JPH09262914A - Bag making machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently manufacture a plastic bag with a spout by inserting the spout into a clearance between the layers of a two-tiered plastic film and sealing by ultrasonic wave the plastic film and the spout with the help of ultrasonic sealing heads. SOLUTION: An accessory is inserted into a clearance between the layers of a two-tiered plastic film 13 each time the plastic film 13 is intermittently fed, then a pair of ultrasonic sealing heads 24 are pressed against the plastic film 13 and the accessory, and an ultrasonic vibration is applied to both plastic film 13 and accessory. Thus the two-tiered plastic film 13 is sealed to the accessory by ultrasonic wave.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag making machine for producing plastic bags having accessories such as spouts.

[0002]

2. Description of the Related Art In a bag-making machine for producing plastic bags, usually, two layers of plastic films are intermittently fed through a plurality of pairs of heaters. It is pressed onto a two-layer plastic film. Therefore, each plastic film is pressed and heated by the heater, and the two layers of plastic film are heat-sealed in the length direction and the width direction. Then, the heat-sealed plastic film is cut in the width direction, whereby a plastic bag of a certain size is manufactured.

By the way, recently, a plastic bag having a spout has been used for containing a liquid such as a beverage. The spout is used to pour out the liquid in a plastic bag and is made of plastic. Usually, the plastic bag is heat sealed to the spout, which secures the two together.

For plastic bags with spouts, it has heretofore been difficult to manufacture them with bag-making machines. The reason is as follows.

For example, in the plastic film feed path, the holder is arranged outside the width direction of the plastic film, and the spout is gripped by the holder. Then, each time the plastic film is intermittently fed, the holder moving mechanism moves the holder to insert the spout between the two layers of plastic film. Further, at the insertion position, a pair of heaters are arranged on both sides of the plastic film in the stacking direction, and each time the spout is inserted, each heater is pressed against the plastic film and the spout,
When the plastic film and the spout are pressed and heated by the heater, the two-layer plastic film is heat-sealed and fixed to the spout. Therefore, in parallel therewith, each plastic film should be heat-sealed in the length direction and the width direction and cut in the width direction, whereby a plastic bag with a spout should be manufactured.

However, spouts have at least a larger heat capacity than plastic films. Therefore, in order to heat and heat seal the plastic film and the spout with the heater, a considerable heating time is required, and the heater needs to be pressed against the plastic film and the spout during the heating time. Furthermore, after heating the plastic film and the spout, it is necessary to cool them sufficiently, which requires a considerable cooling time. The plastic film will not heat seal and stick to the spout until the plastic film and spout have cooled sufficiently. Therefore, the spout cannot be supported by the plastic film, and it is necessary to keep the holder in the gripped state during the cooling time without separating the holder from the spout. Therefore, the plastic film cannot be intermittently fed during the heating time and the cooling time, the efficiency is poor, and the bag making ability of the bag making machine is lowered, which is not practical.

When the plastic film is intermittently fed, it may be possible to synchronize the holder with the plastic film and move the holder in the feeding direction. in this case,
The holder can be kept away from the spout, the spout can be kept gripped and the plastic film and spout can be intermittently fed without having to support the spout by the plastic film. Therefore, after heating the plastic film and the spout and before cooling the plastic film, the plastic film can be intermittently fed, which is efficient. However, not only is the holder movement mechanism of a complicated structure required, but in order to accurately heat seal the plastic film and the spout, during the intermittent feed, the two should be perfectly synchronized and followed, and their position It is necessary to prevent the deviation of Achieving that is not easy.

Further, when heat-sealing a two-layer plastic film in the length direction and the width direction, generally,
A two-stage or three-stage sealing system is used as the sealing system. This is intended to shorten the heating time per intermittent feeding of the plastic film. The two-stage sealing method is that two sets of heaters are arranged at intervals in the plastic film feed path, and the intervals are made to correspond to the intermittent feed amount of the plastic film, and each heater is set for each intermittent feed of the plastic film. It is a method of pressing two layers of plastic film, heating each plastic film twice and heat sealing. The three-stage sealing method is a method in which three sets of heaters are arranged at intervals, the intervals are made to correspond to the intermittent feed amount of the plastic film, and each plastic film is heated three times and heat-sealed. . Therefore, it is only necessary to heat the plastic film for a short time each time the film is intermittently fed, whereby the bag-making machine can be sped up and the bag-making ability can be enhanced.

