Coiled body

Abstract

This prevents the winding material from being incorrectly attached to the support shaft. [Solution] The winding body comprises a core body 100 and a long winding material wound around the core body 100. The core body 100 has the shape of a hollow tube having one end 101 and the other end 111. The core body 100 has multiple protrusions that extend from the inner circumferential surface 120 of the hollow tube, one on the side of the one end 101 and the other on the side of the other end 111. The number of protrusions on the side of the one end 101 is different from the number of protrusions on the side of the other end 111.

Description

Technical Field

[0001] The present disclosure relates to a wound body in which a long wound object is wound around a core body.

Background Art

[0002] Japanese Patent Application Laid-Open No. 2005-53538 (Patent Document 1) discloses a drug packaging device that forms a drug storage chamber by overlapping and heat-sealing two continuous sheets of paper, and then injects and seals a drug into the drug storage chamber. The continuous sheets of paper are wound up into a roll for easy handling and are supplied while unwinding the roll. The drug packaging device includes a reel on which the roll is mounted.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a packaging device including a plurality of support shafts on which a wound body is mounted, it is required to correctly mount the wound body on the support shaft in order to appropriately unwind the wound object from the wound body for use in packaging.

[0005] In the present disclosure, a technique for preventing incorrect mounting of the wound body on the support shaft is proposed.

Means for Solving the Problems

[0006] The wound body according to the present disclosure includes a core body and a long wound object wound around the core body. The core body has a shape of a hollow tubular body having a first end and a second end. The core body has a plurality of protrusions protruding from the inner peripheral surface of the hollow tubular body on each of the first end side and the second end side. The number of protrusions on the first end side is different from the number of protrusions on the second end side.

Effects of the Invention

[0007] By following this disclosure, it is possible to prevent the winding body from being incorrectly attached to the support shaft. [Brief explanation of the drawing]

[0008] [Figure 1] This is a schematic diagram of the packaging device. [Figure 2] This is a perspective view of a packaging material roll. [Figure 3] This is a perspective view of the core body from one end. [Figure 4] This is a cross-sectional view showing the structure of the inner surface of the core body. [Figure 5] This is a front view of the core body as seen from one end. [Figure 6] This is a perspective view of the core body from the other end. [Figure 7] This is a front view of the core body as seen from the other end. [Figure 8] This is a front view showing a packaging roll attached to a support shaft. [Figure 9] This is a perspective view of the support axis. [Figure 10] This is a front view of the support shaft. [Figure 11] This is a perspective view showing the core body mounted on the support shaft. [Figure 12] This is a front view showing the core body mounted on the support shaft. [Figure 13] This is a side view showing the core body mounted on the support shaft. [Figure 14] This is a front view showing a packaging roll attached to another support shaft. [Figure 15] This is a perspective view of another support axis. [Figure 16] This is a front view of another support shaft. [Figure 17] This is a perspective view showing the core body attached to another support shaft. [Figure 18] This is a front view showing the core body attached to another support shaft. [Figure 19] This is a side view showing the core body attached to another support shaft. [Figure 20]It is a schematic diagram showing the arrangement of the light-shielding plate when the core body is not attached to the support shaft. [Figure 21] It is a schematic diagram showing the arrangement of the light-shielding plate when the core body is attached to the support shaft. [Figure 22] It is a flowchart showing a first example of a method for manufacturing a wound body. [Figure 23] It is a diagram schematically showing a first example of a method for manufacturing a wound body. [Figure 24] It is a flowchart showing a second example of a method for manufacturing a wound body. [Figure 25] It is a diagram schematically showing a second example of a method for manufacturing a wound body.

Mode for Carrying Out the Invention

[0009] Hereinafter, embodiments will be described based on the drawings. In the following description, the same parts and components are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed descriptions thereof will not be repeated. In the drawings, for convenience of explanation, the configuration may be omitted or simplified. It is also initially planned that any configuration is extracted from the embodiments and they are arbitrarily combined.

[0010] <Schematic Configuration of Packaging Device 1> FIG. 1 is a schematic configuration diagram of a packaging device 1 according to an embodiment. The packaging device 1 is used for packaging an object to be packaged. The object to be packaged is a drug, specifically a solid drug. Examples of solid drugs include powders, granules, tablets, pills, and capsules. The object to be packaged is not limited to solid drugs. The object to be packaged may be a semi-solid drug or a liquid drug. The object to be packaged is not limited to drugs, and for example, it may be a sterilized product, and the packaging device 1 may be used for packaging a sterilized product as the object to be packaged.

[0011] Packaging device 1 is a drug packaging device for packaging drugs based on a prescription. A prescription is issued by a doctor to a patient. The prescription contains patient information and drug information. Patient information includes the patient's name and age. Drug information includes the drug name, quantity, usage, and dosage. Packaging device 1 is used to package the drug into single-dose portions based on such a prescription.

[0012] The packaging device 1 is equipped with two support shafts 200 and 300. A packaging roll 2 is attached to the support shaft 200. The packaging roll 2 is a "winding body" in which the packaging material 21 is wound in a roll shape. The packaging material 21 is fed out from the packaging roll 2. A packaging roll 3 is attached to the support shaft 300. The packaging roll 3 is a "winding body" in which the packaging material 31 is wound in a roll shape. The packaging material 31 is fed out from the packaging roll 3. The packaging materials 21 and 31 have a base material made of paper or film, and a sealing layer made of a low-melting-point material laminated on the base material. One of the pair of support shafts 200 and 300 corresponds to an example of a "first support shaft" and the other corresponds to an example of a "second support shaft".

[0013] The packaging device 1 combines packaging material 21 unwound from packaging material roll 2 and packaging material 31 unwound from packaging material roll 3 by heat sealing to form a sachet bag 19 containing the drug. The packaging materials 21 and 31 are in the form of long sheets. The packaging device 1 is equipped with a packaging material conveying unit 9. The packaging material conveying unit 9 applies driving force to the packaging materials 21 and 31 to convey them. The packaging materials 21 and 31 are conveyed in their longitudinal direction. The arrows in Figure 1 indicate the conveying direction DR of the packaging materials 21 and 31.

[0014] Guide rollers 11A, 12A, and 13A are provided in order from upstream (closer to the packaging roll 2) to downstream (away from the packaging roll 2) in the conveying direction DR of the packaging material 21. Guide rollers 11A, 12A, and 13A guide the conveyed packaging material 21 and also have the function of applying a constant tension to the packaging material 21. Guide rollers 11B, 12B, and 13B are provided in order from upstream (closer to the packaging roll 3) to downstream (away from the packaging roll 3) in the conveying direction DR of the packaging material 31. Guide rollers 11B, 12B, and 13B guide the conveyed packaging material 31 and also have the function of applying a constant tension to the packaging material 31.

[0015] The packaging device 1 includes a packaging section 5. The packaging section 5 includes a drug supply section 6, a storage section forming section 7, and a perforation forming section 8.

[0016] The drug supply unit 6 supplies the drug between the packaging materials 21 and 31 being transported by the packaging material transport unit 9. The tip of a hopper (not shown) is positioned between packaging materials 21 and 31, and the drug is dispensed from the tip of the hopper between packaging materials 21 and 31. The drug is supplied in single-dose portions based on the prescription.

[0017] The storage section forming section 7 forms a storage section using packaging materials 21 and 31 transported by the packaging material transport section 9. The drug is stored in the storage section. After the drug is supplied from the drug supply section 6, the storage section forming section 7 heat-seals the seal layer of packaging material 21 and the seal layer of packaging material 31 to create individual packaging, forming a sachet bag 19 which is a package containing the drug inside.

[0018] The perforation forming section 8 is provided in the storage section forming section 7. The perforation forming section 8 forms perforations in the packaging materials 21 and 31 transported by the packaging material transport section 9, extending in a direction perpendicular to the transport direction DR. The perforations consist of multiple pores arranged continuously in the short-side direction of the packaging materials 21 and 31. The perforations are formed in the sealed portions where the seal layers of the packaging materials 21 and 31 are heat-fused together. The perforations are formed at positions that separate adjacent individual packaging bags 19 in the longitudinal direction of the packaging materials 21 and 31. By tearing the packaging materials 21 and 31 along the perforations, adjacent individual packaging bags 19 can be easily separated.

[0019] The packaging device 1 further includes a printing unit 4. The printing unit 4 prints predetermined information onto the packaging material 31, which is unwound from the packaging material roll 3 and transported by the packaging material transport unit 9. The predetermined information is information related to the drug. The printing unit 4 is located upstream of the packaging unit 5 in the transport direction of the packaging material 31. The printing unit 4 prints information related to the drug onto the packaging material 31 prior to the heat sealing of the packaging materials 21 and 31 by the containment unit forming unit 7. Information related to the drug may include the patient's name, timing of administration, drug name, and quantity.

[0020] <Packaging rolls 2, 3> Figure 2 is a perspective view of the packaging rolls 2 and 3. The packaging rolls 2 and 3 are wound bodies formed by winding long sheet-like packaging materials 21 and 31 around a core body 100. The packaging materials 21 and 31 correspond to examples of "wound materials" wound around the core body 100. Note that the "wound materials" are not limited to packaging materials and may include, for example, an ink ribbon. The core body 100 is a hollow tubular body. The core body 100 has a roughly hollow cylindrical shape.

[0021] Packaging rolls 2 and 3 can be manufactured by winding packaging materials 21 and 31 around the same core 100. The packaging materials 21 and 31 are wound in the same direction around the same core 100. When viewed from one end of the core 100, the packaging materials 21 and 31 are wound counterclockwise. When viewed from the other end of the core 100, the packaging materials 21 and 31 are wound clockwise. The winding bodies are appropriately attached to the support shafts 200 and 300 shown in Figure 1, either from one end or the other end of the core 100. This allows the packaging roll 2 shown in Figure 1 to be rotated counterclockwise to unwind the packaging material 21, and the packaging roll 3 shown in Figure 1 to be rotated clockwise to unwind the packaging material 31.

[0022] The core 100 is reusable. The core 100 may be reused after the packaging materials 21 and 31 that were previously wound around it have been used up. The core 100 can be reused by rewinding the packaging materials 21 and 31 onto the core 100 after they have been used up, or by inserting the core 100 into another core that has the packaging materials 21 and 31 wound around it.

[0023] <Core 100> The details of the core body 100's structure will now be described. Figure 3 is a perspective view of the core body 100 from one end 101. Figure 4 is a cross-sectional view showing the structure of the inner circumferential surface 120 of the core body 100. Figure 5 is a front view of the core body 100 from one end 101. Figure 6 is a perspective view of the core body 100 from the other end 111. Figure 7 is a front view of the core body 100 from the other end 111. Figure 5 shows the core body 100 as seen in the direction of arrow V shown in Figures 3 and 6. Figure 7 shows the core body 100 as seen in the direction of arrow VII shown in Figures 3 and 6.

[0024] The core body 100 has the shape of a hollow tube having one end 101 and the other end 111. One of the two ends, 101 and 111, corresponds to an example of a "first end" and the other corresponds to an example of a "second end". The core body 100 has a cylindrical inner circumferential surface 120.

[0025] The core body 100 has a tapered surface 102. The tapered surface 102 has the shape of the side surface of a frustocone. The tapered surface 102 is inclined so that it approaches the central axis of the hollow tubular core body 100 as it approaches the other end 111 from one end 101 of the core body 100. The tapered surface 102 is inclined with respect to the axial direction of the core body 100 and is inclined with respect to the radial direction of the core body 100. Because the tapered surface 102 is provided, the inner diameter of the core body 100 expands from the inner circumferential surface 120 toward the one end 101.

