JP5947940B2 - Drug supply device - Google Patents

Description

  The present invention relates to a medicine supply device for supplying medicine to a container.

  2. Description of the Related Art Conventionally, in a dispensing pharmacy or the like, a liquid medicine that is a liquid medicine has been dispensed. In the preparation of a chemical solution, a plurality of chemical solutions are injected into a medication bottle according to a prescription. Patent Document 1 discloses a dispensing device that dispenses chemical liquids from a plurality of chemical liquid bottles to a prescription bottle. This dispensing device sucks a chemical solution from a chemical solution bottle with a pipette tip, and supplies the chemical solution from the pipette tip to a prescription bottle. When supplying the drug solution from the pipette tip to the medication bottle, the weight of the drug solution supplied to the medication bottle is detected by an electronic balance.

JP 2007-14463 A

In the technique of Patent Document 1, the weight value detected by the electronic balance is used for managing the usage history of the chemical bottle, but is not used for controlling the supply of the chemical liquid. Such a technique has a problem that the supply accuracy of the chemical solution is low.
When the supply of the chemical solution is controlled using the detected weight value, the supply accuracy of the chemical solution is improved as compared with the technique of Patent Document 1. However, the detected weight value is unstable during the supply of the chemical solution, and therefore the accuracy required for the supply of the chemical solution cannot be achieved.
Such a problem occurs not only in the supply of a chemical solution but also in the supply of a solid drug.

  The objective of this invention is providing the chemical | medical agent supply apparatus which can improve the supply precision of a chemical | medical agent.

The present invention is based on input means for inputting prescription information, medicine supply means for supplying a liquid or solid medicine to a container, weight detection means for detecting the weight of the medicine contained in the container, and the prescription information Control means for controlling the medicine supply means so as to supply the medicine based on a target weight value and a detected weight value detected by the weight detection means, and the control means is based on the target weight value. determine the even smaller intermediate target weight value, when the detected weight value exceeds the intermediate target weight value during the supply of the drug was given a drug feeder you temporarily limit the supply of drugs.

Further, when the detected weight value exceeding the intermediate target weight value is given during the supply of the medicine, the control means temporarily restricts the supply of the medicine, and thereafter, the target weight value, the detected weight value, It is also possible to control the medicine supply means so as to supply medicine based on the above.

It is a front view which shows the chemical | medical solution supply apparatus 1 of one Embodiment of this invention. It is sectional drawing seen from the cut surface line AA of FIG. It is sectional drawing seen from the cut surface line BB of FIG. 2 is a block diagram showing an electrical configuration of the chemical liquid supply apparatus 1. FIG. It is a figure which shows the relationship of each value used for the chemical | medical solution supply operation | movement by the control means. It is a graph which shows the relationship between the insufficient weight value with respect to an intermediate | middle target weight value, and a pump rotational speed. 3 is a flowchart for explaining a chemical solution supply operation by a control means 5; 4 is a flowchart for explaining a stable weight value acquisition operation by the control means 5; 4 is a flowchart for explaining a pump rotation speed changing operation by the control means 5; 3 is a flowchart for explaining a micro supply operation by a control means 5; It is a graph which shows an example of the time change of a detected weight value.

  FIG. 1 is a front view showing a chemical liquid supply apparatus 1 according to an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the section line AA of FIG. FIG. 3 is a cross-sectional view taken along the section line BB in FIG. The chemical solution supply apparatus 1 according to the present embodiment is used to supply a liquid drug (hereinafter referred to as “medical solution”) to a prescription bottle 2 that is a container.

  The chemical solution supply device 1 which is a drug supply device is detected by a chemical solution supply unit 3 for supplying a chemical solution to the prescription bottle 2, a weight detection unit 4 for detecting the weight of the chemical solution stored in the prescription bottle 2, and a weight detection unit 4. And a control means 5 for controlling the chemical solution supply means 3 based on the detected weight value. Each of these means 3, 4, 5 is provided in the housing 6. The casing 6 is formed in a rectangular parallelepiped shape, and is installed on a horizontal installation surface 7 in an upright state.

  A support frame 8 is provided inside the housing 6. The support frame 8 is disposed between the bottom plate 9 of the housing 6 and the top plate 10 of the housing 6, and specifically is disposed near the top plate 10 of the housing 6. The internal space of the housing 6 is partitioned by the support frame 8 into an upper space 11 above the support frame 8 and a lower space 12 below the support frame 8. An upper opening 14 connected to the upper space 11 and a lower opening 15 connected to the lower space 12 are formed in the front surface portion 13 of the housing 6. The lower opening 15 is formed so as to extend vertically between the left and right side portions 16 a and 16 b in the front surface portion 13 of the housing 6.

