JPS60262681A - Image-forming device - Google Patents

Abstract

PURPOSE:To enable a transfer material to be wound with a predetermined tension thereon by a simple mechanism, by controlling the drive for rotating winding cores in accordance with the diameters of rolls of a transfer material on the winding cores. CONSTITUTION:Voltages impressed on motors 106A, 106B for rotating a pair of winding cores 31, 32 around which a transfer material for printing is wound are controlled in accordance with the diameters of the rolls of the cores 31, 32. The roll diameters can be easily estimated by use of a counters operated in conjuction with the cores 31, 32. Optimum voltages according to the counts on the counters are previously set, and voltages corresponding to the current counts are impressed on the motors 106A, 106B.

Description

Detailed Description of the Invention [Technical Field of the Invention 1] The present invention relates to an image forming apparatus that forms an image by transferring a colorant on a transfer material to a transfer material according to image information. reactor.

[5t; Ming's 1★Technical backing 1 and its problems 1 For example, this scale device winds the transferred material around the platen (J [Put back and forth +!
A color image is formed by transferring a plurality of colorants on the transfer material to the transfer material via a thermal transfer head while feeding. The material and the material to be transferred are polymerized and moved,
The transfer operation is performed for a plurality of color agents by transferring the transfer material for each color agent.

By the way, it is desirable that the above-mentioned transfer material is constantly applied with tension and stopped running without sagging. Therefore, it is wound around a pair of cores each having a driving source, and tension is applied in the direction in which each core C' is removed. Receive it and move.

I am worried that I will be stopped from driving.

However, as the transfer material is run, one layer appears on the core.
Since the roll diameter of the transferred transfer material changes gradually, in order to perform transfer while moving the transferred material at a constant speed of 1, it is necessary to use a unit with both side drive sources. It is necessary to control the number of rotations per hour according to the winding diameter of the transfer material. In this case, if we adopted the conventional method of sequentially detecting the rotation speed and winding diameter of the drive source and calculating the optimal rotation speed of the drive source to feedback control both sides of the drive source, the control system would be complicated and the equipment would be large. There was a problem of becoming

[Object of the Invention] The present invention has been made in view of the above circumstances, and its purpose is to control the driving source of the core according to the winding diameter of the transfer material while applying tension to the transfer material. An object of the present invention is to provide an image forming apparatus capable of performing 811 and simplifying its control system.

[Summary of the Invention 'y5] In order to achieve the above object, the present invention stores drive data of a drive source corresponding to the winding diameter of the transfer material in advance,
The winding diameter of the transfer material is detected, and based on the detection result, the driving of the drive source is controlled with a driving force corresponding to the stored data.

[Embodiment J of the Invention First, the overall RI8 configuration of an image forming apparatus, which is an embodiment of the invention, will be described.

FIG. 1 is an overall external perspective view of an apparatus according to an embodiment of the present invention, FIG. 2 is a schematic perspective view showing the internal structure of the apparatus as a whole, and FIG. 3 is a longitudinal sectional side view of the apparatus.

In the figure, reference numeral 1 denotes the main body of the image forming apparatus, and an operation panel section 1a is formed on the front surface of the apparatus main body 1. Also, on the top surface of the main body 1, there is a document holding cover 3 on the left side.
The lower side of the document table 2 in the apparatus main body 1 is a document scanning section (scanner section) 4 that scans the original set on the document table 2.
The right side inside is an image forming section (printer section) 5.

The operation panel section 1a displays the operating status and heat of the image forming section 5.
F7; For example, selects the LCD display section 6 that displays the selected state of the printing ribbon, the cullet eject key 7 used to take out the ribbon cassette, and, for example, another document scanning section (not shown) connected to the main body 1 of the apparatus. Online Sukiyanagi-8 etc. are installed.

In addition, as shown in FIG. 2, in the document scanning section 4, a movable scanning section 9 of the exposure optical system optically scans the r-plane of the document table 2, and this optical information is photoelectrically converted. 4r is inputted to the image forming section 5.

Further, the l-oriented image forming section 5 has a configuration as shown in FIGS. 2 and 3. That is, a platen 10 is disposed approximately at the middle heat section of the image forming section 5, and a print head such as a thermal head (hereinafter simply referred to as a thermal A head (also referred to as a head) 11 is disposed so as to be movable in contact with the platen 10.

The υ-maru head 11 is attached to the rear end surface of the holder 12 via a heat dissipation plate formed integrally with the holder 12, and a thermal transfer ribbon cassette (hereinafter referred to as
7. A thermal transfer ribbon 15 as a transfer material is interposed between the thermal head 11 and the platen 10 by holding the ribbon 14a. -How is the situation?

