JP4300578B2 - Automotive door weather strip - Google Patents

Description

  The present invention relates to an automobile door weather strip that seals between an automobile door and a periphery of a vehicle body opening.

  As shown in FIG. 6, the seal between the door 1 of the automobile and the periphery 6 of the vehicle body opening is formed on the door weather strip 110 attached to the outer periphery of the door frame 2 of the door 1 and / or the periphery 6 of the vehicle body opening. This is done by an opening weather strip 130 attached to the flange 6a. The seal between the door glass 5 and the door 1 is made by a glass run 120 attached to the channel 3 on the inner periphery of the door frame 2.

The glass run 120 is attached to the channel 3 and houses the end portion of the door glass 5 in a substantially U-shaped section made up of the vehicle outer side wall 121, the bottom wall 122 and the vehicle inner side wall 123, and the vehicle outer side wall 121 and the vehicle inner side. A vehicle outer side seal lip 124 and a vehicle inner side seal lip 125 extending from the front end of the side wall 123 are brought into contact with the vehicle outer side surface and the vehicle inner side surface of the door glass 5 for sealing.
The opening weather strip 130 attached to the flange 6a at the periphery 6 of the vehicle body opening is attached to the flange 6a by a trim part 131 having a substantially U-shaped cross section, and the hollow seal part 132 is brought into contact with the inner surface of the door frame 2 or the like. Seal.

  The door weather strip 110 attached to the outer peripheral portion of the door frame 2 of the door 1 includes an attachment base portion 111 and a hollow seal portion 114 and a seal lip portion 116 integrally formed on the upper surface thereof. The attachment base 111 is fitted into the retainer 4 attached to the outer periphery of the door frame 2 and is fixed to the door frame 2. When the door 1 is closed, the seal lip 116 abuts on the outermost side edge of the vehicle body opening peripheral edge 6, and a gap between the outer peripheral edge of the door frame 2 and the vehicle outer side edge of the vehicle body opening peripheral edge 6. To seal. At that time, the hollow seal portion 114 is in contact with the bulging portion on the inner side of the vehicle rather than the portion where the seal lip portion 116 of the vehicle body opening periphery 6 is in contact, and seals between the door 1 and the vehicle body opening periphery 6. ing.

However, when the automobile is traveling at high speed, the door 1 may be displaced to the outside of the vehicle due to the atmospheric pressure or the like. At this time, the seal lip portion 116 of the door weather strip 110 may be separated from the vehicle body opening periphery 6 or the tip of the seal lip portion 116 may protrude to the outside of the vehicle, resulting in a decrease in sealing performance.
For this reason, the seal lip 116 is formed in a hollow shape to increase the contact area with the vehicle body opening periphery 6, and the seal lip 116 is separated from the vehicle body opening periphery 6 even when the door 1 is displaced to the outside of the vehicle. There has been an attempt to eliminate them (for example, see Patent Document 1).

  However, since this hollow seal lip portion 116 deforms the two hollow portions together with the hollow seal portion 114 when the door is closed, the closing force of the door 1 is increased, and the assembly error of the automobile door 1 is increased. Due to the deformation of the seal lip portion 116 of the door weather strip 110 due to long-term use, the hollow seal lip portion 116 is crushed when the door is closed, and protrudes from the gap between the door 1 and the vehicle body opening edge 6 to the outside of the vehicle. In some cases, the design was not preferable.

