JP2015147603A - cargo container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air container which is light in weight, is excellent in strength, rigidity and flame-resistance and is inexpensive.SOLUTION: Each exterior panel 200 which constitutes an air container includes a planar substrate 210 formed from resin of honeycomb shape and aluminum foils 220, 230 which are tightly adhered onto both front and back surfaces of the planar substrate 210. A bending load applied to the planar substrate 210 can be converted to a tensile load of the aluminum foil 220 or 230 and therefore, an adequate strength for the bending load can be obtained. Further, the aluminum foils 220, 230 are provided on both front and back surfaces, so that the exterior panel is extremely light in weight, is inexpensive and has excellent flame resistance.

Description

  The present invention relates to a cargo container that accommodates transport cargo. The present invention can be applied to, for example, an air container used for freight transportation by aircraft.

  Generally, a container is used when freight is transported by an aircraft or the like. For example, in the case of aircraft transportation, cargo is loaded into an air container and is carried into an aircraft cargo compartment. When the aircraft arrives at the destination, the cargo is taken out from the air container after the air container is unloaded from the cargo compartment.

  Conventionally, as an air container, what was assembled using metal panels, such as aluminum, and a metal frame body from the request | requirement of bending strength, a flame retardance, etc. was common. For this reason, in the conventional air container, the weight of the container itself was very large. In aircraft transportation, since the weight per container is limited, if the weight of the air container itself is large, the weight of the cargo that can be loaded is reduced accordingly.

  On the other hand, paragraphs [0017]-[0018] of Patent Document 1 below disclose a technique for assembling a cargo container using a plastic cardboard panel. According to the freight container of patent document 1, while being able to reduce the weight of container itself, heat insulation performance can be improved.

JP 2000-255679 A

  However, a panel made of plastic corrugated board has a drawback that its performance such as bending strength and flame retardancy is inferior to that of a metal panel.

  Further, in the freight container of Patent Document 1, a plastic corrugated panel is used as a bottom plate, but the bottom plate needs to have a sufficiently large strength against the load of the cargo. There are disadvantages that manufacturing and handling are inconvenient, and that the unit price of freight containers increases.

  Therefore, an object of the present invention is to provide an air container that is lightweight and excellent in strength, rigidity, and flame retardancy at low cost.

  In order to solve such a problem, the invention of claim 1 is a freight container assembled using a plurality of panel members, and at least one of the plurality of panel members is formed of a resin hollow structure. A freight container comprising: a plate-like base material; and aluminum foil adhered to both front and back surfaces of the plate-like member.

  The invention of claim 2 is characterized in that, in addition to the structure of claim 1, the thickness of the plate-like substrate is 8 millimeters or more and 15 millimeters or less.

  The invention of claim 3 is characterized in that, in addition to the structure of claim 1 or 2, the thickness of the aluminum foil is 0.1 millimeter or more and 0.2 millimeter or less.

  Invention of Claim 4 is provided with the floor panel and the side part and ceiling part which were assembled using the said panel material in addition to the structure in any one of Claims 1 thru | or 3, A floor panel substrate having a thickness of 12 mm or more and 15 mm or less formed by a resin hollow structure; and an aluminum thin plate having a thickness of 0.5 mm or more in close contact with both front and back surfaces of the floor panel substrate; It is characterized by providing.

  According to the first aspect of the present invention, the bending load applied to the plate-like substrate is converted into the tensile load of the aluminum foil by bringing the aluminum foil into close contact with both surfaces of the plate-like substrate of the resin hollow structure. Therefore, sufficient strength against bending load can be obtained.

  In addition, since the panel material is configured using the resin hollow structure and the aluminum foil, it is very lightweight and inexpensive.

  Furthermore, since both front and back surfaces of the plate-like substrate are covered with aluminum foil, the flame retardancy is excellent.

  According to the invention of claim 2, by setting the thickness of the plate-like base material to 8 mm or more and 15 mm or less, sufficient strength of the panel material can be ensured, and it is very lightweight and inexpensive.

  According to the invention of claim 3, by making the thickness of the aluminum foil 0.1 mm or more and 0.2 mm or less, it is possible to secure sufficient strength of the panel material, and it is very light and inexpensive.

