JPH01176575A - Printer - Google Patents

Abstract

PURPOSE:To enable a color ink sheet to be effectively wound around a winding roll for a short time, by a method wherein a clutch mechanism is provided between a driving means and the winding roll, and the winding roll is directly driven by a driving means by switching a clutch mechanism when the ink sheet is wound. CONSTITUTION:When a winding roll 3 is rotatively driven with a motor, a color ink sheet 1 is wound on a winding roll 3 until the top part of a following color corresponds to a position opposed to a thermal head 4. In that case, a conduction ring 41 is shifted to be driven downward with a shifter pin 18 swung to be driven by a solenoid 5 in a clutch mechanism E. Then, a clutch part 39 of a gear 30 is engaged with a clutch part 40 of the conduction ring 41 to drive a conduction wheel 23 by direct connection with the motor and thereby, the color ink sheet 1 is wound on the winding roll 3 at high speed.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention involves sandwiching photographic paper and, for example, a color ink sheet wound up on a take-up roll between a platen roller and a thermal head, and printing the above-mentioned print by the thermal head. The present invention relates to a thermal transfer printer that prints on paper, and specifically relates to a mechanism for transmitting driving force to the take-up roll.

[Prior art]

Conventionally, as this type of printer device, for example, those shown in FIGS. 3 and 4 are known.

In the conventional printer device B described above, as shown in the figure, a thermal head 4 having a plurality of heating elements arranged in a line is attached to an arm 41, and this arm 4a is
It is swingably supported by a shaft 4. Arm 4 above
A pin 13 is attached to &, and this pin 13 is slidably fitted into a spiral cam groove 6□ carved on the side surface of the cam 6. As the cam 6 is rotationally driven by the motor 9, the thermal head 4 is driven to swing in the direction of arrow 8 about the shaft 4.

At a position facing the thermal head 4, a platen roller 7 for supporting the photographic paper 5 on its outer peripheral surface is rotatably provided. An ink sheet 1 is provided.

The color ink sheet 1 is formed by arranging a plurality of types of inks of different colors in a plane-sequential manner on a base material. The color ink sheet 1, which has been passed around the supply roll 2, is sequentially wound up onto the take-up roll 3 at the same time that printing is completed. The take-up roll 3 is frictionally driven by a drive mechanism not shown.

Therefore, when printing on the photographic paper 5 with the conventional printer device B having the above configuration, the thermal head 4 is lifted upward by rotating the motor 9, and the thermal head 4 and the platen roller 7 are used to print the photographic paper 5 and the color. The ink sheet 1 is clamped (first state, see FIG. 4). Then, the rotation of the motor in the drive mechanism is controlled by the winding roll 3.
Tension is applied to the color ink sheet 1 by frictional transmission, and printing is performed on the photographic paper 5 by the thermal head 4.

When printing of the first color is completed, the thermal head 4 is driven to swing slightly downward as shown in FIG.
The color ink sheet 1 is no longer held between the platen roller 7 and the thermal head 4 via the platen roller 7 (second state). The color ink sheet 1 is then wound up by the take-up roll 3 until the leading end of the next color comes to a position facing the thermal head 4 by friction transmission driving of the take-up roll 3 by the drive mechanism.

Then, when the leading edge of the next color reaches a position facing the thermal head 4, the thermal head 4 is again driven to swing upward, and printing of the second color on the photographic paper 5 is performed.

Incidentally, when replacing the color ink sheet 1, the thermal head 4 is further oscillated downward from the second state shown in FIG. 3, and a large space is formed between the platen roller 7 and the thermal head 4. (third state).

[rn<] which the invention seeks to solve

However, in the above conventional printer device B, since the take-up roll 3 is driven by friction transmission by the drive mechanism even when the color ink sheet 1 is wound onto the take-up roll 3, the take-up roll 3 may slip. , color ink sheet 1
cannot be wound efficiently. Therefore, there is a problem in that the time required to cue each color of the color ink sheet 1 during printing becomes long, and the overall printing time becomes long.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a printer device having a function of efficiently winding up a color ink sheet onto a take-up roll in a short time, for example, when winding up a color ink sheet. be.

