JP6673685B2 - Weighing and packaging system - Google Patents

Description

  The present invention relates to a weighing and packaging system for combining and weighing articles and packaging the weighed articles.

  Conventionally, a weighing and packaging system including a combination weighing device and a packaging device has been used. The combination weighing device divides articles into a plurality of weighing containers, selects a combination of weighing containers such that the total weight of the divided articles falls within a predetermined range, and discharges the articles from the weighing containers. The packaging device laterally seals the lower end of the tube-shaped packaging material, then puts the articles discharged from the weighing container inside the packaging material, and laterally seals the upper end of the packaging material, Manufacture a bag enclosing the article.

  Patent Document 1 (Japanese Patent Application Laid-Open No. 2010-137953) discloses a collecting hopper of a combination weighing device. The collecting hopper stores the articles to be weighed in the storage section, and drops the stored articles from a lower opening formed when the pair of gates are opened, thereby disposing the articles under the lower opening. The article is supplied to the receiving port of the packaging device. The storage portion has a tapered shape as it goes downward. The inner surface of each gate forming the storage section is curved. Therefore, even if the article is a snack confection or the like in which fine powder is liable to be generated, it is possible to prevent poor sealing and clogging of the article in the packaging device due to the falling of the fine powder of the article when the gate is opened.

  However, the conventional weighing and packaging system stops the entire system immediately when the horizontal seal mechanism detects an abnormality such as a bad seal due to biting of an article, or a clogging of an article discharged from the combination weighing apparatus. Alternatively, an inspection device installed downstream of the packaging device is used to detect and remove a laterally sealed bag while the article is being bitten. For this reason, there is a problem that the operation efficiency of the combination weighing device and the packaging device is reduced by stopping the system and removing the bag in which the abnormality is detected.

  An object of the present invention is to provide a weighing and packaging system capable of automatically adjusting the operations of a combination weighing device and a packaging device and optimizing the operation even if an abnormality is detected when packaging an article. That is.

  A weighing and packaging system according to the present invention includes a weighing device, a packaging device, and a control unit. The weighing device divides the articles into a plurality of weighing containers, selects a combination of weighing containers such that the total weight of the divided articles is within a predetermined range, and discharges the articles from the weighing containers included in the selected combination. I do. The packaging device receives and discharges the articles discharged from the weighing device with the bags while forming the bags from the packaging material. The control unit controls the weighing device and the packaging device. The packaging device has a pair of seal units and a detection unit. The pair of seal portions is for sandwiching and sealing the packaging material in the lateral direction. The detection unit detects the biting of the article by the pair of seal units. When the detecting unit detects the biting of the article, the control unit acquires biting information on biting of the article, and adjusts the operation of the weighing device based on the biting information.

  In this weighing and packaging system, a pair of seal portions of the packaging device detects a biting abnormality in which an article is bitten when the packaging material is sealed in the lateral direction. When detecting the biting abnormality, the control unit of the weighing and packaging system controls the operation of the weighing device based on the biting information so that the biting abnormality does not occur any more. The biting information is, for example, a position where the article is bitten in the pair of seal portions. The control unit controls the timing of discharging articles by the weighing device. Therefore, the weighing and packaging system can optimize the operation by automatically adjusting the operations of the weighing device and the packaging device even if an abnormality is detected when packaging the article.

  Further, it is preferable that the control unit adjusts the timing at which the article is discharged from the weighing container.

  This weighing and packaging system adjusts the timing at which articles are ejected so that articles ejected from the weighing container do not bite into the pair of seal portions.

  In addition, it is preferable that the weighing device discharges the articles from the weighing containers included in the combination at predetermined time intervals, and the control unit adjusts the time intervals.

  This weighing and packaging system, for example, lengthens the time interval when discharging articles from the plurality of weighing containers one by one so that the articles discharged from the plurality of weighing containers do not collide with each other during dropping and become clogged. Thus, the articles are dispersed and discharged from the weighing device. Thereby, the falling behavior of the articles discharged from the weighing device is stabilized.

  Further, it is preferable that the control unit adjusts the number of weighing containers included in the combination selected by the weighing device.

  This weighing and packaging system disperses articles from the weighing device by increasing the number of weighing containers that discharge articles, for example, so that articles discharged from a plurality of weighing containers do not collide with each other during dropping and become clogged. And drain. Thereby, the falling behavior of the articles discharged from the weighing device is stabilized.

  Further, it is preferable that the control unit adjusts the position of the weighing container included in the combination selected by the weighing device.

  This weighing and packaging system adjusts the position of the weighing container that discharges the articles so that the articles discharged from the plurality of weighing containers do not collide with each other while falling and become clogged. Thereby, the falling behavior of the articles discharged from the weighing device is stabilized.

  Further, it is preferable that the control unit adjusts the order of discharging the articles from the weighing container based on the weight of the articles in the weighing container included in the combination selected by the weighing device.

  The weighing and packaging system adjusts the order in which the articles discharged from the plurality of weighing containers are discharged one by one so that the articles discharged from the plurality of weighing containers do not collide with each other during dropping and become clogged. Thereby, the falling behavior of the articles discharged from the weighing device is stabilized.

  Further, it is preferable that the control unit adjusts the speed at which the packaging device packs the article when the detection unit detects the biting of the article.

  In this weighing and packaging system, for example, the packaging capacity of the packaging device is temporarily reduced so that the articles discharged from the weighing container do not bite into the pair of seal portions.

  The weighing and packaging system according to the present invention can optimize operations by automatically adjusting the operations of the combination weighing device and the packaging device even when an abnormality is detected when packaging an article.

1 is a perspective view of a weighing and packaging system according to an embodiment of the present invention. It is a side view of a weighing packaging system. It is a front view which shows the schematic structure of a weighing packaging system. It is a perspective view which shows the schematic structure of a bag making and packaging unit. It is the side view which looked at the horizontal sealing mechanism of the bag making and packaging unit from the right. It is the side view which looked at the locus of a pair of seal jaw of a horizontal seal mechanism from the right. It is a side view in the state where a pair of seal jaws of a side seal mechanism is performing a sealing operation. It is a block diagram of a control unit. It is a figure which shows typically arrangement | positioning of ten weighing hoppers when a combination weighing unit is seen from above.

  An embodiment of the present invention will be described with reference to the drawings. The embodiment described below is one specific example of the present invention, and does not limit the technical scope of the present invention.

(1) Overall configuration of weighing and packaging system FIG. 1 is a perspective view of a weighing and packaging system 100 according to one embodiment of the present invention. FIG. 2 is a side view of the weighing and packaging system 100. FIG. 3 is a front view showing a schematic configuration of the weighing and packaging system 100. The weighing and packaging system 100 mainly includes a combination weighing unit 2, a bag making and packaging unit 3, a film supply unit 4, an operation switch 5, a liquid crystal display 6, and a control unit 7 (see FIG. 8).

  The combination weighing unit 2 measures a predetermined amount of the packaged object C by combination weighing. In the present embodiment, the packaged object C is a light and brittle food such as potato chips. The combination weighing unit 2 discharges the measured object to be packaged C downward and supplies it to the bag making and packaging unit 3. The detailed configuration and operation of the combination weighing unit 2 will be described later.

  The bag making and packaging unit 3 is arranged below the combination weighing unit 2. The bag making and packaging unit 3 wraps the supplied packaged object C with the film F at the timing when the packaged item C is supplied from the combination weighing unit 2. The film F is a sheet-like thin packaging material. In the process of sealing the film F, the bag making and packaging unit 3 manufactures a bag B in which the article C is sealed. The detailed configuration and operation of the bag making and packaging unit 3 will be described later.

