Metal coil end protection material

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

[Technical Field]

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

[0002] The wire rod coils produced at steelworks are wound into coils at a hot rolling mill, transported on pallets to a warehouse for temporary storage, and then supplied to consumers by transportation means such as trailers or ships. When the wire rod coils are placed on a pallet or stacked on a transport means such as a trailer or a ship, they are handled by a crane, but during this handling, the end faces of the wire rod coils may come into contact with each other and be damaged.Furthermore, when transporting a plurality of wire rod coils by a transport means such as a trailer or a ship, the end faces of the wire rod coils may come into contact with each other and be damaged. Therefore, in the past, in order to protect the end faces of the wire rod coil, after the wire rod is wound into a coil in a hot rolling factory, an end face protection material is attached to the end faces of the wire rod coil.

[0003] On the other hand, as a packaging device for metal coils, such as steel sheet coils, intended to protect the metal coils, the device shown in Patent Document 1 has been proposed. The method of packaging metal coils shown in Patent Document 1 involves attaching a protector that protects the corners between the outer edge and end face of a steel sheet coil directly 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 packing papers. According to the packaging method for metal coils disclosed in Patent Document 1, when packaging metal coils, damage to the metal coils and packaging paper during transportation can be prevented.

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

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-327289 [Patent Document 2] Japanese Utility Model Application Publication No. 2-87509 Summary of the Invention [Problem to be solved by the invention]

[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. That is, in the case of the metal coil packaging method shown in Patent Document 1, only the corners between the outer 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 case of the coil packaging material shown in Patent Document 2, the soft plate member can protect the entire end face (side face) of the coil. However, it is necessary to manufacture an annular, one-piece soft plate member that covers the entire end face of the coil. In Patent Document 2, the soft plate member is manufactured from a soft plastic material, but when manufacturing the annular, one-piece soft plate member, a large amount of raw material is discarded, which increases the manufacturing cost of the soft plate 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. [Means for solving the problem]

[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. [Effects of the Invention]

[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. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a perspective view showing a state in which a metal coil end surface protection member according to a first embodiment of the present invention is arranged on both end surfaces of a wire rod coil as a metal coil. [Figure 2] 2 is a perspective view showing a state in which the end surface protection members shown in FIG. 1 are placed on both end surfaces of a rod / wire coil and then the rod / wire coil is bound together with the end surface protection members by binding hoops. FIG. [Figure 3] 2 is a plan view of the end surface protection members shown in FIG. 1 before they are placed on both end surfaces of the rod and wire coil. FIG. [Figure 4] 2 is a diagram for explaining a method for cutting out a plurality of divided pieces that constitute the edge surface protection material shown in FIG. 1 from a raw material. FIG. [Figure 5] FIG. 10 is a plan view illustrating an end face protection material according to a reference example. [Figure 6] 6 is a diagram for explaining a method for cutting out an annular member constituting the end face protection member according to the reference example shown in FIG. 5 from a raw material. FIG. [Figure 7] This figure compares the amount of raw material wasted when cutting out an integral annular member that constitutes the end face protection material from the raw material, with the amount of raw material wasted when cutting out multiple divided pieces of the annular member that constitutes the end face protection material from the raw material. (a) is a diagram for explaining the amount of raw material wasted when cutting out an integral annular member that constitutes the end face protection material from the raw material, and (b) is a diagram for explaining the amount of raw material wasted when cutting out multiple divided pieces of the annular member that constitutes the end face protection material from the raw material. [Figure 8] FIG. 10 is an oblique view showing a state in which a metal coil end surface protection material according to a second embodiment of the present invention is placed 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 protection material using binding hoops. [Figure 9] 9 is a plan view of the end surface protection members shown in FIG. 8 before being placed on both end surfaces of the rod and wire coil. [Figure 10] FIG. 10 is a plan view of an end surface protection member according to a third embodiment of the present invention before being placed on both end surfaces of a rod or wire coil. [Figure 11] FIG. 10 is a diagram illustrating how, when a wire rod coil is placed on a C-shaped hook and transported, and an end surface protection material made 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 to bind it, the hook interferes with the end surface protection material, causing the end surface protection material to shift upward relative to the end surface of the wire rod coil. [Figure 12] 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 pieces formed between the slits of the end surface protection member, causing the bendable pieces 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. However, Fig. 12 does not show the segments 22 to 24 other than segment 21, the slits 52 to 54 formed in these segments 22 to 24, and the bendable pieces 521 to 541. [Figure 13] 10A and 10B are diagrams illustrating how a hook comes into contact with a bendable piece formed between slits in the end surface protection material and the bendable piece bends. DETAILED DESCRIPTION OF THE INVENTION

