Bag inspection device and inspection method

Abstract

To provide a bag inspection device capable of selecting a bag with no risk of a liquid leakage as much as possible when filled with a liquid content.SOLUTION: An inspection method for a bag 10 produced by applying a side seal 16 and a bottom seal 18 with a folded bottom part sheet 14 sandwiched between a pair of body part sheets 12a and 12b, comprising: the bag inspection device is characterized by having a seal position inspection means for inspecting whether the positions of the side seal 16 and the bottom seal 18 are proper, and a bottom part sheet position inspection means for inspecting whether the position of the bottom part sheet 14 is proper.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a bag inspection device and a bag inspection method, and more particularly to an inspection device and a method for inspecting free-standing bags that are made by sealing a pair of body sheets with a bottom sheet folded in half sandwiched between them. [Background technology]

[0002] Many inspection devices have been developed to check whether bags, which are made by sealing a pair of body sheets with a folded bottom sheet sandwiched in half, are properly made. For example, Patent Document 1 shows one such device. Patent Document 1 proposes an inspection device that measures the difference in position between the reference position and the hole at the time of sealing by forming an index hole at the same time as the side and bottom sealing, in order to address the problem of the sheet flapping or shifting due to insufficient tension being applied to the sheet during continuous bag production, which causes the position of the heat-sealed part to shift and also shifts the position of the printed image. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2017-218207 Summary of the Invention [Problem to be solved by the invention]

[0004] However, even if the positions of the side seal and bottom seal are measured and inspected, and bags with appropriate seal positions are selected and manufactured, there are cases where liquid leakage occurs when liquid contents are filled inside the bags. Therefore, the object of the present invention is to provide a bag inspection device and inspection method that can select bags that are produced by sealing a pair of body sheets with a folded bottom sheet sandwiched in half, and that are unlikely to leak when filled with liquid contents, as much as possible. [Means for solving the problem]

[0005] The inventors investigated the cause of the liquid leakage and discovered that the liquid leakage occurred at the boundary between the body sheet and the bottom sheet in the side seal, i.e., at the position where there is a step at the fold line of the bottom sheet.They discovered that even if the seal is applied in the correct position, liquid leakage can occur if the bottom sheet is sealed slightly off-position, which led to the invention.

[0006] That is, according to the present invention, as a means for solving the above problems, (1) The bottom sheet folded in half is sandwiched between a pair of body sheets, and the side seals and An inspection device for bags manufactured by applying a side seal and a bottom seal, a photographing means for photographing the inspection points of the Tom seal and the bottom sheet; Based on the image, it is inspected whether the positions of the side seal and the bottom seal are correct. The position of the bottom sheet is determined based on the image captured by the image capturing means. Bottom sheet position inspection means for checking whether it is correct or not and Preparation The seal position inspection means comprises seal position detection means for detecting the positions of the side seals and the bottom seal, and seal position determination means for determining whether the positions of the side seals and the bottom seal fall within a predetermined appropriate range in terms of their positional relationship with a reference position set on the body sheet, and the bottom sheet position inspection means comprises bottom sheet position detection means for detecting the position of a fold line of the bottom sheet, and bottom sheet position determination means for determining whether the fold line of the bottom sheet falls within a predetermined appropriate range in terms of its positional relationship with a reference position set on the body sheet. A bag inspection device is provided, which is characterized by: (2) The bottom sheet folded in half is sandwiched between a pair of body sheets, and the side seals and The bottom sheet is sandwiched between the side seals, and the bottom seal is attached to the side seal. The pair of body sheets have a portion where they are directly sealed together by punch holes provided in the body. a bag inspection device for inspecting a bag, the bag inspection device comprising: a photographing means for photographing the inspection point of the punch hole, and a a seal position inspection means for inspecting whether the positions of the side seal and the bottom seal are correct; and inspecting whether the position of the bottom sheet is proper or not based on the image taken by the photographing means. and a bottom sheet position inspection means for detecting the positions of the punch holes based on the image taken by the photographing means. Punch hole position inspection means to check whether the position is correct and Preparation The seal position inspection means a seal position detection means for detecting the positions of the side seals and the bottom seal, and a seal position determination means for determining whether the positions of the side seals and the bottom seal are within a predetermined appropriate range in terms of their positional relationship with a reference position set on the body sheet, before The bottom sheet position inspection means comprises a bottom sheet position detection means for detecting the position of the fold line of the bottom sheet, and a bottom sheet position determination means for determining whether the fold line of the bottom sheet falls within a predetermined appropriate range in positional relationship with a reference position set on the body sheet, and the punch hole position inspection means comprises a punch hole position detection means for detecting the position of the center of gravity γ of the punch hole, and a punch hole position determination means for determining whether the position of the center of gravity γ of the punch hole falls within a predetermined appropriate range in positional relationship with the reference position set on the body sheet. A bag inspection device is provided, which is characterized by: (3) The position detection of the side seal by the seal position detection means is performed by The boundary lines on both sides of the line are detected, and the center line of the boundary lines on both sides is calculated to detect the position. Sign (1) or (2) A bag inspection device is provided, (4) The seal position detecting means detects the position of the bottom seal by detecting the position of the bottom seal. The contour of the unsealed portion in the tube is detected, and the center of gravity of the unsealed portion is calculated to detect its position. Characterized by (1) or (2) A bag inspection device is provided, (5) The seal position inspection means inspects the intersection of the seal portions of the side seal and the bottom seal. The bag inspection device (1) or (2) is provided, which is characterized by detecting the position from α. .

