JP2012030754A - Mounting structure of welt and weather strip using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a welt mounting structure which achieves easy mounting and prevents coming-off.SOLUTION: While a plurality of mounting holes 21 are formed to penetrate in the longitudinal direction of the flange part 7 of a vehicle body side having a cross sectionally U-shaped welt part 9 fitted thereto, a plurality of locking projections 22 projecting toward the side wall 11 of the other from one side wall 10 of the welt part 9 are formed on the welt part 9 at a pitch corresponding to each mounting hole 21 of the flange part 7. The welt part 9 is expanded to cover the flange part 7, and one of the side wall 10 of the welt part 9 is turned to the flange part 7 around a thin film part 14 formed on the root part. The locking projections 22 are prevented from coming-off with the head part 25 of the locking projections 22, while inserting the locking projections 22 into each mounting hole 21 of the flange part 7.

Description

  The present invention relates to a mounting structure for a welt having a substantially U-shaped cross-section that is fitted and held in a flange portion on a vehicle body side, and a weather strip using the mounting structure.

  As is well known, for example, as a weather strip attached to the opening edge of a vehicle body side opening that is opened and closed by an automobile door or a weather strip attached to the lower edge of a window opening that is opened and closed by a door glass of an automobile door, Some of them are mounted on a flange portion on the vehicle body panel side or door panel side with a welt having a substantially U-shaped cross section as an attachment base. As this type of weather strip, for example, the one described in Patent Document 1 has been proposed.

  The weatherstrip described in Patent Document 1 is attached to the lower edge of a window opening in an automobile door, and has a substantially U-shaped cross section made of a metal material in a mounting portion that is a welt having a substantially U-shaped cross section. The core material is embedded, a tongue-like elastic holding piece is provided on the inner surface of one side wall of the mounting portion, and a protrusion is provided on the inner surface of the other side wall. And while sandwiching the flange part by the side of a door panel between the said elastic holding piece and a protrusion part, the said core material resists the lip reaction force based on the bending deformation of the said elastic holding piece, and the opening of the said mounting part Is to prevent.

JP 2006-298239 A

  By the way, in this type of weather strip, when the weather strip is mounted by pressing the mounting portion into the flange portion on the door panel side, the elastic holding piece is pressed while being bent and deformed, but the mounting workability is improved. Accordingly, when the cross-sectional shape of the core material is set so that the amount of deformation of the elastic holding piece in the weather strip mounting state, that is, the lip reaction force is relatively small, the fitting holding force of the mounting portion is reduced and the flange is reduced. It will be easy to drop off from the part. On the other hand, when the cross-sectional shape of the core material is set so that the amount of bending deformation of the elastic holding piece in the weatherstrip mounting state is relatively large in order to increase the fitting holding force of the mounting portion, naturally, When the mounting portion is pushed into the flange portion, a large pressing force is required, and the mounting workability with respect to the flange portion on the vehicle body side is reduced.

  In particular, when a metal core is used as in the weather strip described in Patent Document 1, not only does the weight of the weather strip increase, but other portions of the weather strip are flexible rubber or resin. Therefore, it is not preferable in terms of recyclability.

  The present invention has been made in view of such problems, and in particular, by making it possible to reliably prevent the welt from falling off from the flange on the vehicle body side without burying the core material in the welt. It is an object of the present invention to provide a welt attachment structure that achieves both ease of attachment and difficulty in detachment.

  According to the first aspect of the present invention, there is provided a welt attachment structure in which a welt having a substantially U-shaped cross section formed of a flexible material is attached to a flange portion on a vehicle body side. A mounting wall is formed on the side wall side of the welt with the flange portion sandwiched between the swing wall portion and the flange portion side. A plurality of locking projections projecting from the oscillating wall portion toward the flange side at a pitch corresponding to each mounting hole, and a retaining head formed at the tip of each locking projection Are formed on the welt side, and the rocking wall portion is swung to the flange portion side after the welt is put on the flange portion, so that each locking projection is fitted to each mounting hole on the flange portion side. Each inserted into Moni, is characterized by holding the flange between the head and the one side wall of each locking projection.

  Here, as is well known, since the welt is generally formed by extrusion, each locking projection including the head is formed of an extruded product having a uniform cross-sectional shape. Of these, the cross-sectional shape corresponding to each of the locking protrusions is cut out leaving the portion to be the locking protrusions, so that it is formed intermittently in the longitudinal direction of the welt. Desirable for improving productivity. In this case, after extruding an extruded product having a uniform cross-sectional shape including a cross-sectional shape corresponding to each locking projection, a part of the extruded product is notched as a secondary process after the extrusion. Each said latching protrusion is formed.

