JP2003165502A - Filling and packaging device and method, and packaging body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a filling and packaging device and a filling and packaging method, and a packaging body capable of stably obtaining a folded part for forming an envelope-like overlapping part. <P>SOLUTION: A temporary sealing device 10 which is disposed between folding devices 2A and 9 and a forming plate 12, and seals surface-contact films of a folding part F2 parallel to a film side edge by a temporary seal 11 of the peeling strength after the sealing smaller than that of a longitudinal seal at a part of the surface-contact area is provided. A longitudinal sealing device 13 is disposed between a folding line F2A of the folded part and the temporary seal 11 at the position to weld and seal a packaging surface film and the surface-contact film of the folded part. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filling and packaging apparatus and method and a package obtained from the apparatus and method.

[0002]

2. Description of the Related Art Conventionally, in order to make it easy to open a film package, it has been known that both side edges of the film are sealed by so-called sticking together to form an ear (also referred to as a pick). There is. For example, the package is disclosed in JP-A-9-124071. This package is shown in FIG.
As shown in FIG. 5A, after the strip-shaped film having the folded-back portion 51 is formed with the vertical seal 52 to form the tubular body, the ears (53, 54) are removed as shown in FIG. 5 (B). When the contents 55 are filled into the package, the two ears 53, 54 come into contact with the surface of the package. The folded-back portion 51 forms one (inner) ear portion 53.

When the package is opened, the two ears are raised and both ears 53, 54 are pinched to break the seal 52 and open the package. At that time, both ears are often different in width so that they can be picked separately.

The above-mentioned ears are formed by folding back one side edge of the strip-shaped film during running before the film is formed into a cylindrical body. The method is, for example, the above-mentioned JP-A-9-124071 or JP-A-3-25680.
7 are disclosed. In this known method, the film is folded by causing a guide to come into contact with the side edge of the running film with a predetermined width at an angle to the film surface.
The guides are provided at a plurality of positions in the film traveling direction, and the angles are sequentially increased to form the film folding portion without difficulty.

Thus, the strip-shaped film having the folded portion is formed into a tubular shape by the forming plate, and the overlapping portion of the side edge of the tubular film when formed into a tubular shape is vertically sealed, and the tubular film body is filled with the contents. After that, it is laterally sealed and cut to obtain an independent package as a product. When the contents are taken out, the two ears of the package are raised, and both ears are picked and opened to open the package.

[0006]

The folded portion of the film for forming the above-mentioned ear portion is formed by the folding means at the upstream position in the running direction of the film with respect to the forming plate which forms the film in a tubular shape. Therefore, in the folded portion, the distance from the folding means to the forming plate must be kept constant by the folded portion itself in the folded width and folded state.

However, during the traveling of the film, the width of the folded portion and the position where the film is guided to the forming plate may change due to slight fluctuations in the speed of the film or unexpected external force applied to the film. When the change occurs even a little, the running film tends to increase the amount of change during the running.

The above-mentioned change in the folded portion causes the width of the ear portion of the package as a product to deviate from the specified value, and causes wrinkles and the like on the film, resulting in a defective product. Therefore, in order to prevent this, it is necessary to constantly monitor the state of the folded portion and stop the apparatus when a change occurs and readjust. This significantly reduces the availability of the device.

In view of such circumstances, it is an object of the present invention to provide a filling and packaging apparatus and method capable of always performing a stable operation with a constant folded portion, and a package obtained from them.

[0010]

SUMMARY OF THE INVENTION A filling and packaging apparatus according to the present invention comprises a plurality of guide rollers for sequentially guiding a strip-shaped film drawn from an original fabric, and one side of the strip-shaped film between arbitrary adjacent guide rollers. A folding device that forms a folded portion of a predetermined width at the edge portion, a guide body that guides the folded portion of the folded film to travel, and a forming plate that forms a belt-shaped film into a tubular film having a side edge overlapping portion. A vertical sealing device that vertically seals the overlapping portion in the traveling direction below the forming plate; and a nozzle device that enters the forming and fills the tubular film after the vertical sealing with contents. And a horizontal sealing device that forms a horizontal seal on the tubular film in the absence portion of the contents formed at predetermined intervals in the traveling direction.

