Protective materials and methods

Abstract

To provide a protective material (a curing material) allowing both a high attachment performance and a gripping force to a protected material, and a method for protecting the protected material using this protective material.SOLUTION: A protective material 1 comprises a pair of leg parts 5 extending from a pair of free or opened ends 2 forming an insertion part 1h into which a protected material P can be inserted, and capable of being extended and opened, a first bent part (a first fulcrum part) 7 bent or curved and projected or expanded from the pair of leg parts to a laterally outward direction, a pair of arm parts 8 extending from the first bent part and capable of being extended and opened and a second bent part (a second fulcrum part) 10 extending from the arm part to joint together. The protective material 1 may have a frame-like form having a substantially square or rhombus cross section in which one corner part corresponding to the free or opened ends 2 can be opened.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a protective material (curing material) useful for protecting materials to be protected, such as building materials, furniture, and home appliances, and a protection method using the same. [Background technology]

[0002] Protective materials such as masking sheets or plastic cardboard are used to prevent damage and breakage of materials to be protected, such as building materials, furniture, and / or home appliances. For example, protective materials are often attached or fixed to the materials to be protected using masking tape (adhesive tape) to protect building materials such as doors installed at the entrances and exits of buildings when items are brought in and out. However, the installation work of protective materials using masking tape is complicated, which reduces the efficiency of the installation work. Furthermore, during demolition, the adhesive of the adhesive tape may adhere to the protected material, or the surface of the protected material may peel off.

[0003] For this reason, protective materials that can be easily attached to the protected material are being considered. For example, Patent Document 1 (JP Patent Publication No. 2016-27235A) describes a protective material made of foamed resin that faces an opening for mounting the protected material and has a front protective part for protecting the front surface of the protected material, curved parts that curve from both ends of the front protective part toward the sides, extension parts that extend from the curved parts in a direction approaching each other and are separated from each other to form the opening, and a clamping part that is bent inward at a predetermined angle with respect to the extension parts, and that has an action part where a tightening force acts on the protected material.

[0004] Also, Patent Document 2 (JP Patent Publication 11-152904A) describes a protective material that has a roughly triangular frame-like cross section, with each corner forming a convex portion curved in an arc, each side recessed inward to form a concave portion curved in an arc, and with an opening at the center of the base. It is described that this protective material is designed to spread out both ends of the opening to clamp the side of the pillar. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2016-27235 A [Patent Document 2] Japanese Patent Application Publication No. 11-152904 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the protective material described in Patent Document 1 applies a clamping force (gripping force) to a protected material such as a pillar with a clamping portion bent inward at a predetermined angle relative to the extending portion, so that the clamping portion must be opened with a relatively large force in order to attach it to the protected material. Therefore, the workability of attaching it to the protected material is likely to decrease. In addition, since the clamping force of the clamping portion is applied to both side walls of the protected material, the protected material cannot be protected over a wide area. Furthermore, since the extending portion has a shape facing the front protection portion, when the protective material of Patent Document 1 is attached to a protected material of a predetermined thickness, for example, a relatively thin protected material such as a door, a part of the protective material (such as a curved portion) may protrude from the protected material in a lateral direction, which may hinder the loading and unloading work.

[0007] In addition, the protective material of Patent Document 2 also requires a relatively large force to open because the open ends face each other at the bottom, which reduces the ease of attachment to the protected material. In addition, the open ends hold both side walls of the protected material, so the protected material cannot be protected over a wide area.

[0008] Therefore, an object of the present disclosure is to provide a protective material (curing material) that can effectively protect or cure a material to be protected. Another object of the present disclosure is to provide a protective material (protection material) that can achieve both high attachment ability and gripping force (clamping force) on a protected material.

[0009] Still another object of the present disclosure is to provide a protective material (curing material) that can be easily attached to a material to be protected and that does not interfere with loading and unloading operations. [Means for solving the problem]

[0010] As a result of intensive research into achieving the above-mentioned object, the inventors have discovered a protective material made of a resin foam having a roughly square or diamond-shaped cross-section with one corner that can be opened, and in particular, by forming the other multiple corners into a specified shape that is rounded, it is possible to improve the ease of attachment to the protected material and also improve the gripping force (clamping force), protect a wide area of ​​the protected material, be easily attached to the protected material, and prevent it from interfering with the loading and unloading operations, and have completed the present invention.

[0011] That is, the protective material (or curing material) of the present disclosure is formed of a resin foam (foamed resin or foamable resin composition) and is used to protect a material to be protected. This protective material (curing material) comprises a pair of expandable legs extending from a pair of free ends (openings or introduction parts), a first bent part (first fulcrum part or inflection part) that bends or curves outwardly to the sides and protrudes or bulges from the pair of legs, a pair of expandable arms extending from the first bent part, and a second bent part (second fulcrum part or inflection part) that extends from the arm parts and merges with them.

[0012] In other words, the protective material (curing material) may comprise: a second bent portion (second fulcrum portion or inflection portion) positioned opposite the free ends of the pair of legs and protruding or bulging outwardly opposite the free ends of the pair of legs, and bending or curving; a pair of arm portions (arm portions that can expand or rotate around the second bent portion as a fulcrum) extending from this second bent portion; a first bent portion (first fulcrum portion or inflection portion) protruding or bulging outwardly from the arm portions, and bending or curving; and a pair of legs extending from this first bent portion to reach the pair of free ends and that can be expanded.

[0013] The pair of free ends may be separated from each other (open) or may be in contact with each other. The pair of free ends of the protective material (curing material) may form an insertion port (opening or openable introduction part) into which the protected material can be inserted or attached, or an introduction part (insertion part) into which the protected material can be inserted or introduced between adjacent protected materials. The protective material may also protect or cure the protected material by containing at least a part of the protected material or being interposed between the protected materials.

[0014] That is, the protective material (curing material) may include an introduction portion (opening or insertion port) for forming an opening through which the protected material can be attached and detached (inserted or inserted) or an introduction portion (insertion portion) that can be inserted between adjacent protected materials, the second bent portion (a second bent portion that faces the introduction portion and bends or curves in a form that protrudes or bulges outward from the introduction portion (a form that protrudes or bulges in a direction from a direction away from the introduction portion to a direction toward the introduction portion)) located opposite the introduction portion, the pair of arms extending from the second bent portion, a first bent portion formed by extending from the arm portions, and a pair of legs extending from the first bent portion. Note that the pair of legs, the first bent portion, and the arm portions may form a movable portion that can be expanded or rotated with the second bent portion as a fulcrum, and the movable portion and the second bent portion may form a protective portion for forming a protective space that accommodates at least a part of the protected material. That is, the protective portion for forming a protective space capable of accommodating at least a portion of the protected material may have a movable portion (arm portion, first bent portion, leg portion) that can expand or rotate with the second bent portion as a fulcrum.

[0015] The pair of legs may extend from a pair of free ends (free ends forming the insertion opening or the insertion portion) in a direction away from each other (in a direction of spreading) to a first bent portion. In other words, the pair of legs may extend from the first bent portion in a direction approaching each other to the pair of free ends to form the introduction portion (insertion opening or the insertion portion). The pair of legs may be formed in a linear shape or in a curved shape that bulges outwardly to the side. The first bent portion may include a curved wall that extends in an arc-shaped curve from the pair of legs and the pair of arms in a direction approaching each other, and a bent top wall that extends from the curved wall and bends or curves to join.

[0016] The pair of arms may extend from the first bent portion in a direction approaching each other (narrowing direction) to the second bent portion. In other words, the pair of arms may extend from the second bent portion in a direction away from each other (widening direction). The second bent portion may be located opposite to the free ends of the pair of legs (an insertion opening into which the protected material can be inserted, or an insertion portion that can be inserted between the protected materials) and may be bent or curved by protruding or bulging outwardly opposite the free ends of the pair of legs (the insertion opening or the insertion portion).

[0017] More specifically, the protective material (or curing material) may have a shape that is roughly a square frame or a diamond frame in cross section, and may have a shape in which one corner portion (first corner portion) is openable (a shape in which the introduction portion (insertion port or insertion portion) can be formed). Both sides of the openable corner portion (first corner portion) may form a pair of legs (or clamping portions) that can be spread open. In a preferred embodiment, the protective material has a shape (roughly a diamond frame in cross section) in which the distance between a pair of free ends of the legs that form the insertion port or insertion portion and the second bend portion is greater than the distance between the first bend portions. In a protective material of this shape, one corner portion with a small internal angle may be openable (capable of opening to form the insertion port (or introduction portion) or capable of forming the insertion portion without opening). Furthermore, two corners (corners with a larger internal angle in a diamond-shaped cross-section) adjacent to an openable corner (first corner) may form a first bent portion, and this first bent portion may have a bent or curved form that protrudes or bulges outwardly to the side. Furthermore, a corner (corner with a smaller internal angle in a diamond-shaped cross-section) located opposite the openable corner (first corner) may form a second bent portion, and this second bent portion may have a form that protrudes outwardly by bending or curving. A protective material having such first and second bent portions may form a protective space that has a diamond-shaped cross-section, a shuriken-shaped cross-section, or the like.