  According to the invention of claim 4, since the aluminum thin plate is brought into close contact with both surfaces of the plate-like substrate of the resin hollow structure, the bending load applied to the floor panel substrate is converted into the tensile load of the aluminum thin plate. Therefore, it is possible to obtain a strength higher than that of the panel material, thereby suppressing deformation of the floor panel when a very large load is applied to the floor panel. Furthermore, wear and damage to the floor panel can be sufficiently suppressed by using the aluminum thin plate. In addition, since the aluminum thin plate is in close contact with both surfaces of the plate-like substrate of the resin hollow structure, it is lightweight and inexpensive, and is excellent in flame retardancy.

It is a perspective view which shows roughly the whole structure of the cargo container which concerns on Embodiment 1 of this invention. It is a disassembled perspective view which shows typically one structural example of the panel material which concerns on the same Embodiment 1. FIG. It is a disassembled perspective view which shows typically the other structural example of the panel material which concerns on the same Embodiment 1. FIG. It is a figure which shows the method and result of a strength test of the panel material which concerns on the same Embodiment 1, (a) is a schematic diagram, (b) is a table | surface.

Embodiment 1 of the Invention
Hereinafter, Embodiment 1 of the present invention will be described taking the case where the present invention is applied to an air container as an example.

  FIG. 1 is a schematic perspective view of an air container according to the first embodiment.

  As shown in FIG. 1, the air container 100 of the first embodiment includes a base pallet 110. The base pallet 110 includes a base frame material 110 and a floor panel 111.

  The dimensions of the base pallet 110 are, for example, a width in the left-right direction of about 1500 mm, a width in the front-rear direction of about 1500 mm, and a height of about 140 mm. The base pallet 110 includes a base frame material 111 made of, for example, aluminum. A substantially rectangular floor panel 112 is fixed to the upper surface side of the base frame material 111. The configuration of the floor panel 112 will be described later.

  Further, fork entries 113 and 114 are formed in the side surface of the base frame material 111. These fork entries 113 and 114 are inserted with the forks of the forklift when the air container 100 is lifted by a forklift (not shown).

  On the base pallet 110, the wall part, the ceiling part, and the cover part of the air container 100 are assembled using a plurality of exterior panels 121-127.

  A substantially rectangular right side panel 121 is disposed substantially vertically on the right side surface of the air container 100. The dimensions of the right side panel 121 are, for example, a width of about 1500 mm and a height of about 1500 mm.

  On the other hand, two left side panels 122 and 123 are disposed on the left side surface of the air container 100. Among these, the lower left side panel 122 is formed in a substantially rectangular shape, and is disposed in a state inclined upward from the floor panel 110 by a predetermined angle. The dimensions of the lower left side panel 122 are about 1500 mm in width and about 700 mm in length in the height direction (the height in the vertical direction when installed obliquely is about 400 mm).

  The upper left side panel 123 formed in a substantially rectangular shape is disposed substantially vertically on the upper end side of the lower left side panel 122. The upper left side panel 122 has a width of about 1500 mm and a height of about 1100 mm.

  Two rear panels 124 and 125 are disposed on the back of the base pallet 110. The right rear panel 124 is formed in a substantially rectangular shape, and is disposed substantially vertically on the base pallet 110. The dimensions of the right rear panel 124 are, for example, a width of about 1500 mm × a height of about 1500 mm.

  The left rear panel 125 is formed in a substantially trapezoidal shape and is disposed so as to close the rear side opening surrounded by the right rear panel 124 and the left side panels 122 and 123. The left rear panel 125 has a maximum width of about 500 mm and a height of about 1500 mm.

  On the other hand, a substantially trapezoidal front panel 126 is disposed on the front surface of the air container 100 so as to face the left rear panel 125. The front panel 125 has a maximum width portion of about 500 mm and a height of about 1500 mm.

  Further, a top panel 127 is disposed substantially horizontally on the ceiling portion of the air container 100. The dimensions of the top panel 127 are, for example, a width in the left-right direction of about 2000 mm and a width in the front-rear direction of about 1500 mm.

  The joint portions between the end sides of the panels 121 to 127 are fixed to each other by a frame material 161 made of, for example, aluminum.

  Further, a corner protective material 162 made of, for example, a synthetic resin is fitted into each of the portions where the corner portions of the three panels are joined.

