JPH05213323A - Sealing device of packaging machine - Google Patents

Abstract

PURPOSE:To continuously, efficiently form firm packages of commodities and improve the appearance of the packages when the commodities are packaged. CONSTITUTION:A film opener 4 sandwiches a commodity 20 between two-fold film 5 that is drawn out of a film roll 6 and a commodity conveyer 2 transfers the commodity 20 in between the film opener 4. A commodity take-out conveyer 11 is provided near the front end of the commodity conveyer 2. A sealing device 1, which cuts a film 5 at a specified position to form the film into a bag shape and welds the cut parts, is installed between the commodity conveyer 2 and the commodity take-out conveyer 11. A film drawing-out roller 14, which closes the opening of the film 5 in which the commodity 20 is sandwiched and draws out the film 5 from the film roll 6, is provided at a specified position on the commodity conveyer 2 side of the sealing device 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention draws a packaging film which is folded in two and rolled into a roll, puts a product between them, and melts and fuses the film at a predetermined position to form a bag. , A packaging device for packaging products.

[0002]

2. Description of the Related Art Conventionally, when a product is wrapped with a heat-shrinkable film folded in two, the film is pulled out from a film roll simply by the frictional force due to the weight of the product along with the movement of the belt conveyor. The film is pulled out by pulling or the leading end of the film is forcibly pulled out by a predetermined distance using a film pulling rod.

[0003]

In the former case of the above-mentioned conventional technique, the film is pulled out only by the weight of the product, so in the case of a light product, the film cannot be pulled out to a predetermined position due to the rotation resistance of the film roll. However, there was a problem that the position of the product was misaligned and the film was wrinkled. Further, in the latter case, there is a problem that it is difficult to pull out to an arbitrary position because a device for pulling out a film that can be moved by a distance for pulling out the film is required and the device becomes large.

Further, if the drawn film is fused and welded as it is to form a bag, there is a problem that the corner portion of the bag projects into a corner in the case of a three-dimensional product. There is also a drawback that the part becomes an obstacle when packing.

The present invention has been made in view of the above-mentioned problems of the prior art, and when a product is folded using a double-folded film, it can be continuously and efficiently and surely packed, and the packing form is also changed. The purpose is to provide a clean packaging device.

[0006]

SUMMARY OF THE INVENTION The present invention has a film roll of a packaging film wound into a roll and a film opening device for inserting a product between the film drawn from the film roll. The product transporting device for transporting the product is provided between the film opening devices, and the product unloading device is provided near the tip of the product transporting device. A sealing device that cuts and cuts into a bag at a predetermined position and welds the cut portion is set, and the opening of the film sandwiching the product is aligned with the predetermined position on the product transport device side of this sealing device. And a film drawing roller for drawing the film from the film roll in response to the movement of the product transport device.

The present invention is also a packaging device provided with a film folding device which is close to the sealing device and folds the corners of the film cut into the bag shape into the inside of the bag.

[0008]

The packaging apparatus of the present invention ensures that the film is pulled out, that the film is free from wrinkles, that the welded and welded portion is clean, and that the packaging form of the product is good.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. The packaging apparatus of this embodiment is shown in FIG.
As shown in FIG. 1, it comprises a sealing device 1 for sealing the opening of the melted packaging film, a product transport belt 2 which is a transport device for feeding products, a film feed 3 and a film opening device 4. The film sealed by the sealing device 1 is
For example, a heat-shrinkable film is folded in two, and is a half-folded film 5 wound in a roll shape, and the wound film roll 6 is attached to the film feed 3. The film opening device 4 includes guide plates 7 and 8 each having an isosceles right triangle shape and a pair of support columns 9 holding the guide plates 7 and 8. The product transport belt 2 includes the pair of support columns 9 and the guide plates 7 and 8.
It is inserted between and. The guide plates 7 and 8 are provided in parallel to the product transport belt 2. Further, the oblique sides 7a, 8a of the right-angled isosceles triangular guide plates 7, 8 are arranged at 45 degrees with respect to the traveling direction of the product transport belt 2. The half-folded film 5 is opened in the upper and lower outer sides of the guide plates 7 and 8 in a folded state to widen the space between the two half-folds, and the oblique side 7 of the guide plates 7 and 8.
The front and back surfaces of the film 5 are reversed by a and 8a and inserted between the guide plates 7 and 8. Then, the film 5 is sandwiched between the guide plates 7 and 8 with the product conveying belt 2 sandwiched therebetween, and the feeding direction of the film 5 is changed by 90 degrees.

