JP2004161466A - Image forming system and post processing apparatus - Google Patents

Image forming system and post processing apparatus Download PDF

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Publication number
JP2004161466A
JP2004161466A JP2002331182A JP2002331182A JP2004161466A JP 2004161466 A JP2004161466 A JP 2004161466A JP 2002331182 A JP2002331182 A JP 2002331182A JP 2002331182 A JP2002331182 A JP 2002331182A JP 2004161466 A JP2004161466 A JP 2004161466A
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JP
Japan
Prior art keywords
processing
post
sheet
image forming
reverse
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2002331182A
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Japanese (ja)
Inventor
Tomotaka Nagaoka
Teruhiko Toyoizumi
輝彦 豊泉
友貴 長岡
Original Assignee
Konica Minolta Holdings Inc
コニカミノルタホールディングス株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Konica Minolta Holdings Inc, コニカミノルタホールディングス株式会社 filed Critical Konica Minolta Holdings Inc
Priority to JP2002331182A priority Critical patent/JP2004161466A/en
Publication of JP2004161466A publication Critical patent/JP2004161466A/en
Pending legal-status Critical Current

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Abstract

A sheet can be conveyed from a post-processing apparatus disposed downstream from an image forming apparatus to a post-processing apparatus disposed upstream thereof.
An image forming system includes an image forming apparatus, a post-processing apparatus for performing punching and Z-folding, and a post-processing apparatus for performing processing such as a paper inserter. The post-processing device FS is provided with reverse transport means including a roller and a drive motor that can be driven forward and reverse, and the image forming apparatus A is provided with control means SC for controlling the reverse transport means. If necessary, the sheet is conveyed from the downstream post-processing device FS to the upstream post-processing device PZ. Thus, when performing post-processing, the sheet is first conveyed to the post-processing device FS disposed on the downstream side, and after performing high-priority post-processing, the post-processing device disposed on the upstream side by the reverse conveying means. The sheet is conveyed to the PZ, so that post-processing with a low priority can be performed.
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an image forming apparatus including a plurality of post-processing apparatuses having at least one processing unit (processing function) of at least one of paper stacking, stapling, folding, punching, cutting, and a paper inserter, and a copier or a printer. The present invention relates to an image forming system and a post-processing apparatus suitable for being applied to a & post-processing system.
[0002]
[Prior art]
In order to perform post-processing such as punching processing for forming binding holes, processing for attaching a cover, and folding processing on paper on which an image is formed by an image forming apparatus such as a copying machine or a printer, for example, recording after image formation. There is a demand for a post-processing apparatus that performs saddle stapling with staples after adding a cover or the like to paper, and then performs post-processing or the like that forms a booklet by folding in the middle. 2. Description of the Related Art Conventionally, an image forming system to which a post-processing function such as a punching process for punching a binding hole on a recording sheet after an image is formed, a cover attaching process, and a folding process is added to a copying machine, a printer, or the like. Was.
[0003]
In recent years, a post-processing device independent of an image forming apparatus has been proposed for each post-processing mechanism of the post-processing device in consideration of optimization of processing performance and compact design and arrangement. (For example, refer to Patent Document 1).
[0004]
In addition, a post-processing apparatus has been proposed in which a group of rollers that can be driven forward and backward to open a sheet that has been folded in half is provided inside the post-processing (for example, see Patent Document 2).
[0005]
In such a post-processing device, a plurality of processing functions are installed in one device. However, since not all processing functions are required for the user, processing functions that are not used may be wasted.
[0006]
In order to solve this problem, a post-processing apparatus has been proposed in which a processing mechanism unit is provided as an independent unit so that the apparatus can be easily reduced for a customer who does not want a specific processing (for example, Japanese Patent Application No. 2001-2001). -281316.).
[0007]
In this case, a plurality of independent post-processing apparatuses are arranged side by side after the image forming apparatus. An image-formed sheet discharged from the image forming apparatus is first conveyed to a post-processing device arranged on the upstream side, and after performing predetermined post-processing by this upstream-side post-processing device, is arranged on the downstream side. Then, the sheet is transported to the post-processing device, and the downstream post-processing device performs predetermined post-processing.
[0008]
Therefore, in such an image forming system including a plurality of post-processing apparatuses and image forming apparatuses, a post-processing apparatus having a high-priority post-processing function is disposed upstream, and a post-processing apparatus having a low-priority post-processing function is disposed. The processing device is arranged downstream.
[0009]
[Patent Document 1]
JP-A-2002-179331 (pages 3 and 4, FIG. 1)
[Patent Document 2]
JP-A-9-12211 (page 15, FIG. 109, 110, 111)
[0010]
[Problems to be solved by the invention]
However, in the image forming system according to the conventional method described above, only a limited combination of processes can be performed, and if the priorities of post-processing are reversed depending on the arrangement positions of a plurality of post-processing devices, the post-processing devices are arranged in the post-processing devices. Function may not be useful.
