JP2002087474A - Returnable box made of plastic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a returnable box made of a plastic, which is excellent in air permeability and whose nets are exchangeable easily. SOLUTION: The returnable case comprises a lid 11 and a container main body 12 which allows the lid to detachably join to an upper opening of the container main body. A top plate 13 of the lid is provided with net parts 18. The container main body has side walls 50 which are upwardly and outwardly inclined so as to be capable of being telescopically nested. A lower end of each support part 53 at four corner portions is projected from a bottom plate, and the bottom plate and each side wall are provided with net parts 59. Each net part is formed by mounting a net plate having a net into a fitting hole from the inside thereof, and the net parts of the top and the bottom plates are disposed in the positions closer to their central portions, respectively, and the net parts of the side walls are disposed in the positions closer to the support parts 53 at the four corner portions, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic returnable box suitable for transporting and storing fruits such as mango and papaya, and more particularly to a container in which a container body and a lid are kept tightly closed.
The present invention relates to a plastic returnable box that can prevent insects and insects from entering.

[0002]

2. Description of the Related Art When importing fruits such as mango and papaya from abroad, cardboard boxes are used because they are relatively inexpensive. Cardboard boxes are palletized and transported to the port. In order to transport and store fruits such as mangoes, insects and insects must be prevented from entering, and air permeability must be ensured for cooling in the hold during transportation by sea. Therefore, conventionally, a cardboard box having a structure as shown in FIG. 23 has been used.

The cardboard box 1 has a bottom 3 and a cover 4 connected to a side wall 2, and the bottom 3 and the cover 4 are respectively connected to four bottom plates 3a to 3d connected from each side wall and a cover plate. 4a-4d
These bottom plates 3a to 3d and lid plate 4a
4d are assembled by folding each of them. The bottom plates 3a to 3d and the lid plates 4a to 4d are provided with insect repellent nets 3e and 4e for ensuring air permeability inside and outside the box and for preventing insects, insects and the like from entering.

When the bottom plates 3a to 3d are folded, the insect nets of the overlapping bottom plates coincide with each other, and the cover plates 4a to 4d
Are folded, the insect-proof nets of the overlapping lid plates coincide, and four insect-proof nets are provided on the bottom 3 and four places on the cover 4. Insect repellent net 3 of bottom plate 3a-3d
e and the insect net 4e of the cover plates 4a to 4d are configured to coincide in the vertical direction. The area of the insect-proof net when assembled as a cardboard box 1, that is, the bottom 3
The area of the insect-proof net of the cover 4 is formed so as to occupy about 3% of the total surface area of the cardboard box 1.

[0005] The cardboard box 1 having the above structure, in which fruits such as mangoes are stored, is stored in a row in a hold and stacked up and down in a plurality of stages during sea transportation. And
In the hold, the air blown up from below the cardboard box 1 passes through the insect net at the bottom of the cardboard box 1 and through the insect net at the lid to the upper cardboard box to cool the fruits to a predetermined temperature. can do. The insect net serves as a vent for circulating air inside the cardboard box in the hold.

Therefore, when these cardboard boxes 1 are stacked, as shown in FIG.
And the insect net of the lid 4 coincides at four places and communicates in the vertical direction. The cardboard box 1 is not completely closed, but the air permeability is secured by the insect-proof net, and the freshness of the stored fruits can be maintained. The mesh size of the insect net is 1.5 mm or less as a measure against insects, and the cardboard box 1 is a disposable one-way.

[0007]

The bottom 3 and the lid 4
Are assembled by folding and bonding the bottom plates 3a to 3d and the lid plates 4a to 4d, respectively, so that the airtightness is maintained. However, the above-mentioned conventional cardboard box transport method has the following problems. That is, since the cardboard has hygroscopicity, the pressure resistance decreases during transportation, and the lower cardboard box may be crushed, and in particular, may be further collapsed by pitching and rolling during marine transportation.

In addition, since it is not possible to provide a gap between the lower box and the upper box and stack them, in order to ensure air permeability, the insect net at the bottom and the insect net at the lid are formed so as to overlap. Must have been. Further, in order to ensure the strength of the box, the insect net cannot be provided on the side wall. Therefore, air only flows vertically from the bottom of the insect net to the bottom, and does not convect the entire box.