Therefore, if the plastic film and the spout can be heated and heat-sealed by the two-stage or three-stage sealing system, the heating time per intermittent feeding can be shortened. However, when the plastic film and the spout are intermittently fed and then the respective heaters are pressed against the plastic film and the spout, the positions of the heater and the spout must be perfectly aligned, which is extremely difficult. Further, when manufacturing plastic bags having different sizes, it is necessary to align the heaters each time the size of the plastic bag is changed, which is not easy.

Therefore, with regard to the plastic bag having the spout, the plastic bag and the spout are heat-sealed and fixed to each other in a separate process after the plastic bag is manufactured.

[0011]

An object of the present invention is to efficiently feed a plastic bag having an accessory such as a spout in a bag-making machine for intermittently feeding two layers of plastic film to produce a plastic bag of a certain size by the plastic film. The present invention has been made with the object of making it possible to manufacture the above-mentioned products without any problems of the heating time and the cooling time thereof, the bag-making ability is not deteriorated, and a device having a complicated structure is not required.

[0012]

According to the present invention, in the plastic film feed path, the holder is arranged on the outer side in the width direction of the plastic film, and an accessory such as a spout is held by the holder, and the holder is moved for each intermittent feed of the plastic film. The mechanism operates the holder,
Move and insert the accessory between the two layers of plastic film. Furthermore, at the accessory insertion position,
A pair of ultrasonic sealing heads are arranged on both sides of the plastic film in the stacking direction, and each time the accessory is inserted,
Each ultrasonic sealing head is pressed against the plastic film and accessory, ultrasonic vibration is applied to the plastic film and accessory, and the two layers of plastic film are ultrasonically sealed to the accessory.

Instead of this, the accessory is preheated and supplied to the holder, and the holder moving mechanism moves the holder every intermittent feeding of the plastic film, and the accessory is inserted between the two layers of plastic film. Furthermore, at the accessory insertion position, a pair of pressure members are arranged on both sides in the overlapping direction of the plastic film, and each time the accessory is inserted, the pressure members are pressed against the plastic film and the accessory. Pressurize accessories,
The two layer plastic film may be heat sealed to the accessory.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below.

1 and 2, this is a bag-making machine for producing a plastic bag 1 with accessories.
The plastic bag 1 is for containing a liquid such as a beverage. The accessory consists of a spout 2, which is for pouring the liquid in the plastic bag 1,
It is made of plastic and is commonly used.

FIG. 3 shows the plastic bag 1 containing a liquid. As shown in FIG. 4, the spout 2 is composed of a cap 3 and a base 4, the base 4 has a constant height, is streamlined, and its thickness decreases toward both ends. On the other hand, the plastic bag 1 is of a certain size, has a rectangular shape, has an opening edge 5, a bottom edge 6 and a side edge 7, and forms a hypotenuse 8 between the opening edge 5 and the side edge 7 of the plastic bag 1. The spout 2 is provided on the hypotenuse 8 thereof. Further, an opening edge seal portion 9, a bottom edge seal portion 10 and a side edge seal portion 11 are formed in the plastic bag 1 so that a liquid such as a beverage is contained in the plastic bag 1. Additional seal portions 12 are also formed between the spout 2 and the opening edge seal portion 9 and between the spout 2 and the side edge seal portion 11.