(Means for solving issue j'M) In order to achieve the above object, the main means adopted by the present invention is to provide a drive for rotationally driving a take-up roll for winding an ink sheet. In the plink device, the ink sheet and photographic paper are held between a platen roller and a head during printing, and the head prints on the photographic paper by imparting tension to the ink sheet by frictionally transmitting the rotation of the means. The printer device is characterized in that a clutch mechanism is provided between a drive means and a take-up roll, and when an ink sheet is taken up, the clutch mechanism is switched so that the take-up roll is directly coupled and driven by the drive means. .

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples embodying the present invention will be described below with reference to the accompanying drawings to provide an understanding of the present invention. It should be noted that the following examples are examples embodying the present invention, and are not intended to limit the technical scope of the present invention.

Here, FIGS. 1 and 2 show a schematic configuration of a printer device according to an embodiment of the present invention, and FIG.
) is a side view of the ink sheet in the wound state (bl is a side view of the C arrow in the same figure (al), the same figure (C1 is a longitudinal cross-sectional view in bl, FIG. 2 (al is A side view in a printed state, the same figure (bl is a side view of the D arrow direction in the same rl!JfMl, and the same figure FC+ is a longitudinal cross-sectional view in the same figure ('b).

Further, the same reference numerals will be used to describe the same elements as those of the conventional plink device B shown in FIGS. 3 and 4.

The printer device A according to this embodiment is shown in FIG. 1(a),
(b), tel and Figure 2 (a), (tel, (
As shown in C), the basic structure is almost the same as that of the conventional printer B, and the difference with this printer B is a motor (drive means, not shown) for rotationally driving the take-up roll 3 and a winder. A clutch mechanism E is provided between the take-up roll 3, and when winding, for example, a color ink sheet 1 onto the take-up roll 3, the clutch mechanism E is switched to directly drive the take-up roll 3 by the motor. This is what I did.

In the above clutch mechanism E, FIG. 1 ta), [bl,
As shown in (C), a transmission wheel 23 for mounting the winding roll 3 is attached to a shaft 22, and this shaft 22 is
It is rotatably supported by the holder 21 on the frame 46.

Below the shaft 22 are first and second bosses 35 and 3.
6 is integrally attached, and this first boss 35
A gear 30, which is rotatably driven by a motor (drive means) not shown, is arranged in the center of the gear 30 so as to be slidable and rotatable. The lower surface of the gear 30 and the transmission plate 3 of the first boss 35
A friction material 32 is interposed between the upper surface of the gear 30 and the lower surface of the movable friction plate 34 . The movable Y rod plate 34 is supported so as to be slidable in the vertical direction above the first boss 35, and is always elastically biased downward by a spring 38.

A transmission ring 41 is disposed on the outer side of the second boss 36 so as to be slidable in the vertical direction, and is always elastically biased upward by a spring 37.

A clutch portion 40 is provided at the lower end of the transmission ring 41.
is formed, and this clutch portion 40 is connected to the gear 3.
It is possible to engage with a clutch portion 39 formed on the upper surface of 0. Furthermore, a plurality of pins 43 are implanted at the upper end of the transmission ring 41, and these pins 43 are connected to the second boss 36.
It is slidably fitted into a through hole 44 □ formed in the collar 44 of.

In the annular groove 45 formed on the outer side of the transmission ring 41,
A shifter pin 18 is slidably fitted, and the shift turbine 18 is connected to the fixing metal fitting 1 via the switching lever 17.
It is swingably supported by a shaft 20 on top of 9. The shift turbine 18 is driven to swing about the shaft 20 by the solenoid 15 together with the switching lever 17 .

The printer device A is configured as described above.

Therefore, when printing on the photographic paper 5, the rotation of the motor 9 causes the thermal head 4 to swing upward, and the color ink sheet 1 is transferred together with the photographic paper 5 to the platen roller 7.
and the thermal head 4. Then, printing is performed on the photographic paper 5 by the thermal head 4 (see FIG. 2 fill).

At this time, in the clutch mechanism E, as shown in Fig. 2fb)
As shown in (C), the transmission ring 41 is slid upwardly and held by the shift turbine 18 which is swing-driven by the solenoid 15. As a result, the clutch portion 39 of the gear 30 and the clutch portion 40 of the transmission ring 41 are disengaged, and rotation of a motor (not shown) is frictionally transmitted to the transmission ring 23. The color ink sheet 1 is then tightly wound around a take-up roll 3, and tension is applied to the color ink sheet 1.

