JPS6076378A - Transfer type heat-sensitive recorder - Google Patents

Abstract

PURPOSE:To reduce the number of parts, and to compact the shape of a device by separately driving a recording-paper carrier mechanism and an ink donor film carrier mechanism by turning an electromagnetic clutch ON-OFF by using the same driving source. CONSTITUTION:A motor is started to be turned at the same time as the starting of recording, and pulleys 102, 31 and a trigger roller 5 are rotated through timing belts 81-83. An electromagnetic clutch 52 is turned ON simultaneously, a paper-feed roller 6 is rotated through gears 51, 52, 61 and recording paper is started to be carried. A feed roller 3 is also rotated with the revolution of the pulley 31. An electromagnetic clutch 103 is turned ON at a fixed timing, a drive roller 1 is started to be rotated, and an ink donor film is carried and wound. Accordingly, the number of component parts is reduced, the shape of a device is compacted, and assembly and adjustment are also simplified.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a transfer type thermal recording device, and in particular, the present invention relates to a transfer type thermal recording device, and in particular, to a single driving source and independent control for separate mechanisms of a recording paper conveyance mechanism and an ink donor film conveyance mechanism. The present invention relates to a transfer type thermal recording device comprising a system.

[Prior art]

Using a recording paper that has been pressed to a predetermined size in advance, the recording paper is superimposed on a thermal recording medium called an ink donor film (hereinafter abbreviated as IDF), and is placed on the thermal head by following the conveyance of the thermal recording medium. A transfer type that records predetermined image information by conveying the IDF and transferring it to the recording paper by melting the ink of the IDF using thermal energy selectively applied from the thermal head according to the image information. In the thermal recording device, the recording paper is transferred from the paper feed tray into which the recording paper is loaded to the thermal
At least a mechanism for transporting the IDF to a thermal transfer recording section composed of multiple DFs and a mechanism for transporting the IDF at the recording section are required. Since the driving sequences of these two mechanisms are generally not performed at the same timing, in conventional transfer type thermal recording apparatuses, independent drive sources are applied to each of the mechanical sections to perform drive control for each mechanism separately. One of the driving sources can be a step motor, a stepping motor, etc., but as mentioned above, when two driving sources are used, two stepping motors are also required, and of course the driver and control system should also be adapted accordingly. Only the number is required.

Due to these structural requirements, conventional transfer type thermal recording devices have 1. The shape of the device becomes larger.

2. Assembly and adjustment are complicated.

3. Equipment cost increases.

There were other problems.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a transfer type thermal recording device that can simultaneously achieve a compact device shape, simplify assembly and adjustment, and reduce costs. do.

[Structure of the invention]

Therefore, in the present invention, the above-mentioned recording paper transport mechanism and I
The same drive source is used for the DF conveyance mechanism, and each mechanism is driven separately at specific timings according to the on/off of the electromagnetic clutch provided in each mechanism, thereby reducing the number of components of the recording section. The above objective is achieved by measuring the reduction.

[Detailed description of the invention]

Embodiments of the present invention will be described in detail below based on the accompanying drawings. FIG. 1 is a schematic structural diagram of a transfer type thermal recording device showing one embodiment of the present invention.
An rDF conveyance mechanism mainly composed of a pinch roller 2,
A motor 7 is provided which serves as the same driving source for the paper conveyance mechanism constituted by a recording paper feed roller 3, a registration roller 4, a trigger roller 5, and a paper feed roller 6.

The rotating shaft 70 of the motor 7, the drive roller 11, the feed roller 3, and the trigger roller 5 are connected via timing belts 81, 82, and 83i, respectively, and transmission is transmitted from the motor 7 via the timing belts 81, 82, and 83i, respectively. The same driving force is applied at different timings. FIG. 2 is a diagram showing a schematic structure of the drive roller 1, feed roller 3, trigger roller 5, and paper feed roller 6, which can be driven at different timings as described above.

