JP6548316B1 - Package body manufacturing system, and package body manufacturing method - Google Patents

Abstract

A package body, a package body manufacturing system, and a package body manufacturing method that exhibit a buffering function by an independent air chamber are provided. A package manufacturing system includes a combination film forming apparatus that forms a combination film in which a shrink film and a non-shrink film are stacked, and a first package that forms a first package by wrapping an article with the combination film. A body forming apparatus and a second package forming apparatus for forming a second package from the first package. The combination film forming apparatus forms a joint for joining the shrink film and the non-shrink film. The first package forming apparatus forms the first package such that the non-shrink film is disposed outside the shrink film. A 2nd package body formation apparatus forms the independent air chamber filled with air by introduce | transducing air in the division enclosed by the shrink film, the non-shrink film, and the coupling | bond part. [Selection] Figure 4

Description

  The present invention relates to a package manufacturing system, a package manufacturing method, and a package.

  A package formed by heat shrinking a shrink film which wraps an article is known.

  As a related art, Patent Document 1 discloses a high buffer package. The high buffer package described in Patent Document 1 comprises a base material comprising a heat-shrinkable foamed plastic film, and a coated film comprising a non-heat-shrinkable plastic film intermittently joined to the surface of the base material. Prepare. In the high buffer package described in Patent Document 1, the base material is thermally shrunk, and the non-joined portion of the coated film bulges along with the thermal contraction.

Microfilm of JP-A-62-98861 (JP-A-64-2780)

  In the high buffer package described in Patent Document 1, the bulging portion exerts a buffer effect. However, in the high buffer package described in Patent Document 1, air is freely released from the space inside the bulging portion, so the air in the space inside the bulging portion does not contribute to buffering.

  Then, the object of the present invention is to provide a package, a package manufacturing system, and a package manufacturing method which exerts a buffer function by an independent air chamber.

  Hereinafter, means for solving the problems will be described using numbers and symbols used in the mode for carrying out the invention. These reference numerals and symbols are added in parentheses as a reference to show an example of the correspondence between the description of the claims and the embodiments for carrying out the invention. Therefore, the scope of the claims should not be interpreted as being limited by the description in parentheses.

  The package production system according to some embodiments comprises a combination film forming apparatus (4) for forming a combination film (11) in which a shrink film (12) and a non-shrink film (14) are stacked, and the combination film (4) The first package forming device (5) forming the first package (1) by wrapping the article (M) in 11), and heat shrinking the shrink film (12) of the combination film (11) And a second package forming device (6) for forming a second package (2) from the first package (1). The combination film forming apparatus (4) forms a bonding portion (16) for bonding the shrink film (12) and the non-shrink film (14). The first package forming device (5) forms the first package (1) such that the non-shrink film (14) is disposed outside the shrink film (12). The second package forming device (6) introduces air into a section (SC) surrounded by the shrink film (12), the non-shrink film (14), and the coupling portion (16). To form an independent air chamber (AC) filled with air.

  In the package production system, the first package (1) may have a first space (SP1) between the shrink film (12) and the article (M). The second package forming device (6) may be configured to move the air in the first space (SP1) to the independent air chamber (AC).

  In the package production system, the combination film forming apparatus (4) surrounds the entire circumference of the compartment (SC) to be the independent air chamber (AC) when viewed from the direction perpendicular to the combination film (11). May form the coupling portion (160).

  In the package manufacturing system, the first package forming device (5) may include an air removing device (58). The air removing device (58) may discharge the air in the shrink film (12) to the outside of the shrink film (12) by pressing the non-shrink film (14).

  In the package manufacturing system, the combination film forming apparatus (4) includes a first pinch roller (44), a welding device (45) disposed downstream of the first pinch roller (44), and the welding. And a second pinch roller (46) located downstream of the device (45). The moving speed of the outer surface of the second pinch roller (46) may be greater than the moving speed of the outer surface of the first pinch roller (44).

  The package in some embodiments comprises an article (M), a shrink film (12) disposed to surround the article (M), and a non-shrink film disposed on the outside of the shrink film (12). (14), a joint portion (16) for joining the shrink film (12) and the non-shrink film (14), and a plurality of independent air chambers (AC). Each of the plurality of independent air chambers (AC) is surrounded by the shrink film (12), the non-shrink film (14), and the joint portion (16).

  In the package, the movement of air from the inside of the plurality of independent air chambers (AC) to the outside of the plurality of independent air chambers (AC) may be restricted.

  In the package, a plurality of needle holes (12 h) may be formed in the shrink film (12) defining the inner walls of the plurality of independent air chambers (AC).

  In the package, the article (M) may be sealed by the non-shrink film (14).

  The package manufacturing method according to some embodiments includes a combination film forming step of forming a combination film (11) in which a shrink film (12) and a non-shrink film (14) are overlapped, and the combination film (11) A first package forming step of forming a first package (1) by wrapping an article (M), and heat shrinking the shrink film (12) of the combination film (11); And a second package forming step of forming a first package (1) to a second package (2). The combination film forming step has a bonding portion forming step of forming a bonding portion (16) for bonding the shrink film (12) and the non-shrink film (14). In the first package forming step, the shrink film (12) is disposed outside the article (M), and the non-shrink film (14) is disposed outside the shrink film (12). Form a first package (1). In the second package forming step, air is introduced by introducing air into a section (SC) surrounded by the shrink film (12), the non-shrink film (14), and the joining portion (16). Form an independent air chamber (AC) that acts as a cushion.

  According to the present invention, it is possible to provide a package, a package manufacturing system, and a package manufacturing method which exert a buffer function by an independent air chamber.

FIG. 1 is a functional block diagram schematically showing a package manufacturing system in the first embodiment. FIG. 2: is a figure which shows typically 1 process of the package manufacturing method in 1st Embodiment. FIG. 3: is a figure which shows typically 1 process of the package manufacturing method in 1st Embodiment. FIG. 4: is a figure which shows typically 1 process of the package manufacturing method in 1st Embodiment. FIG. 5 is a cross-sectional view taken along line B-B in FIG. FIG. 6 is a flowchart showing an example of the method of manufacturing a package according to the first embodiment. FIG. 7 is a schematic cross-sectional view schematically showing a package manufacturing system in the second embodiment. FIG. 8 is a schematic cross-sectional view schematically showing a combination film forming apparatus. FIG. 9 is a schematic plan view schematically showing the welding apparatus. FIG. 10 is a schematic plan view schematically showing the welding apparatus. FIG. 11 is a schematic cross-sectional view schematically showing the first package forming device. FIG. 12 is a schematic cross-sectional view schematically showing a second package forming device. FIG. 13A is a flowchart showing an example of a method of manufacturing a package in the second embodiment. FIG. 13B is a flowchart showing an example of the method of manufacturing a package in the second embodiment. FIG. 14: is a figure which shows typically a mode that the air in a shrink film moves to an independent air chamber by heating a 1st package.

