JPS615965A - Thermal transfer recording device - Google Patents

Abstract

PURPOSE:To perform an overlapping recording with the reversing of a recording paper through a friction without requiring any sprocket mechanism, by braking a winding core having an ink paper wound while the recording paper is being reversed utilizing friction between the recording paper and a roller. CONSTITUTION:With a thermal head 30 being left lowered, a platen roller 1 is reversely driven to reverse the portion L finished with recording in the first color of a recording paper 62 in order to make a recording in the second color. While the recording paper 62 is being reversed through friction between the recording paper 62 and the roller 1, the winding core 24 is braked to prevent the used ink paper portion wound on the core 24 from reversion.

Description

Detailed Description of the Invention (Field of Application of the Invention) The present invention uses an ink paper cassette, places the ink paper pulled out from the cassette on a roller overlapping a recording paper, and presses a gutter onto a thermosensitive material from above. The present invention relates to a thermal transfer recording device that performs thermal transfer recording, and more specifically, when recording in color, in order to record the recorded image part in yellow if it is yellow first, and then in magenta if it is magenta, it is necessary to start recording. When refeeding the ink paper to the position, a brake is applied to the ink paper take-up shaft to prevent the ink paper that was fed together with the recording paper from being overlapped with the recording paper during the first yellow recording to be sent back together. The present invention relates to a reverse transport means for reverse transport while applying pressure.

[Background of the invention]

Conventionally, as a means for conveying recording paper in a thermal transfer recording device (hard copy device) that performs color print recording on recording paper using thermal ink paper of multiple colors made by coating a strip-shaped film with thermal ink, A sprocket feeding means has been employed in which a recording paper, in which driving holes are continuously provided on both sides of the recording paper, is driven back and forth by engaging a sprocket provided on a platen roller with the holes.

In other words, during recording, recording and conveyance are performed by rotating the platen roller while pressing the ink paper and the recording paper overlapping between the thermal head and the platen roller. Stop the rotation of the roller, release the pressure on the thermal head, reverse the platen roller, drive only the recording paper with the sprocket, and return it to the recording start position (the used ink paper is wound up on the take-up shaft) I left it alone).

However, with this method, it is necessary to install sprockets on both sides of the platen roller, which increases the cost of the device and also requires the recording paper to have holes on both sides. I had to cant the part where I opened it. Furthermore, due to the clearance between the sprocket and the holes provided in the recording paper, dots tend to be misaligned when overlapping recording is performed multiple times for color printing, which has a negative effect on color image quality.

On the other hand, in the conventional conveyance method using friction (frictional force), only the recording paper is sandwiched between the platen roller using an auxiliary roller, and the forward and reverse rotation of the platen roller causes the recording paper to move back and forth. A method has also been proposed, but in this method, when wrapping the recording paper around the platen roller, the wrapping includes not only the part corresponding to the head but also the part corresponding to the auxiliary roller.
As a result, the recording paper wraps around the platen roller at a larger angle, making it difficult to convey the recording paper when thick and stiff recording paper is used.

In order to avoid this, the diameter of the platen roller must be increased and the corners of the wrapping must be made as small as possible, but this has disadvantages such as increasing the size of the device and increasing the cost of the platen roller.

[Purpose of the invention]

The present invention has been made to overcome the drawbacks of the prior art as described above, and an object of the present invention is to move the recording paper against the platen roller without requiring a sprocket and by using friction. It is an object of the present invention to provide a thermal transfer recording device equipped with a recording paper conveying (reverse feeding) means that requires only small corners for winding, thereby making it possible to reduce the size and cost of the device.

[Summary of the invention]

The outline of the present invention is as follows. That is, as a means for reversing the recording paper after one color recording, the used ink paper portion that was overlapped with the recording paper during the one color recording is wound up on a winding shaft, and the winding shaft is reversed. The take-up shaft is braked so that the ink paper and the recording paper are stacked one on top of the other, and pressure is applied to the platen roller using a pressing means such as a thermal head, and the platen roller is reversed to remove the recording paper. This device uses a reverse feeding means that drives only the recording paper in the opposite direction while causing slippage between the ink paper and the recording paper using the friction between the ink paper and the platen roller.

The outline of the present invention will be explained in more detail with reference to FIG. FIG. 1 is a detailed explanatory diagram of the present invention.