[0011]
For example, when a post-processing device having a post-processing function having a higher priority in post-processing due to the arrangement position of a plurality of post-processing devices must be disposed on the downstream side farthest from the image forming apparatus, the post-processing is performed. In addition, since the sheet is first conveyed to the downstream post-processing apparatus to perform the post-processing, there is a problem that the post-processing function having a low priority of the post-processing apparatus arranged on the upstream side cannot be used.
[0012]
Further, when performing post-processing with lower priority on the upstream side after performing post-processing on the downstream side, it is necessary to arrange another post-processing device (unit) after post-processing with higher priority. Therefore, the cost increases and the size of the apparatus increases, which is very uneconomical.
[0013]
Therefore, the present invention has been made to solve the above-described problem. If necessary, a sheet is processed from a post-processing apparatus disposed downstream from an image forming apparatus to another post-processing apparatus disposed upstream thereof. It is an object of the present invention to provide an image forming system and a post-processing device that can be reversely transported to an apparatus.
[0014]
[Means for Solving the Problems]
In order to solve the above problems, an image forming system according to the present invention includes an image forming apparatus that forms an image on a sheet based on print data, and an image forming apparatus that is arranged side by side after the image forming apparatus, and is discharged from the image forming apparatus. And a plurality of post-processing devices for post-processing the paper supplied or supplied from the outside, the post-processing device includes a reverse transport that reversely transports the paper from the downstream side to the upstream side of the internal transport path. Means is provided, and the post-processing device or the image forming device controls the reverse conveyance device to reversely convey the sheet from one post-processing device disposed downstream of the image forming device to another post-processing device. A control means is provided.
[0015]
According to the image forming system of the present invention, when a plurality of post-processing devices are arranged side by side, under the control of the control unit, the reverse transport unit transfers the sheet from one of the post-processing devices arranged downstream of the image forming device. The sheet is conveyed backward to another post-processing device.
[0016]
For example, a post-processing device that performs high-priority post-processing is disposed on the downstream side farthest from the image forming apparatus, and a post-processing device that performs low-priority post-processing is a post-processing device that performs high-priority post-processing. When the sheet is disposed between the post-processing device and the post-processing device, the sheet is first conveyed to a post-processing device disposed on the downstream side. Is transferred to a post-processing device arranged on the upstream side, and post-processing with a low priority is performed in the upstream post-processing device.
[0017]
Therefore, even if the priority order of the post-processing is reversed depending on the arrangement positions of the plurality of post-processing devices, the designated post-processing can be performed according to the priority order. The function can be used effectively.
[0018]
In addition, since the sheet processed by the downstream post-processing device is controlled to be conveyed to the upstream post-processing device and processed differently from the downstream processing, the sheet not processed by the downstream post-processing device is controlled. Processing can be performed upstream. Further, the sheet processed by the downstream post-processing device is conveyed to the upstream post-processing device, and the same processing as that performed on the sheet at a position different from the position where the sheet is processed on the downstream side is performed. Therefore, if the upstream and downstream post-processing apparatuses have similar processing functions, these functions can be effectively used.
[0019]
In addition, since the reverse transport means includes a plurality of rollers and a drive motor that can be driven forward and reverse, the reverse transport of the paper can be easily realized.
[0020]
A post-processing apparatus according to the present invention includes an image forming apparatus that forms an image on a sheet based on print data, and a plurality of post-processing apparatuses that can be combined with each other. A post-processing means for post-processing the paper discharged from the apparatus or supplied from the outside, a reverse conveying means for reverse conveying the paper from a downstream side to an upstream side of an internal conveying path of the post-processing means, and the post-processing. Control means for controlling the reverse transport means so as to reversely transport the sheet to another post-processing apparatus disposed upstream of the apparatus.
[0021]
According to the post-processing apparatus according to the present invention, the reverse transport means reversely transports the sheet to another post-processing apparatus arranged upstream of the post-processing apparatus under the control of the control means.
[0022]
Thus, for example, when a plurality of post-processing devices are arranged in combination, even if the priority of the post-processing is reversed depending on the arrangement position of these post-processing devices, the designated post-processing is performed according to the priority. Can be performed.
[0023]
In addition, since the reverse transport means includes a plurality of forward and reverse rotationally drivable rollers and a drive motor, reverse transport can be easily realized.
[0024]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an image forming system according to an embodiment of the present invention and a post-processing apparatus used in the image forming system will be described with reference to the drawings.
[0025]
FIG. 1 shows a configuration example of an image forming system 100 as an embodiment according to the present invention. The image forming system 100 according to the embodiment of the present invention conveys a sheet from a post-processing apparatus disposed downstream from an image forming apparatus to a post-processing apparatus disposed upstream thereof, if necessary. In this way, a post-processing device that performs high-priority post-processing is disposed on the downstream side farthest from the image forming apparatus, and a post-processing device that performs low-priority post-processing is assigned a lower priority than the image forming device. In a case where the apparatus is arranged between a high-order post-processing apparatus and a high-order post-processing apparatus, the specified post-processing can be performed according to the priority order.
