JP2021123387A - Bag making and packaging machine - Google Patents

Abstract

To easily determine a continuous packaging bag including a defective bag even when the number of bags is large.SOLUTION: A bag making and packaging machine (100) manufactures a continuous packaging bag having a plurality of article-containing bags connected, and comprises a bag making part, a detection part (3) and a control part (4). The bag making part manufactures the continuous packaging bag. The bag making part includes a cutting mechanism which cuts ends of the bags. The detection part (3) detects a defective which is at least one of the continuous packaging bag and an article. The control part (4) controls the bag making part. The control part (4) performs, when the detection part (3) detects the defect, control to manufacture, as one bag included in the continuous packaging bag, an identification bag having a size different from the normal size of the bags, and cut ends of the identification bag by the cutting mechanism.SELECTED DRAWING: Figure 3

Description

The present invention relates to a bag making and packaging machine.

As disclosed in Patent Document 1 (Japanese Unexamined Patent Publication No. 2004-352287), a bag-making and packaging machine for producing a continuous packaging bag (continuous packaging bag) in which a plurality of bags containing articles are arranged is known. .. Patent Document 1 discloses a control method for cutting a number of bags other than n in a row when a defect occurs in the bag when forming a continuous bag in which n bags are connected. According to the control method of Patent Document 1, if the configuration is such that the number of bags other than n is connected, the configuration is different from that of a normal continuous bag in which n bags are connected, so that the bag is defective. It is disclosed that it is possible to discharge a continuous bag containing.

However, in Patent Document 1, when the number of bags (n) of the continuous packaging bag is large, it is difficult to distinguish between the continuous packaging bag including the defective bag and the normal continuous packaging bag.

An object of the present invention is to provide a bag-making and packaging machine that can easily identify a continuous packaging bag including a defective bag even when the number of bags is large.

The bag-making / packaging machine according to the first aspect is a bag-making / packaging machine that manufactures a continuous packaging bag in which a plurality of bags containing articles are connected, and includes a bag-making unit, a detection unit, and a control unit. ing. The bag making section manufactures a continuous bag. The bag making section includes a cutting mechanism that cuts the end of the bag. The detection unit detects defects in at least one of the continuous bag and the article. The control unit controls the bag making unit. When the detection unit detects a defect, the control unit manufactures an identification bag with a size different from the normal size of the bag as one of the bags included in the continuous bag, and cuts the end of the identification bag by a cutting mechanism. Control to do.

In the bag making and packaging machine of the first aspect, when a defect of at least one of the continuous bag and the articles contained therein is detected, the bag is set to the normal size of the bag as one of the bags included in the continuous bag. Different sized identification bags are manufactured and the ends of the identification bags are cut. Therefore, if the size of the bag located at the end of the continuous bag is different from the normal size, it can be determined that the bag includes a defective bag. Therefore, even when the number of bags is large, it is possible to easily identify the continuous bag including the defective bag.

The bag-making and wrapping machine according to the second aspect is the bag-making and wrapping machine according to the first aspect, and the bag-making portion forms a horizontal sealing portion on the bag by horizontally sealing the film containing the article. Further includes a lateral seal mechanism. The detection unit detects the biting of the article in the lateral seal portion.

In the bag-making and packaging machine of the second aspect, it is possible to easily identify a continuous packaging bag including a bag in which biting has occurred.

The bag-making / wrapping machine according to the third aspect is the bag-making / wrapping machine according to the second aspect, and when the detection unit detects the biting of the k-th bag and the (k + 1) -th bag in the horizontal seal portion, The identification bag is manufactured by not forming a horizontal seal portion between the (k + 1) th bag and the (k + 2) th bag. In addition, k is an integer (natural number) of 1 or more.

In the bag-making and packaging machine of the third aspect, the position of the bag in which the bite has occurred in the continuous packaging bag can be easily determined.

The bag-making and wrapping machine according to the fourth aspect is the bag-making and wrapping machine according to the third aspect, and the control unit cuts between the (k + 2) th bag and the (k + 3) th bag by a cutting mechanism. Control to do.

In the bag-making and packaging machine of the fourth aspect, the identification bag is manufactured by the (k + 1) th bag and the (k + 2) th bag, and is cut at the end of the (k + 2) th bag. Therefore, after the identification bag is manufactured, it can be cut before the number of bags for continuous packaging is reached, so that useless bags can be reduced.

The bag-making and wrapping machine according to the fifth aspect is the bag-making and wrapping machine according to the fourth aspect, and the bag-making portion further includes a perforation forming mechanism for forming perforations between a series of bags. When the control unit does not cut the horizontal seal portion, the control unit forms a perforation in the horizontal seal portion by the perforation forming mechanism.

In the bag-making and packaging machine of the fifth aspect, since the perforation process is performed when the horizontal seal portion is not cut, the continuous packaging bag can be easily manufactured.

The bag-making and packaging machine according to the sixth aspect is the bag-making and packaging machine according to the first to fifth viewpoints, and the detection unit prints the bag as a defect of at least one of the continuous bag and the article. Detects at least one of defects, improper inclusion of foreign matter in the bag, improper weighing of articles, and defects in which the bag has a seam in the film that houses the articles.

