JPS599357B2 - Typewriter error printing correction device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printing error correction device for a typewriter, and more specifically, to an eraser having a printing ribbon layer made of a normal ink ribbon or carbon ribbon and a pigment of the same color as printing paper adhered to it. In normal printing, the printing ribbon layer is used to print on the printing paper, and when erasing incorrectly printed characters, it is based on the press of the erase key. With the eraser ribbon layer raised to the printing point, the eraser type is struck, the pigment is applied over the erroneously printed characters to erase the characters, and the correct characters are placed on top of the erased area. The present invention relates to an error printing correction device that prints .

Such a printing error correction device uses a ribbon in which the upper half of the ribbon in the longitudinal direction is a printing ribbon layer and the lower half is an erasing ribbon layer.In normal printing operation, when the printing ribbon layer rises to the printing position, The ribbon vibrator in the ribbon mechanism comes into contact with the stopper, and characters are printed while the printing ribbon layer is temporarily held at the printing position. In addition, when erasing erroneously printed characters, operate the backspace mechanism to return the erroneously printed characters to the printing position, and then operate the erasing key to bring the erasing ribbon layer of the ribbon to the printing position. The eraser type is struck onto the printing paper through the eraser ribbon layer while the eraser is in a flat state.

At this time, the ribbon vibrator mechanism moves more than in the case of normal printing, and the stopper obstructs the operation of the ribbon vibrator mechanism. Therefore, the operation to remove the stopper before operating the erase key is necessary. became necessary. Therefore, when the erasing key is operated to erase erroneously printed characters regardless of the position of the stopper, the ribbon vibrator mechanism is actuated to raise the erasing ribbon layer of the ribbon to the printing position. It was requested. The object of the present invention is to make it possible to correct the above-mentioned printing errors by making slight improvements to the ribbon vibrator mechanism of an ordinary tie writer in order to meet such requirements.
The present invention aims to provide a misprint correction device with a simple structure.

Another object of the present invention is that when erasing erroneously printed characters and retyping the correct characters, only the backspace key/erase key and correct character key need to be operated, and the operation procedure is extremely simple. The aim is to provide equipment.

In order to achieve these objects, the present invention uses a two-layered ribbon consisting of a printing ribbon layer and an erasing ribbon layer, and a ribbon vibrator mechanism for moving the ribbon up and down between a rest position and a printing position using a pipe plate. It consists of a lever member, a lever member, etc., and a spring is applied between the two members so that the two members always rotate together.

The normal character keys are operatively connected to the lever member, and the erasing key is operatively connected to the vibrator member. Therefore, when the erasing key is operated and the vibrator member is rotated, even if the lever member that rotates integrally with the vibrator member engages with the stopper and its rotation is stopped, only the vibrator member is rotated. It rotates further against the spring and raises the erasing ribbon layer to the printing position, preventing erroneous printing by the erasing type. Erase the displayed characters. When the erase key is operated, the paper guide mechanism does not move forward in the character feed direction with respect to the printing mechanism due to the non-escape mechanism, so if the correct character key is operated after the erase key is operated, the misprint will be corrected. You can correct the text. An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a sectional view showing the printing mechanism of a typewriter embodying the present invention.

In the figure, a carriage rail 2 is fixed to the rear (left side in Fig. 1) of a side frame 1 placed on both the left and right sides of the typewriter, and a carriage 3 can be slid on the carriage rail 2 in the left-right direction of the typewriter. is supported by A platen 4 on which printing paper 5 is wound is rotatably supported on the carriage 3, and the carriage 3 is always urged to the left of the typewriter, that is, in the printing direction, by appropriate urging means. A rack 6 is fixed to the carriage 3 along its longitudinal direction.
A pinion 7 rotatably supported by the carriage rail 2 is engaged with the pinion 7.

A ratchet wheel 8, which is part of the space mechanism, is supported at the lower part of the shaft supporting the pinion 7 so as to rotate together with the pinion 7. Several control keys including a large number of character keys 9, an erase key 10, and a backspace key 11 are arranged on the front keyboard portion of the tie fly.

The printing mechanism of this tie writer will be explained below regarding the character keys 9. Between the two pairs of left and right side frames 1 is an intermediate frame 1 which together with the side frames 1 constitutes the machine frame of this typewriter.
2 and a front frame 13 are fixed to the side frame 1.