In such a filling and packaging apparatus, according to the present invention, the contact surface films of the folded portion are disposed between the folding device and the forming plate, and the contact surface films are sealed at a part of the contact surface area after the vertical sealing. Equipped with a temporary seal device that seals in parallel with the film side edge with a temporary seal with a small peeling strength, the vertical seal device has a contact surface between the wrapping surface film and the folded part between the fold line of the folded part and the temporary seal. It is characterized in that it is arranged at a position where it is welded and sealed to the film.

According to the apparatus of the present invention, the strip-shaped film pulled out from the original fabric and the plurality of guide rollers are sequentially guided to travel, and the folded-back portion is formed with a predetermined width at one side edge of the strip-shaped film which is running. Next, the band-shaped film is formed into a tubular film having a superposed portion with a forming plate, vertical sealing is performed in the superposed portion, and the contents are filled in the tubular film after the vertical sealing, After that, absent parts of the contents are formed at predetermined intervals in the film traveling direction,
The tubular film is laterally sealed here. In the present invention, the contact surface films of the folded-back portions of the film are in a part of the contact surface area, and at a position before the forming plate, a temporary seal having a smaller peel strength after sealing than the vertical seal is parallel to the side edge of the film. To form.

In the package made according to the present invention as described above, the envelope-shaped overlapped portion is brought down to the film surface of the package body and brought into contact therewith to form the inner and outer ears, and the inner ear is formed more than the vertical seal. The temporary seal having a small peeling strength after sealing seals only the film surface of the package, and the vertical seal seems to be sealed between the position of the temporary seal and the fold line of the inner ear portion. The provision of the temporary seal improves the sealing property, and can be easily opened at the time of opening. At that time, if the outer ear is wider than the inner ear,
It becomes easier to open.

In the present invention, the folding device is a folding guide roller that projects the film by the folding width from the end in the axial direction and guides the film to travel. The folding roller is located downstream of the guide roller in the film traveling direction. And a guide body that guides the folded portion of the film to travel, the guide body having a slit for traveling guide of the folded portion,
The groove bottom of the slit may be located at substantially the same position as the end of the folding guide roller in the width direction of the film. At this time, the folding device has, in addition to the folding guide roller and the guide body according to claim 2, a rotatable auxiliary roller for bringing the film overhanging portion into contact with the end face of the folding guide roller. You can also do it.

[0015]

1 to 4 of the accompanying drawings.
Based on this, an embodiment of the present invention will be described.

In FIG. 1, a plurality of horizontal guide rollers 1 to 7 which guide the strip-shaped film F drawn from a material (not shown) are arranged in parallel with each other. The direction in which the material is fed is the upstream side, and the direction of the forming plate is the downstream side. The guide rollers 1 to 7 change the traveling direction while appropriately applying tension to the belt-shaped film F. Figure 1
In the above, although each of the plurality of guide rollers 1 to 7 is arranged horizontally, it may be inclined to the horizontal plane or parallel to each other in the longitudinal direction, and the number thereof is not limited.

In the present embodiment, the second guide roller 2 from the upstream side in the traveling direction of the film F has a larger diameter than the other guide rollers 1, 3 to 7, and the one end face 2A is the other guide roller. It is located so as to be recessed in the axial direction by a predetermined distance from the one end surfaces 1A and 3A to 7A.

In this embodiment, the second guide roller functions as the folding guide roller 2, and one side edge thereof has one end surface 1A of the first guide roller 1 and one end surface 2A of the folding guide roller 2. The strip-shaped film F guided so as to be positioned between the first end surface 2A and the first end surface 2A can be folded by the width 8.

A guide body 9 is provided between the folding guide roller 2 and the next guide roller 3 located on the downstream side in the film running direction A. The guide body 9 is formed with a slit 9A parallel to the film surface, and the bottom of the slit 9A is substantially at the same position as the one end surface 2A of the folding guide roller 2 in the axial direction. Therefore,
In the slit 9A, the strip-shaped film F is folded back to the back side with a width of 8, and the strip-shaped film F is guided to travel while keeping the folded portion F2 constant. Thus, the end surface 2A of the folding guide roller 2 and the guide body 9 are
And the folding device is formed.

