JP2003226458A - Paper post-treatment device and image forming device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To quickly and stably load record paper having a toner image fixed thereon discharged from an image forming device and prevent a spot on recording paper due to sticking of a toner image and a toner image, grazing of a toner image or the like in a case of a plurality of record paper having toner images formed on both sides. <P>SOLUTION: In a post-treatment device including an inlet conveyor part 10 receiving a paper sheet S discharged from an image forming device A and conveying the same, a collecting part 30 receiving the paper sheet S conveyed by the inlet conveyor part 10 and having the same loaded thereon, and a paper feeding device storing a cover sheet K and sending and conveying the same to the collecting part 30 one by one, the paper feeding device sending out the cover sheet K in a cover sheet storing part 51 one by one by an air sucking means 57 and an air sending means 72 sending exhaust air of the air sucking means 57 to the inlet conveyor part 10. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrophotographic copying machine,
Recording sheets discharged after image formation from an image forming apparatus such as a printer, a facsimile, and a multifunction machine having these functions are sequentially taken into a sheet post-processing apparatus, and post-processing such as binding processing is performed on the recording sheets. The present invention relates to a sheet post-processing device having a function of discharging to a sheet discharge unit.

[0002]

2. Description of the Related Art A sheet post-processing device called a finisher is used as a device for collating a plurality of image-recorded recording sheets discharged from an image forming apparatus for each number of copies and binding them by stapling means. .

This paper post-processing apparatus is connected in function to the main body of an image forming apparatus such as a copying machine or a printer, and is driven in response to a sequence operation of a copying or printing process.

Therefore, for an image forming apparatus capable of processing the image forming process at high speed, a sheet post-processing apparatus capable of high speed processing capable of following the processing speed and performing its function is required. It

Regarding such a sheet post-processing apparatus, there are already Japanese Patent Laid-Open Nos. 60-142359 and 60-15846.
No. 3, 62-239169, and JP-A-62-28.
8002, 63-267667, JP-A-2-27
6691, JP-A-8-319054, JP-B-5-4
It is disclosed in each publication of 1991.

The bookbinding apparatus disclosed in Japanese Patent Laid-Open No. 60-183459 has a cover sheet feeding device, and performs bookbinding finishing such as stapling after superposing the copy sheet group and the cover sheet.

[0007]

The conventional sheet post-processing apparatus has the following problems.

The recording paper on which a toner image is formed in the image forming portion of the image forming apparatus and which is heated by the fixing device and the toner image is fixed is discharged from the paper discharging portion to the outside of the apparatus and connected to the image forming apparatus. It is introduced into the entrance conveyance section of the sheet post-processing device.

When the post-processing is performed on the introduced plural recording sheets, the post-processing such as the superposing process, the aligning process, and the binding process is performed in the stacking unit.

Alternatively, the introduced recording sheets are stacked on the sheet discharge tray after the shift processing in which the recording sheets are moved in the direction orthogonal to the sheet conveying direction. Alternatively, the sheets are stacked on the paper ejection tray without performing post-processing.

The recording paper discharged from the image forming apparatus is
If the toner image is not stably fixed and is stacked on the stacking unit and the discharge tray, the unfixed toner image is transferred to another recording paper, or the upper and lower recording papers are not fixed. It may stick depending on the image. Further, the curl of the recording paper discharged from the image forming apparatus is large, and the recording paper becomes non-uniform when a large amount of recording paper is stacked on the stacking unit or the paper discharge tray or when the alignment process is performed. There is.

Further, due to the defective stacking of the recording sheet bundle due to the curling of the recording sheet, the stable binding process is not executed, and the finished appearance quality of the recording sheet bundle is deteriorated due to the misalignment of the recording sheet.

[0013]

The above-mentioned problems in the binding process are solved by the following sheet post-processing device and image forming device.

