JP2019055858A - Suction device, liquid discharge device, program and suction control method - Google Patents

Abstract

To suppress occurrence of a plurality of kinds of abnormal states to an object to be conveyed in a conveying route.SOLUTION: A suction device comprises: suction means which sucks a sheet-like object to be conveyed with a predetermined suction force when conveying the object to be conveyed; detection means for detecting an abnormal state occurring in the object to be conveyed on a conveying route of the object to be conveyed; and suction control means for controlling the suction force of the suction means according to a kind of the abnormal state detected by the detection means.SELECTED DRAWING: Figure 6

Description

  The present invention relates to an adsorption device, a liquid ejection device, a program, and an adsorption control method.

  2. Description of the Related Art Conventionally, as a method for preventing a sheet-like object being conveyed from floating, it is known to provide an adsorption unit that adsorbs an object to be conveyed.

  Patent Document 1 describes a technique for controlling the suction force of the suction means in accordance with humidity as a method for suppressing the lift of the conveyed object.

  However, according to the conventional suction control technology for the object to be transported, the suction force is increased according to the curl of the object to be transported, so that carriage jam can be suppressed. Jam may occur. That is, according to the conventional conveyance control of the object to be conveyed, there is a problem in that it cannot cope with suppressing the occurrence of a plurality of types of abnormal states with respect to the object to be conveyed on the conveyance path.

  The present invention has been made in view of the above, and provides a suction device, a liquid discharge device, a program, and a suction control method capable of suppressing the occurrence of a plurality of types of abnormal states on a transported object on a transport path. The purpose is to provide.

  In order to solve the above-described problems and achieve the object, the present invention provides a suction means for sucking the transported object with a predetermined suction force when transporting the sheet-shaped transported object, and transporting the transported object. Detection means for detecting an abnormal state occurring in the object to be conveyed on the path; and an adsorption control means for controlling the adsorption force of the adsorption means according to the type of the abnormal state detected by the detection means. It is characterized by providing.

  According to the present invention, there is an effect that it is possible to suppress occurrence of a plurality of types of abnormal states with respect to an object to be transported on a transport path.

FIG. 1 is a diagram illustrating an example of the ink jet recording apparatus according to the first embodiment. FIG. 2 is a diagram schematically illustrating the suction conveyance unit. FIG. 3 is a block diagram showing the electrical connection of the control system of the ink jet recording apparatus. FIG. 4 is a functional block diagram illustrating functions of the main control unit of the ink jet recording apparatus. FIG. 5 is a diagram illustrating an example of a table. FIG. 6 is a flowchart showing the flow of the suction control process executed by the main control unit of the inkjet recording apparatus. FIG. 7 is a diagram illustrating an example of a table according to the second embodiment. FIG. 8 is a diagram illustrating another example of the table. FIG. 9 is a flowchart illustrating the flow of the suction control process executed by the main control unit of the ink jet recording apparatus according to the third embodiment.

  Hereinafter, embodiments of a suction device, a liquid ejection device, a program, and a suction control method will be described in detail with reference to the accompanying drawings. Hereinafter, a case where the adsorption device is applied to an ink jet recording apparatus that is a liquid ejection apparatus that ejects liquid will be described as an example, but the present invention is not limited thereto.

(First embodiment)
[Description of Hardware Configuration of Inkjet Recording Apparatus]
FIG. 1 is a diagram illustrating an example of an ink jet recording apparatus 100 according to the first embodiment. As shown in FIG. 1, the ink jet recording apparatus 100 includes a recording apparatus main body 101 and a support base 102. The ink jet recording apparatus 100 includes guide rods 103 and guide rails 104 on both side plates (not shown) inside the recording apparatus main body 101. The guide rod 103 and the guide rail 104 hold the carriage 105 so as to be slidable in the arrow A direction. The ink jet recording apparatus 100 includes ink cartridges 108 and 109.

  The carriage 105 is mounted with a recording head 221 (see FIG. 2) having a liquid ejection head that ejects ink droplets of the respective colors supplied from the ink cartridges 108 and 109. Each recording head 221 is integrally provided with a sub tank (not shown) that stores ink supplied from the ink cartridges 108 and 109. In this embodiment, the carriage 105 including the recording head 221 is used as the liquid ejecting unit.

  The main scanning mechanism that moves and scans the carriage 105 is disposed on one side in the main scanning direction, a driving pulley 112 that is rotationally driven by the main scanning motor 111, and the other side in the main scanning direction. A driven pulley 113 and a belt member 114 wound between the driving pulley 112 and the driven pulley 113 are provided. The driven pulley 113 is tensioned outward (in a direction away from the drive pulley 112) by a tension spring (not shown).

