JP2022175813A - Powder distribution device and powder dividedly packaging device - Google Patents

Abstract

To provide a powder distribution device and a powder dividedly packaging device that improve uniformity of powders to be distributed on a distribution disc.SOLUTION: A disc distribution unit is composed of: a weighing device 10 and a rotation drive unit disposed on its upper part; and a powder distribution disc 20 installed at the rotation drive unit's upper part. The weighing device 10 is fixed to a housing coupling unit 16 of a dividedly packaging device. Over the distribution disc 20 is provided a powder supply device 60 fixed to a housing. The powder supply device 60 includes: a powder storage container 62 that is detachably fixed to a support member 61 fixed to the housing; and a motor 63 for rotating and driving a rotation shaft (powder supply shaft) in the powder storage container 62. A scraping-out unit 50 scrapes out powders by an amount of one package from the distribution disc 20. The powders scraped out by the scraping-out unit 50 is transferred to a packaging device by a dropping hopper 51.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a powdered medicine distribution device for supplying and distributing powdered medicine little by little to distribution discs and a powdered medicine packaging device for supplying and packaging powdered medicines one by one from the distribution disc.

In a conventional powdered medicine dispensing apparatus, a pharmacist measures the weight of one prescription of powdered medicine, and stores the weighed powdered medicine in a hopper. The hopper has a vibrating surface whose bottom surface is inclined slightly downward from the horizontal surface. By vibrating the vibrating surface, the powdered medicine inside is discharged through the discharge port and sprinkled on the concave groove provided on the outer circumference of the distribution disk. Thus, a ring-shaped pile of powdered medicine is formed. Then, each packet is released from the pile of ring-shaped powdered medicine and contained in the wrapping paper.

However, in this case, the pharmacist had to measure the weight of the powder each time, which was a heavy burden on the pharmacist. In order to solve this problem, there is a device in which powdered medicine is discharged from a container containing the powdered medicine to a distribution disk using an actuator, and the weight of the discharged powdered medicine is measured by measuring the weight of the distribution disk. (Patent Document 1).

In addition, as a technology for quantitatively supplying powders and granules, although it is not powdered medicine, a screw shaft with a screw groove formed on the outer peripheral surface is rotatably inserted into the bottom of an inverted cone-shaped hopper, and the screw shaft is rotated to feed powder particles. A technique for discharging a body from below a hopper is known (Patent Document 2).

In the case of a general fixed-quantity discharge hopper for powdered medicine, only the degree of coincidence with the weighing target value is required, but in the distribution disc weighing method, the consistency of the flow rate during the dispensation onto the distribution disc is required. This is because if this constantness fluctuates, the mass of the deposited powdered medicine will be non-uniform over the 360° circumference of the distribution disc, and the mass of the powdered medicine contained in each packet will be different. If the target metering value is large, this mass non-uniformity will be diffused circumferentially by sufficiently many rotations of the distribution disc to complete the powder release. However, in the case of prescriptions for neonates and children, the total amount of the prescription may be as small as 0.5 g, and the number of rotations of the distribution disc to complete the release of this 0.5 g is reduced. There is a risk that the mass error in the 360° direction of the circumference of the .

Japanese Patent No. 6777832 JP-A-2000-211747

The technique described in Patent Document 1 does not consider evenly supplying a very small amount of powdered medicine to the distribution disc. It becomes uniform.

In addition, when the vertical screw system of Patent Document 2 is applied to a powdered medicine container, if there is a large amount of powdered medicine at the top of the screw, a large force is required to rotate the screw due to its weight, and in some cases it may be difficult to rotate the screw. As a result, there was a possibility that the powdered medicine inside could not be discharged.

SUMMARY OF THE INVENTION The problem to be solved by the present invention is to provide a powdered medicine dispensing device and a powdered medicine dispensing device that improve the uniformity of the powdered medicine dispensed on the distribution disc.

The powdered medicine distribution device of the present invention includes a powdered medicine supply device that contains powdered medicine and discharges the contained powdered medicine little by little, and a powdered medicine that receives the powdered medicine discharged from the powdered medicine supply device and rotates to distribute the powdered medicine evenly in the vicinity of the outer periphery. a distribution disc to be distributed to the distribution disc, a rotary drive unit on which the distribution disc is placed to rotationally drive the distribution disc, and a total weight of the distribution disc and the rotary drive unit provided below the rotary drive unit, excluding the powder drug supply device a weighing unit for measuring the weight of the powdered medicine supplied from the powdered medicine feeding device to the distribution disc by measuring the weight of the powdered medicine feeding device; A second drug container comprising a container, an inverted conical portion provided in a lower portion of the first drug container and having a downwardly decreasing diameter inside, and a cylindrical portion formed below the inverted conical portion. a part, a lower part of the first drug storage part and a second drug storage part, and a partition part for supplying powdered medicine from the first drug storage part to the second drug storage part; A screw close to the inner wall of the cylindrical portion is formed on the outer peripheral portion of the portion corresponding to the cylindrical portion from the inverted conical portion, and rotates to force the powdered medicine in the inverted conical portion downward along the recess of the screw. a powdered drug discharge shaft for transporting to and discharging from the lower end of the barrel.

