JP4593813B2 - Optional apparatus for image forming apparatus, image forming apparatus, and image forming system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an image forming apparatus to which a plurality of option devices can be connected and the option device.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, various optional devices that can be connected to an image forming apparatus are prepared, and the functions of the image forming apparatus are expanded in accordance with the user's desire and usage environment.
Such optional devices include a paper feed option device for enabling a large amount of paper feed, a sorter, a duplex unit, and the like, each having a configuration capable of communicating with an image forming apparatus.
[0003]
For example, when a plurality of paper feed option devices are arranged and connected below the image forming apparatus, the image forming apparatus and the plurality of paper feed option devices communicate with each other from a desired paper feed option device to a recording medium such as paper. (Hereinafter referred to as a sheet) is conveyed to an image forming apparatus located downstream of the conveyance path.
[0004]
Conventionally, when connecting an image forming apparatus and a sheet feeding option apparatus for supplying a recording medium and performing medium conveyance control, a controller in the image forming apparatus monitors sheet conveyance control in all sheet feeding option apparatuses, If necessary, the control data is transmitted to the optional device to perform all sheet conveyance control and monitoring processing. Similarly, for a paper discharge option device that performs post-processing on a sheet discharged from the image forming apparatus, a controller in the image forming apparatus performs sheet conveyance control and monitoring processing of all the paper discharge option devices.
As another example, the sheet conveyance control and monitoring process of the optional apparatus for feeding and discharging paper is separated from the controller in the image forming apparatus, and all of the option controllers are integrated to control the sheet conveyance control and monitoring process of the optional apparatus. The optional apparatus is configured to perform sheet conveyance control and monitoring processing.
[0005]
[Problems to be solved by the invention]
However, such a conventional image forming apparatus has the following problems.
[0006]
If the number of sheet feeding option devices is one or the sheet conveyance speed is not fast, the sheet conveyance option device sheet conveyance control and monitoring processing may be performed by the controller or option controller in the image forming apparatus. , Thereby increasing the processing load on the controller is not a problem. However, when multiple optional devices are connected or the sheet conveyance speed is increased, the processing in the controller becomes complicated and high-speed processing is required, increasing the load of control and monitoring processing. In addition, it is necessary to use a high-speed and expensive processing device such as a CPU for the controller.
[0007]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an image forming apparatus, an image forming apparatus, an optional apparatus for the image forming apparatus, an image forming apparatus, and an optional apparatus for the image forming apparatus, which have a small increase in processing load even when a plurality of optional apparatuses are connected. An object of the present invention is to provide an image forming system including optional devices.
[0008]
[Means for Solving the Problems]
  That is, the gist of the present invention is an image forming apparatus.Alternatively, the first connected to the image forming apparatusOptional equipmentEitherConnectableWhat, Image forming apparatusOr first optional deviceConnected to,MoreThe secondAn optional apparatus of an image forming apparatus to which an optional apparatus can be connected, the image forming apparatusOr firstOptional equipmentAnd a second optional deviceA communication means for performing communication and an image forming apparatus orFirstBased on instructions received from the optional device via communication meansOptional deviceOptional device control means for controlling the operation of the machineAnd having,The option device control means is configured to monitor the second option device from the second option device via the communication means in order to monitor the second option device in a state where the image forming apparatus or the first option device and the second option device are connected. Receives information indicating the status of optional devices,Information indicating the status of the received second optional deviceOn the basis of theOptional deviceThe image forming apparatus is an optional apparatus for controlling an image forming apparatus.
[0010]
  Furthermore, another gist of the present invention is directed to an image forming apparatus and an image forming apparatus.Close contactCan continueOptional equipmentInWhatConnected to the image forming device,More,otherOptional devices that can be connected to other optional devicesWithAn image forming system, an optional deviceIs,First communication means for communicating with the image forming apparatus and other option apparatuses; and option device control means for controlling the operation of the option apparatus based on an instruction received from the image forming apparatus via the first communication means. The optional device control means is configured to monitor the other optional devices from the other optional devices via the first communication means in order to monitor other optional devices in a state where the image forming apparatus and the other optional devices are connected to the optional device. Receiving information indicating the status of the other optional device, controlling the operation of the optional device based on the received information on the status of the other optional device,
  Image forming apparatusIs,Second communication means for communicating with option device control means of the option device;Image formation using optional equipmentActioncontrolDoImage forming control means having image forming control meansIs,To monitor the status of optional equipment,Image forming apparatusClose toContinued optional deviceInformation indicating the status of the optional device is received from the optional device control means via the second communication means, and the image forming operation is controlled based on the received information indicating the status of the optional device.It exists in the image forming system characterized by this.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
(Configuration of image forming apparatus)
FIG. 1 is a diagram illustrating a configuration example of an image forming system including an image forming apparatus and an optional apparatus according to an embodiment of the present invention. In this embodiment, the image forming apparatus forms a toner image on a sheet by an electrophotographic process.
[0015]
In the figure, 100 is an image forming apparatus, 101 and 102 are paper feed option devices, and 133 and 134 are paper discharge option devices. The image forming apparatus 100 is disposed above the option device 101, and the option device 101 is disposed above the option device 102.
[0016]
104 to 107 are sheets on which images are transferred by the image forming apparatus, and a plurality of sheets are stacked. The sheets 104 and 105 are placed in a paper feeding device built in the image forming apparatus. Reference numerals 108 to 111 denote pickup rollers for feeding out the sheet, and the group of rollers 112 to 120 conveys the sheet to the electrophotographic process unit 103.
[0017]
The roller pair 117 is installed downstream of the sheet conveyance path from the position where the sheet conveyed in the image forming apparatus 100 and the sheet conveyed from the option apparatus 101 merge. When the preceding sheet is being conveyed in the image forming apparatus 100, the sheet from the option apparatus 101 is temporarily stopped at a position before the roller pair 117.
[0018]
The roller pair 119 is installed downstream from the position where the sheet conveyed in the option apparatus 101 and the sheet conveyed from the option apparatus 102 merge. When the preceding sheet is conveyed in the option apparatus 101, the sheet from the option apparatus 102 is temporarily stopped at a position before the roller pair 119.
[0019]
Reference numeral 121 denotes a connector for connecting the image forming apparatus 100 and the optional apparatus 101 so that they can communicate with each other. The controller 127 in the image forming apparatus 100, the controller 128 in the optional apparatus 101, and the controller 129 in the optional apparatus 102 are connected. A communication line 130a and a power supply control signal line 130b used for communication are relayed. Similarly to 121, reference numeral 122 denotes a connector connecting the optional device 101 and the optional device 102, and relays the communication line 130c and the power control signal line 130d.
