JP4861297B2 - Liquid medicine dispensing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid medicine dispensing device capable of appropriately dispensing in a simpler configuration. <P>SOLUTION: The liquid medicine dispensing device comprises a rotary unit 12 which rotates while holding a plurality of original drug vials 100, and a conveying mechanism for conveying a prescription bottle 110 in the horizontal direction on the lower side of the rotary unit 12. Each of the original drug vials 100 is connected with a discharge nozzle 17 to which a discharge valve 26 is attached, and an air nozzle 29 connected with a pump or an atmospheric relief valve. When liquid medicine is discharged, the prescription bottle 110 is conveyed in advance to a position directly under the original drug vial 100 required for dispensing. Under that state, the rotary unit 12 is turned by 180 degrees to turn over the original drug vial 100, thus opening the discharge valve 26. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a liquid medicine dispensing device that dispenses liquid medicine by discharging one or more kinds of liquid medicine from an original drug bottle to a prescription bottle.

  2. Description of the Related Art Conventionally, there is known a liquid medicine dispensing device that dispenses liquid medicines by dispensing a plurality of types of liquid medicines from an original drug bottle into a prescription bottle in an amount as instructed by a prescription. For example, Patent Document 1 below discloses a liquid medicine dispensing device that drops liquid medicine into a prescription bottle by tumbling each medicine bottle (original medicine bottle) at a dispensing position where the prescription bottle is set. ing. According to such a liquid medicine dispensing device, the original drug bottle is also agitated by the movement at the time of the fall, so that the liquid medicine can be appropriately charged.

JP 2007-21087 A

  However, in Patent Document 1, a tipping mechanism is provided for each original drug vial. In other words, as many as the number of original drug vials, a drive source and a transmission mechanism for falling are necessary. For this reason, there has been a problem of increased cost and complicated control. Therefore, an object of the present invention is to provide a liquid medicine dispensing device capable of appropriate dispensing with a simpler configuration.

  The liquid medicine dispensing device of the present invention is a liquid medicine dispensing apparatus that dispenses liquid medicine by discharging one or more types of liquid medicine from the original medicine bottle to the prescription bottle, and arranging a plurality of original medicine bottles in a predetermined direction. A rotation unit that rotates the plurality of original drug vials in conjunction with each other by rotating while holding, a discharge nozzle connected to each original drug vial, an openable / closable discharge valve provided in each discharge nozzle, A transport mechanism for transporting the prescription bottle in the lower space of the rotation unit, a detection means for detecting the amount of liquid medicine discharged to the prescription bottle, and a control means for controlling the drive of the rotation unit, the discharge valve, and the transport mechanism. Rotate the rotation unit at least until the liquid medicine discharge is started to overturn the original drug vial to be discharged, and move the transport mechanism to a position just below the original drug bottle to be discharged. After that, the detection value at the detection means becomes the target value. To open a discharge valve corresponding to the original drug vial to be discharged until, characterized in that it comprises a control means for discharging liquid medicine, the.

  In a preferred aspect, the rotating unit holds the fixed body, the plurality of original drug vials, and the rotating body held rotatably with respect to the fixed body, and the rotating body between the fixed body and the rotating body. A wire rod having one end connected to a rotating body or an original drug vial held by the rotating body and the other end connected to a fixed member. It is wound around an intervening body.

In another preferred embodiment, an air nozzle that is connected to the original drug vial and guides air to the original drug bottle, and a pump that is connected to the original drug bottle via the air nozzle and pressurizes the inside of the original drug bottle, obtain Bei. In this case, it is desirable that the pump pressurizes the inside of the original drug vial after the rotation unit rotates.

  In another preferred aspect, the apparatus further includes an atmospheric pressure release valve connected to the air nozzle and opened when the liquid medicine is discharged to open the original drug vial at atmospheric pressure. In this case, it is desirable to further include a filter that is provided between the atmospheric pressure release valve and the original drug vial and removes foreign matter that has entered through the atmospheric pressure release valve.

  In another preferred aspect, the control unit drives the pump to depressurize the valve when the detection value of the detection means reaches the target value, thereby removing the liquid medicine remaining in the discharge nozzle from the original drug vial. Return to.

  According to the present invention, the rotation of the original drug vial is realized by the rotation of the rotating unit holding a plurality of original drug vials. Therefore, it is not necessary to provide a drive source for overturning for each original drug vial, and a liquid medicine dispensing device with a simpler configuration can be obtained.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a liquid medicine dispensing device according to an embodiment of the present invention. FIG. 2 is a schematic perspective view of the liquid medicine dispensing device. Note that FIG. 2 illustrates a state in which only one rotation unit 12 out of three rotation units 12 to be described later is pulled out to the front side for easy viewing.

  This liquid medicine dispensing device dispenses one or more different kinds of liquid medicines sequentially from the original drug bottle 100 to the prescription bottle 110 based on the prescription data input via the operation unit 18 for dispensing. . The original drug vial 100 is set in advance in three rotating units 12 provided in the liquid medicine dispensing device. Each rotation unit 12 rotates the three original drug vials 100 by rotating while holding the three original drug vials 100. And in the state which fell, the liquid medicine is discharged from the discharge nozzle 27 by opening the discharge valve 26 provided in the discharge nozzle 27 connected to the original drug vial 100.

In the present embodiment, the three rotation units 12 are arranged in the apparatus width direction ( y direction in FIG. 2). In addition, since each rotation unit 12 holds three original drug vials 100 arranged in the apparatus depth direction ( x direction in FIG. 2), the total nine original drug vials 100 are 3 × 3 as the entire apparatus. It will be arranged in an array. Each rotating unit 12 can be pulled out to the front side for replacement and maintenance of the original drug vial 100. At the time of this drawing, a barcode reader (not shown in FIG. 2) installed in the apparatus housing reads the barcode attached to the original drug vial 100. The control unit manages the type and position of each original drug vial 100 based on the read information.

  The prescription bottle 110 into which the liquid medicine is charged is placed on the balance table 34 in a state of being set in the adapter 38. The adapter 38 adjusts the height of the upper end of the prescription bottle 110 and includes a mounting table that can be raised and lowered.

  The scale 34 is assembled to the XY table 36 and moves horizontally on the lower side of the rotary unit 12. The balance table 34 incorporates a load cell and detects the weight of the adapter 38 and the prescription bottle 110 placed on the upper side. The control unit controls the driving of the XY table to move the prescription bottle 110 to a position directly below the original drug vial 100 storing a desired liquid medicine. In this state, the original drug vial 100 is turned over and the discharge valve 26 is opened, so that the liquid medicine is charged into the prescription bottle 110. The control unit calculates the amount of liquid medicine put into the prescription bottle 110 based on the detected value in the load cell provided on the weighing platform 34.

  In addition, if the size of the prescription bottle 110 is inappropriate or the lid is still attached to the prescription bottle 110 at the time of this dosing, not only proper liquid medicine can not be dispensed, but also discharge from the original drug bottle 100. There are also problems such as splashing of liquid medicine. Therefore, a size sensor 40 that detects the size of the prescription bottle 110 and a lid sensor 42 that detects the presence or absence of a lid are provided in the vicinity of the entrance to the discharge space, which is the lower space of the rotation unit 12. Hereinafter, each part of this liquid medicine dispensing device will be described in detail.

[Original medicine bottle and medication bottle]
First, the original drug bottle 100 and the prescription bottle 110 set in the liquid medicine dispensing device by the user will be described. FIG. 3 is a perspective view and a sectional view of the original drug vial 100. The original drug vial 100 is a substantially cylindrical container that stores liquid medicine to be discharged. The size of the original drug vial 100 is substantially the same regardless of the type of liquid medicine, and a small-diameter mouth part 100b is connected to the upper side of the large-diameter body part 100a. A medicine type barcode 102 that functions as a medicine type identifier indicating the kind of the original medicine bottle 100 is attached to the body 100.

