JPH0152189B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a type printer, and more particularly to a type printer that controls the striking force of a hammer according to the number of strokes of type to be printed.

[Conventional technology]

In order to improve the print quality in a type printer, it is necessary to control the striking force of the hammer according to the size and image quality of the type to be printed.

For this reason, conventional type printers of this type
Control data for controlling the printing force for each character is stored, and this control data is successively output each time a printing character is selected to execute the printing force control.

Below, an example of a conventional type printer is shown in Figure 1.
This will be explained in detail with reference to FIG.

In FIG. 1, a type storage drum 1 is provided on a drum shaft 2 so as to be slidable in the axial (lateral) direction.
A large number of type plates 3 arranged radially on the outer periphery
is stored. The type storage rotating motor 4 drives the drum shaft 2 to rotate the type storage drum 1. 5 is connected to the type storage drum 1 via a belt 6.
This is a type storage slide motor that slides the printer in the axial direction. The platen 15 has a platen rotation motor 1
6 via a belt 17, and slid in the axial (lateral) direction via a belt 19 by a platen slide motor 18. The paper 20 wound around the platen 15 is pressed down by a paper pressing roller 21. The type plate vertical drive motor 9 drives a belt 10 via a shaft 11 to drive the type storage drum 1.
Among the type plates 3 stored in the , the one at a predetermined rotational position is moved up and down and pulled out in front of the hammer 7. The ribbon 14 interposed between the type plate 3 pulled out before the hammer 7 and the paper 20 wound around the platen 15 is driven by a ribbon motor 12 via a ribbon feed roller 13 .

FIG. 2 shows type characters 22a to 22c and 23a to 23c provided on the type plate 3 in two upper and lower stages.

Next, the printing control device will be explained with reference to FIGS. 3 and 4. Kanji code to be printed by interface signal 30 (generally 2 bytes)
is sent to serial, serial port 3
1 converts the serial data into parallel data and temporarily stores it in the buffer 32. The control unit 33
Based on the Kanji code temporarily stored in the buffer 32, print control data corresponding to the Kanji code is read out from the data memory 34.

As shown in FIG. 4, the control data stored in the data memory 34 is an address Θ (in this example, 8 bits and 2 digits of binary coded decimal) in the rotational direction of the type storage drum 1 for each kanji code. , type storage drum 1
horizontal address SL (horizontal address of type plate 3, in this example 8-bit binary coded decimal 2)
digits), the upper and lower selection addresses ST (1 bit in this example) of the upper printed characters 22a to 22c and lower printed characters 23a to 23c of the type plate 3 (1 bit in this example), and the hammer force code
HS (in this example, 2 bits to switch to 4 levels) is stored.

The control unit 33 controls the type storage rotation motor 4 by the type storage rotation motor driver 40 based on the address Θ out of the control data read from the data memory 34.
is driven to rotate the type storage drum 1 to a predetermined position and stop, and a predetermined type board 3 is selected. Thereafter, the address SL causes the type storage slide motor 5 to move through the type storage slide motor driver 39.
is driven to move the type plate 3 to a predetermined lateral position. Next, the type plate vertical drive motor 9 is driven via the type plate vertical drive motor driver 38 according to the address ST, and a predetermined type is positioned in front of the hammer 7. In parallel with this, the platen slide motor 18 is driven via the platen slide motor driver 35 to move the platen 15 laterally, and the ribbon motor 12 is further driven via the ribbon motor driver 37 to move the ribbon 14. Moving. By the time the selection of the type board 3 and type is completed, the movement of the platen 15 will be completed (if it is not completed, wait until it is completed), so after that, the hammer driver 4 is moved based on the hammer force code HS.
The hammer 7 is driven through one of the transistors 42 to 45 of the printer 1, and a predetermined character on the type plate 3 is struck to print on the paper 20. The resistance values of resistors 46 to 49 connected between transistors 42 to 45 and hammer 7 are for controlling the printing force.

These types of type printers can print, e.g.
If 4000 characters are to be prepared, a storage area of 8 kilobits must be secured in the data memory 34 to store the printing force data.

[Problem to be solved by the invention]

Therefore, conventional type printers have had the disadvantage of requiring a large capacity storage device to store these printing force control data.

An object of the present invention is to reduce the capacity of a storage device in a control device.

[Means to solve the problem]

In order to achieve this object, the present invention includes a plurality of type plates each having a plurality of type characters provided in the horizontal direction and in the upper and lower row directions, and a plurality of type plates arranged in a rotational direction and housed radially, and a rotatable type plate. and a type storage drum that is supported so as to be movable laterally; a type storage rotation motor that rotates the type storage drum; a type storage slide motor that moves the type storage drum laterally; and a type storage drum that rotates the type storage drum. a type plate vertical drive motor that moves the type plate moved up and down in the radial direction of the type storage drum, which has been moved to a predetermined position; a hammer that strikes the type moved to the position to print on paper; a character storage rotation direction address that controls the rotation of the character storage rotation motor in response to an input kanji code; and a character storage rotation direction address that controls the rotation of the character storage slide motor a data memory that generates a type plate horizontal address for controlling the rotation, a type plate vertical address for controlling the rotation of the type plate vertical drive motor, and a printing force for controlling the printing force of the hammer according to the type of type to be printed. In a type printer having an electronic control unit having a control means, the type plate is provided with type letters having the same or similar number of strokes arranged in each type plate and in each upper and lower row, and the type storage drum is configured to control the type plate. The type plates are arranged and stored in the rotational direction in the order of the number of strokes of the type plates, and the type force control means of the electronic control device includes a decoder that decodes the type storage rotation direction address and generates a type force control signal. It is characterized by having the following.

