Bag-making packaging machine

Abstract

To provide a bag manufacturing and packaging machine that suppresses reduction in the quality of bags to be manufactured and also suppresses reduction in the operation rate.SOLUTION: A bag manufacturing and packaging machine (100) for forming a sheet-like film into a tubular shape, transversely sealing a bag, and manufacturing a bag (B) that accommodates an article (A) includes a transversely sealing mechanism (50) and a control unit (70). The transversely sealing mechanism (50) sandwiches and transversely seals a tubular film (Fm) to form a transversely sealed portion (X). The control unit (70) determines whether there is any biting in the transversely sealed portion (X) and switches between a first bag manufacturing process regarding bag-making and a second bag manufacturing process, which is different from the first bag manufacturing process, on the basis of the state of the biting when it is determined that there is the biting.SELECTED DRAWING: Figure 8

Description

Technical Field

[0001] The present invention relates to a bag-making packaging machine.

Background Art

[0002] As disclosed in Patent Document 1 (Japanese Patent Application Laid-Open No. 2016-107997), there is known a bag-making packaging machine that drops an article into a cylindrically formed film, seals it, and makes a bag. The bag-making packaging machine of Patent Document 1 includes a determination means for determining a sealing defect. When a sealing defect is determined by the determination means, the packaging control unit pauses the operation of the cutter of the horizontal sealing means to make a continuous package including the portion where the foreign matter is caught, or temporarily stops a part of the operation mechanism such as the horizontal sealing means or the entire bag-making filling machine to give an alarm, or performs predetermined processing such as discharging the package for which the foreign matter bite has been determined to the outside of the system on the downstream side.

Summary of the Invention

Problems to be Solved by the Invention

[0003] However, the inventor has found that there are cases where the quality of the bags produced by the bag-making packaging machine of Patent Document 1 deteriorates, or the operating rate of the bag-making packaging machine decreases.

[0004] An object of the present invention is to provide a bag-making packaging machine that suppresses a decrease in the quality of the bags to be produced and suppresses a decrease in the operating rate.

Means for Solving the Problems

[0005] A bag-making packaging machine according to a first aspect is a bag-making packaging machine that forms a sheet-like film into a cylindrical shape, performs a horizontal seal, and manufactures a bag containing an article, and includes a horizontal seal mechanism and a control unit. The horizontal seal mechanism sandwiches and horizontally seals a cylindrically formed tubular film to form a horizontal seal portion. The control unit determines the presence or absence of biting in the horizontal seal portion, and when it is determined that there is biting, based on the state of the biting, switches between a first bag-making process related to bag-making and a second bag-making process different from the first bag-making process.

[0006] The inventor has found that the problems that the quality of the bags produced by the bag-making and packaging machine of Patent Document 1 above may deteriorate or the operating rate of the bag-making and packaging machine may decrease are based on the following factors. Specifically, when a seal defect is determined and a continuous-packed bag is used, if the bag is torn and the article comes out of the bag, the article adheres to the member for making a horizontal seal. If the production of bags is continued in this state, the article adheres to the bags produced later, resulting in a decrease in the quality of the bags. To prevent this, when a seal defect is determined, if the bag-making operation of the bag-making and packaging machine is stopped, the operating rate will decrease.

[0007] Therefore, as a result of intensive studies to achieve both suppression of quality deterioration and suppression of a decrease in the operating rate, the inventor has conceived of changing the bag-making process based on the state of biting-in when it is determined that there is biting-in of the article during horizontal sealing, and has completed the present invention.

[0008] The bag-making and packaging machine according to the first aspect includes a control unit that switches between a first bag-making process related to bag-making and a second bag-making process different from the first bag-making process based on the state of biting-in. Therefore, based on the state of biting-in, it is possible to perform a first bag-making process for suppressing a decrease in the operating rate and a second bag-making process for suppressing a decrease in quality. Accordingly, it is possible to provide a bag-making and packaging machine that suppresses a decrease in the quality of the bags to be produced and also suppresses a decrease in the operating rate.

[0009] The bag-making and packaging machine according to the second aspect is the bag-making and packaging machine according to the first aspect, and the control unit switches between the first bag-making process and the second bag-making process based on at least two determination values.

[0010] In the bag-making and packaging machine according to the second aspect, the control unit has a determination value related to the state of biting-in. Therefore, by setting a determination value when a relatively large object is bitten in and a determination value when a relatively small object is bitten in, it is possible to easily determine the state of biting-in based on a plurality of determination values.

[0011] The bag-making and packaging machine according to the third aspect is the bag-making and packaging machine according to the first aspect or the second aspect, and further includes a cutting mechanism for cutting the horizontal seal portion. The control unit performs, as a first bag-making process, a process of manufacturing a continuous packaging bag by stopping the cutting of the horizontal seal portion by the cutting mechanism.

[0012] In the bag-making and packaging machine according to the third aspect, in the case of biting in a relatively small object as the biting state, the bag-making operation is not stopped and a continuous packaging bag is manufactured. In this way, in the case of a small bite, since the bag-making operation is continued, a decrease in the operation rate can be suppressed. Further, by making the bitten bag into a continuous packaging bag, it can be easily identified as a defective product.

[0013] The bag-making and packaging machine according to the fourth aspect is the bag-making and packaging machine according to the first aspect to the third aspect, and the control unit performs, as a second bag-making process, a process of stopping the bag-making operation.

[0014] In the bag-making and packaging machine according to the fourth aspect, in the case of biting in a relatively large object as the biting state, the bag-making operation is stopped. For this reason, when an article is bitten in, even if the article comes out of the bag, the bag-making operation is stopped, so that cleaning or the like can be performed. Therefore, it is possible to suppress the adhesion of the article to the bag manufactured after the biting, and thus it is possible to suppress a decrease in the quality of the bag to be manufactured.

[0015] The bag-making and packaging machine according to the fifth aspect is the bag-making and packaging machine according to the first aspect to the fourth aspect, and at least one of the first bag-making process and the second bag-making process includes a process of changing the bag-making ability.

[0016] In the bag-making and packaging machine according to the fifth aspect, after performing a process of manufacturing a continuous packaging bag or the like as the first bag-making process and / or after performing a process of stopping the bag-making operation or the like as the second process, a process of automatically changing the bag-making ability is performed. Thereby, the occurrence of biting can be reduced.

[0017] The bag-making packaging machine according to the sixth aspect is the bag-making packaging machine according to the second aspect, wherein the first bag-making process causes a display when it exceeds a first determination value, and the second bag-making process causes a display when it exceeds a second determination value.

[0018] In the bag-making packaging machine of the sixth aspect, different displays can be made based on the biting state. Therefore, the user can recognize the biting state.

Advantages of the Invention

[0019] According to the present invention, it is possible to provide a bag-making packaging machine that suppresses a decrease in the quality of the bags to be manufactured and suppresses a decrease in the operating rate.

Brief Description of the Drawings

[0020]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Embodiments for Carrying Out the Invention

[0021] The bag-making and packaging machine 100 according to an embodiment of the present invention will be described below. In the following description, expressions such as "front (front side)", "rear (back side)", "upper", "lower", "left", and "right" may be used to represent directions and the like. Unless otherwise specified, "front", "rear", "upper", "lower", "left", and "right" here follow the directions of the arrows attached to the drawings.

[0022] (1) Overall Overview FIG. 1 is a perspective view of the packaging machine 1 including the bag-making and packaging machine 100 of the present embodiment. FIG. 2 is a schematic diagram of the packaging machine 1 including the bag-making and packaging machine 100 of the present embodiment. In FIGS. 1 and 2, the packaging machine 1 includes a weighing machine 2 and a bag-making and packaging machine 100.

[0023] As shown in FIGS. 1 and 2, the weighing machine 2 weighs the article A to be accommodated in the bag B. The article A is not particularly limited, but here, it is an article such as potato chips or chocolate. The bag-making and packaging machine 100 is installed below the weighing machine 2. The bag-making and packaging machine 100 receives the article A from the weighing machine 2 and packages the article A with a film F formed in a cylindrical shape (hereinafter also referred to as a cylindrical film Fm) to manufacture the bag B shown in FIG. 3. FIG. 3 is a schematic diagram of the bag B manufactured by the bag-making and packaging machine 100 of the present embodiment, showing two bags B.

[0024] The bag-making and packaging machine 100 includes a film supply mechanism 10, a forming mechanism 20, a conveying mechanism 30, a longitudinal sealing mechanism 40, a transverse sealing mechanism 50, a cutting mechanism 60, and a control unit 70 shown in FIG. 4. Note that FIG. 4 is a block diagram of the bag-making and packaging machine 100 of the present embodiment.

[0025] The film supply mechanism 10 supplies the sheet-like film F that forms the bag B to the forming mechanism 20. The forming mechanism 20 forms the supplied sheet-like film F into a tubular shape. The conveying mechanism 30 conveys the tubular film F (tubular film Fm) downward. The longitudinal sealing mechanism 40 longitudinally seals the tubular film Fm formed into a tubular shape to form the longitudinal seal portion Y shown in FIG. 3. The transverse sealing mechanism 50 sandwiches and transversely seals the tubular film Fm to form the transverse seal portion X shown in FIG. 3, thereby sealing the upper and lower ends of the bag B. The cutting mechanism 60 cuts the upper and lower ends of the bag B. The control unit 70 determines the presence or absence of biting-in at the transverse seal portion X, and when it is determined that there is biting-in, based on the state of biting-in, it switches between a first bag-making process related to bag-making and a second bag-making process different from the first bag-making process.