The support shaft 1 extends parallel to the middle frame 12 and passes through the side frame 1.
4 is fixed to the side frame 1. A rear end of a key lever 15 perpendicular to the support shaft is pivotally attached to the support shaft 14. The key lever 15 is connected to the middle frame 12 and the front frame 1 as shown in the figure.
It is configured to swing while being guided by slits 16 and 17 formed in both. The key lever 15 has the character key 9 fixed to its front end, and is always held at the original position shown by the solid line by a comb-tooth leaf spring 18 fixed to the front frame 13. The comb-shaped rear end portion of the leaf spring 18 is formed with an operating portion 19 that is bent downward. An interposer 20 is disposed below the key lever 15, and the rear end of the interposer 20 is pivotally supported by a bell crank 21, which will be described later, and the front end is connected to another slit 22 formed in the front frame 13. It has been inserted.

This interposer 20 has a stepped portion 23 formed at its upper portion that can engage with the actuating portion 19 of the leaf spring 18, and a protrusion 25 that can engage with the teeth of the drive shaft 24 at its lower portion. The drive shaft 24 is supported between the side frames 1 and is always rotated counterclockwise in the figure at a constant speed by a motor (not shown). A spring 26 is hung between the interposer 20 and the front frame 13, and this spring 26
The protrusion 25 of the interposer 20 and the drive shaft 24 are held so as not to engage with each other. and character key 9
When the interposer 20 is pushed down against the leaf spring 18 from the original position shown by the solid line in the figure to the depressed position shown by the two-dot chain line, the interposer 20 is pushed down via the actuating portion 19 of the leaf spring 18, The protrusion 25 of the interposer 20 is the drive shaft 2
4, the interposer 20 is driven by the drive shaft 24 and thrown backward against the spring 26. Below the support shaft 14, another support shaft 27 parallel to the support shaft 14 is fixed between the left and right side frames 1.

A bell crank 21 is rotatably supported on this support shaft 27 while being inserted into a slit 28 formed in the middle frame 12 . This bell crank 21 is pivotally connected to the interposer 20 at the lower part, and the interposer 20
At the same time, it is urged counterclockwise in the figure by the spring 26, and the front end 29 is normally held in a position where it engages with the lower edge of the middle frame 12. A front end of a type bar wire 30 is pivotally attached to an arm 21a of the bell crank 21 that extends obliquely upward.

The rear end of the type bar wire 30 is connected to the lower end of the type bar 31. This type bar 31 has its base end 31
It is pivotally supported by a segment wire 33 fixed to a type bar segment 32 at point a, and a character type 34 corresponding to the character key 9 is fixed to its tip. When the character key 9 is pressed down and the interposer 20 moves backward as described above and the bell crank 21 rotates clockwise, the type bar 31 rotates counterclockwise via the type bar wire 30. The characters 34 are moved to print at printing points 35 on the platen 4 as shown by two-dot chain lines.

At this time, the base end 31a of the type bar 31 moves the space actuator 36 disposed below the type bar segment 32 rearward. This spacing operator 36 is operatively connected to a spacing mechanism, which feeds the carriage 3 carrying the printing paper 5 by a base distance in the printing direction. After the printing operation is completed, the spring 26 and the leaf spring 18 return the respective members to their original positions indicated by solid lines in the figure.

The printing mechanism for erasing key 10 is almost the same as the printing mechanism for character key 9 described above.

The differences between the two are as follows. That is, the front end of a wire 38 for operating a ribbon mechanism is connected to the middle part of the arm 37a extending obliquely upward of the bell crank 37 operatively connected to the erasing key 10. As shown in the figure, the base end 39a of the type bar 39 has a notch at its upper edge, so that even if the type bar 39 is activated based on pressing the erasing key 10, the space actuator 36 is not activated. , Therefore, the space mechanism has become a so-called non-space mechanism in which it is not activated.
Further, as shown in the figure, the erasing type 40 has a mesh-like unevenness formed on its surface so that it can cover the entire surface of the printing point 35. FIG. 2 is a sectional view of the main part of the ribbon mechanism of this typewriter, with the side frame 1 omitted.

As shown in FIGS. 1 and 2, a protrusion 41 is formed at the rear end of the interposer 20. As shown in FIGS.

