KR101233722B1 - Buoyancy structure and amphibious leisure device including the same - Google Patents

Abstract

The amphibian moving body of the present invention includes a buoyancy body which is moved on land or in the water, and the buoyancy body is formed of an overlapping structure in which the second frame surrounds the first frame with the first frame as the basic frame.

Description

BUOYANCY STRUCTURE AND AMPHIBIOUS LEISURE DEVICE INCLUDING THE SAME}

The present invention is formed through foam molding, manufactured in a laminated structure, having a superimposed frame, light weight, resistant to external impact, mass production, and can improve the restoring force by the characteristics of the buoyancy body itself The present invention relates to a buoyant body capable of adjusting its own weight and an amphibious mobile vehicle including the same.

Existing vessels and leisure boats are made of materials such as metal, FRP, wood, and air tubes. Although these materials have been universally used for a very long time, most of them are manufactured with the same specific gravity, so that the buoyancy material itself cannot improve resilience or adjust its own weight by location. In addition, mass production was difficult, and based on water activities, it is relatively resistant to external shocks.

In response to the trend of leisure expansion, leisure equipment that can operate both water and land at the same time is in the spotlight. However, since most of the existing buoyancy materials are used, entry and exit into the water and land are frequently issued, and when colliding with underwater reefs and rocks on the ground, there is a risk of watertight destruction, flooding and overturning. There was a problem that caused it.

In addition, the existing military amphibious vehicle was also made strong and heavy made of iron, such as bullets to withstand external shocks. Therefore, the scale of the equipment was very large to generate the buoyancy to overcome the load.

Military boats are also required to be manufactured using lightweight, bulletproof, and highly elastic materials instead of conventional rubber and air materials.

In order to solve these existing problems, it is formed through foam molding, manufactured in a laminated structure, and has a superimposed frame, which is light in weight, resistant to external impact, can be mass-produced, and resilient by the characteristics of the material itself. We propose a new buoyant body that can improve the self-weight control.

The present invention has been made in consideration of the above-mentioned needs, and provides a buoyant body having a light weight, good buoyancy, and capable of mass production with securing mechanical strength, and an amphibious mobile body including the same.

In one embodiment, the buoyancy body of the present invention is a stack of a plurality of frames including a foam in a laminated structure.
In one embodiment, the buoyancy body of the present invention includes a foam and a frame, and the foam is made of polyether-based polyurethane or polyester-based polyurethane.
In one embodiment, the polyether-based polyurethane comprises a polyisocyanate, a high molecular weight diol and a low molecular weight diol, a coating layer is formed on the surface of the foam, the coating layer is made of a polyurea containing an isocyanate and an amine The adhesion of the coating layer to the surface of the foam is enhanced according to the adhesion of the polyurea and the polyether-based polyurethane or the adhesion of the polyurea and the polyester-based polyurethane.
The buoyancy body of the present invention is a laminate of foam and frame. The foam is made of polyurethane and the frame comprises a first member and a second member.
The first member comprises an axle or through cylinder penetrating the foam or recessed in the foam, the second member facing at least a portion of the first member as a mesh of metal or nonmetal, and the first member And the second member is foamed together with the foam to increase the rigidity of the foam.
In one embodiment, the foam comprises a first foam and a second foam, the coupling means is interposed between the interface of the first foam and the second foam, the coupling means is adhesive, bolts, nuts, steel or synthetic resin At least one of the pins, wherein the adhesive comprises an isocyanate group.
In an embodiment, the first member and the second member are foam-molded together with the foam, and the first member is the primary skeleton and the second member overlapping the first member is the secondary skeleton. The foam is formed into a composite structure.
In one embodiment, the assembling projections projecting a portion of the frame to the outside and the assembling hole to which the assembly projections are fastened by recessing a portion of the frame.
In one embodiment, the air is accommodated in the through cylinder during the water operation to ensure buoyancy and restoring force.
In one embodiment, the buoyancy body of the present invention is a lamination of a foam and a through cylinder. A propulsion means is provided inside the through cylinder, and at least one of a first opening, a second opening, and a third opening in which a part of the through cylinder is opened is provided, and water is moved by the propulsion means in the third opening direction. As a result, the driving force of the water is generated.
In an embodiment, the first opening, the second opening, and the third opening may be sequentially disposed, the first opening may be opened and closed, the first opening may be closed upon entering the water phase, and the second opening may be opened during the water driving. The water propulsion force is generated while the water obtained therethrough is discharged toward the third opening via the propulsion means.

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According to the present invention, manufactured by foam molding, made of a laminated structure, made of a superimposed frame structure, light weight, good buoyancy, mass production is possible, with a buoyancy body having a mechanical strength and having it Can make amphibious vehicles.

This provides a significantly improved manufacturing method than utilizing materials such as metal, FRP, and wood that are used in existing vessels and water leisure equipment, and it is possible to adjust the specific gravity of buoyancy materials constituting existing vessels and water leisure equipment. The material or structure itself can improve buoyancy and resilience, and can control its own weight.

In addition, by utilizing the buoyancy body of the present invention in the amphibious moving body that frequently enters and leaves the water, the risk of watertight destruction when colliding with hard objects such as underwater reefs and ground rocks can be reduced. It can dramatically reduce the risk of water fallover that can occur.

On the other hand, when the buoyancy body of the present invention is utilized in the military amphibious mobile body, the bullet-proof material is inserted into the superimposed frame and is manufactured as a light and strong buoyancy body as the foam molding and the laminated structure. Thus, unlike the existing military amphibious vehicle, it is light and strong and can significantly improve the bulletproof effect.

This also applies to military rubber boats, which provide a light, bulletproof and strong elastic buoyancy body instead of rubber tube material, so that unlike military rubber boats, military operations can be performed more safely.

