JP2003026270A - Synthetic resin container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a synthetic resin container which can keep quality, is easy to handle and is excellent in transportation efficiency and workability. SOLUTION: The container comprises a base plate in a planarly rectangular form and foldable sidewalls connected with four sides of the base plate. The base plate is equipped with small vent holes approximately at its center and also with a bottom dent swelling downward. Grooves with small vent holes bored with appropriate intervals on a bottom are provided along peripheries. Further, small vent holes are formed at lower and upper ends of the four sidewalls. Side dents swelling outward are provided on at least a pair of opposite sidewalls. Reinforcing ribs are provided with appropriate intervals on grooves provided approximately at the center of the base plate and the grooves provided along the peripheries. Small vent holes are formed on a bottom between the reinforcing ribs, and upper rims of the grooves are preferably chamfered.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a synthetic resin container suitable for transportation, storage and ripening of fruits, particularly bananas.

[0002]

2. Description of the Related Art Bananas are mainly imported from production areas such as the Philippines, Costa Rica, and Taiwan. Bananas are harvested at an appropriate time and further ripened to be edible.
The bananas are disinfected and washed immediately after harvesting, and then packed in a poly film bag with holes to prevent transpiration and stored in a cardboard box. The cardboard boxes are then palletized and shipped to the port. During marine transportation, the cargo is usually cooled to 13.5 ° C in the hold, fumigated immediately after landing in Japan, and delivered to importers. The importer puts it in the warehouse once and fills it with dilute ethylene gas from the through hole provided on the short side wall of the cardboard box.
Aging (coloring) is performed for 4 to 5 days while adjusting to 5 to 20 ° C.

And, in a cardboard box for banana transportation,
As shown in FIGS. 9 and 10, a cardboard box having through holes on the upper and lower surfaces and short side surfaces is used. That is, in the cardboard box 1, when the bottom plate 2 on the short side and the bottom plate 3 on the long side are folded and folded, a rectangular bottom through hole surrounded by the tip surfaces of the bottom plates 2 and 3 and formed in the central portion. 5, when the lid plate 7 on the short side and the lid plate 9 on the long side are folded, these lid plates 7,
It is provided with a rectangular lid through hole 10 which is surrounded by the front end surface of 9 and is formed in the central portion. Further, the side wall on the short side has a handle hole 11 in the upper center and a small hole 13 in the lower corner.

The corrugated cardboard box having the above structure stores bananas and is arranged in parallel in a hold and is also stacked and stored in a plurality of upper and lower stages. Then, during shipping by sea in the hold, the air blown up from below the cardboard box escapes from the bottom through hole 5 of the cardboard box 1 to the lid through hole 10 to cool the banana stored therein to 13.5 ° C. To do.
The bottom through hole 5 and the lid through hole 10 serve as ventilation holes for circulating air in the cardboard box in the hold.

In order for the importer to age in the warehouse, the cardboard boxes stacked in two stages in the aging chamber are arranged in two rows at regular intervals, and diluted ethylene gas is sent from outside the cardboard box. The method of sucking from between is adopted. The handle hole 11 and the small hole 13 function as ventilation holes for circulating the diluted ethylene gas in the cardboard box.

[0006]

The cardboard box of the above structure which has been conventionally used has the following problems. That is, in order to maintain the freshness of the banana, it is necessary to cool it immediately after harvesting, but there is a problem that the cardboard box is rather warm and has a poor cooling effect. Further, since the cardboard box has a hygroscopic property, the pressure resistance strength is lowered during transportation, and the lower box may be crushed. In particular, it may be further crushed due to pitching / rolling during sea transportation, and the side walls and bottom bulge, causing the stored bananas to rub against each other, causing scratches.

Further, the cardboard box has poor air permeability, and coloring unevenness or uneven aging occurs during aging. Corrugated cardboard has poor strength, the position of the opening for aging is limited, and it cannot be provided at an appropriate position, so that the breathability is unbalanced. If a large number of through holes are provided to improve the air permeability, the strength will decrease and it cannot be used. Furthermore, since the corrugated cardboard box is a complicated assembly work and is a disposable piece that cannot be reused, it becomes a huge amount of waste and is discarded. The use of cardboard boxes has become a major social problem, as it causes the destruction of the global environment due to the waste of natural resources along with the problem of disposal as garbage.

