Reel

Abstract

To provide a reel in which a flange part has a high strength, and of which weight saving is possible.SOLUTION: A reel 10 comprises a winding barrel part 1, and a flange part 2 provided at an end of the winding barrel part 1. The flange part 2 comprises a plurality of veneer materials 5 arranged adjacent to each other, and a connection member 8. The veneer materials 5 adjacent to each other are coupled to each other by convexoconcave fitting of the connection member 8. On one of the adjacent veneer materials 5, a first fitting recess, into which a part of the connection member 8 is convexoconcave-fitted, is formed. On the other of the adjacent veneer materials 5, a second fitting recess, into which another part of the connection member 8 is convexoconcave-fitted, is formed.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a bobbin. [Background technology]

[0002] Wire materials such as electric wires and cables are wound around a reel for transportation, storage, etc. The reel includes a body portion around which the wire material is wound and a flange portion (flange plate) provided at the end of the body portion. The flange portion is formed, for example, by laminating multiple composite plate materials. The strength of the flange portion is increased by the structure in which multiple composite plate materials are laminated (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 9-175742 Summary of the Invention [Problem to be solved by the invention]

[0004] The heavy weight of the reel imposes a heavy burden on material handling during wire production, and the heavy weight of the reel also imposes a heavy burden on transportation.

[0005] An object of one aspect of the present invention is to provide a winding frame that has a high strength flange and can be made lighter. [Means for solving the problem]

[0006] A winding frame according to a first aspect of the present invention comprises a winding drum portion and a flange portion provided at an end of the winding drum portion, the flange portion comprising a plurality of adjacently arranged veneer materials, the adjacent veneer materials being joined to each other by recess-projection fitting.

[0007] In a second aspect of the present invention, the reel of the first aspect is characterized in that the flange portion further includes a plate-shaped connecting member that connects adjacent pieces of the veneer material, and a first fitting recess into which a portion of the connecting member fits in a concave-convex manner is formed on a side or end surface of one of the adjacent pieces of the veneer material, and a second fitting recess into which another portion of the connecting member fits in a concave-convex manner is formed on a side or end surface of the other of the adjacent pieces of the veneer material.

[0008] A winding frame according to a third aspect of the present invention is the winding frame of the first aspect, wherein a plate-shaped connecting protrusion is formed on a side surface or end surface of one of the adjacent veneer materials, and a fitting recess into which the connecting protrusion fits is formed on a side surface or end surface of the other of the adjacent veneer materials.

[0009] A winding frame according to a fourth aspect of the present invention is any one of the first to third aspects, wherein the single plate materials are formed into long plate shapes and arranged side by side in the width direction.

[0010] A winding frame according to a fifth aspect of the present invention is any one of the first to third aspects, wherein the plurality of veneer materials include a central veneer material in the form of a long plate extending linearly, a first veneer material group and a second veneer material group arranged on one side of the central veneer material in the width direction, and a third veneer material group and a fourth veneer material group arranged on the other side of the central veneer material in the width direction, wherein the veneer materials of the first veneer material group and the second veneer material group differ from each other in extending directions, and the veneer materials of the third veneer material group and the fourth veneer material group differ from each other in extending directions.

[0011] A sixth aspect of the present invention is a winding frame according to any one of the first to third aspects, wherein the veneer materials are formed in a fan shape and arranged radially. [Effects of the Invention]

[0012] According to one aspect of the present invention, it is possible to provide a winding frame that has a high strength flange and can be made lighter. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 2 is a perspective view of a winding frame according to the first embodiment. [Figure 2] FIG. 2 is a front view of the winding frame according to the first embodiment. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] FIG. [Figure 6] FIG. 10 is a perspective view of a winding frame according to a second embodiment. [Figure 7] FIG. 10 is a front view of a winding frame according to a second embodiment. [Figure 8] FIG. [Figure 9] FIG. [Figure 10] FIG. [Figure 11] FIG. 10 is a front view of a winding frame according to a third embodiment. [Figure 12] FIG. 10 is an enlarged cross-sectional view of a modified example of the flange portion. DETAILED DESCRIPTION OF THE INVENTION

[0014] The winding frame according to the present invention will be described below with reference to the drawings.