  Hereinafter, the package 2, the package manufacturing system 3 and the package manufacturing method according to the embodiment will be described with reference to the drawings. In the following description, members and portions having the same functions are denoted by the same reference numerals, and repeated descriptions of members and portions denoted by the same reference numerals are omitted.

(Definition of terms)
In the present specification, the “downstream side” means the downstream side in the transfer direction of the shrink film 12 (or the combination film 11). Also, “upstream side” means the upstream side in the transport direction of the shrink film 12 (or the combination film 11).

First Embodiment
A package 2A, a package manufacturing system 3A, and a package manufacturing method according to the first embodiment will be described with reference to FIGS. 1 to 6. FIG. 1 is a functional block diagram schematically showing a package manufacturing system 3A in the first embodiment. FIGS. 2 to 4 are diagrams schematically showing one step of the method for manufacturing a package in the first embodiment. FIG. 5 is a cross-sectional view taken along line B-B in FIG. FIG. 6 is a flowchart showing an example of the method of manufacturing a package according to the first embodiment.

(Packaging body manufacturing system 3A)
An example of the package manufacturing system 3A in the first embodiment will be described. The package production system 3A is a system for producing a package 2A in which an article M is packaged with a combination film 11 including a shrink film 12 and a non-shrink film 14 as illustrated in FIG. 4.

  As shown in FIG. 1, the package production system 3 </ b> A includes a combination film forming apparatus 4, a first package forming apparatus 5, and a second package forming apparatus 6.

  As shown in FIG. 2, the combination film forming apparatus 4 is an apparatus for forming a combination film 11 in which the shrink film 12 and the non-shrink film 14 are superimposed. The combination film forming apparatus 4 includes a bonding device (for example, a welding device) that bonds the shrink film 12 and the non-shrink film 14. More specifically, the combination film forming apparatus 4 bonds the second major surface 12 b of the shrink film 12 and the first major surface 14 a of the non-shrink film 14. The combination film forming device 4 (more specifically, the bonding device) forms a bonding portion 16 (for example, a welded portion) that bonds the shrink film 12 and the non-shrink film 14.

  In the example shown in FIG. 2, the shrink film 12 is provided with a through hole 12 h. The through holes 12 h are holes extending from the first main surface 12 a to the second main surface 12 b of the shrink film 12, and allow air to move from the first main surface 12 a side to the second main surface 12 b side.

  The non-shrink film 14 is a gas impermeable (more specifically, air impermeable) film. In the example shown in FIG. 2, the non-shrink film 14 is not provided with a through hole which allows the passage of air.

  As shown in FIG. 3, the first package forming device 5 is a device that forms the first package 1 </ b> A by wrapping the article M with the combination film 11. The first package 1A corresponds to an intermediate product before being subjected to shrink processing. In the first package 1A, a first space SP1 exists between the shrink film 12 and the article M. The air in the first space SP1 is used as air supplied into an independent air chamber AC described later.

  The first package forming device 5 forms the first package 1A such that the non-shrink film 14 is disposed on the outside of the shrink film 12. As the first package forming device 5, any device capable of performing the process of packaging the article M with a film can be adopted.

  As shown in FIG. 4, the second package forming device 6 forms a first package (1) to a second package (2) by thermally shrinking the shrink film 12 of the combination film 11. It is an apparatus. The second package forming device 6 includes a heat shrinking device such as a shrink tunnel. The heat shrink device heat shrinks the shrink film 12 of the combination film 11.

  In addition, the second package forming device 6 is filled with air by introducing air into the section SC surrounded by the shrink film 12, the non-shrink film 14, and the bonding portion 16 (for example, a welded portion). Form an independent air chamber AC. In the example illustrated in FIG. 4, the second package forming device 6 introduces air into the plurality of sections SC surrounded by the shrink film 12, the non-shrink film 14, and the bonding portion 16 to form air. To form a plurality of independent air chambers AC filled with

  The mechanism by which air is introduced into the area (in other words, the independent air chamber AC) surrounded by the shrink film 12, the non-shrink film 14 and the joint portion 16 will be described.

  The shrink film 12 is shrunk by the heating by the second package forming device 6 (more specifically, the heat shrinking device). As the shrink film 12 shrinks, the distance between the two bonding portions 16 decreases. For example, in the example shown in FIG. 4, the distance L2 between the two coupling portions 16 in the second package (2A) is shorter than the distance L1 between the two coupling portions 16 in the first package 1A. As the distance between the bonding portions 16 is shortened, the non-shrink film 14 bulges away from the article M. With the expansion, air is introduced into the area surrounded by the shrink film 12, the non-shrink film 14, and the joining portion 16 (in other words, the independent air chamber AC).

  More specifically, in the example shown in FIG. 4, when the shrink film 12 is contracted by the heating by the second package forming device 6, the first space SP1 (in other words, between the shrink film 12 and the article M) Air moves from the space) to the independent air chamber AC (in other words, the area between the shrink film 12 and the non-shrink film 14). The movement of the air is performed through a through hole 12 h provided in the shrink film 12.

  In the package production system 3A in the first embodiment, an air-filled independent air chamber AC can be formed between the shrink film 12 and the non-shrink film 14. The independent air chamber AC functions as an air cushion. The package manufacturing system 3A in the first embodiment can manufacture a package 2A that exerts a buffer function by the independent air chamber AC.

  In the example described in FIG. 4, the second package forming device 6 moves the air in the first space SP1 between the shrink film 12 and the article M to the independent air chamber AC. For this reason, the length L4 of the second package (2A) shown in FIG. 4 is significantly shorter than the length L3 of the first package 1A. Therefore, the second package forming device 6 shown in FIG. 4 can form the second package (2A) having a small length in the longitudinal direction. Since the second package (2A) has a small length in the longitudinal direction, it is possible to reduce the size of the outer casing or the case for housing the second package (2A).

(Packaging body 2A)
Subsequently, an example of the package 2A in the first embodiment will be described.

  In the example shown in FIG. 4, the package 2A includes an article M, a shrink film 12 disposed so as to surround the article M, a non-shrink film 14 disposed outside the shrink film 12, and a shrink film 12 A bonding portion 16 (e.g., a welded portion) for bonding the non-shrink film 14 and a plurality of independent air chambers AC are provided.

  In the example described in FIG. 4, each of the plurality of independent air chambers AC is surrounded by the shrink film 12, the non-shrink film 14, and the bonding portion 16 (e.g., a welded portion). Each of the plurality of independent air chambers AC functions as an air cushion. In other words, the package 2A in the first embodiment is a package that exerts a buffer function by the independent air chamber AC. In the example described in FIG. 4, the package 2 </ b> A has a plurality of independent air chambers AC in a cross section parallel to the longitudinal direction of the package 2 </ b> A. And each independent air room AC functions as an air cushion.