[0026] (2-1) Film supply mechanism The film supply mechanism 10 shown in FIGS. 1 and 2 supplies the sheet-like film F to the forming mechanism 20. A film roll R around which the film F is wound is set in the film supply mechanism 10, and the film F is drawn out from this film roll R. The material of the film F is not particularly limited, and includes, for example, resin materials, paper materials, and the like.

[0027] (2-2) Forming mechanism The forming mechanism 20 is a forming mechanism that forms the sheet-like film F into a tubular shape. As shown in FIG. 2, the forming mechanism 20 has a sealer 21 and a tube 22. The tube 22 extends in the vertical direction. The tube 22 is a partially tubular member with open upper and lower ends. The article A weighed by the weighing machine 2 is put into the opening at the upper end of this tube 22.

[0028] The sealer 21 is arranged so as to surround the tube 22. The sheet-like film F supplied from the film supply mechanism 10 is formed into a tubular shape when passing between the sealer 21 and the tube 22. The sealer 21 and the tube 22 can be replaced according to the size of the bag B to be manufactured.

[0029] (2-3) Conveying mechanism The conveying mechanism 30 conveys the tubular film Fm. Here, the conveying mechanism 30 conveys the film F drawn from the film roll R to the sealer 21. Further, the conveying mechanism 30 conveys the tubular film Fm formed by the sealer 21 to the horizontal sealing mechanism 50. The conveying mechanism 30 adsorbs the tubular film Fm wound around the tube 22 and conveys it downward.

[0030] The conveying mechanism 30 is disposed below the sealer 21. Further, the conveying mechanism 30 is disposed on the left side (not shown) and the right side of the tube 22, respectively.

[0031] The conveying mechanism 30 includes a belt 31, a driving roller 32, and a driven roller 33. The belt 31 has an adsorption function. The belt 31 is wound around the driving roller 32 and the driven roller 33. The driving roller 32 is connected to a roller driving motor (not shown) and is driven by the roller driving motor. When the driving roller 32 is driven by the driving motor with the belt 31 adsorbing the film F, the tubular film Fm is conveyed downward.

[0032] (2-4) Longitudinal Sealing Mechanism The longitudinal sealing mechanism 40 seals the overlapping portion of the tubular film Fm in the longitudinal direction (the vertical direction in FIG. 2) to form the longitudinal seal portion Y shown in FIG. 3. The longitudinal sealing mechanism 40 heats and longitudinally seals the overlapping portion of the tubular film Fm wound around the tube 22 while pressing it against the tube 22 with a certain pressure.

[0033] The longitudinal sealing mechanism 40 is located on the front (front) side of the tube 22 and has a heater and a heater belt that is heated by the heater and contacts the joint of the tubular film Fm. Further, the longitudinal sealing mechanism 40 further has a driving device (not shown) for moving the heater belt closer to or farther away from the tube 22.

[0034] (2-5) Horizontal Sealing Mechanism The horizontal sealing mechanism 50 is disposed below the tube 22. The horizontal sealing mechanism 50 horizontally seals the tubular film Fm in a direction intersecting (orthogonal in FIG. 2) the conveyance direction of the tubular film Fm. Here, the horizontal sealing mechanism 50 seals the bag B by horizontally sealing the portions that become the upper and lower ends of the bag of the tubular film Fm.

[0035] FIG. 5 is a side view of the horizontal sealing mechanism 50. FIG. 6 is a side view of the trajectories of the seal jaws 51 and 52. In FIG. 5, the horizontal sealing mechanism 50 includes a first sealing mechanism 50a and a second sealing mechanism 50b. Here, the side located on the left side of the tubular film Fm in FIG. 5 is defined as the first sealing mechanism 50a, and the side located on the right side is defined as the second sealing mechanism 50b.

[0036] Each of the first sealing mechanism 50a and the second sealing mechanism 50b sandwiches the tubular film Fm while rotating the seal jaws 51 and 52 in a D shape (for example, refer to the trajectory of the seal jaws shown by the dotted line in FIG. 6).

[0037] The seal jaws 51 and 52 have heaters inside. The seal surfaces of the seal jaws 51 and 52 are heated by these heaters, and a part of the tubular film Fm sandwiched by the seal jaws 51 and 52 is sealed.

