EP1270417A1 - Machine verticale de formation, remplissage et scellage de sacs - Google Patents

Machine verticale de formation, remplissage et scellage de sacs Download PDF

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Publication number
EP1270417A1
EP1270417A1 EP02254194A EP02254194A EP1270417A1 EP 1270417 A1 EP1270417 A1 EP 1270417A1 EP 02254194 A EP02254194 A EP 02254194A EP 02254194 A EP02254194 A EP 02254194A EP 1270417 A1 EP1270417 A1 EP 1270417A1
Authority
EP
European Patent Office
Prior art keywords
bag manufacturing
longitudinal
articles
packaging
packaging apparatus
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP02254194A
Other languages
German (de)
English (en)
Inventor
Yukio c/o Ishida Co. Ltd. Nakagawa
Yasushi c/o Ishida Co. Ltd. Yamaguchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ishida Co Ltd
Original Assignee
Ishida Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ishida Co Ltd filed Critical Ishida Co Ltd
Publication of EP1270417A1 publication Critical patent/EP1270417A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing 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
    • B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
    • B65B9/20—Enclosing 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
    • B65B9/2014—Tube advancing means
    • B65B9/2028—Rollers or belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/26—Devices specially adapted for producing transverse or longitudinal seams in webs or tubes
    • B65B51/30—Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes
    • B65B51/306—Counter-rotating devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B57/00—Automatic control, checking, warning, or safety devices
    • B65B57/10—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of articles or materials to be packaged
    • B65B57/12—Automatic 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B57/00—Automatic control, checking, warning, or safety devices
    • B65B57/10—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of articles or materials to be packaged
    • B65B57/14—Automatic 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B57/00—Automatic control, checking, warning, or safety devices
    • B65B57/18—Automatic control, checking, warning, or safety devices causing operation of audible or visible alarm signals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing 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
    • B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
    • B65B9/20—Enclosing 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
    • B65B9/207—Enclosing 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

Definitions

  • the present invention generally relates to a longitudinal-type bag manufacturing and packaging apparatus. More specifically, the present invention relates to a bag manufacturing apparatus that packages articles that are dropped in batches.
  • a system that performs such weighing and packaging of the articles mainly includes a weighing apparatus, and a bag manufacturing and packaging apparatus.
  • the weighing apparatus performs a combination weighing, by which a predetermined weight or quantity of the articles is obtained.
  • the bag manufacturing and packaging apparatus manufactures bags from a film, and then packages the predetermined amount of articles that are weighed by the weighing apparatus.
  • FIG. 1 An example of an apparatus including the weighing, bag manufacturing and packaging system and the preceding and subsequent processes of such weighing, bag manufacturing and packaging system are shown in Figure 1.
  • articles are conveyed by a supply conveyor 101 to a position above a weighing unit 110.
  • the articles are placed on dispersion feeders 111 to be dispersed radially by vibration of the dispersion feeders 111.
  • the articles are then conveyed to a plurality of circumferentially disposed pool hoppers 113 via radial troughs 112 that continue from the dispersion feeders 111.
  • the articles are temporarily pooled in the pool hoppers 113, and discharged into weighing hoppers 114 that are positioned below each of the pool hoppers 113.
  • the weights of the articles discharged into the weighing hoppers 114 are obtained by load cells (weight detectors) that are provided in each of the weighing hoppers 114. Then, a combination calculation is performed. The combination calculation outputs, based on the measured weights of articles in each of the weighing hoppers 114, a combination of weighing hoppers 114 whose articles, once discharged, add up to a weight or quantity that is within a permitted range. Based on the result of the combination calculation, some of the weighing hoppers 114 discharge the articles into collection discharge chutes 115.
  • a bag manufacturing and packaging apparatus 120 that is positioned below the weighing unit 110 is an apparatus that both manufactures bags, and then packages the articles discharged from the weighing unit 110 in the manufactured bags.
  • a main structure of the bag manufacturing and packaging apparatus 120 is shown in Figure 2. This is a structure of an apparatus known as a longitudinal pillow packaging apparatus.
  • a sheet of a film 90 that is pulled from a film roll 128 (see Figure 1) is shaped into a tubular shape by a tube 121 and a former 122.
  • the film 90 is conveyed downward by a pull down belt mechanism 123. Overlapping longitudinal edges of the tubular film 90a are heat-sealed (sealed by heat) by a longitudinal seal mechanism 124.
