JP2003104285A - Ship bottom anti-fouling sheet structure for small ship - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily install a ship bottom anti-fouling sheet for preventing adhesion of shellfishes and algae on a ship bottom on a hull, and improve durability. SOLUTION: This anti-fouling sheet for covering a part lower than a draft line of the hull of a small ship so as to prevent the adhesion of the shellfishes and the algae is provided with a main sheet formed by sewing a soft resin waterproof sheet exhibiting flexibility in a hull outer shape in a plane view and arranging a thin plate shaped sub float in a total or partial part corresponding to the ship bottom of the hull, a pair of right and left main floats installed on the main sheet at both side end parts corresponding to right and left gunwales of the hull and extending almost all length from a front part of the hull corresponding to a bow part to a rear part of the hull corresponding to a stem part, a rear part extending part extending backward from a rear end part of the main sheet and bendable upward along a hull rear wall surface of the stem so that the hull rear wall surface can be covered, a hull fixing string for fixing the rear part extending part to the hull, and a mooring string fitting part provided at least on right and left of a front part and a rear part of the anti-fouling sheet.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a bottom antifouling sheet for preventing seaweeds from adhering to the bottom of a ship moored at a marine mooring place such as a bay.

[0002]

2. Description of the Related Art Ships moored in the sea, such as in bays, may cause seaweed to adhere and grow on the bottom of the ship with the passage of time, and if left unattended, not only the navigation performance may deteriorate, but also navigation may become impossible. is there. As a preventive measure, anti-fouling paints have been used for ship bottom coating for a long time, but due to poisonous substances regulations, no anti-fouling paints with sufficient functions have been developed for a long time. For this reason, paint regularly
Alternatively, the seaweeds on the bottom of the ship are removed manually, or they are stored on land, which is expensive. for that reason,
Many inventions have heretofore been made regarding covers for covering ship bottoms. For example, as disclosed in Japanese Patent Laid-Open No. 6-153757, an isolated water area partitioned by a box-shaped waterproof sheet having a ship bottom shape is formed, and an opening / closing port is provided at the rear portion so that the ship can enter and exit. 10-2
It is known that, as in Japanese Patent No. 26393, a seat adapted to the shape of the bottom of a ship is floated on the surface of the water, the ship is slid, and then attached to the hull with a rope. In the former case, since the hull is moored while floating in the isolated water area partitioned by the soft box-shaped tarpaulin, the seat is large and the adhesion to the hull is poor and the effect is small. It is easily affected by tidal current and it is difficult to maintain the box shape.
In the latter, the seats are attached to the hull with a large number of ropes, which is not only troublesome to install but also when the hull is moored at the mooring place, the hulls sway due to the influence of wind and tides, so that the seats and ropes are moored to the mooring piles and There is a risk that the seat or rope will be damaged when it hits an adjacent ship.

[0003]

DISCLOSURE OF THE INVENTION The present invention is easy to attach to and detach from a hull, is cheaper, has good antifouling performance, and is practical.
An object is to provide an antifouling sheet that covers the bottom of a durable ship.

[0004]

SUMMARY OF THE INVENTION The present invention is an antifouling sheet that covers a portion below the waterline of a small boat hull to prevent the adhesion of shell algae, wherein the antifouling sheet is a flexible and flexible material. A main sheet formed by sewing a resin waterproof sheet into a substantially outer shape of the hull in plan view and arranging a thin plate-shaped sub-float corresponding to the bottom of the hull, and the hull of the main sheet. A pair of left and right main floats attached to both side edges corresponding to the left and right port sections and extending over substantially the entire length from the front portion corresponding to the bow of the hull to the rear portion corresponding to the stern, and the rear edge of the main seat A rear extension that extends rearward from the rear part and can be bent upward along the rear wall surface of the stern to cover the rear wall surface of the hull, and a hull fixing string that fixes the rear extension part to the hull. At least antifouling sheet After having the mooring string locking portions provided at the front and rear left and right three places, after sliding a small boat for mooring on the antifouling sheet from the rear part of the antifouling sheet to cover the bottom of the ship, The rear extension portion of the antifouling sheet is bent upward along the rear wall surface of the hull and attached to the hull by a hull fixing cord as appropriate to integrate the antifouling sheet and the hull.