  The chemical solution supply means 3, which is a chemical supply means, is disposed in the lower space 12, and is provided with a drum 21 that is rotatable about an axis L 1 perpendicular to the support frame 8 (hereinafter referred to as “drum axis”), and a drum 21. A drum rotation motor 22 that rotates the support frame 8 around the drum axis L1, a plurality of pumps 24 that are provided on the drum 21 and that transfer a chemical solution from the plurality of chemical solution bottles 23 to the prescription bottle 2, and each pump 24 and a pump drive unit 25 for driving 24. Each chemical solution bottle 23 contains different chemical solutions. In the present embodiment, there are ten chemical bottles 23 and ten pumps 24.

  A ring member 27 coaxial with the drum axis L1 is fixed to the upper end portion 26 of the drum 21. Three or more support members 28 that support the ring member 27 are provided on the outer periphery of the ring member 27. The support members 28 are arranged at equal intervals in the circumferential direction around the drum axis L1 (hereinafter referred to as “drum circumferential direction”).

  Each support member 28 is provided to be rotatable about an axis parallel to the drum axis L <b> 1 with respect to the support frame 8. On the outer peripheral portion of each support member 28, a concave line 29 is formed over the entire periphery. On the outer peripheral portion of the ring member 27, a ridge 30 is formed over the entire periphery. The ridges 30 of the ring member 27 are fitted into the ridges 29 of the respective support members 28. With such a configuration, the drum 21 can be smoothly rotated with respect to the support frame 8.

  The drum 21 includes a pump holding body 31 that holds each pump 24, and a chemical liquid bottle holding body 32 that is provided below the pump holding body 31 and holds each chemical liquid bottle 23. Each pump 24 is arranged in the pump holding body 31 at equal intervals in the drum circumferential direction. In the chemical liquid bottle holder 32, the chemical liquid bottles 23 are arranged at equal intervals in the drum circumferential direction.

  The drum rotation motor 22 is fixed to the support frame 8. A driving gear is fixed to the rotating shaft of the drum rotating motor 22. A driven gear 33 that meshes with the driving gear is fixed to the upper end portion 26 of the drum 21. The rotation of the drum rotation motor 22 is transmitted to the drum 21 via the drive gear and the driven gear 33.

  Each pump 24 is realized by a tube pump. Each pump 24 includes a tube 34 and a pump body 35 through which the tube 34 is inserted. In FIG. 1 to FIG. 3, the tubes 34 are omitted for the pumps 34 except for the front pump 34.

  The tube 34 has flexibility and elasticity. The tube 34 is realized by a silicon tube. One end 34 a of the tube 34 is inserted into the chemical bottle 23. A nozzle member 36 is provided at the other end 34 b of the tube 34. The nozzle members 36 of the pumps 24 are arranged at equal intervals in the drum circumferential direction on a virtual circle centered on the drum axis L1.

  The pump main body 35 includes a base fixed to the pump holding body 31, a rotor provided to be rotatable about an axis L2 parallel to the radial direction centered on the drum axis L1 with respect to the base, and an outer peripheral portion of the rotor. And a peripheral wall portion provided on the outer periphery of the peripheral track of each roller. A part of the tube 34 is inserted between the rotor and the peripheral wall portion. Due to the rotation of the rotor, at least one roller moves while pressing and pressing a part of the tube 34 toward the peripheral wall portion, thereby transferring the liquid medicine in the tube 34.

  The pump drive unit 25 is fixed to the support frame 8, and is fixed to the support frame 8. The pump drive unit 25 is disposed inside the pump holding body 31, and is movable to the fixed portion 37 so as to be movable in the front-rear direction A. A moving motor 39 fixed to the portion 37 and moving the moving portion 38 in the front-rear direction A with respect to the fixing portion 37; a pump driving motor 40 fixed to the moving portion 38 and rotating the rotor of the pump body 35; Have

  A connecting member 42 is fixed to a drive shaft 41 that is rotationally driven by the pump drive motor 40. A connected member 44 to which the connecting member 42 is connected is fixed to the rotating shaft 43 of the rotor of each pump 24. By connecting the connecting member 42 and the connected member 44, the rotation of the pump driving motor 40 can be transmitted to the pump 24. The supply speed of the chemical liquid increases as the rotation speed of the pump driving motor 40 (hereinafter referred to as “pump rotation speed”) increases.

