Reel

Abstract

To provide a reel capable of keeping a bonding force of a plurality of constituent members within an appropriate range.SOLUTION: A reel 1 includes a first member 10 and a second member 20 coupled to each other and facing each other. The first member 10 has a first flange 11 and a first base portion 13 protruding from an inner surface 11a, which is one surface of the first flange 11. The first base portion 13 is formed with a protrusion 13a that protrudes in a protruding direction of the first base portion 13, and the second member 20 has a second flange 21 and a second base portion 23 that protrudes from an inner surface 21a that is one surface of the second flange 21. A hole 23a is formed in the second base portion 23, the inner surface 11a of the first flange 11 and the inner surface 21a of the second flange 21 are arranged opposite to each other, and the first member 10 and the second member 20 are joined together by inserting the protrusion 13a into the hole 23a and forming a tip of the protrusion 13a protruding from the hole 23a to be larger than the hole 23a.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present disclosure relates to a reel for holding a component tape that stores components such as electronic components. [Background technology]

[0002] BACKGROUND ART Reels for storing electronic components such as piezoelectric vibrators, capacitors, or resistors have been proposed (see, for example, Patent Document 1).

[0003] This reel is constructed by combining two members. Specifically, the two members are joined together by inserting a convex portion formed on one of the two members into a concave portion formed on the other, and by inserting the convex portion formed on the other member into a concave portion formed on the first member. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-138484 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the reel of Patent Document 1 has a problem in that the bonding strength between the two members (i.e., the multiple components) may be difficult to keep within an appropriate range. In other words, if the bonding strength between the two members is too weak, the two members may separate while the reel is being transported. On the other hand, if the bonding strength between the two members is too strong, the two members may not be able to be easily separated when needed.

[0006] Therefore, the present disclosure provides a reel that can keep the bonding force of multiple components within an appropriate range. [Means for solving the problem]

[0007] A reel according to one embodiment of the present disclosure is a reel that holds a wound component tape that stores components, and includes a first member and a second member that are coupled to each other and face each other. The first member has a first flange and a first base portion that protrudes from an inner surface of the first flange. The first base portion has a convex portion that protrudes in the direction of the protrusion of the first base portion. The second member has a second flange and a second base portion that protrudes from an inner surface of the second flange. A hole is formed in the second base portion. The inner surfaces of the first flange and the second flange are arranged opposite each other. The first member and the second member are coupled to each other by sandwiching the periphery of the hole in the second base portion between the first base portion and the tip of the convex portion inserted into the hole, which protrudes from the hole and is larger than the hole. [Effects of the Invention]

[0008] The reel of the present disclosure can keep the bonding force of multiple components within an appropriate range. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is an external view of a component mounting device in which a reel according to an embodiment of the present invention is used. [Figure 2] FIG. 2 is a plan view showing the main configuration of the component mounting device. [Figure 3] FIG. 3 is a schematic diagram showing the positional relationship between the head and the component supply device. [Figure 4] FIG. 4 is an external view showing the appearance of an electronic component to be mounted. [Figure 5] FIG. 5 shows an example of a reel around which a component tape is wound, according to an embodiment of the present invention. [Figure 6] FIG. 6 is a diagram showing an example of two components that make up the reel in the embodiment. [Figure 7] FIG. 7 is a diagram showing an example of two components that make up the reel in the embodiment. [Figure 8] FIG. 8 is a diagram illustrating the connection between the first member and the second member in the embodiment. [Figure 9] FIG. 9 shows an example of component tapes being wound around reels in this embodiment. [Figure 10] FIG. 10 shows an example of a front view and a cross section of a reel according to an embodiment. [Figure 11] FIG. 11 is a flowchart showing the process of holding component tapes on reels in this embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] In order to solve the above problem, a reel according to a first aspect of the present disclosure is a reel that holds a component tape that stores components in a wound state, and includes a first member and a second member that are coupled to each other and face each other. The first member has a first flange and a first base portion that protrudes from an inner surface that is one side of the first flange. The first base portion has a convex portion that protrudes in the direction of the protrusion of the first base portion. The second member has a second flange and a second base portion that protrudes from an inner surface that is one side of the second flange. A hole is formed in the second base portion. The inner surfaces of the first flange and the second flange are arranged opposite each other. The first member and the second member are coupled to each other by sandwiching the periphery of the hole in the second base portion between the first base portion and the tip of the convex portion that protrudes from the hole and is larger than the hole.