  The belt member 114 pulls the carriage 105 in the main scanning direction by being partly fixed and held by a belt fixing portion provided on the back side of the carriage 105. Among the main scanning areas in the carriage 105, in the recording area, the sheet 110, which is a sheet-like transported object whose end is inserted into the paper feed port 106, is orthogonal to the main scanning direction of the carriage 105 by the suction conveyance section 107. Is intermittently conveyed in the direction B (sub-scanning direction / paper conveying direction) B. In the present embodiment, roll paper (paper 110) is applied as a sheet-like conveyed object.

  The ink jet recording apparatus 100 includes a transport sensor 115 that detects that the paper 110 is transported at a position where the paper 110 always passes after printing regardless of the width.

  Next, the suction conveyance unit 107 serving as a suction unit will be described.

  FIG. 2 is a diagram schematically showing the suction conveyance unit 107. As described above, the carriage 105 is moved and scanned in the direction A orthogonal to the paper transport direction B. The carriage 105 has a recording head 221 having a liquid ejection head for ejecting ink droplets, an encoder sensor 322 (see FIG. 3) that detects the position of the carriage 105 in the main scanning direction, and detects the leading edge position and the widthwise both edge positions of the paper 110. A sheet sensor 323 (see FIG. 3) is mounted as a sheet detecting means including an optical sensor for performing the above.

  The encoder sensor 322 reads an encoder sheet 322A (see FIG. 3) arranged along the main scanning direction of the carriage 105, and detects the position of the carriage 105 in the main scanning direction.

  The paper sensor 323 may be, for example, an optical sensor having an irradiating unit that irradiates light to an object and a light receiving unit that receives reflected light from the object. Note that the paper sensor 323 may have a function of detecting the paper type and paper thickness of the paper 110. In addition, the carriage 105 may include a touch sensor that detects that the sheet 110 has come into contact with the carriage 105.

  As illustrated in FIG. 2, the suction conveyance unit 107 includes a conveyance unit 209 including a registration roller 201 and a registration pressure roller 202 that convey a sheet 110 having an end inserted into the sheet feeding port 106. . The suction conveyance unit 107 includes a platen member 204, air chambers 206 arranged on the back surface of the platen member 204 and arranged in the paper width direction, and a suction fan 208 connected to the suction port 207 of the air chamber 206. I have. The air chamber 206 is formed by an air chamber forming member 206A.

  The platen member 204 guides the sheet 110 conveyed by the registration roller 201 and the registration pressure roller 202 below the carriage 105. The platen member 204 includes a plurality of suction holes 205 arranged in the paper width direction.

  With such a configuration, the suction conveyance unit 107 sucks the paper 110 onto the platen member 204 during image formation, and suppresses the paper 110 from floating from the platen member 204 during image formation. Further, the suction conveyance unit 107 can change the suction force according to the number of rotations of the suction fan 208, the number of suction holes 205 provided in the platen member 204, the size of the diameter, and the like.

  Next, the control system of the inkjet recording apparatus 100 will be described.

  FIG. 3 is a block diagram showing the electrical connection of the control system of the inkjet recording apparatus 100. As shown in FIG. 3, the ink jet recording apparatus 100 includes a control device 300 that is a main control body of each unit. The control device 300 includes a main control unit 301 that is a control unit, a head drive control unit 302, a drive waveform storage unit 306, a motor drive circuit 307, and a fan drive circuit 308.

  The main control unit 301 includes a central processing unit (CPU) that controls the entire inkjet recording apparatus 100, a read only memory (ROM), a random access memory (RAM), an interface (I / F), a timer, and the like. Includes a microcomputer.

  The ROM of the main control unit 301 stores various programs executed by the CPU and various data. The RAM of the main control unit 301 temporarily stores data and programs when the CPU executes various programs. The CPU of the main control unit 301 comprehensively controls each unit of the inkjet recording apparatus 100 by reading the program stored in the ROM into the RAM and executing it.

  The program executed by the inkjet recording apparatus 100 of the present embodiment is a file in an installable or executable format, such as a CD-ROM, a flexible disk (FD), a CD-R, a DVD (Digital Versatile Disk), or the like. You may comprise so that it may record and provide on a computer-readable recording medium.

  Furthermore, the program executed by the ink jet recording apparatus 100 of the present embodiment may be provided by being stored on a computer connected to a network such as the Internet and downloaded via the network. Further, the program executed by the inkjet recording apparatus 100 of the present embodiment may be configured to be provided or distributed via a network such as the Internet.

  The head drive control unit 302 controls the drive of the recording head 221. The drive waveform storage unit 306 stores drive waveform data applied from the head drive control unit 302 to the recording head 221. The motor driving circuit 307 drives a paper feed motor 316 that drives a main scanning motor 111 and a registration roller (conveying roller) 201 for conveying the paper 110. The fan drive circuit 308 drives the suction fan 208.

  The main control unit 301 connects an encoder sensor 324 that detects the sub-scanning direction of the paper 110 in addition to the encoder sensor 322, the paper sensor 323, and the paper discharge sensor 115 of the carriage 105.