  In such a chemical solution supply means 3, the connecting member 42 and the connected member 44 can be connected by advancing the moving part 38 by the moving motor 39. Further, the moving member 38 is moved backward by the moving motor 39 so that the connection between the connecting member 42 and the connected member 44 can be released. In the disconnected state, the drum 21 can be rotated with respect to the support frame 8. Therefore, the pump 24 to which the rotation of the pump driving motor 40 is transmitted can be selected, and thereby the chemical liquid supplied from the chemical liquid supply means 3 can be selected.

  The weight detection means 4 is disposed in the lower opening 15. The weight detection means 4 includes an electronic balance 45, a casing 46 that houses the electronic balance 45, and a prescription bottle holder 47 that is placed and fixed on the electronic balance 45 and holds the prescription bottle 2 in an upright state. Have. The electronic balance 45 sequentially gives the detected weight value to the control means 5. The electronic balance 45 is a tuning fork type. The electronic balance 45 may be a load cell type or an electromagnetic type. The casing 46 is provided below the left and right side portions 16 a and 16 b in the front surface portion 13 of the housing 6. The prescription bottle holder 47 includes a mounting table 48 on which the prescription bottle 2 is mounted, and a holder 49 that is provided on the mounting table 48 and holds the prescription bottle 2.

  The chemical solution supply apparatus 1 further includes an input means 50 for inputting the prescription content and the start command. The contents of the prescription include information designating the chemical solution and information designating the weight value of the chemical solution (hereinafter referred to as “designated weight value”). The input means 50 is realized by a touch panel device. The input means 50 is disposed in the upper space 11, and specifically is disposed behind the upper opening 14 so as to close the upper opening 14. The input means 50 faces the outside through the upper opening 14, whereby the operator can operate the input means 50 with fingers from the outside of the housing 6.

  FIG. 4 is a block diagram showing an electrical configuration of the chemical liquid supply apparatus 1. The control means 5 is given prescription contents and a start command from the input means 50. Also, the detected weight value is sequentially given from the electronic balance 45 to the control means 5. The control means 5 has a memory 51. The memory 51 stores a control program for realizing a chemical solution supply operation described later. The memory 51 stores a plurality of latest detected weight values given from the electronic balance 45. The detected weight value stored in the memory 51 is updated every time the detected weight value is given from the electronic balance 45. Further, the memory 51 stores pump rotation speed control data for controlling the pump rotation speed. The control means 5 controls the drum rotating motor 22, the moving motor 39, and the pump driving motor 40 based on a control program stored in the memory 51. Such a control means 5 is disposed in the upper space 11 and is fixed to the support frame 8.

  FIG. 5 is a diagram showing the relationship between the values used in the chemical solution supply operation by the control means 5. In the chemical supply operation, the target weight value and the intermediate target weight value are used. The target weight value is a target weight value for supplying the chemical solution to the prescription bottle 2, and specifically, a value obtained by adding the designated weight value to the stable weight value before supplying the chemical solution to the prescription bottle 2. . The intermediate target weight value is a weight value that is an intermediate target when supplying the drug solution to the prescription bottle 2, and is smaller than the target weight value.

  The stable weight value is a detected weight value in a stable state. In the present embodiment, the stable weight value is an average value for a plurality of latest detected weight values in a stable state. The stable state is a state in which the detected weight value fluctuates within a predetermined range, and in the present embodiment, the latest detected weight values are all within a predetermined range including the average value of these detected weight values. It is in a state that fits. The predetermined range is a range of the average value ± predetermined value.

  In the chemical solution supply operation, the retry value and the allowable lower limit value are used. The retry value is a weight value that serves as a reference for determining whether or not to re-supply the chemical solution, and is a value that is smaller than the intermediate target weight value. The allowable lower limit value is a weight value that serves as a reference for determining whether or not to end the chemical solution supply operation, and is a value smaller than the target weight value. This allowable lower limit is determined according to the accuracy required for the supply of the chemical solution, and is a value between the intermediate target weight value and the target weight value in the present embodiment.

  Further, the allowable upper limit value is used after the chemical solution supply operation. The allowable upper limit value is a weight value that serves as a reference for determining whether or not the chemical solution is excessively supplied, and is a value that is larger than the target weight value. This allowable upper limit value is determined according to the accuracy required for supplying the chemical solution.