[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 following embodiments in terms of the materials, shapes, structures, arrangements, etc. of the components. In addition, the drawings are schematic, and therefore it should be noted that the relationship between thickness and planar dimensions, ratios, etc. may differ from the actual relationship, and the drawings may also contain parts where the relationship and ratio of dimensions differ from each other.

[0012] (First embodiment) Fig. 1 shows a state in which a metal coil end surface protection material according to a first embodiment of the present invention is disposed on both end surfaces of a wire rod coil as a metal coil, and Fig. 2 shows a state in which the end surface protection material shown in Fig. 1 is disposed on both end surfaces of the wire rod coil and then the wire rod coil is bound together with the end surface protection material by binding hoops. 1 is wound into a coil shape 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 ship. The wire coil 10 is wound into a cylindrical shape and has an end face 11 at one end in the longitudinal direction and an end face 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 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. Furthermore, 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 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, end face protection materials 1 are attached to both end faces 11, 12 of the wire rod coil 10.

[0014] 1 to 3, the end face protection material 1 includes a plurality of (four in this embodiment) segment pieces 21, 22, 23, 24 formed by dividing an annular member 2 that covers the entire end faces 11, 12 of a rod / wire coil 10 as a metal coil into a plurality of (four in this embodiment) segment pieces along the circumferential direction. The end face protection material 1 also includes a plurality of (four in this embodiment) connecting members 31, 32, 33, 34 that connect the segment pieces 21, 22; 22, 23; 23, 24; 24, 21 that are adjacent in the circumferential direction.

[0015] The material of each of the segments 21, 22, 23, and 24 may be any material that is softer than the steel material of the wire rod coil 10 as a metal coil and can protect the wire rod coil 10. In this embodiment, the segments 21, 22, 23, and 24 are made of cardboard. The outer diameter of the annular member 2, which circumferentially connects the segments 21, 22, 23, and 24, 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. The segments 21, 22, 23, and 24 are divided into segments of equal size along the circumferential direction. The thickness of each segment 21, 22, 23, and 24 is determined appropriately depending on the material, but is approximately 5 mm when the segments 21, 22, 23, and 24 are made of cardboard as in this embodiment.

[0016] 4, the divided pieces 21, 22, 23, 24 are cut out from rectangular raw material S1 that is slightly larger than the divided pieces 21, 22, 23, 24. At this time, a waste portion S in contact with the outer periphery of each divided piece 21, 22, 23, 24 is removed. 11 ,S 12 , the waste portions S in contact with both end faces of each of the divided pieces 21, 22, 23, 24 13 ,S 14 , and the waste portion S in contact with the inner periphery of each divided piece 21, 22, 23, 24.15 is discarded. The amount of raw material wasted when manufacturing each of the divided pieces 21, 22, 23, and 24 is the waste portion S 11 ~S 15 The total amount of waste is multiplied by the number of divisions (four). In contrast, when the edge protection material 100 is formed of an annular member 101, as in the edge protection material 100 according to the reference example shown in FIG. 5, the amount of waste raw material 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 wasted when manufacturing the annular member 101 is the waste portion S 101 ~S 105 The total amount is the sum of the above. The waste portion S is the amount of raw material wasted when manufacturing each of the divided pieces 21, 22, 23, and 24. 11 ~S 15 The sum of these is multiplied by the number of divisions (four), which is the waste portion S 101 ~S 105 This is less than the total amount of waste materials.