[0026]
The image forming system 100 includes an image forming apparatus A for forming an image on a sheet, a post-processing apparatus PZ for performing punching and Z-folding, and a post-processing apparatus FS for performing processing such as attaching an insert sheet.
[0027]
In this case, the post-processing device PZ and the post-processing device FS are arranged side by side after the image forming apparatus A, and the post-processing device FS having a high-priority post-processing device, for example, an insert sheet attaching device, A post-processing device PZ, which is disposed on the downstream side farthest from the forming device A and has low priority, such as a post-processing device PZ having a punching process and a Z-folding process, is provided between the image forming device A and the post-processing device FS. Are located in
[0028]
The image forming apparatus A includes an image reading unit 1, an image processing unit 2, an image writing unit 3, an image forming unit 4, a cassette sheet feeding unit 5, a sheet feeding roller unit 6, a fixing device 7, a sheet discharging unit 8, an automatic duplex copy. A paper feed unit (ADU) 9 and a control unit SC are provided.
[0029]
An automatic document feeder DF is mounted above the image forming apparatus A. The document d placed on the document table of the automatic document feeder DF is transported in the direction of the arrow, and one or both images of the document are read by the optical system of the image reading unit 1 and read by the CCD image sensor 1A. .
[0030]
The analog signal photoelectrically converted by the CCD image sensor 1A is subjected to analog processing, A / D conversion, shading correction, image compression processing, and the like in the image processing unit 2, and then sent to the image writing unit 3.
[0031]
In the image writing section 3, the output light from the semiconductor laser is applied to the photosensitive drum 4A of the image forming section 4 to form a latent image. In the image forming unit 4, processes such as charging, exposure, development, transfer, separation, and cleaning are performed, and an image is transferred to the sheet S conveyed from the cassette sheet feeding unit 5 or the sheet feeding roller unit 6.
[0032]
The paper S carrying the image is fixed by the fixing device 7 and discharged from the paper discharge unit 8.
[0033]
The control unit SC controls the overall operation of the image forming system 100. That is, the control means SC controls the operations of the post-processing device PZ and the post-processing device FS in addition to the image forming device A at the same time.
[0034]
FIG. 2 is a block diagram of a control system of the image forming system 100. As shown in FIG. 2, the control means SC includes a main body control unit 11, a post-processing device PZ control unit 12, and a post-processing device FS control unit 13.
[0035]
The main body control unit 11 controls operations of the image forming apparatus A such as image reading, image processing, image formation, and sheet feeding, conveyance, and sheet discharging. The main body control unit 11 controls the image reading unit 1 in accordance with a processing mode designated by the user, reads an image of a document, processes the read image data in the image processing unit 2, and processes the read image data. The image writing unit 3 irradiates the photosensitive drum 4 </ b> A with image data to form a latent image, and the image forming unit 4 transfers and fixes the image to the sheet S conveyed from the cassette feeding unit 5. Control is performed so that the paper is discharged from the paper discharge unit 8.
[0036]
The post-processing device PZ control unit 12 controls the sheet conveyance, reverse conveyance, punching operation, and Z-folding operation inside the post-processing device PZ.
[0037]
The post-processing device PZ control unit 12 includes a main motor M1 for paper conveyance, a registration motor M2, a punch motor M3 for driving a punch processing unit P, and a punch motor M3 based on detection information from the entrance detection sensor S2 and the paper discharge sensor S3. The operations of the punch swing motor M4, the stopper motor M5 for moving the position of the folding stopper D of the Z-folding processing means Z, and the gate switching solenoid S1 are controlled.
[0038]
The post-processing device FS control unit 13 includes a sheet conveyance, a reverse conveyance, a sheet feeding, a shift processing conveyance unit 20, a stacking unit 30, a paper inserter 40, a binding unit 50, and a folding unit 60 inside the post-processing device FS. And the like. The post-processing device FS control unit 13 includes a main transport motor M6 for transporting the paper, a paper feed motor M7 for feeding the insert paper K, and the like based on the detection information from the entrance detection sensor S4 and the paper presence / absence detection sensor S5. To be controlled.
[0039]
The post-processing device PZ includes a punching unit P, a Z-folding unit Z, a main transport motor M1 as a reverse transport unit, and a plurality of transport rollers, and is disposed on the sheet discharge unit 8 side of the image forming apparatus A. I have. The sheet S discharged from the sheet discharging unit 8 is directly sent to the post-processing device PZ.
[0040]
The punching means P performs a process of punching a binding punch hole in the sheet S or the insert sheet K. The Z-folding means Z performs a process of folding the sheet S or the insert sheet K twice and folding it into a zigzag Z-shape by a plurality of folding rollers.
