JPS62253472A - Thermal transfer image-forming device - Google Patents

Abstract

PURPOSE:To easily remove an image-receiving medium being jammed, by feeding the image-receiving medium and an image-forming medium by a predetermined distance and releasing them from each other, when the image-receiving medium is jammed during forming an image. CONSTITUTION:When a paper jam is detected based on an OFF signal (paper jamming detection signal) supplied from a switch 33 under the condition where an ink 601 is thermally transferred onto a paper P, a main controlling part 100 controls a feeding-controlling part and a thermal transfer ribbon-driving circuit to drive a platen-driving motor 89 and a ribbon-driving motor 90, thereby rotating (a1-a2) a platen 50 in the direction of an arrow to feed the paper P and taking up a thermal transfer ink ribbon 52 by an amount corresponding to the feeding distance of the paper P, followed by stopping a thermal transfer operation. By this, the paper P and the ink ribbon 52 adhered to each other by the ink 601 molted by heating are released from each other.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a thermal transfer image forming apparatus such as a thermal transfer type color copying machine.

(Prior Art) Recently, a thermal transfer color copying machine that performs color copying using thermal transfer ink ribbons of several colors has been put into practical use. By doing so, the image information of the original is read as a light color signal, this read image information is converted into color information corresponding to each ink of the thermal transfer ink ribbon, and this color information of each ink is temporarily stored. The stored color information is sequentially read out, and the corresponding ink section of the thermal transfer ink ribbon is used to thermally transfer the ink to the paper using the thermal head according to the read color information, so that the ink is sequentially transferred to the paper one color at a time. There are 11 color copies.

In a copying machine with the above configuration, an image is formed by attaching heated and melted ink to paper through thermal transfer, so during transfer, the paper and ink ribbon are glued together by the ink. It has become. After the transfer, the paper is conveyed between the pressing roller and the platen, and the ink ribbon is wound up between the platen and the guide section, so that each of the ink ribbons is peeled off.

By the way, if paper becomes jammed during transfer,
At that point, the image forming (thermal transfer) operation is stopped. Therefore, the operation may be stopped while the paper and the ink ribbon are partially glued together. In this way, when the operation is stopped without separating the paper and the ink ribbon, there is a drawback that if the jammed paper is forcibly pulled out, the ink ribbon will be pulled out along with the paper.

(Problems to be Solved by the Invention) The present invention avoids the above-mentioned disadvantage of pulling out the image forming medium together with the clogged image forming medium, and easily removes the clogged image forming medium. An object of the present invention is to provide a thermal transfer image forming apparatus that can perform the following steps.

[Structure of the Invention] (Means for Solving Problem rll1) In the thermal transfer image forming apparatus of the present invention, an image forming medium and an image forming medium are provided in a transfer section composed of a thermal head and a transfer body. In an image forming apparatus that forms an image on an image forming medium using an image forming medium by conveying the image forming medium and driving the thermal head according to image information, a detecting means for detecting the image forming medium; If the detection means detects that the image forming medium is clogged during image formation, the image forming apparatus and the image forming medium are moved through a predetermined path F.
and a control means for stopping the image forming operation after IHD transmission.

(Function) In the present invention, when a blockage occurs due to the image forming medium during the image forming operation, the image forming medium and the image forming medium are separated by being conveyed a predetermined distance, and then the forming operation is performed. It was designed to stop.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 2 shows the external appearance of a thermal transfer color copying machine as an example of a thermal transfer image forming apparatus, in which an image information reading device 2 is removably provided on the upper surface of the main body 1 of the apparatus.

This image information reading device 2 is provided with an original document cover 3 that can be opened and closed freely, and a document table (not shown) made of transparent glass on which a document is placed is provided below the cover 3. .

This image information reading 811112 is performed by optically scanning the original sheet placed on the document table by reciprocating the scanner section (details will be described later) consisting of an exposure optical system along the lower surface of the document table. , which photoelectrically converts this optical information. The signal converted by the image information reading station 2 is supplied to an image forming section 5 which is removably provided on the right side of the apparatus body 1. An image is formed on paper as a forming medium.

