JP2017128368A - Bag making and packaging machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vertical bag making, filling, packaging machine that can improve the quality of a bag body while enhancing versatility in order to enable manufacture of various bag bodies, by enabling detection of an end seal and biting of a bag body having different widthwise thickness or asymmetrical shape when film is end-sealed.SOLUTION: A bag making and packaging machine 1 comprises an end sealer 4 including an opening/closing device 21. The opening/closing device has: first and second drive motors 26a, 26b arranged on both widthwise ends of a traveling path 5 of a sealer unit 18; and first and second link mechanisms 27a, 27b connecting the first and second drive motors and the sealer unit 18, and configured to bring sealing members 16, 17 into contact with each other and separate them in contact and separate directions through drive of the first and second drive motors. The end sealer comprises first control means 40a that drives and controls the first drive motor, and second control means 40b that drives and controls the second drive motor.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a bag making and packaging machine for filling a bag body with an article to be packaged.

  A vertical bag making and filling machine, which is an example of a bag making and packaging machine, drops an article to be packed into a vertical cylindrical filling cylinder and fills the bottom sealed cylindrical film with the article to be packaged. (For example, see Patent Document 1). The film descending along the filling cylinder is center-sealed in the vertical direction by a center sealer, which is a vertical sealer, so that the cylindrical film is formed. An end sealer, which is a horizontal sealer, is provided below the filling cylinder.

The end sealer end-seals the cylindrical film fed from the lower side of the filling cylinder in the horizontal direction to form a bag body filled with an article to be packaged.
The end sealer of Patent Document 1 includes an opening / closing device in which one crankshaft is rotated by one drive motor, and a crank arm connected to the crankshaft is tilted up and down. This opening / closing device seals the tubular film in the horizontal direction by opening and closing a sealer unit composed of each sealing member such as an opposing heater block and separating and contacting each sealing member.

JP 2006-182424 A

  Since the end sealer opening and closing device of Patent Document 1 operates by rotating one crankshaft by one drive motor, the cylindrical film cannot be end-sealed with different sealing pressures in the width direction. In this case, a tubular film in which the thickness in the width direction is different or asymmetrical, such as a tubular film in which the center seal portion is formed to be shifted to one side in the width direction, or a tubular film in which a gusset is formed only on one side. The lateral seal cannot be performed properly. In this case, only a limited-sized bag body having a symmetrical shape in the width direction can be manufactured, and the end sealer and thus the versatility of the bag making and packaging machine is lacking.

In addition, in the opening / closing device that rotates one crankshaft by one drive motor, even if the seal member bites only on one side in the width direction, it cannot be detected, so the quality of the bag body is reduced. There is also a risk.
The present invention is based on the above-described prior art, and enables end-seal and bite detection of a bag body having a different thickness in the width direction or an asymmetric shape when end-seal is performed on a film. An object of the present invention is to provide a bag making and packaging machine capable of improving the quality of a bag body while enhancing versatility so that various bag bodies can be manufactured.

  In order to achieve the above object, in the present invention, a bag-making package is formed in which a film is drawn out along a traveling path along which a film to be bagged travels, and is formed into a tubular film, and a packaged product is packaged in the tubular film. An end sealer for end-sealing a tubular film in the width direction of the travel path to form a bag body, the end sealer including a pair of seal members disposed facing each other across the travel path A unit and an opening / closing device that opens and closes the sealer unit so that the pair of sealing members are separated from and connected to each other via the tubular film. The opening / closing devices are arranged on both sides of each sealing member in the width direction. The first and second drive motors are connected to the first and second drive motors and the sealer unit on both sides in the width direction of the respective seal members. And an end sealer that controls the drive of the first drive motor, and a first control unit that controls the drive of the first drive motor. A vertical bag making and filling machine further comprising a second control means.

  Preferably, the end sealer detects a load of the first drive motor or a rotational position or both the load and the rotational position of the sealer unit when the opening / closing device is closed. First determination means for determining the presence or absence of biting and the second drive motor of the sealer unit by detecting the load of the second drive motor or the rotational position or both the load and the rotational position when the opening / closing device is closed. And a second determination means for determining whether or not the packaged object in the side region is bitten.

  According to the present invention, when performing end sealing on the film, it is possible to end seal the bag body that is asymmetric in the width direction, and to detect the biting of different regions in the width direction of the seal member, The quality of the bag can be improved while enhancing the versatility so that various bags can be manufactured.

