JP4557298B2 - Vertical bag making and packaging machine - Google Patents

Vertical bag making and packaging machine Download PDF

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Publication number
JP4557298B2
JP4557298B2 JP2001194161A JP2001194161A JP4557298B2 JP 4557298 B2 JP4557298 B2 JP 4557298B2 JP 2001194161 A JP2001194161 A JP 2001194161A JP 2001194161 A JP2001194161 A JP 2001194161A JP 4557298 B2 JP4557298 B2 JP 4557298B2
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Japan
Prior art keywords
bag making
packaging machine
processing
control unit
packaging
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JP2001194161A
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JP2003011927A (en
Inventor
幸夫 中川
靖 山口
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株式会社イシダ
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/10Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
    • B65B9/20Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles
    • B65B9/2014Tube advancing means
    • B65B9/2028Rollers or belts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10Applying or generating heat or pressure or combinations thereof
    • B65B51/26Devices specially adapted for producing transverse or longitudinal seams in webs or tubes
    • B65B51/30Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes
    • B65B51/306Counter-rotating devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B57/00Automatic control, checking, warning, or safety devices
    • B65B57/10Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of articles or materials to be packaged
    • B65B57/12Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of articles or materials to be packaged and operating to control, or stop, the feed of wrapping materials, containers, or packages
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B57/00Automatic control, checking, warning, or safety devices
    • B65B57/10Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of articles or materials to be packaged
    • B65B57/14Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of articles or materials to be packaged and operating to control, or stop, the feed of articles or material to be packaged
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B57/00Automatic control, checking, warning, or safety devices
    • B65B57/18Automatic control, checking, warning, or safety devices causing operation of audible or visible alarm signals
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/10Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
    • B65B9/20Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles
    • B65B9/207Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles the web advancing continuously

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vertical bag making and packaging machine, and more particularly to a bag making and packaging machine for packaging a falling mass.
[0002]
[Prior art]
There are many products such as confectionery, fruits and vegetables, prepared dishes, processed foods, etc. that are packaged and distributed and sold in a specified weight or quantity. Generally, it is packaged by a packaging machine. Such a product weighing and bagging system is mainly composed of a weighing machine that performs combination weighing so that the product has a set weight or quantity, and a film is made into a predetermined amount by bag making. It consists of a bag making and packaging machine for bagging products.
[0003]
FIG. 1 shows an example of this weighing / bag-making packaging system and an apparatus in the preceding and following processes. Here, the product is first conveyed above the weighing machine 110 by the supply conveyor device 101. Next, the product is placed on the dispersion feeder 111 and is dispersed radially by the vibration of the dispersion feeder 111. When a plurality of products are sent to the pool hoppers 113 arranged circumferentially via the radiation troughs 112 following the dispersion feeder 111, the products are temporarily pooled there, and then the products are positioned below each pool hopper 113. The weighing hopper 114 is loaded. The weight of the product put into the weighing hopper 114 is measured by a load cell (weight detector) provided for each weighing hopper 114. Then, based on the measured weight of the product in each weighing hopper 114, a combination operation is performed to determine from which weighing hopper 114 the product or weight is within the allowable range, and based on the result, how many of the weighing hoppers 114 are obtained. The product is discharged to the collective discharge chute 115.
[0004]
On the other hand, the bag making and packaging machine 120 disposed below the weighing machine 110 is an apparatus that fills and packs the products discharged from the weighing machine 110 into the bags while manufacturing the bags. A main configuration of the bag making and packaging machine 120 is shown in FIG. This configuration is what is called a vertical pillow packaging machine. In this bag making and packaging machine 120, first, a sheet-like film 90 drawn out from a film roll 128 (see FIG. 1) is formed into a cylindrical shape by a tube 121 and a former 122, and is sent downward by a pull-down belt mechanism 123. The vertical edges on which the film-like films 90 a are stacked are heat sealed (heat sealed) by the vertical sealing mechanism 124. When the weighed product passes through the tube 121 and is filled into the cylindrical film 90a, the horizontal seal mechanism 125 disposed below the tube 121 spans the upper part of the preceding bag and the lower part of the subsequent bag. A horizontal seal is performed, and the center of the horizontal seal portion is cut by a cutter built in the horizontal seal mechanism 125.
