JPS5919181A - Thermal transfer recording apparatus - Google Patents

Abstract

PURPOSE:To prevent the wrinkle generation of an ink sheet, by a method wherein an idler roller in pressure contact relation to a platen is provided to the ink sheet supply side of the platen roller in a thermal transfer type line printer and an ink sheet is supplied from said idler roller. CONSTITUTION:In a line printer wherein an ink sheet 3' and printing paper are supplied between a platen roller 2 and a printing head 1 formed by parallelly providing heat generating elements to the roller shaft of said platen roller 2 in a superimposed relationship to perform thermal transfer recording, an indler roller 5 is provided to the supply side of an ink sheet 3' of the platen roller 2 to be lightly brought into contact with the platen roller 2. In this state, the ink sheet 3' is withdrawn from an ink sheet roll 3 to be supplied to the platen roller 2 through the idler roller 5. Printing paper is supplied between the ink sheet 3' and the platen roller 2 and the surface of the platen roller 2 is rotated in a state superimposed with the ink sheet 3' to carry out thermal printing by the printing head 1 pressed toward the platen roller 2.

Description

[Detailed Description of the Invention] Technical Field> The present invention relates to a thermal transfer recording device. This invention relates to a device that melts and transfers ink from an ink sheet to a recording paper by generating heat from a head.

BACKGROUND TECHNOLOGY In this type of device, if it is a so-called fin board type in which dots are arranged horizontally in a row with approximately the same length as the width of the recording paper and ink sheet, such a device is used. It is difficult to feed an ink sheet between a long-width thermal head and a platen without wrinkles, and this often results in a decrease in recording quality due to wrinkles.

The occurrence of wrinkles on an ink sheet is unique to the ink sheet. That is, an ink sheet consists of a sheet base of about 20 μm19 and ink adhered to it. When the sheet base is heated by a thermal head, the ink adhered to it melts and the sheet base is completely removed. , %IJ, wrinkles occur due to partial shrinkage of the sheet base. As in the case of the line head type as described above, when the width of the ink sheet increases, the wrinkles that occur tend to spread over the entire surface of the ink sheet.

<Disclosure of the Invention> In the present invention, a superimposed body of an ink sheet and a recording paper pulled out from an ink roll is brought into pressure contact between a thermal line head and a roller-shaped platen, and the superimposed body is formed by rotation of the putty. In the thermal transfer recording device C2, which pulls the ink sheet in from one side and sends it out to the other, the ink sheet is pressed down with a seed layer that prevents the shrinkage of the ink sheet and prevents the formation of undesired wrinkles. This was prevented.

〈Example〉 Figure 1C; Thermal line hair F in fixed arrangement as shown
(10: Rubber roller-shaped platen (2) is in pressure contact with the ink sheet pulled out from the ink sheet roll (3) (31 is the fixedly arranged first guide shaft (4) and the rubber floating roller ( C- enters between the platen (2) and the head (1) via the winding bobbin (8
).

Although not shown, a recording paper made of, for example, a single sheet of paper is inserted between the platen (2) and the ink sheet, and a stack of the recording paper and the ink sheet is pressed against the platen (2) and the head il+. Ru.

The power of a rotating head such as a motor is transmitted to the shaft (9) of the platen (21), and the platen (21 rotates clockwise (two rotations) in the figure. This causes the superimposed body to rotate between the platen and the head (6). : Sequentially drawn in and sent out to the opposite side of the sac.

Inkun-Troll t3+ can be rotated on fixed axis ill (
The supply bobbin 11υ (which is wound with nine pieces) is equipped with a hard resin step that is loosely passed through the fixed shaft ill. Consists of reel side plate +13 and cylinder time.Cylinder +
131 is fitted into the side plate (1.
9 (to engage with two) In the second side plate (rotates integrally with 4, supply bobbin; between the side plate Ω and the soft resin friction ring 0η is coaxial with these 6
: It is loosely inserted, and on the other hand, the fixed shaft (1 pull and 2 is pushed through, and the screw (1 pull and 2) fixes the pressing circle f'# (
11 is the outer surface of the reel side plate 0 χ pressure contact plate Oe side C; pressed with moderate pressure. The other end of the supply bobbin (■) is connected to a similar stepped reel side plate 021 (which is loosely held by the fixed shaft (IG). Therefore, by the feeding action of the platen (2), the ink sheet (3) is At this time, the ink note roll (31) is pulled out.
), a moderate amount of braking is applied to the rotation.

The floating roller (5) is supported by a pair of swinging arms (2), between the swinging tips of C2D (parallel to the nib platen (21)), and with two free rotation ends. The swing base end is pivotally supported by a fixed shaft 123 (:.
) is in contact with the platen 121+2 from its own f1+2, but the contact force of 7 (2 is the above own weight (=, floating loaf (5)
From the ink sheet roll side (two ink sheets) 13
1 of tension contributes at least. Fig. 6 shows this state, and if the tension on the C ink sheet roll side is T1 when viewed from the floating roller (5), the tension between the platen (2) and the floating roller (5) is the same as this. Tension T in the tangential direction
2 is generated, so the resultant force °r5 is the idler roller (
50, and part of it will be given to the concubine.

The rotating shaft of the take-up lipo pin (8) is rotated by the platen (21 j'), which is transmitted by the regular slip transmission mechanism 31! Only one winding is lost bobbin (8) (Two windings are taken.

With the above configuration, when the platen (2) rotates, the ink sheet (31 is ink sheet row - y + 31
Yo tj” It was brought out, Volume 11 Father Lipopin (Volume 81! Father Rane 3
The rotation of the ink sheet roller 11 is controlled by WII as described above, and as a result, tension is generated on the ink sheet 13τ of the ink roller 1il11 from the idler roller 15), and this tension is applied to the idler roller 151 as described above. Increase the pressure against the platen (2). Such pressure contact is carried out over the entire width of the ink sheet (31), thereby preventing shrinkage of the ink sheet that would otherwise occur at the head (1) portion, and greatly reducing the occurrence of wrinkles.

Effect〉 Invention′! Is the ignition caused by the superposition of the ink sheet and recording paper?・
- A thermal transfer recording device that presses between a maruffin head and a lobe-shaped platen, draws the superimposed body from one side by rotation of the platen, and sends it out to the other side (= ink jet, near the head). Since the structure is such that the shrinkage χ of the ink sheet can be prevented by pressing it down, the occurrence of undesired wrinkles on the ink sheet can be reduced by 11t.
Since it is used for various purposes, its configuration is extremely simple.

In this case, a separate spring mechanism is required, and in this case, the retracting operation of the idle roller for the initial section of the ink sheet becomes complicated.

[Brief explanation of drawings]

Figure 1 shows an embodiment of the present invention; Figure 1 is a perspective view (2);
Figures A and B are a front view and a perspective view of the main part, and Figure 6 is a side view. 111...To the thermal line, tsu)', (2+...
platen, (31... ink sheet roll, (51
...Idling roller.

Claims (1)

[Claims] (1) A thermal transfer recording device in which a superimposed body of an ink sheet and recording paper is brought into pressure contact between a thermal line head and a roller-shaped platen, and the platen is rotated: the superimposed body is pulled in from one side and sent out to the other side. , a floating roller supported by two C between the swinging tips of a pair of swinging arms is parallel to the platen (two arranged,
The ink sheet pulled out from the ink sheet roll is drawn between the platen and the head through the space between the platen and the idle roller, and the tension of the ink sheet on the ink roll side than the AZ Jtt roller is applied to the idle roller. A thermal transfer recording device characterized by a small contact force against the platen.