An operation panel 6 is provided on the upper front side of the image forming section 5 . Further, on the front side of the image forming section 5, a guide section 11 for manually feeding the paper is provided, which can be opened and closed freely, and on the top side, there is a paper ejection tray 12 from which the paper after transfer is ejected.
is provided. Further, in the main body 1 of the apparatus located below the image forming section 5, a paper feed cassette 13 for storing paper is provided so as to be freely accessible and removable. Note that 8 is vinegar for attaching and detaching a thermal transfer ink ribbon as a transfer agent, which will be described later, to and from the main body 1 of the apparatus.

On the other hand, FIG. 3 shows the configuration of the image information reading device 2. As shown in FIG. Two light sources 23 are arranged in parallel on the carriage 22 constituting the scanner section 21.
A lens 24 of 21IIIlj is arranged in an inverted V-shape between the two. Color CC is attached to the lower end of this lens 24.
A photoelectric converter 25 consisting of D is provided. The carriage 22 has one end slidably inserted into the guide shaft 26 and attached to a so-called timing belt (toothed bell 1 -) 27 stretched along the guide shaft 26 . This timing belt 27 is driven by a pulse motor 28. That is, the timing belt 27 is
Motor pulley P provided on the rotating shaft of the pulse motor 28
! and idle pulley P2ffJ,
The scanner section 2
1 is the illustrated arrow a.

It is moved in direction b. In addition, 29 is the photoelectric converter 25
An A/D converter 30 converts the output signal of the A/D converter 29 into a digital signal, supplies the power output from the inverter 31 to the light source 23, and converts the output signal of the A/D converter 29 to the image forming unit 5. It is a flat cable that supplies the

FIG. 4 shows the operation panel 6. As shown in FIG.

This operation panel 6 includes a print key 41 for instructing the start of printing (transfer), and a numeric keypad 42 for specifying the number of prints.
, a clear/stop key 43 for canceling the number of prints or instructing to stop printing, a stroke count display 44 for displaying the number of prints, etc., a base color setting section 45 for setting the shade of the base color,
A color depth setting section 46 for setting the shade of a color, a color tone setting section 47 for setting a color tone, a display device 48 for performing various displays,
Original mode key 4 to select the mode according to the image quality of the original
91 and a display section 492 that displays the selected mode;
Density specification key 7 for switching and setting print density in 5 levels
! and a display section 72 that displays the set density. The display 48 includes a jam display section 481 that lights up when a paper jam occurs in the apparatus main body 1;
a ribbon display section 482 that displays various states such as no ribbon in the ribbon cassette installed in the ribbon cassette or that the cassette itself is not installed, a paper display section 483 that displays the installation state of the paper feed cassette 13 or the presence or absence of paper, and a scanner section. 21
Scanner display section 484.48s that displays the operating status of
, and a paper size display section 486 that displays the size of the paper in the attached paper feed cassette 13.

Further, the image forming section 5 has a configuration as shown in FIG. That is, the platen 50 is located approximately at the center of the image forming section 5, and the platen 5
0 (toward the left in the state of FIG. 5), a thermal head 51 as a recording head (thermal head) is attached to the platen 50.
It is arranged so that it can come into contact with and separate from it.

Roughly speaking, the thermal head 51 is a ribbon cassette Re.
The thermal head 51 and the platen 5
0 and a thermal transfer ink ribbon (
A thermal transfer ribbon) 52 is interposed therebetween. Then, the paper (image forming medium) P is pressed against the platen 50 with the thermal transfer ink ribbon 52 interposed therebetween, and in this state, the heating element (not shown) formed in the line tod shape of the thermal head 51 is activated to form an image. By generating heat in accordance with the information, the ink on the thermal transfer ink ribbon 52 is heated and melted and transferred onto the paper P.

Further, a paper feed roller 53 is provided in the apparatus main body 1 diagonally below the platen 50, and is adapted to sequentially take out the sheets P stored in the paper feed cassette 13 one by one.

The taken out paper P passes through the paper guide path 54 and is guided to a registration row 555 disposed diagonally above the paper feed roller 53, and its leading edge is aligned by the resist 0-555. Thereafter, it is transferred toward the platen 50, and the press is wound around the platen 50 by rollers 56 and 57, and is accurately fed.