  The film supply unit 4 is installed adjacent to the bag making and packaging unit 3. The film supply unit 4 supplies the film F to the bag making and packaging unit 3. In the film supply unit 4, a film roll 4a around which the film F is wound is set. The film supply unit 4 feeds out the film F from the film roll 4 a and supplies the film F to the bag making and packaging unit 3.

The operation switch 5 and the liquid crystal display 6 are attached to the front of the weighing and packaging system 100 main body. The liquid crystal display 6 is a touch-panel display arranged at a position where the operator of the operation switch 5 can visually recognize the liquid crystal display. Operation switch 5 and the liquid crystal display 6, an instruction for weighing and packaging system 100, and functions as an input device for accepting setting for the weighing and packaging system 100. The liquid crystal display 6 functions as an output device that displays information about the weighing and packaging system 100 .

  The control unit 7 is a computer including a CPU, a ROM, a RAM, and the like. The control unit 7 is connected to the combination weighing unit 2, the bag making and packaging unit 3, the film supply unit 4, the operation switch 5, and the liquid crystal display 6. The control unit 7 controls the combination weighing unit 2, the bag making and packaging unit 3, and the film supply unit 4 based on inputs from the operation switch 5 and the liquid crystal display 6, and outputs various information to the liquid crystal display 6. The detailed configuration and operation of the control unit 7 will be described later.

(2) Configuration of combination weighing unit The combination weighing unit 2 is a weighing machine for measuring a predetermined amount of the packaged object C. The article to be packaged C weighed by the combination weighing unit 2 is supplied to the bag making and packaging unit 3. The combination weighing unit 2 mainly includes a dispersion feeder 21, a plurality of troughs 22, a plurality of pool hoppers 23, a plurality of weighing hoppers 24, a collecting chute 25, and a plurality of weight sensors 26.

  When the packaged object C to be weighed is supplied to the combination weighing unit 2, the supplied packaged object C is dropped near the center of the dispersion feeder 21. As shown in FIG. 3, a plurality of troughs 22 are provided on the periphery of the dispersion feeder 21. Vibration from a vibration device (not shown) is applied to the dispersion feeder 21 and the trough 22. Thereby, as shown by the arrow in FIG. 3, the packaged object C supplied to the dispersion feeder 21 falls through each trough 22 and is stored in the pool hopper 23 corresponding to each trough 22.

  Each pool hopper 23 is disposed above a weighing hopper 24 corresponding to each pool hopper 23. The pool hopper 23 temporarily stores the articles C to be supplied to the corresponding weighing hoppers 24. Each weighing hopper 24 has a weight sensor 26. The weight sensor 26 outputs a load signal according to the weight of the packaged object C supplied to the corresponding weighing hopper 24. The weight sensor 26 is, for example, a load cell.

  The combination weighing of the article to be packaged C by the combination weighing unit 2 is executed by the following procedure. First, the weight of the packaged object C stored in each weighing hopper 24 is detected by the weight sensor 26. Next, of the sums obtained by the detected combinations of the weights, the combination closest to the desired value is obtained by calculation. The desired value is the weight of a predetermined amount of the article C to be supplied to the bag making and packaging unit 3. Next, the packages C are discharged from the weighing hoppers 24 corresponding to the obtained combinations toward the collecting chute 25. As a result, a predetermined amount of the articles to be packaged C discharged to the collecting chute 25 is supplied to the bag making and packaging unit 3. Then, the weighing hopper 24, which has been discharged and emptied, is refilled with the packaged objects C, so that the combined weighing for measuring the predetermined amount of the packaged items C is performed again.

  In this embodiment, it is assumed that the combination weighing unit 2 includes ten weighing hoppers 24. When the combination weighing unit 2 is viewed from above in the vertical direction, the ten weighing hoppers 24 are arranged at equal intervals along a virtual circumference (see FIG. 9).

(3) Configuration of Bag Making and Packaging Unit FIG. 4 is a perspective view showing a schematic configuration of the bag making and packaging unit 3. In the following description, six directions including “front (front)”, “rear (back)”, “up”, “down”, “left”, and “right” are defined as shown in FIG. .

  The bag making and packaging unit 3 mainly includes a forming mechanism 13, a pull-down belt mechanism 14, a vertical sealing mechanism 15, a horizontal sealing mechanism 16, and a rotary encoder 40. The forming mechanism 13 forms the sheet-like film F supplied from the film supply unit 4 into a cylindrical shape. The pull-down belt mechanism 14 conveys the cylindrically formed film F downward. The vertical sealing mechanism 15 seals the overlapping portions at both ends of the cylindrical film F in the vertical direction parallel to the transport direction to form the cylindrical film Fc. The horizontal sealing mechanism 16 seals the tubular film Fc at two locations in the horizontal direction orthogonal to the transport direction to form a bag B having upper and lower ends horizontally sealed. The rotary encoder 40 detects biting of the tubular film Fc in the sealed portion by the horizontal sealing mechanism 16.

(3-1) Forming Mechanism The forming mechanism 13 has a tube 13a and a former 13b. The tube 13a is a cylindrical member whose upper end and lower end are open. An article to be packaged C supplied from the combination weighing unit 2 is put into the opening at the upper end of the tube 13a. The former 13b is arranged so as to surround the tube 13a. When passing through the gap between the tube 13a and the former 13b, the film F fed out from the film roll of the film supply unit 4 is wound around the tube 13a and formed into a tubular shape. The tube 13a and the former 13b can be replaced according to the size of the bag B to be manufactured.

(3-2) Pull-down Belt Mechanism The pull-down belt mechanism 14 conveys the film F wound around the tube 13a while sucking the film F downward. The pull-down belt mechanism 14 mainly includes a driving roller 14a, a driven roller 14b, and a pair of belts 14c. As shown in FIG. 4, the pair of belts 14c are arranged so as to sandwich the tube 13a on both left and right sides of the tube 13a, and have a mechanism for adsorbing the film F formed in a cylindrical shape. The pull-down belt mechanism 14 conveys the cylindrically formed film F downward by rotating the pair of belts 14c by the driving roller 14a and the driven roller 14b.

(3-3) Vertical Sealing Mechanism The vertical sealing mechanism 15 seals the cylindrically formed film F in the vertical direction (vertical direction in FIG. 4). The vertical sealing mechanism 15 is disposed on the front side of the tube 13a. The vertical seal mechanism 15 is moved in the front-rear direction by a driving mechanism (not shown) so as to approach the tube 13a or to move away from the tube 13a.

  When the vertical seal mechanism 15 is driven by the drive mechanism so as to approach the tube 13a, the vertically overlapping portion of the film F wound around the tube 13a is sandwiched between the vertical seal mechanism 15 and the tube 13a. The vertical sealing mechanism 15 heats the overlapping portion of the film F by pressing the overlapping portion of the film F against the tube 13a with a constant pressure by the driving mechanism, thereby thermally sealing the overlapping portion of the film F in the vertical direction to form the cylindrical film Fc. . The vertical sealing mechanism 15 has a heater for heating the overlapping portion of the film F, a heater belt for contacting the overlapping portion of the film F, and the like.

(3-4) Horizontal Seal Mechanism The horizontal seal mechanism 16 includes a pair of seal jaws 51 (seal jaws 51a and 51b) or a pair of seal jaws 52 (seal jaws 52a and 52b), as described later. Thus, the portion to be sealed of the cylindrical film Fc conveyed downward is sandwiched in a direction (here, left and right direction) intersecting with the conveying direction of the cylindrical film Fc, and a horizontal sealing mechanism is provided.

  FIG. 5 is a side view of the horizontal seal mechanism 16 as viewed from the right. FIG. 6 is a side view of the trajectory of the pair of seal jaws 51 and 52 of the horizontal seal mechanism 16 as viewed from the right. FIG. 7 is a side view showing a state in which the pair of seal jaws 51 and 52 of the horizontal seal mechanism 16 perform a sealing operation.