[0008] Further, the cardboard box is not only time-consuming when disassembling, but it may cause injury, and since the inside is hardly visible during transshipment, it is handled messyly, and the soft pulp after maturation is treated. As a result, the epidermis is further damaged.

On the other hand, although a synthetic resin container can be used in place of the cardboard box, there are the following problems. That is, a vent is required for transportation and storage of bananas as described above, but in a container having a large number of through holes on the bottom and side walls, which is conventionally used, contact with bananas is severe and bananas are It will hurt and cannot be used. Further, when a container having no through hole at the bottom or side wall is used so as not to damage the banana, air permeability cannot be ensured.

The present invention has been made in view of the above situation, and maintains the quality of fruits, especially bananas.
It is intended to provide a synthetic resin container suitable for transportation and storage of bananas, which is easy to handle, excellent in aging, transportation efficiency and workability.

[0011]

In order to achieve the above object, the present invention has the following constitution. That is, a synthetic resin container according to the present invention is a container in which a flat rectangular bottom plate and side walls that can be folded back are connected to four sides of the rectangular bottom plate, and the rectangular bottom plate has a substantially central portion. In addition to providing ventilation small holes in the bottom, bulging bottom recesses are provided, the peripheral edge is provided with grooves with ventilation small holes formed at appropriate intervals in the bottom portion, and further with the lower end portions of the four side walls. A ventilation small hole is formed in the upper end portion, and side surface recesses that bulge outward are provided in at least a pair of opposing side walls. It is preferable that the ventilation small hole provided at the substantially central portion of the rectangular bottom plate is provided with a groove and is provided at the bottom of the groove. further,
Reinforcing ribs are provided at appropriate intervals in the groove in the substantially central portion and the groove in the peripheral portion of the rectangular bottom plate, and small ventilation holes are formed in the bottom portion between the reinforcing ribs, and the upper edge portion of the groove is chamfered. Preferably. Further, it is preferable that a reinforcing rib is provided in a groove in the peripheral portion of the rectangular bottom plate, a ventilation small hole is formed in a bottom portion between the reinforcing ribs, and an upper edge portion of the groove is chamfered.

A plurality of bottom surface recessed portions may be provided, and a groove having a ventilation small hole formed in the bottom portion may be provided at a boundary portion of the bottom surface recessed portions. It is preferable that the corners of the bottom surface recess and the side surface recess are continuous by a radius. Reinforcing ribs are provided at appropriate intervals in the groove in the substantially central portion and the groove in the peripheral portion of the rectangular bottom plate, and small ventilation holes are formed in the bottom portion between the reinforcing ribs, and the upper edge portion of the groove is chamfered. Further, the corners of the bottom surface recess and the side surface recess can be made continuous by a radius. Reinforcing ribs are provided on a plurality of grooves provided in parallel to the substantially central portion of the rectangular bottom portion and grooves on the peripheral portion, and ventilation small holes are formed in the bottom portion between the reinforcing ribs, and the upper edge portion of the groove is formed. Is preferably chamfered, and the corners of the bottom surface recess and the side surface recess are preferably continuous by a radius.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment showing a synthetic resin container according to the present invention will be described in detail. FIG. 1 is a plan view showing a corner portion in a developed state before assembly,
FIG. 2 is a bottom view of the same. The container 20 has a rectangular bottom plate 2.
A long side wall 23 and a short side wall 25 are continuously provided on opposite sides of the four sides of No. 1, respectively.

Between the rectangular bottom plate 21 and the long side wall 23,
The intermediate member 27 is provided. A hinge 29 can be bent between the rectangular bottom plate 21 and the intermediate member 27, and a hinge 30 can be bent between the intermediate member 27 and the long side wall 23. That is, hinges 29 and 30 are provided in parallel on both sides of the intermediate member 27, and the rectangular bottom plate 21 and the long side wall 23 are foldably connected to each other via the intermediate member 27.

An intermediate member 31 is provided between the rectangular bottom plate 21 and the short side wall 25. A hinge 33 can be bent between the rectangular bottom plate 21 and the intermediate member 31, and a hinge 35 can be bent between the intermediate member 31 and the short side wall 25. That is, on both sides of the intermediate member 31, the hinges 33, 35 are parallel to each other.
Is provided, and the rectangular bottom plate 21 and the short side wall 25 are continuously provided so as to be bendable via an intermediate member 31.