In the figure, 1 is the platen opening, 1. is the axis, 22
is an ink paper made by coating a strip of film with heat-sensitive ink.
23 and 24 are winding cores, 30 is a thermal head, 37 and 40 are guide pins each having a wheel attached to its tip, and 62 is a recording paper. ink paper 22
This adopts a cassette type structure in which the material contained in the winding core 23 (feed-out reel) is unwound and wound onto the winding core 24 (S-take-up reel).

Next, the operation will be explained. First, as seen in FIG. 1(A), the roller 1 is located on one side of the ink paper 22, and the guide bins 37, 40 and the head 30 are located on the other side.

Next, the guide bins 37 and 40 descend to move the ink paper 22 against the roller l, as shown in FIG.
Wrap (press) over a predetermined angle range θ (center angle) and load. Next, as also shown in FIG. 1(B), the recording paper 62 is fed, and its leading edge is directed between the ink paper 22 and the roller 1.

At this time, when roller 1 is rotated in the direction of the arrow, roller 1
The recording paper 62 is conveyed by friction (frictional force) between the recording paper 62 and the recording paper 62 . When the recording paper 62 reaches a predetermined position (recording start position) as shown in FIG. 1(c), a sensor (not shown) detects this and stops the rotation of the roller 1.

Note that at this time, the ink paper 22 itself is
Even though there is friction between the roller 1 and the recording paper 62 or between the roller 1 and the recording paper 62, the recording paper 62 does not move (is not conveyed).

That is, a braking force F is applied to the winding core 23 as a feed-out reel by means not shown, and a pulling force F, which pulls the ink paper 22, is applied to the winding core 24 as a take-up reel by means not shown. has been added,
At all times, Fa > F.

Therefore, the ink paper 22 is stopped. This ink paper 22 is wrapped around the openings,
As mentioned above, even if the recording paper 62 is transported, the
, and F are determined, so the ink paper is not conveyed.

Next, the thermal head 30 descends and presses the ink paper 22 and the recording paper 62 against the roller 1, as shown in FIG. 1(d). When roller 1 rotates in the direction of the arrow in this state, the above-mentioned relationship F8>F breaks down and F
Since F > FB, the ink paper 22 is conveyed together with the recording paper 62.

At this time, if the thermal head 30 is energized by means not shown, the ink on the ink paper 22 is activated and transferred to the recording paper 62, and thermal transfer is performed.

Next, as shown in FIG. 1(e), once the recording paper 62 has been recorded for the length of one screen, the platen roller 1 temporarily stops. Further, the length of the ink paper 22 corresponding to the length of one screen of the recording paper 62 is connected to the guide bin 40 by a guide member (the conveyance path of the ink paper 22 is bent from the conveyance path of the recording paper 62). The recording paper 62 is separated from the recording paper 62 and wound around the core 24 as a guide member. This completes recording of one color.

Next, the length of the recording paper 62 that has been recorded in one color must be fed back to the position shown in FIG. 1 (E) in preparation for recording the next second color.

At this time, by driving the platen roller l in the reverse direction while the head 30 remains lowered, the recording paper 62 and the roller 1 are
The recording paper 62 is fed backward using the friction between the two.

On the other hand, at this time, it would be a problem if the used ink paper portion wound around the winding core 24 is fed backwards, so the winding core 24 (take-up reel) is braked to prevent it from being reversed.

The above is the operating principle of the present invention.

[Embodiments of the invention]

The present invention will now be described in detail with reference to the drawings.

FIG. 2 is a schematic front view showing the configuration of a thermal transfer recording device as an embodiment of the present invention, mainly showing a conveying (reverse feeding) means;
2A and 2B are perspective views of an ink paper container used by being incorporated into the configuration shown in FIG. 2, and FIG. 2C is a sectional view taken along line A-A in FIG. 2, FIG. 3 is a schematic plan view showing the configuration of the main parts of a thermal transfer recording apparatus as an embodiment of the present invention.

First, please refer to FIGS. 2 and 3.

The platen roller I is made by molding an elastic body such as rubber into a cylindrical shape around a metal shaft 1a. The shaft 1a is rotatably supported by a bearing 4 attached to the substrate 3, and is further connected to a motor shaft 2a of a drive motor 2 coaxially attached to the substrate 3 so as to transmit rotation.

The board 3 has a shaft 5. A shaft 6 is installed, and a reel stand 7 for winding ink paper is installed. A feeding reel stand 8 is rotatably attached, and a required braking force is constantly applied to the reel stand 8 by a leaf spring 9 and a brake shoe 10.

