JP5002200B2 - Glass run corner mold part structure - Google Patents

Description

  The present invention relates to a structure of a corner type molding portion of a glass run mounted on a door sash of an automobile, and in particular, a corner type of a glass run that is interposed between terminals of a general portion of a glass run and connects those general portions. This relates to the structure of the molded part.

  In this type of glass run, as is well known, a corner-shaped molded part is interposed between general parts having a substantially U-shaped cross section, and this corner-shaped molded part also has a U-shaped cross section like the general part. Therefore, the two general parts are connected to each other through a corner mold part so as to have an approximately L-shaped arrangement. In addition, the basic structure of such a glass run is described in patent document 1 and patent document 2, for example.

In addition, both the general portion of the glass run and the corner mold forming portion are formed with inner side (vehicle compartment side) and outer side (vehicle compartment outside) seal lips projecting obliquely inward at the opening edge of the U-shaped space. In addition, since each seal lip is formed to have a substantially arcuate cross section, when the door glass is received in the U-shaped space when the door glass is closed, both seal lips are door glass. The sealing performance is ensured by being bent and deformed by pressure contact or elastic contact.
JP 2002-187434 A Japanese Patent Laid-Open No. 2002-347445

  In such a conventional glass run structure, when the door glass is closed, the door glass is received in the U-shaped space, so that the seal lips on both the inner side and the outer side are pressed against or elastically contacted with the door glass and bent. The deformation is as described above. At that time, in particular, in the corner mold forming portion, the peripheral length of each seal lip is extended, and accordingly, each seal lip is simultaneously extended in the direction in which the lip length increases. On the other hand, since there is a limit to the amount of extension of each seal lip in the lip length direction, each seal lip follows the extension at the tip of the previous lip by increasing the curvature radius of the curved shape with a substantially arcuate cross section. Will do. Further, as described above, the curvature radius of the curved shape having a substantially arcuate cross section in each seal lip is increased because the wide range from the base side of the seal lip to the tip of the lip is pressed or elastically contacted with the door glass. On the other hand, the tendency of the seal lip to come into contact with the surface becomes strong, and the seal surface pressure is lowered, so that the sealing performance is likely to be lowered. Further, as described above, even the tip of the lip is pressed against or elastically contacted with the door glass, the lip tip may follow the movement of the door glass when the glass is opened, so that the so-called seal lip may be inverted.

  The present invention has been made paying attention to such a problem, and when the door glass is closed, in particular, the curved shape of the cross section of the seal lip has a substantially arcuate shape with respect to the extension of the circumferential length at the tip of the lip in the corner mold forming portion. It is an object of the present invention to provide a structure in which a follow-up change so as to increase the radius of curvature can be prevented in advance, thereby improving the sealing performance and preventing the reversal of the seal lip in the corner mold forming portion.

The invention according to claim 1 is a structure of a corner type molding part of a glass run that is interposed between terminals of the general part of the glass run and connects the general parts to each other. In addition, a sealing lip is formed at the opening edge of the molding body having a substantially U-shaped cross-section, projecting obliquely toward the inside of the U-shaped space, and curved in a substantially arcuate cross-section. the back is a by and seal lips protruding length single notch at a position corresponding to the distal end side than the middle portion of be formed, when receiving the door glass to the U-shaped space, the seal lip by tip is bent and deformed inwardly while away from the door glass as point bending notch, sealing lip is bent and deformed as the radius of curvature of the curved shape than the front door glass receptor is reduced, with it the notches Characterized in that the outer edges are adapted to contact the door glass.

In this case, as described in claim 2 , it is desirable that at least the depth of the notch is set so as to become larger as the part is farther from the terminal of the general part.

Further, in order to increase the reaction force of the seal lip on the premise that the front end of the seal lip is bent and deformed inwardly with the notch as a bending point, the seal lip as described in claim 3 is used. It is desirable that the front end of the seal lip is set so that the front end of the seal lip contacts the inner wall surface of the molded body when the front end of the seal lip is bent and deformed with the easily deformable portion as a bending point. .

