JPS5934573B2 - The best way to get started - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat-shrinkable packaging method and device with improved unsealability, in which when a detachment tape is assembled into a fusion-bonded area of a heat-shrinkable plastic film, the string and plastic tape are removed at the same time. The present invention is characterized in that a wire or the like is inserted in the middle of the separation tape to further improve the ease of opening.

Conventionally, heat-shrinkable packaging methods have been used, but perforations for opening were provided at important points in the heat-shrinkable plastic film used for packaging.

However, perforated plastic films must be handled with great care or they will break. Further, even if the holes are relatively small before shrinking, when the film is heated and shrunk, the holes become large, causing pinholes and significantly lowering the strength. Further, even in a heat-shrinkable package provided with only a conventional village separation tape, the separation tape is required to be strong as the weight of the packaged object increases, making it somewhat difficult to open. The present invention, which was conceived in view of the above points, will be explained in detail with reference to the drawings.
a conveyor 2 that sends out the object to a packaging position, a mechanism that sends out a heat-shrinkable plastic film 4 to wrap the object to be packaged,
At the same time, there is a device that folds and feeds the tape 6 lined with a string 15 or the like to the joint portion of the plastic film and cuts it, a heater bar 5 that thermally bonds the joint portion and cuts off the excess material, and sends out after packaging. In a heat shrink packaging device consisting of a conveyor and a shrink tunnel 11 for shrinking the plastic film, a heat-generating shrinkable plastic film 4 is fed out and synchronously, a separation tape lined with a string 15 or the like is applied to the joint area. a tape folding device 8 for folding back the tape 6; a tape holding part 12 that can be moved back and forth and opened/closed for pulling and extending the folded separation tape by a required dimension; The cutting cutter 3 is provided with protrusions for opening the tape gripping portion at the forward position and at the position where the tape gripping portion is retracted by the required length. As shown in FIG. 2, a wound heat-shrinkable plastic film 4 is unwound in two directions, up and down, so as to cover the object to be packaged 1, and the object to be packaged 1 is fed into the middle by the conveyor 2.

At this time, a seal-breaking tape 6 backed by a string, plastic tape wire, etc. 15 is inserted between the joining points a-a'. At this time, the device for incorporating the seal-breaking tape 6 and the string 15 and the state of fusion bonding are shown in FIG. 3. First, as shown in FIG. The position on the device to be assembled is a-a', which is composed of a tape folding device 8 and a tape gripping device provided on both sides of the conveyor 10, whose position is adjusted by a position detector 9, and the seal is broken. The tape 6, string 15, etc. are each stored in a roll, and each is fed into the section a-a' by a tension roll 7. FIG. 2 shows the installation of a seal-breaking tape 6 lined with string 15, etc., and the tape 6 and string 15 are passed through a tension roll 7 and then passed through a tape folding device 8 equipped with an air cylinder. When folded back as shown in the sectional view, the tape 6 is held in the tape holding part 12 by the spring 13 and pulled out, and when it has been stretched to a predetermined length, the tape 6 is cut by the cutter 3. When the roller 14 is pushed upward by the protrusion on the lower surface, the tape holding part 12 opens (indicated by a two-dot chain line in the figure).
As shown in the BB' cross-sectional view and the enlarged cross-sectional view of tape 6, it is shown that plastic film b is laminated onto paper c. The tearing tape 6 is preferably made of plastic laminated paper, and it is preferable to use a roll of tape that has been pre-slit to the required dimensions. Also,
At this time, as shown in the enlarged sectional view, the string 15 and the like are lined. Next, as shown in FIG. 3, the thermally bonded and cut packages are conveyed to the shrink tunnel 11 by the conveyor 10 in the heater bar 15, where they are heat-shrinked, and as shown in FIG. When the film contracts, it opens to indicate the position where the seal has been broken and comes into close contact with the packaged object. Since the present invention has the above-described structure, when the package is opened, the string 15 lined with the seal-breaking tape 6 at the joint is removed.
You can easily open it by pulling it.

Furthermore, by integrating the production line and packaging line, it can be used as a fully automated packaging system.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and Fig. 1 shows a production line;
The figure is an enlarged explanatory view showing the state of the seal-breaking tape being formed, FIG. 3 is a cross-sectional view showing the bonding state of the seal-breaking tape and the heat-shrinkable plastic film, and FIG. 4 is a cross-sectional view showing the heat-shrinked packaging state. FIG. 5 is a perspective view of a package according to the present invention. 1...Packaged object, 2...Conveyor, 3
...Katsuta 1, 4...Heat shrinkable plastic film, 5... Heater bar 1, 6...
...Seal breaking tape, 7...Tension roll, 8...Tape folding device, 9...
Position detector, 10... Conveyor, 11...
...School link tunnel, 12...tape holding part, 13...spring, 14...roller, 15...string, A, a'. ...joint area, b...plastic film) C...
····paper.

Claims (1)

[Claims] 1. In a heat-shrinkable packaging method using a heat-shrinkable plastic film, when a roll of heat-shrinkable plastic film is fed out from above and below to wrap an object, the heat-shrinkable plastic film is simultaneously A heat-shrinkable packaging method comprising feeding a tearing tape lined with a linear material such as a string that improves unsealability to a plastic film joint, and then thermally bonding the joint and shrinking the joint. 2. A conveyor that sends out the object to be packaged to a packaging position, a mechanism that sends out a heat-shrinkable plastic film to wrap the object, and a mechanism that simultaneously folds back tape lined with string or the like at the joint of the plastic film. The heat shrinkable plastic film is fed out in a heat shrink packaging device that includes a feed and cut device, a heater bar that heat-bonds the joints and cuts off the excess material, a conveyor that sends out after packaging, and a shrink tunnel that shrinks the plastic film. A tape folding device that folds the tearing tape lined with a string or the like in synchronization with the tearing tape, a tape holding part that can move forward and backward and open and close to pull and extend the folded tearing tape by the required dimension, and A cutter that cuts the extended seal-breaking tape to a required size, and a cutter that is provided with protrusions for opening the tape gripping portion at an advanced position and a position where the tape gripping portion is retracted by the required length, respectively. Heat shrink packaging equipment.