JP2007118441A - Inkjet recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ink jet recording apparatus combined with dye ink and pigment ink, in which a recording apparatus main body can perform optimum recording head maintenance corresponding to the ink type by simply replacing the ink without requiring any special work by the user. To do.
SOLUTION: An ink type sensor detects whether an installed ink tank is filled with dye ink or pigment ink, and performs optimum suction recovery for each ink type. The configuration.
[Selection] Figure 1

Description

  The present invention relates to a head recovery device and a head recovery method of a recording means having an ink discharge port for discharging ink, and an ink jet recording apparatus for performing the head recovery. More specifically, the present invention relates to a suction recovery device for removing unnecessary ink and the like from a recording head that ejects ink.

  Recording devices with functions such as printers, copiers, facsimiles, etc., or recording devices used as output devices such as composite electronic devices including computers and word processors and workstations, paper, cloth, plastic sheets based on recorded information An image (including characters and symbols) is recorded on a recording material (recording medium) such as an OHP sheet. Among them, an ink jet recording apparatus (ink jet recording apparatus) performs recording by ejecting ink from a recording means (recording head) to a recording material, and the recording means can be easily made compact and has high definition. Images can be recorded at high speed, can be recorded on special paper without requiring special processing, running cost is low, non-impact method is low noise, and many types of ink (for example, For example, it is easy to record a color image using a color ink.

  As an energy generating element that generates energy used for discharging ink from the discharge port of an ink jet recording head, an element that uses an electromechanical transducer such as a piezo element, or an electromagnetic wave such as a laser is irradiated to generate heat. There are those that eject ink droplets by a heat generating action, and those that heat a liquid by an electrothermal converter having a heating resistor. Among them, an ink jet recording means (recording head) that discharges ink as droplets using thermal energy can perform high-resolution recording because the discharge ports can be arranged at high density. In particular, a recording head using an electrothermal transducer element as an energy generating element is easy to miniaturize, and IC technology and micro-machining technology with remarkable progress in technology and improvement in reliability in recent semiconductor fields. This is advantageous because it can fully utilize these advantages, can be easily mounted at high density, and is inexpensive to manufacture.

  In addition, there are various requirements for the material of the recording material, and in recent years, development for these requirements has progressed, and paper (including thin paper and processed paper) and thin resin plates (OHP, etc.) that are ordinary recording materials. In addition to the above, a recording apparatus using cloth, leather, non-woven fabric, metal, or the like as a recording material is also used.

  The recording apparatus includes a serial type recording apparatus that performs recording while performing main scanning in the direction crossing the conveyance direction of the recording paper (recording material) and a range of a predetermined width (including the entire width) in the width direction of the recording paper. It can be roughly classified into a line type recording apparatus that records using a recording head having a predetermined length held at a fixed position so as to cover. The present invention can be applied to any type of recording apparatus including these recording methods. In the above-described serial type ink jet recording apparatus, an image (including characters and symbols) is usually recorded by a recording head mounted on a carriage that moves along the recording paper after the recording paper is set at a predetermined recording position. An image is formed on the recording paper by executing a predetermined amount of paper feeding (sub-scanning).

  In the above-described ink jet recording apparatus, foreign matters such as ink droplets, dust, dust, and paper dust may adhere to the head surface of the recording head due to the recording operation, and the head surface is cleaned by a cleaning member in order to remove these foreign matters. (For example, wiping by rubbing) is performed. As the cleaning member, a flexible member such as a rubber blade made of a rubber-like elastic material is usually used. Also, the ink near the discharge port of the recording head dries, and the discharge port may become clogged due to thickening, fixing, and accumulation of ink. Furthermore, clogging of the discharge port may occur due to bubbles or dust generated inside the discharge port (liquid passage). As a method for recovering (preventing, eliminating, etc.) these clogs, for example, a capping member is used to form a sealed system at the ink discharge port, and a pump is used to form a predetermined negative pressure on the discharge port surface (head surface). A suction recovery method is adopted in which ink is forcibly discharged from the ejection port by generating a pressure suction force. In order to remove ink adhering to the head surface by suction recovery, the head surface is also cleaned (wiped off) by a cleaning member.