[0011] As a result, the periphery of the hole in the second base is sandwiched between the tip of the protruding portion that protrudes from the hole and is larger than the hole and the first base, so the first member and the second member are joined by crimping. That is, the first member and the second member are joined by crimping. Specifically, the tip of the protruding portion that protrudes from the hole is deformed, for example, by being crushed, so that it spreads along the periphery of the hole in the second base. As a result, the first member and the second member are joined by crimping. As a result, the joining force between the first member and the second member of the reel can be set within an appropriate range, neither too weak nor too strong.

[0012] In a reel according to a second aspect, the convex portion may be cylindrical or columnar with a diameter of 3 mm to 10 mm. The second aspect may be dependent on the first aspect.

[0013] This allows the bonding force between the first member and the second member to be set within an appropriate range.

[0014] In addition, in the reel according to the third aspect, the bonding force of the bond may be equal to or greater than 30 N and equal to or less than 50 N. The third aspect may be subordinate to the first or second aspect.

[0015] This prevents the first member and the second member from being easily separated, and allows the first member and the second member to be easily separated when necessary.

[0016] In a reel according to a fourth aspect, the first base portion may be formed with a plurality of protrusions including the protrusion, and the second base portion may be formed with a plurality of holes including the hole. Note that the fourth aspect may be dependent on any one of the first to third aspects.

[0017] This allows the bonding strength between the first and second members to be set within an appropriate range. For example, the bonding strength can be adjusted by adjusting the number of projections and holes.

[0018] Hereinafter, the embodiments will be specifically described with reference to the drawings.

[0019] The embodiments described below are all comprehensive or specific examples. The numerical values, shapes, materials, components, component placement and connection configurations, steps, and step sequences shown in the following embodiments are merely examples and are not intended to limit the present invention. Furthermore, among the components in the following embodiments, components that are not recited in the independent claims that represent the highest concepts are described as optional components. Furthermore, each figure is a schematic diagram and is not necessarily an exact illustration. Furthermore, the same components are denoted by the same reference numerals in each figure. Furthermore, expressions such as "approximately parallel" are used in the following embodiments. For example, "approximately parallel" does not only mean completely parallel, but also means substantially parallel, i.e., including an error of, for example, a few percent. Furthermore, "approximately parallel" means parallel within the range in which the effects of the present disclosure can be achieved. The same applies to other expressions using "approximately."

[0020] (Embodiment) [Component placement device] FIG. 1 is an external view of a component mounting device in which a reel according to this embodiment is used.

[0021] Component mounting apparatus 100 receives circuit board (hereinafter simply referred to as board) 90 from the upstream side, mounts components such as electronic components on board 90, and sends board 90 with the components mounted thereon downstream.

[0022] Specifically, component mounting apparatus 100 includes, for example, two sub-equipments (front sub-equipment 110 and rear sub-equipment 120) that simultaneously and independently mount components. Each of sub-equipments 110 and 120 is a Cartesian robot-type mounting stage and includes a component supply unit 115, a multi-placement head 112, an XY robot 113, and a component recognition camera 116. Rear sub-equipment 120 includes a tray supply unit 117. Component supply unit 115 includes an array of multiple component supply devices (also called feeders) 114, each of which stores component tapes.

[0023] Here, a component tape is, for example, a tape that individually stores a plurality of components of the same component type. Such a component tape is supplied wound on a reel, for example, as in this embodiment.

[0024] The multi-placement head 112 (hereinafter simply referred to as the head) is equipped with a suction nozzle (hereinafter simply referred to as the nozzle) and can pick up components from the component supply device 114 described above and place them on the board 90. The XY robot 113 moves the head 112. The component recognition camera 116 is used to inspect the pick-up state of the components picked up by the head 112 in two or three dimensions. The tray supply unit 117 supplies tray components. Each of these stages mounts components on the board 90 it is responsible for independently of (for example, in parallel with) the other stages.

