End face protective material for metal coil

Abstract

Provided is an end face protective material for a metal coil that can protect the entire end face of the metal coil while reducing the amount of wasted raw material. An end face protective material (1) for a metal coil protects end faces (11), (12) of a cylindrical metal coil (10). The end face protective material (1) comprises: a plurality of divided pieces (21), (22), (23), (24) obtained by dividing, along the circumferential direction, an annular member (2) covering the entire end faces (11), (12) of the metal coil (10) into a plurality of pieces; and a plurality of joining members (31), (32), (33), (34) that respectively join the circumferentially adjacent divided pieces (21) and (22), (22) and (23), (23) and (24), and (24) and (21).

Description

Metal coil end protection material

[0001] The present invention relates to a metal coil end surface protection material that protects the end surfaces of a metal coil.

[0002] Wire rod coils manufactured at steelworks are wound into coils at a hot rolling mill, transported to a warehouse on a pallet for temporary storage, and then supplied to consumers by transportation means such as a trailer or a ship. When the wire rod coils are placed on a pallet or stacked on a transportation means such as a trailer or a ship, they are handled by a crane. During this handling, the end faces of multiple wire rod coils may come into contact with each other, resulting in damage to the end faces. Furthermore, when multiple wire rod coils are transported by transportation means such as a trailer or a ship, the end faces of multiple wire rod coils may come into contact with each other, resulting in damage to the end faces. Therefore, in the past, in order to protect the end faces of the wire rod coils, after the wire rods are wound into coils at a hot rolling mill, end face protection materials have been attached to the end faces of the wire rod coils.

[0003] Meanwhile, a method for packaging metal coils, such as steel sheet coils, for protecting the metal coils has been proposed in the past, for example, as shown in Patent Document 1. The method for packaging metal coils shown in Patent Document 1 involves directly attaching a protector that protects the corners between the outer peripheral end and end face of the steel sheet coil to the surface of the steel sheet coil with adhesive tape, and then packaging the steel sheet coil together with the protector in inner and outer packaging papers. The method for packaging metal coils shown in Patent Document 1 makes it possible to prevent damage to the metal coil and packaging paper during transportation.

[0004] Furthermore, a coil packaging material used for coil packaging has been proposed in the past, for example, as shown in Patent Document 2. The coil packaging material shown in Patent Document 2 comprises a hard plate member having a central annular protrusion with an outer diameter smaller than the inner diameter of the coil and having a through hole drilled in the axial direction of the protrusion, and a bendable soft plate member arranged around the outer edge of the hard plate member. According to the coil packaging material shown in Patent Document 2, the annular protrusion of the hard plate member is inserted into the inner diameter portion of the side surface of the coil to be packaged (the end surface of the coil), and the bendable soft plate member arranged around the outer edge of the hard plate member can cover the coil end including the side surface and edge of the coil, regardless of the outer diameter of the coil.

[0005] Japanese Patent Application Laid-Open No. 2003-327289 Japanese Utility Model Application Laid-Open No. 2-87509

[0006] However, the conventional metal coil packaging method disclosed in Patent Document 1 and the coil packaging material disclosed in Patent Document 2 have the following problems. Specifically, in the metal coil packaging method disclosed in Patent Document 1, only the corners between the outer peripheral edge and the end face of the steel sheet coil are protected with a protector, and the entire end face of the coil cannot be protected. On the other hand, in the coil packaging material disclosed in Patent Document 2, the entire end face (side face) of the coil can be protected by a soft plate-like member. However, it is necessary to manufacture an annular, one-piece soft plate-like member that covers the entire end face of the coil. In Patent Document 2, the soft plate-like member is manufactured from a soft plastic material. However, manufacturing the annular, one-piece soft plate-like member results in a large amount of raw material being discarded, which increases the manufacturing cost of the soft plate-like member and poses significant environmental problems.

[0007] Therefore, the present invention has been made to solve these conventional problems, and its object is to provide a metal coil end surface protection material that can protect the entire end surface of a metal coil while reducing the amount of raw material waste.

[0008] In order to solve the above problems, one embodiment of the present invention provides a metal coil end surface protection material that protects the end surface of a cylindrical metal coil, and is characterized by comprising a plurality of segmented pieces formed by dividing an annular member that covers the entire end surface of the metal coil into a plurality of pieces along the circumferential direction, and a plurality of connecting members that connect adjacent segmented pieces together in the circumferential direction.

[0009] According to the metal coil end surface protection material of the present invention, it is possible to provide a metal coil end surface protection material that can protect the entire end surface of a metal coil while reducing the amount of raw material waste.