The reel stand 7 is arranged between a gear pulley 11 rotatably disposed on the shaft 1a, a stopper 13 fixed to the shaft 1a, a felt washer 12 attached to the stopper 13, and the platen roller 1 and the gear pulley 11. It is driven by frictional rotation torque generated by a slip mechanism constituted by a spring 14.

Further, an arm 15 is rotatably attached to the shaft 1a, and a relay gear 17, which is rotatable around a bottle 160 and is implanted in the arm 15, is always engaged with the gear pulley 11, and is also connected to the gear portion 7a of the reel stand 7. Arranged so that it can be integrated.

Further, the arm 15 is secured by a stopper 19 attached to the shaft 1a, a felt washer 1B affixed thereto, and a spring 20 disposed between the arm 15 and the stopper 13. It is configured to be swingable around the shaft 1a.

Further, one end of the arm 15 has a claw portion 15a that can be engaged with the gear portion 7a of the reel stand 7.

FIGS. 2A and 2B are perspective views of ink paper cassettes that are incorporated into the configuration shown in FIG. 2, respectively. FIG. 2A shows a state without ink paper, and FIG. 2B shows a state with ink paper.

In these figures, the leading ends of the ink paper are fixed to the core so that the unused ink paper 22 is wound onto the core 24 and the used ink paper is wound around the core 23. On the other hand, the winding core 23
．． 24 is constructed so that when the cassette 21 is mounted on the device (FIG. 2), the cassette 21 is engaged with the reel stand 7° 8 through the holes 21b and 21C formed in the cassette 21 for rotational coupling. .

In addition, in the center between both volumes 8, there is an opening 21 that penetrates in the vertical direction.
a is formed. A thermal head 3 that can be switched in both forward and reverse directions is mounted on the board 3 via a bracket (not shown).
0 lift motor 25 is attached and the motor shaft 2
A worm 26 is fixed to 5a.

The drive arm 28 is rotatably supported on a shaft 27 implanted on the base plate 3, has a worm gear portion 28c, engages with the worm 26, and rotates the shaft 27 when the motor 25 rotates clockwise.
It is configured to rotate clockwise around , and counterclockwise when the motor 25 rotates in reverse.

A head arm 31 on which a thermal head 30 is mounted is rotatably attached to the shaft 27, and a spring 3
3 is also pivotally supported, and is mounted between a bottle 29 installed in the drive arm 28 and a bottle 32 installed in the door arm 31 so as to urge them apart.

Further, a pin 36 installed in the navel arm 31 is fitted into an elongated hole 28a formed on the drive arm 2, and in conjunction with a spring 33 in FIG. 2, regulates the relative position of the two.

A guide bin 37 for pre-recording ink paper is attached to the tip of the head arm 31.

Furthermore, an arm 39 having a guide bin 40 for used ink paper at its tip is rotatably supported around a shaft 38 implanted in the hendoor arm 31. Also arm 39
A spring 41 is stretched between the other end and the head arm 31 and is biased clockwise, but in FIG. 2, a portion 398 abuts against the thermal head 30 and its position is restricted.

A plate spring 42 is fixed to the lower part of the head arm 31 with a screw or the like, and in the state shown in FIG. 2, the temporary spring 42 is configured to press lightly against the paper guide wall 50. On the other hand, the drive arm 28 is connected by a rod 35 to a slide type changeover switch 34 having three positions.

Although the changeover switch 34 is not shown here, the motor 25
The rotation of the motor 25 driven by each operating motor is controlled by the statement signal of the designated position.

It is configured to be stopped when the switch is switched.

Reference numerals 50 to 54 are guide walls for conveying recording paper, and 51a is an insertion opening for recording paper canted to a predetermined length (cut paper). Ribs 50b and 51b are provided on both sides of the guide walls 50 and 51, respectively, and are configured to guide the paper in the width direction.

The reel stand 57 is rotatably supported by a shaft 56 installed on the substrate 3, and a recording paper wound in a roll is loaded onto the core, and the core and the reel stand 57 are integrated. (It is also possible to use such roll-shaped continuous recording paper without using cut paper.)
.

