JP7323926B2 - winding body - Google Patents

Description

The present invention provides a combination of a wound body in which a wrapping material that is a strip-shaped sheet is wound, and a drug packaging device that uses the wrapping material to package a drug, The present invention relates to a core that constitutes a rotating body.

There is a drug packaging device that packages a drug using a wrapping material that is a strip-shaped sheet. An example of a support device for a packaging material included in such a medicine packaging device is described in Patent Document 1. In the configuration described in Patent Document 1, a support shaft (paper feeding drum) protrudes from a base (in the description of Patent Document 1, the "machine"; the same is true for parentheses below), and the support shaft can be rotated by the base. supported by A core body (core tube) is attached to the outer circumference of the support shaft. A wrapping material (wrapping paper) is wound around the outer periphery of the core to form a roll-shaped wound body. The drug can be packaged in the packaging material that is sequentially pulled out from the roll.

Japanese Utility Model Publication No. 56-44757

Here, the conventional core body has a thin axial end portion so as to prevent the core body from coming off from the support shaft of the drug packaging device. However, in manufacturing the wound body, a phenomenon called "tight winding" may occur depending on the stress remaining in the packaging material after winding (a force that shrinks in the longitudinal direction) and the ambient temperature or humidity. Due to this "tight winding", a compressive force is applied to the core body in the radial direction. Due to this compressive force, the thin portion is deformed radially inward, and the outer periphery of the core may become distorted. As a result, the delivery of the packaging material becomes uneven, and the packaging of the medicine becomes unstable.

Accordingly, an object of the present invention is to provide a combination of a wound body and a medicine packaging device, the wound body, and a core constituting the wound body, which can stably pack medicines. is the subject.

The present invention includes a winding body configured by winding a long sheet-like packaging material, and a drug package using the packaging material attached to the winding body and unwound from the winding body. A combination of a wound body and a medicine packaging device comprising: The support shaft includes a main shaft portion having a constant diameter, a base end shaft portion positioned closer to the base end than the main shaft portion and having a larger diameter than the main shaft portion, wherein the wound body comprises a core formed in a cylindrical shape and mounted on the outer periphery of the support shaft; and the wrapping material wound around the outer periphery of the core, wherein the core is , a thin-walled portion provided on the inner periphery at one end in the axial direction and fitted to the base end shaft portion when mounted on the support shaft; A combination of a wound body and a medicine packaging device, or the wound body used therein, comprising a thick-walled portion having a wall thickness larger than that of the thin-walled portion and fitted to the main shaft portion in an attached state,
Alternatively, it is composed of the core used for this.

According to these, since the thin portion is fitted to the base end shaft portion and the thick portion is fitted to the main shaft portion, the gap between the support shaft and the core can be suppressed, so the compressive force of tightening the winding can be reduced. can compete.

INDUSTRIAL APPLICABILITY The present invention can stably package drugs.

1 is a perspective view showing a schematic configuration of a packaging unit in a medicine packaging device according to one embodiment of the present invention; FIG. It is a perspective view which shows the core body in a support shaft and a winding body among the said packaging parts. It is a half section perspective view along the axis of the core. It is a perspective view which shows the support shaft and the said core body made into the mounting state among the said packaging parts. It is a figure for demonstrating a mode that the circumferential direction alignment of the said core is performed with respect to the said support shaft.

Next, an embodiment of the combination of the wound body 6 and the drug packaging device 1 will be described for the present invention. In the following description, "proximal side" corresponds to the left side in FIG. 2, and "distal side" corresponds to the right side in FIG. Also, the “axial direction” in the following description means the axial direction of the support shaft 31 .

－Overview of the packaging department－
FIG. 1 schematically shows a packaging section 2, which is a portion for packaging medicines in a medicine packaging apparatus 1. As shown in FIG. A drug (not shown) is, for example, a tablet or a powder. The packaging material 62 used in the drug 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 in the figure). The packaging material 62 is wound around the outer circumference of the core body 61 to form a roll-shaped wound body (packaging material roll) 6 . That is, the wound body 6 is configured by winding a long sheet-like packaging material 62 . In the wound body 6 , the packaging material 62 is wound around the outer periphery of the core body 61 while being half-folded at the center in the width direction (transverse direction). The packaging material 62 is unwound from the wound body 6 . The medicine packaging device 1 uses the packaging material 62 unwound from the wound body 6 to package the medicine. The packaging unit 2 in the medicine packaging device 1 is arranged in the order of the packaging material supply unit 3 , the packaging material conveying unit 4 , and the package forming unit 5 from the upstream side to the downstream side in the conveying direction of the packaging material 62 . These are described below. For convenience, the packaging material supply unit 3 will be described later.

