JPH0516906A - Film type packaging method and packaging apparatus therefor - Google Patents

Abstract

PURPOSE:To make packaging treatment with stretched film executable at a high speed in highly functional means, and to miniaturize a packaging apparatus therefor so that it can be used for packaging of small-sized articles. CONSTITUTION:Film is stretched out of a film tensioning device 40 fixed to a rotary drum 30, and the front end of the stretched film is gripped with a gripper 20. When the film is wrapped round a packaging object, the gripper is evacuated from the position of rotatory track of the rotary drum with the front end of the film being gripped therewith. After the film is wrapped round the packaging object by rotating the rotary drum several times, the gripped front end of the film is blown back to the position of the rotatory track of the rotary drum by means of a film front end-blowing back device 50 and is wound into the turned-around film. After that, the film is cut and the rear end of the cut film is stuck to the wrapped-around film with a film terminal treatment device 60, and thereby wrapping-round of the packaging object is completed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film type packing method for tightly winding a stretch film on a comparatively small and long package, and a packing apparatus therefor.

[0002]

2. Description of the Related Art Recently, using a stretch film,
Stretch wrapping machines, which are mainly pallet stretch wrapping machines, are gradually being developed. However, conventional stretch film wrapping equipment places a large number of loads on pallets that are mainly used for cargo handling work, and wraps the loads on these pallets together with banding work to wrap the whole with a stretch film. Moreover, the entire device was quite large. For this reason, there is a problem that it is difficult to introduce it into a relatively small factory or a packing work of a compact packing material. Therefore, in such a case, a banding machine with an arch, which has been generally used conventionally, was mainly used, but depending on the shape and packing form of the packaged product, the binding state may not be satisfactory. There wasn't. Further, recently, a small stretch film packaging machine is being developed, but the function is still unfinished in many cases.

[0003]

DISCLOSURE OF THE INVENTION The present invention provides a stretch film machine which is under the above-mentioned circumstances, downsized, speeded up, so that it can be used in any packaging field like a general banding machine. It is intended to be highly functional.

[0004]

The present invention takes the following means in order to solve the above problems. A first invention, which is going to receive a patent, is a method of packing a package on a table with a film by a rotary orbiting operation of a rotary drum, and retracting a gripper gripping a film tip from a rotary orbital position of the rotary drum. After rotating the rotating drum, the leading end of the film is returned to the position of the rotating orbit of the rotating drum so that the package is wrapped between the rotating films. The invention of this method is to loosen the film with respect to the package by retracting the gripper that grips the tip of the film from the position of the orbit of rotation of the rotary drum when the film is wound around the package while the rotary drum orbits. It is a packaging method that finishes the treatment of the film tip cleanly because it can be tightened without any trouble and the film tip is wound around the film.

A second invention to be patented is a method of packing a film on a table by a rotary orbiting operation of a rotary drum, in which a gripper gripping a film tip is used for a rotary orbit of the rotary drum. After retracting from the position and orbiting the rotary drum several times, the film front end is returned to the rotary orbital position of the rotary drum by the film front end returning device and wound between the revolving films.
After that, the trailing end of the film is cut, and the trailing end of the film cut by the film terminal processing device is brought into close contact with the revolving film to pack the packaged item.

First, the film grip mechanism and the cutter mechanism are integrally formed, and the film grip tip returning device and the film terminal processing device are operated so as to synchronize with the operation of the integrally formed gripper. It was done. Secondly, the above-mentioned gripper retreats from the loop orbit from the beginning of winding the film to eliminate looseness of the winding of the film. Thirdly, since the film grip end and the film cut end are treated with compressed air, respectively, the finished product in a packed state becomes good.

A third invention for obtaining a patent is the method of the second invention, wherein a plurality of packages are packed with at least one film interposed between them. The film is wrapped around the item to be packed. In this case, after wrapping the film around one package, stop the rotating drum,
Another package is placed on the table and the film winding operation is restarted to package a plurality of packages.

By performing the packing operation by the above method, it is possible to prevent the occurrence of scratches between a plurality of packages even if the packages are misaligned. Further, at this time, by winding the film in a spiral shape, there is an effect of preventing the occurrence of scratches in the case of packing a long product.

