JP4743572B2 - Vertical bag making and filling machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vertical bag making filling and packaging machine for forming a belt-like packaging film into a bag shape and filling the contents therein.
[0002]
[Prior art]
FIG. 12 is a configuration diagram showing an outline of a vertical bag making filling and packaging machine. First, a vertical bag making filling and packaging machine will be described with reference to FIG. A belt-shaped packaging film (hereinafter simply referred to as “film”) 1 conveyed through a plurality of conveying rollers 14 is wound around the outer peripheral surface of a standing tubular bag-making tube 16 and conveyed downward. Go.
[0003]
A vertical seal heater (vertical sealer) 17 is provided on the side of the bag-making tube 16, and the film 1 wound around the bag-making tube 16 is heat-sealed by the vertical sealer 17 at the polymerization side end. It is formed into a cylindrical shape.
[0004]
A pair of lateral heater blocks (lateral sealers) 19 are provided below the bag-making tube 16 so as to face each other across a film transport path (hereinafter simply referred to as “transport path”) of the film 1. Then, the film 1 fed downward is sandwiched between these horizontal sealers 19 and heat-sealed in the width direction to form a bag shape.
[0005]
Thereafter, the film 1 is filled with an article to be packaged (contents) through the bag making tube 16 and the film 1 is conveyed downward. And the film 1 is heat-sealed in the width direction by the horizontal sealer 19, and the sealed packaging bag is completed. At the same time, a cutter (not shown) attached to the horizontal sealer 19 operates to cut the horizontal seal surface.
[0006]
Now, depending on the contents filled in the packaging bag, CO ₂ Some generate gas such as coffee beans. A package filled with this kind of contents may be equipped with a check valve for degassing at a predetermined location. The check valve is attached to the film by, for example, heat welding, and has a function of releasing gas in the packaging bag to the outside through the hole and blocking external moisture and air.
[0007]
2. Description of the Related Art Conventional vertical bag making and packing machines equipped with a device for mounting a check valve on a film are disclosed in Japanese Patent Application Laid-Open Nos. 7-267205 and 3-69409.
That is, in Japanese Patent Application Laid-Open No. 7-267205, a check valve is temporarily bonded to a film by a check valve supply temporary adhesion mechanism in the vicinity of a supply roll (upstream position of the conveyance path), and is directly moved to a downstream position of the conveyance path. A structure is disclosed in which a check valve is permanently bonded simultaneously with heat sealing of a film by the vertical sealer while being conveyed to the vertical sealer provided. In addition, the film conveyance to the vertical sealer is performed by a feeding belt provided on the downstream side.
[0008]
Japanese Patent Application Laid-Open No. 3-69409 discloses that a film is cut using a cutting device near the supply roll (upstream position in the transport path) and then transported to the downstream position near the bag making tube. A structure in which a gas vent valve (check valve) is attached in accordance with the cutting is disclosed. In addition, the film conveyance to the sticking position of the degassing valve is performed by a feeding roller provided on the downstream side.
[0009]
[Problems to be solved by the invention]
However, in the prior art disclosed in Japanese Patent Application Laid-Open No. 7-267205, the film is fed from the supply roll by the supply belt provided at the downstream position of the conveyance path far from the supply roll, and in the vicinity of the supply roll. Since the check valve is adhered to the film at the position, the adhesion interval of the check valve becomes unstable due to the elongation of the film flowing through the conveyance path, the slip of the film during the conveyance, and the like.
[0010]
And this means that the check valve adhered to the film at irregular intervals is also applied to the packaging bag in spite of the requirement to make the check valve bonding position in the finished packaging bag constant. The product could not be placed at a fixed position, reducing the commercial value.
[0011]
The above-described problem also applies to the conventional technique disclosed in Japanese Patent Laid-Open No. 3-69409, and as a result of the uneven spacing of the cuts formed at the upstream position of the transport path, the degassing is performed at a fixed position even in the packaging bag. It was not possible to place an incision for use, and the commercial value was reduced. In addition, the gas vent valve attached at the downstream position of the transport path may be displaced from the cutting position, which may cause defective products.
