To solve various problems such as scattering of sheets, deformation of loaded sheets, unstableness of sheets to be supplied, etc. in case where sheets having a large size such as, for example, A3 size exceeding A4 size are loaded and supplied and control a lift position of a right tray and a left tray so that an uppermost face of the large sized sheet on the left tray and an uppermost face of the large sized sheet on the right tray come to substantially the same height in non-tandem paper supply using a cantilever system and a wire system as paper supply tray lifting system.
This paper supply device is provided with a right tray unit 4 provided with a horizontal lifting means, etc., a left tray unit 5 provided with a lifting and interlocking means, and a controller 95 controlling right and left stepping motors 41A, 41B so that a height of large sized sheet on an uppermost face on the right tray 1 and a height of large sized sheet on an uppermost face on the left tray 2 become substantially the same height based on each paper surface height detection signal from each paper surface detection sensor 54, 58.
AIZAWA HIDETOSHI
ENDO KENJI
ASHIGAYA NAOKI
YAKUWA KIYOHIKO
SHIMA MASAYUKI
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