A Protection Unit For An Installation, Fixed By Means Of A Fastening Member And Having Size Adaptability And Recyclability

Abstract

The present invention relates to a protective material unit for protecting an installation target, such as a door frame, during construction. Specifically, it is characterized by comprising: a first protective material that is cut to a predetermined first unit length and first unit width and has a first bonding area and a second bonding area formed on each of its two sides; a second protective material that is cut to a predetermined second unit length and second unit width and has a third bonding area formed on one side that is identical to the second bonding area; and a fixing member that has a fourth bonding area formed on one side and an adhesive area formed on the opposite side, thereby enabling the protective material to be fixedly installed on the installation target.

Description

Technology Field

[0001] The present invention relates to a protective material unit that is capable of adapting to the size of an installation target, such as a door frame, according to the specifications of the installation target and is recyclable. More specifically, the invention relates to a protective material unit that possesses size adaptability and recyclability by being fixed to an installation target through a fixing member in which a plurality of protective materials are fixed to the installation target and mutually fixed through overlapping, thereby minimizing damage to objects such as furniture, construction materials, and home appliances during the process of moving them in situations such as construction or moving, and reducing damage to the installation target, such as a door frame, and the protective materials during installation and removal. Background Technology

[0002] Generally, elevators are installed in buildings with a certain number of floors or more, such as apartments, commercial buildings, and office buildings. While some buildings are equipped with both freight and passenger elevators, in buildings without freight elevators, cargo is transported using passenger elevators. Immediately after the elevator is installed, or during construction such as remodeling, construction materials, furniture, or home appliances must be transported using the elevator; during this process, damage such as scratches, dents, or dents may occur on the elevator door frame. To prevent damage to the door frame in such situations, protective materials are installed.

[0003] Conventional protective materials are manufactured in the form of rectangular panels and are attached to the inner wall of the door frame using adhesives such as double-sided tape. However, these materials have the problem of causing contamination and damage to the inner wall of the door frame.

[0004] Furthermore, since the protective materials themselves become contaminated and damaged, reusing them is difficult, leading to problems in terms of cost and resource waste, as well as environmental pollution.

[0005] In this regard, the prior registered patent No. 10-1547491 (prefabricated protective material and method of construction thereof) forms a protective material through horizontal connecting members and upper and lower connecting members, thereby increasing the effectiveness of protective material by improving airtightness and impact resistance compared to existing protective methods, and promotes eco-friendliness by using reusable profiles, connecting members, and plate-shaped protective materials, but there are limitations in securing protective material in areas where it is difficult to fix the protective material, such as curved shapes and the edges of thin door frames. The problem to be solved

[0006] The present invention aims to provide a protective material unit that solves the problems of the conventional technology described above by minimizing contamination and damage to the inner wall of an installation target, such as a door frame, and the protective material, as well as enabling more reliable fixing through a fixing member during the connection between protective materials and the installation target, while also improving convenience and stability during construction and minimizing damage to the protective material during installation and removal, thereby allowing for recycling. means of solving the problem

[0007] To achieve the above objective, a protective material unit having size adaptability and recyclability according to one embodiment of the present invention comprises: a first protective material configured by being cut to a predetermined first unit length and first unit width, having a first bonding area and a second bonding area formed on each side; and a second protective material configured by being cut to a predetermined second unit length and second unit width, having a third bonding area identical to the second bonding area formed on one side. A fixing member comprising: a first side having a fourth coupling area formed therein that can be attached and fixed to the second coupling area, and an opposite side having an adhesive area formed therein that can be fixed to the installation target of the first protective material, so that when installed on the installation target through the adhesive area, the first protective material is attached to the fourth coupling area and the first protective material is fixedly installed on the installation target; wherein the first coupling area and the second coupling area are configured in a structure that can be attached and fixed to each other, so that a plurality of the first protective materials can be connected and fixed to each other in the length or width direction, or the second protective material can be connected and fixed to the first protective material, wherein the first protective material is installed on the side wall side door frame of the installation target, and the second protective material is connected and fixed to the first protective material while covering an area corresponding to the ceiling or floor door frame, and the first protective material is configured in an L-shape or U-shape to wrap around the side wall, and the third coupling area is on both ends in the length direction of the second protective material It is formed such that the length of the second protective material is longer than the length of the ceiling or floor of the door frame, and is characterized by being connected and fixed by folding the third connecting area at both ends of the second protective material at a right angle and contacting the first connecting area of ​​a pair of first protective materials installed on the side wall.

