JPH07315485A - Reinforcing structure of corner fitting of container - Google Patents

Abstract

PURPOSE:To increase the strength of the joints of an intermediate header that connects intermediate corner fittings of a continuous container and eliminate the need of reinforcing gussets to increase cargo space inside the container. CONSTITUTION:An intermediate header 22 is connected to an intermediate corner fitting 2 and a wide U-shaped thin channel plate 222 is situated under the intermediate header 22. The width W of the channel plate 222 is made larger than the width w of the intermediate corner fitting 2 and ends of the channel plate 222 are welded on an upper reinforcing plate 31 to increase the strength. As a result, a reinforcing gusset that has been attached to the joints between the intermediate corner fitting 2 and the intermediate header 22 hitherto becomes unnecessary, allowing fully using the space inside a container.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container corner metal fitting reinforcing structure for strengthening a corner metal fitting suspended from a crane when loading a long rectangular parallelepiped container.

[0002]

2. Description of the Related Art A rectangular box-shaped container unitized into a unit is widely used for transportation of cargo, and in this type of container, it is hung from a crane to a corner fitting provided at a corner on the roof side. With the tightening claws engaged, cargo handling for freight cars and ships is performed.

For a container of 45 feet or 48 feet, which is longer than the ISO standard 40 foot container, as shown in FIG.
An intermediate corner metal fitting 2 is provided at a position corresponding to the position of the corner metal fitting of the foot container.

The corner metal fittings 1 and the intermediate corner metal fittings 2 at such end portions are connected to each other by end columns 11 and intermediate pillars 21 having high strength in the longitudinal direction, and between the lateral corner metal fittings 1. The header 12 and the intermediate corner metal fittings 2 are rigidly connected to each other by using the intermediate header 27. When the cargo is loaded, the clamps from the crane lock the intermediate corner metal fittings 2 so that the container is loaded.

Welding is performed at the joint between the header, end pillar, and intermediate pillar of such a container, and the corner fitting and intermediate corner fitting.
It has a structure that prevents the ingress of rainwater, and when the containers are hoisted during cargo handling or when they are stacked,
Since the middle corner metal fitting receives the entire load of the container including the cargo, a triangular gusset is welded to the joint between the middle corner metal fitting and the middle pillar as a reinforcing member.

Here, such a gusset will be described with reference to the drawings. FIG. 5 is a sectional view taken along the cutting line CC in FIG. 4 described above, and FIG. 6 is from the direction of arrow D shown in FIG. FIG. 3 is a configuration diagram viewed from above, and on the side surface of the intermediate corner metal fitting 2, an upper reinforcing member 31 of a structural member parallel to the longitudinal direction of the container is provided.
Is welded, a box-shaped intermediate column 21 is welded below the intermediate corner metal fitting 2, and the box section 28 has a cross section between the intermediate corner metal fitting 21 and the intermediate corner metal fitting in the width direction of the container.
The intermediate header 27 having is connected by welding.

In such a structure, when the container is hung by the intermediate corner metal fittings, as shown in FIG. 7, the hoisting point of the intermediate corner metal fitting 2 of the container having the load Q and the intermediate pillar 21 are mutually opposed. Due to the displacement, the container is deformed as shown by the broken line, and a large stress is generated at the point P shown in the figure. Therefore, at the point P, that is, inside the joint between the intermediate corner metal fitting 2 and the intermediate column 21 as shown in FIGS. 5 and 6,
A triangular gusset 30 made of thick steel material is welded for reinforcement.

[0008]

The gusset welded between the above-mentioned intermediate corner metal fitting and the intermediate column can improve the strength of the joint between the two, but inside the container, the triangular shape of the gusset is upward. There is a drawback that the load capacity corresponding to the width of the protruding portion is substantially reduced during the protruding and loading operations.

The present invention seeks to remedy such conventional problems, the purpose of which is to increase the strength of an intermediate header coupled to an intermediate corner fitting in a long container and to eliminate reinforcing gussets. By doing so, it is to provide a reinforcing structure for a container corner fitting that intends to expand the space inside the container.

[0010]

In order to achieve the above-mentioned object, according to the present invention, a long rectangular parallelepiped box-shaped container is provided between corner fittings at the corners, and the two facing each other in the width direction are provided. A reinforcing structure for a container corner fitting, comprising: an intermediate corner fitting joined by an intermediate header; and a reinforcing gusset provided at a joining portion between the intermediate corner fitting and a lower intermediate pillar. The width of the container is formed larger than the width of the connecting surface with the middle corner metal fitting to connect the end part to the reinforcing material of the side wall, and the reinforcing structure of the container corner metal fitting without the reinforcing gusset is provided. The upper and lower dimensions of the large-sized intermediate header do not change, and since the conventional reinforcing gussets are removed, a reinforcing structure of the container corner metal fitting that can widely use the space inside the container is provided.

