JPH08192793A - Rig structure of yacht - Google Patents

Abstract

PURPOSE: To enable sailing without largely inclining the hull by installing a weight in a lower end part of an almost vertical support shaft to support a mast on which a sail and a boom are installed on the center of the hull, and supporting the support shaft around a longitudinal directional support arm of the hull by an upper deck so as to be capable of swinging. CONSTITUTION: A support shaft 7 and a mast 5 are put in a vertical posture, and a hydraulic cylinder is put in an unoperated condition, and the hull 10 is sailed, and when a sail 6 receives a wind, the sail 6 and the mast 5 incline, but since the hull hardly inclines, it can sail in a stable posture, and a crew can also keep an ordinary posture. If the hydraulic cylinder is actuated in a vertical condition, when the sail 6 receives a wind in a condition of being braked by sandwiching a guide rail 9, the hull 10 also inclines according to an inclination of the mast 5. On the other hand, braking by the hydraulic cylinder is not performed, the support shaft 7 swings around a support arm 70 by tilting of the mast 5, and inclines according to an inclination of the mast 5, and a height of the sail 6 lowers by H.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sailing structure for a yacht which is mainly applied to small yachts.

[0002]

2. Description of the Related Art Conventionally, in a small yacht, a base of a mast is fixedly installed on a hull, a boom is attached to the mast substantially perpendicularly to the mast, and a sail is stretched by the mast and the boom.

[0003]

In the above conventional structure,
When the sail receives wind, the wind pressure causes a tilting moment to act on the mast integrally connected to the hull, which causes the hull to tilt leeward together with the mast. When the wind speed exceeds a certain level, the hull will sail in an unstable posture in an inclined state corresponding to that, or under the adjustment of the weight movement of the occupants. When the adjustment becomes difficult and the inclination angle becomes large, there is a problem that the occupant cannot maintain a normal posture on the ship.

The present invention has been made in order to solve the above-mentioned conventional drawbacks, and has a simple structure and is stable without inclining the attitude of the hull greatly when the sail receives wind. An object of the present invention is to provide a sailing device for a yacht capable of sailing in a posture.

[0005]

According to a first aspect of the present invention, a mast to which a sail and a boom are attached, a substantially vertical support shaft for supporting the mast on the center line of a hull, and a lower end portion of the support shaft are attached. The support shaft is swingably supported by the upper deck around the support arm in the front-rear direction of the hull.

According to a second aspect of the present invention, in the above structure, the guide rail provided along the movement locus of the lower end of the support shaft in the hull and the lower end of the support shaft moves along the guide rail. And engaging means for engaging with the guide rail.

According to a third aspect of the present invention, in the above structure, the hull includes stop means for stopping the mast in an arbitrary inclined posture.

According to a fourth aspect of the invention, the stopping means is constituted by a picking means for holding the guide rail.

[0009]

In the structure of claim 1, since the support shaft for supporting the mast and the boom is swingable around the support arm in the front-rear direction of the hull, the mast is inclined to the leeward side even if the sail receives wind. By simply doing so, the hull hardly tilts, so it is possible to sail in a stable posture, and the occupant can also maintain a normal posture on board.

According to the second aspect of the invention, the guide shaft provided at the lower end of the support can smoothly swing the support shaft.

According to the third aspect of the invention, the restoring moment can be increased by the stopping means, and the inclination of the hull can be reduced accordingly. Further, by fixing the inclined position of the mast, it is possible to prevent the forward force from being reduced due to the mast falling due to a change in wind. .

According to the fourth aspect of the invention, the stop means can be easily constructed by using the rail.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, a hull 10 of a yacht has a rudder 20 installed on the stern center line of the hull, and a ballast keel 2 on the bottom of the ship near the center of the hull. A boom 4 is arranged near the center of the hull on the center line of the hull. The boom 4 is supported by a support shaft 7 extending downward, and the support shaft 7 is held by an upper deck 15. The boom 4 is formed so as to extend rearward from the support shaft 7 and project forward as well, and is attached to the hull so as to be rotatable about the support shaft 7 in a horizontal plane as will be described later. The front end of the boom 4 is bent at a substantially right angle and extends upward, and the mast 5 is formed by the upward extension. Such an L-shaped member is integrally formed of plastic. A mainsail 6 is stretched by the boom 4 and the mast 5.

