JP3574947B2 - Film bag making equipment in horizontal bag making and filling machine - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a film bag making device used in a horizontal packaging machine.
[0002]
[Prior art]
In a horizontal stretch wrapping machine using a film for stretch shrink wrapping having a large frictional resistance, such as having a thinner thickness than a general pillow wrapping film and having self-adhesiveness, the film is formed into a tubular shape. In molding, due to its material, good bag making cannot be performed by a bag making device for pillow packaging. Therefore, in the case of such a stretch wrapping machine, for example, as disclosed in Japanese Patent Application Laid-Open No. 10-291504, a belt-shaped stretch film is moved above a conveyer device with respect to an article conveyed by the conveyer device in the direction of conveying the product. In general, the stretch film is stretched and stretched to cover the article in a tubular shape and packaged. As in the case of stretch shrink wrapping, the film is formed into a tubular shape with a margin for the article, the seal is cut at the front and rear positions of the article, and the obtained bag is heated and shrunk by heating means, so that the film is applied to the article. Although a device for expanding a film is not originally required for obtaining a package having a close contact, packaging is performed using the stretch packaging machine for convenience.
[0003]
[Problems to be solved by the invention]
The above-mentioned stretch wrapping machine is handled as a dedicated machine for wrapping articles with a stretch film, and cannot perform general pillow wrapping. Therefore, when performing different wrapping, individual wrapping corresponding to the film to be used is performed. Machine was installed. However, as in today, despite the need to perform high-mix low-volume production according to the user's preferences, installing a dedicated packaging machine for each film of different properties and performing production requires a production line. There are many problems, such as an increase in installation space, an increase in production efficiency, and an increase in the cost of purchasing a packaging machine.
[0004]
[Object of the invention]
SUMMARY OF THE INVENTION The present invention has been proposed in view of the above-mentioned problems inherent in the conventional technology, and has been proposed to solve the problem suitably. One horizontal packaging machine can use films having different properties. An object of the present invention is to provide a film bag making apparatus in a bag filling machine.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problems and appropriately achieve the intended purpose, the present invention
A film bag forming apparatus for forming a belt-shaped film into a tubular shape in the feeding process,
A pair of bag-making wings arranged to sandwich the center of the film feeding line and setting the bag-making height of the cylindrical film,
A wing portion extending upwardly and inclining outward from the lower edge of the vertical side portion in each of the bag-making wings;
The extend are arranged in the width direction to the film entry side base end of each wing, initial contact edge of the film together with the surface is formed to be slightly uneven is set to R-shape adhesive With a prevention member,
Without the upper surface of the strip of film to be fed drawer fed from the top side is in direct contact to the edge portion of the film entry side of the wings, the sheet on the downstream side in the R shape of the anti-blocking member is abutting the guide By being sent, the film is configured to be formed into a cylindrical shape,
Further, at least a portion where the film comes into contact with and passes through is subjected to an anti-adhesion treatment of the film.
[0006]
[Action]
The site where the film of the film bag device contacts passes antiblocking film processing is performed Rutotomoni, that strip of film is fed to the downstream side is abutting guide, forming the film into a tubular shape Since the anti-adhesion member is disposed so as to extend in the width direction at the base end of the wing portion of the bag making wing on the film entry side , smooth bag making is achieved even when a film having self-adhesion is used. That is, a single wrapping machine can be used for a film having different properties, such as a general pillow wrapping film and a stretch shrink wrapping film. Furthermore, the initial contact edge of the film tacky adhesive preventing member because is R-shaped, be a film having a self-adhesive with thin and smooth introduction of the formulation bag device is achieved Good bag making can be done.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, a film bag making apparatus in a horizontal bag making and filling machine according to the present invention will be described below with reference to the accompanying drawings by taking a preferred embodiment.
[0008]
FIG. 1 shows a film bag making apparatus in a horizontal bag making and filling machine according to an embodiment. The bag making apparatus 10 has a feeding direction of a band-like film F fed from a supply source (not shown). The film bag making apparatus 10 is provided at a predetermined position of a horizontal bag making and filling machine via the base 12. At a position corresponding to the center of the film feeding line of the base 12, as shown in FIG. 3, a concave portion 12 a that is recessed downward is formed, and a longitudinal direction of the film F formed into a cylindrical shape by the film bag making apparatus 10 is formed. Is configured not to interfere with the base 12.
