JPS58177362A - Printing mechanism for type printer - Google Patents

Abstract

PURPOSE:To reduce the noise of printing by using a system in which the type selecting operation and printing operation of a type head wheel are made in a steady rotation state and printing is made by rotationally moving a type roller provided on the peripheral edge to the position to be printed. CONSTITUTION:When a type head wheel 4 turns and a carriage 3 stops at a printing position, a type roller 11 to be printed is concurrently selected by a pulse signal by a photo sensor 19 while it is kept in the steady rotation state. Then, a print solenoid 14 is excited to push the type roller 11 by a hammer 13 when it passes through the position to be printed of a printing paper P. Printing is then made by pushing an ink ribbon 15 while repeating the feeding of the carriage and the operation of the hammer. Thus, the noise of printing can be greatly reduced and thereby the needs for expensive servo motor and its peripheral circuits can be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to printing 1FM411f of a printer used as a data communication terminal or an output device of a computer, and particularly to a printing mechanism of a type printer using a matrix printing method.

General ◆ As terminal devices for data communication, printers with a matrix printing method, which has excellent printing quality, are often used. In conventional type printers of this type, the basic operations of the printing mechanism, such as type selection and positioning of the card I/J and feed, are performed mechanically. The type head was rotated forward and backward by a motor, stopped at the desired position, and printed), and was driven intermittently (the type head was rotated forward and backward by a motor, stopping at the desired position to print), so there were restrictions on speeding up due to motor performance and mechanical rigidity, and there were also For intermittent drive
This required an expensive servo motor and peripheral circuitry to control it. For this reason, the printing mechanism of conventional type printers has had problems such as difficulty in achieving higher speeds and lower prices.

Furthermore, conventionally, type printers capable of printing Kanji characters have been provided. However, conventional type printers for kanji are either: (1) Picking up the desired type from a dial on which the type is arranged in a flat plate and printing it; or (2) Inscribing the type on the outside S surface of a drum with a diameter of 20 to 30 cIL. , the desired type was selected by rotating the drano in forward and reverse directions and moving in the axial direction, and printing was done by pressing the copper printing paper against the type, so the mass of the dial and drum was quite large.・Therefore,
Conventional type printers for kanji require a large amount of driving force to control the position of the dial and drum, and the type selection mechanism is large-scale, making it difficult to downsize or increase speed. .

Furthermore, the conventional type-type printers and links all had the problem of large printing noise because the typeface of the type was pressed against the printing paper.The present invention was developed in view of the above circumstances. The purpose of the present invention is to provide a printing mechanism for a movable type printer that can be made smaller, faster, lower in price, and furthermore, can reduce printing noise. That is.

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

Broom Figures 1 to 13 are diagrams showing an embodiment of the first invention of the present invention. The printing mechanism of the character-type printer shown in these figures is mainly for printing alphabets, kana characters, numbers, and the like. First, the schematic configuration will be explained with reference to FIGS. 1 to 3. In these figures, 1 is the main body, 2 is the platen, 3 is the carriage, and 4 is the main body.
is the type head wheel. The platen 2 is rotatably supported inside the main body 1. A paper feed motor 5 fixed to the main body l is connected to one end of the platen 2. A knob 6 is fixed to e4e of the platen 2.The carriage 3 is supported inside the main body 1 so as to be able to move in parallel along the platen 2. motor 8
The carriage string 9 is connected to the carriage string 9, and the carriage motor 8 controls the position of the carriage string 9.

This carriage 3 is equipped with a wheel motor 10 for rotating the type head wheel 4 into the rotating portion 1.The type head wheel 4 is fixed to the shaft of the wheel motor 10 so as to face the platen 2. The type head wheel 4 is provided with a predetermined number of type rollers 11, 11, etc. along a part of its outer circumference, as will be described in detail later.The number of type rollers 11, 11, and so on is normal. There are 96 pots or 128116i in carriage 3.
a desired type roller 11 of said type head wheel 4;
A hammer mechanism 12 is provided for pushing out toward a printing area on the printing paper P arranged along the platen 2. The hammer mechanism 12 is connected to the III letter head wheel 4.
It consists of a pair of hammers 13 extending so as to sandwich the two, and a print solenoid 14 for driving the hammers 13.

