JP2005324929A - Recording device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To correct the skew of a recording sheet in feeding in a recording device in which the fed recording sheet is reciprocatingly moved on a platen by two carrying rollers and discharged to the feed part side. <P>SOLUTION: This recording device comprises a paper feed part 100 having a feed roller 102 feeding the recording sheet P, a paper discharge roller 301 carrying the recording sheet P fed from the paper feed part 100 to a recording position and discharging the recorded recording sheet, a paper discharge pinch roller 302 rotatingly driven by the paper discharge roller 301, a carrying roller 201 carrying the recording sheet to the recording position and carrying the recording sheet during recording, a pinch roller 202 rotatingly driven by the carrying roller 201, and the platen 401 supporting the recording sheet. The recording sheet is reciprocatingly moved on the platen 401 by the paper discharge roller 301 and the carrying roller 201. When the recording sheet is fed, the skew of the recording sheet can be corrected by the contact of the recording sheet on the holding part paper of the paper discharge roller 301 and the paper discharge pinch roller 302. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to skew correction of a recording medium in a recording apparatus that reciprocates a supplied recording sheet (for example, recording paper) on a platen by two conveying rollers and discharges the recording sheet to a recording sheet supply side.

  The recording apparatus conveys a recording sheet such as paper to a recording position by a conveyance roller, records printing, and discharges it.

  A conventional example of a system (hereinafter referred to as a switchback system) in which a recording sheet is reciprocated in a recording apparatus by two conveying rollers is proposed in Patent Document 1.

In addition, as a recording apparatus adopting the switchback method, there is a sublimation printer. In the sublimation type printer, the skew of the recording sheet is corrected on the side surface of the cassette in which a plurality of recording sheets are stacked and stored.
JP 11-291558 A

  However, in Patent Document 1, a recording apparatus having two recording units conveys a recording sheet recorded by one recording unit to another recording unit, and the skew feeding at the time of feeding the recording sheet is performed. It is not about correction.

  The sublimation printer described in the above background art corrects skew during feeding of recording sheets. However, a cassette is required for each recording sheet size such as B5 and A4. Alternatively, when developing a cassette that can accommodate recording sheets of various sizes, the structure of the cassette becomes complicated.

  An object of the present invention is a recording apparatus in which a recording sheet supplied from a supply unit is reciprocally moved on a platen by two conveyance rollers and discharged to the supply unit side, and recording capable of correcting skew during recording sheet supply. Is to provide a device.

  In order to achieve the above object, according to the present invention, a supply unit having a supply roller for supplying a recording sheet, and a recording sheet supplied from the supply unit are transported to a recording position and the recorded recording sheet is discharged. In a recording apparatus that includes one conveying roller, a first driven roller that rotates following the first conveying roller, and a platen that supports the recording sheet at the recording position, when the recording sheet is supplied, the recording sheet is The skew of the recording sheet is corrected by abutting against the holding portion between the conveying roller and the first driven roller.

  According to the present invention, in the recording apparatus in which the recording sheet supplied from the supply unit is transported onto the platen for recording by the transport roller, and then discharged to the supply unit side, the first transport roller and the second rotationally driven by the first transport roller. The skew of the recording sheet can be corrected by abutting the recording sheet supplied from the supply unit against the sandwiching portion with one driven roller.

  Next, embodiments of the present invention will be described with reference to the drawings. Here, a recording sheet will be described as an example of a recording sheet on which recording such as printing is performed by the recording apparatus of the present invention, but the present invention is not limited to this.

(First embodiment)
FIG. 1 shows a schematic view of a recording apparatus according to the invention. The recording apparatus according to the present embodiment is provided on the front side of the apparatus, and feeds a recording sheet (not shown) to a recording position, a conveying unit 200 for conveying the recording sheet, and an apparatus of the conveying unit 200. A discharge unit 300 located on the front side, a recording unit 400 that performs recording such as printing on a recording sheet, and a carriage unit 500 that scans a recording head H that performs recording on the recording sheet are provided.

  FIG. 2 is a cross-sectional view of the paper feed unit 100, the transport unit 200, the discharge unit 300, and the recording unit 400. The paper feed unit 100 is driven by a paper feed motor (not shown). When the paper feed motor rotates, the pressure plate 101 on which the paper is stacked is lifted (where it is lifted in FIG. 2), and the recording paper P and the paper feed roller 102 come into contact with each other. Then, the paper feed rollers 102 and 103 rotate to feed the recording paper P located at the top.

  The recording paper P fed from the paper feeding unit 100 is transported in the A direction through the recording unit 400 by the discharge unit 300 and the transport unit 200. After the recording paper P passes the recording start position C, the transport unit 200 transports the recording paper P in the B direction and transports it to the recording start position C. The paper that has been recorded is discharged onto the paper discharge tray 104 by the discharge unit 300.

