JP5801043B2 - Recording device - Google Patents

Description

The present invention relates to a recording equipment of an ink jet ejecting ink onto a recording medium in which is supported on the rotating member.

  2. Description of the Related Art Inkjet printers that record a desired image on a recording medium using an inkjet head are widely known. The recording medium is transported onto the platen by the transport device, and the recording medium is supported while the inkjet head is reciprocally scanned in the width direction of the recording medium. The recording medium is supported by the rotating body, and ink is ejected from the inkjet head to the recording medium. Printers are known. As an ink jet printer for recording in a state where a recording medium is supported on a rotating body, for example, there is a printer described in JP-A-2009-196448. In this printer, the recording medium is fixed to the rotating body by a claw member. The ink is ultraviolet curable ink, and after the ink is ejected onto the recording medium, the ink is irradiated with ultraviolet rays to be cured and fixed. Further, in order to prevent uneven rotation of the rotating body, a current profile for driving the rotating body is created from the detection result of the rotating state of the rotating body, and a current corresponding to the current profile is supplied to the drive motor, Drive.

JP 2009-196348 A

  In the conventional printer, when the non-holding area where the holding drum does not hold the sheet faces the head carriage, the head carriage is moved to a position for printing by the next rotation. However, in the conventional printer, since the carriage is merely moved between the end and the leading end of the paper, if there is a nozzle that does not eject ink, ejection failure may occur due to thickening of ink around the nozzle. In conventional printers, in order to prevent ink thickening, a maintenance device is placed outside the rotating body to discharge thickening ink. Therefore, when ejecting the thickened ink using the time that the portion that does not support the recording medium passes, the carriage must be taken out of the rotating body and returned to the recording medium in a short time. For this reason, since the carriage is driven at a high speed, there is a problem in that the control becomes complicated and the drive mechanism becomes large. Alternatively, it is conceivable to secure a wide area not holding the paper, but there is a problem that the diameter of the holding drum needs to be increased, and the apparatus becomes large. Or, it may be possible to rotate the ink more than one rotation for the preliminary discharge of the thickened ink and to reciprocate to the maintenance device during that time, but there is a problem that hinders the printing speed.

  In addition, the rotation unevenness of the rotating body is prevented by supplying a current corresponding to the current profile to the drive motor, but there are many causes for the rotation unevenness, and correction was made every time these causes occurred. However, there is a problem that the load of the control processing becomes large and that it is necessary to rotate extra for correction.

  In addition, since the head unit and the ultraviolet irradiation unit are driven separately, there is a problem in that the size of the device increases because a driving mechanism is required for each. Moreover, since each of them must be driven and controlled, there is a problem that the mechanism and processing become complicated.

  The present invention provides a recording apparatus that can prevent rotation without a printing operation, suppress variation in quality of an image formed on a recording medium, and reduce the size of the apparatus. The present invention also provides a recording apparatus that prevents supply of a recording medium, printing, and ink thickening in accordance with the rotation of a rotating body when printing is performed by continuously supplying the recording medium to the recording apparatus.

The recording apparatus of the present invention
A recording head, a carriage on which the recording head is mounted, driving means for driving the carriage in the width direction of the rotating body, paper feeding means for supplying a recording medium to the rotating body, and the recording medium from the rotating body A paper discharge means for discharging, a holding means for holding the recording medium on the rotating body, a first detecting means for detecting the recording medium held on the rotating body,
Rotator position detecting means for detecting the position of the surface of the rotator in the rotation direction;
A recording head position detecting means for detecting the position of the head;
The recording medium held on the rotating body by detecting the leading end and the end of the recording medium by the first detecting means and detecting the position of the surface of the rotating body in the rotating direction by the rotating body position detecting means. acquiring position in the rotating surface, wherein the recording head position detecting means obtains the position of the recording head, and further obtains the formation position location of the image to be recorded on the recording medium, the surface of the rotating member of the recording medium From the end of recording performed on the recording medium during one rotation of the rotating body based on the position in the rotation direction, the position of the recording head, and the formation position to the start of recording performed during the next one rotation during, control of performing the control from the discharge nozzle Ru is preliminarily discharging ink of at least one drop in place of the recording head and control for moving the recording head to the recording start position Means for receiving image data from a host computer and ejecting ink from the ejection nozzles of the recording head based on the image data to record an image on the recording medium held by the rotating body. In the recording apparatus, a floating detection unit for detecting the floating of the recording medium from the rotating body, and a floating correcting unit for correcting the floating of the recording medium when the recording medium floats from the rotating body. And the holding means has a plurality of suction holes communicating with the outside and the inside of the rotating body, and a suction means for sucking air through the suction hole, and the inside of the rotating body is The room is divided into a plurality of rooms in the rotation direction, the rooms communicate with a ben arranged for each room, each ben is connected to the suction means, and the suction means sucks the air through the ben. The on / off of suction for each room can be controlled by opening and closing each of the bends, and the carriage is not in contact with the recording medium when the floating detection means detects the floating of the recording medium. The carriage is retracted and the floating correction means corrects the floating of the recording medium, and the floating correction means opens and closes the bent to switch on and off the suction for each room to the rotating body. The suction of the recording medium held is varied for each room, and the recording medium is lifted by moving the recording medium minutely.