[0018] 7(a) and (b), the integral annular member 101 constituting the edge surface protection material 100 is made of 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 21 to 22 of the annular member 2. n This will be explained by comparing the amount of waste when cutting out the material. As shown in FIG. 7(a), the integral annular member 101 is made of raw material S 100 The amount of raw material waste when cutting from (waste portion S 101 ~S 105The total amount A1 of the above is expressed by the following formula (1) because the annular member 101 is cut out from a square material with a side length of d, where d is the outer diameter of the annular member 101 and w is the width of the annular member 101. A1=d 2 -π(d / 2) 2 +π(d / 2-w) 2 …(1)

[0019] On the other hand, as shown in FIG. 7(b), a plurality (n pieces) of divided pieces 21 to 2 n The waste amount when cutting out from raw materials (waste portion S 11 ~S 15 The quantity A2 obtained by multiplying the sum of the above by n times is expressed by the following formula (2). A2=[{d·sin(360 / n)°×(d / 2-(2 / dw)·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 multiple pieces is to reduce the amount of unnecessary parts that are discarded. Therefore, the outer diameter d and width w of the annular member 2, as well as the number of divisions n, are set so that the discard amount A1 expressed by equation (1) is greater than the discard amount A2 expressed by equation (2). Here, the number of divisions n of the annular member is divided into the division pieces 21 to 2 n Taking into account the workload of gluing the pieces together, the range of n is set to 3≦n≦8.

[0021] Each joining member 31, 32, 33, 34 joins the circumferentially adjacent segments 21, 22; 22, 23; 23, 24; 24, 21 together, and in this embodiment is made of adhesive tape. The adhesive tape constituting each joining member 31, 32, 33, 34 is attached to the surface near the divided end faces of the circumferentially adjacent segments 21, 22; 22, 23; 23, 24; 24, 21, as shown in Figure 3, thereby joining the circumferentially adjacent segments 21, 22; 22, 23; 23, 24; 24, 21 together. When attaching the end face protection material 1 to each of the end faces 11, 12 of the wire rod coil 10, first, as shown in FIG. 1, the end face protection material 1 assembled as described above is placed on each of the end faces 11, 12 of the wire rod coil 10, which is formed by winding wire rod into a coil shape in a hot rolling factory.

[0022] 2, the wire coil 10 is bound together with the end protection materials 1 arranged on both end faces 11, 12 by a plurality of (four in this embodiment) binding hoops 20. 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 restrains the wire coil 10, which tends to expand outward due to elastic force, and prevents the wire coil 10 from coming apart. In addition, by restraining the end face protection member 1 at the same time as restraining the wire coil 10, the end face protection member 1 is attached in a state where it is pressed against both end faces 11, 12 of the wire coil 10.

[0023] The circumferential binding position of each binding hoop 20 is the same as the affixing position of each joining member 31, 32, 33, 34 affixed to the surface near the divided end face of the circumferentially adjacent divided pieces 21, 22; 22, 23; 23, 24; 24, 21. However, the circumferential binding position of each binding hoop 20 is not limited to the same position as the affixing position of each joining member 31, 32, 33, 34, and may be any position in the circumferential direction of the wire rod coil 10.

[0024] In this way, by attaching the end face protection material 1 to both end faces 11, 12 of the wire coil 10, 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 for a metal coil of the first embodiment, the end surface protection material 1 comprises a plurality of divided pieces 21, 22, 23, 24 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, and a plurality of connecting members 31, 32, 33, 34 that connect adjacent divided pieces 21, 22; 22, 23; 23, 24; 24, 21 together in the circumferential direction. As a result, the amount of raw material wasted when manufacturing each of the divided pieces 21, 22, 23, and 24 is less than the amount of raw material wasted when manufacturing the annular member 101, and the amount of raw material wasted is reduced, thereby protecting the entire end faces 11 and 12 of the wire coil 10 as a metal coil.

[0026] (Second embodiment) Next, an end surface protection material for a metal coil 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 end surface protection material for a metal coil 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] 8 and 9, similar to the end surface protection material 1 for a metal coil according to the first embodiment of the present invention shown in Figures 1 to 3, the end surface protection material 1 for a metal coil according to the second embodiment of the present invention includes a plurality of (four in this embodiment) segment pieces 21, 22, 23, 24 obtained 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) segment pieces 21, 22, 23, 24 along the circumferential direction. The end surface protection material 1 also includes a plurality of (four in this embodiment) connecting members 31, 32, 33, 34 that connect the segment pieces 21, 22; 22, 23; 23, 24; 24, 21 that are adjacent in the circumferential direction.