  The discharge unit 300 conveys the recording sheet P fed from the sheet feeding unit 100 to the recording start position, and discharges the recording sheet that has been recorded, and a discharge pinch that rotates following the discharge roller 301. It comprises a roller 302 and a paper discharge pinch roller holder 304 that supports the paper discharge pinch roller 302.

  The conveyance unit 200 conveys the recording paper to the recording position, conveys the recording paper being recorded, a pinch roller 202 that rotates following the conveyance roller, and a pinch roller holder 204 that supports the pinch roller 202. Consists of. The recording unit 400 includes a platen 401 that supports recording paper. The paper discharge roller 301 and the transport roller 201 are driven by a paper feed motor 205. The driving of the paper feed motor 205 is transmitted to the transport roller 201 via the belt 206 and further transmitted to the paper discharge roller 301 via the idler gear 208.

  3 is a schematic diagram of the paper discharge roller 301 and the paper discharge pinch roller 302, and FIG. 4 is a schematic cross-sectional view of the transport unit 200, the paper discharge unit 300, and the recording unit 400.

  The paper discharge pinch roller 302 has a through hole in the central axis, and a paper discharge pinch roller spring 303 that is a spring shaft that applies a pressure contact force to the paper discharge roller 301 is inserted into the through hole. Then, it is attached to a paper discharge pinch roller holder 304 (FIGS. 2 and 5) via a paper discharge pinch roller spring 303. The pressure contact force of the paper discharge pinch roller 302 against the paper discharge roller 301 is that the recording paper P is not caught by the nipping portion (nip) between the paper discharge roller 301 and the paper discharge pinch roller 302 by the paper supply force of the paper supply roller 101. Force (force that is not sandwiched between the paper discharge roller 301 and the paper discharge pinch roller 302). Here, both ends of the paper discharge pinch roller 302 have a small diameter, and the small diameter portion 302 a abuts the paper discharge pinch roller holder 304 when correcting the skew of the recording paper during paper feeding. This is because when the paper discharge pinch roller spring 303 inserted into the through hole of the paper discharge pinch roller 302 is brought into contact with the paper discharge pinch roller holder 304, the paper discharge pinch roller spring 303 is deformed because it is a spring shaft. This is because the skew cannot be corrected. During recording and at the time of paper discharge, a paper discharge pinch roller spring 303 inserted into a through hole of the paper discharge pinch roller 302 abuts on the paper discharge pinch roller holder 304.

The paper discharge pinch roller 302 presses the recording paper P against the platen 401 to stabilize the distance between the recording head H and the recording paper P (the space between the papers). Is attached to the platen 401 side so as to be inclined at a predetermined angle θ ₁ with respect to the direction orthogonal to the conveyance surface of the recording paper P (see FIG. 4).

  Next, the skew correction operation of the recording paper P at the time of paper supply will be described.

  The paper feed roller 102 is rotated by a paper feed motor (not shown), and the stacked recording paper P is fed toward the nipping portion between the paper discharge roller 301 and the paper discharge pinch roller 302. At this time, the paper feed motor 205 is stopped, and the fed recording paper P hits the nipping portion of the paper discharge roller 301 and the paper discharge pinch roller 302. After the impact, the recording paper P is aligned along the nipping portion between the paper discharge roller 301 and the paper discharge pinch roller 302 by further rotating the paper supply roller 102. That is, the leading edge of the recording paper P follows the tangent line when the paper discharge roller 301 and the paper discharge pinch roller 302 are pressed. At this time, the paper feed motor 205 stops at the paper feed roller 102 until the recording paper P is aligned along the holding portion.

  Thereafter, the paper feed motor 205 is driven to rotate the paper discharge roller 301 to draw the recording paper P onto the platen 401.

(Second Embodiment)
Next, a second embodiment will be described. The same components as those in the first embodiment are denoted by the same reference numerals.

  FIG. 5 is a schematic diagram of the transport unit 200, the discharge unit 300, and the recording unit 400 according to the second embodiment of the present invention.

  In the first embodiment, the conveyance roller 201 and the pinch that are being conveyed because the pressure contact force is strong when the recording paper P is bitten between the nipping portions of the discharge roller 301 and the discharge pinch roller 302 during recording. There is a risk that slip occurs between the rollers 202 and unevenness occurs in the image.

  In this embodiment, in order to avoid this, when correcting skew during paper feeding, the recording paper P is caught by the nipping portions of the paper discharge roller 301 and the paper discharge pinch roller 302 by the paper supply force of the paper supply roller 101. It presses with a force that is not inserted, and tries to release the pressure during recording.