  In addition, the main control unit 301 connects a memory 311 formed of a nonvolatile memory such as a flash memory. The main control unit 301 stores the operation time and stop time of each function measured by the timer in the memory 311.

  Further, the main control unit 301 includes a communication circuit 310 that communicates with the outside. The main control unit 301 is communicably connected to the operation unit 314 via the communication circuit 310 and the bus 312.

[Description of functional configuration of inkjet recording apparatus]
Next, functions that are exhibited when the CPU of the main control unit 301 of the inkjet recording apparatus 100 executes a program stored in the ROM will be described. Here, description of conventionally known functions will be omitted, and characteristic functions exhibited by the inkjet recording apparatus 100 of the present embodiment will be described in detail.

  FIG. 4 is a functional block diagram illustrating functions of the main control unit 301 of the inkjet recording apparatus 100.

  As shown in FIG. 4, the main control unit 301 of the inkjet recording apparatus 100 functions as a detection unit 401, an adsorption control unit 402, and a storage unit 403 by executing a program stored in the ROM. The main control unit 301 includes, in addition to the detection unit 401, the suction control unit 402, and the storage unit 403, an image formation control unit that controls image formation on the paper 110, and a conveyance control unit that controls conveyance of the paper 110. Needless to say, these functions may be realized.

  The detection unit 401 receives a signal sent from a sensor that detects the state of the paper, such as the encoder sensor 322, the paper sensor 323, and the paper discharge sensor 115, and thus occurs when the paper 110 floats on the conveyance path. It is detected that an abnormal state with respect to the paper 110 on the transport path such as a jam or a jam that occurs when the paper 110 is not transported correctly in the transport direction B is detected.

  Note that in this embodiment, a jam that occurs when the paper 110 and the carriage 105 or the recording head 221 come into contact with each other when the paper 110 floats from the conveyance path is referred to as a carriage jam. Further, a jam that occurs when the paper 110 is not correctly conveyed in the conveyance direction B is referred to as a paper discharge jam.

  Then, the detection unit 401 outputs a detection result of a carriage jam or a paper discharge jam to the suction control unit 402. For example, the detection unit 401 detects from the signals sent from the encoder sensor 322 and the paper sensor 323 that the position of the carriage 105 has not reached the position that should be reached by the control of the main control unit 301. Carriage jam can be detected. Alternatively, the detection unit 401 measures the time until the conveyance sensor 115 is turned on by a timer provided in the main control unit 301, and can detect that a paper discharge jam has occurred if it exceeds a certain time. . Specifically, the detection unit 401 operates the main scanning motor 111 and the paper feed motor 316 to feed paper, and then the paper discharge sensor 115 is transported to a position where the paper 110 passes in front of the transport sensor 115. It is possible to detect that a paper discharge jam has occurred if the time until a signal indicating this is output is measured and the predetermined time is exceeded.

  Note that when the carriage 105 includes a touch sensor that detects that the paper 110 has come into contact with the carriage 105, the detection unit 401 may detect that a carriage jam has occurred mechanically using the touch sensor. In addition, the detection unit 401 may detect that a carriage jam has occurred when the load applied to the main scanning motor 111 exceeds a certain level. For example, when the value indicating the duty ratio of the PWM signal output from the motor drive circuit 307 to the main scanning motor 111 becomes a certain value or more, it is detected that a carriage jam has occurred.

  The storage unit 403 stores a printing condition when a carriage jam or a paper discharge jam occurs, and the number of times the jam has occurred in a table T1 (see FIG. 5) of the memory 311. Examples of printing conditions include, but are not limited to, the type of roll paper, the thickness of the roll paper, the temperature, the size of the image formed on the roll paper, and the like. Information stored in the table T1 by the storage unit 403 is used when the suction control unit 402 controls the suction force.

  The suction control unit 402 performs correction control of the suction force based on the detection result of the carriage jam or the paper discharge jam sent from the detection unit 401. Hereinafter, “adjusting and controlling the suction force (increasing or weakening the suction force)” is referred to as “suction correction”.

  For example, when the detection unit 401 detects a carriage jam, the suction control unit 402 performs control to increase the suction force, thereby suppressing the sheet 110 from coming into contact with the carriage 105 by floating from the platen member 204.

  Further, for example, when the detection unit 401 detects a paper discharge jam, the suction control unit 402 performs control to weaken the suction force, so that the paper 110 sticks to the platen member 204 and cannot be discharged. Suppress.

  Then, the suction control unit 402 stores information such as the type of jam and printing conditions (information on control of the suction force of the suction conveyance unit 107) and the number of times the jam has occurred in the storage unit 403 in the table T1. Further, the suction control unit 402 stores the value of the suction force after controlling the suction force in the storage unit 403 in the table T1. For example, the adsorption force (%) column (see FIG. 5) of the table T1 may be updated or stored in association with the printing conditions.

  Here, the table T1 of the memory 311 will be described.

