JP2004141005A - Float made of metal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a readily manufacturable float made of a metal and having large pressure resistance. <P>SOLUTION: The float comprises a hollow body 1 composed of two bowllike split bodies 4a and 4b, a tube 2 passing through a hole 10 provided in the bottom of each split body and passing through the body 1 and a reinforcing body 3 provided in the interior of the body. The float is characterized as follows. The body 1 is obtained by making an opening edge 5a of one split body 4a to be swallowed into the inside of the opening edge 5b of the other split body 4b and welding an opening end face 14 of the other split body to the outer lateral face of the one split body 4a. The reinforcing body 3 has a hole 6 for passing the tube 2 therethrough and the periphery of the reinforcing body 3 is brought into contact with and welded to the opening edge 5a of the one split body 4a. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a metal float used for locking a fishing net or the like at a predetermined position on the sea.
[0002]
[Prior art]
Floats used for fishing nets and the like may be pulled into the water together with the fishing nets when the sea is rough, and are required to have a pressure resistance that does not cause damage even if they sink into the water to some extent. In order to improve the pressure resistance, the material of the member constituting the float may be made tough or thick, but this is not preferable because the weight becomes heavy and the buoyancy becomes small. Therefore, as described in Patent Literature 1, ribs are provided on the surface of the float to reinforce it. Further, if the ribs are protruded on the surface, the resistance received from the tidal current or the like increases, which is inconvenient. Therefore, the ribs may be protruded and provided inside the float.
[0003]
Further, most of the recent floats are provided so as to penetrate a pipe, and a rope such as a fishing net is inserted through the pipe and attached. As a structure of such a float, there is a structure formed by joining two bowl-shaped divided bodies as described in Patent Document 2. Further, as shown in FIG. 5, a reinforcing rib 13 protruding toward the center may be provided at the opening edge of the divided body 15 in some cases.
[0004]
[Patent Document 1]
Japanese Utility Model Laid-Open No. 52-11677 (page 3, FIG. 1)
[Patent Document 2]
JP-A-3-54093 (page 2, FIG. 1-3)
[0005]
[Problems to be solved by the invention]
In a float used in a severe environment or a large float, even if the ribs are provided and reinforced as described above, the pressure resistance is not sufficient, and the float may be deformed or damaged. Further, in the case of the structure in which the bowl-shaped divided bodies are joined, there is a disadvantage that the divided parts are easily damaged from the joined portion. The present invention has been made in view of the above circumstances, and has as its object to provide a metal float having high pressure resistance and easy manufacture.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, a metal float according to the first aspect of the present invention comprises a hollow main body composed of two bowl-shaped divided bodies, and a pipe passing through the main body through a hole provided at the bottom of each divided body. And a reinforcing body provided inside the main body, wherein the main body swallows an opening edge of one of the divided bodies inside an opening edge of the other divided body, and an opening end face of the other divided body and one of the divided bodies. The outer surface of the body is welded, and the reinforcing body has a hole through which the tube is passed, and the periphery of the reinforcing body is welded to the opening edge of one of the divided bodies.
[0007]
Further, the invention according to claim 2 is characterized in that the reinforcing body has an upright wall on the outer periphery along the inner peripheral surface of one of the divided bodies.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, a metal float according to the present invention includes a hollow main body 1 in the shape of a rugby ball, a tubular body 2 penetrating along a central axis of the main body 1, and a hollow body 1 provided inside the main body. And a disk-shaped reinforcing member 3 for reinforcing the main body 1 from the inside. The material of these components is an aluminum alloy and is assembled by welding.
[0009]
The main body 1 is composed of two bowl-shaped divided bodies 4a and 4b. As shown in FIGS. 1 and 2, the opening edge 5a of one divided body 4a is changed to the opening edge 5b of the other divided body 4b. And the opening end face 14 of the other divided body 4b and the outer surface of the one divided body 4a are welded. The opening edge 5b of the other divided body 4b is enlarged by the thickness of the divided body to swallow the opening edge 5a of the one divided body 4a. Further, each of the divided bodies 4a and 4b has a hole 10 through which the pipe body 2 passes at the center of the bottom. The divided bodies 4a and 4b are formed by pressing a plate of about 2 mm in thickness of an aluminum alloy.
[0010]
