JP7233668B2 - bag making and packaging machine - Google Patents

Description

The present invention relates to a bag making and packaging machine.

2. Description of the Related Art Conventionally, there has been known a bag-making and packaging machine that sandwiches a molded film and has a seal portion that forms a seal region to manufacture a bag containing an article (for example, Patent Literature 1). The bag-making and packaging machine described in Patent Document 1 includes detection means for detecting the drive current of the servomotor during the sandwiching operation of the sealing portion. In this form-fill-seal machine, by comparing the detected deviation between the drive current value and the reference drive current value with a threshold value, it is determined whether or not an article is caught in the sealing area.

Japanese Patent No. 4897346

In such a form-fill-seal machine, an operator adjusts the threshold value. This adjustment work is carried out by comparing the drive current during the pinching operation of the sealing portion with the threshold value. Therefore, it is difficult to intuitively recognize the relationship between the driving current value and the threshold during the pinching operation. Therefore, the threshold adjustment work becomes inefficient.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a bag making and packaging machine capable of efficiently adjusting a threshold value for determining whether or not an article is caught in a sealing area.

A bag-manufacturing and packaging machine according to the present invention is a bag-manufacturing and packaging machine that manufactures a bag containing an article, and includes a seal portion that sandwiches a formed film and forms a seal area, and A motion data acquisition unit that acquires motion data related to the amount of motion, a threshold value acquisition unit that acquires a threshold value for determining whether or not an article is caught in the sealing area based on the motion data, and motion data for each bag production. and a display unit that displays the relationship with the threshold in a time-series graph.

In this bag making and packaging machine, the relationship between the operation data for each bag production and the threshold value is displayed in a time-series graph. Therefore, the validity of the threshold value can be intuitively recognized more easily than when the relationship between the momentary motion data and the threshold value is displayed. As a result, it is possible to efficiently adjust the threshold for determining whether or not an article is caught in the sealing area.

In the form-fill-seal machine according to the present invention, the threshold acquisition unit may be an operation unit that receives a threshold adjustment operation by an operator. In this case, the operator can intuitively recognize the appropriateness of the threshold from the display of the graph on the display, and can efficiently adjust the threshold via the operation unit.

In the form-fill-seal machine according to the present invention, the motion data and the threshold value may be expressed as relative values based on the motion amount when no articles are caught in the sealing area. In this case, since the relationship between the motion data and the threshold value is displayed based on the motion data when no article is caught in the sealing area, the validity of the threshold value can be more intuitively recognized.

In the form-fill-seal machine according to the present invention, the sealing section has a pair of sealing jaws for sandwiching the film and a servomotor for driving the sealing jaws, and the operation data acquisition section detects the operation amount of the servomotor. It is an encoder, and the unit of operation data may be the number of pulses of the encoder. In this way, the number of pulses of the encoder is used as operation data without being converted into other data, so that the conversion error is less than when the number of pulses is converted into data such as the distance between the seal jaws. You can prevent it from happening.

In the form-fill-seal machine according to the present invention, the display unit may display the operation data for each production of the bag in a line graph. In this case, the visibility is improved, for example, compared to the case where the operation data for each production of the bag is displayed by dots (plots).

In the form-fill-seal machine according to the present invention, the display section may display the polygonal lines indicating the operation data and the threshold value for each bag production, with at least one of the colors and line types of the polygonal lines being different from each other. In this case, the visibility is improved compared to, for example, the case of displaying polygonal lines with the same color and line type.

In the bag-making and packaging machine according to the present invention, a graph may be displayed in which the order of manufactured bags is shown on the horizontal axis and the operation data and threshold values are shown on the vertical axis. In this case, the chronological order of the bags produced is displayed, making the graph easier to recognize.

In the bag making and packaging machine according to the present invention, the display unit may be a touch panel that can change at least one of the range of the horizontal axis and the range of the vertical axis in the graph by touch operation. In this case, since the range of the horizontal axis and the range of the vertical axis can be easily changed, the work of adjusting the threshold becomes more efficient.

According to the present invention, it is possible to provide a form-fill-seal machine capable of efficiently adjusting a threshold value for determining whether or not an article is caught in a sealing area.

FIG. 1 is a perspective view of a bag making and packaging machine according to one embodiment of the present invention. 2 is a side view of a packaging system including the bag making and packaging machine of FIG. 1. FIG. FIG. 3(a) is a plan view of the lateral sealing device during operation. FIG. 3(b) is a plan view of the horizontal sealing device during the standby period. 4 is a block diagram of the packaging system of FIG. 1; FIG. FIG. 5 is a diagram illustrating an example of a graph displayed by the display unit; FIG. 6 is another diagram showing an example of the graph displayed by the display unit. FIG. 7 is a diagram showing a modified example of the graph displayed by the display unit. FIG. 8 is a diagram showing another modified example of the graph displayed by the display unit.

Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or corresponding elements are denoted by the same reference numerals, and overlapping descriptions are omitted.

As shown in FIGS. 1 and 2, the bag making and packaging machine 10 has an input section 12 protruding from the upper surface of the main body 11, and stores articles A input through the input section 12 to form a bag. It is an apparatus for manufacturing B.

As shown in FIG. 2, the bag making and packaging machine 10 of the present embodiment constitutes a packaging system 1 together with a combination weighing device 100 as an example. In the packaging system 1, the goods A are weighed by the combination weighing device 100, and the bags B containing the goods A are manufactured by the bag making and packaging machine 10. FIG. In the packaging system 1, the article A is weighed so that the entire bag B has a predetermined target value, and the bag B containing the article A is manufactured.

As shown in FIG. 2, the combination weighing device 100 includes an article supply chute 101, a distribution table 102, a plurality of radial feeders 103, a plurality of pool hoppers 104, a plurality of weighing hoppers 105, and a collective discharge chute section. 106 and a timing hopper 107 . The combination weighing device 100 is continuously supplied with articles A, such as food, by a cross feeder CF.

Articles A continuously supplied by the cross feeder CF are thrown into an article supply chute 101 . Article supply chute 101 supplies article A to distribution table 102 . The distribution table 102 distributes and supplies the articles A to a plurality of radiant feeders 103 arranged around it. Each radial feeder 103 supplies articles A to a pool hopper 104 arranged to correspond to each radial feeder 103 . Each pool hopper 104 supplies articles A to weigh hoppers 105 arranged to correspond to each pool hopper 104 .

In the combination weighing device 100, a combination weighing calculation is performed based on the weight values of the items A in the weighing hopper 105, and the combination of the items A whose result of the combination weighing calculation is within a predetermined allowable range and is closest to the target value is determined. selected. The articles A in the weighing hopper 105 included in the selected combination are supplied to the timing hopper 107 via the collective discharge chute section 106 . The timing hopper 107 supplies the article A to the input section 12 of the bag making and packaging machine 10 at a predetermined timing.

The bag making and packaging machine 10 includes a display section (threshold value acquisition section, operation section) 13 , a packaging section 20 and a control section 50 . The display unit 13 is attached to the side of the main body 11 . The packaging section 20 and the control section 50 are housed in the main body 11 .

The packaging section 20 includes a film supply mechanism 21 , a former 22 , a pull-down belt mechanism 23 , a vertical sealing device 24 and a horizontal sealing device (sealing section) 30 . The film supply mechanism 21 supports the original roll of the film F and feeds out the strip-shaped film F. As shown in FIG. The former 22 has a sailor 22a and a tube 22b. The sailor 22a and the tube 22b guide the unwound film F so as to fold it, and overlap both edges of the film F in the width direction. That is, the former 22 forms the film F into a tubular shape. The pull-down belt mechanism 23 feeds the tubular film F along the centerline direction of the tube (hereinafter referred to as "feeding direction D") while pressing it against the tube 22b.

The vertical sealing device 24 heat-seals the film F sent by the pull-down belt mechanism 23 to form a vertical sealing area (sealing area) S1. More specifically, when the film F is fed by the pull-down belt mechanism 23, the vertical sealing device 24 heat-seals both edges of the overlapped film F, thereby vertically sealing both edges. A seal area S1 is formed. The film F on which the vertical sealing area S1 is formed is sent to the horizontal sealing device 30 by the pull-down belt mechanism 23. As shown in FIG.

The lateral sealing device 30 performs a sandwiching operation to sandwich the film F on which the vertical sealing region S1 is formed, and heat-seals the film to form the lateral sealing region S2. As shown in FIG. 3, the horizontal sealing device 30 includes a pair of sealing jaws 31 for sandwiching the film F, a servomotor 32 for driving the pair of sealing jaws 31, and a connection between the servomotor 32 and the pair of sealing jaws 31. and a crank mechanism 33 that A pair of sealing jaws 31 is provided with a heater (not shown). A heater may be provided only in one sealing jaw 31 of the pair of sealing jaws 31 . The sealing process for forming the laterally sealed area S2 is not limited to the heat sealing process.

