WO2011030852A1

WO2011030852A1 - Container for cargo

Info

Publication number: WO2011030852A1
Application number: PCT/JP2010/065616
Authority: WO
Inventors: 信孝清水; 公司半谷
Original assignee: 新日本製鐵株式会社
Priority date: 2009-09-11
Filing date: 2010-09-10
Publication date: 2011-03-17
Also published as: KR101354829B1; TW201114665A; CN102482033B; KR20120039064A; JPWO2011030852A1; CN102482033A; TWI417232B

Abstract

The cargo container comprises a corner post having a substantially Ω-shape in a flat sectional view, the corner post being defined by a first connection portion (41), a second connection portion (42), a first projecting surface portion (43), a second projecting surface portion (44), a first side surface portion (45), a second side surface portion (46), and a tip corner portion (40); wherein the relationship among the minimum width (b0), the thickness (t) of the corner post, and the material yield strength (F) of the corner post satisfies b0>740t/(√F), wherein the minimum width (b0) is the minimum width between the width from a first corner portion (40C) where the first connection portion (41) continues to the first projecting surface portion (43) to the second side surface portion (46), and the width from the second corner portion (40D) where the second connection portion (42) continues to the second projecting surface portion (44) to the first side surface portion (45); and the relationship among the maximum width (b), the thickness (t) of the corner post, and the material yield strength (F) of the corner post satisfies b≤740t/(√F), wherein the maximum width (b) is the maximum width between the width of the first side surface portion (45) and the width of the second side surface portion (46).

Description

Cargo container

The present invention relates to a freight container for carrying a loaded cargo by sea and land.
This application claims priority based on Japanese Patent Application No. 2009-210180 filed in Japan on September 11, 2009, the contents of which are incorporated herein by reference.

A freight container that transports freight is mainly made of a metal member such as steel, stainless steel, or aluminum, and is composed of a rectangular parallelepiped box. In addition, the cargo container is loaded with cargo and transported via a transportation means such as a ship, a truck, and a railroad. In recent years, in particular, from the viewpoint of improving the efficiency of global logistics not only in Japan but also around the world, the load resistance performance of cargo containers, overall dimensions, and the shape of the connecting parts with transportation equipment are international standards such as ISO. It is almost common throughout the world. By standardizing and standardizing freight containers under certain rules, compatibility and convenience during transportation are ensured.
By the way, in recent years, from the viewpoint of protecting the global environment, the movement of reducing greenhouse gas emissions is also increasing in the field of logistics, and the weight of transportation means such as ships, trucks, and railroads that carry cargo has been reduced. It is being advanced. Since the freight container is transported by these moving means, reducing the weight of the container itself leads to the overall weight reduction including the moving means, which is more preferable for protecting the global environment. Against this background, there is an increasing demand for weight reduction in freight containers. Here, it is necessary to reduce the weight while ensuring particularly the load resistance performance defined in ISO.

Further, as a form of the cargo container, a rectangular bottom pallet; a pair of side panels and a pair of front and rear panels erected on the four sides of the bottom pallet; A plurality of corner posts connecting the side edges of the side panels and the side edges of the front and rear panels; corner fittings provided at the upper and lower ends of the corner posts; the side panels and the front and rear A freight container provided with a top panel connected to the upper edge of the panel is common. In such a freight container, the cross-sectional shape of the corner post is matched to the cross-sectional shape of the corner fitting as much as possible, and the cross-sectional area of the corner post is made large so that the load against the compressive load when the freight containers are stacked together is reduced. It is designed to ensure the material strength and satisfy the required performance for stacking.

JP 2005-536413 A

However, according to the conventional cargo container, since the cross-sectional area of the corner post has to be increased, the weight is increased accordingly. That is, in order to improve the member yield strength against the compressive load, the cross-sectional area of the corner post must be increased, but there is a problem that the weight increases correspondingly and the demand for weight reduction cannot be met.

An object of the present invention is to provide a freight container capable of improving the stacking performance by securing the member strength while reducing the weight of the corner post and thus the entire freight container.

(1) A freight container according to an aspect of the present invention includes a rectangular bottom pallet; a pair of side panels and a pair of front and rear panels erected on four sides of the bottom pallet; and corners of the bottom pallet A plurality of corner posts installed between the side edges of the side panel and the side edges of the front and rear panels; corner fittings provided at the upper and lower ends of the corner posts; A freight container provided with a side panel and a top panel connected to the upper edge of the front and rear panels, and when the corner post is viewed in a plan view, the side edge of the side panel A first connecting portion connected to the side panel; a second connecting portion connected to a side edge portion of the front and rear panels; and an outer direction continuous to the first connecting portion and intersecting the surface direction of the side panel. Protruding first A projecting surface portion; a second projecting surface portion that is continuous with the second connecting portion and projects outwardly intersecting the surface direction of the front and rear panels; and is provided directly or indirectly on the first projecting surface portion. A first side surface portion extending in the surface direction of the side panel; a second side surface portion provided directly or indirectly on the second projecting surface portion and extending in the surface direction of the front and rear panels; and the first side surface portion and A tip corner portion continuously provided on the second side surface portion; and a substantially Ω shape formed by the first corner portion and the first projecting surface portion from the first corner portion. The width dimension in the vertical direction with respect to the second side surface portion up to two side surface portions, and the first side surface portion from the second corner portion to the first side surface portion where the second connecting portion and the second projecting surface portion are continuous. Of the width dimensions in the vertical direction, at least the minimum width dimension b0 and the corner position The relationship between the thickness t of the strike and the material yield strength F of the corner post satisfies b0> 740 t / (√F), and the width dimension between the first side surface portion and the second side surface portion is: The relationship between at least the maximum width dimension b, the thickness t of the corner post, and the material yield strength F of the corner post satisfies b ≦ 740 t / (√F).