  As shown in FIG. 5, the horizontal seal mechanism 16 mainly has a first rotating body 50a, a second rotating body 50b, and a horizontal pressing mechanism 56. The first rotating body 50a is arranged on the front side of the tubular film Fc (the left side in FIG. 5). The second rotating body 50b is arranged on the back side of the tubular film Fc (right side in FIG. 5). As described later, when the tubular film Fc is sandwiched between the pair of seal jaws 51 or the pair of seal jaws 52, the horizontal direction pressing mechanism 56 controls the cylinder between the pair of seal jaws 51 or the pair of seal jaws 52. The first rotating shaft 53a of the first rotating body 50a is constantly pressed (toward the rear) toward the second rotating shaft 53b of the second rotating body 50b so that the film Fc is pressed. In FIG. 5, the direction in which the first rotation shaft 53a is pressed toward the second rotation shaft 53b is drawn by a right-pointing arrow A1.

(3-4-1) Rotating Body The configuration and operation of the first rotating body 50a and the second rotating body 50b will be described in detail.

(3-4-1-1) First rotating body As shown in FIG. 5, the first rotating body 50a mainly includes a first rotating shaft 53a, a pair of levers 54a, a pair of levers 55a, a seal jaw 51a, and It has a seal jaw 52a.

  The first rotating shaft 53a is a rotating shaft of the first rotating body 50a extending in the left-right direction. The first rotating body 50a rotates around the rotation center C1 around the first rotating shaft 53a as a rotation axis in a side view (see FIG. 5).

  The pair of levers 54a are connected near both ends in the longitudinal direction of the first rotating shaft 53a (near both ends in the left-right direction). Each lever 54a extends from the first rotation shaft 53a in the radial direction of the first rotation shaft 53a. Each lever 54a extends from the first rotation shaft 53a in the same direction and parallel to the other lever 54a.

  The pair of levers 55a are connected near both ends in the longitudinal direction of the first rotating shaft 53a (near both ends in the left-right direction). Each lever 55a extends from the first rotation shaft 53a in the radial direction of the first rotation shaft 53a. Each lever 55a extends in parallel from the first rotation shaft 53a in the same direction as the other lever 55a.

  The lever 54a and the lever 55a connected near the right end of the first rotating shaft 53a extend point-symmetrically with respect to the rotation center C1 of the first rotating body 50a in a side view (see FIG. 5). In other words, the lever 54a and the lever 55a connected near the right end of the first rotating shaft 53a extend in the opposite direction to the rotation center C1 of the first rotating body 50a in a side view (see FIG. 5). The lever 54a and the lever 55a connected near the left end of the first rotating shaft 53a extend point-symmetrically with respect to the rotation center C1 of the first rotating body 50a in a side view. In other words, the lever 54a and the lever 55a connected near the left end of the first rotating shaft 53a extend in the opposite direction to the rotation center C1 of the first rotating body 50a in a side view.

  The seal jaw 51a forms one of the pair of seal jaws 51. The seal jaw 51 is an example of a seal member. The seal jaw 51a has a seal surface 511a whose longitudinal direction is the left-right direction (see FIG. 7).

  The seal jaw 51a functions as a pair with a seal jaw 51b described later, and seals a portion to be sealed of the tubular film Fc. More specifically, the seal jaw 51 includes a cylindrical film Fc formed by a seal surface 511a having a longitudinal direction in the left-right direction of the seal jaw 51a and a seal surface 511b having a longitudinal direction in the left-right direction of the seal jaw 51b described later. (See FIG. 7).

  Both ends of the seal jaw 51a in the longitudinal direction (left-right direction) of the seal surface 511a are connected to ends of a lever 54a extending from the first rotation shaft 53a. Since the lever 54a is connected to the first rotation shaft 53a as described above, the seal jaw 51a is connected to the first rotation shaft at both ends in the longitudinal direction (left-right direction) of the sealing surface 511a via the pair of levers 54a. It is supported by 53a.

  The seal jaw 52a constitutes one of the pair of seal jaws 52. The seal jaw 52 is an example of a seal member. The seal jaw 52a has a seal surface (not shown) whose longitudinal direction is the left-right direction.

  The seal jaw 52a functions as a pair with a seal jaw 52b described later, and seals a portion to be sealed of the tubular film Fc. More specifically, the seal jaw 52 has a cylindrical shape formed by a seal surface having a longitudinal direction in the left-right direction of the seal jaw 52a and a seal surface (not shown) having a longitudinal direction in the left-right direction of the seal jaw 52b described later. The portion to be sealed of the film Fc is sandwiched, and laterally sealed in the left-right direction.

  Both ends in the longitudinal direction (left-right direction) of the seal surface of the seal jaw 52a are connected to ends of a lever 55a extending from the first rotation shaft 53a. Since the lever 55a is connected to the first rotation shaft 53a as described above, the seal jaw 52a is connected to the first rotation shaft at both ends in the longitudinal direction (left-right direction) of the sealing surface via the pair of levers 55a. It is supported by 53a. Further, since the lever 54a and the lever 55a extend in the opposite direction with respect to the rotation center C1 of the first rotating body 50a in a side view, the sealing jaw 52a is configured to rotate the sealing jaw 51a and the rotation of the first rotating body 50a. It is arranged at a position 180 ° away from the center C1.

(3-4-1-2) Second rotating body As shown in FIG. 5, the second rotating body 50b mainly includes a second rotating shaft 53b, a pair of levers 54b, a pair of levers 55b, a seal jaw 51b, and It has a seal jaw 52b.

  The second rotating shaft 53b is a rotating shaft of the second rotating body 50b extending in the left-right direction. The second rotator 50b rotates around the rotation center C2 about the second rotation shaft 53b as a rotation axis in a side view (see FIG. 5).

  The pair of levers 54b are connected near both ends in the longitudinal direction of the second rotating shaft 53b (near both ends in the left-right direction). Each lever 54b extends from the second rotation shaft 53b in the radial direction of the second rotation shaft 53b. Each lever 54b extends in parallel in the same direction as the other lever 54b from the second rotation shaft 53b.

  The pair of levers 55b are connected near both ends in the longitudinal direction of the second rotating shaft 53b (near both ends in the left-right direction). Each lever 55b extends from the second rotation shaft 53b in the radial direction of the second rotation shaft 53b. Each lever 55b extends from the second rotation shaft 53b in the same direction and parallel with the other lever 55b.

  The lever 54b and the lever 55b connected near the right end of the second rotating shaft 53b extend point-symmetrically with respect to the rotation center C2 of the second rotating body 50b in a side view (see FIG. 5). In other words, the lever 54b and the lever 55b connected near the right end of the second rotating shaft 53b extend in the opposite direction to the rotation center C2 of the second rotating body 50b in a side view (see FIG. 5). The lever 54b and the lever 55b connected near the left end of the second rotating shaft 53b extend point-symmetrically with respect to the rotation center C2 of the second rotating body 50b in a side view. In other words, the lever 54b and the lever 55b connected near the left end of the second rotating shaft 53b extend in the opposite direction to the rotation center C2 of the second rotating body 50b in a side view.

  The seal jaw 51b constitutes one of the pair of seal jaws 51. The seal jaw 51b has a seal surface 511b whose longitudinal direction is the left-right direction (see FIG. 7). The seal jaw 51b functions as a pair with the seal jaw 51a as described above, and seals a portion to be sealed of the tubular film Fc.

  Both ends of the seal jaw 51b in the longitudinal direction (left-right direction) of the seal surface 511b are connected to ends of a lever 54b extending from the second rotation shaft 53b. Since the lever 54b is connected to the second rotating shaft 53b as described above, the sealing jaw 51b is connected to the second rotating shaft 53 at both ends in the longitudinal direction (left-right direction) of the sealing surface 511b via the pair of levers 54b. It is supported by 53b.