The rectangular bottom plate 21 is provided with bottom recesses 37, 37 projecting downward, which are parallel to each other in the longitudinal direction, and the side surfaces thereof are inclined. The bottom surface and the side surface of the bottom surface recess 37 are continuous by a rounded surface. The bottom surface recess 37 may be a curved surface that is continuous in its entirety. Further, a small hole 39 and a small hole 40 are continuously formed between the bottom surface recesses 37, 37 and in the peripheral portion of the bottom plate. The small holes 39 and 40 mainly function as ventilation holes for circulating cold air in the hold.

The small holes 39 are provided at the bottoms of the grooves 41, 41 formed between the bottom surface recesses 37, 37. That is, the reinforcing ribs 45, 45 are appropriately spaced in the grooves 41, 41.
And a groove 41 between the reinforcing rib 45 and the reinforcing rib 45.
It is provided in. Further, the small hole 40 has a rectangular bottom portion 21.
Is provided at the bottom of the groove 43 formed along the peripheral edge of the. That is, the reinforcing ribs 47, 4 are provided in the groove 43 at appropriate intervals.
7 are provided in the groove 43 between the reinforcing ribs 47.

The height of the reinforcing ribs 45, 47 is lower than the inner surface of the rectangular bottom plate 21, and the grooves 41, 4 are provided.
The inner surface of 3 and the inner surface of the rectangular bottom plate 21 are formed so as to be continuous by rounded surfaces. Grooves 41, 4
By forming the upper end of the inner surface of 3 into a rounded surface, the stored banana is not damaged. In addition, the groove 4
The depths of 1 and 43 are almost the same as the depth of the bottom surface recess 37.

As described above, if the small holes 39 and 40 are directly formed in the rectangular bottom plate 21, when the synthetic resin container is placed on the ground, the small holes 39 and 40 are closed and do not function as ventilation holes. By forming the small holes 39 and 40 at the bottoms of the grooves 41 and 43, the small holes 39 and 40 function more effectively as ventilation holes, and the grooves themselves reinforce the bottom plate. still,
By forming a small hole between the grooves 41, 41, it is possible to further improve the air permeability. Bottom recess 37
A small hole 48 is bored in this. The small hole 48 serves as a ventilation hole and also functions as an outlet for the condensed water or the like in order to prevent the banana from being contaminated by the condensed water or the sap. The corners of the small holes 48 are chamfered so as not to damage the banana.

Next, a small hole 4 is formed at the lower edge of the long side wall 23.
9 are continuously drilled, and a small hole 50 is continuously drilled in the upper edge portion. The inside corners of the small holes 49, 50 are chamfered so as not to damage the stored banana, and are formed into rounded surfaces. Between the small holes 49, 50 of the long side wall 23, a side surface recess 51 bulging outward is formed. The side surface of the side surface recess 51 is inclined, and the bulging surface and the side surface of the side surface recess 51 are continuous by a rounded surface. Further, the long side wall 23 is provided with small holes 52 at appropriate intervals. The inside of the small hole 52 is chamfered so as not to damage the banana.

Hooks 53, 53 for assembling with the short side wall 25 are provided at both end edges of the long side wall 23.
The hooks 53, 53 are provided so as to project into the through hole 54, but are provided so as not to protrude from the inner and outer surfaces of the long side wall 23. Reinforcing ribs 55, 57, 59 are provided on the outer surface of the long side wall 23 in the vertical and horizontal directions and in the oblique directions.

Next, the short side wall 25 is formed as a vertical surface having a smooth inner surface, and the hook 5 is formed at both end edges.
A projecting piece 60 that locks 3, 53 is provided. The projecting piece 60 is provided so as to project into the through hole 61 provided along the edge portion. The hooks 53, 53 are through holes 6
The long side wall 23 and the short side wall 25 are integrally assembled by being inserted into 1 and being locked to the projecting piece 60.

A handle hole 63 is formed in the short side wall 25, and reinforcing ribs 65, 6 are formed on the outer surface in the vertical and horizontal directions and in the diagonal direction.
7,69 are provided. Small holes 70 are formed in the short side wall 25 at appropriate intervals. The inside of the small hole 70 is chamfered so as not to damage the banana.
Although the inner surface of the short side wall 25 is a smooth vertical surface, it is possible to form a concave portion that bulges outward similarly to the long side wall 23.