  In addition, a lid 130 is disposed on the entire opening of the air container 100. The lid member includes two lid panels 131 and 132 that are foldably connected. The upper lid panel 131 is connected to the top panel 127 so as to open to the outside of the air container 100 and be placed on the upper surface of the top panel 127 by a rotary connector (such as a hinge) (not shown). On the other hand, the lower lid panel 132 is coupled to the upper lid panel 132 by a coupling tool (such as a hinge) (not shown) so that the lower lid panel 132 can be rotated in the opposite direction to the upper lid panel 131. . With such a configuration, when the lid 130 is opened, the lid panels 131 and 132 can be folded and placed on the top surface of the top panel 127.

  The lower lid panel 132 includes a pair of lock mechanisms 133 and 133. The lock mechanisms 133 and 133 can prevent the lid panel 130 from being opened due to vibration or impact.

  As the panels 121 to 127 and the cover panels 131 and 132, the “panel material” of the present invention is used. On the other hand, the floor panel 112 is used as the “floor panel” of the present invention.

  FIG. 2 is an exploded perspective view schematically showing one configuration example of the panel material according to the first embodiment.

  As shown in FIG. 2, the panel material 200 according to the first embodiment includes a plate-like substrate 210 and aluminum foils 220 and 230.

  The plate-like substrate 210 is formed of a honeycomb-shaped resin as a “resin hollow structure”. The thickness of the plate-like substrate 210 is desirably 8 to 15 mm, for example. In addition, the material of the plate-like substrate 210 is, for example, polypropylene.

  Aluminum foils 220 and 230 are in close contact with both front and back surfaces of the plate-like member 210, respectively. The aluminum foil is a rolled aluminum material having a thickness of 0.006 mm to 0.2 mm according to JIS standards. As a result of the study by the present inventors, the thickness of the aluminum foils 220 and 230 is preferably 0.1 to 0.2 mm.

  In addition, as the floor panel 110, an aluminum thin plate adhered to both front and back surfaces of a honeycomb-shaped resin plate base material similar to that in FIG. 2 was used. For the floor panel 110, the thickness of the resinous plate-like base material is desirably 12 to 15 mm, for example, and the thickness of the aluminum thin plate is desirably 0.5 mm or more. For example, polypropylene can be used as the material of the resin plate-like base material.

  When the aviation container 100 having the dimensions as described above was produced using the panel material 200 of FIG. 2, the overall weight of the aviation container 100 was about 89 kg, which could be reduced by about 60 kg compared to the conventional case. .

  FIG. 3 is an exploded perspective view schematically showing another configuration example of the panel material according to the first embodiment.

  As shown in FIG. 3, the panel material 300 according to the first embodiment includes a plate-like substrate 310 and aluminum foils 220 and 230.

  The plate-like substrate 310 is formed of plastic corrugated cardboard as a “resin hollow structure”. The thickness of the plate-like substrate 310 is, for example, 8 to 15 mm.

  Aluminum foils 220 and 230 are in close contact with both front and back surfaces of the plate-like member 210, respectively. The thickness of the aluminum foil is the same as that of the panel material 200 of FIG.

  Further, as the floor panel 110, a plastic corrugated plastic plate-like substrate similar to that shown in FIG. In the floor panel 110, it is desirable that the thickness of the resin plate-like base material is, for example, 12 to 15 mm, and the thickness of the aluminum thin plate is 0.5 mm or more. For example, polypropylene can be used as the material of the resin plate-like base material.

  Next, the strength test method and result of the air container 100 according to the first embodiment will be described with reference to FIG. Here, the strength test method and results for the rear panels 124 and 125 will be described.

The strength test of the rear panels 124 and 125 is performed as follows.
(1) First, cargo is loaded on the air container 100. The conditions for loading cargo are as follows.

a. The height of the center of gravity is 863 mm or less from the floor surface b. The deviation of the center of gravity in the horizontal direction in FIG. 4 is ± 153 mm or less from the center of the floor c. The deviation of the center of gravity in the front-rear direction in FIG. 4 is ± 156 mm or less from the center of the floor surface d. When the air container 100 is inclined 45 ° (± 5 °) to the back side, a load (including the weight of the air container 100) of 1588 kg or more is applied in the direction perpendicular to the back surface and the floor surface.
(2) Next, the air container 100 is inclined 45 ° (± 5 °) to the back side, and the amount of deflection (unit: millimeter) of the rear panels 124 and 125 at that time is measured.
(3) After inclining the air container 100 for 3 seconds, the inclination angle is returned to 0 °, and the amount of deformation at this time (unit is millimeter) is measured.