(2) According to the freight container described in (1) above, an inclined side surface portion that is continuous and intersects with both the first side surface portion and the second side surface portion is provided at the tip corner portion; Of the width dimensions of the side surface portion, the first side surface portion, and the second side surface portion, the relationship between at least the maximum width dimension b, the thickness t of the corner post, and the material yield strength F of the corner post is b ≦ It is preferable to satisfy 740 t / (√F).

(3) According to the freight container described in (2) above, it is preferable that a chamfered portion is formed at a corner portion of the corner fitting along the shape of the inclined side surface portion.

(4) According to the freight container described in (1) above, a tip convex curved surface portion formed by a convex curved surface directed outward or a tip curved by a concave curved surface directed inward at the tip corner portion. A concave curved surface portion is preferably provided.
(5) According to the cargo container described in (4) above, it is preferable that a chamfered portion is formed at a corner of the corner fitting along the shape of the tip convex curved surface portion or the tip concave curved surface portion.

(6) According to the freight container described in any one of (1) to (5) above, a third corner portion where the first projecting surface portion and the first side surface portion are continuous, and the second projecting surface portion. And at least one of the fourth corners where the second side surface portion is continuous, an inclined chamfered portion where the corner portion is chamfered with an inclined surface, and the corner portion is chamfered with a convex curved surface facing outward. Any one of a convex chamfered portion and a concave chamfered portion in which the corner portion is chamfered with a concave curved surface directed inward is preferably formed.
(7) According to the freight container according to (6), a chamfered portion is formed at a corner of the corner fitting along the shape of the inclined chamfered portion, the convex chamfered portion, or the concave chamfered portion. Preferably it is.

(8) According to the freight container described in (1) above, the first projecting surface portion is an inclined first projecting surface portion that projects from the first connection portion outward and tilting toward the tip portion. It is preferable that the second projecting surface portion is an inclined second projecting surface portion projecting from the second connection portion outward and tilting toward the tip portion.
(9) According to the freight container described in (8) above, it is preferable that a chamfered portion is formed at a corner of the corner fitting along the shape of the inclined first protruding surface portion and the inclined second protruding surface portion. .

(10) According to the freight container as described in (1) above, the first side surface portion and the second side surface portion are formed with a concave curved surface directed inward at each intermediate position or a refracting surface directed inward. It is preferable that an intermediate bent portion is provided.

According to the freight container described in (1) above, by increasing the material strength of the corner post and reducing the thickness of the corner post, the width b0 of the corner post becomes larger than 740 t / (√F), and the plate Even in corner posts where element buckling is a concern, setting the width dimension b of each face to be 740 t / (√F) or less suppresses buckling of plate elements and ensures member strength against compressive loads. However, the cross-sectional area can be reduced. As a result, the corner post itself can be reduced in weight. be = 740 t / (√F) is an expression representing the effective width be of the plate element that receives the in-plane compressive force. If b ≦ be, the ineffective portion due to local buckling is present in the plate element with respect to the compressive force. It does not occur, and it is possible to efficiently reduce the weight without reducing the effective ratio of the cross section.
By reducing the thickness of the corner post, it is possible to reduce the weight of the corner post itself, leading to a reduction in the weight of the cargo container as a whole, reducing greenhouse gas emissions, and the global environment. It is possible to obtain a suitable configuration from the viewpoint of protection. Furthermore, reducing the cross-sectional area of the corner post contributes to a reduction in material cost, and further reduces the surface area, thereby contributing to a reduction in coating cost.

By the way, when reducing the cross-sectional area of the corner post, it is conceivable to reduce the width dimension b0 while keeping the thickness of the corner post constant, but if the width dimension b0 of the corner post itself is reduced in this way, There will be inconveniences such as the joint between the post and the corner fitting, the side surfaces, and the front and rear panels will change, or it will be out of the international standard size and the compatibility and convenience during transportation will be impaired. .
On the other hand, when the thickness of the corner post is reduced as a means for reducing the cross-sectional area without changing the outer shape of the corner post itself, the thickness t becomes smaller than the width dimension b of each surface portion of the corner post. That is, the width-thickness ratio (b / t) increases. Thereby, the problem of local buckling arises and the problem that the performance with respect to the compressive load at the time of stacking cannot be satisfied arises.
Therefore, among the width dimensions of the first side face part and the second side face part in the corner post, the relationship among at least the maximum width dimension b, the corner post thickness t, and the material yield strength F is b ≦ 740 t / (√F ) (Hereinafter referred to as Expression (1)), the thickness t and the width dimension b of the surface portion are set. Thereby, local buckling can be prevented and the required performance with respect to the compressive load at the time of stacking can be satisfied.

