JPS6112381A - Color thermal transfer recorder - Google Patents

Abstract

PURPOSE:To simplify a driving mechanism and a controller, by a construction wherein a recording head is set into a pressed state or a released state in relation to a platen by a turnable lever turned in engagement with a part rotated together with the platen. CONSTITUTION:When the platen 1 is switched into the state of being rotated in the direction of an arrow (b) so as to return a transfer recording paper 13 to an initial position, the turnable lever 20 is turned clockwise with a fulcrum 21 as an axis, since an arcuate and part 20a thereof is normally maintained in contact with a driving roller 4a. As the lever 20 is moved, a link 15 is turned, and a bifurcated part 15a of the link 15 pushes a pin 14a downward. As a result, a head base 9 is moved downward against an elastic force of a compression spring 10, and the recording head 8 is separated from the platen 1, that is, pressing is released. Thereafter, the arcuated end part 20a of the lever 20 and the driving roller 4a slide on each other in a condition convenient for escape, whereby the platen 1 can further continue rotating in the direction of the arrow (b).

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a color thermal transfer recording apparatus, and more particularly to improvements in the driving portion thereof.

BACKGROUND TECHNOLOGY In general, thermal transfer type color recording devices are disclosed in, for example, Japanese Patent Publication No. 8204540 and Japanese Patent Publication No. 58-663.
Publication No. 3 A Rui tz Utsukai No. 57-174053 Publication I
This is listed. In J:5, repeat fHt for one page as many times as there are primary colors. For example, yellow (Y).

When performing color recording using the three primary colors of magenta (M) and cyan (C), record only the color yellow (Y) for one page, then return to the original recording start position and print magenta (M). After that, it returns to the original recording start position and records cyan (C). This results in
Finally, yellow (Y).

A color recorded image is obtained by sequentially overlapping three primary colors of magenta (M) and cyan (C).

Recording is performed while the sheet-shaped color ink medium and the recording paper are brought into pressure contact between the recording head and the platen. The recording head has a plurality of recording elements arranged one line width apart in the main scanning direction.
ing. In the color ink medium, color ink layers for each primary color are formed in plane sequential manner for each color. The recording head is moved in one sub-scanning direction to perform recording in the row direction.

The platen is moved step by step in the main scan for each line recorded. Repeat the recording head feed 9 and the platen feed alternately. When recording for one page is completed, the pressure contact of the recording head is released, and the platen rotates in the reverse direction to return the recording paper to its original position. Pull back to the recording start position. By repeating this operation for each primary color, it is possible to obtain a color recorded image formed by overlapping recordings of a plurality of colors.

By the way, in this type of color recording apparatus that performs the series of operations described above, the number of driving parts inevitably increases. Moreover, it is necessary that each driving part be able to operate independently. For this reason, the color recording equipment in this building had no choice but to use multiple motors. however,
As a result of the heavy use of motors, the cost of the device increases and problems arise.

Even if the motors that drive each drive part are made common by using a lunoid or an electromagnetic clutch, for example, there is a control system to control the operation of each drive part without maintaining a synchronized relationship with each other. The problem remains that the configuration of the device becomes complicated.

Purpose The present invention is intended to solve the above-mentioned problems.The purpose of the present invention is to automatically link the press-fit and press-release operations of the recording head to the platen operations, thereby making it possible to It is an object of the present invention to provide a color thermal transfer type recording device in which the configuration of the rmJ machine and the control device can be simplified.

Structure In order to achieve the above object, the structure of the present invention includes a platen that is driven to rotate in both forward and reverse directions to perform overlapping color transfer, and a platen that is pressed against the platen during a transfer operation and is pressed against the platen during a non-transfer operation. A color thermal transfer type recording apparatus having a recording head that is released, and having an excitation lever that engages with a part that rotates together with the platen and drives the platen to a fixed position on the same side as the rotary blade. (b) The recording head is moved to the pressing position I11 or the pressing release position by the movement of the movable lever.

Hereinafter, preferred embodiments of the present invention will be described based on the drawings.

In each figure, the same reference numerals indicate the same or corresponding parts.

FIG. 1 schematically shows a color thermal transfer type recording apparatus according to an embodiment of the present invention.

The color thermal transfer type recording apparatus, the outline of which is shown in the same figure, consists of a platen 1. Recording head8. It includes a head drive mechanism 101, a paper feed roller 102, and the like.

Between the platen 1 and the recording head 8, a transfer paper 13 and the above-mentioned color ink sheet 12 are supplied in a stacked manner. Paper 13rX is supplied to platen 1 by paper feed roller No. 102. Ink sheet 12U,
The sheet of paper 12 is fed out from the supply roll 12a1 and fed between the platen 1 and the head 8 together with the paper 13. The used ink sheets 1 are sequentially wound onto the winding roll 12b.