  The seal jaw 52b constitutes one of the pair of seal jaws 52. The seal jaw 52b has a seal surface (not shown) whose longitudinal direction is the left-right direction. As described above, the seal jaw 52b functions as a pair with the seal jaw 52a, and seals a portion to be sealed of the tubular film Fc.

  Both ends in the longitudinal direction (left-right direction) of the seal surface of the seal jaw 52b are connected to ends of a lever 55b extending from the second rotation shaft 53b. Since the lever 55b is connected to the second rotation shaft 53b as described above, the seal jaw 52b is connected to the second rotation shaft at both ends in the longitudinal direction (left-right direction) of the sealing surface via the pair of levers 55b. It is supported by 53b. Further, since the lever 54b and the lever 55b extend in the opposite direction to the rotation center C2 of the second rotating body 50b in a side view, the seal jaw 52b is configured to rotate the sealing jaw 51b and the rotation of the second rotating body 50b. It is arranged at a position 180 ° away from the center C2.

(3-4-1-3) Operation of first and second rotating bodies The first rotating body 50a rotates in a side view when the first rotating shaft 53a is driven by a drive motor (not shown). It is rotated about the center C1 (see FIG. 6). The second rotating body 50b is rotated about a rotation center C2 in a side view by driving the second rotating shaft 53b by a drive motor (not shown) (see FIG. 6). Thus, the seal jaws 51a and 52a are rotated along the circular orbit about the rotation center C1 and the seal jaws 51b and 52b are rotated about the rotation center C2 (see FIG. 6). When viewed from the right, the first rotating body 50a is rotated clockwise about the rotation center C1 (see FIG. 6). In other words, the seal jaws 51a and 52a are rotated clockwise around the rotation center C1 when viewed from the right side. On the other hand, when viewed from the right side, the second rotating body 50b is rotated counterclockwise about the rotation center C2 (see FIG. 6). In other words, when viewed from the right side, the seal jaws 51b and 52b are rotated counterclockwise about the rotation center C2.

  The first rotating body 50a has its both ends supported by a horizontal moving plate 61 (see FIG. 5) in the horizontal sealing direction (in the left-right direction). More specifically, both ends in the left-right direction of the first rotating shaft 53a of the first rotating body 50a are supported by the horizontal moving plate 61. On the other hand, both ends of the second rotating body 50b are supported by the fixed plate 62 (see FIG. 5) in the horizontal sealing direction (in the left-right direction). More specifically, both ends in the left-right direction of the second rotating shaft 53b of the second rotating body 50b are supported by fixed plates 62. The fixing plate 62 is fixed to a frame (not shown) of the bag making and packaging unit 3a.

  The horizontal moving plate 61 is pressed toward the fixed plate 62 by the horizontal pressing mechanism 56 (see the arrow A1 in FIG. 5). As a result, the first rotating shaft 53a supported by the horizontal moving plate 61 is pressed by the horizontal pressing mechanism 56 toward the second rotating shaft 53b supported by the fixed plate 62.

(3-4-2) Horizontal pressing mechanism The horizontal pressing mechanism 56 will be described. The horizontal pressing mechanism 56 is an example of a fluid pressure utilizing pressing mechanism. The horizontal pressing mechanism 56 presses the first rotating shaft 53a toward the second rotating shaft 53b using air pressure. Note that, here, the horizontal pressing mechanism 56 uses air pressure, but is not limited to this, and may use, for example, hydraulic pressure.

  The horizontal pressing mechanism 56 mainly has an air cylinder 80, a first connecting rod 81, a connecting plate 82, and a second connecting rod 83, as shown in FIG.

  The air cylinder 80 is driven by air pressure. The air cylinder 80 is connected to a connection plate 82 via a first connection rod 81 extending rearward from the air cylinder 80. When the air cylinder 80 is driven, a force is transmitted through the first connecting rod 81, and the connecting plate 82 is pressed rearward. In FIG. 5, the direction in which the connection plate 82 is pressed is indicated by the rightward arrow A1.

  The second connecting rod 83 is a rod-shaped member that connects the connecting plate 82 and the horizontal moving plate 61. The horizontal pressing mechanism 56 has four second connecting rods 83. One end of the second connecting rod 83 is connected to the connecting plate 82. The two second connecting rods 83 extend forward and parallel from near the upper right corner and near the lower right corner of the connecting plate 82. Although not shown, the remaining two second connecting rods 83 extend from the vicinity of the upper left corner and the vicinity of the lower left corner of the connecting plate 82 in parallel toward the front. Two second connecting rods 83 extending forward from near the right end of the connecting plate 82 are connected to the horizontal moving plate 61 arranged on the right side of the first rotating body 50a. Two second connecting rods 83 extending forward from near the left end of the connecting plate 82 are connected to the horizontal moving plate 61 disposed on the left side of the first rotating body 50a. The second connecting rod 83 is not connected to the fixed plate 62, and extends through the fixed plate 62 so as to be slidable. The vicinity of the end (front end) of the second connecting rod 83 opposite to the connecting plate 82 is slidably supported by a rod supporting member 83a fixed to the frame of the bag making and packaging unit 3a. Since the second connecting rod 83 is slidably supported by the rod supporting member 83a, the horizontal moving plate 61 connected to the second connecting rod 83 can move in a direction approaching or moving away from the fixed plate 62. . In other words, the first rotating shaft 53a supported by the horizontal moving plate 61 can move in a direction approaching or moving away from the second rotating shaft 53b supported by the fixed plate 62. The force of the air cylinder 80 and the force acting on the seal jaw 51a from the seal jaw 51b or on the seal jaw 52a from the seal jaw 52b when the seal jaw 51 or 52 seals the tubular film Fc horizontally. The first rotation shaft 53a moves in a direction approaching or moving away from the second rotation shaft 53b due to the balance between.

(3-4-3) Sealing Operation by Seal Jaw Next, the sealing operation by the seal jaw 51 will be described. More specifically, the horizontal sealing of the tubular film Fc by the seal jaw 51 and the separation of the horizontally sealed bag B from the cylindrical film Fc by the seal jaw 51 during the sealing operation by the seal jaw 51 will be described. .

  The first rotating body 50a and the second rotating body 50b rotate (refer to the arrow indicated by the two-dot chain line in FIG. 6 for the rotating direction), and the first rotating shaft 53a is moved by the horizontal pressing mechanism 56 to the second rotating shaft 53b. (See the arrow A2 shown below the first rotating body 50a in FIG. 6 for the pressing direction), the sealing jaws 51a and 51b are connected to the sealing surface 511a and the sealing jaws 51a of the sealing jaws 51a. The cylindrical film Fc conveyed downward is sandwiched and pressed between the sealing surfaces 511b of 51b (see FIG. 7). As shown in FIG. 7, the seal surface 511a and the seal surface 511b have serrations 512a and 512b that mesh with each other. The seal jaw 51 sandwiches the cylindrical film Fc so that the teeth of the serrations 512a of the sealing surface 511a and the teeth of the serrations 512b of the sealing surface 511b are engaged with each other, and presses the cylindrical film Fc. A heater 71 (see FIG. 7) is provided inside the seal jaws 51a and 51b, and the heater 71 heats the seal surfaces 511a and 511b. When the sealing surface 511a and the sealing surface 511b are heated in a state where the cylindrical film Fc is sandwiched between the sealing surface 511a and the sealing surface 511b, the sealed portion of the cylindrical film Fc is heat-sealed. The cylindrical film Fc conveyed downward is heat-sealed in order from the downstream side (front side in the conveying direction) to the upstream side (rear side in the conveying direction).