  When the original drug vial 100 is set in the rotation unit 12, a special cap 25 connected to the discharge nozzle 27 and the like is attached to the mouth portion 100 b of the original drug vial 100. The special cap 25 is a cap that can be attached to and detached from the original drug vial opening 100b by screwing. In the special cap 25, a sealing body 25a made of an elastic material is disposed at a position of contact with the upper end surface of the mouth portion 100b, and liquid leakage from the original drug vial 100 is prevented. A discharge nozzle 27 is formed so as to protrude from the upper surface of the special cap 25. The liquid medicine accommodated in the original drug vial 100 is discharged to the outside through the discharge nozzle 27.

  An air nozzle 29 is inserted in a position adjacent to the discharge nozzle 27. The air nozzle 29 is a nozzle connected to the pump 20 via the atmospheric pressure release valve 31. Air is sent to the original drug vial 100 through the air nozzle 29. The lower end of the air nozzle 29 extends to the vicinity of the bottom of the original drug vial 100. When the original drug vial 100 is overturned, the lower end (the upper end when the original drug vial falls 180 degrees) becomes the lower end. It can protrude from the water surface.

  FIG. 4 is a perspective view showing an example of the prescription bottle 110. The prescription bottle 110 is a container through which liquid medicine is discharged for liquid medicine dispensing. The prescription bottle 110 to which the liquid medicine is discharged and dispensed is delivered to the patient with a lid (not shown). Here, this prescription bottle 110 is prepared in various sizes according to the total amount of liquid medicine required for dispensing. For example, as the prescription bottle 110, those for 30 ml, 60 ml, 100 ml, 150 ml, and 200 ml are prepared, and the total length (height) is different for each volume. In the case of the prescription bottles 110 having the same capacity, the overall length is substantially the same. At the time of liquid medicine dispensing, the user selects a prescription bottle 110 suitable for the total amount of liquid medicine to be dispensed from among the various prescription bottles 110 and sets it in the liquid medicine dispensing device.

[Rotating unit]
FIG. 5 is a perspective view of one rotating unit 12. FIG. 6 is an exploded perspective view of the rotary unit 12. Further, FIG. 7 is a perspective view of the rotary unit 12 in a state in which a holding bar 52 described later is opened.

  The rotation unit 12 is a unit that rotates while holding the three original drug vials 100, and functions as a holding means for the original drug vials 100. Each rotary unit 12 includes a fixed plate 46 fixed to a fixed member (device housing), a rotary plate 44 that is rotatable with respect to the fixed plate 46, a rotation mechanism 48 that rotates the rotary plate 44, and the like. The

  The rotating plate 44 has a substantially L shape including a placement surface 44a on which the original drug vial 100 is placed, and a vertical surface 44b extending approximately 90 degrees above the placement surface 44a. . A cover sheet 49 made of an elastic material such as urethane is provided above the placement surface 44a. The cover sheet 49 is formed with a substantially circular recess having a size corresponding to the outer diameter of the bottom of the original drug vial 100. By placing the original drug vial 100 in the recess, the prescription bottle 110 is provided. Positioned.

  A discharge valve 26 for opening and closing the discharge nozzle 27 is fixed to the vertical surface 44b. The discharge valve 26 is a pinch valve whose opening and closing is controlled by the control unit 10. The signal line connected to the discharge valve 26 is drawn to the rear side of the rotating plate 44 and then connected to the control unit 10. The air nozzle 29 extending from the original drug vial 100 is also pulled out to the rear side of the rotating plate 44 and then connected to the pump 20 installed on the upper side of the liquid medicine dispensing device. In addition, a holding member 50 that prevents the original drug vial 100 from falling in cooperation with a holding bar 52 described later is also formed on the vertical surface 44b. The holding member 50 is formed by sandwiching an elastic material such as urethane with a metal plate, and is formed to project from a height position corresponding to the shoulder portion of the original drug vial 100 in the standing surface 44b. The holding member 50 is provided with a notch or the like that allows passage of the mouth of the set original drug vial 100. When the original drug vial 100 falls, it comes into contact with the shoulder of the original drug vial 100, The original drug vial 100 is prevented from falling.

  The holding bar 52 is attached to the rear end of the rotating plate 44 via a hinge (not shown), and can be opened and closed with respect to the rotating plate 44. A buckle 52a that can be locked to a clasp provided on the rotating plate 44 is provided at the tip of the holding bar 52, and the closed state can be maintained by locking the buckle 52a to the clasp. It has become. In addition, a pressing body 52b made of an elastic material such as urethane is formed on the surface of the holding bar 52 facing the rotating plate 44 so as to protrude. The pressing body 52b has a shape corresponding to the original drug vial 100 placed on the placement surface 44a, and can press the side surface of the original drug vial 100 when the holding bar 52 is closed. It has become. And by pressing with this press body 52b, the three original drug vials 100 will be hold | maintained collectively in the state by which fall and position shift were prevented.

  Here, the holding bar 52 is installed at a height that avoids the medicine type barcode 102 attached to the original medicine bottle 100 when closed. Therefore, even if the holding bar 52 is closed, the medicine type barcode 102 is exposed to the outside and is visible. The holding bar 52 is provided with three sticking plates 52c that hang downward. The sticking plate 52c is a plate to which a position barcode 54 that functions as a position identifier indicating the position is attached. The sticking plates 52c are arranged at regular intervals so as to be positioned between the three original drug vials 100 placed on the rotating plate 44. From another viewpoint, when the holding bar 52 is closed, the medicine type barcode 102 attached to the side surface of the original drug bottle 100, and the position barcode 54 attached to the attaching plate 52c, Are alternately arranged in the adjacent direction of the original drug vial 100 (x direction in FIG. 5). A bar code reader (not shown) provided in the apparatus casing sequentially reads the two types of bar codes 102 and 54 arranged alternately to grasp the type and position of each original drug vial 100. Will be described in detail later.

  The rotating plate 44 is rotated approximately 180 degrees with respect to the fixed plate 46 by the rotating mechanism 48. As shown in FIG. 6, the rotating mechanism 48 includes a support shaft 48 c that rotatably supports the rotating plate 44, a motor 48 a fixedly installed on the fixed plate 46, and a gear 48 b connected to the output shaft of the motor 48 a. The internal gear 48d is fixed to the rotating plate 44 and meshes with the gear 48b, and the substantially cylindrical cover 48e covering the outer periphery of the internal gear 48d. The control unit 10 appropriately drives the motor 48a according to the progress of the dispensing process, rotates the rotating plate 44, and thus causes the original drug vial 100 to fall.

  Here, as is apparent from FIG. 6, a cover 48 e provided substantially concentrically with the rotation shaft of the rotating plate 44 is interposed between the rotating plate 44 and the fixed plate 46. On the outer periphery of the cover 48e, one end of the cover 48e such as a signal line drawn from the air nozzle 29 or the discharge valve 26 is rotated together with the rotating plate 44, and the other end is connected to a fixing member such as the pump 20 or the control unit 10. Is wound. The winding direction is opposite to the rotating direction of the rotating plate 44. That is, when the rotating plate 44 rotates counterclockwise toward the front, the wire is wound clockwise. The reason why the wire is wound around the outer periphery of the cover 48e in this manner is to prevent the wire from dripping or pulling as the rotating plate 44 rotates. This will be described with reference to FIG.

  FIGS. 8A and 8B are schematic side views of the rotation unit 12, where FIG. 8A shows a state before rotation and FIG. 8B shows a state after rotation. When the rotating unit 12 rotates, the original drug vial 100 placed on the rotating plate 44 naturally rotates. As the original drug vial 100 rotates, the end position of the air nozzle 29 inserted through the original drug vial 100 also changes. At this time, if the air nozzle 29 is not wound around the cover 48e, the end position of the air nozzle 29 cannot be followed and the air nozzle 29 is pulled. Of course, as shown by the reference numeral 29 ′ in FIG. 8A, this pulling can be prevented by keeping a large amount of air nozzle 29 ′. However, such dripping of the air nozzle 29 'is undesirable because it causes entanglement with other wire rods. Therefore, in the present embodiment, the wire rod such as the air nozzle 29 is wound around the outer periphery of the cover 48e. This prevents the wire rod such as the air nozzle 29 from dripping unnecessarily before the rotation. Even if the end position of the air nozzle 29 changes with the rotation of the rotating plate 44, the air nozzle 29 is not pulled because the winding is released by that amount. That is, by winding a wire such as the air nozzle 29 around the substantially cylindrical cover 48e, the wire is prevented from dripping or pulling. In the present embodiment, a wire rod is wound around the cover 48e. However, any other member may be used as long as it is a member located substantially concentrically with the rotation axis of the rotating plate 44 between the rotating plate 44 and the fixed plate 46. A wire rod may be wound around.

