JP4562262B2 - Plastic returnable boxes - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a plastic return box made up of a lid and a container body, and more particularly to a plastic return box in which the container body and the lid can reliably maintain a sealed state.
[0002]
[Prior 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 mango and other fruits, insects and insects can be prevented from entering, and air transport must be ensured for cooling in the hold during sea transport. Therefore, conventionally, a cardboard box having a structure as shown in FIG. 23 is used.
[0003]
The corrugated cardboard box 1 is formed by connecting a bottom 3 and a cover 4 to a side wall 2, and the bottom 3 and the cover 4 are respectively provided with four bottom plates 3 a to 3 d and cover plates 4 a to 4 d connected from the side walls. And are formed by folding the bottom plates 3a to 3d and the cover plates 4a to 4d, respectively. The bottom plates 3a to 3d and the cover plates 4a to 4d are provided with insect-proof nets 3e and 4e for ensuring air permeability inside and outside the box and preventing insects and insects from entering.
[0004]
When the bottom plates 3a to 3d are folded, the insect nets of the overlapping bottom plates are coincident, and when the lid plates 4a to 4d are folded, the insect nets of the overlapping lid plates are coincident, and the bottom 3 has four places, the lid Four insect repellent nets are arranged in the part 4. The insect nets 3e of the bottom plates 3a to 3d and the insect nets 4e of the lid plates 4a to 4d are configured to coincide with each other in the vertical direction. The area of the insect net when assembled as the cardboard box 1, that is, the area of the insect net of the bottom part 3 and the lid part 4 is formed so as to occupy about 3% with respect to the entire surface area of the cardboard box 1.
[0005]
The corrugated cardboard boxes 1 having the above-described structure containing fruits such as mango are stored in parallel in the hold and stacked in a plurality of stages up and down during sea transportation. 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 through the insect net at the lid, and sequentially goes to the upper cardboard box, so that the fruit is kept at a predetermined temperature. Can be cooled down to. The insect repellent net is a vent for circulating air in the cardboard box in the hold.
[0006]
Therefore, when these cardboard boxes 1 are stacked, as shown in FIG. 24, the insect nets of the bottom portion 3 and the lid portion 4 coincide with each other at four positions in the vertical direction and communicate in the vertical direction. The cardboard box 1 is not completely sealed, and air permeability is secured by the insect net, so that the freshness of the stored fruit can be maintained. The mesh size of the insect-proof net is formed to a size of 1.5 mm or less for insect-control measures, and the cardboard box 1 is a disposable one-way.
[0007]
[Problems to be solved by the invention]
Since 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, the sealing performance is maintained. However, the conventional transportation method using the corrugated cardboard box as described above has the following problems. That is, since the corrugated cardboard has a hygroscopic property, the compressive strength is lowered during transportation, and the lower corrugated cardboard box may be crushed. In particular, there is a greater risk of being crushed by pitching and rolling during marine transportation.
[0008]
In addition, since it is not possible to stack with a gap between the lower box and the upper box, in order to ensure air permeability, the insect net on the bottom and the insect net on the lid must be formed to overlap. I must. Moreover, in order to ensure the strength of the box, the insect net cannot be provided on the side wall. For this reason, air only flows vertically from the bottom to the top of the insect net, and does not convect the entire box.
[0009]
In addition, since the assembly work is complicated and the cardboard box is disposable and cannot be reused, it is discarded as a huge amount of garbage. This has led to the destruction of the global environment due to waste of resources, which has become a major social problem. Also, the cardboard box is not only troublesome to dismantle, but it may cause injury, and when transshipping, the inside is hardly visible, so it is handled messy and results in damage to the stored fruit. Yes.
[0010]
The present invention has been made in view of the above-described present situation, and provides a plastic return box that maintains the quality of stored items such as fruits, is easy to handle, and has excellent transport efficiency and workability. In particular, the present invention provides a plastic return box having excellent sealing performance between the container body and the lid.
