JPH0289670A - Printer device - Google Patents

Abstract

PURPOSE:To enable stable positioning by abutting the front end of photographic printing paper against a lever at a place, where photographic printing paper is made header than a first roller contact-bonding and supporting photographic printing paper to a platen roller, and correcting the front end of photographic printing paper so as to run parallel with the platen roller. CONSTITUTION:Photographic printing paper 5 is pushed against a platen roller 7 by a pressure roller 18a, the front end of photographic printing paper 5 inclined is abutted against one of positioning levers 30 born to the platen roller 7 by a spring 32 when the paper 5 proceeds by the frictional force of the platen roller 7, and a slip is generated between photographic printing paper 5 and the platen roller 7, and the front end of the photographic printing paper 5 is brought into contact with both positioning levers 30. When photographic printing paper 5 is detected by a sensor 37 and a motor 15 is stopped, photographic printing paper 5 is pushed and held in parallel with the platen roller 7. When the positioning levers 30 are rocked in the direction of the arrow C and the motor 15 is turned, photographic printing paper 5 is moved forward to a thermal head 4 under the state in which an inclination thereof is corrected, and the paper 5 is printed.

Description

Detailed Description of the Invention <Industrial Field> The present invention relates to a thermal transfer printer in which photographic paper and an ink sheet are held between a platen roller and a thermal head, and images are printed on the photographic paper by the thermal head. Regarding the apparatus, in detail, it relates to [)M for preventing the photographic paper and the printing position from being in the rI direction.

<Prior Art> Conventionally, as this type of printer device, the one shown in FIG. 3, for example, is known.

In the conventional printer device B mentioned above, as shown in the same figure, a thermal head 4 having a plurality of heating elements arranged in a line is attached to an arm 4a, and this arm 4a has a 1l
It is swingably supported by the QI 14b. A pin 13 is attached to the arm 4a, and is slidably fitted into a spiral cam groove 6a on the side surface of the cam 6.

The cam 6 is rotationally driven by the motor 9, and the thermal head 4 is driven to swing in the direction of arrow 8 about the shaft 4b.

A platen roller 7 that supports the photographic paper 5 on its outer peripheral surface is rotatably arranged at a position facing the thermal head 4, and a color ink sheet is disposed between the platen roller 7 and the thermal head 4. l is deployed.

The color ink sheet 1 is formed by arranging a plurality of types of ink of different colors on a base material in a plane-sequential manner. The color ink sheet 1 wound around the supply row/V2 is then wound onto the take-up roll 3 at the same time as printing is completed.

In addition, the insertion opening portion is provided with vertical guides 20 and 21 for the photographic paper 5.
A lateral guide 24 (FIG. 4), which is slightly wider than the photographic paper 5, is provided to transport the photographic paper. Roller 22.2
3 is disposed at the end of the guide, and the roller 22 is rotatably interlocked with the platen roller 7 by a gear (not shown).

Around the platen roller 7, a plurality of rollers 18 a
l l 8 b+ . . . are pressed toward the center of the platen roller 7 and are rotatably arranged so as to press the photographic paper 5 against the platen roller 7.

Furthermore, guides 40, 41 are provided around the platen roller 7 with a suitable clearance from the platen roller.

When printing on the photographic paper 5 with the conventional printer device B having the above configuration, the photographic paper is inserted into the guide 20. It is frictionally transmitted by the rollers 22 and 23, guided by the guides 40 and 41, pressed against the platen loaf 7 by the advance roller 18a, and conveyed by the frictional force of the platen opening 2 and 7.
The thermal head 4 is further pressed by the roller 18b, moves downward, and the rear end of the photographic paper is detected by the sensor 26, and the motor 15 is stopped.

Then by rotating the motor 9. The thermal head 4 is lowered in the direction of the arrow 8 and the printing paper 5 and color ink sheet l are moved by the thermal head 4 and the platen roller 7.
to hold. Next, an image is printed on the photographic paper 5 by energizing the thermal head 4 while rotating the motor 15 and the color ink sheet winding motor 27. When printing of the first color is completed, the thermal head 4 is driven to swing upward slightly, the motor 15 is rotated, and the printing paper 5 is sequentially pressed against the platen roller 7 by a pressure roller and conveyed, and the rear end is detected by a sensor 26. The image will be printed in the same way as the first color.

<Problems to be Solved by the Invention> In the conventional printer device B described above, the photographic paper 5 is only guided in the horizontal direction by the guides 24 and 25 (FIG. 4) in the insertion slot, so the guide and the photographic paper The photographic paper winds diagonally around the platen roller due to the horizontal play of
As shown in the figure, there is a problem that the printing position 5a is slanted with respect to the photographic paper 5.Furthermore, if the shape of the photographic paper is the same in width but short in length, the amount of slanting becomes even larger. there were.

SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide a printer device having a function of preventing the printing position from being tilted even when using photographic paper having a shorter aspect ratio of 6t.

<Means for Solving the Problems> The means adopted by the present invention to achieve the above object is that the photographic paper inserted from the insertion slot is advanced beyond the first roller that presses the photographic paper to the platen roller and reaches the second roller. Using a pair of levers that allow the leading edge of the photographic paper to come into contact with the roller before it is pressed, the leading edge of the photographic paper is brought into contact with one of the levers, and then the platen roller is further rotated to cause the photographic paper and the platen roller to slip, allowing the photographic paper and the platen roller to slip. This is to correct the inclination of the photographic paper that was inserted diagonally into the first roller by bringing the photographic paper into contact with the first roller so that it is parallel to the platen roller, and then releasing the lever from the contact. .