  In the package 2A illustrated in FIG. 4, the movement of air from the inside of the independent air chamber AC to the outside of the independent air chamber AC is limited. In the example described in FIG. 4, the shrink film 12 covers the article M in a tension state (a state in which a tension is applied). Therefore, in order for the air in the independent air chamber AC to move to the area inside the shrink film 12 through the through holes 12 h, it is necessary to expand the shrink film 12 in a tension state. Since such expansion is difficult, the air in the independent air chamber AC is restricted from moving to the area inside the shrink film 12 through the through holes 12 h.

  When the movement of air from the inside of the independent air chamber AC to the outside of the independent air chamber AC is restricted, the buffering effect of the independent air chamber AC is improved.

  From the viewpoint of limiting the movement of air from within the independent air chamber AC to the outside of the independent air chamber AC, the through holes 12h provided in the shrink film 12 defining the inner walls of the plurality of independent air chambers AC have needle holes (in other words, needle holes). For example, it is preferable that the hole is a hole formed by a needle-like member. Due to the small hole diameter of the through hole 12h, the movement of air from the inside of the independent air chamber AC to the outside of the independent air chamber AC is more effectively limited. In addition, the hole diameter of 12 h of through-holes is 0.05 mm or more and 2 mm or less, 0.1 mm or more and 2 mm or less, or 0.1 mm or more and 1 mm or less, for example.

  In the package 2A described in FIG. 4, the entire article M is sealed by the non-shrink film 14. In this case, there is no possibility that foreign matter gets inside the non-shrink film 14. In the example described in FIG. 4, the non-shrink film 14 is a non-perforated film and is a gas impermeable (more specifically, air impermeable) film. Therefore, in the example described in FIG. 4, there is no possibility that unintended types of gas may be mixed inside the non-shrink film 14.

  As described above, since the package 2A is compact in length L4 in the longitudinal direction, the package 2A can be accommodated in a small exterior or case. Further, since the package 2A itself is provided with an air cushion, the article M is protected from an impact when the package 2A is transported by being accommodated in a case or case.

  The package 2A shown in FIG. 4 is innovative in that two seemingly contradictory requirements for compactness in size and improvement in buffer function are satisfied by a shrink package with an independent air chamber.

  Furthermore, in the package 2A according to the first embodiment, when the plurality of packages 2A are stored in a case (for example, a cardboard box, a plastic case, etc.) and transported, a separate buffer (for example, a buffer sheet) There is no need to put a buffer bag etc. in the case. Alternatively, the number of separate cushioning materials (eg, cushioning sheets, cushioning bags, etc.) to be put into the case may be small. Therefore, more packages 2A can be packed in the case. Moreover, the increase in the packaging cost accompanying putting a shock absorbing material in a case, and the increase of the waste (unused shock absorbing material) after unpacking are suppressed.

  In the example described in FIG. 4, the package 2 </ b> A includes two lateral seal parts 17 (a lateral seal part 17 a on the front side and a lateral seal part 17 b on the rear side). Further, in the example shown in FIG. 5, the package 2 </ b> A includes one vertical seal portion 18. In other words, the package 2A is a package (pillow package) including the two horizontal seal portions 17 and the one vertical seal portion 18.

  The pillow package is a package that can be manufactured continuously by feeding an article to a tubular film. Therefore, in the case where the package 2A in the first embodiment is a pillow package, the above-described effects (the effect that the size in the longitudinal direction is made compact and the effect that the buffer function is improved) In addition, the effect of improving the manufacturing efficiency of the shock absorbing packaging body 2A is achieved.

  In FIG. 5, the direction from the article M toward the vertical seal portion 18 is defined as downward, and the direction from the vertical seal portion 18 toward the article M is defined as upward. In the example shown in FIG. 5, as indicated by the arrow AR1, the independent air chamber AC exists below the article M, and as shown by the arrow AR2, the independent air chamber AC exists above the article M, and the arrow Independent air chambers AC exist on both sides of the article M as indicated by AR 3 and AR 4. In the example shown in FIG. 5, since the independent air chambers AC exist above, below, and on both sides of the article M, the article M is protected against impact from all directions.

  In the example shown in FIG. 5, the independent air chamber AC is a closed area surrounded by the shrink film 12 and the non-shrink film 14 in a cross section perpendicular to the longitudinal direction of the package 2A. In the example shown in FIG. 5, the package 2A has one closed region (in other words, one independent air chamber AC) in a cross section perpendicular to the longitudinal direction of the package. Alternatively, the package 2A may have a plurality of closed regions (in other words, a plurality of independent air chambers AC) in a cross section perpendicular to the longitudinal direction of the package.

  In the example shown in FIG. 5, the independent air chamber AC has a C-shape in a cross section perpendicular to the longitudinal direction of the package 2A. More specifically, the portion corresponding to the vertical seal portion 18 corresponds to the C-shaped opening portion.

  In the present specification, the longitudinal direction of the package 2A having the vertical seal portion 18 is defined as the direction along the vertical seal portion 18. Therefore, in the present specification, even when the length of the transverse seal portion 17 is longer than the length of the longitudinal seal portion 18, the longitudinal direction of the package 2A is not a direction parallel to the transverse seal portion 17, The direction is parallel to the vertical seal portion 18.

(Packaging body manufacturing method)
Subsequently, an example of a method of manufacturing a package in the first embodiment will be described.

  As shown in FIG. 2, in the first step ST1, a combination film 11 in which the shrink film 12 and the non-shrink film 14 are stacked is formed. The first step ST1 is a combination film forming process. The first step ST1 includes a bonding portion forming step of forming a bonding portion 16 (for example, a welding portion) for bonding the shrink film 12 and the non-shrink film 14. The first step ST1 is performed using a combination film forming apparatus 4 (for example, a welding apparatus such as a heat sealer or an ultrasonic welding apparatus). By the first step ST1, the combination film 11 which is a laminate of the shrink film 12 and the non-shrink film 14 is formed.

  As shown in FIG. 3, in the second step ST2, the first package 1A is formed by wrapping the article M with the combination film 11. The second step ST2 is a first package forming step. The second step ST2 is performed in a state where the non-shrink film 14 is disposed outside the shrink film 12. In other words, in the second step ST2, the first package 1A in which the shrink film 12 is disposed outside the article M and the non-shrink film 14 is disposed outside the shrink film 12 is formed. In the second step ST2, a first package forming device 5 (for example, a film forming machine for forming the strip-shaped combined film 11 into a cylindrical shape, an article supply conveyor for supplying the articles M into the tubular combined film 11, etc.) It is executed using.

  As shown in FIG. 4, in the third step ST3, the shrink film 12 of the combination film 11 is thermally shrunk to form the first package 1A to the second package (2A). The third step ST3 is a second package forming step. Also, in the third step ST3, an independent air that functions as an air cushion by introducing air into the section SC surrounded by the shrink film 12, the non-shrink film 14, and the bonding portion 16 (for example, a welded portion) A room AC is formed. The third step ST3 is performed using a second package forming device 6 (for example, a heat shrinking device such as a shrink tunnel).

