KR20050065969A - Non-bracket container stool supporting structures of large containership - Google Patents

Abstract

The present invention generally relates to a substructure of a container stool used for safely loading containers in a container ship, and more specifically, the lower part of a container stool is a container stool. The present invention relates to a method of removing a lower reinforcement bracket of a container stool used to effectively support a lateral load such as a container force acting on the container stool, and thus a container stool lower reinforcement structure.

The present invention provides a stable container stool substructure even if the container itself is enlarged and the deck thickness becomes very thick, so that the deck itself contributes to such lateral loads, even when the bracket under the container stool is removed. It is about reinforcement plan to construct

The present invention provides a container stool by partially modifying the structure of a container stool in a large container ship and partially reinforcing a transverse floor under the container stool from mild steel to high tensile steel. The technical gist of the container stool infrastructure which can support the lateral loads caused by the various container forces acting on the container stool efficiently without installing the bracket at the bottom of the Shall be.

Description

Non-bracket container stool supporting structures of large containership}

The present invention relates to a non-bracket reinforcement structure under a large container ship container stool, and more particularly, to a part of the structure of the container stool of a large container ship and partially to a transverse floor under the container stool. By reinforcing from mild steel to high tensile steel, the present invention relates to a substructure of a container stool capable of supporting lateral loads caused by various container forces acting on the container stool efficiently without installing a bracket under the container stool.

Currently, container ships use container stools 4 and 5 on upper decks 1 as shown in FIGS. 1 and 2 to safely load containers. The lower part is reinforced by using the bracket 10 uniformly. The container stools 4 and 5 are members that contribute to the lateral strength, which is an external force such as a wave given from the side of a ship or a force capable of withstanding loads of cargo in a hold, and is usually the outermost on the upper deck 1 of a container ship. It will be located at the end of the 20 and 40 foot or 45 foot containers.

Container stools (4, 5) are usually divided into a closed type (open type) and an open type (open type), in the case of the open type is divided into two types, the assembly structure of the H-shaped column or the assembly structure using a square pipe.

Representative loads applied to the container stools (4, 5) are the weight of the container, lashing force (compression force), compression force (racking force), wind force (wind force), etc. Lateral load components include the horizontal component of the lashing force, the racking force and the wind force.

Generally, container stools on container ships use one box type stool (8) for 20ft container stools in the middle of the hatch and such onebox for 40ft or 45ft container stools between hatches and hatches. Two box type stool (9), which is a type of two type stools attached, is mainly used.

Therefore, considering the structure of the container stool, two container boxes are loaded on the bottom of the container stool on the 20 foot container stool 4 having one transverse floor 7 there. The load condition will be much more severe in terms of load conditions than if a 40 or 45 foot container box is loaded on a 40 foot or 45 foot container stool with a double transverse floor (7). Therefore, it is reasonable to consider the structural strength of the 20-foot container stool 4 and its substructure mainly in terms of design safety.

In general, in order to more effectively support the local stress concentration and shear load generated on the lower stool and the upper deck 1 by the lateral load transmitted to the container stool, it is correlated with the thickness of the upper deck 1 as shown in FIG. Bracket 10 is uniformly arranged and reinforced under the container stool.

The present invention has been made to solve the above problems, the structure of the 20-foot container stool (4) which is subjected to a much more severe load in terms of the load conditions acting on the container stool substructure in large container ships. By changing the transverse floor (7) in the lower part of the container stool from mild steel to high-strength steel, the lower part of the container stool installed on the upper deck (1) of the large container ship without uniformly reinforcing the bracket (10). The lateral load transmitted to the container stool can more effectively support the local stress concentration and shear load generated between the lower stool and the upper deck 1.

In order to achieve the above object, the present invention provides a container stool substructure that can support lateral loads caused by various loads acting on the container stool, wherein the structure of the container stool is partially changed and a transverse floor (7). By partially reinforcing steel from high strength steel to high strength steel, it is possible to support lateral loads due to various loads acting on the container stool without installing the bracket 10 on the bottom of the container stool. It's about structure.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail.

FIG. 3 shows a conventional 20 foot container container stool, FIG. 4 shows a modified 20 foot container container stool, and FIG. 5 shows a reinforced large container ship container stool substructure without reinforcing brackets. .

As shown in FIG. 3, a 20-foot container stool 4, which is a conventional one box type stool 8, which is subjected to a much more severe loading condition in terms of load conditions in a large container ship, is shown in FIG. By changing to a wider one box type stool (13) at the bottom of the stool, the lateral load delivered to the bottom of the 20 foot container stool (4) can be reduced, thereby reducing the container stool bottom and upper deck. Local stress concentration in the phase (1) can be reduced. Instead of removing the lower bracket of the container stool, the material of the portion of the transverse floor 7 that accounts for most of the container stool load in the container stool substructure, as shown in FIG. By changing to high tensile strength steel (HT32 or HT36) 12 it is possible to significantly reduce the stress level of the container stool substructure.

The detailed arrangement of the modified 20 foot container stool substructure and the 40 foot container stool substructure are shown in FIGS. 6 and 7, respectively.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes are intended to fall within the scope of the claims.

The effects of the present invention that can be expected by the configuration and action as described above are as follows.

By using the present invention, the container stool structure is changed in part from the structural point of view, and a large container ship by partially reinforcing the transverse floor 7 under the container stool from mild steel to high tensile steel (HT32 or HT36) It is possible to efficiently support the lateral load due to various container loads acting on the container stool efficiently without installing a bracket at the bottom of the container stool.

By using the present invention, it is possible to save material and work time required for installing the bracket on the lower part of the container stool from the economical point of view, and to advantageously utilize the space by removing the bracket, and additionally, The possibility of fatigue failure of the hull due to the welding of the bracket to the undercarriage can be eliminated, so the expected economic value and structural stability are greatly improved.

1 is a conventional containership container stool structure,

2 is a container ship container stool substructure in which reinforcing brackets are used,

3 shows a conventional container stool for a 20 foot container,

4 shows a modified container stool for a 20 foot container,

5 is a reinforced large container ship container stool substructure without using a reinforcement bracket,

6 shows a detailed structure of a container stool under a modified 20 foot container;

FIG. 7 illustrates a modified container stool bottom structure for a 40 foot container.

<Description of the symbols for the main parts of the drawings>

(1): upper deck

(2): hatch coaming top

(3): side shell

(4): Stool for 20ft Container

(5): Stool for 40ft Container

(6): Ranji bulkhead

(7): Transverse floor

(8): one box type stool

(9): two box type stool

(10): Lower stool bracket

(11): side shell longi.

(12): high tensile strength steel (HT32, HT36)

(13): modified one box type stool

Claims (2)

In a 20-foot container stool (4), a one box type stool (8) that is subjected to much more extreme loading conditions in terms of load conditions for large container ships. Local stress concentrations on the container stool bottom and upper deck by reducing the lateral load transferred to the lower 20 foot container stool by changing to the wider one box type stool 13 at the bottom of the stool. Non-bracket reinforcement structure under the container stool, characterized by reducing the phenomenon. The method of claim 1, The container stool infrastructure is made by changing the material of a portion of the transverse floor (7), which accounts for most of the container stool load, from normal mild steel to high tensile steel (HT32 or HT36) 12. Non-bracket reinforcement structure under the container stool, which can significantly reduce the stress level of the container.