Bag-making packaging machine

Abstract

To provide a bag-making packaging machine which can avoid lowering of productivity, even when there is a joint in a film roll.SOLUTION: A bag-making packaging machine 1 includes an imaging part for imaging a film F from other surface Fb side of the film F, and an inspection part 40 for inspecting abnormality of the film F, on the basis of the imaging result of the imaging part, wherein when a joint Fc of a film F of one film roll FR supplying the film F to the bag-making packaging part 3 and other film roll FR joined to the film roll FR is conveyed to the imaging part, after the bag-making packaging operation of the film F in the bag-making packaging part 3 is made to continue a predetermined times regardless of the inspection result of the inspection part 40, the control part 11 makes the bag-making packaging part 3 perform processing different from the bag-making packaging operation on the film F including the joint Fc.SELECTED DRAWING: Figure 1

Description

Technical Field

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

Background Art

[0002] A bag-making packaging machine includes a bag-making and packaging unit that forms a sheet-like film into a tubular shape and seals the tubular film to form a bag shape, and a film supply unit that holds a film roll around which the sheet-like film is wound and sequentially supplies the film fed from the film roll to the bag-making and packaging unit.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a bag-making packaging machine, the film fed from the film roll is imaged, and the presence or absence of abnormalities (such as scratches and holes) is inspected based on the imaging result. In a bag-making packaging machine, if there is an abnormality in the film, the operation of the bag-making packaging machine is temporarily stopped, and a certain amount of film including the abnormal portion is excluded. Therefore, in a bag-making packaging machine, if there is an abnormality in the film, the production efficiency decreases and the film is wasted, resulting in a decrease in productivity.

[0005] In a bag-making packaging machine, when the film roll in the film supply unit runs out, the film roll is replaced. When replacing the film roll, the end of the film roll that supplies the film to the bag-making and packaging unit (hereinafter also referred to as the "used film roll") is joined to the start end of the replacement film roll (hereinafter also referred to as the "replacement film roll"). As a result, a seam is formed at the joint between the end of the used film roll and the start end of the replacement film roll. Although the seam is not an abnormality of the film, it can be determined as an abnormality in the film inspection. Therefore, in the bag-making packaging machine, every time the film roll is replaced, the seam is determined to be an abnormality of the film, resulting in a decrease in productivity.

[0006] One aspect of the present invention aims to provide a bag-making packaging machine that can avoid a decrease in productivity even when there is a seam in the film roll.

Means for Solving the Problems

[0007] (1) The bag-making packaging machine according to one aspect of the present invention performs a bag-making packaging operation of forming individual packaging bags by forming a sheet-like film into a tubular shape and performing sealing in the order of longitudinal sealing by a longitudinal seal portion and transverse sealing by a transverse seal portion on the tubularly formed film, and includes a bag-making and packaging unit, a film supply unit that holds a film roll around which the sheet-like film is wound and supplies the film fed out from the film roll to the bag-making and packaging unit, a film feeding unit that is located between the film supply unit and the bag-making and packaging unit and feeds the film supplied from the film supply unit into the bag-making and packaging unit, and a control unit that controls the operation of the bag-making and packaging unit. The bag-making packaging machine further includes an imaging unit that images the film from the other surface side of the film, and an inspection unit that inspects for abnormalities in the film based on the imaging result of the imaging unit. When the seam between the film of one film roll that supplies the film to the bag-making and packaging unit and the film of the other film roll joined to the film roll is conveyed to the imaging unit, the control unit causes the bag-making and packaging unit to perform a process different from the bag-making packaging operation on the film including the seam after continuously performing the bag-making packaging operation of the film a predetermined number of times in the bag-making and packaging unit regardless of the inspection result of the inspection unit.

