JP2007007921A - Inkjet recorder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve an inkjet recorder mounting a recovery device satisfying a pressure generation performance stably without causing cost increase due to extra components in the arrangement of a one wind tube pump. <P>SOLUTION: A one wind tube pump mechanism is secured to the pump base opening section on the inlet side or the outlet side of a tube creeping about in the pump base to satisfy a relation A≤T, where (A) is the distance from the outer circumferential end of tube diameter on the adjoining side of a one wind tube to the end of opening of the pump base and T is the thickness of the tube. The tube pump mechanism can be constituted for a plurality of kinds of tube having different inside and outside diameters. In the arrangement corresponding to the plurality of kinds of tube, following relation is satisfied; A≤Tmin (Tmin=minimum tube thickness of the plurality of kinds of tube). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an ink jet recording apparatus that performs recording by discharging ink from a recording unit to a recording material.

  An ink jet recording apparatus (ink jet recording apparatus) performs recording by ejecting ink from a recording means (recording head) to a recording material (hereinafter referred to as a sheet material), and it is easy to make the recording means compact. High-definition images can be recorded at high speed, and can be recorded on plain paper without the need for special processing, running costs are low, non-impact method reduces noise, and multicolor ink It has the advantage that it is easy to record a color image using

  A recording head used in an ink jet recording apparatus has a flow path from an ink storage unit (ink tank unit) to an ink discharge unit, and ink is sequentially supplied from the ink storage unit to the ink discharge unit each time ink is discharged. Come. In a recording apparatus using such a recording head, when the ink in the ink tank runs out by performing recording, the ink tank is newly replaced, and the flow path to the ink ejection unit is refilled with ink, or Cleaning mechanism (recovery) for cleaning the recording head for the purpose of stabilizing the ink ejection operation and obtaining good image quality when removing (cleaning) fixed ink, dust, bubbles, or other foreign matter in the vicinity of the ink ejection opening It is a common practice to install a mechanism unit.

This cleaning mechanism has mainly two functions. One is a wiping mechanism for wiping off dust and ink droplets adhering to the ink discharge port (hereinafter also referred to as nozzle) formation surface. A blade formed in a plate shape with urethane rubber or the like is applied to the nozzle. This is carried out by relative movement in the contacted state. The other is a means for eliminating clogging caused by ink sticking in the nozzle. For example, a negative pressure generated by a negative pressure generating mechanism is applied to the nozzle from the outside to forcibly eject the ink from the nozzle. Is to be implemented.
JP 2004-92602 A

  However, the clogging eliminating means in the conventional example has the following problems.

  As a pressure generating means constituting the clogging prevention / eliminating means, a tube pump is generally widely used because of the convenience that the generated pressure can be freely set. Among them, the single-roll type tube pump has been adopted as a configuration that can be downsized and the number of parts, but it has the following problems in addition to its convenience.

  In general, a single-winding tube pump configuration is provided with a tube insertion port and a tube discharge port so that the tube can be turned around the inner periphery of a cylindrical guide portion that serves as a guide for the pump, and the tube is drawn around the inner periphery of the guide portion. The roller is pressed against the tube so as to sandwich the tube with the inner periphery of the guide part, and pressure is generated by changing the volume in the tube, but when the roller rotates along the inner periphery of the guide part while pressing the tube The tube turned around the inner periphery of the guide part may move inside the guide, and if part of the tube protrudes from the opening such as the tube insertion port or the discharge port as shown in FIG. 14, the tube cannot be sealed and the tube protrudes. There was a case where a leak occurred in the part and a desired pressure could not be generated.

  In order to avoid such a state, in the conventional configuration, as shown in FIG. 12, the tube turning around the inside of the guide is fixed (direction D) so as to be away from the tube insertion port and discharge port inside the guide, The tube did not protrude from the guide opening even during pump operation.

  However, tubes that have been fixed to move away from the opening at the beginning after a long period of pump operation and durability, etc. tend to move easily inside the guide, or lower the pump drive load and put a burden on the drive source In order to prevent this, the pump configuration in which lubricant is applied to the tube that is turned around the guide inner periphery also has the effect of the lubricant, and the tube turned around the guide inner periphery is more likely to move inside the guide. The problem of becoming is not solved.

