JP2018118778A - Packaging equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging device capable of improving the detection accuracy of the remaining amount of packaging material. A control section intermittently conveys a packaging material by a conveyance section, and while the conveyance section is conveying the packaging material, the control section stops driving a winding body and the conveyance section While the conveyance of the packaging material is stopped, the drive unit controls the movement of the winding body so that the packaging material is unwound from the winding body until the position detecting unit detects that the displacement member is in the fixed position. Perform the drive. Every time the control unit drives the winding body by the driving unit, the control unit starts driving the winding body by the driving unit until the position detecting unit detects that the displacement member is in the home position. In the meantime, the drive amount of the drive unit is measured, and the remaining amount of the packaging material in the wound body is calculated based on the measurement result. The control unit updates the remaining amount determination result stored as the remaining amount of the packaging material based on the plurality of calculation results. [Selection diagram] Fig. 17

Description

  The present invention relates to a packaging device for packaging an object to be packaged in a packaging material.

  A conventional packaging device is a packaging material unwound from a wound body, and sequentially wraps a packaging object. The wound body is configured by winding a long sheet-like packaging material. In JP-A-2005-231876 (Patent Document 1), a disc is attached concentrically with a support shaft to which roll paper is attached, and a plurality of holes are arranged at predetermined intervals on the peripheral edge of the disc. A configuration is disclosed in which the amount of rotation of the disc is determined from the detected number of holes, and the remaining amount of roll paper is determined from the amount of rotation of the disc.

Japanese Patent Application Laid-Open No. 2005-231876

  If the wound body is rotated at an excessive speed relative to the remaining amount of the packaging material in the wound body, the stepping motor that drives the wound body may be stepped out or the packaging material may be loosened. Therefore, it is desired to accurately detect the remaining amount of the packaging material.

  The objective of this invention is providing the packaging apparatus which can improve the detection accuracy of the residual amount of a packaging material.

  A packaging device according to the present invention includes a drive unit that generates a driving force for rotating a wound body around which a long sheet-like packaging material is wound to unwind the packaging material from the wound body, and the wound body In a direction crossing the transport path, a packaging section that sequentially wraps the packaging object using the packaging material that has been unwound from, a transport section that transports the packaging material unwound from the wound body along the transport path, and A tension applying unit that has a displaceable displacement member and applies a tension to the packaging material when the displacement member presses the packaging material, a position detection unit that detects the position of the displacement member, a drive unit, and a conveyance unit A control unit for controlling. A fixed position is set for the displacement member. The position detector can detect whether or not the displacement member is in a fixed position. The control unit intermittently conveys the packaging material by the conveyance unit, stops the driving of the wound body by the driving unit while carrying the conveyance of the packaging material by the conveyance unit, and conveys the packaging material by the conveyance unit The winding unit is driven by the drive unit so that the displacement member is unwound from the wound body until the position detection unit detects that the displacement member is in a fixed position. . The control unit starts driving the winding body by the driving unit every time the driving unit is driven by the driving unit until the position detecting unit detects that the displacement member is in a fixed position. In the meantime, the drive amount of the drive unit is measured, and the remaining amount of the packaging material in the wound body is calculated based on the measurement result. The control unit updates the remaining amount determination result stored as the remaining amount of the packaging material based on a plurality of calculation results of the remaining amount of the packaging material.

  In the packaging apparatus, the control unit compares the latest calculation result with the remaining amount determination result every time the remaining amount of the packaging material in the wound body is calculated, and the latest calculation result is more than the remaining amount determination result. When the number of times determined to be small is equal to or greater than the threshold, the remaining amount determination result is updated.

  In the packaging apparatus, the control unit compares the latest calculation result with the remaining amount determination result every time the remaining amount of the packaging material in the wound body is calculated, and the latest calculation result is more than the remaining amount determination result. When the number of times of continuous determination is smaller than the threshold, the remaining amount determination result is updated.

  In the packaging device, the control unit compares the latest calculation result with the remaining amount determination result every time the remaining amount of the packaging material in the wound body is calculated, and the calculation based on the latest calculation result and the previous calculation. When the latest calculation result is smaller than the remaining amount determination result and the number of times that the latest calculation result is consistent with the calculation result of the previous calculation exceeds the threshold, the latest Is calculated as a new remaining amount determination result.

  In the packaging apparatus, the drive unit is a stepping motor, and the control unit measures the number of drive pulses of the stepping motor as the drive amount of the drive unit.

  In the packaging apparatus, the control unit measures the drive time of the drive unit as the drive amount of the drive unit.

  In the packaging apparatus, the control unit sets the rotation speed of the driving unit according to the remaining amount of the packaging material in the wound body.

  According to the present invention, the detection accuracy of the remaining amount of the packaging material can be improved.

It is a perspective view which shows the external appearance of a chemical | medical agent supply apparatus. It is a schematic block diagram of the packaging apparatus which concerns on embodiment. It is a schematic perspective view of a packaging apparatus. It is a front view of a packaging material supply part. It is the perspective view which looked at the back of the packaging material supply part. It is a rear view of a packaging material supply part. It is a front view of a packaging material supply part when a dancer roller exists in a fixed position. It is the perspective view which looked at the back surface of the packaging material supply part when a dancer roller exists in a fixed position. It is a front view of a packaging material supply part when a dancer roller exists in a movement position at the time of conveyance. It is the perspective view which looked at the back surface of the packaging material supply part when a dancer roller exists in a movement position at the time of conveyance. It is a front view of the packaging material supply part when a dancer roller exists in a retracted position. It is the perspective view which looked at the back surface of the packaging material supply part when a dancer roller exists in a retracted position. It is a block diagram which shows the electric constitution of the packaging apparatus which concerns on embodiment. It is a flowchart which shows the operation | movement by an unwinding winding part and a conveyance part. It is a flowchart which shows the initial stage operation | movement by a winding / unwinding part. It is a flowchart which shows the unwinding operation | movement by an unwinding winding part. It is a flowchart which shows the 1st example of the unwinding operation | movement by an unwinding winding part. It is a flowchart which shows the 2nd example of the unwinding operation | movement by an unwinding winding part.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following drawings, the same or corresponding parts are denoted by the same reference numerals, and the description thereof will not be repeated.

  FIG. 1 is a perspective view showing an appearance of the medicine supply device 101. As shown in FIG. 1, the medicine supply device 101 includes a housing 102 that constitutes an outline of the medicine supply device 101. The housing 102 has an upper housing 103 and a lower housing 104. The upper housing 103 stores a medicine storage / dispensing device for discharging each medicine from a plurality of medicine containers. In the lower housing 104, a packaging device for packaging the medicine in the packaging material is accommodated.

  Doors 105 a and 105 b are attached to the front surface of the upper housing 103. The door 105a has a handle 106a, and the door 105b has a handle 106b. A user who uses the medicine supply apparatus 101 can open and close the door 105a by holding the handle 106a, and can open and close the door 105b by holding the handle 106b. An operation unit 107 is provided on the front surface of the upper housing 103. The operation unit 107 may include a display having a touch panel function, or may include a physical button on the operation panel.

  Doors 108 and 109 are provided on the front surface of the lower housing 104. The doors 108 and 109 are configured to be openable and closable. A user who uses the medicine supply apparatus 101 can open the doors 108 and 109 and take out the package containing the medicine from the inside of the lower housing 104. Openings may be formed in the doors 108 and 109, and the package containing the medicine may be taken out from the openings.

  FIG. 2 is a schematic configuration diagram of the packaging device 1 according to the embodiment. The packaging device 1 is used for packaging an object to be packaged. The package object is a drug, specifically, a solid drug. Examples of solid drugs include tablets, pills and capsules. The solid drug may be a powder and a granule. The packaging object is not limited to a solid drug. The package object may be a semi-solid drug or a liquid drug.

  The packaging device 1 is a medicine packaging device for packaging medicine based on a prescription. The prescription is what the doctor gives to the patient. The prescription includes patient information and drug information. Patient information includes the name and age of the patient. The drug information includes the drug name, dosage, usage and dose. The packaging device 1 is used for packaging a medicine for each dose based on such a prescription.