[0008] In the bag-making and packaging machine according to one aspect of the present invention, when the seam is conveyed to the imaging unit, the control unit continues the bag-making and packaging operation of the film a predetermined number of times in the bag-making and packaging unit regardless of the inspection result of the inspection unit. As a result, in the bag-making and packaging machine, even when it is determined in the inspection unit that the seam is abnormal, a predetermined number of individual packaging bags are formed by the bag-making and packaging operation for the film on the downstream side of the seam. Therefore, in the bag-making and packaging machine, since the film on the downstream side of the seam can be used without being excluded, it is possible to avoid waste of the film. Further, in the bag-making and packaging machine, after the control unit continues the bag-making and packaging operation a predetermined number of times, the bag-making and packaging unit is made to perform a process different from the bag-making and packaging operation on the film including the seam. In the bag-making and packaging machine, as a process different from the bag-making and packaging operation, for example, the film including the seam is discharged in a form that can be distinguished from the individual packaging bags. Thereby, in the bag-making and packaging machine, the operation of the bag-making and packaging machine can be continued without temporarily stopping it. Therefore, in the bag-making and packaging machine, it is possible to avoid a decrease in production efficiency. In this way, in the bag-making and packaging machine, it is possible to avoid waste of the film and to avoid a decrease in production efficiency. Therefore, even when there is a seam in the film, it is possible to avoid a decrease in productivity.

[0009] (2) In the bag-making and packaging machine of (1) above, when the inspection unit detects an abnormality exceeding a predetermined range in the imaging result, the inspection location may be determined as a seam. In this configuration, the position of the seam can be specified.

[0010] (3) The bag-making and packaging machine of (1) or (2) above may be provided with a sensor for detecting a seam. In this configuration, the position of the seam can be detected.

[0011] (4) The bag-making and packaging machine of any one of (1) to (3) above may include a measuring unit for measuring the distance of the conveyed film. In this configuration, based on the distance of the film measured by the measuring unit and the length of the film wound around the film roll, the position of the seam can be specified.

Advantages of the Invention

[0012] According to one aspect of the present invention, even when there is a seam in the film roll, it is possible to avoid a decrease in productivity.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Figure 3

Embodiments for Carrying Out the Invention

[0014] Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail. In the description of the drawings, the same or corresponding elements are denoted by the same reference numerals, and redundant descriptions are omitted. In the following description, in order to represent directions, "front", "rear", "upper", "lower", "left", "right", etc. may be used. In the present embodiment, "front", "rear", "upper", "lower", "left", "right" are defined by the directions of the arrows attached to the drawings.

[0015] As shown in FIG. 1, the bag-making and packaging machine 1 is a device for producing a bag (individual packaging bag) B in which an article C supplied from a combination weighing device (not shown) or the like is accommodated. As shown in FIG. 1 or FIG. 2, the bag-making and packaging machine 1 includes a bag-making and packaging unit 3, a film supply unit 5, a film feeding unit 7, a film inspection unit 9, a control unit 11, a storage unit 12, and an operation unit 13.

[0016] [Bag-making and Packaging Unit] The bag-making and packaging unit 3 forms the sheet-like film F into a tubular shape and seals the tubular-shaped film F to form a bag shape. The bag-making and packaging unit 3 includes a former unit 4, a pair of film conveying belts 6, a longitudinal sealing mechanism (longitudinal sealing portion) 8, and a transverse sealing mechanism (transverse sealing portion) 10. In FIG. 1, one of the pair of film conveying belts 6 is shown.

[0017] The former unit 4 includes a tube 15 and a former body 17. The tube 15 is a cylindrical member that extends in the vertical direction and has open upper and lower ends. The tube 15 receives the article C supplied from the combined weighing device through the upper opening. The tube 15 supplies the article C inside the tubular film Ft. The former body 17 bends the sheet-like film F drawn from the film roll FR and conveyed to the former body 17 so that the left and right ends of the film F overlap to form a tubular shape. The tubular film Ft formed by the former body 17 is guided to wrap around the outer peripheral surface of the lower side of the tube 15 and is conveyed downward in a state of being wound around the tube 15.

[0018] The pair of film conveying belts 6 are disposed below the former unit 4. The pair of film conveying belts 6 are respectively disposed on the left and right sides of the tube 15 of the former unit 4 around which the tubular film Ft is wound. The pair of film conveying belts 6 convey the film F drawn from the film roll FR to the former body 17. The film conveying belt 6 conveys the tubular film Ft formed by the former body 17 to the transverse sealing mechanism 10. The film conveying belt 6 adsorbs the tubular film Ft wound around the tube 15 and conveys it downward.

