JPS5920516B2 - light buoy - Google Patents

Description

[Detailed description of the invention] The present invention relates to improvements in light buoys.

Light buoys are often used as navigational aids and to indicate dangerous areas.
When being tossed around by waves, if the rocking or tilting is too severe, the optical axis of the light may move out of the view of the navigator and become invisible.

In addition, if the rocking is severe, the light buoy will be subject to severe wear and tear.

The present invention suppresses the vertical movement of the light buoy by attaching a tail tube to the lower surface of a short cylindrical buoyant body with a double structure and a truncated inverted conical skirt surrounding the tail tube to allow water to pass through. However, it has a strong restoring force against inclination, can withstand strong waves, and can maintain sufficient buoyancy even if a ship contacts or collides with it and damages the outer wall of the buoyant body. It provides a robust and stable light buoy.

The contents will be explained in detail below based on the embodiments shown in the accompanying drawings.

The drawings are a cutaway front view of essential parts and a bottom view of a skirt portion of a light buoy according to the present invention.

In FIG. 1, reference numeral 1 denotes a short cylindrical buoyant body, which has a double wall structure including an outer wall 1' and an inner wall 1''.

The upper end of a cylindrical transition piece 2 is integrally attached to the center of the lower surface of the buoyant body 1 by a method such as welding.

A bottom plate 4 having a mooring elbow plate 3 fixed to the lower surface thereof is attached to the lower end surface of the transition piece 2.

5 is a truncated inverted conical skirt, and the opening edge on the small diameter side is the tail tube 2.
Its diameter is determined so that it faces the outer circumferential side wall of the buoyancy body 1 with an appropriate gap therebetween, and it is fixed integrally to the lower surface of the buoyancy body 1 at the edge of the larger diameter side by a method such as welding.

In the upper part of the skirt 5 near the lower surface of the buoyant body 1, several water holes 6 are bored at positions equally spaced around the circumference.

Furthermore, partition plates 7 are provided radially between the inner surface of the skirt 5 and the transition piece 2.

(See FIG. 2) On the upper surface of the buoyant body 1, a turret 8 having a lamp 9 attached to its top is erected.

The present invention has the above configuration.

When the light buoy begins to oscillate up and down under the influence of waves and the buoyant body moves in the direction of sinking into the water, water enters into the skirt 5 in a jet form from the gap at the opening on the small diameter lower end side of the skirt 5.

The water passage hole 6 is smaller than the gap at the small diameter lower end side opening of the skirt 5.
are small in diameter and few in number, so the water that has entered the skirt 5 cannot quickly flow back outside the skirt, and the inside of the skirt is pressurized by the water that has entered, gradually increasing the pressure from below against the bottom of the buoyant body. Therefore, a force acts against the sinking of the buoyant body 1 and tries to push it up.

In addition, the infiltrating water simultaneously jetting out from the water passage holes 6 exerts a force that tends to push the water up.

That is, the water in the skirt 5 acts as a damper and suppresses the sinking movement of the buoyant body 1.

When the buoyant body 1 begins to move in the floating direction, the water in the skirt 5 flows from the water hole 6 toward the small-diameter lower end opening and tries to circulate outside the skirt 5, but the water hole 6 is small. Because of the small number, rapid circulation is not possible, and the inertia of the water in the skirt 5 acts to prevent the buoyant body 1 from rising rapidly.

In this way, even if the buoyant body 1 moves up and down under the influence of waves, the movement is suppressed and becomes extremely slow.

In addition, if the light buoy is tilted as shown by the chain line due to waves, etc., the water flow moves in the direction of the arrow, and the water flow flows through the gap in the opening at the bottom of the skirt, exerting force in the direction of raising the light buoy, allowing it to quickly return from the inclination. becomes.

In addition, since the buoyant body 1 has a double wall structure, it has sufficient strength against turbulent waves, and even if a ship contacts or collides with it, it will not suffer fatal damage, and has a simple structure and long life. It can provide a stable light buoy.

[Brief explanation of drawings]

Fig. 1 is a cutaway front view of the main part of the light buoy according to the present invention, Fig.
The figure is the Ei congratulatory map of Figure 1. 1... Buoyant body, 1'... Outer wall, 1'ξ
...Inner wall, 2...Temperature tube, 5...
Inverted truncated conical skirt, 6...Water hole, 7...
...Partition board.

Claims (1)

[Claims] 1 A short cylindrical buoyant body with a double wall structure, an upper end of a transition piece fixed to the lower surface of the outer plate of the buoyant body, and a tail piece lower plate at the lower end of the tail piece, and a tail piece lower plate on the lower surface of the tail piece lower plate. The upper end of the skirt is fixed to the lower surface of the outer plate of the buoyant body, and the upper end of the skirt has a plurality of water passage holes drilled near the upper edge of the skirt. A light buoy characterized by having a truncated inverted conical skirt that is spaced apart from the sides to allow water to flow freely.