[0011]
[Means for Solving the Problems]
  In order to achieve the above object, the present invention is configured as follows. The plastic returnable box according to the present invention comprises a lid and a container body that detachably fits the lid on the upper opening, and the lid has a peripheral frame on the outer periphery of a substantially flat top plate. The peripheral frame is formed by sequentially connecting an inner flange, a horizontal portion, and an outer flange facing upward from the top plate,The outer flange is formed by a downward inclined surface continuously provided in the horizontal portion and a vertical surface continuously provided by the inclined surface, and a step portion in which the horizontal portion and the outer flange are recessed is formed at four corners of the peripheral frame. A fixing hole is formed between the inclined surface and the vertical surface of the outer flange facing the peripheral frame;
The side wall of the container body is inclined upward and outward so that it can be nested in a nesting manner, and an upper part of the side wall is formed with a fitting frame that fits to the peripheral frame of the lid, The fitting frame is formed by sequentially connecting a horizontal portion and an outer flange protruding outward to the upper end portion of the side wall, and the outer flange of the fitting frame has a downward inclined surface and the inclined surface continuously provided in the horizontal portion. Formed on the inclined surface, and fixing protrusions that are fitted into the fixing holes of the lid body are projected from the inclined surface, and the steps of the lid body are formed at the four corners of the fitting frame. The upper end recessed portion into which the portion is fitted is formed, and the lower end corner portion of the side wall of the container body is protruded downward from the bottom plate to form a supporting column portion. It is characterized by that.
[0012]
  LidThe lower surface of the horizontal portion forming the peripheral frame of the rim is formed with ridges or downward grooves including the step portions of the four corners, and the upper surface of the horizontal portion forming the fitting frame of the container body has four corner portions. Upward grooves or ridges that fit into the ridges or downward grooves, including the upper-end concave portion, can be formed. In addition, the outer flange of the lid and the container body is provided with a binding portion for the insulation lock, and the binding portion for the insulation lock of the lid body includes a slit for inserting the band portion of the insulation lock into the outer flange, and a lower portion of the slit. The outer flange of the outer flange of the container body is formed by a notch binding plate, and the container lock portion for the insulation lock is formed by cutting the slit for inserting the band portion of the insulation lock into the outer flange and the inner surface of the outer flange below the slit. It can be formed by a lacking binding plate.
[0013]
  In addition, the lidThe top plate and the bottom plate and recess wall of the container body are provided with net portions, respectively, and the net portion is provided in the fitting hole provided in the top plate of the lid body and the bottom plate and recess wall of the container body, and the fitting hole. It can be set as the structure which consists of a net board attached detachably. The number of the protrusions or grooves is preferably two.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a plastic return box according to the present invention will be described with reference to the illustrated embodiment. The plastic return box 10 includes a lid 11 and a container body 12 and is formed in a substantially planar shape. The plastic returnable box 10 can be stacked by placing the upper container body 12 on the lower lid 11 in a state where the lid 11 is fitted. At this time, the lower lid 11 is formed so as not to expand or break due to an upward load and to maintain hermeticity. The lid body 11 is formed between the lid bodies, and the container body 12 is formed so that nesting can be performed between the container bodies.
[0015]
First, the lid 11 will be described. The lid body 11 is provided with a peripheral frame 15 on the outer periphery of a top plate 13 having a substantially rectangular plane. Reinforcing grooves 16 opening inward are formed in the longitudinal direction of the top plate 13, and net portions 18, 18 to be described later are arranged symmetrically on both sides of the reinforcing groove 16. The net portions 18 are disposed near the center of the top plate 13.
[0016]
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. Therefore, 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. The outer flange 21 is formed by an inclined surface 21a continuous with the horizontal portion 20 and a vertical surface 21b continuous with the inclined surface 21a. In this way, by forming the outer flange with the inclined surface and the vertical surface, the sealing property with the fitting frame is improved.