The servomotor 32 is fixed to the main body 30a of the lateral sealing device 30 via a mounting member 34. As shown in FIG. The rotating shaft of the servomotor 32 is connected to each of the plate members 35 and 36 via the crank mechanism 33 . The servomotor 32 has an encoder 32a that detects the amount of movement of the servomotor 32 . The encoder 32a acquires the number of pulses, which is the amount of operation of the servomotor 32, as the amount of operation of the lateral sealing device 30 during the sandwiching operation. The encoder 32a functions as an operation data acquisition unit that acquires operation data related to the amount of operation of the lateral sealing device 30 during the clamping operation together with the control unit 50, which will be described later.

The plate member 35 is fixed to support rods 37 at both ends thereof. Support rods 37 pass through the plate member 36 at both ends thereof, and the plate member 36 is slidable along the extending direction of the support rods 37 . The plate member 38 is fixed to the support rods 37 at both ends thereof. The support rod 37 slidably penetrates a plurality of rod support portions 39 fixed to the main body 30a. As a result, when the plate member 36 and the plate member 38 approach each other due to the rotation of the servomotor 32, the pair of sealing jaws 31 approach each other (see FIG. 3(a)). When the plate member 36 and the plate member 38 are separated from each other by the rotation of the servomotor 32, the pair of sealing jaws 31 are separated from each other (see FIG. 3B).

The lateral sealing device 30 further includes a cutter device 40 attached to the plate material 38 . The cutter device 40 has, for example, a cutter 41 having a serrated blade and a composite cylinder 42 . The cutter 41 is housed inside the seal jaw 31 on the side opposite to the crank mechanism 33 .

In the horizontal sealing device 30, the film F on which the vertical sealing region S1 is formed is sandwiched in the direction intersecting the feeding direction D (opposing direction of the sealing jaws 31) by bringing the pair of sealing jaws 31 closer to each other. , a heat sealing process is performed by the heat of the heater. As a result, the bag B is sealed and a horizontal seal region S2 forming the bottom of the next bag B is formed. In a state in which the pair of sealing jaws 31 sandwich the film F, the composite cylinder 42 presses the cutter 41 against the film F, thereby cutting the film F and manufacturing the bag B. As shown in FIG.

As shown in FIG. 4, the control unit 50 has a CPU (Central Processing Unit) 51 and a memory 52 including ROM (Read Only Memory) and RAM (Random Access Memory). The control unit 50 is electrically connected to each of the display unit 13 , the pull-down belt mechanism 23 , the vertical sealing device 24 , the horizontal sealing device 30 and the combination weighing device 100 . The control unit 50 implements various functions by loading programs stored in the ROM into the RAM and being executed by the CPU 51 . In the memory 52, information such as parameters used for manufacturing the bag B is stored.

The control unit 50 controls the operation of the vertical sealing device 24 , the pull-down belt mechanism 23 and the horizontal sealing device 30 . The control unit 50 controls the operation of the pull-down belt mechanism 23 so that the feeding of the film F and the stopping of the film F are repeated while the bag making and packaging machine 10 is in operation. In addition, the operations of the vertical sealing device 24 and the horizontal sealing device 30 are controlled so that the vertical sealing region S1 and the horizontal sealing region S2 are formed. That is, the bag making and packaging machine 10 is configured as an intermittent bag making and packaging machine. When the operation of the bag-making and packaging machine 10 is interrupted, the control unit 50 controls the operation of the pull-down belt mechanism 23 so as to stop the feeding of the film F, and does not form the vertical sealing area S1 and the horizontal sealing area S2. The operations of the vertical sealing device 24 and the horizontal sealing device 30 are controlled as follows.

The control unit 50 executes torque control to increase the torque of the servo motor 32 so that it reaches a predetermined torque in the process of sandwiching the film F between the pair of sealing jaws 31 when forming the lateral sealing region S2. do. The control unit 50 stops the servo motor 32 when the torque of the servo motor 32 reaches a predetermined torque as a result of the film F being pinched by execution of the torque control (hereinafter referred to as "maximum torque"). The operation of the lateral sealing device 30 is controlled as follows. In the sandwiching operation for the bag B, the distance between the pair of sealing jaws 31 in the facing direction is the narrowest at maximum torque. The interval corresponds to the thickness of the formed lateral seal region S2 in the facing direction. That is, when the article A is caught in the lateral seal area S2, the gap becomes larger than when the article A is not caught. Therefore, by focusing on the operation amount of the servomotor 32 at the time of maximum torque, it is possible to examine whether or not the threshold value is appropriate for each bag B with respect to the operation amount.