  • a transverse seal mechanism 125 that is disposed below the tube 121 seals the upper portion of the bag and the bottom portion of the preceding bag in a transverse direction.
  • the center portion of the transversely sealed portion is cut with a cutter that is provided inside the transverse seal mechanism 125.
  • Bags 90b which have been filled with articles are placed on a conveyor 130 via an inclined guiding board 129. Then, the bags 90b are conveyed to a weight checker 140 and a seal checker (not shown in figures) downstream thereof.
  • Japanese Laid-Open Patent Application 10-77002 discloses detecting means that detects the discharge (dropping) of the articles from the weighing unit in order to automatically adjust the transverse sealing operation.
  • the detecting means since the detecting means only detects the discharge of the articles, changes in the articles that occur after the articles are discharged cannot be reflected in the adjustments. Therefore, depending on the type of articles for which the bag manufacturing and packaging operation is performed, these adjustments may not work effectively. For instance, when the bag manufacturing and packaging is performed at a high speed on articles such as potato chips that are processed in batches, the gap between the batch of articles dropped first and the batch of articles dropped subsequently needs to be set such that the articles do not get caught during the transverse sealing.
  • the longitudinal-type bag manufacturing and packaging apparatus is an apparatus for packaging batches of articles that are dropped.
  • the longitudinal-type bag manufacturing and packaging apparatus includes detection means and comparison means.
  • the detection means detects a bottom end and a top end of batches of articles being dropped.
  • the comparison means obtains a gap distance based on the results detected by the detection means.
  • the gap distance is a distance between the top end of a preceding batch and the bottom end of a subsequent batch. Then, the comparison means compares the gap distance obtained with a predetermined value.
  • the detecting means detects the bottom end and the top end of the batches of the articles. Accordingly, it is possible to obtain a gap distance between batches that are dropped intermittently.
  • the comparing means compares the gap distance with a predetermined value.
  • detecting means ones such as photoelectric sensors that detect passage of the batches of articles directly can be utilized.
  • Vibration sensors which are provided on a member that contacts the batches of articles and detect the top and bottom ends of the batches of articles indirectly can also be utilized.
  • the longitudinal-type bag manufacturing and packaging apparatus is the longitudinal-type bag manufacturing and packaging apparatus according to the first aspect, further comprising a controller.
  • the controller issues a control signal to a processing device used in the preceding process based on the comparison results by the comparison means.
  • the controller that performs a control based on the comparison results from the comparison means.
  • the controller issues a control signal to a processing device used in the preceding process relative to the longitudinal-type bag manufacturing and packaging apparatus.
  • a processing device used in the preceding process such as a weighing unit. Accordingly, it is possible to change the frequency with which the longitudinal bag manufacturing device receives the articles being supplied, which would otherwise not be changeable by simply controlling the longitudinal-type bag manufacturing and packaging apparatus.
  • the longitudinal-type bag manufacturing and packaging apparatus is the longitudinal-type bag manufacturing and packaging apparatus according to the second aspect of the invention, wherein the controller issues a control signal to the processing device used in the preceding process in order to reduce the processing speed of the processing device when the gap distance is smaller than a predetermined minimum value.
  • the gap distance When the gap distance is shortened, there is an increase in the occurrence of improper bag manufacturing. Accordingly, the actual operation rate of the production line decreases. Therefore, a predetermined minimum value is established for the gap distance here. When the gap distance becomes shorter than the minimum value, a control signal is issued in order to decrease the processing speed of the preceding process. Due to the decrease in the processing speed of the preceding process, the number of bags being manufactured by the bag manufacturing and packaging apparatus decreases. However, since the rate of occurrence of improper bag manufacturing decreases, the actual operation rate of the production line increases overall.
  • the longitudinal-type bag manufacturing and packaging apparatus is the longitudinal-type bag manufacturing and packaging apparatus according to the third aspect of the invention, wherein the controller issues a control signal to the processing device used in the preceding process in order to increase the processing speed of the processing device, and to increase the processing speed of the longitudinal-type bag manufacturing and packaging apparatus when the gap distance is greater than a predetermined maximum value.
  • the gap distance When the gap distance is unnecessarily large, it is possible to increase the bag manufacturing speed of the longitudinal-type bag manufacturing and packaging apparatus, while maintaining a favorable rate of improper bag manufacturing that is caused by articles being caught.
  • the processing speed of both the processing device used in the preceding process and the longitudinal-type bag manufacturing and packaging apparatus can be increased, such that the processing capacity can be increased as a whole.
