JPH0386567A - Printer device - Google Patents

Abstract

PURPOSE:To absorb the slack of recording paper to obtain a high-image quality transfer recording without registration by a method wherein the recording paper is securedly hung and wound on a platen roller before a recording paper feed mechanism starts recording, and the recording is always started from a constant position. CONSTITUTION:The number of pulses of an encoder 20 at the start of transfer recording is N=N2+N3 (a set value). A failure in keeping this value constant causes registration in a plurality of times of transfer recording. Therefore, at the start of transfer recording, corresponding to variations N21, N22,... in the value N, the value N3 is corrected to be N31, N32,..., respectively. In this correction, a storage device is provided in a printer device 1, and a positional signal (the number of y pulses for N2+N3) for a platen roller 2 at the start of recording is preset in the storage device to be compared with a positional signal (the number of Y pulses for N2) for the platen roller 2 at the detection of the leading end of recording paper 4 by a leasing end detector 23. After the recording paper 4 is hung, the platen roller 2 is rotated by the difference (N3), and a transfer recording is started. As a result, the recording can be always applied at a constant position.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a printer device, and particularly to a recording paper feeding mechanism.

(Prior art) In recent years, in the field of color printing and recording, high-resolution, multi-IW
It is well known that thermal transfer printers are widely used as printers that are flexible and easy to handle.

Recording paper feed for this type of printer device! A platen roller that winds recording paper and drives it to rotate,
A conventional printer device that is equipped with a pinch roller that can freely approach and separate from a platen roller and that presses the recording paper, and a thermal head, and that records by transporting the recording paper in the forward and reverse directions, is described in the ninth example.
This will be explained with reference to FIGS.

FIG. 9 is a configuration diagram of a conventional printer device, and is a diagram showing an initial state.

In FIG. 9, approximately in the center of the printer device 1, a platen roller 2 made of an elastic body is driven by a motor (not shown) in forward and reverse directions (directions of arrows AI and A2) around a rotating shaft 3.
The recording paper 4 is wound around the recording paper 4 so that the recording paper 4 can be wound around the recording paper 4 and the recording paper 4 can be wound around the recording paper 4 . A thermal head 5 is placed on the lower part of the periphery of the platen roller 2, and a pinch roller 6 is placed on the right side of the periphery of the platen roller 2. A driving mechanism such as a motor or a solenoid (not shown) is used to press the recording paper 4 against the platen roller 2 or to separate it from the platen roller 2, respectively. It has a structure that allows it to be moved. The recording paper 4 on this platen roller 2 and the thermal head 5
The transfer paper 7 that is supplied in between contains ink of multiple colors such as yellow, magenta, cyan, and black.
Further, the transfer paper 7 is passed between a supply bobbin 8 and a take-up bobbin 9 via a guide roller 10, and is engaged with a motor (not shown) to travel in the direction of arrow B.

At the top of the printer device 1, a paper feed cassette 11 containing recording paper 4 and a paper ejection cassette 12 containing recorded recording paper 4a are held in a structure that allows them to be attached and detached at appropriate inclination angles. There is. Furthermore, paper feed cassette 11
Near the paper feed cassette 12, a paper feed roller 13 is rotated by a motor (not shown) and has a structure that presses against and/or separates from the recording paper 4. On the other hand, near the paper ejection cassette 12, a paper feed roller 13 is driven to rotate by a motor (not shown). A driven paper ejection roller 14 and a sub-roller 15 that presses against or separates from the paper ejection roller 14 are provided.

Next, the recording operation on the recording paper 4 of the conventional printer device having the above-described configuration will be described.

FIG. 10 is a diagram showing the state during transfer recording, FIG. 11 is a diagram showing the state of returning recording paper, and FIG. 12 is an operation flow diagram.

In Figures 10 and 12, when a start command is issued,
Each part in the printer device 1 is initialized, and the paper feed roller 13 is brought into pressure contact with the uppermost layer of recording paper 4 of the paper feed cassette 11 and is driven to rotate, and pinched with the platen roller 2 along between the paper guides 16a and 16b. It is sent between rollers 6 and 6. At this time, the platen roller 2 is kept in a stopped state (steps 100 to 103), and the recording paper 4 is held by the pinch roller 6.
After passing through the pressure contact point, the pinch roller 6 comes into pressure contact with the grating roller 2. Then, after pressing the recording paper 4,
Separate the paper feed roller 13 from the recording paper 4 (step 1)
04 to 106), then the platen roller 2 is rotated in the forward direction (arrow A1 direction), and the recording paper 4 is transferred between the platen roller 2 and the transfer paper 7 (step 107).

