JP6860246B1 - Powder packaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a powder dispensing device capable of accurately weighing the powder to be packaged by weighing the actual powder powder supplied to the distribution disk immediately before distribution. SOLUTION: A distribution disk in which powder for one prescription is dropped evenly by dropping it near the outer periphery of the disk, a rotary drive unit on which the distribution disk is placed and driving the distribution disk to rotate, and rotation. A powder storage container that drops powder little by little to supply the powder to the distribution disk, and a distribution disk that is provided below the rotary drive unit and measures the total weight of the distribution disk and the rotary drive unit to distribute the powder from the powder storage container. A weighing unit that measures the weight of the powder supplied to the container, a control unit that controls the supply of powder from the powder storage container to the distribution disk based on the weight measurement result of the weighing unit, and one packet of powder from the distribution disk. It has a packaging device for releasing and packaging. [Selection diagram] Fig. 1

Description

The present invention relates to a powder packaging device that supplies and packages powders one by one.

In powder packaging equipment, which has long been used for automating drug dispensing operations, the most important challenge required is to ensure that the content of a single package matches the amount specified in the prescription. .. In order to satisfy this problem, in the conventional powder packaging device, the pharmacist weighs the amount of one prescription for the powder prescribed in advance on the weighing table, and then puts this into the packaging device for rotational distribution. The apparatus was divided into a predetermined number of packages, and the divided powders were individually packaged one by one with a packaging machine (Patent Document 1).

On the other hand, in recent years, in order to reduce the burden of pre-weighing work by the pharmacist, an apparatus capable of automatically weighing one prescription has been developed (Patent Document 2). ..

Japanese Unexamined Patent Publication No. 7-80043 Japanese Unexamined Patent Publication No. 2014-88193

In the apparatus described in Patent Document 1, the weight of the discharged powder is calculated by weighing the container before and after discharging the powder from the powder containing cassette. Further, in the apparatus described in Patent Document 2, the weight including the powder powder storage container and the rotating disk is weighed by the weighing unit, and the amount of powder charged into the powder powder storage container is calculated.

However, in the technique described in Patent Document 1, the weight of the powder dropped from the powder storage cassette into the trough of the measuring device is measured, and the measured powder is further supplied from the trough to the groove of the rotating body. Therefore, the measured weight of powder does not always match the weight of powder supplied to the groove. That is, a small amount of powder remains in the trough, and the amount of powder supplied to the rotating body is less than the measured amount. This is clear from the statement that the remaining powder must be cleaned.

Further, in the technique described in Patent Document 2, the weight of the powder containing powder containing the powder and the rotating disk is measured, and the powder is dropped from the powder containing container onto the rotating disk to contain one package of the dropped powder. It is distributed to each. Therefore, even in Patent Document 2, the powder adhering to the powder storage container does not fall, and the weight of the powder to be distributed does not always match the weight calculated by measurement.

The problem to be solved by the present invention is to provide a powder dispensing device capable of accurately measuring the weight of the powder to be packaged by measuring the weight of the powder actually supplied to the distribution disk immediately before distribution. The purpose is to provide.

In order to solve the above problems, the powder packaging device of the present invention includes a distribution disk in which powder is evenly distributed by dropping a prescription powder in the vicinity of the outer periphery of the disk, and the distribution disk. A rotary drive unit that rotates the distribution disk on which the powder is placed, a powder storage container that drops and supplies powder to the rotating distribution disk little by little, and powder from the powder storage container to the distribution disk. By measuring the total weight of the distribution disk excluding the powder storage container and the rotation drive unit provided below the vibration unit and the rotation drive unit, the powder is powdered from the powder storage container to the distribution disk. A weighing unit that measures the weight of the powder supplied while dropping the container, and a weight increase value per unit time when the powder is supplied from the powder storage container to the distribution disk based on the weight measurement result of the weighing unit. A predetermined amount immediately before reaching the one prescribed weight is calculated based on the one prescribed weight acquired in advance, and when the measured weight of the powder reaches the calculated predetermined amount, the drive of the vibrating portion is reduced. A control unit that controls to stop driving the vibrating unit when the measured weight of the powder reaches one prescribed weight, and a packaging device that discharges and packages the powder one packet at a time from the distribution disk. Have.

The front view of the disk distribution part of the powder packaging apparatus of 1st Embodiment. The perspective view which shows the disk distribution part and the weighing part of the powder packaging apparatus of 1st Embodiment. The front view which shows the disk distribution part and the weighing part of the powder packaging apparatus of 1st Embodiment. The exploded front view of the disk distribution part and the rotation drive part of the powder packing apparatus of 1st Embodiment. The block diagram of the powder packaging apparatus of 1st Embodiment. The graph which shows the relationship between the time of the weighing part and the measured value of 1st Embodiment. The flowchart which shows the operation of the powder packing apparatus of 1st Embodiment. The plan view which shows the disk distribution part, the weighing part and the packing part of the powdered medicine packing apparatus of 2nd Embodiment. The front view which shows the disk distribution part, the weighing part and the packing part of the powdered medicine packing apparatus of 2nd Embodiment.

(First Embodiment)
Hereinafter, the powdered medicine packaging device according to the embodiment will be described with reference to the drawings.

FIG. 1 is a front view of the disk distribution portion of the present embodiment. In FIG. 1, the disk distribution unit is composed of a weighing device 10, a rotation drive unit 30 arranged above the weighing device 10, and a saucer 20 which is a powder distribution disk installed above the rotation drive unit 30. The weighing device 10 is fixed to the housing connecting portion 16 of the packaging device via the vibration absorber 14.

FIG. 2 is a perspective view of the saucer 20 removed from the disk distribution section, and FIG. 3 is a front view of the saucer 20 removed from the disk distribution section. FIG. 4 is a diagram showing a state in which the rotary drive unit 30 is disassembled and the motor 32 and the pulley 38 are moved upward from the base 31 of the rotary drive unit 30.

As shown in FIGS. 2 to 4, the base 31 of the rotation drive unit 30 is fixed to the object mounting unit 12 of the weighing device 10. As shown in the exploded view of FIG. 4, a bearing 35 is fixed to the base 31, and a pulley 38 is rotatably provided around the bearing 35. A saucer base 36 is fixed to the upper part of the pulley 38, and a saucer 20 constituting a distribution disk is detachably fixed to the upper part of the saucer base 36.

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

With such a configuration, the weighing device 10 includes the base 31 of the rotary drive unit 30 fixed to the object mounting portion 12 of the weighing device 10 and is provided on the base 31. It is possible to measure the total weight of 32, the pulley 38, the bearing 35, the saucer base 36, the saucer 20 which is a distribution disk, and the like. In other words, the weight of the tare such as the rotary drive unit 30 is measured when the powder is not supplied to the saucer 20.

Returning to FIG. 1, a powder feeder portion 60 fixed to a housing (not shown) is provided above the saucer 20. A powder storage container 61 containing powder is replaceably attached to the powder feeder unit 60. Further, the powder feeder unit 60 is provided with a vibrating unit 62 for dropping the powder from the attached powder storage container 61 onto the tray 20 little by little. The powder feeder portion 60 is fixed to the housing of the packaging device and is not a weight measurement target of the weighing device 10. Therefore, the weighing device 10 measures the total weight of the rotary drive unit 30, the saucer 20, etc. fixed to the object mounting portion 12, plus the weight of the powder supplied from the drug storage container 61 to the saucer 20. Will be done. Therefore, the weight of the powder actually supplied from the powder storage container 61 to the saucer 20 can be calculated by subtracting the weight of the tare described above from the weight measured by the weighing device 10.

When the powder is supplied from the powder storage container 61 to the saucer 20, the powder is dropped onto the saucer 20 by vibrating the powder storage container 61 by the vibrating unit 62 while rotating the saucer 20 by the motor 32. As a result, a ring-shaped pile of powdered medicine is formed on the saucer 20.

Further, reference numeral 50 denotes a scraping portion for dropping the annular powder formed on the saucer 20 onto the drop hopper 51 one by one. In the scraping portion 50, the lever 53 can be rotated up and down about the shaft 54 by the motor 52. A disc 55 is attached to the tip of the lever 53, and the motor 56 can rotate in the direction of the arrow 56a. When winding the powder on the rotating saucer 20, the lever 53 rotates counterclockwise to separate the disc 55 from the saucer 20, and when distributing the powder from the saucer 20, the lever 53 rotates clockwise to the disc 55. Is in contact with the saucer 20.

Then, as the disc 55 rotates, the powdered medicine wound on the saucer 20 is dropped one by one onto the drop hopper 51, and is housed between the folded papers 57. These scraping portions 50 are well-known techniques, and are described in, for example, Japanese Patent Application Laid-Open No. 2019-20201.

Here, the weighing device 10 is provided under the saucer 20 which is the distribution disk, and the packaging paper 57 for accommodating the powder cannot be conveyed in the horizontal direction as described in Japanese Patent Application Laid-Open No. 2019-20201. .. That is, in order to drop the powder discharged from the saucer 20 onto the drop hopper 51 and store it in the wrapping paper that is horizontally transported, it is necessary to make the drop hopper 51 vertically long. This means that the powder passes through the long falling hopper, and the amount of powder adhering to the falling hopper increases, so that the weight of the powder to be packaged may be inaccurate. In addition, since the drop hopper becomes large, the packaging device may also become large.

Therefore, as shown in FIG. 1, the packaging device 70 uses a diagonally conveyed packaging device. That is, in the horizontal transport wrapping device 70 having a roll (not shown) around which the folded paper 57 is wound, the bottom surface of the wrapping device 70 is mounted obliquely with respect to the wrapping device. ing. The packing paper 57 pulled forward from this roll is conveyed diagonally downward to the right on the entire surface side.

Then, as shown in FIG. 1, the powder distributed from the saucer 20 which is the distribution disk is dropped onto the drop hopper 51 just below the distribution disk and stored between the folded papers 57. The packaging paper 57 containing the powder is sealed one by one in the packaging device 70, transported diagonally in the lower right direction in the drawing, passes under the weighing device 10, and is accumulated in the packaging drug accumulating section 75. Will be done. In this way, by making the transport path of the packing paper 57 of the packaging device 70 diagonally transportable, even if the weighing device 10 is provided below the distribution disk, the device can be configured without increasing the size. The packing paper 57 containing the powder may be wound by a reel provided in the packing medicine accumulating portion 75, or may be transported and discharged to the outside of the machine body. Although the packaging device 70 is shown in a simplified manner in FIG. 1, it is actually configured as shown in FIG.

FIG. 5 is a block diagram of the powder packaging device. In FIG. 5, 100 is a powder packaging device, and the overall control unit 110 is connected to the prescription system 200 of the pharmacy. The packaging device 70 and the disk distribution control unit 140 of the disk distribution unit 130 are connected to the overall control unit 110. The disk distribution control unit 140 of the disk distribution unit 130 includes a first motor 32 for rotating the saucer 20, which is a distribution disk, a second motor 52 for driving a scraped disc lever, and a third motor 56 for rotating the disc. , The vibrating unit 62 and the weighing unit 10 are connected to each other.

Next, the weighing operation of the disk distribution unit configured in this way will be described with reference to FIGS. 6 and 7.

When the powder packaging operation is started, the overall control unit 110 acquires the type of powder to be prescribed and the weight information of the powder for one prescription from the prescription system 200 (ST1). The overall control unit 110 outputs the acquired weight information of the powder to the disk distribution control unit 140 of the disk distribution unit 130. After that, the disk distribution control unit 140 drives the motor 32 of the rotation drive unit 30 to rotate the saucer 20 (ST2), and the preparation for supplying the powder to the saucer 20 which is the distribution disk is completed. Then, before the powder is supplied, the weight of the tare such as the rotary drive unit 30 is measured (ST3). The weight of the tare may be subtracted from the weight measured after the powder is supplied to calculate the weight of the powder only, or the measured value of the tare may be used as a zero reference to obtain the weight of the powder only. You may. After that, the disk distribution control unit 140 drops the powder from the powder storage container 61 into the saucer 20 little by little by driving the vibrating unit 62 of the powder feeder unit 60 (ST4). While dropping the powder in this way, the weight of the powder dropped on the saucer 20 which is the distribution disk by the weighing device 10 is measured (ST5).

In the process of measuring the weight of the powder, the disk distribution control unit 140 calculates the increase value of the weight per unit time (ST6). This is because the specific gravity differs depending on the powder, and when the powder is stopped from falling, it stops at an accurate weight. That is, since it is desired to drop the powder in a short time, the amount of the powder dropped per unit time is set to a certain amount. At the end of the fall, the amount of fall per unit time is reduced by weakening the vibration intensity of the vibrating portion 62. Then, when the drop amount reaches the weight of one prescription, the vibration is stopped to obtain an accurate drop amount.

Therefore, it is necessary to weaken the vibration intensity of the vibrating portion 62 when the powder supplied to the saucer 20 reaches a predetermined amount immediately before reaching the weight of one prescription, but the specific gravity of the powder and the type of powder are powder. It is necessary to change the predetermined amount immediately before this depending on whether it is in the form of a form or in the form of granules.

It will be described with reference to FIG. 6 that the predetermined amount immediately before that is changed. FIG. 6 is a graph in which time is plotted on the horizontal axis and weight is plotted on the vertical axis. As for the increase value of the weight per unit time after the start of weighing, for example, the higher the specific gravity, the shorter the time for the weight to increase. Therefore, the predetermined amount immediately before reaching one prescription amount is slightly smaller than the one prescription amount for powdered medicine having a high specific gravity as in (2). Further, the predetermined amount (1) of the powdered drug having a low specific gravity is a value larger than that of (2). That is, it is determined that the powder having a high specific gravity reaches a predetermined amount with a weight slightly less than the weight reaching one prescribed amount, and the strength of the vibrating portion 62 is weakened as soon as possible. Further, the powder having a low specific gravity weakens the strength of the vibrating portion 62 with a weight closer to that of one prescribed amount, so that the weight of the powder supplied to the saucer 20 when the vibration is stopped at any specific gravity is the weight of one prescribed amount. It is controlled to match with. In FIG. 6, the scale signal changes as shown by the broken line because the amount of powdered powder that falls per unit time decreases as a result of weakening the intensity of the vibrating portion 62.

The predetermined amount immediately before reaching the weight of one prescription was determined by the weight increase value per unit time based on the result of measuring the weight of the powder, but the specific gravity or the specific gravity or the data of the powder to be prescribed from the prescription system 200 was obtained. Information on a predetermined amount of reducing the strength of the vibrating portion 62 may also be acquired.

Then, while supplying the powder, it is determined whether or not the measured weight of the powder has reached a predetermined value (ST7), and the weight of the supplied powder is continued until the predetermined value is reached. When the predetermined value is reached, the vibration intensity of the vibrating portion is reduced (ST8). Then, the supply of the powder is continued with a weak vibration, and when the weight of the powder reaches the weight of one prescription amount (ST9), the motor 32 of the rotary drive unit 30 is stopped and the drive of the vibration unit 62 is also stopped. (ST10). When a prescription amount of powder is supplied to the saucer 20, the saucer 20 is intermittently rotated, and the scraping unit 50 drops the powder one packet at a time onto the drop hopper 51 (ST11). The powdered powder dropped on the drop hopper 51 is sealed one by one by the packaging device 70 and accumulated in the packaged drug accumulating section 75.

According to the first embodiment configured as described above, the weight of the powder actually supplied from the powder storage container to the saucer which is the distribution disk is weighed. Therefore, since the powder that adheres to the member in the middle of supply is not measured, the accurate weight of the prescribed powder can be weighed.
(Second embodiment)
In the first embodiment, the weighing device 10 is provided in the disk distribution section to measure the weight of the distribution disk section. When two sets of such disk distribution sections are provided and powders distributed from the two sets of distribution disks are to be stored between the packaging papers by a common drop hopper, the weighing device 10 exists, so that the packaging papers are horizontal. Cannot be transported. That is, in order to store the powder between the horizontally conveyed packaging papers, the falling hopper receives the powders directly under the distribution disk, and the powders are stored in the packaging paper below the weighing device 10. This is because the falling hopper becomes long in the vertical direction, and even though the weight of the powder is accurately weighed at the distribution disk, the amount of powder adhering to the falling hopper increases, and the packaged powder The amount may be inaccurate. Therefore, in the second embodiment, two sets of disk distribution sections are provided, and the powder discharged from each of the two sets of distribution disks is received by a single drop hopper provided between the two sets of distribution disks. The packing paper is conveyed along a transport path formed diagonally from below the distribution disk of one disk distribution section to below the weighing section of the other disk distribution section. As a result, the falling hopper can be made small, and it is possible to prevent the amount of powder powder packaged in each packet from being reduced by adhering to the falling hopper.

8 and 9 show a second embodiment, FIG. 8 shows a plan view, and FIG. 9 shows a front view. In FIGS. 8 and 9, the same members as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

That is, two sets of a weighing device 10, a rotary drive unit 30, a saucer 20, which is a distribution disk, a powder feeder unit 60, and a scraping unit 50 are provided symmetrically on the left and right sides. Between the two sets of saucers 20, a single drop hopper 51 for receiving the powder discharged from the two sets of scraping portions 50 is provided.

Further, in the wrapping device 70, the horizontal transport wrapping device 70 having a roll R around which the folded paper 57 is wound is mounted so that the bottom surface of the wrapping device 70 is obliquely mounted on the wrapping device. It has become. Then, the packing paper 57 pulled forward from the roll R located at the lower part of one of the saucers 20 is carried along the packing paper transport path 71 obliquely downward at the front portion, and the lower part of the drop hopper 51 is moved. It is inserted between the packaging papers 57, and powder is stored between the packaging papers 57 from the falling hopper 51. The packing paper 57 containing the powder is further transported diagonally downward along the packing paper transport path 71, and is heat-sealed one by one by the heat-sealing portion 72. Then, after the perforations are formed in the heat-sealed portion by the perforation forming portion 73, the perforations are accumulated in the packaging powder accumulating portion 75. In addition, the packaged drug containing the drug may be wound up by a reel provided in the packaged powder collecting unit 75, or may be transported to the outside of the machine body and discharged.

As described above, according to the second embodiment, even in the case of two sets of disk distribution units provided with the weighing device, the packing paper is distributed from the lower part of the distribution disk of one disk distribution unit to the other disk distribution unit. Since the weighing device is transported along the transport path configured downward, the weight of the powder can be accurately weighed and packaged without increasing the size of the device.

Although some embodiments and modifications of the present invention have been described, these embodiments and modifications are presented as examples and are not intended to limit the scope of the invention. These novel embodiments and modifications can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

10 ... Weighing unit 20 ... Recipient (distribution disk)
30 ... Rotation drive unit 50 ... Scraping unit 51 ... Drop hopper 61 ... Powder storage container 62 ... Vibration unit 70 ... Packaging device 71 ... Packaging paper transport path 72 ...・ Seal part 73 ・ ・ ・ Perforated part 75 ・ ・ ・ Packaging powder accumulation part 130 ・ ・ ・ Disk distribution part 140 ・ ・ ・ Disk distribution control part R ・ ・ ・ Packaging paper roll

Claims (1)

A distribution disk in which powder is evenly distributed by dropping one prescription of powder near the outer circumference of the disk.
A rotary drive unit on which the distribution disk is placed and rotationally drives the distribution disk,
A powder storage container that drops powder little by little onto the rotating distribution disk and supplies it.
A vibrating unit that supplies powder from the powder storage container to the distribution disk,
The powder was supplied from the powder storage container to the distribution disk by measuring the total weight of the distribution disk excluding the powder storage container and the rotation drive unit, which was provided below the rotation drive unit. Weighing unit for measuring the weight of powder and
Based on the weight measurement result of the weighing unit, the weight increase value per unit time when the powder is supplied from the powder storage container to the distribution disk and the prescription weight obtained in advance are used to obtain one prescription weight. The predetermined amount immediately before reaching is calculated, and when the measured weight of the powder reaches the calculated predetermined amount, the vibration intensity of the vibrating part is weakened, and when the measured weight of the powder reaches one prescribed weight, the vibration. A control unit that controls the drive of the unit and
A packaging device that discharges and packages powders one by one from the distribution disk, and
Powder packaging device with.

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