Second Embodiment
A package 2B, a package manufacturing system 3B, and a method of manufacturing a package according to the second embodiment will be described with reference to FIGS. 7 to 14. FIG. 7 is a schematic cross-sectional view schematically showing a package manufacturing system 3B in the second embodiment. FIG. 8 is a schematic cross-sectional view schematically showing the combination film forming apparatus 4. 9 and 10 are schematic plan views schematically showing the welding device 45. FIG. FIG. 11 is a schematic cross-sectional view schematically showing the first package forming device 5. FIG. 12 is a schematic cross-sectional view schematically showing the second package forming device 6. FIG. 13A and FIG. 13B are flowcharts showing an example of a method of manufacturing a package in the second embodiment. FIG. 14: is a figure which shows typically a mode that the air in shrink film 12 moves to independent air chamber AC, when 1st package 1B is heated.

  In the second embodiment, differences from the first embodiment will be mainly described. On the other hand, in the second embodiment, the repeated description of the items described in the first embodiment is omitted. Therefore, it goes without saying that the matters described in the first embodiment can be applied to the second embodiment even if not explicitly described in the second embodiment.

  As shown in FIG. 7, the package manufacturing system 3B according to the second embodiment includes a combination film forming apparatus 4, a first package forming apparatus 5 that forms the first package 1B, and a first package 1B. And a second package forming device 6 for forming a second package (2B).

(Combined film forming device 4)
In the example described in FIG. 8, the combination film forming device 4 includes a welding device 45 (a welding device is an aspect of a bonding device) that welds the shrink film 12 and the non-shrink film 14. The combination film forming apparatus 4 has a plurality of through holes 12 h (for example, a first winding body 41 around which the shrink film 12 is wound, a second winding body 42 around which the non-shrink film 14 is wound, and the shrink film 12). At least one of a punching machine 43 forming a plurality of needle holes, a first pinch roller 44 disposed upstream of the welding device 45, and a second pinch roller 46 disposed downstream of the welding device 45 You may have one.

  In the example shown in FIG. 8, the shrink film 12 is unrolled from the first wound body 41. The shrink film 12 is a film which shrinks by being heated by a heat shrink device 61 described later. The thermal contraction rate of the shrink film 12 is, for example, more than 5%, more than 10%, or more than 20%. The thermal contraction rate of the shrink film 12 can be measured, for example, as follows. Two black marks are attached on the shrink film 12 before heating by the heat contraction device 61, and the distance LT1 between the two black marks is measured. In the shrink film 12 heated by the heat shrink device 61 and then removed from the heat shrink device 61, the distance LT2 between the two black marks is measured. At this time, (LT1-LT2) / LT1 is the thermal contraction rate of the shrink film 12. The two black marks are disposed, for example, along the longitudinal direction of the shrink film 12.

  The material of the shrink film 12 is optional as long as it has heat shrinkability, but the material of the shrink film 12 is, for example, polyolefin, polyester, polystyrene or the like.

  In the example shown in FIG. 8, the non-shrink film 14 is unrolled from the second wound body 42. The non-shrink film 14 is a film whose thermal contraction rate by heating by the thermal contraction device 61 is smaller than the thermal contraction rate of the shrink film 12 by heating by the thermal contraction device 61. The thermal contraction rate of the non-shrink film 14 is, for example, 10% or less, 5% or less, 4% or less, or 3% or less. The thermal contraction rate of the non-shrink film 14 can be measured, for example, as follows. Two black marks are attached on the non-shrink film 14 before heating by the heat shrink device 61, and the distance LT3 between the two black marks is measured. In the non-shrink film 14 heated by the heat shrink device 61 and then removed from the heat shrink device 61, the distance LT4 between the two black marks is measured. At this time, (LT3-LT4) / LT3 is the thermal contraction rate of the non-shrink film 14. The two black marks are disposed, for example, along the longitudinal direction of the non-shrink film 14.

  The material of the non-shrink film 14 is optional as long as it has a lower heat shrinkability than the shrink film 12, but the non-shrink film 14 is, for example, a laminate of polyethylene terephthalate (PET) and polyethylene (PE) ( Laminate film). The laminate (for example, a laminate of PET and PE) constituting the non-shrink film 14 may contain an aluminum foil or an aluminum deposited film. As the non-shrink film 14, a laminate (laminate film) having a plurality of layers may be employed, or a single layer film may be employed. In general, the laminate film has a low thermal contraction rate. Further, as the non-shrink film 14, a film thicker than the shrink film 12 may be adopted. A thick film generally has a low thermal shrinkage.

  In the example shown in FIG. 8, the combination film forming apparatus 4 has a superposition roller R <b> 2 for laminating the shrink film 12 and the non-shrink film 14. Further, in the example shown in FIG. 8, the perforator 43 is disposed between the first wound body 41 and the overlapping roller R2. For this reason, the perforation machine 43 forms the through holes 12 h only in the shrink film 12 and does not form the through holes in the non-shrink film 14. The width of the shrink film 12 superposed by the superposition roller R2 may be the same as the width of the non-shrink film 14 or may be smaller than the width of the non-shrink film 14.

  The perforator 43 is, for example, a perforating roller R1 having a plurality of needles disposed on the outer peripheral surface. The shrink film 12 contacts the perforation roller R1 to form a plurality of through holes 12h in the shrink film 12.

  In the example described in FIG. 8, the first pinch roller 44 comprises two rollers R3, R4. At least one of the two rollers R3 and R4 is a drive roller. The shrink film 12 and the non-shrink film 14 pass between the two rollers R3 and R4 and are sent downstream of the two rollers R3 and R4.

  In the example described in FIG. 8, the second pinch roller 46 comprises two rollers R5, R6. At least one of the two rollers R5, R6 is a drive roller. The combination film 11 (in other words, the shrink film 12 and the non-shrink film 14) passes between the two rollers R5 and R6 and is sent to the downstream side of the two rollers R5 and R6.

  In the example shown in FIG. 8, the moving speed of the outer surface of the second pinch roller 46 disposed downstream of the welding device 45 is the same as the outer surface of the first pinch roller 44 disposed upstream of the welding device 45. It is preferable that the moving speed of Since the moving speed of the outer surface of the second pinch roller 46 is larger than the moving speed of the outer surface of the first pinch roller 44, the shrink film positioned between the first pinch roller 44 and the second pinch roller 46 Tension acts on the 12 and the non-shrink film 14. For this reason, wrinkles do not occur in the shrink film 12 and the non-shrink film 14.

