JP2023133593A - Method of recycling core body - Google Patents

Abstract

To provide a method of recycling a core body after using up a roll material.SOLUTION: A method of recycling a core body includes winding, after using up a long-sized sheet wound earlier on a core body, a new long-sized sheet on the core body using the core body that is formed, in an inner peripheral portion, with a first recess radially outwardly recessed in a position of one end and a second recess provided over from the position of the one end to the other end, recessed radially outwardly and having an amount of radially outward recess, relative to the inner peripheral portion, smaller as compared with the first recess, so that, when attached to an outer periphery of a rotatably provided support shaft, the first recess mates with a first projection provided in a position of a base end of the support shaft so as to be rotated integrally with the support shaft and, when attached to the outer periphery of the support shaft, the second recess mates with a second projection provided in a position of a tip of the support shaft so that the first projection and the first recess are positioned in a circumferential direction of the support shaft.SELECTED DRAWING: Figure 2

Description

The present invention relates to a method for recycling a core constituting a wound body in which a packaging material, which is a belt-shaped sheet, is wound.

2. Description of the Related Art There is a drug packaging device that packages drugs using a packaging material that is a band-shaped sheet. An example of a packaging support device included in such a drug packaging device is described in Patent Document 1. In the configuration described in Patent Document 1, a support shaft (paper feed drum) protrudes from a base ("machine" in the description of Patent Document 1, same applies to parentheses below), and the support shaft can be rotated by the base. is supported by A core body (core cylinder) is attached to the outer periphery of the support shaft. A wrapping material (wrapping paper) is wound around the outer periphery of the core to form a roll-shaped body. Medicines can be packaged in packaging materials that are sequentially pulled out from the rolled body.

Publication No. 56-44757

Nowadays, for example, there is a need to save resources.

Therefore, an object of the present invention is to provide a method for reusing a core, which allows the core to be used repeatedly by reusing the core after the packaging material is used up.

The present invention provides a core body, which is formed in a cylindrical shape, is capable of winding a long sheet around its outer periphery, has a cylindrical inner periphery, has one end and the other end, and has a cylindrical inner periphery, one end, and the other end. The peripheral portion includes a first recess provided at the one end and recessed radially outward, and a first recess provided extending from the one end to the other end and recessed radially outward. A second recess is formed that is smaller in radially outward recess with respect to the inner circumference than the first recess, and is attached to the outer circumference of the rotatably provided support shaft from the one end side. When the support shaft is mounted on the outer periphery of the support shaft, the first recess fits into the first protrusion provided at the proximal end of the support shaft, so that it is integrated with the support shaft. When mounted on the outer periphery of the support shaft, the second recess engages with the second protrusion provided at the tip of the support shaft. Using a core body in which the first protrusion and the first recess are aligned in the circumferential direction of the support shaft, and after the long sheet previously wound around the core body is used up, the core body This method involves winding a new long sheet around the core.

According to this, the core can be used repeatedly.

In the present invention, by reusing the core after the packaging material is used up, the core can be used repeatedly.

1 is a perspective view showing a schematic configuration of a packaging section in a medicine packaging device according to an embodiment of the present invention. It is a perspective view which shows the support shaft and the core body of a wound body among the said packaging parts. FIG. 3 is a half-sectional perspective view taken along the axis of the core body. It is a perspective view which shows the said core body which was made into the support shaft and the attached state among the said packaging parts. FIG. 6 is a diagram for explaining how the core body is aligned in the circumferential direction with respect to the support shaft.

Next, the present invention will be described by taking up one embodiment of the combination of the rolled body 6 and the medicine packaging device 1. In the following description, the "proximal side" corresponds to the left side in FIG. 2, and the "distal side" corresponds to the right side in FIG. 2. Moreover, the "axial direction" in the following description refers to the axial direction of the support shaft 31.

-Overview of the packaging department-
FIG. 1 schematically shows a packaging section 2, which is a part of the medicine packaging device 1 that packages medicines. The drug (not shown) is, for example, a tablet or a powder. The packaging material 62 used in this medicine packaging device 1 is a belt-shaped and 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 (in the direction of arrow F shown in the figure). The packaging material 62 is wound around the outer periphery of the core body 61 to form a rolled body (packaging material roll) 6. That is, the rolled body 6 is configured by winding a long sheet-like packaging material 62. In the rolled body 6, the packaging material 62 is wound around the outer periphery of the core body 61 in a state of being folded in half at the center in the width direction (short direction). The packaging material 62 is unwound from the roll 6. The drug packaging device 1 uses the packaging material 62 unwound from the roll 6 to package drugs. In the packaging section 2 of the drug packaging device 1, the packaging material supply section 3, the packaging material transport section 4, and the package forming section 5 are located in this order from the upstream side to the downstream side in the transport direction of the packaging material 62. These will be explained below. For convenience, the packaging material supply section 3 will be explained later.