According to the freight container described in (2) above, by providing an inclined side surface portion that intersects and is continuous with both the first side surface portion and the second side surface portion at the tip corner portion, the projected dimension of the inclined side surface portion can be obtained. Therefore, the width dimension b of the first side surface portion and the second side surface portion can be reduced as compared with the freight container described in (1) above. Thereby, the width-thickness ratio (b / t) of the first side surface portion and the second side surface portion can be reduced. Further, even in the inclined side surface portion, by setting the thickness t of the corner post and the width dimension b of each surface portion so as to satisfy the relationship of the formula (1), local buckling can be prevented. The required performance for the compressive load of the entire post can be secured.

According to the freight container described in (3) above, since the chamfered portion is formed in the corner fitting, the cross-sectional area of the corner post is reduced. Thereby, corner fitting itself can also be reduced in weight and the weight reduction of the whole cargo container can be promoted.

According to the freight container described in (4) above, the width dimension b of the first side surface portion and the second side surface portion can be reduced by providing the tip convex curved surface portion or the tip concave curved surface portion at the tip corner portion. it can. Thereby, the increase in the width-thickness ratio (b / t) between the first side surface portion and the second side surface portion can be suppressed, local buckling can be prevented, and the required performance for the compressive load of the entire corner post can be ensured.
According to the freight container described in the above (5), since the chamfered portion is formed in the corner fitting, the sectional area of the corner fitting is reduced. Thereby, corner fitting itself can also be reduced in weight and the weight reduction of the whole cargo container can be promoted.

According to the cargo container described in (6) above, in the third corner and the fourth corner which are corners other than the tip corner, by providing an inclined chamfered portion, a convex chamfered portion, and a concave chamfered portion, The width dimension b of the first side surface portion and the second side surface portion can be reduced. Thereby, the width-thickness ratio (b / t) of the first side surface portion and the second side surface portion can be further suppressed. Here, as for the inclined chamfered portion, it is natural that the relationship between the thickness, the width dimension of the surface portion, and the material yield strength satisfies the above formula (1).
According to the freight container as described in said (7), since the chamfering part is formed in corner fitting, the cross-sectional area of corner fitting becomes small. Thereby, corner fitting itself can also be reduced in weight and the weight reduction of the whole cargo container can be promoted.

According to the freight container described in (8) above, the first projecting surface portion and the second projecting surface portion are respectively the inclined first projecting surface portion and the tilted second projecting surface portion, so that the first side surface portion and The width dimension b of the second side surface portion can be reduced. This also makes it possible to reduce the width-thickness ratio (b / t) between the first side surface portion and the second side surface portion. Even in this case, the relationship between the thickness t and the width dimension b of the inclined first protruding surface portion and the inclined second protruding surface portion and the material yield strength F satisfies the above formula (1).
According to the freight container described in (9) above, since the chamfered portion is formed in the corner fitting, the cross-sectional area of the corner fitting is reduced. Thereby, corner fitting itself can also be reduced in weight and the weight reduction of the whole cargo container can be promoted.

According to the freight container described in (10) above, the width dimension b of each divided side surface portion can be reduced by dividing the first side surface portion and the second side surface portion into left and right by the intermediate bent portion. This also reduces the width-thickness ratio (b / t) between the first side surface portion and the second side surface portion, so that the local buckling strength can be increased.

It is a perspective view of the container for cargo of one embodiment of the present invention. It is an expanded sectional view of the corner post and corner fitting of the same container for cargo. It is an expanded sectional view showing a modification of a corner post. It is an expanded sectional view showing other modifications of a corner post. It is an expanded sectional view showing other modifications of a corner post. It is an expanded sectional view showing other modifications of a corner post. It is an expanded sectional view showing other modifications of a corner post. It is an expanded sectional view showing other modifications of a corner post. It is an expanded sectional view showing a modification of corner fitting. It is an expanded sectional view showing the conventional corner post. It is a figure which shows the FEM analysis result which concerns on the Example of this invention. It is a figure which shows the FEM analysis result which concerns on the comparative example of this invention. It is a graph of the load-deformation relationship of the analysis result in the Example and the comparative example.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
A cargo container 1 to which the present invention is applied is constituted by a box as shown in FIG. 1 and can be loaded with cargo. The freight container 1 is made of a metal such as steel, stainless steel, or aluminum. Since the freight container 1 is assumed to be transported via a transportation means such as a ship, a truck, and a railroad, for example, from the viewpoint of improving compatibility and convenience during transportation, it is based on a standard such as ISO. It is considered to be a specification.

The freight container 1 includes a rectangular bottom pallet (not shown), a pair of side panels 2 and a pair of front and rear panels 3 erected on the four sides of the bottom pallet; A plurality of corner posts 4 connecting between the side edges of the panel 2 and the side edges of the front and rear panels 3; corner fittings 5 provided at the upper and lower ends of these corner posts 4; And a top panel 6 provided to be connected to the upper edges of the front and rear panels 3.