(1) An entrance conveyance section for receiving and conveying the recording paper discharged from the image forming apparatus, a stacking section for receiving and stacking the recording paper conveyed by the entrance conveyance section, and the recording paper In a sheet post-processing apparatus having a sheet feeding unit for feeding sheets one by one from a sheet storing unit for storing sheets different from the above, an air for feeding the sheets in the sheet storing unit one by one. A sheet post-processing apparatus comprising: a suction unit and an air blowing unit that sends the exhaust air of the air suction unit to the inlet conveyance unit.

(2) An entrance conveyance section for receiving and conveying the recording paper discharged from the image forming apparatus, a stacking section for receiving and stacking the recording paper conveyed by the entrance conveyance section, and the recording paper In a sheet post-processing apparatus having a sheet feeding unit that feeds sheets one by one from a sheet storage unit that stores different sheets to the stacking unit, the bending of the recording sheet provided in the entrance transport unit is removed. And a blower that blows the exhaust air of the air suction unit to the paper flexure removing unit. Paper post-processing device.

(3) A sheet post-processing apparatus having the sheet feeding device and the air blowing unit described in (1), or a sheet post-processing having the sheet deflection removing unit, the sheet feeding device, and the air blowing unit described in (2). An image forming apparatus comprising: an apparatus.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a sheet post-processing apparatus of the present invention,
An embodiment of an image forming system including an image forming apparatus including a sheet post-processing apparatus will be described with reference to the accompanying drawings.

[One Embodiment of Image Forming Apparatus] FIG. 1 is an overall configuration diagram of an image forming system including an image forming apparatus A, an image reading apparatus B, and a sheet post-processing apparatus (hereinafter referred to as a post-processing apparatus) FS. .

In the image forming apparatus A, a charging unit 2 and an image exposing unit (image writing unit) are provided around a rotating image carrier 1.
3, an image forming unit in which a developing unit 4, a transfer unit 5A, a charge eliminating unit 5B, and a cleaning unit 6 are arranged. The image forming unit uniformly charges the surface of the image carrier 1 by the charging unit 2 and then performs exposure scanning based on the image data read from the original by the laser beam of the image exposing unit 3 to form a latent image. Then, the latent image is reversely developed by the developing means 4 to form a toner image on the surface of the image carrier 1.

On the other hand, a recording sheet (hereinafter referred to as a sheet) S fed from a sheet feeding cassette 7A arranged in the middle stage of the image forming apparatus A has a first sheet feeding section Y1 and a second sheet feeding section (registration sheet). It is sent to the transfer position via the roller pair) 7F. The paper S fed from the paper feed cassette 7B is also fed to the first paper feed section Y2,
It is sent to the transfer position via the second paper feed unit 7F.

The paper S fed from the first paper feed section Y3 of the large-capacity paper feed tray 7C arranged at the lower stage of the image forming apparatus A and the first paper feed section Y4 of the large-capacity paper feed tray 7C are fed. The printed sheet S is fed to the second sheet feeding unit 7F.

The paper S fed from the first paper feed section Y5 of the manual paper feed tray 7E is fed to the second paper feed section 7F.

At the transfer position, the toner image is transferred onto the paper S by the transfer means 5A. After that, the electric charge on the back surface of the sheet S is erased by the charge removing unit 5B, and the image carrier 1
The sheet is separated from the sheet, is conveyed by the reverse conveying section 9C, is subsequently heated and fixed by the fixing means 8, and is discharged by the sheet discharge roller section 9A.

When images are formed on both sides of the paper S,
The sheet S heated and fixed by the fixing unit 8 is branched from the normal sheet discharge path by the conveyance path switching plate 9B, switched back at the reversal conveyance section 9C to reverse the front and back sides, and then passes through the image forming section again, so that the sheet Form an image on the back of S,
After passing through the fixing unit 8, the sheet is discharged to the outside of the apparatus by the sheet discharge roller 9A. The paper S discharged by the paper discharge roller 9A is sent to the receiving portion of the post-processing device FS.

On the other hand, the surface of the image carrier 1 after image processing is
The developer remaining on the surface is removed by the cleaning unit 6 to prepare for the next image formation.

