JP2005219896A - Roll paper printing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a roll paper printing device capable of correcting a winding curl of a printing paper and capable of printing even when a printing paper having a small winding diameter is used. <P>SOLUTION: The roll paper printing device is equipped with a paper holder for rotatably holding the printing paper wound in a roll shape, a printhead for printing on the printing paper, a platen for supporting the printing paper when the printhead prints on the printing paper, and a printing paper delivery port for delivering the printing paper printed by the printhead. A winding curl correction means for correcting the winding curl of the printing paper is provided between the platen and the printing paper delivery port. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a configuration of a roll paper printing apparatus.

  Conventionally, a roll paper print in which a printing paper wound around a paper holder is conveyed by a paper conveying means, printed on the printing paper by a print head, and the printed printing paper is cut to a desired length and discharged. There is a device.

The prior art will be described with reference to FIGS. In a thermal transfer type color printer, a roll-like printing paper 108 wound around a paper holder and having a curl is made to correspond to a plurality of color ink ribbons by a paper conveying means, and reciprocally conveyed to the printing paper 108. Printing is performed by the print head 106, and the printing paper 108 is configured to perform printing while being guided by a paper guide plate 114 and a guide roller 115 as shown in FIG.
Conventionally, the diameter of the paper holder 7 (FIG. 3) has to be set large in order to prevent the influence of curling.
JP2003-40504

  As described above, in the prior art, even if the winding diameter of the printing paper is small, the winding diameter has to be set so as not to be affected by the curl, so that the number of printed sheets is reduced or the printing paper is large. The device has become large in order to be attached.

  An object of the present invention is to obtain a roll paper printing apparatus capable of correcting and curling curling of a curl of a printing paper even when a paper having a small winding diameter is used.

  In order to achieve the above object, according to the present invention, a paper holder that rotatably supports a print paper wound in a roll shape, a print head for printing on the print paper, and the print head for the printing In a roll paper printing apparatus having a platen that supports a printing paper when printing on the paper and a printing paper discharge port for discharging the printing paper printed by the print head, the platen and the printing paper discharge A curl correction means for correcting curl of the printing paper is provided between the outlet and the outlet.

  The curl correction means winds the print paper in a direction opposite to the curl direction, thereby correcting the curl of the print paper, and the print paper on the curl correction roller. It has a paper guide plate for guiding it so as to be wound around.

  The curl correction means further includes a guide roller for guiding the printing paper, and the guide roller is disposed in parallel with the curl correction roller. .

  Further, the guide rollers are arranged in a staggered manner.

  As described above, according to the present invention, even a small-diameter roll paper can correct the curl of the printing paper, so that a roll paper printing apparatus capable of printing a small number of sheets can be obtained.

  A paper holder that rotatably supports printing paper wound in a roll, a print head for printing on the printing paper, and a platen that supports the printing paper when the print head prints on the printing paper And a roll paper printing apparatus having a print paper discharge port for discharging the print paper printed by the print head, and correcting curling of the print paper between the platen and the print paper discharge port A curl correction means for correcting the curl of the print paper by winding the print paper in a direction opposite to the direction of the curl; and A paper guide plate for guiding the printing paper to be wound around the curl correction roller, and a guide roller for guiding the printing paper, Guide rollers and disposed in a staggered manner in parallel with the winding curl correction roller.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing an appearance of a roll paper printing apparatus according to an embodiment of the present invention. FIG. 2 is a perspective view showing a state in which the paper holder unit 2 of the roll paper printing apparatus shown in FIG. 1 is opened. FIG. 3 is a main cross-sectional view showing the state of the main cross section of the roll paper printing apparatus shown in FIG. FIG. 4 is a partial plan view showing the state of the arrow AA shown in FIG. 3 and showing the arrangement of the first guide roller 16 and the second guide roller 19. FIG. 5 is an operation explanatory view showing a state in which the print head 6 can print in the roll paper printing apparatus shown in FIG. 6A and 6B are operation explanatory views showing a state in which the first guide roller 16 and the second guide roller 19 shown in FIG. 4 are guiding the printing paper 8, wherein FIG. 6A is a top view, and FIG. It is BB sectional drawing in. FIG. 7 is an operation explanatory view showing a state when the printing paper 8 shown in FIG. 6 is fed by the feed roller 12 and the paper edge 8a is detached from the first guide roller 16, and (a) is a top view. b) is a CC cross-sectional view in (a). FIG. 8 is an operation explanatory view showing the same part as in FIG. 6 in the conventional example, with the guide roller 116 guiding the printing paper 108, (a) is a top view, and (b) is (a). It is DD sectional drawing in. 9A and 9B are operation explanatory views showing a state when the printing paper 108 shown in FIG. 8 is fed by the feed roller 112 and the paper edge 108a is detached from the guide roller 116. FIG. 9A is a top view, and FIG. FIG. 2 is an EE cross-sectional view in (a). FIG. 10 is a detailed operation explanatory diagram showing an enlargement of FIG.