It is a schematic perspective view of the vertical bag making filling packaging machine concerning one embodiment of the present invention. It is a schematic perspective view of a horizontal sealer. It is a schematic plan view of a horizontal sealer and its control device when the sealer unit is opened. It is a schematic plan view of a horizontal sealer and its control device when the sealer unit is closed.

Hereinafter, a vertical bag making and filling machine 1 as an example of a bag making and packaging machine according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the vertical bag making filling and packaging machine 1 includes a filling cylinder 2, a vertical sealer 3, and a horizontal sealer (end sealer) 4. Further, on the outer side (left side in FIG. 1) of the vertical bag making filling and packaging machine 1, operating devices (not shown) such as switches operated by an operator and a touch panel display are arranged. The filling cylinder 2 is formed in a vertical cylindrical shape. Above the filling cylinder 2, a hopper (not shown) for loading an article to be packaged is provided. The article to be packaged is put into the filling cylinder 2 via the hopper and falls inside the filling cylinder 2 (arrow A).

  A former 6 is provided outside the upper portion of the filling cylinder 2. The former 6 guides the belt-like film f so as to surround the filling cylinder 2 to form a cylinder. The film f travels along the travel path 5 from the reel 7 via a plurality of rollers 8 a to 8 e and is fed to the former 6. Specifically, in the traveling route 5, the film f is fed out while being wound around the plurality of rollers 8a to 8e. Thereafter, the film f is formed into a cylinder shape so as to cover the outer periphery of the filling cylinder 2 by the former 6, and both side edges thereof are overlapped with each other in the form of a palm.

  The filling cylinder 2 is provided with a feeding device 9 as a feeding means for the film f. The feeding device 9 has a pair of endless feeding belts 10. These feeding belts 10 are fed downward along the filling cylinder 2 while adsorbing the film f by a suction unit (not shown).

  A vertical sealer 3 is disposed near the filling cylinder 2 and below the former 6. The vertical sealer 3 is an ultrasonic type, and has an anvil 11 and a horn 13 that are disposed to face each other via a travel path 5 in the horizontal direction. The horn 13 vibrates at a predetermined frequency. The vertical sealer 3 is formed in a cylindrical shape around the outer periphery of the filling cylinder 2, and both side edges of the cylindrical film f rolled out along the longitudinal direction of the filling cylinder 2 are overlapped with the anvil 11 and the horn 13. It is sandwiched between and heat-sealed (vertical seal, center seal) in the vertical direction and bonded to form a tubular film fc.

  A horizontal sealer 4 is disposed below the filling cylinder 2. The horizontal sealer 4 is of an ultrasonic type, and the horizontal sealer 4 includes a sealer unit 18 including an anvil (seal member) 16 and a horn (seal member) 17 that are opposed to each other with the travel path 5 interposed therebetween, and a horn 17. And a vibration element 19 that vibrates.

  The horizontal sealer 4 adheres the cylindrical film fc fed from the lower end of the filling cylinder 2 by heat sealing (horizontal sealing, end sealing) in the horizontal direction. At this time, the horizontal sealer 4 moves up and down as shown by arrows in FIG. 1 through elevating bearings 20a and 20b, which will be described later. The bag body 12 is manufactured after being sealed and cut. At this time, the lower side of the cut portion in the horizontal seal forms the top of the bag body 12 in the previous bag making process, and the upper side of the cut portion forms the bottom of the bag body 12 in the current bag making process.

  As shown in FIG. 2, the horn 17, the booster 22, and the one vibration element 19 are connected in series in the separation / contact direction X in order from the anvil 16 side to form a horn unit 25. The vibration element 19 is vibrated by a command from the oscillation control unit 39 (see FIG. 3). The vibration element 19 converts high-frequency electrical energy into mechanical vibration energy. The mechanical vibration energy is amplified by the booster 22, and then the cylindrical film fc is welded through the horn 17.

Further, the horizontal sealer 4 includes an opening / closing device 21 that opens and closes the sealer unit 18 so that the anvil 16 and the horn 17 are separated from each other in the horizontal separation / contact direction X via the tubular film fc.
As shown in FIG. 3, the opening / closing device 21 includes a horn unit 25, first and second drive motors 26a and 26b, and first and second link mechanisms 27a and 27b. The first and second drive motors 26a and 26b and the first and second link mechanisms 27a and 27b are respectively provided on both sides in the horizontal direction of the horn unit 25 (that is, on both sides in the width direction of the travel path 5) with the sealer unit 18 as a reference. They are arranged in line symmetry.

  The first and second link mechanisms 27a and 27b connect the first and second drive motors 26a and 26b and the sealer unit 18 respectively, and the anvil 16 and the horn 17 are driven by the first and second drive motors 26a and 26b. Are separated from each other in the horizontal separation direction X.