  The packaging device 1 includes a packaging material transport unit 8. The packaging material transport unit 8 applies a driving force to the packaging material 2 to transport the packaging material 2. The packaging material 2 has a long sheet shape. The packaging material 2 is conveyed in the longitudinal direction of the packaging material 2. The packaging material 2 is unwound from the wound body 3. The wound body 3 is obtained by winding the packaging material 2 in a roll shape. The arrows in FIG. 2 indicate the conveyance direction DR of the packaging material 2. Hereinafter, the transport direction DR of the packaging material 2 is simply referred to as “transport direction DR”.

  The packaging device 1 further includes a printing unit 4, a supply unit 5, and a storage unit forming unit 6. The printing unit 4, the supply unit 5, and the storage unit forming unit 6 are arranged in this order from the upstream (side closer to the winding body 3) to the downstream (side away from the winding body 3) in the transport direction DR. The printing unit 4 prints predetermined information on the packaging material 2 conveyed by the packaging material conveyance unit 8. The predetermined information is information related to the medicine. The supply unit 5 supplies the medicine to the packaging material 2 conveyed by the packaging material conveyance unit 8. The medicine is supplied for each dose based on a prescription. The accommodating part forming part 6 forms an accommodating part using the packaging material 2 conveyed by the packaging material conveying part 8. A medicine is accommodated in the accommodating portion. After the medicine is supplied from the supply unit 5, the container forming part 6 heat-seals the packaging material 2 to form a package containing the medicine inside.

  The packaging device 1 further includes a perforation forming unit 7. The perforation forming part 7 is provided in the accommodating part forming part 6. The perforation forming unit 7 forms a perforation extending in the direction orthogonal to the conveyance direction DR on the packaging material 2 conveyed by the packaging material conveyance unit 8. The perforation is one in which a plurality of pores are continuously arranged in the short direction of the packaging material 2.

  In such a packaging apparatus 1, the packaging part 9 is configured by the accommodation part forming part 6, the perforation forming part 7, and the packaging material conveying part 8. In the packaging part 9, the medicine as a packaging object is sequentially packaged using the packaging material 2 unwound from the wound body 3.

  FIG. 3 is a schematic perspective view of the packaging device 1. The packaging device 1 further includes a packaging material supply unit 10, a direction changing bar 11, a cutting unit 12, a discharge unit 13, and a frame 15. Each device constituting the packaging device 1 including the supply unit 5, the storage unit forming unit 6, and the packaging material transporting unit 8 described above is attached to a frame 15. The packaging device 1 is configured to be capable of reciprocating with respect to the housing 102 (FIG. 1) in the thickness direction of the frame 15. The packaging device 1 is movable in the front-rear direction with respect to the lower housing 104 (FIG. 1), and is configured to be drawn forward from the storage position stored in the lower housing 104.

  The packaging material supply unit 10 includes a substantially box-shaped casing 20 and a mounted portion 21 to which the wound body 3 illustrated in FIG. 2 is mounted. The mounted portion 21 supports the wound body 3. The wound body 3 is attached to the mounted portion 21 so as not to rotate relative to the mounted portion 21. The casing 20 has a planar outer surface 20a. The outer surface 20 a constitutes a partial surface of the box-shaped casing 20. The mounted portion 21 protrudes from the outer surface 20a of the casing 20 and extends substantially perpendicular to the outer surface 20a.

  A guide hole 22 is formed in the outer surface 20 a of the casing 20. The guide hole 22 extends gently curved. A dancer roller 23 is provided so as to be movable along the direction in which the guide hole 22 extends. Fixed rollers 24 and 25 are attached to the outer surface 20a. The dancer roller 23 and the fixed rollers 24 and 25 protrude from the outer surface 20a of the casing 20 and extend substantially perpendicular to the outer surface 20a. The dancer roller 23 and the fixed rollers 24 and 25 extend in parallel to each other. Other configurations of the packaging material supply unit 10 will be described later.

  The packaging material 2 unwound from the wound body 3 is wound around the fixed roller 24, the dancer roller 23, and the fixed roller 25 in this order. The packaging material 2 is further wound around the direction change bar 11. The direction change bar 11 changes the transport direction DR of the packaging material 2 and moves the packaging material 2 in a direction toward the supply unit 5. The packaging material 2 is further wound around the packaging unit 9 (FIG. 2) via the supply unit 5.

  At the medicine supply position where the supply unit 5 supplies the medicine to the packaging material 2, the packaging material 2 is folded in two along the center line in the short direction of the packaging material 2. The supply unit 5 has a hopper 151. The hopper 151 guides the medicine dispensed from the medicine storage / dispensing device accommodated in the upper housing 103 (FIG. 1) to the packaging material 2. The tip of the hopper 151 is disposed so as to enter the inside of the folded packaging material 2. The medicine enters the inside of the folded packaging material 2 by being guided by the hopper 151.

  The cutting part 12 is provided downstream of the accommodating part forming part 6 and the packaging material conveying part 8 constituting the packaging part 9 in the conveying direction DR. The cutting part 12 cuts the packaging material 2 in which the medicine is accommodated. The discharge unit 13 is provided downstream of the cutting unit 12 in the transport direction DR. The discharge unit 13 generates a driving force for transporting the packaging material 2 cut by the cutting unit 12 and discharges the packaging material 2 to the outside. Hereinafter, a path through which the packaging material 2 unwound from the wound body 3 and transported to the discharge unit 13 is referred to as a “transport path”.

  FIG. 4 is a front view of the packaging material supply unit 10. FIG. 4 shows the packaging material supply unit 10 viewed from the direction of the arrow IV shown in FIG. The dancer roller 23 moves relative to the casing 20 along the guide hole 22 formed in the casing 20. The dancer roller 23 is configured to be displaceable in a direction that intersects the conveyance path of the packaging material 2.

  The packaging material supply unit 10 includes a position detection unit that detects the position of the dancer roller 23. This position detection unit has a fixed position sensor 28. The fixed position sensor 28 is a magnetic sensor. A magnet is attached to a main arm, which will be described later, to which the dancer roller 23 is attached. A position where the dancer roller 23 overlaps with the fixed position sensor 28 in the direction perpendicular to the paper surface of FIG. 4 is referred to as a fixed position. The fixed position is on the transport path. The fixed position sensor 28 detects the magnetic force and is turned on when the dancer roller 23 is in the fixed position. When the dancer roller 23 moves away from the home position, the home position sensor 28 switches from on to off. Thereby, the fixed position sensor 28 detects whether or not the dancer roller 23 is in a fixed position.

  The packaging material supply unit 10 has a lock release unit 26. The main arm is locked by a lock portion described later. By manually operating the lock release unit 26, the lock of the main arm by the lock unit is released.

  FIG. 5 is a perspective view of the packaging material supply unit 10 as viewed from the back. FIG. 6 is a rear view of the packaging material supply unit 10. FIG. 6 shows the packaging material supply unit 10 as viewed from the direction of the arrow VI shown in FIG. The position detection unit that detects the position of the dancer roller 23 includes a limit position sensor 27 and a retracted position sensor 29 in addition to the above-described fixed position sensor 28. The limit position sensor 27, the fixed position sensor 28, and the retracted position sensor 29 are supported by a sensor support portion 30. The sensor support portion 30 is fixed to the ceiling portion of the casing 20.

  In FIG. 4, the position where the dancer roller 23 is disposed is referred to as a limit position. The limit position is at one end of the guide hole 22. The position of the other end of the guide hole 22 is referred to as a retracted position. The limit position sensor 27 and the retracted position sensor 29 are magnetic sensors. The limit position and the retracted position are out of the conveyance path. The limit position is farther from the transport path than the fixed position.

  The limit position sensor 27 detects the magnetic force and is turned on when the dancer roller 23 is in the limit position. When the dancer roller 23 leaves the limit position, the limit position sensor 27 switches from on to off. Accordingly, the limit position sensor 27 detects whether or not the dancer roller 23 is at the limit position. When the dancer roller 23 is in the retracted position, the retracted position sensor 29 detects the magnetic force and is turned on. When the dancer roller 23 moves away from the retracted position, the retracted position sensor 29 switches from on to off. Accordingly, the retreat position sensor 29 detects whether or not the dancer roller 23 is in the retreat position.

  The packaging material supply unit 10 has an unwinding / winding motor 35. The unwinding / winding motor 35 of the present embodiment is a stepping motor. The unwinding / winding motor 35 is supported by the casing 20. The unwinding / winding motor 35 rotates the mounted portion 21 to generate a rotational driving force for unwinding the packaging material 2 from the wound body 3 or winding the packaging material 2 onto the wound body 3. . The driving force generated by the unwinding / winding motor 35 is transmitted to the mounted portion 21 via the intermediate gear 72, the intermediate pinion gear 73, and the roller gear 74. The intermediate gear 72 and the intermediate pinion gear 73 are fixed so as to be rotatable integrally with the intermediate gear shaft 75 as a center.

