JPS6378783A - Carrier apparatus of printer - Google Patents

Abstract

PURPOSE:To perform retraction operation automatically and simply, by mounting a ribbon feed mechanism for transferring a ribbon by the rotation transmitted from one of the first and second clutches and a retraction mechanism for retracting one of a printing head and a ribbon cassette by the rotation transmitted from the other clutch. CONSTITUTION:The first one-way clutch 100 transmitting rotation to a transmission vertical shaft 99 only at the time of forward rotation is connected to the feed gear 97 meshed with the motor gear 96 of a ribbon feed motor 95 and the second one-way clutch 102 transmitting rotation to a bevel gear 101 only at the time of reverse rotation is connected to a release gear 98. When the ribbon feed motor 95 rotates forward, the ink ribbon in a ribbon cassette 90 is transferred and, when said motor 95 rotates reversely, the rotation of the bevel gear 101 is transmitted to a transmission vertical shaft 110 by the bevel gear 109 meshing with said gear 101 and a printing head 88 is retracted to a predetermined retraction position. Therefore, by the reverse rotation of the ribbon feed motor, a printing head or the ribbon cassette or both of them can be retracted automatically.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a carrier device in a printing machine such as a printer or a typewriter.

"Prior Art and its Problems" In the past, in order to easily replace the print head, the frame was manually rotatable, and in order to easily replace the ribbon cassette, the frame was made to be rotatable manually. There are some that allow frames to be retracted manually, but none that allow them to be retracted automatically. Therefore, each time you want to arbitrarily decide the print start position on the platen or set the print formant, you have to manually move the print head back and then move the ribbon cassette back manually. It was very troublesome.

An object of the present invention is to automatically and easily perform such a retracting operation using a ribbon feeding motor.

"Means for solving the problem" In order to achieve this object, the carrier device of the present invention includes a motor that can rotate in forward and reverse directions, a first clutch that transmits the rotation only when the motor rotates in the forward direction, a second clutch that transmits rotation only when the rotation is reversed; a ribbon feed mechanism that is driven by the rotation transmitted from one of the first and second clutches to transport the ribbon in the ribbon cassette; and a retracting mechanism that is driven by the rotation of the printer and retracts at least one of the print head or the ribbon cassette from the operating position.

"Function" According to the present invention, when the motor rotates forward, for example, the rotation is transmitted to the ribbon feed mechanism via one of the clutches, and the ribbon is transferred. Further, when the motor rotates in reverse, its rotation is transmitted to the retraction mechanism via the other clutch, and the print head or cassette frame is retracted.

``Example'' Hereinafter, an illustrated example in which the present invention is applied to a printing machine suitable for printing on slips and the like that particularly require accuracy of printing position will be described.

As shown in FIG. 1, this printing machine consists of a printing machine main body 1 and a console device 3 connected to the main body 1 via a cable 2. As shown in FIG. The console device 3 is provided with a keyboard 3a, a liquid crystal display device 4 is attached so that its tilt can be adjusted, and a floppy disk drive 5 is built-in.

The printing machine main body 1 is provided with paper feed/discharge lowers 8 on the top surface of the case 6 and the lower edge of the front surface, respectively, and paper 9 such as slips can be fed from either of these paper feed/discharge lowers 8. Can output paper or paper. A substantially horizontal paper guide table 10 extends to the paper feed/discharge port 8 on the front surface, and a paper guide stand 11 for guiding paper 9 to the paper feed/discharge port 8 is provided on the rear side of the paper feed/discharge lower portion on the top surface. It is attached at a slight angle and is removable. A portion of the paper guide stand 11 is cut diagonally so that it is easy to hold the paper 9 along it. In addition, a transparent lid plate 6a is hinged to the top surface of the case 6 to open and close an opening provided therein.
The inside can be seen through this transparent cover plate 6a. Furthermore, an operation panel 6b is provided on the front surface of the case 6.

The paper 9 inserted from this paper feed/discharge lower
As shown in FIGS. 9 to 9, the paper is guided obliquely within the case 6 along the front surfaces of the upper and lower paper guide plates 12 that are inclined forward from the paper feed/discharge lower toward the lower end. The paper guide plate 12 is stretched between left and right frame side plates 13. Moreover, between these frame side plates 13, a square bar-shaped fixed platen 14 is installed.
A horizontally long slit 1 formed between the upper and lower paper guide plates 12
The paper 9 is installed so that the front face faces the platen 5 and is inclined in accordance with the inclination of the paper guide plate 12, and the paper 9 is printed along the inclined front surface of the platen 14 as described below. A spring cushion is provided to the platen 14 from the rear side by a spring 16, and its longitudinal position is controlled by an adjustment screw 17 on the front side.
It can be adjusted slightly by

As shown in FIGS. 4 and 5, left and right paper guide rulers 18 are provided on the left and right sides of the paper guide plate 12 to guide and position the left or right edge of the paper 9.

The paper 9 usually has its left edge aligned with the paper guide ruler 18 on the left.
Insert it from the paper feed/discharge lower so that it is in contact with the paper. In order to detect the insertion, an upper optical paper sensor 20 is attached to a bracket 19 projecting from the left paper guide ruler 18 above the platen 14, as shown in FIG. Note that the paper guide plate 12 has another one that detects the width of the paper 9 in cooperation with the paper sensor 20.
More than one paper sensor is disposed to the left thereof.