[0028] The material of each of the segments 21, 22, 23, and 24 may be any material that is softer than the steel material of the wire rod coil 10 as a metal coil and can protect the wire rod coil 10. In this embodiment, the segments 21, 22, 23, and 24 are made of cardboard. The outer diameter of the annular member 2, which circumferentially connects the segments 21, 22, 23, and 24, 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. The segments 21, 22, 23, and 24 are divided into segments of equal size along the circumferential direction. The thickness of each segment 21, 22, 23, and 24 is determined appropriately depending on the material, but is approximately 5 mm when the segments 21, 22, 23, and 24 are made of cardboard as in this embodiment.

[0029] Each connecting member 31, 32, 33, 34 connects the circumferentially adjacent segments 21, 22; 22, 23; 23, 24; 24, 21 together, and in this embodiment, is made of adhesive tape. Examples of adhesive tape include gummed tape and cellophane tape. As shown in FIG. 9 , the adhesive tape constituting each connecting member 31, 32, 33, 34 can be attached to the surfaces near the divided end faces of the circumferentially adjacent segments 21, 22; 22, 23; 23, 24; 24, 21, thereby connecting the circumferentially adjacent segments 21, 22; 22, 23; 23, 24; 24, 21 together.

[0030] 1 to 3, the end face protection material 1 includes ear members 41, 42, 43, and 44 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 hoops 20 that bind the wire rod coil 10 as a metal coil. In this embodiment, as shown in FIG. 8, the wire rod coil 10 is restrained together with the end face protection materials 1 arranged on both end faces 11 and 12 by a plurality of binding hoops 20 (four in this embodiment). Therefore, the end face protection material 1 includes a plurality of (four) ear members 41, 42, 43, and 44.

[0031] The material of each of the ear members 41, 42, 43, and 44 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 that can protect the outer and inner corners of the end faces 11 and 12 of the wire rod coil 10, but in this embodiment, each of the divided pieces 21, 22, 23, and 24 is made of cardboard. In this way, the ear members 41, 42, 43, and 44 are provided to cover the outer peripheral corners and inner peripheral corners of the end faces 11 and 12 of the wire rod coil 10 with which the binding hoops 20 that bind the wire rod coil 10 come into contact. As a result, the ear members 41, 42, 43, and 44 prevent the binding hoops 20 from contacting the outer peripheral corners and inner peripheral corners of the end faces 11 and 12 of the wire rod coil 10 when binding the wire rod coil 10 with the binding hoops 20. This makes it possible to avoid damage to the outer peripheral corners and inner peripheral corners of the end faces 11 and 12 of the wire rod coil 10 due to contact with the binding hoops 20.

[0032] In particular, when the metal coil is a wire rod coil 10 as in this embodiment, the elastic force of the wire rods tending to expand outward is large, and the binding force of the binding hoops 20 needs to be increased. If the binding force of the wire rod coil 10 by the binding hoops 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 hoops 20 when binding the wire rod coil 10 with the binding hoops 20 increases, making the outer and inner corners more likely to be damaged. Therefore, when the metal coil is a wire rod coil 10, the ear members 41, 42, 43, 44 have a significant advantage in preventing the binding hoops 20 from coming into contact with the outer and inner corners of the end faces 11, 12 of the wire rod coil 10.

[0033] In this embodiment, the circumferential arrangement positions of the ear members 41, 42, 43, 44 are on the respective connecting members 31, 32, 33, 34 attached to the surfaces near the divided end faces of the circumferentially adjacent divided pieces 21, 22; 22, 23; 23, 24; 24, 21, as shown in Figures 8 and 9. The circumferential binding positions of the respective binding hoops 20 are the same positions as the affixing positions of the respective connecting members 31, 32, 33, 34, as will be described later, because the binding hoops 20 come into contact with the outer and inner corners of the end faces 11, 12 of the bar wire coil 10 at those circumferential binding positions. When attaching the end face protection material 1 to each of the end faces 11, 12 of the wire rod coil 10, first, as shown in FIG. 1, the end face protection material 1 assembled as described above is placed on each of the end faces 11, 12 of the wire rod coil 10, which is formed by winding wire rod into a coil shape in a hot rolling factory.