  The packaging material supply unit 10 includes a main arm 40, a sub arm 50, and a gear positioning plate 55. The main arm 40 has a first arm portion 41, a second arm portion 42, and a bent portion 43. Each of the first arm portion 41 and the second arm portion 42 shown in FIG. 6 has a substantially linear shape. The 1st arm part 41, the 2nd arm part 42, and the bending part 43 are mutually fixed so that rotation is possible. The main arm 40 has a substantially L-shape bent at the bent portion 43.

  The first arm portion 41 has a distal end and a proximal end. The dancer roller 23 described above is fixed to the tip of the first arm portion 41. The first arm portion 41 is connected to the bent portion 43 at the base end thereof. The second arm portion 42 has a distal end and a proximal end. A gear positioning plate 55 is fixed to the base end of the second arm portion 42. The second arm portion 42 is connected to the bent portion 43 at the tip thereof. A lock pin 47 is fixed to the bent portion 43. The main arm 40 is configured to be rotatable about an arm rotation shaft 44 as a rotation center. The main arm 40 is supported by the casing 20 via an arm rotation shaft 44.

  The sub arm 50 has a proximal end portion 51 and a distal end portion 52. The base end portion 51 is in surface contact with the surface of the main arm 40 from the bent portion 43 to the second arm portion 42 of the main arm 40, and is fixed to the main arm 40 using a plurality of fixing members such as bolts. Thereby, the sub arm 50 is configured to be rotatable integrally with the main arm 40. A cylindrical portion 53 is attached to the distal end portion 52 of the sub arm 50.

  One of the plurality of fixing members that fix the sub arm 50 to the main arm 40 constitutes a spring hook portion 45. The sensor support portion 30 is also provided with a spring hook portion 31. A spring hook portion 31 is configured by a bolt attached to the sensor support portion 30. One end of the return spring 46 is engaged with the spring hook 31, and the other end of the return spring 46 is engaged with the spring hook 45. The return spring 46 is, for example, a coil spring.

  The gear positioning plate 55 is fixed to the base end of the second arm portion 42 of the main arm 40 using a plurality of fixing members 56 such as bolts. A notch 59 is formed in the gear positioning plate 55. The gear positioning plate 55 has a first portion 57 and a second portion 58. The first portion 57 and the second portion 58 are separated by a notch 59. A part of the edge of the second portion 58 forms an arc edge 58a. The arc edge 58 a has an arc shape centered on the arm rotation shaft 44.

  A cylindrical portion 65 is provided in contact with the arc edge 58a. The cylindrical portion 65 is attached to the distal end portion of the second portion 63 of the gear arm. The tip of the third portion 64 of the gear arm is engaged with the intermediate gear shaft 75 through a bearing. A spring hook 66 is formed on the third portion 64. One end of a return spring (not shown) is engaged with the spring hook 38 and the other end is engaged with the spring hook 66.

  The outer peripheral surface of the cylindrical portion 65 is slidable with respect to the arc edge 58a. The cylindrical portion 65 is also movable in the notch 59. The intermediate gear 72 and the intermediate pinion gear 73 are positioned by the outer peripheral surface of the cylindrical portion 65 coming into contact with the arc edge 58a, and the intermediate gear 72 and the intermediate pinion gear 73 are moved to their positions by moving the cylindrical portion 65 into the notch 59. It is configured to change.

  The packaging material supply unit 10 further includes a lock unit 78. The lock part 78 has a lock member 79. The lock member 79 has an inclined portion 80 and an engaging portion 81 at an end portion on one side (left side in FIG. 6). The lock member 79 has a connecting piece at the other end (the right side in FIG. 6). The lock member 79 also has a protrusion 82.

  The lock member 79 is held by a holding member 84. The holding member 84 is fixed to the casing 20. The holding member 84 holds the lock member 79 so as to be slidable in the extending direction (left-right direction in FIG. 6). The holding member 84 has a protrusion. The protruding portion 82 of the locking member 79 and the protruding portion of the holding member 84 are arranged so that the tip portions thereof face each other. A spring 86 is provided across the protrusion 82 of the lock member 79 and the protrusion of the holding member 84. The protrusion 82 supports one end of the spring 86 (the left end of the spring 86 shown in FIG. 6). The protrusion of the holding member 84 supports the other end of the spring 86 (the right end of the spring 86 shown in FIG. 6).

  The lock portion 78 also has a linear solenoid actuator 87. The linear solenoid actuator 87 is fixed to the casing 20 by a holding member (not shown). The linear solenoid actuator 87 has a main body portion and a stem 88 protruding from the main body portion. The stem 88 is connected to the connecting piece of the lock member 79.

  The lock portion 78 is configured to lock the main arm 40 by engaging with a lock pin 47 attached to the main arm 40.

  The packaging device 1 has a spring hinge 90. The spring hinge 90 includes a first hinge plate 91, a second hinge plate 92, a hinge shaft 93, and a torsion spring 94. The first hinge plate 91 and the second hinge plate 92 are connected via a hinge shaft 93.

  The first hinge plate 91 is fixed to the lower housing 104 and cannot move. The second hinge plate 92 is movable relative to the first hinge plate 91 about the hinge shaft 93 as a rotation center. The second hinge plate 92 is inclined with respect to the vertical direction so that its upper end is relatively forward (rightward in the figure) and its lower end is relatively rearward (leftward in the figure). Has been placed.

  The torsion spring 94 has a coil part wound around the hinge shaft 93 and a pair of arm parts protruding from the coil part. One of the pair of arm portions is in contact with the first hinge plate 91. The other of the pair of arm portions is in contact with the second hinge plate 92.

  The torsion spring 94 causes an elastic repulsive force to act between the first hinge plate 91 and the second hinge plate 92, and the second hinge plate 92 moves away from the first hinge plate 91 about the hinge shaft 93. The second hinge plate 92 is biased. The first hinge plate 91 and the second hinge plate 92 extend substantially orthogonally in a state where an urging force of the torsion spring 94 and an external force other than gravity do not act on the spring hinge 90. When viewed in the axial direction of the hinge shaft 93, the first hinge plate 91 and the second hinge plate 92 are arranged in an L shape.

  The packaging material supply unit 10 can move relative to the spring hinge 90 in the front-rear direction of the housing 102 (left-right direction in FIG. 6). In the arrangement shown in FIG. 6, the cylindrical portion 53 of the sub arm 50 is separated from the second hinge plate 92, and the cylindrical portion 53 and the second hinge plate 92 are not in contact with each other. The cylindrical portion 53 is configured to slide relative to the second hinge plate 92 of the spring hinge 90, thereby rotating the sub arm 50 and the main arm 40 about the arm rotation shaft 44.

  FIG. 7 is a front view of the packaging material supply unit 10 when the dancer roller 23 is in a fixed position. The dancer roller 23 shown in FIG. 7 moves to the right in the drawing along the guide hole 22 as compared to FIG. The dancer roller 23 shown in FIG. 7 is located at a fixed position away from the limit position. Since the dancer roller 23 is away from the limit position shown in FIG. 4, the limit position sensor 27 is shown in FIG. On the other hand, in FIG. 7, since the dancer roller 23 is in a fixed position, the dancer roller 23 overlaps the fixed position sensor 28, and the fixed position sensor 28 is not shown.

  The packaging material 2 unwound from the wound body 3 (not shown in FIG. 7) is wound around the fixed roller 24, the dancer roller 23, and the fixed roller 25 in this order as described above. When the dancer roller 23 is in a fixed position, a predetermined tension is applied to the packaging material 2. By applying tension to the packaging material 2, the occurrence of loosening of the packaging material 2 is suppressed. Thereby, when the packaging material conveyance part 8 (FIG. 2, 3) conveys the packaging material 2, the shift | offset | difference of the packaging material 2, a leaning, etc. are suppressed.