  If the values of the deflection amount and the deformation amount are such that they do not interfere with the safe operation of the aircraft, the strength test is passed.

  In the first embodiment, cargo is loaded on the air container 100 in a state satisfying the conditions a to c. The weight of the air container 100 at this time was 2275 kg (the weight of the cargo was 2186 kg, and the weight of the air container 100 was 89 kg). And this air container 100 was inclined 44.5 degrees in the back direction. Therefore, the vertical load of the air container 100 is 2275 kg × sin 44.5 = 1595 kg on both the back surface and the floor surface, which satisfies the above condition d.

  And the deflection amount was measured about the measurement points P1-P6 of Fig.4 (a).

  Further, after 3 seconds, the inclination was returned to 0 °, and the deformation amount was measured at the measurement points P1 to P6.

  The measurement results of the deflection amount and the deformation amount are shown in FIG.

  As can be seen from FIG. 4B, the maximum value of the deflection when tilted by 44.5 ° was 38 mm at the measurement point P5. This amount of deflection is within a range that does not hinder the safe operation of the aircraft.

  Further, the maximum deformation after returning the inclination to 0 ° was 15 mm at the measurement point P6. This amount of deformation is also harmless for aircraft operation.

  Thereafter, the right side surface (right side panel 121), left side surface (left side panels 122, 123), front surface (front panel 126 and lid panels 131, 132), and ceiling surface (top panel 127) of the aviation container 100 are also shown. The strength test was performed according to the conditions defined for each surface. As a result, we obtained test results for all aspects that would not interfere with aircraft operation.

  Thus, according to this Embodiment 1, sufficient intensity | strength of the air container 100 was able to be ensured.

  As described above, according to the panel material of the first embodiment, the aluminum foils 220 and 230 are in close contact with both the front and back surfaces of the honeycomb-structure or plastic corrugated plate-like base materials 210 and 310. The bending load applied to the plate-like substrates 210 and 310 can be converted into the tensile load of the aluminum foil 220 or 230, and thus sufficient strength against the bending load can be obtained.

  Further, since the panel material 200 is configured using the plate-like base materials 210 and 310 and the aluminum foils 220 and 230, it is very lightweight and inexpensive.

  Furthermore, since both the front and back surfaces of the plate-like base materials 210 and 310 are covered with the aluminum foils 220 and 230, the flame retardancy is excellent.

  In addition, since the floor panel 112 according to the first embodiment can convert the bending load applied to the floor panel base material into the tensile load of the aluminum thin plate, it can obtain a very large strength against the bending load. It is lightweight and inexpensive, and has excellent flame retardancy.

100 Air Container 110 Base Pallet 111 Base Frame Material 112 Floor Panel 113,114 Fork Entry 121-127 Exterior Panel (Panel Material)
130 Lid 131,132 Lid panel (panel material)
133 Locking mechanism 161 Frame material 162 Corner protection material 200,300 Panel material 210,310 Plate base material 220,230 Aluminum foil

Claims (4)

A cargo container assembled using a plurality of panel materials,
At least one of the plurality of panel materials is
A plate-like substrate formed of a resin hollow structure;
An aluminum foil adhered to both front and back surfaces of the plate-like member;
A freight container characterized by comprising:   The cargo container according to claim 1, wherein the thickness of the plate-like substrate is 8 mm or more and 15 mm or less.   The cargo container according to claim 1 or 2, wherein a thickness of the aluminum foil is not less than 0.1 millimeters and not more than 0.2 millimeters. A floor panel, and a side part and a ceiling part assembled using the panel material,
The floor panel
A floor panel substrate having a thickness of 12 mm or more and 15 mm or less, formed by a resin hollow structure;
An aluminum thin plate having a thickness of 0.5 mm or more, which is in close contact with both front and back surfaces of the floor panel substrate;
The freight container according to any one of claims 1 to 3, further comprising:

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