Furthermore, a leaf spring 58 is attached to the outer periphery of the reel stand 57. The required braking force is applied by the brake shoes 59. The opening 51c of the guide wall 51 is an insertion opening for roll recording paper when using roll recording paper instead of cut paper, and there is a space between the left side of the reel stand 57 and the guide wall 51d for recording paper that is fed backwards during recording. A space is provided that can accommodate recorded paper.

60 is a photosensor that detects the leading edge of the recording paper when it is guided around the roll 1;
1 is for entering into the cassette through a hole 21d drilled in the cassette and detecting the index 22a (Fig. 8) provided on the ink paper 22 when the ink paper power cent (Fig. 2B) is loaded. These sensors are attached to the board 3 via brackets, although none of them are specifically shown.

FIG. 8 is an explanatory diagram showing an example of the structure of the ink paper 22. As shown in FIG. The ink paper 22 is yellow Y and magenta Z.

Three colors of cyan C ink are applied onto the base film in a plane-sequential manner with dimensions slightly larger than the print width I7 of one screen, and a black index 22a is placed at the beginning of yellow Y. Between magenta Z and between magenta Z and cyan C, there are provided portions 22b and 22C of only the heath film to which no ink is applied.

Note that the locking portion 31a formed on the head arm 31 is fixed at a predetermined setting position of the cassette 21 in the state shown in FIGS. This is to prevent the cassette 21 from being removed from the cassette 21, and the locking portion 31a serves as a lid portion to cover a portion of the winding side of the cassette 21.

Note that FIG. 2C is a sectional view taken along A-AI in FIG. 2. By referring to FIG. 2C, the locking part 3
]a will cover a portion of the winding side of the cassette 21.

Next, the print recording operation will be described with reference to FIGS. 4 to 7, which are schematic front views for explaining the operation of an embodiment of the present invention.

When performing print recording, first the ink paper cassette 21 shown in FIG. 2i3 is loaded into the apparatus shown in FIG. 2, and the operation for positioning the first color ink paper at this time will be explained.

As shown in FIG. 4, first the cassette 21 containing the ink paper 22 is loaded onto the reel stands 7 and 8, respectively, with the cores 23 and 24.
Attach it so that it engages with the Although not shown at this time,
A cassette detection switch capable of detecting the presence or absence of the cassette 21 is provided on the board 3, and the switch is switched when the cassette 21 is attached.

Next, when the power button (not shown) is pressed, the cassette detection switch and the power switch are AND'ed, the motor 25 starts to drive counterclockwise, and the drive arm 28 turns the worm 2.
6. It begins to rotate counterclockwise by the worm gear portion 28c. As a result, the head arm 31 rotates counterclockwise integrally with the drive arm 28 via the torsion spring 33, so that the thermal head 30 eventually moves to the cassette 2.
1 into the cassette 21 through the opening 21a, the guide pin 37 goes to the ink paper 22, and the guide bottle 40 goes to the ink paper 22.
The platen roller 1 is brought into contact with the platen roller 1, and the spring 41 is further rotated counterclockwise around the shaft 38 while stretching the spring 41 to reach the state shown in FIG.

At this time, the changeover switch 34 is switched from the first position to the second position by the rotation of the rotation arm 28, and the rotation of the motor 25 is stopped by this signal. Here, the photo sensor 61 senses the index 22a of the ink paper 22, and if the index 22a is detected, the state shown in FIG. 5 is maintained, but if the index 22a is not present, the motor 25 further rotates counterclockwise. The head arm 31 is further rotated counterclockwise, and the thermal head 3o comes into contact with the platen roller 1 with the ink paper 22 in between.

As the rotation of the motor 25 progresses and the rotating arm 28 further rotates counterclockwise, the torsion spring 33 begins to flex under pressure from the pin 29, and the pin 36 no longer comes into contact with the elongated hole 28a, causing the torsion spring 33 to become attached to the pin. Press 32,
This causes the thermal head 30 to press the ink paper 22 and the platen roller 1.

At this point, the changeover switch 34 is switched to the third position, and the rotation of the motor 25 is stopped, resulting in the state shown in FIG. In response to a switching signal from the changeover switch 34, the motor 2 begins to drive clockwise in FIG. 2, and the platen roller 1 is rotated clockwise. As a result, the arm 15 swings its head clockwise in FIG. 2, and the relay gear 17 engages with the gear portion 7a of the reel stand 7 and rotates counterclockwise, causing the reel stand 7 to rotate clockwise. Receive drive.