[0026] At the boundary between the tapered surface 102 and the inner circumferential surface 120, a portion of both the tapered surface 102 and the inner circumferential surface 120 is recessed, forming a circumferential recess 103. The circumferential recess 103 extends in the circumferential direction of the hollow tubular core body 100. A convex portion 104 is provided between adjacent circumferential recesses 103 in the circumferential direction. Since the convex portion 104 is a portion of the tapered surface 102 and the inner circumferential surface 120 that is not recessed, it protrudes radially inward from the core body 100 relative to the circumferential recess 103.

[0027] As shown in Figure 5, the core body 100 has six circumferential recesses 103. The six circumferential recesses 103 are formed at equal intervals in the circumferential direction of the core body 100. Therefore, the core body 100 is provided with six protrusions 104, and the six protrusions 104 are arranged at equal intervals in the circumferential direction of the core body 100.

[0028] The core body 100 has a tapered surface 112. The tapered surface 112 has the shape of the side surface of a frustocone. The tapered surface 112 is inclined so that it approaches the central axis of the hollow tubular core body 100 as it moves from the other end 111 towards the one end 101. The tapered surface 112 is inclined with respect to the axial direction of the core body 100 and is inclined with respect to the radial direction of the core body 100. Because the tapered surface 112 is provided, the inner diameter of the core body 100 expands from the inner circumferential surface 120 toward the other end 111.

[0029] At the boundary between the tapered surface 112 and the inner circumferential surface 120, a portion of both the tapered surface 112 and the inner circumferential surface 120 is recessed, forming a circumferential recess 113. The circumferential recess 113 extends in the circumferential direction of the hollow tubular core body 100. A convex portion 114 is provided between adjacent circumferential recesses 113 in the circumferential direction. Since the convex portion 114 is the portion of the tapered surface 112 and the inner circumferential surface 120 that is not recessed, it protrudes radially inward from the core body 100 relative to the circumferential recess 113.

[0030] As shown in Figure 7, the core body 100 has four circumferential recesses 113. The four circumferential recesses 113 are formed at equal intervals in the circumferential direction of the core body 100. Therefore, the core body 100 is provided with four protrusions 114, and the four protrusions 114 are arranged at equal intervals in the circumferential direction of the core body 100.

[0031] The core body 100 has a first ridge section 130, a second ridge section 140, a third ridge section 150, and a fourth ridge section 160. The first ridge section 130, the second ridge section 140, the third ridge section 150, and the fourth ridge section 160 protrude from the inner circumferential surface 120 and project radially inward relative to the inner circumferential surface 120 of the core body 100. The first ridge section 130, the second ridge section 140, the third ridge section 150, and the fourth ridge section 160 extend in the axial direction of the core body 100. As shown in Figures 5 and 7, the core body 100 has four first ridge sections 130, two second ridge sections 140, four third ridge sections 150, and two fourth ridge sections 160.

[0032] In the circumferential direction of the core body 100, the first ridge portion 130 is adjacent to the second ridge portion 140 and adjacent to the third ridge portion 150. In the circumferential direction, the first ridge portion 130 is positioned between the second ridge portion 140 and the third ridge portion 150. Between the first ridge portion 130 and the second ridge portion 140, and between the first ridge portion 130 and the third ridge portion 150, there are portions where the inner circumferential surface 120 does not protrude. The first ridge portion 130 has a one-side ridge end 131, which is the end on the one end 101 side, and a other-side ridge end 132, which is the end on the other end 111 side. Near the one-side ridge end 131, the first ridge portion 130 has a projection 133 that has the greatest projection height from the inner circumferential surface 120.

[0033] In the circumferential direction of the core body 100, the second ridge portion 140 is adjacent to the first ridge portion 130. In the circumferential direction, the second ridge portion 140 is positioned between the two first ridge portions 130. Between the first ridge portion 130 and the second ridge portion 140, there is a portion where the inner circumferential surface 120 does not protrude. The second ridge portion 140 has a one-side ridge end 141, which is the end on the one end 101 side, and a other-side ridge end 142, which is the end on the other end 111 side. Near the other-side ridge end 142, the second ridge portion 140 has a projection 143 that has the greatest projection height from the inner circumferential surface 120.

[0034] In the circumferential direction of the core body 100, the third ridge portion 150 is adjacent to the first ridge portion 130 and adjacent to the fourth ridge portion 160. In the circumferential direction, the third ridge portion 150 is positioned between the first ridge portion 130 and the fourth ridge portion 160. Between the first ridge portion 130 and the third ridge portion 150, and between the third ridge portion 150 and the fourth ridge portion 160, there are portions where the inner circumferential surface 120 does not protrude. The third ridge portion 150 has a one-side ridge end 151, which is the end on the one end 101 side, and a other-side ridge end 152, which is the end on the other end 111 side. The protrusion height from the inner circumferential surface 120 of the third ridge portion 150 is equal from the one-side ridge end 151 to the other-side ridge end 152.

[0035] In the circumferential direction of the core body 100, the fourth ridge portion 160 is adjacent to the third ridge portion 150. In the circumferential direction, the fourth ridge portion 160 is positioned between the two third ridge portions 150. Between the third ridge portion 150 and the fourth ridge portion 160, there is a portion where the inner circumferential surface 120 does not protrude. The fourth ridge portion 160 has one side ridge end 161, which is the end on the one end 101 side, and the other side ridge end 162, which is the end on the other end 111 side. The projection height from the inner circumferential surface 120 of the fourth ridge portion 160 is equal from the one side ridge end 161 to the other side ridge end 162.

[0036] The first ridge 130 has a projection 133 that protrudes high from the inner circumferential surface 120 in only a portion of its extending direction. The second ridge 140 has a projection 143 that protrudes high from the inner circumferential surface 120 in only a portion of its extending direction. The third ridge 150 and the fourth ridge 160 have a uniform projection height throughout. Unlike the first ridge 130 and the second ridge 140, the third ridge 150 and the fourth ridge 160 do not have a projection that protrudes high in only a portion of their length.

[0037] The fourth ridge 160 has a greater protrusion height from the inner surface 120 compared to the third ridge 150. The height to which the fourth ridge 160 protrudes from the inner surface 120 is equal to the height to which the projection 133 of the first ridge 130 and the projection 143 of the second ridge 140 protrude from the inner surface 120. The height to which the third ridge 150, the first ridge 130 excluding the projection 133 and the surrounding raised portion, and the second ridge 140 excluding the projection 143 and the surrounding raised portion are equal to the height to which they protrude from the inner surface 120.

[0038] The projections 133 of the first furrow section 130 and the one-sided furrow end 161 of the fourth furrow section 160 protrude from the inner circumferential surface 120 near one end 101 of the core body 100, and correspond to the "projections on the side of one end 101". The four projections 133 of the four first furrow sections 130 and the two one-sided furrow ends 161 of the two fourth furrow sections 160 constitute the projections on the side of one end 101. The core body 100 has multiple projections on the side of one end 101, specifically six.

[0039] As shown in Figure 5, the six projections on one end 101 and the six protrusions 104 are located at the same position in the circumferential direction of the core body 100. The six projections on one end 101 are arranged at equal intervals in the circumferential direction of the core body 100. In the circumferential direction, the projections on one end 101 and the circumferential recesses 103 are located at different positions. In the circumferential direction, the second ridges 140 and the third ridges 150 are located in positions that overlap with the circumferential recesses 103. As shown in Figure 3, in the axial direction of the core body 100, the six projections on one end 101 are located further from the one end 101 than the tapered surface 102. The circumferential recesses 103 and the protrusions 104 are formed closer to the one end 101 than the six projections on one end 101.

[0040] The projection 143 of the second furrow section 140 and the other side furrow end 162 of the fourth furrow section 160 protrude from the inner circumferential surface 120 near the other end 111 of the core body 100, and correspond to the "projection on the other end 111 side". The two projections 143 of the two second furrow sections 140 and the two other side furrow ends 162 of the two fourth furrow sections 160 constitute the projection on the other end 111 side. The core body 100 has multiple projections on the other end 111 side, specifically four.

[0041] As shown in Figure 7, the four projections on the other end 111 and the four protrusions 114 are located at the same position in the circumferential direction of the core body 100. The four projections on the other end 111 are arranged at equal intervals in the circumferential direction of the core body 100. In the circumferential direction, the projections on the other end 111 and the circumferential recesses 113 are located at different positions. In the circumferential direction, the first ridge 130 and the third ridge 150 are located in positions that overlap with the circumferential recesses 113. As shown in Figure 6, in the axial direction of the core body 100, the four projections on the other end 111 are located further from the other end 111 than the tapered surface 112. The circumferential recesses 113 and the protrusions 114 are located closer to the other end 111 than the four projections on the other end 111.

[0042] The number of protrusions on one end 101 of the core body 100 (6 in this embodiment) is different from the number of protrusions on the other end 111 of the core body 100 (4 in this embodiment). The number of protrusions on the other end 111 of the core body 100 (4) is not a divisor of the number of protrusions on the one end 101 of the core body 100 (6).

[0043] The projection 133 of the first ridge 130 constitutes one of a plurality of projections on one end 101 of the core body 100. The projection 143 of the second ridge 140 constitutes one of a plurality of projections on the other end 111 of the core body 100. The projections 133 and 143 are positioned at different locations in the circumferential direction of the core body 100, as shown in Figure 4.

[0044] One side ridge end 161 of the fourth ridge section 160 constitutes one of the multiple protrusions on the side of one end 101 of the core body 100. The other side ridge end 162 of the fourth ridge section 160 constitutes one of the multiple protrusions on the side of the other end 111 of the core body 100. The one side ridge end 161 and the other side ridge end 162 of the fourth ridge section 160 are located at the same position in the circumferential direction of the core body 100.

[0045] The multiple projections on one end 101 include projections that are in the same position circumferentially as the projections on the other end 111, and projections that are in different positions circumferentially as the projections on the other end 111. The multiple projections on the other end 111 include projections that are in the same position circumferentially as the projections on the one end 101, and projections that are in different positions circumferentially as the projections on the one end 101. The projections on one end 101 and the projections on the other end 111, which are located in the same position circumferentially, are formed by the one side ridge end 161 and the other side ridge end 162 of the fourth ridge portion 160 that extends in the axial direction.

[0046] The core body 100 has a cylindrical outer surface. As shown in Figure 4, a part of the outer surface of the core body 100 is recessed to form a housing portion 170. The housing portion 170 is covered with a lid 171. A recording medium 172 is housed inside the housing portion 170. The core body 100 has the recording medium 172.

[0047] The recording medium 172 includes non-volatile memory and stores information. The information stored in the recording medium 172 includes remaining amount information indicating the remaining amount of packaging material 21, 31 wound around the core body 100. The recording medium 172 may also store other information, such as the paper quality of the packaging material 21, 31 and the set temperature when heat-sealing the packaging material 21, 31. The recording medium 172 may be, for example, an IC tag (RFID (Radio Frequency Identification) tag).

[0048] During the manufacturing of the packaging rolls 2 and 3, the recording medium 172 may record the lot number, manufacturing date, customer information, paper quality information of the packaging materials 21 and 31, remaining quantity information, etc. In the case of new packaging rolls 2 and 3, the remaining quantity information will be the amount of packaging material 21 and 31 wound around the core 100 in the new packaging rolls 2 and 3. After the packaging rolls 2 and 3 are mounted on the packaging device 1, the recording medium 172 may also record the start date and time of use, environmental information, etc.

[0049] <Support shaft 200> The details of the support shaft 200's configuration will now be explained. Figure 8 is a front view showing the packaging roll 2 attached to the support shaft 200. The packaging roll 2 is mounted to the support shaft 200 by inserting the support shaft 200 into the core body 100. Figure 9 is a perspective view of the support shaft 200. Figure 10 is a front view of the support shaft 200. Figure 10 shows the support shaft 200 as viewed in the direction of arrow X shown in Figure 9.