[0017]
As shown in FIG. 1, step portions 23 are formed at the four corners of the peripheral frame 15. The horizontal portions 20 and the outer flanges 21 are recessed. The step portion 23 is fitted into the upper-end recesses at the four corners of the container main body to securely fit the lid body 11 to prevent horizontal displacement, and when stacked, the lid body 11 is caused by an upward load. Prevents the spread. Further, on the inner surface of the horizontal portion 20, ridges 25, 25 are continuously provided in parallel over the entire circumference.
[0018]
Therefore, the protrusions 25 and 25 are continuously provided also on the inner surface of the step portion 23. 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 protrusions 25 and 25 act so as to reliably maintain the hermeticity with the container body 12 even when the lid 11 is displaced in the horizontal direction.
[0019]
Fixing holes 27 and 27 are provided in the outer flange 21 of the peripheral frame 15.
In the illustrated embodiment, two fixing holes 27 are provided in the longitudinal direction, and the lid 11 is inadvertently expanded by fitting the fixing protrusions of the container body 12. To prevent.
[0020]
In addition, an insulation lock bundling portion 28 is provided on the peripheral frame 15 of the lid 11. As shown in FIGS. 2 and 5, the binding portion 28 is formed by providing the outer flange 21 with a slit 29 for inserting an insulok band portion and forming 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 the thickness of the insulation lock band. In this way, the outer surface is substantially flush with the outer flange 21 when the insulation lock is attached by cutting out the portion of the band approximately.
[0021]
6 to 8 show the configuration of the net unit 18. The net portion 18 is formed by attaching the net plate 31 to the 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 the peripheral frame 39. The net 37 is formed integrally with the frame portion 39, and the size of the mesh is preferably 1.5 mm or less.
[0022]
The locking portion 40 is provided with a through hole 40 a at an appropriate position of the frame portion 39, and a locking piece frame 40 b that is flush with the inner surface of the through hole 40 a on one side of the frame portion 39 along the outer periphery of the net 37. Further, 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 has flexibility and exhibits a spring action.
[0023]
On the other hand, the fitting holes 33 constituting the net portion 18 are provided in parallel on both sides of the reinforcing groove 16. The fitting hole 33 is provided with a step portion 33b for fitting the net plate 31 on the inner surface of the top plate 13 at the periphery of the through hole 33a and a protective frame 33c on the outer surface of the top plate 13 at the periphery of the through hole 33a. It is formed (see FIGS. 6 and 8). In the above configuration, when the net portion 18 is inserted with the net plate 31 from the inside of the fitting hole 33 with the locking piece frame 40b on the outside, the frame portion 39 is fitted to the stepped 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 the locking piece 40c is assembled by locking to the top plate inside the protective frame 33c.
[0024]
The net plate 31 is not pulled out to the outside of the top plate by fitting the frame portion 39 to the stepped portion 33b, and is inward by the locking piece 40c being locked to the top plate in the protective frame 33c. It will not fall out. Moreover, since the outer surface of the locking piece 40c is protected by the protective frame 33c, the locked state is not released by a collision. Further, when the net plate 31 such as the net 37 is damaged, contrary to when assembling, the locking piece 40c is pressed toward the locking piece frame 40b and removed from the through hole 33a, or the locking piece 40c is removed. Only the net plate 31 can be replaced by removing it from the through hole 33a by notching.
[0025]
Next, the configuration of the container body 12 will be described. The container body 12 has a flat 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 with each other. The container body 12 has a lower end corner portion of the side wall 50 projecting downward from the bottom plate 51 to form a column portion 53. Further, a fitting frame 55 that fits to the peripheral frame 15 of the lid 11 is formed on the upper side of the side wall 50, and the space between the lower end of the side wall 50 and the column portion 53 is recessed inward at a height of about ½. The concave wall 57 is formed. A net portion 18 a is formed on the bottom plate 51, and a net portion 59 is formed on the concave wall 57.
