JPS615964A - Heat-transfer thermal recorder - Google Patents

Abstract

PURPOSE:To convey a recording paper fed to a printable position along a platen roller without use of a sprocket or the like, by winding an ink paper on a part of the circumference of the platen roller while being imparted with a tension. CONSTITUTION:Guide pins 37 and 40 are lowered to press an ink paper 22 against a roller 1, a recording paper 62 is inserted and a tension is applied between two rolls 23 and 24. A thermal head 30 is lowered to press the ink paper 22 and the recording paper 62 against the roller 1 and then, the roller 1 is rotated in the direction of the arrow to convey the ink paper 22 together with the recording paper 62.

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 thermal head from above to generate a photosensitive image. The present invention relates to a thermal transfer recording device that performs thermal transfer recording, and more specifically, it relates to a recording paper transport means for transporting recording paper to a predetermined recording start position in the recording device prior to the start of recording. The present invention also relates to a blocking means (cassette lock mechanism) for preventing access to an ink paper cassette loaded in a printing apparatus during a printing operation.

[Background of the invention]

Conventionally, thermal transfer onto recording paper has been carried out using ink paper made by coating a strip of film with thermal ink. A pin-feed conveying means is often used in which a recording paper having a series of holes is driven by engaging a sprocket provided on a platen roller with the holes.

However, since such a conveying means is equipped with a sprocket, the cost of the platen roller increases, and
Since the recording paper also has holes on both sides, it was necessary to cut the holes on both sides of the recording paper after printing depending on the purpose. In addition, as a conveying means that does not use sprockets, there is a means of chucking the raw recording paper in some way and conveying it in this way, but this has the disadvantage that the chuck mechanism is complicated and expensive. Although this method can be used for cut paper that is canted one by one, it cannot be applied to continuous roll paper.

Therefore, a conveying means that utilizes the friction between the recording paper and rollers has been proposed, but according to this means,
In particular, when using small-diameter rollers, which are advantageous in terms of cost and downsizing, to transport thick or large recording paper, the rigidity of the recording paper makes it difficult to wrap the recording paper around the roller, especially when recording Conveying the recording paper along the rollers to the thermal head section prior to the recording paper has drawbacks such as requiring a special guide member and severely restricting the conveyance path.

Next, a conventional technique related to a means (cassette lock mechanism) for preventing access during a recording operation to an ink paper cassette loaded in a thermal transfer recording apparatus or the like will be described.

Generally, VTRs, tape recorders, and the like are provided with a detachment prevention function that makes it impossible to attach or detach the cassette in order to protect the magnetic tape and the device inside the loaded cassette during recording and reproduction. Similarly, a thermal transfer recording device W (hard copy device) uses a cassette (ink paper cassette) in which a coloring medium such as an ink ribbon (ink paper) is fed out from a supply reel and wound onto a take-up reel. ) also requires a protective function to prevent attachment and detachment in order to protect the ink paper and equipment, but these protection mechanisms conventionally used in VTRs and tape recorders are either microcomputer controlled or mechanical. This is a special part that does not accept attachment/detachment operations, and has disadvantages such as complicated control, increased number of parts, and high cost. There were technical circumstances that made it impossible to apply.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned conventional technical circumstances and to overcome the drawbacks of the prior art.Therefore, the first object of the present invention is to reduce the cost and to reduce the cost of cut paper. To provide a thermal transfer recording device equipped with a recording paper transport amniotic membrane that can be applied to continuous paper as well as continuous paper, and even when relatively rigid thick paper is used as the recording paper.

A second object of the present invention is to provide a thermal transfer recording device equipped with a cassette locking mechanism that is easy to control, does not require special dedicated parts, and is inexpensive.

[Summary of the invention]

The outline of the first invention in this application is as follows.

In the first invention, in order to align the fed recording paper along the platen roller and convey it to the printing position on the thermal head, the ink paper loaded in the cassette is first loaded onto the platen roller. By wrapping the ink paper around part of its outer periphery, applying tension between the two reels that stretch the ink paper, and rotating the platen roller in the paper feeding direction, the point at which the recording paper begins to come into contact with the ink paper and the platen roller is set. The recording paper is inserted further into the recording paper and transported to a predetermined position by the driving force generated by the ink paper tension acting between the recording paper and the platen roller.

