Lightweight fender with bulletproof performance

Abstract

The present invention relates to a lightweight fender with ensured bulletproof performance, and more particularly, to a lightweight fender with ensured bulletproof performance, in which the interior is formed in the form of expanded foam to ensure the lightness of the fender, and a woven fiber sheet is laminated to improve the durability and bulletproofness of the fender. The present invention can provide a lightweight fender with ensured bulletproof performance, including a core layer (10) formed by foaming a synthetic resin in the center of the interior of the fender, an intermediate layer (20) formed by laminating the core layer (10) so as to wrap the outside of the core layer (10), a bulletproof layer (30) formed by laminating a woven fabric on the outside of the intermediate layer (20), and a cover layer (40) formed by laminating the bulletproof layer (30) so as to wrap the outside of the bulletproof layer (30).

Description

[Technical field]

[0001] The present invention relates to a lightweight fender with ensured bulletproof performance, and more particularly to a lightweight fender with ensured bulletproof performance, in which the interior is formed in the form of expanded foam to ensure the lightness of the fender, and a woven fiber sheet is laminated to improve the durability and bulletproofness of the fender. [Background technology]

[0002] Fenders, also called shock-absorbing materials or protective materials, are buffer equipment installed to prevent damage to a ship by absorbing and mitigating the impact that may occur between a ship and a pier when the ship comes alongside the pier. Various types have been developed depending on the purpose of use, and depending on the installation method, there are attached types that are attached to piers or ship hulls, etc., and floating types that are not fixed to piers, ship hulls, or piers but are floated on the water surface in front of them.

[0003] Conventional floating fenders are widely used in the form of pneumatic fenders, which have a tube body filled with compressed air. They have a greater shock absorption effect than attached fenders, and the fenders automatically move up and down in response to changes in the water level, naturally adjusting the ship's docking position.

[0004] Attached fenders are fixed to structures such as quays with bolts, while floating fenders are mainly installed by attaching rotatable rings to flanges formed on both ends of a highly buoyant fender and connecting them to a chain of an appropriate length, with both ends of the connected chain hung and fixed to the quay of the berthing facility.

[0005] That is, conventional ships are protected by fenders of various shapes that are fixed to the quay or attached to the hull, and conventional fenders are mainly made of elastic rubber material to enhance the impact absorption effect.

[0006] However, when fenders are used for a long period of time, their surfaces become worn or damaged due to frequent external impacts and friction, reducing their durability. In addition, the fenders require periodic replacement and repair in terms of appearance, which results in problems of repair costs and time.

[0007] In addition, fenders for attachment to ship hulls are mainly used for military or police high-speed short boats (RIBs: Rigid Inflated Boats), which must be able to demonstrate maneuverability. For this reason, a lightweight fender is required that can maintain durability against gunfire from enemies or criminals, prevent the sinking of high-speed short boats or ships, and does not reduce maneuverability.

[0008] In order to solve these problems, Korean Patent Registration No. 10-1516091 discloses technology relating to a modular fender belt including an air tube, a first cover portion, and a second cover portion. However, this technology has the problem that it is difficult to manufacture due to the existence of many processes that require backstitching, such as backstitching to join the first cover portion and the second cover portion, and inserting a fixed rope into the upper and lower ends of the first cover portion and then backstitching. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Korean Patent Publication No. 10-1516091 (registered on April 22, 2015) Summary of the Invention [Problem to be solved by the invention]

[0010] The present invention has been devised to solve these problems, and its purpose is to provide a lightweight fender that ensures durability and bulletproof performance while maintaining mobility by reducing the specific gravity of the rubber in the fender to reduce the weight and ensure light weight, and by laminating woven fiber sheets.

[0011] Another object of the present invention is to provide a lightweight fender with bulletproof performance, which is lightweight due to the interior being formed in the form of expanded foam, and can exhibit bulletproof performance more effectively than a fender having an air layer inside.

[0012] The object of the present invention is not limited to the above-mentioned object, and other objects not described above will be clearly understood by those having ordinary skill in the technical field of the present invention from the following description. [Means for solving the problem]

[0013] In order to achieve the above object, according to a preferred embodiment of the present invention, a lightweight fender with ensured bulletproof performance includes a core layer 10 formed by foaming a synthetic resin in the center of the interior of the fender, an intermediate layer 20 formed by laminating the core layer 10 so as to wrap the outside of the core layer 10, a bulletproof layer 30 formed by laminating a woven fabric on the outside of the intermediate layer 20, and a cover layer 40 formed by laminating the bulletproof layer 30 so as to wrap the outside of the bulletproof layer 30.

[0014] The intermediate layer 20 is characterized in that it is coated with an ozone-resistant material to prevent damage to the core layer 10.

