JPH0858202A - Manufacturing method of core and ribbon core - Google Patents

Abstract

(57) [Summary] [Purpose] The dimensional accuracy is high and paper dust is not attached to the ribbon.
(EN) Provided is a manufacturing method capable of inexpensively manufacturing a core that can handle a wide variety of ribbon widths. [Structure] A substantially hollow cylindrical shape is provided, and an inner peripheral surface thereof is provided with concavities and convexities to be fitted with a shaft member or a drive shaft provided in a main body of the printing apparatus so as to have a uniform radial cross-sectional shape. A manufacturing method of a core for holding a ribbon wound around the outer peripheral surface. The radial cross section has the same cross-sectional shape as the radial direction, and after forming a long core in the axial direction by extrusion molding, the long core has the same cross-sectional shape by cutting into a required length. It is characterized by manufacturing a core.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a method of manufacturing cores and ribbon cores. More specifically, a core manufacturing method capable of inexpensively and highly accurately manufacturing a core that is fitted to a shaft member or a drive shaft and driven to rotate, and a ribbon core formed by winding a ribbon around the outer circumference of the core are inexpensive. The present invention relates to a ribbon core manufacturing method that can be manufactured with high accuracy.

[0002] In the present specification, the ribbon is a broad concept indicating a ribbon which can be wound and held on a cylindrical core. Therefore, in addition to pressure-sensitive and heat-sensitive ink ribbons used in printing devices, correction tapes, adhesive tapes, marker tapes (marker pens that are used as transfer tapes) formed by applying a substance to be transferred onto a band-shaped plastic film in a film shape. Type)), tape printer receptors and tape and laminated ink ribbon with the receptor.

[0003]

2. Description of the Related Art Generally, as shown in FIG. 5, a core 41 for winding and winding and holding a ribbon is a hollow body having a substantially cylindrical shape, and a shaft member 42 is provided on the inner diameter side of the end of the hollow body. And a drive shaft provided in the printer main body is inserted. Then, for example, the rotation stopping claw 43 is provided on the outer peripheral surface of the shaft member 42.
Is provided, and the notch 44 that can be fitted into the rotation stopping claw 43 has an end surface 4 on the side where the shaft member 42 of the core 41 is inserted.
5 (see Japanese Utility Model Laid-Open No. 4-67065). Here, the shaft member is rotatably supported by a support member so that the core is interposed between the drive shaft and the core when the core is not directly inserted into the drive shaft or the ribbon is unwound from the core. And is usually fitted on both ends of the core.

The notch 44 has a function of fitting the core 41 to a drive shaft provided in the printer main body, and a ribbon for winding a ribbon cut into a predetermined width dimension in the manufacturing process on the outer periphery thereof. It also has a role of fitting to the winding shaft of a winding machine (spooling machine), and prevents each core from idling. Further, the notch is also provided as a rotation stopper after the shaft member to be inserted into both ends of the core is inserted.

Such a core is generally made of paper in terms of price, and the manufacturing method is a process of manufacturing a hollow cylindrical paper tube having a required diameter, and a ribbon using the manufactured paper tube. The process of making a round slice according to the width of the paper, and the process of making notches at one end or both ends of the cut paper tube by machining.

Further, in order to manufacture a ribbon core in which a desired narrow ribbon is wound, it is necessary to cut the wide ribbon into small widths and wind the narrow ribbon around the outer circumference of the narrow core. I was trying. In the present specification,
The core refers to a central member for holding or winding a ribbon, and a ribbon having a ribbon wound around the outer periphery of such a core is called a ribbon core (pancake).

[0007]

The above-mentioned paper tube core has a problem that it is very troublesome and the manufacturing cost is high because the notches have to be manufactured one by one with a machine tool. Further, there is a problem that further cost increase is required to improve the dimensional accuracy of the notch.

Further, in a core made of a paper tube, when the humidity becomes high, the swelling occurs in the length direction and the radial direction to change the dimension and the dimensional accuracy is not good, and the drive shaft of the paper tube and the main body of the printing apparatus. There is a problem in that the cutout portion of the paper tube, which is an engaging portion with, wears out and paper dust is generated and adheres to the ribbon.

Further, the work of winding the ribbon around the core is troublesome especially when winding a narrow ribbon, and there is a problem that winding disorder is likely to occur.

Further, there is a problem that many kinds of cores must be manufactured corresponding to various kinds of ribbon sizes from narrow ones to wide ones.

The present invention has been made in order to solve the above-mentioned conventional problems. A core and a ribbon core which have high dimensional accuracy and do not attach paper powder to the ribbon, and can handle various ribbon widths are provided. An object of the present invention is to provide a manufacturing method of a core and a ribbon core which can be manufactured at low cost.

