JP2005297412A - Curl correction device for rolled recording paper of portable printer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problems that various conventional curl correction devices for various kinds of rolled thermal recording paper occupy a large space and have a complex constitution and are structurally difficult to be used in a handy terminal portable printer because they require a drive motor of a big power for applying a large tension to the recording paper so as to remove the curl and that they are difficult to use in the portable printer from a view point of the capacity of the driving motor driven by a battery. <P>SOLUTION: In the apparatus, a correction plate of a shape to surround a cutter blade in a circle is arranged immediately after a platen roller which sends out the rolled thermal recording paper. The rolled thermal recording paper sent out from the platen roller is held by the platen roller, the cutter and the correction plate. A force in an opposite direction to a winding direction of the rolled thermal recording paper is applied, whereby the curl of the rolled thermal recording paper is corrected. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a curl correcting apparatus for correcting curling of a recording paper wound in a roll shape used in a portable printer.

Recently, handy terminals have come to be widely used for meter reading of gas, water, and power meters. This handy terminal reads the usage amount of gas, water, electric power, etc., and prints the result on the spot by a portable printer as a notification form, a receipt for automatic withdrawal from the bank account of the usage fee, etc. I have to.
Since the portable printer of the handy terminal is always carried and used, it is necessary to reduce the size and weight, so a line thermal printer using a roll-type thermal paper having a simple configuration is used.
In thermal printers that use roll-type thermal paper, the thermal recording paper is in a wound state and therefore has a curl that causes the paper to curl (so-called curl), and is conveyed by the platen roller and printed by the thermal head. However, there is a disadvantage that the curl is discharged while remaining.
When such curls are attached to the printing of notification slips, receipts of automatic withdrawals from bank accounts for usage fees, etc., the receipt itself will look bad and it will be difficult to store and organize the receipts. This causes a problem. In particular, a fee transfer slip for machine processing has a problem that accurate processing cannot be performed if curl is strong.
Various apparatuses for removing curl from the roll-shaped thermal recording paper and reducing the degree of curl have been proposed.

JP 05-058526 A, Japanese Patent Laid-Open No. 06-064808, JP 2003-118916 A, JP 2002-037496 A

Many of the conventionally proposed devices for removing curls from various roll-type thermal recording papers are placed in front of the drive unit such as a platen roller, which takes up space and has many complicated mechanisms. There was a problem that the cost increased.
Further, since a large tension is applied to the roll-shaped thermal recording paper in order to remove the curl, the drive motor must have a large power.
A portable printer for a handy terminal is driven by a battery because it is always carried and used, and miniaturization is required with a simple configuration in order to reduce its weight.
For this reason, it is structurally difficult to apply a conventional curl removing device having a space taking mechanism or a complicated mechanism to a portable printer of a handy terminal, and a drive motor driven by a battery is used. From the viewpoint of capability, it has been impossible to use a conventional device for removing curl.
On the other hand, the processing of the transfer slip of the usage fee printed by the portable printer and the receipt of the automatic withdrawal is performed by the machine, and higher quality is required.
Under such circumstances, there is a demand for the realization of a low-cost curling apparatus with a simple configuration that does not take up space that can be applied to a portable printer of a handy terminal and does not require a large power for a drive motor.

In the present invention, a correction plate having a shape surrounding a cutter blade in a circle is disposed immediately after a platen roller for feeding out a roll-shaped thermal recording paper, and the roll-shaped thermal recording paper fed from the platen roller is placed on the platen roller, the cutter and the correction. Rolled recording paper for portable printers that corrects curl of rolled thermal recording paper by passing a gap formed by a blade and applying a force opposite to the winding direction of the rolled thermal recording paper The above-mentioned conventional problem is solved by realizing the curl correcting apparatus.
The curl correcting apparatus for rolled recording paper according to the present invention has a simple configuration, so that curl correction can be performed at low cost without requiring large power for the drive motor.

