JPH0414217Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to an ink ribbon sub-cassette used in a ribbon case for storing an endless ink ribbon.

[Background of the idea]

Endless ink ribbons (hereinafter referred to as ink ribbons) used in impact printers and the like become scratched and smeared when used repeatedly, so their volume is gradually increased. Therefore, conventionally, ribbon cassettes have been manufactured with a storage volume that takes into account the expanded volume of the ink ribbon. For this reason, when an unused ink ribbon is loaded into the ribbon cassette, the ink ribbon falls down due to the excess volume created within the ribbon cassette.
This ink ribbon collapse causes twisting and folding during running, causing ribbon jams and printing defects.

As a solution to the above-mentioned problem, a device has been devised in which a component having an ink ribbon fall-preventing wall is provided in the ink ribbon storage section, and the component is operated to hold down the ink ribbon each time the ink ribbon is replaced. However, in the above structure, since a special part is provided to prevent the ink ribbon from falling, the cost increases, and there is a risk that failures may occur due to loss of the part. Furthermore, very complicated operations are required each time the ink ribbon is replaced.

[Purpose of invention]

An object of the present invention is to eliminate the above-mentioned drawbacks of the prior art and to provide an ink ribbon sub-cassette with a simple structure.

[Summary of the idea]

In the present invention, a wall is provided at the inner bottom of the ribbon case within the ink ribbon sub-cassette to prevent the ink ribbon from falling, so that when the ink ribbon is replaced, the entire ink ribbon sub-cassette is replaced.

[Example of idea]

The present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of an ink ribbon sub-cassette showing an embodiment of the present invention, and FIG. 2 is a plan view of the ink ribbon sub-cassette of the present invention installed in the ribbon cassette.

In FIG. 1, the ink ribbon sub-cassette is composed of an upper cover 30, a ribbon case 10, and an inner sole 20, and one side wall of the inner sole 20 is formed into a V-shape 22 with a slit 21 in the center.
Therefore, the ink ribbon 50 can pass through the slit 21 to the ribbon brake 60 without causing the ink ribbon to fall due to the V-shaped side wall.

Further, the entire ink ribbon sub-cassette is arranged on the ribbon feed roller 70 side, and the ink ribbon 50
As the volume of the ink ribbon increases, only the inner bottom moves toward the ribbon brake 60, so that the ink ribbon does not fall. The outer surface of the ribbon case 10, which comes into contact with the inner surface of the ribbon cassette 40, is processed so that it is not affected by the movement of the inner sole, for example, it is made of a material with a high coefficient of friction.

Furthermore, as shown in FIG. 2, since the ribbon feed roller 70 side of the ribbon case 10 is in the open state, the ribbon sub-cassette is moved to the ribbon feed roller 70 side.
Place it on the side, remove the top cover 30, and remove the ink ribbon 50.
Simply pass it through the slit 21 of the inner sole 20 and attach it to a ribbon brake or the like. Therefore, when replacing the ink ribbon, it becomes easy to take out the entire old ribbon cassette from the ribbon cassette 40 and mount a new ribbon sub-cassette.

[Effect of idea]

According to the present invention, it is possible to prevent the ink ribbon from falling down with a simple structure, and there will be no loss of parts or operational errors when replacing the ink ribbon.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an ink ribbon sub-cassette showing an embodiment of the present invention, and FIG. 2 is a plan view of the ink ribbon sub-cassette of the present invention installed in the ribbon cassette. In the figure, 10 is a ribbon case, 20 is a midsole, 21 is a slit, 22 is a V-shaped side wall of the midsole,
30 is an upper lid, 40 is a ribbon cassette, 50 is an ink ribbon, 60 is a ribbon brake, and 70 is a ribbon feed roller.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A ribbon sub-cassette for storing an endless ink ribbon, which stores the endless ink ribbon in a folded state and is open in the longitudinal direction; an ink having a V-shaped side wall that prevents the ink from falling, an opposing surface of the side wall being open, and a middle bottom that is movable within the case as the volume of the folded endless ink ribbon increases. Ribbon subcassette. 2. The ribbon cassette according to claim 1, wherein the sum of the lengths of the ribbon case and the inner sole is longer than the length of the ribbon cassette.