[0009]
On the upper surface of the base 12, a pair of fixing plates 16, 16 are horizontally disposed via spacers 17, 17 symmetrically in the width direction with respect to the center of the film feeding line. A gap S of a required size is defined between the 16 opposite sides in parallel with the film feeding direction. The two fixing plates 16 and 16 function to support and guide the lower part of the cylindrical film F in a contact state, and to the downstream side in a state where the overlapping portion in the longitudinal direction of the film F faces downward through the gap S. It is to be fed. The upstream side of each fixed plate 16 in the film feeding direction is an inclined side 16a separated from the other fixed plate 16 toward the upstream side, and a V-shaped introduction portion is defined between the opposed inclined sides 16a, 16a. Is done. Then, the vicinity of the longitudinal edge of the film F to be formed into a tubular shape is folded downward through the two inclined sides 16a, 16a, so that the overlapping portion is formed. In addition, guide plates 18, 18 are opposed to both sides sandwiching the gap S on the lower surface of the fixed plates 16, 16 near the inclined sides 16 a, 16 a, and are vertically suspended in a C-shape. It is configured such that the overlapping portion in the longitudinal direction of the cylindrical film F is guided in contact and fed to the downstream side.
[0010]
On the upper surfaces of the fixing plates 16, 16, a pair of side plates 20, 20 for guiding the side portions of the film F formed into a cylindrical shape in a contact state and setting the width dimension of the cylindrical film F are provided. The two side plates 20, 20 are arranged so as to move obliquely in parallel to the film feeding direction by an adjustment mechanism described later, being spaced apart and opposed to each other in the width direction across the center of the feeding line. As shown in FIG. 2, each side plate 20 has a parallel portion 20a extending along the fixing plate 16, and extends upward from the upstream end of the parallel portion 20a in the film feeding direction toward the upstream side. Inclined portion 20b. On the upper surface of each fixed plate 16, a swing plate 24 horizontally extending from the upstream end to the upstream side is pivotally supported on the fixed plate 16 via a fulcrum pin 26 so as to be horizontally swingable. ing. Opposite sides of the two swinging plates 24, 24 facing each other with the center of the film feeding line therebetween are inclined sides 24a separated from the other swinging plate 24 toward the upstream side, and between the opposed inclined sides 24a, 24a. A V-shaped introduction portion is defined at the bottom. The lower portion of the film F formed into a tubular shape is contacted and guided to the downstream side on the upper surfaces of the swing plates 24, 24, and the vicinity of the longitudinal edge of the film F is inclined at both ends. It is designed to be folded downward through the sides 24a, 24a.
[0011]
A substantially triangular introduction plate 32 is pivotally supported on the upstream lower surface of each side plate 20 via a fulcrum pin 34 disposed at the upstream end thereof so as to be horizontally swingable. A plate 32 is placed on the upper surface of the swing plate 24 in a sliding contact state. That is, after the lower portion of the film F formed into a cylindrical shape is guided in contact with the upper surfaces of the introduction plates 32 on both sides of the center of the film feeding line, the lower portion of the film F contacts the swinging plates 24, 24. It is configured to be guided. A long hole 24b extending in parallel with the inclined side 24a is formed in the swing plate 24, and a pair of pins 35, 35 projecting from the bottom surface of the corresponding introduction plate 32 slide in the long hole 24b. It is movably inserted. In this state, the side of the introduction plate 32 facing the other introduction plate 32 is an inclined side 32a set to have substantially the same inclination angle as the inclined side 24a of the corresponding swing plate 24, and the width adjustment described below is performed. Also, the inclined side 24a of the swinging plate 24 and the inclined side 32a of the introduction plate 32 always coincide substantially linearly. The vicinity of the edge in the longitudinal direction of the film F is folded downward via both inclined sides 32a, 32a of the introduction plates 32, 32. At the sides 24a, 24a, it is folded further downward. At the upstream end of the introduction plate 32, a guide piece 32b that curves upward toward the outside of the side plate 20 is formed, and the vicinity of both ends in the width direction of the band-shaped film F is contacted and guided by the guide piece 32b. It is configured as follows.