Next, from the unfolded state of FIGS. 1 and 2, the container 2
The case where 0 is assembled will be described. First, the intermediate member 27 is bent 180 degrees inward from the hinge 29.
And the inner surface of the rectangular bottom plate 21 are joined. Next, the long side wall 23 is bent outward by 90 degrees from the hinge 30, and the intermediate member 27 and the side surface of the long side wall 23 are fitted together. On the other hand, on the short side wall 25, the inner surface of the intermediate member 31 and the inner surface of the rectangular bottom plate 21 are joined by bending the hinge 33 inward by 180 degrees. Next, the short side wall 25 is bent outward by 90 degrees from the hinge 35, and the intermediate member 31 and the side surface of the short side wall 25 are fitted together.

When folding from the assembled state, the short side wall 25 may be folded back from the hinge 35 and tilted inward, and then the long side wall 23 may be folded back from the hinge 30 and tilted inward. When assembled from the unfolded state, the hinge 30 is provided at a position higher than the hinge 35, so that the long side wall 23 can be folded over the short side wall 25.
It can be folded into a flat plate as a whole.

FIG. 8 shows another embodiment of the hinge portion.
In the above-described embodiment, the hinge portion that can be bent is the intermediate member 2
Although the membrane hinge structure is provided via 7 and 31, the intermediate members 27 and 31 can be omitted. Also, FIG.
A hinge structure may be used as shown in FIG. That is, the tubular portions 73 are provided on the side edges of the rectangular bottom plate 21 at appropriate intervals, and the tubular portions 75 fitted between the tubular portions 73 are provided on the long side wall 23 and the short side wall 25 at appropriate intervals. , The tubular portion 73
A hinge structure may be used in which the pin is connected to the tubular portion 75 through a pin 77 so that it can be bent. As described above, the hinge portion may have any known structure.

In the above embodiment, the rectangular bottom plate 21 is used.
The case where two bottom surface recesses are provided in parallel has been described, but the number of bottom surface recesses may be one, or may be three or more. When only one bottom surface recess is provided, one or two or more grooves 41 may be provided in the substantially central portion, and small holes 39 serving as ventilation holes may be formed in the grooves 41 at appropriate intervals. When the bottom surface recesses are three or more, one or two or more grooves 41 are provided at the boundary of each bottom surface recess, and the small holes 39 serving as ventilation holes are provided in the grooves 41, as in the illustrated embodiment. May be provided at appropriate intervals.

[0028]

As is apparent from the above description, the present invention provides the bottom plate with the bottom surface recess and the long side wall with the side surface recess, so that the stored banana comes into surface contact with the bottom plate and the inner surface of the side wall. It can prevent banana damage. In addition, since a small hole for ventilation is formed in the bottom plate at a portion where contact with the banana is small, cold air circulates smoothly and can be cooled rapidly. It is especially effective for cooling inside the hold. Further, since the ventilation small holes are formed on the bottom surface of the groove, contact with the banana is avoided and good ventilation is obtained. Further, since the small holes for ventilation of the side wall are provided in the upper part and the lower part where the banana is less likely to contact, the banana is not damaged. Furthermore, since chamfered small holes are formed at appropriate intervals on the long side wall and the short side wall, air permeability is ensured and fumigation can be efficiently performed, and the chamfered banana Not hurt.

[Brief description of drawings]

FIG. 1 is a quarter plan view showing an inner surface of a container according to the present invention in a developed state.

FIG. 2 is likewise a plan view of a quarter showing the outer surface.

FIG. 3 is a cross-sectional view of an essential part showing a connecting portion between a rectangular bottom plate and long side walls.

FIG. 4 is a cross-sectional view of essential parts showing a connecting portion between a rectangular bottom plate and short side walls.

FIG. 5 is a plan view showing a half of an assembled state.

FIG. 6 is a side view showing one cross section of the long side wall in the assembled state.

FIG. 7 is a side view showing one cross section of the short side wall in the assembled state.

FIG. 8 is a cross-sectional view of essential parts showing another embodiment of the hinge structure.

FIG. 9 is a perspective view of a conventional cardboard box.