  A knife 72a for separating the bag B from the tubular film Fc is attached to the seal jaw 51b in the vicinity of the center of the seal surface 511b in the short direction (the direction orthogonal to the longitudinal direction of the seal surface 511b). The knife 72a is attached so that its blade edge protrudes toward the seal jaw 51a during the sealing operation between the seal jaw 51a and the seal jaw 51b (see FIG. 7). In the seal jaw 51a, a groove 72b is formed in the vicinity of the center of the seal surface 511a in the short direction (the direction orthogonal to the longitudinal direction of the seal surface 511a), in which the knife 72a projecting from the seal jaw 51b toward the seal jaw 51a is engaged. ing. The knife 72a is formed as an oblique blade, and cuts the bag B from the cylindrical film Fc from one end in the horizontal sealing direction (left-right direction) to the other end.

  Since the knife 72a is attached near the center of the sealing surface 511b in the lateral direction of the sealing jaw 51b, the sealing jaw 51 performs the following steps 1 to 3 in this order as one sealing operation.

Step 1: The tubular film Fc is horizontally sealed.
Step 2: On the upstream side of the position where the horizontal sealing was performed in Step 1, the bag B horizontally sealed is cut from the tubular film Fc using the knife 72a.
Step 3: The tubular film Fc is horizontally sealed upstream of the position cut by the knife 72a in step 2.

  However, the timing at which the horizontal seal or the tubular film Fc is cut at Steps 1 to 3 may partially overlap the timing at which the other Steps 1 to 3 are performed. That is, the cutting of the tubular film Fc of Step 2 may be started at a timing when the horizontal seal of Step 1 is not completely completed, and the cutting of the tubular film Fc of Step 2 is not completed. , The horizontal seal of step 3 may be started.

  The horizontal sealing of the cylindrical film Fc by the seal jaws 52 and the separation of the laterally sealed bag B from the cylindrical film Fc at the seal jaws 52 are the same as those of the seal jaws 51, and therefore the description is omitted here. I do.

(3-5) Rotary Encoder The rotary encoder 40 is fixed to the frame of the bag making and packaging unit 3a. The rotation shaft of the rotary encoder 40 has an end on the front side (the side opposite to the side connected to the connection plate 82) of the second connection rod 83 so that the rotation shaft rotates when the second connection rod 83 moves in the front-rear direction. Part. Two rotary encoders 40 are provided. The rotation shaft of one rotary encoder 40 is engaged with the end of the second connection rod 83 disposed on the upper right side among the four second connection rods 83. The rotation shaft of another rotary encoder 40 is engaged with an end of a second connection rod 83 disposed on the upper left side. However, the present invention is not limited to this, and the rotating shaft of one rotary encoder 40 is engaged with the end of the second connecting rod 83 disposed on the lower right side, and the other rotary encoder 40 The rotation shaft may be engaged with an end of a second connection rod 83 disposed on the lower left side.

  The rotary encoder 40 measures the amount of movement of the second connecting rod 83 in the front-rear direction by measuring the rotation angle of the rotation shaft of the rotary encoder 40. The amount of movement of the second connecting rod 83 in the front-rear direction is determined by the amount of the second rotating shaft attached to the fixed plate 62 of the first rotating shaft 53 a attached to the horizontal moving plate 61 connected to the second connecting rod 83. It is equal to the amount of movement for 53b. In other words, the rotary encoder 40 measures the rotation angle of the rotation shaft of the rotary encoder 40, and thereby the first rotation shaft 53a moves in the direction in which the first rotation shaft 53a approaches or separates from the second rotation shaft 53b. The amount of movement with respect to the two rotation shafts 53b is measured.

  Here, as described above, the amount of movement of the second connecting rod 83 connected to the horizontal moving plate 61 disposed on the right side of the first rotating shaft 53a is determined by the rotary encoder 40 and the amount of movement of the first rotating shaft 53a. The moving amount of the second connecting rod 83 connected to the horizontal moving plate 61 arranged on the left side is measured. In other words, the amount of movement of the first rotation shaft 53a with respect to the second rotation shaft 53b on the right end portion (the amount of right movement) and the amount of movement of the first rotation shaft 53a on the left end portion are determined by the rotary encoder 40. And the amount of movement (the amount of left movement) with respect to. Therefore, even when only one of the left and right ends of the first rotating shaft 53a approaches or separates from the second rotating shaft 53b, this can be detected.

  As will be described later, the rotary encoder 40 is used to detect the occurrence of biting in the sealed portion of the tubular film Fc when the seal jaws 51 and 52 horizontally seal the tubular film Fc.

(4) Configuration of Control Unit FIG. 8 is a block diagram of the control unit 7. The control unit 7 is connected to the combination weighing unit 2, the film supply unit 4, the pull-down belt mechanism 14, the vertical seal mechanism 15, the horizontal seal mechanism 16, the operation switch 5, and the liquid crystal display 6. The control unit 7 includes a bite determination unit 7a, a discharge timing adjustment unit 7b, a discharge interval adjustment unit 7c, a discharge container number adjustment unit 7d, a discharge container position adjustment unit 7e, a discharge container order adjustment unit 7f, And a packaging capacity adjusting unit 7g. Hereinafter, the discharge timing adjustment unit 7b, the discharge interval adjustment unit 7c, the discharge container number adjustment unit 7d, the discharge container position adjustment unit 7e, the discharge container order adjustment unit 7f, and the packaging capacity adjustment unit 7g are collectively adjusted as necessary. Parts 7b to 7g are called. The bite determination unit 7a and the adjustment units 7b to 7g are programs stored in the control unit 7. Details of these programs will be described later.

  The control unit 7 is connected to each component of the combination weighing unit 2 and forms a part of the combination weighing unit 2 as a control unit of the combination weighing unit 2. Further, the control unit 7 includes the components of the bag making and packaging unit 3 (mainly, a pull-down belt mechanism 14, a vertical seal mechanism 15, and a horizontal seal mechanism 16 (driving motors for driving the first and second rotating shafts 53a and 53b, And, it is connected to the air cylinder 80 of the horizontal pressing mechanism 56), the rotary encoder 40, and the film supply unit 4). The control unit 7 constitutes a part of the bag making and packaging unit 3 as a control unit of the bag making and packaging unit 3. The control unit 7 controls the combination weighing unit 2 and the bag making and packaging unit 3 by executing the stored program. The control unit 7 controls the combination weighing unit 2 and the bag making and packaging unit 3 such that the combination weighing unit 2 and the bag making and packaging unit 3 perform the following operations, for example.

  In the combination weighing unit 2, the weight of the packaged object C is weighed by the plurality of weighing hoppers 24, and these weighed values are combined so as to have a predetermined total amount. Discharged downward. The control unit 7 controls the combination weighing unit 2 so that these series of operations are performed. The article to be packaged C discharged from the combination weighing unit 2 is dropped onto the upper opening end of the tube 13a of the bag making and packaging unit 3.

  The control unit 7 controls the film supply unit 4 so that the film F is supplied to the forming mechanism 13 as a control unit that controls the bag making and packaging unit 3. The control unit 7 serves as a control unit for controlling the bag making and packaging unit 3 so that the film F (tubular film Fc) formed into a cylindrical shape by the molding mechanism 13 is conveyed downward so as to be conveyed downward. Control. Further, the control unit 7 controls the vertical sealing mechanism 15 as a control unit for controlling the bag making and packaging unit 3 so that the overlapping portions of both ends of the cylindrical film Fc conveyed downward are sealed in the vertical direction. I do. Further, the control unit 7 serves as a control unit that controls the bag making and packaging unit 3 and moves downward in accordance with the timing at which the article to be packaged C discharged from the combination weighing unit 2 is discharged from the lower opening end of the tube 13a. The horizontal sealing mechanism 16 is controlled such that the cylindrical film Fc conveyed in the horizontal direction is sealed in the horizontal direction, and the sealed bag B is separated from the cylindrical film Fc on the upstream side.