[0025] Specifically, this component mounting apparatus 100 is a mounting machine that combines the functions of both a component mounting machine known as a high-speed mounting machine and a component mounting machine known as a multi-function mounting machine. A high-speed mounting machine is a machine characterized by high productivity, primarily mounting electronic components of 10 mm or less at a speed of approximately 0.1 seconds per component. A multi-function mounting machine is a machine that mounts large electronic components of 10 mm or more, odd-shaped components such as switches or connectors, or IC components such as QFPs (Quad Flat Packages) or BGAs (Ball Grid Arrays).

[0026] In other words, this component mounting apparatus 100 is designed to be able to mount almost all kinds of electronic components, ie, a wide variety of components ranging from 0.25 mm×0.125 mm chip resistors to 200 mm connectors.

[0027] FIG. 2 is a plan view showing the main configuration of the component mounting apparatus 100. As shown in FIG.

[0028] If the stage is equipped with a tray supply unit 117, the tray transfer unit (not shown) is a moving table on which components picked up from the tray supply unit 117 are placed and which transports the components to a position where they can be picked up by the head 112. The nozzle station 119 is a table on which replacement nozzles corresponding to various shapes of components are placed.

[0029] Component recognition camera 116 is disposed near the center of component supply unit 115 in the arrangement direction of component supply devices 114. After picking up a component from component supply unit 115, head 112 passes component recognition camera 116, moves to a mounting point on board 90, and repeats the operation of sequentially mounting all of the picked-up components. The mounting point is the position on the board where the component is to be mounted.

[0030] FIG. 3 is a schematic diagram showing the positional relationship between the head 112 and the component supply device 114. As shown in FIG.

[0031] For example, up to ten nozzles 112a can be attached to this head 112. Head 112 with ten nozzles 112a attached can simultaneously pick up components from up to ten component supply devices 114 (i.e., with one up-and-down movement).

[0032] The component supply device 114 unwinds the component tape 50 from the reel 1, thereby supplying the components stored on the component tape 50 to a position where they can be picked up by the nozzle 112a.

[0033] The component mounting apparatus 100 moves the head 112 to the component supply unit 115 and has the head 112 pick up components. The component mounting apparatus 100 then moves the head 112 at a constant speed over the component recognition camera 116, causing the component recognition camera 116 to capture images of all components picked up by the head 112 and accurately detect the pick-up positions of the components. The component mounting apparatus 100 then moves the head 112 to the board 90 and sequentially places all picked-up components on the mounting points. The component mounting apparatus 100 mounts all predetermined components on the board 90 by repeatedly performing the pick-up, movement, and placement operations using the head 112.

[0034] Fig. 4 is a diagram showing the appearance of an electronic component to be mounted, and Fig. 5 is a diagram showing an example of a reel 1 around which a component tape 50 is wound.

[0035] Various chip-type electronic components 201-204 such as those shown in FIGS. 4(a)-4(d) are stored in storage recesses 51a formed consecutively at regular intervals on a carrier tape 51 shown in FIG. 5, and are packaged by attaching a cover tape 52 to the top surface of the storage recesses 51a. The component tape 50 is composed of the carrier tape 51 and the cover tape 52. The component tape 50 is then supplied to the user in the form of a taping in which a predetermined number of components are wound around a reel 1. Note that the component tape 50 may have a configuration other than that shown in FIG. 5.

[0036] In this manner, the reel 1 in this embodiment holds the component tape 50 that stores the components, with the component tape 50 wound around it.

[0037] 6 and 7 are diagrams showing examples of two components that make up reel 1 in this embodiment.

[0038] As shown in Figures 6 and 7, the reel 1 includes, as its constituent members, a first member 10 and a second member 20 that are coupled to each other and face each other. The first member 10 and the second member 20 are each integrally formed, for example, as a resin molded product (a specific example is a molded product of polystyrene or the like). Note that Figure 6 is a front view of each of the first member 10 and the second member 20, and Figure 7 is a perspective view of each of the first member 10 and the second member 20.

[0039] The first member 10 has a first flange 11 and four first base portions 13. The first flange 11 is generally disk-shaped. The first flange 11 is formed with an insertion hole 14 and two opening windows 15. The insertion hole 14 is formed in the center of the first flange 11, and a shaft for rotating the reel 1 is inserted into the insertion hole 14. The two opening windows 15 are formed at positions on either side of the insertion hole 14 of the first flange 11.

[0040] Each of the four first base portions 13 protrudes from an inner surface 11a, which is one surface of the first flange 11. Specifically, the four first base portions 13 are formed at positions that surround the insertion hole 14. Each of the four first base portions 13 has a protruding portion 13a that protrudes in the protruding direction of the first base portion 13. Specifically, the protruding portion 13a is formed on a tip surface 13b that is located at the tip of the first base portion 13 and is approximately parallel to the inner surface 11a.

[0041] Moreover, the protrusion 13a has a cylindrical or columnar shape with a diameter of 3 mm or more and 10 mm or less, and the central axis of the protrusion 13a is along a direction substantially perpendicular to the tip surface 13b of the first base portion 13. The height of the protrusion 13a from the first base portion 13 (specifically, the tip surface 13b) may be, for example, 1.8 mm.

[0042] The second member 20 has a second flange 21 and four second base portions 23. The second flange 21 is generally disk-shaped and has approximately the same size as the first flange 11. The second flange 21 is also formed with an insertion hole 24 and two opening windows 25. The insertion hole 24 is formed in the center of the second flange 21, and a shaft for rotating the reel 1 is inserted into the insertion hole 24. The two opening windows 25 are formed at positions on either side of the insertion hole 24 of the second flange 21.

[0043] Each of the four second base portions 23 protrudes from an inner surface 21a, which is one surface of the second flange 21. Specifically, the four second base portions 23 are formed at positions surrounding the insertion hole 24. Each of the four second base portions 23 has a hole 23a. Specifically, the hole 23a is formed in a tip surface 23b at the tip of the second base portion 23, which is approximately parallel to the inner surface 21a.

[0044] In a specific example, the first member 10 and the second member 20 are each injection molded from a resin material so as to have an overall thickness of approximately 0.3 mm.

[0045] Fig. 8 is a diagram for explaining the joining of the first member 10 and the second member 20. Note that Fig. 8(a) to (c) are partial cross-sectional views of the first member 10 and the second member 20 taken along line AA shown in Fig. 6, and Fig. 8(c) is a partial cross-sectional view of the first member 10 and the second member 20 joined together.

[0046] 8(a), when the first member 10 and the second member 20 are joined, the inner surface 11a of the first flange 11 and the inner surface 21a of the second flange 21 are disposed opposite each other. At this time, the four first base portions 13 of the first member 10 and the four second base portions 23 of the second member 20 face each other. Furthermore, the four protrusions 13a of the first member 10 and the four holes 23a of the second member 20 face each other.

[0047] Four first recesses 13c are formed in outer surface 11b, which is the back (i.e., outer) surface of inner surface 11a of first member 10. The first recesses 13c are located on the back side of first base portion 13 and are recessed because first base portion 13 protrudes from inner surface 11a. Similarly, four second recesses 23c are formed in outer surface 21b, which is the back (i.e., outer) surface of inner surface 21a of second member 20. The second recesses 23c are located on the back side of second base portion 23 and are recessed because second base portion 23 protrudes from inner surface 21a.

[0048] 8(b), the protrusion 13a of the first member 10 is inserted into the hole 23a of the second member 20. At this time, the tip surface 13b of the first base portion 13 on the first member 10 and the tip surface 23b of the second base portion 23 on the second member 20 come into contact with each other.

[0049] 8(c), the tip of the protrusion 13a inserted into the hole 23a is crushed toward the tip surface 13b of the first base portion 13. As a result, the tip of the protrusion 13a is deformed so as to become larger than the hole 23a. This causes the first member 10 and the second member 20 to be crimped and joined together.

[0050] That is, in reel 1 of the present embodiment, first member 10 and second member 20 are crimped together by sandwiching the periphery of hole 23a in second base portion 23 between first base portion 13 and the tip of protrusion 13a inserted into hole 23a, which protrudes from hole 23a and is larger than hole 23a. That is, in this crimping connection, the periphery of hole 23a in second base portion 23 is sandwiched between the tip of protrusion 13a and tip surface 13b of first base portion 13.

[0051] 9 is a diagram showing an example of a state in which the component tape 50 is wound around the reel 1. Note that Fig. 9 shows a cross section of the four first base portions 13 (or four second base portions 23) cut along a plane parallel to the first flange 11 of the reel 1, as viewed from the second flange 21 side.

