JP2834063B2 - Printer roll paper storage device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll paper storage device used for a printer for printing on roll paper, for storing roll paper and supplying the roll paper to a printing unit.

[0002]

2. Description of the Related Art FIG. 4 is a side view showing an example of a conventional roll paper storage device mounted on a printer, and FIG. 5 is a sectional view taken along the line BB of the example of FIG.

A conventional roll paper storage device used for a printer that prints on roll paper and stores the roll paper and supplies the roll paper to a printing section, as shown in FIG. (A width of 70 mm and a maximum diameter of 40 mm), and a holder 23 provided at the rear end of the holder 23 so as to be openable and closable with respect to the holder 23, and covers an upper portion of the roll paper 2 held by the holder 23. A cover 24 is provided, and the roll paper 2 is drawn out from a draw-out opening of a joint (contact portion) between the holder 23 and the front end of the cover 24 and supplied to the printing unit 8.

The printing unit 8 winds the roll paper 2 supplied from the roll paper storage device 21 around the platen 11, rotates the platen 11 by the transport motor 12, and transports the roll paper 2, while using the print head by the spring 10. 9 is pressed against the roll paper 2 to perform printing.

In the vicinity of the joint between the holder 23 and the cover 24, as shown in FIG. 5, the holder 23 and the cover 24 are parallel to the transport direction of the roll paper 2 and There are provided three rib-shaped (thickness: 2 mm) conveyance guides 25 and 26 provided perpendicular to the paper surface. Three transport guides 25 and 2
6 are provided at opposing positions, respectively.
Is closed and brought into contact with the holder 23, the transfer guide 25
It is configured such that there is a gap of about 1 mm between the transport guide 26 and the transport guide 26. The roll paper 2 is supplied to the printing unit 8 through this gap.

[0006]

As described above, in the conventional roll paper storage device, the load (pull-out load) when the roll paper is transported due to the rotation of the platen has a gap between the transport guides and the resistance is low. Because there is no roll paper, it is the weight of the roll paper and the frictional resistance between the roll and the inner surface of the holder and the cover.
Accordingly, as shown in the load characteristic 32 of FIG. 3 , when the diameter of the roll paper is large, the pulling load is large because of its own weight and the frictional resistance is large, but when the diameter of the roll paper is small, the pulling load becomes small. There is a drawback in that the paper is sagged, and the slack causes skew when the roll paper is transported, which may cause the roll paper to break or break. .

[0007]

According to the present invention, there is provided a roll paper storage device for a printer, comprising: a holder for mounting and holding roll paper therein; and a hinge at a rear end of the holder which can be opened and closed with respect to the holder. A cover that covers the top of the roll paper held by the holder by closing the roll paper, and pulls out the roll paper from a drawer of a joint between the holder and the cover and supplies the roll paper to a printing unit. A roll paper storage device for a printer, wherein a linear transport unit that guides the roll paper in a planar state is provided near the drawer outlet, and the holder and the cover of the linear transport unit are provided in the transport direction of the roll paper. A rib-shaped conveyance guide that is parallel and perpendicular to the paper surface of the roll paper is provided, and the number of the conveyance guides of at least one of the holder and the cover is reduced. Several, the position of one of the transport guides is set to an intermediate position between the other adjacent transport guides, and the tip of one of the transport guides projects toward the other side from the tip of the other transport guide, and The minimum value of the pulling load of the roll paper is set to a predetermined value or more by deforming the roll paper passing between them into a waveform, and in particular, the number of the transport guides of the holder is set to two, and the transport of the cover is performed. The number of guides is three.

[0008]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a front view of the linear transport section of FIG. 2 as viewed from the direction of arrow A, FIG. 2 is a side view showing an embodiment of the present invention mounted on a printer, and FIG. 3 is an embodiment of FIG. FIG. 9 is a characteristic diagram showing a comparison between the pulling load of the conventional roll paper storage device and the pulling load of the conventional roll paper storage device.

In FIG. 2, a roll paper storage device 1 includes a holder 3 for placing and holding a roll paper 2 (width 70 mm, maximum diameter 40 mm) therein, and a holder 3 at a hinge 1 a at the rear end of the holder 3. It can be opened and closed freely,
A cover 4 for covering the upper part of the roll paper 2 held by the holder 3 when the roll paper 2 is closed, and pulling out the roll paper 2 from the drawer opening 13 at the seam at the front end of the holder 3 and the cover 4 for printing Supply to section 8.

The configuration and operation of the printing unit 8 are the same as those of the printing unit shown in FIG.

In the vicinity of the draw-out opening 13 of the roll paper storage device 1, a linear transport section 7 for guiding the roll paper 2 in a flat state is provided. As shown in FIG.
The holder 2 has two rib-shaped (2 mm thick) transport guides 5, and the cover 4 has three transport guides 6 having a similar shape.
Is provided. The transport guides 5 and 6 are provided parallel to the transport direction of the roll paper 2 and perpendicular to the paper surface of the roll paper 2, and the two transport guides 5
It is provided in the middle of each adjacent transport guide 6.