[0050] The support shaft 200 has a tip surface 201. The tip surface 201 has a planar shape. When viewed in the axial direction of the support shaft 200, the tip surface 201 has a circular shape. The support shaft 200 has a base end 202. The outer circumferential surface of the base end 202 has a cylindrical shape. The opposing surface 203 is a part of the surface of the support shaft 200 that faces the end surface of the core body 100, specifically the other end 111, when the core body 100 is mounted on the support shaft 200. The tapered surface 204 is a part of the surface of the support shaft 200 that faces the tapered surface of the core body 100, specifically the tapered surface 112 on the other end 111 side, when the core body 100 is mounted on the support shaft 200.

[0051] The tapered surface 204 has the shape of the side surface of a frustocone. The tapered surface 204 is inclined with respect to the axial direction of the support shaft 200 and with respect to the radial direction of the support shaft 200. The tapered surface 204 is inclined to approach the central axis of the support shaft 200 as it approaches the tip surface 201 from the base end 202 of the support shaft 200.

[0052] The support shaft 200 has a tip-side outer circumferential surface 210. The tip-side outer circumferential surface 210 has a roughly cylindrical shape. The tip-side outer circumferential surface 210 is a part of the surface of the support shaft 200 that extends axially from the edge of the tip surface 201 toward the base end 202.

[0053] The support shaft 200 has a protruding member 211. The protruding member 211 has, for example, a spherical outer shape. The protruding member 211 protrudes radially outward from the tip-side outer circumferential surface 210. The protruding member 211 is configured so that its protrusion height relative to the tip-side outer circumferential surface 210 can be changed. The protruding member 211 is supported by a biasing member such as a spring. The biasing member is positioned radially inward from the tip-side outer circumferential surface 210, at a position not shown in Figures 9 and 10. The biasing member extends radially from the support shaft 200 and biases the protruding member 211 radially outward from the support shaft 200.

[0054] The protruding end of the protruding member 211, which protrudes from the outer circumferential surface 210 on the tip side, is pressed toward the outer circumferential surface 210 on the tip side, thereby reducing the protruding height of the protruding member 211 relative to the outer circumferential surface 210 on the tip side. At this time, the biasing member is contracted, and the dimensions of the biasing member in the radial direction of the support shaft 200 are reduced.

[0055] The support shaft 200 has a base end outer circumferential surface 220. The base end outer circumferential surface 220 has a roughly cylindrical shape. The base end outer circumferential surface 220 is connected to a tapered surface 204. In the portion where the tapered surface 204 is provided, the outer diameter of the support shaft 200 increases from the base end outer circumferential surface 220 toward the base end 202.

[0056] The base end outer circumferential surface 220 is positioned closer to the base end 202 than the tip end outer circumferential surface 210 in the axial direction of the support shaft 200. The outer diameter of the tip end outer circumferential surface 210 and the outer diameter of the base end outer circumferential surface 220 may be different. The outer diameter of the base end outer circumferential surface 220 may be larger than the outer diameter of the tip end outer circumferential surface 210. The member having the tip end surface 201 and the tip end outer circumferential surface 210 and the member having the base end outer circumferential surface 220 may be different members.

[0057] The support shaft 200 has multiple, specifically four, raised portions 230 that protrude radially outward from the base end outer circumferential surface 220. The four raised portions 230, which have the same shape, are arranged at equal intervals in the circumferential direction of the support shaft 200. The protruding member 211 protrudes from the tip end outer circumferential surface 210, and the raised portions 230 are provided on the base end outer circumferential surface 220, so the protruding member 211 is positioned closer to the tip surface 201 than the raised portions 230.

[0058] Groove-shaped portions 260 are formed between adjacent raised portions 230 in the circumferential direction of the support shaft 200. The raised portions 230 are raised from the base end outer circumferential surface 220, and the base end outer circumferential surface 220 is not raised in the groove-shaped portions 260, so the groove-shaped portions 260 have a shape that is recessed radially inward relative to the raised portions 230. The groove-shaped portions 260 have a groove-like shape that extends in the axial direction of the support shaft 200. Since the base end outer circumferential surface 220 has four raised portions 230, the number of groove-shaped portions 260 formed between the raised portions 230 is also the same as the number of raised portions 230, which is four. As shown in Figure 10, the groove-shaped portions 260 are arranged at equal intervals in the circumferential direction of the support shaft 200.

[0059] The raised portion 230 has a plurality of extensions. Specifically, the raised portion 230 has a first extension 231, a second extension 233, and a third extension 235. The first extension 231 is provided in the central part of the raised portion 230 in the circumferential direction of the support shaft 200 and extends in the axial direction of the support shaft 200. The second extension 233 is provided along one edge of the raised portion 230 in the circumferential direction of the support shaft 200 and extends in the axial direction of the support shaft 200. The third extension 235 is provided along the other edge of the raised portion 230 in the circumferential direction of the support shaft 200 and extends in the axial direction of the support shaft 200.

[0060] The raised portion 230 has a shallow groove portion 241 formed between the first extended portion 231 and the second extended portion 233 which are adjacent in the circumferential direction of the support shaft 200. The raised portion 230 has a shallow groove portion 242 formed between the first extended portion 231 and the third extended portion 235 which are adjacent in the circumferential direction of the support shaft 200.

[0061] The first extension 231 has a tip 232. The tip 232 is the end of the first extension 231 closest to the tip surface 201 in the axial direction of the support shaft 200, and is on the tip surface 201 side. The second extension 233 has an inclined end 234. The inclined end 234 is the end of the second extension 233 closest to the tip surface 201 in the axial direction of the support shaft 200, and is on the tip surface 201 side. The third extension 235 has an inclined end 236. The inclined end 236 is the end of the third extension 235 closest to the tip surface 201 in the axial direction of the support shaft 200, and is on the tip surface 201 side.

[0062] The tip 232 and the inclined ends 234, 236 are inclined with respect to the axial direction of the support shaft 200 and with respect to the circumferential direction of the support shaft 200. A portion of the tip 232 and the inclined end 234 are inclined with respect to the axial direction of the support shaft 200 so as they approach the base end 202, they approach the shallow groove 241. Another portion of the tip 232 and the inclined end 236 are inclined with respect to the axial direction of the support shaft 200 so as they approach the base end 202, they approach the shallow groove 242.

[0063] The raised portion 230 further has a guide portion 245. The guide portion 245 has a protruding end 246 and a pair of inclined portions 247 and 248. The protruding end 246 is the end of the raised portion 230 closest to the tip surface 201 in the axial direction of the support shaft 200, and is on the tip surface 201 side. The inclined portions 247 and 248 are inclined with respect to the axial direction of the support shaft 200 and are inclined with respect to the circumferential direction of the support shaft 200. The inclined portions 247 and 248 are inclined with respect to the axial direction of the support shaft 200 such that they approach the groove-shaped portion 260 as they move from the tip to the base end of the support shaft 200.

[0064] The raised portion 230 of the support shaft 200 has a shape symmetrical with respect to a hypothetical straight line extending in the axial direction of the support shaft 200, passing through the tip 246 of the guide portion 245. The pair of inclined portions 247 and 248 of the raised portion 230 have a symmetrical shape. The tip 246 is located in the central part of the raised portion 230 in the circumferential direction of the support shaft 200. The tip 246 is positioned in the circumferential direction of the support shaft 200, overlapping with the first extending portion 231.

[0065] The protruding member 211 is positioned to overlap with the raised portion 230 in the circumferential direction of the support shaft 200. The protruding member 211 is positioned to overlap with the center line of the raised portion 230 in the circumferential direction of the support shaft 200. The protruding member 211 is positioned to overlap with the tip portion 246 of the raised portion 230 in the circumferential direction of the support shaft 200. The protruding member 211 is positioned to overlap with the first extending portion 231 of the raised portion 230 in the circumferential direction of the support shaft 200. As shown in Figure 10, when the support shaft 200 is viewed axially from the side of the tip surface 201, the first extending portion 231 is hidden by the protruding member 211 and is not visible, while the shallow groove portions 241 and 242 are not hidden by the protruding member 211 and are exposed and visible.

[0066] The raised portion 230 further has a circumferential projection 250 at the position closest to the base end portion 202 in the axial direction of the support shaft 200. The circumferential projection 250 extends in the circumferential direction of the support shaft 200 over the entire length of one raised portion 230. The circumferential projection 250 is the portion of the raised portion 230 that has the greatest height protruding from the base end outer circumferential surface 220. The circumferential projection 250 protrudes higher from the base end outer circumferential surface 220 compared to the first extension portion 231, the second extension portion 233, and the third extension portion 235.

[0067] Of the four groove-shaped sections 260, two groove-shaped sections 260 that are not adjacent in the circumferential direction have a widened section 262 at the end on the base end 202 side, which widens the circumferential width of the support shaft 200. In the circumferential direction of the support shaft 200, groove-shaped sections 260 with the widened section 262 and groove-shaped sections 260 without the widened section are arranged alternately.

[0068] The pressed portion 271 is positioned at the same location as the wide portion 262 in the circumferential direction of the support shaft 200. In the state shown in Figures 9 and 10, where the core body 100 is not mounted on the support shaft 200, the pressed portion 271 is located inside the wide portion 262. The pressed portion 271 and the movable portion 272 are made of a single component and are configured to reciprocate integrally in the axial direction of the support shaft 200. The pressed portion 271 and the movable portion 272 are biased toward the end surface 201 along the axial direction of the support shaft 200. Because the wide portion 262 has a wide shape, the pressed portion 271 abuts against the raised portion 230, thereby positioning the pressed portion 271 in the axial direction.

[0069] <Attaching the core body 100 to the support shaft 200> Figure 11 is a perspective view showing the core body 100 mounted on the support shaft 200. Figure 12 is a front view showing the core body 100 mounted on the support shaft 200. Figure 13 is a side view showing the core body 100 mounted on the support shaft 200. Figure 12 shows the core body 100 and support shaft 200 as seen in the direction of arrow XII shown in Figures 11 and 13. Figure 13 shows the core body 100 and support shaft 200 as seen in the direction of arrow XIII shown in Figure 12. In Figures 11 to 13, the packaging material 21 is omitted from the illustration.

[0070] The core body 100 is attached to the support shaft 200 from the side of the other end 111, of which it has one end 101 and the other end 111. As shown in Figure 13, the opposing surface 203 of the support shaft 200 faces the other end 111 of the core body 100 with a gap between them. The tapered surface 112 on the other end 111 side of the core body 100 and the tapered surface 204 of the support shaft 200 are in surface contact with at least a portion of each other.

[0071] As shown in Figures 9 and 10, the support shaft 200 has four groove-shaped portions 260. As shown in Figures 3 and 5, the core body 100 has six projections on one end 101. As shown in Figures 6 and 7, the core body 100 has four projections on the other end 111. The number of projections on one end 101 of the core body 100 is different from the number of projections on the other end 111. The support shaft 200 has the same number of groove-shaped portions 260 as the number of projections on the other end 111 of the core body 100.

[0072] Even if one attempts to attach the core body 100 to the support shaft 200 from one end 101, the number of groove-shaped portions 260 and the number of protrusions on the one end 101 are different, making it impossible to move the protrusions on the one end 101 into the groove-shaped portion 260. Therefore, it is impossible to attach the core body 100 to the support shaft 200 from the one end 101. On the other hand, since the number of groove-shaped portions 260 and the number of protrusions on the other end 111 are equal, all of the protrusions on the other end 111 can be moved into the groove-shaped portion 260, making it possible to attach the core body 100 to the support shaft 200 from the other end 111.