  FIG. 8 is a perspective view of the back surface of the packaging material supply unit 10 when the dancer roller 23 is in a fixed position. The main arm 40 and the sub arm 50 shown in FIG. 8 rotate counterclockwise around the arm rotation shaft 44 as compared with FIG. The gear positioning plate 55 rotates together with the main arm 40, and the cylindrical portion 65 relatively moves along the arc edge 58a of the gear positioning plate 55, so that the cylindrical portion 65 shown in FIG. It is close to 59. The lock pin 47 shown in FIG. 8 moves in a direction approaching the lock portion 78 as compared to FIG. The return spring 46 shown in FIG. 8 has an increased length compared to FIG.

  FIG. 9 is a front view of the packaging material supply unit 10 when the dancer roller 23 is in the transport position. The dancer roller 23 shown in FIG. 9 moves to the right in the drawing along the guide hole 22 as compared to FIG. The dancer roller 23 shown in FIG. 9 is away from the home position, so both the limit position sensor 27 and the home position sensor 28 are shown in FIG. In FIG. 7, the position where the dancer roller 23 is disposed is referred to as a movement position during conveyance. The movement position during conveyance is on the conveyance path.

  In FIG. 9, the packaging material 2 is transported by the packaging material transport unit 8 for the length of one package of the medicine accommodated therein, and moved from a fixed position as the packaging material 2 is transported. A dancer roller 23 is shown. While the packaging material 2 is being conveyed by the packaging material conveyance unit 8, the unwinding / winding motor 35 is stopped. Therefore, the packaging material 2 is not unwound from the wound body 3.

  On the other hand, the length of the packaging material 2 in the conveyance direction DR from the wound body 3 to the packaging material conveyance unit 8 is reduced when the packaging material conveyance unit 8 conveys the packaging material 2 as one package. Shorten the package. The change in the length of the packaging material 2 is adjusted by moving the dancer roller 23 to shorten the distance between the dancer roller 23 and the fixed roller 24 and the distance between the dancer roller 23 and the fixed roller 25. Yes.

  That is, the wrapping material 2 wound between the dancer roller 23 and the fixed rollers 24 and 25 at the fixed position shown in FIG. 7, and the dancer roller 23 and the fixed rollers 24 and 25 at the position shown in FIG. 9 is compared with the length of the packaging material 2 wound around, the length of the packaging material 2 is shorter in FIG. By making the change in the length of the packaging material 2 wound between the dancer roller 23 and the fixed rollers 24, 25 correspond to the length of one package, a predetermined tension is applied to the packaging material 2. The packaging material 2 can be conveyed while maintaining the state to which is given constant.

  The length of one package in the transport direction DR is not always constant, and may be changed according to the amount of medicine accommodated in the package. Depending on the dimensions of the package, the transport amount of the packaging material 2 by the packaging material transport unit 8 can also be changed, and the movement position during transport also varies. When the length of one package in the transport direction DR is large, the movement position during transport is set to a position relatively away from the fixed position. When the length of one package in the transport direction DR is small, the movement position during transport is set to a position that is relatively close to a fixed position.

  The packaging material 2 is conveyed intermittently. After carrying the packaging material 2, the unwinding / winding motor 35 is driven while the conveyance of the packaging material 2 is stopped. When the driving force of the unwinding / winding motor 35 is transmitted to the mounted portion 21 and the wound body 3 rotates, the packaging material 2 is unwound from the wound body 3. At this time, since the conveyance of the packaging material 2 by the packaging material conveyance unit 8 is stopped, the packaging material 2 unwound from the wound body 3 is wound between the dancer roller 23 and the fixed rollers 24 and 25. Used to restore the length of the packaging material 2. That is, when the wrapping material 2 is unwound from the wound body 3, the dancer roller 23 moves from the moving position during conveyance shown in FIG. 9 toward the fixed position shown in FIG. When the dancer roller 23 moves to a fixed position and the fixed position sensor 28 detects the dancer roller 23, the unwinding / winding motor 35 is stopped.

  In this way, a predetermined tension is applied to the packaging material 2 by alternately repeating the transportation of the packaging material 2 by the packaging material transport unit 8 and the unwinding of the packaging material 2 from the wound body 3. The packaging material 2 can be appropriately conveyed while maintaining the state.

  FIG. 10 is a perspective view of the back surface of the packaging material supply unit 10 when the dancer roller 23 is in the moving position during conveyance. The main arm 40 and the sub arm 50 shown in FIG. 10 rotate counterclockwise around the arm rotation shaft 44 as compared with FIG. As the gear positioning plate 55 rotates together with the main arm 40 and the cylindrical portion 65 relatively moves along the arc edge 58a of the gear positioning plate 55, the cylindrical portion 65 shown in FIG. It is close to 59. The lock pin 47 shown in FIG. 10 moves in a direction approaching the lock portion 78 as compared to FIG. The return spring 46 shown in FIG. 10 has an increased length compared to FIG.

  As described above, when the packaging material 2 is being transported by the packaging material transport unit 8, a state where tension is applied to the packaging material 2 is maintained. At this time, the dancer roller 23 is positioned between the fixed position and the transport position during transport. Move back and forth. When all of the packaging material 2 is unwound from the wound body 3, the upstream end of the packaging material 2 in the transport direction DR is not supported by the wound body 3, so that no tension is applied to the packaging material 2. Since the dancer roller 23 is not supported by the packaging material 2 in a state where tension is applied, the main arm 40 is rotated by the elastic force of the return spring 46, and accordingly, the dancer roller 23 moves to the limit position.

  FIG. 11 is a front view of the packaging material supply unit 10 when the dancer roller 23 is in the retracted position. The dancer roller 23 shown in FIG. 11 moves to the right in the drawing along the guide hole 22 as compared to FIG. The dancer roller 23 shown in FIG. 11 is located at the retracted position of the other end of the guide hole 22.

  7 and 9, the dancer roller 23 is located on the left side in the figure with respect to the fixed rollers 24 and 25. Therefore, the packaging material 2 wound around the fixed roller 24, the dancer roller 23, and the fixed roller 25 in this order is pressed by the dancer roller 23, thereby applying tension to the packaging material 2. On the other hand, in FIG. 11, the dancer roller 23 is located on the right side in the figure with respect to the fixed rollers 24 and 25. The packaging material 2 unwound from the wound body 3 passes through the gap between the dancer roller 23 and the fixed roller 24 in the left-right direction in FIG. 11, and also passes through the gap between the dancer roller 23 and the fixed roller 25. It is possible. At this time, no tension is applied to the packaging material 2.

  The tension is applied to the packaging material 2 by passing the packaging material 2 through the gap between the dancer roller 23 and the fixed rollers 24 and 25 in the left-right direction in FIG. 11 and moving the dancer roller 23 to a fixed position in this state. Is done.

  The dancer roller 23 and the fixed rollers 24 and 25 constitute a tension applying unit that applies tension to the packaging material 2 unwound from the wound body 3. The tension applying unit applies tension to the packaging material 2 when the dancer roller 23 presses the packaging material 2. The dancer roller 23 constitutes a displacement member that can be displaced in a direction that intersects the conveyance path of the packaging material 2. By moving the dancer roller 23, the tension applying unit can be switched between an applied state in which tension is applied to the packaging material 2 and a non-applied state in which tension is not applied to the packaging material 2.

  FIG. 12 is a perspective view of the back surface of the packaging material supply unit 10 when the dancer roller 23 is in the retracted position. The main arm 40 and the sub arm 50 shown in FIG. 12 rotate counterclockwise around the arm rotation shaft 44 as compared with FIG. The cylindrical portion 65 shown in FIG. 12 is located in the notch 59 away from the arc edge 58 a of the gear positioning plate 55. The lock pin 47 shown in FIG. 12 is engaged with a lock portion 78 (not shown in FIG. 12), whereby the main arm 40 is locked. The return spring 46 shown in FIG. 12 has an increased length as compared with FIG. 10, and takes the maximum length.

  Next, the control for calculating the remaining amount of the packaging material 2 in the wound body 3 will be described. FIG. 13 is a block diagram illustrating an electrical configuration of the packaging device 1 according to the embodiment. As shown in FIG. 13, the packaging device 1 includes an operation unit 107 and an overall control unit 200.

  The operation unit 107 is operated by an operator who operates the packaging device 1. By operating the operation unit 107 by the operator, information necessary for the packaging operation of the packaging device 1 is input to the overall control unit 200. Information necessary for the packaging operation of the packaging device 1 includes prescription data based on a prescription and various setting information. The setting information includes the length of one package of the package in which the medicine is accommodated. Information necessary for the packaging operation of the packaging device 1 may be input to the overall control unit 200 from an external computer.