[0041]
In order to perform these processes, the post-processing device PZ includes a main transport motor M1, a registration motor M2, a punch motor M3, a punch swing motor M4, a stopper motor M5, a gate switching solenoid S1, an entrance detection sensor S2, and a discharge sensor. A paper sensor S3 and the like are provided (see FIG. 2).
[0042]
The main transport motor M1 drives a plurality of transport rollers. These transport rollers and the main transport motor M1 can be driven forward and reverse, and function as reverse transport means of the post-processing means PZ when driven in reverse. The reverse transport means includes a main transport motor M1 and a plurality of rollers R that can be driven forward and reverse. pz (See FIG. 3 described later.) Therefore, the reverse transport function can be realized by adding the reverse rotation control of the transport drive system without changing the configuration of the conventional transport mechanism.
[0043]
The registration motor M2 drives a registration roller. The registration motor M2 and the registration roller can be driven forward and reverse. The punch motor M3 is a motor for positioning a punch (not shown) of the punch means, and the punch swing motor M4 is a motor for performing a punching operation of the punch. The stopper motor M5 is a motor for positioning the folding stopper D (see FIG. 3 described later) of the Z-folding portion.
[0044]
Further, the gate switching solenoid S1 drives a gate G (see FIG. 3) for switching the transport path. The entrance detection sensor S2 detects the presence or absence of a sheet at the entrance of the post-processing apparatus PZ, and inputs the detection result to the post-processing apparatus PZ control unit 12 as an electric signal. The paper discharge sensor S3 detects the presence or absence of paper discharge in the discharge unit of the post-processing device PZ, and inputs the detection result to the post-processing device PZ control unit 12 as an electric signal.
[0045]
The post-processing device FS includes a shift processing transport unit 20, a stacking unit 30, a paper inserter 40, a binding unit 50, and a folding unit 60 as post-processing units. In order to perform these processes, the post-processing device FS is provided with a main transport motor M6, a paper feed motor M7, an entrance detection sensor S4, a paper presence / absence detection sensor S5, and the like (see FIG. 2). Further, the main transport motor M6 and the plurality of transport rollers R fs (See FIG. 3 described later) is also used as a reverse transport unit.
[0046]
The main transport motor M6 drives a plurality of transport rollers. These transport rollers and the main transport motor M6 can be driven forward and reverse, and function as a transport unit of the post-processing device FS when driven reversely.
[0047]
Further, a paper discharge tray 81 is disposed above the post-processing device FS, and an elevating discharge tray 82 and a fixed paper discharge tray 83 are disposed at a discharge portion (left side in FIG. 1) of the post-processing device FS. . The paper discharge tray 81 is for stacking the paper S that is not processed by the post-processing device PZ and is discharged through the transport path of the post-processing device PZ. The paper discharge tray 82 is for stacking sheets that have been subjected to edge binding and shift processing. The paper discharge tray 83 is for stacking sheets that have been subjected to saddle stitching and folding.
[0048]
This post-processing device FS is arranged after the post-processing device PZ. The sheet S after image formation is sent to the post-processing device FS via the post-processing device PZ, and is subjected to predetermined post-processing by the post-processing device FS, and then is discharged to the paper output trays 82 and 83. .
[0049]
Hereinafter, the operation of reversely transporting the insert sheet K from the post-processing device FS to the post-processing device PZ will be described with reference to FIGS.
[0050]
3 to 9 are views showing the state of each stage of reversely transporting the insert sheet k. FIGS. 3 to 9 are schematic diagrams of a part relating to the reverse conveyance processing of the insert sheet in the image forming system 100. FIG.
[0051]
When the insert sheet K is conveyed backward from the post-processing apparatus FS to the post-processing apparatus PZ, first, based on the result of detecting the presence or absence of the insert sheet K in the paper inserter 40 by the sheet presence detection sensor S5 (not shown). Then, it is determined whether or not there is an insert sheet K in the paper inserter 40. If there is an insert sheet K, the main transport motor M6 of the post-processing device FS and the main transport motor M1 of the post-processing device PZ are driven.
[0052]
Next, the paper feed motor M7 of the post-processing device FS is driven to start feeding the insert paper K. FIG. 3 is a diagram illustrating a state in which the insert sheet K is fed.
[0053]
As shown in FIG. 3, an image processing apparatus A, a post-processing apparatus PZ, and a post-processing apparatus FS are arranged in this order from the right. The post-processing device FS has post-processing means such as the shift processing transport unit 20 as described above. A plurality of transport rollers R fs Is disposed, and an entrance detection sensor S4 is disposed on the entrance side of the transport path. A paper inserter 40 is provided above the post-processing device FS, and the insert paper K is loaded on the paper inserter 40.
[0054]
The post-processing device PZ includes the punching means P and the Z-folding means Z as described above. The Z-fold processing means Z includes a plurality of folding rollers and a folding stopper D. Further, the transport rollers R are provided on the transport path of the post-processing device FS. pz And a registration roller R. An entrance detection sensor S2 is provided on the entrance side of the transport path, and a paper discharge sensor S3 is provided on the paper discharge side. A transfer path switching gate G is provided on the transfer path.