[0005]
The bag 90b packed with the product in this way is placed on the transport conveyor 130 by the tilt guide plate 129 and transported to the weight checker 140 and the seal checker (not shown) in the subsequent process.
[0006]
[Problems to be solved by the invention]
In the bag making and packaging machine as described above, it is important to prevent the article from being caught in the sealed portion when performing the lateral sealing of the bag. If the article bites into the seal portion, it will be discarded as a seal failure, and production efficiency will deteriorate. In addition, when a seal failure frequently occurs, a situation where the production line must be stopped also occurs. For this reason, conventionally, the operator who operates the weighing machine and the bag making and packaging machine has determined the timing of discharging the article from the weighing machine and the bag making based on the state of the seal failure and the data provided by the bag making and packaging machine. The cycle time of the packaging machine is adjusted manually. In addition, as disclosed in Japanese Patent Laid-Open No. 10-77702, discharge (falling) of an article from a weighing machine is detected by a detection means, and the operation of the horizontal seal is automatically adjusted.
[0007]
However, depending on the article to be packaged and packaged, these adjustments may not function effectively. For example, when bag-like packaging such as potato chips is made at high speed, the gap distance between the previously falling article and the following article is set to a dimension that prevents the article from being bitten during lateral sealing. However, the gap distance may become smaller than the limit during operation due to factors such as changes in humidity and changes in the thickness and size of each chip. In such a case, although the deterioration of the seal defect rate is detected from the inspection results of the seal checker included in the seal checker or the horizontal seal mechanism, it is difficult to take appropriate measures unless it is an experienced operator. In particular, it takes considerable experience to determine whether the article drop timing is bad or whether the cycle time of the bag making and packaging machine is too short. When the gap distance is steadily shortening due to the above factors, it is necessary to adjust the cycle time of the bag making and packaging machine, but in the past, the state depends on the adjustment operation of a skilled operator.
[0008]
It is an object of the present invention to enable an operator to quickly take appropriate measures when an article is in a state of being bitten into a seal portion, and to automatically avoid a state in which an article is bitten into a seal portion. Is to provide a simple bag making and packaging machine.
[0009]
[Means for Solving the Problems]
A vertical bag making and packaging machine according to claim 1 is an apparatus for packaging a falling lump-shaped article, and includes a detection unit and a comparison unit. The detection means detects the leading end of the falling of the massive article and the trailing end of the dropping of the massive article. The comparison means obtains the gap distance between the end of the preceding massive article falling and the leading edge of the subsequent massive article dropping based on the detection result of the detection means. Then, the comparison means compares the obtained gap distance with a predetermined value.
[0010]
Here, since the detection means detects the leading edge and the trailing edge of the massive article, the gap distance between the massive articles falling continuously can be obtained. And after calculating | requiring the clearance gap, it is made to compare with a predetermined value by a comparison means.
For this reason, it becomes possible to determine whether or not biting into the packaging part of the massive article can be made from the comparison result, and when the biting is concerned, a warning is given to the operator or control is performed to widen the gap distance. It becomes possible. If the warning is issued to the operator, the operator can quickly notice the risk of defective packaging and take appropriate measures, and if the control is performed to widen the gap distance, the package bites the article. Containment is suppressed.
[0011]
The detection means is not only a type that directly detects the passage of a massive article such as a photoelectric sensor, but is also attached to a member that contacts the massive article and indirectly detects the leading and trailing ends of the massive article. A vibration sensor or the like can also be used.