  The overall control unit 200 controls the overall operation of the packaging device 1 based on information necessary for the packaging operation of the packaging device 1. The overall control unit 200 controls the supply unit 5 and the packaging unit 9.

  The overall control unit 200 transmits a control signal to the supply unit 5 and instructs the type and quantity of the medicine to be supplied by the supply unit 5. The overall control unit 200 transmits a control signal to the packaging unit 9 so that the length of the package in the transport direction DR becomes a predetermined value. The length of the package may be, for example, a value input via the operation unit 107, or may be a value set by the overall control unit 200 based on the type and quantity of the medicine.

  The packaging unit 9 has a packaging control unit 201. The packaging control unit 201 receives detection signals from the fixed position sensor 28, the limit position sensor 27, and the retracted position sensor 29, and determines the current position of the dancer roller 23. The packaging control unit 201 controls the unwinding / winding motor 35, the pressure motor 6m, the heater 6h, and the conveyance motor 8m based on a control signal from the overall control unit 200. The unwrapping and winding motor 35, the pressure motor 6m, the heater 6h, and the transport motor 8m are appropriately driven and stopped, whereby the packaging material 2 is packaged.

  The pressure motor 6m and the heater 6h are included in the housing portion forming portion 6 (FIG. 2). The heater 6h is built in one of a pair of pressurizing members arranged to face each other with the packaging material 2 therebetween. The pressure motor 6m drives a pair of pressure members, presses the packaging material 2 from both sides with the pressure members, and separates the pressure member from the packaging material 2. When the packaging material 2 is pressurized from both sides, the heater 6h is driven to heat the packaging material 2, whereby a part of the packaging material 2 is heat-sealed to form a package containing the medicine inside.

  The conveyance motor 8 m is included in the packaging material conveyance unit 8. The conveyance motor 8m rotationally drives a pair of conveyance rollers arranged to face each other with the packaging material 2 interposed therebetween. The packaging material 2 is conveyed by the conveyance motor 8m rotationally driving the pair of conveyance rollers. The packaging material transport unit 8 transports the packaging material 2 intermittently. While the conveyance of the packaging material 2 is stopped, heat sealing of the packaging material 2 by the housing portion forming unit 6, printing of predetermined information on the packaging material 2 by the printing unit 4 (FIG. 2), perforation forming unit Predetermined operations such as formation of perforations in the packaging material 2 by 7 (FIG. 2) and cutting of the packaging material 2 by the cutting portion 12 (FIG. 3) are performed.

  FIG. 14 is a flowchart showing the operations of the unwinding / winding unit and the conveying unit. In the packaging device 1 of the present embodiment, the unwinding / winding unit is configured to execute unwinding of the packaging material 2 from the wound body 3 or winding of the packaging material 2 onto the wound body 3. It is. The unwinding / winding unit includes an unwinding / winding motor 35, a mounted portion 21, a power transmission unit that transmits the driving force generated by the unwinding / winding motor 35 to the mounted portion 21, the dancer roller 23, and the dancer roller 23. A position detection unit for detecting the position and fixed rollers 24 and 25 are included. A conveyance part is the structure for conveying the packaging material 2 along the conveyance direction DR. The transport unit is configured by a packaging material transport unit 8.

  As shown in FIG. 14, when packaging by the packaging apparatus 1 is started, first, in step S101, an initial operation by the unwinding / winding unit is started.

  FIG. 15 is a flowchart showing an initial operation by the unwinding / winding unit. Details of the initial operation performed by the unwinding / winding unit performed in step S101 will be described with reference to FIGS. 15 and 16.

  In step S201, it is determined whether or not the dancer roller 23 is in a position other than the home position. Whether or not the dancer roller 23 is in a fixed position is determined based on a detection signal indicating whether or not the fixed position sensor 28 is in an ON state. When the fixed position sensor 28 is in the off state, it is determined that the dancer roller 23 is in a position other than the fixed position. If it is determined that dancer roller 23 is in a position other than the fixed position, that is, dancer roller 23 is not in the fixed position (YES in step S201), the process proceeds to step S202, and the unwinding / winding operation by the unwinding / winding unit is performed. Done.

  FIG. 16 is a flowchart showing an unwinding / winding operation by the unwinding / winding unit. FIG. 16 is a flowchart showing a subroutine of the unwinding / winding operation performed in step S202 included in the initial operation by the unwinding / winding unit.

  Referring to FIG. 16, first, in step S301, it is determined whether or not the dancer roller 23 is in the limit position. Whether or not the dancer roller 23 is in the limit position is determined based on a detection signal indicating whether or not the limit position sensor 27 is in the ON state. When the limit position sensor 27 is off, it is determined that the dancer roller 23 is in a position other than the limit position. If it is determined that dancer roller 23 is not in the limit position (NO in step S301), the process proceeds to step S302, and unwinding of packaging material 2 from wound body 3 is started. The packaging control unit 201 transmits a control signal to the unwinding and winding motor 35 so as to rotationally drive the mounted portion 21 in the direction in which the packaging material 2 is unwound from the wound body 3.

  Subsequently, in step S303, it is determined whether or not the dancer roller 23 is at the limit position. If it is determined that the dancer roller 23 is not in the limit position (NO in step S303), the determination in step S303 is repeated until it is detected that the dancer roller 23 is in the limit position, and the intermediate packaging material 2 is unwound. Will continue. If it is determined that dancer roller 23 is in the limit position (YES in step S303), the process proceeds to step S304, and unwinding of packaging material 2 from wound body 3 is terminated. The packaging control unit 201 transmits a control signal for stopping the unwinding and winding motor 35.

  If it is determined in step S301 that the dancer roller 23 is in the limit position (YES in step S301), the dancer roller 23 is in the limit position. When the unwinding of the packaging material 2 is completed in step S304, the dancer roller 23 is in the limit position. When it is detected that the dancer roller 23 is in the limit position, the process proceeds to step S305, and winding of the packaging material 2 around the wound body 3 is started. The packaging control unit 201 transmits a control signal to the unwinding / winding motor 35 so as to rotationally drive the mounted portion 21 in the direction in which the packaging material 2 is wound around the wound body 3.

  Subsequently, in step S306, it is determined whether or not the dancer roller 23 is in a fixed position. If it is determined that the dancer roller 23 is not in the fixed position (NO in step S306), the determination in step S306 is repeated until it is detected that the dancer roller 23 is in the fixed position. Will continue. If it is determined that dancer roller 23 is in the fixed position (YES in step S306), the process proceeds to step S307, and the winding of packaging material 2 around wound body 3 is terminated. The packaging control unit 201 transmits a control signal for stopping the unwinding and winding motor 35. In this way, the unwinding / winding operation by the unwinding / winding unit is completed.

  The dancer roller 23 is movable along the guide hole 22 from the limit position to the retracted position. If it is not detected in step S201 that the dancer roller 23 is in the fixed position, and if it is not detected in step S301 that the dancer roller 23 is in the limit position, the position of the dancer roller 23 is unknown. First, in step S302 to step S304, the packaging material 2 is unwound and the dancer roller 23 is moved to the limit position. After the dancer roller 23 has moved to the limit position, the packaging material 2 is wound up in steps S305 to S307, and the dancer roller 23 is moved to a fixed position.

  That is, in the unwinding / winding operation, the dancer roller 23 moves to a fixed position after it is detected that it is in the limit position. In the unwinding / winding operation, the dancer roller 23 moves a certain distance from the limit position to the fixed position. When the unwinding / winding operation is completed, the dancer roller 23 is in a fixed position.

  When the remaining amount of the packaging material 2 in the wound body 3 is large and the wound diameter of the packaging material 2 is large, the inertia of the wound body 3 is large. For this reason, if the rotational speed of the wound body 3 is too large, there is a possibility of stepping out due to the characteristics of the stepping motor. Further, since the inertia of the wound body 3 is large, the packaging material 2 is loosened, and this looseness becomes an error, and the accuracy of the remaining amount judgment of the packaging material 2 is lowered. Therefore, when the remaining amount of the packaging material 2 is large, the rotation speed is reduced.

  When the remaining amount of the wrapping material 2 in the wound body 3 is small and the winding diameter of the wrapping material 2 is small, the inertia of the wound body 3 is small, so the possibility of step-out is reduced. Further, when the winding diameter is small as compared with the case where the winding diameter is large, it is necessary to rotate the wound body 3 more in order to unwind the packaging material 2 having the same length. Therefore, the rotation speed is increased when the remaining amount of the packaging material 2 is small. Thus, the packaging control unit 201 sets the rotation speed of the unwinding / winding motor 35 in accordance with the remaining amount of the packaging material 2 in the wound body 3.

