JP3930305B2 - Filling and packaging apparatus and method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a filling and packaging apparatus and method.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in order to make it easier to open a film package, there is known a method in which both side edges of a film are sealed by so-called joint-pasting to form an ear (also referred to as a knob). For example, Japanese Patent Laid-Open No. 9-124071 discloses a package. As shown in FIG. 5 (A) of the accompanying drawings, this package body is formed as shown in FIG. 5 (B) after the belt-like film on which the folded portion 51 is formed is formed with the vertical seal 52 for forming the cylindrical body. Thus, when the ears (53, 54) are filled with the contents 55 to form a package, the two ears 53, 54 come into contact with the surface of the package. The folded portion 51 forms one (inner) ear portion 53.
[0003]
At the time of opening the package, two ears are raised, both ears 53 and 54 are picked, and the seal 52 is broken and opened. At that time, the widths of both ears are often different so that they can be easily picked separately.
[0004]
The ear portion is formed by folding one side edge during running of the belt-like film before the film is formed into a cylindrical body. This method is disclosed, for example, in the above Japanese Patent Laid-Open No. 9-124071 or Japanese Patent Laid-Open No. 3-256807. In this known method, the guide is brought into contact with the side edge of the running film with a predetermined width at an angle with respect to the film surface, and the film is folded back. The guides are provided at a plurality of positions in the film running direction, and the above-mentioned angles are gradually increased to form the film turn-up portion without difficulty.
[0005]
Thus, the belt-like film having the folded portion is formed into a cylindrical shape by the forming plate, the overlapping portion at the side edge when formed into the cylindrical shape is vertically sealed, and the contents are filled into the cylindrical film body, and thereafter , Transversely sealed and cut to obtain an independent package as a product. When taking out the contents, the above two ear portions of the package are raised, and both ear portions are picked and opened to open.
[0006]
[Problems to be solved by the invention]
The folded portion of the film for forming the 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 that forms the film in a cylindrical shape. Therefore, the distance between the folding means and the forming plate must be kept constant by the folding section itself by its folding width and folding state.
[0007]
However, during the film running, the width of the folded portion and the position where the film is guided to the forming plate change due to slight fluctuations in the speed or a slight external force applied to the film unexpectedly. When the change occurs even slightly, the running film tends to increase its amount of change during the run.
[0008]
The change in the folded portion described above causes the width of the ear portion of the package as a product to deviate from the specified value, and causes wrinkles in 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 operating rate of the apparatus.
[0009]
In view of such circumstances, an object of the present invention is to provide a filling and packaging apparatus and method that can always perform a stable operation with a folded portion being constant.
[0010]
[Means for Solving the Problems]
The filling and packaging apparatus according to the present invention includes a plurality of guide rollers for sequentially running and guiding a strip-shaped film drawn from the original fabric, and a folded portion having a predetermined width at one side edge of the strip-shaped film between any adjacent guide rollers. A folding device to be formed, a guide body that travels and guides the folded portion of the folded film, a forming plate that forms a belt-like film into a cylindrical film having a superposed portion at a side edge, and the above-mentioned below the forming plate A vertical sealing device that vertically seals the overlapping portion in the running direction, a nozzle device that enters the forming and fills the cylindrical film after the vertical sealing, and is formed at predetermined intervals in the running direction. And a horizontal sealing device for forming a horizontal seal on the cylindrical film in the absence of the contents.
[0011]
In such a filling and packaging apparatus, in the present invention, the peel strength after sealing rather than the vertical seal is arranged between the folding device and the forming plate, and the contact surface films of the folded portion are part of the contact surface area. A temporary seal device that seals in a line parallel to the side edge of the film with a small temporary seal, and the vertical seal device places the overlapped portion on the packaging surface film at a position between the folding line of the folded portion and the temporary seal. It is characterized in that it is arranged at a position welding to seal against the folded portion of the contact surface film and.