A vertical bag making and packaging machine according to claim 2 is the vertical bag making and packaging machine according to claim 1, further comprising a control unit. A control part transmits a control signal with respect to the processing apparatus of a previous process based on the comparison result of a comparison means.
[0012]
Here, a control unit that performs control based on the comparison result of the comparison unit is provided, and the control unit is configured to transmit a control signal to the processing device in the previous process of the vertical bag making and packaging machine. ing. Thereby, when the surrounding environment such as humidity or the state of the article is changed and the gap dimension between the massive articles is steadily shortened, it is possible to control the pre-processing apparatus such as a weighing machine. Thus, it becomes possible to change the receiving pitch of receiving articles that cannot be solved only by the control in the vertical bag making and packaging machine.
[0013]
The vertical bag-making packaging machine according to claim 3 is the vertical bag-making packaging machine according to claim 2, wherein the control unit is a pre-processing device when the gap distance is smaller than a predetermined lower limit value. A control signal is transmitted to slow down the processing speed of the processing device.
If the gap distance becomes smaller, bag-making defects due to the biting of articles frequently occur and the actual operation rate of the production line decreases.Therefore, a predetermined lower limit value is set here, and the gap distance becomes smaller than the predetermined lower limit value. A control signal is issued to slow down the processing speed of the previous process. Although the number of bags produced by the bag making and packaging machine decreases as the processing speed of the previous process decreases, the percentage of bag making defects is reduced, so the actual operation rate as a production line is improved.
[0014]
The vertical bag making and packaging machine according to claim 4 is the vertical bag making and packaging machine according to claim 3, wherein the control unit is a processing device for a previous process when the gap distance is larger than a predetermined upper limit value. A control signal is transmitted to increase the processing speed of the processing apparatus and the processing speed of the vertical bag making and packaging machine.
When the gap distance is larger than necessary, it is possible to maintain a good bag-making defect rate due to the biting of articles even if the bag-making speed of the vertical bag-making packaging machine is increased. In view of this, here, when the gap distance is larger than the predetermined upper limit value, the processing speed of the processing device in the previous process and the processing speed of the vertical bag making and packaging machine are increased to improve the overall processing capacity. ing.
[0015]
The vertical bag making and packaging machine according to claim 5 is an apparatus that performs packaging by sealing the upper and lower ends of the bag in a state in which the falling bulk article is in the cylindrical bag that has been made. Thus, the detection means and the control unit are provided. The detection means detects the falling of the massive article from the processing apparatus in the previous process. The control unit automatically adjusts the cycle time of the bag-making packaging based on the detection result of the detection means so as to suppress the biting of the massive article into the sealed portion of the package. The cycle time means a predetermined time from bag making and packaging of a certain bag to bag making and packaging of the next bag, that is, a predetermined time taken for bag making and packaging of one bag.
[0016]
Conventionally, it has been performed to detect the fall of a lump article and finely adjust the bag making operation of bag making packaging or to adjust the discharge timing of the article by the processing device in the previous process. The control which assumed the change of the fall state of is not performed.
On the other hand, in the vertical bag making and packaging machine according to the present claim, the detection result of the detection means assuming a steady change in the falling state of the article based on an environmental state such as humidity or a change in the state of the article. The automatic adjustment of the cycle time of bag making and packaging is carried out.
[0017]
For this reason, the operation of the operator who has adjusted the cycle time based on experience from the increase in the defect rate is automatically and more appropriately performed. As a result, the state in which the article is caught in the seal portion is automatically avoided, and the burden on the operator is reduced. In addition, bag production defects are reduced and the actual operation rate of the production line is improved.