  To solve this problem, there is a configuration using a cylindrical guide shape that is sufficiently wide so that it does not protrude into the opening even if the tube moves freely inside the guide, but the pump is too wide and expensive. There was a risk that the device size would become too large.

  In addition, there is a configuration in which the tube wound around the inner peripheral portion from the opening portion of the guide portion is prevented from protruding as much as possible, and the size of the opening portion is made as close as possible to the outer diameter of the tube as a configuration for preventing leakage. According to its configuration, when the tube is pressed with a roller, the tube spreads sideways, positively contacts the side of the opening, cracks in the tube during pump operation, and leakage due to the crack occurs Because of the possibility, the size of the opening cannot be made extremely small.

  Therefore, the present invention has been made in view of the above-mentioned problems, and the object of the present invention is to stably satisfy the pressure generation performance without causing an increase in cost due to the addition of parts or the like in the configuration of the single-roll tube pump. In the realization of an ink jet recording apparatus equipped with a recovery device provided with a suction means.

  An ink jet recording apparatus according to the present invention, which has been made to achieve the above object, includes a recording means having a plurality of nozzles and nozzle arrays for ejecting ink from ejection openings, and a carriage that reciprocates by mounting the recording means. Recovery means for recovering or maintaining the ink discharge state from the discharge port, wherein the recovery means sucks ink from the discharge port or discharges ink discharged from the discharge port. The suction means comprises a single-pump tube pump mechanism, and the tube pump mechanism is provided on the insertion port side or the outlet side of the tube to be turned inside the pump base constituting the tube pump mechanism. Tube diameter outer peripheral end and front side of the tube base side adjacent to the pump base opening The distance (A) to the pump base opening end is fixed so that the relationship with the wall thickness (T) of the tube satisfies A ≦ T, and the suction means includes a plurality of tubes having different inner and outer diameters. A tube pump mechanism can be configured for each type of tube, and in the configuration corresponding to the plurality of types of tubes, the relationship of A ≦ Tmin (Tmin = the minimum thickness of the tube among the types of tubes) Configure to be

  In a preferred embodiment in this case, the suction means presses the tube with a width (B) of the opening against the pump base opening on the insertion port side or the outlet side of the tube to be turned around the pump base. The relationship with the width (C) after expansion of the tube when it is made to be C ≦ B, and the suction means is a tube pump mechanism for a plurality of types of tubes having different inner and outer diameters. In the configuration corresponding to the plurality of types of tubes, it can be fixed so as to have a relationship of Cmax ≦ B (Cmax = the maximum width after expansion among the plurality of types of tubes). Configured as follows.

  According to the present invention, a recording unit having a plurality of nozzles and nozzle arrays that eject ink from the ejection port, a carriage that reciprocates by mounting the recording unit, and an ink ejection state from the ejection port is recovered or recovered. In the ink jet recording apparatus, the recovery unit includes a suction unit capable of sucking ink from the discharge port or discharging ink discharged from the discharge port. The tube pump mechanism comprises a wound tube pump mechanism, and the tube pump mechanism is one tube wound with respect to the pump base opening on the insertion port side or the outlet side of the tube turning inside the pump base constituting the tube pump mechanism. The distance (A) from the tube diameter outer peripheral end on the adjacent side to the pump base opening end is the thickness of the tube. The basic configuration is such that the relationship with T) is A ≦ T. According to the first, second, third, and fourth aspects, the basic configuration further includes the inkjet recording apparatus. The suction means can constitute a tube pump mechanism for a plurality of types of tubes having different tube inner and outer diameters, and A ≦ Tmin (Tmin = a plurality of types of tubes) in a configuration corresponding to the plurality of types of tubes. And the suction means is connected to the pump base opening on the insertion port side or outlet side of the tube that is turned around the pump base. The width (B) of the portion is configured such that C ≦ B in relation to the width (C) after the tube is expanded when the tube is pressed. The tube pump mechanism can be configured for a plurality of types of tubes having different inner and outer diameters, and in the configuration corresponding to the plurality of types of tubes, Cmax ≦ B (Cmax = after expansion of the plurality of types of tubes when pressed) (The width is the largest), so there is no cost increase due to the addition of parts, etc. in the structure of a single-roll tube pump, and recovery with suction means that stably satisfies the pressure generation performance By obtaining the apparatus, it is possible to provide an ink jet recording apparatus that achieves small size and low cost.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

(First embodiment)
A first embodiment of the present invention will be described with reference to FIGS.