[0073] The number of protrusions on one end 101 of the core body 100 is made different from the number of protrusions on the other end 111, while the number of groove-shaped portions 260 on the support shaft 200 is made the same as the number of protrusions on the other end 111 of the core body 100. This realizes a configuration in which the core body 100 can only be attached to the support shaft 200 from the other end 111 side. By making it physically impossible to attach the core body 100 to the support shaft 200 from the one end 101 side, it is possible to prevent the winding body from being incorrectly attached to the support shaft 200.

[0074] When the number of protrusions on one end 101 of the core body 100 is different from the number of protrusions on the other end 111, the number of protrusions on the one end 101 is not a divisor of the number of groove-shaped portions 260 of the support shaft 200 (i.e., the number of protrusions on the other end 111). If the number of protrusions on the one end 101 is a divisor (for example, 2) of the number of protrusions on the other end 111 (4 in this embodiment), then all of the protrusions on the one end 101 can be moved into the four groove-shaped portions 260 of the support shaft 200. By making the number of protrusions on the one end 101 a number that is not a divisor of the number of protrusions on the other end 111, it is possible to make it impossible to reliably attach the core body 100 to the support shaft 200 from the one end 101 side.

[0075] When attaching the core body 100 to the support shaft 200 from the other end 111 side, the core body 100 and the support shaft 200 rotate relative to each other in order to align the projection and groove-shaped portion 260 on the other end 111 side in the circumferential direction. Typically, the support shaft 200 rotates relative to the core body 100, which moves in the axial direction. If the number of projections and groove-shaped portions 260 on the other end 111 side is small, this rotation angle becomes large. If the number of projections and groove-shaped portions 260 on the other end 111 side is set to 4, the rotation angle of the support shaft 200 relative to the core body 100 when attaching the core body 100 to the support shaft 200 from the other end 111 side can be limited to a maximum of 45°. This makes it easier to attach the core body 100 to the support shaft 200.

[0076] As shown in Figure 4, the projection 133 on one end 101 of the core body 100 and the projection 143 on the other end 111 are positioned at different locations in the circumferential direction of the core body 100. The projection on the other end 111 of the core body 100 and the groove-shaped portion 260 of the support shaft 200 can be aligned in the circumferential direction, allowing all of the projection on the other end 111 to be moved into the groove-shaped portion 260. On the other hand, the projection on the one end 101 of the core body 100 and the groove-shaped portion 260 of the support shaft 200 cannot be aligned in the circumferential direction, so the projection on the one end 101 cannot be moved into the groove-shaped portion 260. This ensures that a configuration can be reliably achieved in which the core body 100 can only be attached to the support shaft 200 from the other end 111 side.

[0077] As shown in Figure 10, the groove-shaped portions 260 of the support shaft 200 are arranged at equal intervals in the circumferential direction of the support shaft 200. By arranging the groove-shaped portions 260 at equal intervals and by having a different number of protrusions on one end 101 of the core body 100 and the other end 111, it is possible to reliably realize a configuration in which only the protrusions on the other end 111 can be aligned with the groove-shaped portions 260.

[0078] As shown in Figure 4, the core body 100 has a fourth ridge portion 160 that protrudes from the inner circumferential surface 120 and extends in the axial direction of the core body 100. One side ridge end 161 of the fourth ridge portion 160 constitutes one of the projections on the side of one end 101 of the core body 100. The other side ridge end 162 of the fourth ridge portion 160 constitutes one of the projections on the side of the other end 111 of the core body 100. A portion of the projections on the side of one end 101 of the core body 100 and a portion of the projections on the side of the other end 111 are formed by the two ends of the fourth ridge portion 160 and are arranged at the same position in the circumferential direction of the core body 100. This improves the ease of manufacturing the core body 100. By providing the rib-shaped fourth ridge portion 160 that protrudes from the inner circumferential surface 120, the strength of the core body 100 can be increased.

[0079] As shown in Figure 4, the core body 100 has a tapered surface 112 on the other end 111 side that approaches the central axis of the core body 100 as it moves from the other end 111 towards the one end 101. Since the inner diameter of the core body 100 is increased at the other end 111, interference between the core body 100 and the support shaft 200 is suppressed, and the operation of inserting the support shaft 200 into the core body 100 is made easier.

[0080] As shown in Figure 9, the support shaft 200 has a tapered surface 204 that slopes radially outward from the tip surface 201 towards the base end 202. When the core body 100 is mounted on the support shaft 200, the tapered surface 112 of the core body 100 and the tapered surface 204 of the support shaft 200 come into contact, making it easy to align the central axes of the core body 100 and the support shaft 200.

[0081] As shown in Figures 4 and 6, the projection on the other end 111 of the core body 100 is positioned further away from the other end 111 than the tapered surface 112. The arrangement of the projection on the other end 111 and the tapered surface 112 is determined so that when the core body 100 is mounted onto the support shaft 200 from the other end 111 side, the tapered surface 112 engages with the support shaft 200 before the projection on the other end 111 side. This prevents the projection on the other end 111 of the core body 100 from contacting the tip surface 201 of the support shaft 200, which would hinder the mounting of the core body 100 onto the support shaft 200, and makes it easier to insert the support shaft 200 into the core body 100.

[0082] As shown in Figures 6 and 7, a circumferential recess 113 is formed in which a part of the inner circumferential surface 120 is recessed, closer to the other end 111 of the core body 100 than the projection on the other end 111. As shown in Figure 9, the support shaft 200 has a circumferential protrusion 250 that rises from the outer circumferential surface 220 on the base end side. When the core body 100 is mounted on the support shaft 200, the circumferential recess 113 of the core body 100 accommodates the circumferential protrusion 250 of the support shaft 200. This prevents the circumferential protrusion 250 rising from the outer circumferential surface 220 on the base end side of the support shaft 200 from hindering the mounting of the core body 100 onto the support shaft 200, and allows the support shaft 200 to be easily inserted into the core body 100.

[0083] As shown in Figures 6 and 7, the core body 100 has protrusions 114 between adjacent circumferential recesses 113 in the circumferential direction. As shown in Figures 9 and 10, groove-shaped portions 260 are formed between adjacent circumferential protrusions 250 in the circumferential direction of the support shaft 200. The groove-shaped portions 260 extend in the axial direction of the support shaft 200. When the core body 100 is mounted on the support shaft 200, the protrusions 114 can be moved axially along the groove-shaped portions 260, thereby ensuring that the circumferential protrusions 250 of the support shaft 200 are securely housed inside the circumferential recesses 113 of the core body 100 when mounted.

[0084] As shown in Figures 6 and 7, the projection on the other end 111 side of the core body 100 and the circumferential recess 113 are positioned at different locations in the circumferential direction of the core body 100. The support shaft 200 has multiple raised portions 230 that protrude from the outer peripheral surface 220 on the base end side, and groove-shaped portions 260 are formed between adjacent raised portions 230 in the circumferential direction. A circumferential protrusion 250 is provided on the base end 202 side of the raised portion 230. When the core body 100 is attached to the support shaft 200, the projection on the other end 111 side of the core body 100 moves along the groove-shaped portion 260 in the axial direction of the support shaft 200. Interference between the projection on the other end 111 side of the core body 100 and the raised portions 230 of the support shaft 200 is avoided, and the resistance when inserting the support shaft 200 into the core body 100 can be reduced.

[0085] As shown in Figure 9, the raised portion 230 has a pair of inclined portions 247 and 248. The pair of inclined portions 247 and 248 are inclined with respect to the axial direction of the support shaft 200 such that they approach the groove-shaped portion 260 as they move from the tip surface 201 of the support shaft 200 towards the base end 202. When the core body 100 is mounted on the support shaft 200, the projection on the other end 111 side of the core body 100 comes into contact with the inclined portions 247 and 248, and is guided by the inclined portions 247 and 248 to lead the projection of the core body 100 into the groove-shaped portion 260. This eliminates the need for a separate configuration to align the core body 100 and the support shaft 200 in the circumferential direction, making it easy to mount the core body 100 onto the support shaft 200. The projection on the other end 111 of the core body 100 can be moved along the groove-shaped portion 260 in the axial direction of the support shaft 200, thereby reducing the resistance when inserting the support shaft 200 into the core body 100.

[0086] When the core body 100 is mounted on the support shaft 200, the projection on the other end 111 of the core body 100 comes into contact with the inclined portion 247, and the projection is guided by the inclined portion 247 to the groove-shaped portion 260 on one side in the circumferential direction relative to the raised portion 230. When the projection on the other end 111 of the core body 100 comes into contact with the inclined portion 248, the projection is guided by the inclined portion 248 to the groove-shaped portion 260 on the other side in the circumferential direction relative to the raised portion 230. This allows the core body 100 to be mounted smoothly on the support shaft 200.

[0087] As shown in Figures 9 and 10, the support shaft 200 has a protruding member 211 that protrudes from the outer circumferential surface 210 on the tip side. The protrusion height of the protruding member 211 relative to the outer circumferential surface 210 is adjustable. While the core body 100 is attached to the support shaft 200, the protruding member 211 slides against the inner circumferential surface 120 of the core body 100. At this time, the protruding member 211 is pressed by the inner circumferential surface 120, and the protrusion height from the outer circumferential surface 210 on the tip side is reduced. In this way, the resistance when inserting the support shaft 200 into the core body 100 can be reduced.

[0088] As shown in Figures 3 and 5, a circumferential recess 103 is formed on one end 101 of the core body 100, where a portion of the inner circumferential surface 120 is recessed. As shown in Figure 12, when the core body 100 is attached to the support shaft 200 and the core body 100 is mounted on the support shaft 200, the protruding member 211 of the support shaft 200 is housed within the circumferential recess 103. The protruding member 211 is not pressed by the core body 100, and its protrusion height from the outer circumferential surface 210 on the tip side has returned to its original height. The protruding member 211 extends radially outward beyond the inner circumferential surface 120 of the core body 100. The protruding member 211 can maintain the mounted state of the core body 100 on the support shaft 200.

[0089] As shown in Figures 9 and 10, the protruding member 211 is positioned closer to the tip surface 201 than to the raised portion 230. When inserting the core body 100 into the support shaft 200 until the protruding member 211 is accommodated in the circumferential recess 103, interference between the projection on one end 101 of the core body 100 and the raised portion 230 that protrudes from the base end outer peripheral surface 220 of the support shaft 200 is avoided. This reduces the resistance when inserting the support shaft 200 into the core body 100.

[0090] As shown in Figures 9 and 10, the protruding member 211 is positioned to overlap with the raised portion 230 in the circumferential direction of the support shaft 200. The protruding member 211 is positioned to be offset in the circumferential direction from the groove-shaped portion 260 of the support shaft 200. When the core body 100 is mounted on the support shaft 200, the projection on the other end 111 of the core body 100 moves along the groove-shaped portion 260 in the axial direction of the support shaft 200. Interference between the projection on the other end 111 of the core body 100 and the protruding member 211 is avoided, and the resistance when inserting the support shaft 200 into the core body 100 can be reduced.

[0091] As shown in Figures 9 and 10, the protruding member 211 is positioned in the circumferential direction of the support shaft 200 so as to overlap with the tip 246. When the core body 100 is attached to the support shaft 200, if any projection on the other end 111 of the core body 100 comes into contact with the protruding member 211, that projection is guided along the protruding member 211 in the circumferential direction of the support shaft 200, causing the projection to move relative to a position offset from the tip 246 in the circumferential direction. If the attachment of the core body 100 to the support shaft 200 continues in this state, the projection on the other end 111 of the core body 100 will come into contact with either the inclined portion 247 or 248 of the guide portion 245. The projection is guided into the groove-shaped portion 260 by the inclined portion 247 or 248. This allows the core body 100 to be attached to the support shaft 200 smoothly.

