JPH0692305A - Sealing apparatus for packing container - Google Patents

Abstract

PURPOSE:To supply automatically sealing films one after another to packing containers having no flanges on the peripheries of their openings, and to seal the openings with the sealing films by heat sealing. CONSTITUTION:The front end of a swing arm that is so provided that it can ascend and descend is made to face respectively a supply part supplying packing containers 1 and a supply part supplying a roll film 4, and a vacuum chuck and a heat sealing device are provided to the lower part on the front end of the swing arm 8 while a cutter for punching sealing films is provided to the supply part of the roll film 4 so that it can face the vacuum chuck.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing device for a packaging container, in which sealing films are supplied one by one to the opening of the packaging container and sealed by heat sealing.

[0002]

2. Description of the Related Art Conventionally, a packaging container for packaging foods, etc. is made of a synthetic resin molded product, and after containing the contents, the opening is closed with a seal film, and the seal film and the opening edge are heat-sealed. It was applied and sealed.

The sealing film is supplied to each packaging container one by one, and an operator supplies the sealing film one by one to the operating portion of the heat sealing tool or to a plurality of aligned packaging containers. There is also known an automatic sealing device in which a band-shaped film is covered, heat-sealed, and then the band-shaped film is punched to separate the packaging container from the band-shaped film.

[0004]

In the prior art as described above, the method in which the worker supplies the seal films one by one to the operating portion of the heat sealer has a limitation in the operating speed and cannot improve the work efficiency. There was a point. It is possible to automatically supply the seal film using a grasping tool such as a vacuum chuck tool. However, if one seal film is taken out from a large number of seal film groups, the seal films are attracted by static electricity or the like. In a relationship
It was extremely difficult.

Further, the method of covering the aligned packaging containers with a band-shaped film and heat-sealing is compatible with automation and is efficient, but it is a film punching step after heat-sealing. In addition, a flange for forming a heat-sealed portion on the periphery of the opening is indispensable on the side of the packaging container, and thus there is a problem that it cannot be applied to a packaging container having no flange at the opening.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and one sealing film is provided even for a packaging container having no flange formed outside the opening. An object of the present invention is to provide a sealing device for a packaging container that can be automatically supplied and can be sealed by heat sealing.

In the packaging container sealing device of the present invention which achieves the above object, the tip of a pivoting arm installed so as to be able to move up and down can respectively face the feeding portion of the packaging container and the feeding portion of the roll film. A vacuum chuck tool and a heat seal tool are provided below the tip of the moving arm, and a seal film punching cutter facing the vacuum chuck tool is provided in the roll film supply section.

The rotating arm may be a single rotating arm or a plurality of rotating arms. By providing the rotating arms on both sides of the upper part of the rotating shaft, 180-degree reversal drive can be performed, and on the other hand, the sealing film can be held by suction. On the other hand, the seal film can be heat-sealed at the same time, which is preferable.

The heat seal tool can be arranged outside the vacuum chuck tool, and the vacuum chuck tool can be projected and retracted from the heat seal tool.

The vacuum chuck tool and the heat seal tool are
One set or a plurality of sets can be provided at the tip of one rotating arm.

Next, the supply part of the packaging container can be one side of the rotary table provided on the circumference of the support part of the packaging container, but one side of the linear conveying device such as a conveyor. You can also

The roll film supply section may be a horizontal portion on one side of the roll film guided from the rewinding roll to the winding roll.

[0013]

According to the packaging container sealing device of the present invention, the sealing films punched from the roll film can be vacuum-chucked one by one to the tip of the rotating arm and transferred to the packaging container side. Further, the transferred seal film can be heat-sealed to the opening of the packaging container.

[0014]

EXAMPLE An example in which the present invention is applied to a packaging container which constitutes a packaging mirror cake will be described below with reference to the drawings.

In the figure, reference numeral 1 is a packaging container, which has an opening formed in the center of the upper surface (bottom surface as a packaging mirror cake), and the peripheral edge of the upper surface forming the opening edge.

A supply device 3 for the packaging container 1 is installed on one side of the upper part of the gantry 2 (on the left side in FIG. 1), and a roll film 4 is provided on the other side.
The supply device 5 is installed, and both supply devices 3 and 5 are installed.
A rotary shaft 7 mounted on the elevating mechanism 6 is installed in an intermediate part of the above, and a beam 9 forming rotary arms 8 extending linearly on both sides is installed above the rotary shaft 7.

The elevating mechanism 6 is composed of a cylinder 10 and linear shafts 11 and 11. The cylinder 10 is operated to move the rotating arms 8 and 8 by the positions and chain lines shown by solid lines in FIG. It can be raised and lowered between the positions shown. Further, the rotary shaft 7 can be rotationally driven by a rotary drive device 12, and the rotary arms 8 can be alternately rotated at an angle of 180 degrees in a forward rotation direction and a reverse rotation direction.