  FIG. 6 is a graph showing the relationship between the insufficient weight value and the pump rotation speed with respect to the intermediate target weight value. In FIG. 6, the horizontal axis represents an underweight value with respect to the intermediate target weight value, and the vertical axis represents a pump rotation speed. The insufficient weight value with respect to the intermediate target weight value is a difference between the intermediate target weight value and the detected weight value.

  The control means 5 keeps the pump rotational speed constant until the insufficient weight value becomes equal to or less than the predetermined value. When the insufficient weight value becomes less than the predetermined value, the pump rotational speed decreases as the insufficient weight value decreases. The pump drive motor 40 is controlled. Specifically, when the underweight value becomes equal to or less than the predetermined value, the control means 5 decreases the ratio of the change amount of the pump rotation speed to the change amount of the underweight value as the underweight value decreases (hereinafter referred to as “change in pump rotation speed”). The pump drive motor 40 is controlled so that the "rate" is reduced.

  In the present embodiment, the rate of change of the pump rotation speed decreases stepwise as the insufficient weight value with respect to the intermediate target weight value decreases. In controlling the pump rotation speed in this way, the first to third reference values D1, D2, D3 are preset. The first reference value D1 is the predetermined value. The second reference value D2 is a value smaller than the first reference value D1. The third reference value D3 is a value smaller than the second reference value D2.

  When the insufficient weight value is larger than the first reference value D1, the pump rotation speed is maintained at the upper limit speed Rmax. The upper limit speed Rmax is set in advance according to the performance of the pump 24.

  When the underweight value is between the first reference value D1 and the second reference value D2 (hereinafter referred to as “first range”), the pump rotation speed is decreased as the underweight value decreases. The rate of change of the pump rotation speed when the underweight value is in the first range is constant.

  When the underweight value is between the second reference value D2 and the third reference value D3 (hereinafter referred to as “second range”), the pump rotational speed is decreased as the underweight value decreases. The rate of change of the pump rotational speed when the insufficient weight value is in the second range is constant, and is smaller than the rate of change of the pump rotational speed when the insufficient weight value is in the first range.

  When the underweight value is smaller than the third reference value D3, the pump rotation speed is maintained at the lower limit speed Rmin. The lower limit speed Rmin is set in advance according to the performance of the pump 24.

  The memory 51 stores pump rotation speed control data for controlling the pump rotation speed as described above. In the pump rotation speed control data, the insufficient weight value with respect to the intermediate target weight value and the pump rotation speed are associated with each other.

  FIG. 7 is a flowchart for explaining the chemical solution supply operation by the control means 5. From the input means 50, information specifying a chemical solution and a specified weight value are given as prescription information, and when a start command is given, the drum rotating motor 22 is rotated based on the information specifying the chemical solution, The nozzle member 36 that discharges the designated medicinal solution is opposed to the opening of the prescription bottle 2. Then, the moving motor 39 is rotated, thereby moving the moving part 38 forward, and the connecting member 42 and the connected member 44 are connected. Thereafter, the chemical supply operation is started.

  When the chemical supply operation is started, a stable weight value is acquired in step s1 (see FIG. 8 described later). In the next step s2, a target weight value is determined. The target weight value is obtained by adding the designated weight value given from the input means 50 to the stable weight value acquired in step s1. In the next step s3, an intermediate target weight value is determined. The intermediate target weight value is obtained by subtracting a predetermined value from the target weight value determined in step s2. The predetermined value is set in advance based on experimental results.

  Thereafter, in step s4, the rotation of the pump driving motor 40 is started. At this time, the pump rotation speed is set to the upper limit speed Rmax. In the next step s5, the detected weight value is acquired. In the next step s6, an insufficient weight value with respect to the intermediate target weight value is calculated. This insufficient weight value is obtained by subtracting the detected weight value acquired in step s5 from the intermediate target weight value determined in step s3. In the next step s7, the pump rotation speed is changed based on the underweight value calculated in step s6 (see FIG. 9 described later).

  Thereafter, in step s8, it is determined whether or not the detected weight value acquired in step s5 exceeds the intermediate target weight value determined in step s3. If the detected weight value is less than or equal to the intermediate target weight value, the process returns to step s5. When the detected weight value exceeds the intermediate target weight value, the process proceeds to step s9. In step s9, the rotation of the pump drive motor 40 is stopped, and the process proceeds to step s10.

  In step s10, a stable weight value is acquired (see FIG. 8 described later). In the next step s11, it is determined whether or not the stable weight value acquired in step s10 is greater than or equal to the retry value. If the stable weight value is less than the retry value, the process returns to step s4. If the stable weight value is greater than or equal to the retry value, the process proceeds to step s12.