  Further, in order to improve the attachment workability of the welt, an easily deformable portion that becomes the center of the swing displacement is formed at the base portion of the swing wall portion as in the invention of claim 3. desirable.

  Further, in order to simplify the welt structure on the premise of the welt mounting structure according to claim 3, as in the invention according to claim 4, a corner portion formed by one side wall and the bottom wall of the welt. It is desirable that the easily deformable portion is formed so that one of the side walls can be oscillated and displaced as the oscillating wall portion. In this case, at the time of attaching the welt, the one side wall is swung toward the flange portion with the easily deformable portion as the center after the welt is spread and covered with the flange portion.

  Therefore, in at least the first aspect of the invention, the mounting operation of the welt can be completed only by swinging the movable wall portion toward the flange portion with the welt covered on the flange portion. After the welt is mounted on the flange portion, the welt is prevented from falling off by holding the flange portion between the head of each locking projection and the one side wall.

  Further, in order to enhance the sealing performance between the welt and the flange portion on the premise of the welt mounting structure according to any one of claims 1 to 4, the bottom wall of the welt is provided as in the invention according to claim 5. A pair of holding lips that extend from the side and the opening end side toward the inside of the welt and are opposed to each other with a predetermined distance are formed integrally with the welt. Are elastically in contact with the wall on the side, and each of the locking projections is inserted between the ends of the holding lips in addition to the mounting holes on the flange side, and the heads of the locking projections are It is desirable that it is prevented from coming off by being caught by the holding lip. That is, in the invention according to the fifth aspect, the holding lips are pressed against the flange portion between the head of each locking projection and the one side wall, and the gap between the both holding lips and the flange portion is between them. It will be sealed.

  Here, in the invention according to the fifth aspect, during the attachment work of the welt, each holding projection is inserted between the two holding lips while the two holding lips are expanded by the heads of the respective locking projections. Therefore, as in the invention described in claim 6, notches for facilitating the bending deformation in the direction away from the flange portion are formed on both holding lips, respectively, and each pressing force is reduced with a smaller pressing force at the time of attaching the welt. It is desirable to allow the locking projection to be inserted between both holding lips.

  On the other hand, in the case of attaching more importance to the attachment workability of the welt, on the premise of the attachment structure of the welt according to any one of claims 1 to 4, as in the invention of the invention of claim 7, It is desirable that the heads of the respective locking protrusions are prevented from coming off by being caught with the flange portions. In other words, according to the seventh aspect of the present invention, since the head of each locking projection is caught by the relatively rigid flange portion, the swing wall portion is attached to the flange portion to attach the welt. In addition to making it easier for the operator to sense the so-called moderation feeling when the head of each locking projection gets over each mounting hole on the flange side when swinging to the part side, the above-mentioned claim In comparison with the inventions described in Items 5 and 6, the pushing amount when each locking projection is inserted into each mounting hole on the flange portion side is reduced.

  Here, in the attachment structure of the welt according to any one of claims 5 to 7, a space for inserting the head of each locking projection is formed between the other side wall and the flange. Therefore, for example, in order to prevent the other side wall from vibrating when the vehicle is running or when the automobile door is opened or closed, the inner surface of the other side wall is connected to the inner surface of the other side wall as in the invention described in claim 8. It is desirable to back up the other side wall with the heads of the respective locking protrusions by bringing the heads of the stop protrusions into contact with each other.

  On the other hand, the pitch corresponding to each mounting hole on the flange side of the other side wall of the welt, as in the invention according to claim 9 on the premise of the mounting structure of the welt according to any one of claims 1 to 4 A plurality of through holes are formed, and each locking projection is inserted through each of the through holes in addition to each mounting hole on the flange side, and the head of each locking projection is connected to the other side wall. It may be prevented from coming off with the hook. According to the ninth aspect of the present invention, the opening of the welt is prevented by the catch between the head of each locking projection and the other side wall.

  The invention according to claim 10 is a weather strip that is mounted on a flange portion on the vehicle body side with the mounting structure according to any one of claims 1 to 9, and is a seal that elastically contacts a mating member. The lip protrudes from the outer surface of the other side wall.

  In the invention according to claim 10, by holding the flange portion between the head of each locking projection and the one side wall, the opening of the one side wall is prevented, while the seal The opening of the other side wall of the welt is prevented by the lip reaction force based on the elastic contact of the lip with the other member.

  According to the first aspect of the present invention, the welt can be easily attached to the flange portion by simply swinging the movable wall portion toward the flange portion with the welt covered on the flange portion. By holding the flange portion between the head of the locking protrusion and the one side wall, it is possible to reliably prevent the welt from falling off without using a core material that has been required in the past. This makes it possible to achieve both the attachment workability of the welt and the difficulty of detachment.