The curl correction device for roll-shaped recording paper of the portable printer of the present invention is low in cost because of its simple structure, and is disposed at the recording paper discharge port, so that it is in front of a conventional drive unit such as a platen roller. It does not take up space as in the case of the apparatus arranged in the above, and does not interfere with the loading of the roll recording paper.
Further, since no tension is applied to the roll-shaped recording paper in order to remove the curl, the drive motor does not need a large power, so the curl can be removed even with the power of the drive motor driven by a battery. . Furthermore,
Since it can be arranged at the recording paper outlet, it is not necessary to change the design shape of the apparatus greatly.
By being disposed at the recording paper discharge port, the paper is not clogged because it is disposed at the recording paper discharge port that also serves as protection for the roller and the cutter.
It has many excellent features such as.

Hereinafter, a curl correcting device for a roll-shaped recording paper of a portable printer according to the present invention will be described with reference to the drawings.
FIG. 1 is a diagram for explaining a basic configuration of an embodiment of a curl correcting device for rolled recording paper of a portable printer according to the invention.
In FIG. 1, 1 is a roll-shaped thermal recording paper, and 2 is a platen roller that conveys the roll-shaped thermal recording paper. 3 is a printing head, 4 is a cutter, and 5 is a correction blade.
The roll-shaped thermal recording paper 1 is conveyed by the platen roller 2, and after printing by the printing head 3 is executed, it passes through the lower part of the cutter 4 and is discharged outside the printer.
The correction blade 5 has the same width as the roll-shaped thermal recording paper 1 and is arranged in a shape surrounding the blade of the cutter 4 in a circle immediately after the platen roller 2 that feeds the roll-shaped thermal recording paper.

The operation of the roll-shaped recording paper curl correcting apparatus configured as described above will be described below.
The roll-shaped thermal recording paper 1 delivered from the platen roller 2 is printed by the print head 3 and then passes through a U-shaped gap formed by the platen roller 2, the cutter 4 and the correction blade 5 to the outside of the printer. To be discharged. At this time, the roll-shaped thermal recording paper 1 is curled by a U-shaped gap so that its tip is pressed in the width direction of the correction blade 5 to cause a U-shaped bending at the contact position of the thermal recording paper. A U-shaped bending force opposite to that is applied, and the curling of the roll-shaped thermal recording paper can be corrected by this bending force.
When the roll-shaped recording paper curl correcting device of the present invention is not used, the curled and rounded recording paper can be obtained by using the roll-shaped recording paper curl correcting device of the present invention.
When the roll-shaped thermal recording paper was fed 20 cm, the curl was corrected to the extent that it was gently curved.

In the above embodiment, an example in which the thermal recording paper is used as the roll-shaped recording paper has been described. Even if it exists, it is applicable similarly.
As is clear from the above description, the curl removing apparatus for roll-shaped thermal paper of the present invention is simple in apparatus, so that curling can be corrected at low cost, and the roll is used to remove curl. Since no tension is applied to the recording paper, the drive motor does not need to have a large power, and the curl can be removed even with the power of the drive motor driven by a battery.
Furthermore, since it can be placed at the recording paper discharge port, there is no need to change the design shape greatly, it can also serve as a protection for rollers and cutters, and since it is placed at the recording paper discharge port, paper clogging does not occur, etc. It has the following characteristics.

  The present invention can be used in various industries that use portable printers.

FIG. 1 is a diagram for explaining a basic configuration of an embodiment of a curl correcting device for rolled recording paper of a portable printer according to the invention.

Explanation of symbols

1 ... Roll thermal recording paper,
2 ... Platen roller that conveys roll-shaped thermal recording paper
3 ... Print head,
4 ... Cutter
5 is a modified blade.

Claims (2)

In a portable printer in which a rolled recording paper is conveyed by a platen roller and printed by a print head, and then the printed recording paper is sent out through a cutter.
Immediately after the platen roller that feeds the roll recording paper, a correction blade having a width equivalent to that of the roll recording paper and surrounding the cutter blade in a circle is arranged,
The roll-shaped recording paper conveyed from the platen roller is passed through the gap formed by the platen roller, the cutter, and the correction blade, and a force opposite to the winding direction of the roll-shaped recording paper is applied to apply the roll-shaped recording paper. A curl correcting device for roll-shaped recording paper of a portable printer, wherein the curl is corrected. 2. The curl correction device for roll-shaped recording paper of a portable printer according to claim 1, wherein the roll-shaped recording paper is a roll-shaped thermal recording paper.

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