In addition, if the buoyancy body of the present invention is used in small and medium-sized vessels and leisure boats, mass production is possible, and the resilience can be improved by the characteristics of the material or structure itself, and the self-weight can be adjusted to further advanced vessels and leisure boats. You can make a boat and use it safely.

1 is a perspective view showing the appearance of the amphibian moving body of the present invention.
2 is a partial cross-sectional view showing a method of forming a composite structure of the amphibian moving body of the present invention.
3 is a perspective view showing a first frame of the amphibian moving body of the present invention.
4 is an explanatory diagram illustrating a frame forming process of the present invention.
5 and 6 show the buoyancy body cross section of the present invention.
7 and 8 show an axle mounting structure of the rotating unit of the present invention.
Fig. 9 shows an embodiment of the installation position of the axle of the present invention.
FIG. 10 is a perspective view illustrating a state in which a platform is moved as an embodiment of the present invention compared with FIG. 1.
11 to 13 are views for explaining an embodiment designed to have different buoyancy for each part of the buoyancy body.
It is sectional drawing explaining the propulsion action of an auxiliary buoyancy body.
15 to 19 show various other embodiments of the buoyancy body of the present invention.

Hereinafter, with reference to the accompanying drawings will be described an embodiment according to the present invention in more detail. The sizes and shapes of the components shown in the drawings may be exaggerated for clarity and convenience. In addition, terms that are specifically defined in consideration of the configuration and operation of the present invention may vary depending on the intention or custom of the user or operator. Definitions of these terms should be based on the content of this specification.

1 is a perspective view showing the appearance of the amphibian moving body of the present invention. 2 is a partial cross-sectional view showing a method of forming a composite structure of the amphibian moving body of the present invention. 3 is a perspective view showing the first frame 101 of the amphibian moving body of the present invention. 4 is an explanatory diagram illustrating a frame forming process of the present invention.

In one embodiment of the present invention, the 'foam' is made of at least one of aluminum foam, melamine resin foam, EPP (polypropylene), EPS (Styrofoam), EPE (foamed polyethylene), polyurethane.

As an embodiment, when explaining the polyurethane foam molding as follows. Polyurethane is a material capable of foam molding and is classified into soft, semi-rigid, and hard. In order to make a predetermined shape, foam molding can be performed in the shape of a mold 200, and it is light and has a wide range of hardness or strength adjustment. Properties such as elasticity and resilience, heat resistance, oil resistance, abrasion resistance, and flame retardancy can also be controlled through additives in the foaming process, and have the characteristics of changing the cell shape of the internal structure.

When the polyurethane is used in the manufacturing process of the buoyancy body 100, light and strong buoyancy body 100 can be manufactured in large quantities, and if the specific gravity is controlled through lamination and foaming in the manufacturing process, the resilience can be adjusted as desired. Self weight can be adjusted. In addition, inserting the frame for strength strengthening in the overlapping structure during foam molding can greatly improve the strength of the buoyancy body (100).

For example, in a vessel including a general buoyancy body 100, the portion below the odd line C0 affects the center of gravity and the resilience of the vessel in the water, while the portion above the odd line C0 is the overall shape of the vessel. It is configured to play a role in preventing the generation of resilience and water infiltration when the ship is tilted. That is, the buoyancy body 100 constituting the structure above the odd line C0 does not directly affect the operation of the ship.

Accordingly, the buoyancy body 100 under the odd line C0 of the ship utilizes the negative buoyancy body 100 (specific gravity 1.0 or more) that the ship can stably operate in the water and secures the strength above the odd line C0. When the positive buoyancy body (polyurethane specific gravity less than 0.5) is configured to be lighter than the existing vessel structure and lower the center of gravity, it is possible to increase the resilience by adjusting the specific gravity of the buoyancy body 100 itself.

The present invention proposes foam molding of polyurethane as an example of the buoyancy body 100 that can satisfy such conditions. That is, when the foam having a high specific gravity and stable weight is overlapped and inserted into a foamed lower portion, the foamed molding having a low specific gravity and strength maintained is laminated and molded into an upper portion where the foam is laminated.

In addition, the frame and the foam to be inserted into the mold 200 for foam molding is superimposed in various ways. At this time, two different characteristics or phenomena are superimposed and maintained in one form, and each superimposed characteristic does not change even when overlapped. For example of superposition, the first frame 101, which is a frame for strength reinforcement inserted into the mold 200 for foam molding, overlaps the second frame 102 made of foam, or the first foam C1 and The second foam C2 is connected to each other, or the foam corresponding to the second frame 102 is infiltrated and cured between the mesh structures of the first frame 101, or the first frame 101 and the second frame ( 102 overlap each other while maintaining its own characteristics.

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In one embodiment, the buoyancy body 100 is a superimposed of the first frame 101 and the second frame 102, the first frame 101 is a material of at least one of metal, synthetic resin, carbon, wood, fiber The second frame 102 is made of at least one of aluminum foam, melamine resin foam, EPP (polypropylene), EPS (Styrofoam), EPE (foamed polyethylene), and polyurethane together with the first frame 101. It was foam molding.
In one embodiment, the frame includes a first frame 101 or a second frame 102, and the first frame 101 or the second frame 102 includes a first member and a second member. The first member includes an axle 111 or through cylinder 700 penetrating or recessed into the foam. The second member is a metal or nonmetal mesh structure (described in FIGS. 2 to 5) facing at least a portion of the first member, and the first member and the second member are foamed together with the foam to thereby The rigidity of the foam is enhanced.