Here, the thermal head 5 which had been separated from the platen roller 2 is brought into pressure contact with the platen roller 2, and a recording signal is applied to the thermal head 5 while simultaneously feeding the recording paper 4 and the transfer paper 7 by the pressing force at that time. , perform transcription recording (
Step 108).

Then, the recorded transfer paper 7 is sent toward the winding-side bobbin 9 and wound up, while the recorded recording paper 4a is transported along the paper guide 17 to the paper ejection roller 14 side, and the first color ( For example, the transfer recording of (yellow) is completed (step 109). At this time, the platen roller 2 is stopped while the rear end of the recording paper 4 is held in pressure contact between the gratin roller 2 and the pinch roller 6, and the transfer recording of -color is completed (step 109). is set to end.

FIG. 11 is a diagram showing a state in which the first color transfer recording is completed and the recording paper 4 is sent to the return transport path, in which the thermal head 5 is separated from the platen roller 2 by the transfer recording end signal (step 109), and then The platen roller 2 rotates in the opposite direction (arrow A2 direction), and the recording paper 4 is sent in the return direction by the platen roller 2 and the pinch roller 6 at a speed several times faster than the rotational speed during recording (step 112).
.

Note that the paper guide 18a is rotatable in the directions of arrows C1 and C2 by a drive mechanism such as a motor or solenoid (not shown), and is rotated in the direction of arrow C2 to form a return transport path for the recording paper (step 111); The rear end of the recording paper 4 is located between the paper guides 16a and 16b, and the paper guide 18
a and 18b, and is sent to the rear side of the paper ejection cassette 12, so that the leading edge of the recording paper 4 touches the platen roller 2.
A return stop signal is issued before the platen roller 2 comes out of the pinch roller 6, and the platen roller 2 stops (step 113).

As described above, since the transfer paper is formed from a plurality of colors, transfer recording is performed a plurality of times (n times) by repeating the above steps. However, the paper feed roller 13 for the second and subsequent colors proceeds to the operation flow in which it does not operate, and when the transfer recording of the last color (for example, the fourth color, black) is completed, the thermal head 5 separates from the platen roller 2. stops (step 109).Then, the paper ejection roller 14 and the sub roller 15 press and hold the recorded recording paper 4a and rotate to move the recorded recording paper 4a to the paper guide 17.
The paper is stored in the paper ejection cassette 12 along the direction. Note that when the recorded recording paper 4a is pressed and held between the paper discharge roller 14 and the sub roller 15, the pinch roller 6 also separates from the platen roller 2 (steps 114 to 117).

When the recorded recording paper 4a is stored in the paper ejection cassette 12 according to the above operation flow, the printer device 1 enters the initial state shown in FIG. 9, and waits for a command to start the next recording paper 4 (step 118). , 119°100).

FIG. 13 is a perspective view of the platen roller 2. At the end of the rotating shaft 3 of the platen roller 2, there is a detector 20 (hereinafter referred to as encoder 20) that detects the position of the platen roller 2.
are integrally connected by a coupling 19. The encoder 20 generates a plurality of pulses, for example, one pulse per revolution (Z pulse) and 15 pulses per revolution.
Generates a pulse such as 00 pulses (Y pulse). Among these pulses, the Z pulse serves as a reference pulse, and by adding or subtracting the Y pulse based on these two pulses, a detection signal for the position of the platen roller 2, a sea fence signal for the operation flow, etc. are generated. Note that when the platen roller 2 is stopped before transfer recording, the position signal of the encoder 20 (N = number of Y pulses of the encoder 20) is normally based on the Z pulse, and N = the number of NO pulses (initial position ) is set. Then, transfer recording is started when the number of pulses is N=N1.

In addition, by some means, the encoder 2
It is also possible to set a transfer recording start pulse number of 0.