On the other hand, the thermal head 51 presses the paper P against the platen 50 via the thermal transfer ink ribbon 52, and heats and melts the ink 60 on the thermal transfer ink ribbon 52 and transfers it to the paper P, as shown in FIG. It looks like this.

Further, the thermal transfer ink ribbon 52 has approximately the same size as the paper P, and has colors of yellow (Y) and magenta (M), as shown by range A in FIG. 7, for example.

Each cyan (C) ink portion 60a, 60b.

60c side by side, or yellow (Y), magenta (M), cyan (C), and black (as shown in the range opening).
Each ink section 60a, 60b of BL).

60C and 60d are arranged side by side, and after transferring one color at a time, the paper P is returned to its original position and accurately stacked one after another.

In addition, each ink portion 608 to 6 of the thermal transfer ink ribbon 52
On the side edge corresponding to 0d, a bar code BC necessary for identifying each ink portion 608 to 60d and controlling the leading edge of each ink portion 608 to 60d to coincide with the leading edge of the paper P is provided. This barcode BC is read by a barcode detector (indicated by 78 in FIG. 10) which will be described later.

Note that when the thermal transfer ink ribbon is provided with a black ink portion 60d, this black ink portion 60d is used when it is desired to produce black clearly.

Three colors (60a~
60C) Almost black can be produced by bending.

In this way, the paper P is reciprocated by the number of colors by the rotation of the platen 50, but the light path of the paper P at this time is the first one that is sequentially arranged along the lower surface of the paper ejection tray 12. It will be guided onto the second guide 61.62.

That is, the explanation will be made with reference to FIGS. 8(a) to 8(d).

First, the paper MP supplied from the paper feed cassette 13 passes through the registration roller 55 and the first distribution gate 63, and is hung on the platen 5o (see FIG. 8(A)). .

Next, the platen 50 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 ( (not shown) generates heat according to the image information, and the ink 60 of the thermal transfer ink ribbon 52 is transferred to the paper P.

Furthermore, the leading edge of the paper P that has passed through the platen 50 is
is sent onto a first guide 61 provided along the lower surface of the paper output tray 12 by a sorting gate 64 (see FIG. 8).
(See b)).

In this way, the paper P onto which the ink 60 of one color has been transferred is transported backwards by reversing the platen 50, and the lower surface of the first guide 61 is moved by the rotational displacement operation of the first distribution gate 63. (see FIG. 8(c)).

As described above, by reciprocating the paper P a plurality of times, a plurality of colors are transferred.

Finally, the paper P to which all the colors of ink 60 have been transferred is
The paper is guided by the second sorting gate 64 to a pair of paper discharge rollers 65 and discharged onto the paper discharge tray 12 (see FIG. 8(d)).

Note that in the second figure, a pair of rollers 66 is for conveying manually fed paper, and the paper conveyed by this pair of rollers 66 is guided to registration rollers 55 via a guide path 68 and paper feed roller 53.

On the other hand, a plurality of switches are provided around the platen 50. That is, as shown in FIG. 9, in the vicinity of the registration row 555 of the paper guide path 54, there is a switch 33 that is turned off in response to the passage of the paper P to detect the presence or absence of the tray P, and a switch 33 at the top of the platen 50. For example, there is a switch for detecting the leading edge of the paper P, which is made of a photocoupler.

Switches 35.3 are provided in the vicinity of the pair of paper discharge rollers 65 and the second guide 62, respectively, for detecting the presence or absence of the paper P by being turned off in response to the passage of the paper P.
6 are provided respectively.

A paper jam of the paper P is detected by counting the off time of these switches 33, 34, 35, and 36 by a main control unit as Ill 10 means to be described later.