  According to the present invention, image recording on a recording medium can be performed at a high speed, and printing can be suitably performed on the recording medium.

FIG. 1 is a schematic diagram showing the configuration of the recording apparatus according to the first embodiment. FIG. 2 is a block diagram showing the configuration of the recording apparatus. FIG. 3 is a diagram for explaining conveyance of the recording medium. FIG. 4 shows the movement of the carriage. FIG. 5 is a schematic diagram showing the configuration of the rotating body. FIG. 6 is a schematic view showing an internal configuration of the rotating body. FIG. 7 is a schematic view showing an example of means for correcting the floating. FIG. 8 is a diagram showing an example of printing on a plurality of recording media. FIG. 9 is a schematic diagram showing a state of recording on a recording medium. FIG. 10 is a schematic diagram showing the configuration of the recording medium floating detection means. FIG. 11 is a schematic diagram showing a configuration of a means for conveying the recording medium by inverting it. FIG. 12 is a schematic diagram illustrating a configuration of a recording apparatus according to the second embodiment. FIG. 13 is a diagram illustrating a circuit configuration arranged inside the rotating body.

A mode for carrying out the invention will be described with reference to the drawings.
FIG. 1 is a schematic diagram showing the configuration of the recording apparatus according to the first embodiment.
The embodiment will be described using an ink jet printer as an example of a recording apparatus. The recording apparatus 100 is an ink jet printer. The rotating body 1 has a cylindrical shape and holds the recording medium 24 on the surface. The rotating body 1 is a metal cylinder, for example, aluminum, and the surface is covered with an insulating layer. The recording medium 24 is charged by a charger 17 which is a charging unit. The recording medium 24 is attracted to the rotating body 1 by setting the rotating body 1 to a predetermined potential, for example, a ground potential. Further, the rotating body 1 has a communication hole that communicates the inside and the outside, and the recording medium 24 on the surface is adsorbed by lowering the internal atmospheric pressure. In order to lower the air pressure inside the rotating body 1, air is discharged to the outside by suction means having a suction fan 15. The suction fan 15 and the rotating body 1 are connected by a pipe 16. In order to hold the recording medium 24 on the rotating body 1, static electricity means and suction means are used, but either one may be used.

  The Y head 3 is a recording head that discharges yellow ink. The M head 4 is a recording head that discharges magenta ink. The C head 5 is a recording head that discharges cyan ink. The K head 6 is a recording head that discharges black ink. These recording heads are ink jet heads. These recording heads are supplied with ink from an ink tank for each recording head. A nozzle that ejects ink from the recording head faces the rotating body 1. These recording heads are mounted on the carriage 2. The carriage 2 moves along the surface of the rotating body 1. Further, the carriage 2 is moved in the contact / separation direction from the surface by a carriage height varying means that varies the distance from the surface of the rotating body 1.

  The recording medium 24 is a sheet-like recording medium, such as paper, a plastic sheet, or cloth. The sheet feeding stocker 10 stores a sheet-like recording medium 24 and is controlled by a control unit to be described later, and discharges the recording medium 24 in response to a request. The discharged recording medium 24 is supplied to the rotating body 1 by the paper feed roller 8. A detection sensor 18 that detects the recording medium 24 is disposed downstream of the paper feed roller 8 and upstream of the charger 17. The detection sensor 18 receives light that is emitted and reflected and returns, and detects the recording medium 24 by comparing intensity data of the received light with previously recorded intensity data. The front end, end, type, and the like of the recording medium 24 can be detected.

  The rotating body 1 is connected to a driving motor 13 that rotates the rotating body 1 and a belt 14. When the drive motor 13 rotates, the rotating body 1 rotates.

  A detection sensor 19 for detecting the position of the recording medium 24 held on the rotating body 1 is arranged in the direction opposite to the rotation direction of the rotating body 1 with respect to the carriage 2. The detection sensor 19 detects the tip, end, type, and the like of the recording medium 24. The displacement sensor 20 detects how much the surface of the recording medium 24 held by the rotating body 1 is displaced with respect to the surface of the rotating body 1. It is also used for detecting the floating of the recording medium 24 from the rotating body 1.

  The carriage 2 is equipped with fixing means 7 for fixing the ink ejected by the recording head. The fixing unit 7 may fix the ink completely, or it may be assumed to fix the ink. In the case where the ink is assumed to be attached, a fixing device that completely fixes the ink downstream of the conveyance path of the recording medium 24 is further required. The fixing unit 7 is a heating unit such as a heater or an infrared irradiation device for heating the ink when the ink is fixed by heat. When the ink is cured and fixed by ultraviolet rays, ultraviolet irradiation means such as ultraviolet LEDs and ultraviolet lamps are used.

  When ink is ejected onto the recording medium 24, the charged potential may become weak. In that case, a recharger 27 as recharging means for recharging the recording medium 24 in the rotation direction of the rotating body 1 of the carriage 2 is arranged to recharge the recording medium 24 after recording.