This will be explained in more detail with reference to FIG. FIG. 1 is a detailed explanatory diagram of the first invention in this application.

In the figure, 1 is a platen roller, 1 is a shaft, 22 is an ink paper made of a strip-shaped film coated with thermal ink, and 2
3.24 is a winding core, 30 is a thermal head, 37.40 is a guide pin each having a wheel attached to its tip, and 62 is a recording paper. The ink paper 22 is of a cassette type structure in which the ink paper 22 is wound around a core 23 (feed-out reel), is unwound, and then wound onto a core 24 (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 pins 37, 40 and the head 30 are located on the other side.

Next, the guide pins 37 and 40 descend, and as shown in FIG.
As shown in (b), the ink paper 22 is wound (pressed) around the roller 1 over a predetermined angular range θ (center angle) and loaded. 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 l
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.

In addition, 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 roller 1 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,
Normally, the relationship FB>FF holds true, and therefore the ink paper 22 is stationary. Even when this ink paper 22 is wound around the roller 1 and the recording paper 62 is transported as described above, F and F are determined so that the relationship Fly>FF is not broken. Because there are
Ink paper is not transported.

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 the roller 1 rotates in the direction of the arrow in this state, the above-mentioned relationship FIl>F breaks down and becomes FF>FB, so 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.

According to this conveyance means, since print recording (thermal transfer) is performed with the ink paper and the recording paper superimposed, other guide drive means (that is, drive means other than the means for rotationally driving the roller 1) are required. is not necessary at all. Furthermore, due to the principle of operation, the contact angle θ of the ink paper 22 with the roller 1 can be made small, so even if the diameter of the roller 1 is made small to reduce costs, the area where the recording paper 62 wraps around the roller 1 is large. Since the thickness is originally small, even if relatively thick paper is used as the recording paper 62, it will not be difficult to wrap the recording paper 62.

Next, the second invention in this application will be explained in detail.

In the second invention, a blocking member for blocking access to the ink paper cassette is integrally provided on the arm on which the thermal head is mounted, and the head is driven by the arm to the recording position (FIG. 1 (D)). ), a blocking member linked to the arm covers the ink paper cassette to prevent access to the cassette, and when the head has left the recording position due to the return of the arm, the arm An interlockingly moving blocking member releases the cover of the ink paper cassette.

[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 including a conveying means, and FIGS. 2A and 2B are assembled into the configuration shown in FIG. 2. FIG. 2C is a sectional view taken along the line A-A in FIG. 2, and FIG. 3 is a perspective view of an ink paper cassette that is used as an ink paper cassette. FIG. FIG.

First, please refer to FIGS. 2 and 3.

The platen roller 1 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 the reel stand 8 is always provided with the required play force 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 affixed to the stopper 13, and the platen roller 1 and the gear boo IJ11. spring 14
It is driven by the frictional rotation torque generated by the slip mechanism configured by.

Further, an arm 15 is rotatably attached to the shaft 1a LJ, and a relay gear 17 rotatable around a pin 16 implanted in the arm 15 is always engaged with the gear pulley 11.
Furthermore, it is arranged so as to be able to be engaged with the gear portion 7a of the reel stand 7.

Further, the arm 15 is compressed by a stopper 19 fixed to the shaft 1a, a felt washer 18 attached to this, 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 zero cassette 21 is installed in the device (FIG. 2), it is engaged and rotationally coupled with the reel stand 7° 8 through holes 21b and 21C formed in the cassette 21, respectively. .

In addition, there is an opening 21 that penetrates in the vertical direction in the center between the two winding cores.
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 to the remoter 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 pin 29 implanted in the drive arm 28 and a pin 32 implanted in the head arm 31 so as to bias them in the direction of separation.

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

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

Furthermore, around the shaft 38 implanted in the head arm 31,
An arm 39 having a used ink paper guide pin 40 at its tip is rotatably supported. Further, a spring 41 is stretched between the other end of the arm 39 and the navel arm 31 and is biased clockwise, but in FIG.