Further, an ink ribbon 15 is stretched along the platen 2. The ink ribbon 15 is supplied from a ribbon feeder 16 and wound onto a reel 18 whose rotation is controlled by a ribbon feed motor 17.

In addition, reference numeral 41G is an optical sensor for determining the rotational position of the type head wheel, 20 is a power source, and 21 is each motor 5.
．． 8.10.17 etc. ・Next, the structure of the type head wheel 4 will be explained with reference to FIGS. 4 to 8. ・The type head wheel 4 consists of a pair of A predetermined distance 111jI! so that the disks are parallel to each other! a wheel 26 fixed to the detail 25 and a type roller 11 disposed along the outer periphery of the wheel 26;
．． 11... In this case, the outer peripheral edge of the wheel 26 has a predetermined number of notches ++1)27.271.・ is formed toward the outside in the inner diameter direction of the wheel 26, and the type roller 11.11
... are arranged in the respective notches 27, 27, ... so that each axis faces the thickness direction of the wheel 26. Also, near the outer peripheral edge inside the wheel 26, the type roller 11 .1.1... The hook ring 28 as a positioning mechanism and the type roller 11, 11... are cut out 2.
A magnet ring 29 serving as a roller return mechanism that urges the rollers 7, 27, etc. toward the inner ends is coaxially fixed to the wheel 26. Also, 1Il of the wheel 26
rk1 has notches j27, 27, . . . at positions radially corresponding to the aforementioned notches 27, 27...

The same number of small holes 30, 30... are bored. One of these small holes 30, 30... is formed larger than the others, and is used as a marker 30 for character selection, which will be described later.
As shown in FIGS. 7 and 8, the type roller 11 is formed so as to protrude a predetermined length from both side surfaces of the wheel 26, and has both ends. A retaining portion 11 formed in a cylindrical shape with a diameter that matches the notch 27 of the wheel 26 on its side.
m, 11i. The portion located between the wheels 26 is formed to have a larger diameter than the engaging portions 11a and 11m, and a convex type portion 11b is partially formed on the outer peripheral surface of this large diameter portion. When formed, the same type part 1
A V-shaped #11c extending in the length direction of the type roller is formed on the side substantially opposite to 1b. This groove 11c allows the type roller 11 to return to the wheel 26 at the return position (notch 27).
hook 2 of hook ring 2B)
8 and is used to position the type portion lie with respect to the wheel 26. Further, in this case, the type roller 11 is molded from synthetic resin, and its surface is coated with a hard magnetic material such as Ni or Co.

Based on the above configuration, the type roller 11 is urged inward in the radial direction of the wheel 26 by the magnetic force of the magnet ring 29 as a return mechanism, and is movable along the notch 27. It is supported as such.

The type head wheel 4 configured as described above is rotated at a constant speed by the wheel motor 10, and is moved along the platen 2 by the carriage 3#.

Next, the control system of the printing mechanism will be explained with reference to FIGS. 1 to 9.

FIG. 9 is a block diagram showing the control system C of the printing mechanism. In this figure, the same components as in FIGS. 1 to 3 are given the same reference numerals.

First, the wheel motor 10 is rotated at a constant speed (9ooorpm in this embodiment) by a wheel motor control 37 based on a signal input from an interface 35 to a CPU 36 (in this case, a power-on signal). Reference numeral 19 is installed with its detection portion facing the small holes 30, 30, . . . of the type head wheel 4 shown in FIG. Small holes 3o, 3o...
is optically detected and converted into an electrical signal, and the CPU 36G outputs it as a pulse signal.The resulting pulse signal has a different size from that of the other small holes 30, 30, etc. caused by the marker 30m. The rotational position of the type head wheel 4, that is, each position of the type rollers 11, 11, . . . is input to the CPU 36 based on the pulse signal generated by the marker 301. Further, the print solenoid 14 is driven by the actuator driver 38f. Actuator driver 3
8 activates the print solenoid 14 at the timing when the designated character roller 11 rotates to the printing position based on the designation signal of the character to be printed from the interface 35 and the signal of the character roller position from the optical sensor 19. Drive. The carriage motor 8 is driven and controlled by a carriage motor control 39 and a carriage motor driver 40, and feeds the carriage for each print line based on the detection output of an origin sensor 41 that detects the position of the carriage 3. Furthermore, the paper feed motor 5 is driven and controlled by a paper feed motor control 42 and a paper feed motor driver 43 based on an output signal from the CPU 36, and the paper feed motor 5 rotates the platen 2 to feed the printing paper.・Ribbon feed motor 17 is used for line feeding, etc.
Based on the output signal of the PU 35, the ribbon feed motor control 44 and the ribbon feed motor driver 45
In this case, the carriage 3
, the winding is controlled in conjunction with the operation of the print solenoid 14 to ensure efficient ribbon consumption.