[0020]
Reference numeral 123 denotes a tray on which sheets formed with an image by the electrophotographic process unit 103 in the image forming apparatus are stacked, and is conveyed by a roller pair 124 so that the surface on which the image is formed faces down.
[0021]
125 is a discharge port for a sheet on which an image is formed by the electrophotographic process unit 103 in the image forming apparatus, and is conveyed by a roller pair 126 so that the surface on which the image is formed is up.
[0022]
A plurality of sheets 104 to 107 are conveyed by a roller group along a conveyance path indicated by a dotted line and an arrow in FIG. 1, and an image is formed on the surface and discharged onto a 123 tray or a discharge port 125. .
[0023]
Reference numeral 131 denotes a merging point (1) of the sheet conveyance path in the image forming apparatus 100, which is positioned in front of (upstream side) the roller pair 117. A merge point (1) 131 indicates a position where the conveyance path of the sheet 105 conveyed in the image forming apparatus 100 and the sheet 106 conveyed from the option apparatus 101 merge.
[0024]
Reference numeral 132 denotes a merging point (2) of the sheet conveyance path in the optional apparatus 101, which is located in front of the roller pair 119. A merge point (2) 132 indicates a position where the sheet 106 conveyed in the option apparatus 101 and the conveyance path of the sheet 107 conveyed from the option apparatus 102 merge.
[0025]
Reference numeral 133 denotes an optional device connected downstream of the image forming apparatus 100, and discharges the sheet discharged from the image forming apparatus to a tray provided in the optional apparatus 133 or discharges it to the downstream optional apparatus 134.
[0026]
An option device 134 is installed below the option device 133, and is a device that conveys and discharges the sheet conveyed from the option device 133.
[0027]
Reference numerals 135 and 136 denote trays on which the sheets conveyed by the option devices 133 and 134 are stacked, and reference numerals 137 to 142 denote roller pairs for conveying the sheets discharged from the image forming apparatus 100. In FIG. 1, only the roller pairs 138 and 142 for carrying out sheets to the trays 135 and 136 are shown for the sake of simplicity, but in reality, the rollers for carrying out sheets to other trays. Pairs are provided as well.
[0028]
Reference numerals 143 and 144 denote controllers of the option devices 133 and 134, which are connected by a signal line 145c and a power supply control signal line 145d. Further, the signal line 145 a and the power supply control signal line 145 b connect the controller 127 and the controller 143 in the image forming apparatus 100. Reference numerals 149 and 150 denote connectors installed between the image forming apparatus 100 and the option apparatus 133 and between the option apparatuses 133 and 134, which relay the signal lines 145a and 145c and the power supply control signal lines 145b and 145d.
[0029]
However, the connectors 121, 122, 149, 150 may be replaced with cables or other communication means that can be connected in the order of the transport path.
[0030]
(Configuration of controller)
FIG. 2 is a block diagram showing the configuration and connection relationship of the controller 127 in the image forming apparatus 100, the controller 128 in the option apparatus 101, and the controller 129 in the option apparatus 102. However, the controllers 143 and 144 in the option devices 133 and 134 are not shown because they have the same configuration as the controllers 128 and 129.
[0031]
Reference numeral 200 denotes a CPU 127 that controls the image forming apparatus and controls image formation and sheet conveyance. The CPU 200 includes a ROM 200a, a RAM 200b, and a timer 200c. However, the ROM 200a, the RAM 200b, and the timer 200c may be installed outside the CPU 200.
[0032]
The ROM 200a always holds the processing contents to be executed by the CPU 200, and software for image forming processing, sheet conveyance processing, and communication processing is written therein.
The RAM 200b temporarily stores data necessary for the CPU 200 to execute image forming processing, sheet conveyance processing, and communication processing.
The timer 200c generates various timings when performing image forming processing, sheet conveyance processing, and communication processing.
[0033]
An image forming circuit 201 is a circuit for performing an electrophotographic process when an image is formed on a sheet by the image forming apparatus.
Reference numeral 202 denotes a circuit for controlling various actuators (not shown) that are driven when performing sheet conveyance and image forming processing in the image forming apparatus.
[0034]
Reference numeral 203 denotes a circuit for inputting output signals from various sensors (not shown) to the CPU 200 when performing sheet conveyance and image forming processing in the image forming apparatus.
Reference numeral 204 denotes a circuit for performing processing for turning on / off the power from the image forming apparatus to the option apparatus, and controls the power supply circuit of the option apparatus 101 via the power control signal line 130b.
[0035]
Reference numeral 206 denotes a circuit for performing communication processing between the image forming apparatus and the optional device, and is connected to the optional device via a communication line 130d. However, the connection form is not particularly limited.
[0036]
Reference numerals 207 and 214 denote CPUs in the controllers 128 and 129, respectively, which control the option apparatuses 101 and 102 and control sheet conveyance to the image forming apparatus 100. The CPUs 207 and 214 include ROMs 207a and 214a. RAMs 207b and 214b and timers 207c and 214c are incorporated. However, the ROMs 207a and 214a, the RAMs 207b and 214b, and the timers 207c and 214c may be installed outside the CPUs 207 and 214.
[0037]
The ROMs 207a and 214a always hold the processing contents to be executed by the CPUs 207 and 214, and are written with software regarding sheet conveyance processing and communication processing.
The RAMs 207b and 214b hold data temporarily required when the CPUs 207 and 214 execute sheet conveyance processing and communication processing.
[0038]
The timers 207c and 214c are for generating various timings when performing sheet conveyance processing and communication processing.
Reference numerals 212 and 218 denote circuits for controlling various actuators (not shown) that are driven when the sheet is conveyed in the option apparatuses 101 and 102.
[0039]
Reference numerals 213 and 219 denote circuits for inputting output signals from various sensors (not shown) to the CPUs 207 and 214 when performing sheet conveyance processing in the option apparatuses 101 and 102.
Reference numerals 209 and 216 denote circuits for performing the process of turning on / off the power of other option devices from the option device, and 209 controls the power supply circuit of the option device via the power control signal line 130d.
[0040]
Reference numerals 211 and 217 denote circuits for performing communication processing between the image forming apparatus 100 and the optional apparatuses 101 and 102, and are connected to the optional apparatus via the communication line 130c. However, the connection form is not particularly limited.
[0041]
(Operation at power-on)
FIGS. 3A to 3C are flowcharts showing processing procedures after the image forming apparatus 100 and the optional apparatuses 101, 102, 133, and 134 are turned on. 3A shows the operation of the image forming apparatus 100, FIG. 3B shows the operation of the option devices 101 and 133, and FIG. 3C shows the operation of the option devices 102 and 134, respectively.