  In step s12, it is determined whether or not the latest stable weight value is greater than or equal to the allowable lower limit value. Here, the latest stable weight value is the stable weight value acquired in step s10 for the first time, and the stable weight value acquired in the last minute supply operation after the second time (see FIG. 10 described later). ). If the stable weight value is equal to or greater than the allowable lower limit value, the chemical solution supply operation is terminated. If the stable weight value is less than the allowable lower limit value, the process proceeds to step s13. In step s13, a minute supply operation is executed, and the process returns to step s12. When the latest stable weight value exceeds the allowable upper limit value after the chemical solution supply operation is finished, an error is notified.

  An operator may touch the prescription bottle 2 or the prescription bottle holder 47 while supplying the chemical solution. At this time, although the chemical solution is not sufficiently supplied, the detected weight value may exceed the intermediate target weight value, and the rotation of the pump driving motor 40 may be stopped. In consideration of this point, in the chemical solution supply operation shown in FIG. 7, the step s11 is provided so that the chemical solution can be supplied again.

  By repeating such a chemical solution supply operation, a plurality of chemical solutions can be supplied to the prescription bottle 2. In this way, a chemical solution can be dispensed.

  FIG. 8 is a flowchart for explaining the stable weight value acquisition operation by the control means 5. When the stable weight value acquisition operation is started, in step a1, an average value is calculated for the latest detected weight values. The latest plurality of detected weight values are stored in the memory 51. In the next step a2, it is determined whether or not all of the latest detected weight values fall within a predetermined range including the average value calculated in step a1.

  When any of the detected weight values does not fall within the predetermined range, the process returns to step a1. When all the detected weight values are within the predetermined range, the process proceeds to step a3. In step a3, the average value calculated in step a1 is set as the stable weight value, and the stable weight value acquisition operation is terminated. When a predetermined time has elapsed since the start of the stable weight value acquisition operation, an error is notified.

  FIG. 9 is a flowchart for explaining the pump rotation speed changing operation by the control means 5. When the pump rotation speed changing operation is started, it is determined in step b1 whether or not the insufficient weight value calculated in step s6 in FIG. 7 is equal to or less than the first reference value D1 (see FIG. 6 described above). When the insufficient weight value exceeds the first reference value D1, the pump rotation speed changing operation is terminated. When the insufficient weight value is equal to or less than the first reference value D1, the process proceeds to step b2.

  In step b2, the pump rotation speed corresponding to the underweight value calculated in step s6 is acquired. At this time, the pump rotation speed control data stored in the memory 51 is referred to. In the next step b3, it is determined whether or not the current pump rotation speed exceeds the pump rotation speed acquired in step b2. If the current pump rotation speed is less than or equal to the acquired pump rotation speed, the pump rotation speed changing operation is terminated. When the current pump rotation speed exceeds the acquired pump rotation speed, the process proceeds to step b4. In step b4, the pump rotation speed is changed from the current pump rotation speed to the acquired pump rotation speed, and the pump rotation speed changing operation is terminated.

FIG. 10 is a flowchart for explaining the micro supply operation by the control means 5. When the minute supply operation is started, the pump rotation amount is determined in step c1. In determining the pump rotation amount, first, an insufficient weight value with respect to the target weight value is calculated. This underweight value is obtained by subtracting the latest stable weight value from the target weight value. Here, the latest stable weight value is the stable weight value acquired in step s10 in the first micro supply operation, and in the second and subsequent micro supply operations, in step c3 described later in the previous micro supply operation. It is the acquired stable weight value. Next, the pump rotation amount is determined based on the insufficient weight value with respect to the target weight value.
In the next step c2, the pump driving motor 40 is rotated by the pump rotation amount determined in the step c1. In the next step c3, a stable weight value is acquired (see FIG. 8 described above), and the minute supply operation is terminated.

  FIG. 11 is a graph showing an example of a time change of the detected weight value. At time t0, the chemical supply operation is started. At time t1, rotation of the pump driving motor 40 is started. From time t0 to time t1, the detected weight value is substantially constant. At time t2, the insufficient weight value with respect to the intermediate target weight value becomes the first reference value D1. From time t1 to time t2, the detected weight value generally increases in proportion to time.

  At time t3, the insufficient weight value with respect to the intermediate target weight value becomes the second reference value D2. At time t4, the insufficient weight value with respect to the intermediate target weight value becomes the third reference value D3. At time t5, the detected weight value becomes the intermediate target weight value. From time t2 to time t5, the increase rate of the detected weight value generally decreases with time.

