JPS6231676B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for removing a launching slide interposed between a ship's platform and a ship's hull in order to enable the ship's body to slide on the ship's platform when the ship is launched.

Conventionally, after launching, a ship's hull was moored to a buoy on the sea, and a launching slide fixed to the ship's hull was removed using a marine crane at sea.

As for the launch slide that sinks into the sea, as shown in FIG. Next, remove the slip hooks 4 of the steel cables 3 that connect the sliding platform 2 to the hull 7, release the lashing between the hull 7 and the sliding platform 2, and then remove the sliphooks 4 of the steel cables 3 that tie the sliding platform 2 to the hull 7. Let it sink into the sea.

Next, the sunken slide 2 was lifted up by the marine crane 1 and recovered onto a barge.

On the other hand, for a launching slide that floats on the sea, as shown in Figure 2, a weight 6 is sunk into the seabed 8 in advance, and then a diver attaches one end of the steel cable 9 of the marine crane to the weight 6. It is connected to the sliding platform 5 which is secured to the bottom of the hull 7 above through the hanging ring 6a, and then the slip hook 4 is removed to release the binding between the hull 7 and the sliding platform 5, and then the marine crane 1 is hoisted up and the slide 5 is lowered to the state shown by 5A to prevent damage to the outer panel of the hull 7 and its coating, and then the hull 7 is moved laterally to the state shown by 7A. Next, the hoisting of the marine crane 1 is released, the tension on the steel cable 9 is relaxed, and the slide platform 5A is floated to the state shown in 5B, and then the connection between the slide platform 5B and the steel cable 9 is removed, and The slide 5B was lifted by the auxiliary lifting hook 1a of the crane 1 and recovered onto the barge.

However, according to these conventional construction methods, since the slide was removed at sea, the removal work was unstable due to the oscillation of the ship and the marine crane, which resulted in problems such as increased man-hours and instability. In addition, when the sliding platform 2 that sinks using the conventional construction method is removed from the hull 7, it is necessary to simultaneously and instantly remove the multiple sliphooks 4 provided in the rudder direction of the hull 7. Removing the plurality of slip hooks 4 and steel cables 3 was difficult and dangerous.

In view of the above-mentioned problems, the present invention proposes a construction method that can safely and quickly remove a launch slide.

Hereinafter, the construction method of the present invention will be explained based on Fig. 3 A, B, and C.

First, as shown in Figure 3 A, the hull 1 after launching
is docked in the dock 2 with the launch slide 3 tied down, and then the seawater in the dock 2 is drained until the dock bottom 2a and the lower surface of the slide 3 come close to each other as shown in B. Next, the diver dives into the sea and slides onto the slide 3.
The sliding platform 3 is secured to the dock bottom 2a with a fixed wire 4 so that it does not float up. After that, move the slide 3 to the hull 1.
The slip hook 6 of the steel cable 5 that is tied to the ship is removed to release the binding between the hull 1 and the sliding platform 3.

Next, as shown in C, after injecting water into the dock 2 to float the hull 1 and separate the hull 1 from the sliding platform 3, if the hull 1 is docked from the dock 2, the sliding platform can be removed. The work is finished. Thereafter, after draining water from the dock 2, cleaning up the removal slide 3 can be carried out safely and efficiently using a land crane.

Moreover, the construction method of the present invention has a particularly large economic effect in the case of small ships. Furthermore, either a dry dock or a floating dock may be used to implement the construction method of the present invention.

As described above, in the method of removing a ship's launch slide using the method of the present invention, the launching ship is docked in a dock with the launch slide tied down, and then the underside of the launch slide is removed. The water in the dock is drained until it comes close to the dock bottom, then the sliding platform that rises above the water connects it to the dock bottom, then the lashing between the sliding platform and the launching hull is released, and then After injecting water into the dock to float the launched hull and separate the hull from the slipway, the hull is launched from the dock.
The removal work will be carried out under stable conditions inside the dock, unaffected by the weather.
It is safer and more efficient than conventional construction methods. In addition, since the water injection and drainage function of the dock is effectively used,
Unlike conventional construction methods, there is no need to use offshore cranes, resulting in lower work costs.

In addition, since the construction method of the present invention connects the floating slide to the dock bottom, the lashing and release of the slide and the launching hull can be done using multiple slip-hooks and the like, unlike when removing a conventional sinking slide. There is no need to remove the steel cables at the same time and in an instant, and this can be done more safely and reliably than conventional methods.

[Brief explanation of the drawing]

FIGS. 1 and 2 are schematic explanatory views showing conventional removal work. FIGS. 3A, 3B, and 3C are schematic explanatory diagrams chronologically showing the removal work according to the construction method of the present invention. Hull...1, Dock...2, Launching slipway...
3.

Claims (1)

[Claims] 1. The launching vessel is docked in the dock with the launch slide tied down, and then the water in the dock is drained until the bottom of the launch slide is close to the bottom of the dock, and then the boat is brought to the surface. Next, the sliding platform and the launching hull are connected to the bottom of the dock, the lashing between the sliding platform and the launching hull is released, and the launching hull is floated by injection into the dock, and the hull and 1. A method for removing a boat launch slide, which comprises separating the boat from the slide and then letting the boat leave the dock.