JP2003165577A - Storage case - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a storage case excellent in protection of a stored article by causing a storage recess to have both sufficient cushioning property for the article and high immobile holding ability. <P>SOLUTION: The storage case comprises a body 2 and a lid. The body 2 has a hollow double-wall structure. The body 2 has a storage recess 5. Foams 8 and 9 are provided along an internal side face 5a and a bottom face 5b of the recess 5. A compressive strength or a density of the foam 8 is 0.05 to 0.45 kg/cm<SP>2</SP>or 0.025 to 0.1 g/cm<SP>3</SP>. A compressive strength or a density of the foam 9 is 0.02 to 0.07 kg/cm<SP>2</SP>or 0.015 to 0.03 g/cm<SP>3</SP>. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is capable of accommodating, safely storing and carrying articles such as various electronic equipments, measuring equipments, optical equipments, etc., which are precise and must avoid mechanical vibration and impact. It relates to a plastic storage case that can be made.

[0002]

2. Description of the Related Art Video cameras, personal computers,
There are various plastic storage cases for storing and carrying items that need to be protected from vibrations and impacts, such as word processors, electronic instruments such as electronic musical instruments, measuring instruments, and optical instruments. JP-A-58-58
It is described in Japanese Patent No. 9387. Further, the one in which a cushioning material is fitted in a part of the storage recess and the inner surface is covered with a skin sheet is described in Japanese Utility Model Laid-Open No. 64-39218.

[0003]

By the way, in this type of storage case, the stored articles are relatively large,
Further, in the case of a large weight, the storage recess must be made of a cushioning material having a relatively high hardness in order to provide a required immovability holding property to the stored article. No. 9387, the inner surface of the storage recess of a single-wall structure is formed of urethane foam, and the actual construction of Shokai 64-39218.
It has been found that a storage case having a cushioning property fitted to a part of the storage recess and having an inner surface covered with a skin sheet as described in Japanese Patent Publication cannot provide a storage case having a sufficient cushioning property for stored items. did.

Furthermore, in the current situation, the contact area between the stored article and the cushioning material differs depending on the direction of the drop due to the impact such as dropping, and the required characteristics of the cushioning material differ depending on the position provided in the recess.

Therefore, the present invention is intended to solve such problems, and a foam having different compressive strengths or densities is additionally provided in a part of the inner side surface and the bottom surface of the storage recess and in other parts. With such a configuration, it is intended to provide a storage case having excellent cushioning property and high immovability retention property for the items to be stored in the storage recess, and excellent protection of the stored items. is there.

[0006]

A storage case according to the present invention comprises a main body and a lid, as described in claim 1,
And at least one of them is a hollow double-wall structure having an outer wall and an inner wall facing each other and having a hollow portion therebetween,
A storage case made of plastic in which one or a plurality of storage recesses are formed on the inner wall of a hollow double-walled structure, and a foam having different compressive strength or density depending on a part of the inner side surface and the bottom surface of the storage recess and other parts. It is characterized by having a body attached.

Further, as described in claim 2, the storage case according to the present invention has, in the structure of claim 1, a foam provided along the inner surface of the storage recess, wherein the storage article and the foam are arranged in the impact direction. The contact surface is small and the compression strength of the foam is 0.05-0.45Kg on the inner or bottom surface.
/ Cm2 or density is 0.025 to 0.1 g / cm3, and the compressive strength of the foam is 0.02 to 0.07 Kg / cm2 or density is 0.015 to the inner surface or the bottom surface having a large contact surface. It is characterized by being set to 0.03 g / cm 3.

According to the third aspect of the present invention, in the storage case according to the first aspect of the present invention, the compression strength of the foam attached to the inner surface of the storage recess is 0.05 to 0.4.
It is characterized in that it is 5 Kg / cm ² and the compressive strength of the foam attached to the bottom surface is 0.02 to 0.07 Kg / cm ² .

In the storage case according to the present invention, as described in claim 4, in the structure of claim 1, the density of the foam attached to the inner side surface of the storage recess is 0.025 to 0.1 g.
/ Cm ³ and the density of the foam attached to the bottom is 0.01
It is characterized by being set to 5 to 0.03 g / cm ³ .

As described in claim 5, the storage case according to the present invention has the structure of claim 1, 2, 3 or 4, in which a foam is attached so as to cover the entire surface inside the storage recess. It is a feature.

According to a sixth aspect of the present invention, in the storage case according to the first, second, third, fourth or fifth aspect, the storage case is made of plastic so as to contact the foamed body. It is characterized by having a tray.

