JPH0532226A - Packing device - Google Patents

Abstract

PURPOSE:To carry out a very tight packing by using sheet material so as to keep a packed content unmoved by a packing device in which a plurality of contents to be packed are placed between two heat fusing sheet materials, surroundings of each of the packed contents are welded, and then the sheet materials are cut between the packed contents, so that the packed contents are packed in the sheet material one per one package. CONSTITUTION:Both sheet materials 10 and 11 are welded, excluding perforated sealing parts 31 and 31a, by heat sealers 28a to 28c and a heat sealing cutter 29. A temporary package 30 thus obtained is placed in a vacuum chamber 32, the package is vacuumed, the perforated sealing part 31 is welded by a heat sealer 33, so that the perforated sealing part 31a can be welded wholly by a heat sealing cutter 60. By this, a packed content in a bag-shaped sheet material is restricted from moving. Accordingly, the sheet material can be prevented from breaking and the packed contents can be prevented from being injured. Also, the packed contents can be protected from injury in the vacuum process.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging device, and more particularly to placing a material to be packaged between two heat-meltable sheet materials,
The present invention relates to a packaging device in which two sheet materials are welded in the peripheral portion of the article to be packaged and the sheet material is packaged with the sheet material.

[0002]

2. Description of the Related Art Conventionally, as shown, for example, in Japanese Utility Model Application Laid-Open No. 58-79502, an object to be packaged is arranged between two sheets of heat-meltable sheet material, and 2 pieces are provided around the object to be packaged. 2. Description of the Related Art A packaging device in which a sheet material is welded and an object to be packaged is packaged with the sheet material is known. Further, as disclosed in Japanese Utility Model Laid-Open No. 60-182306, a plurality of articles to be packaged are arranged between two sheets of heat-meltable sheet material with a space between each other, and two pieces are provided around each article to be packaged. There is also known a packaging device in which, after welding a sheet of sheet material, the sheet material is cut at a portion between the objects to be packaged, and the objects to be packaged are individually packaged by the sheet material. As described above, the apparatus for simultaneously packaging a plurality of objects to be packaged and separating each of the objects to be packaged later can perform the packaging work particularly efficiently.

In this type of packaging apparatus, as disclosed in, for example, Japanese Utility Model Application Laid-Open No. 58-79502, after the object to be packaged is placed between two sheet materials, the rollers are used as sheet materials. In many cases, the sheet material is welded while being pressed against the surface of the article to be packaged. By doing so, the air between the article to be packaged and the sheet material comes to be evacuated, so that the obtained package has a smaller volume and a good appearance.

[0004]

However, it is extremely difficult to sufficiently satisfactorily discharge the air inside the package even by using the air pushing roller as described above. That is, although the air is relatively well discharged in the portion where the air pushing roller is pressed, it is impossible to discharge the air in the portion where the roller cannot be pressed, that is, the side portion of the packaged object. Has become.

If air remains inside the package in this way, the packaged object may move inside the bag-shaped sheet material during transportation of the package and the sheet material may be damaged. . Further, when the object to be packaged moves in this way, if the object to be packaged is soft, scratches may occur on its surface.

When the above air pushing roller is used, if the object to be packaged is soft, it may be pushed by the roller to cause scratches on its surface or damage such as breakage.

The present invention has been made in view of the above circumstances, and is based on the premise that a plurality of articles to be packaged are packaged at the same time and then separated into individual articles to be packaged. It is an object of the present invention to provide a packaging device capable of extremely tightly packaging an article to be packaged with two sheet materials so that the article to be packaged is not damaged and the article to be packaged does not move. To do.

[0008]

SUMMARY OF THE INVENTION As described above, the packaging apparatus according to the present invention arranges a plurality of articles to be packaged between two sheets of heat-meltable sheet material at intervals. In a packaging device that welds two sheet materials in a peripheral portion, cuts the sheet material between the objects to be packaged, and wraps the objects to be packaged one by one with the sheet material, First fusing means for fusing the sheet material in the peripheral portion of the article to be packaged, leaving some unfused portions, and partially fusing the portions between the article to be packaged, and these fusing sheet materials. The decompression chamber for receiving the article to be packaged in the temporary packaging state by: ◆ The second welding means for welding the unwelded portions of the two sheet materials in the decompression chamber, and the partial portion of the two sheet materials. A third welding means for completely welding all the portions welded to It is characterized by that.

[0009]

When the article to be packaged in the temporary packaging state is placed in the decompression chamber, the air inside the bag-shaped sheet material is sucked and discharged to the outside through the unwelded portion. The sheet material will come into close contact with the object to be packaged. At this time, in order to simplify the structure of the second welding means and the like, even if the unwelded portion is formed only in a narrow area, the unwelded portion passes through the partially welded portion between the objects to be packaged. Air is circulated, and the air around each package can be satisfactorily discharged.

