JPH10119910A - Film transfer device for horizontal bag-making, filling machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To always transfer a band-shaped film at a constant speed by a method wherein the film pulling out speed is controlled by monitoring a variation of a tension which is imparted to the band-shaped film pulled out from a film stock roll. SOLUTION: A film loading means 22 in which a film stock roll 28 is loaded, is driven by a fourth motor M4 which is controlled into various speeds accompanying the decrease of the winding diameter of the roll 28. On a film transfer path from the film loading means 22 to a bag making apparatus 32, a dancer roller 44 which imparts a tension to a band-shaped film 26, is arranged. For the dancer roller 44, a variation position is detected by a detection signal of a potentiometer 52. On a film transfer path from the dancer roller 44 to the bag-making apparatus 32, a roller 80 which is equipped with an encoder E3 and rotates while being in contact with the band-shaped film 26, is arranged. Transmitted pulse numbers from the encoder E3 are counted by a control means 20, and a transfer amount of the band-shaped film 26 is detected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film transfer device for a horizontal bag making and filling machine, and more particularly, to a polymerization end of a film formed by drawing a belt-like film from a raw film roll and forming it in a bag making machine. The present invention relates to a film transfer device of a horizontal bag-making and filling machine which transfers an article toward a downstream side while sandwiching an edge.

[0002]

2. Description of the Related Art A strip-shaped film drawn from a film roll is passed through a bag making machine to form a tube, articles are sequentially supplied into the obtained tube-like film, and the article is sealed in a tube. A so-called pillow package in which a longitudinal seal (longitudinal seal) is applied to the overlapping surface of the longitudinal edge of the film, and a lateral seal (horizontal seal) and cutting are applied before and after sandwiching the article of the tubular film, respectively. There is widely known a horizontal bag-making and filling machine for continuously producing a bag. As a film transfer device of this horizontal bag making and filling machine, for example, JP-A-7-237796
Is disclosed in Japanese Patent Application Laid-Open Publication No. H10-26095. This device is provided with a drive motor capable of controlling acceleration / deceleration for rotating a raw film obtained by winding a strip film at a required diameter, and a rotation sensor for detecting a rotation amount of the raw film. In, the amount of rotation of the raw film detected by the rotation sensor and the current theoretical winding diameter obtained from the winding diameter of the raw film and the thickness of the film previously input data is determined, and based on the winding diameter, The speed of the drive motor for rotating the raw film is controlled so that the transfer speed of the belt-shaped film becomes a target value. Prior to the operation of the bag making and filling machine, the winding diameter of the raw film and the thickness of the film are input by an input device such as a keyboard and a touch panel, and based on the input initial data, the bag making and filling machine is operated. At start-up, the belt-like film is controlled at a predetermined speed.

[0003]

In the above-described film transfer apparatus, the theoretical winding diameter reduced from the rotation amount of the original film based on the original film winding diameter and the film thickness inputted as the initial data. , And the rotational drive speed of the raw film is calculated and controlled so as to achieve the target film transfer speed. In this case, the thickness of the packaging film used in the horizontal bag making and filling machine is generally several tens of microns except for special cases, and the same film in the wound state of the raw film is used. Actually, even if the winding amount is the same, the winding diameter is not always the same outer diameter with high accuracy. Further, depending on the state of film storage, film material, and the like, the outer diameter of the raw film is not uniform in the circumferential direction. For this reason, it is relatively difficult to calculate the actual winding diameter of the original film based on the thickness of the film.

If the input initial data is not an accurate value, the rotational driving speed of the raw film, which is calculated based on the initial data, may be different from the target film transport speed. As a result of being set and controlled, there arises a problem that accurate film transfer control corresponding to a target film cut pitch and the number of packages per unit time cannot be performed. Further, it is pointed out that the tension applied to the band-shaped film also fluctuates, and the band-shaped film supplied to the bag-making device is slackened, meandering, or the like, and good tubular molding cannot be performed.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems inherent in the prior art, and has been proposed to solve the problem suitably. Even, controlling the film withdrawing speed from the film raw roll to achieve the target film transport speed,
Also, to provide a film transfer device of a horizontal bag making and filling machine capable of applying an arbitrary tension to a belt-like film drawn from a raw film roll, monitoring the fluctuation of the tension, and constantly transporting the belt-like film at a constant speed. With the goal.

[0006]

SUMMARY OF THE INVENTION In order to overcome the above-mentioned problems and appropriately attain the intended purpose, the present invention provides a bag making device for forming a strip-shaped film drawn from a film roll into a cylindrical shape, A supply conveyor that supplies articles at predetermined intervals toward a cylindrically formed film, and a film that is transported toward the downstream side by rotating and holding a longitudinally overlapping end portion of the cylindrical film. Horizontal bag making and filling comprising a transport means, a vertical sealer for applying a vertical seal to the overlapping edge of the cylindrical film, and a horizontal sealing mechanism for performing horizontal sealing and cutting before and after sandwiching the article of the cylindrical film. A first motor for driving the supply conveyor, a second motor for driving the horizontal sealing mechanism, and a third motor for rotating the film transfer means at a speed corresponding to a predetermined film transfer speed.
A motor, control means for synchronously controlling each of the first motor, the second motor, and the third motor; and rotation control at a speed dependent on the rotation of the third motor, wherein the film roll is loaded and held. A fourth motor for driving film loading means, and a dancer roller set to apply a predetermined tension to the band-shaped film from the film roll to the bag making machine, and to be able to change the tension to the band-shaped film depending on its position. A rotation amount detection unit capable of detecting the rotation amount of the fourth motor or the rotation amount of the film loading unit with respect to the rotation of the film raw roll, and a film provided in a film transfer path from the dancer roller to the bag making device. Transfer amount detecting means, the control means is configured to detect the film transfer amount detecting means, the film cut pitch data input Comparing the corresponding data with each other, and when the values are different, setting a transfer amount correcting means for controlling the speed change of the third motor, and setting a target position of a dancer roller for setting a tension on the strip film; Dancer roller fluctuation control means for outputting a shift control signal of a fourth motor based on the rotation speed of the third motor in accordance with a change from a position, and rotation from rotation amount detection means for each predetermined rotation of the film transport means A reference speed setting means for detecting an amount of the film and outputting a reference rotation speed signal of a fourth motor according to a winding diameter of the film roll; and an output signal of the dancer roller fluctuation control means and an output signal of the reference speed setting means. Film speed control means for controlling the speed of the fourth motor.