  Here, the rotation unit 12 described so far can be pulled out to the near side. FIG. 9 is a view of the rotating unit 12 being pulled out as viewed from the fixed plate 46 side. As illustrated in FIG. 9, two rails 56 extending in the apparatus depth direction (x direction) are provided on the back surface of the fixed plate 46. The two rails are inserted into a guide groove 58 fixed to the apparatus housing, and are slidable along the guide groove 58. As a result, the entire rotary unit 12 including the fixed plate 46 can move forward and backward with respect to the apparatus housing.

When exchanging the original drug vial 100 or the like, the user pulls out the rotary unit 12 toward the front side and exposes the rotary unit 12 to the outside. That is, the state shown in FIG. 9 is set. In this state, work such as replacement of the original drug vial 100 is performed. When the predetermined work is completed, the user pushes the drawn rotary unit 12 back and returns it to the original position.

  A bar for reading the barcodes 54 and 102 attached to the original drug vial 100 and the holding bar 52 is located at a position facing the original drug vial 100 held by the rotating unit 12 in the apparatus housing. A code reader 24 is installed (see FIG. 16A, etc.). The control unit 10 manages the type and position of the original drug vial 100 based on the value read by the barcode reader 24, which will be described in detail later.

  By the way, as is apparent from the above description, in the present embodiment, a plurality of original drug vials 100 are held by one rotating unit 12, and the plurality of original drug vials 100 are interlocked by rotating the rotating unit 12. It is falling down. In other words, a plurality of original drug vials 100 are interlocked and overturned by a single rotation mechanism. Therefore, in the present embodiment, the number of drive sources and transmission mechanisms required for overturning the original drug vial 100 can be reduced as compared with the conventional technique described in Patent Document 1. As a result, an appropriate dispensing process can be performed with a simpler configuration.

[Discharge mechanism]
Next, a discharge mechanism for discharging liquid medicine from the original drug vial 100 will be described. In the present embodiment, the original drug vial 100 is turned over and the liquid medicine is discharged by the gravity received at that time. Therefore, the rotation unit 12 that turns over the original drug vial 100 and the discharge valve 26 that opens and closes the discharge nozzle 27 are considered to be part of the discharge mechanism. In addition to these, as a mechanism related to liquid medicine discharge, in this embodiment, the pump 20 that supplies air to the original drug vial 100, the air tube 30 that connects the pump 20 and the air nozzle 29, and a plurality of valves 26 and 28 are also provided (see FIG. 1).

  The pump 20 promotes the discharge of liquid medicine by supplying air to the original drug vial 100 and increasing its internal pressure. The pump 20 is fixedly installed on the upper part of the apparatus, and is driven according to an instruction from the control unit 10. The air tube 30 connected to the pump 20 branches into a plurality on the way and is connected to the original drug vial 100 as an air nozzle 29. Each air nozzle 29 is provided with a switching valve 28 for allowing or blocking the communication state with the pump 20. At the time of liquid medicine discharge, the control unit 10 selectively selects the switching valve 28 corresponding to the desired original drug vial 100 from among the plurality of switching valves 28 and opens it. Thereby, the pump 20 and the original drug vial 100 are connected.

  The air tube 30 is provided with an atmospheric pressure release valve 31. The atmospheric pressure release valve 31 is provided on the downstream side of the pump 20 and the upstream side of the switching valve 28, and is opened to reduce the internal pressure of the original drug vial 100 connected to the pump 20 to the atmospheric pressure. Can be returned to. In addition, a filter 32 is provided between the atmospheric pressure release valve 31 and the original drug vial 100 in order to prevent intrusion of dust or the like existing in the outside air through the atmospheric pressure release valve 31.

  When discharging the liquid medicine, the control unit 10 drives and controls the rotary unit 12, the pump 20, the various valves 26, 28, 31 and the like. The specific control flow will be described in detail later.

[Moving scale unit]
FIG. 10 is a perspective view of the moving scale unit. This moving scale unit is installed in the lower part of the liquid medicine dispensing device, and horizontally moves the prescription bottle 110 below the rotating unit 12. The moving scale unit 14 is configured on a drawer tray 19 that is configured to be freely drawable at the bottom of the liquid medicine dispensing device. Therefore, by pulling out the drawer tray 19, the movable scale unit 14 can be pulled out of the apparatus. Thereby, the user can easily perform the cleaning process around the movable scale unit 14, particularly the cleaning process when the liquid medicine is scattered.

  The moving balance unit 14 is roughly divided into a balance table 34 on which the prescription bottle 110 is placed and an XY table 36 that horizontally moves the prescription bottle 110 together with the balance table 34. The XY table 36 functions as a transport means for horizontally moving the balance table 34 and eventually the prescription bottle 110 placed on the balance table 34, and an X moving mechanism for moving the balance table 34 in the x direction (depth direction). 36x and a Y moving mechanism 36y that moves the weighing platform 34 in the y direction (width direction) together with the x moving mechanism. Since both the X moving mechanism 36x and the Y moving mechanism 36y can be configured by a known publicly known technique, a detailed description thereof will be omitted. However, each moving mechanism 36x, 36y includes, for example, a motor that is a driving source or the motor. A power conversion member such as a timing belt or a lead screw that converts the driving force of the motor to a linear motion, a guide member that guides the moving direction of the weighing platform 34, and the like.

Figure 1 1 is a cross-sectional view of a weighing platform 34. The balance table 34 is a table that is transferred in the horizontal direction by the XY table 36, on which a prescription bottle 110 set in an adapter 38, which will be described in detail later, is placed. A load cell 70 is incorporated in the balance table 34, and functions as a detecting means for detecting the weight of the placed prescription bottle 110 and, consequently, the amount of liquid medicine discharged to the prescription bottle 110.

  More specifically, the balance table 34 has a connection table 62 connected to the X movement mechanism 36x. A support shaft 64 and a compression coil spring 66 inserted through the support shaft 64 are installed on the upper surface of the connection base 62. The compression coil spring 66 biases and supports the substrate 68 inserted through the support shaft 64 and biases the substrate 68 upward. When an excessively large downward load is applied to the substrate 68 and, consequently, the load cell 70 mounted on the substrate 68, for example, when an excessively heavy object is mounted on the weighing platform 34, the compression coil spring 66 is , Compressive deformation, and failure of the load cell 70 due to the excessive load is prevented.

  Two load cells 70 are provided on the upper surface of the substrate 68, and a cover plate 72 is further placed on the upper side of the two load cells 70. The load cell 70 detects the weight of the object placed on the cover plate 72 and notifies the control unit 10 of the detection result. The control unit 10 calculates the amount of liquid medicine discharged to the prescription bottle 110 based on the detected value in the load cell 70. Based on the calculated amount of liquid medicine, the driving of the discharge mechanism (such as the rotary unit 12 or the pump 20) is controlled. Specifically, the control unit 10 calculates a difference value between the detected weight value before the liquid medicine discharge and the detected weight value during the liquid medicine discharge as the discharge weight value, and the discharge weight value is indicated by the prescription data. When the target weight value is reached, the liquid medicine discharge by the discharge mechanism is terminated. In FIG. 12, only two load cells 70 are illustrated, but the load cell 70 may be a single load cell or three or more load cells.

  The cover plate 72 is a member located on the uppermost side of the balance table 34, and the prescription bottle 110 set in the adapter 38 is placed on the cover plate 72. The cover plate 72 is a member made of a lightweight metal plate, and its four corners are bent into a substantially U-shape. The bent portion functions as a groove 72 a that is located on the outer periphery of the cover plate 72 and receives the scattered liquid medicine. Two female screws (not shown) are formed on the upper surface of the balance table 34 so that the adapter 38 holding the prescription bottle 110 can be fixed via a connection bolt (not shown).