  The peeling claw 21 is a means for peeling the recording medium 24 held by the rotating body 1 and changing the direction toward the paper discharge roller 9. The peeling claw 21 can be rotated to a peeling position 22 indicated by a dotted line. At this position, the tip of the peeling claw 21 comes into contact with the rotating body 1. Further, air is compressed by an air compressor 23 so that the recording medium 24 is easily peeled from the rotating body 1, and compressed air is blown from a pipe 25 directed to the peeling position of the recording medium 24. Furthermore, it becomes easier to peel off by temporarily stopping the suction from the suction hole. Further, the peeling claw 21 is provided with a static elimination means. For example, a metal part connected to GND is provided.

  The recording medium 24 indicated by a broken line from the rotating body 1 to the paper discharge stocker 11 also shows a conveyance path from the rotary body 1 to the paper discharge stocker 11. The recording medium 24 is discharged by the discharge roller 9. The fixing device 12 is a fixing unit that completely fixes the assumed ink. The fixing device 12 is a heating unit such as a heater or an infrared irradiation device when the ink is fixed by heat, and an ultraviolet irradiation unit such as an ultraviolet LED or an ultraviolet lamp when the ink is cured and fixed by ultraviolet rays. . The paper discharge stocker 11 stores the recording medium 24 after recording. The fixing device 12 is preferably disposed upstream of the paper discharge roller 9 in the transport direction. This is because the assumed ink does not stain the paper discharge roller 9.

FIG. 2 is a block diagram showing the configuration of the recording apparatus.
The control unit 30 is a control unit that controls the entire recording apparatus 100. The control means 30 operates according to the program and data recorded in the ROM 41. The control means 30 is a CPU, for example. The RAM 42 is used for temporarily storing a work area and data during operation of the control means 30. The interface 31 is an interface for connecting the recording apparatus 100 with an external device such as a host computer. The operation panel 32 has an input means for inputting to the control means 30 and a display panel for displaying characters and numbers under the control of the control means 30.

  The paper feeding means 33 is controlled by the control means 30. The sheet feeding means 33 includes a sheet feeding stocker 10 and a supply roller 8, and supplies the recording medium 24 in the sheet feeding stocker 10 to the rotating body 1. The supply roller 8 is controlled by the control means 30 such as the rotation direction, the rotation speed, the rotation start, and the rotation stop. The paper discharge unit 34 is controlled by the control unit 30. The paper discharge unit 34 includes a paper discharge stocker 11 and a paper discharge roller 9, and conveys the recording medium 24 from the rotating body 1 to the paper discharge stocker 11. The discharge roller 9 is controlled by the control means 30 such as the rotation direction, rotation speed, rotation start, and rotation stop.

  The air blowing means 35 is controlled by the control means 30. The blower means 35 has an air compressor 23 and a pipe 25 connected thereto, and operations such as creation and discharge of compressed air are controlled. The claw driving means 36 is controlled by the control means 30 and rotates the peeling claw 21. The position of the peeling claw 21 is driven to a peeling position or an open position where no peeling is performed. The suction means 37 is controlled by the control means 30. The suction means 37 has a suction fan 15 and a pipe 16, operates the suction fan 15, and sucks air from a suction hole in the rotating body 1. The operation of the suction fan 15 is controlled by the control means 30 in the suction means 37. The charging unit 38 includes the charger 17 and is controlled by the control unit 30. The charger 17 is controlled by the control means 30 for operations such as start and end of charging, and change of intensity. The recharging means 39 has a recharger 27 and is controlled by the control means 30. The recharger 27 is controlled by the control means 30 for operations such as charging start, end, and intensity change.

  The neutralizing unit 40 neutralizes the charged recording medium 24. The static elimination means 40 is controlled by the control means 30. The static elimination means 40 is controlled by the control means for operations such as start and end of static elimination. The neutralizing unit 40 is provided at a position that directly contacts the recording medium 24 such as the peeling claw 21 and the paper discharge roller 9.

  The rotating body position detecting means 44 is controlled by the control means 30. The rotating body position detecting means 44 will be described later in detail. This is a kind of encoder in which a scale is provided on the outer periphery of the rotating body 1 and its memory is detected by light. The control unit 30 receives a signal from the rotating body position detection unit 44 and calculates the position of the surface of the rotating body 1 and the speed of the rotating body 1. The acquired various values are stored in the RAM 42 and used for various calculations and controls. Based on the scale detection signal detected by the rotating body position detecting means 44, a drive timing signal for the print head is generated, supplied to the print head, and discharged based on the drive timing signal. Accordingly, even if there is rotation unevenness, the ink discharge timing is performed based on the position of the surface of the rotating body, and thus it is possible to prevent printing misalignment.

  The rotating body driving means 45 is controlled by the control means 30. The rotating body drive means 45 includes a drive motor 13 and a belt 14. The operation of the drive motor 13 is controlled by the control means 30 such as the rotation speed and the rotation direction. It is controlled to rotate at a constant speed during recording.