(Problem U to be solved by the invention) By the way, in the above-mentioned printer device, the recording paper 4 is always held under pressure by the platen roller 2 and the pinch roller 6 during a plurality of repetitive operation flows, and is transported back and forth a plurality of times. . Moreover, in order to shorten the fence time of the entire operation flow, the platen roller 2 is rotated at a speed several times faster than during transfer recording when the recording paper 4 is returned. Therefore, variations in the load on the drive section of the grating roller 2 cause uneven feeding of the recording paper 4. Furthermore, the straightness of the platen roller 2 and pinch roller 6.

Due to the cylindrical curvature, the recording paper 4 is likely to be misaligned during reciprocation, and the recording paper 4 may also be misaligned from side to side due to the frictional load of paper guides on the transport path.

Furthermore, the recording paper 4 may not be reliably wound around the platen roller 2, and transfer recording may be performed with a small amount of slack.

For these reasons, misalignment of print recording positions of multiple colors (hereinafter referred to as registration) occurs, which is an important characteristic of the printer device 1. As a result, the printing quality is extremely degraded, and the printing quality changes each time transfer recording is performed, resulting in a problem that the reliability of the apparatus is also reduced.

For this reason, it is necessary to make the straightness and cylindricity of the platen roller 2 and pinch roller 6 highly accurate, but since these are made of elastic materials, it is technically very difficult to do so due to deformation during processing. This also brings about the problem of a significant drop in productivity.

(Means for Solving the Problems) The present invention has been developed in view of the above problems, and includes a platen roller that winds and rotates recording paper, and a transfer paper and the recording paper that are connected to the platen roller. A printer device comprising: a thermal head that presses the recording paper; and a pinch roller that presses the recording paper against the platen roller; A back roller that clamps the recording paper is provided on the side where the recording paper is supplied with respect to the pressure contact point with the platen roller, and during recording, the recording paper fed onto the platen roller is The thermal head is stretched between the thermal head pressed against the platen roller and the rotating back roller.

It also includes a platen roller that winds and rotationally drives recording paper, a thermal head that presses the recording paper against the platen roller via the transfer paper and the recording paper, and a pinch roller that presses the recording paper against the platen roller. A printer device for recording by transporting the recording paper in forward and reverse directions together with a platen roller, the printer device comprising a detector for detecting the position of the platen roller and a storage device for storing the signal of the detector. A front end detector for detecting the leading edge of the supplied recording paper and the pinch roller are respectively provided on the pressure contact point of the thermal head, and on the side from the pressure contact point of the pinch roller to which the recording paper is supplied. , a back roller is provided to sandwich the recording paper, and the recording paper fed onto the platen roller is stretched between the thermal head pressed against the platen roller and the rotating back roller; During recording, a recording start position signal of the platen roller stored in advance in the storage device and a position signal of the platen roller by the detector when the leading edge of the recording paper is detected by the leading edge detector are detected. By comparison, the recording start position of the platen roller is set.

It further includes a platen roller that winds and rotationally drives a recording paper, a thermal head that presses against the platen roller via a transfer paper and the recording paper, and a pinch roller that presses the recording paper against the platen roller. A printer device that transports the recording paper in forward and reverse directions together with a platen roller for recording, the printer comprising: a leading edge catcher that clamps the leading edge of the supplied recording paper at a pressure contact point between the platen roller and the thermal head; Pinch rollers are respectively provided, and the leading edge of the recording paper transferred by the pinch rollers pressed against the platen roller is held by the leading edge catcher, and the platen roller is rotated in the opposite direction in advance during recording; The present invention provides a printer device in which the recording paper is stretched between the tip catcher and the pinch roller pressure contact point.

(Embodiment) An embodiment of the present invention will be described in detail below with reference to FIGS. 1 to 8. Note that the same reference numerals are given to the same components as those of the conventional example, and detailed explanation thereof will be omitted.

FIG. 1 is a configuration diagram of a printer device according to a first embodiment of the present invention (
(A diagram showing an initial state).

In FIG. 1, the recording paper 4 is placed downstream of the pressure contact point between the platen roller 2 and the pinch roller 6 and upstream of the pressure contact point between the platen roller 2 and the thermal head 5 (the opening where the recording paper 4 is fed). A stopper 21 that can move forward and backward is provided so that its tip can be supported. This stopper 21 is attached parallel to the axial direction of the platen roller 2 and the pinch roller 6. The tip of the stopper 21 is made of #l structure that can be moved by a drive mechanism such as a motor or solenoid (not shown) between a position just before approaching the platen roller 2 and a position sufficiently avoiding the transport path of the recording paper 4. It has become.