[0010] 5 is a perspective view showing a state in which a metal coil end surface protection material according to a first embodiment of the present invention is arranged on both end surfaces of a wire rod coil as a metal coil. FIG. 6 is a perspective view showing a state in which the end surface protection material shown in FIG. 1 is arranged on both end surfaces of the wire rod coil and then the wire rod coil is bound together with the end surface protection material with binding hoops. FIG. 7 is a plan view showing the end surface protection material shown in FIG. 1 before being arranged on both end surfaces of the wire rod coil. FIG. 8 is a view for explaining a method of cutting out, from raw material, a plurality of segmented pieces constituting the end surface protection material shown in FIG. 1. FIG. 9 is a plan view for explaining an end surface protection material according to a reference example. FIG. 11 is a view for explaining a method of cutting out, from raw material, an annular member constituting the end surface protection material according to the reference example shown in FIG. 5. FIG. 9 compares the amount of raw material waste when an integral annular member constituting the end surface protection material is cut out from raw material and the amount of waste when a plurality of segmented pieces of the annular member constituting the end surface protection material are cut out from raw material, where (a) is a view for explaining the amount of raw material waste when an integral annular member constituting the end surface protection material is cut out from raw material, and (b) is a view for explaining the amount of waste when a plurality of segmented pieces of the annular member constituting the end surface protection material are cut out from raw material. Fig. 10 is a perspective view showing a state in which end surface protective materials for a metal coil according to a second embodiment of the present invention are arranged on both end surfaces of a wire rod coil as a metal coil, and then the wire rod coil is bound together with the end surface protective material with binding hoops. Fig. 11 is a plan view showing the end surface protective material shown in Fig. 8 before being arranged on both end surfaces of the wire rod coil. Fig. 12 is a plan view showing the end surface protective material according to a third embodiment of the present invention before being arranged on both end surfaces of the wire rod coil. Fig. 13 is a view for explaining a state in which the hook interferes with the end surface protective material and the end surface protective material is shifted upward relative to the end surface of the wire rod coil when the wire rod coil is placed on a C-shaped hook and transported, and an end surface protective material composed of an integrated annular member formed wider than the width of the end surface of the wire rod coil is attached to the end surface of the wire rod coil for binding. 12 is a diagram for explaining how, when the wire rod coil is placed on a C-shaped hook and transported, and the end surface protection member shown in FIG. 10 is attached to the end surface of the wire rod coil for binding, the hook comes into contact with the bendable piece formed between the slits of the end surface protection member, causing the bendable piece to bend, and the end surface protection member protects the entire end surface of the wire rod coil without shifting upward relative to the end surface of the wire rod coil. １ Other divided pieces 2 ２ ~2４ and those divided pieces 2 ２ ~2 ４ Notch 5 formed in ２ ~5 ４ and bendable piece 5 ２１ ~5 ４１ 10 is a diagram for explaining how the hook comes into contact with the bendable piece formed between the slits of the end surface protection material and the bendable piece bends.

[0011] Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiments shown below are examples of devices and methods for embodying the technical concept of the present invention, and the technical concept of the present invention is not limited to the materials, shapes, structures, arrangements, etc. of the components in the embodiments described below. Furthermore, the drawings are schematic. Therefore, it should be noted that the relationships and ratios between thicknesses and planar dimensions may differ from the actual ones, and the drawings may also contain portions where the relationships and ratios of dimensions differ from one another.

[0012] (First Embodiment) Fig. 1 shows a state in which metal coil end surface protective materials according to a first embodiment of the present invention are arranged on both end surfaces of a wire rod coil as a metal coil. Fig. 2 also shows a state in which the end surface protective materials shown in Fig. 1 are arranged on both end surfaces of the wire rod coil and then bound together with the end surface protective materials using binding hoops. The wire rod coil 10 as a metal coil shown in Fig. 1 is wound into a coil shape at a hot rolling plant, transported to a warehouse on a pallet for temporary storage, and then supplied to a consumer by transportation means such as a trailer or ship. The wire rod coil 10 is wound into a cylindrical shape and has an end surface 11 at one end in the longitudinal direction and an end surface 12 at the other end in the longitudinal direction.

[0013] Here, when the wire rod coils 10 are placed on a pallet or stacked on a transportation means such as a trailer or a ship, they are handled by a crane, but during this handling, the end faces 11, 12 of the wire rod coils 10 may come into contact with each other and damage the end faces 11, 12 of the wire rod coils 10. Also, when transporting a plurality of wire rod coils 10 by a transportation means such as a trailer or a ship, the end faces 11, 12 of the wire rod coils 10 may come into contact with each other and damage the end faces 11, 12 of the wire rod coils 10. Therefore, in this embodiment, in order to protect both end faces 11, 12 of the wire rod coil 10, after the wire rod is wound into a coil at a hot rolling factory.

