JPH0247068A - Thermal transfer printer - Google Patents

Abstract

PURPOSE:To eliminate the reverse rotation of an ink ribbon and to accelerate a thermal transfer printing speed by forming a flat opposite part opposed planely to a thermal head on the part of the outer periphery of a platen roller. CONSTITUTION:A platen roller 25 is cut out partly on the outer periphery in a D-shaped section to form a flat opposite part 27 opposed planely to a thermal head 24. The opposite part 27 is opposed to the head 24 thereby to temporarily form a sufficient gap between the opposed faces to form a zigzag movement avoiding gap for an ink ribbon 26 to allow to always return the ribbon 26 to a proper position, thereby preventing the ribbon 26 from moving in a zigzag manner.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to a thermal transfer printing device that is internally configured in a ticket issuing device used, for example, in station service, and more specifically relates to a roller compatible structure suitable for thermal transfer. The present invention relates to a thermal transfer printing device that has evolved.

(b) Prior Art Generally, a thermal transfer printing apparatus has a thermal hand and a platen roller facing each other, and guides paper and an ink ribbon between them for thermal transfer.

In this case, if the opposing gap between the thermal head and the platen roller is too narrow, the contact resistance with the ink ribbon will be high and the ink ribbon will tend to meander, and if it is too wide, contact will be poor and thermal transfer will not be possible. Therefore, fine adjustment of this opposing gap was time-consuming and the gap could not be easily adjusted. Furthermore, when performing multicolor printing, 3
1! , In addition to backward conveyance, there was a problem in that the printing process required many operations, such as reversing the ink ribbon one by one.

(c) Problems to be Solved by the Invention It is an object of the invention to provide a thermal transfer printing device that allows easy gap adjustment and multicolor printing with fewer printing operations.

2) Means for Solving the Problems The present invention is a thermal transfer printing device in which a thermal head and a platen roller are brought into contact with each other, and paper and an ink ribbon are guided between them for thermal transfer. This is a thermal transfer printing device in which a planar facing portion that faces a thermal head in a planar manner is formed on a part of the outer circumferential surface.

(e) Effect of the invention According to this invention, one of the grating rollers during thermal transfer printing
Each time the platen roller rotates, the planar facing portion formed on the platen roller faces the thermal head, and a sufficient gap is temporarily formed between the facing surfaces, and this temporary gap serves as a meandering avoidance gap for the ink ribbon. Printing is performed with the ink ribbon always moved back to its normal position.

(f) Effects of the invention Therefore, meandering of the ink ribbon can be prevented, and a high-precision gap 21i1 between the thermal head and the platen roller can be created.
This eliminates the need for alignment, and for multi-color printing.

However, by creating a large gap between the flat opposing part and the thermal head, there is no need for the ink ribbon to reverse itself, and the thermal transfer printing processing speed can be reliably increased, increasing the thermal transfer processing capacity. Can be done.

(g) Examples An embodiment of the present invention will be described in detail below based on the drawings.

The drawing shows a ticket issuing device that issues tickets and commuter passes.
In FIG. 2, this ticket issuing device 11 includes, inside a device main body 12, a ticket issuing section 13 that issues low-durability paper, and a commuter pass issuing section 14 that issues highly durable sheet pieces.
A printing device 15 that prints ticket information, a data processing device 16 that writes valid data on the ticket, and a discharge conveyance path 18 that discharges tickets from each ticket issuing section 13.14 to a receiving tray 17' located outside the device. It is equipped with

In the above-mentioned ticket issuing unit 13, a roll paper 19 is held in a one-column paper holder 20 so as to be freely fed out, and one roll paper fed out from this is discharged and conveyed i'? The ticket is cut into a predetermined length by a cutter device 21 disposed in the middle of t18, and then guided to the printing device 15 at the subsequent stage.

