Manufacturing method for wound bodies

Abstract

This invention provides a method for manufacturing a wound body using the core after the packaging material has been used up. [Solution] A core is used, which, when mounted on the outer circumference of a rotatably provided support shaft, has a first recess that fits into a first projection provided at the base end of the support shaft, allowing it to rotate integrally with the support shaft, and when mounted on the outer circumference of the support shaft, has a second recess that engages with a second projection provided at the tip of the support shaft, so that the first projection and the first recess are aligned in the circumferential direction of the support shaft. A second winding body, which has been manufactured in advance, is attached to the core after the previously wound long sheet has been used up by winding a new long sheet onto a second core having an inner diameter larger than the outer diameter of the first core.

Description

Technical Field

[0001] The present invention relates to a method for manufacturing a wound body in a state where a packaging material, which is a strip-shaped sheet, is wound.

Background Art

[0002] There exists a pharmaceutical packaging device that uses a packaging material, which is a strip-shaped sheet, to package pharmaceuticals. An example of a support device for the packaging material included in such a pharmaceutical packaging device is described in Patent Document 1. The configuration described in Patent Document 1 has a support shaft (paper feed drum) protruding from a base (referred to as "machine body" in the description of Patent Document 1; the same applies to the following parentheses). The support shaft is rotatably supported by the base. A core body (core cylinder) is attached to the outer periphery of the support shaft. A packaging material (packaging paper) is wound around the outer periphery of the core body to form a roll-shaped wound body. Pharmaceuticals can be packaged with respect to the packaging material sequentially drawn out from the wound body.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Here, recently, for example, resource conservation has been demanded.

[0005] Therefore, an object of the present invention is to provide a method for manufacturing a wound body that can repeatedly use the core body by reusing the core body after the packaging material has been used up.

Means for Solving the Problems

[0006] The present invention relates to a core body, formed in a cylindrical shape, on which a long sheet can be wound around its outer circumference, having a cylindrical inner circumference, having one end and the other end, the inner circumference having a first recess provided at the position of the one end and recessed radially outward, and a second recess provided extending from the position of the one end to the position of the other end and recessed radially outward, the amount of radial outward recess relative to the inner circumference being smaller than that of the first recess, and can be attached from the one end side to the outer circumference of a rotatably mounted support shaft, and when attached to the outer circumference of the support shaft, the first recess is at the base end of the support shaft The method for manufacturing a winding body involves using a core body, which, by fitting into a first projection provided at a position, becomes rotatable integrally with the support shaft, and when mounted on the outer circumference of the support shaft, the second recess engages with a second projection provided at the tip of the support shaft, thereby aligning the first projection and the first recess in the circumferential direction of the support shaft, and attaching a second winding body, which has been manufactured in advance, to the core body after the first long sheet that was previously wound around it has been used up, by winding a new long sheet onto a second core body having an inner diameter larger than the outer diameter of the first core body.

[0007] According to this, the core can be reused repeatedly.

[0008] Furthermore, when the second winding body is attached to the core body, a spacer can be interposed between the outer circumferential surface of the core body and the inner circumferential surface of the second core body.

[0009] According to this, the difference between the outer diameter of the core body and the inner diameter of the second core body can be adjusted. [Effects of the Invention]

[0010] This invention allows for the repeated use of the core by reusing the core after the packaging material has been used up. [Brief explanation of the drawing]

[0011] [Figure 1] This is a perspective view showing the schematic configuration of the packaging section in a pharmaceutical packaging device according to one embodiment of the present invention. [Figure 2] This is a perspective view showing the support shaft and the core body of the winding section within the aforementioned packaging. [Figure 3] This is a half-sectional perspective view along the axis of the aforementioned core body. [Figure 4] This is a perspective view showing the core body in the state of being attached to the support shaft within the packaging. [Figure 5] This diagram illustrates how the core body is aligned in the circumferential direction with respect to the support shaft. [Modes for carrying out the invention]

[0012] Next, we will describe one embodiment of the present invention, which involves a combination of a winding body 6 and a drug packaging device 1. In the following description, "base end" corresponds to the left side in Figure 2, and "tip end" corresponds to the right side in Figure 2. Also, in the following description, "axial direction" refers to the axial direction of the support shaft 31.

[0013] -Overview of the Packaging Department- Figure 1 schematically shows the packaging section 2 of the pharmaceutical packaging device 1, which is the part that packages the pharmaceutical. The pharmaceutical (not shown) is, for example, a tablet or powder. The packaging material 62 used in this pharmaceutical packaging device 1 is a strip-shaped, long sheet. The material of the packaging material 62 is, for example, paper or resin. The packaging material 62 is conveyed in the longitudinal direction (direction of arrow F shown in the figure). The packaging material 62 is wound around the outer circumference of a core body 61 to form a roll-shaped winding body (packaging roll) 6. That is, the winding body 6 is constructed by winding a long sheet-shaped packaging material 62. In the winding body 6, the packaging material 62 is wound around the outer circumference of the core body 61 in a state where it is folded in half in the width direction (short direction) center. The packaging material 62 is unwound from the winding body 6. The pharmaceutical packaging device 1 packages the pharmaceutical using the packaging material 62 unwound from the winding body 6. In the pharmaceutical packaging device 1, the packaging section 2 is arranged in the following order from upstream to downstream in the direction of transport of the packaging material 62: packaging material supply section 3, packaging material transport section 4, and packaging body forming section 5. These will be explained below. For convenience, the packaging material supply section 3 will be explained later.

