JP5281299B2 - Foamed synthetic resin container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a container made of foamed synthetic resin, designed so that the upper edge of an inner bag is inserted into the grooves of the upper end of the side-wall formed along the length of the side-wall, the container having sufficient locking structure for the container and the bag, which includes a simple structure and involves no cost increase. <P>SOLUTION: The container 1 made of foamed synthetic resin includes a lid 3 and a box 2, and includes a fitting structure in which the lower side of the lid and the upper side of the box fit one on the other. The container is provided with the grooves 10 each of which almost obliquely crosses the upper end face of a part near a corner 8 where the adjacent long and short side-walls 4 and 5 intersect. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention uses an inner bag for heat insulation or hygiene purposes in the container, and the inner bag is scattered or detached by an external force such as wind before the contents are stored inside the container. The present invention relates to a useful foamed synthetic resin container that can effectively prevent the above.

  In recent years, foamed synthetic resin containers are lightweight, sanitary, and have excellent heat insulation, so they can be used for packaging fresh food such as fishery products such as seafood, fruits and vegetables that require freezing or refrigeration. Widely used as a container. Furthermore, for the purpose of improving the cold insulation, the heat transfer by radiation is blocked to improve the heat insulation, and then the colored or aluminum-deposited inner bag is wrapped in a cold insulation, and then foamed. A technique for accommodating in a synthetic resin packaging container has been proposed (see, for example, Patent Document 1).

  After the inner bag is loaded into the box by the box builder, either manually or by machine, at a high speed, the upper part of the inner bag is folded outward to cover the outside of the box. However, because there are no special locking points, the inner bag is easily detached or scattered by an external force such as wind, or the end of the inner bag during work or transportation There was a risk of the part getting caught and the box falling.

For this reason, a groove is formed on the upper surface of the side wall of the box along the length direction of the side wall, and the upper edge of the inner bag is inserted into the groove so that the inner bag is not caught around even during movement by the conveyor. A synthetic resin packaging container has been proposed (see Patent Document 2). Although the container can solve the problem that the inner bag is caught during work to some extent, the locking strength is low, so that the locking strength is further high, and an improvement in an effective locking method has been desired.
Japanese Patent Laid-Open No. 11-245974 JP 2002-362630 A

  The subject of this invention is providing the container which can prevent the inner bag previously loaded in the container made from a synthetic foam resin from coming off and scattering. Further, by providing an inner bag in this container, it is possible to prevent the outer wall of the container from being contaminated or wetted by scattering when the cold-reserved material is added.

  That is, the present invention has the following configuration.

1). A foamed synthetic resin container comprising a lid and a box, and having a fitting structure in which the lower surface of the lid and the upper surface of the box are engaged with each other,
A foamed synthetic resin container , characterized in that a groove portion that crosses in an oblique direction is provided on an upper end surface in the vicinity of a plurality of corner portions where two adjacent side walls intersect.

2). The foamed synthetic resin container according to 1) , wherein a groove is provided on the upper end surface in the vicinity of two corners on the diagonal line of the foamed synthetic resin container.

3). The foamed synthetic resin container as described in 1) or 2) , wherein a plurality of grooves each crossing in an oblique direction are provided on the upper end surface in the vicinity of a plurality of corners.

4). The foamed synthetic resin container according to 3) , wherein two grooves each extending in an oblique direction are provided on the upper end surface in the vicinity of the plurality of corners .

  5). The foamed synthetic resin container according to any one of 1) to 4), wherein the upper end surface in the vicinity of the corner of the foamed synthetic resin container includes the upper end surface of the side wall top part and / or the upper end face of the fitting convex part.

  The present invention increases the number of locking points between the container and the inner bag and increases the locking strength in order to prevent the operation of the inner bag from being scattered or detached from the container due to external forces such as wind. It is possible to increase the height, and despite the fact that the mechanized high-speed locking operation is easy, an extremely excellent locking effect is realized. And the good foam synthetic resin container which does not inhibit a moldability, heat insulation, and cold insulation property is provided.

  The foamed synthetic resin container of the present invention is formed of a synthetic resin foam. As a synthetic resin for forming a foamed synthetic resin packaging container, a foamed polystyrene resin, a foamed polyethylene resin, a foamed polyolefin resin such as a foamed polypropylene resin, a rigid foamed urethane resin, or the like can be used. Is preferred.