  FIG. 5 is a diagram illustrating an example of the table T1. As shown in FIG. 5, the table T1 includes “paper type”, “paper thickness”, “jam type”, “default value (%)”, “cumulative number”, “correction value (%)”, and “adsorption force (%)”. Store in association with each other.

“Paper type” is the type of paper 110 on which printing is performed, and types such as plain paper and tracing paper (Treppe in the figure) are conceivable.
“Paper thickness” is the thickness of the paper 110 on which printing is performed. “Normal” is the standard paper thickness, “thick” is the thicker paper than the standard, and is thinner than the standard paper thickness. The thing is distinguished from "thin".
The “jam type” is the type of jam detected by the detection unit 401. In the table T1, “carriage jam” and “paper discharge jam” are assumed.
"Default value (%)" is the initial value of the suction force, and the suction force is controlled so that it becomes the default suction force when no jam has occurred in the past or when the suction force is not corrected. Is done.
“Cumulative count” is the number of times a jam has occurred. For example, if the cumulative number of carriage jams is “3”, this means that the carriage jam has occurred three times in the past, that is, the detection means 401 has detected the carriage jam three times in the past.
The “correction value (%)” is a control amount used when the suction control unit 402 controls the suction force. The “correction value (%)” may be set in correspondence with the “cumulative number”. For example, when the cumulative number is 0 or more and less than 3, the correction value may be “0”, and when the cumulative number is 3 or more, the correction value may be “cumulative number * 5”.
“Adsorption force (%)” is the adsorption force after the adsorption control unit 402 corrects the adsorption force using the correction value. Here, “%” represents a ratio where the maximum value of the adsorption force is 100%. For example, when I = 30, it means that the sheet 110 is sucked with a force of 30% of the maximum suction force.

  The “paper type” and “paper thickness” may be detected by the paper sensor 323 or may be set by the user from the operation unit 314 provided in the ink jet recording apparatus 100.

  For example, in the table T1 shown in FIG. 5, “paper type: tracing paper (Trepé in the figure)” “paper thickness: thin” “jam type: carriage” “cumulative number: Ii” “default value (%): Information “I”, “correction value (%): cumulative number of times * 5”, and “adsorption force (%): Ii * 5 + I” are stored in association with each other. For example, when I = 30, it means that the sheet 110 is sucked with a force of 30% of the maximum suction force. When the cumulative number (Ii) is 3, the suction force is 3 * 5 + 30 = 45, and the suction control unit 402 controls the suction force so that the suction force is 45%.

  In the present embodiment, as a method for expressing the suction force, a ratio in which the maximum value of the suction force is 100% is used. However, the present invention is not limited to this, and the number of rotations of the suction fan 208 and the platen member 204 are provided. Any value necessary for changing the suction force of the suction conveyance unit 107, such as the number of the suction holes 205 and the size of the diameter, may be used.

  FIG. 6 is a flowchart showing the flow of the suction control process executed by the main control unit 301 of the inkjet recording apparatus 100. The suction control process by the main control unit 301 is performed by sending image data from an information processing apparatus such as a personal computer (PC) or a smartphone operated by a user (user) of the inkjet recording apparatus 100 to the inkjet recording apparatus 100. When image formation is started at 100, the operation starts.

  As shown in FIG. 6, the suction control unit 402 acquires printing conditions (step S1). This printing condition is information that causes jamming such as paper size, paper type, paper thickness, paper width, paper remaining amount, paper tube diameter, temperature, humidity, and the like, and controls the suction force of the suction conveyance unit 107. Used when. These printing conditions may be sent from the information processing apparatus to the ink jet recording apparatus 100 together with the image data, or may be input by the user from the operation unit 314 provided in the ink jet recording apparatus 100.

  Next, the adsorption control unit 402 reads “adsorption force (%)” associated with the printing condition that matches the printing condition acquired in step S1 from the table T1, and performs adsorption control so that the read adsorption force is obtained. (Step S2). Note that if no jamming has occurred in the past under the printing conditions acquired in step S1, the cumulative number of times in the table T1 is 0, so “Suction force (%)” is the default suction force. .

  Next, the suction control unit 402 transports the sheet 110 onto the platen member 204 while performing suction control so that the “suction force (%)” read in step S2 is obtained (step S3). The image formation control unit of the ink jet recording apparatus 100 executes printing on the paper 110 conveyed on the platen member 204.

  Next, the suction control unit 402 determines whether printing has been completed without jamming (step S4). If the detection result is not received from the detection unit 401, the suction control unit 402 determines that the printing has been normally completed (Yes in step S4), and ends the process. On the other hand, when receiving the detection result from the detection unit 401, the suction control unit 402 determines that the printing is not normally completed (No in step S4), and proceeds to step S5. In general, in the ink jet recording apparatus 100, when a jam occurs, printing cannot be performed properly. Therefore, when a jam occurs, the printing is interrupted or terminated.

  Next, the adsorption control unit 402 acquires information at the time of occurrence of the jam (step S5), and proceeds to step S6. The information acquired in step S5 is the printing conditions acquired in step S1 and the type of jam detected by the detection unit 401.