Further, according to the present invention, various sizes of hulls and antifouling sheets are sewn in accordance with a substantially hull shape in plan view, and at least the width of the main seat is attached to both left and right side buoyancy bodies. The seat width was sewn according to the size of various hulls so that the position of the sheet was on the waterline on the side of the ship and outside the width of the hull, and this antifouling sheet was closely attached to the bottom of the hull. It is in.

Furthermore, the main float is a hollow container such as a plastic bottle typified by a synthetic resin hollow pipe with both ends closed, or a beverage container, or a buoyant material formed of an appropriately shaped foam material. The buoyant material is formed by loading the buoyant material into a buoyant material holding portion, which is formed in a tubular bag shape on the left and right side edges of the main sheet and is integral with or separate from the main sheet.

Furthermore, a thin plate-shaped sub-float installed on the main sheet of the antifouling sheet is formed in a strip shape that is long in the front-rear direction of the small ship, and is symmetrical with respect to the center of the bottom of the ship in the left-right direction. It was installed on the ship to improve the adhesion to the bottom of small ships with various bottom shapes.

Furthermore, a synthetic resin hollow pipe extending in the left-right direction of the hull and slidingly contacting the bottom of the ship is installed on the upper surface in the bottom area of the small ship at the rear of the main seat of the antifouling sheet to prevent the small ship from being damaged. The purpose of this is to make it easy to get in and out of the dirty sheet and to easily introduce seawater between the antifouling sheet and the bottom of the ship to reduce unnecessary friction.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a perspective view showing a state in which a small boat 1 moored at a mooring is fitted with a bottom antifouling sheet 2 for a small boat of the present invention. FIG. 2 is a perspective view showing a state where the antifouling sheet 2 for a small boat of the present application is moored at a mooring place,
Further, FIG. 3 is a sectional view taken along the line III-III in FIG. At the mooring, mooring piles 13 as mooring equipment corresponding to at least the right and left of the bow and stern of the small boat 1 are installed, and the small boat 1 moors the right and left of the bow and the stern to the mooring piles 13, respectively. The small ship antifouling sheet 2 is also moored by connecting with a rope 10 for mooring, and the left and right sides of the front part corresponding to the bow and the rear part corresponding to the stern are also moored. The mooring rope 10 is locked via an annular locking tool 12 which is vertically passed through a mooring pile 13, and the locking position is formed so that the locking position can be raised and lowered according to the small boat 1 moving up and down due to the ebb and flow of the tide. .

The antifouling sheet 2 for a small boat is made of a flexible soft resin waterproof sheet which is sewn into a substantially outer shape of a hull in plan view and which is a thin or partially thin sub-float corresponding to the bottom of the hull. From the front part corresponding to the bow of the hull to the rear part corresponding to the stern, the main seat 3 formed by arranging 6 is attached to both side edge parts corresponding to the left and right starboard parts of the hull of the main seat 3. A pair of left and right main floats 4 extending over substantially the entire length of the main seat, and a rear portion that extends rearward from the rear edge of the main seat and can be bent upward along the rear wall surface of the stern to cover the rear wall surface of the hull. It is formed by the extension portion 5 and a hull operation string that fixes the rear extension portion to the hull, and covers the hull below the draft surface of the small boat.

