JPH0314477A - Package - Google Patents

Abstract

PURPOSE:To securely and inexpensively protect fragile contents so as to resist against shock due to vibration and dropping by a method wherein side parts of a cylinder have recesses for preventing external shock from directly propagating to the contents and maintaining the contents while a cushion layer is further provided on the inner face of said recess. CONSTITUTION:A package is a cylindrical body 1 wherein resin is injection molded, while the cylindrical body 1 is approximately rectangular in cross section, a recess 2 is provided on each side and a cushion layer 3 is provided on the inner face of said recess 2. An outer shell of the cylindrical body 1 aims at protecting contents 4 entirely while the recess 2 provided on each side functions to hold and fix the contents 4 inside the body 1. When shock is applied from the exterior to the package, the shock is first applied to parts other than the recesses 2, that is, respective corners being protrusions so that the applied shock is transmitted to the contents 4 via the recesses 2. As a result, the shock is absorbed and buffered on the way thereby well protecting the contents against shock.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a packaging container, and more specifically, it is suitable for protecting articles (contents) that are easily damaged by shocks such as vibrations and drops during handling such as transportation. Regarding packaging containers.

(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 1M resin foam moldings such as styrofoam and foam polyurethane. Various methods have been proposed.

However, with the protection provided by a cardboard box, if the contents are exactly the same as the size of the box, they will struggle, and if the contents are uneven or have protrusions, they will be subject to localized stress due to vibrations 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 undesirable 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 articles by wrapping them with foam sheets, sheets with air bubbles (trade name: Airbag), or the like.

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. Furthermore, molded products made of styrene foam can be made to match the shape of the contents, have good cushioning properties, and are suitable for protecting the contents.

However, the packaging container with the foaming ratio used for -1i1U requires a wall thickness of more than 10 mm or more in terms of protection and strength of the contents, so if this is used, it will not be possible to pack the cardboard alone. 2 to 3 times the volume is required,
This poses a significant burden in terms of logistics costs such as warehouse space. In addition, the material is easy to tear, and the cost is not cheap, so 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. However, the packaging itself is also costly.

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. An object of the present invention is to provide a packaging container that can withstand shocks caused by dropping or falling.

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 packaged container. The object of the present invention is 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 sides of the cylinder have i! i! This packaging container is characterized in that it has a recess that prevents J from directly transmitting to the contents and holds the contents, and further includes a cushion layer provided on the inner surface of the recess.

(for production) See the drawing! ] Q and explain.

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'.

As shown in FIGS. 1 and 2, the packaging container of the present invention consists of a cylindrical body 1 made of extruded resin, and the cylindrical body 1 has a substantially rectangular cross section and has recesses 2 on each side. A cushion layer 3 is provided on the inner surface of the recess 2.

The outer shell of the cylindrical body 1 has the purpose of protecting the contents 4 as a whole, and the recesses 2 provided on each side of the outer shell protect the contents 4 from the cylindrical body 1.
It has the function of holding and fixing inside.

That is, by holding the contents 4 between the recesses 2, the contents 4 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 parts other than the recess 2, that is, to the convex corners, so the applied impact passes through the recess 2 and damages the contents. As a result, the impact is absorbed and relaxed on the way, and the contents 4 are well protected from the impact.

In addition, as a result of the cushion layer 3 being provided on the inner surface of the recess 2, the contents 4 are firmly fixed due to its cushioning effect and will not shift.
As a result, the impact transmitted from the outside to the contents 4 is further absorbed and alleviated.

Moreover, since this cushion layer 3 is elastic and stretchable,
Even if the contents 4 have some size, the contents 4 can be well held and fixed within the cylinder l.

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

It goes without saying that the cylindrical body 1 must not be damaged by drop impact etc. because of its original purpose as a packaging material, and there are naturally limitations on the materials that can be used as the cylindrical body 1. Due to cost considerations, vinyl chloride resin, polypropylene, polyethylene terephthalate, polyethylene, ABS 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, unnecessary space should be created between the contents 4 and the cylinder 1. Similarly, the shape may be approximately similar to the shape of the contents 4 to be packed, and it can be molded into a desired shape by extrusion molding.

Further, although a portion of each corner is formed in a circular shape, the shape is not particularly limited to this, and may have a ridgeline like a general box. Further, the shape of the recesses 2 provided on each side is not limited to that shown in the drawings as long as they have the above-described functions.

Further, the shape of the cushion layer 3 provided on the inner surface of the recess 2 is not limited to the shape shown in the drawings as long as it performs the above-mentioned function. The cushion layer 3 may be provided by bonding together, but it is most desirable from the cost standpoint to provide it by co-extrusion molding into many stripes at the same time during extrusion molding, and the material is soft vinyl chloride resin, polyurethane elastomer, polyethylene. , polypropylene, foamed products thereof, etc. can be used.

Further, the shape, weight, etc. of the contents 4 to be packed are not particularly limited, but it is desirable that the weight of the contents 4 is 5 kg or less, preferably 3 kg or less. If the weight of the contents 4 becomes too heavy, the wall thickness of the cylindrical body 1 must be increased, which increases 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 4 becomes insufficient. If the cushion layer 3 is 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.