As a result, the ink paper 22 is driven by the pressure of the platen roller 1 and the thermal head 30, overcoming the braking force of the reel stand 8, and is wound onto the reel stand 7.
1 detects the index 22a, the motor 25 is rotated clockwise and the pressure on the thermal head 30 is released.

At this time, the motor 2 continues to rotate clockwise, and the platen roller 1 and reel stand 7 are rotationally driven.
The winding torque is the rotational torque generated by the friction between the gear pulley 11 of the platen roller shaft 13 and the felt washer 12. Since the brake torque is set so that it always exceeds the winding torque of the reel stand 7, the reel stand 7 does not rotate after winding up the ink paper 22 that has become slack due to the retreat of the thermal head 30. 22 stops moving.

On the other hand, the clockwise rotation of the motor 25 is continued until the changeover switch 34 is switched from the third to the second position by the clockwise rotation of the rotary arm, and the rotation of the motor 2 is also stopped at the same time, as shown in FIG. Returning to the state, the operation of locating the beginning of the ink paper 22 is completed.

Next, loading the recording paper 62 will be explained.

In the state shown in FIG. 5, if cut paper is used, the paper is inserted through the insertion slot 51a, and when roll paper (continuous paper) is used, it is mounted on the reel stand 57 and the leading end of the paper is inserted through the insertion slot 51C. Furthermore, although not shown, when the paper feed operation button is pressed, the motor 2 starts to drive clockwise, and the platen roller 1 and reel stand 7 are simultaneously driven clockwise, but the ink paper 22 moves as described above. Since this is not possible, the reel stand 7 is stopped.

However, the ink paper 22 is always under tension between the reels due to the winding torque of the reel stand 7 and the braking of the reel stand 8.

On the other hand, if the recording paper 62 is a cut paper, it is guided by the guide wall 5 2 and the outer wall 21 e of the cassette 21 and descends until its leading edge comes into contact with the platen roller 1 .

In the case of roll paper, the leading edge passes through the insertion slot 51C and comes into contact with the platen roller 1, but due to the frictional force between the leading edge of the recording paper 62 and the platen roller 1, the leading edge of the recording paper 62 moves in the direction of rotation of the platen roller 1. Easily guided and tipped with ink paper 2
Beyond the point where 2 and platen roller 1 begin to make contact,
The recording paper 62 is driven in the rotational direction of the platen roller 1 due to the frictional force between the recording paper 62 and the platen roller 1 due to the tension of the ink paper 22 .

When the leading edge of the recording paper 62 reaches the position of the photosensor 60, the photosensor 6o detects the leading edge of the recording paper 62, and this signal causes the rotation of the motor 2 to stop and the loading operation of the recording paper 62 is completed. Here, if the outer wall 21e of the cassette is black and the recording paper is white, the photosensor 60 can easily detect the leading edge, and this signal is also connected to an indicator provided on the panel surface of the device (not shown). If you do so, you can display whether or not recording paper is loaded.Next, we will explain the printing operation. From the state shown in Figure 5, the copy button (
(not shown), the detection of the index 22a and recording paper 62 by the photosensors 61 and 60 is ANDed, the motor 25 is rotated counterclockwise, and the thermal head 30 is rotated against the platen roller 1. , the recording paper 62 and the ink paper 22 are stacked and pressed together.

At this time, when the changeover switch 34 is switched to the third position, the motor 25 is stopped, and the motor 2 is driven clockwise and energization to the thermal head 30 is started to perform the printing operation, resulting in the state shown in FIG. leading to. Here, the motor 2 may be driven intermittently by a stepping motor or continuously driven at a constant speed by a normal DC motor.
It is assumed that the energization pitch is synchronized with the amount of drive of the platen roller 1 by the motor 2.

At this time, the ink paper 22 and the recording paper 62 are transferred to the platen roller 1.
The used ink paper is sent in one piece at the guide pin 4.
The core 24 is separated from the recording paper 62 at
It is wound up. The braking force applied to the reel stand 8 is applied to the ink paper 22 as a tension to prevent wrinkles and skew. On the other hand, the recording paper 62 is inserted into the guide wall 5o and the cassette outer wall 21f, and further extends to the outside of the apparatus through guide walls 53 and 54.