[0018] Furthermore, protruding or bulging convex portions may be formed on the inside and / or outside of the pair of free ends (the insertion openings or the insertion portions) of the leg portions.

[0019] The resin foam may be formed of a closed-cell foam containing at least an olefin-based resin.

[0020] The present disclosure also includes a method of protecting a protected material by attaching the protected material to the protective material through a pair of free ends (insertion ports) of the protective material; and a method of protecting the protected material by interposing at least a portion of the protective material between the protected materials.

[0021] In addition, when a virtual line connecting the pair of free ends (insertion openings (openings or introduction parts) or insertion parts) and the second bent parts (a virtual line connecting the openable corner part (first corner part) and a corner part facing the open corner part in a shape of a roughly rectangular or rhombic frame in cross section) is used as a reference, the protective material may have a symmetrical shape with the virtual line as a center (for example, a shape that is line-symmetrical with the virtual line as an axis of symmetry). The pair of legs may be inclined in a direction approaching (narrowing) the virtual line as they move away from the second bent part (as they move from the second bent part toward the opening part). The first bent part may have a shape that protrudes or bulges in a direction intersecting (or perpendicular to) the virtual line (a shape that is bent or curved from a direction moving away to a direction moving toward the virtual line). In addition, the arm part may be inclined in a direction moving away from (widening) the virtual line as it moves away from the second bent part (as it moves from the second bent part toward the opening part). The second bent portion may have a bent or curved form that protrudes or bulges in the direction (outward) of the imaginary line extending from the pair of free ends (insertion port or insertion portion) (from a direction moving away from the imaginary line to a direction moving closer to the imaginary line). Effect of the Invention

[0022] In the present disclosure, by attaching the material to be protected through the opening of the protective material (curing material), it is possible to achieve both high attachment property and gripping force (clamping force) on the material to be protected by utilizing the first and second bent portions. In addition, since the protective material (curing material) can be attached to the material to be protected by opening and closing the opening, it can be easily attached to the material to be protected and gripped without using adhesive tape. Furthermore, by forming the protective material into a diamond-shaped cross section, it is possible to prevent the protective material from protruding from the material to be protected, improving the ease of loading and unloading. Furthermore, it is possible to protect a wide area of ​​the material to be protected, while reducing the volume, thereby reducing transportation and storage costs. In an embodiment in which a protective material is interposed between protected materials, the repulsive forces of the leg portion, first bent portion, arm portion and second bent portion can be utilized to stably hold the protective material between adjacent protected materials such as plate-like members, thereby preventing damage to the protected materials. [Brief description of the drawings]

[0023] [Figure 1] FIG. 1 is a diagram showing an example of a state in which a protective material according to a first embodiment of the present disclosure is used. [Diagram 2] FIG. 2(a) is a perspective view showing a portion of the protective material according to the first embodiment of the present disclosure, and FIG. 2(b) is a plan view showing the protective material according to the first embodiment of the present disclosure. [Diagram 3] FIG. 3(a) is an enlarged view showing an arm portion, a first bent portion and their vicinity according to the first embodiment of the present disclosure, and FIG. 3(b) is an enlarged view showing a leg portion and their vicinity according to the first embodiment of the present disclosure. [Figure 4] 4(a) and (b) are diagrams for explaining a method of attaching the protective material to a protected material according to the first embodiment of the present disclosure. [Diagram 5] 5(a) and (b) are diagrams showing a state in which the protective material according to the first embodiment of the present disclosure is attached to a protected material. [Figure 6] FIG. 6(a) is a plan view showing a first modified example of the protective material according to the first embodiment of the present disclosure, and FIG. 6(b) is a plan view showing a second modified example of the protective material according to the first embodiment of the present disclosure. [Figure 7] FIG. 7(a) is a plan view showing the configuration of a protective material according to a second embodiment of the present disclosure, and FIG. 7(b) is a plan view showing a modified example of the protective material according to the second embodiment of the present disclosure. [Figure 8] FIG. 8(a) is a plan view showing the configuration of a protective material according to a third embodiment of the present disclosure, and FIG. 8(b) is a plan view showing a modified example of the protective material according to the third embodiment of the present disclosure. [Figure 9] FIG. 9 is a plan view showing a protective material according to still another embodiment of the present disclosure. [Figure 10] 10(a) and (b) are diagrams for explaining a retention force measurement test according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] A protective material and a protective method according to an embodiment of the present disclosure will be described below with reference to the accompanying drawings. In the following, the same members or elements (or members or elements having similar functions) will be described with the same reference numerals. In addition, unless otherwise specified, the form of the protective material will be described based on a form in which, in a released or natural state (a state in which it is not attached to a protected material), the free end (the insertion port (opening) or insertion portion for the protected material) is positioned downward and the second bent portion is positioned upward. In addition, the terms "approximately" and "schematically" also include descriptions that are not modified by "approximately" and "schematically", for example, "approximately orthogonal" includes both "orthogonal" and "approximately orthogonal", and "approximately rectangular cross-sectional frame" is used to mean both "rectangular cross-sectional frame" and "deformed rectangular cross-sectional frame".

[0025] [Protective material (curing material)] [First embodiment] In the first embodiment, FIG. 1 shows an example of a state in which protective material 1 is used, FIG. 2(a) is an oblique view showing a portion of protective material 1 relating to the first embodiment, FIG. 2(b) is a plan view showing protective material 1, FIG. 3(a) is an enlarged view showing arm portion 8, first bend portion 7 and their vicinity, and FIG. 3(b) is an enlarged view showing leg portion 5 and their vicinity.

[0026] This protective material 1 is made of a resin foam (foamed resin, foamable resin composition) to enhance cushioning (shock absorbing ability) and shape recovery, and can be used to protect a material P to be protected, such as a building material, furniture, and / or household electrical appliances. In this example, a door, which is the material P to be protected, is protected by the long, tubular protective material 1.

[0027] The protective material 1 has a cross-sectional shape of a generally rhombic frame with one corner that can be opened or closed, and is equipped with an introduction section (insertion section or opening / closing section) 2 for forming an insertion port (opening) 1h through which the protected material P can be inserted, and a protective section 3 for forming a protected space S capable of accommodating at least a portion of the protected material P (a protected area or protected area R that is covered and protected by the protective material 1). The protected space S forms a space with a cross-sectional shape of a generally rhombic frame with both side sections and upper and lower sections protruding outward and upward, for example, a cross-sectional shape that is generally shuriken shaped (see FIG. 2(b)).

[0028] More specifically, the protective portion 3 includes a pair of legs 5, a first bent portion 7, a pair of arms 8, and a second bent portion 10, and forms a protective space S. That is, the protective material 1 comprises a pair of legs 5 which extend at an incline in a substantially linear manner from a pair of free ends (opening ends or introduction parts) 2 which form the insertion port (opening) 1h in directions away from each other (expanding directions) and which are expandable; a first bend (first fulcrum or inflection part) 7 which bends or curves in a V-shaped or U-shaped cross section from the pair of legs and protrudes or bulges outward to the side; a pair of arms 8 which extend at an incline in a substantially linear manner from the first bend in directions approaching each other (converging or narrowing directions) and which are expandable; and a second bend (second fulcrum or inflection part) 10 which extends from the arm parts in a converging direction and joins with each other; and the second bend (second fulcrum or inflection part) 10 is bent or curved in a V-shaped or U-shaped cross section and protrudes or bulges outwardly opposite the insertion port (opening) 1h or the pair of free or open ends 2.

[0029] The pair of legs 5, the first bent portion 7, and the arm portion 8 form a movable portion 4 that can be opened or rotated around the second bent portion 10 as a fulcrum. The pair of legs 5 can be opened or rotated around the first bent portion 7 as a fulcrum (and also around the second bent portion 10 as a fulcrum), and the arm portion 8 can be opened or rotated around the second bent portion 10 as a fulcrum.

[0030] The first bend portion (first fulcrum portion or inflection portion) 7 is located on both sides of the protective material 1 facing each other, and the second bend portion (second fulcrum portion or inflection portion) 10 is located at the top of the protective material 1 facing an insertion opening (opening portion or introduction portion) 1h through which the protected material P can be inserted.

[0031] Furthermore, the protective portion 3 and the protective material 1 are formed in a roughly symmetrical shape, and the protective portion 3 and the protective material 1 are formed in such a way that the distance between a pair of free ends (opening ends, introduction portions) 2 of the legs 5 forming the insertion opening 1h and the second bend portion 10 is greater (i.e., elongated) than the distance between the first bend portions 7 located on both sides and facing each other, corresponding to the protective space S, and are formed in a roughly diamond-shaped frame-like cross section.

[0032] In such a protective material 1, the line connecting the pair of free ends (open ends, introduction parts) 2 of the leg parts 5 and the second bent parts 10 may be described as "virtual line X"; the side of the protective material 1 closer to the virtual line X may be described as "inside" and the opposite side may be described as "outside". In addition, the length of the protective material 1 in the longitudinal direction (axial direction) may be simply described as "length L", the length of the protective material 1 in the direction parallel to the virtual line X, i.e., the distance between the free or open ends (introduction parts) 2 of the leg parts 5 and the second bent parts 10 may be simply described as "height H" or "depth H" or "depth H", and the distance between the two first bent parts 7 may be simply described as "width W" or "projecting width W". Furthermore, the line extending from the center of the length of the "width W" or "projecting width W" of the protective material 1 along the height (depth or depth) H direction may be simply referred to as the "center line".