[0015] FIG. 1 is a perspective view of a reel 10 according to the first embodiment. FIG. 2 is a front view of the reel 10. FIG. 3 is an enlarged perspective view of a flange portion 2. FIG. 3 is a view of part A shown in FIG. 2. FIG. 4 is an enlarged exploded perspective view of the flange portion 2. FIG. 5 is an enlarged cross-sectional view of the flange portion 2. FIG. 5 is a cross-sectional view taken along line II shown in FIG. 3.

[0016] [Winding frame] (First embodiment) As shown in FIG. 1, the reel 10 includes a reeling drum 1 and two flanges 2 (flange plates) provided on one end and the other end of the reeling drum 1, respectively. The winding drum 1 is formed in a cylindrical shape and can be wound with wires such as electric wires and cables.

[0017] The structure of the reel 10 will be described using an XYZ Cartesian coordinate system. The Z direction is the direction (axial direction) along the central axis of the reel drum 1. The X direction is the length direction of the veneer material 5. The X direction is perpendicular to the Z direction. The Y direction is the width direction of the veneer material 5. The Y direction is perpendicular to the Z direction and the X direction. The X direction is perpendicular to the Y direction. The plane along the X direction and the Y direction is the XY plane. The circumferential direction is the direction going around the central axis of the reel drum 1. The radial direction is the direction passing through the central axis on a plane perpendicular to the central axis of the reel drum 1. A view from the Z direction is called a planar view.

[0018] 1 and 2, the flange 2 is a disk-shaped member concentric with the winding drum 1. The outer diameter of the flange 2 is larger than the outer diameter of the winding drum 1. The flange 2 protrudes radially outward from the outer peripheral surface 1a at the end of the winding drum 1.

[0019] The flange portion 2 includes a plurality of single plate materials 5 and a plurality of connecting members 8. The veneer material 5 is in the form of a long plate. The multiple veneer materials 5 are arranged side by side with their sides facing each other and no gaps in the width direction. The multiple veneer materials 5 are arranged next to each other. The flange portion 2 is a composite plate material having multiple veneer materials 5. The veneer materials 5 are formed of, for example, wood.

[0020] An outlet hole 6 is formed in the flange 2. The outlet hole 6 is a hole for pulling out the end (winding start end) of the wire wound around the winding drum 1 to the outside of the flange 2. The outlet hole 6 penetrates the flange 2 (single plate material 5) in the thickness direction. The outlet hole 6 is an arc-shaped slit along the circumferential direction of the flange 2. The outlet hole 6 is formed radially outward from the outer peripheral surface 1a of the winding drum 1 in a plan view. The outlet hole 6 is formed at a position close to the outer peripheral surface 1a of the winding drum 1 in a plan view.

[0021] A central hole 7 is formed in the center of the flange portion 2. The central hole 7 penetrates the flange portion 2 (single plate material 5) in the thickness direction.

[0022] As shown in Fig. 4, the side surface 5a of one of the adjacent veneer materials 5 faces the side surface 5b of the other veneer material 5. A first fitting recess 11 is formed in the side surface 5a of one of the veneer materials 5. A second fitting recess 12 is formed in the side surface 5b of the other veneer material 5. The first fitting recess 11 and the second fitting recess 12 have a rectangular parallelepiped internal space whose longitudinal direction is along the X direction.

[0023] As shown in Figures 3 to 5, the connecting member 8 connects adjacent veneer materials 5. The connecting member 8 is in the shape of a long plate (for example, a rectangle) with its longitudinal direction along the X direction. The connecting member 8 is in the shape of a plate parallel to the XY plane. The connecting member 8 is in the shape of a plate parallel to the veneer materials 5. The connecting member 8 is formed thinner than the veneer materials 5. The connecting member 8 is formed, for example, from wood.