  The paper discharge pinch roller 302 has a through hole in the central axis, and a paper discharge pinch roller spring (not shown) that is a spring shaft that applies a pressure contact force to the paper discharge roller 301 is inserted into the through hole. The sheet is attached to the paper discharge pinch roller holder 304 via a spring (not shown). Here, the paper discharge pinch roller holder 304 is rotatable about a rotation shaft 304a, and has a contact portion 304b that contacts the bar 500a of the carriage portion 500 in a non-recording area.

  When feeding the recording paper P, the carriage unit 500 stands by at a paper feeding position in the non-recording area. At that time, the bar (discharge pinch roller holder contact portion) 500a of the carriage unit 500 presses the contact portion (carriage contact portion) 304b of the discharge pinch roller holder 304 with the carriage portion 500, thereby causing the discharge roller 301 to move. Takes a strong pressure contact force. During recording, the paper discharge pinch roller holder 304 is not restrained by the carriage 500 and can escape by the size of the play a. The deflection of the paper discharge pinch roller spring 303, which is a spring shaft, is reduced by the amount of play a, and the pressure contact force of the paper discharge pinch roller 302 to the paper discharge roller 301 is released.

(Third embodiment)
Next, a third embodiment will be described. The same reference numerals are used for the same components as those in the first embodiment.

  FIG. 6 is a schematic diagram of the transport unit 200, the discharge unit 300, and the recording unit 400 according to the third embodiment of the present invention.

  In the present embodiment, the paper discharge pinch roller 302 is positioned at the center of the paper discharge roller 301 and the paper discharge pinch roller 302 so that the recording paper easily hits the nipping portion between the paper discharge roller 301 and the paper discharge pinch roller 302 during paper supply. The straight line connecting the two is configured to be inclined at a predetermined angle toward the paper feed unit 100 from the direction perpendicular to the conveyance surface of the recording paper. A straight line connecting the centers of the paper discharge roller 301 and the paper discharge pinch roller 302 is perpendicular to the conveyance surface of the recording paper P so that the recording paper is pressed against the platen 401 during recording and paper discharge to stabilize the gap between the paper. On the other hand, the platen 401 is inclined at a predetermined angle.

  The paper discharge pinch roller 302 has a through hole in the central axis, and a paper discharge pinch roller spring (not shown) that is a spring shaft that applies a pressure contact force to the paper discharge roller 301 is inserted into the through hole. It is attached to the paper discharge pinch roller holder 304 via a spring. Here, the paper discharge pinch roller holder 304 is rotatable about the paper discharge roller 301 and has a contact portion 304b that contacts the bar 500a of the carriage portion 500 in the non-recording area. Further, the paper discharge pinch roller holder 304 is urged by the urging member 306 in the direction of arrow A in the figure.

  When feeding the recording paper P, the carriage unit 500 stands by at a paper feeding position in the non-recording area. At this time, when the bar 500a of the carriage unit 500 presses the contact portion 304b of the paper discharge pinch roller holder 304, the paper discharge pinch roller holder 304 rotates in the direction of arrow B in the figure, and the paper discharge pinch roller 302 is discharged. A straight line connecting the centers of the paper roller 301 and the paper discharge pinch roller 302 is positioned so as to be inclined at a predetermined angle toward the paper feed unit 100 from the direction perpendicular to the recording paper conveyance surface. During recording, in order to press the recording paper against the platen 401 to stabilize the gap, the straight line connecting the centers of the paper discharge roller 301 and the paper discharge pinch roller 302 is in the platen 401 with respect to the direction perpendicular to the conveyance surface of the recording paper P. It is in a position inclined at a predetermined angle to the side.

(Fourth embodiment)
Next, a fourth embodiment will be described. The same components as those in the first embodiment are denoted by the same reference numerals.

  FIG. 7 is a schematic diagram of a paper feed unit according to the fourth embodiment of the present invention, showing the time of paper feeding, and FIG. 8 is during recording and paper ejection.

  In this embodiment, a paper feed pinch roller that corrects the skew of the recording paper during paper feeding and a paper ejection pinch roller that conveys the recording paper during recording and paper ejection are provided. At the time of middle and paper ejection, the paper ejection pinch roller is pressed against the paper ejection roller.

  Both the paper feed pinch roller 307 and the paper discharge pinch roller 302 have a through hole in the central axis, and a pinch roller spring (not shown) that is a spring shaft that applies a pressure contact force to the paper discharge roller 301 is inserted into the through hole. The sheet is attached to the paper discharge pinch roller holder 304 via a pinch roller spring. The pressure contact force of the paper feed pinch roller 307 is set so that the recording paper P is not caught between the paper ejection roller 301 and the paper feed pinch roller 307 by the paper feed force of the paper feed roller 101. Further, both ends of the paper feed pinch roller 307 have a small diameter as shown in FIG. 3, and the small diameter portion 302 a comes into contact with the paper discharge pinch roller holder 304 when correcting skew during paper feeding. The paper discharge pinch roller holder 304 is rotatable about a rotation shaft 304a and has a contact portion 304b that contacts the bar 500a of the carriage portion 500 in a non-recording area. Further, the paper discharge pinch roller holder 304 is urged by the urging member 306 in the direction of arrow A in the figure.

