JP2007119223A - Recording medium-conveying device for recording device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform sufficient conveyance without conveying failure and printing failure in a paper conveying device using electrostatic attraction. <P>SOLUTION: In an endless belt for performing paper conveying, an area for performing the electrostatic attraction is divided to an attraction part and a printing part, in the attraction part, a high voltage is applied to strongly attract the paper and the belt by a pressing roller and in the printing part, the voltage is reduced conversely. Deterioration of an image by influence of an electric field is thus eliminated. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an ink jet recording apparatus and a method for controlling the apparatus, and more particularly to a recording medium transport apparatus for an ink jet recording apparatus having a plurality of full line type ink jet recording heads having recording element arrays corresponding to the width of the recording medium. It is.

  For example, as an information output device in a word processor, personal computer, facsimile, or the like, there is a printer that records information such as desired characters and images on a sheet-like recording medium such as paper or film.

  Various methods are known as printer recording methods, but non-impact recording is possible because of non-contact recording on recording media such as paper, low running costs, easy colorization, and quietness. In recent years, the inkjet method has attracted particular attention because of its richness.

  In addition, among inkjet recording apparatuses, a full-line type recording apparatus that has a recording head having a recording element (nozzle) array corresponding to the recording width and performs recording while conveying a recording medium is more rapid in recording. It is being widely used because it is possible to make it.

  Such a full-line type recording apparatus arranges a plurality of recording heads that discharge inks of different colors in the recording medium conveyance direction so that ink can be discharged simultaneously from each recording head. The recording speed is not lowered during recording.

  A recording head of such an ink jet recording apparatus includes an energy generator that generates energy to be applied to ink in order to discharge ink as droplets from the discharge port, and the energy generator that is included in the discharge port. The ink flow path is generally composed of an ink flow path, and ink storage means such as an ink tank for storing ink supplied to the energy generator through the ink flow path.

  Recording devices having functions such as printers, copiers, facsimiles, etc., or recording devices used as output devices such as composite electronic devices and workstations including computers (hereinafter abbreviated as PCs) and word processors are based on recorded information. An image (including characters and symbols) is recorded on a recording material such as paper or a plastic thin plate. In recent years, a laser beam printer (hereinafter abbreviated as LBP), an ink jet printer (hereinafter abbreviated as IJP), a thermal printer, and the like have been put to practical use as the recording apparatus in place of the conventional dot matrix printer. To date, LBP capable of high-resolution and high-quality gradation expression and IJP capable of full-color expression of photographic image quality have been put into practical use. Accompanying this improvement in the performance of the recording apparatus main body, high-quality recording media such as glossy paper, glossy film, and code paper as well as a medium dedicated to photographic image quality have been put into practical use in order to bring out the printing performance of the recording apparatus sufficiently. ing. For this reason, the recording apparatus main body is required to have performance capable of recording on various diversified recording papers, and accordingly, the recording speed is also required to be as high as LBP.

  Therefore, in the high-speed IJP, a full-line type ink jet head is mounted, and the recording medium is conveyed under the ink jet head without moving the ink jet in the direction perpendicular to the recording medium conveying direction as in the conventional type IJP. It is configured so that printing can be performed simply by doing. As a result, the recording medium can be continuously conveyed without being intermittently conveyed as in the case of the conventional IJP, so that the printing speed can be increased. In addition, since the number of nozzles for ejecting ink has increased remarkably, the recording area per unit time also increases, so that a sufficient printing speed can be obtained even if the recording medium is conveyed at high speed.

  In this recording apparatus, a conductive electrode is provided on an endless belt member that conveys a recording medium, an electrostatic force is generated by applying an electric charge, and recording is performed while adsorbing the recording medium to the belt member and conveying the recording medium Is generally known. Hereinafter, a description will be given with reference to FIGS.

  As shown in FIG. 4, the conveying belt 31 serving as the endless belt member has an attracting force generation composed of electrode plates 36a and 36b made of conductive metal, a base layer 36c, a surface layer 36d, a power-supplied member 36e, and the like. Means are provided integrally. The power-supplied member 36e and the surface layer 36d are in the same plane.