  The foamed synthetic resin container of the present invention is composed of a lid and a box, and the joint between the lid and the box has a fitting structure such as fitting irregularities to be fitted to each other, This is a foamed synthetic resin container that is designed not to be easily opened when the lid is closed, and has a structure that enhances the heat retaining effect such as cold retaining property and heat retaining property. Many containers have a fitting projection on the box side and a fitting depression on the lid side in many cases.

  In the present invention, the upper end surface near the corner of the container where two adjacent side walls intersect each other is formed with a groove portion provided substantially obliquely so as to cross the long side wall and the short side wall, and the inner bag is formed in the groove portion. Insert near the top and lock. Thus, by providing the groove part which crosses substantially diagonally, since the inner bag can be locked in two directions at one groove part, the locking effect is high. Here, “substantially oblique” means substantially oblique with respect to the longitudinal axis of the side wall. Similarly, it means substantially oblique with respect to the longitudinal axis of the other side wall.

In the best embodiment, it refers to 45 degrees relative to the longitudinal axis of the long sidewall. Furthermore, since the groove is formed in the vicinity of the corner of the container where the long side wall and the short side wall intersect, it may be provided in the vicinity of the two corners on the diagonal, but particularly preferably, the entire corner of the container Providing in the vicinity is preferable because a good locking effect can be obtained. Furthermore, it is more preferable that the locking strength can be improved by providing a plurality of substantially oblique groove portions, particularly preferably two or more substantially in parallel with each other. For example, if a groove is provided in every corner every two strips, a locking effect can be provided at eight locations, and the locking strength is extremely excellent.
In the present invention, the expression of the upper end surface near the corner is used, and the meaning is as follows.

  That is, the upper end surface in the vicinity of the corner includes the upper end surface of the side wall top, and further includes a fitting structure provided on the top of the side wall, for example, the upper end surface of the fitting convex portion protruding from the upper end surface of the side wall top. It is. Therefore, it is also possible to form a groove portion substantially obliquely so as to cross the long side wall and the short side wall only on the upper end surface of the side wall near the corner of the container where the adjacent long side wall and the short side wall intersect. And it is also possible to form only the upper end surface of the side wall fitting convex part in the corner vicinity of the container where the adjacent long side wall and the short side wall intersect. Furthermore, it can be formed on either the upper end surface of the side wall top portion or the upper end surface of the side wall fitting convex portion.

  The width of the groove is difficult to define because the size of the container, the expansion ratio, the side wall thickness, the width and the height of the fitting convex part, and the like differ depending on the container. -10 mm is preferable, More preferably, it is 0.3-5 mm. Since the length of the groove portion is also different from the size of the container and the like, it is generally difficult to define, but is preferably 10 to 200 mm, more preferably 20 to 150 mm, and most preferably 25 to 100 mm. In the present invention, the length of the groove portion is regarded as a continuous continuous groove portion in the same straight line when the groove portion is discontinuous, and is the length between the extreme end and the extreme end of the other end. Say.

  The depth of the groove part is also difficult to define because the size of the container is different, but is preferably 1 to 50 mm, and more preferably 2 to 25 mm. The cross-sectional shape of the groove portion is most preferably a wedge shape with a narrower width toward the lower portion, but is not limited thereto, and the upper portion of the inner bag is inserted even in a U-shaped or other general shape groove, or Any shape can be used.

  When the upper portion of the inner bag is inserted into the groove, a substantially oblique groove portion is provided at the corner portion, so that the locking strength is increased, and when the upper end of the inner bag is folded back so as to sufficiently cover the outside of the side wall, It is also possible to efficiently prevent contamination or wetting on the outside of the side wall when housed inside.

  Hereinafter, the present invention will be described with reference to the drawings. FIG. 1 shows an embodiment of the present invention, which is a perspective view showing the entire box 2 and lid 3 of a foamed synthetic resin container 1. The box 2 of the foamed synthetic resin container 1 is formed in a rectangular shape by two long side walls 4 (4a, 4b), a short side wall 5 (5a, 5b) and a bottom 6 as two side walls.

  On the upper surfaces of the side walls 4 and 5 of the box 2, there are fitting irregularities as an example of a fitting structure that fits with the lower surface of the lid 3. The fitting shape is not particularly limited, and a known shape can be used. For example, in FIG. 1, the example which provided the fitting convex part 7 of uneven | corrugated fitting on the upper surface of the side walls 4 and 5 is shown. A fitting recess that fits into the fitting projection 7 is provided on the lower surface of the lid 3, but is omitted in the drawing. Or a fitting convex part and a fitting recessed part can also be provided in the lower surface of the cover body 3, and the upper surface of the side walls 4 and 5, respectively.

