JP2019218141A - Bag-making and packaging machine - Google Patents

Abstract

To reduce a film amount to be discarded according to a bag-making and packaging machine.SOLUTION: A bag-making and packaging machine 100 comprises a conveyance mechanism 10, a roll holding part 20, a printing mechanism 30, a former 60, a vertical seal mechanism 70, a lateral seal mechanism 75, a cutting mechanism 80, a first sensor 91, and a second sensor 92. The printing mechanism 30 prints information onto a film F. The former 60 superposes two vertical sides of the film F. The vertical seal mechanism 70 prepares a film cylinder FT by fixing the two vertical sides. The lateral seal mechanism 75 prepares a lateral seal portion by being fixed across the film cylinder FT. The cutting mechanism 80 cuts the film cylinder FT at the lateral seal portion. The first sensor 91 detects a mark of the film F to specify a cutting position for cutting the film cylinder FT. The second sensor 92 detects a mark to specify a print position for printing predetermined information of the film F. The first sensor 91 is arranged at a lower stream than that of the printing mechanism 30. The second sensor 92 is arranged at an upper stream than that of the printing mechanism 30.SELECTED DRAWING: Figure 1

Description

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

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

  The bag making and packaging machine disclosed in Patent Document 1 (Japanese Patent No. 3971833) includes one sensor for detecting a mark.

  In a factory that manufactures packaged articles, the operation of the bag making and packaging machine is temporarily stopped immediately before one roll of film roll is used up. Next, a new film roll is set on the bag making and packaging machine by an operator, and the end of the previous film and the leading end of the film of the new roll are joined by an adhesive tape or the like. Thereafter, the operation of the bag making and packaging machine is restarted.

  Normally, the positional relationship between the two films is not aligned at the joint of the films, so that the interval between marks adjacent to each other across the joint becomes inappropriate. For this reason, in the vicinity of the joining portion of the film, misalignment of printing or cutting may occur. The range in which such misalignment occurs in the film may extend over the transport path between the two furthest ones of the cutting mechanism, the printing mechanism, and the sensor for detecting the mark. The film portion having such misalignment must be discarded.

  It is an object of the present invention to reduce the amount of film that has to be discarded in a bag making and packaging machine.

  A bag making and packaging machine according to a first aspect of the present invention packages an article in a bag made of a film on which marks are printed at regular intervals in a vertical direction. The interval is a dimension from the first side to the second side of the bag. The second side is a side opposite to the first side. The bag making and packaging machine includes a transport mechanism, a roll holding unit, 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 unit holds a film roll around which the film is wound. The printing mechanism is arranged downstream of the roll holding unit, and prints predetermined information on the film. The former is located downstream of the printing mechanism and overlaps the two vertical sides of the film. The vertical sealing mechanism is disposed downstream of the former, and fixes the two overlapped vertical sides to form a film cylinder. The horizontal seal mechanism is disposed downstream of the vertical seal mechanism, and forms a horizontal seal portion extending in the horizontal direction in the film cylinder by fixing two opposing portions of the film cylinder. The horizontal direction is perpendicular to the vertical direction. The cutting mechanism is arranged downstream of the vertical sealing mechanism, and cuts the film cylinder at the horizontal sealing portion. The first sensor detects a mark for specifying a cutting position of the film cylinder to be cut. The second sensor detects a mark for specifying a printing position where predetermined information of the film is to be printed. The first sensor is arranged downstream of the printing mechanism. The second sensor is arranged upstream of 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 operate at the optimum timing, respectively, so that the amount of the film that must be discarded can be reduced.

  In a bag making and packaging machine according to a second aspect of the present invention, in the bag making and packaging machine according to the first aspect, the first sensor is disposed downstream of the vertical sealing mechanism and upstream of the cutting mechanism.

  According to this configuration, since the length of the transport path from the first sensor to the cutting mechanism is short, there is little possibility that the measurement error affects the position of the film recognized by the control circuit. Therefore, the cutting mechanism can operate at more accurate timing.

  In a bag making and packaging machine according to a third aspect of the present invention, in the bag making and packaging machine according to the first aspect or the second aspect, the first sensor is disposed upstream of the former.

