JPH1138712A - Image forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a user to take a proper post-treatment by conducting the proper staple position switching control while implementing the image rotating process, releasing the staple mode when the proper position is not obtained, and issuing a warning. SOLUTION: In the control means of an image forming device provided with an automatic document feeding device and a post-treatment device, a first control means 8 judges whether a read image is to be rotated or not as required based on the detection results such as the document size and document set direction of a document detecting means and the transfer paper size and transfer paper set direction of a transfer paper detecting means. When the staple mode for stapling the transfer paper is selected, a second control means 9 automatically judges the staple position or the number of staples in response to the requirement of the image rotation by the first control means 8, specifies the staple needle position, or releases the staple process.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus such as an electrophotographic copying machine or a printer having a post-processing apparatus.
In particular, the present invention relates to an image forming apparatus including an image processing unit that performs image processing by rotating an image read by an image reading unit.

[0002]

2. Description of the Related Art In an image forming apparatus, there are originals and transfer papers of various sizes, and there are two types of originals and transfer papers in horizontal and vertical orientations. This is supported by the transfer paper feed tray. However, when it was added to the direction of the original and the transfer paper, it was not possible to meet all the requirements. For this reason, digital image forming apparatuses have been adapted to rotate an image so that an image output can be obtained at least regardless of the direction.

There is also a post-processing device (finisher) that can be stapled by a sorting device. However, in the past, there is often only one stapling portion, and the stapling portion is output even after the image is rotated. Was an unsatisfactory output result.

[0004] In recent years, a stapler that can be stapled at a plurality of locations has appeared. However, there is the following problem with respect to the staple position after the image is rotated, and a method is employed in which the user sets the staple position (for example, one staple position / one deep position / two staple positions). However, it was very difficult to determine the staple position by judging the rotation direction.

After the image is rotated, it is difficult to determine the stapling position unless the character direction of the document is known. For example, horizontal writing originals (portrait originals) on portrait paper,
There is a high possibility that the filing direction of the image-formed transfer paper of the user differs depending on the horizontally written original (landscape original) on the landscape paper, and therefore the staple position also differs.
Also, the staple position of the transfer paper discharge device can be moved and switched in the horizontal direction with respect to the transfer paper discharge direction, but the staple direction is stapled at the discharge end of the transfer paper. There is a restriction that it is difficult.

[0006]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention executes appropriate staple position switching control even during image rotation processing, and releases or issues a staple mode when a proper position cannot be obtained. It is an object of the present invention to provide an image forming apparatus that enables a user to perform appropriate sorting.

[0007]

SUMMARY OF THE INVENTION The above object is achieved by a document detecting means for detecting a document size and a document setting direction, a transfer paper detecting means for detecting a transfer paper size and a transfer paper setting direction, and In an image forming apparatus having a function of rotating and outputting, first control means for determining whether or not to rotate a read image as necessary based on detection results by the document detecting means and the transfer paper detecting means; A post-processing apparatus having a staple unit capable of stapling a sheet of paper; and a second control unit for automatically determining a staple position or the number of staples according to whether or not an image is rotated when a staple mode is selected. Is achieved by the image forming apparatus described above.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an image forming apparatus according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a diagram showing the overall configuration of a digital image forming apparatus provided with a post-processing device and an automatic document feeder. FIG. 2 is a system diagram of the image forming process.

The image forming apparatus main body 1 includes an image reading section A, an image processing section B, an image storage section C, an image writing section D,
It comprises an image forming section E, a sheet feeding section F, an operation panel section G and the like. An automatic document feeder (ADF) DF is provided at an upper portion of the main body of the image forming apparatus. further,
A post-processing device FS having stapler means is connected to a side surface (left side in the figure) of the image forming apparatus main body.

In the image reading section A, a document d placed on a document table glass (platen glass) 11 is illuminated by a halogen lamp 12 provided on a carriage moving on a slide rail. The reflected light from the document d is transmitted to the first lens 13, the second lens 14, the third lens 15
The linear optical image is sequentially photoelectrically converted into an electric signal by the CCD image sensor 17 through the imaging lens 16.

The analog signal photoelectrically converted by the CCD image sensor 17 is subjected to A / D conversion after analog processing in an image processing unit, and is subjected to shading correction, brightness / density conversion, EE processing, character / halftone discrimination, Filter / magnification processing, copy gamma correction, writing density correction, 2
After being subjected to beam control, error diffusion processing, data compression processing, etc., it is output to the image writing section D via the image storage section C.