  According to the second aspect of the present invention, since each of the locking projections including the head is formed as a uniform cross-sectional shape in the longitudinal direction of the welt, extrusion is performed as a secondary process after extrusion. By cutting out a part of the molded product, a welt can be easily formed, and the productivity is improved.

  According to the third aspect of the present invention, during the operation of attaching the welt, by rotating the swing wall portion around the easily deformable portion, each of the locking protrusions is attached to each mounting hole on the flange portion side. Therefore, the attachment work of the welt to the flange portion can be performed more easily and reliably.

  According to the fourth aspect of the present invention, there is an advantage that the structure of the welt is simplified and the cost becomes advantageous.

  According to the fifth aspect of the present invention, since both holding lips are interposed between the head of each locking projection and the flange portion, the sealing performance is improved by the elastic contact between the both holding lips. Of course, there is an advantage that it is possible to flexibly cope with a change in the thickness of the flange portion by bending deformation of both holding lips.

  According to the sixth aspect of the present invention, when the heads of the respective locking projections are pushed between the tips of the two holding lips to attach the welt to the flange, the two holding lips are separated from the flange. Since the head of each locking projection can be inserted between the holding lips with a smaller pressing force by bending and deforming in the direction, there is an advantage that the workability of attaching the welt is further improved.

  According to the seventh aspect of the present invention, it is easy to detect by the operator's response that the heads of the respective locking projections have passed over the respective mounting holes on the flange portion side during the mounting operation of the welt. Compared with the inventions described in claims 5 and 6, since the pushing amount when inserting the respective locking projections into the respective mounting holes on the flange portion side is reduced, the mounting workability of the welt is further improved. It will be.

  According to the eighth aspect of the present invention, by backing up the other side wall with the head of each locking projection, it is possible to prevent the generation of noise due to the vibration of the other side wall.

  According to the ninth aspect of the present invention, the opening of the both side walls of the welt is prevented by the catch between the head of each locking projection and the other side wall, so that the welt is more easily removed. It can be surely prevented.

  According to the invention described in claim 10, the opening of the one side wall is prevented by holding the flange portion between the head of each locking projection and the one side wall. Since the lip reaction force based on the elastic contact of the seal lip with the mating member prevents the opening of the other side wall of the welt, the welt can be more reliably prevented from falling off.

The side view which shows the front door of a motor vehicle as the 1st Embodiment of this invention. Sectional drawing along the AA line of FIG. Sectional drawing along the BB line of FIG. The perspective view which shows the principal part of the weather strip shown to FIG. The figure which shows the modification of 1st Embodiment. The side view which shows the vehicle body of a motor vehicle as the 2nd Embodiment of this invention. Sectional drawing along CC line of FIG. Sectional drawing along the DD line | wire of FIG. The perspective view which shows the weather strip of FIG.

  1 to 4 show an example in which a welt mounting structure according to the present invention is applied to a weather strip mounted on a front door of an automobile as a preferred first embodiment of the present invention. 1 is a side view showing a front door of an automobile to which a welt mounting structure according to the present invention is applied, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 3 is BB in FIG. FIG. 4 is a perspective view showing a main part of the weather strip shown in FIGS.

  As shown in FIG. 1, a front door 1 that is an automobile door has a side surface that forms a window opening 1 a between a door body 2 that houses a window regulator (not shown) and a waist portion 2 a of the door body 2. The window opening 1a is a so-called sash door having a generally arched sash 3 and is opened and closed by a door glass 4 that can be moved up and down.

  As shown in FIG. 2 in addition to FIG. 1, a door inner panel 5 and a door outer panel 6 formed of a metal material are formed on the lower edge of the window opening 1 a of the front door 1, that is, on the waist 2 a of the door body 2. An upward flange portion 7 is formed along the longitudinal direction of the vehicle body. A weather strip 8 that seals between the flange portion 7 and the door glass 4 while concealing the flange portion 7 is attached to the flange portion 7 on the vehicle body side as the fitting holding portion. . The weather strip 8 is a long one formed by a known extrusion method.

  As shown in FIGS. 2 and 3, the weather strip 8 is formed around a welt portion 9 as a mounting base portion that fits into the flange portion 7. The welt portion 9 is connected to the upper end portions of the pair of side walls 10 and 11 facing each other in the vehicle interior / external direction with the bottom wall 12 interposed between them, so that the position facing the bottom wall 12 is opposed. The opening 13 has a substantially U-shaped cross section, and is formed as a so-called core-less structure having a solid olefinic thermoplastic elastomer (TPO or TPV) which is a flexible material.

