JP4736078B2 - Plastic container - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a synthetic resin container suitable for transporting, storing and ripening fruits, particularly bananas.
[0002]
[Prior art]
Bananas are mainly imported from the Philippines, Costa Rica, Taiwan and other production areas. Bananas are harvested at the right time and then fully ripened by ripening and become edible. Bananas are sterilized and washed immediately after harvesting, and then packed in a polyfilm bag with a hole in order to prevent transpiration and stored in a cardboard box. The cardboard boxes are then palletized and transported to the port. During marine transportation, in the hold, it is usually cooled to 13.5 ° C, fumigated immediately after landing in Japan, and delivered to an importer. The importer once puts it in the warehouse and fills it with diluted ethylene gas from the through-hole provided on the side wall on the short side of the cardboard box, and matures (colors) for 4-5 days while adjusting to 15 ° C-20 ° C. I do.
[0003]
And as shown in FIG.9 and FIG.10, the cardboard box which provided the through-hole in the up-and-down surface and the short side surface is used for the cardboard box for banana transport. That is, the cardboard box 1 has a rectangular bottom through-hole formed in the center portion surrounded by the front end surfaces of the bottom plates 2 and 3 when the bottom plate 2 on the short side and the bottom plate 3 on the long side are folded. 5 and a rectangular lid portion through-hole formed in the center portion of the lid plates 7 and 9 when the lid plate 7 on the short side and the lid plate 9 on the long side are folded. 10. Further, the side wall on the short side is provided with a handle hole 11 at the upper center and a small hole 13 at the lower corner.
[0004]
The cardboard boxes having the above structure store bananas and are juxtaposed in the hold, and are stacked and stored in multiple stages. Then, during the sea transport in the hold, the banana accommodated is cooled to 13.5 ° C. by the air blown up from below the cardboard box passing through the bottom through hole 5 of the cardboard box 1 to the cover through hole 10. To do. The bottom through-hole 5 and the lid through-hole 10 serve as vent holes for circulating air in the cardboard box in the hold.
[0005]
In order for the importer to ripen in the warehouse, the cardboard boxes stacked in two stages in the aging room are arranged in two rows at regular intervals, and dilute ethylene gas is sent from the outside of the cardboard boxes, and from between the rows. A suction method is adopted. The handle hole 11 and the small hole 13 function as vent holes for circulating the diluted ethylene gas into the cardboard box.
[0006]
[Problems to be solved by the invention]
The corrugated cardboard box having the above-described structure has the following problems. That is, in order to maintain the freshness of the banana, it is necessary to cool it quickly after harvesting. However, the cardboard box has a problem that it is rather warm and has a poor cooling effect. Further, since the cardboard box has a hygroscopic property, the compressive strength is reduced during transportation, and it may be crushed in the lower stage. In particular, it may be crushed further by pitching / rolling during marine transportation, and the side walls and the bottom will swell, and the stored bananas will rub against each other causing damage.
[0007]
Further, the cardboard box has poor air permeability, and uneven coloring and uneven aging occur during aging. Corrugated cardboard has low strength, the position of the opening for aging is limited, and the corrugated cardboard is not provided at an appropriate position, so the air permeability balance is poor. If a large number of through holes are provided to improve the air permeability, the strength is lowered and cannot be used. Furthermore, the corrugated cardboard box has a complicated assembling work and is a disposable that cannot be reused. Along with the problem of disposal as garbage, the use of cardboard boxes has become a major social problem, leading to the destruction of the global environment due to the waste of natural resources.
[0008]
In addition, cardboard boxes are not only troublesome to dismantle, but they can be injured, and when transshipping, the inside is almost invisible, so they are handled messy, and the soft flesh and skin after maturation are removed. The result is more hurting.
[0009]
On the other hand, although a synthetic resin container can be used instead of the cardboard box, there are the following problems. In other words, as described above, ventilation holes are required for transporting and storing bananas. However, in containers that have many through holes in the bottom and side walls as used in the past, contact with bananas is intense, and It will hurt and cannot be used. In addition, in order to prevent the banana from being damaged, when a container having no through hole is used in the bottom or the side wall, air permeability cannot be ensured.