A fourth invention to be granted a patent is an invention of a packing apparatus used in the invention of the above method, and a table on which a packaged object to be packed is placed and a film tip is gripped on the lower part of the table. In addition, a gripper that integrally forms a cutter that cuts the film, a rotating drum that circulates around the package on the table, and a film tension that is fixed to the rotating drum and stretches the film tip around the package and winds it. Device, a film grip tip blowback device fixed to a gripper arranged at the lower part of the table, and a film terminal processing device fixed to the gripper, and the gripper is a rotating drum while gripping the film tip. It is provided so that it can be retracted from the rotating orbiting position, and the film is packed by rotating the rotating drum several times. When the film is wrapped around, the gripping force of the gripped film front end is released to operate the film front end blowback device, and the film end processing device is operated after cutting the film rear end by the cutter part. .

A fifth invention to be granted a patent is a more specific configuration of the invention of the above-mentioned fourth packing device, in which the film tension device is formed to extend outward from the rotary drum. Film, a reel bracket for holding the film, an L-shaped roller bracket having a fulcrum fixed to the rotating drum, a guide roller fixed to the rotating drum, an arm fixed to the tip of the roller bracket, and this roller. Between the fulcrum to which the bracket is fixed and the guide roller, there is a swing roller fixed to the free end of the arm, and the roller bracket has a small diameter and a chain sprocket of the same diameter at a predetermined interval. The roller and the large-diameter roller are connected via a chain, between the base end of the reel bracket and the free end of the reel, and the tip of the reel bracket. A spring is stretched between the roller and the adjustment screw formed on the roller bracket to bring the film held on the reel bracket into contact with the small diameter roller, and the large diameter roller, the guide roller and the swing roller are sequentially interposed. The film is stretched.

As the film stretching means, the film wound on the reel and the small-diameter roller are brought into contact with each other, and the film is stretched through the large-diameter roller, the guide roller and the oscillating roller in this order. Film tension can be applied to wind the film around the package.

A sixth invention to receive a patent is, in the packing apparatus according to the fourth invention, a deceleration position detection sensor for decelerating the rotational force of the rotary drum and an origin position detection on the rotational orbit of the rotary drum. A sensor is provided, and a servo motor is provided as a rotation drive source for the rotary drum.

Although the rotary drum has a large moment of inertia, a servomotor is used as its power source, so that the impact can be reduced even when a high-speed / low-speed switching operation is performed, and the rotation of the rotary drum is reduced. It can be stopped accurately at the reference position of the drum.

[0014]

First, the packaged item is placed at a predetermined position in the rotary drum. At this time, the leading edge of the film is gripped by the gripper under the table. By switching on,
The motor is started, and the rotary drum is rotated by each transmission means. By the rotation of the rotary drum, the film is wrapped around the package while a proper tension is applied by the action of the small diameter roller, the large diameter roller, the guide roller and the swing roller. When the film begins to wind around the package, the gripper retreats backward to a position where it is disengaged from the rotational track of the film while gripping the film.
Then, the sensor for detecting the origin position detects that the film has made one rotation, and when the film for the second rotation has wound up the film for the first rotation, the gripper is opened and the film grip end is set in a free state. When the sensor for detecting the origin position detects two rotations, compressed air is blown from the film end blow-back opening for an appropriate time, and the film tip is blown back into the film rotation orbit and becomes the third revolving film. Get involved. When winding a plurality of packages, the film is wound a preset number of times and then the rotating drum is temporarily stopped, after which the packages are additionally mounted and the winding operation is restarted.

Since the servomotor whose speed is switched from the high speed to the low speed by using the deceleration position detection sensor is used, the impact at the time of deceleration can be reduced. Then, after the motor is switched to a low speed, the origin position detection sensor stops the motor at an accurate position.
After that, with the gripper opened, the film is advanced from the retracted position to the orbital position of the rotary drum, and the film is gripped again. When gripping the film, the spring of the grip part is compressed and the cutter part comes out, so the film is cut by the cutter and the cutter receiver, the film on the packaged side is in the free state, and the other is gripped by the gripper Will remain. Almost at the same time as the film is cut, compressed air is blown from the blow-out port of the film-cutting end treatment device for an appropriate time to bring the cut end of the film into close contact with the revolving film wrapped around the package. This completes the packing operation. The number of windings of the film can be changed to any number by changing the electric operation program.