  The control unit 7 has a bite determination unit 7a as one of the functions of the bag making and packaging unit 3. The bite determination unit 7a determines whether the seal jaws 51 and 52 are performing horizontal sealing based on the amount of movement (the amount of rightward movement and the amount of leftward movement) of the first rotary shaft 53a with respect to the second rotary shaft 53b measured by the rotary encoder 40. Then, it is determined whether or not biting has occurred in the sealed portion of the tubular film Fc. The bite of the tubular film Fc at the sealed portion occurs, for example, when the cut object of the packaged object C and the tubular film Fc is sandwiched between the seal jaws 51 and 52 at the sealed portion.

  The main cause of the occurrence of biting in the sealed portion of the cylindrical film Fc is that the falling behavior of the packaged object C in the tube 13a is disturbed and the timing at which the packaged object C is thrown into the cylindrical film Fc. Is shifted from the normal state. Specific causes of the falling behavior of the packaged object C being that the size and weight of the packaged item C vary, that the packaged item C is temporarily clogged in the tube 13a, that the packaged item C Is soared in the tube 13a by an air current or the like, and the packaged object C dropped from the plurality of weighing hoppers 24 collides in the tube 13a.

  The bite determination unit 7a of the control unit 7 calculates the amount of movement of the first rotary shaft 53a with respect to the second rotary shaft 53b between the case where there is no bite in the sealed portion and the case where there is bite in the sealed portion. Utilizing the difference between the two, the presence or absence of biting is determined.

  When there is a bite in the sealed portion, the bite determination unit 7a can acquire the height position where the bite has occurred based on a time change of the movement amount or the like. For example, in the seal jaws 51a and 51b shown in FIG. 7, the bite determination unit 7a can obtain at which height position (up-down position) of the seal surfaces 511a and 511b the bite has occurred. . Accordingly, for example, the biting determination unit 7a can determine whether biting has occurred above the knife 72a and the groove 72b, or whether biting has occurred below the knife 72a and the groove 72b. it can.

(5) Operation of Control Unit The operation of the control unit 7 of the weighing and packaging system 100 will be described in detail. As described above, the biting determination unit 7a of the control unit 7 determines whether biting of the packaged object C or the like in the sealed portion of the tubular film Fc is performed based on the measurement data of the movement amount by the rotary encoder 40. I do. Each time the horizontal sealing mechanism 16 horizontally seals the cylindrical film Fc, the biting determination unit 7a determines whether biting has occurred in the horizontally sealed portion.

  The control unit 7 controls the operations of the combination weighing unit 2 and the bag making and packaging unit 3 so that when the biting occurrence rate exceeds the target upper limit value, the biting does not occur any more. The biting occurrence rate is calculated, for example, based on the number of times that the occurrence of biting is detected by the biting determination unit 7a each time the bag making and packaging unit 3 performs the horizontal sealing operation a predetermined number of times. The predetermined number of times is, for example, 1000 times, but can be set arbitrarily. For example, it is assumed that when the bag making and packaging unit 3 has performed the horizontal sealing operation 1000 times, which is a predetermined number of times, the occurrence of biting is detected 10 times during the 1000 horizontal sealing operations. At this time, the biting occurrence rate is calculated as 10 out of 1000 times, that is, 1%. When the biting occurrence rate exceeds a predetermined target upper limit (for example, 2%), the control unit 7 operates the combination weighing unit 2 and the bag making and packaging unit 3 to suppress the biting occurrence rate to the target upper limit or less. Control. This control is executed by the adjusting units 7b to 7g of the control unit 7.

  When the bite occurrence rate exceeds the target upper limit, the control unit 7 controls the operations of the combination weighing unit 2 and the bag making and packaging unit 3 based on the bite information. The biting information is information on a biting state in the sealed portion of the tubular film Fc. The biting information is, for example, information on a height position where biting has occurred on the sealing surfaces of the seal jaws 51 and 52. The biting determination unit 7a can acquire biting information when detecting biting in the sealed portion of the tubular film Fc.

  Next, each operation of the adjusting units 7b to 7g of the control unit 7 will be described. The control unit 7 executes at least one program among the adjustment units 7b to 7g when the biting occurrence rate exceeds the target upper limit value. Among the adjustment units 7b to 7g, the program executed by the control unit 7 can be set arbitrarily. Note that the control unit 7 may execute only one program of the adjustment units 7b to 7g, or may execute a combination of a plurality of programs of the adjustment units 7b to 7g.

(5-1) Discharge Timing Adjustment Unit The discharge timing adjustment unit 7b discharges the package C from the weigh hopper 24 so that the package C discharged from the weigh hopper 24 is not caught by the seal jaws 51 and 52. Automatically adjust the timing at which it is done.

  For example, when the biting determination unit 7a acquires biting information indicating that biting has occurred above the knife 72a and the groove 72b, the discharge timing adjustment unit 7b outputs the packaged object C from the weighing hopper 24. Is delayed by a predetermined time. Thus, after the tubular film Fc is completely horizontally sealed by the seal jaws 51 and 52, the article to be packaged C is put into the tubular film Fc above the horizontally sealed portion. Therefore, the object to be packaged C is prevented from being caught in the seal jaws 51 and 52.

  Further, for example, when the control unit 7 acquires biting information indicating that biting has occurred below the knife 72a and the groove 72b, the discharge timing adjustment unit 7b discharges the packaged object C from the weighing hopper 24. The timing to be advanced by a predetermined time. Thus, after the article to be packaged C is loaded into the tubular film Fc, the tubular film Fc is horizontally sealed by the sealing jaws 51 and 52 above the loaded article to be packaged C. Therefore, the object to be packaged C is prevented from being caught in the seal jaws 51 and 52.

  Therefore, the discharge timing adjusting section 7b can reduce the occurrence of biting in the sealed portion of the tubular film Fc by automatically adjusting the timing at which the packaged object C is discharged.

(5-2) Discharge Interval Adjustment Unit When discharging the packaged object C from the plurality of weighing hoppers 24 selected by the combination weighing unit 2, the control unit 7 simultaneously removes the packaged object C from the plurality of weighing hoppers 24. The operation of discharging the packaged object C from one weighing hopper 24 without discharging it is performed a plurality of times with a predetermined time interval (hereinafter, referred to as a “discharge interval”). The packaged object C can be discharged.

  The discharge interval adjusting unit 7c automatically adjusts the discharge interval. The discharge interval is set, for example, at intervals of 20 milliseconds. The upper limit value of the discharge interval is set to, for example, 200 milliseconds, and can be set to another value. The longer the discharge interval, the longer the discharge interval, which is the time from when the packaged object C is discharged from one weighing hopper 24 to when the packaged object C is discharged from the next weighing hopper 24. As the discharge interval is longer, the articles C discharged from the plurality of weighing hoppers 24 are more dispersed and fall in the tube 13a.

  The discharge interval adjusting unit 7c disperses and drops the articles C in the tube 13a, so that the articles C discharged from the plurality of weighing hoppers 24 fall while falling in the tube 13a. Suppress collision. When the articles to be packaged C collide with each other in the tube 13a, the collided articles to be packaged may form a large lump, and the article to be packaged C may be temporarily clogged in the tube 13a. As the package C is more dispersed and falls in the tube 13a, the frequency of collision of the package C in the tube 13a decreases, and the temporary clogging of the package C in the tube 13a is suppressed. . Further, when the articles to be packaged C collide with each other in the tube 13a, the timing at which the article to be packaged C is loaded into the cylindrical film Fc is delayed, and the article to be packaged C may be pinched between the seal jaws 51 and 52. is there. Therefore, the more the packaged object C falls in the tube 13a, the more the packaged product C is suppressed from being caught by the seal jaws 51 and 52.