  Also, as inks used in these ink jet recording apparatuses, conventionally, those using water-based dye inks have been mainstream, but dye inks are effective in terms of vividness, but dye molecules are small. Therefore, so-called weather resistance such as light resistance and gas resistance is insufficient, and there is a problem that the color of the recorded matter changes with time. In recent years, therefore, water-based pigment inks have been put into practical use in place of water-based dye inks. Currently used pigment inks have a pigment particle size of about 100 nm, which is much larger than dye molecules, so even if they are affected by light or ozone, the colorant fading is not noticeable and the weather resistance is Much better than dye inks. However, it is inferior in vividness compared to dye ink.

  As described above, the use of the ink jet recording apparatus is further expanded by taking advantage of the characteristics of the dye ink and the pigment ink and properly using the ink in accordance with the preference such as the hue preference by the user and the characteristics of the recording material.

As an ink jet recording apparatus combined with a dye and a pigment in consideration of the difference in characteristics depending on the ink type as described above, an apparatus disclosed in the following patent document has been proposed.
JP 2003-200582 A JP 2003-205619 A

  However, the above conventional example has the following problems.

  (1) In the disclosed configuration, there is no mention about suction recovery, and therefore, when the same print head is used and dye ink and pigment ink are used separately, the dye ink and pigment ink have different material properties such as viscosity. For this reason, if the suction parameters such as the suction speed and the suction acceleration are the same, the optimum recording head maintenance cannot be performed.

  (2) When the user sets whether the ink attached to the main body is dye ink or pigment ink, the recovery of suction can be performed with incorrect control due to operation mistakes and complicated operation methods. If this is done, not only the maintenance of the optimum recording head cannot be performed, but also the recording head may be damaged.

  SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and an object of the present invention is to provide a dye ink and a pigment ink capable of performing optimum recording head maintenance suitable for the ink type in the recording apparatus main body with a simple configuration and control. A combined inkjet recording apparatus can be provided.

  By forming a sealed system using a capping member on the discharge port surface (head surface) of the recording head having a discharge port for discharging ink and generating a predetermined negative pressure suction force on the discharge port surface An ink jet recording apparatus that performs suction recovery by forcibly discharging ink from an ejection port, and has a sensing unit that determines whether the ink mounted on the recording apparatus is dye ink or pigment ink, The suction recovery control suitable for each ink type is performed.

  In the suction recovery control, the suction pressure when the pigment ink is used is higher than when the dye ink is used.

  In the suction recovery control, the time to reach the maximum negative pressure when using pigment ink is made faster than when using dye ink.

  The ink type discrimination means issues a warning when an incorrect combination of ink tanks is installed.

  The present invention has the following effects.

  To provide an ink jet recording apparatus for dye ink and pigment ink, which does not require any special work by the user, and allows the recording apparatus main body to perform optimum recording head maintenance corresponding to the ink type by simply replacing the ink. it can.

  Next, details of the present invention will be described in accordance with the description of the embodiments.

  An embodiment of the present invention will be described with reference to FIGS. 1 and 2 are perspective views of a recording apparatus according to an embodiment of the present invention, FIGS. 3 and 4 are perspective views of a mechanism portion of the recording apparatus according to an embodiment of the present invention, and FIG. 5 is a cross-sectional view according to the embodiment of the present invention. 6 to 7 are diagrams relating to recording head maintenance.

  The recording apparatus 1 of the present invention includes a paper feeding device 2, a paper feeding unit 3, a paper discharging unit 4, a carriage unit 5, a cleaning unit 6, a recording head 7, and an electrical unit 5. Then, these are divided into items and the outline is described sequentially.

(A) Paper Feed Unit The paper feed unit 2 returns the pressure plate 21 on which the sheet material P is stacked, the paper feed roller 28 that feeds the sheet material P, the separation roller 241 that separates the sheet material P, and the sheet material P to the stacking position. Therefore, the return lever 22 and the like are attached to the base 20.

  A paper feed tray 26 for holding the stacked sheet material P is attached to the base 20 or the exterior. The paper feed tray 26 is a multi-stage type and is pulled out for use.