Function: The photographic paper inserted diagonally is pressed by the first roller as the platen roller rotates, and the photographic paper advances due to the frictional force with the platen roller, and the photographic paper comes into contact with a pair of levers, causing the photographic paper to Since the platen roller is pressed by one (or a pair of) rollers, the frictional force is small and slips, and the left and right sides of the photographic paper come into contact with both levers, making the photographic paper parallel to the platen roller. Next, by swinging the lever and releasing it from the photographic paper, the photographic paper whose inclination has been corrected is also pressed against the second pressing roller and advances. In this state, the photographic paper is wrapped around the platen roller and will not tilt.

・<Example> Hereinafter, with reference to FIGS. 1 and 2, five embodiments of the present invention will be described.

1 and 2 show a schematic configuration of a printer device according to an embodiment of the present invention. FIG. 1 is a side view of the printing paper 5 during positioning operation, and FIG. 2 is a side view of the printing paper 5. A plan view at the moment when the peak is being corrected is shown.

As shown in FIG. 1, the printer device A according to this embodiment has almost the same basic structure as the conventional printer device B,
The difference is that a pair of positioning levers 30 that can swing around a pin 31 are provided between the first pressure roller 18b and a spring 32. The pin 33 is fixed to the lever 35 which swings around the pin 34 as a fulcrum, and the pin 36 fixed to the other end of the lever 35 is attached to the cam 6. spiral groove 6
b, and is configured to swing the lever 30 in the direction of arrow C by rotating the cam 60 times, and furthermore, the first roller 18a
A sensor 37 for detecting photographic paper 5 is located between the lever 30 and the lever 30.
is placed.

In the operation of the printer device configured as described above, the photographic paper 5 is inserted between the guides 20 and 21, and the paper feed rollers 22, 23 and the platen roller 7 driven by the motor 15 are rotated.

The photographic paper 5 is advanced by the frictional force of the paper feed roller 22, and the photographic paper 5 is advanced by the guide 40. The photographic paper 5 is advanced between the guides 41 and is pressed against the platen roller 7 by the pressure roller 18a, and is advanced by the frictional force with the platen roller 7. (FIG. 1 shows this moment.) At this stage, the photographic paper 5 is only guided laterally by the insertion guides 24 and 25 and is oblique to the center of the platen roller 7. FIG. 2 is a plan view showing this moment. Further, as the photographic paper 5 advances, the tip of the tilted photographic paper 5 is moved to the platen roller 7 by the spring 32.
The positioning lever 30 is in contact with one side of the positioning lever 30, which is in contact with the other positioning lever 30.

At this time, the pin 31 is located at a position where the positioning lever 30 does not swing due to the advancing force of the photographic paper 5, and the advancing force of the photographic paper 5 is only the frictional force due to the pressing force of the roller 18.
(If the photographic paper 5 is corroded, the roller 20 is also affected.) A slip occurs between the photographic paper 5 and the platen roller 7, and the leading edge of the photographic paper 5 comes into contact with both positioning levers 30 and slips.

After the sensor 37 detects the photographic paper 5, the motor 15 is stopped, the leading end is regulated by both positioning levers 30, and the photographic paper 5 is pressed and held by the platen roller 7 in parallel with the platen roller 7 by the roller 18a. Next, motor 9
is rotated, and the positioning lever 30 is swung in the direction of arrow C via the cam 6° lever 35.

Next, when the motor 15 is rotated, the photographic paper 5 is also pressed against the roller 18b without contacting the positioning lever 30.
In the state e in which the inclination has been corrected, it advances to the thermal head 4 and prints as shown using FIG. 3.

The spiral groove of the cam 6 is set so that when the first color printing is completed and the thermal head 4 is oscillated slightly upward, the positioning lever 30 is maintained at a position away from the platen roller 7, The groove is configured so that the lever 5 does not come into contact with the lever 30 when it passes the lever 30 for the second time and thereafter.

<Effects of the Invention> As described above, the present invention has a method in which the photographic paper is placed on the platen roller.
After the photographic paper is compressed and supported by a set of compression rollers, the tip is applied using a positioning lever to correct the inclination, and compared to positioning the photographic paper using a guide before inserting it into the platen roller, stable positioning is achieved. It is possible.

Furthermore, even if the aspect ratio of photographic paper is short in the vertical direction, the tilt can be corrected.

Also, when the printing or paper comes into contact with the positioning lever, it is necessary to cause the platen roller to slip between the platen roller and the photographic paper, but at that time, only one set of platen roller suppression rollers is pressed, and the photographic paper does not touch the platen roller. Since this is before the roller is wrapped and the wrapping angle is small, the platen roller can be operated without increasing the torque of the motor for driving it.

Furthermore, the power to swing the positioning lever can be generated using a motor and a cam to move the thermal head up and down, allowing reliable operation without adding many parts. Prints can be made without tilting.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment of a printer device of the present invention, FIG. 2 is a schematic plan view showing the operation of an embodiment of a printer device of the present invention, and FIG. 3 is a schematic configuration of a conventional printer device. 4 is a view in the direction of arrow A in FIG. 3, and FIG. 5 is an explanatory diagram showing photographic paper and printing positions in the apparatus shown in FIG. 3. In the drawing, 5 is photographic paper, 7 is a platen roller, and 30 is a pair of positioning levers.

Claims (1)

[Claims] 1. A pair of levers are provided at a position where the photographic paper advances beyond the first roller that presses and supports the photographic paper against the platen roller, and the leading edge of the photographic paper comes into contact with and can be released, and the leading end of the photographic paper is brought into contact with the levers. . A printer device that is capable of correcting the leading edge of the photographic paper so that it is parallel to the platen roller by rotating the platen roller and causing the photographic paper and the platen roller to slip.