JP2669196B2 - Printing medium transport method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a print medium carrying method in an automatic printing apparatus for carrying out printing after carrying a print medium to a predetermined position.

[0002]

2. Description of the Related Art FIG. 3 is a sectional view of a passbook printer, where 1 is a passbook, 1a is a passbook page, 2 is an insertion slot,
Reference numerals 5 and 6 are drive rollers, 7 and 7a are pressing rollers, 8 is a pinch roller, 9 is an arm, 10 is a print head, and 11 is a platen. Hereinafter, the problem of the conventional passbook transport method will be described with reference to FIG.

The passbook 1 inserted by the operator through the insertion slot 2
Is conveyed by the drive rollers 5 and 6 along the conveying path in the arrow direction. Then, when the column to be printed on the passbook 1 reaches the position directly below the print head 10, the printing is stopped by the print head 10 hitting the ribbon on the platen 11 to print. The presser roller 7 is arranged in the vicinity of the platen 11 at an intermediate point between the drive rollers 5 and 6, and serves to press the passbook 1 in order to prevent the pages of the passbook 1 from being turned over and preventing normal printing. There is a passbook 1
If the presser roller 7 is lowered before the tip of the press roller reaches the presser roller 7, as shown in the figure, page 1a of the passbook
However, there is a possibility that the sheet may get on the presser roller 7 and cannot be conveyed normally.

[0004] through in order to prevent such accidents, by the drive rollers 5, 6 in a state of lifting the presser roller 7 as shown in FIG. 3 to the position shown in 7a by the arm 9
The column to be printed in Book 1 reaches the position just below the print head 10.
The passbook 1 may be conveyed until the printing is completed, and then the press roller 7a may be lowered to the position shown in FIG. However, in this carrying method, the pressing roller 7 is used only for the purpose of pressing the passbook 1 and does not contribute to the carrying of the passbook 1. Therefore, when the length of the passbook 1 is shorter than the distance L1 between the drive rollers 5 and 6, the passbook 1 does not come into contact with any of the drive rollers 5 and 6, and the conveyance becomes impossible.

In the passbook printer, it is necessary to print a print medium having various lengths such as a form and a check in addition to the passbook, and the above-mentioned inconvenience may occur depending on the length of the print medium. In particular, platen for the purpose of using color ribbon
In a passbook printer having a wider width 11, the distance between the drive rollers 5 and 6 must be increased, and the above-described accident may occur frequently.

In order to avoid such a problem, the pressing roller 7 as well as the driving rollers 5 and 6 may be used to convey the passbook 1. Therefore, conventionally, the pressing roller 7
To start the conveyance of the passbook 1, and when the leading edge of the passbook 1 reaches the presser roller 7, the conveyance is stopped once, and the presser roller 7 is lowered to hold the passbook 1 and then the drive rollers 5, 6 and the presser foot. The conveyance of the bankbook 1 is resumed by the roller 7 and the column to be printed in the bankbook 1 is located immediately below the print head 10.
Was transported until it reached .

[0007]

However, if all the print media are stopped during the transportation,
The print area of the print medium should be located directly below the print head 10.
Print processing speed takes time to reach is lowered.

Accordingly, an object of the present invention is to improve the printing processing speed by detecting the length of a print medium and changing the transport method according to the result.

[0009]

[Means for Solving the Problems] The above problems are solved by a predetermined method.
And a drive row for transporting the print medium 7
It is placed at an intermediate point between the drive rollers 5 and 6 and the drive rollers 5 and 6.
The press roller 7 for pressing the print medium 1 and the print medium 1
Equipped with sensors 3a, 3b, 4a, 4b for detecting the length,
Hold the presser roller 7 when the print medium 1 is
And the conveyance of the print medium 1 is opened by the drive rollers 5 and 6.
Start before the leading edge of the print medium 1 reaches the presser roller 7.
Sensor 3a, 3b, 4a, 4b detects print media 1 length
However, the length of the print medium 1 is shorter than the distance between the drive rollers 5 and 6.
The printing medium 1 has reached the press roller 7
Sometimes the transport is stopped and the presser roller 7 is lowered.
Press the print medium 1, then drive rollers 5, 6 and presser
The conveyance of the print medium 1 is restarted by the roller 7,
1 The column to be printed reaches the position directly below the print head.
The print medium 1 until the length of the print medium 1
If the space between the rollers 5 and 6 is longer than the
The print head is the column to be printed on the print medium 1 without printing.
After transporting the print medium 1 until it reaches the position just below
The pressing roller 7 by tufts down as holding the printing medium 1
It was achieved by the printing medium conveying method characterized by.

[0010]

According to the present invention, after the conveyance of the printing medium 1 is started,
When the length of the print medium 1 is shorter than the distance between the drive rollers 5 and 6 by detecting the length of the print medium 1 by the sensors 3a, 3b, 4a, 4b, the print medium 1 is stopped and restarted on the print medium 1 as usual. of
Until the column to be printed reaches the position directly below the print head
Conveying the print medium 1, when the length of the print medium 1 is longer than the distance between the drive rollers 5 and 6, a sign without stopping
The column to be printed on the print medium 1 should be located directly below the print head.
Since the print medium 1 is conveyed until the print medium 1 arrives, the average print processing speed can be shortened compared to the conventional case when performing print processing on a large number of print media having various lengths.

