JPH0120134Y2 - - Google Patents

Description

[Detailed Description of the Invention] (A) Technical Field of the Invention The present invention relates to a printing device using an endless ink ribbon, and particularly relates to a ribbon feed device that smoothly folds the ink ribbon.

(B) Technical Background Figures 1 and 2 are schematic illustrations of an embossing line printer.

In the figure, 1 is an ink ribbon, 2 is a printing paper sent by a paper feed tractor 3, 4 is a type belt, 5 is a platen, 6 is a printing hammer, 7 is a drive pulley, 8 is an idler pulley, and 9 is a folding ink ribbon. A ribbon feed roller 10 is an ink ribbon storage chamber.

In the above-described configuration, the paper feed tractor 3 supplies the printing paper 2 to the printing hammer 6 from a hopper (not shown).

Then, printing is performed by selectively selecting a printing hammer 6 and striking the type on the type belt 4.

(C) Prior Art and Problems Conventionally, in such printing devices, an endless ink ribbon is used, and this endless ink ribbon is folded by a ribbon feed roller 9 as shown in FIG. The ink ribbon is stored in the ink ribbon storage chamber 10.

Here, the ink ribbon 1 needs to be neatly folded within the ink ribbon storage chamber 10. In other words, if the ink ribbon 1 is not folded neatly, its folded volume increases, the pressure on the inner wall of the ink ribbon storage chamber 10 increases abnormally, and the ink ribbon 1 is not pulled out from the ink ribbon storage chamber 10. It disappears.

Therefore, during the printing operation, the printing hammer 6 repeatedly hits the same location on the ink ribbon 1, resulting in a thin print. Moreover, in the worst case, the ink ribbon 1 may have a hole.

For this reason, conventionally, in order to fold the ink ribbon 1 stably, a silicone coating is applied to the bottom of the ink ribbon storage chamber 10 to reduce the coefficient of friction, a material with a small coefficient of friction is used, or By finishing the surface well or tilting the ink ribbon storage chamber 10, the flow of the ink ribbon 1 is improved and the folding is performed smoothly. However, in the former case, the ink impregnated in the ink ribbon is As a result, the coefficient of friction is no longer constant over the entire bottom of the ink ribbon storage chamber 10, and folding cannot be performed smoothly. It is also conceivable to perform silicone coating every time the ink ribbon is replaced, but this has the disadvantage that the work is very troublesome. In the latter case, in the ink ribbon storage chamber 10,
The ink ribbon 1 falls forward, and the ribbon cannot be pulled out in a normal state. Specifically, the ribbon may be pulled out in a twisted state. Another drawback was that if the bottom was scratched, the effectiveness would be significantly reduced.

(D) Purpose of the invention The purpose of the present invention was made in view of the above-mentioned drawbacks, and is to provide a ribbon feed device that can neatly fold an ink ribbon within an ink ribbon storage chamber.

(E) Structure of the invention According to the invention, the object is to provide an ink ribbon storage chamber that stores an ink ribbon, a ribbon feed roller that folds and feeds the ink ribbon from the printing section into the ink ribbon storage chamber, and an ink ribbon storage chamber that stores the ink ribbon. A bottom sheet is provided at the bottom of the ribbon storage chamber, has a bent portion at the tip, and is made of a material with a low coefficient of friction with the ribbon, and is provided at the bottom of the ribbon feed roller and engages with the bent portion of the bottom sheet. This is achieved by providing a ribbon feed device comprising a lower plate having an engaging portion, and the bottom sheet is configured to be replaceable.

(F) Embodiments of the invention Hereinafter, embodiments of the invention will be described in detail using drawings.

FIG. 3 is a diagram for explaining an embodiment of the present invention. In the figure, an ink ribbon accommodating section 10 is fixed to the printing device, and only the ink ribbon 1 is configured to be replaceable.

This figure shows a pack 11 containing a new ink ribbon 1 being set in the apparatus and the ink ribbon 1 being stretched around it.

FIG. 4 is a diagram for explaining one embodiment of the present invention. In the figure, 1 is an ink ribbon storage chamber;
9 is a ribbon feed roller; 12 is a plate provided at the bottom of the ribbon feed roller 9; 12a;
13 is an engagement hole provided in the plate 12, 13 is a slide sheet which is the bottom sheet of the ink ribbon storage chamber, and 13a is a bent portion provided at the tip of the slide sheet 13 to engage with the engagement hole 12a.

In the above-described configuration, for example, as shown in FIG. 3, when the pack 11 is set in the apparatus and the ink ribbon is replaced, the slide sheet 13 is pulled out from the plate 12 and the bent portion 13a of the new slide sheet 11 is removed. the plate 1
2 and replace it by engaging with the engagement hole 12a of No.2.

Therefore, since the bottom sheet is replaced at the same time as the ink ribbon 1 is replaced, the ink ribbon always flows smoothly and the ink ribbon is neatly folded within the ink ribbon storage chamber. Further, since it is only necessary to hook the slide sheet into the engagement hole, the operability is significantly improved. As the slide sheet, it is effective to use, for example, paper coated with silicone.

FIGS. 5a and 5b are diagrams for explaining another embodiment of the present invention. FIG. 5b is an enlarged view of the main part. In the figure, 1 is a ribbon storage chamber, 9 is a ribbon feed roller, 12 is a plate, 14 is a plurality of stacked slide sheets, 15 is a sheet presser that holds the slide sheet 14, and 16 is a screw.

In the configuration as described above, the ink ribbon 1
At the same time as replacing the slide sheet 14, pull out the slide sheet 14 and replace it with a new one.

Therefore, since the bottom sheet is replaced at the same time as the ink ribbon 1 is replaced, the ink ribbon always flows smoothly and the ink ribbon is neatly folded within the ink ribbon storage chamber.

In addition, since the slide sheet only needs to be removed, operability is significantly improved.

(G) Effect of the invention As explained above, according to the invention, the bottom sheet of the ink ribbon storage chamber can be replaced extremely easily when replacing the ink ribbon, and the surface condition of the bottom of the ink ribbon storage chamber is always in a state with a low coefficient of friction. Therefore, the ink ribbon can always be folded in an orderly manner.

[Brief explanation of the drawing]

Figures 1 and 2 are diagrams for explaining the outline of an embossing type line printer device, Figure 3 is a diagram for explaining an embodiment of the present invention, and Figure 4 is a diagram for explaining an embodiment of the present invention. FIG. 5 is a diagram for explaining another embodiment of the present invention. In the figure, 1 is an ink ribbon, 9 is a ribbon feed roller, 12 is a plate, 13 and 14 are slide sheets, and 15 is a sheet presser.

Claims (1)

[Scope of utility model registration request] an ink ribbon storage chamber for accommodating the ink ribbon;
A ribbon feed roller that folds and feeds the ink ribbon from the printing section into the ink ribbon storage chamber, a bottom sheet provided at the bottom of the ink ribbon storage chamber and having a folded portion at the tip, and a bottom sheet provided at the bottom of the ribbon feed roller. and a lower plate having an engagement hole that engages with a folded portion of the bottom sheet, and the bottom sheet is configured to be replaceable.