[0092] As shown in Figures 9 and 10, the protruding member 211 is positioned in the circumferential direction of the support shaft 200 so as to overlap with the first extending portion 231. Referring also to Figures 6 and 7, with the projection on the other end 111 side of the core body 100 guided into the groove-shaped portion 260 by the protruding member 211 and the inclined portions 247 and 248, the first ridge portion 130 and the third ridge portion 150 are positioned to be housed in the shallow groove portions 241 and 242. The first extending portion 231, the second extending portion 233 and the third extending portion 235, which have a large protrusion height from the outer circumferential surface of the support shaft 200, and the protruding member 211 are positioned on the inner circumferential surface 120 of the core body 100 where no ridge portions are formed. When the core body 100 is attached to the support shaft 200, interference between the protrusion from the outer surface of the support shaft 200 and the protruding portion from the inner surface 120 of the core body 100 is avoided. Therefore, the resistance when inserting the support shaft 200 into the core body 100 can be reduced.

[0093] With the core body 100 mounted on the support shaft 200, the second and fourth ridge sections 140 and 160 of the core body 100 are housed in the groove-shaped section 260, and the first and third ridge sections 130 and 150 are housed in the shallow groove sections 241 and 242. The engagement between the grooves and ridges facilitates the transmission of torque from the rotating support shaft 200 to the core body 100. When unwinding the packaging material 21 from or winding it onto the packaging material roll 2, the packaging material roll 2 can be reliably rotated by rotating the support shaft 200.

[0094] <Support shaft 300> The details of the configuration of the support shaft 300 will be described below. Figure 14 is a front view showing the packaging roll 3 attached to the support shaft 300. The packaging roll 3 is mounted on the support shaft 300 by inserting the support shaft 300 into the core body 100. Figure 15 is a perspective view of the support shaft 300. Figure 16 is a front view of the support shaft 300. Figure 16 shows the support shaft 300 as viewed in the direction of arrow XVI shown in Figure 15.

[0095] The support shaft 300 has a tip surface 301. The tip surface 301 has a planar shape. When viewed in the axial direction of the support shaft 300, the tip surface 301 has a circular shape. The support shaft 300 has a base end 302. The outer circumferential surface of the base end 302 has a cylindrical shape. The opposing surface 303 is a part of the surface of the support shaft 300 that faces the end face of the core body 100, specifically one end 101, when the core body 100 is mounted on the support shaft 300. The tapered surface 304 is a part of the surface of the support shaft 300 that faces the tapered surface of the core body 100, specifically the tapered surface 102 on the side of one end 101, when the core body 100 is mounted on the support shaft 300.

[0096] The tapered surface 304 has the shape of the side surface of a frustocone. The tapered surface 304 is inclined with respect to the axial direction of the support shaft 300 and with respect to the radial direction of the support shaft 300. The tapered surface 304 is inclined to approach the central axis of the support shaft 300 as it approaches the tip surface 301 from the base end 302 of the support shaft 300.

[0097] The support shaft 300 has a tip-side outer circumferential surface 310. The tip-side outer circumferential surface 310 has a roughly cylindrical shape. The tip-side outer circumferential surface 310 is a part of the surface of the support shaft 300 that extends axially from the edge of the tip surface 301 toward the base end 302.

[0098] The support shaft 300 has a protruding member 311. The protruding member 311 has, for example, a spherical outer shape. The protruding member 311 protrudes radially outward from the tip-side outer circumferential surface 310. The protruding member 311 is configured so that its protrusion height relative to the tip-side outer circumferential surface 310 can be changed. The protruding member 311 is supported by a biasing member such as a spring. The biasing member is positioned radially inward from the tip-side outer circumferential surface 310, at a position not shown in Figures 15 and 16. The biasing member extends radially from the support shaft 300 and biases the protruding member 311 radially outward from the support shaft 300.

[0099] The protruding end of the protruding member 311, which protrudes from the outer peripheral surface 310 on the tip side, is pressed toward the outer peripheral surface 310 on the tip side, thereby reducing the protruding height of the protruding member 311 relative to the outer peripheral surface 310 on the tip side. At this time, the biasing member is contracted, and the dimensions of the biasing member in the radial direction of the support shaft 300 are reduced.

[0100] The support shaft 300 has a base end outer circumferential surface 320. The base end outer circumferential surface 320 has a roughly cylindrical shape. The base end outer circumferential surface 320 is connected to a tapered surface 304. In the portion where the tapered surface 304 is provided, the outer diameter of the support shaft 300 increases from the base end outer circumferential surface 320 toward the base end portion 302.

[0101] The base end outer circumferential surface 320 is positioned closer to the base end 302 than the tip end outer circumferential surface 310 in the axial direction of the support shaft 300. The outer diameter of the tip end outer circumferential surface 310 and the outer diameter of the base end outer circumferential surface 320 may be different. The outer diameter of the base end outer circumferential surface 320 may be larger than the outer diameter of the tip end outer circumferential surface 310. The member having the tip end surface 301 and the tip end outer circumferential surface 310 and the member having the base end outer circumferential surface 320 may be different members.

[0102] The support shaft 300 has multiple, specifically six, raised portions 330 that protrude radially outward from the base end outer circumferential surface 320. The six raised portions 330, which have the same shape, are arranged at equal intervals in the circumferential direction of the support shaft 300. The protruding member 311 protrudes from the tip end outer circumferential surface 310, and the raised portions 330 are provided on the base end outer circumferential surface 320, so the protruding member 311 is positioned closer to the tip surface 301 than the raised portions 330.

[0103] Groove-shaped portions 360 are formed between adjacent raised portions 330 in the circumferential direction of the support shaft 300. The raised portions 330 are raised from the base end outer circumferential surface 320, and the base end outer circumferential surface 320 is not raised in the groove-shaped portions 360, so the groove-shaped portions 360 have a shape that is recessed radially inward relative to the raised portions 330. The groove-shaped portions 360 have a groove-like shape that extends in the axial direction of the support shaft 300. Since the base end outer circumferential surface 320 has six raised portions 330, the number of groove-shaped portions 360 formed between the raised portions 330 is also the same as the number of raised portions 330, which is six. As shown in Figure 16, the groove-shaped portions 360 are arranged at equal intervals in the circumferential direction of the support shaft 300.

[0104] The raised portion 330 has a plurality of extending portions. Specifically, the raised portion 330 has a first extending portion 333 and a second extending portion 335. The first extending portion 333 is provided along one edge of the raised portion 330 in the circumferential direction of the support shaft 300 and extends in the axial direction of the support shaft 300. The second extending portion 335 is provided along the other edge of the raised portion 330 in the circumferential direction of the support shaft 300 and extends in the axial direction of the support shaft 300.

[0105] The raised portion 330 has a shallow groove portion 341 formed between the first extended portion 333 and the second extended portion 335, which are adjacent to each other in the circumferential direction of the support shaft 300.

[0106] The first extension 333 has an inclined end 334. The inclined end 334 is the end of the first extension 333 closest to the tip surface 301 in the axial direction of the support shaft 300, and is on the tip surface 301 side. The second extension 335 has an inclined end 336. The inclined end 336 is the end of the second extension 335 closest to the tip surface 301 in the axial direction of the support shaft 300, and is on the tip surface 301 side.

[0107] The inclined ends 334 and 336 are inclined with respect to the axial direction of the support shaft 300 and with respect to the circumferential direction of the support shaft 300. The inclined ends 334 and 336 are inclined with respect to the axial direction of the support shaft 200 such that they approach the shallow groove portion 341 as they approach the base end portion 302.

[0108] The raised portion 330 further has a guide portion 345. The guide portion 345 has a protruding end 346 and a pair of inclined portions 347 and 348. The protruding end 346 is the end of the raised portion 330 closest to the tip surface 301 in the axial direction of the support shaft 300, and is on the tip surface 301 side. The inclined portions 347 and 348 are inclined with respect to the axial direction of the support shaft 300 and are inclined with respect to the circumferential direction of the support shaft 300. The inclined portions 347 and 348 are inclined with respect to the axial direction of the support shaft 300 such that they approach the groove-shaped portion 360 as they move from the tip to the base end of the support shaft 300.

[0109] The raised portion 330 of the support shaft 300 has an asymmetric shape with respect to a hypothetical straight line that passes through the tip end 346 of the guide portion 345 and extends in the axial direction of the support shaft 300. The pair of inclined portions 347 and 348 of the raised portion 330 have an asymmetric shape. The tip end 346 is located offset from the central portion of the raised portion 330 in the circumferential direction of the support shaft 300. The tip end 346 is positioned to overlap with the first extending portion 333 in the circumferential direction of the support shaft 300.

[0110] The protruding member 311 is positioned in the circumferential direction of the support shaft 300 at a location that overlaps with the raised portion 330. The protruding member 311 is positioned in the circumferential direction of the support shaft 300 at a location offset from the center line of the raised portion 230. The protruding member 311 is positioned in the circumferential direction of the support shaft 300 at a location that overlaps with the tip portion 346 of the raised portion 330. The protruding member 311 is positioned in the circumferential direction of the support shaft 300 at a location that overlaps with the first extending portion 333 of the raised portion 330. As shown in Figure 16, when the support shaft 300 is viewed axially from the side of the tip surface 301, the first extending portion 333 is hidden by the protruding member 311 and is not visible, while the shallow groove portion 341 is not hidden by the protruding member 311 and is exposed and visible.

[0111] The raised portion 330 further has a circumferential projection 350 at the position closest to the base end portion 302 in the axial direction of the support shaft 300. The circumferential projection 350 extends in the circumferential direction of the support shaft 300 over the entire length of one raised portion 330. The circumferential projection 350 is the portion of the raised portion 330 that has the greatest height protruding from the base end side outer peripheral surface 320. The circumferential projection 350 protrudes higher from the base end side outer peripheral surface 320 compared to the first extension portion 333 and the second extension portion 335.

[0112] Of the six groove-shaped sections 360, two groove-shaped sections 360 that are spaced two apart in the circumferential direction have a widened section 362 at the end on the base end 302 side, which widens the circumferential width of the support shaft 300. In the circumferential direction of the support shaft 300, the groove-shaped sections 360 are arranged in the order of groove-shaped sections 360 with the widened section 362, groove-shaped sections 360 without the widened section, and groove-shaped sections 360 without the widened section.

[0113] The pressed portion 371 is positioned at the same location as the wide portion 362 in the circumferential direction of the support shaft 300. In the state shown in Figures 15 and 16, where the core body 100 is not mounted on the support shaft 300, the pressed portion 371 is located inside the wide portion 362. The pressed portion 371 and the movable portion 372 are made of a single component and are configured to reciprocate integrally in the axial direction of the support shaft 300. The pressed portion 371 and the movable portion 372 are biased toward the tip surface 301 along the axial direction of the support shaft 300. Because the wide portion 362 has a wide shape, the pressed portion 371 abuts against the raised portion 330, thereby positioning the pressed portion 371 in the axial direction.

[0114] <Attaching the core body 100 to the support shaft 300> Figure 17 is a perspective view showing the core body 100 mounted on the support shaft 300. Figure 18 is a front view showing the core body 100 mounted on the support shaft 300. Figure 19 is a side view showing the core body 100 mounted on the support shaft 300. Figure 18 shows the core body 100 and support shaft 300 as seen in the direction of arrow XVIII shown in Figures 17 and 19. Figure 19 shows the core body 100 and support shaft 300 as seen in the direction of arrow XIX shown in Figure 18. In Figures 17 to 19, the packaging material 31 is omitted from the illustration.

[0115] The core body 100 is attached to the support shaft 300 from the side of one end 101, which is one end 101 and the other end 111. As shown in Figure 19, the opposing surface 303 of the support shaft 300 faces the one end 101 of the core body 100 with a gap between them. The tapered surface 102 on the side of the one end 101 of the core body 100 and the tapered surface 304 of the support shaft 300 are in surface contact with at least a portion of them.