[0038] Here, for the sake of convenience of explanation, the side of the seal jaw 51 on the first sealing mechanism 50a side is referred to as the first seal jaw 51a, and the side on the second sealing mechanism 50b side is referred to as the second seal jaw 51b. The first seal jaw 51a and the second seal jaw 51b press against each other with the tubular film Fm sandwiched therebetween for sealing.

[0039] Similarly, the side of the seal jaw 52 on the first sealing mechanism 50a side is referred to as the first seal jaw 52a, and the side on the second sealing mechanism 50b side is referred to as the second seal jaw 52b. The first seal jaw 52a and the second seal jaw 52b press against each other with the tubular film Fm sandwiched therebetween for sealing.

[0040] When referring to matters common to all the seal jaws, they are expressed as the seal jaws 51 and 52.

[0041] The seal jaws 51 and 52 rotate about the shafts C1 and C2 by a drive motor (not shown). That is, the first seal jaws 51a and 52a rotate about the shaft C1, and the second seal jaws 51b and 52b rotate about the shaft C2.

[0042] Also, as shown in FIG. 5, a lateral drive mechanism 55 for reciprocating the lateral seal mechanism 50 is provided. The lateral drive mechanism 55 is, for example, a servo motor.

[0043] The lateral seal mechanism 50 further includes an encoder 56 shown in FIG. 4. The encoder 56 detects the operating amount of the lateral drive mechanism 55.

[0044] (2-6) Cutting mechanism The cutting mechanism 60 shown in FIG. 2 cuts the lateral seal portion X shown in FIG. 3. Specifically, the cutting mechanism 60 cuts the tubular film Fm at the lateral seal portion X which is the end of the bag B.

[0045] As shown in FIG. 2, the cutting mechanism 60 is provided in the lateral seal mechanism 50. The cutting mechanism 60 includes a cutter 61 and a receiving portion 62. The cutter 61 is provided on the first seal jaw 51. The receiving portion 62 is provided on the second seal jaw 52. The cutter 61 can extend and retract. The extended cutter 61 is received in the receiving portion 62. By extending the cutter 61, at the lateral seal portion X, a transverse cut is made at the central portion in the conveyance direction of the tubular film Fm.

[0046] (2-7) Control unit The control unit 70 shown in FIG. 4 controls the operations of the conveyance mechanism 30, the longitudinal seal mechanism 40, the lateral seal mechanism 50, and the cutting mechanism 60. Also, the control unit 70 sends commands regarding the operation of the metering machine 2 to the control unit of the metering machine 2.

[0047] The control unit 70 is implemented by a computer. The control unit 70 includes a control arithmetic unit and a storage device. As the control arithmetic unit, a processor such as a CPU or a GPU can be used. The control arithmetic unit reads a program stored in the storage device and performs predetermined image processing and arithmetic processing according to this program. Further, the control arithmetic unit can write the arithmetic result into the storage device or read the information stored in the storage device according to the program.

[0048] As shown in FIG. 4, the control unit 70 includes a storage unit 71 and a determination unit 72. The storage unit 71 has a plurality of determination values regarding the biting state. The determination unit 72 determines the presence or absence of biting in the horizontal seal portion X, and when it is determined that there is biting, based on the biting state, it switches between a first bag-making process related to bag-making and a second bag-making process different from the first bag-making process. Here, the determination unit 72 switches between the first bag-making process and the second bag-making process based on at least two determination values. The first bag-making treatment and the second bag-making process are different from the normal bag-making process.

[0049] Note that "biting in the horizontal seal portion X" means that when forming the horizontal seal portion X, something that should not be there (such as article A, etc.) is sandwiched, and a horizontal seal portion X with something that should not be there intervening between the tubular films Fm is formed.

[0050] (2-7-1) Storage Unit The storage unit 71 has a plurality of determination values regarding the biting state. The storage unit 71 stores a plurality of determination criteria calculated by acquiring information from the horizontal seal mechanism 50.

[0051] In this embodiment, the storage unit 71 has a first determination value for performing the first bag-making process (continuous bag discharging process) and a second determination value for performing the second bag-making process (bag-making stop process). In other words, the storage unit 71 has a first determination value for determining the first biting state and a second determination value for determining the second biting state. The first determination value is a threshold value for determining that a relatively small object has been bitten. The case where a relatively small object has been bitten is a case where the influence on the quality is small even if the bag-making operation is continued. The biting of a relatively small object is, for example, the biting of a bag (tubular film Fm) such as a tack, the biting of a small object such as powder for seasoning as the article A, the biting of a small object such as powder constituting a part of the article A, etc. The second determination value is a threshold value for determining that a relatively large object has been bitten. The case where a relatively large object has been bitten is a case where the influence on the quality is large if the bag-making operation is continued. The biting of a relatively large object is, for example, the biting of a large object such as potato chips or chocolate as the article A.

