Medium-holding device, medium-conveying device, and inkjet recording device

摘要

The present invention provides a medium-holding device capable of setting a suction pressure for each of various areas within a suction-holding surface, a medium-conveying device, and an inkjet recording device. In an embodiment of the invention, a cover is attached to a main body formed into a drum shape such that a surface of the cover functions as the suction-holding surface for a paper sheet. The cover has a plurality of suction apertures formed thereon from which suction apertures the paper sheet on the suction-holding surface is sucked. The suction apertures are arranged at a certain pitch. A specific suction aperture of them has a narrowing member attached thereto. The suction aperture having the narrowing member attached thereto has the suction pressure lowered. Therefore, by adjusting an arrangement of the specific suction aperture having the narrowing member attached thereto, the suction pressure can be partially controlled within the suction-holding surface.

主权项

1. A medium-holding device holding a sheet-shaped medium by suction, comprising:
a main body having a sucking part; a sucking device which sucks an inner side of the sucking part; a sheet-shaped cover which is attached to the main body and covers the sucking part to configure a suction-holding surface of the medium; a plurality of suction apertures formed to have the same diameter on the cover; and a narrowing member individually provided to a specific suction aperture of the plurality of suction apertures and for narrowing the specific suction aperture, the narrowing member including a narrowing flow path which is provided on a back surface of the cover and in communication with the specific suction aperture to narrow the specific suction aperture, wherein the narrowing member abuts on the main body when the cover is attached to the main body, wherein the narrowing member includes: a narrowing member main body having an abutment face on which the main body abuts; a communication hole formed to penetrate from the abutment face of the narrowing member main body to the specific suction aperture and formed concentrically with the specific suction aperture to have a diameter the same as the specific suction aperture; and a groove formed on the abutment face of the narrowing member main body and having one end formed to open on an outer peripheral surface of the narrowing member main body and the other end formed to open on an inner peripheral surface of the communication hole, wherein the abutment face of the narrowing member main body abuts on the main body such that an opening portion of the communication hole formed on the abutment face is blocked by the main body, and the narrowing flow path is defined by an opening portion of the groove formed on the abutment face and the main body.