[0014] -Packaging material conveyance department- The packaging material conveying unit 4 conveys the packaging material 62 in the longitudinal direction and supplies it to the packaging body forming unit 5 downstream in the conveying direction. The packaging material conveying unit 4 mainly includes a tension adjustment mechanism 41 and a folding bar 42. The tension adjustment mechanism 41 is a mechanism that adjusts tension by bridging the packaging material 62 so as to fold it between a plurality of rollers 411 to 413 whose interaxial distance varies. In this embodiment, the tension adjustment mechanism 41 is, for example, a combination of two fixed rollers 411 and 412 whose axial positions are fixed and one dancer roller 413 that moves so that its axial position is curved relative to the base. The folding bar 42 changes the conveying direction of the packaging material 62 that is conveyed upward from the tension adjustment mechanism 41 to a diagonally downward direction. The packaging material conveying unit 4 can be provided with a printing unit 43 for printing, for example, drug prescription information on the surface of the packaging material 62.

[0015] -Package formation department- The packaging forming section 5 is the part that supplies the drug to the packaging material 62 according to the prescription and packages each package by bonding the packaging material 62 together. The packaging forming section 5 mainly comprises a triangular plate 51, a hopper 52, and a packaging material bonding section 53. The triangular plate 51 is located downstream of the folding bar 42 in the transport direction and is the part that pushes open one side and the other side of the packaging material 62, which is folded in half in the width direction, to create a V-shaped cross-section when viewed in the longitudinal direction. The hopper 52 has a lower part 522 that is formed with a reduced cross-sectional area compared to the upper part 521, into which a portion of the lower part 522 is inserted into the V-shaped space 62S formed when the packaging material 62 is pushed open by the triangular plate 51. The drug supplied according to the prescription is supplied to the packaging material 62 via the inside of the hopper 52 by a drug supply mechanism (not shown) provided above the hopper 52. The packaging material bonding section 53 is the part that heat-seals the packaging material 62 to bond it so that each individual packaging material 62 containing the drug is divided into separate packages. In addition, the packaging body forming section 5 may be provided with, for example, a perforation forming section (not shown) for forming perforations in the packaging material 62 bonded by the packaging material bonding section 53 to facilitate cutting.

[0016] -Packaging material supply department- The packaging material supply unit 3 is a part that sends the packaging material 62 to the subsequent packaging material conveyance unit 4. A winding body 6 is arranged in the packaging material supply unit 3 so as to be rotatable in the circumferential direction. By rotating the winding body 6, the packaging material 62 is drawn out from the winding body 6 in the longitudinal direction.

[0017] As shown in FIG. 2, the packaging material supply unit 3 includes a support shaft 31. The support shaft 31 is provided so as to protrude from a base (not shown). A part of the packaging material conveyance unit 4 (the tension adjustment mechanism 41 shown in FIG. 1) is also provided on this base. The support shaft 31 is substantially cylindrical. The support shaft 31 has a cylindrical outer peripheral portion. The support shaft 31 has a base end portion (the left - hand portion in the figure) and a tip end portion (the right - hand portion in the figure). The base end portion of the support shaft 31 is supported by the base. The support shaft 31 includes a main shaft portion 311 having a certain diameter dimension, and a base end shaft portion 312 located on the base end side of the main shaft portion 311 and having a larger diameter dimension than the main shaft portion 311. A step is formed between the main shaft portion 311 and the base end shaft portion 312 as shown in the figure.

[0018] The support shaft 31 is provided so as to be rotatable with respect to the base and supports the winding body 6 (core body 61). The support shaft 31 is rotated by a drive unit such as a stepping motor (not shown) provided inside the base. The rotation of the support shaft 31 is in both the drawing - out direction and the drawing - in direction of the packaging material 62. Also, corresponding to the supply of the packaging material 62 to the package forming unit 5, the rotation of the support shaft 31 is intermittent. The support shaft 31 is supported in a cantilever manner with respect to the base, and the tip end portion of the support shaft 31 is open. Therefore, as shown in FIG. 2, by arranging the core body 61 in the winding body 6 at the axial extension position on the open side of the support shaft 31 and inserting the winding body 6 axially from the tip end side toward the base end side, the winding body 6 (only the core body 61 is shown in FIG. 4) can be attached to the support shaft 31 as shown in FIG. 4. The winding body 6 is attached to the support shaft 31 so as not to be relatively rotatable.