[Automatic Document Feeding Device] On the upper part of the image forming apparatus A, an automatic document feeding device D of a moving original type is adopted.
F is installed.

The uppermost document d of the stack of documents stacked on the paper feed tray is fed by the first paper feed unit Y6 including a feed roller, a paper feed roller, and a double feed prevention roller, and a second paper feed unit. Is sent to the transport drum via. The document d is wound around the outer peripheral surface of the conveying drum, and the document image is read by the image reading device B at the reading position.

[Construction of Post-Processing Apparatus] The post-processing apparatus FS connected to the image forming apparatus A includes an entrance conveyance section 10, a shift processing section 20, a stacking section 30, a binding means (stapling means) 4
0, a cover sheet feeding section 50, and a sheet discharging section 60.

The entrance conveyance section 10 conveys the sheet S discharged from the image forming apparatus A to each processing section. Shift processing unit 20
Shifts the sheet S conveyed from the entrance conveyance section 10 into a shift process and discharges the sheet S to an elevating and lowering tray 62, which will be described later. Accumulator 30
Stacks the sheets S conveyed from the entrance conveyance section 10 and performs binding processing by the binding unit 40 described later. The cover sheet feeding unit 50 feeds a cover sheet (hereinafter referred to as a cover sheet) K and conveys it to the shift processing unit 20 or the stacking unit 30.

The paper discharge unit 60 directly discharges and stores the paper S discharged from the image forming apparatus A via the entrance conveyance unit 10 without post-processing, a shift process or an end. An elevating and discharging tray 6 for accommodating the bound sheet bundle Sa
2, a pair of discharge rollers 63, and a swing means 64.

[Paper Conveying Path and Upper Mechanism of Post-Processing Apparatus] FIG. 2 is a schematic view showing the sheet conveying path of the post-processing apparatus FS, and FIG. 3 is a sectional view showing the upper mechanism of the post-processing apparatus FS.

In the post-processing apparatus FS, the receiving section 11 for the sheet S carried out from the image forming apparatus A is the sheet discharging section 7 of the image forming apparatus A.
It is installed by adjusting the position and height so that it matches C.

A sheet S connected to the downstream side of the inlet roller pair 12A and the intermediate roller pair 12B of the receiving section 11 in the sheet conveying direction.
Is divided into three systems, an upper first transport path, an intermediate second transport path, and a lower third transport path, and the paper S is selected by selecting the angle occupied by the switching means G1 and G2.
Are fed to one of the transport paths.

(Cover Sheet Feeding) The cover sheet feeding section 50 includes a cover sheet placing section (sheet receiving section) 51, a movable bottom plate 52, and a lifting lever 53, a drive roller 54, a driven roller 55, Paper feeding belt 5
6, cover sheet feeding means including air suction means 57 and the like.

With respect to the cover sheet K accommodated in the cover sheet placing section, one sheet of cover sheet K is separated and conveyed by the rotating sheet feeding belt 56 and the suction pressure by the air suction means 57, and passes through the passage 58. After passing through the nipping position between the driving roller 14A and the driven roller 14C of the conveying roller pair 14, passing through the passage 19 and the conveying roller pair 18, the conveying roller pair 3 of the third passage is formed.
2, the path 33, and the registration roller pair 34 to reach the sheet mounting table 35.

The conveying roller pair 14 is the drive roller 1 at the center.
4A and two driven rollers 14B and 14C that are in pressure contact with the drive roller 14A. When the drive roller 14A is driven to rotate to the left in the figure, the driven roller 14B rotates to the right and conveys the sheet S conveyed from the path 13 upward. At the same time, the driven roller 14C also rotates to the right to convey the cover sheet K conveyed from the passage 58 to the passage 19 below. Therefore, by the drive rotation of the drive roller 14A, the first
It is possible to simultaneously transport the paper S on the transport path and the cover sheet K on the fourth transport path in opposite directions.