  FIG. 5 is a view of the endless belt as viewed from above.

  Further, as shown in FIG. 6, the power supply means for supplying power to the transport belt is composed of a power supply brush 51 ', a power supply electrode 52', and a support member 53 '. The power supply member 36e is in contact with a power supply brush 51 'for supplying electric charges. Electric charges are supplied from the power supply brush 51 'to the power-supplied member 36e, and an electrostatic force is generated. Thereby, it is possible to always generate a good adsorption force.

  Moreover, although not shown in figure, the static elimination brush which performs static elimination in contact with the to-be-powered member of the said conveyance belt is provided in the conveyance direction downstream rather than the said electricity supply brush. By discharging the conveying belt with this discharging brush and eliminating the suction force, smooth discharge can be performed.

For example, Patent Document 1 and Patent Document 2 can be cited as conventional examples.
JP 2003-103857 A JP 2005-89074 A

  However, in order to attract the recording medium to the endless belt by electrostatic force, a high voltage must be applied to the electrode plate. Further, in the case of a recording medium having a weak electrostatic attraction force or a recording medium that is difficult to adsorb along the endless belt, a gap is likely to be generated between the endless belt and the recording medium, and a part of the recording medium is lifted from the endless belt. It becomes a state. When such a state occurs, the recording medium may come into contact with the bottom surface of the ink jet head when the recording medium passes directly under the ink jet head by the endless belt, causing printing failure or, in the worst case, the ink jet head. Will be destroyed.

  In order to solve such a problem, there is a method of increasing the voltage applied to the electrode plate. However, if the voltage is increased, leaks are likely to occur, and the endless belt itself may be destroyed. Also, if a leak occurs between the endless belt and the inkjet head, the inkjet head is also destroyed.

  In addition, since the strength of electrolysis generated around the endless belt increases in proportion to the voltage applied to the electrodes, the ink droplets ejected from the inkjet head are easily affected by the electric field. That is, the ink droplets ejected from the inkjet head are affected by the electric field, and land at a predetermined position on the recording medium with a shift by the amount affected by the electric field. In this case, image deterioration is caused.

The first invention according to this application is to adsorb a recording medium electrostatically by an electrostatic force generated by applying a high voltage to an endless belt having an electrode for applying a high voltage, and adsorb the recording medium to the endless belt. In the recording medium conveying apparatus of the recording apparatus having the suction roller to be
An adsorption area power supply unit that applies a high voltage to an area where the recording medium is adsorbed to the endless belt by the adsorption roller, and a print area power supply unit that applies a high voltage to a print area that performs printing on the recording medium The voltage of the area power supply unit is higher than the voltage of the print area power supply unit.

  2nd invention which concerns on this application has a temperature / humidity detection apparatus, and adjusts the voltage applied to an adsorption | suction area electric power feeding part with the detected temperature / humidity.

  A third invention according to the present application includes a temperature / humidity detection device, and adjusts a voltage to be applied to the print area power supply unit based on the detected temperature / humidity.

  4th invention which concerns on this application has a double-sided inversion apparatus, and makes the applied voltage of a suction area electric power feeding part high at the time of double-sided printing.

  As described above, according to the present invention, the recording medium is not attracted to the conveyance belt and the paper floating occurs, so that the conveyance failure such as contact with the inkjet head or the ink droplets ejected from the inkjet head occurs on the conveyance belt. There is an effect that the recording medium can be transported satisfactorily without causing deterioration in image quality due to landing from the target position due to the influence of the electric field.

  According to the second invention of the present application, the recording medium is poorly conveyed due to temperature and humidity, and particularly in a low humidity environment, the recording medium due to the decrease in electrostatic adsorption force is not attracted to the conveying belt, and the paper floats. There is an effect that a good recording medium can be conveyed without causing a conveyance defect such as contact with the head.