  • the longitudinal-type bag manufacturing and packaging apparatus is an apparatus that is adapted to package articles by sealing top and bottom ends of a manufactured tubular bag while batches of the articles are dropped in the bag.
  • the longitudinal-type bag manufacturing and packaging apparatus includes detection means and a controller.
  • the detection means detects a discharge of the articles from a processing device used in a preceding process.
  • the controller automatically adjusts the cycle time of a bag manufacturing and packaging operation based on the results detected by the detection means, such that the articles are not caught in the sealed portions of the bags.
  • the cycle time is a predetermined period of time, between the time when one bag is manufactured and packaged and the time when the next bag is manufactured and packaged. In other words, the cycle time is a predetermined period of time that is necessary to manufacture and package one bag.
  • the cycle time of the bag manufacturing and packaging operation is adjusted automatically based on the results from the detection means, taking into consideration the constant change of the state of the dropped articles that occurs due to factors including a change in the state of the articles and a change in environmental factors such as temperature.
  • the longitudinal-type bag manufacturing and packaging apparatus is the longitudinal-type bag manufacturing and packaging apparatus of the fifth aspect, wherein the detection means detects the top and bottom ends of batches of articles being dropped.
  • the controller obtains a gap distance based on the results detected by the detection means.
  • the gap distance is a distance between the top end of a preceding batch and the bottom end of a subsequent batch.
  • the controller lengthens the cycle time of the bag manufacturing and packaging operation and issues a control signal to the processing device used in the preceding process in order to reduce the processing speed of the processing device.
  • the focus is on the constant change in the gap distance between the batches of articles, which occurs because of constant change in the state of articles being dropped.
  • the change in the gap distance occurs, even when the cycle time does not change, due to factors including a change in the articles and a change in environmental factors such as temperature.
  • the gap distance between batches of articles which has a great impact on whether the articles get caught in the bag manufacturing portion, is obtained from the result of detection from the detection means.
  • the cycle time of the bag manufacturing and packaging operation is lengthened, and the processing speed of the processing device of the preceding process is decreased.
  • the ratio of improper bag manufacturing due to articles getting caught decreases. Accordingly, the actual operation rate of the production line increases overall.
  • the longitudinal-type bag manufacturing and packaging apparatus is the longitudinal-type bag manufacturing and packaging apparatus of the sixth aspect of the invention, wherein the controller shortens the cycle time of the bag manufacturing and packaging operation and issues a control signal to the processing device of the preceding process in order to increase the processing speed of the processing device when the gap distance is determined to be too large.
  • the focus is on the constant change in the gap distance between the batches of articles that occurs because of constant change in the state of articles being dropped.
  • the change in the gap distance occurs even when the cycle time does not change due to factors including a change in the state of the articles and a change in environmental factors such as temperature.
  • the processing speed of the processing device of the preceding process is increased, while shortening the cycle time. In this manner, the number of bags manufactured by the bag manufacturing and packaging apparatus per a given period of time is increased.
  • the longitudinal-type bag manufacturing and packaging apparatus is the longitudinal-type bag manufacturing and packaging apparatus of the fourth, sixth, or the seventh aspect of the invention, wherein the controller determines whether the gap distance is too large or too small by comparing a plurality of the gap distances with a predetermined minimum value or a predetermined maximum value.
  • an appropriate lower limit or an upper limit to the gap distance is established.
  • whether the gap distance is too large or too small is determined based on comparison of several measurements of gap distance.
  • FIG 3 shows a schematic view of the structure of a longitudinal-type bag manufacturing and packaging apparatus 20 in accordance with the first embodiment of the present invention.
  • This longitudinal-type bag manufacturing and packaging apparatus 20 is a device for inserting food articles (potato chips in this embodiment) into bags.
  • the longitudinal-type bag manufacturing and packaging apparatus 20 mainly includes a bag manufacturing and packaging unit 20a, a film supply unit 20b, and a controller 30 (see Figure 4).
  • the bag manufacturing and packaging unit 20a performs the insertion of the articles.
  • the film supply unit 20b supplies a film 90 to the bag manufacturing and packaging unit 20a that will become bags.
  • the film supply unit 20b supplies the the film 90 to a tube 21 and a former 22 of the bag manufacturing and packaging unit 20a, which will be described later.
  • a roll, in which the film 90 is wound, is set in the film supply unit 20b so that the film 90 is unreeled from the roll.