A plate spring 42 is fixed to the lower part of the head arm 31 with screws or the like, and is configured so that the plate spring 42 lightly presses against the paper guide wall 50 in the state shown in FIG. 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, it is connected to the drive circuit of the motor 25, and the switch 34 is switched in response to a statement signal of a motor which specifies the rotation of the motor 25 driven by each operation mode. It is configured to be stopped depending on the situation.

Reference numerals 50 to 54 are guide walls for conveying the recording paper, and 51a is a guide wall for inserting the recording paper (cut paper) which has been canted to a predetermined length. 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. (This means that roll-shaped continuous recording paper like this can also be used without using cut paper.)
.

Furthermore, a plate 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 a roll of recording paper instead of cut paper, and there is a space between the left site 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;
A sensor 1 enters into the cassette through a hole 21d formed in the cassette and detects an index 22a (Fig. 8) provided on the ink paper 22 when the ink paper cassette (Fig. 2B) is loaded. Both are attached to the board 3 via brackets, although not specifically shown.

FIG. 8 is an explanatory diagram showing an example of the structure of the ink paper 22. As shown in FIG. In the figure, the ink paper 22 is yellow Y.

Three colors of ink, magenta Z and cyan C, are applied onto the hearth film in a plane-by-plane manner with dimensions slightly larger than the print width of one screen, and a black index 22a is also placed at the beginning of yellow Y. Between yellow Y and magenta Z, and between magenta Z and cyan C, there are provided portions 22b and 22C, which are only coated with hess film and are not coated with ink.

Note that the locking portion 31a formed on the head arm 31 locks the cassette 21 at a predetermined center when the head arm 31 and the thermal head 30 are in the state shown in FIGS. This is to prevent the cassette from being taken out from the position, and the locking part 31a is configured to act as a lid part and cover a part of the winding side of the cassette 21.

Note that FIG. 2C is a sectional view taken along line A-A in FIG. 2. By referring to FIG. 2c, it will be understood that the locking portion 3]a covers 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. 2B 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, the cassette 21 containing the ink paper 22 is first placed on the reel stand 7.
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 ANDed, the motor 25 starts to drive counterclockwise, and the drive arm 28 moves to the war L2.
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 the thermal head 3o eventually enters the cassette 21 through the opening 2]a of the cassette 21, The guide pin 37 is attached to the ink paper 22, and the guide pin 4o is attached to the ink paper 2.
2 and comes into contact with the platen roller 1, and further rotates 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 further rotates counterclockwise, and the thermal head 3o does not come into contact with the platen roller 1 with the ink paper 22 in between, but the motor 25
As the rotation progresses and the rotating arm 28 further rotates counterclockwise, the torsion spring 33 begins to deflect under pressure from the pin 29, and the pin 36 no longer contacts the elongated hole 28a, causing the torsion spring 33 to push the pin 32. Therefore, the thermal head 30 presses the ink paper 22 and the platen roller l.

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 starts to rotate counterclockwise, so the reel stand 7 is driven to rotate clockwise. receive.

As a result, the ink paper 22 is driven by the pressure of the platen roller 1 and the thermal gutter 30, overcoming the braking force of the reel stand 8, and is wound onto the reel stand 7, but if the photo sensor 61 detects the index 22a , the motor 25 is rotated clockwise and the pressure on the thermal head 3o 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 and the felt washer 12 on the platen roller shaft 1a, and the reel stand 8 on the feeding side is constantly being braked by the brake shoe 10. 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 continues until the changeover switch 34 is switched from the third position to the second position by the clockwise rotation of the rotary arm, and the rotation of the motor 25 also stops at the same time and returns to the fifth position. Returning to the state shown in the figure, 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 edge of the paper is inserted through the insertion slot 51c. Furthermore, when the paper feed operation button (not shown) 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 cannot be moved as described above. Since then, the reel stand 7 has stopped.

However, the ink paper 22 is always in a state where tension is applied 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 51 and the outer wall 2 ]e of the cassette 21 and landed, and the leading edge of the recording paper 62 eventually 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 frictional force between the recording paper 62 and the platen roller 1 due to the tension of the ink paper 22 drives the recording paper 62 in the direction of rotation of the platen roller.

When the leading edge of the recording paper 62 reaches the position of the photosensor 60, the photosensor 60 detects the leading edge of the recording paper 62.

