JPS5841197B2 - Injimojikakuninsouchi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a printed character confirmation device that determines the consistency between a printed character signal and a printed character in a printing device using a printing drum to ensure accurate printing operation. Regarding.

The printing drum used in the printing device has a large number of character marks arranged on its outer circumferential surface so as to divide the rotation angle, and the desired character mark can be selected by selecting the rotation angle of the printing drum. Then, a printing operation is performed using the selected character mark.

For example, if a printing drum is coupled to a pulse motor to rotate by selecting a rotation angle, and then manually operated or stored or transmitted using a printed character signal, the character mark corresponding to the printed character signal is set to a predetermined position. The amount of step rotation of the print drum required to rotate it to the printing position is calculated, and the pulse motor is driven in steps according to the amount of rotation.

In this case, for example, the character "" at the rotation angle ■ position on the printing drum
After printing “A”, print the character “A” corresponding to the position of the rotation angle ■.
When the printing character signals "B" are combined, the rotation angle ■ of the character rBJ to be newly printed is compared with the rotation angle ■ of the previous printing character, and the printing drum is rotated at the rotation angle In-I.
The pulse motor is driven with a step signal necessary to rotate by J, and the character mark rBJ is set at the printing position.

That is, each time a print character signal is combined, a step signal is generated to set the character mark corresponding to the print character signal on the print drum at the print position, and this step signal controls the rotation of the pulse motor to control the rotation of the print drum. It performs rotation angle position control.

Therefore, according to such a printing device, the rotation of the printing drum is controlled in response to the printing character signal, so that high-speed printing can be effectively executed, and the printing drum can be effectively used as an output device for, for example, a computer device. It is what it is.

However, in the case of such a printing device, the printing drum does not return to the zero position set for each printing, but the rotation of the drum is controlled by comparing the previously printed character with the new character to be printed. Therefore, if an accident occurs where the step signal and the rotation amount of the step motor that rotates the print drum do not match due to slipping, signal deletion, etc., the subsequent printed characters will be the same as the input print. This results in a state that does not match the character signal.

In other words, it becomes impossible to obtain print output corresponding to accurate print input.

In particular, if the printed information is a series of numbers or symbols, it is difficult to check for printing errors even by looking at the printed output, and the reliability of the output information is poor.

The present invention improves the above-mentioned drawbacks and makes it possible to detect an error as quickly as possible even if an error occurs between an input printed character signal and a printed character in a printing device using a printing drum. It is an object of the present invention to provide a printed character confirmation device that allows printing operations to proceed while constantly confirming the accuracy of print output.

An embodiment of the present invention will be described below with reference to the drawings.

Figure 1 shows the configuration of the printing device section, 11 is a printing drum, on its outer circumferential surface, a plurality of character marks are arranged so as to divide the rotation angle, and in the axial direction, there are also multiple rows of character marks. A predetermined character mark to be printed is selected based on the rotation angle position and the axial movement position.

This printing drum 11 is attached to a shaft 12, and a keyway 13 is used to allow the printing drum 11 and shaft 12 to rotate together, and the printing drum 11 is moved along the shaft 12. It's at your disposal.

A pulse motor 14 is connected to the shaft 12, and the rotation of the printing drum 11 is controlled by this pulse motor 14.

A rotating plate 16 with a through hole 15 formed therein is coaxially attached to the shaft 12, and a light source 17 and a light receiving element 18 are fixedly disposed facing each other, so that light from the light source 17 passes through the through hole 15 to the light receiving element. 18 so that it can be received by the printing drum 1.
1 specific rotation angle position detector 19 is configured.

In addition, a guide rail 20 is placed parallel to the shaft 12.
A holding mechanism 21 for setting the axial movement position of the print drum 11 is movably attached to the guide rail 20.

Both ends of a thread 23 wound around a pulley coaxially provided on a pulse motor 22 are connected to this holding mechanism 21 via rollers 24a to 24d, and the pulse motor 22 moves the print drum 11 in the axial direction. The position is now controlled by settings.

Furthermore, a hammer shaft 25 is provided parallel to the shaft 12.

A hammer 26 is attached to the hammer shaft 25 so as to rotate together with the hammer shaft 25 through a keyway, and as the hammer shaft 250 rotates, the hammer 26 strikes the outer peripheral surface of the printing drum 11.

That is, a lever 27 is attached to the hammer shaft 25, and a spring 28 biases the hammer 26 away from the print drum 11 surface.

The electromagnetic plunger 29 drives the lever 27 against the spring 28, causing the hammer 26 to strike the surface of the printing drum 11, and the electromagnetic plunger 29 is excited by the printing command.

The position of the hammer 26 in the direction along the shaft 25 is set by a holding mechanism 30, and the holding mechanism 30 is attached to a guide rail 31 parallel to the hammer shaft 25, and is wound around a pulley attached to a pulse motor 32. The threads 33 are connected via rollers 34a to 34d, and their movement along the hammer shaft 25 is controlled by the pulse motor 32.