[0012]
As shown in FIG. 1, the outside of the parallel portion 20a of each side plate 20 is inclined at an angle larger than the inclined side 16a of the corresponding fixed plate 16 with respect to the side plate 20 (from the downstream side in the film feeding direction to the upstream side). A mounting member 37 which is inclined toward the outside from the side plate 20 toward the outside is disposed, and a rack 36 having a required length is disposed in parallel with the mounting member 37 with the teeth facing outward. The mounting member 37 and the rack 36 are formed by a support member 14 disposed at each end in the width direction of the base 12 and a holding plate 40 disposed above and separated from the member 14 via a spacer 38. The inner surface of the mounting member 37 is slidably supported by the spacer 38 while slidably facing therebetween. A pinion 42 meshing with the rack 36 is rotatably supported between the support member 14 and the holding plate 40 on the side opposite to the spacer 38 with the rack 36 interposed therebetween. By rotating the pinion 42 in the forward and reverse directions, the side plate 20 is configured to move obliquely in parallel with the film feeding direction under the meshing action of the pinion 42 and the rack 36. The pinion 42 faces a position corresponding to the base 12, and the rotation shaft 46 protrudes downward from the base 12. The upstream end of the mounting member 37 is connected to the side plate 20 via a bracket 44.
[0013]
As shown in FIG. 3, bevel gears 50 are fixed to both shaft ends of a shaft 48 rotatably disposed on the base 12, and each bevel gear 50 is fixed to a lower end of a rotation shaft 46 of a corresponding pinion 42. 52. A width adjustment handle 54 is provided on a rotation shaft 46 extending above the holding plate 40 of one of the pinions 42. By rotating the adjustment handle 54 in the forward and reverse directions, the pair of pinions 42, 42 is formed. The pair of side plates 20 and 20 are rotated in opposite directions to each other so that the pair of side plates 20 and 20 are opposed to each other across the center of the film feeding line and are moved parallel to and obliquely to the feeding direction so as to move toward and away from each other. Be composed.
[0014]
At the upstream end of the side plates 20, 20, a pair of bag making wings 56, 56 for setting the bag making height of the cylindrical film F are arranged with the film feeding line center therebetween. As shown in FIG. 3, each of the bag-making wings 56 extends vertically along the inner side surface of the corresponding side plate 20, and extends upward from the lower edge of the vertical side 56a toward the outside. And a downstream end of the vertical side portion 56a is pivotally supported on the side plate 20 via a fulcrum pin 58 so as to be vertically swingable. Then, the band-shaped film F drawn out and fed from above to the film entry side base end of the wing portions 56b, 56b of both the bag making wings 56, 56 is abutted and guided and fed to the downstream side. The film F is formed into a cylindrical shape.
[0015]
A height adjusting handle 60 is rotatably disposed outside the inclined portion 20b of each of the side plates 20, and a connecting member 62 that rotates integrally with the handle 60 is provided with a corresponding one of the bag making wings 56. It is pivotally supported by the vertical side portion 56a. Then, the height adjustment handle 60 is rotated in the forward and reverse directions to tilt the bag-making wing 56 in the vertical direction via the connecting member 62, and the bending upstream end position between the vertical side portion 56a and the wing portion 56b can be changed. By doing so, the bag making height of the tubular film F is adjusted. The height adjustment handle 60 is engaged with a ball, which is provided on the side plate 20 and is circumferentially urged and arranged to be able to advance and retreat, in a recess formed in the side plate 20 and spaced a predetermined distance in a circumferential direction. , Can be positioned intermittently in the circumferential direction.
[0016]
As shown in FIG. 1, scale portions 60 a provided with scales corresponding to the bag making height dimensions at required intervals are provided on the peripheral surface of the height adjustment handle 60, and the scale portions 60 a correspond to the side plates 20. A reference line L is provided at the upper surface position where the reference line L is located. That is, when individually adjusting the pair of height adjustment handles 60, 60, the pair of bag-making wings 56, 56 are positioned at the same position by rotating each handle 60 so that the same scale matches the reference line L. Positioning can be adjusted.