Further, at the corner portion formed by the side wall 10 and the bottom wall 12 outside the passenger compartment, a thin portion 14 having a notch formed in the inner surface is provided with a low rigidity portion having a lower rigidity than other portions of the welt portion 9 or It is formed as an easily deformable part. Thereby, the side wall 10 outside the passenger compartment of the welt part 9 functions as a swinging wall part that can swing in the contact / separation direction with respect to the flange part 7.
On the outer surface of the side wall 11 on the vehicle interior side of the welt portion 9, tongue-like seal lips 15 and 16 that extend obliquely upward and elastically contact the door glass 4 that is the counterpart member are formed in two upper and lower stages. Has been. Both the seal lips 15 and 16 are formed of sponge-like olefin-based thermoplastic elastomer (TPO or TPV) which is a flexible material softer than the welt part 9.

  A pair of holding lips 17 and 18 project from the bottom wall 12 side and the opening 13 side of the welt part 9 toward the inside of the welt part 9, while the welt part 9 has side walls outside the vehicle compartment. On the inner surface 10, two upper and lower holding beads 19 and 20 are formed. Both holding lips 17, 18 are formed at a predetermined distance from the side wall 11 on the vehicle interior side of the welt portion 9, and both the holding lips 17, 18 and both holding beads 19, 20 are connected to each other. By sealingly contacting the flange portion 9 by elastic contact with both front and back surfaces of the flange portion 7, the gap between the welt portion 9 and the flange portion 7 is sealed. Both holding beads 19 and 20 are made of the same material as both seal lips 15 and 16, while both holding lips 17 and 18 are made of the same material as the welt portion 9.

  One holding lip 17 extending upward from the opening 13 side of the welt portion 9 out of the both holding lips 18 and 19 is directed from the tip of the side wall 11 on the vehicle interior side toward the flange portion 7 side in the welt portion 9. It has a substantially L-shaped cross section including a wall-like base end portion 17b that extends and a tongue-like lip main body 17c that extends upward from the tip of the base end portion 17b. The other holding lip 18 is a tongue-like piece projecting downward from a position facing the lip body 17b of one holding lip 17 of the bottom wall 12 of the welt part 9, The front ends of the holding lips 17 and 18 are opposed to each other with a predetermined interval. And the notch 17a, 18a for making the bending deformation of the direction away from the flange part 7 easy is provided in the contact surface with respect to the flange part 7 among both holding lips 17 and 18, respectively.

  On the other hand, as shown in FIGS. 1 and 2, a plurality of mounting holes 21 having a substantially rectangular shape in side view extending in the longitudinal direction of the flange portion 7 are formed in the flange portion 7 at equal pitches in the longitudinal direction of the flange portion 7. As shown in FIGS. 2 and 4, a plurality of locking projections projecting from the region between both holding beads 19, 20 toward the side wall 11 on the vehicle interior side of the side wall 10 on the vehicle exterior side of the welt portion 9. 22 are inserted into the respective mounting holes 21 on the flange portion 7 side. The weather strip 8 is positioned relative to the flange portion 7 by holding the flange portion 7 between the head portion 25 described later and the side wall 10 outside the passenger compartment among the locking projections 22. The falling off from the flange portion 7 is prevented.

  Here, after each extrusion projection of a uniform cross-sectional shape including a cross-sectional shape corresponding to each of the engagement protrusions 22 is extruded, each engagement protrusion 22 of each of the extrusion projections 22 Is formed by cutting out a portion having a cross-sectional shape corresponding to the above, leaving portions to be the respective locking projections 22 in the longitudinal direction. That is, as shown in FIG. 3, in the longitudinal direction region where the mounting hole 21 does not exist on the flange portion 7 side of the welt portion 9, the cross-sectional portion corresponding to each locking projection 22 in the extruded product. By notching, the interference between each locking projection 22 and the flange 7 is avoided. As a result, as shown in FIG. 4, the locking projections 22 are intermittently formed at a pitch corresponding to the mounting holes 21 on the flange portion 7 side in the longitudinal direction of the welt portion 9.

  As shown in FIGS. 2 and 4, each locking projection 22 is formed in a shape that matches each mounting hole 21 on the flange portion 7 side, and a base 23 that fits into each of the mounting holes 21, and its base 23 extending toward the side wall 11 on the vehicle interior side and passing between the tips of the holding lips 17, 18, and formed at the tips of the legs 24, the opening direction of the welt portion 9 Each holding lip 17, 18 and a head 25 having a substantially triangular cross section or a substantially arrow-shaped cross section, which are in a hooked relationship, and each of the flange 7 side as a uniform cross-sectional shape in the longitudinal direction of the weather strip 8. They are formed intermittently at a pitch corresponding to the mounting holes 21. Each locking protrusion 22 is formed of the same material as the welt portion 9.

  Further, the head 25 of each locking projection 22 has a pair of upper and lower locking surfaces 25a, 25b facing the flange 7 side. Both the locking surfaces 25a and 25b have a substantially arcuate cross section that protrudes toward the flange portion 7, and both the locking surfaces 25a and 25b abut against the tips of the holding lips 17 and 18, respectively. Yes.