In the above operation, when packing a plurality of packages, one package is first placed on the table, the film is wrapped around the package, and then the rotary drum is installed. Once stopped, another package is placed on the same table, and the film winding operation is restarted. As a result, at least one film is interposed between the plurality of packages.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a front view of a packing apparatus used in the packing method of the present invention with a front cover removed, and FIG. 2 is a perspective view of the entire apparatus. 3 is a plan view with the gripper opened, FIG. 4 is an explanatory cross-sectional view of the state in which the film is cut, and FIG. 5 is an enlarged view of the film tension device. 6 is a sectional view taken along the line 〓-〓 in FIG. 5, and FIG. 7 is a sectional view taken along the line 〓-〓 in FIG. FIG. 8 is a plan view showing the structure of the film-cut terminal processing device, and FIG. 9 is an operation explanatory view after the film is cut. FIG. 10 is a side view showing the structure of the film grip front end returning device, and FIGS.
FIG. 6 is an explanatory diagram of an operating state. 20 to 24 are explanatory diagrams of operating states according to the method of the third invention.

The packing apparatus used in the present invention has a table 1 on which the objects to be packed are placed, and a gripper that integrally forms a cutter portion for gripping the film tip at the bottom of the table 1 and cutting the film. 20
A rotary drum 30 that circulates around the package on the table 1, a film tensioning device 40 that is fixed to the rotary drum 30 and stretches and winds the leading end of the film around the package, and that is disposed below the table 1. Film grip tip return device 50 fixed to the gripper 20
And a film terminal processing device 60 fixed to the gripper 20.

Table 1 on which the package A to be packed is placed
Are formed on the upper surface of the apparatus body. The rotary drum 30 described later rotates around the package A placed on the table 1 to wind the film. Numeral 2 is a protective cover when the rotary drum 30 goes around, and numerals 3 and 3 are the items A to be packed on the table 1.
Is a guide roller for mounting the. Reference numeral 4 is a front cover, and 5 is operation switches.

First, the structure of the gripper will be described with reference to FIGS. 3 and 4. Reference numeral 20 denotes a gripper arranged below the table 1. The gripper 20 has a grip portion for gripping the film front end Fa of the film F and a cutter portion 21 for cutting the film F.

The gripper 20 is composed of a pair of grip arms 20a and 20b, and is slidable by a slide guide 23 in an openable air chuck 22. One grip arm 20a
The grip portion 2 urged by the spring 24a.
4 is fixed to the slide rod 24b, and the grip arm 20
It is installed in a.
1a is attached by a cutter holder. Then, the other grip arm 20b has a cutter support 21
b is formed. Also, one grip arm 20
A lining made of rubber or the like is formed on the surfaces of the grip portion 24a of "a" and the other grip arm 20b, which face each other, to hold the clamping force of the film front end Fa. When the film F is gripped by the pair of grip arms 20a and 20b, the spring 24a of the grip portion 24 is compressed and the cutter portion 21 comes out.
The film is cut by a and the cutter receiver 21b.

The air chuck 22 has a connecting pin 2 on the side.
2a is formed and is connected to an air cylinder 26 via a link 25 having a long groove, and is retracted from a rotational orbit of a rotary drum 30 described later in an orthogonal direction (vertical direction in the drawing of FIG. 3) as indicated by an arrow. Is configured to. Therefore, only one drive source is required for the gripper 20 and the cutter portion 21, and the film F can be gripped and cut at the same time, so that the cycle time can be shortened.

As described above, since the gripper 20 retracts from the orbit while keeping the film front end Fa gripped,
When the film F is wrapped around the package A, the gripper 20 does not remain between the package A and the film F.
Can be tightened securely and there is no looseness in tightening. In addition, regardless of the shape of the package, the package can have any shape.

Reference numeral 30 denotes a rotary drum 30 that orbits the package A on the table 1 and the rotary drum 30 is
The guide rollers 31, 31, ... Are guided. The speed reducer 32 is provided on the outer peripheral surface of the rotary drum 30.
The endless belt 33 is stretched between the pulley 32a and the pulley 32a, and the driving force of the servo motor 34, which is the driving source, is transmitted via the timing belt 35 (see FIG. 1).