[0033] The protective material 1 is formed in a generally rhombic cross section with a width (protruding width) W smaller than its height (depth or depth) H, and the cross sections of the protective material 1 and the movable part 4 are generally linearly symmetrical with respect to the imaginary line X as the axis of symmetry (i.e., a symmetrical shape in which the imaginary line X and the center line approximately coincide), and the central part in the height (depth) H direction (the part corresponding to the first bent part 7) has a linear shape that protrudes or bulges outward (to the outside of the side) and is bent or curved. In other words, the pair of arm parts 8 and the pair of leg parts 5 are formed to be approximately the same length.

[0034] As shown in Figures 2(b) and 3(b), the legs 5 face each other on either side of the imaginary line X; as they extend from the first bend 7 toward the insertion port (opening) 1h or a pair of free ends [introduction portion (insertion portion or opening / closing portion)] 2, they incline toward the imaginary line X (narrowing inward), and extend in a linear shape (approximately straight line); and form an inclined wall having an inclined inner wall 5a that constitutes the protective space S (see Figure 3(b)).

[0035] Furthermore, as shown in FIG. 3(b), a pair of free ends or tip ends (opening ends or introduction portions) 2 of the legs 5 that form the insertion port (opening) 1h are formed with a convex portion (fastening portion) 6 that bulges outward in an arc shape to the side, forming a free end [introduction portion (opening end or opening / closing portion)] 2 that can form the insertion port (opening) 1h between the opposing convex portions (fastening portions) 6 across the imaginary line X (or center line).

[0036] The free or open ends (introduction portions) 2 of the legs 5 form an introduction surface (opening / closing surface) 1S including the tips of the pair of legs 5 (tips of the convex portions 6), and the imaginary line X is approximately perpendicular to the introduction surface 1S and passes through approximately the midpoint of the line segment connecting the tips of the pair of legs 5 (tips of the convex portions 6).

[0037] The first bent portions 7 are positioned opposite each other across the imaginary line X (or center line), and each first bent portion 7 is formed by being bent or curved so as to protrude or bulge outwardly (in an outward direction) substantially perpendicular to the imaginary line X, and each first bent portion 7 has an apex or peak 7t (the portion furthest from the imaginary line X). That is, the first bent portion 7 is formed by being bent or curved in a direction approaching the imaginary line X (inward) as it moves from the apex 7t toward the free end portion [introduction portion (opening end portion)] 2 or the second bent portion 10.

[0038] The first bent portion 7 includes curved walls 7a, 7b that extend in an arc-shaped curve in the lateral outward direction as the pair of legs 5 and the pair of arms 8 approach each other, and a bent top wall 7c that projects from the curved walls in a V-shaped or U-shaped cross section and bends or curves to join. More specifically, the first bent portion 7 includes a first curved wall 7a that extends in an arc-shaped curve in the lateral outward direction (outward direction) as it moves from the arm portion 8 to the leg portion 5, a second curved wall 7b that extends in an arc-shaped curve in the lateral outward direction (outward direction) as it moves from the leg portion 5 to the arm portion 8, and a bent top wall 7c that extends in the lateral outward direction (outward direction) from the first curved wall 7a and the second curved wall 7b and joins. That is, the first curved wall 7a and the second curved wall 7b face each other in a direction perpendicular to the imaginary line X (or the center line), approach each other as they move toward the outside (lateral side), and join at the curved top wall 7c.

[0039] In this example, an inclined wall is interposed between curved walls 7a, 7b and a bent top wall 7c. That is, the inner wall (inside) of the first curved wall 7a located on the second bent portion 10 side has a first curved inner wall 7d that curves in an approximately arc shape in a direction away from the imaginary line X as it goes from the second bent portion 10 toward the leg 5, and a first inclined wall (first inclined inner wall 7g) extending from this curved inner wall 7d and inclining in a direction away from the imaginary line X as it goes from the second bent portion 10 toward the leg 5; the inner wall (inside) of the second curved wall 7b located on the leg 5 side has a second curved inner wall 7e that curves in an approximately arc shape in a direction approaching the imaginary line X as it goes from the second bent portion 10 toward the leg 5, and a second inclined wall (second inclined inner wall 7h) extending from this curved inner wall 7e and inclining in a direction approaching the imaginary line X as it goes from the second bent portion 10 toward the leg 5. That is, the first curved inner wall 7d and the second curved inner wall 7e face each other in a direction perpendicular to the imaginary line X (or center line), and the first curved inner wall 7d and the second curved inner wall 7e are curved outward (toward the outside) as they approach each other, moving away from the imaginary line X. In this example, the first curved inner wall 7d and the second curved inner wall 7e are formed to have approximately the same radius of curvature, for example, a radius of about 8 to 12 mm.

[0040] The curved top wall 7c is formed to protrude or bulge outward from the curved walls 7a, 7b and curved in an arc shape, and the inner wall of the curved top wall 7c has a third curved inner wall 7f.

[0041] A pair of arm portions 8 extending in a substantially straight line face each other across the imaginary line X (or center line) and extend at an incline outward (widening direction) away from the imaginary line X as they extend from the second bend portion 10 toward the leg portion 5, and the arm portions 8 have arm inclined walls (arm inclined inner walls 8a).

[0042] Furthermore, the second bent portion 10 of the protective portion 3 is formed by a pair of arm portions 8 inclined in an approximately linear manner joining together and being bent or curved in a manner that protrudes or bulges outwardly opposite the insertion opening 1h.

[0043] The first curved inner wall 7d, the first inclined inner wall 7g, the second curved inner wall 7e, the second inclined inner wall 7h, the third curved inner wall 7f, and the arm inclined inner wall 8a form a part of the inner wall of the protection space S.

[0044] [How to wear or protect] A method of mounting or attaching the protective material 1 to a protected material P and a protection method according to the first embodiment will be described with reference to Figs. 4(a) and 4(b).

[0045] As shown in FIG. 4(a), the free or open end (introduction portion) 2 of the pair of legs 5 of the protective material 1 is opened (spread), and the protected material P is inserted or introduced into the protected space S from the insertion port (opening) 1h along the arrow D. At that time, the protective material 1 may be moved to a predetermined position in the protected space S according to the type of the protected material P. In the example shown in FIG. 4(b), the tip (or corner) of the protected material P is inserted to a predetermined position where it contacts the first curved wall 7a (the first curved inner wall 7d and / or the first inclined inner wall 7g). Then, when the pair of legs 5 of the expanded protective material 1 are released, the shape restoring force of the protective material 1 and the movable part 4 can apply a clamping force (holding or clamping force) to the protected material P while wrapping the end of the protected material P, and the protective material 1 can be attached or attached to the protected material P in a freely detachable manner in the clamped or gripped state. Therefore, the protective material 1 can be attached to the protected material P by a simple operation of spreading and releasing the pair of legs 5 (one-touch type). In addition, the protective material 1 can effectively protect the protected material P by utilizing the cushioning properties of the resin foam.

[0046] In other words, since the multiple bent portions (first bent portion 7 and second bent portion 10) are formed as rounded portions, the clamping force at each bent portion can be accumulated to improve the clamping force (clamping force) at the free end or opening end (introduction portion) 2.

[0047] Specifically, the pair of legs 5 can be opened or rotated around at least the first bent portion 7 as a fulcrum, and the movable portion 4 (the pair of legs 5, the first bent portion 7, and the arm portion 8, particularly the arm portion 8) can be opened or rotated around the second bent portion 10 as a fulcrum. The pair of legs 5 and the arm portion 8 can also be opened or rotated around the first bent portion 7 as a fulcrum. Furthermore, the resin foam forming the protective material 1 also has a bending or restoring force. Therefore, when the protected material P is gripped or clamped, the clamping force (repulsion force) can be improved by the multiple bent portions (the first bent portion 7 and the second bent portion 10) formed in an arc shape, and a tightening force can be applied to the protected material P by the pair of legs 5 and the arm portion 8. For example, the pair of legs 5 spread out using at least the first bent portion 7 (and further the second bent portion 10) as a fulcrum, so that when the spread free end or open end 2 is released, the tightening force (force (shape restoring force) toward the imaginary line X (or center line)) by the legs 5 can be increased. This can further improve the clamping or squeezing pressure of the protective material 1. Therefore, the protective material 1 can be clamped or squeezing the material P to be protected, and the protective material 1 can be attached or attached to the material P to be protected more stably. Furthermore, the protective material 1 can be stably held to the material P to be protected without using adhesive tape.

[0048] In particular, the cross section of the protective material 1 is roughly a diamond-shaped frame with one corner portion with a small internal angle forming a free end or opening end 2, and the corner portion (first bent portion 7) adjacent to the openable corner portion protrudes outward to the side in a V-shaped or U-shaped cross section (the first inclined inner wall 7g and the second inclined inner wall 7h approach each other in a direction that approaches each other as they proceed outward to the side perpendicular to the imaginary line X to form the roughly V-shaped first bent portion 7). Therefore, various shapes of protected materials P can be effectively gripped or clamped to protect them with the protective material 1.