Therefore, as shown in FIG. 7, the seal lip portion 116 is formed in a cross-section fishhook shape, and the upper end portion of the seal lip portion 116 is attached to the vehicle body opening periphery 6 or the roof drip molding 601 provided on the vehicle body opening periphery 6. Attempts have been made to seal by contact (see, for example, Patent Document 2).
However, since the seal lip portion 116 having a cross-section fishhook shape has a base portion having a substantially uniform wall thickness, when the vehicle body opening peripheral edge 6 comes into contact with the upper end portion of the seal lip portion 116 when the door is closed. The respective portions of the seal lip 116 are deformed and the deformed state is not stable, the tip of the seal lip 116 is detached from the tip of the door frame 2 and protrudes to the outside of the vehicle, or the root of the seal lip 116 May be deformed by the peripheral edge 6 of the vehicle body opening and may be separated from the peripheral edge of the vehicle body opening to deteriorate the sealing performance.
JP 58-39519 A Japanese Utility Model Publication No. 3-10922 (Figs. 2 and 3)

  For this reason, the present invention provides a door weather strip for an automobile having a good appearance by surely sealing the seal lip portion of the door weather strip between the periphery of the vehicle body opening and the outer peripheral edge of the door frame. It is intended.

In order to solve the above problems, the present invention of claim 1 is a door weather strip that seals between a door of an automobile and a periphery of a vehicle body opening of the automobile, and is attached to the outer periphery of the door.
The door weather strip has a mounting base that is attached to the outer periphery of the door, and a seal portion that is formed integrally with the mounting base and contacts the periphery of the opening of the vehicle body to seal between the door and the periphery of the opening of the vehicle body. The seal portion is a lip-shaped seal lip portion that seals between the outer peripheral edge of the door and the vehicle outer side edge at the periphery of the vehicle body opening, and the vehicle body opening portion on the vehicle inner side than the portion where the seal lip portion abuts The seal lip portion is formed by a hollow lip seal portion that abuts on the periphery, and the seal lip portion extends from the attachment base portion toward the periphery of the vehicle body opening, and is bent outward from the seal lip root portion. extending a sealing lip intermediate portion you contact the lower surface of the exterior of the vehicle body opening rim, a cross section consisting of the sealing lip other party section by bending the mounting base direction from the sealing lip intermediate portion is extended substantially U-shaped The inner space of the seal lip portion having a substantially U-shaped cross-section is formed so that the width in the vicinity of the middle portion of the seal lip inside the substantially U-shaped opening is wider than the width of the opening portion of the approximately U-shape. The seal lip middle part is formed with a notch inside the bent part that bends in the vehicle outward direction, and the seal lip tip part is slidable with its tip contacting the back surface of the outer peripheral edge of the door in a line contact state. And curved in a concave shape toward the outside of the vehicle, the tip is formed thick,
The thickness of the seal lip portion is a door weather strip characterized in that the seal lip root portion is formed to be the thickest, and the seal lip middle portion and the seal lip tip portion are formed to become thinner in this order. .

  In the first aspect of the present invention, the door weather strip includes an attachment base attached to the outer peripheral portion of the door, an integrally formed upper surface of the attachment base, abutting the periphery of the vehicle body opening, and the door and the periphery of the vehicle opening. Therefore, when the door is closed, the seal portion comes into contact with the periphery of the vehicle body opening, and the space between the outer periphery of the door and the periphery of the vehicle body opening can be sealed.

The seal portion is a lip-shaped seal lip portion that seals between the outer peripheral edge of the door and the outer edge of the vehicle body opening, and the vehicle body opening periphery on the vehicle inner side than the portion where the seal lip contacts. And a hollow seal portion in contact with the hollow shape. Therefore, it is possible to double seal between the outer peripheral edge of the door and the vehicle outer side edge of the periphery of the vehicle body opening, preventing rainwater, dust, noise, etc. from entering the vehicle interior and excellent sealing performance. ing. Since the hollow seal portion is provided on the vehicle inner side than the seal lip portion, even if the hollow seal portion is greatly deformed due to door assembly variation or the like, it does not protrude to the vehicle outer side. The sealing lip, as described later, since a lip, flexible, the entire seal lip portion is easily deformed that the seal lip intermediate portion is brought into contact with the vehicle body opening rim, also, seal The front end of the lip can close the gap between the outer peripheral edge and the front end of the door and the outer edge of the vehicle body opening, and the appearance is good.