[0019] The longitudinal sealing mechanism 8 is a mechanism that longitudinally seals (seals in the vertical direction) the overlapping portion of the tubular film Ft wound around the tube 15. The longitudinal sealing mechanism 8 includes a heater (not shown), a heater belt (not shown) that contacts the overlapping portion of the tubular film Ft, and a drive mechanism (not shown) that drives the heater belt. The heater heats the heater belt. The drive mechanism drives the heater belt in the front-rear direction so that the heater belt approaches the tube 15 or moves away from the tube 15. The longitudinal sealing mechanism 8 thermally seals the overlapping portion of the tubular film Ft in the longitudinal direction by pressing the heated heater belt against the overlapping portion of the tubular film Ft against the tube 15 with a predetermined pressure. The longitudinal sealing mechanism 8 may seal the tubular film Ft with a heater block in addition to the heater belt.

[0020] The transverse sealing mechanism 10 is a mechanism that transversely seals the tubular film Ft after longitudinal sealing by the longitudinal sealing mechanism 8, which is conveyed downward by the film conveying belt 6. The transverse sealing mechanism 10 has a cutter (not shown). The cutter cuts the transverse sealing portion of the tubular film Ft at the central position in the conveying direction of the tubular film Ft, separating the bag B from the subsequent tubular film Ft.

[0021] With the above configuration, the bag-making and packaging unit 3 forms the sheet-like film F into a tubular shape and performs a bag-making and packaging operation of forming the bag B by sequentially performing longitudinal sealing by the longitudinal sealing mechanism 8 and transverse sealing by the transverse sealing mechanism 10 on the tubular film Ft formed into a tubular shape.

[0022] [Film supply unit] The film supply unit 5 holds the film roll FR around which the sheet-like film F is wound and sequentially supplies the film F fed out from the film roll FR to the film feeding unit 7 (bag-making and packaging unit 3). The film F supplied from the film supply unit 5 is guided by the roller 24A arranged along the conveyance path of the film F and conveyed to the film feeding unit 7.

[0023] The film supply unit 5 includes a film roll support mechanism 23 and a joining part (not shown). The film roll support mechanism 23 has a first film roll support part 23A, a second film roll support part 23B, a support frame 23C, and a pay-out mechanism (not shown).

[0024] The first film roll support part 23A and the second film roll support part 23B rotatably support the film roll FR. The film roll FR is mounted (inserted) on the first film roll support part 23A and the second film roll support part 23B. In the example shown in FIG. 1, a film roll FR (hereinafter, also referred to as "used film roll FR") that supplies the film F to the bag-making and packaging unit 3 is mounted on the first film roll support part 23A, and a replacement film roll FR (hereinafter, also referred to as "replacement film roll FR") is mounted on the second film roll support part 23B.

[0025] The support frame 23C supports the first film roll support part 23A and the second film roll support part 23B. The support frame 23C is provided rotatably. The support frame 23C rotates by a drive part (not shown). Due to the rotation of the support frame 23C, the first film roll support part 23A and the second film roll support part 23B rotate (swing).

[0026] The pay-out mechanism rotates each of the first film roll support part 23A and the second film roll support part 23B to pay out the film F from the film roll FR.

[0027] The joint joins the end of the used film roll FR that supplies the film F to the bag-making and packaging unit 3 and the start of the replacement film roll FR. In the present embodiment, the joint 25 joins the end of the film F wound around the used film roll FR supported by the first film roll support portion 23A (hereinafter also referred to as the "first film F") and the start of the film F wound around the replacement film roll FR supported by the second film roll support portion 23B (hereinafter also referred to as the "second film F"). Here, the start and end portions of the film F mean portions including a predetermined length from the ends (start end, end) of the film F.

[0028] The joint heats the first film F and the second film F with a heater (not shown) in a state where they are pressurized, and thermally welds the first film F and the second film F. The joining method is not limited to thermal welding, and the first film F and the second film F may be joined by ultrasonic welding. In the film F, a seam Fc is formed at the portion joined by the joint.

