JPH03224771A - Printer of commodity saling data processing apparatus - Google Patents

Abstract

PURPOSE:To reduce the number of the parts of an apparatus by arranging resetting members to both ends of the moving range of a printing head so that the detection results due to a light detection element based on a reflecting surface and a non- reflecting surface become mutually different and detecting that the printing head reaches a reset position on the basis of the detection results. CONSTITUTION:A receipt resetting detection plate 6d is constituted so that the non- reflecting surface thereof having width (a) with respect to the moving direction of a head is formed at the position of a distance (b) from one end on the side of receipt paper 6b of the reflecting surface thereof and a journal resetting detection plate 6e is constituted so that the non-reflecting surface thereof is formed at the position of a distance (c) from one end on the side of journal paper 6c of the reflecting surface thereof. Since the non-reflecting surfaces are formed at mutually different positions as mentioned above, the detection results in the resetting detection plate 6a and the resetting detection plate 6e due to a photosensor, that is, the detection results at both ends of the moving range of the printing head are respectively different. A resetting detection program detects that the printing head reaches a reset position on the basis of the difference between the detection results. Therefore, the sensor necessary for an apparatus is only one photosensor.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a printer of a merchandise sales data processing apparatus, which is equipped with a sensor for detecting when a print head has reached a reset position.

2. Description of the Related Art Some conventional product sales data processing devices are equipped with a printer for printing receipts, journals, and the like.

Such printers generally use printer paper such as roll paper to issue receipts and journals. A carrier is disposed that reciprocates linearly in a direction substantially perpendicular to the conveying direction of these printer sheets, and a print head is attached to this carrier. Further, one position sensor for detecting the position of the print head is disposed at each end of the movement range of the print head.

When such a printer issues receipts and journals, the print head moves linearly on the printer paper along with the carrier in the width direction to print, and a position sensor moves the print head to the reset position. detected.

Problems to be Solved by the Invention In the case of a printer for such a product sales data processing device,
Since the position sensor located at the end of the print head's movement range detects that the print head has reached the reset position, a total of two position sensors must be installed.
Therefore, the number of parts of the device increases, and at the same time, the wiring between the position sensor and its control circuit becomes complicated.

Means for Solving the Problems A carrier is provided with a print head and moves linearly back and forth in a direction substantially perpendicular to the conveying direction of printer paper, and a carrier is provided on either one of the carrier or the print head to emit detection light. It consists of one photodetection element that detects the detection light that is emitted and enters, a reflective surface that reflects the detection light from this photodetection element, and a non-reflective surface that does not reflect the detection light from the photodetection element. two reset detection members disposed one at each end of a movement range of the print head by the carrier so that detection results by the photodetection element based on the reflective surface and the non-reflection surface are different from each other; The apparatus further comprises reset detection means for detecting that the print head has reached the reset position based on the detection result by the photodetection element.

Since the detection results of the two reset detection members by the active light detection element, that is, the detection results at both ends of the print head movement range by the light detection element are different, one photodetection element can detect that the print head has reached the reset position. Therefore, the number of parts of the device can be reduced, and at the same time, the wiring between the photodetecting element and its control circuit can be simplified.

Embodiment An embodiment of the present invention will be described with reference to FIGS. 1 to 3. In this product sales data processing device, as shown in FIG. 2, a microcomputer is formed by connecting a CPU 1 with a ROM 2 and a RAM 3, and the
1 is connected to a display 4 via a display controller 4a, and a keyboard 5 is connected to the keyboard 5 via a keyboard controller 5a.
is connected, and a printer 6 is connected via a printer controller 6a.

However, in addition to a reset detection program as a reset detection means, the ROM 2 stores various programs for controlling the CPU 1 and exchanging data and commands between devices connected to this CPU. .

2, as shown in FIG. 1, the printer 6 is configured to use a receipt paper 6b and a journal paper 6C as printer paper so that their printed surfaces are located on the same plane and have the same conveyance direction. is set to . A carrier (not shown) is provided that moves linearly back and forth in a direction substantially perpendicular to the direction of conveyance of the receipt paper 6b and the journal paper 6C, and a print head (not shown) is mounted on this carrier. installed. However, the print head is moved within a movement range A by the carrier.

Furthermore, this print head is equipped with a reflective photosensor (
(not shown) is attached as a photodetector element. On the other hand, the receipt paper 6b in the movement range A of the print head
A receipt reset detection plate 6d as a reset detection member is provided at one end of the journal paper 6C side of the print head movement range A, and another journal reset detection plate 6d is provided as a reset detection member at one end of the print head movement range A on the journal paper 6C side. A detection plate 6e is provided.

However, in both the receipt reset detection plate 6d and the journal reset detection plate 6e, a non-reflective surface that does not reflect light from the photosensor is formed on a part of the reflective surface that reflects the light from the photosensor. It is something that

That is, in the receipt reset detection plate 6d, the non-reflective surface having a width a with respect to the moving direction of the head is formed at a distance from one end of the reflective surface on the receipt paper 6b side, and The detection plate 6e has a non-reflective surface exactly the same as described above formed at a distance C from one end of the reflective surface on the journal paper 6c side.

Furthermore, in the moving direction of the print head, there are areas between the receipt reset detection plate 6d and the receipt paper 6b, between the receipt paper 6b and the journal paper 6C, and between the journal paper 6c and the journal reset detection plate. 6e is entirely formed by a non-reflection surface. Note that the shaded area in this figure indicates the above-mentioned non-reflection surface.