The side panel 2 and the front and rear panels 3 are each installed on a bottom pallet, and

adjacent panels

2 and 3 are connected to each other via a corner post 4. Adjacent side panels 2 and front and rear panels 3 are substantially orthogonal to each other. Further, the side panel 2, the front and rear panels 3, and the top panel 6 are made of corrugated steel plates made of relatively thin steel plates having a thickness of about 1 mm to 2 mm, for example. An opening / closing door (not shown) is provided on any one of the side surface, the front and back surfaces, and the top surface of the cargo container 1, and cargo is loaded into the container from here. For example, when an open / close door is provided on either of the front and rear surfaces, a corner post adjacent to the door may be formed of a grooved steel having a shape different from that of the corner post 4 of the present embodiment. . In such a case, the corner post 4 described later can be applied only to either of the front and rear surfaces. That is, the corner post 4 described later can be applied not only to all four corners of the container but also to any part of the four corners.

Next, the configuration of the corner post 4 applied to the cargo container 1 to which the present embodiment is applied will be described with reference to FIGS. Here, FIG. 2 is a cross-sectional view showing a corner post 4 of a representative form, and FIGS. 3 to 8 are cross-sectional views showing a corner post 4 according to a modification.
In any of the cases shown in FIGS. 2 to 8, the corner post 4 is made of weathering steel, and is formed by bending a steel plate having a thickness t of about 3 mm to 5 mm, for example. A steel material having a material yield strength F of about 550 MPa to 700 MPa is used for the steel plate.

As shown in FIG. 2, when the corner post 4 is viewed in a plan view, a first connection portion 41 connected to the side edge portion of the side panel 2; and a second connection connected to the side edge portion of the front and rear panel 3 A first projecting surface portion 43 projecting in an outward direction (in the figure, leftward in the X direction) continuous with the first connecting portion 41 and intersecting the surface direction of the side panel 2; And a second projecting surface portion 44 projecting outward (in the drawing, downward in the Y direction) intersecting the surface direction of the front and rear panel 3; and provided directly on the first projecting surface portion 43, A first side surface portion 45 extending in the two surface directions; a second side surface portion 46 provided directly on the second projecting surface portion 44 and extending in the surface direction of the front and rear panel 3; a first side surface portion 45 and a second side surface portion. And a tip corner portion 40 continuously provided on 46;

Specifically, the first connection portion 41 is provided in parallel to the surface direction of the side panel 2 (Y direction in the figure: the longitudinal direction of the cargo container 1) and connected to the side panel 2. The second connecting portion 42 is provided in parallel to the surface direction of the front and rear panel 3 (X direction in the figure: the width direction of the cargo container 1) and is connected to the front and rear panel 3.
Further, in the present embodiment, the inclined side surface portion 47 is formed in the tip corner portion 40 so as to intersect and continue both the first side surface portion 45 and the second side surface portion 46. The inclined side surface portion 47 is formed by chamfering the tip corner portion 40 (the lower side and the left side in FIG. 2).

The first connection portion 41 is welded to the edge of the side panel 2 and the second connection portion 42 is welded to the edge of the front and rear panel 3. The upper and lower edges of the first projecting surface portion 43, the second projecting surface portion 44, the first side surface portion 45, the second side surface portion 46, and the inclined side surface portion 47 are welded to the upper and lower corner fittings 5, respectively. When the cargo containers 1 are stacked up and down, the corner fittings 5 of the upper and lower cargo containers 1 are brought into contact with the corner posts 4. As a result, the load of the cargo container 1 stacked above is transmitted to the corner post 4 of the lower cargo container 1 through each corner fitting 5. The corner fitting 5 is provided with a horizontal hole from the side with respect to the box-shaped base body made of a casting, and further provided with an upper hole from the upper surface (or a pilot hole from the lower surface). In these horizontal holes and upper holes (or pilot holes), attachment devices for lifting and transporting by a crane or the like can be mounted, respectively. Further, in the freight container 1 stacked on top, the contact surfaces of the corner fittings 5 are in contact with each other.

Next, as the width dimension b0 of the corner post 4, first, the width dimension bx0 in the X direction of the corner post 4 is the first side surface from the second corner portion 40D where the second connecting portion 42 and the second protruding surface portion 44 are continuous. This is the width dimension in the vertical direction with respect to the first side surface portion 45 up to the portion 45. In other words, it is set by the dimension excluding the second connection portion 42, that is, the distance between the second corner portion 40 D where the second connection portion 42 and the second protruding surface portion 44 are continuous and the first side surface portion 45.
Further, the width dimension by0 in the Y direction is a width dimension in the vertical direction with respect to the second side surface portion 46 from the first corner portion 40C to the second side surface portion 46 where the first connecting portion 41 and the first projecting surface portion 43 are continuous. is there. In other words, it is set by the dimension excluding the first connection portion 41, that is, the distance between the first corner portion 40 C where the first connection portion 41 and the first protruding surface portion 43 are continuous and the second side surface portion 46. That is, the width dimensions bx0 and by0 are the dimensions of the portions joined to the corner fitting 5, respectively. Hereinafter, the width dimension is referred to as a fitting part width dimension. Such fitting part width dimensions bx0 and by0 are defined by the dimensions of the corner fitting 5 based on international standards. For example, the fitting part width dimension is represented by the center thickness of the sheet thickness, and the corner post thickness (plate thickness) is 6 mm. The dimension bx0 is about 149 mm, and the fitting part width dimension by0 is about 168 mm.
Further, the width dimension by1 of the first side surface part 45 is a dimension obtained by subtracting the width dimension by2 of the projection of the inclined side surface part 47 from the fitting part width dimension by0. On the other hand, the width dimension bx1 of the second side surface part 46 is a dimension obtained by subtracting the width dimension bx2 corresponding to the projection of the inclined side surface part 47 from the fitting part width dimension bx0.