A temporary sealing device 10 is provided in contact with the guide roller 4 located downstream of the guide roller 3. The temporary sealing device 10 is located within the width 8 of the folded portion F2 of the belt-shaped film F,
Temporary sealing 11 by welding is performed at the folded portion F2. The temporary seal 11 has a smaller peel strength after sealing than a vertical seal described later. The guide body 9 and the temporary sealing device 10 are separated from each other in FIG. 1, but the temporary sealing device 10 may be provided directly adjacent to the guide body 9. Further, the roll 3 may be provided between the guide body 9 and the temporary sealing device 10 to further enhance the traveling guide of the belt-shaped film F guided to the temporary sealing device 10.

A known forming plate 12 is provided on the downstream side of the last guide roller 7. The forming plate 12 is a cylindrical plate that is superposed with a gap at one position in the circumferential direction and has a shape in which the upper end is obliquely cut, and along the circumferential surface while the strip-shaped film F from the guide roller 7 is running. It is wound to form a tubular film F4 having a superposed portion F3. Forming plate 12
A vertical sealing device 13 is disposed immediately below the position.
The vertical seal device 13 presses and welds the overlapped portion F3 of the traveling tubular film F4 from the inside and outside of the tubular film F4 to form a vertical seal 15, thereby forming a complete tubular body. The vertical sealing device 13 itself is publicly known, and its type is not limited. For example, when ultrasonic welding is used, an ultrasonic horn is arranged outside the cylindrical film F and an anvil is arranged inside. The vertical sealing device 13 is a tubular film F.
It is located so as to be located between the temporary seal 11 and the folded edge F2A of the folded portion F2 in the circumferential direction of 4.

Regarding the packaging material used for the package P of FIG. 3 which will be described later, this packaging material has a thickness of 20 μm to 500 μm.
A stretched or unstretched film or sheet having a thickness of μm can be preferably used. The film or sheet is made of a vinylidene chloride copolymer having an oxygen gas barrier property, which is a chlorine resin, or an olefin resin or polyamide, which is a non-chlorine resin, and these are used in a single layer or a laminate.

A film or sheet made of a chlorine-based resin which is susceptible to high frequency dielectric heating can be used as a single layer.

The olefin resin is preferably polyethylene, polypropylene, an ethylene / alkyl (meth) acrylate copolymer, a simple substance of a 4-methylpentene polymer, or a mixture thereof, more preferably an ethylene / methyl acrylate copolymer. A mixture with polypropylene or polypropylene.

A nozzle 14 is inserted from above into the forming plate 12 so that the tubular film F4 provided with the vertical seal 15 is filled with the contents.

Hereinafter, referring to FIG. 1 with reference to FIG. 2,
The procedure of filling and packaging in this embodiment will be described.

The strip-shaped film F guided by the guide roller 1 (see FIG. 2A) is extended by the width of 8 from the end face 2A of the next folding guide roller 2 (see FIG. 2).
(See (B)). This overhanging portion is folded back to the back side (lower side) when the film F is set before traveling, and the folded portion F2
The slits 9A are housed in the slit 9A of the guide body 9 by the operator so that the folded portion F maintains the folded state by the slits 9A even after the traveling of the film F is started (FIG. 2 (C)). reference).

A temporary seal 11 is formed by the temporary seal device 10 at the position of the guide roller 4 within the width 8 of the folded portion F (see FIG. 2D). The temporary seal 11 may be a continuous line along the side edge of the film or a discontinuous line. The width of the continuous line or discontinuous line is preferably linear or strip-shaped.

Thus, the strip-shaped film F is brought to the forming plate 12 with the width of the folded portion F2 always constant because of the temporary seal 11 and becomes the tubular film F4 having the overlapping portion F3 ( See FIG. 2 (E).

After that, the tubular film F4 is
The vertical seal device 13 continuously forms the vertical seal 15 in the film running direction. As a result, the tubular film F
4 is a folded portion F2 and an overlapping portion F3 that form an envelope-shaped overlapping portion.

The tubular film F4 after such vertical sealing
Is filled with the content from the nozzle 14, then deformed into a flat shape by a means (not shown), and is squeezed to form absent portions of the content at predetermined intervals in the traveling direction,
Horizontally sealed there, and cut at the horizontal seal part,
Individual packages are obtained as products.

