JPH0333481Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Summary] One of the rollers of the stretched belt (the side away from the feeding section) is tilted at a predetermined angle close to the storage section, and the pressing force received from the stored ink ribbon is reduced. The strength is increased as the distance from the ribbon feeding section increases.

[Industrial application field]

The present invention relates to an improvement in an endless ink ribbon cartridge that utilizes the stretched length of the belt to reliably feed the ink ribbon and to supply the ink ribbon to a printing section.

[Conventional technology]

FIG. 1 is a plan view showing an example of an ink ribbon cartridge applied to a wire dot printer, FIG. 2 is a plan view showing an ink ribbon cartridge, and FIG.
The figure is a plan view showing the operation of the main parts of the ink ribbon cartridge.

In this printer, as shown in a plan view in FIG. 1, a printing paper 2 is wound around a platen 1, and is rotated in the axial direction of the platen 1 by forward and reverse rotation of a feed screw gear 5 via a belt 20 by a space motor 4. The carrier 3 is controlled to move from side to side along the line.

The print head 6 is mounted on a carrier 3, and an ink ribbon cartridge 7 is mounted on the carrier 3, and an ink ribbon 8 is supplied between the print head 6 and the printing paper 2.

The printing head 6 has a built-in plurality of printing wires, which are moved in and out of the platen direction by a drive means based on a magnet (not shown), and impact the printing paper 2 via the ink ribbon 8.

At this time, the feed roller in the cartridge 7 is rotated by a ribbon feed mechanism provided in the carrier 3 and the like.

Then, the belt stretched over the feed roller moves and transports the ink ribbon 8, and the ink on the ink ribbon 8 is transferred to the printing paper 2, and a pattern such as a character is formed by the combination of dots on the print head 6. Ru.

The ink ribbon cartridge 7 is made up of a case 9 and an endless ink ribbon 8, as shown in a plan view in FIG. It is folded and stored.

A loading section for loading the ink ribbon 8 into the storage section 17 is disposed in the loading path 18, and includes rollers 11 and 12 facing each other with a predetermined interval, and rollers 11 and 12.
It consists of an endless belt 13 stretched between them, and a pressure roller 14 that presses the ink ribbon 8 against one roller 11 via the belt 13.

As shown in the figure, the surface 13a of the belt 13 on the ribbon storage section 17 side stretched in tension is parallel to the folding surface of the ink ribbon 8 folded and stored in the storage section 17.

By configuring in this way, the belt 13
A pressing force (preload) applied to the ink ribbon 8 of the part being fed in from the part of the ink ribbon 8 that has already been stored acts on the ink ribbon 8, so that it is folded into a zigzag shape with a bending width along the belt 13.

Due to this feeding, the ink ribbon 8 is moved by the friction spring 1 provided in the feeding section 19.
It is pulled out while being prevented from loosening at step 6, and is supplied to the printing section.

[Problem that the invention attempts to solve]

In such an ink ribbon cartridge, conventionally, as shown in the plan view of FIG. That is, the pressing force was uniform as shown by the preload distribution shown by the arrow.

However, in such a method, the coefficient of friction between the ink ribbon 8 and the belt 13 changes due to changes in the viscosity of the ink due to changes in the usage environment temperature, changes in the hardness of the belt 13, etc. In some cases, the belt was not drawn in close to the belt roller 12 on the storage section 17 side.

For this reason, the folded shape of the ink ribbon in the storage section 17 has an irregular folding width, resulting in a messy storage, resulting in a problem that the ink ribbon 8 cannot be reliably fed.

[Means for solving problems]

FIG. 4 is a plan view showing the operation of the main parts of an embodiment of the ink ribbon cartridge of the present invention.

In the present invention, the surface of the belt 13 on the ribbon storage section 17 side is inclined at a predetermined angle so that the belt roller 12 side is close to the storage section 17.