  At time t6, the minute supply operation is started. From time t5 to time t6, the detected weight value is substantially constant. At time t7, the micro supply operation is terminated. From time t6 to time t7, the detected weight value generally increases in proportion to time. The detected weight value is substantially constant after time t7.

  According to the present embodiment as described above, the chemical solution is supplied to the prescription bottle 2 by the chemical solution supply means 3. The weight of the chemical solution stored in the prescription bottle 2 is detected by the weight detection means 4. The control means 5 controls the chemical solution supply means 3 based on the detected weight value detected by the weight detection means 4. The detected weight value is sequentially given to the control means 5 from the weight detection means 4. Accordingly, the control means 5 can accurately control the chemical solution supply means 3 based on the latest detected weight value.

  The control means 5 determines an intermediate target weight value smaller than the target weight value, and when a detected weight value exceeding the intermediate target weight value is given during supply of the chemical solution, the chemical solution is temporarily limited so as to temporarily limit the supply of the chemical solution. The supply means 3 is controlled. Therefore, even if the detected weight value is unstable, it is possible to prevent excessive supply of the chemical solution.

  In addition, the control means 5 temporarily controls the chemical liquid supply means 3 to supply the chemical liquid based on the target weight value and the detected weight value when the detection weight value is stabilized after temporarily limiting the supply of the chemical liquid as described above. Control. Therefore, the shortage of the chemical solution can be supplied based on a more accurate deficient weight value, thereby improving the supply accuracy of the chemical solution.

  When the chemical solution is supplied to the prescription bottle 2, it shakes in the prescription bottle 2. Therefore, when the chemical solution is supplied to the prescription bottle 2, the detected weight value is unstable. Therefore, the chemical solution is supplied as described above, thereby improving the supply accuracy of the chemical solution.

  Further, according to the present embodiment, the supply rate of the chemical solution is decreased as the difference between the intermediate target weight value and the detected weight value decreases until a detected weight value exceeding the intermediate target weight value is given. Therefore, the supply time of the chemical liquid can be shortened and the excessive supply of the chemical liquid can be prevented.

  In this embodiment, it is possible to determine the intermediate target weight value as close as possible to the target weight value while preventing excessive supply of the chemical solution. By setting the intermediate target weight value to a value close to the target weight value, it is possible to reduce the amount of chemical liquid that is additionally supplied after temporarily limiting the supply of the chemical liquid, and to reduce the chemical supply error.

  In addition, according to the present embodiment, the supply rate of the chemical solution can be maintained constant until the difference between the intermediate target weight value and the detected weight value is equal to or less than a predetermined value, thereby shortening the supply time of the chemical solution. . Further, when the difference between the intermediate target weight value and the detected weight value is equal to or less than the predetermined value, the supply speed of the chemical liquid is decreased as the difference between the intermediate target weight value and the detected weight value is reduced, thereby oversupplying the chemical liquid. Can be prevented.

  Further, according to the present embodiment, when the difference between the intermediate target weight value and the detected weight value is equal to or less than the predetermined value, the smaller the difference between the intermediate target weight value and the detected weight value, the smaller the chemical solution with respect to the change amount of this difference. The rate of change in the supply speed is made small. As a result, the supply time of the chemical liquid can be shortened as much as possible, and the excessive supply of the chemical liquid can be reliably prevented.

  Further, according to the present embodiment, when the detected weight value is stable, when the latest plurality of detected weight values are all within a predetermined range including the average value of these detected weight values, To do. This makes it possible to accurately determine whether or not the detected weight value is stable.

  Further, according to the present embodiment, when the detected weight value is stabilized, the chemical solution is supplied based on the difference between the average value and the target weight value for the latest detected weight values. Therefore, the shortage of the chemical solution can be supplied based on a more accurate deficient weight value, thereby improving the supply accuracy of the chemical solution.

  In the above-described embodiment, when the insufficient weight value with respect to the intermediate target weight value becomes equal to or less than the predetermined value, the rate of change of the pump rotation speed decreases stepwise as the insufficient weight value decreases, but continuously decreases. It may be made to become.

  In the above-described embodiment, the drug is liquid, but the drug may be solid. Examples of solid drugs include powders, tablets and capsules. Even with such a solid drug, the same effect can be achieved.

