JPS612581A - Ribbon feeder in japanese character typewriter - Google Patents

Abstract

PURPOSE:To enable a ribbon feeding width to be properly changed in accordance with the size and kind of types, by providing a controlling part comprising as a main element a counter which counts pulses fed from a pulse generator and sends a starting signal to a driving circuit so as to take up a predetermined amount of a ribbon. CONSTITUTION:First, a required type plae is set on the typewriter, and a type size selecting switch PS1 is operated in conformity to the type size. Next, when type selection is conducted by the operator and printing is started, 4-bit data values in an encoder 5 are inputted, and the counter 4 is preset. When printing is finished, the level at an output terminal CD is changed from a low level to a high level, and inputting of a pulse to an input terminal CLK is waited for. When a pulse is outputted from the pulse generator 3, a pulse motor 1 is advanced by one step, and one is subtracted from the value set on the counter 4. When the count in the counter 4 is reduced to 0, the level at the output terminal CD of the counter 4 becomes a low level, and a low-level signal is inputted to an input terminal OE of the pulse generator 3, whereby outputting of pulses is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a ribbon feeding device in a Japanese typewriter.

Prior Art The ribbon feeding device in conventional Japanese typewriters is powered by the movement of a key lever or solenoid for printing, and the ribbon is made to be disposable after one printing. The ribbon is fed at a constant width even when the type size and type are different. Therefore, in order to prevent the ribbon from being used multiple times, it is necessary to set the maximum ribbon feed width. Even though small type is used, the ribbon feed is the same width as large type, and even if the size of the type is the same, depending on the type of type, type 2 requires less ribbon or more ribbon. However, in the ribbon feed of conventional Japanese typewriters, the ribbon is always fed to the maximum according to the type that uses a large amount of ribbon, resulting in wasted ribbon.

In order to feed the ribbon just the right amount for printing of various sizes, it is necessary to use a complicated adjustment device as in Japanese Utility Model Publication No. 37-25205 (Utility Application No. 34-53933), and the ribbon is constantly fed. It was necessary to adjust the feed suspension.

However, in this ribbon feeding device, the ribbon feeding amount is manually set to an approximate value, and the mechanism must be adjusted to ensure reliable operation due to reasons such as torque fluctuations corresponding to the amount of ribbon winding. , and it was difficult to maintain it.

Problems to be Solved by the Invention An object of the present invention is to eliminate the above-mentioned drawbacks and provide a ribbon feeding device for a Japanese typewriter that can appropriately change the ribbon feeding width according to the size and type of typeface. There is a particular thing.

Means for Solving the Problems The ribbon feeding device in the Japanese typewriter of the present invention is as follows:
A pulse motor for winding the ribbon, a drive circuit for driving the pulse motor, a pulse generator, and a type
a printing completion detection means for detecting the completion of printing by detecting the position of the bar, a type size setting means selected by type nice, and a printing completion detection means that detects the completion of printing when the printing completion detection means detects the completion of printing. The present invention has a configuration characterized in that it has a control section mainly including a counter that counts and sends a start signal to the drive circuit so as to wind up a predetermined amount of ribbon.

When the operator selects the type size of the type plate to be used with the type size setting means and prints, this is detected and input to the counter, the counter counts the pulses from the pulse generator, and the drive circuit A pulse motor is activated to wind up a predetermined amount of ribbon depending on the size and type of type.

Embodiments Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

In FIG. 1, 1 is a pulse motor for winding up the ribbon of a Japanese typewriter, 2 is a drive circuit for driving the pulse motor 1, and 3 is a pulse generator that is a clock pulse generator, with an input terminal OE. When becomes H level, pulses are generated at regular intervals. 4 is a subtraction counter, and when the preset input terminal PR goes to L level, the output terminal C
When D becomes H level, the pulses from the pulse generator 3 inputted from the input terminal CLK are counted, and one count is subtracted from the preset data for each pulse. When the count reaches 0, the output terminal C , D is lowered to L level. 5 is a decimal binary 4-bit encoder, 6
is the input buffer 7 of the counter 4 terminals PR and ST.
Reference numeral 7 denotes a transistor which performs ON-OFF switching of the voltage applied to the pulse motor 1, and 8 indicates ON-OFF switching of the voltage applied to the pulse motor 1
an invert buffer that inverts the signal to perform FF;
9 is a control section of this device.

R8I is a type size setting switch which is a type size setting means, and is a switch for setting the ribbon feed width depending on the type size such as 5 points, 12 points, etc.
In this embodiment, a rotary switch is used.