In addition, the cardboard box is complicated in assembling work and is disposable which cannot be reused. Therefore, a huge amount of garbage is discarded. At the same time, waste of natural resources has led to the destruction of the global environment and has become a major social problem. In addition, the cardboard box not only takes time to dismantle, but also may cause injury,
During transshipment, the inside is almost invisible, so it is handled messyly, resulting in damage to the stored fruits.

The present invention has been made in view of the above situation, and provides a plastic returnable box which maintains the quality of fruits, is easy to handle, and has excellent transport efficiency and workability. In particular, it is an object of the present invention to provide a plastic returnable box which is excellent in air permeability and can easily exchange a net.

[0011]

The present invention has the following configuration to achieve the above object. A plastic return box according to the present invention comprises a lid and a container body for detachably fitting the lid to an upper opening, and a top plate of the lid is provided with a net portion. The main body is characterized in that the side walls are inclined upward and outward so that nesting can be performed, and the lower ends of the four pillars protrude from the bottom plate, and the bottom plate and the side walls are provided with a net portion.
The net portion is formed by attaching a net plate having a net to the fitting hole from the inside, the net portions of the top plate and the bottom plate are disposed near the center portion, and the net portions on the side walls are disposed near the four corner support portions. Has been established.

The net portions of the top plate and the bottom plate are formed by attaching the net plate to fitting holes provided in the top plate or the bottom plate, and the net plate is provided with a net provided at a central portion and a peripheral frame portion. The frame portion has a tip protruding from a side surface of the frame portion and a flexible locking spring protruding therefrom, and the fitting hole is formed on a peripheral edge of a through hole provided in a top plate or a bottom plate. An L-shaped fixing frame is provided in a substantially U-shaped plane, a locking piece protruding inward is provided on a part of the peripheral surface of the through hole, and the net plate is provided on an inner surface of the L-shaped fixing frame. Is formed by providing a concave portion into which the locking spring is fitted. Further, the net plate includes a net provided in a central portion and a peripheral frame portion, and a locking portion is provided in the frame portion, and the locking portion is
A locking piece frame is provided on one side surface which is flush with an inner surface of a through hole provided in an appropriate position of the frame portion, and the locking frame has an outward locking piece directed toward the frame portion within the range of the through hole. The fitting hole is provided with a step portion for fitting the net plate on the inner surface of the periphery of the through hole provided in the top plate or the bottom plate, and the outer surface of the top plate or the bottom plate at the periphery of the through hole. May be formed by providing a protective frame.

The net portion of the side wall is formed by attaching a net plate to a fitting hole of a concave wall formed by indenting a lower end portion of the side wall inward. Is provided, a fitting groove is provided on the side surface and the lower surface of the frame portion, a locking portion is provided on the upper portion, and the locking portion is formed by projecting a locking piece upward from the lower surface of the through hole, The fitting hole is provided with a rib that fits into the fitting groove of the net plate on a side surface and a lower surface of the through-hole provided in the recess wall, and the rib is located more inward of the container body than the side wall in a plane. It is constituted by arranging. The fitting grooves on the side surface and the lower surface of the net plate alternately protrude locking pieces along both surfaces of the frame portion, and provide a predetermined interval between the alternate locking pieces in the thickness direction of the frame portion. Can be formed. Further, the size of the mesh of the net is preferably 1.5 mm or less.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a plastic return box according to the present invention will be described with reference to the drawings.
The plastic return box 10 includes a lid 11 and a container body 12.
And is formed in a substantially square planar shape. When the lid 11 is fitted to the plastic return box 10, the upper container body 12 can be placed on the lower lid 11 for stacking. At this time, the lower lid 11 is subjected to an upper load. Therefore, it is formed so as not to be expanded or damaged and to maintain the airtightness. The lid 11 is formed so as to be nested between the lids, and the container body 12 is formed so as to be nested between the container bodies.

First, the lid 11 will be described. Lid 1
1 is provided with a peripheral frame 15 on the outer periphery of a top plate 13 having a substantially square planar shape. In the longitudinal direction of the top plate 13, a reinforcing groove 16 that opens inward is formed, and on both sides of the reinforcing groove 16, net portions 18, 18 described later are symmetrically arranged. The net portions 18 are arranged near the center of the top plate 13.