  In the example shown in FIG. 8, the welding device 45 is disposed between the first pinch roller 44 and the second pinch roller 46. For this reason, the welding device 45 forms the welded portion 160 (see FIG. 9) on the shrink film 12 and the non-shrink film 14 in a state where tension is applied by the first pinch roller 44 and the second pinch roller 46. be able to. Therefore, the formation defect of the welding part 160 does not arise, and an air leak does not arise from independent air room AC (air cushion) of packaging object 2B after completion.

  As shown in FIG. 8, in the package manufacturing system 3B, the moving speed of the outer surface of the second pinch roller 46 is greater than the moving speed of the outer surface of the first pinch roller 44. A control device H that controls the rotational speed of the 2 pinch roller 46 and the first pinch roller 44 may be provided.

  In the example shown in FIG. 8, the welding device 45 includes a first welding device 45a and a second welding device 45b. As shown in FIG. 9, the first welding device 45 a forms a welding portion 160 a parallel to the transfer direction of the non-shrink film 14. On the other hand, the second welding device 45 b forms a welding portion 160 b perpendicular to the transfer direction of the non-shrink film 14.

  In the example shown in FIG. 9, the welding device 45 includes two welding portion forming rollers R7 that form the welding portion 160a along two straight lines parallel to the non-shrink film 14 transfer direction. Alternatively, as shown in FIG. 10, the welding device 45 may form three or more weld forming rollers R7 that form welds 160a along three or more straight lines parallel to the non-shrink film 14 transfer direction. May be provided.

  In the example shown in FIG. 9, the second welding device 45b has a welding portion forming roller R8 that forms the welding portion 160b. A welding convex portion 451 b extending along the width direction of the non-shrinking film 14 is disposed on the outer peripheral surface of the welding portion forming roller R8. In the example shown in FIG. 8, four welding projections 451 b are arranged on one welding part forming roller R 8, but the number of welding projections 451 b provided in the welding part forming roller R 8 is one or two. It may be three, three or five or more.

  In the example shown in FIG. 9, a first welding device 45 a forming a welding portion 160 a parallel to the transfer direction of the non-shrink film 14 and a second welding forming the welding portion 160 b perpendicular to the transfer direction of the non-shrink film 14. Although the device 45b is separate, the first welding device 45a and the second welding device 45b may be integrated. For example, an annular welding protrusion forming the welding portion 160a and a welding protrusion extending along the width direction of the non-shrink film 14 may be disposed in one welding portion forming roller. .

  As shown in FIGS. 9 and 10, the welding device 45 forms a welding portion 160 and a plurality of sections SC surrounded by the welding portion 160. Each of the plurality of sections SC is surrounded by the welded portion 160 as viewed in a direction perpendicular to the main surface of the non-shrink film 14 (in other words, the main surface of the combination film 11). Each of the plurality of compartments SC constitutes an independent air chamber AC surrounded by the shrink film 12, the non-shrink film 14, and the welded portion 160. In the case where each section SC is surrounded by the welded portion 160, when the air is introduced into the independent air chamber AC corresponding to each section SC, the independent air chamber AC effectively functions as an air cushion.

  In the example shown in FIG. 9, the entire shape of the welded portion 160 has a ladder shape when viewed in the direction perpendicular to the main surface of the non-shrink film 14 (in other words, the main surface of the combination film 11). Alternatively, as shown in FIG. 10, the overall shape of weld 160 is a lattice shape, as viewed in a direction perpendicular to the main surface of non-shrink film 14 (in other words, the main surface of combination film 11). May be included. In the second embodiment, the entire shape of the welded portion 160 is not limited to the ladder shape or the lattice shape. The entire shape of the welded portion 160 is a shape in which a plurality of closed sections SC are formed as viewed from a direction perpendicular to the main surface of the non-shrink film 14 (in other words, the main surface of the combination film 11) Is optional.

  In the example shown in FIG. 7, the first package forming device 5 is disposed downstream of the combination film forming device 4. Alternatively, the combination film forming apparatus 4 may be provided independently of the first package forming apparatus 5. In other words, the formation of the combination film 11 and the formation of the first package 1B may be performed at different sites. In this case, the combination film forming device 4 preferably has a film winding device for winding the combination film 11 formed by the welding device 45. The wound combination film 11 constitutes a third winding body.

(First package forming device 5)
The first package forming device 5 is disposed on the downstream side of the combination film forming device 4 or a third wound body to which the combination film 11 is fed.

  In the example illustrated in FIG. 11, the first package forming device 5 includes a film forming machine 52, an article supply conveyor 53 for supplying the articles M to the combination film 11, and a sealing device 55. The first package forming device 5 may include a guide device 51 with an angle adjustment function on the upstream side of the film forming machine 52. In addition, the first package forming device 5 may include an air removing device 58.

  The guide device 51 guides the combination film 11 supplied from the combination film forming device 4 or the third wound body. In the example illustrated in FIG. 11, the guide device 51 includes a guide roller 511, a guide roller support member 512, and a guide device base portion 513. The guide roller support member 512 is a member whose length can be adjusted, and by adjusting the length of the guide roller support member 512, the distance between the guide device base portion 513 and the guide roller 511 can be adjusted. In addition, the guide roller support member 512 can change the fixed angle with respect to the guide device base portion 513 with the first axis AX disposed in the guide device base portion 513 as a center. In other words, the extending direction of the guide roller support member 512 can be adjusted in angle with respect to the horizontal plane. The angular position of the guide roller 511 is adjusted around the first axis AX by adjusting the angle in the extending direction of the guide roller support member 512 with respect to the horizontal plane.

  In the example shown in FIG. 11, the angular position of the guide roller 511 can be adjusted around the first axis AX, and / or the distance between the guide device base 513 and the guide roller 511 can be adjusted. Thus, it is possible to adjust the transport direction of the combined film 11 from the guide roller 511 toward the film forming machine 52, in other words, the supply direction of the combined film 11 to the film forming machine 52. In addition, the guide roller can be adjusted by adjusting the angular position of the guide roller 511 around the first axis AX and / or by adjusting the distance between the guide device base 513 and the guide roller 511. It is possible to adjust the tension acting on the combination film 11 going from 511 to the film forming machine 52.

  As described above, the guide device 51 (guide roller 511) adjusts the supply direction of the combined film 11 to the film forming machine 52, and adjusts the tension acting on the combined film 11. For this reason, the guide device 51 (guide roller 511) can supply the combined film 11 to the film forming machine 52 in a state in which the combined film 11 has no wrinkles and the meandering of the combined film 11 is suppressed.

  In the example described in FIG. 11, the film forming machine 52 includes a former that forms the strip-shaped combined film 11 into a cylindrical shape. The cross-sectional shape perpendicular to the film transfer direction of the combined film 11 made cylindrical by the film forming machine 52 may be a rectangular shape as shown in the C-C cross section in FIG. Alternatively, the cross-sectional shape perpendicular to the film transfer direction of the tubular combined film 11 may be a circular shape.