In the image writing section D, the image data after the image processing is output by the semiconductor laser. The output from the semiconductor laser is rotationally scanned by a polygon mirror 22 rotated by a drive motor 21, passes through an fθ lens 23, passes through a first mirror 24, a second mirror 25, a cylindrical lens 26, and a third mirror 27. Thus, the light is irradiated onto the photosensitive drum 31.

The image forming section E includes a charger 32, a developing device 33, a transfer device 34,
It comprises a separator 35, a cleaning device 36 and the like. Further, on the downstream side of the separator 35, the transport unit 37, the fixing unit 3
8. Discharge means 39 is arranged.

The paper supply unit F includes an upper paper supply cassette 41A,
It comprises a middle paper feed cassette 42A and a lower automatic duplex copy unit (ADU) 43A. Paper cassette 41
A, the paper cassette 42A can accommodate transfer paper (paper) p of different sizes. The ADU 43A reversely transports the transfer paper p without stacking it. 41B is a paper cassette 41
This is a paper feeding unit for separating and feeding the transfer paper p in A. 4
Reference numeral 2B denotes a paper feeding unit for separating and feeding the transfer paper p in the paper feeding cassette 42A. An ADU 43B branches the transfer paper p discharged from the fixing means 38 from the paper discharge means 39.
A transport means for feeding into A.

The automatic document feeder DF automatically feeds a single-sided recording document d set on a document setting table to a predetermined position on the platen glass 11, and transfers the read document d to the platen glass. 11 Remove from the top,
Discharge on the discharged blood.

An automatic document feeder (R-ADF) DF capable of processing a double-sided document d reads a first side of the document d, turns the document d upside down, and reads a second side. To process.

The post-processing apparatus FS conveys the transfer paper p discharged from the paper discharge means 39 of the image forming apparatus main body, performs staple processing, shift processing, and the like, and then discharges the transfer paper p onto a paper discharge tray.

The post-processing device FS includes a receiving section 2 for the transfer paper p.
Is adjusted in position and height so as to coincide with the paper discharge means 39 of the main body 1 of the image forming apparatus (copier, printer, etc.),
It is connected to a control system so as to be driven in accordance with the operation of the image forming apparatus main body 1.

The transfer paper p having an image formed on one or both sides of the transfer paper p in the image forming section E in the image forming apparatus main body 1 is
The image is fixed by the fixing unit 38, discharged from the sheet discharging unit 39 to the outside of the apparatus main body 1, and then carried into the receiving unit 2 of the post-processing apparatus FS.

The transport path of the transfer paper p connected to the sheet transport downstream of the entrance roller pair 3 of the receiving section 2 includes an upper first transport path 100, a middle second transport path 200, and a lower third transport path.
The transfer paper p is branched into three systems of the transport path 300, and the transfer paper p is fed to any of the transport paths by selecting the swing angle occupied by the switching gates g1 and g2. (1) First Transport Path 100 (Non-Stapling, Non-Sort Mode) The transfer paper p on which an image has been formed is discharged onto the fixed paper discharge tray 4 above the post-processing device FS.

(2) Second transport path 200 (non-staple, sort or non-sort mode) The transfer paper p on which an image has been formed is subjected to shift processing by the shift means 201 or direct discharge (non-sort) without processing.
The paper is discharged to the movable paper discharge tray 5 on the side of the post-processing device FS.

(3) Third transport path 300 (staple mode) The transfer paper p is stacked on the intermediate stacker 6, stapled by the staple means 7, and then discharged onto the movable discharge tray 5.

FIG. 3 is a cross-sectional view showing a transfer paper transport path passing through the third transport path 300.

The third conveyance path 300 discharges the transfer paper p1 to the movable discharge tray 5 in the staple mode.