Reference numeral 36 is a rotary position reference fixed to the rotary drum 30, and an origin position detection sensor 36a is arranged facing the position reference 36 and the rotary drum 30 is provided.
The deceleration position detection sensor 36b is arranged on the rotation circuit orbit of the. Then, the origin position detection sensor 36a detects the preset number of rotations of the rotary drum 30, and the deceleration position detection sensor 36b switches the rotation speed of the motor 34 from high speed to low speed. At this time, since the servo motor 34 is used as the drive source, the impact at the time of deceleration can be reduced, the soft down can be performed, and the size and weight of the drive mechanism can be reduced.

In particular, since the packing device using the stretch film has a very large moment of inertia in the rotating part due to its structure, it is necessary to give special consideration to stopping the rotating force. The use of the servomotor 34 in combination with the simplification of the starting and stopping mechanism makes it possible to reduce the size and speed of the entire apparatus. Further, by properly selecting the acceleration and deceleration times of the servo motor 34, the impact at the time of starting and stopping can be suppressed to be small and the accurate position of the rotary drum 30 can be achieved even though the motor rotates at high speed during use. Can be stopped. Further, as the rotation diameter of the rotating drum 30 increases, the moment of inertia also increases, and the acceleration torque during acceleration also reaches the maximum torque. However, the acceleration torque can be selected as the minimum required motor capacity by increasing the acceleration time. .

Next, the structure of the film tension device 40 will be described with reference to FIG. The film tension device 40 includes a reel bracket 41 extending outward from the rotary drum 30 and holding a reel R of the film F, and an L-shaped roller bracket 42 having a fulcrum 42a fixed to the rotary drum 30. A guide roller 43 fixed to the rotary drum 30, an arm 44 fixed to the tip of the roller bracket 42, a fulcrum 42a to which the roller bracket 42 is fixed, and a guide roller 43.
And a rocking roller 45 fixed to the free end 44a of the arm 44.

FIG. 6 is a sectional view of the roller bracket 42 taken along the line 〓-〓. The roller bracket 42 has chain sprockets 46a, 47 of the same diameter at a predetermined interval.
A small diameter roller 46 having a and a large diameter roller 47 are connected via a chain 48. Reel bracket 41
Of the springs 44b, 4 between the base end of the arm 44 and the free end 44a of the arm 44, and between the tip 41a of the reel bracket 41 and the adjustment screw 42c attached at the tip of the roller bracket 42 via a screw bracket 42b.
2d is stretched. 42e is a rotary knob for adjusting the tension of the spring 42d. Then, the film F of the reel R held by the reel bracket 41 is brought into contact with the small diameter roller 46, and the film F is stretched from the reel R through the large diameter roller 47, the guide roller 43 and the swing roller 45 in order. Is done. The stretching amount of the film F changes depending on the diameter ratio of the small diameter roller 46 and the large diameter roller 47 and the spring tension of the springs 44b and 42d. Further, the swing roller 45 provided at the free end 44a of the arm 44 always maintains a constant tension.

FIG. 7 is a cross-sectional view of the reel bracket 41 taken along the line 〓-〓.
The film F wound around is held by the spring holder 41b. Further, the brake lining 41d is in contact with the base portion of the reel R from the adjustment screw 41f attached to the base end portion of the reel bracket 41 via the screw bracket 41e via the spring 41c to prevent the film F from being idle. Along with the diameter ratio of the small-diameter roller 46 and the large-diameter roller 47, the spring 44
It also has an auxiliary function of adjusting the stretching amount of the film F in combination with the changes in the spring tension of b and 42d.
The tension of the spring 41c can be adjusted by the rotary knob 41g.

Next, a method and apparatus for processing the tip of the film grip will be described. Reference numeral 50 denotes a film grip front end return device. The return device 50 retracts the film front end Fa gripped by the gripper 20 from the rotational orbit position of the rotary drum 30 and tightens it, and then the gripper 20 opens the film front end Fa. In this case, the film front end Fa is a front end processing mechanism for returning the film front end Fa to the rotating orbit while winding the film F around the package A by the film tension device 40 of the rotating drum 30 and winding the film F by the revolving film.

