JPS5836480A - Cassette type ink ribbon for printer - Google Patents

Abstract

PURPOSE:To tension an ink ribbon properly regardless errors in the setting interval of both cassette cases by applying a tension to the ribbon with a tension application member so arranged to slide freely in one cassette case. CONSTITUTION:A tension application member 7 is so arranged to slide freely in one of two cassette cases 1 and an ink ribbon 20 is tensioned with the tension application member 7 driven by a spring 12. As long as the tension application member 7 is within the free sliding range thereof, the ink ribbon 20 won't tension or slacken too excessively even when any error occurs in the setting interval of both the cassette cases 1 and 1.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cassette-type ink ribbon for a printing device.

For example, a type in which an endless ink ribbon is stretched across two cassette cases is disclosed in Utility Model Application No. 11455-
It is disclosed in Japanese Patent No. 107210.

In this known device, a storage chamber is formed in one cassette case to store the ink ribbon in a meandering manner, and the ink ribbon is fed into this storage chamber by a drive roller while being pulled out from this storage chamber. Therefore, even when the ink ribbon is set in the printing device, it still exists in the storage chamber. This is because an extremely long ink ribbon is required in view of the ink life of the ink ribbon.

However, this had the disadvantage that the entire cassette became larger due to the existence of the storage chamber.

In the present invention, the length of the endless ink ribbon is determined corresponding to the reset interval between two cassette cases, and
Therefore, even if the cassette case is made smaller and the setting intervals of the two-way set case are set with relatively rough precision, the ink ribbon may become excessively tense or, conversely, may become slack. The aim is to make the most of it.

The implementation of the cassette type ink ribbon according to the present invention will be described below.

As shown in FIG. 1 and FIG. 2, the cassette-type ink ribbon of this embodiment includes two cassette cases 1, 1, and each cassette case 1 has two cassette cases 1 and 1.

It is composed of a lower case 2 and an earthen case 3, which were formed from the Gusistek of ABS Temple. Lower case 2mm 4 places rc
A connecting hole &14 is provided, and the upper case 5 has a protrusion (not shown) formed protrudingly at a position corresponding to this hole.
is press-fitted into the hole 4 and secured to the lower case 2 by cauterization. An ink roller 5 and a transfer row 26 in contact with the ink roller are provided inside the left cassette case 1.

The ink roller 5 is made of nitrile butadiene rubber (NBR).
The ink is forcibly impregnated into the ink. As the material of the ink clone 5, other types of sponge-like porous rubber, felt, etc. may be used. A tension applying member 7 is provided inside the shafted cassette case 1.

The tension applying member 7 includes a cove-shaped cavity 8 with a curved right end, and a semi-cylindrical part 9 formed at the rear of the cavity 8.

This cow cylindrical sky? 1als90 A protruding collar part 1 on both I11. ．． It consists of 0.10. A coil sedge ring 12 is arranged between the cylindrical shape @9 and the wall surface 11 of the case. In this series, the left and right cassette cases 1 and 1 are all made by Gensho Enozo,
On the bottom surface of the lower case 2, a kite @15 for supporting the tension applying member 7 so as to be slidable left and right is formed at a depth that is almost the same as the opposite bank of the collar portion 10. In addition, 1 case 2 K
A bearing 15 rotatably receives the shaft 14 of the ink cloak.
and a hook-shaped bearing 17 that receives the shaft 16 of the transfer roller 6.
and is provided. The bearing 17 has a width corresponding to the diameter of the shaft 16, so that the transfer roller 5 is rotatable and also movable left and right. The inner shape of the upper case 6 is exactly the same as the rt+IO shape of the lower case 2. Furthermore, each of the left and right cassette cases 1.1 has narrow slit-shaped openings 1 at the top and bottom positions in the same curved parts.
8 is formed, and a connecting claw 19, 19 that can be combined with and separated from the double-force set case 1+1 is also formed in the central part. Double power set case 1.1 has connecting claw + 9
．． At step 19, they are assembled into a connected body, and are displayed in this state. A portion of a considerable length of the endless ink phone 20 is folded in a meandering manner and packed inside the hollow part 8 of the guide body 7, and is divided into both sides from the tip of the guide body 7. The transfer roller 26 is passed through each opening 18 and hooked onto the outer peripheral surface of the transfer row 26 . In the state shown in FIG. 1, the tension applying member 7 is pushed to the right by the coil spring 12, and therefore the ink ribbon is pushed between the tip of the tension applying member 7 and the inner surface of the lower case 2. The ink ribbon 20 is clamped by the force of the coil ring 12, and the ink ribbon 20 will not come out naturally from the cavity 8 even with a slight external impact, and there will be no inconvenience such as the ink ribbon 20 becoming tangled within the cassette cases 1, 1. Does not occur. In addition, the fi on both sides of the outer surface of the lower case 2 is formed by integrally protruding a fulcrum part 21 in the central part, and a plate-shaped spring part 22 is lowered around this fulcrum part 21 as shown in FIG. It is integrally formed to hang down along the outer wall surface of the case 2.

