JP2012252313A - Decoloring apparatus and control method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a decoloring apparatus capable of suppressing a touch on a decoloring section by a user at least while the decoloring section is being maintained in a high temperature state, and further to provide a control method of the decoloring apparatus.SOLUTION: A decoloring apparatus of an embodiment comprises: a conveying member for conveying sheets on which images are formed with a decolorable coloring material; a decoloring section for decoloring the images formed on the sheets conveyed by the conveying member; an opening/closing mechanism for opening and closing the decoloring section; a notifying section that issues a message for alerting a user to an opening of the decoloring section by the opening/closing mechanism; and a control section for causing the notifying section to notify the user of the message for alerting the user to the opening in a case where decoloring processing by the decoloring section is stopped.

Description

  Embodiments described herein relate generally to an erasing apparatus for erasing the color of an image formed on a sheet and a method for controlling the erasing apparatus.

  There is a decoloring device that erases the color of an image from an image-formed sheet. In this erasing apparatus, a sheet on which an image is formed with an erasable color material is subjected to heat treatment to erase the color of the image (color material) on the sheet. In addition, the erasing apparatus determines whether or not erasing processing is possible for a sheet to be erased and whether the erasing processing is successful.

JP 2010-113337 A

  The erasing unit of the erasing apparatus erases the color of the image on the sheet by heating the conveyed sheet. The decoloring part is at a high temperature during the decoloring process or for a while after the decoloring process. Therefore, it is preferable that the user can be prevented from coming into contact with the decolored part at least while the decolored part is in a high temperature state.

  A problem to be solved by the present invention is to provide a decoloring apparatus and a decoloring apparatus control method capable of suppressing a user from contacting the decoloring part at least while the decoloring part is in a high temperature state. That is.

  In order to achieve the above object, an erasing apparatus according to an embodiment erases an image formed on a sheet conveyed by a conveying member that conveys a sheet on which an image is formed with an erasable color material. When the color erasing unit, the opening / closing mechanism for opening / closing the color erasing unit, the notification unit for issuing a message for noting the opening of the color erasing unit by the opening / closing mechanism, and the color erasing process by the color erasing unit are stopped And a control unit that informs the notification unit of a message that warns of opening.

Schematic explaining the structure of a decoloring apparatus. The block diagram explaining the hardware constitutions of a decoloring apparatus. Schematic which shows the state which the opening-and-closing cover of the erasing apparatus closed. Schematic which shows the state which the open / close cover of the decoloring apparatus opened. 3 is a flowchart for explaining processing of the decoloring apparatus according to the first embodiment. Schematic for demonstrating an alerting | reporting part. Schematic for demonstrating the light emission part as a alerting | reporting part. Schematic for demonstrating the state which the light emission part as a alerting | reporting part lighted. The flowchart explaining the process of the decoloring apparatus of 2nd Embodiment Schematic for demonstrating an alerting | reporting part.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a schematic diagram illustrating the configuration of the erasing apparatus. The decoloring apparatus 100 applies a decolorizable color material (hereinafter simply referred to as a recording material) to a sheet on which an image is formed with a “decolorable color material” such as decolorable toner or decolorable ink. The “decoloring process” is performed to erase the color of the image. The erasing apparatus 100 includes a paper feeding tray 102, a paper feeding member 104, a reading unit 106, a erasing unit 108, a first tray 110, a second tray 112, discharge members 114 and 116, a conveyance path 118, and an operation unit 124. Prepare.

  The paper feed tray 102 stacks sheets for reuse. The sheet feed tray 102 stacks sheets of various sizes such as A4, A3, and B5. The sheets stacked on the sheet feeding tray 102 are, for example, sheets formed with an image of a recording material that is erased by heating to a predetermined temperature or higher. The sheet feeding member 104 includes a pickup roller, a sheet supply roller, a separation roller, and the like, and supplies the sheets on the sheet feeding tray 102 one by one to the conveyance path 118 inside the erasing apparatus 100. The paper feed tray 102 has a detection sensor 103 that detects the presence or absence of a sheet on the paper feed tray 102. The detection sensor 103 may be, for example, a microsensor or a microactuator.