  The medicine supply device includes a medicine supply means for supplying medicine to the container, a weight detection means for detecting the weight of the medicine contained in the container, and a medicine supply based on the detected weight value detected by the weight detection means. Control means for controlling the means, the weight detection means sequentially gives the detected weight value to the control means, the control means determines an intermediate target weight value smaller than the target weight value, and intermediate during the supply of the medicine When a detected weight value exceeding the target weight value is given, supply of the medicine is temporarily limited. After that, when the detected weight value is stabilized, the medicine is supplied based on the target weight value and the detected weight value. It can be configured to control the medicine supply means.

  According to this medicine supply device, the medicine is supplied to the container by the medicine supply means. The weight of the medicine accommodated in the container is detected by weight detection means. The control means controls the medicine supply means based on the detected weight value detected by the weight detection means. The detected weight value is sequentially given to the control means from the weight detecting means. Therefore, the control means can accurately control the medicine supply means based on the latest detected weight value.

  The control means determines an intermediate target weight value smaller than the target weight value, and when a detected weight value exceeding the intermediate target weight value is given during the supply of the drug, the drug supply is temporarily limited. Control means. Therefore, even if the detected weight value is unstable, it is possible to prevent excessive supply of the medicine.

  Further, the control means controls the medicine supply means so as to supply the medicine based on the target weight value and the detected weight value when the detection weight value is stabilized after temporarily restricting the supply of the medicine as described above. . Therefore, the shortage of the medicine can be supplied based on a more accurate deficient weight value, thereby improving the medicine supply accuracy.

  Further, the control means controls the medicine supply means so that the medicine supply speed becomes lower as the difference between the intermediate target weight value and the detected weight value becomes smaller until a detected weight value exceeding the intermediate target weight value is given. Can be configured to.

  According to this medicine supply device, the medicine supply rate is made lower as the difference between the intermediate target weight value and the detected weight value becomes smaller until a detected weight value exceeding the intermediate target weight value is given. Therefore, the supply time of the medicine can be shortened and the oversupply of the medicine can be prevented.

  In such a medicine supply device, it is possible to determine the intermediate target weight value as close as possible to the target weight value while preventing excessive supply of the medicine. By setting the intermediate target weight value to a value close to the target weight value, it is possible to reduce the amount of the medicine that is additionally supplied after the supply of the medicine is once limited, and to reduce the medicine supply error.

  Further, the control means maintains the medicine supply rate constant until the difference between the intermediate target weight value and the detected weight value is equal to or less than the predetermined value, and the difference between the intermediate target weight value and the detected weight value is the predetermined value. In the following, it is possible to configure the medicine supply means so that the medicine supply speed decreases as the difference between the intermediate target weight value and the detected weight value decreases.

  According to this medicine supply device, the medicine supply speed is kept constant until the difference between the intermediate target weight value and the detected weight value becomes a predetermined value or less, thereby shortening the medicine supply time. Further, when the difference between the intermediate target weight value and the detected weight value is equal to or less than the predetermined value, the medicine supply speed is lowered as the difference between the intermediate target weight value and the detected weight value is reduced, thereby oversupplying the medicine. Can be prevented.

  In the medicine supply device, when the difference between the intermediate target weight value and the detected weight value becomes equal to or less than the predetermined value, the difference between the intermediate target weight value and the detected weight value decreases as the difference between the intermediate target weight value and the detected weight value decreases. It is possible to configure the medicine supply means so that the rate of change in the medicine supply rate is reduced.

  According to this medicine supply device, when the difference between the intermediate target weight value and the detected weight value is equal to or less than the predetermined value, the smaller the difference between the intermediate target weight value and the detected weight value, The rate of change in the supply speed is made small. Thereby, the supply time of the medicine can be shortened as much as possible, and the oversupply of the medicine can be surely prevented.

  In addition, when the detected weight value is stabilized, the latest detected weight values can all be within a predetermined range including the average value of these detected weight values.

  According to this medicine supply device, when the detected weight value is stabilized, the latest plurality of detected weight values are all within a predetermined range including the average value of these detected weight values. . This makes it possible to accurately determine whether or not the detected weight value is stable.

  In addition, the medicine supply device has the medicine supply means configured to supply the medicine based on the difference between the average value and the target weight value for the latest plurality of detected weight values when the detected weight value is stabilized. It can be configured to control.

  According to this medicine supply device, when the detected weight value is stabilized, the medicine is supplied based on the difference between the average value and the target weight value for the latest plurality of detected weight values. Therefore, the shortage of the medicine can be supplied based on a more accurate deficient weight value, thereby improving the medicine supply accuracy.