[0007] (6) A method for inspecting bags that are made by applying side seals and bottom seals while a bottom sheet folded in half is sandwiched between a pair of body sheets, the method comprising: an imaging step of photographing inspection points of the side seals, the bottom seal, and the bottom sheet by an imaging means; a seal position inspection step of inspecting whether the positions of the side seals and the bottom seal are appropriate based on the images photographed by the imaging step; and a bottom sheet position inspection step of inspecting whether the position of the bottom sheet is appropriate based on the images photographed by the imaging step. The seal position inspection step is performed by inspecting whether the position of the side seals is appropriate based on the images photographed by the imaging step. a seal position detection step for detecting the positions of the side seals and the bottom seal, and a seal position determination step for determining whether the positions of the side seals and the bottom seal are within a predetermined appropriate range in terms of their positional relationship with a reference position set on the body sheet, wherein the bottom sheet position inspection step comprises a bottom sheet position detection step for detecting the position of the fold line of the bottom sheet, and a bottom sheet position determination step for determining whether the fold line of the bottom sheet is within a predetermined appropriate range in terms of its positional relationship with a reference position set on the body sheet.

[0008] (7) A pair of body sheets is sandwiched between them, and side seals and bottom seals are applied to the bottom sheet folded in half. The side seals at the sandwiched portion of the bottom sheet seal the bottom sheet. The pair of body sheets have a portion where they are directly sealed together by punch holes formed in the A bag inspection method comprising: an imaging step of photographing inspection points for the side seals, the bottom seal, the bottom sheet, and the punch holes by an imaging means; a seal position inspection step of inspecting whether the positions of the side seals and the bottom seal are correct based on the images photographed in the imaging step; a bottom sheet position inspection step of inspecting whether the position of the bottom sheet is correct based on the images photographed in the imaging step; and a punch hole position inspection step of inspecting whether the positions of the punch holes are correct based on the images photographed in the imaging step, wherein the seal position inspection step includes a seal position detection step of detecting the positions of the side seals and the bottom seal; a seal position determination step for determining whether the position of the fold line of the bottom sheet falls within a predetermined appropriate range in positional relationship with a reference position set on the body sheet; and the bottom sheet position inspection step for detecting the position of the fold line of the bottom sheet, and a bottom sheet position determination step for determining whether the fold line of the bottom sheet falls within a predetermined appropriate range in positional relationship with a reference position set on the body sheet; and the punch hole position inspection step for detecting the position of the center of gravity γ of the punch hole, and a punch hole position determination step for determining whether the position of the center of gravity γ of the punch hole falls within a predetermined appropriate range in positional relationship with the reference position set on the body sheet. [Effects of the Invention]

[0009] The bag inspection device and bag inspection method of the present invention can accurately inspect bags to prevent liquid leakage even when liquid contents are placed in the bags. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a perspective view showing a bag according to one embodiment. [Figure 2] FIG. 2 is a schematic diagram showing one embodiment of a continuous bag making machine according to the present invention. [Figure 3] FIG. 3 is a partially enlarged plan view showing one embodiment of the bag manufacturing process in the inspection step C of FIG. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. However, the present invention is not limited to the following, and various embodiments can be adopted within the scope of achieving similar effects.