The transfer paper p, which has been subjected to the image forming process in the image forming apparatus main body 1 and sent to the receiving section 2 of the post-processing apparatus FS, has a double-sided image formed thereon, is nipped and conveyed by the entrance roller pair 3, and It passes through the passage 51 below the upper first switching gate g1, is pinched by the pair of conveying rollers 52, and passes through the passage 53 below the third switching gate g3, which is the third conveying path 300 and is obliquely below. Then, the sheet is nipped and transported by the transport roller pair 54. The transfer paper p nipped and transported by the pair of transport rollers 56 downstream of the passage 55 is discharged into the space above the inclined intermediate stacker 6 and is transferred to the intermediate stacker 6 or the transfer paper p stacked on the intermediate stacker 6. After contacting with the upper surface of the roller and further sliding up, the transport roller pair 56
After the trailing edge of the transfer paper is discharged from the printer, the transfer paper p starts to descend due to its own weight, slides down on the inclined surface of the intermediate stacker 6, and stops at the stopper member (transfer paper abutting surface) near the staple means (stapler) 7. ) 57, the rear end of the transfer paper p abuts and stops.

When the transfer paper p slides down before stopping, the alignment member 5
8, the width alignment in the width direction orthogonal to the transfer paper transport direction is performed. The aligning member 58 is movable in a direction orthogonal to the transfer paper transport direction, and is open wider than the transfer paper when receiving the transfer paper p, which is discharged onto the intermediate stacker 6, and slides down on the intermediate stacker 6. When stopping by contacting the stopper member 57, the lateral edge of the transfer sheet p in the width direction is lightly hit to align the width (alignment) of the transfer sheet bundle. At this transfer paper stop position, a predetermined number of transfer papers p are successively aligned and stacked on the intermediate stacker 6, and stopped by contacting the stopper member 57.

When the transfer papers p are successively stacked, first, the transfer paper p _N of the last page is placed on the intermediate stacker 6 with the first surface facing upward, and the transfer paper p _N is placed in front of the transfer paper p _N of the last page. The subsequent transfer paper p _N-1 is aligned and stacked thereon, and similarly, the subsequent transfer paper p _N-2 is aligned and stacked on the transfer paper p _N-1 in the same manner. Finally the first page of the transfer sheet p ₁ is aligned, are stacked, the rear end portion of the transfer paper stack of one set stopper member 57
And then stopped by the stapler 7 (7A, 7B) from the top side of the page-aligned transfer paper bundle.
P (SP _A , SP _B ) is driven in, binding processing (staple processing) is performed, and the transfer paper bundle is bound.

A cutout is formed in a part of the transfer paper loading surface of the intermediate stacker 6, and a plurality of discharge belts 63 wound around a driving pulley 61 and a driven pulley 62 are rotatably driven. You. A discharge claw 63a is formed integrally with a part of the discharge belt 63, and the tip of the discharge claw 63a draws an elliptical trajectory as shown by a one-dot chain line.

FIG. 4 shows the intermediate stacker 6, the alignment member 58,
FIG. 5 is a plan view of a sheet stacking unit including staplers 7A and 7B.

In the figure, two aligning members 58 are arranged symmetrically with respect to the center line CL, and can be simultaneously moved in a direction orthogonal to the transfer direction of the transfer paper p. The left and right alignment members 58 are each fixed to the timing belt TB, and slide and move on the guide bar 59. Timing belt T
B rotates from the stepping motor M via an intermediate gear train. The illustrated alignment member 58 is in a state of being at the home position. The home position is determined by a protrusion (detected portion) 58a provided on the alignment member 58 and a home position detection sensor PS1 provided on the intermediate stacker 6.
Are detected and controlled. The alternate long and short dash lines shown in FIG. 4 indicate transfer papers p of various sizes.

The stapler 7A, 7B is connected to the center line CL.
Are arranged symmetrically with respect to the transfer paper, and can be moved in the width direction of the transfer paper according to the size of the transfer paper.
It is swingably supported so that the driving angles of P _A and SP _B can be selected.

FIG. 5 is a cross-sectional view showing a state in which the transfer sheet p is discharged to a discharge section after the stapling process.

In the figure, the discharge roller pair 64 is composed of an upper roller 64A and a lower roller 64B which are connected to a driving source and driven to rotate. The lower roller 64B is driven and rotated at a fixed position. The upper roller 64A that can be driven and rotated is swingably supported by the swinging means 65. When discharging the staple-processed transfer paper bundle, the upper roller 64A is moved upward to pinch the transfer paper bundle.

The stapled transfer paper bundle is held on the discharge belt 63 with the trailing end of the transfer paper p held by the discharge claws 63a of the discharge belt 63, and slides on the mounting surface of the intermediate stacker 6. And is pushed up obliquely upward to advance to the nip position of the discharge roller pair 64. The transfer paper bundle nipped between the rotating discharge roller pair 64 is discharged and stacked on the movable discharge tray 5 with the image surface facing upward.