Further, as described in claim 7, the storage case according to the present invention has the structure of claim 1, 2, 3, 4, 5 or 7 in which the inner wall and the outer wall of the hollow double wall structure are provided. It is characterized in that a concave rib formed by projecting toward the outer wall and welding the projecting end portion to the outer wall is formed.

[0013]

1 is an overall perspective view showing an embodiment of a storage case according to the present invention, FIG. 2 is a front view of the storage case of FIG. 1 in an open state, and FIG. 3 is A of FIG. 3 is a perspective view cut along the line A, FIG. 4 is a perspective view corresponding to FIG. 3, except for the foam, and FIG. 5 is another embodiment of the storage case according to the present invention. It is a perspective view shown corresponding to.

1 to 4, a storage case 1 is shown.
Is made of plastic and includes a main body 2 and a lid body 3, and can be opened and closed by a hinge 4. The main body 2 has a hollow double-walled structure, and a storage recess 5 for storing stored items is formed inside the main body 2. The lid body 2 also has a hollow double-wall structure, and a storage recess 6 for storing stored articles is formed therein. 7
Is a hollow part.

The housing recess 5 of the main body 2 has a substantially rectangular concave shape, and the inner surface of the housing recess 5 is partially compressed and the other parts thereof, that is, the inner side surface 5a and the bottom surface 5b are respectively compressed. Foams 8 and 9 having different strengths or densities are additionally provided. That is, the foam 8 attached to the inner side surface 5a of the storage recess 5 has a compressive strength of 0.05 to 0.45 Kg /
cm ^2, and foam 9 which is additionally provided on the bottom surface 5b is intended that compressive strength is 0.02~0.07Kg / cm ^2, also foam was additionally provided on the inner surface 5a of the housing recess 5 8 has a density of 0.025 to 0.1 g / cm ³ , and the foam attached to the bottom surface 5b has a density of 0.01.
5 to 0.03 g / cm ³ . The compressive strength or density of the foams 8 and 9 is selected from the specific value within the above range or a value within a further narrowed range.

Here, the compressive strength is a value obtained by dividing a load at a specified strain value by an original cross-sectional area in a material which is not broken by compression, and is a maximum load required when 25% of the initial thickness is compressed. This is the calculated value.
In the present invention, the compressive strength of the foam is 50 × 300 for the test piece.
It is determined by the value obtained by measuring the load value at 25% compression of the original thickness of × 300 (mm) using a pressure disc of 200φ and dividing by the original cross-sectional area.

Inner side surface 5a and bottom surface 5b of the storage recess 5
The foams 8 and 9 attached to the above may be closely fitted to each other so that the foams 8 and 9 are not peeled off from the attachment surface, but in order to maintain a more stable state, the foams 8 and 9 It is advisable to provide a joining means such as adhering or adhering 9 to the inner side surfaces 5a and 5b of the storage recess 5.

As described above, on the inner surface of the storage recess 5,
Since the foam body 8 attached to the inner side surface 5a is relatively hard and the foam body 9 attached to the bottom surface 5b is relatively soft, the storage recess 5 is a foam body of the bottom surface 5b with respect to the stored article. 9 has a required cushioning property, and the foam 8 on the inner side surface 5a has a high immovable holding property. Therefore, even if the stored article is relatively large or has a relatively large weight, excellent protection is ensured, and a large load per unit area due to dropping from the side surface of the storage case 1 is involved. Good cushioning against shock.

Although not shown, if a concave rib is formed on the inner wall of the hollow double-wall structure forming the storage case 1 by projecting toward the outer wall and welding the projecting end portion to the outer wall, storage The strength and rigidity of the case 1 itself can be greatly improved. In this case, the concave rib is the storage recess 5
It is preferable to provide it.

The foam 8 attached to the inner side surface 5a of the storage recess 5 has the same compressive strength or density on the entire surface, and the compressive strength or density may be different for each surface. The bottom surface 5b may also have different compressive strength or density for each part.

In another embodiment of the present invention shown in FIG. 5, a plastic tray 10 is provided in the storage recess 5 so as to contact the foam bodies 8 and 9. This tray 10
A relatively soft, thin-walled material is preferable because it does not reduce the cushioning property and the immovable holding property of the foamed articles 8 and 9 having different compressive strengths or densities with respect to the stored article. Then, since the foams 8 and 9 are covered with the tray 10 in the storage recess 5, the inside of the storage recess 5 becomes a smooth surface, so that the surface protection against the stored articles is improved and the foam is further damaged. Can be prevented and the appearance is improved.