  That is, the weather strip 8 is relatively positioned in the longitudinal direction and the vertical direction with respect to the flange portion 7 by fitting between the base portion 23 of each locking projection 22 and each mounting hole 21 on the flange portion 7 side, The head portions 25 of the locking projections 22 inserted into the space between the holding lips 17 and 18 and the side wall 10 outside the vehicle compartment abut against the inner surface of the side wall 11 on the vehicle interior side of the welt portion 9. The side wall 11 is backed up, and the locking projections 22 are prevented from coming off to prevent the welt 9 from opening.

  Therefore, when the weather strip 8 configured as described above is attached to the flange portion 7, first, the weather strip 8 shown in phantom lines in FIG. In a state where the welt portion 9 is spread apart from the side wall 11, the flange portion 7 is covered with the welt portion 9 from above while avoiding interference between the locking projections 22 and the flange portion 7. As indicated by an arrow E in FIG. 2, the side wall 10 outside the passenger compartment is rotated toward the flange portion 7 around the thin portion 14 of the welt portion 9. As a result, each locking projection 22 is inserted between each mounting hole 21 and both holding lips 17, 18 on the flange portion 7 side, and the head 25 of each locking projection 22 is connected to both holding lips 17, 18. Is pushed into the space between the vehicle interior side wall 11 and the weather strip 8 is attached.

  More specifically, an operator who attaches the weather strip 8 to the flange portion 7 covers the both side walls 10 and 11 together with his / her hands or a jig (not shown) after covering the flange portion 7 with the welt portion 9 in a free state. In this way, one end in the longitudinal direction of the welt portion 9 is clamped and the hand or jig is slid toward the other end in the longitudinal direction of the welt portion 9 to hold both the heads 25 of the respective locking projections 22. The lips 17 and 18 are sequentially pushed into the space between the vehicle interior side wall 11.

  At this time, since both holding lips 17 and 18 are easily bent and deformed in the direction away from the flange portion 7 by the notches 17a and 18a, the force for clamping the welt portion 9 is relatively small. However, the head 25 of each locking projection 22 spreads both the holding lips 17 and 18 in contact with the inclined surfaces of the both holding lips 17 and 18, and both the holding lips 17 and 18 and the side wall on the vehicle interior side. 11 will enter the space between. Thereby, the weather strip 8 is reliably attached to the flange portion 7.

  Therefore, according to the present embodiment, the welt portion 9 has a core-less structure due to the catch between the head 25 of each locking projection 22 and the holding lips 17 and 18, and the opening of the welt portion 9 is opened. Therefore, it is possible to satisfy both ease of attaching the weather strip 8 and difficulty of detachment.

  In addition, the recyclability is improved by eliminating the core material that has been embedded in the welt part, and there is an advantage that the weather strip 8 is lightened.

  In addition, by forming the notches 17a and 18a in the holding lips 17 and 18, respectively, the head 25 of each locking projection 22 can be inserted between the holding lips 17 and 18 with a relatively small pressing force. Thus, there is an advantage that the workability of attaching the weather strip 8 is further improved.

  Furthermore, since both holding lips 17 and 18 are interposed between the head 25 of each locking projection 22 and the flange portion 7, the thickness of the flange portion 7 can be increased by the deformation of both holding lips 17 and 18. It can respond flexibly to changes.

  In addition, the side wall 11 on the vehicle interior side is backed up by the head 25 of each locking projection 22 to prevent vibration of the side wall 11 on the vehicle interior side when the front door 1 is opened and closed or when the vehicle is running. Generation of abnormal noise from the side wall 11 can be prevented.

  In the first embodiment, an example in which the present invention is applied to a front door of an automobile is shown. However, it goes without saying that the present invention can be similarly applied to a rear door of an automobile.

  FIG. 5 is a view showing a modification of the first embodiment shown in FIGS. 1 to 4, and is a cross-sectional view corresponding to FIG. 2 in the first embodiment. In FIG. 5, parts that are the same as or correspond to those in the first embodiment shown in FIGS.

  In the modification shown in FIG. 5, a plurality of through holes 28 a are formed on the side wall 28 on the vehicle interior side of the welt portion 27 of the weather strip 26 at a pitch corresponding to each mounting hole 21 on the flange portion 7 side. The leg portions 30 of the respective locking projections 29 are extended so that the locking projections 29 are inserted through the respective through holes 28a. That is, the head 31 of each locking projection 29 is engaged with the outer surface of the side wall 28 on the vehicle interior side, and the head 31 of each locking projection 29 and the side wall 28 on the vehicle interior side are caught. By opening each locking projection 29, the opening of the welt portion 27 is prevented. The work of attaching the weather strip 26 to the flange portion 7 is performed in the same manner as in the first embodiment described above.