[0014] As shown in FIGS. 1 to 3, the end surface protection material 1 is a plurality of (four in this embodiment) divided pieces 2 formed by dividing an annular member 2 that covers the entire end surfaces 11, 12 of a wire coil 10 as a metal coil into a plurality of (four in this embodiment) divided pieces 2 along the circumferential direction. １ , 2 ２ , 2 ３ , 2 ４ The end surface protection member 1 is provided with divided pieces 2 adjacent to each other in the circumferential direction. １ , 2 ２ ;2 ２ , 2 ３ ;2 ３ , 2 ４ ;2 ４ , 2 １ A plurality of (four in this embodiment) connecting members 3 １ , 3 ２ , 3 ３ , 3 ４ It is equipped with:

[0015] Each divided piece 2 １ , 2 ２ , 2 ３ , 2 ４ The material of the wire rod coil 10 may be any material that is softer than the steel material that is the material of the wire rod coil 10 as a metal coil and can protect the wire rod coil 10. １ , 2 ２ , 2 ３ , 2 ４ Each divided piece 2 is made of cardboard.１ , 2 ２ , 2 ３ , 2 ４ The outer diameter of the annular member 2 formed by joining the wire rod coil 10 along the circumferential direction is the same as or slightly larger than the outer diameter of the wire rod coil 10, and the inner diameter of the annular member 2 is the same as or slightly smaller than the inner diameter of the wire rod coil 10. １ , 2 ２ , 2 ３ , 2 ４ is divided into equal sized pieces along the circumferential direction. １ , 2 ２ , 2 ３ , 2 ４ The thickness of each divided piece 2 is determined appropriately depending on the material. １ , 2 ２ , 2 ３ , 2 ４ In the case of cardboard, the thickness is about 5 mm.

[0016] Each divided piece 2 １ , 2 ２ , 2 ３ , 2 ４ When manufacturing the split pieces 2, as shown in FIG. １ , 2 ２ , 2 ３ , 2 ４ Each raw material S is a rectangle that is slightly larger than １ From each divided piece 2 １ , 2 ２ , 2 ３ , 2 ４ At this time, each divided piece 2 １ , 2 ２ , 2 ３ , 2 ４ The waste portion S in contact with the outer periphery of １１ , S １２ , each divided piece 2 １ , 2 ２ , 2 ３ , 2 ４ The waste portion S contacting both divided end faces of １３ , S １４ , and each divided piece 2 １ , 2 ２ , 2 ３ , 2 ４ The waste portion S in contact with the inner circumference of １５Each divided piece 2 is discarded. １ , 2 ２ , 2 ３ , 2 ４ The amount of raw material wasted in the production of １１ ~S １５ In contrast, when the end face protection material 100 is formed of an annular member 101, as in the end face protection material 100 according to the reference example shown in FIG. 5, the amount of raw material waste is as shown in FIG.

[0017] That is, when manufacturing the annular member 101, a square raw material S slightly larger than the annular member 101 is used. １００ At this time, a discarded portion S in contact with the outer periphery of the annular member 101 is cut out. １０１ , S １０２ , S １０３ , S １０４ and a waste portion S in contact with the inner periphery of the annular member 101. １０５ The amount of raw material discarded when manufacturing the annular member 101 is the discarded portion S １０１ ~S １０５ The total amount is the sum of each divided piece 2 １ , 2 ２ , 2 ３ , 2 ４ The waste portion S is the amount of raw materials wasted when manufacturing １１ ~S １５ The sum of these is multiplied by the number of divisions (four), which is the waste portion S, which is the amount of raw material wasted when manufacturing the annular member 101. １０１ ~S １０５ This is less than the total amount of waste materials.

[0018] 7(a) and 7(b), the integral annular member 101 constituting the end face protection material 100 is made from raw material S １００ The amount of raw material wasted when cutting out the end surface protection material 1 from the plurality of (n) divided pieces 2 of the annular member 2 １ ~2 ｎ As shown in FIG. 7( a), an integral annular member 101 is cut out from a raw material S. １００The amount of raw material waste when cutting from (waste portion S １０１ ~S １０５ The total amount A1 of the annular member 101 and the square material having a side length of d is expressed by the following formula (1), where d is the outer diameter of the annular member 101 and w is the width of the annular member 101. ２ −π(d / 2) ２ +π(d / 2−w) ２ …(1)

[0019] On the other hand, as shown in FIG. 7(b), a plurality of (n) divided pieces 2 １ ~2 ｎ The waste amount when cutting out from the raw material (waste portion S １１ ~S １５ The sum of these values ​​multiplied by n times) A2 is expressed by the following formula (2): A2 = [{d sin(360 / n)° × (d / 2-(2 / d-w) cos(360 / n)°)} - {(π(d / 2) ２ ×1 / n)-(π(d / 2-w) ２ ×1 / n)}]×n…(2)

[0020] The purpose of dividing the annular member 2 into a plurality of divided pieces is to reduce the amount of unnecessary parts to be discarded. Therefore, the outer diameter d, width w, and number of divisions n of the annular member 2 are set so that the discard amount A1 expressed by formula (1) is greater than the discard amount A2 expressed by formula (2). Here, the number of divisions n of the annular member is determined by the number of divided pieces 2 １ ~2 ｎ Taking into consideration the workload of laminating the layers, the range of n is set to 3≦n≦8.

