JPS5834002Y2 - Film adhesion prevention device in automatic packaging machines - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a film adhesion prevention device for an automatic packaging machine that prevents a packaging film from adhering to a horizontal sealer during automatic packaging.

An automatic packaging machine is already known that seals a material film for packaging into a substantially envelope shape with the inside filled with packaging material using a vertical sealer and a horizontal sealer, and also incorporates a cutter in the sealing surface of the horizontal sealer. Then, at the same time as the horizontal sealing or after the sealing, the central part of the horizontal seal is bisected to make the package into a single package, and the horizontal sealer is moved downward with the seal still applied, and one pack of material film is made. An automatic packaging machine configured to pull out from the take-up roll side has already been developed.

However, in the automatic packaging machine that packages the above-mentioned material film into a substantially envelope shape, there is a problem that the film adheres to the sealer, especially the horizontal sealer, resulting in double and overlapping packaging, resulting in defective packaged products. .

The material film used when sealing a film into a roughly envelope shape is a heat-resistant material such as polyethylene, polypropylene, etc. on both sides of the printed film, since the front and back edges of the film are overlapped and sealed vertically in a cylindrical shape. It uses a special three-layer film with a plastic synthetic resin film bonded to it.

Therefore, when sealing with a sealer, the surface of the film, especially the surface side, is welded to the heated sealer surface, causing trouble in automatic feeding of the film and the packaged product.

Conventionally, the sealer is treated with Teflon to make it removable, or it is packaged with Teflon tape or the like interposed between the sealer surface and the film surface, but if the Teflon-treated sealer is used continuously for a long time, There are problems with peelability, and the use of Teflon tape has problems with durability, and it requires a complicated tape feeding and attachment mechanism, which affects the price of the automatic packaging machine. There are problems in that it requires personnel to replace the tape and the replacement work is complicated.

In addition, in an automatic packaging machine in which the horizontal sealer feeds the film, the welding of the film to the vertical sealer is forcibly peeled off by the traction force of the film when the horizontal sealer feeds the film. It was developed to prevent the film from adhering to the surface.

Therefore, the present invention is a film adhesion prevention device for automatic packaging machines devised to effectively solve the above-mentioned problems. The configuration will be explained in detail.

In Figures 1 and 2, 1 is a wide material film 1
A is wound into a roll with a take-up roll, and the material film 1A is pulled out from the roll 1 by the drawing action of the horizontal sealer, which will be described later.
It will be rolled out sequentially.

The material film 1A is a three-layer special film in which films of thermoplastic synthetic resin, ie, polyethylene, polypropylene, etc., are adhered to both the front and back surfaces of a printed film (not shown).

Reference numeral 2 denotes a rotating shaft on which a plurality of slitters 3 are attached at equal intervals, and the material film 1A fed out from the take-up roll 1 is passed through each slitter 3 and the slitter receiver. It passes between the rollers 4 and is slit into strip films 1a of the same width.

5 and 6 are the respective slit film strips 1a...
... and is a tension roller that applies tension to each film.

Next, 7... is each strip film 1a...
This is a partition plate that divides the passage of the slit films 1a, and prevents the slit film strips 1a from overlapping each other during feeding, thereby preventing variations in the transport state of each film.

Reference numeral 7a indicates a mounting plate on which the partition plates 7 are mounted at equal intervals.

8... are chutes for supplying packaging materials that are arranged in parallel at equal intervals, and the whole has a pipe shape, and a hopper 8a as shown in Fig. 1 is attached to the upper end of each hopper 8a.
A predetermined amount of packaging material is sequentially and repeatedly supplied from a material supply device (not shown).

Further, 9a... and 9b... are used for bag making in which each band-shaped film 1a sent through the tension rollers 5, 6 is wrapped around each chute 8 in a substantially cylindrical shape. When each strip film 1a passes through the bag-making needle 9a and the bag-making tube 9b, it is formed into a state in which both ends are overlapped with each other.

Reference numeral 10 denotes an actuating plate that repeatedly advances and retreats (presses) the front surface of each of the shooters 8, and the actuating plate 1
Each strip film 1 formed into a cylindrical shape is disposed on the inner surface of the film 1.
Press the double edges 1a' of a at the same time to form a vertical seal P'
A plurality of vertical sealers 11 are fixed at equal intervals.