  Next, the suction control unit 402 refers to the table T1, and determines whether or not the same type of jam has occurred in the past under the same printing conditions (step S6). Specifically, the suction control unit 402 reads out the number of jam occurrences (cumulative number) from the table T1 to determine whether or not the same type of jam has occurred in the past under the same printing conditions.

  The suction control unit 402 determines that suction correction is unnecessary when the same jam has not occurred under the same printing conditions in the past, that is, when the cumulative number is “0” (No in step S6). In this case, the storage unit 403 increases the number of occurrences of jam occurrence in the table T1 by 1 (step S7), and ends the process. If the same type of jam has not occurred in the past under the same printing conditions as the currently detected jam, it is possible that the currently detected jam is a sensor misdetection or accidental jam.

  On the other hand, if the same jam has occurred in the past under the same conditions (Yes in step S6), the suction control unit 402 proceeds to step S8.

  Next, the suction control unit 402 refers to the table T1, and determines whether or not the cumulative number is equal to or greater than a predetermined number (N times) (step S8). In other words, in step S8, the suction control unit 402 determines whether suction correction is necessary. For example, when N = 3 and the cumulative number is less than 3, the suction control unit 402 does not perform suction correction. N may be set arbitrarily.

  If the cumulative number is less than the predetermined number (N times) (No in step S8), the suction control unit 402 determines that suction correction is unnecessary. In this case, the storage unit 403 increases the number of occurrences of jam occurrence in the table T1 by 1 (step S9), and ends the process.

  On the other hand, if the cumulative number is equal to or greater than the predetermined number (N times) (Yes in step S8), the suction control unit 402 determines that suction correction is necessary and proceeds to step S10.

  The suction control unit 402 refers to the table T1 and determines whether the cumulative number is less than a predetermined number (M times) (step S10). In other words, in step S10, the suction control unit 402 determines whether the jam can be eliminated by suction correction.

  If the cumulative number of the table T1 is less than M times (Yes in step S10), the suction control unit 402 determines that the jam can be eliminated by performing suction correction, and proceeds to step S11.

  On the other hand, if the accumulated number of times in the table T1 is M or more (No in step S10), the suction control unit 402 determines that the jam cannot be eliminated by the suction correction, and proceeds to step S12.

  In step S12, the suction control unit 402 notifies the user (user) that the jam cannot be eliminated by the suction correction, or that maintenance is necessary, and the process ends. Such notification is performed by displaying a message on the operation unit 314, for example.

  In step S <b> 11, the suction control unit 402 determines whether the currently occurring jam is a paper discharge jam from the information when the jam occurred in step S <b> 5 occurs.

  If it is a paper discharge jam (Yes in step S11), the suction control unit 402 proceeds to step S13 and performs suction correction to weaken the suction force.

  On the other hand, if it is not a paper discharge jam (No in step S11), that is, if it is a carriage jam, the suction control unit 402 proceeds to step S14 and performs suction correction to increase the suction force.

  Next, the storage unit 403 increments the number of occurrences (accumulated number) of jam occurrence corresponding to the printing condition acquired in step S1 and the type of jam acquired in step S5, and stores it in the table T1 (step S15). .

  Finally, the storage unit 403 updates the suction force in the table T1 to the suction force after the suction correction (step S16), and ends the process.

  As described above, according to the present embodiment, the suction force of the suction conveyance unit 107 can be controlled according to the type of jam, and the occurrence of a plurality of types of jams that occur during the next image formation can be suppressed. Can do. Further, considering whether or not the same jam has occurred under the same conditions and using the information on the number of occurrences for the control of the suction force, the occurrence of the jam can be more suitably suppressed.

(Second Embodiment)
Next, a second embodiment will be described.

  The ink jet recording apparatus 100 according to the second embodiment is different from the first embodiment in that the temperature and the transport position are also stored in the table as the cause of the jam. Hereinafter, in the description of the second embodiment, the description of the same parts as those of the first embodiment will be omitted, and different parts from the first embodiment will be described.

  FIG. 7 is a diagram illustrating an example of a table T2 according to the second embodiment. The table T1 of the first embodiment includes “paper type”, “paper thickness”, “jam type”, “default value (%)”, “cumulative number”, “correction value (%)”, and “adsorption force (%)”. Store in association with each other. That is, in the first embodiment, the paper type and the paper thickness are taken into consideration as the cause of the jam. However, the cause of the jam is not limited to the paper type and the paper thickness, and it is preferable to consider the temperature and the transport position as the cause of the jam.

  Therefore, as shown in FIG. 7, the table T2 of the memory 311 according to the second embodiment stores “temperature (° C.)” and “transport position” in association with “paper type” and the like.

