JPS61275088A - Small size boat - Google Patents

Abstract

PURPOSE:To make it possible to adjust the lift of a small type sliding boat which is provided with a water jet propeller having a vertically swingable hand pole in the forward section of the boat, by attaching an airfoil to the hand pole section and by making the attach angle of the airfoil variable in accordance with the vertical movement of the hand pole section. CONSTITUTION:An airfoil 8 is attached to a support column 3 attached to swingably in the vertical direction in the forward section of a boat, through the intermediary of a support column. The boat is provided thereto with a water jet propeller. The boat slides on the sea at a high speed by being controlled by an operator standing on the deck of the boat who manipulates the hand pole 3. The attach angle of the airfoil 8 may be changed in accordance with the vertical movement of the hand pole 3 to adjust the lift of the airfoil, thereby it is possible to enhance the enjoying of the boat using for sport.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a small watercraft equipped with a water jet propulsion device.

2. Description of the Related Art Conventionally, there have been small sports boats that are powered by an engine and that glide on the water surface, and are equipped with a handle ball that can be raised and raised freely on the hull.

OBJECT OF THE INVENTION The present invention has been made with the aim of increasing the sporting enjoyment of such small boats.

Structure of the Invention The small watercraft according to the present invention is characterized in that a wing is rotatably supported above the hull (including the engine hood), and the rotation of the wing is linked to the vertical movement of the handle ball. That is.

Wings supported above the hull generate lift when planing,
Float the hull.

Further, since the wings are rotated in conjunction with the vertical movement of the handle ball, it is possible to change the angle of attack, and the lift force can be actively adjusted.

Embodiment Hereinafter, one embodiment of a small watercraft according to the present invention will be described based on the drawings.

Fig. 1 is a side view showing an embodiment of a small boat according to the present invention, Fig. 2 is a plan view showing the same embodiment, Fig. 3 is a plan view showing a wing of the same embodiment, and Fig. Z is a plan view showing the wing of the same embodiment. FIG. 5 is a plan view showing the example handle ball, and FIG. 5 is an enlarged cross-sectional view taken along line v--v in FIG. 3.

In FIGS. 1 and 2, 1 is a hull (including engine hood 1a) molded from synthetic resin or the like;
A handle pole 6 is attached to the bracket 2 at the front end of the hull 1.
The base end portion of the vessel is supported so as to be able to freely rise and fall via a support shaft (not shown) extending in the width direction of the hull (the drawing shows the vessel in a standing position). A part handle 5 is attached to the rear end of the handle ball 6 and is rotatable around a substantially vertical support shaft (not shown).

In addition, the engine hood 1a and the handle pole 3
is composed of a buoyant structure (a float-like structure to increase buoyancy).

Supports 6 are provided on the left and right sides of the front end of the hull 1.

The upper end of the strut 6 is engaged with a groove 8a provided on the lower surface of the wing 8, while the front side of the wing 8 is rotated to the upper end of the strut 6 via a support shaft 7 disposed in the groove 8a. Supported for free movement. The wings 8 are largely extended from the sides of the hull 1, and are set at an angle of attack of about 1 to 5 degrees with respect to the horizontal when the handle pole 6 is fully raised (standing position). Further, as shown in FIGS. 2 and 3, a recess 9 is formed on the rear side of the wing 8, and the intermediate portion of the handle pole 3 is disposed in the recess 9. As shown in FIGS. 3 and 5, grooves 10 are provided in the front-rear direction at the left and right sides of the recess 9 of the blade 8, respectively. Further, as shown in FIG. 7, projections 11 are respectively provided on the left and right side surfaces of the intermediate portion of the handle pole 3, and the projections 11 are movably fitted into the grooves 10.

That is, the hull 1 including the strut 6, the handle pole 3,
The blade 8 provided with the groove 10 and the protrusion 11 form a kind of slider crank mechanism, and the blade 8 is rotated in conjunction with the vertical movement of the handle pole 3.

Since this embodiment is configured as described above, a lifting force is generated during planing, and the hull 1 floats.

Furthermore, since the blade 8 is rotated in conjunction with the vertical movement of the handle pole 3, the angle of attack also changes. Therefore, by actively adjusting the lift according to boat speed and other conditions, you can enjoy the thrill of floating in the air when making sharp turns or running at high speed.

Note that the blade in the present invention may have an airfoil cross-sectional shape, and its length, shape, and structure are not limited to those of the above embodiments. For example, as another embodiment, the wing may be divided into two parts, left and right.

Furthermore, when the handle pole is raised to its maximum position (standing position), the wing may be horizontal, or the angle of attack may be greater than the angle of attack, but considering the balance between lift and drag, As in the example, the angle of attack is /
It is preferable to use ``jo'' or ``jo''.

Effects of the Invention According to the present invention, lift is generated during planing and the hull floats, and the angle of attack of the wings is variable in conjunction with the vertical movement of the handle pole, so that the lift can be actively adjusted. The excellent effect of increasing the sporting enjoyment of small boats can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an embodiment of a small boat according to the present invention, Fig. 2 is a plan view showing the same embodiment, Fig. 3 is a plan view showing a wing of the same embodiment, and Fig. 7 is a plan view showing the same embodiment. FIG. 5 is a plan view showing an example handle pole, and FIG. 5 is an enlarged cross-sectional view taken along line v--v in FIG. 3. 1...hull, 3...handle pole,
8... Wing bearing 2 figure 3 figure 5 figure

Claims (1)

[Claims] (1) A small watercraft characterized in that a wing is rotatably supported above the hull, and the rotation of the wing is linked to the vertical movement of a handle ball.