In this case, the pulse motor 32 is driven and controlled by the print step command generated following the print command, and the hammer 26
The hammer 26 is driven in steps of one character at a time, and the hammer 26 is moved back to the printing start position in response to a return command.

That is, the printing drum 1 is moved by the pulse motors 14 and 22.
1, set the rotational angle position and the axial position, position the character mark to be printed facing the hammer 26, and strike the character mark surface with the hammer 26 to separate the character mark and the hammer 26.
A predetermined character stamp is output on the recording paper interposed between the two.

FIG. 2 shows a drive circuit for the printing device as described above, in which a print character signal corresponding to a character to be printed is taken out from the input device 35 and supplied to a control circuit 36.

This control circuit 36 determines the position of the character mark on the print drum 11 corresponding to the combined print character signal, and a rotational movement control circuit according to the rotational angular position and lateral position of the print drum 11 at that time. 37 and lateral movement control circuit 38
A command is issued to drive the pulse motors 14 and 22 to rotate.

Then, a character mark corresponding to a predetermined input character signal is positioned opposite to the mark 26.

Further, the input device 35 generates a print command signal along with the print character page signal accompanying the input operation, and this signal is supplied to the delay circuit 39.

This delay circuit 39 is composed of, for example, a delayed flip-flop whose reading is controlled by a signal from an AND circuit 40 to which the rotation and lateral movement control end signals from the rotational movement control circuit 37 and the lateral movement control circuit 38 are combined. An output signal is obtained from the delay circuit 39 when the rotation and lateral movement control of the print drum 11 is completed.

The output signal from the delay circuit 39 is used as a hammer drive signal to excite the electromagnetic plunger 29 and is also supplied to the hammer movement control circuit 43 via the delay circuit 41 and OR circuit 42 to drive the pulse motor 32. Then, the nohemmer 26 is driven in increments of one character.

That is, when there is a print input to the input device 35, the rotational movement control circuit 3γ is activated by the print character signal generated by the print input.
, a command is given to the lateral movement control circuit 38, and the pulse motors 14 and 12 cause the printed character mark on the printing drum 11 to face the mark 26.

In this state, an output signal is obtained from the AND circuit 40, a print command signal generated along with the print input is taken out from the delay circuit 39, the electromagnetic plunger 29 is energized, and the hammer 26 performs a printing operation.

After the printing operation is completed, an output signal is obtained from the delay circuit 41, and the pulse motor 32 is driven step by step to move the hammer 26 by one character.

In this case, the rotational movement control circuit 37 and the lateral movement control circuit 38 generate a rotational angle amount corresponding to one character of the printing drum 11 and a step signal corresponding to an area outside the printed character string, and drive the pulse motor 14°22. The amount of rotation and the amount of lateral movement of the print drum 11 are proportional to the number of step signals.

Further, from the input device 35, a step signal for stepping without printing, that is, a space, and a return signal for returning the printing position to the top position are obtained.The step signal is coupled to the OR circuit 42, and the printing operation is performed. without doing...
The mark 26 is driven in increments one character at a time.

Further, the return signal is detected by the hammer movement control circuit 43 and moves the pulse motor 32 to return the hammer 26.

Figure 3 shows the control circuit for checking printed characters.
The control circuit 36 and rotational movement control circuit 37 shown in FIG. 2 are shown included.

That is, in response to an input character signal, a rotation angle position signal on the print drum 11 where the character mark of the input character is present is taken out from the input device 11.

The q rotation angle position signal is, for example, numerical information corresponding to rotation angle ranking numbers divided for each character page, and this numerical information is supplied to the comparison detection circuit 44 and the storage circuit 45.

The memory circuit 45 writes and stores the numerical information of this newly input printed character, and outputs the numerical information corresponding to the previous printed character, and this output numerical information is supplied to the comparison detection circuit 44. , and compare it with the numerical information of the new printed character above.

That is, the comparison detection circuit 44 compares the rotational angular position of the printing drum 11 when a new printing input is made with the rotational angular position where a new printing character exists, and determines whether the character mark of the new printing character is facing the hammer 26. This is to calculate the rotational direction and amount of rotational movement of the print drum 11 required until the
This direction and amount of movement are written and stored in the direction storage circuit 46 and movement amount counting circuit 47.

The number of steps corresponding to the amount of movement is preset in the movement amount counting circuit 47, and when a number indicating the number of steps exists in the counting circuit 47, a number presence signal is generated, and this signal is passed through the OR circuit 48. and is coupled to the control circuit 49.

This control circuit 49 is coupled with the direction signal from the direction memory circuit 46, and while the number present signal is present, the pulse motor 14 is driven step by step in accordance with the direction signal, and the step drive The signal is the movement amount counting circuit 47
is combined as a down count command of "-1".

That is, the pulse motor 14 is driven in steps while counting down the counting circuit 47.
The rotation is driven until the value of 7 becomes zero and the number presence signal disappears.

Then, the print drum 11 continues until the print character interval corresponding to the print input on the print drum 11 is positioned opposite to the error 26.
1 to set the rotation angle and drive the rotation.