These protrusions 41 are formed on all the interposers 20 (only one is shown in Figures 1 and 2), which are arranged in parallel in the left and right direction of the typewriter.
A horizontal plate portion 42a of a universal bar 42 is arranged at the rear of the universal bar 1 so as to be able to come into contact with the horizontal plate portion 42a. Leg portions 42b are bent at both left and right ends of the horizontal plate portion 42a, and the universal bar 42 is attached to a shaft 43 fixed to the side frame.
It is rotatably supported by a spring 44 and always biased clockwise in FIG. 2 by a spring 44. Thereby, the interposer 20 and the universal bar 42 are always interlocked. The right leg 42b extends upward, and an operating groove 45 is formed in its upper part. Reference numeral 46 designates a swinging lever that is shaped like an inverted U when viewed from the front of the typewriter, and a roller 47 that fits into the operating groove 45 is supported on one arm of the swinging lever.

When the printing mechanism is activated and the interposer 20 moves rearward, this swing lever 46 is rotated by the universal lever 46.
2 in the clockwise direction in FIG. The upper end of a ribbon actuating wire 48 is pivotally attached to the other arm of the swing lever 46 . A ribbon operating link 50 is rotatably supported on the side frame 1 via a short shaft 49 fixed to the side frame.

A substantially T-shaped opening 52 is formed in the first arm 51 of the operating link 50 extending downward. After passing through the opening 52, the lower end of the ribbon actuating wire 48 is bent back. A spring 54 is applied between the operating link 50 and a pin 53 fixed on the side frame 1 to bias the operating link 50 counterclockwise in FIG.
It is held in its original position in contact with a stop pin 55 on the side frame 1. A second arm 56 extending rearward of the operating link 50 has a first
The lower end of a first wire 57 serving as a connecting member is pivotally connected. A collar change lever 59 is rotatably supported on a short shaft 58 fixed on the side frame 1 at the front of the typewriter.

Three notched recesses 60 are formed in the lower part of the collar change lever 59, and cooperate with a leaf spring 61 fixed to the side frame 1 to hold the lever 59 in one of three positions. do. The front end of a lever 62 is swingably connected to the base of the operating knob extending upward from the lever 59. A pin 63 is fixed on the lever at approximately the center of the lever 62, and a stopper 64 is formed at the rear end. 65 is a switching lever pivotally supported on a shaft 66 fixed to the side frame 1.

An elongated hole 67 is formed in the arm extending upward of the switching lever 65, and the elongated hole 67 and the pin 63 are arranged so as to fit into each other. An actuating arm 65a extends from the base of the switching lever 65 along the ribbon actuating wire 48,
A bent portion 65b is formed at the tip of the operating arm 65a, which is bent at a right angle toward the inside of the typewriter.
An opening is formed in this bent portion 65b, and the ribbon actuating wire 48 is arranged to pass through the opening. A second ribbon actuating link 68 is provided on the short axis 49 on the side frame 1 in parallel with the ribbon actuating link 50.
is rotatably supported.

A horizontally elongated hole 69 is formed in one arm of this link 68, and after the lower end of the wire 38, whose upper end is connected to the erasing bell crank 37, is inserted into this elongated hole 69, the wire 38 is folded. It is bent so that it can be returned. The lower end of a second wire 70 serving as a second connecting member is pivotally connected to the rearwardly extending arm of the second ribbon operating link 68. 2nd, 3rd
In the figure, 71 is a horizontal support stand that is a part of the machine frame fixed to the side frame 1.

This support stand 71 is integrally fixed with a support plate 72 having an upright portion 72a that stands up diagonally rearward.
A pair of bent pieces 73, 74 are formed at the top and bottom of the left end of 2a, and these bent pieces 73, 7 are bent toward the front.
4 is fitted with a cushioning material. A substantially flat ribbon vibrator 75 extending parallel to the platen 4 is rotatably supported at the upper part of the upright portion 72a. A ribbon guide portion 76 having a substantially U-shape surrounding the print point 35 is formed at the left end portion of the arm portion 75a extending leftward of the ribbon vibrator 75. In addition, the arm portion 75a and the support plate 72
A tension spring 77 is applied between the arm portion 7 and the ribbon vibrator 75, which constantly biases the ribbon vibrator 75 in the counterclockwise direction in FIG.
The lower edge of 5a is held in the rest position where it is engaged with the lower bent piece 74. A pin 78 is fixed to the arm extending to the right of the ribbon vibrator 75.
The upper end of the second wire 70 is pivotally attached to the upper end of the second wire 70 .