In such a configuration, when issuing receipts, journals, etc., the carrier is driven by a motor or the like, and the print head moves linearly back and forth within the movement range A. At the same time, dot pulses formed based on print data control the print position of print characters and control the operation of various magnets, and as a result, printing is performed.

As shown in Table 1, this dot pulse is 3 to 5 pulses (on average 4 pulses) while the print head moves a distance a.
6 to 10 pulses (average 8 pulses) are formed while the print head moves the distance C, and 3 to 5 pulses are formed while the print head moves the distance C.
Pulses (average 4 pulses) are formed.

Table 1 On the other hand, a reset detection program is executed every time a dot pulse is formed. As shown in FIG. 3, in the reset detection process by this reset detection program, when a dot pulse is formed (printing has started) and the detection signal from the photosensor is on, the reset off counter is set to 0. Set. Further, when both the receipt reset flag and the journal reset flag are off, 1 is added to the contents of the reset on counter, and if the contents of this reset on counter is 2 or less, a dot pulse standby state is entered.

This reset detection process is performed every time a dot pulse is formed, and when the content of the reset on counter is greater than or equal to 3 and less than or equal to 5, the journal reset on flag is turned on and a dot pulse standby state is entered.

Further, when the content of the reset on counter becomes 6 or more and 10 or less, the journal reset on flag is turned off and then the receipt reset on flag is turned on to enter a dot pulse standby state.

Furthermore, when the content of the reset-on counter becomes 11 or more, the receipt reset-on flag is turned off and a dot pulse standby state is entered.

In this way, based on the contents of the reset-on counter, only one of the receipt reset-on flag and the journal reset-on flag is turned on, or both are turned off.

On the other hand, when the detection signal from the photosensor is off, the reset on counter is set to O, and then 1 is added to the contents of the reset off counter. If the content of this reset off counter is 2 or less, the dot pulse standby state is entered.

Then, this reset detection process is performed every time a dot pulse is formed, and when the content of the reset off counter becomes 3 or more and 5 or less, if the receipt reset on flag is on, the receipt reset flag is turned on,
If the journal reset on flag is on, the dot pulse standby state is entered after the journal reset flag is turned on.

Further, when the content of the reset off counter becomes 6 or more, the receipt reset flag and journal reset flag are turned off and then the dot pulse standby state is entered.

Therefore, immediately after the content of the reset-on counter becomes 3 or more and 5 or less, the content of the reset-off counter becomes 3 or more and 5 or less, and furthermore, when the detection signal by the photosensor turns on immediately after this, all the counters mentioned above ,as well as,
All flags are reset and the print head is set to journal paper 6.
After detecting that the reset position on the C side has been reached, the dot pulse standby state is entered.

In addition, immediately after the content of the reset-on counter becomes 6 or more and 10 or less, the content of the reset-off counter becomes 3 or more and 5 or less, and furthermore, if the detection signal by the photosensor turns on immediately after this, the above-mentioned All counters and flags are reset, and the print head is set to receipt paper 6.
After detecting that the reset position on the b side has been reached, the dot pulse standby state is entered.

In this way, the reset detection plate 6d and the reset detection plate 6e
Since the formation positions of the non-reflective surfaces are different between the two, the reset detection plate 6d and the reset detection plate 6e using photosensors are different from each other.
The detection results at both ends, that is, the detection results at both ends of the print head movement range are different. Then, the reset detection program detects that the print head has reached the reset position based on the difference in the detection results.

To detect when the print head has reached the reset position in this manner, the only sensor required in the apparatus is a photosensor. Therefore, the number of parts of the device can be reduced, and at the same time, wiring between the photosensor and its control circuit can be simplified.

Effects of the Invention As described above, the present invention includes a carrier on which a print head is disposed and moves linearly back and forth in a direction substantially perpendicular to the conveying direction of printer paper, and a carrier disposed on either one of the carrier and the print head. One photodetection element that emits detection light and detects the incident detection light, a reflective surface that reflects the detection light from this photodetection element, and a non-reflective surface that does not reflect the detection light from the photodetection element. two resets arranged at each end of a movement range of the print head by the carrier so that the detection results by the photodetecting element based on the reflective surface and the non-reflective surface are mutually correlated; Since the configuration includes a detection member and a reset detection means for detecting that the print head has reached the reset position based on the detection result by the photodetection element, the detection results of the two reset detection members by the photodetection element, that is,
The detection results at both ends of the print head movement range by the photodetection elements are different, so that only one photodetection element can detect that the printhead has reached the reset position, and therefore the parts of the device The number of points can be reduced, and at the same time, the wiring between the photodetecting element and its control circuit can be simplified.

[Brief explanation of drawings]

FIG. 1 is a plan view showing the structure of a printer according to an embodiment of the present invention, FIG. 2 is a block diagram showing an overview of the hardware configuration, and FIG. 3 is a flowchart of a reset check program. 6b. 6c...Printer paper, 6d. 6e...Recessit detection member applicant Tokyo Electric Co., Ltd. "Figure" Z diagram

Claims (1)

[Claims] A carrier on which a print head is disposed and moves linearly back and forth in a direction substantially perpendicular to the conveying direction of the printer paper, and a carrier disposed on either the carrier or the print head to emit detection light and enter the detection light. The reflective surface and the non-reflective surface are composed of one photodetecting element that detects the light, a reflective surface that reflects the detection light from the photodetector, and a non-reflective surface that does not reflect the detection light from the photodetector. two reset detection members disposed one at each end of a movement range of the print head by the carrier so that the detection results by the photodetection element based on the surface are different from each other; 1. A printer for a product sales data processing device, characterized in that the printer comprises reset detection means for detecting that the print head has reached a reset position.