JPH0453776A - Printer equipped with sheet feeding mechanism - Google Patents

Abstract

PURPOSE:To enable line feed processing to be performed easily after executing of sheet feed by allowing a printing medium to be fed by line with a carriage set to a left margin position when an initial line feed command is entered. CONSTITUTION:When an initial return key is operated after execution of automatic sheet feed, a printing sheet is fed by a single line, if a carriage is set to a left margin position or to a left end position, and then flags F1, F2 are reset. Therefore, if a routine character printing action is to be initiated by moving the carriage 6 to a left margin position or a left end position after execution of automatic sheet feed, the first return key operation after printing action enables an original line feed processing to be executed. Subsequently, the number of times of return key operation after sheet feed execution can be reduced and thus the line feed processing can be facilitated.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a printing device equipped with a paper feeding mechanism, and in particular, to a printing device equipped with a paper feeding mechanism, and in particular to a printing device that performs line feed processing in response to the first line feed command after automatic paper feeding is executed in response to a paper feed command. Regarding what I tried to improve.

[Prior art]

Generally, an electronic typewriter, for example, is equipped with a display that displays display information, and also has a printing mechanism that automatically prints multiple sheets of printing paper (cut sheets) set in a stacker one by one when printing document data. Some printers are equipped with a paper feeding mechanism that supplies the paper to the platen. Here, -
When fishing by boat, the carriage is equipped with a paper meter that guides the supplied paper along the platen.

Therefore, in a typewriter equipped with this paper feeding mechanism, when the paper feeding command key on the keyboard is operated, the carriage is first moved to the approximate center position in the length direction of the platen and then fed to the platen before feeding paper. After allowing the paper meter to guide the sheet approximately at the center in the width direction, the sheet in the stacker is fed to the platen by a predetermined stroke while being guided by the paper meter. After this paper feeding is executed, [Return key operation] will appear on the display.
is displayed, so press the return key to set the paper to 1.
The carriage is moved to the left margin position without advancing one line. After that, normal character printing operations become possible.

Note that when "return key operation" is displayed on the display, key operations other than the return key are ignored.

[Problem to be solved by the invention]

As mentioned above, in a typewriter equipped with a conventional paper feeding mechanism, when "Return key operation" is displayed on the display after paper feeding, only the return key operation is valid, so keys other than the return key, For example, there is a problem in that the carriage cannot be moved to the left margin position using the backspace key or the express backspace key for moving the carriage to the left margin position without paper line feed, resulting in poor operability.

Therefore, it is conceivable to allow operations of the backspace key and the express hackspace key other than the return key after paper feeding is executed. In this case, although normal character printing is considered to start from the moment the carriage is moved to the left margin position by operating the express backspace key, etc., after the carriage has moved to the left margin position, The first return key operation does not perform the return key's original function of feeding the paper into the line, so the return key operation is required again.
There is a problem in that the return key operation after paper feeding becomes complicated.

SUMMARY OF THE INVENTION An object of the present invention is to provide a printing device equipped with a paper feeding mechanism that facilitates line feed processing after paper feeding.

[Means for Solving the Problems] As shown in the functional block diagram of FIG. 1, a printing device equipped with a paper feeding mechanism according to the present invention has input means for inputting characters, symbols, and various commands. , a printing mechanism that includes at least a platen and a carriage, that prints input characters and symbols on a printing medium, a control means that controls this printing mechanism, a paper feeding mechanism that supplies printing medium to the printing mechanism, and a paper feeding mechanism. Paper feeding control means for controlling the printing mechanism and the paper feeding mechanism so as to move the carriage to a substantially central position in the length direction of the platen and feed the printing medium by a predetermined feeding stroke in response to a command. In the printing device according to the present invention, when a line feed command is inputted for the first time after paper feeding is executed by a paper feeding command, the determination command means instructs the control means to line feed the printing medium when the carriage is at the left margin position. It is prepared.

[Effect]

In the printing device equipped with the paper feeding mechanism according to the present invention, when receiving the paper feeding command, the paper feeding control means moves the carriage to a substantially central position in the length direction of the platen and moves the printing medium through a predetermined feeding stroke. The 0 determination command means that controls the printing mechanism and the paper feed mechanism to feed a line by 100 minutes is configured to detect when the carriage is at the left margin position when the first line feed command is input after paper feeding is executed by the paper feed command. , the control means is commanded to line-feed the print medium.

〔Effect of the invention〕

According to the printing device equipped with the paper feeding mechanism according to the present invention, since the determination command means is provided, when the carriage is at the left margin position when the first line feed command after paper feeding is input, Since the original line feed process accompanied by line feed is executed, the number of operations of the return key after paper feeding can be reduced, and the line feed process can be facilitated.