As shown in FIGS. 3 and 4, the peripheral frame 15 includes an inner flange 19, a horizontal portion 20, and an outer flange 21 facing upward from the top plate 13. Accordingly, in the peripheral frame 15, a groove for fitting a fitting frame of the container body 12 described later is formed by the inner flange 19, the horizontal portion 20, and the outer flange 21. Outer flange 21
Is formed by an inclined surface 21a connected to the horizontal portion 20 and a vertical surface 21b connected to the inclined surface 21a. In this way, by forming the outer flange by the inclined surface and the vertical surface, the sealing performance with the fitting frame is improved.

At the four corners of the peripheral frame 15, as shown in FIG. 1, there are formed step portions 23 in which the upper portions of the horizontal portion 20 and the outer flange 21 are recessed. The step portion 23 is fitted into the upper end concave portions at the four corners of the container main body to thereby form the lid 11.
Are securely fitted to prevent displacement in the horizontal direction, and the lid 11
To prevent them from expanding. Further, on the inner surface of the horizontal portion 20, ridges 25, 25 are continuously provided in parallel over the entire circumference.

Therefore, the ridges 25, 25 are
Are also provided continuously on the inner surface of. The number of the ridges 25 is determined in relation to the upward groove of the container body, and may be one or more. The protruding ridges 25 and 25 function to reliably maintain the hermeticity with the container body 12 even when the lid 11 is displaced in the horizontal direction.

The outer flange 21 of the peripheral frame 15 is provided with fixing holes 27, 27. The fixing hole 27,
27 are 2 in the longitudinal direction in the illustrated embodiment.
The lid 11 is provided one by one to prevent the lid 11 from being inadvertently opened by fitting the fixing projection of the container body 12.

Further, a binding portion 28 for an insulating lock is provided on the peripheral frame 15 of the lid 11. As shown in FIGS. 2 and 5, the binding portion 28 includes an outer flange 21.
Is formed by providing a slit 29 for inserting the band portion of the insulok and a binding plate 30 below the slit 29. The binding plate 30 is formed by cutting out the outer surface of the outer flange 21 below the slit 29 by substantially the thickness of the band of the insulok. As described above, the outer surface is substantially flush with the outer flange 21 when the insul lock is attached by notching by the thickness of the band substantially.

FIGS. 6 to 8 show the configuration of the net section 18. FIG. The net portion 18 is formed by attaching the net plate 31 to a fitting hole 33 provided in the top plate 13. The net plate 31 is provided with a net 37 at the center and a locking portion 40 at a peripheral frame portion 39. The net 37 is formed integrally with the frame 39, and the size of the mesh is preferably 1.5 mm or less.

The locking portion 40 is provided with a through hole 40a at an appropriate position on the frame portion 39, and the through hole 40a is formed on one surface of the frame portion 39.
The locking piece frame 40b, which is flush with the inner surface of
The locking piece frame 40b is formed by projecting an outward locking piece 40c toward the frame portion 39 within the range of the through hole 40a.
The locking piece 40c is flexible and has a spring action.

On the other hand, the fitting holes 33 forming the net portion 18
Are provided in parallel on both sides of the reinforcing groove 16. The fitting hole 33 is provided by providing a step portion 33b for fitting the net plate 31 on the inner surface of the top plate 13 on the periphery of the through hole 33a and by providing a protection frame 33c on the outer surface of the top plate 13 on the periphery of the through hole 33a. (See FIGS. 6 and 8). In the above configuration, the net portion 18 is
Is inserted from inside the fitting hole 33 with the locking piece frame 40b outside, the frame portion 39 fits into the step portion 33b. At the same time, the locking piece frame 40b projects from the through hole 33a to the outside of the top plate, and is assembled by locking the locking piece 40c to the top plate inside the protection frame 33c.

The net plate 31 does not come out of the top plate by the frame portion 39 being fitted into the step portion 33b, and the locking piece 40c is locked to the top plate in the protection frame 33c. It does not fall inside. Also,
Since the locking piece 40c has its outer surface protected by the protective frame 33c, the locked state is not released by collision. Further, when the net plate 31 such as the net 37 is broken, the locking pieces 40c
Can be removed from the through hole 33a by pressing it toward the locking piece frame 40b side, or the locking piece 40c can be cut out to form the through hole 33a.
By removing the net board 31, only the net board 31 can be replaced.