Another object of the present invention is to overcome the above-mentioned problems and to appropriately achieve the intended object by providing a bag-making device for forming a belt-like film drawn from a film roll into a tubular shape, Conveyor for supplying articles at predetermined intervals toward a film formed into a film, and a film transport means for transporting the film toward the downstream side by rotating and holding the overlapping edge portion in the longitudinal direction of the cylindrical film. And, in a horizontal bag making and filling machine consisting of a vertical sealer for applying a vertical seal to the overlapping edge of the cylindrical film, and a horizontal sealing mechanism for performing horizontal sealing and cutting before and after sandwiching the article of the cylindrical film. A first motor for driving the supply conveyor, a second motor for driving the horizontal sealing mechanism, a third motor for rotating the film transfer means at a speed corresponding to a predetermined film transfer speed, Mo And a control means for controlling the synchronous driving of each of the motor, the second motor and the third motor, and a film loading means for controlling the rotation at a speed dependent on the rotation of the third motor to load and hold the film roll. Fourth
A motor, a dancer roller configured to apply a predetermined tension to the band-shaped film from the film raw roll to the bag making device, and to be capable of changing the tension to the band-shaped film depending on its position, and a rotation of the film raw roll. , The fourth
A rotation amount detection unit capable of detecting a rotation amount of a motor or a rotation amount of a film loading unit; and a registration mark detection sensor provided on a film transfer path from the dancer roller to the bag making device, wherein the control unit includes The detection timing of the registration mark attached to the belt-like film by the registration mark detection sensor is compared with the target registration mark detection timing corresponding to the film cut pitch input with the data. Transfer amount correcting means for controlling the speed of the belt-like film, and setting a target position of the dancer roller for setting a tension on the strip film, and using the rotation speed of the third motor as a reference in accordance with a change from the target position of the dancer roller. Dancer roller variation control means for outputting a shift control signal for the fourth motor; and rotation at predetermined rotations of the film transfer means. Reference speed setting means for detecting a rotation amount from the detection means and outputting a reference rotation speed signal of a fourth motor corresponding to the winding diameter of the film roll, output signal and reference speed setting of the dancer roller fluctuation control means Film speed control means for controlling the speed of the fourth motor by an output signal of the means.

[0008]

When a third motor for rotating a film feed roller for holding a longitudinally overlapping edge portion of a cylindrically formed film in a bag making machine is driven at a speed corresponding to a predetermined film transfer speed. The tubular film is transported to the downstream side while being held between the film feed rollers. Further, a fourth motor for driving the film loading means loaded with the film roll is driven at a speed dependent on the third motor, and the strip film is drawn from the film roll. A change from the target position of the dancer roller around which the belt-like film drawn from the film roll is wound is detected, and the detected value is used to determine the fourth speed based on the rotation speed of the third motor.
The speed of the motor is controlled. As a result, the dancer roller is held at the target position, and the film is transported at a constant speed without changing the tension applied to the belt-like film. Further, the rotation amount from the rotation amount detecting means is detected at each predetermined rotation of the film feed roller, and the winding diameter of the film roll is calculated based on the film transfer amount obtained from the rotation amount. Then, the reference rotation speed of the fourth motor according to the current winding diameter of the film roll is set, and the shift control of the fourth motor with high accuracy is performed. Furthermore, it corresponds to the detection result of the film transfer amount detecting means or the detection timing of the registration mark attached to the belt-like film by the registration mark detection sensor, and the data corresponding to the data input film cut pitch or the data input film cut pitch. The belt-like film is always pulled out from the film roll by a regular length by comparing the target registration mark detection timing with the target, and controlling the speed of the third motor when the value is different.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a preferred embodiment of a film transfer device of a horizontal bag making and filling machine according to the present invention will be described.
This will be described below with reference to the accompanying drawings. The horizontal bag making and filling machine 10 shown in FIG.
A supply conveyor 18 is provided for feeding a tubular film 26a (described later) at regular intervals by a large number of attachments 16 attached to the endless chain 14 at predetermined intervals. The supply conveyor 18 uses a first motor M1 as a drive source, and the motor M1 is controlled by the control means 20 so that the supply conveyor 18 runs at a speed corresponding to the number of packages per predetermined time.

Above the supply conveyor 18, a film loading means 22 is rotatably disposed.
A film roll 28 in which a band-shaped film 26 is wound around a paper tube 24 at a required diameter is loaded and held via the paper tube 24 so as to be integrally rotatable. This film loading means 2
2 is driven by a fourth motor M4 whose rotation is controlled at a speed dependent on the rotation of a third motor M3 for transporting a film, which will be described later, and forcibly turns the film roll 28 loaded and held by the film loading means 22. The speed change control is performed such that the film is rotated at a high speed as the winding diameter of the film roll 28 decreases so that the belt-like film 26 is pulled out at a constant speed. Further, the fourth motor M4 includes an encoder E1 as a rotation amount detecting means, and a signal of the encoder E1 is supplied to the control means 20. Note that a servo motor is preferably used as the fourth motor M4, and the fourth motor M4 is configured to be rotatable forward and backward.