[0055]
As shown in FIG. 3, the insert paper K is fs Is conveyed to the inside of the post-processing apparatus FS along the paper feeding conveyance path in the illustrated conveyance direction.
[0056]
Next, normal conveyance of the insert sheet K is performed inside the post-processing device FS. FIG. 4 is a diagram illustrating a state in which the insert sheet K is normally transported. As shown in FIG. fs Is transported inside the post-processing device FS along the internal transport path in the illustrated transport direction. In this case, the entrance detection sensor S4 of the post-processing device FS detects the rear end of the insert sheet K to determine whether the insert sheet K has reached the inside of the post-processing device FS. When the insert sheet K reaches the inside of the post-processing device FS, the normal conveyance is completed by stopping the sheet feeding motor M7.
[0057]
FIG. 5 is a diagram illustrating a state where the reverse conveyance of the insert sheet K is started. As shown in FIG. 5, after the insert sheet K reaches the inside of the post-processing device FS, the main conveyance motor M6 of the post-processing device FS is driven to rotate in the reverse direction, and the reverse conveyance of the insert sheet K is started.
[0058]
When the insert sheet K enters the processing device PZ by reverse transport, the main transport motor M1 of the post-processing device PZ is driven to rotate in the reverse direction, and the transport roller R is driven. pz The reverse transport of the insert paper K to the registration roller R is performed. At the same time, the main transport motor M6 of the post-processing device FS is stopped.
[0059]
FIG. 6 shows a state in which the insert sheet K has hit the registration roller R. As shown in FIG. pz Then, the insert sheet K is conveyed backward to the registration roller R, and the insert sheet K is bent in a state where the insert sheet K hits the stopped registration roller R. From this state, the registration motor M2 is driven to rotate in the reverse direction, and the insert sheet K is further conveyed further upstream.
[0060]
FIG. 7 shows a reverse transport state inside the post-processing device PZ. As shown in FIG. 7, the entrance detection sensor S2 of the post-processing device PZ detects whether the insert sheet K has reached the entrance of the post-processing device PZ. When it is detected that the insert sheet K has reached the entrance of the post-processing device PZ, the reverse transport time is calculated and the timer count is started. Then, the reverse transport of the insert sheet K is performed further upstream for a predetermined time. In this case, the insert sheet K is reversely conveyed to a specified position in the post-processing device PZ.
[0061]
After the reverse conveyance for a predetermined time, that is, after being conveyed to a predetermined position, the main conveyance motor M1 and the registration motor M2 of the post-processing device PZ are stopped. Then, the gate switching solenoid S1 (see FIG. 1) is turned ON, and the gate G is driven to switch the transport path.
[0062]
FIG. 8 illustrates a state in which the punching process and the Z-folding process are performed by the normal conveyance of the insert sheet K. As shown in FIG. 8, after the insert sheet K is reversely conveyed to a specified position in the post-processing device PZ, the main conveyance motor M1 and the registration motor M2 of the post-processing device PZ are driven to rotate forward. Then, a punching process and a Z-folding process are performed on the insert sheet K. The processed insert sheet K is transported from the post-processing device PZ to the post-processing device FS.
[0063]
FIG. 9 shows a state in which the post-processed insert sheet K is transported to another processing unit of the post-processing apparatus FS. As shown in FIG. 9, the insert sheet K is conveyed to another post-processing by normal conveyance inside the post-processing device FS. In this case, for example, when it is determined that the insert sheet K has reached the inside of the post-processing device FS based on the detection result of the sheet discharge sensor S3, the main transport motor M1 of the post-processing device PZ is stopped. Then, the insert sheet K is normally conveyed inside the post-processing apparatus FS, and after performing other post-processing, is discharged.
[0064]
Hereinafter, the operation when the sheet S and the insert sheet K on which an image is formed in the image forming system 100 are simultaneously reversely conveyed will be described with reference to FIG. FIG. 10 is an operation flowchart of reverse conveyance of the sheet S and the insert sheet K. Each mode is prepared in the image forming system 100 and can be selected.
[0065]
Here, in the image forming system 100, after the sheet S on which the image is formed and the insert sheet K supplied from the post-processing device FS are conveyed to the inside of the post-processing device FS, they are conveyed back to the post-processing device PZ, and post-processed. It is assumed that after the punching process and the Z-folding process in the apparatus PZ, the sheet is discharged via the post-processing apparatus FS.
[0066]
With this as an operating condition, the control means SC of the image forming system 100 controls the post-processing device FS and the post-processing device PZ as follows.
[0067]
First, in step N1 of the flowchart shown in FIG. 10, it is determined whether or not the punch and Z-folding processing mode (hereinafter, referred to as “PZ mode”) of the sheet S and the insert sheet K is set. If the PZ mode is not set, the mode shifts to the normal mode. When the PZ mode is set, the sheet S on which an image is formed is conveyed to the stacking unit 30 (see FIG. 1) via the post-processing device PZ.