  The paper feed roller 28 has a bar shape with a circular arc in cross section. One separation roller rubber is provided based on the paper standard, thereby feeding the sheet material. Driving to the paper feed roller 28 is transmitted from a dedicated paper feed motor 273 provided in the paper feed unit 2 by a drive transmission gear 271 and a planetary gear 272.

  A movable side guide 23 is movably provided on the pressure plate 21 to regulate the stacking position of the sheet material P. The pressure plate 21 can rotate about a rotation shaft coupled to the base 20 and is urged by the pressure plate spring 212 to the paper feed roller 28. A separation sheet 213 made of a material having a large coefficient of friction such as an artificial leather that prevents double feeding of the sheet material P near the end of the stack is provided at a portion of the pressure plate 21 that faces the sheet feeding roller 28. The pressure plate 21 is configured to be able to contact and separate from the paper feed roller 28 by a pressure plate cam 241.

  Further, a separation roller holder 24 attached with a separation roller 241 for separating the sheet material P one by one on the base 20 is rotatable about a rotation shaft provided on the separation base 20, and is separated by a separation roller spring 242. It is urged by the paper feed roller 28. The separation roller 241 has a configuration in which a clutch spring 243 is attached, and a portion to which the separation roller 241 is attached can rotate when a load exceeding a predetermined value is applied. The separation roller 241 can be brought into contact with and separated from the paper feed roller 28 by a separation roller release shaft 242 and a control cam 25. The positions of the pressure plate 21, the return lever 22, and the separation roller 241 are detected by the ASF sensor 29.

  A return lever 25 for returning the sheet material P to the stacking position is rotatably attached to the base 20 and is urged by a return lever spring 221 in the release direction. When the sheet material P is returned, it is configured to rotate by the control cam 25.

  A state of feeding paper using the above configuration will be described below.

  In a normal standby state, the pressure plate 28 is released by the pressure plate cam 214, the separation roller 241 is released by the control cam 25, and the return lever 22 returns the sheet material P so that the sheet material P does not enter the back during loading. It is provided at a loading position that closes the loading port. When paper feeding starts from this state, first, the separation roller 241 contacts the paper feeding roller 28 by driving the motor. Then, the return lever 22 is released, and the pressure plate 21 comes into contact with the paper feed roller 28. In this state, feeding of the sheet material P is started. The sheet material P is limited by the pre-stage separation unit 201 provided on the base 20, and only a predetermined number of the sheet material P is sent to the nip portion composed of the paper feed roller 28 and the separation roller 241. The fed sheet material P is separated at the nip portion, and only the uppermost sheet material P is conveyed.

  When the sheet material P reaches a conveyance roller 36 and a pinch roller 37 described later, the pressure plate 21 is released by the pressure plate cam 213 and the separation roller 28 is released by the control cam 25. The return lever 22 is returned to the loading position by the control cam 25. At this time, the sheet material P that has reached the nip portion constituted by the paper feed roller 28 and the separation roller 241 can be returned to the stacking position.

(B) Paper feeding part The paper feeding part 3 is attached to the chassis 11 made of a bent metal sheet. The paper feeding unit 3 includes a conveyance roller 36 that conveys the sheet material P and a PE sensor 32. The transport roller 36 has a structure in which the surface of the metal shaft is coated with ceramic fine particles, and the metal portions of both shafts are received by the bearing 38 and attached to the chassis 11. A conveyance roller tension spring 381 is provided between the bearing 38 and the conveyance roller 36 in order to apply a load during rotation to the conveyance roller 36 to perform stable conveyance, and a predetermined load is applied by urging the conveyance roller 36. Giving.

  The conveyance roller 36 is provided with a plurality of driven pinch rollers 37 in contact therewith. The pinch roller 37 is held by the pinch roller holder 30 and is urged by the pinch roller spring 31, so that the pinch roller 37 is in pressure contact with the transport roller 36 and generates the transport force of the sheet material P. At this time, the rotating shaft of the pinch roller holder 30 is attached to the bearing of the chassis 8 and rotates around the shaft. Further, a paper guide flapper 33 and a platen 34 for guiding the sheet material P are disposed at the entrance of the sheet feeding unit 3 to which the sheet material P is conveyed. Further, the pinch roller holder 30 is provided with a PE sensor lever 321 that transmits detection of the leading edge and trailing edge of the sheet P to the PE sensor 32. The platen 34 is attached to the chassis 11 and positioned. The paper guide flapper 33 engages with the transport roller 36 and can rotate around a bearing portion 331 that slides, and is positioned by contacting the chassis 11.