Here, in this embodiment, a prescription bottle is mounted on the balance table, and the prescription bottle is moved to the discharge position by moving the prescription bottle together with the balance table. In other words, in the present embodiment, instead of moving the original drug vial onto the prescription bottles, and moves the prescription bottle below the original vial. The weight of the prescription bottle and the balance table is much smaller than that of the rotating unit holding a plurality of original drug vials. By adopting such a configuration that moves the side of the prescription bottle having a small weight, the movement mechanism required for moving each member can be simplified and water can be produced at a lower cost compared to the conventional technique of moving the side of the prescription bottle. A drug dispensing device can be configured.

  In this embodiment, the amount of liquid medicine discharged is acquired by weight. Therefore, the liquid medicine can be discharged with higher accuracy than the conventional technique in which the liquid medicine discharge amount is detected based on the liquid level. That is, the discharge amount detection based on the liquid level is likely to cause an error due to the influence of the fluctuation of the liquid level, the bubbles contained in the liquid medicine, and the volume change accompanying the temperature change. In addition, since there are variations in the shape (inner diameter, etc.) of prescription bottles that are mass-produced, it is difficult to detect an accurate volume based on the liquid level. On the other hand, since the weight is not affected by the fluctuation of the liquid level, bubbles, temperature change, etc., if the liquid medicine amount is detected based on the weight value as in this embodiment, an accurate discharge amount is always obtained. Can be detected. And as a result, the precision of liquid medicine dispensing can be improved. However, depending on the accuracy required, the discharged liquid amount may be acquired based on the liquid level of the liquid medicine discharged into the prescription bottle 110.

[adapter]
The adapter 38 is a member that holds the mouth portion 110b of the prescription bottle 110 in a state where the height is maintained at a specified reference height. That is, the prescription bottle 110 has a different total length (height) depending on its capacity. During the dispensing process, the user selects an appropriately sized prescription bottle 110 according to the total amount of liquid medicine to be dispensed, and sets it on the balance table 34. At this time, when the prescription bottle 110 is placed directly on the balance table 34, the height of the prescription bottle mouth portion 110 b, and consequently the discharge nozzle 27 and the prescription bottle mouth portion, depending on the capacity (full length) of the prescription bottle 110. The distance from 110b will be different. As a result, for example, in the case of the prescription bottle 110 having a low overall length such as a 30 ml prescription bottle, the distance between the discharge nozzle 27 and the prescription bottle mouth portion 110b will be greatly separated, and the spraying of liquid medicine etc. Will cause problems.

  Therefore, in the present embodiment, the height of the prescription bottle opening portion 110b can be adjusted by the adapter 38 having the lifting platform 74 that can be moved up and down. FIG. 12 is a perspective view of the adapter 38. FIG. 13A is a perspective view showing a state where the small-capacity prescription bottle 110 is set in the adapter 38 and FIG. 13B is a small-capacity prescription bottle 110 set in the adapter 38.

  The adapter 38 is a member that holds the prescription bottle 110 while always maintaining the height of the prescription bottle opening 110b at the specified reference height H regardless of the capacity (full length) of the prescription bottle 110. The adapter 38 includes a base plate 73 connected to the weighing platform 34, a column 76 standing from the base plate 73, an elevator 74 that can be raised and lowered along the column 76, and a prescription bottle 110 placed on the elevator 74. The clip body 78 etc. which hold | grip the opening part 110b is provided. The base plate 73 is formed with a through hole 73a through which a connection bolt (not shown) is inserted, and the base plate 73 is screwed and fastened to the weighing platform 34 through the connection bolt. And thereby, the position of the base board 73 and by extension, the adapter 38 is fixed.

  From the corner of the base plate 73, a support 76 is erected. The support column 76 is a member having a substantially U-shaped cross section, and a guide groove 76 a for guiding the lifting and lowering of the lifting platform 74 and a plurality of locking claws 74 a provided on the lifting platform 74 are latched on its side surface. The to-be-latched part 75 is formed. The guide groove 76a extends in the vertical direction, and a moving shaft 74b inserted through the lifting platform 74 is inserted into the guide groove 76a. The guide groove 76a has a width substantially equal to the shaft diameter of the moving shaft 74b. The moving shaft 74b, and thus the vertical movement of the lifting platform 74 through which the moving shaft 74b is inserted, and the moving shaft Operations other than rotation around 74b are restricted.

  The locked portion 75 is a portion where a substantially wedge-shaped locking claw 74a formed on the lifting platform 74 is locked, and a groove 75a into which the locking claw 74a is inserted and a lower end of the groove 75a forward. And an inclined surface 75b that protrudes. The inclined surface 75b supports the bottom surface of the locking claw 74a inserted into the groove 75a. In other words, the bottom surface of the locking claw 74a inserted into the groove 75a is placed on the inclined surface 75b. It has an inclination angle. Further, the support of the locking claw 74 a by the inclined surface 75 b, in other words, the locking relationship between the locking claw 74 a and the locked portion 75 prevents the lifting platform 74 from falling, and the height of the lifting platform 74. Is maintained. The locking relationship between the locking claw 74a and the locked portion 75 is released by rotating the lifting platform 74 about the moving shaft 74b in the direction of lifting the front end surface. When the locking relationship is released, the lifting platform 74 can be lifted and lowered along the guide groove 76a.

The to-be-latched part 75 has such a height that the height of the prescription bottle opening part 110b installed on the lifting / lowering base 74 can be a specified reference height H and can be locked to the lifting / lowering base 74. Is provided. Here, the total length of the prescription bottle 110 placed on the lifting platform 74 is different for each capacity. Therefore, the height of the lifting platform 74 at which the mouth part 110b can be a prescribed reference height H differs depending on the capacity of the prescription bottle 110 to be placed. Therefore, a plurality of locked portions 75 are also provided for each selectable volume of the prescription bottle 110, in other words, for each full length of the prescription bottle 110. Specifically, in this embodiment, since five types of prescription bottles 110 for 30 ml, 60 ml, 100 ml, 150 ml, and 200 ml can be selected, five locked portions 75 are also provided. It has been. Among these, the locked portion 75 corresponding to the 30 ml medication bottle having the lowest overall length is provided at the highest position, and conversely, the locked portion 75 corresponding to the 200 ml medication bottle having the highest overall length is the lowest. In the position.

  On the front surface of the support column 76, a scale 76b indicating the height of the lifting platform 74 that allows the height of the mouth 110b to be a prescribed reference height H is attached for each volume (full length) of each prescription bottle 110. Yes. The presence of the scale 76b can reduce misadjustment of the height of the lifting platform 74.

  The elevating table 74 is a table on which the prescription bottle 110 is placed, and a pair of locking claws 74a is formed at its end. Each locking claw 74a is a claw that is locked to the above-described locked portion 75, and has a substantially wedge-shaped shape that becomes narrower as it approaches the tip. The locking claw 74 a is locked to the locked portion 75, thereby preventing the lifting platform 74 from falling. A moving shaft 74b that is inserted through the guide groove 76a is inserted in the vicinity of the locking claw 74a. By inserting the moving shaft 74b into the guide groove 76a, the lifting platform 74 is only allowed to rotate around the moving shaft 74b and to move up and down along the guide groove 76a.

  In the vicinity of the upper end of the column 76, a clip body 78 is provided for sandwiching the mouth 110 b of the prescription bottle 110 placed on the lifting platform 74. The clip body 78 functions as a prescription bottle holding means for holding the prescription bottle placed on the lifting platform, and a pair of sandwiching pieces 78a and springs that bias the pair of sandwiching pieces 78a toward each other ( (Not shown). The clip body 78 sandwiches the prescription bottle opening 110b, so that the prescription bottle 110 is prevented from falling.

