JPS6014601Y2 - Ink ribbon traveling device in printing equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an ink ribbon traveling device for a printing device such as a line printer.

For example, in a printing device in which a type conveyor such as a type belt or a type train and an endless ink ribbon run in the same horizontal direction along a printing position, a fixed ribbon is placed on both sides of the printing position as a ribbon guide to guide the movement of the ink ribbon. Although a guide is used, the structure adds ribbon tension that is unnecessary for printing quality functions, which increases the amount of slip between the ink ribbon and the take-up roller, such as a rubber roller, and shortens the life of the take-up roller. Although it has the disadvantage of being short, this will be explained with reference to FIG.

The type conveyor 3 is caused to run horizontally along the printing position by a driving pulley 1 and a driven pulley 2.

Furthermore, the endless ink ribbon 9 stored in the ribbon cassette 8 installed in front of the printing position is connected to the fixed ribbon guides 10 and 13 shown in the second figure installed on both sides of the printing position.
The ribbon is caused to run along the printing position in the same horizontal direction as the type carrier 3, and is stored in the ribbon cassette 8 by the winding rubber roller 7.

The printing paper 5 is attached to the ink ribbon 9 by the printing hammer 6.
By striking the anvil 4 together with the type carrier 3, the unillustrated characters on the type carrier 3 are transferred to the printing paper 5.
transferred on top.

In order to prevent the ink ribbon 9 from being lifted up during multiple line feeds of paper, especially multi-copy paper, or to make the ink ribbon 9 run stably, the ink ribbon 9 is run while being pulled at a certain predetermined tension. I need to do it.

This can be achieved by using the frictional resistance of the tension mechanism 80 of the ribbon cassette 8 and the right ribbon guide 10, and this is a well-known technique and has already been adopted.

In other words, it is sufficient to apply tension to the ink ribbon 9 in the ribbon running section before entering the printing position, and adding tension to the ribbon running section after passing through the printing position is unnecessary in terms of printing quality.

In the conventional apparatus shown in FIG. 1, the left ribbon guide 13 is also fixed, so the frictional resistance between the ink ribbon 9 and the ribbon guide 13 causes this unnecessary tension to be dissipated.

If the tension is higher than necessary, move the ink ribbon 9 to the rubber roller 7.
This increases the amount of slip between the rollers and accelerates the wear of the rubber roller rough.

As described above, the ink ribbon traveling device shown in FIG. 1 has the disadvantage that the life of the rubber roller 7 is shortened.

The purpose of the present invention is to eliminate the above-mentioned drawbacks of the prior art and to extend the life of the take-up reroller by preventing unnecessary tension from being applied to the take-up roller.

The present invention has a rotatable ribbon guide installed near the take-up reroller, that is, on the ribbon inlet side of the ribbon cassette, to reduce the frictional resistance between the ink ribbon and the ribbon guide, thereby reducing the frictional resistance on the ink ribbon. The feature is that the necessary tension is not applied.

FIG. 4 shows an embodiment of the present invention, in which the rubber roller 7
The left ribbon guide 20 installed near the ribbon cassette 8, that is, on the ribbon entrance side of the ribbon cassette 8, is rotatably attached to a shaft 22 attached to a holder 21 attached to the base plate 12 via screws 11, as shown in FIG. The guide roller 23 and the like mounted thereon are used to guide the ink ribbon 9 as it travels.

As a result, tension unnecessary for the printing function is not applied to the ink ribbon 9 that has passed the printing position, so the amount of slip between the ink ribbon 9 and the rubber roller 7 is reduced, and as a result, the wear between the rubber rollers 7 is reduced. Therefore, the life of the rubber roller 7 is more than twice as long as that of the conventional rubber roller.

As described above, according to the present invention, more than necessary tension is not applied to the take-up reroller, so the amount of slip between the ink ribbon and the take-up roller is reduced, and the life of the take-up roller can be extended.

[Brief explanation of the drawing]

Figure 1 is a plan view showing an example of a conventional general printing device;
3 is a front sectional view of a fixed type ribbon guide, FIG. 3 is a front sectional view of a rotary ribbon guide of the present invention, and FIG. 4 is a plan view showing an embodiment of a printing device to which the device of the present invention is applied. In the figure, 7 is a take-up roller, 8 is a ribbon cassette,
9 is an ink ribbon, 10.13 is a fixed ribbon guide,
20 is a rotary ribbon guide, and 23 is a guide roller.

Claims (1)

[Scope of utility model registration request] an endless ink ribbon stored in a ribbon cassette and running horizontally along the printing position; a take-up roller provided on the ribbon inlet side of the ribbon cassette to wind the ink ribbon; and at least an endless ink ribbon on both sides of the printing position. In the printing device, the ribbon guide installed on the ribbon exit side of the ribbon cassette is a fixed ribbon guide that cannot rotate, and the ribbon guide is installed on the ribbon entrance side of the ribbon cassette. An ink ribbon traveling device characterized in that the ribbon guide is a rotatable ribbon guide.