Sea chest lattice hinge structure

Abstract

To provide a sea chest lattice hinge structure capable of achieving 90 degree opening in a sea chest lattice.SOLUTION: A sea chest lattice hinge structure has: a hinge shaft which is arranged inside the ship side of a sea chest and at a distance from a sea chest opening end; and a modified U-shaped hinge whose one end can rotate around the hinge shaft, and whose the other end extends in the same direction as the hinge shaft in the outside of a hull straddling a sea chest opening frame opening to an outer board on a ship side, and fixed to the sea chest lattice.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a hinge structure for an opening grate (strainer) of a sea chest (a seawater intake into a ship's hull). [Background technology]

[0002] The applicant of the present application has already proposed the disclosure of Japanese Patent No. 6236502 regarding a grid (strainer) for a sea chest (seawater intake port into the hull) of a ship. The disclosure of Japanese Patent No. 6236502 relates to an invention titled "Strainer for Seawater Intake Box Inlet," and in its problem to be solved by the invention, it states that "the object is to provide a strainer for the inlet of a seawater intake box that has a simple structure, a small number of parts, is easy to manufacture, allows for reduction in manufacturing costs, and has a large seawater intake area, allowing the strainer itself to be made small, and is easily adaptable to the seawater intake boxes of various ships" (see paragraph 0007 of the specification of the same publication), and that "a strainer for the inlet of a seawater intake box for cooling onboard equipment that is installed on the bottom of a ship below the waterline, has a trapezoidal uneven shape in plan view, has a flat top portion on the inside of the ship with no height difference, and has a flat bottom portion on the outside of the ship with no height difference that is longer than the flat top portion. The structure is "consisting of a single sheet of corrugated punched metal having a support part and a large number of holes on both flat surfaces and the entire side surface between them, and an angle frame into which the corrugated punched metal is fitted and which can be easily attached to the bottom of the ship and can be half-opened at the top and bottom" (see the description of claim 1 in the patent application), which has the following unique effects (1) "it has fewer parts and a simpler structure than conventional strainers with complex lattice shapes, making it easier to manufacture; (2) it is also expected to reduce manufacturing costs; and (3) it ensures strength and thickness and increases the passage area, making it suitable for use on various types of ships" (see paragraph 0009 in the specification of the patent application).

[0003] Figure 5 is a schematic diagram of the stern showing an example of the arrangement of a seawater intake box (sea chest) installed on the bottom of the ship near the engine room for cooling the main engine and other components in the ship's engine room, as shown in Figure 3 of Japanese Patent Publication No. 6236502, and Figure 6 is a schematic diagram of a conventional strainer used at the inlet of the seawater intake box shown in Figure 5 and shown in Figure 4 of the same publication, as viewed from the bottom of the ship.

[0004] In Figures 5 and 6, reference numeral 100 denotes a hull, 101a and 101b denote seawater intake boxes, 102 denotes an engine room, 103 denotes a propeller, 104 denotes a steering room, 105 denotes a rudder, 106 denotes a waterline during navigation, 107 denotes a hull shell, 108 denotes a doubling plate (reinforcement member), and 110 denotes a strainer. The "sea chest" shown in the title of the present invention corresponds to the "seawater intake boxes 101a and 101b" shown in Japanese Patent No. 6236502, and the "grating" corresponds to the strainer 110 shown in the same. Although not clear from Figure 6, the hinge and its shaft for opening the strainer 110 shown in Japanese Patent No. 6236502 were actually arranged inside the grating (strainer 110) (the reference numerals follow the reference numerals in Japanese Patent No. 6236502).