[0052] (2-7-2) Determination unit When the horizontal sealing mechanism 50 performs horizontal sealing, the determination unit 72 determines whether an article A or the like has been bitten into the horizontal seal portion X based on a plurality of determination values. Here, the determination unit 72 reads the first determination value and the second determination value from the storage unit 71, determines the presence or absence of biting, and further determines the state of biting if biting is present.

[0053] When the determination unit 72 determines that there is biting in the first biting state according to a predetermined first determination value, as the first bag-making process, it stops the cutting of the horizontal seal portion X by the cutting mechanism 60 and performs a process of manufacturing a continuous bag in which a plurality of bags are connected. Since the continuous bag has a different length from that of the normal bag B, it is easy to identify as a defective product. The continuous bag is not limited as long as it is longer than the length of the normal bag B, but it is preferable that two or more bags B are connected. Here, two bags B are connected. In this case, the determination unit 72 sends a command to the cutting mechanism 60 to stop the cutting of the horizontal seal portion X once.

[0054] Further, the determination unit 72 performs a process of stopping the bag-making operation as the second bag-making process according to a predetermined second determination value. In this case, the determination unit 72 sends a command to stop the operation to the weighing machine 2, the transport mechanism 30, the longitudinal sealing mechanism 40, the transverse sealing mechanism 50, the cutting mechanism 60, and the like.

[0055] At least one of the first bag-making process and the second bag-making process includes a process of changing the bag-making ability. Here, at least one of the first bag-making process and the second bag-making process includes a process of automatically changing the bag-making ability. That is, after the determination unit 72 performs a process of manufacturing a continuous packaging bag as the first bag-making process and / or after performing a process of stopping the bag-making operation as the second bag-making process, the determination unit 72 performs a process of changing the bag-making ability. In the present embodiment, when the determination unit 72 determines that there is a bite, although relatively small, after performing a process of manufacturing a continuous packaging bag as the first bag-making process, the bag-making ability is changed based on the setting in the setting unit 73 described later.

[0056] The change in the bag-making ability includes, for example, a change in the number of bags B manufactured per minute, a change in the timing at which the article A is input from the upstream weighing machine 2, a change in the timing at which the transverse seal portion X is formed by the transverse sealing mechanism 50, and the like.

[0057] (2-7-3) Specific Example Here, with reference to FIGS. 7 and 8, an example will be described in which the control unit 70 determines the biting state based on the operation amount of the servo motor as the lateral drive mechanism 55 that drives the seal jaws 51 and 52 that sandwich the tubular film Fm during transverse sealing, that is, the number of pulses detected by the encoder 56 (biting measurement value), as a plurality of determination values. FIG. 7 is a flowchart showing the control steps by the control unit 70. FIG. 8 is a diagram for explaining the control by the control unit 70. In FIG. 8, the horizontal axis represents the elapsed time, and the vertical axis represents the biting measurement value (unit: pulse) when the transverse seal is performed.

[0058] The memory unit 71 has, as relatively small values, a first determination value for determining, for example, that the cylindrical film Fm has been bitten (tacked), and, as relatively large values, a second determination value for determining that an article A such as chocolate rather than powder has been bitten. The first determination value and the second determination value are set based on, for example, the average value of the measurement values of the horizontal seal portion X before the normal bag-making operation (during trial operation).

[0059] Note that the determination unit 72 may read the first determination value and the second determination value from the memory unit 71 and correct the first determination value and the second determination value from the moving average value of each horizontal seal portion X during the normal bag-making operation (operation) of the bag-making and packaging machine 100.

[0060] When a relatively large object is bitten when forming the horizontal seal portion X, the torque of the servo motor increases and the number of pulses increases. When a relatively small object is bitten when forming the horizontal seal portion X, the torque of the servo motor decreases and the number of pulses decreases. Therefore, the second determination value for determining that a relatively large object has been bitten is larger than the first determination value for determining that a relatively small object has been bitten.

[0061] As shown in FIG. 7, the determination unit 72 acquires a biting measurement value from the encoder 56 when the horizontal seal portion X is formed (step S1), and determines whether the biting measurement value exceeds the first determination value and the second determination value (steps S2, S5).