[0010]
The present invention has been made in view of the above-described present situation, and is made of a synthetic resin suitable for transporting and storing bananas which retains the quality of fruits, particularly bananas, and is easy to handle and excellent in ripening, transport efficiency and workability. A container is provided.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is configured as follows. That is, the 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 on the four sides of the rectangular bottom plate are connected to each other. And a groove having a ventilation hole at the bottom along the long side wall, and a bottom recess for placing contents on both sides of the groove provided at the center. The concave portion is formed by making the inclined surface or the curved surface face each other, and further, a ventilation hole is formed at least at the lower end portion and the upper end portion of the long side wall among the four side walls, and the lower end portion and the upper end portion are formed. A side recess that bulges outward is formed between the vent holes.
[0012]
The bottom concave portion can be formed by setting a central portion to a rectangular horizontal plane and making inclined surfaces or curved surfaces face each other on both sides of the rectangular horizontal plane. In addition, reinforcing ribs are provided at appropriate intervals in the central groove and the peripheral groove of the square bottom plate, and a ventilation hole is formed in the bottom between the reinforcing ribs, and the upper edge of the groove is chamfered. It is preferable that Moreover, the groove | channel of the center part of a square bottom plate can be comprised from the several groove | channel provided in parallel. In addition, the peripheral corners of the bottom recess and the side recess are made continuous by a rounded surface, and a small hole is formed in the bottom recess as a drain hole for condensed water, and the corner of the small hole is chamfered. preferable.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment illustrating a synthetic resin container according to the present invention will be described in detail. FIG. 1 is a plan view showing a developed corner before assembly, and FIG. 2 is a bottom view of the same. The container 20 is formed by connecting a long side wall 23 and a short side wall 25 to the opposite sides of the four sides of the rectangular bottom plate 21.
[0014]
An intermediate member 27 is interposed between the rectangular bottom plate 21 and the long side wall 23. The rectangular bottom plate 21 and the intermediate member 27 can be bent by a hinge 29, and the intermediate member 27 and the long side wall 23 can be bent by a hinge 30. That is, the 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 connected to each other via the intermediate member 27 so as to be bent.
[0015]
An intermediate member 31 is interposed 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, hinges 33 and 35 are provided in parallel, and the rectangular bottom plate 21 and the short side wall 25 are continuously connected via the intermediate member 31 so as to be bent.
[0016]
The rectangular bottom plate 21 is formed with bottom concave portions 37 and 37 projecting downward on the outer surface side in parallel along the longitudinal direction, and the side surfaces thereof are inclined. The bottom surface and the side surface of the bottom recess 37 are continuous by a rounded surface. As shown in FIGS. 1, 2, and 6, the bottom recess 37 is a recess having a width for placing a banana as a content, and is formed by continuing a curved surface on the opposite side of the horizontal bottom surface. Has been. The bottom recess 37 may be a curved surface that is continuous throughout. Further, a small hole 39 and a small hole 40 are continuously formed between the bottom surface concave portions 37 and 37 and the peripheral edge of the bottom plate. The small holes 39 and 40 mainly function as vent holes for circulating cold air in the hold.
[0017]
The small hole 39 is provided at the bottom of grooves 41, 41 formed between the bottom recesses 37, 37. That is, reinforcing ribs 45, 45 are provided at appropriate intervals in the grooves 41, 41, and are provided in the grooves 41 between the reinforcing ribs 45. The small hole 40 is provided at the bottom of the groove 43 formed along the peripheral edge of the rectangular bottom 21. That is, the reinforcing ribs 47 and 47 are provided in the groove 43 at an appropriate interval, and are provided in the groove 43 between the reinforcing ribs 47 and 47.
[0018]
The heights of the reinforcing ribs 45 and 47 are formed lower than the inner surface of the rectangular bottom plate 21, and the inner surfaces of the grooves 41 and 43 and the inner surface of the rectangular bottom plate 21 are formed so as to be continuous with the rounded surfaces, respectively. Has been. By making the upper ends of the inner surfaces of the grooves 41 and 43 into rounded surfaces, the stored banana is not damaged. The depth of the grooves 41 and 43 is substantially the same as the depth of the bottom recess 37.