  Here, the maximum opening of the clip body 78 (the interval between the pair of clamping pieces 78a) is smaller than the prescription bottle body 110a, and the prescription bottle body 110a cannot be held. With such a configuration, even if the height of the lifting platform 74 is erroneously set to be high, the user can easily recognize the error. For example, when a 200 ml prescription bottle with a high overall length is placed, naturally, the lifting / lowering base 74 must be adjusted to a lower height. However, it is assumed that the user accidentally adjusts the height of the lifting platform 74 to a higher position that is not suitable for 200 ml. In this case, the prescription bottle mouth part 110 b placed on the higher lift 74 is located above the clip body 78, and the prescription bottle body part 110 a is located in the vicinity of the clip body 78. As a result, the prescription bottle 110 cannot be clamped by the clip body 78, and the prescription bottle 110 is in an unstable state. By being in such an unstable state, the user can easily recognize a setting error of the height of the lifting platform 74 and can reduce adjustment errors of the lifting platform 74. As a result, it is possible to prevent interference between the prescription bottle opening 110b that has become higher than the prescribed reference height H and other members.

  Further, as is apparent from the above description, by using the adapter 38 in which the height of the elevating table 74 on which the prescription bottle 110 is placed is variable, the height of the prescription bottle mouth portion 110b is set to its capacity (full length). Regardless, it can always be kept at the prescribed reference height H. As a result, it is possible to prevent the liquid medicine from being scattered and the like caused by an excessive distance between the prescription bottle opening 110b and the discharge nozzle 27.

  In the present embodiment, the height of the lifting platform 74 is configured to be variable only in stages, but of course, it may be configured to be continuously variable. Further, the height of the lifting platform 74 may be changed not automatically but automatically, for example, by electric drive. In the case where the height of the lifting platform 74 can be automatically changed, for example, it is automatically optimized based on the total amount of liquid medicine to be dispensed calculated based on prescription data input by the user. The capacity of the prescription bottle 110 may be calculated, and the lifting platform 74 may be automatically moved to the optimum height according to the calculated capacity of the prescription bottle 110. In addition, the distance between the prescription bottle 110 and the discharge nozzle 27 is not adjusted by the adapter 38, but the scale 34 and the rotary unit 12 are configured to be movable up and down, and the height of these is adjusted to discharge the prescription bottle 110 and the discharge nozzle 27. The distance from the nozzle 27 may be adjusted.

[Prescription bottle inspection]
Next, the inspection of the prescription bottle 110 will be described. The size of the prescription bottle 110 should be appropriately selected according to the total amount of liquid medicine to be dispensed. In addition, the prescription bottle 110 must be set with the lid removed. However, due to a human error or the like, there is a case where the prescription bottle 110 having the wrong size or the prescription bottle 110 with the lid attached is set. In this case, problems such as overflowing and splashing of liquid medicine occur. For example, when dispensing a 200 ml liquid medicine, if a 100 ml prescription bottle 110 is set by mistake, the liquid medicine overflows from the prescription bottle 110 during the dispensing process (liquid medicine discharge process). End up. Further, when the prescription bottle 110 is set with the lid attached, naturally, the discharged liquid medicine does not enter the prescription bottle 110 and scatters around it. Therefore, in this embodiment, the quality of the prescription bottle 110 that is set is inspected before the liquid medicine discharge is executed. This will be described in detail with reference to FIGS. FIG. 14 is a diagram for explaining the installation positions of the lid sensor 42 and the size sensor 40, and is a view in the A direction in FIG.

  Prior to the dispensing process, the weighing platform 34 stands by at a predetermined standby position S (see FIG. 2). The user sets the adapter 38 holding the prescription bottle 110 on the balance table 34 located at the standby position S. When the dispensing process is started, the balance table 34 moves horizontally along with the placed prescription bottle 110 and enters the discharge space R, which is a space directly below the rotary unit 12, via the discharge inlet 80. Then, the prescription bottle 110 is moved to a position just below the required original drug bottle 100, and the liquid medicine is discharged.

  In the present embodiment, a lid sensor 42 and a size sensor 40 are provided in the vicinity of the discharge inlet 80 positioned between the discharge space R and the standby position S, and the detection results of the two sensors 42 and 40 are used. Thus, the quality of the prescription bottle 110 is judged.

  The lid sensor 42 is an optical sensor that irradiates the inspection light beam L1 and detects the presence or absence of the object, the distance to the object, and the like based on the state of the reflected light of the inspection light beam L1. As shown in FIG. 14, the lid sensor 42 is installed at the upper end of the discharge inlet 80, in other words, directly above the movement path of the prescription bottle 110. Then, the lid sensor 42 irradiates the inspection light beam L1 from the upper side toward the prescription bottle 110 passing underneath. At this time, when the lid is attached to the prescription bottle 110, the inspection light beam L1 comes into contact with the surface of the lid and is reflected. When the reflected light is received, the lid sensor 42 outputs an electrical signal indicating that to the control unit 10. The control unit 10 that has received the signal determines that the lid is attached to the prescription bottle 110. In the state where the lid is attached, the liquid medicine dispensing process cannot be properly executed. In this case, the control unit 10 outputs an error and interrupts the dispensing process currently being executed.

  Similarly to the lid sensor 42, the size sensor 40 (40a, 40b) emits the inspection light beams L2, L3, and the presence / absence of an object and the object based on the reflected light state of the inspection light beams L2, L3. It is an optical sensor that detects the distance to the The size sensor 40 is provided for judging whether the size of the prescription bottle 110 is good or not, and is located at a side end of the discharge inlet 80, in other words, at a position shifted in the horizontal direction with respect to the movement path of the prescription bottle 110. is set up. In the present embodiment, as the size sensor 40, two sensors, that is, a first size sensor 40a and a second size sensor 40b are provided.

  The first size sensor 40a is a sensor provided for determining whether the height of the prescription bottle opening portion 110b is acceptable. The first size sensor 40a irradiates the inspection light beam L2 at a position slightly below the clip body 78 of the adapter 38, and the mouth 110b of the prescription bottle 110 based on the state of the reflected light obtained at that time. It is detected whether or not has reached the vicinity of the clip body 78. As a result of the detection, when the prescription bottle mouth part 110b does not reach the vicinity of the clip body 78, the control unit 10 determines that the prescription bottle 110 smaller than the prescription bottle 110 to be originally set is set. In this case, the control unit 10 outputs an error and ends the dispensing process.

  The second size sensor 40b is a sensor provided for determining whether the height of the lifting platform 74 is good or bad. The sensor 40b for 2nd sizes irradiates the raising / lowering stand 74 of the adapter 38 with the test | inspection light beam L3, and detects the height of the raising / lowering stand 74 based on the state of the reflected light obtained at that time. Here, the height of the lifting platform 74 can be adjusted in a plurality of stages. Therefore, a plurality of second size sensors 40b are provided as many as the height of the selectable lifting platform. The control unit 10 determines whether or not the height of the lifting platform 74 detected by the second size sensor 40b is appropriate. That is, the control unit 10 sets the size of the prescription bottle 110 to be set based on prescription data input by the user in advance and the height of the lifting platform 74 corresponding to the size of the prescription bottle 110 as the target height. Calculate. Then, it is determined whether or not the height of the lifting platform 74 detected by the second size sensor 40b matches the calculated target height. As a result of the determination, if the two do not match, the control unit 10 determines that the height of the lifting platform 74 is inappropriate. In this case, the control unit 10 notifies the error and ends the dispensing process. In the present embodiment, a plurality of second size sensors 40b are provided to correspond to the height-variable lifting platform 74. However, if the second size sensor 40b is movable, the second size sensor 40b can be moved. The number of sensors 40b may be single instead of plural. When the second size sensor 40b is a single sensor, the second size sensor 40b is moved to the target height calculated from the prescription data prior to the height detection of the lifting platform 74. Just keep it.

  Thus, prior to the discharge of liquid medicine, it is inappropriate to determine the presence or absence of a lid and the quality of the prescription bottle (the quality of the mouth height and the height of the lifting platform). It is possible to reliably prevent overflowing or splashing of liquid medicine caused by setting a prescription bottle. In addition, the inspection method of the prescription bottle 110 demonstrated here is an example, and may be changed or abbreviate | omitted suitably.