The opening / closing device 21 further includes a first slide bar 28, a second slide bar 29, a third slide bar 30, a pair of first and second slide rods 31a and 31b, and a base plate 36 (see FIG. 2). Yes.
Specifically, the first slide bar 28 extends in an intersecting direction Y (for example, an orthogonal direction) intersecting with the separation / contact direction X, and is connected to the horn unit 25 and constitutes first and second link mechanisms 27a and 27b, which will be described later. One end of each of the first links (one end) 32a, 32b is slidably connected.

  The second slide bar 29 extends in the intersecting direction Y and the anvil 16 is fixed. The third slide bar 30 extends in the intersecting direction Y, and one end of second links (other ends) 33a and 33b, which will be described later, constituting the first and second link mechanisms 28 and 29 is swingably connected. An insertion hole 30 a passes through the center of the third slide bar 30 in the longitudinal direction. The horn 17 is inserted through the insertion hole 30a in the separation / contact direction X as the sealer unit 18 is opened and closed.

  The base plate 36 is attached with the first and second drive motors 26a and 26b, and supports the first and second slide rods 31a and 31b to be slidable in the contact / separation direction X. The first and second slide rods 31a and 31b extend in the separation / contact direction X and support both ends of the second and third slide bars 29 and 30, respectively. These first to third slide bars 28, 29, and 30 all slide in the contact / separation direction X as the sealer unit 18 opens and closes. Further, the first and second slide rods 31 a and 31 b slide in the separation / contact direction X in accordance with the opening / closing operation of the sealer unit 18, and come into and out of contact with the first slide bar 28.

The first and second link mechanisms 27a and 27b are respectively composed of the first links 32a and 32b and the second links 33a and 33b and the levers 34a and 34b.
Specifically, the output shafts of the first and second drive motors 26a and 26b are connected to the central portions of the levers 34a and 34b, respectively.

  One end of each of the second links 33a and 33b is pivotably connected to one end of each of the levers 34a and 34b. The third slide bar 30 is swingably connected to the other ends of the second links 33a and 33b. First and second slide rods 31 a and 31 b are connected to the third slide bar 30. A second slide bar 29 is connected to the first and second slide rods 31 a and 31 b, and the anvil 16 is fixed to the second slide bar 29.

  On the other hand, one end portions of the first links 32a and 32b are swingably connected to the other end portions of the levers 34a and 34b. The first slide bar 28 is swingably connected to the other ends of the first links 32a and 32b. The horn unit 25 is connected to the first slide bar 28.

  The first links 32a and 32b and the second links 33a and 33b are link members that are line symmetrical with respect to the horn unit (or sealer unit 18) 25 on both sides in the horizontal direction of the horn unit 25 (or sealer unit 18). The levers 34a and 34b are link members having the same shape. These line-symmetrical or identical-shaped link members constituting the first and second link mechanisms 27a and 27b are arranged and connected line-symmetrically with respect to the horn unit 25 on both sides in the horizontal direction of the horn unit 25. .

  As a result, the first and second link mechanisms 27a and 27b have a line-symmetric shape as a whole with respect to the horn unit 25 on both sides of the horn unit 25 in the horizontal direction. The first and second drive motors 26 a and 26 b are also arranged at positions that are line-symmetric with respect to the horn unit 25 on both sides of the horn unit 25 in the horizontal direction.

  The first and second slide rods 31a and 31b have buffer portions 35a and 35b that can come into contact with the first slide bar 28 as the sealer unit 18 opens and closes at one end on the first slide bar 28 side, respectively. ing. The buffer portions 35a and 35b have a cylindrical shape in which the separation / contact direction X is the radial direction, and are formed of an elastic member.

As shown in FIG. 2, the base plate 36 is provided with bearing portions 37a and 37b and the above-described elevating bearing portions 20a and 20b.
The bearing portions 37a and 37b support the first and second slide rods 31a and 31b so as to be slidable in the separation / contact direction X, respectively.
The elevating bearing portions 20a and 20b extend in the vertical direction Z, and the horizontal sealer 4 is indicated by an arrow in FIG. 1 by an elevating device (not shown) that slidably supports the elevating bearing portions 20a and 20b with a rod (not shown). The opening / closing device 21 opens and closes the sealer unit 18 while moving up and down as described above, whereby the bag body 12 is formed from the tubular film fc that is sequentially fed to the travel path 5.