[0029] [Film feeding section] The film feeding section 7 is located between the bag-making and packaging unit 3 and the film supply section 5. The film feeding section 7 feeds the film F supplied from the film supply section 5 into the bag-making and packaging unit 3. The film feeding section 7 has a plurality of rollers 24B, 24C, 24D, 24E, 24F, 24G, 24H, 24I arranged along the conveyance path of the film F. The rollers 24E and 24F constitute a tension adjustment mechanism. In the tension adjustment mechanism, a force is applied to the film F by the roller 24E, and the tension of the conveyed film F is adjusted. The roller 24C is arranged above the rollers 24B and 24D. The roller 24H is arranged above the rollers 24G and 24I.

[0030] [Film inspection unit] The film inspection unit 9 inspects for abnormalities in the film F. Abnormalities include cases where the film F has holes, or the film thickness is thin, etc. As shown in FIG. 2, the film inspection unit 9 includes an irradiation unit 32, a first camera (imaging unit) 34A and a second camera (imaging unit) 34B, an encoder (measurement unit) 36, a sensor 38, and an inspection unit 40.

[0031] The irradiation unit 32 irradiates light onto one surface Fa of the film F located at the film feeding unit 7. The irradiation unit 32 is, for example, an LED illumination. The irradiation unit 32 is disposed, for example, below the roller 24E and irradiates light onto the surface Fa of the film F. The irradiation unit 32 irradiates light over the entire width direction of the film F on the surface Fa of the film F. The irradiation unit 32 may extend along the width direction (the depth direction of the paper surface in FIG. 1) of the film F, or a plurality of irradiation portions may be arranged side by side in the width direction.

[0032] The first camera 34A and the second camera 34B image the film F. The first camera 34A and the second camera 34B image the film F from the other surface Fb side of the film F. The first camera 34A and the second camera 34B are, for example, line sensor type cameras. The first camera 34A and the second camera 34B are disposed at positions facing the irradiation unit 32.

[0033] The first camera 34A and the second camera 34B are arranged at a predetermined interval in the width direction of the film F. Specifically, for example, the first camera 34A is disposed on the front side in the depth direction of the paper surface in FIG. 1, and the second camera 34B is disposed on the back side in the depth direction of the paper surface in FIG. 1. The first camera 34A images a region on one side in the width direction (the left side when viewing the film F from the surface Fb side) of the film F. The second camera 34B images a region on the other side in the width direction (the right side when viewing the film F from the surface Fb side) of the film F. The imaging regions of the first camera 34A and the second camera 34B may partially overlap. The first camera 34A and the second camera 34B output the captured imaging data to the inspection unit 40.

[0034] The encoder 36 measures the distance of the film F being conveyed. The encoder 36 is disposed at a position sandwiching the roller 24E and the film F. The encoder 36 contacts the film F to measure the distance (conveyance amount) of the film F. The encoder 36 outputs measurement data to the inspection unit 40.

[0035] The sensor 38 detects the seam Fc of the film F. The sensor 38 is, for example, an optical sensor. The sensor 38 is disposed upstream of the conveyance path of the film F from the positions where the first camera 34A and the second camera 34B image. When the seam Fc of the film F passes through the detection area of the sensor 38, the sensor 38 detects the seam Fc. The sensor 38 outputs the detection result to the inspection unit 40.

[0036] The inspection unit 40 inspects for abnormalities in the film F. The inspection unit 40 is composed of a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), etc. The inspection unit 40 inspects for abnormalities in the film F based on the imaging results of the first camera 34A and the second camera 34B. That is, the inspection unit 40 inspects for abnormalities in the film F based on the imaging data output from the first camera 34A and the second camera 34B.

[0037] When there are pixels brighter than a predetermined threshold in the imaging data, the inspection unit 40 determines that there is an abnormality in the film F. The predetermined threshold is set based on the characteristics (thickness, material, etc.) of the film F. The predetermined threshold is set at the operation unit 13. The inspection unit 40 outputs the inspection result in units of the bag B. Specifically, the inspection unit 40 performs inspection in units of the bag B based on the measurement data (conveyance amount of the film F) output from the encoder 36 and the size (length) of the bag B. The inspection unit 40 outputs the inspection result (judgment result) to the control unit 11.