[0012]
Furthermore, in the latter prior art, the gas vent valve is sucked by the suction means when the gas vent valve is attached and transported, so the gas vent valve is held by suction due to clogging of the suction surface or the presence of foreign matter. Insufficient force could cause a gas vent valve to be transported or stuck.
[0013]
The present invention has been made in view of the above-described circumstances, and an object thereof is to enable a check valve to be attached to a film at regular intervals.
[0014]
Another object of the present invention is to ensure that the check valve is always mounted at a fixed position with respect to the lateral seal surface.
[0015]
Another object of the present invention is to provide a check valve supply device that can securely hold and transport the check valve when the check valve is mounted.
[0016]
[Means for Solving the Problems]
In order to achieve the above-described object, the invention of claim 1 is provided with a film supply roll upstream, and the packaging film fed from the film supply roll is vertically sealed downstream to form a cylinder, and the horizontal In the vertical bag making and filling and packaging machine to form a packaging bag by sealing, provided between the pre-feeding means provided at the upstream position of the film transport path close to the film supply roll, the film supply roll and the pre-feeding means, A check valve mounting means for mounting a check valve on the packaging film fed to the film transport path, and a check valve mounted on the packaging film provided at a predetermined position downstream of the check valve mounting means. And a pre-feeding means for pre-feeding the packaging film intermittently for a predetermined length based on a detection signal from the check valve detecting sensor. Characterized in that it was.
[0017]
According to this configuration, the film feeding (preliminary feeding) to the check valve mounting position by the check valve supplying means is performed by the preliminary feeding means provided at the upstream position of the film conveyance path close to the film supply roll. The film feed amount by the check valve supply means and the film passage amount at the check valve mounting position substantially coincide with each other without being affected by the stretch or slip of the film while traveling on the transport path. And since the preliminary | backup delivery means performs the preliminary | backup delivery of a film based on the detection signal from a non-return valve detection sensor, the preliminary | backup delivery amount on the basis of the position of the non-return valve mounted on the film is controlled, As a result, it is possible to always attach the check valve to the film at a constant interval.
[0018]
Here, it is preferable that the preliminary feeding means includes a feeding roller driven by a servo motor, which makes it possible to control the feeding of the film with high accuracy and further stabilize the check valve mounting interval. It can be a fixed interval.
[0019]
In addition to the structure of the above-mentioned claim 1 or 2, the invention of claim 3 includes a film feeding means provided at a downstream position of the film transport path close to a position for laterally sealing the packaging film, and an upstream vicinity of the film feeding means. A second check valve detection sensor provided at a predetermined position and detecting a check valve mounted on the packaging film at the position, and the film feeding means detects a detection signal from the second check valve detection sensor. Based on the above, the present invention is characterized in that the packaging film is intermittently delivered to the downstream side for a predetermined length.
[0020]
According to this structure, the film feeding to the horizontal seal position is performed by the film feeding means provided in the vicinity of the position, and the amount of feeding by the film feeding means is detected from the second check valve detection sensor. Therefore, the feeding to the horizontal seal position can be performed while always maintaining a constant interval on the basis of the position of the check valve mounted on the film. Therefore, the horizontal seal position is fixed with respect to the check valve, and as a result, a high-quality packaging bag in which the check valve is always arranged at a fixed position can be manufactured.
[0021]
Further, the invention of claim 4 includes check valve supply means in which the check valve mounting means takes out the check valves one by one and conveys them to the mounting position of the packaging film. A supply chute for supplying a check valve, an inlet communicating with the supply chute and an outlet for discharging the check valve, an accumulating portion for accumulating the check valves between the inlet and the outlet, and an outlet of the accumulator The holding means that holds the check valve in the accumulation part with an opening and closing member that is constantly biased in the direction of closing the outlet, and presses the check valve accumulated in the accumulation part to the outlet side to open and close The member is opened against the urging force, the pushing means for discharging the check valves in the accumulation part one by one from the outlet, the check valve discharged from the outlet of the accumulation part, and the predetermined supply position And a transporting means for transporting up to.
[0022]
According to the fourth aspect of the present invention, the check valves are sent one by one with a simple configuration, and the fed check valves are gripped and conveyed to the supply position. The check valve can be transported easily and at low cost.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Fig.1 (a) is a block diagram which shows the whole vertical bag making filling packaging machine which concerns on embodiment of this invention, FIG.1 (b) is the elements on larger scale of (a).