  When performing the unwinding / winding operation, the unwinding / winding operation in step S202 in which the remaining amount of the packaging material 2 is not known is executed at the minimum speed. Since the remaining amount of the packaging material 2 is not known, the unwinding / winding operation at the minimum speed is executed from the viewpoint of reliably preventing the step-out.

  Returning to FIG. 15, when the unwinding operation by the unwinding and winding unit is completed, the remaining amount of the packaging material 2 in the wound body 3 is calculated in step S203. The remaining amount of the packaging material 2 is indicated in a plurality of stages. In the present embodiment, the remaining amount of the packaging material 2 is shown in five stages. Specifically, the remaining amount of the packaging material 2 is set to “LL”, “L”, “M”, “S”, “SS” in order from the largest.

  The unwinding / winding motor 35 is a stepping motor, and the drive amount of the unwinding / winding motor 35 corresponds to the number of drive pulses (step number) of the stepping motor. The number of steps of the stepping motor is counted while the dancer roller 23 moves a certain distance from the limit position to the fixed position. The number of steps of the stepping motor from when it is detected that the dancer roller 23 is not at the limit position to when it is detected that the dancer roller 23 is at the fixed position is counted. Thereby, the remaining amount of the packaging material 2 in the wound body 3 is calculated.

  If the winding diameter of the packaging material 2 is small, the number of rotations of the packaging material 2 required to move the dancer roller 23 by a certain distance increases, and at this time, the number of steps of the stepping motor increases. When the winding diameter of the wrapping material 2 is large, the number of rotations of the wrapping material 2 required until the dancer roller 23 is moved by a certain distance becomes small, and at this time, the number of steps of the stepping motor becomes small. Therefore, by storing the relationship between the number of steps of the stepping motor and the remaining amount of the packaging material 2 in advance in the packaging control unit 201, the packaging in the wound body 3 is based on the number of steps of the unwinding and winding motor 35. The remaining amount of the material 2 can be calculated.

  Next, in step S204, it is determined whether there is a result of determining the remaining amount of the packaging material 2 in the wound body 3. The remaining amount determination result refers to a value stored in the packaging control unit 201 as the current remaining amount of the packaging material 2 in the wound body 3.

  If it is determined that there is a remaining amount determination result, that is, the remaining amount determination result is stored in packaging control unit 201 (YES in step S204), the remaining amount of packaging material 2 calculated in step S203 in step S205 And the remaining amount determination result are compared to determine whether the remaining amount calculation result of the packaging material 2 is smaller than the remaining amount determination result. That is, it is determined whether or not the remaining amount of the packaging material 2 calculated this time is smaller than the remaining amount of the packaging material 2 calculated previously.

  If it is determined that the calculation result of the remaining amount of packaging material 2 is smaller than the remaining amount determination result (YES in step S205), the process proceeds to step S206, and the calculation result of the remaining amount of packaging material 2 calculated in step S203 is obtained. Then, it is stored in the packaging control unit 201 as the remaining amount determination result. If it is determined in step S204 that there is no remaining amount determination result, that is, the remaining amount determination result is not stored in the packaging control unit 201 (NO in step S204), the process proceeds to step S206 and calculated in step S203. The calculation result of the remaining amount of the packaging material 2 is stored in the packaging control unit 201 as the remaining amount determination result. Then, the initial operation ends.

  If it is determined in step S205 that the calculation result of the remaining amount of the packaging material 2 is equal to or greater than the remaining amount determination result (NO in step S205), the calculation result of the remaining amount of the packaging material 2 is used as the remaining amount determination result. The initial operation is terminated without reflecting.

  If it is determined in step S201 that the dancer roller 23 is in a fixed position (YES in step S201), the unwinding / winding operation is not executed, and the initial operation is terminated as it is.

  Returning to FIG. 14, when the initial operation in step S <b> 101 is completed, in step S <b> 102, it is determined whether or not the number of packages packaged by the packaging apparatus 1 up to the present time after starting packaging has reached the specified number of packages. If it is determined that the specified number of packages has not been reached (NO in step S102), the process proceeds to step S103, where the above-described heat fusion, printing, perforation should be performed while the packaging material 2 is stopped by the transport unit. It is determined whether or not all predetermined operations such as formation and cutting have been completed. The determination in step S103 is repeated until all the predetermined operations are completed.

  When all the predetermined operations are completed (YES in step S103), in step S104, the transport operation of the packaging material 2 by the transport unit is started. The packaging control unit 201 transmits a control signal for driving the transport motor 8m to the transport motor 8m. During the transport operation of the packaging material 2, the packaging control unit 201 transmits a control signal for maintaining the stop of the unwinding / winding motor 35 to the unwinding / winding motor 35. Therefore, unwinding of the packaging material 2 from the wound body 3 is not performed.

  Subsequently, in step S105, it is determined whether or not the transport operation is finished. The packaging control unit 201 calculates the transport distance of the packaging material 2 based on the driving amount of the transport motor 8m. When the packaging material 2 is conveyed by the length of one package, the conveying operation of the packaging material 2 is finished. The packaging control unit 201 transmits a control signal for stopping the conveyance motor 8m to the conveyance motor 8m. When the transporting operation of the packaging material 2 is completed, the dancer roller 23 has moved from the fixed position to the transporting movement position.

  Next, in step S106, the unwinding operation by the unwinding / winding unit is started. FIG. 17 is a flowchart illustrating a first example of the unwinding operation by the unwinding and winding unit. FIG. 17 is a flowchart showing an example of a subroutine for the unwinding operation performed in step S106.

  Referring to FIG. 17, first, in step S401, unwinding of packaging material 2 from wound body 3 is started. The packaging control unit 201 transmits a control signal to the unwinding and winding motor 35 so as to rotationally drive the mounted portion 21 in the direction in which the packaging material 2 is unwound from the wound body 3. At this time, the packaging control unit 201 sets the rotational speed of the unwinding / winding motor 35 based on the remaining amount determination result of the packaging material 2.

  Subsequently, in step S402, it is determined whether or not the dancer roller 23 is in a fixed position. If it is determined that the dancer roller 23 is not in the fixed position (NO in step S402), the determination in step S402 is repeated until the dancer roller 23 is detected to be in the fixed position, and the intermediate packaging material 2 is unwound. Will continue. If it is determined that dancer roller 23 is in a fixed position (YES in step S402), the process proceeds to step S403, and unwinding of packaging material 2 from wound body 3 is terminated. The packaging control unit 201 transmits a control signal for stopping the unwinding and winding motor 35.

  In the unwinding operation, the dancer roller 23 moves from the moving position during conveyance to a fixed position. The movement position at the time of conveyance changes according to the length of one package in the conveyance direction DR. The relationship between the length of one package and the movement position during conveyance is stored in advance in the packaging control unit 201. The packaging control unit 201 derives the moving distance of the dancer roller 23 in the unwinding operation according to the length of one package.

  When the unwinding operation is completed, the remaining amount of the packaging material 2 in the wound body 3 is calculated in step S404. The number of steps of the stepping motor from the start of driving of the wound body 3 by the unwinding / winding motor 35 in step S401 until it is detected in step S402 that the dancer roller 23 is in a fixed position is counted. To do. The remaining amount of the packaging material 2 in the wound body 3 can be calculated based on the number of steps of the stepping motor while the dancer roller 23 moves from the moving position during conveyance to the fixed position.

  Next, in step S405, the calculation result of the remaining amount of the packaging material 2 calculated in step S404 is compared with the remaining amount determination result, and the calculation result of the remaining amount of the packaging material 2 is greater than the remaining amount determination result. Determine if it is small. That is, it is determined whether or not the remaining amount of the packaging material 2 calculated this time is smaller than the remaining amount of the packaging material 2 calculated previously.

  If it is determined that the calculation result of the remaining amount of packaging material 2 is smaller than the remaining amount determination result (YES in step S405), then in step S406, the calculation result of the remaining amount of packaging material 2 is greater than the remaining amount determination result. 1 is added to the number of times that it is determined that is smaller. More specifically, if the number of times that the calculation result of the remaining amount of the packaging material 2 is smaller than the remaining amount determination result at the time of step S405 is N (N is an integer greater than or equal to zero), in step S406 The number of times is (N + 1) times. For example, if the number of times that the calculation result of the remaining amount of the packaging material 2 is smaller than the remaining amount determination result is two at the time of step S405, the number of times is set to three in step S406.

