JPS59136276A - Detector for print reference mark - Google Patents

Abstract

PURPOSE:To raise the reliability of mark detection as well as shorten the time of detecting the position of print reference mark by a method in which on the basis of the sending amount of printing medium, the positions of print reference mark are obtained. CONSTITUTION:A print reference mark detector is provided with a circuit 12 to count the sending amount of printing medium, a circuit 11 to generate a detection section pulse corresponding to a print reference mark detection section on the printing medium, set up on the basis of the generation time of a medium detection signal, a start mark memory circuit 20 to store the sending amount of printing medium, corresponding to the initial marking position in the print reference mark detection section, an end mark memory circuit 21 to store the sending amount of printing medium, corresponding to the final marking position, and a circuit 22 to read out selectively the sending amount of printing medium from the memory circuit 20 or 21, correspondingly to the running direction of the printing medium. On the basis of the selected sending amount of the printing medium, the position of print reference mark is obtained.

Description

Detailed Description of the Invention (a) Technical Field This invention relates to a device for detecting the printing condition of a printing medium such as a bankbook, and in particular to a printing reference mark that serves as a reference for determining the next line to be printed on the printing medium. The present invention relates to a printed reference mark detection device that detects a printed reference mark.

(bl Prior Art and Its DisadvantagesPassbooks used in ATM devices, etc. usually have page codes, transaction codes, etc. printed in predetermined positions.This is the reference position for setting the next line to be printed. In many cases, the printed reference mark is also used as a printed mark such as the page code or transaction code, but since these codes are generally composed of many marks, it is difficult to always select them correctly during the passbook transport stage. Therefore, the conventional printing reference mark detection device reads a mark located at a certain distance from the time when the leading edge of the passbook is detected as the printing reference mark.

However, with the above devices, it is necessary to transport the print medium in a predetermined direction in order to read the print reference mark, so when checking the print content after turning the page or after printing, it is necessary to It was necessary to adjust the running direction to a certain direction. For this reason, the total conveyance distance of the printing medium becomes long, which limits the ability to shorten the processing time, and also makes it impossible to sufficiently improve reliability.

(C) Object of the Invention The object of the present invention is to provide a printing standard that accurately detects a printing reference mark by one run in one direction, regardless of the position of the printing reference mark on the printing medium and the running direction of the printing medium. An object of the present invention is to provide a mark detection device.

(d) Structure and Effects of the Invention To summarize, the present invention sets a printing reference mark detection section on a printing medium based on the time when the passage of the medium is detected by a passage detection sensor, and sets a detection section pulse corresponding to the section. a start mark storage circuit that stores a print medium feed amount corresponding to the first mark position and a print medium feed amount corresponding to the last mark position of the printing reference mark detection period; An end mark storage circuit is provided, and the print medium feed amount stored in the start mark storage circuit or the print medium feed amount stored in the end mark storage circuit is selected corresponding to the running direction of the print medium, and the selected feed amount is The position of the printing reference mark is determined based on the following. In other words, one of the starting and ending marks within the printing reference mark detection area is used as the printing reference mark, and the printing medium feed amount corresponding to the above two mark positions is set when the printing medium travels to the right or left, respectively. are stored respectively, and when the print medium travels in the right direction, the print medium feed amount is selected to be stored in one memory circuit, and when the print medium travels in the left direction, the print medium feed amount is selected to be stored in the other memory circuit. The print medium feed amount is selected so that the print medium feed amount corresponding to the mark position serving as the printing reference mark is selected regardless of which direction the print medium is traveling.

According to this invention, since the printing reference mark detection section can be arbitrarily set by changing the length of the detection section pulse corresponding to the section, it is possible to set the printing reference mark detection section as desired by changing the length of the detection section pulse corresponding to the section. The position of the print reference mark can be determined by running the print medium only once in one direction, regardless of the print reference mark.

Therefore, the total I! required for the position detection operation of the printing reference mark! The waiting time is reduced, the processing time can be significantly shortened, and the reliability of printed reference mark detection can be improved.

(e) Embodiment FIG. 1 is a schematic mechanical diagram of a printing medium conveying device which is an embodiment of the present invention. Further, FIG. 2 is a diagram showing the positional relationship between the print medium and the sensor when the running direction is the A direction (rightward direction).

In FIG. 1, conveyance rollers la and lb placed oppositely on the input side of the print medium and conveyance rollers 1c and 1d placed oppositely on the output side are driven by a pulse motor 3 via drive belts 2a and 2b. be done. The print medium 4 is conveyed in the B direction (to the left) by these conveyance rollers in order to confirm the print content after printing. A passage detection sensor 6 composed of a light emitter 6a and a light receiver 6b is arranged between the transport rollers la and lcO, and this sensor detects passage of the print medium to the right or to the left. In addition, the passage detection sensor 6 and the conveyance roller 1
A light source 7 and a reflective sensor 8 that receives reflected light from the light source 7 are arranged between the light source 7 and the reflective sensor 8, and the reflective sensor 8 detects a print mark or a print mark on the print medium 4.