  The film forming machine 52 is configured, for example, by an annular member with a notch. The cylindrical combination film 11 is disposed inside the annular member, and the two side edges 11 s of the combination film 11 are inserted through the notches of the annular member.

  The article supply conveyor 53 supplies the articles M toward the tubular combination film 11. The article M may be a food-containing container containing a food such as dry noodles, a container containing an object other than a food, or an article other than a container. The article M may be a rose article.

  It is preferable that a plurality of pressing pieces 53a for pressing the articles M be attached to the article supply conveyor 53 at regular intervals. When the plurality of pressing pieces 53a are attached to the article supply conveyor 53 at a constant interval, the plurality of articles M are supplied toward the cylindrical combination film 11 at a constant interval.

  In the example shown in FIG. 11, the article supply conveyor 53 is a conveyor that supplies the articles M along the horizontal direction.

  The sealing device 55 is a device for packaging (more specifically, sealing) the article M by the combination film 11 by welding a part of the combination film 11 and the other part of the combination film 11.

  In the example shown in FIG. 11, the sealing device 55 includes a vertical sealing device 551 and a horizontal sealing device 552.

  The vertical sealing device 551 forms the vertical sealing portion 18 by welding the two side edges 11s of the combined film 11 to each other. For example, the vertical sealing device 551 includes the side edge of the shrink film 12 constituting one side edge 11s and the side edge of the non-shrink film 14 and the side of the shrink film 12 constituting the other side edge 11s. It heats in the state which pinched | interposed the edge and the side edge part of the non-shrink film 14. As shown in FIG. In this case, the two-layer shrink film 12 and the two-layer non-shrink film 14 are integrated to form the vertical seal portion 18.

  The vertical sealing device 551 includes, for example, a pair of rollers R9 sandwiching the two side edges 11s of the combination film 11. At least one of the pair of rollers R9 is a heating roller. In this case, the two side edges 11s are welded to one another by the heating roller.

  In the example illustrated in FIG. 11, the first package forming device 5 includes an upstream pinch roller 54 which sandwiches and transports the two side edges 11 s of the combined film 11 on the upstream side of the vertical sealing device 551. The upstream pinch roller 54 includes two rollers R10. Preferably, at least one of the two rollers R10 is a drive roller.

  By disposing the upstream pinch roller 54 on the upstream side of the vertical sealing device 551, the two side edges 11s can be stably supplied to the vertical sealing device 551. Further, the upstream pinch roller 54 prevents the meandering of the two side edges 11s.

  In the example illustrated in FIG. 11, the first package forming device 5 includes, on the downstream side of the vertical seal device 551, a downstream pinch roller 56 that nips and transfers the vertical seal portion 18. The downstream pinch roller 56 includes two rollers R11. Preferably, at least one of the two rollers R11 is a drive roller.

  The moving speed of the outer surface of the downstream side pinch roller 56 is preferably larger than the moving speed of the outer surface of the upstream side pinch roller 54. The moving speed of the outer surface of the downstream side pinch roller 56 is greater than the moving speed of the outer surface of the upstream side pinch roller 54, so that the combined film positioned between the upstream side pinch roller 54 and the downstream side pinch roller 56 Tension acts on the side edge 11s of 11. For this reason, no wrinkles occur on the side edge 11s of the combination film 11. In addition, since no wrinkles occur in the side edge 11s of the combination film 11, the sealing failure does not occur in the vertical sealing portion 18 formed by the vertical sealing device 551.

  It is preferable that the outer surface of the downstream side pinch roller 56 be provided with a concavo-convex pattern. The vertical seal portion 18 in the heated state by being heated by the vertical seal device 551 is sandwiched by the downstream side pinch roller 56 having the concavo-convex pattern, whereby a concavo-convex pattern is formed in the vertical seal portion 18.

  In the example illustrated in FIG. 11, the first package forming device 5 includes a cylindrical film feeding device 57 between the vertical sealing device 551 and the horizontal sealing device 552.

  In the example shown in FIG. 11, the cylindrical film feeding device 57 includes the lower conveyor 571. The lower conveyor 571 supports the articles M via the combination film 11 (in other words, a cylindrical film). When the transfer surface of the lower conveyor 571 contacts the combination film 11 (in other words, the cylindrical film), the combination film 11 and the articles M on the combination film 11 are transferred to the downstream side.

  The cylindrical film feeding device 57 may include an upper conveyor 572. The upper conveyor 572 contacts the combination film 11 from above. The transport surface of the upper conveyor 572 contacts the combination film 11 (in other words, the tubular film), whereby the combination film 11 is transported to the downstream side.

  When the cylindrical film feeding device 57 includes the lower conveyor 571 and the upper conveyor 572, the transfer force acts on the lower side of the combined film 11 and the upper side of the combined film 11 in a balanced manner. Therefore, the cylindrical film can be supplied to the horizontal sealing device 552 in a state where the shape of the cylindrical film is maintained in an appropriate shape.

  On the downstream side of the vertical sealing device 551 (in the example shown in FIG. 11, the downstream side of the vertical sealing device 551 and the tubular film feeding device 57), a horizontal sealing device 552 is disposed.

  The transverse sealing device 552 forms the two transverse sealing portions 17 by welding the combination films 11 to each other. The transverse sealing device 552 heats with the upper part of the combination film 11 passing above the article M and the lower part of the combination film 11 passing below the article M sandwiched. In this case, the two-layer shrink film 12 and the two-layer non-shrink film 14 are integrated to form the transverse seal portion 17.

  The transverse sealing device 552 forms a forward transverse sealing portion 17a on the downstream side of the article M (in other words, on the front side of the article M), and on the upstream side of the article M (in other words, on the rear side of the article M) , Form the rear side seal part 17b. In the second embodiment, the transverse sealing device 552 transversely seals the combination film 11 that wraps the article M, thereby forming the first package 1B.

  In the example shown in FIG. 11, the lateral sealing device 552 includes a lateral seal portion forming roller R12 that forms the lateral seal portion 17. A welding convex portion 552c extending in parallel with the axial direction of the lateral seal portion forming roller R12 is disposed on the lateral seal portion forming roller R12. In the example shown in FIG. 11, one welding convex portion 552c is disposed on the lateral seal portion forming roller R12.

  In the example shown in FIG. 11, the transverse sealing device 552 includes a second transverse seal portion forming roller R13 disposed to face the transverse seal portion forming roller R12. A welding convex portion 552d extending in parallel with the axial direction of the second horizontal seal portion forming roller R13 is disposed on the second horizontal seal portion forming roller R13. In the example shown in FIG. 11, the upper part of the combination film 11 and the lower part of the combination film 11 are pressed and heated by the welding convex part 552c and the welding convex part 552d. Thus, the upper portion of the combination film 11 and the lower portion of the combination film 11 are welded to form the transverse seal portion 17.