[0021] In addition, each connecting member 3 １ , 3 ２ , 3 ３ , 3 ４ is the number of divided pieces 2 adjacent in the circumferential direction. １ , 2 ２ ;2 ２ , 2 ３ ;2 ３ , 2 ４ ;2 ４ , 2 １ In this embodiment, the connecting members 3 are made of adhesive tape. １ , 3 ２ , 3 ３, 3 ４ As shown in FIG. 3, the adhesive tape constituting the adhesive tape is divided into two adjacent divided pieces 2 １ , 2 ２ ;2 ２ , 2 ３ ;2 ３ , 2 ４ ;2 ４ , 2 １ By adhering the adhesive to the surface near the divided end face of each divided piece 2, the divided pieces 2 adjacent in the circumferential direction １ , 2 ２ ;2 ２ , 2 ３ ;2 ３ , 2 ４ ;2 ４ , 2 １ When attaching the end face protection members 1 to both end faces 11, 12 of the wire rod coil 10, first, as shown in Fig. 1, the end face protection members 1 assembled as described above are placed on both end faces 11, 12 of the wire rod coil 10, which is formed by winding wire rods into a coil shape in a hot rolling factory.

[0022] 2 , the wire coil 10 is restrained together with the end protection materials 1 arranged on both end faces 11, 12 by a plurality of (four in this embodiment) bundling hoops 20. Each bundling hoop 20 binds and fastens the end protection materials 1 arranged on the inner circumferential surface, outer circumferential surface, and both end faces 11, 12 of the wire coil 10, thereby restraining the wire coil 10 together with the end protection materials 1. This restrains the wire coil 10, which tends to expand outward due to elastic force, and prevents the wire coil 10 from coming apart. Furthermore, by restraining the end protection materials 1 at the same time as restraining the wire coil 10, the end protection materials 1 are attached in a state where they are pressed against both end faces 11, 12 of the wire coil 10.

[0023] The binding position of each binding hoop 20 in the circumferential direction is determined by the position of the adjacent divided pieces 2 １ , 2 ２ ;2 ２ , 2 ３ ;2 ３ , 2 ４ ;2 ４ , 2 １ Each joining member 3 is attached to the surface in the vicinity of the divided end face of １ , 3２ , 3 ３ , 3 ４ However, the binding position in the circumferential direction of each binding hoop 20 is the same as the position where each connecting member 3 is attached. １ , 3 ２ , 3 ３ , 3 ４ The position where the adhesive is applied is not limited to the same position as the position where the adhesive is applied, but may be any position in the circumferential direction of the wire rod coil 10.

[0024] By attaching the end face protection material 1 to both end faces 11, 12 of the wire coil 10 in this manner, it is possible to prevent the end faces 11, 12 of the wire coil 10 from coming into contact with each other when handling the wire coil 10 with a crane, thereby avoiding the risk of damaging the end faces 11, 12 of the wire coil 10. Furthermore, it is also possible to prevent the end faces 11, 12 of the wire coil 10 from coming into contact with each other when transporting a plurality of wire coils 10 by transportation means such as a trailer or a ship, thereby avoiding the risk of damaging the end faces 11, 12 of the wire coil 10.

[0025] According to the end surface protection material 1 of the first embodiment, the end surface protection material 1 is made up of a plurality of divided pieces 2 formed by dividing an annular member 2 that covers the entire end surfaces 11, 12 of a rod-wire coil 10 as a metal coil into a plurality of pieces along the circumferential direction. １ , 2 ２ , 2 ３ , 2 ４ and adjacent divided pieces 2 in the circumferential direction. １ , 2 ２ ;2 ２ , 2 ３ ;2 ３ , 2 ４ ;2 ４ , 2 １ A plurality of connecting members 3 for connecting the １ , 3 ２ , 3 ３ , 3 ４ As a result, each divided piece 2 １ , 2 ２ , 2 ３ , 2 ４The amount of raw material wasted when manufacturing the annular member 101 is less than the amount of raw material wasted when manufacturing the annular member 102, and the amount of raw material wasted can be reduced to protect the entire end faces 11, 12 of the wire coil 10 as a metal coil.

[0026] Second Embodiment Next, a metal coil end surface protection material according to a second embodiment of the present invention will be described with reference to Fig. 8 and Fig. 9. Fig. 8 is a perspective view showing a state in which the metal coil end surface protection material according to the second embodiment of the present invention is placed on both end surfaces of a wire rod coil as a metal coil, and the wire rod coil is then bound together with the end surface protection material using binding hoops. Fig. 9 is a plan view of the end surface protection material shown in Fig. 8 before being placed on both end surfaces of the wire rod coil.

[0027] The end surface protective material 1 for a metal coil according to the second embodiment of the present invention shown in FIGS. 8 and 9 is, like the end surface protective material 1 for a metal coil according to the first embodiment of the present invention shown in FIGS. 1 to 3, made up of a plurality of (four in this embodiment) divided pieces 2 (2) formed by dividing an annular member 2 that covers the entire end surfaces 11, 12 of a rod-wire coil 10 as a metal coil into a plurality of (four in this embodiment) divided pieces 2 (2) along the circumferential direction. １ , 2 ２ , 2 ３ , 2 ４ The end surface protection member 1 is provided with divided pieces 2 adjacent to each other in the circumferential direction. １ , 2 ２ ;2 ２ , 2 ３ ;2 ３ , 2 ４ ;2 ４ , 2 １ A plurality of (four in this embodiment) connecting members 3 １ , 3 ２ , 3 ３ , 3 ４ It is equipped with:

[0028] Each divided piece 2 １ , 2 ２ , 2 ３ , 2 ４ The material of the wire rod coil 10 may be any material that is softer than the steel material that is the material of the wire rod coil 10 as a metal coil and can protect the wire rod coil 10. １ , 2 ２ , 2３ , 2 ４ Each divided piece 2 is made of cardboard. １ , 2 ２ , 2 ３ , 2 ４ The outer diameter of the annular member 2 formed by joining the wire rod coil 10 along the circumferential direction is the same as or slightly larger than the outer diameter of the wire rod coil 10, and the inner diameter of the annular member 2 is the same as or slightly smaller than the inner diameter of the wire rod coil 10. １ , 2 ２ , 2 ３ , 2 ４ is divided into equal sized pieces along the circumferential direction. １ , 2 ２ , 2 ３ , 2 ４ The thickness of each divided piece 2 is determined appropriately depending on the material. １ , 2 ２ , 2 ３ , 2 ４ In the case of cardboard, the thickness is about 5 mm.

[0029] In addition, each connecting member 3 １ , 3 ２ , 3 ３ , 3 ４ is the number of divided pieces 2 adjacent in the circumferential direction. １ , 2 ２ ;2 ２ , 2 ３ ;2 ３ , 2 ４ ;2 ４ , 2 １ In this embodiment, the connecting members 3 are made of adhesive tape. Examples of adhesive tape include gum tape and cellophane tape. １ , 3 ２ , 3 ３ , 3 ４ As shown in FIG. 9, the adhesive tape constituting the adhesive tape is divided into two adjacent divided pieces 2 １ , 2 ２ ;2 ２ , 2 ３ ;2 ３ , 2 ４ ;2 ４ , 2 １By adhering the adhesive to the surface near the divided end face of each divided piece 2, the divided pieces 2 adjacent in the circumferential direction １ , 2 ２ ;2 ２ , 2 ３ ;2 ３ , 2 ４ ;2 ４ , 2 １ can be combined with each other.

[0030] On the other hand, unlike the end face protection material 1 according to the first embodiment shown in FIGS. 1 to 3, the end face protection material 1 does not include ear members 4 that cover the outer and inner corners of the end faces 11 and 12 of the wire rod coil 10, which come into contact with the binding hoop 20 that binds the wire rod coil 10 as a metal coil. １ , 4 ２ , 4 ３ , 4 ４ In this embodiment, as shown in FIG. 8 , the wire coil 10 is bound by a plurality of (four in this embodiment) bundling hoops 20 together with the end surface protection members 1 disposed on both end surfaces 11 and 12, so that the end surface protection member 1 is bound by a plurality of (four) ear members 4. １ , 4 ２ , 4 ３ , 4 ４ It is equipped with:

[0031] Each ear member 4 １ , 4 ２ , 4 ３ , 4 ４ The material of the wire rod coil 10 may be softer than the steel material used as the metal coil and may be a material that can protect the outer and inner corners of the end faces 11 and 12 of the wire rod coil 10. １ , 2 ２ , 2 ３ , 2 ４ In this way, the ear members 4 are made of cardboard, and cover the outer and inner corners of the end faces 11 and 12 of the wire rod coil 10, which come into contact with the bundling hoops 20 that bind the wire rod coil 10. １ , 4 ２ , 4 ３ , 4 ４As a result, when bundling the wire coil 10 with the bundling hoop 20, the bundling hoop 20 does not come into contact with the outer circumferential corners and inner circumferential corners of the end faces 11 and 12 of the wire coil 10, and the ear members 4 １ , 4 ２ , 4 ３ , 4 ４ Therefore, damage to the outer and inner corners of the end faces 11 and 12 of the wire rod coil 10 due to contact with the bundling hoops 20 can be avoided.

[0032] In particular, when the metal coil is a wire rod coil 10 as in this embodiment, the elastic force of the wire rods that tends to expand outward is large, and it is necessary to increase the restraining force of the binding hoop 20. If the restraining force of the wire rod coil 10 by the binding hoop 20 is increased, the pressing force on the outer and inner corners of the end faces 11, 12 of the wire rod coil 10 that come into contact with the binding hoop 20 when binding the wire rod coil 10 with the binding hoop 20 increases, and the outer and inner corners are likely to be damaged. For this reason, when the metal coil is a wire rod coil 10, the ear members 4 １ , 4 ２ , 4 ３ , 4 ４ This has the great advantage of preventing the binding hoop 20 from coming into contact with the outer and inner corners of the end faces 11 and 12 of the wire rod coil 10.