A thin plate-shaped sub-float 6 corresponding to the bottom of the antifouling sheet 2 is arranged in whole or in part, and the main seat 3 is brought into close contact with the bottom of the ship by its buoyancy, and enters between the main seat 3 and the bottom. By discharging the seawater, it is possible to more effectively prevent seaweeds from adhering to the bottom of the ship. Further, the sub-float 6 is formed in a strip shape, and its longitudinal direction is symmetrically installed with respect to the center in the left-right direction along the longitudinal direction of the antifouling sheet, that is, the small boat 1, and is arranged in a plurality of rows. This allows the main seat 3 to be closely attached to the bottom of the ship by following various shapes of the bottom of the ship, further along the front-back direction of the small ship 1, and further in the front-back direction at the center of the main seat 3 in the left-right direction. A groove-like water conduit 7 is formed by providing a portion along which the sub-float 6 is not installed, and when the main seat 3 is pushed down by the ship bottom when mounted on the hull, the water conduit is formed between the main seat 3 and the ship bottom. Seawater easily enters through 7 and acts as a lubricant to reduce the friction between the ship bottom and the main seat 3, so that it is possible to smoothly move in and out of the antifouling sheet 2.

Main floats 4 are attached to the left and right side edges of the main seat 3 along the left and right port portions of the hull over substantially the entire length from the front portion corresponding to the bow portion to the rear portion corresponding to the stern portion. The main float 4 includes a hollow container made of synthetic resin, which is closed at both ends, a hollow container such as a PET bottle typified by a beverage container, or a buoyancy member 4a formed of a foam material having an appropriate shape. The buoyancy material holding portion 4b, which is formed in a tubular bag shape with the main seat 3 integrally with or separately from the left and right side edges, is formed by loading the buoyancy material, or the left and right side edges of the main seat are A buoyant member 4a in the form of a thin plate is extended outwardly, and the buoyant member 4a is overlapped and wound on the extended portion to form a cylindrical shape.

Further, the main float 4 has flexibility such that it can be curved in accordance with the shape of the hull when the antifouling sheet 2 is attached to the small boat 1, while the tidal current is generated when the small boat 1 is detached. It is desirable to have an appropriate rigidity capable of maintaining the shape of a substantially hull even under the influence of, and a flexible frame member 8 such as a vinyl chloride pipe may be provided inside.

A hollow pipe made of synthetic resin, such as vinyl chloride, extending in the left-right direction of the hull is installed on the upper surface in the bottom area of the small ship at the trailing edge of the main sheet of the antifouling sheet, and rigidity is provided at the edge of the main sheet. The structure is such that the antifouling sheet can be prevented from being entangled with the hull that would prevent the antifouling sheet from being attached, and the antifouling sheet can be easily slid under the hull.

[0015]

As described above, according to the structure of the bottom antifouling sheet for a small ship according to the present invention, the following effects can be obtained. Since the main seat is sewn according to the shape of the hull in plan view, it can be made small and lightweight, has a simple structure and is easy to assemble, and is easy to carry and handle. In addition, the rigidity of the main float provided on the port side of the soft resin waterproof sheet and the buoyancy of the sub-float cause the main sheet to float on the surface of the water, which makes it difficult for wrinkles to form on the main sheet. Can be floated while maintaining the posture, and it can also serve as a guide for the hull when the boat is put on the seat, and the antifouling sheet can be closely attached to the bottom of the ship with good appearance.

Further, the buoyancy of the sub-float, which corresponds to the bottom of the ship or is partially installed, improves the adhesion to the bottom of the ship, so that the sub-float can be attached to small ships of various structures without being restricted by the shape of the bottom of the small ship. Since the water that has infiltrated between the bottom of the ship and the antifouling sheet is discharged to the outside by the buoyancy of the sub-float, the amount of water in contact with the bottom of the ship is extremely small and the adhesion of scales as well as seaweed can be prevented.

Further, since the rear wall of the hull is extended from the rear part of the main seat and is covered with a sheet which can be bent upward along the rear wall of the main seat, the antifouling range can be expanded and at the same time. By fixing it to the hull with the operation string on the rear wall surface of the hull, the movement will be the same as the hull.
The antifouling sheet can prevent deterioration of durability due to friction with the hull even when it is in constant contact with the bottom of the ship.