[0019]
In this way, if the small holes 39 and 40 are directly drilled in the rectangular bottom plate 21, the small holes 39 and 40 are closed when the synthetic resin container is placed on the ground, so that the small holes 39 do not function. , 40 are formed in the bottom of the grooves 41, 43 so that they function more effectively as vent holes, and the grooves themselves reinforce the bottom plate. Incidentally, it is possible to further improve the air permeability by forming a small hole between the grooves 41 and 41. A small hole 48 is formed in the bottom recess 37. The small hole 48 serves as a vent hole and functions as a discharge hole for condensed water and the like in order to prevent the banana from being soiled by condensed water and sap. The corners of the small holes 48 are chamfered so as not to damage the banana.
[0020]
Next, small holes 49 are continuously drilled in the lower edge of the long side wall 23, and small holes 50 are continuously drilled in the upper edge. The corners inside the small holes 49 and 50 are chamfered so as not to damage the stored banana, and are formed in a rounded surface. Between the small holes 49 and 50 of the long side wall 23, a side recess 51 bulging outward is formed. The side surface of the side recess 51 is inclined, and the bulging surface and the side surface of the side recess 51 are continuous by a rounded surface. In addition, small holes 52 are formed in the long side wall 23 at appropriate intervals. The inside of the small hole 52 is chamfered so as not to damage the banana.
[0021]
Hooks 53 and 53 to be assembled with the short side wall 25 are provided at both side edges of the long side wall 23. The hooks 53, 53 are provided so as to protrude 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, and 59 are provided on the outer surface of the long side wall 23 in the vertical and horizontal directions and in the oblique direction.
[0022]
Next, the short side wall 25 is formed in a vertical surface with a smooth inner surface, and projecting pieces 60 for locking the hooks 53 are provided on both side edge portions. The protruding piece 60 is provided so as to protrude into a through hole 61 provided along the edge portion. The long side wall 23 and the short side wall 25 are assembled together by inserting the hooks 53, 53 into the through-hole 61 and engaging with the protruding piece 60.
[0023]
A hand hole 63 is formed in the short side wall 25, and reinforcing ribs 65, 67, and 69 are provided on the outer surface in the vertical and horizontal directions and in an oblique direction. 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. In addition, although the inner surface of the short side wall 25 is a smooth vertical surface, as with the long side wall 23, it is possible to form a recess that bulges outward.
[0024]
Next, the case of assembling the container 20 from the unfolded state of FIGS. 1 and 2 will be described. First, the inner surface of the intermediate member 27 and the inner surface of the rectangular bottom plate 21 are joined by bending 180 degrees inward from the hinge 29 portion. . Next, the long side wall 23 is bent 90 degrees outward from the hinge 30 to fit the intermediate member 27 and the side surface of the long side wall 23. On the other hand, at 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 inward 180 degrees from the hinge 33 portion. Next, the short side wall 25 is bent 90 degrees outward from the hinge 35 so that the intermediate member 31 and the side surface of the short side wall 25 are fitted.
[0025]
When folded from the assembled state, the short side wall 25 may be folded back from the hinge 35 and folded inward, and then the long side wall 23 may be folded from the hinge 30 and folded inward. When assembled from the unfolded state, the hinge 30 is provided at a position higher than the hinge 35. Therefore, the long side wall 23 can be folded on the short side wall 25 and folded into a horizontal plate-like body as a whole. be able to.
[0026]
FIG. 8 shows another embodiment of the hinge portion. In the above embodiment, the hinge portion that can be bent is a membrane hinge structure provided via the intermediate members 27 and 31, but the intermediate members 27 and 31 can be omitted. Moreover, as shown in FIG. 8, a hinge structure may be sufficient. That is, the tubular portion 73 is provided at an appropriate interval on the side edge of the rectangular bottom plate 21, and the tubular portion 75 fitted between the tubular portion 73 is provided at the long side wall 23 and the short side wall 25 at an appropriate interval. Further, a hinge structure may be used in which the tubular portion 73 and the tubular portion 75 are connected through a pin 77 so as to be bent. Thus, the hinge portion can have a known arbitrary structure.