  The reading unit 106 includes, for example, a reading unit such as a CCD (Charge Coupled Device) scanner or a CMOS sensor. In the present embodiment, the reading unit 106 reads the images on the first surface and the second surface of the sheet conveyed by the conveying roller pair 120. In other words, the reading unit 106 includes two reading units arranged along the conveyance path 118, and enables double-sided reading of an image of a conveyed sheet. The image read by the reading unit 106 is stored in the storage unit 210 described later. For example, when the image on the sheet read by the reading unit 106 before the color erasing process is digitized and stored in the storage unit, the image data that has been erased later is needed. Can be acquired. Further, the control unit 200 described later determines whether the sheet is erasable or reusable based on the image read by the reading unit 106.

  The erasing unit 108 erases the color of the conveyed sheet image. For example, the decoloring unit 108 decolorizes the color of the image formed on the sheet by the recording material by heating the sheet to a predetermined decoloring temperature in a state where it is in contact with the conveyed sheet. For example, the erasing unit 108 of the erasing apparatus 100 according to the present embodiment includes two erasing units 108a and 108b for the first surface erasing and the second surface erasing of the sheet. The decoloring units 108a and 108b are arranged opposite to each other with the conveyance path 118 interposed therebetween. The erasing unit 108a contacts and heats the sheet from one side of the sheet. The decoloring unit 108b contacts and heats the sheet from the other surface side of the sheet. In other words, the erasing unit 108 erases the images on both sides of the conveyed sheet with a single conveyance. The decoloring unit 108 includes temperature sensors 109a and 109b that detect the temperatures of the heating units of the decoloring units 108a and 108b. The temperature sensors 109a and 109b may be contact type or non-contact type.

  The conveyance path 118 conveys the sheet to the reading unit 106, the erasing unit 108, the first tray 110, and the second tray 112. The erasing apparatus 100 includes a plurality of conveyance roller pairs 120 and a plurality of known branch members 122 on a conveyance path 118. The conveyance roller pair 120 is constituted by a pair of a driving roller and a driven roller, for example. The branch member 122 switches the transport direction of the transported sheet at each branch point on the transport path 118. For example, the erasing apparatus 100 can transport the sheet supplied from the sheet feeding member 104 in the order of the reading unit 106, the erasing unit 108, and the reading unit 106 by controlling the branching member 122. In addition, the conveyance path 118 includes a plurality of detection sensors 123 that detect a conveyed sheet. The detection sensor 123 may be, for example, a microsensor or a microactuator. In FIG. 1, the detection sensor 123 in the vicinity of the decoloring unit 106 is illustrated as an example, but the detection sensor 123 may be disposed at an appropriate position on the conveyance path 118.

  The operation unit 124 disposed on the upper part of the main body of the erasing apparatus 100 has a touch panel display unit 126 and various operation keys. The operation keys include, for example, a numeric keypad, a stop key, and a start key. The user instructs a functional operation of the erasing apparatus 100 such as start of erasing or reading of an image of a sheet to be erased via the operation unit 124. The display unit 126 displays setting information, operation status, log information of the erasing apparatus 100, or a message to the user described later.

  The discharge members 114 and 116 discharge the sheet to the first tray 110 and the second tray 112 that are arranged above and below the main body. For example, the first tray 110 stacks sheets that have been erased and can be reused. The second tray 112 stacks sheets that are determined not to be reused. Hereinafter, the first tray 110 is referred to as a reuse tray, and the second tray 112 is referred to as a reject tray. In the reuse tray 110 and the reject tray 112, sheets to be accepted can be exchanged. The setting of what sheets are stacked on each tray, that is, the setting of the sheet conveyance destination may be set from the operation unit 124, for example.

  The sheet conveyance path is appropriately changed based on the processing mode executed by the erasing apparatus 100. The erasing apparatus 100 has a plurality of processing modes. The erasing apparatus 100 performs, for example, a first erasing mode in which only image erasing processing is performed without performing image reading, a second erasing mode in which erasing processing is performed after image reading, and reading processing before erasing. First, after the color erasing process, a third color erasing mode for performing classification of whether or not the paper P can be reused. After image reading, a color erasing process is performed, and further, a fourth color erasing mode for performing the classification process, and image erasing. There is a reading mode for performing image reading processing without performing color. Each mode described above can be selected by the operation unit 124 of the erasing apparatus 100. The selection of each processing mode is not limited to the operation unit 124 of the erasing apparatus 100, and may be set from an external user terminal. In the first to fourth erasing modes, the sheet is always conveyed to the erasing unit 108. On the other hand, in the reading mode, an appropriate branch member 122 is controlled, and the sheet is discharged via the reading unit 106 without being conveyed to the erasing unit 108.