[0049] More specifically, the pair of legs 5 are inclined in a direction approaching the free or open end 2 from the first bent portion 7 (inclined in a direction approaching the imaginary line X from the second bent portion 10 toward the free or open end 2), and have a shape in which the open end 2 is narrowed. Therefore, even if the protected material P has a small thickness, such as a sliding door or a door, the clamping pressure (clamping force (shape restoring force) toward the imaginary line X (or center line)) at the free or open end 2 of the legs 5 can be improved, and the free or open end 2 of the legs 5 can clamp and press the material.

[0050] In addition, since the protective material 1 has a protective space S with a diamond-shaped cross section, it can effectively protect even a protected material P having a complex shape with uneven parts. For example, the inner walls of the pair of arm parts 8 have arm inclined inner walls 8a that extend in a direction that narrows from the first bent part 7 toward the second bent part 10 (widening away from the imaginary line X as it goes from the second bent part 10 toward the leg part). Therefore, for example, as shown in FIG. 5(a), even if the protected material P has a tapered shape, the tapered tip of the protected material P can be brought into contact with the arm inclined inner walls 8a, and the contact area between the protective material 1 and the protected material P can be increased. Therefore, the holding force of the protective material 1 to the protected material P can be increased, and the protective material 1 can be stably held to the protected material P.

[0051] 5(b), even if the protected material P has an uneven portion, the protected material P can be brought into contact with the first curved wall 7a (the first curved inner wall 7d and / or the first inclined inner wall 7g) and the second curved wall 7b (the second curved inner wall 7e and / or the second inclined inner wall 7h), thereby increasing the contact area between the protective material 1 and the protected material P. Therefore, the holding force of the protective material 1 to the protected material P can be improved, and the protective material 1 can be stably held to the protected material P.

[0052] Also, since the protective material 1 is formed in a substantially symmetrical shape (the protective material 1 and the movable part 4 are linearly symmetrical with the imaginary line X (or center line) as the axis of symmetry) around the pair of free ends or opening ends (or introduction parts) 2 of the legs 5, attachment to the protected material P can be improved and the protective material 1 can be stably attached or fitted. Furthermore, since it has a substantially symmetrical shape, there is no directionality (front-to-back directionality) with respect to the protected material P, attachment to the protected material P can be improved and the protected material P can be effectively protected.

[0053] Furthermore, since the width (protruding width) W of the protective material 1 is smaller than the height (depth or depth) H, the width (protruding width) W can be made smaller and flatter than conventional protective materials, so the volume can be made smaller (compacterized) and space can be saved. This reduces transportation and storage costs. In addition, when attached to the protected material P, the first bent portion 7 of the protective material 1 can be prevented from protruding in the width (protruding width) W direction (thickness direction of the protected material P) compared to conventional protective materials. Therefore, it does not interfere with the loading and unloading work, and the decrease in the loading and unloading work efficiency can be suppressed. In particular, even if it is attached to a protected material P (such as a door) with a relatively small thickness PD, the loading and unloading work efficiency can be improved.

[0054] In addition, the shape restoring force may decrease when the width (protruding width) W is reduced. Even in such a case, the decrease in the shape restoring force can be compensated for or compensated for by adjusting the height (depth) H, and the decrease in the holding force for the protected material P can be suppressed.

[0055] When the protective material 1 is attached to the protected material P using adhesive tape, there is a risk that the protected material P will be damaged when the adhesive tape is peeled off. Specifically, when the protected material P is a wall material, there is a risk that the wallpaper of the wall material will peel off when the adhesive tape is peeled off. In this embodiment, the protective material 1 can be attached to the protected material P without using adhesive tape such as masking tape, so that damage to the protected material P can be suppressed.

[0056] In addition, the pair of legs 5 do not need to extend in a direction expanding from the free end or opening end 2 (a direction approaching the imaginary line X as it moves from the second bend portion 10 toward the free end or opening end 2), and for example, the pair of legs 5 may extend approximately parallel to each other (e.g., approximately parallel to the imaginary line X) as shown in Figure 6(a) showing a first modified example of the protective material 1 according to the first embodiment.

[0057] The legs 5 do not necessarily need to extend in a substantially straight line, and may be curved and bulged outwardly (toward the outside) or inwardly (toward the inside). When the pair of legs 5 are curved and bulged outwardly, this is advantageous for improving the clamping force (gripping force) at the free end or the open end 2.

[0058] The protrusions (fastening parts) 6 at the tips (free ends) of the legs 5 do not need to bulge outward, and may be formed to bulge inward (in a direction facing each other) at the tips (free ends) of the legs 5 as shown in Fig. 6(b) which shows a second modified example of the protective material 1 according to the first embodiment. In this form, the protrusions (fastening parts) 6 can clamp the protected material P, improving the holding force (locking force) of the protective material 1 against the protected material P.

[0059] Furthermore, the pair of arm portions 8 do not need to be inclined in a direction away from each other (widening direction) as they extend from the second bend portion 10 toward the leg portion 5, and for example, the pair of arm portions 8 may extend approximately parallel to each other (approximately parallel to the imaginary line X).

[0060] The arm portion 8 does not need to extend in a substantially straight line, but may be curved in such a way that it bulges outward (outside) or inward (inside) as it extends from the second bend portion 10 toward the leg portion 5.

[0061] In the first embodiment, the first bent portion 7 does not need to be formed in the approximate center in the width direction of the protective material 1 (the arm portion 8 and the leg portion 5 do not need to have approximately the same length), and the first bent portion 7 may be located on the free end or opening end 2 side or on the second bent portion 10 side, and the lengths of the leg portion 5 and the arm portion 8 may be different. For example, the arm portion 8 may be longer or shorter than the leg portion 5.

[0062] Furthermore, the movable portion 4 extending from the second bent portion 10 is not limited to having two first bent portions 7, and may have three or more first bent portions.

[0063] The shape of the protrusion (fastening portion) 6 is not limited to a substantially circular cross section, and may be an elliptical or rectangular cross section as long as the holding power of the protective material 1 is not reduced.

[0064] [Second embodiment] The configuration of the protective material 11 according to the second embodiment will be described with reference to Fig. 7(a). The second embodiment is similar to the first embodiment except that the configuration of the first bent portion 17 is different from that of the first embodiment. Therefore, the description of the parts that overlap with the first embodiment will be omitted.

[0065] 7(a), in the present embodiment, the protective material 11 differs from the first bent portion 7 of the first embodiment in that the first bent portion 17 in the released or natural state protrudes outwardly to the side in a gentle V-shaped cross section (V-shaped cross section with curved top and bottom). That is, the protective material 11 has a diamond-shaped cross section with a width (protruding width) W smaller than a height (depth or depth) H, and one corner with a small internal angle forms an openable free end (opening end or introduction portion) 2, and the corner portion (first bent portion 17) adjacent to this openable corner portion protrudes outwardly to the side in a triangular shape with a curved top (bent top wall 17c) and bottom (first curved wall 17a and second curved wall 17b).

[0066] More specifically, the first curved portion 17 includes a first curved wall 17a (first curved inner wall 117d) that extends in a gentle curved R-shape in the lateral outward direction (outer direction) as it extends from the arm portion 8 toward the leg portion 5, a second curved wall 17b (second curved inner wall 17e) that extends in a gentle curved R-shape in the lateral outward direction (outer direction) as it extends from the leg portion 5 toward the arm portion 8, and a curved top wall 17c (third curved inner wall 17f) that extends in the lateral outward direction (outer direction) from the first curved wall 17a and the second curved wall 17b and merges in a gentle curved shape.

[0067] Between the curved top wall 17c (third curved inner wall 17f) and the first curved wall 17a (first curved inner wall 17d) and the second curved wall 17b (second curved inner wall 17e) are interposed a first inclined wall (first inclined inner wall 17g) and a second inclined wall (second inclined inner wall 17h) which are longer than those in the first embodiment.

[0068] In addition, the radius of curvature (degree of curvature) of the first curved wall 17a (first curved inner wall 17d), the second curved wall 17b (second curved inner wall 17e), and the bent top wall 17c (third curved inner wall 17f) is larger than the radius of curvature (degree of curvature) of the first curved inner wall 7d, the second curved inner wall 7e, and the third curved inner wall 7f in the first embodiment, and is formed to be, for example, about 15 to 20 mm.

[0069] In the protective material 11 having such a configuration, the radii of curvature of the first curved inner wall 17d, the second curved inner wall 17e, and the third curved inner wall 17f are large, thereby increasing the holding force even for a protected material P having a larger thickness PD.

[0070] Moreover, with the protective material 11 according to the second embodiment, the protective material 11 can also be easily attached to the protected material P by simply widening the free or open end (introduction portion) 2 and guiding or inserting the protected material P into the protective space S, improving the ease of attachment. Furthermore, because the width (protruding width) W of the protective material 11 is smaller than the height (depth) H, when the protective material 11 is attached or attached to the protected material P (deformed state), the first bent portion 17 of the protective material 11 can be prevented from protruding laterally from the protected material P, improving the ease of loading and unloading.