(Sheet discharged to the upper sheet discharge tray) The image-formed sheet S discharged from the image forming apparatus A
Is introduced into the receiving section 11, is conveyed by the pair of entrance rollers 12A and the pair of intermediate rollers 12B, and the entrance sensor PS1 for entrance passage detection detects the length of the sheet S in the carrying direction. The sheet S passes through the path 13 on the right side of the upper switching unit G1, and is nipped and conveyed by the drive roller 14A and the driven roller 14B of the upper conveyance roller pair 14, and further nipped and conveyed by the conveyance roller pair 15. After that, the sheet is nipped by the pair of discharge rollers 16 and discharged onto the upper sheet discharge tray 61 on the upper outside of the machine, and sequentially stacked (first transport path).

In this paper conveying process, the switching means G1
Is swung by the drive of the solenoid SD1, the passage 17 is closed, and the passage 13 is opened so that the sheet S can pass to the upper sheet discharge tray 61. A maximum of about 200 sheets of paper S can be stored in the upper paper ejection tray 61, and the operator can easily take out the paper S from the upper portion of the post-processing apparatus FS.

(Shift processing or non-sorting) When this conveyance mode is set, the switching means G1 closes the passage 13 and keeps the passage 17 open while the solenoid SD1 is off, and the passage of the sheet S Allows 17 passages.

The image-formed sheet S discharged from the image forming apparatus A passes through the receiving section 11, the inlet roller pair 12A and the intermediate roller pair 12B, and is formed in an open state below the switching means G1. It passes through the passage 17, is sandwiched by the pair of transport rollers 18, passes through the passage 21 above the switching means G2 that is the second transport path, which is diagonally below, and is sandwiched by the pair of transport rollers 22, 23. The sheet is sandwiched by a pair (shift roller pair) 24, and is ejected and placed on the up-and-down sheet ejection tray 62 outside the machine by the ejection roller pair 63 including the upper drive roller 63A and the lower drive roller 63B (second conveyance path). . 64 is an upper drive roller 63A and a lower drive roller 63B
It is a rocking means for rocking so as to be able to be sandwiched and separated.
It is possible to store a maximum of about 3000 sheets of paper S in the elevating and discharging tray 62.

[Binding Process] (Paper Conveying) After the image forming process is performed in the image forming apparatus A, the post-processing apparatus F
The image-formed sheet S sent to the receiving section 11 of S
Passes through the inlet roller pair 12A, the intermediate roller pair 12B, and the passage 17 below the switching means G1, is sandwiched by the conveying roller pair 18, and is conveyed to the third conveying path.

When a sheet S of a size larger than A4 or B5 is conveyed in the third conveying path, the solenoid SD2 is driven, the sheet S passes through the passage 31A below the switching means G2, and then the downstream side. It is nipped and conveyed by the conveying roller pair 32. The paper S is driven by the drive roller 3 further downstream.
Registration roller pair 3 including 4A and driven roller 34B
The sheet 4 is sandwiched and fed by the sheet 4, is discharged to the space above the inclined sheet placing table 35, contacts the sheet placing table 35 or the upper surface of the sheet S stacked on the sheet placing table 35, and slides up. After the rear end portion of the sheet S in the traveling direction is discharged from the registration roller pair 34, the sheet S starts to descend due to its own weight and slides down on the inclined surface of the sheet mounting table 35. The sheet S is slidably contacted and conveyed by an auxiliary conveying means including a rotating paddle roller 34C, an auxiliary conveying belt (also referred to as a winding belt) 34D, and an auxiliary conveying roller (also referred to as a winding roller) 34E, and is abutted in the vicinity of the binding means 40. The leading end of the sheet S in the traveling direction contacts the sheet abutting surface of the member 41 and stops.

In the third transport path, small size sheets S of A4 size, B5 size, etc. are efficiently and continuously transported to improve the copy productivity, so that they are provided in the passage 31A below the switching means G1. A parallel passage 31B and a switching means G3 are provided.