The seal lip portion extends from the mounting base to the periphery of the vehicle body opening and is bent from the seal lip base to the outside of the vehicle. and the seal lip intermediate portion that Sessu, section consisting of the sealing lip other party portion that extends bent in the mounting proximally from the sealing lip intermediate portion forms a substantially U-shape. For this reason, when the door is closed, the seal lip root portion supports the seal lip intermediate portion, and the seal lip intermediate portion abuts on the periphery of the vehicle body opening and seals the periphery of the vehicle body opening. The front portion can contact the back surface (the vehicle inner side surface) of the outer peripheral edge of the door frame to seal the door frame.

A seal lip intermediate portion abuts against the lower surface of the exterior of the sealing lip root portion and the vehicle body opening rim and the sealing lip intermediate portion and the seal lip other party unit is easily flexures at its bent portion because it is formed by bending each When the door is closed, the outer surface (upper surface) of the middle part of the seal lip is in contact with the lower surface of the periphery of the vehicle body opening, and the outer surface of the front end of the seal lip is on the rear surface of the outer peripheral edge of the door frame. It can be reliably contacted and sealed.
The internal space of the seal lip portion inside the substantially U-shaped cross section is formed so that the width in the vicinity of the substantially U-shaped back side portion ( seal lip middle portion ) is wider than the width of the approximately U-shaped opening portion. Therefore, the bent portions of the seal lip root portion and the seal lip intermediate portion and between the seal lip intermediate portion and the seal lip tip portion are acute angles. Therefore, when the seal lip portion (seal lip middle portion) is pushed downward by the periphery of the vehicle body opening, it can be reliably bent by the bent portion, and is separated from the periphery of the vehicle body opening and the outer peripheral edge of the door frame. There is nothing.
In addition, a wide contact area between the seal lip intermediate portion and the vehicle body opening periphery can be ensured, and stable sealing can be achieved.
Since the notch is formed inside the bent part where the seal lip middle part bends outward from the base of the seal lip, when the door is closed, when the seal lip middle part is pushed downward by the periphery of the vehicle body opening, Can bend easily with respect to the base part of the seal lip, preventing deformation of the base part of the seal lip, and ensuring that the upper surface of the middle part of the seal lip can be reliably Can be brought into contact with the lower surface of the vehicle outside .
The front end of the seal lip is formed so that the tip of the seal lip can slide in line contact with the rear surface of the outer peripheral edge of the door. The tip of the seal lip tip portion can be moved by sliding the outer peripheral back surface of the door in line contact. Therefore, the seal lip other party unit is prevented from bulging in the vehicle outside from between the outer peripheral edge of the body opening rim and the door. Further, since the seal lip tip portion can slide easily, the seal lip portion does not easily descend and increase the door closing force. Furthermore, since the seal lip tip portion and the back surface of the outer peripheral edge of the door are in reliable contact with each other, a seal between them can be secured.
Since the seal lip tip is curved concavely toward the outside of the vehicle, even if the seal lip tip is bent when the seal lip middle part is pushed down by the periphery of the vehicle body opening, it deforms in the in-vehicle direction. Therefore, it is possible to suppress the outward protrusion of the seal lip tip portion near the center . In addition, since the tip of the seal lip tip is thick, even if the seal lip tip is thin, the tip does not wavy and reliably contacts the back of the outer edge of the door frame. And can be sealed.

The thickness of the sealing lip, the sealing lip root portion is most thick, sealing lip intermediate portion, which is formed to be thinner in order of the sealing lip other party section, the sealing lip intermediate portion by the vehicle body opening rim Even if is pushed, the seal lip root portion can support the seal lip intermediate portion and the seal lip tip portion without deforming the seal lip root portion. Since the middle part of the seal lip is thicker than the tip part of the seal lip, the middle part of the seal lip only bends at the bent part. Abut. Therefore, the direction of the seal lip tip portion does not swing, the seal lip tip portion can surely come into sliding contact with the back surface of the outer peripheral edge of the door frame, and the seal lip portion does not deform abnormally as a whole. It does not protrude outside.