A strip film 26 drawn from a film roll 28 loaded and held in the film loading means 22 is fed to a bag making machine 32 disposed downstream of the supply conveyor 18 via a plurality of guide rollers 30. , And passed through the bag-making device 32 to form a cylindrical film 26
a is such that a required feed is given by rotating the rollers 34, 34 while pressing the pair of film feed rollers 34, 34 (only one of which is shown) opposing the overlapping edge in the longitudinal direction. Be composed. On the downstream side of the film feed roller 34 as the film transport means, the cylindrical film 2
Vertical seal rollers 3 opposed to each other with the overlapping edge portion 6a interposed therebetween
A vertical sealer 38 made up of 6, 36 (only one is shown) and the like is provided, and the sealer 38 applies a vertical seal to the overlapping edge of the tubular film 26a. The film feed roller 34 and the vertical seal roller 36 are rotationally driven by a third motor M3 such as a servomotor, and the third motor M3 corresponds to a film transfer speed obtained from a packaging speed per a predetermined time and a film cut pitch. Is driven at the specified speed. Further, the third motor M3 includes an encoder E2, and a signal of the encoder E2 is supplied to the control unit 20. The film transport means includes a pair of film feed rollers 34, 34.
Alternatively, a pair of film feed belts may be employed.

Downstream of the vertical sealer 38, a horizontal sealing mechanism 40 for horizontally sealing and cutting the tubular film 26a is provided. The horizontal seal mechanism 40 includes a pair of horizontal sealers 42, 42 that rotate at irregular speeds by a second motor M2 such as a servomotor, which is vertically opposed to the cylindrical film 26a. Then, while the horizontal sealers 42, 42 make one rotation synchronously, the cylindrical film 26a is transported by one cut pitch, so that the horizontal sealing and cutting are performed before and after the article 12 of the cylindrical film 26a is sandwiched. It is configured to be.

From the film loading means 22 to the bag making device 32
The transfer path of the band-shaped film 26 leading to
6 is provided with a dancer roller 44 for giving a predetermined tension. As shown in FIG. 2, the dancer roller 44 is rotatably supported by an end of a swing arm 46 that is swingably disposed, and extends between the arm 46 and an appropriate fixed portion. The tension spring 48 is configured to be constantly biased in a direction (left side in FIG. 2) in which a required tension can be applied to the belt-shaped film 26 wound around the dancer roller 44. Further, for example, a potentiometer 52 is provided on the support shaft 50 that rotates integrally with the swing arm 46, and a change position of the dancer roller 44 can be detected by a detection signal from the potentiometer 52. Then, a change from the preset [target position] T ₀ (see FIG. 2) of the dancer roller 44 is detected by the potentiometer 52 and input to the control means 20. In addition, stoppers 54 and 54 are provided at positions separated from each other left and right with the swing arm 46 interposed therebetween.
The swing range of the swing arm 46 is defined by 54.

As shown in FIG. 1, a roller 80 rotating in contact with the belt-like film 26 is provided in a film transfer path from the dancer roller 44 to the bag making machine 32. An encoder E3 as detection means is provided. This encoder E3
Is connected to the control means 20, and counts the number of pulses transmitted from the encoder E3 to thereby control the band film 26.
It is configured to detect the transfer amount of. Note that the detection of the film transfer amount by the encoder E3 is used in the case of the strip film 26 having no registration mark.

The control means 20 shown in FIG. 1 basically includes a film speed control means 60 having a reference speed setting means 56 and a dancer roller fluctuation control means 58, an automatic roll diameter setting means 62, and a transfer amount correcting means 82. Are prepared.
Further, the bag making and filling machine 10 is provided with an input means 64 comprising an operation panel and the like, and a packaging condition such as a packaging speed and a film cut pitch is inputted to the control means 20 by a keyboard or a touch panel provided thereto. Has become. The control means 20 controls the first motor M1 and the second motor M2 based on the data input through the input means 64.
The motor M2 and the third motor M3 are each configured to perform synchronous drive control. Further, the input means 64 relates to the position of the dancer roller 44 so as to apply a desired tension to the belt-like film 26 transferred to the bag-making device 32 and to set the target of the dancer roller 44 according to the properties such as the thickness and material of the film. Position] T ₀ can be input to the control means 20 as an arbitrary value.

Prior to the start of the bag making and filling machine 10, the roll winding diameter automatic setting means 62 is provided with the film loading means 22.
Calculates the winding diameter of the raw film roll 28 loaded in the bag and functions to determine the speed of the fourth motor M4 when the bag making and filling machine 10 is started. That is, the bag making and filling machine 1
An operation start signal such as a start push button switch of 0
When input to 0, at setting the mechanisms of bag-making filling machine 10 the filmstrip 26 drawn out from the film raw fabric roll 28, is applied to the [target position] T ₀ from the right (filmstrip 26 that tension is previously set to the increase side) of the [film winding diameter measuring start position] T _1, to confirm the relationship between [the current position] T ₂ of the dancer roller 44 obtained by the signal input from the potentiometer 52, the 4th
It is determined whether the motor M4 is rotated in the film unwinding direction (forward rotation direction) or in the film rewind direction (reverse rotation direction) and then rotated in the film unwinding direction, and the fourth motor M4 is rotated at a low speed. Is set to For example, the dancer roller 44 is [present position] T _2, as shown in FIG. 3, the tension the tension of [the film winding diameter measurement start position] T ₁ the tension spring 48 is pulled from the right side to the belt-like film 26 is increased when positioned to the increase side moves the dancer roller 44 to [target position] T ₀ is rotated in the film unwinding direction the fourth motor M4 at a low speed. The dancer rollers 44 [current location] T _2, as shown in FIG. 4 (a), decrease the tension of the film web 26 shrinks the tension spring 48 in the left side of the [film winding diameter measurement start position] T ₁ When it is positioned on the tension decreasing side, the fourth
The dancer roller 44 is rotated in the film rewinding direction by the low-speed drive of the motor M4 to set the dancer roller 44 to [film winding diameter measurement start position].
After temporarily it moved to the tension increase side than T ₁ (see FIG. 4 (b))
To, and is set to move the dancer roller 44 a fourth motor M4 to rotate the film drawing direction [target position] T _0. Incidentally, the [film winding diameter measurement start position] T _1, based on the [target position] T ₀ which is the data input by the input means 64, so that a predetermined value which is pre-programmed input is set is added ing.