“Temperature (° C.)” is a temperature detected by a temperature sensor (not shown) included in the inkjet recording apparatus 100.
“Conveyance position” means which part of the paper 110 is conveyed to the recording area of the inkjet recording apparatus 100. This conveyance position may be detected by the inkjet recording apparatus 100 from the number of rotations of the registration roller 201 and the registration pressure roller 202, or may be detected by the encoder sensor 322, but is not limited thereto.

  When the paper 110 is roll paper, 0 to 20% is “leading edge” and 20 to 80% is “intermediate” when the length from the leading edge to the cutting position (rear edge) for cutting the rolled paper is 100%. "80-100% can be defined as" rear end ", but is not limited thereto. For example, when the distance from the front end to the rear end is 1000 mm, 0 to 300 mm is “front end”, 300 to 700 mm is “intermediate”, 700 to 1000 mm is “rear end”, and from the front end to the rear end. It may be set corresponding to the length, but is not limited thereto.

  For example, when the leading end of the roll paper is conveyed to the recording area when the temperature is 0 to 10 ° C., the suction control unit 402 controls the suction force so that the suction force becomes I * 5 + A ′% of the maximum suction force. To do. Further, when the middle of the roll paper is conveyed to the recording area when the temperature is 0 to 10 ° C., the suction control unit 402 controls the suction force so that the suction force becomes I * 5 + B ′% of the maximum suction force. To do. When the trailing edge of the roll paper is conveyed to the recording area when the temperature is 0 to 10 ° C., the suction control unit 402 controls the suction force so that the suction force becomes I * 5 + C ′% of the maximum suction force. To do.

  For example, in the table T2 shown in FIG. 7, “paper type: trepe” “paper thickness: thin” “temperature: 0 to 10” “conveying position: leading edge” “jam type: carriage” “cumulative number: I” “default” Information of “value (%): A ′”, “correction value (%): I * 5”, and “adsorption force (%): I * 5 + A ′” is stored in association with each other. For example, when A ′ = 30, it means that the sheet 110 is sucked with a force of 30% of the maximum suction force. When the cumulative number (I) is 3, the suction force is 3 * 5 + 30 = 45, and the suction control unit 402 controls the suction force so that the suction force is 45%.

  The table T2 shown in FIG. 7 shows only the case where the jam type is a carriage jam, but the same applies to the case where the jam type is a paper discharge jam.

  FIG. 8 is a diagram illustrating another example of the table T2 according to the second embodiment. In the table T2 shown in FIG. 8, the cumulative number of jams is associated with each transport position. As a result, the suction correction can be performed for each transport position, and the occurrence of jam can be more effectively suppressed.

  Thus, according to the present embodiment, it is possible to more effectively suppress the occurrence of jam.

(Third embodiment)
Next, a third embodiment will be described.

  The ink jet recording apparatus 100 of the third embodiment is that the suction correction is performed using the result of comparing the type of jam detected this time and the type of jam detected last time. Different from the second embodiment. Hereinafter, in the description of the third embodiment, the description of the same part as the first embodiment or the second embodiment is omitted, and is different from the first embodiment or the second embodiment. The location will be described.

  In the first embodiment and the second embodiment, the suction control unit 402 controls the suction force according to the type of jam and the number of times it occurs. In the present embodiment and the second embodiment, there is a situation in which a jam cannot be handled. For example, the table T2 includes “paper type: trepe”, “paper thickness: thin”, “temperature: 11 to 20”, “jam type: carriage”, “cumulative number: I”, and “paper type: trepe” “paper thickness”. : “Thin”, “Temperature: 11 to 20”, “Jam type: Paper discharge jam”, “Cumulative number: I” are stored, the suction control means 402 is “Paper type: Trepe” “Paper thickness: Thin” Under the conditions of “Temperature: 11 to 20”, the occurrence of carriage jam is newly detected and the suction force is increased by 5%. When the occurrence of paper discharge jam is detected under the same condition, the suction force is reduced by 5%. To do. That is, the suction force after the suction control returns to the suction force in which the carriage jam has occurred.

  Therefore, in the third embodiment, in addition to the type of jam and the number of occurrences, the type of jam detected this time is compared with the type of jam detected last time. Specifically, the suction conditions are controlled using the result of comparing the type of jam detected this time with the type of jam detected last time, under the same printing conditions.

  FIG. 9 is a flowchart illustrating the flow of the suction control process executed by the main control unit 301 of the inkjet recording apparatus 100 according to the third embodiment. In addition, about the process of step S1-S9, since it is the same as step S1-S9 demonstrated in FIG. 6 of 1st Embodiment, description is abbreviate | omitted.

  As illustrated in FIG. 9, when the number of times of accumulation in the table T2 is less than M (Yes in Step S10), the suction control unit 402 determines that the jam can be eliminated by performing suction correction, and proceeds to Step S21.

  In step S <b> 21, the suction control unit 402 determines whether the currently detected jam and the previously detected jam type are different and the printing conditions are the same.