When printing of a predetermined amount of the first color (yellow) is completed, the power to the thermal head 30 is cut off;
The conveyance of the recording paper 62 and the ink paper 22 by the pressure of 0 continues, and after the electricity is turned off, the ink paper 22 is fed by the length M,
When part b (FIG. 8) reaches the thermal head 30, the motor 25 is driven clockwise, the pressure on the thermal head 3o is released, the rotation of the motor 2 is stopped, and the ink paper 22 and recording paper 62 are It also stops the movement of.

This operation can be easily performed if the ink application length of the ink paper 22 is determined in advance and the above-mentioned switching is activated after a certain period of time set by a microcomputer or the like after the start of printing. At this time, it is assumed that all the recorded ink paper 22 passes through the guide pin 4o and is separated from the recording paper 62.

The motor 25 rotates clockwise until the selector switch 34 switches from the third position to the second position, reaching the state shown in FIG. 7, but the motor 2 is driven counterclockwise by the switching signal to the second position. be started.

In Fig. 2, when motor 2 rotates counterclockwise, arm 15
swings its head counterclockwise, the relay gear 17 is disengaged from the reel stand 7, and the claw portion 15a is moved to the reel stand 7.
(This can be said to be an important point regarding the present invention). On the other hand, recording paper 62 is ink paper 2
Since the platen 2 and the guide pin 40 are pressed together by the force of the spring 41, the frictional force acting between the guide pin 40 and the platen 1 causes reverse feeding. At this time, the ink paper 22 also tries to return due to the frictional force acting between the recording papers 62, but the reel stand 7
Since the movement of the ink paper 22 is stopped by the movement of the ink paper 22, the movement of the ink paper 22 is not performed. Therefore, only the recording paper 62 is transported backwards while sliding between the ink-free portion 22b of the ink paper 22 and the recording paper 62.

Here, it is also possible to use the thermal head 30 instead of the guide pin 40 as the reverse feeding means and apply a predetermined pressing force necessary for reverse feeding.

In the case of cut paper, the reversely fed recording paper 62 returns along the path formed by the guide wall 51 and the cassette outer wall 21e, and
In the case of roll paper, it passes through the insertion port 51C in the opposite direction, enters a space surrounded by a continuous wall 51d on the side of the reel stand 57, and is stored as shown in FIG.

Here, if motor 2 is a stepping motor, when the number of step knobs rotated clockwise from the start of printing is p,
When reversing, the rotation is stopped after feeding (p + q) steps, and in the case of a continuous feed motor, it has a built-in encoder that can measure the amount of rotation, and similarly measures the amount p of rotation clockwise from the start of printing, and then starts rotating in reverse. Sometimes the rotation is stopped after feeding by (p+q).

On the other hand, the motor 25 is driven counterclockwise by the rotation stop signal of the motor 2, and the crimping operation of the thermal head 30 is performed again. However, the motor 25 is stopped by the 5th position signal of the changeover switch, and the motor 2 Start driving in the direction. Here, when the rotation amount advances by q, energization to the thermal head 30 is started and printing of the second color (magenta) is performed, but the drive amount of the ink paper 22 by the rotation amount q of the motor 2 is set to N. 8, the relative position of the ink paper 22 and the thermal head 30 will be in the magenta region, as is clear from FIG.

Further, since the phase of the start of printing on the recording paper is adjusted only during clockwise rotation, it is possible to superimpose the printed dots on the recording paper with high precision. Thereafter, the third color cyan is printed in the same way, but after the printing of the third color is completed, the photosensor 61 detects the index 22a' and drives the motor 25 to release the thermal head 30 from the ink paper 22a'. is configured to stop the movement of the

On the other hand, the recording paper 62 continues to move outside the apparatus by being driven by the guide bin 40 and the platen roller 1. motor 25
The motor 2 returns to the state shown in FIG. 5 and stops, and the motor 2 stops after a predetermined time set so that at least the rear end of the guide bin 4 completes the copying operation in the case of cut paper. The operation (transcription recording) ends.

If copying is to be repeated thereafter, it is sufficient to simply press the copy button for roll paper, or for cut paper, it is sufficient to insert one sheet from the insertion slot 51a, perform a paper feeding operation, and then operate the copy button. Next, when all the copies are completed and a stop button (not shown) is pressed, the motor 25 is driven clockwise from the state shown in FIG. 5 and rotates until the changeover switch 34 is switched from the second position to the first position. .