[0015] Here, the ozone resistant material is characterized by being formed by coating with thermoplastic polyurethane.

[0016] Also, the bulletproof layer 30 is characterized by using an aramid fabric woven with 20 to 30 plies.

[0017] At this time, the bulletproof layer 30 is formed by laminating a plurality of sheets of the aramid fabric on the upper part of the intermediate layer 20 . Effect of the Invention

[0018] As described above, the lightweight fender with bulletproof performance according to the present invention has an advantage that the inside is formed in the form of expanded foam, thereby reducing the specific gravity of the rubber and reducing the weight, and therefore the user can move the fender to a desired position or location for easy use and storage.

[0019] In addition, the lightweight fender with bulletproof performance of the present invention has the advantage of reducing the weight that increases with the installation of fenders on high-speed boats and ships, thereby reducing the burden on fuel consumption due to the increased weight, the reduced maneuverability of the ship, and the restrictions on the number of crew members. [Brief description of the drawings]

[0020] [Figure 1] FIG. 1 is a diagram showing a cross section of a lightweight fender with ensured ballistic performance according to a preferred embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] The advantages and features of the present invention, as well as the methods for achieving them, will become apparent from the detailed description of the embodiments described below in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments described below, and may be realized in various different forms. The present embodiments are provided only to complete the disclosure of the present invention and to fully inform those skilled in the art of the present invention of the scope of the invention, and the present invention is only defined by the scope of the claims.

[0022] Hereinafter, specific details for implementing the present invention will be described in detail with reference to the accompanying drawings. Regardless of the drawings, the same part numbers refer to the same components, and "and / or" includes each and every combination of one or more of the described items.

[0023] The terms used in this specification are for describing the embodiments and are not intended to limit the present invention. In this specification, the singular form includes the plural form unless otherwise specified. As used in this specification, "comprises" and / or "comprising" do not exclude the presence or addition of one or more other components in addition to the components described.

[0024] Unless otherwise defined, all terms (including technical and scientific terms) used herein may be used in the sense commonly understood by those having ordinary skill in the art to which the present invention belongs. Furthermore, terms defined in commonly used dictionaries are not to be interpreted ideally or excessively unless specifically defined otherwise.

[0025] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0026] FIG. 1 is a diagram showing a cross section of a lightweight fender having ensured bulletproof performance according to a preferred embodiment of the present invention.

[0027] As shown in FIG. 1, the lightweight fender having bulletproof performance according to a preferred embodiment of the present invention has a body formed by sequentially laminating a core layer 10, an intermediate layer 20, a bulletproof layer 30, and a cover layer 40.

[0028] That is, the fender has a four-layer structure in which the core layer 10 is formed in the interior center of the fender, the intermediate layer 20 is formed on the outer surface of the core layer, the bulletproof layer 30 is formed on the outer surface of the intermediate layer 20, and the cover layer 40 is sequentially laminated on the outer surface of the bulletproof layer 30.

[0029] First, the core layer 10 is the central material of the fender according to the present invention, and is very light in weight, has elasticity, and is capable of absorbing shock.

[0030] At this time, the core layer 10 is in the form of foam obtained by foaming synthetic resin and forms the inside of the fender.

[0031] The core layer 10 is formed to have the highest specific gravity in the fender and is formed in the form of a solid foam made by foaming synthetic resin, so it has elasticity, is capable of absorbing shock, and is very lightweight.

[0032] On the other hand, conventional fenders are heavy, and when installed on ships such as high-speed boats that require bulletproof performance, there is a problem that the maneuverability of the high-speed boat is reduced and the number of passengers on board must be limited. However, the fender of the present invention ensures light weight as the core layer 10 is made of expanded foam.

[0033] Here, the synthetic resin constituting the core layer 10 is preferably polyurethane.

[0034] Generally, polyurethane is a polymeric compound that has a urethane bond -NHCOO- in the repeating unit of the main chain. When a monomer (polyisocyanate) having two or more isocyanate groups is mixed with a monomer (polyol) having two or more alcohol groups, the isocyanate group and the alcohol group undergo an additive reaction to form polyurethane, which has excellent elasticity and is more resistant to ultraviolet rays and ozone than rubber materials, making it very weather-resistant and durable, as well as having excellent abrasion resistance and aging resistance.

[0035] At this time, the core layer 10 can be formed in a proportion of 70 to 95% or more, and preferably in a proportion of 80 to 85%, in the fender.

[0036] If the core layer 10 accounts for more than 95% of the fender, there is a problem that the durability of the core layer is reduced and it may be damaged in a strong collision, and if the core layer accounts for less than 70%, there is a risk that the weight increases, the maneuverability is reduced, and the number of passengers on board may have to be limited, and there is a problem that the impact absorption capacity is reduced.