  Therefore, according to this modification, it is possible to obtain substantially the same effect as that of the first embodiment described above, and the head 31 of each locking projection 29 is located on the vehicle interior side of the welt portion 27. There is an advantage that the weather strip 26 can be more reliably prevented from falling off by preventing the locking projections 29 from coming off by being caught with the side wall 28.

  FIGS. 6 to 9 are views showing an example in which the attachment structure of the welt according to the present invention is applied to the opening edge of the vehicle body side opening that is opened and closed by an automobile door as the second embodiment of the present invention. 6 is a side view showing an automobile body to which the welt mounting structure according to the present invention is applied, FIG. 7 is a sectional view taken along the line CC in FIG. 6, and FIG. 8 is a line DD in FIG. FIG. 9 is a perspective view showing the body side weather strip shown in FIGS. 6 and 7 in a single body and in a free state.

  As shown in FIGS. 6 to 8, a body side inner panel 35 and a body side outer panel 36 formed of a metal material are formed at the opening edge of a door opening 34 that is opened and closed by a rear door 32 that is an automobile door in the vehicle body 33. Is formed, and a weather strip 38 for sealing between the vehicle body 33 and the rear door 32 is mounted while concealing the flange portion 37 using the flange portion 37 as a fitting holding portion. Has been. Although not shown, the flange portion 37 and the weather strip 38 on the vehicle body 33 side are both formed in a closed loop shape as is well known.

  As shown in FIG. 9 in addition to FIGS. 7 and 8, the weather strip 38 is formed around a welt portion 39 as a mounting base portion fitted to the flange portion 37. As in the first embodiment described above, the welt portion 39 connects the end portions of the pair of side walls 40, 41 facing each other in the vehicle exterior / exterior direction with a bottom wall 42 interposed therebetween. By doing so, it has a substantially U-shaped cross section with the opening 43 as a position facing the bottom wall 42, and is a so-called core with a solid olefinic thermoplastic elastomer (TPO or TPV) which is a flexible material. It is formed as a material-less structure.

  Of the welt portion 39, the outer surface of the side wall 40 outside the passenger compartment is formed of a sponge-like olefin-based thermoplastic elastomer (TPO or TPV), which is a flexible material softer than the welt portion 39. A hollow seal lip 44 that elastically contacts the rear door 32 when the rear door 32 is closed is formed. On the inner surface of the side wall 40 outside the cabin of the welt portion 39, the same as the welt portion 39 is formed. A pair of upper and lower holding lips 45, 46 formed of a material are projected. The side wall 41 on the vehicle interior side of the welt portion 39 and the holding lips 45, 46 sandwich the flange portion 37, thereby sealing between the welt portion 39 and the flange portion 37.

  A cover lip 47 that extends while curving upward toward the vehicle interior side is formed at a corner portion formed by the side wall 41 and the bottom wall 42 on the vehicle interior side in the welt portion 39. The outer surface of the cover lip 47 and the outer surface of the bottom wall 42 of the welt portion 39 are respectively covered with a soft layer 50 formed of the same material as the seal lip 44 so as to be continuous with the seal lip 44.

  In addition, a thin portion 49 having a notch formed in the inner surface thereof is formed at the base portion of the cover lip 47 as a low-rigidity portion or an easily deformable portion having lower rigidity than other portions of the cover lip 47. As a result, the cover lip 47 functions as a swinging wall portion that can swing in the contact / separation direction with respect to the flange portion 37.

  A bridge portion 48 having a substantially L-shaped cross section that is bent toward the flange portion 37 side is projected on the inner surface of the cover lip 47 while being concealed by the cover lip 47, and the tip of the bridge portion 48 is welded. The portion 39 is in contact with the outer surface of the side wall 41 on the vehicle interior side.

  As shown in FIG. 6, a plurality of mounting holes 51 having a substantially rectangular shape in a side view extending in the longitudinal direction of the flange portion 37 are formed through the flange portion 37 at equal pitches in the longitudinal direction of the flange portion 37. As shown in FIGS. 7 to 9, a plurality of through holes 41a are formed in the side wall 41 on the vehicle interior side of the welt portion 39 at a pitch corresponding to each mounting hole 51 on the flange portion 37 side. 38, a plurality of locking protrusions 52 projecting from the tip of the bridge portion 48 toward the flange portion 37 side are respectively connected to the through holes 41a of the side wall 41 on the vehicle interior side and the mounting holes 51 on the flange portion 37 side. Are inserted through each. Then, the weather strip 38 is relatively positioned with respect to the flange portion 37 by holding the flange portion 37 between the head 54 described later and the side wall 41 on the vehicle interior side among the locking projections 52. The drop-off from the flange portion 7 is prevented.