In the process of manufacturing an amphibious mobile body, the bottom of the buoyancy body 100 has a flat structure in many cases due to the limitation of the configuration of the buoyancy body 100 on the premise of land movement. When the bottom of the buoyancy body 100 is flat, it is advantageous for land movement, but submerged in water deteriorates stability because there is a limit in lowering the center of gravity.

Therefore, in order to lower the position of the center of gravity and improve the water stability in spite of the flat bottom structure, in the amphibian moving body, the specific gravity of the buoyancy body 100 is foamed to increase toward the lower portion of the odd line.

The present invention can be very useful for the improvement of the landing craft made of military amphibious vehicles and rubber boats, such as amphibious armored vehicles.

Embodiment according to the present invention has been described mainly for leisure amphibious moving body. Recreational amphibious vehicles are used for various purposes, such as vehicles, camping spaces, and leisure activities on land or in water. In the amphibian mobile or buoyant body 100, accommodation, cooking, as well as the use of the toilet, washing, bathing is possible, regardless of land or water.

The amphibious moving object includes a buoyancy body 100, a first moving part 110, a second moving part 120, and a screw 160. In an embodiment, the first moving unit 110 and the second moving unit 120 include a plurality of wheels driven by the axle 111, and the first moving unit 110 and the second moving unit 120. ) Is a means of transport on land or in swamps. The first moving part 110 and the second moving part 120 may be manufactured in a caterpillar type without being limited to the illustrated wheel. Screw 160 is a means for moving the buoyancy body 100 in the water phase. The door 360 serves as a passage for the user to enter and exit the buoyancy body 100.

The buoyancy body 100 is formed in a complex structure to reduce the weight for smooth movement and to increase the water stability and buoyancy. That is, it consists of the 1st frame 101 which becomes a basic frame | skeleton, and the 2nd frame 102 added here.

Referring to FIG. 2, a first frame 101 made of at least one of metal, synthetic resin, carbon, wood, and fiber is first introduced into the mold 200, and polyurethane is introduced into the mold 200 in a liquid state. When hardened and hardened, the buoyancy body 100 in which the first frame 101 and the second frame 102 overlap in a composite structure can be manufactured. The buoyancy body 100 in which the first frame 101 for rigidity reinforcement and the second frame 102 for buoyancy reinforcement are superimposed can simultaneously achieve excellent mechanical strength, increase buoyancy, and reduce weight. Such a structure can be mass-produced, and thus can be utilized as a buoyancy body 100 which is very useful for existing ships, leisure boats, military boats and amphibious moving bodies.

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Polyurethanes are urethane polymers polymerized by urethane bonds. Urethane bonds are formed by the heat of reaction between an alcohol having an active hydroxyl group (-OH) and an isocyanate having an isocyanate group (-N = C = O) by an addition polycmrization reaction.

Isocyanates having at least one isocyanate group (NCO Group) and alcohols having at least one hydroxyl group (-OH) are referred to as polyfunctional groups. When functional groups give off high-temperature heat under appropriate conditions and produce a compound having a structure of (-NHCOO-), it is called urethane bond (Uolyurethanc), and more than 1000 molecules are bonded to polyurethane (polyurethane).

Polyurethane is divided into polyester type and polyether type.

Polyester-based polyurethane is made of polyester by reacting propylene glycol and ethylene glycol with adipic acid, and urethane is made of naphthalene-1 and 5-diisocyanic acid with a molecular weight of 3,000 with OH groups at both ends and polymer. . The polyester-based polyurethane produced by this method is harder than the polyether-based polyurethane because it is a slightly foamable material than the polyether-based polyurethane although it differs slightly depending on the difference in soft hardness. Therefore, polyester-based polyurethane is mainly used for products requiring high mechanical strength such as tensile strength and hardness.

In one embodiment, the polyester-based polyurethane is used as the foam of the lower portion of the odd line (C0) that has a high specific gravity and high rigidity in the buoyancy body 100 of the present invention.

On the other hand, polyether-based polyurethane is a high-foaming material, the foam is formed a lot to produce a lightweight product, and because it is lightweight and excellent process formability is utilized as the foam of the upper portion of the odd line (C0).

Polyether-based polyurethanes are prepared from polyisocyanates, high molecular weight diols and low molecular weight diols as main raw materials, and are block copolymers having soft segments consisting mainly of high molecular weight diols and hard segments consisting mainly of polyisocyanates and low molecular weight diols. . Due to this structure, polyether-based polyurethanes exhibit rubber elasticity.

The chemical composition of the polyether-based polyurethanes, the length of the polymer blocks and the secondary and tertiary structures mainly depend on the type of polyisocyanate and high molecular weight diols used and have a great influence on the physical properties of the final polyether-based polyurethane product. .

As an embodiment, the present invention, while paying attention to the high foaming properties of the polyether-based polyurethane to maximize the advantages, such as light weight and increased buoyancy, the disadvantage of the polyether-based polyurethane, particularly as a measure to improve the tensile strength, strong rigidity A buoyant body 100 having a composite structure was formed by using a first frame 101 made of a material as a primary structure, and superposing a polyether-based polyurethane having good foamability therein into a secondary structure. By this multiple overlapping structure, the weight of the buoyancy body 100 is reduced and rigidity is increased.

In one embodiment, the present invention can combine the low foaming and high specific gravity of the polyester-based polyurethane with the high foaming and low specific gravity of the polyether-based polyurethane. Relatively high specific gravity polyester-based polyurethane is used to form the first foam (C1) which is submerged in water, and the relatively low specific gravity polyether-based polyurethane is a second foam (C2) requiring low specific gravity and high buoyancy. By using the molding, it is possible to complete the laminated structure of the buoyancy body 100 through the combination of different foam materials.