The sealing device 1 is a well-known fusing and welding device, which cuts the half-folded film 5 by a heated fusing blade and welds the opening of the cut portion. At the position on the lower side facing the sealing device 1, the seal receiving stand 1
Two are provided. Further, the sealing device 1 is provided with a driving air cylinder 10 for moving up and down. Then, the product conveying belt 2 is sandwiched by the sealing device 1.
On the side opposite to the side, a product unloading belt 11, which is a unloading device for sending out products, is provided.

On the product conveying belt 2 side of the sealing device 1 and on the opening edge side of the double-folded film 5, there is provided a film pull-out roller 14 consisting of a pair of rollers for pulling out the edge portions of the double-folded film 5 together. It is provided.
The film pull-out roller 14 sends out the film 5 together with the product in synchronization with the product transport belt 2 by a driving device (not shown). Further, a pressure-bonding and release lever 16 for the film pull-out roller 14 is provided below the lever 16.

In the method of using the packaging device having the above-described structure, when the product 20 is placed on the product transport belt 2 and the apparatus is activated, the product 20 is sent by the product transport belt 2 and the product 20 is folded between the folded films 5. Goes in. Then, when the product 20 passes under the sealing device 1, the product conveying belt 2 and the product unloading belt 1 are automatically operated by a sensor (not shown).
1 is stopped, the sealing device 1 is activated, and the portion of the leading end of the film 5 which wraps the product 20 is cut from the other portion of the drawn film 5, and at the same time, the cut portion of the film 5 is welded. The product 20 is in a state of being wrapped in a bag made of the film 5. In this state, the product unloading belt 1
The product 20 is unloaded from 1, and the bagged product 20 is further packed.

According to the packaging apparatus of this embodiment, the double-folded film 5 pulled out from the film roll 6 is reliably pulled out with the product 20 sandwiched therebetween, and the fusing and welding portion is cut cleanly without wrinkles. The welding of the opening is also finished neatly.

Next, a packaging apparatus according to a second embodiment of the present invention will be described with reference to FIGS. Here, the same members as those in the above-described embodiment are designated by the same reference numerals and the description thereof will be omitted. In addition to the above-described packaging device, the packaging device of this embodiment further includes a folding device 22 that folds the corners of the film inward on the side of the product unloading belt 11 of the sealing device 1 on the half-folded side of the half-folded film 5. It is provided. Further, a sealing device 15 is also provided on the side of the opening of the film 5 of the product discharge belt 11, and the sealing device 1
5, a pair of film folding devices 23 are provided inside. The film folding devices 22 and 23 include a protrusion 24 for folding and a drive device (not shown). Before the sealing devices 1 and 15 operate, the protrusions 24 push the corners of the bi-fold film 5 inward. After that, the openings of the bi-fold film 5 are fused and welded by the sealing devices 1 and 15.

The operation of the packaging apparatus of this embodiment is shown in FIG.
~ It demonstrates based on FIG. First, the front end of the double-folded film 5 is fused and welded. At this time, as shown in FIG. 5 (A), the film folding device 22 is actuated to fold the corner portion 25 inward before the double-folded film 5 is sealed and weld the ends by fusion. At this time, the product 20 is inserted between the half-folded films 5 and sequentially supplied together with the films. Then, as shown in FIG. 5B, when the film 5 passes under the sealing device 1 with the product 20 contained therein, the product transport belt 2 and the product unloading belt 11 stop, and the film folding device 22 operates. As a result, the corner portion 25 at the seal position is folded inward. Then, as shown in FIG. 6, the sealing device 1 is actuated, and the opening portion of the half-folded film 5 is fused and welded to form the seal line 28 to form a bag shape. Further, when the product 20 is fed by the product unloading belt 11 and positioned on the side of the sealing device 15, the product unloading belt 15 stops, and as shown in FIG. Both end corners 26 of the part are folded inward. After that, the sealing device 15 is activated to seal the opening of the bag-shaped double-folded film 5 and package it in the state shown in FIG. 7.

