JP2002179006A - Packaging machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging machine capable of preventing a disadvantage caused by a displacement between film feeding and a seal. SOLUTION: A packaging machine 1 comprises a film feeding means 3 for feeding out a belt-like film 2 and forming it into a cylindrical shape, a transferring means 5 for use in transferring a packaged item 4 to as to supply it in sequence into the film 2 formed into the cylindrical shape, and a seal means 20 for applying a seal in repetition to the cylindrical film 2 under a state in which the packaged item 4 is packaged in it. The transferring means 5 is driven by a first motor 9, the film feeding means 3 is driven by a second motor 15, and the seal means 10 is driven by a third motor 21. The second motor 15 is controlled synchronously in reference to the third motor 21. Due to this fact, even in the case that an operation of the third motor 21 is delayed by a certain cause, there occurs no possibility that the film 2 is fed more surplus than that planned.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging machine, and more particularly to a technical field including a packaging machine for automatically packaging an object to be packaged with a film.

[0002]

2. Description of the Related Art In general, in a horizontal bag making and filling machine, a film is transported in a horizontal direction while being formed into a cylindrical shape, and articles to be packaged are sequentially supplied into the cylindrical film. A center seal is applied to the overlapped portion in the longitudinal direction of the tubular film, and further, end seals are applied to the front and rear portions so as to sandwich the packaged object in the tubular film, and cutting is performed. In this way, a so-called pillow package is manufactured.

[0003] The above-mentioned packaging machine comprises a film feeding means for feeding a strip-shaped film to form a tubular film, and a conveying device for feeding the packaged material into the tubular film in order. And sealing means for repeatedly applying a seal to the cylindrical film while wrapping the article to be packaged. Further, drive motors are provided corresponding to the respective units, and the respective units are driven and controlled based on the operation of the respective drive motors. As such a packaging machine, for example, Japanese Patent Publication No. 1-16740,
Alternatively, there is one described in Japanese Patent No. 2927500.

In the former packaging machine, the motor for the film feeding means and the motor for the sealing means are controlled synchronously with the motor for the conveying means. More specifically, a supply origin sensor detects a supply position of a package to be supplied based on the driving of the motor for the transport unit. Then, the motor for the film feeding means and the motor for the sealing means are respectively controlled on the basis of the origin position signal and the like relating to the feeding position.

In the latter packaging machine, an ideal driving signal generating means for outputting a driving signal corresponding to an ideal state is provided. Then, only with the ideal drive signal generating means, the drive motors are controlled so as to be synchronized.

[0006]

However, none of the above-mentioned wrapping machines is configured to perform synchronous control between the motor for the film feeding means and the motor for the sealing means. There is a possibility that the following problems may occur.

That is, if the operation of the motor for the sealing means is delayed for any reason (for example, due to a load on the motor) while the motor for the conveying means is operating normally, the film feeding means Motor is independent of the operation of the motor for the sealing means,
The film is fed at the same pace as before without adjusting the speed of the motor for the film feeding means. For this reason, the film may be sent more than expected, and as a result, the resulting product may be wrinkled.

The present invention has been made in view of the above circumstances, and has as one of its main objects to provide a packaging machine capable of preventing a problem caused by a gap between a film feed and a seal. I have.

[0009]

Means for Solving the Problems and Effects There will be described below characteristic means for achieving the above object. Also,
For each means, characteristic actions and effects will be described as necessary.

Means 1. Film feeding means for feeding a band-shaped film to form a cylindrical film, conveying means for conveying the packaged object so as to sequentially supply the packaged object into the cylindrical film, and A sealing means for repeatedly applying a seal to the cylindrical film in a state where the package is wrapped, and a first means for driving the transport means.
A driving means for driving the film feeding means, a second driving means for driving the sealing means, and a second driving means for driving the sealing means. A synchronous control based on the third drive means.