  Either one of the upper surface of the side walls 4 and 5 of the box 2 or the lower surface of the lid 3 may be provided with either a fitting recess or a fitting projection, and the other may not be provided with a fitting unevenness. Is possible. Moreover, although these fitting uneven | corrugated | grooved parts may be continuous or discontinuous, it is preferable to provide the circumference continuously.

  The upper end surface 9 in the vicinity of the corner 8a where the adjacent long side wall 4a and the short side wall 5a intersect each other is composed of the side wall top upper end surface 9a and the upper end surface 9b of the fitting convex portion. Another corner 8b where the adjacent long side wall 4b and the short side wall 5a intersect, similarly a corner 8c where the long side wall 4b and the short side wall 5b intersect, and similarly a corner where the long side wall 4a and the short side wall 5b intersect. Part 8d exists. When the corner is expressed comprehensively, it is simply expressed as the corner 8. A groove 10 is provided that substantially obliquely crosses the vicinity of the corner 8. The groove portions 10 are provided at four corner portions 8 in FIG. 1, and are represented as a groove portion 10a near the corner portion 8a, a groove portion 10b near the corner portion 8b, a groove portion 10c near the corner portion 8c, and a groove portion 10d near the corner portion 8d. Wow.

In FIG. 1, two grooves 10 are provided in the vicinity of the corner 8. These are preferably substantially parallel to each other. FIG. 2 shows a groove portion 10-1 provided on the upper end surface 9b of the fitting convex portion and a groove portion 10-2 provided on the side wall top upper end surface 9a. The groove portion 10-1 provided on the upper end surface 9b of the fitting convex portion in the vicinity of the corner portion 8 has an advantage in that the position of the groove can be selected considerably freely since there is a margin in the provided portion. On the other hand, since the limited groove _10-2 area of the corner portion 8 near the side wall top portion upper end surface 9a, it becomes difficult provided tendency long groove.

  In addition, since the groove part 10-1 provided in the upper end surface 9b of the fitting convex part near the corner part 8 will be provided in the form where the bottom of the groove reaches the height direction of the fitting convex part 7, FIG. It may be an intermittent groove as shown. And since the groove part 10-2 of the side wall top upper end surface 9a of the corner part 8 vicinity is provided in a plane, it becomes a continuous shape.

  FIG. 2 is a plan view showing the box 2 shown in FIG. 1 and shows a state as an example of the overall arrangement of the groove 10.

  FIG. 3 is a perspective view illustrating a part of the box 2 of the embodiment shown in FIGS. 1 and 2 in an enlarged manner in order to make it easier to understand.

  FIG. 4 is a view showing an embodiment of an example in which a groove portion 10 that substantially obliquely crosses the vicinity of the corner portion 8 is provided with one groove portion 10 (groove portion 10-1) provided on the upper end surface 9b of the fitting convex portion. It is. The single groove may be a groove like the groove 10-2.

  Furthermore, the above-mentioned foamed synthetic resin containers are all described assuming a rectangular container, but even a circular, elliptical, polygonal container, etc., is the same as or similar to the above description. Can be applied. In other words, it may be a foamed synthetic resin container characterized in that a groove portion that crosses the central axis in the direction intersecting the central axis is provided on the upper end surface of the side wall. In this case, it is only necessary to literally intersect the direction intersecting the central axis, but it is preferable to provide one or more, preferably two or more in a direction substantially perpendicular to one central axis. When two or more strips are provided, it is preferable that one strip is provided on each of the upper end surfaces of the side walls intersecting with the one central axis, for a total of two strips or more.

  In addition to the above-mentioned one or more or two or more grooves, and further, one or more, preferably two or more, grooves in a direction substantially orthogonal to the other central axis substantially orthogonal to the one central axis It is more preferable to provide In the present invention, if necessary, the addition of the groove portion in a direction substantially orthogonal to the other central axis is not prevented. Even in the case of these circular containers and the like, the side wall upper end surface includes the side wall top upper end surface and / or the upper end surface of the fitting convex portion, and therefore the groove portion is provided in either or both of them. Of course.