Here, the step drive signal coupled to the pulse motor 14 from the control circuit 49 is supplied as a counting step signal to a circulating counter 50 that can go up and down and has a count number corresponding to the character open number on the drum circumference. be done.

In addition, this counter 50 receives a direction signal from the direction memory circuit 46 to indicate J+J (up) or "-J (down)".
This is set, and the amount of rotation of the print drum 11 at that time is sequentially integrated and counted and stored in response to a rotation control command signal for the print drum 11.

The counted value of the counter 50 is monitored by a specific value detection circuit 51, and is monitored by a specific rotation angle detector 19 shown in FIG.
A detection signal is generated when the count value corresponds to the rotation angle of the print drum 11 at which the detection signal is to be obtained, and is supplied to the exclusive OR circuit 52.

The detection signal from the specific rotation angle detector 19 is also coupled to this OR circuit 52, and is configured to generate an error signal when this detection signal and the detection signal from the detection circuit 51 do not occur simultaneously. .

That is, the exclusive OR circuit 52 compares the count value of the step signal that is the print drum 110 rotation command and the specific angle detection signal obtained by actually rotating the print drum 11. When the rotation angle of the print drum 11 is accurately controlled in response to the print drum 110 control signal, no error signal is generated.

For example, when input characters and printed characters do not match due to slippage in the mechanical rotation control of the printing drum 11, dropout of signals, mixing of noise signals, etc., the detection signal from the specific angle detector 19 is detected. The occurrence of this error is not synchronized with the generation of the detection signal from the specific value detection circuit 51, and an error signal is generated, and it is sufficient to issue an alarm using this error signal.

Further, when a return command is generated from the input device 35, the return signal is coupled to the flip-flop circuit 54 via the OR circuit 53 as a set command.

In its set state, the flip-flop circuit 54 gives a preset command to the storage device 45 to set the specified value, and also gives a drive command to the OR circuit 48 to cause the pulse motor 14 to rotate continuously.

This pulse motor 14 continues until the flip-flop circuit 54 is reset by the specific rotation angle detection signal, and the printing drum 11 is stopped in the state set at the specific angle state.

The counted value of the counter 50 at that time is monitored by a specific value detection circuit 51, and an exclusive OR circuit 52 determines whether or not the rotation angle of the printing drum 11 is accurately controlled and an accurate printing operation is being performed. It is for discrimination.

That is, the rotational angular position of the print drum 11 is checked at least every time a return operation is performed in the printing device to monitor whether print output is being performed accurately.

Furthermore, when this printing device is activated, its activation signal (pw on ) is taken out via the one-shot circuit 56 and sent to the flip-flop circuit 5 through the OR circuit 53.
4 will be set.

Then, the same check operation as in the case of the return control described above is performed.

In this case, the output signal from the one-shot circuit 55 and the detection signal from the specific angle detector 19 are supplied to the AND circuit 56, and the counter 50 is preset to a value corresponding to the specific angle. The rotational angle position of the printing drum 110 is made to correspond to the rotation angle position, so that normal printing operation thereafter can be confirmed.

As described above, according to the present invention, the rotational angular position of the printing drum is accurately controlled by the printing input signal, and it is possible to check whether or not the printing operation is being performed accurately while the printing operation is in progress. , which has a very large effect on improving the reliability of print output.

In the above embodiment, the printing drum is applied to a printing device that controls rotational angle and axial movement, but of course the printing drum is provided over the entire axial direction, and printing is performed by controlling rotational angle without controlling axial movement. Applicable to the selected printing device,
Of course, various other applications are possible without departing from the gist of the invention.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a printing mechanism section of a printed character confirmation device according to an embodiment of the present invention, FIG. 2 is a configuration diagram showing a drive control circuit of the printing mechanism, and FIG. It is a block diagram explaining a control circuit. 11... Printing drum, 14, 22, 32...
...Pulse motor, 19...Specific angle detector,
26...no error, 29...electromagnetic plunger, 35...input device, 44...
・Comparison detection circuit, 45... Memory circuit, 46...
... Direction memory circuit, 4 circuit, 49 ... Control circuit, 51 ... Specific value detection circuit, circuit. 7...Rotational movement amount count 50...Counter, 52...Exclusive OR

Claims (1)

[Claims] 1 Multiple character markings are placed on the outer circumferential surface (with a flat printing drum,
A motor that rotates the print drum in forward and reverse directions, a storage means that stores the print data printed immediately before, and a memory device that compares the print data in this storage means with the print data to be printed next and drives the print drum. rotation detection means for detecting the number of rotation steps and rotation direction of the motor; drive control means for outputting a step drive signal for rotationally driving the motor in accordance with a detection output of the rotation detection means; and detection of the rotation detection means. a counting means that is designated to be added or subtracted according to the output and is stepped by the step drive signal; a count detection means that detects that the count in the counting means has reached a specific count; and the printing drum. a reference position detection means for outputting a reference signal when the reference position is detected by the reference position detection means, and a malfunction is detected depending on whether or not a specific count value is detected by the count value detection means when the reference position is detected by the reference position detection means. Malfunction detection means and printed character confirmation device.