  Therefore, in at least the invention described in claim 1, when the door glass is closed, the door glass is received in the U-shaped space of the corner-shaped molded portion, whereby the seal lips on both the inner side and the outer side are formed on the door glass. It is the same as in the prior art to bend and deform by pressure contact or elastic contact.

On the other hand, since the peripheral length on the tip side of each seal lip is extended at the corner mold forming part, each seal lip is simultaneously extended in the direction in which the lip length is increased. Since there is a limit to the amount of extension of the seal lip in the lip length direction, each seal lip will follow the extension on the lip tip side by bending the lip tip inward with the notch on the back as the bending point. Become.

The bending deformation of the lip tip with the notch as a bending point is not only the bending deformation of the curved shape of the curved shape of the cross section of the seal lip, but also the ridge line outside the notch is the door. Since the glass is pressed or elastically contacted, the sealing performance is improved without causing a reduction in the surface pressure, and at the same time, the reverse phenomenon of the seal lip can be prevented.
Further, in the invention described in claim 3 , by extending the tip of the seal lip, when the tip of the seal lip is bent and deformed inward with the notch as a bending point, the tip of the lip is formed on the mold body. Since the inner wall surface of the molded body is in contact with the inner wall surface and serves as a so-called backup for the tip of the seal lip, the reaction force of the seal lip when the outer ridge line of the notch is pressed against or elastically contacted with the door glass is further increased. Will be.

According to the first aspect of the present invention, since the tip end portion of the seal lip in the corner mold forming portion can be positively bent and deformed inward with the notch as a bending point, the ridge line on the outer side of the notch is the door glass. Therefore, the sealing performance is improved without causing a reduction in surface pressure, and at the same time, the reversal phenomenon of the seal lip can be prevented.

According to the second aspect of the present invention, since at least the depth of the notch is set so as to increase as the part farther from the end of the general part, the behavior of bending deformation of the seal lip with the notch as a bending point is stabilized. As a result, the continuity of the seal lip between the general part and the corner mold part can be reliably obtained.

  FIG. 2 and subsequent drawings show a more specific embodiment of the present invention. In particular, FIG. 2 shows a rear corner portion (D portion) of the glass run 2 attached to the front door 1 of the automobile shown in FIG. Details are shown.

  As shown in FIGS. 3 to 5 in addition to FIG. 2, the glass run 2 is along the roof-side glass run general part 4 and the sash vertical side part 3b along the sash upper side part 3a of the door sash as is well known. The glass run general portion 5 on the pillar side is connected to each other by a joint portion 6a having a corner-shaped molded portion 6 that is interposed between the terminals. The glass run general parts 4 and 5 are both extruded and have a uniform cross-sectional shape, and an inner side seal lip 7 and an outer side seal lip 8 project from the opening edge of a substantially U-shaped cross section. . And although the glass run general parts 4 and 5 are slightly different in cross-sectional shape, they are connected so as to be smoothly continuous with the corner-shaped forming part 6 interposed therebetween.

  As shown in FIG. 5, the corner mold forming part 6 has a substantially U-shaped mold forming main body part 9 substantially the same as the glass run general parts 4 and 5 as a main element at its opening edge and inside the U-shaped space. An inner side seal lip 7a and an outer side seal lip 8a that project obliquely toward the upper surface are integrally formed, and each of the seal lips 7a, 8a has a cross-sectional shape curved in a substantially bow shape. The outer surface is a sealing surface. When the inner side seal lip 7a and the outer side seal lip 8a are compared, the inner side seal lip 7a has a larger lip length than the outer side seal lip 8a.

