JPH0314479A - Package - Google Patents

Abstract

PURPOSE:To securely and inexpensively protect fragile contents, such as glass or plastic products and cartridges for a copy machine for example, so as to resist against shock due to vibration and dropping by providing ribs for preventing external shock from directly transmitting to the contents and keeping the contents on the inner face of a cylinder. CONSTITUTION:A package comprises a cylindrical body 1 wherein plastic is injection-molded, and the cylindrical body is approximately rectangular in cross section and provided with a plurality of ribs 2 on the inner face. The outer shell of the cylindrical body 1 aims at protecting contents 3 entirely while the ribs 2 provided on its inner face function to elastically hold the contents 3 inside the cylindrical body 1. When shock is applied from the exterior to the package, the shock is first applied to the cylindrical body 1. The applied shock is transmitted to the contents 3 via the ribs 2 which are soft and have cushion property. As a result most of the shock is absorbed and buffered by the ribs 2, thereby well protecting the contents against shock.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is applied to packaging containers, and more specifically, to protect articles (contents) that are easily damaged by shocks such as vibrations and drops during handling during transportation. Regarding packaging containers suitable for (Prior art and its problems) Conventionally, methods for protecting contents that are easily damaged during transportation include the use of paper (particularly cardboard), foam sheets, and resin foam moldings such as foamed polystyrene and foamed polyurethane. Various methods have been proposed.

However, protection with a cardboard box only works if the contents are exactly the same size as the box, but if the contents are uneven or have protrusions, they may be subject to localized stress due to vibration or impact when dropped. In addition, there is a problem that not only the packaging is damaged but also the contents are easily damaged.

Furthermore, if the dimensions of the cardboard box and the contents are not exactly the same, the contents will dance inside the box, which is not desirable in terms of protecting the contents. These cardboards originally do not have much elasticity as paper themselves, and have the above-mentioned problems, and are not very cheap.

It is also generally well known to protect items by wrapping them with foam sheets or sheets with air bubbles (product name: Air Pack). However, this method involves wrapping a sheet around the contents;
Fix the sheet with tape, etc., and further pack it,
It is placed in a cardboard box, etc., and provides better results in terms of protecting the contents than a cardboard box alone. However, as mentioned above, packaging is very time-consuming and costly, and wrapping it with foam sheets, etc. The wall thickness increases the size, which is undesirable because it increases the cost of the cardboard and increases the transportation and warehouse space.

Further, in this case as well, it cannot be said that the protection of the contents is sufficient if the contents are uneven or have protrusions, such as the above-mentioned cardboard box.

In addition, as a method of protecting contents that are easily damaged, a method using a foamed resin molded product is commonly used. However, foamed polyurethane is expensive and not common. In addition, styrofoam molded products can be made to match the shape of the contents, and have good cushioning properties.
Suitable for protecting contents.

However, packaging containers with commonly used foaming ratios require a wall thickness of more than 10 mm or more in order to protect the contents and provide strength. This requires two or three times as much volume, creating a huge burden in terms of logistics costs such as warehouse space.

In addition, the material is easy to tear, and the cost is not cheap.
In 11Q, it is common to attach a cylindrical cardboard sheet on top of the styrofoam case, or to use the styrofoam case inside a cardboard box, which increases the cost of the packaging itself.

Therefore, an object of the present invention is to solve the conventional problems as described above, to reliably and inexpensively protect contents that are easily damaged, such as glass, plastic products, cartridges for copying machines, etc., and to protect them from vibrations. The objective is to provide a packaging container that can withstand shocks caused by dropping or dropping. Another object of the present invention is to be formed to match the shape of the contents so that the contents can be held and fixed within the container with good cushioning properties without creating an extra space between the contents and the packaging container. At the same time, it is an object of the present invention to provide a packaging container that is space-saving, saves warehouse space and distribution space, and significantly reduces storage and distribution costs.

(Means for solving problems) The above objects are achieved by the present invention as described below.

That is, the present invention provides a packaging container that protects the contents,
The container body is an extruded resin cylinder, and the inner surface of the cylinder is provided with ribs that prevent external shocks from being directly transmitted to the contents and hold the contents. This is a unique packaging container.

(for production) This will be explained with reference to the drawings.

FIG. 1 is a perspective view of the packaging container of the present invention, and FIG. 2 is a sectional view taken along the line AA'.

