JP6344757B2 - Container ship - Google Patents

Description

The present invention relates to a container ship having a windshield disposed on a bulwark .

In order to reduce air resistance caused by a group of containers stacked in multiple stages on the bow deck of a container ship, large container ships with windshields on the bow tower deck are in service.

Photograph of container ship RIALTO BRIDGE acquired on the Internet 09-05-22

The windshield described above includes a peripheral side wall that rises vertically from the bow deck and bulwark, and an upwardly convex ceiling wall that covers a horseshoe-shaped space formed by the upper edge of the peripheral side wall, and is located behind the ceiling wall. The end is positioned at substantially the same height as the top of the front row of container groups stacked in multiple stages on the bow deck of the container ship.
An object of this invention is to provide the container ship by which the bow part windshield whose structure was simple compared with the past was arrange | positioned on bulwark .

In order to solve the above problems, in the present invention, a peripheral side wall that rises vertically from the top of the bulwark and whose upper edge extends obliquely upward from the front end toward the rear end, along the upper end of the peripheral side wall and A bow windshield having a top wall with a predetermined width extending over the entire length of the upper edge of the peripheral side wall on the inner side of the upper edge of the peripheral side wall as viewed from above is disposed on the bulwark. Provide container ship .
In the container ship according to the present invention, the upper edge of the windshield peripheral side wall, and thus the top wall, extends obliquely upward from the front end to the rear end, that is, from the bow side end to the stern side end. The air flow from the front of the bow is directed to the top wall and directed obliquely upward. As a result, the interference between the front row of container groups located behind the windshield and the air flow from the front of the bow is suppressed, and the air resistance due to the container groups loaded in multiple stages on the bow deck of the container ship is reduced.
In the container ship according to the present invention, instead of the ceiling wall covering the horseshoe-shaped space formed by the upper edge of the peripheral side wall provided in the conventional windshield, the upper edge of the peripheral side wall along the upper edge of the peripheral side wall and in the top view Since the top wall having a predetermined width extending over the entire length of the upper edge of the peripheral side wall is disposed inside, the structure of the windshield is simplified as compared with the prior art.

In a preferred embodiment of the present invention, the top wall of the bow windshield is directed obliquely upward inward in the radial direction when viewed from above.
Since the top wall of the bow windshield is directed obliquely upward inward in the radial direction when viewed from above, the air flow from obliquely forward of the bow is also directed obliquely upward along the windshield top wall. As a result, the interference between the front row of container groups located behind the windshield and the air flow from obliquely forward of the bow is suppressed, and the air resistance due to the container groups stacked in multiple stages on the bow deck of the container ship is further reduced.
In a preferred embodiment of the present invention, the top of the front row of container groups stacked in multiple stages on the bow deck is positioned at a height equal to or less than the height of the rear edge of the upper edge of the peripheral windshield .
A height equal to or less than the height of the rear edge of the upper edge of the windshield around the windshield extending diagonally upward from the front edge to the rear edge of the top row of container groups stacked in multiple stages on the bow deck By positioning to the front, the interference between the front row of containers located behind the windshield and the air flow from the bow front or diagonally forward of the bow is further suppressed, and the air resistance reduction effect is increased.

According to the present invention, there is provided a container ship in which a bow windshield having a simple structure as compared with the conventional one is disposed on a bulwark .

It is a perspective view of the bow part of the container ship which concerns on the Example of this invention, and a bow part windshield.

A container ship according to an embodiment of the present invention will be described.
As shown in FIG. 1, a horseshoe-shaped peripheral side wall 1 a in a top view standing up vertically from the top 100 a over the entire length of the top 100 a of the bow bulwark 100 of the container ship A, and from the front end to the rear end, that is, the bow The total length of the peripheral side wall upper edge 1a ′ along the upper edge 1a ′ of the peripheral side wall 1a extending obliquely upward from the side end toward the stern side end and inside the peripheral side wall upper edge 1a ′ in a top view. A windshield 1 including a top wall 1b having a predetermined width extending inward and obliquely upward inward in the radial direction in a top view is joined to the bulwark 100. The width of the top wall 1b is set to a value sufficient to avoid interference between the fore mast 200 standing at the bow and the top wall 1b.
The top wall 1b is formed of a relatively simple single curved surface such as a part of a conical surface or a part of a spherical surface.
The rear end of the peripheral side wall upper edge 1a ′ is positioned at a height equal to or higher than the top of the foremost container group 300 stacked in multiple stages on the bow deck of the container ship A.
The windshield 1 is made of a steel plate, and is welded to the top portion 100 a of the bow bulwark 100.

