JPH11263284A - Foothold device for vessel bottom work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quickly move a device by tightly fixing a coaming to a vessel bottom, forming an air reservoir in a space surrounded with the coaming, protruding the upper part of a foothold device having a floating tank in this and bringing a roller provided in the top part of a main body into contact with the vessel bottom. SOLUTION: First, a coaming is fixed to incorporate (a), (b) and (c) of a vessel bottom 1. Then, some air is sealed in the floating tanks 4 and 4 of a foothold device main body 3 to move by a winch on a vessel to the lower position of the coaming while operating the same, air is injected from a turboblower 7 into the floating tanks 4 and 4 to cause the foothold device main body 3 to float, its upper part being protruded into the coaming, and rollers 6 and 6 are brought into contact with the vessel bottom 1. Then, the air from the turboblower 7 is injected in the air enveloped by the to form an air reservoir P and, when the supplying of air is further continued, the air enters the foothold device main body 7, and sea water is discharged from the entrance door 5' of a bottom plate 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scaffolding device used for inspecting or repairing the bottom of a ship or the like that is submerged at sea.

[0002]

2. Description of the Related Art Conventionally, in order to inspect or repair the bottom of a ship or the like that is submerged on the sea, FIGS.
The following scaffolding equipment for bottom work is used. FIG. 2 is a schematic explanatory view of a state in which a scaffolding device is installed on a ship bottom 1 in a submerged state. FIG. 3 is a detailed explanatory view of the scaffold device. Reference numeral 10 denotes a scaffolding apparatus main body composed of a rectangular cylindrical body having a flange 11 protruding from the four peripheral edges of the upper edge.
Is fixed. Reference numerals 13 and 13 denote buoyancy tanks installed on the left and right side walls of the scaffolding device body 10, respectively.
14 is a compressed air cylinder installed on the inner wall of the scaffolding device main body 10, 15 is a mesh floor plate of the scaffolding device main body, and 15 'is an entrance into and out of the scaffolding device main body provided on a part of the mesh floor plate.

In order to inspect or repair a submerged ship bottom using the above scaffolding apparatus, first, the scaffolding apparatus main body 10 is moved to a target location on the ship bottom 1 by a suspension device installed on the ship. I do. Then, by opening the valve of the cylinder 14 and supplying air into the buoyancy tanks 13, 13, the scaffolding device main body 10 is pressed against the ship bottom 1 via the packing material 12, and the cylinder 14 or the cylinder is placed in the scaffolding device main body 10. Air is supplied from a turbo blower on the ship, and water in the scaffolding device main body 10 is drained from the mesh floor plate 15 to make the inside of the device an atmospheric space. Thereafter, an operator enters the scaffolding device from the entrance 15 ′ and inspects the bottom 1. , Repair work. In some cases, a video camera or a robot is provided in the scaffolding apparatus main body 10 so that an operator can perform inspection and repair work on the bottom of the ship unattended without entering the scaffolding apparatus.

In the above-described conventional scaffolding device, inspection and repair work at a certain location is completed, and when the scaffolding device main body 10 is transferred to the next location, the scaffolding device main body 10 is used to facilitate the transfer of the scaffolding device main body 10. It is necessary to submerge the inside. Therefore, it takes time to prepare work because the scaffolding device must be filled and drained each time. In addition, when a video camera or a robot is installed in the scaffolding device main body 10, the equipment in the scaffolding device main body 10 is installed. Since all the articles must be provided with waterproof means, there is a problem that extra equipment is required for the equipment and the equipment cost increases.

[0005]

SUMMARY OF THE INVENTION The present invention provides a scaffolding apparatus for bottom work, which improves the above-mentioned conventional problems, reduces equipment costs with simple equipment, and can transfer the scaffolding apparatus body in a short time. The purpose is to:

[0006]

Means for Solving the Problems A scaffolding apparatus body having a combing 2 mounted on a ship bottom and a buoyancy tank 4 and having an upper part protruding into an air reservoir P in the combing 2 and movable in the air reservoir P. 3 and a device for supplying air to the air reservoir P.

