JP2004219345A - Bag opening sealing part inspection device for packing bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a precise and stable sealing part inspection device by arranging a bag opening sealing part of a packing bag at an accurate position. <P>SOLUTION: The packing bag 1 from a chute 13 of a bagging packer 11 is discharged onto a roller conveyer 14. The bag abuts on a shutter 16 of which the preceding edge part 5 gets in and out into/from a conveying line, and the bag opening sealing part 3 is directed to a direction orthogonal to the flowing direction of the conveying line. Then, the bag is transferred onto a belt conveyer 21, detected by a positioning sensor 22 for the passage thereof, and stopped at a prescribed inspection position. A pressor member 27 and a receiving member 28 are moved, and the sealing part is sandwiched thereby to correct the sealing part to a smooth condition. An electrode brush 31 is made to come down to be in contact with the sealing part including a bag opening edge part 6. A high voltage is impressed between the electrode brush and a grounding plate 33 arranged on the under side of a belt of the belt conveyer. A liquid is leaked from the sealing part when a defective sealing exists, a current flows between both electrodes to be detected with an ampere meter 37. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an inspection apparatus for inspecting the quality of a seal at a sealed bag mouth seal portion of a packaging bag filled with contents. More specifically, a sealed packaging bag is arranged between a pair of electrodes, a high voltage is applied between the two electrodes, a current value flowing between the two electrodes is detected, and thereby the presence or absence of a sealing failure is determined. Related to the device.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, conductive contents, for example, infusions and foods, have been filled and packaged in a packaging bag formed of an insulating material such as a plastic film. After filling the contents, the bag mouth is sealed by welding. As a method of inspecting the sealed portion, a pair of electrodes is arranged at an inspection site, a high voltage is applied thereto, and a current flowing between the electrodes is applied. There is a way to measure
[0003]
By the way, a packaging bag generally used for such packaging does not have rigidity, and the shape of a bag mouth seal portion, which is a portion to be inspected, is not always stably maintained in a constant state. Therefore, even if an electrode is brought close to such an unstable state, accurate inspection cannot be expected. Also, in order to perform an accurate inspection, it is necessary to accurately position and orient the bag at the inspection position, that is, the position and orientation of the inspection target site. Some use trays for this purpose. (See, for example, Patent Document 1).
[0004]
[Patent Document]
Japanese Patent Publication No. 64-2886 (pages 2 to 4, FIG. 1)
[0005]
[Problems to be solved by the invention]
In the invention described in Patent Document 1, a tray on which a package is placed is used. The tray is made of an insulator, provided with a frame for preventing the package from protruding from the tray, and having a shape suitable for receiving the seal of the package (in a specific embodiment, a circular infusion drain). For example, a plurality of electrodes having a circular recess for receiving an outlet are provided. Then, the trays are sequentially transported by transport rollers and inspected at an inspection position. As described above, the tray itself has a complicated configuration, and the tray is used by using a large number of them, so that the structure of the apparatus is inevitably complicated. In addition, it is necessary to perform an operation of properly placing the package on the tray one by one.
[0006]
SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, has a stable and accurate inspection, has a simple structure, has a reduced cost, and has excellent workability during manufacturing and maintenance. Its purpose is to provide a device.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, an inspection device for a bag mouth seal portion of a packaging bag according to the present invention includes a transportation unit that transports the packaging bag, and a packaging bag filled with contents placed at a predetermined inspection position on a transportation line. Positioning means for positioning and stopping; a first electrode disposed in close proximity to the bag mouth seal portion in the inspection position; and a second electrode disposed in close proximity to a predetermined portion of the packaging bag in the inspection position. An electrode, a power supply device for applying a high voltage between the first and second electrodes, current detecting means for detecting a current flowing between the first and second electrodes, and the bag based on a detection result of the current detecting means. In addition to the determining means for determining the quality of the seal of the mouth seal portion, an orientation means for orienting the bag mouth seal portion of the packaging bag in a predetermined direction, and a seal portion correcting means for correcting the bag mouth seal portion to a substantially smooth state. With Thereby, the bag mouth seal is oriented in a predetermined direction at the inspection position, and the bag mouth seal is maintained in a smooth state, so that the bag mouth seal is correct with respect to the electrode, particularly the first electrode. Since they face each other in a smooth state at the position, a reliable and stable inspection can be performed.