As shown in FIG. 3, a line feed motor 21 capable of forward and reverse rotation is attached to the left frame side plate 13.
When this is driven, a plurality of upper line feed rollers 24 and a plurality of lower line feed rollers 24 connected to this via a timing belt 22 and upper and lower pulleys 23 rotate together with the line feed roller shaft 25. do. These upper and lower line feed rollers 24 are pivotally supported between the left and right frame side plates 13 at approximately equal intervals above and below the platen 14, respectively. These upper and lower line feed rollers 24 are connected to the upper and lower paper guide plates 1
2, each of the upper line feed rollers 24 feeds through a window hole 26 provided in the upper paper guide plate 12, and each lower line feed roller 24 feeds into the lower paper guide plate 12. They each slightly protrude forward from the provided window holes 26.

In front of these upper and lower line feed rollers 24, upper and lower paper pails 27 are provided to face each other. Each paper pail 27 has a pail shaft 29 horizontally suspended between left and right pail levers 28 rotatably supported by lever shafts 28 a on the left and right frame side plates 13 , and a pair of line feed rollers 24 are connected to the pail shaft 29 . A corresponding pail roller 30 is rotatably mounted. Each pail lever 28 is urged toward the line feed roller 24 by a spring 31. The upper and lower paper pails 27 individually rotate their left and right pail levers 28 clockwise or in the direction of the half-hour hand, so that the pail rollers 30 are brought into pressure contact with or separated from the corresponding line feed rollers 24, and the movement thereof is , as shown in FIG. 2, are performed in conjunction with each other based on the drive of the same cam actuating motor 32, which is capable of forward and reverse rotation and is attached to the right frame side plate 13, but the directions of movement are opposite to each other. .

That is, as shown in the figure, the rotation of the cam actuating motor 32 is caused by its motor gear 33 and the large gear 34 meshing with it.
, coaxial middle gear 35. The signal is transmitted to the paper pail switching cam 37 which is coaxial with the large gear 36 through the large gear 36 meshing with the large gear 36, and this cam 37 moves in the hour hand (CW) or counterclockwise (CCW) direction around the cam shaft 37a by the drive of the motor 32. Rotate.

As shown in FIG. 10, one revolution of the cam 37 is detected by turning on a cam position detection switch (microswitch) 40 by a recess 39 of a disk 38 that rotates integrally with the cam 37. This cam 37 and the upper paper pail 2
7 and the right pail lever 28 of the lower paper pail 27, and between the cam 37 and the right pail lever 28 of the lower paper pail 27, there is a cam follower 41 that similarly engages with the cam 37 and a cam follower 41 that engages with the pail lever 28. A lever actuating cam 42 is provided.

The cam follower 41 is rotatably supported by a pin 43 protruding from the right frame side plate 13, and the lever actuating cam 42
is a horizontally long shaft 44 horizontally suspended between the left and right frame side plates 13.
is fixed to. These cam followers 41 and lever actuating cams 42 each have sector-shaped gears 45° 46,
The gears 45, 46 are in mesh with each other. In each of the upper and lower paper pails 27, another lever operating cam 42a without a fan-shaped gear is fixed to the left end of the horizontally long shaft 44, as shown in FIG. ing.

Therefore, in FIG. 10, the cam position detection switch 40
When the cam 37 rotates in the CW direction from the on state,
The upper cam follower 41 is rotated in the CW direction (upward) by the cam 37, and the rotation is transmitted to the upper lever operating cam 42 via the gear 45, 46, and the lever operating cam 42 rotates the upper paper pail 27. At the same time as the right side pail lever 28 is rotated in the CCW direction, the left side pail lever 28 is rotated by the left side lever operating cam 42a.
are rotated in the same direction, and the upper line feed roller 24
The upper pail roller 30, which was in pressure contact with the line feed roller 24, separates from the line feed roller 24. At this time, the lower pail roller 30 comes into pressure contact with the lower line feed roller 24. On the contrary, when the cam 37 rotates in the CCW direction,
The lower cam follower 41 is rotated in the CCW direction (downward), and the rotation is transmitted to the lower lever operating cam 42 and the left lever operating cam 42a.
As a result, the left and right pail levers 28 of the lower paper pail 27 are rotated in the CW direction, and the lower pail roller 30 is separated from the lower line feed roller 24. At this time, the upper pail roller 30 is pressed against the upper line feed roller 24.

A paper positioning mechanism driven by the line feed motor 21 is also mounted on the rear side of the paper guide plate 12 along the upper line feed roller shaft 25 as described below.

That is, the rotation of the upper pulley 23, to which the rotation of the line feed motor 21 is transmitted as described above, is caused by the rotation of the fourth. 6
．． As shown in Figure 7, bevel gear 4 is integrated with it.
7. To the timing belt 54 through one bevel gear 48 that meshes with this, a gear 49 that is integral with the bevel gear 48, gears 50, 51, and 52 that are meshed sequentially, and a boolean IJ53 that is integral with the gear 52. communicated. On the rear side of the paper guide plate 12, an upper horizontally long movable plate 55 is attached to the paper guide plate 1 via left and right brackets 56.
It is mounted so that it can move back and forth while maintaining a parallel state to 2. The left and right brackets 56 have elongated holes 57 that are slidably fitted to the horizontally elongated shaft 44, and are urged forward by springs 58. A plurality of small paper alignment rollers 59 are protruded from the front-rearward movable plate 55 so as to be rotatable at a predetermined interval in the left and right directions. 59 projects forward through a window hole 60 provided in the paper guide plate 12 at a position slightly below the line feed roller shaft 25. The timing belt 54 is attached to an idler 6 at a predetermined position on the front-back movable plate 55 so as to cover all the paper alignment rollers 59.
All of the pulleys 63 fixed to the shaft 62 of the paper alignment roller 59 are engaged with this timing belt 54, and when the line feed motor 21 is driven, all the paper alignment rollers 59 rotate at the same time. .