As shown in FIG. 2, the supply device 3 for the packaging container 1 is arranged along the circumference of a disk-shaped rotary table 13 as shown in FIG.
The support parts 14, 14 of the packaging container 1 are installed at equal intervals on the same circumference, and the rotary table 13 is a stepping motor 15 installed on the gantry 2 side so that it can be intermittently rotated at a predetermined angle. Has become.

In the case of the embodiment, the number of the supporting portions 14 and 14 is eight, and the intermittent rotation is such that it intermittently rotates at an angle of 90 degrees. On the other hand, a rectangular plate 16 is provided on the lower side of the tips of the rotating arms 8, and the lower surface of the rectangular plate 16 can face the two supporting portions 14 and 14 on the rotary table 13. As described above, two functional members 17 including a vacuum chuck tool and a heat seal tool are installed.

The functional member 17 installed below the tip of the rotating arm 8 is constructed as shown in FIG. That is, the cylindrical body 18 is fixed to the lower surface of the rectangular plate body 16, and the annular heater bar 19 which is a heat sealer is fixed to the lower end portion of the cylindrical body 18. Further, a hollow cylinder 20 penetrating the rectangular plate body 16 is provided so as to coincide with the central axis of the cylindrical body 18, and the bottom plate 21a has a through hole 21 at the lower end thereof.
The bottomed tubular body 21 in which b and 21b are formed is slidably fitted, and the bottomed tubular body 21 is biased downward by a coil spring 22 installed between the bottom plate 21a and the lower end of the hollow barrel 20. A vacuum chuck tool is configured. Vacuum exhaust system 1 is hollow cylinder 2
Connected to the top opening of 0 (not shown). An annular flange 23 is formed on the outer side of the lower end of the hollow cylinder 20, and a set screw 24 screwed to a side wall of the bottomed cylinder 21 is engaged with the bottomed cylinder 21 urged by a coil spring 22. So that it doesn't get out. In the figure, 25 is a cylindrical cover.

Next, the supply device 5 for the roll film 4 will be described.

The roll film 4 is mounted on a rewinding roll 26 and is sequentially moved to a winding roll 28 which is intermittently driven by a stepping motor 27.
The horizontal portion 4a between the guide rolls 29a, 29b so as to pass through the two guide rolls 29a, 29b, 29c.
Is the lower part of the tip of the rotating arm 8, that is, the functional member 1.
It is facing No. 7. In the figure, 30 is a rotary encoder for measuring the feed distance of the roll film 4, and 31 is a tension roll.

A rotary cutter 32 is installed on the lower side of the horizontal portion 4a so as to be vertically movable. 33
Is a lifting cylinder, and 34 is a rotating motor.
On the other hand, on the upper side of the horizontal portion 4a, a ring-shaped cutter 35 is provided so as to follow the rotation trajectory of the rotary cutter 32.
Is installed. It should be noted that the distance from the central axis of the rotary cutter 32 can be changed, and accordingly, the ring-shaped cutter 35 can also be replaced with one having a different inner diameter.

In the embodiment, it goes without saying that the packaging container 1 and the roll film 4 are selected from materials that can be heat-sealed to each other. When the rotating arms 8 are lowered so that the heater bar 19 as a heat sealer is brought into contact with the opening edge of the packaging container 1 with a predetermined pressure, the bottomed cylindrical body 21 constituting the vacuum chucking tool is formed. Resists the coil spring 22 and retracts. At this time, in the rotating arm 8 located on the side of the roll film supply device 5, the bottomed cylinder 21 projects outward from the heater bar 19, and the bottom surface of the bottomed cylinder 21 is the roll film. It is adapted to come into contact with the upper surface of the horizontal portion 4a of No. 4.

Next, the operation of the above embodiment will be described.
The beam 9 constituting the rotating arms 8 and 8 descends and rises,
It is operated in the sequence of 180 degree rotation (normal rotation), descending, rising, and 180 degree rotation (reverse rotation).

On the roll film supply device 5 side, when the rotating arm 8 descends, the lower surface of the bottom plate 21a of the bottomed cylindrical body 21 of the vacuum chucking tool contacts the horizontal portion 4a of the roll film 4. Therefore, when a vacuum is introduced into the vacuum chuck tool through the hollow cylinder 20 and the rotary cutter 32 is raised and rotated once, the circular seal film 36 is punched out from the roll film 4, and the seal film 36 has a bottom. The bottom plate 21a of the cylindrical body 21 is vacuum-adsorbed.