Here, as an example of setting the width dimensions bx0 and by0, when the material yield strength F is 700 MPa and the thickness t of the corner post 4 is 3.6 mm, the fitting part width dimension bx0 in the X direction is about 149 mm. Yes, the fitting part width dimension by0 in the Y direction is about 168 mm, and these fitting part width dimensions b0 (bx0, by0) satisfy the relationship of the following expression (0).
b0> 740t / (√F) (0)
Further, the width dimension by1 of the first side surface part 45 is set to 100 mm, the width dimension by2 of the projection of the inclined side surface part 47 is set to 68 mm, the width dimension bx1 of the second side surface part 46 is set to 100 mm, and The projected width dimension bx2 is set to 49 mm. Therefore, the width dimension bxy of the inclined side surface portion 47 is set to about 83.8 mm. The relationship between the maximum width dimension b among the width dimensions b (bx1, by1, bxy) of the surface portion, the thickness t of the corner post 4 and the material yield strength F of the corner post 4 is expressed by the following equation (1 ) Is satisfied.
b ≦ 740 t / (√F) (1)
Therefore, when the material yield strength F is 700 MPa and the thickness t is 3.6 mm, the width dimension b (bx1, by1, bxy) is 100.7 mm or less which is the calculated value of the right side of the formula (1). I just need it. Here, the width dimension by1 of the first side surface part 45, the width dimension bx1 of the second side surface part 46, and the width dimension bxy of the inclined side surface part 47 in the example are all 100.7 mm or less, and the formula (1) Satisfied.

Next, in FIG. 3, the corner post 4 A includes a first connection portion 41, a second connection portion 42, a first projecting surface portion 43, a second projecting surface portion 44, and substantially the same as the corner post 4 described above. The first side surface portion 45, the second side surface portion 46, and the inclined side surface portion 47 are provided. The planar cross-sectional shape of the corner post 4 A is formed in a substantially Ω shape, and the first protruding surface portion 43 and the first side surface are formed on the third corner portion 40 A where the first protruding surface portion 43 and the first side surface portion 45 are continuous. An inclined chamfered portion 48 that is inclined with respect to the portion 45 and chamfered is formed. That is, the first side surface portion 45 is indirectly provided on the first protruding surface portion 43.
In addition, an inclined chamfered portion 49 that is inclined and chamfered with respect to the second protruding surface portion 44 and the second side surface portion 46 is formed in the fourth corner portion 40B where the second protruding surface portion 44 and the second side surface portion 46 are continuous. ing. That is, the second side surface portion 46 is indirectly provided on the second protruding surface portion 44. In this corner post 4A, the width dimension bxyA of the inclined side surface portion 47 is smaller than that of the corner post 4 shown in FIG. Further, since the inclined chamfered portion 48 is formed, the width dimension by1A of the first side face 45 is smaller than the width dimension by1 of the first side face 45 shown in FIG. Further, since the inclined chamfered portion 49 is formed, the width dimension bx1A of the second side face part 46 is smaller than the width dimension bx1 of the second side face part 46 shown in FIG. That is, also in the corner post 4A, the width dimension by1A of the first side face part 45, the width dimension bx1A of the second side face part 46, and the width dimension bxyA of the inclined side face part 47 all satisfy the formula (1).

Next, in FIG. 4, the corner post 4 B includes a first connection portion 41, a second connection portion 42, a first projecting surface portion 43, a second projecting surface portion 44, and substantially the same as the corner post 4 described above. It has a side surface portion 45 and a second side surface portion 46 and has a substantially Ω shape in cross section. Instead of the inclined side surface portion 47, a tip convex curved surface portion 50 formed with an outwardly convex curved surface is formed at the tip corner portion 40, and a convex shape chamfered with an outwardly convex curved surface at the third corner portion 40A. A chamfered portion 51 is formed, and a convex chamfered portion 52 that is chamfered with an outwardly convex curved surface is formed at the fourth corner portion 40B. That is, the first side surface portion 45 is indirectly provided on the first projecting surface portion 43, and the second side surface portion 46 is indirectly provided on the second projecting surface portion 44.
In this corner post 4B, the width dimension by1B of the first side face portion 45 is the width dimension of the first side face portion 45 shown in FIG. 2 by forming the tip convex curved surface portion 50 and the convex

chamfered portions

51, 52. The width dimension bx1B of the second side surface portion 46 is smaller than by1 and smaller than the width dimension bx1 of the second side surface portion 46 shown in FIG. That is, also in the corner post 4B, the width dimension by1B of the first side face part 45 and the width dimension bx1B of the second side face part 46 both satisfy the expression (1).

Next, in FIG. 5, the corner post 4 C includes a first connection portion 41, a second connection portion 42, a first projecting surface portion 43, a second projecting surface portion 44, and substantially the same as the corner post 4 described above. It has a side surface portion 45 and a second side surface portion 46, and has a substantially Ω-shaped cross section. Instead of the inclined side surface portion 47 and the tip convex curved surface portion 50, a tip concave curved surface portion 53 formed with an inwardly concave curved surface is formed at the tip corner portion 40, and indented in the third corner portion 40A. A concave chamfer 54 chamfered with a curved surface is formed, and a concave chamfer 55 chamfered with a curved surface concave inward is formed at the fourth corner 40B. That is, the first side surface portion 45 is indirectly provided on the first protruding surface portion 43, and the second side surface portion 46 is indirectly provided on the second protruding surface portion 44.
In this corner post 4C, the width of the first side surface 45 is larger than the width of by 1 of the first side surface 45 shown in FIG. 2 by forming the tip concave curved surface portion 53 and the concave

chamfered portions

54 and 55. The width dimension bx1C of the second side surface portion 46 is smaller than the width dimension bx1 of the second side surface portion 46 shown in FIG. That is, also in the corner post 4C, the width dimension by1C of the first side face part 45 and the width dimension bx1C of the second side face part 46 both satisfy the expression (1).

Next, in FIG. 6, the corner post 4 D includes a first connection portion 41, a second connection portion 42, a first protrusion surface portion 43, a second protrusion surface portion 44, It has a side surface portion 45, a second side surface portion 46, and an inclined side surface portion 47, and the plane cross section has a substantially Ω shape. A convex chamfer 51 is formed at the third corner 40A, and a convex chamfer 52 is formed at the fourth corner 40B. That is, the first side surface portion 45 is indirectly provided on the first protruding surface portion 43, and the second side surface portion 46 is indirectly provided on the second protruding surface portion 44.
Also in this corner post 4D, the width dimension by1D of the first side face part 45, the width dimension bx1D of the second side face part 46, and the width dimension bxyD of the inclined side face part 47 all satisfy the formula (1).

Next, in FIG. 7, the corner post 4 E includes a first connection portion 41, a second connection portion 42, a first protrusion surface portion 43, a second protrusion surface portion 44, substantially the same as the corner post 4 described above. It has a side surface portion 45, a second side surface portion 46, and an inclined side surface portion 47, and the plane cross section has a substantially Ω shape. The first projecting surface portion 43 is an inclined first projecting surface portion 43 A that projects from the first connecting portion 41 outward and inclining toward the tip corner portion 40. That is, in the corner post 4 shown in FIG. 2, the angle formed by the first projecting surface portion 43 and the first side surface portion 45 is approximately 90 degrees, but in the corner post 4E shown in FIG. 7, the first projecting surface portion 43A. And the first side surface portion 45 is more than 90 degrees. The second projecting surface portion 44 is an inclined second projecting surface portion 44 A that projects from the second connecting portion 42 outward and inclining toward the tip corner portion 40. That is, in the corner post 4 shown in FIG. 2, the angle formed between the second projecting surface portion 44 and the second side surface portion 46 is approximately 90 degrees, but in the corner post 4E shown in FIG. 7, the second projecting surface portion 44A. And the second side surface portion 46 is more than 90 degrees. In this corner post 4E, by forming the inclined side surface portion 47, the inclined first protruding surface portion 43A, and the inclined second protruding surface portion 44A, the width dimension by1E of the first side surface portion 45 is the first side surface portion shown in FIG. The width dimension bx1E of the second side surface portion 46 is smaller than the width dimension bx1 of the second side surface portion 46 shown in FIG. That is, also in the corner post 4E, the width dimension by1E of the first side face part 45, the width dimension bx1E of the second side face part 46, and the width dimension bxyE of the inclined side face part 47 all satisfy the formula (1). Furthermore, the width dimension bx3 of the inclined first projecting surface portion 43A and the width dimension by3 of the inclined second projecting surface portion 44A also satisfy Expression (1).

Next, in FIG. 8, the corner post 4 F includes a first connection portion 41, a second connection portion 42, a first protrusion surface portion 43, a second protrusion surface portion 44, substantially the same as the corner post 4 described above. It has a side surface portion 45 and a second side surface portion 46, and has a substantially Ω-shaped cross section. The inclined side surface portion 47 is omitted, an intermediate bent portion 56 bent inward is formed at an intermediate position of the first side surface portion 45, and an intermediate bent portion bent inward at an intermediate position of the second side surface portion 46. 57 is formed. In this corner post 4F, by forming the intermediate

bent portions

56 and 57, the width dimension by4F and the width dimension by5F of the divided first side surface portion 45A obtained by dividing the first side surface portion 45 into two are shown in FIG. The width dimension bx4F and the width dimension bx5F of the divided second side face part 46A obtained by dividing the second side face part 46 into two are smaller than the width dimension by1 of the first side face part 45, and the second side face part 46 shown in FIG. It is smaller than the width dimension bx1. That is, also in the corner post 4F, the width dimensions by4F and by5F of the divided first side surface portion 45A and the width dimensions bx4F and bx5F of the divided second side surface portion 46A all satisfy the expression (1).

Next, a modified example of corner fitting in the cargo container 1 to which the present invention is applied will be described with reference to FIG. Here, FIG. 9 shows a corner fitting 5A according to a modified example in which the corner post 4A is employed.
At the three corners outside the corner fitting 5A, chamfered portions 5B are formed along the shape of the inclined side surface portion 47 formed at the tip corner portion 40 of the corner post 4A, and the inclined chamfer formed at the third corner portion 40A. A chamfered portion 5C is formed along the shape of the portion 48, and a chamfered portion 5D is formed along the shape of the inclined chamfered portion 49 formed at the fourth corner portion 40B. By forming the

chamfered portions

5B, 5C and 5D corresponding to the shape of the corner post 4A in the corner fitting 5A in this way, the corner fitting 5A itself can be reduced in weight, and the weight reduction of the entire cargo container 1 can be promoted. Can do.
Here, the configuration in which the chamfered portion is formed in the corner fitting 5A using the corner post 4A shown in FIG. 3 is shown. However, the chamfered portion is formed in the corner fitting 5 in FIGS. Is also possible.

Hereinafter, the result of having examined the member strength of a corner post about the cargo container 1 to which this invention is applied is demonstrated.
Here, the freight container 1 to which the present invention is applied is used as an example, and a freight container having a conventional corner post is used as a comparative example. The FEM analysis model used was a model in which each container was divided into four planes to set symmetry conditions at the boundary portion, and local buckling was considered for the elements of each member including the corner post. The analysis conditions were ISO 1496-1 Test No. With reference to the test load condition of 1 (Stacking), a distributed load was applied on the bottom pallet, a vertical load from the stacked upper container was applied to the corner fitting, and this vertical load was gradually increased. The stress at each part and the vertical displacement of the load point until local buckling occurred were investigated.

〔Example〕
In the example, a corner post 4 shown in FIG. 2 was used. The material yield strength F of the corner post 4 is 700 MPa, and the thickness t of the corner post 4 is 3.6 mm. The width dimension bx0 of the fitting part in the X direction of the corner post 4 is 149 mm, the width dimension by0 of the fitting part in the Y direction is 168 mm, and the width dimension by1 of the first side face 45 is 100 mm (the width dimension by2 is 68 mm), and the width dimension bx1 of the second side surface portion 46 is 100 mm (the width dimension bx2 is 49 mm).

[Comparative example]
In the comparative example, the same member as in the example was used except that the corner post 400 shown in FIG. 10 was used. The material yield strength F of the corner post 400 of the comparative example is 700 MPa, and the thickness t of the corner post 400 is 3.6 mm. The corner post 400 includes a first connecting portion 410, a second connecting portion 420, a first protruding surface portion 430, a second protruding surface portion 440, a first side surface portion 450, and a second side surface portion 460. The cross section has a substantially Ω shape. The corner post 400 is different from the corner post 4 of the embodiment in that the inclined side surface portion 47 is not formed. The width dimensions bx0 and by0 of the fitting part in the X direction and the Y direction of the corner post 400 are 149 mm and 168 mm, respectively. Since the width dimension of the fitting part is equal to the width dimension of the surface part in each direction, the width dimension of the surface part of the first side surface part 450 is 168 mm, and the width dimension of the second side surface part 460 is 149 mm.

FIG. 11 shows a Mises stress contour diagram and a deformation diagram of the analysis result of the example, and FIG. 12 shows a Mises stress contour diagram and a deformation diagram of the analysis result of the comparative example. FIG. 13 shows a graph of the load-deformation relationship of the example and the comparative example.
In the corner post 4 of the embodiment, as shown in FIG. 11, local buckling is not seen in the first side face portion 45 and the inclined side face portion 47, and as shown in FIG. The yield strength is stable even when the yield strength is exceeded.
On the other hand, in the corner post 400 of the comparative example, local buckling occurs in the first side surface portion 450 and the second side surface portion 460 as shown in FIG. As a result, as shown in FIG. 13, the rigidity represented by the slope of the load-deformation relationship is significantly reduced before the predetermined required yield strength is reached, and immediately after that, the yield strength decreases rapidly, and no increase in yield strength can be expected. I understand.

Next, the degree of change in the width dimension of each face portion accompanying the change in shape of the inclined side face portion of the corner post 4 shown in FIG. 2, and the effective ratio ρ (effective width be (= 740 t / (√F)) of the cross section of each face portion Table 1 shows the ratio of the width dimension b to). By increasing the width dimensions bx2 and by2 for the projection of the inclined side face portion 47, the width dimension bx1 of the second side face portion 46 and the width dimension by1 of the first side face portion 45 can be kept smaller than the effective width be. It can be seen that if bx2 and by2 are excessively increased, the width dimension bxy of the inclined side surface portion 47 exceeds be, and this effective rate decreases.
That is, in consideration of the width dimension of each face part, at least in the face part having the largest width dimension, the relationship between the thickness t of the corner post, the width dimension b of the face part, and the material yield strength F of the corner post is b ≦ 740 t. The width dimension b, the thickness t, and the material yield strength F of the surface portion are set so as to satisfy the relationship of / (√F). Thereby, since the cross-sectional area can be reduced while securing the member yield strength against the compressive load, it becomes possible to reduce the weight of the corner post itself and to improve the yield strength.

The present invention is not limited to the above-described embodiment, and includes other configurations and the like that can achieve the object of the present invention, and includes the following modifications and the like.
For example, in the above-described embodiment, the material yield strength F of the steel material used for the corner post has been described as 700 MPa as an example. However, the material yield strength F is not limited to 700 MPa. Further, the material yield strength F is not limited to the standard strength, and can be set according to the actual strength. In the cross-sectional views of the corner posts in FIGS. 2 to 10, the bending R (usually R = 1.5 t to 2.5 t in the thickness center radius) associated with the corner post forming process is omitted. When the bending R is present, dimensions such as the width dimension of the surface portion can be determined starting from the starting point of R.