In the bow portion windshield 1 of the container ship A according to the present embodiment, the upper edge 1a ′ of the windshield circumferential side wall and the top wall 1b are directed from the front end toward the rear end, that is, from the bow end to the stern end. Therefore, the air flow from the front of the bow is guided to the top wall 1b and directed obliquely upward. As a result, the interference between the front row of container groups 300 behind the windshield and the airflow from the front of the bow is suppressed, and the air resistance due to the container groups stacked in multiple stages on the bow deck of the container ship is reduced.
Since the top wall 1b is directed obliquely upward inward in the radial direction when viewed from above, the air flow from obliquely forward of the bow is also directed obliquely upward along the windshield top wall 1b. As a result, the interference between the front row of container groups 300 located behind the windshield and the air flow from the front of the bow obliquely is suppressed, and the air resistance due to the container groups 300 stacked in multiple stages on the bow deck of the container ship is further reduced. To do.
The rear end of the peripheral side wall upper edge 1a ′ extending obliquely upward from the front end to the rear end is equal to or higher than the top of the container group 300 in the foremost row stacked on the bow deck of the container ship. By positioning, the interference between the front row of container groups 300 located behind the windshield and the air flow from the bow front or diagonally forward of the bow is further suppressed, and the air resistance reduction effect is increased.
In the bow portion windshield 1 of the container ship A according to the present embodiment, instead of the ceiling wall covering the horseshoe-shaped space formed by the upper edge of the peripheral side wall provided in the conventional windshield, along the peripheral side wall upper edge 1a ′. In addition, since the top wall 1b having a predetermined width extending over the entire length of the peripheral side wall upper edge 1a 'is disposed inside the peripheral side wall upper edge 1a' when viewed from above, the structure of the windshield 1 is simpler than that of the prior art. It has become.
The top wall 1b is a relatively simple curved surface and contributes to simplification of the structure of the windshield 1.

Instead of a curved surface such as a conical surface or a spherical surface, the top wall 1b may be composed of a single flat surface extending obliquely upward from the front end toward the rear end.
Instead of forming the top wall 1b with a part of a single curved surface or a single plane, the top wall is formed so as to form an aggregate of a plurality of curved surfaces or planes adjacent to each other in the circumferential direction and / or the radial direction. 1b may be formed. The top wall 1b needs to extend obliquely upward from the front end toward the rear end, and is preferably directed obliquely upward toward the radially inner side in a top view.

The present invention can be widely used to reduce the air resistance of container ships.

DESCRIPTION OF SYMBOLS 1 Windshield 1a Peripheral side wall 1a 'Peripheral side wall upper edge 1b Top wall 1b' Top wall rear end A Container ship 100 Bull work 100a Top part of bulwark 200 Fore mast 300 The frontmost container group

Claims (3)

A peripheral side wall that rises vertically from the top of the bulwark and has an upper edge extending obliquely upward from the front end toward the rear end; and along the upper side edge of the peripheral side wall and inside the upper edge of the peripheral side wall as viewed from above. A container ship characterized in that a bow windshield having a top wall of a predetermined width extending over the entire length of the upper edge of the side wall is disposed on the bulwark. The container ship according to claim 1, wherein the top wall of the windshield is directed obliquely upward inward in the radial direction when viewed from above . The top of the front row of containers loaded in multiple stages on the bow deck is positioned at a height equal to or less than the height of the rear edge of the upper edge of the peripheral side wall of the windshield. 2. Container ship described in 2 .

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