According to the above means 1, the film feeding means is driven by the second driving means, and the strip film is fed out by the film feeding means to form a cylindrical film. The transporting means is driven by the first driving means, and the articles to be packaged are transported by the transporting means, and are sequentially supplied into the cylindrical film. Further, the sealing means is driven by the third drive means, and the sealing means repeatedly seals the tubular film in a state where the article to be packaged is wrapped. Here, the second driving means is controlled synchronously with the third driving means as a reference. For this reason, even if the operation of the third driving unit is delayed due to some reason such as a load, the second driving unit is synchronously controlled based on the third driving unit. Therefore, the film is sent in synchronization with the movement of the sealing means. Therefore, a situation in which the film is fed more than expected does not occur.
As a result, a product can be manufactured stably, and a problem due to a gap between the film feeding and the seal, for example, a problem that a wrinkle or the like occurs in the obtained product can be prevented.

Means 2. The third driving means is connected to the first driving means.
2. A packaging machine according to claim 1, wherein said packaging machine is configured to perform synchronous control based on said driving means.

According to the above means 2, in addition to the operation and effect of the means 1, the third driving means is synchronously controlled on the basis of the first driving means. Therefore, the sealing is performed stably in synchronization with the transport timing of the transport unit.
Further, even if the timing is shifted in the process before the transporting means, since the timing is controlled based on the first driving means, such a shifting can be absorbed on the upstream side, and the seal and the film can be absorbed. There is no adverse effect on feeding.

Means 3. Ideal signal generating means capable of generating a signal corresponding to an ideal state in which the film is fed at a constant speed is provided, and the first and third driving means include:
2. The packaging machine according to claim 1, wherein each of the packaging machines is configured to be synchronously controlled with the ideal signal generating unit.

According to the means 3, the signal corresponding to the ideal state in which the film is fed at a constant speed is generated by the ideal signal generating means. Then, the first and third driving units are synchronously controlled with the ideal signal generating unit. Therefore, the sealing is performed stably in synchronization with the transport timing of the transport unit. Further, even if the timing is shifted in the process before the transporting means, the first and third driving means are controlled synchronously, so that such a shift is eliminated by the transporting means corresponding to the first driving means. On the side (upstream side), it is possible to absorb, and there is no adverse effect on the seal and the film feed.

Means 4. Film feeding means for feeding a band-shaped film to form a cylindrical film, conveying means for conveying the packaged object so as to sequentially supply the packaged object into the cylindrical film, and A sealing means for repeatedly applying a seal to the cylindrical film in a state where the package is wrapped, and a first means for driving the transport means.
, A second driving means for driving the film feeding means, and a third driving means for driving the sealing means, wherein at least the second driving means A packaging machine, further comprising control means for controlling the means, wherein the control means controls the second driving means so that the film is fed at least in accordance with the phase of the sealing means.

According to the above means 4, the film feeding means is driven by the second driving means, and the strip film is fed out by the film feeding means to form a cylindrical film. The transporting means is driven by the first driving means, and the articles to be packaged are transported by the transporting means, and are sequentially supplied into the cylindrical film. Further, the sealing means is driven by the third drive means, and the sealing means repeatedly seals the tubular film in a state where the article to be packaged is wrapped. Further, at least the second driving means is controlled by the control means. At this time, the control means controls the second driving means so that the film is fed at least in accordance with the phase of the sealing means. For this reason, even if the operation of the third driving means is delayed due to some reason such as a load, the second driving means is controlled in accordance with the phase of the sealing means.
The film is sent in synchronization with the movement of the sealing means. Therefore, a situation in which the film is fed more than expected does not occur. As a result, a product can be manufactured stably, and a problem due to a gap between the film feeding and the seal, for example, a problem that a wrinkle or the like occurs in the obtained product can be prevented.

Means 5. The packaging machine according to claim 4, wherein the control unit further controls at least a third driving unit so that the cylindrical film is sealed in accordance with a phase of the transport unit. .

According to the means (5), in addition to the operation and effect of the means (4), the control means controls the third driving means so that the cylindrical film is sealed in accordance with the phase of the conveying means. Is done. Therefore, the sealing is performed stably in synchronization with the transport timing of the transport unit.
In addition, even if a timing shift occurs in the process before the conveying means, since the timing is controlled in accordance with the phase of the conveying means, such a shift can be absorbed on the upstream side, and the sealing and film feeding can be performed. Has no adverse effect on

Means 6 An ideal signal generating means capable of generating a signal corresponding to an ideal state in which the film is fed at a constant speed is provided, and the transport of the packaged object and the sealing of the film are performed in accordance with the phase of the signal. 5. The packaging machine according to claim 4, wherein

According to the means 6, the signal corresponding to the ideal state in which the film is fed at a constant speed is generated by the ideal signal generating means. Then, the transport of the article to be packaged and the sealing of the film are performed in accordance with the phase of the signal from the ideal signal generating means. For this reason, the transfer timing of the transfer means and the seal timing of the sealing means are synchronized, and the sealing is performed stably. In addition, even if a timing shift occurs in the process before the transfer means, since the transfer and the seal are controlled together, such a shift is performed.
Absorption can be performed on the upstream conveying means side, and there is no adverse effect on the seal and the film feeding.

