JP2008055978A - Corner molding part structure for weather strip - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure attaining enhancement of rigidity of a base part without causing trouble on setting of a core removal hole and core removal work using the core removal hole at the corner molding part, previously preventing deviation and floating up of the base part and attaining enhancement of water-tight property. <P>SOLUTION: The base part 5c is formed by a hard material, and a seal lip 6c and a sub-seal lip 7c other than it is formed by a soft material. The base part 5c formed with the core removal hole 10 is divided to left and right base pieces 11, both parts are connected to each other through a thin bridge part 13 at a distal end of a slit part 12 at one end, and both parts are mutually left by the released slit part 14 at the other end. A clip 9 is set on an auxiliary base part extended/formed from the base part 5c. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a corner type molded part structure of a weather strip for automobiles, and more particularly, to a weather strip for improving rigidity of a base part while improving workability of a core removing operation which is a special characteristic of the corner type molded part. The present invention relates to a corner type molded part structure.

  The base part (to the door sash) of the corner mold forming part of the corner mold forming part of an automobile weather strip is intended to improve the assembling property to the door sash and to improve the water tightness by preventing the slippage when the door is closed. Various techniques for increasing the rigidity of the portion to be a mounting base of the slab have been proposed.

For example, as described in Patent Document 1, in addition to the so-called insert metal embedded in the corner mold forming portion, the corner portion of the base portion of the corner mold forming portion is positioned more than other parts as described in Patent Documents 2 and 3. Those made of hard rubber or resin materials have been proposed. In particular, in the technique described in Patent Document 2, a clip to be inserted into a hole on the door sash side is formed integrally with a hard base part to prevent misalignment of the corner mold forming part. In the described technique, a corner-shaped molded portion is prevented from being lifted from the door sash by using a pressing plate formed integrally with a clip to be inserted on the door sash side.
Japanese Utility Model Publication No. 6-39538 Japanese Utility Model Publication No. 6-6046 JP 2003-112527 A JP 2004-98804 A

  However, in the techniques described in Patent Documents 1 and 4, an insert metal and a holding plate are essential as separate parts, and thus the cost is inevitably increased due to an increase in the number of parts. In particular, in the technique described in Patent Document 1, since it is necessary to set a core punching hole at a position avoiding the embedded insert metal, there is a concern that the base portion may be displaced or lifted when the portion is bent. However, there are still problems in improving water tightness.

  Further, in the techniques described in Patent Documents 2 and 3, since only a part of the base part of the corner-shaped molded part is formed of a hard material, the effect of improving the rigidity of the base part is not always sufficient, There is a possibility that the watertightness may be lowered due to the positional deviation or lifting of the base portion during bending.

  The present invention has been made paying attention to such problems, and it is difficult to set the core punching hole, which is the special feature of the corner mold forming part, and to perform the core punching operation using the core punching hole. The present invention provides a structure in which the rigidity of the base portion is improved without coming, thereby preventing the base portion from being displaced and lifted, and thus improving the water tightness.

  According to the first aspect of the present invention, there is provided a base-type molded portion structure in which the general portions of the weather strip are connected to each other, a base portion, a hollow seal lip formed integrally with the base portion, and a base It is premised on the structure of a corner type molded part having a core punched hole formed in the part.

  In addition, the base part of the corner mold part is made of a hard material and the parts other than the base part are made of a soft material, and the base part has its core hole so as to surround the core hole. The left and right base pieces that are formed in a substantially frame plate shape extending in the longitudinal direction of the weather strip while facing each other and facing the core punch hole in the base portion Are connected to each other through thin-walled bridge portions at one end in the longitudinal direction, and are separated from each other at the other end in the longitudinal direction.

  Therefore, in the first aspect of the present invention, since the entire base portion is hardened so as to surround the core punching hole, the rigidity of the entire base portion is increased. In addition, the base pieces on both sides of the core hole are connected by a thin bridge at one end and separated at the other end, so the core hole is widened when the core is extracted. This makes it easier to remove the core smoothly. Furthermore, since the base pieces on both sides of the core hole are connected to each other, it is possible to sufficiently counter the deformation in which both base pieces are in a so-called step difference.

