JP2006205647A - Recording apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recording apparatus, which has an inexpensive and space saving constitution and is capable of adjusting parallelism between an LF roller and a CR shaft and parallelism between a face of a delivering hole of a head and a platen. <P>SOLUTION: A single butting member with an inclined face is provided on one end of the CR shaft, and the CR shaft is brought into contact with the inclined face to adjust the parallelism between the LF roller and the CR shaft, and the CR shaft is brought into contact with a non-inclined face of the butting member to adjust the parallelism between the face of the delivering hole and the platen. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention adjusts the parallelism between the conveying unit and the guide unit that guides the movement of the holding unit of the recording unit in the main scanning direction, and the parallelism between the discharge port surface of the recording unit and the recording medium holding unit. The present invention relates to a recording apparatus capable of

Conventionally, in the recording apparatus, each adjustment has been performed by the movement of the holding means of the recording means in the main scanning direction and the movement of the recording medium holding means (for example, Patent Document 1, Patent Document 2).
JP 2003-103851 A JP-A-10-119385

  However, in the conventional recording apparatus, the parallelism between the ejection port surface of the recording unit and the recording medium holding unit is implemented by moving the recording medium holding unit (Patent Document 1), and the conveyance It is well known that the parallelism between the means and the guide means is carried out by moving the guide means. For this reason, in order to perform each adjustment within one recording apparatus, the adjustment is performed by moving a plurality of locations related to recording on a recording medium, which is costly, lowers cost, and saves space. There was a problem that would be a hindrance.

  Further, when the parallelism between the discharge port surface of the recording means and the recording medium holding means is carried out by moving the guide means, the parallelism between the transport means and the guide means is not adjusted. There was a problem of (Patent Document 2).

  The present invention has been made paying attention to the above points, and an object thereof is to provide a recording apparatus that can be adjusted with a low-cost and space-saving configuration.

  In order to achieve the above object, a configuration according to the present invention includes: a recording medium conveying unit; a recording unit that records in units of rows according to image information on a recording medium conveyed in units of rows by the conveying unit; In a recording apparatus, comprising: holding means for recording means; guide means for guiding movement of the holding means in the main scanning direction; and recording medium holding means at a position facing the recording means. The parallelism of the guide means and the parallelism between the discharge port surface of the recording means and the recording medium holding means are adjusted by the movement of the guide means via a contact member that contacts the guide means. Recording device.

  According to the said structure, it is possible to implement the said adjustment only by the movement of the said guide means. That is, according to the present invention, it is possible to provide a recording apparatus that can perform the adjustment with an inexpensive and space-saving configuration.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to examples.

[First Embodiment]
A first embodiment of the recording apparatus of the present invention will be described.

  1 to 5 are a perspective view (FIGS. 1, 2 and 4) and a cross-sectional view (FIGS. 3 and 5) of an ink jet recording apparatus for explaining a first embodiment of the present invention.

  A sheet feeding unit 2 separates the sheet material P stacked on the pressure plate 21 one by one by the separation roller 241 and the sheet feeding roller 28 and feeds the sheet material P to the conveyance unit 3.

  3 is a conveyance part, and the conveyance part 3 is attached to the chassis 11 which consists of a sheet metal bent up. The transport unit 3 includes a transport roller 36 that transports 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 bearings (not shown) and attached to the chassis 11.

  A plurality of driven pinch rollers 37 are provided in contact with the conveying roller 36. The pinch roller 37 is held by a pinch roller holder 30 and is urged by a pinch roller spring 31, so that the pinch roller 37 is pressed against the transport roller 36 and generates a transport force for the sheet material P. At this time, the rotating shaft of the pinch roller holder 30 is attached to a bearing portion (not shown) of the chassis 11 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 conveyance 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 the leading edge and trailing edge detection of the sheet material 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 about a sliding bearing portion 331 and is positioned by contacting the chassis 11.