[0008]
In one embodiment, the transport means transports the packaging bag while holding the packaging bag in a horizontal state. The directing means includes a guide member which comes in and out of the transport line, contacts one or more edges of the packaging bag transported by the transport means, and directs the packaging bag in a predetermined direction. In this way, the directing means can be constituted by, for example, a plate-like member which enters and exits the transport line, and a configuration is obtained which is simple and can perform the directing reliably.
[0009]
In one embodiment, the positioning means for the packaging bag comprises a sensor for detecting the passage of the packaging bag, and a control means for stopping the conveying means based on a signal from the sensor. As the sensor, a simple known technique such as an optical sensor can be used, whereby a configuration can be obtained with a simple configuration that can reliably position the packaging bag at a predetermined inspection position.
[0010]
In one embodiment, the seal correcting means includes a holding member which is movable so as to come into contact with and separate from each other and holds the packaging bag from both sides at or near the bag mouth seal. Since the holding member itself can adopt a simple structure and can be operated using a cylinder or the like, a structure that can easily and reliably correct the seal portion to a smooth state is obtained.
[0011]
In one embodiment, at least one of the holding members for holding the bag mouth seal portion is formed of a conductive material, and the one holding member constitutes a first electrode. Thus, there is no need to provide a separate first electrode, the configuration is simple, and the cost can be reduced.
[0012]
In one embodiment, the inspection device further includes a pressing means for pressing the bag body storing the contents of the packaging bag at the inspection position, and forcibly leaks the liquid as the contents from the defective sealing portion. To ensure reliable inspection.
[0013]
In still another embodiment, the conveying means grips both side edges of the packaging bag and holds the packaging bag in a suspended state, moves the gripping device along the transport line, and stops at the inspection position. And a moving device. The gripping device is provided so as to be oriented in a predetermined direction with respect to the flow direction of the transport line. This makes it possible to orient the bag mouth seal portion of the packaging bag in a predetermined direction at the inspection position without providing a separate orienting means. In particular, if this inspection position is provided in any step after the bag opening sealing step of the bagging and packaging machine, as an orientation means for gripping both side edges of the packaging bag for performing bagging and packaging. It is possible to use the gripper to be used, and it is possible to use the gripper of the conventional bagging and packaging machine by making a slight change, which is convenient.
[0014]
In one embodiment, the gripping device includes a pair of grippers which can be separated from and separated from each other, and the grippers are located at positions separated from each other to hold the bag mouth seal portion in a substantially smooth state. Thereby, the directing means and the correcting means can be constituted by the same means. Further, the grippers used in the conventional bag-filling and packaging machine can be separated from and separated from each other, and the configuration can be used as it is, which is convenient.
[0015]
In one embodiment, the seal correcting means is provided at the inspection position, holds the packaging bag from both sides at or near the bag mouth seal, and keeps the bag mouth seal in a substantially smooth state. A possible clamping member is provided. A portion of the holding member that contacts at least one of the bags is formed of a conductive material. Thus, this member can be used as the first electrode, and it is not necessary to separately provide the first electrode.
[0016]
In one embodiment, the inspection position is provided in a product discharging step of the bag-filling and packaging machine, and the discharging step is provided with a chute formed of a conductive material and guiding a drop of the packaging bag discharged as a product. Can be Thus, the chute can be used as the second electrode, and there is no need to separately provide a second electrode.
[0017]
In one embodiment, the inspection position is provided in a sealing part cooling step of the bagging and packaging machine. Thereby, a pair of cooling plates that sandwich and cool the bag mouth seal portion can be used as the seal portion correcting means and the first electrode, which is extremely convenient.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. However, the following description is an exemplification, and the scope of the present invention is not limited thereto.
[0019]
FIG. 1 shows a first embodiment. In the figure, reference numeral 1 denotes a packaging bag in which contents are already filled, and a bag body 2 is filled with contents 4 by a bag packing machine 11, and a bag opening which has been opened. It is sealed by welding at the bag mouth seal portion 3 near the edge portion 6. The packaging bag 1 is gripped by the gripper 12 of the packaging machine 11, moved through the processes of filling the contents, sealing the bag mouth, and the like, as is well known, and discharged onto the chute 13 as a finished product.
