JPH0638008U - Finishing device for flexible magnetic recording media - Google Patents

Abstract

(57) [Abstract] [Purpose] Burrs formed at the edges of a flexible magnetic recording medium formed by cutting or punching a raw material into a predetermined shape can be removed with a simple structure, which is inexpensive and excellent in quality. A finishing device for a flexible magnetic recording medium capable of obtaining a flexible magnetic recording medium. A pair of cutting blades 2, 3 with which cutting edges 2a, 3a can abut in the vicinity of an outer peripheral edge 1a of a flexible disk 1 rotatably driven by a drive shaft 6 so as to press the outer peripheral edge 1a from both upper and lower sides. To place. The periphery of the cutting blades 2 and 3 is covered with a chamber 4, and the burrs on the outer peripheral edge 1a are removed by the cutting blades 2 and 3 while sucking shavings with a suction device connected to the chamber 4.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention provides a flexibility for removing burrs formed on the edges of a magnetic tape cut from a raw material into a strip or a flexible disk punched into a predetermined shape in the process of finishing a flexible magnetic recording medium. The present invention relates to a finishing device for a magnetic recording medium.

[0002]

[Prior art]

 Generally, a flexible magnetic recording medium such as a magnetic tape or a flexible disk has a thin and wide layer such as a magnetic recording layer or a protective layer formed on both sides of a wide and long flexible belt-shaped support by a method such as coating or vapor deposition. The original fabric is formed by cutting it into a predetermined width or punching it into a donut disk shape.

Therefore, when the raw material is cut into a predetermined width or punched into a donut disk shape, burrs may occur on the cut end surface or the punched end surface. If such minute burrs fall off on the recording surface, it may cause so-called dropout due to writing / reading errors of electric signals. Therefore, burrs on the cutting surface must be removed during the processing and assembly process. I won't. Therefore, a finishing device for the flexible magnetic recording medium is required in the finishing process of the flexible magnetic recording medium.

As a conventional finishing device for a flexible magnetic recording medium, there is a finishing device for a flexible disk disclosed in, for example, JP-A-63-311625. This is because a plurality of polishing tapes wound around a plurality of polishing tape rolls are brought into contact with the outer peripheral end surface of a floppy disk (flexible disk), and the floppy disk is moved by a polishing means that is run in the disk rotation direction or in the opposite direction. The cut surface is polished.

[0005]

[Problems to be solved by the device]

 However, in the conventional finishing apparatus for a flexible magnetic recording medium as described above, the polishing tape drive mechanism for running the polishing tape wound around the polishing tape rolls, which are respectively supported by the polishing tape driving mechanism, is provided. Since it is necessary to provide it around the flexible magnetic recording medium, there is a problem that the device becomes complicated and the equipment cost becomes expensive.

Therefore, an object of the present invention is to solve the above-mentioned problems, and a burr formed on the edge of a flexible magnetic recording medium formed by cutting or punching a raw material into a predetermined shape is formed with a simple structure. An object of the present invention is to provide a finishing device for a flexible magnetic recording medium that can be removed and can obtain an inexpensive flexible magnetic recording medium.

[0007]

[Means for Solving the Problems]

 The above-mentioned object of the present invention is to provide at least a pair of cutting blades arranged so that the cutting edges can come into contact with each other in order to press the edges of a rotating or running flexible magnetic recording medium from above and below, and in the vicinity of the cutting blades. A flexible magnetic recording medium having a suction means provided therein, and removing the burrs at the edges of the flexible magnetic recording medium by the cutting blade while suctioning shavings by the suction means. It is achieved by the finishing device of the recording medium.

The suction means may be constituted by a chamber covering the cutting portion of the cutting blade and a suction device connected to the chamber, or a suction port formed in the cutting blade and the suction port. It can be configured with a suction device connected.

[0009]

Embodiment

 Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The finishing device for a flexible magnetic recording medium shown in FIGS. 1 to 3 is a disc finishing device for removing burrs on the outer peripheral edge of a flexible disc 1 which is a flexible magnetic recording medium punched from an original material. Is.

As shown in FIG. 2, the flexible disk 1 has a drive shaft 6 in which a circular recess 6a is formed in the center of the end face centered on the rotation drive shaft, and the recess 6a described above is provided in the center of the opposite end face. With the driven shaft 7 having the circular protruding portion 7a formed therein, the disk inner peripheral portion is rotated at a high speed in the direction of arrow R, for example, at 1000 to 3000 revolutions per minute while the disc inner peripheral portion is held from both upper and lower surfaces. . A shallow circular tray-shaped spindle hub 11 is fixed to the central hole of the flexible disk 1.