  When feeding the recording paper P, the carriage unit 500 stands by at a paper feeding position in the non-recording area. At this time, when the bar 500a of the carriage unit 500 presses the contact portion 304b of the paper ejection pinch roller holder 304, the paper ejection pinch roller holder 304 rotates in the direction of arrow B in the figure, and the paper feeding pinch roller 307 is ejected. A straight line connecting the centers of the paper roller 301 and the paper discharge pinch roller 302 is pressed against the paper feed unit 100 at a position inclined by a predetermined angle from the direction orthogonal to the recording paper conveyance surface (state of FIG. 7). In order to stabilize the gap between the recording sheets by pressing the recording sheet against the platen 401 during recording and discharging, the straight line connecting the centers of the discharging roller 301 and the discharging pinch roller 302 is perpendicular to the conveyance plane of the recording sheet P. The platen 401 is pressed against the platen 401 at a position inclined by a predetermined angle (state shown in FIG. 8).

1 is a schematic view of a recording apparatus according to the present invention. It is sectional drawing of the paper feed part of 1st Embodiment by this invention. It is the schematic of the paper discharge roller part of 1st Embodiment by this invention. It is the schematic of the paper feeding part of 1st Embodiment by this invention. It is the schematic of the paper feeding part of 2nd Embodiment by this invention. It is the schematic of the paper feed part of 3rd Embodiment by this invention. It is the schematic of the paper feeding part of 4th Embodiment by this invention. It is the schematic of the paper feeding part of 4th Embodiment by this invention.

Explanation of symbols

P Recording paper H Recording head 100 Paper feeding unit 102, 103 Paper feeding roller 200 Carrying unit 201 Carrying roller 202 Pinch roller 204 Pinch roller holder 205 Paper feed motor 300 Ejecting unit 301 Paper ejecting roller 302 Paper ejecting pinch roller 400 Recording unit 401 Platen

Claims (12)

A supply unit having a supply roller for supplying a recording sheet, a first conveyance roller for conveying the recording sheet supplied from the supply unit to a recording position and discharging the recorded recording sheet, and a follower of the first conveyance roller In a recording apparatus including a first driven roller that rotates, and a platen that supports a recording sheet at the recording position,
A recording apparatus, wherein when feeding a recording sheet, the skew of the recording sheet is corrected by abutting the recording sheet against a nipping portion between the first conveying roller and the first driven roller.   The apparatus further comprises a second conveying roller that conveys the recording sheet to a recording position and conveys the recording sheet that is being recorded, and a second driven roller that is driven and rotated by the second conveying roller, and the first conveying roller and the first conveying roller The recording apparatus according to claim 1, wherein the recording sheet is reciprocated on the platen by the two conveying rollers.   The recording apparatus according to claim 1, wherein the supply roller and the first transport roller are driven by different driving sources.   2. The first driven roller is in pressure contact with the first conveying roller with a force that prevents the recording sheet from being caught in a nipping portion with the first conveying roller by the supply force of the supply roller. Recording device.   The first driven roller has a through hole in its central axis, and a spring shaft for applying a pressing force to the first transport roller is inserted into the through hole, and the first driven roller is supported via the spring shaft. The recording apparatus according to claim 1, wherein the recording apparatus is attached to a member.   The first driven roller has a large-diameter portion that contacts the recording sheet and the first conveying roller and small-diameter portions at both ends thereof, and the small-diameter portion contacts the first driven roller support member when correcting the skew of the recording sheet. The recording apparatus according to claim 5.   The recording apparatus according to claim 1, wherein a pressing force of the first driven roller to the first conveying roller is variable.   The recording apparatus according to claim 1, wherein a straight line connecting the centers of the first conveyance roller and the first driven roller has a predetermined angle with respect to a direction perpendicular to the conveyance surface of the recording sheet.   The recording apparatus according to claim 1, wherein the first driven roller is rotatable on a circumference of the first transport roller.   The recording apparatus according to claim 1, wherein a plurality of the first driven rollers are provided on the same straight line in the recording sheet conveyance direction.   9. The recording according to claim 8, wherein, during non-recording, a straight line connecting the centers of the first conveyance roller and the first driven roller is inclined at a predetermined angle toward the supply unit with respect to a direction orthogonal to the conveyance surface of the recording sheet. apparatus.   9. The recording apparatus according to claim 8, wherein a straight line connecting the centers of the first conveyance roller and the first driven roller is inclined at a predetermined angle toward the platen with respect to a direction orthogonal to the conveyance surface of the recording sheet during recording and discharging. Recording device.

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