A first lever 79 and a second lever 80 constituting a lever member are pivotally mounted between the support point of the ribbon vibrator 75 and the pin 78. These levers 7
9 and 80 are parallel to the ribola pipe plate 75 and have a substantially flat plate shape. The first lever 79 has a bent portion 81 whose upper end is bent toward the front of the typewriter.
and a drooping portion 82 that hangs down substantially downward from the right end. A first spring 83 is hung between the right end of the ribbon vibrator 75 and the upper left of the first lever 79, and the upper right edge of the ribbon vibrator 75 is connected to the lower surface of the bent portion 81 of the first lever 79. are engaged with each other, and are urged to always move in unison.

Further, a second spring 84 having a weaker spring force than the first spring 83 is hung between the lower part of the second lever 80 and the hanging part 82 of the first lever 79. The upper edge of the second lever 80 engages with the bent portion 81 of the first lever 79, and the two levers 79 and 80 are biased so that they always move in unison. That is, the ribbon vibrator 75, the first lever 79, and the second lever 80 are always urged to move integrally by the action of the first and second springs 83, 84.

A hook-shaped upper end of the first wire 57 is hung in a circular hole 85 formed at the right end of the second lever 80.

The lower edge of the hanging portion 82 of the first lever 79 engages with the stopper 64 on the lever 62 when the collar change lever 59 is held in the most clockwise rotated position in FIG. Arranged to get. Further, the ribbon 86 inserted into the ribbon guide portion 76 of the ribbon pipe plate 75 has a printing ribbon layer 87 whose upper half in the longitudinal direction is made of a normal ink ribbon for printing or a carbon ribbon.
The lower half consists of an eraser ribbon layer 88 on the print paper 5 side of a base made of a synthetic resin material, to which a pigment of the same color as the print paper 5 is adhered.

This ribbon 86 is fed from one longitudinal direction to the other by a ribbon feeding mechanism (not shown) so as to cross the printing point 35 for printing operation. Next, the correcting operation of the typewriter error printing correction apparatus will be explained.

During normal use of the typewriter, the printing ribbon layer 87 of the ribbon 86 is used to print, so the color change lever 59 is held in the position shown by the solid line in FIG.
The stopper 64 on the second lever is within the movement path of the first lever 79. In a normal printing operation by operating the character key 9, the character type 34 on the type bar 31 is driven toward the printing point 35 as described above based on the depression of the character key 9.

At this time, the interposer 20 includes a universal bar 42,
The ribbon actuation link 50 is rotated clockwise via the swing lever 46 and the ribbon actuation wire 48, and the first wire 57 is pulled down. Along with this, the second lever 8
0, the first lever 79 and the ribbon vibrator 75 are integrally rotated clockwise in FIG. Raise the direction. As these levers rotate, the first lever 79 and the ribbon vibrator 75 are stopped at a position where the lower end of the hanging portion 82 of the first lever 79 engages with the stopper 64.

At this time, the ribbon 86 held by the ribbon guide section 76 is set so that its printing ribbon layer 87 rises to the printing position. In this manner, with the printing ribbon layer 87 temporarily facing the printing position, the characters 34 are printed at the printing points 35 through the printing ribbon layer, and the characters are printed on the printing paper 5. Here, after the lower end of the hanging part 82 and the stopper 64 are engaged, when the first wire 57 is further moved down, only the second spring 84, which has a weaker spring force than the first spring 83, is stretched. Only the lever 80 of 2 is the ribbon vibrator 7.
Rotate clockwise on 5. While repeating such printing operations, the operator may, for example, press "
If the operator accidentally prints "ABD" while trying to print "ABC", the operator must first operate the backspace key 11 to move the incorrectly printed letter "D" to the print position (at the position where the type 34 hits the platen 4). (indicated by a dashed rectangle in FIG. 5).

Next, when the erasing key 10 is depressed, the erasing type 40 is driven toward the printing point 35 as described above.