Here, the head 8 is a thermal head, and is driven to move in the direction of arrow A in FIG. 1 by a head drive mechanism 101. The head drive mechanism 101, which will be described in detail later, performs an operation of pressing the head 8 onto and releasing the pressing from the platen III. This operation, which will be described in detail later, is linked to the operation of the platen 1.

FIG. 2 shows the vicinity of the platen 1 viewed from the front.

In the figure, a platen 1 is rotatably supported by side plates 3a and 3b via bearings 2a and 2b.

The side plates 3a, 3b are connected to the bottom plate 3C at their lower portions.

A pulley 4b integral with a drive roller 4a is fixed to the right side protruding shaft 1b of the platen 1 with a set screw 5.

A belt 6 is placed around this pulley 4b. Furthermore, this belt 6 is connected to a motor (not shown).The platen 1 is driven to rotate in both forward and reverse directions by the motor.

A drive roller 7 is fixed to the left protruding shaft 1a of the platen l. This drive roller 7 is fixed to the right side protruding shaft 1b! It is similar to the JA dynamic roller 4a.

Next, the head drive mechanism 101 will be explained.

A head stand 9 formed in a U-shape is attached to the recording head 8.
It is attached to the A recess 9a formed in the center of the head stand 9 is elastically biased toward the top, that is, toward the platen 1, by a compression spring 10 via a push-up lever 11. As a result, the recording head 8 is pressed against the platen 1 side with the ink sheet 12 and the transfer paper 13 sandwiched therebetween.

FIG. 3 shows a state in which FIG. 2 is viewed from the right side.

In the figure, the recording head 8 is in a pressed state. The head stand 9 has bins 14a and 14b erected side by side on one open surface thereof. This bottle 14a.

14Mff: Freely inserted into the long holes 3d and 3e of the side plate 3b. This allows the head stand 9 to slide up and down within the range of the inner diameter of the elongated holes 3d and 3e.

Further, the tip of the -10,000 bottle 14aH1 is fitted into the fork-shaped bifurcated portion 15& of the link 15. The link 15 is connected to links 16 and 17 via a shaft portion 18 on its proximal end side. Further, the link 17 is rotatably supported on the side plate 3b by a shaft portion 19. This forms a so-called toggle mechanism.

Further, a rotating lever is connected to the link 16 via a shaft portion 23. The rotating lever 20 can rotate about its fulcrum 21 and is biased upward by a spring 22. Thereby, the arcuate end portion 20a of the rotary lever is always in contact with and secured to the drive roller 4a.

Here, when performing the transfer operation, the platen 1 rotates in the direction of arrow A. Further, when returning the transfer paper, the platen 1 rotates in the direction of the arrow.

When the platen 1 is switched from rotating in the direction of arrow A to rotating in the direction of arrow A, when the platen 1 returns to its original position, Lo! 4th shift lever 2
Since the arcuate end portion 20a of the roller 0 is always in contact with the drive roller 4a, the roller 0 is moved toward the clock side with the fulcrum 21 as the axis. Then, as shown in FIG. 4, the link 15 rotates with the movement of the rotary lever and comes into contact with the stopper U. This will result in link 1
The bifurcated portion 15a of 5 pushes down the bottle 14m. As a result, the head stand 9 in FIG.
is moved downward against the elastic force of Along with this, the recording head 8 also separates from the platen l and releases the pressure bond.

As described above, only the transfer paper 13 can be returned while the ink sheet 12 remains stopped.

FIG. 4 shows the state of the rotary lever and the link 15 when the platen 1 rotates in the direction of the arrow and the recording head 8 is released from pressure.

After reaching the state shown in the figure, the platen l can continue to rotate further in the direction of the arrow because the arc-shaped end 20a of the first shift lever and the drive roller 4a slide in a state where they can escape from each other. . This makes it possible to reversely transport only the transfer paper to the original position, pH, t/f, in a state in which the pressure N of the head 8 is released.

When the transfer paper is returned to a predetermined position and the next transfer operation is started again, the platen 1 rotates again in the direction of arrow A. As a result, the rotary lever is rotated counterclockwise and moved to a position where it abuts against the stopper 5, as shown in FIG. In this state, the head 8 is pressed against the platen l by the elastic force of the spring 10, contrary to the case described above. In other words, the head 8 is set to the pressure-bonding state and the transfer operation is performed.