[0042]
In step S100, the CPU 200 is initialized immediately after the image forming apparatus 100 is turned on. In the next step S101, the timer 200c for measuring the time until the option device 101 connected is turned on is started. This is because, in order to prevent voltage fluctuations in peripheral AC lines (not shown) due to simultaneously turning on the power of all the apparatuses at the same time, in order to provide a difference in start-up time and in order from an optional apparatus close to the image forming apparatus 100. This is for recognizing one optional device connected upstream or downstream.
[0043]
In step S102, it is confirmed whether the predetermined time has elapsed by the timer 200c activated in step S101. If the predetermined time has elapsed, a signal for turning on the option device 101 is output in the next step S103.
[0044]
On the other hand, in step S200 (FIG. 3B), the option device 101 activates a power supply by a signal output to the option device 101, and performs initialization processing of the CPU 207 in the option device 101 in step S201.
[0045]
In step S202, a 207c timer for turning on the power of the option device 102 connected further upstream of the option device 101 is started.
[0046]
In step S203, it is confirmed whether or not a predetermined time has elapsed by the 207c timer activated in step S200, and if it has elapsed, a signal for powering on the option device 102 further upstream is output in step S204.
[0047]
In step S <b> 205, information on the option device 101 is transmitted to the image forming apparatus 100 through a communication process after a predetermined time since the option device 101 is turned on. This transmission content is information related to the function and status of the option device 101.
[0048]
The data transmitted in step S205 is received by the image forming apparatus 100 (step S104). In step S105, the image forming apparatus 100 recognizes that the 100 option device is connected one upstream on the sheet conveyance path, and the option device. 101 is set on the RAM 200b.
[0049]
On the other hand, in the option device 102, the power-on signal output by the option device 101 in step S204 is received in step S300 (FIG. 3C), the option device 102 is activated, and then in the option device 102 in step S301. The CPU 214 is initialized.
[0050]
In step S303, processing for turning on the power of the optional device connected further upstream is performed. In this embodiment, no other option device is connected further upstream of the option device 102, but the same power-on is also applied to the configuration of three or more units where the paper feed option device is further connected upstream of the option device 102. The signal is output.
[0051]
In step S305, information about the option device 102 is transmitted to the downstream option device 101. The option device 101 that has received the information of the option device 102 in step S206 (FIG. 3B) recognizes that the option device 102 is connected one upstream of the option device 101 in step S207, and Is set on the RAM 207 b and the device information of the option device 102 is transferred to the image forming apparatus 100.
In step S <b> 305, the option apparatus 102 may be configured to directly transmit its information to the image forming apparatus 100.
[0052]
In step S107, the image forming apparatus 100 recognizes that the option device 102 is connected two upstream in the sheet conveyance path, and sets the connection state with the option device 102 on the RAM 200b.
Also, in the configuration of three or more units in which a plurality of paper feed option devices are further connected upstream of the option device 102, the device information is sequentially transmitted to the downstream option device, and the received downstream option device is connected upstream. It is assumed that the device information is stored. Further, the image forming apparatus 100 sets the apparatus information and connection status of all the upstream sheet feeding option apparatuses on the RAM 200b.
[0053]
However, as a process for setting the connection state between the option apparatuses 101 and 102, the option apparatus 102 transmits only the image forming apparatus 100 without transmitting its own apparatus information to the option apparatus 101, and forms an image. The device 100 may transmit the information of the option device 102 to the option device 101.
[0054]
According to the flowchart shown in FIG. 3, the image forming apparatus 100 can turn on the power of the optional device 101 installed one upstream, and the optional device 101 is installed one optional upstream. Can be turned on. Further, the image forming apparatus 100 can recognize information and connection status of the upstream option devices 101 and 102, and the option device 101 can recognize information and connection status of the one upstream option device 102.
[0055]
In the present embodiment, the option devices 133 and 134 connected downstream of the image forming apparatus 100 perform the same operations as those of the option devices 101 and 102 except that the power-on sequence is changed from upstream to downstream. That is, all the options can be obtained by replacing the process of sequentially turning on the power from the image forming apparatus 100 to the upstream side and sequentially receiving the option apparatus information to the process of sequentially turning on the power to the downstream side and sequentially receiving the option apparatus information. It is possible to recognize the power-on of the device, information and connection status.
Further, the same applies to a configuration in which a plurality of option devices other than the paper feed option devices 101 and 102 and the paper discharge option devices 133 and 134 are connected upstream or downstream.
[0056]
At this time, it is optional to recognize all option devices connected to the upstream side as viewed from the image forming apparatus 100 and then recognize the downstream option device or vice versa. Further, if the image forming apparatus 100 can independently receive the device information from the upstream option device and the device information from the downstream option device, the power may be turned on in parallel.
[0057]
(Sheet conveyance (supply) processing)
FIGS. 4A to 4D and FIGS. 5A to 5C show the sheet conveying process in the image forming apparatus 100 and the optional apparatus (not shown in FIG. 1) upstream from the optional apparatuses 101, 102, and 102. FIG. It is a flowchart to show.
[0058]
4A and 5A show the operation of the image forming apparatus 100, FIGS. 4B and 5B show the operation of the optional apparatus 101, and FIGS. 4C and 5C. 4 shows the operation of the option device 102, and FIG. 4D shows the operation of the option device upstream of 102.
[0059]
Hereinafter, the sheet 1 (FIG. 1, sheet 106) is supplied from the optional device 101, and the sheet 2 (same sheet 107) is supplied from the optional device 102 via the optional device 101 to the image forming apparatus 100, and the sheet 3 (non-sheet) The operation will be described by taking as an example a case in which the image forming apparatus 100 is supplied from the option device upstream of the option device 102 and supplied to the image forming apparatus 100 via the option device 102 and the option device 101.
[0060]
  First, in step S <b> 400, the image forming apparatus 100 transmits sheet conveyance information to the option devices 101, 102, and the option device upstream of 102.
  In the sheet conveyance information, any of the optional devices 101, 102, and an optional device upstream of 102 is designated to supply the sheet.InstructionsAt the same time, the downstream option device is instructed to convey the sheet. When the supply of a plurality of sheets is instructed, the conveyance of each sheet is controlled so that the sheets are supplied to the image forming apparatus 100 in the instructed order.
[0061]
In step S500, the option apparatus 101 receives and recognizes the conveyance information of the sheets 1, 2, and 3 from the image forming apparatus 100. Further, the received conveyance information of the sheet 1 and the sheets 2 and 3 is stored in the RAM 207b. The option apparatus 101 receives the sheet 2 conveyance information in order to convey the sheet 2 from the option apparatus 102. Further, since the option apparatus 101 also conveys the sheet 3 from the option apparatus upstream of 102, it is assumed that the conveyance information of the sheet 3 is received. Next, the conveyance of the sheet 1 is started (step S501). Also, the timer 207c is started. Hereinafter, a timer in each apparatus is set to determine the sheet conveyance timing when each sheet is conveyed, and is used for conveyance control.