[0024] A first portion 8A (upper portion) that is a part of the connecting member 8 enters into the first fitting recess 11 and fits into the first fitting recess 11. The fitting between the first portion 8A and the first fitting recess 11 can be said to be a convex-concave fitting, because the first portion 8A, which is a convex portion, enters into the first fitting recess 11.

[0025] The thickness of the first portion 8A is approximately the same as or slightly smaller than the width of the first fitting recess 11. As long as the first portion 8A can be fitted into the first fitting recess 11, the thickness of the first portion 8A may be greater than the width of the first fitting recess 11. It is desirable that the first portion 8A be press-fitted into the first fitting recess 11 and fixed to the inner surface of the first fitting recess 11 by friction.

[0026] The second portion 8B (lower portion), which is another part of the connecting member 8, enters into the second fitting recess 12 and fits into the second fitting recess 12. The fitting between the second portion 8B and the second fitting recess 12 can be said to be a convex-concave fitting, because the second portion 8B, which is a convex portion, enters into the second fitting recess 12.

[0027] The thickness of the second portion 8B is approximately the same as or slightly smaller than the width of the second fitting recess 12. As long as the second portion 8B can be fitted into the second fitting recess 12, the thickness of the second portion 8B may be greater than the width of the second fitting recess 12. It is desirable that the second portion 8B be press-fitted into the second fitting recess 12 and fixed to the inner surface of the second fitting recess 12 by friction.

[0028] The first part 8A of the connecting member 8 fits into the first fitting recess 11, and the second part 8B of the connecting member 8 fits into the second fitting recess 12, so that adjacent veneer sheets 5 are connected via the connecting member 8.

[0029] 2, adjacent veneer materials 5 are connected to each other by a plurality of connecting members 8 provided at different positions in the length direction (X direction). The plurality of connecting members 8 are provided, for example, at intervals in the length direction (X direction) of the veneer materials 5.

[0030] [Effects of the reel according to the embodiment] 1 and 2, in the reel 10, adjacent veneer materials 5 are joined by recess-projection fitting via connecting members 8. Therefore, the mechanical strength of the flange portion 2 is increased.

[0031] In the reel 10, adjacent veneers 5 are joined by recess-projection fitting, which provides sufficient strength to the flange 2. This allows the thickness of the flange 2 to be reduced. As a result, the weight of the flange 2 of the reel 10 can be reduced compared to a reel having a flange made of multiple laminated composite plates. This allows the reel 10 to be made lighter. This reduces the burden of material handling in the manufacture of wire rod. The burden of transporting the reel 10 can also be reduced, which reduces the fuel costs required for transportation.

[0032] In the reel 10, the thickness of the flange 2 can be reduced, and therefore the material cost of the flange 2 can be reduced.

[0033] As shown in FIGS. 3 to 5, adjacent veneer sheets 5 on the reel 10 are connected by connecting members 8 that fit into the fitting recesses 11 and 12. This allows adjacent veneer sheets 5 to be firmly connected. By using connecting members 8, the veneer sheets 5 can be connected without using metal fittings such as nails. This makes it easy to assemble and disassemble the reel 10. When disassembling, this reduces the effort required to separate the wood from the metal fittings. This reduces the time required to assemble and disassemble the reel 10.

[0034] In the reel 10, the veneer materials 5 are formed in the shape of long plates and arranged in parallel in the width direction, which simplifies the structure of the flange portion 2. This allows the reel 10 to be easily assembled and disassembled.

[0035] The flange 2 is mostly made of wood. Wood emits less CO2 during production than other materials (for example, steel), making the reel 10 suitable from the standpoint of environmental conservation.

[0036] [Winding frame] (Second embodiment) Fig. 6 is a perspective view of a reel 110 according to a second embodiment. Fig. 7 is a front view of the reel 110. Fig. 8 is an enlarged perspective view of the flange portion 102. Fig. 8 is a view of part B shown in Fig. 7. Fig. 9 is an enlarged exploded view of the flange portion 102. Fig. 10 is an enlarged cross-sectional view of the flange portion 102.