Further, a paper feed roller 16 is provided diagonally below the platen 10 so as to sequentially take out the sheets P of the transfer material stored in the paper feed rollers 1 to 17 one by one. The leading edge of the taken out paper P is aligned by the registration rollers 1 to 18 arranged diagonally above the paper feed roller 16, and then transferred towards the platen 10, and then moved to the press rollers 19, 20. The paper is wound around the platen 10 (pulled) and fed accurately. A manual feed guide 17 Δ is provided below the paper feed cassette 17 on the stop surface side of the main body 1 of the apparatus, and the paper is fed manually. There are also 4 pieces that can be used for paper.

On the other hand, the thermal head 11 presses the paper P against the platen 10 via a thermal transfer ribbon 15 as a transfer material.
As shown in FIG. 4, the ink 21 as a colorant on the thermal transfer ribbon 15 is heated and melted and transferred onto the paper P.

The thermal transfer ribbon 15 is approximately the same as the paper P, and is yellow (Y) in size, as shown in the middle range of FIG.
, magenta (M), and cyan (C) ink portions 21a.
, 21b, 21c side by side, or I31
Yellow (Y), magenta (M) as shown in the range mouth J-
, cyan (C), black (B) ink portions 21a, 21
1), 1c, 21 (I was set up 4 times),
After transferring one color at a time, the paper P is returned to its original position, and the transfer is performed by accurately overlapping one after another.

The thermal transfer ribbon containing the black ink portion 21d is used when it is desired to produce a clear image, and even a ribbon without the black ink portion 21[1] can produce approximately black by removing the three colors.

In this way, the paper P is reciprocated as many colors as the platen 10 rotates, but the path of the paper P at that time is the first and second rows arranged sequentially along the lower surface of the paper output tray 22.
will be guided by the guide 23, 2/I.

In other words, C will be explained with reference to FIGS. 6(a) to 6(d). First, the paper P supplied from the paper feed cassette 17 is moved to the registration roller 18. Then, it passes through the placement part of the first distribution kite 25 and is wound around the platen 10 (see FIG. 6(A)).

Next, the platen 10 is rotated using a pulse motor (not shown) as a driving source to transport the paper P at a predetermined speed, and a heating element of a thermal head 11 (see FIG. (not shown) generates heat according to the image information, and the ink 21 of the thermal transfer cartridge 15
is transferred onto paper P.

), the leading edge of the paper P that has passed through the 10 platens (
, 1, and is sent by the second sorting guide 26 to the first guide 231- provided on the side of the paper discharge tray 22 (see FIG. 6 (opening)).

In this way, the paper P on which the ink 21 of one color has been transferred is transported backwards by reversing the platen 10, and the lower surface of the first guide 23 is moved by the rotational displacement operation of the first distribution nocoid 25. (See Fig. 6 (c)).

By moving the paper P back and forth a plurality of times in this manner, a plurality of colors are transferred.

Finally, the tray P on which all the color inks 21 have been transferred is guided by the second distribution guide 26 to the 11th paper 1-1-ra 27 and discharged onto the 1st paper 1-ray 22 ( Figure 6 (
d) see].

FIG. 7 schematically shows the overall control system. That is, in the figure, reference numeral 40 denotes a main control unit that controls the entire device, and is mainly composed of, for example, a CPU (L!Intral Processing Unit) and 122 circuits surrounding it, to which a lotus line 41 is connected. has been done.

The lotus line 41 includes the operation panel section 1a,
A display control circuit 42, a storage section 43, a scan control section 44, a photoelectric converter 45, a color conversion section 4 (i), a transport control section 47, a thermal head drive section 48, and four thermal head temperature control sections are connected to each other. The display control circuit/'12 operates in response to a signal sent from the main control section 40 via the pass line 41, and controls the display section 6 provided in the operation panel section 1a+. , from the main control unit 4 to the pass line 4
1 and operates in response to a signal sent through path line 4.
The scanning control section 44 operates in response to a signal sent from the main control section 40 via the lotus line 41, and reads out the stored information. The front lamp 9A, the photoelectric converter/15, and a scanning motor (not shown) of the movable scanning section 9 are each driven and controlled. Detects the above image and outputs a light color signal as described above.The color converter 46 receives and processes the signal output from the photoelectric converter 45, and converts it into one yellow, one magenta, one cyan, and one black. The color conversion unit 46 also performs color conversion on the signals sent from the pass line 41, and outputs each color signal to the pass line 41. It can also be output to the pass line 41.The conveyance control unit 47 operates in response to a signal sent from the main control unit 40 via the pass line 41, and controls the motor that drives the platen 10 and the ribbon hlet 14a. Motor that drives the winding core, the paper feed roller 16. Registration roller 1
8 and the paper ejection []-27, etc.; .