  A schematic configuration of a roll paper printing apparatus according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. As shown in FIG. 1, a paper holder unit 2 is attached to the frame body 1 so that the printing paper 8 and the ink ribbon 22 can be easily replaced. The paper holder unit 2 is provided with a paper discharge port 2a, and a paper receiving pocket 4 for receiving cut waste is attached to the lower portion of the paper discharge port 2a so as to be opened and closed. As shown in FIG. 2, the printing paper 8 and the ink ribbon 22 can be easily attached and detached by opening the paper holder unit 2.

  The main configuration of the roll paper printing apparatus shown in FIG. 1 will be described with reference to FIG. A paper holder unit 2 is rotatably attached to the frame 1 by a paper holder unit shaft 2b, and can be turned between a closed state shown in FIG. 1 and an open state shown in FIG. ing. A paper holder 7 is rotatably attached to the paper holder unit frame 3 constituting the frame of the paper holder unit 2, and a printing paper 8 wound in a roll shape is attached to the paper holder 7. . Further, the upper grip roller 9 and the lower grip roller 10 are rotatably attached to the paper holder unit frame 3 so as to sandwich the printing paper 8 passing between them. A platen 11 is rotatably mounted adjacent to the lower grip roller 9 and the upper grip roller 10.

  A feed roller 12 for transporting the printing paper 8 is rotatably mounted adjacent to the platen 11, and a paper transport means (not shown) is connected to the feed roller 12, and the paper transport means is connected to a control circuit. Has been. A pinch roller 13 is rotatably attached to the outer peripheral upper surface of the feed roller 12 so as to sandwich the printing paper 8 between the feed roller 12 and the pinch roller 13. A paper guide plate 14 for guiding the printing paper 8 from the feed roller 12 to the paper discharge port 2a is provided between the feed roller 12 and the paper discharge port 2a. A first roller holder 15 and a second roller holder 18 are provided with a passage through which the paper 8 passes. Between the first roller holder 15 and the second roller holder 18, a curl correction roller 17 for correcting curl of the printing paper 8 is rotatably attached, and the paper guide plate 14 is a printing paper. It is formed so as to surround a part of the outer periphery of the curl correction roller 17 in order to bend in the direction opposite to the direction of the curl of FIG. In this way, the curl correction roller 17 and the paper guide plate 14 formed so as to surround a part of the outer periphery of the curl correction roller 17 constitute a curl correction means.

  The end 8a of the printing paper 8 wound around the paper holder 7 is pulled out, passes between the lower grip roller 9 and the upper grip roller 10, and is wound around a part of the outer periphery of the platen 11, The paper passes through the pinch roller 13, passes through a passage formed between the paper guide plate 14, the first roller holder 15, the curl correction roller 17, and the second roller holder 18, and is discharged from the paper discharge port 2 a. It is mounted to be. The printing paper 8 with the curl when wound on the paper holder 7 is formed between the paper guide plate 14, the first roller holder 15, the curl correction roller 17, and the second roller holder 18. The curl is corrected by being bent in a direction opposite to the curl by the paper guide plate 14 formed so as to surround a part of the outer periphery of the curl correction roller 17 by passing through the passage. Has been.

  Further, an ink ribbon holder 20 is rotatably attached to the paper holder unit frame 3, and an ink ribbon 22 wound in a roll shape is attached to the ink ribbon holder 20. An ink ribbon take-up shaft 21 is rotatably mounted on the opposite side of the ink ribbon holder 20 across the platen 11, and the end of the ink ribbon 22 attached to the ink ribbon holder 20 can be drawn out and taken up. Is attached. Yellow, magenta, and cyan inks are sequentially and repeatedly applied to the ink ribbon 22 with predetermined areas.

  A print head holder unit 5 is rotatably attached to the frame 1 by a print head holder unit shaft 5a. A print head 6 is fixed to the print head holder unit 5. FIG. 3 shows a state in which the print head holder unit 5 is waiting at the standby position by a print head holder unit driving means (not shown).

  The arrangement state of the first guide roller 16 and the second guide roller 19 will be mainly described with reference to FIG. A first roller holder 15 and a second roller holder 18 are attached to the paper holder unit frame 3, and the curl of the printing paper 8 is placed between the first roller holder 15 and the second roller holder 18. A curl wrinkle correction roller 17 for correcting is rotatably attached. The first roller holder 15 is provided with three first guide rollers 16 arranged in a staggered manner in parallel with the curl forcing roller 17 and rotatably attached thereto, and the second roller holder 18 has a curl correction. In parallel with the roller 17, three second guide rollers 19 are arranged in a staggered manner and are rotatably attached.

  A state when the print head 6 performs printing will be described with reference to FIG. A print head holder unit 5 having a print head 6 fixed to the front end thereof is rotatably attached to the frame 1 by a print head holder unit shaft 5a. The print head holder unit 5 is not shown. The print head holder unit driving means is rotated as shown by an arrow b from the standby position shown in FIG. 3, and the print head 6 overlaps the ink ribbon 22 and the printing paper 8 on the platen 11 as shown in FIG. Press contact.

