JPS626883Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a glass run installed around the window frame of an automobile having an elevating window glass.

Conventionally, most glass runs have had main bodies molded from an elastic member such as rubber or synthetic resin, and had electrostatic flocking applied to the sliding portions with the window glass. This electrostatically flocked glass run is expensive, and when it is slid against a window glass for a long time, hair loss occurs, and the base material of the glass run is exposed.
There was a risk that the sliding resistance of the window glass would increase.

Therefore, as shown in FIG. 1, it was devised that a polyolefin resin layer 5 having a small coefficient of friction and excellent wear resistance was heat-sealed to the sliding portion of the lip portion 4 against the window glass G. The tip of the lip portion 4 is bent toward the side wall portion 3 in order to minimize the glass sucking phenomenon when the vehicle is running at high speed.
(Refer to Utility Model Publication No. 50-12804) However, in this glass run, when the window glass G shifts from the center of the glass run, the tip of the lip portion 4 is pressed against the side wall portion 3, but the gap between the lip portion 4 and the side wall portion 3 is Since the coefficient of friction is extremely high, no slippage occurs between the two, and the deformation load of the lip portion 4 becomes substantially the deflection load of the lip portion 4 in which both are fixed. (The deformation load at the normal position of the glass is the deflection load at the base of the lip portion 4.) However, since the lip portion 4 is provided with the highly rigid polyolefin resin layer 5, this deformation load becomes extremely large. . This deformation load acts as a force F that causes the lip portion 4 to push back the glass G, resulting in an increase in the sliding resistance of the glass G.

In view of the above, this invention aims to provide a glass run in which the sliding resistance of the window glass does not increase even when a polyolefin resin layer is heat-sealed to the sliding part of the lip part with the window glass. purpose.

The gist of this invention is that it is made of an elastic member such as rubber or synthetic resin, and includes a base, a side wall that continuously extends upward from both ends of the base, and a tip that extends inward from the upper end of the side wall. In a glass run having a lip part bent toward the side wall part and a polyolefin resin layer heat-sealed to the sliding part with the window glass, the surface facing the tip of the lip part of the side wall part. This is an automotive glass run in which a polyolefin resin layer is heat-sealed.

An embodiment of this invention will be described below with reference to the drawings.

As shown in FIG. 2, the glass run 1 has a base 2
A side wall portion 3 that extends continuously upward from both ends of the base portion 2, and a lip portion 4 that bends and extends inward from the upper end of the side wall portion 3 are integrally formed of rubber such as EPDM. The tip of this lip portion 4 is connected to the side wall portion 3 in order to minimize the glass suction phenomenon.
bent in the direction. Window glass G of lip part 4
A polyolefin resin layer 5 made of polyethylene resin, polypropylene resin, etc., which has excellent abrasion resistance and low sliding resistance, is applied by thermal fusion to the sliding portion of the base 2 and the surface of the side wall 3 facing the tip of the lip portion 4. This is the formed configuration.

Note that in this embodiment, a recess is formed in the side wall portion 3,
Although the polyolefin resin layer 5 is heat-sealed to this recess, the polyolefin resin layer 5 may be heat-sealed to the surface of the side wall 3 without forming a recess in the side wall 3.

Since the glass run of this invention has the above-mentioned configuration, even if the tip of the lip is pressed against the side wall when the window glass slides off the center of the glass run,
Since a polyolefin resin layer having a small coefficient of friction is heat-sealed to the surface of the side wall facing the tip of the lip, the tip of the lip slides on the resin layer.
Therefore, the sliding resistance of glass (proportional to the deformation load at the lip) is substantially controlled by the deflection load at the root of the lip, and even if a highly rigid polyolefin resin layer is provided at the lip, the sliding resistance will be reduced. A low automotive glass run can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing a conventional glass run for an automobile mounted on a window frame, and FIG. 2 is a cross-sectional view of a glass run for an automobile showing an embodiment of this invention. DESCRIPTION OF SYMBOLS 1... Glass run, 2... Base, 3... Side wall part, 4... Lip part, 5... Polyolefin resin layer.

Claims (1)

[Scope of utility model registration request] It is made of an elastic member such as rubber or synthetic resin, and includes a base, a side wall that continuously extends upward from both ends of the base, and a side wall that extends inward from the upper end of the side wall, with its tip bent toward the side wall. In a glass run having a lip part in which a polyolefin resin layer is heat-sealed to the sliding part with the window glass, a polyolefin resin is applied to a surface of the side wall part facing the tip of the lip part. An automotive glass run characterized by heat-sealing layers.