At the same time, a bell crank 37 and a wire 38 for erasing
and the second wire 70 is pulled downwardly through the second ribbon actuation link 68. As a result, the ribbon vibrader 75 is rotated clockwise in FIG. 4, and the ribbon guide portion 76 is raised. Printing ribbon layer 8
7 rises to the printing position, the lower end of the hanging portion 82 of the first lever 79 engages with the stopper 64;
Since the wire 70 moves further down, the ribbon vibrator 75 is further rotated against the first spring 83. The ribbon vibrator 75 is then stopped at a position where the upper edge of the arm portion 75a of the ribbon vibrator 75 engages with the bent piece 73 on the upper side of the support plate 72. At this time, the eraser ribbon layer 88
has risen to the printing position. Note that at this time, the second lever 80 moves integrally with the first lever 79, and the second spring 84 does not change. When the erasing type 40 prints a printing point through the erasing ribbon layer 88 while the erasing ribbon layer is temporarily facing the printing position μ, the pigment adhered to the erasing ribbon layer 88 is removed. It is applied onto the erroneously printed character ("D" in FIG. 5) on the printing paper 5, and the erroneously printed character is erased.

At this time, the carriage 3 is not moved in the direction of the print line due to the action of the non-space mechanism. The desired print line can then be obtained by pressing the correct letter key ("C" in FIG. 5).

As described in detail above, in order to correct a misprinted character, the misprinting correction device according to the present invention only requires key operations in the order of backspace key, erasing key, and correct character key. The procedure is extremely simple.

Further, the structure is simple because a lever member consisting of the first and second levers is provided on the ribbon vibrator, and the erasing key and the ribbon vibrator are operatively connected. Moreover, the invention can be easily applied to a conventional typewriter by making a few changes. Furthermore, since the lever member and the ribbon vibrator rotate in substantially the same plane, this device can be made extremely compact.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of the main part showing the printing mechanism of a typewriter embodying the present invention, Fig. 2 is a cross-sectional view of the main part showing the ribbon mechanism, and Fig. 3 is a cross-sectional view of the main part showing other parts of the ribbon mechanism. ,
FIG. 4 is a cross-sectional view of a main part of the telephone half plate mechanism, and FIG. 5 is an explanatory diagram showing the order of correcting erroneous printing. In the figure, 9 is a character key, 10 is an erase key, 34 is a character type, 35d is a printing point, 40 is an eraser type, 57 is a first wiper, 64 is a stopper, 70 is a second wire, 75 is a bottom half plate, 79 is a first lever, 80 is a semi-secondary lever, 83 is a first spring, 84 is a second spring, 86 is a ribbon, 87 is a printing ribbon layer, and 88 is an erasing ribbon layer. It is.

Claims (1)

[Claims] 1. A printing mechanism that includes erasing type that is operated based on the operation of an erasing key in addition to normal character type, a paper support mechanism, and a normal character key between the two mechanisms. a space mechanism for moving the two mechanisms relative to each other in steps in the printing direction to form a print line when operated; and a space mechanism for moving the two mechanisms relatively in the opposite direction to the printing direction based on the operation of the backspace key. a backspace mechanism for moving the spacer in steps in the direction; a non-space mechanism for not activating the spacer mechanism when the erasing key is operated; and a ribbon mechanism that temporarily brings one of the ribbon layers from a rest position to a printing position, the ribbon mechanism having a ribbon guide section that guides the ribbon. A vibrator member pivotally attached to the machine frame for moving up and down between the rest position and the printing position, a lever member pivoted on the vibrator member, and the lever member and the vibrator member are usually rotated integrally. a spring for operatively connecting; a first connecting member having one end connected to the lever member and the other end operatively connected to the character key; and one end connected to the vibrator member; a second connecting member whose other end is operatively connected to the erasing key; and a lever member which is rotated together with the vibrator member via the first connecting member when the character key is operated. and a stopper for holding the ribbon guide portion of the vibrator member at the printing position so that the printing ribbon layer faces the printing position, and when the erasing key is operated, the vibrator member moves to the second connection. When the lever member is rotated through the ribbon member and the lever member engages with the stopper, only the vibrator member further rotates against the spring so that the eraser ribbon layer of the ribbon faces the printing position. A typewriter misprint correction device featuring: 2. The lever member includes a first lever pivotally mounted on the vibrator member and engageable with the stopper, and a first lever pivotally mounted on the first lever and connected to one end of the first connecting member. the spring is applied between the vibrator member and the first lever, and a spring force from the spring is applied between the first lever and the second lever. A weak second spring is applied, and the first and second levers are connected so as to always rotate integrally with the vibrator member, and the second lever is rotated based on the operation of the letter key. when the first lever engages with the stopper, the second lever is engaged with the second lever.
2. The misprint correction device for a typewriter according to claim 1, wherein the device is configured to be able to further rotate against a spring.