The details of the feeding operation of the paper 9 will be described later, but the all paper alignment roller 59 normally protrudes in front of the paper guide plate 12 so as to also serve as an upper paper stopper for temporarily stopping the paper 9. When the upper pail roller 30 is separated from the upper line feed roller 24, when paper 9 is inserted from the upper paper feed/discharge lower, the paper i9 descends while being guided by the paper guide plate 12. , its lower edge contacts the paper alignment roller 59 to prevent further descent, and is propelled to the left by the rotation of the paper alignment roller 59. Then, even after the paper 9 moves to the left to the position where its left edge contacts the left paper guide ruler 18, the paper 9 is further moved by the propulsive force of the paper alignment roller 59, so that the paper 9 is moved to the left side by the left paper guide plate 12. It is positioned so that the edges are aligned, and even if it is inserted at an angle as shown in FIG. 4, it will be oriented in this manner. After this, the front and rear movable plate 55 retreats, and the paper alignment roller 59 moves toward the paper guide plate 12.
At the same time, the upper pail roller 30 is pressed against the upper line feed roller 24. Therefore, the paper 9 is allowed to descend, and is fed further downward from the front surface of the platen 14 by the upper line feed roller 24, and is then fed to the lower line feed roller 24 and the lower pail roller 30 further away from the platen 14. come between.

On the other hand, in order to temporarily stop the paper 9 inserted from the lower paper feed/discharge port 8, a paper stop mechanism is installed on the rear side of the paper guide plate 12, as shown below, on the lower line feed roller shaft. It is installed along 25.

That is, a lower longitudinally movable plate 64 similar to the upper longitudinally movable plate 55 is similarly mounted on the rear side of the paper guide plate 12 via left and right brackets 65 so as to be movable longitudinally. This longitudinally movable plate 64 is also urged forward by a spring 66, and elongated holes 67 provided in the left and right brackets 65 are slidably fitted into the horizontally elongated shaft 44 on the lower side. A paper stopper (pin) 68 that corresponds to the paper alignment roller 59 in a one-to-one relationship is fixed to the front-back movable plate 64 so as to protrude toward the front side. This paper stopper 68 is
When the back-and-forth movable plate 64 is in the forward position, it protrudes forward from the window hole 69 of the paper guide plate 12 at a position slightly above the lower line feed roller shaft 25, and from the lower paper feed/discharge port 8. The inserted paper 9 has its upper edge brought into contact with the paper stopper 68, and further upward movement is restricted.

In order to detect the paper 9 inserted from the bottom in this way,
In addition, in order to detect the length of the paper 9 in cooperation with the upper paper sensor 20, a lower paper sensor 70 (see FIG. ) are provided.

As described above, the paper alignment roller 59, which is also the upper paper stopper, and the lower paper stopper 68 are simultaneously moved forward and backward by the stopper operating mechanism based on the forward and reverse rotation of the cam actuating motor 32, as described below.

That is, as shown in FIG. 9, a stopper operating cam 71 is further fixed to the camshaft 37a, and when the cam operating motor 32 is driven, this stopper operating cam 71 rotates simultaneously with the paper pail switching cam 37. A protrusion 71 a provided at the center of a C-shaped arm 72 engages with the stopper operating cam 71 . This arm 72 is the third
A guide pin 74 protruding from the right frame side plate 13 is slidably fitted into a long hole 73 provided at a location, and is translated in parallel by rotation of the cam 71. In order to transmit this parallel movement to the upper and lower back and forth movable plates 55 and 64,
Upper and lower cranks 75 are each fixed to a horizontally long shaft 76. Each crank 75 is provided with a pin 77 at its midpoint and a U-shaped portion 78 at its free end. And the upper crank 7
5, the pin 77 is slidably fitted into the elongated hole 79 at the upper free end of the arm 72, and the U-shaped portion 78 is fitted into the pin protruding from the right bracket 56 of the upper front-back movable plate 55. 80 is engaged. Also, the lower crank 75
Similarly, the pin 77 is slidably fitted into the elongated hole 79 at the lower free end of the arm 72, and the U-shaped portion 7
8 is engaged with a pin 80 protruding from the right side bracket 65 of the lower longitudinally movable plate 64.

Therefore, when the cam actuating motor 32 rotates forward or reversely and the stopper actuating cam 71 is rotated by a predetermined angle (for example, 180 degrees) in the CCW direction from the solid line state in FIG. As shown by the chain line, the upper and lower cranks 75 are rotated at the same time, the upper and lower back-and-forth movable plates 55 and 64 are moved backward, and the paper alignment roller 59 and the paper stopper 68 are moved simultaneously to the paper guide plate. Retreat to a little behind 12.

In addition, such a movement can also be performed on the left side with the front and rear movable plate 55°64
As shown in FIG. 7, upper and lower cranks 75a on the left side are similarly fixed to upper and lower oblong shafts 76 at the left end, as shown in FIG. are doing.

In addition, in order to normally maintain the stopper operating cam 71 in the solid line state shown in FIG. 9, the cam shaft 37a is rotated as shown in FIG.
An auxiliary cam 81 having a similar shape is separately fixed to the auxiliary cam 81, and the rotation of the auxiliary cam 81 is braked by a pair of upper and lower brake pieces 82.