[0020]
Reference numeral 14 denotes a roller conveyor as a transport device provided adjacent to the discharge end of the discharge chute 13. The packaging bag 1 is placed on the conveyor 14 from the discharge chute 13 and moved to the right in the drawing. In the middle of the route along the conveyor 14, a directional means 15 for orienting the bag mouth edge portion 6 of the packaging bag 1, that is, the bag mouth seal portion 3, in a predetermined direction, in this embodiment, in a direction perpendicular to the paper surface. Is provided. The orienting means 15 includes a plate-shaped orienting shutter 16 and a shutter cylinder 17 for moving the shutter 16 into and out of the transport path of the packaging bag 1.
[0021]
When the bag 1 moved on the conveyor line by the conveyor 14 is moved from the chute 13 onto the conveyor 14, the bag edge 6 is not necessarily oriented perpendicular to the conveyor line, that is, perpendicular to the plane of the drawing. Absent. The bag 1 placed on the conveyor 14 moves on the conveyor 14 with the bag edge 6 as the trailing edge and the opposite edge 5 as the leading edge. 5 corresponds to the shutter 16. Here, the leading edge 5 abuts on the shutter 16 and the bag 1 is temporarily prevented from advancing. Meanwhile, the rollers of the conveyor 14 continue to rotate, whereby the posture of the bag 1 is changed. It is positioned vertically on the transport line. The leading edge portion 5 is formed in the bag making process, and is formed so as to be parallel to the above-described bag opening edge portion 6. Since the bag mouth seal portion 3 is formed parallel to the bag mouth edge 6 as is well known in the sealing process of the bag packing machine 11, when the leading edge 5 is oriented perpendicular to the transport line, the bag The lip 6, ie the bag seal 3, is oriented vertically. Although the attitude of the bag 1 moved from the discharge chute 13 onto the roller conveyor 14 has some variation, all the attitudes can be changed to a desired attitude within a certain time, and the time to be stopped by the shutter 16 is experimentally determined. I can do it. Note that the directing means 15 including the shutter 16 may be provided at an inspection position described later.
[0022]
By the way, the shutter 16 is a guide member for directing the posture of the packaging bag 1 in a fixed direction, but other configurations of the guide member are possible. That is, in the above description, the shutter 16 is arranged so as to extend in a direction crossing the flow direction of the transport line, but it may be arranged to extend along the flow direction of the transport line. That is, one or two guide plates may be arranged so as to abut on one or both side edges of the packaging bag 1. In this case, unlike the case where the packaging bag 1 is temporarily stopped in the case of the shutter 16 described above, the packaging bag 1 is oriented while moving along the transport line without stopping. . Further, the guide plate may be configured to enter and exit the transport line similarly to the shutter 16 described above, but may be a fixed type.
[0023]
When the bag mouth seal portion 3 is oriented in a predetermined direction, the shutter 16 moves backward from the transfer line by the action of the cylinder 17, and the bag 1 resumes the forward movement. Then, it moves from the roller conveyor 14 onto the belt conveyor 21 which also constitutes the conveying means. A control device (not shown) that detects the passage of the leading edge portion 5 or the trailing edge portion 6 by a positioning sensor 22 provided at a predetermined position along the transport line and receives a signal from the sensor 22. After a predetermined time has elapsed, the belt conveyor 21 is stopped, and the packaging bag 1 is stopped at the inspection position. The positioning sensor 22 can be composed of, for example, a light emitting element 23 and a light receiving element 24.
[0024]
Reference numeral 26 denotes a seal correcting means for correcting the bag rim 6, that is, the seal portion 3, to a substantially smooth state. The seal surface pressing member 27 located on the upper side of the bag 1 and the seal receiving member 28 located on the lower side. And These are moved up and down by a seal holding cylinder 29 and a seal receiving cylinder 30, respectively, and sandwich the bag mouth seal portion 3 or the bag mouth edge 6 of the bag 1 from above and below over the entire width thereof, and make this portion substantially smooth. Correct the condition. That is, the bag mouth edge 6 or the bag mouth seal portion 3 may be in a wavy state due to the influence of the sealing operation or various effects during conveyance. It is corrected to a smooth state by sandwiching it from above and below. The seal pressing member 27 is slightly shifted from the seal 3 of the bag 1 toward the main body 7 containing the contents in order to arrange the electrode brush 31 described below adjacently.