On the other hand, the present invention is injected with a polyester-based polyurethane or a polyether-based polyurethane in the mold 200 together with the first frame 101 for rigid reinforcement containing at least one of metal, synthetic resin, carbon, wood, fiber The complex structure of the buoyancy body 100 is completed. In addition, a coating layer may be formed on the surface of the buoyancy body 100 to reinforce the surface strength of the polyurethane.

A low pressure foaming machine is used as an example of a method of injecting polyurethane into the mold 200. In the case of low pressure foamers, two (POL + ISO) components are stored in each tank and transferred to a low pressure of 3 to 5 bar, and then mechanically controlled by rotating the mixer with a motor of 6,000 to 8,000 rpm in the chamber. Mix and wash remaining amount between chamber and mixer.

The buoyancy body 100 has a structure in which a plurality of frames including foams are stacked, and the frame includes a first frame 101 for strength reinforcement and a second frame 102 foamed on the first frame 101. Include. Inject-hardening the second frame 102 using the mold 200 with respect to the first region (reference region I) corresponding to a part of the first frame 101, and then, the second region (reference region II). The mold 200 is moved to harden the second frame 102 to a part of the first frame 101 located in the second region. Accordingly, the foam molding can be completed step by step for each region.

The step-wise foaming is possible because of its strong adhesive strength when foamed in addition to the cured polyurethane foam. The adhesion is very good even for polyurethanes of different specific gravity. By utilizing the characteristics of the polyurethane, the specific gravity of the buoyancy body 100 can be adjusted, as well as inside and outside.

When the buoyancy body 100 is molded, if the width or length of the buoyancy body 100 is long, it may be difficult to form the mold with one mold 200 at a time. As a countermeasure against this, the completed first frame 101 is seated, and then a mold 200 having a size smaller than that of the buoyancy body 100 is prepared and the same work is completed after completing the composite structure forming work for the region I. It is possible to complete the complex structure of the buoyancy body 100 size by batch processing for the region II, III, and IV.

That is, the mold 200 is prepared in the region I (also referred to as 'first region'), injected with polyurethane, and cured, and then the mold 200 is referred to as region II (also referred to as 'second region'). It is possible to complete the buoyancy body 100 composite structure by repeatedly performing a series of batch operations to move the) and to re-inject the polyurethane to cure.

In another embodiment, in order to shorten the production time, a plurality of molds 200 may be prepared from the first mold 200a to the fourth mold 200d, and the polyurethanes may be injected and cured at the same time to refer to I, II, III, and the like. IV You can work on all areas simultaneously.

As an example, a coating layer may be formed on the surface of the buoyancy body 100. Polyurethanes inherently undergo hydrolysis. That is, when a metathesis reaction in which water molecules act as one of the reactants occurs, the polyurethane foam surface may be damaged. When foaming, an additive may be added to change the cell structure of the polyurethane to prevent hydrolysis, but a coating layer may be formed to manufacture the buoyancy body 100 that is more secure and resistant to impact.

As an example of the surface coating of the buoyancy body 100, polyurea is proposed as a coating agent. Polyurea is a two-component paint composed of highly reactive isocyanates and amines. After curing, polyurea is able to form coatings with excellent physical properties and durability.It is very fast in curing, excellent in workability, and can be coated by spray spraying. . Therefore, it is possible to form a thick film on the inclined surface, the vertical surface, or the like of the buoyancy body 100.

Polyurea is excellent in tensile strength, heat resistance, and durability, so that coating the buoyancy body 100 of the present invention can completely compensate for the problem of surface damage, which is a weak point of polyurethane. In particular, when used in the leisure amphibious mobile body is light, but the strength and elasticity is very good, it is possible to protect the buoyancy body 100 very securely even when colliding with obstacles during coating with a suitable thickness (0.5mm or more). In addition, when used in military boats or military amphibious vehicles, it is possible to obtain a bulletproof effect by increasing the thickness of the coating layer. This coating is carried out on the foam surface constituting the second frame 102.

On the other hand, as an embodiment, the ballast portion 300 is provided in the lower portion of the buoyancy body 100 as an active weight reduction and buoyancy increase measures to expand the material properties of the buoyancy body 100.

5 shows an embodiment of the ballast portion 300. Fig. 6 is a plan view of Fig. 5. Fig.

According to this, the ballast portion 300 formed in a separate space from the buoyancy body 100 in the lower portion of the buoyancy body 100 can be used to adjust the buoyancy balance.

5 and 6, there is shown a structure that is easy to balance the left and right balance of the buoyancy body 100 and the front and rear. That is, by forming the ballast partition wall 303 in the space inside the ballast portion 300 to adjust the buoyancy for each section. In addition, the water supply port 304 is formed in the lower portion of the ballast portion cover 302 to allow buoyancy control by natural force without supplying external power, and the ballast portion 300 inside the ballast portion 300. Install an air vent hole 305 for bleeding air.

When the ballast part 300 and the ballast part cover 302 are submerged in the water, when the air vent hole 305 is opened, water flows in through the water inlet 304 and water in any place of the ballast part partition wall 303. The buoyancy balance of the left and right or front and rear directions of the buoyancy body 100 is adjusted according to whether or not the inflow.

For example, if the air vent hole 305 of the region A is closed and the air vent hole 305 of the region A 'is closed, water flows only into the main hole 304 of the region A'. 100) loses buoyancy in the direction of reference A.

Similarly, opening the air vent holes 305 in the regions A and A 'and closing the air vent holes 305 in the regions C and C' only leads to the main pit 304 in the regions A and A '. Since water is introduced, the buoyancy body 100 loses buoyancy in directions A and A '.

This acts as a buoyancy body 100 when the buoyancy body 100 enters the water phase from the land, and in the water surface to hold the center of gravity of the buoyancy body 100 to balance the buoyancy body 100.