The rotation of the motor 2 is stopped in response to this signal, and the loading operation of the recording paper 62 is completed. Here, the outer wall 21 of the cassette
If e is black and the recording paper is white, the photosensor 60 can easily detect the leading edge, and this signal can also be connected to an indicator provided on the panel surface of a device (not shown). It is also possible to display whether or not recording paper is loaded.

Next, the printing operation will be explained. When the copy button (not shown) is pressed from the state of the fifth threshold, the previous photo sensor 61.6 is
The motor 25 is rotated counterclockwise by ANDing the detection of the index 22a and the recording paper 62 by 0, and
The thermal head 3° pinches and presses the recording paper 62 and the ink paper 22 in a stacked manner against the platen roller l.

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 3° is started to perform the printing operation, as shown in FIG. reach the state. Here, the motor 2 can be driven intermittently by a stepping motor or can be driven by normal DCC.
Constant speed continuous drive by morph is also acceptable, thermal head 3o
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 bin 4.
The core 24 is separated from the recording paper 62 at the reel stand 7.
It is wound up. The braking force applied to the reel stand 8 is applied to the ink paper 22 as hack tension to prevent wrinkles and skew. On the other hand, the recording paper 62 is guided by the guide wall 5o and the cassette outer wall 21f, and further by the guide wall 5o.
3.54 leads to the outside of the device.

When printing of a predetermined amount of the first color (yellow) is completed, the IL power to the thermal head 30 is cut off, but the thermal head 3
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 30 is released, the rotation of the motor 2 is stopped, and the ink paper 22 and recording paper 62 are removed. 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 40 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. When the motor 2 is started and rotates counterclockwise in Fig. 2, the arm 15
swings its head counterclockwise, the relay gear 17 is released from the reel stand 7, and the claw portion 15a is moved to the reel stand 7.
The gear part 7a is engaged with the gear part 7a.

On the other hand, since the recording paper 62 is pressed together with the ink paper 22 by the force of the spring 41 of the guide bottle 40, it starts to be fed backwards due to the frictional force acting between it and the platen 1. At this time, the ink paper 22 also tries to return due to the frictional force acting between the recording papers 62, but since the reel stand 7 is stopped by the aforementioned claw portion 15a, the ink paper 22 does not move.
Only the recording paper 62 is sent backwards while sliding between the second ink-free area 22b and the recording paper 62.

Here, it is also possible to use the thermal head 30 instead of the guide bin 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 570, and is stored as shown in FIG.

Here, if the motor 2 is a stamping motor, when p is the number of steps rotated clockwise from the start of printing,
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 thermal hood 30 is crimped again. However, the motor 25 is stopped by the third position signal of the changeover switch, and the motor 2 is turned clockwise. Start driving in the direction. Here, if the rotation amount advances by q, the thermal head 3
0 starts, and printing of the second color (magenta) is performed, but if the amount of drive of the ink paper 22 by the rotation amount q of the motor 2 is set to N, the ink paper 22 and the thermal head 30 As is clear from FIG. 8, the relative position of is in the magenta region.

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
returns to the state shown in FIG. 5 and stops, and in the case of cut paper, the motor 2 stops after a predetermined time set so that at least the trailing edge completes the driving by the guide bin 40, and the copying (transfer recording) is performed. The operation 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 312 rotation arm 28 rotates clockwise to reach the state shown in FIG. 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 holds down the roll paper and prevents it from moving backwards into the inside of the device. , troubles when loading and unloading the ink paper cassette 21 can be avoided.

〔Effect of the invention〕

As explained above, according to the first invention,
/ It is possible to provide a device with an extremely inexpensive configuration that allows fed recording paper to be conveyed along a platen roller to a printable position without using a paper chuck mechanism. In addition, because of the guiding effect of the ink paper, the leading edge of the recording paper does not come into contact with other guiding members or thermal heads, etc., which prevents conveyance, and the amount of wrapping of the recording paper around the platen roller can be adjusted to the required amount during recording. This is possible within a minimum range, and has great effects such as making it possible to use stiff cardboard for small diameter rollers.

Furthermore, according to the second invention, by driving the thermal head driving arm, it is possible to prevent the ink paper cassette from being attached or detached from a predetermined cent position during recording, etc., so that a special mechanical part is provided. Alternatively, there is no need for complicated microcomputer control, and thermal transfer recording can be performed with simple control (hard copy).
This has the advantage that the device can be provided at a low price.

