JP2010036989A - Rolled paper holding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rolled paper holding device rotatably holding a rolled paper with a long printing medium wound thereon in a roll shape, and guiding both ends of the rolled paper. <P>SOLUTION: The device relates to the rolled paper holding device holding the rolled paper with the long paper wound thereon in the roll shape. It includes a pair of guide members with their guide surfaces guiding the side surfaces of the rolled paper arranged opposingly, holding members holding the rolled paper, that are respectively arranged in the holes of the pair of guide members, and energizing members energizing the respective holding members to positions protruded from the guide surfaces toward the other holding member. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a roll paper holding device that rotatably holds roll paper obtained by winding a long print medium in a roll shape and guides both ends of the roll paper.

A printer is known as a roll paper holding device that holds roll paper. The printer includes a supply unit that rotatably holds roll paper obtained by winding a long print medium in a roll shape, and a printing unit that pulls out and conveys the roll paper held in the supply unit and performs printing. ing. In such a printer, when another roll paper having a different width is used, or when the paper is out of operation, an operation of replacing the roll paper is required.
In Patent Document 1, a holding shaft inserted into a paper tube of roll paper, a guide plate fixed to one end of the holding shaft, a slide guide plate detachably provided on the other end side of the holding shaft, There is a spacer that is sandwiched between the guide plate and the roll paper according to the width of the roll paper, and the other end surface of the roll paper is slid through the holding shaft so that one end surface of the roll paper is guided by the guide plate A roll paper holder for setting a roll paper at the center by guiding with a guide plate is disclosed.

JP 2006-315791 A

However, in Patent Document 1, each time the roll paper is replaced, the slide guide has to be detached from the holding shaft, and the replacement work is complicated. In addition, a spacer is necessary only when the width of the roll paper to be set is narrow, and if the roll paper is mistakenly wide, if the spacer is used, the roll paper is set at a position shifted from the center of the roll paper holder. There was a fear.
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a roll paper holding device that facilitates roll paper replacement work.

A roll paper holding device according to the present invention is a roll paper holding device that holds roll paper obtained by winding a long paper into a roll shape, and a pair of guide surfaces that guide the side surfaces of the roll paper are arranged to face each other. A guide member, a holding member that is provided in each of the holes of the pair of guide members and holds the roll paper, and a biasing member that biases each holding member to a position protruding from the guide surface toward the other holding member; It is characterized by having.
Further, the holding member has a spherical surface for holding the roll paper.

  Since the holding member is biased to a position protruding from the guide surface of the guide member, each holding member is biased toward the hole by the both end surfaces of the roll paper by inserting the roll paper between the pair of guide members. It is possible to hold a roll paper by pushing it against the space to secure a space for inserting the roll paper, and when the holding member is positioned at the paper tube position of the roll paper, the holding member enters the paper tube by the biasing force. The roll paper can be loaded with a simple operation.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. An example in which the roll paper holding device of the present invention is applied to a printer such as a printer will be described.

FIG. 1 is a schematic side view according to an embodiment of a printer including a roll paper holding device of the present invention, and FIG. 2 is a perspective view of an opened state in which a cover of the printer is opened.
The printer 1 includes a main body 10 and a cover 11 that can rotate with respect to a support shaft 12 of the main body 10. The printer 1 includes a supply unit 2, a sensor 3, and a printing unit 4 as an internal configuration of the printer 1. . In the main body 10, a supply unit 2 as a roll paper holding device 20, which will be described later, which holds a roll paper 40 in which a long paper 41 is wound around a roll-shaped paper tube 42, a sensor 3, and a printing unit 4. A platen roller 6 is provided. The sensor 3 can recognize the position of the paper 41 by detecting the paper 41 drawn from the roll paper 40. The printing unit 4 includes a thermal head 5 and a platen roller 6. The thermal head 5 is provided on the cover 11 side, and the platen roller 6 is provided on the main body 10 side. With such a configuration, a large space for loading the roll paper 40 to the supply unit 2 in the open state shown in FIG. In the closed state, the sheet 41 is nipped and conveyed by the platen roller 6 and the thermal head 5, and predetermined information can be printed on the sheet 41 by the heat generated by the thermal head 5. The printed paper 41 is discharged from a discharge port 16 that is a gap between the main body 10 and the cover 11.