－Packaging Material Conveyor－
The packaging material conveying section 4 conveys the packaging material 62 in the longitudinal direction, and supplies it to the packaging body forming section 5 on the downstream side in the conveying direction. The packaging material conveying section 4 mainly includes a tension adjusting mechanism 41 and a folding bar 42 . The tension adjusting mechanism 41 is a mechanism that adjusts the tension by folding the packaging material 62 between a plurality of rollers 411 to 413 with varying inter-axle distances. The tension adjusting mechanism 41 of this embodiment is composed of, for example, two fixed rollers 411 and 412 whose axial positions are immovable, and one dancer roller 413 which moves so that its axial position is curved with respect to the base. It is The folding bar 42 changes the conveying direction of the packaging material 62 conveyed upward from the tension adjusting mechanism 41 obliquely downward. The packaging material conveying unit 4 can be provided with a printing unit 43 that prints drug prescription information and the like on the surface of the packaging material 62, for example.

- Package forming section -
The package forming part 5 is a part that supplies the medicine to the packaging material 62 according to the prescription, and packages 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 bonding section 53 . The triangular plate 51 is positioned 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 folded in half in the width direction to form a V-shaped cross section when viewed in the longitudinal direction. It is the part that gives shape. The hopper 52 has a lower portion 522 formed with a smaller cross-sectional area than the upper portion 521 and partially 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 part 53 is a part where the packaging material 62 is heat-sealed or the like so as to separate the packaging material 62 supplied with the medicine one by one. In addition to this, the package forming unit 5 may be provided with a perforation forming unit (not shown) for forming perforations for facilitating cutting of the packaging material 62 bonded by the packaging material bonding unit 53, for example. can.

－Packaging supply part－
The packaging material supply unit 3 is a part that feeds the packaging material 62 to the packaging material conveying unit 4 and beyond. A wound body 6 is arranged in the packaging material supplying section 3 so as to be rotatable in the circumferential direction. As the wound body 6 rotates, the packaging material 62 is pulled out from the wound body 6 in the longitudinal direction.

As shown in FIG. 2 , the packaging material supply section 3 has 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 conveying unit 4 (the tension adjusting 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 periphery. The support shaft 31 has a base end (left portion in the drawing) and a tip end (right portion in the drawing). 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 base end shaft portion 312 positioned closer to the proximal side than 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.

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 rotated by being driven by a drive unit such as a stepping motor (not shown) provided inside the base. The support shaft 31 is rotated in both directions of pulling out and pulling in the packaging material 62 . Further, the support shaft 31 is intermittently rotated in response to the supply of the packaging material 62 to the package forming unit 5 . The support shaft 31 is cantilevered with respect to the base, and the tip of the support shaft 31 is open. For this reason, as shown in FIG. 2, the core 61 of the wound body 6 is arranged at an axially extending position on the open side of the support shaft 31, and is axially wound from the distal end side to the proximal end side. By inserting the winding body 6, the winding 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 not to be relatively rotatable.

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

A portion of the support shaft 31 protruding from the core 61 on the distal end side (the portion where the guide projection 317 is formed) is separate from the support shaft main body 31A, which is the base end portion of the support shaft 31. A mounting aid 31B is mounted on the support shaft main body 31A. This mounting aid 31B can be used in combination with the wound body 6 of this embodiment. The attachment of the attachment aid 31B to the support shaft main body 31A is performed, for example, by diversion of the fitting structure for attaching the tip lid of the support shaft provided in the existing drug packaging device (the tip lid is removed and the attachment aid is attached). 31B) or bonding 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 aid 31B serves as a mounting aid that is a part of the support shaft 31 when mounted on the support shaft main body 31A. This configuration can be made into the support shaft 31 of the present embodiment by replacing the cover member provided at the tip of the short support shaft, for example. The support shaft 31 of the present embodiment can be formed by the mounting auxiliary portion 31B attached to the tip of the support shaft main body 31A without significantly modifying the support shaft provided in the existing drug packaging device. Therefore, the combination of the wound body 6 of the present embodiment and the drug packaging device 1 can be realized at low cost. However, for a newly manufactured support shaft 31, for example, the support shaft main body 31A and the mounting auxiliary portion 31B may be integrally formed instead of such a separate structure.

