JPS6022590A - Hard sail reducible by vertical sliding - Google Patents

Abstract

PURPOSE:To reduce the area of a hard sail by half and lower its center of gravity in the reduction, by composing the hard sail of an upper and a lower portions and making the upper portion vertically slidable relative to the lower portion. CONSTITUTION:A lower hard sail portion 2 is attached with supports 7 to a mast 1. A frame 8 is attached to the top of the mast 1. Guide plates 10 are provided between the frame 8 and the lower hard sail portion 2. An upper hard sail portion 3 is provided on guide shoes 11, which are moved on the guide plates 10. Wires 4, 5 are coupled to the right and left ends of the upper hard sail portion 3, extend on pulleys 12 on the frame 8, and join each other as a single wire 6. The wires 4, 5 are wound or unwound by a winch 9 on a turning unit 13 to slide the upper hard sail portion up or down.

Description

[Detailed description of the invention] By lowering the center of gravity of the sail and halving the sail surface when the sails are furled, the ship's stability is improved and the sail surface resistance under wind pressure is halved, making it weather resistant during rough weather. Concerning a certain hard sail.

Conventional rigid sail systems often fold the sails into two or three parts with the mast at the center when retracting the sails, and the area when retracted is smaller than the area when the sails are unfurled. is about 50% for two folds and 40% for three folds. However, in that case, since it is folded around the mast, the height direction remains the same as when the sail is unfurled. In order to improve stability, it is preferable to lower the center of gravity of the sail system, so by lowering the upper hard sail to overlap the lower hard sail and retracting the sail, the area will be reduced by 50% and the center of gravity of the sail will be lowered. Since it moves approximately 25% of the total height downward, stability is improved and safety is increased.

This invention will be explained in detail based on the drawings.

Figure 1 is the front view of the wire vertical sliding stiff sail. Figure 2 is the AA cross section of Figure 1. Figure 3 is a detailed view of the guide plate and guide shoe. Figure 4 is the pantograph type vertical sliding sail. Figure 5 is a front view of the type hard sail, showing the BB cross section in Figure 40. The wire up and down type up and down slide folding type hard sail will be explained with reference to FIGS. 1, 2 and 3.

There is a lower rigid sail 2 attached to the mast 1 by a strut 7, and a frame 8 is attached to the upper end of the mast 1. A pulley 12 is attached to the frame 8. A guide plate 10 is provided between the lower hard sail 2 and the frame 8.

A guide shoe 11 that moves on this guide plate 10 is provided.
There is an upper hard sail 8, and the lower hard sail 1 and the upper hard sail 2 slide vertically in parallel along a guide plate 10 using a guide shoe 11.

The upper rigid sail 2 uses wires 4 and 5 attached to its right and left upper ends, which are combined into one wire 6 via a pulley 12 provided on a frame 8, and connected to a winch provided on a swing device 13. 9 to wind up and lower down.

The upper part of the hard sail device is rotated by a turning device 18 so as to adopt a sail angle suitable for the wind direction.

Next, a vertical slide system using a pantograph lifter will be explained using FIGS. 4, 5, and 3. The lower hard sail The hard sail 8 slides up and down on the guide plate 10 by a guide shoe 11. A pantograph link 28.2 is connected between the fulcrum 15 pinned to the lower hard sail 2 and the fulcrum 16 pinned to the upper hard sail 3.
4 are combined to form a pantograph for vertical lift. A parallel movement fulcrum 19 on the opposite side of the fulcrum 15 of this pantograph is horizontally moved from the mast 1 to the cylinder support 18 by the cylinder 17 supported.

The fulcrum 21 is also a cylinder attached to the upper hard sail 8, and the 22 which is horizontally moved by 20 is a pin position. Now, when the lowermost pin joint 26 in the center is moved up and down by the hydraulic cylinder 14, since pin joints 15 and 16 are each fixed to the hard sail, the parallel movement fulcrum 19 on the opposite side.
21, the hydraulic cylinder 14 rotates little by little around the bin joint 26 and pulls down the bin joint 25, thereby pulling the upper stiff sail 8 outward from the lower stiff sail 2 and retracting the sail.

° In this way, when deploying and retracting an approximate laminar flow type hard sail, the opposite side of the lower hard sail fixed to the mast is extended from the lower hard sail, and the top part of the lower hard sail is The guide board is supported by a frame extending from the mast, and the guide shoe attached to the upper hard sail slides, and the upper hard sail slides up and down, and when the sail is unfurled, it is pulled up and fixed.
When the sail is retracted, the lower hard sail is pulled down and the upper hard sail is brought together at the foot of the sail, so the area of the sail is halved and the center of gravity is lowered when the sail is retracted. This makes it possible to improve the stability of the ship.

[Brief explanation of the drawing]

Fig. 1 Wire up and down type vertical sliding type hard sail front view Fig. 2 Cross-section AA in Fig. 1 viewed from the arrow Fig. 8 Detailed view of C of the guide plate and guide shoe Fig. 4 Pantograph type vertical sliding type stiff sail Sail front view Figure 5 BB cross section in Figure 4 arrow 1, mast 2, lower hard sail 8, upper hard sail 4.5.6, wire 7, strut 8, frame 9, winch 10,
Guide plate 11, guide shoe 12, pulley 18, swivel ring 14, hydraulic cylinder 15, lower fixed bin joint 16, upper fixed bin joint 17.20, cylinder 18, to cylinder support 19.21, parallel movement fulcrum 22, bin joint 23. 24. Center line of pantograph link 25. Bin joint 26. Bin joint

Claims (1)

[Claims] When expanding and retracting an approximate laminar flow type hard sail, the side opposite to the mast of the lower hard sail fixed to the mast is extended from the lower hard sail, and the top part is supported by a frame that extends from the mast. The guide shoe attached to the upper hard sail slides on the guide plate attached to the upper hard sail, and the upper hard sail slides up and down.When unfurling the sail, it is pulled up and fixed, and when the sail is retracted, the lower hard sail is used. A hard sail that is retracted by overlapping the sail and the lowered upper hard sail.