[0068]
In step N2, the presence / absence of the insert sheet K in the paper inserter 40 is detected by the sheet presence / absence detection sensor S5, and it is determined whether or not the insert sheet K is present based on the result. If there is no insert sheet K, the operation ends. If there is an insert sheet K, then, in step N3, the main transport motor M6 of the post-processing device FS and the main transport motor M1 of the post-processing device PZ are driven.
[0069]
Next, in step N4, the sheet feeding motor M7 of the post-processing device FS is driven to start sheet feeding (see FIG. 3).
[0070]
In Step N5, it is determined whether or not the insert sheet K has reached the inside of the post-processing device FS based on the detection result of the entrance detection sensor S4 of the post-processing device FS. Here, the entrance detection sensor S4 detects the rear end of the insert sheet K. When it is determined from the detection result of the entrance detection sensor S4 that the insert sheet K has reached the inside of the post-processing device FS, the sheet feeding motor M7 is stopped in the next step N6. Then, the timer count is started. In this case, the transport state of the insert sheet K is as shown in FIG.
[0071]
After the insert sheet K is conveyed to the stacking unit 30 by the conveyance for a predetermined time, the main conveyance motor M6 of the post-processing device FS is stopped in step N7. Then, in step N8, the main transport motor M6 of the post-processing device FS is driven to rotate in the reverse direction, and the reverse transport of the sheet S and the insert sheet K is started. In this case, the sheet S and the insert sheet K are reversely conveyed from the stacking unit 30 to the upstream side of the post-processing device FS. In this case, the transport directions of the sheet S and the insert sheet K are as shown in FIG.
[0072]
Next, in step N9, it is determined whether or not the sheet S and the insert sheet K have entered the processing device PZ based on the detection result of the sheet discharge sensor S3 of the post-processing device PZ. When the sheet S and the insert sheet K enter the processing device PZ, the main transport motor M1 of the post-processing device PZ is driven to rotate in the reverse direction, and the transport rollers R pz The sheet S and the insert sheet K are conveyed backward to the registration rollers R. At the same time, the main transport motor M6 of the post-processing device FS is stopped. In this case, the transport state of the sheet S and the insert sheet K is as shown in FIG.
[0073]
After the sheet S and the insert sheet K hit the stopped registration rollers R, the bending of the sheet S and the insert sheet K is corrected in step N10. Then, after performing the registration timer calculation, in step N11, the registration motor M2 is driven to rotate in the reverse direction, and the sheet S and the insert sheet K are further conveyed further upstream.
[0074]
Next, in step N12, it is determined whether the sheet S and the insert sheet K have reached the entrance of the post-processing device PZ. Here, the entrance detection sensor S2 detects whether the sheet S and the insert sheet K have reached the entrance of the post-processing device PZ. When the sheet S and the insert sheet K have reached the entrance of the post-processing device PZ, in step N13, the reverse transport time is calculated and the timer count is started. Then, the sheet S and the insert sheet K are further conveyed further upstream in a predetermined time. In this case, the sheet S and the insert sheet K are reversely conveyed to a specified position inside the post-processing device PZ. In this case, the transport state of the sheet S and the insert sheet K is as shown in FIG.
[0075]
After the reverse conveyance for a predetermined time, that is, after the conveyance to the predetermined position, the main conveyance motor M1 and the registration motor M2 of the post-processing device PZ are stopped in step N14. Then, in step N15, the gate switching solenoid S1 (see FIG. 1) is turned on to drive the gate G to switch the transport path.
[0076]
Next, in step N16, the main transport motor M1 and the registration motor M2 of the post-processing device PZ are driven to rotate forward. Then, in step N17, a punching process and a Z-folding process are performed on the sheet S and the insert sheet K. In this case, the transport state of the sheet S and the insert sheet K is as shown in FIG. The processed sheet S and the insert sheet K are transported from the post-processing device PZ to the post-processing device FS.
[0077]
Next, in step N18, it is determined whether or not there is a paper discharge from the post-processing device PZ based on the detection result of the paper discharge sensor S3. If there is a discharge, in the next step N19, based on the detection result of the entrance detection sensor S4 of the post-processing device FS, it is determined whether or not the sheet S and the insert sheet K have reached the inside of the post-processing device FS. Judge. When it is determined that the sheet S and the insert sheet K have reached the inside of the post-processing device FS, in step N20, the main transport motor M1 of the post-processing device PZ is stopped. Then, the sheet S and the insert sheet K are normally conveyed (see FIG. 9) inside the post-processing apparatus FS, and after performing other post-processing, the sheet is discharged.
[0078]
Next, in step N21, it is determined whether or not the processing of the designated predetermined number has been completed. If the processing for the predetermined number of sheets has not been completed, the process returns to step N2, and the above-described process is repeated. When the processing for the predetermined number of sheets is completed, the operation ends.