Next, the configuration of the container body 12 will be described. The container main body 12 has a planar rectangular shape, the side wall is inclined upward and outward, and the upper opening surface is formed to be larger than the bottom portion. Therefore, the container main body 12 can be nested mutually. The container body 12 is formed as a column 53 by projecting a lower end corner of the side wall 50 below the bottom plate 51. Further, the peripheral frame 15 of the lid 11 is
And a recessed wall 57 is formed by inwardly recessing the space between the support portion 53 and the lower end of the side wall 50 at a height of about ２ from the lower end of the side wall 50. A net portion 18a is formed on the bottom plate 51, and a net portion 59 is formed on the concave wall 57.

The recess wall 57 is recessed inward from the side wall 50 and is formed thicker than the side wall 50.
The upper surface of the concave wall 57 is formed as an inclined surface and is continuous with the inner surface of the side wall 50 (see FIGS. 2 and 11). A locking rib 60 is provided on the outer surface of the column 53. The locking rib 60 is placed on the upper surface of the fitting frame of the lower container when nesting, and regulates the fitting amount. Since the lower end surface of the support portion 53 protrudes from the bottom plate 51, the bottom plate 51 is in a floating state, and the lower surface of the bottom plate 51 can be ventilated even when the stacking is performed.

As shown in FIGS. 3, 4, 17 and 18, the fitting frame 55 has a horizontal portion 61 provided at an upper end portion of the side wall 50 and an outer flange provided downward on the horizontal portion 61. 63. The outer flange 63 is
It is formed by an inclined surface 63a connected to the horizontal portion 61 and a vertical surface 63b connected to the inclined surface 63a. The fitting frame 55 is fitted inside the peripheral frame 15 of the lid 11.

At the four corners of the fitting frame 55, support columns 53 are provided.
The upper end concave portion 65 is formed by cutting out together with the upper end portion of the upper surface. The upper concave portion 65 prevents the lid 11 from shifting in the horizontal direction by fitting the step portion 23 of the lid 11, and the side wall is inclined when receiving a load from above during stacking. Lid 11
To prevent them from expanding.

Further, on the upper surface of the horizontal portion 61, upward grooves 67, 67 for fitting the ridges 25, 25 are provided continuously and in parallel over the entire circumference. The upward grooves 67, 67 are also provided on the side surface of the upper end concave portion 65, and in the illustrated embodiment, are two parallel grooves in accordance with the protrusions 25, 25. The number may be appropriately determined depending on the size of the container body, the weight of the stored items, and the like. Protrusions 2 are provided in the upward grooves 67, 67.
The fitting of 5 and 25 ensures that the tightness between the lid 11 and the container body 12 can be maintained even when the lid 11 is displaced in the horizontal direction.

In the above embodiment, the ridge is provided on the horizontal portion forming the peripheral frame of the lid, and the upward groove for fitting the ridge is formed on the horizontal portion forming the fitting frame of the container body. But,
Conversely, a downward groove may be formed in the horizontal portion of the lid, and a ridge that fits into the downward groove may be formed in the horizontal portion of the container body.

Next, the net section 59 will be described with reference to FIGS. The net portion 59 is formed by attaching a net plate 69 to a fitting hole 70 provided in the concave wall 57. The net plate 69 has substantially the same thickness as the recess wall 57, and has a net 73 at the center thereof.
A fitting groove 77 is provided on the side surface and the lower surface of the peripheral frame portion 75,
A locking portion 79 is provided on the upper part. The net 73 is
The mesh is preferably formed integrally with the frame portion 75, and the size of the mesh is preferably 1.5 mm or less. Also, in order to generate a flow of air throughout the inside of the container, a net portion 59 is required.
Is preferably disposed near the support 53.

The fitting groove 77 is formed by alternately projecting locking pieces 77a and 77b along both surfaces of the frame portion 75, and providing an interval between the two. That is, a predetermined interval is provided between the locking piece 77a and the locking piece 77b in the thickness direction of the frame portion 75, and appears as the fitting groove 77 when the net plate 69 is sectioned.

The upper portion of the frame portion 75 is formed on the same inclined surface 75a as the upper surface of the concave wall 57. The locking portion 79 is provided with the through hole 8.
0 is formed by a locking piece 80a protruding from the lower surface of the "0". As shown in FIG. 9 and FIG.
It protrudes from the surface of the frame part 75 and protrudes upward.