[0037] In Figure 7, the X direction is the left-right direction. The Y direction is the up-down direction. The Z direction is perpendicular to the X and Y directions. Based on Figure 7, the positional relationship of each component in the flange portion 102 will be provisionally defined. One direction in the X direction (the right side in Figure 7) is the +X side. The direction opposite to the +X side is the -X side. One direction in the Y direction (the upper side in Figure 7) is the +Y side. The direction opposite to the +Y side is the -Y side. The positional relationship defined here does not limit the orientation of the reel 110 during use.

[0038] As shown in Fig. 6, the reel 110 includes a reel body 1 and two flanges 102 provided at one end and the other end of the reel body 1. The reel 110 differs from the reel body 10 (see Fig. 1) according to the first embodiment in that it includes flanges 102 instead of flanges 2.

[0039] As shown in FIGS. 6 and 7, the flange portion 102 includes a plurality of single plate materials 105 and a plurality of connecting members 8. The veneer material 105 is in the shape of a long plate. The multiple veneer materials 105 are lined up with their side end faces (either side faces or end faces) butting against each other. The veneer materials 105 are made of, for example, wood.

[0040] The plurality of veneer materials 105 include a central veneer material 105A, a first group of veneer materials 104B, a second group of veneer materials 104C, a third group of veneer materials 104D, and a fourth group of veneer materials 104E.

[0041] The central veneer 105A extends linearly in the Y direction. In Fig. 7, the central veneer 105A is formed from the upper edge to the lower edge of the flange 102. The central hole 7 is formed in the center of the central veneer 105A in the longitudinal direction.

[0042] The first group of veneer materials 104B and the second group of veneer materials 104C are arranged on one side in the width direction (+X side) of the central veneer material 105A. The first veneer group 104B has a plurality of veneer materials 105B. The veneer materials 105B extend in the X direction. The plurality of veneer materials 105B are arranged side by side with their sides facing each other and no gaps in the width direction. The plurality of veneer materials 105B are arranged next to each other.

[0043] The second veneer group 104C has a plurality of veneer materials 105C. The veneer materials 105C extend in the Y direction. The plurality of veneer materials 105C are arranged side by side with their sides facing each other and no gaps in the width direction. The plurality of veneer materials 105C are arranged next to each other. The second veneer group 104C is arranged adjacent to the first veneer group 104B on the -Y side.

[0044] The veneer materials 105B constituting the first veneer material group 104B extend in the X direction. The veneer materials 105C constituting the second veneer material group 104C extend in the Y direction. Therefore, the veneer materials 105 extend in different directions between the first veneer material group 104B and the second veneer material group 104C.

[0045] The third group of veneer materials 104D and the fourth group of veneer materials 104E are arranged on the other side (-X side) in the width direction relative to the central veneer material 105A. The third veneer group 104D has a plurality of veneer materials 105D. The veneer materials 105D extend in the X direction. The plurality of veneer materials 105D are arranged side by side with their sides facing each other and no gaps in the width direction. The plurality of veneer materials 105D are arranged next to each other.

[0046] The fourth veneer group 104E has a plurality of veneer sheets 105E. The veneer sheets 105E extend in the Y direction. The plurality of veneer sheets 105E are arranged side by side with their sides facing each other and no gaps in the width direction. The plurality of veneer sheets 105E are arranged adjacent to each other. The fourth veneer sheet group 104E is arranged adjacent to the third veneer sheet group 104D on the +Y side.

[0047] The veneer materials 105D constituting the third veneer material group 104D extend in the X direction. The veneer materials 105E constituting the fourth veneer material group 104E extend in the Y direction. Therefore, the veneer materials 105 extend in different directions between the third veneer material group 104D and the fourth veneer material group 104E.