[0062] Here, the determination unit 72 determines whether the bite measurement value is greater than the second determination value (step S2). In step S2, when the acquired bite measurement value exceeds the second determination value (time t3 in FIG. 8), the determination unit 72 determines that the item A has been caught, and performs a process of stopping the bag making operation as the second bag making process (step S3). After stopping (step S3), the user can clean the sealing jaws 51, 52, the cutter 61, etc. Then, the bag making operation is resumed by the control unit 70. At this time (time t4 in FIG. 7), the determination unit 72 changes the bag making capacity (step S4). In step S4, the determination unit 72 changes the timing at which the lateral seal portion X is formed by the lateral sealing mechanism 50.

[0063] Note that the determination unit 72 may change the first and second determination values ​​after the bag making operation is resumed. Here, taking into consideration that the tubular film Fm becomes harder due to the stoppage, the first and second determination values ​​are set higher than those before the stoppage.

[0064] Next, the determination unit 72 determines whether the bite measurement value is greater than the first determination value (step S5). In step S5, when the acquired bite measurement value is equal to or less than the second determination value but exceeds the first determination value (times t1, t2, and t5 in FIG. 7), the determination unit 72 determines that a tuck or the like has occurred in the transverse seal portion X, and performs a process of stopping the cutting mechanism 60 from cutting the transverse seal portion X and producing a chain bag in which a plurality of bags B are linked together (step S6) as the first bag making process. After that, the determination unit 72 reduces the bag making capacity based on the setting in the setting unit 73 without stopping the bag making operation (step S7). In step S7, the determination unit 72 sends a command to the weighing machine 2, the conveying mechanism 30, the vertical sealing mechanism 40, the transverse sealing mechanism 50, and the cutting mechanism 60 to reduce the number of bags B produced per minute.

[0065] On the other hand, in step S5, when the acquired jamming measurement value is equal to or less than the first judgment value, judgment unit 72 judges that jamming is not present and continues normal bag making operations (step S8).

[0066] (2-8) Setting section The setting unit 73 sets the bag-making ability. Here, after performing at least one of the first bag-making process and the second bag-making process, the setting unit 73 sets how to change the bag-making ability.

[0067] The setting unit 73 is an operation member that can be input by a user, such as a touch panel. The setting unit 73 of the present embodiment can further set the bag-making operation of the bag-making packaging machine 100, at least two determination values, etc. The setting unit 73 transmits the set information to the control unit 70.

[0068] (3) Operations of the bag-making packaging machine As shown in FIGS. 1 and 2, the sheet-shaped film F supplied from the film supply mechanism 10 is conveyed by the conveying mechanism 30 to the forming mechanism 20. In the forming mechanism 20, the sheet-shaped film F is passed through the gap between the sealer 21 and the tube 22. The sealer 21 folds the sheet-shaped film F into a cylindrical shape, and guides the film F formed into a cylindrical shape by the tube 22.

[0069] On the other hand, the article A weighed by the weighing machine 2 is sequentially dropped onto the upper opening end of the tube 22. At this time, the outer periphery of the tube 22 is covered with a cylindrical film Fm for packaging the article A.

[0070] The cylindrical film Fm formed by the forming mechanism 20 is conveyed downward by the conveying mechanism 30, and the overlapping portion of the cylindrical film Fm is sealed in the vertical direction by the vertical sealing mechanism 40. The cylindrical film Fm with the vertical seal portion Y formed by the vertical sealing mechanism 40 is further conveyed downward by the conveying mechanism 30, and the upper and lower ends of the bag B of the cylindrical film Fm are sealed in the horizontal direction by the horizontal sealing mechanism 50. The bag B with the horizontal seal portion X formed by the horizontal sealing mechanism 50 has the horizontal seal portion X cut in the horizontal direction by the cutter 61 of the cutting mechanism 60, and the bag B is manufactured.

[0071] When the horizontal sealing mechanism 50 performs horizontal sealing, the control unit 70 determines whether or not there is any intrusion in the horizontal sealing part X. When it is determined that there is an intrusion, based on the state of the intrusion, the control unit 70 switches between a first bag-making process related to bag-making and a second bag-making process different from the first bag-making process. The bag B determined by the control unit 70 to have no intrusion in the horizontal sealing part X is regarded as a product. On the other hand, the bag B determined by the control unit 70 to have a small object intruded into the horizontal sealing part X is manufactured as a continuous packaging bag as the first bag-making process and removed as a defective product. Further, the bag B determined by the control unit 70 to have a large object intruded into the horizontal sealing part X has the bag-making operation of the bag-making and packaging machine 100 stopped as the second bag-making process and is removed as a defective product.