On the other hand, a fitting hole 70 forming the net portion 59 is provided in the recessed wall 57, and a rib 70b fitted in the fitting groove 77 of the net plate 69 is formed on the side surface and the lower surface of the through hole 70a. Are formed. The rib 70b is disposed inward of the side wall 50 in the plane of the container body, and therefore, a gap 70c is formed between the upper end of the rib 70b and the side wall 50.

To form the net portion 59, the gap 7
While inserting the locking piece 77a of the net plate 69 into
The rib 70b may be inserted into the fitting groove 77 and slid downward as it is. When the locking piece 80a slides while being pressed by the side wall 50, and the net plate 69 abuts against the lower end of the through hole 70a, the locking piece 80a returns by a spring action and locks on the upper surface of the through hole 70a. The rib 70b fits into the fitting groove 77, and the net portion 59 is assembled integrally. Since the locking pieces 77a and 77b sandwich the rib 70b and the locking piece 80a is locked on the upper surface of the through hole 70a, the net plate 69 does not come off from the fitting hole 70.

When the net 73 or the like is damaged,
If the locking piece 80a is pressed from the outside to release the locking state with the upper surface of the through-hole 70a and the net plate 69 is slid upward, the net plate 69 can be removed and replaced with a new net plate 69. can do. Thus, although the net plate 69 can be removed inside the container body, it cannot be removed outside, so the lid 11
When the is closed, the net plate 69 cannot be intentionally removed to remove or damage the stored items.

As shown in FIG. 2, the bottom plate 51 of the container body 12 is also provided with a net 18a. Net 1
8a has the same configuration as the net portion 18 of the lid,
This can be applied by replacing 3 with a bottom plate 51. FIG. 16 shows the container body 12 before the net plate is attached.
5 is a perspective view showing the bottom surface of the bottom plate, and the net plate may be attached from the inner surface of the bottom plate 51. FIG. Therefore, description of the net section 18a is omitted to avoid duplication.

Next, another embodiment of the net portion will be described with reference to FIGS. Net part 100
Is formed by attaching the net plate 101 to a fitting hole 103 provided in the top plate 13. Net board 10
1, a net 37a is provided at the center, and a frame 10 around the periphery is provided.
5 is provided with a locking spring 107 protruding therefrom. Both ends of one frame portion 105a in the short direction forming the frame portion 105 are formed as protruding portions 105b protruding from the side surfaces of the frame portion in the longitudinal direction, and the lower surface (the lower part in FIG. The projecting portion 105c protrudes from the lower surface (the lower portion in FIG. 12) of the frame portion.

The locking spring 107 is provided with a concave portion 109 in the frame portion in the longitudinal direction of the frame portion 105 and the concave portion 10.
9 and is formed by projecting a free tip from the side surface of the frame portion in the longitudinal direction. The locking spring 107 has a distal end that opens toward the direction of the protruding portion 105a, and is flexible and exhibits a spring action. The net 3
7a is formed integrally with the frame 105, and the size of the mesh is preferably 1.5 mm or less.

On the other hand, the fitting holes 1 forming the net portion 100
Numeral 03 is formed by providing a fixed frame 111 having an L-shaped cross section in a through hole 110 provided in the top plate 13 so as to protrude outside the top plate. The fixed frame 111 is formed in a substantially U-shaped plane so as to open one side, and a through hole 111a is provided at an end in the longitudinal direction, and a part of the top plate 13 is formed within the range of the through hole 111a. Into the inside of the through hole 110
b. Further, on the inner side surface of the open end of the fixed frame 111, there is provided a concave portion 111c in which the locking spring 107 is fitted and locked. The open end of the fixed frame 111 serves as an insertion port into which the net board 101 is inserted.

In the above configuration, when the net plate 101 is inserted and slid from the open end of the fixed frame 111, the frame 105 of the net plate 101 is moved between the fixed frame 111 and the locking piece 111b. Into the frame 105
The projections 105b and 105c at both end portions of FIG. At this time, the locking spring 107 slides while being pressed against the inner surface of the fixed frame 111, and the recessed portion 111.
When fitted in the inside of c, the tip of the locking spring 107 is opened and locked on the inner surface of the concave portion 111. In this manner, the net plate 101 is inserted into the fixed frame 111 and assembled by simply sliding it.