Next, with reference to Figure @10, an example of controlling the above-mentioned printing curvature structure will be explained. In this figure, () shows the carriage feed signal, (b) shows the detection signal of the type roller position by the optical sensor 19, () shows the timing of type selection, and (d) shows the timing of excitation of the print solenoid. There is. In this case, it is assumed that the type head wheel 4 is being rotated at a constant speed of 9000 rpm. In the figure (→), the rising at t indicates the start of feeding of the carriage 3, and the falling at t is as follows: Indicates the stationary position of the carriage 3. In this case, the carriage 3 is moved one character between t and t.
4, carriage 3 is advanced by two characters. In this example session, the carriage 3 has a feeding time of one character ('
*'t) is lQms, the sending time for 2 characters ("4'l
) is controlled to be 15m5. Also, (C
)G As shown, selection of the type rollers on the type head wheel 4 is started at the same time as the carriage 3 stops at the printing position.・Type selection time (“@ 'Iv1, -
1. etc.) is determined by the position of the type to be selected on the type head wheel 4, but in this case, the rotation speed of the type head wheel 4* (9000 rpm) is determined by the maximum 7
control is performed so that the average time to m is 4 ms.

In addition, at the timing ('1%'l) at which type selection ends, the print solenoid is energized, and the type roller to be printed is pressed against the printing paper by a hammer. Furthermore, carriage feeding is started at the timing (thts) of completion of character selection.Therefore, the printing operation by the hammer is performed simultaneously with the carriage feeding operation. The printing operation requires 1 m s, and therefore, in this case, the average printing time per character T is 15 m5, and the average printing time is 66.7 characters/S. As mentioned above, the printing speed is mainly determined by the speed of the carriage feed and the rotation of the type head wheel 4, and unlike the printing mechanism of a conventional type printer, the printing speed is determined by the intermittent operation for selecting type. Since this is not done, it is possible to increase the printing speed without being limited by mechanical rigidity, motor performance, etc.

Next, the operation of the above printing mechanism will be explained with reference to Figures 1 to 13. First, when the power is turned on, the type head wheel starts rotating and at the same time the carriage 3 moves to the initial setting position. When a print signal is input, the carriage is fed and printing is performed by the type roller according to the control method shown in FIG. 11II and 110 described above. That is,
At the same time as the carriage 3 stops at the position to be printed, selection of the type roller 11 on the type drive wheel 4 to be printed is started. This type selection is performed based on a pulse signal from the optical sensor 19, and when the type roller 11 to be printed passes the portion of the printing paper to be printed while the type head wheel 4 is rotating steadily, the hammer 13 is activated. Print solenoid 14 is energized to push type roller 11 toward the paper to be printed. Then, the type roller 11 sandwiches the ink ribbon 15 and prints on the printing paper.The carriage feed and function 13 as described above are carried out.
Printing is performed by repeating the printing operations. The above printing operations will be explained in detail with reference to FIGS. 11 to 13. As shown in FIGS. 11 and 12, the type roller 11 pressed against the printed area by the hammers 1B and 13 moves in a direction substantially along the surface of the printed area ([11 direction of arrow E)
・For this reason, the type roller 11.11 rolls the surface of the printed part due to the friction between it and the printed part, and the printed part on the outer surface of the type roller 11 rolls onto the printed part. and the hammer 13 is engaged with the type roller 11. Then, the type roller 11 is attracted by the magnet ring 29 and pulled back toward the center of the wheel 26 while rotating. Then, the +411C of the type roller 11 and the hook 28m of the hook ring 28 are engaged, and the type roller 11 is positioned at a predetermined angle. is notch 27
It moves and stops at the inner end.

