TWI417232B - Freight container - Google Patents

Description

Container for goods Field of invention

The present invention relates to a container for goods for transporting the loaded goods by sea or by land.

The present invention claims priority based on Japanese Patent Application No. 2009-210180, filed on Sep. 11, 2009, the disclosure of which is incorporated herein.

Background of the invention

BACKGROUND OF THE INVENTION Containers for goods for transporting goods are mainly formed of metal members such as steel, stainless steel, aluminum, etc., and are formed in a rectangular parallelepiped box. Further, the cargo container is loaded with cargo inside, and is transported by means of transportation means such as a ship, a truck, or a railway. In particular, in recent years, from the viewpoint of not only the efficiency of global logistics between Japan and the rest of the world, the weight resistance of the container for goods, the overall size, and the shape of the connecting part of the conveyor, etc. are based on ISO, etc. International standards are generally common throughout the world. By standardizing the common use of containers for goods under certain rules, the interchangeability or convenience during transportation is ensured.

In recent years, from the perspective of global environmental protection, in the field of logistics, the trend of the reduction of the emission of greenhouse gases is gradually increasing, and the moving means such as ships, trucks, and railways for moving goods are developing and lightening. Since the container for the cargo is transported by these moving means, it is preferable to reduce the weight of the container itself, and to reduce the weight of the entire moving means, and to improve the environmental protection of the earth. In this context, in the container for goods, The requirements for lightweighting are gradually increasing. Here, it is necessary to ensure the weight-resistance performance specified by ISO and to reduce the weight.

Further, the form of the container for goods generally includes a rectangular bottom plate, a pair of side panels erected on the four sides of the bottom plate, a pair of front and rear panels, and a vertical portion provided at a corner of the bottom plate. a plurality of corner posts connecting the side edge portions of the side panels and the side edge portions of the front and rear panels, the corner fittings disposed at the upper ends and the lower ends of the equiangular columns, and the front side panels and the front and rear panels The top panel is located at the edge. The container for such a cargo is designed such that the cross-sectional shape of the corner post matches the cross-sectional shape of the corner fitting as much as possible, and the cross-sectional area of the corner post is increased, thereby ensuring the endurance of the member for compressing the load at the time of stacking the cargo container. And to meet the performance requirements for the cascading.

Advanced technical literature Patent literature

Patent Document 1 Japanese Patent Publication Gazette No. 2005-536413

Summary of invention

However, according to the conventional container for goods, since the sectional area of the corner post must be enlarged, the weight of the portion is increased. In other words, in order to improve the endurance of the member for compressing the load, it is necessary to increase the cross-sectional area of the corner post, but the weight is increased, and there is a problem that the weight reduction cannot be required.

An object of the present invention is to provide a container for goods which can reduce the weight of the entire corner of the container for the cargo, and further improve the stacking performance while securing the durability of the member.

(1) A container for cargo according to an aspect of the present invention comprises a rectangular bottom plate, a pair of side panels erected on the four sides of the bottom plate, and a pair of front and rear plates, which are erected at a corner of the bottom plate a plurality of corner posts connecting the side edge portions of the side panels and the side edge portions of the front and rear panels, the corner fittings disposed at the upper ends and the lower ends of the equiangular columns, and the front side panels and the front and rear panels The top panel provided at the edge portion has an open cross-sectional shape when the corner post is viewed in a planar cross section, and the open cross-sectional shape is connected to the front and rear panels by a first connecting portion connected to a side edge portion of the side panel. a second connecting portion of the side edge portion is connected to the first connecting portion and protrudes in a direction intersecting the surface direction of the side panel, and is provided along the first side of the corner fitting a second protruding portion that is continuous with the second connecting portion and that protrudes in a direction other than the surface direction of the front and rear plates, and is provided along the second side of the corner device, and is directly provided in the first portion 1 protruding the face and extending in the direction of the side panel And the first side surface portion provided along the third side connected to the first side of the cabinet corner device through the corner portion is directly provided on the second protruding surface portion and extends in the surface direction of the front and rear panels, and a second side surface portion provided along a fourth side of the transmission corner portion connected to the second side of the corner fitting device, and a second side surface portion connected to the first side surface portion and the second side surface portion, and the third side portion The corner portion of the fourth side is formed adjacent to the front end corner portion, and the first corner portion from the first connecting portion and the first protruding portion is connected to the first side surface portion in the vertical direction with respect to the second side surface portion. The width dimension and the width dimension of the second corner portion from the second connecting portion and the second protruding surface portion to the first side surface portion in the vertical direction of the first side surface portion are a minimum width dimension b0, a relationship between a thickness t of the corner post and a material fall strength F of the corner post satisfying b0>740t/(√F), and at least a width dimension of the first side surface portion and the second side surface portion The relationship between the maximum width dimension b, the thickness t of the aforementioned corner post and the material fall strength F of the corner post satisfies b ≦ 740 t / (√ F).

(2) The cargo container according to the above (1), wherein the front end corner portion is provided with an inclined side surface portion that is continuous with both the first side surface portion and the second side surface portion, and the inclined side surface portion and the first side surface Among the width dimensions of the second portion and the second side surface portion, at least the maximum width dimension b, the relationship between the thickness t of the corner post and the material fall strength F of the corner post satisfy b ≦ 740 t / (√ F).

(3) The cargo container according to (2) above, wherein the corner portion of the corner fitting is formed along the shape of the inclined side surface portion.