After the dancer roller 44 is moved to the [target position] T ₀ by the detection signal of the potentiometer 52, the fourth motor M 4 is stopped, and the roller 44 is moved from the [film winding diameter measurement start position] T _1. [Target position] A signal relating to the amount of movement detected by the potentiometer 52 when moving to T ₀ , and a signal relating to the amount of rotation of the fourth motor M4 from the encoder E1 when the dancer roller 44 moves to [Target position] T _0. Is calculated so as to determine the speed of the fourth motor M4 when the bag making and filling machine 10 is started. Note that when the control operation out this winding diameter detection, by performing the control to move toward the dancer roller 44 from [the film winding diameter measurement start position] T ₁ than the tension increase side located [target position] T _0, the detection accuracy It can be enhanced.

During the continuous operation of the bag making and filling machine 10, the film speed control means 60 controls the dancer roller 44.
Is held at the [target position] T ₀ , and the speed of the fourth motor M4 is controlled so as to transfer the film 26 at a constant speed without changing the tension applied to the belt-like film 26. Dancer rollers variation control means 58 in the film speed control means 60, from [target position] T ₀ of the dancer roller 44 with decreasing winding diameter of the potentiometer 52 are detected by the original film roll 28 to the [current location] T ₂ in response to a signal change, giving the shift control signal to the fourth motor M4 in accordance with the fluctuation amount, functions to returning the dancer roller 44 is always in [target position] T _0. That is, the dancer roller 44 is moved to the target position.
When the tension changes from T ₀ to the tension increasing side, the fourth motor M4
To the dancer roller 44 [target position].
Control is performed so as to hold the _value at T ₀ . Further, even if the dancer roller 44 varies to [target position] T ₀ from the tension decreasing side, by applying a deceleration signal to fourth motor M4, the dancer roller 44 is held in the [target position] T _0. Thus, the speed of the fourth motor M4 is controlled such that the strip film 26 drawn from the film roll 28 is transferred at a slightly lower speed than the transfer speed of the cylindrical film 26a transferred by the third motor M3. And bag making equipment 3
2 is transferred in a state where a constant tension is applied. The dancer roller fluctuation control means 58
Is controlled by the dancer roller 44.
Is performed by PID control in which proportional, differential, and integral are combined in order to cope with large fluctuations and rapid fluctuations of the fourth motor M even if such a situation occurs.
4 is configured to shift smoothly.

The reference speed setting means 56 in the film speed control means 60 is provided at every predetermined rotation of the film feed roller 34 (1/1 / the film feed roller 34 in the embodiment).
The number of pulses transmitted from the encoder E1 attached to the fourth motor M4 is counted for each number of pulses transmitted from the encoder E2 corresponding to two rotations), and the fourth motor M
Based on the amount of film transfer obtained from the amount of rotation of No. 4, the winding diameter of the film roll 28 is calculated, and functions to perform control for determining the reference rotation speed of the fourth motor M4.

Further, the transfer amount correcting means 82 provided in the control means 20 includes a detection result on the film transfer amount by the encoder E3 and data on a target film transfer amount corresponding to a film cut pitch inputted in advance. And if the values are different, the third motor M3 functions to control the speed change so that the belt-like film 26 is fed by a regular length.

The control means 20 is set so as to detect the end of the belt-like film 26 drawn from the raw film roll 28 from the fluctuation amount of the dancer roller 44 detected by the potentiometer 52. That is, as shown in FIG. 2, left and right [oscillation upper and lower limit positions] T ₃ and T ₄ are set at positions on both the left and right sides of the [target position] T ₀ of the dancer roller 44 and close to the stoppers 54 and 54. When the potentiometer 52 detects that the dancer roller 44 has fluctuated to one of the [oscillation upper and lower limit positions] T ₃ and T ₄ , the control means 20 is configured to detect the end of the strip film 26. . For example, when the end of the belt-shaped film 26 is separated from the paper tube 24 of the film roll 28, the tension applied to the belt-shaped film 26 by the dancer roller 44 is released. It is because the dancer roll 44 swings to the left fluctuates up [swing limit position] T _3, the film end detection signal is output at this time. Bag making and filling machine 1
The belt-like film 26 of the raw film roll 28 used for the tape 0 is fixed to the paper tube 24 with an adhesive tape or the like, so that when the belt-like film 26 is used up, it will be pulled out. The peeling resistance of the tape fixing portion may be applied to the belt-shaped film 26, and at this time, the swing arm 46 swings rightward and the dancer roller 44
There film end detection signal even if the varied from [swinging upper limit position] T ₄ is output.

Further, the detection value of the potentiometer 52 and the clock pulse value transmitted from the control means 20 are set so as to output a film end detection signal even when the dancer roller 44 suddenly fluctuates per predetermined time. ing. Thus, when the terminal end of the band-shaped film 26 is separated from the paper tube 24, this state can be detected early and reliably.