Solenoid SD2 for switching means G2,
When the solenoid SD3 for the switching means G3 is driven together, the tip ends of the switching means G2, G3 both swing in the counterclockwise direction shown in the figure, closing the passages 21 and 31A and opening the passage 31B.

The leading end portion of the first sheet S sent out from the conveying roller pair 18 passes through the passage 31B and comes into contact with the peripheral surface of the registration roller pair 34 in the rotation stopped state to stop.

Next, the solenoid SD3 is de-energized, the tip of the switching means G3 swings clockwise, closing the passage 31B and opening the passage 31A. The leading end portion of the second sheet S sent out from the transport roller pair 18 passes through the passage 31A, comes into contact with the peripheral surface of the registration roller pair 34 in the rotation stopped state, and stops.

At a predetermined timing, the registration roller pair 34 is driven and rotated, and the two sheets S are nipped and conveyed at the same time, and are ejected onto the sheet mounting table 35. The third and subsequent sheets are discharged one by one.

(Alignment) 36 is a width aligning means composed of a pair of width aligning members provided on both side surfaces of the sheet placing table 35. At least one of the width aligning members of the width aligning means 36 is movable in a direction orthogonal to the paper transport direction, and when the paper S is received on the paper loading table 35, it is opened wider than the paper width, and the paper is loaded. When descending on the table 35 and coming into contact with the abutting member 41 and stopping, the side edges of the paper S in the width direction are tapped to align the width of the paper S (width alignment). At this stop position, when a predetermined number of sheets S are stacked and aligned on the sheet mounting table 35, the binding unit 40 performs the binding process, and the sheets S are bound.

(Binding means) Paper S of various sizes (for example, A4 size, B5 size,
The side edge of (A6 size) abuts against the abutting member 41, and the position in the transport direction is regulated.

The binding means 40 has two sets of binding machines (staplers) arranged at positions symmetrical to the center line in the paper width direction in the direction orthogonal to the paper transport direction. The two sets of binding machines strike the binding needles at two centrally distributed locations in the paper width direction in the vicinity of the side edges of the paper S of various sizes.

The two sets of binding machines move in the sheet width direction at the same time corresponding to sheets S of various sizes, stop at positions near the corners of the sheet, and then are driven to rotate by about 45 ° to strike the binding needle.

(Paper discharge) A cutout is formed in a part of the paper stacking surface of the paper tray 35 so that the discharge belt 38 wound around the drive pulley 37A and the driven pulley 37B can rotate. Driven. An extruding member (discharging claw) 39 is integrally formed with a part of the discharging belt 38, and the tip end portion thereof draws an elliptical locus as shown by a dashed line in the drawing. The bound sheet bundle Sa is held on the trailing end portion of the sheet bundle Sa by the pushing member 39 of the discharge belt 38, is placed on the discharge belt 38, and slides on the placement surface of the sheet placement table 35. Pushed up diagonally,
The discharge roller pair 63 advances to the holding position. The sheet bundle Sa nipped by the pair of rotating discharge rollers 63 is moved up and down on the sheet discharge tray 6
2 is discharged and loaded (see FIG. 3).

[First Embodiment of Blower Means for Inlet Conveying Section] FIG. 4 is a sectional view showing the upper mechanism of the post-processing apparatus FS of the first embodiment in which the inlet conveying section 10 is provided with a blowing means. Is.

Air suction means 57 is provided inside the paper feed belt 56 disposed above the cover paper feed section 50. With respect to the cover sheet K stored in the cover sheet storage portion 51, one sheet of cover sheet K is separated and conveyed by the rotating sheet feeding belt 56 and the suction pressure by the air suction means 57.

The air blowing means includes the air suction means 57 and the conduit 7.
1, the air blowing means 72 and the like, and sends the exhaust air of the air suction means 57 to the inlet conveyance section 10.

