JPH0699913A - Packaging machine - Google Patents

Abstract

PURPOSE:To continuously, efficiently perform packaging with a two-folde film by a packaging machine of small size. CONSTITUTION:A film roll 6 with a packaging doubled-folde film 5 wound around it and a film opening device 4 which inserts an article 40 between the packaging doubled-film 5 that is pulled off from the film rolls 6 are provided. An article belt conveyer 2 which conveys the article 40 is laid through the film opening device 4, and an article delivery belt conveyer 11 is located adjacent to the end of the article belt conveyer 2. A sealing device 1 installed between the article belt conveyer 2 and the article delivery belt conveyer 11 cuts off the film 5 into a bag-like shape at a specified position and welds its cut parts. A seal roller 14 located at a specified position on the article delivery belt conveyer 2 side of the sealing device 1 pulls out the film 5 enclosing the article 40 inside from the film roll 40 with the opening of the film 5 closed and seals the opening of the film 5 while it rotates.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention draws a packaging film rolled into a roll, puts a product between two folded states, 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 packaging a product using a heat-shrinkable film folded in two, the opening of the film is sealed by a heat bar attached in a direction parallel to the direction orthogonal to the fold line of the film. It was performed by the sealing device using. This sealing device is used as a so-called L sealer that is independently mounted or assembled in an L shape.

[0003]

In the case of the above conventional technique, a rod-shaped sealing device for sealing the opening of the film in the direction parallel to the fold is provided in the direction parallel to the product feeding direction. Therefore, there is a problem that the length of the packaging device in the product feeding direction becomes long. Also, in the sealing device in the direction orthogonal to the product feeding direction, when the bi-fold film is cut and separated on the product packaging side and the film roll side, when sending the film containing the next product to the product delivery belt side However, the film is pulled out only by the weight of the product, and in the case of a light product, the film cannot be pulled out to the predetermined position due to the rotation resistance of the film roll, and the product may be misaligned or the film may wrinkle. There was a problem of being lost.

The present invention has been made in view of the above-mentioned problems of the prior art, and provides a packaging device capable of continuously and efficiently and reliably packaging a product with a bi-fold film by a small device. The purpose is to provide.

[0005]

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 sandwiching 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 in the vicinity of the front end of the product transporting device, and the film is provided between the product transporting device and the product unloading device. Is provided with a sealing device that cuts and cuts into a bag shape at a predetermined position and welds the cut portion, and aligns the openings of the film sandwiching the product with each other at a predetermined position on the product transport device side of the sealing device. And a sealing roller that seals the opening of the pulled-out film while rotating it.

[0006]

The packaging device of the present invention uses the seal roller to
Along with pulling out the film, the opening of the film is sealed in the product feeding direction to form a bi-fold film in the shape of a bag.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. The packaging device of this embodiment is shown in FIG.
As shown in FIG. 1, it comprises a sealing device 1 for sealing the opening of the 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 this 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, which is a film opening device, includes guide plates 7 and 8 having an isosceles right triangle and a pair of support columns 9 that hold the guide plates 7, 8.
It is inserted between the pair of columns 9 and the guide plates 7 and 8.
The guide plates 7 and 8 are provided in parallel to each other with respect to the product transport belt 2. Further, the oblique sides 7a, 8a of the right isosceles triangle guide plates 7, 8 are arranged at 45 degrees with respect to the traveling direction of the product conveying belt 2. The half-folded film 5 is opened to the upper and lower outer sides of the guide plates 7 and 8 in a folded state to widen the gap between the two half-folds, and the oblique sides 7a and 8a of the guide plates 7 and 8 allow the film 5 to be folded. The front and back surfaces are reversed and inserted between the guide plates 7 and 8. Then, the film 5 sandwiches the product conveying belt 2 between the guide plates 7 and 8, and the feeding direction of the film 5 is changed by 90 degrees in the traveling direction.

The sealing device 1 is a well-known fusing and fusing device, which cuts the double-folded film 5 by a fusing blade which is heated and fusing the opening of the cut portion. At the position on the lower side facing the sealing device 1, the seal holder 1
Two are provided. Further, the sealing device 1 is provided with a driving air cylinder 10 for moving up and down, as shown in FIG. A product unloading belt 11, which is a unloading device for sending out the product, is provided on the opposite side of the seal device 1 from the product transport belt 2.