  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 conveyance unit 3 is guided by the pinch roller holder 30 and the paper guide flapper 33 and is sent to the roller pair of the conveyance roller 36 and the pinch roller 37. At this time, the leading edge of the sheet material P conveyed by the PE sensor lever 321 is detected, and thereby the printing position of the sheet material P is obtained. Further, the sheet material P is transported on the platen 34 by the roller pair 36 and 37 being rotated by the transport motor 35.

  The driving of the transport roller 36 is provided on the shaft of the transport roller 36 via a timing belt (not shown) attached to a motor pulley 352 fixed to the output shaft on one end side. It is transmitted to the pulley 361.

  A code wheel 362 on which markings are formed at a pitch of 150 to 300 lpi for detecting the amount of conveyance 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 serves as a code wheel. It is attached to the chassis 11 at a position adjacent to 362.

  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 a nozzle (not shown) of the recording head 7 by a 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.

  A carriage unit 5 has a carriage 50 to which the recording head 7 is attached. The carriage 50 holds a guide shaft 52 for reciprocating scanning in a direction perpendicular to the conveying direction of the sheet material P and a guide rail for maintaining a gap between the recording head 7 and the sheet material P by holding the rear end of the carriage 50. 111.

  At this time, in the vicinity of one end portion of the guide shaft 52, a support member 60 that can adjust the distance between the guide shaft 52 and the platen 34 and can adjust the parallelism of the guide shaft 52 and the transport roller 36. It is supported by. Further, in the vicinity of the other end portion of the guide shaft 52, a support member (not shown) that can adjust the distance between the guide shaft 52 and the platen 34 is provided.

  The guide rail 111 is integrally formed with the chassis 11. A thin sliding sheet 53 of SUS or the like is stretched on the sliding side of the guide rail 111 with respect to 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 (not shown) 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. In addition, an encoder sensor (not shown) that reads it is provided on a carriage substrate (not shown) mounted on the carriage 50.

  Further, in order to fix the recording head 7 to the carriage 50, the carriage 50 is provided with a not-shown abutting portion for positioning and a pressing means (not shown) for pressing and fixing. The pressing means 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.

  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) for image formation, and the carriage 50 is moved by the carriage motor 54. The recording head 7 is moved to the row position for image formation (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.

  Reference numeral 4 denotes a paper discharge unit. The two paper discharge rollers 40 and 41 each having a plurality of transport units 401 and 411 and the transport units 401 and 411 are placed at a predetermined pressure so that they can be rotated by being driven. The spur 42 is configured, and a gear train for transmitting the driving of the conveying roller to the 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. The spur 42 is provided at a position corresponding to the conveying portions 401 and 411 of the paper discharge rollers 40 and 41, and mainly serves to generate the conveyance force of the sheet material P, and the conveyance of the paper discharge rollers 40 and 41 therebetween. It is provided at a position where the portions 401 and 411 are not present, and has a role of mainly suppressing lifting when the sheet material P is printed.

  By lifting both ends of the sheet material P between the paper discharge rollers 40 and 41, holding the sheet material P at the tip of the paper discharge rollers 40 and 41, and rubbing the print on the previous sheet material P. A paper edge support (not shown) for preventing damage is provided.

  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 the lower part of the base 99. When used, pull out. The sheet discharge tray 46 increases in height toward the leading end, and both ends thereof are configured to be high in height so that the stackability of the discharged sheet material P can be improved and the printing surface can be prevented from rubbing.

  Next, referring to FIGS. 5 to 7, the recording head for adjusting the distance a between the discharge port surface 72 of the recording head 7 and the recording sheet support surface 341 of the platen 34 holding the recording sheet P. 7 between the guide shaft 52 that holds the carriage 50 and the recording sheet support surface 341 of the platen 34 that holds the recording sheet P, and the guide shaft 52 and the conveyance roller 36 are parallel to each other. The degree adjustment point will be described in detail.

  First, adjustment of the distance between the guide shaft 52 and the recording sheet support surface 341 of the platen 34 holding the recording sheet P will be described.