[0019] The support shaft 31 of the present embodiment is formed to have a longer axial length than the winding body 6. Therefore, as shown in FIG. 4, in the mounted state (the state of being mounted on the support shaft main body 31A), a part of the support shaft 31 (mounting assistance portion 31B) protrudes from the core body 61. However, it is not limited to this, and the other end portion (described later) of the core body 61 in the mounted state and the tip end portion of the support shaft 31 may coincide.

[0020] Also, a part on the tip end side of the support shaft 31 protruding from the core body 61 (the portion where the guide protrusion 317 is formed) is a mounting auxiliary tool 31B that is separate from the support shaft main body 31A which is the base end side portion of the support shaft 31, and is mounted on the support shaft main body 31A. This mounting auxiliary tool 31B can be used in combination with the winding body 6 of the present embodiment. The mounting of the mounting auxiliary tool 31B to the support shaft main body 31A is, for example, by diverting the fitting structure for attaching the tip end cover provided on the support shaft provided in an existing drug packaging device (removing the tip end cover and then attaching the mounting auxiliary tool 31B), or by adhesion to an existing support shaft (not limited to this, and various mounting modes are possible). The support shaft main body 31A has a cylindrical outer peripheral portion. The mounting auxiliary tool 31B becomes a mounting assistance portion that is a part of the support shaft 31 in the state of being mounted on the support shaft main body 31A. This configuration can be formed into the support shaft 31 of the present embodiment, for example, by mounting it so as to replace the lid member provided at the tip of a short support shaft. By the mounting auxiliary portion 31B attached to the tip end portion of the support shaft main body 31A, the support shaft 31 of the present embodiment can be formed without significantly modifying the support shaft provided in an existing drug packaging device. Therefore, the combination of the winding body 6 of the present embodiment and the drug packaging device 1 can be realized at low cost. However, for example, in a newly manufactured support shaft 31, it may have an integral structure in which the support shaft main body 31A and the mounting auxiliary portion 31B are inseparable instead of such a separate structure.

[0021] As shown in Figure 2, the base end shaft portion 312 of the support shaft 31 has multiple (four in this embodiment) hooking protrusions 313 as first projections. The multiple hooking protrusions 313-313 are provided at a certain distance apart (spaced apart) in the circumferential direction (rotational direction). Each hooking protrusion 313 protrudes radially outward from the outer circumferential surface of the base end of the support shaft 31. Each hooking protrusion 313 extends axially for a predetermined distance from the base end of the support shaft 31 toward the tip. A rod-shaped packaging break detection pin 314 protrudes radially from some of the multiple hooking protrusions 313-313 (every other hooking protrusion 313 in the circumferential direction in this embodiment). The tip of the packaging break detection pin 314 is set to be located radially outward from the outer circumferential surface of the core body 61 when the winding body 6 is attached to the support shaft 31. Furthermore, the hook projection 313, on which the packaging material break detection pin 314 is provided, is provided with a notch 315 that penetrates radially and extends axially.

[0022] The packaging break detection pin 314 is biased toward the tip side (to the right in the diagram) in the axial direction of the support shaft 31 by the biasing force of a spring (not shown) provided inside the support shaft 31. When the wound body 6 on which the packaging material 62 is wound is attached to the support shaft 31, the packaging break detection pin 314 is pushed laterally by the packaging material 62 which is stacked radially on the outer circumference of the core body 61, thereby moving toward the axial base end side against the spring biasing force. In the core body 61 of the wound body 6, a notch 611 is provided in the portion that coincides with the packaging break detection pin 314 when attached to the support shaft 31, similar to the support shaft 31, and penetrates radially and extends axially. The notch 611 is positioned to coincide circumferentially with the notch 315 of the support shaft 31. For this reason, the core body 61 may be rotated circumferentially with the support shaft 31 by the operator in order to align the notch 611 (this point will be explained later). When the packaging material 62 is pulled out of the winding body 6 and disappears (i.e., when only the core body 61 remains), the pushing action by the packaging material 62 ceases, causing the spring-biased packaging material break detection pin 314 to move axially towards the tip and enter the notch 611 (see Figure 4). By detecting that the packaging material break detection pin 314 has entered the notch 611 using a sensor or the like, the break in the packaging material can be detected. By detecting that all of the packaging material 62 has been unwound from the winding body 6, the packaging material supply unit 3 can be automatically stopped, for example.