  FIG. 2 is a block diagram illustrating a hardware configuration of the erasing apparatus. The decoloring apparatus 100 includes a control unit 200, a storage unit 210, a detection unit 212, a communication interface (communication I / F) 214, a reading unit 106, a decoloring unit 108, and an operation unit 124. .

  The control unit (controller) 200 includes a processor 202 including a CPU (Central Processing Unit) or an MPU (Micro Processing Unit), and a memory 204. The control unit 200 controls the reading unit 106, the decoloring unit 108, and the operation unit 124. The memory 204 is, for example, a semiconductor memory, and includes a ROM (Read Only Memory) 206 that stores various control programs, and a RAM (Random Access Memory) 208 that provides a temporary work area for the processor 202. For example, the ROM 206 stores a sheet printing rate as a threshold value for whether or not reuse is possible, a density threshold value for determining whether or not an image has been erased, and the like. The RAM 208 may temporarily store the image read by the reading unit 106. Each component of the erasing apparatus 100 is connected via a bus 216.

  For example, the control unit 200 controls the reading unit 106, the erasing unit 108, and other configurations according to the processing mode set by the operation unit 124. For example, when the first to fourth erasing modes are selected, the control unit 200 causes the erasing unit 108 to erase the sheet image. When the reading unit 106 reads a sheet before the sheet is conveyed to the erasing unit 108 (second erasing mode, fourth erasing mode), the control unit 200 reads an image read by the reading unit 106. Save to the storage unit 210. Here, the control unit 200 may determine whether the sheet image data read by the reading unit 106 includes prohibited data that should be prohibited from being decolored, such as confidential data. Further, when the reading unit 106 reads the image of the decolored sheet after the decoloring unit 108 erases the image of the sheet (the third decoloring mode and the fourth decoloring mode) ) Based on the image data read by the reading unit 106, it is determined whether or not the sheet can be reused from the state of the sheet remaining unerased. The control unit 200 determines a sheet conveyance destination based on the determination result. When a reading mode for reading an image is set without performing image erasing, the control unit 200 controls each branch member 122 to read the sheet without passing through the erasing unit 108. The image read by the reading unit 106 is stored in the storage unit 210.

  The control unit 200 controls each component inside the apparatus based on the signal from the detection unit 212. The detection unit 212 includes the detection sensor 103, the temperature sensors 109a and 109b, the detection sensor 123 shown in FIG. 1, the cover open / close detection sensor 304 shown in FIG.

  The control unit 200 determines the presence / absence of a sheet on the paper feed tray 102 based on a signal from the detection sensor 103. The control unit 200 detects the temperature of the heating unit of the decoloring units 108a and 108b using the temperature sensors 109a and 109b, and controls the temperature of the heating unit of the decoloring units 108a and 108b. Further, the control unit 200 uses the detection sensor 123 to grasp the position of the sheet in the conveyance path 118. For example, the control unit 200 detects a sheet that has passed through the decoloring unit 108 using the detection sensor 123 near the decoloring unit 108. The cover open / close detection sensor 304 will be described later.

  The storage unit 210 stores application programs and an OS. The application program includes a program that executes functions of the erasing apparatus such as a reading function by the reading unit 106 and a erasing function of the erasing unit. The application program further includes an application for a Web client (Web browser) and other applications. The storage unit 210 stores the image read by the reading unit 106. The storage unit 210 stores the number of sheets processed by the erasing apparatus 100. The storage unit 210 may be, for example, a hard disk drive or other magnetic storage device, an optical storage device, a semiconductor storage device such as a flash memory, or any combination thereof.

  The communication I / F 214 is an interface connected to an external device. The communication I / F 214 communicates with an external device on the network via an appropriate wireless or wired connection such as IEEE 802.15, IEEE 802.11, IEEE 802.3, IEEE 3304, such as Bluetooth (registered trademark), infrared connection, or optical connection. To do. The communication I / F 214 may further include a USB connection unit to which a USB standard connection terminal is connected, a parallel interface, and the like. The control unit 200 communicates with the multifunction peripheral and other external devices via the communication I / F 214. For example, the image read by the reading unit 106 is stored in the storage unit 210 of the erasing apparatus 100. However, the present invention is not limited to this. For example, it is possible to communicate with a user terminal (Personal Computer), a multifunction device, or a server, which is an external device, via the communication I / F 214, and store it in a storage unit of these external devices. The image data stored in the external device may be read from the operation unit of the multifunction peripheral or the user terminal. Further, when the erasing apparatus 100 has a login / logout function for personal authentication of the user, the image stored in the RAM 208 or the storage unit 210 of the erasing apparatus 100 when the erasing apparatus 100 logs out. Data may be transmitted to an external device and stored.