[0008] The first protective material is installed on the side wall door frame that is the installation target, and the second protective material is connected and fixed to the first protective material while covering an area corresponding to the ceiling or floor door frame.

[0009] It is preferable that the first protective material is configured in the shape of an L or U to wrap around the side wall, the third connecting area is formed on both ends in the longitudinal direction of the second protective material, and the length of the second protective material is formed to be longer than the length of the ceiling or floor of the door frame, so that the third connecting area on both ends of the second protective material is folded at a right angle and contacts the first connecting area of ​​a pair of first protective materials installed on the side wall to connect and fix them.

[0010] It is preferable that the first to fourth bonding regions above be composed of a Velcro attachment structure.

[0011] The second and third coupling regions have a hook fastener structure, the first coupling region and the fourth coupling region have a loop fastener structure, and the Velcro attachment structure of the first coupling region and the second coupling region is formed in all or part of the first coupling region and the second coupling region.

[0012] It is preferable that a first button is installed in the first coupling area, a second button is installed in the second and third coupling areas to enable coupling between the protective materials through coupling with the first button, and a third button is installed in the fourth coupling area that can be coupled with the second button.

[0013] The above-mentioned second and third coupling regions of the protective materials are equipped with magnetic materials, and the above-mentioned first coupling region and the above-mentioned fourth coupling region are equipped with soft magnetic materials, thereby enabling magnetic coupling between the protective materials or between the protective materials and the fixing member.

[0014] The first coupling area is a main plate area excluding the wing area of ​​the first protective material, and the main plate area and the wing area are equipped with a metal wire or a metal plate, so that when the wing area is bent, it maintains a fixed shape without elasticity, thereby ensuring that when the main plate area is fixed to the installation target, the wing area maintains a fixed shape in a bent state. Effects of the invention

[0015] The protective material unit according to the present invention can provide strong fixing force without causing damage or contamination to the installation target, such as a door frame.

[0016] In addition, the protective material unit according to the present invention is easy to transport and store, and is effective in terms of convenience and stability during construction.

[0017] In addition, due to the shape of the joint area formed in the protective material unit according to the present invention, there is size adaptability according to the specifications of the installation target without a separate cutting process, flexibility according to site conditions, and increased ease of reuse.

[0018] In addition, while it was common practice to discard the protective material after construction in conventional protective material installations, the protective material unit of the present invention allows for the recycling of the protective material while only the fixing member is discarded after construction, thus offering the advantages of cost reduction and environmental friendliness.

[0019] In addition, installing metal wires or metal plates on the protective material maintains its shape while in contact with protrusions on the door frame, such as side walls, thereby improving protective performance. Brief explanation of the drawing

[0020] FIG. 1 is a drawing showing the construction of a protective material unit according to one embodiment of the present invention, illustrating the configuration of a first protective material, a second protective material, a fixing member, a main plate area, a wing area, and a coupling area. FIG. 2 is a drawing showing cross-sections of the first and second protective materials, illustrating the bonding area formed in each protective material. Figure 3 shows the adhesive area and the bonding area of ​​the fixed member. Figure 4 illustrates the type and structure of Velcro applied to the joint area. Figure 5 illustrates an example in which a button is applied as the material of the bonding area. Figure 6 illustrates an example in which a magnetic material is applied as the material of the bonding region. FIG. 7 is a partial drawing showing a structure in which the first reinforcing materials overlap each other and are connected and fixed, showing the combined structure of the first connecting area and the second connecting area. Figure 8 is a drawing to show the fixing structure of the main plate area and the wing area when metal wire and metal plate are applied to the protective material. Specific details for implementing the invention

[0021] Hereinafter, various embodiments and / or aspects are disclosed with reference to the drawings. For illustrative purposes, numerous specific details are disclosed in the following description to aid in a general understanding of one or more aspects. However, it will also be recognized by those skilled in the art that these aspects may be practiced without such specific details. The following description and the accompanying drawings describe specific exemplary aspects of one or more aspects in detail. However, these aspects are exemplary, and some of the various methods in the principles of the various aspects may be used, and the description is intended to include all such aspects and their equivalents.

[0022] As used herein, terms such as "examples," "examples," "aspects," "examples," etc., may not be interpreted as implying that any aspect or design described is better or more advantageous than other aspects or designs.

[0023] Additionally, the terms “comprising” and / or “comprising” should be understood to mean that the relevant feature and / or component is present, but not to exclude the presence or addition of one or more other features, components and / or groups thereof.