  The cover 11 is configured to be openable and closable while being guided by a guide plate 31 that supports the cover 11 in the open state shown in FIG. The guide plate 31 is an arc-shaped member centered on the support shaft 12, and one end thereof is fixed to the cover 11, and the release end side is inserted through the opening 32 formed in the main body 10 to open the cover 11. The guide plate 31 is projected and retracted from the opening 32 when in the state, and the guide plate 31 is accommodated in the opening 32 when in the closed state.

  The guide plate 31 is made of an elastic material, can be bent with elasticity toward the slit 29 formed in the guide plate 31, and the outer periphery of the guide plate 31. A cover stopper 33 formed so as to protrude from the surface is provided, and when the cover 11 is opened by a predetermined angle or more, the cover stopper 33 is pulled out from the opening 32 and elastically contacts the surface side of the edge of the opening 32. Thus, the cover 11 can be supported in the open state shown in FIG.

  In addition, a lock member 34 that maintains the cover 11 in a closed state is provided in the vicinity of the end of the cover 11 opposite to the side on which the guide plate 31 is provided. The lock member 34 has a hook shape at the tip, and the hook is engaged with the engagement hole 35 provided in the main body 10 to maintain the closed state, and the engagement of the hook with the engagement hole 35 is released. Thus, the cover 11 can be opened.

Next, the configuration of the roll paper holding device will be described. 3 is a cross-sectional view of the roll paper holding device on line AA in FIG. 2, FIG. 4 is a cross-sectional view showing a state when roll paper is loaded in the roll paper holding device, and FIG. It is sectional drawing which shows the state which loaded the roll paper in the roll paper holding | maintenance apparatus. The roll paper holding device 20 is provided at intervals in a direction orthogonal to the conveyance direction of the paper 41 (width of the paper 41), and a pair of guide members 21 in which guide surfaces 21a for guiding both side surfaces of the roll paper are arranged to face each other. And a holding member 22 that is provided in the vicinity of the upper end of the guide member 21 so as to protrude from each guide member 21 in the direction toward the other guide member and holds the paper tube of the roll paper. . The holding member 22 includes a holding piece 23 having a hemispherical spherical surface 23a, a flange piece 24 disposed on the opposite side of the spherical surface 23a and integrally formed with the holding piece 23, and a holding piece 23 opposite to the holding piece 23 of the flange piece 24. A shaft 25 planted in the direction is provided. In addition, a coil spring 26 as an urging member is provided outside the shaft 25, and the holding member 22 is disposed in a hole 27 formed inside the guide member 21, and the holding piece 22 extends from the guide surface 21 a of the guide member 21. 23 spherical surfaces 23a are configured to be capable of appearing and retracting. The coil spring 26 is provided between the inner wall of the hole 27 of the guide member 21 and the flange piece 24, and biases the flange piece 24 away from the inner wall of the hole 27 (approaching toward another guide member). Further, the holding member 22 is configured not to jump out of the hole 27 and to be detached when the flange 24 is caught on the inner wall on the open end side of the hole 27.
In addition, a rack gear 45 (see FIG. 2) is integrally formed at the lower end of each guide member 21, and a pair of guide members are engaged with a pinion gear (not shown) rotatably provided on the bottom of the main body 10. 21 is movable in the contact / separation direction. The guide member 21 has a fixing member (not shown) and can be fixed at a predetermined position with respect to the main body 10.

  A procedure for loading roll paper into the roll paper holding device configured as described above will be described. First, one guide member is moved toward the other guide member, and the distance between the pair of guide members 21 is fixed at a position slightly wider than the width a of the roll paper 40 (see FIG. 4) by the pinion gear and the rack gear 45. . Before the roll paper 40 is loaded, as shown in FIG. 3, the holding member 22 protrudes from the guide surface 21a to the other guide member to the maximum by the urging force of the coil spring 26.

