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Strike down mechanism for sheet processing device

  • US 7,159,860 B2
  • Filed: 12/10/2004
  • Issued: 01/09/2007
  • Est. Priority Date: 09/28/2004
  • Status: Active Grant
First Claim
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1. A sheet post-process apparatus, comprising:

  • a plurality of rollers configured to receive and convey sheets conveyed from an MFP main body;

    a waiting tray which is provided at some midpoint of a conveying path, and is configured to cause a sheet conveyed from the rollers to be in a waiting state when a post-process is required, the waiting tray including a pair of waiting tray parts arranged at a predetermined interval in a transverse direction orthogonal to a sheet conveying direction;

    an adjustment mechanism for adjusting the predetermined interval between the pair of waiting tray parts in accordance with a width of the sheet, the predetermined interval being set to a first width smaller than a width of the sheet orthogonal to the sheet conveying direction for loading the sheet being in the waiting state and to a second width larger than the width of the sheet;

    a processing tray configured to receive the sheet conveyed from the waiting tray and a sheet conveyed from the rollers without staying at the waiting tray having the pair of waiting tray parts set to the second width before performing the post-process;

    a strike-down mechanism provided above the waiting tray and configured to strike the sheet loaded in the waiting tray down on the processing tray, the strike-down mechanism comprising;

    a strike-down member for giving a downward force at a center portion of the sheet to make the sheet bent and fall down to the processing tray by a self weight of the sheet;

    a solenoid; and

    a plunger which is sucked and ejected in accordance with magnetic excitation and non-excitation of the solenoid,wherein the strike-down member is supported at one end of the plunger while freely rotated;

    an alignment mechanism configured to align sheets on the processing tray to form a bundle of sheets;

    a post-process mechanism configured to perform the post-process of the bundle of sheets aligned on the processing tray;

    a sheet conveying unit configured to convey the bundle of sheets to which the post-process has been performed from the processing tray; and

    a storage tray configured to load the conveyed bundle of sheets thereon.

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