According to the packaging apparatus of this embodiment, even in the case where a three-dimensional product having a height is continuously packaged by using a folded film, the corner portions 25 of the film after packaging,
26 is folded inward cleanly, and the packaging form is very good. In addition, the fusion-welded seal line 28 is also finished neatly.

The packaging apparatus of the present invention is not limited to the above-mentioned embodiment and can be appropriately set. The film is not folded in two, but a long film wound into a roll is pulled out. Alternatively, the film may be folded in the longitudinal direction by the film opening device, and the product may be sandwiched between them. Further, the product transporting device may be a product pushing device that pushes in a product and installs the product at a predetermined position, other than the belt conveyor, and the transporting means is not limited.
Similarly, as the product discharge device, a discharge device other than the belt conveyor can be applied. Furthermore, the film pull-out roller can be set at an appropriate position, and the material of the roller can also be selected appropriately.

[0018]

The packaging device of the present invention is provided with a sealing device for pulling out the packaging film wound into a roll to wrap the product, cutting it into a bag and separating it, and welding the cut portion. In close proximity to the above, since the film withdrawing roller for pulling out the film from the film roll is provided in accordance with the movement of the above-mentioned product unloading device by aligning the films with each other, the film can be surely drawn out and the position of the product is displaced, There are no wrinkles in the fusion-bonded welded portion and the film itself cannot be pulled out. Further, by the film folding device that folds the corners of the film inward, even in the packaging of a product having a height, the packaging does not have the corners protruding, and the packaging with good appearance becomes possible.

[Brief description of drawings]

FIG. 1 is a perspective view of a packaging device according to a first embodiment of the present invention.

FIG. 2 is a front view of the packaging device of this embodiment.

FIG. 3 is a plan view of the packaging device of this embodiment.

FIG. 4 is a front view of the packaging device according to the second embodiment of the present invention.

FIG. 5 is a schematic view showing the packaging sequence of this embodiment.

FIG. 6 is a perspective view showing a packaging process by the packaging apparatus of this embodiment.

FIG. 7 is a perspective view showing a packaging state by the packaging device of this embodiment.

[Explanation of symbols]

 1,15 Sealing device 5 Two-fold film 2 Product transport belt 4 Film opening device 6 Film roll 11 Product unloading belt 14 Film pulling roller 20 Product 22,23 Film folding device

Claims (3)

[Claims] 1. A film roll of a packaging film wound into a roll, and a film opening device for inserting a product between the film drawn out from the film roll. A product transfer device for transferring products is provided between the product transfer device and the product transfer device provided near the tip of the product transfer device, and the film is formed into a bag shape at a predetermined position between the product transfer device and the product transfer device. A sealing device that cuts and separates and welds the cutting portion is provided, and at a predetermined position on the side of the product transport device of this sealing device,
A packaging device comprising a film pull-out roller for pulling out a film from the film roll corresponding to the movement of the product transport device by aligning the openings of the film sandwiching the product with each other. 2. A film roll of a packaging film wound into a roll, and a film opening device for inserting a product between the film drawn out from the film roll. A product transfer device for transferring products is provided between the product transfer device and the product transfer device provided near the tip of the product transfer device, and the film is formed into a bag shape at a predetermined position between the product transfer device and the product transfer device. A sealing device that cuts and separates and welds the cutting portion is provided, and at a predetermined position on the side of the product transport device of this sealing device,
A film pull-out roller that pulls out the film from the film roll in response to the movement of the product transport device is provided by aligning the openings of the film sandwiching the product with each other, and is separated into the bag shape in the vicinity of the sealing device. A packaging device comprising a film folding device for folding a corner portion of a film inside. 3. A second sealing device is provided for fusing and welding the opening of the bag formed by the sealing device, and both corners of the opening of the bag-like film are provided in the vicinity of the second sealing device. The packaging device according to claim 2, further comprising a pair of folding devices for folding the inside.