FIG. 10 is an explanatory cross-sectional view showing a state in which a banana is stored in a conventional cardboard box.

[Explanation of symbols]

20 containers 21 square bottom plate 23 Long side wall 25 Short side wall 27, 31 Intermediate member 29, 30 hinges 33, 35 hinges 37 Bottom recess 39, 40 small holes 41, 43 groove 45, 47 Reinforcing ribs 49, 50 small holes 51 Side recess 52 small holes 53 hooks 59 Reinforcing rib 60 projectiles 61 through hole 63 Handle hole 65, 66, 67 Reinforcing ribs 70 small holes

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Masaru Yaguchi             No. 1 Nobezawa, Kaisei-cho, Ashigarakami-gun, Kanagawa Stock             Company Meiji Rubber Kasei Head Office Factory (72) Inventor Noriaki Hara             No. 1 Nobezawa, Kaisei-cho, Ashigarakami-gun, Kanagawa Stock             Company Meiji Rubber Kasei Head Office Factory (72) Inventor Takami Yamada             5-12 Hibarigaoka, Hadano City, Kanagawa Prefecture F term (reference) 3E035 AA11 BA01 BB03 BB04 BB07                       BC02 DA02                 3E061 AA02 AA05 AB09 AD08 CA02                       DA04 DA06 DA14 DB17                 3E067 AA11 AB09 AC03 BA01A                       BB14A BC06A EE12 EE19                       EE39 FA01 FC03 GA19 GB02                       GB07 GD02

Claims (9)

[Claims] 1. A container comprising a planar rectangular bottom plate and four side walls of the rectangular bottom plate, which are provided with foldable side walls.
The rectangular bottom plate is provided with a ventilation small hole at substantially the center thereof, a bottom concave portion bulging downward, and a groove provided with a ventilation small hole at an appropriate interval on the bottom portion at the peripheral portion. Further, the synthetic resin container is characterized in that small holes for ventilation are formed in the lower and upper ends of the four side walls, and at least a pair of opposing side walls are provided with side surface recesses that bulge outward. 2. The synthetic resin container according to claim 1, wherein the ventilation small hole provided substantially in the center of the rectangular bottom plate is provided with a groove, and is formed in the bottom of the groove. . 3. The rectangular bottom plate is provided with reinforcing ribs at appropriate intervals in a groove in a substantially central portion and a groove in a peripheral portion thereof, and a ventilation small hole is formed in a bottom portion between the reinforcing ribs. 3. The edge part is chamfered, and claim 1 or claim 2 characterized by the above-mentioned.
The synthetic resin container described in. 4. Reinforcing ribs are provided in a plurality of grooves provided in parallel to the substantially central portion of the rectangular bottom plate and in the groove of the peripheral edge portion, and ventilation small holes are formed in the bottom portion between the reinforcing ribs. The synthetic resin container according to claim 1 or 2, wherein the upper edge portion is chamfered. 5. The synthetic resin according to claim 1, wherein a plurality of bottom surface recesses are provided, and a groove having a ventilation small hole formed at the bottom is provided at the boundary of the bottom surface recesses. container. 6. The synthetic resin container according to claim 1, wherein the corners of the bottom surface recess and the side surface recess are continuous by a radius. 7. A rectangular bottom plate is provided with reinforcing ribs at appropriate intervals in a groove in a substantially central portion and a groove in a peripheral portion, and a ventilation small hole is formed in a bottom portion between the reinforcing ribs. The edge portion is chamfered, and further, the corner portions of the bottom surface recess and the side surface recess are continuous by a radius.
Alternatively, the synthetic resin container according to claim 2. 8. Reinforcing ribs are provided in a plurality of grooves provided in parallel to approximately the central portion of the rectangular bottom portion and in the groove of the peripheral portion, and ventilation small holes are formed in the bottom portion between the reinforcing ribs. The synthetic resin container according to claim 1 or 2, wherein the upper edge portion of the groove is chamfered, and the corner portions of the bottom surface recess and the side surface recess are continuous by a radius. 9. A plurality of bottom surface recesses are provided, a groove having a ventilation small hole formed at the bottom is provided at the boundary of the bottom surface recess, and the corners of the bottom surface recess and the side surface recess are continuous by a radius. The synthetic resin container according to claim 1 or 2, which is characterized in that.