As shown in FIG. 2, a base end shaft portion 312 of the support shaft 31 is formed with a plurality of (four in this embodiment) hooking protrusions 313 as first protrusions. The plurality of hooking projections 313 to 313 are provided at regular intervals (at intervals) in the circumferential direction (rotational direction). Each hooking projection 313 protrudes radially outward from the outer peripheral surface of the base end portion of the support shaft 31 . Each hooking projection 313 axially extends from the proximal end of the support shaft 31 by a predetermined distance in the distal direction. A rod-shaped packaging material break detection pin 314 protrudes radially from some of the plurality of hooking protrusions 313 to 313 (in this embodiment, every other hooking protrusion 313 in the circumferential direction). The tip of the packaging material depletion detection pin 314 is set so as to be located outside the outer peripheral surface of the core body 61 when the wound body 6 is attached to the support shaft 31 . A notch 315 penetrating in the radial direction and extending in the axial direction is provided in the hooking projection 313 provided with the packaging material depletion detection pin 314 .

The packaging material depletion detection pin 314 is urged toward the distal end side (rightward in the drawing) in the axial direction of the support shaft 31 by the urging force of a spring (not shown) provided inside the support shaft 31 . When the wound body 6 around which the packaging material 62 is wound is attached to the support shaft 31 , the packaging material break detection pin 314 is detected by the packaging material 62 radially laminated on the outer periphery of the core 61 . By being pushed forward, it is moved axially to the base end side against the bias of the spring. In addition, in the core body 61 of the wound body 6, a notch penetrating in the radial direction and extending in the axial direction similarly to the support shaft 31 is formed in a portion of the core body 61 that coincides with the packaging material cut-out detection pin 314 when attached to the support shaft 31. A portion 611 is provided. The notch 611 is arranged so as to coincide with the notch 315 of the support shaft 31 in the circumferential direction. For this reason, 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 611 (this point will be described later). When the packaging material 62 is pulled out from the wound body 6 and disappears (that is, when only the core body 61 is left), the packaging material 62 is no longer pushed out, so the spring-biased packaging material break detection pin 314 is released. It moves to the tip side in the axial direction and enters the notch 611 (see FIG. 4). By detecting that the packaging material depletion detection pin 314 has entered the notch 611 with a sensor or the like, the packaging material depletion can be detected. By detecting that the packaging material 62 has been completely unwound from the wound body 6, for example, the packaging material supplying section 3 can be automatically stopped.

A deviation restricting portion 316 protrudes from the outer peripheral surface of the support shaft 31 . At least one deviation restricting portion 316 (not shown in the drawing, but two in this embodiment) is provided. When a plurality of deviation restricting portions 316 are provided as in the present embodiment, the plurality of deviation restricting portions 316 are provided at a constant distance (at intervals) in the circumferential direction. In this embodiment, the two deviation restricting portions 316 are positioned at equal intervals in the circumferential direction (that is, at intervals of 180 degrees). Further, in this embodiment, the deviation restricting portion 316 is provided at the same circumferential position as one of the plurality (four in this embodiment) of the hooking protrusions 313 to 313 . The deviation restricting portion 316 is, for example, a spherical or hemispherical projection that is biased radially outward by a spring provided inside the support shaft 31 and partially protrudes from the outer peripheral surface of the support shaft 31 . The deviation restricting portion 316 is provided on the outer peripheral surface of the support shaft 31 so as to be retractable. The deviation restricting portion 316 engages with a stepped portion 612 of the core body 61, which will be described later. Therefore, it is possible to prevent the core body 61 from axially shifting with respect to the support shaft 31 , and the wound body 6 can be securely attached to the support shaft 31 .

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

As shown in FIG. 2, the guide protrusion 317 includes a main body portion 3171 having a constant width and a reduced portion 3172 provided on the distal end side of the main body portion 3171 and having a reduced width toward the distal end. Prepare for unity. The reduced portion 3172 has slopes at the ends in the width direction. Although this slope is formed in a straight line when viewed in the radial direction in this embodiment, it is not limited to this, and may be formed in another shape such as a curved line. Moreover, although this slope is symmetrical with respect to the axial direction in this embodiment, it may be asymmetrical.

As the core body 61 is inserted into the support shaft 31 , the inner peripheral surface portion 617 of the core body 61 abuts against the guide protrusion 317 , thereby aligning the core body 61 with the support shaft 31 in the circumferential direction. (Alignment of the core 61 will be explained later). FIG. 5 shows the situation. Incidentally, FIG. 5 shows that the guide projection 317 (chain line) moves in the axial direction with respect to the core body 61 in order to facilitate understanding. The core 61 moves in the axial direction with respect to the guide protrusion 317 . At this time, the support shaft 31 and the core body 61 are relatively rotated in the circumferential direction and positioned. The support shaft 31 may be immovable in the circumferential direction and the core 61 may rotate in the circumferential direction with respect to the support shaft 31, or the core 61 may be immovable in the circumferential direction and the core 61 may rotate The support shaft 31 may rotate in the circumferential direction. Both the support shaft 31 and the core 61 may rotate in the circumferential direction.

The guide protrusion 317 is provided at a different position in the axial direction from the hooking protrusion 313 . Specifically, the guide protrusion 317 is provided at the distal end of the support shaft 31 , and the hooking protrusion 313 is provided at the proximal end of the support shaft 31 . Due to the different positions, the hooking recess 615 of the core 61 is fitted to the hooking projection 313 of the support shaft 31 with enough time after the alignment of the core 61 in the circumferential direction is completed. can be combined. In particular, since the guide projection 317 of the present embodiment is provided at the tip of the support shaft 31, alignment of the core body 61 is performed not at the end but at the beginning of the insertion work. Therefore, the operability of attaching the wound body 6 to the support shaft 31 is good. Also, on the core body 61 side, a mechanism for transmitting rotational force from the support shaft 31 (hook recess 615 in this embodiment) and a mechanism for circumferential alignment (guide recess 616 in this embodiment) are provided. can be dispersively provided in the axial direction without being concentrated at one end portion in the axial direction of the core body 61 . Therefore, it is possible to prevent the strength of one end of the core body 61 in the axial direction from decreasing more than the strength of the other end.

- Core body of 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) having a circular cross section in the radial direction. The core 61 has a cylindrical inner circumference. As shown in FIG. 1, the wrapping material 62 is wound around the outer peripheral surface of the core 61 . The outer diameter dimension of the core body 61 is constant in the axial direction. As a result, no steps appear on the outer peripheral surface of the core body 61, so that the packaging material 62 can be wound without creases. The core body 61 is attached and detached (attached and detached) by moving in the axial direction with respect to the outer periphery of the support shaft 31 in the packaging material supply section 3 . 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 61 has one end and the other end. One end is a portion near 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 regular direction (mounting direction). During mounting, the core body 61 is axially moved from the distal end portion of the support shaft 31 toward the proximal end portion. The core body 61 has a notch 611 at its proximal end in the direction of attachment to the support shaft 31 (normal attachment direction). The notch portion 611 is provided at a position corresponding to a packaging material cutoff detection pin 314 protruding radially outward from the support shaft 31 when the core body 61 is attached to the support shaft 31 . The notch 611 radially penetrates through the core 61 and has a space open at the proximal end of the core 61 . In this space, the packaging material depletion detection pin 314 can move in the axial direction of the support shaft 31 . This movement is performed after the wrapping material 62 is pulled out from the wound body 6 (FIG. 4 shows the state after movement). Incidentally, the notch 611 can also be used as a visual or tactile clue when the operator identifies the direction of the wound body 6 .

As shown in FIG. 2, a stepped portion 612 is formed on the tip side of the inner peripheral portion of the core 61 . A plurality of (four in this embodiment) stepped portions 612 are intermittently provided in the circumferential direction. A deviation restricting portion 316 projecting from the support shaft 31 is engaged with the stepped portion 612 . Therefore, it is possible to prevent the core body 61 from axially shifting with respect to the support shaft 31 , and the wound body 6 can be securely attached to the support shaft 31 . On the other hand, since the deviation restricting portion 316 is biased by a spring, for example, when the core body 61 is pulled out from the support shaft 31, if the core body 61 is moved in the axial direction by a force that overcomes the biasing force of the spring, the core can be moved. Body 61 moves relative to support shaft 31 . Therefore, when removing the core body 61 from the support shaft 31, the work can be performed without any particular trouble.

The core body 61 has a plurality of magnet holders 613 to 613 that hold a combination of permanent magnets corresponding to a magnetic detector such as a magnetic sensor provided in the packaging material supply section 3 for identifying the wound body 6. Prepare. Permanent magnets are arranged in a predetermined number of magnet holding portions 613 to 613 selected from among the plurality of magnet holding portions 613 (the drawing shows the magnet holding portion 613 in a state where no permanent magnets are arranged). . The “identification of the wound body 6 ” specifically means identification of the material of the packaging material 62 . Among the plurality of magnet holders 613 to 613, the magnetic detector detects the number of magnet holders 613 in which permanent magnets are arranged, the polarity of the permanent magnets, the strength of the magnetic force, and the like, and performs identification. Note that the wound body 6 can be identified 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 two-dimensional code. This magnet holder 613 is not necessary in a device or a drug packaging device in which the magnetic detector has been removed or disabled by modification.

The core body 61 has a hook 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 peripheral 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 regular intervals in the circumferential direction. However, it is also possible to provide only one set, or to provide a plurality of sets at uneven intervals. Also, these portions 615 to 617 are provided asymmetrically in the axial direction, as shown in FIGS.

The hook recess 615 is provided on the inner periphery of the core 61 on the one end side. The hooking recesses 615 are engaged with the hooking protrusions 313 provided on the support shaft 31 when attached to the support shaft 31 , thereby transmitting rotational force to the support shaft 31 in the circumferential direction. That is, when the core body 61 is attached to the outer periphery of the support shaft body 31A, the hooking protrusion 313 and the hooking recessed part 615 are fitted to each other, so that the support shaft body 31A and the core body 61 are attached to the support shaft body 31A. It is integrally rotatable around the central axis of the outer periphery of the. The number of hook recesses 615 matches the number of hook protrusions 313 on the support shaft 31 . Also, the number of pairs of guide recesses 616 and inner peripheral surface portions 617 corresponds to the number of guide protrusions 317 on the support shaft 31 . However, the number of hook recesses 615 can be increased compared to the number of hook projections 313 on the support shaft 31 . Also, the number of pairs of guide recesses 616 and inner peripheral surface portions 617 can be made larger than the number of guide projections 317 on the support shaft 31 .

The guide concave portion 616 is provided on the inner circumference of the core body 61 so as to extend from the end on the one axial end side toward the other axial end side. The guide recess 616 has an inner diameter larger than the outer diameter of the support shaft 31 . Compared to the hook recess 615 , the guide recess 616 is radially outward from the inner peripheral portion of the core 61 (more specifically, the inner peripheral surface, more specifically, the inner peripheral surface of the inner peripheral surface portion 617 or the thick portion 619 ). 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 recess. The guide recess 616 is formed at one end of the core 61 over the entire circumference of the core 61 (portion 6162a shown in FIG. 3). Therefore, when the core body 61 is externally inserted into the auxiliary mounting part 31B, it is not necessary to align the auxiliary mounting part 31B and the core body 61 around the central axis, so that the work can be facilitated. When the core body 61 is attached to the support shaft 31 , the guide recess 616 engages with the guide projection 317 to perform circumferential positioning with respect 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 projections 317 and the guide recesses 616 engage with each other so that the guide projections 317 and the guide recesses 616 are supported. They are 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. It has a guiding portion 6162 that extends and whose width dimension (circumferential dimension) increases toward one end. The width dimension of the positioning portion 6161 is substantially the same as the width dimension of the guide projection 317 . Specifically, it is larger (slightly larger) than the width dimension of the guide projection 317 to the extent that the axial movement of the core 61 with respect to the guide projection 317 is allowed.

In the portion of the guide portion 6162 where the inner peripheral surface portion 617 overlaps in the axial direction, the circumferential dimension is reduced from one end side to the other end side, so the core body 61 is displaced in accordance with this reduction. Circumferentially displaced (see FIG. 5, but FIG. 5 shows the movement and immobility of the core 61 and guide projections 317, contrary to reality). The hooking recess 615 of the core body 61 coincides with the hooking protrusion 313 of the support shaft 31 . In this way, the core 61 rotates with respect to the support shaft 31 and is aligned in the circumferential direction.

Of the guide portion 6162, a portion 6162a (see FIG. 3) where the inner peripheral surface portion 617 does not overlap in the axial direction has the effect of moving the core 61 in the circumferential direction by contact with the guide protrusion 317. not. This portion 6162 a acts to facilitate attachment of the core body 61 to the support shaft 31 . That is, the guiding portion 6162 has an inner diameter larger than the outer diameter of the support shaft 31 and is exposed at the end of the core 61 on the one axial end side. In this embodiment, it is exposed along the entire circumference. That is, the inner diameter of the core body 61 at one end in the axial direction is in a “loose” relationship with respect to the outer diameter of the support shaft 31 due to the exposed guiding portion 6162 . Therefore, insertion of the wound body 6 (core body 61) into the support shaft 31 is easier than in a configuration with no dimensional margin. Incidentally, the wound body 6 in which the packaging material 62 is wound around the core 61 is heavy (particularly, a new wound body 6 is particularly heavy because the packaging material 62 is not consumed at all), so insertion is difficult. Ease is a great advantage for users of the drug packaging device 1 . Incidentally, this action is also the action of the thin portion 618, which will be described later.

Here, a portion 6162a of the guide portion 6162 where the inner peripheral surface portion 617 does not overlap in the axial direction can be said to be a “free area” that allows the rotation of the core body 61 without restricting it. Further, the positioning portion 6161 is arranged so that the core body 61 cannot be rotated (specifically, the guide recess 616 of the core body 61 is axially displaced from the guide projection 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). A portion 6162b of the guide portion 6162 where the inner peripheral surface portion 617 overlaps in the axial direction is a “transition region” in which the rotatable range of the core body 61 is smaller on the other end side than on the one end side in the axial direction. It can also be said. The guide concave portion 616 continues from one axial end side to the other axial end side in the order of a free area, a transition area, and a restricted area.

The inner peripheral surface portion 617 is a portion adjacent to the guide concave portion 616 in the circumferential direction. The inner peripheral surface portion 617 is thicker (larger in radial dimension) than the guide recess 616 . The inner peripheral surface portion 617 is provided on the inner periphery of the core body 61 so as to extend from the other end in the axial direction toward the one end in the axial direction. 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 side of the hook recess 615 . The tip portion of the inner peripheral surface portion 617 has a shape opposite to that of the guiding portion 6162, and the circumferential dimension is reduced from the other end side toward the one end side. The shape of the inner peripheral surface portion 617 is asymmetrical in the axial direction.

The surface of the inner peripheral surface portion 617 is a curved surface curved with a constant curvature in the circumferential direction. The curvature in the circumferential direction of the surface of the inner peripheral surface portion 617 is the same (substantially the same) as the curvature in the circumferential direction of the outer peripheral surface of the support shaft 31 . Since the surface of the inner peripheral surface portion 617 is a broad curved surface, the inner peripheral surface portion 617 is in surface contact with the outer peripheral surface of the support shaft 31 when the core body 61 is attached. Here, for example, in a configuration in which a plurality of projections extending in the axial direction are formed on the inner peripheral surface of the core, the support shaft is in line contact with the outer peripheral surface of the support shaft. Deformation (distortion) may occur in the main body of the core, which is in a state of floating with respect to the axis. On the other hand, in the present embodiment, the surface of the inner peripheral surface portion 617 is in surface contact with the outer peripheral surface of the support shaft 31, so that the possibility that the core body 61 is deformed (distorted) as described above can be reduced.

Since the inner peripheral surface portion 617 is thick and the guide concave portion 616 is thin, a step is formed between the inner peripheral surface portion 617 and the guide concave portion 616 . That is, the circumferential edges of the positioning portion 6161 and the guiding portion 6162 of the guiding recess 616 are defined by the inner peripheral surface portion 617 . The inner peripheral surface portion 617 has a core body side slope 6171 that defines the width direction (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 hook recess 615 , the guide recess 616 , and the inner peripheral surface 617 is to be mounted on the support shaft 31 from one end side, first, the core is attached to the guide projection 317 of the support shaft 31 . The guiding part 6162 of the body 61 will be located. When the core body 61 is further moved in the axial direction, the positioning portion 6161 of the core body 61 changes so as to be positioned with respect to the guide protrusion 317 (see the position change indicated by the arrow in FIG. 5).

The positioning portion 6161 is also a guide portion that guides the guide protrusion 317 . The positioning portion 6161 as the guide portion is provided at the other end of the core body 61 and continues to the guide portion 6162. When the core body 61 is attached to the outer periphery of the support shaft main body 31A, the positioning portion 6161 and the hooking projection 313 are aligned. The guide projection 317 is guided so that the hook recess 615 is aligned in the circumferential direction around the central axis of the outer peripheral portion of the support shaft main body 31A. According to this, when the core body 61 is attached to the support shaft body 31A, it is not necessary to intentionally maintain the state in which the support shaft body 31A and the core body 61 are aligned around the central axis. The work can be facilitated.

The guide portion 6162 has a width dimension (circumferential dimension) that decreases in the direction from one end of the core body 61 toward the other end, and the core body 61 is attached to the outer circumference of the support shaft main body 31A. In this case, 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 main body 31A. According to this, when the core body 61 is attached 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, which facilitates the work. can.

Here, when the guide protrusion 317 is positioned at the circumferential end of the guide portion 6162 , the edge of the guide portion 6162 , that is, the core body side slope 6171 contacts the guide protrusion 317 . As a result, the positioning portion 6161 of the core 61 is guided to match the guide protrusion 317 . When the core body 61 is further moved in the axial direction, a part of the hooking protrusion 313 and a part of the hooking recessed part 615 are engaged while the guide projection 317 and the positioning portion 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 projection 317, and the hooking projection 313 and the hooking recessed portion 615 are completely fitted together, finally as shown in FIG. state.

The edge of the guiding portion 6162 (the core-body-side inclined surface 6171) may come into contact with the inclined surface of the reduced portion 3172 of the guide protrusion 317 (see FIG. 5). Here, the inclination in the axial direction of the inclined surface of the core-side inclined surface 6171, which is the edge of the guide portion 6162, and the reduced portion 3172 of the guide projection 317 is substantially the same. Therefore, the contact is made smoothly.

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

The core 61 also has a thin portion 618 and a thick portion 619 . The thin portion 618 is provided on the inner periphery on the one end side in the axial direction. Further, the thin portion 618 is fitted to 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 on the other end side in the axial direction, and is fitted to the main shaft portion 311 of the support shaft 31 when mounted on the support shaft 31 . The thick portion 619 is thicker than the thin portion 618 . The thin portion 618 corresponds to the guide recess 616 described above, and the thick portion 619 corresponds to the inner peripheral surface portion 617 described above. The thin portion 618 is formed for a purpose different from that of the guide recess 616 described above, but the formation range on the inner circumference of the core body 61 is the same as that of the guide recess 616 described above. It should be noted that the thin portion 618 and the guide concave portion 616 may have different forming ranges. The thick portion 619 is formed for a purpose different from that of the inner peripheral surface portion 617 described above, but the formation range of the core body 61 is the same as that of the inner peripheral surface portion 617 described above. It should be noted that the thick portion 619 and the inner peripheral surface portion 617 can be formed in different ranges.

Here, a phenomenon called "tight winding" may occur due to the stress remaining in the packaging material after winding (a force that shrinks in the longitudinal direction), the ambient temperature, or humidity during the manufacture of the wound body. Due to this "tight winding", a compressive force is applied to the core body in the radial direction. Due to this compressive force, the thin portion is deformed radially inward, and the outer periphery of the core may become distorted. As a result, the delivery of the packaging material becomes uneven, and the packaging of the medicine becomes unstable.

According to the core body 61 of this embodiment, the thin portion 618 is fitted to the base end shaft portion 312 of the support shaft 31 , and the thick portion 619 is fitted to the main shaft portion 311 of the support shaft 31 . A base end shaft portion 312 of the support shaft 31 has a diameter larger than that of the main shaft portion 311 . The outer diameter dimension of the base end shaft portion 312 of the support shaft 31 and the inner diameter dimension of the thin portion 618 of the core body 61 are the same to the extent that they can be inserted. The outer diameter dimension of the main shaft portion 311 of the support shaft 31 and the inner diameter dimension of the thick portion 619 of the core body 61 are set to be the same to the extent that they can be inserted. 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 allows the core body 61 to deform to the extent that delivery of the packaging material 62 is affected. Therefore, the core body 61 physically supported by the support shaft 31 can resist the compressive force caused by the tightly wound wrapping material 62 . In particular, in a region 619a on the other end side of the core body 61 relative to the center in the axial direction, the thick portion 619 occupies a larger proportion in the circumferential direction than the thin portion 618 . For this reason, the region 619a greatly contributes to resistance to the compressive force of tight winding.

- Reuse of used cores -
The core 61 is made of hard resin, for example. Therefore, the core body 61 can be reused after the packaging material 62 has been used up, so that it can be used repeatedly many times. This can contribute to saving petroleum resources, for example. Reuse is achieved by winding a new packaging material 62 around the used core 61 collected from the user of the medicine packaging device 1 . A new wound body 6 is manufactured by winding a new packaging material 62 around the core body 61 to be reused. In order to facilitate collection, the core 61 portion of the wound body 6 to be handed over to the user is lent so that the user can return the core 61. can encourage the collection of

The winding of the new packaging material 62 around the used core 61 is performed by, for example, wrapping the new packaging material 62 on a separate core (paper tube or the like) having an inner diameter larger than the outer diameter of the core 61. A method of attaching a prefabricated packaging material roll (wound body for replacement) to the used core 61 by winding may be employed. When this method is adopted, a spacer such as a rubber ring is interposed between the used core 61 and the separate core so that the outer diameter of the core 61 and the inner diameter of the separate core are different. You can also adjust the difference.

The new wound body 6 can be manufactured by the supplier of the wound body 6, or the supplier of the wound body 6 can instruct the user to perform the work related to the manufacturing. can also In the latter case, the used core 61 is left at hand of the user without being collected. Said instructions from the supplier of the roll 6 to the user may be explicit or implicit. The latter implied instruction includes the act of simply giving the replacement roll to the user.

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

REFERENCE SIGNS LIST 1 drug packaging device 2 packaging unit 3 packaging material supply unit 31 support shaft 31A support shaft main body 31B mounting aid (mounting 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 conveying portion 5 package forming portion 6 winding body 61 core body 615 hooking recess portion, first recess portion 616 Guide concave portion, second concave portion 6161 Positioning portion, guide portion 6162 Guide portion 617 Inner peripheral surface portion 618 Thin portion 619 Thick portion 62 Packaging material

Claims (1)

A wound body configured by winding a long sheet ,
The wound body can be supported by a support shaft, and is attached to the support shaft by being inserted from the distal end side of the support shaft toward the proximal end side,
The support shaft is
a spindle having a constant diameter;
a proximal shaft portion located closer to the proximal side than the main shaft portion and having a larger diameter than the main shaft portion;
The main shaft portion is provided with guide projections,
A plurality of hooking protrusions are provided on the proximal shaft portion at intervals in the circumferential direction,
The wound body is
a cylindrical core body mounted on the outer periphery of the support shaft;
and the sheet wound around the outer periphery of the core,
The core body is
a thin portion fitted to the base end shaft portion in a state of being attached to the support shaft;
a thick portion having a greater thickness than the thin portion and fitted to the main shaft portion when mounted on the support shaft ;
The thin portion is provided with a hooking recess that transmits a rotational force to the support shaft by fitting the hooking projection in a state where the core body is attached to the support shaft,
The core body is adjacent to the thick portion in the circumferential direction, and engages with the guide projection when the core body is attached to the support shaft so that the hooking projection and the hooking recessed portion are engaged with each other. A guide recess is provided for aligning the and in the circumferential direction,
The wound body, wherein the recessed amount of the guide recesses with respect to the inner peripheral surface of the core body is smaller than the recessed amount of the hooking recesses with respect to the inner peripheral surface of the core body .