Next, the configuration of the both meeting forming section 5 will be further explained. In FIGS. 10 to 12, the printer block 71 has almost the same external shape as the ribbon cassette Rc, and the printer block 71 has a thermal head 51.
A head holder 72 that supports from the back and functions as a heat sink, a member (guide portion) 73 that is integrally attached to the head holder 72, one end of which is attached to the head holder 72, and the other end of which is a drive link. a rod 75 connected to the rod 74, a rotation support shaft 76 of the drive link 74, and a coil that rotationally biases the drive link 74 in one direction and moves the thermal head 51 toward the platen 50 via the head 75. A spring 77 and a barcode detector 78 consisting of a light emitting element and a light receiving element for detecting the barcode BC attached to the thermal transfer ink ribbon 52 are provided. The drive link 74, rod 75, pivot shaft 76, and coil spring 7
7 constitutes the horizontal head movement Ia.

The platen 50 is attached to seven frames attached to both sides of the printer block 71, and this frame 79 is provided with support shafts 80, 81 for pressure rollers 56, 57 that press the paper against the platen 50. ing.

The pressure rollers 56, 57 are driven by a solenoid (not shown). Further, a paper guide 82 is provided between the pressure roller 56 and the platen 50. Furthermore, as shown in FIG. 11, the frame 79 includes a motor 83 that drives the thermal head 51.
and a motor frame 84. A cam is provided on the rotating shaft (not shown) of the motor 83, and this cam causes the lever 8 provided on the rotating shaft 76 to be rotated.
5 is rotated, and the thermal head 51 is driven against the biasing force of the coil spring 77. Also,
The motor frame 84 includes a platen drive motor 86,
A ribbon drive motor 89.90 is provided to drive a winding core 87.88 (shown in FIG. 10) of the thermal transfer ink ribbon 52 housed in the ribbon cassette Rc. These motors 86, 89, 90 drive the platen 50 and the winding core 87, 88 through gears (not shown). As shown in FIG. 12, retaining protrusions 911 and 902 are provided. By controlling these ribbon drive motors 89 and 90, the thermal transfer ink ribbon 52 can run in both forward and reverse directions.

Also, #Jk! The ribbon cassette Rc is removably attached to the printer block 71. That is, as shown in FIG. 13, the ribbon cassette Re includes the holder 72, the member 73, and the thermal head 51 between the back surface of the exposed portion of the thermal transfer ink ribbon 52 and the ribbon cassette Rc.
The cross section is formed into a substantially U-shape to form a space 92 for accommodating the. In addition, in the ribbon cassette Rc,
A slit 933, which is fitted with the fitting part 711 (shown in FIGS. 11 and 12) of the printer block 71, is formed along the length direction between the core storage parts 931 and 932. . This slit 933 and the fitting part 71! The lengths 2 are approximately equal, and the length β is set to be more than half the width of the thermal transfer ink ribbon 52. Therefore, by moving the ribbon cassette Rc with respect to the printer block 71 in its length direction, the ribbon cassette Re can be attached to or removed from the printer block 71. In addition, the core storage section 931.93
2 are provided with engaging recesses 941 and 942 that are attached to the cores 87 and 88 housed inside, and when the ribbon cassette Rc is attached to the printer block 71, the engaging recesses 941.942 and the engagement protrusion 911.912 are adapted to be engaged with each other.

When the thermal head 51 is driven toward the platen 50 with the ribbon cassette Re mounted on the printer block 71, the thermal transfer ink ribbon 52 is brought into contact with the platen 50 by the member 73, as shown in FIG. A sheet of paper (not shown) is interposed between the platen 50 and the thermal transfer ink ribbon 52, and as the thermal head 51 generates heat according to image information, the ink on the thermal transfer ink ribbon 52 is heated and melted and transferred to the paper. be done.

FIG. 14 schematically shows the overall control system.

That is, the main control section 100 is mainly composed of, for example, a CPU (central processing unit) and its peripheral circuits, and includes a pass line 101.
is connected. This pass line 101 includes an image, an operation panel 6 of the forming section 5, a display control circuit 103 that controls this operation panel 6, a storage section 104, and a scanner control section 105.
,light? ! Il! A detection section 106, a color conversion section 107, a color separation section 108, a depression control section 109, a thermal I/head drive section 1101, a thermal head temperature υJm1 section 111, and the switches 33 to 36 are connected, respectively. The display control circuit 103 is connected to the pass line 1 from the main control section 100.
Each of the controllers operates in response to a signal sent through the controller 01, and controls a display 148 provided on the operation panel 6. Furthermore, signals from keys operated on the operation panel 6 are supplied to the main 11JI section 100 via a pass line 101, and control is performed in response to these signals. Further, the storage section 104 operates in response to a signal sent from the main control section 100 via the pass line 101, and stores information sent via the pass line 101 or reads out stored information.