[0023] A displacement restricting portion 316 protrudes from the outer circumferential surface of the support shaft 31. At least one displacement restricting portion 316 is provided (two in this embodiment, although not shown in the figure). When multiple displacement restricting portions 316 are provided as in this embodiment, these multiple displacement restricting portions 316 are provided at a certain distance (spaced apart) in the circumferential direction. In this embodiment, the two displacement restricting portions 316 are positioned at equal intervals in the circumferential direction (i.e., at 180-degree intervals). Also, in this embodiment, the displacement restricting portion 316 is provided at the same position as one of the multiple (four in this embodiment) hooking protrusions 313 to 313 in the circumferential direction. The displacement restricting portion 316 is, for example, spherical or hemispherical, biased radially outward by a spring provided inside the support shaft 31, and is a projection in which a part protrudes from the outer circumferential surface of the support shaft 31. The displacement restricting portion 316 is provided so as to be able to extend and retract from the outer circumferential surface of the support shaft 31. This displacement-restricting portion 316 engages with the stepped portion 612 of the core body 61, which will be described later. As a result, the core body 61 is prevented from shifting axially relative to the support shaft 31, and the winding body 6 can be securely attached to the support shaft 31.

[0024] At least one (four in this embodiment) guide projections 317, which serve as second projections, are formed at the tip of the support shaft 31 (main shaft portion 311). When multiple guide projections 317 are formed as in this embodiment, these multiple guide projections 317-317 are provided at a certain distance (spaced apart) in the circumferential direction. Each guide projection 317 protrudes radially outward from the outer circumferential surface of the tip of the support shaft 31. Each guide projection 317 protrudes between the multiple hook projections 313-313 in the circumferential position. In other words, in an axial view, each hook projection 313 and each guide projection 317 are positioned alternately. In this embodiment, each hook projection 313 and each guide projection 317 are positioned alternately at equal intervals in the circumferential direction. Furthermore, each guide projection 317 protrudes radially outward from the outer circumferential surface of the support shaft body 31A less than each hook projection 313.

[0025] As shown in Figure 2, the guide projection 317 integrally comprises a main body portion 3171 of a constant width and a tapered portion 3172 provided on the tip side of the main body portion 3171, with its width narrowing towards the tip. The tapered portion 3172 has a bevel at its widthwise end. In this embodiment, this bevel is formed in a straight line when viewed radially, but it is not limited to this and can be in other shapes such as a curved line. Also, in this embodiment, this bevel is symmetrical with respect to the axial direction, but it may be asymmetrical.

[0026] As the core body 61 is inserted onto the support shaft 31, the inner circumferential surface 617 of the core body 61 comes into contact with the guide projection 317, thereby aligning the core body 61 circumferentially with respect to the support shaft 31 (the alignment of the core body 61 will be explained later). Figure 5 shows this. Incidentally, for ease of understanding, Figure 5 shows the guide projection 317 (dotted line) moving axially relative to the core body 61, but in reality, the opposite is true; the core body 61 moves axially relative to the guide projection 317. At this time, the support shaft 31 and the core body 61 rotate circumferentially relative to each other to align. The support shaft 31 may be immobile in the circumferential direction, and the core body 61 may rotate circumferentially relative to the support shaft 31, or the core body 61 may be immobile in the circumferential direction, and the support shaft 31 may rotate circumferentially relative to the core body 61. Both the support shaft 31 and the core body 61 may rotate circumferentially.

[0027] The guide projection 317 is located at a different position in the axial direction from the hook projection 313. Specifically, the guide projection 317 is located at the tip of the support shaft 31, while the hook projection 313 is located at the base end of the support shaft 31. By being located at different positions in this way, the hook recess 615 of the core body 61 can be fitted into the hook projection 313 of the support shaft 31 with sufficient time after the circumferential alignment of the core body 61 is completed. In particular, since the guide projection 317 in this embodiment is located at the tip of the support shaft 31, the alignment of the core body 61 is performed at the beginning of the insertion process, rather than at the end. Therefore, the operation of attaching the winding body 6 to the support shaft 31 is improved. Furthermore, on the core body 61 side, the mechanism for transmitting rotational force from the support shaft 31 (the hook recess 615 in this embodiment) and the mechanism for circumferential alignment (the guide recess 616 in this embodiment) can be distributed axially rather than concentrated at one end of the core body 61 in the axial direction. Therefore, it is possible to suppress the decrease in strength of one axial end of the core body 61 compared to the strength of the other ends.

[0028] -Core of the wound body- As shown in Figure 2, the core 61 of the winding body 6 is cylindrical or tubular with a circular radial cross-sectional shape. The core 61 has a cylindrical inner circumference. As shown in Figure 1, the packaging material 62 is wound around the outer circumference of the core 61. The outer diameter of the core 61 is constant in the axial direction. Therefore, no steps appear on the outer circumference of the core 61, and the packaging material 62 can be wound around it without creating creases. The core 61 is attached and detached (mounted and removed) by moving it axially relative to the outer circumference of the support shaft 31 in the packaging material supply unit 3. The core 61 is aligned in the circumferential direction of the support shaft 31 and mounted on the outer circumference of the support shaft 31. The core 61 has one end and the other end. One end is the part closer to the support shaft 31 in Figure 2, and the other end is the part further away from the support shaft 31 in Figure 2. The core body 61 is mounted on the support shaft 31 from one end in the normal orientation (mounting direction). During mounting, the core body 61 is moved axially from the tip to the base end of the support shaft 31. The core body 61 has a notch 611 at its base end in the direction of mounting to the support shaft 31 (normal mounting direction). The notch 611 is positioned to correspond to the packaging material break detection pin 314 that protrudes radially outward from the support shaft 31 when the core body 61 is mounted on the support shaft 31. The notch 611 penetrates the core body 61 radially and has a space that opens at the base end of the core body 61. In this space, the packaging material break detection pin 314 can move axially in the support shaft 31. This movement occurs after the packaging material 62 has been pulled out and is gone from the winding body 6 (Figure 4 shows the state after the movement). Incidentally, this notch 611 can also be used as a visual or tactile cue for the worker to identify the direction of the wound body 6.

