JP2525206B2 - Yacht bottom equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a ship bottom device for reducing the inclination of a yacht. (Prior Art) A sailboat receives wind from a sail and travels, but Being above the center of gravity, the hull inclines when the sail receives wind. In order to reduce the inclination of the hull, a weight plate is attached to the center of the bottom of the ship. In Fig. 1, the torque around the center of gravity G of the ship as a restoring force, that is, the torque arm.
L3 × weight plate gravity F3, the torque arm L3 does not become large unless the hull is significantly tilted, and the yacht sails with a large tilt as shown in Fig. 1. Such inclination of the current yacht hull is not only dangerous and has bad habitability, but also cannot effectively utilize the wind.

(Problems to be Solved by the Invention) An object of the present invention is to provide a yacht bottom device that reduces the inclination of the hull.

(Means and Actions for Solving Problems) The present invention, as shown in FIGS. 1 and 2, has a flexible weight by a plurality of columns 2, 2-1 and 2-2 extending from the bottom 1 of the ship. Board 3
The present invention relates to a bottom device for a yacht, which is characterized in that This flexible weight plate is constructed so that its downward facing surface swells so that the force of gravity itself causes a restoring force in the hull and that a water flow also causes a restoring force. The structure and operation of this flexible weight plate will be described in detail below. 3 to 6 are horizontal cross-sections of the flexible weight plate. In each case, A is the case where the flexible weight plate is not bent, that is, the hull is horizontal and the flexible weight plate is operated. There are no cases, and B to D show cases where the flexible weight plate is bent or swollen. Lead with a high density or inexpensive steel is suitable for the core material, and elastic steel plate or polymer material with a smooth surface is suitable for the skin material to reduce water flow resistance. The flexible weight plate is the core material 4 and the skin material 5,5 '.
, And both are integrally or separately bent or bulged by various means. For example, when the core material 4 is bent toward the surface facing downward due to its gravity, there are cases shown in Figs. 3 and 4, and in the case of Fig. 3, the core material 4 and the skin materials 5, 5'are integrated. In the case of bending
In the case of FIG. 4, the skin material 5'is not bent.
Another means of the present invention for deflecting the flexible weight plate in this manner is to rotate one or more shafts of the columns 8, 9 in the directions of arrows 6, 7 in FIGS. That is. In this case, the core material is connected to the columns 8 and 9 at the front and rear ends so that the rotational force is transmitted to the core material 4, 4 ', 4 ". The core material is 4', as shown in FIG.
It may be divided into 4 ", or may be appropriately connected to each other in a flexible plate shape. In FIGS. 5B, C and D, the core material 4'is around the support pillar 8'and the core material 4" is around the support pillar 9. It is rotating.
In C, the column 8 is a distance M from the center line 10 of the yacht bottom device.
It is displaced, and in D, the support column 9 is displaced a distance N from the center 10.
When there is a water flow in the direction of arrow 11, that is, when the hull advances in the direction of the upper side of the paper, in C and D, a greater force is generated in the direction of arrow F than in B, but at the same time a lateral flow of the hull occurs in the left side of the paper. , Make a selection considering both effects. In these cases, the rotation axis of the column fixed to the bottom of the boat is 8 ', 8 "or 9', and is connected to the column 8 or 9 by the arm 12. The bottom device of the yacht of the present invention is shown in FIG. As described above, in the ship bottom device equipped with the rotating mechanism of the core member 4, the cam member 14 is rotated by the axial rotation of the support column 13 in addition to the rotation of the core member 4, and the skin material surface of the flexible weight plate is enlarged in a complicated shape. The structure may be such that it is bent or bulged, that is, when the plate surface of the skin material 5 is bulged by a cam 14 as shown in Fig. 6B, a lift F is generated by the water flow in the direction along the bottom axis device central axis 10 of the yacht. This post 13
The shaft may be rotated directly from the inside of the ship or indirectly via the supports 8 and 9.
Further, the yacht bottom device of the present invention has a structure in which the core material 4 is flexed as shown in FIG. 4, or the core material 4 is flexed and the skin material surface 5 of the flexible weight plate is expanded by fluid pressure. The same effect as in the case of FIG. 6 is obtained. In this case, the core material 4 serves as a central partition wall, and a pressure fluid is filled between the left and right skin materials 5 or 5'and the core material, and the left and right sides independently cooperate with the deflection of the core material 4 to form a complicated shape. The structure shall allow large bending or bulging.
This pressure fluid is preferably supplied via struts 8 or 9.

In the ship bottom device of the present invention, a lift is generated on the flexible weight plate by the water flow. The magnitude of this torque F4 × L4 depends on the shape of the flexible weight plate 3 and the ship speed regardless of the degree of inclination of the hull. It is a decided value. Therefore, in the device of the present invention, when the inclination of the hull is small, the lift F4 can be increased to further reduce this inclination.

(Effects of the Invention) The ship bottom device of the present invention has an extremely simple structure and can stabilize its attitude not only on a yacht but also on other ships. In particular, a yacht inevitably has a slope while traveling, but by using the device of the present invention, it is possible to travel without this slope. It is also possible to increase the lift or forward force of the sail by reducing the inclination of the yacht.

[Brief description of drawings]

FIG. 1 is an explanatory view of a mounting position of the device of the present invention and a point of action of force, FIG. 2 is an explanatory view of a mounting position of the device of the present invention, and FIGS. 3 to 6 are horizontal cross-sections of a bottom device for a yacht of the present invention. In each figure, A is the case where the flexible weight plate is not deflected, that is, the case where the hull is horizontal and the flexible weight plate is not operated, and B to D are the cases where the flexible weight plate is not bent or This is the case when bulging. 1: Ship bottom. 2,2-1,2-2: Strut. 3: Flexible weight plate. 4,4 ′, 4 ″:
Core material.5,5 ': Skin material.6,7: Post rotation direction.8,8', 8 ″, 9,
9 ': Struts 10: Center line of bottom equipment. 11: Water flow direction. 12: Arms. 13: Struts on which cams are mounted. 14: Cams F, F4: Lifting force of flexible weight plate. F1: Sail Lateral lift F2: Buoyancy F3: Gravity of the weight plate L
1 to L4: Torque arm. G: Center of gravity of ship. H: Center of wind action. M, N:
Displacement of the column from the center line of the bottom equipment.

Claims (1)

(57) [Claims] Claim: What is claimed is: 1. A flexible weight plate including a core material and a skin material is supported by a plurality of struts extending from the bottom of the ship, and the flexible weight plate core is connected to the struts by axial rotation of the front and rear end struts. A ship bottom device having a structure in which the surface of a flexible weight plate is curved by applying a rotational force.