  If the previous jam type is the same or the printing conditions are not the same (No in step S21), the suction control unit 402 proceeds to step S11. Since the processing after step S11 is the same as the processing after step S11 described in FIG. 6 of the first embodiment, the description thereof is omitted.

  On the other hand, if the suction control unit 402 is different from the previous jam type and the printing conditions are the same (Yes in step S21), the suction control unit 402 proceeds to step S22.

  In step S22, the suction control unit 402 determines whether the currently detected jam is a paper discharge jam. If the currently detected jam is a paper discharge jam (Yes in step S22), the suction control unit 402 proceeds to step S23, and if it is not a paper discharge jam (No in step S22), the suction control unit 402 proceeds to step S24.

  In step S23, the suction control unit 402 corrects the suction so that the suction force is smaller than the current suction force and larger than the previous suction force, and proceeds to step S15. .

  In step S24, the suction control unit 402 corrects the suction so that the suction force is larger than the current suction force and smaller than the previous suction force, and the process proceeds to step S15. .

  Thus, according to the present embodiment, in addition to the type of jam and the number of occurrences of jam, the type of jam detected this time is compared with the type of jam detected last time. Even when a paper discharge jam occurs as a result of increasing the force, the occurrence of a carriage jam and a paper discharge jam can be suppressed in the next image formation. The same applies when a carriage jam occurs after a paper discharge jam occurs. As described above, the third embodiment can more effectively suppress the occurrence of jam than the first embodiment and the second embodiment.

  In each embodiment, a roll paper (paper 110) is applied as a sheet-like transported object, and suction is prevented from occurring when an image is formed on the roll paper (paper 110). Although the control method was demonstrated, it is not restricted to this. For example, the suction control method described in each embodiment can be applied to an image forming apparatus that uses a cut sheet such as A4 or B4 instead of roll paper as the paper 110 and forms an image on the cut sheet. it can. In addition, the sheet-like object to be conveyed is not limited to roll paper, but paper, coated paper, cardboard, OHP film, plastic film, prepreg, copper foil, cloth, leather, other films, glass, wood, ceramic, It means that a liquid of an electronic component such as an electronic substrate or a piezoelectric element can be attached at least temporarily, and adheres and adheres, or adheres and penetrates.

  The “liquid” is not particularly limited as long as it has a viscosity and surface tension that can be ejected from the recording head 221, but the viscosity becomes 30 mPa · s or less at room temperature, normal pressure, or by heating and cooling. It is preferable. More specifically, solvents such as water and organic solvents, colorants such as dyes and pigments, functional materials such as polymerizable compounds, resins, and surfactants, and biocompatible materials such as DNA, amino acids, proteins, and calcium. , Edible materials such as natural pigments, solutions, suspensions, emulsions, and the like. These include, for example, inkjet inks, surface treatment liquids, components of electronic devices and light emitting devices, and formation of electronic circuit resist patterns. It can be used in applications such as liquids for use, three-dimensional modeling material liquids, and the like.

  In each embodiment, the suction conveyance unit 107 guides the sheet 110 onto the platen member 204 by the registration roller 201 and the registration pressure roller 202, and sucks the sheet 110 onto the platen member 204 by driving the suction fan 208. However, it is not limited to this.

  For example, as a technique for adsorbing an object to be conveyed, an electrostatic adsorption technique for conveying an object by electrically adsorbing the object to be conveyed to a conveying member that conveys the object to be conveyed is already known. Specifically, there are a conveying member, an insulating layer provided along the conveying member, and a positive and negative electrode embedded in the insulating layer. The conveyed product and the conveying member are electrically adsorbed. The adsorption conveyance unit 107 may apply such an electrostatic adsorption technique. In order to change the attracting force in the electrostatic attracting technique, a method of changing the magnitude of the DC voltage is conceivable.

  In each of the embodiments, the case where the adsorption device is applied to the ink jet recording apparatus 100 that is a liquid ejection device that ejects liquid has been described as an example. However, the present invention is not limited to this.

  For example, the present invention can also be applied to an apparatus that performs processing other than image formation (for example, processing for applying a liquid to a recording medium) on an object to be transported as a suction device. In addition, a device that performs processing such as laser processing on an object to be transported as an adsorption device, or a solid that is discharged onto a medium while dissolving a resin in order to form a three-dimensional model (three-dimensional model) The present invention can also be applied to a modeling apparatus (three-dimensional modeling apparatus).

  In addition, the “device for ejecting liquid” includes a device in which the liquid ejection head and the device to which the liquid can adhere move relatively, but is not limited thereto. Specific examples include a serial type apparatus that moves the recording head 221 and a line type apparatus that does not move a line head unit including a plurality of recording heads 221. Further, the “apparatus for ejecting liquid” is not limited to an apparatus in which significant images such as characters and figures are visualized by the ejected liquid. For example, what forms a pattern etc. which does not have a meaning in itself, and what forms a three-dimensional image are also included.