The net plate 101 does not slip out of the top plate by the frame 105, and the locking pieces 111b
Also, the protrusions 105b and 105c of the frame 105 are locked so that they do not fall inward. Further, the locking spring 107 of the net plate 101 is locked on the inner side surface of the frame portion 105 and cannot be operated from the outside, so that the net plate 101 cannot be removed from the outside of the top plate. On the other hand, when the net plate 101 such as the net 37a is damaged, the locking spring 107 and the recess
It is only necessary to release the locked state with 11c, slide it out, and take it out of the fixed frame 111.

FIG. 16 shows a bottom plate 51 of the container body 12.
2 shows a fitting hole 103a that forms the net portion 100a provided in FIG. The net portion 100a has the same configuration as the net portion 100 of the lid, and can be applied by replacing the top plate 13 with the bottom plate 51. The embodiment shown in FIG. 16 differs only in that reinforcing ribs 113 are provided vertically and horizontally on the lower surface of the bottom plate 51. Therefore, description of the net unit 100a is omitted to avoid duplication.

Next, the structure of the container body for sealing the lid 11 will be described. Fixing projections 81 are provided on the outer flange 63 in the longitudinal direction of the fitting frame 55. The fixing projections 81 are fitted into the fixing holes 27 provided on the outer flange 21 of the lid, thereby preventing the lid 11 from expanding and maintaining a sealed state.
When removing the lid 11, as shown in FIG. 4, the fitting state with the fixing projection 81 may be released while hanging a finger on the lower end of the outer flange 21 of the lid and pulling it outward.

FIG. 17 is a schematic view showing a binding part 83 for an insullock acting integrally with the binding part 28 for an insullock of the lid 11.
Is provided. The bundling portion 83 includes an outer flange 6
Slit 85 for inserting the band portion of Insulok in 3
And the lower part of the slit 85 is formed as a binding plate 87. It is preferable that the binding plate 87 is formed by cutting out the inner surface of the outer flange 63 below the slit 85 by substantially the thickness of the band of the insulok. In this manner, by notching the band approximately by the thickness of the band, the inner surface of the outer flange 63 can be made substantially flush with the inner surface of the outer flange 63 when the insulator is attached.

Further, the outer flange 63 of the container body 12
Is provided with a sealing sticking portion 89 for sealing. As shown in FIG. 2 and FIG.
It is formed by extending to the lower end of the outer flange 63 and protruding outward by the thickness of the outer flange of the lid. By projecting the surface of the sealing sticker 89, the sealing sticker 89 and the outer flange 21 of the lid are substantially flush with each other when the lid is attached, so that the sealing sticker is attached. Can be.

The bundling part 30, the bundling part 87 and the sealing sticking part 89 may be provided not only at one place but also at a plurality of places. Further, depending on the type of the storage item and the use of the returnable box, it is possible to omit one or both of the binding portion and the seal attaching portion as appropriate.

Next, referring to FIGS. 14 and 15, a method of using the tie plate for an insulated lock will be described. FIG. 15 shows an example of the Insulok band. Band 90
Is made of plastic and has a buckle portion 91 provided with a flexible band portion 93 extending therefrom. A claw 91 for preventing the band portion from sliding in the opposite direction is provided inside the buckle portion 91.
a groove 93a is formed on one surface of the band portion 93 so as to be engaged with the pawl 91a, and the ribs 9 are provided so as to be securely fastened.
3b is projected.

By the band 90 having the above structure, the binding portion 2
In order to unite the binding plate 30 of FIG. 8 and the binding plate 87 of the binding portion 83 integrally, the lid 11 is attached to the container body and the binding plate 3
After aligning the binding plate 87 with 0, the band portion 93 may be inserted from the slits 29 and 85, and further passed through the buckle portion 91 and fastened. At this time, if the ribs 93b are brought into contact with the lower end surfaces of the binding plates 30, 87, they can be tightened without loosening.

The band portion 93 slides in the buckle portion 91 in the tightening direction, but does not slide in the reverse direction because the pawl 91a is locked in the groove 93a. Cannot be removed. Therefore, during transportation and storage,
It can be prevented from being opened by a third party without any reason. In addition, depending on the type of storage items and the use of the return box,
Instead of Insulok, a tape-shaped sealing seal,
Alternatively, it can be used together with Insulok.