  • the bag manufacturing and packaging unit 20a mainly includes a film forming mechanism, a pull down belt mechanism 23, a longitudinal seal mechanism 24, a transverse seal mechanism 25, and a discharge guiding plate 29.
  • the film forming mechanism includes the tube 21 and the former 22.
  • the tube 21 is a cylindrical member having top and bottom ends that are open.
  • the tube 21 is made integral with the former 22 through a bracket.
  • the weighed potato chips are inserted into the opening of the top end of the tube 21 from a weighing unit 110.
  • the former 22 is disposed so as to surround the tube 21.
  • the former 22 is shaped such that the film 90 conveyed from the film supply unit is formed in a tubular shape when the tube 90 passes through the tube 21 and the former 22.
  • the pull down belt mechanism 23 is a mechanism for transferring downward the film 90 that is wrapped around the tube 21.
  • the pull down belt mechanism 23 mainly includes a driving roller and a driven roller, as well as a belt that functions as a suction device.
  • the longitudinal seal mechanism 24 is a mechanism that presses the overlapping portions of the film 90 wrapped around the tube 21 against the tube 21 with a predetermined pressure while heating the overlapping portions, thereby sealing the film 90 in a longitudinal direction.
  • the longitudinal seal mechanism 24 includes a heater and a heater belt that is heated by the heater, and contacts the overlapping portions of the film 90.
  • the transverse seal mechanism 25 is placed beneath the forming mechanism, the pull down belt mechanism 23, and the longitudinal seal mechanism 24.
  • the transverse seal mechanism 25 includes a pair of seal jaws 25a, which is symmetrical on the left and right sides.
  • the two seal jaws 25a rotate in the shape of the letter D, drawing trajectories T that are symmetric relative to each other.
  • the seal jaws 25a are pressed against each other when the tubular film 90a, which is formed by the longitudinal sealing, is transversely sealed.
  • the transverse seal mechanism 25 has a cutter inside, which is not shown in the figures. The cutter severs the bag from the tubular film 90a that follows the bag, at the center of the part sealed by the seal jaws 25a.
  • the transverse seal mechanism 25 sandwiches the tubular film 90a to press the part to be transversely sealed.
  • a heater with a thermocouple are provided in each of the seal jaws 25a.
  • the controller 30 shown in Figure 4 controls the operations of each driving portion of the longitudinal-type bag manufacturing and packaging apparatus 20.
  • the controller 30 also controls the timing at which articles are discharged from the weighing unit or the article supplier 110, which is a preceding process.
  • the controller 30 preferably includes a microcomputer with a control program that controls the bag manufacturing and packaging portion 20a as discussed below.
  • This controller 30 includes a CPU 31, a ROM 32, a RAM 33, a display 34, and an input portion 35.
  • the ROM 32, the RAM 33, the display 34, and the input portion 35 are operatively coupled to the CPU 31.
  • the display 23 and the input portion 35 are placed on the front side of the longitudinal-type bag manufacturing and packaging apparatus 20.
  • the controller 30 is operatively coupled with the devices that it controls, including the pull down belt mechanism 23, the longitudinal seal mechanism 24, the transverse seal mechanism 25, and a driving device of the film supply unit 20b, as well as the photoelectric sensors 27. It will be apparent to those skilled in the art from this disclosure that the precise structure and algorithms for controller 30 can be any combination of hardware and software that will carry out the functions of the present invention. In other words, "means plus function" clauses as utilized in the specification and claims should include any structure or hardware and/or algorithm or software that can be utilized to carry out the function of the "means plus function” clause.
  • the photoelectric sensors 27 are disposed above the tube 21. More specifically, an transparent tubular member 26 formed from an acrylic material is inserted between the tube 21 and a discharge outlet of a collection discharge chute 115 of the weighing unit 110, which is disposed above the tube 21.
  • the pair of photoelectric sensors 27, which emits and receives light, is disposed so as to be able to monitor the articles passing through the tubular member 26 (See Figure 3).
  • the photoelectric sensors 27 constantly send to the controller 30 a signal indicating whether or not the batch of potato chips, which is dropped form the collection discharge chute 115 of the weighing unit 110 to the tube 21 through the tubular member 26, is passing between the photoelectric sensors 27. In this manner, the photoelectric sensors 27 function as detection means.
  • the longitudinal-type bag manufacturing and packaging apparatus 20 of the present embodiment can manufacture and package twenty to two hundred bags or articles in one minute.