[0005]

Next, an embodiment of the present invention will be described with reference to FIG. A floating ring-shaped combing 2 for forming an air pocket P on the lower surface of the ship bottom 1 is mounted so as to include the portions a, b, and c where inspection and repair of the ship bottom 1 are intended. The combing is made of a tough and flexible material such as a synthetic resin material, and can be mounted in close contact with the bottom of the ship by buoyancy by injecting air and expanding in a floating ring shape.

Reference numeral 3 denotes a ship floor work scaffolding device main body (hereinafter referred to as a scaffolding device main body) having an open upper surface and formed in a box shape.
Buoyancy tanks 4, 4 having lower surfaces opened on both left and right side walls or four circumferential side walls of the main body are formed. Note that a plurality of buoyancy tanks may be provided in parallel over the entire side wall or at intervals on the side wall. Reference numerals 6 and 6 denote rollers supported on the top of the scaffolding apparatus main body and abut on the bottom 1 of the scaffold, and are moved in the combing 2 by being pulled by a rope R from a winch or the like installed on the ship. Reference numeral 5 'denotes an entrance door provided on the floor plate 5 of the scaffold device main body. Reference numeral 7 denotes a turbo blower installed on the ship, and air is supplied into the combing 2 and the buoyancy tank 4 through an air supply pipe 8.

Next, the method of using the scaffold for bottom work according to the present invention will be described. First, the combing 2 is inflated by injecting air into the combing 2 and set at a target location where inspection and repair of the ship bottom 1 is intended. Next, the buoyancy tanks 4 and 4 of the scaffolding apparatus body 3 are shifted to a position below the combing 2 while operating a winch on the ship in a state in which some air is sealed in the buoyancy tanks 4 and 4 to give buoyancy. The air from the turbo blower 7 is injected into the inside, the scaffolding device main body 3 floats, the upper part of the scaffolding device main body 3 protrudes into the combing 2, and the rollers 6, 6 are brought into contact with the ship bottom 1.

[0008] Air from the turbo blower 7 is injected into the space surrounded by the combing 2 to form an air reservoir P. When the supply of air is continued, air enters the scaffold device main body 3 from the air reservoir P, and The seawater filled in the device main body is discharged from the entrance door 5 ′ of the floor plate 5 and the scaffold device main body 3
The inside can also be formed in an air atmosphere. Then, the worker enters the scaffolding apparatus main body from the entrance door 5 ', and can perform the inspection and repair work of the ship bottom in the same state as performing the work in the atmosphere.

[0009]

According to the present invention, the combing 2 is brought into close contact with the bottom of the ship, and the air pool P is formed in the space surrounded by the combing 2.
Is formed, and the upper part of the scaffolding device main body 3 having the buoyancy tank 4 is protruded into the air reservoir P, and the roller 6 provided on the top of the main body is brought into contact with the bottom 1 of the ship. Movement can be performed quickly, work time can be significantly reduced, and work efficiency can be improved and equipment costs can be reduced.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a scaffolding device for ship bottom work according to the present invention.

FIG. 2 is an explanatory view showing a state in which a conventional bottom work scaffolding device is set on the bottom of a ship.

FIG. 3 is a detailed explanatory view of a conventional scaffolding device for ship bottom work.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Ship bottom 2 Combing 3 Scaffolding device main body 4 Buoyancy tank 5 Floor plate 5 'Door for entrance 6 Roller 7 Turbo blower 8 Air supply pipe 10 Bottom scaffolding device main body 11 Flange 12 Packing material 13 Buoyancy tank 14 Compressed air cylinder 15 Reticulated floor plate 15' Inlet P Air pocket R rope

Claims (2)

[Claims] 1. A combing (2) mounted on the bottom of a ship and a buoyancy tank (4). An upper portion of the combing (2) is protruded into an air reservoir (P). A scaffolding device for bottom work, comprising: a movable scaffolding device main body (3); and a device for supplying air to the air reservoir (P). 2. A scaffolding device according to claim 1, wherein a roller (6) projects from the top of the scaffolding device body (3).