The present invention, because formed by bending the seal lip of the door weather strip in a substantially U-shaped, its easily flex it can at the bent portion, the sealing lip intermediate portion when the door is closed and the vehicle body opening rim, The seal lip tip portion can reliably contact the outer peripheral edge of the door frame to seal between the two.
Further, the thickness of the sealing lip root portion, the sealing lip intermediate portion, thicker than the thickness of the seal lip other party section, even when the seal lip intermediate portion when the door is closed is lowered in contact with the vehicle body opening rim, seal The base of the lip is hard to deform, the middle part of the seal lip can be reliably brought into contact with the periphery of the vehicle body opening, and the end part of the seal lip can be brought into contact with the back surface of the outer edge of the door frame. The seal can be maintained.

Embodiments of the present invention will be described with reference to FIGS. 3-5.
FIG. 5 is a side view of the automobile. As shown in FIG. 5, the door frame 2 is provided in the upper part of the door 1 of a motor vehicle, and the door glass 5 is attached so that raising / lowering is possible. That is, a door weather strip 10 is attached to the outer periphery of the door frame 2 to seal between the door 1 and the periphery 6 of the vehicle body opening.
A channel 3 is provided on the inner periphery of the door frame 2, and a glass run is attached in the channel 3 to guide the raising and lowering of the door glass 5 and to seal between the door glass 5 and the door frame 2. is doing.

1 and 2 are sectional views of a door weather strip 10 as a reference example .
FIG. 2 is a cross-sectional view of the door frame 2 along the line AA in FIG. 5 and shows a state in which a door weather strip 10 as a reference example is mounted on the outer periphery of the automobile door 1.
As for the door weather strip 10, a linear part is shape | molded long by extrusion molding, and the part corresponding to the corner part of the door frame 2 is formed by die molding.

As shown in FIG. 1, the sectional shape of a door weather strip 10 as a reference example is formed from an attachment base 11 attached to the outer periphery of the door frame 2 and a seal part integrally formed on the upper surface of the attachment base 11. Is done. The seal portion is a seal lip portion having a lip shape that seals between the outer peripheral edge of the door frame 2 formed on the outer side of the upper surface of the mounting base 11 and the outer side edge of the vehicle body opening periphery 6. 16 and a hollow seal portion 14 that is formed on the upper surface of the mounting base 11 on the inner side of the vehicle and has a hollow shape that slightly contacts the vehicle body opening peripheral edge 6 on the inner side of the vehicle from the portion where the seal lip portion 16 contacts. Formed from.

The mounting base 11 is formed in a substantially triangular shape with a thick outer side in the cross section. As will be described later, both ends in the width direction of the attachment base portion 11 project in the width direction so that the attachment base portion 11 can be fitted into the retainer 4 attached to the outer peripheral portion of the door frame 2.
The mounting base 11 having a substantially triangular cross section is provided with a hollow mounting base hollow 12 near the center thereof. For this reason, while being able to reduce the weight of the door weather strip 10, the softness | flexibility of the attachment base 11 can be improved.

As described above, the seal lip portion 16 and the hollow seal portion 14 are provided on the upper surface of the attachment base portion 11. The hollow seal portion 14 will be described later.
The seal lip portion 16 is formed of a seal lip root portion 16a, a seal lip middle portion 16b, and a seal lip tip portion 16c in the order of extending from the mounting base 11, and is formed by bending each plate-like, and its cross-sectional shape Is substantially U-shaped.
The seal lip portion 16 can be formed of solid rubber or sponge rubber. When formed of solid rubber, the surface is smooth, so the appearance is improved. In addition, since solid rubber has better sound insulation than sponge rubber, noise intrusion into the vehicle compartment can be reduced.