The three-thermal head drive section 48 operates in response to a signal sent from the main control section 40 via the pass line 41 and a signal from the thermal head temperature control section 49, and
Drive control of the first heating element. The thermal head temperature control section 4 outputs a temperature control signal to the thermal head driving section 48 in response to a signal sent from the main control section 40 via the lotus line 41.

Next, the vicinity of the platen will be explained in detail. FIG. 8 is a side sectional view C of the vicinity of the platen. In the figure, d3 and 50 are frames, side frames 50A,
Box 1 to frame 50B, and ribbon cutlet h 14
It is integrally constituted by a ribbon cassette holding frame 500 that holds a. A pair of studs 51 are placed in an upright position (on the front and back sides of the paper in FIG. direction).

The ribbon force set 148 is located on the right side of two parallel winding cores 31° 32 around which both ends of the thermal transfer ribbon 150 are wound, and the middle part of the thermal transfer ribbon 15 is connected to the platen 10 and the thermal head 11. The structure is such that it is enclosed in a case 33 with a part of it exposed so as to be interposed between the two.

-A pair of openings 34, which are open along the axial direction of the cores 31 and 32, are formed between the core accommodating portions 33a and 33b of the case 33, facing each other. In the vicinity of the opening 34, a guide portion 37 for guiding the thermal transfer ribbon 15 being wound and displaced is curved and integrally formed with the case 33. The back of this guide part 37 is connected to the upper pair of studs 5.
1 is inserted into this stud 51 so as to sandwich it.

Further, a first pressing roller unit 60 is provided at the upper position of the platen 10, and a second pressing roller unit 60 is provided at the lower position.
1-Rani 1 nit 70/fi is provided. The detailed structure of both units 1-60 and 70 is shown in FIG. The first pressing is to roller unit 16
0 is a shaft 62 pivotally supported on a bracket (not shown) of the unit 1-, a pair of levers 63 fixed to the units 1 to 62, and a press rotatably supported on the free end of the lever 63. (Puller 20, the operating lever 6/I fixed to one end of the shaft 62, the operating lever indicated by the arrow
It is composed of a biasing member 65 that rotates in one direction, a solenoid 66 that rotates the C operating lever 64 in the direction of arrow Y1 against the biasing force of the biasing member 65, and a paper guide 67. During operation, the leading edge of the paper that is wrapped around the platen 10 and transported presses against the platen 10 (=Jke[]-
The solenoid 66 is energized until the roller 20 reaches the space between the rollers 20 and 20. When the paper P is pressed, the solenoid 66 is demagnetized and pressed (the roller 20 is forced to press against the surface of the platen 10 to grip and convey the paper P. Also, the second pusher 1-reroller unit 7o is operated in the same manner as described above). It is composed of a bracket (not shown), a lever 73, a pressing lever 74, an urging member 75, a solenoid 76, and a vapor guide 77, and operates in the same manner.

As shown in FIG. 8, the thermal head 11 is pressed against the surface side of the brine 10 during the rolling operation, and when the paper P is conveyed back, it is pushed toward the surface side of the platen 10.
) r It is possible to move in the direction of the eighth arrow 1-9M in the figure so as to separate from the r. That is, Fig. 8 and Fig. 1
0, one end of a push rod 91 is fixed to the rear side of the holder 12 via a mounting plate 90, and this push rod 91 is slidably inserted into the holding frame 50C into the ribbon force set 1. There is. And on the other end of this Pushshi Colorado 91, there is a push lever 9.
One end of the bushing lever 92 is pivotally supported, and the other end of the bushing lever 92 is rotatable integrally with a drive shaft 93. Note that this drive shifter l~93 is the ribbon cassette holding frame 5.
It is pivoted to 0G. The above Pushshikoreba-92 is
The thermal head 11 is pushed toward the surface of the plastic lane 10 by the force J of the biasing member 94 ('
I'm like J.). Zoshi C drive shift 93
A cam 95 is attached to one end, and this cam 95 engages with a cam roller 97 attached to the -9 shaft 96Δ of the head drive motor 96, and moves in the direction of arrow 1' and M' in the 14th figure. It is designed to oscillate.