[0038] [Control Unit] The control unit 11 controls the operation of the bag-making and packaging machine 1. The control unit 11 is composed of a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like.

[0039] When the inspection unit 40 detects an abnormality in the film F as a result of the inspection, the control unit 11 stops all or part of the bag-making and packaging operation of the bag-making and packaging unit 3, and conveys the portion with the abnormality in the film F to the downstream side of the conveyance path from the horizontal sealing mechanism 10. Stopping all of the bag-making and packaging operation means, for example, stopping both the longitudinal sealing by the longitudinal sealing mechanism 8 and the horizontal sealing by the horizontal sealing mechanism 10. Stopping part of the bag-making and packaging operation means, for example, stopping either the longitudinal sealing by the longitudinal sealing mechanism 8 or the horizontal sealing by the horizontal sealing mechanism 10. By stopping all or part of the bag-making and packaging operation, the film F including the portion with the abnormality is discharged in a form different from the bag B. The bag-making and packaging operation at the time of abnormality occurrence in the control unit 11 is set at the operation unit 13.

[0040] When it is determined that there is an abnormality in the film F, the control unit 11 does not perform all or part of the bag-making and packaging operation in the portion downstream of the portion with the abnormality. The control unit 11 does not perform all or part of the bag-making and packaging operation on a film of a predetermined length including the portion with the abnormality, and conveys it to the downstream side of the conveyance path from the horizontal sealing mechanism 10. The predetermined length includes the portion upstream of the portion with the abnormality in the film F. For example, the predetermined length may include a length corresponding to at least the length of one bag B upstream of the portion with the abnormality. The control unit 11 conveys the film F of the predetermined length to the downstream side of the conveyance path from the horizontal sealing mechanism 10 based on the measurement data of the encoder 36.

[0041] When the control unit 11 conveys a portion with an abnormality in the film F downstream of the conveyance path from the horizontal sealing mechanism 10, the film F may be cut by a cutter (not shown) of the horizontal sealing mechanism 10. In this case, after the control unit 11 cuts the film F by the cutter (not shown) of the horizontal sealing mechanism 10, the normal bag-making and packaging operation may be automatically restarted, or the normal bag-making and packaging operation may be automatically restarted when a predetermined operation is performed on the operation unit 13.

[0042] Also, when the control unit 11 conveys a portion with an abnormality in the film F downstream of the conveyance path from the horizontal sealing mechanism 10, it may display that there is an abnormality in the operation unit 13 and stop the bag-making and packaging operation. In this case, after a predetermined process (such as confirmation by an operator) is performed on the film F, the control unit 11 may restart the normal bag-making and packaging operation when a predetermined operation is performed on the operation unit 13.

[0043] When the seam Fc of the film F is conveyed to the first camera 34A and the second camera 34B, the control unit 11 causes the bag-making and packaging unit 3 to perform a process different from the bag-making and packaging operation on the film F including the seam Fc after continuing the bag-making and packaging operation of the film F a predetermined number of times regardless of the inspection result of the inspection unit 40. That is, when the seam Fc of the film F is conveyed to the first camera 34A and the second camera 34B, the control unit 11 causes the bag-making and packaging unit 3 to perform a process different from the bag-making and packaging operation on the film F including the seam Fc after continuing the bag-making and packaging operation of the film F a predetermined number of times in any case where it is determined that there is an abnormality in the film F in the inspection result of the inspection unit 40 and in any case where it is not determined that there is an abnormality in the film F in the inspection result of the inspection unit 40.

[0044] The control unit 11 performs the above processing based on the length of the film F between the first camera 34A and the second camera 34B and the sensor 38, the measurement data of the encoder 36, the detection result of the sensor 38, and the inspection result of the inspection unit 40. Specifically, when it is determined in the result of the inspection unit 40 that there is an abnormality in the film F, if the seam Fc is detected by the sensor 38, and the measurement data of the encoder 36 is equal to the length of the film F between the first camera 34A, the second camera 34B, and the sensor 38, the control unit 11 performs the above processing assuming that the portion determined to be abnormal in the inspection unit 40 is the seam Fc.