As shown in FIG. 2, a reflective sensor 8 is located in the moving direction of print marks 40a, 40b, and 40c printed on the print medium 4, and a passage detection sensor is located in the direction of the center line 0 of the print medium 4. 6 is located. The printing marks 40a, 40b, and 40c constitute page marks, and in this embodiment, the mark 40a among these three marks is used as a printing reference mark. When the printing medium 4 runs in the input direction with the above configuration, the passing detection sensor 6 first detects the leading edge of the printing medium 4, and then the reflective sensor 8 sequentially detects the marks 40'a, 4(lb, 40c). The area 40 shown here represents a print reference mark detection section set by a print reference mark detection device to be described later.

FIG. 3 is a diagram showing the positional relationship between the print medium and the sensor when the print medium 4 travels in the direction of arrow B (to the left).

In this case, when the print medium 4 runs, the passage detection sensor 6 first detects the rear end of the print medium 4, and then the reflective sensor 8 detects the printed content and marks 4. Oc,
40b and 40a are sequentially detected.

Next, a printing reference mark detection device including the passage detection sensor 6 and the reflective sensor 8 will be explained.

FIG. 4 is a block diagram of this printing reference mark detection device. Further, FIGS. 5 and 6 are timing charts for explaining the operation of the device.

In FIG. 4, the signal detected by the passage detection sensor 6 is amplified to an appropriate level by an amplifier 10, and is led to a detection section setting circuit 11 and a feed amount counting circuit 12 as a medium detection signal a. The oscillation output of the oscillator 13 that forms the reference signal is
It is led to a pulse motor control circuit 14 that operates when it receives a pulse motor operation signal p whose polarity is reversed depending on the running direction from a CPU (not shown). When the pulse motor operation signal p is output from the CPU, the pulse motor control circuit 1
4 is a detection interval setting circuit 11 based on the oscillation output. Pulse motor phase generation circuit 15 and feed position needle several times'g! A pulse motor shift pulse b is supplied to f12. Phase generation circuit 1
The output of 5 is amplified by a pulse motor driver 16 to drive the pulse motor 3. As a result, the conveyance rollers 1a to 1d are driven, and the print medium 4 is moved over the conveyance roller 5.
will be running.

When the detection section setting circuit 11 detects the medium detection signal a, it counts the pulse motor shift pulse b a predetermined number of times (assumed to be no), and the pulse width from the time when the count ends until the first mark signal is detected. A start mark detection period pulse C1 having a start mark detection period pulse C1 and a detection period pulse d rising simultaneously with the pulse C and having a pulse width corresponding to the length of the printing reference mark detection period 40 (see FIG. 2) are formed. Assuming that the print medium 4 is running in the direction A as shown in Figure 2, the number of shift pulse counts from when the medium detection signal a is obtained until the start mark detection section pulse C is generated is the second Diagram print medium 4
The width of the detection section pulse d is set to a number corresponding to the length of the printing reference mark detection area 40 in FIG. 2. is set to On the other hand, when the printing medium 4 is traveling in the direction B as shown in FIG.
Obtain medium detection signal a and start mark detection section pulse C
The number of shift pulses counted until the shift pulse is generated is set to a number corresponding to the distance from the rear end of the print medium 4 to the rear end portion S' of the print state detection section 40 in FIG. In this case as well, the width of the detection section pulse d is set to a number corresponding to the length of the print reference mark detection section 40 in the same manner as described above.

The detection output of the reflective sensor 9-8 is amplified to an appropriate level by an amplifier 17, and the amplified signal is ANDed with the start mark detection period pulse C1 and the detection period pulse d by AND gates 18 and 19. The detection section start mark signal e and the detection section mark signal f are respectively stored in the start mark storage circuit 20. It is guided to the end mark storage circuit 21. As a result, when the print medium 4 is traveling in the direction A, the detection section start mark signal e is at the mark 40.
The detection section start mark signal e becomes a signal corresponding to the position of the mark 40c when the print medium 4 is traveling in the direction B. Further, the detection section mark signal f becomes a time-series pulse signal that detects the marks 40a, 40b, and 40c in order when the printing medium 4 is running in the A direction, and when the printing medium 4 is running in the B direction. Now, Mark 40c.