As described above, when the boom 4 is extended to the front from the rotation center and the mast 5 is provided at the front end portion thereof, the lift center 60 of the sail 6 approaches the rotation center of the boom 4, so that the boom 4 is rotated. The force to operate is small. The structure of the mast and the boom is not limited to such a structure, and a mast is formed on an extension line of the support shaft 7 and a boom is provided generally orthogonal to the mast, which is generally adopted in the past. The structure may be different.

As shown in FIGS. 2 to 4, the support shaft 7 is provided with support arms 70 projecting to both sides at an intermediate part thereof, and the support shaft 70 and the support arm 70 are attached to a mounting portion of the support arm 70. A boss 71 covering the intersecting portion is attached, and the middle portion of the support arm 70 is supported and reinforced by the boss 71. A cylindrical portion 41 is provided inside the boom 4 to form a through hole that penetrates vertically, and a portion that protrudes upward from the boss 71 of the support shaft 7 is inserted into the cylindrical portion 41. . A lid 77 is attached to the upper end of the support shaft 7 to prevent it from coming off, and radial bearings 76 and 74 are provided in the upper and lower portions of the tubular portion 41, and the lower end surface of the tubular portion 41 and the boss 71 are provided. A thrust bearing 75 is arranged between the upper end surface and the upper end surface. Further, a pair of bearing members 16 facing each other are attached to the upper deck 15, and both ends of a support arm 70 extending in the front-rear direction of the hull are rotatably fitted into the bearing member 16 via bearings 72. In addition, a thrust bearing 73 is interposed between the boss 71 and the bearing member 16, whereby the support shaft 7 is configured to be swingable in the ship width direction together with the mast 5, and the support arm 70 supports the support shaft 7 and the mast 5. 5 and sail 6 are supported.

A counterweight 8 is attached to the lower end of the support shaft 7, and the counterweight 8 is supported by the weight of members (boom 4, mast 5 and sail 6) above the support arm 70 in FIG. The weight of the counterweight 8 is set so that the moment in the opposite direction is greater than the moment in the surroundings. That is, the counterweight 8 is provided so that when the mast 5 tilts, a moment that restores the tilt acts.

A guide rail 9 is provided in the hull 10 along the inner surface of the ship bottom 11, and the guide rail 9 is provided along the movement locus of the lower end of the support shaft 7. On the other hand, below the counterweight 8 is shown in FIGS.
As shown in, a reverse U-like grip of the guide rail 9
A character-shaped attachment member 81 is attached, and the attachment member 8
1 is a hydraulic cylinder (stopping means) 91 at the center in the ship width direction.
Are provided facing each other, and a pair of guide rollers (engaging means) 92 are provided facing each other on both sides thereof. The piston rods of the pair of hydraulic cylinders 91 are protruded to guide the guide rails 9 at their tip portions.
By pressing and pinching both side surfaces of the guide rail 92, the guide roller 92 rolls on both side surfaces of the guide rail 9 so that the lower end portion of the support shaft 7 smoothly moves along the guide rail 9. I am trying to move. That is, by the hydraulic cylinder 91, the inclined posture of the support shaft 7,
Therefore, the stop means for stopping the inclined posture of the mast 5 at an arbitrary position is constituted, and the guide roller 92 constitutes an engagement means for the guide rail 9. Further, stoppers (not shown) are provided at both ends of the guide rail 9 to prevent the support shaft 7 from tilting beyond a certain tilt angle. The hydraulic piping for the hydraulic cylinder 91 is not shown.

