SHEET FINISHING APPARATUS

• US 20080211161A1
• Filed: 03/14/2008
• Published: 09/04/2008
• Est. Priority Date: 03/22/2005
• Status: Active Grant

• Current Assignee: Toshiba Tec Corporation (Toshiba Corporation)
• Original Assignee: Toshiba Tec Corporation (Toshiba Corporation)
• Inventors: Taki, Hiroyuki, Yamamoto, Hajime, Sugizaki, Yoshiaki, TERAO, Yasunobu, Iijima, Tomomi
• Granted Patent: US 7,591,455 B2
• Time in Patent Office: Days
• US Class Current: 270/58.09
• CPC Class Codes: B42C 1/12 Machines for both collating or gathering and permanently attaching together the sheets or signatures
• CPC Class Codes: B65H 2301/422615 from opposite part-support elements, e.g. operated simultaneously
• CPC Class Codes: B65H 29/34 from supports slid from under the articles
• CPC Class Codes: B65H 31/24 multiple or compartmented, e.d. for alternate, programmed, or selective filling
• CPC Class Codes: B65H 31/26 Auxiliary devices for retaining articles in the pile
• CPC Class Codes: B65H 31/3018 from opposite part-support elements, e.g. operated simultaneously

Abstract

In a sheet finishing apparatus of the present invention, when temporarily loading a plurality of sheets of paper on a standby tray until a processing tray finishes processing, to prevent a sheet of paper loaded first from being pressed out by a sheet of paper ejected later, a chuck for retaining the rear ends of the sheets of paper is installed on the downstream side of the standby tray, and for curled sheets of paper, a standby tray guide and an arm member for suppressing curling of the central part of the sheets of paper are installed, thus matching on the standby tray is stabilized.

Claims

1. A sheet finishing apparatus for post-processing sheets of paper after image forming, comprising:

a pair of paper supply rollers that receives and conveys sheets of paper ejected from an image forming apparatus,

a standby tray that makes said sheets of paper ejected from said paper supply rollers stand by,

a processing tray arranged under said standby tray that loads said sheets of paper dropped and supplied from said standby tray and/or said sheets of paper ejected from said image forming apparatus not via said standby tray,

a processing mechanism that post-processes said sheets of paper loaded on said processing tray,

a paper ejection tray that loads said post-processed sheets of paper ejected from said processing tray,

a standby tray guide extending over the standby tray that controls movement and posture of said sheets of paper ejected from said paper supply rollers to said standby tray and born rotatably on a side of said standby tray and a front end of the standby tray guide being heavy and rounded so as to crush upward curls of said sheets of paper, and

an assist arm configured to prevent a rear end side of said sheets of paper conveyed powerfully from said paper supply rollers from rising and to press the rear end of said sheets of paper to the standby tray, a side of said assist arm in contact with said sheets of paper being formed heavy to prevent the sheets of paper from unexpected movement.

2. The sheet finishing apparatus according to claim 1, wherein a chuck that retains said rear ends of said sheets of paper is installed on the downstream side of said standby tray.

3. The sheet finishing apparatus according to claim 1, wherein said standby tray guide is arranged left and right of said sheets of paper almost in accordance with a width of said sheets of paper.

4. The sheet finishing apparatus according to claim 1, wherein said assist arm is born rotatably by a mounting shaft of said paper supply rollers.

5. The sheet finishing apparatus according to claim 1, wherein said assist arm is in a lever shape.

6. The sheet finishing apparatus according to claim 3, wherein said assist arm is arranged between said right and left standby tray guides.

7. The sheet finishing apparatus according to claim 3, wherein a plurality of said assist arms each of a similar or same shape is arranged and said adjacent assist arms are connected mutually.

8. The sheet finishing apparatus according to claim 1, wherein said processing mechanism is a stapler for bundling the plurality of sheets loaded on said processing tray.

9. The sheet finishing apparatus according to claim 1, wherein said standby tray is composed of at least a pair of tray members for respectively supporting both sides of said sheets and slides and moves said tray members to drop and feed said sheets onto said processing tray.

10. The sheet finishing apparatus according to claim 1, wherein said paper ejection tray can load said sheets ejected from said standby tray not via said processing tray.

11. A sheet finishing apparatus for post-processing sheets of paper after image forming, comprising:

means for receiving and conveying sheets of paper ejected from an image forming apparatus,

means for making said sheets of paper ejected from said means for receiving and conveying sheets stand by,

means for loading said sheets of paper dropped and supplied from said means for making sheets standby and/or said sheets of paper ejected from said image forming apparatus not via said means for making sheets standby, arranged under said means for making sheets standby,

means for post-processing said sheets of paper loaded on said means for loading sheets,

means for loading said post-processed sheets,

means for controlling movement and posture of said sheets of paper ejected from said means for receiving and conveying sheets to said means for making sheets standby, extending over said means for making sheets standby and born rotatably on a side of said means for making sheets standby, having a front end thereof being heavy and rounded so as to crush upward curls of said sheets of paper, and

means for preventing a rear end side of said sheets of paper conveyed powerfully from said means for receiving and conveying from rising by pressing rear ends of said sheets of paper to said means for making sheets standby, a side of the means for preventing a rear end side of said sheets of paper from rising being in contact with said sheets of paper being formed heavy to prevent the sheets of paper from unexpected movement.

12. The sheet finishing apparatus according to claim 11, wherein a chuck that retains said rear ends of said sheets of paper is installed on the downstream side of said means for making sheets standby.

13. The sheet finishing apparatus according to claim 11, wherein said means for controlling is arranged left and right of said sheets of paper almost in accordance with a width of said sheets of paper.

14. The sheet finishing apparatus according to claim 11, wherein said means for pressing is born rotatably by a mounting shaft of said means for receiving and conveying sheets.

15. The sheet finishing apparatus according to claim 11, wherein said means for pressing is in a lever shape.

16. The sheet finishing apparatus according to claim 13, wherein said means for pressing is arranged between said right and left means for controlling.

17. The sheet finishing apparatus according to claim 13, wherein a plurality of said means for pressing each of a similar or same shape is arranged and said adjacent means for pressing are connected mutually.

18. The sheet finishing apparatus according to claim 11, wherein said means for post-processing is a stapler for bundling the plurality of sheets loaded on said means for loading sheets.

19. The sheet finishing apparatus according to claim 11, wherein said means for making sheets standby is composed of at least a pair of tray members for respectively supporting both sides of said sheets and slides and moves said tray members to drop and feed said sheets onto said means for loading sheets.

20. The sheet finishing apparatus according to claim 11, wherein said means for loading post-processed sheets can load said sheets ejected from said means for making sheets standby not via said means for loading sheets.

21. A control method for a sheet finishing apparatus, comprising:

conveying sheets of paper via a pair of paper supply rollers,

standing by said sheets of paper ejected from said paper supply rollers by a standby tray,

loading said sheets of paper onto a processing tray by being dropped and supplied from said standby tray,

post-processing said sheets of paper loaded on said processing tray,

controlling movement and posture of said sheets of paper ejected from said paper supply rollers to said standby tray by a standby tray guide extending over the standby tray and born rotatably on a side of said standby tray, with a front end of the standby tray guide being heavy and rounded so as to crush upward curls of said sheets of paper,

preventing a rear end side of the sheets of paper conveyed powerfully from said paper supply rollers from rising by an assist arm, and

pressing the rear end of said sheets of paper to said standby tray by the assist arm, with a side of the assist arm in contact with said sheets of paper, being formed heavy to prevent the sheets of paper from unexpected movement.