  FIG. 3 is a schematic external view for explaining an opening / closing mechanism for opening / closing the erasing unit 108 of the erasing apparatus 100. FIG. 3A shows a state in which the opening / closing cover 300 is closed. FIG. 3B shows a state in which the opening / closing cover 300 is opened.

  The decoloring apparatus 100 includes an open / close cover 300 and a cover open switch 302 as an open / close mechanism. When the cover opening switch 302 shown in FIG. 3A is pressed, the opening / closing cover 300 is opened as shown in FIG. A cover open / close detection sensor 304 is provided on the main body side of the erasing apparatus 100. The cover open / close detection sensor 304 detects whether the open / close cover 300 is open or closed. The cover open / close detection sensor 304 may be, for example, a microsensor or a microactuator. A color erasing unit 108 a that is one of the color erasing units is attached to the opening / closing cover 300. In addition, one of the upstream and downstream conveying roller pairs 120 of the erasing unit 100 is attached to the opening / closing cover 300. The decoloring apparatus 100 opens the space (conveyance path) between the decoloring units 108 a and 108 b of the decoloring unit 108 by opening and closing the opening / closing cover 300 around the rotation shaft 306. Therefore, the user can easily clean a dirty portion of the opened decoloring portion 108 and remove a sheet stopped near the decoloring portion 108. The decoloring unit 108a is not limited to the one attached to the opening / closing cover 300. For example, the open / close cover 300 and the decoloring unit 108a are configured to open and close as separate members, and after the open / close cover 300 is opened, the decoloring unit 108a is rotated to provide a space between the decoloring units 108a and 108b. May be opened.

  Incidentally, the erasing units 108a and 108b of the erasing unit 108 are at a high temperature during the erasing process or for a while after the erasing process. Therefore, it is preferable that the user can be prevented from coming into contact with the decolored part at least while the decolored part is in a high temperature state. The erasing apparatus 100 according to the present embodiment determines whether or not the erasing process by the erasing unit 108 is stopped, and prevents the erasing unit from being opened when the erasing process is stopped, that is, to the user. A message for calling attention is notified from the display unit 126.

  FIG. 4 is a flowchart for explaining processing of the decoloring apparatus 100 according to the present embodiment. When one of the processing modes described above is selected from the operation unit 124 and the start of the erasing process is instructed, the control unit 200 of the erasing apparatus 100 feeds one sheet from the sheet feeding tray 102 and erases it. It is conveyed to the color unit 108. The control unit 200 erases the sheet image by the decoloring unit 108 (ACT 401). In ACT 402, the control unit 200 determines whether the decoloring process by the decoloring unit 108 is stopped. Here, “stop erasing process” means that when the erasing unit 108 stops after the erasing process on the sheet is finished, a paper jam occurs at some point in the conveyance path 118 during the erasing process. Includes the case where the decoloring unit 108 stops.

  When the decoloring process is stopped (Yes in ACT 402), the control unit 200 informs the notification unit of a message for preventing the decoloring unit 108 from being opened (ACT 403). For example, the control unit 200 displays a message screen 500 for preventing the opening on the display unit 126 as shown in FIG. Note that the notification unit is not limited to the display unit 126 of the decoloring unit 100. For example, screen data to be displayed on a display unit of an external user terminal or a message may be transmitted via the external I / F 214. Alternatively, the decoloring apparatus 100 may have a configuration having a light emitting unit 600 as a notification unit as shown in FIG. The light emitting unit 600 is a light source body such as an LED. When the decoloring process is stopped, the control unit 200 causes the light emitting unit 600 to emit light as illustrated in FIG. Alternatively, the notification unit may be configured to notify the user by voice. Thereby, the user can wait for the act of opening the decoloring unit 108 for a while, or can open it with care even when opening.