  • the controller 30 calculates the cycle time, which is the length of time necessary to manufacture one bag and package one bag of articles, based on the number of bags to be manufactured in a given period of time inputted for configuration. Then, the controller 30 controls the speed with which the pull down belt mechanism 23 feeds the tubular film 90a downward and the speed with which the seal jaws 25a of the transverse seal mechanism 25 rotate, such that these speeds correspond to the cycle time. In this manner, the controller 30 functions as an adjusting means. Based on the cycle time, the controller 30 sends to a controller 130 of the weighing unit 110 a request signal requesting a discharge of the articles.
  • the controller 30 also functions as a signal issuing means. Once the controller 130 of the weighing unit 110 receives a request signal, the controller 130 performs the weighing discharge operation, dropping a batch of potato chips to the longitudinal-type bag manufacturing and packaging apparatus 20, and returns a discharge completion signal to the controller 30 of the longitudinal-type bag manufacturing and packaging apparatus 20.
  • the controller 30 obtains from the photoelectric sensors 27 data on the time at which the bottom end (first end) of the batch of potato chips passes the position of the photoelectric sensors 27. Based on this data, the controller 30 automatically adjusts the timing at which the batch of potato chips is dropped and the timing at which the seal jaws 25a of the transverse seal mechanism 25 perform the transverse sealing. As is graphically depicted in Figure 5, the controller 30 recognizes the timings at which the potato chips 71a and 72a, which are the bottom ends of the batches of potato chips 71 and 72, pass the height position of the photoelectric sensors 27.
  • the controller 30 here calculates a separating length L2 for adjustment of the cycle time, in order to prevent the potato chips from getting caught in the transverse sealing portion of the bag 90b.
  • the separating length L2 is, as seen in Figure 5, a gap distance (opening) in the vertical direction between the preceding batch of potato chips 71 and the subsequent batch of potato chips 72, which are discharged from the weighing unit 110 and fall on their weight. More specifically, the separating length L2 is the gap distance between the potato chip 71b that is at the top end of the first dropped batch of potato chips 71 and the potato chip 72a that is at the bottom end of the subsequently dropped batch of potato chips 72.
  • the vertical length of the batch of potato chips 71 is a charge length L1, which is shown in Figure 5.
  • the separating length L2 becomes shorter as the charge length L1 becomes longer.
  • the charge length L1 varies at each cycle.
  • the charge length L1 can also vary due to changes in the surrounding environment or changes in the production process of the potato chips. For instance, when the temperature surrounding the longitudinal-type bag manufacturing and packaging apparatus 20 goes up, the charge length L1 of the batch of the potato chips tends to increase due to an increased dispersion of the potato chips.
  • the charge length L1 can also change constantly due to changes in the size of the potatoes from which the potato chips are made, the thickness of the slices, or the seasonings applied to the surfaces of the potato chips.
  • the controller 30 changes the frequency of discharges from the weighing unit 110 by adjusting the cycle time, so as to optimize the separating length L2.
  • the controller 30 calculates the charge length L1 and the separating length L2 based on the results of detection by the photoelectric sensors 27. Then, the controller 30 compares the separating length L2 with the predetermined maximum value and the predetermined minimum value. In this manner, the controller 30 functions as comparison means.
  • the controller 30 changes the configuration to make the cycle time longer, thereby reducing the processing capacity.
  • the controller 30 issues a request signal to the controller 130 of the weighing unit 110 in such a manner that the articles are discharged in accordance with the cycle time. Due to the longer cycle time, the frequency of the request signal to the controller 130 requesting discharge of the articles decreases.
  • the controller 30 is effectively sending a command to the controller 130 to reduce the processing speed of the weighing unit 110 (in other words, to reduce the number of batches of potato chips that are discharged in a given period of time).
  • the controller 30 changes the configuration to shorten the cycle time (for instance by increasing by 5 the number of bags to be manufactured and packaged in one minute). Accordingly, the processing speeds of the film supply unit 20b and each of the mechanisms 23-25 increase. Also, the controller 30 issues the request signal requesting the discharge of the articles to the controller 130 of the weighing unit 110 such that the articles are discharged in accordance with the cycle time. Due to the shortened cycle time, the frequency of the request signal to the controller 130 requesting discharge of the articles increases.
  • the controller 30 changes the configuration to shorten the cycle time, the controller 30 is effectively sending a command to the controller 130 to increase the processing speed of the weighing unit 110 (in other words to increase the number of batches of potato chips that are discharged in a given period of time).