  Therefore, by automatically adjusting the discharge interval, the discharge interval adjusting unit 7c can reduce the occurrence of biting in the sealed portion of the tubular film Fc.

(5-3) Number-of-Discharge-Containers Adjustment Unit The number-of-discharge-containers adjustment unit 7d is a discharge container that is the number of the weighing hoppers 24 that discharge the articles C when the combination weighing unit 2 combines and weighs the articles C. Adjust the number automatically. The number of discharge containers may be different each time the combination weighing unit 2 combines and weighs the articles C to be packaged. Therefore, as the number of discharge containers, the average value of the number of weighing hoppers 24 that discharge the packaged object C when the combination weighing unit 2 has combinedly weighed the packaged object C a predetermined number of times is used. The number of discharge containers can be set, for example, in 0.5 units.

  The smaller the number of discharge containers, the larger the average weight of the packaged items C temporarily stored in the weighing hopper 24. Therefore, as the number of discharge containers is smaller, while the articles C are falling in the tubes 13a, the articles C collide with each other in the tubes 13a, and the articles C are temporarily stored in the tubes 13a. May be clogged. Conversely, as the number of discharge containers increases, the articles C discharged from the plurality of weighing hoppers 24 are more dispersed in the tube 13a and fall. In this way, by appropriately setting the discharge interval by the discharge interval adjusting unit 7c, the falling behavior of the packaged object C in the tube 13a can be controlled.

  By increasing the number of discharge containers, the discharge container number adjusting unit 7d disperses and drops the package C in the tube 13a, and the package C discharged from the plurality of weighing hoppers 24 is placed in the tube 13a. Are prevented from colliding with each other while falling and temporarily clogging in the tube 13a. Therefore, as the package C is more dispersed and falls in the tube 13a, the temporary clogging of the package C in the tube 13a is suppressed, and the package C is sandwiched between the seal jaws 51 and 52. Is suppressed.

  Therefore, by automatically adjusting the number of discharge containers, the discharge container number adjusting unit 7d can reduce the occurrence of biting in the sealed portion of the tubular film Fc.

(5-4) Discharge Container Position Adjustment Unit The discharge container position adjustment unit 7e is a discharge container that is the position of the weighing hopper 24 that discharges the package C when the combination weighing unit 2 combines and weighs the package C. Adjust position automatically. FIG. 9 is a diagram schematically illustrating the arrangement of ten weighing hoppers 24a to 24j when the combination weighing unit 2 is viewed from above along the vertical direction. In FIG. 9, the weighing hoppers 24b to 24j are arranged clockwise from the position where the weighing hopper 24a is arranged. In FIG. 9, the positions of the collecting chute 25 and the tube 13a of the bag making and packaging unit 3 are indicated by dotted lines for reference.

  In FIG. 9, the weighing hopper 24a and the weighing hopper 24f are arranged at positions facing each other with the tube 13a interposed therebetween. Therefore, when the packages C are discharged from the weighing hoppers 24a and 24f at the same time, the packages C discharged from the weighing hoppers 24a and the packages C discharged from the weighing hoppers 24f are arranged as shown in FIG. As shown by the arrow in FIG. 5, the sliding down occurs on the collecting chute 25 in opposite directions, so that there is a risk of a frontal collision when entering the tube 13a. When the packages C discharged from the different weighing hoppers 24a to 24j collide with each other in the tube 13a, the package C may be temporarily clogged in the tube 13a as described above.

  However, in FIG. 9, for example, the weighing hopper 24a and the weighing hopper 24c are in a relationship where they are not arranged at positions facing each other with the tube 13a interposed therebetween. In this case, when the packages C are discharged from the weighing hoppers 24a and 24c at the same time, the packages C discharged from the weighing hoppers 24a and the packages C discharged from the weighing hoppers 24c are illustrated in FIG. As indicated by an arrow 9, no frontal collision occurs when entering the tube 13a, so that the packaged object C is prevented from being temporarily clogged in the tube 13a.

  Therefore, when selecting the combination of the weighing hoppers 24 based on the weight of the packaged objects C temporarily stored in the weighing hoppers 24, the discharge container position adjusting unit 7e is positioned to face each other across the tube 13a. The position of the discharge container is automatically adjusted so that the set of the related weighing hoppers 24 is not included in the combination. Thereby, the temporary clogging of the packaged object C in the tube 13a is suppressed, and the packaged object C is suppressed from being caught by the seal jaws 51 and 52.

  Therefore, by automatically adjusting the position of the discharge container, the discharge container position adjusting unit 7e can reduce the occurrence of biting in the sealed portion of the tubular film Fc.

(5-5) Discharge Container Order Adjusting Unit The discharge container order adjusting unit 7f temporarily stores in the weighing hoppers 24 discharging the package C when the combination weighing unit 2 combines and weighs the package C. The order in which the articles C are discharged from the respective weighing hoppers 24 is automatically adjusted based on the weight of the articles C to be packaged.

  The discharge container order adjusting unit 7f, for example, discharges the packages C in descending order of the weight of the packages C temporarily stored in the weighing hopper 24 that discharges the packages C. For example, it is assumed that the combination weighing unit 2 has selected a combination of four weighing hoppers 24 when combining and weighing the articles C to be packaged. In this case, the weights of the articles to be packaged C temporarily stored in the four weighing hoppers 24 are W1, W2, W3, and W4, respectively. The magnitude relationship between the weights W1 to W4 is W1 <W2 <W3 <W4. In this case, the discharge container order adjusting unit 7f includes four items of the package C having the weight W4, the package C having the weight W3, the package C having the weight W2, and the package C having the weight W1. The package C is discharged four times from the weighing hopper 24.

  In the case where the packaged object C is a light article such as potato chips, if the weight of the packaged object C discharged from the weighing hopper 24 and falling in the tube 13a is small, the airflow from below during the fall in the tube 13a. Due to the above, the packaged object C may soar up and hardly fall. When the packaged object C rising in the tube 13a collides with the packaged object C discharged from another weighing hopper 24 and falling in the tube 13a, the temporary clogging of the packaged item C in the tube 13a may occur. May occur. Conversely, as the weight of the packaged object C discharged from the weighing hopper 24 and falling in the tube 13a increases, such a collision is suppressed. Therefore, the discharge container order adjusting unit 7f discharges the packages C in order of decreasing weight of the packages C temporarily stored in the weighing hopper 24 that discharges the packages C, so that the inside of the tube 13a is discharged. , The temporary clogging of the packaged object C is suppressed, and the packaged object C is prevented from being caught in the seal jaws 51 and 52.

  Therefore, the discharge container order adjusting section 7f can automatically reduce the occurrence of biting in the sealed portion of the tubular film Fc by automatically adjusting the order in which the packages C are discharged from the respective weighing hoppers 24. it can.

(5-6) Packing Capacity Adjusting Unit The packing capacity adjusting unit 7g automatically adjusts the packing capacity, which is the ability of the bag making and packaging unit 3 to pack the articles C into the bags B per unit time. Hereinafter, for example, in the case where the bag making and packaging unit 3 can manufacture 20 bags B in which the items to be packaged C are sealed in one minute, the packaging capacity is expressed as 20 bpm. The packaging capacity can be set, for example, in units of 5 bmp.

  As the packaging capacity of the bag making and packaging unit 3 is higher, it becomes more difficult to synchronize the timing at which the packaged object C is discharged from the weighing hopper 24 and the timing at which the horizontal sealing mechanism 16 horizontally seals the cylindrical film Fc. . Therefore, when the entrapment of the tubular film Fc in the sealed portion is detected, the packaging ability adjusting unit 7g temporarily lowers the packaging ability, so that the packaging object C is discharged from the weighing hopper 24 at the timing. In addition, it is possible to easily synchronize the timing at which the horizontal sealing mechanism 16 horizontally seals the cylindrical film Fc. Thereby, the to-be-packaged object C is suppressed from being pinched by the seal jaws 51 and 52.