  The vicinity of both ends of the guide shaft 52 is supported by the support surface 62 of the support member 60. At this time, the support member 60 is provided with a guide hole 61, and the stud 112 provided in the chassis 11 is fitted into the guide hole 61, and the support member 60 is indicated by an arrow A or an arrow B in FIG. 6. It is guided in the direction and can move. Further, the movement of the support member 60 in the direction of arrow A or arrow B is centered on the stepped screw 90 that is temporarily fastened to the rotation center 522 that contacts the contact surface 62 of the support member 60. This is performed by rotating an eccentric cam 521 that can rotate in the direction of C or arrow D.

  For example, when the eccentric cam 521 is rotated by 30 ° in the direction of arrow C in FIG. 6 from the state shown in FIG. 6, the distance from the rotation center 522 to the outer peripheral surface 523 is reduced by r1-r2. 6 is moved in the direction of arrow B in FIG. 6, and the guide shaft 52 supported by the support member 60 also moves in the direction shown in FIG. It moves in the direction of arrow B.

  At this time, since the recording head 7 is supported by the guide shaft 52 via the carriage 50, the recording head 7 is also moved in the direction of arrow B in FIG. The distance a between the exit surface 72 and the recording sheet support surface 341 of the platen 34 holding the recording sheet P is adjusted.

  Then, by performing the adjustment at both ends of the guide shaft 52, the interval a between the discharge port surface 72 of the recording head 7 and the recording sheet support surface 341 of the platen 34 holding the recording sheet P is set to the recording sheet. It will be adjusted equally over the full width of P. After the adjustment, the eccentric cam 521 is fastened to the chassis 11 with a step screw 90, and the discharge port surface 72 of the recording head 7 and the recording sheet support surface 341 of the platen 34 holding the recording sheet P. The distance a is maintained appropriately and equally over the entire width of the recording sheet P.

  Next, adjustment of the parallelism between the guide shaft 52 and the transport roller 36 will be described.

  The support member 60 is provided with an inclined surface 63 inclined at an angle of 0.4 mm at 1 mm. The guide shaft 52 is urged in the direction of arrow T in FIG. 6 by a guide shaft spring 80. Accordingly, the guide shaft 52 is thereby urged by the support surface 63 of the support member 60 and the inclined surface 63.

  With the above configuration, when the support member 60 is moved in the direction of arrow E or arrow F in FIG. 7, the guide shaft 52 is moved in the direction of arrow G or arrow H in FIG.

  At this time, as described above, since the inclined surface 63 is inclined at an angle of 1 mm and 0.4 mm, for example, the left side portion of the guide shaft 52 in FIG. .2 mm, when the support member 60 that supports one end of the left side portion of the guide shaft 52 in FIG. 2 is moved 0.5 mm in the direction of arrow F in FIG. The guide shaft 52 moves 0.2 mm in the direction of the arrow H in FIG. 7 on the left side in FIG.

  After the movement of the support member 60 is completed, the support member 60 is fastened to the chassis 11 with screws 91, and the adjustment of the parallelism between the guide shaft 52 and the transport roller 36 is also completed.

  As described above, according to the present embodiment, the discharge port surface 72 of the recording head 7 and the recording sheet support surface 341 of the platen 34 that holds the recording sheet P can be provided at a low cost and in a space-saving configuration. It is possible to provide a recording apparatus capable of adjusting the interval and the parallelism between the guide shaft 52 and the transport roller 36.

[Second Embodiment]
In the above-described embodiment, the parallelism between the guide shaft 52 and the transport roller 36 is adjusted by adjusting only one end side of the guide shaft 52. However, the above-described configuration is the other end side of the guide shaft 52. The parallelism between the guide shaft 52 and the transport roller 36 is adjusted at both ends of the guide shaft 52, and the parallelism between the guide shaft 52 and the transport roller 36 is adjusted. Adjustment of the relative position of the head 7 with respect to the platen 34 in the transport direction can also be performed, and in this case, the same effect as described above can be obtained.