1b... is a cylindrical film formed entirely into a cylindrical shape by molding the vertical seal P', and 12...
. indicates a pressure plate that presses the opposite side of each chute 8 to assist in sealing when the vertical sealers 11 . . . operate to seal.

Further, reference numeral 13.13' denotes a drive plate disposed below the actuating plate 10 and the pressure plate 11 so as to sandwich the passages of the respective cylindrical films 1b from both sides. A plurality of horizontal sealers 13a..., 13a'... are provided on the inner surface.
... are fixed at equal intervals.

The two moving plates 13, 13' are the actuating carrier 1 shown in FIG.
4 and 14' (omitted in FIG. 2), and both working carriers 14 and 14' follow the trajectory 14a shown by the arrow in FIG.
, 14 a', a series of rectangular movements consisting of a relative closing movement, that is, a clamping action, a downward feeding action, an opening action, and an upward return action are repeatedly performed by a piston and other drive mechanisms (not shown). I am wary of the system.

Therefore, when both operating carriers 14, 14' are closed, the above-mentioned horizontal sealers 13a, 13a' close each cylindrical film 1.
b... can be adhered from both sides, and a horizontal seal P// can be applied to each film.

Further, a cutter receiving groove 15 and a cutter 15' are incorporated in each of the horizontal sealers 13a and 13a', respectively.
At the same time as the horizontal seals P// of 13a and 13a', an operating mechanism (not shown) attached to the operating carrier 14' operates to direct the cutter 15' toward the receiving groove 15 as shown in FIG. The packaged product P can be made into a single unit by cutting the central portion of the seal P'' into two parts.

Furthermore, from the above-mentioned shooter 8, there is a horizontal seal P.
//A packaging material is fed into each tubular film 1b after formation.

Both lateral sealers 13 a and 13 a' hold both the cylindrical film 1 b and the packaged product P, which have been bisected by the cutter 15 ′, while the fourth sealer 13 a and 13 a' are moved to the fourth sealer by the action of the actuating carriers 14 and 14 ′.
It moves downward as shown in the figure and pulls out the material film 1A from the take-up roll 1 side by l buff.

When the drawing is completed, both lateral sealers 13a and 13a' are opened in the direction of the arrow in FIG. 5 by the action of the actuating carriers 14 and 14'.

At this time, the cutter 15' is retracted into the original horizontal sealer 13a', and in particular, in the present invention, the vertical sealer 11 is moved between the horizontal sealers 13a and 13a' from just before reaching the bottom dead center of the lower movement. Until the horizontal sealers 13a and 13a' are opened and the horizontal seal is released, vertical sealing can be continued and the next vertical seal P' can be applied to the film 1a. The structure is designed to prevent the film 1A from being pulled out.

Furthermore, the distance to the bottom dead center of the horizontal sealers 13a and 13a' is slightly longer than the total length l of the packaged product P, that is, the length of one pack of material film, and is configured in the relationship L=l+x. has been done.

Therefore, since the vertical sealing P' by the vertical sealer 11 is performed immediately before reaching the bottom dead center of the horizontal sealers 13a and 13a' as described above, in the apparatus of the present invention, the cylindrical film 1b is At the bottom dead center of 13a, 13a', it is in a slightly extended state and the horizontal sealer 13a,
When 13a' is opened, the cylindrical film 1b contracts upward as shown by the arrow in FIG. It can be pulled off and prevented from welding.

Next, the horizontal seal P// portion of the packaged product P is applied to the horizontal sealer.
The problem of welding to 13a or 13a' is 16.16
The problem is solved by the feeding member shown in its entirety respectively in '.

That is, the feed members 16, 16' are respectively attached to the aforementioned actuating carriers 14, 14', and are rotated relative to each other in the clockwise and counterclockwise directions, for example, by the meshing action of the motor and the gears 17a, 17a'. The feed rotation shafts 16a, 16a' and both shafts 16a perform rotations.