  According to the third invention of the present application, the recording medium is not attracted to the conveying belt in the printing area due to poor conveyance of the recording medium due to temperature and humidity, particularly due to a decrease in electrostatic adsorption force in a low humidity environment, and paper floating occurs. By doing so, there is an effect that a good recording medium can be conveyed without causing a conveyance defect such as contact with the ink jet head.

  According to the fourth invention of the present application, even in double-sided printing, the recording medium is not attracted to the conveying belt, and the paper floating occurs, so that a good recording medium does not occur such as contact with the ink jet head. There is an effect that can be carried.

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

  FIG. 1 shows a configuration diagram of a typical ink jet recording apparatus. In FIG. 1, the printing paper supply apparatus has the following configuration. A recording medium 101 that is a printing sheet is stored in a sheet feeding cassette 100. The pickup roller 102 is a roller for picking up the recording medium 101 from the paper feed cassette 100. The transport roller 302, the registration roller 303, and the paper discharge roller 304 are rollers for transporting the recording medium 101 on the transport path, and the separation device 129 has a function of separating the recording medium 101 from the transport belt 102, and the back surface. The paper discharge tray 132 stacks the printed recording media 101.

  The conveyance belt 102 is supported by a driving roller 311, a driven roller 312, and a belt sag prevention roller 313. A motor 111 is connected to the driving roller 311. When the motor 111 rotates, the driving roller 311 rotates to drive the conveyance belt 102. The belt sag prevention spring 104 is configured to apply a pressure to the belt sag prevention roller 313 so that a constant tension is applied to the conveyance belt 102. In addition, the conveyance belt 102 is provided with a high-voltage power supply unit 103 that applies a high voltage to the conveyance belt 102 and conveys the recording medium 101 by electrostatic adsorption.

  The head unit 200 is positioned on the upper side of the conveyor belt 102 and has six color printing heads mounted thereon. From the left, the sixth inkjet head 201 which is a yellow printing inkjet head, the fifth inkjet head 202 which is a magenta printing inkjet head, the fourth inkjet head 203 which is a cyan printing inkjet head, and the light magenta printing inkjet head. 3 inkjet heads 204, a second inkjet head 205 that is a light cyan printing inkjet head, and a first inkjet head 206 that is a black printing inkjet head. Each of the printing inkjet heads 201 to 206 has a nozzle portion 210 and is capped by cap units 220a and 220b when not printing. The cap units 220a and 220b can be opened and closed in the left-right direction 230a and 230b. The head unit 200 can move in the vertical direction indicated by the arrow 240 in accordance with the opening and closing of the cap units 220a and 220b.

  The double-side reversing mechanism 150 has a reversing mechanism including a pre-reversing roller 305, a reversing roller 306, a post-reversing roller 307, a double-sided roller 308, and a path switch 350, and the front and back of the recording medium 101 printed on the conveyance belt 102 is It has a function of reversing and feeding it onto the conveyor belt 102 again.

  Next, the operation will be described.

  At the start of printing, the head unit 200 once rises, moves the cap units 220a and 220b left and right to release capping, and then descends to the printing position. FIG. 2 shows a state in which the print head unit 126 is lowered to the printable position. The conveyance drive energy of the conveyance belt 102 is given by the drive motor 111 and starts to rotate. The conveyance driving energy of the conveyance roller 302, the registration roller 303, and the paper discharge roller 304 is given by another motor (not shown) and starts rotating.

  The recording medium 101 picked up by the pickup roller 102 from the paper feed cassette 100 is conveyed onto a conveyance belt 102 as a printing unit via a conveyance roller 302 and a registration roller 303. At this time, since the conveyance belt 102 is charged by the high voltage power supply unit 103, the recording medium 101 is electrostatically attracted to the conveyance belt 102. The recording medium 101 is printed with ink ejected from the inkjet heads 201 to 206 when passing under the inkjet heads 201 to 206. The recording medium 101 that has passed under the ink jet heads 201 to 206 is separated from the conveying belt 102 by the separation device 129, passes through the paper discharge roller 304, and is then discharged to the back paper discharge tray 132.