[0048] The first veneer group 104B and the fourth veneer group 104E are adjacent to each other in the X direction via the central veneer 105A. The first veneer group 104B and the fourth veneer group 104E have veneer 105 extending in different directions. The second veneer group 104C and the third veneer group 104D are adjacent to each other in the X direction via the central veneer 105A. The second veneer group 104C and the third veneer group 104D have veneer 105 extending in different directions.

[0049] The connecting member 8 connects adjacent veneer materials 105 by recess and protrusion fitting (see FIGS. 3 to 5). Adjacent veneer materials 105 of the plurality of veneer materials 105 constituting the first veneer material group 104B are joined to each other by a plurality of connecting members 8 provided at different positions in the longitudinal direction. Similarly, adjacent veneer materials 105 of the second veneer material group 104C, the third veneer material group 104D and the fourth veneer material group 104E are joined to each other by a plurality of connecting members 8.

[0050] A connecting protrusion 108 is formed on an end face of the veneer material 105 whose end faces another veneer material 105. Specifically, the connecting protrusion 108 is formed on the end face of the -X side of the veneer material 105B, the end face of the +Y side of the veneer material 105C, the end face of the +X side of the veneer material 105D, and the end face of the -Y side of the veneer material 105E.

[0051] The -X side end face of veneer material 105B abuts against the side face of central veneer material 105A. The +Y side end face of veneer material 105C abuts against the side face of veneer material 105B. The +X side end face of veneer material 105D abuts against the side face of central veneer material 105A. The -Y side end face of veneer material 105E abuts against the side face of veneer material 105D.

[0052] 8 to 10, the connecting protrusions 108 connect adjacent veneer materials 105. The connecting portion (portion B shown in FIG. 7) between veneer materials 105E and 105D will be described as an example.

[0053] The connecting protrusion 108 protrudes toward the -Y side from the end surface 105Ec on the -Y side of the veneer material 105E. The connecting protrusion 108 is in the shape of a long plate (e.g., rectangular) whose longitudinal direction is along the X direction. The connecting protrusion 108 is in the shape of a plate parallel to the XY plane. The connecting protrusion 108 is in the shape of a plate parallel to the veneer material 105E. The connecting protrusion 108 is formed integrally with the veneer material 105E. The connecting protrusion 108 is formed thinner than the veneer material 105E. The connecting protrusion 108 is formed from, for example, wood.

[0054] A side surface 105Dc of the single plate material 105D is formed with a fitting recess 111. The fitting recess 111 has an internal space in the shape of a rectangular parallelepiped whose longitudinal direction is along the X direction.

[0055] The connecting protrusion 108 enters into the fitting recess 111 and fits into the fitting recess 111. The fitting between the connecting protrusion 108 and the fitting recess 111 is a recess-protrusion fitting.

[0056] The thickness of the connecting protrusion 108 is approximately the same as or slightly smaller than the width of the fitting recess 111. As long as the connecting protrusion 108 can fit into the fitting recess 111, the thickness of the connecting protrusion 108 may be greater than the width of the fitting recess 111. It is desirable that the connecting protrusion 108 is press-fitted into the fitting recess 111 and fixed to the inner surface of the fitting recess 111 by friction.

[0057] The connecting protrusions 108 are fitted into the fitting recesses 111, whereby the veneer material 105E is joined to the veneer material 105D.

[0058] 7, the -X side end of the veneer material 105B is connected to the central veneer material 105A by a connecting protrusion 108. The +Y side end of the veneer material 105C is connected to the veneer material 105B by a connecting protrusion 108. The +X side end of the veneer material 105D is connected to the central veneer material 105A by a connecting protrusion 108. The −Y side end of the veneer material 105E is connected to the veneer material 105D by a connecting protrusion 108.

[0059] [Effects of the reel according to the embodiment] 6 and 7, in the reel 110, adjacent veneer materials 105 are joined by recess-projection fitting of the connecting members 8 and the connecting projections 108. Therefore, the mechanical strength of the flange 102 is increased.