[0012]
According to the apparatus of the present invention, the belt-like film drawn from the original fabric and the plurality of guide rollers are sequentially guided to travel, and the folded portion is formed with a predetermined width on one side edge of the belt-like film during travel. The belt-like film is formed into a cylindrical film having a superposed portion by a forming plate, and the vertical seal is performed at the superposed portion, the contents are filled into the cylindrical film after the vertical seal, and then the film is formed. Absent portions of contents are formed at predetermined intervals in the traveling direction, and the cylindrical film is laterally sealed here. In the present invention, the contact surface films of the folded portion of the film are part of the contact surface area, and a temporary seal having a lower peel strength after sealing than the vertical seal is parallel to the film side edge at a position before the forming plate. To form.
[0013]
In such a package made according to the present invention, the envelope-shaped overlapped portion is brought into contact with the package film surface so that the inner and outer ears are formed, and the inner ear is sealed after the vertical seal. Only the package film surface is sealed by the temporary seal having a low peel strength, and the vertical seal is sealed between the position of the temporary seal and the folding line of the inner ear portion. By having the temporary seal, the sealing performance is improved and can be easily opened at the time of opening. At that time, if the outer ear is wider than the inner ear, the opening is further facilitated.
[0014]
In the present invention, the folding device includes a folding guide roller for projecting the film from the end in the axial direction by the folding width and guiding the film to travel, and a downstream position in the film traveling direction of the guide roller. A guide body that travels and guides the folded portion, the guide body is formed with a slit for guiding the travel of the folded portion, and the groove bottom portion of the slit extends in the width direction of the film with the end portion of the folding guide roller. It can be in approximately the same position. At that time, the folding device, in addition to the guide member and the said folding guide rollers, also to have a rotatable auxiliary roller to surface contact the film protruding portion to the end surface of the folding guide rollers it can.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 4 of the accompanying drawings.
[0016]
In FIG. 1, a plurality of horizontal guide rollers 1 to 7 that travel and guide a belt-like film F drawn from an original fabric (not shown) are arranged in parallel to each other. The direction in which the material is fed out is the upstream side, and the direction of the forming plate is the downstream side. The guide rollers 1-7 ging running direction while applying an appropriate tension to the belt-like film F. In FIG. 1, each of the plurality of guide rollers 1 to 7 is disposed horizontally, but may be inclined with respect to a horizontal plane or parallel to each other in the vertical direction, and the number thereof is not limited.
[0017]
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 surface 2 </ b> A is one end surface 1 </ b> A of the other guide roller. , 3A to 7A, they are positioned so as to be immersed in the axial direction of the guide roller by a predetermined distance.
[0018]
In the present embodiment, the second guide roller functions as a folding guide roller 2, and one side edge is between one end surface 1 A of the first guide roller 1 and one end surface 2 A of the folding guide roller 2. The belt-like film F guided so as to be located at the position is bent by a width 8 protruding from the one end face 2A.
[0019]
A guide body 9 is provided between the folding guide roller 2 and the next guide roller 3 located downstream in the film running direction A. The guide member 9, be formed parallel slits 9A to the film surface, the bottom of the slit 9A is in substantially the same position at the axial end surface 2A and the guide rollers of the folding guide roller 2. Therefore, in the slit 9A, the belt-like film F is folded back on the width 8 side, and the belt-like film F is guided to run while maintaining the folded portion F2 so that the width is constant. Thus, the end surface 2A of the folding guide roller 2 and the guide body 9 form a folding device.
[0020]
A temporary seal device 10 is provided in contact with the guide roller 4 located on the downstream side of the guide roller 3. The temporary sealing device 10 is located within the range of the width 8 of the folded portion F2 of the belt-like film F, and the temporary sealing 11 is performed by welding at the folded portion F2. The temporary seal 11 has a lower peel strength after sealing than a vertical seal described later. Although the space | interval of the guide body 9 and the temporary seal apparatus 10 is spaced apart in FIG. 1, the temporary seal apparatus 10 may be provided directly adjacent to the guide body 9. Moreover, the roll 3 may be provided between the guide body 9 and the temporary sealing device 10 to further enhance the travel guidance of the belt-like film F guided to the temporary sealing device 10.