  In the “line type apparatus”, a line head unit including a plurality of recording heads 221 is used as a liquid ejecting unit. Further, the “jamm generated when the sheet 110 floats from the conveyance path” described in the embodiment of the present invention is the “line type device” in which “the line head unit is formed by the sheet 110 floating from the conveyance path”. Or, a “jam that occurs due to contact with one or more recording heads 221”.

  Although the embodiment according to the present invention has been described above, the present invention is not limited to the above-described embodiment as it is, and is embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. it can. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above-described embodiments. For example, some components may be deleted from all the components shown in the embodiment.

DESCRIPTION OF SYMBOLS 100 Adsorption device, Liquid discharge device 110 Conveyed object 107 Adsorption means 301 Control part 401 Detection means 402 Adsorption control means 403 Storage means T1, T2 Table

JP 2009-234013 A

Claims (13)

An adsorbing means for adsorbing the object to be conveyed with a predetermined adsorption force when conveying the sheet-like object to be conveyed;
Detecting means for detecting an abnormal state generated in the transported object on the transport path of the transported object;
A suction control means for controlling the suction force of the suction means in accordance with the type of the abnormal state detected by the detection means;
An adsorption apparatus comprising: The suction control means strengthens the suction force of the suction means when the type of the abnormal state is floating of the object to be transported from the transport path;
The adsorption device according to claim 1. The suction control means weakens the suction force of the suction means when the type of the abnormal state is an abnormality in transport of the object to be transported;
The adsorption apparatus according to claim 1 or 2, wherein The suction control means controls the suction force of the suction means according to the number of detections for each type of abnormal state.
The adsorption device according to any one of claims 1 to 3, wherein The number of times of detection for each type of the abnormal state, the control amount serving as a reference for the suction force of the suction means according to the information relating to the control of the suction force of the suction means, and the suction force of the suction means are stored in association in a table A storage means,
The suction control means controls the suction force of the suction means using the table;
The adsorption device according to any one of claims 1 to 4, wherein The condition relating to the control of the suction force of the suction means is at least one of the type of the transported object, the thickness of the transported object, the temperature, and the transport position of the transported object.
The adsorbing device according to claim 5. The suction control means updates the table after controlling the suction power of the suction means with the suction power of the suction means corrected by the control amount of the suction power as the reference based on the number of times of detection.
The adsorption device according to claim 5 or 6. The adsorption control means includes
The type of the abnormal state currently detected is different from the type of the abnormal state detected last time, and the conditions regarding the control of the suction force of the suction means are the same,
When the type of the abnormal state currently detected is the floating of the object to be conveyed from the conveyance path, the adsorption force of the adsorption unit is stronger than the current adsorption force and is generated in the previous object to be conveyed. Control that becomes weaker than the suction force when an abnormal state is detected,
When the type of the abnormal state that is currently detected is an abnormality in the conveyance of the object to be conveyed, the adsorption state of the suction means is weaker than the current adsorption force, and the abnormal state that occurred in the previous object to be conveyed Control that is stronger than the suction force when detecting
The adsorption device according to any one of claims 5 to 7, wherein Liquid ejection means for ejecting liquid;
An adsorbing means for adsorbing the object to be conveyed with a predetermined adsorption force when conveying the sheet-like object to be conveyed;
Detecting means for detecting an abnormal state generated in the transported object on the transport path of the transported object;
A suction control means for controlling the suction force of the suction means in accordance with the type of the abnormal state detected by the detection means;
A liquid ejection apparatus comprising: The suction control means performs control to increase the suction force of the suction means when the abnormal state detected by the detection means is in a state where the liquid discharge means and the transported object are in contact with each other.
The liquid ejecting apparatus according to claim 9. The suction control means performs control to weaken the suction force of the suction means when the abnormal state detected by the detection means is a state where an abnormality has occurred in the transport of the transported object.
The liquid ejecting apparatus according to claim 9 or 10, wherein the liquid ejecting apparatus is a liquid ejecting apparatus. A program executed by a control unit that controls an adsorption device having an adsorption unit that adsorbs the conveyance object with a predetermined adsorption force when conveying the sheet-shaped conveyance object,
The control unit
Detecting means for detecting the type of abnormal state that has occurred in the conveyed object on the conveying path of the conveyed object;
A suction control means for controlling the suction force of the suction means in accordance with the type of the abnormal state detected by the detection means;
Program to function as. An adsorption control method in which an adsorption device having an adsorption unit that adsorbs the conveyance object with a predetermined adsorption force when the sheet-like conveyance object is conveyed controls the adsorption force of the adsorption means,
An information acquisition step of acquiring information related to the control of the suction force of the suction means;
A first suction control step for controlling the suction force of the suction means based on the information acquired in the information acquisition step;
A detection step of detecting a type of an abnormal state occurring in the transported object on the transport path of the transported object;
A second suction control step for controlling the suction force of the suction means according to the type of the abnormal state detected in the detection step;
The adsorption | suction control method characterized by including.

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