[0116] As shown in Figures 15 and 16, the support shaft 300 has six groove-shaped portions 360. As shown in Figures 3 and 5, the core body 100 has six projections on one end 101. As shown in Figures 6 and 7, the core body 100 has four projections on the other end 111. The number of projections on one end 101 of the core body 100 is different from the number of projections on the other end 111. The support shaft 300 has the same number of groove-shaped portions 360 as the number of projections on one end 101 of the core body 100.

[0117] Even if one attempts to attach the core body 100 to the support shaft 300 from the other end 111, the number of groove-shaped portions 360 and the number of protrusions on the other end 111 are different, making it impossible to move the protrusions on the other end 111 into the groove-shaped portion 360. Therefore, it is impossible to attach the core body 100 to the support shaft 300 from the other end 111. On the other hand, since the number of groove-shaped portions 360 and the number of protrusions on the one end 101 are equal, all of the protrusions on the one end 101 can be moved into the groove-shaped portion 360, making it possible to attach the core body 100 to the support shaft 300 from the one end 101.

[0118] The number of protrusions on one end 101 of the core body 100 is made different from the number of protrusions on the other end 111, while the number of groove-shaped portions 360 on the support shaft 300 is made the same as the number of protrusions on the one end 101 of the core body 100. This realizes a configuration in which the core body 100 can only be attached to the support shaft 300 from the end 101. By making it physically impossible to attach the core body 100 to the support shaft 300 from the other end 111, it is possible to prevent the winding body from being incorrectly attached to the support shaft 300.

[0119] When the number of protrusions on one end 101 of the core body 100 is different from the number of protrusions on the other end 111, the number of protrusions on the other end 111 is not a divisor of the number of groove-shaped portions 360 of the support shaft 300 (i.e., the number of protrusions on the one end 101). If the number of protrusions on the other end 111 is a divisor (for example, 3) of the number of protrusions on the one end 101 (6 in this embodiment), then all of the protrusions on the other end 111 can be moved into the six groove-shaped portions 360 of the support shaft 300. By making the number of protrusions on the other end 111 a number that is not a divisor of the number of protrusions on the one end 101, it is possible to make it impossible to reliably attach the core body 100 to the support shaft 300 from the other end 111.

[0120] When attaching the core body 100 to the support shaft 300 from the end 101 side, the core body 100 and the support shaft 300 rotate relative to each other in order to align the projection and groove-shaped portion 360 on the end 101 side in the circumferential direction. Typically, the support shaft 300 rotates relative to the core body 100, which moves in the axial direction. If the number of projections and groove-shaped portions 360 on the end 101 side is small, this rotation angle becomes large. If the number of projections and groove-shaped portions 360 on the end 101 side is set to 6, the rotation angle of the support shaft 300 relative to the core body 100 when attaching the core body 100 to the support shaft 300 from the end 101 side can be limited to a maximum of about 30°. This makes it easier to attach the core body 100 to the support shaft 300.

[0121] As shown in Figures 9 and 10, the support shaft 200 has four groove-shaped sections 260. As shown in Figures 15 and 16, the support shaft 300 has six groove-shaped sections 360. The number of groove-shaped sections 260 on the support shaft 200 is different from the number of groove-shaped sections 360 on the support shaft 300.

[0122] Even if one attempts to attach the core body 100 to the support shaft 200 from one end 101, the number of groove-shaped portions 260 and the number of protrusions on the one end 101 are different, making it impossible to move the protrusions on the one end 101 into the groove-shaped portion 260. Therefore, it is impossible to attach the core body 100 to the support shaft 200 from the one end 101. On the other hand, since the number of groove-shaped portions 260 and the number of protrusions on the other end 111 are equal, all of the protrusions on the other end 111 can be moved into the groove-shaped portion 260, making it possible to attach the core body 100 to the support shaft 200 from the other end 111.

[0123] The number of groove-shaped portions 260 on the support shaft 200 and the number of groove-shaped portions 360 on the support shaft 300 are made different. The number of groove-shaped portions 260 on the support shaft 200 is made the same as the number of protrusions on the other end 111 side of the core body 100. The number of groove-shaped portions 360 on the support shaft 300 is made the same as the number of protrusions on the one end 101 side of the core body 100. This realizes a configuration in which the core body 100 can be attached to the support shaft 200 only from the other end 111 side, and the core body 100 can be attached to the support shaft 300 only from the one end 101 side. By making it physically impossible to attach the core body 100 to the support shaft 200 from the one end 101 side and to attach the core body 100 to the support shaft 300 from the other end 111 side, it is possible to prevent the winding body from being incorrectly attached to the support shafts 200 and 300.

[0124] When the number of groove-shaped portions 260 on the support shaft 200 and the number of groove-shaped portions 360 on the support shaft 300 are different, the number of groove-shaped portions 360 on the support shaft 300 is not a multiple of the number of protrusions on the other end 111 side of the core body 100 (i.e., the number of groove-shaped portions 260 on the support shaft 200). If the number of groove-shaped portions 360 on the support shaft 300 is a multiple of the number of groove-shaped portions 260 on the support shaft 200 (4 in this embodiment) (for example, 8), then all of the protrusions on the other end 111 side can be moved into the groove-shaped portions 360 on the support shaft 300. By making the number of groove-shaped portions 360 a number that is not a multiple of the number of groove-shaped portions 260, it is possible to make it impossible to reliably attach the core body 100 to the support shaft 300 from the other end 111 side.

[0125] As shown in Figure 4, the projection 133 on one end 101 of the core body 100 and the projection 143 on the other end 111 are positioned at different locations in the circumferential direction of the core body 100. The projection on one end 101 of the core body 100 and the groove-shaped portion 360 of the support shaft 300 are aligned in the circumferential direction, allowing all of the projection on one end 101 to be moved into the groove-shaped portion 360. On the other hand, the projection on the other end 111 of the core body 100 and the groove-shaped portion 360 of the support shaft 300 cannot be aligned in the circumferential direction, so the projection on the other end 111 cannot be moved into the groove-shaped portion 360. This ensures that a configuration can be reliably achieved in which the core body 100 can only be attached to the support shaft 300 from the one end 101 side.

[0126] As shown in Figure 16, the groove-shaped portions 360 of the support shaft 300 are arranged at equal intervals in the circumferential direction of the support shaft 300. By arranging the groove-shaped portions 360 at equal intervals and by having different numbers of protrusions on one end 101 of the core body 100 and on the other end 111, it is possible to reliably realize a configuration in which only the protrusions on the one end 101 can be aligned with the groove-shaped portions 360.

[0127] As shown in Figure 4, the core body 100 has a tapered surface 102 on one end 101 that approaches the central axis of the core body 100 as it moves from the one end 101 towards the other end 111. Since the inner diameter of the core body 100 is increased at one end 101, interference between the core body 100 and the support shaft 300 is suppressed, and the operation of inserting the support shaft 300 into the core body 100 is made easier.

[0128] As shown in Figure 15, the support shaft 300 has a tapered surface 304 that slopes radially outward from the tip surface 301 towards the base end surface 302. When the core body 100 is mounted on the support shaft 300, the tapered surface 102 of the core body 100 and the tapered surface 304 of the support shaft 300 come into contact, making it easy to align the central axes of the core body 100 and the support shaft 300.

[0129] As shown in Figures 3 and 4, the projection on one end 101 of the core body 100 is positioned further away from the end 101 than the tapered surface 102. The arrangement of the projection on the end 101 and the tapered surface 102 is determined so that when the core body 100 is mounted onto the support shaft 300 from the end 101 side, the tapered surface 102 engages with the support shaft 300 before the projection on the end 101 side. This prevents the projection on the end 101 side of the core body 100 from contacting the tip surface 301 of the support shaft 300, which would hinder the mounting of the core body 100 onto the support shaft 300, and makes it easier to insert the support shaft 300 into the core body 100.

[0130] As shown in Figures 3 and 5, a circumferential recess 103 is formed in which a part of the inner circumferential surface 120 is recessed, closer to one end 101 than the projection on one end 101 of the core body 100. As shown in Figure 15, the support shaft 300 has a circumferential protrusion 350 that rises from the base end outer circumferential surface 320. When the core body 100 is mounted on the support shaft 300, the circumferential recess 103 of the core body 100 accommodates the circumferential protrusion 350 of the support shaft 300. This prevents the circumferential protrusion 350 that rises from the base end outer circumferential surface 320 of the support shaft 300 from hindering the mounting of the core body 100 onto the support shaft 300, and allows the support shaft 300 to be easily inserted into the core body 100.

[0131] As shown in Figures 3 and 5, the core body 100 has protrusions 104 between adjacent circumferential recesses 103 in the circumferential direction. As shown in Figures 15 and 16, groove-shaped portions 360 are formed between adjacent circumferential protrusions 350 in the circumferential direction of the support shaft 300. The groove-shaped portions 360 extend in the axial direction of the support shaft 300. When the core body 100 is mounted on the support shaft 300, the protrusions 104 can be moved axially along the groove-shaped portions 360, thereby ensuring that the circumferential protrusions 350 of the support shaft 200 are securely housed inside the circumferential recesses 103 of the core body 100 when mounted.

[0132] As shown in Figures 3 and 5, the projection on one end 101 of the core body 100 and the circumferential recess 103 are positioned at different locations in the circumferential direction of the core body 100. The support shaft 300 has multiple raised portions 330 that protrude from the outer peripheral surface 320 on the base end side, and groove-shaped portions 360 are formed between adjacent raised portions 330 in the circumferential direction. A circumferential protrusion 350 is provided on the base end 302 side of the raised portion 330. When the core body 100 is mounted on the support shaft 300, the projection on one end 101 of the core body 100 moves along the groove-shaped portion 360 in the axial direction of the support shaft 300. Interference between the projection on one end 101 of the core body 100 and the raised portions 330 of the support shaft 300 is avoided, and the resistance when inserting the support shaft 300 into the core body 100 can be reduced.

[0133] As shown in Figure 15, the raised portion 330 has a pair of inclined portions 347 and 348. The pair of inclined portions 347 and 348 are inclined with respect to the axial direction of the support shaft 300 such that they approach the groove-shaped portion 360 as they move from the tip surface 301 of the support shaft 300 towards the base end 302. When the core body 100 is mounted on the support shaft 300, the projection on one end 101 of the core body 100 comes into contact with the inclined portions 347 and 348, and is guided by the inclined portions 347 and 348 to lead the projection of the core body 100 into the groove-shaped portion 360. This eliminates the need for a separate configuration to align the core body 100 and the support shaft 300 in the circumferential direction, making it easy to mount the core body 100 onto the support shaft 300. The projection on one end 101 of the core body 100 can be moved along the groove-shaped portion 360 in the axial direction of the support shaft 300, thereby reducing the resistance when inserting the support shaft 300 into the core body 100.

[0134] When the core body 100 is mounted on the support shaft 300, the projection on one end 101 of the core body 100 comes into contact with the inclined portion 347, and the projection is guided by the inclined portion 347 to the groove-shaped portion 360 on one side in the circumferential direction relative to the raised portion 330. When the projection on one end 101 of the core body 100 comes into contact with the inclined portion 348, the projection is guided by the inclined portion 348 to the groove-shaped portion 360 on the other side in the circumferential direction relative to the raised portion 330. This allows the core body 100 to be mounted smoothly on the support shaft 300.

[0135] As shown in Figures 15 and 16, the support shaft 300 has a protruding member 311 that protrudes from the outer circumferential surface 310 on the tip side. The protruding height of the protruding member 311 relative to the outer circumferential surface 310 is adjustable. While the core body 100 is attached to the support shaft 300, the protruding member 311 slides against the inner circumferential surface 120 of the core body 100. At this time, the protruding member 311 is pressed by the inner circumferential surface 120, and the protruding height from the outer circumferential surface 310 on the tip side is reduced. In this way, the resistance when inserting the support shaft 300 into the core body 100 can be reduced.