[0062]
On the other hand, the option device 102 receives and recognizes the conveyance information of the sheet 2 from the image forming apparatus 100 in step S600, and the option device 102 conveys the sheet 3 from the option device upstream of the 102. Is also received. Further, the received conveyance information of the sheet 2 and the sheet 3 is stored in the RAM 214b. Then, the conveyance of the sheet 2 is started (step S601). Also, the timer 214c is started.
[0063]
When the option apparatus 101 starts conveying the sheet 1 in step S <b> 501, the image forming apparatus 100 conveys the sheet 1 with a signal from the sensor input circuit 203 when the sheet 1 is conveyed into the image forming apparatus 100. Confirmation and conveyance control are started (step S401). Further, the image forming apparatus 100 may perform a driving operation of the roller pair 118 in advance in order to convey the sheet 1 without detecting a sensor signal.
[0064]
In step S502, the option apparatus 101 determines whether or not the sheet 1 has reached the confluence (1) 131 before the roller pair 117 by the timer 207c, and if it has reached, the conveyance of the sheet 1 is stopped in step S503. . However, if there is no other sheet at the junction (1) 131, the conveyance of the sheet 1 may be continued without stopping.
[0065]
In step S504, the option apparatus 101 transmits data for notifying the image forming apparatus 100 that the conveyance of the sheet 1 has been stopped. In step S402, the image forming apparatus 100 receives data indicating that the conveyance of the sheet 1 has been stopped. And recognize. Further, the conveyance of the sheet 1 in the image forming apparatus 100 is stopped.
[0066]
In the optional device 102 that has started transporting the sheet 2 in step S601, the timer 214c determines whether or not the sheet 2 has reached the junction (2) 132 before the roller pair 119 in step S602. In step S603, the conveyance of the sheet 2 is stopped. However, if there is no other sheet at the junction (2) 132, the conveyance of the sheet 2 may be continued without stopping.
[0067]
Next, the option device 102 transmits data for notifying the conveyance stop of the sheet 2 to the option device 101 in step S604. This data is received by the option device 101 (step S505), and the option device 101 recognizes that the conveyance of the sheet 2 has stopped.
[0068]
In step S403, the image forming apparatus 100 determines whether the sheet 1 can pass the junction (1) 131 in the image forming apparatus 100. If the sheet 1 can pass, the process proceeds to step S404, and the sheet 1 is sent to the option apparatus 101. Data indicating that it can be transported is transmitted.
[0069]
In step S506 and step S507, the option apparatus 101 monitors the communication data, and the data output from the image forming apparatus 100 in step S404 is data indicating that the sheet 1 can pass the junction (1) 131. When it is determined that there is, the process proceeds to step S508.
[0070]
In step S508, the conveyance process of the sheet 1 in the option apparatus 101 is resumed. In step S405, conveyance of the sheet 1 in the image forming apparatus 100 is resumed.
[0071]
The option device 101 transmits data indicating that the sheet 2 can pass through the joining point (2) 132 before the roller pair 119 to the option device 102 when the sheet 2 can pass (step S509). In the optional device 102, communication is monitored to detect whether or not the sheet 2 that has been stopped in step S603 can pass through the confluence (2) 132 (steps S606 and S607). (2) After determining that the data indicating that the passage of 132 is possible is received, the conveyance of the sheet 2 is resumed in step S608.
[0072]
When the sheet 1 is discharged from the option apparatus 101, the sheet 1 discharge completion data is transmitted to the image forming apparatus 100 (step S510), and the image forming apparatus 100 receives and recognizes the sheet 1 discharge completion data in step S406.
Then, the image forming apparatus 100 performs an image forming process on the sheet 1 conveyed into the image forming apparatus 100 in step S407.
[0073]
On the other hand, the optional device 101 that has finished discharging the sheet 1 starts conveying the sheet 2 conveyed from the optional device 102 to the optional device 101 (step S511).
[0074]
When the option device 102 finishes discharging the sheet 2, the option device 101 transmits data indicating completion of discharge of the sheet 2 to the option device 101 in step S610, and the option device 101 receives data indicating completion of discharge of the sheet 2 in step S512.
[0075]
In step S <b> 408, when the image forming apparatus 100 detects that the sheet 2 has been conveyed to the image forming apparatus 100 based on a signal from the sensor input circuit 203, the image forming apparatus 100 starts conveying the sheet 2. Further, the image forming apparatus 100 may perform a driving operation of the roller pair 118 in advance in order to convey the sheet 2 without detecting the sensor signal.
[0076]
In step S513, the option apparatus 101 determines whether or not the sheet 2 has reached the merging point (1) 131 in front of the roller pair 117. If the sheet has reached, the option apparatus 101 conveys the sheet 2 in step S514 (FIG. 5B). To stop. However, if there is no other sheet at the junction (1) 131, the conveyance of the sheet 2 may be continued without stopping.
[0077]
In step S515, the option apparatus 101 transmits data for notifying the image forming apparatus 100 of the conveyance stop of the sheet 2, and the image forming apparatus 100 receives and recognizes this data indicating that the sheet 2 has stopped conveyance. Then, the conveyance of the sheet 2 in the image forming apparatus 100 is stopped (step S409).
[0078]
In step S410, it is determined whether or not the sheet 2 can pass the junction (1) 131 in the image forming apparatus 100. If the sheet 2 can pass, the process proceeds to step S411, and it is confirmed that the sheet 2 can be conveyed to the option apparatus 101. Send the indicated data.
In step S517, the option apparatus 101 monitors the communication data, and when it is determined in step S518 that the sheet 2 can pass the junction (1) 131, the process proceeds to step S519.
[0079]
In step S519, the conveyance process of the sheet 2 in the option apparatus 101 is resumed. Further, the image processing apparatus 100 also restarts the conveyance process of the sheet 2 in step S412.
When the sheet 2 is discharged from the option apparatus 101 in step S521, data indicating completion of discharge of the sheet 2 is transmitted to the image forming apparatus 100 by communication processing.
[0080]
The image forming apparatus 100 that has received this data in step S413 performs an image forming process on the sheet 2 in step S414.
The conveyance control for the sheets 1 and 2 has been described above. As for the sheet 3, as with the sheet 2, the option device upstream from the 102 to the option device 102 downstream, the option device 101 further downstream, and The images are sequentially conveyed to the image forming apparatus 100 as shown in steps S620 to S628. Finally, in steps S419, S529, and S619, the sheets 1 to 3 are conveyed to the image forming apparatus 100 in this order, and image formation is performed.
