JPS5816988A - Canvas equipment of sail - Google Patents

Abstract

PURPOSE:To effectively prevent surging on canvas fit to a mast which is vertically secured to a boat by longitudinally placing a pair of flaps at both sides of the canvas body in such a manner as to be rotatable to their axes. CONSTITUTION:A pair of flaps 7 and 7' are longitudinally and rotatably placed at both sides of a canvas body 4a fit to a mast 3 which is vertically secured to a boat hull 2. The flaps 7 and 7' are attached at respective sides to operation rods 8 and 8' which are vertically raised at both sides of rims 6 and 6' and actuating sources 9 and 9' such as motors or torque hinges are mounted at the uppermost points of the operation rods 8 and 8', respectively. If wind comes in the direction A, the flap 7' on the windward side is closed and the other 7 on the leeward is opened. Since the wind is rectified by the rounded side of the flap 7', surging may be prevented.

Description

[Detailed description of the invention] The present invention relates to a sail device for a sailing ship.

In recent years, sailing ships that effectively utilize one force for navigation have been reconsidered from the perspective of energy conservation. Conventionally, this type of sail has been constructed of a rigid body sail whose transverse shape is wing-shaped.

However, the sail is prone to airflow surging at both ends. Therefore, in order to prevent the occurrence of surging, if both ends of the sail are rounded, there is a problem that effective lift cannot be obtained at the end of the sail on the downstream side.

This invention was made in order to solve the above problems, and includes a pile body attached to a mast vertically fixed to a ship's hull, and the ends of the pile body are pivoted in the height direction of both ends of the pile body. It is characterized by having a pair of rotatably attached flaps.

One embodiment of the sail device of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing a state in which the sail device of the present invention is attached to a ship's hull, and FIG. 2 is a sectional view taken along the line A--A in FIG. 1.

In FIGS. 1 and 2, 1 is a base fixed on the hull 2, 3 is a mast whose lower end is vertically inserted and fixed into the base 1 so as to be rotatable, and 4 is a sail attached to the mast 3. The sail 4 is
A plate material such as a metal plate or bluff knock 41 is reinforced with ribs between the curved two-beams 6 and 6' which are fixed parallel to each other on the upper and lower parts of the mast 3 via fixing members 5 and 5'. The pile body 1+1 and the pile body 4
In the height direction of both ends of a, the side ends I [ll'll+
It consists of a pair of flaps 7.7' which are rotatably mounted as horizontal cross-section airfoils. One end of the pair of flaps 7.7' (the end with 9j) fixed to an operating shaft 8.8' provided perpendicularly between the ends of the beam members 6 and 6', Operation UQh 8. C1 at the upper end of s',
A drive source such as a motor or torque hinge is attached. As a result, when the driving source 118 and 8 are operated, the pair of flaps 7.7'il1 and the operating levers 118 and 8
Rotate around '. In addition, the above operation 1lIll 8
．． e' is the inner side of the pile body 4a (as shown in FIG. 2).
It is attached to the mast 3 side). Therefore, the flap/
, 7' is.

It can be closed so as to contact the inner surfaces (side surfaces of the mast 3) at both ends of the pile main body 4a, and can be rotated so as to be able to open outward from both ends of the pile main body 4a.

The operating mode of the flap 7.7' will now be explained.

When the wind blows from direction A in Figure 2, the wind -3 = closes the upper (right side in the figure) flap γ, while closing the flap γ on the leeward side (
7 flags (411+11) on the left in the figure are opened (indicated by solid lines in the figure). As a result, at the desk end on the windward side, the wind is rectified by the rounded end of the flap 7' and surging is prevented from occurring, while at the desk end on the leeward side, the wind is rectified by the rounded end of the flap 7'.
, the flaps 7 act to increase the lift of the sail.

If the wind blows in direction B or F) in FIG. 2, the flag 7.7' is rotated in the direction shown by the dotted line in the figure. This brings about the same effect as in the above case.

In the case of a tailwind, both flaps 7 and 7' are opened to expand the sail area.

As explained above, according to the present invention, it is possible to effectively prevent surging occurring in the sail, thereby bringing about an extremely useful effect that the functions of the sail can be maximized.

[Brief explanation of the drawing]

Figure 1 shows this ship + vJ sail gear attached to the hull.
4~ Partially cutaway perspective view showing the state, 1 in Figure 2, A- in Figure 1
It is an A-line sectional view. 1 on the drawing? ■...base
2...Hull 3...Mast
4...Sail 4a...Pile body 5,5'...Fixed I゛X
1 (Material 6.6'...Liangzuki 7,7'...Flap 8.8'...Operation shaft ri, 9'...
Drive source applicant: Japan Steel Pipe Manufacturing Association 14 Agent: Keitabe Tsutsumi (and 1 other person) 5-

Claims (1)

[Claims] It has a pile body attached to a mast fixed perpendicularly to the hull, and a pair of flaps rotatably attached to both ends of the pile body in the height direction with the front V end set at +l111. It is fully featured on the sails of a sailing ship.