In the bag-making machine shown in FIG. 1, two layers of plastic film 13 are superposed, passed through heaters 14 and 15, slitter 16 and feed roller 17, guided to cutter 18, and intermittently fed. Further, the heater 14 is driven by the driving mechanism for each intermittent feeding, the heater 14 pressurizes and heats the two-layer plastic film 13, and each plastic film 13 is heat-sealed in the longitudinal direction. Therefore, as shown in FIG. 2, the vertical seal line 19 is formed on the plastic film 13. At the same time, with each intermittent feed of the plastic film 13,
The heater 15 is driven by the drive mechanism, the heater 15 pressurizes and heats the two-layer plastic film 13, and each plastic film 13 is heat-sealed in the width direction. Therefore, the plastic film 13
A horizontal seal line 20 is formed on the. Regarding the heater 15, a plurality of sets of heaters 15 are arranged at intervals in the feeding path of the plastic film 13, and the intervals correspond to the intermittent feed amount of the plastic film 13. The heater 14 has a length that is at least twice the intermittent feed amount of the plastic film 13. Therefore, 2 steps or 3
The plastic film 13 is heat-sealed by the step sealing method. After that, the cutter 18 is driven by the drive mechanism each time the plastic film 13 is intermittently fed, and the heat-sealed plastic film 13 is cut in the width direction. As a result, the plastic bag 1 having a certain size is manufactured.

This bag making machine is of a so-called two-row type, and the vertical seal portion 19 is formed at the center position of the plastic film 13 in the width direction. After that, the slitter 16 acts on the plastic film 13, and the plastic film 13 is slit at the center position of the vertical seal portion 19 in the width direction. After slitting, the plastic film 13 forms two rows. Therefore, two plastic bags 13 are sequentially manufactured, and the vertical seal portion 19 of the plastic film 13 forms the bottom edge seal portion 10 of FIG. 3, and the horizontal seal portion 20 forms the side edge seal portion 11 of FIG. It

Further, in this bag-making machine, the holder 21 is arranged outside the width direction of the plastic film 13 in the feeding path of the plastic film 13, and the holder 21 holds the spout 2 by the holder 21. In this embodiment, the holders 21 are provided on the two rows of the plastic films 13, and the holders 21 are arranged on the outer sides of the plastic films 13 in the width direction. Further, at the position indicated by the solid line in FIG. 2, the spout 2 is supplied to the holder 21,
The cap 21 is held by the holder 21. The position is a position downstream of the cutter 18, and the distance from the cutter 18 corresponds to the size of the plastic bag 1. The spout supply mechanism may be of any type. For example, a lifter may be used as the supply mechanism, and the spouts 2 may be sequentially raised or lowered one by one and supplied to the holder 21.

Further, an auto hand is used as the holder moving mechanism, and the auto hand has an arm 22 and a rotary shaft 23. The holder 21 is an automatic hand holder and is supported by the arm 22. The arm 22 extends in the horizontal direction and is fixed to the rotary shaft 23, and the rotary shaft 23 extends in the vertical direction. Further, a cylinder is provided on the arm 22 and is connected to the holder 21, the holder 21 is closed by the cylinder, and the spout 2 is gripped by the holder 21. Furthermore, the lever is the rotating shaft 2.
3, the cylinder is connected to the lever, and as will be described later, the rotary shaft 23 is rotated by the cylinder and the lever, and the arm 22 and the holder 21 are swung and moved at every intermittent feed of the plastic film 13. ,
The spout 2 can be inserted between two layers of plastic film 13.

Further, two rows of plastic film 13
In each of the above, a pair of ultrasonic seal heads 24 are provided, and at the insertion position of the spout 2, the pair of ultrasonic seal heads 24 are arranged on both sides of the plastic film 13 in the stacking direction. Further, the cylinder is connected to the ultrasonic seal head 24, and the ultrasonic seal head 24 is operated by the cylinder to move up and down every intermittent feeding of the plastic film 13. The ultrasonic seal head 24 is of a type that applies ultrasonic vibration, and is a generally known one.