As shown in FIG. 3, in the vicinity of the outer peripheral edge 1a of the flexible disk 1, a cutting blade 2 having a cutting edge 2a that abuts to press the outer peripheral edge 1a from a lower surface side at a predetermined angle, A cutting blade 3 having a cutting edge 3a that abuts to press the outer peripheral edge 1a from the upper surface side at a predetermined angle is arranged at a predetermined distance. The cutting blades 2 and 3 are respectively held by a blade advancing / retreating means 5 so as to be movable in the radial direction of the flexible disk 1, and the cutting edges 2a and 3a are brought into contact with the outer peripheral edge 1a with an appropriate contact pressure. Is adjusted accordingly. In the present embodiment, the material of the cutting blades 2 and 3 is made of super steel as a cutting edge so as to have a long life. However, the material is not limited to this and may be tool steel or stainless steel having high hardness.

The periphery of the cutting blades 2 and 3 is covered with a chamber 4 which is a box whose side surface facing the flexible disk 1 is open, and a suction device (not shown) connected to the chamber 4 (for example, The chamber 4 together with a powerful blower, a vacuum pump, etc., constitutes suction means. Therefore, while rotating the flexible disk 1, the cutting blades 2 and 3 are moved in the direction of the outer peripheral edge 1a, and the cutting edges 2a and 3a are brought into contact with the outer peripheral edge 1a, thereby the outer peripheral edge 1a. To remove burrs. At this time, the cutting blades 2 and 3 are arranged close to each other, and the cutting edges 2a and 3a abut against the upper and lower surfaces of the flexible disk 1 from above and below, so that the outer peripheral end The edge 1a is held in the thickness direction by the cutting blades 2 and 3, and the thin flexible disk 1 is prevented from bending. Further, since cutting scraps such as burrs cut by the cutting blades 2 and 3 are immediately sucked and discharged by the suction means, the cutting scraps do not adhere to the surface of the flexible disc 1.

That is, in the disk finishing device, the cutting blades 2 and 3 do not need to have a rotation driving means, and the suction means can be easily routed through a hose or the like, so that the structure is simplified. Equipment costs can be reduced. Further, the cutting blades 2 and 3 integrated with the chamber 4 are simply retracted outward in the radial direction of the disk as soon as the grinding work is completed, and the flexible disk held by the drive shaft 2 Since 1 can be exchanged, the disc exchange time can be shortened. Therefore, the working efficiency is increased and the manufacturing cost can be reduced, so that the flexible magnetic recording medium can be manufactured at low cost.

FIG. 4 shows a finishing device for a flexible magnetic recording medium according to another embodiment of the present invention, which is a magnetic tape which is a flexible magnetic recording medium obtained by cutting a raw material into a predetermined width. It is a magnetic tape finishing device for removing burrs on both end edges of 21. The magnetic tape 21 wound around a delivery roll (not shown) is driven at high speed by a winding roll (not shown) to be conveyed at high speed in the direction of arrow V.

In the vicinity of both end edges 21a of the magnetic tape 21, cutting blades 22, 23 and cutting blades 26, 27, which are arranged at a predetermined interval and form a pair, are arranged on the respective end edges 21a side. . The cutting blades 22 and 26 have cutting edges 22a and 26a that come into contact with each other to hold down the end edges 21a from a lower surface side at a predetermined angle, and the cutting blades 23 and 27 have a predetermined angle from the upper surface side. It has cutting edges 23a, 27a that abut against the edge 21a to hold it down. The cutting blades 22, 23, 26, 27 are movably held by the blade advancing / retreating means 5 in the width direction of the magnetic tape 21, and the cutting edges 22a, 23a, 26a, 27a are respectively at the both end edges 21a. The burrs on both end edges 21a are cut and removed so that the burrs on the both edges 21a are appropriately adjusted so as to come into contact with each other at an appropriate contact pressure.

The circumferences of the cutting blades 22 and 23 and the cutting blades 26 and 27 are covered with chambers 24 and 24, which are boxes having side surfaces facing the magnetic tape 21, respectively. The chambers 24, 24 together with a suction device (not shown) connected to the chambers 24, 24 constitute suction means. Therefore, in the magnetic tape finishing device, the cutting blades 22 and 23 and the cutting blades 26 and 27 do not need to be provided with a rotational driving means, and the suction means can be arranged in the same manner as the disk finishing device of the above embodiment. Since it can be performed via a hose or the like, the structure is simple and the manufacturing cost can be reduced.