  Preferably, as described in claim 2, at one end in the longitudinal direction connected to each other through the bridge portion among the core punching holes, the core punching hole has a slit portion with a minute gap. While converging and a bridge portion is formed at the end of the slit portion, the other end in the longitudinal direction that is spaced apart from each other among the core punch holes, the core hole is a slit with a minute gap It is assumed that the part is open.

  By adopting such a structure, when the base portion is attached to the door sash, the opposing surfaces forming the slit portion are abutted against each other, thereby further contributing to the improvement of the rigidity of the base portion.

  According to a third aspect of the present invention, on the premise of the second aspect, in at least any one of the slit portions at both ends in the longitudinal direction of the core hole, the base portion including the slit portion is formed from the direction perpendicular to the surface. When viewed, one of the two surfaces facing each other with a slit width is a convex portion, and the other is a concave portion that can be concavo-convexly fitted with the convex portion.

  According to a fourth aspect of the present invention, on the premise of the third aspect, in at least one of the slit portions at both ends in the longitudinal direction of the core punching hole, the base portion including the slit portion is disposed in the longitudinal direction. When viewed in a cross section perpendicular to the surface, one of the two surfaces facing each other with a slit width is a convex surface, and the other is a concave surface that can be engaged with the convex surface. .

  By adopting such a structure, when the opposing surfaces forming the slit portion are abutted with each other, the opposing surfaces are fitted with irregularities so that the positioning effect is exhibited and attached to the door sash. This makes it possible to prevent displacement at the concave-convex fitting portion in a state, and is particularly advantageous in preventing the base portion from being lifted off or detached from the door sash.

  According to a fifth aspect of the invention, on the premise of the description of any of the first to fourth aspects, the auxiliary base portion is extended from the base portion, and a clip is formed on a part of the auxiliary base portion. To do.

  Therefore, in the invention described in claim 5, since the clip functions as a fixing point for the door sash in addition to the base portion, it is advantageous in improving the fixing holding force of the corner type forming portion.

  According to the first aspect of the present invention, the rigidity of the entire base portion can be increased while accepting the setting of the core punching hole in the corner mold forming portion, so that the assembling property to the door sash is kept good. However, in particular, it is possible to prevent slippage at the time of bending deformation, to prevent lifting, and to prevent detachment from the door sash and to improve water tightness. Further, since the core punching hole formed in the hard base portion can be widened at the time of core extraction, the core extraction operation can be easily performed.

  According to invention of Claim 2, the slit part is formed in the both ends of a core punching hole, and the opposing surfaces which form the said slit part will be faced | matched at the time of the assembly | attachment to a door sash. Therefore, it becomes possible to further contribute to the improvement of the rigidity of the base portion, and there is no need to subsequently bond the opposing surfaces forming the core punching holes as has been practiced partially in the past.

  According to the third aspect of the present invention, since the opposing surfaces forming the slit portions can be so-called concavo-convex fitting, the opposing surfaces are arranged for the positioning effect when the opposing surfaces are brought into contact with each other. It is possible to prevent the displacement at the butt portion of the surface, and it is possible to prevent the base portion from being lifted or detached from the door sash.

  In particular, according to the invention described in claim 4, since the positioning effect by the uneven fitting in the three-dimensional direction is expected in the abutting portion between the facing surfaces forming the slit portion, the base portion from the door sash is expected. The effect of preventing the lifting and disengagement becomes even more remarkable.

  According to the fifth aspect of the present invention, since the clip is formed on the auxiliary base that is extended from the base portion, the fixing and holding force of the corner mold portion with respect to the door sash is further improved without increasing the number of parts. .

  1 to 7 show specific examples of the corner type molded part structure according to the present invention. In particular, FIG. 2 is a sectional view taken along the line AA of the weather strip 1 for a front door of an automobile shown in FIG. 4 is a cross-sectional view taken along line B-B. FIG. 4 is a rear corner portion of the weather strip 1 shown in FIG. The details of 1C are shown.