In the bag-making and packaging machine of the sixth aspect, a continuous packaging bag including a bag with defective printing, a bag mixed with foreign matter, a bag with poor weighing, and a bag having a film seam can be easily identified.

The bag-making and packaging machine according to the seventh aspect is the bag-making and packaging machine according to the first to sixth aspects, and the continuous packaging bag has more than ten bags.

In the bag making and packaging machine of the seventh aspect, even if the continuous packaging bag has more than 10 bags, the continuous packaging bag including the defective bag can be easily identified.

The bag-making / packaging machine according to the eighth aspect is the bag-making / packaging machine according to the first to seventh aspects, and further includes a notification unit for notifying that a defect has been detected by the detection unit.

In the bag-making and packaging machine of the eighth aspect, when the notification unit detects a defect in at least one of the continuous packaging bag and the articles contained therein, the continuous packaging bag including the defective bag is discharged. It is easy to know.

The bag-making and wrapping machine according to the ninth aspect is the bag-making and wrapping machine according to the first to eighth viewpoints, and when the control unit cuts the end of the identification bag, the bag next to the identification bag is first. Control to manufacture a continuous packaging bag.

In the bag-making and packaging machine of the ninth aspect, the number of bags included in the defective continuous packaging bag can be reduced.

The bag-making and wrapping machine according to the tenth viewpoint is a bag-making and wrapping machine according to the first to ninth viewpoints, and the control unit manufactures an identification bag having a length that is an integral multiple of the normal size of the bag. To control.

In the bag-making and packaging machine of the tenth aspect, the identification bag can be easily manufactured. Further, it is suitably used for a bag making and packaging machine that manufactures a bag printed on a film.

According to the present invention, even when the number of bags is large, it is possible to easily identify a continuous bag including a defective bag.

It is a schematic diagram which shows the bag making packaging machine of embodiment. It is a schematic diagram which shows the continuous bag of embodiment. It is a block diagram of the bag making packaging machine of an embodiment. It is a schematic diagram for demonstrating the identification bag manufactured by the bag making packaging machine of embodiment. It is a schematic diagram for demonstrating the identification bag manufactured by the bag making packaging machine of embodiment.

The bag-making and packaging machine 100 according to the embodiment of the present invention will be described below.

(1) Overall Overview The bag-making / packaging machine 100 shown in FIG. 1 is a bag-making / packaging machine that manufactures a continuous packaging bag C in which a plurality of bags B containing an article A shown in FIG. 2 are connected. The continuous packaging bag C may have two or more bags B, but the bag making / packaging machine 100 is suitably used for manufacturing the continuous packaging bag C having three or more bags B, and more than 10 bags. It is preferably used in the production of the continuous packaging bag C having the above. Here, a continuous bag C having 11 bags, that is, 11 bags B is manufactured. Then, in FIG. 2, in the bag B constituting the continuous packaging bag C, B1, B2, B3, B4, B5, B6, B7, B8, B9, B10 and B11 are set in order from the beginning.

Each bag B constituting the continuous packaging bag C has a vertical seal portion (not shown) and a horizontal seal portion XT. The horizontal seal portion XT is formed between the bags B. A perforation P is formed in the horizontal seal portion XT. The continuous packaging bag C of the present embodiment has a plurality of bags B in a row and does not have a header that is a hanging portion. The continuous bag C may have a header on the uppermost bag B.

As shown in FIG. 1, the bag making and packaging machine 100 is installed below the weighing machine 1. The weighing machine 1 weighs the article A contained in each bag B. The weighing machine 1 is arranged on the upstream side of the bag making and packaging machine 100. The bag-making and packaging machine 100 receives the article A from the weighing machine 1 and wraps the article A with the film F. As shown in FIG. 2, the bag-making and packaging machine 100 is a continuous packaging bag in which a plurality of bags B containing the article A are connected. Manufacture C.

The bag-making / packaging machine 100 includes a bag-making unit 2 shown in FIG. 1, a detection unit 3 shown in FIG. 3, a control unit 4, and a notification unit 5. The bag making section 2 manufactures the continuous packaging bag C shown in FIG. The detection unit 3 detects defects in at least one of the continuous packaging bag C and the article A. The control unit 4 controls the bag making unit 2. The notification unit 5 notifies that the detection unit 3 has detected a defect.

(2) Detailed configuration (2-1) Bag making section As shown in FIG. 1, the bag making section 2 includes a film roll holding section 10, a tension adjusting mechanism 20, a forming mechanism 30, a conveying mechanism 40, and a vertical portion. It includes a sealing mechanism 50, a horizontal sealing mechanism 60, a cutting mechanism 70, a perforation forming mechanism 80, and a printing mechanism 90.

(2-1-1) Film Roll Holding Unit The film roll holding unit 10 is a mechanism for holding the film roll R in which the sheet-shaped film F, which is the material of the bag B, is wound around the winding core Rc. The film roll holding portion 10 is arranged at the uppermost stream in the transport path of the film F of the bag making / packaging machine 100.