In the above structure, the support shaft 7 and the mast 5 are in a neutral state (vertical posture), the hydraulic cylinder 91 is inoperative, the hull 10 is driven, and the sail 6 is in that state.
When the wind receives the wind, the sail 6 and the mast 5 are inclined due to the wind pressure, for example, as shown by arrows and broken lines in FIG. And because the hull hardly tilts,
It is possible to sail in a stable position, and the occupants can also maintain a normal position on board. However, in the vertical state shown by the solid line in FIG. 2, braking (fixing) is performed by operating the hydraulic cylinder 91 and pinching the guide rail 9.
When the sail 6 receives wind in this state, the hull 10 also inclines in accordance with the inclination of the mast 5 as shown by a virtual line.

On the other hand, if braking is not performed by the hydraulic cylinders 91, the support shaft 70 integral with the mast 5 is tilted so that the guide roller 92 rolls along the guide rail 9 at the lower end of the support shaft 70. It swings around and inclines corresponding to the inclination of the mast 5, and the hull 10 does not rotate accordingly and maintains a substantially horizontal state. As a result, the height of the sail 6 is lowered by H as shown in FIG. 2, and the projected area for the wind is reduced accordingly, and even if the wind pressure is further increased, the stability against it is kept good. You will be drunk.

Further, when the hydraulic cylinder 91 is operated with the mast 5 tilted to fix the lower end of the support shaft 7 to the guide rail 9, the counterweight 8 is shifted from the center line of the hull to its stop position. Then, the center of gravity of the hull 10 correspondingly moves to the windward side, which increases the restoring force with respect to the movement of the hull 10 inclining to the leeward side. further,
By fixing the inclined position of the mast, it is possible to prevent the forward force from being reduced due to the mast falling due to changes in the wind.

In the neutral state, the mast 5 with a very weak wind
Since it is not preferable to tilt, the counterweight is set to an appropriate weight to set the restoring moment for the tilt of the mast 5 to an appropriate magnitude, or the hydraulic cylinder 91 is used.
And the support shaft 7 moves the support arm 7 below a predetermined wind speed.
It is preferable to adjust so as not to rotate around 0.

[0022]

As described above, in the structure of the above-mentioned claim 1, since the support shaft for supporting the mast and the boom can swing around the support arm in the longitudinal direction of the hull, the sail receives wind. However, since the mast only leans to the leeward side and the hull hardly leans, it is possible to sail in a stable posture, and the occupant can also maintain a normal posture on board.

According to the second aspect of the present invention, the guide shaft provided at the lower end of the support can smoothly swing the support shaft.

According to the third aspect of the invention, the restoring moment can be increased by the stopping means, and the inclination of the hull can be reduced accordingly. Further, by fixing the inclined position of the mast, it is possible to prevent the forward force from being reduced due to the mast falling due to a change in wind.

According to the structure of claim 4, the stop means can be easily constructed by utilizing the rail.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line DD of FIG.

FIG. 3 is an exploded perspective view of a mast and its support structure.

FIG. 4 is an enlarged sectional view of a support shaft structure.

FIG. 5 is a front view of a lower portion of a support shaft.

FIG. 6 is a sectional view taken along line AA of FIG. 5;

7 is a sectional view taken along line BB of FIG.

8 is a cross-sectional view taken along the line CC of FIG.

[Explanation of symbols]

 4 boom 5 mast 6 sail 7 support shaft 8 counterweight 9 guide rail 10 hull 11 bottom plate 15 upper deck 70 support arm 81 mounting member 91 hydraulic cylinder (stopping means) 92 guide roller (engaging means)

Claims (4)

[Claims] 1. A mast to which a sail and a boom are attached, a substantially vertical support shaft for supporting the mast on the center line of a hull, and a weight attached to a lower end portion of the support shaft. Is a sailing structure for a yacht, which is swingably supported by an upper deck around support arms in the front-rear direction of the hull. 2. A guide rail provided along the movement locus of the lower end of the support shaft in the hull, and the lower end of the support shaft engages with the guide rail so as to move along the guide rail. The sailing structure for a yacht according to claim 1, further comprising: engagement means. 3. The sailing structure for a yacht according to claim 1 or 2, further comprising: a stop means for stopping the mast in an arbitrary inclined posture inside the hull. 4. The sailing structure for a yacht according to claim 3, wherein the stopping means comprises a gripping means for gripping the guide rail.