The feed amount counting circuit 12, which is a time series pulse detected in the order of 40b and 40a, counts shift pulses b when receiving the medium detection f word a, and counts the shift pulses corresponding to the feed amount of the printing medium. (In other words, the f number output signal g is output to the start mark storage circuit 20 and the end mark storage circuit 21.) When the start mark storage circuit 20 receives the detection section start mark signal e, Capture and store the δ ten-odd output signal g of
On the other hand, when the end mark storage circuit 21 receives the detection section mark signal f, it takes in and records the count output signal g at that time. In this case, the detection section mark signal f is 3 in total (because it occurs constantly, the end mark storage circuit 21 updates the stored data with a new count output signal G every time a pulse is input. Therefore, the start mark storage circuit 204 The first mark of the printing reference mark detection section 40 (vertical G) The corresponding printing medium feed amount is stored, and the end mark storage circuit 21 finally stores the printing reference mark and the last mark of the moxibustion detection section 40. The print medium feed amount corresponding to the position is stored. Specifically, when the print medium 4 travels in the direction A, the print medium feed amount corresponding to the position of the mark 40a is stored in the start mark storage circuit 2.
0, and the print medium feed amount corresponding to the position of the mark 40C is stored in the end mark storage circuit 21.

On the other hand, when the printing medium 4 travels in the direction B, the mark 4
The start mark storage circuit in which the print medium feed amount corresponding to the position of 0C is stored in the start mark storage circuit 20, and the print medium feed amount corresponding to the position of the mark 40a is stored in the end mark storage circuit 21. The data stored in the end mark storage circuit 20 and the end mark storage circuit 21 are led to the print medium feed signal selection circuit 22. This circuit 22 selects both print medium feed signals to be output to a CPU (not shown) using a selection signal j obtained by exclusive ORing the output of the print medium selection switch 23 and the pulse motor operation signal p in an EXOR circuit 24. Pulse motor operation signal p
is a signal that is reversed depending on the running direction of the print medium 4, so the print medium feed both signal selection circuit 22 selects the print medium feed both signal or end signal up to the start mark position corresponding to the running direction of the print medium 4. Select both print medium feed signals i to the mark position. The print medium selection switch 23 is composed of a dip switch or the like, and sets the type of print medium to be used. If the printing medium is of the type shown in FIGS. 2 and 3 in which the printing reference mark is set near the leading edge of the printing medium, the pulse motor operation signal p is high when the printing medium 4 is conveyed in the A direction. If so, the contact 23b, which is clamped at the low level, is set to the on state. In this way, when the pulse motor operation signal p is high, that is, when the print medium 4 is traveling in the direction A, the selection signal j becomes 1a, and the selection circuit 22 selects the print medium corresponding to the start mark position. Select both feed signals. On the other hand, if the pulse motor operation signal p becomes low, that is, if the printing medium 4 travels in the direction B, the selection signal j becomes low, and the selection circuit 22 selects both signals j for feeding the printing medium to the end mark position. I come to do it.

Next, the operation of the printing reference mark detection device will be explained.

The print medium 4 travels in the direction A, and when the leading edge of the print medium 4 is detected by the passage detection sensor 6, the medium detection signal a rises. At the same time, the feed amount counting circuit 12 counts the pulse motor shift pulse b to count the feed amount of the printing medium 4, and furthermore, the detection area setting circuit 11 starts the printing reference mark detection area from the leading edge of the printing medium 4 as shown in FIG. When the count value corresponding to the distance to the tip S of 40 is reached, a start mark detection section pulse C is generated, and a detection section pulse d having the same rising edge as that pulse is generated. As the print medium 4 further travels, the marks 40a, 40b, and 40c are sequentially detected by the reflective sensor 8. This mark signal is ANDed with the start mark detection interval pulse C generated by the detection interval setting circuit 11, and is led to the start mark storage circuit 20 as the detection interval start mark signal e, which puts the storage circuit into a write enable state. . Therefore, the start mark storage circuit 20 stores the count output signal g at that time.

Further, the mark signal is logically ANDed with the detection section pulse d and is led to the end mark storage circuit 21 as a detection section mark signal f. Since the a circuit 21 described above enters the write enable state every time the detection section mark signal f is input, the count output signal g is updated and stored each time. From the above operations, the printing medium 4 is moved in the direction A shown in FIG.
As it travels, the start mark storage circuit 20 stores the print medium feed I(nl) to the position of the mark 40a, and the end mark storage circuit 21 stores the print medium feed I(nl) to the position of the mark 40c. The medium feed amount (n3) is stored.

On the other hand, when the print medium 4 is running in the direction A, the pulse motor operation signal p is in a high state, so the selection signal j is also high, and the print medium feed amount signal selection circuit 22 moves the print medium up to the start mark position. CP feed amount signal
Output to U.