The control unit 50 determines whether or not the article A is caught in the laterally sealed area S2 based on the operation data. The control unit 50 acquires motion data based on the motion amount of the servomotor 32 . The motion data is data relating to the motion amount of the lateral sealing device 30 during the sandwiching motion. The amount of operation here is the amount of operation of the servomotor 32 (the number of pulses acquired by the encoder 32a). The trapping of the article A in the laterally sealed region S2 (hereinafter simply referred to as “biteing”) means that the pair of sealing jaws 31 sandwich the film F with the article A interposed therebetween when forming the laterally sealed region S2. This means that a laterally sealed region S2 in which the article A is interposed between the films F is formed.

The memory 52 stores information such as parameters used to determine the presence or absence of jamming. The parameters used to determine the presence or absence of entrapment include a threshold for determining the presence or absence of entrapment, a predetermined correction value for correcting the threshold, a condition for applying the correction value (the condition of the bag making and packaging machine 10 a predetermined number of seconds elapsed after the operation was interrupted, and a predetermined number of bags after the operation was restarted after the operation was interrupted). These parameters can be set and adjusted by an operator's operation via the display unit 13, which will be described later.

As an example, the operation data is expressed as a relative pulse number (relative value) based on a reference pulse number, which is the pulse number of the encoder 32a when there is no jamming. The relative pulse number is calculated, for example, by subtracting the pulse number detected by the encoder 32a from the reference pulse number. More specifically, the relative pulse number is calculated by subtracting the pulse number detected by the encoder 32a at the maximum torque from the reference pulse number. In this case, the fact that the relative pulse number is a positive value means that the lateral seal region S2 is thicker than the thickness (reference thickness) in the facing direction of the lateral seal region S2 when there is no entrapment. That is, the control unit 50 functions as an operation data acquisition unit together with the encoder 32a.

The control unit 50 determines the presence or absence of entrapment based on the relative number of pulses. The control unit 50 determines that there is entrapment when the relative pulse number is equal to or greater than the threshold. The threshold value is a judgment value for judging presence/absence of entrapment based on the relative number of pulses.

As an example, the threshold is expressed as a relative threshold (relative value) based on the reference pulse number. The relative threshold value is, for example, a relative pulse number based on the reference pulse number, and is a predetermined relative pulse number that takes into consideration variations in the thickness of the lateral seal region S2.

When the operation of the bag making and packaging machine 10 is restarted after being interrupted (after the operation is interrupted), the control unit 50 sets the threshold to be higher than before the operation is interrupted. When the operation is restarted after the operation is interrupted, the already formed vertical seal area S1 is cooled, so that the vertical seal area S1 becomes harder than before the operation is interrupted, and the lateral seal area S2 is pinched. The amount of movement changes during operation. Therefore, when the operation of the bag making and packaging machine 10 is resumed after the operation is interrupted, the control unit 50 uses a threshold corresponding to the hardness of the vertical seal area S1 compared to before the operation is interrupted.

Specifically, when a predetermined number of elapsed seconds (for example, 5 seconds) have elapsed after the suspension of operation and the operation is restarted, the control unit 50 sets the threshold to be larger than before the suspension of operation. do. The predetermined number of elapsed seconds is the time from the suspension of the operation of the bag-making and packaging machine 10 for the already formed vertical seal region S1 to cool down and harden beyond a certain level. The predetermined number of elapsed seconds can be adjusted by an operator's adjustment operation received by the display unit 13 .

The control unit 50 sets the threshold higher than before the suspension of operation until the bag making and packaging machine 10 manufactures a predetermined number of bags B (for example, 3 bags) after the operation is resumed after the suspension of operation. The predetermined number of bags is the number of bags B manufactured by the bag making and packaging machine 10 after operation is restarted, and the vertical seal area S1 already formed at the time of interruption of operation remains cold and hard even after restart of operation. It is the number of bags B left. A predetermined time may be used instead of the predetermined number of bags. The predetermined number of bags can be adjusted by an operator's adjustment operation received by the display unit 13 .

When the operation is restarted after the operation is interrupted, the control unit 50 sets the threshold value to be larger than that before the operation is interrupted by a predetermined correction value (for example, 500 pulses). The predetermined correction value is a correction value for the determination value for suppressing an erroneous determination of entrapment that may occur due to the vertical seal area S1 being cooled and hardened. The predetermined correction value is the difference between the relative number of pulses at the maximum torque when the longitudinal seal region S1 is cold and hardened and the relative number of pulses at the maximum torque when the longitudinal seal region S1 is warm. Equivalent to. The predetermined correction value can be adjusted by an operator's adjustment operation received by the display unit 13 .