As a result, the head arm 311 rotation arm 28 rotates clockwise to reach the state shown in FIG. 4, and the locking portion 31a of the head arm 31 releases the cover on the cassette 21, making it possible to replace the cassette 21. The leaf spring 42 attached to the rear end of the head arm 31 lightly presses the guide wall 50, so when the roll paper is loaded, it presses down the roll paper to prevent it from moving backwards into the inside of the device, and the ink Trouble when loading and unloading the paper cassette 21 can be avoided.

〔Effect of the invention〕

According to the present invention, color overlapping recording is possible without using a special drive means for reversely feeding the recording paper, by simply providing a means for prohibiting reverse feeding of ink paper in the conventional recording function. An extremely inexpensive thermal transfer recording (hard copy) device can be provided. Furthermore, if the pressure from the thermal head 30 is used instead of the pressure from the guide bin 40 to transport the recording paper by rotation of the platen roller, the same driving means is used to transport the recording paper in both forward and reverse directions. The drive was effective in preventing skewed running and enabled highly accurate print recording. Furthermore, even if a small-diameter roller is used, the recording paper can be wrapped (the angle can be set relatively large), making it possible to transport stiff cardboard.

[Brief explanation of drawings]

FIG. 1 is a detailed explanatory diagram of the present invention, FIG. 2 is a schematic front view showing the configuration of an embodiment of the present invention, and FIGS. 2A and 2B are incorporated into the configuration shown in FIG. 2. A perspective view of the ink paper cassette used in , Figure 2A shows the state without ink paper,
FIG. 2B shows the present state, respectively. 2C is a sectional view taken along the line A-A in FIG. 2, FIG. 3 is a schematic plan view showing the configuration of the main part of the embodiment of the present invention, and FIGS. FIG. 8 is a schematic front view for explaining the operation of one embodiment, and FIG. 8 is an explanatory diagram showing an example of the structure of ink paper. Description of symbols 1... platen roller, 1a... shaft, 2... motor, 2a... shaft, 3... board, 4... bearing, 5.
6... Axis, 7° 8... Reel stand, 7a... Gear part, 9... Leaf spring, 10... Brake shoe, 11...
...Gear pulley, 12...Felt washer, 13.
...Stopper, 14...Spring, 15...Arm, 1
5a...Claw portion, 16...Bin, 17...Relay gear, 18...Felt washer, 19...Stopper,
20...Spring, 21...Cassette, 22...
・Ink paper, 23.24... Core, 21a... Opening, 21b, 21cm hole, 25... Motor, 25 a
-...Axis, 26...Worm, 27...Axis, 28
...Arm, 28a...Elongated hole, 28G...Worm gear part, 29...Bin, 30...Thermal head, 31...Head arm, 31a...Locking part, 32
... Bin, 33... Spring, 34... Changeover switch, 35... Rod, 36... Bin, 37...
・Guide bin, 38...shaft, 39...arm, 40・
...Guide bin, 41...Spring, 42...Plate plate, 50-54...Guide wall, 51a...Insertion slot for recording paper (force/gutter paper), 51b, 51C... ·rib,
56... Axis, 57... Reel stand, 58... Leaf spring, 59... Brake shoe, 60.61... Sensor, 62... Recording paper agent, patent attorney Akio Namiki rrtg (4) 2nd AWJ 3B

Claims (1)

[Claims] 1) An ink paper made by applying thermal ink to a band-shaped film and a recording paper are stacked and pressed between a thermal head and a roller, and the roller is driven to rotate and the ink paper is wound. The ink paper and the recording paper are conveyed together by a predetermined length using the shaft drive to perform print recording, and in order to separate the ink paper and the recording paper after recording, the conveyance path of the ink paper is changed to the recording paper. In a thermal transfer recording device, the thermal transfer recording device is provided with a guide member bent and guided from the conveying path, and a roller pressing means for pressing the roller from above the ink paper through the ink paper and the recording paper, and a roller pressing means for pressing the roller from above the ink paper through the ink paper and the recording paper, and a roller pressing means for pressing the roller from above the ink paper through the ink paper and the recording paper; and control means for applying braking, and when the recording paper is transferred in the opposite direction by driving the roller in the reverse direction while being pressed by the roller pressing means, the ink paper winding shaft is braked by the braking means to prevent ink. A thermal transfer recording device characterized in that paper is not fed backwards. 2) A thermal transfer recording apparatus according to claim 1, wherein the roller pressing means comprises the thermal head. 3) A thermal transfer recording apparatus according to claim 1, wherein the roller pressing means is comprised of the guide member.