A state in which the first guide roller 16 and the second guide roller 19 guide the printing paper 8 will be described with reference to FIGS. 6 and 7. The printing paper 8 extending from the paper holder 7 between the lower grip roller 9 and the upper grip roller 10 is supported by the upper surface of the platen 11 and is sandwiched between the feed roller 12 and the pinch roller 13. The paper is guided by the first guide roller 16 and the second guide roller 19 so as to pass through between the paper guide plate 14 and the first roller holder 15 and the second roller holder 18 and be discharged from the paper discharge port 2a. . Further, a part of the printing paper 8 is bent in a direction opposite to the curl direction by the curl correction roller 17 and the paper guide plate 14. In this state, color printing is performed by sequentially printing yellow, magenta, and cyan on the printing paper 8 while reciprocating the printing paper 8 appropriately. As described above, since the curl correction mechanism portion is provided at the retreat place of the printing paper 8, the curl can be corrected with a compact structure as described above.
For printing on the printing paper 8, first the yellow of the ink ribbon 22 is printed in the printing area while the printing paper 8 is conveyed in the direction of arrow c, then the printing paper 8 is returned, and then the printing paper 8 is moved in the direction of arrow c. The magenta is printed on the print area while being conveyed, and the cyan is printed on the print area of the print paper 8 while the print paper 8 is conveyed in the direction of the arrow c. In this way, color printing is performed while sequentially matching the yellow, magenta, and cyan coated areas of the ink ribbon 22 to the print area of the print paper 8. Finally, the non-printing portion (cut scrap after cutting) and the printing end portion of the end portion 8a of the printing paper 8 are cut with a cutter, and one printing is finished.

A state in which the printing paper 8 is fed by the feed roller 12 and the paper edge 8a is detached from the guide roller will be described with reference to FIG.
Since the three first guide rollers 16 and the second guide rollers 19 are arranged in a staggered manner, the paper edge 8a is not removed from the three first guide rollers 16 at once, but twice. Since the paper ends 8a are dispersed, the vibration generated when the paper edge 8a is released is reduced. Therefore, a striped pattern due to feed unevenness caused by this vibration or a positional shift in three-color overprinting does not occur in the printed matter.

1 is a perspective view showing an appearance of a roll paper printing apparatus in an embodiment according to the present invention. It is a perspective view which shows the state which opened the paper holder unit 2 of the roll paper printing apparatus shown in FIG. FIG. 2 is a main cross-sectional view illustrating a state of a main cross section of the roll paper printing apparatus illustrated in FIG. 1. FIG. 4 is a partial plan view showing a state of an arrow AA shown in FIG. 3 and showing an arrangement state of a first guide roller 16 and a second guide roller 17. FIG. 4 is an operation explanatory diagram showing a state in which the print head 6 can print in the roll paper printing apparatus shown in FIG. 3. FIG. 5 is an operation explanatory view showing a state in which the first guide roller 16 and the second guide roller 17 shown in FIG. 4 are guiding the printing paper 8, wherein (a) is a top view and (b) is a BB cross-sectional view in (a). It is. FIG. 6 is an operation explanatory view showing a state when the printing paper 8 shown in FIG. 6 is fed by the feed roller 12 and the paper edge portion 8a is detached from the first guide roller 16, where (a) is a top view and (b) is ( It is CC sectional drawing in a). 6A and 6B are operation explanatory views showing a state similar to that of FIG. 6 in the conventional example, and a state in which the guide roller 116 guides the printing paper 108, where FIG. 7A is a top view and FIG. It is. 8A and 8B are operation explanatory views showing a state when the printing paper 108 shown in FIG. 8 is fed by the feed roller 112 and the paper edge 108a is detached from the guide roller 116, where FIG. 8A is a top view and FIG. It is EE sectional drawing in. It is detailed operation explanatory drawing which expands and shows FIG.9 (b).

Explanation of symbols

1, frame body 2, paper holder unit 2a, paper discharge port 2b, paper holder unit shaft 3, paper holder unit frame body 4, paper receiving pocket 5, print head holder unit 5a, print head holder unit shaft 6, print head 7 , Paper holder 8, printing paper 8a, paper edge 9, lower grip roller 10, upper grip roller 11, platen 12, feed roller 13, pinch roller 14, paper guide plate 15, first roller holder 16, first guide roller 17, curl correction roller 18, second roller holder 19, second guide roller 20, ink ribbon holder 21, ink ribbon take-up shaft 22, ink ribbon

Claims (4)

  A paper holder that rotatably supports printing paper wound in a roll, a print head for printing on the printing paper, and a platen that supports the printing paper when the print head prints on the printing paper And a roll paper printing apparatus having a print paper discharge port for discharging the print paper printed by the print head, and correcting curling of the print paper between the platen and the print paper discharge port A roll paper printing apparatus comprising a curl correction means for performing the above.   The curl correction means winds the print paper in a direction opposite to the curl direction and winds the print paper around the curl correction roller for correcting the curl of the print paper. The roll paper printing apparatus according to claim 1, further comprising a paper guide plate for guiding the paper.   3. The curl wrinkle correction means further includes a guide roller for guiding the printing paper, and the guide roller is disposed in parallel with the curl wrinkle correction roller. Roll paper printing device.   The roll paper printing apparatus according to claim 3, wherein the guide rollers are arranged in a staggered manner.

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