Means 7. The packaging machine according to any one of claims 1 to 6, wherein the sealing means includes a cutting mechanism for cutting the film when sealing the film.

According to the means 7, the cutting mechanism provided in the sealing means simultaneously cuts the film when sealing the film. For this reason, the trouble of separately cutting can be omitted, and the space of the equipment can be saved.

Means 8. The packaging machine according to any one of means 1 to 7, wherein the first, second, and third driving means are each constituted by a servomotor.

According to the means 8, the first, second and third driving means are each constituted by a servomotor, and the rotation of each motor is so-called servo-controlled. For this reason, more delicate control can be performed, and problems such as displacement can be more reliably suppressed.

Means 9 The film feeding means is a feeding roll that feeds out a band-shaped film, a guide member that guides the fed-out film in a tubular shape, and a center seal roll that seals edges of the film to perform a center seal. The packing machine according to any one of means 1 to 8, further comprising: a feeding roll and a center seal roll operated by the second driving means.

According to the above means 9, in the film feeding means, the strip-shaped film is fed by the feeding roll, and the fed film is guided in a tubular shape by the guide member. In addition, the edges of the film are sealed by a center seal roll to perform center sealing. And the feeding roll and the center seal roll are the second
Is operated by the driving means. As described above, the feeding and the center seal are operated by one driving means, so that there is no timing difference between the two and the malfunction due to the increase of the driving means can be suppressed.

Means 10. The transporting means includes a conveyor capable of transporting the article to be packaged at a predetermined interval and sequentially supplying the articles into the cylindrical film, and the conveyor is operated by the first driving means. Means 1 to do
10. The packaging machine according to any one of claims 1 to 9.

According to the above means 10, in the conveying means, the articles to be packaged are conveyed by the conveyor at predetermined intervals.
They can be supplied sequentially in a cylindrical film. Then, the conveyor is operated by the first driving means.

Means 11 The sealing means is disposed so as to oppose each other across the film transfer path,
A first seal body and a second seal body are provided movably in a contact direction and a separation direction, and the first seal body and the second seal body are operated by a third driving unit. The packaging machine according to any one of means 1 to 10, characterized in that:

According to the means (11), in the sealing means, the first seal member and the second seal member disposed so as to face each other with the film transfer path interposed therebetween are arranged in the contact direction and the separation direction. The seal is applied by being moved to. Then, the first seal member and the second seal member are operated by the third driving means.

Means 12. Means 1 wherein the first driving means is operated at a preset speed.
12. The packaging machine according to any one of claims 1 to 11.

According to the means 12, it is not necessary to separately perform complicated control on the first driving means, and the control content can be simplified.

[0034]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment)
The embodiment will be described with reference to FIGS. 1 to 3. FIG.

As shown in FIG. 1, the packaging machine 1 comprises a film feeding means 3 for feeding out a band-like film 2 to form a tube, and an object 4 to be wrapped inside the film 2 formed into the tube. Conveying means 5 for conveying the packaged object 4 so as to sequentially supply the packaged material, and sealing means 10 for repeatedly applying a seal (end seal) to the tubular film 2 in a state where the packaged object 4 is wrapped. It has.

The conveying means 5 includes a pulley 6 rotatably provided as a front and rear pair, and a timing belt 7 as a conveyor suspended on the pulley 6. A feeding claw 8 extending toward the outer peripheral direction is provided on the timing belt 7.
Are provided at predetermined intervals. In addition, the conveying means 5
It is designed to be driven by a first motor 9 as first driving means. The first motor 9 is constituted by a servomotor, and its rotation is constituted by a rotational force transmission mechanism (constituted by gears, shafts, pulleys, timing belts, etc.).
Is transmitted to the pulley 6 via That is, when the first motor 9 is rotated, the pulley 6 rotates in a predetermined direction, and the timing belt 7 rotates. As a result, the downwardly extending feed claw 8 moves forward (to the right in the drawing), and the articles to be packaged 4 placed on the carrier (not shown) are sequentially sent forward.