Further, two rows of plastic film 13
In, a pair of punches 25 are provided respectively. The punch 25 is for forming the hypotenuse 8 in FIG. 3, and its position is between the slitter 16 and the feed roller 17 or between the heater 15 and the slitter 16, and is a position close to both side edges of the plastic film 13. Further, the cylinder is connected to the punch 25, and the punch 25 is operated by the cylinder every time the plastic film 13 is intermittently fed so that the punch 25 moves up and down.
In the lateral seal portion 20, the plastic film 13 is punched out at positions close to both side edges thereof, and a notch is formed in the plastic film 13. The notch is triangular and has a hypotenuse 26. This forms the hypotenuse 8 of FIG.

Besides, the vacuum pads 27, 28, 2
9 is provided downstream of the cutter 18. Regarding the vacuum pads 27, a pair of vacuum pads 27 are provided in each of the two rows of the plastic films 13, and the vacuum pads 27 are arranged on both sides of the plastic film 13 in the stacking direction. Further, a cylinder is connected to the vacuum pad 27 so that the vacuum pad 27 can be raised and lowered and closed by the cylinder, and each plastic film 13 can be attracted to the vacuum pad 27. Thereafter, the vacuum pad 27 can be opened by the cylinder to form a gap between the two layers of plastic film 13. The position is between the cutter 18 and the ultrasonic seal head 24,
It is a position close to both side edges of the plastic film 13. On the other hand, the vacuum pad 28 is in the shape of an elongated plate, extends in the width direction of the plastic film 13, and is arranged below the plastic film 13. The position is cutter 18
It is a position close to. Regarding the vacuum pads 29, a pair of vacuum pads 29 are provided in each of the two rows of the plastic films 13, and the vacuum pads 29 are arranged above the plastic film 13. The position is a position corresponding to the ultrasonic seal head 24. Therefore, each plastic film 13 can be adsorbed and fixed to the vacuum pads 28, 29. Further, for example, the vacuum pad 29 is supported by the arm, and after the plastic bag 1 is manufactured, the plastic bag 1 can be discharged by the arm and the vacuum pad 29.

In this bag making machine, when the plastic film 13 is intermittently fed, the holder 21 and the spout 2 stand by at the solid line position in FIG. Then, each time the plastic film 13 is intermittently fed, before the plastic film 13 is cut by the cutter 18, each plastic film 13 is adsorbed and fixed to the vacuum pads 28, 29 at the downstream position thereof. Simultaneously with this or after that, the vacuum pad 27 is closed by the cylinder, and each plastic film 13 is adsorbed to the vacuum pad 27. After that, the vacuum pad 27 is opened by the cylinder to form a gap between the two layers of plastic film 13.

After that, the rotary shaft 23 is operated and rotated by the cylinder and the lever, and the arm 22 and the holder 21 pivot and move to the chain line position in FIG. Therefore, the spout 2 is inserted between the two layers of plastic films 13 each time the plastic film 13 is intermittently fed. The spout 2 is aligned with the hypotenuse 26 of the plastic film 13, its base 4 is inserted between the two layers of plastic film 13, and the cap 3 projects outside the plastic film 13. As described above, the base 4 has a streamlined shape, and its thickness decreases toward both ends. When the base 4 is inserted between the two layers of plastic films 13, the base 4 is inserted from one end thereof. It Therefore, a two-layer plastic film 1
Even if the gap between the three is small, the base 4 can be smoothly inserted without any trouble.

After that, the vacuum pad 27 is closed by the cylinder, the plastic films 13 are overlapped, and the gap is removed. In parallel with this, each ultrasonic sealing head 24 is operated by the cylinder to move up and down, and at the base 4 of the spout 2, each ultrasonic sealing head 24 is pressed against the plastic film 13 and the spout 2. Therefore, the ultrasonic sealing head 24 pressurizes the plastic film 13 and the spout 2 to apply ultrasonic vibration to the plastic film 13 and the spout 2. This causes the plastic film 13 and the spout 2 to internally generate heat,
The two-layer plastic film 13 is ultrasonically sealed and fixed to the spout 2. Further, at the same time, the ultrasonic seal heads 2 are provided on both sides of the base 4 in the longitudinal direction.
4 is pressed against the plastic film 13 and the ultrasonic sealing head 24 causes each plastic film 13
Is ultrasonically sealed. This forms the additional seal portion 12 of FIG.

