Belt conveyor, media conveyor and printer

Abstract

The invention relates to a belt conveying device, a medium conveying device and a printer. A printer (1) includes a belt conveyance mechanism (18) mounted on a platen unit (8) facing a print head (7). In the belt conveyance mechanism (18), three conveyer belts (81) are hung on a belt drive roller (82a) and guide rollers (82b to 82d). The conveyor belt (81) is curved in a concave shape when viewed from the outside of the belt path at a position hung on the guide roller (82c). The guide rollers (82d) are located outside the belt path, and are in contact with the surface (transportation surface) of the concavely curved conveyor belt (81). An encoder (84) and an inertial member (85A) are attached to the rotating shaft (82e) of the guide roller (82d), and an inertial member (85B) is attached to the output shaft (83a) of the transport motor (83).

Description

technical field [0001] The invention relates to the technology of conveying sheet-like media with a conveyor belt. Background technique [0002] Devices such as printers and scanners that perform printing and reading information on sheet media are equipped with a belt conveyance mechanism (belt conveyance device) that conveys the medium using a conveyor belt that is suspended between rollers. Patent Document 1 discloses an image forming apparatus including such a belt conveyance mechanism. The image forming apparatus of Patent Document 1 transfers a toner image formed on a photoreceptor to an intermediate transfer belt to form a color image. The intermediate transfer belt is hung on three rollers of two pulleys and a belt conveying drive roller. A color image is transferred from the intermediate transfer belt to paper conveyed between one of the two pulleys and the secondary transfer drive roller. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2006-78906 [00...

AI Technical Summary

Problems solved by technology

[0005] However, the structure of Patent Document 1 is such that the driven roller is arranged so as to be in contact with the horizontally extending portion of the intermediate transfer belt, and it is necessary to provide a separate driven roller in addition to the roller that defines the belt path.

Therefore, the number of parts increases

In addition, although it is necessary to maintain the pressing pressure to the extent that no slip occurs between the intermediate transfer belt and the driven roller, if the pressing pressure is higher than the normal requirement, the conveying load will increase

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