JP2007145503A - Recording medium carrying device of recorder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable high image quality printing by shortening a distance between a carrier belt and a printer positioned in an upper part, by preventing the carrier belt from floating from a support member, by arranging a space for preventing sealing of air between the carrier belt and the support member (a platen) performing positioning in the height direction in a printing area. <P>SOLUTION: This recording medium carrying device of a recorder has the printer for printing on a recording medium, a carrying means for carrying the recording medium just under the printer and the support member for positioning the carrying means at a predetermined distance to the printer; and is provided for attracting the recording medium by electrostatic force generated from the carrying means and attracting the recording medium by the electrostatic force even to the support member arranged on the opposite side of a surface attracting the recording medium. The recording medium carrying device of the recorder is characterized by constituting a contact surface of the support member with the carrying means out of a curved surface. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a recording medium conveying method of an ink jet recording apparatus, and more particularly to a recording medium conveying apparatus of an ink jet recording apparatus having a plurality of full line type ink jet recording heads having a recording element array corresponding to the width of the recording medium. is there.

  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, a charge is applied to generate an electrostatic force, and the recording medium is attracted to the belt member and recorded while being conveyed 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.

  FIG. 7 is a view of the endless belt as seen from above, and FIG. 8 is a view as seen from a cross section. A platen 320 for positioning the endless belt 102 is provided below the endless belt 102. The surface of the platen 320 is a flat surface, and the endless belt 102 is configured to position the distance from the head unit 200 and keep it parallel. The distance between the surface of the endless belt 102 and the head unit 200 is usually about 1.5 mm, and is reduced to a distance of about 0.5 to 0.7 mm when printing with higher definition. The platen 320 is made of a conductive material, and the endless belt 102 is attracted to the platen 320 by electrostatic force generated from electrodes provided on the endless belt 102. At the time of conveyance, the endless belt 102 slides on the platen 320, and the endless belt 102 is driven so as to always keep flatness without fluttering.

For example, Patent Document 1 and Patent Document 2 can be cited as conventional examples.
JP 2005-247564 A JP 2000-95375 A

  However, when air is mixed between the endless belt 102 and the platen 320 as shown in FIG. 9, the endless belt 102 floats from the platen 320. The float may cause the surface of the endless belt 102 or the recording medium to be conveyed to come into contact with the bottom surface of the head unit 200. This contact causes printing failure, and in the worst case, the ink jet head is destroyed. In particular, when performing high-definition printing, the gap between the endless belt 102 and the head unit 200 is only about 0.5 to 0.7 mm. It becomes.

  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 transport belt itself may be destroyed. Also, if a leak occurs between the endless transport belt and the ink jet head, the ink jet head is also destroyed. To do.

  In addition, since the strength of electrolysis generated around the endless conveyance 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. There was such a problem.

According to a first aspect of the present application, there is provided a printing apparatus for printing on a recording medium, a conveying means for conveying the recording medium immediately below the printing apparatus, and a conveying means positioned at a predetermined distance with respect to the printing apparatus. And a support member provided on the opposite side of the surface that adsorbs the recording medium by applying a voltage to the conveying means and adsorbing the recording medium by electrostatic force generated from the conveying means. In the recording medium transport device of the recording device that is attracted by electrostatic force,
The contact surface of the support member with the conveying means is configured by a curved surface.

  The second invention according to the present application is characterized in that a flat area is provided at the apex portion of the curved surface of the contact surface of the support member with the conveying means.

  A third invention according to the present application is characterized in that a slit is provided on a contact surface of the support member with the conveying means.

  A fourth invention according to the present application is characterized in that a contact surface of the support member with the conveying means is formed in a wedge shape.

  A fifth invention according to the present application is characterized in that a plurality of through holes are provided in the support member.

  A sixth invention according to the present application is characterized in that the groove shape formed on the contact surface of the support member with the conveying means is configured in parallel with the conveying direction.

  The seventh invention according to the present application is characterized in that the groove shape formed on the contact surface of the support member with the conveying means is configured to be orthogonal to the conveying direction.

  An eighth invention according to the present application is characterized in that the groove shape formed on the contact surface of the support member with the conveying means is configured to be inclined with respect to the conveying direction.

  The ninth invention according to the present application is characterized in that the groove shape formed on the contact surface of the support member with the conveying means is configured in both a direction parallel to a direction perpendicular to the conveying direction. .

  According to a tenth aspect of the present invention, the groove shape formed on the contact surface of the support member with the conveying means is formed in both vertical and horizontal directions, and the formed groove shape is inclined with respect to the conveying direction. It is characterized by that.