[0071] As shown in FIG. 7(b), a protrusion (fastening portion) 6 that bulges in an arc shape may be formed on the inside of the free or open end 2 of the leg portion 5.

[0072] [Third embodiment] The configuration of the protective material 21 according to the third embodiment will be described with reference to Fig. 8(a). The third embodiment is similar to the first and second embodiments, except that the configuration of the first bent portion 27 is different from the first and second embodiments. Therefore, a description of the parts that overlap with the first and second embodiments will be omitted.

[0073] As shown in FIG. 8(a), in a released or natural state, the protective material 21 extends from the leg portion 5 and the arm portion 8, a first bent portion 27 is formed which protrudes outwardly to the side, and has a cross-sectional shape that is approximately a diamond-shaped frame.

[0074] That is, the protective material 21 has a shape of a diamond-shaped frame in cross section with a width (projecting width) W smaller than the height (depth) H, and one corner with a small inner angle is open or openable. The first bent portion 27 has a pair of legs 5 extending from a pair of free ends (opening ends or introduction parts) 2 forming the insertion opening (opening) 1h in a direction away from each other (widening direction) at an incline in a substantially linear manner, a pair of arms 8 extending from the second bent portion 10 in a direction away from each other (widening direction) at an incline in a substantially linear manner, and a second bent portion 10 in which the pair of arms 8 join together and protrude outward (to the outside) in a V-shaped cross section (substantially triangular mountain shape). That is, the first bent portion 27 has an inner wall extending linearly without forming the first curved wall 7a (first curved inner wall 7d) and the second curved wall 7b (second curved inner wall 7e) in the first embodiment.

[0075] The leg 5 is formed to extend in a substantially linear manner in a direction approaching the imaginary line X as it moves from the first bent portion 27 toward the free or open end 2, and the arm 8 is formed to extend in a substantially linear manner in a direction moving away from the imaginary line X as it moves from the second bent portion 10 toward the first bent portion 7. In addition, the protrusion (retaining portion) 6 is formed to bulge in an arc shape on the outside of the free or open end 2 of the leg 5.

[0076] In the protective material 21 according to the third embodiment, the introduction portion 2 can be expanded and the protective material 21 can be easily attached to the protected material P. Moreover, since the width (protruding width) W of the protective material 21 is smaller than the height (depth) H, when the protective material 21 is attached to the protected material P (deformed state), the first bent portion 27 of the protective material 21 can be prevented from protruding significantly to the side from the protected material P, improving the ease of loading and unloading.

[0077] As shown in FIG. 8(b), similarly to the first and second embodiments, the protrusion (fastening portion) 6 at the free or open end 2 of the leg portion 5 may be formed to bulge inward in an arc shape.

[0078] The protective material (curing material) according to the present disclosure is not limited to the above embodiment described with reference to Figs. 1 to 8(b), and the present disclosure has a movable part (a movable clamping part formed by the pair of legs, at least a pair of first bent parts, and a pair of arms) that can be expanded or rotated with the second bent part as a fulcrum, and at least a part of the protected material is accommodated in a protective space (within the protective part formed by the second bent part and the movable part) to clamp or sandwich the protected material to protect it. In other words, the protective material (curing material) according to the present disclosure can be embodied in various aspects without departing from the gist of the present disclosure. Furthermore, the shapes, dimensions, materials, etc. shown in the above embodiment are merely examples and are not particularly limited, and various modifications are possible within a range that does not substantially deviate from the effects of the present disclosure.

[0079] For example, the pair of legs may extend from a pair of free ends (openings or introduction parts) that form an insertion port (opening) through which the protected material can be inserted to a first bent part and be expandable. That is, the pair of legs may extend from a first bent part, form the insertion port (an introduction part that can form an opening) with a pair of free ends, and be expandable. The pair of legs may be expandable or rotatable about at least the first bent part as a fulcrum, and may be expandable or rotatable in a multi-joint manner about the first bent part and the second bent part as fulcrums. The pair of free ends located at the ends of the pair of legs do not need to be separated from each other, and may be in contact with each other.

[0080] As described above, the pair of legs 5 may extend from a pair of free ends (opening ends or introduction parts) forming the insertion opening in a direction away from each other (widening direction) to the first bent part; may extend parallel to each other (approximately parallel to the virtual line X) to the first bent part; or at least one of the legs 5 may be inclined in a direction widening from the free or opening end 2 to the first bent part. In a preferred embodiment, at least one of the pair of legs (particularly both legs) extends from a pair of free ends (opening ends or introduction parts) forming the insertion opening in a direction away from each other (widening direction) to the first bent part. In other words, the pair of legs may extend in a direction approaching each other (narrowing direction) from the first bent part toward the opening to reach the free end to form the insertion opening (opening end or introduction part).

[0081] The pair of legs may be formed in a straight or curved shape, and the curved legs may be formed in a curved shape that bulges outwardly (toward the outside) or inwardly (toward the inside) (e.g., slightly bulges and curves in an arch shape). In a preferred embodiment, the pair of legs may be formed in a straight or curved shape that bulges outwardly. For example, as shown in FIG. 9, in the first embodiment and its modified examples, the pair of legs 35 may be formed in a curved (or arched) shape that bulges outwardly (toward the outside) from the first bent portion 37 having an apex or top 37t toward the free or open end 2 and is narrowed at the free or open end 2 (or the insertion opening 1h is closed at the free or open end 2). In protective material 31 of this type, particularly in a form in which the pair of legs narrow at the free or open end and bulge outwardly to the sides (or have an arched form), the clamping pressure can be concentrated at the free or open end 2, greatly improving the clamping force (gripping force) at the free or open end 2. The pair of legs 35 have curved inclined inner walls 35a.

[0082] Furthermore, the pair of arm portions 38 may also be formed in a curved shape that does not extend linearly from the second bent portion 10, but bulges outwardly (away from each other) as it moves from the second bent portion 10 toward the first bent portion 37. By forming the pair of arm portions 38 in a curved shape, the clamping force (gripping force) at the pair of arm portions 38 and the free or open end 2 can be improved. Therefore, by combining the pair of legs 35 and the pair of arm portions 38, the clamping force can be effectively concentrated on the free or open end 2 of the protective material 31, and the clamping force (clamping force) at the free or open end 2 can be greatly improved. The pair of arm portions 38 have a curved arm inclined wall (arm inclined inner wall 38a).

[0083] It is not necessary to curve (or arch) both the pair of legs 35 and the pair of arms 38, and at least one movable portion of the pair of legs 35 and the pair of arms 38, particularly at least one pair of legs 35, and further at least one leg of the pair of legs 35 may be curved (or arched). The pair of arms 38 may be curved and bulged outwardly (away from each other) and formed in an arch shape narrowing at the first bent portion 37.

[0084] In addition, it is not necessary to form a protrusion (fastening portion) on the leg. In addition, the protrusion may be formed on at least one of the legs, or on both of the pair of legs. The protrusion does not need to be formed on the free end (open end) of the leg, and may be formed in a portion that can come into contact with the protected material. The protrusion may be formed on at least one of the free ends of the leg, and is usually often formed on the pair of free ends (open end or introduction portion) of the leg. The protrusion may be formed in a form that protrudes or bulges on the inside and / or outside of the leg (particularly the pair of free ends or the insertion port). The protrusion can be formed in a form that can come into contact with the protected material, and the protrusion (fastening portion) does not need to be in a circular cross section, and may be in a polygonal shape (rectangular shape) such as a triangular cross section that can come into contact with or press the protected material at the tip (free end).

[0085] The first bent portion (first fulcrum or inflection portion) may have a bent or curved shape protruding or bulging outwardly from a pair of legs (and / or arms), and the first bent portion (first fulcrum or inflection portion) may protrude or bulge from a pair of legs (and / or arms) in a diagonally downward direction, a diagonally upward direction, or in a lateral direction (a direction intersecting with the imaginary line X (or center line) (a direction intersecting diagonally or perpendicularly)). The first bent portion may have a curved wall that extends in an arc-shaped curve outwardly from the pair of legs and the pair of arms as it approaches, and a bent top wall that extends from the curved wall and bends or curves to join. The first bent portion may also have a curved wall, an inclined wall that extends from the curved wall, and a bent top wall that is bent or curved from the inclined wall. The curved walls (first curved wall and second curved wall) may be positioned opposite or facing each other (opposite or facing in a direction intersecting (particularly, perpendicular) to the imaginary line X), and the two opposing or facing curved walls may be curved in a direction away from the imaginary line X (outward to the side) as they approach each other from the leg and arm portions.

[0086] The first bent portion (fulcrum portion) usually has a V-shaped or U-shaped cross section, but may also have a U-shaped cross section or the curved base portions (two curved portions) of the leg and arm portions may be constricted and may protrude or bulge outward to the side (in a direction intersecting (or perpendicular to) the imaginary line X).