The film feeding means 3 has a feeding roll 11 for feeding the belt-like film 2. That is, the band-shaped film 2 is wound in a roll shape on the upstream side, and the drawn-out end of the film 2
It has been guided to. The strip-shaped film 2 is marked at predetermined intervals. The film 2 is guided to a pair of guide members 13 via a tension roll 12. The guide member 13 has a tapered shape, and guides the film 2 in a cylindrical shape while gradually bending both sides in the width direction of the band-shaped film 2. In front of the guide member 13, the center seal roll 1
4 are provided. The center seal roll 14 serves to seal the upper edges of the cylindrical film 2 to perform center sealing and to send the film 2 forward.

The film feed means 3 is driven by a second motor 15 as a second drive means. The second motor 15 is also constituted by a servomotor, and its rotation is transmitted by a rotational force transmission mechanism (gear, shaft,
(Formed by a pulley, a timing belt, etc.) to the feeding roll 11 and the center seal roll 14. That is, when the second motor 15 is rotated, the feeding roll 11 rotates in a predetermined direction,
Thereby, the belt-shaped film 2 is pulled out forward.
Further, with the rotation of the second motor 15, the center seal roll 14 rotates in a predetermined direction, whereby the upper edges of the tubular film 2 are sealed with each other.
Is sent forward.

The sealing means 10 includes an upper seal bar 16 and a lower seal bar 17 which constitute a first seal body and a second seal body, respectively. The two seal bars 16, 17 are disposed so as to face each other with the transfer path of the film 2 therebetween, and are provided so as to be movable in the contact direction and the separation direction. That is, both ends of the upper seal bar 16 and the lower seal bar 17 are respectively supported at positions eccentric with respect to the upper and lower pairs of gears 18 and 19, respectively.
It moves up and down in the direction of separation.

The sealing means 10 is driven by a third motor 21 as a third driving means. The third motor 21 is also configured by a servomotor, and its rotation is transmitted to the gears 18 and 19 via a rotational force transmission mechanism (configured by gears, shafts, and the like). That is, when the third motor 21 is rotated, the gears 18 and 19 rotate in directions opposite to each other, whereby the upper seal bar 16 and the lower seal bar 17
It moves up and down in the contact and separation directions. Both seal bars 1
6 and 17 move horizontally in the feeding direction of the film 2 during the period in which they are in contact with each other. And during this time, film 2
Is subjected to an end seal.

A cut mechanism (not shown) is provided on at least one of the seal bars 16 and 17.
Therefore, the film 2 is sealed by the seal bars 16 and 17 and cut at the same time.

The package 22 is finally obtained through such a series of means 3, 5, 10. The package 22 is carried out to another location by a carry-out conveyor (not shown).

In this embodiment, the driving of the first motor 9, the second motor 15, and the third motor 21 is mainly controlled by the control means 30. Next, the electrical configuration and the like of the control unit 30 will be described. FIG. 2 is a block diagram for explaining an electrical configuration of the control unit 30 and the like. As shown in the figure, the control means 30 includes a first speed command unit 31 for giving a speed command to the first motor 9, a second speed command unit 32 for giving a speed command to the second motor 15, And a third speed command unit 33 for giving a speed command to the third motor 21. The control means 30 includes a second speed correction unit 34 and a third speed correction unit 35 corresponding to the second and third speed command units 32 and 33.

Various initial data from the setting unit 36 are input to the speed command units 31 to 33. The various initial data include a separately set transport speed, bag length, mark interval, and the like.

First speed command section 31, second speed command section 3
The speed command signals from the second and third speed command units 33 are respectively sent to the first motor 9, the second motor 15, and the third motor 21 via the first, second, and third servo amplifiers 41, 42, and 43, respectively.
Is output to. Thereby, each motor 9, 15, 21
Is controlled. Also, the first
The motor 9, the second motor 15, and the third motor 21 have a first encoder (a rotary encoder, hereinafter the same) 44, a second encoder 45, and a third encoder 4, respectively.
6 are equipped. Then, a pulse signal emitted from the first encoder 44 is input to the first servo amplifier 41 and the third speed correction unit 35. Further, a pulse signal emitted from the third encoder 46 is input to the third servo amplifier 43 and the third speed correction unit 35 and the second speed correction unit 34. Further, the pulse signal generated from the second encoder 45 is transmitted to the second servo amplifier 42 and the second
The data is input to the speed correction unit 34.