[0079]
As described above, in the present embodiment, the post-processing apparatus PZ and the post-processing apparatus FS are provided with the reverse conveyance means including the rollers and the driving motors that can be driven forward and reverse, and the image forming apparatus A includes Control means SC for controlling the reverse transport means is provided. As a result, the paper (paper S, insert paper K) can be transported from the downstream post-processing device FS to the upstream post-processing device PZ as necessary.
[0080]
As a result, the post-processing device FS that performs post-processing with a higher priority is disposed on the downstream side farthest from the image forming device A, and the post-processing device PZ that performs post-processing with a lower priority has a higher priority than the image forming device A. In the case where the sheet (sheet S, insert sheet K) is placed between the post-processing apparatus FS having a higher rank, the sheet (the sheet S and the insert sheet K) is first conveyed to the post-processing apparatus FS arranged on the downstream side. After the high-priority post-processing is performed, it is conveyed to the post-processing device PZ arranged on the upstream side by the reverse conveying means, and the low-priority post-processing can be performed in the upstream-side post-processing device PZ. Therefore, even if the priority order of the post-processing is reversed depending on the arrangement positions of the plurality of post-processing devices, the designated post-processing can be performed according to the priority order. Functions can be used effectively.
[0081]
In the above-described embodiment, the image forming system 100 is described in which the image forming apparatus A includes the plurality of post-processing apparatuses and the control unit SC that controls the sheet reverse conveyance unit is provided in the image forming apparatus A. As a post-processing device for an image forming system in which a plurality of post-processing devices are arranged, a control unit for controlling a reverse conveyance unit of the post-processing device may be provided in the post-processing device.
[0082]
In this case, for example, control means (post-processing device PZ control unit 12 and post-processing device FS control unit 13) for controlling the post-processing device PZ and the post-processing device FS are provided in the post-processing device FS. This control means controls the sheet (sheet S, insert sheet K) to be reversely conveyed from the post-processing device FS to the post-processing device PZ disposed upstream thereof as necessary. The operation is the same as the operation of the above-described post-processing devices FS and PZ.
[0083]
Further, in the above-described embodiment, the sheet processed by the downstream post-processing device is transported to the upstream post-processing device to perform a process different from the downstream processing. Therefore, post-processing that is not provided in the downstream post-processing device can be processed on the upstream side. Further, the sheet processed by the downstream post-processing device is conveyed to the upstream post-processing device, and the same processing as the processing performed on the downstream side is performed at a position different from the position where the sheet is processed on the downstream side. It may be. In this case, if the upstream and downstream post-processing apparatuses have similar processing functions, these functions can be effectively used.
[0084]
Further, the post-processing device is not limited to the post-processing device FS and the post-processing device PZ described above, and may include at least one of paper stacking, stapling, folding, punching, cutting, and paper inserter processing. The present invention is also applicable to a post-processing device having a means (processing function).
[0085]
【The invention's effect】
As described above, according to the image forming system of the present invention, the post-processing device is provided with the reverse conveyance unit that conveys the paper from the downstream side to the upstream side of the internal conveyance path. The image forming apparatus is provided with control means for controlling the reverse transport means, and controls the reverse transport means to transport the sheet from the downstream post-processing apparatus to the upstream post-processing apparatus as necessary. It is.
[0086]
According to this configuration, for example, a post-processing device that performs high-priority post-processing is disposed downstream of the image forming apparatus farthest away from the image forming device, and a post-processing device that performs low-priority post-processing is determined to be the same as the image forming device. If the paper is placed between the post-processing devices having a higher priority, the sheet is conveyed to the post-processing device disposed on the downstream side, and the post-processing device having the downstream side performs post-processing having a higher priority, and then reversely conveys the paper. By the means, it is conveyed to a post-processing device arranged on the upstream side, and post-processing with a low priority can be performed by the upstream post-processing device. Therefore, even if the priority order of the post-processing is reversed depending on the arrangement positions of the plurality of post-processing devices, the designated post-processing can be performed according to the priority order. Functions can be used effectively.
[0087]
According to the post-processing device according to the present invention, the post-processing unit, a reverse transport unit that reversely transports the paper, and a control unit that controls the reverse transport unit, the reverse transport unit by the control of the control unit, the reverse transport unit, The sheet is conveyed backward to another post-processing device disposed upstream of the post-processing device.
[0088]
According to this configuration, when a plurality of post-processing devices are used in combination, even when an arrangement position where the priority of the post-processing of the plurality of post-processing devices is reversed, the designated post-processing is performed according to the priority. Processing can be performed.
[0089]
INDUSTRIAL APPLICABILITY The present invention is very suitable when applied to an image forming system including an image forming apparatus such as a copying machine or a printer and a plurality of post-processing apparatuses arranged side by side.
[Brief description of the drawings]
FIG. 1 is a diagram showing a configuration example of an image forming system as an embodiment according to the present invention.
FIG. 2 is a block diagram illustrating a configuration example of a control system of the image forming system 100.