In addition, the best configuration, method and the like for carrying out the present invention have been disclosed in the above description, but the present invention is not limited to this. That is, the invention has been illustrated and described with particular reference to certain specific embodiments, but without departing from the spirit and scope of the invention, Various modifications can be made by those skilled in the art in terms of material, quantity, and other detailed configurations.
Therefore, the description limiting the shape, material, etc. disclosed above is an example for easy understanding of the present invention, and does not limit the present invention. The description by the name of the member which remove | excluded the limitation of one part or all of such restrictions is included in this invention.

1 Cargo Container 2 Side Panel 3 Front and

Rear Panels

4, 4A, 4B, 4C, 4D, 4E, 4F Corner Post 5 Corner Fitting 6 Top Panel 40 Tip Corner

40A Third Corner

40B Fourth Corner 40C First Corner Part 40D Second corner part 41 First connecting part 42 Second connecting part 43 First projecting surface part 43A Inclined first projecting surface part 44 Second projecting surface part 44A Inclined second projecting surface part 45 First side part 46 Second side part 47 Inclined

Side surface portion

48, 49 Inclined chamfered portion 50 Tip convex

curved surface portion

51, 52 Convex chamfered portion 53 Tip concave

curved surface portion

54, 55 Concave chamfered portion 56 Intermediate bent portion 57 Intermediate bent portion

Claims

A rectangular bottom pallet;
A pair of side panels and a pair of front and rear panels erected on the four sides of the bottom pallet;
A plurality of corner posts which are erected on the corners of the bottom pallet and connect between the side edges of the side panels and the side edges of the front and rear panels;
Corner fittings provided at the upper and lower ends of these corner posts;
A top panel provided in connection with an upper edge of the side panel and the front and rear panels;
A freight container with
When the corner post is viewed in plan,
A first connecting portion connected to a side edge of the side panel;
A second connection portion connected to a side edge portion of the front and rear panels;
A first projecting surface portion that protrudes outwardly from the first connecting portion and intersects the surface direction of the side panel;
A second projecting surface portion projecting outward from the second connecting portion and projecting outwardly intersecting the surface direction of the front and rear panels;
A first side surface provided directly or indirectly on the first protruding surface and extending in the surface direction of the side panel;
A second side surface provided directly or indirectly on the second projecting surface and extending in the surface direction of the front and rear panels;
A tip corner provided continuously on the first side surface and the second side surface;
Having a substantially Ω shape formed by
The width dimension in the vertical direction with respect to the second side surface portion from the first corner portion to the second side surface portion where the first connection portion and the first protruding surface portion are continuous, the second connection portion and the second protrusion. Of the width dimension in the vertical direction with respect to the first side surface portion from the second corner portion to the first side surface portion where the surface portion is continuous, at least the minimum width dimension b0, the thickness t of the corner post, and the corner post The relationship with the material yield strength F satisfies b0> 740 t / (√F), and
Of the width dimensions of the first side surface portion and the second side surface portion, at least the maximum width dimension b, the thickness t of the corner post, and the material yield strength F of the corner post are expressed by b ≦ 740 t. / (√F) satisfying the freight container.
An inclined side surface portion that intersects and is continuous with both the first side surface portion and the second side surface portion is provided at the tip corner portion;
Of the width dimensions of the inclined side surface portion, the first side surface portion, and the second side surface portion, the relationship between at least the maximum width dimension b, the thickness t of the corner post, and the material yield strength F of the corner post, b ≦ 740 t / (√F) is satisfied;
The freight container according to claim 1.
The cargo container according to claim 2, wherein a chamfered portion is formed at a corner of the corner fitting along the shape of the inclined side surface.
The tip corner is provided with a tip convex curved surface portion formed by a convex curved surface facing outward, or a tip concave curved surface portion formed by a concave curved surface facing inward. Freight container as described in.
5. A freight container according to claim 4, wherein a chamfered portion is formed at a corner of the corner fitting along the shape of the tip convex curved surface portion or the tip concave curved surface portion.
At least one of the third corner portion where the first protruding surface portion and the first side surface portion are continuous and the fourth corner portion where the second protruding surface portion and the second side surface portion are continuous,
Among the inclined chamfered portion chamfered with an inclined surface, a convex chamfered portion chamfered with a convex curved surface facing the corner outward, and a concave chamfered portion chamfered with a concave curved surface directed inward with the corner portion Any one of these is formed, The container for cargoes of any one of Claims 1-5 characterized by the above-mentioned.
The freight container according to claim 6, wherein a chamfered portion is formed at a corner of the corner fitting along the shape of the inclined chamfered portion, the convex chamfered portion or the concave chamfered portion.
The first projecting surface portion is an inclined first projecting surface portion projecting from the first connection portion outward and tilting toward the tip;
The second projecting surface portion is an inclined second projecting surface portion projecting from the second connection portion outward and tilting toward the tip portion;
The freight container according to claim 1.
The cargo container according to claim 8, wherein chamfered portions are formed at corners of the corner fitting along the shapes of the inclined first protruding surface portion and the inclined second protruding surface portion.
The first side surface portion and the second side surface portion are each provided with an intermediate bent portion formed by an inwardly concave curved surface or an inwardly refracting surface at each intermediate position. The freight container according to 1.