1-The thermal head 11 itself has a heating element substrate 1 equipped with a heat sink '11△2 heating resistor as shown in FIG.
1B, IC Zippyang electric rod/, cover 11 that covered 1 etc.
Consists of 0. (Let's take a look at Figure 12.)
SL- written ribbon guide 9.79 is the heat dissipation plate 11Δ
Attached to both sides in the longitudinal direction (pair of brackets 1
~100A and 100B are rotatably supported.

Next, the thermal transfer ribbon drive iFJ+ control system, which is the main part of the present invention, will be explained in detail.

FIG. 13 (Δ) is a sectional view T, but does not show the thermal transfer/nohon travel I-7 drive section. The above side frame 5OA has a drive shirt]-102△, 1 corresponding to each winding core 31.32.
0213 is pivotally supported, and one end on the front side has a lower part; 31
, 32, and which transmit rotational force to the winding core, are attached, and gears 104Δ, 104B are fixed to the other end. As a drive source for the winding core 31, for example, a drive motor 106Δ having a drive gear 105Δ on its motor shaft that meshes with the gear 104A is used as a drive source for the winding core 32, such as a drive motor 106Δ that meshes with the gear 104B. A drive gear 105B with a fHA of 9 axes and a drive gear 106B are provided. However, the ribbon power set 14. a is fed out from the core of the loading high 1 (couplings 103△, 103B are coupled to the core, and the surface drive motors 106A, 106B are rotationally driven to drive the thermal transfer ribbon 15) and the other core It will be wound up and moved.

In addition, when the surface drive motors 106A and 106B are stopped, the braking mechanism 160 is surface driven in order to maintain the tension applied to the thermal transfer ribbon 15 and prevent sagging.
10 (installed near 5f3, -J. This a1
The details of the 11-movement J geometry 160 are shown in Figures 1 and 3 (I3).The solenoid 161 is slidably fitted into the solenoid 161, and the plunger 162 is fixed to the plunger 1+ Tied 1llt FIRY
/("I operating lever 163, -G plunger 162
(J) installed in the middle of the operating lever 163 in the sliding direction of
The guide hole 163Δ is inserted into the corresponding guide hole 163A, and the blades 1 to 16 are fixed to the pins 71 and 16 (not shown).
4-, l, 1.ζ for the rotors 106Δ', 106B' of both drive motors 106Δ, 106f"i, respectively;
The brake pad 165 (made of a material with a relatively high friction coefficient of 41, for example, 4T) attached to the operating lever 163 and the brake pad 1-165 are attached to the circumference of the motors 106Δ' and 106B'. It is composed of a force member 166 that forces the operating lever 163 in the direction of contacting the surface. However, when the solenoid (to 161) is demagnetized, the brake pad 16 is
5 is brought into contact with [l-ri 106Δ', 106B', and the rotation of [106A', 106B' is restricted. @
In the invitation, the biasing member 166 (=J force is resisted and the "C" button pad 165 is pushed 111II12 from the circumferential surface of the rotor 106Δ'106R', and the rotors 106A', 106
Rotation of B' is allowed. Therefore, the drive motor 'I
When O6△, 106B is stopped (1), that is, when the power is turned off, the free rotation of rotor cylinders 068', 106B' is restricted, so that the thermal transfer ribbon 15, which was under tension, can perform the next transfer without loosening. It is possible to reliably prevent C breakage due to impactive tension acting on the transfer material when the drive motor is started immediately after the power is turned on.

The driving rotors 106A and 1C6B are driven by a Tanabata drive device shown in FIG. 14. In the figure, 106△
, 106B is the drive motor described above, which is constructed as a brushless motor, for example, and prevents the rotor from rotating by switching excitation currents of a plurality of stator windings. This motor drive support includes a processing device @140, a counter 1/11, a first ball element 142A, a first latch D/A converter 143Δ, and a first pulse width modulator 144Δ.
, first distributor 145A, first main circuit 146Δ, drive motor 106Δ, second latch D //Δ converter 1
43B, second pulse width modulator 1/I 413, second
Hall element 142B, second distributor 1/15B, second
main circuit 146B, drive motor 106B and fuselage 711-
It consists of an ink cleaner 108.

The processing device 140 controls the reset 1- and start/switch I of the 14 counters, inputs the count value from the counter 141, and controls both latches (]/A converters 143Δ, 1
Output of latch signal to 44B, output of digital amount from counter 141 to callan 1 according to the value, input from photointerrupter 108, IIP2 transmission control section 47
It performs input and output from the main control section 40 via the main control section 40.

The counter 141 operates in response to a signal from the processing device 140, starts counting pulses from the first Hall element 142A in response to a start signal from the processing device 140, and ends the counting in response to a stop signal.

Furthermore, when the first run ends, the count number at that point is output to the processing device 140.