The package P thus obtained is shown in FIG.
It has an outer shape as shown in (A), and its cross section is shown in FIG.
It is like (B). In this cross-sectional shape, the overlapping portion F3 of the film is tilted and overlapped on the folded-back portion F2 forming the inner ear portion, and the width thereof is larger than that of the folded-back portion F to cover the outer side to form the outer ear portion. . Regarding the seal, the temporary seal 11 is provided only between the folded portion F2 and the inner film of the package P, whereas the vertical seal 15 is provided.
Is applied to three sheets of the overlapping portion F3, the folded portion F2 and the inner film. As described above, the temporary seal 11 has a smaller peel strength than the vertical seal 15, and is preferably an easy-open seal, while the vertical seal is a gas-tight seal.

When the contents are opened, in FIG. 3 (B), the overlapped portion F3, which is the outer ear portion, is pinched with a finger to stand up. Then, in the folded-back portion F2, the temporary seal 11 is easily separated from the inner surface film and stands up together with the overlapped portion F3. Then, by grasping the overlapped portion F3 which is the outer ear portion with one hand and the folded portion F2 which is the inner ear portion with the other hand and opening them in the opposite direction, the vertical seal 15 is also peeled off and the contents can be taken out. Becomes

The present invention is not limited to the illustrated embodiment, but can be variously modified. For example, as shown in FIG. 4, the auxiliary roller 16 may be brought into contact with the end surface 2A of the folding roller 2.
By doing so, the protruding portion of the width F of the film F is sandwiched between the auxiliary roller 16 and the end surface 2A, and with a slight resistance, it is possible to surely bend for folding back. .

In the present invention, various heating means for the seal itself can be applied, for example, high frequency dielectric heating, ultrasonic heating,
Resistance heating, hot air heating (hot jet heating), laser heating, etc. are possible. In that case, in the present invention, the peel strength of the temporary seal after sealing is required to be smaller than that of the vertical seal.

(A) Regarding the seal when a film or sheet made of a chlorine-based resin is used as the packaging material, the peel strength after the seal is roughly in the order depending on the sealing means, and high frequency dielectric heating> ultrasonic heating > Resistance heating. Therefore, it is preferable that the vertical sealing is performed by high frequency dielectric heating and the temporary sealing is performed by resistance heating. As another aspect, the welding means of the vertical seal is performed by ultrasonic heating and the temporary sealing is performed by resistance heating. Is preferred.

(B) Sealing when a film or sheet made of a chlorine-free resin is used as a packaging material,
The peeling strength after the sealing has approximately the order according to the sealing means, and is flame heating (hot jet heating)> ultrasonic heating> resistance heating. Therefore, as a mode, it is preferable to perform vertical sealing by hot air heating (hot jet heating) and temporary sealing by resistance heating. As another mode, the vertical sealing is performed by ultrasonic heating. It is preferable to perform temporary sealing by resistance heating. It is well known that the peeling strength of these seals after sealing depends on the heating time, heating temperature or heating pressure.

Further, when the strip-shaped film F is guided to the forming plate 14, the adhesion of the surface of the roller 7 may be increased to increase the stability thereof.
Therefore, a slip prevention tape may be wound around the surface of the roller 7.

[0039]

As described above, according to the present invention, when the folded portion of the film, which is one of the ears of the package, is formed, the folded portion is temporarily sealed. Even if it comes to, the folding width does not change and becomes constant, the filling and packaging machine is not stopped for the readjustment of the width of the folding part, the operation rate of the equipment is improved, and the occurrence of defective products is prevented. it can. In addition, in the packaging, the temporary seal at the folded portion functions as an auxiliary seal against the vertical seal to prevent contamination in the vicinity of the vertical seal, and when opening the temporary seal against the vertical seal. By making the peel strength small, the package can be easily opened.

[Brief description of drawings]

FIG. 1 is a schematic configuration perspective view of an apparatus according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the film shown in FIG. 1 from the temporary sealing to the vertical sealing of the film, where (A) is the film and (B) is the overhanging part. , (C) when forming the folded portion, (D)
Shows a temporary seal, (E) shows a tubular film formed, and (F) shows a vertical seal.

3A and 3B show a package obtained by the apparatus shown in FIG. 1, in which FIG. 3A is a perspective view showing an outer shape, and FIG.