7 to 9 are embodiments of the installation position of the axle of the present invention. The axle 111 may be installed to penetrate the buoyancy body 100 or the axle 111 may be disposed outside the buoyancy body 100.

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Referring to this, the axle 111 is installed outside the buoyancy body 100, and the axle 111 receives the driving force by a chain or timing belt 118 interposed between the axle supports 119. In such an embodiment, the separation of the axle 111 and the buoyancy body 100 is very easy, so that the axle 111 can be repaired more easily than the failure repair in the case where the axle 111 penetrates the buoyancy body 100, and parts can be replaced. There is an advantage, it can completely block the watertight destruction of the buoyancy body 100 has a great strength in safety and efficiency.

As another embodiment, the axle may be arranged in connection with the ballast portion 300 shown in Figs. At this time, the sealing unit 130 for securing the watertight is used.

10 is a perspective view illustrating a state in which the platform 500 is moved as compared with FIG. 1. 1 is a state in which the platform 500 is lowered to a position in close contact with the buoyancy body 100 and FIG. 10 is a state in which the platform 500 is elevated to a position spaced apart from the buoyancy body 100. In the state of FIG. 1, the user may ride on the upper side of the platform 500 or enjoy leisure activities such as fishing. In the state of FIG. 10, the empty space formed between the lower side of the platform 500 and the buoyancy body 100. It can be used by the user to ride or to use as a camping space in the water or on land.

That is, in the state in which the platform 500 is raised as shown in FIG. 10 rather than the platform 500 folded as shown in FIG. 1, when the amphibious vehicle is used as a camper, the operating space is increased and the leisure utilization of the user is increased. . Height adjusting means 510 is provided for elevating the platform 500.

For example, the height adjusting means 510 is connected to the lifting table 500 and the buoyancy body 100, and is stretched to enable the lifting of the lifting table 500 in a hydraulic cylinder or bellows shape that can support the load of the lifting table 500. A bellows bellfold that is folded.

In addition, when the platform 500 that is folded when the platform 500 is raised, it needs to block the external space. That is, when the platform 500 is unfolded, a barrier that connects the buoyancy body 100 and the platform is required, and the buoyancy body 100 space in the platform blocked by the barrier can be used as a separate user activity space.

At this time, as the barrier film utilized, the bellows folds folded in a bellows shape may be utilized. When the bellows folds are provided, when the platform is folded, the barrier layer may be effectively utilized so that the inside of the buoyancy body 100 is not exposed to the outside.

11 to 13 are views for explaining an embodiment designed to have different buoyancy for each part of the buoyancy body 100. First, referring to FIG. 11, the buoyancy body 100 may be divided into the second foam C2 of the odd line C0 and the first foam C1 of the odd line C0 based on the odd line C0. . At this time, if the specific gravity of the first foam (C1), which is submerged in water, the greater the specific gravity center of the buoyancy body 100 is lowered and the possibility of overturning lower the water phase stability is improved. To this end, the foamability of the second frame 102 included in the first foam C1 is smaller than that of the second frame 102 included in the second foam C2 so that the specific gravity of the first foam C1 is second. To be larger than foam (C2).

Due to the nature of the amphibian, it is sometimes necessary to have a flat bottom structure. At this time, there is a structural difficulty in securing the center of gravity and resilience in the water. Here, when the positive buoyancy body is used as the material of the buoyancy body 100, it is difficult to secure safety in the water. In order to solve this problem, the density of the first frame 101 and the foam to be inserted when the buoyancy body 100 is molded is adjusted. As a result, the specific gravity below odd-numbered line C0 is comprised so that it may become more than the specific gravity of water at least, and water phase stability is aimed at.

The reason why the second foam C2 is composed of a positive buoyancy body having a low specific gravity is that the buoyancy body 100 above the odd line C0 does not affect the operation when the buoyancy body 100 is operating normally in the water. Due to the point. The buoyancy body 100 above the odd line C0 has a function of securing a restoring force when the buoyancy body 100 is tilted or preventing water from flowing into the buoyancy body 100 due to waves or the like. Therefore, the lower the specific gravity of the second foam (C2) exposed over the water surface, on the premise of ensuring the strength, the better.

According to this, the second foam C2 having a low specific gravity may lower the center of gravity when the buoyancy body 100 is in water operation, and may increase the restoring force through the positive buoyancy of the buoyancy body 100. In this case, even if the volume of the second foam (C2) is significantly increased, the second foam (C2) does not affect the water operation and can reinforce the restoring force significantly. The buoyancy body 100 produced in this way is light in weight to allow the amphibious mobile body to move efficiently on land.

Here, the first foam (C1) and the second foam (C2) may be utilized in the manufacture of rubber boats in which air is generally used. When the overlap laminated foaming is performed in the form of air-injected rubber boats, various weak points of the air-injected rubber boats can be compensated for. That is, the high strength material and structure of the first foam (C1) is used as a secondary device for strengthening the bottom of the boat, it can be solved through the molded foam secured hardness.

In addition, the second foam (C2) may be mentioned as a means for blocking the source of the risk caused by the weakening of the air pressure caused by the breakage of the outer shell of the rubber boat. When the second foam (C2) is molded in the form of a rubber boat, it is possible to secure the positive buoyancy of the rubber boat without injecting air or even injecting air therein, thereby preventing the risk of water damage due to conventional skin damage. When applied to military rubber boats, very safe military operations can be carried out.

Meanwhile, when the buoyancy body 100 of the present invention is used for military purposes, when the first frame 101 is formed of a bulletproof material or an additional bulletproof material is added to the second frame 102, the bullet or debris is buoyant ( 100) It can be prevented from entering the inside, and bulletproof performance can be secured for military use. The method of manufacturing the bulletproof buoyancy body 100 is performed by the same process as the insert method of the first frame 101 in the above-described buoyancy body 100 manufacturing method.

