JPH0822606B2 - Type-printing printer - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a type-printing printer suitable for issuing checks, bills and the like.

<< Summary of the Invention >> The present invention monitors the output of a photoelectric sensor through a slit formed in a disc, selects an embossed character on a print wheel based on a change in the sensor output, and detects a printing error. It is designed to be able to do.

<Prior art and its problems> In general, this type of stamping printer drives the print wheel appropriately based on the printing contents instructed by key operation, etc., and prints the amount of money etc. on ticket paper such as checks and bills. In particular, when the printing target is an important ticket such as a check or a bill, a high reliability is required for the printing operation.

FIG. 5 is an exploded perspective view for explaining the printing mechanism of the embossing type printer in the conventional example. In this example, the print wheel 1 is rotated by the drive of the type selection pulse motor 4 and the printing is performed by a hammer (not shown). It is configured to be printed by stamping an arbitrary type 2 on the wheel 1.

By the way, when selecting the type 2, the appropriate number of slits B are radially provided on the outer periphery of the disk 3 integrally provided with the print wheel 1 (see FIG. 6), and the slits B are used to stop. Position detection sensor S
By providing the sensor 2'and the character counter sensor S3 ', the print wheel 1 is rotated by a predetermined angle to select a desired type. The initial position is detected by the initial position detecting sensor S1 'through the slit A.

However, in the above configuration, the sensor S3 'detects the rotation angle of the pulse motor 4 by counting the slit B, but even if the sensor count is correct, the angular pitch deviation of the type 2 cannot be detected. There was a problem.

Further, when the angular pitch shift as described above occurs, it is necessary to either leave it as it is or perform the homing process each time by the sensor S1 ', and there is a problem that the processing efficiency of printing is poor.

<Object of the Invention> An object of the present invention is to automatically detect an accurate embossing position and to improve the processing efficiency in an embossing printer that employs a print wheel of this type.

<< Structure and Effect of the Invention >> In order to achieve the above-mentioned object, the present invention has a print wheel that is rotationally driven by a pulse motor and has print characters formed on its outer periphery at equal pitches, and can rotate integrally with the print wheel. And a disk in which slits having the same pitch as the type are radially formed, and a sensor arranged near the disk and positioned so as to detect the slit when any type is in the print position. When the edge of the sensor output from the OFF state to the ON state is counted, and the count value becomes a value corresponding to the type to be selected next, a type selecting unit that stops the pulse motor, and the type is In the pulse motor stopped state after being selected, the output of the sensor was monitored and this changed from the on state to the off state. Characterized by anda print foolproof means for issuing an error output based on the door.

According to such a configuration, a printing paper having no printing error can be issued from this type of character embossing type printer, and its work efficiency can be improved.

<< Description of Examples >> Next, examples of the present invention will be described. The same members as those in the above-mentioned conventional example are designated by the same reference numerals, and the description thereof will be omitted.

FIG. 1 is a perspective view showing the external appearance of a type embossing printer according to the present invention.

As shown in the figure, in front of the upper surface of the type-stamping type printer 11, a keyboard for giving a print command such as an amount of money is printed.
12, Display for displaying the commanded amount 13
When a print command is given from the keyboard 12, ticket papers such as checks and bills stored in an aligned state in the hopper 14 are transferred to the transport path 15 one by one by the action of a feeding roller (not shown). While being fed out and passing through the ticket printer 16, desired printing such as the amount of money is performed, and finally the stacker 17
Is released and stored.

Reference numeral 18 denotes a journal printer for recording the ticket issuing situation.

The above-described configuration is exactly the same as that of the conventional type embossing type printer, and therefore detailed description of each unit is omitted.

Next, FIG. 2 is an exploded perspective view showing an embossing mechanism in the type embossing type printer 11. The print wheel 1 and the disk 3 are integrally provided via a rotary shaft 20, both of which are rotationally driven by a pulse motor 4. Is configured.

Reference numeral 2 is a print character formed on the outer periphery of the print wheel 1 at an equal pitch, and in this embodiment, 16 characters (that is, 22.5 characters).
Intervals are arranged.

Numeral 21 is a slit formed at the same pitch as that of the character 2, and is radially provided on the outer circumference of the disk 3 with a rotation width of approximately one step of the pulse motor 4.

That is, FIG. 3 is a plan view of the disc 3, but the slits 21 are provided on the outer periphery of the disc 3 at the same pitch as the type 2, that is, at an interval of 22.5 °.
Each slit is formed with a gap of 7.5 °, which is approximately one step rotation width of the pulse motor 4.