[0012] Fig. 1 is a perspective view showing a bag of one embodiment. As shown in Fig. 1, bag 10 of this embodiment is a self-supporting bag made by sandwiching a folded bottom sheet 14 between a pair of body sheets 12a, 12b and applying side seals 16 and a bottom seal 18.

[0013] The bag 10 is made by a continuous bag making machine. FIG. 2 is a schematic diagram showing one embodiment of a continuous bag making machine of the present invention. As shown in FIG. 2, the continuous bag making machine 20 includes a feeding process A in which long body sheets 12a, 12b and a long bottom sheet 14 are fed, the bottom sheet 14 is folded back toward the inside of the bag, punch holes are formed in the bottom sheet 14 by a punch hole punching unit (not shown), and the bottom sheet 14 is inserted between and overlapped with the body sheet 12a (front side) and the body sheet 12b (back side); a sealing process B in which the overlapped body sheets 12a, 12b and the bottom sheet 14 are sealed with a bottom seal bar 22 and a side seal bar 24; and a punching process D in which the bag shape is punched out by a punching device 28. Note that FIG. 2 shows the configuration of the main parts of the continuous bag making machine 20, and components that are less relevant to the characteristics of this embodiment are omitted.

[0014] FIG. 3 is a partially enlarged plan view of the bag during bag production in the inspection process C of FIG. The body sheets 12a, 12b and the bottom sheet 14 are sheets in which a base film layer and a sealant layer are laminated together, and the heat from the bottom seal bar 22 and the side seal bar 24 melts the sealant layer, fusing the sheets together. In addition, as shown in Figure 3, punch holes 30 are provided in the bottom sheet 14 at the positions where the side seals 16 are to be attached, and the punch holes 30 are provided so that the pair of body sheets 12a, 12b are directly sealed and fused together.

[0015] The bottom seal bar 22 is a hot plate formed in the shape of a ship's bottom, with a concave curve in the center, and fuses the bottom sheet 14 to the pair of body sheets 12a, 12b. The side seal bar 24 is formed in a straight line and fuses the pair of body sheets 12a, 12b to each other and fuses the body sheets 12a, 12b to the bottom sheet 14. The side seal bar 24 is set to a width that allows it to simultaneously seal the sides of the preceding and succeeding bags being made in succession. In addition, sealing the same position with multiple side seal bars 24 can increase the seal strength.

[0016] The bags with bottom seal 18 and side seal 16 are punched out into individual bags by a punching blade in punching process D. Before punching, the bags have a portion 32 outside the bag area of ​​a predetermined width between the preceding bag and the following bag.

[0017] In the present invention, an inspection device 26 is installed between the sealing process B where the bottom seal 22 and the side seal 14 are made and the punching process D, and an inspection process C using this inspection device is provided. One embodiment of the bag inspection device according to the present invention is characterized by performing inspection by the following method: That is, the device inspects bags 10, which are made by applying side seals 16 and bottom seal 18 while a bottom sheet 14 folded in half is sandwiched between a pair of body sheets 12a, 12b, and includes an imaging means for photographing inspection points on the side seals 16, bottom seal 18, and bottom sheet 14, a seal position inspection means for inspecting whether the positions of the side seals 16 and bottom seal 18 are correct based on the images photographed by the imaging means, and a bottom sheet position inspection means for inspecting whether the position of the bottom sheet 14 is correct based on the images photographed by the imaging means.

[0018] In another embodiment, an inspection device for bags 10 has side seals 16 and bottom seals 18 applied between a pair of body sheets 12a, 12b with a folded bottom sheet 14 sandwiched in half, and the side seal 16 at the portion where the bottom sheet 14 is sandwiched directly seals the pair of body sheets 12a, 12b together through a punch hole 30 provided in the bottom sheet 14, and is equipped with a photographing means for photographing the inspection points of the side seal 16, bottom seal 18, bottom sheet 14, and punch hole 30, a seal position inspection means for inspecting whether the positions of the side seal 16 and bottom seal 18 are appropriate based on the image photographed by the photographing means, a bottom sheet position inspection means for inspecting whether the position of the bottom sheet 14 is appropriate based on the image photographed by the photographing means, and a punch hole position inspection means for inspecting whether the position of the punch hole 30 is appropriate based on the image photographed by the photographing means.

