JPH03270956A - Printer - Google Patents

Abstract

PURPOSE:To make it possible to print in a good condition regardless of thickness and step of a printing paper by providing printing paper distinguishing means for distinguishing the printing paper whether it has steps or not and gap adjusting means for adjusting gaps between a paper guide and the printing paper. CONSTITUTION:Printing paper distinguishing means 4 distinguishes a printing paper 100 drawn between a platen 1 and a paper guide 3 whether it has a step or not. A distinguishing signal thereof is inputted to print head gap adjusting means 5. When the inducted printing paper 100 has no step, the gap adjusting means 5 forms a predetermined space between the paper guide 3 and the printing paper 100. When the inducted printing paper 100 has a step, the gap adjusting means 5 adjusts the paper guide 3 and the printing paper 100 to be always in contact with each other tightly.

Description

[Detailed Description of the Invention] [Summary] Regarding a printer that can use both printing paper with a step and a printing paper without a step, it is possible to The purpose is to enable printing in good condition on printing paper, and whether or not the printing paper has a step when sucked in between the platen and paper guide. a printing paper discriminating means for discriminating the printing paper, and a discrimination signal from the printing paper discriminating means is manually input to form a predetermined interval between the paper guide and the printing paper when the printing paper has no level difference; When the printing paper has a step, a gap adjustment means is provided to ensure that the paper guide and the printing paper are always in close contact with each other.

[Industrial application field]

The present invention relates to a printer that can use both printing paper with steps and printing paper without steps.

There are various types of printing paper used in printers, but for example, in passbook printers used at banks, etc.
Printing paper with steps (passbook) and printing paper without steps (
It is desirable to be able to print documents (such as slips) using the same printer.

[Conventional technology]

In conventional printers, the distance between the paper guide attached to the print head and the printing paper (paper gap)
There are printers that have a paper gap at a predetermined interval when printing paper is sucked in, and printers that have paper guides that are always in close contact with the printing paper.

[Problem to be solved by the invention]

However, in printers that are designed so that the paper gap is at a predetermined interval when printing paper is sucked in, when printing on printing paper with steps such as bankbooks, the paper gap becomes larger from the middle, and printing becomes difficult. It becomes pale and difficult to read, or conversely, there is not enough paper gap halfway through,
There were drawbacks such as paper jams.

In addition, in printers in which the paper guide is always in close contact with the printing paper, the platen or paper guide is biased with a spring and lightly pressed against the printing paper in order to maintain close contact, so thin printing paper When using this method, there was a drawback that the printing paper was dragged by the paper guide and a paper jam occurred.

As described above, in the past, it was difficult for any printer to print in good condition on both printing paper with steps and thin printing paper.

The present invention eliminates such drawbacks of the conventional printer and provides a printer that can print in good condition on any type of printing paper, regardless of the thickness of the printing paper or the presence or absence of steps. The purpose is to

[Means to solve the problem]

In order to achieve the above object, the printer of the present invention has a first
As shown in the figure, the printing paper 100 is placed in close contact with the platen 1, the paper guide 3 is provided in front of the print head 2 facing the platen 1, and the printing is performed between the platen 1 and the paper guide 3. When the paper 100 is sucked in, the printing paper discriminating means 4 determines whether the printing paper 100 has a step or not, and the discrimination signal from the above-mentioned printing paper discriminating means 4 is input, and the printing paper 100 is If there is no step, a predetermined interval is formed between the paper guide 3 and the printing paper 100, and if the printing paper 100 has a step, a predetermined interval is formed between the paper guide 3 and the printing paper 100.
It is characterized in that it is provided with a gap adjustment means 5 for making sure that the two are always in close contact with each other.

[Effect]

The printing paper determining means 4 determines whether or not the printing paper 100 sucked between the platen l and the paper guide 3 has a step, and the determination signal is manually applied to the rad gap adjusting means 5 for printing. do.

Then, when the sucked printing paper 100 has no level difference, a predetermined gap is formed between the paper guide 3 and the printing paper 100 by the gap adjustment means 5,
When the drawn printing paper 100 has a difference in level, the gap adjustment means 5 adjusts the paper guide 3 and the printing paper 100 so that they are always in close contact with each other.

〔Example〕

Examples will be described with reference to the drawings.

FIG. 2 is a schematic diagram of the printer, in which a non-rotating platen 1 is provided in the printing section, and the printing paper 100 is moved from the left to the right in FIG. 2 in close contact with the platen 1. transported.

A paper guide 3 having a flat surface facing the platen 1 is provided on the front side of the print head 2 provided facing the platen 1.
is installed. The platen 1 is supported by a bracket 52 while being urged toward the paper guide 3 by a compression coil spring 51.

Further, by a cam 54 whose rotation angle is controlled by a step motor 53, the bracket 52 and the platen I move forward and backward in the six directions of arrows, that is, in the direction perpendicular to the surface of the printing paper 100.

In the paper transport path 11, a large number of paper transport rollers 12 are arranged at intervals. 13 is a stacker for receiving the ejected printing paper 100.

The paper insertion slot includes a cut paper insertion slot 14 and a passbook insertion slot 15, which are provided separately and merge into one paper transport path 11 inside the printer. A magnetic stripe reader 4 is provided inside the passbook insertion slot 15 for reading a magnetic recording section (magnetic stripe) attached to the passbook.

A control unit 50 includes a central processing unit (CPU) and the like, and controls the rotation angle of the step motor 53. In this control unit 50, when a magnetic stripe detection signal (hereinafter simply referred to as a "detection signal") is not inputted from the magnetic stripe reader 4, it recognizes that the inserted printing paper 100 is a cut sheet with no steps. , the inserted printing paper 10 only when the detection signal is input.
0 is recognized as a bankbook with steps.