This film grip tip returning device 50
Are arranged on the upper surface of the gripper 20 via the bracket 55. That is, it is arranged between the table 1 on which the package A is placed and the gripper 20. In the illustrated embodiment, the tip return device 50 includes a gripper 20.
It is configured to be retracted from the position of the orbit of the rotary drum 30. The film returning means of the returning device 50 uses pneumatic means, and a nozzle 51 having an outlet 52 is formed in the device 50. As shown in FIG. 16, the blowing direction of the compressed air from the blowout port 52 of the nozzle 51 is such that the opened film front end Fa is rotated orbital of the rotary drum 30,
That is, it is a direction in which the film is blown back onto the orbit of the orbiting film.
The nozzle 51 of the returning device 50 is connected to the solenoid valve 54 via the air tube 53. Then, by blowing back the film front end Fa, the film front end Fa is rolled up by the revolving film, the film front end Fa does not get in the way after packaging, and the finished state becomes a packed state.

Next, a method and an apparatus for processing a film cutting terminal will be described. Reference numeral 60 is a film terminal processing device, and this processing device 60 is a mechanism for bringing the cut end of the film F into close contact with the wrapping film of the package, and forming a nozzle 61 in which a large number of blowing ports 62, 62, ... Are formed. Has been done. The nozzle 61 is connected to a solenoid valve 64 by an air tube 63. This nozzle 61
The blowing direction of the compressed air from the air outlets 62, 62, ... Is set so as to blow out from the rear position of the gripper 20 toward the cut terminal for an appropriate time as shown in FIG. Due to the self-adhesiveness of F itself, it is brought into close contact with the wrapping film wrapped around the package A. The nozzle 61 is fixed to the air chuck 22 of the gripper 20 via the bracket 65, and is configured to retract together with the gripper 20 from the rotary orbit of the rotary drum 30.

Therefore, the film end treatment apparatus 60 has a simple structure in which compressed air is used to blow from the rear position of the gripper 20 toward the cut end of the film F, but the self-adhesiveness of the film is utilized. As a result, the film can be firmly adhered, the film is less likely to be unraveled, and a packaged article of any shape can be adhered. Further, since compressed air is used, the film F has the effect of not being scratched.

Next, the operation of the entire apparatus will be described. First, the package A is placed on a predetermined position in the rotary drum 30 while being guided by the guide rollers 3 and 3 on the table 1. At this time, the film front end Fa moves from the reel R via the small diameter roller 26, the large diameter roller 27, the guide roller 43, and the swing roller 45 to the gripper 2 below the table 1.
It is gripped by 0. And the film F is
Small diameter roller 26, large diameter roller 27 and guide roller 4
3. By the action of the rocking roller 45, the product A is wrapped around the package A while applying an appropriate tension.

When the film F begins to be wound around the package A by turning on the start switch (foot type), the gripper 20 moves backward from the rotating orbit of the rotating drum 30 to a position where it is disengaged while gripping the film front end Fa. Move to. Then, when the rotation position reference 36 fixed to the rotating drum 30 is detected by the origin position detecting sensor 36a, it is detected that the rotating drum 30 has made one rotation, and the revolving film of the second rotation is changed to the first rotation film. The film is rolled up and continuously rotated. When the film for the second rotation is wound around the film for the second rotation, the grip arms 20a and 20b of the gripper 20 are opened, and the gripped film front end Fa is in a free state. Subsequently, when the origin position detecting sensor 36a detects that the film has rotated twice, compressed air is blown from the nozzle 51 of the film grip tip returning device 50 for an appropriate time, and the film tip Fa is returned to the rotating orbit. And it is caught in the third orbital film. When the winding operation of the film F set in the package A is completed by the rotation of the rotating drum 30, the deceleration position detection sensor 36b switches the rotation speed of the motor from high speed to low speed, and then the origin position detection sensor. The servo motor 34 stops at the correct position of the rotary drum 30 by 36a.