  Further, a paper presser 341 that covers an end portion of the sheet material P is provided on the paper reference side of the platen 34. Thus, the end portion of the sheet material P that has been deformed or curled is also lifted so that it does not interfere with the carriage 50 or the recording head 7. Furthermore, a recording head 7 that forms an image based on image information is provided on the downstream side of the conveying roller 36 in the sheet material conveying direction.

  In the above configuration, the sheet material P sent to the paper feeding unit 3 is guided by the pinch roller holder 30 and the paper guide flapper 33 and sent to the roller pair of the transport roller 36 and the pinch roller 37. At this time, the leading edge of the sheet material P conveyed by the PE sensor-lever 35 is detected, and thereby the printing position of the sheet material P is obtained. Further, the sheet material P is conveyed on the platen 34 by the roller pair 36 and 37 being rotated by the conveyance motor 35. On the platen 34, a rib serving as a conveyance reference surface is formed. The gap with the recording head 7 is managed, and the sheet material P is struck in combination with a later-described paper discharge unit. And, it is configured so that the smashing does not become large.

  The drive to the transport roller 36 is transmitted to the pulley 361 provided on the shaft of the transport roller 36 by the timing belt 351 by the timing belt 351. Further, a code wheel 362 on which markings are formed at a pitch of 150 to 300 lpi for detecting a conveyance amount by the conveyance roller 36 is provided on the axis of the conveyance roller 36, and an encoder sensor 363 that reads the code wheel 362 is a code wheel. It is attached to the chassis 11 at the position 362 adjacent thereto.

  The recording head 7 is an ink jet recording head equipped with a replaceable ink tank for each color ink tank. The recording head 7 can apply heat to the ink by a heater or the like. Then, the film of the ink is boiled by this heat, and the ink is ejected from the nozzle 70 of the recording head 7 by the pressure change caused by the growth or contraction of the bubbles due to the film boiling, and an image is formed on the sheet material P.

(C) Carriage unit The carriage unit 5 includes a carriage 50 to which the recording head 7 is attached. The carriage 50 is held by a guide shaft 52 for reciprocating scanning in a direction perpendicular to the conveying direction of the sheet material P, and a guide rail 111 that maintains the gap between the recording head 7 and the sheet material P by holding the rear end of the carriage 50. It is supported. The guide shaft 52 is attached to the chassis 11. The guide rail 111 is formed integrally with the chassis 11. A thin sliding sheet 53 of SUS or the like is stretched on the side of the guide rail 111 that slides with the carriage 50 to reduce sliding noise.

  The carriage 50 is driven via a timing belt 541 by a carriage motor 54 attached to the chassis 11. The timing belt 541 is stretched and supported by an idle pulley 542. The timing belt 542 is coupled to the carriage 50 via a damper 55 made of rubber or the like, and reduces image unevenness by attenuating vibration of the carriage motor 54 or the like. A code strip 561 in which markings are formed at a pitch of 150 to 300 lpi for detecting the position of the carriage 50 is provided in parallel with the timing belt 541. Further, an encoder sensor 56 for reading it is provided on a carriage substrate 92 mounted on the carriage 50. The carriage substrate 92 is also provided with contacts 921 for electrical connection with the recording head 7. Further, the carriage 50 is provided with a flexible substrate 57 for transmitting a recording head 7 head signal from the electric substrate 9.

  In order to fix the recording head 7 to the carriage 50, the carriage 50 is provided with pressing means 511 for pressing and fixing the abutting portion 501 for positioning. The pressing means 511 is mounted on the head set lever 51 and is configured to act on the recording head 7 when the head set lever 51 is turned around the rotation fulcrum and set.

