JPS6244484A - Apparatus for supplying printer ink ribbon - Google Patents

Abstract

PURPOSE:To attain cost reduction by effectively utilizing even the right side of an ink ribbon, by a method wherein the ink ribbon is wound around a guide roller in an inclined state to be turned back and the taking-up and unwinding of the ink ribbon is performed by supply reels forming a pair and the ink ribbon before and after turning-back is arranged between a character drum and a printing hammer. CONSTITUTION:An ink ribbon 12 passes the vicinity of the outer peripheral backside of a character drum 10 from one supply reel 19a and passes the outer peripheral backside of a lower guide roller 15 to be wound around an upper guide roller 14 in an inclined state and is turned back in inclination to the reverse direction and passes the vicinity of the outer peripheral backside of the character drum 10 through the outer peripheral backside of the lower guide roller 15 to reach the other supply reel 19b. The ink ribbon 12 is set so that the upper and lower runs of the ink ribbon 12 before and after turning-back are superposed in an area high in printing frequency in the lateral direction at the printing position where a printing hammer is opposed to the character drum 10. The printing hammer 11 is arranged in opposed relation to the outer peripheral back surface side of the character drum 10 and printing paper 13 is passed between the ink ribbon 12 and the printing hammer 11 along the vertical direction.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a printer ink ribbon supply device.

[Technical background of the invention and its problems]

Conventionally, an ink ribbon supply device for a printer that prints using a drum whose surface is engraved with characters or symbols (hereinafter referred to as a character drum) has an ink ribbon 1 placed on a sheet of paper 2 as shown in FIGS. 10 and 11. A pair of supply reels 4 are positioned above and below the character drum 3 in the vicinity of the character drum 3 at the printing position.
, 4', the winding and unwinding are performed and the winding moves up and down, and when all the winding is completed on one supply reel, winding begins on the other supply reel, and the movement is repeated.

In general, when we investigated the distribution of usage frequency in the width direction of the ink ribbon 1, we found that it was higher on the left side, and the wear of the ink ribbon 1 was more severe the closer it was to the left side.As it was being used, it was hit by the printing hammer 5 and stretched faster on the left side. In the case of the conventional ink ribbon supply device mentioned above.

The ink ribbon 1 has a problem in that it stretches to one side as it is used, and in severe cases wrinkles occur, resulting in an extremely poor print quality, even when the right half of the ink ribbon 1 is hardly used.

When the left side is severely worn out, the ink ribbon 1 must be replaced with a new one, which is wasteful and inefficient, and the width of the ink ribbon 1 must be equal to the width of the paper 2, which increases the cost. The problem was that it was high.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned conventional drawbacks, and its purpose is to reduce costs by effectively utilizing the right side of the ink ribbon, and to prevent the ink ribbon from stretching to one side during use. To provide a printer ink ribbon supply device that does not cause wrinkles.

[Summary of the invention]

In order to achieve the above-mentioned object, the present invention has an ink ribbon tilted to a guide roller, and the winding is folded back.

Winding and unwinding are performed by a pair of supply reels, and the ink ribbon before and after the folding is placed between the character drum and the printing hammer, so that the width of the ink ribbon is small and the right side can be used effectively. It saves costs and does not stretch out during use.

This is a printer ink ribbon supply device that does not cause wrinkles.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 to 7. 1 and 2 are schematic configuration diagrams showing the main parts of the printer, and FIG. 3 is a perspective view showing the external appearance of the printer. Main parts such as an ink ribbon supply section and a character drum are housed in a storage case 7 protruding from approximately the center of the front surface of the casing 6 of the printer 1, and a lid 8 at the top of the casing 6 can be opened and closed. As shown in FIG. 4, the storage case 7 is supported in a cantilevered manner by a vertical shaft 9 provided on the housing 6, and is rotatable in an angular range of 90 degrees or more along the horizontal direction.

Printing by the printer 1 is performed as follows. When a desired character on the character drum 10 rotating at high speed comes to the position of the printing hammer 11, the printing hammer 11 removes the ink ribbon 12 and printing paper 13 between the printing hammer 11 and the character drum 10. The character drum 1 through
0, and the character on the character drum 10 is transferred onto the printing paper 13 using ink from the ink ribbon 12, thereby printing.

As shown in FIG. 5, the character drum 10 has all alpha bent characters and symbols engraved on its outer peripheral surface, and the same characters and symbols are arranged along the generatrix direction for the required number of digits.

Upper guide roller 14 and lower guide roller 15
In each case, the character drum 10 is placed above the character drum 10.
is placed parallel to. The upper guide roller 14 is for winding and folding the ink ribbon 12, and the lower guide roller 15 is for guiding the ink ribbon 12 between the printing hammer 11 and the outer peripheral back side of the character drum 10. It is something. FIG. 6 is a perspective view showing the support portion of the upper guide roller 14. The upper guide roller 14 is rotatably fitted onto a shaft core 16, and the shaft core 16 has a vertical shaft hole at its end. A vertical shaft 17 is inserted into the shaft hole, and the vertical shaft 17 is supported by upper and lower brackets 18 provided on the side plate 7a of the storage case 7, so that the guide roller 14 is supported in a nine-cantilever manner. The other end (not shown) of the shaft core 16 is detachably fixed to the other side plate of the storage case 7, and is rotated 90 degrees along a horizontal plane with the vertical shaft 17 as the center.
It can be rotated freely over an angular range of more than 100 degrees.

The ink ribbon supply reels 19a and 19b are located below the character drum 10 and are arranged on the left and right sides, and are inclined at the same angle in different directions along the same plane with respect to the character drum 10 and the guide rollers 14 and 15. 12
The ends of the ink ribbon 12 are wound around each other, and the ink ribbon 12 is wound up. When one supply reel winds up, the other supply reel rewinds, and the ink ribbon 12 reciprocates between the resupply reels 19a and 19b.