[0024] Additionally, terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but said components are not limited by said terms. Such terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component. The term "and / or" includes a combination of a plurality of related described items or any of a plurality of related described items.

[0025] Furthermore, in the embodiments of the present invention, all terms used herein, including technical or scientific terms, unless otherwise defined, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in the embodiments of the present invention.

[0026] FIG. 1 is a drawing showing a protective material unit constructed according to an embodiment of the present invention, illustrating the configuration of a first protective material (10), a second protective material (20), a fixing member (30), a main plate area (11) and a wing area (12) of the first protective material, and a main plate area (21) and a wing area (22) of the second protective material; FIG. 2 is a drawing showing a cross-section of the first protective material (10) and the second protective material (20), illustrating a bonding area formed on each first protective material (10), two end sides (23) of the second protective material (20), and a bonding area (24) formed thereon; FIG. 3 shows a bonding area (32) and an adhesive area (33) of the fixing member (30). FIG. 4 illustrates the type and form of Velcro applied to the bonding area applied to each protective material, FIG. 5 shows an example in which a button is applied as the material of the bonding area, and FIG. 6 shows an example in which a magnetic material is applied as the material of the bonding area. FIG. 7 illustrates a structure in which the first protective material (10) overlaps with one another and is interconnected and fixed, and FIG. 8 is a drawing to show the fixing structure of the main plate area (11) and the wing area (12) when a metal wire (15) and a metal plate (16) are applied to the first protective material (10).

[0027] Meanwhile, in the following description, some components described in the drawings may be omitted or excessively enlarged or reduced in order to explain the function of each component of the present invention; however, it will be understood that such illustrated components do not limit the technical features and scope of rights of the present invention. Furthermore, in the following description, multiple drawings will be referenced simultaneously to explain a single technical feature or a component constituting the invention.

[0028] According to one embodiment of the present invention, as shown in FIG. 1, it is composed of a first protective material (10) which is cut to a predetermined first unit length and first unit width and has a first bonding area (13) and a second bonding area (14) formed on each side, and a second protective material (20) which is cut to a predetermined second unit length and second unit width and has a third bonding area (24) formed on one side that is identical to the second bonding area (14).

[0029] Additionally, as shown in FIG. 3, one side has a fourth bonding area (32) formed therein that can be attached and fixed to the second bonding area (14), and the opposite side has an adhesive area (33) formed therein that can be fixed to the installation target of the first protective material (10), so that when the first protective material (10) is installed through the adhesive area (33) on the installation target, the first protective material (10) is attached to the fourth bonding area (32) and the first protective material (10) can be fixedly installed on the installation target.

[0030] Next, as illustrated in FIG. 7, the protective material unit according to one embodiment of the present invention is configured such that the first connecting area (13) and the second connecting area (14) can be attached and fixed to each other, so that a plurality of the first protective materials (10) can be connected and fixed to each other in the length or width direction, or the second protective material (20) can be connected and fixed to the first protective material (10), thereby providing size adaptability, convenience and stability during construction, as well as recyclability of the protective material, and together with this, minimizes damage to transported goods and is easy to install and remove.

[0031] In addition, the first protective material (10) is installed on the side wall door frame of the installation target, and the second protective material (20) is connected and fixed to the first protective material (10) while covering an area corresponding to the ceiling or floor door frame. By distinguishing the installation locations of each protective material in this way, the protective effect on the installation target can be maximized.

[0032] First, as shown in FIGS. 1 and 2, the first protective material (10) is configured in the shape of an L or U to wrap around the side wall and includes a main plate area (11) and a wing area (12).

[0033] Additionally, a third connecting area (24) is formed on both ends (23) in the longitudinal direction of the second protective material (20), and the length of the second protective material (20) is formed to be longer than the length of the ceiling or floor of the door frame, so that the third connecting area on both ends of the second protective material (20) is folded at a right angle and connected and fixed to the first connecting area (13) of a pair of first protective materials (10) installed on the side wall, and includes a main plate area (21) and a wing area (22) similar to the first protective material (10).

[0034] In one embodiment of the present invention, materials of the protective material constituting the protective material unit may include materials of the PE (polyethylene) foam series, compressed paper, and materials of the PP (polypropylene) plastic series, and the specific advantages of each material are as follows.

[0035] PE foam is a commonly available soft material with a sponge-like texture that offers excellent shock absorption, is easy to install, and can reduce costs.

[0036] Compressed paper, also known as hardboard or paper corner board, is a material made by highly compressing multiple layers of paper to make it as hard as wood. It is specialized for corner protection, and because it is made of paper, it is easy to dispose of and has a low unit cost.

