JP2005238752A - Printer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a printer by which the fitting work of a printing paper can be performed by both hands without being obstructed by a damper roller, and which can easily and surely fit the printing paper. <P>SOLUTION: A damper holder 52 is turned counterclockwise while resisting the urging force of a torsion spring 54 from a set position, and an engaging shaft 58 protruding from the damper holder 52 is fastened to a stopper 7, and thus, a tamper section 5 is held at a retracted position. When the tamper section 5 is located at the retracted position, the damper roller 53 is retracted to a location above the carrying route of the printing paper, and at the same time, a guide plate 55 is retracted to a location above the carrying route of the printing paper as well. Therefore, when the printing paper (rolled paper) is fitted from a side, an obstacle does not exist, and the printing paper (rolled paper) can easily be fitted. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a printer that uses roll paper around which printing paper is wound, and more particularly, to a printer having a damper roller for suppressing fluctuations in load applied to the drawing of printing paper.

  In a printer that pulls out the roll paper supported by the paper supply shaft by the rotation of the platen roller and holds the drawn print paper between the thermal head and the platen roller for printing, reverse the platen roller to return the print paper. When the paper is conveyed in the direction or due to a change in the printing speed (conveying speed), the drawn printing paper becomes slack. If the slack of the printing paper occurs, the printing paper is transported with a light force until the slack disappears at the next printing, and when the slack disappears, the roll paper is suddenly tensioned. The load suddenly changes, resulting in a decrease in printing accuracy such as a printing position shift or printing expansion / contraction.

  Therefore, the damper roller arranged on the upstream side of the thermal head is urged in the direction of the printing paper to press the printing paper, to give a predetermined range of tension to the drawn printing paper, and to reduce the load applied to the drawing of the printing paper. A configuration that suppresses fluctuations is employed (see, for example, Patent Document 1).

However, in the prior art, when the printing paper is loaded, the damper roller exists in the printing paper conveyance path. Therefore, the printing paper must be loaded only with the other hand while pressing the damper roller with one hand. The mounting work becomes difficult, and there is a problem that it is not possible to easily mount the printing paper.
JP 2000-016651 A

  SUMMARY OF THE INVENTION The present invention has been made in view of such problems, and the object of the present invention is to be able to perform printing paper mounting work with both hands without being disturbed by a damper roller, and to perform printing easily and reliably. The object is to provide a printer capable of loading paper.

In order to solve the above problems, the present invention has the following configuration.
The gist of the invention described in claim 1 is a printer that performs printing on the printing paper drawn from the roll paper, and applies a predetermined range of tension to the drawn printing paper, and fluctuations in the load applied to the drawing of the printing paper. Damper means for restraining the damper, locking means for locking the damper means at the retracted position where the damper means is retracted from the conveyance path of the printing paper, and release means for releasing the locking of the damper means by the locking means. It exists in the printer characterized by doing.
According to a second aspect of the present invention, the damper means is rotatably supported on a damper holder rotatably supported by a damper support shaft that is cantilevered on a side plate, and on a free end side of the damper holder. 2. The printer according to claim 1, further comprising: a damper roller; and an urging unit that urges the damper holder in a direction in which the damper roller presses the printing paper.
According to a third aspect of the present invention, the damper holder is provided with a guide plate for guiding the conveyance of the printing paper, and when the damper means is locked at the retracted position, 3. The printer according to claim 2, wherein the guide plate is also retracted from the conveyance path of the printing paper.

  Since the printer according to the present invention is configured such that the damper roller is held at the retracted position, the damper roller can be mounted with both hands while the damper roller is retracted from the printing paper conveyance path. There is an effect that the printing paper can be mounted surely and easily without being disturbed.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic side view showing a configuration of an embodiment of a printer according to the present invention, and FIG. 2 is a schematic perspective view showing a state when the damper portion shown in FIG. 1 is in a set position. 3 is a schematic perspective view showing a state when the damper portion shown in FIG. 1 is in the retracted position, and FIG. 4 is a cross-sectional view showing a configuration of the damper roller shown in FIG.

  Referring to FIG. 1, the printer according to the present embodiment is pulled out by a paper supply shaft 2 that supports the roll paper 1 around which the print paper 11 is wound, a platen roller 3 that pulls out the print paper 11 from the roll paper 1, and the printer. The printing paper 11 is sandwiched between the platen roller 3 and a thermal head 4 for printing on the printing paper 11 and a damper section 5 that suppresses fluctuations in the load applied to the drawing paper 11. A damper roller 53 rotatably supported by a damper holder 52 that is rotatably supported around a damper support shaft 51 is configured to press the printing paper 11. In addition, as the printing paper 11, a label continuous body in which labels are temporarily attached to a belt-like mount at predetermined intervals may be used.

  2 and 3, the damper unit 5 has a damper holder 52 rotatably supported on a damper support shaft 51 that is cantilevered by the side plate 6, and damper rollers 53 on both sides of the free end side of the damper holder 52. Is supported rotatably. A torsion spring 54 is mounted on the damper support shaft 51, and the torsion spring 54 is engaged with a damper rotation restricting projection 61 provided at one end of the side plate 6 and engaged with the damper holder 52 at the other end. Thus, the damper holder 52 is urged in a clockwise direction, that is, in a direction in which the damper roller 53 rotatably supported on both sides of the damper holder 52 is pressed against the printing paper 11.