On the other hand, in the commuter pass issuing unit 14, a large number of commuter pass sheets 22, which are pre-formed to the size of a commuter pass, are stored in a seat case 23 so as to be freely fed out, and the commuter pass sheets 22 fed out from this are discharged and transported. It is led via path 18 to a printing device 15 that is common to the ticket issuing section 13 described above.

As shown in FIG. 1, this printing device 15 has a thermal head 24 and a platen roller 25 facing each other, and between them a roll paper, a commuter pass sheet 22, and an ink ribbon 26.
This is a thermal printer using a thermal printing method that guides and thermally transfers the information, and prints the contents of ticket information corresponding to the ticket type on the surface of the ticket.

Incidentally, the above-described platen roller 25 has a section-shaped notch formed in a part of its outer peripheral surface to form a planar facing portion 27 that faces the thermal head 24 in a planar manner.

When the formed flat facing portion 27 faces the thermal head 24, a sufficient gap is temporarily formed between the facing surfaces, and this temporary gap becomes a meandering avoidance gap for the ink ribbon 26. , the ink ribbon 26 is always allowed to return to a proper position, and this serves to prevent the ink ribbon 26 from meandering.

The printed ticket is then led to the subsequent data processing device 16 via the discharge conveyance path 18, and this data processing device 1
At 6, the desired valid data is written via the write head 28 using magnetic encoding, and the data is read and verified by two magnetic read heads. Further, the defective read notes at this time are collected by the waste note collecting section 30, and the normal notes are ejected into the receiving tray 17 via the ejection conveyance path 18.

In the figure, 31 is a conveyance guide member, 32 is a conveyance roller, 33
34 is a conveyor belt, 34 is a collection and distribution plate, and 35 is a monitor section.

In the ticket issuing device configured in this way, an input signal for a train ticket or commuter pass is input and set based on the ticket issuing operation, and transaction data for the commuter pass or commuter pass is created based on this input signal. Ru.

Then, in the case of a commuter pass, the commuter pass sheet 22 is fed out from the commuter pass issuing section 14, and in the case of a train ticket, the rolled paper 19 is fed out from the ticket issuing section 13.

Then, predetermined ticket display information is printed on the fed out commuter pass sheet 22 or roll paper at the printing device 15.

At this time, for each rotation of the platen roller 25 during thermal transfer printing, the planar opposing portion 2 formed on the platen roller 25
7 faces the thermal head 24, a meandering avoidance gap is temporarily formed for the ink ribbon 26 between the opposing surfaces, and printing is performed while the ink ribbon 26 is always returned to its normal position.

Next, when valid transaction data is written in the data processing device 16, it is ejected to the receiving tray 17 via the ejection conveyance path 18.

As mentioned above, since marking Ir11 is performed with the ink ribbon always returned to its normal position, it is possible to prevent the ink ribbon from meandering, and it is necessary to adjust the gap with high precision between the thermal head and the platen roller. In addition, even in the case of multi-color printing, the flat opposing part faces the thermal head and forms a large gap, eliminating the need for reversing the ink ribbon and reliably speeding up the thermal transfer printing process. Thermal transfer processing ability can be improved.

In the correspondence between this invention and the structure of the above-mentioned embodiment, the thermal transfer printing device of this invention corresponds to the printing device 15 of the embodiment, and similarly, the paper is divided into the roll paper 19 and the commuter pass sheet 22. However, the present invention is not limited to the configuration of the above-described embodiment.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is an enlarged side view of the main parts of a printing device, and FIG. 2 is a schematic side view of a ticketing bag; d. 15... Printing device 19... Roll paper 22.
・・Commuter ticket sheet 24・・Thermal head 25・
...Platen roller 26...Ink ribbon 27...
・Plane facing part

Claims (1)

[Claims] (1) A thermal transfer printing device in which a thermal head and a platen roller face each other, and a paper and an ink ribbon are guided between them for thermal transfer, wherein a part of the outer circumferential surface of the platen roller is provided with a surface facing the thermal head. A thermal transfer printing device that has a flat opposing part formed thereon.