JPS6319258A - Recording apparatus - Google Patents

Abstract

PURPOSE:To enhance operability, by a method wherein the type wheel information of a store means is compared with the content of a memory means after a type wheel is moved to a predetermined recording position and, when both of them do not coincide, the replacement of the type wheel is performed. CONSTITUTION:The platen 7 of a housing stand 101 for selecting wheel cartridges 100 is moved in a forward-and-rearward direction by the rotation of a motor 105 and stops at the place of the wheel cartridge containing a desired daisy wheel 6 among five wheel cartridges 100 in a magazine 8 by the control of the motor 105. A wheel motor part stands by at a position gone away from the platen 7 during a time when each cartridge 100 is present in the magazine 8 and, when the cartridge 100 is raised by an up-and-down movable lever 106 to reach the height of a motor shaft 112, said motor part begins to move in a direction approaching the platen 7 and engaged with the hole part at the center of the wheel to mount the type wheel 6 to a wheel motor 110. By this method, the type wheel can be moved to a predetermined recording position.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an impact type recording device, and more particularly to a recording device that is equipped with a plurality of type wheels and records documents while changing the type wheels automatically.

[Conventional technology] One f! compared to conventional technology. An impact type printing device equipped with a similar type wheel stores characters to be printed across multiple lines, and even if characters were printed several lines ago, the print head is returned to the position of the character used for printing. By selecting the same printed characters and stamping them through an erasing ribbon, the printed characters are stripped off and erased. On the other hand, there is a printing device that is equipped with a plurality of types of type wheels or type groups and prints while automatically exchanging these type wheels as necessary. However, when printing is erased using the method described above in such a printing device, there are problems as described below.

[Problems to be solved by the invention: In a multi-disc type printing device equipped with a plurality of type wheels, when erasing a print, not only the type of character but also the same type wheel as the type wheel used for printing is erased. The characters cannot be completely erased unless the characters are erased using the . However, by doing this, when the type wheel is returned to the original printing position, the type of type may be different, which is inconvenient for operation. Furthermore, when returning to the original printing position, there is a problem in that it takes too much time and effort to return to the original printing position by using the space key or backspace key, for example.

The present invention has been made in view of the above-mentioned conventional example, and when recording is performed using a plurality of type wheels, it is possible to automatically change the type wheels according to the recording position, and,
To provide a recording device capable of easily returning a type wheel to its original position.

[Means for Solving the Problems] In order to achieve the above object, the recording device of the present invention has the following configuration. That is, a recording device that stores a plurality of type wheels, selects and mounts a desired type wheel, and records on a recording medium,
an input means for manually inputting a type wheel replacement instruction and document information; an exchanging means for exchanging the type wheel in response to the exchange instruction; a first storage means for storing the document information and wheel information at the time of exchange; , a second storage means for storing type wheel information mounted thereon; a moving means for moving the type wheel of the type wheel to a predetermined recording position on the recording medium; storage means for reading out and storing wheel information; and means for comparing the wheel information in the storage means and the contents of the second storage means after the completion of movement and operating the exchange means when they do not match. I can do it.

[Function] In the above configuration, the moving means can move the type wheel to a predetermined recording position, for example, to the next recording position, and after the movement is completed, the wheel information in the storage means is compared with the contents of the second storage means. and when they do not match, the changing means is activated to change the type wheel.

[Embodiments] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[Configuration diagram of electronic typewriter (FIGS. 1 and 2)] FIG. 1 is a diagram showing the main hardware configuration of a multi-digital electronic typewriter.

In the figure, 1 is a keyboard for inputting desired print characters and various functions for functioning as an electronic typewriter. A display 2 is, for example, a two-line liquid crystal display capable of displaying 40 characters per line. This display 2 is used to display characters input from the keyboard 1 or guidance and messages to the operator in a line-by-line printing mode or the like. Reference numeral 3 denotes a control unit that controls the input of characters and functions from the keyboard 1 and their display on the display 2, or the printing operation performed by driving the carriage 4 and hammer 5, which will be described later.