The display unit 13 is a display device having both a display function and an input function, such as a touch panel. The display unit 13 displays the result of determination of presence or absence of jamming, etc., and also displays an operation screen for setting various parameters related to the bag-making operation of the bag making and packaging machine 10 and determination of presence or absence of jamming.

The display unit 13 functions as a threshold value acquisition unit that acquires a threshold value, and also functions as an operation unit that receives an operator's adjustment operation of each parameter related to the determination of the presence or absence of engagement. Specifically, the display unit 13 receives at least one setting operation and adjustment operation by the operator of a predetermined threshold value, a predetermined correction value, a predetermined number of elapsed seconds, and a predetermined number of bags. The setting operation and the adjustment operation may be accepted by the operator operating an operation button such as a numeric keypad called by touching a predetermined area of the display unit 13, for example. The display unit 13 transmits information regarding each parameter set by the operator to the control unit 50 .

The display unit 13 displays the relationship between the relative number of pulses for each production of the bag B and the threshold in a time-series graph. Examples of graphs displayed by the display unit 13 will be described with reference to FIGS. 5 and 6. FIG. In FIGS. 5 and 6, the order of the manufactured bags B is shown on the horizontal axis. The order of the manufactured bags B is a mode in which the plots for each manufactured bag B are arranged in chronological order so that the plots for each manufactured bag B become new from the negative direction to the positive direction of the horizontal axis. means. 5 and 6, the vertical axis indicates the relative pulse number and the threshold value, and the value "0" on the vertical axis corresponds to the reference pulse number. The number of bags on the horizontal axis other than "0," "25," and "50" are shown for convenience of explanation. Only “25” and “50” are displayed on the display section 13 .

As shown in FIG. 5, the display unit 13 displays the relative number of pulses for each production of the bag B in a line graph. In the example of FIG. 5, adjacent plots among a plurality of plots representing the relative number of pulses for each production of the bag B are connected to each other to form a broken line L1. The relative number of pulses in each plot corresponds to the operation amount of the servomotor 32 at the time of the above maximum torque for each production of bag B. FIG.

The display unit 13 displays the threshold for each production of the bag B in a line graph. In the example of FIG. 5 , the polygonal line L2 is formed by connecting adjacent plots among a plurality of plots representing the threshold value for each production of the bag B. In the example of FIG. The threshold value in each plot corresponds to the threshold value for each production of the bag B used when the control unit 50 determines whether or not the bag B is caught.

The display unit 13 displays the polygonal lines L1 and L2 respectively indicating the relative number of pulses and the threshold for each production of the bag B, with the line types of the polygonal lines L1 and L2 different from each other. In the example of FIG. 5, the polygonal line L1 representing the relative pulse number is displayed with a thick solid line, and the polygonal line L2 representing the threshold is displayed with a thin solid line. That is, the display unit 13 displays the polygonal lines L1 and L2 with different line thicknesses as the line types of the polygonal lines L1 and L2.

The display unit 13 functions as an operation unit that receives a threshold adjustment operation by an operator. The display unit 13 has an area 13a for displaying the threshold. In the example of FIG. 5, the area 13a displays that the threshold is 700 pulses. The adjustment operation is accepted, for example, by the operator operating an operation button (not shown) such as a numeric keypad that is called by the operator touching the area 13a.

The display unit 13 functions as an operation unit that receives an operator's adjustment operation for a predetermined number of elapsed seconds. The display unit 13 has an area 13b for displaying a predetermined number of elapsed seconds. In the example of FIG. 5, the area 13b displays that the predetermined number of elapsed seconds is 5 seconds. The adjustment operation is accepted, for example, by the operator operating an operation button (not shown) such as a numeric keypad that is called by the operator touching the area 13b.

The display unit 13 functions as an operation unit that receives an operator's adjustment operation for a predetermined number of bags after operation is restarted. The display unit 13 has an area 13c for displaying a predetermined number of bags. In the example of FIG. 5, the area 13c displays that the predetermined number of bags is three. The adjustment operation is accepted, for example, by the operator operating an operation button (not shown) such as a numeric keypad that is called by the operator touching the area 13c.

The display unit 13 functions as an operation unit that receives an operation for adjusting a predetermined correction value. The display unit 13 has an area 13d for displaying a predetermined correction value. In the example of FIG. 5, the area 13d displays that the predetermined correction value is 1500 pulses. The adjustment operation is accepted, for example, by the operator operating an operation button (not shown) such as a numeric keypad called by touching the area 13d.