In the packaging container of the present invention, in order to provide sufficient strength to the entire cylindrical body, in addition to thickening the wall thickness, reinforcing shapes such as approximately triangular shapes are provided at the four corners during extrusion molding, and a ribbed structure is used. It is also an effective method to do so. In addition, in terms of ensuring cushioning properties, the recess 2 can be made into a curved shape different from the shape shown in the drawings, and its radius can be made large, for example, 3R, more preferably 5R or more. Of course, the shape of the recess 2 can be various shapes such as a trapezoid, a square, a circle, an ellipse, etc. It is also a preferable method to make the thickness of the concave portion 2 thinner than that of other portions (ie, the convex portion). That is, by making the recess 2 thinner, the recess 2 itself is given cushioning properties, and the impact transmitted to the contents 4 is further alleviated. The wall thickness of this recess 2 depends on the material used for the cylinder 1, but the thickness is 2.
The thickness is preferably 1 mm or less, more preferably 1 mm or less, and even more preferably 0.8 mm or less. On the other hand, if the recess 2 does not leak, the effect will be reduced and machining will be difficult, so 0.
The wall thickness is 4 mm or more, preferably 0.5 mm or more.

As described above, the cushion layer 3 is provided in the portion of the recess 2 that comes into contact with the contents 4 to provide further cushioning properties. In this case, the cushion layer 3 has a thickness of 0.5 mm to 5 m.
It is preferable to provide a thickness of m. If the cushion layer 3 is too thick, it is disadvantageous in terms of increased cost and size, and if it is thin, the effect is small.

Further, in a preferred embodiment of the present invention, side plates 5 are prepared which are applied to both ends of the cylindrical body l. This side plate 5 may be a flat plate that simply contacts the end of the cylindrical body 1. Of course, it is preferable that the side plate 5 be configured so that it can be fitted to both ends of the cylindrical body l by known means. The side plate 5 may be a cardboard side plate if the contents 4 are strong against impact such as falling from the direction of the side plate 5, but otherwise,
Styrofoam molded products, extrusion molded products, vacuum molded products, etc. can be used. Among these, it is particularly effective to use vacuum-formed products in terms of cost reduction. In this case, the vacuum-formed product is such that the part that receives the impact directly when the content 4 is dropped is not in contact with the content 4, and the part that comes into contact with the content 4 when it falls has cushioning properties, so that when the product is dropped, It is important to have a structure that cushions the impact of Further, like the cylinder 1, the side plate 5 may also be provided with a cushion layer.

Furthermore, there are various methods of fixing the side plate 5, such as adhesion and band binding. A method of fixing with a film or the like is preferred. According to such a method, not only can it be fixed at a low cost with less manpower, but the concave portion 2 also becomes less noticeable, giving it a desirable appearance, and by printing on the film, a more desirable appearance as a product can be obtained. It will be like that.

(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 configuration as shown in Fig. i was extruded,
After packing a cartridge for Canon LBP as the contents 4 in an aluminum bag, insert it into the cylinder 1, and attach the vacuum-formed surface measurement plate 5.
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 cylinder l.

At this time, the cylinder 1 is made of vinyl chloride resin, and its wall thickness is 0.
The depth of the recess 2 supporting the contents 4 was set to 5 mm. The cushion layer 3 was provided on the inner surface of the recess 2 by coextrusion of polyurethane foam to a thickness of 5 mm. The vacuum-formed side plate 5 is made of vinyl chloride resin film (1 mm thick).
Thickness), and the minimum thickness part is ○. lmm, average wall thickness 0
．． It was designed to have a diameter of 3 mm, and a recess was also provided in the center to soften the impact transmitted to the contents 4.

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, 3rd, and l-angle directions. No damaging damage occurred. In addition, the moisture resistance and appearance were good, and the aluminum bag was not damaged at all.

Example 2 In Example 1, the aluminum bag was not used, and the regular face plate 5 was made of a stretch film with a 90 μm vinylidene chloride resin layer.
was fixed, but good results were obtained similar to Example 1 except for the water resistance.

Example 3 In Example 1, E cardboard was used as the side plate 5.

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 70.
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 {.
It became difficult to use due to damage due to the 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 was 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 bag) 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.

Example 4 A foamed polyethylene sheet with a width of 1 mm is sandwiched between teacups, and the same cylindrical body 1 as in Example 1 is stacked and inserted, side plates 5 of B corrugated cardboard are fixed to both ends, and a shrink film is attached. After fixing it and carrying out a transportation test, there were no problems at all during two round trips between Tokyo and Osaka by truck and loading and unloading.

(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 cross-sectional view taken along line A-A. l: Cylinder 2: Recess 2 3: Cushion layer 4: Contents 4: Side plate

Claims (4)

[Claims] (1) In a packaging container that protects the contents, the container body is an extruded resin cylinder, and the sides of the cylinder include:
A packaging container characterized by having a recess for preventing external shocks from being directly transmitted to the contents and holding the contents, and further comprising a cushion layer provided on the inner surface of the recess. (2) The packaging container according to claim 1, wherein the thickness of the recessed portion is thinner than other portions. (3) The packaging container according to claim 1, which has side plates at both ends. (4) The packaging container according to claim 3, wherein a recess is also formed on the side plate.