  According to an eleventh aspect of the present application, a comb-like electrode is embedded in the transport unit, and an adsorption force is generated on the recording medium and the support member by an electrostatic force generated by applying a voltage to the electrode. It is characterized by that.

  According to a twelfth aspect of the present application, the conveying means is constituted by a high resistance member, and generates an attracting force to the recording medium and the support member by an electrostatic force generated by applying a charge to the conveying means by the charge injection means. It is characterized by doing.

  A thirteenth aspect of the present application is characterized in that the shape of any one of claims 1 to 10 is provided on the contact surface of the transport means with the support member.

  As described above, according to the present invention, by forming a groove for discharging air on the back surface of the platen or the conveyance belt, the conveyance belt is lifted from the platen when the conveyance belt is electrostatically adsorbed to the platen. Can be prevented. Accordingly, the conveyance can be performed in a state where the conveyance belt is in close contact with the platen that performs positioning with the head unit, and printing can be performed with the head unit as close as possible to the conveyance belt.

  The closer the head unit is to the conveyor belt, the closer the distance between the head unit and the recording medium to be printed. This shortens the time until the ink droplets ejected from the head unit land on the recording medium, thereby eliminating the displacement of the landing position on the recording medium. Printing without landing position deviation makes it possible to realize high-quality printing particularly with a printer equipped with a full-line type ink jet.

  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 rises once, moves the cap units 220a and 220b to the left and right to cancel 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. 10 is an external view of the platen 320 in the first embodiment according to the present invention. FIG. 11 is an external view of the platen 320 viewed from a cross section. The surface of the platen 320 (contact surface with the conveyor belt 102) is formed of a kamaboko-shaped curved surface, and the pitch is preferably 5 to 50 mm and the depth is 1 mm or less. The material is made of a conductive material, or at least the surface that contacts the conveyor belt 102 is made of a conductive material. As shown in FIGS. 7 and 8, the platen 320 is disposed at a portion located below the head unit 200 so as to contact the back surface of the conveyance belt 102. The arrangement direction is such that the groove formed in the platen 320 is parallel to the conveyance direction of the conveyance belt 102, and the air flow path is formed in the same direction when the conveyance belt 102 rotates.

  At the time of conveyance, the conveyance belt 102 slides on the curved surface of the platen 320. At this time, since a high voltage is applied to the electrodes of the conveyor belt 102, an electrostatic force is generated, and the conveyor belt 102 and the platen 320 are electrostatically adsorbed. At that time, the air mixed between the conveying belt 102 and the platen 320 is discharged to the outside through a groove provided in the platen 320 serving as an air discharge passage. Accordingly, even if air is mixed between the transport belt 102 and the platen 320, the air is discharged to the outside, so that the transport belt 102 and the platen 320 can always be kept in close contact with each other. That is, even in an environment where air is sequentially mixed between the transport belt 102 and the platen 320 as in transport, an air discharge passage is always secured, so that the space between the transport belt 102 and the platen 320 is It is possible to prevent the conveyance belt 102 from floating due to air mixing.

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

  FIG. 12 is an external view of the platen 320 in the second embodiment according to the present invention. FIG. 13 is an external view of the platen 320 viewed from a cross section. The difference from the first embodiment is that the surface shape of the platen 320 is provided with a flat portion from the curved surface to the apex portion of the curved surface. At this time, the width of the flat portion is preferably less than half of the pitch.

  By providing a flat portion at the apex of the platen 320 formed of a curved surface, the contact area between the conveyor belt 102 and the platen 320 increases. As a result, the area that receives the electrostatic force generated from the conveyor belt 102 also increases, so that the conveyor belt 102 and the platen 320 can be more strongly adsorbed, and air can flow between the conveyor belt 102 and the platen 320. Mixing can be prevented.

  In addition, the flatness at the apex height of the platen 320 can be improved by providing a flat portion at the apex of the platen 320 formed of a curved surface. Along with this, the conveyance belt 102 attracted to the platen 320 also learns from this flatness, so that the surface position accuracy of the conveyance belt 102 is also improved.

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

  FIG. 14 is an external view of a platen 320 in the third embodiment according to the present invention. FIG. 15 is an external view of the platen 320 viewed from a cross section. A different point from the said Example is a point which provided the slit-shaped groove | channel on the surface shape of the platen 320 in the plane. At this time, the width of the groove portion is desirably 1 mm or less and the pitch is desirably 10 mm or less.

  By providing slit-like grooves on the flat platen 320, the contact area with the conveyor belt 102 is further increased, the suction force is improved and the flatness is improved, so that the surface position accuracy of the conveyor belt 102 is improved and more stable. Can be realized.