After that, the grip arms 20a and 20b of the gripper 20 are advanced from the retracted position to the orbital position of the rotary drum 30 while keeping the open state, and grip the film F again. When the film F is gripped, the spring 24a of the grip part 24 is compressed and the cutter part 21 comes out, so that the film F is cut by the cutter 21a and the cutter receiver 21b, and the film on the side of the package A becomes free, and the other one is The gripper 20 remains gripped. At almost the same time as the film F is cut, the film end processing device 60 has a nozzle 61 in which blow-out openings 61a, 61a, ...
As shown by, compressed air is blown out for an appropriate time to bring the cut end of the film F into close contact with the orbiting film wrapped around the package A. This completes the packing operation.

The above film winding operation has been described for the case of winding the package A three times. However, as shown in FIGS. 20 to 24, when packing a plurality of packages. , The program settings can be changed as follows. When packing a plurality of packages, first place one package A on the table 1 and
The film F is wrapped around the package A. After that, the rotary drum 30 is temporarily stopped, and another package B is placed on the same table 1. Then, the work of winding the film F is performed again. As a result, at least one film is interposed between the two packages A and B, and even if the two packages A and B are misaligned, it is possible to prevent the occurrence of scratches. In addition, in the above-mentioned embodiment, the case where the number of packings is two has been described.
Even in the case of three or more packages, the number of times the rotating drum is stopped and restarted may be set in advance or manually switched.

Further, at this time, by winding the film F in a spiral shape as shown in FIG. 24, it is possible to enhance the effect of preventing the occurrence of scratches in the case of a long product package. To wrap the film in a spiral shape, an operator can visually move the package, but the table 1 is equipped with an automatic package transport mechanism that is connected to a roller, a conveyor, or a motor to rotate the package. Drum 30
If the film is wound in a spiral shape in synchronism with the film winding operation, the labor can be reduced. The operations of the gripper 20, the rotary drum 30, the film tension device 40, the film grip front end returning device 50, the film end processing device 60 and the like are the same as those in the above-mentioned embodiment.

[0039]

As described above, according to the present invention, the package is placed on the table, the film is stretched from the film tension device fixed to the rotary drum, and the stretched film tip is gripped by the gripper. When the film is wrapped around the package by rotating the rotary drum that rotates around the package on the table, the gripper is retracted from the rotary position of the rotary drum while gripping the film tip, and the rotary drum is rotated several times. When the film is wrapped around the package, the gripping force of the gripped film tip is released, and the film tip blow-back device blows the film tip back to the rotating orbiting position of the rotating drum and winds it between the orbiting films, Then, cut the trailing edge of the film with the cutter that is integrated with the gripper, and Film type packing method being characterized in that so as to pack the packing article is brought into close contact with cut film rear end in the circumferential film by an end processing apparatus,
Since the packing device is provided, the following effects are achieved.

1. By integrating the gripper and the cutter, it is possible to grip and cut the film at the same time and shorten the cycle time. 2. When winding the film around the package, the gripper is retracted while gripping the film tip, so the gripper does not remain between the package and the film, so the package can be tightened firmly, and what kind of shape Packaged items can also be packed. 3. The film grip end return device winds the film grip end between the revolving films, so that the packaging finish is clean. 4. Since the film ends that have been wrapped around the package and cut are brought into close contact with compressed air, it is possible to make close contact without being restricted by the shape of the package. 5. Optimum film tension can be obtained by the film tension device, and since the servo motor is used, the mechanism can be simplified and high-speed packing can be performed.

[Brief description of drawings]

FIG. 1 is a front view of a packing apparatus used in a packing method of the present invention with a front cover removed.

FIG. 2 is a perspective view of the entire packing device.

FIG. 3 is a plan view showing a state in which a gripper is open.

FIG. 4 is an explanatory cross-sectional view of a state in which the film is cut.

FIG. 5 is an enlarged view of a film tension device.

6 is a cross-sectional view taken along the line 〓-〓 in FIG.

7 is a cross-sectional view taken along the line 〓-〓 in FIG.

FIG. 8 is a plan view showing the structure of a film-cut terminal processing device.

FIG. 9 is an operation explanatory diagram after the film is cut.

FIG. 10 is a side view showing the structure of the film grip front end returning device.

FIG. 11 is a front view illustrating the state before starting to wind the film.

FIG. 12 is a front explanatory view showing a state where the film has started to be wound.

FIG. 13 is an explanatory plan view showing a state where the gripper is retracted in FIG.