(4) The cargo container according to the above (1), wherein the front end corner portion is formed with a convex curved surface portion that faces toward the outer side, or a concave curved surface portion that is formed with a concave curved surface that faces the inner side.

(5) The cargo container according to (4) above, wherein the corner portion of the corner fitting is formed along the shape of the front end convex curved surface portion or the front end concave curved surface portion.

(6) The cargo container according to any one of the above (1) to (5), wherein the first protruding portion and the first side surface portion are connected to the third corner portion, the second protruding surface portion, and the second side surface portion At least one of the fourth corner portions of the splicing is formed with a chamfered portion that chamfers the corner portion with an inclined surface, a convex chamfer portion that deviates the corner portion toward the outer convex curved surface, and the corner portion Any one of the concave decorners that are chamfered toward the concave curved surface on the inner side.

(7) The cargo container according to the above (6), preferably formed in a corner portion of the corner fitting along the shape of the inclined chamfered portion, the convex chamfered portion or the concave chamfered portion Corner.

(8) The cargo container according to the above (1), wherein the first protruding surface portion is preferably a first inclined surface that is inclined from the first connecting portion toward the outer side and the distal end portion, and the second protruding surface is preferably used as a slave The second connecting portion is inclined toward the outer side and the front end portion, and the second protruding surface portion is inclined.

(9) The cargo container according to (8) above, wherein the corner portion is formed at a corner portion of the corner fitting along the shape of the inclined first protruding surface portion and the inclined second protruding surface portion.

(10) The cargo container according to the above (1), wherein the first side surface portion and the second side surface portion are preferably provided with an intermediate curved portion formed by a concave curved surface facing inward at an intermediate position or a meandering surface facing inward.

According to the cargo container described in the above (1), since the material strength of the corner post is strong and the thickness of the corner post is thin, the width dimension b0 of the corner post is greater than 740 t/( F), in the corner post 1 having the flexure of the plate element, by setting the width dimension b of each face to 740 t (√F) or less, the buckling of the plate member can be suppressed, and the endurance of the member for compressing the load is ensured, and The cross-sectional area can be reduced. As a result, the weight of the corner post itself can be reduced. Be=740t/(√F) is the expression of the effective width be of the plate element that is subjected to the in-plane compressive force. If b≦be, the ineffective part of the local buckling is not generated for the compressive force on the plate element. When the efficiency of the cross section is lowered, the weight can be efficiently reduced.

If the thickness of the corner post is thin, the weight of the corner post itself can be reduced. It is related to the weight reduction of the entire container for goods, and the amount of greenhouse gas emission can be reduced, and it is also a suitable structure from the viewpoint of global environmental protection. Moreover, by reducing the cross-sectional area of the corner post, it also contributes to the reduction of the material cost, and further, the surface area is also reduced, which also contributes to the reduction in the cost of painting.

When narrowing the cross-sectional area of the corner post, considering that the thickness of the corner post is constant, the width dimension b0 is reduced. Thus, when the width dimension b0 of the corner post itself is reduced, the joint portion of the corner post and the corner fitting, or each side is generated. The storage capacity of the front and rear panels is changed, or the size is not in conformity with the international specifications, and the disadvantages such as interchangeability or convenience during transportation are impaired.

On the other hand, in the case where the corner post itself is hardly changed, the method of reducing the cross-sectional area is to reduce the thickness of the corner post, and the thickness t is reduced with respect to the width dimension b of each face of the corner post. That is, the width to thickness ratio (b/t) is increased. Thereby, the problem of local buckling occurs, and there arises a problem that the performance of the compression load at the time of lamination cannot be satisfied.

Therefore, the thickness t and the width dimension b of the face are set to be the width dimension of the first side surface portion and the second side surface portion of the corner post, at least the maximum width dimension b, the thickness t of the corner post, and the material fall strength F of the corner post. The relationship satisfies b≦740t/(√F). Thereby, local buckling can be prevented, and the required performance for the compression load at the time of lamination can be satisfied.

According to the cargo container according to the above (2), the inclined side surface portion which is continuous with the first side surface portion and the second side surface portion and which is connected to the front end corner portion can be compared with the cargo container described in the above (1). The width dimension b of the first side surface portion and the second side surface portion reduces the amount of projection of the inclined side surface portion. By doing so, you can narrow down 1 width-thickness ratio (b/t) of the side surface portion and the second side surface portion. Further, in the inclined side surface portion, the thickness t of the corner post and the width dimension of each face portion are set to satisfy the relationship of the above formula (1), thereby preventing local buckling and ensuring the required performance of the compression load of the entire corner post.

According to the cargo container described in the above (3), since the corner fitting is formed in the corner fitting, the sectional area of the corner post is reduced. Thereby, the corner fittings themselves can be lighter, and the weight of the container for goods can be reduced.

According to the cargo container of the above (4), the front end convex portion or the front end concave curved surface portion is provided at the front end corner portion, and the width dimension b of the first side surface portion and the second side surface portion can be reduced. Thereby, the increase in the width-to-thickness ratio (b/t) of the first side surface portion and the second side surface portion can be suppressed, and local buckling can be prevented, and the required performance of the compression load of the entire corner column can be ensured.

According to the cargo container described in the above (5), since the corner fitting is formed in the corner fitting, the sectional area of the corner fitting is reduced. Thereby, the corner fittings themselves can be lighter, and the weight of the container for goods can be reduced.