  Further, eccentric cams 521 are provided at both ends of the guide shaft 52, and the guide shaft 52 is moved up and down by transmitting the drive to the eccentric cam 521 through the gear train 591 by driving the carriage lifting motor 59. be able to. As a result, the carriage 50 can be moved up and down to form an optimum gap for the sheet material P having different thicknesses.

  The carriage 50 is further provided with an ink type sensor 59 that can determine whether the installed ink tank 71 is filled with dye ink or pigment ink. The ink type sensor 59 is not particularly limited, and a barcode capable of discriminating the ink type is attached to the ink tank 71. When the ink tank 71 is mounted on the carriage 50, the barcode is read to determine the ink type. It is possible to adopt a form in which a chip for discriminating or a chip storing the ink type is incorporated in the ink tank 71 and read when mounted on the carriage 50 in the same manner as described above, and is limited to the configuration of this embodiment. Not a thing.

  In the above configuration, when an image is formed on the sheet material P, the roller pairs 36 and 37 convey the sheet material P to the row position (position in the conveyance direction of the sheet material P) where the image is formed and the carriage 50 is moved by the carriage motor 80. The recording head 7 is moved to the row position for image formation (a position perpendicular to the conveying direction of the sheet material P), and the recording head 7 is opposed to the image formation position. Thereafter, the recording head 7 ejects ink toward the sheet material P by a signal from the electric substrate 9 to form an image.

(D) Paper Discharge Unit The paper discharge unit 4 includes two paper discharge rollers 40 and 41, paper discharge rollers 40 and 41 that are configured to contact each other with a predetermined pressure, and can be rotated by being driven. Is composed of a gear train for transmitting the driving of the paper discharge rollers 40 and 41, and the like.

  The paper discharge rollers 40 and 41 are attached to the platen 34. The upstream discharge roller 40 is provided with a plurality of rubber portions 401 on a metal shaft. The drive from the transport roller is driven by being transmitted to the paper discharge roller 40 via the idler gear. The paper discharge roller 41 has a structure in which a plurality of elastomer elastic bodies 411 are attached to a resin shaft. Drive to the paper discharge roller 41 is transmitted from the paper discharge roller 40 via an idler gear.

  The spur 42 is a SUS thin plate provided with a plurality of convex shapes around the spur 42 and is integrally molded with the resin portion and attached to the spur holder 43. A spur spring 44 provided with a coil spring in a rod shape causes the spur 42 to be attached to the spur holder 43 and pressed against the discharge rollers 40 and 41 and the like. A spur is provided at a position corresponding to the rubber portion and the elastic body portion of the paper discharge rollers 40 and 41, and mainly serves to generate the conveying force of the sheet material P, and the rubber of the paper discharge rollers 40 and 41 therebetween. The portion 401 and the elastic body portion 411 are provided at positions where the sheet body P is not provided, and mainly serves to suppress lifting when the sheet material P is printed.

  By lifting both ends of the sheet material P between the discharge rollers 40 and 41, holding the sheet material P at the tip of the discharge rollers 40 and 41, and rubbing the print on the previous sheet material P. A paper edge support 45 is provided to prevent damage. A resin member provided with a roller 451 at the tip is urged by a paper end support spring 452, and by pressing the roller 451 against the sheet material P with a predetermined pressure, the both ends of the sheet material P are lifted to create a strain, It is configured so that it can be held.

  With the above configuration, the sheet material P on which an image is formed by the carriage unit 5 is sandwiched by the nip between the paper discharge roller 41 and the spur 42, conveyed, and discharged to the paper discharge tray 46. The paper discharge tray 46 is divided into a plurality of parts and can be stored in a lower part of a lower case 99 described later. When used, pull out. The discharge tray 46 increases in height toward the leading end, and the both ends thereof are configured to be high in height, thereby improving the stackability of the discharged sheet material P and preventing the printing surface from being rubbed.

(E) Cleaning unit The cleaning unit 6 includes a pump 60 for cleaning the recording head 7, a cap 61 for suppressing the drying of the recording head 7, a blade 62 for cleaning the face surface around the nozzles of the recording head 7, and the like. It is composed of

  A one-way clutch 691 is provided to have a dedicated cleaning motor 69 so that the pump is operated by rotation in one direction, and the blade 62 operation and the cap 61 elevating operation are operated by rotation in another direction.