[0136] As shown in Figures 6 and 7, a circumferential recess 113 is formed on the other end 111 side of the core body 100, where a portion of the inner circumferential surface 120 is recessed. As shown in Figure 18, when the core body 100 is attached to the support shaft 300 and the core body 100 is mounted on the support shaft 300, the protruding member 311 of the support shaft 300 is housed within the circumferential recess 113. The protruding member 311 is not pressed by the core body 100, and its protrusion height from the tip-side outer circumferential surface 310 has returned to its original height. The protruding member 311 extends radially outward beyond the inner circumferential surface 120 of the core body 100. The protruding member 311 can maintain the mounted state of the core body 100 on the support shaft 300.

[0137] As shown in Figures 15 and 16, the protruding member 311 is positioned closer to the tip surface 301 than to the raised portion 330. When inserting the core body 100 into the support shaft 300 until the protruding member 311 is housed in the circumferential recess 113, interference between the projection on the other end 111 side of the core body 100 and the raised portion 330 that protrudes from the base end outer peripheral surface 320 of the support shaft 300 is avoided. This reduces the resistance when inserting the support shaft 300 into the core body 100.

[0138] As shown in Figures 15 and 16, the protruding member 311 is positioned to overlap with the raised portion 330 in the circumferential direction of the support shaft 300. The protruding member 311 is positioned to be offset in the circumferential direction from the groove-shaped portion 360 of the support shaft 300. When the core body 100 is mounted on the support shaft 300, the projection on one end 101 of the core body 100 moves along the groove-shaped portion 360 in the axial direction of the support shaft 300. Interference between the projection on one end 101 of the core body 100 and the protruding member 311 is avoided, and the resistance when inserting the support shaft 300 into the core body 100 can be reduced.

[0139] As shown in Figures 15 and 16, the protruding member 311 is positioned in the circumferential direction of the support shaft 300 so as to overlap with the tip 346. When the core body 100 is mounted on the support shaft 300, if any projection on one end 101 of the core body 100 comes into contact with the protruding member 311, that projection is guided along the protruding member 311 in the circumferential direction of the support shaft 300, causing the projection to move relative to a position offset from the tip 346 in the circumferential direction. If mounting the core body 100 to the support shaft 300 continues in this state, the projection on one end 101 of the core body 100 will come into contact with either the inclined portion 347 or 348 of the guide portion 345. The projection is guided into the groove-shaped portion 360 by the inclined portions 347 and 348. This allows the core body 100 to be mounted smoothly on the support shaft 300.

[0140] As shown in Figures 15 and 16, the protruding member 311 is positioned to overlap with the first extending portion 333 in the circumferential direction of the support shaft 300. Referring also to Figures 3 and 5, with the projection on one end 101 of the core body 100 guided into the groove-shaped portion 360 by the protruding member 311 and the inclined portions 347 and 348, the second ridge portion 140 and the third ridge portion 150 are positioned to be housed in the shallow groove portion 341. The first extending portion 333 and the second extending portion 335, which have a large protrusion height from the outer circumferential surface of the support shaft 300, and the protruding member 311 are positioned in a location where no ridges are formed on the inner circumferential surface 120 of the core body 100. When the core body 100 is mounted on the support shaft 300, interference between the bulge from the outer circumferential surface of the support shaft 300 and the protruding portion from the inner circumferential surface 120 of the core body 100 is avoided. Therefore, the resistance when inserting the support shaft 300 into the core body 100 can be reduced.

[0141] As shown in Figures 15 and 16, the protruding member 311 is positioned offset from the centerline of the raised portion 330 in the circumferential direction of the support shaft 300. Unlike the support shaft 200 shown in Figure 9, the raised portion 330 of the support shaft 300 has an even number of extensions 333, 335 and has a shallow groove 341 at the center of the raised portion 330 in the circumferential direction. The second ridge 140 and the third ridge 150 are guided by the shallow groove 341. The second ridge 140 and the third ridge 150 protrude from the inner circumferential surface 120 of the core body 100.

[0142] If the protruding member 311 is positioned so that it coincides with the center line of the raised portion 330 in the circumferential direction of the support shaft 300, the protruding member 311 will slide against the second ridge portion 140 or the third ridge portion 150 when the core body 100 is attached to the support shaft 300, resulting in increased resistance. By positioning the protruding member 311 at a position offset from the center line of the raised portion 330, the protruding member 311 can slide against the inner circumferential surface 120 where the ridge portion does not protrude. Therefore, the resistance when inserting the support shaft 300 into the core body 100 can be reduced.

[0143] With the core body 100 mounted on the support shaft 300, the first ridge portion 130 and the fourth ridge portion 160 of the core body 100 are housed in the groove-shaped portion 360, and the second ridge portion 140 and the third ridge portion 150 are housed in the shallow groove portion 341. The engagement between the grooves and ridges facilitates the transmission of torque from the rotating support shaft 300 to the core body 100. When unwinding the packaging material 31 from or winding it onto the packaging material roll 3, the packaging material roll 3 can be reliably rotated by rotating the support shaft 300.

[0144] In a support shaft 300 where the raised portion 330 has an even number of extending portions 333, 335, the protruding member 311 is positioned offset from the centerline of the raised portion 330 in the circumferential direction in order to position the protruding member 311 at a position that overlaps with the first extending portion 333 in the circumferential direction of the support shaft 300. Also, in the support shaft 300, as shown in Figures 15 and 16, the pair of inclined portions 347, 348 have an asymmetrical shape. The pair of inclined portions 347, 348 intersect at the tip 346. Because the pair of inclined portions 347, 348 have an asymmetrical shape, the tip 346 is positioned offset from the centerline of the raised portion 330 in the circumferential direction. By positioning both the protruding member 311 and the tip 346 at positions offset from the centerline of the raised portion 330 in the circumferential direction, the tip 346 can be positioned at a position that overlaps with the protruding member 311 in the circumferential direction.

[0145] <Attachment detection unit> Figure 20 is a schematic diagram showing the arrangement of the light-shielding plate 273 when the core body 100 is not mounted on the support shaft 200. The support shaft 200 is equipped with a mounting detection unit that detects whether or not the core body 100 is mounted on the support shaft 200. The pressed part 271 and movable part 272 shown in Figures 9 and 11, and the light-shielding plate 273 and photosensor 274 shown in Figures 20 and 21 constitute the device detection unit of the support shaft 200. Similarly, the support shaft 300 is equipped with a mounting detection unit that detects whether or not the core body 100 is mounted on the support shaft 300. The pressed part 371 and movable part 372 shown in Figures 15 and 17, and the light-shielding plate and photosensor (not shown) constitute the mounting detection unit of the support shaft 300. The mounting detection unit of the support shaft 200 will be described below as an example.

[0146] The light-shielding plate 273 is attached to the movable part 272 and is movable in the axial direction of the support shaft 200 together with the pressed part 271 and the movable part 272. In Figure 9, when the core body 100 is not mounted on the support shaft 200, the pressed part 271 is located inside the wide part 262. In Figure 11, when the core body 100 is mounted on the support shaft 200, the pressed part 271 moves in the axial direction of the support shaft 200 within the groove-shaped part 260 by being pressed by the core body 100. Figure 21 is a schematic diagram showing the arrangement of the light-shielding plate 273 when the core body 100 is mounted on the support shaft 200. The photosensor 274 has a light-emitting part and a light-receiving part.

[0147] When the core 100 is not mounted on the support shaft 200, the light-shielding plate 273 is positioned away from the photosensor 274, as shown in Figure 20. The light generated by the light-emitting part of the photosensor 274 is not blocked by the light-shielding plate 273. The mounting detection unit can detect when the light-receiving part is receiving light generated by the light-emitting part and the core 100 is not mounted on the support shaft 200.

[0148] When the core 100 is mounted on the support shaft 200, the light-shielding plate 273 approaches the photosensor 274, as shown in Figure 21. The light emitted by the light-emitting part of the photosensor 274 is blocked by the light-shielding plate 273. The mounting detection unit can detect that the core 100 is mounted on the support shaft 200 when the amount of light received by the light-receiving part decreases.

[0149] The core body 100 presses against the pressed portion 271, causing the light-shielding plate 273 to move integrally with the pressed portion 271, thereby enabling detection of whether or not the core body 100 is mounted on the support shaft 200. A mounting detection unit can be realized with a simple and low-cost configuration.

[0150] <How to reuse the core 100> Next, a method for manufacturing a wound body using a recycled core 100 will be described. Figure 22 is a flowchart of a first example of a method for manufacturing a wound body. Figure 23 is a schematic diagram showing a first example of a method for manufacturing a wound body.

[0151] In the first example of the method for manufacturing a wound body, the wound body is manufactured by reusing the core body 100 after the previously wound packaging materials 21 and 31 have been used up, and rewinding new packaging materials 21 and 31 onto the core body 100. As shown in Figure 22, first, the core body 100 is prepared (step S1001). As shown in Figure 23, a core body 100 is prepared which has multiple protrusions protruding from the inner circumferential surface 120 on one end 101 and on the other end 111, respectively, with the number of protrusions on one end 101 being different from the number of protrusions on the other end 111, as explained with reference to Figures 3 to 7.

[0152] Next, the packaging materials 21 and 31 are wound around the core 100 (step S1002). As shown in Figure 23, the packaging materials 21 and 31 are wound around the core 100 to create the packaging rolls 2 and 3 (winding bodies).

[0153] Finally, the amount of packaging material 21, 31 wound around the core 100 in step S1002 is written to the recording medium 172 as remaining amount information indicating the remaining amount of packaging material 21, 31 in the wound body (step S1003). This overwrites and updates the remaining amount information already recorded in the recording medium 172. If the amount of packaging material 21, 31 wound around the core 100 is predetermined, the order of the processes in step S1002 and step S1003 may be reversed. Then, the process related to the manufacture of the wound body is completed ("Completion" in Figure 22).

[0154] Figure 24 is a flowchart illustrating a second example of a method for manufacturing a wound body. Figure 25 is a schematic diagram showing a second example of a method for manufacturing a wound body.

[0155] In the second example of the method for manufacturing a wound body, the core body 100, which has used up the previously wound packaging materials 21 and 31, is reused, and another cylindrical body on which the packaging materials 21 and 31 are wound is fitted onto the core body 100 to manufacture the wound body. As shown in Figure 24, first, the core body 100 is prepared (step S1101). As shown in Figure 25, the core body 100 is prepared which has multiple protrusions protruding from the inner circumferential surface 120 on one end 101 and on the other end 111, respectively, with the number of protrusions on the one end 101 side being different from the number of protrusions on the other end 111 side, as explained with reference to Figures 3 to 7.

[0156] Meanwhile, a hollow cylindrical body 400 is prepared (step S1102). The cylindrical body 400 has an inner diameter slightly larger than the outer diameter of the core body 100. Next, the packaging material 21 and 31 are wound around the cylindrical body 400 (step S1103) to form the wound products 2X and 3X (step S1104). The preparation of the core body 100 in step S1101 and the preparation of the wound products 2X and 3X in steps S1102 to S1104 may be carried out in parallel, or one process may be performed after the other. The wound products 2X and 3X may be formed in a location different from the location where the manufacturing equipment for the wound products is installed.

[0157] Next, the core body 100 is inserted into the cylindrical body 400 to integrate the windings 2X, 3X and the core body 100 (step S1105). For example, a member for joining the core body 100 and the cylindrical body 400 can be attached to the outer circumference of the core body 100 in advance, and then the core body 100 is inserted into the hollow part of the hollow cylindrical body 400 to integrate the windings 2X, 3X and the core body 100. In this way, the packaging rolls 2, 3 (windings) are manufactured.