As described above, in the printing mechanism of the present invention, the type roller 11 rolls on the printing target area to perform printing, so compared to the conventional printing mechanism in which type is struck, printing noise can be reduced. I can do it. In addition, since type selection and printing operations are performed with the type head wheel 4 constantly rotating,
There is no need for an expensive servo motor or a peripheral circuit for controlling the servo motor as in the past, and it is possible to reduce costs. Further, as described above, since no intermittent operation is performed for character selection, it is easy to increase the printing speed.

Next, an embodiment of the printing mechanism of the invention @2 of the present invention will be described with reference to FIGS. 14 to 1118.

First, the outline of the printing mechanism will be explained with reference to FIGS. 44 and 15. In these figures, reference numeral 50 indicates a frame. The frame 50 is formed in a rectangular frame shape, and the front and rear portions are rails SOA and SOB that support the carriage frame 51 so as to be movable in the '-G direction indicated by the arrow.

The carriage frame 51 moves the carriage 52 in the direction of arrow H-
It is supported movably in the I direction, and the left and right sides are carriage rails 53a and 53b. A drum 55 (an assembly of seven types of type head wheels) having a plurality of type head wheels arranged coaxially with each other is rotatably attached to the carriage frame 51 with its axis directed in the direction of arrow H--I. A platen 56 is rotatably attached between both side frame portions of the frame 50. In the above 1llFItf, the drum 55 is moved along the upper surface side of the platen 56 along the rail 5011%sob as shown by the arrow F. - In the G direction, the carriage rail again! $3m, 53b
It is movable in the direction of arrow H-I along.

In this case, as a drive mechanism for the drum sO as described above,
A carriage motor 57 and a carriage string 5 for moving the carriage frame 51 in the direction of arrow PG.
8 and a carriage 52 in the direction of arrow H-I, and a shaft motor 60.

Further, a drum motor 61 fixed to the carriage 52 is connected to @55a of the drum 55, and the drum 55 is rotated at a constant speed by the drum motor 61. The rotation of the platen 56 is controlled by a paper feed motor 62.

As shown in FIGS. 16 and 17, the drum 55 is connected to the type head wheel 4 shown in FIGS. 4 to 6 described above.
It is made up of multiple units coaxially located in the same city.
Each of them is provided with a predetermined number of type rollers 11, 11, . . . .

In addition, as a hammer mechanism, as shown in Figure 18,
One print solenoid 63 is fixed to a portion of the carriage frame 51 located above the platen 56, a shaft 64 is fixed to the carriage 52 so as to be parallel to the axis 55m of the drum 55, and a print solenoid 64 is rotatable on this shaft 64. It is freely supported and includes hammers 65, 65, etc., which are arranged between each wheel 4, 4 of the drum 55 and on the outside of the wheels 4, 4 located at both ends. . in this case,
Each hammer 65, 65... has a support plate 66 disposed parallel to the shaft 64, and a spring 67 attached between this support plate 66 and each hammer 65, 65... .67 . . . , the fork portion on the side extending between the wheels 4 is urged upward.

In this case, plunger 6 of print solenoid 63
The lifting plate 63b fixed to the 3m tip is 1Itl.
Record hammer 65.6! S... is adapted to drive a pair of hammers 65, 65 that sandwich the type head wheel 4 located above the platen 56 in a printable position.