[0037] In other words, by forming 80 to 85% of the core layer 10 from polyurethane foam made by foaming polyurethane, the weight of the fender can be reduced and the maneuverability of the ship can be maintained.

[0038] Next, the intermediate layer 20 is formed by laminating the core layer 10 so as to wrap the outside of the core layer 10 .

[0039] The intermediate layer 20 is located between the core layer 10 and the bulletproof layer 30 in the fender and serves to prevent damage to the core layer.

[0040] Specifically, the core layer 10 is formed of polyurethane foam to ensure light weight, and since the fender is exposed to seawater and ultraviolet rays for a long period of time, the intermediate layer 20 is formed by coating the outer surface of the core layer 10 to prevent damage to the core layer 10.

[0041] Here, the intermediate layer 20 is formed by coating to prevent damage to the core layer 10, and is preferably formed of a similar material to improve adhesion to the core layer 10.

[0042] At this time, it is appropriate that the intermediate layer 20 is coated with an ozone-resistant material, and preferably, the intermediate layer 20 is coated with thermoplastic polyurethane (TPU). Thermoplastic polyurethane is an ozone-resistant and saltwater-resistant material, and can protect the core layer 10, which is made of polyurethane and vulnerable to seawater, from ultraviolet rays and seawater.

[0043] That is, the intermediate layer 20 is a layer formed by coating the outer surface of the core layer 10 with TPU, an ozone-resistant material, to prevent damage to the core layer 10, and occupies the relatively smallest specific gravity in the fender.

[0044] Next, the fender of the present invention can be installed and attached to a ship having the bulletproof layer 30, thereby providing a place where passengers can avoid gunfire in an emergency situation where firearms are used, such as combat.

[0045] The bulletproof layer 30 is formed by laminating a woven fabric on the outer side of the intermediate layer 20 .

[0046] Here, the bulletproof layer 30 is a layer having a bulletproof function formed of a material having high tensile strength and elasticity so that a bullet cannot penetrate the layer. In the present invention, it is preferable to form the bulletproof layer 30 from aramid fiber.

[0047] Generally, aramid fiber is an aromatic polyamide fiber with amide bonds (-CONH-), and has excellent tensile strength, toughness, heat resistance, and elasticity. It also has high strength and elastic modulus, does not burn or melt, and is carbonized at 500℃ or higher, making it flame-retardant.

[0048] In this case, in the present invention, the bulletproof layer 30 preferably uses an aramid fabric woven with 20 to 30 ply aramid fibers, rather than using aramid fibers in the form of a sheet, and more specifically, the bulletproof layer 30 uses an aramid fabric woven in the form of a fabric using 20 to 30 ply aramid fibers as warps and wefts.

[0049] Here, the bulletproof layer 30 is formed by laminating woven aramid as warp and weft threads in a fabric form. This is because if the bulletproof layer 30 is formed on the fender in the form of unwoven raw threads, sufficient bulletproof performance cannot be ensured.

[0050] In addition, when the bulletproof layer 30 is manufactured in the form of a fabric using aramid of less than 20 ply, the bulletproof performance is secured as compared to the case of a yarn form, but there is a problem that the bulletproof performance is insufficient. When the bulletproof layer 30 is manufactured in the form of a fabric using aramid of more than 30 ply, there is a problem that as the thickness increases, it is not easy to laminate on the fender and the weight of the fender increases.

[0051] According to a preferred embodiment, the present invention forms the bulletproof layer 30 by laminating an aramid fabric woven from 25 ply aramid fibers so as to wrap the outside of the intermediate layer 20 .

[0052] More preferably, the bulletproof layer 30 is suitably formed by winding the intermediate layer 20 in a roll shape with aramid fabric woven with aramid fibers so as to wrap the outside of the intermediate layer 20 formed on the outer surface of the core layer 10, and it is preferable to fix the roll shape of the bulletproof layer 30 by forming Velcro (registered trademark) on the end of the aramid fabric and fastening the Velcro.

[0053] Next, the cover layer 40 is laminated to enclose the outer side of the bulletproof layer 30 .

[0054] At this time, the cover layer 40 is formed on the outermost shell of the fender to protect the bulletproof layer 30 from seawater and ultraviolet rays.

[0055] Specifically, the cover layer 40 is formed outside the bulletproof layer 30, i.e., at the outermost portion of the fender, and is therefore directly exposed to seawater and ultraviolet rays. In order to prevent damage to the bulletproof layer 30 caused by seawater and ultraviolet rays, it is preferable that the cover layer 40 be formed from an ozone-resistant, abrasion-resistant, and saltwater-resistant material.

[0056] The cover layer 40 is wound in a sheet shape along the outer periphery of the bulletproof layer 30 and laminated to wrap the outside of the bulletproof layer 30 .