  Here, after each of the locking projections 52 is extruded from an extruded product having a uniform cross-sectional shape including a cross-sectional shape corresponding to each of the locking projections 52, as in the first embodiment described above. In the extruded product, a section having a cross-sectional shape corresponding to each locking projection 52 is formed by cutting out a portion that should become each locking projection 52 in the longitudinal direction. Similarly, each through hole 41a is formed by cutting out the extruded product.

  That is, as shown in FIG. 8, in the longitudinal direction region where the mounting hole 51 does not exist on the flange portion 37 side of the welt portion 39, a cross-sectional portion corresponding to each locking projection 52 in the extruded product. By notching, the interference between each locking projection 52 and the flange portion 37 is avoided. As a result, as shown in FIG. 9, the locking projections 52 are intermittently formed at a pitch corresponding to the mounting holes 51 on the flange portion 37 side in the longitudinal direction of the welt portion 39.

  More specifically, each locking projection 52 includes a leg portion 53 extending from the tip of the bridge portion 48 while passing through each through hole 41a of the side wall 41 on the vehicle interior side and each mounting hole 51 on the flange portion 37 side. And a head 54 having a substantially flat semicircular cross section formed at the tip of the leg 53, and corresponding to each mounting hole 51 on the flange 37 side as having a uniform cross section in the longitudinal direction of the weather strip 38. The pitch is intermittently formed. Each locking projection 52 is made of the same material as the welt portion 39.

  That is, by fitting the leg 53 of each locking projection 52 and each mounting hole 51 on the flange portion 37 side, the weather strip 38 is relative to the flange portion 37 in the longitudinal direction and the protruding direction of the flange portion 37. The head 54 of each locking projection 52 that is positioned and inserted into the space formed by the holding lips 45, 46, the side wall 40 outside the vehicle compartment, and the flange portion 37 is the vehicle compartment of the welt portion 39. While contacting the inner surface of the outer side wall 40 and backing up the side wall 40, each locking projection 52 is prevented from coming off to prevent the opening of the welt portion 39. Specifically, the side wall 41 on the vehicle interior side is sandwiched between the front end of the bridge portion 48 and the flange portion 37, thereby preventing the opening of the side wall 41 and the rear door 32 of the seal lip 44 with the rear door 32. Due to the lip reaction force based on the contact, the opening of the side wall 40 outside the passenger compartment of the welt portion 39 is prevented.

  When attaching the weather strip 38 configured as described above to the flange portion 37, first, the free state of the weather strip 38 shown in phantom lines in FIG. 7, that is, the cover lip 47 and the bridge portion 48 are separated from the welt portion 39. In the expanded state, the welt part 39 is fitted to the flange part 37, and the cover lip 47 and the bridge part 48 are centered on the thin part 49 as shown by the arrow F in FIG. It will be rotated toward the 39 side. As a result, each locking projection 52 passes through each through hole 41 a formed in the side wall 41 on the vehicle interior side and each mounting hole 51 on the flange portion 37 side, and the head 53 of each locking projection 52 is provided. Is pushed into the space formed by the two holding lips 45, 46, the side wall 40 outside the passenger compartment, and the flange portion 37.

  More specifically, an operator who attaches the weather strip 38 to the flange portion 37 fits the welt portion 39 to the flange portion 37, and then uses his or her hand or a jig (not shown) in the longitudinal direction of the cover lip 47. The hand or jig is slid in the longitudinal direction of the cover lip 47 while pressing the portion toward the flange portion 37. As a result, the heads 54 of the respective locking projections 52 are sequentially pushed into the space formed by the two holding lips 45, 46, the side wall 41 outside the passenger compartment, and the flange portion 37.

  At this time, the heads 54 of the respective locking projections 52 are hooked on the flange portions 37 made of a metal material having higher rigidity than the weather strip 38, and the heads 54 of the respective locking projections 52 are flange portions. Since the operator can feel a so-called moderation feeling over the mounting holes 51 on the 37 side, the operator can make the heads 54 of the locking projections 52 have the mounting holes on the flange 37 side. The weather strip 38 can be securely attached to the flange portion 37 while sensing that the vehicle has exceeded 51 with a response.

  Therefore, according to the second embodiment, it is possible to obtain substantially the same effect as that of the first embodiment described above. The operator can feel a relatively strong moderation when the head 54 of the stop projection 52 passes over the mounting holes 51 on the flange portion 37 side, and the mounting holes 51 on the flange portion 37 side have a relatively strong feeling. Since the pushing amount for pushing the head 54 of each locking projection 52 becomes smaller than that in the first embodiment described above, the weather strip 38 can be attached more easily and reliably. become.