  The control unit 200 determines in ACT 404 whether or not it is a predetermined timing. If the control unit 200 determines that it is a predetermined timing (ACT 404: Yes), the control unit 200 ends the message notification by the notification unit (ACT 405). For example, the control unit 200 erases the message screen 500 for preventing the opening shown in FIG. When the notification unit is the light emitting unit 600 as illustrated in FIG. 6, the control unit 200 stops the light emission of the light emitting unit 600. When the control unit 200 determines that the predetermined timing has not been reached (No in ACT 404), the control unit 200 continues to notify the message by the notification unit. That is, here, the predetermined timing is when the erasing unit 108 stops and the temperature of the erasing unit 108 falls below a value that does not cause a problem even if the user touches it.

  The control unit 200 determines whether or not it is a predetermined timing based on at least one of the temperature of the decoloring unit 108 and the elapsed time after the decoloring process is stopped. When based on the temperature of the decoloring unit 108, the control unit 200 measures the temperature of the decoloring unit 108 via the temperature sensor 109, and the temperature of the decoloring unit 108 is equal to or lower than a predetermined temperature set in advance. Until the message is announced. The memory 204 or the storage unit 210 stores the predetermined temperature. The predetermined temperature may be uniquely determined by the design by the manufacturer or may be set by the user. On the other hand, when based on the elapsed time after the decoloring process is stopped, the control unit 200 measures the time elapsed after the decoloring process is stopped until the measured time reaches a predetermined time set in advance. , Let the message be announced. The memory 204 or the storage unit 210 stores the predetermined time. The predetermined time may be uniquely determined by the design by the manufacturer, or may be set by the user. Thereby, the decoloring apparatus 100 can call attention to the user until the temperature of the decoloring unit 108 is sufficiently lowered.

  According to the above-described embodiment, the decoloring apparatus 100 can prevent the user from inadvertently contacting the decoloring unit 108 at least while the decoloring unit is in a high temperature state.

(Second Embodiment)
In the first embodiment, when the decoloring process is stopped, a message for alerting the user is notified. However, in the second embodiment, the control unit 200 needs to open the decoloring unit 108. In some cases, the notifying unit notifies the user of a message that requires attention, and when there is no need to open the decoloring unit 108, it notifies that the decoloring unit 108 does not need to be opened. In the following, the same reference numerals are given to the same portions as the respective portions of the decoloring apparatus of the above-described embodiment, and the characteristic portions of the present embodiment will be described.

  FIG. 7 is a flowchart for explaining processing of the erasing apparatus 100 according to the present embodiment. When one of the processing modes described above is selected from the operation unit 124 and the start of the erasing process is instructed, the control unit 200 of the erasing apparatus 100 feeds one sheet from the sheet feeding tray 102 and erases it. It is conveyed to the color unit 108. The control unit 200 erases the sheet image by the decoloring unit 108 (ACT 701). Subsequently, the control unit 200 determines whether or not the decoloring process is stopped.

  The control unit 200 determines whether a paper jam has occurred in the conveyance path 118 during the decoloring process (ACT 702). If a paper jam has not occurred (No in ACT 702), the control unit 200 determines whether the color erasing process on the sheet has been completed (ACT 703). When the color erasing process on the sheet is not completed (No in ACT 703), the sheet continues the color erasing process.

  On the other hand, when the decoloring process is stopped due to the occurrence of a paper jam (ACT 702: Yes), the control unit 200 determines the position of the sheet based on the signal from the detection sensor 123 in the conveyance path 118 (ACT 704). . The control unit 200 determines whether it is necessary to open the decoloring unit 108 in order to remove the sheet from the detected position of the sheet (ACT 705). If it is determined that the decoloring unit 108 needs to be opened (ACT 705: Yes), the control unit 200 displays a message screen 500 for preventing the display unit 126 from being opened, for example, as shown in FIG. Display (ACT 706). On the other hand, when it is determined that it is not necessary to open the decoloring unit 108 (No in ACT 705), the control unit 200 needs to open the decoloring unit 108 to the display unit 126 as shown in FIG. A message screen 800 indicating that there is no message is displayed (ACT 707). As a result, the erasing apparatus 100 can alert the user when a jam occurs and the erasing unit 108 needs to be opened, and the erasing unit 108 is not necessary. You can avoid the situation of opening up.

  Further, in ACT 703, when the decoloring process is stopped by ending the decoloring process for all sheets, the control unit 200 causes the light emitting unit 600 shown in FIG. 6B to emit light (ACT 708). . When the screen as shown in FIG. 5 or FIG. 8 is displayed every time the normal erasing process is finished, the user may feel annoying. Therefore, when the erasing unit stops when the erasing process on the sheet ends, the erasing apparatus 100 can reduce the troublesomeness for the user by causing the light emitting unit 600 that is a light emitter to emit light. I can do it. Further, the erasing apparatus 100 indicates that the erasing unit 108 is hot by illuminating the light emitting unit 600. Thereby, the decoloring apparatus 100 also has an effect of prompting the user's attention.