  The linear encoder 46 is controlled by the control means 30. The linear encoder 46 is mounted on the carriage 2. Details will be described later. It is an encoder that detects linear scale memory with light. The position of the carriage 2, Y head 3, M head 4, C head 5, K head 6, and fixing unit 17 is acquired by receiving a signal from the linear encoder 46 and calculating by the control unit 30. The acquired various values are stored in the RAM 42 and used for various calculations and controls.

  The carriage driving unit 47 is controlled by the control unit 30 and drives the carriage 2. Under the control of the control means 30, a necessary movement amount is calculated up to a desired movement position based on the acquired position of the carriage 2, and the carriage 2 is moved to the desired movement amount, so that the carriage 2 is moved to the desired position. Can be put.

  The printing unit 48 includes a Y head 3, an M head 4, a C head 5, and a K head 6, and ejects ink under the control of the control unit 30. The printing unit 48 controls the control unit 30 to apply ink to a desired position according to the acquired position of the Y head 3, M head 4, C head 5, and K head 6, the speed of the rotating body 1, and the position of the recording medium. Discharge.

  The fixing unit 7 is controlled by the control unit 30. The fixing means 7 is controlled by the control means 30 for operations such as the intensity of energy for fixing the ink, start, and stop.

  The secondary fixing unit 12 is controlled by the control unit 30. The secondary fixing means 12 is controlled by the control means 30 for operations such as the intensity of energy for fixing the ink, start, and stop.

  The tertiary fixing unit 43 is controlled by the control unit 30. The tertiary fixing means 43 is controlled by the control means 30 for operations such as the intensity of energy for fixing the ink, start, and stop.

  The cap driving means 49 drives the cap so as to be in close contact with the nozzle surfaces of the Y head 3, the M head 4, the C head 5, and the K head 6. Maintenance of the print head is performed, for example, the ink in the print head is forcibly discharged outside by sucking the inside of the cap. In addition, ink may be preliminarily ejected into the cap. The cap drive means 49 is controlled by the control means 30.

  The first detection means 50 having the detection sensor 19 for detecting the position of the recording medium 24 on the rotating body 1 is controlled by the control means 30. The position of the recording medium 24 relative to the surface of the rotator 1 is obtained by the control means 30 receiving the signal from the detection sensor 19 and further calculating using the surface position of the rotator 1 stored in the RAM 42. The acquired various values are stored in the RAM 42 and used for various calculations and controls.

  The second detection means 51 having the detection sensor 18 for detecting the position of the recording medium 24 before reaching the rotating body 1 is controlled by the control means 30. By receiving a signal from the detection sensor 18 and calculating by the control means 30, information on which position of the leading edge of the recording medium 24 is in the conveyance path is acquired. Since the conveyance of the paper feed roller 8 is controlled by the control unit 30, the conveyance amount is obtained therefrom, and further, the leading end position information of the recording medium 24 is obtained, thereby calculating the position of the recording medium 24. The acquired various values are stored in the RAM 42 and used for various calculations and controls.

  The displacement sensor 20 has a light emitting means 52 and a light receiving means 53. The displacement sensor 20 is controlled by the control means 30. The light emitting means 52 and the light receiving means 53 are controlled by the control means 30. The light emitting means 52 is controlled by the control means 30 for operations such as light emission and extinction. The control unit 30 receives a signal from the light receiving unit 53 and obtains information such as whether or not the light can be received from the light receiving unit 53 by digitizing. The acquired various values are stored in the RAM 42 and used for various calculations and controls.

  Details of the Ben drive means 54 will be described later. The ben drive means 54 is controlled by the control means 30. The inside of the rotating body 1 is divided into a plurality of rooms, and whether or not to suck each room is controlled by opening and closing of the ben. The ben is driven by the ben drive means 54.

  The recording apparatus 100 configured as described above performs printing in a state where the leading end of the recording medium 24 is attracted to a predetermined position of the rotating body 1 and the leading end to the end of the recording medium 24 are not attracted to the rotating body 1. Printed by means 48. Printing is not performed when the leading end of the recording medium 24 is not at a predetermined position, when the trailing end cannot be detected, or when floating of the recording medium 24 is detected. In that case, a correction operation for attracting the recording medium 24 to the rotating body 1 is performed or the paper is discharged. The length of the recording medium 24 supplied based on the detection of the leading end and the end of the recording medium 24 is acquired by the second detecting means 51 by the control means 30. When this length exceeds the allowable length that can be attracted to the rotating body 1, the rotation of the rotating body 1 is stopped and the carriage 2 is retracted. For example, the allowable length is not less than the outer peripheral length of the rotating body 1. In such a case, if the recording medium 24 is attracted to the rotating body 1, it cannot be discharged. Similarly, when the recording medium 24 is shorter than the length from the rotating body 1 to the paper discharge roller 9, the paper cannot be discharged in the same manner. In such a case, the rotating body 1 is immediately stopped and the recording medium 24 is removed. At this time, control is performed so that a predetermined position of the rotating body 1, for example, the position of the front end or the end of the recording medium 24 always stops at the same position. The recording medium 24 can be easily removed.