Furthermore, a side edge position adjustment mechanism 22 is provided upstream of the stopper 21 (near the pinch roller 6) to align the side edges of the recording paper 4.

FIG. 5 is a perspective view of the side end position regulating mechanism 22 of the present invention. a end position regulation m treetop 22, paper guides 16a and 1
A fixing plate 22a is provided on one side of the recording paper 6b, and a horizontal alignment arm 22b capable of pressing the other side of the recording paper 4 against the fixing plate 22a is provided on the other side. Horizontal alignment arm 22b
can protrude in the direction of arrow D1 and press against the recording paper 4, or can be avoided in the direction of arrow D2, and is rotated by a drive mechanism such as a motor or solenoid (not shown).

Further, downstream of the pressure contact point of the thermal head 5, a leading edge detector 23, such as a photo sensor, for detecting the leading edge of the recording paper 4 is provided. Also, a back roller 2 that can press against or separate from the recording paper 4 upstream of the pressure contact point of the pinch roller 6
4 are pressed into contact with each other or separated by a motor drive mechanism (not shown), and the back roller 24 is configured to be rotatably driven. The back roller 24 is composed of a pair of rollers 24a and 24b, but for example, only the back roller 24a may be used for the transfer recording side of the recording paper 4, and the other may be replaced by the paper guide 16b.

FIG. 6 is a perspective view of the paper ejection cassette 12 of the present invention. The paper ejection cassette 12 is covered with a flat plate 12b that is integrally provided with the paper ejection cassette 12 along its back surface 12a.

Furthermore, the end of the flat plate 12b of the paper ejection cassette 12 forms a manual insertion slot 12c into which manually fed recording paper 4 can be inserted. The other end of the flat plate 12b is connected to the recording paper 4.
The insertion opening 12d is formed so that the paper can be smoothly transferred through the paper guide 18a.

Next, the recording operation on the recording paper 4 of the printer device according to the first embodiment of the present invention having the above-described configuration will be described. Note that the same operations as in the conventional example will be briefly described.

FIG. 2 is a diagram showing the state of return transport of recording paper according to the first embodiment of the present invention, FIG. 3 is a main operation flow diagram of the present invention, and FIG. 4 is a subroutine operation flow diagram of the first embodiment of the present invention. It is a diagram.

In FIGS. 1, 3, and 4, the paper feed roller 13
The recording paper 4 fed from the paper guides 16a and 16
The leading edge of the recording paper 4 contacts the stopper 21 (steps 100 to 103.200>, at this time the stopper 21 approaches the platen roller 2). It is on the verge of becoming.

When the recording paper 4 comes into contact with the stopper 21, the paper feed roller 13
is separated from the recording paper 4 (step 202), as a result, the recording paper 4 becomes free, and the leading edge of the recording paper 4 becomes
The recording paper 4 is supported by the stopper 21 by its own weight (step 203).

Here, the horizontal alignment arm 22b of the side end position regulation Il structure 22
is projected in the direction of arrow D1, the side edges of the recording paper 4 are aligned, and the leading edge is positioned by the stopper 21 (steps 203, 204).

In this state, the recording paper 4 is securely pressed against the platen roller 2 by the pinch roller 6, and then the tip of the stopper 21 is moved to a position where it can be sufficiently avoided from the transport path of the recording paper 4.
At the same time, the horizontal alignment arm 22b is moved away from the recording paper 4 in the direction of arrow D2 (steps 205, 206>).

Thereafter, the subroutine operation flow of the recording paper tensioner SUB (step 300) shown in FIG. 4 is entered.

Since the stopper 21 and the horizontal alignment arm 22b are avoided, the platen roller 2 is rotated in the forward direction (step 301), and the recording paper 4 is transferred to the leading edge detector 23.
When reaching the position, stop the platen roller 2,
The thermal head 5 is pressed against the platen roller 2 to press and hold the recording paper 4, and then the pinch roller 6 is separated (
In steps 302 and 303), the number of pulses of the encoder 20 when the leading edge of the recording paper 4 is detected is N=N2 (variation value).

After that, the back roller 24 is pressed against the recording paper 4, and
The back rollers 24a, 24b rotate the recording paper 4 in the direction opposite to the paper feeding direction and slightly back to absorb the slack in the recording paper 4, and then the back rollers 24a, 24b rotate.
(Steps 304 and 305>).