In addition, in order to mold the second frame 102 of the second foam C2 and the second frame 102 of the first foam C1 to have different foaming properties, the second foam C2 and the first foam C1 are formed. It is preferable to mold separately.

Referring to FIG. 12 for the firm coupling thereof, the first frame 101 of any one of the second foam C2 and the first foam C1 is protruded to form an assembly protrusion 101a and the second It is preferable to provide an assembling hole 101b into which the assembling protrusion 101a is fitted by recessing a part of the first frame 101 of the other one of the foam C2 and the first foam C1. At this time, the assembly protrusion of the first frame 101 may be provided by deforming in part or all.

The assembling protrusion 101a and the assembling hole 101b are formed of a metal, synthetic resin, carbon, wood, fiber, or the like of the first frame 101 rather than deforming a part of the second frame 102 having weak strength. It is preferable to provide by changing a structure partially.

On the other hand, apart from forming the assembling protrusion 101a and the assembling hole 101b in the first frame 101, the unevenness is formed in the second frame 102, and the above-mentioned foam molding in the step-by-step of the second frame 102 is performed. When the bonding is performed in the uneven portion, the bonding property in the multi-step molding of the second frame 102 may be improved.

On the other hand, if a pin made of iron or synthetic resin is added to the first foam (C1), so that the pin of the first foam (C1) can be combined with the second foam (C2) when forming foam of the second foam (C2), The binding property of the first foam C1 and the second foam C2 may be reinforced.

In addition, the first foam C1 and the second foam C2, which have already been cured, may be connected to each other to form a laminated structure. In this case, an adhesive or a bonding means may be added to the interface between the first foam C1 and the second foam C2.

In one embodiment, the adhesive utilizes an adhesive including an isocyanate group (-NCO) possessed by polyurethane. Adhesiveness between the adhesive including the isocyanate group (-NCO) component and the polyurethane foam is very good, and adhesion with other materials is possible.

In one embodiment, the joining means is inserted into the mold 200 during the foam molding of the first foam C1 and the second foam C2 and fixed together with the curing of the liquid polyurethane, or the hardened first foam C1. ) And the second foam (C2) is coupled to provide a bonding force. For example, bolts, nuts, pins, and the like.

FIG. 13 shows an embodiment in which the specific gravity in the front and rear directions of the buoyancy body 100 is different. For example, when a driving source 610 including an engine or a motor generating a propulsion force of an amphibious moving body is mounted to the rear portion C33 of the buoyancy body 100, the rear portion C33 of the buoyancy body 100 is It is heavier than the front portion C11. At this time, in order for the front portion C11 and the rear portion C33 to be immersed in water by the same depth for the waterborne stability of the buoyancy body 100, the rear portion C33 of the buoyancy body 100 is compared with the front portion C11. It is desirable to have a smaller specific gravity.

More preferably, the specific gravity of the rear portion C33 where the load distribution is concentrated is the smallest and the specific gravity gradually increases toward the central portion C22 and the front portion C11 where the load distribution gradually decreases. According to this, the foamability of the second frame 102 forming the rear portion C33 is the largest, the foamability of the second frame 102 forming the central portion C22 is smaller than that, and the second frame 102 forming the front portion C11. It is preferable that the foamability of the frame 102 is the smallest. In addition, it is possible to adjust the equilibrium of the buoyancy body 100 by molding thicker than other parts during molding foaming of the rear portion C33 in which the load distribution is concentrated. In this case, the first frame 101 may also be used for adjusting the load distribution.

On the other hand, the auxiliary buoyancy body 400 is attached to the buoyancy body 100 serves to increase the buoyancy. This is to overcome the structural limitations of amphibious vehicles. When the buoyancy body 100 is operated in the sea where the waves are waved, and the wave is expected to be overturned in the big wave, the auxiliary buoyancy body 400 connected to the arm is extended to both sides of the buoyancy body 100 so that it is safe to operate in water. You can do

One embodiment of the auxiliary buoyancy body 400 is also possible in the form of a closed cylinder with the front and rear blocked and empty inside, as shown in Figures 1 and 10. As another example, the principle of the ballast unit 300 shown in Figs. 5 to 7 can be applied by utilizing. Properly utilizing air and water can maintain the balance and stability of the buoyancy body 100 according to the load of the buoyancy body (100).

The auxiliary buoyancy body 400 is connected to the buoyancy body 100 by the arm 490 and can be moved up and down in accordance with the operation of the arm 490. When moving on land, the auxiliary buoyancy body 400 is moved upward so as not to interfere with the running, and when floating in the water, it is preferable that the auxiliary buoyancy body 400 moves downward to be submerged in water to enhance buoyancy. Arm 490 is connected to a hydraulic device for this purpose.

Not limited to this, as shown in FIG. 14, a part of the auxiliary buoyancy body 400 may be opened and a propelling means 420 may be provided therein. Accordingly, water is introduced through the absorption port 410 formed in front of the auxiliary buoyancy body 400, and water is strongly discharged toward the outlet port 430 by the propulsion means 420 provided inside the auxiliary buoyancy body 400. Therefore, the driving force generated by the auxiliary buoyancy body 400 is generated. The propulsion means 420 may be a rotating screw or a water jet. The buoyancy body 100, which is a basic skeleton of the auxiliary buoyancy body 400, is used as a positive buoyancy body to perform a buoyancy generating function together with a driving force.