  The seal lip root portion 16a extends in the vicinity of the apex on the vehicle outer side of the mounting base 11 having a substantially triangular cross section, that is, from the vehicle outer side of the mounting base hollow portion 12 toward the vehicle body opening peripheral edge 6 and upward in FIG. Established. As a whole, the seal lip root portion 16a is formed thicker than the thickness of the seal lip intermediate portion 16b and the seal lip tip portion 16c. For this reason, even when the seal lip portion 16 abuts against the vehicle body opening peripheral edge 6 and is pushed downward when the door is closed, the seal lip root portion 16a is not easily deformed, and the seal lip intermediate portion 16b and the seal lip tip portion 16c are connected to the plate. Thus, the upper surface of the seal lip intermediate portion 16b can be reliably brought into contact with the lower surface of the periphery of the vehicle body opening.

In particular, the portion close to the mounting base 11 may be formed thicker. Thereby, the deformation | transformation of the seal lip base part 16a can be prevented further.
Furthermore, the upper portion of the seal lip root portion 16a may be formed to be slightly bent toward the vehicle interior side. As a result, the bent portion with the seal lip intermediate portion 16b has an acute angle, and the seal lip intermediate portion 16b can be easily bent while being plate-shaped, and the seal lip intermediate portion 16b can be formed long. Therefore, the deflection load of the seal lip portion 16 when the seal lip intermediate portion 16b is lowered by being pushed by the vehicle body opening peripheral edge 6 can be reduced.

Furthermore, a mounting base ridge 13 protruding laterally outwardly from the vehicle can be provided at a continuous portion between the seal lip root portion 16a and the mounting base 11. A recess is formed between the mounting base ridge 13 and the side end of the mounting base 11, and the side end on the vehicle exterior side of the retainer 4 provided on the outer periphery of the door frame 2 is inserted into the recess. The door weather strip 10 can be held by sandwiching the mounting base 11 together with the side end inside the vehicle.
In addition, by setting it as the specification by which the vehicle outer side edge of the retainer 4 fits into said recessed part, the outer surface of the attachment base part protrusion 13 and the retainer 4 can contact reliably, and it can seal between both. .

  The seal lip middle portion 16b extends from the seal lip root portion 16a so as to be bent substantially horizontally in the vehicle outward direction. The seal lip intermediate portion 16b is substantially plate-shaped in cross section. When the door is closed, the upper surface of the seal lip intermediate portion 16b can contact the lower surface of the vehicle body opening periphery 6 to seal the space between the vehicle opening periphery 6. Since the vehicle body opening periphery 6 and the seal lip intermediate portion 16b are in planar contact with each other, the contact with the vehicle body opening periphery 6 may be released even when the door 1 is displaced to the outside of the vehicle due to atmospheric pressure or the like during high-speed traveling. And the seal lip portion 16 does not protrude outside the vehicle.

Further, since the upper surface of the seal lip intermediate portion 16b is flat, when the door 1 is in contact with the peripheral edge 6 of the vehicle body opening, the door 1 can be reliably in contact with the lower surface of the peripheral edge 6 of the vehicle body opening portion. And can be sealed.
Furthermore, since the seal lip intermediate portion 16b is flat, the bent portion bends when pushed down by the vehicle body opening peripheral edge 6 and the portion does not dent and the door closing force increases. Can be suppressed.

A seal lip notch 16d is provided inside the bent portions of the seal lip root portion 16a and the seal lip middle portion 16b.
Since the seal lip notch 16d is formed, the seal lip intermediate portion 16b is easily bent with respect to the seal lip root portion 16a, and when the door opening peripheral edge 6 pushes the seal lip intermediate portion 16b when the door is closed, the seal lip notch 16d is formed. By rotating around the 16d portion and the seal lip intermediate portion 16b rotating downward, it is possible to reduce the force applied to the seal lip root portion 16a and prevent the seal lip root portion 16a from being deformed.
Furthermore, you may provide a notch inside the bending part between the seal lip middle part 16b and the seal lip tip 16c.