[0026]
The concave wall 57 is recessed inwardly of the side wall 50 and is formed thicker than the side wall 50, and 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 ( 2 and 15). A locking rib 60 is provided on the outer surface of the column portion 53. When the nesting is performed, the locking rib 60 is placed on the upper surface of the fitting frame of the lower container to regulate the fitting amount. Since the lower end surface of the support column 53 protrudes from the bottom plate 51, the bottom plate 51 is in a lifted state, and ventilation of the lower surface of the bottom plate 51 is possible even when stacking.
[0027]
As shown in FIGS. 3, 4, 9 and 10, the fitting frame 55 is formed by a horizontal portion 61 provided at the upper end portion of the side wall 50 and an outer flange 63 provided downward on the horizontal portion 61. Has been. The outer flange 63 is formed by an inclined surface 63a provided continuously from the horizontal portion 61 and a vertical surface 63b provided continuously from the inclined surface 63a. The fitting frame 55 is fitted inside the peripheral frame 15 of the lid body 11.
[0028]
At the four corners of the fitting frame 55, an upper end recess 65 is formed by cutting out together with the upper end of the support column 53. The upper-end recess 65 prevents the horizontal displacement of the lid body 11 by fitting the step portion 23 of the lid body 11, and the side wall is inclined when receiving a load from above when stacking. In combination with this, the lid 11 is prevented from expanding.
[0029]
Furthermore, upward grooves 67 and 67 into which the protrusions 25 and 25 are fitted are continuously provided in parallel on the upper surface of the horizontal portion 61 over the entire circumference. The upward grooves 67, 67 are also provided on the side surface of the upper end recess 65. In the illustrated embodiment, the two grooves are two parallel grooves according to the ridges 25, 25. What is necessary is just to determine the number suitably according to the magnitude | size of a container main body, the weight of a stored item, etc. By fitting the protrusions 25, 25 into the upward grooves 67, 67, even when the lid body 11 is displaced in the horizontal direction, the hermeticity between the lid body 11 and the container body 12 can be reliably maintained. .
[0030]
In the above embodiment, a protrusion is provided on the horizontal portion that forms the peripheral frame of the lid, and an upward groove that engages the protrusion is formed on the horizontal portion that forms the fitting frame of the container body. Alternatively, a downward groove may be formed in the horizontal portion of the lid, and a protrusion that fits into the downward groove may be formed in the horizontal portion of the container body.
[0031]
Next, the structure of the container main body for sealing the lid 11 will be described. Fixing protrusions 81 are provided on the outer flange 63 in the longitudinal direction of the fitting frame 55.
The fixing protrusion 81 is fitted into fixing holes 27 and 27 provided in the outer flange 21 of the lid body, thereby preventing the lid body 11 from spreading 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 putting a finger on the lower end of the outer flange 21 of the lid and pulling it outward.
[0032]
As shown in FIG. 12, on the inclined surface 63a of the fitting frame 55,Further, an insulation lock bundling portion 83 is provided which acts integrally with the insulation lock bundling portion 28 of the lid 11. The binding portion 83 is formed by providing the outer flange 63 with a slit 85 for inserting the band portion of the insulation lock, and forming a binding plate 87 below the slit 85. The binding plate 87 is preferably formed by cutting out the inner surface of the outer flange 63 below the slit 85 by the thickness of the band of the insulation lock. In this way, by cutting out approximately the thickness of the band, the inner surface of the outer flange 63 can be made substantially flush with the inner surface when the insulation lock is attached.
[0033]
  Further, a sealing sticker 89 for sealing is provided on the outer flange 63 of the container body 12. The sealing sticker 89 for sealing is shown in FIGS.13As shown in FIG. 4, the outer flange 63 is formed so as to extend to the lower end and protrude outward by the thickness of the outer flange of the lid. By projecting the surface of the sealing sticking part 89 for sealing, when the lid is attached, the sealing sticking part 89 for sealing and the outer flange 21 of the lid are almost flush with each other, and the sealing sticker is stuck. Can do.
