JPS60255595A - Method of installing marker buoy, and marker buoy device - Google Patents

Abstract

PURPOSE:To prevent a buoy from floating away due to a tidal current or the like, by coupling one end of a rope to an anchor, coupling the other end of the rope to the buoy through a winch-like winder, and winding the rope after the anchor has reached the bottom of water. CONSTITUTION:One end of a rope 2 coupled at the other end to an anchor 3 is coupled to a buoy 10 through a winch-like winder 6, which is driven by a motor 5. At an aimed spot, the buoy 10 is moved down to the surface of water, and the anchor 3 and the rope 2 are sunk toward the bottom 8 of the water. After it is confirmed that the anchor 3 has reached the bottom 8 of the water, an instruction signal is sent by a radio means or the like so as to wind the rope 2. The rope 2 is kept unslacked enough to prevent the buoy 10 from floating away due to a tidal current or the like. This results in indicating the aimed spot accurately.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a mark 7 used for locating a target on the water surface.
Regarding a buoy installation method and a mark buoy device.

[Prior art]

FIG. 1 is an explanatory diagram of a conventional mark buoy installation method. When working on water, there are various methods for determining the position on the water. The mark buoy device, which is connected by a rope 2 between the anchor 3 sunk below the bottom surface 8 and the mark buoy 1 floating on the water surface indicating the target position, is lowered to the water surface, and the anchor is anchored to the water bottom surface by its own weight. There is a method of setting the position of mark buoy 1 as the target position.

When installing this mark buoy, the length of the rope 2 is usually determined in consideration of errors in water depth measurement caused by the undulations of the water bottom within the spread range of ultrasonic waves, and lateral movement to sink the anchor below the water bottom. Therefore, the length of the mark buoy 1 is required to be 10 to 20 inches longer than the water depth, and because of this extra length, the mark buoy 1 is carried away by currents, winds, etc., and the position of the mark buoy l has a large error with respect to the target position. This error is, for example, at a depth of 2,000
If the mark buoy 1 was installed with an allowance of 15% extra length for the rope 2 at 0 m, there was a drawback that the maximum length would be 100 m Vi-.

[Purpose of the invention]

An object of the present invention is to provide a mark buoy installation method and a mark buoy device that allow highly accurate positioning on the sea surface.

[Structure of the invention]

In the mark buoy installation method according to the present invention, a mark buoy device having a mark buoy, a rope tied at one end to the mark buoy, and an anchor tied to the other end of the rope is lowered from a ship to a target water surface, and the squid is placed under its own weight. After confirming that the rope has settled down to the bottom of the water, the rope is wound up by a rope winding device installed on the mark buoy or anchor, and the mark buoy is brought close to the water surface directly above the squid. It is characterized by marking the position above the water surface.

〔Example〕

FIG. 2 is an explanatory diagram showing an embodiment of the mark buoy installation method according to the present invention. The mark buoy 1o is tied to the other end of a rope 2 that is sufficiently longer than the water depth to which the anchor 3 is tied, and has a winding device 6 that is driven by a motor 5 to wind the rope 2 and a command signal from the ship. A command receiving section 4 that receives commands and operates the motor 5 is installed. At the target point, the mark buoy 10 is lowered to the water surface, and after confirming that the anchor 3 has reached the water bottom 8 and is anchored, a command signal is sent from the command transmitter 7 installed on the ship, and this command signal is sent as a command signal. The signal is received by the receiver 4, activates the motor 5 of the rope winding device 6, winds the °C rope 2, and moves the mark buoy 1.
0 close to the water surface directly above the squid and pinned down, it is possible to indicate the exact target position. In this case, the winding force of the lobe winding device needs to be greater than the sum of the rope's gravity and the force of the rope being blown by currents and wind, and smaller than the buoyant force of the mark buoy. This is because if the winding force is greater than the buoyancy of the mark buoy, the mark buoy 10 will be submerged in the water due to the operation of the lobe winding device 6.

The mark buoy device described above is an example in which the rope winding device 6 is installed on the mark buoy 10, and the rope winding device 6 has a driving motor and receives an ultrasonic signal sent from a command transmitter on the ship. A command receiving section that operates the motor and drives the rope winding device may be attached to the anchor 3 and installed on the bottom surface of the water. In this case, the winding force of the lobe winding device must be greater than the force with which the rope is blown away by the tidal wind, and less than the difference between the buoyancy of the mark buoy and the weight of the rope. This is because if the winding force is greater than the difference between the buoyancy of the mark buoy and the weight of the wire, the mark buoy 1o will be submerged in the water due to the operation of the rope winding device 6. ,.

For example, in submarine cable installation work, where the seabed topography is complex, where the cable can be laid is limited to a narrow range, and accurate navigation of the cable-laying ship is required, it is necessary to Mark Buoy Netsu 7711
If o is set on the route, it is possible to target this mark buoy 10 when laying the submarine cable later, operate the ship accurately, and easily lay the cable on a more accurate route.

〔Effect of the invention〕

According to the present invention, as described above, the position on the water surface can be indicated with high accuracy.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram showing the conventional mark buoy installation method, Figure 2
The figure is an explanatory diagram showing an embodiment of the mark buoy installation method of the present invention. 1.10... Mark buoy, 2... Rope, 3... Squid, 4... Command receiving section, 5... Motor, 6...Rope winding device, 7...Command transmitter, 8...Bottom surface. 1. Trap/Ngusa / Diagram

Claims (3)

[Claims] (1) A mark buoy device having a mark buoy, a rope tied to one end of the mark buoy, and an anchor tied to the other end of the rope is lowered from the ship to the target water surface, and the anchor sinks and settles on the water bottom due to its own weight. After confirming that
A mark buoy installation method comprising winding up the rope with a rope winding device provided on the mark buoy or anchor, bringing the mark buoy close to the water surface directly above the anchor, and marking the position on the water surface. (2) A mark buoy characterized by having a mark buoy, a rope tied at one end to the mark buoy, an anchor tied to the other end of the rope, and a winding device attached to the mark buoy for winding the rope. Device. (3) A mark buoy characterized by comprising a mark buoy, a rope tied at one end to the mark buoy, an anchor tied to the other end of the rope, and a winding device attached to the anchor for winding the rope. Device.