[Original medicine bottle management]
Next, management of the original drug vial 100 performed in this liquid medicine dispensing device will be described. As described above, in the present apparatus, nine original drug vials 100 are set in total, three for each rotating unit 12. The storage unit 22 stores a characteristic information table indicating the characteristics of each liquid medicine and a position information table indicating the set positions of the nine original drug bottles 100. FIG. 15A and FIG. 15B are examples of the characteristic information table 82 and the position information table 84, respectively. The characteristic information table 82 stores information necessary for liquid medicine discharge processing and quality control, such as specific gravity of each liquid medicine, viscosity, necessity of stirring, expiry date, liquid medicine type for which mixing is prohibited. ing. In the position information table 84, the set position of the original drug vial 100 and the liquid medicine type to be set at the set position are stored in association with each other. The characteristic information table 82 and the position information table 84 may be created by the user operating the operation unit 18 or may be transmitted from an external computer via a network or the like.

  When executing the liquid medicine dispensing process, the control unit 10 refers to the characteristic information table 82 and the position information table 84 to control the opening / closing control of the various valves 26 and 28, the driving of the XY table 36, and the like. Specifically, the control unit 10 interprets prescription data input by the user, and specifies the liquid medicine type necessary for the dispensing process. Then, referring to the position information table 84, whether or not the specified liquid medicine is set in the rotary unit 12 and, if set, the position of each liquid medicine is confirmed. When the liquid medicine required for dispensing is not set, the control unit 10 outputs an error and stops the dispensing process. On the other hand, when all the necessary liquid medicines are set in the rotary unit 12, the control unit 10 indicates the volume for each liquid medicine based on the specific gravity of each liquid medicine recorded in the characteristic information table 82. The target discharge amount is converted into weight. Also, if necessary, the viscosity of each liquid medicine and the necessity of stirring are also confirmed and used for controlling the discharge operation.

  By the way, when the liquid medicine stored in the original drug vial 100 runs out, or when the expiration date is reached, the user replaces the original drug vial 100 with a new original drug vial 100. If the setting position of the original drug vial 100 is mistaken at the time of replacement, accurate dispensing cannot be performed, which is a big problem. For example, if the liquid medicine b is erroneously set on the right back side where the liquid medicine a is to be set, the liquid medicine b is discharged with the intention of discharging the liquid medicine a. In order to prevent such an error in the setting position of the original drug vial 100, in the present embodiment, the set position of each original drug vial 100 is confirmed using a barcode. This will be described in detail with reference to FIG. FIG. 16A is a schematic top view of the periphery of the rotary unit 12 in the advanced state, and FIG. 16B is a schematic view in the direction B in FIG.

  As described above, the rotating unit 12 that functions as the holding means for the original drug vial 100 is freely movable in the direction in which the original drug vials 100 are arranged. When exchanging the original drug vial 100, the rotating unit 12 is advanced to the advance position where all the three original drug vials 100 held are exposed to the outside, and the original drug vial 100 is exchanged. When the replacement of the original drug vial 100 is completed, the rotary unit 12 is retracted and returned to the original position.

  Of the advancing / retreating passage 23 in which the rotating unit 12 advances and retreats, the surface is opposed to the original drug vial 100 held by the rotating unit 12 and is located in the vicinity of the rear end of the rotating unit 12 in the advanced state (exit of the advancing / retreating passage 23 A bar code reader 24 is installed in the vicinity). The barcode reader 24 functions as a reading unit that sequentially reads the barcodes 102 and 54 attached to the original drug vial 100 and the attaching plate 52c of the holding bar 52.

  The bar code reader 24 is fixedly installed at a specified position, but by interlocking with the advance / retreat operation of the rotary unit 12, a single bar code 102, 54 can be read sequentially. . That is, when the rotary unit 12 advances and retreats, the barcodes 102 and 54 attached to the original drug vial 100 and the attaching plate 52c sequentially pass through the front of the barcode reader 24. By sequentially reading the barcodes 102 and 54 passing through the front, a plurality of barcodes 102 and 54 can be read even with a single barcode reader 24 fixedly installed. In other words, according to the present embodiment, it is not necessary to provide a plurality of barcode readers or a moving mechanism for moving a single barcode reader in order to read the plurality of barcodes 102 and 54. . As a result, information on the type and position of the original drug vial can be acquired with a relatively simple and inexpensive configuration.

  Based on the reading result of the barcode reader 24, the control unit 10 determines the type of liquid medicine stored in each original drug vial 100 and its set position. Then, based on the comparison between the determination result and the position information table 84 stored in the storage unit 22, the quality of the set position of the original drug vial 100 is determined. When it is determined that the set position is incorrect, the control unit 10 notifies the error and prompts the user to replace the original drug vial 100 again. Various error notification modes are conceivable. For example, when a light emitter 83 such as an LED is provided on the cover of each rotation unit 12 and the original drug vial 100 is set by mistake, The light emitter 83 may be turned on. Moreover, as another aspect, you may make it display the figure etc. which show the position of the original drug vial 100 set to the indicator 16a accidentally. In any case, according to the present embodiment, when the original drug vials 100 are set, the quality of the setting positions of the original drug vials 100 is determined. As a result, it is possible to reliably determine whether or not a liquid medicine necessary for the dispensing is set before the dispensing process is started.

In the present embodiment, the quality of the set position of the original drug vial 100 is determined based on the comparison with the position information table 84 stored in advance, but based on the reading result by the barcode reader 24. The position information table 84 may be corrected. For example, when the liquid medicine a is to be set and the liquid medicine d is set in the right back, an error is not output, but the contents of the position information table 84 stored in the storage unit are corrected. It may be. And when performing a liquid medicine dispensing process, based on this position information table 84 after correction | amendment, you may make it perform the presence or absence and position confirmation of the liquid medicine required for dispensing.

  By the way, in this embodiment, not only the drug type barcode 102 indicating the liquid drug type but also the position barcode 54 indicating the position is provided. This is for surely grasping the position of each original drug vial 100 even when the number of original drug vials 100 to be set is less than the settable number. That is, when three original drug vials 100 are set in the rotation unit 12 in which the number of original drug vials 100 that can be set is three, the barcode for the drug type is provided even if the position barcode 54 is not provided. Since the arrangement order of the original drug vials 100 can be determined from the reading order of 102, the position of each original drug vial 100 can be grasped. On the other hand, when only one original drug bottle 100 is set in the three rotation units 12 where the number of original drug bottles 100 can be set, the liquid medicine type of the one original drug bottle 100 is based on the drug type barcode 102. Can be determined, but it cannot be determined whether the set position is the back side, the near side or the center of the rotary unit 12.

  In the present embodiment, in order to solve such a problem, not only the medicine type barcode 102 attached to the original drug vial 100 but also the position barcode 54 attached to the attaching plate 52c are read. ing. Thereby, even if the number of sets of the original drug vials 100 is less than the settable number, the set position of each original drug vial 100 can be surely grasped.

  In this embodiment, a barcode is used as an identifier for the type and position of the liquid medicine. However, other identifiers such as an IC tag may be used instead of the barcode. Moreover, the management method of the original drug vial 100 described here is an example, and may be changed or omitted as appropriate.

[Dispensing control]
Next, the flow in the case of actually performing a dispensing process using this liquid medicine dispensing device will be described. FIG. 17 is a flowchart showing the flow of the dispensing process. When executing the dispensing process, first, the user inputs the type of liquid medicine to be dispensed and its capacity (volume) to the liquid medicine dispensing apparatus as prescription data (S10). The control unit 10 compares the input dispensing data with the position information table stored in the storage unit 22, and specifies the position of the liquid medicine (original drug bottle) necessary for dispensing (S12). When the original drug vial 100 necessary for dispensing is not set in the rotating unit 12, the control unit 10 outputs an error and ends the dispensing process. At this time, the dispensing process is not ended, but only a discharge operation related to the liquid medicine set in the rotating unit 12 among a plurality of liquid medicines necessary for the dispensing is executed, and the liquid medicine that is not set. May notify the user of a message indicating that it will be performed manually.

  If the position of the liquid medicine can be confirmed, then, the control unit 10 calculates the target weight of the liquid medicine to be discharged (S12). That is, normally, in a prescription, the amount of liquid medicine to be dispensed is indicated by volume. The control unit 10 refers to the characteristic information table 82 stored in the storage unit 22, converts the liquid medicine amount indicated by the volume into a weight, and temporarily stores it in the storage unit 22 as a target weight. Thereafter, the control unit 10 stands by until an instruction to start dispensing is given from the user (S14).

