Vehicle door glass run and method for assembling the same

1. A vehicle door glass run, which is mounted on a window frame extending in a manner defining a window opening of a vehicle door from an exterior of a cabin, and seals between the window frame and a window glass, the vehicle door glass run comprising:

a glass run body having an insertion groove into which a glass run mount extending outward from an upper part of the window frame is inserted; and a trim strip assembled on an exterior part of the glass run body and extending in a front-rear direction of a vehicle, wherein

upper and lower parts of the trim strip are respectively provided with upper and lower trim-strip-side mating portions extending in a front-rear direction of the vehicle and configured to mate with the exterior part of the glass run body,

the exterior part of the glass run body is provided with body-side mating portions and an upper contacting portion, the body-side mating portions extending in the front-rear direction of the vehicle and being configured to mate with the upper and lower trim-strip-side mating portions, the upper contacting portion being formed of an elastic material and being configured to contact the upper trim-strip-side mating portion of the trim strip, and

the upper contacting portion has a portion contacting the trim strip and provided with a coating, and the coating has a kinetic friction coefficient, to the trim strip, lower than an elastic material forming a covered portion of the upper contacting portion by the coating.

2. The vehicle door glass run of claim 1 , wherein

an upper part of the exterior part of the glass run body is provided with an upper sealing lip projecting upward and configured to be bent outward and obliquely downward from the cabin upon contact with a vehicle body, and

the upper sealing lip has a base end having an exterior part provided with the upper contacting portion projecting outward.

3. The vehicle door glass run of claim 1 , wherein

the exterior part of the glass run body is provided with a lower contacting portion located below, and apart from, the upper contacting portion, the lower contacting portion being formed of an elastic material and being configured to contact the lower trim-strip-side mating portion of the trim strip, and

the lower contacting portion has a portion contacting the trim strip and provided with a coating, and the coating has a kinetic friction coefficient, to the trim strip, lower than an elastic material forming a covered portion of the lower contacting portion by the coating.

4. The vehicle door glass run of claim 1 , wherein

the coating has a thickness of equal to or greater than 0.005 mm and equal to or smaller than 0.5 mm.

5. The vehicle door glass run of claim 1 , wherein

the glass run body includes an upper plate portion extending along an upper surface of the glass run mount, a lower plate portion extending along a lower surface of the glass run mount, and an exterior plate portion extending from an exterior end of the upper plate portion to an exterior end of the lower plate portion, the insertion groove being formed between the upper plate portion and the lower plate portion, and

the upper plate portion, the lower plate portion, and the exterior plate portion are formed of a high-stiffness material having a flexural modulus ranging from 2000 MPa to 5000 MPa.

6. The vehicle door glass run of claim 5 , wherein

the body-side mating portion is integrally formed with the exterior plate portion.

7. The vehicle door glass run of claim 1 , wherein

the coating has a kinetic friction coefficient, to the trim strip, of 0.5 or less.

8. The vehicle door glass run of claim 1 , wherein

the exterior part of the glass run body is provided with a projection projecting toward the exterior of the cabin and configured to contact an interior surface of the trim strip.

9. A method of assembling a vehicle door glass run, which is mounted on a window frame extending in a manner defining a window opening of a vehicle door from an exterior of a cabin, and seals between the window frame and a window glass, the method comprising:

preparing a glass run body having an insertion groove into which a glass run mount extending outward from an upper part of the window frame is inserted, and a trim strip assembled on an exterior part of the glass run body and extending in a front-rear direction of a vehicle;

providing upper and lower parts of the trim strip with upper and lower trim-strip-side mating portions extending in a front-rear direction of the vehicle and configured to mate with the exterior part of the glass run body;

providing the exterior part of the glass run body with body-side mating portions extending in the front-rear direction of the vehicle and configured to mate with the upper and lower trim-strip-side mating portions, providing the exterior part of the glass run body with an upper contacting portion formed of an elastic material and configured to contact the upper

trim-strip-side mating portion of the trim strip, and providing the upper contacting portion with a portion contacting the trim strip and providing the portion with a coating;

having the coating have a kinetic friction coefficient, to the trim strip, lower than an elastic material forming a covered portion of the upper contacting portion by the coating; and

assembling the trim strip on the glass run body by mating the upper and lower trim-strip-side mating portions of the trim strip, from one ends of the upper and lower trim-strip-side mating portions of the trim strip, in a longitudinal direction, with one ends of the body-side mating portions of the glass run body in the longitudinal direction, and then, sliding the trim strip along the glass run body in the longitudinal direction.

10. The method of claim 9 , wherein

the trim strip is preliminarily curvedly shaped to fit a shape of the upper part of the window frame, and the glass run body is preliminarily linearly shaped, and

then, the assembling is performed.