CN107074390B

CN107074390B - Bag making and packaging machine

Info

Publication number: CN107074390B
Application number: CN201580062768.4A
Authority: CN
Inventors: 宫本秀史; 近藤真史; 佐藤良一; 小池伸治
Original assignee: Ishida Co Ltd
Current assignee: Ishida Co Ltd
Priority date: 2015-01-15
Filing date: 2015-10-09
Publication date: 2020-01-03
Anticipated expiration: 2035-10-09
Also published as: US20180016047A1; EP3246262A1; CN107074390A; WO2016113962A1; EP3246262A4; JP2016132454A; AU2015377541B2; AU2015377541A1; EP3246262B1

Abstract

A bag-making and packaging machine (100) is provided with a conveying mechanism (10), a roller holding section (20), a printing mechanism (30), a forming machine (60), a longitudinal sealing mechanism (70), a transverse sealing mechanism (75), a cutting mechanism (80), a first sensor (91), and a second sensor (92). The printing mechanism (30) prints information on the film (F). The forming machine (60) makes two longitudinal edges of the film (F) overlapped. A vertical sealing mechanism (70) bonds the two vertical edges to produce a Film Tube (FT). The transverse sealing mechanism (75) is adhered via a membrane cylinder (FT) to manufacture a transverse sealing part. A cutting mechanism (80) cuts the Film Tube (FT) in the transverse sealing part. A first sensor (91) detects the mark of the film (F) to determine a cutting position at which the film cartridge (FT) should be cut. A second sensor (92) detects the mark to determine a print position at which the film (F) should be printed with predetermined information.

Description

Bag making and packaging machine

Technical Field

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

Background

The bag-making and packaging machine draws a packaging film from a film roll, makes a bag from the film, and packages an article with the bag. The film is printed with marks regularly at predetermined intervals. The bag-making and packaging machine prints predetermined information such as the date of manufacture at an appropriate position of the film by detecting the mark using a sensor, and cuts off the film in a bag shape at an appropriate position to discharge the individual packaged articles.

The bag-making and packaging machine disclosed in patent document 1 (japanese patent No. 3971833) includes a sensor for detecting a mark.

Disclosure of Invention

Problems to be solved by the invention

In a factory where packaged articles are manufactured, the operation of the bag-making and packaging machine is temporarily stopped immediately before a winding roll is used up. Next, a new film roll is set on the bag-making and packaging machine by an operator, and the terminal end of the previous film is joined to the leading end of the film of the new roll by an adhesive tape or the like. Thereafter, the operation of the bag-making and packaging machine is started again.

In general, since the positional relationship between the two films is not adjusted at the joining portion of the films, the interval between the marks adjacent to each other across the joining portion becomes inappropriate. Therefore, a positional shift of printing or cutting may be caused in the vicinity of the joining portion of the film. The range of the film in which such positional displacement occurs may extend over the conveyance path between the farthest cutting mechanism, the printing mechanism, and the sensor for detecting the mark. The film portion having such positional deviation must be discarded.

The invention aims to reduce the amount of film that must be discarded in a bag-making and packaging machine.

Means for solving the problems

The bag-making and packaging machine of the first aspect of the present invention packages an article with a bag made of a film printed with marks at regular intervals in the longitudinal direction. The spacing is the size of the pouch from the first edge to the second edge. The second side is a side opposite to the first side. The bag-making and packaging machine is provided with a conveying mechanism, a roller holding part, a printing mechanism, a forming machine, a longitudinal sealing mechanism, a transverse sealing mechanism, a cutting mechanism, a first sensor and a second sensor. The transport mechanism transports the film from upstream to downstream. The roller holding section holds the film roller around which the film is wound. The printing mechanism is disposed downstream of the roller holding portion and prints predetermined information on the film. The former is arranged downstream of the printing mechanism so that the two longitudinal edges of the film coincide. The longitudinal sealing mechanism is disposed downstream of the molding machine, and the two overlapped longitudinal edges are bonded to produce a film tube. The transverse sealing mechanism is arranged at the downstream of the longitudinal sealing mechanism, and a transverse sealing part is manufactured on the film cylinder by adhering two opposite parts of the film cylinder, wherein the transverse sealing part extends along the transverse direction. The transverse direction is perpendicular to the longitudinal direction. The cutting mechanism is disposed downstream of the longitudinal sealing mechanism and cuts the film tube at the transverse sealing portion. The first sensor detects the mark to determine a cutting position at which the film cartridge should be cut. The second sensor detects the mark to determine a print position at which the film should be printed with predetermined information.

According to this configuration, the bag-making and packaging machine has the first sensor corresponding to the cutting mechanism and the second sensor corresponding to the printing mechanism. Therefore, the printing mechanism and the cutting mechanism can be operated at optimum timings, respectively, and thus the amount of the film that must be discarded can be reduced.

A bag-making and packaging machine according to a second aspect of the present invention is the bag-making and packaging machine according to the first aspect, wherein the second sensor is disposed upstream of the printing mechanism.

According to this configuration, the printing mechanism can use the detection signal of the second sensor disposed upstream of the printing mechanism itself, and therefore can operate at an appropriate timing.

A bag-making and packaging machine according to a third aspect of the present invention is the bag-making and packaging machine according to the first or second aspect, wherein the first sensor is disposed downstream of the longitudinal sealing mechanism and upstream of the cutting mechanism.

According to this configuration, since the length of the conveyance path from the first sensor to the cutting mechanism is short, the influence of the position measurement error of the film grasped by the control circuit is small. Therefore, the cutting mechanism can be operated at more accurate timing.

A bag-making and packaging machine according to a fourth aspect of the present invention is the bag-making and packaging machine according to the first or second aspect, wherein the first sensor is disposed downstream of the printing mechanism and upstream of the forming machine.

According to this configuration, the first sensor used to operate the cutting mechanism at an appropriate timing can be disposed at a location where it is easy to install.

A bag-making and packaging machine according to a fifth aspect of the present invention is the bag-making and packaging machine according to any one of the first to fourth aspects, wherein a length of a conveying path from the roller holding portion to the printing mechanism is 3 times or more a size of the bag.

According to this configuration, although the length of the conveyance path from the roller holding portion to the printing mechanism is long, the amount of the film that must be discarded can be reduced.

A bag-making and packaging machine according to a sixth aspect of the present invention is the bag-making and packaging machine according to any one of the first to fifth aspects, wherein the length of the conveying path from the printing mechanism cutting mechanism to the printing mechanism cutting mechanism is 3 times or more the size of the bag.

According to this configuration, although the length of the transport path from the printing mechanism to the cutting mechanism is long, the amount of the film that must be discarded can be reduced.

A bag-making and packaging machine according to a seventh aspect of the present invention is the bag-making and packaging machine according to any one of the first through sixth aspects, further including a printing inspection mechanism and a third sensor. The printing inspection mechanism checks whether predetermined information is properly printed. The third sensor detects the mark to determine the timing of operating the printing inspection mechanism. The third sensor is disposed upstream of the printing inspection mechanism.

According to this configuration, the bag-making and packaging machine has the printing inspection mechanism and the third sensor corresponding thereto. Therefore, the information printed on the film by the printing mechanism can be confirmed with high accuracy.

A bag-making and packaging machine according to an eighth aspect of the present invention is the bag-making and packaging machine according to any one of the first through seventh aspects, further comprising a conveying length varying mechanism. The transport length varying mechanism varies a length of the film transported by the transport mechanism, which transports the film, from the printing mechanism to the cutting mechanism. The transport mechanism can stop every time the film is transported by the amount of the size of the bag. In this stop, both the printing mechanism and the cutting mechanism operate.

According to this configuration, since the conveyance of the film is stopped only at the timing when the printing mechanism and the cutting mechanism operate simultaneously, the processing speed of the bag-making and packaging machine is improved. Further, since the position of the film is checked twice by the two sensors, the accuracy of checking the conveyance state is improved.

A bag-making and packaging machine according to a ninth aspect of the present invention is the bag-making and packaging machine according to any one of the first aspect to the eighth aspect, wherein the conveying mechanism is capable of stopping twice every time the film is conveyed by the size of the bag. In the first stop, one of the printing mechanism and the cutting mechanism operates. In the second stop, the other of the printing mechanism and the cutting mechanism operates.

According to this configuration, the processing speed of the bag-making and packaging machine is improved.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the bag-making and packaging machine of the present invention, the amount of film that must be discarded can be reduced.

Drawings

Fig. 1 is a schematic diagram showing a structure of a bag-making and packaging machine 100 according to a first embodiment of the present invention.

Fig. 2 is a top view of the film F.

Fig. 3 is a perspective view of the film cartridge FT being longitudinally sealed.

Fig. 4 is a perspective view of the film cartridge FT being sealed laterally.

Fig. 5 is a block diagram showing a control circuit 200 mounted on the bag-making and packaging machine 100 of fig. 1.

Fig. 6 is a schematic diagram showing the structure of a bag-making and packaging machine 100A according to a second embodiment of the present invention.

Fig. 7 is a schematic diagram showing the structure of a bag-making and packaging machine 100B according to a third embodiment of the present invention.

Detailed Description

< first embodiment >

(1) Is formed integrally

Fig. 1 shows the configuration of a bag-making and packaging machine 100 according to a first embodiment of the present invention. The bag-making and packaging machine 100 includes a conveying mechanism 10, a roller holding section 20, a printing mechanism 30, a printing inspection mechanism 40, a conveying length variable mechanism 50, a forming machine 60, a vertical sealing mechanism 70, a horizontal sealing mechanism 75, a cutting mechanism 80, a first sensor 91, and a second sensor 92.

(2) Detailed constitution

(2-1) conveying mechanism 10

The conveying mechanism 10 conveys the packaging film F taken out from the roller holding portion 20.

Fig. 2 shows the film F. The film F extends long in the longitudinal direction L and has a certain width expanded in the transverse direction W perpendicular to the longitudinal direction L. On the film F, a pattern to be used as a pouch for commodity packaging is repeatedly printed in each dimension D. Further, marks M are printed on the film F at intervals of the dimension D in the longitudinal direction L. When the film F is finally processed into a bag, the dimension D becomes the distance between the upper and lower edges of the bag or the distance between the left and right edges of the bag due to the design of the bag.

Returning to fig. 1, in the course of the film F being conveyed by the conveying mechanism 10, the film F is processed into a bag shape. The conveying mechanism 10 finally discharges the packaged article WP after packaging.

The conveying mechanism 10 includes a plurality of rollers not denoted with reference numerals, a pull-down belt 15, a discharge conveyor 19, and a conveying length varying mechanism 50 described later.

(2-2) roller holding part 20

The roller holding portion 20 is provided upstream of the conveying path formed by the conveying mechanism 10. The roller holding portion 20 holds the film roller FR. The film roll FR has a core material and a film F wound around the core material and long in the longitudinal direction.

The conveying mechanism 10 holds one end of the film F and draws out the film F from the roller holding portion 20.

(2-3) printing mechanism 30

The printing mechanism 30 prints predetermined information such as the date of manufacture at an appropriate position of the film F being conveyed. Thereby, predetermined information is printed on each of the packaged articles WP finally discharged from the bag-making and packaging machine 100.

The length of the transport path from the roller holding portion 20 to the printing mechanism 30 is 3 times or more the size D of the bag. Thereby, a space for arranging the roller holding portion 20 to the printing mechanism 30 is easily obtained.

(2-4) print inspection mechanism 40

The printing inspection mechanism 40 is constituted by a camera.

The printing inspection mechanism 40 inspects whether or not the predetermined information printed by the printing mechanism 30 is printed on the film F in a correct manner. Specifically, the print inspection mechanism 40 determines whether the print definition, the content of information, the print position, and the like are appropriate or inappropriate.

(2-5) conveying Length variable mechanism 50

The transport length varying mechanism 50 is one of the components of the transport mechanism 10, and changes the position of the member for adjusting the length of the transport path of the film F between the printing mechanism 30 and the cutting mechanism 80.

The transport length varying mechanism 50 includes a movable roller 51 and a fixed roller 52. The film F is conveyed from upstream to the movable roller 51, then to the fixed roller 52, and from there to the former 60 at the subsequent stage.

The rotation shaft of the movable roller 51 is moved in the moving direction S by a moving mechanism not shown. The fixed roller 52 can rotate at a certain position. By the movement of the movable roller 51, the length of the conveyance path of the film F is changed.

(2-6) Molding machine 60

The former 60 is used to wind up the film F conveyed in a flat state and to overlap both longitudinal edges of the film F. The molding machine 60 has a cylindrical member. The inner space of the cylindrical member is used as a filling path for filling the bag formed of the film F with an article to be packaged.

(2-7) longitudinal seal mechanism 70

The longitudinal sealing mechanism 70 adheres both longitudinal edges of the film F overlapped by the forming machine 60. The longitudinal sealing mechanism 70 has a heater. The heat generated by the heater temporarily softens the overlapped portion of the film F, thereby performing adhesion.

Fig. 3 shows a film cartridge FT having a cartridge shape, which is manufactured by adhesion. The film cartridge FT is provided with a vertical seal portion SL by adhesion.

(2-8) transverse sealing mechanism 75

Returning to fig. 1, the lateral sealing mechanism 75 adheres two opposing portions of the film cartridge FT.

The transverse sealing mechanism 75 includes a first member 751 and a second member 752 that face each other with a conveyance path therebetween. The first member 751 and the second member 752 can be moved toward and away from each other by a motor not shown. The first and

second members

751 and 752 each have a heater.

The adhesion of the membrane cartridge FT is performed in the following manner. First, the first member 751 and the second member 752 approach each other to press the membrane cartridge FT. The two portions of the membrane cartridge FT facing each other across the internal space are pressed. The pressing is performed over the entire width of the film cartridge FT in the width direction. Next, the heater of the first member 751 and the second member 752 applies heat to the pressed portion of the cartridge FT. This softens and adheres the pressed portion. Finally, the first member 751 and the second member 752 stop being pressed and separated from each other.

Fig. 4 shows the film cartridge FT subjected to the adhesion treatment by the lateral sealing mechanism 75. The film cartridge FT has a lateral seal portion SW formed by an adhesion process of the lateral seal mechanism 75.

Returning to fig. 1, each time the operation of the transverse sealing mechanism 75 is finished, a bag of the product is filled into the film tube FT via the internal space of the molding machine 60.

(2-9) cutting mechanism 80

The cutting mechanism 80 is provided in the transverse sealing mechanism 75. The cutting mechanism 80 includes a cutter 801 and a housing 802. The cutter 801 is provided on the first member 751 and can be extended and retracted. The housing portion 802 is provided on the second member 752 and can house the extended cutter 801.

Fig. 4 shows a cutting position CP at which the cutting mechanism 80 performs cutting. The cut-off position CP is located at the lateral seal portion SW.

Returning to fig. 1, in the cutting operation of the cutting mechanism 80, the cutter 801 extends toward the housing 802. Thereby, the individual packaged article WP is cut open.

The length of the transport path from the printing mechanism 30 to the cutting mechanism 80 is 3 times or more the size D of the bag. This makes it easy to obtain a space for arranging the printing mechanism 30 to the cutting mechanism 80.

(2-10) first sensor 91

The first sensor 91 detects a mark M (fig. 2) printed on the film F in order to determine a cutting position CP (fig. 4) at which the film cartridge FT should be cut.

The first sensor 91 is disposed upstream of the cutting mechanism 80 in the conveyance path, specifically, between the printing inspection mechanism 40 and the conveyance length variable mechanism 50.

(2-11) second sensor 92

The second sensor 92 detects a mark M (fig. 2) printed on the film F in order to determine a printing position on the film F at which predetermined information is to be printed.

The second sensor 92 is disposed upstream of the printing mechanism 30 in the conveyance path.

(3) Control circuit

(3-1) integral constitution

Fig. 5 shows a control circuit 200 for controlling the bag-making and packaging machine 100. The control circuit 200 includes a CPU210 and a memory 220. The CPU210 has a set of input ports and a set of output ports.

(3-2) input

A first detection unit 231, a second detection unit 232, an image processing unit 233, and an operation panel control unit 271 are connected to an input port of the CPU 210.

The first detection unit 231 converts the signal of the first sensor 91 into a mark detection signal.

The second detection unit 232 converts the signal of the second sensor 92 into a mark detection signal.

The image processing unit 233 processes or processes data output from the printing inspection mechanism 40.

The operation panel control unit 271 processes information input by the user via an operation panel 270 attached to the bag-making and packaging machine 100 for various settings, and causes the CPU210 to read the information.

(3-3) output

To the output port of the CPU210, a roller motor drive circuit 251, a roller rotation shaft movement motor drive circuit 252, a print mechanism drive circuit 253, a heater drive circuit 254, a motor and heater drive circuit 255, and a solenoid drive circuit 256 are connected.

The roller motor drive circuit 251 generates a current for driving a motor that rotates various rollers included in the conveyance mechanism 10.

The roller rotation shaft movement motor drive circuit 252 generates a current for driving a motor included in a movement mechanism that moves the rotation shaft of the movable roller 51.

The printing mechanism drive circuit 253 generates a signal or a current for controlling the printing mechanism 30.

The heater drive circuit 254 generates an electric current that controls the heaters of the longitudinal sealing mechanism 70.

The motor and heater drive circuit 255 generates signals or currents that control the motor and heater of the cross sealing mechanism 75.

The solenoid drive circuit 256 generates a current that controls a solenoid responsible for extension and retraction of the cutter 801 of the cutting mechanism 80.

(3-4) Central processing

The CPU210 detects the mark of the film F via the first sensor 91 and the second sensor 92. In addition, the CPU210 controls motors that rotate various rollers included in the conveyance mechanism 10.

Therefore, the CPU210 can grasp at which position the mark of the film F exists at an arbitrary timing.

(4) Work by

Referring back to fig. 1, the "continuous operation" performed by bag-making and packaging machine 100 will be described.

The conveying mechanism 10 conveys the film F at a constant conveying speed at all times.

Since the control circuit 200 (fig. 5) grasps the timing at which the second sensor 92 detects the mark M and the distance after which the film F is conveyed, the timing at which the printing mechanism 30 should operate is calculated from these values. After that, the control circuit 200 controls the printing mechanism 30 at the calculated timing, and prints predetermined information at an appropriate position of the film F.

The film F is further continuously conveyed. Since the control circuit 200 grasps the timing at which the second sensor 92 detects the mark M and the distance after which the film F is conveyed, the timing at which the printing inspection mechanism 40 should operate is calculated from these values. Then, the control circuit 200 controls the printing inspection mechanism 40 at the calculated timing to acquire and inspect an image of the film F to be inspected.

Next, the film F passes through the conveying length varying mechanism 50, and is then wound up by the forming machine 60, so that both longitudinal edges of the film F overlap. The longitudinal sealing mechanism 70 heats the overlapping portion. Thereby, the overlapped portion is bonded to form the film tube FT having the vertical seal portion SL (fig. 3).

In the membrane cartridge FT, a bag of the product was filled in the previous cycle. The horizontal sealing mechanism 75 forms a horizontal sealing portion SW at a position higher than the portion where the article is stored in the film tube FT (fig. 4). The cutting mechanism 80 cuts the cutting position CP (fig. 4) located at the lateral seal portion SW. The timing at which the transverse sealing mechanism 75 and the cutting mechanism 80 operate is determined by the control circuit 200 (fig. 5) based on the timing at which the first sensor 91 detects the mark M and the distance after which the film F is conveyed.

The thus cut individual packaged articles WP are discharged from the bag-making and packaging machine 100 by the discharge conveyor 19.

(5) Feature(s)

(5－1)

The bag-making and packaging machine 100 is provided with two sensors for detecting the mark M. That is, the first sensor 91 corresponding to the cutting mechanism 80 and the second sensor 92 corresponding to the printing mechanism 30. Therefore, even when the joint portion reaches the transport mechanism 10 due to the supplement of the film roller FR and the interval between the adjacent marks M is an inappropriate value other than the dimension D, the printing mechanism 30 and the cutting mechanism 80 can be operated at the optimum timings. Therefore, the amount of the film F that must be discarded can be reduced.

(5－2)

The second sensor 92 is disposed upstream of the printing mechanism 30. The printing mechanism 30 can use the detection signal of the second sensor 92 disposed upstream of the printing mechanism 30 itself, and therefore can operate at an appropriate timing.

(5－3)

The first sensor 91 used to operate the cutting mechanism 80 at an appropriate timing is disposed downstream of the printing mechanism 30 and upstream of the molding machine 60. In this region, the conveyance path extends linearly. In addition, the film F conveyed in this region is sheet-like and has not been wound up. Therefore, the first sensor 91 is easily mounted in this area.

(5－4)

The length of the transport path from the roller holding portion 20 to the printing mechanism 30 is 3 times or more the size D of the bag. According to this configuration, regardless of the long conveyance path from the roller holding portion 20 to the printing mechanism 30, the amount of the film F that must be discarded can be reduced.

(5－5)

The length of the transport path from the printing mechanism 30 to the cutting mechanism 80 is 3 times or more the size D of the bag. According to this configuration, although the transport path from the printing mechanism 30 to the cutting mechanism 80 is long, the amount of the film F that must be discarded can be reduced.

(6) Modification example

A modification of the first embodiment is shown below.

(6-1) first modification 1A

(6-1-1) working

The bag-making and packaging machine 100 according to the first modification 1A of the first embodiment is the same as the bag-making and packaging machine 100 according to the first embodiment shown in fig. 1 in the mechanical configuration. However, in the operation mode, the bag-making and packaging machine 100 of the first modification 1A performs the "intermittent operation" instead of the "continuous operation" described above. That is, the conveyance and the stop of the film F are repeated.

The conveying mechanism 10 is temporarily stopped every time the film F is conveyed by the size D (fig. 2) of the pocket. During the stop, both the printing mechanism 30 and the cutting mechanism 80 operate.

Since both the printing mechanism 30 and the cutting mechanism 80 can be operated at the same time, the length of the conveyance path from the printing mechanism 30 to the cutting mechanism 80 is changed to an optimum value by the conveyance length changing mechanism 50 before the packaging operation. This can suppress the occurrence of misalignment between printing and cutting positions.

The timing at which the conveyance is stopped is determined by the control circuit 200 based on the timing at which the second sensor 92 detects the mark M and the distance after which the film F is conveyed. In addition, the control circuit 200 can check whether or not the film F is properly conveyed at a desired timing by detecting the timing of the mark M using the first sensor 91.

When the joined portion of the film enters the conveyance path, the second sensor 92 calculates the difference between the separation distance of the marks M adjacent to each other across the joined portion and the size D of the bag. The control circuit 200 controls the conveyance length variable mechanism 50 based on the value of the difference, thereby adjusting the length of the conveyance distance from the printing mechanism 30 to the cutting mechanism 80. Thus, even if a portion in which the intervals of the marks M are misaligned appears in the film F, printing and cutting can be appropriately performed.

(6-1-2) feature

According to this configuration, the conveyance of the film F is stopped only at the timing when the printing mechanism 30 and the cutting mechanism 80 operate simultaneously, and therefore the processing speed of the bag-making and packaging machine 100 is improved. Further, since the position of the film F is checked twice by the two sensors, the accuracy of checking the conveyance state is improved.

(6-2) first modification 1B

(6-2-1) working

The bag-making and packaging machine 100 of the first modification 1B performs an intermittent operation different from the first modification 1A described above.

The conveyance mechanism 10 can perform the intermittent operation with two temporary conveyance stops in addition to the intermittent operation with one temporary conveyance stop described in the first modification 1A. That is, the conveying mechanism 10 is stopped twice each time the film F is conveyed by the size D (fig. 2) of the pocket. During the first conveyance stop, the printing mechanism 30 prints predetermined information on the film F. During the second conveyance stop, the cutting mechanism 80 cuts the lateral seal portion SW of the film cartridge FT.

The timing of the first conveyance stop is determined by the control circuit 200 based on the timing at which the second sensor 92 detects the mark M and the distance after which the film F is conveyed. The timing of the second conveyance stop is determined by the control circuit 200 based on the timing at which the first sensor 91 detects the mark M and the distance after which the film F is conveyed.

Before the packaging operation of the bag-making and packaging machine 100 is started, the length of the conveying path of the film F between the printing mechanism 30 and the cutting mechanism 80 is appropriately adjusted by the conveying length variable mechanism 50. Thus, the bag-making and packaging machine 100 can perform the intermittent operation accompanied by one temporary conveyance stop in a normal state, and can perform the intermittent operation accompanied by two temporary conveyance stops in the vicinity of the joining portion of the film F.

(6-2-2) feature

With this configuration, the conveying-length varying mechanism 50 does not need to be operated as long as the bag-making and packaging machine 100 continuously produces the same type of packaged articles using the same type of film F. As a result, the processing speed of the bag-making and packaging machine 100 is further improved.

< second embodiment >

(1) Form a

Fig. 6 shows the configuration of a bag-making and packaging machine 100A according to a second embodiment of the present invention. The position of arrangement of the first sensor 91 of the bag-making and packaging machine 100A is different from that of the bag-making and packaging machine 100 of the first embodiment. The first sensor 91 is disposed downstream of the longitudinal seal mechanism 70 and upstream of the cutting mechanism 80.

(2) Feature(s)

In order to determine the timing of the cutting operation, the cutting mechanism 80 may use a detection signal of the first sensor 91 disposed upstream of the cutting mechanism 80 itself and in the vicinity of the cutting mechanism 80 itself. Therefore, since the length of the conveyance path from the first sensor 91 to the cutting mechanism 80 is short, the position of the film F grasped by the control circuit 200 has little concern about measurement errors. As a result, the cutting mechanism 80 can operate at more accurate timing.

(3) Modification example

The intermittent operation of the first modification 1A or the second modification 1B of the first embodiment may be applied to the bag-making and packaging machine 100A of the second embodiment.

< third embodiment >

(1) Form a

Fig. 7 shows the structure of a bag-making and packaging machine 100B according to a third embodiment of the present invention. In the bag making and packaging machine 100B, the positions of the first sensor 91 and the second sensor 92 are the same as those of the bag making and packaging machine 100 of the first embodiment. However, the bag-making and packaging machine 100B is different from the bag-making and packaging machine 100 of the first embodiment in that the third sensor 93 is further provided.

The third sensor 93 is used to detect the mark M in order to determine the timing of operating the printing inspection mechanism 40. The third sensor 93 is disposed upstream of the printing inspection mechanism 40 in the conveyance path, specifically, between the printing inspection mechanism 40 and the printing mechanism 30.

(2) Feature(s)

The bag-making and packaging machine 100B has the printing inspection mechanism 40 and the third sensor 93 corresponding thereto. Therefore, the information printed on the film F by the printing mechanism 30 can be confirmed with high accuracy.

(3) Modification example

The intermittent operation of the first modification 1A or the second modification 1B of the first embodiment may be applied to the bag-making and packaging machine 100B of the third embodiment.

Description of the reference numerals

F film

FR film roller

WP packaging article

10 conveying mechanism

20 roller holding part

30 printing mechanism

40 printing inspection mechanism

50 conveying length variable mechanism

51 Movable roller

52 fixed roller

60 forming machine

70 longitudinal sealing mechanism

75 transverse sealing mechanism

80 cutting mechanism

91 first sensor (sensor for cutting)

92 second sensor (sensor for printing)

93 third sensor (sensor for printing inspection)

100. 100A, 100B bag-making packaging machine

Documents of the prior art

Patent document

Patent document 1: japanese patent No. 3971833

Claims

1. A bag making and packaging machine that packages an article with bags made of a film on which marks are printed at intervals in a longitudinal direction, the intervals being a size from a first edge to a second edge opposite to the first edge, the bag making and packaging machine comprising:

a conveying mechanism that conveys the film from upstream to downstream;

a roller holding section that holds a film roller around which the film is wound;

a printing mechanism disposed downstream of the roller holding portion and configured to print predetermined information on the film;

a forming machine disposed downstream of the printing mechanism and configured to overlap two longitudinal edges of the film;

a longitudinal sealing mechanism disposed downstream of the molding machine for adhering the two overlapped longitudinal edges to produce a film tube;

a transverse sealing mechanism arranged downstream of the longitudinal sealing mechanism, for producing a transverse sealing portion on the film tube by adhering two opposite portions of the film tube, the transverse sealing portion extending in a transverse direction perpendicular to the longitudinal direction;

a cutting mechanism disposed downstream of the longitudinal sealing mechanism and configured to cut the film tube at the transverse sealing portion;

a first sensor that detects the mark to determine a cutting position at which the film cartridge should be cut; and

a second sensor that detects the mark to determine a printing position at which the film should be printed with the predetermined information,

the first sensor is disposed at a position upstream of the cutting mechanism and downstream of the printing mechanism,

the second sensor is disposed upstream of the printing mechanism.

2. The bag-making and packaging machine of claim 1,

the first sensor is disposed downstream of the longitudinal sealing mechanism.

3. The bag-making and packaging machine according to claim 1 or 2,

the first sensor is disposed upstream of the forming machine.

4. The bag-making and packaging machine according to claim 1 or 2,

a length of a transport path from the roller holding portion to the printing mechanism is 3 times or more the size of the bag.

5. The bag-making and packaging machine according to claim 1 or 2,

the length of a transport path from the printing mechanism to the cutting mechanism is 3 times or more the size of the bag.

6. The bag-making and packaging machine according to claim 1 or 2,

the bag-making and packaging machine further includes:

a print checking mechanism that checks whether the predetermined information is properly printed; and

a third sensor that detects the mark to determine a timing of operating the printing inspection mechanism,

the third sensor is disposed upstream of the printing inspection mechanism.

7. The bag-making and packaging machine according to claim 1 or 2,

the bag-making and packaging machine further includes a conveying length-variable mechanism that changes a length of the film conveyed by the conveying mechanism from the printing mechanism to the cutting mechanism,

the conveying mechanism can be stopped once every time the film is conveyed by the size of the bag,

in this stop, both the printing mechanism and the cutting mechanism operate.

8. The bag-making and packaging machine according to claim 1 or 2,

the conveying mechanism can stop twice each time the film is conveyed by the size of the bag,

one of the printing mechanism and the cutting mechanism operates in a first stop,

in the second stop, the other of the printing mechanism and the cutting mechanism operates.