JPH0649459Y2 - Weather strip for door glass - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention is attached to a side edge of a rear door glass of a four-door vehicle or a rear side glass of a two-door vehicle (hereinafter referred to as a rear door glass, etc.), and is a door glass of a cashless door The present invention relates to a weather strip for a door glass that seals a door.

<Prior Art> The rear end of the front window door glass used in a hard-top vehicle without a center pillar is usually sealed by a weather strip vertically attached to the front end of the rear door glass. -87717 publication etc.).

As shown in the cross-sectional view of FIG. 5, this kind of weather strip is formed by coating a sheet metal insert 25 with a polymer elastic material M and is attached to a rear door glass 8 or the like with a U-shaped cross section. 20 and a seal lip portion 21 integrally formed on the mounting base portion 20. A seal lip 21a is integrally formed at the tip of the seal lip portion 21 and is bent inwardly of the outer side surface of the vehicle. The seal lip 21a abuts against the inside of the sashless door glass 9 and seals. Sheet metal insert 25
Consists of a U-shaped cross-section 22 inside the mounting base 20 and an L-shaped cross-section 23 inside the base of the seal lip 21. At the tip of the L-shaped cross-section 23, a sheet metal insert 25 is inserted into the die 27 during molding. A protrusion 24 is provided to support the inside of the cavity C (see FIG. 6). Therefore, at the time of forming the weather strip, since the projection 24 of the L-shaped cross-section portion 23 of the sheet metal insert is supported by contacting the cavity C surface of the die 27, these projections 24 are formed on the vehicle exterior surface side of the formed weather strip. There was a problem in terms of design because it was exposed in a dot-like shape that was visible from outside.

Therefore, it was considered to extend the L-shaped cross section 23 in the width direction and expose the projection 24 at a position hidden by the seal lip 21a at the tip of the seal lip portion 21 and invisible from the outside, as shown in FIG. During injection molding of this weather strip, the gate located at the tip of the seal lip part 21
L-shaped section of insert 25 when material is injected from 26
23 is bent by receiving the injection pressure, the middle part of the L-shaped cross-section part 23 comes into contact with the cavity C surface of the die 27, and the part is exposed at a part visible from the outside, which again causes a problem in design. I found out.

The present invention has been made in order to solve the above problems, and prevents deformation of the sheet metal insert during molding so that the insert is not exposed at a portion visible from the outside of the product, and the sashless type with a good appearance. It is intended to provide a weather strip for a door glass.

<Means for Solving the Problems> In order to achieve the above object, a weather strip for a door glass of the present invention is vertically attached to a front end portion of a rear door glass or a rear side glass, and is attached to a front side of the touch screen. For sashless door glass that is injection-molded with a polymeric elastic material using a sheet metal insert that has a seal lip portion that seals the rear end of the door glass and has an L-shaped cross section at the bottom of the U-shaped cross section In the weather strip, a protrusion serving as an insert support at the time of molding is provided at substantially the tip of the L-shaped cross-section inserted into the seal lip, and the width of the L-shaped cross-section is the protrusion. The seal lip is extended to a position reaching the opposing surface of the seal lip, and a reinforcing unevenness is provided at the base of the L-shaped cross section.

<Operation and effect of the invention> This weather strip for a door glass of a sashless door is provided with a projection for supporting an insert at the time of molding at a substantially tip of an L-shaped cross section of a sheet metal insert. The length of the projection is extended to a position where the projection reaches the opposing surface of the seal lip in the seal lip portion, and therefore the projection is exposed at a portion hidden by the seal lip and cannot be seen from the outside. In addition, since reinforcing rigidity is provided at the base of the L-shaped cross-section of the sheet metal insert to increase its rigidity, the cavity of the die in which the sheet metal insert is placed,
During injection molding for injecting a polymer elastic material, the L-shaped cross section of the sheet metal insert is not easily bent due to the reinforcing effect of the reinforcing unevenness, and the sheet metal insert is not exposed at a portion visible from the outside. Therefore, a weather strip having a good appearance can be obtained.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a front view of a weather strip for a sashless door glass, and FIG. 2 shows an enlarged sectional view thereof.
As shown in FIG. 4, this weather strip W includes a mounting base 10 having a U-shaped cross section that is vertically mounted on the front end of a rear door glass 8 of a hard top vehicle, and a touchless door glass 9.
And a seal lip portion 11 that seals the rear end portion of the rear. A seal lip 11a is integrally formed at the tip of the seal lip portion 11 and bent inwardly of the outer side surface of the vehicle. The seal lip 11a abuts on the inside of the sashless door glass 9 to seal it (see FIG. 5).

The weather strip W is formed by coating a polymeric elastic material M around the sheet metal insert 15, and the sheet metal insert 15 has a U-shaped cross section 12 in the mounting base 10 as shown in FIG. And L-shaped cross section in the base of seal lip 11
The U-shaped cross section 12 and the L-shaped cross section 13 are fixed to each other by welding or the like. The cross-sections 12 and 13 of the sheet metal insert 15 are prepared by press molding using a steel plate or the like having a wall thickness t = 0.5 to 1.2 mm.