Next, the operation and effect of this embodiment configured as described above will be described.

When operating the packaging machine 1, first, an operator performs a predetermined input operation on the setting device 36 in advance. Based on such input data, various initial data signals are first to first.
The signals are input to the third speed command units 31 to 33. On the basis of various initial data signals, the first speed command unit 31 operates the first servo amplifier 4 to operate the first motor 9 at a predetermined speed.
An operation signal is output to the first motor 9 via 1 to thereby operate the first motor 9. Then, a pulse signal output from the first encoder 44 provided in the first motor 9 is input to the first servo amplifier 41, and based on the signal, feedback control is performed so that the first motor 9 operates at a predetermined speed. Done. Therefore, the first motor 9
Basically, it always rotates at a constant speed, and the packaged object 4 is transported at a constant speed.

The third speed command section 33 receives a correction signal from the third speed correction section 35 in addition to the initial data signal. The pulse signal from the first encoder 44 is input to the third speed correction unit 35 in addition to the pulse signal from the third encoder 46 provided in the third motor 21. Then, the third speed correction unit 35 sets the two pulse signals in synchronization with each other, that is,
A correction signal is generated so that the phase with the seal of the film 2 matches, and is output to the third speed command unit 33. Upon receiving this, the third speed command section 33 outputs a predetermined operation signal to the third motor 21 via the third servo amplifier 43. Thereby, the third motor 21 operates at a predetermined speed. In addition,
The pulse signal emitted from the third encoder 46 provided in the third motor 21 is input to the third servo amplifier 43, and based on the signal, feedback control is performed so that the third motor 21 operates at a predetermined speed. . Therefore, the third motor 21 rotates in synchronization with the first motor 9, and the end seal is performed in synchronization with the conveyance of the packaged object 4.

Further, a correction signal from a second speed correction unit 34 is input to the second speed command unit 32 in addition to the initial data signal. The pulse signal from the third encoder 46 is input to the second speed correction unit 34 in addition to the pulse signal from the second encoder 45 provided in the second motor 15. Then, the second speed correction unit 34 generates a correction signal so that both pulse signals are synchronized, that is, so that the phase of the end seal of the film 2 and the feeding of the film 2 match, and the second speed command Output to the unit 32. Upon receiving this, the second speed command unit 32 outputs a predetermined operation signal to the second motor 15 via the second servo amplifier 42. As a result, the second motor 15 operates at a predetermined speed. Note that a pulse signal generated from the second encoder 45 provided in the second motor 15 is input to the second servo amplifier 42, and based on the signal, feedback control is performed so that the second motor 15 operates at a predetermined speed. Done. For this reason, the second motor 15 is
The film 2 rotates in synchronization with the
Will be sent out.

As described above, in the present embodiment, as shown in FIG. 3, the second motor 15 is controlled synchronously with respect to the third motor 21 (there is a subordinate relationship). Therefore, even if the operation of the third motor 21 is delayed for some reason such as a load, the film feeding means 3 is operated in synchronization with the movement of the sealing means 10, and The film is fed in accordance with the timing. Therefore, there is no possibility that the film 2 is sent more than expected. As a result, a product can be manufactured stably, and a problem due to a gap between the film feeding and the seal, for example, a problem that a wrinkle or the like occurs in the obtained product can be prevented.

In the present embodiment, the third motor 21
Are controlled synchronously based on the first motor 9 (there is a subordinate relationship). Therefore, the seal is performed stably in synchronization with the transport timing of the transport unit 5. Further, even if the timing between each unit and the transport unit 5 is shifted in the process before the transport unit 5, such a shift is performed because the third motor 21 is synchronously controlled based on the first motor 9. Can be absorbed on the upstream side without adversely affecting the seal and the film feeding.

(Second Embodiment) Next, a second embodiment will be described with reference to FIGS. However, in this embodiment, the description of the same parts as those in the first embodiment will be omitted, and the following description will focus on the different parts.