[0033] In addition, each ear member 4 １ , 4 ２ , 4 ３ , 4 ４ In this embodiment, as shown in FIGS. 8 and 9, the circumferential positions of the divided pieces 2 １ , 2 ２ ;2 ２ , 2 ３ ;2 ３ , 2 ４ ;2 ４ , 2 １ Each joining member 3 is attached to the surface in the vicinity of the divided end face of １ , 3 ２ , 3 ３ , 3 ４ The binding position of each binding hoop 20 in the circumferential direction is determined by the position of each connecting member 3 as described later. １ , 3２ , 3 ３ , 3 ４ This is because the binding hoops 20 come into contact with the outer circumferential corners and inner circumferential corners of the end faces 11, 12 of the wire rod coil 10 at the same circumferential binding positions as those of the end faces 11, 12 of the wire rod coil 10. When attaching the end face protection members 1 to both end faces 11, 12 of the wire rod coil 10, first, as shown in Fig. 1, the end face protection members 1 assembled as described above are placed on both end faces 11, 12 of the wire rod coil 10 in which the wire rod is wound into a coil shape in a hot rolling factory.

[0034] Next, as shown in Fig. 8, the wire coil 10 is bound together with the end protection materials 1 arranged on both end faces 11, 12 by a plurality of binding hoops 20 (four in this embodiment). Each binding hoop 20 binds the end protection materials 1 arranged on the inner circumferential surface, outer circumferential surface and both end faces 11, 12 of the wire coil 10 so as to tighten, thereby binding the wire coil 10 together with the end protection materials 1. This binds the wire coil 10, which tends to bulge outward due to elastic force, and prevents the wire coil 10 from coming apart. Furthermore, by binding the wire coil 10 and the end protection materials 1 at the same time using the binding hoops 20, the end protection materials 1 are attached in a state where they are pressed against both end faces 11, 12 of the wire coil 10. At this time, each connecting member 3 １ , 3 ２ , 3 ３ , 3 ４ Each ear member 4 arranged on １ , 4 ２ , 4 ３ , 4 ４ The binding hoops 20 are used to bind the respective connecting members 3 １ , 3 ２ , 3 ３ , 3 ４ and each divided piece 2 １ , 2 ２ , 2 ３ , 2 ４ Each ear member 4 is held in a pressed state. １ , 4 ２ , 4 ３ , 4 ４ The connecting members 3 are attached in advance with adhesive tape (not shown). １ , 3 ２ , 3３ , 3 ４ and each divided piece 2 １ , 2 ２ , 2 ３ , 2 ４ It may be attached to the

[0035] By attaching the end face protection material 1 to both end faces 11, 12 of the wire rod coil 10 in this way, the end faces 11, 12 of the wire rod coil 10 can be prevented from coming into contact with each other when handling the wire rod coil 10 with a crane, thereby avoiding the risk of damaging the end faces 11, 12 of the wire rod coil 10. Also, when transporting a plurality of wire rod coils 10 by transportation means such as a trailer or a ship, the end faces 11, 12 of the wire rod coil 10 can be prevented from coming into contact with each other, thereby avoiding the risk of damaging the end faces 11, 12 of the wire rod coil 10. Note that the circumferential binding position of each binding hoop 20 is determined by the distance between the divided pieces 2 adjacent in the circumferential direction. １ , 2 ２ ;2 ２ , 2 ３ ;2 ３ , 2 ４ ;2 ４ , 2 １ Each joining member 3 is attached to the surface in the vicinity of the divided end face of １ , 3 ２ , 3 ３ , 3 ４ However, the binding position in the circumferential direction of each binding hoop 20 is the same as the position where each connecting member 3 is attached. １ , 3 ２ , 3 ３ , 3 ４ The position where the adhesive is applied is not limited to the same position as the position where the adhesive is applied, but may be any position in the circumferential direction of the wire rod coil 10.

[0036] According to the end surface protection material 1 of the second embodiment, the end surface protection material 1 is made up of a plurality of divided pieces 2 formed by dividing an annular member 2 that covers the entire end surfaces 11, 12 of a rod-wire coil 10 as a metal coil into a plurality of pieces along the circumferential direction. １ , 2 ２ , 2 ３ , 2 ４ and adjacent divided pieces 2 in the circumferential direction. １ , 2 ２ ;2 ２ , 2３ ;2 ３ , 2 ４ ;2 ４ , 2 １ A plurality of connecting members 3 for connecting the １ , 3 ２ , 3 ３ , 3 ４ As a result, each divided piece 2 １ , 2 ２ , 2 ３ , 2 ４ The amount of raw material wasted when manufacturing the annular member 101 is less than the amount of raw material wasted when manufacturing the annular member 102, and the amount of raw material wasted can be reduced to protect the entire end faces 11, 12 of the wire coil 10 as a metal coil.

[0037] Furthermore, according to the end surface protection material 1 of the second embodiment, the end surface protection material 1 includes ear members 4 that cover the outer and inner corners of the end surfaces 11 and 12 of the wire rod coil 10, which come into contact with the bundling hoop 20 that binds the wire rod coil 10 as a metal coil. １ , 4 ２ , 4 ３ , 4 ４ This makes it possible to prevent damage to the outer and inner corners of the end faces 11 and 12 of the wire rod coil 10 due to contact with the bundling hoops 20.