As shown in FIGS. 1 and 2, the packaging container of the present invention consists of a cylindrical body 1 made of extruded resin. is formed.

The outer shell of the cylinder 1 has the purpose of protecting the contents 3 as a whole, and the ribs 2 provided on the inner surface protect the contents 3 from the cylinder.
It has the function of elastically holding and fixing the inside. That is, reply 2
By supporting the contents 3, the contents 3 are prevented from dancing inside the cylinder.

Furthermore, when a shock is applied to the package from the outside, the shock is first applied to the cylindrical body l, and the applied shock is transmitted to the contents 3 via the flexible and cushioned ribs 2, resulting in the impact being reduced. Most of the content is absorbed and relaxed by the ribs 2, and the contents 3 are well protected from impact.

(Preferred embodiments) Next, the present invention will be described in more detail by citing preferred embodiments.

It goes without saying that the cylindrical body L must not be damaged by drop impact etc. as it is originally intended as a packaging material, and there are naturally limitations on the materials that can be used as the cylindrical body L. Due to cost considerations, vinyl chloride resin, polypropylene, polyethylene terephthalate, polyethylene, ABSr4 resin, high impact polystyrene, etc. are generally used.

Further, although the cylinder 1 is shown to have a cylindrical shape with a substantially rectangular cross section, its length and diameter are not particularly limited, and as much as possible, extra space should be avoided between the contents 3 and the cylinder 1. Similarly, the shape may be approximately similar to the shape of the contents 3 to be packed, and it can be molded into a desired shape by extrusion molding. Furthermore, although a portion of each corner is formed in a circular shape, the shape is not particularly limited to this, and it may have a ridgeline like a general box.

The wall thickness of this cylindrical body l depends on the material, but is desirably 2 mm or less, more preferably 1 mm or less, and even more preferably 0.
．． It is 8 mm or less. On the other hand, if the wall thickness is too thin, the effect will be reduced and processing will be difficult, so the thickness should be 0.4 mm or more, more preferably 0.4 mm or more. The wall thickness should be 5 mm or more. In addition, in order to provide sufficient strength to the entire cylindrical body 1, in addition to increasing the wall thickness, it is also effective to provide reinforcement shapes such as approximately triangular shapes at the four corners during extrusion molding, or to create a structure with other ribs erected. This is a great method. Two ribs 2 are provided on each side of the inner surface of the cylinder 1, but the number of ribs is not particularly limited as long as the contents 3 are held well. Further, the rib 2 has a curved surface portion extending from the inner surface as shown in the figure, and the curved surface portion contacts the contents 3 and presses the contents 3 with the elasticity of the rib 2.
It is preferable to hold the contents 3, and the shape is not particularly limited as long as it has such a function, but in order to elastically hold the contents, the thickness of the ribs 2 protruding inward should be 10 mm or more. , the curved surface has an R of 3R or more and an R of 90 degrees or more
It is preferable to have a section. The ribs 2 may be molded separately from the cylinder and fixed to the inner surface of the cylinder 1, but it is most desirable in terms of cost to mold them at the same time as the cylinder 1 is extruded. It does not have to be the same as the molding material for the body 1; materials with high elasticity such as soft vinyl chloride resin, polyurethane elastomer, etc. are also useful. Further, the shape, weight, etc. of the contents 3 to be packed are not particularly limited, but it is desirable that the weight of the contents 3 is 5 kg or less, preferably 3 kg or less. If the weight of the contents 3 becomes too heavy, the wall thickness of the cylindrical body 1 must be increased, which increases the cost. On the other hand, when the wall thickness increases, the rigidity of the cylindrical body 1 increases, the cushioning properties decrease, and the protection of the contents 3 becomes insufficient. If the ribs 2 are made thicker in order to prevent this, the cost will also increase in this respect. Therefore, the packaging container of the present invention is suitable for packaging relatively lightweight items.