  On the other hand, when the user inputs prescription data, the prescription bottle 110 having a size corresponding to the total amount of liquid medicine to be dispensed is set on the adapter 38 and placed on the balance table 34. At this time, the user adjusts the height of the lifting platform 74 of the adapter 38 to a height corresponding to the total length of the prescription bottle 110, and holds the mouth 110 b of the prescription bottle 110 with the clip body 78. The lid of the prescription bottle 110 is removed in advance. When the setting of the prescription bottle 110 is completed, the user operates the operation unit 18 to instruct the start of the discharge process.

  Upon receiving this instruction, the control unit 10 drives the XY table 36 to move the weighing platform 34, and thus the prescription bottle 110, to the discharge space R that is the space immediately below the rotation unit 12. During this movement, the prescription bottle 110 passes through the discharge inlet 80 in which the lid sensor 42 and the size sensor 40 are installed. If the prescription bottle 110 moves to the discharge inlet 80, both sensors 40 and 42 respectively irradiate detection light toward the prescription bottle 110 to detect the presence or absence of a lid. The control unit 10 determines whether the prescription bottle 110 is acceptable based on the detection result (S16). That is, the presence or absence of a lid is determined based on the detection result of the lid sensor 42, and the quality of the prescription bottle 110 is determined based on the detection result of the size sensor. As a result of the determination, when it is determined that the lid is attached or the size of the prescription bottle 110 is inappropriate, the control unit 10 outputs an error and ends the dispensing process (S24).

  On the other hand, when it is determined that an appropriate prescription bottle 110 is set, the control unit 10 drives the XY table 36 to position the prescription bottle 110 directly below the original drug bottle 100 storing the liquid medicine to be dispensed. (S18). When the prescription bottle 110 moves to the discharge position, the various valves 26 and 28, the rotary unit 12 and the like are driven to start the liquid medicine discharge process (S20).

  FIG. 18 is a flowchart showing a detailed flow of the discharge process. FIG. 19 is an image diagram showing the state of the discharge process. When the liquid medicine is discharged, the control unit 10 first closes the atmospheric pressure release valve 31 and the discharge valve 26 and opens the switching valve 28 corresponding to the original drug vial 100 related to the discharge (S26). Thereby, the original drug vial 100 related to the discharge and the pump 20 are connected.

  Subsequently, the rotation mechanism 48 provided in the rotation unit 12 is driven to rotate the rotation plate 44 by approximately 180 degrees, and the original drug vial 100 is turned over (S28). Due to this overturn, the liquid medicine stored in the original drug vial 100 is agitated. As a result, liquid medicines containing precipitates and liquid medicines that require pre-stirring, such as liquid medicines of two-component mixing type with different specific gravity, should be in a state suitable for discharge. Can do. Of course, depending on the type of liquid medicine, it may not be sufficiently agitated by a single overturning operation. In that case, a fall operation and a return operation for returning the original drug vial 100 to the normal posture may be repeated. Moreover, in this embodiment, after moving the prescription bottle 110, in other words, immediately before the liquid medicine is actually discharged, the original drug vial 100 is turned over, but this order is reversed or simultaneous. Also good. That is, the prescription bottle 110 may be moved after the original medicine bottle 100 is overturned or while the original medicine bottle 100 is overturned. In addition, when stirring means other than overturning (for example, vibration generating means) are provided, or when the liquid medicine stored in the original drug vial 100 is not required to be stirred, the original drug vial 100 is attached to the rotary unit 12. When set, it falls, in other words, the original drug vial 100 may always be kept in a fall state.

  Here, when the original drug vial 100 falls, naturally, the liquid medicine stored in the original drug vial 100 moves in the direction of the original drug vial port 100b, and in the vicinity of the bottom of the original drug vial 100, there is a space. Is formed (see FIG. 19). And the front-end | tip (equivalent to a lower end in a normal attitude | position) of the air nozzle 29 penetrated to the bottom part vicinity of the original drug bottle 100 protrudes from the liquid level of a liquid medicine. Therefore, in the overturned state, air discharged from the air nozzle 29 is released into the space, and bubbles generated by releasing air into the liquid medicine can be prevented.

  The discharge nozzle 27 is formed so as to protrude from the special cap 25 attached to the original drug vial opening 100b. In other words, it can be said that the discharge nozzle 27 extends from the upper end of the original drug vial 100 (corresponding to the lower end in the fall state). Therefore, in the fall state, even if the remaining amount of liquid medicine is reduced, the tip of the discharge nozzle 27 (corresponding to the lower end in the normal posture) is located in the liquid medicine. As a result, even if the amount of stored liquid medicine decreases, liquid medicine can be discharged through the discharge nozzle 27.

  If the original drug vial 100 falls, the control unit 10 then drives the pump 20 to supply air to the original drug vial 100 (S30). By this air, the inside of the original drug vial 100 is in a pressurized state. By this pressurization, even a highly viscous liquid medicine can be easily discharged. Further, by applying pressure, a small amount of liquid medicine that has entered the air nozzle 29 can be discharged to the outside of the air nozzle 29 during the overturning operation. In addition, you may vary the amount of pressurization at this time according to the viscosity etc. of the liquid medicine to discharge. In other words, liquid medicine with high viscosity is harder to be dispensed than liquid medicine with low viscosity, so liquid medicine with high viscosity has a higher pressurization amount than liquid medicine with low viscosity. You may make it be in the state where it is easy to be done. The pressurizing process may be performed before the original drug vial 100 is overturned, but it is preferable that the pressurization process is performed after the overturning in consideration of releasing the liquid medicine to the air nozzle 29 during the overturning operation.

  When the pressurization is completed, the discharge valve 26 provided in the discharge nozzle 27 is opened (S32). As the discharge valve 26 is opened, the liquid medicine stored in the original drug vial 100 is discharged through the discharge nozzle 27. Here, as discharge continues, the internal pressure of the original drug vial 100 gradually decreases. And when the said internal pressure falls below atmospheric pressure, discharge operation will be inhibited significantly. Therefore, when a certain time has elapsed since the discharge valve 26 was opened, the atmospheric pressure release valve 31 connected to the air nozzle 29 is opened. Thereby, since the internal pressure of the original drug vial 100 is always kept at atmospheric pressure, lubrication can be discharged. Dust and the like entering through the atmospheric pressure release valve 31 are removed by a filter 32 provided on the front side of the original drug vial 100. Further, in this embodiment, the stagnation of the discharge operation is prevented by releasing the atmospheric pressure, but even if the internal pressure of the original drug vial 100 is reduced due to the discharge of liquid medicine, the internal pressure does not fall below the atmospheric pressure. In addition, stagnation of the discharge operation may be prevented by sufficiently applying pressure in advance according to the target discharge amount. In this case, since it is not necessary to release the atmospheric pressure, the atmospheric pressure release valve 31 and the filter 32 may be omitted.

  After the discharge valve 26 is opened, the control unit 10 monitors the discharge weight of the liquid medicine based on the detected value in the load cell 70 provided on the balance table 34 (S34). At this time, when the detection value in the load cell 70 does not change for a certain period of time despite the discharge valve 26 being opened, the control unit 10 determines that the original drug vial 100 has become empty. In this case, the control unit 10 prompts the user to replace the original drug vial 100 by displaying a message on a display screen or the like. And if the original medicine bottle which became empty by the user is removed and the new original medicine bottle 100 is set, the control part 10 will restart discharge operation again.

  When the discharge weight detected by the load cell 70 reaches the target weight calculated based on the prescription data, the discharge valve 26 is closed (S36). Here, the discharge valve 26 is closed when the control unit 10 outputs a closing signal to the discharging valve 26. This closing signal is output before the discharge weight reaches the target weight. . This is because the response time of the discharge valve 26 is taken into consideration. This will be briefly described with reference to FIG. FIG. 20 is a graph showing the relationship between the liquid medicine discharge weight and the elapsed time.