  1 and 2 are perspective views of the recording apparatus according to the first embodiment of the present invention, FIG. 3 is a cross-sectional view of the recording apparatus according to the first embodiment of the present invention, and FIGS. FIG. 6 is a bottom view showing the configuration of the recording head, FIGS. 7 to 9 are sectional views of the cleaning unit, and FIG. 10 is a schematic view showing the configuration of the cleaning unit. FIG. 11 is a schematic view showing a pump portion of the recovery device in the first embodiment of the present invention, and FIG. 13 is a schematic view showing a tube protruding state of the pump portion of the recovery device in the first embodiment of the present invention. is there.

  The recording apparatus of the present invention includes a recording apparatus 1, a paper feeding unit 2, a paper feeding unit 3, a carriage unit 5, a paper ejection unit 4, a U-turn / automatic double-sided conveyance unit (not shown), a cleaning unit 6, a recording head 7, It is composed of an exterior / electric part (not shown). Therefore, first, using FIGS. 1 to 3, these are divided into items and the outline is sequentially described.

(A) Paper Feed Unit The paper feed unit 2 has a configuration in which a pressure plate 21 for stacking sheet materials, a paper feed roller 28 for feeding sheet materials, a separation roller 241 for separating sheet materials, and the like are attached to the base 20. Yes.

  A sheet feed tray, which will be described later, for holding the stacked sheet material is attached to the base 20 or the exterior.

  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 sheet material reference, and the sheet material is fed by this. The drive to the paper feed roller 28 is a drive transmission gear comprising a DC motor (hereinafter referred to as AP motor) 69 shared with the cleaning unit provided in the paper feed unit 2 and an AP encoder for detecting the rotational speed by closed loop control. Communicated with the row. When the rotational speed is detected, the PWM value control of the current for controlling the electric power to be applied works and the speed control is performed.

  A movable side guide 23 is movably provided on the pressure plate 21 to regulate the stacking position of the sheet material. 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 friction coefficient, such as an artificial skin, is provided at a portion of the pressure plate 21 facing the sheet feeding roller 28 to prevent double feeding of sheet materials near the end of the stacking. The pressure plate 21 is configured to be able to contact and separate from the paper feed roller 28 by a pressure plate cam (not shown).

  Further, a separation roller holder 24 to which a separation roller 241 for separating sheet materials one by one is attached to the base 20 is rotatable about a rotation shaft provided on the separation base 20, and a separation roller spring (not shown) is provided. As a result, the sheet feeding roller 28 is urged. The separation roller 241 has a configuration in which a clutch spring is attached and a portion to which the separation roller 241 is attached can rotate when a load greater than a predetermined value is applied. Further, the separation roller 241 is configured to be able to contact and separate from the paper feed roller 28. The positions of the pressure plate 21 and the separation roller 241 are detected by the ASF sensor 29.

(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 a sheet material 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 a bearing 38 and attached to the chassis 11.

  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 a transport force of the sheet material. At this time, the rotating shaft of the pinch roller holder 30 is attached to the bearing of the chassis 11 and rotates around the shaft.

  The drive to the transport roller 36 is transmitted by a timing belt 351 to a pulley 361 provided on the shaft of the transport roller 36 by a timing belt 351. In addition, a code wheel 362 on which markings are formed at a predetermined pitch for detecting the 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 It is attached to the chassis 11 at an adjacent position.

  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. As the recording head 7, an ink jet recording head equipped with a replaceable ink tank for each color ink tank is used. The recording head 7 can apply heat to the ink by a heater or the like. The heat causes the ink to boil, and ink is ejected from nozzles 70 of the recording head 7 described later by pressure changes caused by the growth or contraction of bubbles due to the film boiling, thereby forming an image on the sheet material.