[0052] The four first base portions 13 of the first member 10 and the four second base portions 23 of the second member 20 face each other and contact each other to form a reel hub around which the component tape 50 is wound. This means that four pairs of bases 30 are formed, each consisting of a first base portion 13 and a second base portion 23 that faces and contacts the first base portion 13. The four pairs of bases 30 form a roughly cylindrical or columnar core. The component tape 50 is wound around the outer periphery of each of the four pairs of bases 30 (i.e., the first base portions 13 and the second base portions 23).

[0053] When winding the component tape 50, the leading edge of the component tape 50 is first inserted into the gap between the two pairs of bases 30, as shown in FIG. 9 . In other words, this gap serves as a tape insertion opening. The component tape 50 is then wound around the reel hub with the leading edge of the component tape 50 inserted into the gap. In this embodiment, each of the four pairs of bases 30 is formed in a generally fan-like shape so that it becomes wider from the insertion hole 14 side of the first flange 11 toward the periphery, or from the insertion hole 24 side of the second flange 21 toward the periphery. For example, as shown in FIG. 9 , the leading edge of the component tape 50 is hooked onto an acute-angled portion of the pair of bases 30. This makes it difficult for the leading edge of the component tape 50 to come off the reel hub during winding.

[0054] 10A and 10B are diagrams showing an example of a front view and a cross section of the reel 1 according to the present embodiment. FIG. 10A is a front view of the reel 1, showing the reel 1 as viewed from the second member 20 side. FIG. 10B is a cross section of the reel 1 taken along line BB in FIG. 10A, and FIG. 10C is a cross section of the reel 1 around which a component tape 50 is wound.

[0055] As described above, the first member 10 and the second member 20 of the reel 1 are joined by crimping. Therefore, as shown in FIGS. 10A and 10B, each of the four protrusions 13a of the first member 10 protrudes through the hole 23a from the bottom of the corresponding second recess 23c of the second member 20 and is crushed. Then, as shown in FIG. 9, the component tape 50 is wound around the reel 1. As a result, as shown in FIG. 10C, the component tape 50 is wound around the outer circumferential surfaces of the four base pairs 30 (i.e., the first base portions 13 and the second base portions 23).

[0056] FIG. 11 is a flowchart showing the process of holding the component tape 50 on the reel 1.

[0057] First, the reel 1 is assembled by joining the first member 10 and the second member 20 (step S1). At this time, the first member 10 and the second member 20 are joined by crimping. Next, the leading end of the component tape 50, i.e., the end of the component tape 50, is inserted into the tape insertion opening, which is the gap between the two pairs of bases 30 of the assembled reel 1 (step S2). The component tape 50 is then wound around the reel hub of the reel 1 (step S3).

[0058] As described above, in reel 1 according to the present embodiment, the tip of protrusion 13a protruding from hole 23a is formed larger than hole 23a, and therefore first member 10 and second member 20 are joined by crimping. That is, first member 10 and second member 20 are joined by crimping. Specifically, the tip of protrusion 13a protruding from hole 23a is deformed, for example, by being crushed, so as to expand along the periphery of hole 23a in second base portion 23. As a result, first member 10 and second member 20 are joined by crimping. As a result, the joining force between first member 10 and second member 20 of reel 1 can be set within an appropriate range, neither too weak nor too strong.

[0059] In a specific example, the bonding force of the crimped connection is 30 N or more and 50 N or less. The bonding force is measured by wrapping a string around the reel hub of the reel 1 and pulling the string with a push-pull gauge in a direction that separates the first member 10 and the second member 20 from each other. Therefore, for example, even if a force that separates the first member 10 and the second member 20 of the reel 1 is applied during transportation of the reel 1, the reel 1 can be prevented from separating into the first member 10 and the second member 20. On the other hand, if a user intentionally applies a force to separate the first member 10 and the second member 20 of the reel 1, the reel 1 can be easily separated into the first member 10 and the second member 20. When the crimped first member 10 and the second member 20 are separated, the tip portion of the protrusion 13a, i.e., the portion that has been significantly deformed by crimping, comes off from the base of the tip portion. For example, by separating the reel 1 around which the component tape 50 is wound into the first member 10 and the second member 20, the wound component tape 50 can be easily removed from the reel 1 without having to pull out the component tape 50 from its end and rewind it. The wound component tape 50 can then be inserted into, for example, a tape box and placed in the component supply unit 115 of the component mounting device 100. This allows the component supply unit 115 to supply components in a reel-less state.