Both wedge D/Δ converters 143A and 143B are processing device 1
When the latch signal is input from 40, the processing device 14 converts the digital amount from 0 to D/Δ, and converts the analog value from the first latch D/A converter 143Δ to the first pulse width modulator 14.
/1. A, the analog value from the second latch D/A converter 143B is output to the second pulse width modulator 144B.

Both pulse width modulators 144Δ, 144B have respective latch D/A converters 143. Main circuit 146A performs pulse width modulation according to the analog output values from A and 143B, and sends the signals to the respective main circuits 146A.

Output to 146B.

The first Hall element 142A detects the rotor position of the drive motor 106Δ and outputs it to the first distributor 145A as well as to the counter 141.

The second Hall element 1/12B detects the rotor position of the drive motor 106B and outputs it to the second distributor 145B.

Both distributors 145A and 145B have Hall elements 1428 and 1
The main circuit 146 is activated by the date position r detection signal from 42B.
A phase switching signal is output to Δ and 146B.

The amphigenic circuit 1/I6Δ, 146B is connected to the corresponding distributor 1/I6Δ, 146B.
Current is caused to flow through each fixed/child winding of the drive motors 106△ and 106B in accordance with the phase switching signals from I5△ and 1/15B.

This current value is determined by the on-duty of the pulses output from the first and second pulse width modulators 144Δ, 144B. Therefore, by avoiding changes in this A2-T, the drive motors 106A, 1
06B can be controlled independently, thereby making it possible to apply a desired tension to the heat transfer ribbon 15 to avoid running stoppage.

Further, a mechanism for detecting a bar code is provided to detect the stop position of the thermal transfer ribbon 15. J
That is, as shown in FIG. 15 (Δ), the thermal transfer ribbon 1
5, coloring agents are applied in the order of yellow (Y), magenta (M), cyan (C), and black (B) along the traveling direction, and the coloring agents are transferred along this order. Therefore, regarding color detection (well, since it is sufficient to perform it only for yellow (Y), 2 barcodes 107A are printed near the area of yellow (Y), and 1 barcode is printed near the area of colorants of other colors. A wooden barcode 107B is printed on it.

Furthermore, three barcodes 107C are printed in predetermined areas to detect the near end of the thermal transfer ribbon.

Detection of these barcodes 107A, 107B, and 107G is performed by a photointerrupter 108 shown in FIG. 15(B). The photointerrupter 108 includes a light emitting element 108Δ and a light receiving element 108B+, which is divided into three parts.
08B2.

108B3 are arranged to face each other across the path of the thermal transfer ribbon 15. For example, as shown in FIG. 8, the photointerrupter 108 is attached (pull) to the edge of the bottom frame 50B via the substrate 109Δ so that the thermal transfer ribbon 15 exposed from the case 33 is inserted therethrough. The output of 108 is] Nectar'109
It can be taken out via B. Therefore, the color detection of the colorant yellow (Y) and the detection of the tip I billion are expressed by the bar ″X
] - Magenta (M) and cyan (C) are sequentially detected by detecting the bar code 107B when the colorant of other colors is transferred.

The tip of the black ([3) coloring agent (1'/edge detection is increased to 11).

Above) Light receiving element 108B+ of the first interrupter 108
, 108B2.108Ba output (Mit Hassu Line 41
ITI! not shown in FIG. 14 above. It is configured to be input to the equipment 140. The E1-control unit 40 is the processing device 14. Based on the output of the photo ink printer 108, the drive motors 106△, 106B ("fX pressure" is Control etc.

Next, drive data for both drive motors 106Δ and 106B will be explained.

The drive wheel of this device is set for each preset running state of the thermal transfer ribbon, and the drive wheel for each running state is set according to the winding diameter of the thermal transfer ribbon 15 wound around the winding core 31. are set respectively. For example, in this apparatus, the running operating state of the thermal transfer ribbon is changed to the transfer operating state (the thermal head 11 is pressed against the platen 10 side).
Thermal transfer ribbon 1 runs while melting and transferring the colorant 1- to the paper P), the peeling operation state (the thermal transfer ribbon 1 runs after the transfer operation is completed)
5 from the paper P),
A stopped operating state (a state in which the thermal transfer ribbon 15 stops running while tension is applied to the thermal transfer ribbon 15), a non-pressure running operating state (a state in which the thermal head 11 is pressed against the platen 10 (t)
71 (・d'
i'i dole. J, the winding diameter of the thermal transfer ribbon 15 wound around the winding core 31 is the first Hall element 1 /I
2 A br + etc. output for a predetermined time (processing agreement 140
After the star 1 signal is output, the stop signal is output. When the count number is 51 and the minimum winding diameter (for example, 22 mm diameter), the count number is 11.
It is 7. In these four types of running operation states fσ, both drives 7-
E 106△, 106B (7) drive data is set, and its specific contents are 41 as shown in Tables 1 to 4 (these contents are stored in the storage unit 13 as four types of data tables). Here, Table 1 shows the drive data for the transfer operation state, Table 2 shows the drive data for the peeling operation state,
Table 3 shows drive data in the stopped operating state, and Table 4 shows drive data in the non-pressurized traveling operating state. Also, the voltage applied to both drive motors 106A and 106B is 01-1.1
1-1. ..., 9th day, Δl-1, B l-1.