The type size setting switch PS1 is connected to the counter 4 via the encoder 5, and TS is a printing completion detection means, which in this embodiment is composed of a type bar position sensor.
It is connected to the preset terminal PR and start terminal ST of the counter 4 via the input buffer 6, and outputs an H level when the type bar starts returning after hitting the platen.

MS is a manual ribbon feed switch, which is connected to the input buffer 16 and is used when feeding one character individually.

Next, the operation of the embodiments of the present invention described above will be explained.

First, set the required type board in the typewriter, and operate the type size selection switch R8I according to the type size of the type board.For example, if 7 steps of ribbon feeding are required, decimal binary 4 The output bits 1, 2.4 of the bit encoder 5 are turned ON, and the output bit 8 is turned OFF.

Next, when the operator selects type and starts printing, the input buffer 7 is moved by the output of the type bar position sensor TS.
6, the input terminal PR of the counter 4 is at L level (the input terminal ST operates at H level), and the value 7 of the 4-bit data of the encoder 5 is input, and the counter 4 is preset.

When printing is completed, the input terminal PR and input terminal ST of the counter 4 go to H level via the manual buffer 6 by the output of the type bar position sensor PS, the preset state is canceled and the count becomes possible, and the output terminal C
The level of D @: is changed from L level to H level, and a pulse is input to the input terminal CLK.

When the output CD of counter 4 becomes H level, generator 3
becomes operational, outputs pulses, and the base of transistor 7 becomes L level via invert buffer 8, transistor 7 is turned on, voltage is applied to pulse motor 1, and pulses are output from pulse generator 3. Then, the pulse motor 1 advances by one step, and
The value set in counter 4 (here 7 in decimal notation)
) is subtracted one count at a time and when the value becomes O, the level of the output terminal CD of the counter 4 falls from the H level to the L level.

Then, when the output terminal CD of the counter 4 becomes L level, this is inputted to the input terminal OF of the pulse generator 30, and the output of pulses is stopped. With this, counter 4
and the operation of the drive circuit 2 are stopped, and the pulse motor 1 is stopped.

Further, the transistor 7 is also turned off when the input of the invert buffer 8 becomes L level, and the pulse motor 1 is in a free state with no voltage applied to it, and when the shaft of the pulse motor 1 is turned by hand, the ribbon is wound. It is also possible to prevent the temperature of the pulse motor 1 from rising.

From the above results, it can be concluded that the ribbon is wound and removed by the amount equivalent to 7 pulses by the pulses from the pulse generator 3, and this operation is repeated every time a print is made. will wind up the ribbon for 7 pulses.

In addition, as shown in FIG. 2, the output terminal C of the counter 4
If D and manual ribbon feed switch MS are connected to the input terminal OF of pulse generator 3 via OR goo 1-10, pulse motor 1 will rotate only while manual ribbon feed switch MS is pressed, and the ribbon can be moved arbitrarily. It is also possible to wind it up to a length of .

In this embodiment, the counter 4 is a subtraction counter, but an addition counter type configuration is also possible.

FIGS. 3 and 4 show another embodiment of the present invention, in which 11 is a replaceable type plate, and 12 is the type plate 11.
13 is a magnetic sensor type proximity switch provided on the receiving frame 12, and is composed of Sl, S2, S4, and S8; 14 is the proximity switch 1 provided on the typeface 11;
3 is a magnet that turns ON/OFF.

In the embodiment shown in FIGS. 1 and 2, the type size setting switch R81 was manually set using a rotary switch as the type size setting means, but in this embodiment, a magnetic sensor was used to set the type size on the type plate 11. When set on the receiving frame 12, the type size is automatically set.

For example, if seven steps of ribbon feeding are required, the proximity switch 1 of the typeface 11 should be set so that the proximity switches 81, 82, and 84 are turned ON and the proximity switch S8 is turned OFF.
A magnet 14 is provided on the receiving frame 14 facing the four proximity switches 81. S2. If the output signals of S4 and S8 are regarded as the output signals of the decimal binary 4hi1- encoder 5 shown in FIG. 1, the subsequent operation will be the same as in the embodiment shown in FIGS. 1 and 2.

FIG. 5 shows another embodiment of the present invention, in which 1 is a pulse motor for winding up the ribbon of a Japanese typewriter;
2 is a drive circuit for driving the pulse motor 1, and 3 is a clock pulse generator, which generates pulses at regular intervals when the input terminal OF reaches the F'' level. 4 is a subtraction counter, and when the input terminal PR becomes L level and then I] level, it becomes an output terminal CDIfiI level, and counts the pulses from the pulse generator 3 that are input from the input terminal CLK. One count is subtracted from the data for each pulse, and when the count reaches O, the output terminal CD is lowered to L level. 6 is the input buffer of input terminals PR and ST of counter 4? , 7 are transistors that turn on the voltage applied to the pulse motor 1.
・8 is the ON/OFF of the transistor 7.
This is an invert buffer that inverts the signal in order to perform this.