Incidentally, the transmission path of the rotational force of the motor to the transmission wheel 23 in this case is as follows.

That is, the gear 30, the friction material 32, 33, the transmission plate 31, the movable friction plate 34, the first boss 35. Second boss 36, shaft 22
The rotational force of the motor is transmitted to the transmission wheels 23 in this order.

When the printing of the first color on the photographic paper 5 is completed, the motor 9 rotates in the opposite direction to swing the thermal head 4 downward a short distance, and the platen roller 7 and the thermal head are connected to each other via the photographic paper 5. 4 is released from holding the color ink sheet 1 (see FIG. 1(a)).

Subsequently, the take-up roll 3 is rotationally driven by a motor (not shown), so that the color ink sheet 1 is wound by the take-up roll 3 until the leading end of the next color corresponds to the position facing the thermal head 4. taken.

In this case, in the clutch mechanism E, as shown in FIG.
), tc+, the transmission ring 41 is slidably driven downward by the shift turbine 18 which is oscillatedly driven by the solenoid 15. Then, the clutch portion 39 of the gear 30 and the transmission I! The transmission wheel 23 is engaged with the clutch portion 40 of t41.
is directly connected and driven by a motor (not shown), so that the color ink sheet 1 is wound up on a winding roll 3 at high speed. As a result, the leading edge of the next color on the color ink sheet 1 reaches the position facing the thermal head 4 in a short time.

In this case, the transmission path of the rotational force of the motor to the transmission wheel 23 is as follows.

That is, the gear 30, the clutch part 39, the clutch part 40, the transmission ring 41, the pin 43, the collar 44, the second post 36, the shaft 2
2. The rotational force of the motor is transmitted to the transmission wheel 23 in this order.

Therefore, in the printer device A, when printing on the photographic paper 5, the color ink sheet 1 is wound tightly around the take-up roll 3 by friction transmission driving of the take-up roll 3. Tension is applied to the

On the other hand, when winding up the color ink sheet 1 or cueing other colors on the color ink sheet 1, the winding roll 3 is directly connected and driven by the motor, so that the color ink sheet 1 is It is quickly and efficiently wound onto the winding roll 3 in a short period of time.

〔Effect of the invention〕

As described above, the present invention applies tension to the ink sheet by frictionally transmitting the rotation of a drive means for rotationally driving a take-up roll that winds up the ink sheet, and applies tension to the ink sheet and photographic paper during printing. In this printer device, a clutch mechanism is provided between the drive means and the take-up roll, and the clutch mechanism is activated when the ink sheet is taken up. This printer device is characterized in that the drive means is switched to directly drive the take-up roll, so that when winding an ink sheet, the ink sheet can be wound around the take-up roll efficiently and in a short time. You can take it.

[Brief explanation of the drawing]

1 and 2 show a schematic configuration of a printer device according to an embodiment of the present invention, FIG. 1 (tal) is a side view of the ink sheet in a wound state, and FIG. Same figure ta
1 is a side view of the section viewed from arrow C, FIG.
The same figure (bl is a side view of arrow D in the same figure ta+, the same figure (C) is a longitudinal sectional view in the same figure Cb), FIGS. 3 and 4
The figures each show a schematic configuration of a conventional printer device, with FIG. 3 being a diagram corresponding to FIG. 1(a), and FIG. 4 being a diagram corresponding to FIG. 2(a). [Explanation of symbols] 1... Color ink sheet 3... Take-up roll 4... Thermal head 5... Photographic paper 7... Platen roller A...
・Printer device E...clutch mechanism.

Claims (1)

[Claims] 1. Tension is applied to the ink sheet by frictionally transmitting the rotation of the drive means for rotationally driving the take-up roll that winds up the ink sheet, and the ink sheet and photographic paper are moved between the platen roller and the head during printing. In a printer device that prints on the photographic paper with the head while holding it,
A printer characterized in that a clutch mechanism is provided between the drive means and the take-up roll, and when an ink sheet is wound up, the clutch mechanism is switched so that the drive means directly drives the take-up roll. Device.