As a result, the pressure contact point of the thermal head 5 and the back roller 2
The recording paper 4 is stretched between the pressure contact points 4.

Note that the clamping force of the back rollers 24a, 24b is biased weaker than that of the thermal head 5, so even if the back rollers 24a', 24b rotate too much, the relative positional deviation between the platen roller 2 and the recording paper 4 will not occur. Does not occur.

In this way, the recording paper 4 is securely wrapped and stretched around the platen roller 2, and the pinch roller 6 securely presses and pinches the recording paper 4, and then the back roller 24 is separated by the recording paper 4. Then, rotate the platen roller 2 in the forward direction. And the number of pulses of the encoder 20 is N
=N2+N3 (set value), the transfer recording of the negative color starts (steps 306 to 310), and the subroutine operation flow of the recording paper tension rack SUB (step 30o) ends here, returning to the main operation flow. .

- After the color transfer recording is completed, the platen roller 2 is stopped and the thermal head 5 is separated (step 209);
Then, as shown in FIG. 2, the paper guide 18a is rotated in the direction of arrow C2 to reverse the grating roller 2 (steps 211, 212>).

After that, what is different from the conventional example is the paper guide 18a between the paper guides 16a and 16b on the return transport path.

The recording paper 4 is fed along between the back surface 12a and the flat plate 12b of the paper ejection cassette 12. Further, when the leading edge of the recording paper 4 passes the stopper 21 and the number of pulses of the encoder 20 reaches a predetermined number, the rotation of the platen roller 2 is stopped (step 213).

After the tip of the stopper 21 moves to a position just before approaching the platen roller 2, the pinch roller 6 separates from the platen roller 2 (steps 214 and 215>).
By separating the pinch roller 6, the recording paper 4 becomes free and falls due to its own weight, and the leading edge of the recording paper 4 is supported by the stopper 21 (step 216).

Further, the platen roller 2 is slightly rotated in the opposite direction, and when the number of pulses of the encoder 20 becomes N=NO, the platen roller 2 is stopped and initialized (step 217).
.

Then, the flow returns to the above-mentioned operation flow of positioning the leading edge of the recording paper 4 and aligning the side edges, proceeds to transfer recording of the next color, and after repeating transfer recording several times, proceeds to the same paper ejection flow as in the conventional example. , the recorded recording paper 4a is stored in the paper discharge cassette 12, and a command to start the next recording paper 4 is awaited (steps 114 to 119.100).

Next, the relationship between the number of pulses of the encoder 20 (the position of the platen roller 2) in the first embodiment will be explained in more detail than the above.

As mentioned above, the number of pulses of the encoder 20 when detecting the leading edge of the recording paper 4 is N=N2, but due to variations in the amount of slack of the recording paper 4 with respect to the grating roller 2 for each color, N=N2 is constant. 0, which does not have a value but fluctuates. For example, for negative color, N=N21.

The second color is N=N22. ...becomes...

The number of pulses of the encoder 20 at the start of transfer recording is N=N
2+N3 (setting value).If this value is not kept constant, registration will occur during multiple transfer recordings.Therefore, when starting transfer recording, N2+N5=N21+N3
1 (1st color) N2+N5=N22+N32 (2
N2 variation N21. N22.・
. . corresponding to N3 and N31. N32. ...
Correct it so that it becomes .

This correction is performed by providing a storage space (not shown) in the printer device 1, and using a recording start position signal (N2+N) of the platen roller 2.
The number of Y pulses (3) is set in advance in the memory. Then, the position signal of the platen roller 2 (the number of Y pulses of N2) when the leading edge of the recording paper 4 is detected by the leading edge detector 23 is compared, and the aforementioned recording paper 4 is stretched by the difference (N3). After that, the platen roller 2 is rotated to start transfer recording. As a result, recording can always be started at a constant position.

In the first embodiment of the present invention having the above-described configuration, the platen roller 2 and the pinch roller 6 are not always held in pressure contact as in the conventional example, and the recording paper 4 is held on the platen during a plurality of repeated operation flows. Even if the printer is completely separated from the roller 2, the recording start position for each color is always constant. As a result, there is no need to worry about load fluctuations during reverse transport of the recording paper 4, there is no need to maintain high precision in the platen roller 2 and the pinch roller 6, and registration-free transfer recording can be obtained.