[0024]
First, the outline of the vertical bag making filling and packaging machine shown in FIGS. 1 (a) and 1 (b) will be described. The most upstream supply roll 10 in the transport path (shown by a dashed line in the figure) of the film 1 is a roller. The film 1 is wound many times, and a brake (not shown) is provided to prevent the film 1 from being advanced due to inertia. Moreover, two swingable tension rollers 11 are provided immediately downstream of the supply roll 10, and the tension acting on the film 1 is stabilized by these tension rollers 11.
[0025]
A vacuum chamber 12 is provided downstream of the tension roller 11 so that the film 1 fed from the supply roll 10 can be stored in the vacuum chamber 12 and supplied to the downstream side without excess or deficiency. The vacuum chamber 12 is provided with a sensor 12a that detects the amount of film 1 accumulated.
[0026]
Downstream of the vacuum chamber 12, there is provided a marking unit 13 for printing a bar code with a manufacturing date, a lot number, a price, etc., or a numerical arrangement indicating a shelf life. Further, a conveyance roller 14 and a brake roller 15 are arranged further downstream of the marking unit 13, and then a bag making tube 16 is arranged. As in the conventional apparatus shown in FIG. 12, the vertical sealer 17 in which the overlapping end of the film 1 is heat-sealed to form a vertical joint seal is formed around the bag-making tube 16, and the length of the packaging bag is intermittent. A pair of driven endless feeding belts 18 and a transverse sealer 19 for sealing and forming as a bag body to form a transverse sealing surface are disposed. Further, one lateral sealer 19 is provided with a film cutting cutter (see FIG. (Not shown) is built-in.
[0027]
In the present embodiment, in addition to the structure described above, a preliminary feeding roller 20 is disposed at an upstream position of the conveyance path close to the supply roll 10, specifically, at an intermediate position between the tension roller 11 and the vacuum chamber 12, A check valve mounting unit 100 (check valve mounting means) is disposed between the preliminary feeding roller 20 and the tension roller 11. The preliminary feeding roller 20 is driven by a servo motor to constitute preliminary feeding means for intermittently feeding a certain amount of film 1 from the supply roll 10. The check valve mounting unit 100 is a unit for mounting the check valve on the film 1 fed by the preliminary feeding roller 20.
[0028]
Further, a check valve detection sensor 21 is provided at a predetermined position downstream of the check valve mounting position by the check valve mounting unit 100 and upstream of the pre-feed roller 20, and is arranged on the transport path. The sensor 21 detects the check valve mounted on the traveling film 1 at the position. A registration mark detection sensor 22 further exists in the vicinity of the check valve detection sensor 21, and this will be described in an operation flowchart described later.
[0029]
With this configuration, the check valve is mounted in the vicinity of the supply roll 10 and a certain amount of the film 1 is fed along with the detection of the check valve, so that the check valve can be mounted at regular intervals.
[0030]
Furthermore, in the present embodiment, a check valve detection sensor 23 (second check valve detection sensor), an encoder is provided at a downstream position of the conveyance path close to the horizontal sealer 19, specifically, at a position immediately before the bag making tube 16. And a registration mark detection sensor 25 (second registration mark detection sensor). Among these, the length measuring element 24 measures the feeding length of the film 1 traveling on the conveyance path at the position.
[0031]
Next, the check valve mounting unit 100 will be described.
The check valve mounting unit 100 includes a check valve supply device 110 and a check valve fusion device 120. Among these, the check valve supply device 110 is disposed on the side facing the back surface of the film 1 fed out to the transport path, while the check valve fusion device 120 faces the surface of the film 1. It is arranged on the side to do.
[0032]
FIG. 2A is a schematic diagram schematically showing the function of the check valve mounting unit 100.
The check valve supply device 110 accumulates the check valve 2 supplied from the parts feeder 111 (see FIG. 1) in a storage unit 113 formed of a rod-shaped hollow rail via a supply chute 112 and The check valves 2 are taken out one by one from the lower end outlet, are gripped by the opening / closing chuck 114, and are transported horizontally to the back surface of the film 1.
[0033]
Further, the check valve fusion device 120 has a heater block 121 that can move horizontally. The heater block 121 is driven by a heater block drive cylinder 122 (see FIG. 1), and the check valve fusion device 120 is horizontally moved from a position facing the opening / closing chuck 114. A function of moving and abutting on the surface of the film 1, pressing the check valve 2 against the film 1 in cooperation with the opening and closing chuck 114, and heat-sealing the check valve 2 to the film 1 by heat of a built-in heater. Have.
Further, a plurality of needles 121 a protrude from the end face of the heater block 121, and a gas vent hole that penetrates the film 1 and reaches the check valve 2 is formed in the film 1 by piercing the needle 121 a into the film 1. It has a function to do.
[0034]
3 is a front view showing the detailed structure of the check valve supply device 110, and FIG. 4 is a side view of the same. In FIG. 4, the components related to the supply chute 112 and the pusher are omitted.
The supply chute 112 has a structure that descends obliquely toward the storage unit 113, and the check valves 2 supplied from the parts feeder 111 shown in FIG. It moves toward the entrance of the part 113.
[0035]
The accumulating portion 113 communicating with the supply chute 112 is erected so that the check valves 2 are arranged in a row and enter from the upper inlet and are discharged from the lower outlet. A bar-shaped pusher 115 for pushing out the check valve 2 is disposed at the upper part of the accumulating unit 113, and a holding means 116 for holding the check valve 2 is present at the lower part.
[0036]
The holding means 116 has an opening / closing member 117 that is always biased in a closing direction by a spring 117a, and the check valve 2 is sandwiched and held by the opening / closing member 117. The pusher 115 pushes down the check valve 2 by one by the reciprocating operation of the pusher drive cylinder 118. When the check valve 2 accumulated in the accumulation unit 113 is pushed down by driving the pusher 115, the one check valve 2 held by the opening / closing member 117 of the holding means 116 resists the bias of the spring 117a. Then discharged.
[0037]
An opening / closing chuck 114 is provided at a position for receiving the discharged check valve 2. The opening / closing chuck 114 constitutes a part of the conveying means, and is biased in a direction to be always closed by a spring. The open / close chuck 114 receives one check valve 2 pushed out from the holding means 116 and securely holds the check valve 2 by the biasing force of the spring 114a. A support block 114b that supports the head surface of the check valve 2 is provided on the back side of the opening / closing chuck 114 (see FIG. 4).
[0038]
Thereafter, the check valve 2 gripped by the opening / closing chuck 114 is transported toward the back surface of the film 1 by the transport means moving horizontally by the driving force of the transport drive cylinder 119. As described above, the check valve 2 is mounted on the film 1 in cooperation with the check valve fusion device 120 that has moved horizontally from the surface side of the film 1.
[0039]
In this embodiment, the check valve 2 made of plastic having the shape shown in FIG. 2B is a supply target, and the peripheral surface 2 a of the check valve 2 is held by the opening / closing chuck 114.
After the check valve 2 is mounted on the back surface of the film 1, the open / close chuck 114 is opened by the operation of the open / close cylinder 114c, and the gripping state of the check valve 2 is released. In this way, the check valve 2 is reliably supplied to and attached to the back surface of the film 1.
[0040]
Next, the configuration and operation of the control system that controls the feeding process, the preliminary feeding process, and the check valve mounting process of the film 1 in the above-described vertical bag making filling and packaging machine will be described.
FIG. 5 is a block diagram showing the configuration of the control system.
In the figure, a central processing unit (CPU) 200 incorporated in a control panel has a communication interface 210, an input interface 220, a temperature adjustment interface 230, a servo interface 240, and an output interface 250 as its interfaces. Among these, the communication interface 210 exchanges data with the touch panel 211, and for example, numerical setting such as the length of the packaging bag or the mounting position of the check valve 2 or temperature setting is performed.
[0041]
The input interface 220 detects from a check valve detection sensor 21 for preliminary feeding, a check valve detection sensor 23 for film feeding, a registration mark detection sensor 22 for preliminary feeding, and a registration mark detection sensor 25 for film feeding. A signal is input.
[0042]
A registration mark is a film feeding reference mark attached to a film with a pattern, and the film is fed out for one packaging bag based on the registration mark, and the registration mark of the packaging bag matched to the pattern is executed. Molding is realized.
[0043]
The temperature adjustment interface 230 is a control interface for the check valve welding heater 121 b built in the heater block 121 of the check valve fusion device 120.
[0044]
The servo interface 240 performs servo control on the servo amplifiers 243 and 244 in order to control the rotational speeds of the preliminary feeding servomotor 241 and the film feeding servomotor 242, respectively. Here, the preliminary feeding servomotor 241 is the rotational driving source of the preliminary feeding roller 20 described above, and the film feeding servomotor 242 is the driving source of the film feeding belt 18 described above. Here, the preliminary feeding servo motor 241 is provided with an encoder (not shown) for measuring the preliminary feeding amount of the film 1 based on the number of rotations thereof. The amount of film 1 fed by the film feeding servo motor 242 is measured by the length measuring element 24 described above.
[0045]
The output interface 250 controls the pusher drive cylinder 118, the transfer drive cylinder 119, the opening / closing cylinder 114c, and the heater block drive cylinder 122, respectively.
[0046]
By adopting such a configuration, on the input side, the check valve 2 and the registration mark are detected by various sensors 21, 22, 23, and 25, and numerical value setting and temperature setting are performed by the touch panel 211. On the output side, temperature control of the check valve welding heater 121b is performed, servo motor control for preliminary feeding or film feeding is performed, and driving control of various cylinders 118, 119, 122 for conveyance is performed. It will be.
[0047]
6 to 11 are flowcharts for explaining the processing operation by the control system described above.
In the following processing operation, the case where the check valve 2 is attached to the film 1 without the registration mark and the case where the check valve 2 is attached to the film 1 having the registration mark are processed separately. The pattern position control of the packaging bag is prioritized over the control of the attachment position of the check valve 2 for the film 1 having the registration mark.
[0048]
As shown in FIG. 6, when the apparatus is activated, it is first determined whether or not the preparatory work has been completed (step S1). In this step, the film 1 is fed out to the horizontal seal position by the horizontal sealer 19 through the conveyance path, and further, two to three packaging bags are blanked to confirm that there is no malfunction.
[0049]
Next, it is determined whether each processing operation is executed or the processing operation is ended based on the presence or absence of a start signal sent from a main control unit (not shown) that controls the entire vertical bag filling and packaging machine. (Step S2). The vertical bag making filling and packaging machine intermittently executes a series of operations necessary for manufacturing a packaging bag, but a start signal is output from the main control unit each time the intermittent operation for one cycle is completed.
[0050]
When the CPU 200 included in the control system shown in FIG. 5 inputs a start signal, the film feeding process, the preliminary feeding process, and the check valve mounting process are executed in parallel based on the start signal. .
[0051]
In the film feeding process, the control operation varies depending on whether the supplied film 1 requires pattern matching (film with registration marks). Whether the pattern matching is necessary is set in advance by the touch panel 211 and stored in the memory of the CPU 200. Based on the setting information, the CPU 200 determines whether or not pattern matching is necessary (step S3). If pattern matching is necessary, the CPU 200 executes a film feeding process A corresponding to the pattern matching (step S4). This feeding process A is executed according to a subroutine shown in FIG. On the other hand, when the pattern matching is not necessary, a film feeding process B corresponding to the pattern matching is executed (step S5). This feeding process B is executed according to a subroutine shown in FIG.
[0052]
In the film feeding process A when the pattern alignment is necessary, as shown in FIG. 7, the film feeding servo motor 242 is rotated to carry out the feeding of the film 1 to the horizontal seal position (step S10). Then, from the time when the registration mark detection sensor 25 for feeding the film detects the registration mark (step S11), the length measuring element 24 shown in FIG. 1 measures the feeding amount and feeds the film for a preset length. The operation is continuously executed (step S12), and when the film feeding operation for the set length is completed, the rotation of the film feeding servo motor 242 is stopped (step S13).
[0053]
The film feed amount after detecting the registration mark takes into account the length of one packaging bag, the registration mark position on the film 1, the distance from the registration mark detection position to the horizontal seal position, etc. The feeding amount is set in advance so that proper pattern matching can be realized, and this setting information is stored in the memory of the CPU 200.