On the other hand, on the supply device 3 side of the packaging container 1, assuming that the seal film 36 is already adsorbed on the rotating arm 8 as described above, the rotating arm 8 descends, The sealing film 36 is the packaging container 1
To the opening and cover the opening. Swivel arm 8
Of the bottomed cylinder 2
1 retracts as the arm 8 descends, and at the final position, the heater bar 19 comes into contact with the heat-sealing portion, which is the opening edge portion of the packaging container 1, through the sealing film 36 with an appropriate pressure, and the sealing film 36 and the packaging film 36 are packaged. The opening edge of the container 1 is heat-sealed, and the opening is closed. Here, the vacuum chuck can be released by switching the vacuum introduced into the hollow cylinder 20 and introducing the atmosphere.

As described above, the rotating arms 8 and 8
It is possible to repeatedly perform the operation of chucking the sealing films 36 one by one and transporting them to the opening of the packaging container 1, and applying the sealing film 36 to the packaging container 1 at the end of the transport. It suffices to perform intermittent movement of the roll film 4 and intermittent rotation of the rotary table 13 during the rotary operation of the rotary arms 8, 8.

In the packaging container supply device 3 of the embodiment, as shown in FIG.
The position A can be used as the charging part (automatic or manual) of the filled packaging container 1, and the position B can be used as the unloading part (automatic or manual), but is not limited to this embodiment. Not. Further, increase the intermittent stop position, and make the filling device for the contents such as the rice cake discharge nozzle face up from one side to the intermittent stop position, and configure a system that can perform continuous processing from filling to sealing the opening. Is also possible.

[0030]

As described above, according to the present invention, the sealing films are accurately transferred one by one to the opening of the packaging container, and the opening of the packaging container is closed by heat sealing at that portion. There is an effect that an efficient automatic sealing device can be provided. Further, since the seal film is punched out from the roll film before heat sealing, there is an effect that even a packaging container having no flange outside the opening can be automatically sealed.

[Brief description of drawings]

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

FIG. 2 is a plan view of the same embodiment.

FIG. 3 is a partially enlarged cross-sectional view of the same embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Packaging container 3 Supply device for packaging container 4 Roll film 5 Supply device for roll film 8 Rotating arm 13 Rotating table 14 Support part 17 Functional member 19 Heater bar 20 Hollow cylinder 21 Bottom cylinder 22 Coil spring 26 Rewinding roll 28 Take-up roll 32 Rotary cutter 35 Ring cutter 36 Seal film

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[Procedure amendment]

[Submission date] February 16, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0020

[Correction method] Change

[Correction content]

The functional member 17 installed below the tip of the rotating arm 8 is constructed as shown in FIG. That is, the cylindrical body 18 is fixed to the lower surface of the rectangular plate body 16, and the annular heater bar 19 which is a heat sealer is fixed to the lower end portion of the cylindrical body 18. Further, a hollow cylinder 20 penetrating the rectangular plate body 16 is provided so as to coincide with the central axis of the cylindrical body 18, and the bottom plate 21a has a through hole 21 at the lower end thereof.
The bottomed tubular body 21 in which b and 21b are formed is slidably fitted, and the bottomed tubular body 21 is biased downward by a coil spring 22 installed between the bottom plate 21a and the lower end of the hollow barrel 20. A vacuum chuck tool is configured. The vacuum exhaust system is a hollow cylinder 20.
Connected to the upper end opening (not shown). Hollow cylinder 2
An annular flange 23 is formed on the outer side of the lower end of 0, and a set screw 24 screwed to the side wall of the bottomed tubular body 21 is engaged with the bottomed tubular body 21 urged by a coil spring 22 to come out. I try not to. In the figure, 25 is a cylindrical cover.

Claims (6)

[Claims] 1. A vacuum chuck tool and a heat seal tool are provided at the lower end of the rotary arm, wherein the tip of a rotary arm that can be moved up and down can face the supply section of the packaging container and the supply section of the roll film, respectively. And a seal film punching cutter facing the vacuum chuck tool at the roll film supply section. 2. The sealing device for a packaging container according to claim 1, wherein the rotating arms are provided on both upper sides of the rotating shaft. 3. The sealing device for a packaging container according to claim 1, wherein the heat sealing tool is arranged outside the vacuum chucking tool, and the vacuum chucking tool can be projected and retracted from the heat sealing tool. 4. The vacuum chuck tool and the heat seal tool are provided in plural sets on one rotary arm.
Sealing device for the packaging container described. 5. The sealing device for a packaging container according to claim 1, wherein the supply part of the packaging container is one side of a rotary table provided with a supporting portion of the packaging container on a circumference. 6. The sealing device for a packaging container according to claim 1, wherein the roll film supply unit is a horizontal portion on one side of the roll film guided from the rewinding roll to the winding roll.