  FIG. 3 is a top view of FIGS. 1 and 2. This shows a state in which the recording media 101a and 101b on the conveying belt 102 are conveyed under the inkjet heads 201 to 206 in the conveying direction indicated by the arrows.

  Next, the operation during duplex printing will be described.

  The recording medium 101 printed with ink ejected from the ink jet heads 201 to 206 and passed under the ink jet heads 201 to 206 is conveyed to the double-side reversing mechanism 150 via the separation device 129. In the double-side reversing mechanism 150, the paper is conveyed to the reversing roller 306 through the pre-reversing roller 305. When the trailing edge of the recording medium 101 passes the pre-reverse roller 305, the conveyance of the recording medium 101 is temporarily stopped. The path switching unit 350 switches the conveyance path toward the reverse roller 307. Next, the reverse roller 306 is rotated in the reverse direction before stopping, and the conveyance of the recording medium 101 is resumed. By this operation, the recording medium 101 is reversed. The recording medium 101 is temporarily stopped after being conveyed to the double-sided roller 308. The subsequent transport resumption timing is determined by the interval with the front recording medium 101, and the transport after a predetermined weight is resumed. The recording medium 101 that has resumed conveyance passes through the conveyance roller 302 and the registration roller 303, and is then conveyed again onto the conveyance belt 102. After printing on the back surface, the recording medium 101 is separated from the conveyance belt 102 by the separation device 129, After passing, the paper is discharged to the back surface discharge tray 132.

  Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

  In the embodiments described below, a printer is taken as an example of a recording apparatus using an inkjet recording method.

  In this specification, “printing” means not only the formation of significant information such as characters and figures, but also whether it is manifested so that it can be perceived visually by humans, regardless of significance. Regardless of the case, an image, a pattern, a pattern, or the like is widely formed on a recording medium, or the medium is processed.

  “Recording medium” refers not only to paper used in general recording apparatuses but also widely to cloth, plastic film, metal plate, glass, ceramics, wood, leather, and the like that can accept ink. Shall.

  Further, the term “ink” should be interpreted broadly in the same way as the definition of “recording” described above. When applied to a recording medium, it forms an image, a pattern, a pattern, etc., or processes the recording medium. It represents a liquid that can be subjected to the above processing (for example, coagulation or insolubilization of the colorant in the ink applied to the recording medium).

  A first embodiment according to the present invention will be described.

  FIG. 7 is a schematic configuration diagram according to the first embodiment of the present invention. The difference from the prior art is that the voltage application unit for applying a high voltage to the endless belt 506 having an electrode plate is divided into an adsorption area voltage application unit 501 and a print area voltage application unit 502 so that different voltages can be applied to each. This is the point. A suction roller 503 is arranged above the suction area voltage application unit 501 so that the recording medium 508 can be pressed against the endless belt 506. The print area voltage application unit 502 applies a voltage to the endless belt 506 within a range that can cover the inkjet head 504. The high-voltage power supply 505 has two outputs, and can output voltages having different values. OUT1 is connected to the suction area application voltage unit 501 and OUT2 is connected to the print area application voltage unit 502. The high-voltage power supply 505 is turned on / off by the control device 510 and the output voltage is adjusted.

  FIG. 8 is a top view of FIG. The endless belt 506 is supplied with power by the suction area voltage application unit 501 from the front in the paper conveyance direction, and generates electrostatic suction force by being supplied with the printing area voltage application unit 502. The print areas are arranged in the order of print areas. A suction roller 503 (not shown) is disposed on the suction area, and an inkjet head 504 (not shown) is disposed on the print area.

  Next, the operation will be described.