[Effect]

Because the belt roller side of the belt is inclined at a predetermined angle close to the storage section, the pressing force that the belt receives from the stored ink ribbon becomes stronger as it approaches the belt roller, and the frictional force increases and the ink Ribbon retraction is ensured.

For this reason, a zigzag fold with a uniform folding width can be realized.

〔Example〕

FIG. 4 is an embodiment of the present invention, and is a plan view showing the operation of the main parts of an embodiment of the ink ribbon cartridge.

Identical parts are designated by the same reference numerals throughout the figures.

The present invention solves the above problems by changing the mounting angle of the belt in order to optimize the preload distribution on the belt 13.

By doing so, it is possible to provide an ink ribbon cartridge that can reliably feed the ink ribbon 8.

For this purpose, in the present invention, the rollers 11 and 12, which are arranged in the feeding path 18 and are opposed to each other with a predetermined interval, and the roller 1, which are explained in FIG.
An endless belt 13 stretched between 1 and 12;
The surface 13a of the belt 13 on the ribbon storage section 17 side of the ribbon feeding section, which is composed of one roller 11 and a pressure roller 14 that presses the ink ribbon 8 through the belt 13, is connected to the ribbon storage section 17 as shown in FIG. The belt roller 12 side is brought close to and inclined at a predetermined angle.

By doing this, the ink ribbon 8 fed into the storage section 17 is bent and stored in the storage section 17 as shown by the arrow A in FIG. 1
2, the adhesion force to the belt 13 increases, preventing loss of feeding stability due to a decrease in the friction coefficient between the conventional ink ribbon 8 and the belt 13, and improving the temperature margin of the cartridge 7. It becomes possible to improve the

Therefore, the ink ribbon 8 is reliably fed in by the belt 13, pulled out from the feeding section 19 on the opposite side, and supplied to the printing section.

The mounting position of the belt roller as described above can be arranged by simply raising the mold during the molding operation of the cartridge case, and does not increase the number of assembly steps.

[Effects of the invention] As explained above with reference to the embodiments, in the ink ribbon cartridge according to the invention, the folding width of the ink ribbon can be reduced simply by slanting the belt that feeds the ink ribbon. Since it becomes uniform, the filling can be performed stably and reliably, which improves the reliability of the device. In addition, the permissible environmental temperature range is expanded, which improves operability.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an example of an ink ribbon cartridge applied to a wire dot printer, FIG. 2 is a plan view showing a conventional ink ribbon cartridge, and FIG. 3 is a plan view of main parts of the ink ribbon cartridge. FIG. 4 is a plan view of essential parts of an embodiment of the ink ribbon cartridge of the present invention. In the figure, 1 is the platen, 2 is the printing paper, and 3 is the platen.
is a carrier, 6 is a print head, 7 is an ink ribbon cartridge, 8 is an ink ribbon, 9 is a cartridge case, 11 is a feed roller, 12 is a belt roller, 13 is a belt, 14 is a pressure roller, 15 is a press A shear spring, 16 is a friction spring, 17 is a storage section, 18 is a feeding path, 19 is a feeding port, and 20 is a feeding section.

Claims (1)

[Claims for Utility Model Registration] Endless ink ribbon 8 exposed at a predetermined position
rollers 11 and 12 that are disposed in a feeding path 18 that feeds the exposed ink ribbon 8 into the storage section 17 and opposed to each other with a predetermined interval therebetween;
an endless belt 13 stretched between them; and a pressure roller 1 that presses the ink ribbon 8 against the one roller 11 via the belt 13.
4 constitutes a ribbon retracting section 20, and the ink ribbon 8 to be retracted is conveyed to the belt 1.
3, the ink ribbon cartridge is configured to be folded with a folding width along 3, and the surface of the belt 13 on the ribbon storage section 17 side is connected to the ribbon storage section 2 with respect to the storage section 17.
An ink ribbon cartridge characterized in that a roller 12 side at a position away from zero is close to each other and inclined at a predetermined angle.