(C) Carriage unit The carriage unit 5 includes a carriage 50 to which the recording head 7 is attached. The carriage 50 is integrated with the chassis 11 so as to maintain a gap between the recording head 7 and the sheet material by holding a guide shaft 52 for reciprocating scanning in a direction perpendicular to the sheet material conveyance direction and the rear end of the carriage 50. It is supported by the formed guide rail 111. The guide shaft 52 is attached to the chassis 11. The guide rail 111 is formed integrally with the chassis 11.

  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. A code strip 561 in which markings are formed at a predetermined pitch for detecting the position of the carriage 50 is provided in parallel with the timing belt 541. Furthermore, an encoder sensor (not shown) for reading it is mounted on the carriage 50. Further, the carriage 50 is provided with a flexible cable 57 for transmitting a recording head 7 head signal from an electric board (not shown).

  In the above configuration, when an image is formed on the sheet material, the roller pairs 36 and 37 convey the sheet material to the row position (position in the sheet material conveyance direction) where the image is formed, and the carriage 50 forms an image on the carriage 50. The recording head 7 is moved to a row position (a position perpendicular to the sheet material conveyance direction) to face the image forming position. Thereafter, the recording head 7 ejects ink toward the sheet material in accordance with a signal from the electric substrate mounted on the carriage, thereby forming 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. Driving to the paper discharge roller 41 is transmitted from the paper discharge roller 40 via an idle gear.

  The spur 42 is a SUS thin plate provided with a plurality of convex shapes around it, is integrally molded with the resin part, and is attached to a spur holder 43. By using a spur spring (not shown) provided with a coil spring in a rod shape as a rotation shaft, the spur 42 is attached to the spur holder 43 and pressed against the paper discharge rollers 40 and 41 and the like.

  With the above configuration, the sheet material on which the image is formed by the carriage unit 5 is sandwiched and conveyed by the nip between the paper discharge roller 41 and the spur 42.

(E) Cleaning unit As shown in FIGS. 4 and 5, the cleaning unit 6 according to the present invention includes a pump 60 for cleaning the recording head 7, a cap 61 for suppressing the drying of the recording head 7, and the recording head 7. And a blade 62 for cleaning the face surface around the nozzle.

  The main drive of the cleaning unit is that the drive transmitted from the aforementioned AP motor 69 is driven by a one-way mechanism provided in the drive gear train, the pump operates in one direction, and the main cam 63 rotates in the other direction. Thus, the blade 62 and the cap 61 are moved up and down.

  As shown in FIG. 5, the pump 60 is configured to generate a negative pressure by squeezing two suction tubes 671 and 672 for sucking and discharging the pigment black ink and the dye color ink with a pump roller 209 described later. 61 is connected to the pump 60 via an air communication valve 67 or the like.

  Among the above contents, FIG. 6 is a schematic view of only the ink suction mechanism.

  Subsequently, the recording head 7 shown in FIG. 7 has a nozzle array 70 for ejecting black ink made of pigment on the face surface 712 and a nozzle array 71 for ejecting three color inks of yellow, magenta, and cyan made of dye. It consists of and.

  Next, a specific operation of the tube pump 60 as the negative pressure generating means will be described with reference to FIGS. Here, only one of the tube pumps provided in two systems is illustrated and described, but the other mechanism is also equivalent.

  A roller holder 205 having a boss 204 as a center of rotation and having the boss on both sides thereof is provided via a compression spring 208 with respect to the roller wheel 203 that is rotated by driving the AP motor 69.

  The roller holder 205 is formed with a cam portion 211 for moving the roller 209 in the radial direction and regulating the position in the radial direction. One end portion 211a of the cam portion 211 is a position where the roller 209 presses the suction tube so that the inner diameter of the suction tube is brought into close contact (to be able to generate a negative pressure by squeezing). On the other hand, the other end 211b of the cam 211 is a position where the roller 209 contacts the suction tube, but the inner diameter of the suction tube is not in close contact (not crushed until sealed).