When the ultrasonic sealing heads 24 are pressed against the plastic film 13 and the spout 2, the upper and lower ultrasonic sealing heads 24 may be pressed simultaneously or alternately. Each ultrasonic sealing head 24 may be pressed only once, or may be pressed twice or three times.

After that, the ultrasonic sealing heads 24 are operated by the cylinders, and the ultrasonic sealing heads 24 are operated.
3 and spout 2 away. Further, thereafter or at the same time, the holder 21 is opened by the cylinder, the spout 2 is released from the holder 21, and the arm 22 is released.
The holder 21 pivots to the solid line position in FIG. 2, separates from the spout 2, and retracts. Then, at the solid line position in FIG. 2, the next spout is supplied to the holder 21,
Is gripped by.

After the ultrasonic sealing or in parallel with the ultrasonic sealing, the cutter 18 is driven by the driving mechanism to cut each plastic film 13 in the width direction, whereby the plastic bag 1 having the spout 2 is manufactured. After that, the plastic bag 1 is released from the suction pads 27 and 28, and each plastic bag 1 is discharged by the arm and the suction pad 29.

Then, each time the plastic film 13 is intermittently fed, the respective steps are sequentially and alternately repeated to produce the spout 2
The plastic bag 1 having the above is manufactured continuously. Then, a liquid such as a beverage is contained in the plastic bag 1, and the opening edge 5 is heat-sealed by the heat-sealing device to form the opening-edge sealing portion 9. As a result, the plastic bag 1 shown in FIG. 3 is obtained.

Therefore, in the case of this bag-making machine, not the heater but the ultrasonic sealing head 24 is pressed against the plastic film 13 and the spout 2. Therefore, ultrasonic vibration is applied to the plastic film 13 and the spout 2, whereby the plastic film 13 and the spout 2 internally generate heat and are ultrasonically sealed. The heater does not heat the plastic film 13 and the spout 2 to heat-seal them, and the required time is short. Moreover, the plastic film 13 and the spout 2 only internally generate heat, and when the ultrasonic sealing head 24 separates from the plastic film 13 and the spout 2, it is not necessary to cool it.
No cooling time is required. Therefore, the plastic film 13 and the spout 2 can be fixed to each other in a short time, and then the holder 21 can be separated from the spout 2 and retracted to support the spout 2 by the plastic film 13. Therefore, after that, the plastic film 13 is intermittently fed, and in parallel with this, the plastic bag 1 can be discharged by the suction pad 29. Therefore, the plastic bag 1 having the spout 2 can be efficiently manufactured, and the bag-making ability of the bag-making machine does not decrease. Moreover, when the plastic film 13 is intermittently fed and the plastic bag 1 is discharged by the suction pad 29, it is not necessary to synchronize the holder 21 with the plastic film 13 or the plastic bag 1 and move the holder 21 in the feeding direction or the discharging direction. No equipment of different configurations is required.

FIG. 5 shows another embodiment. In this bag-making machine, as shown in FIG. 6, the holder 21 and the ultrasonic seal head 24 are not located at the downstream position of the cutter 18, but the heater 1
The spout 2 is provided at upstream positions of 4 and 15, and the holder 21 holds the spout 2. Further, a punch 25 is provided at a position upstream of the ultrasonic seal head 24, and
0 is placed between the punch 25 and the ultrasonic sealing head 24, and is inserted between the two layers of plastic film 13. Therefore, each time the plastic film 13 is intermittently fed, the punch 25 causes the plastic film 13 to reach each plastic film 13.
Is punched out to form a hypotenuse 26 on the plastic film 13. Then, the plastic film 13 is guided to the rod 30, and a gap is formed between the two layers of plastic film 13.