  When the recording apparatus transitions from the standby state to the print state, the endless belt 506 starts rotating, and at the same time, a voltage is applied from the high voltage power source 505 to the suction area voltage application unit 501 and the print area voltage application unit 502. The applied voltage value is 2 kV applied to the suction area voltage application unit 501 and 0.5 kV is applied to the print area voltage application unit 502. An electric field is generated in the endless belt 506 to which a voltage is applied, and the recording medium can be attracted by electrostatic force. When the recording medium 508 conveyed by the paper feeding means reaches the endless belt 506, the recording medium 508 is first attracted to the endless belt 506 by electrostatic force on the adsorption area voltage application unit 501, and simultaneously the recording medium 508 is The endless belt 506 is brought into close contact with the suction roller 503.

  By bringing the recording medium 508 into close contact with the endless belt 506 by the suction roller 503, it is possible to suppress the phenomenon that the recording medium 508 is floated on the end and the paper is lifted as a result of air entering the endless belt 506. . Further, in comparison with a state in which the recording medium 508 is merely placed on the endless belt 506, the direction in which the recording medium 508 is attracted to the endless belt 506 by applying pressure is perpendicular to the endless belt 506 in the vertical direction. It was confirmed that the force for separating the recording medium 508 was about 1.5 to 2 times stronger. Further, since the adsorption force due to static electricity increases in proportion to the voltage, it is desirable that the voltage applied to the adsorption area voltage application unit 501 be high within a safe range in which problems such as leakage do not occur.

  The recording medium 508 sucked in the suction area is then conveyed into the print area. The recording medium 508 is attracted to the endless belt 506 by the electrostatic force generated by the voltage supplied by the print area voltage application unit 502 in the print area.

  In this way, when the recording medium 508 is stacked on the endless belt 506, the recording medium 508 is lifted up because the recording medium 508 closely adheres to the endless belt 506 by virtue of the synergistic effect of high voltage and pressure. Can be reduced. Further, once adsorbed recording medium 508 does not leave the endless belt instantaneously even when the voltage value decreases in the print area, and passes through the print area while maintaining the adsorbed state in the adsorption area. . Accordingly, a good suction state can be obtained even on the print area, and contact with the ink jet head 504 due to paper floating or the like can be eliminated. In addition, since the voltage in the print area is set low, ink droplets ejected from the inkjet head 504 are reduced from being affected by the electric field, so that the influence on the image can be eliminated.

  Next, a second embodiment according to the present invention will be described.

  FIG. 9 is a schematic configuration diagram according to the second embodiment of the present invention. The difference from the first embodiment of the present invention is that a temperature / humidity detector 520 is newly added.

  Next, the operation will be described.

  The temperature / humidity information detected by the temperature / humidity detection device 520 is sent to the control device 510. The control device 510 determines a voltage value to be supplied to the adsorption area voltage application unit 501 based on the temperature / humidity information, and instructs the high voltage power source 505. The high voltage power source 505 supplies the voltage determined by the control device 510 to the suction area voltage application unit 501.

  Paper, which is a recording medium, generally has a reduced electrostatic attraction in a low humidity environment. Therefore, when the value detected by the temperature / humidity detection device 520 is determined to be a low humidity environment by the control device 510, the voltage value supplied from the high voltage power source 505 to the suction area voltage application unit 501 is increased.

  The low humidity environment is calculated by the control device 510 from the temperature and humidity information, and when the absolute humidity is 5 g / kg or less, it is determined as a low humidity environment. When it is determined that the environment is a low humidity environment, the voltage supplied from the high voltage power source 505 to the suction area voltage application unit 501 is raised to 3 kV.

  In this embodiment, the low humidity environment is set to 5 g / kg as an absolute humidity. In addition, the description has been divided into the normal environment and the low-humidity environment, but it is divided into three or more stages according to the absolute humidity, and the voltage value supplied to the suction area voltage application unit 501 is changed in each of them. Also good.

  Next, a third embodiment according to the present invention will be described.

  The difference from the second embodiment of the present invention is that the voltage determined by the control device 510 is supplied to the print area voltage application unit 502.

  Next, the operation will be described.