FIG. 6A is a plan view showing the position of a staple SP that has been hit at one position on the rear end e of transfer paper p of various sizes. FIG. 6B shows a stapler 7A for driving a staple SP into a rear end e of transfer paper p of various sizes.
It is a top view which shows the movement process of 7B.

The stapler 7A, 7B is linearly moved in the direction parallel to the rear end e of the transfer paper p in a state where the stapler 7A is inclined at 45 °, and is moved at the staple position at a predetermined distance A ₁ , A ₂ , A ₃ . Hit the staples SP _A and SP _B.

FIG. 7A is a plan view showing a state in which staples SP _A and SP _B are hit at two positions at equal intervals with respect to the center line CL of the transfer paper p of various sizes. FIG.
(B) is a plan view showing the arrangement of the staplers 7A and 7B to be hit at two places.

The stapler 7A, 7B has been tilted disposed in said home position from the center line CL of the transfer sheet p equidistant distance A ₀ (shown in dashed position),
When two-pointing is designated, the transfer sheet p is rotated by the driving means and arranged in a posture parallel to the center line CL of the transfer sheet p. The transfer paper p is formed by the stapler 7A, 7B arranged in parallel.
Staples SP _A in two places, the SP _B is struck in parallel.

FIG. 8 is a plan view showing a staple position where a staple SP is driven into one place of various types of transfer paper p.

FIG. 8 (a) shows a state in which the staple SP _A has been driven into the upper left corner of various vertically-oriented transfer papers (portrait transfer papers) p1 written horizontally. Staple SP _A is 4, is Dahari by stapler 7A of the rear side shown in FIG.

[0042] FIG. 8 (b) shows a state where implanted horizontally by the various oblong transfer paper (landscape transfer sheet) p2 staples SP _B in the upper left corner of. Staple SP _B is 4, the stapler 7B of the front side shown in FIG. 6
Is driven by

FIG. 8C shows a state in which the staple SP _A is driven into the upper right corner of the landscape transfer paper p2 in the drawing. Staple SP _A is Dahari by stapler 7A of the rear side.

FIG. 9 is a plan view showing staple positions at which staples SP _A and SP _B are driven into two places of various types of transfer paper p.

FIG. 9A shows a state in which staples SP _A and SP _B have been driven into the left side edge of the landscape transfer paper p2 in the drawing. The staples SP _A and SP _B are stapled by staplers 7A and 7B.

FIG. 9B shows a state in which staples SP _A and SP _B have been driven into the left side edge of the various portrait transfer paper p1 in the drawing. The staples SP _A and SP _B are stapled by staplers 7A and 7B.

FIG. 10 is a perspective view showing a double-sided recording transfer sheet that has been stapled.

FIG. 10A shows a portrait transfer paper p1.
Shows a state in which the implanted staples SP _A in the upper-left corner of the. FIG. 10B shows a landscape transfer paper p2.
Shows a state in which the implanted staples SP _B in the upper left corner of. FIG. 10 (c) shows a state in which staples SP _A and SP _B are driven into the left side of the portrait transfer paper p1 and laterally bound, and FIG. 10 (d) shows a state where the staples are stapled at the left side of the landscape transfer paper P2. This shows a state in which the needles SP _A and SP _B have been driven in and laterally bound.

FIG. 11 shows a large size (for example, A3 size,
FIG. 4 is a plan view showing an original (B4 size, etc.). FIG. 11 (a)
The vertical original (portrait original) d1 written horizontally is shown. FIG. 11B shows a landscape document (landscape document) d2 written horizontally. The arrow shown in the figure indicates the document transport direction.

FIGS. 11C and 11D show the intermediate stacker 6.
Large size (for example, A3
FIG. 3 is a plan view showing a transfer sheet (size, B4 size, etc.). FIG.
(C) shows the portrait transfer paper p1. FIG.
(D) shows the landscape transfer paper p2. The arrow shown in the drawing indicates the transfer paper transport direction.

FIGS. 12A and 12B show the original table glass 1.
1 is a plan view showing a small-size (for example, A4 size, B5 size, etc.) document placed vertically on an image surface 1; FIG. 12A shows a small-sized portrait document (portrait document) d3 written horizontally. FIG. 12B shows a small-size landscape document (landscape document) d4 written horizontally. The arrow shown in the figure indicates the document transport direction.