FIG. 4 is a diagram showing another embodiment.

5A and 5B show a conventional packaging procedure, in which FIG. 5A shows a cross section of a belt-shaped film having a folded portion, FIG. 5B shows a cylindrical film, and FIG.

[Explanation of symbols]

1-7 Guide roller 2 Folding guide roller 2A folding device (end face) 8 Overhang part (width) 9 Overhanging part (guide) 10 Temporary sealing device 11 Temporary stickers 12 Forming plate 13 Vertical sealing device 14 Nozzle device 15 Vertical seal 16 Auxiliary roller F band-shaped film F2 folding section F2A folded line F3 Overlap part F4 tubular film

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 3E050 AA03 AA06 AA08 AA10 AB02                       CA09 CB01 CC04 CC10 DC02                       DC08 DD07 DH10 FA01 FB01                       FB07                 3E064 AA08 BA26 BA30 BA36 BA38                       BB03 BC08 BC18 EA04 HN05                 3E067 AA11 BA12A BB14A BB15A                       BB16A CA24 EA06 EA11                       FA01 FB02 FC01

Claims (6)

[Claims] 1. A plurality of guide rollers for sequentially guiding and guiding a strip-shaped film drawn out from a raw fabric, and a folding device for forming a folding portion having a predetermined width on one side edge portion of the strip-shaped film between arbitrary adjacent guide rollers. A forming plate for forming a strip-shaped film into a tubular film having overlapping portions at side edges, a vertical sealing device for vertically sealing the overlapping portions below the forming plate in the traveling direction, and And a horizontal sealing device for forming a horizontal seal on the tubular film at absent portions of the content formed at predetermined intervals in the traveling direction by entering a nozzle and filling the inside of the tubular film after vertical sealing. In the filling and packaging apparatus having, the wrapping device and the forming plate are arranged, and the contact surface films of the fold-back portion are partially separated from each other by a vertical seal. Is equipped with a temporary seal device that seals in parallel with the film side edge with a temporary seal with a small peeling strength after sealing, and the vertical seal part of the vertical seal device is the packaging surface between the fold line of the folded part and the temporary seal. A filling and packaging apparatus, which is arranged at a position where a film and a contact surface film of a folded portion are welded and sealed. 2. The folding device comprises a folding guide roller for extending and guiding the film by a folding width from an axial end portion of a guide roller upstream of the folding device, and a traveling direction of the guide roller for the film. A guide body that guides the folded portion of the folded film at a downstream position for traveling, and the guide body has a slit for guiding the folded portion, and the groove bottom of the slit is the width of the film. The filling and packaging apparatus according to claim 1, wherein the filling and packaging apparatus is located at substantially the same position as the end portion of the folding guide roller in the direction. 3. The folding device has, in addition to the folding guide roller and the guide body according to claim 2, a rotatable auxiliary roller for bringing the film overhanging portion into contact with the end face of the folding guide roller. The filling and packaging apparatus according to claim 1. 4. A strip-shaped film pulled out from an original fabric is sequentially guided by a plurality of guide rollers to form a folded-back portion having a predetermined width at one side edge of the strip-shaped film during traveling, and the strip-shaped film is formed. It is formed into a tubular film with a superposed part by a forming plate, the superposed part is vertically sealed, and the contents are filled in the tubular film after the vertical sealing, and then at predetermined intervals in the film running direction. In a filling and packaging method in which a non-existing portion of the contents is formed for each, and the tubular film is transversely sealed here, the contact surface films of the folded portions of the film are formed in a part of the contact surface area with the forming plate. A filling and packaging method characterized in that a temporary seal having a peeling strength after sealing which is smaller than that of a vertical seal is formed in parallel with a side edge of a film at a front position. 5. A package obtained by forming a chiral overlapping portion on both side edges of a film, longitudinally sealing at the chiral overlapping portion, and laterally sealed and cut at predetermined intervals after filling the contents, The overlapping part of the palm is folded down and brought into contact with the film surface of the package to form inner and outer ears, and the inner ear is sealed only with the film surface of the package by a temporary seal that has a smaller peel strength than the vertical seal. The vertical seal is sealed between the position of the temporary seal and the folding line of the inner ear portion. 6. The package according to claim 5, wherein the outer ear portion is wider than the inner ear portion.