[0081]
According to the sheet conveyance and monitoring processing shown in the flowcharts of FIGS. 4 and 5, the image forming apparatus 100 first supplies sheet conveyance information to all the optional devices 101, 102, and 102 connected upstream. , The sheet conveyance control and monitoring of only the option device 101 one upstream after the sheet conveyance processing is started, and the option device 101 controls and monitors the sheet conveyance of only the option device 102 one upstream. Thus, the option device 102 can perform image formation processing and conveyance processing for all sheets by performing sheet conveyance control and monitoring of only the one upstream option device.
Further, even in a configuration in which a plurality of paper feed option devices are connected upstream, each device performs image transport processing and monitoring of the sheet feed option device of one upstream so that image formation processing is performed on all sheets. In addition, the conveyance process can be performed.
[0082]
(Sheet conveyance (discharge) processing)
FIGS. 6A to 6C and FIGS. 7A to 7C are flowcharts showing sheet conveyance processing in the image forming apparatus 100 and the optional devices 133 and 134. FIG.
FIGS. 6A and 7A show the operation of the image forming apparatus 100, FIGS. 6B and 7B show the operation of the optional device 133, and FIGS. 6C and 7C. Indicates the operation of the optional device 134, respectively.
[0083]
Hereinafter, sheet conveyance and ejection processing will be described by taking as an example a case in which the sheets 1 and 2 are conveyed, discharged, and stacked from the image forming apparatus 100 to the option device 134 via the option device 133.
First, in step S <b> 700, sheet conveyance information is transmitted from the image forming apparatus 100 to the option apparatuses 133 and 134. The sheet conveyance information designates an optional device to be stacked and instructs discharge and stacking of sheets, and instructs the upstream option device to convey the sheet.
The sheet conveyance information is received by the option devices 133 and 134 in steps S800 and S900.
[0084]
In step S <b> 701, data for inquiring whether or not the sheet 1 can be discharged is transmitted to the option device 133 connected immediately downstream of the image forming apparatus 100. In step S801, the option device 133 receives the inquiry data, and determines in step S802 whether the sheet 1 can be conveyed. If the sheet 1 cannot be transported, the option device 133 notifies the image forming apparatus 100 to that effect in step S803. If it is determined that the sheet 1 can be transported, the optional device 133 proceeds to step S803. In step S804, the image forming apparatus 100 is notified of this. In either case, these notifications are received by the image forming apparatus 100 during communication monitoring (step S702).
[0085]
Based on the notification received in step S702, the image forming apparatus 100 determines in step S703 whether the sheet 1 can pass through the discharge port 125 of the image forming apparatus 100. If it can pass, the process proceeds to step S704. On the other hand, if it cannot pass, communication monitoring processing is performed in step S702 until the option device 133 notifies that the sheet can be conveyed.
[0086]
In step S704, a notice is given to the optional device 133 that the sheet 1 is discharged from the image forming apparatus 100, and then discharge of the sheet 1 is started in step S705. The option device 133 starts the conveyance of the sheet 1 in step S806 after receiving the discharge notice of the sheet 1 in step S805.
[0087]
Next, in step S807, the option device 133 inquires of the option device 134 located downstream whether or not the sheet 1 conveyed in the option device 133 can be discharged.
[0088]
The inquiry data is received by the option device 134 in step S901, and it is determined whether or not the sheet 1 can be conveyed in step S902. If the conveyance of the sheet 1 is impossible, the option device 133 is notified in step S903. If the sheet 1 can be conveyed, a notification is made in step S904 that the sheet 1 can be conveyed.
[0089]
The option device 133 monitors communication in step S808, and determines in step S809 whether the sheet 1 can be discharged based on the notification received from the option device 134. If the discharge of the sheet 1 is possible, the process proceeds to the next step S810, and the image forming apparatus 100 is notified that the discharge of the sheet 1 is started. In subsequent step S811, a discharge notice is notified to the option device 134 before the sheet 1 is discharged from the option device 133.
[0090]
When the option device 134 receives the ejection notice from the option device 133 in step S905, the option device 134 starts conveying the sheet 1 conveyed to the option device 134 (step S906).
[0091]
For example, when the discharge of the sheet 1 is completed, the image forming apparatus 100 makes an inquiry to the option device 133 as to whether the discharge of the sheet 2 is possible (step S707).
[0092]
The option device 133 receives this inquiry in step S812, and in step S813, the option device 133 determines whether the sheet 2 can be conveyed. If the conveyance of the sheet 2 is impossible due to reasons such as the processing of the sheet 1, the fact is notified to the image forming apparatus 100 in step S814. If the image can be conveyed, the image forming apparatus 100 is notified in step S815 that the image can be conveyed.
The determination result of the option device 133 is received by the image forming apparatus 100 in step S708, and the image forming apparatus 100 determines whether the sheet 2 can pass through the discharge port 125 based on the received determination result (step S709). If it is determined that it cannot pass, it waits until it is determined that it can pass. On the other hand, if it is notified from the optional device 133 that the sheet can be passed, the optional device 133 is notified of a sheet discharge notice in step S710. This notification is received by the option device 133 in step S816, and the option device 133 recognizes the discharge notice of the sheet 2.
[0093]
Following the advance notice of discharging the sheet 2, the image forming apparatus 100 starts discharging the sheet 2 in step S711, and the optional device 133 also starts transporting the sheet 2 in step S817.
[0094]
In step S818, the image forming apparatus 100 is notified of the completion of the discharge of the sheet 1 in the option device 133, and the image forming apparatus 100 receives and recognizes in step S712. Next, the option device 133 inquires of the option device 134 whether or not the sheet 2 can be discharged in step S819.
[0095]
This inquiry is received by the option device 134 in step S907. In step S908, it is determined whether the option device 134 can convey the sheet 2. If the conveyance is impossible, the determination result is notified to the option device 133 in step S909. If it is determined that the conveyance is possible, the determination result is notified to the option device 133 in step S910.
[0096]
The option device 133 receives the result of whether or not the sheet 2 can be conveyed by the option device 134 in step S820. In step S821, it is determined whether or not the option device 134 notifies that the sheet 2 can be discharged, and waits until there is a notification to that effect.
[0097]
When the preceding sheet 1 is discharged from the option device 134, the option device 134 notifies the option device 133 of the fact (step S911). Upon receiving the completion of conveyance of the sheet 1 in the option device 134 in step S822, the option device 133 notifies the image forming apparatus 100 that the sheet 1 has been discharged from the option device 134 in step S823, and in step S824, the sheet is conveyed. 2 is notified to the optional device 134.
[0098]
The option device 134 receives and recognizes the sheet 2 discharge notice from the option device 133 in step S912. In step S913, the conveyance of the sheet 2 is started based on the discharge notice received in step S912.