FIG. 5 shows a cutting blade according to another embodiment of the present invention. Instead of the solid cutting blade in the above-described embodiment, a grinding tool formed of cemented carbide at the end of the cutting tool shank 7 is used. The blade 8 is attached by screwing. As shown in FIG. 6, the grinding blade 8 is an equilateral triangular blade having a screw hole 8a formed in the center thereof, and each side has a cutting edge with a rake angle θ. If it is blunt, rotate it 120 ° and fix it to make a new blade.

FIG. 7 shows a cutting blade portion used in a finishing device for a flexible magnetic recording medium according to another embodiment of the present invention. The cutting blade 9 has an end on the side of the cutting edge 9a inside the cutting blade. To the other end, a suction port 10 is bored. A hose 12 connected to a suction device (not shown) is attached to the opening of the suction port 10 on the side opposite to the end of the cutting edge 9a, and the suction port 10 constitutes suction means together with the suction device. is doing. The hose 12 is provided with a bellows portion 12a so as not to hinder the movement of the cutting blade 9 in the longitudinal direction.

Therefore, the cutting blade 9 can immediately suck the burr debris ground by the blade edge 9a into the suction port 10 to improve the removal efficiency and eliminate the need for the chamber as described above. The part structure can be made more compact. The present invention is not limited to the shape of the cutting tool and the shape of the chamber in each of the above-mentioned embodiments, and it goes without saying that various forms can be adopted based on the spirit of the present invention.

[0020]

[Effect of device]

 As described above, the finishing apparatus for a flexible magnetic recording medium according to the present invention has at least a pair of cutting elements arranged such that the cutting edges can come into contact with each other in order to press the edge of the rotating or running flexible magnetic recording medium from both upper and lower sides. By the suction means provided in the vicinity of the blade, it is possible to remove the burrs on the edge of the flexible magnetic recording medium by the cutting blade while suctioning the shavings. Therefore, since the cutting blade does not need to be provided with a rotation driving means and the suction means can be easily routed through a hose or the like, the structure can be simplified and the facility cost can be reduced and the working efficiency can be improved and the manufacturing cost can be improved. Therefore, the flexible magnetic recording medium can be manufactured at low cost.

Therefore, it is possible to remove the burr generated at the edge of the flexible magnetic recording medium formed by cutting or punching the raw material into a predetermined shape with a simple structure, and the flexible magnetic recording is inexpensive and excellent. A finishing device for a flexible magnetic recording medium capable of obtaining a medium can be provided.

[Brief description of drawings]

FIG. 1 is a plan view showing a main part of a disk finishing device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along arrow AA of a main part of the disc finishing apparatus shown in FIG.

FIG. 3 is an enlarged perspective view of the cutting blade shown in FIG.

FIG. 4 is a plan view showing a main part of a magnetic tape finishing device according to another embodiment of the present invention.

FIG. 5 is a side view of a cutting blade according to another embodiment of the present invention.

6 (a) and 6 (b) are a front view and a side view of the grinding blade shown in FIG.

FIG. 7 is an enlarged perspective view of a cutting blade portion according to another embodiment of the present invention.

[Explanation of symbols]

 1 flexible disk 1a outer peripheral edge 2 cutting blade 2a cutting edge 3 cutting blade 3a cutting blade 4 chamber 5 blade advancing / retreating means 6 drive shaft 7 driven shaft

Claims (3)

[Scope of utility model registration request] 1. At least a pair of cutting blades, which are arranged such that the cutting edges can come into contact with each other so as to press the edges of a rotating or running flexible magnetic recording medium from above and below, and are provided in the vicinity of the cutting blades. A finishing device for a flexible magnetic recording medium, comprising a suction means, and removing burrs at the edges of the flexible magnetic recording medium by the cutting blade while sucking shavings by the suction means. 2. The flexible magnetic recording medium according to claim 1, wherein the suction means includes a chamber covering the cutting portion of the cutting blade and a suction device connected to the chamber. Finishing equipment. 3. The flexible magnetic recording according to claim 1, wherein the suction means comprises a suction port bored in the cutting blade and a suction device connected to the suction port. Media finishing equipment.