FIG. 17 is a front view showing the outline of stacking. In the plastic return box 10, the lower end of the column 53 protrudes from the bottom plate 51 even when stacked, and the bottom plate 51 is in a raised state, so that air permeability from the bottom surface can be secured. Also,
Since the net portion of the bottom plate and the lid is provided from the center, air permeability in the vertical direction is improved, and a pressure difference is generated between the bottom plate and the lid due to the chimney effect. Is introduced to create a flow of air throughout the interior of the container.

[0052]

As is apparent from the above description, according to the plastic returnable box of the present invention, the net portion has a structure in which the net plate having the net formed in the center is attached to the fitting hole. It can be replaced if it is damaged. Also, since the attachment of the net plate is performed from the inside of the lid and the inside of the container body, it cannot be removed from the outside. Therefore, there is no intentional removal or damage to stored items by a third party during transportation or storage. In addition, since the lower end of the strut protrudes from the bottom plate, ventilation from the bottom surface is ensured, and a permeable net is also provided on the side wall surface, so that convection occurs throughout the inside of the container body and storage is possible. When the object is a fruit or vegetable such as a vegetable, freshness can be maintained. In addition, in the case of stacking, the lower end of the support portion is placed in the peripheral frame of the lid so that the load does not collapse. In the case of nesting, the height can be suppressed to about 50%. The volume can be reduced when collecting empty boxes.

[Brief description of the drawings]

FIG. 1 is a perspective view of a plastic return box according to the present invention.

FIG. 2 is a perspective view of the container body with a lid removed.

FIG. 3 is an enlarged sectional view showing a fitting state of a peripheral frame of a lid and a fitting frame of a container body.

FIG. 4 is an explanatory sectional perspective view showing a method for removing the peripheral frame from the fitting frame.

FIG. 5 is a cross-sectional perspective view showing a sealing portion in a peripheral frame.

FIG. 6 is an explanatory perspective view showing a net portion of a lid and a bottom plate before assembling.

FIG. 7 is a sectional view of a net plate forming a net portion;
(A) is a sectional view taken along the line AA of FIG. 6, and FIG.
It is a line sectional view.

FIG. 8 is an enlarged sectional view of a main part of a net portion.

FIG. 9 is an enlarged sectional view of a main part of a net portion on a side wall.

FIG. 10 is a perspective view of a net plate.

FIG. 11 is an enlarged perspective view of a main part of a fitting hole forming a net portion of a side wall.

FIG. 12 is a perspective view showing an example of a band.

FIG. 13 is an enlarged sectional view of a main part of a net portion on a side wall.

FIG. 14 is a perspective view of a net plate.

FIG. 15 is an enlarged perspective view of a main part of a fitting hole forming a net portion of a side wall.

FIG. 16 is a perspective view of a main part showing a bottom surface of the container body.

FIG. 17 is a sectional perspective view showing a binding portion of the fitting frame.

FIG. 18 is a sectional view of a main part showing a sealing sticking portion of the fitting frame.

FIG. 19 is an explanatory cross-sectional view showing a state in which a binding plate is tightened by a band in a binding portion for an insulin lock;

FIG. 20 is a perspective view showing an example of a band.

FIG. 21 is a perspective view of a main part showing a bottom surface of the container body.

FIG. 22 is an explanatory front view schematically illustrating stacking.

FIG. 23 is an explanatory perspective view of a conventional cardboard box.

FIG. 24 is an explanatory front view showing the flow of air when conventional cardboard boxes are stacked.