-Packaging material conveyance section-
The packaging material conveyance section 4 conveys the packaging material 62 in the longitudinal direction and supplies it to the package forming section 5 on the downstream side in the conveyance direction. The packaging material conveying section 4 mainly includes a tension adjustment mechanism 41 and a folding bar 42. The tension adjustment mechanism 41 is a mechanism that adjusts the tension by folding the packaging material 62 between a plurality of rollers 411 to 413 whose center distances vary. The tension adjustment mechanism 41 of this embodiment is a combination of, for example, two fixed rollers 411 and 412 whose axes do not move, and one dancer roller 413 which moves so that its axis is curved with respect to the base. has been done. The folding bar 42 changes the direction of conveyance of the packaging material 62 conveyed upward from the tension adjustment mechanism 41 to diagonally downward. The packaging material conveyance unit 4 can be provided with a printing unit 43 that prints, for example, drug prescription information on the surface of the packaging material 62.

-Package forming part-
The package forming unit 5 is a part that supplies the drug to the packaging material 62 according to the prescription and wraps each package by bonding the packaging material 62. The package forming section 5 mainly includes a triangular plate 51, a hopper 52, and a packaging material adhesive section 53. The triangular plate 51 is located on the downstream side of the folding bar 42 in the conveying direction, and pushes open one side and the other side of the packaging material 62 that is half-folded in the width direction, thereby forming a V-shaped cross section when viewed in the longitudinal direction. This is the part that gives form. In the hopper 52, a part of the lower part 522, which is formed with a smaller cross-sectional area than the upper part 521, is inserted into a space 62S having a V-shaped cross section, where the packaging material 62 is pushed open by the triangular plate 51. A medicine supply mechanism (not shown) provided above the hopper 52 supplies the medicine supplied according to the prescription to the packaging material 62 via the inside of the hopper 52 . The packaging material adhesion section 53 is a part that adheres the packaging material 62 to which the medicine has been supplied by heat welding or the like so as to divide the packaging material 62 into individual packages. In addition, the package forming section 5 may be provided with a perforation forming section (not shown) for forming perforations in the packaging material 62 bonded by the packaging material adhesion section 53 to facilitate cutting, for example. can.

-Packaging material supply department-
The packaging material supply section 3 is a section that sends the packaging material 62 to the packaging material conveyance section 4 and subsequent parts. A wound body 6 is arranged in the packaging material supply section 3 so as to be rotatable in the circumferential direction. As the rolled body 6 rotates, the packaging material 62 is drawn out from the rolled body 6 in the longitudinal direction.

As shown in FIG. 2, the packaging material supply section 3 includes a support shaft 31. As shown in FIG. The support shaft 31 is provided so as to protrude from a base (not shown). A part of the packaging material conveying section 4 (the tension adjustment mechanism 41 shown in FIG. 1) is also provided on this base. The support shaft 31 has a substantially cylindrical shape. The support shaft 31 has a cylindrical outer circumference. The support shaft 31 has a base end (left part in the figure) and a tip part (right part in the figure). A base end portion of the support shaft 31 is supported by a base. The support shaft 31 includes a main shaft portion 311 having a constant diameter, and a proximal shaft portion 312 located on the proximal side of the main shaft portion 311 and having a larger diameter 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.

The support shaft 31 is rotatably provided with respect to the base and supports the wound body 6 (core body 61). The support shaft 31 is driven and rotated by a drive unit such as a stepping motor (not shown) provided inside the base. The support shaft 31 is rotated in both the pulling direction and the pulling direction of the packaging material 62. In addition, the support shaft 31 is rotated intermittently in response to the supply of the packaging material 62 to the package forming section 5. The support shaft 31 is supported by a cantilever on the base, and the tip of the support shaft 31 is open. Therefore, as shown in FIG. 2, the core body 61 of the wound body 6 is arranged at an axially extending position on the open side of the support shaft 31, and wound in the axial direction from the distal end side to the proximal end side. By inserting the rotating body 6, the wound body 6 (only the core body 61 is shown) can be attached to the support shaft 31 as shown in FIG. The wound body 6 is attached to the support shaft 31 so as to be relatively unrotatable.

The support shaft 31 of this embodiment is formed to have a longer length in the axial direction than the wound body 6. Therefore, as shown in FIG. 4, a part of the support shaft 31 (mounting auxiliary portion 31B) protrudes from the core body 61 in the mounted state (mounted state on the support shaft main body 31A). However, the present invention is not limited to this, and the other end (described later) of the core body 61 and the tip of the support shaft 31 may coincide with each other in the attached state.