FIG. 7 is a partially enlarged front view showing the drive section of the supply reels 19a and 19b. Supply reel 19a.

19b, the reel shaft 20 is supported by a bearing portion 21.

A bevel gear 22 is fixed to the end of the reel shaft 20.

The drive motor 23 provided near the bottom of the supply reels 19a, 19b has a drive gear 24 at the end of the shaft, and a relay gear 25 is provided between the bevel gear 22 and the drive gear 24 of the reel shaft 20. be. The supply reels 19a, 19b are rotationally driven by a drive motor 23 via these gears.

As shown in FIGS. 1 and 2, the ink ribbon 12 is fed from one supply reel 19a, passes near the outer periphery back side of the character drum 10, passes through the outer periphery back side of the lower guide roller 15, and winds it around the upper guide roller 14 at an angle. It is hung, tilted in the opposite direction and folded back.

The character drum 1 passes through the outer circumferential back side of the lower guide roller 15.
0 and reaches the other supply rule 19b. At the printing position facing the printing hammer 11 and the character drum 10, the ink ribbon 12 is arranged so that the front and back folds overlap in the width direction where printing is frequently performed.

The printing hammer 11 is disposed facing the outer peripheral back side of the character drum 10, and the printing paper 13 is passed vertically between the ink ribbon 12 and the printing hammer 11.

FIG. 8 is a perspective view for explaining the procedure of how to send the printing paper 13 to the printer 1. Open the upper lid 8 upward as shown in (a), open the storage case 7 by pulling it toward the front as shown in (b), and open the printing paper 13 from the bottom to the top as shown in (c). Then, as shown in (d), close the storage case 7 and lid 8 to complete the process.

FIG. 9 is a perspective view for explaining the procedure for feeding the ink ribbon 12 into the printer 1.

(a) Open the storage case 7, (b) Rotate the upper guide roller 14 by 90 degrees or more, (C) Set one supply reel 19b in a predetermined position, and then set the other supply reel 1.
9a to the top of the storage case and ink ribbon 12
(d) Close and set the upper guide roller 14. (e) Lower the other supply reel 19a below both guide rollers 14.15 to move the ink ribbon 12 across the upper guide roller 15. The winding is turned back around the guide roller 14, (f) the other supply reel 19a is set in a predetermined position, (g) the slack in the ink ribbon 12 is eliminated, and (h) the storage case 7 is closed to complete the process. Removal of the ink ribbon 12 can be performed in the reverse order of the above procedure.

According to this embodiment, the ink ribbon supply section and the character drum 10 are housed in the storage case 7, and the storage case 7 is rotatable in the horizontal direction within an angular range of 90 degrees or more. Upper guide roller 1 stored inside
4 is 9 with the vertical shaft 17 provided at the end of the shaft core 16 as the center.
Since it is rotatable within an angle range of 0 degrees or more, the ink ribbon 1
2 is extremely easy and convenient to set and remove, and since the ink ribbon 12 is arranged so that the ink ribbons before and after folding overlap in the width direction where printing is frequently performed, the bias in the distribution of frequency of use in the width direction is alleviated. This reduces the occurrence of one-sided pressing and wrinkles.

〔Effect of the invention〕

According to the present invention, an ink ribbon is wound around a guide roller and folded back, and both ends of the ink ribbon are wound and unwound by a pair of supply reels, and both the ink ribbon before folding and after folding are connected to a character drum for printing. Since the ink ribbon is placed between the ink ribbon and the hammer, the frequency of use of the ink ribbon is not excessively biased to the left side, and the entire surface along one width direction can be used effectively.

The occurrence of one-sided printing and wrinkles is reduced, and there is no deterioration in print quality.
Since the width of the ink ribbon can be reduced, it is possible to provide a more economical printer ink ribbon supply device.

[Brief explanation of the drawing]

FIG. 1 is a diagonal front view showing a schematic configuration of main parts of a printer according to an embodiment of the present invention. Figure 2 is a side view of the same as above. FIG. 3 is a perspective view showing the external appearance of the printer. FIG. 4 is a perspective view showing the storage case portion. FIG. 5 is a perspective view of the character drum. FIG. 6 is a perspective view showing the support portion of the upper guide roller. FIG. 7 is a partially enlarged front view showing the ink ribbon supply reel drive section. FIG. 8 is a perspective view showing the procedure for loading printing paper into the printer. FIG. 9 is a perspective view showing a procedure for setting an ink ribbon in a printer. FIG. 10 and FIG. 11 are a perspective view and a side view, respectively, showing a conventional example. 1...Printer. 6...Housing. 7...Storage case. 8... Lid. 9... Vertical axis. 10...Character drum. 11...Printing hammer. 12... Ink ribbon. 13...Printing paper. 14.15...Guide roller. 16... Axis core. 17... Vertical axis. 18...Bracket. 19a, 19b...-supply reel. 20...Reel axis. 21...Bearing section. 22...Bevel gear. 23... Drive motor. 24.25...Gear. Patent Applicant Casio Computer Co., Ltd. (Main figure) (Inkstone figure 1) Figure 7 (Correct &: J figure small figure 8 (I palm Σ to shoulder shoulder figure)

Claims (1)

[Claims] In a printer having a character drum and a printing hammer provided opposite to the outer periphery of the character drum, the ink ribbon is wound in pairs with a guide roller on which the ink ribbon is wound and folded at an angle. 1. A printer ink ribbon supply device comprising a supply reel for rewinding the ink ribbon, the ink ribbon before and after being folded being arranged between the character drum and the printing hammer.