FIG. 14 is a front explanatory view showing a state in which the film is orbiting.

FIG. 15 is a front explanatory view showing a state in which the gripping force of the retracted gripper is released and the film front end is separated from the gripper.

16 is an explanatory plan view showing a state in which the film grip end returning device in FIG. 15 has started to operate. FIG.

17 is an explanatory plan view showing a state in which the film grip end returning device in FIG. 15 has been actuated and the film front end has been returned to the rotary circuit of the rotary drum. FIG.

FIG. 18 is a front explanatory view showing a state after the film grip end is rolled up.

FIG. 19 is an explanatory diagram showing an operation from starting to stopping of the motor.

FIG. 20 is a front explanatory view showing a state in which the film has been wrapped around one package and the rotary drum is temporarily stopped by the method of the second invention.

FIG. 21 is a front view showing a state where another package is placed on the table and the film winding operation is started again.

FIG. 22 is a front explanatory view showing a state where the film has been wrapped around a plurality of packages.

FIG. 23 is a front view showing a state in which a film is wrapped around a plurality of packages.

FIG. 24 is a plan view of a single winding state and a spiral winding state of the film in FIG. 23.

[Explanation of sign]

1 table 20 gripper 30 rotating drum 40 Film tension device 50 Film grip tip return device 60 film terminal processor

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Osamu Mochizuki             8 Maruzen Industry, 155 Nagabushi, Mishima City, Shizuoka Prefecture             Within the corporation

Claims (6)

[Claims] 1. A method of packing a film on a table by a rotary orbiting operation of a rotary drum, wherein a gripper gripping a film tip is retracted from a rotary orbital position of the rotary drum to orbit the rotary drum. After that, the film front end is returned to the rotational orbital position of the rotary drum so that the packaged product is wrapped between the orbital films and the packaged product is packaged. 2. A method of packing a film to be packed on a table by a rotary orbiting operation of a rotary drum, wherein a gripper gripping a film tip is retracted from a rotary orbital position of the rotary drum, and the rotary drum is rotated several times. After the film is circulated, the film front is returned to the rotational orbital position of the rotary drum by the film front return device and wound between the revolving films, and then the film rear end is cut, and the film is cut by the film end processing device. A film-type packing method, characterized in that an end is brought into close contact with a wrapping film to pack a packaged item. 3. The film method according to claim 2, wherein at the time of packing a plurality of packages, at least one film is interposed between the packages. Packing method. 4. A table on which a package to be packaged is placed, a gripper that integrally forms a cutter portion for cutting a film while gripping a film tip at the bottom of the table, and a package on the table. A rotating drum that circulates around, a film tension device that is fixed to the rotating drum and stretches and winds the film tip around the package, and a film grip tip returning device that is fixed to a gripper disposed at the bottom of the table, and It is composed of a film terminal processing device fixed to the gripper, the gripper is provided so as to be retractable from the rotational orbiting position of the rotary drum while gripping the film tip, and the film is wrapped around the package by orbiting the rotary drum several times. When releasing the gripping force of the film tip that is being gripped, A packing device, wherein a return device is operated, and a film end processing device is operated after the trailing edge of the film is cut by a cutter portion. 5. The packing device according to claim 4, wherein the film tension device is an L-shaped member having a reel bracket extending outward from a rotary drum to hold a film, and a fulcrum fixed to the rotary drum. Fixed to the free end of the arm between the roller bracket, the guide roller fixed to the rotating drum, the arm fixed to the tip of the roller bracket, and the fulcrum to which the roller bracket is fixed and the guide roller. A small diameter roller having a chain sprocket of the same diameter and a large diameter roller are connected to each other through a chain at a predetermined interval in the roller bracket, and the base end of the reel bracket and the reel are connected to each other. Of the reel bracket and the adjustment screw formed on the roller bracket. And a film held on the reel bracket are brought into contact with the small-diameter roller, and the film is stretched through a large-diameter roller, a guide roller and a swing roller in order. apparatus. 6. The packing device according to claim 4, wherein a deceleration position detection sensor and an origin position detection sensor for decelerating a rotational force of the rotary drum are provided on a rotary orbit of the rotary drum, and a rotary drive source for the rotary drum. A packing device characterized in that a servo motor is provided as a.