[0037] PP plastics, commonly known as Flavenia, are a plastic corrugated material that is lightweight, thin, and can be easily cut with a knife, so they have the advantage of being able to be custom-wrapped even on non-standard door frames.

[0038] In addition, according to one embodiment of the present invention, it is preferable that the first to fourth bonding regions be composed of a Velcro attachment structure.

[0039] The above Velcro attachment structure allows for fine adjustment of the connection position, enabling the protective material to be freely connected and installed in the length and width directions, thereby providing size adaptability to accommodate changes in the specifications of the installation target.

[0040] In addition, due to the nature of Velcro, it is easy to attach and detach, offering the advantage of allowing installers to conveniently install and remove it without the need for separate tools. The Velcro material may consist of at least one of nylon, polyester, and polypropylene. The specific characteristics of each material are as follows.

[0041] Nylon is the most commonly used material due to its very strong bonding strength and softness, while polyester is suitable for outdoor sites as it has low moisture absorption, making it resistant to humidity and offering good UV resistance.

[0042] Polypropylene is a strong material with a plastic-like feel, so it has the advantage of being resistant to chemicals and having excellent support capabilities.

[0043] Next, as illustrated in Fig. 4, Velcro can be classified into standard Velcro and dual-lock Velcro. The standard type is the most commonly seen form and consists of hook fasteners and loop fasteners. Standard Velcro is suitable for mass protection work because it is inexpensive, comes in various sizes, and is economical. In addition, since it is made of a soft fiber material, it has the advantage of producing less noise during installation and further cushioning the impact when it comes into contact with the surface of the installation target or transported cargo.

[0044] Next, unlike standard Velcro, Dual-Lock Velcro features identical mushroom-shaped protrusions on both sides. Its fastening strength is more than five times greater than standard Velcro, making it advantageous for securing heavy plastic protective materials. It also ensures secure fastening with a distinct "click" sound upon connection. Furthermore, its self-connecting feature simplifies manufacturing and installation processes. Since it does not require pairing as is the case with standard Velcro, it eliminates material waste and offers the advantage of minimal performance degradation even with repeated use. Additionally, the ability to provide precise, wobble-free fastening prevents secondary damage that could occur due to the material shaking.

[0045] In addition, when fixing between the protective material and the fixing member (30) and Velcro, an acrylic or rubber-based adhesive material can be used to increase the adhesion performance and increase the durability of the protective material unit.

[0046] Meanwhile, when applying a standard type Velcro to the joint area, it is desirable to minimize damage that may occur during construction by having the second joint area (14) and the third joint area (24) have a hook fastener structure, and the first joint area (13) and the fourth joint area (32) have a loop fastener structure.

[0047] Additionally, the Velcro attachment structure of the first coupling area (13) and the second coupling area (14) is characterized by being formed in all or part of the first coupling area (13) and the second coupling area (14).

[0048] In addition, forming such a joint area minimizes damage during construction and allows for changes in position and size in at least one of the height or width directions of the installation target, thereby providing versatility for various specifications of the installation target and enabling excellent protection without requiring the installer's skill or delicate control.

[0049] Meanwhile, as described above, when a button is applied to the coupling area of ​​a protective material unit according to one embodiment of the present invention, it is preferable that a first button is installed in the first coupling area (13), a second button is installed in the second coupling area (14) and the third coupling area (24) to enable coupling between protective materials through coupling with the first button, and a third button is installed in the fourth coupling area (32) that can be coupled with the second button.

[0050] Next, as illustrated in Fig. 5, a unidirectional snap button is suitable as the type of button to use.

[0051] In this case, unidirectional snap buttons enable non-destructive fastening, stable support for vertical loads, and allow for a clean finish. Major materials that can be used include polycarbonate, ABS, and high-elasticity polyacetal; polycarbonate possesses ultra-high strength, impact resistance, dimensional stability, and excellent adhesion. When using ABS, it is easy to process, offers a harmonious balance of stiffness and toughness, facilitates painting and post-processing, and is cost-competitive. High-elasticity polyacetal has excellent elastic recovery and lubricity, resulting in less wear due to friction, thus minimizing dust generation and ensuring good durability. Additionally, it offers chemical and fatigue resistance, making it resistant to fatigue failure that may occur in the field.