[0018]
The vertical bag making and packaging machine according to claim 6 is the vertical bag making and packaging machine according to claim 5, wherein the detecting means detects the leading end of the falling of the massive article and the trailing end of the dropping of the massive article. To do. Further, the control unit obtains a gap distance between the end of the preceding massive article dropping and the leading end of the subsequent massive article dropping based on the detection result of the detecting means. When the control unit determines that the gap distance is too short, the control unit increases the cycle time of bag making and packaging and transmits a control signal to the processing device in the previous process to reduce the processing speed of the processing device. Let
[0019]
Here, we focus on the fact that the gap distance between the massive articles changes constantly even if the cycle time does not change due to the change in the steady fall state of the article based on the environmental condition such as humidity and the change in the article condition. ing.
Specifically, the gap distance between the bulky articles that has a great influence on the presence or absence of the biting of the article into the bag-making part is obtained from the detection result of the detection means, and it is too small and the possibility of biting is large. Sometimes, the cycle time of bag making packaging is lengthened and the processing speed of the processing device in the previous process is reduced. Thereby, although the quantity of the bags which a bag making packaging machine makes decreases, the ratio of the bag making defect by biting of articles | goods becomes small, and the actual operation rate as a production line improves.
[0020]
The vertical bag making and packaging machine according to claim 7 is the vertical bag making and packaging machine according to claim 6, wherein the control unit determines that the gap distance is excessive, and the bag making and packaging cycle is performed. In addition to shortening the time, a control signal is transmitted to the processing apparatus in the previous process to increase the processing speed of the processing apparatus.
Here again, we focus on the fact that the gap distance between the massive articles changes constantly even if the cycle time does not change due to the change in the steady state of the article due to changes in the environmental condition such as humidity and the condition of the article. ing.
[0021]
Specifically, when the gap distance between the massive articles obtained from the detection result of the detection means becomes excessive, the processing speed of the processing device of the previous process is increased while shortening the cycle time, and the bag making packaging machine creates Increasing the number of bags per hour.
A vertical bag making and packaging machine according to claim 8 is the vertical bag making and packaging machine according to any one of claims 4, 6, and 7, wherein the control unit is configured to provide a gap distance and a predetermined lower limit value or a predetermined upper limit value. Based on a plurality of comparisons, it is determined whether the gap distance is too small or too large.
[0022]
In order to appropriately determine whether the gap distance between massive articles has changed temporarily or has changed constantly, there is a method of setting a lower limit value and an upper limit value that are suitable for this, but here a plurality of times Based on this comparison, a method of determining whether the gap distance is too small or too large is employed.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
<Overall configuration>
FIG. 3 shows a schematic configuration of a vertical bag making and packaging machine 20 according to an embodiment of the present invention. This vertical bag making and packaging machine 20 is a device for bagging articles such as food (here, potato chips), and mainly a bag making and packaging unit 20a (see FIG. 4), which is a main body for bagging products. ), A film supply unit 20b (see FIG. 4) for supplying the film 90 to be a bag to the bag making and packaging unit, and a control unit 30 (see FIG. 4).
[0024]
<Configuration of film supply unit>
The film supply part 20b supplies the sheet-like film 90 to the tube 21 and the former 22 of the bag making and packaging part 20a described later. A roll around which the film 90 is wound is set in the film supply unit 20b, and the film 90 is fed out from the roll.
[0025]
<Configuration of bag making and packaging unit>
The bag making and packaging unit 20 a mainly includes a film forming mechanism including a tube 21 and a former 22, a pull-down belt mechanism 23, a vertical seal mechanism 24, a horizontal seal mechanism 25, and a discharge guide plate 29.
The tube 21 is a cylindrical member, and the upper and lower ends are open. The tube 21 is integrated with the former 22 via a bracket. The weighed potato chips are put into the opening at the upper end of the tube 21 from the weighing machine 110. The former 22 is disposed so as to surround the tube 21. The shape of the former 22 is such that the sheet-like film 90 sent from the film supply unit is formed into a cylindrical shape when passing between the tube 21 and the former 22.
[0026]
The pull-down belt mechanism 23 is a mechanism that sucks and transports the film 90 wound around the tube 21 downward, and mainly includes a driving roller and a driven roller, and a belt having a sucking function.