[0034] 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 (four in this embodiment) binding hoops 20. 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 restrains the wire rod coil 10, which tends to expand outward due to elastic force, and prevents the wire rod coil 10 from coming apart. Furthermore, by restraining the wire rod coil 10 with the binding hoops 20 and at the same time restraining the end surface protection member 1, the end surface protection member 1 is attached while being pressed against both end surfaces 11, 12 of the wire rod coil 10. At this time, the ear members 41, 42, 43, 44 arranged on the connecting members 31, 32, 33, 34 are held in a state where they are pressed against the connecting members 31, 32, 33, 34 and the divided pieces 21, 22, 23, 24 by the binding hoops 20. The ear members 41, 42, 43, 44 may be previously attached to the connecting members 31, 32, 33, 34 and the divided pieces 21, 22, 23, 24 with adhesive tape (not shown).

[0035] In this way, by attaching the end face protection material 1 to both end faces 11, 12 of the wire coil 10, 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. The circumferential binding position of each binding hoop 20 is the same as the affixing position of each joining member 31, 32, 33, 34 affixed to the surface near the divided end face of the circumferentially adjacent divided pieces 21, 22; 22, 23; 23, 24; 24, 21. However, the circumferential binding position of each binding hoop 20 is not limited to the same position as the affixing position of each joining member 31, 32, 33, 34, and may be any position in the circumferential direction of the wire rod coil 10.

[0036] According to the end surface protection material 1 for a metal coil of the second embodiment, the end surface protection material 1 comprises a plurality of divided pieces 21, 22, 23, 24 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, and a plurality of connecting members 31, 32, 33, 34 that connect adjacent divided pieces 21, 22; 22, 23; 23, 24; 24, 21 in the circumferential direction. As a result, the amount of raw material wasted when manufacturing each of the divided pieces 21, 22, 23, and 24 is less than the amount of raw material wasted when manufacturing the annular member 101, and the amount of raw material wasted is reduced, thereby protecting the entire end faces 11 and 12 of the wire coil 10 as a metal coil.

[0037] Furthermore, according to the end surface protection material 1 for a metal coil of the second embodiment, the end surface protection material 1 is provided with ear members 41, 42, 43, 44 that cover the outer and inner corners of the end surfaces 11, 12 of the wire rod coil 10 that come into contact with the binding hoop 20 that binds the wire rod coil 10 as a metal coil. This makes it possible to avoid 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 it is placed on both end surfaces of a rod or wire coil. The end surface protection material 1 for a metal coil according to the third embodiment of the present invention shown in Fig. 10 has the same basic configuration as the end surface protection material 1 for a metal coil shown in Fig. 8 and Fig. 9, but differs from the end surface protection material 1 for a metal coil shown in Fig. 8 and Fig. 9 in that a pair of slits 51, 51, 52, 52, 53, 53, 54, 54 extending radially outward from the inner peripheral edge of each of the divided pieces 21, 22, 23, 24 is formed in each of the divided pieces 21, 22, 23, 24 and arranged at a predetermined interval W from each other. 11 , 5 21 , 5 31 , 5 41 The predetermined interval W between the pair of notches 51, 51, 52, 52, 53, 53, 54, 54 is slightly larger than the width of the hook F, which will be described later.

[0039] The width W1 (see FIG. 12) of the end face protection member 1 formed by the annular member 2 is set to the width W of the end faces 11 and 12 of the wire 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, 12 of the rod / wire coil 10. Also, the height (length) H of each of the slits 51 to 54 is the sum of the width W1 of the end surface protection member 1 and the width W of the end surfaces 11, 12 of the rod / wire 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, and 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 integral 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 peripheral side of the wire rod coil 10. As a result, the end surface protection material 102 is shifted upward with respect 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 then the packaging material is attached and bundled, the hook may interfere with the packaging material, causing a misalignment between the coil end face to be protected and the packaging material, resulting in a risk of part of the coil end face being exposed after bundling.