R8I is a type size setting switch. In this embodiment, a rotary switch is used. The type size setting switch R81 inputs the type size to the central processing unit (hereinafter referred to as CPU) 15 via the input/output port PMO (1). Output.

TS is a printing completion detection means, which in this embodiment also consists of a type bar position sensor, and the data is sent to the input/output port P.
Through IO(1), TCPLJ 15D, when the type bar rises after printing starts, it outputs L level, and when the type bar starts to return after hitting the platen, it outputs H level.

16 is a coordinate encoder, which is the horizontal X of the type to be printed.
The position data of the row and the vertical Y column is output to the CPLJ 15 via the input/output port PIO(3). 17 is an IC memory serving as a storage device, in which the feed width table for the European language room is written in advance, and CPLJ15 is an input/output port PIO (
2), and the input/output port P20(2) is connected to the input terminals PR and ST of the counter 4 via an input buffer 6. In this way, type size setting switch R81, input/output port P
ro (1) to (3), CPU15. Coordinate encoder 1
6 and IC memory 17 constitute a type size setting means. Regarding the arrangement of the feed width table in the European language room,
This will be explained below.

In principle, the center of the Japanese typeface is aligned with the center of the nominally sized square, but in European type, the width of each character is different, so the center of the character is cast closer to the left side of the nominally sized square. When printing such a Latin text, the ribbon is naturally only 8 times the width of the characters! l will not be spent,
Ribbon feeding also needs to match the width of the characters to avoid waste.

For example, assume that the area from rows Xm horizontally to rows Xm→-n and columns Yp to yp +q vertically is arranged so as to accommodate such a Roman room, and
Sequentially from the vertical Yp column of the 1st row to the tank Xm + the vertical Yl of the nth row) + Q
Create a two-dimensional tilt pull up to the columns, and let Xi and "y'j be the data indicating the character coordinates of rows Xi horizontally and columns Yj vertically.

Normally, the width of a character varies depending on the nominal type size even if the character type is the same, so if there are seven types of type size, seven tables are created as shown below.

Table TI (I) Table T2 (I) Table T7 (■) In this embodiment, an index table whose data is the leading address of the character width table in correspondence with the order of size of the typeface is provided as follows.

As with the index table, the character width table starting addresses T1→-O are for the minimum print size, and addresses T7+0 are for the maximum print size.

Then, in the flowchart 106 shown in FIG.
Subtract the minimum font size code from the font size code corresponding to the font size read in step 103, add the suffix of the first address of the character width table in the index table, and add the address (address) where the first address of the character width table is stored. Calculate the suffix of.

For example, if there are seven types of type sizes from 4P to IOP, and the type size code is assigned to the smaller type size, the result will be as follows: If the type size is 5P, the τ type size code is 2, and the minimum type size Since the code is 1, the address of the index table that has the first address of the character width table as data is the first index address of the index table + type size code - minimum type size code 0 + 2 - 1 = 1, and the type If the size is 5P, it is stored at address IT1 of the index table. Next, the content T2+O is read out, read into the address register, and further written in horizontal Xi lines and vertical Y lines for that typeface size.
The following calculation is performed using the I-compression formula (A) that calculates the suffix of the address of the printed character located at the position corresponding to the coordinates of column j.

Z= (i-m)X (Q +1>+ (, j-1)
)...(A>(A>) Adding the suffix of the first address of the character width table stored in the address register to the value 7 calculated by the formula, the character width table corresponding to Xi and Yj is obtained. This is the suffix of the storage address of .Here, m is the minimum number of rows indicating the start of character coordinates, p is the minimum number of columns indicating the start of character coordinates, and p+q is the maximum number of columns indicating the end of character coordinates. be.

For example, if i is in row m+1 and j is in column l]+1, then Z=
(m +1-m)X (Q +1>+ (+1 +
1-p)-q+2, and set this value Z to the first address T2+O of the character width table.
When added to the suffix + O, the suffix becomes 2
+(q +2), and T2+((1'+2) is the storage address for the character width data, so read the content, convert it to the number of ribbon feeding pulses, and set the preset data of counter 4 in Figure 5. Output.

Next, the operation in another embodiment of the present invention will be explained based on the flowchart shown in FIG.