[0060] In the reel 110, sufficient strength can be imparted to the flange 102, so the thickness of the flange 102 can be reduced. This reduces the weight of the flange 102, and the weight of the reel 110. This reduces the burden of material handling.

[0061] In the reel 110, adjacent veneer materials 105 are connected by connecting members 8 and connecting protrusions 108. Therefore, adjacent veneer materials 105 can be firmly joined together without using metal fittings such as nails.

[0062] In the reel 110, the first veneer material group 104B and the second veneer material group 104C have veneer materials 105 extending in different directions. The third veneer material group 104D and the fourth veneer material group 104E have veneer materials 105 extending in different directions. In this way, the reel 110 is made up of a combination of multiple veneer material groups, each with a different extending direction of the veneer material 105, and therefore can increase the mechanical strength of the reel 110 against external forces applied to the flange 102 in multiple directions. This allows the reel 110 to have high durability.

[0063] In reel 110, central veneer 105A is provided between veneer groups 104B, 104C and veneer groups 104D, 104E. Central hole 7 is formed in central veneer 105A. When reel 110 is supported by central hole 7, a large force is applied to flange 102 (more specifically, the peripheral edge of central hole 7), but reel 110 distributes this force, thereby increasing the durability of reel 110.

[0064] [Winding frame] (Third embodiment) FIG. 11 is a front view of a winding frame 210 according to the third embodiment. As shown in FIG. 11, the reel 210 includes a reel 1 and two flanges 202 provided on one end and the other end of the reel 1. The reel 210 differs from the reel 10 according to the first embodiment (see FIG. 1) in that it has a flange 202 instead of the flange 2.

[0065] The flange portion 202 includes a plurality of single plate materials 205 and a plurality of connecting members 8. The veneer material 205 is in the shape of a fan plate. The multiple veneer materials 205 are lined up in the circumferential direction with their sides abutting each other. The multiple veneer materials 205 are arranged radially. The multiple veneer materials 205 are arranged next to each other.

[0066] The connecting members 8 connect adjacent veneer materials 205 by recess and protrusion fitting (see FIGS. 3 to 5). Adjacent veneer materials 205 are connected to each other by a plurality of connecting members 8 provided at different positions in the length direction.

[0067] [Effects of the reel according to the embodiment] In the reel 210, adjacent veneer materials 205 are joined by recess-projection fitting via the connecting members 8. Therefore, the mechanical strength of the flange portion 202 is increased.

[0068] In the reel 210, sufficient strength can be imparted to the flange 202, so the thickness of the flange 202 can be reduced. This reduces the weight of the flange 202, and the weight of the reel 210. This reduces the burden of material handling.

[0069] In the reel 210, the connecting members 8 can firmly connect the adjacent veneer materials 205 without using metal fittings such as nails.

[0070] In the reel 210, the veneer materials 205 are formed in a fan shape and arranged radially, which increases the mechanical strength of the flange 202 against external forces applied in multiple directions. This provides the reel 210 with high durability.

[0071] [Flange] (Variation) FIG. 12 is an enlarged cross-sectional view of a flange 302 which is a modified example of the flange 2. As shown in FIG. As shown in FIG. 12, the flange portion 302 includes a plurality of single plates 305 . The multiple veneer materials 305 are lined up with their sides butting against each other. A connecting protrusion 108 is formed on one side of the veneer material 305. A fitting recess 111 is formed on the other side of the veneer material 305. The connecting protrusion 108 fits into the fitting recess 111. Adjacent veneer materials 305 are connected by the connecting protrusion 108 (see Figures 8 to 10).

[0072] In the flange 302, adjacent veneer materials 305 are connected by recess and protrusion fitting using the connecting protrusions 108, so that the adjacent veneer materials 305 are firmly connected and the mechanical strength of the flange 302 can be increased.

[0073] The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. The number of connecting members that connect adjacent veneer sheets is not particularly limited, and the number of connecting members that connect adjacent veneer sheets may be one or more.