[0060] In the present embodiment, one protrusion 13a is formed on the first base portion 13, and one hole 23a is formed on the second base portion 23. However, a plurality of protrusions 13a including the protrusion 13a may be formed on the first base portion 13, and a plurality of holes 23a including the hole 23a may be formed on the second base portion 23.

[0061] This allows the bonding strength between the first member 10 and the second member 20 to be set within an appropriate range. For example, the bonding strength can be adjusted by adjusting the number of protrusions 13a and holes 23a. In this embodiment, the number of first base portion 13 and second base portion 23 is one, but is not limited to one and may be two or more.

[0062] (Other variations) While the reels according to one or more aspects have been described above based on the above-mentioned embodiments, the present disclosure is not limited to these embodiments. As long as they do not deviate from the spirit of the present disclosure, various modifications conceivable by those skilled in the art to the above-mentioned embodiments may also be included within the scope of the present disclosure.

[0063] For example, in the above embodiment, the first member 10 and the second member 20 have different shapes. That is, the first member 10 has a convex portion 13a but no hole 23a, and conversely, the second member 20 has a hole 23a but no convex portion 13a. However, the first member 10 and the second member 20 may have the same shape. For example, the first member 10 has two convex portions 13a and two holes 23a. The second member 20 has two holes 23a corresponding to the two convex portions 13a of the first member 10 and two convex portions 13a corresponding to the two holes 23a of the first member 10. In this case, since the first member 10 and the second member 20 have the same shape, a common mold can be used to mold the first member 10 and the second member 20, and the productivity of the reel 1 can be improved.

[0064] Furthermore, in the above embodiment, the first member 10 and the second member 20 are each a resin molded product, but they may also be made of other materials such as metal.

[0065] Furthermore, although the thickness of each of the first member 10 and the second member 20 in the above embodiment is substantially uniform, it may be configured to be non-uniform. For example, the protrusion 13a may or may not be hollow. [Industrial Applicability]

[0066] The reel of the present disclosure has the effect of being able to keep the bonding force of multiple components within an appropriate range, and is useful, for example, as a reel for holding component tape that stores components such as electronic components. [Explanation of symbols]

[0067] 1 reel 10 First member 11 First flange 11a Inner surface 11b External surface 13 First base 13a Convex part 13b Tip surface 13c First recess 14 Insertion hole 15 Opening window 20 Second member 21 Second flange 21a Inside 21b External surface 23 Second base 23a hole 23b Tip surface 23c Second recess 24 Insertion hole 25 Opening window 30 Foundation Pairs 50 component tape 51 Carrier tape 51a Storage recess 52 Cover Tape 90 PCB 100 Component placement device 110 Front Sub-facility (Sub-facility) 112 Multi-placement head (head) 112a Nozzle 113 XY Robot 114 Parts supply device 115 Parts Supply Department 116 Parts Recognition Camera 117 Tray supply unit 119 Nozzle Station 120 Rear Sub-Equipment (Sub-Equipment)

Claims

1. A reel that holds a component tape that stores components in a wound state, The device includes a first member and a second member coupled to each other in opposing relation, The first member is a first flange and a first base portion protruding from an inner surface that is one surface of the first flange; a protrusion formed on the first base portion and protruding in a direction of protrusion of the first base portion; The second member is a second flange; and a second base portion protruding from an inner surface that is one surface of the second flange, A hole is formed in the second base portion, the inner surface of the first flange and the inner surface of the second flange are disposed opposite to each other, the first member and the second member are joined together by sandwiching the periphery of the hole in the second base portion between the tip of the protrusion inserted into the hole, which protrudes from the hole and is larger than the hole, and the first base portion. reel.

2. The convex portion has a cylindrical or columnar shape with a diameter of 3 mm or more and 10 mm or less. The reel according to claim 1.

3. The bonding strength of the bond is 30 N or more and 50 N or less. The reel according to claim 1.

4. A plurality of protrusions including the protrusion are formed on the first base portion, The second base portion has a plurality of holes including the hole formed therein. The reel according to claim 1.

Images