  Hereinafter, the opening / closing operation of the sealer unit 18 by the opening / closing device 21 will be described in detail with reference to FIGS. The sealer unit 18 includes a control device 38, and the control device 38 is electrically connected to the first and second drive motors 26 a and 26 b and the vibration element 19. The control device 38 includes an oscillation control unit 39 to which the vibration element 19 is connected, a first drive motor control unit (first control means) 40a to which the first drive motor 26a is connected, and a first drive motor 26b to which the second drive motor 26b is connected. 2-drive motor control section (second control means) 40b, first engagement determination section (first determination means) 42a connected to the first drive motor 26a, and second engagement determination connected to the second drive motor 26b Part (second determination means) 42b.

  The opening / closing device 21 individually controls the drive of the first and second drive motors 26a and 26b in response to commands from the first and second drive motor control units 40a and 40b, and controls the levers 34a and 34b in the directions of the arrows in FIG. Rotate to By the rotation of the levers 34a and 34b, the first links 32a and 32b are moved to the horn 17 side, and accordingly, the first slide bar 28 is pulled in the direction of the arrow in FIG. 3 (the direction of the third slide bar 30 side). Then, the state shown in FIG. 4 is obtained.

  On the other hand, due to the rotation of the levers 34a and 34b, the second links 33a and 33b move to the first slide bar 28 side, and accordingly, the third slide bar 30 moves in the direction of the arrow in FIG. 3 (the first slide bar 28 side). 4), the state shown in FIG. 4 is obtained. The third slide bar 30 is connected to the first and second slide rods 31 a and 31 b, and the first and second slide rods 31 a and 31 b are connected to the second slide bar 29.

  Accordingly, the second and third slide bars 29 and 30 and the first and second slide rods 31a and 31b are integrated with each other in accordance with the opening / closing operation of the sealer unit 18, and the directions of the arrows in FIG. Slide in the direction of 1 slide bar 28). At this time, the first and second slide rods 31a and 31b are pressed against the first slide bar 28 by the buffer portions 35a and 35b. At the time of pressing, the shock-absorbing force is absorbed by the buffer portions 35a and 35b being curved in the radial direction.

  As described above, when the opening / closing device 21 is used to open and close the sealer unit 18 and the center position C of the tubular film fc shown in FIG. 3 is used as a reference, as shown in FIG. The horn 17 is pulled to a position where it comes into contact with the fc, and the horn 17 is completely pulled out from the insertion hole 30a of the third slide bar 30 and is brought into contact with the tubular film fc. Is done.

  After the end of the horizontal sealing of the tubular film fc, the first and second drive motors 26a and 26b are driven by a command from the control device 38, and the levers 34a and 34b rotate in the direction opposite to the direction of FIG. Rotate in the direction of the arrow. By the rotation of the levers 34a and 34b, the first links 32a and 32b are moved to the opposite side of the horn 17, and the first slide bar 28 is moved in the direction of the arrow in FIG. It is pushed and it will be in the state of FIG.

  On the other hand, due to the rotation of the levers 34a and 34b, the second links 33a and 33b move to the opposite side of the first slide bar 28. Accordingly, the third slide bar 30 moves in the direction indicated by the arrow in FIG. 3), the state shown in FIG. 3 is obtained. In this way, the second and third slide bars 29 and 30 and the first and second slide rods 31a and 31b are integrated with the opening / closing operation of the sealer unit 18, and the directions of the arrows in FIG. Slide in the direction opposite to the bar 28).

  As a result, when the center position C of the tubular film fc shown in FIG. 4 is used as a reference, the anvil 16 is moved to a position away from the tubular film fc as shown in FIG. It moves to a position away from the tubular film fc until it is positioned in the insertion hole 30a of the slide bar 30, and enters a standby state for the next horizontal seal of the tubular film fc that is sequentially fed out.

  Here, the first and second drive motors 26a and 26b are individually driven and controlled by the first and second drive motor control units 40a and 40b. Therefore, the cylindrical film fc in which the vertical seal portion is formed to be shifted to one side in the width direction, the cylindrical film fc in which the gusset is formed only on one side, or the like, the cylindrical film having a different thickness in the width direction or an asymmetric shape. When performing the horizontal seal of fc, the first and second drive motor control units 40a and 40b cause the cylindrical film fc to have a difference in driving force between the first and second drive motors 26a and 26b. Appropriate lateral sealing with different pressing forces (seal pressure) in the width direction.

  In addition, the first biting determination unit 42a detects the load and rotation position of the first drive motor 26a when the opening / closing device 21 is closed, thereby detecting the load in the region of the sealer unit 18 on the first drive motor 26a side. Determine if the package is bitten. In addition, the second biting determination unit 42b detects the load and rotation position of the second drive motor 26b when the opening / closing device 21 is closed, thereby detecting the load in the region of the sealer unit 18 on the second drive motor 26b side. Determine if the package is bitten.