〔Example〕 Embodiments of the present invention will be described below with reference to the drawings.

In this embodiment, the present invention is applied to an electronic typewriter equipped with a paper feeding mechanism.

As shown in FIG. 2, a keyboard 3 is disposed at the front of a main body frame 2 of an electronic typewriter l.
A daisy-wheel type printing mechanism PM is disposed within the main body frame 2 at the rear of the main body frame 2.

The keyboard 3 has character keys including an alpha head key, number keys, and symbol keys, a space key, a return key, a hack space key, and a function that moves the carriage 6 to the left margin position or the left end of the movable range of the carriage 6 without feeding the paper line. The express backspace key to move to the position (absolute origin), the margin release key to temporarily release the left margin position, and various function keys are provided in the same way as normal ones. A paper insert key is provided for instructing automatic paper feeding.

The printing mechanism PM includes at least a platen 5, a motor and its drive circuit that drive it, a carriage 6 directed to a guide rod parallel to the platen 5, a motor and its drive circuit that drive it back and forth in the left and right direction, and a daisy. It has a general configuration including a wheel, a motor for driving the wheel, a driving circuit for the motor, a printing hammer for striking the type on the daisy wheel, a solenoid for driving the hammer, a driving circuit for the printing hammer, and the like. A paper meter 8 is attached to the carriage 6 and has a function of guiding the printing paper fed to the platen 5 along the platen 5.

As shown in FIG. 2, the paper feed mechanism F is installed at the rear of the typewriter L so as to be able to feed paper to the platen 5, and includes a stacker 7 that can store a plurality of sheets of printing paper (cut sheets), and a lower end of the stacker 7. It has a general configuration including a feed roller (path shown) rotatably installed in the section, a feed roller drive solenoid 14 (see Figure 3) to which a clutch (path shown) is connected to drive the feed roller, etc. It is something. As shown in FIG. 3, when the feed roller drive solenoid 14 is excited by the drive circuit 15, the driving force of the platen 5 is transmitted to the feed roller via the clutch, and the feed roller is rotationally driven together with the platen 5. , the printing paper in the stacker 7 is sent out to the platen 5 by a feed roller.

Next, the control system of the electronic typewriter 1 is constructed as shown in the block diagram of FIG.

The control device C includes a CPU 19, an input/output interface 17 connected to the CPU 19 via a bus 18 such as a data bus, a ROM 20, and a RAM 30.

The program memory of the ROM 20 includes a control program that controls the printing mechanism PM in response to code data input from the keyboard 3, a control program that stores the code data in the line buffer 31, and a control program that controls the printing mechanism PM in response to the operation of the paper insert key. Contains the automatic paper feed control program that operates.

The line buffer 31 of the RAM 30 stores input data input from the keyboard 3 and printed for one print line.

The flag memory 32 includes an automatic paper feed flag Fl that is set (data is “1”) when automatic paper feed is executed;
Flag data of a margin release flag F2 that is set when the margin release key is operated to temporarily release the left margin position is stored.

Furthermore, the RAM 30 includes a left margin position memory that always retains (backs up) the memory contents using a backup power source and stores the set left margin position, and a CPU 19.
Various memories, counters, etc. are provided to temporarily store the results of the calculations.

In the current position memory 33, the current position of the carriage 6 (print head) from the absolute origin is sequentially updated and stored in correspondence with the print position.

Next, the automatic paper feeding control routine performed by the control device C of the electronic typewriter 1 is shown in FIG. 4(a).
This will be explained based on the flowchart shown in FIG. In addition, in the figure, 5i (i=1.2.3...) is each step.

When the typewriter 1 is powered on, this control is started, and initial settings such as clearing each of the memories 31 to 33 are first performed (Sl). When the paper insert key is operated (S2/S3: Yes), the platen 5 is first driven by a predetermined amount to eject the printed paper (S4), and then the automatically fed printing paper is In order to guide the meter, the carriage 6 is moved to approximately the center position in the length direction of the platen 5 as shown in FIG. 2, and the current position data in the current position memory 33 is updated (S5). The feed roller drive solenoid 14 is energized and the platen 5 is driven by a predetermined amount, so that the printing paper is line-fed to the platen 5 by a predetermined feed stroke to a predetermined printing start position (36), and the flag Fl is set ( S7), return to S2. Therefore, after the automatic paper feeding is executed, the carriage 6 is in a state where it has moved to a substantially central position in the length direction of the platen 5. still,
At this time, the carriage 6 is located on the lower side (following side) than the left margin position.