[0087] The protective material (curing material) has at least a pair of first bent parts (first fulcrum parts or inflection parts). Each movable part (expanding or clamping part formed by a leg part, a first bent part, and an arm part) extending from the second bent part may have at least one first bent part, and may have a plurality of first bent parts, for example, about 2 to 5 (for example, 2 to 3), depending on the shape of the protected material P. In other words, at least one first bent part may be interposed between the leg part and the arm part, and multiple first bent parts connected via a connecting part may be interposed as necessary. In a preferred embodiment, each movable part has one first bent part. In the protective material (curing material) and the movable part, the first bent parts are not necessarily located on both sides facing each other, and may be located on both sides with a position shift in the height (depth or depth) H direction.

[0088] The pair of arms may extend from the first bent portion to form a second bent portion, and may be expandable with at least the second bent portion as a fulcrum. The pair of arms may be inclined in a direction expanding from the second bent portion toward the opening, as described above; may extend substantially parallel to each other (substantially parallel to the virtual line X); and at least one of the arms may be inclined in a direction approaching each other (converging direction or narrowing direction) from the first bent portion toward the second bent portion. In a preferred embodiment, at least one of the pair of arms (particularly both arms) may extend in a direction approaching each other (narrowing direction) from the first bent portion toward the second bent portion. In other words, the pair of arms may be formed extending from the second bent portion in a direction away from each other (expanding direction) (i.e., a direction away from each other (expanding direction) toward the first bent portion).

[0089] The pair of arms may be formed in a straight or curved shape, similar to the pair of legs, and the curved arm may be curved in a shape that bulges outward (toward the outside) or inward (toward the inside) (for example, a slightly bulging shape such as an arch). In a preferred embodiment, the pair of arms may be formed in a straight shape or a curved shape that bulges outward and curves.

[0090] The arm portion may be capable of opening or rotating about at least the second bent portion as a fulcrum, or may be capable of opening or rotating about the second bent portion and the first bent portion as fulcrums. That is, the pair of legs and the arm portion may each be capable of opening or rotating about the first bent portion as a fulcrum.

[0091] The second bent portion (second fulcrum portion or inflection portion) can be formed by a joined arm portion (for example, an arm portion extending in a convergent direction from the first bent portion and joining), and the second bent portion does not necessarily need to be located opposite the insertion opening (an opening or introduction portion formed by the free ends of a pair of legs), and may be located away from the opposing position to the insertion opening (the opening or introduction portion) in the lateral direction. In a preferred embodiment, the second bent portion can be formed by protruding or bulging outward (in the direction of the imaginary line X) opposite the insertion opening. The second bent portion, like the first bent portion, is not limited to a V-shaped or U-shaped cross section, and may protrude or bulge outward in a U-shaped cross section or with a constricted protruding or curved base.

[0092] Furthermore, the configurations or elements of the first to third embodiments may be appropriately combined. For example, the first curved wall 7a (first curved inner wall 7d) in the first embodiment and the second curved wall 17b (second curved inner wall 17e) in the second embodiment may be combined to form the first curved inner wall 7d and the second curved inner wall 17e with different radii of curvature.

[0093] In addition, the protective material (curing material) and the movable part do not need to be symmetrical (line-symmetrical) about the imaginary line X connecting the insertion opening (opening or introduction part) formed by the free ends of a pair of legs and the second bend part, and may be asymmetrical.

[0094] For example, in the first embodiment, the protective material is not limited to a shape in which the virtual line X is substantially perpendicular to the introduction surface 1S (for example, a line-symmetric shape), but may be a shape in which the virtual line X is inclined (for example, slightly inclined) with respect to the introduction surface 1S (for example, an asymmetric shape). Specifically, the protective material may be a shape in which the second bent portion is displaced in the lateral direction from the central axis line (virtual line X) of the protective material, and one arm portion is longer than the other arm portion.

[0095] Furthermore, the asymmetric protective material may have a configuration in which the center line is away from the imaginary line X, for example, a configuration in which one of a pair of opposing walls (movable parts) extending from the second bend is positioned laterally outward relative to the other bend (a configuration in which the position is shifted laterally outward (in the width (protruding width) W direction) from the imaginary line X), a configuration in which one opposing wall (movable part) is positioned laterally outward relative to the other opposing wall (movable part) (a configuration in which the position is shifted laterally outward (in the width (protruding width) W direction) from the imaginary line X), etc.

[0096] Furthermore, in an asymmetric protective material, the length of the pair of legs, the length of the pair of arms, the position and bending or curvature of the pair of bending portions, and / or the bending or curvature of the wall portion forming the second bending portion may be different. Furthermore, in an asymmetric protective material, the inclination angle or curvature of at least one of the pair of legs and / or at least one of the pair of arms may be different, and at least one of the legs and / or at least one of the arms may be deformed.

[0097] In a preferred embodiment, when the virtual line X is used as a reference, the protective material may have a shape that is approximately symmetrical about the virtual line X (center line) (for example, a shape that is linearly symmetrical about the virtual line X as an axis of symmetry). Also, the protective material may have a shape in which the distance between a pair of free ends of the legs forming the insertion opening and the second bent portion is equal to or greater than the distance between the first bent portions. Specifically, the protective material has a shape that is approximately a rectangular or diamond-shaped frame in cross section.

[0098] A representative protective material (or curing material) may have a roughly rectangular or diamond-shaped cross-section with one corner that can be opened or closed (a pair of free ends can form the insertion opening (introduction part)), and both sides of the openable corner may form a pair of expandable legs (or clamping parts). In particular, the protective material may have a roughly diamond-shaped cross-section with one corner with a small internal angle that forms a free or open end (insertion part or introduction part) that can be opened or closed, a first bent part formed at a corner part adjacent to the openable corner part, and a second bent part formed at a corner part opposite the openable corner part.

[0099] The protective material having a generally rectangular cross section also includes a protective material having a generally rhombic cross section, and may have a square cross section, a rectangular cross section, a trapezoid cross section, a rhombic cross section, a parallelogram cross section, etc. A preferred protective material may have a rhombic cross section.

[0100] The protective material is not limited to a long member, and may be selected according to the protected material P (protected range or protected portion R), and may be a short member.

[0101] The movable parts (arm parts, first bent parts, and legs) excluding the convex parts (fastening parts) may be formed with approximately the same thickness T, and from the viewpoint of shape restoring force and wearability, the thickness T may be, for example, about 3 to 20 mm, preferably 5 to 15 mm, more preferably 6 to 12 mm, and particularly about 5 to 10 mm (for example, 7 to 9 mm) depending on the application. If the thickness T is too small, the shape restoring force (clamping force) may decrease, the holding force for holding the protected material P may decrease, and the bending rigidity may decrease. On the other hand, if the thickness T is too large, the bending rigidity may become too large, and the efficiency of the installation or mounting work may decrease.

[0102] In the protective material, the width (projecting width) W and the height (depth or depth) H can be selected in consideration of the size and shape of the protected range or protected part R (or the protected material P) according to the form of the protected material P from the viewpoint of attachment and detachment to the protected material P. The ratio (H / W) of the height (depth) H to the width (projecting width) W may be, for example, 0.5 / 1 to 10 / 1 (for example, 0.7 / 1 to 8 / 1), preferably 1 / 1 to 6 / 1 (for example, 1.5 / 1 to 5 / 1), more preferably about 2 / 1 to 4 / 1, or may be about 1 / 1 to 2 / 1. A protective material whose width (projecting width) W is equal to or smaller than the height (depth) H (a protective material whose width (projecting width) W≦height (depth) H) can be suitably used for a protected material P having a relatively small thickness PD, such as a door, and can protect the protected part (protected range) R of the protected material P in a wrapped state. Furthermore, when the width (projecting width) W of the protective material is made smaller than the height (depth) H, the volume can be reduced, which is advantageous in reducing transportation and storage costs. The ratio (H / W) of the height (depth) H to the width (projecting width) W may be, for example, 0.1 / 1 to 2 / 1 (for example, 0.15 / 1 to 1.5 / 1), preferably 0.17 / 1 to 1 / 1 (for example, 0.2 / 1 to 0.7 / 1), more preferably about 0.25 / 1 to 0.5 / 1, or may be about 0.5 / 1 to 1 / 1. A protective material having a small ratio (H / W) (for example, a protective material having a relatively wide shape) can effectively protect the protected portion (protected range) R of the protected material P in a state of being wrapped around it, even if the protected material P has a wide member attached to the inserted portion or a wide portion formed therein (for example, a double-door door with a handle, lever, or the like attached).

[0103] The width (insertion width) of the protective portion R may be selected from a range of about 90% or less (e.g., 30 to 90%, preferably 50 to 85%, more preferably 60 to 80%) of the height (depth) H of the protective material, and the thickness PD of the protective portion R may be selected from a range of about 100% or less (e.g., 10 to 80%, preferably 20 to 70%, more preferably 30 to 60%) of the width (protruding width) W of the protective material. The height (depth) H of the protective material may be, for example, about 100 to 250 mm (e.g., 100 to 150 mm, specifically 120 mm), and the width (protruding width) W of the protective material may be, for example, about 60 to 250 mm (e.g., 60 to 100 mm, specifically 85 mm). The height (depth) H of the protective material may be, for example, about 100 to 150 mm (for example, 120 mm), and the width (protruding width) W of the protective material may be, for example, about 60 to 100 mm (for example, 85 mm). The dimensions of the protective material (particularly the height (depth) H) can be selected according to the holding force for the protected material P.