[0017]
An anti-adhesion member 64 formed by machining (cutting) using, for example, ultra-high polyethylene having low friction characteristics in a resin material is provided at the base end of the wing portion 56b of each of the bag-making wings 56 on the film entry side. Are arranged to extend in the width direction. The surface of the anti-adhesion member 64 is formed to be slightly uneven by being cut so as to prevent the adhesion of the film, so that the smooth transfer of the adhesive film F can be achieved. ing. The first edge of the anti-adhesion member 64 that comes into contact with the film F (the base end on the film entry side) is formed in a required R (arc) shape. That is, the band-shaped film F fed from the supply source toward the film bag making apparatus 10 is directly connected to the edge (corner where two surfaces intersect) of the thin wing portion 56b on the film entry side. Without contact, the upper surfaces of the pair of anti-adhesion members 64, 64 are guided into contact with the R-shaped film entry-side base end portions and introduced into the bag making apparatus 10, and then fed downstream. The thin film can be transported without damage. Note that the anti-adhesion member 64 may be a molded product instead of a machined product as long as the surface finish can prevent adhesion of the film.
[0018]
In the film bag making apparatus 10 configured as described above, the surfaces of the metal bag making wings 56, the side plate 20, the introduction plate 32, the swing plate 24, the fixed plate 16, the guide plate 18, and the like through which the film F contacts and pass. Is subjected to an anti-adhesion treatment of the film by shot processing or the like, so that a good bag-making can be performed even with a film having a self-adhesive action such as a stretch shrink film. The anti-adhesion treatment to be performed on each of the members 56, 20, 32, 24, 16, 18 may be performed only on the surface with which the film F contacts, instead of the entire surface. Incidentally, the material of the side plate 20 is aluminum, and the material of the other members 56, 32, 24, 16, 18 is stainless steel.
[0019]
Operation of the embodiment
Next, the operation of the film bag making apparatus in the horizontal bag making and filling machine according to the above-described embodiment will be described.
[0020]
When the belt-like film F is fed to the film bag-making apparatus 10, the anti-adhesion members 64, 64 disposed on the pair of bag-making wings 56, 56 whose upper surfaces are separated in the width direction. As a result of being bent by contacting the base end of the film entry side, and being guided by contact with the bag-making wings 56, 56 and being fed downstream along the inside of the side plates 20, 20, the lower part is It is formed in a substantially cylindrical shape that opens. The vicinity of the longitudinal edge of the film F is folded downward while being guided by the inclined side 32a of the introduction plate 32, the inclined side 24a of the swing plate 24, and the inclined side 16a of the fixed plate 16. By being introduced into the gap S, a cylindrical film F having a longitudinally overlapped portion is formed. Then, an unillustrated packaged object is filled and supplied to the cylindrically formed film F from an upstream side through an appropriate supply unit.
[0021]
In this case, the surface of each of the members 56, 20, 32, 24, 16, 18 in the film bag making apparatus 10 through which the film F contacts and passes is subjected to a film anti-adhesion treatment. A smooth transfer is achieved. Further, since the frictional resistance between the film F and each of the members 56, 20, 32, 24, and 16 supporting the bottom surface and the side surface of the packaged object with the film F interposed therebetween is reduced, the thickness is reduced and the self-adhesiveness is reduced. Even if it is a stretch shrink film having a
[0022]
In the case of forming a cylindrical film F having a different bag making width and height by changing the order, the pair of pinions 42, 42 are moved in opposite directions by rotating the width adjusting handle 54 in a required direction. Rotate. As a result, the pair of side plates 20, 20 move obliquely in parallel to the film feeding direction via the racks 36, 36 meshing with the pinions 42, 42, and the cylindrical film F according to the new order. Is adjusted to the position corresponding to the width of. Further, with the movement of each side plate 20, the corresponding introduction plate 32 moves along the long hole 24b of the swing plate 24, and both plates 32, 24 horizontally swing around the fulcrum pins 34, 26 as fulcrums. The inclined sides 32a, 24a are aligned and aligned substantially on a straight line. That is, even if the separation width (bag making width) of the pair of side plates 20, 20 is changed, the inclined sides 32a, 24a of the two plates 32, 24 are always aligned substantially in a straight line. It is possible to smoothly guide the overlapping section.