[0034]
The bundling portion 28, the bundling portion 83, and the sealing sticker attaching portion 89 are not limited to one place, and may be provided at a plurality of places. In addition, depending on the type of stored item and the use of the returnable box, either one or both of the binding part and the seal sticking part can be omitted as appropriate.
[0035]
  next,FIG.Figure12And figure14Based on this, the usage method of the binding board for insulation locks is demonstrated. An example of an Insulok band15Shown in The band 90 is made of plastic, and is formed by extending a flexible band portion 93 on the buckle portion 91. A claw 91a for preventing the band portion from slipping in the reverse direction is provided in the buckle portion 91, and a groove 93a for engaging with the claw 91a is formed on one surface of the band portion 93. In addition, a rib 93b is provided so as to be securely tightened.
[0036]
In order to integrally bind the binding plate 30 of the binding portion 28 and the binding plate 87 of the binding portion 83 with the band 90 having the above-described configuration, the lid 11 is attached to the container body, and the binding plate 30 and the binding plate 87 are made to coincide. After that, the band portion 93 may be inserted through the slits 29 and 85 and further passed through the buckle portion 91 and tightened. At this time, if the rib 93b is brought into contact with the lower end surfaces of the binding plates 30 and 87, it can be tightened without loosening.
[0037]
The band portion 93 slides in the buckle portion 91 in the tightening direction, but in the reverse direction, the pawl 91a does not slide by engaging with the groove 93a. I can't. Therefore, it can be prevented from being opened by a third party for no reason during transportation or storage. Depending on the type of stored item and the use of the returnable box, a tape-like sealing seal can be used in place of or in combination with the insulation lock.
[0038]
  Next, the net 59 is illustrated.9~ Figure11Based on The net portion 59 is formed by attaching the net plate 69 to the fitting hole 70 provided in the concave wall 57. The net plate 69 has substantially the same thickness as the concave wall 57, and is provided with a net 73 in the center, fitting grooves 77 on the side surface and the bottom surface of the frame portion 75 at the periphery of the net 73, and a lock on the top. A portion 79 is provided. The net 73 is formed integrally with the frame 75, and the size of the mesh is preferably 1.5 mm or less. Further, in order to generate an air flow in the entire interior of the container, the net portion 59 is preferably arranged in the vicinity of the support column portion 53.
[0039]
The fitting groove 77 is formed by alternately protruding locking pieces 77a and 77b along both surfaces of the frame portion 75 and providing a gap therebetween. That is, a predetermined gap is provided in the thickness direction of the frame portion 75 between the locking piece 77a and the locking piece 77b, and it appears as a fitting groove 77 when the net plate 69 is sectioned.
[0040]
  The upper portion of the frame portion 75 is formed on the same inclined surface 75 a as the upper surface of the concave wall 57. The locking portion 79 is formed by a locking piece 80 a protruding from the lower surface of the through hole 80. The locking piece 80a is9And figure10As shown in FIG. 5, the projection protrudes from the surface of the frame portion 75 and projects upward.
[0041]
On the other hand, the fitting hole 70 that forms the net portion 59 is provided in the concave wall 57, and ribs 70b that fit into the fitting groove 77 of the net plate 69 are provided on the side surface and the lower surface of the through hole 70a. Is formed by. 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.
[0042]
In order to form the net portion 59, the locking piece 77a of the net plate 69 may be inserted into the gap 70c, and the rib 70b may be inserted into the fitting groove 77 and slid downward. When the locking piece 80a slides while being pressed by the side wall 50, and the net plate 69 hits the lower end of the through hole 70a, the locking piece 80a is restored by a spring action and locked to the upper surface of the through hole 70a. The rib 70b is fitted 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 to the upper surface of the through hole 70a, the net plate 69 does not come off the fitting hole 70.