[0011]

[Operation] Since the width dimension of the box-shaped cross section of the intermediate header that is connected to the middle corner metal fitting of the container is formed to be larger than the width of the middle corner metal fitting and is connected to the upper reinforcement, the vertical load when suspending the container The bending moment applied to the joint between the intermediate corner metal fitting and the intermediate column caused by the above can be reduced, and since the reinforcing gusset is removed, the substantial internal volume of the container is increased.

[0012]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 is a perspective view of a joint structure of an intermediate corner metal fitting showing an embodiment of a reinforcing structure of a container corner metal fitting according to the present invention, and FIG. 2 is a sectional view taken along the cutting line AA shown in FIG. 3 is a configuration diagram as seen from the direction of arrow B shown in FIG. 2, and the same parts as those in FIGS. 5 and 6 are designated by the same reference numerals.

Reference numeral 22 in these drawings denotes an intermediate header, which is a structural material provided between the intermediate corner metal fitting 2 and the intermediate corner metal fitting facing in the width direction thereof. A wide U-shaped groove plate 222 is welded.

Then, as shown in FIG. 3, the width W of the groove plate 222 is
Is formed to be wider than the width w of the intermediate corner metal fitting 2, and all the joint portions of the intermediate header 22 and the intermediate corner metal fitting 2 and the upper reinforcing member 31 are firmly joined by welding.

Reference numeral 23 denotes a roof rail mounted in the longitudinal direction of the container, which is riveted along the upper reinforcing plate 31, and has an outer panel 24 on the outer surface 231 and an upper surface 232.
The roof panel 25 is attached to the rivet by rivets. The roof panel 25 in the portion where the upper surface portion 232 and the upper reinforcing plate 31 overlap is riveted through the upper reinforcing plate 31.

Next, the operation of the present embodiment thus constructed will be described. As shown in the configuration diagram of this embodiment shown in FIG. 3, the intermediate header 22 joined to the inner side surface of the intermediate corner metal fitting 2
Since the width W of the cross section of the intermediate corner metal fitting 2 is made larger than the width w of the intermediate corner metal fitting 2 and the contact portion between the intermediate corner metal fitting 2 and the intermediate header 22 is welded, when the container is suspended by the claw holes of the intermediate corner metal fitting 2. Therefore, the bending moment of the joint portion that occurs in the container is reduced, and therefore, the deformation of the container at the time of loading and unloading can be prevented even without the gusset for reinforcing the space between the intermediate corner metal fitting 2 and the intermediate column 21.

Although the width of the groove plate 222 of the intermediate header 22 is larger than that of the conventional one, the thickness of the groove plate 222 is almost unchanged, so that the space in the ceiling portion of the container is not reduced.
Furthermore, since the reinforcing gusset is removed, the internal space of the container can be fully utilized.

[0018]

As described above, according to the present invention, the width dimension of the box-shaped cross section of the intermediate header coupled to the intermediate corner metal fitting of the container is made larger than the width of the intermediate corner metal fitting to increase the strength. As a result, since the reinforcing gusset is unnecessary, there is no obstructive protrusion due to the gusset inside the container, and there is an effect that the cargo space of the container can be fully utilized.

[Brief description of drawings]

FIG. 1 is a perspective view of a joint structure of an intermediate corner metal fitting showing an embodiment of a reinforcing structure of a container corner metal fitting of the present invention.

FIG. 2 is a cross-sectional view taken along the line AA of FIG.

FIG. 3 is a configuration diagram as viewed in the direction of arrow B shown in FIG.

FIG. 4 is a perspective view showing an example of a long container.

5 is a cross-sectional view taken along the line C-C in FIG.

6 is a configuration diagram as viewed in the direction of arrow D in FIG.

FIG. 7 is an explanatory diagram showing a state of a container that has been lifted.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Corner metal fitting 2 ... Middle corner metal fitting 21 ... Middle pillar 22 ... Middle header 23 ... Roof rail 24 ... Outer panel 25 ... Roof panel 31 ... Upper reinforcement 221 ... Top plate 222 ... Groove plate

Claims (1)

[Claims] 1. An intermediate corner metal fitting, which is provided between corner metal fittings at the corners of a long rectangular parallelepiped box-shaped container, and which is opposed to each other in the width direction by an intermediate header; In a reinforcing structure for a container corner fitting having a reinforcing gusset provided at a connecting portion with an intermediate pillar, a width dimension of the box-shaped cross section of the intermediate header is formed to be larger than a width of a connecting surface with the intermediate corner fitting. The reinforcing structure of the container corner fitting is characterized in that the above-mentioned reinforcing gusset is removed while the end portion is joined to the intermediate pillar of the side wall.