Further, a part of the distal end side of the support shaft 31 that protrudes from the core body 61 (the part where the guide protrusion 317 is formed) is separate from the support shaft main body 31A, which is the proximal part of the support shaft 31. The attachment aid 31B is attached to the support shaft body 31A. This mounting aid 31B can be used in combination with the wound body 6 of this embodiment. Attaching the attachment aid 31B to the support shaft main body 31A can be done, for example, by repurposing a fitting structure for attaching the tip cap of the support shaft of an existing drug packaging device (after removing the tip cap, attaching the attachment aid 31B to the support shaft body 31A). 31B) or by adhering to an existing support shaft (not limited to this, various mounting methods can be used). The support shaft body 31A has a cylindrical outer circumference. The mounting aid 31B serves as a mounting aid that is a part of the support shaft 31 when mounted on the support shaft body 31A. This configuration can be achieved with the support shaft 31 of the present embodiment by, for example, replacing the lid member provided at the tip of the short support shaft. The attachment auxiliary part 31B attached to the tip of the support shaft main body 31A allows the support shaft 31 of this embodiment to be formed without significantly modifying the support shaft included in an existing drug packaging device. Therefore, the combination of the rolled body 6 of this embodiment and the medicine packaging device 1 can be realized at low cost. However, for example, in a newly manufactured support shaft 31, the support shaft main body 31A and the mounting auxiliary portion 31B may be inseparably integrated, instead of having such a separate structure.

As shown in FIG. 2, a plurality of (four in this embodiment) hooking protrusions 313 as first protrusions are formed on the base end shaft portion 312 of the support shaft 31. The plurality of hook protrusions 313 to 313 are provided at a constant distance (spaced apart) in the circumferential direction (rotation direction). Each hook protrusion 313 protrudes radially outward from the outer circumferential surface of the base end portion of the support shaft 31 . Each hook protrusion 313 extends in the axial direction from the base end of the support shaft 31 to a predetermined distance in the distal direction. A rod-shaped packaging material breakage detection pin 314 protrudes in the radial direction from some of the plurality of hook projections 313 to 313 (in this embodiment, every other hook projection 313 in the circumferential direction). The tip of the packaging material breakage detection pin 314 is set to be located radially outside the outer peripheral surface of the core body 61 when the wound body 6 is attached to the support shaft 31. Furthermore, the hook protrusion 313 provided with the packaging material runout detection pin 314 is provided with a notch 315 that penetrates in the radial direction and extends in the axial direction.

The packaging material outage detection pin 314 is biased toward the distal end side (toward the right in the figure) 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 material breakage detection pin 314 is located on the side by the packaging materials 62 laminated in the radial direction on the outer periphery of the core body 61. By being pushed out, it is moved toward the proximal end in the axial direction against the spring bias. Note that in the core body 61 of the wound body 6, a notch that penetrates in the radial direction and extends in the axial direction is provided in a portion that corresponds to the packaging material breakage detection pin 314 when attached to the support shaft 31, similarly to the support shaft 31. A section 611 is provided. The notch 611 is arranged to coincide with the notch 315 of the support shaft 31 in the circumferential direction. Therefore, the core body 61 may be rotated in the circumferential direction with respect to the support shaft 31 by the operator in order to align the notch portion 611 (this point will be explained later). When the packaging material 62 is pulled out from the wound body 6 and disappears (that is, only the core body 61 is left), the packaging material 62 is no longer pushed out, and the spring-biased packaging material breakage detection pin 314 is activated. It moves toward the tip in the axial direction and enters the notch 611 (see FIG. 4). By detecting with a sensor or the like that the packaging material outage detection pin 314 enters the notch 611 in this manner, packaging material outage can be detected. By detecting that all the packaging material 62 has been unwound from the roll 6, the packaging material supply section 3 can be automatically stopped, for example.

A displacement regulating portion 316 protrudes from the outer circumferential surface of the support shaft 31 . At least one (not shown in the figure, but two in this embodiment) displacement regulating section 316 is provided. When a plurality of shift regulating portions 316 are provided as in this embodiment, the plurality of shift regulating portions 316 are provided at a constant distance (at intervals) in the circumferential direction. In this embodiment, the two displacement regulating portions 316 are positioned at equal intervals in the circumferential direction (that is, at intervals of 180 degrees). Furthermore, in this embodiment, the displacement regulating portion 316 is provided at the same position in the circumferential direction as one of the plurality of (four in this embodiment) hooking protrusions 313 to 313. The displacement regulating portion 316 is, for example, a spherical or hemispherical projection that is biased in the radially outward direction by a spring provided inside the support shaft 31 and partially protrudes from the outer circumferential surface of the support shaft 31 . The displacement regulating portion 316 is provided on the outer circumferential surface of the support shaft 31 so as to be retractable. This shift regulating portion 316 engages with a step portion 612 in the core body 61, which will be described later. Therefore, the core body 61 can be prevented from shifting in the axial direction with respect to the support shaft 31, and the wound body 6 can be reliably mounted on the support shaft 31.