Thereafter, each time the plastic film 13 is intermittently fed, the spout 2 has a two-layer plastic film 1
3, the plastic film 13 and the spout 2 are ultrasonically sealed and fixed by the ultrasonic sealing head 24. After that, each time the plastic film 13 is intermittently fed, each plastic film 13 is heat-sealed by the heaters 14 and 15, the vertical seal portion 19 and the horizontal seal portion 20 are formed on the plastic film 13, and each plastic film 13 is cut by the cutter 18. Be disconnected. As a result, the plastic bag 1 having the spout 2 is manufactured.

Therefore, also in the bag-making machine shown in FIG. 5, the plastic film 13 and the spout 2 are ultrasonically sealed by the ultrasonic sealing head 24 as in the case of the bag-making machine shown in FIG. . Therefore, after that, the holder 21 can be separated from the spout 2 and retracted, the spout 2 can be supported by the plastic film 13, this can be intermittently fed, and the plastic bag 1 can be discharged by the suction pad 29. Therefore, the plastic bag 1 having the spout 2 can be efficiently manufactured, and the bag-making ability of the bag-making machine does not decrease.

Holder 21 and ultrasonic seal head 24
May be arranged between the heaters 14 and 15 and the cutter 18.
The holder 21 and the ultrasonic seal head 24 are attached to each heater 1.
It is also possible to arrange between 4 and 15.

Instead of using the ultrasonic sealing head 24, the spout 2 may be heated in advance and supplied to the holder 21. FIG. 7 shows an example thereof. In this bag making machine, the heating tunnel 31 is used as a heating means, the spout 2 is supplied by the conveyor 32, and the spout 2 is pushed into the heating tunnel 31 one by one at every intermittent feeding of the plastic film 1. Heating tunnel 3
1 and the conveyor 32 extend along the feeding path of the plastic film 13, and the arm 22 and the holder 21 pivot to the tip position of the heating tunnel 31 and stand by at that position. Therefore, the spout 2 is heated by the heating tunnel 31.
Is heated, and after heating, the spout 2 is supplied to the holder 21, and the holder 21 grips the spout 2. After that, each time the plastic film 13 is intermittently fed, the arm 22 and the holder 21 are operated, swung, and moved by the cylinder, and the spout 2 is inserted between the two layers of plastic film 13.

Further, at the insertion position of the spout 2,
A pair of pressing members 33 are arranged on both sides of the plastic film 13 in the stacking direction, and each pressing member 33 is pressed against the plastic film 13 and the spout 2 every time the spout 2 is inserted. Therefore, the pressing member 33 pressurizes the plastic film 13 and the spout 2, and the two-layer plastic film 13 is heat-sealed to the spout 2. The spout 2 is preheated, and it is not necessary to heat it again. It suffices to press the pressure member 33 against the plastic film 13 and the spout 2 without heating, and press the plastic film 13 and the spout 2 by the pressure member 33, thereby heat sealing the plastic film 13 and the spout 2. be able to.

Therefore, the heating time of the plastic film 13 and the spout 2 after the insertion of the spout 2 is not required. Furthermore, the pressing member 33 can be pressed against the plastic film 13 and the spout 2, and then the plastic film 13 and the spout 2 can be cooled as they are, and both can be fixed in a short time. Therefore, the pressing member 33 and the holder 21 are separated from the plastic film 13 and the spout 2 and retracted,
The plastic film 13 can be intermittently fed. Therefore, the plastic bag 1 having the spout 2 can be efficiently manufactured, and the bag-making ability of the bag-making machine does not decrease.

In the bag making machine of FIGS. 8 and 9, a plurality of heating cases 34 are used as heating means. The heating case 34 is of a turret type, is provided around a horizontal axis 35, is arranged at a predetermined angular interval, and has an arm 36.
It is supported by. Further, a magazine 37 and a pusher 38 are provided on one side in the horizontal direction of the turret structure, the spout 2 is accommodated in the magazine 37, and the holder 21
Turns to the other side of the turret structure in the horizontal direction, moves, and waits at that position. Furthermore, the plastic film 13
For each intermittent feed, the heating case 34 and the arm 36 rotate about the horizontal axis 35 at an angle corresponding to the angular interval, and perform an indexing motion, and the pusher 38 pushes out the spout 2 to the heating case 34. Is inserted. Therefore, in each heating case 34, the spouts 2 are sequentially inserted one by one, and the spouts 2 are heated by the heating case 34, which is the holder 21.
Will be supplied to. Further, it is gripped by the holder 21, and each time the plastic film 13 is intermittently fed, the arm 22 and the holder 21 are swung and moved by the cylinder, and the spout 2 is inserted between the two layers of plastic film 13.