  The absolute humidity is calculated by the control device 510 from the temperature / humidity information. When the absolute humidity is 5 g / kg or less, it is determined that the environment is a low humidity environment. If it is determined that the environment is a low humidity environment, the voltage supplied from the high voltage power source 505 to the print area voltage application unit 502 is raised to 1 kV.

  In this embodiment, the low humidity environment is set to 5 g / kg as an absolute humidity. Further, the description has been divided into the normal environment and the low-humidity environment, but it is divided into three or more stages according to the absolute humidity, and the voltage value supplied to the print area voltage application unit 502 is changed in each of them. Also good.

  Next, a fourth embodiment according to the present invention will be described.

  The difference from the second and third embodiments of the present invention is that the voltage determined by the control device 510 is supplied to both the suction area voltage application unit 501 and the print area voltage application unit 502.

  Next, the operation will be described.

  The absolute humidity is calculated by the control device 510 from the temperature / humidity information. When the absolute humidity is 5 g / kg or less, it is determined that the environment is a low humidity environment. When it is determined that the environment is a low humidity environment, the voltage supplied from the high voltage power source 505 to the suction area voltage application unit 501 is increased to 3 kV, and the voltage supplied to the print area voltage application unit 502 is increased to 1 kV.

  In this embodiment, the low humidity environment is set to 5 g / kg as an absolute humidity. Further, although the description has been divided into the normal environment and the low-humidity environment, the voltages supplied to the suction area voltage application unit 501 and the print area voltage application unit 502 are divided into three or more stages according to the absolute humidity. You may comprise so that a value may be changed.

  Next, a fifth embodiment according to the present invention will be described.

  In this embodiment, the voltage supplied from the high-voltage power supply 505 to the suction area voltage application unit 501 is increased during double-sided printing. That is, at the time of double-sided printing, a recording medium that has already been printed on one side is conveyed. An already printed recording medium generally has more curling and cockling than an unprinted recording medium. The voltage to be applied is increased to increase the electrostatic attraction force so that good printing can be performed on such a recording medium.

  Next, the operation will be described.

  The control device 510 instructs the high-voltage power supply 505 to increase the voltage when the recording medium fed from the double-side reversing mechanism 150 has been printed on the back side in the double-sided printing mode in which double-sided printing is performed in the recording device. To do.

  That is, since the recording medium fed from the paper feed cassette 100 is an unprinted one, the voltage supplied from the high voltage power source 505 to the suction area voltage application unit 501 is 2 kV. On the other hand, the recording medium fed from the double-side reversing mechanism 150 has already been printed on one side. When such a recording medium is conveyed, the voltage supplied from the high voltage power source 505 to the suction area voltage application unit 501 is raised to 3 kV.

  In this embodiment, the voltage supplied to the suction area voltage application unit 501 is raised to 2 kV when the single-side printed recording medium fed from the double-side reversing mechanism 150 is conveyed. It may be configured to be raised to 2 kV while is being executed.

  Next, a sixth embodiment according to the present invention will be described.

  In this embodiment, the voltage supplied from the high voltage power source 505 to the print area voltage application unit 502 is increased during double-sided printing.

  Next, the operation will be described.

  Since the recording medium fed from the paper feed cassette 100 is unprinted, the voltage supplied from the high voltage power source 505 to the print area voltage application unit 502 is 0.5 kV. On the other hand, the recording medium fed from the double-side reversing mechanism 150 has already been printed on one side. When such a recording medium is conveyed, the voltage supplied from the high voltage power source 505 to the print area voltage application unit 502 is raised to 1 kV.

  In this embodiment, the voltage supplied to the print area voltage application unit 502 is raised to 1 kV when the single-side printed recording medium fed from the double-side reversing mechanism 150 is conveyed. It may be configured to be raised to 1 kV while is being executed.

  Next, a seventh embodiment according to the present invention will be described.

  In this embodiment, the voltage supplied from the high-voltage power supply 505 to both the suction area voltage application unit 501 and the printing area voltage application unit 502 is increased during double-sided printing.

  Next, the operation will be described.