Therefore, if the unwelded portions of these sheet materials are welded by the second welding means, the respective objects to be packaged can be tightly packaged by the bag-shaped sheet material. Then, the partially welded portions of the two sheet materials are completely welded by the third welding means, and the sheet material is cut at a portion between the objects to be packaged. Thus, the sheets are separated from each other while being tightly packed. In such a packaging state, the article to be packaged does not move within the sheet material, so that the sheet material is prevented from being damaged or the article to be packaged is not scratched.

Further, by utilizing the above-mentioned decompression chamber, air can be evacuated from the bag-shaped sheet material without contact, so that the object to be packaged will not be damaged during the deflation step.

In the present invention, the "cutting" of the sheet material between the articles to be packaged as described above means that the sheet material can be easily separated by pulling it in a later step in addition to the complete separation. Including perforations so that things can be separated.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on the embodiments shown in the drawings. FIG. 1 shows a packaging device according to a first embodiment of the present invention. As an example, this device is for packaging a sheet bundle 12 using two moisture-proof papers 10 and 11. The moisture-proof papers 10 and 11 each have a layer of heat-meltable resin, are formed in a long sheet shape, and are wound on respective winding shafts.
It is wound around 13 and 14 in a roll.

On the other hand, the moisture-proof paper 10 is unwound from the rolled state and hung on the rollers 15 and 16, and then hung on the nip roller 17 and stretched in a substantially horizontal direction. Only one is shown). The other moisture-proof paper 11 is also unwound from the wound state and hung on the rollers 19 and 20, and then hung on the nip roller 21 arranged below the nip roller 17 and stretched in a substantially horizontal direction, and both side ends The part is hooked on the nip roller 18 described above. In this way, the moisture-proof papers 10 and 11 are
In the portion from 21 to the nip roller 18, the layers of the heat-meltable resin face each other and face each other.

Both side ends (ears) of the combined moisture-proof papers 10 and 11 are slit by an ear slitter 22 arranged above the roller 18. The slit ear 23 extends downwardly from the roller 18, mates with the other ear, and is passed between a pair of nip rollers 25,26. One of the rollers 25 is rotated by a driving device (not shown), so that the ears 23 are fed downward. In this way, the moisture-proof papers 10 and 11 are conveyed at a constant speed in the longitudinal direction (direction of arrow A). The ears 23 are nip rollers 25, 26.
After passing through, it is cut by the ear cutter 27 to form the ear tip 23a.

The sheet bundle 12, which is the object to be packaged, is conveyed in the direction of arrow B by a known conveying means (not shown), for example, three by three, and when it reaches the position shown by arrow C, the moisture-proof paper is conveyed in the next direction. Is inserted between the two moisture-proof papers 10 and 11 which are sent out to and are combined with each other. It should be noted that the three sheet bundles 12 are conveyed with a slight gap therebetween in the width direction of the moisture-proof paper.

Nip rollers 17, 21 and nip roller 18
Between the heat sealers 28a, 28b, 28 which form the first welding means together with the two ear slitters 22 described above.
c and 28d are arranged. Heat sealer 28a, 28d
Are arranged on the right side and the left side of the moisture-proof papers 10 and 11, respectively, and the heat sealers 28b and 28c are arranged between the respective sheet bundles 12, and these heat sealers 28a to 28d are
Both of the moisture-proof papers 10 and 11 are heat-welded in the longitudinal direction (conveying direction) at each part.

The heat sealer 28d is a moisture-proof paper 10,
The other three heat sealers 28a, 28b, 28c are formed so as to completely weld 11 and the two moisture-proof papers 10, 11 are formed so as to be welded in a perforated manner.
The two ear slitters 22 described above slit the moisture-proof papers 10 and 11 outside the portions where the heat sealers 28a and 28d at the left and right ends are welded, respectively.

Next, both the moisture-proof papers 10 and 11 are a bundle of three sheets 12.
And another three sheet bundles 12 sent in a separate supply unit from them, are heat-welded by a heat seal cutter 29. The heat-seal cutter 29 extends over the entire width of the moisture-proof papers 10 and 11 and heat-bonds the moisture-proof papers 10 and 11 in the width direction at two positions apart from each other in the conveyance direction (total welding), and welds them. The moisture-proof papers 10 and 11 are cut in the width direction between the portions.

As described above, the bag-shaped moisture-proof paper 1
Temporary wrapping body 3 in which a sheet bundle 12 is wrapped in threes by 0 and 11
You get 0. Since the heat sealing by the heat sealers 28a to 28d is performed as described above, in this temporary package 30, the perforated seal portion 31 is formed at one edge portion, and the perforated portion is also formed between the sheet bundles 12. The sealing portion 31a remains.