First, the drive roller 1 shown in FIG. 2 (&) is made of a magnetic material.
The rotating shaft 70 of the motor 7 is connected to the rotating shaft 70 of the motor 7 via a timing belt 81 wound around the motor 2 . Further, an electromagnetic clutch 103 is fitted into the rotating shaft 100 of the drive roller l, which is slidable only in the axial direction and configured to attract or detach from the gooley 102 depending on the energized or de-energized state when the roller is turned on or off. has been done. Therefore, the drive roller l is connected to the electromagnetic club Te 103.
is controlled to be turned on and is driven to follow the driving force transmitted from the motor 7 via the timing belt 81 only when it is attracted to the gooley 102. Next, the feed roller 3 shown in FIG. 2(b) is fixed to its rotating shaft 30 (5) and is directly connected to the rotating shaft 70 of the motor 7 via a timing belt 82 wound around the nollie 31. Therefore, if the feed roller 3 is always rotated at a timing synchronized with the motor 7 via the timing belt 82, the rotation speed becomes K. Further, the trigger roller 5 shown in FIG. 2(c) K is also made of a magnetic material, and a rotary shaft 50 on which a roller 51 is fixed is rotatably fitted therein, and the timing belt 83 is directly wound thereon. Further, an electromagnetic clutch 52 having the same configuration as the electromagnetic clutch 103 of the drive roller 1 shown in FIG. Only when the trigger roller 5 is attracted to the trigger roller 5 in an excited state, it is driven to follow the operation of the trigger roller 5. Further, the gear 51 is meshed with a gear 61 fixed to a rotating shaft 60 of the paper feed roller 6 via an intermediate gear 52. Therefore, the paper feed roller 6 is connected to the timing belt 83 only when the electromagnetic clutch 52 is turned on.
It follows the driving force (6) transmitted from the motor 7 via the gear 51, and is driven by the driving force determined by the gear ratio of the intermediate gear 52-gear 61.

Also, Figure 3 (&) # (b) l (c), (d
) are timing charts showing the operating states of the motor 7, paper feed roller 6, feed roller 3, and dryer 2o-51, respectively.Hereinafter, the recording operation of the apparatus of the present invention will be described in detail based on the timing chart shown in FIG. Describe.

First, based on the recording start operation, the rotation of the motor 7 is started at, for example, timing t1 (see FIG. 3(,)), and as a result, the rotation shaft 70 of the motor 7 is connected via the timing belt 81°82.83. Ghoulies connected 10
2.31) Rotation of the regga roller 5 is started.

At the same time, the trigger roller 5! Magnetic la.

52 is turned on and the signal is transmitted through the rotation gear 51, intermediate gear 52, and gear 61 of the trigger roller 5, and the paper feed roller 6 is rotated (see FIG. 3(b)). This paper feed roller 6 is pressed against the recording paper P loaded in the paper feed tray TK with a predetermined pressure, and as the paper feed roller 6 rotates, conveyance of the recording paper P is started. Further, as shown in FIG. 2(b), the feed roller 3 is fixed to the nollie 31 via a rotating shaft 30, so it follows the rotation of the nollie 31 and is rotated at a timing synchronized with the motor 7. (See Figure 3(c)). On the other hand, at this point, the electromagnetic clutch 103 of the drive blow 21 is still
is kept off f? :, and the drive roller 1 is not driven (see FIG. 3(d)). Now, as described above, the recording paper P conveyed as the paper feed roller 6 rotates is then placed between the feed roller 3, which has been rotated in advance as described above, and the registration roller 4, which is pressed against the feed roller 3 with a predetermined pressure. The paper is supplied and conveyed while being smoothed by the pressure contact force of the registration roller 4 and the rotational force of the feed roller 3, and further sent to a predetermined recording position between the IDF 10 and the pack roller 11. At this timing, that is, timing t3, the front 8 vL magnetic clutch 103
is controlled to be on, and the drive roller 1 is turned on.
It is rotated following the rotation of 7-102. Further, the dry roller 1 is pressed against the pinch roller 2 with the IDF 10 between the IDF 10 and the pressure contact force of the pinch roller 2, the rotational force of the drive roller 1 mentioned above,
10 starts to be conveyed, and is taken up from the IDF supply roller 12 to the take-up roller 13. Further, the pack roller 11 described above presses the recording paper P and the IDF 10 against the thermal head 14 with a predetermined pressure, so that the recording paper P is pressed against the IDF 10 when the IDF 10 is conveyed as described above. The sheets are conveyed between the pack roller 11 and the thermal head 14 in an overlapping state. At this time, the thermal head 14 selectively generates heat at required locations according to the image information, and the IDF 1 is melted at the heat generating locations.
0 ink is transferred onto the recording paper P and the image information is recorded. Along with this recording, the conveyance of the recording paper P progresses, and when the recording paper P is completely conveyed within the paper feed tray TK, the paper feed roller 6 comes into contact with the next recording paper, and this paper Therefore, when recording only one sheet, the electromagnetic club and tray 52 are turned off before the recording paper P is completely fed from the paper feeding tray (9) TK, that is, at timing t3. 1o-5
By stopping the drive of 6, the conveyance is canceled.