  As described above, in the opening / closing device 21 of the horizontal sealer 4 of the present embodiment, the first and second drive motors 26a and 26b are individually driven and controlled by the first and second drive motor control units 40a and 40b. For this reason, the cylindrical film fc can be properly laterally sealed with different pressing forces (seal pressure) in the width direction. Therefore, it is possible to realize a highly versatile vertical bag making and filling machine 1 capable of manufacturing various bag bodies.

  Further, the link members of the first links 32a and 32b, the second links 33a and 33b, and the levers 34a and 34b constituting the first and second link mechanisms 27a and 27b are provided with the sealer unit 18 on both sides in the horizontal direction of the sealer unit 18. They are arranged and connected in line symmetry as a reference. Accordingly, the second link mechanisms 27a and 27b have a line-symmetric structure as a whole with respect to the sealer unit 18 on both sides in the horizontal direction of the sealer unit 18. Accordingly, since the force acting in the cross direction Y is canceled by the sealer unit 18, it is prevented that the anvil 16 and the horn 17 are twisted at the time of contact, or the horizontal seal portion in the tubular film fc is shifted and becomes unbalanced. However, it is possible to manufacture a high-quality bag body 12 with an appropriate lateral seal.

  Further, since the first and second biting determination units 42a and 42b can detect biting of only one region of the sealer unit 18, the biting detection of the package can be performed with high accuracy. The quality of the body 12 can be improved.

This is the end of the description of the embodiment of the present invention. However, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the present invention.
For example, the opening / closing device 21 includes first and second link mechanisms 27a and 27b, first to third slide bars 28, 29, and 30 and first and second slide rods 31a and 31b that are linked to the first and second link mechanisms 27a and 27b. Of course, the configuration is not limited to the above-described embodiment, and various mechanisms are conceivable.

  Further, the sealer unit 18 of the horizontal sealer 4 is not limited to the ultrasonic type, and may be a sealer unit such as a pair of heater blocks or an impulse sealer.

  The present invention is not limited to the vertical bag making and filling machine 1, but can also be applied to a horizontal bag making and packaging machine. In this case, the film fed from a plurality of rollers is folded in the width direction of the travel path by the former while the film is traveled on the horizontal travel path, and the package is wrapped. Then, after sealing both ends of the folded film with a center sealer, the film is sealed with an end sealer and cut to produce pillow-shaped bags one after another.

1 Vertical bag making filling and packaging machine 4 Horizontal sealer (end sealer)
5 Traveling path 12 Bag 16 Anvil (seal member)
17 Horn (seal member)
18 Sealer unit 21 Opening / closing device 25 Horn unit 26a First drive motor 26b Second drive motor 27a First link mechanism 27b Second link mechanism 40a First drive motor control section (first control means)
40b Second drive motor control section (second control means)
42a First biting determination unit (first determination means)
42b 2nd biting determination part (2nd determination means)
f Film fc Cylindrical film

Claims (2)

A bag making and packaging machine for forming a tubular film while drawing out the film along a traveling path along which a film to be bagged travels, and packaging an article to be packaged in the tubular film,
An end sealer for end-sealing the tubular film in the width direction of the travel path to form a bag body;
The end sealer is
A sealer unit including a pair of seal members disposed opposite to each other across the travel route;
An opening and closing device that opens and closes the sealer unit so that the pair of seal members are separated from and connected to each other via the tubular film in the direction of separation and connection.
The switchgear is
First and second drive motors disposed on both sides in the width direction of the sealer unit;
The first and second drive motors and the sealer unit are connected to both sides of the sealer unit in the width direction, and the seal members are connected to each other in the separation / contact direction by driving the first and second drive motors. A first and a second link mechanism to be separated from each other;
The end sealer is
First control means for driving and controlling the first drive motor;
A bag making and packaging machine, further comprising second control means for driving and controlling the second drive motor. The end sealer is
When the opening / closing device is closed, the load of the first drive motor or the rotational position or both the load and the rotational position is detected to detect the packaged object in the region on the first drive motor side of the sealer unit. First determination means for determining the presence or absence of biting,
When the opening / closing device is closed, the packaged object in the region of the sealer unit on the second drive motor side is detected by detecting the load or rotation position of the second drive motor or both the load and the rotation position. The bag making and packaging machine according to claim 1, further comprising: a second determination unit that determines whether or not biting occurs.

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