An air blowing means 72 is arranged in the sheet conveying path 12C of the inlet roller pair 12A and the intermediate roller pair 12B of the inlet conveying section 10. The air exhausted by the air suction unit 57 is discharged by the air blowing unit 72 via the conduit 71 and is blown onto the paper S passing through the paper transport path 12C.

The image-formed paper S heated by the fixing means 8 of the image forming apparatus A is introduced into the receiving section 11 of the post-processing apparatus FS, and is nipped by the entrance roller pair 12A, and the paper conveying path 12C. Be transported to. Paper transport path 12C
The paper S conveyed in the inside is fed from the air suction means 57 to the conduit 7.
It is cooled by the exhausted air discharged from the air blowing unit 72 via 1, is sandwiched by the intermediate roller pair 12B, and is conveyed to the passage 13 or the passage 17.

The image-forming-processed sheet S heated by the fixing unit 8 is wavy due to uneven distribution of the molten toner image, but is discharged from the blower unit 72 when being conveyed in the sheet conveying path 12C. The air is cooled uniformly by the exhaust air, resulting in a flat paper surface.

In particular, the paper S on which the toner images are formed on both sides by the double-sided print processing means of the image forming apparatus A is significantly wavy, but the blowing means 72 in the paper carrying path 12C.
It is cooled by the exhausted air and becomes a flat paper surface.

The blowing means 72 may be arranged in the paper path of the receiving section 11 or in the vicinity of the entrance roller pair 12A.

[Second Embodiment of Blower Means for Inlet Conveying Section] FIG. 5 is a cross-sectional view showing the upper mechanism of the post-processing apparatus FS of the second embodiment in which the inlet conveying section 10 is provided with a blowing means. Is. The symbols used in the drawings are shown in FIG.
The parts having the same function as are given the same reference numerals. Further, the points different from the first embodiment will be described.

In the vicinity of the pair of intermediate rollers 12B, on the upstream side in the sheet conveying direction, the sheet bending removing means (curl correcting means) is provided.
73 are arranged. The sheet bending removing unit 73 includes a driving roller 74, a driven roller 75, a pressing roller 76, and a conveyor belt 77.

The conveyor belt 77 winds around the driving roller 74 and the driven roller 75, and is rotated by being pressed by the pressing roller 76.

The sheet S pinched by the pair of entrance rollers 12A and conveyed to the sheet conveying path 12C is the sheet bending removing means 7.
When the curl formed on the sheet S by the image forming apparatus A is applied in a direction opposite to that of the curl formed on the sheet S when the conveying belt 77 and the pressing roller 76 of FIG.
The curl is corrected.

An air blowing unit 72 is arranged near the sheet bending removing unit 73. The air exhausted by the air suction means 57 is exhausted by the air blowing means 72 through the conduit 71, and is blown to the transport belt 77 of the paper flexure removing means 73.

Paper S transported in the paper transport path 12C
When the sheet passes through the sheet flexure removing means 73, the sheet is sandwiched and conveyed by the conveying belt 77 cooled by the exhaust air discharged from the air sucking means 57, the conduit 71, and the air blowing means 72 to the intermediate roller pair 12B. It is sandwiched and conveyed to the passage 13 or the passage 17.

In the embodiment of the present invention, the post-processing apparatus connected to the copying machine is shown, but the present invention is also applicable to the post-processing apparatus connected to an image forming apparatus such as a printer or a light printing machine. Applicable.

[0068]

As described above, the post-processing apparatus of the present invention provides the following excellent effects.

(1) Image formation is carried out by sending the exhausted air discharged from the air suction means arranged above the cover sheet feeding section to the inlet conveying section by the blowing means composed of a conduit, a blowing section and the like. The recording paper on which the toner image discharged from the device is fixed is cooled and stabilized quickly, so that the toner image of the recording paper stacked on the stacking unit or the discharge tray is transferred to another recording paper, It is possible to prevent the upper and lower recording sheets from sticking together due to the toner image. In particular, it is possible to prevent the recording paper from being contaminated due to sticking of the toner images to each other, rubbing of the toner images, or the like, which occurs in the case of a plurality of recording papers having toner images formed on both surfaces of the paper.