[0029] As shown in Figure 2, a stepped portion 612 is formed on the inner circumference of the core body 61 towards the tip. Multiple stepped portions 612 (four in this embodiment) are intermittently provided in the circumferential direction. A displacement restricting portion 316, which protrudes from the support shaft 31, engages with this stepped portion 612. This prevents the core body 61 from shifting axially relative to the support shaft 31, and ensures that the wound body 6 is securely attached to the support shaft 31. On the other hand, since the displacement restricting portion 316 is spring-biased, for example, when removing the core body 61 from the support shaft 31, if the core body 61 is moved axially with a force that overcomes the biasing force of the spring, the core body 61 will move relative to the support shaft 31. Therefore, the core body 61 can be removed from the support shaft 31 without any particular difficulty.

[0030] The core body 61 includes a plurality of magnet holders 613-613 that hold permanent magnets in combination corresponding to magnetic detection units such as magnetic sensors provided by the packaging material supply unit 3 for identifying the winding body 6. Permanent magnets are placed in a predetermined number of selected magnet holders 613-613 from the plurality of magnet holders 613 (the drawing shows magnet holders 613 without permanent magnets). Specifically, "identification of the winding body 6" refers to identifying the material of the packaging material 62. The magnetic detection unit detects the number of magnet holders 613 with permanent magnets, the polarity of the permanent magnets, or the strength of the magnetic force in the plurality of magnet holders 613-613 to perform identification. Note that these magnet holders 613 are unnecessary in pharmaceutical packaging devices configured to identify the winding body 6 by means other than magnetism, such as electromagnetic detection using an RFID tag that can be wirelessly identified, such as an IC chip, or optical detection using a 2D code, or in pharmaceutical packaging devices in which the magnetic detection unit has been removed or disabled by modification.

[0031] The core body 61 is provided with a hooking recess 615 as a first recess, a guide recess 616 as a second recess, and an inner circumferential surface portion 617 on its inner circumference. Multiple sets of the hooking recess 615, guide recess 616, and inner circumferential surface portion 617 are provided in the circumferential direction. These can be provided at equal intervals in the circumferential direction. In this embodiment, four sets of these portions 615-617 are provided at equal intervals in the circumferential direction. However, only one set can be provided, or multiple sets can be provided at unequal intervals. Furthermore, these portions 615-617 are provided asymmetrically in the axial direction, as shown in Figures 2 and 3.

[0032] The hook recess 615 is provided on the inner circumference of one end of the core body 61. When mounted on the support shaft 31, the hook recess 615 engages with the hook projection 313 on the support shaft 31, thereby transmitting rotational force in the circumferential direction between the support shaft 31 and the core body 61. In other words, when the core body 61 is mounted on the outer circumference of the support shaft body 31A, the hook projection 313 and the hook recess 615 engage, allowing the support shaft body 31A and the core body 61 to rotate integrally around the central axis of the outer circumference of the support shaft body 31A. The number of hook recesses 615 matches the number of hook projections 313 on the support shaft 31. Also, the number of sets consisting of guide recesses 616 and inner circumferential surface portions 617 matches the number of guide projections 317 on the support shaft 31. However, the number of hook recesses 615 can be greater than the number of hook projections 313 on the support shaft 31. Furthermore, the number of sets consisting of guide recesses 616 and inner circumferential surfaces 617 can be made larger than the number of guide protrusions 317 on the support shaft 31.