[0023]

Next, the operation of the film transfer device of the horizontal bag making and filling machine according to the embodiment will be described. Prior to the start of the bag making and filling machine 10, a belt-like film 26 without a registration mark drawn out from the film roll 28 loaded in the film loading means 22 is set in each mechanism, and is fed to the film feeder. It is assumed that the transfer can be performed by the rollers 34 and that the synchronous set operation for the initial synchronous alignment between the supply conveyor 18 of the bag making and filling machine 10 and the horizontal sealing mechanism 40 is performed. In this state, when an operation start signal such as a start push button switch of the bag making and filling machine 10 is inputted to the control means 20, the winding diameter for detecting the winding diameter of the film roll 28 loaded on the film loading means 22 is detected. The detection control operation is automatically performed. Incidentally, the [target position] T _{0 of the} dancer roller 44 corresponding to the tension applied to the belt-shaped film 26 is input to the control means 20 as data, so that the [film] on the tension increasing side from the [target position] T ₀ is increased. Reel diameter measurement start position] T ₁ is previously set automatically (see Fig. 2).

That is, the [current position] T ₂ of the dancer roller 44 is determined by a signal input from the potentiometer 52.
It has been made in detection, by the set tension state of the filmstrip 26, as shown in FIG. 3, the tension increased filmstrip 26 F than the dancer roller 44 is [present position] T ₂ [film winding diameter measurement start position] T ₁ Side, rotate the fourth motor M4 in the film unwinding direction at a low speed.
The belt-like film 26 is pulled out from the film roll 28 loaded in the film loading means 22 by performing the forward rotation. As a result, the swing arm 46 pulled by the tension spring 48 swings to the side where the tension on the belt-shaped film 26 is reduced, and the dancer roller 44 moves toward [target position] T ₀ . The dancer rollers 44 [current location] T _2, as shown in FIG. 4 (a), [the film winding diameter measurement start position] T ₁
In the case where the belt is located on the side where the tension of the belt-like film 26 is reduced, the fourth motor M4 is rotated in the film rewinding direction at a low speed (reverse rotation), and the belt-like film 2
Rewind 6. Thus, the swing arm 46 against the elastic force of the tension spring 48 swings the tension increase side, the dancer roller 44 is moved toward the [film winding diameter measurement start position] T _1. The [current location] T ₂ of the dancer roller 44 is detected by the roller fluctuation detecting means 52, as shown in FIG. 4 (b), [the film winding diameter measurement start position] T ₁ of a strip-shaped film 26 tension increase side F Move to the fourth motor M4
There dancer roller 44 in the same manner as described above is rotated (normal rotation) in the film unwinding direction at a low speed to move toward the [target position] T _0.

[0025] In post-rotation in the film drawing direction of the fourth motor M4 (forward), confirms that the dancer roller 44 is moved to the [target position] T ₀ by detecting the potentiometer 52, the fourth motor M4 is stopped Is done.
The rotation of the fourth motor M4 in moving from dancer roller 44 is [the film winding diameter measurement start position] T ₁ until [target position] T ₀ is read in the number of pulses from the encoder E1, the amount of rotation from the amount of movement to the [target position] T ₀ from [the film winding diameter measurement start position] T ₁ of the dancer roller 44, the film feeding amount of filmstrip 26 drawn from a film master roll 28 is obtained. The current winding diameter of the film roll 28 is calculated from the film transfer amount and stored in a storage unit (not shown) of the control means 20. The speed at the start of operation of the fourth motor M4 corresponding to the transfer speed is calculated.

The first motor M1 and the second motor M2
When the synchronous operation of the third motor M3 is started, the control unit performs a plurality of controls described below with reference to FIGS. 5 to 7 in parallel. First, a description will be given based on the control flowchart of FIG. Reads the current speed of the third motor M3, which is rotationally driven with the start of the continuous operation of the bag making and filling machine 10, by receiving an input pulse from the encoder E2.
(S1) The reference speed of the fourth motor M4 is determined based on the winding diameter of the film roll 28 obtained by the winding diameter detection control operation, and the reference speed is determined at a speed dependent on the speed of the third motor M3. The four motor M4 is rotated (S2). Further, as the operation of the bag making and filling machine 10 is continued, the reference rotation speed of the fourth motor M4 is changed in accordance with the value of the obtained winding diameter of the film raw roll 28 which changes in the arithmetic control of the winding diameter described later. Is set, and the rotation of the fourth motor M4 is controlled in the same manner as described above. As for the rotation speed of the third motor M3, the detection result of the film transport amount by the encoder E3 is compared with the data corresponding to the previously input film cut pitch, and the band film 26 is compared.
Is controlled so that is always transmitted by a regular length.
That is, the speed of the fourth motor M4 is controlled so as to hold the dancer roller 44 at the [target position] T ₀ .
Strip film 2 pulled out from film roll 28
6 is transferred toward the bag-making machine 32 at a lower speed than the cylindrical film 26a transferred by the film feed roller 34 driven by the third motor M3 and with a constant tension applied.

Next, control for maintaining the dancer roller 44 at the [target position] T ₀ will be described with reference to the control flowchart of FIG. Wherein the signal input from the potentiometer 52 detects a [current location] T ₂ of the dancer roll 44 (S3), then the dancer roller 44
In comparison [current location] T ₂ and the [target position] T _0, by which it is confirmed that the dancer roller 44 is varied from [target position] T ₀ (S4), [target dancer rollers 44 position] reads the variation from T ₀ [to the current position] T ₂ (S5), the shift control signal is applied to the fourth motor M4 in accordance with the fluctuation amount (S6). And dancer roller 4
4 is confirmed to have returned to the [target position] T ₀ by the signal input from the potentiometer 52 (S7).
The output of the shift control signal to the fourth motor M4 is stopped.
(S8), in response to variations in the [target position] T ₀ following the dancer roller 44, control is performed to each of these steps is repeated.