[Brief explanation of drawings]

FIG. 1 is a detailed explanatory diagram of the first invention, FIG. 2 is a schematic front view showing the configuration of an embodiment of the present invention, and FIGS. 2A and 2B are inside the configuration shown in FIG. A perspective view of an ink paper cassette that is incorporated and used, FIG. 2A shows a state without ink paper, FIG. 2B shows a state with ink paper, and FIG. 2C is a sectional view taken along mA-A in FIG. 2. , FIG. 3 is a schematic plan view showing the configuration of essential parts of an embodiment of the present invention, FIGS. 4 to 7 are schematic front views for explaining the operation of an embodiment of the present invention, and FIG. 8 is an explanatory diagram showing an example of the structure of ink paper. Description of symbols 1... platen roller, la... shaft, 2... motor, 2a... shaft, 3... board, 4... bearing, 5.
6... Axis, 7° 8... Reel stand, 7a... Gear part, 9... Temporary spring, 1°... Brake shoe, 11.
...Gear pulley, 12...Felt washer, 13.
...Stopper, 14...Spring, 15...Arm, 1
5a...Claw portion, 16...Bin, 17.P relay gear,
1...Felt unit +, 19...Stopper, 20
... Spring, 21 ... Cassette, 22 ... Ink paper, 23.24 ... Core, 21a ... Opening, 2
1b, 21C-=・hole, 25-・motor, 25 a
-...Axis, 26...Worm, 27...Axis, 28...
...Arm, 28a...Elongated hole, 28C...Worm gear part, 29...Bin, 30...Thermal navel F,
31... Head arm, 31a... Locking part, 32...
... Bin, 33... Spring, 34... Selector switch, 35... Rondo, 36... Bin, 37...
Guide bin, 38...shaft, 39...arm, 40...
- Guide bin, 41... Spring, 42... Leaf spring, 50-54... Guide wall, 51a... Recording paper (cut paper) insertion slot, 51b, 51c... Rib, 56.
...Axis, 57...Reel stand, 58 River leaf spring, 59...
・Brake shoe, 60.61...Sensor, 62...
・Record paper agent Patent attorney Akio Namiki No. 111! 1 (4) (c) 1 unit) (2) Wi2 Figure 2A Figure 1a

Claims (1)

[Scope of Claims] 1) An ink paper cassette in which ink paper made by applying thermal ink to a band-shaped film is fed out from a supply reel and wound onto a take-up reel, and a supply reel and a take-up reel in the cassette. A roller and a thermal head are arranged with an ink paper stretched between them, and the thermal head presses or presses the recording paper interposed between the ink paper and the roller through the ink paper. In a thermal transfer recording device that performs print recording by applying a force to the ink paper stretched between the supply reel and the take-up reel in the cassette, a force is applied from the thermal head side or the roller side. an ink paper loading means for loading the ink paper by winding it around the roller over a predetermined angular range; A conveyance driving means for conveying the recording paper to the recording start position, and a brake force acting on the supply reel and a take-up reel so that the recording paper is conveyed with the rotation of the roller during the conveyance, but the ink paper does not move and is conveyed. 1. A thermal transfer recording device comprising: means for maintaining a relationship with a tensile force acting on a thermal transfer recording device. 2) An ink paper cassette in which ink paper made by applying thermal ink to a band-shaped film is fed out from a supply reel and wound onto a take-up reel, and an ink stretched between the supply reel and the take-up reel in the cassette. It has a roller and a thermal head arranged with paper in between, and the thermal head presses or is pressed against the recording paper interposed between the ink paper and the roller, so that printing is recorded. In the thermal transfer recording device, a blocking member for blocking access to the ink paper cassette is integrally provided with a supporting member of the thermal head, and the supporting member allows the thermal head to be positioned at a pressing position with respect to the recording paper. When the thermosensitive head is brought to the ink paper cassette, the blocking member moves to a position where it blocks access to the ink paper cassette, and when the thermal head is returned from the pressed position to the original position by the supporting member, A thermal transfer recording apparatus characterized in that, in conjunction with this, the blocking member moves from a position blocking access to the ink paper cassette to a position not blocking access.