JPH0642602U - Device for opening half-folded film - Google Patents

Abstract

(57) [Summary] (Modified) [Object] To provide a device for smoothly opening a half-folded film without resistance in a heat-shrinkable packaging device for continuously packaging the half-folded film. The half-folded film opening device according to the present invention is a heat-shrinkable packaging device, wherein a woven cloth having good slipperiness and abrasion resistance is fixed to a metal supporting material, and a portion in contact with the film is the woven cloth. The peeling bar 8 formed by is installed between the film guide rollers 5 and 6 and the former 9.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a heat-shrink wrapping device that continuously wraps a half-folded film, and more particularly to an L-type automatic wrapping device that opens a half-folded film smoothly without resistance.

[0002]

[Problems to be solved by conventional techniques and devices]

 A heat-shrink wrapping device that continuously wraps a half-folded film is one that opens the opening while feeding the half-folded film, inserts the object to be packaged, and then packs by heat fusion. Is. Here, as a conventional method for opening a half-folded film, there is a method in which an aluminum release plate having a thickness of 3 to 4 mm is attached in front of the film feeding roller and the film is peeled and opened while being fed, or a round pipe. A method is used in which several air blowing holes are made in the air hole, and compressed air is blown from there to open the film. In addition, a method in which an antiblocking agent is added from the beginning in the film manufacturing process to eliminate the self-adhesiveness of the film is used.

FIG. 2 shows an outline of a conventional device using an aluminum release plate. The film of the roll 1 placed on the film placing roller 2 is fed out by the film drive roller 4, and then passes through the film guide rollers 5 and 6, the film feeding roller 7, and one side of the former 9 in the former 9. Is opened, the package is inserted between the films from this opening side, the film is heat-sealed by the heat-sealing device 12, and the film is heat-shrinked by the hot-air tunnel 13. Non-wrapped items are sealed and packaging is completed. The feeding of the film after the film driving roller 4 is driven by a motor (not shown). In order to peel off the opening of the half-folded film, an aluminum peeling plate is provided between the film placing roller 2 and the film driving roller 4, and here the peeling plate is inserted between the films. As a result, the film is peeled off.

However, if the half-folded film has a slight self-adhesive property, even if the film is peeled off in front of the guide roller, the film is again blocked while passing through several film guide rollers, and the former is blocked. It will not open in front of. In addition, since the resistance to peeling off the film just before entering the former is large, the film cannot be pulled completely by the ear treatment chain, and the ear treatment chain runs idle. Further, there is a problem that the film is entangled with the aluminum film peeling plate.

On the other hand, in the method in which compressed film is blown out from a round pipe to peel off the film, the speed of feeding the half-folded film is faster than the speed of peeling the film, so that the effect cannot be expected. . Further, the film using the antiblocking agent has a problem that the antiblocking agent adheres to the packaging machine and causes mechanical trouble.

[0006]

[Means for Solving the Problems]

 Therefore, an object of the present invention is to provide an opening device for a half-folded film which does not cause such a problem, and has good slipperiness and wear resistance between the film feeding roller 7 and the former 9. The woven cloth has a structure in which a woven cloth is fixed to a metal supporting member, and a peeling bar having a portion in contact with the film formed of the woven cloth is installed. The peeling rod opens the opening of the half-folded film so as to spread it, and the movement to the former is smoothly performed without resistance. Along with this, the conventional peeling plate provided between the film placing roller and the film driving roller causes entanglement of the film and is removed.

In the half-fold film opening device of the present invention, since the half-fold film is opened by the woven cloth portion of the peeling rod installed between the film feeding roller and the former, the woven cloth of the peeling rod is opened. The peeling of the film is promoted by the contact with the film and the increase of the opening angle.

The peeling bar used in the half-folded film opening device of the present invention is a woven cloth that is not easily scratched on the film surface, has good slipperiness, and has wear resistance, and is made of an aluminum material or A woven fabric is used which is fixed to a general steel material so that the portion in contact with the film is formed by the woven cloth. As described above, by using the woven cloth having good slipperiness in the part of the peeling bar that contacts the film, the disadvantage of the conventional aluminum peeling plate that the film is easily entangled is eliminated.