  As shown in FIGS. 2 to 4, the weather strip 1 is connected to each other by a joint line m having a corner-shaped molding portion 1 </ b> C in which a roof-side general portion Sr and a center pillar-side general portion Sp are interposed therebetween. Therefore, it is fitted and held around the door sash 2 shown in FIG. The roof-side general portion Sr including the door sash 2 has a cross-sectional shape as shown in FIG. 2, while the center-pillar-side general portion Sp including the door sash 2 has a cross-sectional shape as shown in FIG. It has become. As shown in FIGS. 2 and 3, a door glass run 3 different from the weather strip 1 is fitted and held on the inner periphery of the door sash.

  The roof side general portion Sr and the center pillar side general portion Sp are slightly different in cross-sectional shape as shown in FIGS. 2 and 3, but in addition to the base portion 5 serving as the mounting base and the hollow seal lip 6, the tongue piece The rear-side corner-shaped molded part 1C, which is common in that it is provided with a sub-seal lip 7 in the shape, is interposed between them, and the roof-side general part Sr whose cross-sectional shapes are different from each other. The center pillar-side general portion Sp is smoothly continued. Further, the center pillar side general portion Sp extends to the front side, and the front corner mold forming portion 1D similarly smoothly and smoothly connects the roof side general portion Sr and the center pillar side general portion Sp. The roof-side general portion Sr and the center-pillar-side general portion Sp are both extruded with a soft resin material such as sponge rubber or foamed TPO and having a uniform cross-sectional shape.

  On the other hand, as shown in FIGS. 6 and 7 in addition to FIG. 4, the corner mold forming portion 1C is provided with a base portion 5c, a hollow seal lip 6c, and a sub seal lip 7c. Although common to the pillar-side general portion Sp, the base 5c portion having a substantially frame plate shape is formed of a hard resin material, whereas the hollow seal lip 6c and the sub portion which are other portions are formed. The seal lip 7c is different from the roof side general portion Sr and the center pillar side general portion Sp in that the seal lip 7c is formed of a soft resin material. Further, as shown in FIG. 6, an auxiliary base portion 8 is formed to extend from the base portion 5c to the sub seal lip 7c side, and a clip 9 is integrally formed to protrude from the auxiliary base portion 8. Then, by simultaneously engaging the base portion 5c with the door sash 2, the clip 9 is engaged with the inner side of the door sash 2, thereby improving the fixing and holding force of the corner mold portion 5c with respect to the door sash 2. It has been. That is, as shown in FIG. 5, in the portion corresponding to the corner-shaped molded portion 5 c of the door sash 2, the retainer 2 a integrated with the door sash 2 is locally cut out to form a cutout portion 2 c. The fixing structure by the clip 9 serves to supplement the fixing holding force at the portion corresponding to the notch 2c.

  For example, PP (hardness is about JIS-R90) is used as the hard resin material, and TPO (hardness is about JIS-A40) is used as the soft resin material. In such a corner mold forming portion 1C, for example, after molding the base portion 5c using a hard resin material, the remaining seal lip 6c and sub seal lip 7c are molded using a soft resin material in the same mold. It is molded by the same technique as the so-called two-color molding method.

  Here, the corner mold forming part 1C is used in combination with a core for forming the hollow seal lip 6c, in particular, so as to connect the roof-side general part Sr and the center-pillar side general part Sp that are extruded as is well known. Since the die is molded, the base portion 5c is formed with an opening 10 along the longitudinal direction for extracting the core after molding.

  As is apparent from FIG. 4, the base portion 5 c surrounds the core punching hole 10, and the pair of left and right base element pieces 11, 11 forms the core punching hole 10 while the longitudinal direction of the weather strip 1. Although extending in the direction, the core punching hole 10 converges with a slit portion 12 of a minute gap formed between the base element pieces 11, 11 at one end in the longitudinal direction of the base portion 5c. On the other hand, a thin-walled bridge portion 13 is formed on the distal end side, and the left and right base element pieces 11 are connected to each other by the bridge portion 13, while at the other end in the longitudinal direction of the base portion 5 c The slit portion 14 of the minute gap formed between the pieces 11 and 11 is opened as it is, and the base element pieces 11 and 11 are substantially separated from each other.