By moving the drum 55 in the direction of arrow H-I under the above structure, the desired type head wheel 4 can be moved to a position where printing can be performed with respect to the platen 56, and thereby the selected type head can be moved to a position where printing is possible. Direct the desired type roller 11 on the wheel 4 toward the platen 56f and use the hammer 65.65.
It is now possible to push it out. In addition,
In the figure, reference numerals 70, 70, . . . indicate the carriage frame 51 and the carriage 5. ．． 2, 71 is an ink ribbon feeder, 72 is a ribbon feed motor, and 73 is an optical sensor that detects the U rotation position of the type head wheel 4.The printing mechanism configured as described above is , for example 128 on the rad wheel 4 to each type.
If the drum Ss is configured with a single drive wheel 4.4 for 16 sheets of type, the number of type rollers 1.11 for 2048 characters can be provided. become. Therefore, it is suitable for use as a printing mechanism for a printer for Chinese characters. Next, the operation of the above printing mechanism will be explained. First, the carriage is fed by a carriage motor 57 via a carriage string 58 to move the carriage frame 51 along the platen 56 in the direction of The movement and selection of the desired type head wheel of the drum 55 is started at the same time as the carriage feeding described above.
This is done by rotating the scratch shaft 59 using the shaft motor 60. The time required for the above-mentioned carriage feeding and wheel selection is determined by the number of characters to be fed and the desired position of the type head wheel 4, and usually one of them is longer. Type selection starts when both the carriage feeding and wheel selection described above are completed. The time required for this is 4 m@ on average when the rotational speed of the drum 55 is 900 rpm as in the case of the printing mechanism described above. Then, the print solenoid 63 is energized so that the hammer 65 pushes the type roller 11 toward the platen 56 when the type roller 11 passes through the printing area. This printing operation is also similar to the printing mechanism described above.

According to the above-described printing mechanism, printing is performed on the printing paper by the rolling motion of the type roller 11.
Since the time required for carriage feeding and wheel selection is approximately the same as that of the printing mechanism shown in FIGS. 1 to 3 described above, the present invention can be particularly applied to a type printer for Chinese characters to achieve a faster printing speed. Furthermore, since the printing operation is based on the transfer of the type roller, printing noise can be reduced. This can be reduced to 50 dB or less compared to the conventional 60 to 65 dB. Additionally, expensive servo motors and peripheral circuits for controlling them are not required for type selection, thus reducing costs. I can do it. Furthermore, since it can have a large number of printed characters and a variety of printed character patterns, it can also be applied to printing graphs, figures, and the like.

In the above embodiment, an example was explained in which one printer 65 was provided between each type head wheel 4.4 of the drum 55 as a printer mechanism, but FIG. Type head wheel as shown 4.4...
・In addition to providing two hammers 75° 75... at the junction, a pair of hammers 75 and 75 that hold the wheel 4 are fixed to each other, and a pair of hammers 7 that sandwich the desired wheel 4 are fixed to each other.
5.75 may be driven at the same time. Also, it is also possible to have all the nozzles interlocked so that they are driven at the same time.Furthermore, instead of the magnet ring 2S as the return mechanism for the type roller, As explained above, according to the printing mechanism of the movable type printer according to the present invention, printing can be carried out by rolling a single stroke onto the type. Because of this, it is possible to significantly reduce printing noise compared to conventional printing mechanisms in which type is stamped.

In addition, since the type selection and printing operations of the type head wheel are performed while the type head wheel is constantly rotating, there is no need for expensive servo motors or peripheral circuits for controlling them, thus reducing costs. It is possible to reduce the Further, since no intermittent operation is performed for character selection, the printing speed can be increased without being limited by mechanical rigidity, motor performance, etc.

Furthermore, by coaxially connecting a plurality of type head wheels to form a drum-shaped type head wheel assembly, a printing mechanism equipped with a sufficiently large number of type rollers can be arbitrarily designed. φ1, l' that can realize a printing mechanism suitable for type printers for kanji characters.

By applying this printing mechanism to a type printer for single characters, it has many effects such as being faster, cheaper, and less dusty than conventional type printers for kanji characters. It is something.

[Brief explanation of the drawing]