At least one (four in this embodiment) guide protrusion 317 as a second protrusion is formed at the tip of the support shaft 31 (main shaft portion 311). When a plurality of guide protrusions 317 are formed as in this embodiment, the plurality of guide protrusions 317 to 317 are provided at a constant distance (at intervals) in the circumferential direction. Each guide protrusion 317 protrudes radially outward from the outer circumferential surface of the tip of the support shaft 31 . Each guide protrusion 317 protrudes between the plurality of hook protrusions 313 to 313 at a position in the circumferential direction. That is, when viewed in the axial direction, each hooking projection 313 and each guide projection 317 are positioned alternately. In this embodiment, each hooking protrusion 313 and each guide protrusion 317 are positioned alternately at equal intervals in the circumferential direction. Moreover, each guide protrusion 317 has a smaller amount of radially outward protrusion than each hook protrusion 313 with respect to the outer peripheral portion of the support shaft main body 31A.

As shown in FIG. 2, the guide protrusion 317 has a main body part 3171 having a constant width and a reduced part 3172, which is provided on the distal end side of the main body part 3171 and whose width narrows toward the distal end. Prepare as one. The reduced portion 3172 has a slope at the end in the width direction. In this embodiment, this slope is formed in a straight line when viewed in the radial direction, but is not limited to this, and may have other shapes such as a curved line. Moreover, although this slope is made into a symmetrical shape with respect to the axial direction in this embodiment, it may be an asymmetrical shape.

As the core body 61 is inserted into the support shaft 31, the inner peripheral surface 617 of the core body 61 contacts the guide protrusion 317, thereby aligning the core body 61 in the circumferential direction with respect to the support shaft 31. (The alignment of the core body 61 will be explained later). Figure 5 shows the situation. Incidentally, for ease of understanding, FIG. 5 shows the guide protrusion 317 (two-dot chain line) moving in the axial direction with respect to the core body 61, but in reality it is the opposite of what is shown in the figure. The core body 61 moves in the axial direction with respect to the guide projection 317. At this time, the support shaft 31 and the core body 61 are relatively rotated in the circumferential direction and aligned. The support shaft 31 may be stationary in the circumferential direction and the core body 61 may rotate in the circumferential direction with respect to the support shaft 31, or the core body 61 may be stationary in the circumferential direction and the core body 61 may rotate in the circumferential direction with respect to the support shaft 31. The support shaft 31 may also rotate in the circumferential direction. Both the support shaft 31 and the core body 61 may each rotate in the circumferential direction.

The guide protrusion 317 is provided at a different position from the hook protrusion 313 in the axial direction. Specifically, the guide protrusion 317 is provided at the tip of the support shaft 31, and the hook protrusion 313 is provided at the base end of the support shaft 31. By being provided at different positions in this way, it is possible to fit the hook recess 615 of the core body 61 into the hook protrusion 313 of the support shaft 31 with plenty of time after the circumferential alignment of the core body 61 is completed. can be combined. In particular, since the guide protrusion 317 of this embodiment is provided at the tip of the support shaft 31, the core body 61 is aligned at the beginning of the insertion operation, rather than at the end. Therefore, the operability of mounting the wound body 6 on the support shaft 31 is good. Also, on the core body 61 side, there is a mechanism for transmitting rotational force from the support shaft 31 (in this embodiment, the hook recess 615), and a mechanism for positioning in the circumferential direction (in this embodiment, the guide recess 616). can be distributed in the axial direction without being concentrated at one end of the core body 61 in the axial direction. Therefore, it is possible to prevent the strength of one end of the core body 61 in the axial direction from decreasing more greatly than the strength of the other end.

- Core of the wound body -
As shown in FIG. 2, the core body 61 of the wound body 6 has a cylindrical shape (cylindrical shape) or a tubular shape (cylindrical shape) with a circular cross section in the radial direction. The core body 61 has a cylindrical inner circumference. As shown in FIG. 1, a wrapping material 62 is wrapped around the outer peripheral surface of the core body 61. The outer diameter of the core body 61 is constant in the axial direction. Therefore, since no step appears on the outer peripheral surface of the core body 61, the packaging material 62 can be wound without creating creases. The core body 61 is attached to and detached from (attached to and removed from) the outer periphery of the support shaft 31 in the packaging material supply section 3 by being moved in the axial direction. The core body 61 is aligned in the circumferential direction of the support shaft 31 and attached to the outer periphery of the support shaft 31 . The core body 61 has one end and the other end. One end is a portion close to the support shaft 31 in FIG. 2, and the other end is a portion far from the support shaft 31 in FIG. The core body 61 is mounted on the support shaft 31 from one end side in a normal direction (mounting direction). During installation, the core body 61 is moved in the axial direction from the distal end of the support shaft 31 toward the proximal end. The core body 61 includes a notch 611 at its base end in the direction in which it is attached to the support shaft 31 (normal attachment direction). The notch 611 is provided at a position corresponding to the packaging material breakage 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 61 in the radial direction and has a space opened at the base end of the core 61 . In this space, the packaging material outage detection pin 314 is movable in the axial direction of the support shaft 31. This movement is performed after the packaging material 62 is pulled out from the rolled body 6 and disappears (FIG. 4 shows the state after the movement). Incidentally, this notch 611 can also be used as a visual or tactile clue when the operator identifies the direction of the rolled body 6.

