Sheet processing apparatus and image forming system

Patent metadata

Field	Value
Publication number	US-9139399-B2
Application number	US-201414154580-A
Country	US
Kind code	B2
Filing date	Jan 14, 2014
Priority date	Jan 18, 2013
Publication date	Sep 22, 2015
Grant date	Sep 22, 2015

Abstract

A sheet processing apparatus comprises a pressurizing unit including a first pressurizing member and a second pressurizing member; and a moving unit moving the pressurizing unit and including a driving motor, wherein the position where a sheet bundle is pressurized by the first pressurizing member and the position where the sheet bundle is pressurized by the second pressurizing member are shifted in the direction of the fold line of the sheet bundle, and a driving condition of the driving motor is changed between a first orientation in which the pressurizing unit moves in the positional relation that the first pressurizing member precedes the second pressurizing member and a second orientation in which the pressurizing member moves in the positional relation that the second pressurizing member precedes the first pressurizing member.

First claim

What is claimed is:

1. A sheet processing apparatus, comprising:
a pressurizing unit configured to pressurize a fold line portion of a sheet bundle in a sandwiching manner between a first pressurizing member and a second pressurizing member; and
a moving unit configured to move the pressurizing unit in the direction of the fold line of the sheet bundle, the moving unit including at least a driving motor, wherein:
the position where the sheet bundle is pressurized by the first pressurizing member and the position where the sheet bundle is pressurized by the second pressurizing member are shifted in the direction of the fold line of the sheet bundle,
a driving condition of the driving motor is changed between a first orientation in which the pressurizing unit moves in the positional relation that the first pressurizing member precedes the second pressurizing member and a second orientation in which the pressurizing member moves in the positional relation that the second pressurizing member precedes the first pressurizing member, and
when the motor current flowing in the driving motor in the first orientation is assumed as I1 and the motor current flowing in the driving motor in the second orientation is assumed as I2, the driving condition of the driving motor is changed such that the relation in which I1>I2 is satisfied.

2. The sheet processing apparatus according to claim 1 , wherein
when the moving speed of the pressurizing unit in the first orientation is assumed as V1 and the moving speed of the pressurizing unit in the second orientation is assumed as V2, the driving condition of the driving motor is changed such that the relation in which V1<V2 is satisfied.

3. The sheet processing apparatus according to claim 2 , further comprising:
a sheet information acquiring unit configured to acquire sheet information, wherein
a first speed set value X and a second speed set value Y as set values of the moving speed of the pressurizing unit satisfy the relation in which X<Y,
a first operation mode satisfying the relation in which V1=X and V2=Y and a second operation mode satisfying the relation in which V1=Y and V2=Y are available, and
the first operation mode is executed when the sheet information satisfies a predetermined condition and the second operation mode is executed when the sheet information does not satisfy the predetermined condition.

4. The sheet processing apparatus according to claim 3 , further comprising a second-operation-mode propriety setting unit configured to allow a user to optionally set propriety of selection of the second operation mode.

5. The sheet processing apparatus according to claim 3 , further comprising a sheet information condition setting unit configured to allow a user to optionally set a predetermined condition of the sheet information used for changing between the first operation mode and the second operation mode.

6. The sheet processing apparatus according to claim 1 , further comprising:
a sheet information acquiring unit configured to acquire sheet information, wherein
a first current set value X and a second current set value Y as set values of the motor current of the driving motor satisfy the relation in which X>Y,
a first operation mode satisfying the relation in which I1=X and I2=Y and a second operation mode satisfying the relation in which I1=Y and I2=Y are available, and
the first operation mode is executed when the sheet information satisfies a predetermined condition and the second operation mode is executed when the sheet information does not satisfy the predetermined condition.

7. The sheet processing apparatus according to claim 6 , further comprising a second-operation-mode propriety setting unit configured to allow a user to optionally set propriety of selection of the second operation mode.

8. The sheet processing apparatus according to claim 6 , further comprising a sheet information condition setting unit configured to allow a user to optionally set a predetermined condition of the sheet information used for changing between the first operation mode and the second operation mode.