[0033] The guide recess 616 is provided on the inner circumference of the core body 61, extending from one end on the axial side to the other end on the axial side. The inner diameter of the guide recess 616 is larger than the outer diameter of the support shaft 31. Compared to the hook recess 615, the guide recess 616 has a smaller radially outward recess relative to the inner circumference of the core body 61 (more specifically, the inner surface, and even more specifically, the inner surface of the inner surface portion 617 or the thickened portion 619). Therefore, a reduction in the strength of the core body 61 due to recessing can be prevented. The guide recess 616 is formed at one end of the core body 61 and extends around the entire circumference of the core body 61 (part 6162a shown in Figure 3). Therefore, when extrapolating the core body 61 to the mounting auxiliary portion 31B, it is not necessary to align the mounting auxiliary portion 31B and the core body 61 around the central axis, thus simplifying the process. The guide recess 616 engages with the guide projection 317 when the core body 61 is mounted on the support shaft 31, thereby positioning it circumferentially on the support shaft 31. In other words, when the core body 61 is mounted on the outer circumference of the support shaft body 31A, the guide projection 317 and the guide recess 616 engage, aligning the guide projection 317 and the guide recess 616 circumferentially around the central axis of the outer circumference of the support shaft body 31A. The guide recess 616 has a positioning portion 6161 located on the other end side, which has a constant width (circumferential dimension) and extends axially, and a guiding portion 6162 that extends axially continuously from one end side of the positioning portion 6161, and whose width (circumferential dimension) widens towards the one end side. The width dimension of the positioning portion 6161 is approximately the same as the width dimension of the guide projection 317. More specifically, the width dimension of the guide projection 317 is larger (slightly larger) than the width dimension of the guide projection 317, to the extent that it allows the core body 61 to move in the axial direction relative to the guide projection 317.

[0034] In the part of the guide section 6162 where the inner circumferential surface 617 overlaps in the axial direction, the circumferential dimension decreases as you move from one end to the other, so the core body 61 can be moved in the circumferential direction in accordance with this reduction (see Figure 5, however, Figure 5 shows the movement and immobility of the core body 61 and the guide projection 317 in the opposite direction to reality). Then, the hooking recess 615 of the core body 61 aligns with the hooking projection 313 of the support shaft 31. In this way, the core body 61 rotates relative to the support shaft 31 and is aligned in the circumferential direction.

[0035] Furthermore, in the part of the guide portion 6162 where the inner circumferential surface portion 617 does not overlap in the axial direction, 6162a (see Figure 3), the action of moving the core body 61 in the circumferential direction by contact with the guide projection 317 is not performed. This part 6162a acts to facilitate the attachment of the core body 61 to the support shaft 31. In other words, the guide portion 6162 has an inner diameter larger than the outer diameter of the support shaft 31 and is exposed at one end of the core body 61 on the axial side. In this embodiment, it is exposed around the entire circumference in the circumferential direction. That is, the inner diameter of the end of the core body 61 on the axial side has a "loose" relationship with the outer diameter of the support shaft 31, due to the exposed guide portion 6162. For this reason, inserting the wound body 6 (core body 61) onto the support shaft 31 is easier compared to a configuration with no dimensional clearance. Incidentally, the wound body 6, with the packaging material 62 wound around the core body 61, is heavy (especially a new wound body 6, which is particularly heavy because the packaging material 62 has not been consumed at all), so the ease of insertion is a great advantage for users of the drug packaging device 1. Incidentally, this effect is also due to the effect of the thin-walled section 618, which will be described later.

[0036] Here, the portion 6162a of the guiding section 6162 in which the inner circumferential surface portion 617 does not overlap in the axial direction can be described as a "free region" that allows rotation of the core body 61 without restriction. The positioning section 6161 can also be described as a "restricted region" in which rotation of the core body 61 is restricted to the extent that it is practically impossible (more specifically, there is only enough circumferential play to axially shift the guide recess 616 of the core body 61 relative to the guide projection 317 of the support shaft 31). The portion 6162b of the guiding section 6162 in which the inner circumferential surface portion 617 overlaps in the axial direction can also be described as a "transition region" in which the range of rotation of the core body 61 is smaller at the other end than at the one end in the axial direction. The guide recess 616 is continuous from one end in the axial direction to the other end, in the order of free region, transition region, and restricted region.

[0037] The inner circumferential surface portion 617 is the portion adjacent to the guide recess 616 in the circumferential direction. The inner circumferential surface portion 617 is thicker (larger in radial dimension) than the guide recess 616. The inner circumferential surface portion 617 is provided on the inner circumference of the core body 61, extending from the other end in the axial direction to the one end in the axial direction, and does not reach the edge of the core body 61 at the one end in the axial direction, with the tip located between the axial center and the edge of the one end in the axial direction. In this embodiment, the tip is formed at a position adjacent to the other end in the axial direction of the hook recess 615. The tip portion of the inner circumferential surface portion 617 has the opposite shape to the guide portion 6162, with the circumferential dimension decreasing as it moves from the other end to the one end. The shape of the inner circumferential surface portion 617 is asymmetrical in the axial direction.

[0038] The surface of the inner circumferential surface portion 617 is a curved surface that curves with a constant curvature in the circumferential direction. The circumferential curvature of the surface of the inner circumferential surface portion 617 is the same as (approximately the same as) the circumferential curvature of the outer surface of the support shaft 31. Because the surface of the inner circumferential surface portion 617 is a curved surface with a wide spread, the inner circumferential surface portion 617 makes surface contact with the outer surface of the support shaft 31 when the core body 61 is mounted. Here, for example, in a configuration in which multiple projections extending in the axial direction are formed on the inner circumferential surface of the core body, line contact occurs with the outer surface of the support shaft, and deformation (distortion) may occur in the main body of the core body, which is floating relative to the support shaft, due to "winding tightening" which will be explained later. In contrast, in this embodiment, since the surface of the inner circumferential surface portion 617 makes surface contact with the outer surface of the support shaft 31, the possibility of the aforementioned deformation (distortion) occurring in the core body 61 can be reduced.