On the other hand, the scanner control section 105 operates in response to signals sent from the main control section 100 via the pass line 101, and controls the light source 23 and pulse motor 28 of the scanner section 21, and the photoelectric conversion section 106, respectively. The photoelectric conversion unit 106 detects an image on a document according to a signal sent from the main control unit 100 via the pass line 101, and outputs a digitalized light color signal. The color conversion unit 107 is the photoelectric conversion unit 1
The color signal of the light output from 06 is divided into yellow, magenta,
It is converted into color signals of cyan and black inks, and these color signals are output to the pass line 101.

The two-color separation unit 108 converts the light color signal output from the photoelectric conversion unit 106 into, for example, black and red ink color signals, and is used to convert the light color signal output from the photoelectric conversion unit 106 into ink color signals, for example, black and red. Used when This two-color separation section 108
The output signal is output to the pass line 101. Furthermore, these two color separation section 108 and color conversion section 107 are connected to the pass line 1.
It is also possible to perform color conversion on the signal sent from 01 and output a new signal to the pass line 101.

The conveyance υ1i1D section 109 operates in response to a signal sent from the main 1IIID section 100 via the pass line 101, and the platen drive motor 86 drives the platen 50.
, a motor that drives the paper feed roller 53, the registration roller 55, the paper discharge roller pair 65, etc., and the first motor. It drives a solenoid (none of which is shown) that drives the second stationary gate 63,64.

The thermal head driving section 110 operates in response to a signal sent from the main III m section 100 via the pass line 101 and a signal from the thermal head temperature fi IIWJ section 111, and drives and controls the heating elements of the thermal head 51. The thermal head temperature IllrlJ section 111 controls the thermal head drive section 11 in response to a signal sent from the main till 111 section 100 via the pass line 101.
Outputs a temperature control signal to 0.

Further, the paper conveyance position detection unit 112 counts the number of driving pulses of a motor in a conveyance system (not shown) from the start of paper feeding of the paper P. ! (conveyance m from paper feeding) is detected.

The thermal transfer ribbon drive circuit 113 has a main Ill 10 part 10
The ribbon drive motor 89.90 is controlled in synchronization with the position signal of the paper P supplied from 0, and the core 87.88 of the ribbon cassette Rc is driven to drive the thermal transfer ribbon 52.
It is what drives the.

As shown in FIG. 15, this thermal transfer ribbon drive circuit 113 includes a control section 120 that controls the entire system, a ROM (read only memory) 121 that stores control information for the ribbon drive motors 89 and 90, and a ROM (read only memory) 121 that will be described later. a counter 122 that counts the amount of rotation of the ribbon drive motor 89 by counting rotation detection signals from the Hall element group;
Converts the control information read from the ROM 121 into an analog signal t6D/A converters 123a, 123b, these D/A converters 123a, 123b (F) pulses with a duty ratio according to the analog signal (voltage) from the sole Pulse width modulators (PWM) 124a, 12 that output signals
4b, 1) Hall element groups 126a and 126b, which are provided inside each of the ribbon drive motors 89 and 90 described in f7 and output a rotation detection signal @ (used for phase switching timing) according to the rotation of the motor, and these holes. element group 126a,
Distributors 127a and 127b each output a phase switching signal in response to a rotation detection signal output from 126b, and ribbon drive motors 89 and 90 each output a phase switching signal in response to a phase switching signal from these distributors 127a and 127b. By switching the winding current and determining the current value of the winding N current based on the on-duty of the pulse signals from the pulse width variable wA devices 124a and 124b, the ribbon drive motor 89. It is constituted by a drive circuit 1258° 125b that drives the drive circuit 90.