According to the cargo container of the above (6), the third corner portion or the fourth corner portion of the corner portion other than the tip end portion is provided with a chamfered portion, a convex chamfered portion or a concave chamfered portion. The width dimension b of the first side surface portion and the second side surface portion is reduced. Thereby, the width-to-thickness ratio (b/t) of the first side surface portion and the second side surface portion can be further suppressed. Here, the relationship between the thickness of the inclined chamfered portion and the width dimension of the face and the lodging strength of the village material naturally satisfy the above formula (1).

According to the cargo container described in the above (7), since the corner fitting is formed in the corner fitting, the sectional area of the corner fitting is reduced. Thereby, the corner fittings themselves can be lighter, and the weight of the container for goods can be reduced.

According to the cargo container of the above (8), the width of the first side surface portion and the second side surface portion can be made by using the first protruding surface portion and the second protruding surface portion as the inclined first protruding surface portion and the inclined second protruding surface portion, respectively. Reduce the amount of these tilts. Thereby, the width-to-thickness ratio (b/t) of the first side surface portion and the second side surface portion can also be reduced. At this time, the relationship between the thickness t, the width dimension b, and the material fall strength F of the inclined first protruding surface portion and the inclined second protruding surface portion satisfies the above formula (1).

According to the cargo container of the above (9), since the corner fitting is formed in the corner fitting, the sectional area of the corner fitting is reduced. Thereby, the corner fittings themselves can be lighter, and the weight of the container for goods can be reduced.

According to the cargo container of the above (10), since the first side surface portion and the second side surface portion are divided into right and left by the intermediate curved portion, the width dimension b of each of the divided side surface portions can be reduced. Thereby, since the width-to-thickness ratio (b/t) of the first side surface portion and the second side surface portion can be reduced, the local buckling strength can be improved.

Simple illustration

Fig. 1 is a perspective view of a container for goods according to an embodiment of the present invention.

Figure 2 is an enlarged cross-sectional view of the corner post and cabinet corner of the container for cargo in Figure 1.

Fig. 3 is an enlarged cross-sectional view showing a modification of the corner post.

Fig. 4 is an enlarged cross-sectional view showing another modification of the corner post.

Fig. 5 is an enlarged cross-sectional view showing another modification of the corner post.

Fig. 6 is an enlarged cross-sectional view showing another modification of the corner post.

Fig. 7 is an enlarged cross-sectional view showing another modification of the corner post.

Fig. 8 is an enlarged cross-sectional view showing another modification of the corner post.

Fig. 9 is an enlarged cross-sectional view showing a modification of the cabinet corner fitting.

Figure 10 is an enlarged cross-sectional view showing a conventional corner post.

Fig. 11 is a view showing the results of FEM analysis of the embodiment of the present invention.

Fig. 12 is a view showing the results of FEM analysis of the comparative example of the present invention.

Fig. 13 is a graph showing the load-deformation relationship of the analysis results of the foregoing examples and comparative examples.

Detailed description of the preferred embodiment Form for implementing the invention

Hereinafter, an embodiment of the present invention will be described based on the drawings.

As shown in Fig. 1, the container 1 for cargo to which the present invention is applied is constituted by a casing and can be loaded with goods. Further, the cargo container 1 is made of a metal such as steel, stainless steel or aluminum. The container 1 for cargo is premised on transportation by means of transportation means such as a ship, a truck, or a railway. Therefore, from the viewpoint of improving interchangeability and convenience during transportation, it is based on specifications such as ISO.

The cargo container 1 includes a rectangular bottom plate (not shown), one side panel 2 and a pair of front and rear panels 3 which are erected on the bottom side of the bottom tray, and are erected at the corner of the bottom tray, and the connecting side a plurality of corner posts 4 between the side edge portions of the panel 2 and the side edges of the front and rear panels 3, the corner fittings 5 disposed at the upper ends and the lower ends of the equiangular columns 4, and the upper edges of the side panels 2 and the front and rear panels 3 The top panel 6 is provided in part.

The side panel 2 and the front and rear panels 3 are respectively disposed on the bottom tray, and the adjacent panels 2 and 3 are connected to each other by the corner posts 4. The adjacent side panels 2 and the front and rear panels 3 have a substantially perpendicular relationship with each other. Further, the side panel 2, the front and rear panels 3, and the top panel 6 are formed of a corrugated steel sheet composed of a thin steel plate having a thickness of about 1 mm to 2 mm. Set on the side, front and back, and top surface of the container 1 for goods The switch door, not shown, can be used to load the goods into the container. For example, when a switch door is provided on either front or rear side, the corner post adjacent to the door may be formed by a grooved steel or the like having a shape different from that of the corner post 4 of the present embodiment. At this time, the corner post 4 described later may be applied only to any of the front and rear surfaces. That is, the corner post 4 described later is not applied to all of the four corners of the container, but may be applied to only any of the four corners.

Next, the configuration of the corner post 4 to which the cargo container 1 of the present embodiment is applied will be described with reference to Figs. 2 to 8 . 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 of a modified example.

In either of the second to eighth drawings, the corner post 4 is made of weather resistant steel, and is formed by bending a steel plate having a thickness t of about 3 mm to 5 mm. The steel material used for the steel sheet has a material with a strength F of 550 MPa to 700 MPa.