The lower end of the plate-shaped spring portion 22 projects further downward than the downward direction of the lower case 2, and an engagement interface and a claw 25 are provided at this lower end.

When this cassette-type ink ribbon is loaded into a printing device such as a serial printer, the following procedure is used. 1. In Figure 1, the left and right cassette cases 1.
Hold 1 in your hand and move them up and down each other. Then, the connecting claw 19
．． 19 is released, and the double-sided cent cases 1, 1 become separable.

When the double-force setting case 1.1 is opened to the left and right with a hand, the ink ribbon packed in the cavity 8 is inserted between the tip of the tension applying member 7 by the coil spool ring 12 and the inward direction of the lower case 2. The ink ribbon 20 is finally pulled out against the frictional force of the hollow part \8, and the third
As shown in the figure, the tension applying member 7 is guided by the guide @ 13 against the coil tension member 12 and moves slightly to the right inside the case. At this time, the distance of the double force cent case 1.1 is
The mounting length of the cassette cases 1, 1 of the printing device is set in advance. The printing device is provided with a line of mounting plates 24 as shown in Figure M4. When the cassette case 1.1 is pushed down toward this mounting plate 24, the IF claw 25 engages the mounting plate 24.
11! Each cassette case 1.1 is held on the mounting plate 24 by a panel of the plate-shaped spring portion 22.

In the installation state shown in the first diagram, 1-car cassette case 1, 1
One of the two strips of ink ribbon 20 that is pulled out from the opening 18 and exposed is inserted into a print head and a 7" fan (both not shown). At this time, the ink ribbon 20 is inserted into the nook of the coil spring 12. Appropriate tension is applied via the tension applying member 7, and the transfer roller 26 is in elastic contact with the ink roller 5 due to the tension. When printing is performed with the scanning of the print head, the ink ribbon 2
0 is sent through a suitable ink ribbon feed mechanism 9 in conjunction with the scanning of the print head, particularly in conjunction with the carriage return operation of the print head, and the transfer row 76 and ink row j5 also rotate. The ink impregnated in the ink roller 5 is thinly attached to the outer peripheral surface of the transfer roller 26, and therefore, when the ink ribbon 20 rotates as described above, the transfer roller 6 is attached to the ink ribbon 20. The ink adhering to the surface of is replenished by Shintomo.

When removing the cassette case 1 from the 41st percent I installation state, by holding the upper ends of both plate-shaped spring parts 22, 22 with your hands and bringing them inward, the lower ends of the plate-shaped spring parts 22, 22 will be removed. The cassette case 1 is expanded outwardly around the fulcrum part 21, and the locking pawl 23 is disengaged from the end of the mounting plate 24, and the cassette case 1 can be easily removed by simply lifting it upward.

The above-mentioned cassette-type ink ribbon according to the present invention is designed to apply tension to the ink ribbon by using a tension-applying member that is slidably disposed on one of the two cassette cases and is resiliently sprung by a spring. Even if there is an error in the set spacing between two cassette cases, as long as it is within the range in which the tension applying member can slide automatically ((appropriate tension is applied to the ink ribbon. In other words, the cent spacing is The length of the ink ribbon can be shortened to the minimum limit due to the fact that the ink roller and transfer roller have one ink roller to replenish ink to the ink ribbon. For one thing, the conventional ribbon storage chamber becomes uncomfortable, and the entire cassette can be constructed in one piece.

4. The simple inter-station drawings on page 1 relate to the cassette-type ink ribbon according to the present invention, in which Fig. 1 is a cross-sectional view in a connected state, Fig. 2 is a longitudinal sectional view of the same, and Fig. 3 is a view of the ink ribbon set in the printing device. Fig. 4 is a cross-sectional view of the state shown in Fig. 3.
...Transfer roller 7...Tension applying member 12...
- Suzu ring 13... Guide groove 20... Ink ribbon and above Applicant Seikokai Co., Ltd. Agent Patent attorney Mogami Figure 1 Figure 2

Claims (1)

[Claims] An endless ink phone is stretched across two separate cassette cases installed at a distance in a double-sided device, and an ink roller and a transfer roller are rotated in one of the double-sided set cases. A tension applying member that applies tension to the ink ribbon is inserted into the other side of the double force setting case and is freely supported. A cassette-type ink ribbon for a printing device, characterized in that the tension applying member is slidable in the direction in which the ink ribbon is tensioned, and is pushed by a tin ring.