  8 and 9, when the roller holder 205 is rotated in the CCW direction (opening direction, reverse direction) by driving the AP motor 69, the roller 209 is moved from the suction tube inner diameter contact position 211a of the cam portion 211 of the roller holder 205 to the tube inner diameter. By moving to the open position 211b and releasing the close contact of the suction tube, the inside of the cap is brought into the atmosphere communication state. On the other hand, when rotating in the CW direction, the inner wall of the suction tube comes into close contact, and the roller wheel 203 rotates, so that suction can be executed.

  9, for the sake of explanation, the roller wheel 203 and the compression spring 208 are not shown in FIG.

  Here, in the single-roll tube pump mechanism of this embodiment, as shown in FIG. 10, the suction tube 671 is wound around the pump base 207 at an angle of 360 degrees or more. That is, when rotating in the CW direction, the roller 209 simultaneously crushes the same suction tube at two locations in a partial region in the pump base 207.

  When the cleaning unit 6 configured in this way is used, ink suction for eliminating clogging or the like from the recording head 7 can be performed by operating the pump 60 with the cap 61 in close contact with the recording head 7. . The waste ink sucked by the pump 60 is absorbed and held by a waste ink absorber provided in the lower case.

  A series of operations such as the blade 62 operation and the cap 61 elevating operation 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 shown in FIG.

  When the cap 61 descends, the blade 62 moves vertically in the carriage 5 scanning direction to clean the face surface of the recording head 7 (hereinafter also referred to as wiping). A plurality of blades 62 are provided, one for wiping the vicinity of the nozzles of the recording head 7 and the other for wiping the entire face surface. Then, when it moves to the innermost position, the ink attached to the blade 62 itself can be removed by coming into contact with the blade cleaner 65. Further, after execution of wiping, there is a possibility that a different type of ink from the ink discharged from the ink discharge port may be mixed into the ink discharge port, so that a predetermined number of inks are discharged and discharged into the cap or the like. Preliminary discharge processing is executed.

  Drive transmission / control of opening / closing of the air communication valve 67 is performed by the paper discharge roller 41. By selecting the atmosphere communication valve 67, it is possible to cope with collective suction of all colors and individual suction for each color as necessary. The atmospheric communication valve position detection is performed by an atmospheric communication valve position detection sensor 651 shown in FIG.

  Next, the mechanism of the cleaning unit related to ink suction will be described with reference to schematic views.

  The negative pressure generated by the pump 60 is directly applied to the ink discharge nozzle row 70 or 71 through the cap 61 in close contact with the recording head 7, but is provided in each cap air chamber covering the black or color nozzle row. By opening one or both of the atmospheric communication valves 65, it is possible to create a state in which ink is not sucked from the nozzle row even when the pump is driven.

  Here, the present invention relates to a recording unit having a plurality of nozzles and nozzle arrays for ejecting ink from the ejection port, a carriage mounted with the recording unit and reciprocating, and an ink ejection state from the ejection port. In addition to the above, in addition to the above, a characteristic configuration as described below is included in the conventional example. That is, the characteristic tube pump mechanism of the recovery device of the ink jet recording apparatus according to the present invention will be described with reference to FIGS.

  FIG. 11 is a schematic view showing an embodiment of the present invention.

  In the tube pump configuration in the present embodiment, the opening width is set to B with respect to the opening 601 into which the tube 671 of the pump base 207 of the single-roll tube pump 60 is inserted, and the tube 671 inserted from the opening 601 and the opening It arrange | positions so that it may become the relationship A <= T with the wall thickness T of the tube 671 which wound the clearance A with the edge part 602 of the opening part 601 of the side close | similar to the tube of 601 and the adjacent side.

  With this configuration, when the tube 671 is pressed by the roller 209 as shown in FIG. 13, the amount of protrusion of the tube to the opening 601 due to the expansion by the pressing of the adjacent tube by the roller 209 is increased. It is possible to make the thickness T or less, so that even if the tube pressed by the roller 209 from the opening 601 protrudes from the opening 601, the tube 671 remains sealed and functions as a pump without leaking. Can be satisfied.