Each brake piece 82 is connected to the frame side plate 13 by a pin 82a.
A roller 82b provided at the free end is biased by a spring 82c so as to come into pressure contact with the auxiliary cam 81.

In addition, upper and lower paper floating prevention plates 83 are provided opposite to each other at the front side of the upper and lower paper guide plates 12 with a certain gap therebetween, and horizontally elongated paper pressers 84 are fixed to the upper and lower pail shafts 29, respectively. .

Next, a carrier device according to the present invention that moves in front of and parallel to the platen 14 will be described.

As shown in FIGS. 12 and 15, the carrier 85 is
They are mounted on a carrier guide shaft 86 on the front side and a carrier guide shaft 87 on the rear side with respect to the printing machine main body l, so as to face the platen 14 at right angles and to be similarly inclined (for example, approximately 30 degrees). . The front carrier guide wheel 86 is fixedly installed between the left and right frame side plates 13, but the rear carrier guide shaft 87 is rotatably installed as described later. A print head frame 89 to which a dot-impact type print head 88 is fixed, and a cassette frame 91 to which a ribbon cassette 90 is removably mounted are attached to the carrier 85, and the print head frame 89 is attached to a platen as shown below. 14, and the cassette frame 91 is translated back and forth toward the platen 14. In the following description, for convenience, the direction of movement of these underframes on the carrier 85 will be based on the platen 14, and movement toward it will be referred to as forward movement, and movement away from it will be referred to as backward movement. Further, the carrier 85 itself also has the platen 14 side as its front side.

The print head frame 89 connects the lower ends of the left and right side plates 89a with C-shaped recesses to the print head rotation shaft 92.
The carrier 85 is rotatably pivoted to the front end portions of the left and right side plates 85a of the carrier 85. Therefore, the print head 88
By rotating the print head frame 89 forward, the first
It is then shifted to the printing operation position shown in FIG. 2, and faces the platen 14 with a predetermined printing gap formed therein in a downwardly inclined state. Further, by rotating the print head frame 89 to the rear side, the print head 88 is moved far away from the platen 14 and tilted upward as shown in FIG.

On the other hand, in the cassette frame 91, a roller 93 pivotally supported on the left and right side plates 91a is slidably fitted into an inclined guide groove 94 provided on the left and right side plates 85a of the carrier 85. It can move forward and backward, and when moving forward, it rises along with it, and when retreating, it descends, but
Its overall orientation remains unchanged.

The advancement/retraction of the cassette frame 91 and the print head frame 89 and the transport of the ink ribbon within the ribbon cassette 90 are driven by a single ribbon feed motor 95 attached to the lower surface of the carrier 85 and capable of rotating in forward and reverse directions. It will be done.

That is, as shown in FIGS. 17 and 19, a motor gear 96 of a ribbon feed motor 95 is engaged with a feed gear 97 and a release gear 98.

The feed gear 97 includes a ribbon feed motor 95.
The first shaft transmits its rotation to the transmission vertical shaft 99 only when it rotates in the normal direction.
A second one-way clutch 102 is connected to the release gear 98 and transmits rotation to the bevel gear 101 only when the ribbon feed motor 95 is reversed. The rotation of the transmission vertical shaft 99 is controlled by a gear 103 fixed to the upper end thereof.
, an idle gear 104 mounted on the cassette frame 91 so as to be connectable and detachable with the idle gear 104, a gear 105 that meshes with it, a gear 106 that is integrated with it, and a ribbon feed gear 107 that meshes with it.
07 so as to be movable up and down, and is transmitted to a ribbon feed shaft 108 that projects into the ribbon cassette 90 from below. Therefore, when the ribbon feed motor 95 rotates normally, the ink ribbon in the ribbon cassette 90 is transferred.

On the other hand, the rotation of the bevel gear 101 is transmitted to the transmission vertical shaft 110 by the bevel gear 109 meshing therewith.

Small pulleys 111 are fixed to both left and right ends of this vertical transmission shaft 110, and a large pulley 113 that is supported by a shaft 112 on the left and right carrier side plates 85a corresponds to the small pulleys 111, respectively. A timing belt 114 is attached to each of them. These left and right large pulleys 113
As shown in FIG. 21, the left and right first links 115 and the left and right transmission links have C-shaped sides and are rotatably supported on the print head rotation shaft 92 in the same manner as the print head frame 89. The left and right side plates 8 of the print head frame 89 are connected via the arm 116.
It is connected to 9a. Each first link 115 has one end attached to the eccentric portion of the large pulley 113 with a pin 117 as shown in FIGS. Transmission arm 1
16 is rotatably connected to a connecting shaft 118 installed between the upper end portions of the two. Left and right side plates 89 of print head frame 89
A has a long hole 119 into which the connecting shaft 118 is slidably fitted.
are provided and can be rotated in conjunction with the print head frame 89 and the left and right transmission arms 116, but these can be rotated independently of each other by the length of the elongated hole 119. Both left and right ends of the connecting shaft 118 and the print head frame 89
As shown in FIG. 18 (bottom view) and FIG. 20, a tension spring 120 is stretched between the left and right side plates 89a, and the print head frame 89 normally rotates together with the left and right transmission arms 116. do.