As shown in FIG. 2, a stepped portion 612 is formed on the inner peripheral portion of the core body 61 on the tip side. A plurality of step portions 612 (four locations in this embodiment) are provided intermittently in the circumferential direction. A displacement regulating portion 316 protruding from the support shaft 31 engages with this stepped portion 612 . Therefore, the core body 61 can be prevented from shifting in the axial direction with respect to the support shaft 31, and the wound body 6 can be reliably mounted on the support shaft 31. On the other hand, since the displacement regulating portion 316 is biased by a spring, when removing the core body 61 from the support shaft 31, for example, if the core body 61 is moved in the axial direction with a force that overcomes the biasing force of the spring, the core body The body 61 moves relative to the support shaft 31. Therefore, when removing the core body 61 from the support shaft 31, the work can be performed without any particular problem.

The core body 61 has a plurality of magnet holding parts 613 to 613 that hold permanent magnets in combinations corresponding to magnetic detection parts such as magnetic sensors that the packaging material supply part 3 has for identifying the rolled body 6. Be prepared. Permanent magnets are arranged in a selected predetermined number of magnet holders 613 to 613 among the plurality of magnet holders 613 (the drawing shows the magnet holder 613 without any permanent magnets arranged). . Specifically, "identifying the rolled body 6" means identifying the material of the packaging material 62. In the plurality of magnet holding parts 613 to 613, a magnetic detection part detects the number of magnet holding parts 613 in which permanent magnets are arranged, the polarity of the permanent magnets, the strength of magnetic force, etc., and performs identification. Note that the drug packaging is configured so that the rolled body 6 is identified by means other than magnetic, such as electromagnetic detection using an RFID tag that can be wirelessly identified, such as an IC chip, or optical detection using a two-dimensional code. This magnet holding section 613 is not necessary in a device or a drug packaging device whose magnetic detection section has been removed or disabled by modification.

The core body 61 includes a hooking recess 615 as a first recess, a guide recess 616 as a second recess, and an inner peripheral surface portion 617 on the inner periphery. A plurality of sets of hook recesses 615, guide recesses 616, and inner circumferential surface portions 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 to 617 are provided at equal intervals in the circumferential direction. However, it is also possible to provide only one set or to provide multiple sets at unequal intervals. Further, these portions 615 to 617 are provided asymmetrically in the axial direction, as shown in FIGS. 2 and 3.

The hook recess 615 is provided on the inner periphery of the core body 61 at one end side. The hooking recess 615 transmits rotational force in the circumferential direction between the hooking recess 615 and the supporting shaft 31 by fitting into the hooking protrusion 313 provided on the supporting shaft 31 when the hooking recess 615 is attached to the supporting shaft 31 . That is, when the core body 61 is attached to the outer periphery of the support shaft body 31A, the hook protrusion 313 and the hook recess 615 fit together, so that the support shaft body 31A and the core body 61 are connected to the support shaft body 31A. It is possible to rotate integrally around the central axis of the outer periphery. The number of hooking recesses 615 matches the number of hooking protrusions 313 on the support shaft 31. Further, the number of pairs of guide recesses 616 and inner circumferential surface portions 617 corresponds to the number of guide protrusions 317 on support shaft 31 . However, the number of hooking recesses 615 can be made larger than the number of hooking protrusions 313 on the support shaft 31. Further, the number of sets consisting of the guide recess 616 and the inner circumferential surface portion 617 can be made larger than the number of guide protrusions 317 on the support shaft 31.