  According to this configuration, the first sensor used to operate the cutting mechanism at an appropriate timing can be arranged at a place where it can be easily attached.

  A bag making and packaging machine according to a fourth aspect of the present invention is the bag making and packaging machine according to any one of the first to third aspects, wherein the length of the transport path from the roll holding unit to the printing mechanism is equal to the length of the bag. Is three times or more the size of

  According to this configuration, the amount of film that must be discarded can be reduced despite the length of the transport path from the roll holding unit to the printing mechanism.

  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 the length of the transport path from the printing mechanism to the cutting mechanism is equal to the length of the bag. It is at least three times the size.

  According to this configuration, the amount of film that must be discarded can be reduced despite the length of the 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 checks whether or not predetermined information is appropriately printed. The third sensor detects a mark in order to specify a timing for operating the print inspection mechanism. The third sensor is arranged 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, the information printed on the film by the printing mechanism can be accurately confirmed.

  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 variable transport length mechanism. The variable transport length 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 the stop, both the printing mechanism and the cutting mechanism operate.

  According to this configuration, the conveyance of the film is stopped only at the timing when the printing mechanism and the cutting mechanism are simultaneously operated, so that the processing speed of the bag making and packaging machine is improved. Further, since the position of the film is double-checked by the two sensors, the accuracy of checking the transport 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 transport mechanism transports the film twice the size of the bag. Can be stopped. At the first stop, one of the printing mechanism and the cutting mechanism operates. At 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.

  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 to eighth aspects, further comprising a control unit. The transport mechanism performs an intermittent operation of repeating transport and stop of the film. The control unit determines the timing of stopping the transport from the time at which the second sensor detects the mark and the distance at which the film has been transported since the detection of the mark by the second sensor, and the first sensor has detected the mark. The time is used to check whether or not the film is being conveyed at an appropriate timing.

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

  ADVANTAGE OF THE INVENTION According to the bag making and packaging machine concerning this invention, the quantity of the film which must be discarded can be reduced.

The schematic diagram showing the composition of bag making and packaging machine 100 concerning a 1st embodiment of the present invention. The top view of the film F. FIG. 4 is a perspective view of a vertically sealed film tube FT. FIG. 3 is a perspective view of a film cylinder FT that is horizontally sealed. FIG. 2 is a block diagram showing a control circuit 200 mounted on the bag making and packaging machine 100 of FIG. 1. The schematic diagram which shows the structure of 100 A of bag making and packaging machines which concern on 2nd Embodiment of this invention. The schematic diagram which shows the structure of the bag making and packaging machine 100B which concerns on 3rd Embodiment of this invention.

<First embodiment>
(1) Overall Configuration 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 transport mechanism 10, a roll holding unit 20, a printing mechanism 30, a print inspection mechanism 40, a variable transport length mechanism 50, a former 60, a vertical seal mechanism 70, a horizontal seal 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 film F for packaging taken out of the roll holding unit 20.

  FIG. 2 shows the film F. The film F has a constant width that extends in the vertical direction L and spreads in the horizontal direction W perpendicular to the vertical direction L. On the film F, a pattern for use as a bag for packaging products is repeatedly printed for each dimension D. Further, marks M are printed on the film F at intervals of a dimension D in the vertical direction L. When the film F is finally processed into a bag, the dimension D is the distance between the upper side and the lower side or the distance between the left side and the right side 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 packaged articles WP packed in a bag.

  The transport mechanism 10 includes a plurality of rollers without reference numerals, a pull-down belt 15, a discharge conveyor 19, and a transport length variable mechanism 50 described later.

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

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

(2-3) Printing mechanism 30
The printing mechanism 30 prints predetermined information such as the date of manufacture at an appropriate position on the film F being transported. 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 roll holding section 20 to the printing mechanism 30 is at least three times the dimension D of the bag. Thereby, a space for disposing the mechanism from the roll holding unit 20 to the printing mechanism 30 is easily obtained.

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

  The print inspection mechanism 40 inspects whether the predetermined information printed by the print mechanism 30 is printed on the film F in a correct mode. 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) Transfer length variable mechanism 50
The variable transport length mechanism 50 is one of the components of the transport mechanism 10, and changes the position of a component 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 variable transport length mechanism 50 has a movable roller 51 and a fixed roller 52. The film F is conveyed from the upstream to the movable roller 51, then to the fixed roller 52, and from there to the former 60.

  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 at a fixed position. The movement of the movable roller 51 changes the length of the transport path of the film F.

(2-6) Former 60
The former 60 is for rounding the film F conveyed in a flat state and overlapping two vertical sides of the film F. The former 60 has a cylindrical member. The internal space of the tubular member is used as a filling path for filling an article to be packed into a bag formed of the film F.

(2-7) Vertical seal 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 causes the overlapping portion of the film F to soften temporarily, whereby the fixing is performed.

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

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

  The horizontal seal mechanism 75 has a first member 751 and a second member 752 which are opposed to each other via a transport path. The first member 751 and the second member 752 can be approached or separated from each other by a motor (not shown). Each of the first member 751 and the second member 752 has a heater.

  The fixing of the film cylinder FT is performed as follows. First, the first member 751 and the second member 752 approach each other and press the film cylinder FT. The two parts that are pressed are opposed to each other across the internal space of the film cylinder FT. This pressing is performed over the entire widthwise dimension of the film cylinder FT. Next, the heaters of the first member 751 and the second member 752 apply heat to the pressed portion of the film cylinder FT. As a result, the pressed portion is softened and fixed. Finally, the first member 751 and the second member 752 stop pressing and separate from each other.

  FIG. 4 shows the film cylinder FT subjected to the fixing process by the horizontal sealing mechanism 75. The film cylinder FT has a horizontal seal portion SW formed by a fixing process of the horizontal seal mechanism 75.

  Returning to FIG. 1, each time the operation of the horizontal sealing mechanism 75 ends, the film cylinder FT is filled with one bag of articles via the internal space of the former 60.

(2-9) Cutting mechanism 80
The cutting mechanism 80 is provided in the horizontal seal 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 extend and retract. The 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 at the horizontal seal part SW.

  Returning to FIG. 1, in the cutting operation of the cutting mechanism 80, the blade 801 extends toward the receiving portion 802. Thereby, the individual packaged articles WP are separated.

  The length of the transport path from the printing mechanism 30 to the cutting mechanism 80 is at least three times the dimension D of the bag. Thereby, a space for disposing the mechanisms from the printing mechanism 30 to the cutting mechanism 80 is easily obtained.

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

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

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

  The second sensor 92 is disposed upstream of the printing mechanism 30 on the transport path.

(3) Control Circuit (3-1) Overall Configuration FIG. 5 shows a control circuit 200 that controls the bag making and packaging machine 100. 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 first detection unit 231, the second detection unit 232, the image processing unit 233, and the operation panel control unit 271 are connected to the input ports of the CPU 210.

  The first detection unit 231 converts a 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 by the print inspection mechanism 40.

  The operation panel control unit 271 processes information input by the user via the operation panel 270 mounted on the bag making and packaging machine 100 to make 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 rotation axis moving 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 a current for driving a motor that rotates various rollers included in the transport mechanism 10.

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

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

  The heater drive circuit 254 generates a current for controlling the heater of the vertical seal mechanism 70.

  The motor and heater drive circuit 255 generates a signal or current for controlling the motor and heater of the horizontal seal mechanism 75.

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

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

  Therefore, at an arbitrary timing, the CPU 210 can grasp at which position the mark of the film F exists.

(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) knows the time at which the second sensor 92 detects the mark M and the distance over which the film F has been transported thereafter, the printing mechanism 30 operates from these values. Calculate the timing to be. Thereafter, the control circuit 200 controls the printing mechanism 30 at the calculated timing to print predetermined information at an appropriate position on the film F.

  The film F continues to be further conveyed. Since the control circuit 200 knows the time at which the second sensor 92 detects the mark M and the distance over which the film F has been transported thereafter, the control circuit 200 determines the timing at which the print inspection mechanism 40 should operate based on these values. calculate. Thereafter, 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 performs the inspection.

  Next, the film F passes through the variable transport length mechanism 50, and is then rounded by the former 60, and the two vertical sides of the film F are overlapped. The vertical sealing mechanism 70 heats the overlap. Thereby, the overlap is fixed, and the film cylinder FT having the vertical seal portion SL (FIG. 3) is produced.

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

  The individual packaged articles WP cut in this way 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 includes two sensors for detecting the mark M. 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 when the joining portion 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 is disconnected. Each of the mechanisms 80 can operate at an optimal timing. Therefore, the amount of the 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 disposed upstream of the printing mechanism 30 itself, the printing mechanism 30 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 former 60. In this region, the transport path extends linearly. In addition, in this area, the film F being conveyed is in a sheet shape and has not been rolled yet. Therefore, the first sensor 91 can be easily attached to this area.

(5-4)
The length of the transport path from the roll holding unit 20 to the printing mechanism 30 is at least three times the dimension D of the bag. According to this configuration, it is possible to reduce the amount of the film F that must be discarded despite the long transport path from the roll holding unit 20 to the printing mechanism 30.

(5-5)
The length of the transport path from the printing mechanism 30 to the cutting mechanism 80 is at least three times the dimension D of the bag. According to this configuration, the amount of the film F that needs to be discarded can be reduced despite the long transport path from the printing mechanism 30 to the cutting mechanism 80.

(6) Modified Example A modified example of the first embodiment will be described below.

(6-1) First Modification Example 1A
(6-1-1) Operation The bag making and packaging machine 100 according to the first modification 1A of the first embodiment has the same mechanical configuration as the bag making and packaging machine 100 according to the first embodiment shown in FIG. Is the same. However, in the operation method, the bag making and packaging machine 100 according to the first modified example 1A executes “intermittent operation” instead of “continuous operation” described above. That is, the transport and stop of the film F are repeated.

  The transport mechanism 10 temporarily stops once every time the film F is transported by the size D of the bag (FIG. 2). During the suspension period, both the printing mechanism 30 and the cutting mechanism 80 operate.

  Prior to the packaging operation, the variable transport length mechanism 50 adjusts the length of the transport path from the printing mechanism 30 to the cutting mechanism 80 to an optimal value so that both the printing mechanism 30 and the cutting mechanism 80 can be operated simultaneously. Change to As a result, it is possible to suppress the occurrence of mismatch between the printing and cutting positions.

  The timing of stopping the conveyance is determined by the control circuit 200 from the time at which the second sensor 92 detects the mark M and the distance by which the film F has been conveyed thereafter. In addition, the control circuit 200 can use the time when the first sensor 91 detects the mark M to check whether or not the film F is being properly conveyed at the expected timing.

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

(6-1-2) Features 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 are simultaneously operated, so that the processing speed of the bag making and packaging machine 100 is improved. . Further, since the position of the film F is double-checked by the two sensors, the accuracy of checking the transport state is improved.

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

  The transport mechanism 10 can perform an intermittent operation with two temporary stoppages in addition to the intermittent operation with one temporary stoppage described in the first modification 1A. That is, the transport mechanism 10 can stop twice each time the film F is transported by the dimension D of the bag (FIG. 2). In the first transport suspension period, the printing mechanism 30 prints predetermined information on the film F. In the second transport stop period, the cutting mechanism 80 cuts the horizontal seal SW of the film cylinder FT.

  The timing of the first transport stop is determined by the control circuit 200 from the time at which the second sensor 92 detects the mark M and the distance over which the film F has been transported thereafter. The timing of the second transport stop is determined by the control circuit 200 from the time when the first sensor 91 detects the mark M and the distance over which the film F has been transported thereafter.

  Prior to the start of the packaging operation of the bag making and packaging machine 100, the length of the transport path of the film F between the printing mechanism 30 and the cutting mechanism 80 is appropriately adjusted by the variable transport length mechanism 50. As a result, the bag making and packaging machine 100 normally performs an intermittent operation with one temporary stoppage, while performing an intermittent operation with two temporary stoppages near the joining portion of the film F. it 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 article using the same type of film F, the transport length variable mechanism 50 needs to operate. Disappears. As a result, the processing speed of the bag making and packaging machine 100 is further improved.

<Second embodiment>
(1) Configuration FIG. 6 shows a configuration of a bag making and packaging machine 100A according to a second embodiment of the present invention. In the bag making and packaging machine 100A, the arrangement position of the first sensor 91 is different from that of the bag making and packaging machine 100 according to the first embodiment. The first sensor 91 is arranged downstream of the vertical seal 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 disposed upstream of the cutting mechanism 80 and near the cutting mechanism 80 itself to determine the timing of performing the cutting operation. . Therefore, since the length of the transport path from the first sensor 91 to the cutting mechanism 80 is short, there is little possibility that the measurement error affects the position of the film F recognized by the control circuit 200. As a result, the cutting mechanism 80 can operate at more accurate 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 a configuration 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 arrangement positions of the first sensor 91 and the second sensor 92 are the same as those of the bag making and packaging machine 100 according to the first embodiment. However, the bag making and packaging machine 100B is different from the bag making and packaging machine 100 according to the first embodiment in further including a third sensor 93.

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

(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 article 10 transport mechanism 20 roll holding unit 30 printing mechanism 40 print inspection mechanism 50 variable transport length mechanism 51 movable roller 52 fixed roller 60 former 70 vertical seal mechanism 75 horizontal seal mechanism 80 cutting mechanism 91 first sensor (Cutting sensor)
92 Second sensor (printing sensor)
93 Third sensor (print inspection sensor)
100, 100A, 100B Bag making and packaging machine

Japanese Patent No. 3971833

Claims (9)

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 a vertical direction, wherein the interval is a distance from a first side of the bag to a side opposite to the first side. Dimensions 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 and printing predetermined information on the film,
A former arranged downstream of the printing mechanism and overlapping two vertical sides of the film;
A vertical sealing mechanism that is arranged downstream of the former and fixes the two stacked vertical sides to form a film cylinder;
A horizontal sealing mechanism that is disposed downstream of the vertical sealing mechanism and forms a horizontal sealing portion extending in the horizontal direction perpendicular to the vertical direction on the film cylinder by fixing two opposing portions of the film cylinder;
A cutting mechanism that is disposed downstream of the vertical sealing mechanism and cuts the film cylinder at the horizontal sealing portion,
A first sensor for detecting the mark to specify a cutting position of the film cylinder to be cut;
A second sensor that detects the mark to specify a printing position where the predetermined information on the film is to be printed;
With
The first sensor is disposed downstream of the printing mechanism,
The second sensor is disposed upstream of the printing mechanism.
Bag making and packaging machine. The first sensor is disposed 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 disposed upstream of the former;
The bag making and packaging machine according to claim 1. The length of the transport path from the roll holding section to the printing mechanism is at least three times the dimension of the bag.
The bag making and packaging machine according to any one of claims 1 to 3. The length of the transport path from the printing mechanism to the cutting mechanism is at least three times the dimension 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 appropriately printed,
A third sensor for detecting the mark to specify a timing for operating the print inspection mechanism;
Further comprising
The third sensor is disposed upstream of the print inspection mechanism.
The bag making and packaging machine according to any one of claims 1 to 5. A transport length variable mechanism that changes the length of the film transported by the transport mechanism from the printing mechanism to the cutting mechanism,
Further comprising
The transport mechanism can stop once each time the film is transported by the size of the bag,
In the stop, both the printing mechanism and the cutting mechanism operate.
A bag making and packaging machine according to any one of claims 1 to 6. The transport mechanism can be stopped twice each time the film is transported by the size of the bag,
At 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.
A bag making and packaging machine according to any one of claims 1 to 7. Control unit,
Further comprising
The transport mechanism performs an intermittent operation of repeating transport and stop of the film,
The control unit determines the timing of stopping the transport from the time at which the second sensor detects the mark and the distance at which the film has been transported since the detection of the mark by the second sensor, and 1 is configured to check whether the film is being conveyed at an appropriate timing using a time at which the sensor detects the mark,
A bag making and packaging machine according to any one of claims 1 to 8.

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