Furthermore, before the start of recording, variations in the amount of slack in the recording paper 4 are absorbed by stretching the recording paper 4, and even higher quality transfer recording without registration can be obtained.

FIG. 7 is a configuration diagram of a printer device according to a second embodiment of the present invention (
FIG. 8 is a subroutine operation flow diagram of the second embodiment.

The second embodiment has a configuration that includes the first embodiment except for the configuration related to the recording paper tension rack SUB.

In FIG. 7, a leading edge catcher 25 is provided downstream of the pressure contact point of the thermal head 5 to clamp the leading edge of the recording paper 4. As shown in FIG. The tip catcher 25 has a pair of arms 25a, 2
Consisting of 5b and arrow El.

The recording paper 4 is rotated in the E2 direction by a motor-operating mechanism (not shown), and the recording paper 4 is rotated in the direction of arrow E3. It is rotated in the E4 direction and separated from the recording paper 4, and is placed in a position that does not obstruct the transport path of the recording paper 4.

Next, the recording operation on the recording paper 4 of the printer device of the second embodiment having the above-described configuration will be explained.

Note that operations that are the same as those of the conventional example and the first embodiment will be briefly described.

In the second embodiment, following the main operation flow shown in FIG.
The operation flow is the same as in the first embodiment, including the operation flow in which the pinch roller 6 is pressed against the platen roller 2, avoids the stopper 21, and simultaneously separates the horizontal alignment arm 22b from the recording paper 4 (steps 100 to 103 and 200 to 206). .

Thereafter, the subroutine operation flow of the recording paper tensioner SUB (step 400) shown in FIG. 8 is entered.

First, the thermal head 5 is held at a position slightly apart from the platen roller 2 (step 401).

Thereafter, the platen roller 2 is rotated in the forward direction (step 402), and the recording paper 4 is transported, and when the leading edge of the recording paper 4 reaches the position of the leading edge catcher 25, the platen roller 2 is stopped. At this time, the number of pulses of the encoder 20 is set to N=84 (set value) (steps 403 and 404), and the tip catchers 25a and 2
5b is rotated in the directions of arrows El and E2 to pinch the leading edge of the recording paper 4, and the platen roller 2 is slightly reversed to absorb the slack of the recording paper 4 and then stopped. The number of pulses of the encoder 20 at this time is N=N4-N5 (setting ri) (
7405.406).

As a result, the recording paper 4 between the pressure contact points of the leading end catcher 25 and the pinch roller 6 is stretched. In addition, the previous (ll-kr
The gripping force of the catcher 25 is biased weaker than the gripping force of the pinch roller 6, so even if the platen roller 2 rotates too much in the reverse direction, the recording paper 4 will slip between the catchers 25a and 25b, and the recording paper 4 will not be recorded on the platen roller 2. No relative positional shift of the paper 4 occurs.

In this way, with the recording paper 4 securely wrapped and stretched around the platen roller 2, the thermal head 5 securely presses and clamps the recording paper 4 on the platen roller 2, and then moves the catchers 25a and 25b to the arrow E3. ．． The platen roller 2 is rotated in the E4 direction to separate from the recording paper 4, and the platen roller 2 is rotated in the forward direction again. Then, when the number of pulses of the encoder 20 reaches N=N4-N5+N6 (set value), transfer recording is started (steps 407 to 410).

At this point, the subroutine operation flow of the recording paper tensioner SUB (step 400) ends, and the process returns to the main operation flow shown in FIG. After that, the flow is the same as the transfer-recording operation flow of the first embodiment, and the process ends after repeating transfer recording in which colors are recorded a plurality of times.

Next, the relationship between the number of pulses of the encoder (the position of the platen roller 2) in the second embodiment will be described in detail.

The number of pulses of the encoder 20 until the recording paper 4 reaches the catcher 25 can be set in advance.

Further, the number of return pulses of the encoder 20 when the recording paper 4 is stretched between the pinch rollers 6 can be set in advance, and is set to such an extent that slippage occurs in the catcher 25. Further, the number of pulses of the encoder 20 before the start of transfer recording requires a constant value and can be set in advance.

Therefore, when stretching the recording paper 4, the pinch roller 6
is not separated from the 1 Latin roller 2, and the recording paper 4
After being stretched, recording can always be started at a fixed position.