This temporary package 30 is intermittently conveyed, is sent to a vacuum chamber 32 whose inside is decompressed, and is temporarily stopped there. Then, the air inside the temporary package 30 is sucked and removed to the outside through the unwelded portion of the perforated seal portion 31, so that the moisture-proof papers 10 and 11 come into close contact with the sheet bundles 12 from above, below, left and right. .. Although the perforated seal portion 31 is present outside the rightmost sheet bundle 12, the air can flow through the unfused portion of the perforated seal portion 31a between the sheet bundles 12, so that the left end and The air around the central sheet bundle 12 can also be extracted well.

Next, the perforated seal portion 31 is completely welded by the heat sealer 33 as the second welding means arranged in the vacuum chamber 32. As described above, since the air is removed from the temporary package 30 only from the perforated seal portion 31, the heat sealer 33 as the second welding means can be simple.

The package 30A thus obtained is discharged from the vacuum chamber 32, taken out to the position indicated by the arrow D by a known means (not shown), and then intermittently conveyed in the direction of the arrow E. This package 30A is then heat-welded by a heat-seal cutter 60 as a third welding means.
This heat seal cutter 60 heat-bonds (totally welds) the moisture-proof papers 10 and 11 at the perforated seal portions 31a between the sheet bundles 12, and separates the moisture-proof papers 10 and 11 so as to divide each welded portion into two. Disconnect.

Through the above steps, a package 40 in which each sheet bundle 12 is packaged with the bag-shaped moisture-proof papers 10 and 11 is obtained. In this package 40, the moisture-proof papers 10 and 11 are in close contact with the sheet bundle 12 as described above, and are tightly packed. Therefore, when the package 40 is transported later, the sheet bundle 12 does not move in the moisture-proof papers 10 and 11, and thus the moisture-proof paper 1 is moved by the moved sheet bundle 12.
It is possible to prevent the sheets 0 and 11 from being damaged or the sheets of the sheet bundle 12 from being scratched.

In addition, the temporary package 30 by the vacuum chamber 32
Since the air is removed from the temporary package 30 without contact, each sheet of the sheet bundle 12 is not scratched due to the air removal process.

Next, a second embodiment of the present invention will be described with reference to FIG. In FIG. 2, the same elements as those shown in FIG. 1 are designated by the same reference numerals, and the duplicated description thereof will be omitted.

In the apparatus of the second embodiment, the package 30A discharged from the vacuum chamber 32 is heat-welded at the perforated seal portion 31a between the sheet bundles 12 by the heat sealer 61 as the third welding means. (Completely welded). Then, in the welded portion, next, by the slitter 62,
The package 30A is cut and separated.

In the apparatus shown in FIGS. 1 and 2 described above, the heat sealer 28d may be the same as the other three heat sealers 28a, 28b, 28c.
By doing so, in the temporary package 30, two perforated seal portions 31 that open to the outside are formed,
Air can be evacuated better in the vacuum chamber 32. If you do so, the vacuum chamber 32
Inside, another heat sealer similar to the heat sealer 33 may be provided.

When the size of the sheet bundle 12 is changed, the feed amounts of the moisture-proof papers 10 and 11 and the temporary package 30 are changed, and the heat sealers 28a to 28d, and the heat sealer 61 and the slitter 62 in the apparatus of FIG. This can be dealt with by changing the position of.

[Brief description of drawings]

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

FIG. 2 is a schematic perspective view showing a second embodiment device of the present invention.

[Explanation of symbols]

 10, 11 Moisture-proof paper 12 Sheet bundle 25, 26 Nip rollers 28a-d, 33, 61 Heat sealer 29, 60 Heat seal cutter 30 Temporary package 31, 31a Perforated seal part 32 Vacuum chamber 40 Package 62 Slitter

Claims (1)

Claim: What is claimed is: 1. A plurality of articles to be packaged are arranged between two sheets of heat-fusible sheet material at intervals, and the two sheet materials are provided around the respective articles to be packaged. In a packaging apparatus for cutting a sheet material between portions to be packaged after welding, and packaging the packaged objects one by one with the sheet material, the two sheet materials are wrapped around the packaged object. First welding means for partially welding the portions between the articles to be packaged while leaving some unwelded portions remaining, and the packaged article in a temporary packaging state due to these sheet materials that have been welded A decompression chamber for receiving an object; a second welding means for welding the unwelded portions of two sheet materials in the decompression chamber; and a second welding means for completely welding the partially welded portions of the two sheet materials. 3. A packaging device comprising the welding means of 3.