The disk 3 is also provided with a circular slit 22 for detecting the home position of the print wheel 1.

S1 and S2 are photoelectric sensors provided with the light emitting / receiving elements facing each other with the disk 3 sandwiched therebetween. The home position detecting sensor S1 detects the home position of the print wheel 1 through the circular slit 22. are doing.

The print position sensor S2 is used for the print wheel 1.
When any one of the characters 2 comes to the print position by coming to the opposite position of a not-shown hammer, it is positioned and provided so as to be in the "bright" output state through the slit 21.

That is, in the present embodiment, the sensor S2 is configured to be in the "bright" output state when it is at the center position of the slit 21 (the position indicated by the alternate long and short dash line in FIG. 3).

On the other hand, the sensor S2 is configured to be in the "dark" output state when it is not at the center position of the slit 21.

Therefore, the character counter can be performed by counting the edge from the “dark” state to the “bright” state via the sensor S2, and when the count value becomes a value corresponding to the type to be selected next. The pulse motor is stopped and the desired type is selected.

In the stopped state, the sensor S2 is normally in the center position of the slit 21 and is in the “bright” state, but the sensor S2 constantly monitors the output state of “bright” or “dark”, and thus “dark”.
When the status is changed, an error output is issued to prevent a printing error.

The type embossing printer according to the present invention is constructed as described above, and its operation will be described below with reference to the flow chart of FIG.

When the program is started, document feeding is started first, and at the same time, the type selection pulse motor 4 is rotated to perform homing processing (steps 100 to 1).
06).

When the homing process is completed in this manner, the desired print character number setting, print pitch calculation, and sensor count number setting are sequentially performed (steps 108 to 112), and then the character selection motor 4 is started (step 11).
Four).

After that, the sensor counter is decremented by 1 each time the rising edge of the slit 21 is detected via the sensor S2, and the value is 0.
And the type selection motor 4 stops (steps 114 to 124).

In this state, if it is confirmed that the paper sheet has been conveyed (YES in step 126), then the stamping operation is started.

At the start of this embossing operation, the output of the sensor S2 is checked (step 128) prior to the hammer processing, and this is "bright".
State or "dark" state (step 13
0).

Here, the "dark" state means that the print wheel 1 is rotated for some reason and the type is misaligned. Therefore, in this case (step 130
NO), immediately issue an error code (step 14)
Four).

On the other hand, if the output of the sensor S2 is in the "bright" state, the print wheel 1 is considered to be normal, and the hammer process is performed.
One character is printed (step 132).

When printing is completed, the state of the sensor S2 is checked again to confirm that the print wheel 1 has been misaligned due to the impact of the hammer process (step 13).
4) If it is in the "dark" state, also set an error code (step 144).

On the other hand, if it is in the "bright" state (YES in step 136), 1 is subtracted from the number of printed characters, and the above operation is repeated until the number of printed characters becomes 0 (step 140).

As described above, in the printer according to the present embodiment, the engraving operation is performed after confirming that the sensor S2 is at the center position of the slit, and not only during print wheel type selection but also after selection. Since the output of the sensor S2 is checked, it is possible to prevent a printing error due to the character shift after the character selection.

Further, since the sensor S2 is also used for counting the number of printed characters and detecting the stop timing, it is possible to reduce the number of sensors by 1.

[Brief description of drawings]

FIG. 1 is a perspective view showing the external appearance of a type embossing printer according to the present invention, FIG. 2 is an exploded perspective view showing a printing mechanism inside the printer, FIG. 3 is a plan view of a disk, and FIG. 4 is a control program. FIG. 5 is an exploded perspective view showing a printing mechanism in a conventional example, and FIG. 6 is a plan view of the disc. 1 …… Print wheel 2 …… Type 3 …… Disk 4 …… Pulse motor 11 …… Type embossing printer 21 …… Slit S1 …… Sensor for home position detection S2 …… Sensor for type position detection

Claims (1)

[Claims] 1. A print wheel rotatably driven by a pulse motor and having print characters formed on its outer periphery at an equal pitch, and a slit that is rotatable integrally with the print wheel and has a pitch equal to the print character. A formed disk, a sensor arranged near the disk and positioned so as to detect the slit when one of the characters is in a print position, and an edge from an off state to an on state of the sensor output. And when the count value reaches a value corresponding to the type to be selected next, type selection means for stopping the pulse motor, and in the pulse motor stopped state after the type is selected, the sensor Missed prints that monitor the output and issue an error output based on the change from the on state to the off state A print-embossing type printer comprising: a prevention unit.