[0025]
The electrode brush 31 constitutes a first electrode, is disposed on the upper side of the bag mouth seal portion 3, and moves up and down together with the seal portion pressing member 27 by the cylinder 29. The electrode brush 31 may have a width that covers the entire width of the bag 1, or may have a smaller width in other embodiments so as to be movable in the width direction of the bag 1. In any case, if the sealing of the sealing portion 3 of the bag 1 is defective and the liquid of the content leaks from the sealing portion 3 of the bag 1, the electrode brush 31 comes into contact with the liquid.
[0026]
Reference numeral 33 denotes an earth plate serving as a second electrode, which is disposed below the upper traveling portion of the belt 25 of the belt conveyor 21 at a position close to the main body 7 of the bag 1 and opposed thereto. Note that the belt 25 is formed of an insulating material. The ground plate 33 is grounded via a ground wire 34. The ground plate 33 and the above-mentioned electrode brush are connected by a wiring 35, and a power supply device 36 for applying a high voltage between the two electrodes 31 and 33 is provided in the middle of the wiring 35. An ammeter 37 for measuring a current value is connected in series.
[0027]
Reference numeral 41 denotes a press device, which includes a flat press plate 42 and a press cylinder 43 for moving the press plate 42 up and down. The press plate 42 is pressed from above onto the main body 7 of the bag 1 when inspecting the seal portion, and when the seal of the seal portion 3 is defective, the liquid as the content is actively removed from the defective portion. It acts to make it flow out.
[0028]
In order to inspect the seal portion, first, as described above, the bag 1 is stopped at the illustrated inspection position in a state where the bag mouth seal portion 3, that is, the bag mouth edge 6 is perpendicular to the drawing sheet. Next, the seal portion holding cylinder 29 and the receiving cylinder 30 are operated to be sandwiched between the holding member 27 and the receiving member 28, and the bag mouth seal portion 3 is held in a smooth state. On the other hand, the press cylinder 43 operates to lower the press plate 42 and press the main body 7 of the bag 1 from above. Then, the electrode brush 31 is lowered and brought into contact with the sealing portion 3 of the packaging bag 1. At this time, if the seal of the bag mouth seal part 3 is defective, the liquid of the contents leaks out of the seal part 3 through the defective part, and the electrode brush 31 comes into contact with it. Then, a current flows between the two electrodes 31 and 33 to which the high voltage has been applied, and the current value is measured by the ammeter 37. The current value is sent as a signal to a discriminating means (not shown), and the quality of the seal of the seal portion is discriminated. If it is determined to be defective, it is displayed on display means (not shown) or an alarm device is activated. The packaging bag determined to be defective is removed from the transport line using an extruder (not shown).
[0029]
FIG. 2 is a schematic configuration diagram showing a seal portion inspection device according to the second embodiment. In the above-described first embodiment, after the filling of the contents into the packaging bag 1 and the sealing of the sealing portion 3 are completed and the product is discharged to the discharge chute 13, the product is provided adjacent to the discharge sheet 13. In the second embodiment, the inspection is performed in the discharge step of discharging the product in the bag packaging machine. In this case, the discharge chute is connected to one of the electrodes. It is characterized in that it is used as
[0030]
In FIG. 2, the contents 52 containing the liquid are filled in the main body 52 by the filling and packaging machine 55, the sealing is performed in the bag mouth sealing portion 53 near the bag mouth edge, and the product is moved to the discharging step as a finished product. The packaging bag 51 that has come and stopped is shown. The packaging bag 51 is gripped on both side edges slightly below the bag mouth of the bag 51 by a pair of grippers 56. The gripper 56 is properly stopped at this position, that is, at the discharge position, which is also the inspection position, by a control device (not shown). As is well known, the gripper grips both side edges of the bag 51 supplied from a bag supply device (not shown) at predetermined positions in the height direction, and orients the bag opening seal portion 53 of the bag 51 in a predetermined direction. ing. The pair of grippers 56 can be separated from each other to open and close the bag mouth, and when the filling of the contents is completed and the bag mouth seal portion 53 is sealed, the grippers 56 are moved away from each other. The discharge process, that is, the inspection position, has been moved while the bag mouth seal portion 53 is kept tensioned. That is, the gripper 56 corrects and holds the seal portion of the bag 51 in a smooth state. Since the configuration and operation of the gripper are known, detailed description thereof will be omitted.