Next, control for calculating the winding diameter of the film roll 28 will be described with reference to the control flowchart of FIG. The rotation amount of the encoder E2 attached to the third motor M3, which is rotationally driven by the continuous operation, is constantly monitored (S9), and the pulse count reaches the 1/2 rotation of the film feed roller 34 obtained by the encoder E2. (S10), the feed roller 34
The rotation amount of the fourth motor M4 during the half rotation is read from the encoder E1 (S11), and the transfer amount of the strip film 26 is obtained from the pulse count amount output from the encoder E1 (S12). Next, the current winding diameter of the film roll 28 is calculated from the film transfer amount, and the calculated value is stored in the storage unit (S13). Thus, the reference speed of the fourth motor M4 is determined based on the obtained winding diameter, and the fourth motor M4 is rotated at a speed dependent on the speed of the third motor M3 by the above-described control.

By performing the above-described plural controls in parallel, the belt-like film 26 having a regular length is fed from the film roll 28 at a constant speed with a constant tension applied thereto. It is transferred to. This allows
The belt-like film 26 is formed into a good tubular shape by the bag-making device 32,
On the downstream side, the obtained cylindrical film 26a is subjected to a vertical seal by a vertical sealer 38 and a horizontal seal
Cutting is suitably performed.

When the strip film 26 drawn from the film roll 28 is used up and the end of the film is separated from the paper tube 24, the swing arm 46 swings by the elastic force of a tension spring 48. and, the dancer roller 44 varies to [swing limit position] T ₃ (see FIG. 2). When this is detected by the potentiometer 52,
The control means 20 outputs a film end detection signal. Further, as described above, the peeling resistance of the tape fixing portion when the film end portion separates from the paper tube 24 is reduced by the dancer roller 4.
4, the swing arm 46 is connected to the tension spring 4.
Swung against the 8 elasticity dancer roller 44 varies to T ₄ [swinging upper limit position]. This is potentiometer 5
When 2 is detected, the control means 20 outputs a film end detection signal. Accordingly, it is possible to prevent excessive tension from being applied to the belt-like film 26 by the force acting in the direction opposite to the film pulling direction when the film end portion is peeled off. The belt-like film 26 is not separated from the paper tube 24.
Can be prevented from being torn off when the film 26 is wound in the reverse direction.

A film end detection signal is also output when it is determined that the dancer roller 44 has fluctuated rapidly within a predetermined time period based on the detection value of the potentiometer 52 and the clock pulse value transmitted from the control means 20. You. When the film end detection signal is output in this way, the bag making and filling machine 10 is stopped, and
It is possible to make the worker surely recognize the end of the film by an alarm or a lamp.

That is, in the film transfer apparatus of the embodiment, the fluctuation amount (fluctuation in tension) of the dancer roller 44 is constantly monitored during the continuous operation of the bag making and filling machine 10, and the fourth motor M4 changes the speed in accordance with the fluctuation amount. Controlled, the roller 44
Is held at the [target position] T ₀ , the belt-like film 26 pulled out from the film roll 28 is transferred to the bag-making machine 32 with a constant tension applied. Further, the reference rotation speed of the fourth motor M4 is calculated from the winding diameter of the film roll 28 obtained at each predetermined rotation of the film feed roller 34, and the speed depends on the speed of the third motor M3 based on the obtained speed. Since the fourth motor M4 is rotationally driven and controlled at the speed, the belt-like film 26 can always be transferred based on an accurate value. Prior to the operation of the bag making and filling machine 10, the fourth motor M4 of the film loading means 22 is rotated at a low speed and the amount of movement of the dancer roller 44 is detected to automatically obtain the winding diameter of the film roll 28. Thus, the complicated operation of measuring the winding diameter of the film roll 28 each time it is replaced and manually inputting the data can be omitted.

Here, the execution time of the winding diameter detection control operation is, for example, as described above, for example, the plain band-shaped film 2.
In the case where a material without a registration mark such as 6 is used, the film is transferred between the article supply position by the supply conveyor 18 and the rotation operation position of the horizontal sealing mechanism 40 when the bag making and filling machine 10 is driven. Since the positioning of the film transfer position by the apparatus is unnecessary, the operation after the first conveyor M1 and the second motor M2 are rotated by the synchronous set operation to perform the alignment between the supply conveyor 18 and the horizontal sealing mechanism 40 is performed. By issuing an operation start signal by operating the start push button switch or the like of the bag making and filling machine 10 from the standby state, the continuous operation of the bag making and filling machine 10 is automatically started after the winding diameter detection control operation is executed. It is supposed to be.

When the belt-shaped film 26 with the registration mark is used, the above-described winding diameter detection control operation is performed by operating a start push button switch or the like, and then the bag making and filling machine is operated. The first in each of the ten operating mechanisms
The control is automatically performed to automatically shift to the synchronous set operation of the motor M1, the second motor M2, and the third motor M3. When the set operation is completed, the bag making and filling machine 10 stops and enters the operation standby state. From the operation standby state after the completion of the set operation, the winding diameter detection control operation is performed again by operating the start push button switch of the bag making and filling machine 10, and then the operation of the bag making and filling machine 10 is started. However, if an operation start signal is input by operating a start push button switch or the like of the bag making and filling machine 10 within a predetermined period of time after the completion of the set operation, the winding diameter detection control operation is executed. Is controlled so that the continuous operation of the bag making and filling machine 10 is started.