FIG. 3 is a diagram for explaining conveyance of the recording medium.
FIG. 3A is a diagram of an initial state in which the recording medium 24 is started to be held on the rotating body 1. When the leading edge of the recording medium 24 is detected by the detection sensor 18, it can be seen that the leading edge of the recording medium 24 is at the position of the detection sensor 18. The conveyance amount necessary for the leading end of the recording medium 24 to reach the position of the charger 17 and the conveyance amount necessary for reaching the rotating body 1 are based on the conveyance amount of the paper feed roller 8. Calculated and acquired by At least before the leading end of the recording medium 24 reaches the charger 17, the controller 17 is controlled by the control means 30 so that it operates. The charging unit 17 is controlled by the control unit 30 so as to operate until all the recording medium 24 passes through the charging unit 17. The recording medium 24 is charged by the charger 17.

  The rotating body 1 is set to a predetermined potential, for example, a GND potential. The surface of the rotating body 1 has an insulating layer, and the recording medium 24 is adsorbed to the rotating body 1 while being charged. The control unit 30 controls the suction unit 37 so that the recording medium 24 is sucked to at least the rotating body 1. The recording medium 24 is conveyed so that the tip of the recording medium 24 is attracted to a predetermined position of the rotating body. The predetermined position of the rotating body is a predetermined position of the rotating body. For example, a suction hole to be described later is a portion arranged more densely than other portions.

  Further, the recording medium 24 peeled from the rotating body 1 and the fed recording medium 24 are controlled so as not to overlap. Until the recording medium 24 is discharged from the rotating body by the paper discharge roller 9, the peeling claw 21 is in a position where the recording medium 24 is peeled off. Thereafter, when the recording medium 24 is discharged, the recording medium 24 is brought into an open position where it does not contact the recording medium 24.

  FIG. 3B is a diagram showing a state in which the recording medium 24 is held by the rotating body 1. In a state where the recording medium 24 is held by the rotating body 1, the peeling claw 21 is located in an open state. The recording medium 24 on the paper supply side stops before the charger 17 by stopping the paper supply roller 8. This is because charging is not performed in this state. In this state, adhesion of dust and the like due to charging is prevented. The recording medium 24 on the paper discharge side is conveyed while fixing ink by the fixing device 12. The rotating body 1 is controlled by the control means 30 so as to rotate at a constant speed.

  FIG. 3C is a diagram showing a state immediately before the recording medium 24 is peeled from the rotating body 1. When the end of the recording medium 24 passes, the peeling claw 21 is rotated to the rotating body 1 side before the tip reaches. Further, compressed air is injected from the compressed air machine 23. Then, peeling of the recording medium 24 is started. At this time, if the suction of the rotating body 1 is temporarily stopped, the peeling becomes easy. When the interior of the rotating body 1 to be described later is divided into a plurality of rooms, the suction of the part of the room holding the tip of the recording medium 24 may be temporarily stopped.

  FIG. 3D is a diagram showing a state where the recording medium 24 is discharged from the rotating body 1. The paper is discharged while being peeled off by blowing the peeling claw 21 and compressed air. When the recording medium 24 reaches the paper discharge roller 9, the paper is also discharged by the paper discharge roller 9. Further, the sheet may be discharged while neutralizing with compressed air. According to the compressed air machine 23 which has a static elimination function, it is realizable. The charge of the recording medium 24 can be removed by discharging the discharge roller 9 to the GND potential, thereby eliminating the influence of the charge on the subsequent conveyance.

  FIG. 4 shows the movement of the carriage. FIG. 4A is a diagram illustrating a state in which the end of the recording medium has reached the position of the carriage. The recording medium 24 held by the rotating body 1 has a gap between the front end and the end. The rotating body 1 rotates and the end has reached the position of the carriage 2. In the vicinity of the end of the recording medium 24, ink is preliminarily ejected from all nozzles onto the recording medium 24 in order to prevent ink thickening. The vicinity of the end is between the end of the image recording area and the end of the recording medium 24, and is a position closer to the end of the recording medium 24 than the end of the image recording area. When the discharged ink is fixed by the fixing means 7, the carriage 2 moves to the next recording position.

  FIG. 4B is a diagram illustrating the movement of the carriage. The carriage 2 is moved until the next printing starts. The next printing starts from a predetermined position. The pre-discharged ink is displayed as a color bar 60.

  FIG. 4C is a diagram illustrating a state where the leading end of the recording medium has reached the position of the carriage. When the leading end of the recording medium 24 reaches the position of the carriage 2, printing is started from a predetermined position.

  FIG. 5 is a schematic diagram showing the configuration of the rotating body. The rotating body 1 has a plurality of suction holes 62 arranged over the entire surface. A place where the suction holes 62 are dense is parallel to the width direction of the rotating body 1. This is where the tip of the recording medium 24 is located. This is because the suction holes 62 are arranged densely so that the leading end of the recording medium 24 is sucked more strongly than other places to prevent floating. The preliminary ejection area 63 is a place where preliminary ejection is performed. When the preliminary ejection is not performed on the recording medium 24, the preliminary ejection is performed on the preliminary ejection area 63.