FIG. 3 is a diagram illustrating an example of a feeding state of insert sheets.
FIG. 4 is a diagram illustrating an example of a normal conveyance state of an insert sheet.
FIG. 5 is a diagram illustrating an example of a state of starting reverse conveyance of an insert sheet.
FIG. 6 is a diagram showing an example of a reverse conveyance state inside the post-processing device PZ.
FIG. 7 is a diagram illustrating an example of an end state of reverse conveyance inside the post-processing apparatus PZ.
FIG. 8 is a diagram illustrating an example of a state of punching and Z-folding processing.
FIG. 9 is a diagram illustrating an example of a transport state of the post-processing apparatus FS to another processing unit.
FIG. 10 is an operation flowchart illustrating an example of paper reverse conveyance of the image forming system 100.
[Explanation of symbols]
20 shift processing transport section
30 loading section
40 Paper Inserter
50 Binding means
60 folding means
100 Image forming system
PZ, FS Post-processing equipment
SC control means
D folding stopper
G gate
P punch processing means
R Registration roller
R fs Conveying roller of post-processing device FS
R pz Transport roller of post-processing device PZ
Z Z folding means

Claims (8)

  1. An image forming apparatus that forms an image on a sheet based on print data, and a plurality of post-processing apparatuses that are arranged side by side after the image forming apparatus and post-process a sheet discharged from the image forming apparatus or supplied from outside. An image forming system comprising a processing device;
    The post-processing device is provided with a reverse transport unit that reversely transports the sheet from a downstream side of the internal transport path to an upstream side,
    In the post-processing device or the image forming device,
    The image forming apparatus according to claim 1, further comprising control means for controlling the reverse conveying means so as to reversely convey the sheet from one post-processing apparatus disposed downstream of the image forming apparatus to another post-processing apparatus. system.
  2. The post-processing device is
    The image forming system according to claim 1, further comprising at least one of sheet processing, stapling, folding, punching, cutting, and a paper inserter.
  3. The image forming system according to claim 1, wherein the reverse transport unit includes a plurality of rollers that can be driven to rotate forward and reverse and a drive motor.
  4. The control means includes:
    3. The sheet processing apparatus according to claim 1, wherein the sheet processed by the downstream post-processing apparatus is conveyed to an upstream post-processing apparatus, and is controlled to perform processing different from the downstream processing. An image forming system according to any one of the above.
  5. The control means includes:
    The sheet processed by the post-processing device on the downstream side is conveyed to the post-processing device on the upstream side, and the same processing as the processing performed on the downstream side is performed at a position different from the position where the sheet is processed on the downstream side. The image forming system according to claim 1, wherein the control is performed.
  6. In a plurality of post-processing devices that can be arranged after the image forming apparatus that forms an image on paper based on print data, and that can be combined,
    A post-processing unit having an internal conveyance path, which post-processes a sheet discharged from the image forming apparatus or supplied from the outside,
    Reverse transport means for reverse transporting the sheet from the downstream side to the upstream side of the internal transport path of the post-processing means,
    A post-processing device comprising: a control unit that controls the reverse conveyance unit to reversely convey the sheet to another post-processing device disposed upstream of the post-processing device.
  7. The post-processing means includes:
    7. The post-processing apparatus according to claim 6, wherein the post-processing apparatus has at least one processing function of paper stacking, stapling, folding, punching, cutting, and paper inserter.
  8. 8. The post-processing apparatus according to claim 6, wherein the reverse transport means includes a plurality of rollers and a drive motor that can be driven forward and reverse.
JP2002331182A 2002-11-14 2002-11-14 Image forming system and post processing apparatus Pending JP2004161466A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009078871A (en) * 2007-09-25 2009-04-16 Konica Minolta Business Technologies Inc Paper conveying section and post-processing device
US7703768B2 (en) 2006-07-21 2010-04-27 Konica Minolta Business Technologies, Inc. Image forming system, relay conveyance apparatus and method for installing image forming system
CN101234712B (en) * 2007-01-31 2013-01-16 立志凯株式会社 Post-processing apparatus and image forming system comprising the same
CN103581483A (en) * 2012-08-10 2014-02-12 柯尼卡美能达株式会社 Image forming system and post-processing method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7703768B2 (en) 2006-07-21 2010-04-27 Konica Minolta Business Technologies, Inc. Image forming system, relay conveyance apparatus and method for installing image forming system
CN101234712B (en) * 2007-01-31 2013-01-16 立志凯株式会社 Post-processing apparatus and image forming system comprising the same
JP2009078871A (en) * 2007-09-25 2009-04-16 Konica Minolta Business Technologies Inc Paper conveying section and post-processing device
CN103581483A (en) * 2012-08-10 2014-02-12 柯尼卡美能达株式会社 Image forming system and post-processing method
CN103581483B (en) * 2012-08-10 2016-05-04 柯尼卡美能达株式会社 Image formation system and post-processing approach

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