The guide recess 616 is provided on the inner periphery of the core body 61 so as to extend from one end in the axial direction toward the other end in the axial direction. The guide recess 616 has an inner diameter larger than the outer diameter of the support shaft 31 . Compared to the hooking recess 615, the guide recess 616 is radially outward relative to the inner circumferential portion (more specifically, the inner circumferential surface, more specifically, the inner circumferential surface of the inner circumferential surface portion 617 or the thick wall portion 619) of the core body 61. The amount of dent in the direction is small. Therefore, it is possible to prevent the strength of the core body 61 from decreasing due to the dent. The guide recess 616 is formed at one end of the core 61 over the entire circumference of the core 61 in the circumferential direction (portion 6162a shown in FIG. 3). Therefore, when the core body 61 is extrapolated to the mounting auxiliary part 31B, there is no need to align the mounting auxiliary part 31B and the core body 61 around the central axis line, so that the work can be facilitated. The guide recess 616 positions the support shaft 31 in the circumferential direction by engaging with the guide protrusion 317 when the core body 61 is attached to the support shaft 31 . That is, when the core body 61 is attached to the outer periphery of the support shaft main body 31A, the guide protrusion 317 and the guide recess 616 engage with each other, so that the guide protrusion 317 and the guide recess 616 provide support. It is aligned in the circumferential direction around the central axis of the outer peripheral portion of the shaft body 31A. This guide recess 616 is located on the other end side, has a constant width dimension (circumferential dimension) and extends in the axial direction, and is continuous with the one end side of the positioning section 6161 in the axial direction. It has a guide portion 6162 that extends and whose width dimension (circumferential dimension) increases toward one end. The width dimension of the positioning portion 6161 is approximately the same as the width dimension of the guide protrusion 317. Specifically, the width is larger (slightly larger) than the width of the guide protrusion 317 to the extent that movement of the core body 61 in the axial direction with respect to the guide protrusion 317 is allowed.

In the portion of the guide portion 6162 where the inner circumferential surface portion 617 overlaps in the axial direction, the circumferential dimension decreases from one end side to the other end side, so the core body 61 is It is moved in the circumferential direction (see FIG. 5; however, in FIG. 5, the movement and immobility of the core body 61 and the guide protrusion 317 are shown in reverse from the actual situation). Then, the hooking recess 615 of the core body 61 matches the hooking protrusion 313 of the support shaft 31 . In this way, the core body 61 rotates with respect to the support shaft 31 and is aligned in the circumferential direction.

Note that for a portion 6162a (see FIG. 3) of the guide portion 6162 where the inner circumferential surface portion 617 does not overlap in the axial direction, the effect of moving the core body 61 in the circumferential direction due to contact with the guide protrusion 317 is not effective. Not done. This portion 6162a serves to facilitate 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 in the axial direction. In this embodiment, the entire circumference in the circumferential direction is exposed. That is, the inner diameter of the one axial end of the core body 61 has a loose relationship with the outer diameter of the support shaft 31 due to the exposed guide portion 6162. Therefore, it is easier to insert the wound body 6 (core body 61) into the support shaft 31 compared to a configuration in which there is no dimensional margin. By the way, the rolled body 6 with the packaging material 62 wound around the core body 61 is heavy (especially a new rolled body 6 is especially heavy because the packaging material 62 has not been consumed at all), so it is difficult to insert it. The ease is a great advantage for the user of the drug packaging device 1. Incidentally, this effect is also the effect of the thin wall portion 618, which will be described later.

Here, a portion 6162a of the guide portion 6162 where the inner circumferential surface portion 617 does not overlap in the axial direction can also be said to be a “free region” that allows rotation of the core body 61 without restriction. In addition, the positioning portion 6161 is arranged such that rotation of the core body 61 is substantially impossible (specifically, the guide recess 616 of the core body 61 is shifted in the axial direction with respect to the guide protrusion 317 of the support shaft 31). It can also be said to be a "restricted area" where only a certain amount of circumferential play exists. In addition, a portion 6162b of the guide portion 6162 where the inner circumferential surface portion 617 overlaps in the axial direction is a “transition region” where the rotatable range of the core body 61 is smaller at one end in the axial direction than at the other end. You can say that. The guide recess 616 extends from one end in the axial direction toward the other end, and is continuous in the order of a free region, a transition region, and a restricted region.

The inner peripheral surface portion 617 is a 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 from the other end in the axial direction toward the one end in the axial direction, and does not reach the edge of the core body 61 on the one end in the axial direction, but extends toward the tip. is located between the axial center and the edge on one axial end side. In this embodiment, the tip is formed at a position adjacent to the other axial end of the hooking recess 615 . The tip portion of the inner circumferential surface portion 617 has a shape opposite to that of the guide portion 6162, and the circumferential dimension thereof decreases from the other end toward the one end. The shape of the inner circumferential surface portion 617 is asymmetrical in the axial direction.

The surface of the inner circumferential surface portion 617 is a curved surface that curves at a constant curvature in the circumferential direction. The circumferential curvature of the surface of the inner circumferential surface portion 617 is the same (substantially the same) as the circumferential curvature of the outer circumferential surface of the support shaft 31 . Since the surface of the inner circumferential surface portion 617 is a curved surface with a spread, the inner circumferential surface portion 617 comes into surface contact with the outer circumferential surface of the support shaft 31 when the core body 61 is attached. For example, in a structure in which a plurality of protrusions extending in the axial direction are formed on the inner circumferential surface of the core, since they make line contact with the outer circumferential surface of the support shaft, the support There is a possibility that deformation (distortion) may occur in the main body of the core, which is in a floating state with respect to the shaft. On the other hand, in this embodiment, since the surface of the inner circumferential surface portion 617 comes into surface contact with the outer circumferential surface of the support shaft 31, the possibility that the above-mentioned deformation (distortion) will occur in the core body 61 can be reduced.

Since the inner peripheral surface portion 617 is thick and the guide recess 616 is thin, a step is formed between the inner peripheral surface portion 617 and the guide recess 616. That is, 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 direction) edge of the guide portion 6162 of the guide recess 616 (see FIGS. 4 and 5).

As described above, when the core body 61 including the hooking recess 615, the guide recess 616, and the inner peripheral surface part 617 is to be attached to the support shaft 31 from one end side, first, the core body 61 is attached to the guide protrusion 317 of the support shaft 31. This is where the guiding portion 6162 of the body 61 is located. When the core body 61 is further moved in the axial direction, the positioning portion 6161 of the core body 61 is positioned relative to the guide protrusion 317 (see the position change indicated by the arrow in FIG. 5).

The positioning part 6161 is also a guide part that guides the guide protrusion 317. The positioning portion 6161 serving as a guide portion is provided at the other end of the core body 61 and is connected to the guide portion 6162, and is connected to the hook protrusion 313 when the core body 61 is attached to the outer periphery of the support shaft body 31A. The guide protrusion 317 is guided so that the hooking recess 615 remains aligned in the circumferential direction around the central axis of the outer peripheral portion of the support shaft body 31A. According to this, when attaching the core body 61 to the support shaft body 31A, there is no need to intentionally maintain a state in which the support shaft body 31A and the core body 61 are aligned around the central axis. This work can be made easier.

Further, the width dimension (circumferential dimension) of the guide portion 6162 decreases as it progresses from one end of the core body 61 toward the other end, and the core body 61 is attached to the outer periphery of the support shaft body 31A. At this time, the guide protrusion 317 is guided so that the hook protrusion 313 and the hook recess 615 are aligned in the circumferential direction around the central axis of the outer peripheral portion of the support shaft body 31A. According to this, when attaching the core body 61 to the support shaft body 31A, there is no need to intentionally align the support shaft body 31A and the core body 61 around the central axis line, making the work easier. can.

Here, when the guide protrusion 317 is located at the circumferential end of the guide part 6162, the edge of the guide part 6162, that is, the core side slope 6171 comes into contact with the guide protrusion 317. Thereby, the positioning portion 6161 of the core body 61 is guided to match the guide protrusion 317. Then, when the core body 61 is further moved in the axial direction, a part of the hook protrusion 313 and a part of the hook recess 615 are fitted while the guide protrusion 317 and the positioning part 6161 of the core body 61 are engaged. . When the core body 61 is further moved in the axial direction, the positioning portion 6161 of the core body 61 is disengaged from the guide protrusion 317, and the hook protrusion 313 and the hook recess 615 are completely fitted together, finally as shown in FIG. state.

The edge of the guide portion 6162 (core-side slope 6171) may come into contact with the slope of the reduced portion 3172 of the guide projection 317 (see FIG. 5). Here, the inclinations in the axial direction of the core-side slope 6171, which is the edge of the guide portion 6162, and the slope at the reduced portion 3172 of the guide projection 317 are approximately the same. Therefore, the abutment can be made smoothly.

As described above, according to the core body 61 of this embodiment, the guide recess 616 facilitates attachment to the support shaft 31, and the inner circumferential surface portion 617 ensures the strength of the core body.

Further, the core body 61 includes a thin portion 618 and a thick portion 619. The thin portion 618 is provided on the inner periphery of one end in the axial direction. Further, the thin wall portion 618 fits into the base end shaft portion 312 of the support shaft 31 when the core body 61 is attached to the support shaft 31 . The thick portion 619 is provided on the inner periphery of the other end in the axial direction, and fits into the main shaft portion 311 of the support shaft 31 when attached to the support shaft 31 . The thick portion 619 is thicker than the thin portion 618. The thin wall portion 618 corresponds to the aforementioned guide recess 616, and the thick wall portion 619 corresponds to the aforementioned inner circumferential surface portion 617. Although the thin wall portion 618 is formed for a different purpose from the guide recess 616 described above, the range in which it is formed on the inner periphery of the core body 61 is the same as the guide recess 616 described above. Note that the thin portion 618 and the guide recess 616 can be formed in different ranges. Although the thick portion 619 is formed for a different purpose from the inner circumferential surface portion 617 described above, the range in which the thick portion 619 is formed in the core body 61 is the same as that of the inner circumferential surface portion 617 described above. Note that the thick portion 619 and the inner circumferential surface portion 617 can be formed in different ranges.

Here, a phenomenon called "winding tightness" may occur due to the stress (force to shrink in the longitudinal direction) remaining in the packaging material after winding and the ambient temperature or humidity during the manufacture of the wound body. This "tightening" applies compressive force in the radial direction to the core. Due to this compressive force, the thin-walled portion may be deformed radially inward, resulting in the outer periphery of the core having an irregular shape. In this case, the packaging material may be delivered unevenly, and the packaging of the drug may become unstable.

According to the core body 61 of this embodiment, the thin part 618 fits into the proximal shaft part 312 of the support shaft 31 , and the thick part 619 fits into the main shaft part 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 wall portion 618 of the core body 61 are made to be the same size to the extent that insertion is possible. Further, the outer diameter of the main shaft portion 311 of the support shaft 31 and the inner diameter of the thick portion 619 of the core body 61 are the same to the extent that insertion is possible. By fitting the core body 61 to the support shaft 31, the gap between the support shaft 31 and the core body can be suppressed. Therefore, it is possible to eliminate a gap that would allow the core body 61 to be deformed to the extent that it would affect the delivery of the packaging material 62. Therefore, the core body 61, which is physically supported by the support shaft 31, can counteract the compressive force caused by the tightly wound wrapping material 62. In particular, in the region 619a of the core body 61 on the other end side of the axial center, the thick portion 619 occupies a larger proportion in the circumferential direction than the thin portion 618. Therefore, the region 619a greatly contributes to resisting the compressive force of tight winding.

-Reusing used cores-
The core body 61 is made of, for example, hard resin. Therefore, by reusing the core body 61 after the packaging material 62 is used up, it can be used repeatedly many times. This can contribute to saving oil resources, for example. Reuse is performed by wrapping a new packaging material 62 around the used core body 61 collected from the user of the drug packaging device 1. By winding a new packaging material 62 around the reused core body 61, a new rolled body 6 is manufactured. In addition, in order to smoothly collect the core body 61 of the rolled body 6 handed over to the user, the core body 61 is lent to the user, and the user can return the core body 61. can encourage the collection of

The new packaging material 62 is wound around the used core body 61, for example, by wrapping the new packaging material 62 around a separate core body (such as a paper tube) having an inner diameter larger than the outer diameter of the core body 61. A method may also be used in which a wrapping material roll (replacement roll) manufactured in advance is attached to the used core body 61 by winding. When this method is adopted, by interposing a spacer such as a rubber ring between the used core 61 and the separate core, the outer diameter of the core 61 and the inner diameter of the separate core can be adjusted. You can also adjust the difference.

The new winding body 6 can be manufactured by the supplier of the winding body 6, or the supplier of the winding body 6 may instruct the user to perform the work related to the manufacturing. You can also do it. In the latter case, the used core body 61 will not be collected but will remain in the hands of the user. The instructions from the supplier of the roll 6 to the user may be explicit or implicit. The latter implied instruction also includes the act of simply transferring a replacement roll to the user.

-Possibility to change form-
Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various changes can be made without departing from the gist of the present invention.

1 Drug packaging device 2 Packaging section 3 Packaging material supply section 31 Support shaft 31A Support shaft main body 31B Mounting aid part (fitting aid)
311 Main shaft portion 312 Base end shaft portion 313 Hook projection, first projection portion 317 Guide projection, second projection portion 4 Packaging material conveyance portion 5 Packaging body forming portion 6 Wound body 61 Core body 615 Hook recess portion, first recess portion 616 Guide recess, second recess 6161 Positioning part, guide part 6162 Guidance part 617 Inner peripheral surface part 618 Thin part 619 Thick part 62 Packaging material

Claims (1)

A core body,
formed into a cylindrical shape,
It is possible to wrap a long sheet around the outer circumference,
It has a cylindrical inner periphery, one end and the other end,
In the inner peripheral part,
a first recess provided at the one end and recessed radially outward;
a second recess provided from the position of the one end to the position of the other end, recessed radially outward, and having a smaller amount of recess radially outward relative to the inner circumference than the first recess; , is formed,
It can be attached to the outer periphery of a rotatably provided support shaft from the one end side,
When attached to the outer periphery of the support shaft, the first recess fits into a first protrusion provided at the base end of the support shaft, so that it can rotate integrally with the support shaft. Then,
When attached to the outer periphery of the support shaft, the second recess engages with a second protrusion provided at the tip of the support shaft, thereby connecting the first protrusion and the first protrusion. 1 recess is aligned in the circumferential direction of the support shaft, using a core body,
A method for reusing a core, the method comprising winding a new long sheet around the core after the long sheet previously wound around the core is used up.