[Explanation of symbols]

 10: Plastic return box 11: Lid 12: Container body 13: Top plate 15: Peripheral frame 16 Reinforcement groove 18, 18a: Net portion 19: Inner flange 20: Horizontal portion 21: Outer flange 21a: Inclined surface 21b: Vertical surface 23: step portion 25: ridge 27: fixing hole 28: binding portion 29: slit 30: binding plate 31: net plate 33: fitting hole 33a: through hole 33b: step portion 33c: protection frame 37: net 39: Frame part 40: Locking part 40a: Through hole 40b: Frame for locking piece 40c: Locking piece 50: Side wall 51: Bottom plate 53: Support part 55: Fitting frame 57: Concave wall 59: Net part 60: Locking rib 61: Horizontal portion 63: Outer flange 63a: Inclined surface 63b: Vertical surface 65: Recess 67: Groove 69: Net plate 70: Fitting hole 71: Flat plate 73: Net 75: Frame portion 77: Upward groove 77a 77b: Locking piece 79: Locking part 80: Through hole 80a: Locking piece 81: Fixing projection 83: Bundling part for insulation lock 85: Slit 87: Bundling plate 89: Seal sticking part for sealing 90: Band 91: Buckle part 93: Band part 100: Net part 101: Net plate 103: Fitting hole 105: Frame part 107: Locking spring 109: Concave part 110: Through hole 111: L-shaped cross section fixed frame 111a: Through hole 111b: Stop 113: Reinforcement rib

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Yukio Yonekura, Inventor 6-2, Sanbancho, Chiyoda-ku, Tokyo Dole Corporation (72) Takami Yamada 2-2-18 Shiba Park, Minato-ku, Tokyo IFCO Inside Japan Co., Ltd. F-term in headquarters factory (reference) 3E006 AA02 BA02 CA01 DA04 DB03 HA10 3E035 AA11 BA01 BB02 BD01 CA02 CA06 3E067 AA11 AB09 AC03 BA05A BB14A BC06A EE50 GA03 GD01

Claims (7)

[Claims] 1. A lid comprising: a lid; and a container body for detachably fitting the lid to an upper opening, a net portion is provided on a top plate of the lid, and the container body is nested. A plastic return box, wherein a side wall is inclined upward and outward so that nesting is possible, lower ends of four pillars protrude from a bottom plate, and a net portion is provided on the bottom plate and the side wall. 2. The net portion is formed by attaching a net plate having a net to a fitting hole from the inside, the net portions of the top plate and the bottom plate are disposed closer to the center, and the net portions of the side walls are formed at four corners. The plastic return box according to claim 1, wherein the return box is disposed near the support portion. 3. The net portion of the top plate and the bottom plate is formed by attaching the net plate to a fitting hole provided in the top plate or the bottom plate. The frame portion has a front end projecting from a side surface of the frame portion, and a flexible locking spring is protrudingly provided. The fitting hole is a through hole provided in a top plate or a bottom plate. A fixed frame having an L-shaped cross section is provided in a substantially U-shaped plane around the periphery of the hole, and a locking piece projecting inward is provided on a part of the peripheral surface of the through hole. The plastic return box according to claim 1 or 2, further comprising a concave portion into which the locking spring of the net plate is fitted. 4. The net portion of the top plate and the bottom plate is formed by attaching the net plate to a fitting hole provided in the top plate or the bottom plate. A locking portion is provided on the frame portion, and the locking portion is provided on one side with a locking piece frame that is flush with an inner surface of a through hole provided at an appropriate position of the frame portion. The locking frame is provided with an outwardly facing locking piece protruding toward the frame within the range of the through hole, and the fitting hole is formed on an inner surface of a peripheral edge of the through hole provided in the top plate or the bottom plate. And a step for fitting the net plate is provided on the outer surface of the top plate or the bottom plate at the periphery of the through hole.
Or the plastic return box according to claim 2. 5. The net portion of the side wall is formed by attaching a net plate to a fitting hole of a concave wall formed by indenting a lower end portion of the side wall inward, and the net plate is provided at a central portion thereof. Is provided, a fitting groove is provided on the side surface and the lower surface of the frame portion, a locking portion is provided on the upper portion, and the locking portion is formed by projecting a locking piece upward from the lower surface of the through hole, The fitting hole is provided with a rib that fits into the fitting groove of the net plate on a side surface and a lower surface of the through-hole provided in the recess wall, and the rib is located more inward of the container body than the side wall in a plane. The plastic return box according to any one of claims 1 to 4, which is provided. 6. The fitting grooves on the side surface and the lower surface of the net plate alternately protrude locking pieces along both surfaces of the frame portion, and between the different locking pieces in the thickness direction of the frame portion. The plastic return box according to claim 5, wherein the return box is formed by providing a predetermined interval. 7. The mesh size of the net is 1.5 mm.
7. The method according to claim 1, wherein:
Plastic return box as described in section.