The vertical sealing mechanism 24 is a mechanism that heats the overlapping portion of the film 90 wound around the tube 21 while pressing the overlapping portion of the film 90 against the tube 21 with a constant applied pressure. The vertical sealing mechanism 24 includes a heater, a heater belt that is heated by the heater and contacts an overlapping portion of the film 90, and the like.
[0027]
The horizontal sealing mechanism 25 is disposed below the forming mechanism, the pull-down belt mechanism 23, and the vertical sealing mechanism 24. The horizontal sealing mechanism 25 has a pair of symmetrical sealing jaws 25a. The two sealing jaws 25a turn in a D shape while drawing a trajectory T that is symmetrical to each other, and are pressed against each other when the cylindrical film 90a formed by the vertical sealing is laterally sealed. The horizontal seal mechanism 25 has a built-in cutter (not shown). The cutter separates the bag and the subsequent cylindrical film 90a at the center position of the seal portion by the seal jaw 25a.
[0028]
The horizontal sealing mechanism 25 presses the portion to be laterally sealed by sandwiching the tubular film 90a between the sealing jaws 25a. However, heat is required in addition to pressure in order to perform sealing. For this reason, in order to heat the contact surface of the seal jaw 25a which contacts the cylindrical film 90a, each seal jaw 25a has a built-in heater and a heating element.
[0029]
<Configuration of control unit>
The control unit 30 shown in FIG. 4 plays a role of controlling the operation of each drive portion of the vertical bag making and packaging machine 20 and controlling the discharge timing of articles from the weighing machine 110 in the previous process.
The control unit 30 includes a CPU 31, a ROM 32, a RAM 33, a display unit 34, an input unit 35, and the like connected to the CPU 31. The display unit 34 and the input unit 35 are arranged on the front surface of the vertical bag making and packaging machine 20.
[0030]
The control unit 30 is connected to a pull-down belt mechanism 23, a vertical sealing mechanism 24, a horizontal sealing mechanism 25, and a driving device for the film supply unit 20b, and a photoelectric sensor 27 is connected to the control unit 30. .
The photoelectric sensor 27 is disposed above the tube 121. Specifically, a transparent acrylic cylindrical member 26 is inserted between the discharge port of the collective discharge chute 115 of the weighing machine 110 located above the tube 121 and the tube 121. A pair of light emitting / receiving photoelectric sensors 27 are arranged so as to monitor articles passing through the member 26 (see FIG. 3). The photoelectric sensor 27 to the control unit 30 determines whether or not a block of potato chips falling from the collective discharge chute 115 of the weighing machine 110 into the tube 21 through the cylindrical member 26 blocks the photoelectric sensor 27. A signal is always transmitted.
[0031]
<Master control of bag making and packaging machine by control unit and slave control of weighing machine>
(Control outline)
The vertical bag making and packaging machine 20 of the present embodiment can perform bag making and packaging of several tens to hundreds of bags per minute. The control unit 30 calculates the cycle time required for bag making and packaging of one bag based on the set quantity per time, and the lower part of the tubular film 90a by the pull-down belt mechanism 23 is adjusted to match the cycle time. And the turning speed of the seal jaw 25a of the lateral seal mechanism 25 are controlled. In response to the cycle time, the control unit 30 issues a request signal for discharging the article to the control unit 130 of the weighing machine 110. Upon receiving this request signal, the control unit 130 of the weighing machine 110 performs a weighing and discharging operation to drop the block of potato chips into the vertical bag making and packaging machine 20 and controls the vertical bag making and packaging machine 20. A discharge completion signal is returned to the unit 30.
[0032]
(Automatic adjustment control of drop timing, etc.)