As shown in FIG. 4, when the roll paper 40 is inserted between the pair of guide members 21, the holding members 22 are pushed toward the holes 27 by the both end surfaces of the roll paper 40 (against the biasing force of the coil spring 26). By inserting, a space for inserting the roll paper 40 having the width a is secured, and the holding member 22 is accommodated in the hole 27. By holding the holding member 22 in the hole 27, the holding piece 23 does not protrude from the guide surface 21 a, and the roll paper is pressed while pushing the holding member 22 outward (direction in which the holding members 22 are separated from each other) by the end face of the roll paper 50. 40 is loaded. As shown in FIG. 5, when the paper tube 42 is positioned at the holding piece 23, the holding piece 23 enters the inner diameter b of the paper tube 42 by the restoring force (biasing force) of the coil spring 26, and the paper tube is formed on the spherical surface 23 a of the holding piece 23. 42 is held.
Further, when removing the roll paper 40 from the roll paper holding device 20, the distance between the guide members 21 by pulling the roll paper 40 upward and pushing the holding members 22 outward by the both end faces of the roll paper as described above. Remove by spreading.

  Even the roll paper 50 having the paper tube 51 having the inner diameter c smaller than the inner diameter b of the paper tube 42 of the roll paper 40 can be held by the holding piece 23. FIG. 6 is a view showing a state in which the roll paper 50 is loaded in the paper holding device. As shown in FIG. 6, the inner diameter c of the paper tube 51 can be held near the tip side of the spherical surface 23a. As described above, the roll paper can be held in the roll paper holding device even when the roll paper has the same width a and the paper tubes have different inner diameters. FIG. 7 is a diagram for explaining the relationship between the inner diameter of the paper tube and the holding piece. If the inner diameter X of the paper tube is equal to or smaller than the diameter Y of the holding piece 33 as shown in FIG. The paper can be held firmly. Even if the inner diameter X of the paper tube is equal to or larger than the diameter Y of the holding piece 33, the inner diameter X can be hooked and held on the holding piece 33.

Note that the present invention is not limited to the above-described embodiments, and it is obvious that the embodiments can be appropriately changed within the scope of the technical idea of the present invention. In addition, the number, position, shape, and the like of the constituent members are not limited to the above-described embodiment, and can be set to a number, position, shape, and the like that are suitable for implementing the present invention.

1 is a schematic side view of a printer including a roll paper holding device according to an embodiment of the present invention. It is a perspective view of the open state which opened the cover of the printer. It is sectional drawing of the roll paper holding | maintenance apparatus on the AA line in FIG. It is sectional drawing which shows a state when the roll paper is loaded into the roll paper holding device. It is sectional drawing which shows the state which loaded the roll paper in the roll paper holding | maintenance apparatus. FIG. 6 is a cross-sectional view showing a state in which another roll paper having a narrow paper tube width is loaded into the roll paper holding device. It is explanatory drawing explaining the relationship between the internal diameter of a paper tube, and a holding piece.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Printer 2 Supply part 3 Sensor 4 Printing part 5 Thermal head 6 Platen roller 10 Main body 11 Cover 12 Holding shaft 16 Discharge port 20 Roll paper holding | maintenance apparatus 21 Guide member 21a Guide surface 22 Holding member 23 Holding piece 23a Spherical surface 24 Nail piece 25 Axis 26 Coil spring 27 Hole 29 Slit 31 Guide plate 32 Opening 33 Cover stopper 34 Lock member 35 Engagement hole 40 Roll paper 41 Paper 42 Paper tube 45 Rack gear 50 Roll paper 51 Paper tube

Claims (2)

A roll paper holding device for holding roll paper obtained by winding a long paper into a roll shape,
A pair of guide members in which guide surfaces for guiding the side surface of the roll paper are arranged opposite to each other;
A holding member that is provided in each of the holes of the pair of guide members and holds the roll paper;
An urging member that urges each holding member to a position protruding from the guide surface toward the other holding member. The roll paper holding device according to claim 1, wherein the holding member has a spherical surface for holding the roll paper.

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