  In ACT 709 and ACT 710, the control unit 200 performs the same processing as in ACT 404 and ACT 405 shown in FIG.

    According to the embodiment described above, the same effects as those of the first embodiment can be obtained, and the user's attention can be more appropriately urged.

  In ACT 708, instead of making the light emitting unit 600 shine, it may be displayed that the message screen 800 shown in FIG.

  Further, the color erasing apparatus 100 according to the present embodiment is limited to a configuration in which a screen as shown in FIG. 5 or FIG. 8 is not necessarily displayed on the display unit 126 when an abnormal termination such as a jam occurs (Yes in ACT 702). Not. The erasing apparatus 100 may alert the user by controlling the lighting mode of the light emitting unit 600 when an abnormal end such as a jam occurs. For example, when it is necessary to open the erasing unit 108 from the position of the sheet (ACT 706), the control unit 200 causes the light emitting unit 600 to blink and the erasing unit 108 does not need to be opened (ACT 707). In the case of normal termination (ACT 708), the control unit 200 may turn on the light emitting unit 600 at all times. Further, the lighting modes in ACTs 706, 707, and 708 may all be different. Alternatively, the erasing apparatus 100 may be configured to change the color of light to be turned on.

  Note that the entity that executes each operation of the above-described embodiment is an entity relating to a computer, such as hardware, a complex of hardware and software, software, software being executed, and the like. For example, the subject that performs the operation is a process, processor, object, executable file, thread, program, and computer executed on the processor, but is not limited thereto. In addition, a process or thread may perform a plurality of subjects that perform an operation.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 100 Decoloring apparatus 106 Reading part 108 Decoloring part 108a, 108b Decoloring unit 109 Temperature sensor 118 Conveyance path 120 Conveyance roller 103,123 Detection sensor 124 Operation part 126 Display part 200 Control part 204 Memory 212 Detection part 300 Opening / closing cover 302 Cover Open switch
600 Light emitting part

Claims (7)

A conveying member that conveys a sheet on which an image is formed with an erasable color material;
A decoloring part for decoloring an image formed on a sheet conveyed by the conveying member;
An opening and closing mechanism for opening and closing the decoloring part;
An informing unit for issuing a message to note the opening of the decoloring unit by the opening and closing mechanism;
When the erasing process by the erasing unit is stopped, a control unit that informs the notification unit of a message to be careful about the opening;
A decoloring device comprising:   The erasing apparatus according to claim 1, wherein the notification unit includes at least one of a light emitting unit that emits light as the notification of the message or a display unit that displays a message screen as the notification of the message. . Having at least one sheet sensor for detecting a conveyed sheet;
The notification unit includes the display unit,
When the paper jam occurs, the control unit determines the position of the sheet based on a signal from the sheet sensor and needs to open the decoloring unit by the opening / closing mechanism in order to remove the sheet. 3. The erasing apparatus according to claim 2, wherein in some cases, a message screen for noting the opening of the erasing unit is displayed on the display unit.   The control unit opens the decoloring unit on the display unit when it is not necessary to open the decoloring unit by the opening / closing mechanism in order to remove the sheet when a paper jam occurs. 4. The erasing apparatus according to claim 3, wherein a message screen indicating that it is not necessary is displayed. The notification unit includes the light emitting unit,
The erasing apparatus according to claim 2, wherein the control unit causes the light emitting unit to emit light when the erasing process is completed and the erasing unit is stopped.   The control unit waits for a predetermined time after the erasing process by the erasing unit is stopped, until the temperature of the erasing unit becomes a predetermined temperature or lower, or after the erasing process by the erasing unit is stopped. The erasing apparatus according to any one of claims 1 to 5, wherein the message is notified until the time elapses. A method for controlling an erasing apparatus comprising an erasing part for erasing an image formed of an erasable color material on a conveyed sheet and an opening / closing mechanism for opening and closing the erasing part,
Determine whether the erasing process by the erasing unit has stopped,
A method for controlling a decoloring apparatus, wherein when the decoloring process by the decoloring unit is stopped, a message for noting the opening of the decoloring unit by the opening / closing mechanism is notified.

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