[0005] However, the seawater intake boxes 101a, 101b (sea chests) shown in Patent Publication No. 6236502, shown in Figure 6, have openings measuring at most A (approximately 400 mm) x B (approximately 600 mm), which is just large enough for a worker to enter and work inside when installing components inside the sea chest. When a worker tries to enter the sea chest and opens a conventional strainer 110 to the outside of the ship, the frame of the strainer 110 interferes with the opening in the hull, making it impossible to open the strainer 110 to 90 degrees, which causes problems when installing components inside or when performing maintenance such as removing debris. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 6236502 Summary of the Invention [Problem to be solved by the invention]

[0007] Therefore, in order to solve the above problems, the present invention aims to provide a sea chest (seawater inlet) grid (strainer) hinge structure that enables the sea chest grid to be opened 90 degrees. [Means for solving the problem]

[0008] In order to solve the above problem, the invention of claim 1 of the present application is characterized in that, in a lattice hinge structure of a sea chest that opens into the bottom of a ship and takes in seawater, it has a hinge shaft that is positioned inside the side of the sea chest and spaced apart from the opening end of the sea chest, and a modified U-shaped hinge that has one end that can rotate on the hinge shaft and the other end that extends in the same direction as the hinge shaft outside the hull, straddling the sea chest opening frame that opens into the side outer plating, and is fixed to the sea chest lattice. [Effects of the Invention]

[0009] When carrying out installation work inside the sea chest, the opening range of the sea chest grating has been expanded to an opening of 90 degrees, making it easier for workers to enter the sea chest, improving workability and ease of installation. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a schematic diagram showing a first embodiment of a sea chest lattice hinge structure according to the present invention. [Figure 2] FIG. 2 is a schematic diagram illustrating the joined and attached state of the modified U-shaped hinge 3 and its operation when the lattice 2 of the sea chest lattice hinge structure 1 according to the first embodiment is in an open state. [Figure 3] FIG. 3 is a schematic diagram illustrating the joined and attached state of the modified U-shaped hinge 3 and its operation when the lattice 2 of the sea chest lattice hinge structure 1 according to the first embodiment is in a closed state. [Figure 4]FIG. 4 is a diagram showing the outline of the size of the lattice 2 of the sea chest 101 and the size of the modified U-shaped hinge 3. [Figure 5] FIG. 5 is a schematic diagram of the stern showing an example of the arrangement of seawater intake boxes (sea chests) provided on the bottom of the ship near the engine room for cooling the main engine and other components in the engine room, as shown in FIG. 3 of Japanese Patent Publication No. 6236502. [Figure 6] FIG. 6 is a schematic view of a conventional strainer used at the inlet of the seawater intake box shown in FIG. 5 and shown as FIG. 4 in Japanese Patent Publication No. 6236502, viewed from the bottom of the ship. DETAILED DESCRIPTION OF THE INVENTION

[0011] An embodiment of the sea chest lattice hinge structure according to the present invention will be described in detail with reference to the accompanying drawings. [Example]

[0012] FIG. 1 is a schematic diagram showing a first embodiment of a sea chest lattice hinge structure according to the present invention. In FIG. 1, reference numeral 1 denotes the sea chest lattice hinge structure according to the first embodiment, 2 denotes a lattice (corresponding to the strainer 110 in FIG. 6), 3a and 3b denote modified U-shaped hinges, 4a and 4b denote horizontal fixing metal fittings for the sea chest lattice that close the sea chest lattice, 5a and 5b denote vertical fixing metal fittings for the sea chest lattice, 101 denotes a sea chest opening, 107 denotes a hull shell plating, and 108 denotes an opening frame plate (corresponding to the doubling plate 108 in FIG. 6), showing a state in which the lattice (corresponding to the strainer 110 in FIG. 6) 2 is opened 90 degrees (hereinafter, the strainer 110 in FIG. 6 will be described as the lattice 2 according to the first embodiment, and the doubling plate (reinforcement member) 108 in FIG. 6 will be described as the opening frame plate 108 according to the first embodiment, and the same members shown in FIG. 6 will be designated by the same reference numerals). Although Figure 1 shows the sea chest opening on the side of the ship, in reality it opens on the bottom shell as shown in Figure 5, and when the grid is closed it is fastened with sea chest grid fixing brackets 4 and 5.

[0013] 2 and 3 are schematic diagrams illustrating the joined and attached state of the modified U-shaped hinge 3 of the sea chest lattice hinge structure 1 according to the first embodiment and its operation, with Fig. 2 showing the lattice 2 in an open state and Fig. 3 showing the lattice 2 in a closed state, both being schematic diagrams viewed from the inside of the sea chest 101. In Figs. 2 and 3, reference numeral 2 denotes the lattice (strainer), 3 denotes the modified U-shaped hinge, 6 denotes the hinge mounting plate, 7 denotes the hinge bearing, 8 denotes the hinge shaft, 107 denotes the aforementioned hull shell plate, and 108 denotes the opening frame plate (doubling plate).