[0031]
As described above, most of the gripper 56 can adopt a known configuration as it is, but the gripping claw 57 for gripping is divided into a base 58 and a gripping portion 59 for directly gripping the bag 51, and both are sandwiched between them. The insulators 60 are rigidly connected to each other and are insulated from each other. That is, since the gripper 56 grips the bag 51 filled with the contents, the gripper 56 is made of a rigid metal so as to have strength. However, the insulator 60 is arranged to prevent a current from flowing at the time of an inspection described later. are doing.
[0032]
Reference numeral 61 denotes a discharge chute, which is made of metal. The discharge chute 61 can be moved in the direction indicated by the double arrow in the figure, and after the inspection of the seal portion described later is completed, when the product is discharged and sent out onto a discharge conveyor (not shown), it retreats to the left in the figure, When the next product moves to the inspection position, it moves to the right side, and contacts and holds the lower portion of the bag 51. The discharge chute 61 is grounded by a ground wire 62.
[0033]
Reference numeral 63 denotes an electrode brush as a first electrode, which is located above the bag 51 moved to the inspection position, is moved up and down by a cylinder (not shown), and is lowered during the inspection so that the brush tip comes into contact with the bag mouth of the bag 51. It has become. The electrode brush 63 may have a width equal to or larger than the width of the bag 51, or may be movable in a small width in a direction perpendicular to the plane of the drawing.
[0034]
The electrode brush 63 and the discharge chute 61 are connected by a wiring 64, and a high-voltage power supply 65 and an ammeter 66 are connected in series along the wiring.
[0035]
Reference numeral 67 denotes a press plate, which moves in the left-right direction in FIG. That is, when the bag 51 moves to the inspection position, the bag 51 moves to the left, presses the bag 51 toward the discharge chute 61, and when there is a defect in the bag mouth seal portion 53 of the bag 51, the contents are removed from that portion. The dripping liquid is forcibly leached. When the inspection is completed, the robot moves backward to the right.
[0036]
In the inspection apparatus having the above-described configuration, the sealed bag 51 is gripped by the gripper 56 so that the electrode brush 63 is moved upward, the discharge chute 61 is moved leftward, and the press plate 67 is retracted rightward. Move to inspection and discharge position and stop. Then, the electrode brush 63 moves to the lower side, the discharge chute 61 moves to the right side, and the press plate 67 moves to the left side, and the state shown in the figure is reached. If there is a defect in the seal portion, a current flows between the electrodes 61 and 63, and the current is measured by the ammeter 66.
[0037]
In the second embodiment, the bag 51 is positioned at a predetermined position by a gripper 56 that grips the bag 51, and the bag mouth, that is, the bag mouth sealing portion 53 is oriented in a predetermined direction. Focusing on the fact that the bag mouth seal portion 53 is tensioned and smooth by 56, and that the discharge chute 61 comes into contact with the bag 51, the member conventionally used in the bag packing machine is used as it is. Is available with minor modifications and is very convenient.
[0038]
FIG. 3 is a schematic configuration diagram showing an inspection device according to the third embodiment. In a normal bag filling and packaging machine, in a next step in which contents are filled in a packaging bag and the bag mouth is sealed by welding, the sealed portion is cooled using a cooling plate. In this embodiment, the inspection of the seal portion is also performed in this cooling step.
[0039]
In the figure, reference numeral 71 denotes a packaging bag in which the contents 74 are filled by a bag packaging machine 75, and a predetermined position of the bag mouth portion 73 is welded and sealed with a hot plate (not shown). It is moved while being held by the gripper 76 in the part cooling step, and is in a stopped state. The gripper 76 has the same configuration as that in the second embodiment, and the holding claws 77 include a base 78, a holding portion 79, and an insulating material 80 between the two.
[0040]
Reference numerals 81a and 81b denote a pair of cooling plates for cooling the seal portion welded in the previous step. Cooling of the seal portion by the cooling plate has been conventionally performed and is well-known, so that detailed description thereof will be omitted. Omitted. However, the cooling plates 81a and 81b in this embodiment include a base portion 82, a pressing portion 83 that directly presses and seals the seal portion of the bag 71, and an insulator 84 disposed therebetween, as illustrated. Have. The pressing portion 83 is made of a conductive material. The cooling plates 81a and 81b can be moved toward and away from each other by a cylinder device (not shown).