[0099]
On the other hand, the option device 133 starts discharging the sheet 2 in step S825 following the discharge notice output in step S824. When the conveyance of the sheet 2 in the optional device 133 is completed, the image forming apparatus 100 is notified of that fact in step S826. The image forming apparatus 100 receives this notification in step S714 and recognizes it.
[0100]
When the discharge of the sheet 2 is completed, the option device 134 notifies the option device 133 to that effect in step S914 and ends the processing. When the option device 133 receives the completion of discharging the sheet 2 from the option device 134 in step S827, the option device 133 notifies the image forming apparatus 100 that the sheet 2 is discharged from the option device 134 in step S828. In step S715, the image forming apparatus 100 receives and recognizes the completion of discharging the sheet 2 from the optional device 134, and the series of discharge processing ends.
[0101]
According to the sheet conveyance control and monitoring processing shown in the flowcharts of FIGS. 6 and 7, the image forming apparatus 100 first transmits sheet conveyance information to all the connected optional devices 133 and 134, and the sheet conveyance is performed. Since the processing is started, only one option device 133 downstream is controlled and monitored, and the option device 133 controls and monitors only one option device 134 downstream, so that all An image forming process and a conveying process can be performed on the sheet.
Further, even in a configuration in which a plurality of paper discharge option devices are connected downstream in addition to the paper discharge option devices 133 and 134, each device performs sheet conveyance control and monitoring of one paper discharge option device downstream, The conveyance process can be performed on all sheets on which images have been formed.
[0102]
(Second Embodiment)
Next, the sheet conveyance processing operation of the image forming apparatus and the optional apparatus according to the second embodiment of the present invention will be described using the flowcharts shown in FIGS. FIGS. 8A to 8C and FIGS. 9A to 9C are flowcharts illustrating sheet conveyance processing in the image forming apparatus 100 and the optional apparatuses 133 and 134. 8A and 9A show the operation of the image forming apparatus 100, FIGS. 8B and 9B show the operation of the optional device 133, and FIGS. c) shows the operation of the optional device 134, respectively.
[0103]
In the present embodiment, the configuration of the image forming apparatus itself is the same as that of the first embodiment shown in FIG. Further, in the sheet conveyance processing described below, it is assumed that the sheet 1 and the sheet 2 are discharged from the option device 134 via the option device 133 as in the first embodiment.
[0104]
First, in step S716, the conveyance information of the sheets 1 and 2 is transmitted from the image forming apparatus 100 to the option device 134. The transport information is received by the option devices 133 and 134 in steps S829 and S915, respectively. When the optional devices 133 and 134 receive the conveyance information, they transmit the time until the sheets 1 and 2 can be conveyed by their own devices to the devices connected upstream in steps S830 and S916.
[0105]
In step S831, the option device 133 receives the sheet 1 and 2 conveyance waiting time data from the option device 134, and transmits it to the image forming apparatus 100 together with the waiting time of the option device 133 in step S832.
[0106]
In step S717, the image forming apparatus 100 receives the sheet 1, 2 conveyance waiting time of the option device 133, and receives the waiting time of the option device 134 in step S718.
[0107]
In step S719, it is determined whether the sheet 1 can pass through the discharge port 125. This determination is based on the conveyance waiting time of the sheets 1 and 2 received in step S717, and after passing a count corresponding to the conveyance waiting time by the timer 200c in the image forming apparatus 100, can pass through the 215 discharge port. To do.
[0108]
Here, a method for calculating the conveyance waiting time will be described. The time from when a certain sheet (referred to as the preceding sheet) is conveyed and carried into the optional device 133 or 134 until the optional device 133 or 134 can accept the next sheet (referred to as the subsequent sheet) The time during which the following sheet does not catch up with the preceding sheet without affecting the conveyance and post-processing, that is, the conveyance waiting time is the conveyance distance to the sheet discharge port in the optional device, the length of the sheet to be conveyed, the conveyance speed, It can be determined by the post-processing operation time.
[0109]
Therefore, the transport waiting time determined by the combination of these is stored in advance in a non-volatile storage medium such as a ROM in the optional device and is referred to or calculated in real time using these values. It is possible to obtain
[0110]
In the present embodiment, it is assumed that the optional devices 133 and 134 calculate their own sheet conveyance waiting time when receiving the sheet conveyance information. When the two option devices 133 and 134 are connected to the image forming apparatus 100 as in the present embodiment, the discharge waiting time in the image forming apparatus 100 can be obtained as follows.
[0111]
That is, assuming that the transport waiting time calculated by the option device 133 is T1 [S] and the transport waiting time calculated by the option device 134 is T2 [S], the option device 134 passes its own transport waiting time T2 via the option device 133. When transmitting [S] to the image forming apparatus 100, the optional device 133
When T1> = T2, the conveyance waiting time of the image forming apparatus 100 is T1.
When T1 <T2, the conveyance waiting time of the image forming apparatus 100 is T2.
As a result, the conveyance waiting time is transmitted to the image forming apparatus 100.
[0112]
Of course, unlike FIG. 8, each of the optional devices 133 and 134 individually and directly transmits T1 [S] and T2 [S] to the image forming apparatus 100, and the above-described determination (calculation) is performed by the image forming apparatus 100. You may comprise so that it may perform.
If three or more optional devices are connected, the conveyance waiting time of the image forming apparatus 100 may be determined in accordance with the option device having the longest conveyance waiting time.
[0113]
The time required for communication between each device is sufficiently shorter than the normal transport waiting time, and even if the transport waiting time is calculated step by step by an upstream device, the number of optional devices is equal to the transport waiting time. Does not affect the time required for calculation. However, in the case where optional devices with extremely low computing power are mixed, it may be configured such that the conveyance waiting time is directly transmitted to the image forming device 100 when the image forming device 100 recognizes the optional device. Is possible.
[0114]
When the conveyance waiting time elapses, the image forming apparatus 100 starts discharging the sheet 1 in step S720 and transmits a conveyance advance notice to the option device 133.
In step S833, the option device 133 starts conveying the sheet 1 when receiving the conveyance advance notice transmitted by the image forming apparatus 100 in step S720. In step S834, whether or not the sheet 1 has reached a predetermined position in the vicinity of the discharge port is detected by detecting the leading end position of the sheet with a sensor (not shown), and if it is detected that the sheet 1 has reached the predetermined position, the sheet 1 is detected. Starts to be discharged (step S835). Further, when the discharge of the sheet 1 is started, a discharge notice is transmitted to the option device 134.
[0115]
In step S917, the option device 134 starts conveying the sheet 1 when receiving the discharge notice transmitted by the option device 133 in step S835.