As shown in FIG. 4, the driving of the first motor 9, the second motor 15 and the third motor 21 is mainly controlled by the control means 50. The control means 50 includes a first speed command unit 51 for giving a speed command to the first motor 9, a second speed command unit 52 for giving a speed command to the second motor 15, and a third motor 21. A third speed command unit 53 for giving a speed command is provided. Further, the control unit 50 includes a second speed correction unit 54 corresponding to the second speed command unit 52.

Further, the control means 50 has an ideal signal generating means 60 capable of generating a signal corresponding to an ideal state in which the film 2 is fed at a constant speed. Various initial data from the setter 36 is input to the ideal signal generating means 60. The ideal signal generating means 60 is a virtual motor that rotates and stops in a so-called ideal state based on the initial data, and is composed of, for example, a crystal oscillator. The oscillation frequency is
The oscillation frequency of the pulse emitted from the second encoder 45 when the second motor 15 is operating in an ideal state is adjusted. In the present embodiment, the first
The third motors 9 and 21 are configured to be synchronously controlled with the ideal signal generating means 60, respectively.

The second speed command unit 52 includes a setting device 3
6, various initial data are input.

Then, a pulse signal emitted from the first encoder 44 provided in the first motor 9 is input to the first servo amplifier 41. The pulse signal generated from the third encoder 46 provided in the third motor 21 is transmitted to the third servo amplifier 43 and the second speed corrector 54.
Is entered. Further, a pulse signal emitted from the second encoder 45 provided in the second motor 15 is input to the second servo amplifier 42 and the second speed correction unit 54.

Next, the operation and effect of this embodiment configured as described above will be described.

In operation of the packaging machine 1, first, an operator performs a predetermined input operation on the setting device 36. Various initial data signals are input to the ideal signal generating means 60 and the second speed command unit 52 based on the input data. Based on the various initial data signals, the ideal signal generating means 60 operates the first speed command unit 51 and the third speed command unit 5 to operate the first motor 9 and the third motor 21 at a predetermined speed.
3 to output a pulse signal. In response to this, the first speed command section 51 receives the first motor 9 via the first servo amplifier 41.
An operation signal is output to the first motor 9 so that the first motor 9 operates. Similarly, the third speed command unit 53 receives the pulse signal and receives the third motor 2 via the third servo amplifier 43.
1 to output an operation signal, whereby the third motor 21 operates.

The second speed command section 52 receives a correction signal from the second speed correction section 54 in addition to the initial data signal. The pulse signal from the third encoder 46 is input to the second speed correction unit 54 in addition to the pulse signal from the second encoder 45 provided in the second motor 15. Then, the second speed correction unit 54 sets the two pulse signals in synchronization, that is, so that the phase of the end seal of the film 2 and the phase of the delivery of the film 2 match.
A correction signal is generated and output to the second speed command unit 52.
In response to this, the second speed command section 52 outputs a predetermined operation signal to the second motor 15 via the second servo amplifier 42. As a result, the second motor 15 operates at a predetermined speed.

As described above, in the present embodiment, as shown in FIG. 5, the second motor 15 is controlled synchronously with the third motor 21 as a reference (there is a subordinate relationship). Therefore, the same operation and effect as those of the first embodiment can be obtained.

In the present embodiment, the ideal signal generating means 60 generates a signal corresponding to an ideal state in which the film 2 is fed at a constant speed. Then, the first and third motors 9 and 21 are synchronously controlled with the ideal signal generating means 60 (subordinate to the ideal signal generating means 60). Therefore, the transport means 5
The sealing is performed stably in synchronism with the transfer timing.

Incidentally, the present invention is not limited to the contents described in the above embodiment, and may be carried out, for example, as follows.

(A) In the above embodiment, the transport means 5
Is constituted by a combination of the pulley 6 and the timing belt 7, but may be constituted by a combination of a pair of sprockets and an endless chain suspended on them. Moreover, you may comprise by the combination of a roller and a belt conveyor.

(B) Although the sealing means 10 is provided with a cutting mechanism, the sealing means 10 may not be provided with the cutting mechanism. That is, cutting may be performed after the sealing means 10. Instead of cutting, a slit (notch, notch, or the like), a perforation, or the like may be formed using another cutter or a saw blade.

