Sheet finishing apparatus

• US 7,364,149 B2
• Filed: 03/22/2005
• Issued: 04/29/2008
• Est. Priority Date: 03/22/2005
• Status: Expired due to Fees

• Current Assignee: Toshiba Tec Corporation (Toshiba Corporation)
• Original Assignee: Toshiba Tec Corporation (Toshiba Corporation)
• Inventors: Terao, Yasunobu, Taki, Hiroyuki, Yamamoto, Hajime, Kawaguchi, Takahiro, Sugizaki, Yoshiaki
• Primary Examiner(s): Crawford; Gene O.
• Assistant Examiner(s): NICHOLSON III, LESLIE AUGUST
• Application Number:
  US11/085,257
• Publication Number:
  US 20060214344A1
• Time in Patent Office: 1,134 Days
• Field of Search: 270/58.08, 270/58.09, 270/58.1, 270/58.11, 270/58.12, 270/58.13, 270/58.14, 270/58.15, 270/58.16, 270/58.17, 270/58.19, 270/58.28, 399/124, 399/125, 399/407, 399/408, 399/410
• US Class Current: 270/58.13
• CPC Class Codes: B65H 2402/441 movable for facilitating access to area inside the housing, e.g. pivoting or sliding
• CPC Class Codes: B65H 2404/63 Oscillating, pivoting around an axis parallel to face of material, e.g. diverting means
• CPC Class Codes: B65H 2601/11 Clearing faulty handling, e.g. jams
• CPC Class Codes: B65H 2801/27 Devices located downstream of office-type machines
• CPC Class Codes: B65H 29/14 and introducing into a pile
• CPC Class Codes: B65H 31/24 multiple or compartmented, e.d. for alternate, programmed, or selective filling

Abstract

A sheet finishing apparatus of the present invention takes in sheets of paper ejected from an image forming apparatus through a taking-in port and clamping and conveying the sheets of paper by a pair of pinch rollers for post processing, has a sheet guidance member which supports one of the pair of pinch rollers and can rotate between a first position where the one pinch roller and the other pinch roller make contact with each other and a second position where the one pinch roller is released from the other pinch roller, and furthermore includes a tray for loading the sheets of paper conveyed by the pair of pinch rollers and an assist arm which is attached rotatably to the sheet guidance member and when the one pinch roller and the other pinch roller are in contact with each other, is projected in the direction for pressing the sheets of paper in the tray and when the one pinch roller is released from the other pinch roller, is rotated in the opposite direction.

Claims

1. A sheet finishing apparatus, comprising:

a conveying path in which a sheet of paper ejected from an image forming device is carried from a receiving port, and a pair of pinch rollers pressed against each other so as to make contact closely with each other and convey the sheet of paper for post process;

a sheet guidance member that supports one of the pair of pinch rollers, and is turnable between a first position where one of the pinch rollers and the other pinch roller contact with each other and a second position where the one of the pinch rollers is released from the other pinch roller;

a tray used for loading the sheet of paper conveyed by the pair of pinch rollers; and

an assist arm mounted in the sheet guidance member in a rotatable manner that makes contact with the sheet of paper being conveyed,

wherein the assist arm rotates in correspondence with movement of the pinch rollers, in a manner that, in a state where the tray is closed, the assist arm rotates in a direction in which one end thereof presses the sheet of paper, and in a state where the tray is open, the assist arm rotates in an opposite direction; and

wherein

the assist arm has an arm extending from one end side, a holder that holds a rotation center axis of the pinch rollers in a rotatable manner on the other end, and a fulcrum provided at a position distant from the holder, wherein the fulcrum can be attached to the sheet guidance member and the assist arm can be rotated centering on the fulcrum.

2. A sheet finishing apparatus, comprising:

a conveying path in which a sheet of paper ejected from an image forming device is carried from a receiving port, and a pair of pinch rollers pressed against each other so as to make contact closely with each other and convey the sheet of paper for post process;

a sheet guidance member that supports one of the pair of pinch rollers, and is turnable between a first position where one of the pinch rollers and the other pinch roller contact with each other and a second position where the one of the pinch rollers is released from the other pinch roller;

a tray used for loading the sheet of paper conveyed by the pair of pinch rollers; and

an assist arm mounted in the sheet guidance member in a rotatable manner that makes contact with the sheet of paper being conveyed,

wherein the assist arm rotates in correspondence with movement of the pinch rollers, in a manner that, in a state where the tray is closed, the assist arm rotates in a direction in which one end thereof presses the sheet of paper, and in a state where the tray is open, the assist arm rotates in an opposite direction; and

Wherein the arm operates so as to press a rear end of the sheet of paper to prevent the sheet of paper from an undesirable position at the time where the pinch rollers make contact with each other in a state where the sheet guidance member is closed in correspondence with opening and closing the tray,

the assist arm rotates centering on the fulcrum when the sheet guidance member moves to an open state in correspondence with the opening and closing of the tray, and

a front end of the arm is prevented from a collision with a shaft of the pinch rollers when the sheet guidance member is closed again, since the arm has moved in a predetermined direction already.