  In addition, when the base portion 5c of the corner mold forming portion 1C is attached to the door sash 2 as shown in FIGS. 7A and 7B, the slit portions 12 and 14 at both ends in the longitudinal direction have the slit portion 12 thereof. The width dimension W is set in advance so that the opposing two surfaces forming the slit portions 12 and 14 are abutted with each other in order to close the minute gaps 14 and 14.

  Therefore, according to the structure of the weather strip 1 provided with the corner mold part 1C as described above, the base part 5c that functions as an attachment base of the corner mold part 1C with respect to the door sash 2 is formed of a hard resin material. Therefore, even if the core hole 10 is formed in the base portion 5c, the necessary and sufficient rigidity is obtained in the mounting state on the door sash 2, and even if the door portion is bent and deformed, the base portion 5c does not float from the door sash 2 and does not shift. In particular, when the base portion 5c is attached to the door sash 2, the slit portions 12, 14 at both ends of the core punching hole 10 are closed and the two opposing surfaces forming the slit portions 12, 14 are abutted. Since the clip 9 of the auxiliary base portion 8 extended from the base portion 5c is engaged with the door sash 2, these also improve the rigidity and further improve the fixing holding force of the corner mold forming portion 1C. It will be.

  In addition, even if the base portion 5c with the core hole 10 opened is formed of a hard resin material, the two base pieces 11, 11 forming the base portion 5c are thin at one end. Are connected at the other bridge portion 13 and are spaced apart at the other end, so that the core punching hole 10 can be greatly opened during the core punching operation from the corner mold forming portion 1C. The workability of the child extraction work is also improved.

  Further, since the two base pieces 11 and 11 forming the base portion 5c are connected to each other at the bridge portion 13, there is a shift that causes the base pieces 11 and 11 to be stepped at the time of bending deformation. It does not occur.

  Here, as shown in FIG. 8, when the end portion of one slit portion 12 in the G portion of FIG. 4 is formed into a round hole-shaped large diameter portion 12a having a larger diameter than that, the core is removed during the core removal operation. It becomes easier to open the hole 10, and the occurrence of tearing due to stress concentration can be prevented in advance.

  FIG. 9 shows a second embodiment of the invention and shows a modification of the slit portion 14 of FIG. 4 opened at the other end of the core punching hole 10.

  In the second embodiment, as shown in FIG. 9A, when the base portion 5c is viewed from the direction perpendicular to the surface, one of the two opposing surfaces forming the open slit portion 14A is selected. The base portion 5c is formed as a convex portion 15 having a convex shape toward the other side and the concave portion 16 having a V groove shape meshing with the convex portion 15 as shown in FIG. When the door sash 2 is mounted, the two are fitted in a concave-convex manner.

  In this case, the positioning effect due to the concave and convex fitting is exerted, and the positional deviation in the longitudinal direction of the base element pieces 11 and 11 forming the base portion 5c can be prevented in advance. It is possible to prevent the door sash 2 from being displaced or unexpectedly deformed when it is bent and deformed.

  FIG. 10 shows a third embodiment of the present invention, and shows a modified example of the slit portion 14 opened at the other end of the core punching hole 10 in FIG.

  In the third embodiment, in addition to the configuration of the second embodiment, when the base portion 5c including the slit portion 14B is viewed in a cross section perpendicular to the longitudinal direction, it is opposed with a slit width. When the base portion 5c is mounted on the door sash 2 with one of the two surfaces being a convex surface 17 having a mountain shape and the other being a V-shaped concave surface 18 that can mesh with the convex surface 17 Both are made to fit in the concave and convex portions.

  In the case of the third embodiment, the positioning effect by the uneven fitting is exhibited not only in the planar direction of the base portion 5c but also in the plate thickness direction of the base portion 5c, thereby forming the base portion 5c. Since the positional deviation in the three-dimensional direction between the base pieces 11 and 11 can be prevented in advance, the base portion 5c is lifted up or detached from the door sash 2 when the weather strip 1 is bent and deformed. It is more effective in preventing it.

