JPH0340613Y2 - - 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 that is not used in a thermal transfer thermal printer.
In particular, the present invention relates to an appropriate transfer device for a thermal transfer carbon ribbon that allows pressure adjustment between the ribbon and the drive roller.

(Prior Art) Conventionally, when transporting this type of thermal transfer carbon ribbon (hereinafter simply referred to as "ribbon"), a method of pinching and driving the printing paper or thermal transfer carbon ribbon using one drive roller and one pinch roller has been used. However, since the thermal transfer carbon ribbon is particularly thin, there are problems such as meandering during transportation and wrinkles or slips in the printed area.

Therefore, the pinching pressure by the drive roller/pinch roller needs to be adjusted with high precision, but in the past, since only one pinch roller was used, this adjustment was extremely difficult.

(Purpose of the invention) The present invention was developed in view of the above problems, and it is an aim to properly transport a thermal transfer carbon ribbon by making it possible to precisely adjust the roller pressure in the axial direction of the roller and uniformizing the tension of the ribbon. The purpose is to provide equipment.

(Key Points of the Invention) That is, the present invention is an appropriate transfer device for a thermal transfer carbon ribbon in which the pinch roller is divided into a plurality of parts in the axial direction, and each part can be adjusted independently.

(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 by a supply shaft 2, and the fed-out ribbon 1 is held by a guide roller 3,
Thermal head 4, platen 5, pinch roller 6
The film is then wound onto the winding shaft 7. The ribbon 1 is held between the thermal head 4 and the platen 5 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 4, a platen 5, 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 5 and take-up shafts 11 and 7, respectively. In addition, the winding shaft 7,
11 is provided with a slip mechanism so that the excess rotation of the ribbon 1 and label 8 causes them to slip.

FIG. 2 explains the details of the pinch roller 6. The pinch roller 6 is divided into three parts in the axial direction, and each is divided into three parts, 61, 62, and 63. Support frame 1 for each divided roller 61, 62, 63
6 are rotatable around a rotating shaft 17, and are each biased in the direction of the platen 5 by a spring 18.

The biasing force of these springs 18 is determined by the individual adjustment screws 19.
can be adjusted independently.

Incidentally, a reset lever 20 is provided near the support frame 16, and is adapted to move the pinch roller 6 portion toward and away from the platen 5 depending on its rotation. Therefore, the pressing force of each of the divided rollers 61, 62, 63 against the platen 5 can be independently adjusted by the respective adjustment screws 19.

Next, the effect will be explained.

During the printing operation, the ribbon 1 passes through the thermal head 4 and the pinch roller 6 and is wound onto the take-up shaft 7, but the pressure force of the pinch roller 6 is independent in the axial direction, that is, in the width direction of the ribbon 1. Since the tension is adjustable, the pressing force is made uniform, and when the ribbon 1 is transferred, the tension is made uniform and proper transfer is possible. If the pressing force of the left and right divided rollers 61 and 63 is made stronger than that of the central divided roller 62, tension can be applied in the lateral direction of the ribbon 1, and wrinkles can be more effectively prevented.
In this way, there is no left-right deviation in the transfer tension, meandering is prevented, and the occurrence of wrinkles, slips, etc. in the printed area is prevented.

Although this embodiment shows an example in which the roller is divided into three parts, it can be divided into any number of parts.

Moreover, although the platen has been described as an example of the driving roller, any roller can be used.

(Effects of the invention) As explained above, according to the invention, the pressing force of the thermal transfer carbon ribbon by the drive roller can be made uniform in the left and right direction, and the adjustment can be performed precisely and easily. It is possible to accurately prevent wrinkles and meandering.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of an embodiment of the present invention, and FIG. 2 is an explanatory diagram of the essential parts (FIG. 1 - line direction arrow view). Explanation of symbols, 1... Ribbon, 2... Supply shaft, 4... Thermal head, 5... Platen, 6... Pinch roller, 7... Winding shaft, 8... Label, 11... Winding shaft, 1
2... Pulse motor, 16... Support frame, 17... Rotating shaft, 18... Spring, 19... Adjustment screw, 20... Reset lever, 61, 62, 63... Division roller.

Claims (1)

[Scope of utility model registration request] In transferring the thermal transfer carbon ribbon wound into a roll from the supply shaft to the take-up shaft, a pinch roller that cooperates with a single transfer roller is divided into a plurality of parts in the axial direction, and each division is An appropriate transfer device for a thermal transfer carbon ribbon, characterized in that the contact pressure between the roll and the drive roller can be adjusted independently.