[0019] First, the imaging means of one embodiment of the inspection device according to the present invention will be described. The photographing means is exemplified by a camera that photographs the inspection point for each bag that is continuously conveyed in the inspection device 26 of the continuous bag making machine. The photographing range that constitutes the inspection point is a range that includes the inspection targets described below, such as the side seal inspection position, the bottom seal inspection position, the bottom sheet inspection position, and the punch hole inspection position. A photograph may be taken for each inspection target, or a range that includes all inspection targets and the reference position may be photographed. In particular, photographing a range that includes all inspection targets is preferable since the photographed images can be processed once. It is preferable that the photographing range includes a reference position for determining positional deviation.

[0020] The reference position may be set on one of the pair of long body sheets 12a, 12b, that is, on the body sheet 12a that is photographed by the imaging means. The reference position may be set from printed information on the long body sheet 12a, or may be set by separately printing a reference position at a position 32 on the body sheet 12a that is outside the bag area, or may be set by providing a protrusion or recess by embossing or the like at the position 32 on the body sheet 12a that is outside the bag area.

[0021] When setting the reference position from the printed information on the body sheet 12a, it can be set appropriately from the printed design such as letters, symbols, numbers, pictures, etc., such as the corner of a letter. Furthermore, when printing the reference position a at position 32 outside the bag area, it is preferable to print it at the same time as printing the body sheet, and it is preferable that it be a color or shape that is easy to recognize when photographed with an imaging unit, such as a black circle or an X mark. Only one reference position may be set for all inspection objects, or multiple reference positions may be set for each inspection object.

[0022] Next, the seal position inspection means will be described. The seal position inspection means inspects whether the side seals 16 and the bottom seal 18 are in the proper positions based on the images taken by the imaging means. The seal position inspection means for inspecting whether the positions of the side seal 16 and the bottom seal 18 are proper or not comprises a seal position detection means for detecting the positions of the side seal 16 and the bottom seal 18, and a seal position determination means for determining whether the positions of the side seal 16 and the bottom seal 18 detected by the seal position detection means are proper or not.

[0023] The seal position detection means is preferably set at any location on the side seal 16 and the bottom seal 18, particularly at a location that is easy to detect by image processing. The detection method includes a method of detecting the side seal 16 and the bottom seal 18 separately, and a method of detecting the intersection of the side seal 16 and the bottom seal 18. When detecting the side seal 16 and the bottom seal 18 separately, the method of detecting the side seal 16 is, for example, to detect the boundary lines 16a, 16a' on both sides of the side seal 16, and based on these boundary lines 16a, 16a' on both sides, calculate the virtual center line 16b to obtain the inspection position of the side seal 16. Then, in the next step, the seal position determining means can determine whether or not the side seal 16 is positioned within the appropriate range based on the positional relationship between the imaginary center line 16b and the reference position a.

[0024] In addition, as a method of detecting the bottom seal 18, for example, the outline of the unsealed portion 18a of the bottom seal 18 formed in association with an air vent hole (circular or elliptical, not shown) provided in the bottom seal bar is detected, and the center of gravity 18b of the detected unsealed portion 18a is calculated to obtain the inspection position of the bottom seal 18. The seal position determining means can determine whether the bottom seal 18 is positioned within the appropriate range based on the positional relationship between the center of gravity 18b of the unsealed portion and the reference position a.

[0025] As a method of detecting the intersection of the side seal 16 and the bottom seal 18, the position of the intersection α between the boundary line 16a of the side seal 16 and the boundary line 18c of the bottom seal 18 can be detected to obtain the inspection position. The seal position determining means can determine whether or not both the side seal 16 and the bottom seal 18 are positioned within the appropriate range based on the positional relationship between the intersection α of the side seal 16 and the bottom seal 18 and the reference position a. This allows the positions of both the side seal 16 and the bottom seal 18 to be inspected at once, without the need to detect the positions of the side seal 16 and the bottom seal 18 separately.