Cl-1,DI-1,l3l-I F+-1,) stage c
0 is the maximum and FH is the minimum.

(The following is a blank space) Then, the main control unit 40 selects one of the 4T data tables shown in Tables 1 to 4, which are necessary for driving the motors 106A and 106B on both sides in accordance with 1 gram, and further Drive data corresponding to the number of pulses detected via the counter 141 is read out from the selected data table to drive both drive seventh units 106A and 106B. Note that the winding diameter of the thermal transfer ribbon 15 in this device (that is, the pulse number counter by the counter 141 is measured by pressing the thermal head 11 against the platen 10 at a speed equal to the circumferential speed of the platen 10 during the initial operation when the power is turned on) This is done for a predetermined time, that is, a predetermined distance (the J thermal transfer ribbon 15 is run and the drive motor 106A is rotated at this time. After that, until the power is turned off, the fourth color for each sheet of paper w, P is transferred). In synchronization with a transfer start signal for melting transfer of the black coloring material, the above-mentioned number of pulses 1 to 1 are performed for a predetermined period of time to be used for the image forming operation on the next sheet of paper.

Note that the counter 141 is an example of a winding diameter detection means for detecting the winding diameter of the transfer material wound around the core, and the storage section 43 stores information about the transfer material necessary to set the traveling speed of the transfer material to a predetermined value. This is an example of a storage unit that stores drive data for both station motion sources according to the winding diameter for each preset traveling operation state of the transfer material. This is an example of a control means that controls the motors on both sides by reading drive data of the transfer material winding diameter corresponding to the signal from the storage means corresponding to the required traveling operation state of the transfer material.

Next, the operation of the present apparatus will be explained with reference to FIGS. 16(A) to (C), focusing on the control of the drive motors 106A and 106B.

<Initial operation when the power is turned on> When the power is turned on, first, when the thermal head 11 is completely pushed toward the platen 10 as shown in FIG. Applying tension to the thermal transfer ribbon by applying 1-lux in the opposite direction, the thermal transfer ribbon is run while rotating the platen 10 in the direction of the arrow shown in FIG. 16(A). A predetermined period of time has elapsed since the first Hall element 1 detected the first Hall element 1, that is, the yellow colorant.
The output from 42A is counted by the counter 141, and the number is 1 to 11'! At the same time, the rotation of the platen 10 also stops. In addition, the drive motor 106△, which falls during this operation,
The drive data 106B is stored in the storage unit 43 as a data table for initial operation.

The count number obtained as described above corresponds to the winding diameter on the winding core 31 of the thermal transfer ribbon 15 installed in the apparatus, and then the main controller/'40 The drive data corresponding to a series of counts is read out from the data table for the peeling operation shown in FIG. control and perform the peeling operation. After 1♀112 of the platen 10, the thermal transfer ribbon 15]1-' is applied with a torque that allows it to run in the direction of the arrow shown in FIG.
Then, the platen 10 is rotated in the direction of the arrow shown in FIG. 16(B), and the ribbon 15 is slightly returned and conveyed in the direction of the arrow shown in FIG. 16(B). Then, the main control unit 40 reads drive data corresponding to the above-mentioned count number from the data table for stop operation shown in Table 3, and applies this to both the latch D/A converters 1/1.3A,
143B to control the drive motors 106A and 106B to perform a stopping operation.

That is, as shown in FIG. 16(C), when the rotation of the platen 10 is stopped, the motors 106A and 106B on both sides are operated so as to apply a tension that will prevent the thermal transfer ribbon 15 from moving even if the thermal head 11 is separated from the platen 10.
After that, the thermal head 11 is separated from the surface of the platen 10 as shown in FIG. 16 (one). After that, the system explained in Figure 13 (F3) @
By demagnetizing the solenoid 161 of the mechanism 160, the rotor 10'6A- of 106B is transferred to the both-side row motor 910G.
.