  • the predetermined minimum value and the predetermined maximum value should be set low enough and high enough such that the separating length L2 will not reach them due to variances in each cycle.
  • the longitudinal-type bag manufacturing and packaging apparatus 20 of the present embodiment detects the change in the state of the dropped articles as the change occurs due to changes in the state of the articles or changes in the surrounding environment such as temperature. Then, the cycle time of the bag manufacturing and packaging operation is automatically adjusted based on the result of the detection by the photoelectric sensors 27.
  • the longitudinal-type bag manufacturing and packaging apparatus 20 calculates the separating length L2, which has a great impact on whether the articles are likely to be caught in the transverse sealing portion.
  • the longitudinal-type bag manufacturing and packaging apparatus 20 lengthens the cycle time and reduces the processing speed of the weighing unit 110, which is the preceding process. In this manner, although the number of bags that are manufactured by the longitudinal-type bag manufacturing and packaging apparatus 20 in a given period of time decreases, the ratio of improper bag manufacturing due to articles getting caught decreases. Accordingly, the actual operation rate of the production line increases overall.
  • the separating length L2 is automatically adjusted in accordance with the change. Therefore, the articles are prevented from being caught in the transverse sealing portion, and the number of bags manufactured and packaged is optimized to the highest possible level.
  • the controller 30 when the separating length L2 becomes shorter than the predetermined minimum value, the controller 30 changes the configuration to lengthen the cycle time.
  • the controller 30 in view of the variances in the separating length L2 in each cycle, it is possible to set a condition such as that the separating length is shorter than the minimum value for several consecutive times, or that the average value of several recent measurements of separating length L2 is shorter than the minimum value.
  • the above embodiment utilizes photoelectric sensors 27.
  • a vibration sensor to the collection discharge chute 115 or the tubular member 26, with which the batches of potato chips collide.
  • the controller 30 detects the top and bottom ends of the batches of potato chips by analyzing the vibration waves sent from the vibration sensor.
  • the cycle time is adjusted automatically by comparing the separating length L2 with the predetermined values.
  • the automatic adjustment to lengthen the cycle time is performed when the separating length L2 is shorter than the predetermined minimum value. It is also possible to only issue a warning to the operator, instead of performing such automatic adjustment.
  • the controller functions as alert means.
  • the time-series variances of the separating length L2 can be displayed to the operator.
  • a screen that alerts the operator to the possibility of articles getting caught can be displayed.
  • the gap distance between the batches of articles that are dropped intermittently is obtained, and the gap distance is compared with the predetermined values. Therefore, it is possible to determine, based on the result of the comparison, whether the articles are likely to get caught in the packaging portion. Accordingly, it is possible to issue a warning to the operator or perform a control to enlarge the gap distance when the articles are likely to get caught. Where a warning is issued to the operator, the operator can quickly become aware of the likelihood of the packaging deficiency and take an appropriate measure. Where the control to enlarge the gap distance is performed, it is possible to automatically prevent the articles from getting caught in the packaging portion.
EP02254194A 2001-06-27 2002-06-14 Machine verticale de formation, remplissage et scellage de sacs Withdrawn EP1270417A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001194161 2001-06-27
JP2001194161A JP4557298B2 (ja) 2001-06-27 2001-06-27 縦型製袋包装機

Publications (1)

Publication Number Publication Date
EP1270417A1 true EP1270417A1 (fr) 2003-01-02

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EP02254194A Withdrawn EP1270417A1 (fr) 2001-06-27 2002-06-14 Machine verticale de formation, remplissage et scellage de sacs

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US (1) US20030000179A1 (fr)
EP (1) EP1270417A1 (fr)
JP (1) JP4557298B2 (fr)

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WO2011138208A1 (fr) * 2010-05-06 2011-11-10 Rovema Gmbh Dispositif de dosage doté d'un système de surveillance d'endommagement
CN104303120A (zh) * 2012-05-16 2015-01-21 利乐拉瓦尔集团及财务有限公司 用于包装机的监测系统

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DE60315581T2 (de) * 2002-11-29 2008-05-15 Ishida Co., Ltd. Wiege- und Aromatisierungseinrichtung und Verpackungsmaschine
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JP2005313966A (ja) * 2004-04-30 2005-11-10 Ishida Co Ltd 熱封止装置およびこれを備えた製袋包装機
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