[0052] Meanwhile, when forming a coupling area with a button, it is preferable to place a cap structure in the first coupling area (13) and the fourth coupling area (32) and a socket structure in the second coupling area (14) and the third coupling area (24) to minimize damage that may occur during construction and to enable mutual attachment and fixation of the first coupling area (13) and the third coupling area (24).

[0053] Next, according to one embodiment of the present invention, a magnetic material can be applied to the protective material bonding area.

[0054] As shown in FIG. 6, a magnetic material is installed in the second bonding area (14) and the third bonding area (24) of the protective material, and a soft magnetic material is installed in the first bonding area (13) and the fourth bonding area (32), so that magnetic bonding can be made between the protective materials or between the protective material and the fixing member (30).

[0055] At this time, the magnetic material may be composed of at least one of neodymium, rubber magnet, ferrite, and a ferromagnetic metal plate. The specific characteristics of each material are as follows.

[0056] Neodymium is a permanent magnet with the strongest magnetic force, capable of achieving powerful fixing power even in a compact size. It is suitable for fixing heavy loads while reducing volume, as it penetrates plates and exerts strong bonding force even when embedded inside protective materials.

[0057] In the case of rubber magnets, they are a material that maximizes flexibility by mixing ferrite powder with polymer resin, allowing them to be attached along the curved surfaces of door frames or columns rather than straight lines, enabling tight sealing on a surface-by-surface basis.

[0058] In addition, ferromagnetic metal plates such as stainless steel 430, although they are soft magnetic materials that do not possess magnetic force on their own, are iron-containing materials that react strongly to magnets and can be used as a corresponding material for magnets, which can lower the unit cost of the entire system and can be manufactured in the form of thin sheets, thereby reducing weight even when embedded inside protective materials.

[0059] As described above, when a magnetic material is used as the material for the bonding area, a protective unit can be constructed by embedding the magnetic material in the protective material and the fixing member, thereby enabling the realization of a smooth surface and a superior appearance, which has the effect of minimizing damage to cargo being transported naturally. In addition, in the case of magnetic bonding, the bonding performance does not deteriorate even with repeated use, and there is an advantage that a separate fixing member (30) is not required when the installation target is a magnetic material, and the installation and removal of the protective material can be carried out more quickly.

[0060] Meanwhile, as described above, in addition to Velcro, buttons and magnetic materials may be applied as the material of the bonding area formed in the protective material unit of the present invention, and the bonding area will be composed of at least one of these, and the present invention is not limited thereto.

[0061] Returning to Fig. 2 to continue the explanation, each protective material of the protective material unit of the present invention can be divided into a main plate area and a wing area.

[0062] Additionally, the first bonding area (13) is the main plate area (11) excluding the wing area (12) of the first reinforcing material (10), and the main plate area (11) and the wing area (12) may be made of a metal wire (15) or a metal plate (16).

[0063] In addition, when the wing area (12) is bent, it maintains a fixed shape without elasticity, so that when the main plate area (11) is fixed to the installation target, the wing area (12) maintains a fixed shape in a bent state, allowing it to be stably protected in a close contact state.

[0064] Meanwhile, as illustrated in FIG. 8, the metal wire (15) described above is installed in a linear form inside the protective material and has the function of helping to form a flexible bend, and soft aluminum, annealed wrought iron, and soft copper can be used as the material. The specific advantages of each material are as follows.

[0065] Soft aluminum is lightweight, so it does not increase the overall load of the protective material; it offers low resistance when shaped by hand and has almost no rebound elasticity, allowing it to adhere perfectly to shapes such as the edges of thin door frames, while also possessing excellent corrosion resistance. Annealed wrought iron, on the other hand, is a material in which elasticity has been removed through heat treatment; it is economical due to its low cost and has higher strength than aluminum, meaning that once a curved shape is formed, it maintains its form more firmly even against external impacts.

[0066] In addition, soft copper has the advantage of being able to accommodate very complex curved shapes due to its excellent malleability and elongation properties.

[0067] Likewise, referring to FIG. 8, the metal plate (16) is installed in the form of a thin film on the protective material to help maintain the shape on a surface basis, and can be made of materials such as aluminum foil, soft stainless steel foil, and galvanized steel sheet.

[0068] The advantages of each material are as follows. Aluminum foil is advantageous when maintaining its shape on a surface basis, and can be inserted to wrap around the entire wing area, thereby forming a structure where the entire wing area (12) wraps around the door frame rather than a specific point, and it has the advantage of not rusting in humid environments.

[0069] Next, soft stainless steel sheets have excellent corrosion resistance and good ductility, which allows them to be easily formed by hand to fit curves or edges. Galvanized steel sheets, on the other hand, are materials coated with zinc on the surface of steel plates and possess superior strength, characterized by their ability to provide strong support to prevent the wing shape from collapsing in locations prone to being stepped on, such as floor door frame guards.

[0070] According to one embodiment of the present invention, the first protective material (10) has a length of 500 to 1,200 mm and a width of 400 to 900 mm, and the second protective material (20) has a length of 700 to 2,000 mm, with both end sides (23) occupying 150 to 500 mm of the total length and configured in a rectangular shape with a width of 400 to 900 mm, and the fixing member (30) is preferably formed with a width of 100 to 200 mm and a length of 100 to 300 mm. In addition, the wing area has a width less than or equal to the width of the main plate area, so that it can adhere to the corners of door frames of various thicknesses and achieve excellent protective properties.

[0071] Ultimately, through each of the embodiments and variations described above, the present invention maximizes the effect of reducing costs and resource waste by providing not only a function to prevent damage such as scratches, dents, and scratches that occur on door frames during construction, but also convenience and stability during construction, as well as size adaptability and recyclability that can accommodate door frames of various sizes.

[0072] In addition, by distinguishing the main plate area and the wing area of ​​the protective material and utilizing the joining areas formed on both ends, it is possible to provide a simple protective material unit that allows the protective material to be installed in accordance with the shape and specifications of the door frame.

[0073] Furthermore, due to the characteristics of the protective material unit according to the embodiment of the present invention, it has the advantage of being simpler and more convenient than conventional protective material units in terms of storage, transportation, installation, and removal processes.

[0074] Thus, the present invention can provide a protective material unit that allows for simple handling and convenient construction of the protective material for protecting the inner wall of a door frame, as well as more secure fixation through a fixing member (30), and provides recyclability and maximizes protective properties.

[0075] Although the embodiments have been described above with reference to limited embodiments and drawings, those skilled in the art will understand that various modifications and variations are possible from the description above. Terms such as "include," "compose," or "have" as described above imply that components may be inherent unless specifically stated otherwise; therefore, they should be interpreted as allowing for the inclusion of additional components rather than excluding other components. Furthermore, the scope of protection of the present invention shall be interpreted by the claims below, and all technical concepts within an equivalent scope shall be interpreted as being included within the scope of rights of the present invention.

Claims

Claim 1 A first protective material configured by being cut to a predetermined first unit length and first unit width, with a first bonding area and a second bonding area formed on each side; a second protective material configured by being cut to a predetermined second unit length and second unit width, with a third bonding area identical to the second bonding area formed on one side; and a fixing member having a fourth bonding area formed on one side that can be attached and fixed to the second bonding area, and an adhesive area formed on the opposite side that can be fixed to an installation target of the first protective material, so that when installed on an installation target through the adhesive area, the first protective material is attached to the fourth bonding area and the first protective material is fixedly installed on the installation target.It includes, wherein the first connecting area and the second connecting area are configured in a structure capable of being attached and fixed to each other, so that a plurality of the first protective materials can be connected and fixed to each other in the length or width direction, or so that the second protective material is connected and fixed to the first protective material, wherein the first protective material is installed on the door frame on the side wall side that is the installation target, and the second protective material is connected and fixed to the first protective material while covering an area corresponding to the ceiling or floor door frame, and the first protective material is configured in an L-shape or U-shape to wrap around the side wall, and the third connecting area is formed on both ends in the length direction of the second protective material, and the length of the second protective material is formed to be longer than the length of the ceiling or floor of the door frame, so that the third connecting areas on both ends of the second protective material are folded at a right angle and are connected and fixed by contacting the first connecting area of ​​a pair of first protective materials installed on the side wall, and the first to fourth connecting areas are configured in a Velcro attachment structure, and the second connecting A protective material unit having size adaptability and recyclability, characterized in that the area and the third connecting area have a hook fastener structure, the first connecting area and the fourth connecting area have a loop fastener structure, the Velcro attachment structure of the first connecting area and the second connecting area is formed in all or part of the first connecting area and the second connecting area, the first connecting area is a main plate area excluding the wing area of ​​the first protective material, and a metal wire or metal plate is installed in the main plate area and the wing area, so that when the wing area is bent, it maintains a fixed shape without elasticity, thereby ensuring that when the main plate area is fixed to the installation target, the wing area maintains a fixed shape in a bent state. Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 delete Claim 6 delete Claim 7 delete Claim 8 delete Claim 9 delete

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