Further, left and right second links 121 are rotatably attached to both left and right ends of the connecting shaft 118, and left and right third links 123 are rotatably attached to the left and right side plates 85a of the carrier 85 by a link shaft 122. The third link 1 is freely pivoted.
The free end of 23 is connected to the cassette frame 91 by pins 1 to 4.
is connected to the front end portions of the left and right side plates 91a. and,
The second link 121 and the third link 123 are connected by slidably fitting a long hole 125 provided at the free end of the former and a pin 126 protruding from the intermediate part of the latter. Further, a tension spring 127 is stretched between the pin 126 and the connecting shaft 118, and the print head frame 89
When the cassette frame 91 rotates, the cassette frame 91 moves in parallel. However, these frames can move independently of each other by the length of the elongated hole 125.

Therefore, with the printing head 88 set at the printing operation position as shown in FIGS.
For example, 180 degrees rotation in the direction and the print head frame 89
is pulled rearward by the first link 115 and rotates rearward about the print head rotation shaft 92 as shown in FIG. 14, and the print head 88 rotates the print as shown in FIGS. At the same time as it retreats to a predetermined retracted position with its tip facing upward, the rotation of the print head frame 89 is transmitted to the third link 123 via the second link 121, and the third link 123 rotates rearward. As a result, the cassette frame 91 retreats while descending along the inclined guide groove 94, and the ribbon cassette 90 mounted thereon retreats and descends with its front side tilted downward. When the print head 88 and ribbon cassette 90 are retracted in this way, the field of view is widened in front of the platen 14, and this, combined with the fact that the platen 14 itself is inclined, makes it possible to hold the paper 9 in front of it at a right angle. Moreover, it can be seen directly over a wide range.

From this retracted state, the ribbon feed motor 95 reverses again, the large pulley 113 again rotates 180 degrees in the CCW direction, the print head frame 89 rotates forward, and at the same time the cassette frame 91 moves forward while rising. , print head 8
8 and ribbon cassette 90 simultaneously return to the states shown in FIGS. 12 and 13.

By the way, during the return movement, the print head 88 is locked at the print operation position as follows, a little before the 180 degree rotation of the large boot 13 is completed.

On the left and right side plates 85a of the carrier 85, left and right locking pieces 128 each having a shape as shown in FIG. Each locking piece 128 is biased in the CCW direction by a spring 130 wound around a pin 129. This locking piece 128 has an upper recess 128a that is pushed by a push pin 131 protruding from the middle part of the first link 115 as shown in FIG. As shown in the figure, a lower recess 128b that engages with a protruding locking pin 132 is provided, and a lower lower edge 128c of the lower recess 128b is linear.

When the print head 88 and ribbon cassette 90 are retracted as described above, the push pin 13 of the first link 115
1 is far away from the locking piece 128 as shown in FIGS. 15 and 16, and the lower edge 128c of the locking piece 128 locks the print head frame 89 that has come out of the lower recess 128b. It is engaged with pin 132. Larger pulley 1 than this state
13 rotates in the CCW direction, the first link 115 is pushed forward, so the transmission arm 116 is rotated forward, and accordingly, the print head frame 89 is also rotated forward. This forward rotation of the print head frame 89 causes the locking pin 132 to move the locking piece 128 CW as shown in FIG.
While slightly rotating in the direction, it enters into the recess 12Bb on the lower side and engages therewith. Therefore, rotation of the print head frame 89 is restricted, and the print head 88 is positioned at the print operation position, and the ribbon cassette 90 is also positioned at a predetermined position.

However, the first link 115. Transmission arm 116.

Since the second link 121 is allowed to move by the length of the elongated holes 119 and 125, the print head frame 8
9 continues to move even after its rotation is restricted as described above. This movement is caused by the lower end protrusion 123 of the third link 123.
a is stopped by engaging with the locking protrusion 85b of the side plate 85a of the carrier 85, and when the rotation of the large boot 13 is stopped, the connection mechanism ( evacuation mechanism) is the 12th
The state shown in FIG. 13 and FIG. 13 is maintained. Because the connecting mechanism moves smoothly, even if there is any assembly unevenness between the parts that make up the connecting mechanism, it is absorbed, and the print head 88 is accurately positioned at the printing position.

The fact that the print head 88 has been positioned at the printing operation position in this manner is detected when the print head standby switch (micro inch) 134 is turned on by the switch operating piece 133 provided on the large pulley 113.

The carrier 85 is connected to a spacing motor 136 (block diagram in FIG. 24) via a carrier drive belt 135, and is slid to the right or left by the spacing motor 136. This carrier 85 is detected by the carrier position sensor 137 at the left end position and right end position of its sliding range.

A transparent horizontally elongated paper cover 138 that presses the paper 9 against the platen 14 is attached to the upper front end of the carrier 85. As shown in FIG. 18, this vapor cover 138 is provided with a printing window 138a at a position facing the printing tip of the print head 88, and a printing window 138a is provided at a position at a predetermined distance from this window to print on the paper 9. A printed aiming mark 139 for aiming the position is displayed. This printing aiming mark 139 forms a square standard character size frame 140 of a size corresponding to the standard character size so as to indicate the size of the character to be printed, and also indicates double-width character size on all sides. A protrusion 141 is formed to protrude.

A cross-shaped dividing line 142 is further formed within the standard character size frame 140 to divide the inside into four equal parts, and the center 143 of the cross-shaped dividing line 142 serves as a printing standard point. The four protrusions 141 are assumed to have a double-width character size by imagining a rectangle connecting their tips.