  In the example shown in FIG. 11, the first package forming device 5 includes an air removing device 58. The air removal device 58 discharges the air in the shrink film 12 out of the shrink film 12 by pressing the non-shrink film 14.

  The shrink film 12 is formed with a plurality of through holes 12 h. However, in the second embodiment, since the shrink film 12 is covered by the non-shrink film 14, the through holes 12 h of the shrink film 12 allow the air in the shrink film 12 to be outside when the shrink film 12 is thermally shrunk. It can not be used as an air exhaust hole. Therefore, in the second embodiment, it is preferable to dispose an air venting device 58 for discharging a part of air in the shrink film 12 to the outside.

  In the example shown in FIG. 11, the air removing device 58 is a brushed roller R14 having a brush disposed on the outer peripheral surface. The air removing device 58 (more specifically, the brushed roller R14) is disposed, for example, on the downstream side of the transverse sealing device 552.

  In the example shown in FIG. 11, the air removing device 58 (more specifically, the brushed roller R14) is pressing the article M through the non-shrink film 14, the upstream side of the article M The combination film 11 is transversely sealed. As a result, the article M is packaged (more specifically, sealed) by the combination film 11 in a state where at least a part of the air in the shrink film 12 is exhausted by the air removing device 58.

(Second package forming device 6)
The second package forming device 6 is disposed downstream of the first package forming device 5. More specifically, the second package forming device 6 is disposed downstream of the sealing device 55 (or the air removal device 58).

  In the example described in FIG. 12, the second package forming device 6 includes a heat shrinking device 61. The second package forming device 6 may include a package transfer conveyor 62 that supplies the first package 1B to the heat shrink device 61 and discharges the second package (2B) from the heat shrink device 61.

  The heat contraction device 61 includes, for example, a shrink tunnel. The inside of the heat contraction device 61 (more specifically, the shrink tunnel) is maintained in the heating atmosphere. In the example shown in FIG. 12, the transfer surface of the package transfer conveyor 62 is configured to pass through the inside of the heat shrink device 61 (more specifically, the shrink tunnel).

  The heat-shrink device 61 forms the first package 1B to the second package (2B) by heating the first package 1B. More specifically, the heat shrink device 61 thermally shrinks the shrink film 12 of the combination film 11 to form the first package 1 B to the second package (2 B).

  When the shrink film 12 is thermally shrunk, the remaining air in the shrink film 12 is an independent air chamber AC surrounded by the shrink film 12, the non-shrink film 14 and the welded portion 160 through the through holes 12h of the shrink film 12. Move in Thus, air is introduced into the independent air chamber AC, and the independent air chamber AC functions as an air cushion.

  The second embodiment exhibits the same function as the first embodiment. In the second embodiment, the second package forming device 6 functions as a device for moving the air in the shrink film 12 to the independent air chamber AC. In this case, the independent air chamber AC functions as a buffer space for receiving the air in the shrink film 12. Since the air in the shrink film 12 is received in the independent air chamber AC (buffer space), the longitudinal length of the second package (2B) can be made compact, and is received in the independent air chamber AC. The supplied air functions as air for air cushions. In other words, in the second embodiment, by moving the air in the shrink film 12 to the independent air chamber AC, two effects having different properties (the effect of reducing the size of the second package (2B), And, the effect of forming the air cushion is simultaneously exhibited.

  As illustrated in FIG. 9 or FIG. 10, the package manufacturing system 3B in the second embodiment has a joint (more specifically, welding) so as to surround the entire circumference of the section SC which becomes the independent air chamber AC. In the case of including the joint portion forming device (more specifically, the welding device 45) which forms the portion 160), in the manufactured second package (2B), the inside of the independent air chamber AC is out of the independent air chamber AC. There is no air leakage to the air, or the air leakage is suppressed. Thus, the cushioning property of the independent air chamber AC is improved.

  Further, in the case where the pinch rollers (34, 36) having different rotational peripheral speeds are arranged on the upstream side and the downstream side of the welding device 45 in the package manufacturing system 3B in the second embodiment, the welding portion 160 is formed. At times, wrinkles do not occur in the shrink film 12 and the non-shrink film 14. Therefore, the formation defect of the welding part 160 does not generate | occur | produce and air is from the inside of independent air chamber AC to the outside of independent air chamber AC via the formation defect part of welding part 160 in the manufactured 2nd package (2B). There is no escape.

  In addition, when the package manufacturing system 3B in the second embodiment includes the air venting device 58, a large amount of air does not remain in the shrink film 12, and a large amount of air remains, thereby causing the shrink film There is no possibility that 12 will shrink. When the article M is completely sealed by the non-shrink film 14, the decrease in air volume in the shrink film 12 accompanying the heat contraction corresponds to the increase in air volume in the entire independent air chamber AC. .

  In the case where the package manufacturing system 3B in the second embodiment includes the vertical sealing device 551 and the horizontal sealing device 552, a pillow package with an air cushion can be manufactured continuously.

(Packaging body manufacturing method)
An example of a method of manufacturing a package according to the second embodiment will be described with reference to FIGS. 7 to 14.

  The first step ST1 is a combination film forming process. The first step ST1 includes, for example, at least one of the following steps ST1-1 to ST1-5.

  In step ST1-1, the shrink film 12 is drawn out from the first wound body 41, and the non-shrink film 14 is drawn out from the second wound body 42.

  In step ST1-2, a plurality of through holes 12h are formed in the shrink film 12 drawn out from the first wound body 41. Step ST1-2 is performed, for example, using the above-described punch 43.

  In step ST1-3, the non-shrink film 14 fed out from the second wound body 42 and the shrink film 12 in which the plurality of through holes 12h are formed are superimposed. Steps ST1-3 are executed using, for example, the above-described overlapping roller R2.

  In step ST <b> 1-4, tension is applied to the shrink film 12 and the non-shrink film 14 on the downstream side of the overlapping roller R <b> 2. Steps ST <b> 1-4 are executed, for example, using the first pinch roller 44 and the second pinch roller 46 described above.

  In step ST1-5, the shrink film 12 and the non-shrink film 14 are welded, and the combination film 11 provided with the welded portion 160 is formed. Steps ST1-5 are performed, for example, using the above-described welding device 45.

  The second step ST2 is a first package forming step. The second step ST2 includes, for example, at least one of the following steps ST2-1 to ST2-8.

  In step ST2-1, tension is applied to the combination film 11. Step ST2-1 is performed, for example, using the above-described guide device 51.

  In step ST2-2, the combination film 11 is formed into a tubular shape. Step ST2-2 is performed, for example, using the above-mentioned film forming machine 52.

  In step ST2-3, the article M is supplied into the tubular combination film 11. Step ST2-3 is performed, for example, using the above-mentioned article supply conveyor 53.