In the present invention, the thermoplastic resin constituting the storage case 1 is a polyolefin resin (polyethylene resin, polypropylene resin, etc.), polyamide resin (nylon, etc.), polyester resin (polyethylene terephthalate, polybutylene terephthalate, etc.). ),
Styrene resin (ABS resin, AS resin, etc.), engineering plastic (polycarbonate resin, modified polyphenylene resin, etc.), etc., or two of them
The above blends are blends of these and fillers (carbon fiber, calcium carbonate, talc, mica, etc.), and polyolefin thermoplastic elastomers.

Further, in the present invention, the foams 8 and 9 are foamed of polyethylene, polypropylene, polystyrene and polyurethane, and the inner surface 5 of the storage recess 5 is formed.
It is preformed so as to correspond to a and the bottom surface 5b.

Considering recycling at the time of disposal,
It is preferable that the thermoplastic material and the foam bodies 8 and 9 that form the storage case 1 are made of the same material.

The storage case 1 according to the present invention has a storage recess 5 which requires a particularly shock absorbing property, and comprises a foam body 8,
9 is provided on at least one of the main body 2 and the lid 3,
In particular, it is preferable to provide the main body 2 or both the main body 2 and the lid body 3. The storage case 1 according to the present invention is
As in the illustrated embodiment, the hollow double-wall structure is not limited to the one in which the integral storage recess is formed, and a container called a container configured by a plurality of plate bodies having a hollow double-wall structure may be used. It also includes.

[0026]

According to the present invention, foams having different compressive strengths or densities are additionally provided in a part of the inner surface of the storage recess and in other parts thereof. It is possible to provide a storage case having excellent cushioning properties and high immobility holding properties and excellent protection of stored items.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a storage case according to the present invention.

FIG. 2 is a front view showing the storage case of FIG. 1 in an open state.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a perspective view corresponding to FIG. 3, but without a foam.

FIG. 5 is a perspective view showing another embodiment of the storage case according to the present invention, corresponding to FIG.

[Explanation of symbols]

1 storage case 2 body 3 lid 4 hinges 5 storage recess 5a inner surface 5b bottom 6 storage recess 7 hollow 8,9 foam 10 trays

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 3E066 AA02 BA02 CA01 CB02 DA01                       DB01 EA01 FA13 HA03 JA01                       KA20 MA01 MA09 NA42                 3E096 AA01 AA11 BA21 BA30 CA02                       CB03 DA04 DA23 DA25 DB06                       DC04 EA02X EA03Y FA09                       GA11                 4F100 AK01A AK01C AK03 AK12                       AK41 AK46 AK51 BA04 BA07                       BA10A BA10D DC21B DD21B                       DJ01D GB16 JA13D JK05D                       YY00D

Claims (7)

[Claims] 1. A hollow double-wall structure comprising a main body and a lid, at least one of which has an outer wall and an inner wall facing each other and a hollow portion therebetween, wherein the inner wall of the hollow double-wall structure is In a plastic storage case formed by forming one or a plurality of storage recesses, a part of the inner side surface and the bottom surface of the storage recess and a foamed body having different compressive strengths or densities are attached to other parts respectively. A storage case to do. 2. A foam body attached to the inner surface of a housing recess, wherein the foam body has a compressive strength of 0.05 to 0. 45Kg / cm2 or density 0.02
The compressive strength of the foam is 0.02 to 0.
07Kg / cm2 or density 0.015-0.03g
The storage case according to claim 1, wherein the storage case has a size of / cm3. 3. The compression strength of the foam attached to the inner surface of the storage recess is 0.05 to 0.45 Kg / cm ^2, and the compression strength of the foam attached to the bottom is 0.02 to 0.07 Kg.
The storage case according to claim 1, wherein the storage case has a size of / cm ² . 4. The density of the foam attached to the inner surface of the storage recess is 0.025 to 0.1 g / cm ^3, and the density of the foam attached to the bottom is 0.015 to 0.03 g / cm 3. The storage case according to claim 1, wherein the storage case is ^three . 5. The foam is attached so as to cover the entire surface of the inside of the storage recess.
The described storage case. 6. The storage case according to claim 1, wherein a plastic tray is provided in the storage recess so as to contact the foam. 7. A hollow rib having a hollow double wall structure, wherein a concave rib formed by protruding toward an outer wall and welding a protruding end portion to the outer wall is formed. Storage case described in 4, 5, or 6.