Small watercraft capsizing device

Abstract

To provide a device for preventing the capsize of a small ship.SOLUTION: This device is composed of a bulbous balancer 1, a vertical support arm 2, and a close contact cushion rubber, and the bulbous balancer is an electric type (with a manual function), is movable in the vertical direction, and is half-stored in a recess 3 of a ship bottom.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] This invention relates primarily to a capsize prevention device for small vessels. It is known that in rough ocean weather, vessels often experience a floating hull phenomenon, resulting in capsizing, especially when rough waves or high waves come from the rear at an angle, or when the vessel's length is in line with or close to the wave wavelength. Fishing vessels, in particular, often return to port with surplus seafood tied to the rear of their ships, which can lead to capsizing due to small waves. To address this issue, this technology combines a movable balancer designed to lower the vessel's center of gravity and stabilize water flow with a hull structure designed to improve stability. [Background technology]

[0002] In modern times, the current state of ship technology has seen continuous improvements in fuel-efficient, high-power engines, lighter hulls, and stronger ships. However, when examining ship capsizing accidents, it is found that the main causes are human recklessness and lack of technology. Regardless of whether the ship is small or large, the logic that preventing capsizing, especially when faced with waves from diagonally behind, depends on maneuvering skill remains. The only way to reduce the loss of life due to capsizing is to improve the stability of the ship itself, which is the technology of this invention. Summary of the Invention [Problem to be solved by the invention]

[0003] Traditional small vessels often ignore the importance of balancing the position and amount of cargo, and fishing vessels in particular do not meet this basic requirement, and in their haste to return to port, they ignore the waves from behind. It is known that winds and waves at sea change in complex ways. Balancing cargo is of course necessary, but human intervention sometimes leads to forgetting accuracy. Also, with a focus on speed, both shipbuilding companies and buyers want sleek hulls, but some kind of measure is needed for the sake of human life. Means to solve the problem

[0004] Claim 1, which is the means for solving the problem in this invention, basically involves installing a balancer under the hull with the aim of improving the stability of the ship when sailing at sea in rough weather. This is a movable, extendable bulb balancer that can be set according to the degree of roughness of the waves, which has a different meaning from the balance keel of a yacht.

[0005] Claim 2 is an innovation in the structure of the hull itself that is added to this technology to reduce lateral heeling and improve stability, and in particular to reduce the heeling of fishing boats caused by side waves, a centrally separated bulkhead structure is used that halves the tilting water pressure of the full-width storage tank, which is common in current ships.

[0006] Furthermore, claim 3 provides that in order to improve the buoyancy of the upper hull, the upper side and deck (excluding the harvested fish loading / unloading port) are made tank-shaped (air-sealed), thereby increasing stability and buoyancy and strengthening the ship's ability to restoring.

[0007] The results of a small-scale experiment using the overall structure of claims 1 to 3 confirmed the stability of the structure against various types of waves (assumed height, speed, and angle), and it was understood that this was due to a synergistic effect.

[0008] This invention greatly improves the stability and righting performance of small vessels, and has a significant effect on safety, especially in fishing boats, where capsizing accidents are common, when combined with the ability to respond to situations by adjusting the depth setting of the movable balancer.Theoretically, it is expected to be applicable to vessels with a displacement of 100 tons or more. [Brief explanation of the drawings]

[0009] [Figure 1] The basic structure of the device and hull of claims 1 to 3, and a longitudinal cross-sectional view [Figure 2] Plan view of claims 1 to 3 (partial interior) DETAILED DESCRIPTION OF THE INVENTION

[0010] Figure 1 is a cross-sectional view of the core structure showing claim 1, characterized by an electrically operated (with manual function) up and down movement type, and the storage section is located above the ship's side to prevent capillary action. It consists of three components: a bulb balancer that is partially stored in a recess in the bottom of the ship, a vertical support arm, and a tight-fitting cushion rubber.

[0011] This device sets the fore-and-aft position taking into account the center of gravity and overall length of the ship, but the best position is 3 to 6 percent aft of the center point of the overall length, and consideration must be given to the location of the wheelhouse.

[0012] In addition, the maximum lowering position of the bulb balancer is basically 50 percent of the ship's overall length, and the lowering position is adjusted and fixed according to wind and wave conditions. When entering a port, etc., it is necessary to be sure to be aware of the water depth by installing an alarm or other device.

[0013] FIG. 2 is a plan view (partially inside) of claims 1 to 3, showing the shape of compartments for improving stability and buoyancy for fishing boats.

[0014] The structure based on the form of claim 1 of the present invention is one of the safety devices, and even if it conflicts with the regulations for ship construction, it is thought that it is possible to solve the problem by treating it as an integrated structure.

[0015] A structure based on the form of claim 1 of the present invention is advantageous because it is easy to repair and replace, and the installation of the storage system also serves as a framework that improves the strength of the hull.

[0016] It is important that the bulbous balancers installed in claims 1 to 3 of the present invention are made of metal, and the weight basically should be about 10% to 15% of the displacement weight of the hull. [Example]

[0017] The theoretical suitability of the device of the present invention has been demonstrated through model construction, so we believe it will be easy to promote its use as actual practical equipment. [Industrial Applicability]

[0018] The general-purpose small vessel capsize prevention device of this invention is intended to be particularly applicable to fishing vessels, and is a technical device that aims to curb, even if only a little, the high number of fatal accidents involving small bottom trawl fishing vessels.We believe that there is great potential for it to be used as technology to reduce capsize accidents caused by the natural dangers and unstable conditions that attack fishing vessels that are tied to the side and returning to the voyage in an effort to pull one last time during times of good catches.

[0019] After inventing and considering the scope of application, we believe that there are technological elements that can be applied not only to small vessels but also to medium and large vessels. We believe that this is a fundamental technology that can be developed and used by the shipping industry based on its basic form and shape.

[0020] We believe that this invention will provide a basic technology that can reduce the current rate of capsizing accidents by providing a stabilization measure for monohulls, which are difficult to construct with outriggers or catamaran shapes. [Explanation of symbols]

[0021] 1 bulbous balancer (front hemisphere / rear cone) 2 vertical support arms 3 Storage recess 4. Windlass (bolt rotation type) 5. Hoisting bolt 6 total cabins 7 Central bulkhead 8-frame bulkhead 9. Water storage tank 10 Water storage tank hatch

Claims

1. The shape and structure of a movable balancer for preventing a vessel from capsizing in rough weather and rough waves.

2. A structure of a loading bay of a ship's hull that improves the stability of the ship according to claim 1.

3. 2. The airtight side and deck structure of claim 1 that enhances the buoyancy performance.

Images