  Since the recording medium fed from the paper cassette 100 is an unprinted one, the voltage supplied from the high voltage power source 505 to the suction area voltage application unit 501 is 2 kV, and the voltage supplied to the print area voltage application unit 502 is 0.5 kV. On the other hand, the recording medium fed from the double-side reversing mechanism 150 has already been printed on one side. When such a recording medium is conveyed, the voltage supplied from the high voltage power source 505 to the suction area voltage application unit 501 is increased to 3 kV, and the voltage supplied to the print area voltage application unit 502 is increased to 1 kV.

  In this embodiment, when the single-side printed recording medium fed from the double-side reversing mechanism 150 is conveyed, the voltage supplied to the suction area voltage application unit 501 is 3 kV, and is supplied to the print area voltage application unit 502. The voltage is raised to 1 kV, but may be raised while printing is being executed in the duplex printing mode.

It is a block diagram of an inkjet recording device. (Part 1) It is a block diagram of an inkjet recording device. (Part 2) FIG. 3 is a top view of the ink jet recording apparatus transport unit of FIGS. 1 and 2. Explanatory drawing inside a conveyance belt. The figure which looked at the conveyance belt from the top. The positional relationship diagram of the conventional adsorption | suction force generation means, a conveyance belt, and an inkjet head. 1 is a schematic configuration diagram according to a first embodiment. FIG. The top view of an endless belt. The schematic block diagram which concerns on a 2nd Example.

Explanation of symbols

7Y, 7M, 7C, 7K recording device
31 Conveyor belt
32 Transport roller
33 Pinch roller
34 Drive roller
35 Pressure roller
36 Adsorption power generation means
36a electrode plate
36a, 36b Electrode plate
36c Base layer
36d surface
36e Power-supplied member
36e1, 36e2 Powered part
51 Power supply brush
52a, 52b, 52c Feed electrode
53 Support Member 100 Paper Feed Cassette 101 Recording Medium 102 Conveying Belt 103 High Voltage Power Supply Unit 104 Balt Sag Prevention Spring 111 Motor 129 Separator 132 Paper Discharge Tray 200 Head Unit 201 Sixth Head (Yellow)
202 5th head (magenta)
203 4th head (cyan)
204 3rd head (light magenta)
205 2nd head (light cyan)
206 1st head (black)
210 Nozzle 220a Cap 220b Cap 301 Pickup roller 302 Conveying roller 303 Registration roller 304 Paper discharge roller 305 Roller before reverse 306 Reverse roller 307 Roller after reverse 308 Double-sided roller 311 Drive motor 312 Drive roller 313 Belt deflection prevention roller 350 Path switch 501 Adsorption area Voltage application unit 502 Print area voltage application unit 503 Adsorption roller 504 Inkjet head 505 High voltage power source 506 Endless belt 508 Recording medium 510 Control device 520 Temperature / humidity detection device

Claims (4)

Recording of a recording apparatus having an adsorption roller that electrostatically attracts a recording medium by electrostatic force generated by applying a high voltage to an endless belt having a high voltage application electrode and attracts the recording medium to the endless belt In the medium transport device,
An adsorption area power supply unit that applies a high voltage to an area where the recording medium is adsorbed to the endless belt by the adsorption roller, and a print area power supply unit that applies a high voltage to a print area that performs printing on the recording medium A recording medium conveying apparatus of a recording apparatus, wherein a voltage of an area power supply unit is higher than a voltage of a printing area power supply unit.   The recording medium conveying apparatus of the recording apparatus according to claim 1, further comprising a temperature / humidity detection device, wherein the voltage applied to the suction area power feeding unit is adjusted according to the detected temperature / humidity.   3. A recording medium conveying apparatus for a recording apparatus according to claim 1, further comprising a temperature / humidity detection device, wherein the voltage applied to the print area power supply unit is adjusted according to the detected temperature / humidity.   4. A recording medium conveying apparatus for a recording apparatus according to claim 1, further comprising a double-sided reversing device, wherein the applied voltage of the suction area power supply unit is increased during double-sided printing.

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