As shown in FIG. 2, when the corner post 4 is viewed in a plan view, it has a substantially Ω shape, and the substantially Ω shape is connected to the side edge of the side panel 2, and is connected to the side edge of the front and rear panels 3. The second connecting portion 42 of the portion is connected to the first connecting portion 41, and the first protruding surface portion 43 that protrudes in a direction other than the surface direction of the side panel 2 (the X direction is leftward in the drawing) is connected to the second The second protruding surface portion 44 of the connecting portion 42 that protrudes in a direction other than the surface direction of the front and rear plates 3 (the Y direction is downward in the drawing) is directly provided on the first protruding surface portion 43 and faces the side panel 2 The first side surface portion 45 that extends in the direction, and the second side surface portion 46 that is directly provided on the second protruding surface portion 44 and extends in the surface direction of the front and rear plates 3 are successively provided in the first side surface portion 45 and the second side surface portion 46. The front end corner portion 40 is formed.

Specifically, the first connecting portion 41 is disposed in a direction opposite to the side panel 2 (in the figure) The Y direction: the longitudinal direction of the container 1 for goods is parallel and is connected to the side panel 2. The second connecting portion 42 is provided in parallel with the surface direction of the front and rear plates 3 (the X direction in the drawing: the width direction of the cargo container 1), and is connected to the front and rear plates 3.

Further, in the present embodiment, the front end corner portion 40 is formed with the inclined side surface portion 47 which is continuous with both the first side surface portion 45 and the second side surface portion 46. The inclined side surface portion 47 is formed by the corner end corner portion 40 (the lower side and the left side in Fig. 2).

The first connecting portion 41 is welded to the edge portion of the side panel 2, and the second connecting portion 42 is welded to the edge portion of the front and rear plates 3. The lower end edges of the first protruding surface portion 43, the second protruding 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. In the corner post 4, when the cargo container 1 is stacked up and down, the corner fittings 5 of the upper and lower cargo containers 1 can abut each other. As a result, the load of the cargo container 1 stacked on the upper side is transmitted to the corner post 4 of the lower cargo container 1 by the respective corner fittings 5. At the corner of the cabinet 5, the box-shaped base body of the caster is provided with a horizontal hole from the side, and further, an upper hole is provided from above (or a lower hole is provided from below). The horizontal and upper holes (or lower holes) can be mounted on the mounting machine for hanging or transporting each crane. Moreover, in the cargo container 1 which can be stacked on the upper side, the mutually abutting surfaces of the corner fittings 5 can abut.

Next, as the width dimension b0 of the corner post 4, first, the width dimension bx0 of the corner post 4 in the X direction is relative to the second corner portion 40D from the second connecting portion 42 and the second protruding surface portion 44 to the first side surface portion 45. The width dimension of the first side portion in the vertical direction. In other words, the distance between the second corner portion 40D that is continuous with the second connecting portion 42 and the second protruding surface portion 44 and the first side surface portion 45 is set in a size that does not include the second connecting portion 42.

In addition, the width dimension by0 in the Y direction is the width dimension of the first corner portion 40C to the second side surface portion 46 of the first connecting portion 41 and the first protruding portion 43 in the vertical direction with respect to the second side surface portion. In other words, the distance between the first corner portion 40C and the second side surface portion 46 that are continuous with the first connecting portion 41 and the first protruding portion 43 is set to a size that does not include the first connecting portion 41. That is, the width dimensions bx0, byo are respectively joined to the dimensions of the portion of the corner fixture 5. Hereinafter, the width dimension is referred to as a harness portion width dimension. The width dimension bx0, byo of such a fitting portion is specified by the size of the corner fitting 5 according to the international standard. For example, the thickness of the corner post (plate thickness) is 6 mm, and the width of the fitting portion is 6 mm. Bx0 is about 149mm, and the width of the harness is about 168mm.

Further, the width dimension by1 of the first side surface portion 45 is a size obtained by subtracting the width dimension by2 of the projection portion of the inclined side surface portion 47 from the harness portion width dimension by0. On the other hand, the width dimension bx1 of the second side surface portion 46 is a size obtained by subtracting the width dimension bx2 of the projection portion of the inclined side surface portion 47 from the harness portion width dimension bx0.

Here, each of the width dimensiones bx0 and byo is set such that the material fall strength F is 700 MPa, and when the thickness t of the corner post 4 is 3.6 mm, the width dimension bx0 of the X-direction fixture portion is about 149 mm, and the width of the fixture portion in the Y direction is about 149 mm. The size by0 is about 168 mm, and the width dimension b0 (bx0, by0) of the harness portion satisfies the relationship of the following formula (0).

B0>740t/(√F)...(0)

Further, the width dimension by1 of the first side surface portion 45 is 100 mm, the width dimension by2 of the projection portion of the inclined side surface portion 47 is set to 68 mm, and the width dimension bx1 of the second side surface portion 46 is 100 mm, and the projection portion of the inclined side surface portion 47 is projected. The width dimension bx2 is set to 49 mm. Thus, the width dimension bxy of the inclined side portion 47 Set to approximately 83.8 mm. The relationship between the maximum width dimension b of the width dimension b (bx1, by1, bxy) of the face, the thickness t of the corner post 4, and the material fall strength F of the corner post 4 satisfies the following formula (1).

B≦740t/(√F)...(1)

Therefore, when the material fall strength is 700 MPa and the thickness t is 3.6 mm, the width dimension (bx1, by1, bxy) may be a calculated value of 100.7 mm or less on the right side of the formula (1). Here, the width dimension by1 of the first side surface portion 45, the width dimension bx1 of the second side surface portion 46, and the width dimension bxy of the inclined side surface portion 47 are all 100.7 mm or less, and the formula (1) is satisfied.

Next, in FIG. 3, the corner post 4A has the first connecting portion 41, the second connecting portion 42, the first protruding surface portion 43, the second protruding surface portion 44, the first side surface portion 45, and the second portion which are substantially the same as the corner post 4 described above. The side portion 46 and the inclined side portion 47. The corner cross-sectional shape of the corner post 4A is formed in an approximately Ω shape, and the third corner portion 40A that is continuous with the first protruding surface portion 43 and the first side surface portion 45 is formed to be inclined with respect to the first protruding surface portion 43 and the first side surface portion 45. The chamfered portion 48 is inclined. In other words, the first side surface portion 45 is provided indirectly on the first protruding surface portion 43.

Further, the fourth corner portion 40B that is continuous with the second side surface portion 46 and the second side surface portion 46 is formed with a chamfered portion 49 that is inclined with respect to the second protruding surface portion 44 and the second side surface portion 46. In other words, the second side surface portion 46 is provided indirectly 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 the corner post 4 shown in Fig. 2. Further, since the inclined chamfered portion 48 is formed, the width dimension by1A of the first side surface portion 45 is smaller than the width dimension by1 of the first side surface portion 45 shown in Fig. 2 . Further, by forming the inclined chamfered portion 49, the width dimension bx1A of the second side surface portion 46 is smaller than the width dimension bx1 of the second side surface portion 46 shown in Fig. 2 . In other words, in the corner post 4A, the width dimension by1A of the first side surface portion 45, the width dimension bx1A of the second side surface portion 46, and the width dimension bxyA of the inclined side surface portion 47 also satisfy the formula (1).

Next, in FIG. 4, the corner post 4B has the first connecting portion 41, the second connecting portion 42, the first protruding surface portion 43, the second protruding surface portion 44, the first side surface portion 45, and the second side surface which are substantially the same as the corner post 4 described above. The portion 46 and the inclined side portion 47 have a plan cross section formed in an approximately Ω shape. The front end corner portion 40 is formed with a curved surface that is convex to the outer side, and the front end convex curved surface portion 50 is formed instead of the inclined side surface portion 47. The third corner portion 40A is formed with a convex shape that is convex to the outer surface. The corner portion 51 is formed with a convex chamfered portion 52 which is chamfered to the outer surface by the curved surface at the fourth corner portion 40B. In other words, 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 the corner post 4B, since the front end convex curved surface portion 50 and the convex deangulated portions 51 and 52 are formed, the width dimension by1B of the first side surface portion 45 is smaller than the width dimension by1 of the first side surface portion 45 shown in Fig. 2, The width dimension bx1B of the side surface portion 46 is smaller than the width dimension bx1 of the second side surface portion 46 shown in Fig. 2 . In other words, in the corner post 4B, the width dimension by1B of the first side surface portion 45 and the width dimension bx1B of the second side surface portion 46 also satisfy the formula (1).

Next, in FIG. 5, the corner post 4C has the first connecting portion 41, the second connecting portion 42, the first protruding surface portion 43, the second protruding surface portion 44, the first side surface portion 45, and the second side surface which are substantially the same as the corner post 4 described above. In the portion 46, the plane cross section is formed in an approximately Ω shape. The front end corner portion 40 is formed with a curved surface that is recessed to the inner side, and a concave end surface portion 50 is formed in place of the inclined side surface portion 47 and the front end convex curved surface portion 53. The third corner portion 40A is formed with a curved surface that is recessed to the inner side. Degaussed corner In the fourth portion 40B, a concave chamfered portion 55 which is chamfered by a curved surface which is recessed to the inner side is formed. In other words, 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 the corner post 4C, the front end concave curved surface portion 53 and the concave deangulated portions 54 and 55 are formed, and the width dimension by1C of the first side surface portion 45 is smaller than the width dimension by1 of the first side surface portion 45 shown in Fig. 2, The width dimension bx1C of the side surface portion 46 is smaller than the width dimension bx1 of the second side surface portion 46 shown in Fig. 2 . In other words, in the corner post 4C, the width dimension by1C of the first side surface portion 45 and the width dimension bx1C of the second side surface portion 46 also satisfy the formula (1).

In the sixth drawing, the corner post 4D has the first connecting portion 41, the second connecting portion 42, the first protruding surface portion 43, the second protruding surface portion 44, the first side surface portion 45, and the second portion which are substantially the same as the corner post 4 described above. The side surface portion 46 and the inclined side surface portion 47 have a plan cross section formed in an approximately Ω shape. A convex chamfered portion 51 is formed in the third corner portion 40A, and a convex chamfered portion 52 is formed in the fourth corner portion 40B. In other words, 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 the corner post 4D, the width dimension by1D of the first side surface portion 45, the width dimension bx1D of the second side surface portion 46, and the width dimension of the inclined side surface portion 47 also satisfy the formula (1).