[0116]
When the discharge of the sheet 1 is completed, the option apparatus 133 notifies the image forming apparatus 100 to that effect in step S836. The image forming apparatus 100 receives this notification in step S721, and the sheet 1 is discharged from the option apparatus 133. Recognize that In step S722, it is determined whether or not the subsequent sheet 2 can pass through the discharge port 125. This determination is based on the sheet 2 conveyance waiting time received in step S718, and can be passed through the 215 discharge port after being counted by the timer 200c in the image forming apparatus 100. When the sheet can be passed, the discharge of the sheet 2 is started in step S723 and a conveyance advance notice is transmitted to the option device 133.
[0117]
In step S837, the option apparatus 133 starts conveyance of the sheet 2 when the conveyance advance notice transmitted by the image forming apparatus 100 in step S723 is received. Next, in step S838, it is detected by a sensor (not shown) whether or not the sheet 2 has reached a predetermined position near the discharge port. When it is detected that the sheet 2 has reached the predetermined position, discharge of the sheet 2 is started (step S838). S839). Further, when the discharge of the sheet 2 is started, a discharge notice is transmitted to the option device 134.
[0118]
On the other hand, also in the option device 134, when the discharge notice transmitted from the option device 133 in step S839 is received in step S918, the conveyance of the sheet 2 is started. In step S919, when the sheet 1 is discharged from the option device 134, the option device 133 as an upstream device is notified.
[0119]
The option device 133 receives the discharge of the sheet 1 from the option device 134 in step S840, and notifies the image forming apparatus 100 of the discharge of the sheet 1 from the option device 134 in step S841. In step S724, the image forming apparatus 100 recognizes that the sheet 1 has been discharged from the option device 134.
[0120]
In step S842, the option apparatus 133 notifies the image forming apparatus 100 that the sheet 2 has been discharged from the option apparatus 133, and the image forming apparatus 100 recognizes this in step S725.
[0121]
When the sheet 2 is finally discharged, the option device 134 notifies the option device 133 in step S920. This notification is received by the option device 133 in step S843, and then transmitted to the image forming apparatus 100 in step S844. In step S <b> 726, the image forming apparatus 100 recognizes that the sheet 2 has been completely discharged from the option device 134.
[0122]
As described in the present embodiment, the image forming apparatus receives the time until the sheet can be discharged in order from a plurality of option apparatuses connected downstream, and is connected downstream of the image forming apparatus. By performing sheet conveyance control and monitoring processing with each optional device, the processing load can be reduced.
Further, in a configuration in which a plurality of paper discharge option devices are connected downstream in addition to the paper discharge option devices 133 and 134, the processing load can be similarly reduced.
[0123]
(Third embodiment)
Next, the sheet conveying operation of the image forming apparatus and the optional apparatus according to the third embodiment of the present invention will be described. In the present embodiment, in the processing of step S104 and step S106 described with reference to the flowchart of FIG. 3 in the first embodiment, as the device information from the option devices 101 and 102, other option devices connected upstream Whether or not the sheet conveyance control and the monitoring process can be performed is acquired as communication data. In step S105 and step S107, the image forming apparatus 100 determines the processing capability of the option apparatuses 101 and 102, and the option apparatus 102 is controlled and monitored. The sheet conveyance control and monitoring processing of the option device 102 directly upstream is performed without using the option device 101 that cannot be performed.
[0124]
Although not shown, the image forming apparatus 100 directly performs sheet conveyance control and monitoring processing for the optional devices 133 and 134 connected downstream of the image forming apparatus 100 as well.
[0125]
The processing at that time will be described with reference to the flowchart shown in FIG. FIG. 10 shows a modification of the sheet conveyance (supply) process described with reference to the flowchart shown in FIG. 4 in the first embodiment. The image forming apparatus 100 replaces the option device 101 with the upstream option device 102. Processing after determining that control and monitoring processing cannot be performed is shown. In FIG. 10, the same step number is assigned to the same process as in FIG. 4, and detailed description thereof is omitted.
[0126]
In step S409, processing corresponding to step S505 in FIG. 4 is performed by the image forming apparatus 100, and the sheet conveyance state of the option apparatus 102 is directly grasped by the image forming apparatus 100. Similarly, the process of step S509 in FIG. 4 is performed by the image forming apparatus 100 in step S411, and the option apparatus 102 is instructed to resume conveyance of the sheet 2 while monitoring the state of the sheet 1.
[0127]
Further, in step S413, the image forming apparatus 100 recognizes that the process corresponding to step S512 in FIG. 4, that is, the sheet 2 is discharged from the option apparatus 102, and the option apparatus 101 continues to convey the sheet 2. Recognize
[0128]
Thereafter, the image forming apparatus 100 performs conveyance control and monitoring processing of the sheet 2 in the option apparatus 101.
[0129]
In the present exemplary embodiment, only the processing of the sheet supply option device has been described, but the sheet discharge option device connected downstream of the image forming device 100 is also connected to the image forming device 100 via an option device having a low processing capacity. The same processing can be performed by directly performing the control.
[0130]
As described above, according to the present embodiment, the image forming apparatus acquires the processing capability of each option device connected by the communication unit after the power is turned on, and the option device connected upstream or downstream is the other. If it is determined that the optional device cannot be controlled and monitored, it is possible to directly control the optional device connected one upstream (or downstream) of the optional device.
[0131]
[Other Embodiments]
In the first to third embodiments described above, two optional devices are installed upstream of the image forming apparatus 100, two optional devices are connected downstream, and the number of sheets conveyed is two. The number of options to be connected, the number of sheets to be conveyed, and the timing of image forming processing, discharge completion processing, and the like are all arbitrary.
[0132]
In addition, a communication method performed between the image forming apparatus and the optional apparatus is not particularly limited, and any protocol can be used.
[0133]
Further, in the above-described embodiment, only the optional device related to sheet conveyance has been described. However, an optional device that is continuously connected from the image forming apparatus can be used other than the optional device for sheet conveyance. The effect of the present invention can be realized.
[0134]
In FIG. 3, the case where the timer is started when the power is turned on and the downstream option device is turned on when the timer times out has been described. However, for example, a predetermined process such as an initialization process performed after the power is turned on is performed. It may be configured to power on the downstream option device when it is finished.
[0135]
Note that the present invention can be applied to a system including a plurality of devices (for example, a host computer, an interface device, a reader, and a printer), and a device (for example, a copying machine and a facsimile device) including a single device. You may apply to.