  Usually, there is a short time, that is, a so-called response time ΔT from when the control unit 10 outputs a closing signal to when the discharge valve 26 is actually closed. Since the discharge valve 26 is not closed during the response time ΔT, naturally, the discharge of liquid medicine is continued. Therefore, when the closing signal is output at the time point ta when the discharge weight reaches the target weight Mp, an extra amount of liquid medicine amount ΔM discharged during the response time ΔT is discharged, and as a result, the total discharge The weight will exceed the target weight.

  Therefore, in this embodiment, the response time ΔT of the discharge valve 26 and the liquid medicine weight ΔM discharged at the response time ΔT are measured in advance. Then, the closing signal is output at time tb when the discharge weight detected by the load cell 70 reaches a value (Mp−ΔM) obtained by subtracting the response discharge weight ΔM from the target weight Mp. Thus, the accuracy of the liquid medicine discharge process can be further improved by outputting the closing signal early in consideration of the response time ΔT. Of course, if the type of the discharge valve 26 is the same, the response time ΔT is almost the same regardless of the type of liquid medicine, but the liquid weight ΔM discharged at the response time ΔT is the liquid medicine weight. It depends on the type, especially the viscosity. Specifically, a liquid medicine having a low viscosity has a larger liquid medicine weight ΔM discharged at a response time ΔT than a liquid medicine having a high viscosity. Therefore, it is desirable that Mp−ΔM, which is a weight value at the time of outputting the closing signal, varies depending on the type of liquid medicine. Of course, depending on the required accuracy, a closing signal is output when the discharge weight reaches the target weight, in other words, the response time ΔT of the discharge valve 26 may not be considered.

  Again, the flow of the discharge process will be described with reference to FIG. When the discharge valve 26 is closed, the control unit 10 drives the pump 20 and the like to return the liquid medicine remaining in the discharge nozzle 27 to the original drug vial 100. Specifically, the pump 20 is driven with the atmospheric pressure release valve 31 closed, and the air inside the original drug vial 100 is sucked (S38). Thereby, the internal pressure of the original drug vial 100 decreases. In this state, when the discharge valve 26 is opened for a short time, the liquid medicine remaining in the discharge nozzle 27 is retracted into the original drug vial 100 due to the difference between the internal and external pressures (S40). Thereafter, the discharge valve 26 is closed, the rotary unit 12 is rotated, and the original drug vial 100 is returned to the normal posture (S42). At this time, since the liquid medicine remaining in the discharge nozzle 27 is returned to the original drug vial 100, the remaining liquid medicine does not scatter when it falls.

  If the discharge operation of one kind of liquid medicine is completed in the above procedure, the control unit 10 proceeds to step S22 (see FIG. 17), and determines whether all the dispensing processes have been completed. That is, in the dispensing process, discharge of a plurality of types of liquid medicine is required, and it is determined whether or not all the specified types of liquid medicine discharge have been completed. If there is a liquid medicine that has not yet been discharged, the process returns to step S18, and the discharge process of step S20 is repeated. On the other hand, when all the specified types of liquid medicine discharge have been completed, the dispensing process ends. In this case, the control unit 10 drives the XY table 36 to return the weighing platform 34 and thus the prescription bottle 110 to the standby position S.

  As is clear from the above description, according to the present embodiment, since the plurality of original drug vials 100 are toppled in an interlocking manner, the number of motors and transmission mechanisms required for the original drug vial 100 to fall can be reduced. As a result, appropriate dispensing is possible with a simpler configuration.

It is a block diagram which shows the structure of the liquid medicine dispensing apparatus which is embodiment of this invention. It is a perspective view of a liquid medicine dispensing device. (A) is a perspective view of an original drug vial, (b) It is sectional drawing of the opening part periphery of an original drug vial. It is a figure which shows an example of a prescription bottle. It is a perspective view of a rotation unit. It is a schematic exploded perspective view of a rotation unit. It is a perspective view of a rotation unit in the state where a holding bar was opened. It is a schematic side view of a rotation unit. It is the perspective view which looked at the rotation unit from the stationary plate side. It is a perspective view of a moving scale unit. It is sectional drawing of a balance stand. It is a perspective view of an adapter. It is a perspective view which shows a mode when a prescription bottle is set to the adapter. FIG. 3 is a schematic view in the direction A in FIG. 2. It is a figure which shows an example of the data memorize | stored in the memory | storage part. (A) is a schematic top view around a rotating unit, and (b) is a schematic view in the direction B in (a). It is a flowchart which shows the flow of a liquid medicine dispensing process. It is a flowchart which shows the flow of a liquid medicine discharge process. It is an image figure which shows the mode of liquid medicine discharge. It is a graph which shows the relationship between discharge weight and elapsed time.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Control part, 12 Rotation unit, 14 Moving scale unit, 18 Operation part, 19 Drawer tray, 20 Pump, 22 Storage part, 23 Advance / retreat passage, 24 Bar code reader, 25 Special cap, 26 Discharge valve, 27 Discharge nozzle, 28 Switching valve, 29 Air nozzle, 31 Atmospheric pressure release valve, 32 Filter, 34 Scale stand, 36 XY table, 38 Adapter, 40 Size sensor, 42 Lid sensor, 44 Rotating plate, 46 Fixed plate, 48 Rotating mechanism, 50 Holding Member, 52 holding bar, 54 position bar code, 56 rail, 58 guide groove, 66 compression coil spring, 70 load cell, 72 cover plate, 74 lifting platform, 76 strut, 78 clip body, 80 discharge inlet, 82 characteristic information table, 84 Location information table, 100 original medicine bottle, 02 medicine type barcode 110 prescription bottles, R discharge space, S the standby position.

Claims (7)

A liquid medicine dispensing device that dispenses liquid medicine by discharging one or more kinds of liquid medicine from an original drug bottle to a prescription bottle,
A rotation unit that rotates the plurality of original drug vials in conjunction with each other by rotating while holding a plurality of original drug vials arranged in a predetermined direction,
A discharge nozzle connected to each original drug vial;
An openable and closable discharge valve provided for each discharge nozzle;
A transport mechanism for transporting the prescription bottle in the lower space of the rotation unit;
Detecting means for detecting the amount of liquid medicine discharged into the prescription bottle;
Control means for controlling the drive of the rotary unit, discharge valve, and transport mechanism. At least the liquid medicine is to be rotated by rotating the rotary unit before the liquid medicine discharge is started, and the transport mechanism is driven. After moving the prescription bottle to the position just below the original drug vial to be discharged, the discharge valve corresponding to the original drug vial to be discharged is opened until the detection value of the detection means reaches the target value, and the liquid medicine Control means for discharging
A liquid medicine dispensing device comprising: A liquid medicine dispensing device according to claim 1,
The rotating unit is
A fixed body,
A rotating body that holds a plurality of original drug vials and is rotatably held with respect to a fixed body,
Between the fixed body and the rotating body, an interposed body provided at a position substantially concentric with the rotating shaft of the rotating body,
Have
A liquid medicine dispensing device, characterized in that a wire rod having one end connected to a rotating body or an original drug bottle held by the rotating body and the other end connected to a fixing member is wound around an intervening body. The liquid medicine dispensing device according to claim 1 or 2, further comprising:
An air nozzle connected to the original drug vial and guiding air to the original drug bottle;
A pump connected to the original drug vial via the air nozzle and pressurizing the inside of the original drug vial;
Liquid medicine dispensing device comprising a Bei Elko a. A liquid medicine dispensing device according to claim 3,
The liquid medicine dispensing device , wherein the pump pressurizes the inside of the original drug vial after the rotation unit rotates. The liquid medicine dispensing device according to claim 3 or 4, further comprising:
A liquid medicine dispensing device comprising an atmospheric pressure release valve connected to an air nozzle and opened when discharging liquid medicine to open an original drug bottle at atmospheric pressure. The liquid medicine dispensing device according to claim 5, further comprising:
A liquid medicine dispensing device comprising a filter that is provided between an atmospheric pressure release valve and an original drug bottle and removes foreign matter that has entered through the atmospheric pressure release valve. A liquid medicine dispensing device according to any one of claims 3 to 6,
The control unit is configured to return the liquid medicine remaining in the discharge nozzle to the original drug vial by driving the pump and depressurizing the valve when the detection value in the detection unit reaches the target value. Liquid medicine dispensing device.

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