The carriage 4 is equipped with a print hammer 5, a magazine 8 that can store a plurality of wheels 6, a type wheel 6, and other miscellaneous parts, and is moved horizontally parallel to the platen 7 in response to manual keystrokes from the keyboard 1 and printing operations. Moving. The platen 7 has a surface made of a rubber material, and is in close contact with the printing paper to feed the paper in a direction perpendicular to the moving direction of the carriage. Reference numeral 6 denotes a disc-shaped type wheel (digi wheel), with a plurality of spokes arranged radially from the center of the disc, each of which has a type attached to its tip. A printing hammer 5 strikes the type wheel 6 in order to print on paper according to instructions from the control unit 3. The magazine 8 stores a plurality of type wheels 6. The installed type wheel 6 can be returned to the magazine 8 1 and a new type wheel can be pulled up from the magazine 8 and replaced.

In the above configuration, when printing is instructed from the keyboard 1, the control unit 3 rotates the type wheel 6 to select the desired print character, and an ink ribbon (not shown) is applied to the paper surface on the platen 7. ), printing can be performed by the impact of the printing hammer 5. When erasing printed characters, move the carriage 4 to the printing position, select the printed characters to be erased, and hit the printed characters with the printing hammer 5 through an erasing ribbon (not shown) to erase the printed characters. be done.

FIG. 2 is a diagram showing the key arrangement of the keyboard 1 of this embodiment.

A portion 10 for inputting numbers, alphabets, and symbols and portions 11 and 12 for instructing functions are appropriately arranged. 20 is the backspace key, carriage 4
to the left.

The key 21 is a reverse paper feed key that moves the print paper back one line and positions the print head back to the previous line. The key 22 is a normal line feed key that feeds paper by one line. 23 is deleted (Delete
) key is used to remove and erase characters already printed on the paper. In this embodiment, as will be described later, it is possible to erase not only the line in which the print head is currently located, but also any character in the previous line or the line before the previous line by using the key 21 or the like.

The key 24 is a key for returning the print head to the previous line or the line before the previous line using the key 21 or the like, and then moving the print head to the next position of the last character being printed. With this key,
Since the print head can be easily returned to its original position after the print disappears, the efficiency of document input can be improved.

[Explanation on replacing the wheel cartridge (Fig. 3)
] FIG. 3 is a cross-sectional view of the carriage 4 and explains the mechanism for replacing the wheel cartridge 100 that houses the type wheel.

Inside the wheel cartridge 100 is a type wheel 6.
Five wheel cartridges 100 themselves are stored in the magazine 8 in parallel. The magazine 8 can be stored by sliding it into the storage stand 101 from the side. The operation of selecting a wheel by rotating this magazine 8 nine times will be described below.

A storage stand shaft 102 passes through a part of the bottom of the storage stand 101. Further, this storage stand 101 is provided with a rack 103. The rack 103 and a gear 104 are engaged with each other, and the gear 104 is rotated by a motor 105. Therefore, the movement of the platen of the storage stand 101 in the back and forth direction (in the direction of arrow C) for selecting the wheel cartridge 100 is performed by the rotation of the motor 105. In this way, the motor 10
5, the user can stop at the wheel cartridge that stores the desired diegewheel 6 among the five type wheel cartridges 100 in the magazine 8. ``While the magazine 8 is moving in the longitudinal direction of the platen 7 (in the direction of arrow C), the vertical lever 106 continues to maintain its normal position as shown in FIG. 3. A rack 107 is cut at the tip of the vertical lever 106 opposite to the portion connected to the magazine 8, and is engaged with a gear 108. This gear 108
is rotated by a motor 109.

The gear 108 is rotated counterclockwise by the rotation of the motor 109, and the rack 107 meshing with the gear 108 causes the vertical lever 106 to rotate clockwise around 111 and lift upward.

The entire wheel motor section, which includes only a few components including the wheel motor 110 and the shaft 112 of the motor to which the bullet plate and disk section are attached, performs reciprocating motion in the direction of the arrow. The vertical movement of the wheel cartridge 100 and the movement of this wheel motor unit are linked, and while the wheel cartridge 100 is in the magazine 8, the wheel motor unit waits at a position away from the platen 7, and the wheel cartridge 100 When it is lifted up by the vertical lever 106 and reaches the height of the wheel motor shaft 112, it begins to move in the direction approaching the platen 7, and finally fits into the hole in the center of the wheel, and the wheel motor 110 transfers the print. Wheel 6 is attached.

[Description of Control Unit and Document Data (Figs. 4 to 6) Fig. 4 is a block diagram for explaining the functions of the control unit 3.