[0042] In contrast, in FIG. 12, when the wire 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 coil 10 for binding, the hook F contacts the bendable piece 5 formed between the notches 51, 51 of the end surface protection member 1. 11 contacting 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 circumferential side of the wire rod coil 10. Then, as shown in Figs. 12 and 13, the hook F enters the bendable piece 5 formed between the slits 51, 51 of the end surface protection member 1. 11 bendable piece 5 in contact with 11 As a result, the width W1 of the end surface protection material 1 is bent inwardly of the extension 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 formed on the bendable piece 5 formed between the notches 51, 51 of the end surface protection material 1. 11 bendable piece 5 in contact with 11 However, when the hook F enters the inner circumferential side of the wire coil 10, the hook F bends the bendable pieces 5 formed between the notches 52, 52, 53, 53, 54, 54 of the end surface protection material 1. 21 , 5 31 , 5 41 Also contacts bendable piece 55 21 , 5 31 , 5 41 also bends in the same way. Thus, according to the end surface protection material 1 for a metal coil of the third embodiment shown in Figure 10, by using the end surface protection material 1 having a pair of notches 51, 51 to 54, 54 formed therein when the rod / wire coil 10 is placed on the hook F, it is possible to cover the entire end surfaces 11, 12 of the rod / wire coil 10 with the end surface protection material 1 after binding with the binding 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. For example, the number of divisions into the divided pieces 21, 22, 23, and 24 is not limited to four, but may be any plural number. Furthermore, the material of each of the divided pieces 21, 22, 23, and 24 may be any material that is softer than the steel material of the wire coil 10 as a metal coil and can protect the wire coil 10, and is not limited to cardboard, but may also be plastic, cloth, etc. Furthermore, the divided pieces 21, 22, 23, 24 do not necessarily have to be divided into equal sizes along the circumferential direction of the wire coil 10.

[0046] Furthermore, the respective joining members 31, 32, 33, 34 may be made of a material other than adhesive tape as long as they can join the divided pieces 21, 22; 22, 23; 23, 24; 24, 21 adjacent to each other in the circumferential direction. Furthermore, the circumferential placement position of each ear member 41, 42, 43, 44 need only correspond to the circumferential binding position of each binding hoop 20, and is not limited to being on each connecting member 31, 32, 33, 34 attached to the surface near the divided end face of circumferentially adjacent divided pieces 21, 22; 22, 23; 23, 24; 24, 21.

[0047] Furthermore, the material of each of the ear members 41, 42, 43, 44 may be any material that is softer as a metal coil than the steel material that is the material of the wire rod coil 10 and that can protect the outer and inner corners of the end faces 11, 12 of the wire rod coil 10, and is not limited to cardboard, but may also be plastic, cloth, etc. Furthermore, although the ear members 41, 42, 43, and 44 are configured as separate members from the divided pieces 21, 22, 23, and 24, they may also be configured as one body with the divided pieces 21, 22, 23, and 24. Furthermore, the metal coil to which the end surface protection material 1 is applied may be a cylindrical metal coil other than the wire rod coil 10, such as a hot-rolled steel plate coil or a cold-rolled steel plate coil.

[0048] 10, a pair of notches 51, 51 to 54, 54 is formed in each of the plurality of segments 21 to 24, but the present invention is not limited to this, and a pair of notches may be formed in any one of the plurality of segments 21 to 24. Furthermore, in the metal coil end surface protection material 1 shown in FIG. 1, a pair of notches may be formed in any one of the plurality of segments 21 to 24. [Explanation of symbols]

[0049] 1. Metal coil end protection material 2. Annular member 21~24 pieces 31 to 34 connecting members 41~44 ear parts 51~54 notches 5 11 ~5 41 Bendable piece 10. Wire rod coil (metal coil) 11 End face 12 End face 20 bundling hoops F hook S1 raw materials S 11 ~S 15 Discarded part

Claims

1. A metal coil end surface protection material that protects the end surfaces of a cylindrical metal coil, a plurality of divided pieces obtained by dividing an annular member that covers the entire end surface of the metal coil into a plurality of pieces, and a plurality of connecting members that connect adjacent divided pieces in the circumferential direction, A metal coil end surface protection material characterized in that at least one of the plurality of 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.

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

3. 3. The end surface protection material for a metal coil according to claim 1, wherein the metal coil is a wire coil.

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