Therefore, after the electromagnetic clutch 52 is turned off, the paper feed roller 6 is rotated only by the friction of the recording paper P being conveyed by the rotation of the feed roller 3 and the registration roller 4.

Next, use the method described above! l) Thermal transfer recording is continued while the recording paper P is conveyed following the conveyance of the IDF 10, and the electromagnetic clutch 10 of the drive roller l is activated at the time when the thermal transfer recording is completed, that is, at timing t4.
3 is turned off and the electromagnetic clutch 103 is disengaged from the gooley 102, thereby stopping the rotation of the drive roller l (see FIG. 3(d));
Stop transporting DF 10.

Here, if the number of sheets to be recorded is one, as described above, the rotation of the motor 7 is also stopped at timing t4 when the recording ends (see FIG. 3(,)). At this time (lO), the rotation of the feed roller 3 is naturally stopped (see Figure 3 (,)). 0 Note that recording is performed continuously on the recording paper P loaded in the paper feed tray TKK. In this case, the motor 7 is rotated continuously and each record shown in FIG. 3 (
This can be done by driving the paper feed roller 6, feed roller 3, and drive roller 1 at the timings shown in b) to (d).

Furthermore, as is clear from the device configuration shown in FIG. 1, the present invention has been described with respect to an embodiment of a thermal recording device installed in a copying machine using a thermal recording method.

A copying machine having such a configuration is provided with a scanner unit 20 above the recording section for reading and scanning an original document, and a driving mechanism for the scanner 22 and 20 is also required. In this regard, in the case of the apparatus of the present invention, it is also possible to use the above-mentioned motor 7 as a drive source for the scanner unit 20, and an embodiment in this case is shown in FIG. That is, the rotating shaft 70 of the motor 7 and the roller 16 equipped with the electromagnetic clutch configured as described above are connected via a timing belt 84, and the roller 16 and the scanner unit driving roller 17 are connected via a timing belt 85. and connect the electromagnetic clutch, and turn on the electromagnetic clutch.

The rollers 16 and 17 are intermittently driven in response to the off state, thereby enabling the scanner unit 20 to scan back and forth.

〔Effect of the invention〕

As explained above, according to the transfer type thermal recording apparatus of the present invention, the same motor is used as a drive source for the recording paper conveyance mechanism, the IDF conveyance mechanism, etc., and each is driven at different timings. It has the excellent effect of reducing the number of parts, making the device more compact, simplifying assembly and adjustment, and reducing costs at the same time.◇

[Brief explanation of the drawing]

FIG. 1 is a schematic structural diagram of a transfer type thermal recording device showing an embodiment of the present invention, FIG. 2 is a schematic diagram showing the structure of each roller constituting the device shown in FIG. 1, and FIG. A timing chart showing the driving states of each roller and motor, and FIG. 4 is a schematic structural diagram of a transfer type thermal recording apparatus showing another embodiment of the present invention. 1... IDF drive roller, 2... pinch roller, 3... feed roller, 4... registration roller,
5...Trigger roller, 6...Paper feed roller, 7...
Motor, 81.82.83.85...Timing belt, 10...Ink donor film, 11...Pack roller, 12...IDF supply roller, 13...I
DF take-up roller, 14... thermal head, 15.
...11 Paper row-y, 103.52...Electromagnetic clutch. (13)

Claims (1)

[Claims] A recording paper transport mechanism that transports the recording paper loaded in the paper tray to a thermal transfer recording section comprising an ink donor film stretched between a thermal head and a pack roller; In a transfer type thermal recording device that includes at least an ink donor film transport mechanism that transports an ink donor film, the same drive source is connected to both of the mechanisms, and the drive force from the drive source is transmitted to each of the mechanisms. 1. A transfer type thermal recording apparatus, comprising: an electromagnetic clutch for disconnecting the electromagnetic clutch; and a control means for driving the electromagnetic clutch at specific timings according to desired driving states of each of the mechanisms.