Meanwhile, FIG. 15 illustrates forming the through cylinder 700 in the buoyancy body 100. FIG. 16 is a cross-sectional view taken along cut line A-A 'of FIG. 15. The through cylinder 700 formed in the first foam C1 or formed between the first foam C1 and the second foam C2 allows the buoyancy body 100 to increase buoyancy when entering the water phase, thereby allowing stable water entry. And, when the buoyancy body 100 is tilted during the water operation to increase the resilience to enable a stable operation.

Referring to FIG. 15 and FIG. 16, the buoyancy body 100 shown is a laminated structure through a plurality of frames including the first frame 101 and the second frame 102 and overlapped by step forming foam or surface coating. The second frame 102, which is a foam, is superimposed on the first frame 101 inserted for rigid reinforcement.

At this time, the first frame 101 and the second frame 102 is formed of a laminated structure that is partially inserted or foam molded of a material having a different specific gravity to form a differentiated region. The differentiated region is, for example, formed of a second submerged body C2 having a portion submerged in water based on the odd line C0 formed of the first foam C1 and a specific gravity lighter than that of the first foam C1. It means the upper side of the odd line C0.

The through cylinders illustrated in FIGS. 15 and 16 may prevent the second foam C2 from submerging in water due to the weight or structural limitations of the first foam C1 region when the second foam C2 region enters the water phase. That is, the through-cylinder is not given a special function in the land driving, but the buoyancy enhancement function when entering the water phase of the buoyancy body 100.

The through cylinder 700 illustrated in FIG. 15 may have a shape in which both sides of the through cylinder 700 are blocked so that water does not flow in order to secure the best buoyancy. In addition, in the manufacturing process of the buoyancy body 100 can be easily formed by inserting the through-cylinder 700 made of a separate component and then lamination foam molding.

Therefore, the through-cylinder 700 shown in FIG. 15 functions to reduce the risk of overturning during buoyancy of the buoyancy body 100 and to enhance water stability, and to reduce the running resistance by reducing the load of the buoyancy body 100 when driving on land. It works.

FIG. 17 shows an embodiment in which both sides of the through cylinder 700 are opened and a propulsion means 420 is provided in the through cylinder 700 to obtain propulsion force in water. 18 is a cross-sectional view taken along the line BB ′ of FIG. 17.

17 and 18 together, a through cylinder 700 is formed inside the foam, and a propulsion means 420 such as a screw or a water jet is provided inside the through cylinder 700. A part of the through cylinder 700 is opened to provide at least one of the first opening 710, the second opening 720, and the third opening 730. The first opening 710 can be opened and closed.

Water introduced through the first opening 710 in the open position during the water driving may be discharged toward the third opening 730 by the propulsion means 420 to obtain the driving force of the buoyancy body 100. The water contained in the through-cylinder 700 during the land running increases the weight of the buoyancy body 100, thereby reducing the land running performance. During land running, the water contained in the through cylinder 700 is discharged to the outside through at least one of the first opening 710, the second opening 720, and the third opening 730. The weight increase factor is eliminated.

At least one of the first opening 710, the second opening 720, and the third opening 730 is opened to discharge the water contained in the through cylinder to prevent an increase in the load of the buoyancy body 100 during land driving. . When all the water in the through cylinder is discharged, whether the first opening 710, the second opening 720, and the third opening 730 is opened or closed does not affect the running of the land.

The first opening 710 is closed when entering the water phase, and the portion of the through cylinder that extends between the first opening 710 and the second opening 720 becomes an empty space to increase the buoyancy of the buoyancy body 100 entering the water phase. . Therefore, the phenomenon that the front part of the buoyancy body 100 is immersed in water and inhibits the water phase stability (nose down) is prevented. When the buoyancy body 100 enters the water phase to some extent, the water obtained through the second opening 720 is discharged to the third opening 730 through the propulsion means 420 to obtain a driving force.

When the buoyancy body 100 is raised on land, the water inside the through cylinder is discharged to the outside of the through cylinder through at least one of the first opening 710, the second opening 720, and the third opening 730. Reduce the load of 100).

The through cylinders shown in FIGS. 17 and 18 play an important role in the water power propulsion method of the amphibian. The propulsion means 420 is a device which is not necessary at all during the land operation, and impedes many obstacles to land movement. If the propulsion means 420 is installed below the buoyancy body 100, there is a fear that the climbing capacity is greatly reduced and damaged when moving on land.

Even when the propulsion means 420 is mounted outside the buoyancy body 100, there is a risk of personal injury as well as damage during running on land. The propulsion means of the through cylinder shown in FIGS. 17 and 18 is designed to overcome these concerns, and can be installed on both sides of the buoyancy body 100 to be used as a waterborne steering device of the buoyancy body 100, thus providing a buoyancy body. It is not necessary to provide a separate direction change key to the 100.

In addition, the through cylinder illustrated in FIGS. 17 and 18 also serves to stabilize the center of gravity of the buoyancy body 100 due to water naturally introduced through the second opening or the third opening after the buoyancy body 100 enters the water phase. do. That is, when the buoyancy body 100 is tilted, the through cylinder shown in FIGS. 17 and 18 instantaneously participates in the center of gravity of the buoyancy body 100 to help increase the restoring force and stability and to balance the buoyancy body 100. Contribute to.

Of course, the water accommodated in the through cylinder 700 is discharged to the outside through the second opening 720 or the third opening 730 during the land running, thereby removing the weight increase factor of the buoyancy body (100).

On the other hand, Figure 19 is made of a general material such as metal, synthetic resin, carbon, wood, fiber, FRP, air tube, etc. to make a first portion 810 corresponding to the lower portion of the buoyancy body 100, the first portion 810 ) Buoyant body 100 having a structure in which a second portion 820 made of at least one of aluminum foam, melamine resin foam, EPP (polypropylene), EPS (styrofoam), EPE (foamed polyethylene), and polyurethane is connected. ).