FIGS. 12C and 12D show the intermediate stacker 6.
Small size (for example, A4
FIG. 3 is a plan view showing a transfer sheet (size, B5 size, etc.). FIG.
(C) shows a portrait transfer paper p3 of a small size.
FIG. 12D shows a horizontally-written small-size landscape document (landscape transfer paper) p4. The arrow shown in the drawing indicates the transfer paper transport direction.

The original size of the originals d1, d2, d3, and d4 and the original setting direction on the original platen glass 11 are detected by original detecting means. That is, the platen glass 11
When a document is manually placed on the platen, a document size and a document setting direction are detected by document detection means using an optical sensor provided inside the document table glass 11. Also,
When a document is automatically conveyed by the automatic document feeder DF, the document size and the document setting direction are determined by the document width detection by the document width matching unit and the document length detection by the document leading edge passage time during document feeding by the document passage sensor. Is detected.

The transfer paper size and the set direction are determined by a transfer paper detecting means such as an automatic transfer paper selection function (APS) for automatically selecting the original size, the original setting direction, and the copy magnification.
Alternatively, it is detected by manual setting on the operation panel section G.

FIG. 13 is a plan view showing a screen display of the operation panel section G, and FIG. 13A shows a basic screen.
3 (b) shows a finishing screen.

In the idle state where copying has not started, “copy setting” and “finishing” are valid. When copying starts, the next “copy reservation” is made possible (see the basic screen in FIG. 13A).

On the finishing screen shown in FIG. 13B, it is possible to select finishing for "copy setting" and finish for "copy reservation". Pressing the "Finish" button after "Copy Settings" results in finishing for "Copy Settings". A message indicates which mode the finishing is set for.

After selecting “copy setting” and “finish”,
Specify the stapling position. That is, one of “automatic one-point hitting”, “rear one-point hitting”, and “front one-point hitting” is designated. FIG.
Stapler 7A shown in is moved to a position corresponding to the transfer sheet setting position and the transfer sheet size, as shown in FIG. 8 (a), (c) and FIG. 10 (a), the implanted staples SP _A to the transfer paper . When "one-point-at-the-front" is designated, the stapler 7B shown in FIG. 6 is moved to a position corresponding to the transfer paper size and the transfer paper setting position, and FIG.
(B), the staples SP _B transfer paper p1
Or drive into p2.

After selecting “copy setting” and “finish”,
With "automatic two places beating", stapler 7A shown in FIG. 7, 7B is moved to a predetermined position A _0, FIG. 9 (a), the
As shown in FIG. 10B and FIGS. 10C and 10D, staples SP _A and SP _B are driven into the transfer paper p1 or p2.

FIG. 14 is a block diagram showing control means of an image forming apparatus provided with the automatic document feeder DF and the post-processing device FS of the present invention.

This image forming apparatus has an automatic paper feed selection function (APS function). The APS function is a function of detecting the set document size and the document setting direction by the document detection unit, and automatically selecting and feeding a transfer sheet having a size corresponding to the magnification set at that time. The transfer paper size and the transfer paper setting direction are as follows when the paper cassette that contains the transfer paper is installed in the paper feed unit of the image forming apparatus.
It is detected by the transfer paper detecting means.

The first control means 8 determines whether or not to rotate the read image as necessary, based on the detection results by the document detection means and the transfer paper detection means. That is, the first control means 8 stores a detection signal of the document size and the document setting direction by the document detection means, a detection signal of the transfer paper size and the transfer paper setting direction by the transfer paper detection means, and a predetermined transfer paper. A paper feed stage signal in which a paper feed cassette is mounted and a copy magnification signal are input.

In the present invention, with respect to the original setting direction, the horizontally oriented portrait original shown in FIG. 11A is called a portrait original d1, and the horizontally oriented landscape original shown in FIG. 11B is called a landscape original d2. . The staple position is also determined in accordance with the landscape document in landscape orientation and the portrait document in portrait orientation.

The first control means 8 determines whether or not to rotate the image read by the image reading section A.

The second control means 9 automatically determines the staple position or the number of staples according to the presence or absence of image rotation by the first control means 8 when the staple mode for stapling the transfer paper by the staple means is selected. The staple position is designated or the staple process is canceled.