[0012]

The method for producing the core of the present invention is as follows.
It has a substantially hollow cylindrical shape, and its inner peripheral surface has irregularities to be fitted to the shaft member or the drive shaft provided in the printer main body so that the cross-sectional shape in the radial direction becomes uniform, and the outer peripheral surface thereof has A method for manufacturing a core for holding a ribbon in a wound manner, the method comprising: forming a long core in the axial direction by extrusion molding, with a radial cross section being equal to the radial cross section; It is characterized in that a core having the same cross-sectional shape is manufactured by cutting the core into a required length.

The ribbon core manufacturing method of the present invention is
(A) An irregular shape which has a substantially hollow cylindrical shape and which is fitted to a shaft member or a drive shaft provided in the printer main body is formed on the inner peripheral surface thereof.
A step of extruding and molding a long core having a uniform radial cross-sectional shape; (b) cutting the long core to fit the width of the wide ribbon, and the wide ribbon on the outer periphery of the core. And (c) a step of further cutting the wide ribbon core around which the wide ribbon is wound according to the desired width of the ribbon.

[0014]

The core manufacturing method of the present invention is to manufacture a core having an inner peripheral surface provided with unevenness for fitting with a shaft member or a drive shaft provided in the main body of the printing apparatus. Since the cross section is uniform, it can be manufactured by first manufacturing a long core by extrusion, and then cutting the long core thus manufactured into a required width. Therefore, it is possible to omit the conventionally required process such as forming a notch for fitting the core to the shaft member and the like, and improve the dimensional accuracy.

In the ribbon core manufacturing method of the present invention, since the cross-sectional shape of the core in the radial direction is uniform, a long core (long core) is formed by extrusion molding (step (a)). After that, the long core manufactured in this manner is cut according to the width of the wide ribbon wound around the outer periphery thereof, and then the wide ribbon is wound (step (b)). In this step (b), the ribbon can be wound relatively easily because the width of the ribbon is wide.

Further, the wide ribbon core around which the wide ribbon is wound can be cut as desired to obtain a narrow ribbon core (step (c)). In this step (c), the step of cutting the core and the step of cutting the ribbon are performed at one time, which greatly simplifies the step.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The manufacturing method of the core and ribbon core of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an explanatory view of an embodiment of the core manufacturing method of the present invention, FIG. 2 is an explanatory view of an embodiment of the ribbon core manufacturing method of the present invention, and FIGS. 3 and 4 are usage explanatory views of the core and the ribbon core.

First, the manufacturing method of the core of the present invention will be described with reference to FIG. In FIG. 1, 1 is a long core formed by extrusion molding, and the core 2 can be manufactured by cutting this into a required width. This core 2
Fits on its inner peripheral surface into a groove 4a provided on the outer peripheral surface of the drive shaft 4 as shown in FIG. 3 or a groove 5a provided on the outer peripheral surface of the shaft member 5 as shown in FIG. It has irregularities 3 that can be formed. The drive shaft 4 is provided on the main body of the printing apparatus, and by fitting the drive shaft 4 to the core, the core is driven to wind the ribbon around its outer peripheral surface.

The long core 1 is formed by extrusion molding a thermoplastic resin such as ABS resin, AS resin, polyacetal (POM), vinyl chloride resin, polyethylene (PE), polystyrene (PS), polycarbonate (PC) according to a conventional method. It is obtained by doing. Paper cores and the like have been frequently used as core materials, but in the manufacturing method of the present invention, a machine tool is used to machine a notch for stopping rotation of the core by using ABS resin, AS resin, and POM. There is no need to reduce costs, and there is no risk of dust remaining in the manufacturing process or cutting powder such as paper dust generated by contact with the drive shaft or shaft member during use adhering to the ribbon held on the outer peripheral side. . In addition, ABS resin, AS resin,
Since POM does not swell due to humidity, dimensional accuracy can be improved.

The core 2 is obtained by cutting the above long core 1 into a required width with a cutter. The width of the ribbon wound around the core 2 depends on what is used. But,
According to the manufacturing method of the core of the present invention, unlike the conventional method, a step of forming notches one by one by machining is not required, and moreover, it is a very simple work of just making a circular slice with a cutter, and various requirements can be achieved. It is possible to obtain the core 2 which can correspond to

Next, a method for manufacturing the ribbon core of the present invention will be described with reference to FIG.

In FIG. 2, the wide ribbon core 11 is a ribbon core in which the wide ribbon 13 is wound around the outer periphery of the core 12 cut to correspond to the width of the wide ribbon 13. In the case where a wide ribbon 13 is used, for example, a fax machine, a bar code printer, a ticket issuing machine, a video printer, a CAD printer, a medical printer, etc., the wide ribbon core 11 serves as a supply core and the core 12 serves as a winding core. Used as.