Further, a notch 10 having a substantially semicircular cross section is formed as an easily deformable portion on the back surface of the inner seal lip 7a and at a position corresponding to the tip side of the intermediate portion of the lip protrusion length (lip length). The tip of the inner seal lip 7a is easily bent and deformed toward the inside, that is, toward the inner wall surface 9a of the molded body 9 with the notch 10 as a bending point.

  Here, the notch 10 is formed over the entire length of the inner seal lip 7a, but the effect of facilitating deformation by the notch 10 is larger as the portion is farther from the end of the glass run general portions 4 and 5 (joint portion 6a). Thus, the depth and the groove width of the notch 10 are set so as to gradually decrease toward the end of the glass run general portions 4 and 5. However, it is not necessary that both the depth of the notch 10 and the size of the groove width change, as long as at least the depth of the notch 10 is set to be gradually reduced toward the ends of the glass run general portions 4 and 5. It ’s enough.

  Therefore, according to the present embodiment, when the glass run 2 receives the door glass G in the U-shaped space when the door glass G is closed, the outer side seal lip 8a as shown in FIG. And the inner side seal lip 7a is bent and deformed from the base portion, and the respective seal lips 7a, 8a are brought into pressure contact or elastic contact with the door glass G.

  At this time, particularly when focusing on the inner side seal lip 7a, the circumferential length on the tip side of the inner side seal lip 7a is extended by pressure contact or elastic contact with the door glass G, and accordingly, the inner side seal lip 7a. However, the inner side seal lip 7a has a limited amount of extension in the lip length direction, so that the inner side seal lip 7a has a lip tip portion on the back surface. The notch 10 is bent at the inside, that is, as shown by an imaginary line Q1 in FIG. 5, the bending at the inner wall surface 9a side of the molded body 9 follows the extension on the lip tip side. .

The bending deformation of the lip tip portion with the notch 10 as a bending point is not only the bending deformation of the inner side seal lip 7a in the direction in which the curvature radius of the curved shape having a substantially arcuate cross section is reduced, but the notch on the seal surface . A ridge line that can be formed outside (a ridge line that can be bent and deformed with the notch 10 as a bending point on the outer surface serving as a sealing surface) is brought into pressure contact or elastic contact with the door glass G. As a result, the sealing performance is improved without reducing the surface pressure of the inner seal lip 7a with respect to the door glass G. Moreover, as is apparent from FIG. 5, the lip tip portion is bent and deformed in a direction away from the door glass G, so that the lip tip portion does not come into pressure contact or elastic contact with the door glass G. Therefore, from the state of FIG. Even if the opening operation of G is performed, the lip tip of the inner side seal lip 7a does not follow the movement of the door glass G, so that the so-called reverse phenomenon of the inner side seal lip 7a can be prevented. .

  Here, as described above, the depth and the groove width of the notch 10 are increased in the glass run general portion so that the effect of easy deformation by the notch 10 increases as the portion is farther from the end of the glass run general portions 4 and 5 (joint portion 6a). Since the inner side seal lip 7a is set so as to gradually become smaller toward the terminals 4 and 5, the portion farthest from the terminal (joint part 6a) of the glass run general parts 4 and 5 is bent and deformed from the notch 10. Then, other parts follow the bending deformation and bend and deform in the same manner. Further, since the degree of bending deformation from the notch 10 gradually increases from the portion near the end of the glass run general portions 4 and 5 (joint portion 6a), the inner side seal lip 7a is suddenly bent with respect to the general portion. Can be prevented.

  For reference, a conventional structure in which the notch 10 as the easily deformable portion is not formed is shown in FIG. In this case, the radius of curvature R2 of the seal surface of the inner seal lip 7a when the door is pressed or elastically contacted with the lath G is the seal of the inner seal lip 7a in a free state where the door glass G is not pressed or elastically contacted. It becomes larger than the curvature radius R1 of the surface. For this reason, the inner seal lip 7a tends to come into contact with the door glass G so that the sealing pressure is lowered, and at the same time the door glass G is opened when the door glass G is opened. As described above, there is a possibility that the so-called inner side seal lip 7a may be reversed due to the movement of the tip of the lip.