[0021]
A known forming plate 12 is provided downstream of the last guide roller 7. The forming plate 12 is a cylindrical plate overlapped with a gap at one place in the circumferential direction, and the upper end is cut obliquely. The forming plate 12 travels along the circumferential surface while running the belt-like film F from the guide roller 7. It winds and forms in the cylindrical film F4 which has the superimposition part F3. A vertical sealing device 13 is disposed immediately below the forming plate 12. The vertical sealing device 13 forms a vertical seal 15 by sandwiching and welding the overlapping portion F3 of the traveling tubular film F4 from the inside and outside of the tubular film F4 to form a tubular body. The vertical sealing device 13 itself is well known and may be of any type. For example, in the case of ultrasonic welding, an ultrasonic horn is disposed outside the tubular film F and an anvil is disposed inside. The vertical sealing device 13 is located between the temporary seal 11 and the folded edge F2A of the folded portion F2 in the circumferential direction of the tubular film F4.
[0022]
As for the packaging material used for the package P shown in FIG. 3 to be described later, a stretched or unstretched film or sheet having a thickness of 20 μm to 500 μm can be suitably used as the packaging material. 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.
[0023]
A film or sheet made of a chlorine-based resin that easily causes high-frequency dielectric heating can be used as a single layer.
[0024]
As the olefin-based resin, polyethylene, polypropylene, an ethylene / alkyl (meth) acrylate copolymer, a 4-methylpentene polymer alone or a mixture thereof is preferable, and a polypropylene mainly composed of an ethylene / methyl acrylate copolymer is more preferable. And polypropylene or polypropylene.
[0025]
A nozzle 14 is inserted into the forming plate 12 from above, and the cylindrical body film F4 provided with the vertical seal 15 is filled with the contents.
[0026]
Hereinafter, the procedure of filling and packaging in the present embodiment will be described with reference to FIG. 1 in addition to FIG.
[0027]
(1) The belt-like film F (see FIG. 2A) guided by the guide roller 1 is projected from the end surface 2A by a width 8 by the next folding guide roller 2 (see FIG. 2B). . This overhang is folded back to the back side (lower side) when the film F is set before traveling so as to form a folded portion F2, and is stored in the slit 9A of the guide body 9 by the operator. Even after the start of traveling, the folded portion F maintains its folded state by the slit 9A (see FIG. 2C).
[0028]
(2) the folded portion F 2 is in the range of the width 8, the temporary seal 11 is formed by a temporary sealing device 10 at the position of the guide roller 4 (see FIG. 2 (D)). The temporary seal 11 may be a continuous line along the film side edge or a discontinuous line. The width of the continuous line or discontinuous line is preferably linear or strip-like.
[0029]
(3) Thus, the belt-like film F is brought into the forming plate 12 in a state where the width of the folded portion F2 is always constant due to the temporary seal 11, and becomes the cylindrical film F4 having the overlapping portion F3 ( (See FIG. 2 (E)).
[0030]
(4) After that , in the tubular film F4, the vertical seal 15 is continuously formed in the film running direction by the vertical seal device 13. As a result, the tubular film F4 forms an overlapped portion folded in an envelope shape by the folded portion F2 and the overlapped portion F3.
[0031]
(5) The cylindrical film F4 after the vertical sealing is filled with the contents from the nozzle 14, and then deformed into a flat shape by means (not shown), and the absence of the contents is provided at predetermined intervals in the traveling direction. It is clamped so as to be formed, laterally sealed there, and cut at the lateral seal portion to obtain individual packages as products.