  Next, in step S407, it is determined whether the number of times after the addition in step S406 is equal to or greater than a threshold value. If it is determined that the number of times is equal to or greater than the threshold (YES in step S407), the process proceeds to step S408, and the remaining amount determination result is updated. For example, when the threshold value used for the determination in step S407 is 5, when it can be determined that the calculation result of the remaining amount of the packaging material 2 is smaller than the remaining amount determination result for five consecutive times, the packaging control unit 201 The value of the remaining amount determination result stored is updated.

  The remaining amount determination result may be updated by using the latest calculation result of the remaining amount of the packaging material 2 calculated in step S404 as the remaining amount determination result. For example, when the threshold value used for the determination in step S407 is 5, when it can be determined that the calculation result of the remaining amount of the packaging material 2 is smaller than the remaining amount determination result for five consecutive times, the fifth calculation result May be stored in the packaging control unit 201 as a new remaining amount determination result.

  Alternatively, the remaining amount determination result may be updated by setting the maximum calculation result among the plurality of calculation results of the remaining amount of the packaging material 2 calculated in step S404 as the remaining amount determination result. For example, when the threshold value used for the determination in step S407 is 5, when it is determined that the calculation result of the remaining amount of the packaging material 2 is smaller than the remaining amount determination result five times in succession, The largest calculation result may be stored in the packaging control unit 201 as a new remaining amount determination result.

  Alternatively, the remaining amount determination result may be updated by setting the most frequent calculation result as the remaining amount determination result among the plurality of calculation results of the remaining amount of the packaging material 2 calculated in step S404. For example, when the threshold value used for the determination in step S407 is 5, and it can be determined that the calculation result of the remaining amount of the packaging material 2 is smaller than the remaining amount determination result for five consecutive times, When four are the same value but the other is different, the same value as the four calculation results excluding one calculation result with different values is stored in the packaging control unit 201 as a new remaining amount determination result. Also good.

  Alternatively, the remaining amount determination result may be updated by reducing the remaining amount determination result by one step. For example, when the threshold value used in the determination in step S407 is 5, when it is determined that the calculation result of the remaining amount of the packaging material 2 is smaller than the remaining amount determination result for five consecutive times, Regardless, the remaining amount determination result may be reduced by one step and stored in the packaging control unit 201 as a new remaining amount determination result.

  In this way, the value of the remaining amount determination result stored in the packaging control unit 201 is updated. In step S408, the number of times when it is determined that the calculation result of the remaining amount of the packaging material 2 is smaller than the remaining amount determination result is initialized. That is, the number of times is set to zero. Then, the unwinding operation is finished.

  If it is determined in step S407 that the number of times is less than the threshold (NO in step S407), the unwinding operation is terminated without updating the remaining amount determination result.

  If it is determined in step S405 that the calculation result of the remaining amount of the packaging material 2 is greater than or equal to the determination result of the remaining amount (NO in step S405), the process proceeds to step S409, and the calculation result of the remaining amount of the packaging material 2 is obtained. The number of times determined to be smaller than the remaining amount determination result is initialized. That is, the number of times is set to zero. Then, the unwinding operation is terminated without updating the remaining amount determination result.

  Alternatively, when it is determined in step S405 that the calculation result of the remaining amount of the packaging material 2 is equal to or greater than the remaining amount determination result, the unwinding operation may be terminated without performing anything. That is, if NO in step S405, step S409 shown in FIG. 17 may be skipped and the unwinding operation may be terminated as it is. In this case, even if it is determined that the calculation result of the remaining amount of the packaging material 2 is greater than or equal to the remaining amount determination result, the initial number of times that the calculation result of the remaining amount of the packaging material 2 is determined to be smaller than the remaining amount determination result It is not converted. As a result, the remaining amount determination result is updated when the number of times it is determined that the calculation result of the remaining amount of the packaging material 2 is smaller than the remaining amount determination result is equal to or greater than the threshold value.

  For example, when the threshold value used for the determination in step S407 is 5, the calculation result of the remaining amount of the packaging material 2 is determined to be smaller than the remaining amount determination result four times in succession, and the packaging material 2 is determined by the fifth determination. If the calculation result of the remaining amount is determined to be larger than the remaining amount determination result, and the calculation result of the remaining amount of the packaging material 2 is determined to be smaller than the remaining amount determination result in the sixth determination, the Since the number of times that the calculation result of the remaining amount is determined to be smaller than the remaining amount determination result is accumulated to be equal to or greater than the threshold, the value of the remaining amount determination result stored in the packaging control unit 201 is updated.

  FIG. 18 is a flowchart showing a second example of the unwinding operation by the unwinding / winding unit. FIG. 18 is a flowchart showing another example of the subroutine for the unwinding operation performed in step S106.

  In steps S501 to S505 shown in FIG. 18, the same processing is performed as in steps S401 to S405 described with reference to FIG.

  If it is determined in step S505 that the calculation result of the remaining amount of the packaging material 2 is smaller than the remaining amount determination result (YES in step S505), then in step S506, the packaging material 2 calculated in step S504. It is determined whether the calculation result of the remaining amount is equal to the calculation result of the remaining amount of the packaging material 2 calculated in the previous unwinding operation.

  If it is determined that the calculation result of the remaining amount of the packaging material 2 matches the previous calculation result (YES in step S506), then in step S507, the calculation result of the remaining amount of the packaging material 2 is the previous calculation. 1 is added to the number of times it is determined that the result matches. More specifically, if the number of times that the calculation result of the remaining amount of the packaging material 2 coincides with the previous calculation result at the time of step S506 is N (N is an integer equal to or greater than zero), the step In S507, the number of times is (N + 1) times. For example, if the number of times that the calculation result of the remaining amount of the packaging material 2 coincides with the previous calculation result is two at the time of step S506, the number of times is set to three in step S507.

  Next, in step S508, it is determined whether the number of times after the addition in step S507 is equal to or greater than a threshold value. When it is determined that the number of times is equal to or greater than the threshold (YES in step S508), the process proceeds to step S509, and the packaging control unit uses the calculation result of the remaining amount of the packaging material 2 calculated in step S504 as a new remaining amount determination result. Store in 201. For example, when the threshold value used for the determination in step S508 is 5, when it can be determined that the calculation result of the remaining amount of the packaging material 2 matches the previous calculation result five times in succession, the fifth time The calculation result is stored in the packaging control unit 201 as a new remaining amount determination result.

  In step S509, the number of times it is determined that the calculation result of the remaining amount of the packaging material 2 matches the previous calculation result is initialized. That is, the number of times is set to zero. Then, the unwinding operation is finished.

  If it is determined in step S508 that the number of times is less than the threshold (NO in step S508), the unwinding operation is terminated without reflecting the calculation result of the remaining amount of the packaging material 2 in the remaining amount determination result. .

  When it is determined in step S506 that the calculation result of the remaining amount of the packaging material 2 does not match the previous calculation result (NO in step S506), and in the determination of step S505, the remaining packaging material 2 remains. When it is determined that the amount calculation result is equal to or greater than the remaining amount determination result (NO in step S505), the process proceeds to step S510, and it is determined that the calculation result of the remaining amount of the packaging material 2 matches the previous calculation result. Initialize the number of times That is, the number of times is set to zero. Then, the unwinding operation is terminated without reflecting the calculation result of the remaining amount of the packaging material 2 in the remaining amount determination result.

  Returning to FIG. 14, when the unwinding operation in step S106 is completed, the process returns to the determination in step S102. Until the number of packages packaged by the packaging device 1 reaches the specified number of packages, the transport of the packaging material 2 and the unwinding of the packaging material 2 from the wound body 3 are repeated according to steps S103 to S106. If it is determined that the specified number of packages has been reached (YES in step S102), a series of packaging operations by the unwinding / winding unit and the conveying unit is terminated.

  As described above, the packaging device 1 of the present embodiment calculates the movement distance of the dancer roller 23 based on the detection result by the position detection unit, and the number of steps of the unwinding / winding motor 35 that is a stepping motor. Is counted, and the driving amount of the unwinding / winding motor 35 during the movement of the dancer roller 23 is measured. The remaining amount of the packaging material 2 in the wound body 3 is calculated from the driving amount of the unwinding / winding motor 35 with respect to the movement amount of the dancer roller 23.