First, a typeface of the typeface size to be printed is set in the typewriter, and the typeface size setting switch R81 is set.

Next, when the operator selects type and turns on the print key, less than 100 subroutines are executed. At step 101, the typeface is fixed, at step 102, the character coordinates of the X line and Y column of the type to be printed are read, and at step 103, the preset type size is read.

At 104, the characters to be printed from the coordinate data of the character coordinates read at 102 are Japanese or Roman.

If it is other than that, the process branches to step 105, executes other necessary processes such as error processing, and then returns.

If the type is Japanese, set the Japanese platen feed parameter in step 10, calculate the ribbon feed parameter in step 110 from the type size read in step 103, and then store it in the IC memory 17 as the number of ribbon feed pulses. do.

If the print is in European letters, use the calculation formula <A) at 106 to calculate IC.
Search the character width from the memory 17 from the character width table, and
After setting the European platen feed parameters in 07, 1
In 08, after calculating the ribbon feeding parameters from the character width data retrieved in 106, the ribbon feeding pulse is
It is stored in the C memory 17.

Then, turn on the type bar drive device at 111, and
At step 12, it is compared whether the marking sensor is at L level or not, and if it is at L level, the drive of the type bar is turned off at step 113.
If it is not at the level, the process returns to 112 again.

At 114, the number of ribbon feeding pulses stored in the IC memory 17 at 108 or 110 and the preset signal, that is, the L level signal to the buffer 6, are sent via the input/output port PIO (2), which is the input/output port in FIG. counter 4
At step 115, it is compared whether or not the marking sensor is at 1 level.

If the level is H, the process advances to 116, and if it is not the H level, the process returns to 115.

116, input/output port PIO(2) to input buffer 6
The counter 4 is started by outputting an H level signal through the counter 4, and the subsequent operation is completely the same as that of the embodiment shown in FIG. 1, and therefore will not be described here.

Then, platen feeding is started at 117, and a return is performed after releasing the type board at 118, and this operation is repeated every time the print key is pressed to accurately feed the ribbon by the required amount.

Effects of the Invention As described above, according to the ribbon feeding device for a Japanese typewriter of the present invention, the ribbon feeding width can be changed appropriately according to the size and type of type, and the ribbon used for each type can be adjusted. Since only the amount that matches the amount is sent accurately, wasteful use of ribbon can be prevented and it is economical.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a block diagram of the main part in which an OR gate is provided in the same manner as above, FIG. 3 is a block diagram of another embodiment of the present invention, and FIG. FIG. 5 is a block diagram of another embodiment of the present invention, and FIG. 6 is a flowchart showing the operation of the same. DESCRIPTION OF SYMBOLS 1...Pulse motor, 2...Drive circuit, 3...Pulse generator, 4...Counter, 5...Encoder, 6...Input buffer, 7...Transistor, 8...
... Invar 1-buffer, 9... Control section, 10...
・OR gate, 11... Type board, 12... Receiving frame, 1
3... Proximity switch 14... Magnet, 15... Central processing unit, 16... Coordinate encoder, 17... IC
Memory, R8I...Type size setting switch, TS...
...Type bar position sensor, MS...Manual ribbon feed switch, SL, 8284, S8...Proximity switch, Pro (1), PIO (2), PIO (3)...
Input/output port. Patent applicant: Takeshi Umemura Patent attorney: Tsukasa Takemoto (
1 idiot) Figure 1 Figure 2

Claims (3)

[Claims] (1) A pulse motor for winding the ribbon, a drive circuit for driving the pulse motor, a pulse generator, a printing completion detection means for detecting the position of the type bar to detect printing completion, and a type size When the type size setting means selected by and the printing completion detecting means detect the completion of printing, a start signal is sent to the drive circuit to count the pulses from the pulse generator and wind up a predetermined amount of ribbon. 1. A ribbon feeding device for a Japanese typewriter, characterized by having a control section mainly consisting of a counter. (2) Claim 1, wherein the type size setting means is connected to a detection means for detecting the type of type board set in the typewriter, and automatically outputs a code corresponding to the stored type size. Ribbon feeding device in the Japanese typewriter described. (3) a storage device in which the type size setting means stores the character width of each horizontal row and column position of each type type housed on the type board;
A coordinate encoder that detects and outputs the horizontal and vertical rows and columns of housing positions of characters selected by printing, and a central processing unit that reads the contents of a predetermined location of the storage device from the output of the coordinate encoder and outputs this to a counter. A Japanese ribbon feeding device for a typewriter according to claim 1.