FIG. 15 is a flowchart showing the control process of the automatic one-point stapling mode by the image forming apparatus provided with the post-processing device FS of the present invention. This embodiment shows an example in which copying is performed under the condition of an A4 size document and a copy magnification of 1.00.

FIG. 16A shows A3, B4, A4R, B
FIG. 3 is a plan view showing a state where a document d such as 5R is set horizontally on a document glass 11; FIG. 16B shows A4, B
5 is a plan view showing a state where a small-size original d such as 5 is set on an original platen glass 11. FIG. However, in order to set the original d so that the staples can be correctly recorded on the transfer paper as much as possible, the original set position indicated by the arrow is good. Therefore, when the original is set on the platen glass 11,
Make sure the mark is always on the right.

FIG. 17 is a flowchart showing a control process of the automatic two-point stapling mode by the image forming apparatus provided with the post-processing device FS of the present invention. This embodiment shows an example in which copying is performed under the condition of an A4 size document and a copy magnification of 1.00.

FIG. 18A is a schematic diagram showing the setting direction of the portrait document d1 on the platen glass 11, the image formation on the transfer sheet p1, and the stapling position, and FIG.
FIG. 5 is a schematic diagram illustrating a setting direction of a landscape document d2 on the document table glass 11, an image formation on a transfer sheet p2, and a stapling position.

(1) Single-sided original → single-sided copy (1-1) A case where an automatic staple is selected and an A4 size portrait original d1 is set.

[0071] If the paper feed cassette accommodating the A4 size size transfer paper is loaded in the image forming apparatus, the image formed without rotation processing (rotation processing), staple SP _B is automatically selected before one position Then, the stapling process is performed on the transfer sheet p1 (see FIGS. 12A and 12C and FIG. 18A).

If the paper feed cassette containing the A4 size transfer paper is not loaded in the image forming apparatus, or if there is no A4 size transfer paper in the paper feed cassette, the A4 size
Select the paper cassette containing the R size transfer paper,
Perform image formation by rotating 90 degrees, staple SP
_A automatically selects one location in the back and executes a stapling process on the transfer paper p1 (see FIG. 18A).

(1-2) A case where one automatic stapling location is selected and an A4R landscape original d2 is set.

[0074] If the paper feed cassette accommodating the A4R-size size transfer sheet p2 is loaded in the image forming apparatus, the image formed without rotation processing, staple SP _B is automatically selected before one position, transfer The stapling process is executed on the sheet p2 (see FIGS. 11B and 11D and FIG. 18B).

If the paper feed cassette containing the A4R size transfer paper is not loaded in the image forming apparatus, or if there is no A4R size transfer paper in the paper feed cassette,
A sheet cassette accommodating the A4 size transfer paper p2 is selected, the image is formed by executing the -90 degree rotation process, and the staple SP _A automatically selects one deep position and executes the stapling process on the transfer paper p2. (See FIG. 18B).

(1-3) A case where two automatic staple positions are selected and an A4R size landscape document d2 is set.

If there is A4 size transfer paper p2,
An image is formed by rotating the image by -90 degrees, and stapling is canceled.

(1-4) A case where two automatic staple positions are selected and an A4 size portrait document d1 is set.

If the A4 size transfer paper p2 is present, the image rotation processing is not performed, and the two-place processing of staples SP _A and SP _B is executed.

If there is no A4 size transfer paper p2,
The A4R size transfer paper is automatically selected, the image is rotated by -90 degrees, and the staple SP _A is selected and executed at one deep position.

(2) Single-sided original → double-sided copy Original is set horizontally on original platen glass 11 (R set)
In the case of automatic single-staple processing when the portrait document d1 is set and the one-sided document → two-sided copy mode is selected (for example, when an A5R document is enlarged and an image is formed on A4 size transfer paper, etc.) , In special cases).

(2-1) When the presence of A4R size transfer paper is detected, an image is formed on the transfer paper front surface (first surface) without rotating, and rotated 180 degrees on the back surface (second surface) of the transfer paper. processed by the image forming, staple SP _B is set in the back one place.

(2-2) When the absence of A4R size transfer paper is detected, A4 size transfer paper is automatically selected, the transfer paper is rotated by -90 degrees on both sides, and an image is formed. The following processing is performed.

That is, in the third aspect, the staple is released, the shift processing (sort mode) by the shift means 201 is selected for sorting, and the image forming output is continued.