[0038] (Third embodiment) Next, an end surface protection material for a metal coil according to a third embodiment of the present invention will be described with reference to Fig. 10. Fig. 10 is a plan view of an end surface protection material according to the third embodiment of the present invention before being placed on both end surfaces of a rod / wire coil. The end surface protection material for a metal coil 1 according to the third embodiment of the present invention shown in Fig. 10 has the same basic configuration as the end surface protection material for a metal coil 1 shown in Figs. 8 and 9, but has a plurality of divided pieces 2 １ , 2 ２ , 2 ３ , 2 ４ Each of the divided pieces 2 １ , 2 ２ , 2 ３ , 2 ４ A pair of notches 5 extending radially outward from the inner peripheral edge of the １ , 5 １ , 5２ , 5 ２ , 5 ３ , 5 ３ , 5 ４ , 5 ４ 8 and 9 in that a pair of notches 5 １ , 5 １ , 5 ２ , 5 ２ , 5 ３ , 5 ３ , 5 ４ , 5 ４ Between them, a bendable piece 5 １１ , 5 ２１ , 5 ３１ , 5 ４１ A pair of notches 5 are formed. １ , 5 １ , 5 ２ , 5 ２ , 5 ３ , 5 ３ , 5 ４ , 5 ４ The predetermined interval W between the hooks is slightly larger than the width of the hooks F described later.

[0039] The width W of the end surface protection member 1 made up of the annular member 2 １ (See FIG. 12) is a width W of the end faces 11 and 12 of the wire rod coil 10 in order to reliably protect the end faces 11 and 12 (only the end face 11 is shown in FIG. 12). １０ However, the outer diameter of the end surface protection member 1 formed by the annular member 2 is equal to the outer diameter of the end surfaces 11 and 12 of the wire rod coil 10. １ ~5 ４ The height (length) H of the end surface protection material 1 is １ and the width W of the end faces 11 and 12 of the wire rod coil 10 １０ is roughly equal to the difference between

[0040] In FIG. 11, a wire coil 10 is placed on a C-shaped hook F and conveyed. The width W of the end face 11 of the wire coil 10 is １０1 shows how, when an end face protection material 102 consisting of an integrated annular member 103 formed wider than the end face 11 of the rod-wire coil 10 is attached to the end face 11 of the rod-wire coil 10 and bound, the hook F interferes with the end face protection material 102, causing the end face protection material 102 to shift upward relative to the end face 11 of the rod-wire coil 10.

[0041] As shown in FIG. 11, the wire coil 10 is placed on a C-shaped hook F and conveyed. The width W of the end face 11 of the wire coil 10 is １０ When the end surface protection member 102, which is made up of an integral annular member 103 formed wider than the end surface 11 of the rod / wire coil 10, is attached to the end surface 11 of the rod / wire coil 10 for binding, the hook F interferes with the end surface protection member 102. This is because, although the outer diameter of the end surface protection member 102 made up of the annular member 103 is equal to the outer diameter of the rod / wire coil 10, the width W of the end surface protection member 102 １０２ is the width W of the end surface 11 of the wire rod coil 10 １０ This is because the hooks F are formed wider than the end surface 11 of the wire rod coil 10, and the hooks F penetrate into the inner periphery of the wire rod coil 10. As a result, the end surface protection material 102 shifts upward relative to the end surface 11 of the wire rod coil 10, exposing part of the end surface 11 of the wire rod coil 10 and making it impossible to protect the entire end surface 11 of the wire rod coil 10. In the case of the coil packaging materials shown in Patent Documents 1 and 2, as in the case shown in Fig. 11 , when the coil is placed on a C-shaped hook for transport, and the packaging material is attached and bundled, the hooks interfere with the packaging material, causing a misalignment between the coil end surface to be protected and the packaging material, and there is a risk that part of the coil end surface will be exposed after bundled.

[0042] In contrast, in FIG. 12, when the wire rod coil 10 is placed on a C-shaped hook F and transported, and the end surface protection member 1 shown in FIG. 10 is attached to the end surface 11 of the wire rod coil 10 for binding, the hook F is inserted into the notch 5 of the end surface protection member 1. １ , 5 １ The bendable piece 5 formed between １１ The bendable piece 5 １１ 10, the end surface protection material 1 protects the entire end surface 11 of the wire rod coil 10 without shifting upward relative to the end surface 11 of the wire rod coil 10.

[0043] As shown in Fig. 12, when the wire rod coil 10 is placed on a C-shaped hook F and transported, and the end surface protection member 1 shown in Fig. 10 is attached to the end surface 11 of the wire rod coil 10 for bundling, the hook F enters the inner periphery of the wire rod coil 10. Then, as shown in Figs. 12 and 13, the hook F enters the notch 5 of the end surface protection member 1. １ , 5 １ The bendable piece 5 formed between １１ bendable piece 5 １１ As a result, the width W of the end surface protection material 1 is １ is the width W of the end surface 11 of the wire rod coil 10 １０ Even if the width is wider than the end surface 11 of the wire rod coil 10, the end surface protection member 1 does not shift upward relative to the end surface 11 of the wire rod coil 10, and the entire end surface 11 of the wire rod coil 10 is protected.