[Third Embodiment]
In the above-described embodiments, the case where each adjustment is performed by moving the support member has been described in any case. For example, in the first embodiment, the platen that holds the guide shaft 52 and the recording sheet P is used. 34 is adjusted as described above, and the parallelism between the guide shaft 52 and the conveying roller 36 is adjusted by moving the guide shaft 52 with the arrow E in FIG. Even in the configuration that moves in the direction of the arrow F, the same effect as described above can be obtained in the same process as described above.

  In the embodiment described above, the case where the movement of the support member 60 in the direction of arrow A or arrow B in FIG. 6 is performed by the rotation of the eccentric cam 521 has been described. Even if the support member 60 is moved directly without being used, the same effect as described above can be obtained. Further, it goes without saying that the slope of the inclined surface up to the above is not limited to the above-mentioned value, and is determined as appropriate according to the adjustment range.

1 is a perspective view of a recording apparatus according to a first embodiment of the present invention. The perspective view of the mechanism part of the recording device in 1st Embodiment of this invention. Sectional drawing of the mechanism part of the recording device in 1st Embodiment of this invention 1 is a perspective view of a conveyance unit of a recording apparatus according to a first embodiment of the invention. Sectional drawing of the conveyance part of the recording device in 1st Embodiment of this invention The side view of the principal part in 1st Embodiment of this invention The top view of the principal part in 1st Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Recording device 2 Paper feed device 3 Conveyance part 4 Paper discharge part 5 Carriage part 7 Recording head 11 Chassis 111 Guide rail 21 Pressure plate 241 Separation roller 28 Paper feed roller 29 ASF sensor 30 Pinch roller holder 31 Pinch roller spring 32 PE sensor 321 PE Sensor lever 33 Paper guide flapper 331 Bearing portion 34 Platen 35 Conveyance motor 36 Conveyance roller 361 Pulley 362 Code wheel 37 Pinch roller 39 Encoder sensor 40 First discharge roller 401, 411 Conveyance portion 41 Second discharge roller 42 Spur 43 Spur holder 44 spur spring 46 discharge tray 50 carriage 51 head set lever 52 guide shaft 521 eccentric cam 53 sliding sheet 54 carriage motor 541 timing belt 542 idle pulley 55 carriage Bumpers 561 codestrip 60,64,65 supporting member 80 a guide shaft spring 90 stages bis

Claims (7)

A recording medium conveying unit; a recording unit configured to perform recording in a row unit according to image information on a recording medium conveyed in a row unit by the conveying unit; a holding unit of the recording unit; and a main scanning direction of the holding unit In a recording apparatus comprising guide means for guiding movement to a recording medium, and a recording medium holding means at a position facing the recording means,
The parallelism between the conveying means and the guide means, and the parallelism between the discharge port surface of the recording means and the recording medium holding means can be determined by the movement of the guide means via a contact member that contacts the guide means. A recording apparatus characterized by adjusting.   The said contact member is single in the one end side of the said guide means, The said adjustment is implemented by the movement of the said guide means via the said single contact member. Recording device.   2. The adjustment according to claim 1, wherein the adjustment by the movement of the guide means is performed by movement of a single contact member on one end side of the guide means and movement of the guide means in a main scanning direction. Recording device.   The recording apparatus according to claim 1, wherein the contact member is provided in the vicinity of both end portions of the guide unit.   The contact member is provided in the vicinity of one end of the guide means, and the other end is provided with an adjustment member for adjusting parallelism between the discharge port surface of the recording means and the recording medium holding means. The recording apparatus according to claim 1, wherein the recording apparatus is a recording apparatus.   6. The contact member according to claim 1, wherein the contact member includes an inclined surface, and adjustment of parallelism between the conveying unit and the guide unit is performed by contacting the guide unit with the inclined surface. Or a recording apparatus according to claim 1.   The recording apparatus according to claim 1, wherein the recording unit of the recording apparatus is an inkjet recording unit.

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