[0014] As is clear from Figs. 2 and 3, the hinge 3 in the sea chest lattice hinge structure 1 according to the first embodiment is a modified U-shaped hinge 3 that allows for a large rotation radius in order to achieve a rotation angle of 90 degrees. That is, the sea chest lattice hinge structure 1 according to this embodiment 1 comprises a hinge shaft 8 arranged inside the ship's side (inside) of the sea chest 101 at a predetermined distance from the sea chest opening end 101, and a modified U-shaped hinge 3 having one end rotatable about the hinge shaft 8 and the other end extending in the same direction as the hinge shaft 8 outside the hull across a sea chest opening frame 108 that opens into the ship's side outer plating 107 and fixed to the sea chest lattice 2.

[0015] By adopting such a structure, the sea chest lattice hinge structure 1 according to Example 1 allows the sea chest lattice 2 to be opened widely by 90 degrees without interfering with the opening of the sea chest 101, making it easier for workers to enter the sea chest 101 with the lattice 2 opened, improving the ease of construction and workability when carrying out installation work inside the sea chest, etc.

[0016] The distance at which the hinge shaft 8 is spaced from the sea chest opening end 101 inside the sea chest must be the size of the sea chest opening 101, i.e., the size or shape of the modified U-shaped hinge must correspond to the size of the sea chest opening 101, i.e., the size of the sea chest lattice 2. If these do not correspond in size or shape, the 90-degree opening will not be achieved. In the sea chest lattice hinge structure 1 according to this embodiment 1, when the size of the lattice 2 is A (mm) x B (mm), a suitable relationship is required between the hinge width C (mm), depth D (mm), and depth E (mm) from the hinge axis 8.

[0017] FIG. 4 is a diagram showing the size of the lattice 2 of the sea chest 101 and the size of the modified U-shaped hinge 3. Specifically, as shown in FIG. 4, in the sea chest lattice hinge structure 1 according to this embodiment 1, a lattice 2 having dimensions A (about 400 mm) x B (about 600 mm) with a width C (220 mm), a depth D (189 mm), and a depth E (126 mm) from the hinge axis 8 is used, and the maximum opening angle is 90 degrees, and when closed, the surface of the lattice 2 can rotate to coincide with the surface of the opening frame plate 108.

[0018] The sea chest lattice hinge structure 1 according to the present embodiment 1 is configured as described above, so that when performing installation work inside the sea chest, the opening range of the sea chest lattice is expanded to an opening of 90 degrees, making it easier for workers to enter the sea chest, improving construction and workability. [Industrial Applicability]

[0019] The present invention is used in a hinge structure for an opening grate (strainer) of a sea chest (a seawater intake port into the hull of a ship). [Explanation of symbols]

[0020] 1 Sea chest lattice hinge structure according to the first embodiment 2. Grate (corresponding to strainer 110 in Figure 6) 3a, 3b Modified U-shaped hinge 4a, 4b Sea chest lattice horizontal fixing bracket 5a, 5b Sea chest lattice vertical fixing hardware 6 Hinge mounting plate 7 Hinge bearing 8 Hinge axis 100 Hull 101a, 101b Seawater inhalation box 102 Engine Room 103 Propeller 104 Wheelhouse 105 Rudder 106 Underway Waterline 107 Hull shell 108 Doubling plate (reinforcement member) 110 Strainer

Claims

[Claim 1] In a lattice hinge structure of a sea chest that opens to the bottom of a ship and takes in seawater, a hinge shaft disposed within the side of the sea chest at a distance from the open end of the sea chest; a modified U-shaped hinge, one end of which is rotatable about the hinge shaft and the other end of which extends in the same direction as the hinge shaft on the outside of the hull across a sea chest opening frame that opens into the side shell plating and is fixed to a sea chest lattice; A sea chest lattice hinge structure characterized by having:

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