Further, one end of the carrier guide shaft 87 is connected to a print gap adjustment lever 144 that rotates around a point eccentric from the center of the carrier guide shaft 87, and when the lever 144 is rotated, the carrier guide shaft 87
When the carrier 85 is rotated, the carrier 85 moves slightly back and forth as is known, and the print tip of the print head 88 and the platen 1
The printing gap between the four spaces is changed. A conductive switch lever 145 is fixed to the other end of the carrier guide shaft 87, as shown in FIG. It is set up. When the carrier guide shaft 87 is rotated, the switch lever 145 comes into contact with one electric terminal 146 at a position corresponding to the amount of rotation, and the amount of rotation, that is, the printing gap is detected. This is digitally displayed on a digital display provided on the operation panel 6b of the printing machine main body 1.

Next, the electrical configuration and overall operation flow of this printing machine will be explained.

Among the above-mentioned configurations, the electrical means are built in the console device 3 and include a CPU 147, as shown in FIG.
It is centrally controlled by a microcomputer including ROM148 and RAM149. In addition, in the same figure, 1
50 is a console device 3 separate from the liquid crystal display device 4.
Pilot LED (light emitting diode) installed on top
, 151 is a cover safety switch that detects opening and closing of the transparent cover plate 6a in the printing machine main body 1.

FIG. 25 shows the main initial routine, in which the following steps are performed in each step.

190...When you turn on the power, it enters this main initial.

191...All software is initialized.

192... Insert a floppy disk into the floppy disk drive 5.

193...Access the floppy disk and load the program stored on it.

194...Do a soft initial of one example of the printing machine body.

195... It is determined whether the cover safety switch 151 is turned on.

196...If the cover safety switch 151 is on, it is determined whether the paper sensors 20.70 on both the upper and lower sides are on.

197... When both of these paper sensors 20 and 70 are on, a paper ejection routine is entered and the paper 9 is ejected.

If it is off at 200...196, the cam initial routine shown in FIG. 26 is entered.

After 300...200, the carrier initial routine shown in FIG. 27 is entered.

400...300 l&, the head action initial routine shown in FIG. 28 is entered.

198... Select a function according to the menu screen displayed on the liquid crystal display device 4.

The contents of each step of the cam initial routine 200 shown in FIG. 26 are as follows.

201... It is determined whether the cam position detection switch 40 is on.

202... When turned on in 201, the cam actuating motor 32 is once rotated by 45 degrees in the CCW direction.

203...The cam actuating motor 32 is rotated in the CW force direction one step at a time.

204... It is determined whether the cam position detection switch 40 is on.

205... After the cam position detection switch 40 is turned on, the cam actuating motor 32 is rotated by 180 degrees in the CW force direction.

206...The line feed motor 21 is initialized.

Due to this cam initial operation, both the upper and lower pail rollers 30 are connected to the upper and lower line feed rollers 24.
The paper alignment roller 59 and the paper stopper 68 are set at a position protruding forward from the paper guide plate 12.

The contents of each step of the carrier initial routine 300 in FIG. 27 are as follows.

301...Carrier position sensor 1 on the left end
37 is on.

302... When the spacing motor 136 is off in 301, the spacing motor 136 is rotated one step at a time in the CCW direction.

303...Carrier position sensor 1 on the left end
37 is on.

304... After turning on at 303, the spacing motor 136 is rotated one step at a time in the CW force direction.

305...Carrier position sensor 1 on the left end
It is determined again whether or not 37 is on.

306... After the leftmost carrier position sensor 137 is turned off at 305, the spacing motor 1
36 is rotated again in the CCW direction by a small predetermined number of steps.

Through such an operation, the carrier 85 is once slid to the left and detected by the carrier position sensor 137, then slid to the right until it deviates from the detection position, and then moved to the left again by a predetermined small amount. It is slid by the number of steps, and the stopped position is determined as the home position.

Head action initial routine 400 in FIG.
The contents of each stem knob are as follows.

401...Print head standby switch 13
4 is on.

402...When turned on at 401, rotates the ribbon feed motor 95 by one step in the CCW direction,
Turn off the print head standby switch 134 once.

403... Ribbon feed motor 95 CCW
Rotate one step at a time in the direction.

404...Print head standby switch 13
4 is turned on again.

FIG. 29 shows a paper setting routine 500, and the contents of each step are as follows.

501... Determines whether the upper paper sensor 20 is on.

502... Determines whether the lower paper sensor 70 is on.

When it is turned on at 600...501, it is assumed that the paper 9 has been inserted from the upper paper feed/discharge lower, and the upper insert routine shown in FIG. 30 is entered.

When it is on at 700...502, it is assumed that the paper 9 has been inserted from the front paper feed/discharge port 8, and the front insert routine shown in FIG. 31 is entered.

503...Paper setting is completed.

The contents of each step of the upper insert routine shown in FIGS. 30(A) and 30(B) are as follows.

601...The line feed motor 21 is rotated by a predetermined number of steps in the CW force direction, and the paper alignment roller 59 is rotated to align the paper 9 to the left as described above.

602... It is determined whether the two upper paper sensors 20 are on.

603...When 602 is off, that is, when the width of the paper 9 is shorter than the specified value, the paper set routine 5
00 is removed and the state returns to the paper set acceptance state.

604...The cam actuating motor 32 is rotated one step at a time in the CCW direction.

605... It is determined whether the cam position detection switch 40 is on. Here, when turned on, the upper pail roller 30 comes into pressure contact with the upper line feed roller 24,
Further, the paper alignment roller 59 and the paper stopper 68 are retracted to the rear of the paper guide plate 12.