  FIG. 6 is a schematic view showing an internal configuration of the rotating body. The rotating body 1 is divided into at least one or more rooms, and suction ON and OFF can be controlled for each room. In this example, the rotating body 1 is divided into six chambers, a first suction chamber 64, a second suction chamber 65, a third suction chamber 66, a fourth suction chamber 67, a fifth suction chamber 68, and a sixth suction chamber 69. . In each room, there are six Bens: a first Ben 70, a second Ben 71, a third Ben 72, a fourth Ben 73, a fifth Ben 74, and a sixth Ben 75. These Bens are for selecting whether or not each room is connected to the suction fan 15. When the ben is opened, suction is performed, and when the ben is closed, suction is stopped. The ben driving means 54 and the first ben 70, the second ben 71, the third ben 72, the fourth ben 73, the fifth ben 74, and the sixth ben 75 are connected by a control line 76, and the opening and closing of each ben is controlled. .

  FIG. 13 is a diagram illustrating a circuit configuration arranged inside the rotating body. It is divided into a main body side circuit 97 and a rotating body side circuit 98. The Ven communication means 99 is further connected to the control means 30 described in FIG. 2, and controls this. The Ben communication means 99 is connected to the main body side transceiver 103 and the electromagnetic induction means 100. The electromagnetic induction means 100 wirelessly shares electric power with the circuit on the rotating body side by electromagnetic induction. The main body side transceiver 103 and the rotating body side transceiver 104 are connected by optical communication. The rotating body side of the electromagnetic induction unit 100 is connected to the power control unit 101, converts the supplied power into a predetermined DC voltage, and stores it in the storage battery 102. The electric power stored in the storage battery 102 is supplied to the sub control means 105 and the ben drive means 54. The sub control unit 105 and the control unit 30 are connected by optical communication, and the sub control unit 105 is controlled by the control unit 30. The sub control means 105 controls the ben drive means 54 based on an instruction from the control means 30. In this way, the circuit on the main body side and the rotating body side are connected and controlled wirelessly.

  FIG. 7 is a schematic view showing an example of means for correcting the floating. The roller shaft 77 can be driven toward and away from the rotating body 1 and is controlled by the control means 30. A plurality of rollers 78 are arranged on the roller shaft 77. When the recording medium 24 floats from the rotating body 1, the roller 78 is brought into contact with the vicinity of the end of the recording medium 24 to apply a load. The recording medium 24 is held by the rotating body 1 by the holding means and is rotated. Further, since the leading end portion of the recording medium 24 is sucked more strongly than the other portions, the leading end portion is less likely to move than the other portions. Other parts are easier to move. When the recording medium 24 is pulled by the load applied by the contact of the roller 78 and the strong suction of the tip portion, the recording medium 24 is slightly moved and the floating can be corrected. Further, as another aspect, since the rotating body 1 is divided into a plurality of rooms without contacting the roller 78, the suction load state can be changed by sequentially switching the suction of each room between ON and OFF. You can also correct the float.

  FIG. 8 is a diagram showing an example of printing on a plurality of recording media. A plurality of recording media 24 may be arranged in the width direction and the rotation direction of the rotating body 1 for recording. At this time, the width 79 necessary for moving the carriage 2 is wider than the width 80 between the other recording media. In addition, a preliminary discharge area may be arranged in a portion corresponding to the width 79 necessary for moving the carriage 2.

  FIG. 9 is a schematic diagram showing a state of recording on a recording medium. The carriage 2 moves in the width direction of the rotator 1 along a rail 83 arranged in parallel to the surface of the rotator 1. The carriage 2 is moved along the rail 83 by the rail 83 and the carriage driving means 47 mounted on the carriage 2. The carriage driving unit 47 has a linear motor and linearly drives the carriage 2.

  As another aspect, the endless belt can be fixed to the carriage 2, the endless belt can be wound around a pair of pulleys, and one pulley can be moved by being rotated by driving means such as a motor.

  A position detector 46 having a linear encoder 46 is mounted on the carriage 2. A linear scale 85 is arranged in parallel to the rail 83, and the position of the carriage 2 is acquired by detecting the memory of the linear scale 85 by the linear encoder 46.

A scale 83 is disposed at the end of the surface of the rotating body 1. Further, the surface position of the rotating body 1 is acquired by the rotating body position detecting means 44 including the encoder 82 that detects the memory of the scale 83. Recording in the recording area 87 of the rotator 1 will be described. This is an explanation of a case where four-pass recording is performed on the recording medium 24 held by the rotating body 1. The recording head is divided into four blocks equally in the moving direction, and printing is controlled for each block. The position of the carriage 2 indicated by the solid line in FIG. 9 is the position of the fourth pass. First, the right end block 84 divided into four equal parts of the recording head is printed at the position of the first print area 88 in the first rotation of the rotating body 1. By the time the leading edge of the next recording medium comes, the right end block 84 moves to the position of the second print area 89 and printing is performed by the right end area 84 and the block adjacent to the left. By the time the leading edge of the next recording medium comes, the right end block 84 moves to the position of the third print area 90, and printing is performed by the right end area 84 and the two blocks adjacent to the left. By the time the leading edge of the next recording medium comes, the right end block 84 moves to the position of the fourth print area 91 and printing is performed by the right end area 84 and the three blocks adjacent to the left. At this time, the first print basin 88 completes a print image by four different blocks. By the time the leading edge of the next recording medium comes, the right end block 84 moves by the block width, and the second print area 89 moves to a position printed by the left end block of the recording head and prints. In this way, the image is completed by moving for each block width.