[0035]

[Other Embodiments] In the above-described embodiment, the signal for controlling the speed change of the third motor M3 is transmitted to the encoder E3 using the belt-like film 26 having no registration mark.
However, when the belt-like film 26 with the registration mark is used, it can be implemented by adopting the configuration shown in FIG. That is, a registration mark detection sensor 84 for detecting a registration mark attached to the belt-like film 26 is provided on a film transport path from the dancer roller 44 to the bag making device 32, and a detection signal from the sensor 84 is transmitted to the control unit 20. Is set so as to be input to the transfer amount correcting means 82. Then, the transfer amount correcting means 82 compares the detection timing of the registration mark of the belt-shaped film 26 by the registration mark detection sensor 84 with the target registration mark detection timing corresponding to the film cut pitch inputted in advance. Are set so that the speed of the third motor M3 is controlled when the speeds are different. As a result, the strip film 26 is always accurately transferred by a regular length corresponding to the film cut pitch.

[0036] As the means for detecting the variation amount of the dancer roller 44 from [the film winding diameter measurement start position] T ₁ until [target position] T _0, not limited to the potentiometer 52, an encoder or the like if necessary such as a pulse transmitter or other position detecting sensor, as long as it can detect the [current location] T ₂ of the at least dancer roll 44 may employ other things. Further, as another means for detecting the fluctuation amount for obtaining the winding diameter of the film raw roll 28, for example, as shown in FIG. 9, an encoder E4 is provided in the film loading means 22, and the encoder E4 The winding diameter of the film roll 28 may be calculated by detecting the amount of rotation of the film loading means 22. Further, using the encoder E3 provided in the film transfer path from the film roll 28 to the dancer roller 44, the film roll 28 is detected based on the transfer amount of the strip film 26 detected by the encoder E3.
Can be calculated. The dancer roller is not limited to the swinging type in the left and right directions as in the embodiment, but may be modified into various types such as a swinging type in the up and down direction, a vertical and vertical movement or a horizontal and horizontal movement method.

[0037]

As described above, according to the film transfer device of the horizontal bag making and filling machine according to the present invention, during continuous operation of the bag making and filling machine, the fluctuation of the dancer roller from the target position is monitored. By controlling the speed of the fourth motor so as to hold the roller at the target position, the belt-like film drawn from the film roll is transported toward the bag making machine with a substantially constant tension, and stretches and meanders the film. It is possible to effectively prevent the belt-like film from being transported and formed into a tubular shape. Further, by calculating the winding diameter of the film roll at each predetermined rotation of the film feed roller and sequentially feeding back the data, the accuracy of the initial winding diameter data is not required, and data input such as film thickness is unnecessary. Become. Furthermore, the detection result of the film transfer amount detecting means is compared with the data corresponding to the input film cut pitch, or the registration mark detection timing by the registration mark detection sensor and the data input film cut pitch are compared. Comparing with the corresponding target registration mark detection timing, and when the value is different, by controlling the speed of the third motor, the cylindrical film can be reliably transferred according to the set film transfer speed, and the film can be reliably transferred. A belt-shaped film having a regular length can always be drawn from the raw roll.

Further, by changing the target position of the dancer roller, the tension on the belt-like film transferred toward the bag-making machine can be set to an arbitrary value. Film transfer control in consideration of various conditions such as the elongation of the film. Further, there is an advantage that the end of the film can be reliably detected by monitoring the fluctuation of the dancer roller to the fluctuation upper / lower limit position or the rapid fluctuation per predetermined time.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a horizontal bag making and filling machine provided with a film transfer device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram illustrating a dancer roller of the film transfer device according to the embodiment.

FIG. 3 is an explanatory diagram showing a state in which a current position of a dancer roller of the film transfer device according to the embodiment is located on a tension increasing side from a film winding diameter measurement start position.

FIG. 4 is an explanatory diagram showing a state in which a current position of a dancer roller of the film transfer device according to the embodiment is located on a tension decreasing side from a film winding diameter measurement start position.

FIG. 5 is a control flowchart for rotating a fourth motor at a speed dependent on the speed of a third motor in the film transport device according to the embodiment.

FIG. 6 is a control flowchart for holding a dancer roller at a target position in the film transport device according to the embodiment.

FIG. 7 is a control flowchart for calculating a winding diameter of a raw film roll during continuous operation in the film transport device according to the embodiment.

FIG. 8 is an explanatory diagram showing another means for detecting data for controlling the speed of the third motor of the film transport device according to the embodiment.

FIG. 9 is an explanatory diagram showing another means for detecting a fluctuation amount for calculating a winding diameter of a film roll of the film transport device according to the embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Horizontal bag making and filling machine 12 Article 18 Supply conveyor 20 Control means 22 Film loading means 26 Strip film 26a Cylindrical film 28 Film raw roll 32 Bag making machine 34 Film feed roller 38 Vertical sealer 40 Horizontal seal mechanism 44 Dancer roller 56 Reference speed Setting means 58 Dancer roller fluctuation control means 60 Film speed control means 64 Input means 82 Transfer amount correction means 84 Registration mark detection sensor M1 First motor M2 Second motor M3 Third motor M4 Fourth motor E1 Encoder (rotation amount detection means) E3 encoder (film transport amount detecting means) E4 encoder (rotation amount detecting means) T ₀ target position T ₃ swing (fluctuation) lower limit position T ₄ swings (change) the upper limit position

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Mitsuhiro Okazaki 4-380 Nakaodai, Nishi-ku, Nagoya, Aichi Prefecture Inside Fujikikai Nagoya Plant (72) Inventor Masanori Hashimoto 4-380, Nakaodai, Nishi-ku, Nagoya-shi, Aichi Fujikikai Nagoya Factory Co., Ltd.