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

  FIG. 16 is an external view of a platen 320 in the fourth embodiment according to the present invention. FIG. 17 is an external view of the platen 320 as viewed from the cross section. The difference from the third embodiment is that the groove provided in the plane of the platen 320 is wedge-shaped. Thus, even if the groove is changed from a slit shape to a wedge shape, the same effect can be obtained.

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

  FIG. 18 is an external view of a platen 320 in the fifth embodiment according to the present invention. FIG. 19 is an external view of the platen 320 as viewed from the cross section. The difference from the above embodiment is that the surface shape of the platen 320 is wedge-shaped. It is desirable that the pitch at this time is 5 to 50 mm and the depth is 1 mm or less.

By forming the surface shape of the platen 320 in a wedge shape, air can be prevented from being mixed between the conveying belt 102 and the platen 320.
A sixth embodiment according to the present invention will be described.

  FIG. 20 is an external view of a platen 320 in the sixth embodiment according to the present invention. The difference from the above embodiment is that an infinite number of through holes are provided in the platen 320. At this time, the interval between the through holes is desirably provided at a pitch of 10 mm or less.

  In the present embodiment, since the air discharge flow path has a through hole in the platen 320, the air mixed between the conveyance belt 102 and the platen 320 moves to the opposite side where the conveyance belt 102 is adsorbed through the through hole. Discharged. That is, when the conveyance belt 102 slides on the curved surface of the platen 320, a high voltage is applied to the electrodes of the conveyance belt 102, so that electrostatic force is generated, and the conveyance belt 102 and the platen 320 are electrostatically charged. Adsorb. At that time, the air mixed between the conveying belt 102 and the platen 320 is discharged to the outside through a through hole provided in the platen 320 as an air discharge passage. Accordingly, even if air is mixed between the transport belt 102 and the platen 320, the air is discharged to the outside, so that the transport belt 102 and the platen 320 can always be kept in close contact with each other.

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

  FIG. 21 is an external view of a platen 320 in the seventh embodiment according to the present invention. FIG. 22 is an external view of the platen 320 as viewed from the cross section. The difference from the above embodiment is that the grooves provided in the plane of the platen 320 are provided so as to run vertically and horizontally. It is desirable that the pitch at this time is 5 to 50 mm and the depth is 1 mm or less.

  By providing slit-like grooves in the planar platen 320 so as to cross vertically and horizontally, it is possible to increase the discharge path of the air mixed between the conveyor belt 102 and the platen 320, so that the conveyor belt 102 and the platen 320 can be further increased. Can be improved and stable conveyance can be realized.

  An eighth embodiment according to the present invention will be described.

  FIG. 23 is a sectional view of the conveyor belt 102 and the platen 320 in the eighth embodiment according to the present invention. The difference from the above embodiment is that an air discharge channel is provided on the back surface of the conveyor belt 102 (the surface in contact with the platen 320). In the present embodiment, it is desirable that the back surface shape of the conveyor belt 102 is a kamaboko-shaped curved surface with a pitch of 5 to 50 mm and a depth of 1 mm or less.

  During conveyance in which the conveyor belt 102 slides on the curved surface of the platen 320, a high voltage is applied to the electrodes of the conveyor belt 102, so that electrostatic force is generated and the conveyor belt 102 and the platen 320 are electrostatically attracted. . At that time, the air mixed between the conveyor belt 102 and the platen 320 is discharged outside by a groove formed by the shape of the back surface of the conveyor belt 102 serving as an air discharge channel. Accordingly, even if air is mixed between the transport belt 102 and the platen 320, the air is discharged to the outside, so that the transport belt 102 and the platen 320 can always be kept in close contact with each other. That is, even in an environment where air is sequentially mixed between the transport belt 102 and the platen 320 as in transport, an air discharge passage is always secured, so that the space between the transport belt 102 and the platen 320 is It is possible to prevent the conveyance belt 102 from floating due to air mixing.

  As another example, the air discharge grooves formed on the platen 320 and the conveyance belt 102 have been shown in parallel with the conveyance direction, but may be formed in a direction perpendicular to the conveyance direction. Further, it can be modified within a range not departing from the gist of the present invention, such as forming in a direction oblique to the transport direction.

  Furthermore, although the example which forms the groove | channel for the air discharge formed in the platen 320 and the conveyance belt 102 in the orthogonal | vertical direction is shown, it does not necessarily need to make a right angle and both have an angle of 90 degrees or less. Oriented grooves may be formed.