The seal lip tip 16c is bent and extended from the front end of the seal lip intermediate portion 16b toward the mounting base 11 in the downward direction in FIG.
The outer surface of the seal lip tip portion 16c slides on the back surface of the outer peripheral edge of the door frame 2 when pushed by the vehicle body opening periphery 6 when the door is closed.
The seal lip tip portion 16c has a substantially plate-like cross section and is thinner than the other portions of the seal lip portion 16, so that it has flexibility and is always door frame 2 even if the assembly of the door 1 varies. Can continue to contact the back surface of the outer peripheral edge.

  On the back surface of the outer peripheral edge of the door frame 2, a gap is provided between the seal lip tip 16 f and the side end of the retainer 4 so that the seal lip tip 16 f can slide. Therefore, when the seal lip portion 16 is pushed by the vehicle body opening peripheral edge 6, the seal lip tip 16 f can move the distance of the gap toward the lower side of the door frame 2. For this reason, when the seal lip portion 16 is pushed by the vehicle body opening periphery 6, the seal lip portion 16 does not bulge out of the vehicle exterior from the gap between the vehicle body opening periphery 6 and the outer peripheral edge of the door 1. Further, since the seal lip tip 16f can easily slide with the back surface of the outer peripheral edge of the door frame 2, a seal between them can be secured.

The thickness of the seal lip portion 16 is such that the seal lip root portion 16a is the thickest, and the seal lip middle portion 16b and the seal lip tip portion 16c become thinner in this order.
In this case, even if the seal lip portion 16 is pushed by the vehicle body opening periphery 6 when the door is closed, the seal lip root portion 16a can support the seal lip intermediate portion 16b and the seal lip tip portion 16c, and the seal lip intermediate portion 16b. Is bent only at the bent portion between the seal lip root portion 16a and the seal lip intermediate portion 16b itself is not deformed, so that the seal lip tip portion 16c is surely brought into contact with the back surface of the outer peripheral edge of the door frame 2. be able to. For this reason, the seal | sticker between the seal lip | rip part 16 and the door frame 2 can be performed reliably. Further, since the seal lip intermediate portion 16b is plate-shaped and hardly deformed, the seal lip portion 16 does not deform abnormally, and the seal lip tip portion 16c does not protrude outside the vehicle.
Further, since the thickness of the seal lip tip portion 16c is thin, the seal lip can be maintained without being separated from the back surface when deformed flexibly when contacting the back surface of the outer peripheral edge of the door frame 2. .

  The cross-sectional shape of the seal lip portion 16 is substantially U-shaped as described above. And the opening part is narrowing a little. For this reason, the inner space of the seal lip portion 16 is wider in the vicinity of the substantially U-shaped seal lip intermediate portion 16b which is the back than the width of the substantially U-shaped opening portion which is the entrance. Accordingly, the angle formed by the bent portions of the seal lip root portion 16a and the seal lip intermediate portion 16b, and the seal lip intermediate portion 16b and the seal lip tip portion 16c is an acute angle.

Therefore, when the seal lip portion 16 is pushed down by the vehicle body opening periphery 6 when the door is closed, the seal lip portion 16 is surely bent at each of the bent portions, so that the seal lip intermediate portion 16b is connected to the vehicle body opening periphery 6. , And the seal lip tip 16c is not separated from the back surface of the outer peripheral edge of the door frame 2, and can be reliably sealed.
Further, as described above, a wide contact area between the seal lip intermediate portion 16b and the vehicle body opening periphery 6 can be secured.

The hollow seal portion 14 has a circular cross section or an elliptical hollow shape, and extends from the slope portion of the triangular section on the upper surface of the mounting base 11 to the vehicle interior side.
When the door is closed, the tip of the hollow seal portion 14 comes into contact with the bulging portion of the vehicle body opening peripheral edge 6 inside the vehicle rather than the portion where the seal lip portion 16 of the vehicle body opening peripheral edge 6 comes into contact. Is deformed along the bulging portion and seals between the door frame 2 and the vehicle body opening periphery 6. The hollow seal portion 14 and the seal lip portion 16 can double seal between the door frame 2 and the vehicle body opening periphery 6.
The hollow seal portion 14 is preferably formed of a sponge material (sponge rubber) from the viewpoint of ease of deformation and weight reduction.