[0011]

FIG. 1 is a cross-sectional view of a passbook printer showing an embodiment of the present invention, and those having the same functions as those in FIG. The light emitting element 3a and the light receiving element 3b are vertically arranged with the conveyance path of the passbook 1 interposed therebetween, and the light emitted from the light emitting element 3a is incident on the light receiving element 3b and causes the light receiving element 3b to generate a predetermined output. , The passbook 1 has a light emitting element 3a and a light receiving element 3b
When passing through, the emitted light is blocked and the output of the light receiving element 3b is reduced. Therefore, the CPU 12 can detect the passage of the passbook by monitoring the output of the light receiving element 3b. Further, the light emitting element 4a and the light receiving element 4b have the same functions as the light emitting element 3a and the light receiving element 3b, and are arranged at an interval equal to the interval L1 between the driving rollers 5 and 6, The output of 4b is monitored by the CPU 12. Therefore, when the outputs of the light receiving elements 3b and 4b decrease simultaneously, the CPU 12 determines that the length L2 of the passbook 1 is equal to the distance L1 between the drive rollers 5 and 6.
It can be judged to be longer.

FIG. 2 is a flowchart. Hereinafter, an embodiment of the present invention will be described with reference to FIGS. When the operator inserts the passbook 1 from the insertion slot 2, the light emitted from the light emitting element 3a is blocked by the passbook 1 and the output of the light receiving element 3b decreases. CPU
12 detects that the passbook 1 has been inserted due to a decrease in the output of the light receiving element 3b, and sends an up / down command to the drive mechanism 13. The drive mechanism 13 drives the arm 9 to the position shown by the dotted line, and raises the pressing roller 7 to the position shown by 7a (S1). Next, the CPU 12 sends a start command to the drive mechanism 13 to rotate the drive rollers 5 and 6 to start the conveyance of the passbook 1 (S
2).

Next, the CPU 12 determines whether or not the length L2 of the passbook 1 is longer than the interval L1 between the drive rollers 5 and 6 by monitoring the outputs of the light receiving elements 3b and 4b (S3).
If it is shorter, the conveyance is stopped when the leading end of the passbook 1 reaches the pressing roller 7 beyond the platen 11 (S4). Then, a lowering command is sent to the arm 9 to lower the press roller 7 (S5). Next, the CPU 12 sends a start command to the drive mechanism 13 to rotate the drive rollers 5, 6 and the pressing roller 7, and restarts the conveyance of the passbook 1 (S6). And the passbook 1 seal
The drive rollers 5, 6 and the press roller 7 are stopped when the column to be written is conveyed until reaching the position directly below the print head 10 (S7).

In S3, if the length L2 of the passbook 1 is longer than the distance L1 between the drive rollers 5 and 6, the drive rollers 5 and 6 are
Continues to carry the passbook 1 without stopping (S
8). The column to be printed in the passbook 1 is the true of the printhead 10.
The drive rollers 5 and 6 are stopped when they have been transported until they reach the lower position (S9). Next, the CPU 12 sends a lowering command to the arm 9 via the drive mechanism 13 to lower the press roller 7 and press the passbook 1 (S11). After the process of S7 or S10, the print head 10 prints by hitting the ribbon on the platen 11 (S11).

[0015]

According to the present invention, the transport is stopped and restarted as usual only when the length of the print medium is short, and when the length is long, the columns to be printed of the passbook 1 are printed without stopping the transport.
Since the sheet is conveyed until it reaches the position directly below the head 10, it is useful in improving the average print processing speed for print media of various lengths.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention;

FIG. 2 is a flowchart showing an embodiment of the present invention;

FIG. 3 is a sectional view showing a problem of the conventional example.

[Explanation of symbols]

1 passbook, 7, 7a presser roller, 1a passbook page, 8 pinch roller, 2 insertion slot, 9 arm, 3a, 4a light emitting element, 10 print head, 3b, 4b light receiving element, 11 platen, 5, 6 drive roller, 12 CPU, 13 drive mechanism,

Claims (1)

(57) [Claims] 1. A print medium, which is arranged so as to be separated for a predetermined period.
(1) A drive roller (5, 6) for transporting the print medium, and an intermediate point between the drive rollers (5, 6),
Presser roller (7) that holds (1) and sensors (3a, 3b, 4a, 4) that detect the length of print medium (1).
b), and when the printing medium (1) is inserted from the insertion slot (2),
The roller (7) and drive rollers (5, 6)
The conveyance of the body (1) starts, and before the leading end of the print medium (1) reaches the pressing roller (7),
The length of the print medium (1) is checked by the sliders (3a, 3b, 4a, 4b).
The length of the feed / print medium (1) is shorter than the distance between the drive rollers (5, 6).
In this case, the leading edge of the print medium (1) reaches the presser roller (7).
Stop feeding and lower the presser roller (7).
The print media (1) and then the drive rollers (5, 6) and
Transport of the print medium (1) is restarted by the presser roller (7)
However, the section to be printed on the print medium (1) is directly below the print head.
When the print medium (1) is conveyed until it reaches the position of, and the length of the print medium (1) is equal to or more than the distance between the drive rollers (5, 6),
Print media (1) without stopping the print media (1).
The upper print field reaches the position just below the print head.
Transport the print media (1) until the presser roller (7)
The feature is that the print medium (1) is pushed down to hold it down.
Method for transporting print medium.