It is composed of vane plates 16b, 16b' fixed to 16a', and soft feeding materials 16C, 16C' such as sponges or brushes attached to both warm root plates 16b, 16b'.

The two rotating shafts 16a and 16a' are normally arranged as shown in FIG.
The horizontal sealer 13 is stopped at the position shown in FIG.
At the same time as a and 13 a' open, relative rotation begins, and the feed members 16 C and 16 C' sandwich and feed the packaged product P downward as shown in FIG. -13a or 13a' can be forcibly peeled off.

Moreover, FIG. 7 is a time chart showing the operating states of each of the above-mentioned members.

Although the drawing shows a multiple automatic packaging machine that can seal multiple packages at once, the present invention can also be applied to regular automatic packaging machines that can seal one package with one seal. Of course, it can be implemented.

Alternatively, the above-mentioned actuating carriers 14, 14' may be configured to simply move up and down, and the horizontal sealers 13a, 13a' may be configured to operate independently for opening and closing sealing by means of a piston or the like.

As described above, the present invention continues from just before the bottom dead center of the left and right horizontal sealers, which move downward while horizontally sealing the vertical seal by the vertical sealer, until both horizontal sealers are opened and the horizontal seal is released. At the same time, since the distance up to the bottom dead center of both horizontal sealers is made slightly longer than the length of one pack of packaged goods, the cylindrical film stretched when the horizontal sealers are opened will contract upward. This shrinkage force allows the horizontal seal part of the cylindrical film to be completely peeled off from the horizontal sealer that opens, and furthermore, the horizontal seal part of the packaged product, which has been sealed and cut, also separates when both horizontal sealers open. Since the packaged product is forcibly sent downward by the rotating feeding member, it is completely peeled off from the horizontal sealer that opens, so the horizontal sealer is coated with Teflon or the sealing area is covered with Teflon tape. It is possible to prevent the cylindrical film and each horizontal seal part of the packaged product from welding to the horizontal sealer without intervening, and therefore, various problems such as poor film feeding, single sealing and double sealing due to welding can be prevented. Furthermore, since the feeding member has an extremely simple structure, it has the economic advantage of being easy to manufacture and assemble into an automatic packaging machine, and can be used at low cost. It is suitable for use in automatic packaging machines for sorting.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a schematic side view of a multiple automatic packaging machine equipped with the present invention, FIG. 2 is a perspective view thereof, and FIGS. 3, 4, and 5 are FIG. 6 is a perspective view of a packaged product, and FIG. 7 is a time chart. 1...Take-up roll, 1A...Material film, 1b...Tubular film, 11...
・Vertical sealer, 13a, 13a'... Horizontal sealer, 14, 14'... Working carrier, 15...
...Cutter, 16.16'...Feeding member,
P...Packaged product, P'...Vertical seal, P
″・・・Horizontal seal.

Claims (1)

[Scope of utility model registration request] A vertical sealer vertically seals the raw material film into a cylinder with both sides overlapped, and the vertically sealed film is intermittent horizontally sealed from the left and right to seal the entire raw material film inside the packaging material. A pair of left and right horizontal sealers seal and package the product in a substantially envelope-like state when the product is filled, and the product is assembled into both horizontal sealers, and the central part of the horizontal seal is bisected at approximately the same time as the horizontal seal to separate the packaged product into a single packaged product. The left and right horizontal sealers move to the bottom dead center of the lower movement in the horizontal seal state between the vertical seals by the vertical sealers, and pull out one pack of material film from the take-up roll side. After that, open it left and right to release the horizontal seal, and
In an automatic packaging machine configured to return to the starting position, the vertical sealer vertically seals the material film,
The horizontal sealer is configured to carry a load from just before reaching the bottom dead center of the lower movement until it is opened and the horizontal seal is released, and the stroke amount of both the horizontal sealers until reaching the bottom dead center is The length of the material film is adjusted to be slightly longer than the length of one pack, and the left and right actuating carriers that move the left and right horizontal sealers are configured to mutually rotate when the horizontal sealers release the seal and separate the single packaged products. A device for preventing film adhesion in an automatic packaging machine, characterized by being equipped with a feed member that forcibly feeds the film downward.