Accordingly, in order to secure high strength such as coping with obstacle collision, preventing watertight destruction, and coping with reef when driving on land, the first part 810 is placed in the lower part of the buoyancy body 100 without any foam and focusing on the strength reinforcement. Form. Lower portion of the buoyancy body 100 by using a foam to lower the center of gravity, reduce the risk of overturning, enhance water stability, reduce the overall load of the buoyancy body 100, high buoyancy, such as buoyancy enhancement 820 is formed.

If a special case requiring high buoyancy on the lower side of the buoyancy body 100 and high strength is required on the upper side, the lower side of the buoyancy body 100 is formed by the second portion 820, and the buoyancy body (the first portion 810) is used. The upper side of 100 may be formed.

The connection surface 830 is positioned at the boundary between the first portion 810 and the second portion 820, and the first portion 810 and the second portion 820 are firmly coupled to the connection surface 830. Coupling force or connection surface generated when the mold (200 of FIG. 2) is installed on the first portion 810 and the foamed liquid in the connection surface 830 is cured when the second portion 820 is foamed. The coupling force generated by the separate coupling means interposed in 830 tightly couples the first portion 810 and the second portion 820 on the connection surface 830.

The following example is mentioned as such a coupling means.

It comprises an isocyanate group and applies an adhesive to the connecting surface 830 and secures the bonding force of the connecting surface 830 by the adhesive force of the adhesive. The isocyanate group (-NCO) component is a functional group included in the polyurethane, and the adhesive including the isocyanate group makes the adhesive of the polyurethane foam very good.

Alternatively, the connection surface 830 is fixed by using a bolt or a nut connecting the first portion 810 and the second portion 820. Alternatively, a pin made of iron or synthetic resin is disposed on the connection surface 830, and the end of the pin is inserted into the first portion 810 and the second portion 820, respectively, to secure the fastening force of the connection surface 830. .

Alternatively, the protrusion 850 may be formed by protruding a portion of the first portion 810, and the protrusion 850 may be embedded in the second portion 820 to secure the coupling force of the connection surface 830. Alternatively, the concave-convex 840 is formed at the end of the first portion 810 and the end of the second portion 820. Concave-convex 840 expands the area of the joint surface, thereby strengthening the coupling force of the connection surface 830.

According to the structure of FIG. 19, the specific performance required by the buoyancy body 100, such as strengthening the strength of the lower side of the buoyancy body 100 and strengthening the buoyancy of the upper side, may be concentrated for each part. In addition, an existing hull made of metal, synthetic resin, carbon, wood, fiber, FRP, air tube, or the like may be utilized as the first part 810 of the buoyancy body 100, and the second part 820 is used here. By foam molding, the buoyancy body 100 of the present invention can be completed. It also helps to recycle waste ships and reduce the cost of producing buoyant bodies. In addition, when removing the end-of-life foam from the first part 810 and replacing the second part 820 with a new one, the first part 810 is used as it is and the second part 820 is newly foamed, When the pre-cured ready-made second portion 820 is fastened to the first portion 810 by using a coupling means, the buoyancy body 100 is completed, so that the maintenance work of the buoyancy body 100 is smooth.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. Accordingly, the true scope of the present invention should be determined by the following claims.

100 ... buoyancy 101 ... 1st frame
101a ... assembling projection 101b ... assembly hole
102 second frame 110 first moving part
111.Axle 118 ... Chain or Timing Belt
119 axle support 120 ...
130 ... sealing 160 ... screw
200 ... mold 200a ... 1st mold
200b ... second mold 200c ... third mold
200d ... 4th mold 300 ... ballast part
302 ... ballast cover 303 ... ballast bulkhead
304 ... Inlet 305 ... Air vent hole
360 ... door 400 ... secondary buoyancy body
410 Intake 420 Propulsion means
430 ... outlet 490 ... arm
500 platform 510 height adjustment means
610 ... Drive 700 ... Through cylinder
710 ... first opening 720 ... second opening
730 ... third opening 810 ... first part
820 ... Second part 830 ... Connecting surface
840 Unevenness 850 Projection
C0 ... odd line C1 ... first foam
C2 ... 2nd foam C11 ... front
C22 ... Center C33 ... Rear

Claims (28)

delete delete delete Including foam and frame,
The foam is made of a polyether polyurethane or a polyester polyurethane,
The polyether-based polyurethane includes polyisocyanate, high molecular weight diol and low molecular weight diol,
A coating layer is formed on the surface of the foam,
The coating layer is made of a polyurea containing an isocyanate and an amine,
A buoyant body of which the adhesion of the coating layer to the surface of the foam is enhanced according to the adhesion of the polyurea and the polyether-based polyurethane or the adhesion of the polyurea and the polyester-based polyurethane.
Foam and frame are laminated,
The foam is made of polyurethane,
The frame includes a first member and a second member,
The first member includes an axle penetrating the foam or recessed in the foam or a through cylinder formed inside the foam,
The second member faces at least a portion of the first member as a mesh of metal or nonmetal,
A buoyancy body in which the rigidity of the foam is enhanced by foaming the first member and the second member together with the foam.
The method according to claim 4 or 5,
The foam comprises a first foam and a second foam,
A coupling means is interposed at an interface between the first foam and the second foam,
The coupling means comprises at least one of an adhesive, a bolt, a nut, a pin made of iron or synthetic resin,
The adhesive buoyancy body comprising an isocyanate group.
The method according to claim 4 or 5,
The frame includes a first member and a second member,
The first member and the second member are foam molded together with the foam,
A buoyant body in which the foam is formed in a composite structure using the first member as the primary skeleton and the second member overlapping the first member as the secondary skeleton.
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