  The pump 60 is configured to generate a negative pressure by squeezing two tubes 67 with a pump roller 68, and is connected from the cap 61 to the pump 60 through a valve 65 or the like. When the pump 60 is operated with the cap 61 in close contact with the recording head 7, unnecessary ink or the like is sucked from the recording head 7. A cap absorber 611 is provided in the cap 61 portion in order to reduce ink remaining on the face surface of the head 7 after suction. For this reason, the ink remaining in the cap 61 is sucked in a state where the cap 61 is opened so that the ink remains stuck and does not cause any harmful effects. The waste ink sucked by the pump 60 is absorbed and held in a waste ink absorber 991 provided in a lower case 99 described later.

  A series of operations such as the blade 62 operation, the cap 61 elevating operation, and the opening and closing of the valve 65 are controlled by a main cam 63 provided with a plurality of cams on the shaft. The cam and arm of each part are acted on the main cam to perform a predetermined operation. The position of the main cam 63 can be detected by a position detection sensor 64 such as a photo interrupter. When the cap 61 descends, the blade 62 moves perpendicularly to the scanning direction of the carriage 5 to clean the face surface of the recording head 7. A plurality of blades 62 are provided for cleaning the vicinity of the nozzles of the recording head 7 and for cleaning the entire face surface. Then, when it moves to the innermost position, it can come into contact with the blade cleaner 66 to remove ink or the like adhering to the blade 62 itself.

  Next, details of the suction recovery control when the dye ink and the pigment ink according to the present invention are used will be described.

  (C) As described in the carriage section, when the ink tank 71 is mounted on the carriage 50, the ink type filled in the ink tank 71 by the ink type sensor 59 is a dye ink or a pigment ink. Determine if it exists. In this embodiment, the suction recovery control optimum for the ink type is described, and thus detailed description thereof will be omitted. However, when the dye ink and the pigment ink are mixed during the mounting operation, a warning control may be performed. good.

  This ink type discrimination is always stored while the printing apparatus main body is turned on, and sensing is always performed when the ink tank 71 is replaced and when the printing apparatus main body is turned on.

  The suction recovery operation is performed when the user instructs the suction recovery operation by pressing the key switch 982 or sending a command command from a PC or the like, or by a timer suction command programmed in advance in the main body of the recording apparatus. In this case, the flow is as shown in FIG.

  First, it is determined whether or not to shift to the suction operation by the ink type determination stored in advance. If the ink tank 71 mounted on the carriage 50 is filled with dye ink, dye ink suction is performed, and if the ink tank 71 is filled with pigment ink, the process shifts to pigment ink suction.

  In the ink type suction of the present embodiment, as shown in FIG. 7, control is performed such that the suction pressure when using pigment ink is higher than when using dye ink. This is because the dye ink and the pigment ink have different ink viscosities, and the same suction pressure results in insufficient suction pressure for the pigment ink, and the desired amount of ink cannot be sucked with the pigment ink. . In this embodiment, control is performed so that the maximum negative pressure during suction is 0.3 atm for dye ink suction and the maximum negative pressure during suction is 0.4 atm for pigment ink suction. More specifically, the rotational speed of the cleaning motor 69 is controlled to a rotational speed at which the negative pressure is generated, and the pump roller 68 adjusts the speed of squeezing the two tubes 67.

  In addition, control is performed to increase the time to reach the maximum negative pressure (suction acceleration time) when pigment ink is used than when dye ink is used. This is because, if the suction acceleration time of the dye ink is set to that of the pigment ink having a high viscosity, a sudden negative pressure is applied, so that a satisfactory suction recovery cannot be performed due to the generation of voids in the tube. The suction acceleration is also controlled by controlling the rotational acceleration and acceleration time of the cleaning motor 69 as described above.

  On the other hand, if the user installed the ink tank 71 by mixing dye ink and pigment ink by mistake or aiming for special colors, etc., the LED guide 982 is blinked, or on the PC monitor. Inform the user by displaying a warning message, etc. Thereafter, in order to protect the recording head 7, in the case where dye ink / pigment ink is mixed, the suction recovery operation and printing cannot be performed, and control for prompting the user to replace the ink tank 71 may be performed. In the present embodiment, it is assumed that suction recovery can be performed in the form of a special suction operation after issuing a warning.