  In the second and third embodiments, the concave / convex fitting structure is provided in the opened slit portion 14, but instead of the slit portion 14 or together with the slit portion 14 as necessary, the bridge portion 13. You may provide the said uneven | corrugated fitting structure in the slit part 12 of the side.

The schematic explanatory drawing of the whole weather strip provided with the corner type molding part which concerns on this invention. The expanded sectional view which follows the AA line of FIG. The expanded sectional view which follows the BB line of FIG. The perspective view which expanded the corner type molding part of the weather strip shown in FIG. The schematic perspective view of the corner part of the door sash corresponding to the corner type molding part of FIG. The expanded sectional view in the door sash mounting state along the CC line of FIG. (A) is an expanded sectional view in the door sash mounting state in alignment with the DD line of FIG. 4, The same figure (B) is sectional drawing in the free state before door sash mounting. FIG. 5 is an enlarged explanatory view showing a modification of the G part in FIG. 4. It is a figure which shows the 2nd Embodiment of this invention, (A) is principal part explanatory drawing which shows the modification of the open | release side slit part of FIG. 4, (B) is the state in the door sash mounting state of the part. FIG. It is a figure which shows the 3rd Embodiment of this invention, (A) is principal part explanatory drawing which shows another modification of the site | part equivalent to (A) of FIG. 9, (B) is a corner containing the site | part. Sectional drawing in the free state of a mold-molding part, The figure (C) is sectional drawing in the door sash mounting state of the corner type molding part of the figure (B).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Weather strip 1C ... Corner type molding part 2 ... Door sash 5c ... Base part 6c ... Seal lip 7c ... Sub seal lip 8 ... Auxiliary base part 9 ... Clip 10 ... Core hole 11 ... Base piece 12 ... Slit part DESCRIPTION OF SYMBOLS 13 ... Bridge part 14 ... Slit part 14A ... Slit part 14B ... Slit part 15 ... Convex part 16 ... Concave part 17 ... Convex surface 18 ... Concave surface Sr ... Roof side general part Sp ... Center pillar side general part

Claims (5)

A structure of a corner-shaped molded part connecting the general parts of the weather strip, a base part, a hollow seal lip formed integrally with the base part, and a core opening formed in the base part The structure of the corner mold part with holes,
The base part of the corner mold part is made of a hard material, and the parts other than the base part are made of a soft material.
The base portion is formed as a substantially frame plate-like one extending in the longitudinal direction of the weather strip while forming the core hole so as to surround the core hole,
The left and right base pieces facing each other across the core hole in the base portion are connected to each other via a thin bridge portion at one end in the longitudinal direction. A weather-strip corner molded part structure characterized in that the other end is spaced from each other. At one end in the longitudinal direction that is connected to each other through the bridge portion of the core punch hole, the core punch hole converges with a slit portion having a minute gap, and a bridge portion is formed at the end of the slit portion. While being formed
2. The weather strip according to claim 1, wherein the core hole is opened with a slit portion having a minute gap at the other longitudinal end of the core hole that is spaced apart from each other. Corner type molded part structure.   In at least one of the slit portions at both ends in the longitudinal direction of the core punching hole, either one of the two surfaces facing each other with a slit width when the base portion including the slit portion is viewed from the direction perpendicular to the surface. The corner-shaped molded part structure of a weather strip according to claim 2, wherein the convex part is a convex part, and the other is a concave part capable of engaging with the convex part.   Among at least one of the slit portions at both ends in the longitudinal direction of the core punch hole, when the base portion including the slit portion is viewed in a cross section perpendicular to the longitudinal direction, of the two surfaces facing with a slit width 4. The corner-shaped molded part structure of a weather strip according to claim 3, wherein either one is a convex surface, and the other is a concave surface capable of engaging with the convex surface.   5. The weatherstrip corner molded part structure according to claim 1, wherein an auxiliary base part is extended from the base part, and a clip is formed on a part of the auxiliary base part.

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