The ROM 121 stores control information for the ribbon drive motors 89 and 90 according to the count value of the counter 122. This i, IJt! The D information differs during paper transport before transfer, during transfer, when the ribbon is fed backwards, when stopped, and when the ribbon is fed without pressure without pressing the platen 50, and is set according to the count value during each operation. has been done. The above control information is particularly important when conveying the paper before the transfer.
Thermal transfer ink ribbon 52 with a larger torque than otherwise
It is now possible to drive.

Further, the main control section 100 detects a paper jam by counting the off signal time of the switches 33 to 36. When a paper jam is detected while outputting a drive signal to the thermal head drive section 110, that is, when a paper jam is detected during transfer, the main control section 100 controls the transport control section 109 and the thermal transfer ribbon drive circuit 113. υJIDL, After driving the platen 50 and the ribbon drive motors 89 and 90 to transport the paper P and the thermal transfer ink ribbon 52 a predetermined distance,
The transfer operation is stopped.

Next, the operation in such a configuration will be explained.

First of all, why don't you show it? ! ! When the 8 switch is turned on, the main control section 100 outputs an initial setting signal to the υ control section 120 of the thermal transfer ribbon drive circuit 113. Then, 11110
The unit 120 reads control information for initial setting from the ROM 121 and converts it to the D/A converter 123a.

123b. These D/A converters 1238.1
23b converts the supplied control information into an analog signal@voltage and supplies it to pulse width modulators 124a and 124b. Then, the pulse width modulators 124a and 124b output pulse signals having a duty ratio corresponding to the applied analog signal voltage to the drive circuits 125a and 125b, respectively.

As a result, the drive circuits 125a and 125b each rotate the ribbon drive motors 89 and 90 with a drive force determined by the on-duty of the pulse signal. As a result, the thermal transfer ink ribbon 52 is run in the forward direction. As a result of this running, when the barcode detector 78 detects the barcode BG on the thermal transfer ink ribbon 52, the control unit 120 stops the rotation of the ribbon drive motors 89 and 90 and initializes the counter 122.

In this state, when the print key 41 is turned on, the main 11Jm section 100 outputs a take-out signal to the conveyance control section 109. Then, the conveyance control unit 109 drives the paper feed roller 53 to take out the paper P. When the paper P starts to be taken out, the transport position detection unit 112 counts the number of pulses of the motor (not shown) of the transport control unit 109, and the transport position of the paper P is determined according to the counting result. It is about to be judged.

Next, when the paper conveyance position detection section 112 determines that the leading edge of the wAP has reached the point C of the opposing portion between the member 73 and the platen 50, the main control section 100 again activates the i and II controls of the thermal transfer ribbon drive circuit 113. The section 120 outputs a drive signal. Then, the control unit 120 reads a control signal corresponding to the sheet conveyance before transfer from the ROM 121, and outputs it to the D/A converters 123a and 123b. As a result, the drive circuits 125a and 125b each rotate the ribbon drive motors 89 and 90 with a drive force determined by the on-duty of the pulse signal. As a result, the paper P is conveyed while being sandwiched between the thermal transfer ink ribbon 52 and the platen 5°. Further, the counter 122 starts counting in response to a signal from the Hall element group 126a.

Then, according to the count value of the counter 122, the control a1M
When the 120 determines that the leading edge of the paper P has reached the point A (transfer section) where the thermal head 51 and the platen 50 face each other, it reads the control signal corresponding to the paper conveyance after the transfer product from the ROM 121, and A converter 123a, 12
Output to 3b. As a result, the drive circuits 125a, 12
5b rotate ribbon drive motors 89 and 90 with driving forces determined by the on-duty of the pulse signals, respectively. As a result, the paper P is conveyed while being sandwiched between the thermal transfer ink ribbon 52 and the platen 50.

Then, based on the count value of the counter 122, the control unit 12
0 determines that the tip of the 91 P has reached point B between the member 73 and the platen 50, the ROM 1
%D y'A converter 123a reads out a control signal corresponding to paper conveyance during transfer from 21.

123b. As a result, the drive circuit 125a,
125b rotate ribbon drive motors 89 and 90 with driving forces determined by the on-duty of the pulse signals, respectively. As a result, the thermal transfer ink ribbon 52 is conveyed until the initial position, that is, the printing start position, opposes the point A. Further, at this time, the thermal head 51 is moved by the head moving mechanism and comes into contact with the platen 50 via the paper P and the thermal transfer ink ribbon 52. and,
The heating element of the thermal head 510 is driven in accordance with the signal from the thermal head temperature control section 111, and the ink 60! is thermally transferred onto the MP using the thermal head 51.

