JP2864935B2 - Disc tray - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc tray used for an autochanger device or the like suitable for a circular disc such as a compact disc.

[0002]

2. Description of the Related Art Conventionally, compact discs have been used in the field of audio equipment and 0A equipment, and can deal with digitized data as compared with those of analog discs. Has also spread rapidly in recent years. In order to take advantage of such a point, the compact disc is considered to be, for example, an automatic multi-disc player for business use, and is realized by a so-called jukebox or a disc autochanger device corresponding to a karaoke device.

As the above-mentioned disk autochanger device, there is provided a disk tray device provided with a plurality of disk storage grooves for storing a plurality of (for example, 20 to 100) disks separately. of the disk, which automatically play searches the desired disk, for example, Japanese Utility Model 60 over 111 545
There is a disk autochanger device described in Japanese Patent Application Laid-Open Publication No. HEI 9-125, and FIG. 4 and FIG. 28 show a disk tray.

[0004] Such a disk tray separates disks from each other when a hard disk having a fine surface such as a compact disk is loaded and unloaded.
The septum and the disk will rub against each other. As a material of the conventional tray body, generally, a resin composition such as acrylonitrile-butadiene-styrene (ABS) resin and polystyrene (PS) resin has been used.

[0005]

In general, a compact disc or the like has a surface mainly made of polycarbonate resin and has fine irregularities. When the disc and the tray main body are rubbed, the surface of the compact disc is reduced. Low hardness
Since the non-slippery partition walls, that is, the tray body, are shaved, the shaved powder adheres to the disk surface, causing malfunction, and the disk may be damaged by the sharp corners formed by the disk. There is a problem that it may cause a malfunction by doing so.

[0006] Further, since the tray body is made of the ABS resin or the PS resin by injection molding when the tray body is manufactured, the flow of the resin is improved at the time of molding and the shrinkage ratio is small and stable. If this is made of polycarbonate resin of the same material, the shrinkage is small, but the hardness is the same and it is difficult to slip, and scratches are likely to occur on the disc and the partition wall of the tray body On the other hand, when a normal olefin resin such as a polypropylene resin is used, it is slippery and soft, so that it is not scratched, but the change in shrinkage due to the difference in wall thickness is large, and the wall thickness is partially increased. was forced to the smoothness of the barrier not obtained mad change, because the warp comes out, the signal surface of the disk is rubbed, there still scratching it and if there is garbage in, requires the disk for the warp Can not be maintained in accuracy, malfunction for causing tilting there is a problem easily occurs.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has a tray body provided with a plurality of disk accommodating grooves for accommodating a plurality of molded bodies and accommodating a plurality of disks respectively. In the disc tray held on both sides of the tray support frame on both sides of the tray support frame, the material of the tray body
Specific gravity is 0.99 or more and molding shrinkage is 0.8%
A disc tray characterized by using the following olefin resin.

[0008]

As described above, in the present invention, the resin is used for the wall member of the tray main body, so that the sliding property is enhanced, the disk is not easily damaged, and the disk is not damaged by the disk. In addition, since the shrinkage rate was small during injection molding, warpage hardly occurred and a highly accurate disc tray was produced. The operation was not performed during use, and the surface hardness of the tray body was H or more, and preferably F or more.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail. FIG. 1 is a front view showing an embodiment of a disc tray according to the present invention. As shown in FIG. 1, the disc tray according to the present invention has a tray body 1 having a groove 10 for accommodating a plurality of discs separately.
And a tray support frame 2 to which the tray main body 1 is attached.

The tray body 1 has a large number (for example, 2) of wall members 11 formed of plastic as shown in FIG.
(0 to 100 sheets) in the form of a tray stacked side by side in the horizontal direction. Here, reference numeral 12 denotes a concave portion provided on both sides of the partition wall 13. The concave portion 12 forms a groove portion 10 for accommodating the disk D as shown in FIG. Although not shown in FIG. 1, reference numeral 14 denotes a hole through which a rod for stacking the wall member 11 as a tray main body and attaching the rod to the tray support frame 2 is provided.

The wall member 11 is made of ABS resin, PS
In the present invention, instead of the resin, an olefin resin having a specific gravity of 0.99 or more and a molding shrinkage of 0.8% or less without using a pigment or the like is used. Examples include a dodecene copolymer, an ethylene-bicycloheptoene copolymer, and an ethylene-tricycloundicene copolymer. By using the above resin, even if the surface hardness is high at the part that can be contacted when inserting and ejecting the disk, it has good slipperiness, so it will not be scratched and the dimensional accuracy at the time of molding will be the same as the conventional AB.
It is obtained in the same way as S resin and PS resin. In addition, the surface hardness is higher than that of the lower one, and the pencil hardness is HB or higher.
The above is good. Antistatic agent contained in the above resin (kneaded)
If it does, it will be better against scratches.

Specific examples of the above ethylene-tetracyclododecene copolymer include ethylene-tetracyclo [4.4.0.1 ^2,5 . 1 ^7,10 ] -3-dodecene copolymer, ethylene-8-butyltetracyclo [4.
4.0.1 ^2,5 . 1 ^7,10 ] -3-dodecene copolymer, ethylene-8-ethyltetracyclo [4.4.0.
1 ^{2, 5.} 1 ^7,10 ] -3-dodecene copolymer, ethylene-
8-stearyltetracyclo [4.4.0.1 ^2,5 . 1
^7,10 ] -3-dodecene copolymer, ethylene-9-ethyl-11.12-dimethyltetracyclo [4.4.0.1
^2,5 . 1 ^7,10 ] -3-dodecene copolymer and the like can be used.

The wall member 1 is molded using the above resin having a specific gravity of 1.03, a surface hardness of F, and a molding shrinkage of 0.5 to 0.6%. As a result of the test, in the case of molding using the conventional ABS resin, the disk was put in and taken out 10,000 times, and powder generation occurred in 2 out of 10 units.
On the other hand, in the same test, no powder generation was found in 10 units.

[0014]

According to the present invention, the wall member of the tray body is made of a cyclic olefin polymer as the above-mentioned material.
Since the tetracyclododecene copolymer is used, the slipperiness is increased, and the disk is not easily damaged, and conversely, the disk does not damage the tray body. In addition, since the shrinkage ratio is small during injection molding, warpage hardly occurs and a highly accurate disc tray can be formed, and malfunction does not occur during use.

[Brief description of the drawings]

FIG. 1 is an explanatory sectional view showing one embodiment of a disc tray of the present invention.

FIG. 2 is an explanatory perspective view showing one embodiment of a wall member used in the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tray main body 2 Tray support body 10 Groove part 11 Wall member 12 Depression 13 Partition wall 14 Hole

Claims (2)

(57) [Claims] 1. A disc tray having both sides of a tray main body provided with a plurality of disc storage grooves for accommodating a plurality of molded bodies and separately storing a plurality of discs, which is held on both end side plates of a tray support frame. As the material of the tray body
A disc tray using an olefin resin having a specific gravity of 0.99 or more and a molding shrinkage of 0.8% or less. 2. The disk tray according to claim 1, wherein an ethylene-tetracyclododecene copolymer is used as the olefin resin.