  A guide plate 55 that guides the conveyance of the drawn printing paper 11 is attached to the damper holder 52, and a guide knob 57 is provided along a guide plate guide port 56 formed in a direction orthogonal to the conveyance direction of the printing paper 11. By moving, the guide plate 55 can be slid in a direction orthogonal to the conveyance direction of the printing paper 11, and the guide plate 55 can be fixed by rotating the guide knob 57.

  Referring to FIG. 4, the damper roller 53 is a free roller that rotates together with the engagement shaft 58 supported on both sides of the damper holder 52 on the free end side. The end portion of the engagement shaft 58 from the side plate 6 is shown in FIG. As shown to (a), it protrudes from the damper holder 52 so that it may be latched by the stopper 7 provided in the side plate 6, and the release knob 59 is attached to the other end part. The engagement shaft 58 is slidable in the axial direction. Normally, the end of the engagement shaft 58 on the side plate 6 side is separated from the damper holder 52 by the biasing force of the spring 60 as shown in FIG. As shown in FIG. 4B, the engaging shaft 58 protruding from the damper holder 52 is retracted by pulling the release knob 59 against the biasing force of the spring 60.

Next, the mounting operation of the printing paper 11 (roll paper 1) of the present embodiment will be described in detail.
FIG. 2 shows a state in which the damper portion 5 is at the set position. The damper holder 52 is urged clockwise by the torsion spring 54, and the damper roller 53 is pressed against the printing paper 11 and pulled out. A predetermined range of tension is applied to the printed paper 11. Note that the lower limit position of the damper roller 53 is regulated by a damper part rotation regulating convex part 61 (see FIG. 3) that regulates the lower limit position of the damper holder 52.

  When the printing paper 11 (roll paper 1) is loaded, first, the guide knob 57 is moved to move the guide plate 55 to the front side, that is, to a position corresponding to the maximum width of the printing paper 11 to be loaded.

  Next, the damper holder 52 is rotated counterclockwise against the urging force of the torsion spring 54 from the set position shown in FIG. 2, and the engaging shaft 58 protruding from the damper holder 52 is engaged with the stopper 7. The tamper portion 5 is held at the retracted position shown in FIG. When the tamper portion 5 is in the retracted position, the damper roller 53 is retracted above the transport path of the printing paper 11 and the guide plate 55 is also retracted above the transport path of the printing paper 11. Accordingly, there is no obstacle when the printing paper 11 (roll paper 1) is loaded from the side, and the printing paper 11 (roll paper 1) can be easily loaded.

  After the printing paper 11 (roll paper 1) is mounted, the release knob 59 is pulled in the direction indicated by the arrow in FIG. 3, whereby the engagement shaft 58 protruding from the damper holder 52 is retracted, and the engagement shaft 58 is locked by the stopper 7. Is released, the damper holder 52 is urged clockwise by the torsion spring 54, and the damper portion 5 returns to the set position shown in FIG.

  Finally, the guide knob 57 is moved to move to a position corresponding to the width of the printing paper 11 on which the guide plate 55 is mounted. When the printing paper 11 having the same width as that used before is mounted, the movement of the guide plate 55 may be omitted.

  As described above, according to the present embodiment, by configuring the damper unit 5 to be held at the retracted position, printing is performed with both hands while the damper roller 53 is retracted from the conveyance path of the printing paper 11. Since the sheet 11 can be mounted, the printing sheet 11 can be mounted reliably and easily without being interrupted by the damper roller 53.

  In the present embodiment, the engagement shaft 58 protruding from the damper holder 52 is retracted so that the engagement shaft 58 is unlocked by the stopper 7. However, the stopper 7 is moved to stop the stopper shaft. 7 may be configured such that the engagement shaft 58 is unlocked, and a mechanism for releasing the engagement shaft 58 from the stopper 7 is a door that is opened when the printing paper 11 is replaced. The interlocking may be performed so that the locking of the engaging shaft 58 by the stopper 7 is released when the door is closed.

  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 suitable number, position, shape, and the like in practicing the present invention. In each figure, the same numerals are given to the same component.

1 is a schematic side view illustrating a configuration of an embodiment of a printer according to the present invention. It is a schematic perspective view which shows a state when the damper part shown in FIG. 1 exists in a set position. It is a schematic perspective view which shows a state when the damper part shown in FIG. 1 exists in a retracted position. It is sectional drawing which shows the structure of the damper roller shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Roll paper 2 Paper supply axis | shaft 3 Platen roller 4 Thermal head 5 Damper part (damper means)
6 Side plate 7 Stopper (locking means)
11 Printing paper 51 Damper support shaft 52 Damper holder 53 Damper roller 54 Torsion spring (biasing means)
55 Guide plate 56 Guide plate guide port 57 Guide knob 58 Engagement shaft 59 Release knob (release means)
60 Spring 61 Damper rotation restricting projection

Claims (3)

A printer that performs printing on printing paper drawn from roll paper,
Damper means that applies a predetermined range of tension to the drawn printing paper and suppresses fluctuations in the load applied to the printing paper;
Locking means for locking the damper means at a retracted position retracted from the conveyance path of the printing paper;
A printer comprising: release means for releasing the lock of the damper means by the lock means. The damper means includes a damper holder rotatably supported by a damper support shaft that is cantilevered by a side plate,
A damper roller rotatably supported on the free end side of the damper holder;
2. The printer according to claim 1, further comprising a biasing unit that biases the damper holder in a direction in which the damper roller presses the printing paper. The damper holder is provided with a guide plate for guiding the conveyance of the printing paper,
3. The printer according to claim 2, wherein when the damper means is locked at the retracted position, the guide plate is also retracted from the printing paper conveyance path.

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