JP7224643B2 - bag making and packaging machine - Google Patents

Description

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

A bag making and packaging machine draws out a packaging film from a film roll, makes a bag from the film, and packages an article with the bag. Marks are regularly printed on the film in advance at regular intervals. The bag-making and packaging machine prints predetermined information such as the date of manufacture at an appropriate position on the film by detecting the mark using a sensor, and cuts the bag-shaped film at an appropriate position. to discharge the individual packaged goods.

A bag making and packaging machine disclosed in Patent Document 1 (Japanese Patent No. 3971833) includes one mark detection sensor.

In a factory that manufactures packaged goods, the operation of the bag making and packaging machine is temporarily stopped just before one film roll is used up. Next, an operator sets a new film roll on the bag-making and packaging machine, and joins the end of the previous film and the leading end of the film of the new roll with an adhesive tape or the like. After that, the operation of the bag making and packaging machine is resumed.

Normally, the positional relationship between the two films is not aligned at the junction of the films, so the spacing between adjacent marks across the junction is inappropriate. Therefore, misalignment of printing and cutting may occur in the vicinity of the joint portion of the film. The range in which such misregistration occurs in the film can cover the transport path between the two of the cutting mechanism, the printing mechanism, and the sensor for detecting marks, which are the furthest apart. Film portions with such misalignment must be discarded.

SUMMARY OF THE INVENTION An object of the present invention is to reduce the amount of film that must be discarded in a bag making and packaging machine.

A bag making and packaging machine according to the first aspect of the present invention packages articles in bags made of a film on which marks are printed at regular intervals in the vertical direction. The spacing is the dimension from the first side to the second side of the bag. The second side is the side opposite the first side. The bag making and packaging machine includes a conveying mechanism, a roll holding section, a printing mechanism, a former, a vertical sealing mechanism, a horizontal sealing mechanism, a cutting mechanism, a first sensor, and a second sensor. The transport mechanism transports the film from upstream to downstream. The roll holding section holds a film roll around which the film is wound. The printing mechanism is arranged downstream of the roll holder and prints predetermined information on the film. A former is positioned downstream of the printing mechanism and overlaps the two longitudinal edges of the film. A vertical sealing mechanism is located downstream of the former and seals the two overlapping vertical edges to create a film tube. The horizontal sealing mechanism is arranged downstream of the vertical sealing mechanism and forms a horizontal sealing portion extending in the horizontal direction on the film tube by bonding two opposing portions of the film tube together. The horizontal direction is perpendicular to the vertical direction. The cutting mechanism is arranged downstream of the vertical sealing mechanism and cuts the film tube at the horizontal sealing portion. A first sensor senses the mark to identify the cutting position of the film tube to be cut. A second sensor detects a mark to identify a print position on the film where predetermined information is to be printed. The first sensor is positioned downstream from the printing mechanism. A second sensor is positioned upstream from the printing mechanism.

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 each operate at optimum timing, so that the amount of 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 first sensor is arranged downstream of the vertical sealing mechanism and upstream of the cutting mechanism.

According to this configuration, since the length of the conveying path from the first sensor to the cutting mechanism is short, there is little possibility that the position of the film ascertained by the control circuit will be affected by the measurement error. Therefore, the cutting mechanism can operate with more precise timing.

A bag-manufacturing and packaging machine according to a third aspect of the present invention is the bag-manufacturing and packaging machine according to the first aspect or the second aspect, wherein the first sensor is arranged upstream of the former.

According to this configuration, the first sensor, which is used to operate the cutting mechanism at appropriate timing, can be arranged at a place where it is easy to attach.

A bag-manufacturing and packaging machine according to a fourth aspect of the present invention is the bag-manufacturing and packaging machine according to any one of the first to third aspects, wherein the length of the conveying path from the roll holding unit to the printing mechanism is is at least three times the size of the

According to this configuration, it is possible to reduce the amount of film that must be discarded, even though the transport path from the roll holder to the printing mechanism is long.

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

With this configuration, it is possible to reduce the amount of film that must be discarded despite the long transport path from the printing mechanism to the cutting mechanism.

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, further comprising a print inspection mechanism and a third sensor. The print inspection mechanism inspects whether predetermined information is properly printed. A third sensor detects the mark to identify the timing for operating the print inspection mechanism. A third sensor is positioned upstream of the print inspection mechanism.

According to this configuration, the bag making and packaging machine has the print inspection mechanism and the third sensor corresponding thereto. Therefore, it is possible to accurately confirm the information printed on the film by the printing mechanism.

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 to sixth aspects, further comprising a transport length variable mechanism. The transport length variable mechanism changes the length of the film transported by the transport mechanism from the printing mechanism to the cutting mechanism. The transport mechanism can be stopped once each time the film is transported by the size of the bag. At that stop both the printing mechanism and the cutting mechanism operate.

According to this configuration, since the transport 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. Furthermore, since the position of the film is double-checked by two sensors, the confirmation accuracy of the conveying state is improved.

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 to seventh aspects, wherein the conveying mechanism conveys the film by the size of the bag twice. can be stopped. One of the printing mechanism and the cutting mechanism operates at the first stop. At the second stop, the other of the printing mechanism and cutting mechanism operates.

This configuration improves the processing speed of the bag making and packaging machine.

A form-fill-seal machine according to a ninth aspect of the present invention is the form-fill-seal machine according to any one of the first to eighth aspects, further comprising a controller. The transport mechanism performs an intermittent operation that repeats transport and stop of the film. The control unit determines the timing to stop the transport from the time when the second sensor detects the mark and the distance the film has been transported after the second sensor detects the mark, and the first sensor detects the mark. Using the time, it is configured to confirm whether the film is transported at appropriate timing.

According to this configuration, the film is transported at an appropriate timing.

According to the bag making and packaging machine of the present invention, it is possible to reduce the amount of film that must be discarded.

1 is a schematic diagram showing the configuration of a bag making and packaging machine 100 according to a first embodiment of the present invention; FIG. The top view of the film F. FIG. FIG. 3 is a perspective view of a film tube FT that is longitudinally sealed. FIG. 10 is a perspective view of a laterally sealed film tube FT; FIG. 2 is a block diagram showing a control circuit 200 mounted on the bag making and packaging machine 100 of FIG. 1; Schematic diagram showing the configuration of a bag making and packaging machine 100A according to a second embodiment of the present invention. Schematic diagram showing the configuration of a bag making and packaging machine 100B according to a third embodiment of the present invention.

<First Embodiment>
(1) Overall Configuration FIG. 1 shows the configuration of a bag making and packaging machine 100 according to the first embodiment of the present invention. The bag making and packaging machine 100 includes a conveying mechanism 10, a roll holding unit 20, a printing mechanism 30, a printing inspection mechanism 40, a conveying length variable mechanism 50, a former 60, a vertical sealing mechanism 70, a horizontal sealing mechanism 75, a cutting mechanism 80, a first A sensor 91 and a second sensor 92 are provided.

(2) Detailed configuration (2-1) Transport mechanism 10
The transport mechanism 10 transports the packaging film F taken out from the roll holding unit 20 .

FIG. 2 shows the film F in question. The film F is elongated in the longitudinal direction L and has a constant width extending in the lateral direction W perpendicular to the longitudinal direction L. As shown in FIG. A design for use as a product packaging bag is repeatedly printed on the film F for each dimension D. As shown in FIG. Furthermore, marks M are printed on the film F at intervals of a dimension D in the longitudinal direction L. As shown in FIG. When the film F is finally processed into a bag, the dimension D will be the distance between the top and bottom sides of the bag or the distance between the left and right sides of the bag, depending on the design of the bag.

Returning to FIG. 1, while the transport mechanism 10 transports the film F, the film F is processed into a bag shape. The transport mechanism 10 finally discharges the bagged packaged goods WP.

The conveying mechanism 10 has a plurality of rollers, which are not denoted by reference numerals, the pull-down belt 15, the discharge conveyor 19, and a variable conveying length mechanism 50, which will be described later.

(2-2) Roll holding unit 20
The roll holder 20 is provided upstream of the transport path formed by the transport mechanism 10 . The roll holding part 20 holds the film roll FR. The film roll FR has a core material and a longitudinally long film F wound around the core material.

The conveying mechanism 10 holds one end of the film F and pulls out the film F from the roll holding section 20 .

(2-3) Printing mechanism 30
The printing mechanism 30 prints predetermined information such as the manufacturing date at an appropriate position on the film F being conveyed. As a result, 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 roll holding unit 20 to the printing mechanism 30 is three times or more the dimension D of the bag. Thereby, it is easy to obtain a space for arranging the mechanisms from the roll holding unit 20 to the printing mechanism 30 .

(2-4) Print inspection mechanism 40
The print inspection mechanism 40 consists of a camera.

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

(2-5) Transport length variable mechanism 50
The transport length variable mechanism 50 is one of the components of the transport mechanism 10, and changes the position of parts in order to adjust the length of the transport path of the film F between the printing mechanism 30 and the cutting mechanism 80. .

The transport length variable mechanism 50 has a movable roller 51 and a fixed roller 52 . The film F is transported from upstream to the movable roller 51, then to the fixed roller 52, and from there to the former 60 in the subsequent stage.

The rotating 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 in place. The movement of the movable roller 51 changes the length of the transport path of the film F. FIG.

(2-6) Former 60
The former 60 is for rolling up the film F conveyed in a flat state and overlapping the two longitudinal sides of the film F. As shown in FIG. The former 60 has a tubular member. The inner space of this tubular member is used as a filling path for filling the bag formed of the film F with articles to be packaged.

(2-7) Vertical sealing mechanism 70
The vertical sealing mechanism 70 fixes two vertical sides of the film F overlapped by the former 60 . The vertical sealing mechanism 70 has a heater. The heat generated by the heater temporarily softens the overlapped portion of the film F, thereby fixing the film.

FIG. 3 shows a film tube FT having the shape of a tube made by bonding. A vertical seal portion SL is formed in the film tube FT by fixing.

(2-8) Horizontal sealing mechanism 75
Returning to FIG. 1, the horizontal sealing mechanism 75 is for fixing two opposing portions of the film tube FT.

The horizontal sealing mechanism 75 has a first member 751 and a second member 752 facing each other across the transport path. The first member 751 and the second member 752 can be brought closer to each other or moved away from each other by a motor (not shown). Both the first member 751 and the second member 752 have heaters.

Fixing of the film tube FT is performed as follows. First, the first member 751 and the second member 752 approach each other and press the film tube FT. The parts to be pressed are two parts facing each other across the inner space of the film tube FT. This pressing is performed over the entire widthwise dimension of the film tube FT. Next, the heaters of the first member 751 and the second member 752 apply heat to the pressed portion of the film tube FT. As a result, the pressed portion is softened and fixed. Finally, the first member 751 and the second member 752 stop pressing and move away from each other.

FIG. 4 shows the film tube FT that has undergone the fixing process by the horizontal sealing mechanism 75. As shown in FIG. This film tube FT has a lateral seal portion SW formed by the fixing process of the lateral seal mechanism 75 .

Returning to FIG. 1, each time the operation of the horizontal sealing mechanism 75 is completed, the film tube FT is filled with one bag of articles through the inner space of the former 60 .

(2-9) Cutting mechanism 80
The cutting mechanism 80 is provided in the horizontal sealing mechanism 75 . The cutting mechanism 80 has a blade 801 and a receiving portion 802 . The blade 801 is provided on the first member 751 and can be extended and retracted. A receiving portion 802 is provided on the second member 752 and can receive the extended blade 801 .

FIG. 4 shows a cutting position CP where the cutting mechanism 80 cuts. The cutting position CP is located at the lateral seal portion SW.

Returning to FIG. 1 , in the cutting operation of cutting mechanism 80 , blade 801 extends toward receiver 802 . This separates the individual packaged goods WP.

The length of the conveying path from the printing mechanism 30 to the cutting mechanism 80 is three times or more the dimension D of the bag. Thereby, it is easy to obtain a space for arranging the mechanisms from the printing mechanism 30 to the cutting mechanism 80 .

(2-10) First sensor 91
The first sensor 91 is for detecting the mark M (FIG. 2) printed on the film F in order to specify the cutting position CP (FIG. 4) to be cut in the film tube FT.

The first sensor 91 is arranged upstream of the cutting mechanism 80 in the conveying path, specifically, between the print inspection mechanism 40 and the conveying length variable mechanism 50 .

(2-11) Second sensor 92
The second sensor 92 is for detecting the mark M (FIG. 2) printed on the film F in order to identify the print position on the film F where the predetermined information should be printed.

The second sensor 92 is arranged upstream of the printing mechanism 30 in the transport path.

(3) Control Circuit (3-1) Overall Configuration FIG. The control circuit 200 has a CPU 210 and a memory 220 . CPU 210 has a group of input ports and a group of output ports.

(3-2) Input The input port of the CPU 210 is connected to the first detection unit 231, the second detection unit 232, the image processing unit 233, and the operation panel control unit 271. FIG.

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 modifies or processes the data output by the print inspection mechanism 40 .

The operation panel control unit 271 processes information input by the user through the operation panel 270 mounted on the bag making and packaging machine 100 for various settings, and causes the CPU 210 to read the information.

(3-3) Output The output ports of the CPU 210 include a roller motor drive circuit 251, a roller rotating shaft movement motor drive circuit 252, a printing 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 current for driving motors that rotate various rollers included in the transport mechanism 10 .

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

The print mechanism drive circuit 253 generates signals or currents that control the print mechanism 30 .

A heater drive circuit 254 generates current for controlling the heater of the vertical sealing mechanism 70 .

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

Solenoid drive circuit 256 generates a current that controls the solenoid that controls the extension and retraction of blade 801 of cutting mechanism 80 .

(3-4) Central Processing The CPU 210 detects marks on the film F via the first sensor 91 and the second sensor 92 . In addition, the CPU 210 controls motors that rotate various rollers included in the transport mechanism 10 .

Accordingly, the CPU 210 can grasp where the marks on the film F are located at arbitrary timings.

(4) Operation Returning to FIG. 1, the “continuous operation” executed by the bag making and packaging machine 100 will be described.

The transport mechanism 10 always transports the film F at a constant transport speed.

Since the control circuit 200 (FIG. 5) grasps the time when the second sensor 92 detects the mark M and the distance over which the film F has been conveyed since then, the printing mechanism 30 can be operated based on these values. Calculate the timing. After that, the control circuit 200 controls the printing mechanism 30 at the calculated timing to print predetermined information on the film F at an appropriate position.

Film F continues to be transported. Since the control circuit 200 grasps the time when the second sensor 92 detects the mark M and the distance the film F has been conveyed after that time, the timing at which the print inspection mechanism 40 should operate can be determined from these values. calculate. After that, the control circuit 200 controls the print inspection mechanism 40 at the calculated timing, acquires an image of the film F to be inspected, and inspects it.

Next, the film F passes through the transport length variable mechanism 50 and is rolled up by the former 60 so that the two longitudinal sides of the film F are overlapped. A vertical sealing mechanism 70 heats the overlap. This secures the overlap and creates a film tube FT with longitudinal seals SL (FIG. 3).

The film tube FT is filled with one bag of articles in the previous cycle. The lateral sealing mechanism 75 creates a lateral sealing portion SW (FIG. 4) at a portion of the film tube FT higher than the portion where the articles are stored. The cutting mechanism 80 cuts the cutting position CP (FIG. 4) in the lateral seal portion SW. The timing at which the horizontal sealing mechanism 75 and the cutting mechanism 80 operate is determined by the control circuit 200 (FIG. 5) from the time when the first sensor 91 detects the mark M and the distance the film F has been transported since then. be done.

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

(5) Features (5-1)
The bag making and packaging machine 100 has two sensors for detecting the marks M. As shown in FIG. That is, a first sensor 91 corresponding to the cutting mechanism 80 and a second sensor 92 corresponding to the printing mechanism 30 . Therefore, even if the joint formed with the replenishment of the film roll FR reaches the transport mechanism 10 and the interval between the adjacent marks M becomes an inappropriate value other than the dimension D, the printing mechanism 30 and the cutting Each of the mechanisms 80 can operate at optimum timing. Therefore, the amount of film F that must be discarded can be reduced.

(5-2)
The second sensor 92 is arranged upstream of the printing mechanism 30 . Since the printing mechanism 30 can use the detection signal of the second sensor 92 arranged upstream of the printing mechanism 30 itself, it can operate at appropriate timing.

(5-3)
A first sensor 91 used to operate the cutting mechanism 80 at appropriate timing is arranged downstream of the printing mechanism 30 and upstream of the former 60 . In this region, the conveying path extends linearly. Additionally, in this area, the film F being transported is in sheet form and has not yet been rolled up. Therefore, it is easy to attach the first sensor 91 to this area.

(5-4)
The length of the transport path from the roll holding unit 20 to the printing mechanism 30 is three times or more the dimension D of the bag. According to this configuration, the amount of film F that must be discarded can be reduced even though the transport path from the roll holding unit 20 to the printing mechanism 30 is long.

(5-5)
The length of the conveying path from the printing mechanism 30 to the cutting mechanism 80 is three times or more the dimension D of the bag. With this configuration, the amount of film F to be discarded can be reduced even though the transport path from the printing mechanism 30 to the cutting mechanism 80 is long.

(6) Modifications Modifications of the first embodiment are shown below.

(6-1) First modification 1A
(6-1-1) Operation The bag making and packaging machine 100 according to the first modification 1A of the first embodiment has a mechanical configuration similar to that of the bag making and packaging machine 100 according to the first embodiment shown in FIG. are the same. However, as for the operation method, the bag making and packaging machine 100 according to the first modified example 1A performs the "intermittent operation" instead of the above-described "continuous operation". That is, the film F is repeatedly transported and stopped.

The conveying mechanism 10 temporarily stops once each time the film F is conveyed by the bag dimension D (FIG. 2). During the stop period, both the printing mechanism 30 and the cutting mechanism 80 operate.

In order to allow both the printing mechanism 30 and the cutting mechanism 80 to operate simultaneously, prior to the packaging operation, the variable conveyance length mechanism 50 adjusts the length of the conveyance path from the printing mechanism 30 to the cutting mechanism 80 to an optimum value. be changed to As a result, it is possible to suppress the occurrence of misalignment between the printing and cutting positions.

The timing for stopping the transport is determined by the control circuit 200 based on the time when the second sensor 92 detects the mark M and the distance the film F has been transported since then. In addition, the control circuit 200 can use the time when the first sensor 91 detects the mark M to confirm whether or not the film F is properly transported at the expected timing.

When the joint portion of the film enters the conveying path, the second sensor 92 calculates the difference between the distance between the marks M adjacent to each other across the joint portion and the dimension D of the bag. The control circuit 200 adjusts the conveying distance from the printing mechanism 30 to the cutting mechanism 80 by controlling the conveying length variable mechanism 50 according to the value of the difference. As a result, even if there is a portion of the film F in which the intervals between the marks M are inconsistent, printing and cutting can be performed appropriately.

(6-1-2) Features According to this configuration, the transport of the film F is stopped only at the timing when the printing mechanism 30 and the cutting mechanism 80 operate simultaneously, so the processing speed of the bag making and packaging machine 100 is improved. . Furthermore, since the position of the film F is double-checked by two sensors, the confirmation accuracy of the conveying state is improved.

(6-2) First modification 1B
(6-2-1) Operation The bag making and packaging machine 100 according to the first modification 1B performs an intermittent operation different from that of the first modification 1A described above.

The transport mechanism 10 can intermittently operate with two temporary transport stops in addition to the intermittent motion with one temporary transport stop described in the first modified example 1A. That is, the transport mechanism 10 can be stopped twice each time the film F is transported by the bag dimension D (FIG. 2). The printing mechanism 30 prints predetermined information on the film F during the first transport stop period. During the second transport stop period, the cutting mechanism 80 cuts the laterally sealed portion SW of the film tube FT.

The timing of the first transportation stop is determined by the control circuit 200 from the time when the second sensor 92 detects the mark M and the distance the film F has been transported since then. The timing of the second transportation stop is determined by the control circuit 200 based on the time when the first sensor 91 detects the mark M and the distance the film F has been transported since then.

Prior to the start of the packaging operation of the bag making and packaging machine 100, the transport length variable mechanism 50 appropriately adjusts the length of the transport path of the film F between the printing mechanism 30 and the cutting mechanism 80. FIG. As a result, the bag-making and packaging machine 100 normally performs an intermittent operation with one temporary transportation stop, while performing an intermittent operation with two temporary transportation stops near the joint portion of the film F. can.

(6-2-2) Features According to this configuration, as long as the bag making and packaging machine 100 continues to manufacture the same type of packaged goods using the same type of film F, the variable transport length mechanism 50 does not need to operate. Gone. As a result, the processing speed of the bag making and packaging machine 100 is further improved.

<Second embodiment>
(1) Configuration FIG. 6 shows the configuration of a bag making and packaging machine 100A according to the second embodiment of the present invention. The bag-making and packaging machine 100A differs from the bag-making and packaging machine 100 according to the first embodiment in the arrangement position of the first sensor 91 . The first sensor 91 is arranged downstream of the vertical sealing mechanism 70 and upstream of the cutting mechanism 80 .

(2) Features The cutting mechanism 80 can use the detection signal of the first sensor 91 arranged upstream of the cutting mechanism 80 itself and in the vicinity of the cutting mechanism 80 itself in order to determine the timing of performing the cutting operation. . Therefore, since the conveying 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 is less likely to be affected by measurement errors. As a result, the cutting mechanism 80 can operate with more precise timing.

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

<Third Embodiment>
(1) Configuration FIG. 7 shows the configuration of a bag making and packaging machine 100B according to the third embodiment of the present invention. In the bag making and packaging machine 100B, the arrangement positions of the first sensor 91 and the second sensor 92 are the same as in the bag making and packaging machine 100 according to the first embodiment. However, the bag-making and packaging machine 100B differs from the bag-making and packaging machine 100 according to the first embodiment in that a third sensor 93 is further provided.

The third sensor 93 is for detecting the mark M in order to specify the timing of operating the print inspection mechanism 40 . The third sensor 93 is arranged upstream of the print inspection mechanism 40 in the transport path, specifically, between the print inspection mechanism 40 and the print mechanism 30 .

(2) Features The bag making and packaging machine 100B has a print inspection mechanism 40 and a 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 The intermittent operation according to the first modification 1A or the second modification 1B of the first embodiment may be applied to the bag making and packaging machine 100B according to the third embodiment.

F Film FR Film roll WP Packaged goods 10 Conveying mechanism 20 Roll holder 30 Printing mechanism 40 Print inspection mechanism 50 Variable conveying mechanism 51 Movable roller 52 Fixed roller 60 Former 70 Vertical sealing mechanism 75 Horizontal sealing mechanism 80 Cutting mechanism 91 First sensor (cutting sensor)
92 second sensor (printing sensor)
93 third sensor (printing inspection sensor)
100, 100A, 100B bag making and packaging machine

Japanese Patent No. 3971833

Claims (6)

A bag making and packaging machine for packaging an article in a bag made of a film on which marks are printed at regular intervals in the longitudinal direction, wherein the interval is from a first side of the bag to a second side opposite to the first side. is the dimension up to two sides,
a transport mechanism for transporting the film from upstream to downstream;
a roll holding unit that holds a film roll around which the film is wound;
a printing mechanism arranged downstream of the roll holding unit for printing predetermined information on the film;
a former disposed downstream of the printing mechanism and overlapping two longitudinal sides of the film;
a vertical sealing mechanism disposed downstream of the former for fixing the two overlapping vertical sides to form a film tube;
a horizontal sealing mechanism disposed downstream of the vertical sealing mechanism and forming a horizontal sealing portion extending in a horizontal direction perpendicular to the vertical direction on the film tube by fixing two opposing portions of the film tube;
a cutting mechanism disposed downstream of the vertical sealing mechanism for cutting the film tube at the horizontal sealing portion;
a first sensor for detecting the mark to specify a cutting position to cut the film tube;
a second sensor for detecting the mark in order to specify a printing position where the predetermined information on the film should be printed;
with
The first sensor is arranged downstream from the printing mechanism and upstream from the cutting mechanism ,
The second sensor is arranged upstream of the printing mechanism ,
after the splice where the starting edge of the film joined with the trailing edge of the film has passed the first sensor and the second sensor;
A timing for printing is calculated based on the time when the mark is detected by the second sensor, the film is printed by the printing mechanism, and then the film cylinder is based on the time when the mark is detected by the first sensor. A control unit that calculates the cutting timing to cut the and performs the cutting operation with the cutting mechanism,
Bag making and packaging machine. The first sensor is arranged downstream of the vertical sealing mechanism and upstream of the cutting mechanism,
The bag making and packaging machine according to claim 1. The first sensor is arranged upstream of the former,
The bag making and packaging machine according to claim 1 . The length of the conveying path from the roll holding unit to the printing mechanism is at least three times the size of the bag,
The bag making and packaging machine according to any one of claims 1 to 3. The length of the conveying path from the printing mechanism to the cutting mechanism is at least three times the size of the bag,
The bag making and packaging machine according to any one of claims 1 to 4. a print inspection mechanism for inspecting whether or not the predetermined information is properly printed;
a third sensor that detects the mark to identify the timing for operating the print inspection mechanism;
further comprising
The third sensor is arranged upstream of the print inspection mechanism,
The bag making and packaging machine according to any one of claims 1 to 5.

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