[0023]
Further, the height adjustment handles 60 provided on each side plate 20 are rotated in a required direction, and the scale corresponding to the desired bag making height dimension provided on the handles 60 matches the reference line L of the side plate 20. By doing so, the bag making wing 56 is changed to a position corresponding to the bag making height of the cylindrical film F according to the new order.
[0024]
[Modification example]
The film bag making apparatus according to the present invention is not limited to the configuration of the embodiment described above, and various modifications are possible.
For example, the anti-adhesion treatment with the film, in addition to shot processing, fluorine processing, or subjected to various other frictional resistance reduction processing, or can be made of a material of a material that can prevent the film bagging device from adhesion, or can be anti-adhesion The member may be provided at a contact portion with the film.
In the embodiment, an anti-adhesion member made of ultra-high polyethylene is disposed on the bag-making wing, but the anti-adhesion member is made of a resin material such as engineering plastic or a material made of other materials. There may be .
[0025]
【The invention's effect】
As described above, the film bag apparatus in horizontal bag filling machine according to claim 1 of the present invention, the contact passage portion and at least the film of the film bag device, with facilities to sticking prevention processing of the film, the strip Since the anti-adhesion member is arranged to extend in the width direction at the film entry side base end of the wing portion of the bag making wing for forming the film into a cylindrical shape , for example, a general pillow packaging film, or a stretch shrink A dual-purpose packaging using a film having excessive frictional resistance, such as a thin film having self-adhesiveness, can be performed. Further, it is not necessary to separately install a packaging machine suitable for each film having different properties, so that the equipment cost can be reduced, the installation space can be reduced, and the space efficiency can be improved.
[0026]
Furthermore, according to the film bag apparatus according to claim 1, the initial contact edge of the film of the anti-blocking member since the R shape, even if the frictional resistance mentioned above uses an excessive film formulation Good bag making can be achieved by smoothly introducing the bag into the bag device.
[Brief description of the drawings]
FIG. 1 is a plan view showing a film bag making apparatus in a horizontal bag making and filling machine according to a preferred embodiment of the present invention.
FIG. 2 is a side view of the film bag making apparatus according to the embodiment.
FIG. 3 is a front view of the film bag making apparatus according to the embodiment, as viewed from a film entry side.
[Explanation of symbols]
64 Anti-adhesion protection material F film

Claims (3)

A film-forming apparatus for forming a belt-like film (F) into a tubular shape in the feeding process,
A pair of bag-making wings (56, 56) arranged so as to sandwich the center of the film feeding line and setting the bag-making height of the cylindrical film (F),
A wing portion (56b) extending so as to be inclined upward and outward from the lower edge of the vertical side portion (56a) in each of the bag making wings (56),
The extend are arranged in the width direction to the film entry side base ends of the wings (56b), the first contact end edge of the film (F) together with the surface is formed to be slightly uneven shape R With an anti-adhesion member (64) set in shape ,
Upper surface the wings of the strip of film to be fed drawer fed from the top side (F) (56b, 56b) without direct contact with the edge portion of the film entry side of the anti-blocking member (64, 64) The film (F) is configured to be formed into a cylindrical shape by being guided in contact with the R shape and fed downstream.
Furthermore, a film bag making apparatus in a horizontal bag making and filling machine, characterized in that at least a portion where the film (F) comes into contact with and passes through is subjected to a film anti-adhesion treatment. 2. A film bag making apparatus in a horizontal bag making and filling machine according to claim 1, wherein said anti-adhesion treatment is shot processing. 3. A film bag making apparatus in a horizontal bag making and filling machine according to claim 1, wherein said anti-adhesion member (64) is formed of a resin material having low friction characteristics .

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