106B- with the brake pad 165, and then voltage application to both upper and lower drives 106A and 106B is turned off.

Both image forming operations> When an instruction for image forming operation is given after the initial operation is completed, the main control unit 40 first detects the above initial 1 full operation from the data table for stop operation shown in Table 3. The drive data corresponding to the number of cylinders 1 to 1 is provided, and by this, the 1 to 1 torque control of both drive motors 106A and 10611 is performed, and tension is applied to prevent the heat transfer motor 15 from starting to move. Braking is difficult on Jl. 100
is released, and the immediate thermal head 11 is pushed toward the surface of the platen 10 as shown in FIG. 16 (1-).

Next, the main control unit/10 reads the drive data corresponding to the count number from the data table for the 1ν and 0 drive operations shown in Table 1 above, and adds it to the data table for the 1ν and 0 drive operations. The motors 106△ and 106B are controlled by 1 herc to apply a tension that can send the heat exchanger 15 without slack in the direction indicated by the mark in FIG. 16(F).

At this predetermined timing, the platen 10 is also
) is rotated in the direction of the arrow, and paper P is fed from the other side.

Then, the heat transfer θ ribbon 15 is aligned, and after the leading edge of the paper in the conveyance direction reaches the pressing position between the heat sensitive head 11 and the platen 10, the colorant of the first color 1 is applied. The yellow starts to roll, and the thermal transfer ribbon 15 and one sheet of paper are carried in the direction of the arrow shown in FIG. 16(G).

Immediately after completing the yellow transfer, the 1st system 9 unit 40 reads the drive data corresponding to the 11th count number from the data table for the peeling mt operation shown in the 28th section, and thereby The torque of both drive motors 106A and 106B is controlled to cause the thermal transfer ribbon 15 to slacken in the direction of the arrow shown in FIG. 40 reads the drive data corresponding to the above-mentioned count number from the data file for stop operation shown in the third table, and outputs it to both the latch D/A converters 143A and 143B to drive the drive motor. 106Δ and 106B are controlled to perform a stopping operation.That is, as shown in FIG. 16(1), the rotation of the platen 10 is stopped and the thermal transfer ribbon 15 does not start moving even if the thermal head 11 is separated from the platen 10. Both drive motors 106A,
106B, and after step A, as shown in FIG.

Then, in order to convey the magenta coloring agent, which is the second coloring agent, to the transfer start position, the main control unit 40 selects the counter l from the data pull of the non-pressure running action shown in Table 4. - The drive IJJ゛-Y corresponding to the number is read out, and thereby the torque of both drive motors 106△ and 106B is controlled, so that the thermal transfer ribbon 15 can be fed without slack in the direction of the arrow shown in FIG. 16(K). The material is conveyed a predetermined amount by applying a certain amount of tension. At the same time, the platen 10 is reversely rotated in the direction of the η arrow shown in FIG. 16 (1<) in order to return the paper P to the transfer start position.

In this way, when the paper P is returned to a predetermined amount (■) and the thermal transfer ribbon 15 is sent to a predetermined position, it is pushed toward the thermal pad 11 or the platen 10 (=J), and then shown in Table 2. The drive data corresponding to the count number "2" is read out from the data table for the indicated size peeling operation, and the drive motor 1 is operated to align the beginnings of the paper [) and the thermal transfer ribbon 15.
06A and 106B are driven to transfer paper P and thermal transfer ribbon 1.
5 is slightly returned and conveyed as shown in FIG.

Thereafter, by repeating the operations explained in FIGS. 16(G) to (L), preparations are made for transferring the magenta colorant and the transfer operation using the cyan colorant, and then by repeating the same operations, the cyan color is transferred. Preparation is made for the transfer of the agent and the transfer operation using the black color agent.

When transferring the final color black, it is synchronized with the transfer start signal for a predetermined time (the first Hall element 1
The output from /'I2△ is counted by the counter 141,
In the image forming operation for the next paper P, the drive motors 106A and 106B are operated based on the count number obtained this time.
Zukoyoshi reads out the drive data.

After the transfer using the black colorant is completed, the paper 1) and the thermal transfer ribbon 1j5 are peeled off H1, and the paper P is directly conveyed and discharged.

Next, the C' platen 10 is reversed and the C thermal transfer ribbon 15 is conveyed back using the data table for the peeling operation to perform positioning 4 for forming both images on the next sheet. After the alignment is completed, the thermal transfer ribbon 15 is stopped while tension is applied using a stop 1-operation data table. At this time, the thermal head 11 is
0 to 11811 and brake with the braking mechanism 160 to drive both drives II! By turning off the application of heavy pressure to the II7-taters 106Δ and 106B, the image forming operation on the paper is completed.