Next, in FIG. 7, the corner post 4E has the first connecting portion 41, the second connecting portion 42, the first protruding surface portion 43, the second protruding surface portion 44, the first side surface portion 45, and the second portion which are substantially the same as the corner post 4 described above. The side surface portion 46 and the inclined side surface portion 47 have a plan cross section formed in an approximately Ω shape. The first protruding surface portion 43 is a slanted first protruding surface portion 43A that is inclined from the first connecting portion 41 toward the outer side and the front end corner portion 40. which is, In the corner post 4 shown in Fig. 2, the angle between the first protruding surface portion 43 and the first side surface portion 45 is substantially 90 degrees, and in the corner post 4E shown in Fig. 7, the first protruding surface portion 43A and the first side surface The portion 45 formed by the portion 45 has an angle of more than 90 degrees. The second projecting surface portion 44 is a slanted second projecting surface portion 44A that is inclined from the second connecting portion 42 toward the outer side and the front end corner portion 40. In other words, in the corner post 4 shown in Fig. 2, the angle between the second protruding surface portion 44 and the second side surface portion 46 is substantially 90 degrees, and in the corner post 4E shown in Fig. 7, the second protruding surface portion 44A and the 2 The side portion 46 constitutes an angle α2 exceeding 90 degrees. In the corner post 4E, the width dimension by1E of the first side surface portion 45 is smaller than the width dimension of the first side surface portion 45 shown in FIG. 2 by forming the inclined side surface portion 47, the inclined first protruding surface portion 43A, and the inclined second protruding surface portion 44A. By1, 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. 2 . In other words, in the corner post 4E, the width dimension by1E of the first side surface portion 45, the width dimension bx1E of the second side surface portion 46, and the width dimension bxyE of the inclined side surface portion 47 also satisfy the formula (1). Further, the width dimension bx3 of the inclined first protruding surface portion 43A and the width dimension by3 of the inclined second protruding surface portion 44A also satisfy the formula (1).

In the eighth diagram, the corner post 4F has the first connecting portion 41, the second connecting portion 42, the first protruding surface portion 43, the second protruding surface portion 44, the first side surface portion 45, and the second portion which are substantially the same as the corner post 4 described above. The side portion 46 has a plane cross section formed in an approximately Ω shape. The inclined side surface portion 47 is omitted, and an intermediate curved portion 56 bent to the inner side is formed at an intermediate position of the first side surface portion 45, and an intermediate curved portion 57 bent to the inner side is formed at an intermediate position of the second side surface portion 46. In the corner post 4F, the first side surface portion 45 is divided into two by the intermediate curved portions 56 and 57. The width dimension by4F and the width dimension by5F of the first side surface portion 45A are smaller than the first side surface portion shown in FIG. The width dimension by1 divides the second side portion 46 into 2 The width dimension bx4F and the width dimension bx5F of the divided second side surface portion 46A are smaller than the width dimension bx1 of the second side surface portion 46 shown in Fig. 2 . In other words, in the corner post 4F, the width dimensions by4F and by5F of the first side surface portion 45A and the width dimensions bx4F and bx5F of the divided second side surface portion 46A also satisfy the formula (1).

Next, a modification of the corner fitting of the container 1 for a cargo of the present invention will be described with reference to Fig. 9. Here, in the ninth diagram, the corner fitting 5A of the modification in the case of using the above-mentioned corner post 4A is shown.

The three corner portions on the outer side of the cabinet corner fitting 5A are formed along the shape of the inclined side surface portion 47 formed at the front corner portion 40 of the corner post 4A, and the chamfered portion 5B is formed along the inclination formed at the third corner portion 40A. The shape of the corner portion 48 forms a chamfered portion 5C, and a chamfered portion 5D is formed along the shape of the inclined chamfered portion 49 formed in the fourth corner portion 40B. Since the cabinet corner fitting 5A forms the chamfered portions 5B, 5C, and 5D corresponding to the shape of the corner post 4A, the cabinet corner fitting 5A itself is also lighter, and the weight of the cargo container 1 can be reduced.

Here, it is shown that the corner post 4A shown in FIG. 3 is used to form the chamfered portion in the cabinet corner fitting 5A, and the cabinet corner fitting 5 of FIG. 2, FIG. 4 to FIG. 8 can also be formed. Corner.

Example

Hereinafter, the result of reviewing the member endurance of the corner post will be described for the container 1 for a cargo to which the present invention is applied.

Here, the cargo container 1 to which the present invention is applied is taken as an example, and a cargo container having a corner column having a conventional configuration is used as a comparative example, and FEM analysis of each container is performed to calculate the member endurance of the corner post. In addition, the FEM analysis model uses to divide each container into four on the plane and set the symmetry at the boundary. Conditions, and a model of local buckling may be considered for each component element including a corner post. Moreover, the analysis conditions are based on the test load conditions of Test No. 1 (Stacking) of ISO1496-1, not only the distribution load is given on the bottom plate, but also the vertical load from the stacked upper container in the corner fixture. To make this vertical load gradually increase. The stresses of the various parts up to the local buckling at this time and the vertical displacement of the load were investigated.

Example

The embodiment uses the corner post 4 shown in Fig. 2. The corner drop strength F of the corner post 4 is 700 MPa, and the thickness t of the corner post 4 is 3.6 mm. Further, the width dimension bx0 of the fixture portion in the X direction of the corner post 4 is 149 mm, the width dimension by0 of the fixture portion in the Y direction is 168 mm, and the width dimension by1 of the first side surface portion 45 is 100 mm (the width dimension by 2 is 68 mm). 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 members as those of the embodiment were used except that the corner post 400 shown in Fig. 10 was used. The material of the corner column 400 of the comparative example has a material drop strength F of 700 MPa, and the thickness t of the corner column 400 is 3.6 mm. Further, the corner post 400 has the first connecting portion 410, the second connecting portion 420, the first protruding surface portion 430, the second protruding surface portion 440, the first side surface portion 450, and the second side surface portion 460, and has a substantially Ω-shaped cross section. 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 fixture portion 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 harness portion is equal to the width dimension of the face in each direction, the width of the face of the first side face portion 450 is 168 mm, and the width dimension of the second side face portion 460 is 149mm.