[0044] 12 and 13, the hook F is inserted into the notch 5 of the end surface protection material 1. １ , 5 １ The bendable piece 5 formed between １１ bendable piece 5 １１ However, when the hook F enters the inner periphery of the wire coil 10, the hook F is bent into the notch 5 of the end face protection material 1. ２ , 5 ２ , 5 ３ , 5 ３ , 5 ４ , 5 ４ The bendable piece 5 formed between ２１ , 5 ３１ , 5 ４１ It also comes into contact with the bendable piece 55 ２１ , 5 ３１ , 5 ４１ In this way, according to the end surface protection material 1 for a metal coil according to the third embodiment shown in FIG. 10, when the rod-wire coil 10 is placed on the hook F, the pair of notches 5 １ , 5 １ ~5 ４ , 5 ４ By using the end surface protection material 1 having the above-mentioned structure, it is possible to cover the entire end surfaces 11, 12 of the wire coil 10 with the end surface protection material 1 after bundling with the bundling hoop 20 (see Figure 9).

[0045] Although the embodiment of the present invention has been described above, the present invention is not limited to this and various modifications and improvements can be made. １ , 2 ２ , 2 ３ , 2 ４ The number of divisions is not limited to four, but may be any number. １ , 2 ２ , 2 ３ , 2 ４ The material of the wire rod coil 10 may be any material that is softer than the steel material that is the material of the wire rod coil 10 as a metal coil and can protect the wire rod coil 10, and is not limited to cardboard, but may also be plastic, cloth, etc. １ , 2 ２ , 2 ３ , 2 ４ The wire rod coil 10 does not necessarily have to be divided into equal sizes along the circumferential direction thereof.

[0046] In addition, each connecting member 3 １ , 3 ２ , 3 ３ , 3 ４ is the number of divided pieces 2 adjacent in the circumferential direction. １ , 2 ２ ;2 ２ , 2 ３ ;2 ３ , 2 ４ ;2 ４ , 2 １ As long as they can be joined together, materials other than adhesive tape may be used. １ , 4 ２ , 4 ３ , 4 ４ The circumferential arrangement positions of the divided pieces 2 may correspond to the circumferential binding positions of the binding hoops 20. １ , 2 ２ ;2 ２ , 2 ３ ;2 ３ , 2 ４ ;2 ４ , 2 １ Each joining member 3 is attached to the surface in the vicinity of the divided end face of １ , 3 ２ , 3 ３ , 3４ Not limited to above.

[0047] In addition, each ear member 4 １ , 4 ２ , 4 ３ , 4 ４ The material of the wire rod coil 10 may be any material that is softer than the steel material used for the wire rod coil 10 as a metal coil and can protect the outer and inner corners of the end faces 11 and 12 of the wire rod coil 10, and is not limited to cardboard, but may also be plastic, cloth, etc. １ , 4 ２ , 4 ３ , 4 ４ is the divided piece 2 １ , 2 ２ , 2 ３ , 2 ４ It is composed of separate parts, but the split piece 2 １ , 2 ２ , 2 ３ , 2 ４ The metal coil to which the end surface protection material 1 is applied may be a cylindrical metal coil other than the wire coil 10, such as a hot-rolled steel sheet coil or a cold-rolled steel sheet coil.

[0048] In addition, in the end surface protection material 1 of the metal coil shown in FIG. 10, a plurality of divided pieces 2 １ ~2 ４ Each of the pair of notches 5 １ , 5 １ ~5 ４ , 5 ４ However, the present invention is not limited to this, and a plurality of divided pieces 2 １ ~2 ４ In the end surface protection material 1 for a metal coil shown in FIG. １ ~2 ４ Alternatively, a pair of notches may be formed in any one of the divided pieces.

[0049] 1 Metal coil end surface protection material 2 Annular member 2 １ ~2 ４ Split piece 3 １ ~3 ４ Connecting member 4１ ~4 ４ Ear member 5 １ ~5 ４ Notch 5 １１ ~5 ４１ Bendable piece 10: Wire rod coil (metal coil) 11: End surface 12: End surface 20: Binding hoop F: Hook S １ Raw materials S １１ ~S １５ Discarded part

Claims

1. A metal coil end protection material for protecting the end faces of a cylindrical metal coil, comprising a plurality of segmented pieces formed by dividing an annular member that covers the entire end face of the metal coil into a plurality of pieces, and a plurality of connecting members that connect adjacent segmented pieces in the circumferential direction.

2. The end face protection material for a metal coil as described in claim 1, characterized in that it is provided with ear members which cover the outer and inner corners of the end face of the metal coil with which the binding hoop that binds the metal coil comes into contact.

3. The end surface protection material for a metal coil according to claim 1 or 2, characterized in that the metal coil is a bar wire coil.

4. A metal coil end surface protection material as described in any one of claims 1 to 3, characterized in that at least one of the multiple segments has a pair of notches formed in it, the notches being spaced a predetermined distance from each other and extending radially outward from the inner peripheral edge of the segment.

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