JPS62292586A - Method of submerging mooring device for floating light - Google Patents

Abstract

PURPOSE:To prevent a mooring cable from being shortened and being abnormally worn, by attaching an underwater resistor such as an underwater parachute or the like to the upper section of a lower mooring cable so that a submerging weight is lowered and bottomed prior to the bottoming of a chain type mooring cable during dropping and lowering the submerging weight. CONSTITUTION:The upper end of a mooring cable is engaged to a mooring ring provided to a rail cylinder of a floating light 1. The mooring cable is composed of a chain type upper mooring cable 2, a nylon rope 2' below the latter, a pyrane rope 2'' below the latter, and a chain type lower section cable 2''' below the latter, in that order from above, and is connected at its lower end with a submerging weight 3. The above-mentioned cables are connected with each other by means of shackles. An underwater resistor 4 such as an underwater parachute or the like and the chain type lower section mooring cable 2''' are connected with each other by means of the upper section cable 4' of the lower mooring cable 2'''. Further, a resistor such as an underwater resisting plate may be used as the underwater resistor 4.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention (a) Field of Industrial Application The present invention relates to an improvement in the method of sinking a mooring device consisting of a mooring line with a sinker connected to the lower end for mooring a light buoy or the like. .

(b) Conventional technology Devices for mooring light buoys, observation buoys, floating fish reefs, or marine structures, etc. at sea in relatively large water depths involve sinking a sinker into the seabed and attaching this and light buoys, etc., to a length longer than the depth of the water. , approximately 1.
It is connected and moored with a mooring rope that is five times as long. Therefore, the lower part of the mooring cable lands on the seabed and rubs against the seabed due to waves, water currents, etc. For this reason, abrasion-resistant chains are used at least in the lower part of the mooring cables, which are likely to rub against the seabed. Other parts of the mooring line are sometimes made of chains for strength reasons, but due to the great depth of the water, they may also be made of wire rope or fiber lobes. When such a mooring device is sunk to moor a light buoy, etc., the light buoy, etc., mooring line, and sinker are connected on a work boat or barge, and the light buoy, etc. is floated on the sea.
The mooring line will be extended into the sea one by one, and finally the sinker will be dropped into the water and the mooring will be completed.

(c) Problems to be solved by the invention However, when the sinker is dropped into the water and descends to the bottom, the water resistance of the concrete block sinker
Because the water resistance is greater than the water resistance of the mooring line chain connected above it, the mooring line chain often descends and lands before the sinker, and the sinker ends up on top of it. there were.

If the chain is laid down by a sinker in this way, the length of the mooring line will be shortened, and there is a risk that the light buoy etc. will be drawn into the water by waves. In addition, in this case, the mooring force exerted on the light buoy etc. makes it difficult for the chain placed under the sinker to escape from under the sinker, causing the chain to rub against the corners of the sinker, causing abnormal wear.

(d) Means for solving the problem of inadequacy The present invention is characterized by attaching an underwater resistance body such as an underwater parachute to the upper part of the lower mooring rope (chain part), and lowering the lower mooring rope of the chain mooring rope when the sinker is dropped and lowered. This is a method of sinking mooring devices such as light buoys that increases resistance so that the sinker descends and lands before the chain mooring line. The following is an overall view showing the internal sinking weight of the present invention being dropped and the sinking weight connected to the mooring line being lowered according to the drawings. In the figure, (1) is a marine structure moored with a mooring device, and in this example, a light buoy is shown.

(S) is one mooring rope, and the upper end is anchored to a mooring ring provided on the tail tube of the light buoy (1). Mooring rope of this example (2
) is the upper mooring rope of the chain (2), below it is the nylon robe (2'), and below it is the pyrene robe (2).
, consists of a lower mooring line (2) of chain below, and a sinker (3) is connected to its lower end. Each mooring line is connected by a shackle.

(4) is an underwater resistor such as an underwater parachute, which is connected to the upper part of the lower mooring line (2) of the chain by a line (4').

(E) Function With the above structure, when a sinker connected to a mooring line is dropped from a work boat in order to moor a light buoy, the resistance of the sinker to fall is reduced by the resistance of the underwater resistor connected to the mooring line. is smaller than the falling resistance of the lower mooring line of the chain including the underwater resistance element (underwater parachute) (4), and there is no fear that the sinker will land on the bottom of the water first and trap the chain.

(F) Example In the above example, the mooring rope (2) was constructed with chains at the upper and lower parts and a synthetic fiber lobe in the middle, but it is also possible to use a mooring rope whose entire length is made up of chains, or Of course, the present invention can also be applied to a structure in which only the lower mooring line is a chain, and the rest are wire ropes or fiber ropes. Further, although the underwater resistor is shown as an underwater parachute, it goes without saying that a resistor such as an underwater resistor plate (see FIG. 2) may also be used.

(G) Effects of the Invention By using the method for sinking a mooring device such as a light buoy of the present invention, there is no risk of the chain of the mooring line being caught under the sinker, and the mooring line is not shortened as in the conventional case. No abnormal wear will occur.

[Brief explanation of the drawing]

FIG. 1 is an overall view showing a state in which a mooring device such as a light buoy according to the present invention is being sunk, and FIG. 2 shows another embodiment of an underwater resistor. 1...Light buoy, E...Mooring line, 3...
・Sinking weight, ・1... Underwater resistor, Patent applicant Zenilite Buoy Co., Ltd./〆τ

Claims (1)

[Claims] In a mooring device such as a light buoy, which uses a mooring line whose lower end is connected to a sinker, the upper end is connected to a light buoy, etc., and at least the lower part is a chain, when the mooring device is sunk, the upper part of the lower part of the mooring line is A method for sinking a mooring device such as a light buoy, characterized by connecting underwater resistors so that the sinker hits the bottom first.