606...The line feed motor 21 is rotated one step at a time in the CW force direction to transport the paper 9 downward.

607... Determines whether the upper paper sensor 20 is on.

608... Determines whether the lower paper sensor 70 is on.

609... After both the upper and lower paper sensors 20 and 70 are turned on, the line feed motor 21 is further rotated by a predetermined number of b steps. Here, the length of the paper 9 is determined based on the length extending between the upper and lower paper sensors 20.70, but for safety reasons, the length of the paper 9 is longer than this (the paper 9 is transported).

610... Determines whether the upper paper sensor 20 is on.

611... When the upper paper sensor 20 is off in 607 or 610, the length of the paper 9 is insufficient, so the paper 9 is ejected.

After 612...611, cam initialization is performed as described above.

613...Same as 603 above.

614...Cam actuating motor 32 is rotated 180 degrees in the CCW direction. As a result, the upper pail roller 3
0 leaves the upper line feed roller 24, while
The lower pail roller 30 is pressed against the lower line feed roller 24, and the paper 9 is further transported downward by the lower line feed roller 24.

615...The line feed motor 21 is rotated one step at a time in the CW force direction to further transport the paper 9 downward.

616... Determines whether the upper paper sensor 20 is on.

617... After the upper paper sensor 20 is turned off at 617, the cam actuating motor 32 is moved in the CW force direction i8.
Rotate 0 degrees. As a result, the lower pail roller 30
is separated from the lower line feed roller 24, while the upper pail roller 30 is separated from the upper line feed roller 2.
4.

618... Line feed motor 21 CCW
direction by a predetermined number of C steps, and the paper 9 is returned upward by a predetermined amount until its upper edge passes over the upper paper sensor 20.

619...The line feed motor 21 is rotated one step at a time in the CW force direction, and the paper 9 is lowered again.

620... Determines whether the upper paper sensor 20 is on.

621... After the upper paper sensor 20 is turned off at 620, the cam actuating motor 32 is rotated 1 in the CCW direction.
Rotates 80 degrees. As a result, the upper pail roller 3
0 leaves the upper line feed roller 24, while
The lower pail roller 30 is pressed against the lower line feed roller 24.

622... The line feed motor 21 is rotated by a predetermined number of d steps in the CW force direction to finally position the paper 9: The contents of each step of the front insert routine 700 in FIG. 31 are as follows. It is.

701... After the lower paper sensor 70 is turned on in step 502 in FIG. 29, the paper 9
Waits for a predetermined amount of time to be manually aligned to the left.

702... Determines whether the lower paper sensor 70 is still on.

703...Cam operating motor 32 in CW force direction 9
Rotate 0 degrees. As a result, the paper stopper 68 and the paper alignment roller 59 are retracted to the rear of the paper guide plate 12, and the lower pail roller 30 is pressed against the lower line feed roller 24.

704... Line feed motor 21 CCW
Rotate one step at a time in the direction and use! 9 is transferred upwards.

705... Determines whether the lower paper sensor 70 is on.

706... Determines whether the upper paper sensor 20 is on.

707... It is determined whether the upper paper sensor 20 is on or not.

When the lower paper sensor 70 is off at 708...705 and the upper paper sensor 20 is off at 707, the paper 9 is ejected because its length is short.

709... After 708, cam initialization is performed as described above.

710...The paper setting routine 500 is exited and the state returns to the paper cent reception state.

711...Cam operating motor 32 in CW force direction 1
Rotate step by step.

712... Determines whether the cam position detection switch 40 is on. When this is turned on, the lower pail roller 30 comes into pressure contact with the lower line feed roller 24, while the upper pail roller 30 separates from the upper line feed roller 24.

713...The line feed motor 21 is rotated one step at a time in the CW force direction to transport the paper 9 downward.

714... Determines whether the upper paper sensor 20 is on.

715......When the upper paper sensor 20 is turned off at 714, the cam actuating motor 32 is rotated 1 in the CCW direction.
80 degree rotation. As a result, the lower pail roller 30
moves away from the lower line feed roller 24, while the upper nobail roller 30 moves away from the upper line feed roller 2.
4.

716...The line feed motor 21 is rotated by a predetermined number of e steps in the CW force direction to finally position the paper 9.

"Effects of the Invention" As detailed above, according to the carrier device of the present invention, it is possible to automatically retract the print head or the ribbon cassette, or both, by using the ribbon feed motor that feeds the ribbon, for example, by reversing the motor. You can set the printing start position arbitrarily on the platen,
This is useful when deciding the print format. In addition, there is no need to provide a dedicated motor for evacuation.
It is economical and can reduce IT costs for carriers.

Easy drawing f: lo, : man

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is an external perspective view of the entire printing machine to which the present invention is applied; FIGS. 2 to 11 show the configuration on the platen side; and FIG. 2 is the right side view. side view,
Figure 3 is a left side view of the same, Figure 4 is a front view of the left side,
Figure 5 is a front view of the right side, Figure 6 is a partially cutaway plan view,
Figure 7 is a cross-sectional view taken along line 1-1 in Figure 4, Figure 8 is a cross-sectional view taken along line n-n in Figure 4, Figure 9 is a cross-sectional view taken along line 1-111 in Figure 4, and Figure 10 is a cross-sectional view taken along line n-n in Figure 4. FIG. 11 is a sectional view taken along the line nn. Moreover, FIGS. 12 to 23 show the configuration of the carrier side according to the present invention, FIG. 12 is a right side view thereof, and FIGS. 13 and 14 are views showing the state in which the print head is in the printing operation position. 15 and 16 are partially cutaway side views showing the state in the retracted position, FIG. 17 is a partially cutaway plan view, FIG. 18 is a bottom view, and FIG. 19 is a ribbon feed motor. Figure 20 is a side view of the mechanism that rotates the print head frame, Figure 21 is a side view of the transmission arm, which is a part of the mechanism, and Figure 22 is a side view of the mechanism that rotates the print head frame. A sectional view of a locking piece that locks the head frame, and FIG. 23 is an enlarged front view of a printed aiming mark. Further, FIG. 24 is a block diagram, and FIGS. 25 to 31 are flowcharts. 1... Printing machine body 2... Cable 3... Console device 3a... Keyboard 4... Liquid crystal display device 5...・・Fronpi disk drive 6・・・・
・Case 6a...Transparent lid plate 6b...Operation panel 7.8...Paper feed/output port 9...Paper 10...Paper Guide table 11... Paper guide stand 12... Paper guide plate 13... Frame side plate 14... Platen 15... Slit 16... ... Spring 17 ... Adjustment screw 18 ... Paper guide ruler 19 ... Bracket 20 ... Paper sensor 21 ... Line feed motor 22...
・Timing belt 23...Pulley 24...Line feed roller 25...
- Line feed roller shaft 26... Window hole 27... Paper pail 28... Pail lever 28a... Lever shaft 29... Pail shaft 30. ...Pail roller 31 ... Spring 32 ... Cam operation motor 33 ... Motor gear 34 ... Large gear 35 ... Middle gear 36...Large gear 37...Paper pail switching cam 37a...
...Cam shaft 38...Disk 39...Recess 40...Cam position detection switch 41...
・Cam follower 42... Lever operating cam 42a... Lever operating cam 43... Pin 44... Horizontal shafts 45, 46... Sector gear 47...Bevel gear 48...Bevel gear 49, 50.51.52...Gear 53...
... Pulley 54 ... Timing belt 55 ... Front and rear movable plate 56 ... Bracket 57 ... Long hole 58 ... Spring 59 ... Paper alignment roller 60 ... Window hole 61 ... Idler 62 ... Shaft 63 ... Pulley 64 ... Front and rear Movable plate 65... Placket 66... Spring 67... Long hole 68... Paper stopper 69... Window hole 70... ...Paper sensor 71...Stopper operating cam 71a...Protrusion 72...Arm 73...Long hole 74...Guide pin? 5.75a...Crank 76...Horizontal shaft 77...Pin 78...U-shaped portion 79...Long hole 80... ...Pin 81 ...Auxiliary cam 82 ...Brake piece 82a ...Pin 82b ...Roller 82c ...Spring 83 ... ... Paper floating prevention plate 84 ... Paper presser 85 ... Carrier 85a ... Side plate 85b ... Locking protrusions 86, 87 ... ...Carrier guide shaft 88...
・Print head 89...Print head frame 89a...Side plate 90...Ribbon cassette 91...Cassette frame 91a...Side plate 92 ...Print head rotation shaft 93...Roller 94...Incline guide groove 95...Ribbon feed motor 96...
・Motor gear 97...Feed gear 98...Release gear 99...Transmission vertical shaft 100...One-way clutch 101...
... Bevel gear 102 ... One-way clutch 103 ...
...Gear 104...Idle gear 105...Gear 106...Gear 107...Ribbon feed gear 108...
... Ribbon feed shaft 109 ... Bevel gear 110 ... Transmission vertical shaft 111 ... Small pulley 112 ... Axis 113 ... Large pulley 114... Timing belt 115... First link 116... Transmission arm 117... Pin 118... Connection shaft 119... ...Elongated hole 120...Tension spring 121...Second link 122...Link shaft 123...Third link 123a...Lower end Projection 124... Pin 125... Elongated hole 126... Pin 127... Tension spring 128... Locking pieces 128a, 128b- - Recessed portion 128c...Lower edge 129...Pin 130...Spring 131...Pushing pin 132...Locking pin 133. ...Switch actuation piece 134 ...Print head standby switch 13
5...Carrier drive belt 136...
Spacing motor 137...Carrier position sensor 138...Paper cover 138a...Printing window 139...Printing aiming mark 140...Standard characters Size frame 141...Protrusion 142...Cross-shaped partition line 143...Center 144...Print gap adjustment lever 145...
... Switch lever 146 ... Electronic terminal 147 ... CPU 148 ... ROM 149 ... RAM 150 ... Pylon ILED 151 ... ...Cover Safety Isothiophage Figure 8 Figure 25 Figure 26

Claims (1)

[Scope of Claims] 1. In a carrier device for a printing machine equipped with a print head and a ribbon cassette, a motor capable of forward and reverse rotation; a first clutch that transmits the rotation only when the motor rotates forward; a second clutch that transmits rotation only when the rotation is reversed; a ribbon feed mechanism that is driven by the rotation transmitted from one of the first and second clutches to transport the ribbon in the ribbon cassette; A carrier device for a printing machine, comprising: an evacuation mechanism that is driven by the transmitted rotation and retracts at least one of the print head or the ribbon cassette from an operating position. 2. The retracting mechanism includes a print head retracting mechanism for retracting the print head and a cassette retracting mechanism for retracting the ribbon cassette, and these are interlocked. Printing machine carrier device.