JP4092089B2 - Foamed synthetic resin packaging container - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a synthetic resin packaging container, and more particularly to a foamed synthetic resin packaging container that is excellent in heat insulation and cold insulation and can be kept cold for a long time.
[0002]
[Prior art]
In recent years, foamed synthetic resin containers are widely used as packaging containers for fresh foods such as seafood that require freezing or refrigeration because they are lightweight, hygienic, and excellent in heat insulation.
[0003]
The foamed synthetic resin packaging container is made of foamed synthetic resin such as foamed styrene in a box shape and is a thick walled container to ensure strength or heat insulation. Housed and used for transportation and storage.
[0004]
Such a foamed synthetic resin packaging container is an excellent cold storage container having low thermal conductivity. However, the synthetic resin forming the foam is usually transparent. There was a problem that the transmission of the wire was large and heat entered from the outside, impairing the cold insulation.
[0005]
For the purpose of solving such problems, a heat-insulated material is wrapped in a colored inner bag so as to improve heat insulation by blocking the movement of heat due to radiation, and this is then wrapped in a synthetic resin packaging container. Has been proposed (Japanese Patent Laid-Open No. 11-245974).
[0006]
As shown in FIG. 5, these inner bags 11 are mounted in the box 2 by a box maker, and the upper part of the inner bag 11 is folded outward from the box 2 to cover the outside of the box 2. Are shipped together. However, when the upper part of the inner bag 11 is folded back to the outer side of the box 2 to cover the box 2, the inner bag is moved when the box 2 is moved by the conveyor in transporting the box, filling the cold storage, etc. There was a possibility that 11 touched a surrounding fixed object and was caught, and the box 2 dropped.
[0007]
For this reason, there is a demand for a foamed synthetic resin packaging container with an inner bag that does not get caught in the surroundings and is beautifully organized.
[0008]
[Problems to be solved by the invention]
The present invention provides a packaging container made of a foamed synthetic resin that does not cause the inner bag to be caught around during movement by a conveyor, is excellent in heat insulation and cold insulation, and can be kept cold for a long period of time. .
[0009]
[Means for Solving the Problems]
The present invention has been made as a result of intensive studies to achieve such an object, and is a synthetic resin mounted on the upper surface of at least two opposing side walls of the box formed of foamed synthetic resin. A groove for inserting and holding the upper part of the inner bag is formed along the length direction of the side wall, and at least one end of the groove opens from the upper surface of the side wall to the side of the box. it is intended to provide a foamed synthetic resin packaging containers, characterized in that.
[0010]
Further, according to the present invention, the above-mentioned foamed synthetic resin packaging container, in which the groove on the upper surface of the side wall is perforated over a part of the side wall or the entire length in the length direction , both ends of the groove are inserted into the groove. The above-mentioned foamed synthetic resin packaging container, which is narrower than the central part of the groove so as to hold the inner bag elastically, the groove on the upper surface of the side wall is perforated over the entire circumference of the side wall A foamed synthetic resin packaging container is provided.
[0011]
Furthermore, the present invention provides the above-mentioned synthetic resin packaging container whose box is made of expanded polystyrene .
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The foamed synthetic resin packaging container 1 of the present invention is formed of a thick synthetic resin foam. As the synthetic resin forming the foamed synthetic resin packaging container, foamed polystyrene, foamed polyethylene, foamed polypropylene, rigid foamed urethane resin, or the like can be used. Of these, expanded polystyrene is preferable.
[0013]
As shown in FIG. 1, the packaging container 1 is a combination of a box 2 formed in a box shape with a thick side wall 3 and a bottom plate 4 and a lid 5 formed in a shape coupled to the box 2. Usually, it is used in combination with the lid 5.
[0014]
It is desirable that the lid 5 has a fitting structure so as to be coupled to the box 2, and in order to prevent lateral shift and stabilize the packaging container 1 when stacked and transported, FIG. 4 (A) , (B), it is preferable that the upper edge of the side wall 3 of the box 2 and the lid 5 are formed so that the back surface of the bottom plate 4 of the lid 5 and the upper box 2b has a fitting structure. .
[0015]
The foamed synthetic resin packaging container 1 of the present invention is characterized in that a groove 7 is formed on the upper surface 6 of the side wall 3 of the box 2. The groove 7 is for inserting and holding the upper part of the inner bag, which will be described later, and is formed in the length direction of the side walls 3a, 3b at least on the upper surfaces 6a, 6b of the two side walls 3a, 3b facing each other. The The groove 7 can also be provided on the entire circumference of the box 2, that is, on all four sides.
[0016]
In this case, the groove 7 is generally formed over the entire length of the side walls 3a and 3b, but may be formed partially at both ends of the side walls 3a and 3b depending on the purpose. .
[0017]
When the groove 7 is formed over the entire length of the side walls 3a and 3b, the inner bag is elastically formed by narrowing the both end portions 7c and 7d of the groove 7 slightly narrower than the central portion 7e of the groove 7. It can be kept difficult to pull out, and the inner bag can be easily inserted.