The perspective view of the disk distribution part of the powder medicine packaging apparatus of embodiment. FIG. 2 is a front view of the disc distribution unit of the powder medicine packaging device of the embodiment; 1 is an exploded perspective view of a powder medicine supply device according to an embodiment; FIG. Sectional view of the powder medicine supply device of the embodiment The perspective view which shows a part of lower part of the medicine storage container of embodiment. FIG. 4 is a schematic diagram showing a powder drug ejection shaft and a cylindrical portion of the embodiment; Sectional drawing along the broken line A of FIG. Sectional drawing which shows the partition plate and rotating body of embodiment. Explanatory drawing of the bottom cover of embodiment Explanatory drawing of the rotating body of the embodiment Explanatory drawing of the bottom lid and rotating body of the embodiment Cross-sectional view of a modified powder medicine supply device Perspective view of the drive unit of the modified example The perspective view which shows the disk distribution part and weighing part of the powder medicine packaging apparatus of embodiment. FIG. 2 is a front view showing a disc distribution unit and a weighing unit of the powder medicine packaging device of the embodiment; FIG. 2 is an exploded front view of the disc distribution unit and the rotation drive unit of the powder medicine packaging device of the embodiment; 1 is a block diagram of a powder medicine packaging device according to an embodiment; FIG. 4 is a flow chart showing the operation of the powder medicine packaging device of the embodiment.

Hereinafter, a powdered medicine packaging device according to an embodiment will be described with reference to the drawings.

FIG. 1 is a perspective view of a disc distribution unit that is a part of the powdered medicine packaging device of this embodiment, and FIG. 2 is a front view of the powdered medicine packaging device. 1 and 2, the disc distribution unit is composed of a weighing device 10, a rotary drive unit 30 arranged above it, and a powder medicine distribution disc 20 installed above the rotary drive unit 30. The weighing device 10 is fixed to the housing connecting portion 16 of the packaging device.

A powder medicine supply device 60 fixed to a housing (not shown) is provided on the upper portion of the distribution disk 20 . The powdered medicine supply device 60 includes a powdered medicine container 62 detachably fixed to a support member 61 fixed to a housing (not shown), and a motor 63 for rotating a rotary shaft (powder medicine supply shaft) in the powdered medicine container 62 . and Reference numeral 50 denotes a scraping unit for scraping out the powdered medicine from the distribution disc 20 one packet at a time.

Next, the powder medicine supply device 60 will be described in detail with reference to FIGS. 3 to 6. FIG. FIG. 3 is an exploded perspective view showing the configuration of the main parts of the powdered medicine container 62, FIG. 4 is a cross-sectional view of the powdered medicine container 62, and FIG. FIG. 4B shows a state in which the shutter 622 is opened.

The powdered drug storage container 62 is provided in the upper part and has a first drug storage part 610 which is formed cylindrical inside and can store a large amount of powdered drug therein. An upper lid 619 is provided on the upper portion of the first medicine container 610 so as to be able to be opened and closed. A second medicine container 620 is provided below the first medicine container 610 to contain a smaller amount of powdered medicine than the first medicine container 610 . A partition plate 660 (partition section) is sandwiched between the first drug storage section 610 and the second drug storage section 620 .

A powder medicine supply shaft 630 that is rotationally driven by a motor 63 is provided inside the first medicine container 610 . Although not shown, a power transmission mechanism that is rotated by the rotation shaft of the motor 63 is attached to the upper portion of the powder medicine supply shaft 630 . This power transmission mechanism is generally a motor 63 whose rotating shaft is decelerated by a gear. However, it may be a contact type rubber roller, driven by a belt, or a non-contact roller using magnetism.

In addition, the lower part of powdered medicine supply shaft 630 is connected to a rotating body of partition plate 660, which will be described in detail later. supplied.

The lower portion of the powdered medicine supply shaft 630 is axially detachably connected to a powdered medicine discharge shaft 632 having a screw 633 for discharging the powdered medicine from the second medicine container 620 to the outside. As the supply shaft 630 rotates, the powdered medicine in the second medicine container 620 is discharged to the outside.

While the inside of the first drug containing portion 610 is substantially cylindrical, the second drug containing portion 620 has a substantially cylindrical upper portion and a lower portion whose diameter decreases downward. An inverted cone portion 626 is formed. A cylindrical portion 628 formed integrally with the inverted conical portion 626 is provided below the inverted conical portion 626 .

A powdered medicine discharge port 639 is formed in the lower portion of the cylindrical portion 628, and the powdered medicine discharge port 639 is closed by a shutter 622 when the powdered medicine is not discharged. A shutter opening/closing mechanism 640 is a mechanism for opening and closing the shutter 622 , and the shutter 622 is closed when the shutter driving portion 642 is urged upward by a spring 644 . Further, when the shutter driving lever 64 is driven downward by a motor (not shown), the shutter driving portion 642 is pressed downward, and the shutter 622 rotates around the rotating shaft 623, thereby opening the shutter 622.

As described above, the lower portion of the powdered drug discharge shaft 632 extends from the inverted conical portion 626 to the portion corresponding to the cylindrical portion 628, and the inner wall of the cylindrical portion 628 extends from the inverted conical portion 626 to the portion corresponding to the cylindrical portion 628. A screw 633 is formed close to the . A gap between the outer circumference of the screw 633 and the inner wall of the cylindrical portion 628 may be partially in contact with each other as long as the gap is close enough to prevent the stored powdered medicine from falling. With this configuration, the powdered medicine in the inverted conical portion 626 is transported downward along the concave portion of the screw 633 by rotating the powdered medicine discharge shaft 632, and is discharged from the powdered medicine discharge port 639 at the bottom of the cylindrical portion 628. be done.

FIG. 5 is a perspective view of the powdered medicine container 62 viewed from below, showing a state in which the shutter 622 closing the powdered medicine discharge port 639 is opened. As can be seen from FIGS. 4 and 5 , the lower portion of the powdered drug discharge shaft 632 is supported by a bearing 638 provided at the lower portion of the cylindrical portion 628 .

6 schematically shows the relationship between the screw 633 of the powder medicine ejection shaft 632 and the cylindrical portion 628. FIG. 6(a) shows a cross-sectional view, and FIG. It is the figure which looked at 633 from the downward direction. In FIG. 6(a), the powdered drug discharge shaft 632 rotates clockwise 120 when viewed from above. Moreover, since FIG. 6B is a view of the screw 633 viewed from below, the direction of rotation thereof is counterclockwise.

The lead of the screw 633 of the powdered medicine ejection shaft 632 is formed with a pitch L, and the powdered medicine P is accommodated in the concave portion of the screw 633. released to

When the powdered medicine P is transferred only by the rotation of the screw 633, the powdered medicine P in the recessed portion of the screw 633 is compressed by friction with the inner wall of the cylindrical portion 628 at the bottom of the screw 633 and becomes a mass (so-called "dump"). There is In that case, when the screw 633 rotates and the powdered medicine P is discharged from the powdered medicine discharge port 639 at the bottom of the screw 633, the powdered medicine P drops as a lump, resulting in an uneven distribution on the circumference of the distribution disk 20. There is a possibility that the powdered medicine P will be distributed.

In order to prevent this, for example, only in the recess 650 at the bottom of the screw 633, a peak 652 projecting radially from the recess is formed at a position 1/2L of the lead of the recess 650 and the tip of the peak 652 is formed. An application is also conceivable in which the effect of loosening lumps of the powdered medicine P housed in the concave portion of the screw 633 is achieved. Here, as can be seen from FIG. 6(b), the height of this peak portion 652 is formed so as to gradually increase from the tip in the rotational direction, and the width of this peak portion 652 (the width of the powdered drug discharge shaft 632) is increased. As can be seen from FIG. 6(a), the thickness in the axial direction is formed such that the width gradually increases from the tip in the direction of rotation. Therefore, by forming the powdered medicine supply shaft 632 in such a shape, the powdered medicine P can be uniformly distributed on the distribution disc 20 without being discharged in lumps.

In addition, as shown in FIG. 4, the powdered drug discharge shaft 632 is provided with two supporting portions 635 formed to protrude from the powdered drug discharging shaft 632 in the radial direction. A stirring member 637 is formed along the vicinity of the inner wall surface of the. The stirring member 637 rotates together with the rotation of the powdered medicine discharge shaft 632 and has a function of transferring the powdered medicine P near the inner wall of the inverted conical portion 626 to the powdered medicine discharge shaft 632 side.

That is, the shape of the stirring member 637 is a triangular prism as shown in FIG. 7 when viewed from the direction of arrow A in FIG. A side not in contact with the side surface 637 a is connected to the support portion 635 . Further, the angle θ formed by the two side surfaces sandwiching the side 637b at the tip of the stirring member 637 in the rotational direction is formed to be an acute angle.

When the powdered medicine P is transported downward by the screw 633 of the powdered medicine discharging shaft 632, only the powdered medicine P near the powdered medicine discharging shaft 632 is discharged, and the powdered medicine P is reduced in the central portion of the inverted conical portion 626 like a so-called "ant hell". By configuring the stirring member 637 in such a triangular prism shape, the powdered medicine P near the inner wall of the inverted conical portion 626 can be collected near the powdered medicine discharge axis 632 . In this embodiment, only one agitating member 637 is provided around the powdered medicine discharge shaft 632, but it is of course possible to provide two or more.

A similar stirring member is also provided on the powder medicine supply shaft 630 in the first medicine container 610 . That is, the powdered drug supply shaft 630 is provided with two support portions 612 formed to protrude in the radial direction, and the tips of these support portions 612 are provided along the vicinity of the inner wall surface of the first drug storage portion 610. An agitating member 614 is formed. The stirring member 614 rotates together with the rotation of the powdered medicine supply shaft 630 and has a function of transferring the powdered medicine P in the first medicine container 610 to the powdered medicine supply shaft 630 side.

Next, an example of the structure and mechanism for supplying the powdered medicine from the first medicine container 610 to the second medicine container 620 will be described with reference to FIGS. 8 to 10. FIG. FIG. 8 is a cross-sectional view of the first medicine containing portion 610, the second medicine containing portion 620, and the partition plate 660 (partition portion) therebetween.

FIG. 9 shows a bottom lid 661 that forms the upper portion of the partition plate 660 and closes the lower portion of the first medicine container 610. (a) is a top view, (b) is a side view, (c) is a view from directly below. Further, FIG. 10 shows a rotating body 670 that forms the lower part of the partition plate 660 and contacts the lower surface of the bottom lid 661. Similarly, (a) is a top view, (b) is a side view, (c) is a diagram viewed from directly below. Further, FIG. 11 shows a state in which the bottom lid 661 and the rotating body 670 are about to be combined. It is a diagram.

As shown in FIG. 8, a bottom lid 661 of a partition plate 660 (partition) and a rotating body 670 are provided in combination at the lower portion of the first medicine container 610 . A bottom lid 661 constituting the partition plate 660 has a central through hole 666 through which the powdered medicine supply shaft 630 passes, and adjacent to the through hole 666, the powdered medicine contained in the first medicine containing portion 610. Two holes 662a and 662b are formed to drop.

On the other hand, on the lower side (back side) of the bottom lid 661, a first guide wall 663 projecting downward is formed around the through hole 666. As shown in FIG. Further, second guide walls 664a and 664b extending from the first guide wall 663 toward the outer circumference are formed. The second guide walls 664a and 664b are formed at positions surrounding the holes 662a and 662b, respectively, from the first guide wall 663, and after reaching the holes 662a and 662b, the first guide walls 663 and 664b are extended so that the intervals between are equal. No guide walls are formed at the ends of the second guide walls 664a and 664b. and These guide walls 663, 664a and 664b are all formed to have the same height.

Further, as shown in FIGS. 8 and 11, a rotating body 670 is provided in the lower portion of the bottom cover 661, and the upper surface of the rotating body 670 is provided in contact with the lower surfaces of the guide walls 663 and 664a, 664b. The rotating body 670 is a disk-shaped structure, and has a cylindrical projection 672 formed in the upper center thereof for fitting into the through hole 666 of the bottom lid 661 . The outer diameter of the cylindrical protrusion 672 is rotatably in contact with the inner surface of the through hole 666 of the bottom lid 661, and the diameter of the rotating body 670 is large enough to be in contact with the guide walls 664a and 664b on the lower side (back side) of the bottom lid 661. It is Furthermore, a second rotating body 673 made of silicon, which rotates together with the rotating body 670, is adhered to the surface of the rotating body 670 at a portion provided on the back surface of the bottom lid 661 and in contact with the guide walls 664a and 664b. .

By configuring the bottom lid 661 and the rotating body 670 in this manner, the powdered medicine dropped from the holes 662 a and 662 b of the bottom lid 661 is placed on the second rotating body 673 . Then, when the rotating body 670 rotates, powdered medicine is placed on the second rotating body 673 and transferred as indicated by arrows 669a and 669b in FIGS. Since the transfer in the rotational direction is regulated by the guide walls 664a and 664b, the transfer in the outer peripheral direction and the rotational direction of the rotating body 670 is performed along the second guide walls 664a and 664b.

Then, finally, the powdered medicine is discharged into the second medicine container 620 from the discharge ports 665a and 665b between the second guide walls 664a and 664b. In addition, the partition plate is not limited to such a structure. Other structures are also applicable as long as the body of rotation is rotated by 630 .

4 and 8, the medicine guide body 615 is formed below the powdered medicine supply shaft 630 of the first medicine containing part 610, and the powdered medicine inside the first medicine containing part 610 is guided to the holes 662a and 662b. It is a guide body that guides so that it can be pulled.

In the embodiments described so far, the screw 633 that releases the powdered medicine from the second medicine containing portion 620 to the outside, and the rotating body that supplies the powdered medicine from the first medicine containing portion 610 to the second medicine containing portion 620 670 is a single motor 63 which is driven to rotate by a powdered medicine discharge shaft 632 and a powdered medicine supply shaft 630 which are common rotary shafts. Therefore, if there is a difference between the amount of powdered medicine released from the second medicine containing portion 620 to the outside by the screw 633 and the amount of powdered medicine supplied from the first medicine containing portion 610 to the second medicine containing portion 620, it may take a long time. By repeating the time-release, there is a possibility that the amount of powdered medicine in the second medicine containing portion 620 may decrease, or conversely, the second medicine containing portion 620 may become full of powdered medicine.

In particular, when there is no powdered medicine in the second medicine container 620, the amount of powdered medicine scattered on the distribution disk 20 becomes uneven, and as a result, there is a possibility that a problem may arise in the distribution accuracy when each packet is packaged. In addition, when the second drug container 620 is filled with powdered medicine, the amount of the powdered medicine discharged is not uniform, or a large force is required to rotate the screw 633 due to the weight of the powdered medicine. There is also the risk that it will not be possible to rotate and release the powdered medicine.

The reason for the increase or decrease in the amount of powdered medicine in the second medicine containing portion 620 is the powdered medicine discharge shaft 632 of the screw 633 for discharging the powdered medicine from the second medicine containing portion 620 and the second medicine containing portion 610 from the first medicine containing portion 610. This is because the same motor 63 rotates the powdered medicine supply shaft 630 of the rotating body 670 that supplies the powdered medicine to the medicine container 620 .

This problem is to have a structure in which the screw 633 and the rotating body 670 are rotated independently of each other, detect the amount of the powdered medicine contained in the second medicine containing part 620, and detect the amount of the powdered medicine less than the first predetermined amount. powdered medicine is supplied from the first medicine containing part 610 to the second medicine containing part 620, and the amount of the powdered medicine contained in the second medicine containing part 620 is larger than the first predetermined amount. It is possible to solve the problem by stopping the supply of the powdered medicine when it exceeds the predetermined amount of 2.

A modification of the powder medicine supply device for solving this problem will be described in detail with reference to FIGS. 12 and 13. FIG. FIG. 12 is a cross-sectional view of the powder medicine supply container 162 omitting the driving part, and FIG. 13 is a perspective view showing the driving parts of the powder medicine supply shaft and the powder medicine discharge shaft.

In FIG. 12, the powdered medicine supply container 162 contains a large amount of powdered medicine inside, and has a first medicine containing part 710 having an upper lid 719 at the top, and a second medicine containing part 710 inside having a screw 733 for releasing the powdered medicine inside to the outside. It is the same as the first embodiment in that it has a structure in which a partition plate 760 is sandwiched between the drug storage section 720 and the drug storage section 720 . The modification differs from the first embodiment mainly in the configuration of the rotating shaft and the driving section.

A powdered medicine supply shaft 730 for rotating a rotating body 770 for supplying powdered medicine from the first medicine containing portion 710 to the second medicine containing portion 720 is fitted with the rotating body 770 at its lower portion. It is provided up to the upper portion of the supply container 162 . The powdered medicine supply shaft 730 is hollow, and a second rotating shaft 790 for discharging powdered medicine is provided inside the shaft of the powdered medicine supply shaft 730 at the same center of rotation as the powdered medicine supply shaft 730, and Independently rotatable. In addition, the second rotating shaft 790 is provided in such a manner that its upper end protrudes above the powdered medicine supply container 162 and above the powdered medicine supply shaft 730 . The second rotating shaft 790 is connected in a fitted manner to a powdered drug discharge shaft 732 having a screw 733 below it for discharging the powdered drug from the second drug container 720 to the outside.

As shown in FIG. 13, a powdered medicine supply passive roller 194 is provided above the powdered medicine supply shaft 730 , and the powdered medicine supply passive roller 194 is attached to the shaft of the powdered medicine supply motor 197 via an idle roller 195 . It is in contact with the powder supply drive roller 196 . In addition, a powdered medicine discharging passive roller 203 is provided above the second rotating shaft 790, and this powdered medicine discharging passive roller 203 is a powdered medicine discharging drive roller attached to the shaft of a powdered medicine discharging motor 205 via an idle roller 204. 206. As in the first embodiment, each of these rollers can achieve its purpose whether it is a contact roller such as a rubber roller, driven by a gear or belt, or a non-contact roller using magnetism. In addition, 719 indicates the upper lid of the powdered drug storage container.

In discharging the powdered medicine, the powdered medicine discharging motor 205 is driven to rotate the second rotary shaft 790, and the powdered medicine discharging shaft 732 and the screw 733 fitted at the bottom are rotated, thereby discharging the second medicine. The powdered medicine is released from the container 720 to the outside.

On the other hand, whether or not there is a required amount of powdered medicine in the second medicine containing portion is detected by a transmission sensor S1 provided in the second medicine containing portion 720, for example. Specifically, when there is no powdered medicine at the low level (L) (when the amount is less than the first predetermined amount), the powdered medicine supply motor 197 is driven to rotate the powdered medicine supply shaft 730 and the rotating body 770. By rotating, the powdered medicine in the first medicine container 710 is supplied to the second medicine container 720 .

Further, whether or not the powdered medicine is sufficiently supplied to the second medicine container 720 is detected by the transmission sensor S2. Specifically, the supply is continued until the high level (H) when there is no powdered medicine. Then, when the height of the powdered medicine reaches the H level (when it exceeds the second predetermined amount, which is greater than the first predetermined amount), the powdered medicine supply motor 197 is stopped. In this manner, while detecting the state of the amount of powdered medicine in the second medicine container 720 with the sensors S1 and S2, by controlling the rotation of the powdered medicine supply motor 197, the inside of the second medicine container 720 is detected. always has an appropriate amount of powder that can be released to the outside.

Since the amount of the powdered medicine inside the second medicine containing portion 720 is small and constant in this way, the weight of the screw 733 is small, and accurate and stable discharge is possible. As a result, the powdered medicine scattered around the outer periphery of the distribution disc 20 becomes uniform in the circumferential direction.

Next, the powder medicine dispensing device will be described with reference to FIGS. 2 and 14 to 18. FIG.
14 is a perspective view of a state in which the distribution disc 20 is removed from the disc distribution section, and FIG. 15 is a front view of a state in which the distribution disc 20 is removed from the disc distribution section. FIG. 16 is a diagram showing a state in which the rotary drive section 30 is disassembled and the motor 32 and the pulley 38 are moved upward from the base 31 of the rotary drive section 30. As shown in FIG.

As shown in FIGS. 14 to 16, the base 31 of the rotation driving section 30 is fixed to the object mounting section 12 of the weighing device 10. As shown in FIG. As shown in the exploded view of FIG. 16, a bearing 35 is fixed to the base 31, and a pulley 38 is rotatably provided around the bearing 35. As shown in FIG. A distribution disc base 36 is fixed to the upper portion of the pulley 38, and a distribution disc 20 is detachably fixed to the upper portion of the distribution disc base 36. As shown in FIG.

A timing gear is formed on the outer periphery of the pulley 38 , and a timing belt 34 is stretched between the pulley 38 and a timing gear 33 attached to the shaft of the motor 32 fixed to the base 31 .

With such a configuration, the weighing device 10 includes the base 31 of the rotation drive unit 30 fixed to the object mounting unit 12 of the weighing device 10, and the motor provided on the base 31 32, pulley 38, bearing 35, distribution disc base 36, distribution disc 20, etc. can be measured. In other words, when powdered medicine is not supplied to the distribution disk 20, the weight of the tare of the rotary drive unit 30 and the like is measured.

Returning to FIG. 2, powdered medicine is dropped little by little into the grooves of the distribution disk 20 from the powdered medicine supply device 60 provided on the upper part of the distribution disk 20 . The powdered medicine supply device 60 is fixed to the housing of the packaging device and is not subject to weight measurement by the weighing device 10 . Therefore, the weighing device 10 weighs the weight obtained by adding the weight of the powdered medicine supplied from the powdered medicine storage container 62 to the distribution disk 20 to the total weight of the rotary drive part 30 fixed to the object mounting part 12, the distribution disk 20, etc. will be measured. Therefore, by subtracting the above-mentioned tare weight from the weight measured by the weighing device 10, the weight of the powdered medicine actually supplied from the powdered medicine container 62 to the distribution disk 20 can be calculated.

When supplying the powdered medicine from the powdered medicine container 62 to the distribution disc 20 , the motor 32 rotates the distribution disc 20 while the motor 63 of the powdered medicine supply device 60 is rotated, whereby the powdered medicine is supplied from the powdered medicine container 62 onto the distribution disc 20 . let it drop. This forms an annular pile of powder on the distribution disc 20 .

Reference numeral 50 denotes a raking portion for dropping the annular powdered medicine formed on the distribution disk 20 into a drop hopper 51 one packet at a time. In the raking portion 50 , a lever 53 can be rotated up and down around a shaft 54 by a motor 52 . A disk 55 is attached to the tip of the lever 53 and can be rotated in the direction of arrow 56a by a motor 56. As shown in FIG. When the powdered medicine is to be wound onto the rotating distribution disc 20, the lever 53 rotates counterclockwise to move the disc 55 away from the distribution disc 20, and when the powdered medicine is to be dispensed from the distribution disc 20, the lever 53 rotates clockwise. The disc 55 comes into contact with the distribution disc 20.

As the disk 55 rotates, the powdered medicine wound on the distribution disk 20 is dropped one by one into the drop hopper 51 and is accommodated between the packaging papers 57 folded in two. These scraping portions 50 are a well-known technique, and are described in, for example, Japanese Patent Application Laid-Open No. 2019-202801.

Here, the weighing device 10 is provided under the distribution disk 20, and the packaging paper 57 containing the powdered medicine cannot be conveyed in the horizontal direction as described in Japanese Patent Application Laid-Open No. 2019-202801. That is, in order to drop the powder discharged from the distribution disc 20 into the drop hopper 51 and store it in the horizontally transported wrapping paper, the drop hopper 51 must be elongated vertically. This can result in an inaccurate weight of the packaged powder due to the powder passing through a long drop hopper and more powder adhering to the drop hopper. In addition, since the drop hopper 51 becomes large, there is a possibility that the packaging device also becomes large.

For this reason, as shown in FIG. 2, the packaging apparatus 70 is an obliquely conveying packaging apparatus. That is, a horizontally conveying packaging device 70 having a roll (not shown) wrapped with the packaging paper 57 folded in two is mounted obliquely on the bottom surface of the packaging device 70 with respect to the packaging device. ing. The packaging paper 57 pulled forward from this roll is transported obliquely downward to the right on the front side.

Then, as shown in FIG. 2, the powdered medicine distributed from the distribution disc 20 is dropped into the drop hopper 51 immediately below the distribution disc 20 and accommodated between the packaging papers 57 folded in two. The packaging paper 57 containing the powdered medicine is sealed one by one in the packaging device 70, conveyed obliquely in the lower right direction in the drawing, passes under the weighing device 10, and is accumulated in the packaged medicine accumulation section 75. be done. In this manner, by making the transportation path of the packaging paper 57 of the packaging device 70 oblique, even if the weighing device 10 is provided below the distribution disk, the device can be configured without increasing its size. The packaging paper 57 containing the powdered medicine may be taken up by a reel provided in the packaged medicine stacking section 75, or may be transported and discharged outside the machine.

FIG. 17 is a block diagram of a powdered medicine packaging device. In FIG. 17, reference numeral 300 denotes a powder medicine packaging device, and its overall control unit 310 is connected to a prescription system 400 of a pharmacy. The overall control unit 310 is connected to the packaging device 70 and the disc distribution control unit 340 of the disc distribution unit 330 . The disc distribution control unit 340 of the disc distribution unit 330 includes a first motor 32 for rotating the distribution disc 20, a second motor 52 for driving the scraping disc lever, a third motor 56 for rotating the disc, and powder medicine supply. A driving motor 63 of the device 60 and the weighing unit 10 are connected respectively.

Next, the weighing operation of the disc distribution unit configured in this manner will be described with reference to FIG.

When the powdered medicine packing operation is started, the overall control unit 310 acquires the type of powdered medicine to be prescribed and the weight information of one prescription of the powdered medicine from the prescription system 400 (ST1). The overall control unit 110 outputs the acquired powdered medicine weight information to the disc distribution control unit 340 of the disc distribution unit 330 . After that, the disc distribution control unit 340 drives the motor 32 of the rotation drive unit 30 to rotate the distribution disc 20 (ST2), and the preparation for supplying the powder medicine to the distribution disc 20 is completed. Then, before the powdered medicine is supplied, the tare weight of the distribution disk 20, the rotary drive unit 30, etc. is measured (ST3). This tare weight may be subtracted from the weight measured after the powder is dispensed to calculate the weight of the powder alone, or the weight of the tare weight may be used as a zero reference to obtain the weight of the powder alone. may

After that, the disc distribution control unit 340 operates a shutter opening/closing (opening/closing arm drive) motor (not shown) to drive the shutter drive lever 64, thereby opening the shutter 622 of the powdered medicine container 62 (ST4). By rotating the drive motor 63 of the powdered medicine supply device 60 (ST5), the powdered medicine is dropped little by little from the powdered medicine storage container 62 onto the distribution disc 20 . While dropping the powdered medicine in this manner, the weight of the powdered medicine dropped onto the distribution disk 20 is measured by the weighing device 10 (ST6).

Thereafter, while supplying the powdered medicine, it is determined whether or not the measured weight of the powdered medicine has reached the weight of one prescription amount (ST7), and this is continued until the weight of the supplied powdered medicine reaches the weight of one prescription amount. . When the weight of one prescription amount is reached, driving of the driving motor 63 of the powdered medicine supply device 60 is stopped, and the shutter opening/closing (opening/closing arm driving) motor is operated to close the shutter 622 of the powdered medicine container 62 . Furthermore, the motor 32 of the rotation driving section 30 is stopped (ST8).

When one prescription of powdered medicine is supplied to the distribution disc 20, the second motor 52 is rotated to move the scraping disc 55 so as to come into contact with the distribution disc 20. is intermittently rotated, and a scraping operation is performed in which the scraping unit 50 drops the powdered medicine one package at a time into the drop hopper 51 (ST9). The powdered medicine dropped into the drop hopper 51 is sealed one by one by the packaging device 70 and accumulated in the packaged medicine accumulation section 75 .

According to the embodiment configured as described above, a large amount of powdered medicine can be stored in the first drug storage part, and the powdered drug can be stably and accurately discharged to the outside from the second drug storage part. As a result, even a small amount of powdered medicine can be evenly scattered in the circumferential direction of the distribution disk 20. - 特許庁

Although several embodiments and variations of the invention have been described, these embodiments and variations are provided by way of example and are not intended to limit the scope of the invention. These novel embodiments and modifications can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. For example, with regard to the partition structure between the first drug storage section and the second drug storage section, by combining two holes, a partition plate with a guide wall formed on the back side, and a rotating body below the partition plate, the drug dropped from the hole can be separated. is received by the rotator and supplied to the second drug container along the guide wall from the outlet provided on the outer periphery, but it is not necessarily limited to this. These embodiments and their modifications are included in the scope and spirit of the invention.

DESCRIPTION OF SYMBOLS 10... Weighing part 20... Distributing disc 30... Rotating drive part 50... Scraping part 51... Falling hopper 60... Powdered drug supply device 62... Powdered drug storage container 63... Powdered drug Supply motor 70 Packaging device 610 First drug containing portion 614 Stirring member 620 Second drug containing portion 624 Main body of drug containing portion 626 Inverted conical portion 628... Cylindrical part 630... Powdered drug supply shaft 632... Powdered drug discharge shaft 633... Screw 635... Support part 637... Stirring member 637a... One side 637b of triangular prism... Side 650 at the tip of the rotational direction...Lowermost concave portion 652...Mountain portion 660...Partition plate 661...Bottom lid 662...Hole 663...First guide wall 664... Second guide wall 670... Rotating body

Claims (7)

a powdered medicine supply device that stores powdered medicine therein and releases the stored powdered medicine little by little;
a distribution disk that receives the powdered medicine discharged from the powdered medicine supply device and rotates to evenly distribute the powdered medicine near the outer circumference;
a rotary drive unit on which the distribution disc is placed and which rotates the distribution disc;
By measuring the total weight of the distribution disk and the rotation drive unit provided below the rotary drive unit, excluding the powdered drug feeder, the weight of the powdered medicine supplied from the powdered drug feeder to the distribution disc is determined. and a weighing unit for measuring,
The powder medicine supply device
a first drug containing portion having a cylindrical interior for containing powdered medicine;
a second drug containing portion provided in a lower portion of the first drug containing portion and having an inverted conical portion whose inner diameter decreases downward; and a cylindrical portion formed below the inverted conical portion. ,
a partition part that partitions the lower part of the first medicine containing part and the second medicine containing part and that supplies powdered medicine from the first medicine containing part to the second medicine containing part;
A screw extending from the inverted conical portion to the cylindrical portion is formed on the outer peripheral portion of the portion corresponding to the cylindrical portion from the inverted conical portion and is close to the inner wall of the cylindrical portion. a powdered medicine discharge shaft that conveys the powdered medicine in the portion downward along the recess of the screw and discharges it from the lower end of the cylindrical part;
A powdered medicine dispensing device comprising: The powder drug release axis is
A ridge portion is formed only in the recess at the bottom of the screw so as to protrude radially from the recess and loosen the powdered medicine transported by the recess of the screw.
2. The powder drug dispensing device of claim 1, wherein: The partition part
Having a rotating body that rotates to supply the powdered medicine from the first medicine container to the second medicine container,
further comprising a powdered drug supply shaft that rotationally drives the rotating body in the first drug storage unit,
3. A powder medicine dispensing device according to claim 1 or claim 2, characterized in that: The partition part
a bottom lid formed with a hole for blocking the lower portion of the first medicine containing portion and for dropping the powdered medicine from the first medicine containing portion, and a guide wall extending from the center toward the outer circumference on the lower side;
It is rotatably provided in the lower part of the bottom lid, and the upper surface of the lid rotates in contact with the lower surface of the guide wall, so that the powdered medicine dropped through the hole of the bottom lid is placed and accompanied by rotation. a rotating body that transfers the powdered medicine from the inner peripheral side to the outer peripheral side along the guide wall and releases it into the second drug storage part from a discharge port formed at the outer peripheral end;
A powder medicine supply shaft is provided in the first medicine container through a through-hole formed in the bottom cover, and further comprises a powder medicine supply shaft that rotates the rotating body.
3. A powder medicine dispensing device according to claim 1 or claim 2, characterized in that: The powder drug supply shaft and the powder drug discharge shaft are different shafts having the same center of rotation and are rotated independently.
5. A powder medicine dispensing device according to claim 3 or claim 4, characterized in that: A sensor is provided in the second medicine container for detecting the amount of the powdered medicine contained in the second medicine container, and the amount of the powdered medicine in the second medicine container is detected by the sensor. When it is detected that the amount is less than the predetermined amount of 1, the powder medicine supply shaft is rotated to start supplying the powder medicine from the first medicine container to the second medicine container. When it is detected that the amount of the powdered medicine in the second medicine container exceeds a second predetermined amount, which is larger than the first predetermined amount, the rotation of the powdered medicine supply shaft is stopped and the first medicine container is supplied. stopping the supply of the powdered medicine from the drug containing portion to the second drug containing portion;
6. The powder drug dispensing device of claim 5, wherein: A powder drug dispensing device according to any one of claims 1 to 6;
a packaging device that releases powdered medicines one by one from the distribution disk and packs them;
A powder medicine packaging device characterized by comprising:

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