In addition, the control unit 30 acquires the timing at which the tip (front) of the massive potato chips group passes the position of the photoelectric sensor 27 from the photoelectric sensor 27, and based on the information, the falling timing and the lateral direction of the potato chips group. The timing for performing horizontal sealing by the sealing jaw 25a of the sealing mechanism 25 is automatically adjusted. When illustrated using FIG. 5, the control unit 30 recognizes the timing when the tips of the potato chips 71 a and 72 a at the head of the massive potato chip groups 71 and 72 have passed the height position of the photoelectric sensor 27. become.
[0033]
(Automatic adjustment control of cycle time)
Further, here, in order to reduce the biting of the potato chips into the lateral seal portion of the bag 90b, the control unit 30 calculates the separation length L2 to help adjust the cycle time. As shown in FIG. 5, the separating length L2 is a vertical gap distance (interval) between the preceding block of potato chips 71 that are discharged from the weighing machine 110 and naturally fall, and the subsequent potato chips 72. More specifically, it is the gap distance between the potato chips 71b at the end of the fall of the preceding block of potato chips 71 and the potato chips 72a at the tip of the subsequent drop of the potato chips group 72. On the other hand, the length in the vertical direction of the massive potato chips group 71 is the charge length L1 shown in FIG.
[0034]
The separation length L2 becomes shorter as the charge length L1 becomes longer if the cycle time is the same. The charge length L1 varies depending on each cycle, and changes depending on the surrounding environment and changes in the situation in the manufacturing process of the potato chips. For example, when the humidity around the vertical bag making and packaging machine 20 increases, the so-called tailing becomes longer and the charge length L1 of the potato chips group tends to become longer. In addition, when the size of the potato as the raw material, the thickness of the slice, the seasoning attached to the surface of the potato chips, and the like change, the charge length L1 may also change constantly. For this reason, when the charge length L1 is changed, the control unit 30 performs control to optimize the separation length L2 by changing the discharge frequency from the weighing machine 110 by adjusting the cycle time.
[0035]
Specifically, the control unit 30 calculates the charge length L1 and the separation length L2 from the detection result from the photoelectric sensor 27, and compares the separation length L2 with a predetermined upper limit value and a predetermined lower limit value set in advance. I do.
When the separation length L2 becomes smaller than the predetermined lower limit value, the control unit 30 reduces the processing capacity by setting the cycle time to be longer, and controls the control unit 130 of the weighing machine 110 so as to match the cycle time. A signal for requesting the discharge of goods is issued. The request signal for article discharge to the control unit 130 has a low cycle frequency because the cycle time becomes long. In other words, the control unit 30 causes the control unit 130 of the weighing machine 110 to slow down the processing speed of the weighing machine 110 with a change in setting to increase the cycle time (reducing the number of potato chips group discharged per time). Command).
[0036]
In addition, when the separation length L2 becomes larger than the predetermined upper limit value in the average of a plurality of times, the control unit 30 changes the setting to shorten the cycle time (for example, the amount of bag making and packaging per minute is reduced). Change to increase 5 bags) to increase the processing speed of the film supply unit 20b and each of the mechanisms 23 to 25, and to the control unit 130 of the weighing machine 110 so as to meet the cycle time. Put out. The request signal for article discharge to the control unit 130 increases in frequency because the cycle time is shortened. In other words, the control unit 30 causes the control unit 130 of the weighing machine 110 to increase the processing speed of the weighing machine 110 along with the setting change that shortens the cycle time (the number of potato chips group discharged per time is increased). Command).
[0037]
It is desirable that the predetermined lower limit value and the predetermined upper limit value be set to such an extent that they are not broken by variations in the separation length L2 in each cycle.
<Characteristics of the vertical bag making and packaging machine of this embodiment>
Conventionally, it has been performed to finely adjust the bag-making operation of bag-making packaging or adjust the discharge timing of the article by the weighing machine in the previous process by detecting the fall of a lump-like article such as a group of potato chips with a sensor. However, the control which assumed the change of the fall state of the massive article which changes every moment is not performed.