[0018]
An inner bag 11 is mounted inside the packaging container 1. The inner bag 11 is made of a flexible synthetic resin, such as a high pressure method low density polyethylene, linear low density polyethylene, a polyolefin film such as ethylene / vinyl acetate copolymer, polypropylene, or vinyl chloride, polyester, polyamide, or the like. It can be formed using a film.
[0019]
The inner bag 11 is preferably subjected to a process for blocking the transmission of radiation, and as a process for blocking the transmission of radiation, a powder of a radiation-reflective material that reflects radiation, particularly infrared rays and near infrared rays. Can be carried out by kneading into a synthetic resin. As the powder of the radiation reflecting material, metal powder such as aluminum, iron and copper, and oxide powder of metal such as titanium oxide and zinc oxide can be used.
[0020]
The addition amount of the radiation reflecting substance can be arbitrarily selected according to the purpose, but is generally about 1 to 30% by weight, preferably about 3 to 20% by weight.
[0021]
In addition, a composite film in which a radiation reflecting material such as aluminum is laminated on a film made of a synthetic resin can be used. As a method of laminating the radiation reflecting material, a method of sticking a synthetic resin film on a metal foil Alternatively, it can be performed by vapor deposition by vacuum vapor deposition or sputtering. Among these, a synthetic resin film obtained by evaporating aluminum is preferable.
[0022]
The inner bag 11 accommodates the cold insulation material 12 and is loaded into the box 2. As shown in FIG. 2, after the cold insulation material 12 is accommodated in the inner bag 11, the upper portion of the inner bag 11 is folded. Thus, it is used so as to cover the cold insulator 12. Accordingly, the inner bag 11 is formed so as to be flexible and has a depth greater than the depth of the box 2, preferably about 1.5 to 3 times the depth of the box 2. Is used.
[0023]
When shipping the foamed synthetic resin packaging container 1 of the present invention, the inner bag 11 is loaded inside the box 2 and the lower part of the inner bag 11 is placed along the inner wall of the box 2. As shown in FIG. 3, the upper portion of the inner bag 11 is folded and bundled in the vertical direction, and the bundled portion of the inner bag 11 is inserted into the groove 7 while holding the length of the side wall 3 and being pulled in the lateral direction. The inner bag 11 is elastically held in the groove 7, and as a result, the inner bag 11 does not protrude from the outside of the box 2, and it is possible to eliminate the possibility that the inner bag 11 may be caught by surrounding objects during movement by the conveyor.
[0024]
The packaging container 1 made of foamed synthetic resin of the present invention can be used for storing and transporting items that require cold storage such as fresh food such as seafood, vegetables, etc. Especially, there is uneven cooling of salmon, sword fish, salmon, salmon, etc. Suitable for storing and transporting fish to be avoided.
[0025]
When the foamed synthetic resin packaging container 1 of the present invention is used, after putting the cold insulation material 12 together with ice in the inner bag 11, the upper portion of the inner bag 11 is folded to cover the cold insulation material, and the lid 5 is placed thereon. Packaging can be performed by covering.
[0026]
【The invention's effect】
According to the present invention, since the radiation transmitted through the box or lid made of the synthetic foam resin is blocked by the inner bag, it is excellent in cold insulation and can be kept for a long period of time. Since it is held by the side wall, it is easy to handle, and a practical foamed synthetic resin packaging container that does not get caught by surrounding objects during movement by the conveyor can be obtained.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of a case of a foamed synthetic resin packaging container according to the present invention. FIG. 2 is a longitudinal sectional view showing an example of use of a foamed synthetic resin packaging container. FIG. 4 is a longitudinal sectional view showing a fitting structure of a box and a lid. FIG. 5 is a perspective view showing attachment of a conventional inner bag.
1: foamed synthetic resin packaging container 2: box 3: side wall 4: bottom plate 5: lid body 6: upper surface 7: groove 11: inner bag 12: cold insulation

Claims (5)

The upper surface of the two side walls at least opposite of a box body formed of a foamed synthetic resin, long groove for holding crowded difference an upper portion of the synthetic resin inner bag to be attached to該函body is of the side wall The foamed synthetic resin packaging container is formed along a direction, and at least one end of the groove is open from an upper surface of the side wall to a side of the box . 2. The foamed synthetic resin packaging container according to claim 1, wherein the groove on the upper surface of the side wall is perforated over a part of the side wall or the entire length in the length direction . The foamed synthetic resin packaging container according to claim 2, wherein both ends of the groove are narrower than the central part of the groove so as to elastically hold the inner bag inserted into the groove . 2. The foamed synthetic resin packaging container according to claim 1, wherein a groove on the upper surface of the side wall is formed through the entire circumference of the side wall. The synthetic resin packaging container according to any one of claims 1 to 4 , wherein the box is made of expanded polystyrene.

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