As an example, the operation of the bag-making and packaging machine 10 and the display on the display unit 13 when the operation of the bag-making and packaging machine 10 is restarted after being interrupted will be described. As shown in FIG. 5, first, the operation of the bag making and packaging machine 10, which had been in steady operation with the threshold value set to 700 pulses, was interrupted after manufacturing bags B with the number of bags on the horizontal axis being "10". ing. After that, when the operation is restarted, the bag making and packaging machine 10 produces bags B with the number of bags on the horizontal axis being "11" in a state in which a predetermined correction value is added and the threshold is set to 2200 pulses. there is After that, the bag making and packaging machine 10 manufactures three bags B, which is the predetermined number of bags after restarting the operation. That is, after the bag B with the number of bags on the horizontal axis being "13" with the threshold set to 2200 pulses is produced by the bag making and packaging machine 10, the threshold is returned to the state set to 700 pulses. With the threshold set to 700 pulses, the bag making and packaging machine 10 has manufactured up to the bag B with the number of bags on the horizontal axis being "18".

In this case, in the example of FIG. 5, among a plurality of plots representing the relative number of pulses and threshold values for each production of bag B, adjacent plots are connected to form polygonal lines L1 and L2. is displayed on the display unit 13 . Note that when the operation of the bag making and packaging machine 10 is interrupted (the number of bags on the horizontal axis is between "10" and "11"), adjacent plots may not be connected to each other.

Further, following FIG. 5, the display unit 13 accepts the adjustment operation of the threshold value and the predetermined correction value by the operator, and the bag making and packaging machine 10 when the operation is restarted after the operation of the bag making and packaging machine 10 is interrupted again. 10 and the display of the display unit 13 will be described. As shown in FIG. 6, the operation of the bag making and packaging machine 10 is suspended after manufacturing the bags B with the number of bags on the horizontal axis being "18". Thereafter, the threshold is adjusted from 700 pulses in the case of FIG. 5 to 300 pulses by the operator's adjustment operation of the threshold, and the effect is displayed in the area 13a. Further, the predetermined correction value is adjusted from 1500 pulses in the case of FIG. 5 to 500 pulses by the operator's adjustment operation of the predetermined correction value, and the effect is displayed in the area 13d.

In the example of FIG. 6, the operation of the bag making and packaging machine 10 is restarted after the operator has adjusted the threshold value and the predetermined correction value. When the operation is restarted, the bag making and packaging machine 10 manufactures bags B with the number of bags on the horizontal axis being "19" with the threshold set to 800 pulses by adding a predetermined correction value. After that, the bag making and packaging machine 10 manufactures three bags B, which is the predetermined number of bags after restarting the operation. That is, after three bags B with the number of bags on the horizontal axis up to "21" being manufactured by the bag making and packaging machine 10 with the threshold set to 800 pulses, the threshold is set to 300 pulses. returned. With the threshold set to 300 pulses, the bag making and packaging machine 10 has manufactured up to the bag B with the number of bags on the horizontal axis being "31".

In this case, in the example of FIG. 6, among a plurality of plots representing the relative number of pulses and threshold values for each production of the bag B, adjacent plots are connected to form a new polygonal line following the polygonal lines L1 and L2 of FIG. L1 and L2 are formed after the number of bags on the horizontal axis is "19", and the polygonal lines L1 and L2 are displayed on the display unit 13. FIG. Note that when the operation of the bag making and packaging machine 10 is suspended (the number of bags on the horizontal axis is between "18" and "19"), adjacent plots may not be connected to each other.

In the example of FIG. 6, the scale (range) of the vertical axis is automatically adjusted as the operator adjusts the threshold value and the predetermined correction value. In addition, the display unit 13 can change at least one of the range of the horizontal axis and the range of the vertical axis in the graph by an operator's touch operation on the display unit 13 . For example, the swipe operation of the display unit 13 by the operator may change the range of the horizontal axis or the range of the vertical axis in the graph. For example, the operator may perform a pinch operation on the display unit 13 to change the range of the horizontal axis and the range of the vertical axis in the graph.

As described above, in the bag making and packaging machine 10, the relationship between the relative number of pulses (operation data) for each production of the bag B and the threshold value is displayed in a time-series graph. Therefore, the validity of the threshold value can be intuitively recognized more easily than when the relationship between the momentary relative pulse number and the threshold value is continuously displayed. As a result, it is possible to efficiently adjust the threshold for determining whether or not the article A is caught in the laterally sealed area S2.