Thereafter, each time the spout 2 is inserted, the pressure members 33 are pressed against the plastic film 13 and the spout 2. Therefore, the pressing member 33 pressurizes the plastic film 13 and the spout 2, and the two-layer plastic film 13 is heat-sealed to the spout 2.

Not only the spout 2 but also the plastic bag having other accessories can be applied to the bag making machine to manufacture the plastic bag having other accessories by the bag making machine.

[0042]

As described above, according to the present invention, two sealing methods are provided as a sealing method for the plastic film 13 and the spout 2, and in one sealing method, the spout 2 has a two-layer plastic film 13.
Inserted in between, the plastic film 13 and the spout 2 are ultrasonically sealed by the ultrasonic sealing head 24. In the other sealing method, the spout is preheated, is inserted between the two layers of plastic film, and the plastic film 13 and the spout 2 are heat-sealed by the pressing member 33. Therefore, in either case, the plastic film 13 and the spout 2 can be fixed in a short time. Therefore, after that, the holder 2
The spout 2 can be supported by the plastic film 13, and the plastic film 13 can be intermittently fed.
Therefore, the plastic bag 1 having the spout 2 can be efficiently manufactured, and the bag-making ability of the bag-making machine does not decrease. When the plastic film 13 is intermittently fed, it is not necessary to synchronize the holder 21 with the plastic film 13 and move it in the feeding direction, a device having a complicated structure is not required, and the initial purpose can be achieved. is there.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a plan view of the bag making machine of FIG.

FIG. 3 is a side view of a plastic bag having a spout.

FIG. 4 is a perspective view of the spout of FIG.

FIG. 5 is a side view showing another embodiment.

FIG. 6 is a plan view of the bag making machine of FIG.

FIG. 7 is a plan view showing another embodiment.

FIG. 8 is a plan view showing another embodiment.

9 is a side view of the heating case of FIG.

[Explanation of symbols]

 1 Plastic Bag 2 Spout 13 Plastic Film 21 Holder 22 Arm 23 Rotating Shaft 24 Ultrasonic Seal Head 31 Heating Tunnel 33 Pressing Member 34 Heating Case

Claims (2)

[Claims] 1. A bag-making machine for intermittently feeding a two-layered plastic film to produce a plastic bag of a certain size by the plastic film, wherein the plastic film is fed in the feeding path of the plastic film. A holder that is arranged on the outer side in the width direction and holds an accessory such as a spout; a holder moving mechanism that moves the holder for each intermittent feed of the plastic film and inserts the accessory between the two layers of plastic films; In the insertion position of the accessory, it is arranged on both sides of the plastic film in the stacking direction, is pressed against the plastic film and the accessory for each insertion of the accessory, and applies ultrasonic vibration to the plastic film and the accessory, A bag-making machine comprising: a pair of ultrasonic sealing heads for ultrasonically sealing the two-layer plastic film to the accessory. 2. A bag-making machine for intermittently feeding a two-layered plastic film to manufacture a plastic bag of a certain size by the plastic film, wherein the plastic film is fed in the feeding path of the plastic film. A holder that is arranged on the outer side in the width direction and holds an accessory such as a spout, a heating unit that preheats the accessory and supplies the holder, and the holder is moved for each intermittent feed of the plastic film, and the accessory A holder moving mechanism for inserting between the two layers of plastic films, and arranged on both sides of the plastic film in the stacking direction at the accessory insertion position, and pressed against the plastic film and the accessory each time the accessory is inserted. From , Bag-making machine, characterized in that said plastic film and said accessory pressurized, and a pair of pressure member to heat-sealing to the accessory plastic film of the second layer.