[0026] The seal position determination means determines whether the side seals 16 and the bottom seal 18 are located within the appropriate range by comparing the positional relationship from a reference position a set on the body sheet 12a with a predetermined appropriate range. Specifically, when making a judgment using the virtual center line 16b of the side seal 16, the appropriate distance between the virtual center line 16b of the side seal 16 and the reference position a and the allowable deviation range (appropriate range) from the appropriate distance are set in advance, and whether or not the appropriate range is met is determined based on the virtual center line 16b of the side seal 16 calculated in the seal position detection process. In addition, when making the judgment using the center of gravity 18b of the unsealed portion of the bottom seal 18 or when making the judgment using the intersection point α of the side seal 16 and the bottom seal 18, the judgment can be made in the same manner as above. The results of the assessment are preferably sent to a display unit (not shown) provided on the continuous bag making machine, where pass / fail is displayed. This display allows the operator of the bag making device to know whether the bags are being made properly.

[0027] Next, the bottom sheet position inspecting means will be described. The present invention has discovered that a bag that does not leak can be made by checking the positions of the two means, the seal position inspection means and the bottom sheet position inspection means. In other words, when a bag is filled with liquid contents, stress is concentrated at the boundary between the body sheet and the bottom sheet in the side seal, and if the seal strength at the boundary weakens over time, liquid leakage will occur from there.Based on this discovery, it was found that the positional relationship between the above-mentioned seal intersection α and sheet step intersection 16c is important, and further, it was found that in addition to the seal positions of the side seal 16 and bottom seal 18, the positional relationship of the bottom sheet 14 is also important, which led to the present invention.

[0028] A bottom sheet position inspecting means of an embodiment of the inspection device according to the present invention will be described. The bottom sheet position inspection means, which inspects whether the position of the bottom sheet 14 is appropriate based on the image captured by the photographing means, preferably includes a bottom sheet position detection means which detects the position of the fold line 34 of the bottom sheet 14, and a bottom sheet position determination means which determines whether the fold line 34 of the bottom sheet detected by the bottom sheet position detection means falls within a predetermined appropriate range in terms of its positional relationship with the reference position a set on the torso sheet 12a.

[0029] The bottom sheet position detection means processes the image captured by the imaging means to detect the fold line 34 of the bottom sheet. Then, the bottom sheet position determination means determines whether the fold line 34 of the bottom sheet is located within a predetermined appropriate range based on the positional relationship between the fold line 34 of the bottom sheet and the reference position a. The results of the assessment are preferably sent to a display unit (not shown) provided on the continuous bag making machine, where pass / fail is displayed. This display allows the operator of the bag making device to know whether the bags are being made properly.

[0030] Next, the punched hole position inspecting means described above as another embodiment will be described. Another embodiment of the present invention is characterized by including a punch hole position inspection means that inspects whether the punch holes 30 in the bottom sheet are in the correct position, in addition to the seal position and bottom sheet position. If the punch holes in the manufactured bag are misaligned, the seal strength of the bag may be reduced, which may cause liquid leakage when the bag is filled with liquid contents.

[0031] The punch hole position inspection means of this embodiment includes a punch hole position detection means that detects the position of the center of gravity γ of the punch hole, and a punch hole position determination means that determines whether the position of the center of gravity γ of the punch hole detected by the punch hole position detection means falls within a predetermined appropriate range in terms of its positional relationship with a reference position a set on the body sheet 12a.

[0032] The punch hole position detection means detects the outline of the punch hole 30 based on the image captured by the imaging means, and calculates the center of gravity γ of the punch hole 30 from this outline to obtain the position of the punch hole 30 to be inspected. Then, the punch hole position determining means determines whether the center of gravity γ of the punch hole 30 is located within a predetermined appropriate range based on the positional relationship between the center of gravity γ of the punch hole 30 and the reference position a. Furthermore, when the punch hole position detection means detects the outline of the punch hole 30, it is also possible to check whether the punch hole is maintained in a perfectly circular shape, i.e., whether the punch hole is not stretched when tension is applied to the sheet during continuous bag production. The results of the assessment are preferably sent to a display unit (not shown) provided on the continuous bag making machine, where pass / fail is displayed. This display allows the operator of the bag making device to know whether the bags are being made properly.

[0033] As described above, in this embodiment, three inspections are performed: the seal position inspection means, the bottom sheet position inspection means, and optionally the punch hole position inspection means. However, it is also possible to perform four or more position inspections. For example, it is also possible to inspect the side seal width, the bottom seal width, and the position of the bottom sheet lower end.

[0034] Next, a bag inspection method according to the present invention will be described. The bag inspection method of the present invention is carried out using the bag inspection device described above. That is, the method for inspecting bags 10, which are made by applying side seals 16 and bottom seal 18 while sandwiching a bottom sheet 14 folded in half between a pair of body sheets 12a, 12b, includes an imaging step of photographing inspection points of the side seals, the bottom seal, and the bottom sheet with an imaging means, a seal position inspection step of inspecting whether the positions of the side seals 16 and the bottom seal 18 are correct based on the images photographed in the imaging step, and a bottom sheet position inspection step of inspecting whether the position of the bottom sheet 14 is correct based on the images photographed in the imaging step.

[0035] In another embodiment, there is provided a method for inspecting bags 10 in which side seals 16 and bottom seals 18 are applied between a pair of body sheets 12a, 12b with a bottom sheet 14 folded in half sandwiched therebetween, and the side seal 16 at the portion where the bottom sheet 14 is sandwiched directly seals the pair of body sheets 12a, 12b together via a punch hole 30 provided in the bottom sheet 14. The method includes an imaging process for photographing the inspection points of the side seals, the bottom seal, the bottom sheet, and the punch hole using an imaging means; a seal position inspection process for inspecting whether the positions of the side seals 16 and the bottom seal 18 are appropriate based on the images taken in the imaging process; a bottom sheet position inspection process for inspecting whether the position of the bottom sheet 14 is appropriate based on the images taken in the imaging process; and a punch hole position inspection process for inspecting whether the position of the punch hole 30 is appropriate based on the images taken in the imaging process.

[0036] The bag inspection process of the present invention is a method that can perform the inspections necessary to produce bags that are not likely to leak when filled with liquid contents, and this method makes it possible to select bags that are less likely to leak. [Explanation of symbols]

[0037] 10 bags 12a Torso Sheet 12b Torso sheet 14 Bottom Sheet 16 Side seal 16a 16a' Side seal boundary line 16b Virtual center line of side seal 16c Stepped part of side seal 18 Bottom seal 18a Unsealed part 18b Center of gravity of unsealed part 18c Bottom seal border 20 Continuous bag making machine 22 Bottom seal bar 24 Side seal bar 26 Inspection equipment 28 Punching device 30 punch holes 32 Areas outside the bag 34 Bottom sheet fold line a Reference position α Intersection of side seal and bottom seal γ Center of gravity of punch hole A Feeding process B. Sealing process C. Inspection process D. Punching process

Claims

1. The bottom sheet folded in half is sandwiched between the pair of body sheets, and the side seals and the box are An inspection device for bags made with Tom Seal, A photographing means for photographing the inspection points of the side seal, the bottom seal, and the bottom sheet. Step by step, Based on the image captured by the imaging means, the positions of the side seal and the bottom seal are determined. a seal position inspection means for inspecting whether the seal position is correct; Based on the image captured by the imaging means, it is checked whether the position of the bottom sheet is correct. a bottom sheet position inspection means; The seal position inspection means a seal position detection means for detecting the positions of the side seals and the bottom seal; The positions of the side seal and the bottom seal are set at reference positions on the body sheet. a seal position determining means for determining whether the positional relationship with the seal position determining means is within a predetermined appropriate range, The bottom sheet position inspection means a bottom sheet position detecting means for detecting the position of the fold line of the bottom sheet; The fold line of the bottom sheet is in a positional relationship with a reference position set on the body sheet. A bag inspection device characterized by comprising a bottom sheet position determination means for determining whether or not the bottom sheet position is within a predetermined appropriate range.

2. The bottom sheet folded in half is sandwiched between the pair of body sheets, and the side seals and the box are The bottom sheet is sandwiched between the side seals, and the bottom sheet is sandwiched between the side seals. The pair of body sheets have a portion where they are directly sealed together by punch holes formed in the A bag inspection device, comprising: The inspection points of the side seal, the bottom seal, the bottom sheet, and the punched holes are photographed. a photographing means for photographing the subject; Based on the image captured by the imaging means, the positions of the side seal and the bottom seal are determined. a seal position inspection means for inspecting whether the seal position is correct; Based on the image captured by the imaging means, it is checked whether the position of the bottom sheet is correct. a bottom sheet position inspection means; A process for inspecting whether the positions of the punch holes are correct based on the image taken by the photographing means. and a punch hole position inspection means, The seal position inspection means a seal position detection means for detecting the positions of the side seals and the bottom seal; The positions of the side seal and the bottom seal are set at reference positions on the body sheet. a seal position determining means for determining whether the positional relationship with the seal position determining means is within a predetermined appropriate range, The bottom sheet position inspection means a bottom sheet position detecting means for detecting the position of the fold line of the bottom sheet; The fold line of the bottom sheet is in a positional relationship with a reference position set on the body sheet. a bottom sheet position determining means for determining whether the bottom sheet position is within a predetermined appropriate range; The punch hole position inspection means punch hole position detecting means for detecting the position of the center of gravity γ of the punch hole; The position of the center of gravity γ of the punched hole is in a positional relationship with a reference position set on the body sheet. and a punch hole position determining means for determining whether the punch hole position is within a predetermined appropriate range.