1 to 3 are schematic configuration diagrams showing one embodiment of the invention @l of the present invention, in which FIG. 1 is a plan view, and FIG.
The figure is a front view, Figure 3 is a side view, Figures 4 to SSa are diagrams for explaining the structure of the type head wheel, Figure 4 is a front view, and Figure 11115 is a
Figure 6 is a sectional view taken along the line Vl--Vl in Figure 4, Figure 7 is an enlarged view of the main part of Figure 4, and Figure 8 is a cross-sectional view taken along the line Vl--Vl in Figure 7. 9 is a block diagram showing an example of the control system of the printing mechanism shown in FIGS. 1 to 3; FIG. 10 is a diagram showing an example of the control method; FIG. 11 13 to 13 are diagrams for explaining the operation of the type roller of the type head wheel shown in FIGS. 4 to 8, and FIG. 11 is a front view of the main part, and FIG.
A cross-sectional view taken along J■-■-, FIG. 13 is a theory for explaining the action of the puffer ring as a roller positioning mechanism. [FIG. 814 is a schematic block diagram viewed from above, FIG. 15 is a schematic block diagram viewed 1kla from the side, and FIG. Figure 17 is a front view of the same, Figure 18 is a diagram for explaining the hammer mechanism of the printing mechanism shown in @ Figure 14 and Figure 1s, and Figure f419 is a diagram for explaining another embodiment of the hammer mechanism. FIG. 2...platen, 3...carriage,
4... Type head wheel, 5... Paper feed motor, Carriage motor,
9... Carriage string, 10...
・Wheel motor, 11... Type roller, ll
a... Engaging portion, 11b... Printing portion, 1
1C...Marriage, 12...Hammer mechanism, 1
3...No.1 meter, 14...Print solenoid, 19...Light sensor, 26...
・Wheel, 28... Hook ring (positioning mechanism), 29... Magnet ring (roller return mechanism), 30... Small hole, 30a...
...Marker, 50...Frame, soa, so
b...Rule, 51...Carriage frame, 52...Carriage, 53. m, 53b
・River... Carriage rail, 55... Drum (
Type head wheel assembly), 56...Platen, 57...Mark/carriage 7ji motor, 59/Mountain...Screer shaft, 6o...Shaft motor,
61...Drum motor, 63...Print solenoid, 64...Shaft, 65...
・Hammer, 67...Spring, 70...River...
Bearing Applicant: Hokushin Electric Manufacturing Co., Ltd. Figure 4 Figure 5 Figure 6

Claims (1)

[Scope of Claims] 1. A plurality of type rollers each having a cylindrical plate formed along the outer peripheral edge of a conical wheel are arranged so that the axes of the type rollers are directed in the thickness direction of the wheel, and A type head wheel disposed so as to be movable over a predetermined range in the radial direction of the wheel, and provided with a roller return mechanism on the wheel that urges each of the type rollers inward in the radial direction of the wheel. , a wheel rotation mechanism that rotates the type head wheel around its central axis, and a hammer ** that pushes out a desired type roller of the type head wheel toward the printing area;
A printing mechanism for a type printer, comprising a control device for driving and controlling the hammer mechanism, and wherein the type roller transfers printing to a printing area. 2. The printing mechanism of the type printer according to claim 1, wherein each of the type rollers is formed at least partially using a monomer, and the roller return mechanism is a magnet. 3. In a disk shape. A plurality of formed wheels are coaxially fixed at a certain distance from each other, and a plurality of cylindrical type rollers are attached along the outer peripheral edge of each of these wheels. Each wheel is arranged so that its axis is directed in the thickness direction of the wheel and is movable within a predetermined range in the radial direction of the wheel.
a type head wheel assembly provided with a roller return mechanism that urges the type rollers inward in the radial direction of the wheel; and a type head wheel assembly that is rotationally driven about its central axis. a wheel rotation mechanism, a moving mechanism that moves in the direction of the central axis of the type wheel east assembly and in a direction perpendicular to the central axis, and a desired type roller of the type head wheel assembly directed toward the printing area. It has a hammer mechanism that pushes out the
A printing mechanism of a type printer in which the type roller rolls on a printing area to print; 4. Each of the type rollers is formed at least in part using a magnetic material, and the roller return mechanism A printing mechanism of a movable type printer having a structure as claimed in claim 3, wherein is a magnet. 5. The hammer mechanism has a rotating shaft disposed along the axial direction of the type head wheel assembly and supported to follow the type head wheel assembly, and each intermediate portion is attached to the rotating shaft. A plurality of hammers are rotatably supported and extend between the respective wheels, and a pair of hammers sandwiching a desired wheel among the plurality of hammers are rotated. A printing mechanism for a type printer according to claim 3, comprising a XX motor movement mechanism.