In the figure, 40 is a buffer that stores characters, symbols, codes, etc. printed over multiple lines. 41 is an address pointer which specifies the address of the buffer 40. 42 is ROM
The CPU performs calculations and the like in accordance with the control program stored in the CPU 43 to control the entire device. Reference numeral 44 denotes a ready signal which becomes "L" level only when the address pointer 41 is updated and inhibits the output of the AND gate 49.

The register 45 stores type wheel information corresponding to the print information in the buffer 40 pointed to by the address pointer 41. The register 46 is a register that shifts in and stores the information of the type wheel in the registers 4 and 5 when printing is performed or when the key 24 is pressed.

A comparator 47 compares the values of the registers 45 and 46, and outputs a mismatch signal 48 to an AND gate 49 when they do not match. The signal 50 is a signal that is turned on when the delete key 23 is pressed, and the signal 51 is a signal that is turned on when the key 24 is pressed.When the ready signal 44 is on, when any of these keys is pressed, the mismatch signal 48 is output. When the output signal 53 of the AND gate 49 is on, the output signal 53 of the AND gate 49 is turned on. This causes the CPU 42 to recognize that the wheel needs to be replaced, and activates the wheel replacement section 52 shown in FIG. 3 to replace the type wheel.

FIG. 5 is a diagram showing an example of document information, which consists of four lines of text, with only the third line being printed by a different type wheel.

FIG. 6 is a diagram showing an example in which the document information shown in FIG. 5 is stored in the buffer 4o.

60 to 63 are row data corresponding to each of the first to fourth rows, and addresses are stored consecutively in the buffer 4o. The character code input from keyboard 1 is stored as an ASCII code, and at the end of each line, the EOL code 64 (end of line%) is entered by pressing the return key.
Hexadecimal: "2F" in I-code) is stored.

65 and 66 each represent the number of the type wheel 6 as a code, indicating that the type wheel was changed to the wheel number 2 by the wheel number 1 at the start of the third line. It can also be seen that at the start of the fourth row, the wheel numbered 2 has been changed to the wheel numbered 1. 6
7 is the EO stored at the final end of the effective range of the buffer 40
This is a B code (end of line “2E”).

When the print head is currently at the EOB 67 position, if the backspace key 2o is pressed, the print head moves eight times to the "," printing position. Next, if you continue to press the backspace key 20, the print head will move further and further to the left until it reaches "d".
'' and presses the backspace key 20 again, the print head moves to the position of the previously printed character "e" in the previous line.

At this time, the DK2 (02) code is in the register 45.
A DKI (01) code is stored in the register 46,
A mismatch signal 48 is output from the comparison circuit 47. If the operator presses the delete key 23 in an attempt to delete the letter "e" at this point, the ready signal 44 is already in the active state, so the output 53 of the AND gate 49
turns on. Thereby, the CPU 42 instructs the wheel replacement section 52 to replace the type wheel. After this, select the type on the type wheel,
The erasing ribbon is placed opposite the printing surface, and the printing hammer 5 is driven to peel off and erase the printed characters. Note that the wheel information of the register 45 is stored in the register 46 even when printing is erased by this hammer drive.

[Description of Deletion Process (FIG. 7)] FIG. 7 is a flowchart showing a printed character deletion operation that is started by pressing the delete key 23. The tree program is stored in the ROM 43 of the control unit 3.

First, in step S1, it is determined by the signal 53 whether or not the type wheel needs to be replaced. When replacement is necessary, the process proceeds to step S2, and the wheel replacement section 5 shown in FIG.
2 to replace the type wheel 6. On the other hand, if there is no need to replace the type wheel, the process advances to step S3. In step S3, the type wheel is rotated to select the corresponding type, and in step S4, the erasing ribbon is lifted up to the type portion of the type wheel 6. In step S5, the printing hammer is driven to erase the printed characters, and the contents of the register 45 are shifted into the register 46.

[Key 24 Pressing Process (Figure 8)] Figure 8 is a flowchart of the process of returning the print head position to its original position by pressing the key 24.
It is stored in OM43. This program is started by pressing the key 24, and first, in step S10, the address pointer 41 is used to scan in the direction of the final printing position in order to check the contents of the buffer 40. Subsequently, when the EOL code 64 is detected in step 311, the process proceeds to step S12, and after feeding the paper one line in the forward direction, the process returns to step SIO.