Fig. 11 shows the von Mises stress contour map and the deformation map of the analysis results of the examples, and Fig. 12 shows the von Mises stress distribution map and the deformation map of the analytical results of the comparative examples. Further, a graph showing the load-deformation relationship between the examples and the comparative examples is shown in Fig. 13.

In the corner post 4 of the embodiment, as shown in Fig. 11, no local buckling is observed on the first side surface portion 45 and the inclined side surface portion 47, and as shown in Fig. 13, even if the predetermined required endurance (ISO-specified endurance) is exceeded, Endurance is still rising steadily.

On the other hand, in the corner post 400 of the comparative example, as shown in FIG. 12, local buckling occurs in the first side surface portion 450 and the second side surface portion 460. As a result, as shown in Fig. 13, it is understood that the rigidity of the load-deformation relationship is lowered before the predetermined required endurance is reached, and the endurance is rapidly lowered, and the endurance is not expected to rise.

Next, Table 1 shows the degree of change in the width dimension of each face along with the change in the shape of the inclined side surface portion of the corner post 4 shown in Fig. 2, and the efficiency of the cross section of each face ρ (effective width be (= 740 t / ( √F)) The ratio of the width dimension b). By increasing the width dimensions bx2 and by2 of the projected portions of the inclined side portions, the width dimension bx1 of the second side surface portion 46 and the width dimension by1 of the first side surface portion 45 can be suppressed to be smaller than the effective width be, but when bx2 and by2 When it is too large, the width dimension bxy of the inclined side surface portion 47 exceeds be, and this efficiency is lowered.

That is, while considering the width dimension of each face, the width dimension b, the thickness t, and the material lodging strength F of the face are set to at least the face having the largest width dimension, the thickness t of the corner post, the width dimension b of the face, and the material of the corner post. The relationship of the lodging strength F satisfies the relationship of b ≦ 740 t / (√ F). Because of this, It is possible to ensure the endurance of the member for compressing the load and to reduce the cross-sectional area, so that the corner column itself can be lightened and the endurance can be improved. There was no detachment, and the result was no problem.

The present invention is not limited to the above-described embodiments, and includes other configurations and the like which can achieve the object of the invention, and the modifications and the like described below are also included in the present invention.

For example, in the foregoing embodiment, the material fall strength F of the steel for the corner post is exemplified by 700 MPa, and the material fall strength is not limited to 700 MPa. Moreover, the material drop strength is not limited to the specification strength, and may be set according to the actual strength. In the cross-sectional view of the corner column of Fig. 2 to Fig. 10, the bending R (usually the center radius of the plate thickness, R = 1.5t~2.5t) which is formed by the forming process of the corner post is omitted, and is displayed when there is a bend. When folding R, the starting point and ending point of R can be used as the starting point to set the size of the width of the face.

Further, the best structures, methods, and the like for carrying out the present invention have been disclosed in the above description, but the present invention is not limited thereto. In other words, the present invention has been specifically described with reference to the specific embodiments, and the embodiments described above are in terms of shapes, materials, and quantities, without departing from the technical spirit and scope of the present invention. In other detailed structures, the manufacturer can add various modifications.

Therefore, the description of the shapes, materials, and the like described above is intended to be illustrative of the present invention and is not limited to the inventors. Therefore, it is not limited to a part or all of the limitations of the shapes, materials, and the like. The description of the component names is included in the present invention.

1‧‧‧Container container

2‧‧‧ side panel

3‧‧‧ front and rear panels

4,4A-4F, 400‧‧‧ corner column

5,5A‧‧‧ corner fittings

5B-5D‧‧‧To the corner

6‧‧‧ top panel

40‧‧‧ front corner

40A‧‧‧3rd corner

40B‧‧‧4th corner

40C‧‧‧1st corner

40D‧‧‧2nd corner

41,410‧‧‧1st connection

42,420‧‧‧2nd connection

43,430‧‧‧1st protruding face

43A‧‧‧Tilt the first prominent face

44,440‧‧‧2nd prominent face

44A‧‧‧Tilt the second protruding face

45,450‧‧‧1st side

45A‧‧‧Dividing the first side

46,460‧‧‧2nd side

46A‧‧‧Dividing the second side

47‧‧‧Slanted side

48,49‧‧‧Slanted to the corner

50‧‧‧ convex curved surface

51,52‧‧‧ convex decorner

53‧‧‧ front end concave curved surface

54,55‧‧‧ concave decorn

56,57‧‧‧Intermediate bend

Width of the x-direction of the bx0‧‧‧ corner column

By0‧‧‧width dimension of the corner of the corner

By1, by1A-by1E‧‧‧ width dimension of the first side

Bx1, bx1A-bx1E‧‧‧ width dimension of the second side

Bxy, bxyA, bxyD, bxyE‧‧‧ Width of the inclined side

Bx2‧‧‧width dimension of the projected portion of the inclined side

By2‧‧‧width dimension of the projected portion of the inclined side

Bx3‧‧‧The width dimension of the 1st protruding face

By3‧‧‧The width dimension of the 2nd protruding face

By4F, by5F‧‧‧Dividing the width dimension of the first side

bx4F, bx5F‧‧‧divided the width dimension of the second side

t‧‧‧The thickness of the corner post

α 1, α 2‧‧‧ angle

Fig. 1 is a perspective view of a container for goods according to an embodiment of the present invention.

Figure 2 is an enlarged cross-sectional view of the corner post and cabinet corner of the container for cargo in Figure 1.

Fig. 3 is an enlarged cross-sectional view showing a modification of the corner post.

Fig. 4 is an enlarged cross-sectional view showing another modification of the corner post.