  As described above, according to the present embodiment, it is possible to expect the effect of improving the sealing performance of the inner side seal lip 7a and the effect of preventing the lip from being reversed simply by forming the notch 10 as the easily deformable portion.

  FIGS. 6 and 7 are views showing a second embodiment of the present invention, and the same reference numerals are given to the portions common to FIGS.

  In this second embodiment, as apparent from comparison with FIG. 5, the lip length of the inner side seal lip 7a is further extended from the tip position P of FIG. When the lip 7a is brought into pressure contact or elastic contact with the door glass G, the extension 7c at the tip of the inner side seal lip 7a is brought into contact with the inner wall surface 9a of the molded body 9.

  That is, according to the second embodiment, when the tip end portion of the inner side seal lip 7a is bent and deformed inwardly with the notch 10 being the easily deformable portion as a bending point, as indicated by a virtual line Q2 in FIG. Since the extension portion 7c of the lip tip abuts against the inner wall surface 9a of the molding body 9, the inner wall surface 9a of the molding body 9 serves as a so-called backup for the tip of the inner seal lip 7a. The reaction force of the inner side seal lip 7a when the outer ridge line of the bent portion is pressed or elastically contacted with the door glass G is further increased, which can contribute to improvement in sealing performance.

  Here, in each of the above embodiments, the case where the notch 10 which is the easily deformable portion is formed in the inner side seal lip 7a is illustrated, but the present invention can be similarly applied to the outer side seal lip 8a as needed. .

Side surface explanatory drawing of the principal part of a motor vehicle. FIG. 2 is a diagram showing a more specific first embodiment of the corner-type molding part structure of the glass run according to the present invention, and is an enlarged perspective view of a part corresponding to part D in FIG. 1. The expanded sectional view which follows the AA line of FIG. The expanded sectional view which follows the BB line of FIG. The expanded sectional view which follows the CC line of FIG. It is a figure which shows 2nd Embodiment of the corner type molding part structure of the glass run which concerns on this invention, and is an expanded perspective view of the D section equivalent part of FIG. The expanded sectional view which follows the CC line of FIG. It is a figure which shows the 2nd Embodiment of this invention, and sectional drawing of the site | part equivalent to FIG. Sectional drawing which shows the conventional structure of the site | part equivalent to FIG.

Explanation of symbols

2 ... Glass run 4 ... Grass run general part 5 ... Grass run general part 6 ... Corner mold forming part 7a ... Inner side seal lip 7c ... Extension part 8a ... Outer side seal lip 9 ... Mold molding main part 9a ... Inner wall surface
10 ... Notch G ... Door glass

Claims (3)

It is a structure of a corner type molding part of a glass run that is interposed between terminals of the general part of the glass run and connects the general parts,
The corner mold part is
A seal lip that protrudes obliquely toward the inside of the U-shaped space at the opening edge of the molding body having a substantially U-shaped cross section and is curved in a substantially arcuate cross section is formed. A single notch is formed on the back surface and at a position corresponding to the tip side from the middle portion of the seal lip protrusion length,
When receiving the door glass to the U-shaped space, that front end of the seal lip is bent and deformed inwardly while away from the door glass as point bending notches, seal lip above than the front door glass receptor A corner-shaped molded part structure of a glass run, wherein the curved radii of curvature are bent and deformed so that the outer ridge line of the notch is in contact with the door glass. 2. The glass run corner-shaped molded part structure according to claim 1, wherein at least the depth of the notch is set so as to be larger as the part is farther from the end of the general part. When the tip of the seal lip is extended and the tip of the seal lip is bent and deformed inward with the notch as a bending point, the tip of the lip is set to abut against the inner wall surface of the mold forming main body. The corner type molded part structure of a glass run according to claim 1 or 2.

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