[0045] The predetermined number of times is set based on the number of formed items stored in the storage unit 12. Specifically, when the number of formed items (described later) is "N", the predetermined number of times is "N - 1". That is, the predetermined number of times is the number of times obtained by subtracting 1 from the number of formed items. Specifically, for example, when the number of formed items is "5", the predetermined number of times is "4". The predetermined number of times corresponds to the number of bags B that can be formed by the film F without abnormalities.

[0046] Processing different from the bag-making and packaging operation is the stop of all or part of the bag-making and packaging operation, the formation of a bag having a length for a plurality of bags B, or the formation of an empty bag. That is, the processing different from the bag-making and packaging operation is for discharging the film F in a form distinguishable from a normal bag B. The bag having a length for a plurality of bags B may be, for example, a triple bag BA in which three bags B are connected as shown in FIG. 3. Also, the bag having a length for a plurality of bags B may have a length for three bags B and may be a bag without a horizontal seal.

[0047] [Storage unit] The storage unit 12 stores the number of bags B (hereinafter also referred to as "formed number") formed between the position imaged by the first camera 34A and the second camera 34B and the position where it is laterally sealed and discharged by the lateral sealing mechanism 10, corresponding to the size of the bag B. That is, for each type of bag B, the formed number is associated with the storage unit 12. The data stored in the storage unit 12 may be set (input) by the operation unit 13, may be acquired via a network, or may be acquired via a storage medium.

[0048] [Operation unit] The operation unit 13 performs operations related to the bag-making and packaging machine 1. The operation unit 13 may have an input unit and a display unit. The input unit and the display unit may be a touch panel display. The operation unit 13 is communicably connected to the control unit 11 wirelessly or by wire. The operation unit 13 may be a device connected to the control unit 11 via a network.

[0049] The operation unit 13 sets the discharge form of the film F when there is an abnormality in the film F. That is, the operation unit 13 sets the bag-making and packaging operation to be performed on the film F when there is an abnormality in the film F. In addition, the operation unit 13 sets a process different from the bag-making and packaging operation. That is, the operation unit 13 sets a process different from the bag-making and packaging operation to be performed on the film F including the seam Fc.

[0050] As described above, in the bag-making and packaging machine 1 according to the present embodiment, when the seam Fc is conveyed to the first camera 34A and the second camera 34B, the control unit 11 continues the bag-making and packaging operation of the film F a predetermined number of times in the bag-making and packaging unit 3 regardless of the inspection result of the inspection unit 40. As a result, in the bag-making and packaging machine 1, even when it is determined in the inspection unit 40 that the seam Fc is abnormal, a predetermined number of bags B are formed by the bag-making and packaging operation for the film F on the downstream side of the seam Fc. Therefore, in the bag-making and packaging machine 1, the film F on the downstream side of the seam Fc can be used without being excluded, so that waste of the film F can be avoided.

[0051] In addition, in the bag-making and packaging machine 1, after the bag-making and packaging operation is continued a predetermined number of times, the control unit 11 causes the bag-making and packaging unit 3 to perform a process different from the bag-making and packaging operation on the film F including the seam Fc. In the bag-making and packaging machine 1, as a process different from the bag-making and packaging operation, for example, the film F including the seam Fc is discharged in a form that can be distinguished from the bag B. Thereby, in the bag-making and packaging machine 1, the operation of the bag-making and packaging machine 1 can be continued without temporarily stopping it. Therefore, in the bag-making and packaging machine 1, it is possible to avoid a decrease in production efficiency. In this way, in the bag-making and packaging machine 1, it is possible to avoid waste of the film F and to avoid a decrease in production efficiency. Therefore, even when there is a seam Fc in the film F, it is possible to avoid a decrease in productivity.

[0052] As described above, the embodiments of the present invention have been described. However, the present invention is not necessarily limited to the above-described embodiments, and various modifications are possible without departing from the gist thereof.

[0053] In the above embodiment, the form in which the irradiation unit 32 is an LED illumination has been described as an example. However, the irradiation unit may be in other forms (for example, a fluorescent lamp or the like).

