Printing apparatus, sheet processing apparatus, and sheet winding device

摘要

A device includes a winding rotary member having a cylindrical shape; a holder having a rotating member, which is provided in the vicinity of a cylindrical surface of the winding rotary member, capable of nipping and conveying the sheet; a first driving mechanism configured to rotate the winding rotary member; and a second driving mechanism configured to rotate the rotating member. The winding rotary member rotates with the sheet is nipped with the rotatable holder, whereby the sheet is wound around the winding rotary member.

主权项

1. A device capable of winding a sheet thereupon, the device comprising:
a winding rotary member having a cylindrical shape; a holder having a rotating member that is provided in a vicinity of a cylindrical surface of the winding rotary member, wherein the holder is capable of nipping and conveying a sheet; a detecting unit configured to detect an initial position of rotation of the winding rotary member relative to a lead-in path for the sheet to be lead into an internal space within the winding rotary member; a first driving mechanism configured to rotate the winding rotary member; and a second driving mechanism configured to rotate the rotating member, wherein the first driving mechanism rotates the winding rotary member with the sheet nipped by the holder, whereby the sheet is wound around the winding rotary member, wherein the first driving mechanism and the second driving mechanism operate at the same time, wherein the second driving mechanism coordinates rotation of the holder with rotation of the winding rotary member so that the holder draws the sheet into the internal space while the sheet is wound around the winding rotary member to reduce a possibility of a loop caused on a section of the sheet before the section of the sheet reaches the winding rotary member, and wherein, after a state in which the first driving mechanism and the second driving mechanism operate at the same time, the first driving mechanism continues its operation and the second driving mechanism stops its operation, whereby the holder stops drawing the sheet into the winding rotary member while the sheet is wound around the winding rotary member, wherein the winding rotary member is configured such that, a sheet winding speed, determined by a rotating speed of the winding rotary member, is maintained at a speed that is greater than a sheet conveying speed of the sheet received by the winding rotary member, whereby a whole sheet conveying speed principally is determined by the speed of the sheet conveying speed of the sheet to the winding rotary member.