[0027]
In the above embodiment, the case where two bottom surface recesses of the rectangular bottom plate 21 are provided in parallel has been described. However, the number of bottom surface recesses may be one, or three or more. In the case where the number of bottom recesses is one, one or more grooves 41 are provided in the substantially central portion, and small holes 39 serving as vent holes may be formed in the grooves 41 at appropriate intervals. When the number of bottom surface recesses is 3 or more, similarly to the illustrated embodiment, one or two or more grooves 41 are provided at the boundary between the bottom surface recesses, and small holes 39 serving as ventilation holes are formed in the grooves 41. May be drilled at appropriate intervals.
[0028]
【The invention's effect】
As apparent from the above description, since the bottom plate is provided with the bottom surface recess and the long side wall is provided with the side surface recess, the stored banana comes into surface contact with the bottom plate and the side wall inner surface. Can be prevented. Moreover, since the small hole for ventilation | gas_flowing was drilled in the part with little contact with a banana in a baseplate, cold air can circulate smoothly and can cool rapidly. It is especially effective for cooling in the hold. Further, since the ventilation hole is formed on the bottom surface of the groove, contact with the banana is avoided and good ventilation is obtained. Moreover, since the small holes for ventilation on the side wall are provided at the upper part and the lower part where the banana hardly contacts, the banana is not damaged. Furthermore, since the chamfered small holes are drilled 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 banana is chamfered. Will not hurt.
[Brief description of the 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 also a quarter plan view showing the outer surface.
FIG. 3 is a cross-sectional view of a main part showing a connecting portion between a rectangular bottom plate and a long side wall.
FIG. 4 is a cross-sectional view of an essential part showing a connecting portion between a rectangular bottom plate and a short side wall.
FIG. 5 is a plan view showing a half of the 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 a main part showing another embodiment of a hinge structure.
FIG. 9 is a perspective view of a conventional cardboard box.
FIG. 10 is an explanatory sectional view showing a state in which a banana is stored in a conventional cardboard box.
[Explanation of symbols]
20 container 21 rectangular bottom plate 23 long side wall 25 short side wall 27, 31 intermediate member 29, 30 hinge 33, 35 hinge 37 bottom recess 39, 40 small hole 41, 43 groove 45, 47 reinforcing rib 49, 50 small hole 51 Side recess 52 Small hole 53 Hook 59 Reinforcement rib 60 Protruding piece 61 Through hole 63 Hand hole 65, 66, 67 Reinforcement rib 70 Small hole

Claims (6)

A container comprising a flat rectangular bottom plate and side walls that can be folded back on four sides of the rectangular bottom plate, wherein the rectangular bottom plate includes a peripheral edge of the bottom plate and a central portion of the bottom plate along the long side wall. A groove having a ventilation hole is provided at the bottom, and bottom recesses for placing contents are formed on both sides of the groove provided at the center, and the bottom recess is made to face an inclined surface or a curved surface. In addition, a small vent hole is formed at the lower end and upper end of at least the long side wall of the four side walls, and bulges outward between the lower end and the upper vent small hole. A synthetic resin container characterized in that a side recess is formed. The synthetic resin container according to claim 1 , wherein the bottom concave portion is formed with a central portion having a rectangular horizontal surface and inclined surfaces or curved surfaces facing each other on both sides of the rectangular horizontal surface . Rectangular in grooves of the groove and the periphery of the central portion in the shape bottom plate provided at appropriate intervals reinforcing ribs, the ventilation small holes formed in the bottom portion between the reinforcing ribs, the upper edge of the groove chamfered The synthetic resin container according to claim 1 or 2, wherein the container is made of synthetic resin. Square grooves of central portion in the shape bottom plate, the synthetic resin container according to claim 1, characterized in that it consists of a plurality of grooves formed in parallel. The synthetic resin container according to any one of claims 1 to 4, wherein the peripheral corners of the bottom recess and the side recess are continuous by a rounded surface . 6. The small hole serving as a dew condensation water discharge hole is formed in the bottom concave portion , and a corner portion of the small hole is chamfered. 6. Synthetic resin container.

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