[0054] In the above embodiment, the form in which the first camera 34A and the second camera 34B are line sensor type cameras has been described as an example. However, the first camera 34A and the second camera 34B may be other cameras.

[0055] In the above embodiment, the form in which the imaging unit includes two cameras, the first camera 34A and the second camera 34B, has been described as an example. However, the number of cameras may be one, or may be three or more.

[0056] The positions of the irradiation unit 32, the first camera 34A, and the second camera 34B can be changed as appropriate.

[0057] In the above-described embodiment, an example of a form including the sensor 38 that detects the seam Fc of the film F was described. However, the seam Fc may be obtained (specified) by other methods. For example, the seam Fc may be specified by the inspection unit 40. When the inspection unit 40 detects an abnormality exceeding a predetermined range in the imaging results of the first camera 34A and the second camera 34B, the inspection location may be determined as the seam Fc. The predetermined range is an arbitrarily set range, and for example, it is set to a range wider (larger) than the assumed abnormalities (holes, scratches, etc.).

[0058] Further, the control unit 11 may specify the seam Fc based on the measurement data of the encoder 36. The control unit 11 specifies the position of the seam Fc based on the length of the film F wound around the film roll FR and the measurement data of the encoder 36. The bag-making and packaging machine 1 only needs to have a function (seam specifying unit) for specifying the seam Fc of the film F.

[0059] In the above-described embodiment, an example of a form in which the bag-making and packaging machine 1 includes the storage unit 12 and sets a predetermined number of times based on the number of formed products stored in the storage unit 12 was described. However, the bag-making and packaging machine 1 may not include the storage unit 12. In this configuration, the predetermined number of times may be obtained based on the size of the bag B and the measurement data of the encoder 36.

[0060] In the above-described embodiment, an example of a form in which the film inspection unit 9 includes the encoder 36 was described. However, the encoder 36 may not be included. In this case, for example, the number of pulses of the motor that drives the roller that conveys the film F may be counted to obtain the distance of the film F.

Explanation of Reference Numerals

[0061] 1... Bag-making packaging machine, 3... Bag-making packaging section, 5... Film supply section, 7... Film feeding section (bag-making packaging section 3), 8... Longitudinal sealing mechanism (longitudinal sealing section), 10... Transverse sealing mechanism (transverse sealing section), 11... Control section, 34A... First camera (imaging section), 34B... Second camera (imaging section), 36... Encoder (measurement section), 38... Sensor, 40... Inspection section, B... Bag (individual packaging bag), F... Film, Fb... The other side, Fc... Seam, FR... Film roll.

Claims

1. A bag-making and packaging unit that performs a bag-making and packaging operation of forming a sheet-like film into a cylindrical shape and performing sealing in the order of longitudinal sealing by a longitudinal seal portion and transverse sealing by a transverse seal portion on the cylindrically formed film to form individual packaging bags; A film supply unit that holds a film roll around which the sheet-like film is wound and supplies the film fed out from the film roll to the bag-making and packaging unit; A film feeding unit that is located between the film supply unit and the bag-making and packaging unit and feeds the film supplied from the film supply unit into the bag-making and packaging unit; A bag-making and packaging machine comprising a control unit that controls the operation of the bag-making and packaging unit, An imaging unit that images the film from the other surface side of the film; An inspection unit that inspects for abnormalities in the film based on the imaging result of the imaging unit, The control unit, when the seam between one film roll that supplies the film to the bag-making and packaging unit and the film of another film roll joined to the film roll is conveyed to the imaging unit, causes the bag-making and packaging unit to perform a process different from the bag-making and packaging operation on the film including the seam after continuously performing the bag-making and packaging operation of the film a predetermined number of times in the bag-making and packaging unit regardless of the inspection result of the inspection unit. A bag-making and packaging machine.

2. The bag-making and packaging machine according to claim 1, wherein the inspection unit determines the inspection location as the seam when detecting an abnormality exceeding a predetermined range in the imaging result.

3. The bag-making and packaging machine according to claim 1 or 2, comprising a sensor that detects the seam.

4. The bag-making and packaging machine according to claim 1 or 2, including a measuring unit that measures the distance of the conveyed film.

Images