[0072] (4) Features (4-1) The bag-making and packaging machine 100 according to the present embodiment is a bag-making and packaging machine that forms a sheet-like film F into a cylindrical shape, performs horizontal sealing, and manufactures a bag in which an article A is accommodated, and includes a horizontal sealing mechanism 50 and a control unit 70. The horizontal sealing mechanism 50 sandwiches and horizontally seals the cylindrically formed cylindrical film Fm to form a horizontal sealing part X. The control unit 70 determines whether or not there is any intrusion in the horizontal sealing part X. When it is determined that there is an intrusion, based on the state of the intrusion, the control unit 70 switches between a first bag-making process related to bag-making and a second bag-making process different from the first bag-making process.

[0073] When a large article A is intruded when forming the horizontal sealing part X, the cylindrical film Fm may be torn and the article A may come out of the cylindrical film Fm and adhere to the seal jaws 51, 52, the cutter 61, etc. In this case, if the production of the bag B is continued, the article A adhering to the seal jaws 51, 52, the cutter 61, etc. will adhere to the bag B to be produced later, resulting in a deterioration in the quality of the bag B. To suppress this, in the present embodiment, the control unit 70 performs a second bag-making process such as stopping to suppress a deterioration in quality due to a large object being intruded into the horizontal sealing part X.

[0074] If there is biting into the horizontal seal portion X and the second bag-making process is always performed, the operation rate will decrease. To suppress this, in the present embodiment, when the influence on the quality of the bag B is small even if it adheres to the seal jaws 51 and 52, the control unit 70 performs the first bag-making process that does not cause a stop or the like in order to suppress a decrease in the operation rate.

[0075] As described above, the bag-making and packaging machine 100 of the present embodiment can perform the first bag-making process for suppressing a decrease in the operation rate and the second bag-making process for suppressing a decrease in quality based on the biting state. Therefore, it is possible to suppress a decrease in the quality of the bag B to be manufactured and also suppress a decrease in the operation rate of the bag-making and packaging machine 100.

[0076] (4-2) Also, in the present embodiment, the control unit 70 switches between the first bag-making process and the second bag-making process based on at least two determination values.

[0077] As described above, the control unit 70 has a plurality of determination values regarding the biting state. Therefore, by setting the determination value when a relatively large object is bitten and the determination value when a relatively small object is bitten, it is possible to easily determine the biting state based on the plurality of determination values.

[0078] Also, by making the determination value small, a small bite can be detected. Therefore, in the present embodiment, the occurrence of a small bite can be detected.

[0079] (4-3) Also, in the present embodiment, it further includes a cutting mechanism 60 for cutting the horizontal seal portion X. The control unit 70 performs, as the first bag-making process, a process of manufacturing a continuous packaging bag in which a plurality of bags B are connected by stopping the cutting of the horizontal seal portion X by the cutting mechanism 60.

[0080] Here, as the biting-in state, when a relatively small object is bitten in, the bag-making operation is not stopped, and continuous packaging bags are manufactured. In this way, in the case of a small bite-in, since the bag-making operation is continued, a decrease in the operating rate can be suppressed. Further, by making the bitten-in bag B into a continuous packaging bag, it can be easily identified as a defective product and removed downstream.

[0081] (4-4) Also, in this embodiment, the control unit 70 performs a process of stopping the bag-making operation as the second bag-making process.

[0082] Here, as the biting-in state, when a relatively large object is bitten in, the bag-making operation is stopped. For this reason, when the article A is bitten in and the article A comes out of the tubular film Fm, the bag-making operation is stopped, so that cleaning of the seal jaws 51, 52, the cutter 61, etc. can be performed. For this reason, it is possible to suppress the adhesion of the article A to the bag B manufactured after the biting-in, and thus it is possible to suppress a decrease in the quality of the bag B to be manufactured.

[0083] (4-5) Also, in this embodiment, at least one of the first bag-making process and the second bag-making process includes a process of changing the bag-making ability.

[0084] Here, after performing the process of manufacturing continuous packaging bags as the first bag-making process and / or after performing the process of stopping the bag-making operation as the second process, a process of automatically changing the bag-making ability is performed. Thereby, the occurrence of biting-in when forming the horizontal seal portion X thereafter can be reduced.

[0085] (5) Variation The following shows a variation of the above embodiment. Note that a part or all of the content of each variation may be combined with the content of the above embodiment and the content of other variations within a range not conflicting with each other.

[0086] (5-1) Variation A In the above-described embodiment, the control unit 70 switches between two types of bag-making processes, i.e., the first bag-making process and the second bag-making process, based on the biting state. However, the present invention is not limited to this, and the control unit of the present invention may switch between three or more different bag-making processes.

[0087] Also, in the above-described embodiment, the control unit 70 switches between the first bag-making process and the second bag-making process based on two determination values. However, the present invention is not limited to this, and the control unit of the present invention may have three or more determination values.