Claims (5)

[Claims] 1. A bag making machine (32) for forming a belt-like film (26) drawn from a film roll (28) into a tubular shape, and an article (26) directed toward a tubular-shaped film (26a). A supply conveyor (18) for supplying a predetermined film at predetermined intervals, and a cylindrical film (26).
a) film transport means (34) for transporting the overlapped edge in the longitudinal direction of (a) to the downstream side by rotating and rotating, and a vertical seal on the overlapped edge of the tubular film (26a); In a horizontal bag-making and filling machine (10) comprising a vertical sealer (38) for applying and a horizontal sealing mechanism (40) for performing horizontal sealing and cutting before and after sandwiching the article (12) of the tubular film (26a). A first motor (M1) for driving the supply conveyor (18), a second motor (M2) for driving the horizontal sealing mechanism (40), and the film transfer means (34) at a predetermined film transfer speed. A third motor (M3) that rotates at a corresponding speed; the first motor (M1), the second motor (M2), and the third motor (M3)
And a film loading means (22) which is rotationally controlled at a speed dependent on the rotation of the third motor (M3), and in which the film roll (28) is loaded and held. A fourth motor (M4) for driving the film roll (28) to apply a predetermined tension to the band-shaped film (26) from the raw film roll (28) to the bag making device (32), and depending on the position, the band-shaped film (26) The rotation amount of the fourth motor (M4) or the rotation amount of the film loading means (22) is detected with respect to the rotation of the dancer roller (44) set to be capable of changing the tension of the film raw material roll (28). Possible rotation amount detection means (E1, E4), and a film transfer amount detection means (E3) provided on a film transfer path from the dancer roller (44) to the bag making device (32), the control means ( 20) is the film transfer amount detecting means (E3)
Is compared with the data corresponding to the inputted film cut pitch, and when the values are different, the transfer amount correcting means (8) for controlling the speed change of the third motor (M3).
2) and setting a target position (T ₀ ) of the dancer roller (44) for setting the tension on the strip film (26),
The third motor according to the variation from the target position (T ₀ ) of (44)
A dancer roller fluctuation control means (58) for outputting a shift control signal of the fourth motor (M4) based on the rotation speed of (M3), and a rotation amount detecting means (E) for each predetermined rotation of the film transport means (34).
1, E4) the amount of rotation from the film roll
A reference speed setting means (56) for outputting a reference rotation speed signal of the fourth motor (M4) according to the winding diameter of (28), an output signal of the dancer roller fluctuation control means (58) and a reference speed setting means (5
6. A film transfer device for a horizontal bag making and filling machine, comprising: film speed control means (60) for controlling the speed of the fourth motor (M4) from the output signal of (6). 2. A bag-making device (32) for forming a belt-like film (26) drawn from a film roll (28) into a tubular shape, and an article (26) directed toward a tubular-shaped film (26a). A supply conveyor (18) for supplying a predetermined film at predetermined intervals, and a cylindrical film (26).
a) film transport means (34) for transporting the overlapped edge in the longitudinal direction of (a) to the downstream side by rotating and rotating, and a vertical seal on the overlapped edge of the tubular film (26a); In a horizontal bag-making and filling machine (10) comprising a vertical sealer (38) for applying and a horizontal sealing mechanism (40) for performing horizontal sealing and cutting before and after sandwiching the article (12) of the tubular film (26a). A first motor (M1) for driving the supply conveyor (18), a second motor (M2) for driving the horizontal sealing mechanism (40), and the film transfer means (34) at a predetermined film transfer speed. A third motor (M3) that rotates at a corresponding speed; the first motor (M1), the second motor (M2), and the third motor (M3)
And a film loading means (22) which is rotationally controlled at a speed dependent on the rotation of the third motor (M3), and in which the film roll (28) is loaded and held. A fourth motor (M4) for driving the film roll (28) to apply a predetermined tension to the band-shaped film (26) from the raw film roll (28) to the bag making device (32), and depending on the position, the band-shaped film (26) The rotation amount of the fourth motor (M4) or the rotation amount of the film loading means (22) is detected with respect to the rotation of the dancer roller (44) set to be capable of changing the tension of the film raw material roll (28). Possible rotation amount detecting means (E1, E4), and a registration mark detecting sensor (84) provided on a film transfer path from the dancer roller (44) to the bag making device (32), the control means (20 ) Is the detection timing of the registration mark attached to the strip film (26) by the registration mark detection sensor (84). And a transfer amount correcting means (82) for controlling the speed of the third motor (M3) when the values are different. A target position (T ₀ ) of the dancer roller (44) is set for setting a tension on the strip film (26), and the third position is set according to a change from the target position (T ₀ ) of the dancer roller (44). A dancer roller fluctuation control means (58) for outputting a shift control signal of the fourth motor (M4) based on the rotation speed of the motor (M3); and a rotation amount detection means for each predetermined rotation of the film transfer means (34). E1, E4) to detect the rotation amount,
Fourth motor according to the winding diameter of the film roll (28)
(M4) Reference speed setting means (5
6) and the output signal of the dancer roller fluctuation control means (58) and the output signal of the reference speed setting means (56).
And a film speed control means (60) for controlling the speed of (M4). 3. The control means (20) includes:
(44) It is set to detect either a change to the upper / lower limit position (T ₃ , T ₄ ) or a sudden change per predetermined time of the dancer roller (44) to output a film end detection signal. 3. A film transfer device for a horizontal bag making and filling machine according to claim 1. 4. The bag making and filling machine (1)
0), the current winding diameter of the raw film roll (28) for determining the speed of the fourth motor (M4) at the time of the start is determined by the dancer roller (44) when the fourth motor (M4) is rotationally driven. The film transfer device for a horizontal bag making and filling machine according to any one of claims 1 to 3, wherein the film transfer device is configured to automatically calculate based on a film transfer amount obtained from the movement amount. 5. An input means capable of setting and inputting a target position (T ₀ ) of the dancer roller (44) with an arbitrary value capable of applying a tension corresponding to a property such as a material and a thickness of the strip film (26).
The film transfer device for a horizontal bag making and filling machine according to any one of claims 1 to 4, further comprising (64).