In this state, when a paper jam is detected by the main control unit 100, that is, when the ink 601 is thermally transferred to the paper P as shown in FIG. 1(a), an off signal is supplied from the switch 33. If a paper jam is detected by (paper jam detection signal), main control 1a
ll1001. tlilt sending system 61 sending section 611 section 109
controls the transfer ribbon drive circuit 113 to drive the platen drive motor 86 and ribbon drive motor 89,90;
The printer $1P and the thermal transfer ink ribbon 52 are conveyed a predetermined distance.

In other words, the main control unit 100, as shown in FIG.
The platen 50 is rotated in the direction of the arrow shown in the figure (al to a2) to convey the gP, and the thermal transfer ink ribbon 52
After winding the paper P by the winding 2S87 by an amount corresponding to the transport distance of the paper P, the thermal transfer operation is stopped. As a result, the paper P and the thermal transfer ink ribbon 52, which are in a state of being adhered by the heated and melted ink 601, are separated.

Therefore, the paper P that is jammed during thermal transfer is reliably separated from the thermal transfer ink ribbon 52 by being conveyed a predetermined distance, thereby preventing the thermal transfer ink ribbon 52 from being pulled out when removing the jammed paper P. It is possible,
Only paper P can be easily removed.

Note that if you turn off the power when a paper jam is detected, i! When the power is turned on again, a paper jam is detected by the off signal (jam detection signal) supplied from the switch, and the paper and thermal transfer ink ribbon are separated by a predetermined distance 111.
If the operation is stopped after 1 ill is sent, the same effect as in the embodiment described above can be obtained.

[Effects of the Invention] As described in detail above, according to the present invention, it is possible to provide a thermal transfer image forming apparatus that can easily remove a clogged image forming medium.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a diagram for explaining the peeling operation according to the invention, FIG. 2 is a perspective view showing the external appearance of the image forming is, and FIG. FIG. 4 is a perspective view showing the general structure of the information reading device, FIG. 4 is a plan view showing the structure of the operation panel, FIG. 5 is a side sectional view showing the structure of the two-way forming section, and FIG. 7 is a plan view showing the ink application state of the thermal transfer ribbon, and FIGS. 8(a) to (d) are explanatory views shown to explain the movement of paper during multicolor transfer. Figure 9 is a diagram shown to explain paper passage detection, Figures 10 to 12
The figures do not show the main parts of the image forming section.
Figure 0 is a side sectional view, Figure 11 is a perspective view, Figure 12 is a 10th
13 is a perspective view showing the configuration of the ribbon cassette, FIG. 14 is a block diagram showing the configuration of the control system, and FIG. 15 is a thermal transfer ink ribbon drive circuit. FIG. 2 is a block diagram showing the configuration. 33 to 36...Switch, 50...Platen (transfer body), 51...Thermal head (thermal head), P.
... Paper (image forming medium), 52... Thermal transfer ink (b) Fig. 1 Fig. 2 Fig. 1j Fig. 5 Fig. 6 A Fig. 7 j Fig. 8 Fig. 8 79 Rc Fig. 10

Claims (2)

[Claims] (1) In the transfer section consisting of a thermal head and a transfer body,
In a thermal transfer image forming apparatus that transports an image forming medium and an image forming medium and drives the thermal head according to image information, an image is formed on the image forming medium by the image forming medium. a detecting means for detecting a forming medium; and when the detecting means detects that the image forming medium is jammed during image formation, after conveying the image forming medium and the image forming medium a predetermined distance; A thermal transfer image forming apparatus characterized by comprising a control means for stopping an image forming operation. (2) When the power is turned off in response to clogging caused by the image forming medium, the control means transports the image forming medium and the image forming medium a predetermined distance after the power is restored, and then
2. The thermal transfer image forming apparatus according to claim 1, wherein the thermal transfer image forming apparatus stops operation.