However, a ribbon 1 having a narrower width than this
4 is used, such as a word processor printer,
In typewriters, tape printers, printers for personal computer terminals, correction tape cassettes, adhesive tape cassettes, etc., a narrow ribbon core 15 obtained by cutting a wide ribbon core 11 together with a core 12 with a slicer is used as a supply core.

In step (a), the step of obtaining the long core 1 by extrusion molding is the same as the method for producing the long core 1 in the above-described method for producing the core.

In step (b), the long core 1 obtained in step (a) is cut in accordance with the width of the wide ribbon 13. The core 12 thus cut is applied to a ribbon winding machine (spooling machine) to wind a wide ribbon 13 around the outer peripheral surface thereof. At this time, the unevenness 6 provided on the inner peripheral surface of the core 12 can be fitted to the winding shaft of the ribbon winding machine, and thereby the core 12 can be rotationally driven.

In the step (c), the wide ribbon core 11 obtained in the step (b) is sliced into a desired width using a slicer or the like to manufacture a small ribbon core 15. In that case, it is possible to obtain a core and a ribbon core which have a small dimensional change due to humidity and have a high dimensional accuracy as in a conventional paper tube.

As described above, according to the method for manufacturing a ribbon core of the present invention, compared with the conventional method of manufacturing a ribbon core by winding a ribbon around a core made of a paper tube having a cutout, a ribbon and a core having a wider width are cut. Since it is performed once, the number of steps can be reduced and the cost can be reduced.

Further, according to the core and ribbon core manufacturing method of the present invention, the ribbon 8 having a narrow width as shown in FIG. 3 is used.
It is possible to easily obtain cores and ribbon cores of various widths from the core 7 that holds the core to the core 9 that holds the wide ribbon 10 as shown in FIG. The drive shaft 4 is inserted into the core 7, and the shaft member 5 or the drive shaft provided in the printer main body is inserted into the core 9.

[0029]

According to the manufacturing method of the core and the ribbon core of the present invention, since the core made of a paper tube is not used as in the prior art, the core and the ribbon core are small in dimensional change due to humidity and have high dimensional accuracy. At the same time, paper dust or the like is not generated due to contact friction with the drive shaft or the like, and, for example, when the ribbon is an ink ribbon, the transferred ink will not be blurred.

Further, since the core has a uniform cross-sectional shape, a core having a desired width can be easily obtained only by cutting a long core formed by extrusion molding into a required size. Further, by winding a wide ribbon around a core cut according to the wide ribbon and cutting these at once, a desired narrow ribbon core can be obtained. Therefore, mass production is possible, cost can be reduced, and ribbon cores of all sizes from narrow ribbons to wide ribbons can be easily manufactured.

Further, in the manufacturing process of the long core,
Raw materials such as thermoplastic resins and processing methods can be changed to further improve the dimensional accuracy and mechanical performance of the core.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an example of a method for producing a core of the present invention.

FIG. 2 is an explanatory diagram of an embodiment of a ribbon core manufacturing method of the present invention.

FIG. 3 is a diagram illustrating the use of a core and a ribbon core.

FIG. 4 is an explanatory view of using the core and the ribbon core.

FIG. 5 is an explanatory diagram of a conventional core.

[Explanation of symbols]

 1 long core 2 cores 3 and 6 unevenness 4 drive shaft 5 shaft member 11 wide ribbon core 12 core 13 wide ribbon 14 small ribbon 15 small ribbon core

Claims (2)

[Claims] 1. A substantially hollow cylindrical shape, having an inner peripheral surface having concavities and convexities fitted to a shaft member or a drive shaft provided in the main body of the printing apparatus so as to have a uniform radial cross-sectional shape. A method for manufacturing a core for winding and holding a ribbon around the outer peripheral surface thereof, after forming a long core in the axial direction by extrusion molding with a radial cross section being equal to the radial cross-sectional shape. A method for producing a core, which comprises producing a core having the same cross-sectional shape by cutting the long core into a required length. 2. (a) A hollow-cylindrical shape is provided, and the inner peripheral surface thereof has concaves and convexes fitted to a shaft member or a drive shaft provided in the main body of the printing apparatus so that the cross-sectional shape in the radial direction becomes uniform. And (b) cutting the long core according to the width of the wide ribbon and winding the wide ribbon around the outer periphery of the core, and (c) the wide ribbon. A method for producing a ribbon core, which comprises the step of further cutting a wide ribbon core wound with the tape according to a desired ribbon width.