JPH0414214Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an ink ribbon pancake used in typewriters and word processors. More specifically, when the ink ribbon is assembled into a cassette case and used, a groove is formed at the end of the core for incorporating a spring or the like which is a part of the cassette, and the groove-formed portion is made to protrude to the outside so that the ink ribbon can be inserted into the core. This invention relates to ink ribbon pancakes (hereinafter referred to as pancakes) formed by winding them up into ink ribbon pancakes.

[Prior Art] Conventionally, a core shown in FIG. 4 has been used for manufacturing pancakes. As shown in the figure, this core 1 has a groove 2 formed in the outer periphery of one end of the cylindrical core 1 into which a spring or the like can be inserted.

To manufacture pancakes using such cores 1, as shown in FIG. 5, a large number of cores 1 are fitted onto the winding shaft 6 of a slitter, and an ink ribbon is wound around the outer peripheral surface of the cores 1. This is done by
Note that 7 is a spacer for regulating the distance between the cores 1.

[Problems to be solved by the invention] However, when using the conventional core 1,
Since the ends of the cores 1 on which the grooves 2 are formed must be aligned so that they face in the same direction on the winding shaft 6 for all cores 1, there is a drawback that the work is cumbersome and productivity is poor. If you attach the core 1 in the wrong direction, you have to pull out the attached core 1, correct the attachment direction, and then attach it again, which is extremely troublesome and reduces productivity. It was the cause of this.

For this reason, it is conceivable to use a core in which grooves are formed symmetrically on the outer periphery of both ends, as described in Japanese Utility Model Application Publication No. 60-88764. However, as is clear from the fact that the groove described in the above-mentioned publication actively drops the ink ribbon into the groove to prevent the ink ribbon from shifting, it is clear that the ink ribbon connected with the conventional leader tape cannot be used. If the ink ribbon is wound over one of the grooves, there is a problem in that the ink ribbon falls into the groove and winds irregularly.

In view of the above circumstances, it is an object of the present invention to provide a pancake that can improve productivity without causing disordered winding of the ink ribbon.

[Means for Solving the Problems] In the ink ribbon pancake of the present invention, a groove is formed on the outer periphery of the end of a cylindrical core, and the groove formed portion at one end is made to protrude outside so that the ink ribbon can The ink ribbon pancake is wound around a core, and the core is provided with grooves on the outer periphery of both ends thereof, and the grooves are formed symmetrically, and the ink ribbon is wound around the core. A leader tape having enough stiffness not to bend and fall into the groove is connected to the front edge in the winding direction, and the leader tape covers either of the grooves and is wound around the core. A structure in which the material is rolled up is adopted.

[Operation and Effects of the Invention] In the present invention, the directionality of the core is eliminated by forming grooves on both ends of the core, which simplifies the work of fitting the core onto the winding shaft during production and improves productivity. can be improved. Further, regarding winding of the ink ribbon, since one of the grooves is covered with a strong leader tape, the ink ribbon does not fall into the groove, and good winding without disorder is possible.

The design concept of this invention is based on the following conventional technical common knowledge. In other words, if grooves are formed on the outer periphery of both ends of the core to make the core symmetrical, the ink ribbon will inevitably overlap one of the grooves, and the ink ribbon will fall into this groove, causing irregular winding. Become. Therefore, it is believed that grooves can only be formed on one side.

However, the present invention solves the problem caused by the drop of the ink ribbon by skillfully utilizing the stiffness of the leader tape, making it possible to adopt the above-mentioned configuration that overturns conventional technical common sense, thereby increasing productivity. I was able to improve it.

[Example] Next, embodiments of the present invention will be described.

Fig. 1 is a perspective view of a core according to an embodiment of the present invention, Fig. 2 is a vertical sectional view showing a pancake of the same embodiment, and Fig. 3 is a core according to the embodiment fitted into a winding shaft. FIG.

In FIG. 1, a core 1 is formed into a cylindrical shape, and annular grooves 2 and 3 are formed on the outer periphery of both left and right ends, respectively, in which springs and the like, which are parts of the cassette, are formed. The distances L ₁ and L ₂ between the inner end of one of the annular grooves and the other end surface of the core have the same length as the width of the ink ribbon 4 .

In FIG. 2, reference numeral 5 denotes a leader tape connected to the front edge of the ink ribbon 4 in the winding direction, and is made of, for example, a 25 μm thick polyester film having the same width as the ribbon 4. used. Note that the material and thickness of the leader tape 5 are not limited to those mentioned above, but any material such as a synthetic resin film such as polyethylene or polyamide, paper, etc., which is stiff enough not to fall into the groove, is suitable. Can be used.

The shape of the grooves 2 and 3 is not limited to the annular shape shown in the figure, but may also be a groove shape in which a part of the outer periphery of the core 1 is cut out. It is sufficient that a groove for connecting to another object (not limited to a spring) is formed in the core, and that the entire core including the groove is left-right symmetrical.

The ink ribbon 4 is a thin high-density paper or resin film coated with heat-sensitive transfer ink or pressure-sensitive transfer ink on one side.

The pancake of the present invention, as shown in Figure 3,
It is manufactured by inserting a large number of cores 1 into a winding shaft 6 of a slitter with spacers 7 interposed therebetween, and rotating the winding shaft 6. At this time, as shown in FIG. 2, the leader tape 5 is wound so as to cover either the groove 2 or the groove 3, and the ink ribbon 4 is further wound up on top of the leader tape 5.

With the above configuration, a large number of pancakes can be manufactured at once, and the core 1 can be inserted into the winding shaft 6 regardless of whether it is on the left or right side, which improves work efficiency. This resulted in a significant improvement. Furthermore, since the leader tape 5 covers one of the annular grooves, it does not fall into the annular groove, and as in the case of winding around a core having an annular groove formed only on one side, the leader tape 5 can be wound smoothly without any disturbance. can be made possible.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a core according to an embodiment of the present invention, Fig. 2 is a vertical sectional view showing a pancake of the same embodiment, and Fig. 3 is a core according to the embodiment fitted into a winding shaft. FIG. 4 is a perspective view of the conventional core, and FIG. 5 is a perspective view of the conventional core fitted into the winding shaft. Main symbols in the drawing: 1...Core, 2, 3...Groove,
4... Ink ribbon, 5... Leader tape.

Claims (1)

[Scope of utility model registration request] An ink ribbon pancake in which a groove is formed on the outer periphery of the end of a cylindrical core, and the ink ribbon is wound around the core with the groove formed portion at one end protruding outside, the core comprising: Grooves are provided on the outer periphery of both ends of the ink ribbon, and the grooves are formed symmetrically, and the ink ribbon has a leader tape on its front edge in the winding direction that is stiff enough not to bend into the groove. an ink ribbon pancake in which the ink ribbon is wound on the leader tape, which is connected to the core, and the leader tape is wound around the core so as to cover either one of the grooves.