As described above, when the transfer paper is sent back, the pressure contact of the head 8 is automatically released in conjunction with the rotation of the platen 1 at this time. Also, when performing the transfer operation,
At this time, the pressure bonding of the head 8 is automatically released in conjunction with the rotation of the platen l. This simplifies the mechanism of the part that drives the crimping of the head 8 and the release of the crimping, and eliminates the need to control the drive of the head 8 while synchronizing it with other driving parts. The configuration of the device can also be significantly simplified.

Although the above explanation has been made regarding the right side plate 3b side, the left side plate 3a side is also constructed in the same manner as the right side. That is, the drive roller 4a on the right side is A driving roller 7 and a rotating lever d are similarly provided on the left side corresponding to the application of the rotating lever.

In this case, the right rotation lever 20 and the left rotation lever m
' is shown by a dashed line in FIG. 2, J: Eel shaft member n
If they are connected to each other, one of the driving rollers 4a or 7 can be omitted.

In addition to this, for example, the spring 22 and the like need only be provided on one side.

FIG. 5 shows another embodiment of the invention.

In the embodiment shown in the same figure, the arc-shaped end 20m is attached with a rotating lever.
A high-friction elastic material 26a such as rubber is disposed at.

Accordingly, the spring 22 shown in FIG. 3 can be made unnecessary. In this case, as shown in FIG.
The distance R from the center of 01L to the fulcrum 21 is increased by the width δ that can be absorbed by the elastic deformation ξ of the elastic material 26a. Also, link 16 in Figure 3. It is also possible to omit In and connect the rotating lever 20 directly to the link 15.

In addition, the rotation lever 20 is attached to the tension spring 28 in FIG.
This is to ensure that it is always located in the center.

One end of this spring is attached to the shaft portion 18, and the other end is attached to the fixed side attachment portion 29. And the shaft part 1
8 is located on the right side of the line connecting the fulcrum 21 and the fixed side mounting portion 29, the position of the rotary lever can be smoothly and reliably switched in accordance with the rotation of the drive roller 4a. As a result, the effects of the above-mentioned embodiment can be obtained even better.

FIG. 7 shows yet another embodiment of Jin's invention.

In the embodiment shown in the figure, a gear 3 is provided on the drive roller 4a side, and a sector gear (9) is formed at the arc-shaped end 20a of the rotary lever. With this, the same effects as those of the embodiments described so far can be obtained.

Figures 8, 9, and 1O show the push-up bar 1 in Figure 2.
1 shows another embodiment of part 1.

In the embodiment shown in the figure, a cam hole 11m is formed through the push-up bar 11 of FIG. 2 (FIGS. 9 and 10).

At the same time, the cam 27m (FIG. 8) that abuts the cam hole 11a from the inside is firmly attached to the shaft member I shown by the dashed line in FIG. The rollers ensure that the rotation movement of the rotation lever can be converted into the vertical movement of the push-up bar 11.

Effects As described above, in the color thermal transfer recording apparatus according to the present invention, the operation of press-fitting and press-release of the recording head can be automatically linked to the transfer operation and the return operation of the paper, and as a result, the drive mechanism and control The effect is that each device can be simplified. .

[Brief explanation of the drawing]

FIG. 1 is a diagram schematically showing a color thermal transfer type recording apparatus according to an embodiment of the present invention, FIG. 3 is a diagram showing a state of FIG. 2 viewed from the right side, FIG. 4 is a diagram showing another state of FIG. 3, FIG. 5 is a diagram showing another embodiment of the present invention, and FIG. FIG. 7 is a diagram showing still another embodiment of the present invention; FIGS. 8, 9, and 1θ are diagrams showing another embodiment of a portion of FIG. 2. FIG.

Claims (4)

[Claims] (1) Color thermal transfer recording that has a platen that is driven to rotate in both forward and reverse directions to perform overlapping color transfer, and a recording head that is pressed against the platen during transfer operation and released from the press when non-transfer. In the device,
It has a rotary lever that engages with a part that rotates together with the platen and moves it to a fixed position in the rotational direction of the platen, and the movement of the rotary lever moves the recording head to the crimping position or the crimping release position. A color thermal transfer type recording device characterized by being driven to move. (2) A toggle mechanism is formed by the rotating lever,
2. A color thermal transfer type recording apparatus according to claim 1, wherein said toggle mechanism is configured to move said recording head. (3) The color thermal transfer recording device according to claim 1 or 2, wherein the platen side engaging portion of the rotary lever is made of a high friction elastic material such as rubber. (4) The collar according to claim 1 or 2, wherein the platen side rotating portion and the platen side engaging portion of the rotary lever are engaged with each other by a gear and a sector gear. Thermal transfer type recording device.