The tips of the transport guides 5 and 6 are
And 0.2 to each other from the contact surface of the cover 4
It is made to protrude about 0.4 mm, and when viewed from the direction of arrow C, the tip portions of both are overlapped by about 0.4 to 0.8 mm. Note that the tip of one of the transport guides is a holder 3
And the same position as the contact surface of the cover 4, and by protruding only the tip of the other transport guide toward the other side, the length of the overlapping portion may be about 0.4 to 0.8 mm. . In short, irrespective of the relative position with respect to the holder 3 and the cover 4, the leading ends of the transport guides 5 and 6 are 0.4 to 0.8 m when viewed from the arrow C direction.
It is configured to overlap by about m.

By configuring the roll paper storage device 1 in such a manner, when the roll paper
Is transformed into a waveform by the transport guides 5 and 6 as shown in FIG. Therefore, when the roll paper 2 is transported by rotating the platen 11 by the transport motor 12 for printing, as shown in the load characteristic 31 of FIG. 3 , this deformation of the roll paper 2 becomes a load (pulling load), Tension is generated in the roll paper 2 between the platen 11 and the roll paper storage device 1.

The load characteristics 31 and 32 shown in FIG. 3 are obtained by measuring the pulling load of the roll paper 2 ten times and showing the average value. If the pulling load is 40 g or more, the skew of the roll paper does not occur. . In this embodiment, therefore, Figure 3
It can be understood from the load characteristics 31 that skew does not occur because the pulling load is 50 g or more. In addition, load characteristic 3
Maximum withdrawal load 1 for less than 10% of the drive torque of the transport motor 12 for rotating the platen 11, it is Rukoto to be sent transportable roll paper 2 without problems.

In the above-described embodiment, the number of the transport guides of the holder is two and the number of the transport guides of the cover is three. However, the number of the transport guides is at least one of the holder and the cover. Any number of guides may be used as long as they can guarantee a pulling load of 40 g or more.

[0017]

As described above, the roll paper storage device of the printer according to the present invention is provided with the linear transport section for guiding the roll paper in a planar state near the drawer, and the holder and cover of the linear transport section are provided in the linear transport section. A transport guide parallel to the transport direction of the roll paper and perpendicular to the paper surface of the roll paper is provided, at least one of the transport guides of the holder or the cover is provided in a plural number, and one transport guide is connected to the other. In the middle of an adjacent conveyance guide, the tip of one conveyance guide protrudes toward the other side from the tip of the other conveyance guide, and the roll paper passing between them is deformed into a waveform to reduce the pulling load of the roll paper. By setting the minimum value to a predetermined value or more, even if the diameter of the roll paper becomes small, a tension of a certain value or more is generated on the roll paper between the platen and the roll paper storage device. There is effect that it becomes possible,
Accordingly, there is an effect that it is possible to prevent the occurrence of skew and prevent the roll paper from being broken or torn during the transport of the roll paper.

[Brief description of the drawings]

FIG. 1 is a front view of the linear transport unit in FIG.

FIG. 2 is a side view showing a state in which one embodiment of the present invention is mounted on a printer.

FIG. 3 is a characteristic diagram showing a drawing load of the embodiment of FIG. 2 in comparison with a drawing load of a conventional roll paper storage device.

FIG. 4 is a side view showing a state in which an example of a conventional roll paper storage device is mounted on a printer.

FIG. 5 is a sectional view taken along line BB of the example of FIG. 4;

[Explanation of symbols]

 1.21 Roll paper storage device 1a Hinge section 2 Roll paper 3.23 Holder 4.24 Cover 5.6.25.26 Transport guide 7 Linear transport section 8 Printing section 9 Print head 10 Spring 11 Platen 12 Transport motor 13 Pull-out port 31 ・ 32 Load characteristics

Claims (2)

(57) [Claims] 1. A holder for mounting and holding roll paper therein, and a hinge portion at a rear end of the holder which is openable and closable with respect to the holder and is closed and held by the holder. and a cover for covering the upper portion of the roll paper, a roll paper compartment device of the printer supplies the print unit is drawn out of the roll from the outlet of the seams between the cover and the holder, the drawer of the holder the straight conveying section for guiding the roll paper to the portion in the vicinity of the mouth in a planar state provided, of the linear transport section of the holder
A rib-shaped transport guide parallel to the transport direction of the roll paper and perpendicular to the paper surface of the roll paper is provided on an upper surface and a portion facing the cover, and at least one of the holder and the cover is provided. The number of the transport guides is plural, the position of one of the transport guides is located at a position intermediate between the other adjacent transport guides, and the tip of one of the transport guides is closer than the tip of the other transport guide. A roll paper storage device for a printer, wherein a minimum value of a pull-out load of the roll paper is set to a predetermined value or more by deforming the roll paper protruding to the side and passing between them into a waveform. Wherein the two number of the conveyance guide of the holder, a roll paper compartment device of the printer according to claim 1, characterized in that a three the number of the conveyance guide of the cover.