JPH0320125Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Application of the Invention) The present invention relates to an appropriate transfer device for a thermal transfer carbon ribbon used in a thermal transfer type thermal printer, and particularly relates to an appropriate transfer device for a thermal transfer carbon ribbon that can prevent meandering of the ribbon. .

(Prior art) Thermal transfer carbon ribbon (hereinafter simply referred to as "ribbon") used in thermal transfer type thermal printers
Since they are very thin, they meander during transport, causing problems such as wrinkles and poor printing in printed areas.

(Purpose of the invention) The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide an appropriate transfer device for a thermal transfer carbon ribbon that prevents the ribbon from meandering on the running path and improves printing quality. With the goal.

(Key points of the invention) That is, the present invention forms knurling at both ends of the ribbon guide roller, thereby preventing the ribbon from meandering.
This is an appropriate transfer device for thermal transfer carbon ribbon that prevents wrinkles.

(Example) Next, an example of the present invention will be described with reference to FIGS. 1 and 2.

The ribbon 1 wound into a roll is held on a supply shaft 2, and the fed-out ribbon is passed through guide rollers 3 and 4.
The film is then wound onto the winding shaft 5. The ribbon 1 is held between the platen 6 and the thermal head 7 together with the label 8, and printing is performed according to a predetermined print signal.

The label 8 is fed out from its supply shaft 9, passed through a thermal head 7, a platen 6, a guide roller 10, and then wound onto a take-up shaft 11.

The ribbon 1 and the label 8 are transported using a pulse motor 12 as a driving source, and a timing belt 13 and round belts 14 and 15 drive the platen 6 and take-up shafts 11 and 5, respectively. In addition, the winding shaft 5,
11 is provided with a slip mechanism so that the excess rotation of the ribbon 1 and label 8 causes them to slip.

In addition, a pair of guide rollers 16 and 17 are provided near the platen 6 on the running path of the ribbon 1, sandwiching the ribbon therebetween, and a round belt 18 is wound around the shaft of the guide roller 16 for driving and a pulse motor 12. It is designed to be suspended and driven. As shown in FIG. 2, this driving guide roller 16 has knurling 19 formed at both ends thereof, and the ribbon 1 is moved by increasing the frictional resistance compared to the part where the knurling 19 is not formed with the lower guide roller 17. By holding the ribbon 1, it is possible to prevent the ribbon 1 from meandering.

Next, the effect will be explained.

During the printing operation, the ribbon 1 moves to the thermal head 7.
A portion is printed and wound onto the winding shaft 5. However, when levering the ribbon 1, the pair of guide rollers 16,
17, and the left and right ends, which are not used for printing, are connected to the knurling 19 and the guide roller 17.
Since the paper is held in place with increased frictional resistance, it is introduced into the platen 6 and the thermal head 7 in an appropriate state without meandering, and print quality can be guaranteed.

In this embodiment, the case where only the ribbon 1 is held between the guide rollers 16 and 17 is illustrated, but
Both the ribbon 1 and the label 8 are placed on the guide roller 1.
A similar effect can be obtained by sandwiching it between 6 and 17. Further, although it is desirable that the pair of guide rollers be as close to the printed area as possible, they may be placed at any arbitrary position.

Further, although the guide roller for cutting the knurling is provided separately from the platen part, it is also possible to form the knurling in the part of the guide roller 4 that pinches and transports the platen 6, ribbon, and label 8, for example. Furthermore, although a driving example has been described as the guide roller, a driven roller (for example, the lower guide roller 17) that is not driven may also be used.

(Effects of the Invention) As explained above, according to the present invention, the ribbon is formed on the guide roller and the ribbon is reliably held by the knurls, thereby appropriately preventing meandering and wrinkling of the ribbon and ensuring printing quality.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram of an embodiment of the present invention;
FIG. 2 is an explanatory diagram of the guide roller. Explanation of symbols, 1... Ribbon, 2... Supply shaft,
3, 4... Guide roller, 5, 11... Winding shaft,
6...Platen, 7...Thermal head, 8...
Label, 12... Pulse motor, 13... Timing belt, 14, 15, 18... Round belt, 1
6, 17...Guide roller, 19...Knurling.

Claims (1)

[Scope of utility model registration request] A transport means for transporting the thermal transfer carbon ribbon from a supply shaft to a take-up shaft on a fixed running path, and a pair of guide rollers that sandwich the thermal transfer carbon ribbon are provided, and at least one of the guide rollers has knurling at both ends. An appropriate transfer device for a thermal transfer carbon ribbon, characterized in that it has the following characteristics: