JPH04128105A - Method and device for controlling vertical type bag making and packaging machine - Google Patents

Abstract

PURPOSE:To eliminate the need for a temporary stop of a packaging machine to improve packaging capacities by reducing the speed of said machine when feed of product is delayed and increasing at once the speed thereof when a product is supplied while the speed thereof is reduced. CONSTITUTION:When a product 34 is fed into a hopper 36, a product detection sensor S5 detects the product to actuate a fall down timer to start counting so that, after a predetermined time, servomotors SM1 and SM2 for driving respectively a film feed mechanism 30 and a lateral seal mechanism 38 are rotated to increase the speed of said mechanism to a certain level. When next product 34 is not supplied, the speed of the servomotors SM1, SM2 is reduced after the lapse of time it takes for a bag to be packaged and then stopped. When two or more products are continuously supplied and an action reference signal is inputted based on the detection of said product, the servomotors SM1, SM2 continuously rotate at a constant speed. When next product is detected after the lapse of one cycle after the first detection of product, i.e., after (a) seconds, the servomotors SM1, SM2 maintain reduced speed for a specified period and then increase again the speed according to a specified timing table to perform the packaging of the product 34 of second feed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention is a vertical bag-form-fill-seal packaging machine that is capable of continuously feeding out film. When the drive system of the machine starts to decelerate toward a stop, if the supply of the product is detected during the deceleration, the packaging machine is immediately accelerated from the deceleration state to prevent the product from being supplied late. The present invention relates to a control method and apparatus for a vertical form-fill-seal packaging machine capable of handling the packaging of the products and improving productivity.

PRIOR ART A packaging film unwound from an original roll is formed into a cylindrical shape using a bag making machine, and this cylindrical film is fed downward along the outer periphery of a vertical hollow mandrel while being vertically sealed. A vertical form-fill-fill packaging machine is used in various industries to drop and feed a product onto a cylindrical film through a mandrel, and to perform horizontal sealing and cutting before and after sandwiching the product in the cylindrical film to obtain a so-called pillow package. It has come to be widely used in the field.

Problems to be Solved by the Invention In this type of vertical form-fill-fill-seal machine, when the product to be packaged is a loose product such as candy, the product is weighed in advance by a metering and feeding device, and then the product is placed in a cylindrical shape. It is designed to be supplied in fixed quantities into the film. In this case, it is preferable to control the metering operation in the metering and feeding device so that the product falls into the cylindrical film at the opening timing of the horizontal sealer in the first packaging cycle. Upon receiving the preparation completion signal from the metering and feeding device, the packaging machine outputs a product drop request signal to the metering and feeding device.

As a result, the product that has been measured by the metering and feeding device will be
At the opening timing of the horizontal sealer in the next cycle, the cylindrical film is dropped and the pillow packaging is suitably applied. Further, if there is no input of a ready signal from the metering/feeding device during the cycle, the driving of the packaging machine in the next cycle is stopped. As a packaging machine that performs such control, there is an invention disclosed in, for example, Japanese Unexamined Patent Publication No. 63-272609.

It is preferable to control the weighing operation in the weighing and feeding device in this way in order to perform raw packaging reliably. However, on the other hand, during one cycle based on the packaging capacity, from the feeding machine side such as the weighing device, If the preparation completion signal is not output for some reason, there is a drawback that the packaging machine always stops in the next cycle. In this case, a serious problem arises in that the overall productivity is significantly reduced because continuous packaging work cannot be performed.

Purpose of the Invention The present invention was proposed in order to solve the problems inherent in the vertical bag-form-fill-seal packaging machine according to the prior art described above. Even if the preparation completion signal (supply signal) is not input from , if the supply signal is input during the next cycle, the drive of the packaging machine, which was decelerating to stop, is immediately increased in speed, This allows us to deal with products that are delivered late.

An object of the present invention is to provide a control method and device for a vertical form-fill-seal packaging machine that improves the productivity of the packaging machine.

Means for Solving 11 Problems In order to overcome the above problems and achieve the intended purpose, the present invention provides a method for controlling a vertical bag-forming-fill-sealing machine.

The film fed from the raw roll is formed into a cylindrical shape using a bag making machine, and the cylindrical film is continuously fed downward by a film feeding mechanism driven by a servo motor, and the cylindrical film is A vertical seal is applied to the overlapping edge of the
In a vertical bag-forming-fill-sealing machine that detects the falling supply of a product onto the cylindrical film with a product detection means, and horizontally seals and cuts the cylindrical film at upper and lower positions sandwiching the product using a lateral sealing mechanism.

After a required period of time has elapsed from the time when the product is detected by the product detection means, an operation reference signal is generated for the packaging machine, and in response to this operation reference signal, the speed of the servo motor that drives the film feeding mechanism is increased until it reaches a predetermined speed. .

If the operation reference signal related to the next product supply is not input by the end of the machine cycle of the packaging machine, the servo motor that drives the film feeding mechanism starts decelerating.

If the operation reference signal is input while the servo motor is decelerating, the servo motor is controlled to a predetermined speed according to the timing table of the deceleration range from the time the servo motor starts decelerating to the time the operation reference signal is generated. It is characterized by increasing speed until it reaches .

In addition, in order to suitably achieve this method, a control device for a vertical form-fill-seal packaging machine according to another invention of the present application forms a film unwound from a raw roll into a cylindrical shape using a bag-making machine, and forms the film into a cylindrical shape. A first servo motor drives a film feeding mechanism that feeds the film downward, and a horizontal sealing mechanism that applies horizontal seals to the cylindrical film whose longitudinal edges are vertically sealed before and after the product is sandwiched. a second servo motor, a pulse generating means for generating a reference signal for synchronously operating the first servo motor and the second servo motor, a product detecting means for detecting falling supply of a product onto the cylindrical film, and a packaging machine. a first timer that generates an operation reference signal for a machine cycle in the packaging machine after a predetermined time has elapsed from the time when the product detection signal is generated by the product detection means, depending on the machine capacity of the product detection means; a second timer set regarding the time up to the time when the horizontal sealer engages in the horizontal sealing mechanism; and various data necessary for packaging in the packaging machine and increase/deceleration values of the first servo motor and the second servo motor. a data setting means for inputting data and a value related to the first timer; and based on the value set and input by the data setting means,
The present invention is characterized by comprising a control means for controlling the operation of the packaging machine by creating a timing table regarding the speed and position of the first servo motor and the second servo motor.

Embodiments Next, preferred embodiments of the control method and apparatus for a vertical bag-forming-fill-sealing machine according to the present invention will be described.

7. As shown in FIGS. 1 and 2, a film 12 wound around a raw roll 10
is a pair of feeding rollers 14. , 14, and a dancer roller 16 and a large number of guide rollers 1, which will be described later.
The bag is fed to the bag making machine 20 via the bag making machine 20. The feeding rollers 14, 14 are driven by a general-purpose motor M whose speed can be controlled by an inverter 22.

The bag making device 20 is arranged substantially concentrically above the hollow mandrel 24 which is arranged upright, and the film 12 is formed into a cylindrical shape by passing through this bag making device 20. The cylindrically formed film 12 is placed along the outer periphery of the mandrel 24 and is fed downward by a film feed mechanism 30 consisting of feed rollers 25, 26 and a feed belt 28 arranged outside the mandrel 24. Ru. Note that the overlapping end edges of the tubular film 12 in the longitudinal direction are pinched by the feed rollers 25 and 26 and fed downward, and during the feeding, the overlapping end edges are covered with both rollers 25 and 2.
The vertical seal is moved by a vertical sealer 33 disposed between 6 and 6.

As shown in FIG. 2, the film feeding mechanism 30 includes a first servo motor SM controlled by a servo amplifier 32.
1. The servo motor SM1 is provided with a rotary encoder E1 that detects the position of one rotation, and its output is supplied to the servo amplifier 32 and the servo control section 42.

Further, a hopper 36 into which various products 34 are placed is arranged directly above the bag making machine 20, and its axis is aligned with the mandrel 24 located below.

Furthermore, near the opening of the hopper 36! Liii! A product detection sensor Ss for detecting the supply of the product 34 is provided.

A supply device (not shown) is provided above the hopper 36 to continuously drop and supply products.

As this feeding device, for example, a large number of packets are provided at required intervals on a hot end chain, and the product filled in each packet is
A packet conveyor is preferably used, which is caused to drop and supply packets to the hopper 36 by driving the chino. The product detection sensor SS detects the product 3 that is dropped and supplied from the supply device.
4 is detected, and the product detection signal is input to the register unit 50 via the sensor input interface 56 shown in FIG.

An example of "!li! product detection" using this product detection sensor SS.

Looking at various feeding devices, in the volume cup method where the product is divided into fixed volumes using cups and placed into the hopper of the packaging machine, the moment when the packaging machine issues an OK signal is considered to be the "product detection input". In addition, in the above-mentioned packet conveyor, input from a product detection sensor disposed near the hopper is regarded as "product detection human power". In addition, in the case of a computer scale such as a weighing and feeding device that measures and supplies the weight of the product, a supply completion signal from the scale is used to detect the product manually.
During normal operation, a ``supply OK signal'' is output to the attached supply device to indicate that it is OK to supply the product.

Below the mandrel 24, there is a horizontal sealing mechanism 38, which consists of horizontal sealers 37, 37 arranged opposite each other so as to be rotatable in opposite directions, and applies horizontal sealing to the tubular film 12 by the rotation of these horizontal sealers 37, 37. It is arranged. This horizontal seal mechanism 38 is connected to a servo amplifier 40 shown in FIG.
is driven by a second servo motor SM, which can be controlled by a second servo motor SM. This second servo motor SM is provided with a rotary encoder E2 that detects the rotational position, and its output is supplied to the servo amplifier 40 and the servo control section 42.

FIG. 2 is a block diagram schematically showing the control circuit 44 of the vertical form-fill-seal packaging machine according to the present embodiment, and includes a data processing calculation unit 46 that performs calculation processing of input data, and a first servo motor. SM, a servo control unit 42 that controls the second servo motor SM2, and the feeding rollers 14, 1.
an inverter control unit 48 that performs variable speed control of the general-purpose motor M that drives the motors S Ml and S M2;
．． It basically includes a register unit 50 that stores control data regarding M. The operation panel 52 provided on the packaging machine main body has a keyboard for inputting various data, buttons for commanding start/stop of the packaging machine, etc. The input data from the keyboard is transferred to the operation panel interface 54.
The data is stored in the register section 50 via the. This input data includes numerical data regarding the amount of cylindrical film 12 to be sent out and packaging capacity required for one pillow packaging, first and second
These include the increase/deceleration values of the servo motors S Ml and S M, the speed increase ratio of the film feeding motor M, and the like.

Further, a sensor S1 detecting the rise of the dancer roller 16;
Seyusa SZ (
9), the origin confirmation sensor S3 of the horizontal sealers 37, 37, the register mark detection sensor S4 attached to the film 12, and the product detection sensor SS. The data is taken into the register section 50 via the register section 50.

Furthermore, reference numeral 58 indicates a pulse generating means, typically a clock pulse generator, which generates pulses at predetermined intervals to synchronize the positions and speeds of the first servo motor SM and the second servo motor SM2. . This pulse may be created by software, or may be generated using a motor that rotates only the encoder.

Next, the dancer roller 16 and the film feed roller 14
, 14 will be explained. The feeding rollers 14, 14 are driven by a general-purpose motor M controlled by an inverter 22. In this case, the motor M is controlled by proportional control synchronized with the increase/deceleration control of the first servo motor SM1 for film feeding. At the same time, (1) control is performed to increase the speed of feeding and temporarily stop feeding depending on the current position of the dancer roller 16. Figures 9(a) to (c)
), the support rod 17 on the dancer roller 16
A rise detection sensor S and a fall detection sensor S2, which are comprised of, for example, a photoelectric sensor, are provided in close proximity to the pivot point. If the dancer roller 16 falls within the required range shown in FIG. 9(b).

Both sensors S1. S2 is not shielded from light by the illustrated timing plate 19, and the general-purpose motor M of the feeding rollers 14, 14 is controlled to rotate at a required speed ratio with respect to the first servo motor SM□.

If the dancer roller 16 rises above the required range, as shown in FIG. 9(a), the general-purpose motor M is accelerated to a predetermined speed based on a preset speed increase ratio,
This controls the feeding roller 14°14 to rotate at high speed, and furthermore, the dancer roller 16 is rotated as shown in FIG. 9(c).
), if it falls below the required range, the general-purpose motor M is stopped and the feeding of the film 12 by the rollers 14, 14 is stopped. After that, when the dancer roller 16 rises to the required range, control is performed to rotate the general-purpose motor M again at a speed proportional to the speed of the first servo motor SM.

Also, between the upper and lower film feed rollers 25 and 26 that constitute the film feed mechanism 30, the circumferential speed of the roller 26 on the downstream side is set slightly higher than the roller 25 on the upstream side, so that tension is applied to the film 12 being fed. A mechanism is provided to provide this. Thereby, the tension of the film between the film feeding rollers 14, 14 and the film feeding mechanism 30 is kept constant, and the bag making device 20 can stably make a cylindrical bag.

Next, in this example, "machine capacity" and "machine cycle"
, "drop timer" and "wrapping timer" are relevant and each will be explained here. In response to the supply OK signal from the packaging machine, product 3 is delivered without delay from the supply device.
4, the film feed in the packaging machine is continuous at a constant speed, and the number of films that can be wrapped per minute in this state is called "machine capacity". Further, the value of "60÷machine capacity", that is, the time required to package one bag expressed in seconds, is called a "machine cycle" or "one cycle".

In the ideal continuous state shown in Figure 5 below, the machine cycle is equal to the time required to package one bag, but as shown in Figure 4, if there is a delay in the supply of the product 34, or if the machine cycle is If the product 34 is not supplied at the same time, the time required for packaging one bag will be longer than the machine cycle. The start of this machine cycle is set at the point in time when an operation reference signal is generated, which is a time corresponding to a fall timer (described later) after product detection.

In addition, a "fall timer" is used to set the time from when the product is detected until the film feed mechanism 3° and the horizontal sealing mechanism 38 start moving.
This is data calculated by the packaging timer (described later), and is used to control the film length required for each product supplied and to ensure that the film is fed horizontally between each product. The base point of the operation start timing of the mechanism 30 and the horizontal seal mechanism 38 is set. That is, the drop timer starts counting when the product detection sensor S5 detects the supply of the product 34, and counts up when the required set time has elapsed, and sends a so-called "operation reference signal" to the film feeding mechanism 30 and the horizontal sealing mechanism 38. ” gives an operation start command.

As shown in FIG. 6, if the set time of the drop timer is longer than the machine cycle time, before one drop timer counts up, the count of the drop timer is sequentially started by the detection of the next product.

Unless there is an emergency stop command, the detected products 34 are packaged without any delay. What is the setting time of the fall timer?

When the above-mentioned machine capacity is changed, the time from product detection until the horizontal sealers 37, 37 of the horizontal sealing mechanism 38 engage with each other (packaging timer described later) is automatically changed so as not to change. Therefore, when the machine capacity is increased, the fall timer is set to a longer time (see Figure 7).

Furthermore, as shown in FIG. 7, ■Product detection sensor S.

The sum of the time during which the drop timer is operating after detecting the product and the time required for the horizontal sealer 37 of the horizontal sealing mechanism 38 to move from the cycle stop position to the engagement position is calculated as the "packaging timer". ”, and the time r according to the mass of the product
IIJ settings are made (until correction input is performed, standard values according to the supply device are automatically set). As explained in the drop timer section, the falling speed of the product is constant from the moment the product is detected, so even if you change the packaging machine's capacity when packaging the same product, the value set by -degrees will always remain the same. remains constant.

Next, regarding the operation of the vertical bag-form-fill-seal packaging machine according to the example,
An example in which the supply device is a packet conveyor will be explained. Incidentally, for the sake of convenience, the timing tables regarding the increase/deceleration control described later and the increase/deceleration shown in FIGS.
This is about M1. Regarding the second servo motor SM that drives the horizontal sealing mechanism 38, the horizontal sealer 37 in the horizontal sealing mechanism 38 responds to the speed change given by the timing table of the first servo motor SM that drives the film feeding mechanism 30. , 37 are combined.

[Basic movements when packaging one bag of products] Operation panel 5
By operating the start command button of the packaging machine provided at 2, the packaging machine outputs a supply OK signal to the supply device W (not shown) consisting of a packet conveyor, and enters the state of waiting for the arrival of the product 34. enter. When the product 34 is loaded into the hopper 36 of the packaging machine from the supply device related to the packet conveyor, a product detection sensor S disposed close to the hopper 36
5 detects the fall of the product 34. As a result, the preset drop timer starts counting, and when the drop timer counts up after a certain period of time from product detection, the first servo motor SM1 that drives the film feed mechanism 30 and the horizontal seal mechanism 38 are driven. Second
The rotation of the servo motor SM is started, and its speed is increased until it reaches a constant speed. When the product 34 is not supplied from the packet conveyor, the product detection sensor S5 does not generate a product detection signal, so one cycle (time required for packaging one bag in continuous packaging operation) is determined by the capacity of the packaging machine. ) From the end point, the first servo motor SM and the second servo motor SM start decelerating and stop (see FIG. 3).

Note that the first servo motor SM1 and the second servo motor S
The increase/deceleration of M is controlled based on a preset increase/deceleration value, and the increase/deceleration of the lateral sealers 37, In order to perform control to match the peripheral speeds of rotation of the film feed mechanism 37, a constant speed range is set for the first servo motor SM1 of the film feed mechanism 30, as shown in FIG.

In this way, activation is started upon receiving the operation reference signal from the first product detection signal, but the next product 34 is not supplied, and the first servo motor SM1 and the first servo motor SM1 are If the next operation reference signal is not input before the second servo motor SM decelerates and stops, the motor enters a temporary stop standby state until the next operation reference signal is input.

(When two or more products are continuously fed) If the operation reference signal is input by the next product detection without delay by the end of each machine cycle of the packaging machine, the operation will be as shown in Figure 5. , the first servo motor S of the film feed mechanism 3o
M1 and the second servo motor SM of the horizontal seal mechanism,
The rotation is continuous at a constant speed (however, as mentioned above, the second servo motor SM of the lateral seal mechanism 30 is controlled by combining this constant speed timing table with the speed change control of the lateral sealers 37, 37. ).

Further, as shown in FIG. 4, when the operation reference signal is output as the drop timer counts up due to the next product detection after α seconds after one cycle has passed since the first product detection,
The first servo motor SM1 and the second servo motor SM, which have been decelerated since the end of one cycle, are accelerated again after maintaining deceleration for a predetermined time. Then, the second supplied product 34 is packaged, and at the end of the second machine cycle, the machine decelerates and stops, and enters a standby state. As a result, even products 34 whose supply has been delayed can be smoothly packaged without temporarily stopping the driving of the packaging machine.

(Regarding the timing table by which the servo motor is controlled) Next, regarding the basic concept of the timing table regarding the first servo motor SM1 that drives the film feed mechanism 3o and the second servo motor SM that drives the horizontal seal mechanism 38, the film The feed amount and the rotation amount of the horizontal sealers 37, 37 of the horizontal sealing mechanism 38 will be explained with reference to FIG.

From the end of the machine cycle, the first servo motor SM1
and the second servo motor SM, if the operation reference signal is not transmitted due to the next product detection due to a supply delay until the second servo motor SM starts decelerating and stops, a preset constant The surplus film fed between the start of deceleration and the stop of the first servo motor SM1, whose rotation is controlled according to the acceleration/deceleration value (the part indicated by the diagonal line A in FIG. 8), is processed by the next operation reference signal. From the time when the first servo motor SM1 starts increasing and decreasing, the amount is used to cover the shortfall in the film feed amount (the part indicated by the diagonal line A' in Fig. 8) until the speed reaches a constant speed, and the film feed amount is continuously fed. The drive is controlled based on a timing table that guarantees the same feed amount as in the case of .

Further, a similar timing table is given for the rotation amount of the horizontal sealers 37, 37 whose rotation is controlled by the second servo motor SM, and the rotation amount corresponding to the variable speed rotation during continuous rotation is guaranteed.

Furthermore, due to the delay in the product 34 being supplied from the supply device, the operation reference signal is not transmitted from the next product detection to the first and second servo motors SM1. If the operation is performed during deceleration of SM, the first servo motor SM1 and the second servo motor SM, from the time when the operation reference signal is input.
When the speed increases, the amount of film feed and the amount of rotation of the horizontal sealer become excessive. That is, in FIG. 8, one motor SM.

If the ordinate is a and the abscissa is b when the operation reference signal is input during deceleration of 8M2, both motors SM start from the b coordinate when the operation reference signal is input.

SM, should start increasing its speed. However, in this case, the film ends up being fed excessively in the area shown by diagonal lines B in FIG.

Therefore, the deceleration of both motors SM, SM, is stopped from the a coordinate, and the speed at that point is kept constant. Then, from the above coordinates, both motors SM,, SM.

From the C coordinate where the rising line (indicated by a broken line) intersects the constant speed speed line, assuming that the speed increase has started,
Both actual motors SM1. SM, starts speeding up. At this time, since the absolute values of the deceleration value and the acceleration value of both motors SM, SM2 are the same, the shortfall in the film feed amount, which is the portion indicated by the diagonal line B' in FIG. This will be compensated in proportion to the excess 9 parts of the film shown by the diagonal line B. That is, the rotations of the first servo motor SM and the second servo motor SM are controlled so that the film feed amount and the rotation amount of the lateral sealer 37 are guaranteed by such a timing table.

In this embodiment, a packet conveyor is used as the feeding device, but as described above, a volume cup type computer scale or the like may be used as the feeding device as needed.

Further, although the film feeding rollers 14, 14 are driven by a general-purpose motor M controlled by an inverter 22, the driving of the film feeding rollers 14, 14 may be controlled by a servo motor, or the feeding rollers 14, 14 may be driven by a film feeding roller. It may be mechanically linked with a film feeding mechanism 30 consisting of 25, 26 and a feeding belt 28 with a required speed difference, and may be driven and controlled by a first servo motor SM□.

As described in detail of the invention, according to the control method and apparatus for a vertical form-fill-fill-seal packaging machine according to the present invention, when the drive system of the packaging machine starts to decelerate toward a stop due to a delay in the supply of products, Further, if the supply of the product is detected during the deceleration, the speed of the packaging machine is immediately increased from the deceleration state. Therefore, it is possible to deal with the packaging of the product that is supplied late, and there is no need to temporarily stop the driving of the packaging machine, compared to the conventional vertical bag-form-fill-package machine.

Absolute packaging capacity is improved, and at the same time, there are advantages that greatly contribute to improved productivity.

[Brief explanation of the drawing]

Fig. 1 is a schematic configuration diagram of a vertical form-fill-seal packaging machine according to an embodiment for suitably achieving the control method for a vertical form-fill-seal packaging machine according to the present invention, and Fig. 2 is a diagram showing an embodiment of the vertical form-fill-seal packaging machine. Control block diagram of the vertical bag-forming-filling-sealing machine related to the above, Fig. 3, Fig. 4, Fig. 5,
Figures 6, 7, and 8 are graphs showing the relationship between the mechanical capacity of the packaging machine and the time opening, and Figures 9 (a) to (c) are
FIG. 2 is a schematic explanatory diagram showing the positional relationship between a dancer roller and a sensor that detects its raised position and lowered position. 10... Original fabric roll 12... Film 20...
・Bag making machine 30...Film feeding mechanism 34...
・Product 38...Horizontal seal mechanism 58...Pulse generating means S5...Product detection sensor M...Variable speed control motor SM□...First servo motor 8M2...Second servo motor F I 3.3 FIG, 5 FIG, 4

Claims (1)

[Scope of Claims] [1] A film fed from a roll is formed into a cylindrical shape using a bag making machine, and the cylindrical film is continuously fed downward by a film feeding mechanism driven by a servo motor. At the same time, a vertical seal is applied to the overlapping edge in the longitudinal direction of the cylindrical film, and a product detection means detects the falling supply of the product to the cylindrical film, and the vertical position of the cylindrical film sandwiching the product is horizontally sealed. In a vertical form-fill-fill-seal machine that performs horizontal sealing and cutting using a sealing mechanism, an operation reference signal for the packaging machine is generated after a required period of time has elapsed from the time when the product is detected by the product detection means, and upon receiving this operation reference signal, the Increase the speed of the servo motor that drives the film feeding mechanism until it reaches a predetermined speed, and if the operation reference signal regarding the next product supply is not input by the end of the machine cycle of the packaging machine, drive the film feeding mechanism. If the servo motor starts decelerating, and the operation reference signal is input while the servo motor is decelerating, the timing table of the deceleration region from the time when the servo motor starts decelerating to the time when the operation reference signal is generated. A method for controlling a vertical bag-forming-filling-sealing machine, comprising increasing the speed of the servo motor until it reaches a predetermined speed. [2] The horizontal sealing mechanism is driven by a servo motor separate from the servo motor for driving the film feeding mechanism, and is controlled to rotate at an inconstant speed corresponding to the amount of film feeding for one bag required for packaging. 2. The control method for a vertical bag-forming-fill-sealing machine according to claim 1, wherein a timing table is created in which increase/deceleration control synchronized with the film feeding mechanism is synthesized. [3] A first servo motor (note: "sealer") that drives a film feeding mechanism that forms the film unwound from the original roll into a cylindrical shape using a bag making machine and feeds the cylindrical film downward.
a second servo motor that drives a horizontal sealing mechanism that applies horizontal seals before and after sandwiching the product to a cylindrical film whose longitudinal edges are vertically sealed; pulse generating means for generating a reference signal for synchronously operating two servo motors; a product detecting means for detecting the falling supply of a product onto the cylindrical film; a first timer that generates an operation reference signal for a machine cycle in the packaging machine after a predetermined period of time has elapsed from the generation of the detection signal; and a time from the generation of the product detection signal to the engagement of the horizontal sealer in the horizontal sealing mechanism. a second timer that is set for the first timer, various data necessary for packaging in the packaging machine, data regarding the increase/deceleration values of the first servo motor and the second servo motor, and data for inputting values regarding the first timer. a setting means, and based on the value set and input by the data setting means,
1. A control device for a vertical bag-form-fill-seal packaging machine, comprising a control means for controlling the operation of the packaging machine by creating a timing table regarding the speed and position of a first servo motor and a second servo motor. [4] The film is fed out from the original roll by a film feeding roller connected to a drive motor, and the drive motor is proportionally controlled in synchronization with a first servo motor that drives the film feeding mechanism; The present invention further comprises a control circuit for speeding up or temporarily stopping the drive motor according to the current position of a dancer roller disposed in a film feeding process between the film feeding roller and the bag making machine. 3. A control device for a vertical bag-form-fill-seal packaging machine according to item 3.