  A position detection unit provided to detect that the dancer roller 23 is at a fixed position or a limit position and a driving force for rotating the wound body 3 to unwind the packaging material 2 from the wound body 3 are generated. The remaining amount of the packaging material 2 is calculated using the unwinding / winding motor 35. In other words, the remaining amount of the packaging material 2 in the wound body 3 can be calculated using only other parts that are used, in other words, without adding a dedicated component for calculating the remaining amount of the packaging material 2. Therefore, the configuration of the packaging device 1 can be simplified.

  The packaging material 2 may stick to the wound body 3 due to static electricity or the like, and the packaging material 2 may not be unwound even if the wound body 3 is rotated. When the amount of the wrapping material 2 unwound from the wound body 3 is smaller than the original amount, the driving amount of the unwinding / winding motor 35 for moving the dancer roller 23 by a predetermined distance increases, and the remaining amount of the wrapping material 2 remains. The amount calculation result is smaller than the actual remaining amount. If it is determined that the remaining amount of the packaging material 2 has decreased based on the calculation result that is less than the actual remaining amount of the packaging material 2 and the rotational speed of the unwinding / winding motor 35 is increased, the wound body is excessively fast. There is a possibility that the stepping motor will step out, the wrapping material 2 will loosen, and so on.

  Therefore, in the packaging device 1 of the present embodiment, the remaining amount determination result is updated based on a plurality of calculation results. Even if it is detected once that the rotation speed of the winding / winding motor 35 when calculating the remaining amount of the packaging material 2 is large and the remaining amount of the packaging material 2 is reduced, the remaining amount of the packaging material 2 at that time Rather than using the calculation result as the remaining amount determination result, the remaining amount determination result is updated when it is determined a plurality of times that the remaining amount of the packaging material 2 has decreased. In this way, temporary fluctuations in the calculation result of the remaining amount of the packaging material 2 are not reflected in the remaining amount determination result, and the detection accuracy of the remaining amount of the packaging material 2 can be improved. Therefore, the occurrence of an event of rotating the wound body 3 at an excessive speed relative to the actual remaining amount of the packaging material 2 can be suppressed.

  In the example illustrated in FIG. 17, each time the remaining amount of the packaging material 2 is calculated, the latest calculation result is compared with the remaining amount determination result stored in the packaging control unit 201. When the number of times that the latest calculation result is determined to be smaller than the remaining amount determination result is equal to or greater than the threshold, the remaining amount determination result is updated. In another example shown in FIG. 18, every time the remaining amount of the packaging material 2 is calculated, the latest calculation result is compared with the remaining amount determination result stored in the packaging control unit 201, and the latest calculation result. And the calculation result of the previous calculation are compared. When the latest calculation result is smaller than the remaining amount determination result and the number of times the latest calculation result continuously matches the calculation result of the previous calculation is equal to or greater than the threshold, the latest calculation result is replaced with the new remaining amount. Store as determination result. In yet another example, even if it is not continuously determined that the latest calculation result is smaller than the remaining amount determination result, the number of times that the latest calculation result is determined to be smaller than the remaining amount determination result is accumulated to exceed the threshold. When it becomes, the remaining amount judgment result is updated.

  In any case, the effect of improving the detection accuracy of the remaining amount of the packaging material 2 can be similarly achieved.

  Even if the amount of the packaging material 2 to be unwound from the wound body 3 is small due to sticking of the packaging material 2 to the wound body 3, etc. Returning to the original unwinding according to the rotation of 3, the remaining amount of the original packaging material 2 is calculated.

  In the above embodiments, the unwinding / winding motor 35 is a stepping motor, and the drive amount of the unwinding / winding motor 35 is measured by counting the number of steps of the stepping motor. It is not limited. As a configuration in which the packaging control unit 201 includes a timer, the driving amount may be measured based on the driving time of the unwinding / winding motor 35. In this case, the unwinding / winding motor 35 need not be a stepping motor, and any type of motor can be used as the unwinding / winding motor 35.

  Although the embodiment of the present invention has been described as above, the embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  DESCRIPTION OF SYMBOLS 1 Packaging apparatus, 2 packaging material, 3 wound body, 5 supply part, 6 accommodating part formation part, 6h heater, 6m pressurization motor, 8 packaging material conveyance part, 8m conveyance motor, 9 packaging part, 10 packaging material supply part , 11 Direction change bar, 12 Cutting part, 13 Discharging part, 15 Frame, 20 Casing, 20a Outer surface, 21 Mounted part, 22 Guide hole, 23 Dancer roller, 24, 25 Fixed roller, 26 Unlocking part, 27 Limit Position sensor, 28 Fixed position sensor, 29 Retraction position sensor, 30 Sensor support part, 31, 38, 45, 66 Spring hook part, 35 Motor, 40 Main arm, 41 First arm part, 42 Second arm part, 43 Bending Part, 44 arm rotation shaft, 46 return spring, 47 lock pin, 50 sub-arm, 51 base end part, 52 tip part, 53, 65 cylindrical part, 55 gear positioning Plate, 72 Intermediate gear, 73 Intermediate pinion gear, 74 Roller gear, 75 Intermediate gear shaft, 78 Lock part, 90 Spring hinge, 101 Drug supply device, 102 Case, 104 Lower case, 108, 109 Door, 200 Overall control part, 201 Packaging control unit, DR transport direction.

Claims (7)

A driving unit that generates a driving force for rotating the wound body around which the long sheet-shaped packaging material is wound and unwinding the packaging material from the wound body;
A packaging unit that sequentially wraps a packaging object using the packaging material unwound from the wound body;
A transport unit that transports the packaging material unwound from the wound body along a transport path;
A tension applying unit that includes a displacement member that is displaceable in a direction intersecting the transport path, and the displacement member applies tension to the packaging material by pressing the packaging material;
A position detector for detecting the position of the displacement member;
A controller that controls the drive unit and the transport unit,
The displacement member has a fixed position,
The position detector is capable of detecting whether the displacement member is in the fixed position;
The controller is
While the packaging material is intermittently conveyed by the conveyance unit and the conveyance of the packaging material by the conveyance unit is being performed, driving of the wound body by the driving unit is stopped, and the conveyance unit While the conveyance of the packaging material is stopped, the driving is performed so that the packaging material is unwound from the wound body until the position detection unit detects that the displacement member is in the fixed position. Drive the wound body by the section,
Each time the driving unit drives the wound body, the position detecting unit detects that the displacement member is in the fixed position after the driving unit starts driving the wound body. Measuring the drive amount of the drive unit until the time of, and based on the measurement result, calculating the remaining amount of the packaging material in the wound body,
A packaging device that updates a remaining amount determination result stored as a remaining amount of the packaging material based on a plurality of calculation results. The controller is
Each time the remaining amount of the packaging material in the wound body is calculated, the latest calculation result is compared with the remaining amount determination result,
The packaging device according to claim 1, wherein the remaining amount determination result is updated when the number of times that the latest calculation result is determined to be smaller than the remaining amount determination result is equal to or greater than a threshold value. The controller is
Each time the remaining amount of the packaging material in the wound body is calculated, the latest calculation result is compared with the remaining amount determination result,
The packaging device according to claim 1, wherein the remaining amount determination result is updated when the number of times that the latest calculation result is continuously determined to be smaller than the remaining amount determination result is equal to or greater than a threshold value. The controller is
Every time the remaining amount of the packaging material in the wound body is calculated, the latest calculation result and the remaining amount determination result are compared, and the latest calculation result and the calculation result of the previous calculation are compared,
When the latest calculation result is smaller than the remaining amount determination result, and the number of times of continuous determination that the latest calculation result matches the calculation result of the previous calculation is equal to or greater than a threshold, the latest calculation The packaging device according to claim 1, wherein the result is stored as a new remaining amount determination result. The drive unit is a stepping motor,
The said control part is a packaging apparatus of any one of Claims 1-4 which measures the drive pulse number of the said stepping motor as a drive amount of the said drive part.   The packaging device according to any one of claims 1 to 4, wherein the control unit measures a drive time of the drive unit as a drive amount of the drive unit.   The packaging device according to any one of claims 1 to 6, wherein the control unit sets a rotation speed of the driving unit according to a remaining amount of the packaging material in the wound body.

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