After executing this automatic paper feeding, when the first key operated is the return key, that is, when the flag is set high when the return key is operated (S2, S8, 39
: Yes), when the carriage 6 is at a printing position other than the left margin position and the left end position based on the current position data of the current position memory 33 (S10/S13:N
o), and when flag F2 is reset (
S14: No), the carriage 6 is moved to the left margin position without line feeding of printing paper (S1
7), flags F1 and F2 are reset (Si2
).

However, after executing automatic paper feeding, when I repeatedly pressed the backspace key to move the carriage 6 to the left margin position to start normal character printing (S2
S18: Yes), when the carriage 6 is not at the left end position or left margin position (S19, S20, S22
: No), the carriage 6 is moved to the printing position on the upper side of the character bone (preceding side), and the current position data is updated (
S21). Also, operate the margin release key (S
2.S30: Yes), after flag F2 is set (
S31), when the backspace key is operated (S2
- S18: Yes), and when the carriage 6 is not at the left end position (S19: No), S21 is executed.

On the other hand, when the express backspace key is operated (S2/S23: Yes), the carriage 6 is not at the left end position or the left margin position (S24/S25).
・S26: No), when the carriage 6 is lower than the left margin position (S27: No), the carriage 6 is moved to the left margin position and the current position data is updated (32B), and the carriage 6 is moved to the left margin position. If it is higher than the position (S27: Y
es), the carriage 6 is moved to the left end position (S29
).

Also, after operating the margin release key (S2/S3
0: Yes) When the express backspace key is operated (S2/S23: Yes), if the carriage 6 is not at the left end position (S24: No, S25: Y
es), S29 is executed. In addition, S19, S22, S
If the determination is Yes in S24 and S26, a buzzer sounds to warn you.

After that, when the first return key is operated (S2
・S8/S9: Yes), when the carriage 6 is at the left margin position (31Q: Yes), or when it is at the left end position (S 10: No, S13: Yes)
), the printing paper is line fed for one line (Sll),
Flags F1 and F2 are reset (S12).

On the other hand, if the first key operated after automatic paper feeding is a key other than the return key, backspace key, express backspace key, or margin release key (S2: Yes, S8, S1B, S23, S
30: No), the flag F1 is reset (S32),
Processing corresponding to the operated key is executed (S33)
. When the return key is operated after that, it is determined as No in S9, so the printing paper is line-fed by one line (S9).
16), normal line feed processing is executed through S17 and S12. For example, when a character key is operated for the first time after automatic paper feeding is performed, normal line feed processing is performed after character printing.

Therefore, when the carriage 6 is moved to the left margin position or the left end position to start normal character printing after automatic paper feeding, the original line feed process is executed with the first return key operation after the printing operation. The number of operations of the return key after paper execution can be reduced, and line feed processing can be facilitated.

Furthermore, if the first key operated after paper feeding is the return key and the carriage 6 is at a position other than the left margin position or left edge position, line feed processing without line feed is executed, and the character key is first pressed. is also operable, so printing can be started immediately from the moved position of the carriage 6 without operating the return key after paper feeding.

It goes without saying that the present invention can be applied to various printing devices such as a Roman electronic typewriter which is equipped with a floppy disk drive device, a display mechanism, etc. in addition to the paper feed mechanism F.

[Brief explanation of the drawing]

Figure 1 is a functional block diagram showing the configuration of the present invention, Figures 2-
Fig. 4 shows an embodiment of the present invention, Fig. 2 is a perspective view of an electronic typewriter, Fig. 3 is a block diagram of the control system of the electronic typewriter, Fig. 4(a), Fig. 4( b) is a schematic flowchart of the automatic paper feed control routine. ■・Electronic typewriter, 3・Keyboard, 5・
・Platen, 6...Carriage, 19...CPU,
20...ROM (program memory), 30...
RAM, 33...Current position memory, C...Control device, F...Paper feed mechanism, PM...Printing mechanism. Figure 1 Figure 2

Claims (1)

[Claims] (1) A printing mechanism that includes an input means for inputting characters, symbols, and various commands, and at least a platen and a carriage, and that prints input characters and symbols on a print medium, and a control that controls this printing mechanism. means, a paper feeding mechanism for supplying a printing medium to the printing mechanism, and upon receiving a paper feeding command, moving a carriage to a substantially central position in the length direction of the platen and line-feeding the printing medium by a predetermined feed stroke; In a printing device equipped with a paper feeding control means for controlling a printing mechanism and a paper feeding mechanism as shown in FIG. 1. A printing device equipped with a paper feeding mechanism, characterized in that the printing device is equipped with a discrimination command means for instructing the control means to line-feed the print medium when the printing medium is in the line feed state.