[0039] Because the inner circumferential surface portion 617 is thick and the guide recess 616 is thin, a step is formed between the inner circumferential surface portion 617 and the guide recess 616. In other words, the circumferential edges of the positioning portion 6161 and the guiding portion 6162 of the guide recess 616 are defined by the inner circumferential surface portion 617. The inner circumferential surface portion 617 has a core-side slope 6171 that defines the widthwise (circumferential) edge of the guiding portion 6162 of the guide recess 616 (see Figures 4 and 5).

[0040] As described above, when attempting to attach the core body 61, which has a hook recess 615, a guide recess 616, and an inner circumferential surface portion 617, to the support shaft 31 from one end, first, the guiding portion 6162 of the core body 61 is positioned relative to the guide projection 317 of the support shaft 31. Further movement of the core body 61 in the axial direction changes the positioning portion 6161 of the core body 61 relative to the guide projection 317 (see the position change indicated by the arrow in Figure 5).

[0041] The positioning section 6161 also serves as a guide for the guide projection 317. This positioning section 6161, acting as a guide, is located at the other end of the core body 61 and is connected to the guide section 6162. It guides the guide projection 317 so that when the core body 61 is mounted on the outer circumference of the support shaft body 31A, the hook projection 313 and the hook recess 615 remain aligned in the circumferential direction around the central axis of the outer circumference of the support shaft body 31A. This makes the process easier because it is not necessary to intentionally maintain the alignment of the support shaft body 31A and the core body 61 around the central axis when mounting the core body 61 to the support shaft body 31A.

[0042] Furthermore, the guide portion 6162 decreases in width (circumferential dimension) as it moves from one end to the other of the core body 61, guiding the guide projection 317 so that the hook projection 313 and the hook recess 615 are aligned in the circumferential direction around the central axis of the outer circumference of the support shaft body 31A when the core body 61 is mounted on the outer circumference of the support shaft body 31A. As a result, when mounting the core body 61 to the support shaft body 31A, it is not necessary to intentionally align the support shaft body 31A and the core body 61 around the central axis, thus simplifying the process.

[0043] Here, when the guide projection 317 is located at the circumferential end of the guide portion 6162, the edge of the guide portion 6162, i.e., the core body side slope 6171, comes into contact with the guide projection 317. This guides the core body 61 so that its positioning portion 6161 aligns with the guide projection 317. As the core body 61 is moved further axially, the guide projection 317 and the positioning portion 6161 of the core body 61 engage with each other, and a portion of the hook projection 313 and a portion of the hook recess 615 engage. As the core body 61 is moved further axially, the positioning portion 6161 of the core body 61 disengages from the guide projection 317, and the hook projection 313 and the hook recess 615 fully engage, finally resulting in the state shown in Figure 4.

[0044] The edge of the guide portion 6162 (core body side slope 6171) may come into contact with the slope of the retracted portion 3172 of the guide projection 317 (see Figure 5). Here, the axial inclination of the core body side slope 6171, which is the edge of the guide portion 6162, and the slope of the retracted portion 3172 of the guide projection 317 are approximately the same. Therefore, the contact is smooth.

[0045] As described above, the core body 61 of this embodiment is easily attached to the support shaft 31 by the guide recess 616, and the strength of the core body is ensured by the inner circumferential surface portion 617.

[0046] The core body 61 also includes a thin-walled portion 618 and a thick-walled portion 619. The thin-walled portion 618 is provided on the inner circumference on one axial end. The thin-walled portion 618 also fits onto the base end shaft portion 312 of the support shaft 31 when the core body 61 is mounted on the support shaft 31. The thick-walled portion 619 is provided on the inner circumference on the other axial end and fits onto the main shaft portion 311 of the support shaft 31 when mounted on the support shaft 31. The thick-walled portion 619 has a greater wall thickness than the thin-walled portion 618. The thin-walled portion 618 corresponds to the aforementioned guide recess 616, and the thick-walled portion 619 corresponds to the aforementioned inner circumferential surface portion 617. The purpose of the thin-walled portion 618 differs from that of the aforementioned guide recess 616, but the area in which it is formed on the inner circumference of the core body 61 is the same as that of the aforementioned guide recess 616. Furthermore, the formation ranges of the thin-walled portion 618 and the guide recess 616 can be made different. The purpose of the thick-walled portion 619 differs from that of the inner circumferential surface portion 617 described above, but the formation range on the core body 61 is the same as that of the inner circumferential surface portion 617 described above. Furthermore, the formation ranges of the thick-walled portion 619 and the inner circumferential surface portion 617 can be made different.