The reinforcing member 3 is also formed by press-forming a plate material of an aluminum alloy, and as shown in FIG. 3, an upright wall 7 is continuously formed around the entire outer peripheral portion. A hole 6 is provided, and a cylindrical portion 8 is formed around the hole 6. Further, ribs 9 extending radially in the radial direction are formed on the flat plate portion of the reinforcing member 3 by press working. The reinforcing member 3 is fitted into the opening edge 5a of one of the divided bodies 4a, the outer peripheral surface of the upright wall 7 is brought into contact with the inner peripheral surface of the one of the divided bodies 4a, and the opening side is welded. The strength of the reinforcing body 3 is increased by the upright wall 7 on the outer periphery and the ribs 9 arranged radially. By arranging the reinforcing body 3 inside the welded joint of the two divided bodies 4a and 4b, the pressure resistance of the main body 1 is improved. Is dramatically improved. In addition, if the upright wall 7 is provided on the outer periphery of the reinforcing body 3, the reinforcing body 3 is not attached at an angle with respect to the center axis of the main body 1, so that the effect of improving the pressure resistance can be obtained to the maximum. Also, the workability of the mounting is improved. It is not necessary to fix the tubular portion 8 of the reinforcing member 3 to the tubular body 2 by welding, and the inner peripheral surface of the tubular portion 8 and the outer peripheral surface of the tubular body 2 may be in close contact with each other or have a gap. May be. Further, the tubular portion 8 may not be formed.
[0011]
The tube 2 penetrates the main body 1 through the holes 10 provided in the bottoms of the two divided bodies 4a and 4b, and has a diameter-enlarging portion 11 which is bent in a trumpet shape at both ends and expands. The end portions are welded by contacting the outer peripheral surfaces of the hole peripheral portions of the divided bodies 4a and 4b. With such a configuration, the rope of the fishing net inserted through the pipe 2 does not hit the curved surface of the enlarged diameter portion 11 at both ends of the pipe 2 and is not rubbed against the tip or corner. There is little risk of the rope breaking.
[0012]
The procedure for manufacturing the float will be described with reference to FIG. The divided bodies 4a and 4b and the reinforcing body 3 are each formed into a predetermined shape. Initially, the tube 2 is used in a straight state without forming the enlarged diameter portion 11 at the end. First, the reinforcing member 3 is fitted into the opening edge 5a of one of the divided bodies 4a, and is fixed by welding. Next, the opening edge 5a of one divided body 4a is fitted into the opening edge 5b of the other divided body 4b, and is integrated by welding. Next, the tubular body 2 is penetrated through the main body 1, and the enlarged-diameter jigs 12 are inserted into both ends of the tubular body 2 and pressed from both sides to form enlarged-diameter portions 11 at both ends of the tubular body 2. . Finally, both ends of the tube 2 are welded to the outer surface of the main body 1.
[0013]
The invention is not limited to the embodiments described above. The reinforcing body 3 may be a simple plate without the upright wall 7. The material is preferably an aluminum alloy in consideration of ease of processing, light weight, corrosion resistance, and the like, but other metals such as stainless steel and titanium alloy can also be used. The shape of the main body may be spherical or the like.
[0014]
【The invention's effect】
In the metal float according to the first aspect of the present invention, a hollow main body is formed by swallowing one opening edge of the two bowl-shaped divided bodies into the other opening edge and welding. Since the reinforcing member is provided so as to abut the periphery of the opening of one of the divided members, the joint between the two divided members is reinforced from the inside by the reinforcing member, and the pressure resistance of the main body is greatly improved. In addition, with such a configuration, the installation of the reinforcing member and the configuration of the main body are facilitated, and the manufacturing is easy.
[0015]
Further, according to the second aspect of the present invention, the strength of the reinforcing body itself is improved, and the reinforcing body is stably attached in a form that can most efficiently prevent the deformation of the main body. Can be
[Brief description of the drawings]
FIG. 1 is a front view showing a metal float of the present invention in a partial cross section.
FIG. 2 is an enlarged view of a portion A in FIG.
FIG. 3 is a plan view of a reinforcing member.
FIG. 4 is an exploded sectional view showing the metal float shown in FIG. 1;
FIG. 5 is a sectional view showing an example of a conventional float.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main body 2 Tube body 3 Reinforcement body 4a, 4b Split body 5a, 5b Opening edge part 6 Hole (reinforcement body)
7 Standing wall 10 holes (divided body)
14 Open end face of the other divided body

Claims (2)

A hollow main body composed of two bowl-shaped divided bodies, a tubular body penetrating the main body through a hole provided at the bottom of each divided body, and a reinforcing body provided inside the main body, the main body includes one divided body The opening edge of the other divided body is swallowed inside the opening edge of the other divided body, the opening end face of the other divided body and the outer surface of one divided body are welded, and the reinforcing body has a hole through which the pipe passes. A metal float, wherein the periphery of the reinforcing member is welded by contacting the opening edge of one of the divided members. The metal float according to claim 1, wherein the reinforcing member has an upright wall on an outer periphery thereof along an inner peripheral surface of one of the divided members.

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