Further, in a preferred embodiment of the present invention, side plates 4 are prepared which are applied to both ends of the cylindrical body l. This side plate 4 may be a flat plate that simply contacts the end of the cylindrical body 1. Of course, it is preferable that the side plate 4 be configured to be able to be fitted to both ends of the cylindrical body 1 by known means. The side plate 4 may be a cardboard side plate if the contents 3 are strong against impact such as falling from the direction of the side plate 4, but otherwise,
Styrofoam molded products, extrusion molded products, vacuum molded products, etc. can be used. Among these, the use of vacuum-formed products is particularly effective in terms of cost reduction. In this case, the vacuum-formed product is such that the part that receives the impact directly when the item 3 falls does not come into contact with the item 3, and the part that comes into contact with the item 3 when it falls has cushioning properties, so that when the item 3 is dropped, It is preferable that the structure has a structure that softens the impact such as. Also, similar to the cylinder l,
Ribs or recesses may also be provided on the inner surface of the side plate 4. Furthermore, there are various methods of fixing the side plate 4, such as bonding with a band; however, the contents 3 are attached to the cylinder 1, the side plates 4 as described above are attached to both ends, and stretch film or other methods are available. A method of fixing with a shrink film or the like is preferred. According to such a method, it is possible not only to fix the film with less manpower and at low cost, but also to have a desirable appearance, and by printing on the film, it becomes possible to obtain a more desirable appearance as a product.

(Example) Next, the present invention will be explained in more detail by giving examples and comparative examples.

Example 1 A packaging container (cylindrical body 1) having the structure as shown in Fig. 1 was extruded,
After packing a cartridge for Canon LBP as the contents 3 in an aluminum bag, insert it into the cylinder l, and attach the vacuum-formed side plate 4.
was applied to both ends. This is wrapped in a printed shrink film, the shrink film is shrunk through a shrink tunnel, and the whole is wrapped.
were fixed to both ends of the cylindrical body 1.

At this time, the cylinder 1 is made of vinyl chloride resin, and its wall thickness is 0.
The height of the ribs 2 supporting the contents 3 was set to 10 mm. The vacuum-formed side plate 4 is made of vinyl chloride resin film (1 mm thick) and is designed to have a minimum thickness of 0.1 mm and an average thickness of 0.3 mm. It also has a recessed part to soften the impact transmitted to the contents 3.

The above-mentioned packaging samples were dropped onto a concrete floor from heights of 90 cm and 60 cm a total of 10 times from the 6th side, 3rd corner, and 1st corner. No damaging damage occurred. Moreover, the moisture resistance and appearance were also good.

Example 2 In Example 1, the aluminum bag was not used, and the side plate 4 was made of a stretch film with a 90 μm vinylidene chloride resin layer.
When fixed, good results were obtained as in Example 1.

Example 3 In Example 1, E cardboard was used as the side plate 4.

When a drop test was conducted in the same manner as in Example 1, the drop was 90 cm.
There was damage such as the shutter coming off at the height of 60.
A fall from a height of 1.5 cm caused no substantial damage.

Comparative Example 1 A process cartridge packed in an aluminum bag was directly placed in a B cardboard box, fixed with tape, and then dropped in the same manner as in Example 1. When tested on 6 sides, 3 sides, and 1 corner, the result was 40c.
Due to damage, it became difficult to use even from a height of m.

Comparative Example 2 When the same cartridge as in Example 1 was supported at both ends with styrofoam moldings, placed in a cardboard box, fixed with tape, and dropped, good results were obtained as in Example 1. The volume is 2.5 times that of Example 1, resulting in a significant cost increase in logistics costs, warehouse space, etc.

Comparative Example 3 The same cartridge as in Example 1 was packed in a polyethylene sheet (commonly known as an air pack) having air bubbles with a diameter of 4 mm.
When I fixed it with tape, put it in a cardboard box, fixed it with tape, and dropped it, it was functionally usable from a height of 40 cm, but there was damage such as some broken protrusions.

(Effects) According to the present invention as described above, a packaging container that can reliably and inexpensively protect contents that are easily damaged, such as glass, plastic products, cartridges for copying machines, etc., and can withstand shocks caused by vibrations and drops. can be provided.

Further, according to the present invention, the contents are held and fixed within the container with good cushioning properties without creating any extra space between the contents and the packaging container, and at the same time, space is saved, which saves warehouse space and logistics. It saves space and significantly reduces storage and logistics costs.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the packaging container of the present invention, and FIG. 2 is a sectional view taken along line AA'. l: Cylindrical body 2: Rib 3: Contents 4: Side plate

Claims (2)

[Claims] (1) In a packaging container that protects the contents, the container body is an extruded resin cylinder, and the inner surface of the cylinder has
A packaging container characterized by being provided with ribs that prevent external shocks from being directly transmitted to the contents and hold the contents. (2) The packaging container according to claim 1, which has side plates at both ends.