[0104] If the dimensions of the protective material (width (protruding width) W and / or height (depth or depth) H) are too large relative to the dimensions of the protected area R (thickness PD and / or width), the retention of the protective material to the protected material P may be reduced, and there is a risk of it falling off; if they are too small, there is a risk that the attachment of the protective material to the protected area R may be reduced.

[0105] The thickness PD of the material P to be protected may be, for example, 5 to 110 mm, preferably 10 to 100 mm, more preferably 20 to 90 mm, particularly about 30 to 80 mm, or may be about 50 to 70 mm (eg, 60 mm).

[0106] In the present disclosure, the protective material is used, and the material to be protected can be attached to the protective material through a pair of free ends (or insertion openings) of the protective material (or by opening the pair of free ends), thereby effectively protecting the material to be protected. In particular, the clamping function is improved, and the protective material can be easily attached in a one-touch manner without using adhesive tape, and the material to be protected can be cured and protected by gripping or clamping the material to be protected with the protective material.

[0107] In the above description, the open ends of the pair of legs are described as the insertion opening of the protective material, but the free ends (insertion openings) of the pair of legs of the protective material may form an insertion portion that can be inserted or attached between the protected materials. That is, the insertion opening (pair of free ends) of the protective material can be read as an insertion portion that can be inserted between the protected materials. In this embodiment, the second bent portion, preferably the insertion portion (pair of free ends), can be inserted between the protected materials, leading the way, and by interposing at least a part of the protective material between the protected materials, the protected materials can be protected.

[0108] [Protective material manufacturing method] The protective material 1 can be produced by a conventional method, for example, by extruding a foamable resin composition and cooling it with a sizing die. For the production method of the protective material 1, for example, JP-A No. 2000-274081 and the above-mentioned Patent Document 1 can be referred to.

[0109] [Resin composition] The resin composition contains a base resin, and may contain a foaming agent, a cell regulator, a shrinkage inhibitor, and additives as necessary.

[0110] Examples of the base resin include olefin resins, styrene resins, vinyl chloride resins, vinyl acetate resins, polyvinyl alcohol resins, acrylic resins, polyacetal resins, polyester resins, polycarbonate resins, polyamide resins, and thermoplastic elastomers containing the constituent components of these resins. These resins may be used alone or in combination of two or more.

[0111] The base resin is preferably an olefin-based resin (e.g., polyethylene-based resin, polypropylene-based resin, etc.), a styrene-based resin (e.g., polystyrene, etc.), or a thermoplastic elastomer (e.g., an olefin-based thermoplastic elastomer, a styrene-based thermoplastic elastomer, etc.), and from the viewpoint of excellent mechanical properties such as impact absorption ability and shape recovery performance, an olefin-based resin is particularly preferable.

[0112] Olefin resins include α-C polyethylenes such as polyethylenes (high-density polyethylene, low-density polyethylene, linear low-density polyethylene, etc.), polypropylene, and ethylene-propylene copolymers. 2-4 Examples include linear olefin homopolymers or copolymers, and ethylene-vinyl acetate copolymers (EVA resins), and polyethylene resins such as high density polyethylene, low density polyethylene, and linear low density polyethylene are commonly used.

[0113] Examples of the foaming agent include conventional foaming agents such as decomposable foaming agents (chemical foaming agents) and volatile foaming agents (physical foaming agents). The foaming agent may be a decomposable foaming agent, but a volatile foaming agent is preferred from the viewpoint of easily improving the foaming ratio.

[0114] Examples of volatile blowing agents include inorganic blowing agents (nitrogen, carbon dioxide, oxygen, air, water, etc.), organic blowing agents (aliphatic hydrocarbons, alicyclic hydrocarbons, aromatic hydrocarbons, chlorinated hydrocarbons, fluorinated hydrocarbons, alcohols, ethers, aldehydes, ketones, etc.), etc. As the volatile blowing agent, lower aliphatic hydrocarbons such as butane (n-butane or isobutane) and pentane (n-pentane, isopentane, etc.) are preferred because they are less toxic and inexpensive.

[0115] The proportion of the foaming agent is, for example, about 0.01 to 30 parts by mass, preferably 0.1 to 25 parts by mass, more preferably 1 to 20 parts by mass, and particularly preferably 5 to 15 parts by mass, relative to 100 parts by mass of the base resin.

[0116] Examples of the foam regulator include silicon compounds (talc, silica, zeolite, etc.), inorganic acid salts (carbonates or bicarbonates such as sodium carbonate and sodium bicarbonate, etc.), organic acids or their salts (citric acid, sodium citrate, calcium stearate, aluminum stearate, zinc stearate, etc.), metal oxides (zinc oxide, titanium oxide, aluminum oxide, etc.), metal hydroxides (aluminum hydroxide, etc.), etc. These foam regulators may be used alone or in combination of two or more.

[0117] The proportion of the cell regulator is, for example, about 0.01 to 50 parts by mass, preferably 0.05 to 25 parts by mass, more preferably 0.1 to 20 parts by mass, and particularly preferably 0.5 to 10 parts by mass, relative to 100 parts by mass of the base resin.

[0118] Examples of shrinkage inhibitors include fatty acid esters (C glycerides such as palmitic acid mono- or triglyceride, stearic acid mono- or triglyceride, etc. 8-24 Esters of fatty acids and polyhydric alcohols, etc.), fatty acid amides (palmitic acid amide, stearic acid amide, etc. C 8-24 These shrinkage inhibitors can be used alone or in combination of two or more.

[0119] The proportion of the shrinkage inhibitor is, for example, about 0.01 to 30 parts by mass, preferably 0.05 to 20 parts by mass, more preferably 0.1 to 10 parts by mass, and particularly preferably 1 to 5 parts by mass, relative to 100 parts by mass of the base resin.

[0120] Examples of additives include colorants (dyes, pigments, etc.), surface smoothing agents, stabilizers (antioxidants, heat stabilizers, ultraviolet absorbers, etc.), viscosity regulators, compatibilizers, dispersants, antistatic agents, antiblocking agents, antifogging agents, fillers (calcium carbonate, carbon fibers, etc.), slip agents, release agents, lubricants, impact modifiers, plasticizers, flame retardants, biocides (bactericides, bacteriostatic agents, antifungal agents, preservatives, insect repellents, etc.), deodorants, etc. These additives can be used alone or in combination of two or more.

[0121] The expansion ratio of the resin foam can be selected, for example, from the range of about 10 to 80, preferably 15 to 60, and more preferably 20 to 40. If the expansion ratio is too low, the impact absorption capacity decreases, and if the expansion ratio is too high, the shape recovery capacity decreases. Therefore, the expansion ratio is set in consideration of the balance between the impact absorption capacity and the retention capacity for holding the protected material P.

[0122] The resin foam has an average cell diameter of, for example, about 0.2 to 3 mm (e.g., 0.3 to 2 mm), preferably 0.4 to 1.8 mm, more preferably 0.5 to 1.5 mm, and particularly preferably 0.8 to 1.3 mm. If the average cell diameter is too low, it becomes difficult to increase the expansion ratio, and if it is too large, the surface smoothness and mechanical properties decrease.

[0123] The cell structure of the resin foam may be an open cell structure, but preferably contains at least a closed cell structure, and more preferably is a closed cell. The ratio of closed cells to the total number of cells (the sum of open cells and closed cells) is, for example, about 85 to 100%, preferably 90 to 100% (e.g., 90 to 99%), more preferably 93 to 100%, and particularly preferably 93 to 99%.

[0124] In a preferred embodiment, the resin foam may be formed of a closed-cell foam containing at least an olefin-based resin (eg, an ethylene-based resin).

[0125] The resin foam may have a basis weight of, for example, about 30 to 200 g / m, preferably about 50 to 150 g / m, and more preferably about 70 to 100 g / m. As the basis weight increases, the rigidity and elasticity increase, and the holding force (sandwiching force) also increases.

[0126] It should be noted that each feature disclosed herein may be combined with any other feature disclosed herein. EXAMPLES

[0127] The present invention will be described below based on examples, but the present invention is not limited to these examples.

[0128] Examples 1 to 10 In accordance with the examples of JP 2000-274081 A, 20 parts by mass of a hydrocarbon-based low-boiling point foaming agent was used as a foaming agent, and the resin composition having the above composition was foamed and extruded, and then cooled with a sizing die to produce multiple samples (protective materials) having the form shown in FIG. 2.

[0129] (Resin composition) Low-density polyethylene (Sumitomo Chemical Co., Ltd., "F101") 100 parts by mass Air bubble regulator (manufactured by Nippon Talc Co., Ltd., "Microace K-1") 1.0 part by mass Shrinkage prevention agent ("ACTIV325" manufactured by Nippon Boehringer Co., Ltd.) 3.2 parts by weight

[0130] In addition, the density (apparent density), basis weight and expansion ratio of each sample were measured in accordance with JIS K 6767, and various dimensional sizes were also measured. In addition, the holding power of each sample was measured as follows.