[0038]
On the other hand, in the vertical bag making and packaging machine 20 according to the present embodiment, a change in the falling state of the article is detected in real time based on an environmental state such as humidity or a change in the state of the article, and the photoelectric sensor 27 detects the change. Based on the results, the cycle time of bag making and packaging is automatically adjusted.
Specifically, a separation length L2 that has a very large influence on whether or not an article is caught in the lateral seal portion is calculated, and when the separation length L2 is too small and the possibility of biting is large, the cycle time is increased. In addition, the processing speed of the weighing machine 110 in the previous process is reduced. As a result, the number of bags per time produced by the vertical bag making and packaging machine 20 is reduced, but the proportion of bag making defects due to biting of articles is reduced and the actual operation rate as a production line is improved.
[0039]
On the other hand, when the separation length L2 is larger than necessary, it is possible to satisfactorily maintain the bag making defective rate due to the bite of the articles even if the bag making speed of the vertical bag making and packaging machine 20 is increased. In view of this, when the separation length L2 becomes excessive, the processing speed of the weighing machine 110 is increased while the cycle time is shortened, and the number of bags per hour produced by the vertical bag making and packaging machine 20 is increased. Thereby, the processing capacity as a whole is improved.
[0040]
As described above, in the vertical bag making and packaging machine 20 of the present embodiment, even when the environmental conditions such as the state of potato chips and the humidity change and the charge length L1 and the separation length L2 change, the change is made accordingly. Since the separation length L2 is automatically adjusted appropriately, biting of articles into the lateral seal portion is suppressed, and as much bag-making packaging amount as possible is secured.
[0041]
[Other Embodiments]
(A)
In the above embodiment, the control unit 30 is configured to set the cycle time longer when the separation length L2 becomes smaller than the predetermined lower limit value. However, the variation in the separation length L2 in each cycle is reduced. Emphasis may be placed on the condition that the separation length L2 is continuously smaller than the lower limit value a plurality of times, or the condition that the average value of the separation length L2 of the recent predetermined number of times is lower than the lower limit value.
[0042]
(B)
In the above embodiment, the photoelectric sensor 27 is employed, but the vibration sensor may be fixed to the collective discharge chute 115, the cylindrical member 26, and the like that collide with the massive potato chips group. In this case, the control unit 30 analyzes the vibration waveform sent from the vibration sensor and detects the leading edge and the trailing edge of the potato chips group.
[0043]
(C)
In the above embodiment, the separation time L2 is compared with a predetermined value and the cycle time is automatically adjusted. However, the cycle time is automatically compared with the upper limit time and the lower limit time set as parameters of the separation time. It is also possible to adopt a configuration that allows adjustment.
[0044]
(D)
In the above embodiment, automatic adjustment control is performed to increase the cycle time when the separation length L2 falls below a predetermined lower limit value, but such automatic adjustment control is not performed, and a warning is simply issued to the operator. It is also possible to keep it alone. For example, it is conceivable that the operator displays the secular change of the separation length L2 or displays the screen so that the bite is carefully monitored. In addition, it is possible to actively display the screen regarding the setting change of the cycle time that seems to be necessary to prompt the operator to perform the operation. In this case, the operator can quickly recognize the risk of occurrence of a defect, and an operator with a low skill level can take an appropriate action.
[0045]
【The invention's effect】
In the present invention, since the gap distance between the massive articles falling continuously is obtained and compared with a predetermined value, it is possible to determine whether the massive articles are stuck in the packaging portion from the comparison result, In such a case, it is possible to issue a warning to the operator or perform control to increase the gap distance. If a warning is issued to the operator, the operator can quickly notice the risk of defective packaging and take appropriate measures. Biting is automatically suppressed.
[Brief description of the drawings]
FIG. 1 is a diagram showing an example of a weighing / bag-making packaging system and an apparatus configuration in a process before and after the system.
FIG. 2 is a schematic configuration diagram of a conventional vertical bag making and packaging machine.