  In the medicine supply device, the medicine can be liquid. According to this medicine supply device, the medicine is liquid. The liquid drug shakes in the container when supplied to the container. Therefore, when a liquid medicine is supplied to the container, the detected weight value is unstable. Therefore, the medicine can be supplied as described above, thereby improving the medicine supply accuracy.

  The drug supply method is a drug supply method for supplying a drug to the container while detecting the weight of the drug contained in the container, wherein an intermediate target weight value smaller than the target weight value is determined and the drug is being supplied. When the detected weight value exceeds the intermediate target weight value, the supply of the drug is temporarily limited, and then the drug supply that supplies the drug based on the target weight value and the detected weight value when the detected weight value becomes stable. It can be a method.

  According to this medicine supply method, an intermediate target weight value smaller than the target weight value is determined, and when the detected weight value exceeds the intermediate target weight value during medicine supply, the medicine supply is temporarily limited. Therefore, even if the detected weight value is unstable, it is possible to prevent excessive supply of the medicine. Further, after the supply of the medicine is once limited as described above, when the detected weight value is stabilized, the medicine is supplied based on the target weight value and the detected weight value. Therefore, the shortage of the medicine can be supplied based on a more accurate deficient weight value, thereby improving the medicine supply accuracy.

  The medicine supply device is based on a medicine supply means for supplying a liquid or solid medicine to the container, a weight detection means for detecting the weight of the medicine contained in the container, and a detected weight value detected by the weight detection means. Control means for controlling the medicine supply means, the weight detection means sequentially gives the detected weight value to the control means, and the control means determines an intermediate target weight value smaller than the target weight value based on the prescription information. When the detected weight value exceeding the intermediate target weight value is given during the supply of the medicine, the supply of the medicine is temporarily limited, and whether or not the sequentially detected weight value is stabilized in the restricted state is determined. When it is determined that the detected weight value is stable, the medicine supply means can be controlled to supply the medicine based on the detected weight value and the target weight value in the stable state.

  Further, the control means controls the medicine supply means so that the medicine supply speed becomes lower as the difference between the intermediate target weight value and the detected weight value becomes smaller until a detected weight value exceeding the intermediate target weight value is given. To do.

  Further, the control means maintains the medicine supply rate constant until the difference between the intermediate target weight value and the detected weight value is equal to or less than the predetermined value, and the difference between the intermediate target weight value and the detected weight value is the predetermined value. Below, the medicine supply means is controlled so that the difference between the intermediate target weight value and the detected weight value becomes smaller as the medicine supply speed becomes lower.

  In addition, when the difference between the intermediate target weight value and the detected weight value is equal to or less than the predetermined value, the control means decreases the difference between the intermediate target weight value and the detected weight value, and the drug supply speed with respect to the change amount of the difference. The medicine supply means is controlled so that the ratio of the amount of change is small.

  The detected weight value is stabilized when all of the latest detected weight values are all within a predetermined range including the average value of the detected weight values.

  In addition, when it is determined that the detected weight value is stable, the control means controls the medicine supply means so as to supply the medicine based on the difference between the average value and the target weight value for the latest plurality of detected weight values. To do.

  Further, as a medicine supply method, a medicine supply method for supplying medicine to the container while detecting the weight of the liquid or solid medicine contained in the container, the intermediate target being smaller than a target weight value based on prescription information When the weight value is determined and the detected weight value exceeds the intermediate target weight value during the supply of the drug, the supply of the drug is temporarily limited, and whether or not the detected weight value sequentially given is stable in the limited state. When it is determined that the detected weight value is stable, the medicine can be supplied based on the detected weight value and the target weight value in the stable state.

DESCRIPTION OF SYMBOLS 1 ... Chemical solution supply apparatus, 2 ... Prescription bottle, 3 ... Chemical solution supply means, 4 ... Weight detection means, 5 ... Control means

Claims (2)

An input means for inputting prescription information;
A drug supply means for supplying a liquid or solid drug to the container;
A weight detecting means for detecting the weight of the medicine contained in the container;
Control means for controlling the medicine supply means so as to supply the medicine based on the target weight value based on the prescription information and the detected weight value detected by the weight detection means ,
The control means includes
Determining an intermediate target weight value smaller than the target weight value;
When the detected weight value exceeds the intermediate target weight value during the supply of the drug is given, the drug feeder characterized that you temporarily limit the supply of drugs. The control means includes
When the detected weight value exceeding the intermediate target weight value is given during the supply of the medicine, the supply of the medicine is temporarily limited, and then the medicine is supplied based on the target weight value and the detected weight value. The medicine supply apparatus according to claim 1, wherein the medicine supply means is controlled as described above.

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