The width direction of the L-shaped cross section 13 is longer than that of the conventional one,
A sheet metal insert 15 near the tip of the mold
A plurality of protrusions 14 are provided at appropriate intervals (usually 10 to 20 mm) for support within 27 cavities C. Further, a reinforcing unevenness 1 for reinforcement is provided at the base of the L-shaped cross section 13 so that the L-shaped cross section 13 is not easily bent by the injection pressure. The reinforcing irregularities 1 are formed by press molding, and when the convex portion 1a is used as a reference, the upper surface is an inclined surface that descends from the base portion toward the tip, and the width b = 15 to 25 mm and the length c = 5 to 10
mm, pitch p = 40 to 50 mm, and maximum height h = 2 to 4 mm.

Further, in the L-shaped cross-section 13, coupling holes 3a and 3b are scattered to facilitate the material flow at the time of molding and to prevent peeling of the coating layer (in the example shown, one for each reinforcing unevenness). It is provided.

Such a weather strip W supports the sheet metal insert 15 at a fixed position in the cavity C of the die, and PVC, PVC / N
A polymer elastic material such as BR polyblend or EPDM is injected into the cavity C and molded. The material is injected through a film gate 26 provided near the tip of the L-shaped cross section.

Since the reinforcing unevenness 1 is provided at the base of the L-shaped cross-section portion 13 of the sheet metal insert 15 and its rigidity is increased, when the polymeric elastic material is injected into the cavity in which the sheet metal insert is arranged, the sheet metal insert 15 Although the L-shaped cross-section portion 13 is subjected to a large injection pressure, it is not bent due to the reinforcing effect of the reinforcing unevenness 1, and this portion does not contact the mold surface. Further, during injection molding, the protrusion 14 for supporting the insert comes into contact with the mold surface to support that portion. However, the length in the width direction of the L-shaped cross-section portion 13 of the sheet metal insert is determined by the protrusion 14 in the seal lip portion 11. Since it is extended to the position where it reaches the opposing surface of the seal lip 11a, the protrusion 14 is hidden by the seal lip 11a and is not exposed at a portion visible from the outside.

Therefore, the sheet metal insert is not exposed at a portion visible from the outside of the weather strip W, and a weather strip having a good appearance can be obtained.

The weather strip W thus formed is found vertically at the front end of the rear door glass 8, and the seal lip 11
The seal lip 11a comes into contact with the front side door glass 9 for sealing and seals, but since the rigidity of the insert in the seal lip portion 11 is increased, the seal lip portion 11 is not easily deformed even at a high sealing pressure, which is excellent. A good sealing property can be retained for a long time.

In the above examples, when a material having a large internal shrinkage during material curing (for example, soft PVC) is used, sink marks (shrinkage) are likely to occur on the outside (molded product surface). In particular, when the connecting portion 1c between the convex portion 1a and the concave portion 1b is upright as shown in the figure, or when the coupling hole 3 is present in the convex portion 1a, they appear as patterned sink marks on the surface of the molded product. . In such a case, as shown in FIGS. 7 to 8, the sheet metal insert 15A has a gentle inclination of the connecting portion 1c (inclination angle α = 10 to 45 °), and the connecting hole 3a of the convex portion 1a is eliminated. That is, only the coupling hole 3b of the recess 1b is provided. At this time, on the surface I of the molded product on the inner surface side of the vehicle, the coupling hole formed in the recess 1b is formed.
The pattern of 3b appears, but it can be made inconspicuous by embossing.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention, FIG. 2 is an enlarged sectional view taken along the line II-II of FIG. 1, FIG. 3 is a perspective view of a sheet metal insert, and FIG. 4 is an automobile equipped with a weather strip. Right side view, FIG. 5 is an enlarged cross-sectional view of a conventional weather strip, and FIG. 6 is an explanatory view of the weather strip during injection molding. FIG. 7 is a perspective view showing another example of the sheet metal insert used in the present invention, and FIG. 8 is a sectional view taken along line VIII-VIII of FIG. 7 when the sheet metal insert of FIG. 7 is coated with a polymeric elastic material. It is a figure. 1 ... Reinforcing unevenness, 1a ... Projection, 3 ... Coupling hole, 11 ... Seal lip, 11a ... Seal lip, 12 ... U-shaped cross section, 13 ... L-shaped cross section, 14 ... Projection, 15,15A ... Sheet metal insert.

Claims (1)

[Scope of utility model registration request] 1. A seal lip portion which is vertically attached to a front end portion of a rear door glass or a rear side glass and seals a rear end portion of a front-side sashless door glass.
In a weather strip for a sashless door glass injection-molded from a polymeric elastic material using a sheet metal insert having an L-shaped cross section at the bottom of the L-shaped cross section, the L-shaped cross section inserted into the seal lip is roughly A protrusion for supporting the insert at the time of molding is provided at the tip, and the length of the L-shaped cross section in the width direction is extended to a position where the protrusion reaches a surface of the seal lip opposite to the seal lip. A weather strip for a sashless door glass, characterized in that a reinforcing unevenness is provided at the base of the cross section.