3. The position detection of the side seal by the seal position detection means is The boundary lines on both sides of the side seal are detected, and the center lines of the boundary lines on both sides are calculated to determine the position.

3. The bag inspection device according to claim 1, wherein the bag is inspected by detecting the presence or absence of the bag.

4. The position detection of the bottom seal by the seal position detection means is The contour of the unsealed portion in the bottom seal is detected, and the center of gravity of the unsealed portion is calculated.

3. The bag inspection device according to claim 1, wherein the position is detected by detecting the position of the bag.

5. The seal position inspection means The position is detected from the intersection α of the seal portion of the side seal and the bottom seal.

3. The bag inspection device according to claim 1 or 2.

6. A pair of body sheets with a folded bottom sheet sandwiched between them, and side seals and a box. A method for inspecting bags made with Tom Seal, comprising the steps of: The inspection points of the side seal, the bottom seal, and the bottom sheet are photographed by a photographing means. an imaging step of capturing an image of the Based on the images taken in the imaging step, the side seals and the bottom seals are a seal position inspection step for inspecting whether the position is proper; Based on the image taken in the imaging step, it is inspected whether the position of the bottom sheet is proper. and a bottom sheet position inspection step for inspecting the bottom sheet position, The seal position inspection step includes: a seal position detection step of detecting the positions of the side seals and the bottom seal; The positions of the side seal and the bottom seal are set at reference positions on the body sheet. a seal position determination step of determining whether the seal position is within a predetermined appropriate range in terms of its positional relationship with the seal position determination step; The bottom sheet position inspection step includes: a bottom sheet position detecting step of detecting the position of the fold line of the bottom sheet; The fold line of the bottom sheet is in a positional relationship with a reference position set on the body sheet. and a bottom sheet position determining step of determining whether the bottom sheet position is within a predetermined appropriate range.

7. A pair of body sheets with a folded bottom sheet sandwiched between them, and side seals and a box. The bottom sheet is sandwiched between the side seals, and the bottom sheet is sandwiched between the side seals. The pair of body sheets have a portion where they are directly sealed together by punch holes formed in the A method for inspecting a bag, comprising: The side seal, the bottom seal, the bottom sheet, and the pan are photographed by the photographing means. an imaging step of photographing the inspection point of the hole; Based on the images taken in the imaging step, the positions of the side seal and the bottom seal are a seal position inspection process for inspecting whether the seal position is proper; Based on the image taken in the imaging step, it is inspected whether the position of the bottom sheet is proper. a bottom sheet position inspection step; Based on the image taken in the imaging step, it is inspected whether the positions of the punch holes are correct. and a punch hole position inspection process. The seal position inspection step includes: a seal position detection step of detecting the positions of the side seals and the bottom seal; The positions of the side seal and the bottom seal are set at reference positions on the body sheet. a seal position determination step of determining whether the seal position is within a predetermined appropriate range in terms of its positional relationship with the seal position determination step; The bottom sheet position inspection step includes: a bottom sheet position detecting step of detecting the position of the fold line of the bottom sheet; The fold line of the bottom sheet is in a positional relationship with a reference position set on the body sheet. a bottom sheet position determining step for determining whether the bottom sheet position is within a predetermined appropriate range; The punch hole position inspection step a punch hole position detecting step of detecting the position of the center of gravity γ of the punch hole; The position of the center of gravity γ of the punched hole is in a positional relationship with a reference position set on the body sheet. and a punch hole position determination step of determining whether the punch hole position falls within a predetermined appropriate range.

Images