  In step ST2-4, the vertical seal portion 18 is formed on the cylindrical combination film 11. Step ST2-4 is performed, for example, using the above-mentioned vertical seal device 551. In step ST2-4, the supply of the combined film 11 to the vertical sealing device 551 is performed, for example, using the upstream pinch roller 54 and / or the downstream pinch roller 56 described above.

  In step ST2-5, the combination film 11 and the article M in which the vertical seal portion 18 is formed are transported toward the horizontal seal device 552. Step ST2-5 is performed, for example, using the above-mentioned cylindrical film feeding device 57.

  In step ST2-6, on the downstream side of the article M, the front side horizontal seal portion 17a is formed. Step ST2-6 is performed, for example, using the above-mentioned horizontal seal device 552.

  In step ST2-7, the air in the shrink film 12 is discharged out of the combination film 11. Step ST2-7 is performed, for example, using the above-described air bleeding device 58.

  In step ST2-8, the rear side horizontal seal portion 17b is formed on the upstream side of the article M. Step ST2-8 is performed, for example, using the above-mentioned horizontal seal device 552. By the execution of step ST2-8, the first package 1B is formed.

  The third step ST3 is a second package forming step. The third step ST3 includes, for example, at least one of the following steps ST3-1 and ST3-2.

  In step ST3-1, the first package 1B is transferred to the heat shrink device 61. Step ST3-1 is performed, for example, using the above-mentioned package transfer conveyor 62.

  In step ST3-2, the shrink film 12 of the first package 1B is thermally shrunk. Step ST3-2 is performed, for example, using the above-mentioned heat contraction device 61. By the execution of step ST3-2, the second package (2B) is formed.

  FIG. 14 schematically shows the movement of air accompanying the execution of step ST3-2. In step ST3-2, the air in the shrink film 12 is expanded by heating the first package 1B. As a result, part of the air in the shrink film 12 moves through the through holes 12 h of the shrink film 12 to the section between the shrink film 12 and the non-shrink film 14 (see FIG. 14 (b)). ).

  Further, in step ST3-2, the shrink film 12 is shrunk by heating the shrink film 12. As the shrink film 12 shrinks, the internal volume of the shrink film 12 decreases. For this reason, the air in the first space SP1 between the article M and the shrink film 12 passes through the through holes 12 h of the shrink film 12 to form a section SC between the shrink film 12 and the non-shrink film 14 (in other words, For example, to the independent air chamber AC) (see FIG. 14 (c)). Since the section SC is a closed space except for the through holes 12h, the air moved to the section SC remains in the section SC (in other words, the independent air chamber AC). In order for the air in the compartment SC to return into the shrink film 12 through the through holes 12 h, it is necessary to expand the shrink film 12 on which the tension is applied. Therefore, it is substantially difficult for the air in the section SC to return into the shrink film 12 through the through holes 12 h. In other words, in the example shown in FIG. 14, the movement of air from the inside of the independent air chamber AC to the outside of the independent air chamber AC is restricted, so the independent air chamber AC effectively functions as an air cushion.

  The present invention is not limited to the above embodiments, and it is apparent that each embodiment can be appropriately modified or changed within the scope of the technical idea of the present invention. In addition, various techniques used in each embodiment can be applied to other embodiments as long as no technical contradiction arises. Furthermore, any additional configuration in each embodiment can be omitted as appropriate.

1, 1A, 1B: first package 2, 2A, 2B: package 3, 3A, 3B: package manufacturing system 4: combination film forming apparatus 5: first package forming apparatus 6: second package forming apparatus 11: combination film 11s: side edge 12: shrink film 12a: first major surface 12b: second major surface 12h: through hole 14: non-shrink film 14a: first major surface 16: joint portion 17, 17a, 17b: Horizontal seal portion 18: vertical seal portion 41: first wound body 42: second wound body 43: piercing machine 44: first pinch roller 45: welding device 45a: first welding device 45b: second welding device 46: Second pinch roller 51: guide device 52: film forming machine 53: article supply conveyor 53a: pressing piece 54: upstream pinch roller 55: seal device 56: downstream pinch roller 57 A cylindrical film feeder 58: an air bleeder 61: a thermal contraction device 62: a package transfer conveyor 160, 160a, 160b: a welding portion 451b: a welding projection 511: a guide roller 512: a guide roller support member 513: a guide device Base 551: vertical sealing device 552: horizontal sealing device 552c, 552d: welding convex portion 571: lower conveyor 572: upper conveyor AC: independent air chamber AX: first axis H: control device M: article R1: perforation roller R2: Overlapping rollers R3 to R6: Rollers R7, R8: Weld forming roller R9 to R11: Roller R12: Lateral seal forming roller R13: Second lateral seal forming roller R14: Brushed roller SC: Section SP1: 1st space

Claims (5)

A combination film forming apparatus for forming a combination film in which a shrink film and a non-shrink film are superimposed;
A first package forming device for forming a first package by wrapping an article with the combination film;
A second package forming device for forming a second package from the first package by thermally shrinking the shrink film of the combination film;
The combination film forming apparatus forms a bonding portion that bonds the shrink film and the non-shrink film.
The first package forming apparatus forms the first package such that the non-shrink film is disposed outside the shrink film.
The second package forming device forms an independent air chamber filled with air by introducing air into a section surrounded by the shrink film, the non-shrink film, and the joining portion ,
The first package forming device includes an air bleeding device.
The package manufacturing system according to claim 1, wherein the air removing device discharges the air in the shrink film to the outside of the shrink film by pressing the non-shrink film . The first package has a first space between the shrink film and the article,
The package manufacturing system according to claim 1, wherein the second package forming device moves air in the first space to the independent air chamber. The package manufacturing system according to claim 1 or 2, wherein the combination film forming apparatus forms the coupling portion so as to surround the entire circumference of the section which becomes the independent air chamber when viewed from the direction perpendicular to the combination film. . The combination film forming apparatus is
The first pinch roller,
A welding device disposed downstream of the first pinch roller;
And a second pinch roller disposed downstream of the welding device;
The package manufacturing system according to any one of claims 1 to 3 , wherein the moving speed of the outer surface of the second pinch roller is larger than the moving speed of the outer surface of the first pinch roller. A combination film forming step of forming a combination film in which the shrink film and the non-shrink film are overlapped;
A first package forming step of forming a first package by wrapping an article with the combination film;
A second package forming step of forming a second package from the first package by thermally shrinking the shrink film of the combination films;
The combination film forming step has a joint portion forming step of forming a joint portion which bonds the shrink film and the non-shrink film,
In the first package forming step, the shrink film is disposed outside the article, and the non-shrink film forms the first package disposed outside the shrink film.
In the second package forming step, an independent air chamber functioning as an air cushion is formed by introducing air into a section surrounded by the shrink film, the non-shrink film, and the joining portion ,
The first package forming step includes discharging the air in the shrink film to the outside of the shrink film by an air bleeding device pressing the non-shrink film .

Images