JPS5621171A - Fixing device of copying machine - Google Patents

Abstract

PURPOSE: To enable the pressure-contact width between both rolls to be adjusted by pivotally supporting either one of a fixing roll or pressure roll by the bearings having an inside diameter deviated from the outside diameter.

CONSTITUTION: The fulcrum shaft 2a of a fixing roll 2 via bearings 3 and a pressure roll 4 diametrically opposing thereto are supported between frames 1, respectively freely rotatably. The fulcrum supporting sections A of the frames 1 and the pressure roll 4 are made into the constitution in which cylindrical housings 6 having flanges 5 are inserted and mounted rotatably in the supporting holes 1a of the frames. The center (a) of the inside circumferential face 6a of the housings 6 is deviated by (e) with respect to the center (b) of the outside circumferential surface 6b. Arc-shaped grooves 8 centering at the center (b) of the outside circumferential surface are provided to the flanges 5 to fix the housing 6 to the frames 1. If the housing 6 is turned in the arrow (a) direction by loosening bolts 9, the pressure roller 4 moves in the direction of coming into press-contact with the fixing roller 2, thereby increasing the press-contact width.

COPYRIGHT: (C)1981,JPO&Japio