[0054]
On the other hand, in the film feeding process B when pattern alignment is not required (no registration mark), the film feeding servo motor 242 is rotated to feed the film 1 to the horizontal seal position as shown in FIG. (Step S20). Then, from the point in time when the check valve detection sensor 23 for feeding the film detects the check valve 2 (step S21), the length measuring element 24 shown in FIG. 1 measures the feed amount, and the length is set in advance. The film feeding operation is continuously executed (step S22), and when the film feeding operation for the set length is completed, the rotation of the film feeding servo motor 242 is stopped (step S23).
[0055]
As described above, the film feed amount can be controlled by detecting the check valve 2 by the check valve detection sensor 23 even for the film without the registration mark for which the registration mark sensor 25 cannot be used. The position can be stabilized at a fixed position.
[0056]
In this case, the amount of the film fed after the check valve 2 is detected is the length of one packaging bag, the position of the check valve 2 attached to the film 1, and the check valve detection position. The check valve 2 is set in advance so that the check valve 2 is disposed at an appropriate position of the packaging bag in consideration of the distance to the position where the valve 2 is mounted, and this setting information is stored in the memory of the CPU 200. .
[0057]
Next, in the preliminary feeding process, the control operation changes depending on whether the supplied film 1 is a film that requires pattern matching (a film with registration marks). Based on the setting information relating to the pattern matching stored in the memory of the CPU 200, the CPU 200 determines whether or not the pattern matching is necessary (step S6), and if the pattern matching is necessary, executes the preliminary feeding process C corresponding thereto (step S6). S7). The preliminary feeding process C is executed according to a subroutine shown in FIG. On the other hand, if the pattern matching is not necessary, a preliminary feeding process D corresponding to the pattern matching is executed (step S8). This feeding process D is executed according to a subroutine shown in FIG.
[0058]
In the preliminary feeding process C when the pattern alignment is necessary, as shown in FIG. 9, the preliminary feeding servomotor 241 is rotated to execute the preliminary feeding of the film 1 to the check valve mounting position (step S30). . Then, from the time when the registration mark detection sensor 22 for preliminary feeding detects the registration mark (step S31), the encoder attached to the preliminary feeding servomotor 241 measures the feeding amount and the length set in advance. This preliminary feeding operation is continuously executed (step S32), and when the film feeding operation for the set length is completed, the rotation of the preliminary feeding servomotor 241 is stopped (step S33).
[0059]
Note that the pre-feeding amount after the registration mark is detected also corresponds to the length of one packaging bag, the position on the film 1 where the check valve 2 is to be mounted based on the registration mark, and the registration mark detection. In consideration of the distance from the position to the position where the check valve 2 is mounted, a preliminary feed amount that can be mounted at the appropriate position is set in advance, and this setting information is stored in the memory of the CPU 200 Has been.
[0060]
In the present embodiment, as described above, the check valve 2 is mounted on the back side of the film 1 (that is, the inside of the packaging bag). In such a case, a pattern (check valve position display) for clearly indicating the mounting position of the check valve 2 is often printed on the surface of the film 1. According to the present embodiment, since the check valve 2 is mounted together with the pattern alignment based on the registration mark, the check valve 2 can be mounted with accurate positioning with respect to the check valve position display. it can.
[0061]
On the other hand, in the preliminary feeding process D when the pattern alignment is unnecessary, as shown in FIG. 10, the preliminary feeding servomotor 241 is rotated to perform preliminary feeding of the film 1 to the check valve mounting position (step). S40). Then, from the time when the check valve detection sensor 21 for preliminary feeding detects the check valve 2 (step S41), the encoder attached to the preliminary feeding servo motor 241 measures the feeding amount and is set in advance. The preliminary feeding operation for the length is continuously executed (step S42), and when the preliminary feeding operation for the set length is completed, the rotation of the preliminary feeding servo motor 241 is stopped (step S43).
[0062]
As described above, even for a film without a registration mark for which the registration mark sensor 25 cannot be used, the preliminary feeding amount can be controlled by detecting the check valve 2 by the check valve detection sensor 23, so that the check valve 2 can be set at regular intervals. Can be mounted stably.
[0063]
In addition, also about the preliminary | backup delivery amount after detecting the non-return valve 2, from the length for one packaging bag, the position where the non-return valve 2 should be mounted in a packaging bag, and the detection position of the non-return valve 2 Considering the distance to the position where the check valve 2 is mounted, the preliminary feed amount that can be mounted on the film 1 at an appropriate interval is set in advance, and this setting information is stored in the memory of the CPU 200. Has been.
[0064]
Next, the check valve mounting process is executed according to a subroutine shown in FIG.
That is, when the process proceeds to the check valve mounting process based on the start signal, first, the pusher drive cylinder 118 is operated to push down the pusher 115, thereby discharging only one check valve 2 accumulated in the accumulation unit 113 from the outlet. Then, the open / close chuck 114 is held (step S50).
[0065]
Next, the conveyance drive cylinder 119 is operated to horizontally move the opening / closing chuck 114 for gripping the check valve 2 toward the film 1 and press the check valve 2 against the back surface of the film 1 (step S51). At substantially the same time, the heater block drive cylinder 122 is operated to move the heater block 121 horizontally toward the film 1 and press the heater block 121 against the surface of the film 1 (step S52). By these operations, the opening / closing chuck 114 and the heater block 121 cooperate to heat-seal the check valve 2 to the film 1 and to degas the film 1 by a needle 121a provided on the heater block 121. A hole is formed.
[0066]
Further, the open / close cylinder 114c is operated to open the open / close chuck 114, and the gripping state of the check valve 2 is released (step S53), and then the transfer drive cylinder 119 is operated to retract the open / close chuck 114 and the heater block. The drive cylinder 122 is actuated to retract the heater block 121 (step S54).
With the above operation, the check valve 2 mounting process is completed, but the time required for these processes is longer than the preliminary feeding process described above. After the feeding process ends.
[0067]
Returning to FIG. 6, the CPU 200 monitors an end signal sent from a main control unit (not shown) that controls the entire vertical bag making filling and packaging machine (step S <b> 60), and inputs the end signal. Then, the processing operation described above is terminated. On the other hand, while the end signal is not input, each processing operation described above is repeated based on the input of the start signal.
[0068]
【The invention's effect】
As described above, according to the vertical bag making filling and packaging machine of the present invention, the film feeding (preliminary feeding) to the check valve mounting position by the check valve supply means is performed upstream of the film transport path close to the film supply roll. Since it is performed by the preliminary feeding means provided at the position, it is not affected by film stretch or slip during traveling on a long conveyance path, and the film feeding amount by the check valve supply means and the film passing at the check valve mounting position The amount is almost the same. And since the preliminary | backup delivery means performs the preliminary | backup delivery of a film based on the detection signal from a non-return valve detection sensor, the preliminary | backup delivery amount on the basis of the position of the non-return valve mounted on the film is controlled, As a result, it is possible to always attach the check valve to the film at a constant interval.
[0069]
Further, the film feeding means to the lateral seal position is performed by a film feeding means provided in the vicinity of the position, and the feeding amount by the film feeding means is controlled based on the detection signal from the second check valve detection sensor. If it is set as the structure which carries out, it can pay out to a horizontal seal position always maintaining a fixed space | interval on the basis of the position of the non-return valve with which the film was mounted | worn. Therefore, the horizontal seal position is fixed based on the check valve on the film, and as a result, a high quality packaging bag in which the check valve is always arranged at a fixed position can be manufactured.
[0070]
Further, if the check valve supply means of claim 4 is provided, the check valves are sent out one by one with a simple configuration, and the fed check valves are gripped and conveyed to the supply position. Compared to the means, reliable transfer of the check valve can be realized easily and at low cost.
[Brief description of the drawings]
FIG. 1A is a configuration diagram showing an entire vertical bag making filling and packaging machine according to an embodiment of the present invention, and FIG. 1B is a partially enlarged view of FIG.
FIG. 2A is a schematic view schematically showing the function of a check valve mounting unit, and FIG. 2B is an enlarged perspective view showing the check valve.
FIG. 3 is a front view showing a detailed structure of the check valve supply device.
FIG. 4 is a side view showing a detailed structure of a check valve supply device.
FIG. 5 is a block diagram showing the configuration of a control system that controls film feeding processing, preliminary feeding processing, and check valve mounting processing in a vertical bag making filling and packaging machine.
6 is a flowchart showing a main routine of processing operations by the control system shown in FIG. 5. FIG.
FIG. 7 is a flowchart showing a subroutine of step S4 in the main routine shown in FIG.
FIG. 8 is a flowchart showing a subroutine of step S5 in the main routine shown in FIG.
FIG. 9 is a flowchart showing a subroutine of step S7 in the main routine shown in FIG.
10 is a flowchart showing a subroutine of step S8 in the main routine shown in FIG.
11 is a flowchart showing a subroutine of step S9 in the main routine shown in FIG.
FIG. 12 is a diagram showing an outline of a conventional apparatus.
[Explanation of symbols]
1: Film
2: Check valve
10: Supply roll
11: Tension roller
12: Vacuum chamber
13: Sealing unit
14: Conveying roller
15: Brake roller
16: Bag making tube
17: Vertical sealer
18: Feeding belt
19: Side sealer
20: Pre-feed roller
21: Check valve detection sensor
22: Registration mark detection sensor
23: Check valve detection sensor (second check valve detection sensor)
24: Chosenko
25: Registration mark detection sensor
100: Check valve mounting unit
110: Check valve supply device
111: Parts feeder
112: Supply chute
113: Accumulator
114: Opening and closing chuck
114a: Spring
114c: Open / close cylinder
115: Pusher
116: Holding means
117: Opening / closing member
117a: Spring
118: Pusher drive cylinder
119: Transport drive cylinder
120: Check valve fusion device
121: Heater block
121a: needle
122: Heater block drive cylinder

Claims (4)

In the vertical bag making filling and packaging machine provided with a film supply roll upstream, and forming a packaging bag while forming a cylindrical bag while vertically sealing the packaging film fed from the film supply roll downstream,
Preliminary feeding means provided at an upstream position of the film transport path close to the film supply roll;
A check valve mounting means that is provided between the film supply roll and the preliminary feeding means, and that mounts a check valve on the packaging film fed to the film transport path;
A check valve detection sensor provided at a predetermined position downstream of the check valve mounting means and detecting the check valve mounted on the packaging film at the position;
The preliminary feeding means is configured to intermittently preliminarily feed the packaging film by a length for mounting the check valve on the packaging film at a constant interval based on a detection signal from the check valve detection sensor. Vertical bag making filling and packaging machine. In the vertical bag making filling and packaging machine according to claim 1,
The pre-feeding means includes a feeding roller driven by a servo motor, and is a vertical bag making filling and packaging machine. In the vertical bag making filling and packaging machine according to claim 1 or 2,
Film feeding means provided at a downstream position of the film transport path close to a position for laterally sealing the packaging film;
A second check valve detection sensor provided at a predetermined position in the vicinity of the upstream side of the film feeding means and detecting a check valve mounted on the packaging film at the position;
The film feeding means intermittently feeds the packaging film to the downstream lateral seal position while maintaining a constant interval based on the check valve based on the detection signal from the second check valve detection sensor. A vertical bag making and filling machine characterized by having a configuration. In the vertical bag making filling and packaging machine according to any one of claims 1 to 3,
The check valve mounting means includes a check valve supply means that takes out the check valves one by one and conveys them to the mounting position of the packaging film,
The check valve supply means includes a supply chute for supplying a check valve,
An accumulator that has an inlet communicating with the supply chute and an outlet that discharges the check valve, and stores the check valves side by side between the inlet and the outlet;
A holding means for holding a check valve in the storage unit by an opening / closing member provided at the outlet of the storage unit and constantly biased in a direction to close the outlet;
Extrusion means for opening the opening / closing member against its urging force by pressing the check valve accumulated in the accumulation portion toward the outlet side, and discharging the check valves in the accumulation portion one by one from the outlet When,
A gripping means for gripping the check valve discharged from the outlet of the storage section and transporting it to a predetermined supply position;
A vertical bag making filling and packaging machine comprising:

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