(C) In the above embodiment, no particular reference is made to mark alignment (positioning when a mark is provided on the film 2). Second motor 1 when sealing
The positioning may be performed by changing the speed of No. 5.

(D) A configuration may be adopted in which one package 22 contains a plurality of packages 4.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view illustrating an entire configuration of a packaging machine according to a first embodiment.

FIG. 2 is a block diagram for explaining an electrical configuration of a control unit and the like.

FIG. 3 is a schematic diagram for explaining the dependency of each motor.

FIG. 4 is a block diagram for explaining an electrical configuration of a control unit and the like in a second embodiment.

FIG. 5 is a schematic diagram for explaining the dependency of each motor.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Packaging machine, 2 ... Film, 3 ... Film feeding means, 4
.., Articles to be packaged, 5... Conveying means, 6... Pulleys, 7... Timing belt as a conveyor, 8.
Feeding roll, 13: guide member, 14: center seal roll, 15: second motor as second driving means,
16 ... upper seal bar as first seal body, 17 ...
Lower seal bar as a second seal body, 21... Third motor as third drive means, 22.
0: control means, 31, 51: first speed command unit, 32, 5
2 ... second speed command section, 33, 53 ... third speed command section, 3
4, 54 ... second speed correction unit, 35 ... third speed correction unit, 3
6: setting device, 60: ideal signal generating means.

Claims (11)

[Claims] 1. A film feeding means for feeding a belt-like film to form a tubular film, and a transport for transporting the package to sequentially feed the package into the tubular film. Means, a sealing means for repeatedly applying a seal to the tubular film in a state where the packaged object is wrapped, a first driving means for driving the transport means, and a driving means for the film feeding means And a third driving means for driving the sealing means, wherein the second driving means is synchronized with the third driving means as a reference. A packaging machine characterized by being controlled. 2. The packaging machine according to claim 1, wherein the third drive unit is configured to perform synchronous control based on the first drive unit. 3. An ideal signal generating means capable of generating a signal corresponding to an ideal state in which the film is fed at a constant speed, wherein the first and third driving means are respectively provided with the ideal signal generating means and The packaging machine according to claim 1, wherein the packaging machine is configured to be controlled synchronously between the packaging machines. 4. A film feeding means for feeding a belt-like film to form a cylindrical film, and a transport for transporting the package to sequentially feed the package into the cylindrical film. Means, a sealing means for repeatedly applying a seal to the tubular film in a state where the packaged object is wrapped, a first driving means for driving the transport means, and a driving means for the film feeding means And a third driving means for driving the sealing means, comprising: a control means for controlling at least the second driving means; and The packaging machine is characterized in that the control means controls the second driving means so that the film is fed at least in accordance with the phase of the sealing means. 5. The control means for controlling at least a third drive means so that a seal is applied to the cylindrical film in accordance with a phase of the transport means. 4. The packaging machine according to 4. 6. An ideal signal generating means capable of generating a signal corresponding to an ideal state in which the film is fed at a constant speed, wherein the transport of the packaged object and the sealing of the film match the phase of the signal. The packaging machine according to claim 4, wherein the packaging machine is configured to perform the processing. 7. The packaging machine according to claim 1, wherein the sealing means includes a cutting mechanism for cutting the film when sealing the film. 8. The first, second and third driving means,
The packaging machine according to any one of claims 1 to 7, wherein each of the packaging machines comprises a servomotor. 9. The film feeding means includes: a feeding roll for feeding a belt-shaped film; a guide member for guiding the fed film in a tubular shape; and a center seal for sealing edges of the film. The packaging machine according to any one of claims 1 to 8, further comprising a center seal roll, wherein the feeding roll and the center seal roll are operated by the second driving unit. 10. The transporting means includes a conveyor capable of transporting the articles to be packaged at predetermined intervals and sequentially supplying the articles into the tubular film, and the conveyor is operated by the first driving means. The packaging machine according to any one of claims 1 to 9, wherein the packaging machine is provided. 11. The first sealing member and the second sealing member, which are disposed so as to face each other with the film transfer path interposed therebetween, and are provided so as to be movable in a contact direction and a separation direction. The packaging machine according to any one of claims 1 to 10, further comprising a seal, wherein the first seal and the second seal are operated by a third driving unit.