JPH0644877Y2 - Protective case for tape cartridge - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a protective case for storing and storing a tape cartridge assembled in a book case type.

[0002]

2. Description of the Related Art As a protective case of this type, as shown in FIG. 7, a transparent window 30 is provided in a case body 1 formed by bending a sheet material made of cardboard into a bookcase type, and the transparent window 30 is provided in the case body 1. It has been proposed that when the tape cartridge a as shown is stored, the label 25 attached to the outer surface of the tape cartridge a can be seen from the outside through the transparent window 30. If the transparent window 30 is left in the open state, it allows dust to enter inside, which is not preferable.
Therefore, the transparent window 30 opens the window 31 in the case body 1,
A transparent plastic sheet 32 is provided around the window 31.
Is attached. For example, a protective case of this type is found in Japanese Patent Laid-Open No. 183676/1982.

[0003]

However, in the above-described conventional embodiment, two members, that is, a cardboard sheet material forming the case body 1 and a transparent sheet 32 forming the transparent window 30 are required, and the case body 1 has a transparent sheet. The work of attaching 32 is also troublesome. Therefore, the manufacturing cost is high. In order to solve this problem, it is conceivable that the entire protective case is made of a transparent plastic sheet material. However, in the case of a normal transparent sheet material whose front and back surfaces are smooth, especially when the back surface of the case body is scratched when the tape cartridge is taken in and out, the scratch marks are noticeably unsightly. Further, even when a print indication is put on the outer surface of the case body, the print indication is hard to see because it overlaps with the outline of the tape cartridge which is completely visible inside.

SUMMARY OF THE INVENTION An object of the present invention is to provide a bookcase-type case body made of a single member, that is, a transparent or translucent plastic sheet material, to obtain a protective case with a reduced manufacturing cost. Another object of the present invention is to
This is to obtain a protective case in which the outer surface of the case body is hard to be contaminated and scratches are left on the back surface of the case body when the tape cartridge is taken in and out. Still another object of the present invention is to obtain a protective case that allows a label attached to the tape cartridge to be seen through from the outside when the tape cartridge is housed in the case body.

[0005]

[Means for Solving the Problems] The protective case of the present invention is
The case body 1 is a bookcase type in which the front surface is opened as a loading / unloading port 7 for the tape cartridge a, and the case body 1 is assembled into a bookcase type by bending a transparent or translucent plastic sheet material A. That is, the plastic sheet material A has an outer surface 1a that is smooth and a back surface 1b that is roughened so that the haze value is 5
It is made of a propylene resin sheet set to 0% or less, the back surface 1b constitutes the inner surface of the case body 1, and the tape cartridge a is accommodated in the case body 1 through the loading / unloading port 7. The requirement is that the label 25 attached to the tape cartridge a can be seen through from the outside of the case body 1. Haze here
Is according to JIS K6700, and means the degree to which a light ray incident on a transparent plastic material is diffused, and shows the diffuse transmitted light amount as a percentage of the total transmitted light amount.

[0006]

The plastic sheet material A constituting the case body 1 is made of a transparent or translucent material.
The tape cartridge a originally stored in the case body 1
This is so that the label 25 can be visually recognized from the outside. The outer surface 1a of the plastic sheet material A is made smooth so that even if dust adheres to it, it can be easily wiped off. In addition, the back surface 1b of the sheet material A, that is, the inner surface of the case body 1 is roughened because the back surface 1b is formed by diffusing incident light rays from the outside.
This is to hide the scratches on the side and prevent the internal tape cartridge a from being completely exposed. The transparency of the plastic sheet material A after roughening the back surface 1b is set to 50% or less in terms of haze (haze) because the transparent performance of the label 25 of the tape cartridge a housed in the case body 1 is set. This is to ensure.

[0007]

According to the protective case of the present invention, since the case body 1 can be assembled by bending a single plastic sheet material A, it is suitable for mass production at low cost. Since the back surface 1b of the case body 1 is finished to be rough, by diffusing incident light rays from the outside, even if the back surface 1b has scratches when the tape cartridge a is taken in and out, the scratches can be seen from the outside. It's hard to stand out when you look at it, which is aesthetically advantageous.

Since the outer surface 1a of the case body 1 is finished to be smooth, it is difficult for dust to adhere, and the adhered dust can be easily wiped off. In addition, the smooth outer surface 1a of the case body 1
It is easy to put various print indications on, and even when putting print indications, the back surface 1b has a rough surface finish,
Since the internal tape cartridge a does not become fully visible and the outline of the tape cartridge a and the printed display do not overlap inside and outside, this printed display is also easy to see. Nevertheless, the case body 1
Since the haze value of the transparency is set to 50% or less, even if the back surface 1b of the case body 1 is rough, the label 2 of the tape cartridge a stored in the case body 1
5 can still be seen through from outside, and the intended purpose can be achieved well.

[0009]

1 to 6 show an embodiment in which the present invention is applied to a protective case for a video tape cartridge. Figure 1
In this case, the case body 1 has a back plate 2, left and right side plates 3 and 4 and upper and lower face plates 5 and 6, and the front surface is a book case type that can be opened as a loading / unloading port for the tape cartridge a. The face plates 3 and 4 have notches 9 and 9 for inserting and removing the tape cartridge at the upper and lower intermediate portions of the front edge thereof.

FIG. 2 shows the unfolded state of the case body 1. Left and right side plates 3 and 4 are connected to the left and right sides of the center rear plate 2 through the fold lines 10 and 11, respectively. The notches 9 and 9 are symmetrically inserted in the outer edge of the left side plate 3, the upper surface plate 5 and the lower surface plate 6 are connected to each other above and below the left side plate 3 through the fold lines 12 and 13, and the folding pieces 14 are formed above and below the right side plate 4.・ Line 15
6 and 17 are connected in series and the folding pieces 1 are also provided above and below the back plate 2.
8 ・ 19 are connected in series via broken lines 20 ・ 21. From this unfolded state, each component piece is bent at a right angle through each fold line, the upper surface plate 5 is superposed on the folding pieces 14 and 18 and bonded by ultrasonic welding or hot melt, and on the folding pieces 15 and 19, By stacking the lower surface plate 6 on the above and similarly binding by ultrasonic welding or hot melt, the book case type shown in FIG. 1 is assembled.

In such a protective case, as shown in FIG. 3, the case body 1 is made of a propylene resin having a smooth outer surface 1a and a rough rear surface 1b, and a haze value of 50 to 10%. The sheet material A is formed, and the recording time display 22 and the source display 23 are printed on the outer surface of the sheet material A.

In FIG. 1, the tape cartridge a has transparent windows 24, 24 formed on the left and right of the upper surface of the case wall for observing the tape winding amount with respect to the built-in tape reel, and between the left and right transparent windows 24, 24. A label 25 is attached. The label 25 is composed of a print label portion 25a on which various performances are printed and displayed, and a writing label portion 25b on which recording contents are written by a user.

In the state where the tape cartridge a is inserted and stored in the case body 1, the above-mentioned display is provided at a proper position except the central portion 26 (the portion surrounded by a virtual line in FIG. 1) of the left side plate 3 of the case body 1 corresponding to the label 25. 22.2
3 is printed. This printing may be entirely performed except for the corresponding portion 26 so that the inside of the case can be seen through only from the corresponding portion 26. At this time, with the tape cartridge a stored, at least the corresponding portion 26 of the case body 1 corresponding to the label 25 of the tape cartridge a.
Is transparent, so that the label 25 can be seen from the outside through the portion 26 without any trouble.

Incidentally, a transparent sheet material A made of propylene resin
When the raw material propylene resin is melted and softened to form a sheet, the propylene resin is passed between a roughening roll 28 and a pressure contact roll 29 pressed against the roughening roll 28 as shown in FIG. 4, and the outer surface 1a remains a smooth surface. Only the back surface 1b is roughened to form a roughened sheet. At this stage, the haze of the sheet material A is 50
% Or less, more preferably 20% or less to ensure necessary and sufficient transparency. In this case, the roughening roll 2
8 is plated to make the surface of the unevenness formed on the back surface 1b of the sheet material A a mirror surface. Next, after the printing process is performed on the smooth surface 1a of the sheet material A, a large number of stacked sheet materials A are scooped out one by one and die-molded in units of several as shown in FIG. Since the back surface 1b of the sheet material A is roughened, it is possible to surely scoop one by one even when a large number of these are stacked. Subsequently, as shown in FIG. 6, embossing is performed under heating to insert the fold line, and as shown in FIG. 2, assembly is performed.

As the plastic sheet material A, those made of vinyl chloride resin and those made of propylene resin are generally mentioned. Of these, the stretched vinyl chloride resin sheet material has excellent transparency, and there are many hot melt adhesives suitable for vinyl chloride resin. However, even if a transparent sheet material made of vinyl chloride resin is provided with a fold line, the hinge property when bent at a right angle along the fold line next time is poor, and it is difficult to fold it at a right angle. In addition, in particular, the drawn product is apt to be deformed when the bent component pieces are heated and bonded by hot melt or ultrasonic welding, and the product is not finished neatly.

In this respect, a sheet material made of a propylene resin, for example, a block polymer or a copolymer of ethylene and propylene, has a good hinge property once the broken line is inserted, so that a straight line can be easily formed through the broken line. It can be bent and has good workability. Then, a highly transparent unstretched propylene resin sheet material has appeared, and a hot melt adhesive suitable for the sheet material has been developed. Therefore, the propylene resin is the most preferable material for the sheet material A. Needless to say, the tape cartridges to be stored include various types of video cartridges and audio cartridges.

[Brief description of drawings]

FIG. 1 is a perspective view showing a protective case and a target tape cartridge according to the present invention.

FIG. 2 is a development view of a protective case.

FIG. 3 is a cross-sectional view of a sheet material forming a case body of a protective case.

FIG. 4 is a schematic perspective view showing an apparatus for roughening the back surface of a sheet material.

FIG. 5 is a perspective view showing a state where a sheet material is die-cut and molded.

FIG. 6 is a schematic cross-sectional view showing an apparatus for forming a polygonal line on a sheet material.

FIG. 7 is a perspective view showing a conventional protection case.

[Explanation of symbols]

 1 Case body A Sheet material 1a Sheet material outer surface 1b Sheet material back surface a Tape cartridge 25 Tape cartridge label

Claims (1)

[Scope of utility model registration request] 1. The case body 1 is of a bookcase type in which the front surface is opened as a loading / unloading port 7 for the tape cartridge a. The case body 1 is formed by bending a transparent or translucent plastic sheet material A. It is assembled in a mold. The plastic sheet material A has a smooth outer surface 1a and a back surface 1
Haze is 50% by roughening b
It consists of a propylene resin sheet set below,
The back surface 1b constitutes the inner surface of the case body 1, and in the state where the tape cartridge a is accommodated in the case body 1 through the loading / unloading port 7, the label 25 attached to the tape cartridge a has a label 25 outside the case body 1. A protective case for a tape cartridge, which can be seen through.