The second embodiment of the present invention having the above configuration can absorb the amount of slack in the recording paper 4 by stretching the recording paper 4 while maintaining the relative positions of the platen roller 2 and the pinch roller 6.
As in the first embodiment, transfer recording without registration can be obtained.

(Effects of the Invention) As detailed above, the recording paper feeding mechanism of the printer device according to the present invention reliably stretches and winds the recording paper around the platen roller before starting recording, and always keeps the recording start constant. By starting from the position, it is possible to absorb the amount of slack in the recording paper and to obtain high-quality transfer recording without registration, which is important in the characteristics of high-quality color print recording.

Further, for example, by providing a stopper for positioning the leading edge of the recording paper and a mechanism for regulating the position of the side edge of the recording paper, a printer apparatus in which more reliable registration-free, high-quality transfer recording can be obtained is shown in FIG. 1 according to the present invention. A configuration diagram (diagram showing the initial state) of the printer device of the first embodiment, a second embodiment
3 is a main operation flowchart of the present invention; FIG. 4 is a subroutine operation flowchart of the first embodiment of the present invention; and FIG. 6 is a perspective view of a side edge position adjustment mechanism of the present invention, FIG. 6 is a perspective view of a paper ejection cassette of the present invention, and FIG. 7 is a configuration diagram of a printer device according to a second embodiment of the present invention (initial state shown) ), FIG. 8 is a subroutine operation flow diagram of the second embodiment of the present invention, and FIG. 9 is a configuration diagram of a conventional printer device (a diagram showing the initial state)
, FIG. 10 is a diagram showing the state during transfer recording in the conventional example.
FIG. 1 is a diagram showing the state of returning recording paper in a conventional example, FIG. 12 is an operation flow diagram of the conventional example, and FIG. 13 is a perspective view of a platen roller.

1... Printer device, 2... Platen roller, 4...
...Recording paper, 5...Thermal head, 6...Pinch roller, 7...Transfer paper, 13...Paper feed roller, 1
4... Paper discharge roller, 15... Sub roller, 18a.
. . . Paper guide, 20 .

Claims (3)

[Claims] (1) A platen roller that winds and rotationally drives recording paper, a thermal head that presses the platen roller through the transfer paper and the recording paper, and a pinch roller that presses the recording paper against the platen roller. , a printer device that transports the recording paper in forward and reverse directions together with the platen roller for recording, wherein the recording paper is supplied to the side where the recording paper is supplied with respect to the pressure contact point between the pinch roller and the platen roller; A back roller is provided to sandwich the recording paper, and during recording, the recording paper fed onto the platen roller is stretched between the thermal head pressed against the platen roller and the rotating back roller. A printer device characterized in that: (2) A platen roller that winds and rotationally drives recording paper, a thermal head that presses the platen roller through the transfer paper and the recording paper, and a pinch roller that presses the recording paper against the platen roller. , a printer device for recording by transporting the recording paper in forward and reverse directions together with the platen roller, comprising a detector for detecting the position of the platen roller and a memory for storing the signal of the detector; A leading edge detector for detecting the leading edge of the supplied recording paper and the pinch roller are respectively provided at the pressure contact point between the platen roller and the thermal head, and the recording paper is supplied from the pressure contact point of the pinch roller. A back roller is provided on the side to sandwich the recording paper, and the recording paper fed onto the platen roller is stretched between the thermal head pressed against the platen roller and the rotating back roller. In addition, during recording, a recording start position signal of the platen roller stored in advance in the storage device, and a position signal of the platen roller by the detector when the leading edge of the recording paper is detected by the leading edge detector. A printer device characterized in that it is configured to set a recording start position of the platen roller by comparing the recording start position of the platen roller. (3) A platen roller that winds and rotationally drives recording paper, a thermal head that presses the platen roller through the transfer paper and the recording paper, and a pinch roller that presses the recording paper against the platen roller. , a printer device that transports the recording paper in forward and reverse directions together with the platen roller for recording, and a leading end catcher that clamps the leading end of the supplied recording paper at a pressure contact point between the platen roller and the thermal head. and the pinch roller, and the leading edge of the recording paper transferred by the pinch roller pressed against the platen roller is held by the leading edge catcher, and the platen roller is rotated in the opposite direction in advance during recording. A printer apparatus characterized in that the recording paper is stretched between the tip catcher and the pinch roller pressure contact point.