[0032]
(6) The package P thus obtained has an outer shape as shown in FIG. 3 (A), and its cross section is as shown in FIG. 3 (B). In this cross-sectional shape, the overlap portion F3 of the film falls over and overlaps with the folded portion F2 forming the inner ear portion, and is wider than the folded portion F and covers the outside to form the outer ear portion. . Regarding the seal, the temporary seal 11 is made only between the folded portion F2 and the inner surface film of the package P, whereas the vertical seal 15 is for the overlapped portion F3, the folded portion F2 and the three inner surface films. has been Do not. As described above, the temporary seal 11 has a lower peel strength than the vertical seal 15 and is preferably an easy-open seal, whereas the vertical seal is a gas-tight seal.
[0033]
(7) At the time of opening the contents, in FIG. 3 (B), the overlapped portion F3 which is the outer ear portion is picked up with a finger to stand up. Then, the temporary seal 11 is easily peeled off from the inner surface film and the folded portion F2 stands together with the overlap portion F3. Thereafter, the overlapping unit F3 serving the outer ear with one hand, the longitudinal seal 15 is also peeled off by opening in opposite directions picking inner ear portion serving turnup portion F2 with the other hand, it is taken out of the contents It becomes possible.
[0034]
The present invention is not limited to the illustrated embodiment and can be variously modified. For example, the auxiliary roller 16 may be brought into contact with the end surface 2A of the folding roller 2 as shown in FIG. By doing so, the protruding portion of the width 8 of the film F is sandwiched between the auxiliary roller 16 and the end face 2A, and can be bent for turning back with only a slight resistance.
[0035]
In the present invention, various means for heating the seal itself can be applied. For example, high-frequency dielectric heating, ultrasonic heating, resistance heating, hot air heating (hot jet heating), or laser heating can be used. At that time, in the present invention, the peel strength after sealing of the temporary seal needs to be smaller than that of the vertical seal.
[0036]
(A) for sealing when using a film or sheet made of a chlorine-based resin in packaging material, the peel strength after the seal has approximately the order in accordance with the sealing means, high-frequency dielectric pressurized thermal> ultrasonic heating> resistance Heating. Therefore, it is preferable that the vertical seal is performed by high frequency dielectric heating and the temporary seal is performed by resistance heating as an aspect, and the welding means of the vertical seal is performed by ultrasonic heating and the temporary seal is performed by resistance heating as another aspect. Is preferred.
[0037]
(B) Regarding the seal when a film or sheet made of a non-chlorine resin is used as the packaging material, the peel strength after the seal has approximately the order depending on the sealing means, and flame heating (hot jet heating)> exceeded Sonic heating> resistance heating. Therefore, it is preferable that the vertical sealing is performed by hot air heating (hot jet heating) and the temporary sealing is performed by resistance heating. As another aspect, vertical sealing is performed by ultrasonic heating. It is preferable to perform temporary sealing by resistance heating. It is well known that the peel strength after sealing of these seals depends on the heating time, heating temperature or heating pressure.
[0038]
Further, when the belt-like film F is guided to the forming plate 14, the adhesion of the surface of the roller 7 may be increased in order to increase the stability. For this purpose, an anti-slip tape is wound around the surface of the roller 7. You can turn it.
[0039]
【The invention's effect】
In the present invention, as described above, when the folded portion of the film to be one of the ear portions of the package is formed, the folded portion is temporarily sealed. Therefore, even if the traveling film reaches the forming plate, the folded portion is returned. The width is constant without fluctuation, and the filling and packaging apparatus is less likely to be stopped for readjustment of the width of the folded portion, so that the operating rate of the apparatus is improved and the occurrence of defective products can be prevented. Thus, the temporary seal at the folded portion functions as an auxiliary seal for the vertical seal, can prevent contamination in the vicinity of the vertical seal, and when opened, the temporary seal has a low peel strength with respect to the vertical seal. By doing, the easily openable package can be obtained.
[Brief description of the drawings]
FIG. 1 is a schematic configuration perspective view of an apparatus according to an embodiment of the present invention.