[0041]
Reference numerals 85a and 85b denote a pair of press devices, each including a press plate 86 disposed on both sides of the main body 72 of the bag 71 and a cylinder 87 for moving the press plate 86 forward and backward.
[0042]
The pressing portion 83 of the cooling plate 81 and the press plate 86 are connected by a wiring 88, and a high-voltage power supply 89 and an ammeter 90 are connected in series on the way.
[0043]
The inspection of the seal portion is performed as follows. That is, the cooling plates 81a and 81b are separated, and the press plates 86a and 86b are also retracted to an inspection position or a cooling position where they stand by, and the gripper 76 grips the bag 71 whose seal is welded and sealed in the previous process. Go and stop. Next, the cooling plates 81a and 81b approach each other to sandwich the seal portion and cool. At this time, the press plates 86a and 86b also move toward each other and press the main body 72 of the bag 71. Therefore, if there is a defect in the seal portion, the liquid as a content leaks from the seal portion, and a current flows between the electrodes 83 and 86, which is measured by the ammeter 90.
[0044]
Although not described in detail in the above embodiments, the sealing process of the normal sealing portion is performed with a predetermined width in the height direction over the entire width in the bag opening direction. Usually, the upper and lower edges are processed so that the seal at the edge farther from the bag mouth is strengthened. Therefore, if the sealing process is insufficient, the content leaks from the rim of the bag, but if the sealing process is too strong, the sealing portion may be cut at the lower edge, in which case the content is Leaks from lower edge. Therefore, it is necessary to determine the shape, arrangement, and the like of the first electrode in each of the above-described embodiments so that the first electrode can also contact the lower edge as necessary. For example, in the first example, the electrode brush 31 is formed so as to have a width sufficient to cover from the bag edge 6 to the lower edge of the seal portion 3. In the second embodiment, the electrode brush 63 is formed. The length of the brush is made sufficiently long, and in the third embodiment, the width of the pressing portion 83 of the cooling plate 81 in the height direction is made sufficiently large.
[0045]
【The invention's effect】
As is clear from the above description, according to the inspection device of the present invention, the packaging bag is correctly positioned at the predetermined inspection position, the bag mouth seal portion is oriented in the predetermined direction, and is maintained in a substantially smooth state. An accurate and stable inspection of the bag mouth seal portion can be performed. The configuration of the inspection apparatus is simpler than the conventional one, and not only can the cost be reduced, but also the workability during cleaning or maintenance is excellent.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram showing an inspection device according to a first embodiment.
FIG. 2 is a schematic configuration diagram illustrating an inspection device according to a second embodiment.
FIG. 3 is a schematic configuration diagram illustrating an inspection device according to a third embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Packaging bag 3 Bag mouth seal part 6 Bag mouth edge part 7 Main body part 11 Bag packing machine 12 Gripper 13 Chute 14 Roller conveyor 15 Directing means 16 Shutter 21 Belt conveyor 22 Positioning sensor 26 Seal part correcting means 27 Seal part pressing member 28 Seal portion receiving member 31 Electrode brush (first electrode)
33 Ground plate (second electrode)
36 Power supply device 37 Ammeter 41 Press device

Claims (17)

Transport means for transporting the packaging bag, positioning means for positioning and stopping the packaging bag filled with the content at a predetermined inspection position on the transport line, and directing the bag mouth seal portion of the packaging bag in a predetermined direction. Attaching means, a seal portion correcting means for correcting the bag mouth seal portion to a substantially smooth state, a first electrode disposed in close proximity to the bag mouth seal portion at the inspection position, and the first electrode at the inspection position. A second electrode disposed close to and opposed to a predetermined portion of the packaging bag, a power supply for applying a high voltage between the first and second electrodes, and a flow between the first and second electrodes A current detecting means for detecting a current, and a judging means for judging whether the seal of the bag mouth seal is good or not based on the detection result of the current detecting means, wherein the bag mouth seal portion of the packaging bag is provided. Inspection equipment. 2. The inspection apparatus for inspecting a bag mouth seal portion of a packaging bag according to claim 1, wherein said transport means transports said packaging bag while holding said packaging bag in a horizontal state. In the bag opening seal inspection device for a packaging bag according to claim 2, the orientation means enters and exits the transport line, abuts one or more edges of the packaging bag, and adjusts the orientation of the packaging bag. A bag mouth seal inspection device for a packaging bag, comprising a guide member for orienting in a predetermined direction. 