Next, as shown in FIG. 3, when the running direction of the print medium 4 is reversed and starts running in the B direction, the feed amount counting circuit 12 and the detection section setting circuit 11 start counting operations in the same manner as described above. , at this time, the detection section setting circuit 11 detects the rear end of the printing medium 4 and counts (nlo) up to the rear end of the printing reference mark detection section 40, and then outputs the start mark detection section pulse C and the detection section pulse d. (See Figures 3 and 6). Then, the start mark storage circuit 20 stores the printing medium feed amount (nil) to the position of the mark 4Qc detected immediately after the rise of the pulse C according to the start mark detection interval pulse C, and similarly the end mark storage circuit 21 corresponds to the detection interval pulse d, and updates and stores the print medium feed amount to the position of the mark signal detected during that period.

Therefore, the mark 4 is stored in the start mark storage circuit 20.
The print medium feed amount (nil) up to 0c is stored, and the print medium feed 31' (n13) up to the mark 40a is stored in the end mark storage circuit 21. On the other hand, print medium 4
When traveling in direction B, the motor pulse operation signal p is in a low state, so the selection signal j also becomes low, and the print medium feed amount signal selection circuit 22 in turn selects the print medium feed amount signal i to the end mark position. is output to the CPU.

From the above operations, the amount of print medium feed to the position of the mark 40a can be determined both when the print medium 4 is traveling in the A direction and when the print medium 4 is traveling in the B direction. That is,
This mark 40a can be used as a print reference mark that can be detected regardless of the running direction of the print medium.

In the above embodiment, as shown in FIGS. 2 and 3,
The printing medium 4 to be used is of the type in which the printing reference mark is set near the leading edge, but as shown in FIG. You may also use (, -).

In this case, close the contact 23a connected to the high level of the print medium selection switch 23 and use the motor pulse operation signal p.
The selection signal j is set to be low when is high, that is, when the print medium 4' is conveyed in the A direction. In this way, as can be seen from the timing chart in FIG. 8, when the print medium 4' is running in the input direction, the start mark storage circuit 20 stores the print medium feed amount (n21) to the position of the mark 400'. The end mark storage circuit 21 also stores the print medium feed amount (n23) to the position of the (print reference) mark 40a'. and,
Since the selection signal j at this time is low, (printing standard)
The print medium feed amount to the position of mark 40a' is output to the cPU. On the other hand, when the printing medium 4' is running in direction B, which is opposite to the input direction, the start mark storage circuit 20 stores the printing medium feeding amount to the position of the printing reference mark 40a', and The mark storage circuit 21 stores the print medium feed amount to the mark 40c'' position, and since the selection signal j is high, the print medium feed amount to the mark 40a' position (printing reference) is stored in the mark storage circuit 21. A signal will be output to the CPU.

By changing the setting state of the printing medium selection switch 23 in accordance with the setting position of the printing reference mark as described above, it is possible to accurately determine the amount of medium feed to the required position of the printing reference mark.

[Brief explanation of drawings]

FIG. 1 is a schematic mechanical diagram of a print medium conveying device according to an embodiment of the present invention. Further, FIG. 2 is a diagram showing the positional relationship between the print medium and the sensor when the running direction is toward (rightward). 3 is a diagram showing the positional relationship between the print medium and the sensor when the print medium 4 travels in the direction of arrow B (to the left). FIG. 4 is a block diagram of the print reference mark detection device. 5 and 6 are timing charts for explaining the operation of the device. FIG. 7 shows the position of the print medium and the sensor when another type of print medium runs in the direction of arrow A. FIG. 8 is a flowchart showing the operation when the same printing medium is used. 4-printing medium, 6-passage detection sensor, 8-reflective sensor (mark detection sensor), 11-detection section setting circuit, 12-feed amount counting circuit, 20-start mark storage circuit, 21-end mark storage circuit,
22-Print medium feed amount signal selection circuit. Applicant Tateishi Electric Co., Ltd. Agent Patent Attorney Hisao Komori is1 Figure ゛Figure 5 In1 Figure 6b --------------------111111
' 1111 Luha 13 Figure 7 Figure 8 [n23

Claims (1)

[Claims] (1) Passage detection sensor that outputs a medium detection signal when it detects the passage of a print medium running in the right or left direction, and mark detection when it scans the surface of the print medium and detects printing or print marks. and a mark detection sensor that outputs a signal, the printing reference mark detection device is configured to determine the position of the printing reference mark based on the medium detection signal and the mark detection signal, and the printing reference mark detection device calculates the feed amount of the printing medium. a detection section setting circuit that sets a printing reference mark detection section on the print medium based on the time when the medium detection signal is generated, and generates a detection section pulse corresponding to the section; a start mark storage circuit that stores a print medium feed amount corresponding to the first mark position in the reference mark detection section; an end mark storage circuit that stores a print medium feed amount that corresponds to the last mark position; and a running direction of the print medium. a print medium feed amount selection circuit that selectively reads a print medium feed amount from the start mark storage circuit or the end mark storage circuit in response to the print medium feed amount selected by the print medium feed amount selection circuit; A printing reference mark detection device that determines the position of a printing reference mark based on.