FIGS. 2A and 2B are cross-sectional views of the film from the time when the belt-shaped film is temporarily sealed to the vertical sealing in FIG. 1, where FIG. 2A is a belt-shaped film and FIG. , (C) shows when the folded portion is formed, (D) shows when temporarily sealed, (E) shows when the cylindrical film is formed, and (F) shows when vertically sealed.
3 shows a package obtained by the apparatus of FIG. 1, wherein (A) is a perspective view showing an outer shape, and (B) is a cross-sectional view.
FIG. 4 is a diagram showing another embodiment.
FIGS. 5A and 5B show a conventional wrapping procedure, in which FIG. 5A shows a cross-section when forming a wrapping body, FIG. 5B shows a strip-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 (width)
9 Overhang part (guide body)
DESCRIPTION OF SYMBOLS 10 Temporary seal apparatus 11 Temporary seal 12 Forming plate 13 Vertical seal apparatus 14 Nozzle apparatus 15 Vertical seal 16 Auxiliary roller F Belt-like film F2 Folding part F2A Folding line F3 Overlapping part F4 Cylindrical film

Claims (4)

A plurality of guide rollers for sequentially running and guiding the belt-like film drawn from the original fabric, a folding device for forming a folding portion of a predetermined width at one side edge of the belt-like film between any adjacent guide rollers, and a belt-like film A forming plate formed in a cylindrical film having a superposed portion at a side edge, a vertical seal device for performing a vertical seal in the running direction on the superposed portion below the forming plate, and entering the forming into a vertical direction Filling packaging having a nozzle device that fills a cylindrical film after sealing, and a horizontal sealing device that forms a horizontal seal on the cylindrical film at the absence of the content formed at predetermined intervals in the running direction In the apparatus, it is arranged between the folding device and the forming plate, and the contact surface films of the folded portion are partly in the contact surface area after sealing, rather than the vertical seal. Comprising a temporary sealing device for sealing the film side edge and parallel to the linear small temporary sealing releasability strength, vertical seal portion of the vertical sealing device, at a location between the fold return line and the temporary sealing of the folded portion, heavy A filling and packaging apparatus, wherein the mating portion is disposed at a position where the mating portion is welded to and sealed against the packaging surface film and the contact surface film of the folded portion.   The folding device includes a folding guide roller for extending the film by a folding width from an axial end portion of the guide roller upstream of the folding device, and a guide roller for folding to guide the film, and a downstream position in the film running direction of the guide roller. A guide body for guiding the travel of the folded portion of the folded film, and the guide body is formed with a slit for traveling guidance of the folded portion, and the groove bottom portion of the slit is used for the folding in the width direction 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 an end of the guide roller. The folding device includes a folding guide roller for extending the film by a folding width from an axial end portion of the guide roller upstream of the folding device, and a guide roller for folding that guides the film, and a downstream position in the film running direction of the guide roller. The guide body for guiding the running of the folded portion of the folded film, and a rotatable auxiliary roller for contacting the film overhanging portion with the end surface of the folding guide roller. Filling and packaging equipment. The belt-like film drawn from the original fabric is sequentially guided by a plurality of guide rollers, and a folding portion is formed with a predetermined width on one side edge of the belt-like film being run by a folding device , and the belt-like film is formed into a forming plate. Formed into a cylindrical film having a superposed part, and vertically sealed in the superposed part, filled with the contents in the cylindrical film after the vertical seal, 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, and the cylindrical film is laterally sealed here, the contact surface films of the folded portion of the film are partly in the contact surface area, before the forming plate. in position, than the longitudinal seal to form a small temporary seal peeling strength after the sealing the film side edge and parallel to the linear, at a location between the fold line and the temporary sealing of the folded portion thereafter, polymerization Filling and packaging method which is characterized in that the longitudinal sealing part against the contact surface film of the packaging surface film and the folded portion.

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