  This special suction recovery operation can be performed in accordance with either dye ink suction or pigment ink suction (for example, the ink type with the larger proportion of the mixed ink), or the middle of dye ink suction or pigment ink suction. It may be suction.

  With the configuration and operation described above, the user can perform optimum recording head maintenance in accordance with the ink type by simply replacing the ink.

The perspective view of the recording device in the Example of this invention The perspective view of the recording device in the Example of this invention The perspective view of the mechanism part of the recording device in the Example of this invention The perspective view of the mechanism part of the recording device in the Example of this invention Sectional drawing of the recording device in the Example of this invention The figure explaining the suction recovery control flow at the time of using respectively the dye ink and the pigment ink in the Example of this invention The figure explaining the suction control for every ink kind in the Example of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Recording device 2 Paper feeding device 3 Paper feeding part 4 Paper discharge part 5 Carriage part 6 Cleaning part 7 Recording head 11 Chassis 111 Guide rail 20 Base
201 Preliminary separation part 21 Pressure plate 211 Knurling part 212 Pressure plate spring 213 Separation sheet 214 Pressure plate cam 22 Return lever 221 Return lever spring 23 Movable side guide 231 Sheet guide part 232 Knurling part 233 Operation part 24 Separation roller holder 241 Separation roller 242 Separation roller spring 243 Separation roller clutch 244 Separation roller release shaft 245 Separation roller shaft 25 Control cam 26 Feed tray 27 Drive unit 271 Drive transmission gear 272 Planetary gear 273 Feed motor 28 Feed roller 281 Feed roller rubber 29 ASF sensor 30 Pinch roller holder 31 Pinch roller spring 32 PE sensor 321 PE sensor lever 33 Paper guide flapper 331 Bearing 34 Latin 341 Paper press 342 Conveying roller mounting section 343 Chassis mounting shaft 344 Tray guide detection sensor 35 Conveying motor 36 Conveying roller 361 Pulley 362 Code wheel 37 Pinch roller 38 Bearing 381 Roller tension spring 39 Encoder sensor 40 Discharging roller 1
41 Paper discharge roller 2
42 Spur
43 spur holder 44 spur spring 45 paper end support 451 paper end support roller 452 paper end support spring 46 paper discharge tray 50 carriage 501 abutting portion 51 head set lever 511 head pressing means 52 guide shaft 521 eccentric cam 53 sliding sheet 54 carriage Motor 541 Timing belt 542 Idle pulley 55 Carriage damper 56 Encoder sensor 561 Code strip 57 Flexible substrate
58 Carriage lift motor 581 Drive gear train 59 Ink type sensor 60 Pump 61 Cap 611 Cap absorber 62 Blade 63 Main cam 64 Position detection sensor 65 Valve 66 Blade cleaner 67 Tube 68 Pump roller 69 Cleaning motor 691 One-way clutch 7 Recording head 71 Ink tank 92 Carriage board 981 Door switch lever 982 LED guide 983 Key switch 99 Lower case 991 Waste ink absorber

Claims (4)

A recording head having an ejection port for ejecting ink and a capping member is formed on the ejection port surface (head face surface) of the recording head to generate a predetermined negative pressure suction force on the ejection port surface. An ink jet recording apparatus that performs suction recovery by forcibly discharging ink from an ejection port,
An ink jet recording apparatus comprising a sense unit for determining whether ink mounted on a recording apparatus is dye ink or pigment ink, and performing optimum suction recovery control for each ink type.   2. The ink jet recording apparatus according to claim 1, wherein in the suction recovery control, control is performed so as to increase suction pressure when pigment ink is used rather than when dye ink is used.   3. The ink jet recording apparatus according to claim 1, wherein, in the suction recovery control, the time to reach the maximum negative pressure when using the pigment ink is made faster than when using the dye ink. 4.   4. The ink jet recording apparatus according to claim 1, wherein the ink type discrimination means issues a warning when an incorrect combination of ink tanks is mounted.

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