In the bag making and packaging machine 10, the display unit 13 functioning as a threshold acquisition unit also functions as an operation unit that receives a threshold adjustment operation by the operator. As a result, the operator can intuitively recognize the appropriateness of the threshold value from the display of the graph on the display unit 13 and efficiently adjust the threshold value via the display unit 13 .

In the bag making and packaging machine 10, the relative pulse number and the threshold value are expressed as a relative pulse number based on a reference pulse number, which is the pulse number when the article A is not caught in the lateral sealing area S2. As a result, the relationship between the relative number of pulses and the threshold is displayed with reference to the reference number of pulses, so that the validity of the threshold can be more intuitively recognized.

In the bag making and packaging machine 10 , the horizontal sealing device 30 has a pair of sealing jaws 31 that sandwich the film F and a servomotor 32 that drives the sealing jaws 31 . An encoder 32a that detects the amount of motion of the servomotor 32 functions as a motion data acquisition unit. The unit of operation data is the number of pulses of the encoder 32a. In this way, the number of pulses from the encoder 32a is used as operation data without being converted into other data. Errors can be suppressed.

In the bag making and packaging machine 10, the display unit 13 displays the relative number of pulses for each production of the bag B in a line graph. As a result, the visibility is improved, for example, compared to the case where the relative number of pulses for each production of the bag B is displayed by dots (plots).

In the form-fill-seal machine 10, the display unit 13 displays the polygonal lines indicating the relative number of pulses and the threshold value for each production of the bag B, with at least one of the colors and line types of the polygonal lines being different from each other. As a result, the visibility is improved compared to, for example, the case of displaying polygonal lines with the same color and line type.

The bag making and packaging machine 10 displays a graph in which the order of the manufactured bags B is shown on the horizontal axis and the relative pulse number and threshold value are shown on the vertical axis. As a result, the order of manufactured bags B is displayed in a time-series graph, so that the graph can be more easily recognized.

In the bag making and packaging machine 10, the display unit 13 is a touch panel that can change at least one of the range of the horizontal axis and the range of the vertical axis in the graph by touch operation. As a result, the range of the horizontal axis and the range of the vertical axis can be easily changed, so that the work of adjusting the threshold value becomes more efficient.

The invention is not limited to the above embodiments.

In the above-described embodiment, in the examples of FIGS. 5 and 6, the display unit 13 displays the polygonal lines indicating the operation data and the threshold value for each production of the bag B with different line types (line thicknesses). Although they are displayed, the polygonal lines may be displayed in different colors. For example, in FIG. 7, the relationship between the relative number of pulses for each production of the bag B and the threshold when the bag making and packaging machine 10 is operated following FIG. is displayed on the display unit 13 as a graph of . In the example of FIG. 7, the broken line indicating the relative number of pulses for each production of bag B is displayed as a solid black line. A polygonal line indicating the threshold for each production of the bag B is displayed, for example, as an orange solid line. That is, the polygonal line indicating the relative number of pulses for each production of bag B and the polygonal line indicating the threshold value for each production of bag B are displayed in different colors. In addition, in FIG. 7, a hatched solid line is displayed for the sake of convenience to show that the polygonal line indicating the threshold value is an orange solid line. In addition, the display unit 13 may display polygonal lines with different colors and line types. In short, the display unit 13 may display polygonal lines with different colors and/or line types.

In the examples of FIGS. 5 and 6, the display unit 13 displays the plots adjacent to each other among the plurality of plots representing the relative number of pulses and the threshold value for each production of the bag B as polygonal lines L1 and L2 formed by connecting them. , but not limited to. For example, as shown in FIG. 7, the relative number of pulses and threshold value for each production of the bag B may be displayed by a stepped line (polygonal lines L3 and L4 in FIG. 7) as one aspect of the polygonal line. .

5 to 7, when the operation of the bag making and packaging machine 10 is interrupted (for example, in FIG. 5, the number of bags on the horizontal axis is between "10" and "11"; The number of bags on the horizontal axis is between "18" and "19", and in FIG. 7, the number of bags on the horizontal axis is between "14" and "15" and between "22" and "23". ) shows an example in which adjacent plots are not connected to each other and each polygonal line is displayed discontinuously, but the present invention is not limited to this. For example, as shown in FIG. 8, the display unit 13 displays the display when the operation of the bag making and packaging machine 10 is interrupted (when the number of bags on the horizontal axis is between "14" and "15" and between "22" and "23"). ), adjacent plots may be displayed as continuous polygonal lines L5 and L6 formed by connecting each other.