  Further, since the head 54 of each locking projection 52 is directly engaged with the flange 37, the space between the side wall 40 outside the passenger compartment 40 and the flange 37 in the welt 39 is narrowed. There is also an advantage that space can be saved.

  Here, in each of the above-described embodiments, an automobile weather strip having a seal lip has been described as an example. However, a weld piece having a substantially U-shaped cross section as a so-called welt body side without a seal lip is added. Needless to say, the present invention can also be applied to objects used for decoration or decoration purposes.

4 ... Door glass (other member)
7 ... Flange part 8 ... Weather strip 9 ... Welt part 10 ... Side wall outside the passenger compartment (oscillating wall part)
DESCRIPTION OF SYMBOLS 11 ... Side wall of vehicle interior side 12 ... Bottom wall 14 ... Thin part (deformable part)
DESCRIPTION OF SYMBOLS 15,16 ... Seal lip 17,18 ... Holding lip 17a, 18a ... Notch of holding lip 21 ... Mounting hole of flange part 22 ... Locking protrusion 25 ... Head of locking protrusion 26 ... Weather strip 27 ... Welt part 28 ... Side wall on the vehicle interior side 28a ... Through hole on the side wall on the vehicle interior side 29 ... Locking protrusion 31 ... Head of the locking protrusion 32 ... Rear door (counter member)
37 ... Flange part 38 ... Weather strip 39 ... Welt part 40 ... Side wall outside the passenger compartment 41 ... Side wall inside the passenger compartment 44 ... Seal lip 47 ... Cover lip (swinging wall part)
49 ... Thin part (deformable part)
51 ... Mounting hole in flange 52 ... Locking protrusion 54 ... Head of locking protrusion

Claims (10)

In the attachment structure of the welt for attaching the welt having a substantially U-shaped cross section formed of a flexible material to the flange portion on the vehicle body side,
A plurality of mounting holes are formed in the flange portion in the longitudinal direction of the flange portion, while the welt is formed on one side wall side of the flange portion and swings in the contact / separation direction with respect to the flange portion. A displaceable swing wall portion, a plurality of locking protrusions projecting from the swing wall portion toward the flange portion side at a pitch corresponding to each mounting hole on the flange portion side, and each locking protrusion portion The head for retaining each formed at the tip of each is formed on the welt side,
Each locking projection is inserted into each mounting hole on the flange portion side by swinging the swing wall portion toward the flange portion with the welt covered on the flange portion, and each locking projection A mounting structure for a welt, wherein a flange portion is held between the head portion and the one side wall.   Each locking projection including the head is cut out of a section having a cross-sectional shape corresponding to each locking projection in the extruded product having a uniform cross-sectional shape, leaving a portion to be the locking projection. The attachment structure of the welt according to claim 1, wherein the attachment structure is formed intermittently in the longitudinal direction of the welt.   The welt mounting structure according to claim 1 or 2, wherein an easily deformable portion serving as a center of the swing displacement is formed at a base portion of the swing wall portion.   4. A deformable portion is formed at a corner portion formed by one of the side walls and the bottom wall of the welt so that one of the side walls can be oscillated and displaced as a oscillating wall portion. The welt mounting structure described in 1. A pair of holding lips that extend from the bottom wall side and the opening end side of the welt to the inside of the welt and are opposed to each other with a predetermined interval are formed integrally with the welt. It is in elastic contact with the wall on the other side wall of the welt,
Each of the locking projections is inserted between the tips of both holding lips in addition to the mounting holes on the flange side, and the heads of the locking projections are prevented from being pulled out by being caught by both holding lips. The welt mounting structure according to any one of claims 1 to 4, wherein:   6. The mounting structure for a welt according to claim 5, wherein each of the holding lips has a notch for facilitating bending deformation in a direction away from the flange portion.   The welt mounting structure according to any one of claims 1 to 4, wherein the head of each locking projection is configured to prevent the locking projection from coming off when hooked with the flange portion. .   The head of each locking projection is brought into contact with the inner surface of the other side wall of the welt to back up the other side wall with the head of each locking projection. Item 8. The welt mounting structure according to any one of Items 5 to 7.   A plurality of through holes are formed in the other side wall of the welt at a pitch corresponding to each mounting hole on the flange portion side, and each locking projection has each through hole in addition to each mounting hole on the flange portion side. 5. Each of the locking protrusions is inserted into the locking protrusions so that the locking protrusions are prevented from coming off when the heads of the locking protrusions are hooked with the other side wall. Welt mounting structure. A weather strip to be mounted on the vehicle body side flange portion with the mounting structure according to claim 1,
A weather strip, characterized in that a seal lip that elastically contacts the mating member protrudes from the outer surface of the other side wall.

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