[0047] In the manufacturing process of the wound material, a phenomenon called "winding tightening" can occur due to residual stress (a force that compresses in the longitudinal direction) in the packaging material after winding, as well as ambient temperature and humidity. This "winding tightening" applies a compressive force in the radial direction to the core. This compressive force can cause thin-walled sections to deform inward, resulting in an irregular shape around the core. This can lead to uneven packaging material delivery and unstable drug packaging.

[0048] In this embodiment, the core body 61 has a thin-walled portion 618 that fits onto the base end shaft portion 312 of the support shaft 31, and a thick-walled portion 619 that fits onto the main shaft portion 311 of the support shaft 31. The base end shaft portion 312 of the support shaft 31 has a larger diameter than the main shaft portion 311. The outer diameter of the base end shaft portion 312 of the support shaft 31 and the inner diameter of the thin-walled portion 618 of the core body 61 are the same to the extent that they can be inserted. Similarly, the outer diameter of the main shaft portion 311 of the support shaft 31 and the inner diameter of the thick-walled portion 619 of the core body 61 are the same to the extent that they can be inserted. By fitting the core body 61 onto the support shaft 31, the gap between the support shaft 31 and the core body can be reduced. This eliminates any gap that would allow the core body 61 to deform to the extent that it would affect the feeding of the packaging material 62. Therefore, the core body 61, which is physically supported by the support shaft 31, can resist the compressive force of the winding caused by the wound packaging material 62. In particular, in the region 619a of the core body 61 on the side of the axial center other than the axial center, the thicker portion 619 occupies a larger proportion in the circumferential direction than the thinner portion 618. For this reason, this region 619a contributes significantly to resisting the compressive force of the winding.

[0049] -Reuse of used wicks- The core 61 is formed from, for example, a hard resin. Therefore, the core 61 can be reused many times by reusing it after the packaging material 62 has been used up. This can contribute to saving petroleum resources, for example. Reuse is performed by winding new packaging material 62 around the used core 61 collected from the user of the pharmaceutical packaging device 1. A new winding body 6 is manufactured by winding new packaging material 62 around the core 61 to be reused. In order to facilitate collection, the core 61 portion of the winding body 6 handed over to the user is loaned out, thereby encouraging the user to return the core 61.

[0050] The winding of new packaging material 62 onto the used core 61 may be performed, for example, by winding the new packaging material 62 onto a separate core (such as a paper tube) having an inner diameter larger than the outer diameter of the core 61, thereby attaching a pre-fabricated packaging roll (replacement winding body) to the used core 61. When this method is used, the difference between the outer diameter of the core 61 and the inner diameter of the separate core can be adjusted by interposing a spacer such as a rubber ring between the used core 61 and the separate core.

[0051] The manufacture of the new winding 6 may be carried out by the supplier of the winding 6, or the user may carry out the manufacturing work as instructed by the supplier of the winding 6 to the user. In the latter case, the used core 61 will not be collected but will remain with the user. The instructions from the supplier of the winding 6 to the user may be explicit or implicit. The latter implicit instructions may include simply providing the user with a replacement winding.

[0052] -Possibility of changing form- Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the invention. [Explanation of symbols]

[0053] 1. Drug packaging device 2 Packaging Department 3 Packaging material supply department 31 Support shaft 31A Support shaft body 31B Mounting aid (mounting aid) 311 Main shaft part 312 Proximal shaft part 313 Hooking projection, first projection 317 Guide projection, second projection 4 Packaging material transport section 5 Package forming section 6-volume body 61 Core body 615 Hook recess, first recess 616 Guide recess, second recess 6161 Positioning section, guide section 6162 Guidance part 617 Inner peripheral surface section 618 Thin-walled section 619 Thick wall part 62 Packaging material

Claims

1. It is the core, Formed in a cylindrical shape, A long sheet can be wrapped around the outer circumference. It has a cylindrical inner circumference and has one end and the other end, The inner circumference portion includes, A first recess is provided at the position of one end, which is recessed radially outward, A second recess is formed, extending from the position of one end to the position of the other end, recessed radially outward, and having a smaller radially outward recess relative to the inner circumference compared to the first recess. It can be attached to the outer circumference of a rotatably mounted support shaft, starting from one end. When mounted on the outer circumference of the support shaft, the first recess fits into the first projection provided at the base end of the support shaft, thereby allowing it to rotate integrally with the support shaft. When mounted on the outer circumference of the support shaft, the second recess engages with a second projection provided at the tip of the support shaft, thereby aligning the first projection and the first recess in the circumferential direction of the support shaft. A method for manufacturing a winding body, comprising attaching a second pre-fabricated winding body to the aforementioned core body after the first long sheet that was previously wound around it has been used up, by winding a new long sheet onto a second core body having an inner diameter larger than the outer diameter of the first core body.

2. The method for manufacturing a winding body according to claim 1, wherein, when the second winding body is attached to the core body, a spacer is interposed between the outer circumferential surface of the core body and the inner circumferential surface of the second core body.

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