[0158] Finally, the amount of packaging material 21, 31 wound around the cylindrical body 400 in step S1103 is written to the recording medium 172 as remaining amount information indicating the remaining amount of packaging material 21, 31 in the wound body (step S1106). This overwrites and updates the remaining amount information already recorded in the recording medium 172. If the amount of packaging material 21, 31 to be wound around the cylindrical body 400 is predetermined, the order of the processes in step S1105 and step S1106 may be reversed. Then, the process related to the manufacture of the wound body is completed ("Completion" in Figure 24).

[0159] In this way, even if one attempts to attach a wound body made by reusing the core body 100 to the support shaft 200 from one end 101 of the core body 100, the number of groove-shaped portions 260 and the number of protrusions on the one end 101 side are different, making it impossible to move the protrusions on the one end 101 side into the groove-shaped portion 260. Therefore, it is impossible to attach the wound body to the support shaft 200 from the one end 101 side. On the other hand, since the number of groove-shaped portions 260 and the number of protrusions on the other end 111 of the core body 100 are equal, all of the protrusions on the other end 111 side can be moved into the groove-shaped portion 260, making it possible to attach the wound body to the support shaft 200 from the other end 111 side of the core body 100.

[0160] Furthermore, even if one attempts to attach the winding body to the support shaft 300 from the other end 111 of the core body 100, the number of groove-shaped portions 360 and the number of protrusions on the other end 111 are different, making it impossible to move the protrusions on the other end 111 into the groove-shaped portion 360. Therefore, it is impossible to attach the winding body to the support shaft 300 from the other end 111. On the other hand, since the number of groove-shaped portions 360 and the number of protrusions on one end 101 of the core body 100 are equal, all of the protrusions on the one end 101 can be moved into the groove-shaped portion 360, making it possible to attach the winding body to the support shaft 300 from the one end 101 of the core body 100.

[0161] A configuration is realized in which the core body 100 can be attached to the support shaft 200 only from the other end 111 side, and the core body 100 can be attached to the support shaft 300 only from the one end 101 side. By making it physically impossible to attach the core body 100 to the support shaft 200 from the one end 101 side, and by making it physically impossible to attach the core body 100 to the support shaft 300 from the other end 111 side, it is possible to prevent the winding body from being incorrectly attached to the support shafts 200 and 300.

[0162] <Note> The above description includes the following features.

[0163] (Note 1) The core body, The core body is equipped with a long wound material, The core has the shape of a hollow tube having a first end and a second end, and has multiple projections protruding from the inner circumferential surface of the hollow tube on the side of the first end and the side of the second end, A wound body in which the number of protrusions on the first end side is different from the number of protrusions on the second end side.

[0164] (Note 2) The winding body as described in Appendix 1, wherein the number of protrusions on the first end and the number of protrusions on the second end are not divisors of the other.

[0165] (Note 3) The winding body according to Appendix 1 or Appendix 2, wherein, in the circumferential direction of the hollow tube, the projection on the first end and the projection on the second end are positioned at different locations.

[0166] (Note 4) The core body has ridges that protrude from the inner circumferential surface and extend in the axial direction of the hollow tube body, The winding body according to Appendix 1 or Appendix 2, wherein one end of the ridge portion constitutes one of the multiple protrusions on the first end side, and the other end of the ridge portion constitutes one of the multiple protrusions on the second end side.

[0167] (Note 5) The winding body according to any one of the appendices 1 to 4, wherein the core has a tapered surface that approaches the central axis of the hollow tube as it approaches the second end from the first end.

[0168] (Note 6) The winding body according to Appendix 5, wherein the projection on the first end is positioned further from the first end than the tapered surface.

[0169] (Note 7) The winding body according to any one of the appendices 1 to 6, wherein a circumferential recess is formed closer to the first end than the projection on the first end side, and a portion of the inner circumferential surface of the hollow tube is recessed, extending in the circumferential direction of the hollow tube.

[0170] (Note 8) The winding body as described in Appendix 7, wherein the projection on the first end and the circumferential recess are located at different positions in the circumferential direction.

[0171] (Note 9) A recessed portion is formed on a part of the outer surface of the hollow tube, A rewound body according to any one of the appendices 1 to 8, wherein a recording medium is housed inside the aforementioned housing section.

[0172] (Note 10) The process of preparing the core body as described in one of the appendices 1 to 9, A method for manufacturing a wound body, comprising the step of winding a long wound material around the core body.

[0173] (Note 11) The process of preparing the core body as described in one of the appendices 1 to 9, The process involves preparing a winding by winding a long length of material around a hollow cylindrical body, A method for manufacturing a winding body, comprising the step of inserting the core into the cylindrical body to integrate the winding body and the core.

[0174] (Note 12) The first support axis and, It is equipped with a second support shaft, The first support shaft and the second support shaft are fitted with a winding body in which a long wound material is wound around a core body. The first support shaft has a plurality of first groove-shaped portions extending in the axial direction of the first support shaft on its outer surface, The second support shaft has a plurality of second groove-shaped portions extending in the axial direction of the second support shaft on its outer surface, A packaging device in which the number of the first groove-shaped sections and the number of the second groove-shaped sections are different.

[0175] (Note 13) The packaging apparatus as described in Appendix 12, wherein the number of the first groove-shaped portion and the number of the second groove-shaped portion are not multiples of the other.

[0176] (Note 14) The first groove-shaped portions are arranged at equal intervals in the circumferential direction of the first support shaft. The packaging apparatus according to Appendix 12 or Appendix 13, wherein the second groove-shaped portions are arranged at equal intervals in the circumferential direction of the second support shaft.

[0177] (Note 15) The packaging apparatus according to any one of appendices 12 to 14, wherein the first support shaft has a plurality of raised portions that protrude from the outer circumferential surface of the first support shaft, and the first groove-shaped portion is formed between adjacent raised portions in the circumferential direction of the first support shaft.

[0178] (Note 16) The packaging device according to Appendix 15, wherein the raised portion has a pair of inclined portions that are inclined with respect to the axial direction of the first support shaft such that they approach the first groove-shaped portion as they approach the base end from the tip of the first support shaft.

[0179] (Note 17) The packaging apparatus according to Appendix 16, wherein the pair of inclined portions have an asymmetrical shape.

[0180] (Note 18) The packaging apparatus according to any one of appendices 15 to 17, wherein the first support shaft further comprises a protruding member that protrudes radially outward from the outer circumferential surface of the first support shaft, and whose protrusion height relative to the outer circumferential surface is variable.

[0181] (Note 19) The packaging apparatus according to Appendix 18, wherein the protruding member is positioned closer to the tip of the first support shaft than the raised portion.

[0182] (Note 20) The packaging apparatus according to Appendix 18 or Appendix 19, wherein the protruding member is positioned in the circumferential direction of the first support shaft at a location that overlaps with the raised portion.

[0183] (Note 21) The raised portion has a plurality of extending portions that extend in the axial direction of the first support shaft, and shallow groove portions formed between adjacent extending portions in the circumferential direction of the first support shaft. The packaging apparatus according to Appendix 20, wherein the protruding member is positioned in the circumferential direction of the first support shaft at a location that overlaps with the extended portion.

[0184] (Note 22) The packaging apparatus according to Appendix 21, wherein the protruding member is positioned at a location offset from the center line of the raised portion in the circumferential direction of the first support shaft.

[0185] (Note 23) The first support shaft further includes a mounting detection unit that detects whether or not the core body is mounted on the first support shaft. The packaging apparatus according to any one of appendices 12 to 22, wherein the mounting detection unit has a pressed portion that is movable within the first groove-shaped portion in the axial direction of the first support shaft when pressed against the core body.

[0186] While embodiments have been described above, the embodiments disclosed herein should be considered in all respects to be illustrative and not restrictive. The scope of this invention is indicated not by the above description but by the claims, and all modifications within the meaning and scope of the claims are intended to be included. [Explanation of Symbols]

[0187] 1 Packaging device, 2,3 Packaging roll, 2X,3X roll, 5 Packaging section, 19 Sachet, 21,31 Packaging material, 100 Core, 101 One end, 102,112,204,304 Tapered surface, 103,113 Circumferential recess, 104,114 Convex part, 111 Other end, 120 Inner peripheral surface, 130 First ridge, 131,141,151,161 One side ridge end, 132,142,152,162 Other side ridge end, 133,143 Projection, 140 Second ridge, 150 Third ridge, 160 Fourth ridge, 170 Accommodation, 171 Lid, 172 Recording media, 200,300 Support shaft, 201,301 Distal surface, 202,302 Proximal end, 203,303 Opposing surface, 210,310 Distal outer circumferential surface, 211,311 Projecting member, 220,320 Proximal outer circumferential surface, 230,330 Protruding portion, 231,333 First extending portion, 232 Point, 233,335 2nd extension part, 234,236,334,336 Inclined end, 235 3rd extension part, 241,242,341 Shallow groove part, 245,345 Guide part, 246,346 Tip part, 247,248,347,348 Inclined part, 250,350 Circumferential convex part, 260,360 Groove shape, 262,362 Wide section, 271, 371 Pressed section, 272, 372 Movable section, 273 Light-shielding plate, 274 Photosensor, 400 Cylindrical body.

Claims

1. The core body, The core body is equipped with a long wound material, The core has the shape of a hollow tube with a first end and a second end. The core body has a plurality of ridges, The ridge portion protrudes from the inner circumferential surface of the hollow tube, extends in the axial direction of the hollow tube, and has one ridge end which is the first end and the other ridge end which is the second end. Multiple of the aforementioned ridges are arranged at equal intervals in the circumferential direction of the hollow tube, The multiple aforementioned ridges are, Four first furrow sections, Two second ridges are arranged between the two first ridges in the circumferential direction, In the circumferential direction, there are four third ridges adjacent to the first ridge, It includes two fourth ridges positioned between the two third ridges in the circumferential direction, The first ridge portion has a first projection that has the greatest projection height from the inner circumferential surface near the end of one side ridge, The second ridge portion has a second projection that has the greatest protrusion height from the inner circumferential surface near the other side ridge end, the height to which the second projection protrudes from the inner circumferential surface is equal to the height to which the first projection protrudes from the inner circumferential surface, and the height to which the second ridge portion, excluding the second projection and the raised portion around it, protrudes from the inner circumferential surface is equal to the height to which the first ridge portion, excluding the first projection and the raised portion around it, protrudes from the inner circumferential surface. The third ridge portion has an equal projection height from the inner circumferential surface from one side ridge end to the other side ridge end, and the height to which the third ridge portion protrudes from the inner circumferential surface is equal to the height to which the first ridge portion protrudes from the inner circumferential surface, excluding the first projection and the raised portion around it. The fourth ridge portion has an equal projection height from the inner circumferential surface from one side ridge end to the other side ridge end, and the height to which the fourth ridge portion protrudes from the inner circumferential surface is equal to the height to which the first projection protrudes from the inner circumferential surface. The four first protrusions of the four first furrows and the two one-sided furrow ends of the two fourth furrows constitute the protrusions on the first end side. A winding body in which the two second projections of the two second furrows and the two other side furrow ends of the two fourth furrows constitute the projections on the second end side.

2. The winding body according to claim 1, wherein the core has a first tapered surface that approaches the central axis of the hollow tube as it moves from the first end towards the second end, and a second tapered surface that approaches the central axis as it moves from the second end towards the first end.

3. The winding body according to claim 2, wherein the projection on the first end is positioned further from the first end than the first tapered surface, and the projection on the second end is positioned further from the second end than the second tapered surface.

4. A recessed portion is formed on a part of the outer surface of the hollow tube, The winding body according to claim 1, wherein a recording medium is housed inside the aforementioned housing section.

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