JPH0699945A - Device for separating stuck film in hot sealing unit of packing machine - Google Patents

Abstract

PURPOSE:To make it possible to surely restrain a film from being stuck to a hot sealing part of a hot sealing unit or to separate a film having been stuck to the sealing part after hot sealing without hindering a transfer operation of the film or opening operation thereof. CONSTITUTION:A device for separating a stuck film in a hot sealing unit of a packing machine, wherein an air blow device 7 is provided on the film transfer side of a hot sealing device 3 to blow air along the film 1 to a hot sealing part of the device 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat sealing device for a packaging device.

[0002]

2. Description of the Related Art As a packaging device of this type, there is provided a film supply device for drawing and guiding a long film while half-folding the film with the upper edge side being an open part, and a heat for heat-sealing the supplied film. The sealing device, the package storage device that stores the package in the film formed into a bag by the heat sealing, and the film cutting device that cuts the film at a predetermined position constitute the packaging device.

In this case, a film having a predetermined width folded in a V shape having an opening on the upper edge side is drawn out and supplied from a film supply unit, and the film supplied and transferred is provided with two longitudinal seals at a small interval. Is applied one after another with a heat-sealing device at intervals of one bag, and is cut in advance with a film cutting device leaving a little upper end of the film between these two vertical seals,
With this vertical seal, the upper opening of the film bag formed between the vertical seals is opened by the package storage device, the package is loaded, and the upper opening of the film bag after storing the package is horizontally transferred by the heat seal device. The film is sealed and sealed, the uncut portion left in advance is cut off and cut by a cutting device, and the film packaging bag containing the package is transferred and discharged one after another.

[0004]

In such a heat-sealing device for a packaging device, a film may adhere to the heat-sealing portion after heat-sealing.

If the film is pulled out and transferred while it is still attached, various problems will occur in the film transfer such as the film being cut or the film opening operation not being performed smoothly. Measures are taken to prevent peeling and adhesion.

Conventionally, as this means, for example, a peeling shaft is projectingly fixed to the heat seal portion toward the film, and the film to be attached to the heat seal portion that separates after the heat seal is attached at the tip of the peel shaft. Some are forced to peel off.

However, there is no problem as long as the continuous long film is simply transferred. For example, in the packaging device as described above, the film is cut by the film cutting device at the position of the heat sealing device and the upper end is cut. Since the film is connected only by the part, the lower end of the film catches on the peeling shaft to support the film transfer, and it becomes an obstacle when opening the upper end of the film by the package storage device, There is also a problem that it interferes with the film opening operation.

An object of the present invention is to solve the above problems and to provide a film adhering / separating device in a heat sealing device of an excellent packaging device which does not hinder film transfer and film opening operation.

[0009]

The gist of the present invention will be described with reference to the accompanying drawings.

A film feeding device 2 for pulling out and guiding a long film 1 having an upper edge side as an open portion while folding back in a half-folded state, a heat sealing device 3 for heat sealing the supplied film 1, and a heat sealing device A package storage device 5 for storing a package 4 in a bag-shaped film 1 and a film cutting device 6 for cutting a predetermined position of the film 1.
In the heat sealing device 3 of the packaging device a, the heat sealing device 3 is provided on the front side of the film transfer of the heat sealing device 3.
An air blower 7 for injecting air along the film 1 is provided to the heat-sealing part of the film sticking / peeling device in the heat-sealing device of the packaging device.

A film adhering / peeling in a heat seal device of a packaging device according to claim 1, wherein a guide body (8) for restricting an injection direction of the air blown to the air blow device (7) is provided in a protruding state toward the film transfer side. It relates to the device.

[0012]

The air is blown along the film 1 from the air blow device 7 to the heat seal portion of the heat seal device 3.

Due to the air pressure of the air, the adhesion of the film 1 to the heat seal portion is suppressed or the adhered film is peeled off.

If the air blower 7 is provided with the guide body 8, the air is properly injected along the film 1 to the heat seal portion of the heat seal device 3.

[0015]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, a film 1 having a predetermined width folded in a V shape is drawn by a film drawing chuck device 21 and drawn and supplied from a film supply unit 2.
As shown in FIG. 3, two films of vertical seals 9 are provided on the transferred film 1 at intervals of one bag by a heat seal device 3A at intervals of one bag.

The gap between the two vertical seals 9 is cut by a film cutting device 6 provided in advance at the position of the heat sealing device 3A, leaving the upper end of the film 1 a little.
The upper opening of the film bag formed therebetween is opened by the package storage device 5, and the package 4 is loaded.