The film F wound around the film roll R may include one or more seams of the film F for the convenience of manufacturing the film roll R. At the seam of the film F, the film F and the film F are connected by a tape or the like over the entire width direction of the film F.

The film roll holding portion 10 includes a rotating shaft 11 to which the winding core Rc of the film roll R is attached, and a roll drive motor (not shown) for rotating the rotating shaft 11. When the roll drive motor operates, the film F is unwound from the film roll R, and the unwound film F is transported by the transport mechanism 40. The film F drawn out from the film roll R is guided by the movable roller 21 and the fixed roller 22 of the tension adjusting mechanism 20 described later, and is conveyed to the former 31 of the forming mechanism 30.

(2-1-2) Tension Adjusting Mechanism The tension adjusting mechanism 20 is a mechanism for adjusting the magnitude of the tension acting on the film F to be conveyed. The tension adjusting mechanism 20 includes a movable roller 21, a fixed roller 22, and an encoder (not shown).

The movable roller 21 and the fixed roller 22 are both rotatable rollers. The fixed roller 22 is fixed to a frame (not shown) of the bag making / packaging machine 100, and its position does not change. On the other hand, the movable roller 21 is attached to, for example, the end of an arm (not shown) rotatably attached to a frame (not shown) of the bag making / packaging machine 100 so that the position of the movable roller 21 can be changed. It is configured. The magnitude of the tension applied to the film F to which the tension adjusting mechanism 20 is conveyed is adjusted by the magnitude of the force applied to the film F by the movable roller 21. The encoder is configured to detect the rotation angle of the arm (not shown) to which the movable roller 21 is attached about the rotation axis. When all the films F of the film roll R are pulled out, the film F exerts a large force on the movable roller 21, whereby the arm to which the movable roller 21 is attached is rotated. It is configured to detect the end of the film F wound around the film roll R based on the movement of the arm detected by the encoder.

(2-1-3) Molding mechanism 30
The molding mechanism 30 rolls the sheet-shaped film F into a tubular shape. The molding mechanism 30 has a former 31 and a tube 32. The former 31 bends the sheet-shaped film F so that the left end portion and the right end portion of the film F overlap each other to form a tubular film FT.

The former 31 is arranged so as to surround the cylindrical tube 32 in the circumferential direction. The tubular film FT formed by the former 31 is guided so as to be wound around the outer peripheral surface on the lower side of the cylindrical tube 32, and is conveyed downward while being wound around the tube 32.

The tube 32 is a cylindrical member that extends in the vertical direction and has upper and lower ends open. The upper portion of the tube 32 is formed in a funnel shape having a larger diameter toward the upper end side. The lower portion of the tube 32 has a uniform diameter.

The tube 32 receives the article A falling from the upper weighing machine 1 through the upper opening. The article A introduced through the opening at the top of the tube 32 passes through the inside of the tube 32 and is supplied to the inside of the tubular film FT through the opening at the bottom of the tube 32. The tube 32 functions as a guide for guiding the article A falling from above into the tubular film FT.

(2-1-4) Transport mechanism 40
The transport mechanism 40 transports the film F. Here, the transport mechanism 40 transports the film F drawn from the film roll R to the former 31. Further, the transport mechanism 40 transports the tubular film FT formed by the former 31 to the horizontal sealing mechanism 60. The transport mechanism 40 attracts the tubular film FT wound around the tube 32 and transports it downward.

The transport mechanism 40 is arranged below the former 31. Further, the transport mechanism 40 is arranged on the left side (not shown) and the right side of the tube 32, respectively.

The transport mechanism 40 includes a belt 41, a drive roller 42, and a driven roller 43. The belt 41 has a suction function. The belt 41 is wound around the drive roller 42 and the driven roller 43. The drive roller 42 is connected to a roller drive motor (not shown) and is driven by the roller drive motor. When the drive roller 42 is driven by the drive motor while the belt 41 attracts the film F, the tubular film FT is conveyed downward.

(2-1-5) Vertical seal mechanism 50
The vertical sealing mechanism 50 seals the overlapping portion of the tubular film FT in the vertical direction. The vertical seal mechanism 50 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 as to approach the tube 32 or move away from the tube 32. By driving the heater belt closer to the tube 32 by the drive mechanism, the overlapping portion of the tubular film FT wound around the tube 32 is sandwiched between the heater belt and the tube 32. The vertical sealing mechanism 50 heat-seals the overlapping portion of the tubular film FT in the vertical direction by pressing the overlapping portion of the tubular film FT against the tube 32 with a heated heater belt. By this vertical seal, a vertical seal portion is formed on the bag B.

(2-1-6) Horizontal seal mechanism 60
The horizontal sealing mechanism 60 seals the bag B by laterally sealing the upper and lower ends of the bag B in the tubular film FT. The horizontal seal mechanism 60 is arranged below the transport mechanism 40 and the vertical seal mechanism 50. The horizontal sealing mechanism 60 seals the tubular film FT in a direction intersecting the conveying direction of the tubular film FT, more specifically, in a direction orthogonal to the conveying direction of the tubular film FT (left-right direction).

The lateral seal mechanism 60 has a pair of seal jaws 61 and 62 arranged before and after the tubular film FT, respectively. Both the first seal jaw 61 and the second seal jaw 62 have a heater. The first seal jaw 61 and the second seal jaw 62 function as a pair when laterally sealing the tubular film FT. Specifically, when a drive mechanism (not shown) is driven, the first seal jaw 61 and the second seal jaw 62 move so as to approach each other. Then, the first seal jaw 61 and the second seal jaw 62 sandwich the tubular film FT in a state of being pressed against each other, and apply pressure and heat to a part of the tubular film FT which is the upper and lower ends of the bag B. Side seal. By this lateral seal, the lateral seal portion XT is formed on the bag B.

(2-1-7) Cutting mechanism 70
The cutting mechanism 70 cuts the end portion of the bag B. Specifically, the cutting mechanism 70 cuts the tubular film FT at the lateral seal portion XT of the bag B. The cutting mechanism 70 is provided in the horizontal sealing mechanism 60. The cutting mechanism 70 includes a cutter 71 and a receiving portion 72. The cutter 71 is provided on the first seal jaw 61. The receiving portion 72 is provided on the second seal jaw 62. The cutter 71 can be extended and retracted. The extended cutter 71 is housed in the receiving portion 72. By extending the cutter 71, the lateral seal portion XT is laterally cut at the central portion in the transport direction of the tubular film FT.

(2-1-8) Perforation forming mechanism The perforation forming mechanism 80 forms a perforation P between a series of bags B. The perforation mechanism 80 of the present embodiment is included in the cutting mechanism 70. Specifically, the cutter of the perforation forming mechanism 80 is common to the cutter 71 of the cutting mechanism 70. When forming the perforation P on the lateral seal portion XT of the bag B, the force is weaker than the force applied when the lateral seal portion XT is cut by the cutting mechanism 70, that is, the force is such that the force is not cut. The cutter 71 is extended to the horizontal seal portion XT. As a result, in the lateral seal portion XT, a perforation P is formed in the lateral direction at the central portion of the tubular film FT in the transport direction.

(2-1-9) Printing Mechanism The printing mechanism 90 prints predetermined information such as a manufacturing date at an appropriate position on the film F being conveyed. When the printing mechanism 90 prints on the film F, predetermined information is printed on each of the bags B discharged from the bag making and packaging machine 100.

The printing mechanism 90 is arranged on the surface side of the film F to be conveyed. The printing mechanism 90 is arranged on the downstream side of the tension adjusting mechanism 20.

(2-2) Detection unit The detection unit 3 shown in FIG. 3 detects a defect that occurs in the bag-making / packaging machine 100 or a device (here, the weighing machine 1) arranged upstream of the bag-making / packaging machine 100. .. The detection unit 3 of the present embodiment does not detect a defect that occurs in a device arranged downstream of the bag making / packaging machine 100.

The detection unit 3 is a film F in which the article A is caught in the horizontal seal portion XT, the printing of the bag B is defective, the foreign matter is mixed into the bag B, the measurement of the article A is defective, and the bag B accommodates the article A. Detects at least one of the defects having a seam of. The detection unit 3 of the present embodiment includes a bite detection unit 3a, a print detection unit 3b, a foreign matter detection unit 3c, a measurement detection unit 3d, and a seam detection unit 3e.

The bite detection unit 3a detects the bite of the article A in the horizontal seal portion XT. Here, the bite detection unit 3a detects whether or not the bite of the article A has occurred when the tubular film FT is laterally sealed by the horizontal seal mechanism 60. The bite detection unit 3a is an encoder or the like of a drive mechanism for moving a pair of seal jaws 61, 62.

The print detection unit 3b detects a printing defect of the bag B. Here, the print detection unit 3b detects whether or not the print position of the film F by the print mechanism 90 is abnormal by imaging.

The foreign matter detecting unit 3c detects the defect of foreign matter mixed in the bag B. The foreign matter is something other than Article A. Here, the foreign matter detection unit 3c is a metal detector that detects whether or not metal is mixed in the bag B.

The weighing detection unit 3d detects a defective weighing of the article A. Here, the weighing detection unit 3d receives a signal from the weighing machine 1 that the article A having a weight outside the predetermined weight range is discharged from the measuring machine 1 to the tube 32 of the molding mechanism 30, resulting in a defective weighing. Is detected.

The seam detection unit 3e detects a defect in which the bag B has a seam of the film F accommodating the article A. Here, the seam detection unit 3e is a registration mark sensor that detects whether or not the tubular film FT that seals laterally has a seam.

(2-3) Control unit The control unit 4 is realized by a computer. The control unit 4 includes a control arithmetic unit and a storage device. A processor such as a CPU (Central Processing Unit) or a GPU (Graphics Processing Unit) can be used as the control arithmetic unit. The control arithmetic unit reads a program stored in the storage device and performs a predetermined arithmetic processing according to the program. Further, the control arithmetic unit can write the arithmetic result to the storage device and read the information stored in the storage device according to the program.