An outline of a heat-shrinkable packaging device incorporating the half-folded film opening device of the present invention is shown in FIG. 1, and an outline of the half-folded film opening device of the present invention is shown in FIG. The half-folding film opening device of the present invention is characterized in that the peeling bar 8 is provided between the film feeding roller 7 and the former 9. The flow of the film in the heat-shrinkable packaging device having the half-folded film opening device of the present invention will be described with reference to FIGS. The film is fed from the half-folded film roll 1 placed on the film placing roller 2 by the film driving roller 4, and is fed from the film feeding roller 7 via the film guide rollers 5 and 6. Next, the opening side of the half-folded film is peeled off by the peeling bar 8 so as to be widened, and the half film is smoothly moved to the former 9. The former 9 is formed by two parallel plate-shaped members, and the former 9 turns the film over and opens one side greatly. Here, the supply conveyor 14 supplies the non-packaged product in the direction of the arrow in FIG. Next, the film is heat-sealed by the heat-sealing device 12. After that, the packaged product is sent to the hot air tunnel 13 by the discharge conveyor 11, the film is heat-shrinked, the packaged product is sealed, and the packaging is completed.

An example of the structure of the peeling bar in the half-folded film opening device of the present invention is shown in FIG. The peeling bar has a structure in which a woven cloth having good slidability and abrasion resistance is fixed to an aluminum material or a general steel material. In the structure shown in FIG. 4-a, a vertically long strip-shaped woven fabric 15 is sandwiched between aluminum rods 14, and pins 16 are engaged at several places. Further, in the structure shown in FIG. 4B, a tubular woven cloth 15 is covered around the aluminum bar 14. The structure shown here is merely an example, and any structure can be adopted as long as the portion that comes into contact with the film is formed of woven cloth. Here, as the vertical thickness of the peeling bar, various thicknesses can be adopted depending on the distance between the film feeding roller 7 and the former 9 and the peeling bar 8, the height of the object to be packed, and the like. Generally, 20-80 mm is preferable. If the thickness of the peeling bar in the longitudinal direction is too thin, the opening angle of the film cannot be made large, so that the film tends to be entangled with the peeling bar. On the other hand, if the peeling bar is too thick in the vertical direction, the peeling resistance of the film is too large, causing problems such as idle rotation of the ear treatment chain. The length of the peeling bar is generally the same as the width of the half-folded film.

[0011]

[Effect of device]

 By using the half-folded film opening device according to the present invention, troubles such as entanglement related to the conventional aluminum peeling plate and the peeling resistance of the film are large, and the work cannot be completely pulled by the ear processing chain, and the work is interrupted Problems such as reduced work efficiency are solved. Moreover, since it is not necessary to use a compressed air blowing device, it leads to cost reduction.

[Brief description of drawings]

FIG. 1 is a schematic view of a heat-shrink packaging device having a half-folded film opening device according to the present invention.

FIG. 2 is a side view showing an outline of a conventional L-type automatic packaging machine.

FIG. 3 is a view showing the concept of a half-folded film opening device according to the present invention.

FIG. 4 is a view showing an embodiment of a peeling bar used in the half-folded film opening device of the present invention.

[Explanation of symbols]

 1 ... Half-folded film roll; 2 ... Film placing roller; 3 ... Conventional peeling plate; 4 ... Film driving roller; 5, 6 ... Film guide roller; 7 ... Film feeding roller Roller; 8 ... Peeling bar according to the present invention; 9 ... Former; 10 ... Ear treatment chain; 11 ... Discharge conveyor; 12 ... Heat fusion device; 13 ... Hot air tunnel; 14 ... Supply conveyor; 15 ... Aluminum bar material; 16 ... Woven fabric; 17 ... Pin.

Claims (1)

[Scope of utility model registration request] 1. A heat shrink wrapping device for continuously wrapping a half-folded film, wherein a woven cloth having good slipperiness and abrasion resistance is fixed to a metal supporting material, and a portion contacting the film is The peeling bar formed of the woven cloth is
A device that opens a half-folded film smoothly without resistance, which is installed between the film guide roller and the former.