[0136]
Another object of the present invention is to supply a storage medium (or recording medium) in which a program code of software that realizes the functions of the above-described embodiments is recorded to a system or apparatus, and the computer (or CPU or CPU) of the system or apparatus. Needless to say, this can also be achieved by the MPU) reading and executing the program code stored in the storage medium. In this case, the program code itself read from the storage medium realizes the functions of the above-described embodiments, and the storage medium storing the program code constitutes the present invention. Further, by executing the program code read by the computer, not only the functions of the above-described embodiments are realized, but also an operating system (OS) running on the computer based on the instruction of the program code. It goes without saying that a case where the function of the above-described embodiment is realized by performing part or all of the actual processing and the processing is included.
[0137]
Furthermore, after the program code read from the storage medium is written into a memory provided in a function expansion card inserted into the computer or a function expansion unit connected to the computer, the function is determined based on the instruction of the program code. It goes without saying that the CPU or the like provided in the expansion card or the function expansion unit performs part or all of the actual processing and the functions of the above-described embodiments are realized by the processing.
[0138]
When the present invention is applied to the above-described storage medium, the storage medium stores program codes corresponding to the flowcharts described above (shown in any one or more of FIGS. 3 to 10).
[0139]
【The invention's effect】
As described above, according to the image forming apparatus and the optional apparatus of the present invention, each apparatus monitors and controls the operation of the optional apparatus directly below and / or directly above, thereby distributing the management of the entire apparatus. In addition to reducing the processing load on the image processing device or the optional controller, the processing load on the image processing device does not increase rapidly even if the number of connected optional devices changes. The image processing apparatus can be configured without using expensive circuit components that can be processed.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a configuration of an image forming apparatus and an optional apparatus according to an embodiment of the present invention.
FIG. 2 is a block diagram showing an outline of a configuration of an image forming apparatus and an optional device controller according to the embodiment of the present invention.
FIG. 3 is a flowchart illustrating a power-on and connection state setting processing procedure for an image forming apparatus and an optional apparatus according to an embodiment of the present invention.
FIG. 4 is a flowchart illustrating a sheet conveyance process procedure of the image forming apparatus and the optional apparatus according to the first exemplary embodiment of the present invention.
FIG. 5 is a flowchart illustrating a sheet conveyance process procedure of the image forming apparatus and the optional apparatus according to the first exemplary embodiment of the present invention.
FIG. 6 is a flowchart illustrating a sheet conveyance process procedure of the image forming apparatus and the optional apparatus according to the first exemplary embodiment of the present invention.
FIG. 7 is a flowchart illustrating a sheet conveyance process procedure of the image forming apparatus and the optional apparatus according to the first exemplary embodiment of the present invention.
FIG. 8 is a flowchart illustrating a procedure of sheet conveyance processing of an image forming apparatus and an optional apparatus according to a second embodiment of the present invention.
FIG. 9 is a flowchart illustrating a sheet conveyance process procedure of the image forming apparatus and the optional apparatus according to the second exemplary embodiment of the present invention.
FIG. 10 is a flowchart illustrating a sheet conveyance process procedure of an image forming apparatus and an optional apparatus according to a third embodiment of the present invention.
[Explanation of symbols]
100 Image forming apparatus
101 Optional equipment (sheet supply)
102 Optional equipment (sheet supply)
103 Electrophotographic process department
104, 105, 106, 107 sheets
127 Controller in image forming apparatus 100
128 Controller in optional device 101
129 Controller in optional device 102
133 Optional device (sheet discharge)
134 Optional device (sheet discharge)

Claims (8)

What connectable der to any one of the first option device connected to the image forming apparatus or the image forming apparatus, the connected state to the image forming apparatus or the first option device, further, a second optional apparatus Is an optional device of the image forming apparatus that can be connected,
Before Symbol image forming apparatus or the first option device, and a communication unit communicating with the second option device,
From the image forming apparatus or the first option device has, and the option device control means for controlling the operation of the option device based on an instruction received via said communication means,
The optional device control means is configured to monitor the second optional device via the communication means in a state where the image forming apparatus or the first optional device and the second optional device are connected. An image forming apparatus that receives information indicating a state of the second option device from a second option device and controls an operation of the option device based on the received information indicating a state of the second option device. Optional equipment. Further comprising a power control means for performing power-on control for the previous SL second option device,
Said power supply control means, optional Claim 1 image forming apparatus, wherein the instructing the power supply of the option device to power before Symbol before Symbol second option device from being turned after a predetermined time apparatus. The optional device and the second optional device are optional paper feeding devices that supply sheets to the image forming device,
  The option device control means receives information indicating the sheet conveyance state in the second option device from the second option device via the communication means, and controls the operation of the option device based on the received information. The optional apparatus for an image forming apparatus according to claim 1, wherein: Before Kio option device, I sheet discharging option device der for processing sheets discharged from the image forming apparatus,
The option device control means receives information indicating whether or not the sheet can be discharged to the second option device via the communication means from the second option device, and based on the received information, 3. The optional apparatus for an image forming apparatus according to claim 1 , wherein operation of the optional apparatus is controlled . And an image forming apparatus, I straight Sesse' connection possible options device Der to the image forming apparatus, the connected state to the image forming apparatus, further comprising a optional devices connectable to other optional devices An image forming system,
The optional device includes: a first communication unit that communicates with the image forming device and the other optional device; and an operation of the optional device based on an instruction received from the image forming device via the first communication unit. Optional device control means for controlling the optional device for monitoring the other optional device in a state where the image forming apparatus and the other optional device are connected to the optional device. In addition, information indicating the status of the other option device is received from the other option device via the first communication means, and the operation of the option device is performed based on the received information regarding the status of the other option device. Control
The image forming apparatus includes :
Second communication means for communicating with the option device control means of the option device;
Image forming control means for controlling an image forming operation using the optional device;
It said image forming control means for monitoring the state of the option device, the state of the option device via the second communication means from the optional device controller means connected to said optional device to the image forming apparatus The image forming system is configured to control the image forming operation based on the received information indicating the status of the optional device . The image forming apparatus may further have a body power control means for performing power-on control of the option device,
The optional device further have a option unit power control means for performing power-on control of the other optional devices,
The body power supply control unit, since its power is turned on after a predetermined time, instructs the power supply to the option device,
The optional unit power control means, to instruct the electric Minamototo entry Previous Symbol another optional device after introducing its power after a predetermined time in response to the instruction of power-on from the main body power supply control unit The image forming system according to claim 5 . The optional device is an optional paper feeding device that supplies sheets to the image forming apparatus,
  The option device control means receives information indicating sheet conveyance information in the other option device from the other option device via the first communication means, and operates the option device based on the received information. The image forming system according to claim 5, wherein the image forming system is controlled. The optional device is a paper discharge option device that processes a sheet discharged from the image forming apparatus,
  The option device control means receives information indicating whether or not the sheet can be discharged to the other option device from the other option device via the first communication means, and based on the received information. 7. The image forming system according to claim 5, wherein operation of the optional device is controlled.

Images