The upper opening of the film bag which has finished storing the package 4 is laterally sealed 10 by the heat sealing device 2B and sealed, and the uncut portion 11 left in advance is cut off and cut by the cutting device 12, and wrapped. The film packaging bags 13 containing the articles 4 are transferred and discharged one after another. Based on the packaging device a having the above-mentioned configuration, the heat seal cutting device 3A of the present embodiment is
The film 1 is provided with two heat seals 9 vertically spaced at a predetermined interval, and the heat seal portion is provided with a movable heat seal portion 15 which can be freely attached to and detached from a seal base 14. A heat-sealing position of the film 1 is held between the portions 15 to perform heat-sealing, and a film cutting device 6 is provided for vertically cutting the film 1 between the two vertical seals 9 while leaving the upper end of the film 1.

In the present embodiment, the present invention is applied to the heat sealing device 3A that performs the vertical sealing 9.

Next, an embodiment of the air blower 7 which is the subject matter of the present invention will be further described. In this embodiment, as shown in FIG. 4, a pair of heat sealing devices 3A are provided on the front side of the film transfer at opposing positions with the film 1 sandwiched therebetween.

At this position, as shown in FIG. 5, an attachment body 16 is erected, an air delivery pipe 17 for supplying air from a supply source is guided to the attachment body 16, and an air injection pipe is connected to the air delivery pipe 17. The nozzle 18 is attached at an appropriate height position above the mounting body 16.

The air injection nozzle 18 is directed toward the heat seal portion of the heat seal device 3A so as to be ejected slightly downward along the film 1, and the cross sectional shape of the injection opening portion of the air injection nozzle 18 is the vertical direction of the film. Designed so that the film 1 adhered to the heat-sealed portion (for example, the movable heat-sealed portion 15) after heat-sealing can be appropriately peeled off by wind pressure after the air is ejected along the film 1. ing.

Further, in this embodiment, a plate-shaped guide body 8 is provided in a standing state on the film side of the air injection nozzle 18 so as to project toward the heat seal device 3A. The air is ejected in the direction of the heat-sealed portion and is regulated in the direction of peeling the film 1 along the film 1.

Further, the injection of air by the air blowing device 7 has the effect of preventing the film 1 from adhering to the heat seal portion or peeling the film 1 adhering to the heat seal portion. The air-cooling effect of the heat-sealing portion can be achieved, and the effect of being able to accurately perform the seal energization control for properly controlling the heat-sealing temperature of the heat-sealing device 3A can be achieved.

In the figure, reference numeral 19 is a front roller which is the film opening end of the package storage device 5, and 20 is a rear roller.

The present invention is not limited to this embodiment, and the structure of the packaging device and the structure of the air blow device 7 to be applied can be designed as appropriate. For example, the shape, number and direction of the air injection nozzles 18 are The type of the film 1 and the size of the film bag made of the film 1 can be appropriately designed depending on the circumstances of the apparatus to which the present invention is applied.

[0027]

Since the present invention is configured as described above, it is possible to reliably prevent the film from adhering to the heat-sealing portion of the heat-sealing device after the heat-sealing without hindering the film transfer and the film opening operation. It is possible to provide a film adhering / separating device in a heat sealing device of an excellent packaging device capable of exfoliating an adhered film.

[Brief description of drawings]

FIG. 1 is a schematic configuration plan view of a packaging device.

FIG. 2 is a schematic configuration front view of a packaging device.

FIG. 3 is an explanatory view showing film cutting of the packaging device.

FIG. 4 is a schematic explanatory plan view of the present embodiment.

FIG. 5 is an enlarged front view of the film in the process of being pulled out and transported in the present embodiment.

[Explanation of symbols]

 1 film 2 film supply device 3 heat seal device 4 package 5 package storage device 6 film cutting device 7 air blow device 8 guide body a packaging device

Claims (2)

[Claims] 1. A film supply device for pulling out and guiding a long film having an upper edge side as an open part while being folded back in a half-folded state, a heat sealing device for heat sealing the supplied film, and a bag shape by this heat sealing. In a heat sealing device of a packaging device, which comprises a package storing device for storing a package in a film and a film cutting device for cutting a predetermined position of the film, heat is applied to the film transfer front side of the heat sealing device. A film adhering / separating device in a heat sealing device of a packaging device, wherein an air blow device for injecting air along the film is provided to a heat sealing portion of the sealing device. 2. A film sticking and peeling in a heat seal device of a packaging device according to claim 1, wherein a guide body for restricting an injection direction of the air blown to the air blow device is provided in a protruding state toward the film transfer side. apparatus.