If the EOL code is not 64, the process advances to step S13 to check whether it is wheel information. If it is wheel information, the process advances to step S14, and the wheel information just read out is set in the register 45.

In step S15, it is checked whether the EOB code is 67 or not.

If the EOB code is not 67, the process returns to step S10. E
When the OB code is 67, the process advances to step S16 and the EOB
Move the print head to the column position where code 67 is present. In step S17, the values in the register 45 and the register 46 are compared, and if they do not match, the process proceeds to step 318, where a replacement instruction is output to the wheel replacement section 52 to replace the wheel, and the wheel type information in the register 45 is stored in the register 46. shift in.

In this way, when the print head is reversed according to the contents of the buffer, instead of replacing the type wheel every time the type information of the type wheel appears, the type wheel can be replaced at the point when the wheel needs to be replaced, such as when erasing. exchange. Also, when returning the print head to its final printing position, the type wheel is replaced only when necessary.

Specifically, using the example of FIG. 6, when the print head is currently equipped with the type wheel numbered 1 and is in the "T" position of row 60, pressing the key 24 will cause the print head to move to the position next to the final print position of the document. The print head moves to the position corresponding to the EOB code 67. At this time, the wheel number at the final printing position is 1, and the registers 45 and 46 store the same information, so the comparator 47 does not output the mismatch number 48. In this way, even if the wheel type information is changed while the buffer 40 is being scanned, the key 24 and deletion key processing can be carried out efficiently because the type wheel is not changed each time.

In addition to the backspace key 20, there is also a paper feed key 2.
Even if the print head is positioned in the front row using the
By scanning the buffer 40 in a similar manner,
Similarly, characters can be erased. It is also possible to use the key 22 and the space bar instead of the key 24 to position the print head in the final print position, and to replace the type wheel in the same manner as described above.

As explained above, according to this embodiment, even when printing is performed by replacing the type wheel, the already printed characters can be accurately erased.

Furthermore, when the print head is positioned at the final print position,
This has the effect of allowing smooth typing by reinstalling it on the appropriate type wheel as needed.

[Effects of the Invention] As explained above, according to the present invention, the type wheel can be moved six times to a predetermined recording position, and when recording is performed using a plurality of type wheels, the type wheel can be moved in accordance with the recording position. This has the advantage that the type wheel can be replaced automatically.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a typewriter according to an embodiment of the present invention, Fig. 2 is a diagram showing an example of a keyboard, Fig. 3 is a diagram showing the configuration of a wheel exchange section, and Fig. 4 is a type of typewriter according to the present embodiment. A diagram for explaining the control section of the writer, Figure 5 is a diagram showing an example of documents and information, Figure 6 is a diagram showing the contents of a buffer storing the document information in Figure 5, and Figure 7 is a diagram showing an example of document information. FIG. 8 is a flowchart of the operation at the time of erasing. FIG. 8 is a flowchart of the print head return process. In the figure, 1...Keyboard, 2...Display, 3
...control unit, 4...carriage, 5...hammer,
6... Type wheel, 7... Platen, 8... Magazine, 20... Backspace key, 23... F
ll except jt--140...Buffer, 41...Address pointer, 42...CPU143...ROM,
44...Ready signal, 45.46...Register, 4
7... Comparator, 48... Mismatch signal, 49...-A
ND gate, 52---Wheel replacement section. Patent applicant Canon Co., Ltd. Figure 1 Figure 5 Figure 7

Claims (2)

[Claims] (1) A recording device that stores a plurality of type wheels, selects and mounts a desired type wheel, and records on a recording medium, the input means for inputting a type wheel replacement instruction and document information; an exchange means for exchanging the type wheel in response to a replacement instruction; a first storage means for storing the document information and wheel information at the time of exchange; and a second storage means for storing information on the attached type wheel. , a moving means for moving the type position of the type wheel to a predetermined recording position on the recording medium, a storage means for reading and storing the wheel information of the document information in response to the moving means, and a storage means for reading and storing the wheel information of the document information after the movement is completed. A recording device comprising means for comparing the wheel information of the means and the contents of the second storage means and operating the exchanging means when they do not match. (2) The recording apparatus according to claim 1, wherein the moving means moves the character position of the character wheel to a position where the next recording operation is to be performed.