assembled to the overlapping flange portion 19. It does not hinder the assembling property when inserting into the arch portion 2a.

  Here, in each of the above-described embodiments, the weather strip 4 that is assembled to the overlapping flange portion 19 including the inner flange portion 18a and the outer flange portion 17a in which the tip flange portion 18b is erected is described as an example. The present invention can be applied even when the mating flange portion is only the inner flange portion 18a having the tip flange portion 18b.

  In the above embodiment, the weather strip 4 is mounted along the curvature of the wheel arch 2a and the seal lips 8 and 8A are hollow. However, the seal lip is hollow. Regardless of whether or not there is, the present invention can be applied to any kind of weatherstrip having at least the molded part 6.

DESCRIPTION OF SYMBOLS 1 ... Car body 2a ... Wheel arch part 3 ... Rear door (other party panel)
DESCRIPTION OF SYMBOLS 4 ... Automotive weather strip 5 ... General part 6 ... Molding part 7A ... Welt part 8A ... Seal lip 9A ... Bottom wall part 10A ... Side wall part 11A ... Side wall part 17A ... Outer flange part 18a ... Inner part Flange portion 18b ... tip flange portion 19 ... overlapping flange portion 20 ... bent wall portion 21 ... root wall portion 22 ... intermediate wall portion 23 ... constricted wall portion 24 ... inclined wall portion 25 ... reinforcing rib 27 ... lip portion

Claims (5)

The molded part is connected and formed continuously to the extruded general part,
The molded part includes a welt part fitted and held at an end of the L-shaped panel by forming the front end flange part of the body panel upright, and a seal lip that functions as a seal part for the counterpart panel; A weather strip for automobiles comprising:
The welt part has a substantially deformed U-shaped cross section at the bottom wall part and side wall parts on both sides thereof, and the seal lip is integrally formed on the outside of one side wall part,
The other side wall portion rises from the bottom wall portion and is bent so as to narrow an intermediate portion in the depth direction of the U-shaped space of the welt portion, and the open end side of the U-shaped space A weather strip for automobiles, characterized in that an inclined wall portion inclined by an outward opening is formed. The other side wall is
A bent wall portion formed to be bent in a crank-like cross section so as to narrow an intermediate portion in the depth direction of the U-shaped space of the welt portion while rising from the bottom wall portion;
An inclined wall portion formed by inclining outward from the open end of the U-shaped space among the bent wall portions;
The automobile weather strip according to claim 1, comprising: The bent wall portion includes a root wall portion rising from the bottom wall portion, an intermediate wall portion extending in parallel with the bottom wall portion from the root wall portion, and an open end side of the U-shaped space from the intermediate wall portion. The narrowed wall portion extends and is bent into a crank shape in cross section.
The automobile weather strip according to claim 2, wherein the inclined wall portion extends from a tip of the narrowed wall portion.   A minute lip portion that elastically contacts a front end flange portion of the vehicle body panel is formed from a portion of the intermediate wall portion close to a base portion of the narrowed wall portion toward the bottom wall portion side. The weather strip for automobiles according to claim 3.   5. A partition-like reinforcing rib is formed in a region surrounded by the intermediate wall portion, the narrowed wall portion, and the inclined wall portion in the bent wall portion. The weather strip for automobiles according to claim 1.

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