[0043]
If the net 73 or the like is damaged, the net plate 69 can be slid upward by pressing the locking piece 80a from the outside to release the locked state with the upper surface of the through hole 70a. Can be removed and replaced with a new net plate 69. Thus, although the net plate 69 can be removed inside the container body, it cannot be removed outside. Therefore, the net plate 69 is intentionally removed while the lid 11 is closed, and the stored items can be taken out. It cannot be damaged.
[0044]
In addition, as shown in FIG. 2, a net 18 a is also provided on the bottom plate 51 of the container body 12. The net part 18 a has the same configuration as the net part 18 of the lid, and can be applied by replacing the top plate 13 with the bottom plate 51. FIG. 16 is a perspective view showing the bottom surface of the container body 12 before the net plate is attached, and the net plate may be attached from the inner surface of the bottom plate 51. Therefore, the description of the net part 18a is omitted to avoid duplication.
[0045]
Next, another embodiment of the net unit will be described with reference to FIGS. The net portion 100 is formed by attaching the net plate 101 to the fitting hole 103 provided in the top plate 13. The net plate 101 is provided with a net 37 a at the center and a locking spring 107 protruding from the peripheral frame portion 105. Both end portions of one frame portion 105a in the short direction forming the frame portion 105 are projecting portions 105b protruding from the side surfaces of the longitudinal frame portion, and the lower surface (lower side in FIG. 17) is in the longitudinal direction. The protrusion 105c protrudes from the lower surface of the frame (lower side in FIG. 17).
[0046]
The locking spring 107 is formed by providing a concave portion 109 in the longitudinal frame portion of the frame portion 105, connecting from the concave portion 109, and protruding a free tip from a side surface of the longitudinal frame portion. ing. The locking spring 107 has a tip that is open toward the protruding portion 105a, has flexibility, and exhibits a spring action. The net 37a is formed integrally with the frame portion 105, and the size of the mesh is preferably 1.5 mm or less.
[0047]
On the other hand, the fitting hole 103 constituting the net part 100 is formed by providing a L-shaped fixing frame 111 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-shape 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 within the range of the through hole 111a. A locking piece 111b is projected from the inside of the through hole 110.
Furthermore, a concave portion 111c for fitting and locking the locking spring 107 is provided on the inner surface of the open side end portion of the fixed frame 111. An open side end of the fixed frame 111 serves as an insertion port for inserting the net plate 101.
[0048]
In the above-described configuration, when the net portion 100 is inserted and slid from the open end of the fixed frame 111, the net portion 101 of the net plate 101 is inserted between the fixed frame 111 and the locking piece 111b. The protrusion 105b and the protrusion 105c at both ends of the frame 105a are assembled by abutting against the open end surface of the fixed frame 111. At this time, the locking spring 107 slides while being abutted against the inner surface of the fixed frame 111 and is fitted into the recess 111c, so that the tip of the locking spring 107 is released and locked to the inner surface of the recess 111. . In this manner, the net plate 101 is assembled by being inserted into the fixed frame 111 and sliding.
[0049]
The net plate 101 does not slip out to the outside of the top plate by the frame portion 105, and does not fall out inward by the locking piece 111b and the protruding portions 105b and 105c of the frame portion 105 being locked. Further, the locking spring 107 of the net plate 101 is locked to the inner side surface of the frame portion 105 and cannot be operated from the outside. Therefore, 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 broken, the locking state between the locking spring 107 and the recess 111c is released from the inside of the top plate, and the slide plate is slid as it is and taken out from the fixed frame 111.
[0050]
FIG. 21 shows a fitting hole 103a constituting the net portion 100a provided in the bottom plate 51 of the container body 12. The net part 100 a has the same configuration as the lid net part 100, and can be applied by replacing the top plate 13 with the bottom plate 51. The embodiment illustrated in FIG. 21 is different only in that reinforcing ribs 113 are provided vertically and horizontally on the lower surface of the bottom plate 51. Therefore, the description of the net unit 100a is omitted to avoid duplication.