(2) In the case of the post-processing apparatus provided with the paper flexure removing means for removing the curl of the recording paper discharged from the image forming apparatus, the paper flexure removing effect is improved by the air blowing means for cooling the paper flexure removing means. However, since the recording sheet on which the toner image discharged from the image forming apparatus is fixed is cooled and flattened and conveyed, a large amount of recording sheet can be stably stacked on the stacking unit or the discharge tray. . In addition, defective stacking of the recording sheet bundle due to curling of the recording sheet is prevented, stable binding processing is performed, and the finished appearance quality of the recording sheet bundle is improved.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an image forming system including an image forming apparatus, an image reading apparatus, and a sheet post-processing apparatus.

FIG. 2 is a schematic diagram showing a sheet conveyance path of a post-processing device.

FIG. 3 is a sectional view showing an upper mechanism of the post-processing device.

FIG. 4 is a cross-sectional view showing an upper mechanism of the post-processing apparatus according to the first embodiment in which an inlet conveying unit is provided with a blowing unit.

FIG. 5 is a cross-sectional view showing an upper mechanism of the post-processing apparatus according to the second embodiment in which an inlet conveying unit is provided with a blowing unit.

[Explanation of symbols]

10 Entrance transport section 11 Reception Department 12A Inlet roller pair 12B Intermediate roller pair 12C paper transport path 50 cover paper feeder 51 Cover Storage (Paper Storage) 52 Movable bottom plate 53 Push-up lever 54 drive roller 55 Driven roller 56 paper feed belt 57 Air suction means 71 conduit 72 Blower means 73 Paper Deflection Removal Means (Curl Correction Means) 74 Drive roller 75 Driven roller 76 pressure roller 77 Conveyor belt A image forming apparatus FS paper post-processing device (post-processing device) K cover sheet (cover) S recording paper (paper)

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Mikihiko Yamakawa             2970 Ishikawa-cho, Hachioji-shi, Tokyo Konica stock             In the company (72) Inventor Masahiro Kaneko             2970 Ishikawa-cho, Hachioji-shi, Tokyo Konica stock             In the company (72) Inventor Tadahiro Takahashi             3-3 Hibarigaoka, Nishi-Tokyo, Tokyo (72) Inventor Yasumasa Nakamura             1-2-2 Matsubara-cho, Akishima-shi, Tokyo F-term (reference) 3F053 HA03 HB01 HB09 HB12 HB20                       LA02 LB03

Claims (3)

[Claims] 1. An inlet transport unit for receiving and transporting recording paper discharged from an image forming apparatus, and a stacking unit for receiving and stacking the recording paper transported by the inlet transport unit.
In a sheet post-processing apparatus having a sheet feeding unit that feeds sheets one by one from a sheet storage unit that stores sheets different from the recording sheets, and feeds the sheets in the sheet storage unit one by one. A sheet post-processing apparatus comprising: an air suction unit for supplying the air and an air blowing unit that sends the exhaust air of the air suction unit to the inlet conveyance unit. 2. An inlet transport unit for receiving and transporting recording paper discharged from the image forming apparatus, and a stacking unit for receiving and stacking the recording paper transported by the inlet transport unit.
In a paper post-processing apparatus having a paper feeding device that feeds paper one by one from a paper storage unit that stores paper different from the recording paper and conveys the paper to the stacking unit, A sheet bending removing means for removing the bending, an air suctioning means for sending out the sheets in the sheet storing section one by one, and an air blowing means for sending the exhaust air of the air sucking means to the sheet bending removing means. A sheet post-processing device characterized by the above. 3. The sheet feeding device according to claim 1, a sheet post-processing device having a blowing unit, or the sheet deflection removing unit according to claim 2, a sheet feeding device, a sheet post-processing device having a blowing unit. An image forming apparatus comprising: