JPH0245915Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Field of the Invention>> The present invention relates to an interior material for a musical instrument case.

<<Background of the invention>> Musical instrument cases used for wind instruments, etc., are usually made by fitting and fixing an interior material with irregularities that correspond to the external shape of the musical instrument and its accessories inside the case exterior body, which is rigid. This is designed to prevent the instrument from moving within the case during transportation.

This interior material is made by laminating a decorative sheet material made of soft cloth or the like that serves as both decoration and cushion to the surface of a core material having an uneven part shaped like a musical instrument.

In order to manufacture interior materials, conventionally, a woven fabric such as rayon was attached by hand to the surface of a core material made of styrofoam formed into a predetermined uneven shape. However, the manual method requires a large amount of man-hours, and it is difficult to obtain uniform quality, and the unit price of each product is also on the rise.

Recently, as an alternative to hand pasting, sheeting thermoplastic cloth made of threads made of heat-shrinkable resin material is sheeted onto a core material made of a thermoplastic resin plate, and then press-molded by applying heat and pressure. Then,
There is one in which a decorative sheet material is laminated and glued onto a core material.

However, this interior material has the disadvantage that the thermoplastic cloth itself is expensive and the unit price of the product is high.

In addition, thermoplastic cloth has short piles, has an inferior appearance, and has poor properties as a cushion material for musical instruments.

<<Purpose of the invention>> The object of the invention is to obtain a homogeneous interior material that is inexpensive, has rich cushioning properties, and is aesthetically beautiful.

<<Structure of the invention>> In order to achieve the above object, the present invention provides a musical instrument case in which an interior material is fitted and fixed inside an exterior body, in which the interior material is attached to the surface of a plate-shaped thermoplastic resin core material. , a case for a musical instrument, characterized in that it is made by laminating decorative sheet materials made of stretchable knitted fabric materials such as knits, piles, stickers, etc., and pressing them to form unevenness in the shape of a musical instrument and laminating them into one piece. It provides interior materials for

"Example" FIG. 1 shows a musical instrument case according to the present invention.

In the figure, 1 is a case exterior body, and 3 is a cover exterior body.

An interior material 4 having an uneven portion 4a corresponding to the shape of the musical instrument is fitted and fixed inside each of the exterior bodies 1 and 3, respectively.

Each interior material 4 has a core material 5 formed by heating, plasticizing, and press-molding a polypropylene resin, polystyrene resin, vinyl chloride resin, or other thermoplastic resin plate, as shown in the enlarged view in part A. and a decorative sheet material 7 laminated and adhered to the surface of the core material 5 via an adhesive layer 6.

This decorative sheet material 7 is made of a stretchable knitted fabric material such as rayon, pile, seal, etc.
The pile is as short as 2 mm, and usually 5 to 9 mm. If a pile with a particularly long pile is used, it will have a rich cushioning effect on large musical instruments, and will also have a good feel and texture.

The decorative sheet material 7 is trim-cut to be slightly larger than the outer peripheral shape of the core material 5, and after adhesive molding, the outer peripheral edge of the decorative sheet material 7 is trimmed into the core material 5.
By winding it around the back side and fitting it into each of the exterior bodies 1 and 3, a musical instrument case in which each part is integrated is completed.

Next, the manufacturing order of the interior material constructed as above will be explained.

Figures 2 (1) to (3) are process explanatory diagrams of this invention.

First, as shown in (1), a press molding material in which a knitted fabric material c is sheeted on a thermoplastic resin plate a such as polypropylene cut to a predetermined size via an adhesive sheet b is passed through the heater 20. The resin plate a is heated to a temperature above the softening point and below the melting point to plasticize it.

Next, as shown in (2), a heat-plasticized resin plate a is placed on the mold surface 22 of the lower mold 21 constituting the press mold.

Note that the mold surface 22 of the lower mold 21 is formed with unevenness corresponding to the shape of the above-mentioned musical instrument, and furthermore, the mold surface 22 of the lower mold 21 is
A cooling water channel 21a is formed inside.
Further, the adhesive sheet b and the knitted fabric material c are trim-cut to have a size slightly larger than the outer diameter of the resin plate a.

Immediately after setting, the upper die 23 is engaged with the lower die 21 and pressing pressure is applied.

This upper mold 23 has a mold surface 2 corresponding to the mold surface shape.
4 is formed therein, and a cooling water channel 23a is also formed therein as described above.

If sufficient pressure is applied and cooling water is passed through each of the cooling channels 21a and 23a, the resin plate a will be cooled and solidified in the molded state.

Moreover, the decorative sheet material c is also deformed at the same time and is integrally molded with the resin plate a.

After cooling, the upper mold 23 is raised and the molded product is removed from the mold to obtain the interior material 4 as shown in FIG.

Note that the mold may be cooled by air cooling.

<<Effects of the invention>> As explained above, the interior material of the musical instrument case according to the invention has long piles on the surface and has excellent characteristics as a cushion material for musical instruments. Also,
It is possible to obtain an interior material that is inexpensive and rich in feel and texture. Furthermore, since the decorative sheet material can be integrally molded at the same time as the core material in one shot using hot pressure, the number of man-hours can be extremely simplified.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a musical instrument case according to this invention, and FIGS. 2 (1) to (3) are explanatory diagrams showing the manufacturing process thereof. DESCRIPTION OF SYMBOLS 1... Case exterior body, 3... Cover exterior body, 4... Interior material, 4a... Recessed part, 5... Core material, 6... Adhesive layer, 7
... Decorative sheet material, a... Thermoplastic resin plate, b... Adhesive sheet, c... Knitted fabric material.

Claims (1)

[Scope of utility model registration request] In a musical instrument case in which an interior material is fitted and fixed inside an exterior body, the interior material is made of a stretchable knitted fabric material such as knit, pile, seal, etc. on the surface of a plate-shaped thermoplastic resin core material. An interior material for a musical instrument case, characterized in that decorative sheet materials are laminated and pressed to form unevenness in the shape of a musical instrument, and are then integrally laminated and molded.