[0057] That is, the cover layer 40 is made by processing an ozone-resistant, abrasion-resistant, and saltwater-resistant material into a sheet shape and laminating it on the outside of the bulletproof layer 30. At this time, the cover layer 40 is processed into a sheet shape for ease of operation.

[0058] According to an embodiment, the cover layer 40 is formed of an environmentally friendly material, and is formed by adhering chlorosulphonated polyethylene (CSM) rubber processed into a sheet shape to the outside of the bulletproof layer 30.

[0059] Generally, chlorosulfonated polyethylene rubber is a synthetic rubber made by reacting polyethylene with chlorine and sulfur dioxide gas to convert it into a vulcanizable elastomer. It has excellent resistance to ozone, oxygen, heat, decay, oil, weather and chemicals, and retains its color even when exposed to the outside for long periods of time.

[0060] According to another embodiment, the cover layer 40 is formed by attaching a sheet of chloroprene rubber (CR) made of a weather-resistant material to the outside of the bulletproof layer 30 .

[0061] As is well known, chloroprene rubber has excellent weather resistance, ozone resistance, and aging resistance. Therefore, when the cover layer 40 is formed of chloroprene rubber, the improved weather resistance, ozone resistance, and durability result in an extension of the replacement cycle of the fender, thereby reducing costs and maintenance expenses.

[0062] At this time, the chloroprene rubber (CR) sheet may be attached to the outside of the bulletproof layer 30 by using any of a hot plate fusion, hot air fusion, ultrasonic fusion, high frequency fusion, and electric fusion to form the cover layer 40, but is not limited thereto.

[0063] In addition, the cover layer 40 can be manufactured into a sheet shape and then coated with polyurea. Polyurea is a polymer compound containing urea bonds in its molecular structure, and has excellent anticorrosive and antifouling properties and is effective in preventing adhesion of marine organisms such as shellfish and barnacles. It is particularly suitable as a coating agent for various marine structures, and has excellent weather resistance and durability as it is more resistant to ultraviolet rays and ozone than rubber materials.

[0064] Meanwhile, the lightweight fender with bulletproof performance according to the present invention is formed inside with expanded foam, so that it is lightweight and does not reduce the maneuverability of ships and high-speed boats, can be easily installed and removed, and exhibits a bulletproof effect superior to that of fenders with an air layer formed inside.

[0065] In addition, the specific gravity of the rubber is reduced to reduce the weight and ensure light weight, thereby maintaining maneuverability, while the bulletproof layer 30 made of bulletproof material is provided inside to ensure bulletproof performance.

[0066] In this case, the lightweight fender with bulletproof performance according to the present invention is formed with a bulletproof layer 30, and in unexpected situations where firearms are used, such as combat on high-speed boats and ships, the fender can provide a bulletproof space that blocks bullets, thereby protecting the safety of passengers.

[0067] In addition, the lightweight fender with bulletproof performance of the present invention has a core layer formed of polyurethane foam at a ratio of 70 to 95%, and has a weight of around 15 kg, making it easy for users to handle, and has the advantages of being easy to move the fender and able to be replaced individually.

[0068] In addition, the lightweight fender with bulletproof performance of the present invention is formed in a ratio of 70-95:0.5-1.5:13-17:2-4 in the total volume of the fender, which means that a lightweight fender that exhibits bulletproof properties while ensuring light weight can be provided.

[0069] Although the embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art will understand that the present invention can be embodied in other specific forms without changing the technical idea or essential features of the present invention. Therefore, it should be understood that the above-described embodiments are illustrative in all respects and are not limiting. [Explanation of symbols]

[0070] 10 Core Layer 20 Middle Class 30 Bulletproof Layer 40 Cover Layer

Claims

1. A core layer (10) formed by foaming a synthetic resin in the center of the interior of the fender; an intermediate layer (20) formed by laminating the core layer (10) so as to wrap the outside of the core layer (10); a bulletproof layer (30) formed by laminating a woven fabric on the outer side of the intermediate layer (20); and a cover layer (40) formed by laminating the bulletproof layer (30) so as to wrap the outside of the bulletproof layer (30).

2. The lightweight fender with bulletproof performance as set forth in claim 1, wherein the intermediate layer (20) is formed by coating an ozone-resistant material to prevent damage to the core layer (10).

3. The lightweight fender with bulletproof performance as set forth in claim 2, wherein the ozone resistant material is formed by coating with thermoplastic polyurethane.

4. The lightweight fender with bulletproof performance as set forth in claim 1, wherein the bulletproof layer (30) is made of an aramid fabric woven with 20 to 30 ply.

5. The bulletproof layer (30) is formed by laminating a plurality of sheets of aramid fabric on the upper part of the intermediate layer (20).

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