When the detection unit 3 detects a defect, the control unit 4 manufactures an identification bag D (see FIGS. 4 and 5) having a size different from the normal size of the bag B as one of the bags included in the continuous bag C. Then, the cutting mechanism 70 is controlled to cut the end portion of the identification bag D. The identification bag D is not particularly limited as long as it has a size different from that of each bag B, but from the viewpoint of easy manufacturing, the identification bag D is preferably a length larger than the normal size of the bag B, and more preferably the normal size of the bag B. It is controlled to manufacture the identification bag D having a length obtained by an integral multiple of. The length is the length in the vertical direction along the vertical seal portion. In this way, when the control unit 4 acquires that the detection unit 3 has detected a defect, the control unit 4 manufactures a long bag as the identification bag D.

Further, when the end portion of the identification bag D is cut, the control unit 4 controls to manufacture the continuous packaging bag C with the bag B next to the identification bag D as the first bag.

When the control unit 4 detects the bite in the horizontal seal portion XT between the kth bag and the (k + 1) th bag by the bite detection unit 3a, the control unit 4 connects the (k + 1) th bag and the (k + 2) th bag. The identification bag D is manufactured by not forming the horizontal seal portion XT between them. Then, the control unit 4 controls the cutting mechanism 70 to cut between the (k + 2) th bag and the (k + 3) th bag. As a result, the identification bag D is manufactured by the (k + 1) th bag and the (k + 2) th bag, and is cut at the end of the (k + 2) th bag. Therefore, in the cut state, the identification bag D is located at the end of the defective continuous bag C.

A specific example will be described with reference to FIG. FIG. 4 shows how the control unit 4 manufactures the identification bag D when the bite detection unit 3a detects the bite in the horizontal seal portion XT between the kth bag and the (k + 1) th bag. It is a figure explaining whether to control. FIG. 4A shows a state in which a biting defect is not detected, that is, a state in which the continuous packaging bag C is normally manufactured, which is the same as in FIG.

As shown in FIG. 4B, when the bite detection unit 3a detects the bite in the horizontal seal portion XT between the first bag B1 and the second bag B2, the control unit 4 controls the second bag. The identification bag D is manufactured by controlling the horizontal seal mechanism 60 so as not to form the horizontal seal portion XT between the B2 and the third bag B3. Then, the control unit 4 controls the cutting mechanism 70 to cut between the third bag B3 and the fourth bag B4. As a result, the identification bag D formed by the second bag B2 and the third bag B3 is located at the end of the cut continuous bag C. The identification bag D here does not have the horizontal seal portion XT and the perforation P, and has twice the normal length of the bag B. After that, the control unit 4 uses the bag that was planned to be the fourth bag B4 if no defect is detected as the first bag B1 of the new continuous bag C, and uses the new continuous bag C as the first bag B1. Control to manufacture.

In the example shown in FIG. 4C, when the bite detection unit 3a detects the bite in the lateral seal portion XT between the second bag B2 and the third bag B3, the control unit 4 is the third. The identification bag D is manufactured by not forming the lateral seal portion XT between the bag B3 and the fourth bag B4, and is cut at the end of the fourth bag B4. In the example shown in FIG. 4D, when the bite detection unit 3a detects the bite in the horizontal seal portion XT between the third bag B3 and the fourth bag B4, the control unit 4 is the fourth. The identification bag D is manufactured by not forming the lateral seal portion XT between the bag B4 and the fifth bag B5, and is cut at the end of the fifth bag B5.

Similarly, FIG. 4E shows an example in which biting of the fourth bag B4 and the fifth bag B5 in the lateral seal portion XT is detected. FIG. 4F shows an example in which biting in the lateral seal portion XT between the fifth bag B5 and the sixth bag B6 is detected. FIG. 4 (g) shows an example in which biting in the lateral seal portion XT between the sixth bag B6 and the seventh bag B7 is detected. FIG. 4H shows an example in which biting of the seventh bag B7 and the eighth bag B8 in the lateral seal portion XT is detected. FIG. 4 (i) shows an example in which biting in the lateral seal portion XT between the eighth bag B8 and the ninth bag B9 is detected. FIG. 4J shows an example in which biting of the ninth bag B9 and the tenth bag B10 in the lateral seal portion XT is detected.

Further, when the control unit 4 can identify that the k-th bag is defective by at least one detection unit 3 of the print detection unit 3b, the foreign matter detection unit 3c, the measurement detection unit 3d, and the seam detection unit 3e. , The horizontal seal portion XT is not formed between the k-th bag and the (k + 1) -th bag. Then, the control unit 4 controls the cutting mechanism 70 to cut between the (k + 1) th bag and the (k + 2) th bag. As a result, the identification bag D is manufactured by the k-th bag and the (k + 1) -th bag, and is cut at the end of the (k + 1) -th bag.

A specific example will be described with reference to FIG. FIG. 5 is a diagram illustrating how the control unit 4 controls to manufacture the identification bag D when the print detection unit 3b or the like detects that the kth bag B is defective. .. FIG. 5A shows a state in which a defect is not detected, that is, a state in which the continuous packaging bag C is normally manufactured, which is the same as in FIG.

As shown in FIG. 5B, when the print detection unit 3b or the like detects that the first bag B1 is defective, the control unit 4 puts it between the first bag B1 and the second bag B2. The identification bag D is manufactured by controlling the horizontal seal mechanism 60 so as not to form the horizontal seal portion XT. Then, the control unit 4 controls the cutting mechanism 70 to cut between the second bag B2 and the third bag B3. As a result, an identification bag D is formed at the end of the cut continuous bag C by the first bag B1 and the second bag B2. The identification bag D here has twice the normal length of the bag B. After that, the control unit 4 uses the bag that was planned to be the third bag B3 if no defect is detected as the first bag B1 of the new continuous bag C, and uses the new continuous bag C as the first bag B1. Control to manufacture.

In the example shown in FIG. 5C, when the print detection unit 3b or the like detects that the second bag B2 is defective, the control unit 4 between the second bag B2 and the third bag B3. The identification bag D is manufactured by not forming the horizontal seal portion XT in the bag, and is cut at the end of the third bag B3. In the example shown in FIG. 5D, when the print detection unit 3b or the like detects that the third bag B3 is defective, the control unit 4 between the third bag B3 and the fourth bag B4. The identification bag D is manufactured by not forming the horizontal seal portion XT in the bag, and is cut at the end of the fourth bag B4.

Similarly, FIG. 5 (e) shows an example in which the fourth bag B4 is detected to be defective. FIG. 5F shows an example in which the fifth bag B5 is detected to be defective. FIG. 5 (g) shows an example in which the sixth bag B6 is detected to be defective. FIG. 5H shows an example in which the seventh bag B7 is detected to be defective. FIG. 5 (i) shows an example in which the eighth bag B8 is detected to be defective. FIG. 5 (j) shows an example in which the ninth bag B9 is detected to be defective. FIG. 5K shows an example in which the tenth bag B10 is detected to be defective.

On the other hand, when the control unit 4 does not cut the horizontal seal portion XT, the control unit 4 forms the perforation P in the horizontal seal portion XT by the perforation forming mechanism 80. Specifically, the control unit 4 cuts the end of the identification bag D when the detection unit 3 detects a defect, and the continuous packaging bag when the number of bags reaches a predetermined number (11 in this case). Except for the case where the end portion of C is cut, the perforation P is formed in the lateral seal portion XT of each bag B constituting the continuous bag C by the perforation forming mechanism 80.

(2-4) Notification unit The notification unit 5 shown in FIG. 3 notifies that the detection unit 3 has detected a defect. When the notification unit 5 detects that at least one of the continuous packaging bag C and the article A contained therein is defective, the user can easily know that the defective continuous packaging bag C is discharged. ..

When the detection unit 3 detects a defect in at least one of the continuous bag C and the article A contained therein, the detection unit 3 transmits the detection to the notification unit 5. The notification unit 5 that has received the detection displays the detection so that the user can recognize it.

The notification unit 5 selects whether to stop the bag making / packaging machine 100 or continue the operation when the defective continuous packaging bag C is discharged. Therefore, when the user knows that the defective continuous packaging bag C is discharged by the notification unit 5, he / she can select whether to stop or continue the operation of the bag making / packaging machine 100.

(3) Operation of the bag-making / packaging machine 100 First, the operation of the bag-making / packaging machine 100 when no defect is detected by the detection unit 3 will be described.

As shown in FIG. 1, the sheet-shaped film F pulled out from the film roll R held by the film roll holding portion 10 is guided by the transport mechanism 40 to the movable roller 21 and the fixed roller 22 of the tension adjusting mechanism 20. , Is conveyed to the molding mechanism 30 through the printing mechanism 90. In the tension adjusting mechanism 20, a force is applied to the film F by the movable roller 21, and the tension of the film F to be conveyed is adjusted. The printing mechanism 90 prints predetermined information such as a manufacturing date at a predetermined position on the film F. In the former 31 of the molding mechanism 30, the sheet-shaped film F is molded into a tubular shape to form a tubular film FT. The tubular film FT is conveyed downward by the conveying mechanism 40, and the overlapping portion of the tubular film FT is sealed in the vertical direction by the vertical sealing mechanism 50. The tubular film FT on which the vertical sealing portion is formed by the vertical sealing mechanism 50 is further conveyed downward by the conveying mechanism 40, and the portion serving as the upper and lower ends of the bag B of the tubular film FT is laterally conveyed by the horizontal sealing mechanism 60. Is sealed to. The bag B on which the horizontal seal portion XT is formed by the horizontal seal mechanism 60 is a sewing machine on the horizontal seal portion XT formed between the bags B of the continuous packaging bag C by the cutter 71 of the perforation forming mechanism 80 (cutting mechanism 70). Form eyes P. When the number of bags B constituting the continuous packaging bag C reaches a predetermined number (11 in this case), the horizontal seal portion XT is cut in the lateral direction by the cutting mechanism 70, and a continuous packaging bag C in which the predetermined number of bags B are connected is manufactured. Will be done.

The article A is supplied to the inside of the tubular film FT serving as the bag B through the tube 32 of the molding mechanism 30 before the tubular film FT is sealed by the horizontal sealing mechanism 60. As a result, the bag making / packaging machine 100 manufactures a continuous packaging bag C in which a predetermined number of bags B containing the article A are arranged. The continuous packaging bag C manufactured by the bag making and packaging machine 100 is conveyed to the process on the downstream side by, for example, a conveyor arranged below the horizontal sealing mechanism 60.

Next, a case where a defect of at least one of the continuous packaging bag C and the article A is detected by the detection unit 3 during the above operation of the bag making / packaging machine 100 will be described. When a defect is detected by the detection unit 3, the control unit 4 prevents the horizontal seal mechanism 60 from forming the horizontal seal portion XT between the bags B, and instead of forming the horizontal seal portion XT between the bags B, the horizontal seal mechanism 60 is used as one of the bags included in the continuous bag C. An identification bag D having a size different from the normal size is manufactured, and the end portion of the identification bag D is cut by the cutting mechanism 70. As a result, the identification bag D is manufactured at the end of the continuous bag C including the defective bag B.

In addition, the notification unit 5 notifies that a defect has been detected. The user determines that the continuous bag C in which the identification bag D having a size different from the normal size is located at the end is a defective continuous bag, and removes the defective continuous bag from the product line.

After that, the control unit 4 manufactures the continuous packaging bag C by using the bag next to the cut identification bag D as the first bag B1.

(4) Features (4-1)
The bag-making / packaging machine 100 of the present embodiment is a bag-making / packaging machine that manufactures a continuous packaging bag C in which a plurality of bags B containing articles A are connected, and controls the bag-making unit 2 and the detection unit 3. It is provided with a part 4. The bag making section 2 manufactures a continuous bag C. The bag making portion 2 includes a cutting mechanism 70 for cutting the end portion of the bag B. The detection unit 3 detects defects in at least one of the continuous packaging bag C and the article A. The control unit 4 controls the bag making unit 2. When the detection unit 3 detects a defect, the control unit 4 manufactures an identification bag D having a size different from the normal size of the bag B as one of the bags included in the continuous bag C, and identifies the bag D by the cutting mechanism 70. Control to cut the end of the bag D.

In the bag making / packaging machine 100 of the present embodiment, when a defect of at least one of the continuous packaging bag C and the article A contained therein is detected, the bag is set as one of the bags included in the continuous packaging bag C. An identification bag D having a size different from the normal size of B is manufactured, and the end portion of the identification bag D is cut. Therefore, if the size of the bag located at the end of the continuous bag C is different from the normal size, it can be determined that the bag is a continuous bag C (defective product) including a defective bag. Therefore, even when the number of bags is large, the continuous bag C including the defective bag can be easily identified.

(4-2)
As described above, the bag making / packaging machine 100 of the present embodiment can easily identify a defective product only by looking at the bag (identification bag D) located at the end of the continuous packaging bag C. Therefore, the bag-making and packaging machine 100 of the present embodiment is suitably used for producing a continuous packaging bag C having more than 10 bags B, and more preferably used for producing a continuous packaging bag C having 20 or more bags B. Be done.

(4-3)
Further, the bag making / packaging machine 100 of the present embodiment is controlled by the control unit 4 to manufacture the identification bag D and by the cutting mechanism 70 to cut the end portion of the identification bag D. As a result, when it is detected that the defective bag B is included, it can be cut before the number of bags in the continuous bag C is reached, so that useless bags can be reduced.

From this point of view, the control unit 4 of the present embodiment controls that when the end portion of the identification bag D is cut, the continuous bag C is manufactured with the bag B next to the identification bag D as the first bag.

(4-4)
Here, when the control unit 4 detects the bite in the lateral seal portion XT between the kth bag and the (k + 1) th bag by the bite detection unit 3a, the control unit 4 detects the bite in the (k + 1) th bag and the (k + 2) th bag. The identification bag D is manufactured by not forming the horizontal seal portion XT between the bag and the bag. Then, the control unit 4 controls the cutting mechanism 70 to cut between the (k + 2) th bag and the (k + 3) th bag.

As a result, when biting occurs in the horizontal seal portion XT between the kth bag and the (k + 1) th bag, the identification bag D is manufactured by the (k + 1) th bag and the (k + 2) th bag. It is cut at the end of the (k + 2) th bag. Therefore, after the identification bag D is manufactured, it can be cut before the number of bags of the continuous packaging bag C is reached, so that the useless bag B can be reduced.

(5) Modification Example The following is a modification of the above embodiment. In addition, a part or all of the contents of each modification may be combined with the contents of the above-described embodiment and the contents of other modifications to the extent that they do not contradict each other.

(5-1) Modification A
In the above embodiment, the detection unit 3 detects defects in at least one of the continuous packaging bag C and the article A that occur in the weighing machine 1 and the bag making / packaging machine 100. In this modification, in addition to the weighing machine 1 and the bag-making / packaging machine 100, defects in the article A that occur in the transporting machine (not shown) in which the article A is conveyed to the weighing machine 1 are further detected.

(5-2) Modification B
In the above embodiment, the detection unit 3 determines that at least one of the continuous packaging bag C and the article A is defective, such as a defective biting of the article A in the horizontal seal portion XT, a defective printing of the bag B, and a defect to the bag B. Detects, but is not limited to, defective foreign matter contamination, defective weighing of article A, and defective bag B having a seam in the film F accommodating article A. The detection unit 3 may further detect a seal defect in the vertical seal mechanism 50.

(5-3) Modification C
In the above embodiment, the control by the control unit 4 when at least one of the print detection unit 3b, the foreign matter detection unit 3c, the measurement detection unit 3d, and the seam detection unit 3e can identify a defective bag has been described. When the print detection unit 3b, the foreign matter detection unit 3c, the measurement detection unit 3d, and the seam detection unit 3e cannot identify the defective bag as the kth bag, the control unit 4 is the kth bag and the (k + 1) th bag. The control that the horizontal seal portion XT is not formed between the bag and the bag is not performed.

Specifically, the control unit 4 of this modified example controls to manufacture the identification bag D as shown in FIG. 4 when it detects a defect in biting of an article, but detects a defect such as a printing defect. When this is done, the control for manufacturing the identification bag D is not performed as shown in FIG.

(5-4) Modification D
In the above embodiment, the control unit 4 controls to manufacture an identification bag having a length that is an integral multiple of the normal size of the bag B, but is not limited to this. In this modification, the bag B is made of a transparent film, and the identification bag D has a length that is not an integral multiple of the normal size. Specifically, the identification bag D of this modification has, for example, a length 1.5 times the normal size. In this modification, the printing mechanism 90 is omitted.

(5-5) Modification E
In the above embodiment, the cutter of the perforation mechanism 80 is common to the cutter 71 of the cutting mechanism 70. In this modification, the cutter of the perforation forming mechanism 80 is not common to the cutter 71 of the cutting mechanism 70, but is a separate member.

1: Weighing machine 2: Bag making unit 3: Detection unit 4: Control unit 5: Notification unit 10: Film roll holding unit 20: Tension adjustment mechanism 30: Molding mechanism 40: Conveying mechanism 50: Vertical sealing mechanism 60: Horizontal sealing mechanism 70: Cutting mechanism 80: Perforation forming mechanism 90: Printing mechanism 100: Bag making and packaging machine A: Article B: Bag C: Continuous packaging bag D: Identification bag P: Perforation XT: Horizontal seal

Japanese Unexamined Patent Publication No. 2004-352287

Claims (10)

A bag-making and packaging machine that manufactures a continuous packaging bag in which a plurality of bags containing goods are connected.
The bag making section that manufactures the continuous bag and
A detection unit that detects defects in at least one of the bag and the article, and
A control unit that controls the bag making unit and
With
The bag making portion includes a cutting mechanism for cutting the end portion of the bag.
When the detection unit detects a defect, the control unit manufactures an identification bag having a size different from the normal size of the bag as one of the bags included in the continuous packaging bag, and the identification bag is identified by the cutting mechanism. Control to cut the end of the bag,
Bag making and packaging machine. The bag making portion further includes a horizontal sealing mechanism for forming a horizontal sealing portion on the bag by laterally sealing the film containing the article.
The detection unit detects the biting of the article in the lateral seal portion.
The bag-making and packaging machine according to claim 1. When the detection unit detects the biting of the k-th bag and the (k + 1) -th bag in the lateral seal portion, the control unit detects the (k + 1) -th bag and the (k + 2) -th bag. The identification bag is manufactured by not forming the horizontal seal portion between the bag and the bag.
The bag-making and packaging machine according to claim 2. The control unit controls the cutting mechanism to cut between the (k + 2) th bag and the (k + 3) th bag.
The bag-making and packaging machine according to claim 3. The bag making portion further includes a perforation forming mechanism for forming a perforation between the continuous bags.
When the control unit does not cut the horizontal seal portion, the control unit forms the perforation in the horizontal seal portion by the perforation forming mechanism.
The bag-making and packaging machine according to claim 4. The detection unit considers that at least one of the continuous bag and the article is defective, such as a defective printing of the bag, a defective mixing of foreign matter into the bag, a defective weighing of the article, and the bag. Detects at least one of the seamed defects in the film containing the article,
The bag-making and packaging machine according to any one of claims 1 to 5. The continuous bag has more than 10 bags.
The bag-making and packaging machine according to any one of claims 1 to 6. A notification unit for notifying that a defect has been detected by the detection unit is further provided.
The bag-making and packaging machine according to any one of claims 1 to 7. When the end portion of the identification bag is cut, the control unit controls to manufacture the continuous bag with the bag next to the identification bag as the first bag.
The bag-making and packaging machine according to any one of claims 1 to 8. The control unit controls to manufacture the identification bag having a length that is an integral multiple of the normal size of the bag.
The bag-making and packaging machine according to any one of claims 1 to 9.

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