  Further, in the tube pump configuration of this embodiment, as shown in FIG. 11, when the opening width B of the opening 601 into which the tube 671 is inserted is pressed by the roller 209, the relationship with the tube width C to be expanded is expressed as C ≦ B. By setting the opening width B so that even if the tube 671 pressed by the roller 209 expands, it is possible to prevent the opening end 602 from being actively touched, and avoid the risk of damaging the tube 671. It is possible.

  In addition, the tube pump configuration in the present embodiment is an effective configuration even when realizing pumps with different pumping amounts with a common pump outer shape. That is, when a plurality of types of tube diameters are used in order to maintain a plurality of recording heads in order to maintain a plurality of recording heads and different pumping amounts are realized on a common pump base. The clearance A between the tube 671 inserted from the opening 601 and the end 602 of the opening 601 on the side close to the tube adjacent to the opening 601 with respect to the opening 601 of the pump base into which the tube 671 is inserted. Is configured so that A ≦ Tmin in relation to the minimum thickness Tmin among the plurality of types of tubes used, even when a tube having a plurality of types of thicknesses is used, FIG. When the tube 671 protrudes from the opening 601 as shown in FIG. It is possible to realize a pump.

  In addition, when realizing pumps with different displacements with a common pump base, it is possible to select the opening width B of the opening 601 into which a plurality of types of tubes 671 that can be selected to obtain the required displacement are inserted. If the opening width B of the common pump base is set such that the relationship between the maximum width Cmax of the tube width expanded when pressed by the roller 209 among the plurality of types of tubes is Cmax ≦ B, the roller 209 Even if the tube 671 having the maximum width pressed by the tube expands, the tube can be prevented from being positively touched at the end of the opening, and the tube is similarly expanded to a plurality of types of tubes having a tube expansion width smaller than that. The risk of damaging the outer peripheral surface can be avoided.

  The present invention relates to a single-winding tube pump configuration, and in the above-described embodiments, the single-winding tube pump configuration has been specifically described for the opening on the side where the tube is inserted into the pump base. However, the same effect can be obtained with the above-described configuration with respect to the opening portion on the outlet side where the inserted tube is wound around and discharged from the inside of the pump base to the outside.

  Further, the present invention has been described by taking an example of a serial printing type inkjet recording apparatus, but is not necessarily limited to this, for example, a line head having nozzle rows corresponding to the width of the recording paper is mounted. An ink jet recording apparatus may be used.

  Further, the single-roll tube pump in the present embodiment is not limited to cleaning the recording head. For example, the recording head is supplied from a main tank provided at a position different from the recording head through an ink supply tube. It may be a supply means of a tube supply type recording apparatus that supplies ink to the tube.

(Second Embodiment)
The above-described embodiment is based on the two-pipe tube pump configuration for the description of the configuration. However, the type of tube used as the pump means acting on the discharge port surface of each recording head which is different in the three-pump tube pump configuration or more. When realizing a tube pump that employs different tubes, the appropriate pump base opening for each tube thickness (Tn) and the tube width (Cn) pressed by the roller Leakage is prevented by configuring the tube pump so that the clearance (An) with each tube and the opening width (Bn) of each pump base are in the relationship of An ≦ Tn and Cn ≦ Bn. It is possible to realize a tube pump that acts on the discharge port surface of each different recording head without damaging the recording head.

1 is an external perspective view of a recording apparatus according to a first embodiment of the present invention. 1 is an external perspective view of a recording apparatus according to a first embodiment of the present invention. 1 is a cross-sectional view of a recording apparatus according to a first embodiment of the invention. 1 is an external perspective view of a recovery device for a recording apparatus according to a first embodiment of the present invention. 1 is an external perspective view of a recovery device for a recording apparatus according to a first embodiment of the present invention. The schematic diagram which shows the pump periphery of the recovery apparatus in 1st Example of this invention FIG. 3 is a bottom view of the recording head in the first embodiment of the invention. Sectional drawing of the pump part of the recovery apparatus in 1st Example of this invention Sectional drawing of the pump part of the recovery apparatus in 1st Example of this invention The perspective view of the pump part of the recovery apparatus in 1st Example of this invention The schematic diagram which shows the pump part of the recovery apparatus in 1st Example of this invention. Schematic showing the restriction of the tube placed in the pump part of the conventional recovery device The schematic diagram which showed the tube protrusion prevention state of the pump part of the recovery apparatus in 1st Example of this invention. Schematic showing the leak condition at the pump section of a conventional recovery device