  The cap 81 can be capped by the cap driving means 49 when the recording head is at the home position. By capping, thickening of the ink can be prevented. Also, the recording head can be maintained by sucking ink into the cap. Further, it can be set as a retreat place when the recording medium 24 is replaced. Since the cap 81 is on the outer side of the rotating drum 2, it is a safe position for the carriage 2 even if the recording medium 24 is jammed.

  FIG. 10 is a schematic diagram showing the configuration of the recording medium floating detection means. Light emitted from the light emitting means 52 is received by the light receiving means 53. However, when the floating 92 occurs on the recording medium 24 for some reason, the light from the light emitting means 52 is not received by the light receiving means 53. By changing the positions of the light emitting means 52 and the light receiving means 53, the distance from the light emitting means 52 to the light receiving means 53 of the optical axis to the surface of the rotating body 1 can be changed. The distance from the optical axis to the surface of the rotating body 1 is set to an allowable floating thickness. If the floating of the recording medium 1 interrupts the optical axis, the floating is not allowed. Thus, the floating state is detected, and the floating state can be acquired by the control means 30. It is preferable to set the thickness of the float that is allowed to be smaller than the distance 93 from the recording head to the surface of the rotating body 1.

  Further, when floating is detected, the carriage 30 can be prevented from coming into contact with the carriage 2 by driving the carriage height varying means by the control means 30 so that the carriage 2 is separated from the rotating body. Further, the contact can be further prevented by controlling to move to the home position.

  When floating is detected during recording on the recording medium 24, the carriage 2 is controlled so as to be separated from the rotating body, but the state when the recording is stopped at that time is stored. That is, when restarting printing, information on the restart position of the image data, the restart position of the carriage 2 and the restart position of the recording medium 24 is stored, and when restarting, it is possible to control where to restart. Furthermore, the float is corrected by means for correcting the float. If the floating cannot be corrected due to the floating correction, the paper is discharged. If the float can be corrected, the position of the recording medium 24 on the rotating body 1 is obtained again. Further, the carriage 2 is moved to the restart position based on the restart information, and the image recording is restarted from the recording restart position of the recording medium 24. Before resuming image recording, it is preferable to perform preliminary ejection at a predetermined position on the recording medium 24 and eject ink that has increased in viscosity before resuming image recording.

  FIG. 11 is a schematic diagram showing a configuration of a means for conveying the recording medium by inverting it. A path selection means 94 is arranged in front of the paper discharge stocker 11. The path selection means 94 selects whether the discharged recording medium 24 is sent to a route for transporting it to the paper discharge stocker 11 or sent to a route for transporting it to the paper feed stocker 10. The path selection unit 94 is controlled by the control unit 30. The reversing path 95 is a path for transporting the abolished recording medium 24 to the paper feeding stocker 10 in a reversed state. Double-sided printing is possible by feeding the reversed recording medium 24 again.

  In the recording apparatus 100 configured as described above, since the rotating body 1 rotates at a high speed, a strong fixing means is required to completely fix the rotating body 1 by the assumed attaching means 7 mounted on the carriage 2. The apparatus mounted in 2 will be large. Therefore, the assumed attachment means 7 mounted on the carriage 2 is made small enough to assume the ink, and is completely fixed later.

  FIG. 12 is a schematic diagram illustrating a configuration of a recording apparatus according to the second embodiment. This is because the carriage 2 is disposed in front of the portion where the carriage 2 feeds the recording medium 24 to the rotating body 1, the tertiary fixing means 43 is disposed along the rotating body 1, and the position of the charger 17 is changed. The recording medium 24 held on the rotating body 1 can be moved to a recharging position 96 where the recording medium 24 is recharged. The rest is the same as in the previous embodiment.

  By arranging the carriage 2 in front of the paper feeding portion and making the position of the charger 17 variable, the charger 17 can be used for recharging. The variable mechanism of the charger 17 is not shown. This can be realized by a mechanism that changes the angle of the direction of the charger 17 by driving the motor. The variable mechanism controls the position by the control means 30.

  The tertiary fixing unit 43 is also used for preheating the recording medium 24. Depending on the ink, the quality of the formed image may deteriorate unless the recording medium 24 is heated. The tertiary fixing unit 43 can also be used for completely fixing the post-fixation by the fixing unit 7. When the recording medium 24 is preheated by the tertiary fixing means 43, it takes time until the temperature of the recording medium 24 rises to a predetermined temperature because the rotational speed of the rotating body 1 is high. Therefore, before the recording medium 24 is attracted to the rotating body 1, the tertiary fixing unit 43 is operated to heat the rotating body 1 in advance. The temperature of the rotator 1 is set higher than a predetermined temperature, which is a preheating temperature of the recording medium 24, within a range of 1 to 5 degrees depending on the type of the recording medium 24 to be used, and is heated to that temperature. The recording medium 24 is attracted to the rotating body 1 and the temperature of the recording medium 24 rises, so that the recording medium 24 can be quickly brought to the target temperature.

