JPH0478083A - Disk storage case - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a disk storage case in which storage disks such as floppy disks and optical disks are externally driven and recorded and reproduced while the storage disks are stored therein.
In particular, the present invention relates to improvements in nonwoven fabric liners arranged on the inner surface of cases.

(Prior art and its section M) Storage cases for storage disks include hard so-called disk cassettes, which are made by joining two shells obtained by injection molding, and so-called disk jackets, which are formed by bending polyvinyl chloride resin sheets. .

On the inner surface of the disk cassette, a nonwoven fabric liner punched out in a circular shape in advance is bonded to the inner surface of the disk cassette using dotted or linear fused portions.

Also, some disk jackets are obtained by punching out a nonwoven fabric into a predetermined shape and pasting it onto a jacket sheet.

However, conventionally, the unlined fabric liner was punched out using a Thomson blade or the like at room temperature, which caused the problem that fibers came loose from the cut end, causing errors.

Also, is there a way to use a heated punching blade to melt the cut end and prevent the fibers from fraying?
Depending on the material of the nonwoven fabric liner, there are drawbacks such as "stringing" of the molten resin and the gradual adhesion of chips to the punching blade.

(Means for Solving the Problems) The present invention is a disk storage case characterized in that a nonwoven fabric liner punched out around the periphery by ultrasonic vibration heating is provided on the inner surface of the case for storing a storage disk. This melts the cut ends of the nonwoven fabric liner and eliminates frayed fibers, and also has the effect of not causing stringiness or adhesion of chips.

The present invention will be explained in detail below with reference to the drawings.

FIG. 1 is an exploded perspective view showing an example of a gauge (cassette) of the present invention, FIG. 2 is a plan view of an example of a nonwoven fabric liner, and FIG. 3 is a side view of a liner punching device.

The cassette 1 is made by joining upper and lower cassette halves 11 and 12 made of ABS resin or the like by ultrasonic welding or the like.
Predetermined openings such as a center window 13 and a head window 14 are provided.

A disk 2 is housed in a cassette 1, and a nonwoven fabric liner 3 is adhered to the inner surface of the cassette 1.

This non-woven fabric liner 3 is punched out around the periphery 31 by ultrasonic vibration heating, thereby preventing the binder resin of the non-woven fabric from melting at the cut end and causing no fraying of the fibers.

That is, as shown in FIG. 3, a liner material 3- is placed on the ultrasonic oscillation horn 5, a punching blade 4 is placed on it,
The ultrasonic oscillation horn 5 is caused to oscillate while the liner material 3- is pressurized by the punching blade 4.

As a result, the liner material 3- is cut into the shape shown in FIG. 2 by the punching blade 4 while generating heat, and the fibers around the liner 3 are melted and bonded to each other, so that fraying of the fibers does not occur.

When the ultrasonic oscillation horn 5 stops oscillating after punching is completed, the punching blade 4 itself is not heated, so the area around the liner 3 is immediately cooled, and the resin in the liner 3 does not adhere to the punching blade 4. , there is no stringing or bending.

The material of the ultrasonic oscillation horn 5 may be aluminum alloy, etc., but the part that contacts the punching blade 4 may be coated or pasted with ceramics such as titanium carbide or titanium nitride to increase surface hardness and increase durability. It is preferable to improve

The liner 3 thus formed into a predetermined shape is fixed to the inner surface of the cassette by dotted, linear, etc. fused portions, as in the conventional case.

Punching by ultrasonic vibration heating is particularly suitable for punching nonwoven fabrics made of plastic fibers (polyester, polypropylene, polyamide, acrylic resin, etc.) or nonwoven fabrics made of a mixture of these plastic fibers and rayon fibers.

Although the above description has been made with respect to a disk cassette, it can be similarly applied to a type of disk jacket in which nonwoven fabric is punched out in advance and adhered to the inner surface of the sheet.

(Example) (Example 1) Made of 50% rayon and 50% polyester, thickness 0.
Using the device shown in Figure 3, a 2 mm thick nonwoven fabric was pressed with an ultrasonic oscillation horn of 0.5 kg while pressing the punching blade at 50 kg.
It was oscillated for seconds and punched out into the shape shown in FIG. 2 (outer diameter 87 mm, inner diameter 35 mm). For comparison, punching was performed at room temperature with a Thomson blade.

Then, the end of each liner was vacuumed for 5 seconds while vibrating, the loose fibers were collected, and the number of fibers per liner was counted by length.

The results are shown in Table 1.

Table 1 (Effects of the Invention) According to the present invention, as is clear from the results of the examples, the amount of fibers coming out from around the nonwoven fabric liner is significantly reduced, so there is less dropout caused by fiber waste. , a highly reliable disk storage case can be obtained.

[Brief explanation of drawings]

FIG. 1 is a developed perspective view of an example of the gauge of the present invention, FIG. 2 is a plan view of an example of a nonwoven fabric liner, and FIG. 3 is a side view of a liner punching device. ]...Cassette 1-3...Non-woven fabric liner 31...Around the non-woven fabric liner

Claims (1)

[Claims] A disk storage case for storing a storage disk, characterized in that a nonwoven fabric liner punched out around the periphery by ultrasonic vibration heating is arranged on the inner surface of the case.