[Effect]

Since the control signal for controlling the striking force of the hammer is obtained by decoding the letter storage rotation direction address using a decoder, there is no need for a special storage device for controlling the hammer striking force.

〔Example〕

Embodiments of the present invention will be described with reference to FIGS. 5 to 8. Note that the mechanical components are omitted from illustration because the only difference from conventional type printers is the arrangement order of the type on the type plate 3 and the storage order of the type plate 3 on the type storage drum 1. , the same reference numerals are given to the same components as those of the conventional type printer, and detailed description thereof will be omitted.

For each type plate 3 or each row of each type plate 3,
Type letters with the same number of strokes or a neighboring number of strokes are arranged side by side, and each type plate 3 is arranged in the order of the number of strokes of the type letters and the type storage drum 1 is arranged.
is stored in. In the data memory 34, as shown in FIG. 6, the control addresses Θ, SL, and ST excluding the hammer writing force code HS are stored in the kanji codes in the order of arrangement of the type plates 3 stored in the type storage drum 1. be stored in relation to

A hammer signal decoder 50 as shown in FIG. 8 is provided between the control section 33 and the hammer driver 41.

The control unit 33 reads out addresses Θ, SL, and ST from the data memory 34 in accordance with the kanji code input by the interface signal 30, and controls the type storage rotation motor 4, the type storage slide motor 5, and the type plate vertical drive motor. 9 to position a predetermined type in front of the hammer 7. At the same time, the address Θ is given to the hammer signal decoder 50.
The printing force control signal is obtained by decoding into steps.

For example, as shown in Fig. 7, the addresses Θ are numbered 0 to 39, 0 to 9 are a group of type plates with type having the first type, and 10 to 19 are type having the type having the second type. The set of type boards 20 to 29 are the type board group with the type of the third printing force, and the part 30 to 39 are the type board group with the type of the fourth printing force. Then, if necessary, type characters with the same number of strokes or with a neighboring number of strokes are provided in the upper and lower rows. Then, as shown in FIG. 8, the hammer signal decoder 50 decodes bits A5 and A6 to obtain the first stroke force control signal from 56, the second stroke force control signal from A56, and the third Force control signal is A6
The fourth printing force control signal is obtained from input terminal 5 of AND gates 51 to 54 so as to be obtained from A5A6.
Connect 1a to 54b. Note that 5 is the negation of A5, and 6 is the negation of A6.

If the printing force control signal is obtained in this way, no special control data is required for controlling the printing force.
Therefore, no storage device is required for this control data.

〔Effect of the invention〕

According to the type printer of the present invention as described above, since the printing force control signal can be obtained by decoding from the printing stock rotation address, there is an effect that a special data storage device for controlling printing force is not required. can get.

In addition, since the number of strokes of the type characters on one type plate is the same or close to each other, in injection molding, the molding pressure can be adjusted for each type plate, which is convenient in terms of molding.

[Brief explanation of drawings]

Fig. 1 is a schematic perspective view of a conventional type printer; Fig. 2 is a front view of its type plate; Fig. 3 is a block diagram of its control device; Fig. 4 is a configuration diagram of its control data memory; FIG. 6 is a block diagram of the control device according to the present invention, FIG. 6 is a block diagram of its control data memory, FIG. 7 is a block diagram of an address block of a type storage, and FIG. 8 is a circuit diagram of a hammer signal decoder. DESCRIPTION OF SYMBOLS 1... Type storage drum, 3... Type board, 4... Type storage rotating motor, 7... Hammer, 33... Control unit, 34... Data memory, 40... Type storage rotating motor driver, 41... Hammer driver, 5
0...Hammer signal decoder.

Claims (1)

[Scope of Claims] 1. A plurality of type plates each having a plurality of type characters provided in the horizontal direction and in the upper and lower row directions; and the plurality of type plates are arranged in a rotational direction and housed radially, and rotated and moved in the lateral direction. a freely supported type storage drum; a type storage rotating motor for rotating the type storage drum; a type storage slide motor for laterally moving the type storage drum; a type plate vertical drive motor that moves the type plate moved up and down in the radial direction of the type storage drum; and a type plate vertically moved to a predetermined position by rotation and lateral movement of the type storage drum and vertical movement of the type plate. a hammer that hits the printed type to print on paper; a type storage rotation direction address that controls the rotation of the type storage rotation motor in response to an input kanji code; and a type storage rotation direction address that controls the rotation of the type storage slide motor. A data memory that generates a horizontal direction address of the type storage, a vertical direction address of the type plate for controlling the rotation of the type plate vertical drive motor, and a printing force control means that controls the printing force of the hammer according to the type of type to be printed. In a type printer having an electronic control device, the type plate is provided with type characters having the same or similar number of strokes arranged in each type plate and in each upper and lower row, and the type storage drum is configured to control the type plate so that the type plate is connected to the type plate. The printed characters are arranged and stored in the rotational direction in order of the number of strokes of the printed characters, and the printing force control means of the electronic control device includes a decoder that decodes the printing stock rotation direction address and generates a printing force control signal. A type printer featuring: