JP5055920B2 - Powder distribution device - Google Patents

Description

  The present invention relates to a powder distribution device used in a powder division packaging machine that divides a powder into a prescribed amount and packages the powder.

A disk with an outer peripheral groove having an arc-shaped cross section is provided on the outer periphery so as to be able to rotate. The powder is supplied from the powder supply device to the outer peripheral groove of the rotating disk, and the powder supplied to the outer peripheral groove is removed by the powder scraping device. 2. Description of the Related Art There is known a powder divided packaging machine that scrapes one package at a time, supplies it to a packaging device, and packages each package. The powder supply apparatus includes a vibration generator that applies vibration to the trough to drop the powder into the outer circumferential groove of the disk. For example, Patent Documents 1 and 2 disclose this type of powder divided packaging machine.

  Patent Document 1 describes that the vibration applied from the vibration generator to the trough is increased step by step every time a preset time has elapsed from the start of powder supply from the powder supply device to the disk. By this control, the amount of powder supplied from the trough to the disk (the amount of powder supplied from the trough to the outer circumferential groove of the disk per unit time) increases with time. However, in this control, depending on the setting of the above-described time interval for increasing the vibration, the position where the vibration value increases concentrates at one point on the outer peripheral groove, thereby causing variations in the thickness of the powder deposited on the outer peripheral groove. If there is variation in the thickness of the powder deposited on the outer circumferential groove, when the disk is rotated at the same interval except for the first package and the final package, While the powder is scraped out by the difference, the amount of powder is reduced in the portion where the thickness of the deposit is thin, resulting in an error between packages. Further, when the position where the vibration value is increased is concentrated at one point having the outer circumferential groove, the error is amplified and the error between the packages is enlarged.

  Patent Document 2 describes that the vibration generator controls the vibration applied to the trough so that the flow rate of the powder flowing from the trough into the outer circumferential groove of the disk is constant. Specifically, a relatively strong vibration is applied from the vibration generator to the trough at the start of powder supply to the disc, and the vibration generator applies the trough to the trough as the residual amount of powder in the trough and hopper decreases. The whole quantity is supplied by controlling to reduce the vibration. However, with this control, in the case of powder that tends to flow, a large amount of powder is supplied to the outer peripheral groove at once immediately after the start of supply, leading to uneven deposition amount. On the other hand, in the case of powder that is difficult to flow, there is a problem that it takes a long time to supply all powder to the outer circumferential groove of the disk.

Japanese Patent No. 2809898 JP 2004-137051 A

  An object of the present invention is to supply powder powder uniformly and in a short time from the powder supply apparatus to the entire circumference of the outer peripheral groove of the disk in the powder distribution apparatus.

The present invention relates to a rotating body in which an annular groove is formed, a rotation driving device that rotates the rotating body , and a powder supply device that supplies powder to the groove of the rotating body that is rotating by the rotation driving device. And a powder dispensing device comprising at least a control device for controlling the operation of the powder supply device, comprising an angle detection device including a pulse counter for detecting a rotation angle of the rotating body, wherein the control device is set in advance. Storing at least one set angle, and controlling to increase the amount of powder supplied from the powder supply device to the groove when the rotation angle detected by the angle detection device reaches the set angle, A powder dispensing device is provided.

  When the rotation angle reaches a predetermined set angle, the amount of powder supplied from the medicine supply device to the groove is increased, so that the position of the groove in the circumferential direction is the powder supply position from the trough of the powder supply device. It is possible to predict in advance the position in the circumferential direction of the groove (deposition amount increasing position) where the powder supply speed sometimes increases, that is, where the amount of powder accumulation increases. Therefore, for example, when powder in a certain angle range of the groove is scraped by the scraping device and supplied to the powder packaging portion, the amount of powder supplied to the powder packaging portion by adjusting the angle range of the groove portion to be scraped at a time Can be made uniform with high accuracy. Further, by increasing the supply amount when the rotation angle reaches the set angle, the supply amount of the powder from the powder supply device to the groove portion of the disk can be quickly increased, and the time required for supplying the powder to the groove portion can be shortened.

Specifically, the setting angle, as the accumulated value becomes different positions in the circumferential direction of the groove, it is preferably set. By setting the setting angle in this way, the accumulation amount increasing positions do not overlap and are dispersed at a plurality of positions in the circumferential direction. As a result, the distribution of the accumulation amount of the powder in the circumferential direction in the groove is made uniform with high accuracy. Therefore, a desired amount of powder is accurately scraped and supplied to the powder packaging part by the above-described scraping device, and high-precision divided packaging can be realized.

  Furthermore, specifically, the set angle is an angle that is not divisible by a predetermined 360 degrees. As an alternative, it is obtained by adding or subtracting a shift value to a reference set angle which is a predetermined constant angle. This shift value is, for example, a quotient obtained by dividing 360 degrees by a natural number.

  When the supply position overlaps when the rotation angle reaches the set angle, the control device rotates the rotary body by an angle obtained by adding or subtracting a correction amount to the set angle, and then supplies powder. The amount of powder supply from the apparatus to the groove may be increased. Even when the control device executes this control, the accumulation amount increasing positions are distributed at a plurality of positions in the circumferential direction of the groove portion without overlapping, and the distribution of the accumulation amount of the powder is made uniform with high accuracy.

The powder supply device includes, for example, a hopper into which powder is charged, a trough provided at a lower portion of the hopper, and a vibration generator that applies vibration to the trough to drop the powder into the groove of the rotating body . In this case, the control device increases the strength of the vibration applied to the trough by the vibration generating device when the rotation angle reaches the set angle.

  The hopper of the powder supply device may be supported such that a gap at a position where the trough and the hopper face each other can be increased or decreased, and the powder supply device may further include a gap adjustment device that increases or decreases the gap. In this case, the control device increases the gap when the cumulative rotation angle reaches a set angle.

  The angle detection device may be an encoder or may count the number of drive pulses supplied to the pulse motor.

An input device for manually inputting a plurality of set angles to the control device;
The control device checks the set angle input from the input device, and prohibits the input if the input set angles overlap.

  According to the powder distribution device of the present invention, the powder in the circumferential direction of the annular groove is increased by increasing the supply amount from the powder supply device to the groove each time the cumulative rotation angle of the rotating body reaches a predetermined set angle. It is possible to predict in advance the position where the amount of deposition increases. Moreover, by increasing the supply amount when the cumulative rotation angle reaches the set speed, the supply amount of the powder from the powder supply device to the groove of the disk can be quickly increased, and the time required for supplying the powder to the groove can be shortened. .

  In particular, if there are a plurality of cumulative rotation angles that reach the set angle, and the supply positions at the individual cumulative rotation angles that have reached the set angle are set at different positions in the circumferential direction of the groove, the accumulation amount increasing positions do not overlap. Dispersed in the circumferential position of the groove. As a result, the distribution of the amount of powder deposited in the circumferential direction of the annular groove is made uniform with high accuracy.

  Next, an embodiment of the present invention shown in the drawings will be described in detail.

(First embodiment)
Referring to FIG. 1 to FIG. 3, the powder divided packaging device 1 includes a powder distribution unit 2 and a powder packaging unit 3. The powder distribution unit 2 is provided on the table 6 of the apparatus main body 5 that is releasably covered with the upper cover 4, and the first and second disks (rotating bodies) 7A and 7B, the powder supply devices 8A and 8B, and the scratches. Each of the dispensing devices 9 is arranged. In FIG. 2, the scraping device 9 is omitted. The disks 7A and 7B, the powder supply devices 8A and 8B, and the control device 72 described later constitute the powder distribution device in the present invention.

The disks 7A and 7B are driven to rotate around the shaft hole 7a by pulse motors 11A and 11B, respectively. Drive pulses are supplied from the drive circuits 71A and 71B (see FIG. 7) to the individual pulse motors 11A and 11B. The disks 7A and 7B are provided with an outer peripheral groove (so-called R groove) 10 having an arc cross section. Powder is supplied from the corresponding powder supply devices 8A and 8B to the outer circumferential groove 10 in a state where the disks 7A and 7B are rotating. Since the first disk 7A is provided at a position slightly higher than the second disk 7B, the outer peripheral portions of both are partially overlapped in plan view. A cleaning device for cleaning the outer peripheral grooves 10 of the disks 7A and 7B is provided on the table 6 , but is omitted in FIGS.

  The scraping device 9 is disposed at the center of each of the disks 7A and 7B. Each scraping device 9 scrapes the powder supplied to the outer peripheral groove 10 by the powder supply devices 8A and 8B one by one and drops it to the powder packaging part 2.

  The powder packaging part 3 is provided with the conveying apparatus, the hopper member, and the sealing device. The conveying device automatically conveys the wrapping paper wound around the roll. Powder is supplied from the hopper member to the wrapping paper transported by the transport device. After the powder is supplied to the wrapping paper, a sealing device heat seals the wrapping paper.

  Next, the powder supply devices 8A and 8B will be described with reference to FIGS. Since the powder supply devices 8A and 8B have the same structure, the powder supply device 8A will be described unless otherwise specified. The powder supply device 8A is a trough to which powder is supplied from a hopper 21 into which powder is charged and a hopper 21 on a machine base 20 arranged on a table 6 (see FIGS. 2 and 3) of the powder division packaging device 1. 22 is provided.

  The hopper 21 is detachably attached to a hopper support frame 23a of the hopper support portion 23. The hopper support portion 23 includes a support arm 23b extending downward from the hopper support frame 23a. The support arm 23 b is connected to a pedestal portion 25 fixed on the machine base 20 via a horizontal rotation shaft 27. Therefore, the hopper 21 can swing in the vertical direction with the rotation shaft 27 as a fulcrum.

  An auxiliary arm 23c for swing driving is provided on the front side of the hopper support 23. A cam follower 29 is attached to the lower end side of the auxiliary arm 23c. On the other hand, an angle control motor 33 having a hopper angle adjusting cam 31 fixed to a rotating shaft 33a is fixed on the machine base 20. Since the cam follower 29 follows the posture change of the cam 31, the angle of the hopper 21 changes around the rotation shaft 27 according to the rotation angle position of the rotation shaft 33 a of the angle control motor (gap adjusting device) 33.

  When the hopper 21 rotates in the direction of the arrow A1 (clockwise) in FIG. 4, the gap between the lower end of the regulating member 28 disposed in front of the lower end opening 21b of the hopper 21 and the bottom of the trough 22 is narrowed, and the trough 22 The thickness of the powder moving up is reduced. Conversely, when the hopper 21 rotates in the direction of arrow A2 (counterclockwise) in FIG. 4, the gap between the lower end of the regulating member 28 and the bottom of the trough 22 widens, and the thickness of the powder moving on the trough 22 increases. To do. Further, by adjusting the gap between the lower end of the regulating member 28 and the bottom of the trough 22, the amount of powder supply from the trough 22 to the outer peripheral groove 10 of the disk 7A (per trough 22 to the outer peripheral groove 10 of the disk 7A per unit time). Can adjust the amount of powder supplied). Specifically, if the gap between the lower end of the regulating member 28 and the bottom of the trough 22 is widened, the amount of powder supplied from the trough 22 to the outer circumferential groove 10 increases, and the gap between the lower end of the regulating member 28 and the bottom of the trough 22 is increased. If narrows, the supply amount of powder from the trough 22 to the outer peripheral groove 10 decreases.

  The powder supply device 8 </ b> A is provided with an angle detection device 34 for detecting the angle of the hopper 21 around the rotation shaft 27. The angle detection device 34 includes a detected part 36 and a Hall element 37. The detected portion 36 is fixed to the rotation shaft 33 a of the angle control motor 33. A plurality of magnets 35 are attached to the outer periphery of the detected part 36 at regular intervals. By detecting the magnetic force generated by the magnet 35 with the hall element 37, the rotational angle position of the rotating shaft 33a is detected.

  Further, the powder supply device 8A is provided with a hopper striking mechanism 38 for applying an impact to the hopper 21 intermittently. The hopper impact mechanism 38 includes a solenoid 39 and a hopper impact member 40. The proximal end side of the hopper striking member 40 is fixed to the output shaft 39 a of the solenoid 39. When the solenoid 39 is actuated, the tip of the hopper striking member 40 collides with the side of the hopper 21 to apply an impact.

  The trough 22 is disposed so as to extend in the horizontal direction below the hopper 21, and its tip 22 a is bent downward. The trough 22 is fixed to the trough support member 41 with screws. A weight member 42 is fixed to the bottom of the trough support member 41. The trough support member 41 is connected to the piezoelectric elements 14A and 14B. The other end portions of the piezoelectric elements 14 </ b> A and 14 </ b> B are connected to the fixed block 46. Further, the fixed block 46 is fixed to the bracket 45. The bracket 45 is connected to the machine base 20 via four springs 44. When a voltage is applied to the piezoelectric elements 14 </ b> A and 14 </ b> B to expand and contract in the thickness direction, vibration in the front-rear direction is applied to the trough 22 via the trough support member 41. In order to detect the vibration intensity applied to the trough 22, that is, the vibration output of the piezoelectric elements 14A and 14B, a vibration sensor 48 is disposed on the bracket 45. Further, a balancer 49 is secured to the rear end side of the bracket 45 for balancing the back-and-forth movement of the bracket 45 when the piezoelectric elements 14A and 14B are driven.

  As described above, a gap is provided between the lower end opening 21 b of the hopper 21 and the trough 22, and the powder charged into the hopper 21 from the upper end opening 21 a is supplied onto the trough 22 from this gap. . The powder supplied to the trough 22 moves on the trough 22 toward the tip 22a by vibration applied to the trough 22 from the piezoelectric elements 14A and 14B, and falls from the tip 22a to the outer peripheral groove 10 of the disk 7A. The powder supply device 8A is provided with a reflective powder drop detection sensor 50 for detecting the presence or absence of the powder falling from the trough 22 to the disk 7A.

  Referring to FIG. 7, the control device 72 of the powder divided packaging apparatus 1 includes a storage unit 73 and a processing unit 74. The storage unit 73 stores information necessary for control. In accordance with the information stored in the storage unit 73, the processing unit 74 is configured to output solenoids 39, according to inputs from various sensors including the vibration sensor 48, the powder drop detection sensor 50, the angle detection device 34, and the drive circuits 71 </ b> A and 71 </ b> B. The operations of the angle control motor 33, the piezoelectric elements 14A and 14B, the pulse motors 11A and 11B, the scraping device 9 and the like are controlled. Necessary information can be input to the storage unit 73 of the control device 72 through the operation panel (input device) 16. The control device 72 is connected to a personal computer 75 for transmitting / receiving prescription data.

  Hereinafter, the control of the amount of powder supplied from the powder supply device 8A to the outer peripheral groove 10 of the disk 7A executed by the control device 72 will be described in detail.

  The control device 72 monitors the accumulated value (accumulated rotation angle) RAac of the rotation angle up to the current time after the disk 7A driven by the pulse motor 11A starts rotating. Further, the control device 72 controls the supply amount of the powder from the powder supply device 8A to the outer peripheral groove 10 by using this cumulative rotation angle RAac. The cumulative angle RAac can be detected by counting the number of drive pulses supplied from the drive circuit 71A to the pulse motor 11A. For example, when the disk 7A is rotated 30 times with 300,000 drive pulses, 10,000 drive pulses are one rotation of the disk 7A (cumulative rotation angle RAac is 360 degrees), and 15,000 drive pulses are those of the disk 7A. 1 rotation and 180 degrees (cumulative rotation angle RAac is 540 degrees) 150,000 drive pulses are 15 rotations (cumulative rotation angle RAac is 5400 degrees), 155,000 drive pulses are 15 rotations and 180 degrees (cumulative rotation angle) RAac is 5580 degrees). Further, an encoder 76 (see FIG. 7) for detecting the rotation angle of the disk 7A may be provided, and the cumulative rotation angle RAac may be detected by the encoder 76. Further, the drive pulse counting and the encoder 76 may be used in combination. The form of the angle detection device for detecting the cumulative rotation angle RAac of the disk 7A is not particularly limited, and includes at least one having a pulse counter.

  In addition, the control device 72 increases the voltage applied to the piezoelectric elements 14A and 14B by a certain amount each time the cumulative rotation angle RAac reaches a preset set angle RAs stored in the storage unit 73. The intensity of vibration applied to the trough 22 from the elements 14A and 14B is increased. As the vibration intensity increases, the amount of powder supplied from the trough 22 to the disk 8A increases accordingly.

  The set angle RAs is set so that the tip position of the trough 22 when the cumulative rotation angle RAac reaches each set angle RAs, that is, the supply position of the powder from the powder supply device 8A to the outer peripheral groove 10 does not overlap each other. ing. That is, the set angle RAs is set such that the tip position of the trough 22 is at least about ± 2 degrees apart when the cumulative rotation angle RAac reaches each set angle RAs. By setting the setting angle RAs in this manner, the circumferential position (deposition amount increasing position) of the outer circumferential groove 10 where the accumulation amount of powdered powder increases is not overlapped. As a result, the distribution of the accumulation amount of the powder in the circumferential direction in the outer circumferential groove 10 is made uniform with high accuracy. By uniformizing the distribution of the accumulation amount with high accuracy, a specified amount of powder can be scraped out accurately by the scraping device 9 and supplied to the powder packaging part 2, thereby realizing high-precision divided packaging. Further, by increasing the supply amount each time the cumulative rotation angle RAac reaches the set angle RAs, it is possible to shorten the time for the dispensing step of dropping the powder from the powder supply device 8A to the outer peripheral groove 10 of the disk 7A.

  As described above, in order not to overlap the accumulation amount increasing position (dispersing in the circumferential direction of the outer circumferential groove 10 as much as possible), the supply position when the cumulative rotation angle RAac reaches the set angle RAs does not overlap ((possible The setting angle RAs for realizing this can be variously set, for example, in the present embodiment, the setting angle RAs is determined in advance. The angle is not divisible by 360. Table 1 below shows the set angle RAs of this embodiment.

  In Table 1, levels 1 to 5 indicate that the change spans per time for increasing the vibration intensity with respect to the increase in the cumulative rotation angle RAac are different. Normally, the rotation speed of the disk 7A is about 28 rotations per minute, but since the value of the set angle RAs is 415 degrees at level 1, the vibration value increases every time the cumulative rotation angle RAac of 415 degrees is detected. However, in level 5, since the value of the set angle RAs is 289 degrees, the vibration value is increased every time the cumulative rotation angle RAac of 289 degrees is detected. That is, when comparing the two, level 1 has a long interval of cumulative rotation angle RAac, so the time span for changing vibration is also long, and level 5 has a short interval of cumulative rotation angle RAac, so the time span is also long. The time interval for controlling the vibration is shorter than level 1. That is, the increase in the vibration intensity with respect to the increase in the cumulative rotation angle RAac becomes faster in the order from level 5 to level 1. The setting angles RAs of 415 degrees, 393 degrees, 327 degrees, 305 degrees, and 289 degrees from level 1 to level 5 are set so as not to overlap on the outer peripheral groove 10 as much as possible when they are multiplied by natural numbers. ing. The set angle RAs is not limited to that in Table 1, and the level 1 to level 5 may be set to 480 degrees, 420 degrees, 390 degrees, 330 degrees, and 300 degrees, for example.

  In the present embodiment, the vibration intensity is increased every time the relationship of the following formula (1) is established.

  In FIG. 8A, P0 indicates the supply position at the start of rotation of the disk 8A, and P1 to P20 are at individual set angles RAs from N = 1 to N = 20 at level 1 (set angle RAs is 415 degrees). The change in supply position is shown. Similarly, in FIG. 8B, P1 to P20 indicate changes in the supply position at individual set angles RAs from N = 1 to N = 20 at level 5 (set angle RAs is 289 degrees).

  FIG. 9 shows relative values of vibration intensity until the cumulative rotation angle RAac reaches the setting angle RAs of N = 5 for level 1 (setting angle RAs is 415 degrees) and level 5 (setting angle RAs is 289 degrees). . In both level 1 and level 5, the vibration intensity increases by a constant amount (indicated by the symbol δ) at regular intervals. The ratio of the increase in the vibration intensity to the increase in the cumulative rotation angle RAac is higher at level 5 than at level 1. FIG. 10 shows the increase in vibration output from level 1 to level 5 for a wider range of cumulative rotation angles RAac. As shown in FIG. 10, the initial value of the vibration intensity is set stronger in the order from level 5 to level 1. Further, in FIG. 10, symbol α indicates an upper limit value of vibration intensity. FIG. 11 shows the relationship between the increase in the cumulative rotation angle from level 1 to level 5 and the total amount (flow rate) of powder supplied from the powder supply device 8A to the outer peripheral groove 10.

  The PC 60 receives the weight data of the powder to be packaged from the audit system 77 and determines which of the above-mentioned level 1 to level 5 is selected based on the received weight data, and the control device 72 determines the powder supply device 8A according to the determined level. The powder supply may be executed. In this case, as shown in Table 2 below, the PC 60 stores a flow coefficient (an index of vibration necessary to convey the powder) determined by the type of powder, and a relationship between the weight and the level.

  The level is set to a larger value as the weight is heavier and the flow coefficient is larger (the powder is harder to flow). The flow coefficient indicates that strong vibration needs to be applied as the value increases. For example, when the weight is 1 (0g or more and 5g or less) and the flow count is "1", level 1 is selected, whereas when the weight is 5 (above 100g) and the flow count is "5", the level is selected. 5 is selected. When the type of the drug is unknown, the flow coefficient of level 1 indicating the weakest vibration is used. Moreover, when a plurality of medicines are mixed, the weakest one of the flow coefficients is used. Furthermore, when there is no weight data, the weight 1 corresponding to the minimum amount is used.

  The set angle RAs can be manually input on the operation panel 16. The control device 72 compares the set angle RAs newly input on the operation panel 16 with the set angle RAs already input. If the newly input set angle RAs overlaps the already input set angle RAs, the control device 72 prohibits the input of the newly input set angle RAs to the storage unit 73. Further, the control device 72 may not only prohibit the input but also display the operation panel 16 with the input impossible or the set angle RAs that can be input.

  The control device 72 detects the start of powder supply from the powder supply device 8A to the outer peripheral groove 10 in the following procedure.

  For example, when a crushed tablet such as a sugar-coated tablet is packaged, and when the crushed drug is difficult to flow, the shell itself is detected by the powder drop sensor 60, so that the drug itself is completely removed from the trough 22 to the outer circumferential groove. There is a possibility that it may be determined that the supply of the medicine from the powder supply device 8A to the outer peripheral groove 10 has been started in spite of the state that the medicine is not supplied to the powder. In order to avoid such a determination error, it is indicated that the powder drop sensor 50 is continuously turned on (a state in which the drop of the drug from the trough is detected) continuously for a predetermined sufficient time (for example, 2 seconds). It is determined that the supply of is started. In addition, when the state of the powder drop detection sensor 50 changes as shown in FIG. 12, if there is an off state of 40 ms or more between the on state and the on state as indicated by reference symbol B, the time duration of the on state is reset. To do. Then, it is determined that the supply of the medicine is started when the ON state is continued for 2 seconds without interruption at time t. However, depending on the type of powder, since powder may flow intermittently at the start of supply, this process is limited to 60 seconds from the start of distribution, and thereafter, the powder drop is detected continuously for a certain time (for example, 40 ms). If the sensor 50 is turned on, it is determined that the medicine supply has been started.

(Second Embodiment)
The second embodiment is different from the first embodiment only in how to determine the set angle RAs. That is, in the present embodiment, various values of the shift value RAc are added to the reference set angle RAsta, which is a predetermined constant angle, and used as the set angle RAs. The following equation (2) shows the relationship between the set angle RAs, the reference set angle RAsta, and the shift value RAc. A value obtained by subtracting the shift value RAc from the reference set angle RAsta may be used as the set angle RAs.

RAs = RAsta + RAc

  Hereinafter, an example of the set angle RAs will be described. Note that the increase in vibration intensity is made a fixed amount (symbol δ) in the same manner as in the first embodiment.

  The reference setting angles RAsta from level 1 to level 5 are 300 degrees, 330 degrees, 390 degrees, 420 degrees, and 510 degrees, respectively. The shift value RAc is a natural number multiple of the quotient (5.625 degrees) obtained by dividing 360 degrees by 64. Tables 3 and 4 below show the shift value RAc, the set value RAs, and the integrated value of the set value RAs for No. 1 to 63 (the increase in vibration intensity from the first to the 64th) from level 1 to level 5. .

Referring to FIG. 1 to No. The shift values RAc1 to RAc8 up to 8 use eight angular positions (0 degrees, 45 degrees, 90 degrees, 135 degrees, 180 degrees, 225 degrees, 270 degrees, 315 degrees) obtained by dividing 360 degrees into eight. Further, the shift value RAc1 is 360 degrees while the shift value RAc2 is 180 degrees, the shift value RAc3 is 90 degrees, the shift value RAc4 is 270 degrees, and the shift value RAc is the rotation center. They are arranged symmetrically with respect to O. Further, referring to FIG. 9 to No. The shift values RAc9 to RAc16 up to 16 are eight angular positions (22.5 degrees, 67.5 degrees, 112, excluding the angular positions used as the shift values RAc1 to RAc8 among the angular positions obtained by dividing 360 degrees into 16 parts. .5 degrees, 157.5 degrees, 202.5 degrees, 247.5 degrees, 292.5 degrees, and 337.5 degrees). Similarly to the shift values RAc1 to RAc8 (FIG. 13A), the correction values RAc9 to RAc16 are also arranged at positions symmetrical with respect to the rotation center O. Further, referring to FIG. 17 to No. The displacement values RAc17 to RAc32 up to 32 are obtained by removing 16 angular positions (angular positions used as displacement values RAc1 to RAc16) obtained by dividing 360 degrees into 32 and 360 degrees from 8 and 16 parts. Use angular position. The shift values RAc17 to RAc32 are also arranged at positions symmetrical with respect to the rotation center O. Furthermore, referring to FIG. 33 to No. The shift values RAc33 to RAc63 up to 63 are 32 angular positions (angular positions used as the shift values RAc1 to RAc32) from the angular position obtained by dividing 360 degrees into 64 parts by dividing 360 degrees into 8 parts, 16 parts, and 32 parts. The 31 angular positions excluded are used. The shift values RAc33 to RAc34 are also arranged at positions symmetrical with respect to the rotation center O.

  As described above, the shift values RAc33 to RAc63 are arranged so as to be distributed so that the circumferential positions of the outer circumferential grooves 10 of the disk 7A do not overlap, so that the cumulative rotation angle RAac reaches the respective set values RAs. Supply positions will not overlap. As a result, the circumferential position (deposition amount increasing position) of the outer circumferential groove 10 where the accumulation amount of the powder is increased does not overlap, and the distribution of the accumulation amount of the circumferential powder in the outer groove 10 is made uniform with high accuracy. The By uniformizing the distribution of the accumulation amount with high accuracy, a specified amount of powder can be scraped out accurately by the scraping device 9 and supplied to the powder packaging part 2, thereby realizing high-precision divided packaging. Further, by increasing the supply amount each time the cumulative rotation angle RAac reaches the set angle RAs, it is possible to shorten the time for the dispensing step of dropping the powder from the powder supply device 8A to the outer peripheral groove 10 of the disk 7A.

  FIG. 14 shows relative values of vibration intensity with respect to the cumulative rotation angle RAac for level 1 (reference setting angle RAsta is 510 degrees) and level 5 (reference setting angle RAsta is 300 degrees). For each of the levels 1 and 5, every time the cumulative rotation angle RAac reaches the set value RAs (each time the cumulative rotation angle RAac becomes equal to the cumulative addition value of the set value RAs), a certain amount (indicated by the symbol δ). The vibration intensity is increasing. The ratio of the increase in the vibration intensity to the increase in the cumulative rotation angle RAac is higher at level 5 than at level 1. The increase in vibration output for a wider range of cumulative rotation angle RAac and the relationship between the increase in cumulative rotation angle and the total amount (flow rate) of powder supplied from the powder supply device 8A to the outer peripheral groove 10 are the same as in the first embodiment. (See FIGS. 10 and 11).

(Third embodiment)
The third embodiment differs from the first embodiment in how to determine the set angle RAs. As shown in Table 5 and Table 6 below, in this embodiment, the shift value RAc, which is a natural number multiple of 360 degrees divided into 64 (5.625 degrees), is used as the set angle RAs. Further, in the present embodiment, by varying the increment of the vibration intensity applied from the piezoelectric elements 14A and 14B to the trough 22 when the cumulative rotation angle RAac reaches the set angle RAs, the vibration intensity with respect to the cumulative rotation angle RAac is changed. There are five levels of increase. That is, every time the cumulative rotation angle RAac reaches the set angle RAs for each of the levels 1 to 5, the applied voltage to the piezoelectric elements 14A and 14B is increased by 1 kV, 1.5 kV, 2 kV, 2.5 kV, and 3 kV.

  The relationship between the increase in the vibration output with respect to the cumulative rotation angle RAac and the increase in the cumulative rotation angle and the total amount (flow rate) of the powder supplied from the powder supply device 8A to the outer peripheral groove 10 is the same as in the first embodiment (FIG. 10 and FIG. 11).

(Fourth embodiment)
In the first to third embodiments, the intensity of vibration applied from the piezoelectric elements 14A, 14B to the trough 22 is controlled by changing the voltage applied to the piezoelectric elements 14A, 14B. The supply amount of powder to the disk 8A is changed. However, not only the voltage applied to the piezoelectric elements 14A and 14B, but also the angle of the hopper 22 may be changed to adjust the amount of powder supplied from the hopper 22 to the trough 22. Specifically, the control device 72 is rotated by the angle control motor 33 so that the gap between the lower end of the regulating member 28 of the hopper 22 and the bottom of the trough 22 is widened every time the cumulative rotation angle RAac reaches the set angle Ras. The angle of the hopper 22 around the moving shaft 27 may be changed. As described above, when the hopper 21 rotates in the direction of the arrow A1, the amount of powder supplied from the trough 22 to the disk 8A increases. When the hopper 21 rotates in the direction of arrow A2, the amount of powder supplied from the trough 22 to the disk 8A increases. Decrease. Note that both the voltage applied to the piezoelectric elements 14A and 14B and the angle of the hopper 22 may be adjusted.

(Fifth embodiment)
In the first to third embodiments, the set angle RAs is determined so that the set angle RAs does not overlap on the outer circumferential groove 10 as much as possible. However, even if the set angle RAs can be set to an arbitrary value on the operation panel 16 and the position for increasing the supply amount from the powder supply device 8A to the outer peripheral groove 10 is shifted only when the set angle RAs overlaps, the position can be shifted. Good. For example, the control device 72 sets the disk 7A when the supply position when the cumulative rotation angle RAac reaches the set angle RAs overlaps with the supply position when the cumulative rotation angle RAac reaches the set angle RAs before that. After further rotation by an angle obtained by adding or subtracting a correction amount (for example, about 5 degrees) to the angle RAs, the supply amount of the powder from the powder supply device 8A to the outer peripheral groove 10 is increased. Even when the control device 72 performs the control as described above, the time required for supplying the powder to the outer circumferential groove 10 can be shortened while uniforming the distribution of the powder accumulation amount in the circumferential direction of the outer circumferential groove 10 with high accuracy.

The perspective view which shows the external appearance of the powder division packaging machine which concerns on embodiment of this invention. The perspective view which shows the powder distribution part of the powder division packaging machine of FIG. The perspective view which shows the powder distribution part of the powder division packaging machine of FIG. The left view which shows a powder supply apparatus. The front view which shows a powder supply apparatus. The top view which shows a powder supply apparatus. The schematic diagram which shows the control apparatus of a powder division packaging machine, and the element relevant to it. The typical top view showing the supply position in each set angle RAs in a 1st embodiment (reference set angle RAsta is 415 degrees). The typical top view showing the supply position in each set angle RAs in a 1st embodiment (reference set angle RAsta is 289 degrees). The diagram which shows the relationship between the cumulative rotation angle and vibration intensity in 1st Embodiment. The diagram which shows the relationship between the cumulative rotation angle and vibration intensity in 1st Embodiment. The diagram which shows the relationship between the cumulative rotation angle and flow volume in 1st Embodiment. The diagram which shows the state of the powder fall detection sensor immediately after a vibration application start. FIG. 10 is a schematic plan view showing a distribution of correction values RAc1 to RAc8 in the second embodiment. FIG. 10 is a schematic plan view showing a distribution of shift values RAc9 to RAc16 in the second embodiment. FIG. 10 is a schematic plan view showing a distribution of shift values RAc17 to RAc32 in the second embodiment. FIG. 10 is a schematic plan view showing a distribution of shift values RAc33 to RAc63 in the second embodiment. The diagram which shows the relationship between the cumulative rotation angle and vibration intensity in 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Powder distribution part 2 Powder packaging part 3 Opening / closing door 5 Apparatus main body 6 Table 7A, 7B Disk 8A, 8B Powder supply apparatus 9 Scraping device 10 Outer peripheral groove 11A, 11B Pulse motor 14A, 14B Piezoelectric element 16 Operation panel 20 Machine base 21 Hopper 21a Upper end opening 21b Lower end opening 22 Trough 22a Tip 23 Hopper support portion 23a Hopper support frame 23b Support arm 23c Auxiliary arm 25 Base portion 27 Rotating shaft 29 Cam follower 31 Cam 33 Angle control motor 33a Rotating shaft 34 Angle detection device 35 Magnet 36 Detected part 37 Hall element 38 Hopper impact mechanism 39 Solenoid 39a Output shaft 40 Hopper impact member 41 Trough support member 42 Weight member 44 Spring 45 Bracket 46 Fixed block 48 Vibration sensor 49 Balancer 50 Powder fall detection sensor 51 A, 51B, 51C, 51D D / A converter 52A, 52B, 52C A / D converter 60 Personal computer 61 Fixed block 71A, 71B Drive circuit 72 Control device 73 Storage unit 74 Processing unit 75 Input device 76 Encoder 77 Audit system

Claims (12)

A rotating body formed with an annular groove;
A rotation driving device for rotating the rotating body;
A powder supply device for supplying powder to the groove of the rotating body being rotated by the rotation driving device;
A powder dispensing device comprising at least a control device for controlling the operation of the powder supply device;
An angle detection device including a pulse counter for detecting the rotation angle of the rotating body;
The control device stores at least one preset angle set in advance, and increases the supply amount of powder from the powder supply device to the groove when the rotation angle detected by the angle detection device reaches the set angle. A powder dispensing apparatus characterized by controlling. The setting angle is, as the accumulated value becomes different positions in the circumferential direction of the groove, is set, the powdered medicine dispensing device of claim 1.   The powder distribution device according to claim 2, wherein the set angle is an angle that is not divisible by a predetermined 360 degrees.   The powder distribution device according to claim 2, wherein the set angle is obtained by adding or subtracting a shift value with respect to a reference set angle that is a predetermined constant angle.   The powder distribution device according to claim 4, wherein the shift value is a quotient obtained by dividing 360 degrees by a natural number.   When the supply position overlaps when the rotation angle reaches the set angle, the control device rotates the rotary body by an angle obtained by adding or subtracting a correction amount to the set angle, and then supplies powder. 2. The powder dispensing device according to claim 1, wherein the powder supply amount from the device to the groove is increased. The said control apparatus changes the said setting angle according to the coefficient determined by the kind of powder and the weight of powder, The powder distribution apparatus of any one of Claim 1 to 6 characterized by the above-mentioned. The powder supply device is
A hopper into which powder is charged,
A trough at the bottom of the hopper,
A vibration generator that applies vibrations to the trough to drop the powder into the groove of the rotating body ,
The powder distribution device according to any one of claims 1 to 7 , wherein the control device increases the strength of vibration applied to the trough by the vibration generator when the rotation angle reaches a set angle. . The hopper of the powder supply device is supported so that the gap at the position where the trough and the hopper face each other can be increased or decreased,
The powder supply device further includes a gap adjusting device that increases or decreases the gap,
The powder distribution device according to any one of claims 1 to 8 , wherein the control device increases the gap when a cumulative rotation angle reaches a set angle. The powder distribution device according to any one of claims 1 to 9 , wherein the angle detection device is an encoder. The rotational drive device is a pulse motor;
Before SL ANGLE detector characterized by counting the driving speed dynamic pulse that is supplied to the pulse motor, the powdered medicine dispensing device according to any one of claims 1 to 9. An input device for manually inputting a plurality of set angles to the control device;
The controller checks the setting angle input from the input device, if the input setting angle if a duplicate claim 1, characterized in that prohibiting the input to any one of claims 11 The powder distribution device described.

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