[0051]
FIG. 22 is a front view showing an outline at the time of stacking. Even when the plastic returnable box 10 is stacked, the lower end portion of the support column 53 protrudes from the bottom plate 51, and the bottom plate 51 is in a lifted state, so that air permeability from the bottom surface can be secured. Moreover, since the net part of the bottom plate and the lid is provided from the center, the air permeability in the vertical direction is improved, and the differential pressure between the outside and the outside is generated by the chimney effect, so that the net part provided on the side wall Air is taken in from the air and a flow of air is generated throughout the interior of the container.
[0052]
【The invention's effect】
As is apparent from the above description, according to the plastic returnable box according to the present invention, the lid body and the container body have a structure in which the fitting frame of the container body is fitted to the peripheral frame of the lid body. The sealed state can be maintained. In addition, since a groove or a protrusion is provided in the horizontal portion of the fitting frame and the horizontal portion of the peripheral frame so as to be fitted to each other, even when the lid body is displaced in the horizontal direction, There is no gap between them.
[0053]
In addition, stepped portions are formed at the four corners of the lid body, and upper end concave portions are formed at the four corners of the fitting frame of the container body to fit the stepped portion. Is prevented. In addition, a fixing hole is formed in the outer flange forming the peripheral frame of the lid, and the fixing protrusion protruding from the outer flange forming the fitting frame of the container body is fitted into the fixing hole. The body is attached in a sealed state.
[0054]
In addition, the outer flange of the lid and the container body is provided with a binding part that is insulated so that the lid can be prevented from being displaced and sealed, and the lid can be prevented from being intentionally opened by a third party. can do. Moreover, when the sealing sticker attaching part protrudes from the lower end of the outer flange of the container body, it is possible to prevent the lid from being intentionally opened by a third party by sticking the sealing sticker. .
[Brief description of the drawings]
FIG. 1 is a perspective view of a plastic returnable box according to the present invention.
FIG. 2 is a perspective view of a container body with a lid removed.
FIG. 3 is an enlarged cross-sectional view showing a fitted 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 a perspective view for explanation before assembling showing a net part in a lid and a bottom plate.
7A and 7B are cross-sectional views of a net plate forming a net portion, in which FIG. 7A is a cross-sectional view taken along the line AA in FIG. 6 and FIG. 7B is a cross-sectional view taken along the line B-B in FIG.
FIG. 8 is an enlarged cross-sectional view of a main part in a net part.
FIG. 9 is a cross-sectional perspective view showing a binding portion in the fitting frame.
FIG. 10 is a cross-sectional view of a main part showing a sealing sticking portion of a fitting frame.
FIG. 11 is an explanatory cross-sectional view showing a state in which the binding plate is tightened by a band in the binding portion for the insulation lock.
FIG. 12 is a perspective view showing another embodiment of a net plate constituting the net part.
FIG. 13 is a cross-sectional perspective view of a main part viewed from the inside showing another embodiment of a fitting hole constituting the net part.
FIG. 14 is a perspective view seen from the outside of a fitting hole constituting the net part.
FIG. 15 is a cross-sectional perspective view of the net portion in a state in which the net portion is assembled into the fitting hole.
FIG. 16 is a main part perspective view showing another embodiment of the fitting hole in the bottom plate.
FIG. 17 is a perspective view showing an example of a band.
FIG. 18 is an enlarged cross-sectional view of the main part of the net part on the side wall.
FIG. 19 is a perspective view of a net plate.
FIG. 20 is an enlarged perspective view of a main part of a fitting hole forming a net part of a side wall.
FIG. 21 is a perspective view showing a main part of the bottom surface of the container body.
FIG. 22 is an explanatory front view showing an outline at the time of stacking.
FIG. 23 is an explanatory perspective view of a conventional cardboard box.
FIG. 24 is an explanatory front view showing the air flow when stacking conventional cardboard boxes.