9. The sheet processing apparatus according to claim 1 , wherein
when it is assumed that an tangential direction of the first pressurizing member and the second pressurizing member is indicated by the tangential line at the touch point between the first pressurizing member and the second pressurizing member, and the angle of the line segment of the tangential direction formed from the line segment of the sheet thickness direction is indicated as θ, the angle θsatisfies 0[ ° ]<θ<90[ ° ].

10. The sheet processing apparatus according to claim 1 , wherein
the pressurizing unit performs pressurization on the fold line portion of the sheet bundle from a predetermined position within the sheet width to one end in the direction of the fold line of the sheet bundle and then performs pressurization on the part of the fold line portion not pressurized in the prior pressurization operation while moving back in the direction of the fold line of the sheet bundle.

11. An image forming system, comprising:
an image forming apparatus configured to form an image on a sheet; and
a sheet processing apparatus configured to perform folding processing on the sheet with the image formed by the image forming apparatus thereon, wherein
the sheet processing apparatus includes:
a pressurizing unit configured to pressurize a fold line portion of a sheet bundle in a sandwiching manner between a first pressurizing member and a second pressurizing member; and
a moving unit configured to move the pressurizing unit in the direction of the fold line of the sheet bundle, the moving unit including at least a driving motor, wherein
the position where the sheet bundle is pressurized by the first pressurizing member and the position where the sheet bundle is pressurized by the second pressurizing member are shifted in the direction of the fold line of the sheet bundle,
a driving condition of the driving motor is changed between a first orientation in which the pressurizing unit moves in the positional relation that the first pressurizing member precedes the second pressurizing member and a second orientation in which the pressurizing member moves in the positional relation that the second pressurizing member precedes the first pressurizing member, and
when the motor current flowing in the driving motor in the first orientation is assumed as I1 and the motor current flowing in the driving motor in the second orientation is assumed as I2, the driving condition of the driving motor is changed such that the relation in which I1>I2 is satisfied.

12. A sheet processing apparatus, comprising:
a pressurizing unit configured to pressurize a fold line portion of a sheet bundle in a sandwiching manner between a first pressurizing member and a second pressurizing member;
a moving unit configured to move the pressurizing unit in the direction of the fold line of the sheet bundle, the moving unit including at least a driving motor, wherein
the position where the sheet bundle is pressurized by the first pressurizing member and the position where the sheet bundle is pressurized by the second pressurizing member are shifted in the direction of the fold line of the sheet bundle,
a driving condition of the driving motor is changed between a first orientation in which the pressurizing unit moves in the positional relation that the first pressurizing member precedes the second pressurizing member and a second orientation in which the pressurizing member moves in the positional relation that the second pressurizing member precedes the first pressurizing member, and
when the mov

Assignees

• Hidaka Makoto
• Sano Takuya
• Watanabe Takao
• Saito Satoshi
• Satoh Shohichi
• Hoshino Tomomichi
• Kikuchi Atsushi
• Hata Kiyoshi
• Sugiyama Keisuke
• Ricoh Co Ltd

Inventors

• Hidaka Makoto
• Sano Takuya
• Watanabe Takao
• Saito Satoshi
• Satoh Shohichi
• Hoshino Tomomichi
• Kikuchi Atsushi
• Hata Kiyoshi
• Sugiyama Keisuke

Classifications

• B65H37/04

  for securing together articles or webs, e.g. by adhesive, stitching or stapling (adhering replacement to expiring web during change of web roll B65H19/18) · CPC title

• B31F1/00

  Mechanical deformation without removing material, e.g. in combination with laminating · CPC title

• B31F1/0035

  Straightening or flattening · CPC title

• B31F1/0006

  Bending or folding; Folding edges combined with joining; Reinforcing edges during the folding thereof; (creasing B31F1/08, crêping paper B31F1/12, corrugating B31F1/20; bending and joining B31F1/0045; reinforcing edges per se B31F5/08; making wound articles B31C, folding thin material per se B65H45/00) · CPC title

• B65H2801/27

  Devices located downstream of office-type machines · CPC title