3 is a front view of the printing section, and FIG. 4 is a side view. In order to insert the printing paper 100 between the platen l and the paper guide 3, a cam is inserted so that the gap between them is maximized. 54 is rotated. Reference numeral 21 denotes a carriage to which the print head 2 is attached, and moves along a guide stay 22 in the direction of arrow B, that is, parallel to the platen 1.

The cam 54 is a thinly wound cam whose radius gradually changes as it rotates, and a fixed disk 55 is fixed to the bracket 52 so as to be in constant contact with the surface of the cam 54. 5
Reference numeral 6 denotes a stopper that restricts the movement of the platen 1 urged by the compression coil spring 51 at a certain position. Reference numeral 57 denotes an optical sensor provided on the bracket 52 and the platen l in order to detect the reference position where the paper guide 3 and the printing paper 100 are in contact with each other.

In the state shown in FIGS. 3 and 4, the cam 54 is in contact with the fixed disk 55 at the part with the smallest radius, but when the cam 54 is rotationally driven by the step motor 53, the bracket 52 is moved as shown in the arrow. By moving in six directions, the distance between the platen l and the paper guide 3 changes.

FIG. 5 shows automatic control of the distance (paper gap) between the printing paper 100 and the paper guide 3 after the printing paper 100 is sucked into the printing section under the conditions shown in FIGS. 3 and 4. 5 is a flowchart showing the operation of the processing unit 50 for the processing. Hereinafter, the paper gap control operation will be explained with reference to FIG. 5 and FIG. 6 and the subsequent figures.

When a passbook is inserted through the passbook insertion slot 15 and the magnetic stripe of the passbook is read by the magnetic stripe reader 4, it is recognized that the inserted paper is a stepped printing paper. In other cases, it is recognized that a printing paper with no level difference has been inserted (s1).

Then, before the printing paper 100 reaches the printing section, the distance between the platen 1 and the paper guide 3 is set to the maximum state shown in FIGS. 3 and 4 (s2).

When the printing paper 100 reaches the printing section, as shown in FIGS. 6 and 7, the optical sensor 57
The step motor 53 rotates the cam 54 until it turns on, and the step motor 53 is stopped at the reference position (s3).

Next, when the printing paper 100 has no level difference, the cam 54 is reversely rotated by a predetermined angle in the direction of arrow C, as shown in FIGS. 8 and 9. As a result, the distance between the paper guide 3 and the printing paper 100 becomes a predetermined paper gap t, and the printing paper 100
Paper jam etc. will not occur even if the thickness of the paper is thin (s5).

However, when the printing paper 100 is a passbook, that is, one with steps, as shown in FIGS. 10 and 11,
Then, the cam 54 is rotated so that the maximum radius position of the cam 54 comes into contact with the fixed disk 55, and the bracket 52 is pushed toward the print head 2 side to the maximum extent.

At this time, the platen l has already collided with the paper guide 3 with the printing paper 100 in between, so it does not move.

Therefore, the platen l is pressed against the printing paper 100 while being biased by the compression coil spring 51, and the printing paper 100 is pressed against the printing paper 100.
Even if there is a step in the middle of 00, the paper guide 3 and platen 1 always come into close contact with the printing paper 100. As a result, it is possible to always print in good condition even on bankbooks with uneven surfaces, and even if the printing paper 100 becomes thick on the way, the platen l will move accordingly, so paper jams will not occur. No (S6).

〔Effect of the invention〕

According to the printer of the present invention, it is determined whether or not the printing paper inserted into the printer has a level difference, and if the paper does not have a level difference, the paper guide and the printing paper are set at a predetermined interval. When there is a step in the paper, the paper guide and the printing paper are always in close contact with each other, so it has the excellent effect of being able to perform high-quality printing under good conditions on any printing paper. have

[Brief explanation of drawings]

Fig. 1 is a configuration diagram of the present invention, Fig. 2 is a schematic diagram of a printer of an embodiment, Fig. 3 is a partial front view of the embodiment, Fig. 4 is a partial side view of the embodiment, and Fig. 5 is an implementation. 6 is a partial front view of the embodiment during operation; FIG. 7 is a partial side view of the embodiment during operation; FIG. 8 is a partial front view of the embodiment after operation; The figure is a partial side view of the embodiment after operation, No. 10.
The figure is a partial front view of the embodiment after operation, and FIG. 11 is a partial side view of the embodiment after operation. In the figure, l... Platen, 2... Print head, 3... Paper guide, 4... Print paper discrimination means, 5... Gap adjustment means, ioo... Print paper. Partial view of the example] Front view Figure 4: Keisho front view of the actual example Figure 3: Processing flow diagram of the example Figure 5: t&Imasa main front 61i during operation of the example Vessel after operation of the 8th example Front view Figure 8 Actual M! ! FIG. 7 FIG. 9 Partial front view of the moving mechanism of the embodiment FIG. 10 After operation of the embodiment v') Part ia' side view

Claims (1)

[Scope of Claims] A platen (1) to which printing paper (100) is in close contact; a paper guide (3) provided in front of a print head (2) facing the platen (1); printing paper determining means (4) for determining whether or not the printing paper (100) has a step when sucking the printing paper (100) between the printing paper (1) and the paper guide (3); A discrimination signal from the printing paper discriminating means (4) is input, and if the printing paper (100) has no level difference, a predetermined interval is set between the paper guide (3) and the printing paper (100). and when the printing paper (100) has a step, the paper guide (3) and the printing paper (
100) and gap adjustment means (5) for always ensuring close contact between the printer and the printer.