JP2013224215A - Roll paper holding device, and printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roll paper holding device and a printer, capable of downsizing a casing, while achieving stable paper supply.SOLUTION: A roll paper holding device and a printer are constituted so as to include: an expansion part 112 smaller in an area of a part abutting on roll paper when holding the roll paper than a cross-sectional area in a radial direction of the roll paper and projecting toward the outermost periphery of the held roll paper; and a roll paper support part 113 for supporting an upper end of an inner periphery of the roll paper rolled out to an opposite side of the expansion part 112 and constituted in a smaller diameter than the inner periphery of the roll paper.

Description

  The present invention relates to a roll paper holding device and a printer that support roll paper for supplying paper to a printer or the like.

In supporting the roll paper, it is necessary to support the roll paper so that it does not sway from side to side in order to stably supply the paper from the roll paper to a processing unit such as a thermal head.
In particular, when supplying roll paper made of elastic material such as polyurethane, the roll cannot be wound strongly. It is difficult to supply paper. In particular, in the case of a roll paper having a narrow width, the phenomenon of shifting to the left and right becomes significant. In the roll paper holding device described in Patent Document 1, a structure is disclosed in which both ends of the roll paper are guided by a pair of pressing plates until the outer periphery of the roll paper is reached, centering on the roll paper support portion.

  On the other hand, the pressing plate described in Patent Document 1 interferes with parts such as an ink ribbon located at the upper part of the casing, and thus becomes an obstacle to downsizing the printer casing. For this reason, in the roll paper holding device described in Patent Document 2, most of the supported roll paper is exposed and the roll paper is not guided, but interference with the components at the top of the housing is minimized. ing.

JP 2000-72295 A JP 2006-8353 A

  In the roll paper holding device described in Patent Document 1, stable paper supply is possible by guiding both ends of the roll paper, but it is not possible to realize downsizing of the housing. On the other hand, in the roll paper holding device described in Patent Document 2, it is possible to reduce the size of the housing. However, the paper cannot be stably supplied, and there is a problem that the paper rolls left and right.

  SUMMARY An advantage of some aspects of the invention is that it provides a roll paper holding device and a printer that can reduce the size of a housing while realizing stable paper supply.

  The roll paper holding device of the present invention is such that the area of the portion that comes into contact with the roll paper when the roll paper is held is smaller than the cross-sectional area in the radial direction of the roll paper, and the maximum length of the held roll paper. It has the extended part which protrudes toward an outer periphery, It is characterized by the above-mentioned.

  In the printer of the present invention, the area of the portion that contacts the roll paper when the roll paper is held is smaller than the cross-sectional area in the radial direction of the roll paper and is directed toward the outermost periphery of the held roll paper. It has a roll paper holding device which has an extension part which projects in this way.

  According to the present invention, it is possible to provide a roll paper holding device and a printer that can reduce the size of a housing while realizing stable paper supply.

It is sectional drawing of the printer which has the roll paper holding | maintenance apparatus of this invention. It is a schematic diagram showing the side of the roll paper holding device of the present invention.

  The best mode for carrying out the present invention will be described below in detail with reference to the drawings. The outline of the roll paper holding device according to the embodiment of the present invention will be described. The roll paper holding device is disposed inside a housing of a printer or the like, and holds a roll paper in which a paper is wound in a cylindrical shape, thereby providing a thermal head or the like. The paper can be supplied to the processing section.

  FIG. 1 is a cross-sectional view of a printer having a roll paper holding device of the present invention. Referring to FIG. 1, the roll paper holding device 11 of the present embodiment is disposed inside the housing of the printer 10. The roll paper holding device 11 supplies the paper 14 to the processing unit 13 having, for example, a thermal head, an ink ribbon, a platen roller, and the like by holding the roll paper 12.

  In this embodiment, the roll paper 12 is an external winding wound so that the printing surface is on the outside, but the roll paper of the present invention can be used even if it is an internal winding wound so that the printing surface is on the inside. A holding device can be applied as well.

  FIG. 2 is a schematic diagram illustrating a side surface of the roll paper holding device 11. Referring to FIG. 2, the roll paper holding device 11 includes a housing connection part 110, a paper guide 111, an extension part 112, and a roll paper support part 113.

  The case connection unit 110 connects the roll paper holding device 11 to the case of the printer 10. Accordingly, the roll paper 12 can be held at a predetermined position with respect to other mechanisms of the printer 10 such as the processing unit 13. The portion from the housing connection part 110 to the roll paper support part 113 of the roll paper holding device 11 sandwiches the roll paper 12 from both ends in the lower half from the center 20 of the roll paper shaft. Can prevent shaking. In addition, by configuring the housing connection unit 110 to be slidable perpendicularly to the traveling direction of the roll paper 12, it is possible to hold the roll paper 12 having various widths.

  The paper guide 111 guides the paper 14 from when it is pulled out from the roll paper 12 until it is supplied to the processing unit 13. This stabilizes the supply of the paper 14 to the processing unit 13. In the present embodiment, at both ends of the paper 14, a paper support 1111 having a straight upper section is supported from below, and a paper press 1112 having a substantially U-shaped cross section is pressed from above. The configuration is not limited to this, and any configuration that guides the paper 14 to the processing unit 13 may be used.

  The expansion part 112 is configured to extend from the center 20 of the roll paper shaft upward and in the direction opposite to the processing part, and to sandwich the roll paper 12 from both ends. The chassis connection unit 110 is sandwiched from the center 20 of the roll paper shaft, and the paper guide 111 guides the processing unit direction to prevent the roll paper 12 from shaking left and right. This prevents the roll paper 20 from shaking from the center 20 of the roll paper axis, which cannot be completely removed, in the direction above and opposite to the processing unit. In the present embodiment, the extended portion 112 is configured in a semicircular shape, but is not limited to this shape, and may be configured in a rectangular shape or the like.

  The roll paper support unit 113 rotatably supports the roll paper 12. In this embodiment, the roll paper support unit 113 is configured to support the inner periphery of the roll paper 12 shaft. However, the holder is suitable for other configurations, for example, the inner periphery of the roll paper 12 shaft. It is also possible to take a configuration that supports the center of the.

DESCRIPTION OF SYMBOLS 10 Printer 11 Roll paper holding device 12 Roll paper 13 Processing part 14 Paper 110 Housing | casing connection part 111 Paper guide 112 Expansion part 113 Roll paper support part

Claims (4)

An expanded portion that has an area of a portion that abuts against the roll paper when the roll paper is held smaller than a radial cross-sectional area of the roll paper and projects toward the outermost periphery of the held roll paper; ,
Supporting the upper end of the inner periphery of the roll paper unwound to the opposite side of the extended portion, and a roll paper support portion configured to have a smaller diameter than the inner periphery of the roll paper;
A roll paper holding device.   The roll paper holding device according to claim 1, wherein the extension portion protrudes until it reaches an outermost periphery of the roll paper.   The roll paper holding device according to claim 1, further comprising a guide unit that guides the roll paper supported and unwound by the roll paper support unit on a side opposite to the expansion unit. An expanded portion that has an area of a portion that abuts against the roll paper when the roll paper is held smaller than a radial cross-sectional area of the roll paper and projects toward the outermost periphery of the held roll paper; ,
Supporting the upper end of the inner periphery of the roll paper unwound to the opposite side of the extended portion, and a roll paper support portion configured to have a smaller diameter than the inner periphery of the roll paper;
A printer having a roll paper holding device.

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