From now on, if there is an instruction for image forming operation, it will move in the same way.
Ru.

As explained below, in this device, the heat transfer 71"
Drive motors 106A and 106R of the ribbon 15 f-
The information is stored as four types of data tables set for each running operation state of the thermal transfer ribbon set in advance, and the drive data for each data table is determined based on the winding diameter of the thermal transfer ribbon 15 wound around the core. Since they are set according to the corresponding number of pulses, the drive motors 106Δ and 106B can be controlled so as to apply the optimum tension to the thermal transfer ribbon according to the winding core of the thermal transfer ribbon. Moreover, the control can be done by reading out the drive data of the corresponding count number from the data table of the corresponding part and using it in J. Therefore, the control system can be simplified without the need for complicated calculations. .

Note that the above-mentioned embodiment is merely an example, and it goes without saying that various modifications can be made within the scope of the gist of the present invention.

For example, the first stage of winding diameter detection is not limited to the counter 14:l that counts pulses from a Hall element, but can be replaced with a limit switch that detects by contacting the thermal transfer ribbon, or a light emitter/receiver that detects optically. is possible.

Further, the preset travel state of the transfer material is not limited to the four types described in the embodiments, but can be set as appropriate.

Furthermore, the timing at which the winding diameter of the thermal transfer ribbon is detected is not limited to when the power is turned on and when the transfer of the fourth color starts. It can be set as appropriate, such as at the start of transcription.

Further, the printing head is limited to a thermal head, and it is also possible to replace it with a structure such as a wire tod type.

[Effect of the Invention 1] As is clear from the above description, in the image forming apparatus of the present invention, while applying tension to the transfer material 1), the driving source of the core is controlled according to the winding diameter of the transfer material. This has excellent effects such as being able to perform one operation and simplifying the control system.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention. The perspective view, Figure 7, shows the internal 4M configuration of the entire device.
3 is a schematic perspective view, FIG. 4 is a perspective view for explaining the transfer operation state, FIG. 5 is a plan view showing the ink application state of the thermal transfer ribbon, and FIG. ), (
B), (C), and (D) are explanatory diagrams explaining the movement of the paper that is pressed during multicolor transfer. Figure 7 is a configuration block diagram showing the entire control system. Figure 9 is a schematic side view showing the details of the platen, Figure 10 is an exploded perspective view showing the displacement mechanism of the thermal head, Figure 11 is the platen and An explanatory diagram showing the positional relationship with the ribbon guide, etc., FIG. 12 is an assembled perspective view of the thermal head and ribbon kite, and FIGS. 13 (A) and (B) are sectional views showing the running drive section of the thermal transfer ribbon. Detailed explanatory diagram of the braking mechanism, Fig. 14 is a circuit diagram showing the motor drive device, Fig. 1
Figures 5 (A) and (B) are plan views and hemostasis diagrams for explaining barcode detection, and Figures 16 (A) to (1-) are diagrams of the apparatus of this embodiment, mainly focusing on the traveling drive of the thermal transfer ribbon. It is a detailed operation explanatory diagram. 1'1...print head, 1ε5...transfer material, 3'1, 32...core, 40...
・Control means, /43...Storage means, 141...
... Winding diameter detection means, 722 Fig. 2 P] 1 Fig. 5 A Fig. 16 (B) 5 Fig. 16 (D) 1'? 919 = Figure 16 (E) (F) 5 79 1 1'9 Figure 16 (H) 5 Figure 16 (J) Figure 16 (to)

Claims (1)

[Claims] A pair of windings, each covering the drive source, are wound around the ji, and the transfer material is subjected to tension in the winding direction of each winding core, and is printed in the middle of each -C traveling movement Δ. Transfers the colorant from the transfer material to the transfer material via the head to form an image.
In an image forming apparatus, a winding core (5 windings) and a winding diameter detecting means for detecting the winding diameter of a transfer material, and a winding diameter detecting means for detecting the winding diameter of a transfer material (41 rotations: t) required to set the traveling speed of the transfer (4) to a predetermined value are used. A memory means for storing the drive settings of the double-layer power source according to the diameter of the shrine for each preset traveling operation state of the transfer material, and a memory corresponding to the detection signal from the winding diameter detecting means. Nine means for controlling the drive of the two-layer drive source are provided, one of which is one storage means corresponding to the traveling operation state of the transfer material, for controlling the drive point of the transfer material winding diameter. An image forming apparatus characterized by ().