In the above embodiment, the number of pulses acquired by the encoder 32a is exemplified as the amount of operation during the pinching operation, and the number of relative pulses is exemplified as operation data, but the present invention is not limited to this. For example, the number of pulses acquired by the encoder 32a may be used as the operation data. As the operation data, the distance between the pair of sealing jaws 31 in the facing direction, the thickness of the formed lateral sealing region S2 in the facing direction, and the like may be used.

In the above embodiment, the predetermined threshold value, the predetermined correction value, the predetermined number of elapsed seconds, and the predetermined number of bags are input by the operator through the setting operation and adjustment operation via the display unit 13. A predetermined threshold value, a predetermined correction value, a predetermined number of elapsed seconds, and a predetermined number of bags stored in the memory may be read out. Further, the operation unit is not limited to the display unit 13, and may be an input device such as a keyboard.

In the above-described embodiment, the bag-making and packaging machine 10 is configured as an intermittent bag-making and packaging machine in which the laterally sealed area S2 is formed when the film F is stopped. A continuous form-fill-seal machine in which the laterally sealed area S2 is formed while the film F is fed may be used.

Although the packaging system 1 including the combination weighing device 100 has been described as an example in the above embodiment, the combination weighing device 100 is not necessarily required. The supply of the articles A to the bag making and packaging machine 10 does not necessarily have to use the combination weighing device 100, and may be, for example, a conveyor.

DESCRIPTION OF SYMBOLS 10... Bag making packaging machine, 13... Display part (display part, operation part, threshold value acquisition part), 30... Horizontal sealing device (sealing part), 31... Seal jaw, 32... Servo motor, 32a... Encoder (operation data acquisition section), 50... control section (operation data acquisition section, threshold acquisition section), A... article, B... bag, F... film, S2... lateral seal area (seal area).

Claims (8)

A bag making and packaging machine for manufacturing a bag containing an article,
a sealing portion sandwiching the formed film and forming a sealing region;
an operation data acquisition unit that acquires operation data relating to an amount of operation of the sealing portion during the clamping operation;
a threshold value obtaining unit for obtaining a threshold value for determining whether or not the article is caught in the sealing area based on the motion data;
a display unit that displays the relationship between the operation data for each production of the bag and the threshold in a time-series graph,
The display unit displays the relationship between the operation data for each production of the bag before the interruption of the operation and the threshold value as the time-series graph after the interruption of the operation of the bag making and packaging machine and the restart of the operation. , the relationship between the operation data for each production of the bag after the restart of operation and the threshold after the restart, which is greater than the threshold before the interruption of the operation , is adjacent to each other through the interruption of the operation; display to match ,
the display of the thresholds for each bag production comprises a plot of the thresholds for each of the bags produced;
The form-fill-seal machine , wherein the threshold acquisition unit is an operation unit that receives an operation for adjusting the threshold by an operator . 2. The bag making and packaging machine according to claim 1 , wherein said motion data and said threshold value are expressed as relative values based on said motion amount when said article is not caught in said sealing area. The sealing portion has a pair of sealing jaws that sandwich the film and a servo motor that drives the sealing jaws,
The motion data acquisition unit is an encoder that detects a motion amount of the servomotor,
3. The bag making and packaging machine according to claim 1 , wherein the unit of said operation data is the number of pulses of said encoder. The bag making and packaging machine according to any one of claims 1 to 3 , wherein said display unit displays said operation data for each production of said bag in a line graph. 5. The bag making and packaging according to claim 4 , wherein the display unit displays the polygonal lines respectively indicating the operation data and the threshold value for each production of the bag, with at least one of colors and line types of the polygonal lines being different from each other. machine. The display unit includes, as the line graph, a plot representing the relationship between the operation data for each production of the bag before the suspension of operation and the threshold value, and the bag adjacent to the plot and after the resumption of operation. 6. The form-fill-seal machine according to claim 4 , wherein the plots representing the relationship between said operation data and said threshold value for each manufacture of said product are displayed discontinuously without being connected to each other. The bag making and packaging according to any one of claims 1 to 6 , wherein the display unit displays the graph showing the order of the manufactured bags on the horizontal axis and the operation data and the threshold value on the vertical axis. machine. The bag making and packaging machine according to any one of claims 1 to 7 , wherein said display unit is a touch panel in which at least one of the range of the horizontal axis and the range of the vertical axis in said graph can be changed by touch operation.

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