In the embodiment as a reference example shown in FIG. 1, the mounting base 11 is attached to the retainer 4, but the retainer 4 is abolished and a double-sided adhesive tape is attached to the back surface of the mounting base 11, and the double-sided adhesive tape May be attached to the outer periphery of the door frame 2 to attach the door weather strip 10 to the door frame 2. In this case, since the retainer 4 can be abolished, it can contribute to weight reduction of a vehicle.

Next, an embodiment of the present invention will be described with reference to FIGS.
FIG. 3 is a cross-sectional view of the door weather strip 10A according to the embodiment of the present invention , and FIG. 4 is a cross-sectional view of the door frame 2 along the line AA in FIG. A state in which 10A is mounted on the outer periphery of the automobile door 1 is shown.
The door weather strip 10A of the embodiment of the present invention is different from the door weather strip 10 of the reference example only in the shape of the seal lip tip portion 16c of the seal lip portion 16. Therefore, it demonstrates centering on the shape of the seal lip tip part 16c of the seal lip part 16, and abbreviate | omits description of the same part.

The seal lip tip portion 16c is bent and extended from the front end of the seal lip intermediate portion 16b toward the mounting base 11 in the downward direction in FIG.
The cross-sectional shape of the seal lip tip portion 16c is curved in a plate shape and an arcuate concave shape toward the vehicle outer side. For this reason, when the seal lip portion 16 is pushed by the vehicle body opening peripheral edge 6 and descends, the seal lip tip portion 16c bends so as to be deformed in the vehicle interior direction, so that it makes line contact with the outer peripheral edge of the door frame 2. In this state, the downward movement of the seal lip tip portion 16c is hard to be caught, and the protrusion of the seal lip tip portion 16c in the vehicle outer side direction can be suppressed.

The tip end of the seal lip tip 16c slightly swells in the vehicle outward direction to be in a line contact state, and the seal lip tip 16f slides on the back surface of the outer peripheral edge of the door frame 2.
The seal lip tip portion 16c has a substantially plate-like cross section and is thinner than the other portions of the seal lip portion 16, so that it has flexibility and is always door frame 2 even if the assembly of the door 1 varies. Can continue to contact the back surface of the outer peripheral edge.
Further, the seal lip tip 16f, which is the tip of the seal lip tip 16c, is formed with a thick wall having an arcuate cross section. Therefore, even if the seal lip tip 16c is entirely thin, the seal lip tip 16f. The surface of the door frame 2 can be reliably abutted against the back surface of the outer peripheral edge of the door frame 2 to ensure a seal therebetween.

  On the back surface of the outer peripheral edge of the door frame 2, a gap is provided between the seal lip tip 16f and the side end of the retainer 4 so that the seal lip tip 16f can slide in a line contact state. For this reason, when the seal lip portion 16 is deformed, the seal lip tip 16f can move the distance of the gap portion downward. For this reason, when the door is closed, the seal lip tip 16c does not bulge outward from the gap between the vehicle body opening edge 6 and the outer peripheral edge of the door frame 2. Further, since the seal lip tip 16f can slide easily and in line contact with the back surface of the outer peripheral edge of the door frame, the seal lip tip 16c and the back surface of the outer peripheral edge of the door frame 2 are sealed. Can be secured.