Explanation of symbols

2 Feeder 3 Feeder 4 Discharger 5 Carriage 6 Cleaner 7 Recording Head 70 Nozzle 71 Nozzle 712 Face 11 Chassis 111 Guide Rail 20 Base 21 Pressure Plate 212 Pressure Plate Spring 213 Separation Sheet 23 Movable Side Guide 24 Separation Roller Holder 241 Separation roller 28 Paper feed roller 29 ASF sensor 30 Pinch roller holder 31 Pinch roller spring 32 PE sensor 35 Transport motor 351 Timing belt 36 Transport roller 361 Pulley 362 Code wheel 363 Encoder sensor 37 Pinch roller 38 Bearing 40 Discharge roller 1
41 Paper discharge roller 2
42 spur 43 spur holder 50 carriage 52 guide shaft 521 guide shaft cam 53 guide shaft cam follower 54 carriage motor 541 timing belt 542 idle pulley 561 cord strip 57 flexible cable 60 pump 601 pump base opening end 602 pump base opening end 61 cap 62 Blade 63 Main cam 64 Position detection sensor 65 Blade cleaner 651 Atmospheric communication valve position detection sensor 67 Atmospheric communication valve 671 Suction tube 672 Suction tube 69 DC (AP) motor 691 Main camshaft 203 Roller wheel 204 Boss 205 Roller holder 207 Pump base 208 Compression spring 209 Pump roller 211 Cam 211a Cam 211b Cam A Opening end and tube Clearance A1 at the end of the opening of the conventional pump configuration and the clearance B to the tube Opening width C Tube width Cmax of the pressed state by the roller Maximum tube width D of the pressed state by the roller of the plural types of tubes Conventional pump Restriction direction of tube when assembling tube in configuration T Tube thickness Tmin Minimum thickness of multiple types of tubes

Claims (6)

Recording means having a plurality of nozzles and nozzle arrays for discharging ink from the discharge ports, a carriage mounted with the recording means and reciprocating, and recovery means for recovering or maintaining the ink discharge state from the discharge ports In an inkjet recording apparatus having:
The recovery means includes suction means capable of sucking ink from the discharge port or discharging ink discharged from the discharge port, and the suction means includes a one-pipe tube pump mechanism,
The tube pump mechanism is configured with respect to the pump base opening on the insertion port side or the outlet side of the tube turning inside the pump base constituting the tube pump mechanism.
The distance A between the tube diameter outer peripheral end on the adjacent side of the wound tube and the pump base opening end is fixed so that the relationship with the wall thickness T of the tube satisfies A ≦ T. Inkjet recording apparatus. The suction means can configure a tube pump mechanism for a plurality of types of tubes having different tube inner and outer diameters, and in a configuration corresponding to the plurality of types of tubes,
2. The ink jet recording apparatus according to claim 1, wherein the ink jet recording apparatus is fixed so as to satisfy a relationship of A ≦ Tmin (Tmin = thickest tube thickness among a plurality of types of tubes). The suction means is for the pump base opening on the insertion port side or the outlet side of the tube turning around the pump base,
The inkjet recording apparatus according to claim 2, wherein the width B of the opening is configured such that C ≦ B in relation to the width C after the tube is expanded when the tube is pressed. . The suction means can configure a tube pump mechanism for a plurality of types of tubes having different tube inner and outer diameters, and in a configuration corresponding to the plurality of types of tubes,
4. The ink jet recording apparatus according to claim 3, wherein the ink jet recording apparatus is fixed so as to satisfy a relationship of Cmax ≦ B (Cmax = a plurality of types of tubes having a maximum expanded width when pressed).   5. The ink jet recording apparatus according to claim 1, wherein the recording means is an ink jet recording means provided with an electrothermal converter that generates thermal energy used for ejecting ink. .   6. The ink jet recording apparatus according to claim 5, wherein the recording unit ejects ink from an ejection port using film boiling generated in the ink by heat energy generated by the electrothermal transducer.

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