  In the present invention, the groove portion 10 can be formed by a normal forming method by providing a plate-like body for forming the groove portion in a forming die used for forming the box 2. . When it is difficult to form the groove portion 10 by such a normal molding method, a core in which a plate-like body or the like according to the shape enters and exits in the direction of the groove portion 10 by opening and closing the molding die is used. It can be easily formed by using a plate-like core or the like that protrudes from time to time and is inclined parallel to the moving direction of the mold by a spring mechanism or the like. Further, it can be easily formed by causing the plate-like body or the like to protrude after the mold clamping by the air cylinder mechanism and storing the plate-like body or the like when the mold is opened.

  An inner bag is mounted inside the foamed synthetic resin container 1 to form a foamed synthetic resin container with an inner bag. There are no particular limitations on the material of the inner bag, such as high pressure method low density polyethylene, linear low density polyethylene, ethylene / vinyl acetate copolymer, polyolefin film such as polypropylene, or vinyl chloride, polyester, polyamide, etc. It can be formed using a film.

  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.

  In this inner bag, the cold storage material is accommodated in the inner bag and loaded into the box. In many cases, the inner bag is loaded in the box first, and the cold bag is stored in the inner bag. In many cases, after storing, the upper part of the inner bag is folded to cover the cold insulation. Therefore, the inner bag is formed so as to have flexibility, and a bag having a depth greater than the depth of the box, preferably about 1.5 to 3 times the depth of the box 2, is generally used. used.

  When the foamed synthetic resin container 1 of the present invention is used, the inner bag is easily engaged with the groove portion 10 by inserting the inner bag into the groove portion 10 after the inner bag is loaded inside the box 2. Stop and hold. This locking work can be locked manually by pressing the inner bag from the top of the box 2 with a plate having a thickness that enters the groove 10. However, if this work is mechanized, the locking work can be performed with high efficiency. Since it can be operated, its workability is very good.

  In the present invention, when the inner bag is inserted into the groove, since a substantially oblique groove portion is provided at the corner portion, the degree of freedom of inner bag locking is increased, so that the locking strength is increased and the upper end of the inner bag is outside the side wall. Therefore, it is possible to efficiently prevent contamination or wetting on the outside of the side wall when storing the cold-reserved material in the inner bag.

  After the inner bag can be locked in the foamed synthetic resin container, for example, after putting the cold insulation material with ice in the inner bag, the upper part of the inner bag is folded to cover the cold insulation material, and the lid is placed on it. Covering can finish the storing operation and can be used for shipping.

  The container made of foamed synthetic resin of the present invention can be used for storage and transportation of articles that require cold storage such as seafood, vegetables, etc., especially salmon, sword fish, salmon, salmon, broccoli, etc. Suitable for storage and transport of seafood and vegetables that can avoid cooling unevenness when transporting using ice.

It is a perspective view which shows the whole image of the one aspect | mode of the foam synthetic resin container of this invention. It is a top view of the box of the mode shown in FIG. It is a perspective view which shows a part of box of the aspect shown in FIG. It is a perspective view which shows a part of box of the other aspect of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Foamed synthetic resin container 2 Box 3 Lid 4 (4a, 4b) Long side wall 5 (5a, 5b) Short side wall 6 Bottom 7 Mating convex part 8 (8a, 8b, 8c, 8d) Corner | corner 9 Upper end surface groove provided 9a side wall top upper surface 9b convex portion upper surface 10 groove provided on the upper end surface 9b of the groove 10 _-1 convex portion _10-2 sidewall top upper surface 9a

Claims (5)

A foamed synthetic resin container comprising a lid and a box, and having a fitting structure in which the lower surface of the lid and the upper surface of the box are engaged with each other,
A foamed synthetic resin container , characterized in that a groove portion that crosses in an oblique direction is provided on an upper end surface in the vicinity of a plurality of corner portions where two adjacent side walls intersect. The upper end face of the two corners near the diagonal of the foamed synthetic resin container, characterized by comprising providing a groove, foamed synthetic resin container according to claim 1. 3. The foamed synthetic resin container according to claim 1, wherein a plurality of grooves each crossing in an oblique direction are provided on upper end surfaces in the vicinity of a plurality of corners. 4. The foamed synthetic resin container according to claim 3 , wherein two grooves each extending in an oblique direction are provided on the upper end surface in the vicinity of the plurality of corners . The upper end face of the corner portion near the foamed synthetic resin container, characterized in that it is intended to include the upper end surface of the side wall top portion upper end surface and / or the fitting convex portion, according to any one of claims 1 to 4 Foamed synthetic resin container.

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