According to the fifth aspect, the image forming output is not performed, and the user is warned and displayed that there is no proper staple position. Or, A to secure the proper staple position
A display requesting that a 4R size transfer sheet be set is displayed.

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

[0087]

According to the image forming apparatus of the present invention, the proper staple position switching control is executed even during the execution of the image rotation processing. , The user can achieve proper post-processing.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a digital image forming apparatus including a post-processing device and an automatic document feeder.

FIG. 2 is a system diagram of an image forming process.

FIG. 3 is a cross-sectional view illustrating a transfer sheet conveyance path passing through a third conveyance path.

FIG. 4 is a plan view of a sheet stacking unit including an intermediate stacker, an alignment member, and a stapler.

FIG. 5 is a cross-sectional view illustrating a state in which transfer paper is discharged to a paper discharge unit after a stapling process.

FIG. 6 is a plan view showing the position of a staple stapled at one place on transfer paper of various sizes, and a plan view showing a moving process of the stapler.

FIG. 7 is a plan view showing the positions of staples that have been hit at two places on transfer paper of various sizes, and a plan view showing the arrangement of staplers.

FIG. 8 is a plan view showing a staple position where a staple is driven into one place of transfer paper of various sizes.

FIG. 9 is a plan view showing staple positions where staples are driven into two places of transfer paper of various sizes.

FIG. 10 is a perspective view showing double-sided recording transfer paper that has been stapled.

FIG. 11 is a plan view showing a large-size document placed on a platen glass and a large-size transfer sheet loaded on an intermediate stacker.

FIG. 12 is a plan view showing a small-size document placed on a platen glass and a small-size transfer sheet loaded on an intermediate stacker.

FIG. 13 is a plan view showing a screen display of an operation panel unit.

FIG. 14 is a block diagram showing control means of the image forming apparatus of the present invention.

FIG. 15 is a flowchart showing a control process of an automatic one-point stapling mode by an image forming apparatus provided with the post-processing device of the present invention.

FIG. 16 is a plan view showing a state where a document is set on a document table glass.

FIG. 17 is a flowchart illustrating a control process of an automatic two-point stapling mode by the image forming apparatus including the post-processing device according to the present invention.

FIG. 18 is a schematic diagram illustrating a setting direction of a portrait document and a landscape document on a platen glass, and image formation on a transfer sheet and a stapling position.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Image forming apparatus main body 5 Movable paper discharge tray 6 Intermediate stacker 7A, 7B Staple means (stapler) 8 First control means 9 Second control means 200 Second transport path 201 Sort mode (shift means) 300 Third transport path A Image Reading unit B Image processing unit C Image storage unit D Image writing unit E Image forming unit F Paper feed unit G Operation panel unit DF Automatic document feeder FS Post-processing device d1 Portrait document d2 Landscape document p1 Portrait transfer paper p2 Landscape transfer Paper SP _A , SP _B Staple

Claims (5)

[Claims] 1. A document detecting means for detecting a document size and a document setting direction, a transfer paper detecting means for detecting a transfer paper size and a transfer paper setting direction, and detection by the document detecting means and the transfer paper detecting means. In an image forming apparatus having a function of rotating and outputting a read image as necessary based on a result, whether or not the read image is rotated as necessary is determined based on a detection result by the document detecting unit and the transfer sheet detecting unit. And a post-processing apparatus having stapling means capable of stapling the transfer paper, and automatically determining the stapling position or the number of stapling according to the presence or absence of image rotation when the stapling mode is selected. An image forming apparatus, comprising: two control means. 2. The image forming apparatus according to claim 1, further comprising a setting unit configured to set two modes, a staple location automatic selection mode and a staple location fixation mode, wherein the second control unit is controlled only in the staple location automatic selection mode. The image forming apparatus according to claim 1, wherein the image forming apparatus is implemented. 3. When the second control means determines that there is no proper stapling position, the execution of the stapling is automatically canceled and the image forming output is executed. Item 3. The image forming apparatus according to Item 2. 4. From the result of the determination by the second control means,
The image forming apparatus according to claim 2, wherein when it is determined that there is no proper staple portion in a plurality of staple settings, the staple portion is replaced with one and the image forming output is executed. 5. The image forming apparatus according to claim 1, wherein when the second control means determines that there is no proper staple position, the image forming output is stopped and a warning is displayed. apparatus.