  In addition, an example has been shown in which an electrode is provided in the inside of the conveyor belt 102 and an attracting force with the platen 320 is generated by an electrostatic force generated by applying a high voltage, but a conveyor belt made of a high resistance material is used. The present invention can obtain the same effect even in a transport means that is formed and charges the transport belt itself with a charger.

  In the present invention, the shape of the grooves formed on the platen 320 and the conveyor belt 102 is assumed to be a high-speed office printer. Therefore, even if the dimensions are changed depending on the conveyance speed, the size of the recording medium, and the type of the recording medium, the same effect can be obtained.

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. It is explanatory drawing inside a conveyance belt. It is the figure which looked at the conveyance belt from the top. It is a positional relationship diagram of a conventional suction force generating means, a conveyor belt, and an inkjet head. It is the figure which looked at the endless belt from the upper surface. It is the figure which looked at the endless belt from the section. (Part 1) It is the figure which looked at the endless belt from the section. (Part 2) 1 is an external view of a platen in a first embodiment according to the present invention. It is a platen sectional view in the 1st example concerning the present invention. It is an external view of the platen in the 2nd example concerning the present invention. It is a platen sectional view in the 2nd example concerning the present invention. It is an external view of the platen in the 3rd example concerning the present invention. It is a platen sectional view in the 3rd example concerning the present invention. It is an external view of the platen in the 4th example concerning the present invention. It is platen sectional drawing in the 4th Example based on this invention. It is an external view of the platen in the 5th example concerning the present invention. It is platen sectional drawing in the 5th Example based on this invention. It is an external view of the platen in the 6th example concerning the present invention. It is an external view of the platen in the 7th example concerning the present invention. It is a platen sectional view in the 7th example concerning the present invention. It is an external view of the platen in the 8th example concerning the present invention.

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 320 Platen 350 Path switch

Claims (13)

A printing apparatus for printing on a recording medium; a conveying means for conveying the recording medium directly under the printing apparatus; and a support member for positioning the conveying means at a predetermined distance with respect to the printing apparatus, A voltage is applied to the conveying means, and the recording medium is adsorbed by the electrostatic force generated from the conveying means, and the recording member is also adsorbed by the electrostatic force to the support member provided on the side opposite to the surface that adsorbs the recording medium. In the recording medium transport device of the apparatus,
A recording medium conveying apparatus of a recording apparatus, wherein the contact surface of the supporting member with the conveying means is a curved surface.   2. A recording medium conveying apparatus of a recording apparatus according to claim 1, wherein a flat area is provided at the apex of the curved surface of the contact surface of the supporting member with the conveying means.   2. A recording medium conveying apparatus of a recording apparatus according to claim 1, wherein a slit is provided on a contact surface of the supporting member with the conveying means.   2. A recording medium conveying apparatus for a recording apparatus according to claim 1, wherein a contact surface of the supporting member with the conveying means is formed in a wedge shape.   2. A recording medium conveying apparatus for a recording apparatus according to claim 1, wherein the supporting member is provided with a plurality of through holes.   5. A recording medium conveying apparatus for a recording apparatus according to claim 1, wherein the groove formed on the contact surface of the supporting member with the conveying means is formed in parallel with the conveying direction.   5. A recording medium conveying apparatus for a recording apparatus according to claim 1, wherein the groove formed on the contact surface of the supporting member with the conveying means is formed in a shape perpendicular to the conveying direction.   5. A recording medium conveying apparatus for a recording apparatus according to claim 1, wherein the groove formed on the contact surface of the supporting member with the conveying means is formed obliquely to the conveying direction.   5. The recording apparatus according to claim 1, wherein a groove shape formed on a contact surface of the support member with the conveying unit is configured in both a direction parallel to a direction orthogonal to the conveying direction. Recording medium transport device.   The groove shape formed on the contact surface of the support member with the conveying means is formed in both vertical and horizontal directions, and the formed groove shape is configured to be inclined with respect to the conveying direction. 5. A recording medium conveying device of the recording device according to claim 4.   11. A comb-like electrode is embedded in the transport means, and an attracting force is generated with respect to the recording medium and the support member by an electrostatic force generated by applying a voltage to the electrode. A recording medium conveying apparatus of the recording apparatus.   2. The conveying means is constituted by a high resistance member, and generates an attracting force to the recording medium and the support member by an electrostatic force generated by applying an electric charge to the conveying means by the charge injection means. 10. A recording medium conveying apparatus of the recording apparatus according to 10.   11. A recording medium conveying apparatus for a recording apparatus, wherein a shape of any one of claims 1 to 10 is provided on a contact surface of the conveying means with the support member.

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