[0131] [Apparent Density] The apparent density was measured by the underwater displacement method. That is, the apparent density was calculated based on the weight (g) of the foam in air and the weight (g) in water according to the following formula:

[0132] Apparent density ρf(g / cm 3 )=A / (AB)×(ρw-d)+d (Wherein, A is the weight of the sample in air (g), B is the weight of the sample in water (g), and ρw is the density of water (g / cm 3 ), d is the density of air (g / cm 3 ) indicates.

[0133] [Metaku] The basis weight was calculated based on the weight (g) of the sample in air and its dimensional size.

[0134] [Expansion ratio] The expansion ratio is the apparent density ρf (g / cm 3 ) was measured and calculated according to the following formula:

[0135] Foaming ratio (times) = ρ / ρf (where ρ is the resin density before foaming (g / cm 3 ) indicates.

[0136] [Holding force] Figures 10(a) and 10(b) are diagrams for explaining a method for measuring the holding force. Note that Figure 10(b) shows the state in which the wood JW and the measuring jig JM shown in Figure 10(a) are sandwiched between the sample JS, and the table JD is omitted.

[0137] As shown in Fig. 10(a) and Fig. 10(b), the holding force of each sample JS was measured using a piece of wood JW (length 1 m) and a measuring jig JM (analog scale manufactured by Tanita; width 11.0 cm, length 10.3 cm, height 3.7 cm, weight 335 g). First, the piece of wood JW was fixed to the table JD with its tip protruding from the table JD by a length of 1 m or more, and the measuring jig JM was attached on the notch at the tip of the piece of wood JW. At the attachment end of the measuring jig JM, the total thickness of the piece of wood JW and the measuring jig JM was 3.5 sun (105 mm). Next, the piece of wood JW and the measuring jig JM were sandwiched between the piece of wood JW and the measuring jig JM, which had been cut to a length of 1 m, and the piece of wood JS was attached. After leaving it for 10 minutes, the value (g) indicated by the measuring jig JM was read and recorded as the holding force.

[0138] The results are shown in Table 1. In Table 1, the inner circumference length (TD length) indicates the inner circumference length from the tip of one leg (projection 6) to the tip of the other leg (projection 6).

[0139] [Table 1]

[0140] From the results in Table 1, each sample has a holding power that allows it to be attached to the protected material. In addition, as the basis weight increases, the rigidity and elasticity increase, and there is a tendency for the holding power to increase. For example, when comparing Example 2 and Example 4, when the basis weight (product weight) increases by 13% by weight, the holding power increases by 23%. [Industrial Applicability]

[0141] The protective material (or curing material) of the present disclosure formed of a resin foam can be used to contain and protect at least a part of a protected material, and can be used to protect materials such as building materials (members forming architectural structures), sports goods, leisure goods, furniture, electric or electronic equipment, and / or household appliances. The protective material of the present disclosure (for example, a protective material having a diamond-shaped cross section) is useful for protecting a protected material having an uneven portion (including a protected material having a complex shape) or a relatively thin protected material in a form in which at least a part of the protected material is wrapped, and the protected material may be protected in a form in which almost the entire protected material is wrapped. For example, the protected material may be attached to the protective material through an insertion port of the protective material, and the protected material may be protected in a form in which at least a part of the protected material is wrapped. The material to be protected may be, for example, building materials with a relatively small thickness (doors, sliding doors, shoji screens, sliding doors, partitions, tables, tabletops, window components (sashes, etc.), etc.), rail components such as V-groove rails (for example, V-groove rails for transporting or transferring items using carts or the like at manufacturing and construction sites, threshold rails for opening and closing sliding doors, etc.); household or office items such as tables, tabletops, cutting boards, glass or ceramic plates; sporting goods such as surfboards, stand-up paddle boards, skis, skates, snowboards, etc., particularly sporting goods having a plate-like or edge portion (or blade portion) such as skis, skates, snowboards, etc.; leisure goods (camping equipment, outdoor equipment, etc.) such as tables, folding tables, folding chairs, etc.

[0142] In addition, at least a part of the protective material (or curing material) or buffer material of the present disclosure may be sandwiched between adjacent protected materials to protect the protected materials. The protective material (or curing material) may be inserted between the protected materials from the second bent portion side, but the protective material may be inserted from the insertion portion (pair of free ends) side to interpose the protective material (or curing material) between the protected materials. For example, the protective material or buffer material may be sandwiched between the protected materials having a relatively small thickness to protect the protected materials. At least one protective material may be interposed between adjacent protected materials depending on the size of the protected materials, or multiple protective materials may be interposed at different positions or scattered. Even in such an embodiment, the protective material can be stably held between adjacent protected materials (items) by utilizing the repulsive forces of the leg portion, the first bent portion, the arm portion, and the second bent portion, and damage to the protected materials (items) can be prevented and cured. Adjacent protected materials (articles) may be adjacent in any direction, such as the longitudinal and / or transverse directions.

[0143] Note that at least a part of the protective material (or curing material) may be interposed between the protected materials, and a pair of legs extending from the insertion portion (a pair of free ends) may be interposed, or the entire protective material may be interposed. For example, the interposition form of the protective material may be such that a pair of legs are interposed (or inserted) with a first bent portion extending outward from between the protected materials, a pair of legs and the first bent portion are interposed (or inserted) with a second bent portion extending outward from between the protected materials, or the entire protective material may be sandwiched between adjacent protected materials.

[0144] Furthermore, the form of protection can be selected according to the form of the protected material, and may be a combination of the wrapping form and the intervening form, and the protected materials may be members facing each other. For example, one protected material may be attached to the protective material through the insertion port of the protective material, wrapping at least a part of the protected material, and the second bent portion of the protective material wrapping the one protected material may be disposed facing the other protected material; or the wall portion of the protective material wrapping the one protected material may be disposed between the one protected material and the other protected material, thereby protecting both protected materials. For example, the rollers (or wheels) of a transport means such as a dolly may be inserted through the insertion port of the protective material and housed in the protective material to protect it, and the protective material housing the rollers (or wheels) may be disposed with the second bent portion facing the groove portion of the V-groove rail, and the wall portion of the protective material or buffer material may be disposed between the rollers (or wheels) and the V-groove rail.

[0145] In this way, by using the protective material (or curing material) of the present disclosure, damage to the material to be protected can be prevented during transportation, moving, and carrying in and out of furniture, home appliances, and electrical appliances. [Explanation of symbols]

[0146] 1,11,21,31…Protective material 1h…insertion port 2...Introduction part (free or open end) 3…Protection part 4...Movable part 5,35…legs 6…Convex part 7, 17, 27, 37…First bend 7d, 17d…First curved inner wall 7e, 17e…Second curved inner wall 7t, 17t, 27t, 37t... Vertex 8,38…Arm section 10…Second bend P…Protected material S…Protected space X: Virtual line H…Height W…width

Claims

1. A protective material formed of a resin foam for protecting a protected material, The device comprises a pair of legs extending from the pair of free ends and capable of spreading; a first bending portion bending or curving outwardly from the pair of legs and projecting or bulging outwardly; a pair of arms extending from the first bending portion and capable of spreading; and a second bending portion extending from the arms and joining them, A protective material, wherein the pair of leg portions, the pair of first bent portions, and the pair of arm portions form a movable portion that can be expanded or rotated with the second bent portion as a fulcrum.

2. 2. The protective material as described in claim 1, further comprising a pair of leg portions extending away from each other from the pair of free ends to a first bent portion, and a pair of arm portions extending toward each other from the first bent portion to a second bent portion.

3. 3. The protective material according to claim 1, wherein the pair of legs are formed in a straight line or in a curved shape bulging outwardly to the sides.

4. The protective material according to any one of claims 1 to 3, wherein the first bent portion comprises a curved wall extending in an R-shaped curve in a direction approaching the pair of leg portions and the pair of arm portions, respectively, and a curved top wall extending from the curved wall and bending or curving to join the curved wall.

5. A protective material as described in any one of claims 1 to 4, wherein the second bent portion is positioned opposite the free ends of the pair of legs and is bent or curved by protruding or bulging outwardly opposite the free ends of the pair of legs.

6. The protective material according to any one of claims 1 to 5, wherein the protective material has a generally rectangular or rhombic frame shape in cross section, one corner portion has an openable form, both sides of the openable corner portion form the pair of expandable legs, two corner portions adjacent to the openable corner portion form the first bent portion, and a corner portion positioned opposite the openable corner portion forms the second bent portion.

7. 7. The protective material according to claim 1, which has a generally rhombic frame shape in cross section, with one corner having a small internal angle being openable.

8. The protective material according to any one of claims 1 to 7, wherein the pair of free ends of the legs are formed with protruding or bulging convex portions on the inside and / or outside.

9. 9. The protective material according to claim 1, wherein the resin foam is a closed-cell foam containing at least an olefin-based resin.

10. A method for protecting a material to be protected, comprising attaching the material to the protective material via a pair of free ends of the protective material according to any one of claims 1 to 9.

11. A method for protecting a material to be protected, comprising interposing at least a part of the protective material according to any one of claims 1 to 9 between materials to be protected.

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