4. The apparatus according to claim 2, wherein the positioning unit detects the passage of the packaging bag, and controls the transport unit based on a signal from the sensor. 5. And a bag mouth seal inspection device for a packaging bag. 5. The bag mouth seal portion inspection device for a packaging bag according to claim 2, wherein the seal portion correcting means is movable so as to come into contact with and separate from each other, and the seal portion correcting means is provided at or near the bag mouth seal portion. A device for inspecting a bag mouth seal portion of a packaging bag, comprising a clamping member for clamping the packaging bag from both sides. The bag mouth seal inspection device for a packaging bag according to claim 5, wherein at least one of the holding members is formed of a conductive material, and the one holding member constitutes the first electrode. , Inspection device for bag mouth seal part of packaging bag. The bag mouth seal inspection device for a packaging bag according to any one of claims 1 to 6, wherein the inspection device further presses the bag main body containing the contents of the packaging bag at the inspection position. A device for inspecting a bag mouth seal portion of a packaging bag, characterized by comprising means. 2. The apparatus according to claim 1, wherein said transporting means grips both side edges of said packaging bag to hold said packaging bag in a suspended state, and transports said gripping device. And a moving device for moving along the line and stopping at the inspection position. 9. The bag opening seal portion inspection device for a packaging bag according to claim 8, wherein the gripping device is provided in a predetermined direction with respect to a flow direction of the transport line, and the bag opening of the packaging bag at the inspection position. A bag opening seal portion inspection device for a packaging bag, wherein a seal portion is oriented in a predetermined direction. 10. The bag mouth seal inspection apparatus according to claim 9, wherein the gripping device includes a pair of grippers which can be separated from and brought into contact with each other, and the bag mouth seal is provided by the grippers being located at positions separated from each other. For inspecting a bag mouth seal portion of a packaging bag, wherein the device is held in a substantially smooth state. 10. The bag mouth seal inspection apparatus according to claim 9, wherein the correcting means is provided at the inspection position, and holds the packaging bag from both sides at or near the bag mouth seal, thereby forming the bag mouth seal. A bag mouth seal portion inspection device for a packaging bag, comprising a holding member capable of coming into contact with and separating from each other, which maintains the portion in a substantially smooth state. 12. The inspection apparatus according to claim 11, wherein at least one portion of the holding member that comes into contact with the bag is formed of a conductive material, and the portion that makes contact forms the first electrode. A bag mouth seal portion inspection device for packaging bags. 13. The apparatus for inspecting a bag mouth seal portion of a packaging bag according to claim 8, wherein the inspection position is provided in a product discharging step of a bag packing machine, and the discharging step is formed of a conductive material. A chute for guiding the falling of the packaging bag discharged as the product is provided, and the chute constitutes the second electrode. 14. The bag mouth seal portion inspection device for a packaging bag according to any one of claims 8 to 13, wherein the inspection device further presses the bag main body containing the contents of the packaging bag at the inspection position. A device for inspecting a bag mouth seal portion of a packaging bag, characterized by comprising means. The apparatus for inspecting a bag mouth seal portion of a packaging bag according to claim 12, wherein the inspection position is provided in a seal portion cooling step of a bag packing machine, and the holding member cools the bag mouth seal portion. Inspection device for bag mouth seal part of packaging bag, characterized by being constituted by a cooling plate of 16. The apparatus for inspecting a bag mouth seal portion of a packaging bag according to claim 15, further comprising compression means for compressing the bag main body storing the contents of the packaging bag at the inspection position. A contact member for contacting a main body of the packaging bag, wherein the contact member constitutes the second electrode; The bag-mouth sealing portion inspection device for a packaging bag according to any one of claims 8 to 16, wherein the gripping device includes both side edges of the packaging bag during a bag-packing process, a bag-mouth sealing process, and the like in a bag packaging machine. A bag mouth seal portion inspection device for a packaging bag, comprising a gripper for gripping and transferring a portion.

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