Next, a method for manufacturing the door weather strip 10 will be described.
In the molding of the linear portion of the door weather strip 10, synthetic rubber, thermoplastic elastomer, and soft synthetic resin are used as the molding material. For example, EPDM rubber is used for synthetic rubber, polyolefin-based elastomer is used for thermoplastic elastomer, In the soft synthetic resin, soft vinyl chloride or the like is used. In order to improve flexibility, it is preferable to foam these materials and use them as sponge materials.
In the case of synthetic rubber, it is conveyed to a vulcanizing tank after extrusion and heated by hot air or high frequency to vulcanize and foam. In the case of a thermoplastic elastomer or soft synthetic resin, it is heated and foamed simultaneously with or after extrusion, and then cooled and solidified. Thereafter, it is cut to a predetermined length to produce an extruded part.

  Next, the molding part is molded by cutting the extruded member produced as described above into predetermined dimensions, and sandwiching the end of the cut extruded part in a mold for molding the molding part. Sponge rubber material or solid material that forms the molding part is injected into the cavity of the mold. The cross-sectional shape of the molded part is substantially the same as the cross-sectional shape of the extruded part. It is preferable to use the same type of molding material as that used for the extruded part. In the case of synthetic rubber, the mold is poured into a mold, and then the mold is heated to vulcanize and foam. At this time, since the extrusion molding part and the molding part can be vulcanized and bonded using the same material or the same kind of material, they are integrally fixed. In the case of a thermoplastic elastomer or a soft synthetic resin, since the injected material is melted when injected into the mold, the extruded part and the molded part are integrally fused by the heat and pressure.

It is sectional drawing of the door weather strip which is a reference example . It is a cross-sectional shape along the AA line of FIG. 5 of the part attached to the door frame upper part which is a reference example . It is sectional drawing of the door weather strip which is embodiment of this invention . 6 is a cross-sectional shape taken along line AA in FIG. 5 of a portion attached to the upper portion of the door frame according to the embodiment of the present invention . It is a side view of a motor vehicle door. It is sectional drawing of the door frame upper part along the AA line of the conventional FIG. It is sectional drawing of the conventional door weather strip.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Door 2 Door frame 6 Car body opening periphery 10, 10A Door weather strip 11 Mounting base 14 Hollow seal part 16 Seal lip part 16a Seal lip root part 16b Seal lip middle part 16c Seal lip tip part 16d Seal lip notch

Claims (1)

In the door weather strip that seals between the door of the automobile and the periphery of the vehicle body opening of the automobile, and is attached to the outer periphery of the door,
The door weatherstrip is attached to an outer peripheral portion of the door, and is formed integrally with the mounting base and abuts on a periphery of the vehicle body opening to seal between the door and the periphery of the vehicle body opening. Having a seal part,
The seal portion includes a lip-shaped seal lip portion that seals between an outer peripheral edge of the door and a vehicle outer side edge of the periphery of the vehicle body opening, and a vehicle body opening that is closer to the vehicle interior than a portion where the seal lip portion abuts. Formed from a hollow seal portion that is in contact with the periphery of the portion,
The seal lip portion extends from the mounting base in the peripheral direction of the vehicle body opening, and is bent and extends outward from the seal lip base portion so that the vehicle at the periphery of the vehicle body opening. and the seal lip intermediate portion you contact the lower surface of the outer cross-section comprising a seal lip other party portion that extends bent in the mounting proximally from said sealing lip intermediate portion forms a substantially U-shape, the cross section is substantially U The inner space of the U-shaped seal lip portion is formed wider in the vicinity of the middle portion of the substantially U-shaped seal lip than the width of the substantially U-shaped opening portion, and the seal lip from the root portion of the seal lip is formed. A notch is formed inside the bent portion where the intermediate portion bends in the vehicle exterior direction, and the tip of the seal lip tip portion is slidable in contact with the back surface of the outer peripheral edge of the door in a line contact state. Formed into Together, concavely curved toward the vehicle exterior side, the tip is formed in the thick,
The thickness of the seal lip portion is such that the seal lip root portion is the thickest, and the seal lip is formed so as to become thinner in the order of the seal lip middle portion and the seal lip tip portion. The strip.

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