On the side of the product conveyor belt 2 with respect to the sealing device 1 and on the opening edge side of the bi-fold film 5, the edge parts of the bi-fold film 5 are aligned with each other and pulled out from the film roll 6 and opened. A seal roller 14 including a pair of rollers for sealing the portion is provided.
The seal roller 14 pulls out the film 5 together with the product in synchronization with the product transport belt 2 and seals the opening by a drive device (not shown). Seal roller 14
Is provided with a crimping and releasing lever 16.
As shown in FIG. 4, the seal roller 14 is provided with a heater 22 in each of a pair of rotary shafts 20 and 21, and heats the rollers 23 and 24 at the tips. The outer peripheral portion of the roller 23 is formed in a concave shape, and the fusing and welding blade 26 is provided on the outer peripheral portion of the roller 24 in a protruding state over the entire periphery. Further, the outer peripheral portion of the roller 24 is provided with the film 5 and the roller 23. A pair of ring-shaped elastic members 28 sandwiched therebetween are fused by the welding blade 26.
It is attached with a pinch in between. In addition, the rotary shafts 20 and 21
Is attached to the mounting portion 32, 3 via the bearing 30, 31.
3 are formed so as to rotate in synchronization with each other by gears 34 and 35 meshing with each other.

According to the method of using the packaging device having the above-described structure, when the product 40 is placed on the product transport belt 2 and the apparatus is activated, the product 40 is sent by the product transport belt 2 and the product 40 is folded between the half-folded films 5. Goes in. In the seal roller 14, the fusing blade 26 is heated by the heater 22, the film 5 is sandwiched between the rollers 23 and 24 and pulled out from the film roll 6, and the side opening of the film 5 wrapping the product 40 is formed. Is sealed by the fusion welding blade 26 while rotating. After this, when the product 40 wrapped in the film 5 passes under the sealing device 1, the product transport belt 2 and the product unloading belt 11 are automatically stopped by a sensor (not shown), the sealing device 1 operates, and the film The portion of the tip end of the film 5 which wraps the product 40 is cut from the other part of the film 5 pulled out from the film roll 6, and at the same time, the cut portion of the film 5 is welded with a double-folded opening. Becomes a state of being wrapped in a bag made of film 5. In this state, the product 40 is unloaded from the product unloading belt 11 and passed through a heat tunnel (not shown) to shrink the film 5, and the bagged product 40 is further packed.

According to the packaging apparatus of this embodiment, the film 5 is pulled out from the film roll 6 and at the same time, the side openings are sealed, and the fusion and welding are ensured. it can.

Next, a packaging apparatus according to a second embodiment of the present invention will be described with reference to FIG. 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 the packaging apparatus of this embodiment, a film pressing roller 42 for feeding a film is further provided on the product transport belt 2 side of the sealing apparatus 1 in addition to the above packaging apparatus. In addition, in FIG. 5, the distance between the product conveying belt 2 and the product unloading belt 11 is wide in the feeding direction of the product 40 in the drawing, but this interval can be set to an appropriate interval. In order to prevent the product from falling, this interval is preferably narrow, and a product supporting plate may be attached at the same height as the belt surface. Further, in this embodiment, the film 5 fused and welded by the seal roller 14 is used.
The unnecessary portion 5a on the outer side of is wound around a scrap winding roller (not shown).

According to the packaging apparatus of this embodiment, the seal roller 14 and the film take-up roller 42 are provided, so that the film 5 can be more reliably fed out, and the seal portion formed by the seal roller 14 is more clean and accurate. Is to be sealed.

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 in a roll is pulled out. Alternatively, the film opening device may be used to fold the film in the longitudinal direction so that the product is sandwiched therebetween. Further, the product transporting device may be a product pushing device which pushes in a product and installs the product at a predetermined position in addition to the belt conveyor, and its transporting means is not limited.
Similarly, as the product discharging device, a discharging device other than the belt conveyor can be applied. Furthermore, the number of seal rollers and film pressing rollers can be set in an appropriate number and position, and the material of the rollers can be selected appropriately.

[0015]

Since the packaging apparatus of the present invention is provided with the sealing roller which is close to the sealing apparatus and draws the films from the film roll while aligning them with each other and sealing the folded film opening, the film is surely secured. Since the opening is sealed while being pulled out, the packaging device can be downsized, and the sealing part can be surely and cleanly sealed.

[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 partial cross-sectional view of a seal roller of the packaging device of this embodiment.

FIG. 5 is a partial perspective view of the second embodiment of the packaging device of the present invention.

[Explanation of symbols] 1 sealing device 2 product conveying belt 4 film opening device 5 double-folding film 6 film roll 11 product unloading belt 14 seal roller 40 product

Claims (2)

[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 merchandise conveying device for conveying merchandise is provided between them, and a merchandise carrying-out device is provided in the vicinity of the leading end of the merchandise carrying 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 transportation device of this sealing device
A packaging device provided with a seal roller for pulling out the film from the film roll by aligning the openings of the film sandwiching the product with each other and for sealing the opening of the drawn film while rotating. 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 merchandise conveying device for conveying merchandise is provided between them, and a merchandise carrying-out device is provided in the vicinity of the leading end of the merchandise carrying 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 transportation device of this sealing device
A film holding roller for drawing the film out of the film roll by aligning the openings of the film sandwiching the product with each other, and a seal roller for sealing the opening of the drawn film while rotating. Packaging equipment.