Further, when the antifouling sheet is set on a mooring point of a small boat and the small boat is slid on the seat from the rear of the seat, a hollow pipe made of synthetic resin is installed at the rear of the seat. , You can easily slide the boat in without clinging to the seat. The seaweeds attached to the sheet can be easily dried in the sun because of its simple structure and lightweight, and can be easily removed by killing the seaweeds. I can bear it. Since harmful coating on the bottom of the ship for the purpose of preventing the adhesion of shell algae is not necessary, water contamination can be completely prevented.

[0018]

[Brief description of drawings]

FIG. 1 is a perspective view of a ship bottom antifouling sheet according to the present invention mounted on a hull.

FIG. 2 is a state in which only the bottom antifouling sheet for a small boat according to the present invention is moored.

FIG. 3 is a sectional view taken along the line III-III according to the embodiment of FIG.

[Explanation of symbols]

1: Small boat 2: Small boat Antifouling sheet for ship bottom
3: Main seat 4: Main float 4a: Buoyancy material
4b: Buoyant material holding part 5: Rear extension part 6: Sub float
7: Water conduit 8: Frame member 9: Hollow pipe
10: Rope for mooring 11: String for fixing hull 12: Locking tool
13: Mooring pile 14: Mooring rope

Claims (6)

[Claims] 1. A bottom antifouling sheet for a small ship, which covers a portion below the waterline of a hull of a small ship to prevent the adhesion of shell algae, wherein the antifouling sheet is a soft resin waterproof sheet having flexibility. A main seat formed by sewn into a substantially outer shape of the hull in plan view and arranging a thin or plate-like sub-float corresponding to the bottom of the hull, and both sides corresponding to the left and right port parts of the hull of the main seat Attached to the edge, a pair of left and right main floats extending over substantially the entire length from the front part corresponding to the bow of the hull to the rear part corresponding to the stern,
A rear extension portion that extends rearward from the rear edge portion of the main seat and can be bent upward along the rear wall surface of the stern to cover the rear wall surface of the hull, and the rear extension portion is fixed to the hull. A structure of a bottom antifouling sheet for a small boat, which comprises a hull fixing cord and mooring cords provided at least on the front and rear sides of the antifouling sheet. 2. The sewing machine according to claim 2, wherein the sizes of various types of hulls and the size of the main seat are sewn according to the shape of the hull in plan view, and at least the width of the main seat is set on the left and right sides of the main float. 2. The structure of a bottom antifouling sheet for a small boat according to claim 1, wherein the width of the main seat is sewn according to the sizes of various hulls so as to be positioned outside the hull width on the waterline. 3. The main float attached to the left and right edges of the main sheet is a hollow container such as a plastic bottle typified by a synthetic resin hollow pipe with both ends closed or a drinking water container, or an appropriate shape. The buoyancy material formed of the foam material is formed by loading the buoyancy material into a buoyancy material holding portion formed in a tubular bag shape integrally with the main sheet or as a separate sheet. The structure of the bottom antifouling sheet for a small ship according to 1 or 2. 4. A main float mounted on both left and right edges of the main seat, wherein both left and right edges of the main seat are extended outward, and a thin plate-shaped buoyancy member is overlapped and wound on the extension. The structure of the bottom antifouling sheet for a small ship according to claim 1 or 2, which is formed in a cylindrical shape. 5. The plate-shaped buoyant body installed on the main sheet of the antifouling sheet is formed in a strip shape that is long in the front-rear direction of the small ship and is symmetrical with respect to the horizontal center of the bottom portion of the ship. The structure of the antifouling sheet for small ships according to claim 1, wherein the structure is provided. 6. A synthetic resin hollow pipe extending in the left-right direction of the hull and slidingly contacting the bottom of the small ship is installed on the upper surface in the bottom area of the small ship behind the main seat of the antifouling sheet. The structure of the bottom antifouling sheet for a small ship according to any one of claims 1 to 6.