[0074] In the reel 10 shown in FIG. 1, the flange portion 2 is made of one composite plate material, but the flange portion 2 may be made of a plurality of laminated composite plate materials.

[0075] 1 includes a winding drum 1 and flanges 2 provided at both ends of the winding drum 1, but the flanges may be provided only at one end of the winding drum. The flanges are not limited to being provided at the ends of the winding drum, and may be provided at any position along the length of the winding drum.

[0076] As shown in Fig. 4, the structure for connecting adjacent veneer sheets with a connecting member may be provided on the side surface of the veneer sheet or on the end surface of the end portion. That is, the first and second mating recesses may be formed on the side surface of the veneer sheet or on the end surface of the end portion of the veneer sheet.

[0077] As shown in Figure 9, the structure for connecting adjacent veneer sheets with connecting protrusions may be provided on the side surfaces of the veneer sheets or on the end surfaces of the end portions. That is, the connecting protrusions may be formed on the side surfaces of the veneer sheets or on the end surfaces of the end portions. The mating recesses that fit into the connecting protrusions may be formed on the side surfaces of the veneer sheets or on the end surfaces of the end portions of the veneer sheets.

[0078] In addition, it is possible to replace the components in the above-described embodiments with well-known components as appropriate, and the above-described embodiments and variations may be combined as appropriate, without departing from the spirit of the present invention. [Explanation of symbols]

[0079] 1...winding drum portion, 2,102,202,302...flange portion, 5,105,105B,105C,105D,105E,205,305...veneer material, 8...connecting member, 10,110,210...winding frame, 11...first fitting recess, 12...second fitting recess, 104B...first veneer material group, 104C...second veneer material group, 104D...third veneer material group, 104E...fourth veneer material group, 105A...central veneer material, 108...connecting protrusion, 111...fitting recess

Claims

1. The winding drum includes a flange provided at an end of the winding drum, The flange portion includes a plurality of adjacently arranged single-plate members, Adjacent veneer materials are joined to each other by recess-projection fitting, The plurality of veneer materials include a central veneer material having a long plate shape extending linearly, a first group of veneer sheets and a second group of veneer sheets arranged on one side of the central veneer sheet in the width direction; a third group of veneer materials and a fourth group of veneer materials arranged on the other side of the central veneer material in the width direction, The first group of veneer materials and the second group of veneer materials have different extending directions of the veneer materials, The third veneer group and the fourth veneer group have different extending directions of the veneer, The first veneer group, the second veneer group, the third veneer group, and the fourth veneer group each have a plurality of veneer materials arranged adjacent to each other, The first group of veneer materials and the second group of veneer materials are aligned in the longitudinal direction of the central veneer material, The third group of veneer sheets and the fourth group of veneer sheets are aligned in the longitudinal direction of the central veneer sheet, The first group of veneer materials and the fourth group of veneer materials are arranged in the width direction of the central veneer material, with the central veneer material being spaced apart, The veneer materials constituting the second veneer material group and the fourth veneer material group extend along the central veneer material. Reel frame.

2. The flange portion further includes a plate-shaped connecting member that connects adjacent ones of the single plate materials, a first fitting recess into which a portion of the connecting member fits in a concave-convex manner is formed on a side surface or an end surface of one of the adjacent veneer materials; a second fitting recess into which another part of the connecting member fits in a concave-convex manner is formed on a side surface or end surface of the other of the adjacent veneer materials; The bobbin according to claim 1.

3. A plate-shaped connecting protrusion is formed on a side surface or an end surface of one of the adjacent veneer materials, A fitting recess into which the connecting protrusion fits is formed on a side surface or end surface of the other of the adjacent veneer materials. The bobbin according to claim 1.

4. The veneer materials are formed into long plates and arranged side by side in the width direction. The bobbin according to claim 1.

5. The flange portion has an outlet hole formed therein that penetrates the flange portion in the thickness direction. The bobbin according to claim 1.

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