FIG. 3 is a schematic configuration diagram of a vertical bag making and packaging machine according to an embodiment of the present invention.
FIG. 4 is a block configuration diagram of a control unit.
FIG. 5 is a diagram showing a charge length and a separating length.
[Explanation of symbols]
20 Vertical bag making and packaging machine
27 Photoelectric sensor
30 Control unit
31 CPU (comparison means)
71,72 Potato chips group (bulk article)
90 films
90a Tubular film
90b bag
110 Weighing machine (Processing device for the previous process)
130 Control unit
L1 charge length
L2 Separating length

Claims (8)

  1. A vertical bag making and packaging machine that wraps falling bulk goods,
    Detecting means for detecting a leading end of the falling of the massive article and an end of dropping of the massive article;
    Comparing means for obtaining a gap distance between a terminal end of the preceding massive article falling and a leading edge of the subsequent massive article dropping based on a detection result of the detecting means, and comparing the gap distance with a predetermined value;
    Vertical bag making and packaging machine.
  2. Based on the comparison result of the comparison means, further comprising a control unit for transmitting a control signal to the processing device of the previous process,
    The vertical bag making and packaging machine according to claim 1.
  3. The control unit, when the gap distance is smaller than a predetermined lower limit value, sends a control signal to the processing device of the previous process to slow down the processing speed of the processing device,
    The vertical bag making and packaging machine according to claim 2.
  4. When the gap distance is larger than a predetermined upper limit value, the control unit transmits a control signal to the processing device of the previous process to increase the processing speed of the processing device, and the vertical bag-making packaging machine Increase processing speed,
    The vertical bag making and packaging machine according to claim 3.
  5. It is a vertical bag making and packaging machine that performs packaging by sealing the upper and lower ends of the bag in a state where the falling lump-like article enters the bag-shaped cylindrical bag,
    Detecting means for detecting the falling of the massive article from the processing device of the previous process;
    A control unit that automatically adjusts the cycle time of the bag-making packaging based on the detection result of the detection means so as to suppress biting of the massive article into the sealed portion of the package;
    Vertical bag making and packaging machine.
  6. The detecting means detects the leading end of the falling of the massive article and the trailing end of the dropping of the massive article,
    The control unit obtains a gap distance between the end of the preceding massive article dropping and the leading edge of the subsequent massive article dropping based on the detection result of the detecting means, and determines that the gap distance is too small. , Increase the cycle time of bag making packaging and send a control signal to the processing device of the previous process to slow down the processing speed of the processing device,
    The vertical bag making and packaging machine according to claim 5.
  7. When the control unit determines that the gap distance is excessive, the control unit shortens the cycle time of bag making and packaging and transmits a control signal to the processing device in the previous process to increase the processing speed of the processing device. Let
    The vertical bag making and packaging machine according to claim 6.
  8. The control unit determines whether the gap distance is too small or too large based on a plurality of comparisons between the gap distance and a predetermined lower limit value or a predetermined upper limit value.
    The vertical bag making and packaging machine according to any one of claims 4, 6, and 7.
JP2001194161A 2001-06-27 2001-06-27 Vertical bag making and packaging machine Active JP4557298B2 (en)

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JP2001194161A JP4557298B2 (en) 2001-06-27 2001-06-27 Vertical bag making and packaging machine
US10/164,589 US20030000179A1 (en) 2001-06-27 2002-06-10 Longitudinal bag manufacturing and packaging apparatus
EP20020254194 EP1270417A1 (en) 2001-06-27 2002-06-14 Vertical bag manufacturing and packaging apparatus

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CN102890454A (en) * 2011-07-22 2013-01-23 延锋伟世通汽车电子有限公司 Device for controlling product processing time
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US10232968B2 (en) * 2014-10-02 2019-03-19 The Boeing Company Packaging methods
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JP6673685B2 (en) * 2015-12-14 2020-03-25 株式会社イシダ Weighing and packaging system
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