[0088] In this modification, the control unit 70 has a third determination value for performing a third bag-making process different from the first and second bag-making processes. The control unit 70 performs the third bag-making process according to the predetermined third determination value. Here, as the third bag-making process, the control unit 70 manufactures the bag B as a product and performs a process of leaving a history of having had biting.

[0089] Specifically, the third determination value is smaller than the first determination value. The third determination value is set to determine a state in which a bite smaller than the bite determined by the first determination value has been made. When the acquired bite measurement value is equal to or less than the first and second determination values but exceeds the third determination value, the determination unit 72 discharges the bag B as a product without regarding it as a defective product, and stores the history of having had a small bite in the storage unit 71. Note that the determination unit 72 may notify that the value is equal to or greater than the third determination value.

[0090] (5-2) Modification B In the above-described embodiment, the first bag-making process is a process of stopping the cutting of the horizontal seal portion X by the cutting mechanism 60 and manufacturing a continuous packaging bag in which a plurality of bags B are connected, and the second bag-making process is a process of stopping the bag-making operation. However, the present invention is not limited to this. In this modification, the first bag-making process causes a display indicating that the first determination value has been exceeded, and the second bag-making process causes a display indicating that the second determination value has been exceeded.

[0091] FIG. 9 is a block diagram of the bag-making and packaging machine of this modified example. In this modified example, as shown in FIG. 9, the control unit 70 causes the display unit 3 to display that the first determination value has been exceeded as the first bag-making process, and to display that the second determination value has been exceeded as the second bag-making process.

[0092] Specifically, the bag-making and packaging machine 100 further includes the display unit 3 shown in FIG. 1. The display unit 3 is, for example, a touch panel. The display unit 3 may be a member different from the setting unit 73, but in this modified example, it is a common member.

[0093] The display unit 3 sends a command to the display unit 3 to display that the first determination value or the second determination value determined by the determination unit 72 of the control unit 70 has been exceeded. The display unit 3 that has received the command from the determination unit 72 displays a graph as shown in FIG. 8. Specifically, the display unit 3 displays a line graph in which the horizontal axis indicates time and the vertical axis indicates the bite measurement value of each bag B manufactured.

[0094] Note that the determination unit 72 may display an error number, a message, etc. indicating that the first determination value or the second determination value has been exceeded instead of the graph.

[0095] Note that the display unit 3 that causes the control unit 70 to display that the first determination value or the second determination value has been exceeded may be provided in the bag-making and packaging machine 100, or may not be provided in the bag-making and packaging machine 100 and may be another terminal device separate from the bag-making and packaging machine 100.

[0096] As described above, in this modified example, the first bag-making process causes the display unit 3 to display that the first determination value has been exceeded, and the second bag-making process causes the display unit 3 to display that the second determination value has been exceeded. Thereby, different displays can be performed based on the biting state. For this reason, the user can recognize the biting state.

Explanation of Reference Numerals

[0097] 1: Packaging machine 2: Weighing machine 10: Film supply mechanism 20: Forming mechanism 30: Conveyor mechanism 40: Vertical sealing mechanism 50: Horizontal sealing mechanism 60: Cutting mechanism 70: Judgment unit 100: Bag-making and packaging machine A: Article B: Bag F, Fm: Film X: Horizontal seal part Y: Vertical seal part

Prior art documents

Patent documents

[0098]

Patent Document 1

Claims

1. A bag-making and packaging machine that forms a sheet-like film into a tubular shape, performs a horizontal seal, and manufactures a bag containing an article, a horizontal sealing mechanism that sandwiches and horizontally seals the tubular film formed into a tubular shape to form a horizontal seal portion; a cutting mechanism that cuts the horizontal seal portion; a control unit that determines the presence or absence of biting in the horizontal seal portion, and when it is determined that there is biting, based on the state of biting, a first bag-making process related to bag-making, a second bag-making process different from the first bag-making process, and a third bag-making process different from the first bag-making process and the second bag-making process are switched; comprising: the control unit switches the first bag-making process, the second bag-making process, and the third bag-making process based on at least three determination values; as the first bag-making process, the cutting of the horizontal seal portion by the cutting mechanism is stopped, and a process of manufacturing a continuous package bag in which a plurality of bags are connected is performed; as the second bag-making process, a process of stopping the bag-making operation is performed; as the third bag-making process, the bag as a product is manufactured, and a process of leaving a history of biting is performed. Bag-making and packaging machine.

2. At least one of the first bag-making process and the second bag-making process includes a process of changing the bag-making ability. The bag-making and packaging machine according to Claim 1.

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