  The present invention can be used in an ink jet printer.

DESCRIPTION OF SYMBOLS 1 Rotating body 2 Carriage 7 Assumed attachment means 8 Paper feed roller 9 Paper discharge roller 12 Secondary fixing means 10 Paper feed stocker 11 Paper discharge stocker 15 Suction means 17 Charging means 21 Peeling claw 24 Recording medium 62 Suction hole

Claims (10)

A recording head, a carriage on which the recording head is mounted, driving means for driving the carriage in the width direction of the rotating body, paper feeding means for supplying a recording medium to the rotating body, and the recording medium from the rotating body Paper discharge means for discharging; holding means for holding the recording medium on the rotating body;
First detection means for detecting the recording medium held by the rotating body;
Rotator position detecting means for detecting the position of the surface of the rotator in the rotation direction;
A recording head position detecting means for detecting the position of the head;
The recording medium held on the rotating body by detecting the leading end and the end of the recording medium by the first detecting means and detecting the position of the surface of the rotating body in the rotating direction by the rotating body position detecting means. acquiring position in the rotating surface, wherein the recording head position detecting means obtains the position of the recording head, and further obtains the formation position location of the image to be recorded on the recording medium, the surface of the rotating member of the recording medium From the end of recording performed on the recording medium during one rotation of the rotating body based on the position in the rotation direction, the position of the recording head, and the formation position to the start of recording performed during the next one rotation during, control of performing the ink from the discharge nozzles at least one droplet makes preliminary ejecting in place control of the recording head and control for moving the recording head to the recording start position Means for receiving image data from a host computer and ejecting ink from the ejection nozzles of the recording head based on the image data to record an image on the recording medium held by the rotating body. In the recording device,
Floating detection means for detecting floating of the recording medium from the rotating body;
A float correction means for correcting the recording medium to eliminate the floating of the recording medium when the recording medium floats from the rotating body;
The holding means has a plurality of suction holes communicating with the outside and the inside of the rotating body, and a suction means for sucking air through the suction holes, and the inside of the rotating body has a plurality of chambers in the rotation direction. The chambers are in communication with a ben arranged for each room, each of the ben is connected to the suction means, and the suction means sucks the air through the ben By opening and closing, the suction on and off for each room can be controlled,
When the floating of the recording medium is detected by the floating detection means, the carriage is retracted to a position where the carriage does not contact the recording medium, and the floating of the recording medium is corrected by the floating correction means,
The floating correction means switches the suction on and off for each room by opening and closing the bent to vary the suction load of the recording medium held on the rotating body for each room, A recording apparatus, wherein the floating of the recording medium is corrected by slightly moving the recording medium.   The recording apparatus according to claim 1, wherein the predetermined location is near the end of the recording medium. The carriage is mounted in the rotation direction of the rotator with respect to the recording head and has fixing means for fixing the ink ejected to the recording medium,
The movement of the recording head between the end of recording on the recording medium during one rotation of the rotating body and the start of recording performed during the next one rotation is after fixing by the fixing means. The recording apparatus according to claim 1, wherein the recording apparatus moves.   Between the end of recording on the recording medium held by the rotator and the start of recording on a new recording medium fed to the rotator by the paper feeding means, the position does not face the rotator. The recording apparatus according to claim 1, wherein the carriage is moved to a certain home position.   The recording apparatus according to claim 4, wherein at least one drop of ink is ejected from the nozzle when the recording head is at the home position.   When a plurality of the recording media are arranged side by side in the rotation direction of the rotating body, the interval in the rotation direction of the adjacent recording media is wider than the other intervals for moving the recording head. The recording apparatus according to any one of claims 1 to 5, wherein:   7. The recording medium according to claim 1, wherein a tip of the recording medium is positioned and held in a portion where the suction holes of the rotating body are arranged more densely than other portions. Recording device.   The holding means includes charging means for charging the recording medium before being held by the rotating body, and the recording medium is attracted to the rotating body by charging the rotating body. The recording apparatus according to any one of claims 1 to 7.   9. The apparatus according to claim 8, further comprising a recharging unit that is disposed in the rotation direction of the rotating body with respect to the recording head and recharges the recording medium after recording on the recording medium by the recording head. Recording device.   A separation unit configured to separate the recording medium held by the rotating body; actuating the separation unit to separate the recording medium; and ejecting the separated recording medium by the discharge unit; Before the rotating body makes one revolution after the paper discharge is completed, the new recording medium is fed to the rotating body by the paper feeding means, and the holding of the fed recording medium is started. The recording apparatus according to claim 1, wherein the recording apparatus is a recording apparatus.

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