Fig. 5 is an enlarged cross-sectional view showing another modification of the corner post.

Fig. 6 is an enlarged cross-sectional view showing another modification of the corner post.

Fig. 7 is an enlarged cross-sectional view showing another modification of the corner post.

Fig. 8 is an enlarged cross-sectional view showing another modification of the corner post.

Fig. 9 is an enlarged cross-sectional view showing a modification of the cabinet corner fitting.

Figure 10 is an enlarged cross-sectional view showing a conventional corner post.

Fig. 11 is a view showing the results of FEM analysis of the embodiment of the present invention.

Fig. 12 is a view showing the results of FEM analysis of the comparative example of the present invention.

Fig. 13 is a graph showing the load-deformation relationship of the analysis results of the foregoing examples and comparative examples.

2‧‧‧ side panel

3‧‧‧ front and rear panels

4‧‧‧ corner column

5‧‧‧ cabinet angle fixture

40‧‧‧ front corner

40A‧‧‧3rd corner

40B‧‧‧4th corner

40C‧‧‧1st corner

40D‧‧‧2nd corner

41‧‧‧1st connection

42‧‧‧2nd connection

43‧‧‧1st protruding face

44‧‧‧2nd protruding face

45‧‧‧1st face

46‧‧‧2nd side

47‧‧‧Slanted side

Width of the x-direction of the bx0‧‧‧ corner column

By0‧‧‧width dimension of the corner of the corner

By1‧‧‧The width dimension of the 1st side section

Bx1‧‧‧2nd side section width dimension

Bxy‧‧‧Slanted side width dimension

Bx2, by2‧‧‧ Width of the projected portion of the inclined side

t‧‧‧The thickness of the corner post

Claims (8)

A container for goods, comprising: a rectangular bottom plate; a pair of side panels and a pair of front and rear plates, formed by bending a steel plate, and erected on the four sides of the bottom plate; a plurality of corner posts, An erecting portion is disposed at a corner of the bottom plate, and is connected between a side edge portion of the side panel and a side edge portion of the front and rear panels; and a corner fitting is disposed at an upper end and a lower end of the equiangular column; The panel is connected to the side panel and the upper edge of the front and rear panels; the container for cargo is characterized in that it has an open cross-sectional shape when the corner post is viewed in a plane cross section, and the open cross-sectional shape is a first connecting portion connected to a side edge portion of the side panel, a second connecting portion connected to a side edge portion of the front and rear plates, and a second connecting portion connected to the first connecting portion and crossing the surface direction of the side panel a first protruding surface portion that is provided in a direction along the first side of the corner fitting, is connected to the second connecting portion, and protrudes in a direction intersecting the surface direction of the front and rear plates, and along the cabinet The second protrusion of the second side of the corner fixture Section, is directly provided on the first projecting portion, and extends toward the direction of the plane of the side panels, and the side surface of the first portion of the third side is provided along the harness connector of the cabinet through the corner portion and the angle of the first side, Provided directly on the second protruding surface portion, extending toward the front surface of the front and rear plates, and the second side surface portion and the splicing portion provided along the fourth side of the transmission corner portion connected to the second side of the corner device The first side surface portion and the second side surface portion are formed adjacent to a corner portion of the third side and the fourth side, and a front end corner portion is formed, and the first connecting portion and the first protruding portion are connected to each other a width dimension in a vertical direction of the second side surface portion from the corner portion to the second side surface portion, and a second corner portion from the second connection portion and the second protruding portion to the first side surface portion Among the width dimensions in the vertical direction of the first side surface portion, the relationship between the minimum width dimension b0, the thickness t of the corner post and the material fall strength F of the corner post satisfies b0>740t/(√F), and the front end The corner portion is provided with an inclined side surface portion that is continuous with both the first side surface portion and the second side surface portion, and a width dimension of the first side surface portion, the second side surface portion, and the inclined side surface portion b, the thickness t of the aforementioned corner column and the material of the corner column F yield strength satisfy the relationship b ≦ 740t / (√F). The container for goods according to claim 1, wherein a chamfered portion is formed at a corner of the corner fitting along the shape of the inclined side surface portion. The container for goods according to claim 1, wherein the front end corner portion is formed with a convex curved surface portion facing the outer side to form a front end convex curved surface portion or a concave curved surface portion facing the inner side to form a front end concave curved surface portion. The container for goods of claim 3, wherein the shape of the convex curved surface portion or the concave curved surface portion of the front end is installed in the cabinet corner The corner portion is formed with a corner portion. The container for goods according to any one of claims 1 to 4, wherein the third protruding portion that is continuous with the first side surface portion and the second protruding portion and the second side surface portion are connected to each other At least one of the fourth corner portions is formed with a chamfered portion that chamfers the corner portion at an inclined surface, a convex chamfer portion that deviates the corner portion toward a convex curved surface toward the outer side, and the corner portion is Any one of the concave dehorns of the concave curved surface facing the inner side. The container for goods according to claim 5, wherein a chamfer is formed at a corner of the corner fitting along the shape of the inclined chamfered portion, the convex chamfered portion or the concave deangulated portion. unit. The container for a cargo according to the first aspect of the invention, wherein the first protruding surface portion is an inclined first protruding surface that protrudes obliquely from the first connecting portion toward the outer side and the distal end portion, and the second protruding surface portion serves as a slave The second connecting portion is inclined toward the outer side and the front end portion, and the second protruding surface portion is inclined. The container for goods according to claim 7, wherein 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.