  Therefore, by automatically adjusting the wrapping ability, the wrapping capacity adjusting section 7g can reduce the occurrence of biting in the sealed portion of the tubular film Fc.

(6) Features The control unit 7 of the weighing and packaging system 100 controls the operations of the combination weighing unit 2 and the bag making and packaging unit 3 by the adjustment units 7b to 7g when the bite occurrence rate exceeds the target upper limit value. The occurrence rate of biting can be suppressed to the target upper limit value or less. That is, the control unit 7 operates the combination weighing unit 2 and the bag-making and packaging unit 3 when the sealing jaws 51 and 52 of the horizontal sealing mechanism 16 frequently bite the packaged object C or the like during the operation of the weighing and packaging system 100. Can be automatically optimized to reduce the occurrence of biting at the sealed portion of the tubular film Fc.

  Accordingly, the weighing and packaging system 100 can quickly optimize the operations of the combination weighing unit 2 and the bag making and packaging unit 3 without manual intervention even if an abnormality is detected when packaging the article to be packaged C. Can be. Therefore, the weighing and packaging system 100 can effectively suppress the occurrence of defective products and improve the operation rate.

(7) Modifications Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the invention.

(7-1) Modification A
In the embodiment, the control unit 7 of the weighing and packaging system 100 executes an arbitrary program among the adjustment units 7b to 7g. However, the control unit 7 may sequentially execute a plurality of programs among the adjustment units 7b to 7g based on a predetermined priority. In this case, after executing one program of the adjusting units 7b to 7g, the control unit 7 executes another program of the adjusting units 7b to 7g when the biting occurrence rate is still higher than the target upper limit value. , Execute a program having a lower priority than the previously executed program. The execution order of the programs is the same as the predetermined priority.

  For example, when the bite occurrence rate exceeds the target upper limit, the control unit 7 causes the discharge interval adjustment unit 7c, the number of discharge containers adjustment unit 7d, the discharge container position adjustment unit 7e, and the packaging capacity adjustment unit 7g to perform one operation in this order. It may be executed one by one. In this case, after first executing the discharge interval adjusting unit 7c, the control unit 7 determines whether or not the biting occurrence rate is equal to or less than the target upper limit value, and the biting occurrence rate still exceeds the target upper limit value. If so, the discharge container number adjusting unit 7d is executed.

  In this modification, it is preferable that the lowest priority is assigned to the packaging capacity adjusting unit 7g that may greatly affect the overall efficiency of the weighing and packaging system 100. That is, when executing a plurality of programs among the adjustment units 7b to 7g, it is preferable that the control unit 7 executes the packaging ability adjustment unit 7g last.

(7-2) Modification B
In the embodiment, as an example of the control by the discharge container order adjusting unit 7f, the packages C are discharged in the descending order of the weight of the packages C temporarily stored in the weighing hopper 24 that discharges the packages C. The control to be performed has been described. However, when the combination weighing unit 2 combines and weighs the packages C, the discharge container order adjusting unit 7f outputs the packages C temporarily stored in each of the weighing hoppers 24 that discharge the packages C. You may discharge the to-be-packaged thing C based on another order based on weight. In this case, the user of the weighing and packaging system 100 may set the order of discharging the packaged items C using the operation switch 5 and the liquid crystal display 6.

  For example, it is assumed that the combination weighing unit 2 has selected a combination of four weighing hoppers 24 when combining and weighing the articles C to be packaged. In this case, the weights of the articles to be packaged C temporarily stored in the four weighing hoppers 24 are W1, W2, W3, and W4, respectively. The magnitude relationship between the weights W1 to W4 is W1 <W2 <W3 <W4. In this case, the following first to fourth modes can be cited as settings relating to the order in which the packaged items C are discharged.

  In the first mode, as in the embodiment, the packages C are discharged in descending order of the weight of the packages C. In this case, the discharge container order adjusting unit 7f includes four items of the package C having the weight W4, the package C having the weight W3, the package C having the weight W2, and the package C having the weight W1. The package C is discharged four times from the weighing hopper 24. Hereinafter, the order of discharging the packaged items C is represented as W4 → W3 → W2 → W1.

  In the second mode, the packages C are discharged in order of decreasing weight of the packages C. That is, the order of discharging the packaged items C is W1 → W2 → W3 → W4.

  In the third mode, the heaviest package C is discharged first, and then the lightest package C is discharged, and so on. That is, the order of discharging the packaged items C is W4 → W1 → W3 → W2.

  In the fourth mode, the lightest packaged object C is discharged first, then the heaviest packaged product C is discharged, and so on. That is, the order of discharging the packaged items C is W1 → W4 → W2 → W3.

  In this modification, the combination weighing unit 2 discharges the packaged object C according to the weight of the packaged object C supplied to the bag making and packaging unit 3 at one time, and the shape and specific gravity of the packaged object C. The order of discharging the packaged items C temporarily stored in the measuring hopper 24 can be selected from the first to fourth modes. The user of the weighing and packaging system 100 appropriately selects the setting (the first to fourth modes, etc.) regarding the order in which the plurality of weighing hoppers 24 discharge the to-be-packaged objects C. Can be suppressed temporarily, and the occurrence of biting in the sealed portion of the tubular film Fc can be reduced.

2 Combination weighing unit (weighing device)
3 Bag-making and packaging unit (packaging device)
7 control unit (control unit)
24 Weighing hopper (weighing container)
40 rotary encoder (detection unit)
51a, 51b A pair of first seal jaws (a pair of seal portions)
52a, 52b A pair of second seal jaws (a pair of seal portions)
100 Measuring and packaging system B Bag C Packaged object (article)
F film (packaging material)

JP 2010-137953 A

Claims (8)

Dividing the article into a plurality of weighing containers, selecting a combination of the weighing containers so that the total weight of the categorized articles is within a predetermined range, and removing the articles from the weighing containers included in the selected combination. A weighing device to discharge,
While forming a bag from the packaging material, a packaging device for receiving and packaging the articles discharged from the weighing device in the bag,
A control unit that controls the weighing device and the packaging device,
With
The packaging device,
A pair of sealing portions for sandwiching and sealing the packaging material in the lateral direction,
A detection unit that detects the biting of the article by the pair of seal units during packaging of the article,
Has,
The control unit, when the detection unit detects the biting of the article, acquires biting information about biting of the article, based on the biting information, the detection unit has detected biting relating to the article in which the metering device is discharged later than the article to adjust the discharge operation from a plurality of the weighing container of the weighing device,
Weighing and packaging system. The control unit adjusts the timing at which the article is discharged from the weighing container,
The weighing and packaging system according to claim 1. The weighing device discharges the articles at predetermined time intervals from the weighing containers included in the combination,
The control unit adjusts the time interval,
The weighing and packaging system according to claim 1. The control unit adjusts the number of the weighing containers included in the combination selected by the weighing device,
The weighing and packaging system according to claim 1. The control unit adjusts the position of the measuring container included in the combination selected by the measuring device,
The weighing and packaging system according to claim 1. The control unit adjusts the order of discharging the articles from the weighing container based on the weight of the articles in the weighing container included in the combination selected by the weighing device,
The weighing and packaging system according to any one of claims 1 to 5. The control unit, when the detection unit detects the biting of the article, adjusts the speed at which the packaging device packs the article,
The weighing and packaging system according to any one of claims 1 to 6. The control unit adjusts the discharge operation of the weighing device when the bite occurrence rate of the article exceeds a target upper limit value,
The weighing and packaging system according to any one of claims 1 to 7.

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