[Explanation of symbols]
10: Plastic return box
11: Lid
12: Container body
13: Top plate
15: Perimeter frame
16 Reinforcing groove
18, 18a: Net part
19: Inner flange
20: Horizontal portion
21: Outer flange
21a: inclined surface
21b: vertical plane
23: Step
25: ridge
27: fixing hole
28: Bundling part
29: Slit
30: Bundling plate
31: Net board
33: Fitting hole
33a: Through hole
33b: Stepped portion
33c: Protection frame
37: Net
39: Frame
40: Locking part
40a: through hole
40b: Locking piece frame
40c: locking piece
50: Side wall
51: Bottom plate
53: Supporting part
55: Fitting frame
57: concave wall
59: Net part
60: Locking rib
61: Horizontal part
63: Outer flange
63a: inclined surface
63b: vertical plane
65: Top recess
67: Groove
69: Net board
70: Fitting hole
73: Net
75: Frame
77: Mating groove
77a, 77b: locking pieces
79: Locking part
80: Through hole
80a: locking piece
81: Fixing protrusion
83: Bundling part
85: Slit
87: Binding board
89: Sealing part for sealing
90: Band
91: Buckle part
93: Band part
100: Net part
101: Net board
103: Fitting hole
105: Frame
107: Locking spring
109: Recess
110: Through hole
111: L-shaped fixed frame in cross section
111a: Through hole
111b: locking piece
113: Reinforcement rib

Claims (5)

The lid body and the container body that detachably fits the lid body in the upper opening, the lid body is provided with a peripheral frame on the outer periphery of the substantially flat top plate,
The peripheral frame is formed by sequentially connecting an inner flange, a horizontal portion, and an outer flange that are directed upward from the top plate, and is connected to a downward inclined surface that connects the outer flange to the horizontal portion and the inclined surface. Formed by vertical surfaces to be formed, formed stepped portions with the horizontal portion and the outer flange recessed at the four corners of the peripheral frame, and formed fixing holes across the inclined surface and vertical surface of the outer flange facing the peripheral frame The side wall of the container body is inclined upward and outward so that it can be nested, and a fitting frame that fits the peripheral frame of the lid is formed on the upper side of the side wall. The fitting frame is formed by sequentially connecting a horizontal portion and an outer flange protruding outward at the upper end portion of the side wall, and the outer flange of the fitting frame is a downward inclined surface continuously provided by the horizontal portion. And a vertical surface connected to the inclined surface. Fixing protrusions that are fitted into the fixing holes of the lid are projected on the inclined surface, and upper end recesses are formed at the four corners of the fitting frame to fit the steps of the lid. The plastic body is characterized in that the lower end corner portion of the side wall of the container body protrudes downward from the bottom plate to form a column portion, and the side wall between the column portions is a concave wall with the lower end portion recessed inward. box. On the lower surface of the horizontal part forming the peripheral frame of the lid body, ridges or downward grooves are formed including the step portions at the four corners, and on the upper surface of the horizontal part forming the fitting frame of the container body plastic returnable box of claim 1, wherein the upward groove or ridge that mates with the projection or downward groove including the part of the upper end recess of the corner portion. The lid and the outer flange of the container main body are each provided with a binding portion for the insulation lock. The insulation locking binding portion of the lid body includes a slit for inserting the band portion of the insulation lock into the outer flange, and an outer side below the slit. Formed by a bundling plate with the outer surface of the flange cut out. The bundling portion for the insulation lock of the container body has a slit for inserting the band portion of the insulation lock into the outer flange, and an inner surface of the outer flange below the slit. The plastic return box according to claim 1 or 2, wherein the plastic return box is formed of a binding plate . Nets are provided on the top plate of the lid, the bottom plate of the container body, and the concave wall, respectively, and the net part is fitted with the fitting holes provided in the top plate of the lid, the bottom plate of the container main body and the concave wall, and the fitting The plastic return box according to any one of claims 1 to 3, comprising a net plate that is detachably attached to the hole . 5. The plastic return box according to any one of claims 1 to 4, wherein the number of protrusions or grooves is two .

Images